Bending machine lower mold, laminated combination non-indentation bending lower mold device

Abstract

The invention belongs to the field of bending of sheet metal parts, and particularly relates to a lower die of a bending machine and a laminated-type combined indentation-free bending lower die device. A machining plane for the parts to be bent is attached to the lower die body of the lower die of the bending machine and provided with a groove. The joints of the two ends of the groove and the portions, adjacent to the two ends of the groove, of the machining plane are respectively provided with an arc-shaped through hole penetrating through the lower die body. Core rods capable of rotating around the axes of the arc-shaped through holes arranged in the arc-shaped through holes in a penetrating mode, and the openings of the arc-shaped through holes are enclosed by the surfaces of the core rods so that the machining plane can be in smooth transition with the groove. When bending is carried out on the sheet metal parts, the parts only make contact with the core rods on the lower die body in the whole bending process and the core rods can rotate in the moving direction of a plate, so that traditional static friction is converted into rolling friction after the parts make contact with the lower die body, the indentations and scratches, caused by extrusion, of the surfaces of the parts are eliminated, and the appearance quality and the precision of the parts are improved.

Description

Technical field [0001] The invention belongs to the field of bending processing of sheet metal parts, and specifically relates to a lower mold of a bending machine and a laminated combined non-indentation bending lower mold device using the lower mold of the bending machine. Background technique [0002] At present, bending molds are commonly used mold equipment in sheet metal product processing and molding. With the rapid upgrading of products, the era of multi-variety and small-batch production is coming. The requirements for mold production cycle, manufacturing cost, and standardization are getting higher and higher, and traditional bending molds cannot meet the above requirements. [0003] At the same time, in the traditional bending process, the friction between the workpiece and the lower mold body is static friction, which causes the surface of the workpiece to produce indentation and scratches due to the extrusion, thereby affecting the appearance quality and accuracy of t...

AI Technical Summary

Problems solved by technology

The requirements for the production cycle, manufacturing cost and standardization of molds are getting higher and higher, and it is difficult for traditional bending molds to meet the above requirements

[0003] 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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