Paper machine universal joint pin break caused by improper operation

1. Cause analysis

The paper stack lifting is completed by the paper stack lifting mechanism. During the operation, the paper stack is raised to the final paper feeding position by the micro-lifting mechanism after the paper stack reaches a certain position. In the process of paper feeding and printing , the electro-magnet of the micro-lifting mechanism must repeatedly repeat the power-on and pull-off and power-off free-falling actions. When the action is frequent, the connecting rod is stuck, and the core is dropped, so that the iron core cannot be lowered to the limit switch. At this time, if the operator presses the limit switch button under the electromagnet of the micro-lift mechanism, the rotation direction of the ratchet and the pawl is in conflict with the rotation direction of the ratchet which is rapidly descending, which causes the load of the paper feeder to be intensified, so that the universal direction Somewhere on the shaft, the connecting pin is broken.

2. Solution

Move the electromagnet core to drive the connecting rod to the limit switch, stop and check the cause.

At present, the micro-lift mechanism of the paper stacker has been improved accordingly, and the micro-lift mechanism of the paper stack has been eliminated. The two-speed motor is used to realize the rapid lifting and micro-lifting of the paper stack, which reduces the failure of the paper feeder. The rate has greatly improved the efficiency of the paper feeder.