A mold for manufacturing a fluid sealing cover for a nuclear power voltage stabilizer

Abstract

The invention discloses a mold for manufacturing a fluid sealing cover for a nuclear electric voltage regulator. The mold for manufacturing the fluid sealing cover for the nuclear electric voltage regulator comprises an elliptical flange upsetting plate, a preformed lower die, a preformed upper punch, a formed lower die and a formed punch, an elliptical stepped through hole is formed in the middleof the elliptical flange upsetting plate, the one end of the through hole is elliptical, and the other end of the through hole is circular; an elliptical stepped blind hole is formed in the middle ofthe preformed lower die, one end of the blind hole is elliptical, and the other end of the blind hole is hemispherical. The shape of the elliptical stepped blind hole is the same as that of a blank after upsetting performing, and the preformed lower die is used in combination with the preformed upper punch; the formed lower die is used in combination with the formed punch, and a hole is formed inthe middle of the formed lower die; the shape of a hole in the formed lower die and the shape of a punch body of the formed punch are the same as that of the fluid sealing cover. The mold for manufacturing the fluid sealing cover for the nuclear electric voltage regulator can forge deep cavity wide flange type forgings of different materials and different sizes, the fiber direction is distributedwith shape, safety and reliability are achieved, and the machining residual material is small, the material is saved, the processing cycle is short, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of forging thermal processing dies, in particular to a die for manufacturing a fluid sealing cover for a nuclear power voltage stabilizer. Background technique [0002] The fluid seal cover is a deep cavity and wide flange-shaped structural part used on nuclear equipment voltage stabilizers. It has very high requirements for high temperature resistance, high pressure, corrosion resistance, low internal defects, and comprehensive mechanical properties. The traditional manufacturing method of the fluid distribution cover is generally formed by forging a solid forging, and then drilling and turning the excess internal allowance; or forming by casting. At present, the products produced by forging are cut off due to the fiber direction inside the forging, which not only reduces their comprehensive mechanical properties and service life, but also requires a lot of time for machining due to the large machining allo...

AI Technical Summary

Problems solved by technology

At present, the products produced by forging are cut off due to the fiber direction inside the forging, which not only reduces their comprehensive mechanical properties and service life, but also requires a lot of time for machining due to the large machining allowance, and also causes waste of raw materials; However, casting is used for molding, and there is a problem of uneven distribution of material structure, resulting in comprehensive mechanical properties that cannot meet the manufacturing requirements of pressure vessels.

These two methods are made by mechanical processing to remove excess metal, which has large machining allowance, long processing cycle, large material waste and high manufacturing cost.

In addition, there are two main difficulties in the forging of the fluid seal cover for nuclear power regulators. One is that the inner cavity is deep and shaped, which is difficult to form. The wall thickness of the billet is thinned, resulting in a decline in the overall performance of the final product, which cannot meet the service requirements of nuclear power plants and increases nuclear safety risks

The second aspect is the end flange, which has a wide flange surface and is not a traditional circumferential flange. It is also difficult to form effectively during the forming process.

Images