孕镶金刚石钻头加工工程陶瓷的性能研究  

Performances of Diamond Impregnated Bit in Hole Drilling of Engineering Ceramics

作　　者：郑雷[1] 袁军堂[1] 李少华[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《南京理工大学学报》2007年第5期574-578,584,共6页Journal of Nanjing University of Science and Technology

摘　　要：根据工程陶瓷的性能特点,研制了孕镶金刚石钻头并对其进行孔加工实验研究。从工具磨损、工具寿命、加工效率及加工质量等方面对钻头加工工程陶瓷的性能进行了全面分析。发现钻头的整个磨损过程可分为3个阶段;孔加工时间随孔数近似呈周期性变化;钻压和钻头壁厚适当时,可获得更高的加工效率或者工具寿命。针对工程陶瓷的孔加工缺陷,提出了预压应力钻削法以改善其入、出口的加工质量。结果表明:所研制的金刚石钻头完全胜任工程陶瓷的磨削钻孔加工。该文成果为孕镶金刚石工具在工程陶瓷孔加工领域的应用提供了技术基础。According to the mechanical characteristics of engineering ceramics, the special diamond impregnated bits are developed for hole drilling. The cutting performances of the bits are analyzed from the following aspects, such as bit wear, working life, machining efficiency and machining qual- ity. The results show that： the whole bit wear process can be divided into three phases; the regulari- ty of the machining time per hole with the number of holes machined is close to a periodic variation; higher machining efficiency or working life can be obtained when the drilling pressure and the wall thickness of the bit are advisable. Aiming at the drilling defects in engineering ceramics, drilling with compressive pre-stress is proposed. Experimental results show that the bit is suitable for the drilling of engineering ceramics. Research achievements provide technical bases for the application of diamond impregnated bits in hole drilling of engineering ceramics.

关 键 词：工程陶瓷 孕镶金刚石钻头 加工性能 预压应力钻削 

分 类 号：TB321[一般工业技术—材料科学与工程] TG713[金属学及工艺—刀具与模具]