Analysis of common mechanical faults of the hottes

2022-10-13
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Analysis of common mechanical faults of single concave machine (III)

v. analysis of typical examples of mechanical faults

(I) high noise of paper feeder motor

1. The motor is not firmly wired or falsely connected, and the motor produces noise due to phase failure of power supply. Wiring should be checked

2. The friction force between the friction blocks is uneven. Three pressure springs should be adjusted to make the pressure on the contact surface of the friction block uniform

3. replace the brake coil if it is burnt out

4. the main drive shaft does not rotate flexibly, which makes the load of the main motor too large. Check whether the shaft sleeve is worn out, whether the main shaft is deformed, whether the drive chain has dead joints, etc

see Figure 8

(II) the main paper stack has a little time limit, and there is no inching rise.

1. If the change-over switch does not reset, check and clean the inside of the change-over switch, so that (6) the sensor indication can be cleared freely

when the paper stack rises, the paper stack surface moves the probe and moves it up, touches the change-over switch and switches to automatic rise. When it rises to the specified height, the paper feeding table will automatically stop rising. At this time, the air pump works to form a vacuum in the cavity of the valve body, and the vacuum sucks up the piston and the probe, so that there is a certain distance between the probe and the paper stack surface, which is convenient for conveying paper. When the air pump stops running, there is no vacuum in the pipeline. Under the action of its weight, the probe automatically increases its mechanical property through appropriate heat treatment process, and can drop. When the paper pile drops, the probe returns to its original position

see Figure 9 and figure 10

2. If the protection switch of the flying dagger is not reset, adjust the protection switch to make it in the normal position

when the paper stack rises, in order to prevent the separation head from being damaged due to the failure of the height limit of the paper stack, the lifting motor of the paper stack table is generally powered off and stopped by electrical signals, so as to achieve the purpose of stopping the paper stack table from moving up

see Figure 11

(III) the ink channeling knife vibrates during operation

1. The sliding shaft and wallboard hole have no lubricating oil for a long time, and the ink channeling knife vibrates during operation due to dirt and grinding damage on the shaft and hole. Remove the sliding shaft, clean the shaft hole, polish the sliding shaft and add lubricating oil to make the shaft and hole move freely

2. the support shaft of the cutter body should be straightened if it is bent and deformed

see Figure 12

(IV) irregular paper receiving

1. There are tears and wrinkles in the process of paper handover and transmission, so it is necessary to check whether there are dead teeth in the paper receiving teeth, lazy teeth and teeth that cannot hold the paper firmly. Adjust the teeth to make them flexible, and lubricate them with oil at the tooth hoop. Adjust the teeth and tooth pads to make the paper be held firmly. Adjust the junction point between the paper receiving teeth and the embossing teeth to make the paper handover smoothly

see figures 13 and 14

2. The paper blocking time of the automatic lowering switch on the side leveler should be adjusted to the middle to avoid the paper blocking of the automatic lowering switch during the paper lowering process

see Figure 15

(V) there is paper loss during the paper receiving process

1. if the paper receiving tooth row is not firm in holding the paper, the teeth biting force of the tooth row should be adjusted to make the teeth hold the paper firmly

see Figure 16

2. The paper in the paper receiving toothed row is too small. The paper in the toothed row should be adjusted to not less than 3m. Fine sorting must be carried out before processing M

see Figure 17

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