
ISSN1000 3762 CN41 1148/TH
轴承2016年6期 Bearing 2016,No.6
工程塑料冠形保持架加工工艺改进
何崇光1,2,3,郭鑫1,2,3,徐海利",2,3
471039;3.滚动轴承产业技术创新战略联,河南洛阳471039)
26 27,38
摘要:分析工程塑料冠形保持架原加工工艺与铣缺口夹具存在的不足,重新设计了钻孔与铣缺口夹具,实现了一次装夹完成加工,消除了定位误差,减小了保持架变形,实践证明改进后加工工艺有效保证了保持架的加工精度,
关键词:球轴承;冠形保持架;工程塑料;夹具:钻孔;铣缺口
中图分类号:TH133.33:TG751
文献标志码:B
文章编号:10003762(2016)06002602
ImprovementonProcessTechnologyforCrownCagesMadeof
EngineeringPlastics
He Chongguang'-2.3, Guo Xin'.2.3 , Xu Hailil-2.3
( 1. Luoyang Bearing Secience & Technology Co. , Lid. ,Lauoyang 471039, China; 2. Key Laboratory of High Performance Bearing Technology of Henan,Luoyang 471039, China; ; 3. Strategic Alliance for Technology Innovation in Rolling
Bearing Industry , Luoyang 471039 , China)
Abstract : The deficiencies of original process technology for crown cages made of engineering plastics and fixture for milling of notch are analyzed. The fixture for dilling and milling of notch are redesigned, and the machining is realized through one time clamping. The positioning erors are eliminated, and the deformation of cages is reduced. The prac-
tice shows that the machining precision of cages is effectively guaranteed after improvement. Key words: ball bearing; crown cage; engineering plastic; fixture; drilling; milling of notch
1工程塑料冠形保持架结构特点
冠形保持架适用于转速较高或旋转精度高的深沟球轴承或角接触球轴承,材料一般为碳素钢,黄铜等金属材料,也采用工程塑料,如:聚酰胺(尼龙)、聚四氟乙烯、聚酰亚胺等。工程塑料具有力学性能优异、韧性好、耐磨性能好、摩擦因数低、自润滑性能好等特点,故更适用于高速或高精密轴承。工程塑料多采用注塑成型,考虑到模具成本,中小批量生产时也可采用车、铣、钻等机加工方法。机加工冠形塑料保持架结构如图1所示,兜孔
收稿日期:2015-10-28;修回日期:2016-01-15
作者简介:何禁光(1988一),男,工程师,主要从事精密滚动轴承加工工艺及工装设计工作,E-mail:zyshcg@126 com
一侧有装球缺口,兜孔与装球缺口需要通过钻、铣的方法加工。
图1工程塑料冠形保持架
Fig. 1Crown cage made of engineering plastic
2
原加工工艺及存在的问题
2.1
工艺过程
原加工工艺过程为:车端面、切断→车另一端面一→粗车外径面→粗车内径面一→精车内径面→精车外径面一→钻兜孔一→铣缺口。兜孔、装球缺口分