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Forging method for elliptical seal head of CAP1400 steam generator

An elliptical head and steam generator technology, which is applied to metal processing equipment and other directions, can solve the problems of small head slabs, inability to directly stamp and forge oval heads, etc., and achieve the effect of solving manufacturing problems.

Active Publication Date: 2014-02-12
SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing 16,500-ton hydraulic press with the largest opening size has a opening size of 7.5 meters, but it is still smaller than the expansion size of the head slab, so it cannot be directly stamped and forged for the oval head

Method used

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  • Forging method for elliptical seal head of CAP1400 steam generator
  • Forging method for elliptical seal head of CAP1400 steam generator
  • Forging method for elliptical seal head of CAP1400 steam generator

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Embodiment Construction

[0034] The method for forging and forming the elliptical head of the CAP1400 steam generator of the present invention is used for the forging and forming of the super-sized elliptical head with an inner diameter not less than 5000mm, comprising the following steps:

[0035] The first step is blank making; forming a circular slab with a diameter of 7200±100mm and a thickness of 330±10mm (maximum thickness), such as figure 2 As shown; the top surface of the circular slab is a plane, and the thickness of the central part of the circular slab is greater than the thickness of the peripheral part;

[0036] The second step is heating; put the round slab into the heating furnace for heating, so that the temperature of the round slab is controlled at 900-1150°C; when heating, place a pad iron under the round slab to make the round slab The two sides of the body are evenly heated and kept warm so that the surface is at the same temperature as the heart;

[0037] The third step is to a...

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Abstract

The invention discloses a forging method for an elliptical seal head of a CAP1400 steam generator. The forging method comprises the steps of 1) manufacturing a blank; 2) heating; 3) assembling a die; 4) preforming; 5) stamping. By adopting the forging method, when the elliptical seal head with ultra-large size cannot be directly forged, firstly a circular plate blank with smaller diameter is preformed through a forging method of rotary drawing to increase the arc length of a workpiece and form an enough large circular-arc-shaped blank, and then the blank is stamped as a whole body to meet the requirement on the final size of the ultra-large size elliptical seal head. Therefore, the forging method for the elliptical seal head of the CAP1400 steam generator can effectively solve the problem that the large-sized and integrated forged piece of the elliptical seal head of the CAP1400 steam generator is difficult to manufacture.

Description

technical field [0001] The invention relates to a forging forming method of nuclear power equipment, in particular to a forging forming method of an elliptical head of a CAP1400 nuclear power steam generator. Background technique [0002] In recent years, as the international energy tends to be tense, the energy crisis has become one of the main factors of instability in the international environment, and all countries are vigorously developing new energy sources to ease economic pressure. China's energy structure is also being adjusted, reducing the proportion of coal in the energy structure, vigorously advocating the development of new energy, and taking nuclear energy as one of the main directions for the development of new energy. [0003] With the development of nuclear power technology, China's nuclear power technology has developed from the original second-generation pressurized water reactor nuclear power technology to the second-generation improved nuclear power tec...

Claims

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Application Information

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IPC IPC(8): B21J5/02
Inventor 陶志勇张灵芳宋雷钧凌进叶志强
Owner SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD
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