Journal articles: 'Progressive stamping die'

1

Huang, Hong Hui, and Ling Yun Wang. "The Rapid Design System of Stamping Process Based on KBE." Applied Mechanics and Materials 347-350 (August 2013): 3460–64. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.3460.

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This paper takes UGNX6.0 as the development platform, by using its UG/KF development tools, fusing feature and knowledge together, so as to realize the process associated with the geometric design knowledge and stamping process design. Based on the features of stamping process, the classification of stamping process knowledge has been studied. With the object-oriented method, the rule-based and instance-based technology for expressing and acquiring the stamping process knowledge is discussed. Based on this, the stamping process model driven by knowledge has been established. It showed the importance of the CAD technology in designing of relatively complex progressive dies. Based on the knowledge engineering process designed, the degree of intelligence stampings process design has been enhanced, design quality and efficiency has been improved, and the dependence of the process design experience of designers has been reduced.

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Gao, Xian Hong, and Ming Qing Wu. "Profiled Hole Stamping Progressive Die Design." Applied Mechanics and Materials 416-417 (September 2013): 1889–92. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.1889.

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The material H62, thickness 4 mm, production batch to batch general blanking pieces quality analysis, to determine the cutting scheme, the design of progressive die. From the operation and locate mode, discharge and a way, the mold frame type and accuracy in the overall design analysis, and then to die, punch and other parts design and drawing die assembly drawing.

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Xia, Qin Xiang, Teng Xu, Guang Ming Wei, and Fu Yuan Ye. "Numerical Simulation and Experimental Research on Multi-Position Progressive Stamping Process of Automotive Structural Part." Applied Mechanics and Materials 271-272 (December 2012): 1366–71. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1366.

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Multi-position progressive stamping is widely used in industrial fields, such as electronic, automobile and appliance, etc. Finite element numerical simulation has been an effective method to analyze the deformation of multi-position progressive stamping, the progressive die with 13 positions for the high strength steel automotive soleplate component part was manufactured based on the FEA simulation results obtained by multi-position multi-operation modeling method, and the corresponding progressive stamping experiments were carried out. The experimental results of the forward deep drawing of position 3 were further compared with the simulation ones, the results conform well to each other.

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Liu, Yao Guo. "Car Progressive Stamping Molding Process Simulation and Process Optimization." Advanced Materials Research 971-973 (June 2014): 414–17. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.414.

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Based on the beam outside the front car plate , for example, to use DYNAFORM software for finite element analysis method to start the process of drawing molding method, the research body stamping design and formability analysis. Numerical simulation techniques for forming sheet metal stamping simulation .

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Duffey, Michael R., and Qiang Sun. "Knowledge-based design of progressive stamping dies." Journal of Materials Processing Technology 28, no. 1-2 (September 1991): 221–27. http://dx.doi.org/10.1016/0924-0136(91)90221-y.

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Aizawa, Tatsuhiko, and Hiroshi Morita. "Dry Progressive Stamping of Copper-Alloy Snaps by the Plasma Nitrided Punches." Materials Science Forum 920 (April 2018): 28–33. http://dx.doi.org/10.4028/www.scientific.net/msf.920.28.

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The dry progressive stamping was strongly required to make mass production of clothing parts and beverage cans. The duplex coating was one of the most reliable means to protect the dies and punches from wear and friction and to prolong their life time. In this coating, the die and punch was first surface-treated to have sufficient hardness in compatible to the hard ceramic coatings. In the present study, the low temperature plasma nitriding at 673 K was employed to harden the six kinds of punches and dies for progressive stamping of copper alloyed fucks. The micro-structure and nitrogen mapping were investigated by SEM with EDS to demonstrate that the hardening took place by nitrogen super saturation into SKD11 matrix without nitride precipitations. These nitrogen super-saturated punches and dies were fix into the progressive die set for dry stamping. No significant wear of tools as well as reduction of stamping loads even after a million shots proved that the low temperature plasma nitriding should be suitable to make hardening of dry stamping die substrates even without use of hard ceramic coatings.

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Wang, Ling Yun, and Hong Hui Huang. "The Application of KBE on Stamping Process Design." Advanced Materials Research 760-762 (September 2013): 1842–46. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.1842.

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UGNX6.0 is used as the development platform by its UG/KF development tools, fusing feature and knowledge together, so as to realize the process associated with the geometric design knowledge and stamping process design. Based on the features of stamping process, the classification of stamping process knowledge has been studied. With the object-oriented method, the rule-based and instance-based technology for expressing and acquiring the stamping process knowledge is discussed. Based on this, the stamping process model driven by knowledge has been established. A bending sheet was taken as an example in introducing the designing process of progressive die based on UG_PDW. The process arrangement was mainly introduced, and the bending part feature recognition and modeling were all elaborated and related examples were given in the paper. It showed the importance of the CAD technology in designing of relatively complex progressive dies.

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Nakagawa, T., S. Futamura, and T. Murata. "Small-Lot-Stamping Production by Progressive Unit Dies." CIRP Annals 42, no. 1 (1993): 313–17. http://dx.doi.org/10.1016/s0007-8506(07)62451-2.

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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 (June 4, 2013): 347–57. http://dx.doi.org/10.1007/s10845-013-0788-0.

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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 (December 1, 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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Wen, Zhou, Jun Ling Zhang, and Xiu Duan Gong. "Based on Pro/E4.0 and PDX’s Rigid Sheet Stamping Mould Design." Advanced Materials Research 971-973 (June 2014): 406–9. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.406.

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This paper analyzes the stamping process of a rigid gasket, designs a set of progressive die for gasket. Three-position of the die includes the punching, cutting, bending and blanking. And compared with single-process die and compound die, the gasket can obtain better surface quality, the die can prevent poor strength and partial load, and punching hole in the ear and separating bending process can improve the accuracy of stamping parts, it has some reference value for the progressive die of the stamping parts. Throughout the design process, the model of rigid gasket and 3D mold design are established in Pro/E4.0 and PDX, this can significantly shorten the design cycle; the process of open-mode is simulated in the Simulation module.

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Chen, Wei, Ke Pan, Ming Yan Wu, Zhong Fu Huang, and Feng Ze Dai. "The Investigation of Multi-Stage Sheet Metal Stamping Process for Deep Drawing." Advanced Materials Research 189-193 (February 2011): 2675–79. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2675.

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Based on empirical analysis and FEA modeling of multi-stage sheet metal stamping, the optimal sheet metal stamping process can be supplied. Concurrently, the effects of process parameters on formability are found by numerical simulation. Taking an example of deep drawing part, the results got from the numerical simulation are compared with experimental results, which proves that finite element analysis (FEA) is effective and accurate in optimizing the process design of multi-stage sheet metal progressive stamping.

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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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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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Huang, Zhen Yuan, and Feng Ruan. "Shearing Edging Investigation in High-Speed Blanking Process Applying Precision Progressive Die." Advanced Materials Research 668 (March 2013): 460–64. http://dx.doi.org/10.4028/www.scientific.net/amr.668.460.

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The high-speed blanking process applying precision progressive die represents the one of the highest level of today’s stamping technology, mainly is used for the production of the ultra-thin, small, complex electronic components. An orthogonal experiment scheme with three factors (including blanking clearance, surface roughness of the die, stamping speed) was established in this paper based on the actual production. The high-speed blanking process experiment applying precision progressive die was carried out base on this scheme. The quality of the shearing edging of blanking parts was used to evaluate the different influence degree of three factors. The result showed that the surface roughness of the die affected the quality of the shearing edging more than that of the other two. The higher the die surface accuracy, the better the quality of the shearing edging. The result also showed that the high speed can reduce the quantity of the burr of the blanking of the ultra-thin sheet metal.

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Wang, Guo Lin. "The Key Stamping Process Analysis and Mold Design." Advanced Materials Research 798-799 (September 2013): 294–97. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.294.

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key production into mass production, the aluminum alloy material, including punching, blanking, two working procedure, precision parts, determine the first punch blanking, after adopting progressive die production. For mould design and calculation, and the convex model component and its structure, die components, positioning parts, unloading and push the pieces of parts to carry on the design, to complete the mold assembly drawing.

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Jonsson, Carl-Johan, Roland Stolt, and Fredrik Elgh. "DESIGN KNOWLEDGE REUSE IN DESIGN OF PROGRESSIVE STAMPING TOOLS: A QUALITATIVE STUDY." Proceedings of the Design Society 1 (July 27, 2021): 1053–62. http://dx.doi.org/10.1017/pds.2021.105.

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AbstractProgressive stamping tools are widely used in mass-production of sheet metal components and their performance is critical as the design of the tool impact the cost of the manufactured component significantly.Knowledge reuse is an important part of successful design in general, and in progressive stamping tool design in particular. In the study described in this paper, 8 tool designers from 5 different Swedish companies were interviewed about (1) at what points in the tool design process they search for previously designed tools for information and knowledge reuse, (2) under what conditions and for what reasons does this reuse take place, and (3) what types of information and knowledge are sought for at each point. The results show that reuse of information and knowledge from previously designed tools happens in many parts of the tool design process. The reasons and conditions for reuse vary depending on where in the process the designer is. High component complexity is one example of a common factor triggering reuse. Also, information about the performance of the tool is important to tool designers, as they only want to reuse information and knowledge from tools with good performance and low maintenance.

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Zhou, Cheng, Kaibo Liu, Xi Zhang, Weidong Zhang, and Jianjun Shi. "An Automatic Process Monitoring Method Using Recurrence Plot in Progressive Stamping Processes." IEEE Transactions on Automation Science and Engineering 13, no. 2 (April 2016): 1102–11. http://dx.doi.org/10.1109/tase.2015.2468058.

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Zhao, Zhan Feng, and Li Xin Yang. "Research on Progressive Die Design for Asymmetric U-Shaped Contactor." Advanced Materials Research 651 (January 2013): 701–5. http://dx.doi.org/10.4028/www.scientific.net/amr.651.701.

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The pressing technologies and the forming difficulties of the asymmetric U-shaped contactor were analyzed. The strip layout was designed for progressive pressing from piercing to bending. The die structure was designed in three plates mode, guiding with ball cage bush and pillar mechanism. The multiple steps bending stations and sliding inclined wedge mechanism were designed to implement the critical forming function. The volume production proved that this toolset’s structure was robust at high stamping speed and the products meet the high quality criteria. A valuable universal design rule was concluded for similar product’s toolset design.

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Gen, Yang, and Wu Yunong. "Progressive stamping process and die design of high strength steel automobile structural parts." Journal of Physics: Conference Series 1605 (August 2020): 012063. http://dx.doi.org/10.1088/1742-6596/1605/1/012063.

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Tor, S. B., G. A. Britton, and W. Y. Zhang. "A knowledge-based blackboard framework for stamping process planning in progressive die design." International Journal of Advanced Manufacturing Technology 26, no. 7-8 (October 2005): 774–83. http://dx.doi.org/10.1007/s00170-003-2037-8.

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Aizawa, Tatsuhiko, Taichi Itoh, Masahiro Tamaki, and Tatsuya Fukuda. "Motion-Controlled Precise Stamping for Microtexturing onto Aluminum Sheet." Key Engineering Materials 622-623 (September 2014): 64–71. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.64.

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Mass production of heat radiation devices requires for fine stamping of micro-textured patterns in the order of micro-meters in dimension onto the sheet product. In this duplication of micro-textured patterns, an original mother micro-pattern in the convex type has to be transferred onto the metallic sheet in the concave type with sufficient accuracy. The authors have proposed a micro texturing of original micro patterns onto the DLC coated mother die-and mold-unit. Once this unit is inserted and fixed in the stiff cassette die-set, the CNC-controlled stamping system works well for progressive stamping process to duplicate the original micro-patterns onto aluminum sheet. In the present paper, two kinds of motion in the stamper were designed to investigate the effect of loading and unloading sequences on the geometric accuracy in micro-texturing. Both the macroscopic and microscopic plastic deformations were described by SEM observation. First, high density oxygen plasma etching method was introduced to explain how to fabricate the micro-textured DLC-die unit. The constant-load motion control was employed as a normal motion in CNC-stamping to describe the microscopic metal flow by piercing the DLC micro-punch into the aluminum sheet. Deep micro-cavities with 3.5x3.5x3 μm3were successfully formed by application of high pressure in stamping. The pulse-wise motion control was further used to improve the geometric accuracy in the present duplication of original micro-texturing pattern onto the aluminum sheet. Owing to the incremental loading in this motion control, the micro-friction was significantly reduced to activate the microscopic metal flow in formation of micro-cavities.

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Niu, Jian Hui, Ping Zhu, and Yong Jin Guo. "Crush Performance of Top-Hat Tubular Structures Considering Different Forming Conditions." Advanced Materials Research 139-141 (October 2010): 571–75. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.571.

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The influence of forming condition on crash performance of thin-walled structures is investigated, in which high strength low alloy steel HSLA340 and dual phase steel DP590 are considered. Stamping and knife-edge-bending process were carried out respectively to form hat channels, and then, impact tests were performed on the spot-welded top-hat sections subjected to quasi-static and dynamic axial loading conditions to identify the forming effect on the crashworthiness. Regular progressive buckling (quasi-inextensional mode) was observed for knife-edge-bent specimens, while the stamped specimens showed peculiar collapse mode, especially, global instability existed for all the specimens under dynamic impacting and their energy absorption capacity was significantly reduced. The result demonstrates that for accurate assessing the structural performance detailed stamping history of sheet metal components should be taken into consideration.

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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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Cheok, B. T., K. Y. Foong, A. Y. C. Nee, and C. H. Teng. "Some aspects of a knowledge-based approach for automating progressive metal stamping die design." Computers in Industry 24, no. 1 (May 1994): 81–96. http://dx.doi.org/10.1016/0166-3615(94)90010-8.

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Wang, Ke Sheng. "Structure Design of pin Round Punch for Stamping Stainless Steel Sheets." Applied Mechanics and Materials 44-47 (December 2010): 2769–73. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2769.

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To solve the fracture problem of pin round punch when stamping small holes on stainless steel sheets, the retaining structure was analyzed and the structure optimization design of pin round punch was presented. It is shown that during stamping stainless steel sheets, it can prevent pin punch from being fractured effectively by adopting clearance fit between pin punch and retainer plate, precise guide of stripper plate and making working part free in the stripper plate .The optimization results show that the B-type round punch is better than A-type in resisting fracture, and the resistance fracture capability of pin round punch is the best when the transition radius between guiding part and working part is R10mm. Aimed at pin punch damaged in biggish progressive dies, the quick replaced structure is designed, which can replace the pin punch in 3 minutes. So this type of structure can save time very much.

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Gu, Li Zhi, Lei Wang, and Tian Qing Zheng. "The Connector Blanking Fracture Surface Quality Prediction in Progressive Stamping Based on Support Vector Machine." Key Engineering Materials 620 (August 2014): 263–68. http://dx.doi.org/10.4028/www.scientific.net/kem.620.263.

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The influencing factors of technical parameters on blanking fracture surface quality are quite few and complicated, including clearance, speed, die roughness and punch radius. And determination of these influencing factors and optimization of the process parameters combination are vital to the blanking with stability and duration. The determination of these parameters depending on experience of designer in production leads to a longer development period and higher cost in testing modes. In the current study, a kind of prediction method for fracture surface quality was put forward by using nonlinear mapping properties and learning capacity of the support vector machine theory in which nonlinear input can be mapped into higher dimensional space by selecting kernel function RBF, and compromise parameter with C=0, and expectation error of ε=0. 1. The final production model was obtained by practice with orthogonal experiment of four factors times three levels. Experimental verification was conducted by selecting a number of test data. Results have shown that the predicted values were in good agreement with those from tests.

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Hong, S., C. S. Joung, B. S. Choi, and D. Y. Lee. "Design of Strip Bridge for Unsymmetrical Progressive Stamping for an Automotive Seat Side Cushion Pane." Transactions of Materials Processing 24, no. 6 (December 1, 2015): 400–404. http://dx.doi.org/10.5228/kstp.24.6.400.

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Mori, Ken-ichiro, Tomoyoshi Maeno, Masato Sakagami, Masanori Ukai, and Yuki Agatsuma. "2-stage progressive-die hot stamping of ultra-high strength steel parts using resistance heating." Procedia Engineering 207 (2017): 681–86. http://dx.doi.org/10.1016/j.proeng.2017.10.1041.

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Steinlehner, F., M. Ott, D. Budnick, A. Weinschenk, S. Laumann, M. Worswick, and W. Volk. "Development of inline closed-loop vibration control in progressive die stamping using finite element simulation." IOP Conference Series: Materials Science and Engineering 967 (November 19, 2020): 012035. http://dx.doi.org/10.1088/1757-899x/967/1/012035.

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Tor, S. B., G. A. Britton, and W. Y. Zhang. "Development of an object-oriented blackboard model for stamping process planning in progressive die design." Journal of Intelligent Manufacturing 16, no. 4-5 (October 2005): 499–513. http://dx.doi.org/10.1007/s10845-005-1660-7.

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Li, Xiao Da, and Xiang Hui Zhan. "Study on the Rapid Progressive Die Design of Sheet Metal with Free Form Surface." Advanced Materials Research 328-330 (September 2011): 828–31. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.828.

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The structure of progress die is generally more complex and need higher precision, so it needs a longer development cycle, especially for the progress die design of sheet metal with free form surface. In this paper, taking a relatively complex part with free form surface for instance, NX PDW which has highly automated design capabilities was applied to finish the mold design, and the key steps and methods of designing such parts with PDW was put forward. In the design process, the stamping simulation software Dynaform was also applied to simulate the key process to predict forming defects and assess the formability of sheet metal. The results show that the application of Dynaform and PDW can improve the design quality and efficiency greatly.

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Pratiwi, S. E., W. Haris, and I. Miftakhul. "Analysis of progressive dies metal stamping components for yoke a plate to maximize age of wear." IOP Conference Series: Materials Science and Engineering 453 (November 29, 2018): 012052. http://dx.doi.org/10.1088/1757-899x/453/1/012052.

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Mori, Ken-ichiro, Tomoyoshi Maeno, Makoto Tsuchiya, and Tatsuhiro Nanya. "Inclusion of hot stamping operations in progressive-die plate forging of tailored high strength gear part." International Journal of Advanced Manufacturing Technology 90, no. 9-12 (November 11, 2016): 3585–94. http://dx.doi.org/10.1007/s00170-016-9705-y.

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Zhibing, Zhang, Liu Yuqi, Du Ting, and Li Zhigang. "Blank design and formability prediction of complicated progressive die stamping part using a multi-step unfolding method." Journal of Materials Processing Technology 205, no. 1-3 (August 2008): 425–31. http://dx.doi.org/10.1016/j.jmatprotec.2007.11.236.

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Wang, Yi Lin, and Hui Cai Long. "A Rapid Parametric CAD System for Fine-Blanking Progressive Dies." Advanced Materials Research 102-104 (March 2010): 252–56. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.252.

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Fine-blanking is an advanced and precision stamping process. Designing the construction die is an important part of the entire development process. But for lots of special and complicated structures of fine-blanking dies, especially some progressive dies, many problems occurred during the traditional two-dimensional design method, such as heavy workload, time-consuming, difficulty of modification, difficulty of checking interference, difficulty of novice entry. To solve these problems, a rapid parametric CAD system based on SolidWorks is developed for fine-blanking progressive dies in the present study. The system comprises five modules, namely DIEBASE, WORKPART, STANDARD, MOTION and DRAWING. The first three modules are designed for the rapid designing and modeling of three different sets of die components. These modules work in tandem with the design-table-based standard part libraries. The MOTION module is designed to simulate the movement situation and check the interferences of the die structure. The last module is designed for the drawing documents of the die parts and assembly. The main feature of the system is its parameter-based interfacing for fine-blanking progressive die design. The design and modification jobs could be done easily and quickly by operating this system, and the system is easy to learn for semiskilled and even unskilled engineers. An illustrative example is demonstrated to show the usefulness of the system.

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Demazel, N., H. Laurent, J. Coër, M. Carin, P. Le Masson, J. Favero, R. Canivenc, and H. Salmon-Legagneur. "Investigation of the progressive hot die stamping of a complex boron steel part using numerical simulations and Gleeble tests." International Journal of Advanced Manufacturing Technology 99, no. 1-4 (August 11, 2018): 803–17. http://dx.doi.org/10.1007/s00170-018-2532-6.

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Jin, Chul Kyu. "Application of the Progressive Forming Method in Simulation and Experimental Study of Rectangular Fins in a Heat Exchanger." Metals 10, no. 3 (March 19, 2020): 395. http://dx.doi.org/10.3390/met10030395.

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A progressive forming method is applied where stamping is continuously executed to produce the rectangular fins of the plate fin heat exchanger. This process produced the fins one-by-one instead of by bundles. In order to produce a fin having a depth of more than 6.0 mm, the forming load and effective stress according to the size of the edge radii of punch and die are predicted by forming simulation. Furthermore, the process of forming the second, as well as the third, fins is predicted. As the edge radii of the die and those of the punch became smaller, the effective stresses generated during deformation became smaller. The forming load during deformation also became smaller. The sizes of the edge radii of die and punch were set to 0.5 mm and 0.2 mm, respectively. When the second fin was formed, overforming occurred at the ribs. The punch was therefore modified so that the rib could be compressed at the same time the fin was formed. With the designed process, the inner fins close to the target size could be manufactured. The resulting fins had right-angled ribs, although the fin width was a slightly opened isosceles trapezoid due to the spring-back.

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Ingarao, Giuseppe, and Rosa Di Lorenzo. "A new progressive design methodology for complex sheet metal stamping operations: Coupling spatially differentiated restraining forces approach and multi-objective optimization." Computers & Structures 88, no. 9-10 (May 2010): 625–38. http://dx.doi.org/10.1016/j.compstruc.2010.02.002.

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Hebel, S. von, J. H. Schleifenbaum, W. Boos, and G. Schuh. "Quantitative Auswirkungen steigender Komplexität im Werkzeugbau*/Control of complexity for tool and die makers - Determining the complexity cost of a progressive stamping tool." wt Werkstattstechnik online 105, no. 10 (2015): 738–43. http://dx.doi.org/10.37544/1436-4980-2015-10-74.

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Aufgrund der steigenden Variantenvielfalt bei gleichzeitig sinkenden Stückkosten steht der Werkzeugbau vor der Herausforderung, Werkzeuge für die Herstellung von Produktvarianten mit geringer werdenden Werkzeugkosten herzustellen. Dies bedingt eine Transparenz über die Wirkzusammenhänge der Kostentreiber bei der Werkzeugerstellung. Werden zwei ähnlich aussehende Produkte mit deutlich divergierenden Werkzeugkosten betrachtet, stellt sich rasch die Frage nach den Ursachen des Kostenunterschieds. Ein aktuell nicht ausreichend definierter Bestandteil bezieht sich auf Kosten, welche durch die Erhöhung der Komplexität in einem Folgeverbundwerkzeug auftreten. Es gilt somit, einen Ansatz zur Bestimmung des komplexitätsbedingten Kostenanteils an den Werkzeugkosten zu entwickeln.   Due to the increasing number of variants and cost reduction per part one of the most important jobs for tool and die makers is to produce progressive tools with decreasing tooling costs, especially for product variants. This implies a transparency on the cost drivers of the tool manufacturing in a first step. Comparing two similar looking products causing highly divergent costs leads to questioning the difference in terms of design, manufacturing and assembly. A currently undefined cost item is defined by an increased complexity in a progressive tool. Therefore, it is necessary to develop an approach for determining the complexity based element of the tool costs.

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Üstünyagiz, Esmeray, and Taylan Altan. "Design of Progressive Die Sequence by Considering the Effect of Friction, Temperature and Contact Pressure." Key Engineering Materials 767 (April 2018): 232–39. http://dx.doi.org/10.4028/www.scientific.net/kem.767.232.

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Progressive and transfer dies are used for forming of sheet metal parts in large quantities. For a given part, the design of progressive die sequence involves the selection of the number of forming stages as well as the determination of the punch and die dimensions at each stage. This design activity is largely experience-based and requires prototyping involving several trial and error operations. In some cases, empirical data and the experience based design procedure can be combined with Finite Element Method (FEM) based analysis to reduce time and cost. Often, when using FEM in progressive die design, friction and its effect upon temperatures is not adequately considered. However, at each forming station the plastic deformation and the tribological conditions influence the material flow as well as the temperatures and pressures at the tool/workpiece interface. The performance of the lubricant and coolant, used in progressive die forming, is affected significantly by interface pressure and temperatures. Therefore, a progressive process and die design methodology should include the consideration of metal flow as well as temperatures and pressures. Heat transfer coefficient, friction, plastic deformation, forming speed at each forming stage, time for part transfer from one stage to the next, and the ability of the used lubricant to cool the dies, have considerable effect upon a successful stamping. This paper describes a method for designing a progressive die sequence for forming axisymmetric sheet metal parts. The methodology for process sequence design combines experience based empirical data obtained through previous designs, design rules and numerical simulations including plastic deformation and friction. The initial experience-based design was refined using FEM and the thinning of the material in each successive drawing stage was calculated. The thermo-mechanical model was obtained using a constant friction coefficient along the tool/workpiece contact zone. Finally, the tool/workpiece interface temperature and the normal pressures were estimated in order that the lubricant can be selected based on these process conditions. The design predictions, made by using empirical data and FEM, were compared with experimental data.

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Kumjing, Sanya. "Transfer Die Technology Application for Efficiency Auto Part Production." Key Engineering Materials 789 (November 2018): 201–7. http://dx.doi.org/10.4028/www.scientific.net/kem.789.201.

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Transfer die technology application for efficiency auto part production analysis of feedermechanism and efficiency of highly precision die design of transfer dies were applied by the feedermechanism system and work feed by pneumatic suction feed mechanism for transfer the workpieceto next station. This workpiece is panel sill and it’s a galvanized grade JAC 270C-35 and 1.4 mm ofthickness. After experimented with a finite element, it was found that the work piece able tostamping without causing damage to the workpiece. Then it’s taken into the die design processfollow by step. Therefore, participation start to create a die as highly precisions progressive die andexamined by stamping workpiece according to the customer requirement. It had found out thatwhen we first’s try out the result are similar valid to the design by made tiny adjustment over thedie. The inspection results of workpiece, according to the drawing design. Obviously, the size andborder of workpiece inspection was acceptable and in order to the result. It able conclude out. As aresult, the company can reduce time, reduce cost and mitigate the risk of error in the actual seriesproduction dies.

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Lauro, F., B. Bennani, J. Oudin, and X. Ni. "Damage Occurrence under Dynamic Loading For Anisotropic Strain Rate Sensitive Materials." Shock and Vibration 5, no. 1 (1998): 43–51. http://dx.doi.org/10.1155/1998/579607.

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A damage model is integrated into the explicit finite element framework to predict the damage evolution which occurrs under dynamic loading in the crash or stamping process. This damage model is based on the description of the growth, nucleation and coalescence of the microvoids. The microvoid growth is related to the plastic incompressibility equation. The microvoid nucleation is controlled by either the plastic strain or stress. The microvoid coalescence is described by a specific function. This damage process leads to the progressive loss of the structure stress carrying capacity. The ductile fracture occurs once it has vanished. The model is adapted to take the material behaviour anisotropy and damage anisotropy into account. The sensitivity of the damage evolution under dynamic loadings in the case of porous strain rate sensitive material is analysed using single tensile tests. Static and dynamic tensile tests of a notched specimen are performed. Influences of the strain rate and the shape of specimen on the failure mode and loss of the structure’s stress carrying capacity are shown.

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Uriarte, Jean Louis, A. Perlade, X. Lemoine, M. Soler, V. Ballarin, and Thierry Iung. "A Physically Based Model for Bake-Hardening Steels and Dent Resistance." Materials Science Forum 539-543 (March 2007): 4232–37. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.4232.

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Arcelor produces « Bake-Hardening » steels for automotive outer panels, which present the advantages of a remarkable drawability combined with a significant hardening after stamping and paint baking by the car maker. This hardening enables to increase the dent resistance of those automotive parts. In order to give easy design criterion and support the development for new “bake-hardening” steels, a physically-based model for Bake-Hardening steels has been developed. It is suitable to predict: -the physical phenomenon of strain ageing based on Cottrell atmospheres formation. A detailed description of the strain ageing kinetics is given based on a generalized form of the Harper model taking into account the diffusion of carbon atoms in the stress field of a dislocation, progressive carbon depletion in the matrix and saturation of the available dislocation sites. -the plastic instabilities propagation during tensile testing according to Piobert–Lüders phenomenon using the finite element method. A local mechanical behaviour is introduced whose shape schematically describes the local dislocation behaviour. The effect of the grain size on the velocity of the Lüders’ band front is especially enlightened. -the effect of ageing process on dent resistance. To do so, a physical extension of the former approach to more complex loading paths is proposed.

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Sgarabotto, Francesco, Andrea Ghiotti, and Stefania Bruschi. "Novel Experimental Set-Up to Investigate the Wear of Coatings for Sheet Metal Forming Tools." Key Engineering Materials 554-557 (June 2013): 825–32. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.825.

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The use of PVD and CVD coatings has increased significantly thanks to the improved tribological performances they offer in many metalforming processes. Nevertheless the proper coating selection for a specific forming operation is not well established yet, being mainly based on trails and error approaches. The use of FEM-supported analyses may represent an effective support in the optimization of process parameters, but the need of testing procedures and reliable models to describe the mechanical and tribological phenomena at the interface between the dies and the workpiece is still significant. The paper presents a novel experimental set-up for the evaluation of the wear resistance of dies coatings in sheet metal forming operations. A progressive stamping process was taken as reference case and analyzed by numerical analyses. Contact pressures, temperatures and tangential loads at the tools-blank interface were evaluated in each deformation step. TiAlN and CrN were selected as reference coatings and deposited via magnetron sputtering technique. The first part of the research was focused on the design of the novel set-up capable to carry out controlled wear tests in laboratory environment, performed with the parameters obtained from the numerical simulation. The results of such experiments were compared to the ones from standard laboratory tests and with industrial trials, though measurements of loads, of surface roughness evolution and by surface investigations trough Scanning Electron Microscope observations.

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Governale, A., A. Lo Franco, A. Panzeca, Livan Fratini, and Fabrizio Micari. "Incremental Forming Process for the Accomplishment of Automotive Details." Key Engineering Materials 344 (July 2007): 559–66. http://dx.doi.org/10.4028/www.scientific.net/kem.344.559.

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In the last decades the scenario of the industrial production is remarkably changed, since new market requirements have to be faced by the industries. The market, actually, more and more, asks for vary models and niches product. The necessity to intercept dynamically and to satisfy the demands for the market, driver of the innovation process, involves the necessity to reduce the Timeto- market introducing to new methodologies of engineering, like the 3D-prototyping, for the qualitative and structural analysis of the final component. For these reasons, at the beginning of the nineties, a new philosophy of sheet metal forming process begins to assert on the industrial scene, whose basic logic is to obtain the shape wished through the progressive action of a tool of simple shape. In this job the application of the simplest process of incremental process on an industrial detail - famous in international field like SPIF (Single Point Incremental Forming) - will be described. The process is intrinsically flexible, and therefore is adapted to the rapid prototyping. The cases are still least, notice in the scientific literature, in which the details of industrial interest have been developed by Incremental Forming process; for this reason, the subject of this job is focused on the evaluation of the possibility to obtain real components of the automotive industry through the SPIF process. The job has been carried out in the R&D laboratory of "Fontana Pietro S.p.A.”, leader in the field of die manufacturing and stamping of component of the automotive industry. In particular, two parts of automotive auto body of aluminium sheets have been considered. It has been lead an analysis of technological and process feasibility, optimizing tool path considering experiences to obtain a product/process for the production of auto body prototypes.

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Zaitsev, A. I. "Perspective directions of metallurgy and steel metal science development." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 4 (May 18, 2019): 417–25. http://dx.doi.org/10.32339/0135-5910-2019-4-417-425.

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The task of principal (multiple) increase of complex of service parameters (often being hard compatible) and steel quality under conditions of costs decrease becomes more and more actual. The solution is possible by creation and application of new principles and approaches based, first of all, on adequate physical and chemical predicting methods and effective technological skill of control non-metallic inclusions, forms of impurities, phase isolations, structure state, including homogeneity of the metal volume. A complex approach to prediction, analysis of phase composition, structure state and steel properties elaborated to implement this progressive direction. It has an important feature like elaborated in details scientific principles. The principles allow not only to make effective the development of new steel and technologies of their production at minimum costs, but also to reveal the content, directions and intensity of processes having place during metal processing. It was illustrated at the example of microalloyed (stabilized) by titanium super-high-carbon IF steel. Importance of accounting of regularity of phase isolations forming kinetics shown, that can result in considerable change of their characteristics and steel properties. This circumstance can be used for unification of chemical composition or development of cassette technologies production, for example, from IF-steels of the same chemical composition, of rolled products of different assortment or strength class. It was shown, that the complex phase isolations forming takes place with participation impurities and elements presented in the steel. Therefore there arose wide possibilities of considerable increase of complex of properties at decreasing of costs. Presence of deformation considerably accelerates the processes of nano-size phase isolations forming not only during rolling, but also during parts manufacturing by hot stamping, combined with steel quenching. This allows to increase their strength by 300–400 MPa additionally to martensitic structure. It is possible, apart from principal perfection of parameters of service characteristics stability, to reach considerable increase of composition homogeneity, structure and properties in the whole metal volume by non-metallic inclusions forming control. Forming of silicate glassy inclusions in low-alloyed steels improves principally the macro- and microstructure of CC billet and impact toughness of rolled products KCV–40 (420–445 J/сm2 ). Their presence in the steel stipulated by kinetic reasons. Additional substantial increase of composition homogeneity, structure and microalloyed steels properties can be reached during the rolling process by return redistribution of components from the axis zone to the surface of the rolled product. High efficiency of the above-mentioned approaches at present has been confirmed by development an array of pipe, structural, automobile steels and highly efficient technologies of their production.

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Ledoux, Y., H. Favrelière, and S. Samper. "Optimization of a Classical Stamping Progression by Modal Correction of Anisotropy Ears." Journal of Manufacturing Science and Engineering 129, no. 6 (July 5, 2007): 1101–8. http://dx.doi.org/10.1115/1.2769730.

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This work is a development from the Inetforsmep European project. We proposed to realize a global optimization of a deep drawing industrial progression (made of several stages) for a cup manufacture. The objectives of the process were the thickness decrease and the geometrical parameters (especially the height). This paper improves on this previous work in the aim of mastering the contour error. From the optimal configuration, we expect to cut down the amount of the needed material and the number of forming operations. Our action is focused on the appearance of unexpected undulations (ears) located on the rim of the cups during forming due to a nonuniform crystallographic texture. Those undulations can cause a significant amount of scraps, productivity loss, and cost during manufacture. In this paper, this phenomenon causes the use of four forming operations for the cup manufacture. The aim is to cut down from four to two forming stages by defining an optimal blank (size and shape). The advantage is to reduce the cost of the tool manufacturing and to minimize the needed material (by suppressing the part flange). The chosen approach consists in defining a particular description of the ears’ part by modal decomposition and then simulating several blank shapes and sizes generated by discrete cosine transformation (DCT). The use of a numerical simulation for the forming operation and the design of an experiment technique allow mathematical links between the ears’ formation and the DCT coefficients. An optimization is then possible by using mathematical links. This original approach leads the ears’ amplitude to be reduced by a factor of 10, with only 15 numerical experiments. Moreover, we have limited the number of forming stages from 4 to 2 with a minimal material use.

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Shanbhag, Vignesh V., Bernard F. Rolfe, and Michael P. Pereira. "Investigation of Galling Wear Using Acoustic Emission Frequency Characteristics." Lubricants 8, no. 3 (March 2, 2020): 25. http://dx.doi.org/10.3390/lubricants8030025.

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In the sheet metal stamping process, during sliding contact between the tool and sheet, it is expected that severe events such as tool wear or fracture on the sheet generate acoustic emission (AE) burst waveforms. Attempts have been made in the literature to correlate the AE burst waveform with the wear mechanisms. However, there is a need for additional studies to understand the frequency characteristics of the AE burst waveform due to the severity and progression of the galling wear. This paper will determine the AE frequency characteristics that can be used to monitor galling wear, independent of the experimental process examined. The AE burst waveforms generated during the stamping and scratch tests are analysed in this paper to understand the change in the AE frequency characteristics with the galling severity. These AE burst waveforms were investigated using the Hilbert Huang Transform (HHT) time-frequency technique, band power, and mean-frequency. Subsequently, these AE frequency features are correlated with the wear behaviour observed via high-resolution profilometer images of the stamped parts and scratch surfaces. Initially, the HHT technique is applied to the AE burst waveform to understand the influence of wear severity in the power distribution over the wide AE frequency range. Later, the AE bandpower feature is used to quantitatively analyse the power in each frequency interval during the unworn and worn tool conditions. Finally, the mean-frequency of AE signal is identified to be able to determine the onset of galling wear. The new knowledge defined in this paper is the AE frequency features and wear measurement feature that can be used to indicate the onset of galling wear, irrespective of the processes examined.

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Pinho, Sandra, Qiaozhi Wei, Maria Maryanovich, Halley Pierce, Fumio Nakahara, Jianing Xu, Daniel K. Borger, Dachuan Zhang, Amit Verma, and Paul S. Frenette. "VCAM1 Confers Innate Immune Tolerance on Hematopoietic and Leukemic Stem Cells." Blood 134, Supplement_1 (November 13, 2019): 524. http://dx.doi.org/10.1182/blood-2019-123431.

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Hematopoietic stem cells (HSCs) home to the bone marrow (BM) via, in part, the interactions with Vascular Cell Adhesion Molecule-1 (VCAM1). Upon migrating into the BM, HSCs are vetted by perivascular phagocytes to ensure their self-integrity. Here, we show that VCAM1 is also expressed on healthy Lineage− c-Kit+ Sca1+ CD48− CD150+ HSCs and upregulated on acute myeloid leukemia (AML) cells where it serves as a quality-control checkpoint for entry into BM by providing 'don't-eat-me' stamping in the context of major histocompatibility complex (MHC) class-I presentation. Using a line in which HSCs are hemizygous for MHC (H-2b/H-2q) and Vcam1 can be conditionally deleted by breeding Vcam-1 floxed (Vcam1fl/fl) mice with a Csf1r-iCre transgenic line (referred to as Vcam1cKO), we find that Vcam1 deletion in HSCs leads to striking defects in hematopoietic recovery when donor and recipients are mismatched (donor H-2b/q; recipient H-2b). Remarkably, wild-type donor BM cells with haplotype-mismatched genotype exhibit engraftment and survival similar to their syngeneic (H-2b) Vcam1fl/fl (control) and Vcam1cKO counterparts. In vivo phagocytic assays show that Vcam1cKO;H-2b/q HSCs are phagocytosed by host H-2b immune phagocytes whereas Vcam1-sufficient H-2b/q HSCs are not targeted. Clearance is not dependent on irradiation-induced damage since the same phenotype is observed in parabiotic mice where Vcam1cKO;H-2b/q HSCs are not able to engraft their wild-type (H-2b) parabiont partner. Mechanistically, we show that MHC-mismatched HSCs are recognized at least in part by paired Ig-like receptor-B (PIR-B), a negative regulator of immune cells upon recognition of MHC-I molecules, expressed on α4β1+ murine phagocytic myeloid cells. Transplantation assays revealed that in absence of PIR-B inhibitory signals, Vcam1 deletion leads to significant reductions (~60%) in the early engraftment of syngeneic Vcam1cKO;H-2b/b cells compared to Vcam1fl/fl;H-2b/b cells, suggesting that the absence of VCAM1 also promotes cell clearance by syngeneic Pirb-/- phagocytes. That VCAM1 expression can provide innate immune tolerance indicates that this pathway may be of use for cancer cells. Indeed, alterations in VCAM1 expression has been reported in various cancer cell types, including AML. To evaluate the effect of genetic Vcam1 deletion and MHC-mismatch on AML progression, we have transduced Vcam1cKO;H-2b/q and Vcam1fl/fl;H-2b/q cells with the pMSCV-MLL-AF9-GFP oncogene. Strikingly, analysis of primary AML recipient BM reveals a marked reduction (>99%) of phenotypic Vcam1cKO leukemic stem cells compared to Vcam1fl/fl control. Accordingly, the survival of secondary AML recipient mice is significantly prolonged in mice harboring Vcam1cKO AML cells relative to Vcam1fl/fl AML. Leukemia progression is markedly enhanced by phagocyte depletion (using clodronate liposomes), and the engraftment defect of Vcam1cKO AML cells is completely rescued, indicating an important role for phagocytes in the establishment of Vcam1-deficient AML. Analysis of The Cancer Genome Atlas (TCGA) database reveals that high VCAM1 expression is associated with the poor prognosis of patients with AML (P=0.03). In addition, VCAM1 is significantly overexpressed in Lineage− CD34+ CD38− CD90− short-term repopulating HSCs from sorted human AML BM samples. VCAM1 overexpression in human AML MOLM13 cancer cells promotes disease progression and significantly (P=0.005) shorter survival. Furthermore, VCAM1 blockade using novel monoclonal antibodies after implantation of primary human AML into immunodeficient mice blunts disease progression, and extends survival of mice. Altogether, these results suggest that VCAM1 engagement serves as a quality-control checkpoint for entry into BM by providing 'don't-eat-me' stamping, allowing HSCs to migrate and engraft, and offers a novel strategy to eliminate cancer cells via modulation of the innate immune tolerance. Disclosures Wei: Albert Einstein College of Medicine, Inc: Patents & Royalties. Verma:Janssen: Research Funding; Stelexis: Equity Ownership, Honoraria; Acceleron: Honoraria; Celgene: Honoraria; BMS: Research Funding. Frenette:Cygnal Therapeutics: Equity Ownership; Ironwood Pharmaceuticals: Research Funding; Albert Einstein College of Medicine, Inc: Patents & Royalties; Pfizer: Consultancy.

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Journal articles on the topic 'Progressive stamping die'

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