Investigation into Metal Flow Rule during Extrusion of Spherical Surface Parts

• 作 者: 林俊峰
• 机 构: National Key Laboratory for Precision Heat Processing of Metals,Harbin Institute of Technology,
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2009年S1期
• 关键词: extrusion spherical technological replace drilling enhancing tensile blank manuf

A new process of extrusion forming was used to replace the traditional drilling technics.This kind of forming method may improve the structure of materials and anti-deforming capacity,enhancing the life of parts.It is shown by numerical simulations on the forming process of spherical extrusion on bolt-hole.Effects of technological parameters were discussed on spherical surface of extrusion and the diameter of pre-punching hole was determined.It is revealed that the smaller diameter of pre-punching hole,the larger deforming measurement of hole after extrusion.The extrusion stress determines the development trend of pre-punch hole becomes bigger or smaller and the pre-punching hole diameter is the key to control the size of deforming measurement of hole after extrusion.

A new process of extrusion forming was used to replace the traditional drilling technics. This kind of forming method may improve the structure of materials and anti-deforming capacity, enhancing the life of parts. It is shown by numerical simulations on the forming process of spherical extrusion on bolt-hole. Effects of technological parameters were discussed on spherical surface of extrusion and the diameter of pre-punching hole was determined. It is revealed that the smaller diameter of pre-punching hole, the larger deforming measurement of hole after extrusion. The extrusion stress determines the development trend of pre-punch hole becomes bigger or smaller and the pre-punching hole diameter is the key to control the size of deforming measurement of hole after extrusion.