Indentation-free bending machine lower mold with adjustable opening

Abstract

The invention belongs to the bending process field of sheet metal parts, and specifically relates to an indentation-free bending machine lower mold with an adjustable opening. The indentation-free bending machine lower mold comprises a mold base; the upper surface of the mold base is provided with two mold blocks protruding upward; the two mold blocks are arranged symmetrically on the central line of the mold base; the two mold blocks and the mold base are in a split-type structure; and the two mold blocks are slidingly mounted on the mold base, thereby an open-close arrangement is formed by the two mold blocks; the mold base is further provided with a locking unit for locking the mold blocks in any travel position. A pre-tightening bolt is employed to fix the mold blocks, thereby achieving an adjustable fixed connection among the mold blocks and the mold base; meanwhile, a spline surface is arranged on the contact surface among the mold base and the mold blocks, thereby preventing the mold blocks from becoming loose upon closing the mold; additionally, corners on inner sides of the mold blocks are provided with rollers, accordingly the conventional static friction is replaced by the rolling friction in the process of bending the sheet metal parts, thereby avoiding the indentations on the sheet metal.

Description

technical field [0001] The invention belongs to the field of bending processing of sheet metal parts, and in particular relates to a lower mold of a bending machine without indentation with adjustable opening. Background technique [0002] The adjustable lower die is a commonly used die in the field of sheet metal bending. By adjusting its opening size, it can be applied to bend sheets of different thicknesses and angles, and has a wide range of applications. At present, the structure of the commonly used insert-type adjustable lower die is as follows: the position of the die base is fixed, and the insert block is equipped with a series of sizes. The insert block is adjusted. The plug-in adjustable lower die has relatively low technical requirements and is easy to produce, but the operation is time-consuming and labor-intensive, and the production efficiency is low. At the same time, in the traditional bending process, the friction between the workpiece and the lower die b...

AI Technical Summary

Problems solved by technology

The plug-in adjustable lower mold has relatively low technical requirements and is easy to produce, but the operation is time-consuming and labor-intensive, and the production efficiency is low

At the same time, in the traditional bending process, the friction between the workpiece and the lower die body is static friction, which causes indentations and scratches on the surface of the workpiece due to extrusion, thus affecting the appearance quality and precision of the workpiece

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