Die assembly dedicated for production of fan cover

Abstract

The invention discloses a die assembly dedicated for production of a fan cover. According to the fan cover produced through the die assembly, the outline of the fan cover is a hollow cylinder, the lower surface of the fan cover is provided with a circular opening, the upper surface of the fan cover is provided with 6 groups of fan-shaped faces with the central circular opening as a circle center, each fan-shaped face is provided with four long-strip-shaped gradually-changing punching holes, four groups of arched protrusions are distributed on the side surface of the fan cover at intervals, and each protrusion is provided with a circular hole. The die assembly dedicated for the production of the fan cover comprises a blanking die, a stretching edge-cutting composite die, an upper surface punching die, and a side surface punching die according to the sequence of production technologies. By the adoption of the die assembly dedicated for the production of the fan cover, investment of a factory is reduced, and pressure edges are evenly distributed so as to improve the surface smoothness of produced workpieces; the technology of stretching and the technology of edge cutting are completed in the same procedure at the same time, so that manufacture of one technology die is eliminated. The die assembly can be used for punching irregular holes large in concentration degree in the upper surface of the fan cover and circular holes in the circular protrusions on the side surface.

Description

technical field [0001] The invention relates to the production of a mechanical workpiece, in particular to a special mold set for the production of a fan cover. Background technique [0002] For the fan cover produced by our company, the processing of sheet metal includes blanking, stretching, edge trimming and punching, the die steel material used in each process, the parameter setting of the heat treatment process and the structural design of the die will all affect the reasonableness of the workpiece. stability, especially the structural design of the mold, will directly determine the quality of the product. In the existing technology, for the selection of mold materials and heat treatment process parameters, different manufacturers will have different technical support. However, improper material selection It will reduce the hardness of the mold, and improper setting of heat treatment parameters will also affect the hardenability of the mold, increase the carbon emission...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention adopts the microalloy Cr12MoV as the mold material, changes the original heat treatment parameters in the heat treatment stage of the material, and improves its hardenability; designs and improves the structure of the fan cover production mold, In order to increase the rationality and stability of the unilateral gap, reduce the frequency of flat grinding of the cutting edge, and solve the problems of uneven distribution of the blank holder force, the invention can punch out the irregular gradient holes and the large concentration on the upper surface of the fan cover at one time. The round hole on the round protrusion on the side surface, and the punched hole has no burrs and the edge is smooth

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