正交切削SiCp/Al复合材料的切削力分析

2018-06-15

作者：段春争，傅程，孙伟，冯占单位：大连理工大学

摘要：通过PCD刀具对SiCp/Al复合材料的正交切削试验，分析了切削用量、铝基体材料、颗粒体分比和颗粒尺寸对切削力大小和波动以及切屑形态的影响。结果表明：对于中高体分比的SiCp/Al复合材料，其切削速度与基体材料对切削力影响不大，切削力随进给量增大呈线性关系增长，随颗粒尺寸增大切削力下降，且颗粒体分比越大，下降幅度越大；切削力波动与刀—屑接触区颗粒数量有关，随颗粒尺寸增大切削力波动减小，随进给量和切削速度增大切削力波动增大；进给量一定时，在高的切削速度和低的颗粒体分比下，SiCp/Al复合材料易形成卷曲状切屑，且随着进给量增大，切屑卷曲半径增大。

关键词：SiCp/Al复合材料；切削力；切屑形态

中图分类号：TG115.6+3；TH140.7文献标志码：A

Experimental Study on Cutting Force of Orthogonal Cutting SiCp/Al Composite

Duan Chunzheng，Fu Cheng，Sun Wei，Feng Zhan

Abstract:Through orthogonal experiments on cutting SiCp/Al composites with PCD tools，the effects of cutting parameter，aluminum matrix material，enhanced phase volume fraction ratio and particle size on the cutting force and its fluctuation ，the chip morphology are comprehensively analyzed.The results show that the cutting speed and the matrix material have little effects on the cutting force.The cutting force increases linearly with the increase of the feed rate.With the particle size increasing，the cutting force decreases，and the larger particle fraction ratio becomes，the greater the cutting force declines.The fluctuation of the cutting force is related to the particle number in the tool-chip contact area，and with the particle size increasing，the cutting force fluctuation decreases，and with feed rate and cutting speed increasing the cutting force fluctuation increases.Under the condition of high cutting speed and low particle size，crimped chips are easy to be form，and with the feed rate increasing，the chip crimp radius increases.