Estimating surface hardening profile of blank for obtaining high drawing ratio in deep drawing process using FE analysis

4th Global Conference on Materials Science and Engineering

Tan, C.J.^1,2 ; Aslian, A.^1,2 ; Honarvar, B.^3 ; Puborlaksono, J.^1,2 ; Yau, Y.H.^1 ; Chong, W.T.^1

Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, Kuala Lumpur

50603, Malaysia^1

Centre of Advanced Manufacturing and Material Processing (AMMP Centre), University of Malaya, Lembah Pantai, Kuala Lumpur

50603, Malaysia^2

Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, Kuala Lumpur

50603, Malaysia^3

关键词: Axisymmetric modeling;    Cylindrical cups;    Deep-drawing process;    Drawing ratios;    Inner diameters;    Limiting drawing ratio;    Outer diameters;    Surface hardening;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/103/1/012047/pdf
DOI  :  10.1088/1757-899X/103/1/012047

来源: IOP

【 摘 要 】

We constructed an FE axisymmetric model to simulate the effect of partially hardened blanks on increasing the limiting drawing ratio (LDR) of cylindrical cups. We partitioned an arc-shaped hard layer into the cross section of a DP590 blank. We assumed the mechanical property of the layer is equivalent to either DP980 or DP780. We verified the accuracy of the model by comparing the calculated LDR for DP590 with the one reported in the literature. The LDR for the partially hardened blank increased from 2.11 to 2.50 with a 1 mm depth of DP980 ring-shaped hard layer on the top surface of the blank. The position of the layer changed with drawing ratios. We proposed equations for estimating the inner and outer diameters of the layer, and tested its accuracy in the simulation. Although the outer diameters fitted in well with the estimated line, the inner diameters are slightly less than the estimated ones.