使用聚晶金刚石（PCD）刀具,对碳化硅颗粒增强铝基复合材料（SiCp/Al）进行高速铣削加工,研究了加工表面质量及切屑的形成机制。结果表明：刀具进给波纹、工件材料塑性侧流、刀具-工件相对振动和增强颗粒去除过程留下的孔洞、微裂纹、基体撕裂等是SiCp/Al复合材料高速铣削加工表面的主要形成机制;增大切削速度、使用冷却液、降低增强颗粒体积分数、减小增强颗粒尺寸均有助于提高加工表面质量;切屑形态为不均匀锯齿状,增强颗粒体积分数、热处理状态等对切屑形成有显著影响,绝热剪切、孔洞/微裂纹动态形成和扩展是切屑的主要形成机制。
Polycrystalline diamond tools（PCD） were selected to study surface and chip generation mechanisms during high-speed milling SiC-particle-reinforced aluminum matrix composites（SiCp/Al）.The results show that feed marks,materials swelling and side flow,tool-workpiece relative vibration,pits produced during removing reinforment particles,micro-cracks and matrix tearing were the main generation mechanisms of SiCp/Al composites surface during high-speed milling.The machined surface quality could be improved by increasing cutting speed,using coolant,decreasing volume fraction of reinforcement particles,decreasing reinforcement particles size.The chip took uneven sawtooth-like,reinforcement volume fraction and heat treatment condition of matrix had remarkable effects on chip formation.The mechanism of chip were dynamic formation and expending of adiabatic shear,pits and micro-cracks.
参考文献
| [1] | 张学习,王德尊,姚忠凯,赵敏海.非连续增强金属基复合材料的应用[J].航空制造技术,2002(05):35-38. |
| [2] | D.B. Miracle .Metal matrix composites - From science to technological significance[J].Composites science and technology,2005(15/16):2526-2540. |
| [3] | Caroline J. E. Andrewes;Hsi-Yung Feng;W. M. Lau .Machining of an aluminum/SiC composite using diamond inserts[J].Journal of Materials Processing Technology,2000(1/3):25-29. |
| [4] | N. Suresh Kumar Reddy;Shin Kwang-Sup;Minyang Yang .Experimental study of surface integrity during end milling of Al/SiC particulate metal-matrix composites[J].Journal of Materials Processing Technology,2008(1-3):574-579. |
| [5] | 李丹,闫国成.颗粒增强铝基复合材料铣削加工实验研究[J].现代制造工程,2007(03):15-17,67. |
| [6] | 吴震宇,王学根,孙方宏,陈明.SiC颗粒增强铝基复合材料高速铣削工艺研究[J].工具技术,2004(03):15-18. |
| [7] | 许立福,于晓琳,周家林,周丽,黄树涛.PCD刀具高速铣削SiCp/Al复合材料的表面粗糙度研究[J].沈阳理工大学学报,2009(01):41-43. |
| [8] | 全燕鸣,周泽华.硬脆颗粒增强金属基复合材料切削区的变形[J].华南理工大学学报（自然科学版）,1998(04):27. |
| [9] | 宫能平,周元鑫,夏源明.应变率对SiC颗粒增强铝基复合材料拉伸性能的影响[J].力学季刊,2000(04):415-420. |
| [10] | 周泽华.硬脆颗粒增强金属基复合材料的切屑形成机理[J].华南理工大学学报（自然科学版）,1998(08):27. |
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