动车空心车轴中孔加工工艺与装备研究  

Research on Deep Hole Processing Technology and Equipment of EMU Hollow Axle

作　　者：王继明[1,2] 于大国[1,2] 孟晓华[1,2] 

机构地区：[1]中北大学机械与动力工程学院,太原030051 [2]山西省深孔加工工程技术研究中心,太原030051

出　　处：《组合机床与自动化加工技术》2014年第7期132-135,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(51175482);中北大学自然科学基金项目(2012111)

摘　　要：针对动车车轴中孔加工过程中轴线易偏斜、孔的表面粗糙度难以保证的问题,从结构和材料分析,对其加工工艺及装备做了研究,从工装设计方面,利用支撑架及导向套等措施解决加工过程中BTA单齿钻的偏斜问题;从加工工艺方面,利用"二次珩磨"保证孔的表面粗糙度。结果表明:采用该工艺加工动车空心车轴中孔,孔的直线度可达到0.05mm/m,内表面粗糙度可达到Ra(0.2-0.4)μm,均能够满足相应的技术要求。经检验,动车空心车轴内部探伤无缺陷,符合标准。Aiming at axial deviation and surface roughness which are difficult to guarantee in EMU hollow axle drilling.This paper analyzes processing technic and machining equipment on the basis of structure and material properties.It solves the problem of BTA single tooth drilling＇s skewing by using support frames and guide sleeves.Using ＂ second honing＂ to guarantee hole surface roughness is based on processing technology.The results show that the straightness can reach 0.05mm / m and the inner surface roughness can be achieved Ra （0.2-0.4）μm when the technology is taken in processing EMU hollow axle hole.Both are able to reach the corresponding technical requirements.EMU hollow axle is non-defective after being tested,conforming to the standard.

关 键 词：动车车轴 BTA单齿钻 偏斜 二次珩磨 粗糙度 

分 类 号：TH162[机械工程—机械制造及自动化] TG65[金属学及工艺—金属切削加工及机床]