Forging forming method for main pipe blank with asymmetric pipe nozzles
An asymmetrical main pipe technology, applied to engine components, mechanical equipment, etc., can solve the problems of difficult control of shape and size, large margin of main pipe blank forgings, etc., to reduce the risk of scrapping, ensure control difficulty, and improve The effect of utilization
Active Publication Date: 2019-08-16
CHINA ERZHONG GRP DEYANG HEAVY IND
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a forging method for the main pipe blank with asymmetric nozzles, so that the center of the base circle of the tube section where each nozzle is located is on the same axis. The main pipe blank forgings produced has a large blank margin and difficult shape and size control
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[0044] The present invention will be further explained below.
[0045] The method for forging and forming a main pipe blank with an asymmetric nozzle disclosed in the present invention. The main pipe blank has a first nozzle and a second nozzle that are asymmetric with each other, and is characterized in that it comprises the following steps:
[0046] 1. According to the designed included angle between the first nozzle and the second nozzle, the blank is made into a regular polygonal cross-sectional structure, and the outer angle of the regular polygonal cross-section is equal to the included angle between the first and second nozzles;
[0047] For example, if the angle between the first nozzle and the second nozzle is 45°, the blank is made into a regular octagonal cross-sectional structure. For example, if the angle between the first nozzle and the second nozzle is 60°, then the The blank is made into a six-octagonal cross-sectional structure, which is to make it easier to determin...
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The invention relates to a forging forming method for a main pipe blank with integrated pipe nozzles, and discloses the forging forming method for the main pipe blank with the asymmetric pipe nozzles.According to the forging forming method, under the condition that control is carried out through simultaneous tangency of a base circle of a main pipe and the two edges of a polygonal cross section,when flattening is carried out to form the two pipe nozzles, asymmetric deformation is achieved firstly through the different upper and lower anvil contact areas, then symmetric deformation is carriedout through upper and lower anvils with the same contact areas, three straight pipes of the main pipe are partially are concentric, the forging allowance and shape size control difficulty of the forging blank can be ensured, the utilization rate of a steel ingot is improved, and the risk that the forging blank is scrapped due to the shape and size is greatly reduced.
Description
Technical field [0001] The invention relates to a forging forming method of a main pipe blank with an integrated nozzle, in particular to a forging forming method of a main pipe blank with an asymmetric nozzle. Background technique [0002] It is well-known: With the popularization and application of third-generation nuclear power technology and the large-scale development of petrochemical industry containers, in order to reduce welds and enhance equipment reliability, more and more large-scale and complex-shaped key components of difficult-to-forge materials require integrated forgings. To make. At present, domestic and foreign forging main pipes with integrated nozzles with different orientations are mainly used to form the nozzles in a large enveloping manner and draw them into hexagonal or octagonal sections according to the nozzle angle. Use triangles of different depths to divide the materials into these two ways. [0003] The large envelope method is to enclose the nozzle ...
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IPC IPC(8): B21K1/14B21K1/16
CPCB21K1/14B21K1/16
Inventor 沈国劬余江山
Owner CHINA ERZHONG GRP DEYANG HEAVY IND