Forging forming method of water chamber sealing head with side pipe nozzle

Abstract

The invention provides a forging forming method of a water chamber sealing head with a side pipe nozzle. The forging forming method includes the following steps: step one, compaction is conducted, specifically, a cutting handle is subjected to hot charging and weight decreasing firstly, then is conveyed into a furnace for heat preservation and compacted, is subjected to melting-down heating for two-upsetting and two-pulling, and the axial forging ratio is equal to or greater than three; step two, material separating is conducted, specifically, a blank after the step one is completed is subjected to segmented profiling to be divided into a side pipe nozzle part and a 'bowl'-shaped main body part, the side pipe nozzle part is lengthened in a pulled mode, five faces and two half-faces are subjected to log marking, then staggered pulling into square is conducted, and finally a remaining octagonal part is subjected to circle rolling; step three, the 'bowl'-shaped main body part is ground rotationally and is completed through a profiling flat anvil and a special lower die, and meanwhile, the shape of the side pipe nozzle part is not damaged; and step four, heat treatment after forging isconducted, specifically, two times of normalizing and one time of tempering are conducted, and thus a forge piece is obtained. Through the forging forming method, a weld seam is directly reduced whenconnecting pipes are separately manufactured and finally welded together, and the safety factor of the whole part is increased while the manufacturing cost is lowered.

Description

technical field [0001] The invention relates to the field of casting, in particular to a forging forming method of a water chamber head with side nozzles. Background technique [0002] With the development of nuclear power technology, forgings for nuclear power plants are constantly developing towards integration and miniaturization. In the nuclear power steam generator, the water chamber head is a very important part of the whole component, which acts as a solution circulation exchange valve. Due to the conditions of the working environment where the water chamber head is located, the designer considers safety and manufacturing. In the design of the latest steam generator components, the connecting pipe and the water chamber head are integrated to form a Nozzle water chamber head forgings to reduce welds and increase the safety factor of the entire component. [0003] The water chamber head with side nozzles has the following salient features: it is a special-shaped head ...

AI Technical Summary

Problems solved by technology

[0003] The water chamber head with side nozzles has the following salient features: it is a special-shaped head forging, there are many branch nozzles, the shape is complex, it is difficult to forge near the contour of the part, and the water chamber head with side nozzles is asymmetrical and has a "bowl" shape. The low height limits its possibilities in terms of stamping and forming

In addition, forging with full coverage will cause serious material waste, and this method is generally not considered

To sum up, the forging of the head with side nozzle water chamber is relatively difficult

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