摘要
利用球头刀铣削钛合金TC17,对其试件加工表面完整性测试开展实验研究。通过球头刀铣削实验和表面完整性测试实验结果可知,在给定的实验条件下,表面粗糙度R a随着每齿进给量f z的增大而增大,而线速度v c对表面粗糙度R a和表面微观形貌影响不显著。同时,球头刀铣削钛合金TC17的加工表面均呈残余压应力状态,其变化范围在-250^-450 MPa;加工表面显微硬度和残余压应力随着线速度v c的增大而减小,随着每齿进给量f z的增大而增大,其主要原因是随着线速度v c的增大、每齿进给量f z的减小,铣削加工表面的塑性变形层厚度逐渐减小。
The surface integrity of titanium alloy TC17 machined by ball-end cutters was studied.According to the specific ball-end milling experiments and surface integrity test experiments,it is concluded that under the given experimental conditions,the surface roughness R a increases with the increase of the feed per tooth f z,while the influence of cutting speed v c on surface roughness and surface micro-morphology is not significant.The surface of titanium alloy TC17 machined by ball-end cutters also showed a state of residual compressive stress,and the specific variation range was-250^-450 MPa;the micro hardness and residual compressive stress of the machined surface decrease with the increase of v c,and increase with the increase of f z,whose main reason is that as v c increases and f z decreases,the thickness of the plastically deformed layer on the milled surface gradually decreases.
作者
韩康宁
徐汝锋
李勋
HAN Kangning;XU Rufeng;LI Xun(Schoolof Mechanical Engineering,Shandong University of Technology,Zibo 255000,CHN;School of Mechanical Engineering&Automation,Beihang University,Beijing 100191,CHN)
出处
《制造技术与机床》
北大核心
2020年第8期31-35,共5页
Manufacturing Technology & Machine Tool
基金
国家科技重大专项(2018ZX04005001)
国家自然科学基金(51875028)
山东省重点研发计划(2019GGX104094)。
关键词
表面完整性
钛合金
TC17
铣削
球头刀
塑性变形
surface integrity
titanium alloy
TC17
milling
ball-end cutters
plastic deformation
