Journal articles: 'Fine blanking process'

1

Lee, TC, LC Chan, and BJ Wu. "Straining behaviour in blanking process - fine blanking vs conventional blanking." Journal of Materials Processing Technology 48, no. 1-4 (January 1995): 105–11. http://dx.doi.org/10.1016/0924-0136(94)01639-i.

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Wieckowski, Wojciech, Piotr Lacki, and Janina Adamus. "Modelling of Fine Blanking Process of the Aluminium Sheets." Key Engineering Materials 473 (March 2011): 290–97. http://dx.doi.org/10.4028/www.scientific.net/kem.473.290.

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The required technological quality of the blanked products can be achieved through operations of fine blanking. This allows for obtaining products with improved dimensional accuracy and good quality cut-surface. In order to cut products from soft materials, including aluminium and its alloys, the methods of fine blanking with upsetting and fine blanking with reduced clearance are typically employed. The study presents the results of numerical modelling of the fine blanking process for a disk made of 1-millimetre sheet aluminium EN AW-1070A. The goal of the numerical simulations was to evaluate the effect of clearance between blanking die and the punch, and the impact of V-ring indenter on stress and strain distribution in the shearing zone.

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Long, An, Rui Ge, Yi Sheng Zhang, and Li Bo Pan. "Numerical Simulation and Parameter Optimization of Cam’s Fine Blanking Process." Advanced Materials Research 396-398 (November 2011): 134–39. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.134.

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To conclude the mechanics of fine blanking, the numerical simulation model of a cam’s fine blanking process was established, the forming process was simulated by DEFORM-3D software, the deform principle was summarized. Then the effect of three key processing parameters such as gap between punch and die, pressure-pad-force/counter force, serrated ring postion to fine blanking quality were researched, optimized parameters in fine blanking were gained.

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Kim, Jong Deok, and Young Moo Heo. "Finite Element Analysis of the Fine Blanking Process for Seat Recliner Plate Holder of Recreation Vehicle." Advanced Materials Research 1025-1026 (September 2014): 391–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.391.

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In this paper, the finite element analysis (FEA) of the fine blanking process was conducted for the seat recliner plate holder of recreation vehicle. Because the plate holder was a complex part with the various dimple shapes, it was formed and blanked with a three-station progressive fine blanking tool. The fine blanking tool was optimally designed, manufactured and performed the fine blanking experiments. The shear surface of the outer contour, the stress and strain of the part, and the loads of the tool elements were estimated by the results of the fine blanking simulation. Because the plate holder samples from fine blanking experiments had the good accuracy of the dimples’ position and dimension, it would be noticed the fine blanking simulation was conducted without error.

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Du, Hong, Wei Fu Fan, and Zhong Mei Zhang. "Comparative Study of the Process Fracture between Fine-Blanking with Negative Clearance and Conventional Blanking." Advanced Materials Research 97-101 (March 2010): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.191.

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The different separation mechanism of fine-blanking with negative clearance and conventional blanking under different blanking process are analyzed through fine-blanking with negative clearance and conventional blanking processing experiments on AISI-1045 steel. The fractography photographs in the different deformation regions, such as rollover zone, shearing band, fracture zone and burr zone are scanned by scanning electron microscope (SEM-JSM-6360LV). The place of fracture of fine-blanking with negative clearance has emerged into the middle of work piece not the undermost of workpiece, and the width of fracture band is as tiny as 50-100 micron. The smooth surface formed by the uniform plastic flow in the process fine-blanking with negative clearance, and the full course of finally toughness fracture have been analyzed in the final phase of ejecting in fine-blanking with negative clearance. From the perspective of material meso-damage, the fracture mechanism of special blanking process with negative clearance has been illustrated in details.

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Chen, Qi Jun, Yi Gan, and Ji Tao Du. "Numerical Simulation and Optimization of Processing Parameters for Fine-Blanking of FPG." Applied Mechanics and Materials 101-102 (September 2011): 475–78. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.475.

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In order to find out the influence trend and the impact factor of different process parameters for die-roll of gear shape and smooth-shear surface, the forming process to characteristics of FPG fine-blanking that based on fine-blanking theory was simulated by using Deform-3D. The best scheme suitable for FPG fine-blanking was obtained, which was also validated by the simulation test. The results showed that the processes were feasible and thus provided the basis to improve the die life and the forming quality for fine-blanking of FPG.

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Zhang, Z. M., F. Li, and H. Zhang. "Study and Analysis the Facture Mechanism for Fine-Blanking with Negative Clearance on 60Mn." Applied Mechanics and Materials 229-231 (November 2012): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.91.

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In order to improve the punching process, further enhance the blanking section quality. This paper studied the common blanking of 60Mn and the fine blanking with negative clearance of 60Mn blanking work piece metallographic structure by using scanning electron microscope. The results show that the fine blanking with negative clearance process can increase the work-hardening degree and further thin the punching surface tissue, inhibit the crack, and make the blanking surface smooth. The tensile and tear result in the generation of cracks and burrs, and the extrusion forming of fine blanking with negative clearance inhibit the generation of cracks, and eliminate the conditions of the burrs. As the extrusion process, the degree of work hardening in fine blanking with negative clearance is higher than the common blanking, the organizations are more closed.

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Qin, Si Ji, Li Yang, and Jia Geng Peng. "Research on Fine Blanking Process with Stepped-Edge Punch." Applied Mechanics and Materials 16-19 (October 2009): 495–99. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.495.

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The fine blanking process with a stepped-edge punch was researched by finite element method (FEM) and experiment investigation. Finite element analysis showed that the hydrostatic stress of the blank around the edges changes a little during fine blanking process using a stepped-edge punch with negative clearance. The burnish zone of sheared surface increases with the increase of the relative negative clearance. The reasonable forming parameters were presented by a lot of experiment investigations. Parts of three kinds of materials, Q235 steel, copper and industrial aluminum, were formed using fine blanking process with a stepped-edge punch. Full burnish zone were obsearved for all the parts.

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Fang, Gang, and P. Zeng. "A Study of Fine Blanking Process by FEM Simulation." Key Engineering Materials 261-263 (April 2004): 603–8. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.603.

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Fine blanking process with V-ring was simulated with FEM. The geometric parameters of the die, the punch, the serrated ring and the sheet are modeled. In this paper, some other assumptions are made for the analysis. The workpiece is considered as elastic-plastic material, while the tools are defined as rigid bodies. The damage model taking into account the influence of hydrostatic stress is used to simulate material fracture in blanking. The stress status and forming process are analyzed. Authors also investigated the effect of distance from tooth to die edge on roll-over high. The simulation can reflect the laws of fine blanking process.

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Lv, Lin, Guo Song Ning, and Ming Ming Chen. "Research on Flow Mechanism of Materials and Micro-State of Distortion Area in Closed Extruding Fine Blanking Process." Advanced Materials Research 201-203 (February 2011): 2785–88. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2785.

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There are some differences between traditional fine blanking and closed extruding fine blanking in stress, separation process and change of material's performance. The article researched the micro-state's characteristics and deformation law in closed extruding fine blanking process, through observing the closed extruding fine blanking parts' metallographic, flow lines of deformation zone and analyzing the micro-hardness.

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Daiezadeh, Vahid, Majid Elyasi, and Meghdad Mollaei. "Forming Force Analysis in Fine-Blanking Process by Experimental Approach and Analytical Formulation." Applied Mechanics and Materials 110-116 (October 2011): 2723–29. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2723.

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Large deformation is a major deformation operation in many metal-forming processes, such as forging, rolling, extrusion, stamping and fine-blanking. It is difficult to study the deformation changes in these processes in a practical way, through the measurement of forces, due to the severe and localized nature of plastic deformation such as in the fine-blanking operation. Therefore, the forces analysis of most metal-forming processes cannot be carried out successfully by experiments. Thus, this paper aims to present the development of an effective process of forces measurement in fine-blanking process. Also, the effect of blank geometry and material properties on forming force in fine-blanking process was studied by theoretical formulation and experimental approach. Tensile strength and initial blank thickness were considered in this research. The obtained results indicated that by increasing the initial blank thickness and the tensile strength, the forces in fine-blanking process is increased.

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Shahsavan, M., and M. Sedighi. "An Innovative Experimental Setup for Laboratory Tests of Fine Blanking Process." Advanced Materials Research 650 (January 2013): 567–71. http://dx.doi.org/10.4028/www.scientific.net/amr.650.567.

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Fine blanking process can produce parts with accurate cutting edge quality. Studying the effects of process parameters on accuracy and quality of fine banking products are usually expensive. In this paper, an innovative idea has been introduced for a set of fine blanking test rig which is not as complicate and expensive as standard fine blanking dies but it could be used alternatively for limited laboratory works. The main concept of the rig is based on manual adjustment of counter punch force and blank holder force by means of rubber spring and torque meters respectively. As a case study, the effect of counter punch force of fine blanking process in a 2mm thickness steel AISI-1006 sheet was studied by this test rig. The results show that increasing the counter punch force makes burr dimension on cutting edge to get smaller which means better quality of the product.

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Li, J. H., Q. H. Xiao, H. Zhang, and F. Li. "The Anti Corrosion Performance of the Fracture Surface by Fine-Blanking with Negative Clearance with ASTM-Gr.D." Applied Mechanics and Materials 229-231 (November 2012): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.113.

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The fine blanking with negative clearance is a process with characteristic of the high blanking precision and the better fracture quality, so the blanking fracture surface structure are intensity. This paper has carried on the contrast and analysis between common blanking and the fine-blanking with negative clearance fracture face and burrs zone cavity metallographic and further indicated the different process blanking work-piece fracture face characteristics, illuminated the anti-corrosion of blanking fracture surface between different blanking process by using corrupt principium. The anti-corrosion of blanking fracture face could enhance wear resistance of blanking work piece evidently. Therefore, it could improve fatigue strength and the working life of work piece greatly.

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Du, H., F. Li, and H. Zhang. "Comparative Analysis the Stainless Steel Surface Structure on Fine-Blanking with Negative Clearance and Common Blanking." Applied Mechanics and Materials 229-231 (November 2012): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.105.

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The stainless steels are used more and more in blanking process. To further enhance the quality of blanking fracture surface, this paper made the related experiments of fine-blanking with negative clearance in stainless steel. Through the comparison analysis between the fine-blanking microstructure and common blanking one with stainless steel, the result points out that the fine-blanking with negative clearance inhibit the warping in common blanking, make the work-hardening of material fracture surface improves, and which can have a more positive effect for the fine-blanking with negative clearance. Meanwhile, the work-hardening capacity of two blanking methods was different, and it can enhance the punching section entire strength commendably by fine blanking with negative clearance.

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Kim, Jong Deok, and Hyun Jun Ko. "Simulation on the Life Expectancy of Fine Blanking Tool Punch for High-Strength Automobile Start Motor Flange." Applied Mechanics and Materials 607 (July 2014): 612–15. http://dx.doi.org/10.4028/www.scientific.net/amm.607.612.

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Fine blanking is a press-working process that permits the production of precise, finished components which are cleanly sheared through the whole cutting surface. The manufacturing cost can be reduced because the secondary operations such as milling and broaching can be eliminated and the multistage combined stamping process can be added. The product cost can increase, however, while the precise fine blanking tool and high cost fine blanking press are required. Therefore it is important to design the fine blanking tool in view of the life expectancy of the punch. In this paper the fatigue simulation of fine blanking tool punch for automobile start motor flange was conducted using the commercial FEA software ANSYS. Initially, the material properties were tested and the fine blanking tool was designed for production experiments. The modelling of tool elements and the fatigue simulation according to repeated loads were conducted. As a result of fatigue simulation, the fine blanking tool punch for start motor flange had been fractured with 3,981 strokes. In the fine blanking production experiments, the fine blanking tool punch had to be regrinded after it was used with 3,425 strokes. It was also found that the fatigue simulation of fine blanking tool punch was conducted with an error of 14%.

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Fan, W. F., J. H. Li, and Zhong Mei Zhang. "Study on the Impact of Fine-Blanking with Negative Clearance on the Materials Microstructure and Hardness." Advanced Materials Research 97-101 (March 2010): 149–52. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.149.

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The Fine-blanking with negative clearance processing is very complicated process because the blanking clearance is negative clearance, for this reason, the state of stress and strain in sheet inside are also more complicated than conventional blanking. In the process of fine-blanking with negative, plastic deformation of the material is fiercer than conventional blanking, and the change of material inner structure and hardness is more intense because of plastic deformation. The deformation principle of fine-blanking deformation with negative clearance is analyzed by means of streamline and metallographic photograph and micro hardness. The impact of fine-blanking with negative clearance on the materials microstructure and hardness is discussed. The research result indicates that the hardening value is 1.8 times than original material itself and the maximum harden depth is 2.2mm for AISI-1045 steel in the process of blanking with negative clearance. Therefore, it could enhance fatigue strength and the working life of workpiece greatly because of the improvement of the material inner structure.

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Du, H., and S. M. Ding. "The Contrast Research of the Finite Element Simulation for Ordinary and Fine Blanking with Negative Clearance." Materials Science Forum 575-578 (April 2008): 316–21. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.316.

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This paper puts forward a negative clearance fine-blanking theory and its technique process, and introduces the technical processing of fine-blanking which can be used on ordinary punching machines. In this paper, computer simulation and the experimental study of negative clearance fine-blanking process are carried out. Thus the parameters of the force of blanking, the value of negative clearance are determined. The effect of fine-blanking quality was obtained, and the perfect rate of the blanking fracture achieves 90%. By comparing negative clearance precise blanking with conventional blanking, the following conclusions are drawn: 1. Blanking quality of negative clearance blanking is increased by 57% than that of conventional blanking. 2. The down surface of the work-pieces obtained by the conventional blanking processing have 0.2 - 0.5 mm longitudinal burrs, while the work-pieces obtained by the negative clearance blanking have no burrs. Thus the processing of clear away the burrs could be spared. And the manpower, the material, energy and the equipment investment are saved. The researching result provides theoretic reference and the experimental data for the engineering practice. It has instructive significance and reference value to engineering manufacturing.

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Zhu, Chun Dong, Fu Tao Li, and Zhi Qiang Gu. "3D Numerical Simulation and Optimization of Processing Parameters in Fine Blanking of Back Plate of Brake." Advanced Materials Research 291-294 (July 2011): 440–43. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.440.

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Due to the limitation of 2D simulation in fine blanking, finite element software DEFORM-3D was used to simulate the 3D model of Back Plate. In this article the Normalized Cockroft&Latham fracture criterion was chosen to simulate the blanking process. The distribution and developing trend of the hydrostatic stress, equivalent stress in the fine blanking process are predicted. When the die radii are between 0.4mm and 0.6mm, burnished surface improves. It shows that the ideal blanking clearance value is 0.6% of the material thickness. The results indicate that FE numerical simulation could effectively optimize fine blanking process and offer basis for quality improvement.

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Deng, Ming, Ming Ming Chen, and Guo Song Ning. "Wear Resistance Experimental Analysis of Closed Extruding Fine Blanking Parts Surface." Advanced Materials Research 499 (April 2012): 384–87. http://dx.doi.org/10.4028/www.scientific.net/amr.499.384.

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Closed extruding fine blanking parts is processed under strong hydrostatic pressure, material microstate and mechanical properties near the surface change greatly. In order to research the closed extruding fine blanking parts surface wear resistance, make a reciprocating friction test, and make wear resistance comparative analysis between closed extruding fine blanking parts and turning parts which has the same surface roughness. The results show that in the running wear stage and stable wear stage the wear resistance of closed extruding fine blanking parts is better than turning parts, closed extruding fine blanking process has greatly improved the surface wear resistance.

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Zheng, P. F., Tai Chiu Lee, and Luen Chow Chan. "Finite Element Modeling of the Fine-Blanking Process." Key Engineering Materials 274-276 (October 2004): 727–32. http://dx.doi.org/10.4028/www.scientific.net/kem.274-276.727.

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Bubphachot, Bopit. "Microstructure Affecting Cutting Quality in Fine Blanking Process." American Journal of Engineering and Applied Sciences 2, no. 4 (April 1, 2009): 665–68. http://dx.doi.org/10.3844/ajeassp.2009.665.668.

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Dulebová, Ľudmila, Branislav Dulebá, and Emil Spišák. "Analysis of some aspects of fine blanking process." Scientific Letters of Rzeszow University of Technology - Mechanics 30, no. 85(2/2013) (2013): 119–27. http://dx.doi.org/10.7862/rm.2013.11.

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Mole, N., and B. Štok. "Finite element simulation of sheet fine blanking process." International Journal of Material Forming 2, S1 (August 2009): 551–54. http://dx.doi.org/10.1007/s12289-009-0515-8.

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Česnik, D., J. Rozman, and M. Bizjak. "Influence of Sheet Metal on Fine-Blanking Process." Materials and Manufacturing Processes 24, no. 7-8 (May 28, 2009): 832–36. http://dx.doi.org/10.1080/10426910902841803.

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Djavanroodi, F., A. Pirgholi, and E. Derakhshani. "FEM and ANN Analysis in Fine-Blanking Process." Materials and Manufacturing Processes 25, no. 8 (July 30, 2010): 864–72. http://dx.doi.org/10.1080/10426910903367444.

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Liu, Yanxiong, Yuwen Shu, Wentao Hu, Xinhao Zhao, and Zhicheng Xu. "Active Vibration Control of a Mechanical Servo High-speed Fine-Blanking Press." Strojniški vestnik – Journal of Mechanical Engineering 67, no. 9 (September 15, 2021): 445–57. http://dx.doi.org/10.5545/sv-jme.2020.6959.

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The fine-blanking process as an advanced sheet metal forming process has been widely applied in industry. However, specially designed equipment is required for this process. In this paper, a novel mechanical servo high-speed fine-blanking press with the capacity of 3200 kN is proposed, and the vibration control for this machine is researched to achieve the requirement of fine-blanked parts of high dimensional accuracy, since the vibration of the fine-blanking machine will cause the machining displacement error and reduce the machining accuracy. Self-adaptive feed-forward control is used to simulate the active vibration control of the mechanical fine-blanking machine. The vibration control principle of the fine-blanking machine is described, and the control algorithm is established. At the same time, the mechanical vibration model of the fine-blanking machine as the controlled object is established, and the parameters of the excitation input and the mechanical model are obtained by the fine-blanking finite element simulation and the experiments of the vibration measurement of the press. Finally, the numerical simulation and analysis of active vibration control based on MATLAB are carried out. The results show that the control effect is good, and the vibration response is effectively reduced, thus greatly increasing the processing accuracy, saving a significant amount of energy, and reducing the energy consumption and defective rate.

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Daniel, Josef, Radek Žemlička, Jan Grossman, Andreas Lümkemann, Peter Tapp, Christian Galamand, and Tomáš Fořt. "Comparison of Lifetime of the PVD Coatings in Laboratory Dynamic Impact Test and Industrial Fine Blanking Process." Materials 13, no. 9 (May 6, 2020): 2154. http://dx.doi.org/10.3390/ma13092154.

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Protective hard PVD coatings are used to improve the endurance of the tools exposed to repeated impact load, e.g., fine blanking punches. During the fine blanking process, a coated punch repeatedly impacts sheet metal. Thus, the coating which protects the punch surface is exposed to the dynamic impact load. On the other hand, the laboratory method of dynamic impact testing is well known and used for the development and optimization of protective coatings. This paper is focused on the comparison of tool life and lifetime of the industrial prepared PVD coatings exposed to repeated dynamic impact load in the industrial fine blanking process and the laboratory dynamic impact testing. Three different types of protective coatings were tested and the results were discussed. It was shown that the lifetime of coated specimens in both the fine blanking and the dynamic impact processes was influenced by similar mechanical properties of the protective coatings. The qualitative comparison shows that the lifetime obtained by the dynamic impact test was the same as the lifetime obtained by the industrial fine blanking process. The laboratory impact test appears to be a suitable alternative for the optimisation and development of protective PVD coatings for punches used in the industrial fine blanking process.

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Yin, Fei, Hua Jie Mao, Lin Hua, and Zhi Qiang Gu. "Investigation of Die Wear during Fine-Blanking Process of a Kind of Automobile Synchronizer Slipper by FEM and Experiments." Advanced Materials Research 314-316 (August 2011): 643–52. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.643.

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In this paper, die wear during fine-blanking process of a kind of automobile synchronizer slipper was investigated based on Finite Element Method (FEM) and experiments. The Finite Element (FE) model to simulate the fine-blanking process of the automobile synchronizer slipper was established on the DEFORM-3D software platform, and Archard's wear model was employed to calculate die wear during the process. Meanwhile, mesh refinement and automatic remeshing technique were used during meshing process of the blanked materials and bottom die in order to achieve high accuracy results of FE simulations and improve the computational efficiency. Simulation results have been verified and show good agreement with the real manufacture. In addition, relationships between die wear and the process parameters during fine-blanking process such as pressure pad force, ejector force, blanking speed, blanking clearance, fillet radius of bottom die as well as hardness of bottom die were investigated, respectively via FEM. The simulation results indicate that die wear is in proportion to the pressure pad force, ejector force, blanking speed and fillet radius of bottom die, while in inverse proportion to the blanking clearance and hardness of bottom die, which will provide a reliable reference for the real manufacture and engineering application.

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Yang, Shan, Lin Hua, and Yan Li Song. "Numerical Investigation of Fine Blanking of a Helical Gear." Applied Mechanics and Materials 190-191 (July 2012): 121–25. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.121.

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Fine blanking, as an effective and economy metal forming process, can be used for the manufacturing of helical gears with inclined forming movement. In the present study, a reliable three-dimensional (3D) rigid-plastic finite element (FE) model is developed on the DEFORM-3D platform for rotational fine blanking of a helical gear. Based on this FE model, distributions of different field variables such as metal flow velocity, mean stress and effective strain are obtained, and cut surface features and punch stroke curve are predicted. The results achieved in this study can not only evaluate the capabilities of the rotational fine blanking process of a helical gear, but also provide valuable guidelines and a better understanding of the deformation mechanism of this process.

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Leung, Y. C., L. C. Chan, C. H. Cheng, and T. C. Lee. "The effects of tool geometry change on shearing edge finish in fine-blanking of different materials." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 217, no. 8 (August 1, 2003): 1057–62. http://dx.doi.org/10.1177/095440540321700803.

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An excellent quality of shearing edge implies that a smooth cutting edge without tearing will be observed on the whole edge surface. This is one of the most significant features of the fine-blanking process. To achieve this good blanking edge quality in fine-blanking, quite a large number of factors need to be considered simultaneously during the operation, such as blanking speed, processing material, product shape, lubrication and tool geometry. Thus, the objective of this paper is mainly to study the influence of tool geometry change in fine-blanking for different materials. This is because the nose radius usually seriously deteriorates with increasing service period in mass production, which eventually causes the entire loss of the specific features of the fine-blanking process. Therefore, a tailor-made experimental study was carried out to investigate the relationship between the punch nose radius and the shearing edge quality, such as the shearing edge surface finish, burr height and die-roll height, during fine-blanking for different types of materials. Consequently, findings show that an increase in the punch nose radius produces a higher percentage of fracture of the blanked edge and increases the amount of burr height.

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Zhou, Fei, Hua Jie Mao, Yan Xiong Liu, and Lin Hua. "Parameters Design of Discontinuous Dot Indenter in Fine Blanking Process with Different Thickness Workpiece." Key Engineering Materials 716 (October 2016): 762–69. http://dx.doi.org/10.4028/www.scientific.net/kem.716.762.

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This paper proposes a new blankholder to fine blanking process. V-ring indenter has been widely applied in fine blanking to produce clean cut parts, however, it is difficult to be manufactured, the machining accuracy of which is hard to ensure and the cost is very high. In this approach, the fine blanking process combined with discontinuous dot indenter was put forward and the parameters design for workpiece with different thickness was studied with the finite element simulation and the orthogonal experiment methods. The larger burnished surface zone can be obtained by optimizing discontinuous dot indenter parameters. In addition, the relationship between the discontinuous dot indenter parameters and the workpiece thickness was got from data processing. Finally, applying this relationship to fine blank workpiece with different thickness, nearly full clean cut surface part was obtained.

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Wang, Yi Min, Li Min Wen, and Xian Cai Wang. "The Study of the Relation between Clearance and Fine-Blanking Quality." Advanced Materials Research 472-475 (February 2012): 2161–65. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2161.

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a numerical model research of fine-blanking has been built up. The fine-blanking process of parts with clearance 0.1%S, 0.7%S, and 1.3%S. (S stands for the thickness of the material) respectively, thickness of plate 2.9mm and diameter 16mm of steel 45, has been simulated. Through simulation, the study gets the material distribution situation of mean-stress fields in the progress of fine-blanking, and the author analyzes the relation between mean-stress fields and the crack of shearing zone. Through analysis the author concluded that the section quality grows with decrease of blanking clearance.

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Weiser, Ingo Felix, Andreas Feuerhack, and Thomas Bergs. "Investigation of the Micro Hardness at the Cut Surface of Fine Blanked Parts with Variation of Sheet Material and Cutting Temperature." Key Engineering Materials 883 (April 2021): 269–76. http://dx.doi.org/10.4028/www.scientific.net/kem.883.269.

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Fine blanking is a production technology of high importance especially for the automotive industry. As a procedure of sheet metal separation, it is possible to produce complex parts in a single stroke. As a difference to conventional punching, the cutting surface of fine blanked parts can often be used as a functional surface without further process steps. However, fine blanking as a forming process changes the microstructure of the metal sheet to a higher extend than cutting or machining processes. Due to this, it is of utmost importance to investigate the cause-effect-relations between the fine blanking process parameters and the resulting properties of the fine blanked part. Especially the condition of the cut surface as an important quality criterion has to be investigated. The quality characteristics of the cut surface of fine blanked parts are often subject of investigations. In addition, it would be of importance to investigate how the material properties in the shear zone are changed by the fine blanking process. This on one hand in turn can enable conclusions to be drawn about possible punch wear. If, on the other hand, hardening of the cut surface takes place as a result of fine blanking, then this could have a positive influence on the application properties of fine blanked components. Thus, an experimental fine blanking investigation of the micro hardness of the cutting surface has been made with variation of steel material and cutting temperature. It could be demonstrated that the micro hardness increases in direction towards the burr. This is independent on material and cutting temperature.

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Wen, Li Min, Qing Li, and Yi Min Wang. "The FEM Simulation of the Pressure and Fine-Blanking Quality." Advanced Materials Research 721 (July 2013): 397–401. http://dx.doi.org/10.4028/www.scientific.net/amr.721.397.

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A numerical model research of fine-blanking has been built up. The fine-blanking process of parts with pressure is 0KN20 KN40 KN60 KN respectively , thickness of plate 2.9mm and diameter 16mm,of steel 45, has been simulated. Through simulation, the study gets the material distribution situation of mean-stress fields in the progress of fine-blanking, and analyzes the relation between mean-stress fields and the crack of shearing zone. And get the pressure optimization value.

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35

Seo, Y. H., Byoung Kee Kim, and H. D. Son. "Application of Fine Blanking to the Manufacture of a Sprocket with Stainless Steel Sheet." Key Engineering Materials 261-263 (April 2004): 1665–70. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.1665.

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Wire cutting(EDM) or blanking is used to made workpieces from sheet metal. Wire EDM provides a relatively simple method for making holes of any desired cross section in material. But EDM requires a lot of working time and the high unit cost of production. In conventional blanking, for the production of precision devices or assemblies, it is always necessary that at least two, but generally more, secondary operations are required per piece part. Using the fine blanking process, a precise finished part with inner and outer forms clearly sheared over the whole material thickness are produced in one single operation. In this study an attempt is made to manufacture a sprocket with fine blanking process. The sprocket is parts for the tape feeder of surface mount system in electronic parts. First, a change of the existing design is made in a sprocket. The materials selected are three kinds of stainless steel, SUS304, SUS316 and SUS430. And the mechanical properties are investigated through the tensile test. After fine blanking, hardness and precision are examined with hardness test and 3-dimensional coordinate measuring for samples. The results of investigations of fine-blanking process with the help of FEM code, DEFORM 2D, are presented. For the simulation, SUS304 and SUS316 are used as materials. The damage model of Cockroft and Latham is used to calculate damage. Die-roll height, die-roll width, burnish zone and fracture zone from the fine blanking simulation are investigated in comparison with them of samples. And the applied force at each part of fine-blanking die is estimated with load-stroke diagram.

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36

Yang, L., Z. M. Zhang, and W. F. Fan. "Study on the Optimized Blanking Allowance for Fine-Blanking with Negative Clearance through Simulation and Optimization Methods." Advanced Materials Research 588-589 (November 2012): 1274–77. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.1274.

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Being an important blanking parameter, the blanking allowance of fine-blanking with negative clearance has a direct relationship with the quality of work piece and ejector force. The full process of fine-blanking with negative clearance for ASTM-1022 in different blanking allowances is simulated through the finite element analysis software DEFORM-2D, then the ejector force under different blanking allowances is measured through the experiment of fine-blanking with negative clearance. Based on the analysis of the ejector force, the proportion of burnish band and the work piece fracture, the following conclusions are summarized. The size of blanking allowance is not related with the blanking force with the sheet entering plastic state and the maximum blanking force, and is only related with the ejector force. When the value of the blanking allowance is between 0.1mm and 0.3mm, the friction force between the punch-die and the sheet affects ejector force, and the ejector force is not related with the mechanical properties of material. When the value of the blanking allowance is between 0.5mm and 0.8mm, with the blanking allowance increasing, the ejector force increases rapidly.

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37

Kim, Jong Deok, Young Moo Heo, and Si Tae Won. "A Study on the Clearance Design of Fine Blanking Tool for Al Special Parts with Various Inner Corner Shapes." Applied Mechanics and Materials 432 (September 2013): 288–93. http://dx.doi.org/10.4028/www.scientific.net/amm.432.288.

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Fine blanking is a press-working process that permits the production of precise finished components which are cleanly sheared through the whole cutting surface. It can be eliminated secondary operations, such as milling, grinding, etc. Recently, many studies on the weight reduction of automobile for fuel saving were underway. Especially, there are many examples in which light metal like Al were applied for automotive parts. The clearance between the punch and die of a fine blanking tool is an important design factor that affects the sheared surface of a product. In a fine blanking process, the clearance is typically assigned a 0.5% material thickness. If the clearance is too big, a fractured surface would occur in the product while if it is too small, bulging would occur. In this study, a setting for optimum clearance was proposed for inner corner shapes by checking shear characteristics and bulging effects according to various clearances. After designing a special part with various corner shapes possessing Al5052 (thickness: 4 mm), a fine blanking tool was constructed and fine blanking experiments were conducted. The result could be usefully applied in fine blanking processes for Al automobile parts with corner shapes in the future.

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38

Wesner, Thomas, and Pavel Hora. "Investigation of Scar Formation in Fine Blanking Processes and their Prediction in 3D ALE Simulations." Key Engineering Materials 622-623 (September 2014): 1181–90. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.1181.

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Scar formation in fine blanking was investigated by means of a particularly developed fine blanking tool and experimental evidence about significant the process parameters chamfer size of the blanking tools, V-Ring usage and clearance is given. Furthermore, a special purpose Finite Element code using the Arbitrary-Lagrange-Eulerian method with a process specific mesh generation is demonstrated and used for the determination of relevant parameters for prediction crack formation in 3D fine blanking simulations. The simulations shown, that a commonly used description of fracture strain as a function of stress and deformation state is not sufficient. In order to simulate scar occurrence on the blanking surface, the significant increase of fracture strain due to temperature rise because of plastic heat generation has to be taken into account. A possible way of measuring the temperature effect was shown in torsion tests at different initial temperature levels.

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39

Elyasi, Majid. "Force parameters and experimental characterisation in fine-blanking process." Advances in Materials and Processing Technologies 1, no. 1-2 (April 3, 2015): 234–42. http://dx.doi.org/10.1080/2374068x.2015.1121707.

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Yiemchaiyaphum, Suthep, Masahiko Jin, and Sutasn Thipprakmas. "Application of Back-Up Ring in Fine-Blanking Process." Key Engineering Materials 443 (June 2010): 140–45. http://dx.doi.org/10.4028/www.scientific.net/kem.443.140.

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Considering the advantages of the fine-blanking process, the smooth-cut surface without further operation could be fabricated. However, one of the major problems of the fine-blanking is the occurrence of the die-roll formation. This problem is the main factor which affects the quality of the fine-blanked parts. In this study, to reduce the amount of die-roll formation, the application of back-up ring was proposed. The finite element method (FEM) was used to investigate the effects of back-up ring. In addition, the effects of bridge width were also investigated. The FEM simulation results illustrated that the mechanism of back-up ring and the effects of bridge width could be theoretically clarified base on the material flow analysis. The FEM simulation and experimental results showed the good agreement with each other. Therefore, the application of back-up ring could reduce the amount of die-roll formation on the fine-blanked parts. In this study, the amount of die-roll formation increased as the bridge width increase and it was constant at the bridge width of over 15 mm.

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41

Zhao, Zhen, Xin-cun Zhuang, and Xiao-long Xie. "An improved ductile fracture criterion for fine-blanking process." Journal of Shanghai Jiaotong University (Science) 13, no. 6 (December 2008): 702–6. http://dx.doi.org/10.1007/s12204-008-0702-7.

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42

Zhu, Chun Dong, Wen Hao Zuo, and Bo Zhou. "Studies on the Technology of the Fine Blanking without Gear Ring of Steel Back Plate with Mechanics Properties and Material Properties." Applied Mechanics and Materials 252 (December 2012): 125–28. http://dx.doi.org/10.4028/www.scientific.net/amm.252.125.

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The steel back plate is one of the important parts of automotive friction brake block, and the current production technology is conventional blanking technology, which obtains only a low percentage of bright surface. The fine blanking without gear ring technology makes the steel back get a higher percentage of the bright surface. Based on finite element simulation, the effects of different outlines and different process parameters on the percentage of bright surface during fine blanking without gear ring of steel back plate were investigated in this paper. According to the results, the best process parameter in every single factor was obtained, which offers guide for the technology of the fine blanking without gear ring of steel back plate.

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43

Ding, Ri Xian, Chen Guo, and Sheng Wu Guo. "An Investigation of Fineblanked Surface of Cold-Rolled 45 Steel." Advanced Materials Research 97-101 (March 2010): 170–75. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.170.

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Fine-blanking process has been paid more and more attention for its shearing surface having low tearing-ratio, low roughness, low cost and high dimensional precision characteristics. It is not suitable for fine-blanking process if the carbon content of non-alloy steel is higher than 0.15% in the traditional view. Only the spheroidization is over 95%, the ideal shearing surface could obtain [1]. Methods of SEM and optical microscopy are used to research the tearing and metallographic characteristics in the region of the tearing of the shearing surface. With the help of the numerical simulation and micro-hardness testing, the tearing on the shearing surface and the shearing surface of fine-blanking is investigated. The conclusion is that without the spheroidizing annealing, 3mm thick cold-rolled 45 steel sheet having a clear flowing fiber of metallographic characteristic can get ideal shearing surface having such fine characteristics as small tear ratio, higher surface hardness and high surface finish by fine-blanking, with the help of optimized parameters from ANOVA and regression method, which considering the interaction between the height of the vee-ring indenter and the distance between vee-ring indenter and blanking contour. The present findings is great significant for expanding the scope of application of fine-blanking technology.

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44

Deng, Ming, Jiang Po Niu, Yi Long Ma, and Lin Lv. "Comparison of Different Extrapolation Models for Materials in the Closed-Extruding Fine Blanking Simulation." Advanced Materials Research 1145 (March 2018): 123–28. http://dx.doi.org/10.4028/www.scientific.net/amr.1145.123.

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The selection of the flow stress model of materials has a great influence on the plastic forming simulation of metal. For closed extrusion fine blanking, selecting the accurate and appropriate material flow stress model can make the finite element simulation closer to the real situation, and the simulation data is more reliable. In order to solve the accuracy problem of finite element simulation closed-extruding fine blanking, 5 types of flow stress fitting curve equations were obtained based on the data of sheet metal tensile test. With the secondary development of finite element software Deform-2D, the circular piece of closed-extruding fine blanking forming process was simulated, whose diameter is 14 mm and thickness is 30 mm. The simulation results of different rheological models were compared after physical experiment being carried out.The results show that Ludwik extrapolation rheological model is suitable for finite element simulation of closed-extruding fine blanking technology, which effectively improves closed-extruding fine blanking simulation accuracy. Lay the foundation for the application of closed-extrusion fine blanking in industry.

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Li, J. H., and Zhong Mei Zhang. "Study on Multi-Factor Blanking Parameters for Fine-Blanking with Negative Clearance through Simulation Optimization." Materials Science Forum 697-698 (September 2011): 377–82. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.377.

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The plastic analysis software DEFORM was used to simulate the blanking process of metal plastic without burr. Based on theory of the rigid FEM, the geometry model used for blanking with a negative clearance was established. The facts of influence the quality of the blanking work pieces were analyzed and concluded, at the same time, the parameters were indicated to improve the quality of the blanking work pieces. Through the experiment, the blanking load was measured with different clearance, thickness and material in group. The reciprocity between these facts was analyzed and the clearance was optimized. After the blanking load was regress analysis, the coefficient of the load and these facts were researched. Using quality analysis of the work pieces in the experiment, the thickness and the material were obtained which were suitable for blanking of metal plastic without burr. The reactions which were used to separate the metal were studied, which offered thereunder for proper remaining based on the better quality and smaller blanking load.

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46

Kim, Jong Deok, Young Moo Heo, Ho Keun Kang, and Si Tae Won. "An Experimental Study on the Clearance Design of Fine Blanking Tool for High-Strength Steel Special Parts with Various Inner Corner Shapes." Advanced Materials Research 706-708 (June 2013): 426–30. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.426.

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The clearance between the punch and die of a fine blanking tool is an important design factor that affects the sheared surface of a product. In a fine blanking process, the clearance is typically assigned a 0.5% material thickness. If the clearance is too big, a fractured surface would occur in the product while if it is too small, bulging would occur.In this study, a setting for optimum clearance was proposed for inner corner shapes by checking shear characteristics and bulging effects according to various clearances. After designing a special part with various corner shapes possessing SPFH590 (thickness: 4 mm), a high-strength steel material, a fine blanking tool was constructed and fine blanking experiments were conducted. The result could be usefully applied in fine blanking processes for high-strength steel automobile parts with corner shapes in the future.

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47

Zhang, Mei, Lin Hua, Yan Li Song, Hua Jie Mao, and Yan Xiong Liu. "Effects of Parameters on Fine Blanking of Steel Synchronizer Ring Teeth." Advanced Materials Research 941-944 (June 2014): 1671–77. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1671.

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The influences of parameters on fine blanking of steel synchronizer ring teeth have been studied in this paper. Based on the finite element (FE) analysis software DEFORM-3D, a three-dimensional FE model of fine blanking of steel synchronizer ring teeth was established. By analyzing the distribution of hydrostatic stress, the length of smooth cut surface and the height of die-roll, the influence of parameters (i.e., counterforce, blanking clearance and V-ring indenter form) on the cut surface of synchronizer ring teeth were discussed. The quantitative relationships between parameters and the cut surfaces were established. The results show that: Increasing counterforce, decreasing blanking clearance and V-ring indenter located on die are conducive to increase the length of smooth cut surface and to decrease the height of die-roll. These results have a certain guiding significance on the production process of fine blanking of steel synchronizer ring.

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48

Fan, Wei Fu, Jian Hua Li, and Zhong Mei Zhang. "Study on the Process of Pure Shearing and Fracture for AISI-1020 and AISI-1045 Blanking with Negative Clearance." Advanced Materials Research 135 (October 2010): 215–19. http://dx.doi.org/10.4028/www.scientific.net/amr.135.215.

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This paper carried through fine-blanking with negative clearance processing experiment with the AISI-1020 and AISI-1045 and obtained the work piece of fine blanking with negative clearance. The fractography photographs in the different deform regions of rollover zone, shearing band, fracture zone and under sheared surface were scanned by scanning electron microscope (SEM-JSM-6360LV). The research result indicates that the plastic flow of fine-blanking with negative clearance has been carried out to punch downspin, then jib at the place of allowance value, so that the length of work piece burnish band as much as possible to maximize and the length of the smooth shearing fracture could reach more than 90% thickness of the metallic sheet. Owing to the ejector negative direction blanking, the second burnish band could be formed in the process of ejecting and the work piece has no burr in the undermost sheared face. The place of fracture of fine-blanking with negative clearance has emerged into the middle of work piece, not into the sheared undermost. And the width of fracture band is very tiny, only 50-100 micron. The research result provides theoretic reference and the experimental data for the practice application. It has instructive significance and reference value to manufacturing application.

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Kim, Jong Deok, Young Moo Heo, and Si Tae Won. "A Study on the Clearance Decision of Fine Blanking Tool for Eco-Al Special Parts with Various Inner Corner Shapes." Applied Mechanics and Materials 392 (September 2013): 31–35. http://dx.doi.org/10.4028/www.scientific.net/amm.392.31.

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Fine blanking is a press-working process that permits the production of precise finished components which are cleanly sheared through the whole cutting surface. It can be eliminated secondary operations, such as milling, grinding, etc. Recently, many studies on the weight reduction of automobile for fuel saving were underway. Especially, there are many examples in which light metal like Al were applied for automotive parts. Eco-Al is the new material which is replaced Mg of aluminum alloy with Mg+Al2Ca, therefore Eco-Al material has improved mechanical properties and formability. The clearance between the punch and die of a fine blanking tool is an important design factor that affects the sheared surface of a product. In a fine blanking process, the clearance is typically assigned a 0.5% material thickness. If the clearance is too big, a fractured surface would occur in the product while if it is too small, bulging would occur. In this study, a setting for optimum clearance was proposed for inner corner shapes by checking shear characteristics and bulging effects according to various clearances. After designing a special part with various corner shapes possessing Eco-Al5052 (thickness: 4 mm), a fine blanking tool was constructed and fine blanking experiments were conducted. The result could be usefully applied in fine blanking processes for Eco-Al automobile parts with corner shapes in the future.

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50

Zheng, P. F., T. C. Lee, and L. C. Chan. "Application of a large-strain analysis technique to the combined fine-blanking and extrusion process." Journal of Strain Analysis for Engineering Design 40, no. 3 (April 1, 2005): 263–73. http://dx.doi.org/10.1243/030932405x15765.

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The characteristics of the combined fine-blanking and extrusion process are presented in this paper. A kind of large-strain analysis technique based on the experiment was introduced and improved, and a program for carrying out the improved technique was developed. With the mesh etching method and the developed program, the distorted mesh and the effective strain distribution on the meridian plane of the specimen were obtained. Consequently, the deformation law of the combined fine-blanking and extrusion process has been successfully revealed.

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Journal articles on the topic 'Fine blanking process'

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