Transactions of Materials and Heat Treatment

Title：Process analysis and parameter optimization for fine blanking of thin-wall hexagon flange nut

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year,vol(issue):pagenumber：2020,45(10):106-111

Abstract：

For the structural characteristics of thin-walled hexagon flange nut, two kinds of fine blanking process schemes were proposed, and according to the characteristics of fine blanking process, the mechanical model of fine blanking was established. Then, the finite element model was established based on DEFORM-3D, and the fine blanking processes of two schemes were numerical simulated respectively. Furthermore, the results of workpiece damage value and forming load for two kinds of fine blanking process schemes were analyzed and compared, and a better process scheme was obtained. Then, combined with orthogonal experiment, surface hardness of mold,

friction coefficient, stamping speed and clearance between punch and die were selected as the experimental factors, and the orthogonal experiment with four factors and there levels was established. Finally, the influences of each experimental factor on the wear amount of mold were studied, and taking the minimum wear amount of mold in the fine blanking process as the optimization objective, the optimal process parameter combination of optimal scheme was found. The results show that when the surface hardness of mold is 55 HRC, the friction coefficient is 0.1, the stamping speed is 10 mm·s-1, and the clearance between punch and die is 0.04 mm, the wear amount of mold is the least. Through the process experiment, the credibility of optimal scheme for process parameter combination is verified to effectively guide the design of process and mold .

Funds：

大连职业技术学院（大连广播电视大学）2020年度科研课题成果(DZDD2020B-22)

朱宇（1976-），女，工学硕士，副教授 E-mail：zy-dlvtc@163.com

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