08,05-type printing press power feeding portions are connected to the host through the universal joint is achieved. In the universal joint of the universal joint, the 5mm shaft pin is used for fixing. When the paper feeder parts are faulty and the load is increased, the universal joint for transmitting power is not damaged in order to prevent the related parts and the main machine from being damaged. The shaft pin will be cut off first, thus providing a certain protection to the main unit and its paper feeder. After years of practical experience, the author summarizes the following reasons that cause the universal twist pin of the paper machine to break frequently.
Improper operation of the paper stack lifting mechanism
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.
Wanxiang coupling parts lack of oil
1. Cause analysis
Depending on the paper size and format, the paper feed speed will often change the relative position of the paper feeder. The angle between the feeder shaft and the paper feeder shaft will also change frequently. The angle of the two single universal joints of the universal joint changes greatly, almost on the same line as the middle shaft, the drive shaft and the driven shaft. If the angle is larger, the friction angle of the universal joint is larger during the movement. In the absence of lubricating oil, the wear of the two single universal joints is easily aggravated, and in severe cases, the wear is caused. If it is not found in time, it will cause the universal joint to be stuck during the movement, and the universal coupling shaft pin will be cut due to the resistance, thus affecting the normal movement of the paper feed and the normal operation of the paper feeder. jobs.
2. Solution
Lubricating oil should be added regularly to the universal joint during routine maintenance. In order to prevent the paper ash, paper wool and dust from sticking to it and affecting the lubrication effect, a rubber protection ring can also be designed on the outer ring, so that after the lubricating oil is added, the universal joint can be covered with the rubber protection ring.
Paper feed fly nozzle gas valve burned
When the paper feed nozzle is burnt, it will also cause the universal joint shaft pin to break. After replacing the broken shaft pin, do not rush to start the work, you should find out the cause of the break. When disassembling the universal coupling of the paper machine, the marking of the universal joint should be made to prevent the angle from changing during the reinstallation, so that the relative position of the paper feed to the other parts of the paper machine changes. , causing out of sync.
1. Main engine and paper machine universal coupling shaft pin break
If the universal joint pin between the main unit and the paper machine is broken, check the loader of the paper feeder. During the inspection, the paper feeder wheel can be driven to check the load of the paper feeder. If the paper loader is large, you must find the reason for the paper feeder. During the inspection, if the paper feeder and the Feida universal coupling are disengaged, the handwheel is turned and the load is normal, indicating that the load comes from the paper feed, and the paper feed can be judged to be burnt.
2. Paper machine and paper feeder Feida transmission universal coupling shaft pin break
If the universal joint shaft pin between the paper feeder and the paper feed is broken, it is mostly caused by the burning of the paper feed nozzle. In order to reduce the failure rate of the paper feed in the work, we should pay attention to the maintenance and cleaning of the paper feed, regularly add lubricant to the paper feed parts, and regularly clean the paper feed nozzle valve to keep the gas. The valve is clean.
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