摘要
针对离心式压缩机、空分压缩机等航空装备领域及其加工制造装备中的关键零部件——大型法兰端盖内部流体通道(又称内部弯曲孔)的加工难题,提出了一种内部流体通道的电火花加工方法,研究了用于内部流体通道电火花加工的柔性传动装置的实现结构,研制了弯曲避让结构、绝缘和排屑结构及内部流体通道电火花加工工艺技术,解决了传统加工方法工序多、成本高,多开辅助孔影响零件寿命,易开裂造成毒液气泄漏、增加安全隐患的问题。加工内部流体通道直径可达15~20mm,测试样件两端孔与内部流体通道共面度≤0.8mm,且对接处光滑过渡,表面粗糙度Ra≤3.2μm,可实现多种倾斜角度的内部流体通道的加工,为各领域相似结构零部件的设计和制造提供了一种行之有效的方法。
The large flange cover is one of the key components of centrifugal compressor and air separation compressor that is utilized in the aviation equipment,and the machining of the flow channel inside flange cover is a difficult problem.An electrical discharge machining method for machining an internally curved flow channel is proposed.The structure of a flexible transmission device used for EDM internal flow channel machining is studied.The bending avoidance technology,insulation&chip removal technology and EDM processing technics are prepared.Using this new method could solve the traditional mechanical processing problems,such as shorten parts service lives by drilling auxiliary holes,solve the high security risks that are caused by toxic liquid and gas leakage for easy cracking of the welding position,complex procedures and high costs.The method can achieve the high efficiency and high precision machining of the flow channel with various inclination angles.The experimental results show that this method can be used to process internal curved holes with diameter ranged from15mm to20mm,bending joint smooth transition and two hole docking at the accuracy of not less than0.8mm,surface roughness less than Ra3.2μm.This method of EDM provides an effective method for the manufacture of components with internally curved flow channel.
作者
任连生
闫明芳
郭建梅
郭妍
张世富
薛吉
伏金娟
REN Liansheng;YAN Mingfang;GUO Jianmei;GUO Yan;ZHANG Shifu;XUE Ji;FU Jinjuan(Beijing Key Laboratory of Electrical Discharge Machining Technology, Beijing 100191, China;Beijing Institute of Electro-Machining, Beijing 100191, China;Beijing Dimeng CNC Technology Co., Ltd., Beijing 100191, China;Shenyang Blower Works Group Corporation, Shenyang 110142, China)
出处
《航空制造技术》
2018年第3期36-40,共5页
Aeronautical Manufacturing Technology
基金
国家科技重大专项(2015ZX04002201)
关键词
电火花加工
流体通道
柔性传动
弯曲避让
电加工参数
Electrical discharge machining (EDM)
Flow channel
Flexible transmission
Bending avoidance
Parameter of EDM
