CN102641936A - Tubing bulging device and method using internal heating and pressing - Google Patents
Tubing bulging device and method using internal heating and pressing Download PDFInfo
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- CN102641936A CN102641936A CN201210140091XA CN201210140091A CN102641936A CN 102641936 A CN102641936 A CN 102641936A CN 201210140091X A CN201210140091X A CN 201210140091XA CN 201210140091 A CN201210140091 A CN 201210140091A CN 102641936 A CN102641936 A CN 102641936A
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Abstract
A tubing bulging device and a method using internal heating and pressing relate to a tubing bulging device and a method. The tubing bulging device and the method are used for solving problems that during the thermal state bulging process in existing tubings, shape and size changes of a mould cavity are easily caused by heat expansion and cold contraction, and the plastic deformation of a whole mould is easily caused by the fact that the mould strength is reduced. The device includes that a left die block and a right die block are parallelly arranged on a lower seal base from left to right in a sealing mode, an upper seal base is disposed at the upper ends of the left die block and the right die block, and an air feeding hole is mounted on the upper seal base. The method includes that a formed cavity is formed by the left die block and the right die block, two ends of a tube blank are sealed, the tube blank is heated by a heating unit to reach a set forming temperature, high pressure gases are fed into the tube blank, the heating is stopped when the tube blank is completely attached to the mould and maintained for some time, then the high pressure gases in the tube blank are released, a formed tube fitting is obtained, and the tubing bulging is completed. The tubing bulging device and the method using internal heating and pressing are applied to tubing bulging.
Description
Technical field
The present invention relates to a kind of tube bulge device and method, be specifically related to a kind of tube bulge device and method that adopts inner heating and pressurizing.
Background technology
The tubular member of different shape and size has in fields such as Aero-Space, automobile, bicycles very widely to be used.Under a lot of situation, different parts all has the cross section of different diameter and non-circle on the tubular member.In order to be that the pipe of straight line, equal diameters is processed final complex pipes with initial axis, the normal employing to pipe is inner feeds the method that high-pressure medium (like water, gas etc.) makes the original pipe generation bulging and the pipe outside mould that reclines.For the tubing preferably of deformability under the room temperatures such as steel pipe, general direct distortion at normal temperatures can obtain the part that needs.For the relatively poor tubing of plasticity under the room temperatures such as aluminium alloy, magnesium alloy, titanium alloy, often need to improve forming temperature to improve the forming property of tubing.
For tubing such as aluminium alloy, magnesium alloys, when temperature is brought up to 450 ℃ of left and right sides, can obtain forming property preferably, its resistance of deformation also declines to a great extent simultaneously, can adopt lower pressure to form.At this moment, can adopt pipe preheating outside mould moved quickly on the mould under the normal temperature then to be shaped, or adopt the method that shaping dies and pipe are heated together and then be shaped.Because of forming temperature is lower, be heated shape, change in size that the back produces of heat-resisting less demanding to mould, mould is also not obvious.But for high strength linepipe such as titanium alloys, suitable forming temperature is often above 850 ℃.If adopt this moment pipe and mould are heated the method that is shaped then together; Low, the operating difficulties of the efficiency of heating surface not only; Even more serious is mould intensity reduction at high temperature; Significant change takes place because of expanding with heat and contract with cold in the shape of its die cavity, size easily, causes the shape of final formation of parts, dimensional accuracy relatively poor.And the load that in forming process, is applied can not be too big, otherwise mould will deform with pipe together, causes serious quality and safety problem.
In sum, in the existing hot bulging process of tubing,, there are the shape, the change in size that cause mold cavity easily because of expanding with heat and contract with cold, easy problem because of the plastic deformation of mould strength reduction generation mold integral if mould and pipe are heated simultaneously and then be shaped.
Summary of the invention
The objective of the invention is in order to solve in the existing hot bulging process of tubing; If mould and pipe are heated simultaneously and then are shaped; There are the shape, the change in size that cause mold cavity easily because of expanding with heat and contract with cold; Reduce the problem of generation mold integral plastic deformation easily because of mould strength, and then a kind of tube bulge device and method that adopts inner heating and pressurizing is provided.
Technical scheme of the present invention is: a kind of tube bulge device of inner heating and pressurizing that adopts comprises pressurized cylinder and forcing pipe; Said tube bulge device also comprises bottom sealing socket, heating unit, left module, right module, upper seal support and back-up block; Bottom sealing socket is horizontally disposed with on the ground; Left side module and right module seal side by side from left to right and are arranged on the bottom sealing socket; Upper seal support is arranged on the upper end of left module and right module, and back-up block is arranged on the bottom sealing socket between left module and the right module, and heating unit is arranged on the back-up block; Have on the upper seal support with left module and right module between the air-filled pore that is connected of the shaping die cavity that forms, be tightly connected through forcing pipe between the air-filled pore of pressurized cylinder and upper seal support.
Technical scheme of the present invention is: a kind of detailed process of the tube bulge method of inner heating and pressurizing that adopts is:
The present invention compared with prior art has following effect:
(1) adopts the heating unit that places pipe inside to treat the shaping pipe and heat, can in whole bulging process, continue heating, avoid influencing its distortion because of the pipe temperature reduces to pipe;
(2) only heat pipe to be formed and do not heat shaping dies, the shape and size of the mold cavity that produces in the time of can avoiding heating pipe and mould simultaneously change;
(3) mould is in lower temperature all the time in the forming process, and bulk strength is higher, therefore can adopt higher shaping air pressure to improve the forming quality of tubing;
(4) the present invention is simple in structure, and cost is low, and is easy to use.
Description of drawings
Shown in Figure 1 is the sketch map of the inner heating and pressurizing bulging of tubing.Shown in Figure 2 is the structural representation of tubing internal pressurization bulging.Structural representation for the tube bulge end shown in Figure 3.Shown in Figure 4 is the structural representation of tubing die sinking pickup.Shown in Figure 5 for only adopting induction coil that pipe is heated.Shown in Figure 6 is in induction coil, to place solid mandrel pipe is heated.Shown in Figure 7 is in induction coil, to place thick-wall tube pipe is heated.Shown in Figure 8 for adopting heating rod that pipe is heated.Shown in Figure 9 for adopting heating rod and heat transfer block that pipe is heated.
The specific embodiment
The specific embodiment one: combine Fig. 1 that this embodiment is described; A kind of tube bulge device of inner heating and pressurizing that adopts of this embodiment comprises pressurized cylinder 17 and forcing pipe 18; Said tube bulge device also comprises bottom sealing socket 1, heating unit 2, left module 4, right module 5, upper seal support 6 and back-up block 8; Bottom sealing socket 1 is horizontally disposed with on the ground, and left module 4 seals side by side from left to right with right module 5 and is arranged on the bottom sealing socket 1, and upper seal support 6 is arranged on the upper end of left module 4 and right module 5; Back-up block 8 is arranged on the bottom sealing socket 1 between left module 4 and the right module 5; Heating unit 2 is arranged on the back-up block 8, have on the upper seal support 6 with left module 4 and right module 5 between the air-filled pore 7 that is connected of the shaping die cavity that forms, be tightly connected through forcing pipe 18 between the air-filled pore 7 of pressurized cylinder 17 and upper seal support 6.
The specific embodiment two: combine Fig. 5 and Fig. 8 that this embodiment is described, the heating unit 2 of this embodiment is spirally-wound induction coil 9 or a plurality of heating rod 12.So be provided with, can be respectively mode through eddy-current heating and heating rod radiation heating pipe 3 is heated.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: combine Fig. 6 that this embodiment is described, the heating unit 2 of this embodiment comprises induction coil 9 and solid mandrel 10, and induction coil 9 is spirally wrapped around on the solid mandrel 10, and solid mandrel 10 sealings are provided with on the bottom sealing socket 1.So be provided with, will pipe 3 be heated through the mode of radiation after placing the solid mandrel 10 of induction coil 9 to be heated, improved firing rate, and helped keeping heating process stability.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment four: combine Fig. 7 that this embodiment is described, the heating unit 2 of this embodiment comprises induction coil 9 and hollow plug 11, and induction coil 9 is spirally wrapped around on the hollow plug 11, and hollow plug 11 sealings are arranged on the back-up block 8.So be provided with, will pipe 3 be heated through the mode of radiation after placing the hollow plug 11 of induction coil 9 to be heated, can reach and adopt the same effect of solid mandrel, need not increase the power of induction heating equipment simultaneously again.Be applicable to the bulging of major diameter tubing.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment five: combine Fig. 9 that this embodiment is described; The heating unit 2 of this embodiment comprises heat transfer block 14, a plurality of heating rod 12 and Duo Gen lead-in wire 13; Heat transfer block 14 is arranged on the back-up block 8; A plurality of heating rods 12 are located on the heat transfer block 14, and each heating rod 12 is connected with power supply through a lead-in wire 13.So be provided with, can be according to the needs configuration heating rod quantity and the position of pipe diameter, to improve heats.Other composition and annexation are identical with the specific embodiment one.
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 tube bulge.Other composition and annexation are identical with the specific embodiment one, two, three, four or five.
The specific embodiment seven: combine Fig. 2-Fig. 4 that this embodiment is described, the detailed process of the tube bulge method of this embodiment is:
The specific embodiment eight: combine Fig. 1-Fig. 4 that this embodiment is described, the step 1 of this embodiment is 6061 aluminium alloys to the pipe 3 in the step 6, is heated to 300 ~ 550 ℃, and the gas pressure that charges into is 1 ~ 35Mpa, and gases used is compressed air or nitrogen.Other condition is identical with the specific embodiment seven with step.
The specific embodiment nine: combine Fig. 1-Fig. 4 that this embodiment is described, the step 1 of this embodiment is the TA2 titanium alloy to the pipe 3 in the step 6, is heated to 500 ~ 950 ℃, and the gas pressure that charges into is 2 ~ 55Mpa, and gases used is compressed air or nitrogen.Other condition is identical with the specific embodiment seven with step.
Claims (8)
1. tube bulge device that adopts inner heating and pressurizing; It comprises pressurized cylinder (17) and forcing pipe (18); It is characterized in that: said tube bulge device also comprises bottom sealing socket (1), heating unit (2), left module (4), right module (5), upper seal support (6) and back-up block (8); Bottom sealing socket (1) is horizontally disposed with on the ground; Left side module (4) and right module (5) seal side by side from left to right and are arranged on the bottom sealing socket (1); Upper seal support (6) is arranged on the upper end of left module (4) and right module (5), and back-up block (8) is arranged on the bottom sealing socket (1) between left module (4) and the right module (5), and heating unit (2) is arranged on the back-up block (8); Have on the upper seal support (6) with left module (4) and right module (5) between the air-filled pore (7) that is connected of the shaping die cavity that forms, be tightly connected through forcing pipe (18) between the air-filled pore (7) of pressurized cylinder (17) and upper seal support (6).
2. a kind of tube bulge device that adopts inner heating and pressurizing according to claim 1 is characterized in that: heating unit (2) is spirally-wound induction coil (9) or a plurality of heating rod (12).
3. a kind of tube bulge device that adopts inner heating and pressurizing according to claim 1; It is characterized in that: heating unit (2) comprises induction coil (9) and solid mandrel (10); Induction coil (9) is spirally wrapped around on the solid mandrel (10), and solid mandrel (10) sealing is arranged on the bottom sealing socket (1).
4. a kind of tube bulge device that adopts inner heating and pressurizing according to claim 1; It is characterized in that: heating unit (2) comprises induction coil (9) and hollow plug (11); Induction coil (9) is spirally wrapped around on the hollow plug (11), and hollow plug (11) sealing is arranged on the back-up block (8).
5. a kind of tube bulge device that adopts inner heating and pressurizing according to claim 1; It is characterized in that: heating unit (2) comprises heat transfer block (14), a plurality of heating rod (12) and many lead-in wires (13); Heat transfer block (14) is arranged on the back-up block (8); A plurality of heating rods (12) are located on the heat transfer block (14), and each heating rod (12) is connected with power supply through a lead-in wire (13).
6. an application rights requires 1 described a kind of tube bulge method that adopts the tube bulge device of inner heating and pressurizing, and it is characterized in that: the detailed process of tube bulge method is:
Step 1, left module (4), pipe (3) and right module (5) to be formed are placed on the bottom sealing socket (1) from left to right successively; Utilize left module (4) and right module (5) to constitute the shaping die cavity, pipe (3) is sleeved on heating unit (2) and the back-up block (8);
Step 2, make upper seal support (6) descending, press left module (4) and right module (5) and make the two ends of pipe (3) realize sealing;
Step 3, utilization place the inner heating unit (2) of pipe (3) that pipe (3) is heated, and make 300 ~ 900 ℃ of its forming temperatures that reaches setting;
Step 4, charge into gases at high pressure through the air-filled pore of offering on the upper seal support (6) (7) to pipe (3) inside, charged pressure is 1 ~ 60Mpa, makes pipe (3) that bulging take place;
Step 5, treat that pipe (3) pastes mould fully and keeps 1min-20min after, stop heating, then, let out except that the gases at high pressure in the pipe (3);
Step 6, make on the upper seal support (6) and move, separate left module (4) and right module (5) to the left and right, take out shaping rear tubular member (3-2), so far, accomplish the bulging of tubing.
7. according to claim 6ly utilize a kind of tube bulge method that adopts inner heating and pressurizing; It is characterized in that: step 1 is 6061 aluminium alloys to the pipe (3) in the step 6; Be heated to 300 ~ 550 ℃; The gas pressure that charges into is 1 ~ 35Mpa, and gases used is compressed air or nitrogen.
8. according to claim 6ly utilize a kind of tube bulge method that adopts inner heating and pressurizing; It is characterized in that: step 1 is the TA2 titanium alloy to the pipe (3) in the step 6; Be heated to 500 ~ 950 ℃, the gas pressure that charges into is 2 ~ 55Mpa, and gases used is compressed air or nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210140091XA CN102641936A (en) | 2012-05-08 | 2012-05-08 | Tubing bulging device and method using internal heating and pressing |
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| CN201210140091XA CN102641936A (en) | 2012-05-08 | 2012-05-08 | Tubing bulging device and method using internal heating and pressing |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935453A (en) * | 2012-11-12 | 2013-02-20 | 山西征宇喷灌有限公司 | Air-pressure molding method for spherical quick connectors of metallic pipelines |
| CN103521586A (en) * | 2013-10-23 | 2014-01-22 | 宁波宝洲消防科技有限公司 | Stainless steel pipe molding device |
| CN103712862A (en) * | 2013-12-30 | 2014-04-09 | 重庆市科学技术研究院 | Device for testing expansion performance of magnesium alloy tubular product |
| CN104624769A (en) * | 2015-01-06 | 2015-05-20 | 哈尔滨工业大学（威海） | Internal pressure forming and heat treatment integration device and method |
| CN104801621A (en) * | 2015-05-02 | 2015-07-29 | 汪浩 | Liquid-nitrogen diameter expanding apparatus for pipeline |
| CN105964749A (en) * | 2016-06-27 | 2016-09-28 | 南京航空航天大学 | Manufacturing device and method for metal corrugated pipe |
| CN107866458A (en) * | 2017-11-06 | 2018-04-03 | 北京航星机器制造有限公司 | A kind of change coefficient of friction realizes manufacturing process of the High temperature bulging from feed supplement |
| CN109482703A (en) * | 2018-12-28 | 2019-03-19 | 哈尔滨工业大学 | A kind of big section difference titanium alloy pipe fitting differential temperature pneumatic shaping method and device |
| CN114311625A (en) * | 2021-11-26 | 2022-04-12 | 昌河飞机工业（集团）有限责任公司 | Device and method for expanding end of large-diameter guide pipe of helicopter |
| CN114769409A (en) * | 2022-04-26 | 2022-07-22 | 福州大学 | Pipe fitting induction heating electromagnetic bulging device and working method thereof |
| CN114932172A (en) * | 2022-06-17 | 2022-08-23 | 燕山大学 | Production device and method for bimetal composite pipe |
| CN115106428A (en) * | 2022-07-04 | 2022-09-27 | 哈尔滨工业大学 | In-situ strengthening rapid forming method for titanium alloy thin-wall pipe |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102935453B (en) * | 2012-11-12 | 2016-04-13 | 山西征宇喷灌有限公司 | The method of a kind of air-pressure forming metallic conduit ball-type snap joint |
| CN102935453A (en) * | 2012-11-12 | 2013-02-20 | 山西征宇喷灌有限公司 | Air-pressure molding method for spherical quick connectors of metallic pipelines |
| CN103521586A (en) * | 2013-10-23 | 2014-01-22 | 宁波宝洲消防科技有限公司 | Stainless steel pipe molding device |
| CN103521586B (en) * | 2013-10-23 | 2015-10-21 | 宁波宝洲消防科技有限公司 | Stainless steel tube shaped device |
| CN103712862A (en) * | 2013-12-30 | 2014-04-09 | 重庆市科学技术研究院 | Device for testing expansion performance of magnesium alloy tubular product |
| CN104624769A (en) * | 2015-01-06 | 2015-05-20 | 哈尔滨工业大学（威海） | Internal pressure forming and heat treatment integration device and method |
| CN104801621A (en) * | 2015-05-02 | 2015-07-29 | 汪浩 | Liquid-nitrogen diameter expanding apparatus for pipeline |
| CN105964749B (en) * | 2016-06-27 | 2018-04-17 | 南京航空航天大学 | The manufacture device and method of a kind of metal bellows |
| CN105964749A (en) * | 2016-06-27 | 2016-09-28 | 南京航空航天大学 | Manufacturing device and method for metal corrugated pipe |
| CN107866458A (en) * | 2017-11-06 | 2018-04-03 | 北京航星机器制造有限公司 | A kind of change coefficient of friction realizes manufacturing process of the High temperature bulging from feed supplement |
| CN107866458B (en) * | 2017-11-06 | 2020-04-10 | 北京航星机器制造有限公司 | Forming method for realizing high-temperature bulging self-feeding material by changing friction coefficient |
| CN109482703A (en) * | 2018-12-28 | 2019-03-19 | 哈尔滨工业大学 | A kind of big section difference titanium alloy pipe fitting differential temperature pneumatic shaping method and device |
| CN114311625A (en) * | 2021-11-26 | 2022-04-12 | 昌河飞机工业（集团）有限责任公司 | Device and method for expanding end of large-diameter guide pipe of helicopter |
| CN114769409A (en) * | 2022-04-26 | 2022-07-22 | 福州大学 | Pipe fitting induction heating electromagnetic bulging device and working method thereof |
| CN114932172A (en) * | 2022-06-17 | 2022-08-23 | 燕山大学 | Production device and method for bimetal composite pipe |
| CN114932172B (en) * | 2022-06-17 | 2024-03-29 | 燕山大学 | Bimetal composite pipe production device and method thereof |
| CN115106428A (en) * | 2022-07-04 | 2022-09-27 | 哈尔滨工业大学 | In-situ strengthening rapid forming method for titanium alloy thin-wall pipe |
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Application publication date: 20120822 |