Press fit die

Abstract

The invention discloses a press fit die. The press fit die comprises a lower die plate, a sliding block, an upper die plate and a driving wedge block. The upper die plate is arranged over the lower die plate and can carry out reciprocating motion upwards and downwards relative to the lower die plate. The driving wedge block is arranged on the upper die plate. A first wedge hole which penetrates through the two opposite side faces, including the upper side face and the lower side face, of the sliding block is formed in the sliding block. When the driving wedge block moves along with the upper die plate, the driving wedge block can drive the sliding block to carry out reciprocating motion leftwards and rightwards by pressing the hole wall of the first wedge hole both in the process of beinginserted into the first wedge hole and in the process of being pulled out of the first wedge hole. Because the shape cooperation between the first wedge hole and the driving wedge block is utilized, the direct transformation of the movement positions in two perpendicular directions is realized without energy loss, the transformation efficiency is high, and a press does not need higher tonnage; meanwhile, because a hard mechanical structure is adopted, a system has good stability, and mechanical damage is not prone to being caused; and the integral structure is simple, and the size is small.

Description

technical field [0001] The invention belongs to the field of punching and wrapping equipment, in particular to a pressing die. Background technique [0002] With the improvement of manufacturing level, the public's requirements for appearance parts are also gradually increasing. Therefore, in the process of stamping parts splicing, the selection will try to avoid solder joints, rivets and other splicing methods that affect the appearance of the image. Therefore, the application of hemming processing methods The more more and more widely. [0003] At present, a slider is installed on the pre-curved knife block of the press-fitting mold for edge wrapping processing. The reciprocating stroke of the slider is driven by a spring. The spring is set along the sliding direction of the slider. The pre-bending knife block is stretched out to pre-bend the part or shrink back to reset. [0004] In the pressing die of the prior art, the spring needs to be retracted twice in one hemming...

AI Technical Summary

Problems solved by technology

[0004] In the pressing die of the prior art, the spring needs to be retracted twice in one hemming stroke, and the work is frequent, which easily leads to fatigue damage of the spring, and the spring function is unstable, which easily leads to damage to the parts of the pressing die; In addition, due to the characteristics of the spring, sufficient preload is required to store enough elastic force, which limits the number of strokes of the punching machine. The use of springs will increase the size of the mold, and it may be necessary to select a larger tonnage mold due to the increase in the area of ​​the workbench. press, causing waste of resources

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