CN102974731A - Forging method for integral sealing head for nuclear power - Google Patents

Forging method for integral sealing head for nuclear power Download PDF

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Publication number
CN102974731A
CN102974731A CN2012105654559A CN201210565455A CN102974731A CN 102974731 A CN102974731 A CN 102974731A CN 2012105654559 A CN2012105654559 A CN 2012105654559A CN 201210565455 A CN201210565455 A CN 201210565455A CN 102974731 A CN102974731 A CN 102974731A
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China
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blank
counterdie
blanks
forging
heating
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CN2012105654559A
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Chinese (zh)
Inventor
刘颖
王宝忠
郭义
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中国第一重型机械股份公司
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Priority to CN2012105654559A priority Critical patent/CN102974731A/en
Publication of CN102974731A publication Critical patent/CN102974731A/en

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Abstract

The invention discloses a forging method for an integral sealing head for nuclear power. Before loose tooling forging, a blank is prepared by using a free forging process, and then loose tooling forging is performed. The forging method comprises the following steps: (1) blanking of free forging: blanking blanks having smooth surfaces without breakage; (2) uniformly coating a Ta1350 lubricating agent on the forming surface of a lower mold; (3) pre-upsetting outside the mold: heating the blanks to 1250 DEG C, preserving the heat of the blanks for 45-65 hours, and pre-upsetting the blanks for a down stroke of 500 mm; (4) integral upsetting in a lower mold: integrally upsetting the blanks for 0.5-1 hour until the diameters of the blanks are about phi 3800-5000 mm, heating the blanks to 1250 DEG C and preserving the heat of the blanks for 60-75 hours; (5) local rotating and upsetting in the lower mold: locally rotating and upsetting the blanks by using a 650-850 mm wide flat hammer head, ending up the local rotating and upsetting after the external surfaces of the blanks are in contact with the inner wall of the lower mold, reheating the blanks to 1250 DEG C, and preserving the heat of the blanks for 70-80 hours; and (6) forming recesses in the blanks by using a strip-shaped rotating hammer head: placing the blanks in the lower mold and screwing down the blanks to form spherical cavities in a step-by-step and multi-stage way.

Description

A kind of nuclear power method for forging and molding of integrated head
Technical field
The present invention relates to a kind of nuclear power method for forging and molding of integrated head, specifically a kind of asymmetric non-contour adapter and the integrated method for forging and molding of ultra-large thick-wall end socket belong to the sinter forging technical field.
Background technology
For reducing weld seam and inservice inspection workload, improve service life of equipment, nuclear power all adopts the global design structure with end socket, and namely end socket no longer adopts Welding Structure with adapter, but directly is designed to the integral structure pattern.Because a plurality of adapters position on the integrated end socket outer surface is asymmetric, the mouth of pipe is towards difference, highly do not wait, so adopt of the forging molding of this end socket covers cover type free forging process method more, be about to the end socket outer radius of sphere and enlarge, all adapters of outer surface are covered wherein, be swaged into a very thick spherical shell cover, then remove unnecessary dressing with mechanical means, each adapter of moulding.Although the open die forging forming method is simple, stock utilization is low, and the manufacturing cycle is long, and adapter place fibre flow is discontinuous, and the forging modification is inhomogeneous insufficient, the interiors of products poor quality, and homogenieity is poor.Each is taken over but adopt conventional loose tool to forge straight forming, overcomes the shortcomings of above-mentioned open die forging moulding, but because integrated end socket forging overall dimensions and wall thickness are all very large, nearly 200 tons of forge weight, therefore the required forming force of conventional loose tooling forging is very large.As calculated, adopt the above-mentioned integrated end socket forging of conventional loose tooling forging moulding to need 100,000 ton large-scale press, also do not have in the world at present this large press.
Summary of the invention
In order to overcome the deficiency on above-mentioned technology and the equipment, the object of the present invention is to provide a kind of nuclear power with the method for forging and molding of integrated head, the method can be on 15000 tons of press the high integrated ultra-large thick-wall end socket of taking over of forging molding band.
The technical solution adopted for the present invention to solve the technical problems is: before loose tooling forging, adopt the free forging process base, guarantee that blank forges compacting, then carry out the loose tooling forging moulding.
The implementation step is as follows:
The first step: open die forging blanking: require blank surface not hammer flower into shape, folding is not hindered, and surface quality is smooth intact.Behind the jaw gas cutting, the gas cutting residue should be cleaned out.
Second step: cleaning counterdie and the lip-deep iron scale of press bed, the counterdie molded surface is evenly smeared the Ta1350 lubricant, counterdie is placed on the press bed and with movable crossrail of press centre line aligning centering;
The 3rd step: mould is pre-upset outward: blank heating to 1250 ℃, be incubated after 45-65 hours, and use shallow trace tongs that blank is taken out from heating furnace and be put on the platform, pre-upset, to remove its scale on surface.The depression stroke of pre-upsetting 500mm.
The 4th step: whole jumping-up in the counterdie: use the blank after shallow trace tongs will be pre-upset to be placed in the counterdie, upset plate carries out whole jumping-up to blank in the use.Whole jumping-up after 0.5 to 1 hour blank diameter be about φ 3800-5000mm, blank is taken out in counterdie, put heating furnace into and re-start heating, 1250 ℃ of heating-up temperatures are incubated 60-75 hours.
The 5th step: local rotation jumping-up in the counterdie: lay the auto back turntable at press bed, itself and press center line aligned, then counterdie is put on the panoramic table and with panoramic table centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, uses the wide flat die of 650-850mm that blank is carried out part and rotates jumping-up.When the blank outer surface with finish local rotation jumping-up after the counterdie inwall contacts, blank is taken out in counterdie, put heating furnace into and again heat.1250 ℃ of heating-up temperatures are incubated 70-80 hours.
The 6th step: stripe shape rotation tup recessing: stripe shape is rotated tup with movable crossrail of press connects, counterdie is put on the press bed and with rotate tup centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, utilizes rotation tup substep multi-pass to depress shaping blank ball-type inner chamber.Rotary hammer head width 650mm, 20 ° of the anglecs of rotation, tup is depressed 200mm at every turn, total depression stroke 1250-1500mm.
The invention has the beneficial effects as follows: the combination of the multiple molding mode such as adopt that whole jumping-up, local rotation jumping-up and multi-step rotation multi-pass are depressed, on than skinny device (15000 tons of press), finishing the integrated imitative type loose tool of asymmetric non-contour adapter and ultra-large thick-wall end socket forges, improve stock utilization, shorten the manufacturing cycle, adapter place fibre flow is continuous, guarantees that the forging modification is abundant and even, the interiors of products quality improves, and homogenieity is good.
The specific embodiment
Before loose tooling forging, adopt the free forging process base, guarantee that blank forges compacting, then carry out the loose tooling forging moulding.
The implementation step is as follows:
The first step: open die forging blanking: require blank surface not hammer flower into shape, folding is not hindered, and surface quality is smooth intact.Behind the jaw gas cutting, the gas cutting residue should be cleaned out.
Second step: cleaning counterdie and the lip-deep iron scale of press bed, the counterdie molded surface is evenly smeared the Ta1350 lubricant, counterdie is placed on the press bed and with movable crossrail of press centre line aligning centering;
The 3rd step: mould is pre-upset outward: blank heating to 1250 ℃, be incubated after 45-65 hours, and use shallow trace tongs that blank is taken out from heating furnace and be put on the platform, pre-upset, to remove its scale on surface.The depression stroke of pre-upsetting 500mm.
The 4th step: whole jumping-up in the counterdie: use the blank after shallow trace tongs will be pre-upset to be placed in the counterdie, upset plate carries out whole jumping-up to blank in the use.Whole jumping-up after 0.5 to 1 hour blank diameter be about φ 3800-5000mm, blank is taken out in counterdie, put heating furnace into and re-start heating, 1250 ℃ of heating-up temperatures are incubated 60-75 hours.
The 5th step: local rotation jumping-up in the counterdie: lay the auto back turntable at press bed, itself and press center line aligned, then counterdie is put on the panoramic table and with panoramic table centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, uses the wide flat die of 650-850mm that blank is carried out part and rotates jumping-up.When the blank outer surface with finish local rotation jumping-up after the counterdie inwall contacts, blank is taken out in counterdie, put heating furnace into and again heat.1250 ℃ of heating-up temperatures are incubated 70-80 hours.
The 6th step: stripe shape rotation tup recessing: stripe shape is rotated tup with movable crossrail of press connects, counterdie is put on the press bed and with rotate tup centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, utilizes rotation tup substep multi-pass to depress shaping blank ball-type inner chamber.Rotary hammer head width 650mm, 20 ° of the anglecs of rotation, tup is depressed 200mm at every turn, total depression stroke 1250-1500mm.
Embodiment 1
The implementation step is as follows:
The first step: open die forging blanking: require blank surface not hammer flower into shape, folding is not hindered, and surface quality is smooth intact.Behind the jaw gas cutting, the gas cutting residue should be cleaned out.
Second step: cleaning counterdie and the lip-deep iron scale of press bed, the counterdie molded surface is evenly smeared the Ta1350 lubricant, counterdie is placed on the press bed and with movable crossrail of press centre line aligning centering;
The 3rd step: mould is pre-upset outward: blank heating to 1250 ℃, be incubated after 55 hours, and use shallow trace tongs that blank is taken out from heating furnace and be put on the platform, pre-upset, to remove its scale on surface.The depression stroke of pre-upsetting 500mm.
The 4th step: whole jumping-up in the counterdie: use the blank after shallow trace tongs will be pre-upset to be placed in the counterdie, upset plate carries out whole jumping-up to blank in the use.Whole jumping-up after 0.5 to 1 hour blank diameter be about φ 4680mm, blank is taken out in counterdie, put heating furnace into and re-start heating, 1250 ℃ of heating-up temperatures are incubated 70 hours.
The 5th step: local rotation jumping-up in the counterdie: lay the auto back turntable at press bed, itself and press center line aligned, then counterdie is put on the panoramic table and with panoramic table centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, uses the wide flat die of 850mm that blank is carried out part and rotates jumping-up.When the blank outer surface with finish local rotation jumping-up after the counterdie inwall contacts, blank is taken out in counterdie, put heating furnace into and again heat.1250 ℃ of heating-up temperatures are incubated 70 hours.
The 6th step: stripe shape rotation tup recessing: stripe shape is rotated tup with movable crossrail of press connects, counterdie is put on the press bed and with rotate tup centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, utilizes rotation tup substep multi-pass to depress shaping blank ball-type inner chamber.Rotary hammer head width 650mm, 20 ° of the anglecs of rotation, tup is depressed 200mm at every turn, total depression stroke 1250mm.
Embodiment 2
The implementation step is as follows:
The first step: open die forging blanking: require blank surface not hammer flower into shape, folding is not hindered, and surface quality is smooth intact.Behind the gas cutting, the gas cutting residue should be cleaned out.
Second step: cleaning counterdie and the lip-deep iron scale of press bed, the counterdie molded surface is evenly smeared the Ta1350 lubricant, counterdie is placed on the press bed and with movable crossrail of press centre line aligning centering;
The 3rd step: the jumping-up drain cap is pre-upset: blank heating to 1250 ℃, be incubated after 45 hours, and use shallow trace tongs that blank is taken out from heating furnace and be put in the jumping-up drain cap, pre-upset, to remove its scale on surface.The depression stroke of pre-upsetting 500mm.
The 4th step: whole jumping-up in the counterdie: use the blank after shallow trace tongs will be pre-upset to be placed in the counterdie, upset plate carries out whole jumping-up to blank in the use.Whole jumping-up after 0.5 to 1 hour blank diameter be about φ 3800mm, blank is taken out in mold, put heating furnace into and re-start heating, 1250 ℃ of heating-up temperatures are incubated 60 hours.
The 5th step: local rotation jumping-up in the counterdie: lay the auto back turntable at press bed, itself and press center line aligned, then counterdie is put on the panoramic table and with panoramic table centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, uses the wide flat die of 850mm that blank is carried out part and rotates jumping-up.When the blank outer surface with finish local rotation jumping-up after the counterdie inwall contacts, blank is taken out in counterdie, put heating furnace into and again heat.1250 ℃ of heating-up temperatures are incubated 80 hours.
The 6th step: stripe shape tup rotation recessing: stripe shape is rotated tup with movable crossrail of press connects, counterdie is put on the press bed and with rotate tup centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, utilizes rotation tup substep multi-pass to depress shaping blank ball-type inner chamber.Rotary hammer head width 650mm, 20 ° of the anglecs of rotation, tup is depressed 200mm at every turn, total depression stroke 1440mm.
Embodiment 3
The implementation step is as follows:
The first step: open die forging blanking: require blank surface not hammer flower into shape, folding is not hindered, and surface quality is smooth intact.Behind the jaw gas cutting, the gas cutting residue should be cleaned out.
Second step: cleaning counterdie and the lip-deep iron scale of press bed, the counterdie molded surface is evenly smeared the Ta1350 lubricant, counterdie is placed on the press bed and with movable crossrail of press centre line aligning centering;
The 3rd step: mould is pre-upset outward: blank heating to 1250 ℃, be incubated after 65 hours, and use shallow trace tongs that blank is taken out from heating furnace and be put on the platform, pre-upset, to remove its scale on surface.The depression stroke of pre-upsetting 500mm.
The 4th step: whole jumping-up in the counterdie: use the blank after shallow trace tongs will be pre-upset to be placed in the counterdie, upset plate carries out whole jumping-up to blank in the use.Whole jumping-up after 0.5 to 1 hour blank diameter be about φ 5000mm, blank is taken out in counterdie, put heating furnace into and re-start heating, 1250 ℃ of heating-up temperatures are incubated 75 hours.
The 5th step: local rotation jumping-up in the counterdie: lay the auto back turntable at press bed, itself and press center line aligned, then counterdie is put on the panoramic table and with panoramic table centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, uses the wide flat die of 850mm that blank is carried out part and rotates jumping-up.When the blank outer surface with finish local rotation jumping-up after the counterdie inwall contacts, blank is taken out in counterdie, put heating furnace into and again heat.1250 ℃ of heating-up temperatures are incubated 80 hours.
The 6th step: stripe shape rotation tup recessing: stripe shape is rotated tup with movable crossrail of press connects, counterdie is put on the press bed and with rotate tup centering centering.Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, utilizes rotation tup substep multi-pass to depress shaping blank ball-type inner chamber.Rotary hammer head width 650mm, 20 ° of the anglecs of rotation, tup is depressed 200mm at every turn, the descending 1500mm of stagnation pressure.

Claims (1)

1. a nuclear power before loose tooling forging, adopts the free forging process base with the method for forging and molding of integrated head, guarantees that blank forges compacting, then carries out the loose tooling forging moulding, it is characterized in that:
The implementation step is as follows:
The first step: open die forging blanking: require blank surface not hammer flower into shape, folding is not hindered, and surface quality is smooth intact; Behind the jaw gas cutting, the gas cutting residue should be cleaned out;
Second step: cleaning counterdie and the lip-deep iron scale of press bed, the counterdie molded surface is evenly smeared the Ta1350 lubricant, counterdie is placed on the press bed and with movable crossrail of press centre line aligning centering;
The 3rd step: mould is pre-upset outward: blank heating to 1250 ℃, be incubated after 45-65 hours, and use shallow trace tongs that blank is taken out from heating furnace and be put on the platform, pre-upset, to remove its scale on surface; The depression stroke of pre-upsetting 500mm;
The 4th step: whole jumping-up in the counterdie: use the blank after shallow trace tongs will be pre-upset to be placed in the counterdie, upset plate carries out whole jumping-up to blank in the use; Whole jumping-up after 0.5 to 1 hour blank diameter be about φ 3800-5000mm, blank is taken out in counterdie, put heating furnace into and re-start heating, 1250 ℃ of heating-up temperatures are incubated 60-75 hours;
The 5th step: local rotation jumping-up in the counterdie: lay the auto back turntable at press bed, itself and press center line aligned, then counterdie is put on the panoramic table and with panoramic table centering centering; Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, uses the wide flat die of 650-850mm that blank is carried out part and rotates jumping-up; When the blank outer surface with finish local rotation jumping-up after the counterdie inwall contacts, blank is taken out in counterdie, put heating furnace into and again heat; 1250 ℃ of heating-up temperatures are incubated 70-80 hours;
The 6th step: stripe shape rotation tup recessing: stripe shape is rotated tup with movable crossrail of press connects, counterdie is put on the press bed and with rotate tup centering centering; Blank uses shallow trace tongs feeding and blank is placed in the counterdie after temperature, utilizes rotation tup substep multi-pass to depress shaping blank ball-type inner chamber; Rotary hammer head width 650mm, 20 ° of the anglecs of rotation, tup is depressed 200mm at every turn, total depression stroke 1250-1500mm.
CN2012105654559A 2012-12-24 2012-12-24 Forging method for integral sealing head for nuclear power CN102974731A (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN104259362A (en) * 2014-10-21 2015-01-07 中国第一重型机械股份公司 Nuclear reactor integrating lower end socket integrity profiling and forging method
CN104368724A (en) * 2014-11-24 2015-02-25 二重集团(德阳)重型装备股份有限公司 Forging forming process for large thick-wall end socket with bearing and nozzle
CN104550624A (en) * 2013-10-22 2015-04-29 中国第一重型机械股份公司 Near-net forming forging method of integrated bottom head of nuclear reactor pressure vessel
CN104842122A (en) * 2014-02-13 2015-08-19 苏州银涛精密锻造有限公司 Conducting rod forge forming process
CN109513865A (en) * 2018-11-13 2019-03-26 上海电气上重铸锻有限公司 Forging forming method with side neck water chamber head
CN109822027A (en) * 2019-02-28 2019-05-31 二重(德阳)重型装备有限公司 The forging and molding mold and forging method of the integrated end socket of nuclear power
CN110434262A (en) * 2019-08-12 2019-11-12 中国第一重型机械股份公司 End sealing plate blank forging forging method
CN111482544A (en) * 2020-04-14 2020-08-04 中国原子能科学研究院 Manufacturing method of steam generator forging for sodium-cooled fast reactor

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550624A (en) * 2013-10-22 2015-04-29 中国第一重型机械股份公司 Near-net forming forging method of integrated bottom head of nuclear reactor pressure vessel
CN104550624B (en) * 2013-10-22 2016-04-27 中国第一重型机械股份公司 The near-net-shape forging method of nuclear reactor pressure container integration bottom (head)
CN104842122A (en) * 2014-02-13 2015-08-19 苏州银涛精密锻造有限公司 Conducting rod forge forming process
CN104259362A (en) * 2014-10-21 2015-01-07 中国第一重型机械股份公司 Nuclear reactor integrating lower end socket integrity profiling and forging method
CN104259362B (en) * 2014-10-21 2016-01-13 中国第一重型机械股份公司 Nuclear reactor integration low head integrated profiling forging method
CN104368724A (en) * 2014-11-24 2015-02-25 二重集团(德阳)重型装备股份有限公司 Forging forming process for large thick-wall end socket with bearing and nozzle
CN104368724B (en) * 2014-11-24 2016-05-25 二重集团(德阳)重型装备股份有限公司 The large thick-wall end socket forging and forming technology of band supporting and ozzle
CN109513865A (en) * 2018-11-13 2019-03-26 上海电气上重铸锻有限公司 Forging forming method with side neck water chamber head
CN109822027A (en) * 2019-02-28 2019-05-31 二重(德阳)重型装备有限公司 The forging and molding mold and forging method of the integrated end socket of nuclear power
CN109822027B (en) * 2019-02-28 2020-03-31 二重(德阳)重型装备有限公司 Forging forming die and forging method of integrated seal head for nuclear power
CN110434262A (en) * 2019-08-12 2019-11-12 中国第一重型机械股份公司 End sealing plate blank forging forging method
CN111482544A (en) * 2020-04-14 2020-08-04 中国原子能科学研究院 Manufacturing method of steam generator forging for sodium-cooled fast reactor

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