Poor lubrication of the bending machine may cause the sheet

Release time：2021-03-25 13:34 Pageviews：

Improve lubrication conditions

The relationship between the stamping quality of the press brake and the lubricant is extremely important. Poor lubrication conditions or improper selection of lubricants may cause sheet cracks.

Adjust drawbead parameters or blank holder force

The use of drawbeads can certainly prevent wrinkles in the flange part, but its side effect is to increase the resistance of the material to enter the die. Therefore, inappropriate drawbead parameters may cause excessive resistance of the bending machine, causing the sheet to be stretched. crack.

Add auxiliary processes

Under the condition of meeting the functional requirements of the parts, appropriately increasing the mold fillet or reducing the inclination can reduce the movement resistance of the material during the forming process, so as to avoid rupture. The macroscopic rupture of the bending machine is usually mainly caused by the excessive swelling in the plane of the sheet, and the microscopic rupture can be caused by pure swelling or simple bending. Whether it is a microscopic or a macroscopic rupture, it is due to the material in the final analysis. Caused by excessive local tensile strain. Microscopic cracks refer to cracks that are difficult to see with the naked eye in the sheet. Although the crack depth is very shallow, a part of the material has failed.