The press brake machine is the important equipment for bending and forming workpieces in the sheet metal processing, which can bend the sheet metal to different shapes according to customer’s requests.
After long-term use of the press brake machine, machine problems are inevitable. Below are the problems and solutions encountered in the bending process.
Problem 1: The bending edge is not straight, the size is unstable
Problem 2: The outer surface of the workpiece is scratched after bending
Problem 3: There are cracks in the bending angles
Problem 4: Bending causes holes deformation
Press brake machine adopt elastic bending, and locate by the holes position. The outer side of the bending arm is pulled due to the friction between the surface of the bottom die and the outer surface of the workpiece, so that the positioning hole is deformed.
Problem 5: The curved material surfaces to be thin
Problem 6: The end face of the workpiece is bulging or uneven
When bending, the outer surface of the material is stretched in the circumferential direction to produce shrinkage deformation, the inner surface is compressed in the circumferential direction to produce elongation deformation, so the end face of the workpiece bulges along the bending direction.
Problem 7: The bottom of the concave part is not flat
Problem 8: The axes of the two opposite holes on both sides are displaced after bending
The bent material springs back, which changes the bending angle, and shifts the centerline.
Problem 9: The position size and accuracy of the hole can not be guaranteed after bending
Problem 10: The bending line is not parallel to the connection between the center of the two holes
When the bending height is less than the minimum bending limit height, the bending part will swell.
Problem 11: After bending, the width direction of the bending part is deformed, and in the width direction the bent part has bow-shaped deflection
Because of the workpiece inconsistent drawing and shrinkage in the width direction, the bending part caused to torsion and deflection.
Problem 12: The bending part with notches, has a downwards direction deflection
The notches makes the two straight sides open to the left and right, and the bottom of the workpiece has a deflection.