CN101249600A - Forging bearing straight three-way production method - Google Patents
Forging bearing straight three-way production method Download PDFInfo
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- CN101249600A CN101249600A CNA200810034744XA CN200810034744A CN101249600A CN 101249600 A CN101249600 A CN 101249600A CN A200810034744X A CNA200810034744X A CN A200810034744XA CN 200810034744 A CN200810034744 A CN 200810034744A CN 101249600 A CN101249600 A CN 101249600A
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Abstract
The invention relates to a pipeline for pressure vessels, in particular to a method for manufacturing high-pressure and high-temperature resistance large straight-tees. The method comprises the following steps: preparing the blank to be forged; then carrying out the molding treatment of the straight-tee main and branch holes, wherein the molding treatment is carried out by forging punching holes and enlarging holes, and when forging the punching holes, the position of the center line of the main hole forged deviates from the position of the center line of the blank; and finally, carrying out after-forging treatment, including the re-treatment of the main hole and the branch hole. The method has the advantages of replacing the status of the imports all year round, reducing the cost of production, greatly saving the manpower and time, and decreasing the processing period. Furthermore, the method uses the forged punching, thereby eliminating the defect that the material inside the solid core of the large billet is loose, and significantly improving the mechanical performance of the product when tested by the United States ASME SA182 standard.
Description
Technical field
The present invention relates to the pressure vessel conduit class, relate to a kind of large-scale straight three-way production method of high pressure resistant, high temperature concretely.
Background technology
Large-scale straight tee (ST.TEE) is mainly used in t-joints such as large-sized boiler pressure vessel conduit, high pressure resistant (〉=30MPa), high temperature (〉=500 ℃), belonging to open die forgings on the hammer of highest level (5 grades) as forging, volume is big, complex-shaped, the required state of the drawing of main aperture is quite complicated technically.Instructions for use has comprised " normally " " unusually " " promptly " and has determined its every test stone with the consequence and the extent of injury of different operating modes such as " accidents ", and it is quite big to produce this forging product difficulty.
The present main dependence on import of this product, the large-scale straight tee (ST.TEE) of external import is after being forged by whole block material, method with turning directly goes out a main aperture and a hole by the drawing dimensioned, not only feed consumption is many, man-hour is big, cost is high, main is that the very difficult inside of causing because of material thickness reason of eliminating of monoblock large shape forging is loose, will certainly influence product quality to a certain extent
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of forging bearing straight three-way production method is provided, this method with the straight tee (ST.TEE) main aperture forging ratio greater than 4 rectangular die forging embryo on how much directly punchings of symmetry, through displacement reaming, die shaping and decide the main aperture center and finish technological forming, and on a hole face, locate, unidirectional towards its blind hole, solved the deficiencies in the prior art.
Because the position in hole is not in the symmetrical centre of cuboid column, main aperture produces with the method for punching, suitable difficulty on FMT, if with 5 tons of direct punching presses of electric liquid hammer, it respectively can cause the inclination in entire product cross section to the drag difference because of belonging to the symmetrical punching that do not wait on both sides.Also make last " shearing recoil " together operation of punching can't aim at the upright position of preceding road " extruding blind hole ".Directly influence the quality in the process of producing product, produce great scrappage.Therefore the present invention adopts die, realize displacement reaming, tup shaping simultaneously and decide the method at main aperture center, make the main aperture of straight tee (ST.TEE) be in drawing fixed asymmetric position, overcome integral inclination, situations such as main aperture deviation have realized with the direct production straight tee (ST.TEE) of method of forging.
The object of the invention realizes being finished by following technical scheme:
A kind of forging bearing straight three-way production method is characterized in that this method comprises following step: the preparation that forges stock; Carry out the forming processes in a straight tee (ST.TEE) main aperture and a hole afterwards, wherein this forming processes is by forging punching, reaming realization, and when forging punching, the position of center line that forges main aperture departs from the position of center line that forges stock; Forge post processing at last, comprising the processing again in a main aperture and a hole.
When the main aperture forming processes, forge punching along the main aperture center line at first in one direction, forge punching along the main aperture center line in the other direction more afterwards, and then reaming.
Forging the hole that is dashed along the main aperture center line at first in one direction is blind hole, connects by forging punching in the other direction afterwards.
Described reaming realizes that by using die reaming is unified with the center line of both direction institute punching, simultaneously with main aperture center line precision offset to assigned position.
What the forming processes in described hole adopted is the unidirectional punching press blind hole that forges.
Advantage of the present invention is the present situation that has replaced long-term import, reduces production costs, and has saved manpower and time greatly, has reduced the processing duration; Adopt and forge punching, eliminated the loose defective of the real in-core layer of big shaped steel embryo material, U.S.'s ASME SA182 standard of the mechanical property ratio examination of product is obviously improved, product quality is higher than external imported product far away, and technology is led over external product.
Description of drawings
Accompanying drawing 1 is straight tee (ST.TEE) cross-sectional view of the present invention;
Accompanying drawing 2 forges the stock cross-sectional view for straight tee (ST.TEE) of the present invention;
Accompanying drawing 3 is the side view of accompanying drawing 2.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:
As Figure 1-3, label 1-5 represents respectively: stock 1, a hole 2, interview part 3, end test specimen 4, main aperture 5.
The present embodiment method comprises following step:
(1) stock is prepared: with a qualified steel ingot excision end to end, forge into satisfactory forging stock 1, determine the central point of punching press main aperture according to true form, the size of required straight tee (ST.TEE).
(2) forming processes in a straight tee (ST.TEE) main aperture and a hole: forge punching, skew reaming and die location in the main aperture punching press central spot of stock 1, wherein when forging punching, forge punching along the main aperture center line at first in one direction, forge punching along main aperture center line symmetry in the other direction more afterwards, use die to threeway shoulder skew reaming and compacting location afterwards, with the main aperture disalignment to assigned position.
Forging the hole that is dashed along the main aperture center line at first in one direction can be blind hole, connects by forging punching in the other direction afterwards.
When forging punching, should guarantee that the position of main aperture 5 is in suitable eccentric size, to guarantee to satisfy the requirement of drawing.
(3) forging post processing comprises the steps:
A. forge after-baking: utilize rated power forging to be done annealing heat treatment for the bench vehicle type electrical resistance furnace of 420KW, because of material behavior and the big characteristics of forging, must guarantee the temperature retention time of annealing forging the instant heating shove charge annealing of end back, forge the embryo internal stress to eliminate, otherwise forging is very easy to explosion;
B. flaw detection for the first time: six face roughing will forging embryo 1 see that white (improving the accuracy of flaw detection) makes ultrasonic wave by standard to six surfaces of forging embryo and detect a flaw for the first time;
C. secondary flaw detection: after pre-test is qualified, will forge embryo 1 roughing (comprising boring main aperture 5, a hole 2) size to the heat treatment, polishing endoporus and outer surface edges and corners are the angle, garden, by the JB4730 standard forging are made the ultrasonic wave secondary and detect a flaw;
D.N+T heat treatment: utilize rated power forging to be made normalizing+tempering heat treatment for the bench vehicle type electrical resistance furnace of 420KW;
E. sawing sample: heat treatment cooling back at the main aperture two ends and a hole face respectively saw the thick test specimen of a slice 30mm 3, test specimen 4,180 degree materials (do one draw, three performance test such as dash);
F. three flaw detections: forging profile and main aperture 5, a hole 2 are machined to the roughing size, do final ultrasonic examination;
G. fine finishining: to straight tee (ST.TEE) fine finishining, carry out to profile the finish turning of main aperture, a hole and groove by fine finishining figure requirement respectively with vertical lathe and boring machine;
H. penetrant inspection: three hipped end oral thermometer faces are done penetrant inspection by the JB4730 standard.
The present embodiment fine finishining of selecting materials from the beginning, each program is all quite important, comprise the preparation that forges stock, and by the main aperture 5 that forges the punching realization, the shaping processing in a hole 2, when forging punching, the position of main aperture is used to wear axially, asymmetric in center line, for avoiding punching to scrap, need progressively make main aperture 5 off-centrings to qualified position by means of die in the process of displacement reaming.Prop up the unidirectional punching press blind hole of face location, hole, strengthened the density of a hole 2 peripheral materials.Forge post processing, comprising the processing of handling and propping up the hole again of main aperture.
The product that adopts the present embodiment method to produce, its mechanical property obviously improves than U.S.'s ASME SA182 standard of examination, specifically sees the following form, and this table is ASME SA182 standard and this product (0710177-1) performance table of comparisons:
| σ 02 | σ b | δ(％) | Ψ(％) | AKV | HB | |
| The SA182 standard | ≥415 | ≥585 | ≥20 | ≥40 | ≥35 | ≤248 |
| The present embodiment product | 581 | 676 | 25 | 72 | 122 | 192 |
As seen this product quality reaches and surpasses imported product, and technology is led over external like product.
Claims (5)
1. a forging bearing straight three-way production method is characterized in that this method comprises following step: the preparation that forges stock; Carry out the forming processes in a straight tee (ST.TEE) main aperture and a hole afterwards, wherein this forming processes is by forging punching, reaming realization, and when forging punching, the position of center line that forges main aperture departs from the position of center line that forges stock; Forge post processing at last, comprising the processing again in a main aperture and a hole.
2. a kind of forging bearing straight three-way production method according to claim 1, it is characterized in that when the main aperture forming processes, forge punching along the main aperture center line at first in one direction, forge punching along the main aperture center line in the other direction more afterwards, and then reaming.
3. a kind of forging bearing straight three-way production method according to claim 2 is characterized in that forging the hole that is dashed along the main aperture center line at first in one direction is blind hole, connects by forging punching in the other direction afterwards.
4. a kind of forging bearing straight three-way production method according to claim 2 is characterized in that described reaming realizes that by using die reaming is unified with the center line of both direction institute punching, simultaneously with main aperture center line precision offset to assigned position.
5. a kind of forging bearing straight three-way production method according to claim 1, what it is characterized in that the forming processes in described hole adopts is the unidirectional punching press blind hole that forges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810034744XA CN101249600A (en) | 2008-03-18 | 2008-03-18 | Forging bearing straight three-way production method |
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| CNA200810034744XA CN101249600A (en) | 2008-03-18 | 2008-03-18 | Forging bearing straight three-way production method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489587A (en) * | 2011-11-29 | 2012-06-13 | 上海新闵重型锻造有限公司 | Forging pore-forming method of large forging eccentric pores |
| CN102909523A (en) * | 2011-08-01 | 2013-02-06 | 上海格尔汽车金属制品有限公司 | Method for machining Y-shaped pipe |
| CN102962635A (en) * | 2012-10-22 | 2013-03-13 | 上海锐迈重工有限公司 | Method for producing high-yield value pipeline ball-passing tee joint |
| CN104724640A (en) * | 2015-02-17 | 2015-06-24 | 中国石油天然气集团公司 | Tee joint conveying device and conveying method thereof |
| CN104942212A (en) * | 2014-03-31 | 2015-09-30 | 河北汇中管道装备有限公司 | Improvement in forging technology for manufacturing large tee joint through composite board |
| CN105327970A (en) * | 2015-12-03 | 2016-02-17 | 应敏燕 | Red punching forming process for three-way pipe joint |
| CN105750840A (en) * | 2016-04-21 | 2016-07-13 | 苏州市东盛锻造有限公司 | Method for forging tee-joint forge piece |
| CN107931497A (en) * | 2017-11-27 | 2018-04-20 | 上海鸿基金属制品有限公司 | Combine the cold-heading molding technique of fixed link |
| CN110116185A (en) * | 2018-02-06 | 2019-08-13 | 赖传荣 | The manufacturing method of short sleeve |
| CN110899585A (en) * | 2018-09-17 | 2020-03-24 | 上海新闵重型锻造有限公司 | Die forging manufacturing method of steam outlet connecting pipe forge piece |
| CN112207219A (en) * | 2019-07-12 | 2021-01-12 | 余姚市佳福车业有限公司 | Production and manufacturing method for hot forging inner hole of metal part |
| CN114183610A (en) * | 2021-11-10 | 2022-03-15 | 湖州精锤铸锻有限公司 | Sleeve four-way forging structure and machining process |
-
2008
- 2008-03-18 CN CNA200810034744XA patent/CN101249600A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909523A (en) * | 2011-08-01 | 2013-02-06 | 上海格尔汽车金属制品有限公司 | Method for machining Y-shaped pipe |
| CN102489587A (en) * | 2011-11-29 | 2012-06-13 | 上海新闵重型锻造有限公司 | Forging pore-forming method of large forging eccentric pores |
| CN102962635A (en) * | 2012-10-22 | 2013-03-13 | 上海锐迈重工有限公司 | Method for producing high-yield value pipeline ball-passing tee joint |
| CN104942212B (en) * | 2014-03-31 | 2017-09-05 | 河北汇中管道装备有限公司 | Composite board makes large-scale threeway forging process |
| CN104942212A (en) * | 2014-03-31 | 2015-09-30 | 河北汇中管道装备有限公司 | Improvement in forging technology for manufacturing large tee joint through composite board |
| CN104724640B (en) * | 2015-02-17 | 2017-03-08 | 中国石油天然气集团公司 | A kind of threeway transporting device and its have bad luck method |
| CN104724640A (en) * | 2015-02-17 | 2015-06-24 | 中国石油天然气集团公司 | Tee joint conveying device and conveying method thereof |
| CN105327970A (en) * | 2015-12-03 | 2016-02-17 | 应敏燕 | Red punching forming process for three-way pipe joint |
| CN105750840A (en) * | 2016-04-21 | 2016-07-13 | 苏州市东盛锻造有限公司 | Method for forging tee-joint forge piece |
| CN107931497A (en) * | 2017-11-27 | 2018-04-20 | 上海鸿基金属制品有限公司 | Combine the cold-heading molding technique of fixed link |
| CN110116185A (en) * | 2018-02-06 | 2019-08-13 | 赖传荣 | The manufacturing method of short sleeve |
| CN110899585A (en) * | 2018-09-17 | 2020-03-24 | 上海新闵重型锻造有限公司 | Die forging manufacturing method of steam outlet connecting pipe forge piece |
| CN110899585B (en) * | 2018-09-17 | 2022-11-18 | 上海新闵重型锻造有限公司 | Die forging manufacturing method of steam outlet connecting pipe forging |
| CN112207219A (en) * | 2019-07-12 | 2021-01-12 | 余姚市佳福车业有限公司 | Production and manufacturing method for hot forging inner hole of metal part |
| CN112207219B (en) * | 2019-07-12 | 2023-09-22 | 余姚市佳福车业有限公司 | Production and manufacturing method for hot forging inner hole of metal piece |
| CN114183610A (en) * | 2021-11-10 | 2022-03-15 | 湖州精锤铸锻有限公司 | Sleeve four-way forging structure and machining process |
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Open date: 20080827 |