关键词: KFRP层合板；烧结金刚石钻头；钻孔机理；工艺装置；加工效率

Abstract:

Combining the application background of Kevlar fiber reinforced plastic (KFRP) in armor protection, the special sintering diamond bit was developed. By means of analyzing the drilling procedures, the drilling process was divided into six stages, according to the diverse material failure mechanisms of each stage. Also, the characteristics of various machining defects were summarized. Then, the process equipment with compressive pre-stress exerted on the drilling zone was proposed to improve the machining quality. Moreover, water could be used as the cutting coolant when drilling with compressive pre-stress. Through orthogonal experiments, the major factors influencing machining efficiency were optimized, which provides guides for parameter design and manufacture of the bit. Experimental results show that the processing technology is economical and practical. The drilling quality meets the technical requirements of KFRP bulletproof backboard. So, a new method for drilling KFRP is presented and this provides technical supports for the application of ceramics/KFRP double plate composite armor.

Key words: KFRP laminate；sintering diamond bit；drilling mechanism；process equipment；machining efficiency