YT28型气腿式凿岩机的设计与工艺改进

Improvement in Design and Process for YT28 Air-Leg Rock Drills

浙江开山钎具公司2000年开发的YT28凿岩机,存在下列问题:操纵阀关不死,调压阀锁不住,活塞拉缸,冲击转钎无力,钎卡、螺旋棒支耳易断,注水不灵,活塞、螺旋母、棘爪、钎套、阀组等零部件不耐用。本文从设计、工艺、热处理工艺方面较为详细地介绍了零件缺点分析过程及改进措施。改进后的凿岩机型号定为YT28A,综合性能稳定,成为畅销产品。

YT28 rock drills developed by Zhejiang Kai Shan Drilling Tools Co., Ltd. in the year 2000 have the following problems: control valve not closed tightly, pressure-regulating not locked well, cylinder scraped by piston,forceless impacting and rotation of the rod, easily broken-up steel pullers and spiral rod tags, failure of water filling,undurable piston, rifle nut, detents, drill sleeve, valve blocks, etc. The paper details the analysis of parts defects and improvement measures in terms of design, process and hot treatment. The improved rock drills use the model name YT28A, and emerge as popular products duo to their stable overall performance.