摘要
整体锻造挤压辊是整个辊压机的关键部件,形状短粗,是大型粗短轴类零件的代表,锻透性较差;空洞型缺陷是造成产品合格率低的一个重要因素,必须消除。本文利用Deform-3D模拟软件,对两次镦拔新工艺应用于RP170-110挤压辊的第1次镦拔过程进行了理论验证。通过对镦粗后采用WHF法和FM法拔长过程的数值模拟结果进行对比,说明两次镦拔新工艺中的第1次镦拔工艺—镦粗+WHF法拔长能够在足够大的三向压应力状态下,在再结晶温度以上愈合孔洞型缺陷,提高了大型短粗轴类锻件的锻透性。8件锻件全部试制合格的结果也证明了两次镦拔新工艺第1次镦拔的合理性。
Squeeze roll of large podgy shape forged by whole forging process is a key part of roller press, which shape is short ＆ crude and forging penetration effect is worse. Voids, an important factor resulting in eligibility rate lower, must be avoided. Using the simulation software Deform-3D, the first process of the two times upsetting and stretching was validated theoretically used in forging RP170-110 squeeze roll. Simulation results of WHF-stretching and FM- stretching after upsetting show that using the first of the two times upsetting and stretching--upsetting q-WHF-stretching, the enough compression stress appeared not only eliminate most voids at recrystallization temperature, but also obtain better forging penetration. Eight trial products are all up to the grade also proves the rationalization of the technical process.
出处
《锻压技术》
CAS
CSCD
北大核心
2007年第6期50-53,共4页
Forging & Stamping Technology
关键词
挤压辊
镦粗
拔长
孔洞型缺陷
数值模拟
squeeze roll
upsetting
stretching
voids defect
numerical simulation
