摘要
针对原有进给速度误差补偿方法补偿值计算精度较低造成补偿结果二次误差的问题,设计曲面5轴数控加工进给速度误差自动补偿方法。根据多体系统构建机床坐标系并得出相应的相邻组件运动关联程度。通过相邻组件运动关联程度得出机床刀具运动变换矩阵,结合刀具位置矢量构建进给速度误差模型。对误差模型中的数值加以测量,以国际误差标准为基础制定进给速度补偿标准。在机床数控系统中引用自动补偿器完成误差补偿工作。至此,曲面5轴数控加工进给速度误差自动补偿方法设计完成。构建对比实验,与原有补偿方法相比,采用此方法后,工件的入刀深度与实验设定深度一致;采用原有方法后,与实验设定深度仍有误差存在。通过计算可知,此方法补偿精度高于原有方法20%。因此,此方法更为有效。
Aiming at the problem of quadric error caused by the low calculation accuracy of the original feed speed error compensation method,the automatic compensation method of feed speed error in 5-axis CNC machining of curved surface is designed.The machine tool coordinate system is constructed according to the multi-body system and the corresponding motion correlation degree of adjacent components is obtained.Through the degree of motion correlation between adjacent components,the tool motion transformation matrix is obtained,and the feed velocity error model is constructed by combining the tool position vector.The values in the error model are measured and the compensation standard of feed speed is established based on the international error standard.In the machine tool numerical control system,the automatic compensator is used to complete the error compensation.Thus,the design of automatic compensation method for feed speed error of 5 axis CNC machining of curved surface is completed.Compared with the original compensation method,the cutting depth of the workpiece is consistent with the set depth of the experiment.After using the original method,there is still some error with the set depth of the experiment.Through calculation,the compensation accuracy of this method is 20% higher than that of the original method.Therefore,this method is more effective.
作者
宋育红
SONG Yuhong(Xi'an Aeronautical Polytechnic Institute,Xi'an 710089,China)
出处
《自动化与仪器仪表》
2020年第7期120-123,共4页
Automation & Instrumentation
基金
西安航空职业技术学院教改课题:产教融合背景下杰出五轴应用技术技能人才培养的研究与实践(No.18XHJG-012)
中国职业技术教育学会教改课题:校企深度融合下共育五轴高端技能人才的研究与培养(No.1910601)。
关键词
误差建模
误差识别
五轴数控加工
进给速度
error modeling
error identification
five-axis CNC machining
feed rate
