Production method for water chamber head of nuclear power equipment

Abstract

The invention discloses a method for producing a water chamber head of nuclear power equipment, a cylindrical blank work-piece is processed into a water chamber head with a plurality of inclined pipe orifices by adopting a numerical control position changer matching with a numerical control boring-milling machine in the following steps of: firstly, drawing lines; secondly, carrying out rough processing: a, clamping the work-piece; b, rotating and / or turning a working table top of the numerical control position changer to enable the inclined pipe orifices to be processed to locate at a horizontal position; and roughly processing the inner circle surfaces, the outer circle surfaces and the end surfaces of the inclined pipe orifices and related curved surfaces around the pipe orifices; c, rotating and / or turning the working table top of the position changer to another station for roughly processing the inclined pipe orifice at the another station; thirdly, detecting flaws; and fourthly, finely processing. The water chamber head with the plurality of inclined pipe orifices is processed by adopting the numerical control position changer, the inner circular surfaces, the outer circular surfaces and complicated related curved surfaces of the pipe orifices in the water chamber head can be accurately processed, the processing precision of parts is guaranteed, the unnecessary turnaroundtime of the part in the whole processing process is decreased, and the production cycle is greatly reduced.

Description

technical field [0001] The invention relates to a metal cutting machining method, in particular to a method for manufacturing a water chamber head of nuclear power equipment. Background technique [0002] Nowadays, the application of nuclear power industry, the key project of new energy, has become more and more extensive. The current nuclear power industry has developed to the third generation of nuclear power technology, which uses AP1000 nuclear power plants. Among the equipment of this nuclear power plant, its key components (including pressure vessels, steam generators, etc.) are all made of forgings. These key components are not only huge in size, but also relatively complex in shape, so the manufacture of such large forgings is a major problem in the manufacture of nuclear power plants. [0003] Such as figure 1 , figure 2 The head of the water chamber in the steam generator shown cannot be forged on a hydraulic press due to its complex shape. At present, the pr...

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Problems solved by technology

[0006] b. The process of placing the workpiece on the triangular iron frame requires quite high skills for the driving and lifting workers. Ordinary workers cannot successfully install it at one time, and the tonnage of the workpiece to be processed is above 100 tons. If the workpiece cannot be installed correctly, it will be accompanied by There will be a certain probability of security issues;

[0007] c. Since the workpiece needs to be placed on an inclined surface during the processing, it is difficult to find the center position of the workpiece in the head of the water chamber. Because the tonnage of the workpiece is too large, it is necessary to cooperate with the driving every time the nozzle position is adjusted, and the driving every time The adjustment amount cannot be controlled perfectly, so the whole alignment process is quite cumbersome and the accuracy is relatively low, which not only requires a lot of manpower and material resources, but also cannot guarantee the angular position and size of the nozzle in the construction drawing

[0008] d. The ability to repeat positioning is poor, and it cannot accurately meet the required processing conditions

[0009] Although a five-axis linkage machine tool has appeared at present, this kind of machine tool is used to process such large castings and forgings with a tonnage of hundreds of tons and a machining allowance of more than 400mm, and it takes a huge amount of man-hours to complete the manufacture of a water chamber head. , so it cannot satisfy the rapid development of the nuclear power industry

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