密齿硬质合金涂层刀具铣削TC4钛合金试验研究
2019-03-14
作者：续文浩，刘公雨，安庆龙，陈明
单位：上海交通大学
摘要：利用单因素试验方法进行了密齿硬质合金涂层刀具铣削TC4钛合金试验，研究每齿进给量和切削速度对切削力、切削温度、加工表面粗糙度以及切屑形态的影响。结果表明：切削方向分力Fx、刀轴方向分力Fz随每齿进给量的增大而增大，进给方向分力Fy随每齿进给量的增加变化不大；切削速度小于75m/min时切削力随切削速度的增加下降较为明显；切削速度超过75m/min时切削力变化不大；切削温度受每齿进给量影响较大，且影响程度随进给量的增加而逐渐减小；随着每齿进给量fz的增大，加工表面粗糙度值先减小后增大；在每齿进给量高于004mm/z时，密齿铣刀铣削TC4钛合金得到的切屑为螺卷状，且随每齿进给量的增加，切屑的曲率半径减小，随切削速度的增大，螺卷状切屑的螺距减小。
关键词：密齿铣刀；铣削；TC4钛合金
中图分类号：TG714；TH161；TH142.2文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.03.002
Experimental Study on Milling of TC4 Titanium Alloy with Carbide Coated
Finepitched Milling Cutter
Xu Wenhao，Liu Gongyu，An Qinglong，Chen Ming
Abstract:By using the singlefactor test method，the TC4 titanium alloy milling test is performed with a finepitched milling cutter to determine the effect of feed rate and cutting speed per tooth on cutting force，cutting temperature，surface roughness and chip shape.The results show that the component forces in Fx and Fz directions increase，and the feed direction component force Fy does not change much with the increase of the feed rate per tooth；When the cutting speed is less than 75m/min，the cutting force decreases with the increase of cutting speed，when the cutting speed exceeds 75m/min，the cutting force does not change much.The cutting temperature is affected more by the feed rate，and the influence degree gradually decreases with the increase of the feed rate.With the increase of the feed rate，the machined surface roughness decreases first and then increases.When the feed per tooth is higher than 0.04mm/z，the chips produced by the milling TC4 titanium alloy are coiltype，and the radius of the chip decreases with the increase of the feed rate.The pitch of the coil shaped chip reduces with the increase of cutting speed.
Keywords:finepitched milling cutter；milling process；TC4 titanium alloy