The Effect of Workpiece Characteristics on the High-speed Milling Machinability of SiCp/Al Composites
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摘要: 使用聚晶金刚石刀具(PCD),在切削速度为1 200 m/min下,研究了增强颗粒体分比与尺寸、热处理状态和冷却方式等对SiCp/2009Al复合材料高速铣削加工性的影响。结果表明:减小体分比或使用冷却液有助于明显改善SiCp/2009Al复合材料高速铣削加工性。材料经热处理后,加工表面质量明显提高,但切削力显著增大、刀具耐用度明显降低、切屑锯齿形更加明显。体分比一定时,在一定程度范围内增大增强颗粒尺寸有助于降低切削力和切削温度、延长刀具耐用度,但加工表面质量有所下降。
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关键词:
- SiCp/Al复合材料 /
- 高速铣削 /
- PCD刀具 /
- 加工性
Abstract: The effects of reinforcement's volume fraction and size,heat-treatment condition and cooling condition on the high-speed machinability were investigated when milling SiCp/2009Al composites at the cutting speed of 1200 m/ min using PCD tools. The results show that decreasing the volume fraction or using coolant will improve the high-speed milling machinability. When cutting the heat-treated composites,the machined surface is improved significantly but the increasing of cutting forces,decreasing of tool life and the tendency of producing saw-toothed chip are also evident. Keeping the volume fraction unchanged and increasing the average size of reinforcement will reduce the cutting forces and cutting temperature and prolong the tool life,but the machined surface quality will be decreased simultaneously.-
Key words:
- coolants /
- diamond cutting tools /
- heat treafment /
- machinability
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