特种复合加工中心盘式刀库自动换刀控制系统研究

Research on the Disc-tool Changer Automatic Tool Change Control System for the Special Compound Machining Center

针对自主开发的龙门式双主轴钣金刻铣与激光切割复合加工中心的顺序动作控制复杂、控制点数多且目前没有控制该特种复合加工中心的数控系统问题,提出采用自由口通讯方式实现多轴运动控制器与外挂独立型通用PLC的通信和控制,进而实现对复合加工中心的顺序动作控制以及盘式刀库自动换刀功能。对带有机械手的圆盘式刀库研究采用随机地址最优路径选刀方法,在该复合加工中心平台上实现自动化换刀功能。实验结果表明基于外挂独立型通用PLC的自由口通讯控制方式下的最优路径选刀方法可以缩短换刀时间,提高加工效率。

The self-developed gantry twin-spindle sheet and laser cutting compound machining center has complex sequence action control and abundance of I/O control points. Thus it need a special Computer Numerical Control （CNC） system to control this compound machining center. A free port communication mode was proposed to implement communication and control between the multi-axis motion controller and the general independence PLC. Then it can realize the sequential action control and automatic tool change （ATC） function. The random address optimal path tool selection method was researched to realize ATC on the compound machining center by analyzing the disc-tool changer with manipulator. Experimental results showed that the tool change time can be reduced and the efficiency of processing was improved via the optimal path tool selection method under the free port communication mode and controlled by the independence PLC.