多工位精密热挤压成形控制新工艺  

New process on multi-station precision hot extrusion forming control

作　　者：胡圣华 潘立栋 郭永强 Hu Shenghua;Pan Lidong;Guo Yongqiang(China Machinery Vacuum Heat Treatment Technology(Jinan)Co.,Ltd.,Jinan 250200,China;China Academy of Machinery Beijing Research Institute of Mechanical&Electrical Technology Co.,Ltd.,Beijing 100083,China)

机构地区：[1]中机真空科技(济南)有限公司,山东济南250200 [2]中国机械总院集团北京机电研究所有限公司,北京100083

出　　处：《锻压技术》2024年第9期74-80,共7页Forging & Stamping Technology

摘　　要：制造深筒形件常用的加工方法为反挤压成形工艺,在热成形反挤压过程中,基于解决复杂工况环境下各种因素导致的筒形件壁厚差问题,提出了一种多工位精密反挤压成形控制新工艺。使用模拟软件对成形过程进行数值模拟,对多工位成形从壁厚差遗传的角度进行了分析。结果表明,多工位反挤压成形能够有效纠正壁厚差,变形量越小时对壁厚差进行纠正越有利于改善最终产品的壁厚差。筒形零件多工位反挤压尺寸稳定性试验结果表明,3工位成形壁厚差和高度差远优于2工位成形,改善温度条件和摩擦条件后,产品壁厚差幅度和高度差幅度会更小。The common processing method for manufacturing deep cylindrical parts is the backward extrusion forming process.In the hot forming backward extrusion process,a new process on multi-station precision backward extrusion forming control was proposed to solve the problem of wall thickness difference in cylindrical parts caused by various factors in complex working conditions.And the numerical simulations of forming process were conducted by simulation software to analyze the multi-station forming from the inheritance of wall thickness difference.The results indicate that the multi-station backward extrusion forming effectively corrects wall thickness difference,the smaller the deformation amount,the more beneficial it is to correct the wall thickness difference in the final product.The size stability test results of multi-station backward extrusion for cylindrical parts show that the wall thickness difference and height difference of three-station forming process are much better than those of two-station forming process.Thus,after improving temperature and friction conditions,the deviation amplitude of wall thickness and height for product is smaller.

关 键 词：反挤压 多工位 壁厚差 工艺稳定性 深筒形件 

分 类 号：TG376.2[金属学及工艺—金属压力加工]