In the original manufacturing of medium-sized steel drums, raw material steel plates with a thickness of 1.0mm may be commonly used, but after the thickness is changed to heavy-duty steel drums with a thickness of 1.5mm, various welding parameters of the corresponding seam welder shall be adjusted accordingly to adapt to the welding of steel plates with this thickness.
The leakage of barrel body weld is mainly caused by the mismatching of welding parameters (such as current, voltage, pressure, welding speed, etc.) of the butt-welding machine during welding, resulting in false welding or false welding. The leakage of barrel body weld is caused because the welding is not firm and sealed. To solve such problems, the operator is required to understand and master the operating procedures of welding machine equipment, understand certain basic knowledge of welding process, and understand the relationship between welding parameters. Generally, when raw materials with the same specification and thickness are used, the pressure value is relatively stable. However, when the grid voltage is high, the welding current should be reduced accordingly. Otherwise, vice versa. Welding speed is also a very key parameter. We can't blindly pursue high speed. When the current and voltage are relatively stable, if you want to improve the welding speed, the current should also be increased accordingly.
2. Leakage of barrel bottom and top crimping
For the heavy-duty barrel producing 1.5mm thick materials, the crimping and sealing roller for the original medium-sized barrel producing 1.0mm thick cannot be used in general. If you still use the original sealing roller to produce heavy barrels, you should replace the sealing roller suitable for the material thickness of heavy barrels as soon as possible.
2.1 Groove type problem of winding roller
Check whether the groove type of the roller of the coiling machine is appropriate. Cut the edge (crimping) of the steel drum after coiling with a manual saw to check the crimping. Because the roller groove type is different from manufacturer to manufacturer, the crimping condition of the steel drum sealed is also different. Some manufacturers have less than six crimping layers after crimping, but as long as the roll is solid, it will not leak. Of course, the better crimping quality can be more than six and a half layers (that is, what we usually call seven layers of crimping), but it must be rolled. If there are two gaps in it, there may be a problem with the roller groove.
2.2 Adjustment of crimping roller
The leakage of the roll seal is directly related to the adjustment of the roller. Generally, the clearance between the roller and the sealing pressure plate of the sealing machine is 0.5mm. If the gap is too large, it is not easy to feed and seal, and it is difficult to form a self winding pattern, so the winding is not solid. It is also easy to cause sharp edges and corners of the steel drum. In serious cases, it will squeeze the edge of the steel drum, and even "hold" the steel drum on the sealing pressure plate, resulting in leakage or scrapping of the steel drum. However, the clearance should not be too small, otherwise the roller will rub hard with the pressure plate steel ring, which will damage the equipment and tooling.
2.3 Thickness problem of sealing pressure plate
Improper thickness of the sealing pressure plate will also cause crimping leakage. Generally, the thickness of the winding disk is 0.5 ~ 1.0mm greater than the stretching depth of the barrel cover. If the thickness is too large, it is easy to cause stretching at the bottom and top of the barrel after sealing, which will affect the appearance quality of the steel barrel, and the number of crimping layers will be less than seven due to insufficient materials, which will also produce leakage. If the size is too small, there will be a barb phenomenon that will squeeze the steel barrel material into the sealing pressure plate during sealing, which will affect the loading and unloading of the steel barrel on the sealing machine. In serious cases, the barb will be crushed, the steel barrel will leak or even "hold" on the sealing plate, resulting in the scrapping of the steel barrel.
Short comments: Leakage problems can frequently happen especially in the drum industry, which may also cause the concern of drum sealing industries such as drum closure producers. Awareness and measures to prevention should both be strengthened.
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