In this paper, eddy current sensors and thermocouple sensors were employed to measure the thermal field and thermal deformation of a spindle of a telescopic CNC boring-milling machine tool, respectively. A linear regr...In this paper, eddy current sensors and thermocouple sensors were employed to measure the thermal field and thermal deformation of a spindle of a telescopic CNC boring-milling machine tool, respectively. A linear regression method was proposed to establish the thermal error model. Furthermore, two compensation methods were implemented based on the SIEMENS 840D system by using the feed shaft of z direction and telescopic spindle respectively. Experimental results showed that the thermal error could be reduced by 73.79% when using the second compensation method, and the thermal error could be eliminated by using the two compensation methods effectively.展开更多
文摘In this paper, eddy current sensors and thermocouple sensors were employed to measure the thermal field and thermal deformation of a spindle of a telescopic CNC boring-milling machine tool, respectively. A linear regression method was proposed to establish the thermal error model. Furthermore, two compensation methods were implemented based on the SIEMENS 840D system by using the feed shaft of z direction and telescopic spindle respectively. Experimental results showed that the thermal error could be reduced by 73.79% when using the second compensation method, and the thermal error could be eliminated by using the two compensation methods effectively.
文摘CNC机床在加工零件的过程中,轴的运动轨迹是由数控系统的插补功能完成的。随着CNC的不断完善和发展,其中的渐开线插补应用场合越来越广泛。SIEMENS 840D数控系统的渐开线插补功能强大,种类多,可以解决生产中的很多问题,因此得到了越来越广泛的应用。文章首先介绍了西门子SINU-MER IK 840D的渐开线插补指令,在此基础上通过一个工程实例-电缆弯制过程并结合Matlab的计算功能研究、展示了SIEMENS 840D渐开线插补功能。
