ZHANG Peisen, LI Zhongxin

 

(School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

 

 

Abstract: In order to solve the problems of the drilling such as poor surface quality, axes′ decline when machining microholes by microcutting technology, the boring machining was investigated. After analysis of boring holes′ quality, the relationship between boring cutters′ sizes, feed speed, rotate speed and surface quality, dimensional accuracy were qualitatively established. Suitable parameter was presented to improve boring holes′ quality. By boring Ф2.7mm holes on 3J33 maraging steel, surface roughness and sizes of these holes were measured and analyzed. The experimental results show that boring microhole can get better dimensional accuracy, form accuracy, and surface quality than drilling.

 

Key words: boring; microcutting; processing technic