摘要
基于多体系统理论,建立了数控加工中心热误差模型,并提出其误差补偿方法。以三坐标MAKINO加工中心为例,建立了具体模型并进行参数辨识。优选了4个测温点,实时测量其温度,作为误差参数辨识模型的输入值,实现了软件实时补偿。在该加工中心上分别沿3个坐标方向加工一系列表面并比较加入热误差补偿的结果,测量结果表明补偿效果显著。实践说明所建热误差模型的有效性和补偿方法的可行性。
Based on MBS (Multi-body system), an error model is presented here for the thermal errors in machining centers as well as the related compensation method. Taking three-axis MAKINO machining center as an example, a specific error model is set up through theoretically analyzing and experimentally parameter-identifying. Four temperature sensors are selected after optimization, and the temperature changes from their readings offered as the inputs to the error parameter models. Then a real-time software compensation is carried out, a set of small surfaces are cut on the machining center along the x, y and z-axis with and without error compensation. The measurement results from CMM show an obvious improvement is obtained after the real-time compensation. Thus the facts above verified the validity and feasibility of this error model and compensation method.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2002年第1期127-130,共4页
Journal of Mechanical Engineering
基金
国家'九五'攀登计划预选项目(PD9521910)
关键词
多体系统理论
加工中心
热误差
误差补偿
Multi-body system theory Machining center Thermal error Compensation technique