The operator of cnc pipe end forming machines automatic needs to pass the training of safe operation procedures, familiar with the structure, performance, principle, daily maintenance and programming of the machine, and can operate after passing the assessment. Then how to reduce the rebound of the bending machine mold? Table and mechanical experts said that after the end of bending, the punch and the die are separated, the workpiece is not subject to external force, due to the existence of elastic recovery, the curvature radius and bending Angle of the bending part of the bending part change after the bending external force is removed. The specific measures are as follows:

1, using corrected bending instead of free bending, increasing bending force and heating bending.

2, for the bending parts of general materials, it can increase the pressing force or reduce the gap between the convex and concave dies to reduce the rebound.

3. The selection of materials with large elastic modulus, small yield and stable mechanical properties can also reduce the rebound of bending parts.

4, improve the parts design in the deformation area design reinforcement or forming side wings, increase the rigidity of the bending parts and the deformation degree of the forming side wings.

5, the punch can be made into the shape shown, reduce the contact area between the punch and the workpiece, so that the pressure is concentrated in the bending deformation area, and increase the deformation degree of the deformation area.

6. V-shaped bending can subtract a rebound Angle from the punch, and U-shaped bending can make the punch wall equal to the slope Angle of the rebound Angle or make the top surface of the punch into a camber to compensate for the rebound on both sides.

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