金刚石涂层立铣刀与PCD立铣刀切削铝合金性能研究

目的：研究金刚石涂层立铣刀和 PCD 立铣刀切削铝合金时，铝合金表面粗糙度以及刀具的使用寿命。方法通过实验比较1μm、5μm金刚石涂层四刃立铣刀和PCD立铣刀在高速干式切削条件下切削铝合金的性能，并通过走刀距离比较不同状态刀具的使用寿命以及在走刀过程中的粘刀情况，用表面粗糙度测量仪测量加工的铝合金表面粗糙度。结果1μm、5μm金刚石涂层立铣刀加工铝合金失效距离分别为25 m、75 m， PCD立铣刀加工铝合金96 m后失效；1μm、5μm金刚石涂层立铣刀切削铝合金表面粗糙度平均值分别为1.07μm、1.10μm，PCD立铣刀切削铝合金表面粗糙度平均值为0.80μm。结论5μm金刚石涂层立铣刀是1μm金刚石涂层立铣刀寿命的5倍，PCD立铣刀使用寿命最长；1μm、5μm金刚石涂层立铣刀切削铝合金表面较PCD立铣刀粗糙，在相同切削环境下切削铝合金时， PCD立铣刀使用寿命较金刚石涂层立铣刀提高，且在抑制粘刀方面效果十分明显。

Performance of Coating End Mill and PCD End Mill Cutting Aluminum Alloy

Objective To research the performance of coating end mill and PCD end mill on cutting aluminum ally. MethodsIn this paper, four-flute end mill with 1 μm diamond coating, four-flute end mill with 5 μm diamond coating and PCD end mill were taken as the objects to study the tool life and chip sticking situation, the feeding length of cutting aluminum alloy in the process of high-speed dry cutting of which was compared in the experiment, furthermore, the surface roughness of alu-minum alloy was tested with the surface roughness tester. ResultsThe resultsshowed that the failure distance of end mill with 1 μm diamond coating or 5 μm diamond coating was 25 meter or 75 meter and that of PCD end mill was 96 meter when cutting aluminum alloy. The average surface roughness of end mill with 1 μm diamond coating or 5 μm diamond coating was 1.07μm or 1.10μm and that of PCD end mill was 0.80μm.ConclusionThe life of the end mill with 5 μm diamond coating was four times more than that of the end mill with 1 μm diamond coating, while the PCD end mill has the longest service life. The roughness of end mill with 1 μm diamond coating or 5 μm diamond coating was higher than that of PCD end mill when cutting aluminum alloy. PCD end mill had longer life than diamond coating end mill and could also significantly reduce the sticking situation when cutting aluminum alloy in the same cutting environment.