Semi-analytical models for flexure deformation in one-step simulation of sheet metal forming

2017 ◽  
Vol 12 (2) ◽  
pp. 197-210
Author(s):  
Edmondo Di Pasquale
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Analytical Models ◽  
One Step

Simulation of sheet metal forming by a one-step approach: choice of element

2001 ◽  
Vol 108 (3) ◽  
pp. 300-306 ◽  
Author(s):  
Xiaoxiang Shi ◽  
Yuanping Wei ◽  
Xueyu Ruan
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
One Step

A Hybrid Draw Die Optimization Technique for Sheet Metal Forming

2004 ◽  
Vol 126 (3) ◽  
pp. 582-590 ◽  
Author(s):  
Adrian Scott-Murphy ◽  
S. Kalyanasundaram ◽  
M. Cardew-Hall ◽  
Peter Hodgson
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Optimization Technique ◽  
Die Design ◽  
Analytical Models ◽  
Limiting Factor ◽  
Knowledge Based ◽  
Time Required

Recent years have seen considerable advances in the use of Finite Element (FE) modeling techniques, to the point where they can be used confidently to predict the output of the sheet metal forming system. The limiting factor in the use of FE analysis in the optimization process is now shifting from the accuracy of simulations, to the time required to optimize the system. This paper proposes a new approach aimed at reducing the time to optimize a draw die design, through a combination of Finite Element Modeling, semi-analytical models, and a knowledge based expert system.

Research on applying one-step simulation to blank design in sheet metal forming

2002 ◽  
Vol 120 (1-3) ◽  
pp. 111-114 ◽  
Author(s):  
Ye Wang ◽  
Qiyu Shen ◽  
Yuguo Wang ◽  
Yongqing Zhang
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Blank Design ◽  
One Step

One-step inverse isogeometric analysis for the simulation of sheet metal forming

2019 ◽  
Vol 349 ◽  
pp. 458-476 ◽  
Author(s):  
Changsheng Wang ◽  
Xiangkui Zhang ◽  
Guozhe Shen ◽  
Yang Wang
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Isogeometric Analysis ◽  
One Step

The Blank Optimization of an Automotive Fender Skirt in the Process of Sheet Metal-Forming Based on one-Step Simulation Method

2013 ◽  
Vol 634-638 ◽  
pp. 2904-2908
Author(s):  
Yu Ping Zhang ◽  
Jie Wei Hong
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Simulation Method ◽  
Forming Simulation ◽  
One Step ◽  
Blank Shape ◽  
Mould Design ◽  
3D Software ◽  
Simulated Analysis

This article puts forward One-step forming simulation method to solve blank outline problems in the process of sheet metal forming. The blank outline curve is got from the simulated analysis of Groupware of Fender by one-step simulation in Dynaform 3D software for sheet forming, considering the final shape of the workpiece. It simulates three programs via three different shapes of blanks. And it compares and analyze the FLD diagram and forming results ,and then it gets the optimized blank shape. This way guides the mould design, and save the time of repairing moulds on the basis of producing qualified products. It overcomes the puzzle how to choose the blanks’ size and shape.

Optimum design of middle stage tool geometry and addendum surfaces in sheet metal stamping processes using a new isogeometric-based framework

2021 ◽  
pp. 095440542110410
Author(s):  
Mansoor Shamloofard ◽  
Amir Reza Isazadeh ◽  
Mehdi Bostan Shirin ◽  
Ahmad Assempour
Keyword(s):  
Sheet Metal ◽  
Optimum Design ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Computation Time ◽  
Objective Functions ◽  
Acceptable Accuracy ◽  
Design Variables ◽  
One Step

An efficient isogeometric-based framework is presented to integrate optimum design and formability analysis of sheet metal forming processes. To assess the quality of the formed parts, several objective functions such as fracture, wrinkling, thickness variation, and stretching are studied. In this framework, geometric parameters of addendum surfaces and middle tools are considered as design variables, the objective functions are calculated using the recently developed one-step and multi-step inverse isogeometric methods, and the optimum design variables are obtained using the genetic global optimization algorithm. The major advantage of employing the inverse methods is to analyze the formability of the parts with a low computation time. In this research, the effects of altering addendum surfaces and/or middle tools on the quality of the formed parts are simultaneously observed since modeling, formability analysis, and optimization stages of sheet metal forming simulation are integrated using the NURBS functions. To evaluate the performance of the inverse isogeometric models in calculation of the studied objective functions, the results obtained by these models are compared to those of experiment and forward FEM. Comparisons of the results indicate that these models predict the objective functions with acceptable accuracy at a low computation time. For instance, in sheet metal forming analysis of a rectangular box with three different addendum surfaces, the maximum error in prediction of minimum thickness using the one-step inverse model is approximately 4.65% more than forward FEM, while the solution time of forward FEM is around 40 times greater. Finally, the presented optimization procedure is applied to design addendum surfaces in forming of a rectangular box and the middle tools in a two-stage drawing of a square box. The results of these problems confirm the credibility of the present approach in rapid optimum design of addendum surfaces and intermediate tools with acceptable accuracy.

ИССЛЕДОВАНИЕ ТОЧНОСТИ ДЕТАЛЕЙ, ПОЛУЧАЕМЫХ ПРИ РАЗДЕЛИТЕЛЬНЫХ ОПЕРАЦИЯХ В ПЕРЕНАЛАЖИВАЕМЫХ ШТАМПАХ

2018 ◽  
pp. 52-63
Author(s):  
Е. А. Фролов ◽  
В. В. Агарков ◽  
С. И. Кравченко ◽  
С. Г. Ясько
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Balance Method ◽  
Experiment Planning ◽  
Practical Recommendations

To determine the accuracy of the readjustable punches for separating operations (perforation + punching out) of sheet-metal forming, the accuracy parameters were analyzed using the random balance method using the method of experiment planning. Analytical dependencies are obtained to determine the values of deviation of the outer and inner contour dimensions of perforated and punched out sheet parts. From the dependencies obtained, it is possible to estimate and predict the value of deviation in the dimensions of the resulting part at any time during the operation of the punch. Practical recommendations on the calculation of the actuating dimensions of the working elements (stamping punch, matrix) of readjustable punches are offered.

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