Integral forging method for integral connecting section with connecting pipe and flange
A technology of integral forging and flange, applied in the direction of engine components, mechanical equipment, etc., can solve the problems of not meeting its requirements, thick wall thickness, long length, etc.
Active Publication Date: 2017-01-04
CHINA FIRST HEAVY IND +1
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[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments: wherein, the accompanying drawings and the embodiments are used together to explain the principle of the present invention, but are not the only limitation of the present invention.
[0041] The present invention develops an integrated forging process for connecting pipes with connecting pipes and flanges through a large number of numerical simulations.
[0042] For size design:
[0043] The first step is to determine the characteristic size parameters of the integrated connecting pipe section with connecting pipe and flange, such as figure 1 , 2 shown, these dimensions include the inside diameter of the nozzle d 1 , outer diameter D 1 , take over the outer diameter of the nozzle at the front end D 2 ;Outer diameter of non-flange end D 3 , inner diameter of non-flange end d 3 , outer diameter of flange end D 4 , inner diameter of flange end...
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The invention discloses an integral forging method for an integrated connecting pipe section with a connecting pipe and a flange. The integral forging method is suitable for integral forging and forming of flange connecting pipe sections of nuclear reactor pressure vessels. On the basis that the feature size of the integrated connecting pipe section is determined, the size of a blank is designed; meanwhile, a triangular anvil, an n-shaped hammer, a horse lever, a flanging punch and a flanging lower die are manufactured at the same time; in the forging stage, the hollow blank with a middle ring belt is pressed in the position of a connecting pipe ring belt through the triangular anvil, a concave cross piece is pre-pressed, a connecting pipe boss is formed, and then the n-shaped hammer and the horse lever are used for conducting chambering to form a blank forge piece; finally, the blank forge piece is roughly machined to obtain the flanged blank, the connecting pipe is flanged to from a front-end pipe nozzle, and the finished integral connecting pipe section is obtained. According to the integral forging method, integral forging of the connecting pipe and the flange is achieved, the labor intensity is lowered, the production efficiency is improved, and the number of weld lines of a whole pressure vessel is reduced.
Description
technical field [0001] The invention relates to a manufacturing technology of an integrated connecting section with a connecting pipe of a nuclear reactor pressure vessel, in particular to an integral forging method for an integrated connecting section with a connecting pipe and a flange. Background technique [0002] The nuclear reactor pressure vessel flange connection section is one of the most important and most difficult to manufacture forgings in the nuclear island main equipment forgings. It is located in the middle of the pressure vessel and is connected with the inlet connection, outlet connection and safety injection connection. In the manufacturing process, the connecting pipes and the flanged pipe sections are manufactured separately, and then assembled and welded through saddle-shaped welds. This manufacturing process not only increases labor hours, but also increases the in-service inspection of nuclear reactor pressure vessels due to more welds. The difficulty...
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IPC IPC(8): B21K1/16
Inventor 王宝忠刘凯泉周岩曲在文杨晓禹胡杰刘敬杰
Owner CHINA FIRST HEAVY IND