摘要
误差建模和调整技术是提高产品质量的有效方法。在加工系统中,由夹具、刀具、夹紧力等引入的随机误差或系统误差都会引起工件的位姿误差。如何减少工件的位姿误差来提高产品的加工质量已成为一个重要的技术难题。为了提高工件的加工精度,本文提出一种基于工程过程控制的夹具-工件系统综合误差调整模型。在获得加工特征综合误差模型的基础上,利用等效误差的概念,建立加工特征综合误差调整模型,并针对3-2-1定位方式给出了调整模型的参数识别方法,利用工程过程控制技术调整夹具定位销的长度来补偿加工过程中随机误差或系统误差导致的加工特征误差,提高产品加工精度。最后用实验验证了该调整模型的有效性。
In order to improve the machining precision of workpiece, a comprehensive error （FWSCE） adjustment model for fixture-workpiece system based on engineering process control （EPC） has been put forward in the text. On the basis of acquiring comprehensive error model of machining feature, the concept of equivalent error has been adopted to build the adjustment model. The adjusting model parameter identification method has been given out aiming at the 3-2-1 positioning mode. By use of EPC technology, the length of the fixture locating pins has been adjusted to compensate for the machining feature error caused by random errors or systematic errors in the process, which improves the product machining precision. Finally, the adjusting model has been verified via experiment.
出处
《锻压装备与制造技术》
2013年第3期99-103,共5页
China Metalforming Equipment & Manufacturing Technology
基金
广东省教育厅产学研项目(B090300060)
关键词
误差调整
夹具-工件系统
位姿误差
工程过程控制
加工精度
Fixture-workpiece system
Pose error
Engineering process control （EPC）
Errors adjustment
Machining precision
