斜撑离合器楔块线切割工艺优化及变质层分析  

Optimization of WEDM Technology and Metamorphic Layer Analysis of PCE Clutch Sprag

作　　者：严宏志[1] 王祎维 张诗颖[1] 赵聪[1] 刘志辉[1] 

机构地区：[1]中南大学机电工程学院,长沙410012

出　　处：《宇航材料工艺》2015年第6期60-65,共6页Aerospace Materials & Technology

基　　金：湖南省创新平台与人才计划项目(2015JC3007);国家重点基础研究项目(2011CB706800-G);教育部博士点基金项目(20120162110004)

摘　　要：对目前国内PCE型斜撑离合器楔块制造工艺进行概述。为制造高质量的斜撑离合器楔块,提出了一种以慢走丝线切割为核心的楔块加工工艺,采用正交方法对线切割电参数进行了匹配实验,采用扫描电镜对线切割试样表面进行分析。实验结果表明,影响线切割表面粗糙度的因素顺序为脉宽、休止时间、伺服倍率、起始电压,线切割表面存在结构疏松、含Cu和Zn元素、厚度约为15~20μm的变质层。The manufacturing process of PCE （positive continuous engagement） type sprag clutch in China now- days was summarized. In order to manufacture high-quality sprag clutch, a processing technology of sprags based on the WEDM-LS（ low speed wire cut electrical discharge machining）was proposed. Adopting orthogonal method to exper- iment on wire cutting electrical parameters and analysizing surfaces of wire cutting sample with scanning electron mi- croscope. The result shows that the sequence of factors effecting the surface roughness is pulse width, stop time, the servo ratio and the initial voltage, and there is a loose structure on the metamorphic layer, which contains Cu and Zn and with the thickness of about 15 to 20μm.

关 键 词：PCE型离合器 制造工艺 线切割 变质层 

分 类 号：TH162[机械工程—机械制造及自动化]