CN104338879B - The method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case - Google Patents
The method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case Download PDFInfo
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- CN104338879B CN104338879B CN201310341949.3A CN201310341949A CN104338879B CN 104338879 B CN104338879 B CN 104338879B CN 201310341949 A CN201310341949 A CN 201310341949A CN 104338879 B CN104338879 B CN 104338879B
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Abstract
The invention discloses the method for forging and molding of a kind of generation Ⅲ nuclear power cooling medium pump pump case, for forming the two ends pump case forging with ozzle, comprise the following steps: the first step, a jumping-up pulling；Second step, secondary jumping-up pulls out；3rd step, three jumping-ups；4th step, cylindrical finishing；5th step, forms ozzle.The present invention completes the forging of this kind of complex-shaped forging of pump case in the way of open die forging, to equipment without particular/special requirement, it is not necessary to complicated frock and operating procedure, better economy；Simultaneously, the present invention can effectively complete the molding of pump case profile, well forging is had to close consolidation effect the interior tissue of thick cross section forging, and by increasing ozzle to reach the symmetrical requirements of forging shape, efficiently reduce the molding difficulty of forging, and the machining for follow-up forging adds the space that processing adjusts.
Description
Technical field
The present invention relates to the forming method of a kind of metal material, be specifically related to the method for forging and molding of a kind of generation Ⅲ nuclear power cooling medium pump pump case.
Background technology
Nuclear power cooling medium pump, also referred to as main circulation pump or main pump, is the vitals of nuclear island primary device.The function of nuclear power cooling medium pump is to promote coolant stably to circulate in primary Ioops high speed, to cool down reactor core and to transfer heat to secondary circuit.The working environment of nuclear power cooling medium pump is extremely severe, especially pump case, is chronically in the adverse circumstances of high temperature, high corrosion and high irradiation, and therefore, pump case requires the reliable quality of extremely safe.
In nuclear reactor system before three generations, pump case is all foundry goods；Along with the development and application of the Generation Ⅲ such as AP1000 and EPR, the quality of pump case be it is also proposed higher requirement, it is desirable to pump case adopts forging manufacture.But, owing to the structure of pump case is semi-enclosed hollow shell, profile is circular or close to oval, and with ozzle, shape is also irregular, and therefore this swaged forging part of forging has sizable difficulty.
Summary of the invention
The technical problem to be solved is to provide the method for forging and molding of a kind of generation Ⅲ nuclear power cooling medium pump pump case, and it can complete the forging of this kind of complex-shaped forging of pump case.
For solving above-mentioned technical problem, the technical solution of the method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case of the present invention is:
For forming the two ends pump case forging with ozzle, comprise the following steps:
The first step, a jumping-up pulling；
Blank is carried out a jumping-up, after jumping-up, once suppresses pulling again；
Ratio of height to diameter >=1 of blank in upsetting process；
Once suppress the pulling ratio >=2 of pulling；
Second step, secondary jumping-up pulls out；
Blank is carried out secondary jumping-up, carries out secondary after jumping-up again and suppress pulling；
Cutting bottom after pulling；After cutting, ratio of height to diameter h/d≤2 of blank；
3rd step, three jumping-ups；
Blank after cutting is carried out three jumping-ups, makes the height of blank be slightly less than the final height of forging；
4th step, cylindrical finishing；
The cylindrical of the blank after three jumping-ups is repaired, and the profile making blank is eight prisms；
5th step, forms ozzle；
Adopt mould, blank is divided many anvils through-thickness extrusion pump package mouth, blank is squeezed out ozzle, form pump case forging.
Mould includes anvil and lower anvil, upper anvil and the lower work surface of anvil and matches with the profile of forging.
In described mould, the thickness of upper anvil and lower anvil is much smaller than the thickness of blank.
What the present invention can reach has the technical effect that
The present invention completes the forging of this kind of complex-shaped forging of pump case in the way of open die forging, to equipment without particular/special requirement, it is not necessary to complicated frock and operating procedure, better economy；Simultaneously, the present invention can effectively complete the molding of pump case profile, well forging is had to close consolidation effect the interior tissue of thick cross section forging, and by increasing ozzle to reach the symmetrical requirements of forging shape, efficiently reduce the molding difficulty of forging, and the machining for follow-up forging adds the space that processing adjusts.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is forging schematic shapes after a jumping-up pulling；
Fig. 2 is forging schematic shapes after secondary jumping-up pulls out；
Fig. 3 is forging schematic shapes after three jumping-ups；
Fig. 4 is the schematic shapes of the last molding of forging；
Fig. 5 is the schematic diagram of mould of the present invention；
Fig. 6 is the mould shaping schematic view with forging of the present invention, and wherein Fig. 6 a is the side view of Fig. 6 b.
Description of reference numerals in figure:
1 is upper anvil, and 2 is lower anvil,
10 is forging.
Detailed description of the invention
The method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case of the present invention, for forming the pump case forging with ozzle of the two ends as shown in Figure 4, comprises the following steps:
The first step, a jumping-up pulling；
Blank is carried out a jumping-up, after jumping-up, once suppresses pulling again, form shape as shown in Figure 1；
Upsetting process controls the ratio of height to diameter of blank, meets height and diameter ratio >=1；
Once suppress the pulling ratio >=2 of pulling；
Second step, secondary jumping-up pulls out；
Blank is carried out secondary jumping-up, carries out secondary after jumping-up again and suppress pulling, form shape as shown in Figure 2；
Cutting bottom after pulling, to remove the defect in the crystallizing field of steel ingot；
After cutting, ratio of height to diameter h/d≤2 of blank；
3rd step, three jumping-ups；
Blank after cutting is carried out three jumping-ups, makes the height of blank be slightly less than the final height of forging, as shown in Figure 3；
4th step, cylindrical finishing；
The cylindrical of the blank after three jumping-ups is repaired, and the profile making blank is eight prisms；
Deflection in finishing is little as far as possible, makes the height of blank substantially not increase；
In the present invention round dressing process outside, it is eight prisms by forging stock contouring, to ensure the molding of follow-up pump case.
5th step, forms ozzle；
Adopt mould as shown in Figure 5, blank is divided many anvils through-thickness extrusion pump package mouth, blank is squeezed out ozzle, form pump case forging, as shown in Figure 4；
As shown in Figure 6, mould includes anvil 1 and lower anvil 2, and the work surface of upper anvil 1 and lower anvil 2 and the profile of forging 10 match；
The thickness of mould is much smaller than the thickness of blank.
The present invention, in the process of extruding ozzle, owing to the mold thickness used is much smaller than the thickness of forge piece blank reheating, is extruded by many anvils, it is possible to form the pump case forging shape needed.
The present invention can make blank have enough forging ratios and fully forge metal center by the enforcement of the first step to the 3rd step, no longer undertakes the effect forging saturating metal in deformation after unloading operation；The overall dimensions of forging can be made as close as part shape by the enforcement of the 4th step to the 5th step, reduce the follow-up amount of machining of forging, significantly shorten the manufacturing cycle.
The present invention adopts the mode of open die forging to complete the forging of pump case；First determine profile and the size of steel billet according to the profile of pump case so that it is as far as possible close to the profile of pump case, and ensure the shape having symmetry；Complete pump case finally by mould finally to shape.
Claims (3)
1. a method for forging and molding for generation Ⅲ nuclear power cooling medium pump pump case, for forming the two ends pump case forging with ozzle, it is characterised in that comprise the following steps:
The first step, a jumping-up pulling；
Blank is carried out a jumping-up, after jumping-up, once suppresses pulling again；
Ratio of height to diameter >=1 of blank in upsetting process；
Once suppress the pulling ratio >=2 of pulling；
Second step, secondary jumping-up pulls out；
Blank is carried out secondary jumping-up, carries out secondary after jumping-up again and suppress pulling；
Cutting bottom after pulling；After cutting, ratio of height to diameter h/d≤2 of blank；
3rd step, three jumping-ups；
Blank after cutting is carried out three jumping-ups, makes the height of blank be slightly less than the final height of forging；
4th step, cylindrical finishing；
The cylindrical of the blank after three jumping-ups is repaired, and the profile making blank is eight prisms；
5th step, forms ozzle；
Adopt mould, blank divides many anvils through-thickness squeeze out pump case ozzle, blank is squeezed out ozzle, form pump case forging.
2. the method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case according to claim 1, it is characterised in that the mould in described 5th step includes anvil and lower anvil, upper anvil and the lower work surface of anvil and matches with the profile of forging.
3. the method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case according to claim 2, it is characterised in that in described mould, the thickness of upper anvil and lower anvil is much smaller than the thickness of blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310341949.3A CN104338879B (en) | 2013-08-07 | 2013-08-07 | The method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case |
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| CN201310341949.3A CN104338879B (en) | 2013-08-07 | 2013-08-07 | The method for forging and molding of generation Ⅲ nuclear power cooling medium pump pump case |
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| CN104338879A CN104338879A (en) | 2015-02-11 |
| CN104338879B true CN104338879B (en) | 2016-06-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623466A (en) * | 2017-01-07 | 2017-05-10 | 河北宏润核装备科技股份有限公司 | Nuclear main pump shell hot extrusion forming technology |
| CN107486523B (en) * | 2017-09-30 | 2019-08-16 | Oppo广东移动通信有限公司 | A kind of method for producing shell |
| CN111014540B (en) * | 2020-01-02 | 2021-03-02 | 上海电气上重铸锻有限公司 | Third-generation nuclear power coolant pump shell profiling forging forming method |
| CN112045124B (en) * | 2020-08-28 | 2022-06-21 | 江阴南工锻造有限公司 | Special core rod for cylinder barrel inner hole concave step and forming method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002195244A (en) * | 2000-12-27 | 2002-07-10 | Somic Ishikawa Inc | Ball stud, its manufacturing method and universal coupling |
| CN101564750B (en) * | 2009-04-17 | 2011-02-02 | 二重集团（德阳）重型装备股份有限公司 | Process and device for forming straight-edge conical cylinder forged piece of nuclear power evaporator |
| CN101987342B (en) * | 2009-08-07 | 2012-12-05 | 上海重型机器厂有限公司 | Forging method of tube sheet of nuclear power equipment |
| CN102019334B (en) * | 2009-09-22 | 2012-10-03 | 上海重型机器厂有限公司 | Forging method of main pipe blank with branch pipe nozzles used in nuclear power station |
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Effective date of registration: 20161216 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy-Machine Factory Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy-Machine Factory Co., Ltd. |