• 材料工程 •

### 锥形模机械扩径力计算与主要影响因素分析

1. 上海理工大学,上海,200093
• 出版日期:2010-03-10 发布日期:2010-03-22
• 基金资助:
上海市教育委员会重点学科建设项目(J50503)

### Calculation of Tube Mechanical Expanding Force with Conical Die and Analysis of Main Influence Factors

Cai Jinda;Cheng Xi;Fu Xiang;Gan Hanqing

1. University of Shanghai for Science and Technology,Shanghai,200093
• Online:2010-03-10 Published:2010-03-22

Abstract:

Mechanical expanding of tube with conical die was investigated, stress state of unit in deformation zone was analyzed, unit model of deformation zone was established, slab method to solve deforming force on metal plastic forming was adopted, according to Mises yield criterion, considering effects of work hardening and bending stress, analytic formula of the mechanical expanding was derived. Moreover, the formula was amended by taking account of effect of fixing-diameter zone.The amended formula indicate that expanding force is related to die semi-cone angle, friction coefficient between die and tube internal surface, original diameter of tube, tube thickness, expanding coefficient and length of die’s fixing-diameter district. The rationality and correctness of expanding force formula were proved by expanding tests.