CN105013921A - Magnetic pulse forming method for lining bimetal composite pipe - Google Patents
Magnetic pulse forming method for lining bimetal composite pipe Download PDFInfo
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Abstract
The invention relates to a bimetal composite pipe machining method in particular to a magnetic pulse forming method for a lining bimetal composite pipe. The method aims at solving the problem that an existing magnetic pulse bimetal composite pipe forming method cannot combine a large-diameter pipe blank. The method includes the steps of firstly, surface purification treatment of the pipe blank to be combined, secondly, locating and clamping of the pipe blank to be combined, thirdly, machining of the first combining sub-step, fourthly, machining of the following combining sub-steps and fifthly, machining of the bimetal composite pipe. By the adoption of the forming method, an expanding and bulging manner of a thin wall pipe is used for achieving mechanical combination of an inner pipe and an outer pipe, the manufacturing process is simple, and the combined strength can reach 0.5 MPa to 13 MPa compared with similar products and higher than the combined strength of about 0.2 MPa of the similar products. The forming method is suitable for manufacturing the lining bimetal composite pipe.
Description
Technical field
The present invention relates to composite bimetal pipe processing method, particularly relate to a kind of magnetic pulse formation processing method of inner liner bimetal composite.
Background technology
Multiple tube, also known as bimetal tube, is also called cage walls, and it is made up of the metal pipe material of two kinds of unlike materials, realizes combining closely and shape all-in-one-piece laminar composite between tube layer by certain distortion or interconnection technique.Compared with single metal tube, composite bimetal pipe has played the advantage of two kinds of metals, and it not only has required high strength, also has good anticorrosion, the premium properties such as wear-resistant simultaneously, thus reaches the object of " making the best use of everything ".
In recent years, especially carry on the pipeline of Korrosionsmedium both at home and abroad at the feed-line in water-supply line, oil field, gas field and the feed-line of chemical enterprise etc., large-scale popularization uses inner liner bimetal composite material.The anti-corrosive alloy material (as stainless steel, aluminium alloy etc.) thick compared with thin-walled and the carbon steel base tube with higher mechanical strength are complex as a whole by suitable Combined Machining Technology by inner liner bimetal composite, both ensure that the corrosion resistant requirement of pipe material inner wall, greatly reduce again the consumption of anti-corrosive alloy material, the requirement of different working condition can be met, extend the service life of pipe fitting, thus there is good overall economic efficiency, have the very strong market competitiveness.
Different according to inner liner bimetal composite interface fine structure, domestic and international processing and manufacturing inner liner bimetal composite roughly can be divided into following two large classes: a class is metallurgical compound, includes centrifugal casting, welding cladding, multi-blank extruding and Explosion composite; Another kind of is mechanical compound, as spinning, mechanical pull, hydro-joining etc.Metallurgical compound technology need adopt special equipment, complex procedures, high to the control overflow of composite quality.If do not have special working condition requirement (such as hot environment), the liner bimetallic compound of mechanical bond is adopted to meet instructions for use.The interlayer combined strength bination size of mechanical bond type inner liner bimetal composite is the important technology index judging inner liner bimetal composite performance.All the time there is the effect of residual contact stress in the contact surface due to liner corrosion resisting alloy pipe and base tube, thus can improve the mechanical performance of inner liner bimetal composite entirety.But it is general lower that the mechanical complex method used at present prepares the interlayer combined strength bination that inner liner bimetal composite reaches.In addition, adopt the mode such as mechanical pull, spinning to carry out multiple tube and add man-hour, owing to being Mechanical Contact, forming tool is inevitably to tube surfaces generation damage to a certain degree, and prepared multiple tube can not meet the performance of some industries to inner liner bimetal composite, the requirement of precision; And when adopting fluid power load mode to process inner liner bimetal composite, then exist equipment seal request high, the problems such as production efficiency is low.The deficiency of existing manufacture inner liner bimetal composite, limits inner liner bimetal composite propagation and employment in the industry, to a certain extent thus in the urgent need to development of new Combined Machining Technology.
Electro-magnetic forming is a kind of Metal Forming technology of the eighties of last century rise sixties, because it has the advantages such as workpiece deformation speed is fast, efficiency is high, composite quality is good, be applied to connection and the assembling of pipe fitting (or sheet material), become a kind of dissimilar metal compound of having a high potential and welding method.But the capacity usage ratio of electro-magnetic forming equipment is lower, also far can not meet the needs of large-sized structural parts at present, therefore, electromagnetism interconnection technique only obtains application at present in the connection of dissimilar metal pipe fitting joint.
Existing application number is 201210239093.4, denomination of invention is " the magnetic pulse formation device and method of composite bimetal pipe ", it discloses a kind of method utilizing magnetic pulse formation composite bimetal pipe, and the magnetic coil specifically disclosed by collecting chinaware forms pipe inside and outside to be composite, the undergauge plastic deformation that this process employs thin-walled outer tube reaches the magnetic pulse formation preparation of outer cladding type composite bimetal pipe, but, the method is limited to the general principle of outer tube generation necking deformation and the geometry of collection chinaware, it is only applicable to the preparation of outer cladding type bimetal tube, cannot be shaped inside bearing strip composite bimetal pipe.
Summary of the invention
The method that the object of the invention is to solve existing magnetic pulse formation composite bimetal pipe cannot be shaped the problem of compound of major diameter pipe, and provides a kind of magnetic pulse formation processing method of inner liner bimetal composite.
The magnetic pulse formation processing method of a kind of inner liner bimetal composite of the present invention is carried out according to the following steps:
One, the surface cleaning process of pipe to be composite: clear up with the outer surface of acetone to the inner surface of outer tube to be composite and internal lining pipe to be composite, to remove the pollutant of outer pipe internal surface to be composite and internal lining pipe outer surface to be composite, obtain the internal lining pipe to be composite after the outer tube to be composite after clearing up and cleaning;
Two, the localization and clamping of pipe to be composite: the outer surface of the internal lining pipe to be composite after the inner surface of the outer tube to be composite after the cleaning first obtained by alcohol wipe step one and cleaning, then outer tube to be composite and internal lining pipe to be composite are placed with one heart, the tube wall gap of filling outer tube to be composite and internal lining pipe two ends to be composite with insulating materials sleeve pipe with guarantee outer tube to be composite and internal lining pipe to be composite coaxial, obtain the pipe to be composite after locating, then form-wound coil is inserted the pipe to be composite behind location, again form-wound coil is fixed on workbench, complete the localization and clamping of pipe to be composite,
Three, compound sub-step one is processed: arranging discharge voltage is 9.5kV ~ 12kV, is realized the first step combined shaping processing of pipe to be composite, obtain the pipe to be composite after the processing of first step combined shaping by form-wound coil;
Four, follow-up compound sub-step processing: keep form-wound coil at the invariant position of workbench, pipe to be composite after first step combined shaping processing step 3 obtained axially moves relative to form-wound coil along form-wound coil by the mode of gradual feeding, the amount of feeding is 50% of form-wound coil operation interval effective length, the non-deformed area of pipe to be composite is made to enter the operation interval of form-wound coil, arranging discharge voltage is 9.5kV ~ 12kV, implements the processing of follow-up compound sub-step;
Five, the processing of composite bimetal pipe: the operation repeating step 4, until the composite bimetal pipe obtaining Len req.
Beneficial effect of the present invention
Operation principle: electromagnetic forming machine is the pulse current of decay by actuating coil release vibration, electric current around coil excitation pulse high-intensity magnetic field so that make pipe surface produce induced-current, according to Lenz's law, the magnetic line of force is constrained in the gap between pipe and coil.Because the magnetic line of force has the characteristic of expansion, tube blank inner wall is subject to the huge magnetic field force of amplitude (see Fig. 1), this magnetic field force drives interior pipe generation plastic deformation and high-speed motion, interior pipe is always accelerated until collide with outer tube in ligament, and be closely linked with outer tube, thus the compound realized between tube layer, manufacturing process of the present invention is the mechanical bond utilizing the expanding bulging mode of light-wall pipe to realize inner and outer pipes, and manufacturing process of the present invention is applicable to the preparation of inside bearing strip composite bimetal pipe.
Compared with other techniques existing, the beneficial effect that the magnetic pulse formation process technology that the present invention proposes reaches has:
1, be a kind of green manufacture technology, process is without ecological pollution;
2, manufacturing process is simple, and machining energy is easy to accurate control, working (machining) efficiency is high, workable;
3, impulsive force is without the need to putting on pipe by power transmission medium, reduces the friction effect of forming process, can not cause destruction and the impact of anti-corrosion layer performance on interliner alloy tubing;
4, combined strength bination can reach 0.5MPa ~ 13MPa compared with similar products, all higher than the combined strength bination (about 0.2MPa) with like product.Performance is more reliable and more stable, according to the requirement of serviceability, can do suitable adjustment to the size of combined strength bination in the scope of product standard, meet the different demands of client.
Accompanying drawing explanation
Fig. 1 is the magnetic pulse formation processing method initial stressed schematic diagram of a kind of inner liner bimetal composite of the present invention; Wherein 1 is internal lining pipe, and 2 is form-wound coil, and 3 is outer tube, and 4 is electromagnetic force, and 5 is electromagnetic forming machine;
Fig. 2 is that the magnetic pulse formation processing method of a kind of inner liner bimetal composite of the present invention added Principle of Process figure; Wherein 1 is internal lining pipe, and 2 is form-wound coil, and 3 is outer tube, and 4 is electromagnetic force, and 5 is electromagnetic forming machine, and 6 is pipe feeding direction to be composite.
Detailed description of the invention
Detailed description of the invention one: the magnetic pulse formation processing method of a kind of inner liner bimetal composite of present embodiment is carried out according to the following steps:
One, the surface cleaning process of pipe to be composite: clear up with the outer surface of acetone to the inner surface of outer tube to be composite and internal lining pipe to be composite, to remove the pollutant of outer pipe internal surface to be composite and internal lining pipe outer surface to be composite, obtain the internal lining pipe to be composite after the outer tube to be composite after clearing up and cleaning;
Two, the localization and clamping of pipe to be composite: the outer surface of the internal lining pipe to be composite after the inner surface of the outer tube to be composite after the cleaning first obtained by alcohol wipe step one and cleaning, then outer tube to be composite and internal lining pipe to be composite are placed with one heart, the tube wall gap of filling outer tube to be composite and internal lining pipe two ends to be composite with insulating materials sleeve pipe with guarantee outer tube to be composite and internal lining pipe to be composite coaxial, obtain the pipe to be composite after locating, then form-wound coil is inserted the pipe to be composite behind location, again form-wound coil is fixed on workbench, complete the localization and clamping of pipe to be composite,
Three, compound sub-step one is processed: arranging discharge voltage is 9.5kV ~ 12kV, is realized the first step combined shaping processing of pipe to be composite, obtain the pipe to be composite after the processing of first step combined shaping by form-wound coil;
Four, follow-up compound sub-step processing: keep form-wound coil at the invariant position of workbench, pipe to be composite after first step combined shaping processing step 3 obtained axially moves relative to form-wound coil along form-wound coil by the mode of gradual feeding, the amount of feeding is 50% of form-wound coil operation interval effective length, the non-deformed area of pipe to be composite is made to enter the operation interval of form-wound coil, arranging discharge voltage is 9.5kV ~ 12kV, implements the processing of follow-up compound sub-step;
Five, the processing of composite bimetal pipe: the operation repeating step 4, until the composite bimetal pipe obtaining Len req.
Operation principle: electromagnetic forming machine is the pulse current of decay by actuating coil release vibration, electric current around coil excitation pulse high-intensity magnetic field so that make pipe surface produce induced-current, according to Lenz's law, the magnetic line of force is constrained in the gap between pipe and coil.Because the magnetic line of force has the characteristic of expansion, tube blank inner wall is subject to the huge magnetic field force of amplitude (see Fig. 1), this magnetic field force drives interior pipe generation plastic deformation and high-speed motion, interior pipe is always accelerated until collide with outer tube in ligament, and be closely linked with outer tube, thus the compound realized between tube layer, manufacturing process of the present invention is the mechanical bond utilizing the expanding bulging mode of light-wall pipe to realize inner and outer pipes, and manufacturing process of the present invention is applicable to the preparation of inside bearing strip composite bimetal pipe.
Compared with other techniques existing, the beneficial effect that the magnetic pulse formation process technology that present embodiment proposes reaches has:
1, be a kind of green manufacture technology, process is without ecological pollution;
2, manufacturing process is simple, and machining energy is easy to accurate control, working (machining) efficiency is high, workable;
3, impulsive force is without the need to putting on pipe by power transmission medium, reduces the friction effect of forming process, can not cause destruction and the impact of anti-corrosion layer performance on interliner alloy tubing;
4, combined strength bination can reach 0.5MPa ~ 13MPa compared with similar products, all higher than the combined strength bination (about 0.2MPa) with like product.Performance is more reliable and more stable, according to the requirement of serviceability, can do suitable adjustment to the size of combined strength bination in the scope of product standard, meet the different demands of client.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: the outer tube to be composite described in step one is carbon steel pipe.Other steps and parameter identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two unlike: the internal lining pipe to be composite described in step one is aluminum pipe.Other steps and parameter identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three unlike: the acetone purity described in step one is 99.9%.Other steps and parameter identical with one of detailed description of the invention one to three.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four unlike: the insulating materials sleeve pipe described in step 2 is nylon sleeve.Other steps and parameter identical with one of detailed description of the invention one to four.
Detailed description of the invention six: one of present embodiment and detailed description of the invention one to five unlike: the form-wound coil described in step 2 is by square-section copper conductor coiling.Other steps and parameter identical with one of detailed description of the invention one to five.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention one to six are unlike copper conductor altogether coiling 10 ~ 30 circle on the form-wound coil described in step 2.Other steps and parameter identical with one of detailed description of the invention one to six.
Detailed description of the invention eight: one of present embodiment and detailed description of the invention one to seven are unlike copper conductor altogether coiling 23 circle on the form-wound coil described in step 2.Other steps and parameter identical with one of detailed description of the invention one to seven.
Detailed description of the invention nine: one of present embodiment and detailed description of the invention one to eight unlike: the discharge voltage that arranges described in step 3 is 10kV.Other steps and parameter identical with one of detailed description of the invention one to eight.
Detailed description of the invention ten: one of present embodiment and detailed description of the invention one to nine unlike: the discharge voltage that arranges described in step 4 is 10kV.Other steps and parameter identical with one of detailed description of the invention one to nine.
Beneficial effect of the present invention is verified with following test
The magnetic pulse formation processing method of test one, a kind of inner liner bimetal composite is carried out according to the following steps:
One, the surface cleaning process of pipe to be composite: clear up with the outer surface of acetone to the inner surface of outer tube to be composite and internal lining pipe to be composite, to remove the pollutant of outer pipe internal surface to be composite and internal lining pipe outer surface to be composite, obtain the internal lining pipe to be composite after the outer tube to be composite after clearing up and cleaning;
Two, the localization and clamping of pipe to be composite: the outer surface of the internal lining pipe to be composite after the inner surface of the outer tube to be composite after the cleaning first obtained by alcohol wipe step one and cleaning, then outer tube to be composite and internal lining pipe to be composite are placed with one heart, the tube wall gap of filling outer tube to be composite and internal lining pipe two ends to be composite with nylon sleeve with guarantee outer tube to be composite and internal lining pipe to be composite coaxial, obtain the pipe to be composite after locating, then form-wound coil is inserted the pipe to be composite behind location, again form-wound coil is fixed on workbench, complete the localization and clamping of pipe to be composite,
Three, compound sub-step one is processed: arranging discharge voltage is 10kV, is realized the first step combined shaping processing of pipe to be composite, obtain the pipe to be composite after the processing of first step combined shaping by form-wound coil;
Four, follow-up compound sub-step processing: keep form-wound coil at the invariant position of workbench, pipe to be composite after first step combined shaping processing step 3 obtained axially moves relative to form-wound coil along form-wound coil by the mode of gradual feeding, the amount of feeding is 50% of form-wound coil operation interval effective length, the non-deformed area of pipe to be composite is made to enter the operation interval of form-wound coil, arranging discharge voltage is 10kV, implements the processing of follow-up compound sub-step;
Five, the processing of composite bimetal pipe: the operation repeating step 4, until the composite bimetal pipe obtaining Len req.
Outer tube to be composite described in step one is 20# steel, and physical dimension is 50mm (external diameter) × 1mm (wall thickness) × 300mm (length).
Internal lining pipe to be composite described in step one is 3A21 aluminium-alloy pipe, and physical dimension is 60mm (external diameter) × 3.5mm (wall thickness) × 300mm (length).
Acetone purity described in step one is 99.9%.
Form-wound coil described in step 2 is by the square-section copper conductor coiling of 3mm × 5mm.
Copper conductor coiling 23 circle altogether on form-wound coil described in step 2.
The effective length of the form-wound coil operation interval described in step 2 is 115mm.
The amount of feeding described in step 4 is 57.5mm.
Claims (10)
1. a magnetic pulse formation processing method for inner liner bimetal composite, is characterized in that a kind of magnetic pulse formation processing method of inner liner bimetal composite is carried out according to the following steps:
One, the surface cleaning process of pipe to be composite: clear up with the outer surface of acetone to the inner surface of outer tube to be composite and internal lining pipe to be composite, to remove the pollutant of outer pipe internal surface to be composite and internal lining pipe outer surface to be composite, obtain the internal lining pipe to be composite after the outer tube to be composite after clearing up and cleaning;
Two, the localization and clamping of pipe to be composite: the outer surface of the internal lining pipe to be composite after the inner surface of the outer tube to be composite after the cleaning first obtained by alcohol wipe step one and cleaning, then outer tube to be composite and internal lining pipe to be composite are placed with one heart, the tube wall gap of filling outer tube to be composite and internal lining pipe two ends to be composite with insulating materials sleeve pipe with guarantee outer tube to be composite and internal lining pipe to be composite coaxial, obtain the pipe to be composite after locating, then form-wound coil is inserted the pipe to be composite behind location, again form-wound coil is fixed on workbench, complete the localization and clamping of pipe to be composite,
Three, compound sub-step one is processed: arranging discharge voltage is 9.5kV ~ 12kV, is realized the first step combined shaping processing of pipe to be composite, obtain the pipe to be composite after the processing of first step combined shaping by form-wound coil;
Four, follow-up compound sub-step processing: keep form-wound coil at the invariant position of workbench, pipe to be composite after first step combined shaping processing step 3 obtained axially moves relative to form-wound coil along form-wound coil by the mode of gradual feeding, the amount of feeding is 50% of form-wound coil operation interval effective length, the non-deformed area of pipe to be composite is made to enter the operation interval of form-wound coil, arranging discharge voltage is 9.5kV ~ 12kV, implements the processing of follow-up compound sub-step;
Five, the processing of composite bimetal pipe: the operation repeating step 4, until the composite bimetal pipe obtaining Len req.
2. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the outer tube to be composite described in step one is carbon steel pipe, stainless steel tube or titanium alloy tube.
3. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the internal lining pipe to be composite described in step one is that resistivity is not more than 1.5 × 10
-7Ω m and wall thickness are not more than the tubing of 3mm.
4. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the acetone purity described in step one is 99.9%.
5. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the insulating materials sleeve pipe described in step 2 is nylon sleeve.
6. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the form-wound coil described in step 2 is by square-section copper conductor coiling.
7. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that copper conductor coiling 10 ~ 30 circle altogether on the form-wound coil described in step 2.
8. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that copper conductor coiling 23 circle altogether on the form-wound coil described in step 2.
9. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the discharge voltage that arranges described in step 3 is 10kV.
10. the magnetic pulse formation processing method of a kind of inner liner bimetal composite according to claim 1, is characterized in that the discharge voltage that arranges described in step 4 is 10kV.
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| CN106694681A (en) * | 2017-03-06 | 2017-05-24 | 华中科技大学 | Electromagnetic forming device and method of metal pipe |
| CN107096989A (en) * | 2017-06-05 | 2017-08-29 | 三峡大学 | A kind of biaxial loadings formula pipe fitting electromagnetism welds method and apparatus |
| CN107900507A (en) * | 2017-11-14 | 2018-04-13 | 哈尔滨工业大学 | The pulse current prosthetic device and method of micro-crack in a kind of metal tube |
| CN112872161A (en) * | 2021-01-11 | 2021-06-01 | 中国工程物理研究院机械制造工艺研究所 | Electromagnetic forming method of steel-lead composite pipe |
| CN113664360A (en) * | 2021-10-22 | 2021-11-19 | 湖南大学 | Magnetic pulse connecting device and method for double-layer circular tube and eddy current damper |
| CN113814309A (en) * | 2021-09-23 | 2021-12-21 | 重庆大学 | Magnetic pulse forming device suitable for high-strength thick pipe fitting |
| CN114226537A (en) * | 2021-12-15 | 2022-03-25 | 哈尔滨工业大学 | Progressive magnetic pulse forming method and device for thin-wall metal annular shell part |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694681A (en) * | 2017-03-06 | 2017-05-24 | 华中科技大学 | Electromagnetic forming device and method of metal pipe |
| CN106694681B (en) * | 2017-03-06 | 2019-03-05 | 华中科技大学 | A kind of electromagnetic forming device and method of metal tube |
| CN107096989A (en) * | 2017-06-05 | 2017-08-29 | 三峡大学 | A kind of biaxial loadings formula pipe fitting electromagnetism welds method and apparatus |
| CN107900507A (en) * | 2017-11-14 | 2018-04-13 | 哈尔滨工业大学 | The pulse current prosthetic device and method of micro-crack in a kind of metal tube |
| CN112872161A (en) * | 2021-01-11 | 2021-06-01 | 中国工程物理研究院机械制造工艺研究所 | Electromagnetic forming method of steel-lead composite pipe |
| CN113814309A (en) * | 2021-09-23 | 2021-12-21 | 重庆大学 | Magnetic pulse forming device suitable for high-strength thick pipe fitting |
| CN113664360A (en) * | 2021-10-22 | 2021-11-19 | 湖南大学 | Magnetic pulse connecting device and method for double-layer circular tube and eddy current damper |
| CN113664360B (en) * | 2021-10-22 | 2022-02-08 | 湖南大学 | Magnetic pulse connecting device and method for double-layer circular tube and eddy current damper |
| CN114226537A (en) * | 2021-12-15 | 2022-03-25 | 哈尔滨工业大学 | Progressive magnetic pulse forming method and device for thin-wall metal annular shell part |
| CN114226537B (en) * | 2021-12-15 | 2024-05-17 | 哈尔滨工业大学 | Progressive magnetic pulse forming method and device for thin-wall metal annular shell |
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| CN105013921B (en) | 2017-10-03 |
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