大型挤压辊两次镦拔新工艺的数值模拟Ⅱ  

The numerical simulation Ⅱ of two times upsetting and stretching for squeeze roller

作　　者：苏娟华[1] 刘晓斐[1] 史宇麟 

机构地区：[1]河南科技大学材料学院,洛阳471003 [2]中信重型机械公司,洛阳471039

出　　处：《机械设计与制造》2008年第5期130-132,共3页Machinery Design & Manufacture

基　　金：河南科技大学博士科研启动基金资助

摘　　要：缺陷检验表明,夹杂是大型挤压辊锻件报废的重要原因之一。而两次镦拔新工艺的第二次镦拔工序是以控制夹杂物状态、提高超声波探伤能力为目的的新工艺。利用商业软件Deform,对两次镦拔新工艺的第二次镦粗+WHF法拔长与镦粗+FM法拔长锻造RP170-110挤压辊的过程分别进行了数值模拟研究。结果表明,镦粗后采用两种方法拔长均能够出现三向压应力,在成形锻件的同时,有效控制夹杂物状态,且效果相当。8件试制锻件全部合格的结果说明了数值模拟的正确性和两次镦拔新工艺第二次镦拔工序的合理性。Examination results show that inner impuritiy is an important factor resulting in disqua lification of large forgings. The second of the two times upsetting and streching is a new method for larging forgings ,aiming at controlling the state of impurities and uprate the capability of supersonic inspection. The WHF-stretching and FM-stretching after second upsetting of two times upsetting and stretching are simulated using commercial software Deform ,The result indicates that both of WHF-streching and FM- streching can control inner impurities, as well as form workpiece , the effect of two ways is the same. That 8 trial-manufactured products are all up to grade proves the rationalization of the technics.

关 键 词：镦粗 拔长 夹杂 数值模拟 

分 类 号：TH16[机械工程—机械制造及自动化] TG312[金属学及工艺—金属压力加工]