Purpose

The purpose of this paper is to examine the quality of the turned surface. The quality of the surface produced depends on the nature of the chips, which are produced while turning metal matrix composites. This quality is a function of the machining parameters, tool material, tool configuration and elements of the composites.

Design/methodology/approach

In this study, the turning of AA7075/15 wt.% SiC (particle size 20–40 µm) composites is investigated. Thirty experiments were conducted, and the chip-formation mechanism in turning AA7075/SiCp composites at various combinations of cutting speeds, feed and depth of cuts was studied.

Findings

It is observed from the response surface methodology-based experimentation that in turning of coarser reinforcement (particle size 20–40 µm) composites, total gross fracture occurs. This causes small slices of chips and a higher shear plane angle. The nature of chips produced at various combinations of cutting speeds, feed and depth of cuts is different. The chips generated were segmented, spiral in cylindrical form, connected C type, chips with saw tooth, curled chips, washer C type chips, half-curved segmented chips and small-radii segmented chips.

Originality/value

The novelty of this research is that, so far, very little work has been published on the detailed analysis of chips produced during turning of AA7075/15 wt.% SiC (particle size 20–40 µm) composites.

中文翻译：

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AA 7075/SiCp MMC 车削切屑形成机制分析

目的

本文的目的是检查车削表面的质量。所产生的表面质量取决于切屑的性质，切屑是在车削金属基复合材料时产生的。该质量是加工参数、刀具材料、刀具配置和复合材料元素的函数。

设计/方法论/途径

在本研究中，研究了 AA7075/15 wt.% SiC（粒径 20–40 µm）复合材料的车削。进行了 30 次实验，研究了在各种切削速度、进给量和切削深度组合下车削 AA7075/SiCp 复合材料时的切屑形成机制。

发现

从基于响应面方法的实验中观察到，在车削较粗的增强材料（粒径 20-40 µm）复合材料时，会发生总体断裂。这会产生小切片和较高的剪切平面角。在切削速度、进给量和切削深度的不同组合下产生的切屑的性质是不同的。产生的切屑有分段式、螺旋式、圆柱状、连接C型、锯齿状切屑、卷曲式切屑、垫圈C式切屑、半曲线分段式切屑、小半径分段式切屑等。

原创性/价值

这项研究的新颖之处在于，到目前为止，关于 AA7075/15 wt.% SiC（颗粒尺寸 20–40 µm）复合材料车削过程中产生的切屑的详细分析的工作很少发表。