摘要
为提高零件的加工精度,提出了基于公差的局部误差补偿法,并通过修正数控程序主动补偿加工误差。分析零件加工表面误差的特点,根据实际公差要求找出超出公差范围的变形关键区域,修正其切削深度以实现误差的局部补偿。得到刀位控制点修正的切深后,重新规划带有误差补偿值的刀具轨迹。结合实际加工精度确定走刀步距和行距,经过后置处理生成零件修正的数控代码。通过实例验证了上述方法的可行性。
To improve machining accuracy of workpieces,a local error compensation method based on tolerance was proposed. And the machining errors were compensated actively by modifying Numerical Control（NC） codes. Error values of parts surface were analyzed,and according to tolerance requirements,the critical deflection areas beyond tolerance range were obtained,and actual cutting depth of the areas was amended to compensate local errors. Tool path with error compensated values was re-planned when actually modified cutting depth was decided. And then step and row spacing were determined according to actual machining accuracy. By post-processing,modified NC codes were achieved for workpiece machining. An example was used to demonstrate the feasibility of this approach.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2010年第9期1902-1907,共6页
Computer Integrated Manufacturing Systems
基金
总装备部预研基金资助项目(51318020202)~~
关键词
误差补偿
数控编程
数控加工
薄壁零件
error compensation
numerical control programming
numerical control machining
thin-walled parts
