摘要
对不同增强相体分比、颗粒尺寸和基体材料的Si CP/Al复合材料进行切削试验,分析了铝基体材料和颗粒尺寸对高、低增强相体分比Si C_p/Al复合材料切削力的影响。针对Si C_p/Al复合材料切削力的复杂性,提出用分形维数的方法定量描述切削力波动的复杂程度。对不同铝基体Si C_p/Al复合材料进行刀具磨损试验,研究铝基体对刀具磨损的影响。结果表明:随着增强相体分比和颗粒尺寸的增加,铝基体对切削力的影响减弱;随着增强相体分比增加,颗粒尺寸对于切削力影响有增大趋势;分形维数可以定量描述切削力波动性质,且Si C_p/6063Al切削力波动频率高于Si C_p/2024Al;相对于Si C_p/2024Al,切削Si C_p/6063Al时刀具前刀面粘结磨损加剧而颗粒磨损减少,刀具后刀面磨损程度相对较高。
Si C_p/Al cutting experiment with different volume fraction ratio,particle size and Al matrix materialis done.The different influences of matrix material and particle size on cutting force between PMMC with low and high volume fraction ratio is analyzed. In view of the complex fluctuation of cutting force of this material,the fractal dimension is proposed for quantitative description of fluctuation. A tool wear experiment made to study the influence of matrix material on tool wear. The results show that the influence of matrix materials to cutting force reduced and the influence of particle size increased with the increase of volume ratio of Si C. The fractal dimension can describe the extent of fluctuation. The fluctuation frequency of cutting force of Si C_p/6063 Al is higher than Si C_p/2024 Al. Compared to Si C_p/2024 Al,the tool wear of rake faceincludes more adhesion wear and less particle wear when cutting Si C_p/2024 Al. The degree of tool wear of flank face is relatively high.
出处
《工具技术》
2018年第1期40-44,共5页
Tool Engineering
