CN102248047A - Combined mandrel used for die-pressing of elbow tube and application method thereof - Google Patents
Combined mandrel used for die-pressing of elbow tube and application method thereof Download PDFInfo
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- CN102248047A CN102248047A CN2011101458028A CN201110145802A CN102248047A CN 102248047 A CN102248047 A CN 102248047A CN 2011101458028 A CN2011101458028 A CN 2011101458028A CN 201110145802 A CN201110145802 A CN 201110145802A CN 102248047 A CN102248047 A CN 102248047A
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Abstract
The invention discloses a combined mandrel used for die-pressing of an elbow tube, which can be integrally and directly loaded in a tube blank, and an application method thereof. The combined mandrel comprises a plurality of mandrel units each of which has an upper mandrel and a lower mandrel, which are arranged in a pair, and a wedge assembled between the upper mandrel and the lower mandrel. The mandrel units are axially arranged in the pipeline of the tube blank to fill in the tube blank during the die-press forming process, at least a part of the mandrel units are elbow tube section mandrel units, a gap is formed between the upper mandrel in each elbow tube section mandrel unit and an adjacent upper mandrel so that the two upper mandrels are closed to each other with the bending deformation of the tube blank, axial through-holes are formed on both the upper and the lower mandrels of each mandrel unit and used for mounting support columns, and the mandrel units are serially connected through the individual support columns and then combined with anti-falling members to form an integral body which can be axially loaded into the tube blank. The combined mandrel does not need to be assembled in the tube by workers, has the advantage of being convenient to be loaded in the tube blank, and is not restricted by the limitation of inside diameter of the tube blank.
Description
Technical field
The present invention relates to a kind of brake forming core of high-quality bending dies such as third generation nuclear power plant reactor main pipe hot leg, cold section and voltage-stablizer fluctuation pipe and using method of this core of being mainly used in.In addition, this core also can be widely used in the manufacturing field of other high-quality bend pipes.
Background technology
The total installation of generating capacity of the present nuclear power of China is less than 1,000 ten thousand kilowatts, and delivery is about 2% of national total electricity.Development plan according to National Development and Reform Committee, to the year two thousand twenty, China's nuclear power total installation of generating capacity will reach average level in the world, promptly will account for 16% of national total installed capacity of electricity capacity, just in following 10 years, China also will build up about 100 million kilowatt nuclear power stations.The development type is exactly the newly-designed third generation AP1000 of a US Westinghouse company pressurized-water reactor nuclear power plant.11 AP1000 nuclear power stations year also will be gone up by the U.S. to 2015.
The advanced large-scale AP1000 pressurized-water reactor nuclear power plant of the newly-designed third generation of US Westinghouse company, be at present in the world two generation nuclear power station and two generations add the update type of nuclear power station.Its major advantage have service life from before be increased to 60 years in 40 years, the installed capacity of single seat nuclear power station reaches 1,250,000 kilowatts.The AP1000 of Westinghouse Electric reactor is not also being built unit at present, and China takes the lead in starting this type.The main pipe hot leg of this type, cold section and voltage-stablizer fluctuation pipe are to add the nitrogen ultra-low carbon austenitic stainless steel elbow, technical indicators such as the ovality of bend pipe, attenuate amount have been proposed very high requirement, manufacture method routinely can not meet the demands at all, manufacture difficulty is very big, is rated as world-class technical barrier.
By the application's applicant application, Granted publication has been number for the patent of invention of CN100564981C (calling reference paper in the following text) discloses a kind of hot segment of bent pipe of main pipeline of reactor and manufacture method thereof, proposed to come in the mode of compression molding the technological means of the sweep of moulding body.Simultaneously, the concrete structure of the core that has been adopted when also further disclosing the mold pressing bend pipe in the specification of this reference paper, can be summarized as: comprise a plurality of by a pair of core and the following core gone up, be assemblied in the core unit that chock constituted between the core and following core on this, during compression molding, thereby these core unit are arranged in the pipeline of pipe vertically it is filled (reference paper also indicated core filling rate should greater than 95%), according to residing position in pipe, each core unit, these core unit are divided into straight length core unit and bend loss core unit again, and (straight length core unit is filled in the straight-tube portion after the pipe bending, bend loss core unit is filled in the sweep of pipe, when after the pipe bending during no straight length, then each core unit is bend loss core unit), have between the last core that last core in each bend loss core unit is adjacent and make these two to go up space that cores draw close mutually with the flexural deformation of pipe (though reference paper does not spell out the existence in " space ", but as can be known according to general knowledge known in this field, because its inner arc metal was compressed when pipe was crooked, must also want relative motion between the Dui Ying last core with it, have only the existence in " space " just can make the space that produces relative motion between the core, therefore " space " this technical characterictic is implicit open in reference paper).In addition, the improvement structure of core under reference paper also further discloses in the bend loss core unit.
Yet reference paper does not relate to pack into the concrete grammar of pipe of core.In fact, such as this need of reference paper compression molding being installed in large-scale pipeline often all is directly to creep into the assembling of carrying out core in the pipeline by the workman with the occasion of core.This mode is inefficiency not only, but also is subjected to the restriction of pipe internal diameter, and the workman can't enter pipeline construction when the pipe internal diameter is too small.
Summary of the invention
The present invention aims to provide a kind of composite core formwork that is used for the mold pressing bend pipe of the pipe of can whole directly packing into.
For this reason, this composite core formwork comprises a plurality of by a pair of core and the following core gone up, be assemblied in the core unit that chock constituted between the core and following core on this, thereby these core unit are arranged in vertically in the pipeline of pipe it are filled during compression molding, the core unit of at least a portion is bend loss core unit, have between the last core that last core in each bend loss core unit is adjacent and make these two to go up the space that core is drawn close mutually with the flexural deformation of pipe, the last core of described each core unit reaches down and is equipped with the axially extending bore that is used to assemble support column on the core, and described each support column can be with after these core cell string and through preventing deviating from the integral body that member is combined into the pipe of can axially packing into.
It is pointed out that attribute contained in said herein " go up core " and " the following core " " on ", D score, should be corresponding to the upper die and lower die in the compression molding mould.To this, can make an explanation in conjunction with disclosed content in the reference paper.
Need to prove that at this present invention gets rid of the technical scheme of using steel wire rope to substitute support column especially.This be because, support column is a rigid element, come the connection-core form unit with support column after formed integral body can not bend, and can be good at controlling whole diameter, thus follow-up pack into during pipe not can and pipe between interfere.
Wherein, if only establish an axially extending bore on the core on each, then this axially extending bore preferably passes through the center of gravity of core on this; If establish two or more axially extending bores on the core on this, then these axially extending bores preferably are symmetrically distributed on this on core with the axis shaft through this center of gravity.Same, if only establish an axially extending bore on each time core, then this axially extending bore preferably passes through the center of gravity of this time core; If establish two or more axially extending bores on this time core, then these axially extending bores preferably are symmetrically distributed on this time core with the axis shaft through this center of gravity.Obviously, if only establish an axially extending bore, then finally can only core on each (perhaps core under each) polyphone be got up by a support column; If establish two or more axially extending bores, then finally can core on each (perhaps core under each) polyphone be got up by the support column of respective numbers.No matter still be symmetrically distributed through center of gravity when axially extending bore, can both reduce the suffered radial load of support column as far as possible, both can prevent the damage of support column, can be convenient to again simultaneously follow-up support column be extracted out from core with axis shaft through this center of gravity.
Describedly prevent deviating from member and can be constituted by supporting plate that is connected with the head of each support column and the securing member that this supporting plate is clamped on the described whole front end face.Contained attribute " preceding " in said " front end face ", should be with described integral shaft to the direction of the pipe of packing into as reference.Obviously, those skilled in the art also can conspicuously design the other forms of member of preventing deviating from, and its purpose prevents that all core from deviating from from support column.
As to further improvement in the technical proposal, following core in each bend loss core unit is divided under the convex core under the core and matrix again, interlaced arrangement between the core under core and the matrix under these convexs, be respectively equipped with projection on two of core end faces under the described convex, be respectively equipped with groove on two of core end faces under the described matrix, the groove on projection on each time core and the adjacent core down is suitable.Adopt this design, the one, whole core is played circumferential positioning action, relatively moving of circumferencial direction can not take place in parts adjacent in the promptly whole core; The 2nd, in forming process, do not break away from plane contact under the adjacent convex under core and the matrix between the core, make the axial arc of bend pipe after the moulding good, there is not ring sample defective, promptly surfacing is smooth.
In addition, the present invention also provides the above-mentioned using method that is used for the composite core formwork of mold pressing bend pipe, specifically may further comprise the steps:
A, each core unit combination one-tenth is whole;
B, with pipeline and the axial location of described integral shaft to the pipe of packing into;
C, shed to prevent deviating from and extract each support column behind the member out, each core unit was put and was stayed in pipe this moment;
D, pipe is carried out compression molding;
Take out each core unit after e, the moulding.
As to these further improvements in methods, many groups also are installed on the whole vertically embrace circle, when packing integral body into pipe vertically, when any one armful circle arrives the pipe rear end face, continue again to pack into behind this armful of removal circle.Attribute " back " in said herein " rear end face " is still with described integral shaft to the direction of the pipe of packing into as reference.Embracing circle can hold described overall radial tightly, thereby helps packing into of core.
In addition, in step b, integral body vertically can be hung in pipe and rely on following mode axial location in pipe: on the front end face of pipe, support ring is installed, this support ring has the through hole of an internal diameter less than the pipe internal diameter, thereby promptly forms the step that can hold whole front end face load onto the front end face of pipe when support ring after; When integral shaft when hanging in pipe, thereby contact axial location with described step when the front end face of integral body.Contained attribute " preceding " in said herein " front end face ", equally with described integral shaft to the direction of the pipe of packing into as reference.
The invention has the beneficial effects as follows: this composite core formwork proposed by the invention need not to be assembled in pipe by the workman, has the advantage of the pipe of being convenient to pack into, has also overcome the restriction of pipe internal diameter simultaneously.
Description of drawings
Fig. 1 is the structural representation of the application's composite core formwork.
Fig. 2 is the working state figure of the application's composite core formwork when packing pipe into.
Fig. 3 is the working state figure of the application's composite core formwork after pack into pipe and axial location.
Fig. 4 is for preventing deviating from member and the structural representation of composite core formwork axial location when pipe in the application's composite core formwork.
Fig. 5 goes to prevent deviating from member, extracts each core unit behind each support column out and put the working state figure that stays when the pipe for the application.
Fig. 6 is for including the fragmentary, perspective view of bend loss core cell mesh among Fig. 5.
Arrow among Fig. 2 is represented the direction of described integral shaft to the pipe of packing into.
Arrow among Fig. 4 is represented the extraction direction of each support column.
Be labeled as among the figure: whole 1, suspension ring 2, chock 3, support column 4, last core 5 in the first straight length core unit, last core 6 in the bend loss core unit, space 7, embrace circle 8, last core 9 in the second straight length core unit, supporting plate 10, following core 11 in the first straight length core unit, core 12 under the convex, core 13 under the matrix, following core 14 in the second straight length core unit, cable wire 15, pipe 16, support ring 17, securing member 18, step 19, through hole 20, groove 21, projection 22, axially extending bore 23.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further detailed.
Shown in Fig. 1～6, whole 1 two ends are respectively the first straight length core unit and the second straight length core unit, between the first straight length core unit and the second straight length core unit, be arranged with a plurality of bend loss cores unit, be equipped with chock 3 between the following core 11 in the last core 5 in the first straight length core unit and the first straight length core unit, be equipped with chock 3 equally between the following core 14 in the last core 9 in the second straight length core unit and the second straight length core unit, also all be equipped with chock 3 between the last core 6 of each bend loss core unit and the following core, no matter be each straight length core unit or each bend loss core unit, the effect of chock 3 is all identical, i.e. axially-movable by this chock 3 can make the last core in the respective core form unit and descend the core radial motion, throws off in pipe 16 or with pipe 16 inwalls with following core swelling so that go up core; In addition, also has the space 7 that these two last cores are drawn close mutually with the flexural deformation of pipe 16 between the last core that the last core 6 in each bend loss core unit is adjacent.Foregoing is understood can be in conjunction with reference paper.
On this basis, as Fig. 1, Fig. 4 and shown in Figure 6, the last core of each core unit (comprising straight length core unit and bend loss core unit) reaches down and is respectively equipped with the axially extending bore 23 that is used to assemble support column 4 on the core, thereby described each support column 4 penetrates on each core unit corresponding axially extending bore 23 respectively with these core cell string, the front end of each support column 4 is processed with screw thread and links to each other with nut after passing the second straight length core unit, clamp supporting plate 10 between the front end face of the nut and the second straight length core unit (being whole 1 front end face), the rear end of each support column 4 is positioned at the outside of the first straight length core unit and suspension ring 2 is installed.
As Fig. 1 and shown in Figure 6, can only establish an axially extending bore 23 on the core on each, then this axially extending bore 23 preferably passes through the center of gravity of core on this; Should go up on core and also can establish two or more axially extending bores 23, then these axially extending bores 23 preferably are symmetrically distributed on this on core with the axis shaft through this center of gravity.Same, can only establish an axially extending bore 23 on each time core, then this axially extending bore 23 preferably passes through the center of gravity of this time core; Also can establish two or more axially extending bores 23 on this time core, then these axially extending bores 23 preferably are symmetrically distributed on this time core with the axis shaft through this center of gravity.
Obviously, if only establish an axially extending bore 23, then finally can only core on each (perhaps core under each) polyphone be got up by a support column; If establish two or more axially extending bores 23, then finally can core on each (perhaps core under each) polyphone be got up by the support column 4 of respective numbers.No matter still be symmetrically distributed through centers of gravity when axially extending bore 23, can both reduce the suffered radial load of support column 4 as far as possible, both can prevent the damage of support column 4, can be convenient to again simultaneously follow-up support column 4 be extracted out from core with axis shaft through this center of gravity.
As Fig. 1 and shown in Figure 6, following core in each bend loss core unit is divided under the convex core 13 under the core 12 and matrix again, interlaced arrangement between the core 13 under core 12 and the matrix under these convexs, be respectively equipped with projection 22 on two of core 12 end faces under the described convex, be respectively equipped with groove 21 on two of core 13 end faces under the described matrix, the projection 22 on each time core is suitable with the groove 21 on the adjacent core down.
Because during pipe 16 bendings, the inner arc metal of sweep is compressed and the outer arc metal is stretched, accordingly, will motion disconnected from each other between the following core in each bend loss core unit along with the stretching of pipe 16 outer arc metals, and will draw close mutually along with the compression of pipe 16 inner arc metals between the last core 6 in each bend loss core unit.Because the following core in each bend loss core unit is divided under the convex core 13 under the core 12 and matrix, have suitable projection 22 and groove 21 between them, when between the following core in the bend loss core unit during motion disconnected from each other, to not break away from plane contact between the core 13 under core 12 and the matrix under the adjacent convex, make the axial arc of bend pipe after the moulding good, do not have ring sample defective, promptly surfacing is smooth.Simultaneously, this structure also plays whole core is played circumferential positioning action, and parts adjacent in the promptly whole core relatively moving of circumferencial direction can not taken place.
Shown in Fig. 1～5, the using method step of this composite core formwork is: a, each core unit combination is become whole 1, many groups also are installed on whole 1 then vertically embrace circle 8; B, hang suspension ring 2 respectively with cable wire 15, thereby vertically hang in the pipeline of pipe 16 described whole 1, when hanging in, when any one armful circle 8 arrives pipe 16 rear end faces, continue again to pack into behind this armful of removal circle 8, and finally rely on following mode axial location in pipe 16: support ring 17 is installed on the front end face of pipe 16, this support ring 17 has the through hole 20 of an internal diameter less than pipe 16 internal diameters, thereby promptly forms the step 19 that can hold whole 1 front end face load onto the front end face of pipe 16 when support ring 17 after; When whole 1 axially hangs in pipe 16, thereby contact axial location with described step 19 when whole 1 front end face.C, shed supporting plate 10 back and extract each support column 4 out, each core unit was put and was stayed in pipe 16 this moment; D, pipe 16 is carried out compression molding; Take out each core unit after e, the moulding.
Claims (7)
1. the composite core formwork that is used for the mold pressing bend pipe, comprise a plurality of by a pair of core and the following core gone up, be assemblied in the core unit that chock (3) between the core and following core is constituted on this, during compression molding these core unit be arranged in pipe (16) vertically thus pipeline in it is filled, the core unit of at least a portion is bend loss core unit, have between the last core that last core (6) in each bend loss core unit is adjacent and make these two to go up the space (7) that core is drawn close mutually with the flexural deformation of pipe (16), it is characterized in that: the last core of described each core unit reaches down and is respectively equipped with the axially extending bore (23) that is used to assemble support column (4) on the core, and described each support column (4) can be with after these core cell string and through preventing deviating from the integral body (1) that member is combined into pipe (16) of can axially packing into.
2. the composite core formwork that is used for the mold pressing bend pipe as claimed in claim 1 is characterized in that: described on each the axially extending bore (23) on the core go up the center of gravity of core through this or be symmetrically distributed on this on core with the axis shaft of passing through this center of gravity; Axially extending bore (23) on described each time core is symmetrically distributed on this time core through the center of gravity of this time core or with the axis shaft through this center of gravity.
3. the composite core formwork that is used for the mold pressing bend pipe as claimed in claim 1 is characterized in that: describedly prevent deviating from the supporting plate (10) that member is connected by the head with each support column (4) and the securing member (18) that this supporting plate (10) is clamped on described integral body (1) front end face is constituted.
4. as claim 1, the 2 or 3 described composite core formwork that are used for the mold pressing bend pipe, it is characterized in that: the following core in each bend loss core unit is divided into core (13) under core under the convex (12) and the matrix again, interlaced arrangement between the core (13) under core under these convexs (12) and the matrix, be respectively equipped with projection (22) on two end faces of core under the described convex (12), be respectively equipped with groove (21) on two end faces of core under the described matrix (13), the groove (21) on projection on each time core (22) and the adjacent core down is suitable.
5. claim 1,2, the 3 or 4 described usings method that are used for the composite core formwork of mold pressing bend pipe may further comprise the steps:
A, each core unit combination is become whole (1);
B, with described integral body (1) axially pack into the pipeline and the axial location of pipe (16);
C, shed to prevent deviating from and extract each support column (4) behind the member out, each core unit was put and was stayed in pipe (16) this moment;
D, pipe (16) is carried out compression molding;
Take out each core unit after e, the moulding.
6. the using method that is used for the composite core formwork of mold pressing bend pipe as claimed in claim 5, it is characterized in that: many groups also are installed on whole (1) vertically embrace circle (8), when packing integral body (1) into pipe (16) vertically, when any one armful circle (8) arrives pipe (16) rear end face, continue again to pack into behind this armful of removal circle (8).
7. as claim 5 or the 6 described usings method that are used for the composite core formwork of mold pressing bend pipe, it is characterized in that: in step b, whole (1) is vertically hung in pipe (16) and relies on following mode axial location in pipe (16): support ring (17) is installed on the front end face of pipe (16), this support ring (17) has the through hole (20) of an internal diameter less than pipe (16) internal diameter, thereby promptly forms the step (19) that can hold integral body (1) front end face load onto the front end face of pipe (16) when support ring (17) after; When whole (1) axially hangs in pipe (16), when the front end face of whole (1) with described step (19) thus contact axial location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101458028A CN102248047A (en) | 2011-06-01 | 2011-06-01 | Combined mandrel used for die-pressing of elbow tube and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101458028A CN102248047A (en) | 2011-06-01 | 2011-06-01 | Combined mandrel used for die-pressing of elbow tube and application method thereof |
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| CN102248047A true CN102248047A (en) | 2011-11-23 |
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| CN2011101458028A Pending CN102248047A (en) | 2011-06-01 | 2011-06-01 | Combined mandrel used for die-pressing of elbow tube and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052079A (en) * | 2017-05-09 | 2017-08-18 | 四川三洲川化机核能设备制造有限公司 | A kind of forming method of the short radius high temperature alloy elbow of heavy caliber thick wall |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244443A (en) * | 2008-03-27 | 2008-08-20 | 二重集团（德阳）重型装备股份有限公司 | Combined shaping mold |
| JP2009190043A (en) * | 2008-02-12 | 2009-08-27 | Press Kogyo Co Ltd | Structural member |
| CN101745782A (en) * | 2008-12-22 | 2010-06-23 | 二重集团（德阳）重型装备股份有限公司 | Method for manufacturing hot segment of bent pipe of main pipeline of reactor |
| CN201579385U (en) * | 2009-11-04 | 2010-09-15 | 戴光荣 | Combined iron casting die |
| CN202114114U (en) * | 2011-06-01 | 2012-01-18 | 二重集团（德阳）重型装备股份有限公司 | Combined mandrel for die pressing bending pipe |
-
2011
- 2011-06-01 CN CN2011101458028A patent/CN102248047A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009190043A (en) * | 2008-02-12 | 2009-08-27 | Press Kogyo Co Ltd | Structural member |
| CN101244443A (en) * | 2008-03-27 | 2008-08-20 | 二重集团（德阳）重型装备股份有限公司 | Combined shaping mold |
| CN101745782A (en) * | 2008-12-22 | 2010-06-23 | 二重集团（德阳）重型装备股份有限公司 | Method for manufacturing hot segment of bent pipe of main pipeline of reactor |
| CN201579385U (en) * | 2009-11-04 | 2010-09-15 | 戴光荣 | Combined iron casting die |
| CN202114114U (en) * | 2011-06-01 | 2012-01-18 | 二重集团（德阳）重型装备股份有限公司 | Combined mandrel for die pressing bending pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052079A (en) * | 2017-05-09 | 2017-08-18 | 四川三洲川化机核能设备制造有限公司 | A kind of forming method of the short radius high temperature alloy elbow of heavy caliber thick wall |
| CN107052079B (en) * | 2017-05-09 | 2018-08-28 | 四川三洲川化机核能设备制造有限公司 | A kind of forming method of heavy caliber thick wall short radius high temperature alloy elbow |
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Application publication date: 20111123 |