Journal articles: 'Metal stamping'

1

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

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

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Wang, Xuan Zhi, and Syed H. Masood. "A Study on Tool Wear of Sheet Metal Stamping Die Using Numerical Method." Materials Science Forum 654-656 (June 2010): 346–49. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.346.

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Advanced high strength steels (AHSS) are increasingly used in sheet metal stamping in the automotive industry. In comparison with conventional steels, advanced high strength steel (AHSS) stampings produce higher contact pressures at the interface between draw die and sheet metal blank, resulting in more severe wear conditions, particularly at the draw die radius. The prediction of tool wear patterns for sheet metal stamping die is a highly challenging task as there are many control parameters involved in the production. This paper presents a numerical simulation methodology to analyse the influences of various control parameters on tool wear patterns of a sheet metal stamping die with different die radius arc profiles. The results of tool wear patterns provide informative guidelines for on-site production.

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Grocholski, Brent. "Stamping hydrogen into metal." Science 355, no. 6326 (February 16, 2017): 706.4–706. http://dx.doi.org/10.1126/science.355.6326.706-d.

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Baluch, Nazim, Nordin Norani, and Shahimi Mohtar. "AHSS Auto Structural Metal Stampings: Crucial Role of Lubricant." Applied Mechanics and Materials 590 (June 2014): 289–93. http://dx.doi.org/10.4028/www.scientific.net/amm.590.289.

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To improve crash worthiness and fuel economy, the automotive industry is, increasingly, using Advanced High Strength Steel (AHSS). However, in recent years, stampers, particularly those serving the automotive industry, have begun to face new challenges related to the increased use of AHSS. Stamping AHSS can push the capability limits of some lubricants and often cause lubricant film break down and galling thereby increasing scrap rate and tool maintenance cost. This paper discusses the advantages of AHSS in auto metal stampings, highlights the new challenges faced by stampers, and delineates the exigency of draw lubricant in producing high quality auto stampings from AHSS.

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Luo, Zhi Gao, Jun Li Zhao, Xu Dong Li, Jing Jing Zhang, and Ying Qing Shao. "FEM Simulation of Metal Drawing Parts Forming Based on the ABAQUS Software." Advanced Materials Research 628 (December 2012): 123–27. http://dx.doi.org/10.4028/www.scientific.net/amr.628.123.

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In this paper, metal stamping deep drawing forming process was simulated by Abaqus software. first of all, metal deep drawing forming for finite element modeling and analysis. Then the simulation results of drawing parts metal forming were analyzed. Include the analysis of stress-strain changes over time and the most serious regional. To determine the position easy to crack in the process of metal drawing parts stamping. Finally, by stamping test to verify the position of the cracks by punching test whether compliance with the simulation results. Verify the accuracy of the Abaqus software in the process of stamping simulation. Verify the accuracy of the Abaqus software simulation in metal forming processes.

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Čada, Radek, and Petr Tiller. "Evaluation of Draw Beads Influence on Intricate Shape Stamping Drawing Process." Technological Engineering 11, no. 1 (December 1, 2014): 5–10. http://dx.doi.org/10.2478/teen-2014-0001.

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Abstract Paper concerns evaluation of influence of shape, size and location of rectangular and semicircular draw beads on sheet-metal forming process. For analysis the simulations of forming process of selected two types of intricate shape stampings with similar ground plan and with approximately the same height from steel strip DC04 with the use of models of optimal blanks made by BSE (Blank Size Engineering) modul of simulation program Dynaform 5.7 were carried out. From simulations of forming process in simulation program Dynaform 5.7 followed that the most suitable is drawing without use of draw beads because cracks in stamping bottom corners do not arise. In the case of undesirable secondary waviness in the walls of intricate shape stamping the drawing with draw beads could be used but it would be necessary to increase the radius at the bottom of both stampings alternatively to choose another material with higher formability.

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Jiahao, Feng, Guo Pengyan, He Cunwu, and Liu Chengwei. "Parametric Analysis on Formability of SS304 Metal Bipolar Plate with Wave Flow Field Structure." Journal of Engineering Research and Reports 26, no. 1 (January 12, 2024): 62–78. http://dx.doi.org/10.9734/jerr/2024/v26i11063.

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The main production method of metal bipolar plate is stamping, and the size parameters of the flow field structure can not only change the performance of the fuel cell, but also affect the stamping quality of the metal bipolar plate. In the case of ensuring the performance of the fuel cell, it is necessary to study the stamping of the metal bipolar plate with different flow field structures. In the past, there were few studies on the wave flow field stamping forming. This paper analyzed the wave flow field, formulated several sets of bipolar plate structural dimension parameters, and evaluated the stamping forming quality of the reaction zone of SS304 metal bipolar plate through finite element simulation. By reducing the rib height ΔH=0.075mm in the corner part, the maximum thinning rate can be reduced from 34.833% to 24.689% and the thickness can reach 0.0753mm when the flow channel width S=1.0mm, the rib width W=1.5mm and the forming depth H=0.5mm. It provides some guidance for optimizing the structural dimension parameters of metal bipolar plates.

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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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Shang, Jianhui, and Glenn Daehn. "Electromagnetically assisted sheet metal stamping." Journal of Materials Processing Technology 211, no. 5 (May 2011): 868–74. http://dx.doi.org/10.1016/j.jmatprotec.2010.03.005.

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Arief, Rudi Kurniawan, Qomarotun Nurlaila, and Armila Armila. "Comparative Study of Conventional and Quick Die Change Stamping Process: The Issue of Setup Time and Storage." International Journal of Engineering Materials and Manufacture 3, no. 4 (December 1, 2018): 216–23. http://dx.doi.org/10.26776/ijemm.03.04.2018.06.

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Metal stamping industry has Quick Die Change (QDC) as a form of Single Minutes Exchange of Dies (SMED) as an efficient production technique where the implementation depends on operator’s activities, clamping system, accessories type and position, etc. This QDC could apply to improve the process efficiency, control of inventory and reducing the cost. This research compared the traditional metal stamping process and QDC System (QDCS) of metal stamping. This research was using Focused Group Discussion (FGD), direct observation and experiments, conducted in a private metal stamping company in wider Jakarta region of Indonesia. It was observed that the QDCS significantly reduces setup time, storage space and the cost. The setup time and cost reduced to one third of the conventional and the requirement of storage decreased by 70%. In addition, QDCS reduces the waste significantly.

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11

Fan, Ya Ping. "Sheet Metal Cover Drawing Forming Process Analysis." Advanced Materials Research 971-973 (June 2014): 191–95. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.191.

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With the rapid development of finite element technique and computer technology, the design of the cold punching mould CAD / CAM with CAE analysis is changing the way that traditional craft manufacture mold, especially the development and application of stamping simulation software, make the stamping die design and processing and quantitative, can advance analysis of stamping process program, finally got the ideal pressing parameter, realize the automation of design, save resources and reduce the dependence on experience and reduce the demand for skilled workers. Based on nonlinear dynamic finite element software ANSYS / ls-dyna continuous function, simulation of sheet metal forming process and unloading plate deformation, forming process, at any time throughout the von mises stress nephogram should rebound results and strain value and unloading plate materials, help us better analysis to understand the changes of the internal material sheet metal stamping process.

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Yu, Li Ming, Xi Liang Chen, and Yang Yang. "The Stamping Process Simulation of Plate Using CAE Technology." Advanced Materials Research 538-541 (June 2012): 901–4. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.901.

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Stamping process of sheet metal is widely used in the automobile industry. How to improve the quality of plate molding is a challenge for stamping process workers. With the development of the numerical analysis method and the computer technology, Computer Aided Engineering (CAE) technology is widely applied in the industrial areas. As the CAE technology comes up, a qualitative change has happened in the stamping process of automobile sheet metal parts. This paper presents one stamping process simulation of auto rearview mirror installation plate by using the software DYNAFORM.

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13

Gong, Hong Ying, Jin Yan Wang, and Zhong Hua Zhao. "Study on the Springback Characteristics of CR340LA Steel during the Typical Auto Part Stamping Process." Advanced Materials Research 322 (August 2011): 98–101. http://dx.doi.org/10.4028/www.scientific.net/amr.322.98.

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Metal sheet Stamping forming is an important material forming process, especially in the automobile industry. Using the advanced FEM simulation technology, precise analysis of the metal sheet stamping forming process becomes possible, which provides the scientific evaluation of the process design and die design in sheet stamping forming. So the paper chooses a topical auto drawing part-auto indoor-still part and applied the CR340LA steel to have stamping numerical simulation test by the numerical simulation analyzing software-Dynaform. In the stamping numerical simulation test, the best binder holder force values, stamping speed values and the spring back forecast results are got. Then the springback forecast results of the numerical simulation analysis tests are applied to the actual production to overcoming the spring back effectively, and the successful products are got.

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14

Wang, Xuan Zhi, and S. H. Masood. "Optimisation of Die Radius Geometry in Sheet Metal Stamping." Advanced Materials Research 337 (September 2011): 350–53. http://dx.doi.org/10.4028/www.scientific.net/amr.337.350.

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Advanced high strength steels (AHSS) are increasingly utilised in sheet metal stamping in the automotive manufacture. In comparison with conventional steels, AHSS stampings produce higher contact pressures at the interface between the tool-workpiece interface, leading to more severe wear conditions, particularly at the draw die radius. To minimise tool wear using this approach it would be necessary to optimise the shape for a particular combination of circular and high elliptical profiles. This paper presents a methodology to optimise a die radius profile. For this, a specialised software routine is developed and compiled for optimisation of die radius profiles to minimise or achieve uniform contact pressure (wear distribution) using Python computer programming language supported by Abaqus software. A detailed algorithm for the optimisation is explained. A case study based on the algorithm is also discussed.

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15

Zeng, Rong, Liang Huang, and Jian Jun Li. "Fracture Prediction in Sheet Metal Stamping Based on a Modified Ductile Fracture Criterion." Key Engineering Materials 639 (March 2015): 543–50. http://dx.doi.org/10.4028/www.scientific.net/kem.639.543.

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Sheet metal stamping is an important manufacturing process because of its high production rate and low cost, so the fracture prediction of stamping parts has become important issues. Recent experimental studies have shown that the quality of stamping parts can be increased by using ductile fracture criteria. This paper proposed a modified ductile fracture criterion based on the macroscopic and microscopic continuum damage mechanics (CDM). Three-dimensional (3D) explicit finite element analysis (FEA) are performed to predict the fracture behaviors of sheet metal stamping process. An approach to determine the material constants of modified ductile fracture criterion is presented with the help of uniaxial tensile tests and compressive tests. The results show that the modified ductile fracture criterion enables precise cup depth and fracture location of sheet metal stamping under nonlinear paths. Compared with typical ductile fracture criteria, the results predicted with modified ductile fracture criterion correlate the best with the experimental data.

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16

Zeng, Xin, Bi You Peng, Lin Zhi Liao, and Yan Kui Cheng. "Application Research and Analysis of Bending Springback of Semi-Circular Arc Stamping Parts Based on DYNAFORM." Applied Mechanics and Materials 543-547 (March 2014): 3931–34. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.3931.

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Springback in the sheet metal stamping technology is a hot research subject in the sheet metal forming field. This article takes the semi-circular arc stamping parts as the objects of research. It aims at improving precision of the flanging forming parts and decreasing the bending springback. It analyzes the forming technology and deformation characteristics of flanging forming theoretically. Besides, it adopts the numerical simulation method to carry out research on the key factors influencing the forming process of semi-circular arc stamping parts (flanging and then bending) and the springback deformation, in order to find out the optimum production process scheme for semi-circular arc stamping parts.

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Lan, Jian, Yu Liu, Xi Wei, and Lin Hua. "The Thin Sheet Metal Rubber Pad Stamping for PEM Fuel Cell." Advanced Materials Research 150-151 (October 2010): 1732–40. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.1732.

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Bipolar plate is the key component of proton exchange membrane (PEM) fuel cell and represents a significant part of the overall cost and the total weight in a fuel cell stack. The thin sheet metal, with usually 0.1~0.3mm thickness, deformed to bipolar plate with flow channel 0.5~2mm width and depth, by rubber pad stamping can reduce the cost greatly. The rubber pad is simulated by solid element and hydraulic pressure respectively. Experiment shows that the hydraulic pressure can simulate the rubber pad. The thin sheet metal is modeled by solid element and shell element respectively. Considering thin sheet metal material size effect, the shell element cannot simulate the thin sheet metal stamping process because of small corner radius. Modeling rubber pad by hydraulic pressure and thin sheet metal by solid element, the simulation of the rubber pad stamping process shows that 1) the sheet metal in channel appears large uneven strain with high stress; 2) convex fillet make the sheet metal two direction tensions and should keep large fillet corner. Those simulations are validated by experiments. The research on rubber pad stamping will improve the understanding of this micro forming process and provide design guide of flow channel.

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18

Yan, Wen Yi, Michael P. Pereira, and Bernard F. Rolfe. "Tool Wear in Sheet Metal Stamping." Advanced Materials Research 421 (December 2011): 750–53. http://dx.doi.org/10.4028/www.scientific.net/amr.421.750.

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This paper discusses our recent research on wear at the die radius in sheet metal stamping. According to wear theory, contact pressure and sliding distance are the two dominant factors in determining sliding wear. We applied the finite element analysis to accurately quantify the contact pressure and sliding distance at the die radius in sheet metal stamping. The results were then applied to analyze sliding wear at the die radius. We found that a typical two-peak steady-state contact pressure response exists during a channel forming process. The steady-state contact pressure response was preceded by an initial transient response, which produced extremely large and localized contact pressures. We proposed a method to numerically quantify the sliding distance, which was applied to examine the contact sliding distance at the die radius. Correlating the contact pressure and sliding distance, a new insight into the wear/galling that occurs at the die radius in sheet metal stamping was gained. The results show that the region close to zero degrees on the die radius is likely to experience the most wear, with the identified transient stage contributing to a large proportion of the total wear.

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Doolan, M. C., S. Kalyanasundaram, P. Hodgson, and M. Cardew-Hall. "Identifying variation in sheet metal stamping." Journal of Materials Processing Technology 115, no. 1 (August 2001): 142–46. http://dx.doi.org/10.1016/s0924-0136(01)00754-3.

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20

Sabella, S., S. Shiv Shankar, G. Vecchio, V. Brunetti, L. Rizzello, A. Qualtieri, L. Martiradonna, R. Cingolani, and P. P. Pompa. "Room-temperature metal stamping by microfluidics." Materials Letters 64, no. 1 (January 2010): 41–44. http://dx.doi.org/10.1016/j.matlet.2009.09.066.

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Zhao, Pengjing, Qi Wu, Yo-Lun Yang, and Zhanghua Chen. "Process Optimization of the Hot Stamping of AZ31 Magnesium Alloy Sheets Based on Response Surface Methodology." Materials 16, no. 5 (February 24, 2023): 1867. http://dx.doi.org/10.3390/ma16051867.

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Hot stamping is an important manufacturing process for sheet metal parts. However, it is easy to produce defects such as thinning and cracking in the drawing area during the stamping process. In this paper, the finite element solver ABAQUS/Explicit was used to establish the numerical model of the magnesium alloy hot-stamping process. The stamping speed (2~10 mm/s), the blank-holder force (3~7 kN), and the friction coefficient (0.12~0.18) were selected as the influencing factors. Taking the maximum thinning rate obtained through simulation as the optimization objective, the response surface methodology (RSM) was applied to optimize the influencing factors in sheet hot stamping at a forming temperature of 200 °C. The results showed that the maximum thinning rate of sheet metal was most influenced by the blank-holder force, and the interaction between the stamping speed and the blank-holder force/friction coefficient had a great influence on the maximum thinning rate. The optimal value of the maximum thinning rate of the hot-stamped sheet was 7.37%. Through the experimental verification for the hot-stamping process scheme, the maximum relative error between the simulation and the experimental results was 8.72%. This proves the accuracy of the established finite element model and the response surface model. This research provides a feasible optimization scheme for the analysis of the hot-stamping process of magnesium alloys.

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Du, Han Bin, Ping Ye, Da Zhi Wang, and Xiao Dong Tang. "Study on Accuracy Improvement of Vehicle Crash Simulation Considering Stamping Effects." Advanced Materials Research 139-141 (October 2010): 532–35. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.532.

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It is general preferable to consider stamping effects of sheet metal forming for vehicle crash simulation nowadays. However, the present approaches for stamping simulation and coupling forming results to crash finite element model require massive pre-works. To overcome these difficulties, an inverse method for rapid and simple stamping simulation using HYCRASH is introduced, where crashworthiness analysis of front side rail under frontal crash was used as an example in this study. A detailed stamping simulation by AUTOFORM is used for comparison, also accompanied with the one without stamping effects. Through comparison of stamping results and frontal crashworthiness performance, it is concluded that effective plastic strain makes more contribution on simulation accuracy than thickness reduction, and HYCRASH shows an attractive approach for stamping analysis than AUTOFORM coupled in crash simulation in the context of computational cost.

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Wang, Jin Ling. "Based on the Finite Element Software ANSYS/LS-DYNA Metal Plate Covering Parts Forming Process Simulation and Optimization Research." Advanced Materials Research 912-914 (April 2014): 589–92. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.589.

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The design of cold punching mould CAD/CAM and the combination of CAE analysis can advance analysis of stamping process program, eventually get ideal stamping parameters, realize design automation, save resources and reduce dependence on experience, reduce the demand for skilled workers. This paper, by using nonlinear dynamic finite element software ANSYS/ls-dyna continuous function, simulation of sheet metal forming process and unloading plate deformation, forming process, at any time throughout the von mises stress nephogram should rebound and strain values and unloading plate material as a result, analysis help us better understand the changes of the internal material sheet metal stamping process.

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24

Doronin, S. V., and E. M. Reizmunt. "COMPUTATIONAL MODEL OF THE MECHANICAL INTERACTION OF THE STAMPING BOX AND THE COAL CHARGE." Dynamics of Systems, Mechanisms and Machines 10, no. 1 (2022): 24–30. http://dx.doi.org/10.25206/2310-9793-2022-10-1-24-30.

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Due to the need to increase the stiffness and dynamic characteristics of the box, the density and strength of the coal cake during stamping in the process of preparing the coal charge for coking, the force inter-actions of the elements of the mechanical system "stamping units - coal charge - the metal structure of the stamp-ing box" were studied in the work. For static and dynamic analysis of the mechanical behavior of the box as a part of the charging machine of coke ovens, a computational model of the mechanical interaction of the stamping box metal structure and the coal charge has been developed and tested.

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Jiang, Xiao Ming, Chun Lai Hu, and Wang Sheng Liu. "Whole Search Method of Space Sub-Domain of Sheet Metal Stamping." Advanced Materials Research 675 (March 2013): 244–47. http://dx.doi.org/10.4028/www.scientific.net/amr.675.244.

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In the machining industry, sheet metal stamping is an important method of metal forming, and stamping die forming quality depends on the structure and process design, the use of finite element technology(FEM), computer simulation of sheet metal forming process, forming the law and indicates that there defects in order to achieve the most optimal design. This article describes the increased exposure to whole search to determine the finite element calculation speed and accuracy of a new method— space sub-domain method.

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Yang, Tung Sheng, Ting Fu Zhang, Tung Wei Lin, and Can Xun Zhang. "Study on Stamping Process of 304 Stainless Steel Bipolar Plate." Key Engineering Materials 901 (October 8, 2021): 170–75. http://dx.doi.org/10.4028/www.scientific.net/kem.901.170.

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Bipolar plate is the key component of proton exchange membrane fuel cells. Due to the factors of rapid and mass production, the stamping process is selected to manufacture the bipolar metal plates. First, the stress-strain curve is performed by universal material testing machine.The stress-strain curve is necessary for bipolar plate stamping simultion. The maximum forging load and effective stress distribution of bipolar plate stamping are determined by finite element analysis. Finally, the effect of the traditional crank stamping on the flatness and section thickness of stainless steel bipolar plate are observed by experiments.

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Orłowicz, A. W., M. Mróz, Z. Cisek, M. Tupaj, A. Trytek, B. Kupiec, M. Korzeniowski, K. Sondej, and L. Kozak. "Determination of Unit Pressure Force in Material Volume in the Course of Refractory Stamping Press Moulding." Archives of Foundry Engineering 16, no. 2 (June 1, 2016): 61–68. http://dx.doi.org/10.1515/afe-2016-0027.

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Abstract The paper presents results of assessment of the unit pressure force within the refractory material volume in the course press-moulding of stampings for refractory precast shapes. The force was evaluated with the use of physical simulation of deformation undergone by lead balls placed in the raw refractory mass subjected to pressing in a metal die. To determine the value of unit pressure force applied to the aggregate grains in the course of stamping press-moulding, physical model of deformation of a sphere induced by the uniaxial stress state was used.

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Wang, Jiang Tao, Ming Qian Shen, Tao Xue, and Guo Hong Dai. "Numerical Simulation of Punching Bonding Based on AutoForm." Advanced Materials Research 189-193 (February 2011): 3423–26. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3423.

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Punching bonding made for study context and Autoform selected for platform, numerical simulation of stamping was carried under different shapes, different materials, different parameters, and the different simulation results was gained . And deformation, the thickness of the forming limit analysis of simulation results, etc., and thus such important parameters as the thickness of sheet metal, punch diameter, the speed and the size of power punching and etc.,was modified and debuged, the combination of optimized process parameters of sheet metal was achieved in the final. Therefore, AutoForm not only can be used to overcome the difficulties,which there is no standard available, relying on repeated experiments to determine the parameters of the connected so as to achieve green design stamping; but also be made for stamping die design and production of connections to increase the efficiency and the expansion of the stamping connections the scope of the application.

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He, Zhubin, Qingsong Zhao, Kun Zhang, Jian Ning, Yi Xu, and Xianggang Ruan. "Study on Stamping–Bulging Process of Thin-Walled Superalloy Diaphragm for S-Shaped Bellows." Materials 17, no. 12 (June 10, 2024): 2829. http://dx.doi.org/10.3390/ma17122829.

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A combined stamping–bulging forming process was proposed to achieve high-precision forming of large-diameter, ultra-thin-walled, superalloy welded S-type corrugated diaphragms. The underlying principle is to enhance the diaphragm’s forming accuracy by increasing the plastic deformation region and reducing springback. Using the ABAQUS version 6.14 finite element analysis software, finite element models were constructed for the stamping, hydraulic bulging, and combined stamping–bulging forming processes of the welded S-type metal corrugated diaphragms. A comparative analysis was conducted on the forming processes of the welded S-type metal corrugated diaphragms under the three forming methods, focusing on equivalent stress, distribution of wall thickness, and forming accuracy. This analysis determined the optimal forming process and the corresponding process parameters for superalloy welded S-type metal corrugated diaphragms. The results show that under a constant drawing force, as the bulging pressure increases, the plastic deformation of the straight sections of the diaphragm becomes more pronounced, resulting in improved shape accuracy. The combined stamping–bulging forming process guarantees the highest degree of shape accuracy for the diaphragm. The optimal process parameters were identified as a 30 t force and a 5 MPa pressure, with a maximum shape error of 0.02 mm. Concerning a plate thickness of 0.3 mm, the maximum deviation rate was found to be 6.7%, which represents a 30% improvement over traditional stamping processes. The maximum wall thinning rate was found to be 3.3%, a 1% reduction compared to traditional stamping processes, confirming the process’s feasibility.

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

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Ottosson, P., J. Pilthammar, D. Wiklund, T. Skåre, and M. Sigvant. "Substitutive models of press deflections for efficient numerical die cambering." IOP Conference Series: Materials Science and Engineering 1284, no. 1 (June 1, 2023): 012060. http://dx.doi.org/10.1088/1757-899x/1284/1/012060.

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Abstract Cost and time for stamping die tryouts are significant within the car industry. A major contributing factor is that elastic deflections of stamping dies and presses are usually not considered during the virtual die design and forming simulation phase. Active surfaces of stamping dies are only cambered based on previous experiences of tool types and stamping presses. However, almost all stamping dies and presses are unique, and available experiences are not valid for new sheet materials. This leads to component deviations and often several loops of tool adjustments are needed. Previously partners within the SMART Advanced Manufacturing research project CAMBER have developed advanced deflection measuring devices to quantify the elastic deformations of stamping presses. Using these measurements, cambering methodologies can be utilized in sheet metal forming simulations. In this paper numerical substitutive stamping press models are described which are capable of compensating for measured stamping press dynamics. The result show that a numerical compensated tool can improve the contact by over 80% compared to the corresponding contact without compensation.

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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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Kong, Ling, and Yan Peng. "In situ observation on microstructure evolution of 22MnB5 in hot stamping process." Metallurgical Research & Technology 116, no. 2 (2019): 209. http://dx.doi.org/10.1051/metal/2018082.

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High temperature confocal laser scanning microscopy (CLSM) was used to investigate the microstructure evolution of high-strength boron steel 22MnB5 during hot stamping. The experimental results show that it is complete austenitized at temperatures about 810 °C during the heating process. Most of the initial austenite grain size is small and locally coarse. At 920 °C to 1000 °C, the phenomenon of B remelted and solidified was observed which played a very good pinning role at the austenite grain boundary, preventing coarsening of austenite grains. The segregation of B and the addition of Mn result in a significant reduction in both the minimum boron reverse melt content and the final solidification temperature. In the continuous cooling stage, martensitic transformation occurs at the cooling rate of 60 °C/s, and the martensite start point is 400 °C and martensite finish point is 280 °C. A large number of bursts are concentrated from 380 °C to 330 °C. There are two main forms of martensitic transformation: first, martensite begins to appear at the coarse austenite grain boundary, and grows transgranularly. Second, the new martensite laths starts from the previously formed laths and grows at a certain angle into the austenite grains. The main factor in the increase of martensite in continuous cooling is the formation of variable temperature martensite rather than the growth of martensite laths. At the cooling rate of 20 °C/s, the bainite and ferrite transformation appeared and the conversion temperature of bainite was about 600 °C. The cooling speed has a great influence on the performance of the 22MnB5 hot stamping component. The room temperature microhardness at cooling rates of 5 °C/s, 20 °C/s, and 60 °C/s was 194 HV, 243 HV, and 430 HV, respectively. Therefore, ensuring sufficient cooling rate is a key condition for obtaining ultra-high strength hot stamping components.

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Liu, Xue-yan, Xing Han, Huan Cheng, Xi-Tao Yin, Rui Guo, Xue-fei Zhao, and Qi Wang. "Coal blend properties and evaluation on the quality of stamp charging coke from weakly coking blends." Metallurgical Research & Technology 115, no. 4 (2018): 421. http://dx.doi.org/10.1051/metal/2017043.

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Stamp charging coking can use weakly coking coal effectively, which can cut the cost for iron and steel enterprises. However, the quality of stamp charging coke has been debated due to lower CSR index. In this paper, the correlation between blend coking properties and quality indices of stamp charging coke is given out through statistical analysis of data from coking production, the effect of blend properties and stamping on the properties of stamp charging coke is estimated through microstructure, and the strength after reaction of stamp charging coke is evaluated through temperature dependence of reacted coke strength and BF smelting. The results show that the stamping permits to use the weakly coking blend with lower G index without impairing the M10 and M40 indices, but the CSR index is decreased. Meanwhile, the reason that the stamp charging coke with lower CSR index can also be used smoothly in BF is presented. The present works are significant to guide the blending of increasing weakly coking coal and evaluate reasonably the quality of stamp charging cokes.

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Li, Xinqi, and Shicheng Hu. "Numerical Simulation and Experimental Research on Multi-Point Forming of Aluminum Alloy Sheets Based on Ultrasonic Vibration." Mathematical Problems in Engineering 2022 (August 23, 2022): 1–11. http://dx.doi.org/10.1155/2022/7688376.

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In this study, the multi-point plastic forming of 2024-O aluminum alloy sheets is the research object, ultrasonic vibration-assisted forming is applied in the stamping process, a combination of ABAQUS/EXPLICITE numerical simulation and theory is used, and multi-point forming experiments are performed to verify the research. In the process of multi-point forming, the influence of ultrasonic vibration on the plastic deformation and springback of sheet metal has inspired a new idea and method for multi-point forming of sheet metal. This paper presents the following: the basic theory of multi-point stamping and ultrasonic vibration-assisted metal sheet plastic forming; a comparison of the material parameters of the multi-point stamping method with and without ultrasonic vibration; the influence of different times on the results; the changes in parameters such as stress and strain at different frequencies; and the effect of its springback.

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Zhang, Ling Yun, Ya Lin Pan, and Zhen Jun Li. "Research on the Forming Process of the Y-Shaped Tube Based on ABAQUS." Advanced Materials Research 602-604 (December 2012): 1942–45. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1942.

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ABAQUS software is used to simulate the stamping process of the Y-shaped tube to study the feasibility of stamping forming. The simulation results are analyzed to study how fabrication holes affect the ability of sheet metal forming. The results show that it is possible to form the Y-shaped tube by stamping; fabrication holes with reasonable size and location can improve the distribution of stress and strain, and enhance the limit deformation ability of the sheet.

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Cai, Gan Wei, Xi Yong Xu, Zhan Guang Zheng, Zhuan Zhang, and Du Chao Wu. "Numerical Simulation and Process Optimization for Multi-Stage Forming of Wheel Centre Disc." Advanced Materials Research 189-193 (February 2011): 2770–74. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2770.

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The steel wheel centre discs are usually stamped by multi-stage sheet metal forming. The stage number and the content of every stage decide if the structure-pieces can be formed successfully and the final forming quality. In this paper, the forming characteristics of wheel centre disc were analyzed firstly and the reasonable two-stage stamping scheme of drawing and inverse-drawing are adopted. The numerical simulations of multi-stage stamping process are performed and connected together through deformation transmission. By means of FLD and changes of sheet metal chickness, the formability is analyzed and the forming process is optimized. The feasibility of multi-stage forming process simulation and the validity of the optimized scheme were verified by stamping in practice.

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Hirsch, Martin, Peter Demmel, Roland Golle, and Hartmut Hoffmann. "Light Metal in High-Speed Stamping Tools." Key Engineering Materials 473 (March 2011): 259–66. http://dx.doi.org/10.4028/www.scientific.net/kem.473.259.

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The required number of punched and blanked parts in the electronic industry, such as leadframes, contact pins or plugs often reach several million pieces. According to this, the production process has been sped up to frequencies up to 2000 parts per minute. At this production rate parts of thin steel or copper sheets are produced with high-speed stamping presses and blanking tools. Because of the high gating velocities in the blanking tool there is a recurring acceleration at the moment, when the blank holder contacts the sheet metal. A second shock in the blanking tool arises, when the sheet cracks. This is also known as the impact shock during the blanking process. Trough these two impulses and through the cycle of the plunger movement a periodic oscillation arises in the tool. Horizontal vibrations can lead to an undefined position between punches and die-plate, while vertical movement leads to increased wear because of friction forces between the blanked surface and the lateral area of the punches. The goal of this project was to minimize these oscillations in cutting tools by the usage of lightweight materials in the flux of forces. An experimental cutting tool was designed with alternative top and bottom plates for the comparison of the oscillation status in the cutting process when using plates of steel, aluminium or magnesium. The centre plate of the tool remains constant. Experiments were accomplished for several velocities and tool setups with different plate materials. To determine the influence of the materials with different density and elasticity acceleration, force and acoustic emission sensors were integrated in the tool. The set of problems was investigated by analyzing the measured data and by determining the wear in practical tests.

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Boonkanit, Prin, and Sansak Parklumjiek. "The Improvement of Metal Stamping Procurement Process." Applied Mechanics and Materials 848 (July 2016): 255–58. http://dx.doi.org/10.4028/www.scientific.net/amm.848.255.

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This research is aimed to improve procurement process in supply chain management with the capability to reduce environmental effect by lean production technique, and 3Rs principle, and to improve supply chain by SCOR model. The research methodology, Value Stream Mapping (VSM)is used to analyze the development of on time delivery of suppliers, and then SCOR model is applied to improve and reduce energy consumption and recycle material in supply chain. The result has been revealed that new development process could be improved on time delivery rate from 38.51% to 93.80%. This procurement process has reduced frequency of supplier's transportation from 40 to 29 times per month so it could reduce fuel consumption on average cost of 45,230.98 Baht per year, packaging cost on average of 158,295.11 Baht per year and reduce total GHG emission about 20.896TCo2e per year. Therefore,the new process can improve supply chain and being environmental friendly or sustainable green supply chain management.

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SUZUKI, Tomohiko. "Technology Trends of Metal Stamping Automation Equipment." Journal of the Japan Society for Technology of Plasticity 49, no. 568 (2016): 352–56. http://dx.doi.org/10.9773/sosei.49.352.

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Suzuki, Yohei, Tomomi Shiratori, Masao Murakawa, and Ming Yang. "Precision stamping process of metal micro gears." Procedia Manufacturing 15 (2018): 1445–51. http://dx.doi.org/10.1016/j.promfg.2018.07.336.

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Pereira, Michael P., and Bernard F. Rolfe. "Temperature conditions during ‘cold’ sheet metal stamping." Journal of Materials Processing Technology 214, no. 8 (August 2014): 1749–58. http://dx.doi.org/10.1016/j.jmatprotec.2014.03.020.

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Karima, M., N. Chandrasekaran, and W. Tse. "Process signatures in metal stamping: Basic concepts." Journal of Materials Shaping Technology 7, no. 3 (September 1989): 169–83. http://dx.doi.org/10.1007/bf02834747.

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Venema, Jenny, Javad Hazrati, David Matthews, and Ton van den Boogaard. "An Insight in Friction and Wear Mechanisms during Hot Stamping." Key Engineering Materials 767 (April 2018): 131–38. http://dx.doi.org/10.4028/www.scientific.net/kem.767.131.

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Hot stamping is often used in the automotive industry to combine formability and strength. However, during forming process at high temperatures, friction and tool wear are determining factors that can affect the efficiency of the whole process. The goal of this paper is to investigate the effects of temperature on the local coefficient of friction and tool wear and to provide an insight in the phenomena which take place at the tool-sheet metal interface during hot stamping processes. For this purpose, hot friction draw tests between uncoated tool steel and Al-Si coated press hardening steel were carried out at several temperatures between 500-700°C. Consecutive tests were performed to mimic industrial hot stamping process and to investigate the effect of tool wear on the friction phenomenon. Finally, tool-sheet metal tribological behavior and the interaction between the friction and tool wear mechanisms were analyzed using different imaging and chemical characterization techniques. The results show that several stages can be distinguished at the interface between tool and sheet metal coating during hot stamping: flattening due to initial normal contact, ploughing of tool asperities through coating, secondary ploughing in the coating by adhered material on the tooling, and abrasive wear in the tool by embedded particles in the sheet metal coating. Furthermore, tool wear shows some major differences in the temperature range of 500-700°C. At high temperature a larger abrasive area and more severe compaction galling occurs that can be explained by material properties of Al-Si coating at elevated temperatures. The results of this study can be used for more efficient process design and a more realistic modelling of the hot stamping process.

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Moghadam, Marcel, Chris Valentin Nielsen, and Niels Bay. "Analysis of the risk of galling in sheet metal stamping dies with drawbeads." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 234, no. 9 (April 15, 2020): 1207–14. http://dx.doi.org/10.1177/0954405420911307.

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Sheet metal stamping of complex geometries normally involves the use of drawbeads to control the metal flow in the forming die. Drawbeads are, however, often the most tribologically severe part of the stamping dies. Selection of a suitable tribosystem for this type of forming operation depends on parameters such as local contact pressures, sliding speed, tool/workpiece interface temperature, tool and workpiece materials, and surface topographies. Furthermore, it depends on the required tool life and acceptable maintenance costs. This study demonstrates a methodology for offline evaluation of tribosystem applicability for a specific production platform for stamping of a three-dimensional component using a forming die with drawbeads. Based on an industrial case study, this work combines experimental and numerical analyses of the risk of galling in the different regions of an industrial forming die.

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Застела, А. Н., and В. В. Борисевич. "МОДЕЛЮВАННЯ ПРОЦЕСІВ ВИРУБКИ-ПРОБИВКИ ПЕРЕДАВАЛЬНИМИ СЕРЕДОВИЩАМИ." Open Information and Computer Integrated Technologies, no. 93 (November 19, 2021): 104–11. http://dx.doi.org/10.32620/oikit.2021.93.05.

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During improvement of the quality of products and reducing its cost, sheet metal stamping production, being the basis for the aerospace industry, should more intensively introduce modern production technologies, especially design. There are a large number of factors influencing the stamping process (especially parts with complex geometry), more comprehensive consideration of which would allow to optimize such processes, thereby reducing the manufacturing cost and improving the quality. Currently the processes of forming and separation of complex parts by of an elastic pad are of interest from the point of view of optimization and the final determination of the nature of the behavior of the material. This includes the refinement of such parameters as the maximum permissible thinning, the strength of the die. Clarification of these and other parameters will significantly reduce energy required. Determination of these and other parameters of sheet metal stamping is possible due to application of the modern analysis methods. For numerical studies in the sheet stamping production, the variational method or FEM is the most suitable. Computer modeling makes it possible to investigate the behavior of the material, the kinematics of the workpiece movement during forming process, select the correct loading scheme for the workpiece, and also makes it possible to consider several options for the location of the workpiece in the die, which is very important for stamping thin sheet metal blanks. It provides a significant reduction of the time and costs for carrying out natural experiments, and decrease of technological preproduction preparation of sheet metal stamping. The development of a mathematical model based on the FEM makes it possible to determine not only the required parameters of the process, but also to consider the forming process during its certain stages, to determine the stress-strain state, indicating at the same time the problem zones of excessive thinning, loss of stability, the need to apply a die with a back pressure for cutting of thin sheet metal blanks. It allows to evaluate the quality of a ready product according to the calculated parameters, to use the results obtained for the design of elastic pad

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Belov, V. K., E. V. Gubarev, O. V. Krivko, A. V. Papshev, and N. G. Hofman. "Identify the causes of coating dusting when stamping hot-dip galvanised sheet metal parts." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 79, no. 3 (April 20, 2023): 231–40. http://dx.doi.org/10.32339/0135-5910-2023-3-231-241.

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Dusting the zinc coating when stamping car bodies results in coagulated dust particles (lumps) that are imprinted on the bodywork surface. A visual check is always carried out after the last stamping operation to prevent such a defect. If a defect is detected, the entire stamping line is stopped and the die is cleaned or, even worse, replaced. In order to clarify the causes of dusting, the chemical composition X-ray microanalysis of dusting particles was performed, 3D dimensions of these particles were determined and they were compared with the rough surface dimensions of the automotive sheet. It is shown that the hypothesis about occurrence of dusting particles as a consequence of shearing roughness of the zinc coating during stamping should be considered unlikely. Another mechanism for dusting zinc coating was considered. A study of surface roughness formation during uniaxial deformation showed that these pro-cesses of bare metal and zinc-coated metal differ significantly. These differences can provoke another type of zinc coating failure as a process of loosening the metal-zinc coating boundary, which has not been considered so far. This type of fracture can be avoided if the discussed experimental dependences of micro topographic characteristics on elongation in the coating and in the substrate lack such radical difference

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Dou, Shasha, and Jiansheng Xia. "Analysis of Sheet Metal Forming (Stamping Process): A Study of the Variable Friction Coefficient on 5052 Aluminum Alloy." Metals 9, no. 8 (August 3, 2019): 853. http://dx.doi.org/10.3390/met9080853.

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Under a boundary lubrication regime, the effect of sliding velocity and normal loads on the friction coefficient in the sheet metal stamping process was investigated using a pin-on-disk sliding wear test. Software was used to analyze both the data generated and the friction coefficient; in addition, a variable friction model based on different velocities and normal loads was also initiated. Under different experimental conditions and numerous influences, both the analysis and microtopography examination of sheet metal helped to obtain the mechanism influence on the friction coefficient. Through further analysis of the microtopography of sheet metal, the law of the surface roughness of sheet metal after grinding with stamping die was established. The model was established to simulate the thickness distribution and spring-back of U-bend parts using ABAQUS software. The results show that the friction coefficient values between the sheet metal and the stamping die generally decrease with increasing sliding velocity and normal loads, and the decreasing tendency slows down under a higher sliding velocity and normal load. Furrow wear and abrasive wear are the main wear mechanisms, with slight sticking wear under the boundary lubrication; the surface roughness after grinding with stamping die generally increases with increasing normal loads and decreasing sliding velocity. The predicted results of thickness distribution with a constant friction coefficient of 0.1 and with the variable friction coefficient model are more consistent with the actual measured values, but the predicted accuracy of spring-back in the variable friction coefficient model is higher than that of the constant friction coefficient model.

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Zhang, Ming He, Yi Zhang, Peng Lu, Zheng Kun Zhai, and Ming Yi Zhu. "The Research of Center Shaft Bracket Stamping Simulation Technology Based on Dynaform." Advanced Materials Research 779-780 (September 2013): 130–35. http://dx.doi.org/10.4028/www.scientific.net/amr.779-780.130.

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Aiming at the center shaft bracket sheet extension parts, its stamping calculation is simulated based on the sheet metal forming with nonlinear finite element software Dynaform. The contours varying with blank holder forces, friction coefficients and material performance parameters (sheet hardening exponent n and thick anisotropic coefficient r) are obtained by using the simulation software. The impact of the factors on the central shaft bracket parts stamping is analysised by using the contours, provide the theory to eliminate the fold and fracture in the stamping process.

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Yatsun, E. I., O. S. Zubkova, D. A. Zubkov, and B. Namusokwe. "Parameters of the extraction of a thin-walled glass made of corrosion-resistant steel 12X18N10T." E3S Web of Conferences 460 (2023): 09004. http://dx.doi.org/10.1051/e3sconf/202346009004.

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Methods of metal processing by pressure are one of the most advanced technological methods of manufacturing thin-walled spatial parts. The volumetric stamping methods used ensure high productivity while maintaining product quality. Cold volumetric stamping is one of the main types of metal forming in many branches of mechanical engineering, as it most fully meets the requirements of approximating the shapes and sizes of workpieces to finished parts. Determining the rational technology of the stamping process is a fundamental factor in the development of the production of a new product. Hollow parts with a bottom of the "glass" type are usually obtained by direct or reverse extrusion. The maximum deformation and minimum wall thickness of the part in this case is determined depending on the technological deformability of the workpiece. The design of technological processes of cold volumetric stamping of thin-walled parts of the "glass" type involves solving a number of complex tasks: determination of the stress-strain state; determination of punching forces, loads, etc. The use of traditional methods of designing technological processes of cold volumetric stamping does not always allow us to solve these tasks and ensure the optimal combination of the required quality of the finished part and the minimum time and cost of production. One of the effective approaches to solving these problems is the use of computer-aided design systems based on computer technologies: CAD and SAE systems - software complexes for automated engineering analysis of volumetric stamping processes.

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Journal articles on the topic 'Metal stamping'

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