CN104139145A - Method for forging guide horn mouth forge pieces applied to internal components of nuclear reactor - Google Patents
Method for forging guide horn mouth forge pieces applied to internal components of nuclear reactor Download PDFInfo
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- CN104139145A CN104139145A CN201410392140.8A CN201410392140A CN104139145A CN 104139145 A CN104139145 A CN 104139145A CN 201410392140 A CN201410392140 A CN 201410392140A CN 104139145 A CN104139145 A CN 104139145A
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Abstract
The invention discloses a method for forging guide horn mouth forge pieces applied to internal components of a nuclear reactor. The method mainly comprises the following steps: manufacturing a forging device, manufacturing a blank, pre-molding and molding. In the step of pre-molding, a guide column is sleeved with a pressure plate, a cylindrical blank is put in a pre-molding die, the pre-molding die is arranged on a lower anvil of a lower platform of a hydraulic press and used for upsetting and pre-molding when the lower platform moves to an upper anvil of the hydraulic press; in the step of molding, a conical punching head is arranged at an inner hole of a large-opening end of a middle blank and pressed downwards by the upper anvil of the hydraulic press; the conical punching head moves downwards along with the inner hole of the middle blank and is used for flaring and molding so as to finally obtain the guide horn mouth forge pieces. The forge pieces which are forged by the method are randomly distributed at the fiber directions, are safe and reliable, have the characteristics of high-temperature resistance, high-pressure resistance and corrosion resistance and are less in machining excess material, material-saving, short in machining cycle and low in manufacturing cost.
Description
Technical field
The invention belongs to the technical field of forging in machine-building, particularly the forging method of bell guide forging for a kind of nuclear in-pile component.
Background technology
The bell guide that nuclear in-pile component is used is a kind of shaped piece having with taper inner, to high temperature resistant, high pressure, anticorrosive, inner low defect, comprehensive mechanical property, requires very high; Bell guide classical production process is generally to adopt the mode moulding of forging solid forging, and then by boring, the inner unnecessary surplus of turning; Or adopt the mode moulding of casting; The product that the mode that employing is forged is at present produced, because forging internal fiber direction is cut off, has not only reduced its comprehensive mechanical property and service life, and because allowance is too large, needs the consumption plenty of time carry out machined, also causes waste of raw materials simultaneously; And adopt the mode moulding of casting, and there is material structure problem pockety, cause comprehensive mechanical property can not meet the manufacture requirement of pressure vessel.These two kinds of methods adopt machining removal excess metal to make at present, and machine-finish allowance is large, and the process-cycle is long, and waste of material is large, and manufacturing cost is high.
Summary of the invention
The problem that the nuclear in-pile component that the object of the invention is to forge for conventional method exists with bell guide and the feature of drawback and product self, design provides the forging method of a kind of nuclear in-pile component with bell guide forging, utilize method can make forging machine direction conformal distribute, machining allowance is little, mechanical performance and service life improve, and processing cost is low.
Technical scheme of the present invention is:
A forging method for bell guide forging for nuclear in-pile component, mainly comprises the steps:
Forging device is made: according to the shape and structure of bell guide forging, make processing preformed frock, forming frock, wherein preformed frock comprises preforming mould, pressing plate, guide pillar, and forming frock comprises shaping mould, tapered punch, limited post,
Base: the raw material ingot that adds external refining through electric furnace is heated to forging temperature and carries out repeated multiple times forging and stamping to change its structural state, seam internal flaw, and obtain annular base with drift punching, and then by common core bar drawing, be met the tubular blank of requirement
Preformed: first preforming mould is preheated to 250 ℃～350 ℃, smearing release agent, then the tubular blank through heating and after being fully incubated is put into preforming mould, again guide pillar is inserted afterwards to tubular blank endoporus, be that tubular blank is enclosed within on guide pillar, then pressing plate be enclosed within on guide pillar, preforming mould is placed on the lower anvil of hydraulic press lower platform, with lower platform, move to anvil place on hydraulic press and carry out jumping-up preformed
Moulding: obtain intermediate blank after preformed finishes, take off pressing plate and guide pillar, then preforming mould is replaced by shaping mould, intermediate blank is put into shaping mould, simultaneously, limited post is placed in the endoporus of intermediate blank bottom, tapered punch is placed on to intermediate blank big opening end endoporus place, on hydraulic press, anvil is to pressing down tapered punch, and tapered punch moves down and enlarging along intermediate blank endoporus, by intermediate blank reaming to requiring size, simultaneously, intermediate blank profile flows along shaping mould, and filling groove, finally obtains bell guide forging.
Described in forming step, first intermediate blank is heated to forging temperature, shaping mould is preheated to 250 ℃～350 ℃, smearing release agent simultaneously.
Beneficial effect of the present invention and advantage are:
Utilize method of the present invention can forging different materials, different size have a shaped piece with taper inner, its machine direction conformal distributes, safe and reliable, there are high temperature resistance, high pressure and anticorrosion properties, and machining clout is little, material saving, process-cycle is short, low cost of manufacture.
Accompanying drawing explanation
When Fig. 1 is method preformed of the present invention, preformed frock master analyses and observe (signal) figure;
When Fig. 2 is method moulding of the present invention, forming frock master analyses and observe (signal) figure;
Fig. 3 is the main cutaway view of bell guide forging;
In figure: 1-preforming mould, 2-pressing plate, 3-guide pillar, 4-tubular blank, 5-shaping mould, 6-intermediate blank, 7-tapered punch, 8-limited post, 9-bell guide forging.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, but the scope that should at this point not be interpreted as theme of the present invention only limits to following embodiment, without departing from the idea case in the present invention described above, all various modifications, replacement and changes of making according to ordinary skill knowledge and customary means, include within the scope of the invention.
As shown in Figures 1 to 3, the forging method of bell guide forging for a kind of nuclear in-pile component,
Mainly comprise the steps:
Forging device is made: according to the shape and structure of bell guide forging 9, make processing preformed frock, forming frock, wherein preformed frock comprises preforming mould 1, pressing plate 2, guide pillar 3, and forming frock comprises shaping mould 5, tapered punch 7, limited post 8; The die cavity top of preforming mould 1 is half horn mouth shape, die cavity bottom is back taper cylindrical shape, pressing plate 2 is loop configuration, guide pillar 3 is cylinder, the length of guide pillar 3 is greater than the height of tubular blank 4, the cavity shape of described shaping mould 5 is identical with the external shape of bell guide forging 9, and the external shape of tapered punch 7 is identical with the horn mouth interior shape of bell guide forging 9, and limited post 8 is cylinder;
Base: the raw material ingot that adds external refining through electric furnace is heated to forging temperature and carries out repeated multiple times forging and stamping to change its structural state, seam internal flaw, and obtain annular base with drift punching, and then by common core bar drawing, be met the tubular blank 4 of requirement;
Preformed: first preforming mould 1 is preheated to 250 ℃～350 ℃, smearing release agent, then the tubular blank 4 through heating and after being fully incubated is put into preforming mould 1, again guide pillar 3 is inserted to tubular blank 4 endoporus afterwards, be that tubular blank 4 is enclosed within on guide pillar 3, then pressing plate 2 is enclosed within on guide pillar 3, preforming mould 1 is placed on the lower anvil of hydraulic press lower platform, moves to anvil place on hydraulic press carry out jumping-up preformed with lower platform;
Moulding: obtain intermediate blank 6 after preformed finishes, take off pressing plate 2 and guide pillar 3, then preforming mould 1 is replaced by shaping mould 5, intermediate blank 6 is put into shaping mould 5, simultaneously, limited post 8 is placed in the endoporus of intermediate blank 6 bottoms, tapered punch 7 is placed on to intermediate blank 6 big opening end endoporus places, on hydraulic press, anvil is to pressing down tapered punch 7, and tapered punch 7 moves down and enlarging along intermediate blank 6 endoporus, by intermediate blank 6 reamings to requiring size, simultaneously, intermediate blank 6 profiles flow along shaping mould, and filling groove, finally obtains bell guide forging 9.
Described in forming step, if the temperature of intermediate blank 6 during lower than the forging temperature of material, should first be heated to forging temperature by intermediate blank 6, shaping mould 5 is preheated to 250 ℃～350 ℃ simultaneously, smearing release agent, to guarantee the forgeability of material, promotes forging quality.
Described bell guide forging 9 is steel matter, and described forging temperature is 850 ℃～1180 ℃, and the present invention is except can forging steel matter, and forging that also can other material of forging is as aluminium alloy, titanium alloy, copper alloy etc.
The material of described bell guide forging 9 is Z2CN19-10+N2 stainless steel, described forging temperature is 850 ℃～1120 ℃, bell guide forging 9 machine direction conformals distribute more even, the mechanical performance index of forging is (as tensile strength, elongation after fracture etc.) than conventional method, improve 5-10%, forging is more safe and reliable, and there is good high temperature resistance, high pressure and anticorrosion properties, in addition, due to the difference of each field to the requirement of forging crystal grain size, in actual forging process, crystal grain size is required to low forging, its final forging temperature can be controlled in 900 ℃-950 ℃, to obtain good material forging deformation performance, and crystal grain is required to the forging of refinement, its final forging temperature general control is 850 ℃ of-880 ℃ of left and right, with the forging coarse grains that prevents from causing because final forging temperature is too high.
Claims (4)
1. a forging method for bell guide forging for nuclear in-pile component, is characterized in that mainly comprising the steps:
Forging device is made: according to the shape and structure of bell guide forging (9), make processing preformed frock, forming frock, wherein preformed frock comprises preforming mould (1), pressing plate (2), guide pillar (3), forming frock comprises shaping mould (5), tapered punch (7), limited post (8)
Base: the raw material ingot that adds external refining through electric furnace is heated to forging temperature and carries out repeated multiple times forging and stamping to change its structural state, seam internal flaw, and obtain annular base with drift punching, and then by common core bar drawing, be met the tubular blank (4) of requirement
Preformed: first preforming mould (1) is preheated to 250 ℃～350 ℃, smearing release agent, then the tubular blank (4) through heating and after being fully incubated is put into preforming mould (1), again guide pillar (3) is inserted to tubular blank (4) endoporus afterwards, be that tubular blank (4) is enclosed within on guide pillar (3), then pressing plate (2) is enclosed within on guide pillar (3), preforming mould (1) is placed on the lower anvil of hydraulic press lower platform, with lower platform, move to anvil place on hydraulic press and carry out jumping-up preformed
Moulding: obtain intermediate blank (6) after preformed finishes, take off pressing plate (2) and guide pillar (3), then preforming mould (1) is replaced by shaping mould (5), intermediate blank (6) is put into shaping mould (5), simultaneously, limited post (8) is placed in the endoporus of intermediate blank (6) bottom, tapered punch (7) is placed on to intermediate blank (6) big opening end endoporus place, on hydraulic press, anvil is to pressing down tapered punch (7), tapered punch (7) moves down and enlarging along intermediate blank (6) endoporus, by intermediate blank (6) reaming to requiring size, simultaneously, intermediate blank (6) profile flows along shaping mould, filling groove, finally obtain bell guide forging (9).
2. the forging method of bell guide forging for nuclear in-pile component according to claim 1, it is characterized in that in forming step, first intermediate blank (6) is heated to forging temperature, shaping mould (5) is preheated to 250 ℃～350 ℃, smearing release agent simultaneously.
3. the forging method of bell guide forging for nuclear in-pile component according to claim 1 and 2, is characterized in that described bell guide forging (9) is for steel matter, and described forging temperature is 850 ℃～1180 ℃.
4. the forging method of bell guide forging for nuclear in-pile component according to claim 1 and 2, the material that it is characterized in that described bell guide forging (9) is Z2CN19-10+N2 stainless steel, described forging temperature is 850 ℃～1120 ℃.
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| CN201410392140.8A CN104139145A (en) | 2014-08-11 | 2014-08-11 | Method for forging guide horn mouth forge pieces applied to internal components of nuclear reactor |
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| CN201410392140.8A CN104139145A (en) | 2014-08-11 | 2014-08-11 | Method for forging guide horn mouth forge pieces applied to internal components of nuclear reactor |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033142A (en) * | 2015-07-10 | 2015-11-11 | 河南光大管业有限公司 | Pressing die and pressing process for welding neck flange |
| CN105458137A (en) * | 2015-12-25 | 2016-04-06 | 太原科技大学 | Thermal broaching device capable of improving rigidity of mandrel |
| CN105935732A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Embryo mold forging process for forge piece with holes in step at one end |
| CN106141049A (en) * | 2016-08-31 | 2016-11-23 | 无锡派克新材料科技股份有限公司 | Small-bore steep-taper taper annular element forging and forming technology |
| CN110586831A (en) * | 2019-09-06 | 2019-12-20 | 江苏圣贤锻造有限责任公司 | Die assembly for forging oblique connecting pipe and forging method |
| CN112139416A (en) * | 2020-09-18 | 2020-12-29 | 上海电气上重铸锻有限公司 | Preparation method and die of extra-large-size special-shaped ring forging with outer steps |
| CN112589028A (en) * | 2020-11-30 | 2021-04-02 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN112621135A (en) * | 2020-12-23 | 2021-04-09 | 河北亿利康纳利亚环保科技有限公司 | Post-treatment non-guide die carrier packaging process |
| CN112974698A (en) * | 2021-02-07 | 2021-06-18 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Journal die forging method for aeroengine |
| CN113070432A (en) * | 2021-01-25 | 2021-07-06 | 黄小六 | Novel horn-shaped forging thixoforging device and process thereof |
| CN114178781A (en) * | 2021-10-13 | 2022-03-15 | 贵州航天精工制造有限公司 | Method for manufacturing gasket fixing clamp for reactor pressure vessel |
| CN114182067A (en) * | 2021-12-14 | 2022-03-15 | 重庆新承航锐科技股份有限公司 | Forging and heat treatment method for martensite heat-resistant stainless steel special-shaped forge piece |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033142A (en) * | 2015-07-10 | 2015-11-11 | 河南光大管业有限公司 | Pressing die and pressing process for welding neck flange |
| CN105458137A (en) * | 2015-12-25 | 2016-04-06 | 太原科技大学 | Thermal broaching device capable of improving rigidity of mandrel |
| CN105935732A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Embryo mold forging process for forge piece with holes in step at one end |
| CN106141049A (en) * | 2016-08-31 | 2016-11-23 | 无锡派克新材料科技股份有限公司 | Small-bore steep-taper taper annular element forging and forming technology |
| CN106141049B (en) * | 2016-08-31 | 2018-06-08 | 无锡派克新材料科技股份有限公司 | Small-bore steep-taper taper annular element forging and forming technology |
| CN110586831B (en) * | 2019-09-06 | 2024-05-07 | 江苏圣贤锻造有限责任公司 | Die assembly for forging miter pipe and forging method |
| CN110586831A (en) * | 2019-09-06 | 2019-12-20 | 江苏圣贤锻造有限责任公司 | Die assembly for forging oblique connecting pipe and forging method |
| CN112139416A (en) * | 2020-09-18 | 2020-12-29 | 上海电气上重铸锻有限公司 | Preparation method and die of extra-large-size special-shaped ring forging with outer steps |
| CN112589028A (en) * | 2020-11-30 | 2021-04-02 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN112621135A (en) * | 2020-12-23 | 2021-04-09 | 河北亿利康纳利亚环保科技有限公司 | Post-treatment non-guide die carrier packaging process |
| CN113070432A (en) * | 2021-01-25 | 2021-07-06 | 黄小六 | Novel horn-shaped forging thixoforging device and process thereof |
| CN112974698A (en) * | 2021-02-07 | 2021-06-18 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Journal die forging method for aeroengine |
| CN114178781A (en) * | 2021-10-13 | 2022-03-15 | 贵州航天精工制造有限公司 | Method for manufacturing gasket fixing clamp for reactor pressure vessel |
| CN114178781B (en) * | 2021-10-13 | 2024-03-01 | 贵州航天精工制造有限公司 | Method for manufacturing gasket fixing clamp for reactor pressure vessel |
| CN114182067A (en) * | 2021-12-14 | 2022-03-15 | 重庆新承航锐科技股份有限公司 | Forging and heat treatment method for martensite heat-resistant stainless steel special-shaped forge piece |
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Application publication date: 20141112 |