摘要
以大型饼类锻件为研究对象,运用有限元法对不同角度的锥形板和强制冷却的工艺进行了模拟,分析了不同角度下的锥形板镦粗对锻件内部应力状况的影响,探索了可行的锥形板镦粗工艺。研究表明,锥形板镦粗工艺适用于大压下量的场合。在经过预先快速冷却的情况下,当压下量为80%时,可以选用角度为130°~150°的锥形板进行镦粗。经过预先快速冷却后再进行镦粗,压应力数值更大,有利于内部空洞闭合,且外表面没有出现太大的拉应力,不易产生表面裂纹。
For large disk-shaped forgings, the finite element method was adopted to simulate the upsetting pro- cessing with conic plates of different angles, and that process after forced cooling. The influence of different angles of the conic plates on the internal stress in the upsetting forging was analyzed. The feasible upsetting process with cone plate was explored. The research shows that the cone-shaped upsetting process is suitable for large reduction occasions. After the pre-rapid cooling, when the reduction is 80%, the cone plate angle of 130 ~ 150 degrees can be chosen. After the pre-rapid cooling, the absolute value of compressive stress tends to become larger than that during conventional upsetting process, more conducive to void closure. There is no big tensile stress at the outside of the forging, preventing the surface crack.
出处
《装备制造技术》
2017年第5期91-93,136,共4页
Equipment Manufacturing Technology
基金
广东省基础与应用基础研究专项资金(2016年广东省自然科学基金
编号1614050000138)
广东省大学生科技创新培育专项资金(编号pdjh2016b0910)
关键词
锥形板镦粗
快速冷却
压实
强制冷却
cone plate upsetting
rapid cooling
solidify
forced cooling
