Conical can bodies after roll forming

Conical can bodies after roll forming

Cause

• Both supporting bearing underneath lower rollformer roller are broken. Take off the roller, and check each bearing, if needed exchange them with new ones.
   
• The shaft clearance and/or pressure of the last roll former roller pair (bending station) is not correct.

Remedy:

1. Open the rollformer completely, close and lock it.
2. Check whether the lifting motor has enough play after the rollformer is locked or not.
   • If not, the motor may have a wrong internal micro switch setting.
3. Make sure the rollformer is locked.
4. Completely unload the springs on both sides till each spring has an axial play.
5. To ensure that the roller is easily moving up and down, lift up each end of the roller by hand.
   • Belt tension inside does not effect conical roll forming!
6. Reset roller clearance to 0.1mm by feeler gauge.
   • Check the clearance with two gauges on the very left, and on the very right end of the roller!
7. Turn both springs clockwise till each screw touches the spring.
8. Load each spring by 2.5 revolutions.
9. Reset roller clearance to 0.05 – 0.10 mm
   • Check with two gauges on the very left, as well as the very right end of the shaft. After that you should be able to get a proper roll formed body, with an overlap of 5 mm.