Enhancement of Surface Integrity in Turning of Particle74 Reinforced Aluminium Matrix Composites by Tool Design
Enhancement of Surface Integrity in Turning of Particle74 Reinforced Aluminium Matrix Composites by Tool Design
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DOI：
10.1016/j.proeng.2011.11.116
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Schubert;A. Nestler
中科院分区：
文献类型：
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作者：
A. Schubert;A. Nestler
颗粒增强铝基复合材料（AMC）是由相对较软的铝合金和硬质陶瓷颗粒组成的高强度轻质材料。颗粒的高硬度导致优异的耐磨性。然而，这种性质导致了差的机械加工性，包括高的工具磨损和工件上的表面缺陷。为此，CVD金刚石刀片可转位刀片用于车削具有25%体积比例的SiC颗粒的AA2124。表面完整性受工具几何形状的影响，工具几何形状影响剪切区中的应力条件。在研究中描述的影响修改的角落几何形状和宽度的后刀面磨损土地进行了调查。结果表明，表面粗糙度值可以通过使用具有刮水器几何形状的工具来降低。增加刀片的后刀面磨损刃带宽度导致表面缺陷减少。
Particle reinforced aluminium matrix composites (AMCs) are high-strength lightweight materials consisting of a comparatively soft aluminium alloy and hard embedded ceramic particles. The high hardness of the particles results in excellent abrasion resistance. However, this property lends poor machinability involving high tool wear and surface imperfections on the workpieces. For this reason, CVD diamond tipped indexable inserts were used for turning AA2124 with 25% volume proportion of SiC particles. The surface integrity is influenced by the tool geometry, which affects the stress condition in the shear zone. In the research described the influence of modified corner geometries and the width of flank wear land were investigated. The results showed that surface roughness values can be decreased by using tools with a wiper geometry. An increasing flank wear land width of the inserts led to a reduction of the surface imperfections.