How to analyze the molding machine material situation

1. How to solve the problem of material not matching the roller size ?

The material is super wide, and the size of the rollers design does not match. When rolling, the material is stuck in the concave wheel and can not be stretched out, resulting in stacked material. The material width should be tested in time, and its pickup width tolerance under the deviation value.

2. How to solve the problem of thinning material when rollers are pressed too tightly ?

Material thins out and extends to the sides, jamming on both sides of the concave wheel. This causes a build-up of material during operation. In this case, stop the machine immediately. If the material is stacked too thick, it will cause the roller to burst and the roller shaft to break.The adjuster should properly relax the pressure screw of the upper wheel.

3. How to solve the problem of side bending of material ?

The coil out of the roller, will be bent to the left or right, customarily known as side bending.Improperly adjust the gap between the upper and lower wheels on the left and right, timely adjustment.

4. How to solve the problem of the sample bending to the left ?

Appropriately relax the adjusting screw on the right side of the upper wheel, or slightly press the adjusting screw on the left side of the upper wheel.

5. How to solve the problem of the sample bending to the right ?

Loosen the adjusting screw on the left side of the upper wheel appropriately or press the adjusting screw on the right side of the upper wheel slightly.

6. How to deal with the appearance of bending to the left or right in the last part ?

To observe the shape of the cross section of the product. Judge whether the product side plate is consistent with the drawing requirements. Depending on the situation, adjust the side wheels. Observe the online rolling change condition in turn, and adjust the height of both sides of its upper wheel axle. Try to make the gap between the upper and lower wheels for the thickness of the raw material, or slightly less than the thickness of the raw material. Reasonable and correct adjustment can extend the service life of rollers, roller shafts, bearings, etc. of the roller mill.

7. How to solve the problem of scratches on the product ?

Rolling mold inserts over the gap in the material groove, generally within 0.15mm. The mold is not installed correctly, it will lead to product scratching. Note whether the gap is accurate.

The mechanical properties of each batch of material are not exactly the same. Even if the debugging technology is relatively high, when the coil is rolled to the last set or groups of rollers, there will always be more or less bending.

Note: Adjust the clearance of the parallelism of the upper and lower rollers, the center bisector of the working surface of the rollers is required to be in a straight line, and perpendicular to the line between the center of the upper and lower axes of each group of rollers. So adjusting the roller mill is to adjust the level and verticality of the roller mill rollers, so that the roller mill rollers as far as possible to maintain the level and verticality. To do everything possible to achieve this purpose.

Keywords: roll forming machine

Originally published 23 Aug 2024, updated 23 Aug 2024.