阶梯轴改锻中台阶变形规律及拔长工艺探讨  

Shape Changing Process of Steps on Stepped shafts during Re-forging operation and Drawing Technique

作　　者：郑会赛 胡晓琦 季雪[1] 曹志远[1] 

机构地区：[1]天津重型装备工程研究有限公司,助理工程师天津300457 [2]海军驻齐齐哈尔地区某军事代表室,工程师黑龙江齐齐哈尔161000

出　　处：《一重技术》2014年第3期29-32,共4页CFHI Technology

摘　　要：带有台阶的大型轴类锻件在改锻过程中,难度最大的是对台阶区域的拔长,尤其是当台阶直径落差较大时,往往会在台阶根部小圆造成径缩形成的折叠缺陷。而通过改变布砧方式可以改变台阶与坯料轴线的垂直状态,减小拔长过程中台阶端部金属的轴向伸长,消除折叠缺陷。通过数值模拟的方法对不同布砧方式的拔长过程进行分析,可以找到最佳布砧方式。In the forging operation for re-using stepped shaft forgings, the most difficulty is to draw the step area , especially when the diameter changes greatly. In this case, the diameter reduction caused by the small circle on the step root can produce a folding defect. The folding defect can be eliminated by changing the way to arrange hammering blocks to alter the perpendicularity of the step to the forging in order to reduce the axial extension of the metal on the step end during drawing operation. The drawing operations with different hammering block arrangements are analysed by the means of numerical simulation to find out the best hammering block arrangement.

关 键 词：拔长 折叠缺陷 布砧 

分 类 号：TG316.12[金属学及工艺—金属压力加工]