Eliminate the press brake bending indentation
In general, how to eliminate the residual indentation and scratches after the bending process. The common method is to use polyurethane gaskets, plastic lower molds, or anti-indentation films. Then for the press brake mold work, you can choose an alternative way to improve the mold. Simply said, increase the R dimension of the rhomboid on lower mold both sides V-notch. It will ensure the upper mold bending smoothness. It will greatly reduce the friction, which can effectively solve the problem of bending indentation.
Besides, there is a utility model metal plate bending mold, which is characterized in that it is located at the upper part of the left and right slopes of the V-shaped notch of the lower mold. It is symmetrically on the lower mold according to the length direction of the press brake lower mold. A horizontal forming through slot is opened. The cross-section of this forming through slot is an approximately circular bar, which is called a mandrel. Its material can be bearing steel or cemented carbide, and the molding inserts are correspondingly embedded in each forming through a slot, so that the cross-section of the molding inserts is processed into a circle or a rectangle accordingly.
The lower die is assembled into one body, and the partially formed insert is exposed at the notch of the forming through a slot. It is higher than the left and right slopes of the V-shaped slot. During the bending process of the metal sheet material by the press brake die. The bending surface of the metal sheet will move smoothly along the exposed surface of the molding insert and gradually compress the deformation of the molding insert. The bending surface of the metal sheet metal does not directly contact the metal part of the lower mold. Thereby reaching the metal sheet. The purpose of the bending surface without indentation.
No Indentation Mold
Position the bending side length before bending. The V-shaped groove for the thin metal sheet can be used to pre-position the length of the bent side before bending, and then pre-scored on the press brake according to the V. The shape line groove is bent, so that the length of the bending edge can be ensured to be correct, and the back-gauge function of the CNC press brake can be replaced.
During the downward bending of the metal sheet by the mold on the press brake, the bending profile of the sheet metal will move smoothly along the exposed profile of the molding insert and gradually compress the deformation of the molding insert. The bending of the metal sheet metal profile does not directly connect the lower die metal part. To achieve the goal of no indentation of the bending profile of the metal sheet. The metal sheet metal is greatly advanced for the quality and completeness of the bending product.