Composite holes by spiral milling at low stiffness have higher accuracy
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摘要: 针对复合材料构件空间狭小、加工可达性差、加工精度不足的问题,使用基于微刃切削原理的电镀金刚石磨具,在低刚度约束下螺旋铣磨制孔。通过理论分析磨粒切削长度和实验对比加工效果,发现:相较于普通硬质合金刀具,金刚石磨具的磨削力峰值降低30%,且普遍低于60 N;用金刚石磨具加工的孔边缘几乎无毛边,也不见磨削烧伤。采用微刃切削方法可降低切削力,减少加工毛刺,提高加工精度。Abstract: To solve the problems of machining composite components, such as narrow space, poor accessibility and low accuracy, electroplated diamond abrasives are used to spirally drill the material at low stiffness based on micro-edge cutting principle. Theoretical analysis on cutting length of abrasive and comparative test show that the cutting force of diamond tools is generally lower than 60 N, that the maximum of which is 30% lower than that of ordinary cemented carbide tools; and that there is no bur nor burn on the edge drilled by diamond tools. In conclusion, micro-edge cutting could decrease the force and burs, thus improving accuracy.
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Key words:
- micro-edge cutting /
- electroplated diamond abrasives /
- cutting force /
- machining burr
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