冷弯成形轧辊快换机组设计

针对更换轧辊过程中存在劳动强度大、效率及调节精度低等问题,课题组设计了一种冷弯成形轧辊快换机组。该机组采用PLC作为系统控制器,结合传感器检测信号与人机交互界面指令信号设计了轧辊位置自动调节系统,通过控制伺服电机驱动左轮转盘装置旋转来实现换辊过程,并利用槽销连接实现装置周向固定;利用伺服电机驱动蜗轮减速器运动,进而使得丝杠带动左轮转盘装置上下移动产生位移;采用限位开关标定转盘零点位置,通过位移传感器监控轧辊移动距离并构成闭环控制系统,从而精确调节轧辊间距;对机组关键部分进行了选型与有限元强度校核。结果表明：该机组能显著提高换辊精度及效率,提高自动化水平。该机组能完成6种规格轧辊的自动更换过程及辊缝精确调节,为冷弯成形机组的设计与改进提供了新的思路。

Design of Roll Quick Changing Unit for Cold Bending Forming

Aiming at the problems of high labor intensity, low efficiency and low adjustment accuracy in the process of roll replacement, a cold bending forming roll quick changing unit was designed. The roll position automatic adjustment system was designed by adopting PLC as the system controller, combining the sensor detection signal and human machine interaction interface command signal. The roll changing process was realized by controlling the servo motor to drive the rotation of the left wheel device, and the slot pin connection was used to realize the device circumferential fixation. The servo motor was used to drive the worm gear reducer, and the displacement of the lead screw driven left wheel turntable device to move up and down was achieved. A limit switch was used to calibrate the zero position of the turntable, and a closed loop control system was constructed to monitor the roll moving distance through a displacement sensor, so as to accurately adjust the distance between rolls. The key parts of the unit were selected and the finite element strength was checked. The results show that the unit can significantly improve the precision and efficiency of roll change and improve the level of automation. The machine can complete the automatic change process of six kinds of rolls and the precise adjustment of roll gap, and provides a new idea for the design and improvement of cold forming machine.