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Forging forming method of the third generation nuclear power coolant pump casing

A coolant pump and forging forming technology, which is applied in the forming field of metal materials, can solve problems such as irregular shapes, achieve good forging and compacting effects, good economical efficiency, and reduce the difficulty of forming

Active Publication Date: 2016-06-29
SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the structure of the pump casing is a semi-closed hollow casing with a round or nearly oval shape and a nozzle with irregular shapes, it is quite difficult to forge this type forging.

Method used

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  • Forging forming method of the third generation nuclear power coolant pump casing
  • Forging forming method of the third generation nuclear power coolant pump casing
  • Forging forming method of the third generation nuclear power coolant pump casing

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Embodiment Construction

[0034] The forging forming method of the third generation nuclear power coolant pump casing of the present invention is used to form such as Figure 4 The pump casing forging shown with nozzles at both ends consists of the following steps:

[0035] The first step is to upsetting and elongating;

[0036] Upsetting the billet once, and then performing a strong pressing and drawing after upsetting to form a figure 1 the shape shown;

[0037] Control the height-to-diameter ratio of the blank during an upsetting process to meet the ratio of height to diameter ≥ 1;

[0038] The draw ratio of one-time strong pressure draw is ≥2;

[0039] The second step, secondary upsetting and elongation;

[0040] The billet is subjected to secondary upsetting, and after upsetting, it is subjected to secondary strong pressing and drawing to form a figure 2 the shape shown;

[0041] cutting the bottom after elongation to remove defects in the deposited zone of the ingot;

[0042] After cuttin...

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Abstract

The invention discloses a forging method of a pump housing of a third-generation nuclear power coolant pump. The forging method is used for forming a pump housing forging with nozzles on the two ends. The method comprises the following steps of: I, carrying out upsetting and drawing-out at one time, II, carrying out upsetting and drawing-out for the second time, III, carrying out upsetting for the third time, IV, trimming an excircle, and V, forming the nozzles. The method accomplishes forging of the forging with a complicated shape such as the pump housing by a free forging manner, has no special requirements on equipment, does not require complicated tools or operation technologies, and has better economy; and at the same time, the method can effectively accomplish forming of the shape of the pump housing, has a very good forging and compacting effect on an internal structure of the forging with a thick cross section, satisfies symmetrical requirements of the shape of the forging by adding the nozzles, effectively reduces the forming difficulty of the forging, and increases a machining adjustment space for subsequent forging machining.

Description

technical field [0001] The invention relates to a forming method of a metal material, in particular to a forging forming method of a pump casing of a third-generation nuclear power coolant pump. Background technique [0002] The nuclear power coolant pump, also known as the main circulation pump or the main pump, is an important part of the main equipment of the nuclear island. The function of the nuclear power coolant pump is to promote the high-speed and stable circulation of the coolant in the primary circuit to cool the core and transfer heat to the secondary circuit. The working environment of nuclear power coolant pumps is extremely harsh, especially the pump casing, which has been in a harsh environment of high temperature, high corrosion and high radiation for a long time. Therefore, the pump casing requires extremely safe and reliable quality. [0003] In the nuclear reactor system before the third generation, the pump casing was made of castings; with the developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00
Inventor 乔志洲陈永波宋雷钧凌进刘立楠王志新
Owner SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD
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