超声振动精密铣削钛基复合材料试验研究  

Experimental Research on Ultrasonic Vibration Precision Milling Titanium Matrix Composites

作　　者：王大镇[1] 弓清忠[1] WANG Dazhen;GONG Qingzhong(College of Marine Equipment and Mechanical Engineering,Jimei University,Xiamen 361021,China)

机构地区：[1]集美大学海洋装备与机械工程学院,福建厦门361021

出　　处：《机械工程师》2022年第4期6-9,共4页Mechanical Engineer

基　　金：福建省自然科学基金项目(2019J01327)。

摘　　要：采用单因素法制定试验方案,对原位合成法制备的钛基复合材料用PCD铣刀在超声振动和普通铣削工况下进行高速铣削试验,通过铣削力、表面微观形貌及粗糙度、刀具磨损形态和机理研究该材料的加工特性。结果表明:超声振动铣削可以显著减小三向铣削力,原因是超声振动提高了系统的刚度。试验方案中存在着最佳铣削速度,在最佳铣削速度切削时会产生较小的切削力、适合的切削温度,有利于增强相被PCD刀具直接切断、晶须原位压入或向切削方向发生转动,从而在加工表面上明显减少微细划痕、犁沟、微孔洞、基体撕裂或熔融堆积等缺陷,获得纳米级的加工表面。PCD刀具前后刀面都没有月牙洼磨损产生,而是以犁沟状的磨损形态为主,机理是磨料磨损。The test plan is formulated with the single-factor method,the PCD milling cutter for titanium matrix composites prepared by the in-situ synthesis method is conducted to high-speed milling tests under ultrasonic vibration and ordinary milling conditions.The milling force,the micro-morphology and roughness of the machined surface,the wear morphology and mechanism of tools are used to study the processing characteristics of the material.The results show ultrasonic vibration milling can significantly reduce the three-way milling force,because ultrasonic vibration improves the stiffness of the system.There is an optimal milling speed in the test plan.When cutting in the optimal milling speed,a smaller cutting force and a suitable cutting temperature will be generated.It is beneficial for the reinforcements to be directly cut by the PCD tool,pressed into situ or rotated in the cutting direction,thereby significantly reducing defects such as scratches,furrows,micro-holes,matrix tearing or melting accumulation on the processed surface so that the nano-level machined surface can be obtained.There is no crescent wear on the rake face and the flank face of the PCD tool,but a furrow-like wear pattern is the main form,and the mechanism is abrasive wear.

关 键 词：超声振动 精密铣削 钛基复合材料 铣削力 磨损 

分 类 号：TH161.1[机械工程—机械制造及自动化]