Transactions of Materials and Heat Treatment

Title：Optimization design of punch structure for round steel pipe without die in piercing

Authors： Zhu Chao Qin Caiyou

Unit： Sichuan Engineering Technical College

KeyWords： steel pipe non-die piercing spiral punch orthogonal experimental design finite element simulation

ClassificationCode：TG385.2

year,vol(issue):pagenumber：2015,40(3):74-77

Abstract：

For the deformation defects of scallops and large scale of collapses produced in the traditional flat and sharp punch during non-die piercing process, a new spiral punch structure was presented. The influences of upper blade angle β and lower blade angle α of spiral punch on punching force and punching quality were studied by finite element simulation analysis. Moreover, the relationship between upper blade angle β and lower blade angle α of spiral punch was researched based on orthogonal experimental design. Finally，the optimal parameters of punch structure were obtained，namely the upper blade angle is 45° and the lower blade angle is 40°. The die structure was designed by the optimized punch structure parameters, and the stamping tests were carried out by tilting open press. With only a little concave and burr, the piercing quality met production requirements. The test result is consistent with the simulation result.

Funds：

朱超（1969-），男，硕士，副教授

Reference：

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