铝合金板温成形过程中拉深筋处摩擦的测量  

Tribotest at drawbead in aluminum alloy sheet warm forming

作　　者：张伟[1] 李志刚[1] 郭正华[2] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]南昌航空工业学院材料科学与工程学院,江西南昌330034

出　　处：《锻压技术》2007年第4期98-101,共4页Forging & Stamping Technology

基　　金：美国通用汽车公司资助研究项目

摘　　要：在温成形过程中铝合金板与模具表面的接触和摩擦行为十分复杂,不同的接触区域摩擦状况不尽相同。分析了板料成形中摩擦测量的国内外发展状况,采用自行设计的新型摩擦测量装置完成了铝合金板温成形过程中拉深筋处摩擦系数的测量。该测量装置的特点是可以模拟板料的真实变形过程,采用楔形铝合金板试件,通过楔形槽产生周向挤压,来模拟法兰区板料成形时的增厚趋势,添加了加温和温控装置来模拟温成形时的温度环境,从而获得更为准确的测量结果。The contact and friction behavior between aluminum alloy sheet and die surface in warm forming is very complicated. Friction status varies in different contact areas. The researches on tribotest for sheet metal forming were introduce＆ A new friction coefficient measurement device was developed to measure the friction coefficient at drawbead in aluminum alloy sheet warm forming. The feature of the measuring device was that the real forming process of the sheet metal could be modeled during the measurement. The aluminum alloy sheet sample with wedge--shaped edge was adopted to get the circumferential compressive stress exerted by the cuneal groove. A number of heating rods and the temperature control were adopted to simulate the temperature of warm forming. Therefore, more accurate results could be obtained.

关 键 词：铝合金板 温成形 拉深筋 摩擦测量 

分 类 号：TG386.32[金属学及工艺—金属压力加工]