摘要
针对自由曲面注塑模芯的精密加工困难的问题,提出在数控磨床上采用圆弧形金刚石砂轮进行等包络迹高度的数控成形磨削新方法。首先,建立等包络迹高度的行走路径计算方法,然后,分析等包络迹高度与曲面光滑平整成形的关系,最后,对分布在成形磨削表面的面形误差和表面粗糙度进行检测和评价。试验结果表明,减小等包络迹高度可以实现自由曲面的连续光顺性加工。在自由曲面上的非接触激光扫描检测结果显示,面形误差小于200μm。此外,在加工高速钢模芯时,表面粗糙度Ra可以达到50nm以下。
Due to difficulty of precision machining of free-form surfaces of injection mould, a new form grinding was proposed by using equal-envelope-height. First, the algorithm of tool path for equal-envelope-height was established, and then the relationship between equal-envelope- height and ground surface smoothness was investigated, finally, 3D form error and surface roughness distributed on the form ground surfaces were measured and evaluated. Experimental results show that the smooth ground free-form surface can be formed with decreasing equal-envelope-height. The measurement results by non-contact laser meter display that form error is less than 200μm. In addition, the ground surface roughness of HSS mould core is less than 50nm.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2006年第19期2076-2079,共4页
China Mechanical Engineering
基金
国家自然科学基金资助重点项目(50436010)
教育部留学回国人员科研启动基金资助项目
广东省自然科学基金博士启动基金资助项目(05300140)
关键词
自由曲面
金刚石砂轮
数控磨削
面形误差
表面粗糙度
free-form surface
diamond grinding wheel
CNC grinding
form accuracy
surface roughness
