Transactions of Materials and Heat Treatment

Title：Optimization on process parameters for improving the quality of small hole punching on thick steel plate

Authors： Zhu Lihong Wei Jie

Unit： Chengdu University of Technology

KeyWords： thick steel plate small hole punching relative bright belt numerical simulation orthogonal experimental design

ClassificationCode：TG386.2

year,vol(issue):pagenumber：2015,40(8):140-143

Abstract：

In order to improve the quality of small hole （t/d≥1,t>4 mm）punching on steel 10 plate, the influences of material thickness t, punching hole diameter d, clearance c between punch and die, and friction coefficient m on blanking quality were studied. Combining numerical simulation and orthogonal experiment design research, it is found that the most important factor influencing the length of relative bright belt is the clearance between punch and die, the second important factors are the material thickness and the small hole diameter, and the weaker one is friction coefficient. The length of relative bright belt increases first and then decreases with the increase of clearance between punch and die, and it increases with the increase of the sheet thickness, but it does not change greatly with the increase of small-hole diameter and friction coefficient. By comprehensive analysis for improving the quality of punching, it is found that the optimized parameters are the thickness to diameter ratio of 1.1-1.5 and clearance of between punch and die (5%-10%)t. Through production testing, the simulation result is consistent with the experimental result, and the forming result of the punch is qualified.

Funds：

四川省教育厅科研资助项目（14ZB0356）;成都理工大学工程技术学院青年科学基金（C122014006）

朱里红（1979-），男，硕士，讲师

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