Transactions of Materials and Heat Treatment

Title：Application of hydraulic compound forming technology for tee part

Authors： Feng Sule Xu Yongchao Zhao Tao Guan Yajuan Xu Aijie

Unit： Shanghai Aerospace Research Institute of Precision Machinery Harbin Institute of Technology

KeyWords： hydraulic compound forming tee part hydraulic pressure hydromechanical deep drawing internal high pressure bulging

ClassificationCode：TG394

year,vol(issue):pagenumber：2018,43(1):72-77

Abstract：

The technology improvement of tee part produced by CNC milling was conducted by hydraulic compound forming technology. Then, the mechanical models of hydromechanical deep drawing and internal high pressure bulging were established, and the influences of friction coefficient, drawing ratio, blank holder force and bulging force, etc. on the forming of part were analyzed. When the hydraulic pressure increased to 40 MPa, the thinning rate of wall thickness after hydromechanical deep drawing was the minimum of 27.5% at the punch corner by the numerical simulation of hydraulic pressure. Furthermore, the tee part with a inner diameter of SR90 mm was formed by hydraulic compound forming technology, and the minimum wall thickness in the flange of forming tee part was 1.59 mm. Thus, the integral forming of spherical tee part of stainless steel 1Cr18Ni9Ti was realized by assessing the reliability of hydraulic strength and air tightness. The results show that the hydraulic compound forming technology reduces the production cycle of tee part for eight days, and the material utilization is improved up to 60%.

Funds：

上海航天局型号工艺攻关项目（716A-YZ）

作者简介：冯苏乐（1987-），男，硕士，工程师，E-mail：fengsuleshikeke@sina.com

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