液体磁性磨具光整加工TC4钛合金的试验研究  

Experimental study on TC4 titanium alloy by fluid magnetic abrasive finishing

作　　者：刘智 孙桓五 侯治秀 桑媛园 段海栋 纪刚强 Liu Zhi;Sun Huanwu;Hou Zhixiu;Sang Yuanyuan;Duan Haidong;Ji Gangqiang(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;National Demonstration Center for Experimental Coal Resource and Mining Equipments Education,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,太原030024 [2]煤炭资源开采利用与装备工程国家级实验教学示范中心,太原030024

出　　处：《现代制造工程》2020年第1期29-34,共6页Modern Manufacturing Engineering

基　　金：国家自然科学基金项目(51075294);山西省自然科学基金项目(201601D101060);精密与特种加工教育部重点实验室开发课题(JMTZ201603)

摘　　要：为解决TC4钛合金材料难加工问题,采用液体磁性磨具对TC4钛合金进行了表面加工试验。通过调整工艺参数,采用田口方法对TC4钛合金液体磁性磨具光整加工的工艺参数进行优化。采用单因素试验法,研究磨料类型、磨料粒径、工件转速和电流强度等工艺参数对液体磁性磨具光整加工TC4钛合金材料加工性能的影响,并总结各工艺参数对工件表面粗糙度的影响规律。根据信噪比的望大特性分析得出,在液体磁性磨具光整加工TC4钛合金材料的加工过程中,当使用2000目的白刚玉,主轴转速为500 r/min,电流强度为1.5 A加工时,工件表面粗糙度相对下降率%ΔRa达到了86.10%。液体磁性磨具光整加工TC4材料表面的最优工艺参数组合为:2000目的白刚玉,主轴转速为700 r/min,电流强度为2.0 A。同时得出各工艺参数对工件表面粗糙度相对下降率%ΔRa的影响大小依次为:磨料类型>磨料粒径>工件转速>电流强度。当采用2000目的白刚玉配置的磨料进行加工时,工件的表面粗糙度Ra达到了0.096μm。采用液体磁性磨具光整加工技术可以有效地降低TC4钛合金材料的表面粗糙度和提升其工件表面加工质量,显著改善了传统加工方式中存在的烧蚀和烧伤现象。To solve the problem of difficult machining of TC4 titanium alloy,fluid magnetic abrasive was used to finish TC4 titanium alloy.An experimental device for finishing TC4 titanium alloy with fluid magnetic abrasive was developed on the CNC milling machine platform.By adjusting the technological parameters,TC4 titanium alloy fluid magnetic abrasive finishing process parameters were optimized by using Taguchi method.Single factor test method was used to study the influence of abrasive type,abrasive particle size,workpiece speed and current intensity on the machining performance of TC4 titanium alloy processed by fluid magnetic abrasive finishing process,and the influence law of various technological parameters on the surface roughness was summarized.According to the properties of at large signal-to-noise ratio analysis,draw in fluid magnetic abrasive finishing machining in the process of TC4 titanium alloy material,when using white corundum 2000 mesh,the spindle speed of 500 r/min,the intensity of electric current of 1.5 A,surface roughness of workpiece relative decline rate%ΔRa was 86.10%.The optimal combination of parameters for finishing TC4 surface with fluid magnetic abrasive are:white corundum for 2000 mesh,spindle speed of 700 r/min,current intensity of 2.0 A.And various process parameters on surface roughness relative decline rate%ΔRa order as follows:the influence of the abrasive type>abrasive particle size>workpiece speed>current strength.The surface roughness Ra of the workpiece reaches 0.096μm with 2000 mesh white corundum.Fluid magnetic abrasive finishing technology can effectively reduce the surface roughness of TC4 titanium alloy material and improve its surface quality,and avoid the shortcomings of other processing methods.

关 键 词：液体磁性磨具 光整加工 TC4钛合金 田口方法 表面粗糙度 

分 类 号：TG580.631[金属学及工艺—金属切削加工及机床]