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Journal articles on the topic 'Stamping operations'

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Published: 3 June 2025

Last updated: 20 July 2025

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Pačák, Tomáš, Martin Kubelka, František Tatíček, and Tomáš Pilvousek. "The Methodology for Determining the Springback of Large Metal Stampings." Key Engineering Materials 635 (December 2014): 151–56. http://dx.doi.org/10.4028/www.scientific.net/kem.635.151.

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In the stamping operation, springback causes geometrical inaccuracies and defects in final shape of metal stampings. This defect is actual problem in stamping production. Nowadays the detailed description of the springback is not clarified well regarding production of more complicated shape. To eliminate springback problem in stamping production there are methods, discovered and approved by advanced procedures. However applying these methods, particularly in drawing operations is much more complicated. The research describes theoretical analysis of springback phenomenon and possible experiments for the springback compensation. The research also describes analysis of springback using software for numerical simulation AutoFormplus R5 which is currently used to design the process of stamping production in company ŠKODA AUTO.

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Aly, Shady, Hend Abdelaaty, Osama Muneer Dawood, and Hussein M. A. Hussein. "Optimization of strip-layout using graph-theoretic methodology for stamping operations on progressive die: a case study." International Journal for Simulation and Multidisciplinary Design Optimization 12 (2021): 5. http://dx.doi.org/10.1051/smdo/2021004.

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The design of the progressive die stamping process is optimized through minimizing the number of die stamping stations in the strip layout to reduce the die cost. In order to accomplish such end, in this study, a graph-theoretic based method is implemented to model and optimize the strip layout design. This method starts with mapping stamping features into stamping operations. This step is followed by constructing two graphs to model the precedence and adjacency constraints among stamping operations based on a set of manufacturing rules. These two graphs are called: operation precedence graph and operation adjacency graph. In the next step, a topological sorting algorithm clusters the operations into partially ordered sets. Then, a graph coloring algorithm clusters the partially ordered operations sets into final sequence of operations. The graph-theoretic technique has been implemented on a part currently manufactured by laser cutting process technology in some Egyptian factory in Cairo. This study indicated that the graph-theoretic technique offers several advantages including the ease of programming and transparency in understanding the obtained strip layout design. This is besides being a systematic and logically approach to obtain an optimized strip layout design. In general, the progressive die manufacturing can increase productivity of sheet metal works in Egypt, only in situations of mass production. The limitation is that it requires considerable skill level and training for labor to conduct die strip layout design.

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Birkert, A., P. Zimmermann, B. Hartmann, and M. Nowack. "Advanced Springback Compensation Strategy through elimination of avoidable elastic strain energy." IOP Conference Series: Materials Science and Engineering 1238, no. 1 (2022): 012083. http://dx.doi.org/10.1088/1757-899x/1238/1/012083.

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Abstract The stamping of dimensionally accurate sheet metal body components still represents a huge challenge in the automotive industry. This is partly caused by the multi-stage production process which complicates the design of an appropriate compensation strategy dramatically. A key prerequisite of an appropriate compensation strategy is to eliminate any undesired influence of elastic energy being potentially induced when closing the blankholders in the several operations throughout the production process. Here, a universally applicable compensation strategy is presented which fulfils this requirement thoroughly; by applying this process, the involved strain energy is reduced to a minimum due to proper part position in all operations. Technically this compensation strategy is achieved by, first, simulating all operations of the stamping process individually, second, by individually calculating the springback after each operation and, third, by accumulating the calculated deviation vector fields for each operation appropriately, which are then used for springback compensation. The process is time and cost effective and the required efforts are moderate even for complicated multistage stamping operations.

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Chu, Chang Yong. "A Graph and Matrix Based Approach for Stamping Operation Sequencing for Progressive Die Design." Advanced Materials Research 421 (December 2011): 564–69. http://dx.doi.org/10.4028/www.scientific.net/amr.421.564.

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Two graphs are introduced to describe the precedence and cluster constraints among stamping operations, i.e., operation precedence graph and operation adjacency graph. A graph colouring algorithm clusters the operations based on both the precedence and adjacency graphs to form joint operations. A joint operation matrix is then generated. A matrix based algorithm is presented to iteratively order the joint operations to generate the final sequence according to the index of priority for each operation. The algorithm is implemented in C++ and is fully integrated with SolidWorks CAD system. A case study is presented to illustrate the algorithm.

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Ceron, Ermanno, and Nils Bay. "Determination of Friction in Sheet Metal Forming by Means of Simulative Tribo-Tests." Key Engineering Materials 549 (April 2013): 415–22. http://dx.doi.org/10.4028/www.scientific.net/kem.549.415.

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Numerical modeling of complex sheet stamping operations is well developed and implemented in industry. The weakest link now seems to be appropriate modeling of friction and to some extent also material properties especially when it comes to new lubricants and materials. In modeling of 3-D stamping operations a coefficient of friction μ is often determined by calibration of the simulation results with experimental observations of material flow and/or measured load. In case of modeling of new stamping operations μ is typically selected based on former experience. These procedures are, however, not appropriate when introducing new tribo-systems (lubricant, workpiece material, tool material or tool coating). In order to determine friction under the very varied conditions in sheet stamping simulative testing may be applied, e.g., Plane-Strip-Testing (PST), Draw-Bead-Testing (DBT) and Bending-Under-Tension testing (BUT) but these tests should be analyzed and carefully tuned with the production process in question to ensure useful results. The present paper illustrates how the BUT test combined with classical analytical modeling may lead to very large errors in estimation of the coefficient of friction, whereas detailed numerical simulation of the test can give useful friction values as demonstrated in comparative analysis of an industrial, multistage deep drawing.

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Chu, C. Y., S. B. Tor, and G. A. Britton. "A graph theoretic approach for stamping operations sequencing." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 218, no. 4 (2004): 467–71. http://dx.doi.org/10.1243/095440504323055597.

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Moghaddam, M. J., M. R. Soleymani, and M. A. Farsi. "Sequence planning for stamping operations in progressive dies." Journal of Intelligent Manufacturing 26, no. 2 (2013): 347–57. http://dx.doi.org/10.1007/s10845-013-0788-0.

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Turetta, A., S. Bruschi, and A. Ghiotti. "Investigation of 22MnB5 formability in hot stamping operations." Journal of Materials Processing Technology 177, no. 1-3 (2006): 396–400. http://dx.doi.org/10.1016/j.jmatprotec.2006.04.041.

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MWS, Sanjeewani, and Seneviratne L. "An Accurate and Efficient Technique for Envelop Sorting and Stamping." European Journal of Advances in Engineering and Technology 5, no. 4 (2018): 230–35. https://doi.org/10.5281/zenodo.10707039.

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ABSTRACT Stamping envelopes is quite a tedious task in the postal services. Human errors and inefficiencies are among the problems related to this service. Most of the countries around the world perform almost all the postal operations manually. This includes manual envelop sorting and stamping. Having automated process to increase the efficiency in envelop sorting and stamping will truly increase the efficiency in the postal service. This paper focuses on a stamping machine which is fully automated, thereby requiring minimal human interaction. The essential part of the work is to design and implement a mechanical system for the stamping process. The major challenge was to produce such an automated stamping machine with low cost and minimal energy consumption, while meeting the requirement of the end users. A conceptual design has been developed, and a prototype has been built. The implemented system is able to detect envelopes and then perform the stamping on the envelope. Image processing techniques play a key role in this project. The stamping is given on top of the stamp which is pasted on the envelope. Statistics show that the functionality of the prototype is satisfactory.  Hence, this project successfully converts the stamping process from a manual system to an automated system.

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Borsetto, Francesca, Andrea Ghiotti, and Stefania Bruschi. "Investigation of the High Strength Steel Al-Si Coating during Hot Stamping Operations." Key Engineering Materials 410-411 (March 2009): 289–96. http://dx.doi.org/10.4028/www.scientific.net/kem.410-411.289.

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To improve the low formability that HSS sheets exhibit at room temperature, innovative forming technologies like the hot stamping process are currently applied. In order to avoid scaling and decarburization during the heating step, metal sheets coated with a specially developed Al-Si coating are utilized. In the present work the coating characteristics in terms of morphology, surface roughness and tribological behaviour are investigated as function of heating temperature, holding time and cooling rate that are typical of hot stamping processes.

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Lee, Sang Hoon. "Fatigue Analysis of Stripper Bolt Under Combined Loading for Improvement of Stamping Die Design." Journal of Vibration and Acoustics 108, no. 2 (1986): 222–29. http://dx.doi.org/10.1115/1.3269328.

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A common problem of fatigue failure of stamping dies was experienced during the stamping operation with socket-head screws. In order to establish a design standard for the stripper bolt, a methodology for determination of the loads and the fatigue strength of the stripper bolt was developed. Stresses due to an impulsive load and a rectangular pulse were calculated based on a simplified spring mass system and the appropriate corrections were made to elaborate the solution. This approximate solution was validated by a finite element analysis. The stripper bolt should have an infinite fatigue life to survive a half million stamping operations. The fatigue problem involves a stress concentration with combined mean and alternating stresses. The Gerber parabola and the residual stress method were employed to treat the combined loading and the stress concentration. In order to enhance the fatigue life of the stripper bolt, a cushion is introduced at the surface where an impact load is applied. The cushion is found very effective in improving the fatigue life of the stripper bolt. An interactive computer program was developed as a tool for designing stamping dies.

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Sun, Ling, Jian Wei Xing, and Wu Hua Cheng. "Numerical Simulation and Verification of Multi-Operation Sheet Forming Process for Stamping Parts of Spiral Step Surface." Advanced Materials Research 189-193 (February 2011): 2911–16. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2911.

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On the basis of in-depth simulation analysis of stress and strain, thickness and forming limit changes in the property sphere during the drawing process for the stamping part of the spiral step surface, combined with the comprehensive simulation analysis of flanging, punching and other operations for the parts, it is concluded that the most obvious non-uniform changes of sheet thickness occur in the drawing process and then in the flanging process. The possibility and the distribution of tension fracture in ironing and wrinkles in thickening has been predicted and the production feasibility of low-cost drawing process without the blank holder and multi-operation forming process for stamping parts of spiral step surface. The validity of multi-operation numerical simulation results has been verified by the actual measurement of finished product rate and product thickness in trial production.

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Do, Anh Tu, and Aleksey Vladimirovich Chernyaev. "The Double-Sided Upsetting of the End Thickenings on Rod Blanks." Strojniški vestnik - Journal of Mechanical Engineering 70, no. 5-6 (2024): 223–30. http://dx.doi.org/10.5545/sv-jme.2023.550.

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The known methods for the plastic shaping of axisymmetric parts with bilateral end thickenings and the die equipment used for their application have several significant drawbacks, which may reduce the quality of manufactured products, increase their cost, and limit the technological capabilities of production. As a rule, they provide alternate plastic shaping of end thickenings. In this paper, we propose a method of simultaneous stamping of end thickenings on a bar stock in split dies and a stamping device for its implementation. To establish the power modes of stamping we carried out the simulation of the process under study using the finite element method in the QForm software package. The dependencies of the stamping force on the geometric dimensions of the workpiece and friction conditions on the contact surfaces are established. The damageability of the workpiece material made of AA5056 alloy was assessed, and a diagram was obtained to determine the number of required stamping operations.

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Myshechkin, A. A., I. N. Kravchenko, E. V. Preobrazhenskaya, V. V. Zuev, and S. V. Skripnik. "Development of a technological process for hot volume stamping of forgings using digital modeling." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 8 (December 12, 2024): 62–68. https://doi.org/10.17073/1683-4518-2024-8-62-68.

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A new technological process for manufacturing forgings with deep cavities using the hot stamping method is proposed, which makes it possible to reduce heating and specific forces on the tool and increase its durability. The developed technology includes the operations of upsetting the initial blank, hot stamping the outer profile of the resulting forging, extruding the inner cavity of the mandrel and open stamping the rear conical section of the mandrel. To increase the tool life after hot stamping of the outer profile, it is proposed to pre-extrude the inner cavity of the mandrel with increased dimensions, and then perform the final formation of the inner cavity and the rear conical section of the mandrel. To select the parameters of the developed process, a study of technological transitions was conducted using the digital modeling method in the QForm program. The parameters of blank shaping, stress-strain state and technological forces of stamping transitions are determined.

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R. Gopalakrishnan, S. Aneesh, K. Chandra mouli, and S. Logeshkumar. "Modular Industrial Labeling and Stamping System with Conveyor Integration Using PLC Controller." International Research Journal on Advanced Engineering Hub (IRJAEH) 3, no. 03 (2025): 760–67. https://doi.org/10.47392/irjaeh.2025.0106.

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The Stamping system for the industrial purpose offers a complete solution to streamline labeling and stamping tasks in industrial environments. By combining automated label application, stamping, and inspection, it guarantees top-notch quality, cuts down on labor costs, and boosts productivity. The PLC controller provides precise monitoring and control, enabling real-time adjustments and reducing downtime. The system's modular design makes it easy to customize and expand, allowing businesses to adapt to different product lines and production needs. It's especially ideal for industries with high-volume labeling and stamping demands, like manufacturing, pharmaceuticals, and food processing. With its advanced capabilities and adaptability, the system helps companies improve product quality, lower expenses, and stay competitive. By simplifying these operations, businesses can focus on what matters most, driving growth and achieving excellence.

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Qian, Boqiang, Papia Sultana, Ping-Ju Chen, Glennys Mensing, and Placid Ferreira. "Stamping colors with solid-state superionic stamping (S4)." Journal of Manufacturing Processes 79 (July 2022): 305–13. http://dx.doi.org/10.1016/j.jmapro.2022.04.032.

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Chin, Kwai-Sang, and Dunbing Tang. "Web-Based Concurrent Stamping Part and Die Development." Concurrent Engineering 10, no. 3 (2002): 213–28. http://dx.doi.org/10.1177/106329302761689133.

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The Internet and World Wide Web (WWW) are evolving as an important communication technology. This paper aims to develop methodology for enabling better concurrent stamping part and die development, in the evolving Web technology. The characteristics of concurrent stamping part and die design are presented, and the necessity and feasibility of building Web-based concurrent stamping part and die development system is then discussed. Next, the overall architecture of Web-based concurrent stamping part and die design and development is established. The design services, which are the components of the Web server and play key roles in implementing the Web-based concurrent stamping part and die development, are then investigated in depth. Among the Web-based design services, the part shape analysis and feature-based cost evaluation are further illustrated in detail. While the system development approach including knowledge-based stamping part design and evaluation over Web is discussed, the cooperation and coordination between product designer and die designer are also presented with the illustration of a case study. The findings of this research allow the stamping part designer and the die designer to share product data, communicate with each other, and maintain operations consistency in the distributed cooperative sites on different product design and development platforms.

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Kasim, Nazrul Idzham, Akhtar Razul Razali, and Mohd Azam Musa. "Positional Accuracy Based on a Load Identification Optimization on a Linear Motor Sheet Forming Feeder." Applied Mechanics and Materials 680 (October 2014): 311–14. http://dx.doi.org/10.4028/www.scientific.net/amm.680.311.

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Precision feeding is essential for micro-stamping, especially in multi-stage progressive forming operations, where necessary feeding rates also have to be maintained. Research in micro-stamping of thinner sheet metals (<100 microns) led to investigations of the performance of existing sheet-metal feeders, regarding their accuracy and repeatability in high speed micro-stamping. The results indicated that the pursuance of higher feeding accuracy and repeatability which aimed at 5-15% of the strip thickness was unachievable with the existing micro-feeders. A new high-precision and high-speed feeder was, therefore, developed for micro-sheet-forming. Initial non-optimized experimental results had showed high accuracy and repeatability were achieved.

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Sah, Sripati, and Robert X. Gao. "Process monitoring in stamping operations through tooling integrated sensing." Journal of Manufacturing Systems 27, no. 3 (2008): 123–29. http://dx.doi.org/10.1016/j.jmsy.2008.11.001.

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Borsetto, Francesca, Andrea Ghiotti, Stefania Bruschi, T. Stoehr, J. Lechler, and Marion Merklein. "Interlaboratory Comparison of Friction Conditions in Hot Stamping Operations." Key Engineering Materials 438 (May 2010): 97–105. http://dx.doi.org/10.4028/www.scientific.net/kem.438.97.

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The paper presents results obtained at two labs, on in Germany and one in Italy, in terms of friction coefficient as function of hot stamping process parameters. Even if the testing procedures and analysis tools to evaluate tribological conditions are different for the two labs, both the approaches show a similar trend as regards the friction coefficient dependence from the process parameters.

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Dang Anh Tuan. "Application of the double crank mechanism in designing complex-stroke press." Journal of Military Science and Technology, FEE (December 10, 2023): 149–56. http://dx.doi.org/10.54939/1859-1043.j.mst.fee.2023.149-156.

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Although having a development history of over 200 years, researches and developments about press machines are still draw interest of modern mechanical engineering. This paper introduces a new press structure that utilizes a double crank mechanism to enhance productivity and efficiency for the stamping process. By adjusting the positions between the component links, the dynamic characteristic of the ram can be modified, optimizing the performance and improving operations of the system. The proposed design also allows for easy adjustments to adapt with different production requirements, such as changing forging and stamping speeds (fast and slow) to avoid the impact of springback properties in sheet metal. The kinematics of the structure have also been determined by mathematic equations, demonstrating significant improvements in the operation of the ram. Results from the research offers a promising solution to enhance production efficiency and enable the creation of simple yet capable mechanisms to perform complex operation.

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Kalyuzhniy, Volodymyr, Oleksandr Yarmolenko, and Kostyantyn Marchuk. "Stamping a medium – sized cartridge blank from low – carbon steel." Mechanics and Advanced Technologies 5, no. 1 (2021): 113–21. http://dx.doi.org/10.20535/2521-1943.2021.5.1.234466.

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The work is devoted to obtaining a medium – sized cartridge blank from low-carbon steel. The sequence of punching transitions includes a hot back- extrusion operation, two cold draw – thinning operations, and a cold crimp operation. Modeling using the finite element method established: efforts and specific forces during operations, thermal effect during shaping, shape and size of semi – finished products with distributions of strain intensity. An elastoplastic metal model was used, which made it possible to reveal the forces of extracting the tool from deformed semifinished products and the forces of removing semifinished products from the matrix. A hollow semifinished product with the required dimensions of a protrusion on the bottom part from the side of the cavity and a protrusion on the end for forming a flange is obtained by reverse extrusion. The possibility of carrying out the first drawing operation with thinning through three sequentially located matrixes is shown. After this operation, annealing of the semi-finished product is required to restore plasticity. In the second operation of drawing with thinning and additional stamping of the bottom part, the final dimensions of this part from the side of the cavity and the shaping of the flange on the lateral surface of the semi-finished product are provided with the creation of a macrostructure to ensure the required operational properties. The shape and dimensions of the wall of the semi-finished product after the second drawing, the distribution of the intensity of deformations in it are determined from the condition of reaching the final dimensions and mechanical properties of the cartridge blank at the last crimping operation. For this, the deformations obtained as a result of the second drawing are taken into account when modeling the crimp. The proposed technology for stamping a blank of a sleeve can be implemented on a universal press – forging equipment, has a high productivity and minimizes mechanical processing.

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Dodd, Nathan, Russell Goodall, Erica Ballantyne, and Graeme Heron. "Modelled optimisation approaches for laser cutting sheets simultaneously applied to EV component production." PLOS ONE 17, no. 10 (2022): e0275966. http://dx.doi.org/10.1371/journal.pone.0275966.

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This paper proposes that laser cutting has potential as a viable alternative to stamping for mass manufacture of thin steel components such as stator and rotor components in the electric automotive sector. Current laser cutting processes are much less efficient than stamping. However, laser cutting is much more flexible and is used for small batches and one-off production. This paper assesses the potential of performing laser cutting operations of multiple sheets or layers simultaneously. This method is referred to herein as polystromata cutting. A numerical model is used to assess the manufacturing performance of stamping, traditional laser cutting and polystromata laser cutting. Polystromata laser cutting is shown to be capable of producing parts at 37% less cost than stamping. However, polystromata remains slower than stamping, taking 79% more time to produce each stator stack. Through this research it has been identified that optimisation of polystromata processes is more complex and performance efficiency varies wildly dependent on manufacturing set-up. This work aims to provide a best practice optimisation methodology for polystromata laser cutting by assessing results using different manufacturing objectives.

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Rmathavan Nair, Maanoj Nair, Kai Jie Low, Kai Liang Lew, Iksan Bukhori, Suleiman Aliyu Babale, and Lee Shyan Chia. "Review and Analysis of Mechanical Cutting Tools for Rubber Stamping." International Journal on Robotics, Automation and Sciences 6, no. 2 (2024): 84–91. http://dx.doi.org/10.33093/ijoras.2024.6.2.12.

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Rubber industry is one of the major industries in Malaysia. Rubber stamping machine is a machine that cuts rubber sheets into desired shapes and dimensions, facing challenges due to the elastic properties of rubber sheets. These challenges include long process time and non-identical dimension. This review paper focuses on the design of the rubber-stamping machine to address the challenges by reducing process time and producing identical dimensions products. The rubber-stamping machine was fabricated, and analysis was performed to verify its efficiency. The core of the designs is to ensure the user safety, friendliness, and increase productivity and product consistency. Based on the findings from existing studies, the review highlights significant improvements in machine design and operational efficiency. The paper also discusses the impact of these innovations on the competitiveness of rubber stamping operations and provides insights into future directions for research in mechanical design and automation systems. This review can be a crucial resource for developers and manufacturers looking to enhance the efficiency and product quality of rubber-stamping machines, contributing to the advancement of manufacturing practices in the rubber industry.

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Hong, Myoung-Pyo. "Hot Stamping Parts Shear Mold Manufacturing via Metal Additive Manufacturing." Applied Sciences 12, no. 3 (2022): 1158. http://dx.doi.org/10.3390/app12031158.

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Hot stamping uses boron (B) steel to simultaneously form parts at high temperatures while cooling the parts in a mold, which is advantageous because of the ability to freeze the forms. However, compared to conventional cold forming, this technique requires additional facilities that include heating devices and additional time for cooling after forming at high temperatures. Additionally, because of the high strengths of hot stamping parts, shear process operations after molding tend to be difficult to perform as a continuous operation via press processing; thus, most operations depend on separate laser processing, which results in lower productivity and increased manufacturing costs. This limitation continues to be the most significant problem with this technology, therefore, restricting its commercialization because of increased mold manufacturing costs and durability problems. This study investigated a low-cost, high-functionality shear mold manufacturing method for 1.5 GPa grade hot-stamped components using heterogeneous metal additive manufacturing. After the concentrated stress in steel during the shearing processes was analyzed using a multi-physical analysis, metal additive manufacturing was used to fabricate the shear mold. Its life was evaluated through trial molding and compared with that for conventional technology. Finally, the commercialization potential of the newly developed method was assessed.

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Remshev, Evgeny, Zainudin Rasulov, Sergey Voinash, et al. "The Evaluation Effect of the Active Lubricating Coating on the Mechanical Properties of Stamped Semi-Finished Products Made of Refractory Metals." Materials Science Forum 1049 (January 11, 2022): 3–10. http://dx.doi.org/10.4028/www.scientific.net/msf.1049.3.

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We investigated the possibility of using an organofluorine coating on parts of the "Screen" type made by cold stamping from refractory metals, in particular niobium. The paper also presents the results of a study of the mechanical characteristics of samples with acoustic-emission accompaniment and the hardness values before and after applying the organofluorine composition. The surface of parts with and without coating after convolution is studied. It is shown that it is possible to prevent loss of stability during the first operation of the technological process, as well as to reduce the number of operations by eliminating annealing between subsequent operations of drawing with thinning.

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Behrens, B., S. Hübner, S. Yarcu, et al. "Erzeugung duktiler Bereiche beim Formhärten*/Production of ductile areas in hot stamping – Creating areas with reduced strength using a tempering station." wt Werkstattstechnik online 109, no. 10 (2019): 750–54. http://dx.doi.org/10.37544/1436-4980-2019-10-54.

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Formgehärtete Bauteile sind aufgrund ihres Leichtbaupotenzials im Karosseriebau etabliert. Jedoch ist die mechanische und thermische Fügbarkeit aufgrund der hohen Festigkeit stark eingeschränkt. Ein Ansatz zur Verbesserung der Fügeeigenschaften ist die Erzeugung von weichen Fügezonen. Zur gezielten Einstellung von lokal angepassten mechanischen Eigenschaften beim Formhärten wurde daher eine dem Platinenerwärmungsprozess nachgeschaltete Temperierungsstation entwickelt, um Platinen vor dem eigentlichen Formhärten im Hinblick auf eine lokale Entfestigung zu temperieren. &nbsp; Due to their lightweight, hot-stamped components are established in car body manufacturing. However, high strength limits the application of mechanical and thermal joining operations. One approach to improving the joining properties is the production of ductile joining areas. To achieve locally varying mechanical properties, a tempering station has been developed that is suited to locally adapt the blank temperatures right after the oven process and thus prior to the hot stamping, resulting in tailored mechanical properties after the hot stamping operation.

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Shenberger, P. N. "SPECIAL CHARACTERISTICS OF THE DEFORMING MECHANISM DURING STAMPING SHEARING OPERATIONS." Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta, no. 2 (2018): 53–60. http://dx.doi.org/10.18323/2073-5073-2018-2-53-60.

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Caglar Gencosman, Burcu, Mehmet A. Begen, Huseyin Cenk Ozmutlu, and Imren Ozturk Yilmaz. "Scheduling Methods for Efficient Stamping Operations at an Automotive Company." Production and Operations Management 25, no. 11 (2016): 1902–18. http://dx.doi.org/10.1111/poms.12584.

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Ge, M., G. C. Zhang, R. Du, and Y. Xu. "Feature Extraction From Energy Distribution of Stamping Processes Using Wavelet Transform." Journal of Vibration and Control 8, no. 7 (2002): 1023–32. http://dx.doi.org/10.1177/107754602029577.

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As one of the most commonly used manufacturing processes, stamping operations are applied to an extended range from centimeter-class parts to meter-class parts. The demand for the quality and productivity of stamping products is ever increasing. Hence, the extraction of the appropriate feature to implement on-line monitoring has been attempted. The vibration signals provide rich information for finding the dynamic behavior at high frequency vibration of the press. In this paper, an accelerometer has been employed in place of tonnage sensors or strain gauges to monitor the stamping process. In order to characterize the transient signal of the process, this work extracts the energy densities and frequency band energy (FBE) from the vibration signal. Owing to its inherent properties, the wavelet packet transformation decomposes the original signal into basis functions, with different energy distributions dominating in different time-frequency bands. Based on the experimental results, this suggests that extracting FBE from a vibration signal using a wavelet packet as a feature for fault diagnosis can, in practice be an effective approach for stamping process monitoring.

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Bin Qian, Bin Qian, Yi Luo Bin Qian, Jiaxiang Ou Yi Luo, Yong Xiao Jiaxiang Ou, and Houpeng Hu Yong Xiao. "IoETTS: A Decentralized Blockchain-based Trusted Time-stamping Scheme for Internet of Energy." 網際網路技術學刊 24, no. 2 (2023): 531–38. http://dx.doi.org/10.53106/160792642023032402027.

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As a new-style smart grid, Internet of Energy (IoE) is important and how to provide its trusted time-stamping service becomes a hit. For example, an energy provider needs to prove he/she transferred some energy to a consumer at some time. Nevertheless, traditional trusted time-stamping scheme with a central service provider is not suitable for IoE. Some researchers try to solve this problem via blockchain, due to its decentralization, traceability and tamper-proof. However, there are still chal&shy;lenges when using blockchain. Some have to introduce another kind of central participant. Some have to face the problem of accuracy and availability when using the Bitcoin blockchain. Some have to generate too many extra transactions. To address the aforementioned problems, we propose a fully decentralized trusted time-stamping scheme without any central participant and fulfill six design goals. Compared with the state-of-the-art blockchain-based time-stamping scheme named Chronos, our scheme enjoys less cryptographic operations. We then tested our scheme in the development (local) network and two live networks of the Ethereum. The experiment shows that we have implemented a simple, effective, accurate and low-cost decentralized trusted time-stamping scheme. &nbsp;

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Hwang, Po-Wen, Yuan-Jen Chang, Hsieh-Chih Tsai, Yu-Ta Tu, and Hung-Pin Yang. "Comparison and Optimization of Generalized Stamping Machine Fault Diagnosis Models Using Various Transfer Learning Methodologies." Sensors 25, no. 6 (2025): 1779. https://doi.org/10.3390/s25061779.

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The integration of artificial intelligence (AI) with stamping technology has become increasingly critical in smart manufacturing, driven by advancements in both fields. Total clearance, a crucial determinant of both process and product quality in stamping operations, significantly impacts cutting precision, material deformation, and the longevity of stamping equipment. Consequently, real-time monitoring and prediction of total clearance are essential for effective process control and fault diagnosis. However, the heterogeneity of stamping machine designs necessitates the development of numerous machine-specific models, posing a significant challenge for practical implementation. This research addresses this challenge by developing a generalized fault diagnosis model applicable across multiple stamping machine types. Specifically, the model is designed to monitor four distinct machine models: OCP-110, G2-110, G2-160, and ST1-110. Vibration data, acquired using accelerometers strategically placed at two distinct sensor locations on each machine, serve as the primary input for the model. Four prominent deep learning architectures—a 10-layer convolutional neural network (CNN), a CNN with residual connections (CNN-Res), VGG16, and ResNet50—were rigorously evaluated in conjunction with fine-tuning strategies to determine the optimal model architecture. The resulting generalized fault diagnosis model achieved an average accuracy, recall rate, and F1 score exceeding 99%, demonstrating its efficacy and reliability for real-world applications. This proposed approach offers the potential for scalability to additional stamping machine types and operational conditions, thereby streamlining the deployment of predictive maintenance systems by equipment manufacturers.

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Liu, Chin-Wei, Shyong Lee, Dean Chou, Shu-Han Hsu, and Chun Lin Chu. "Dimensional accuracy in quick plastic forming of aluminum alloy using demolding mechanism." Advances in Mechanical Engineering 13, no. 6 (2021): 168781402110217. http://dx.doi.org/10.1177/16878140211021731.

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This study focuses on quick plastic forming (QPF), product dimensional tolerances, and removal methods. The traditional curled metal shell mold in QFP, has limitations such as long process time and unstable quality. Therefore, this investigation designed a demolding mechanism, in order to improve the process efficiency and dimensional accuracy of QPF, in the manufacture of metal casings. The research results show that the proposed mechanism can significantly decrease the process time, because it replaces most of the operations of specimens movement after forming completely. The shorter process time reduce the die temperature loss during operation, thus also improving the efficiency by eliminating the need to wait for the die to return to its operation temperature. In terms of dimensional tolerance, the tolerance grade of QPF process was determined using the standard deviation, and found to be between IT10 and IT14. This range covers the scope of CNC cutting and stamping processing, indicating that the process has commercial value in the production of metal casings, because the current mainstream manufacturing process of metal casings comprises casting, stamping and CNC machining.

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Antsifirov, A. A., and V. A. Krivoshein. "Selection of the optimal hydraulic drive for the press." Glavnyj mekhanik (Chief Mechanic), no. 7 (June 11, 2021): 50–60. http://dx.doi.org/10.33920/pro-2-2107-05.

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The research presented in the article is devoted to the selection of the electric motor of the hydraulic press drive with a nominal force of 5MN. The article presents the main characteristics and the description of the press operation using the means of mechanization of the technological process of pressure treatment. Using the Deform-3D software package, the process of stamping the crosspiece of the ZIL-130 cardan shaft was simulated. Based on the presented hydraulic scheme of the press, its topological model was formed in the PA-9 software package. The deformation force obtained in the course of modeling the technological process of stamping was used in the topological model of the press. Using a tabular cyclogram, the sequence of actuation of the end switches and hydraulic distributors during the stamping process is shown. In the article, two variants of engine operation were analyzed. Based on the results of the conducted research, it is necessary to focus on the second version of the 55 kW engine, the operation of which will provide the required characteristics of the hydraulic drive of the press, which in turn will allow for technological stamping operations. The simulation tools allow providing estimated information when selecting the necessary tools to ensure the optimal characteristics of hydraulic press drives. The article considered the variation of electric motors that differ from each other in nominal characteristics, with constant characteristics of the pump. For more accurate estimates of energy savings during the operation of the hydraulic drive, it is necessary to vary the characteristics of the pump in the simulation, and the best option is to form an experiment planning matrix when combining the characteristics of the electric motor and the hydraulic pump. This approach ultimately allows forming a function for which one can select a hydraulic drive from existing brands of electric motors and hydraulic pumps for presses of the corresponding range of nominal force.

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Dubynyak, Taras, Volodymyr Nevozhai, Andrii Remez, Mykola Poshyvak, and Petro Mykulyk. "Formation of reflective shells by electric arc spraying and application of composite material to the punch." Scientific journal of the Ternopil national technical university 114, no. 2 (2024): 119–34. http://dx.doi.org/10.33108/visnyk_tntu2024.02.119.

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In the course of the work, the process of forming reflective shells and finding the position of grid elements after deformation was investigated. Fixation of mesh nodes by electric arc spraying. After that, a composite material such as polystyrene is applied to form reflective shells. Minimization of potential energy is carried out numerically by an iterative method. The result of the work is the formation of the antenna array shell by the method of electric arc spraying and the application of the composite material. The following forming operations of sheet metal stamping are known: drawing, rotary drawing, relief forming, trimming, including rubber and liquid drawing, hydromechanical drawing, explosion drawing, electric discharge stamping, electromagnetic stamping, hydropneumatic drawing, which allow to obtain a shell from sheet material (solid or gas and water permeable) by pressing it against a die or punch with a transfer medium.

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Temis, J. M., A. P. Khudyakov, and A. V. Cherednichenko. "Definition of optimum parameters of workpieces and superplastic forming and isothermal stamping operations for the manufacturing of thin-walled details of gas-turbine engines." Izvestiya MGTU MAMI 9, no. 3-4 (2015): 16–25. http://dx.doi.org/10.17816/2074-0530-67089.

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The technique of mathematical simulation of isothermal stamping and superplastic molding for determination of optimum parameters of work pieces and manufacturing operations is presented. Application of the technique for thinwalled case and hollow vane manufacturing are shown.

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Stancioiu, Alin, and Liliana Luca. "Researches on the Wear of the Stamped Punches Heat Treated Differently Using the Method of Deviation from Circularity." Applied Mechanics and Materials 657 (October 2014): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amm.657.116.

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This paper presents the results of some research with different heat treatments for the steel OSC10 compared to steel 205Cr115 of which have made the cut punches, each one realizing 16,000 stampings in the same technology. A study was done on the wear of used tools stamping operations using the method of deviation from circularity. Due to the fact that the material of workpiece sheet has fibers orientated in the direction of lamination the cutting tools encounters resistance in a different manner on their circumference. In some portions the edges penetrate perpendicularly to the fiber, the cutting material poses a higher resistance and obtains more pronounced wear of the edges. On the other portions, the edges penetrate parallel with the fiber, in this case the material strength is low and provides a wear less pronounced.

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Кухар, В. В., Є. А. Фролов та С. Г. Ясько. "ТЕХНОЛОГІЧНІ АСПЕКТИ ЗАБЕЗПЕЧЕННЯ ЯКОСТІ ДЕТАЛЕЙ ПРИ ПНЕВМОУДАРНОМУ ШТАМПУВАННІ ВИРУБУВАННЯМ-ПРОБИВАННЯМ". Open Information and Computer Integrated Technologies, № 87 (30 червня 2020): 137–50. http://dx.doi.org/10.32620/oikit.2020.87.07.

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The paper considers the issues related with technological capabilities and features of the process of cutting-punching of sheet-metal parts with an elastic medium of pneumatic impact stamping, taking into account the indicators of their quality and accuracy, and also suggests effective ways to improve them. One of the promising methods for producing high-precision parts, including those with a complex profile, is a shaping method based on the technology and equipment of pneumatic shock stamping with an elastic medium on the TA-1324 in-stallations. The advantages of this method are environmental cleanliness, safe operation, wide technological capabilities, mobility and versatility, low labour and energy costs. At these installations it is advisable to perform formative operations of separation (cutting-punching) and shallow shaping both as a separate operation and together with cutting-punching. As a workpiece for the study the sheet material of the following grades was used: steel 08kp, aluminium alloy AMG-M, steel 12X18H10T. The thickness varied within the range from 0.5 to 2.5 mm. Dies and copier punches were made of U8A steel, followed by heat treatment to a hardness of HRC 56-62. An analysis of the experimental studies of punching-cutting processes allows us to conclude that with an increase in the number of stamped parts, there is an increase in size deviations from their nominal values. This increase is due to the wear of operating elements (copier punches and dies). At the same time, the sizes of the copier punches are reduced, and the sizes of the matrices are increased. The absolute values of deviations do not depend on the type of operations; their values, both during cutting and punching, are almost the same in each of the samples taken. The process of pneumatic impact stamping, where a hammer with a bevelled end was used, has a similar character. The paper also proposed and tested ways to improve pneumatic impact stamping, providing cutting, punching of parts from sheet copper, aluminium alloys with a thickness of 0.3 to 3 mm and mild steel up to 3 mm thick. The roughness of the cutting surface is in the range Ra = 0.3 to 0.6 μm, and in the case of high-strength materials up to 2.5 mm thick, the roughness of the cutting surface is Ra = 0.6 to 1.0 μm, depending on the contour configuration that is cut down or punched.

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Kwapisz, M., M. Knapiński, H. Dyja, and A. Kawałek. "Analysis of the Alternate Extrusion and Multiaxial Compression Process." Archives of Metallurgy and Materials 60, no. 1 (2015): 149–52. http://dx.doi.org/10.1515/amm-2015-0023.

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Abstract The paper present the results of numerical simulations of the alternate indirect extrusion and multiaxial compression process, performed using commercial software designed for the thermomechanical analysis of plastic working processes, Forge 2009. The novel method of alternate indirect extrusion and multiaxial compression, proposed by the authors, is characterized by the occurrence of strain states in the material being plastically worked, which are similar to those occurring in the equal channel angular pressing and cyclic extrusion compression processes. It can be found from preliminary studies carried out that the two alternate operations, i.e. extrusion and multiaxial compression, result in a strain accumulation and the formation of a strain state particularly favourable to grain refinement. As shown by preliminary numerical studies performed by the authors, a zone of large plastic strains forms at the lateral side of the stamping during extrusion of material, which gradually fades along the stamping axis direction. After the multiaxial compression operation, when the material has been brought again to its original shape, the large strains zone moves and then settles in the form of a torus under the stamp. The subsequent extrusion process results in the formation of a new large strains zone being located at the lateral stamping side, and, at the same time, the displacement of the previously deformed material towards its axis. Repeating the above operations many times should bring about large magnitudes of homogeneous deformation within the entire volume of the material examined. The main problem during carrying out practical tests will be to determine the optimal shapes of dies and stamps, which would assure the intended strain state to be obtained in the material, and would also prevent the buckling and overlaps of the material during multiaxial compression.

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Groche, P., S. Köhler, and S. Kern. "Stamping of stringer sheets." Journal of Manufacturing Processes 36 (December 2018): 319–29. http://dx.doi.org/10.1016/j.jmapro.2018.10.025.

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Lovell, M., C. F. Higgs, P. Deshmukh, and A. Mobley. "Increasing formability in sheet metal stamping operations using environmentally friendly lubricants." Journal of Materials Processing Technology 177, no. 1-3 (2006): 87–90. http://dx.doi.org/10.1016/j.jmatprotec.2006.04.045.

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Sah, Sripati, and Robert X. Gao. "An experimental study of contact pressure distribution in panel stamping operations." International Journal of Advanced Manufacturing Technology 55, no. 1-4 (2010): 121–32. http://dx.doi.org/10.1007/s00170-010-3050-3.

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Skardžius, Juras, and Justinas Gargasas. "Alternative Real-Time Part Quality Monitoring Method by Using Stamping Force in Progressive Stamping Process." Journal of Manufacturing and Materials Processing 9, no. 4 (2025): 104. https://doi.org/10.3390/jmmp9040104.

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The manufacture of automotive parts using progressive stamping tools demands high precision and efficiency to meet industry standards. This research explores integrating quality monitoring techniques, focusing on load sensors and tonnage monitoring, to enhance the production process. Progressive tools, which perform multiple operations within a single press cycle, are critical for maintaining dimensional accuracy and minimizing defects. This research examines the correlation between real-time load sensor data and the tonnage applied during stamping, aiming to detect anomalies and deviations that may define part quality. By analyzing variations in tool loads and press tonnage, this research identifies patterns that allow the user to connect the applied force with the observed part quality and could help to determine potential issues such as instability of force or part dimensions, tool wear or improper alignment. The results of this research demonstrate that incorporating advanced monitoring systems into progressive stamping processes does not only improve part quality but also extends tool life and reduces downtime. The proposed approach provides a robust framework for ensuring reliability and efficiency in the production of automotive components, aligning with the industry demand for high-quality, cost-effective manufacturing solutions.

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Popa-Burke, Ioana, Brian Lupotsky, Joseph Boyer, et al. "Establishing Quality Assurance Criteria for Serial Dilution Operations on Liquid-Handling Equipment." Journal of Biomolecular Screening 14, no. 8 (2009): 1017–30. http://dx.doi.org/10.1177/1087057109339938.

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Since the advent of high-throughput screening (HTS) in the early 1990s, parallel multichannel liquid handlers have become a mainstay in every drug discovery setting. Although several peer-reviewed publications have discussed methods and criteria for stamping multiwell copies, there is very little information about establishing a standard operating procedure (SOP) for standard (microliter-level) serial dilutions of compounds used in dose-response experiments. The authors discuss the 4 main criteria any serial dilution process must pass (accuracy, precision, fold dilution, and outliers) and the process for establishing thresholds for all of these values in a compound management or biological screening laboratory. The thresholds need to be both low enough to be acceptable from a biological potency variability perspective and high enough to allow the instruments to pass the quality assurance (QA) analysis on a regular basis. In this article, the authors suggest suitable thresholds arrived at by a variety of methods, including trend analysis of QA data, survey questionnaire from the main stakeholders (screening scientists, chemists), and published criteria for single-shot stamping. A mathematical analysis of the effect of threshold values on estimated XC50s was performed to ensure that the variability introduced by the serial dilution step is within acceptable overall variability limits.

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Tang, Dunbing, and Benhe Gao. "Feature-based metal stamping part and process design. Part II: stamping process planning." International Journal of Production Research 45, no. 13 (2007): 2997–3015. http://dx.doi.org/10.1080/00207540600693556.

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Simoncini, Michela, Lorenzo Panaccio, and Archimede Forcellese. "Bending and Stamping Processes of FSWed Thin Sheets in AA1050 Alloy." Key Engineering Materials 622-623 (September 2014): 459–66. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.459.

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The present investigation aims at studying post-welding forming operations of friction stir welded AA1050 aluminium thin sheets. A preliminary investigation has allowed to define the rotational and welding speed values leading to friction stir welded joints with high mechanical properties. Then, formability and elastic springback were evaluated using the hemispherical punch and bending tests, respectively. A microstructural investigation has allowed to relate the mechanical properties of joints to microstructure. Finally, the friction stir welded assemblies were subjected to air bending and stamping experiments in order to evaluate their attitude to undergo to sheet metal forming operations.

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Ge, Rui, An Long, and Yin Chen. "Effect of Heating Parameters on the Part’s Properties in Hot Stamping Process." Advanced Materials Research 557-559 (July 2012): 2417–22. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.2417.

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In the automotive industry, the hot forming of high strength steels offers the possibility to obtain significant reduction of weight without affecting the structural performances of final products. Compared with conventional sheet metal forming, the proper design of hot stamping process chain requires the deep knowledge of both interface phenomena and material behavior at high temperatures in order to obtain the desired properties of final products in terms of microstructure and strength characteristics. The work presented in this paper aims at accurately evaluate the effect of heating parameters on the properties of final sheet components produced in hot forming operations. Different from that in the lab, all the samples and parts used for the experimental test were produced in the production line, which can objectively show the manufacturing properties and microstructure character of products in mass. Microstructure evaluation, hardness measurement and dimensional accuracy test after hot stamping were performed and considered. The best heating parameters for the researched hot stamping B-Pillar’s production were obtained through the above research.

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Zhang, W. Z., R. D. Jiang, B. T. Cheok, and A. Y. C. Nee. "An innovative and practical design automation system for progressive dies." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 12 (2002): 1611–19. http://dx.doi.org/10.1243/095440502321016341.

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This paper describes an innovative approach for the design automation of progressive dies. The die design is modelled as a process to design its die functions. A template concept used to realize the die structure for a die function is proposed in the paper. A user begins by defining the geometric and stamping features of a sheet metal part. The geometric and feature information is processed and stored in a knowledge-based system. After automatic unfolding and nesting operations, the stamping process is interactively staged. Thereafter, a model-based approach takes over and generates the knowledge-based description of the die. Using special semantics to describe the die topology and assembly relations, a three-dimensional solid model of the entire die assembly is generated from the die description knowledge base. This system is able to produce three-dimensional strip layout, three-dimensional die components and assembly, and annotated two-dimensional production drawings. It significantly improves stamping die design productivity and accuracy, which is achieved through the capturing and processing of die design knowledge.

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Ceglarek, D., H. F. Li, and Y. Tang. "Modeling and Optimization of End Effector Layout for Handling Compliant Sheet Metal Parts." Journal of Manufacturing Science and Engineering 123, no. 3 (2000): 473–80. http://dx.doi.org/10.1115/1.1366682.

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Material handling of compliant parts is one of the most critical and underresearched problems in the sheet metal stamping industry. The fundamental shortcoming of currently studied material handling systems for sheet metal stamping is the lack of analysis of its impact on part dimensional quality and production throughput. This paper addresses this problem by development of a generic methodology for modeling and optimization of part holding end-effector layout in order to minimize part dimensional deformation during handling operations. The methodology extends the design of “N-2-1” fixturing layout by adding part movability conditions. It considers part CAD model, handling direction and motion kinematic parameters to determine the best end effector layout. This methodology is realized by integrating FEM part and loading modeling with the optimization algorithm. It can be implemented into the design stage of a stamping line so that the trial and error process, which is current industrial practice, can be greatly shortened and the production throughput increased. Experimental results verify the proposed part holding end-effector layout methodology.

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Kaya, Ertuğrul, Daniele Farioli, and Matteo Strano. "FEA Approach for Wear and Damage Prediction of Tools for the Progressive Die Stamping of Steel Washers." Key Engineering Materials 926 (July 22, 2022): 1168–77. http://dx.doi.org/10.4028/p-15186x.

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In progressive die stamping processes, maintenance activities caused by tool damage, and wear represent economic losses for companies. An effective predictive maintenance strategy can only be implemented if maintenance data coming from the operations are correlated to specific process-related information. As a part of a more general data-based predictive maintenance strategy, the main causes of tool damage and wear in a progressive die stamping factory that produces automotive metal washers have been identified by means of FEA simulations. In this study, the progressive die stamping of a dented conical washer is simulated with Transvalor FORGE FEA software by implementing the process parameters used in a real case. In this study, two indicators called FEAwear and FEAdamage are proposed for prediction of die wear and damage for tools with high risk of failure. For validating the accuracy of the FEA simulations, dimension and geometry comparisons are performed between FEA and real washer, and then real and FEA maximum press force comparison is performed. In the end, FEA simulations demonstrated their accuracy in predicting the stamping force of the press and the final part quality, and proposed FEA damage and wear indicators accurately predicted the most critical tools and stations, as confirmed by the real maintenance data. Finally, the simulations also correctly detected potential damage zones of the tools.

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