Forging die set and forging method of large-scale thin-wall barrel type flange plate

Abstract

The invention discloses a forging die set and forging method of a large-scale thin-wall barrel type flange plate. The die set comprises a shaping die and a forging die for preforming a blank. The forging die comprises an upper die and a lower die, and cavities for pre-forming the blank are formed in the upper die and the lower die. A punch pin is arranged on the upper die. The cavities comprise afirst cavity and a second cavity which are formed in the lower die. A first through hole communicating with the second cavity is formed in the lower end of the lower die. The upper die is provided with a third cavity, wherein a flange portion of the pre-formed blank is formed by the third cavity and the first cavity. Both the second cavity and the punch pin have pattern drafts. The shaping die isused for expanding and shaping an inner hole of the pre-formed blank. The forging method is implemented by adopting the die. Firstly, the blank is pressed into a cake-shaped blank; and then the middleportion of the cake-shaped blank is pressed to form a pit; and the upper die is matched with the lower die to forge the flange plate with a barrel body. The forging die set and forging method of thelarge-scale thin-wall barrel type flange plate have the beneficial effects that the step of punching in traditional tire film forging is omitted, materials can be saved, and the production efficiencyis improved.

Description

technical field [0001] The invention belongs to the field of forging flanges, and in particular relates to a complete set of forging dies for large thin-walled cylindrical flanges and a forging method thereof. Background technique [0002] The oil filling device on the top of the tanker includes a support flange, the diameter of the support flange is Ø699mm, the outer diameter of the cylindrical part is Ø540mm, the inner diameter is Ø508mm, and the wall thickness is 16mm. The weight of the supporting flange made of ASTM A350 is 118kg. At present, for the manufacture of such large thin-walled flanges, only the method of forging the membrane can be used. The process steps are as follows: firstly select a blank with a weight of 300kg, then use the inner upsetting of the membrane, then punch small holes, and then pass through The method of multiple reaming is preformed; finally, the finished product is made by cutting. [0003] However, the forging cost of the above-mentioned ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of serious material waste in the production process of the above-mentioned large-scale thin-walled cylindrical flanges, the present invention provides a complete set of forging dies for large-scale thin-walled cylindrical flanges and a forging method thereof. High-precision punch and the forging die of the second cavity directly forge a thin-walled cylindrical flange with an inner hole, and then use the shaping die to straighten the draft angle to make a forging

Images