Ironing die structure

Abstract

The invention relates to an ironing die structure. The ironing die structure comprises a cavity die device which is of a stepped structure formed by multistep ironing cavity die inserting blocks. The inner diameters of the ironing cavity die inserting blocks decrease step by step, R angles gradually increase through inclined arc surfaces of the ironing cavity die inserting blocks, and accordingly the ironing force gradually decreases and the material accumulation during ironing is reduced. According to the ironing die structure, the problems that the thicknesses of the ironing side walls are non-uniform, components are fractured during ironing, and the like are solved due to produced cylinder parts which are thin in cylinder wall; the production efficiency and the product qualification rate are effectively improved; an ironing punch is protected by the inclined surface structure which is formed at the joint of the ironing punch and a punch fixing plate and accordingly the ironing punch is not easy to fracture due to the high strength work, the inconvenience brought by the replacement of the ironing punch is avoided, and the production cost is effectively reduced.

Description

technical field [0001] The invention relates to a thinning mold structure. Background technique [0002] In the production of various precision molds, the most common problems are the cracks or breakage of the material during the production process and the poor coaxiality of the parts during the thinning process, especially when producing thinner parts, such as the production of thinner cylinder walls For cylindrical parts, in the prior art, a method of gradually ironing multiple stations must be used to avoid cracks or breaks as much as possible, but this method requires multiple stations to work, which takes a long time and has low production efficiency. Moreover, it is difficult to ensure the coaxiality of the cylinder when the product is circulated at each station, and the qualified rate of the product is low. However, the ironing punch in the existing mold adopts a vertical structure and is connected to the punch fixing plate. In the high-strength production process, ...

AI Technical Summary

Problems solved by technology

[0002] In the production of various precision molds, the most common problems are the cracks or breakage of the material during the production process and the poor coaxiality of the parts during the thinning process, especially when producing thinner parts, such as the production of thinner cylinder walls For cylindrical parts, in the prior art, a method of gradually ironing multiple stations must be used to avoid cracks or breaks as much as possible, but this method requires multiple stations to work, which takes a long time and has low production efficiency. Moreover, it is difficult to ensure the coaxiality of the cylinder when the product is circulated at each station, and the product qualification rate is low

However, the ironing punch in the existing mold adopts a vertical structure and is connected to the punch fixing plate. In the high-strength production process, the punch with this structure is prone to stress concentration at the punch hook and will be cracked. The mold increases the production pressure and the production cost is too high

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