1. The top roll can move vertically as well as horizontally.
2. With end pre-bending is finished with high precision by moving the top roll and making it unsymmetrical position with two bottom rolls.
3. Two bottom rolls are driven by the motor and decelerator for rolling the plate.
4. It is controlled by PLC, and the positioning of the rolls is digital readout.
5. The top roll is in the shape of drum, accompany of the support rolls of two bottom rolls for up & down adjustment, it can get the high precision for deviation from straightness of the finished products.
6. Top roll tilts up for taking out the finishing products.
7. It adopts the rear rolling to gain the high precision for the circularity of the finished products.
8. It can decrease the unfitness of butt joint of the finished products.