The occurrence and overcoming of five-layer flat-rolled defective products in steel drums (3)

The occurrence and overcoming of five-layer flat-rolled defective products in steel drums (3)

Sixth, the barrel can not be hooked (Figure 6)
The reasons for this problem and how to overcome it are as follows:
1. The distance between the two rolls of the horizontal sealing machine exceeds the specified value.
Due to improper commissioning, when the distance between the two rolls is more than the specified value, the size of the finished barrel will be too high. The super high is one of the reasons why the barrel flange can not be hooked, so the disc size should be checked before the shift. In the production process of steel drums, the height of the finished barrel should also be frequently checked, and the equipment should be adjusted in time to find problems.
2. The cylinder pressure is insufficient.
Regardless of the vertical or horizontal pneumatic sealing machine, when the pressure of the air pressure is insufficient, the size of the finished barrel can be extremely high, so it should be avoided to drive the car when the air pressure is insufficient.
3. The barrel is not evenly flanged.
When the flange of the barrel is not regular, especially the size of one full turn is large, and the size of the whole turn is small. When the size of the flange is small after the seal, the problem of the whole circle can not be seen, so it should be strictly controlled. The process size of the flanging process.
Seven, the bottom edge or the cover edge can not hook the head (Figure 7)
The causes of the problem and how to overcome it are as follows:
1. The arc of the sealing wheel is worn.
After the sealing wheel is used for a long time, the curved surface becomes wide due to wear. If it continues to be used, the front end of the boring side of the bottom cover of the barrel can no longer be hooked forward, and the flattening wheel flattens the curling edge and rolls. There is no problem in the layer. The new wheel should be replaced at this time.
2. The sealing roller adjusts the screw to move backward.
Compared with the old sealing machine, the mechanical screw can cause the adjusting screw to retreat, and the sealing wheel can not forcefully curl the steel barrel, that is, the bottom cover is not hooked. At this point, the equipment should be improved to increase the screw lock nut retaining device.
3. After the barrel bottom cover is stamped, it is not round due to missing corners.
The bottom cover produced by the stamping workshop makes the stuffy side lacking angle for some reason, so after the sealing, the corner part cannot be hooked to the head. To ensure the quality of the semi-finished products, it is found that the undercut bottom cover does not allow it to enter the assembly process, which can avoid this problem.

Eight, the inner volume of five and a half (Figure 8).
The causes and ways to overcome are as follows:
1. The barrel height is too short.
When the distance between the two sealing discs of the horizontal sealing machine is less than the specified value, the size of the flange of the barrel can be forced to widen, and a five-layer problem occurs in the coil layer. Solution: Debug the equipment and drive production.
2. The cylinder pressure is too large.
Multi-variety production. The cylinder pressure on the vertical pneumatic sealing machine should be increased or decreased as the material used is thin. When the gas consumption of a certain type of barrel exceeds the specified value, the inner roll can be five and a half layers, so care should be taken to adjust the air pressure. When changing the type, it is more important to adjust the cylinder pressure.
3. The barrel is not well turned.
The correctness of the flange of the barrel has a great influence on the quality of the curling edge, especially the rolling and crimping machine. Excessively due to improper adjustment, the size of the flange of the barrel is wide and narrow. After the sealing, there are five layers and half defects at the end of the width, so the size of the flanging process must be correct. (See Figure 8)