Relevant bibliographies by topics / Drawbead simulator

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Academic literature on the topic 'Drawbead simulator'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Drawbead simulator"

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Trzepiecinski, Tomasz, and Romuald Fejkiel. "A 3D FEM-Based Numerical Analysis of the Sheet Metal Strip Flowing Through Drawbead Simulator." Metals 10, no. 1 (December 25, 2019): 45. http://dx.doi.org/10.3390/met10010045.

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Drawbeads are elements of the stamping die and they are used to compensate material flow resistance around the perimeter of the drawpiece or to change the stress state in specific regions of the drawpiece. This paper presents the results of experimental and numerical analyses of tests of sheet metal flowing through a drawbead. The tests have been carried out using a special tribological simulator of the drawbead. Experimental tests to determine the coefficient of friction (COF) have been carried out for three widths of sheet metal strip and two drawbead heights. The three-dimensional (3D) elastic-plastic numerical computations were performed using the MSC. Marc program. Special attention was given to the effect of material flow through the drawbead on the distribution of the normal stress on the tool-sheet interface. The mesh sensitivity analysis based on the value of the drawing force of the specimen being pulled through the drawbead allowed an optimal mesh size to be determined. The errors between the numerically predicted values of the COF and the values experimentally determined ranged from about 0.95% to 7.1% in the cases analysed. In the case of a drawbead height of 12 mm, the numerical model overestimated the value of the COF for all specimen widths analysed. By contrast, in the case of a drawbead height of 18 mm, all experimentally determined friction coefficients are underestimated by Finite Element Method (FEM). This was explained by the different character of sheet deformation under friction and frictionless conditions. An increase in the drawbead height, with the same sheet width, increases the value of the COF.
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Trzepieciński, Tomasz. "Numerical modeling of the drawbead simulator test." Scientific Letters of Rzeszow University of Technology - Mechanics 84, no. 3/2012 (2012): 69–78. http://dx.doi.org/10.7862/rm.2012.6.

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Trzepiecinski, Kubit, Slota, and Fejkiel. "An Experimental Study of the Frictional Properties of Steel Sheets Using the Drawbead Simulator Test." Materials 12, no. 24 (December 4, 2019): 4037. http://dx.doi.org/10.3390/ma12244037.

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This article presents the results of an experimental investigation of the frictional resistance arising in a drawbead during sheet metal forming. The frictional characterization of DC04 deep drawing quality steels commonly used in the automotive industry is carried out using a friction simulator. The effects of some parameters of the friction process on the value of the coefficient of friction have been considered in the experimental investigations. The friction tests have been conducted on different strip specimens, lubrication conditions, heights of drawbead and specimen orientations in relation to the sheet rolling direction. The results of drawbead simulator tests demonstrate the relationship that the value of the coefficient of friction of the test sheets without lubrication is higher than in the case of lubricated sheets. The lubricant reduces the coefficient of friction, but the effectiveness of its reduction depends on the drawbead height and lubrication conditions. Moreover, the effectiveness of the reduction of the coefficient of friction by the lubricant depends on the specimen orientation according to the sheet rolling direction. In the drawbead test, the specimens oriented along the rolling direction demonstrate a higher value of coefficient of friction when compared to the samples cut transverse to the rolling direction. The smaller the width of the specimen, the lower the coefficient of friction observed. The difference in the coefficient of friction for the extreme values of the widths of the specimens was about 0.03–0.05. The use of machine oil reduced the coefficient of friction by 0.02–0.03 over the whole range of drawbead heights. Heavy duty lubricant even reduced the frictional resistances by over 50% compared to dry friction conditions. The effectiveness of friction reduction by machine oil does not exceed 30%.
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Weinmann, K. J., J. R. Michler, V. D. Rao, and A. R. Kashani. "Development of a Computer-Controlled Drawbead Simulator for Sheet Metal Forming." CIRP Annals 43, no. 1 (1994): 257–61. http://dx.doi.org/10.1016/s0007-8506(07)62208-2.

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Reid, Jean V., and Rajeev G. Kamat. "Evaluating the performance of can-body stock using the drawbead simulator." JOM 48, no. 6 (June 1996): 26–28. http://dx.doi.org/10.1007/bf03222961.

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Michler, J. R., K. J. Weinmann, A. R. Kashani, and S. A. Majlessi. "A strip-drawing simulator with computer-controlled drawbead penetration and blankholder pressure." Journal of Materials Processing Technology 43, no. 2-4 (June 1994): 177–94. http://dx.doi.org/10.1016/0924-0136(94)90020-5.

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Trzepieciński, Tomasz, and Hirpa G. Lemu. "Frictional Conditions of AA5251 Aluminium Alloy Sheets Using Drawbead Simulator Tests and Numerical Methods." Strojniški vestnik – Journal of Mechanical Engineering 60, no. 1 (January 15, 2014): 51–60. http://dx.doi.org/10.5545/sv-jme.2013.1310.

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Li, Siu Ping, Alper Güner, and A. Erman Tekkaya. "Analysis of Drawbead Behaviour for Sandwich Sheets in Sheet Forming Simulation." Applied Mechanics and Materials 794 (October 2015): 59–66. http://dx.doi.org/10.4028/www.scientific.net/amm.794.59.

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Lightweight sandwich sheets represent an alternative in the framework of body lightweight construction. They are made of metal face sheets which form a shear-resistant bond with the thermoplastic core layer. The present work describes the drawbead behavior of sandwich sheets and how it can be modelled in a numerical simulation. Drawbeads are used to control the rate of material flow into the die cavity and are located in the binder area. In the numerical simulation they are either modelled as physical drawbeads or replaced by an equivalent drawbead in which a certain drawbead restraining force (DBRF) is specified as a boundary condition. The values of DBRF can be obtained in a strip test, via numerical simulation or predicted with the aid of a drawbead model. In the current study, strip tensile tests through different physical drawbeads are conducted for sandwich materials. With the obtained variables, restraining forces and thinning values, the results from numerical simulations can be evaluated. Once an optimal simulation approach is found, a parameter study can be conducted to analyze the main influencing factors on drawbead behavior. The results from this study can be leveraged to create a semi-empirical drawbead model.
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Qiu, Xiao Gang, and Hao Huang. "Comparing Study on Real Drawbead and Equivalent Drawbead Based on Finite Element Analysis." Advanced Materials Research 430-432 (January 2012): 1056–59. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1056.

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The dynamic explicit finite element software DYNAFORM was used to simulate the real and equivalent drawbead model. Analyzed the influence of the blank hold force (BHF) and virtual velocity on blank’s deformation behavior after passing through drawbead, compared the results of the FE simulation. The simulation results were confirmed by experiments. The study shows that the equivalent drawbead model can’t simulate the blank’s behavior precisely when it passing the real drawbeads, the effect of BHF on real drawbead model is larger than equal drawbead model; the proper range of virtual velocity was obtained at the same time.
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Sena, Khemajit, and Surasith Piyasin. "Position and the Size of Drawbeads for Sheet Metal Forming with the Finite Element Method." Applied Mechanics and Materials 607 (July 2014): 112–17. http://dx.doi.org/10.4028/www.scientific.net/amm.607.112.

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This study aims to find a solution to improve the formability in a deep drawing process. For this purpose drawbeads were used to avoid wrinkles and ruptures. The finite element method was applied to simulate the 3D metal forming process using a die and drawbead. The drawbead amount, position, size and form were studied for their affects on the formability. 3 drawbead patterns with 3 different heights were examined. The simulation was performed for each drawbead pattern and each drawbead geometrical parameter and the failure elements were counted. The best pattern chosen was the pattern that resulted in the least failure elements.
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Dissertations / Theses on the topic "Drawbead simulator"

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Lanzon, Joseph, and kimg@deakin edu au. "EVALUATING LUBRICANTS IN SHEET METAL FORMING." Deakin University. Department of Science and Engineering, 1999. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20040428.095238.

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The sheet metal forming process basically involves the shaping of sheet metal of various thickness and material properties into the desired contours. This metal forming process has been extensively used by the automotive industry to manufacture both car panels and parts. Over the years numerous investigations have been conducted on various aspects of the manufacturing process with varied success. In recent years the requirements on the sheet metal forming industry have headed towards improved stability in the forming process while lowering environmental burdens. Therefore the overall aim of this research was to identify a technique for developing lubricant formulations that are insensitive to the sheet metal forming process. Due to the expense of running experiments on production presses and to improve time efficiency of the process the evaluation procedure was required to be performed in a laboratory. Preliminary investigations in the friction/lubricant system identified several laboratory tests capable of measuring lubricant performance and their interaction with process variables. However, little was found on the correlation between laboratory tests and production performance of lubricants. Therefore the focus of the research switched to identifying links between the performance of lubricants in a production environment and laboratory tests. To reduce the influence of external parameters all significant process variables were identified and included in the correlation study to ensure that lubricant formulations could be desensitised to all significant variables. The significant process variables were found to be sensitive to die position, for instance: contact pressure, blank coating of the strips and surface roughness of the dies were found significant for the flat areas of the die while no variables affected friction when polished drawbeads were used. The next phase was to identify the interaction between the significant variables and the main lubricant ingredient groups. Only the fatty material ingredient group (responsible for the formation of boundary lubricant regimes) was found to significantly influence friction with no interaction between the ingredient groups. The influence of varying this ingredient group was then investigated in a production part and compared to laboratory results. The correlation between production performance and laboratory tests was found to be test dependant. With both the Flat Face Friction test and the Drawbead Simulator unaffected by changes in the lubricant formulation, while the Flat Bottom Cup test showing similar results as the production trial. It is believed that the lack of correlation between the friction tests and the production performance of the lubricant is due to the absence of bulk plastic deformation of the strip. For this reason the Ohio State University (OSU) friction test was incorporated in the lubricant evaluation procedure along with a Flat Bottom Cup test. Finally, it is strongly believed that if the lubricant evaluation procedure highlighted in this research is followed then lubricant formulations can be developed confidently in the laboratory.
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Jing-hong, Chen, and 陳靖紘. "The Computer Simulation of Drawbead Lubrication in Sheet Metal Forming." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/24153539715374282769.

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碩士
元智大學
機械工程學系
90
In the sheet metal forming process, the drawbead test is mainly designed to test the friction stress between the sheet metal forming and the drawbead. How ever, in the past most of the friction theories used the simple fixed friction coefficient model, or used the method of no friction stress, so as to neglect the importance of the affection of complex factor in the real friction. With an aim to setting up a set of complete real friction model in drawbead test, we developed an analytical model that combines finite element code with four kinds of different lubrication regimes in the complete friction theory. Based on the computer software’s simulated analyses, the friction coefficient that had been attained by the imitation needs to be investigated and compared with the related essay records. Through this outcome of comparison, we hope to provide the friction theory and imitate the result of the sheet metal forming in the real friction situation.
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Conference papers on the topic "Drawbead simulator"

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Ren, F., and Z. C. Xia. "An Investigation of Drawbead Models for Springback Prediction." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21016.

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Accurate prediction of springback for rail-type structures remains a significant challenge for automotive stamping. A major characteristic of forming such parts is that metals go through drawbeads and die-entry radii and often end up within part geometry (i.e., inside trimline). The bending-unbending stresses generated by drawbeads contribute significantly to the eventual springback. In production springback simulation, line drawbead models are generally used to represent the restraining forces provided by the real drawbeads for computational efficiency. While such models can be well correlated to match overall deformation of the part, the bending stresses could not be accurately captured. In the present study, a model of an aluminum U-channel is used to evaluate springback predictability of line drawbead model, which is then compared against simulations that employ detailed drawbead geometry. The results show that the line drawbead model largely under-predicts the springback and the bending moment. The accuracy of the prediction cannot be improved through different binder simulation strategies such as displacement-control or force-control. The study suggests that either real drawbeads be modeled, or the bending stress be incorporated into the line model to improve springback prediction.
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Schey, John A., and S. W. A. Watts. "Transient Tribological Phenomena in Drawbead Simulation." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1992. http://dx.doi.org/10.4271/920634.

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Garci´a Zugasti, Pedro de Jesu´s, Hugo Iva´n Medelli´n Castillo, and Dirk Frederik de Lange. "A Case Study of Drawbead Design of a Deep Drawn Rectangular Part Using FEM." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11250.

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The deep drawing manufacturing process of sheet metal parts with complex shape has increased recently in applications such as in the automotive industry and the household appliances. The trial and error methods commonly used in defining the process parameters, cause high costs and large development times. The computer assisted analysis and simulations are being used more frequently to reduce the cost and development time of a product. The process parameters can be modified and evaluated using these computer simulations before the production is carried out. Therefore the defects of a part can be identified and eliminated, if possible, without the need of the traditional trial and error methods. This paper presents a case study of an industrial component that presented defects (wrinkles at the corners) in its deep drawing process. To eliminate these defects a drawbead was proposed and its optimal location was established using an optimization procedure based on finite element method (FEM). The FEM simulations were validated by measuring the thickness of the fabricated part. To evaluate the elimination of the wrinkle, the thickness of the sheet metal at the critical area was measured in the FEM simulation and compared with the thickness profile before and after the addition of the drawbeads. The results have shown that the design strategy based on FEM can be effectively used as a design tool to eliminate part defects in rectangular deep drawing process.
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Alves, J. L. "Drawbeads: to Be or Not to Be." In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011297.

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Green, Daniel E. "Description of Numisheet 2005 Benchmark #3 Stage-1: Channel Draw with 75% drawbead penetration." In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011335.

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Chen, Lianfeng, Tianran Zheng, Qing Chen, and Jun Zhang. "Investigation on frictional characteristics and drawbead restraining force of steel with/without coating." In NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: Part A Benchmark Problems and Results and Part B General Papers. AIP, 2013. http://dx.doi.org/10.1063/1.4850120.

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Chen, Wei, Gapyong Kim, and Jiahua Zhang. "Springback Prediction and Control in Multi-Stage Sheet Metal Forming." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21018.

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Several forming operations are required to form a complex part, which is known as the multi-stage forming process. Inherently, the final geometry of the stamped part is affected by springbacks from every forming operation. First, the theory on springback after unloading in bending and the technologies of numerical simulation are investigated. The latter includes the numerical solution procedure of springback in multi-stage forming, the time steps of numerical calculation, and the transmission of blank information from the previous stage to the next. Then a sample automotive structural piece, the upper inner panel, has been simulated and validated. Entire forming procedure is simulated with an explicit-implicit coupled FEA program, which is based on the simulation of “loading-unloading of springback-reloading”. Finally, by means of forming process modification, effects of various diefaces including the drawbeads and stiffening beads are investigated to enhance the final part shape. The validation of simulation procedure and the forming process modification method are presented through the comparison of the simulation results with experimental results.
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Ding, Y., and T. J. Nye. "Collaborative Agent Based Optimization of Draw Die Design." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67839.

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In this paper we consider the problem of automatically determining optimal drawbead sizes and blankholder forces when designing draw dies for stamped parts. A network of software agents, each implementing a different numerical optimization technique, was used in combination with metal forming simulation software to optimize process variables. Three test cases were used of varying complexity from a rectangular cup to the NUMISHEET’99 automobile front door panel simulation benchmark. It was found that the performance of each agent (and optimization technique) depended strongly on the complexity of the problem. More interestingly, for a given amount of computational effort, a network of collaborating agents using different optimization techniques always outperformed agents using a single technique in terms of both the best solution found and in the variance of the collection of best solutions.
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Torsakul, S., and A. N. Brezing. "A finite element simulation for shape influences of the drawbead on the non-symmetrical deep drawing process." In 2016 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM). IEEE, 2016. http://dx.doi.org/10.1109/ieem.2016.7798027.

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Aϊta, S., F. El Khaldi, L. Fontaine, T. Tamada, and E. Tamura. "Numerical Simulation of a Stretch Drawn Autobody: Part II - Validation Versus Experiments for Various Holding and Drawbead Conditions." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1992. http://dx.doi.org/10.4271/920640.

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