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Relevant bibliographies by topics / BLANK HOLDING FORCE

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Journal articles

Academic literature on the topic 'BLANK HOLDING FORCE'

Author: Grafiati

Published: 11 September 2023

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Journal articles on the topic "BLANK HOLDING FORCE"

1

Thiruvarudchelvan, S., and W. G. Lewis. "Deep Drawing With Blank Holder Force Approximately Proportional to the Punch Force." Journal of Engineering for Industry 112, no. 3 (1990): 278–85. http://dx.doi.org/10.1115/1.2899587.

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A new method of applying blank holding force approximately proportional to the punch force in cup drawing is presented. An annular urethane pad compressed between two parts of a punch expands and applies pressure against the tubular part of a blank holder. As the punch moves to draw the blank, friction between the urethane pad and the blank holder applies automatically a blank holding force approximately proportional to the punch force. Experimental investigations were carried out with aluminum blanks to determine the optimum conditions to obtain wrinkle-free cups. Variations of the punch forc

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2

Shan, Ti Kun, and Li Liu. "Springback of TRIP Steels under Varying Blank Holder Force." Key Engineering Materials 561 (July 2013): 620–25. http://dx.doi.org/10.4028/www.scientific.net/kem.561.620.

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The method using variable blank holding force to control springback in drawing of TRIP sheet steel is discussed. Numerical simulations considering the variation of Youngs modulus of TRIP steels can improve springback simulation accuracy. Many experiments are use to test and the accuracy of the springback simulation for an U-channel part forming under variable blank holding force. The results shows that the strategy of variable blank holding force is an effective measure for the springback control in TRIP sheet metal forming processes and the dimensional accuracy of sheet metal parts can be inc

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3

Tan, Chin Joo, and Afshin Aslian. "FE simulation study of deep drawing process of SUS304 cups having no delayed cracks under enhanced blank holding force." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 234, no. 1-2 (2019): 84–94. http://dx.doi.org/10.1177/0954405419855230.

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In the experiment, delayed cracks in deep drawing processes of metastable stainless steel SUS304 cylindrical cups were prevented using elevated blank holding force aided by nanolubrication. Besides tensile residual hoop stresses, the elimination of the cracks was also attributed to the change in wall thickening profile along the wavy cup edges. The wall thickening is a result of the high circumferential stress acting in the flange, leading to the high concentration of deformation-induced martensite and high risk of cracks. The amount of increase in wall thickness in the valleys along the edge

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4

He, Sijun, Xin Wu, and S. Jack Hu. "Formability Enhancement for Tailor-Welded Blanks Using Blank Holding Force Control." Journal of Manufacturing Science and Engineering 125, no. 3 (2003): 461–67. http://dx.doi.org/10.1115/1.1580853.

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Tailor-welded blanks (TWB) are widely used for stamped auto body panels because of their great benefits in weight and cost reduction. However, the weld line in a tailor-welded blank causes serious concerns in formability because of material discontinuity and additional inhomogeneous stress/strain distribution. This paper proposes a blank holding force (BHF) control strategy to control the weld line movement, distribute the deformation more uniformly and thereby improve TWB formability. The control methodology is developed based on a simplified 2-D sectional analytical model that estimates the

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5

Qian, Jian Qing, Ji Ping Chen, and Hai Fan Qian. "The Influence of N Values on Sheet Metal Deep Drawing Based on Different Blank Holder Forces." Advanced Materials Research 418-420 (December 2011): 1364–67. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1364.

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The influence of hardening index n value at different holding forces on LDR of cylinder cup was simulated by the finite element software PAM-STAMP 2G. The results showed that the limit drawing ratio of the sheet metal decreased with the increase of the blank holder force. There was little influence of hardening index n value on the limit drawing ratio at smaller blank holder force. The influence of hardening index n value on the limit drawing ratio increased with the increase of the blank holder force. The hardening index n value could be increased to increase the limit drawing ratio when the

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6

Ke, Jun Yi, Yu Qi Liu, Gui Li, and Ting Du. "Springback Experimental Research of Advanced High-Strength Steel." Advanced Materials Research 842 (November 2013): 284–88. http://dx.doi.org/10.4028/www.scientific.net/amr.842.284.

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Springback is one of the major problems of high strength steel.Based on the NUMISHEET’96 S_Rail standard examination questions,using the characteristics of the servo press 200T,the blank holder force,different pressure holding time and the holding times of advanced high strength steel DP280-440, DP340-590, DP400-780 are studied. By changing one of the three impact factors ,three group experiments are carried out.The experimental results show that the springback can change evidently with the increasing of the blank holder force and the holding times,but the holding time has little influence on

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7

Yoon, Hyung Sop, Sergei Alexandrov, Kwan Soo Chung, Robert E. Dick, and T. J. Kang. "Prediction of Critical Blank-Holding Force Criterion to Prevent Wrinkles in Axi-Symmetric Cup Drawing." Materials Science Forum 505-507 (January 2006): 1273–78. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1273.

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The repression of wrinkling during sheet metal forming has been a significant issue in recent years. In order to provide a reliable and efficient tool to predict the critical blank holding force to prevent wrinkles, an axi-symmetric analytical model for flange wrinkling is introduced here. Using a conventional theory of the critical condition, the critical blank-holding force and wave numbers are numerically predicted. Comparison between the numerical and experimental results shows excellent agreement for various blank dimensions and materials.

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8

Venkateshwar Reddy, P., S. Hari Prasad, Perumalla Janaki Ramulu, Sirish Battacharya, and Daya Sindhu Guptha. "Effect of Geometries of Die/Blank Holder and Punch Radii in Angular Deep-Drawing Dies on DP Steel Formability." Applied Mechanics and Materials 813-814 (November 2015): 269–73. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.269.

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In recent days deep-drawing is one of the most important methods used for sheet metal forming. The geometries of die/blank holder and punch are one of the parameters for deep-drawing. This paper presents an attempt to determine the effect of different geometries of die/blank holder, punch radii and blank holding force on deep drawing process for the formability of DP Steel of 1mm sheet. The numerical simulations are performed for deep drawing of cylindrical cups at a constant frictional coefficient of 0.12 and different blank holding forces of 10, 15 and 20kN are used. For numerical simulation

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9

Seo, Hyung Yoon, Chul Kyu Jin, and Chung Gil Kang. "Effect on Blank Holding Force on Blank Deformation at Direct and Indirect Hot Deep Drawings of Boron Steel Sheets." Metals 8, no. 8 (2018): 574. http://dx.doi.org/10.3390/met8080574.

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This study involves performing direct and indirect hot press forming on ultra-high-strength steel (UHSS) boron steel sheets to determine formability. The indirect hot press process is performed as a cold deep drawing process, while the direct hot press process is performed as a hot deep drawing process. The initial blank temperature and the blank holding force are set as parameters to evaluate the performance of the direct and indirect deep drawing processes. The values of punch load and forming depth curve were obtained in the experiment. In addition, the hardness and microstructure of the bo

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10

Wang, Guang Kai, Si Yuan Cheng, Su Yang Li, and Xiang Wei Zhang. "Application of Numerical Simulation in Stamping Process of Complex Box-Type Parts." Advanced Materials Research 291-294 (July 2011): 579–84. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.579.

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Due to the recent development both in the numerical simulation technology and computer technology, the role of numerical simulation in sheet forming industry has been continuously increasing in recent years. This paper describes the application of numerical simulation technology in the forming process of a complex box-type part with Dynaform and gives a fairly accurate forecast of defects that may appear in the forming process. Prediction of the effect of design parameters such as blank holding force and drawbeads on forming quality is investigated. The study indicates that blank holding force

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