Ti-6Al-4V合金激光辅助铣削的刀具磨损特性

摘要/Abstract

摘要： 对激光辅助铣削钛合金Ti-6Al-4V进行了实验研究，分析了切削力、切屑形貌和刀具的磨损特性。结果表明，与普通铣削相比，激光辅助铣削条件下，刀具切向的切削力明显减小，刀具径向的切削力略有增大；随着激光功率的增大，钛合金切屑呈现出从锯齿形向连续形过渡的特征，不再具有明显的绝热剪切带；与普通铣削时刀具崩刃的损伤不同，激光辅助铣削时刀具的磨损主要表现为后刀面磨损;激光辅助铣削可以减小后刀面的最大磨损量，但并不能改善后刀面平均磨损量。激光辅助铣削时，刀具寿命得到了延长，当后刀面的平均磨损量在0.15~0.20mm之间时，可以降低刀具的磨损速度，从而延长刀具的使用寿命，但激光辅助铣削并不能降低刀具的初期磨损速度。

关键词: 钛合金, 激光辅助铣削；加工；刀具磨损

Abstract: Cutting forces, chip morphology, and tool wear mechanism during LAM processes for Ti-6Al-4V alloy were investigated experimentally herein. The results show that, under the LAM conditions, the tangential cutting forces of the cutting tool decrease significantly, while the radial cutting forces of the cutting tool increase slightly. With the increasing of laser power, the saw-tooth chips gradually transform to the continuous chips, and the adiabatic shear bands are disappeared. Different from the break edge tool wear during the conventional milling processes, the frictional wear is the main wear pattern during LAM processes, which is beneficial to reduce the maximum wear values on the tool flank, but it may not reduce the average wear values on the tool flank. The tool life is prolonged during LAM processes. When the mean wear extent of flank in the range of 0.15~0.20mm, the wear speed of cutting tool is reduced. It manifests that the LAM may not reduce the initial wear speeds of cutting tools.

Key words: titanium alloy, laser assisted milling(LAM), machining, tool wear

中图分类号:

TP391.7

高延峰, 肖建华. Ti-6Al-4V合金激光辅助铣削的刀具磨损特性[J]. 中国机械工程.

Gao Yanfeng, Xiao Jianhua. Characteristics of Cutting Tool Wear during LAM Processes for Ti-6Al-4V Alloy[J]. China Mechanical Engineering.

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