CN102672007A - Internal heating and pressurizing pipe distortion rectification device and method - Google Patents
Internal heating and pressurizing pipe distortion rectification device and method Download PDFInfo
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- CN102672007A CN102672007A CN2012101401077A CN201210140107A CN102672007A CN 102672007 A CN102672007 A CN 102672007A CN 2012101401077 A CN2012101401077 A CN 2012101401077A CN 201210140107 A CN201210140107 A CN 201210140107A CN 102672007 A CN102672007 A CN 102672007A
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Abstract
The invention discloses an internal heating and pressurizing pipe distortion rectification device and an internal heating and pressurizing pipe distortion rectification method, relates to a pipe distortion rectification device and a pipe distortion rectification method, and aims to solve the problem that the shape and size of a die are easily changed to influence a distortion rectification effect if distortion is rectified after a pipe billet and the die are simultaneously heated when the distortion of a strong-strength pipe is rectified. According to the device, an upper sliding block, an upper die holder and a lower die holder are sequentially arranged on a lower tabletop from top to bottom; a die insert is inserted between the upper and lower die holders; a support block is arranged on the lower tabletop in the die insert; a heating source is arranged on the support block; and an air vent communicated with an inner cavity of the die insert is reserved in the upper die holder. The method comprises the following steps of: placing a pipe billet of which the distortion is to be rectified on the lower die holder in a sealed way; heating the pipe billet; introducing high-pressure gas into the pipe billet; bulging the pipe billet of which the distortion is to be rectified, and gradually attaching the pipe billet to the inner cavity of the distortion rectification insert to finish the distortion rectification; and after the distortion rectification is finished, relieving the high-pressure gas, taking the distortion-rectified pipe billet out, and cutting undistorted areas at the two ends to finish the distortion rectification of the pipe. The device and the method are used for the distortion rectification of the pipe.
Description
Technical field
The present invention relates to a kind of tubing corrector and method, be specifically related to a kind of tubing corrector and method that adopts inner heating and pressurizing.
Background technology
Major diameter tubing in the commercial production adopts the mode processing and manufacturing of coil sheet weldering mostly, noncircular cross section or irregular section often occur at the volume postwelding.Be employed at present the inner rigid die that adds of pipe more and perhaps carry out the school circle to the inner method that feeds high-pressure medium of pipe.Adopt the inner method that adds rigid die school circle to have the drawback of complex equipments, interchangeability difference, the mould that the tubing of a kind of specification of every school shape needs a cover to be complementary with it, cost is higher.And adopt to the inner method that feeds high-pressure medium of pipe is to make to deform under the effect of original pipe in interior pressure to realize the school circle.This method technology is simple, cost is lower.
For the stronger tubing of deformability at room temperature such as stainless steel; Generally can directly utilize at normal temperatures to the inner method that feeds high-pressure medium of pipe and carry out school shape; And for the relatively poor tubing of plasticity under the room temperatures such as aluminium alloy, magnesium alloy, titanium alloy, then need be through improving its temperature to improve the forming property of tubing.
For tubing such as aluminium alloy, magnesium alloys,, temperature can make the remarkable reduction of its yield strength obtain forming property preferably simultaneously when bringing up to 400 ℃ of left and right sides, and use lower pressure can accomplish school shape.At this moment, can adopt pipe preheating outside mould moved quickly into then and carry out school shape on the mould that is under the normal temperature state, or adopt high-ranking officers' shape mould and pipe to heat the method for school shape then together.Lower because of its forming temperature for almag, heat-resisting less demanding to mould, the school shape mould shape and size that the back produces of being heated change not obvious.But for high-intensity tubing such as titanium alloys, desirable school shape temperature is often above 850 ℃.If adopt the method that pipe and mould are heated simultaneously this moment, school shape mould at high temperature is prone to the variation of shape and size, finally possibly cause school shape to be failed.
In sum, when high strength linepipe is carried out school shape, if school shape again after pipe and mould heated simultaneously, there is the easy variation of mold shape and size and influences the problem of school shape effect.
Summary of the invention
The objective of the invention is in order to solve when high strength linepipe carried out school shape, if there is the problem of the easy variation of mold shape and size in school shape again after pipe and mould heated simultaneously, and then a kind of tubing corrector and method that adopts inner heating and pressurizing is provided.
Technical scheme of the present invention is: a kind of tubing corrector of inner heating and pressurizing that adopts comprises pressurized cylinder and forcing pipe; Said tubing corrector also comprises top shoe, upper bolster, die insert, die shoe, heating source, back-up block and following table; Following table is horizontally disposed with on the ground; Top shoe, upper bolster and die shoe from top to bottom are successively set on the following table, and die insert is embedded between upper bolster and the die shoe, and back-up block is arranged on the following table in the die insert; Heating source is arranged on the back-up block; And heating source and outside link sealing are arranged on the back-up block, have the passage with the die insert intracavity inter-connection on the upper bolster, are tightly connected through forcing pipe between the passage on pressurized cylinder and the upper bolster.
Technical scheme of the present invention is: a kind of detailed process of the tubing straightening method of inner heating and pressurizing that adopts is:
The present invention compared with prior art has following effect:
(1) adopts the technology of inner heating and pressurizing to carry out school shape, avoided mold materials to be heated effectively through the mode of inside heating the variation of shape and size takes place;
(2) adopt the technology of inner heating and pressurizing to carry out school shape, insert through replacing school shape and realize school shape, reduce production costs greatly the different size pipe;
(3) adopt the technology of inner heating and pressurizing to carry out school shape, can under higher temperature, reduce the yield strength of aluminium alloy, magnesium alloy, titanium alloy, improve its forming property;
(4) adopt the technology of inner heating and pressurizing to carry out school shape, what inside fed is high-pressure gas medium, has effectively avoided traditional oils to be pressed into shape contaminated environment and the high shortcoming of production cost.
Description of drawings
Fig. 1 is the principle schematic of the inner heating and pressurizing of tubing school shape.Fig. 2 is the die sinking stage of tubing; Fig. 3 is the matched moulds sealing stage of tubing.Fig. 4 is the heating and pressurizing stage of tubing.Fig. 5 is the subsides mould school shape stage of tubing.Fig. 6 only adopts induction coil to treat the sketch map that school shape pipe 7 heats.Fig. 7 places solid mandrel to treat the sketch map that school shape pipe 7 heats in induction coil.Fig. 8 places hollow plug to treat the sketch map that school shape pipe 7 heats in induction coil.Fig. 9 is that the pipe end utilizes the reaming of rigidity boss to realize the sketch map of sealing.Figure 10 utilizes the rigidity boss that has the polyurethane collar to realize the sketch map of sealing in the pipe end.Figure 11 utilizes polyurethane block to realize the sketch map of sealing in derivation place of induction coil copper pipe.
The specific embodiment
The specific embodiment one: combine Fig. 1 that this embodiment is described; A kind of tubing corrector of inner heating and pressurizing that adopts of this embodiment comprises pressurized cylinder 17 and forcing pipe 18; Said tubing corrector also comprises top shoe 1, upper bolster 2, die insert 3, die shoe 4, heating source 6, back-up block 8 and following table 9; Following table 9 is horizontally disposed with on the ground; Top shoe 1, upper bolster 2 and die shoe 4 from top to bottom are successively set on the following table 9, and die insert 3 is embedded between upper bolster 2 and the die shoe 4, and back-up block 8 is arranged on the following table 9 in the die insert 3; Heating source 6 is arranged on the back-up block 8; And heating source 6 is arranged on the back-up block 8 with outside link sealing, has the passage 5 with die insert 3 intracavity inter-connections on the upper bolster 2, is tightly connected through forcing pipe 18 between the passage 5 on pressurized cylinder 17 and the upper bolster 2.
The specific embodiment two: combine Fig. 6 that this embodiment is described, the heating source 6 of this embodiment is spirally-wound induction coil 10.So be provided with, the mode through eddy-current heating heats pipe 7, and firing rate is fast, can realize the local temperature control to tubing through shape, size and the position of adjustment induction coil 10.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: combine Fig. 7 that this embodiment is described, the heating source 6 of this embodiment comprises induction coil 10 and solid mandrel 11, and induction coil 10 is spirally wrapped around on the solid mandrel 11, and solid mandrel 11 is arranged on the back-up block 8.So be provided with, heated solid mandrel 11 heats pipe 7 through the mode of radiation, and firing rate is than only adopting induction coil 10 to heat soon, and the pipe temperature is more stable.Other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment four: combine Fig. 8 that this embodiment is described, the heating source 6 of this embodiment comprises induction coil 10 and hollow plug 12, and induction coil 10 is spirally wrapped around on the hollow plug 12, and hollow plug 12 is arranged on the back-up block 8.So be provided with, can obtain to adopt the effect same of solid mandrel, do not need the power of extra increase induction heating equipment simultaneously again.Be applicable to the school shape of major diameter tubing.Other composition and annexation are identical with the specific embodiment one, two or three.
The specific embodiment five: combine Fig. 8 that this embodiment is described, the internal diameter of the hollow plug 12 of this embodiment is 100mm-500mm.So be provided with, be convenient to heat according to the needs of pipe diameter.Other composition and annexation are identical with the specific embodiment four.
The specific embodiment six: combine Fig. 1 that this embodiment is described, the pressurized cylinder 17 of this embodiment is hydraulic pressure booster cylinder or air pressure pressurized cylinder.So be provided with, be applicable to and use highly pressurised liquid or use gases at high pressure to carry out tubing school shape.Other composition and annexation are identical with the specific embodiment one, two, three, four or five.
The specific embodiment seven: combine Figure 11 that this embodiment is described; The tubing corrector of this embodiment also comprises the thermal insulation board 15 and first Polyurethane Wearing Ring 16; The middle part of die shoe 4 has heating source and passes a mouthful 4-1; Thermal insulation board 15 comprises thermal insulation board 15-1 and following thermal insulation board 15-2; All have round mouth on last thermal insulation board 15-1, following thermal insulation board 15-2 and first Polyurethane Wearing Ring 16; Last thermal insulation board 15-1 and following thermal insulation board 15-2 are packed in heating source from top to bottom and pass in mouthful 4-1, and first Polyurethane Wearing Ring 16 is arranged between thermal insulation board 15-1 and the following thermal insulation board 15-2, and the extruding realization through 15 pairs first Polyurethane Wearing Ring 16 of thermal insulation board is to the sealing of heating source 6 and outside link.So be provided with, can guarantee that the temperature of first Polyurethane Wearing Ring 16 under heated condition is lower, thereby realize positiver sealing.Other composition and annexation are identical with the specific embodiment one, two, three, four or five.
The specific embodiment eight: combine Fig. 2-Fig. 5 that this embodiment is described, the detailed process of the tubing straightening method of this embodiment is:
The tubing straightening method of the inner heating and pressurizing of the said employing of this embodiment treats that school shape pipe is 6061 aluminium alloys, is heated to 300 ~ 550 ℃, and the gas pressure that charges into is 1 ~ 35Mpa, and used gas is compressed nitrogen or argon gas.
The tubing straightening method of the inner heating and pressurizing of the said employing of this embodiment treats that school shape pipe is the TA2 titanium alloy, is heated to 800 ~ 1200 ℃, and the gas pressure that charges into is 2 ~ 55Mpa, and used gas is compressed nitrogen or argon gas.
The specific embodiment nine: combine Fig. 9 that this embodiment is described, the step 1 of this embodiment is to realize treating the sealing of shape pipe 7 ends, school through the mode of using 13 reamings of rigidity boss.So be provided with, pipe 7 ends closely contact good sealing effect with rigidity boss 13.Can under higher temperature conditions, realize positiver sealing.Other condition is identical with the specific embodiment eight with step.
The specific embodiment ten: combine Figure 10 that this embodiment is described, the step 1 of this embodiment is to realize treating the sealing of shape pipe 7 ends, school through the mode that extruding is arranged on second Polyurethane Wearing Ring, 14 distortion on upper bolster 2 lower surfaces.So be provided with,, when the cross sectional shape of pipe 7 ends is irregular or of low quality, still can realize reliable sealing because second Polyurethane Wearing Ring 14 can be born bigger distortion.Other condition is identical with the specific embodiment eight with step.
Claims (10)
1. tubing corrector that adopts inner heating and pressurizing; It comprises pressurized cylinder (17) and forcing pipe (18); It is characterized in that: said tubing corrector also comprises top shoe (1), upper bolster (2), die insert (3), die shoe (4), heating source (6), back-up block (8) and following table (9); Following table (9) is horizontally disposed with on the ground; Top shoe (1), upper bolster (2) and die shoe (4) from top to bottom are successively set on the following table (9), and die insert (3) is embedded between upper bolster (2) and the die shoe (4), and back-up block (8) is arranged on the following table (9) in the die insert (3); Heating source (6) is arranged on the back-up block (8); And heating source (6) is arranged on the back-up block (8) with outside link sealing, has the passage (5) with die insert (3) intracavity inter-connection on the upper bolster (2), is tightly connected through forcing pipe (18) between the passage (5) on pressurized cylinder (17) and the upper bolster (2).
2. a kind of tubing corrector that adopts inner heating and pressurizing according to claim 1 is characterized in that: heating source (6) is a spirally-wound induction coil (10).
3. a kind of tubing corrector that adopts inner heating and pressurizing according to claim 1; It is characterized in that: heating source (6) comprises induction coil (10) and solid mandrel (11); Induction coil (10) is spirally wrapped around on the solid mandrel (11), and solid mandrel (11) is arranged on the back-up block (8).
4. a kind of tubing corrector that adopts inner heating and pressurizing according to claim 1; It is characterized in that: heating source (6) comprises induction coil (10) and hollow plug (12); Induction coil (10) is spirally wrapped around on the hollow plug (12), and hollow plug (12) is arranged on the back-up block (8).
5. a kind of tubing corrector that adopts inner heating and pressurizing according to claim 4, it is characterized in that: the internal diameter of hollow plug (12) is 100mm-500mm.
6. according to claim 1,2,3,4 or 5 described a kind of tubing correctors that adopt inner heating and pressurizing, it is characterized in that: pressurized cylinder (17) is hydraulic pressure booster cylinder or air pressure pressurized cylinder.
7. according to claim 1,2,3,4 or 5 described a kind of tubing correctors that adopt inner heating and pressurizing; It is characterized in that: said tubing corrector also comprises thermal insulation board (15) and first Polyurethane Wearing Ring (16); The middle part of die shoe (4) has heating source and passes mouthful (4-1); Thermal insulation board (15) comprises thermal insulation board (15-1) and following thermal insulation board (15-2); All have round mouth on last thermal insulation board (15-1), following thermal insulation board (15-2) and first Polyurethane Wearing Ring (16); Last thermal insulation board (15-1) and following thermal insulation board (15-2) are packed in heating source from top to bottom and pass in mouthful (4-1); First Polyurethane Wearing Ring (16) is arranged between thermal insulation board (15-1) and the following thermal insulation board (15-2), realizes the sealing of heating source (6) with outside link through the extruding of thermal insulation board (15) to first Polyurethane Wearing Ring (16).
8. an application rights requires 1 described a kind of tubing straightening method that adopts the tubing corrector of inner heating and pressurizing, and it is characterized in that: the detailed process of tubing straightening method is:
Step 1, will treat that the pipe (7) of school shape is placed on the die shoe (4), make that top shoe (1) is descending to be inserted (3) to press school shape, and realize treating the sealing of school shape pipe (7);
Step 2, utilization place the heating source (6) of treating school shape pipe (7) to heat;
Step 3, the passage (5) on pipe (7) reaches after 200 ℃ ~ 950 ℃ through upper bolster (2), offered are to the gases at high pressure of treating the inner 1 ~ 55Mpa of feeding of school shape pipe (7);
Step 4, under the effect of gases at high pressure, make and treat that bulging school shape (3) inner chamber of inserting of fitting gradually takes place school shape pipe (7), realizes school shape;
Step 5, school shape are let out except that gases at high pressure after finishing, and remove top shoe with school shape is inserted, and take out the pipe after the shape of school, and the excision two ends are the school shape tubing that meets the demands of deformed region and then acquisition not, the school shape of completion tubing.
9. according to claim 8ly utilize a kind of tubing straightening method that adopts inner heating and pressurizing, it is characterized in that: step 1 is that the mode through rigidity boss (13) reaming realizes treating the sealing of school shape pipe (7) end.
10. according to claim 8ly utilize a kind of tubing straightening method that adopts inner heating and pressurizing, it is characterized in that: step 1 is to realize treating the sealing of school shape pipe (7) end through the mode that extruding is arranged on second Polyurethane Wearing Ring (14) distortion on upper bolster (2) lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101401077A CN102672007A (en) | 2012-05-08 | 2012-05-08 | Internal heating and pressurizing pipe distortion rectification device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101401077A CN102672007A (en) | 2012-05-08 | 2012-05-08 | Internal heating and pressurizing pipe distortion rectification device and method |
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| CN2012101401077A Pending CN102672007A (en) | 2012-05-08 | 2012-05-08 | Internal heating and pressurizing pipe distortion rectification device and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104178712A (en) * | 2014-02-24 | 2014-12-03 | 深圳市长盈精密技术股份有限公司 | Thermal correcting method of magnesium alloy support piece for mobile telephone |
| CN104990832A (en) * | 2015-06-16 | 2015-10-21 | 哈尔滨工业大学 | Method for monitoring corrosion property of tungsten top hole through changes of air pressure in hollow cathode |
| CN106077225A (en) * | 2016-06-22 | 2016-11-09 | 北京航空航天大学 | A kind of liquid swollen shape-calibration machine of U-shaped bulkhead class aviation thin-walled workpiece deformation |
| CN106363340A (en) * | 2016-08-19 | 2017-02-01 | 天津森马机械制造有限公司 | Precision adjustment method and device for feed dog tooth grooves |
| CN107262997A (en) * | 2017-06-21 | 2017-10-20 | 李培芹 | A kind of rectangular tube group welds stretching apparatus |
| CN109433864A (en) * | 2018-11-14 | 2019-03-08 | 航天特种材料及工艺技术研究所 | Big L/D ratio ultra-thin-wall stainless steel cylindrical member straightening method and tooling |
| CN112658066A (en) * | 2020-12-08 | 2021-04-16 | 湖南苏普锐油气装备科技有限公司 | Oil and gas pipeline hot bending processing method and device |
| CN114472602A (en) * | 2022-01-27 | 2022-05-13 | 东北林业大学 | Hydraulic shape correction device and method for multi-cavity special-shaped thin-wall section pipe |
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| CN104178712A (en) * | 2014-02-24 | 2014-12-03 | 深圳市长盈精密技术股份有限公司 | Thermal correcting method of magnesium alloy support piece for mobile telephone |
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| CN106077225A (en) * | 2016-06-22 | 2016-11-09 | 北京航空航天大学 | A kind of liquid swollen shape-calibration machine of U-shaped bulkhead class aviation thin-walled workpiece deformation |
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| CN109433864A (en) * | 2018-11-14 | 2019-03-08 | 航天特种材料及工艺技术研究所 | Big L/D ratio ultra-thin-wall stainless steel cylindrical member straightening method and tooling |
| CN112658066A (en) * | 2020-12-08 | 2021-04-16 | 湖南苏普锐油气装备科技有限公司 | Oil and gas pipeline hot bending processing method and device |
| CN114472602A (en) * | 2022-01-27 | 2022-05-13 | 东北林业大学 | Hydraulic shape correction device and method for multi-cavity special-shaped thin-wall section pipe |
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Application publication date: 20120919 |