A bending machine is a common metal processing equipment used to bend metal sheets into the desired shapes. The upper and lower dies in the bending machine are crucial components that determine the quality of the processing. Setting the upper and lower dies correctly can significantly improve the bending quality and reduce processing difficulty. This article will introduce the method of setting the upper and lower dies of a bending machine.
Basic Structure of Upper and Lower Dies
The upper and lower dies of a bending machine consist of upper and lower molds and wedges. The main part of the upper die is a horizontal beam with a protrusion fixed inside the beam and a corresponding groove. When the lower die moves, the metal sheet is clamped between the protrusion and the groove to ensure the accuracy and quality of the bending. The lower die is V-shaped with a rotatable inner surface. The smaller the angle of the lower die, the greater the bending angle.
Methods of Setting the Upper and Lower Dies
When processing metal sheets with a bending machine, different materials and thicknesses require different settings for the upper and lower dies. Below are three commonly used setting methods.
Setting Protrusion Height
Place the upper die at any position and then insert a part that raises the upper die by 10mm between the upper and lower dies. Gradually reduce the gap between them until the part can be clamped without applying pressure. Adjust the height of the protrusion to ensure that it can clamp the part without affecting the processing quality. This method is suitable for processing thinner metal sheets.
Setting Lower Die Angle
Rotate the lower die to the desired angle, leaving a small angle to ensure the accuracy of the bending angle. When adjusting the angle of the lower die, it is necessary to calibrate it before each processing operation.
Setting Upper and Lower Die Distance
When setting the distance between the upper and lower dies, consider the material thickness and the strength of the sheet to ensure that clamping does not exert pressure on the metal sheet. A greater distance results in a smaller bending angle of the metal sheet being processed, and vice versa. Therefore, adjustments should be made based on different metal sheets and processing requirements. Additionally, the bending curvature can be controlled by the depth of the lower die.
Correctly setting the upper and lower dies of a bending machine can significantly improve bending quality and reduce processing difficulty. The required setting methods should be adjusted according to different materials and processing requirements.
