CN100563865C - Combined shaping mold - Google Patents
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- CN100563865C CN100563865C CNB2008103007399A CN200810300739A CN100563865C CN 100563865 C CN100563865 C CN 100563865C CN B2008103007399 A CNB2008103007399 A CN B2008103007399A CN 200810300739 A CN200810300739 A CN 200810300739A CN 100563865 C CN100563865 C CN 100563865C
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Abstract
The invention discloses a kind of combined shaping mold that is used to make bend pipe, can satisfy the high bend pipe of morpheme dimensional requirement and make requirement.This combined shaping mold comprises upper die and lower die and core, and core adopts metal to make, and core is filled the filling rate in space in the body greater than 95%.This mould not only can satisfy the specification requirement that the high bend pipe of morpheme dimensional requirement is made, compare with mach this type of bend pipe simultaneously, the metal structure of its body and performance can obtain more effectively guaranteeing, also reduced the machined difficulty simultaneously, the metal cutting amount is few, blank weight reduces, the crooked position out-of-roundness of bend pipe, crooked back of the body arc attenuate amount, nominal wall thickness, minimum wall thickness (MINI W.) etc. can both well guarantee, also can reduce the ring and the gauffer phenomenon of crooked position simultaneously, can be widely used in various making the high bend pipe of morpheme dimensional requirement.
Description
Technical field
The present invention relates to a kind of mould of making bend pipe, especially relate to a kind of combined shaping mold that is used to make the high bend pipe of morpheme dimensional requirement.
Background technology
Along with development of technology, in some great engineerings, need to make the high parts of some morpheme dimensional requirements, hot segment of bent pipe of main pipeline etc. in the advanced large-scale AP1000 pressurized-water reactor nuclear power plant of for example newly-designed third generation.It is integrated that this hot segment of bent pipe of main pipeline makes stainless steel monobloc forging band ozzle into by original stainless steel segmentation foundry goods (straight tube adopts centrifugal casting and elbow to adopt conventional cast) welding, and straight tube, elbow, the nozzle design of segmentation become integrated forging, strengthened the difficulty of making.The AP1000 reactor is not also being built unit at present, China takes the lead in starting this type, and hot segment of bent pipe of main pipeline also requires to be the monobloc forging formula and to be with ozzle, because of complex-shaped, manufacture difficulty is very big, and the fabrication scheme that provides is that the method with machining processes after the solid forging.The required stainless steel ingot of forging reaches 150 tons, and pipe orifice almost is difficult to process with the method for machinery, and the tissue of forging and performance also are difficult to guarantee.
The AP1000 hot segment of bent pipe of main pipeline all also there is not ripe manufacturing technology both at home and abroad at present, it is super-low carbon stainless steel heavy forging (316LN), therefore similar products like in the world all seldom, all has more technological difficulties on operations such as smelting, forging, brake forming, machined.Hot leg elbow one end length of straight pipe 2235mm, other end length of straight pipe 1234mm, the centre is the 1.5D bend radius bent pipe, and two integrated ozzles is being arranged shown in Fig. 1～4 near the crooked position place.The external diameter of this hot leg elbow is 952.5mm, and internal diameter is 787.4mm, and the angle of bend of bending section is 56.4 °, and its specification requirement is: crooked position out-of-roundness≤4%, crooked back of the body arc attenuate amount≤12.5%, nominal wall thickness 82.55mm, minimum wall thickness (MINI W.) 72.2mm.
The technological difficulties of above-mentioned hot leg elbow machine-shaping are:
1, bending radius is the bending of 1.5D two ends band straight tube.
The bending radius of elbow is 1D～1.5D, and straight length is not with at two ends, and bend pipe just is with straight length.The manufacturing process of elbow has two kinds, and the one, compression moulding, the 2nd, pick the type of making.The manufacturing process of bend pipe is the Frequency Induction Heating bend pipe, the bending radius of bend pipe is general 〉=and 3D, if bending radius is less than 3D, the ovality of crooked position and attenuate amount can fiercely increase, when bending radius was 1.5D, the attenuate amount of bend pipe back of the body arc was up to 25%, and ovality ≈ 15%.
The compression molding elbow, the contour shape of its blank is trapezoidal.The trapezoidal bottom edge lengths is the length of run of the outer camber line of elbow, and trapezoidal top margin length is the length of run of camber line in the elbow.During brake forming, blank brake forming under the effect of interior external mold.Figure 10 is a 1.5D major radius elbow compression moulding schematic diagram, and Figure 11 is 1.5D major radius elbow blank figure.Shown in Figure 10 is the conventional process of elbow compression moulding, this bend pipe mode, and the filling rate that its core is filled space in the body generally has only about 80%, and the filling rate here is core volume and the ratio of managing interior spatial volume.Therefore, the ovality of product crooked position is nearly 15%, because the gap between the bending section core is bigger, ring and gauffer appear in the crooked position of bend pipe easily simultaneously.
Behind the two sideband straight tubes, blank just can not be made into trapezoidal, can only make the straight tube shape.The inner arc metal can only compress when crooked, and the outer arc metal can only stretch, and when not taking measures, the attenuate of outer arc is up to 33%.Therefore, the crooked difficulty of the bend pipe of two ends band straight tube and radius of curvature R=1.5D is very big.
2, have two ozzles respectively near the crooked position place.
After ozzle and bend pipe are integrated, increased great difficulty for the design of compacting tool set, and the metal at ozzle position can not get even compression in when making moulding, asymmetric outer tube mouth steric hindrance has been ended when stretching flowing of metal and has been replenished.
In addition, in industries such as shipbuilding, metallurgy, chemical industry, also can run into some similarly to the making difficult problem of the high bend pipe of morpheme dimensional requirement.
Summary of the invention
Technical problem to be solved by this invention provides a kind of combined shaping mold that the high bend pipe of morpheme dimensional requirement is made that satisfies.
The technical solution adopted for the present invention to solve the technical problems is: combined shaping mold, comprise upper die and lower die and core, core adopts metal to make, and it is characterized in that: core is filled the filling rate in space in the body greater than 95%, wherein, filling rate is core volume and the ratio of managing interior spatial volume; Core comprises core and a plurality of chock under core on the polylith, the polylith, chock be arranged between core and the following core and the diameter of the width of chock and body endoporus suitable, the axis of chock is on the axis of body endoporus, the quantity of last core, following core and chock equates that the last core of corresponding position, position, following core and chock length on the axially bored line in body are suitable.
As preferential technical scheme, the volume in space is 97.5% in the pipe of the body of core filling hot segment of bent pipe of main pipeline.
In the technique scheme, core comprises under the convex core under the core and matrix under the bending section, the shoulder plane of core is provided with axial projection under the convex, the shoulder plane of core is provided with axial groove under the matrix, under the adjacent convex under core and the matrix shoulder plane mutual plane of core contact and projection and groove fit form circumferential location structure; Under the polylith convex under core and the matrix core at interval stacked arrangement and stacked after the length and the interior axially bored line arc length of the bending section of body suitable.
As further optimization, be provided with circumferential location structure under the polylith bending section between the core to technique scheme.
Further be, core comprises under the convex core under the core and matrix under the above-mentioned bending section, the shoulder plane of core is provided with axial projection under the convex, the shoulder plane of core is provided with axial groove under the matrix, under the adjacent convex under core and the matrix shoulder plane mutual plane of core contact and projection and groove fit form circumferential location structure; Under the polylith convex under core and the matrix core at interval stacked arrangement and stacked after the length and the interior axially bored line arc length of the bending section of body suitable.
The invention has the beneficial effects as follows: because core is filled the filling rate in space in the body greater than 95%, not only can satisfy the specification requirement that the high bend pipe of morpheme dimensional requirement is made, compare with mach this type of bend pipe simultaneously, the metal structure of its body and performance can obtain more effectively guaranteeing, also reduced the machined difficulty simultaneously, the metal cutting amount is few, blank weight reduces, the crooked position out-of-roundness of bend pipe, crooked back of the body arc attenuate amount, nominal wall thickness, minimum wall thickness (MINI W.)s etc. can both well guarantee, also can reduce the ring and the gauffer phenomenon of crooked position simultaneously, can be widely used in various making the high bend pipe of morpheme dimensional requirement.
Description of drawings
Fig. 1 is the front view that adopts a kind of hot segment of bent pipe of main pipeline of reactor of Mold Making of the present invention.
Fig. 2 is along the cutaway view of A-A direction among Fig. 1.
Fig. 3 is along the cutaway view of B-B direction among Fig. 1.
Fig. 4 is the front view of hot segment of bent pipe of main pipeline of reactor that adopts the another kind of version of Mold Making of the present invention.
Fig. 5 is the front view of pipe of the hot segment of bent pipe of main pipeline of reactor of construction drawing 1.
Fig. 6 is the front view of pipe of the hot segment of bent pipe of main pipeline of reactor of construction drawing 4.
Fig. 7 is that employing of the present invention is combined into pattern carries out processing and forming to the camber section schematic diagram.
Fig. 8 is the cutaway view along C-C direction among Fig. 7.
Fig. 9 is the matching relationship decomposing schematic representation of core under core and the matrix under the convex among Fig. 7.
Figure 10 is an elbow compression moulding schematic diagram commonly used.
Figure 11 is 1.5D major radius elbow blank figure.
Be labeled as among the figure: core 102, shoulder plane 11, straightway metope 12 under core 101, the matrix under core 10, the convex under core 9, the bending section under core 8, the straight length on core 7, the bending section on bending section 1, straight length 2, ozzle 3, patrix 4, counterdie 5, chock 6, the straight length, cavity 13, projection 14, groove 15.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
As Fig. 1～shown in Figure 9, combined shaping mold of the present invention comprises patrix 4, counterdie 5 and core, and core adopts metal to make, thereby can be easily packs into and the demoulding the body bending section behind bend pipe easily from the straight tube of pipe; Core is filled the filling rate in space in the body greater than 95%, preferably reaches 97.5%, and wherein, filling rate is core volume and the ratio of managing interior spatial volume.So just can further guarantee its briquetting pressure can evenly be transmitted, be convenient to evenly flowing of metal, also can guarantee the specification requirement of the morpheme sizes such as circularity requirement, attenuate amount of product simultaneously.
In order to satisfy filling rate that core fills space in the body, can adopt multiple version greater than 95%.For example, above-mentioned core comprises core and a plurality of chock 6 formations under core on the polylith, the polylith, the quantity of last core, following core is many more, can guarantee volume that core fills space in the pipe of body of hot segment of bent pipe of main pipeline more greater than 95%, thereby reach the specification requirement of the out-of-roundness of the bending section of body, crooked back of the body arc attenuate amount etc.Chock 6 be arranged between core and the following core and the diameter of the width of chock 6 and body endoporus suitable, the axis of chock 6 is on the axis of body endoporus, is used for wedging and withdraws from core.Last core, down the quantity of core and chock 6 equates, the last core of corresponding position, position, core and chock 6 length on the axially bored line in body are suitable down, thereby makes it can phase mutual interference when bend pipe, and the bending section of assurance body is smooth smooth.
Because bend pipe has comprised straight length 2 and bend loss 1, therefore, last core comprises on the straight length core 8 on the core 7 and bending section, the length of core 7 is mated with the length of the straight length 2 of corresponding body on the straight length, on the polylith bending section core 8 stacked arrangement and stacked after the length and the inner hole wall arc length of the bending section 1 of body suitable, thereby guarantee the smooth smooth of circular arc in the bending section of body; Following core comprises under the straight length core 10 under the core 9 and polylith bending section, the length of core 9 is mated with the length of the straight length 2 of corresponding body under the straight length, under the polylith bending section core 10 stacked arrangement and stacked after the length and the interior axially bored line arc length of the bending section 1 of body suitable, thereby make the axial arc of bend pipe after the moulding good, reduce ring sample defective, promptly surfacing is smooth.
In order to prevent when the bend pipe, relatively moving of circumferencial direction taken place between the core 10 under the adjacent flex section, thereby causes the bend pipe defective, be provided with circumferential location structure under the polylith bending section between the core 10.
The circumferential location structure that is provided with between the core 10 under the polylith bending section, can adopt between the core 10 axial pin is set under the adjacent flex section, the hole fit structure waits and realizes, can also adopt other similar structures, but smooth more smooth for the surface of the bending section 1 that makes body, can adopt following structure:
Core 10 is made up of core 102 under core 101 and the matrix under the polylith convex under the bending section, the shoulder plane 11 of core 101 is provided with axial projection 14 under the convex, the shoulder plane 11 of core 102 is provided with axial groove 15 under the matrix, under the adjacent convex under core 101, the matrix contact of shoulder plane 11 mutual planes of core 102 and projection 14 cooperates with groove 15, under the polylith convex under core 101, the matrix core 102 interval stacked arrangement and projection 14 cooperate the circumferential location structure of formation with groove 15; Under the polylith convex under core 101 and the matrix core 102 the interior axially bored line arc length of the bending section 1 of the length after the stacked arrangement and body is suitable at interval.The above-mentioned stacked arrangement of core 102 under core 101, the matrix under the polylith convex, 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, only be on the shoulder plane of plane contact, to slide but do not break away from plane contact between the core 102 under core 101, the matrix under the adjacent convex, the gap that forms between the core 102 under core 101, the matrix under the adjacent convex has been divided into three sections not little block gaps on same cross section by the fit structure of projection 14 and groove 15, make the axial arc of bend pipe after the moulding good, further eliminate ring sample defective, make its surface smooth more smooth.
In order to guarantee the circularity requirement of product, counterdie 5 both sides are straightway metope 12, and patrix 4 is inserted between the straightway metope 12 of counterdie 5, and the width between the straightway metope 12 of the width of patrix 4 and counterdie 5 both sides is suitable.Like this, the bending section 1 that makes its body can both obtain the guard circle protection from managing bad straight tube in the process of whole brake forming.
Embodiment 1: combined shaping mold of the present invention, be used for construction drawing 1 ~ hot segment of bent pipe of main pipeline of reactor shown in Figure 3, radius of curvature R=the 1.5D of the bending section 1 on the body of this bend pipe, be provided with straight length 2 at bending section 1 two ends, two ozzles 3 that the position of close bending section 1 is provided with on the straight length 2, two ozzles 3 are separately positioned on the straight length 2 at bending section 1 two ends, the axis of two ozzles 3 not at grade, D is the body external diameter.Body adopts the integrative-structure of the solid forging of super-low carbon stainless steel making, produces the pipe of straight tube-like according to the each several part construction profile of body.Adopt combined shaping mold of the present invention that pipe is processed, the filling rate that core is filled space in the body is 95%, patrix 4 and counterdie 5 be provided with body on the position and the suitable cavity 13 of size of ozzle 3.Bending section 1 is by compression molding, and straight length 2 and ozzle 3 adopt the machined moulding.The processing back is tested product, meets design requirement.
Embodiment 2: combined shaping mold of the present invention, be used to make hot segment of bent pipe of main pipeline of reactor shown in Figure 4, radius of curvature R=the 1.5D of the bending section 1 on the body of this bend pipe, be provided with straight length 2 at bending section 1 two ends, two ozzles 3 that the position of close bending section 1 is provided with on the straight length 2, two ozzles 3 are separately positioned on the straight length 2 at bending section 1 two ends, and the axis of two ozzles 3 is in the same plane, and D is the body external diameter.Body adopts the integrative-structure of the solid forging of super-low carbon stainless steel making, produces the pipe of straight tube-like according to the each several part construction profile of body.Adopt combined shaping mold of the present invention that pipe is processed, the filling rate that core is filled space in the body is 97.5%, patrix 4 and counterdie 5 be provided with body on the position and the suitable cavity 13 of size of ozzle 3.Bending section 1 is by compression molding, and straight length 2 and ozzle 3 adopt the machined moulding.The processing back is tested product, meets design requirement.
Claims (7)
1, combined shaping mold comprises patrix (4), counterdie (5) and core, and core employing metal is made, and it is characterized in that: core is filled the filling rate in space in the body greater than 95%, and wherein, filling rate is core volume and the ratio of managing interior spatial volume; Core comprises core and a plurality of chock (6) under core on the polylith, the polylith, chock (6) be arranged between core and the following core and the diameter of the width of chock (6) and body endoporus suitable, the axis of chock (6) is on the axis of body endoporus, the quantity of last core, following core and chock (6) equates that the last core of corresponding position, position, following core and the length of chock (6) in body on the axially bored line are suitable.
2, combined shaping mold as claimed in claim 1 is characterized in that: the volume in space is 97.5% in the pipe of the body of core filling hot segment of bent pipe of main pipeline.
3, combined shaping mold as claimed in claim 1 or 2, it is characterized in that: go up core and comprise core (8) on core on the straight length (7) and the bending section, the length coupling of the length of core on the straight length (7) and the straight length (2) of corresponding body, (8) stacked arrangement of core on the polylith bending section and stacked after the length and the inner hole wall arc length of the bending section (1) of body suitable; Following core comprises core (10) under core under the straight length (9) and the bending section, the length coupling of the length of core under the straight length (9) and the straight length (2) of corresponding body, (10) stacked arrangement of core under the polylith bending section and stacked after the length and the interior axially bored line arc length of the bending section (1) of body suitable.
4, combined shaping mold as claimed in claim 3 is characterized in that: core under the polylith bending section is provided with circumferential location structure between (10).
5, combined shaping mold as claimed in claim 4, it is characterized in that: core under the bending section (10) comprises core (102) under core under the convex (101) and the matrix, the shoulder plane (11) of core under the convex (101) is provided with axial projection (14), the shoulder plane (11) of core under the matrix (102) is provided with axial groove (15), and shoulder plane (11) mutual plane of core (102) contacts and projection (14) cooperates with groove (15) and forms circumferential location structure under core under the adjacent convex (101) and the matrix; Under core under the polylith convex (101) and the matrix core (102) at interval stacked arrangement and stacked after the length and the interior axially bored line arc length of the bending section (1) of body suitable.
6, as claim 1,2,4 or 5 described combined shaping molds, it is characterized in that: counterdie (5) both sides are straightway metope (12), patrix (4) is inserted between the straightway metope (12) of counterdie (5), and the width between the straightway metope (12) of the width of patrix (4) and counterdie (5) both sides is suitable.
7, combined shaping mold as claimed in claim 3, it is characterized in that: counterdie (5) both sides are straightway metope (12), patrix (4) is inserted between the straightway metope (12) of counterdie (5), and the width between the straightway metope (12) of the width of patrix (4) and counterdie (5) both sides is suitable.
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| CNB2008103007399A CN100563865C (en) | 2008-03-27 | 2008-03-27 | Combined shaping mold |
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| CNB2008103007399A CN100563865C (en) | 2008-03-27 | 2008-03-27 | Combined shaping mold |
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| CN100563865C true CN100563865C (en) | 2009-12-02 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102248047A (en) * | 2011-06-01 | 2011-11-23 | 二重集团（德阳）重型装备股份有限公司 | Combined mandrel used for die-pressing of elbow tube and application method thereof |
| CN103658273A (en) * | 2012-09-11 | 2014-03-26 | 北京首宏钢重型装备技术有限公司 | Combined core mould and pipe fitting bending mould |
| CN103658274A (en) * | 2012-09-11 | 2014-03-26 | 北京首宏钢重型装备技术有限公司 | Pipe fitting forming device |
| CN103506491B (en) * | 2013-09-18 | 2015-11-18 | 燕山大学 | The combination that a kind of main nuclear power pipeline is shaped bends upper die structure |
| CN103495630B (en) * | 2013-09-29 | 2015-07-08 | 上海电机学院 | Cold bend forming device for main pipeline of nuclear power station device and core module |
| CN104339487B (en) * | 2014-10-30 | 2017-01-25 | 四川福翔科技有限公司 | Forming die for bent connecting pipe |
| CN109047417A (en) * | 2018-09-17 | 2018-12-21 | 江阴机械制造有限公司 | A kind of guide plate for pipe fitting bend pipe |
| CN109622692A (en) * | 2018-12-17 | 2019-04-16 | 渤海造船厂集团有限公司 | Bend Stainless Steel U pipe internal support device |
| CN109570296A (en) * | 2018-12-17 | 2019-04-05 | 渤海造船厂集团有限公司 | A kind of bending method of Stainless Steel U pipe |
| CN112829134B (en) * | 2021-01-04 | 2023-03-21 | 中车青岛四方机车车辆股份有限公司 | Compression molding tooling and compression molding process for core mold and hollow camber beam |
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| CN101244443A (en) | 2008-08-20 |
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Effective date of registration: 20180403 Address after: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee after: Double (Deyang) heavy equipment Co., Ltd. Address before: 618013 Deyang Pearl River West Road, Sichuan, No. 460 Patentee before: Erzhong Group (Deyang) Heavy Equipment Co., Ltd. |
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Effective date of registration: 20180615 Address after: No. 99, Pearl River East Road, Deyang, Sichuan Province, Sichuan Patentee after: National machine heavy equipment group Limited by Share Ltd Address before: 618013 No. 460 Zhujiang West Road, Sichuan, Deyang Patentee before: Double (Deyang) heavy equipment Co., Ltd. |
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