MACHINED SURFACE TEXTURE AND ROUGHNESS OF COMPOSITES
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摘要: 普通金属材料的切削加工理论表面粗糙度可以用公式计算。复合材料经切削加工后其表面留有各种凹凸缺陷,这些谷峰轮廓并非由刀刃直接切出,故不宜用现有普通材料的公式计算其理论表面粗糙度。纤维增强复合材料的切削加工表面结构和粗糙度与切削方向密切相关。颗粒增强复合材料无方向性,其已加工表面结构和粗糙度主要受增强颗粒硬度和粒度以及含量控制。增强体与基体的界面强度及切削刀具和工艺条件对复合材料加工表面粗糙度有很大影响。Abstract: The theoretical roughness of machined surface of common metal materials can be calculated using the current formula. However, the machined surface of composites may include a variety of machining defects, and their concave or convex defects may not form directly by the cutting of tool edge. So, the current formula for the calculation of theoretical roughness of conventional metal materials is unsuitable for composites. The machined surface texture and roughness of composites reinforced by fiber are closely-related to the cutting direction. Though the composites reinforced by particles is isotropic, their machined surface textures and roughness are mainly controlled and dominated by the hardness and the volume as well as the size of the reinforcing particle. The interface strength between the reinforce and the matrix, the cutting tool and machining parameters affect the machined surface roughness of composites signally.
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Keywords:
- composite /
- machined surface /
- surface texture /
- surface roughness
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