CN104741413A - Preparation method of super-long large thin-wall precision aluminum alloy pipe - Google Patents
Preparation method of super-long large thin-wall precision aluminum alloy pipe Download PDFInfo
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- CN104741413A CN104741413A CN201310741173.4A CN201310741173A CN104741413A CN 104741413 A CN104741413 A CN 104741413A CN 201310741173 A CN201310741173 A CN 201310741173A CN 104741413 A CN104741413 A CN 104741413A
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- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
Abstract
The invention discloses a preparation method of a super-long large thin-wall precision aluminum alloy pipe and belongs to the technical field of metal processing. The preparation method comprises the following steps of taking an extruded aluminum alloy blank material with specified length, carrying out fine lathing processing on inner and outer surfaces and end surfaces, carrying out fine frosting on the inner and outer surfaces, carrying out spinning processing 3-5 times, removing spinning pressure residual and the fine frosted outer surface, carrying out rolling 3-4 times to obtain a product, carrying out heat treatment on the rolled pipe and carrying out straightening to obtain a finished pipe. The super-long large thin-wall precision aluminum alloy pipe obtained by the preparation method has a radius-thickness ratio greater than 60, pipe diameter greater than 60mm, wall thickness less than 1mm and length greater than 6000mm. The preparation method has advantages of pipe processes such as integrated extrusion, pressing and rolling and can prepare the super-long large thin-wall precision aluminum alloy pipe.
Description
Technical field
The present invention relates to a kind of preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe, belong to metal working technical area.
Background technology
Overlength big-size thinning plastic Precision Aluminum compo pipe is mainly used in space flight, aviation, atomic energy, the high-tech areas such as weapon, because aluminium alloy density is little, and surface easily forms the oxide-film of one deck densification, and interior metal can be stoped to be oxidized further, due to these characteristics of aluminium alloy, play very important irreplaceable effect in these fields.And the processing method of aluminium-alloy pipe mainly contains extruding, rolling, drawing, the methods such as spinning, various production method all has its pluses and minuses, and extrusion efficiency comparison is high, but low precision; Spinning process precision comparison is high, and structure property is good, but the length of pipe is subject to many restrictions; Rolling precision comparison is high, and structure property is good, and the pipe of energy production overlength, but efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of processing technology of preparing of overlength big-size thinning plastic Precision Aluminum compo pipe, aluminium-alloy pipe prepared by the inventive method is in space flight, and aviation, atomic energy, the industrial circles such as weapon play an important role, and have good application prospect.
Technology contents of the present invention is as follows:
A preparation method for overlength big-size thinning plastic Precision Aluminum compo pipe, comprises the following steps:
(1) the extrusion billet pipe of fixed length is intercepted; By the inside and outside surface of blank pipe car and end face; Then the inside and outside surface of sand paper sand is used;
(2) pipe of step (1) gained is carried out multi-pass spinning processing; Then remove more than spinning pressure, washed ore outer surface;
(3) tubing that step (2) obtains is carried out multi-pass rolling on accurate multi-roll cold reducing mill, obtain the tubing of trimmed size;
(4) tubing that step (3) obtains is heat-treated, aligned, obtain finished product tubing.
Described in step (1), the thickness of extrusion billet pipe is at 15mm ~ 18mm; Extrusion billet pipe intercepted length is 400mm ~ 500mm.
Behind the inside and outside surface of car, the thickness of pipe is at 12mm ~ 14mm in step (1), and thickness and precision controls within ± 0.05mm, and linearity is within ± 0.01mm, and axiality is within ± 0.01mm, and Roughness Surface on Control is at below Ra3.2.
Described in step (1) by the method on the inside and outside surface of sand paper sand be: use 400 orders and 600 object sand paper washed ore inner surface and outer surfaces respectively, make roughness at below Ra1.6.
The method of the processing of multi-pass spinning described in step (2) is: aluminium-alloy pipe carries out 3 ~ 4 road heat and revolves and revolve with 1 road is cold, and described heat revolves pass deformation between 20% ~ 53%; Describedly coldly to revolve, deflection between 5% ~ 20%, heat revolve and cold total deformation of revolving between 65% ~ 80%, after spinning, wall thickness is at 3mm ~ 5mm, and length is at 1400mm ~ 2000mm.
Described in step (2), the method for washed ore outer surface is: use 400 orders and 600 object sand paper washed ore outer surfaces respectively, make roughness at below Ra1.6.
The described process of carrying out multi-pass rolling on accurate multi-roll cold reducing mill of step (3) is: carry out 3 ~ 4 passes, pass deformation is 20% ~ 60%, total deformation is 80% ~ 85%, final wall thickness control is at 0.5mm ~ 1mm, length, at 6000mm ~ 13000mm, obtains the tubing of trimmed size.
Heat treatment described in step (4) is annealing or solution treatment, and annealing temperature is 380 ~ 480 DEG C, and solid solubility temperature is 480 ~ 520 DEG C.
Align described in step (4), if heat treatment is solution treatment, the pipe after solution treatment carries out Ageing Treatment after aligning, obtains production tube.
The invention has the advantages that: the present invention comprehensively extrudes, the advantage of three kinds of tubular object extruding techniques of spinning and rolling, avoid it not enough, overlength big-size thinning plastic Precision Aluminum compo pipe can be processed.
Detailed description of the invention
Below in conjunction with embodiment in detail this invention is described in detail:
Embodiment 1: the preparation of accurate 2A12 aluminium-alloy pipe (φ 62*0.5) of overlength big-size thinning plastic.
The aluminium alloy extruded pipe external diameter of 2A12 is 91mm, and thickness is 15mm, is cut into the pipe of length at 400mm; Become by its car external diameter to be 89mm, thickness is the pipe of 15 ± 0.05mm, then carries out polishing with the sand paper of 400# and 600# respectively; Pipe after polishing carries out the hot supination of three passages and carries out that a time is cold revolves at 250 ~ 300 DEG C, and technique is as following table 1.More than the materials in the tube excision pressure of cold supination, then with the sand paper of 400# and 600#, polishing is carried out to outer surface respectively; Tubing after polishing carries out three passage finish rolling again, and be rolled into the tubing of the trimmed size of 62*0.5, rolling mill practice is in table 2; The tubing of trimmed size carries out solution treatment at the temperature of 495 ~ 505 DEG C; Tubing after solid solution is being aligned at multi-roll straightening machine; Tubing after aligning is at 185 ~ 195 DEG C
The laggard line space of insulation 6 ~ 12h is cold, obtains finished product tubing.
Table 1. spinning process
Table 2. rolling mill practice
| External diameter | Thickness | Internal diameter | Pass deformation | Total deformation | |
| Blank | 69 | 3 | 63 | — | — |
| First passage | 66.5 | 1.5 | 63.7 | 50.8% | 50.8% |
| Second passage | 63.5 | 0.8 | 61.9 | 48.6% | 74.7% |
| 3rd passage | 62 | 0.5 | 61 | 38.7% | 84.5% |
Embodiment 2: the preparation of accurate 3A21 aluminium-alloy pipe (62*0.8) of overlength big-size thinning plastic.
The aluminium alloy extruded pipe diameter of 3A21 is 92mm, and thickness, at 18mm, is cut into the pipe of length at 450mm; Become by its car external diameter to be 90mm, thickness, at the pipe of 14 ± 0.05mm, then carries out polishing with the sand paper of 400# and 600# respectively; Pipe after polishing carries out the hot supination of three passages and carries out that a time is cold revolves at 240 ~ 280 DEG C, and technique is as following table 3.More than the materials in the tube excision pressure of cold supination, then with the sand paper of 400# and 600#, polishing is carried out to outer surface respectively; Tubing after polishing carries out three passage finish rolling again, and be rolled into the tubing of the trimmed size of 62*0.8, rolling mill practice is in table 4; The tubing of trimmed size is annealed at 395 ~ 415 DEG C, and the pipe after annealing is rescued on multi-roll straightening machine, obtains finished product tubing.
Table 3. spinning process
Table 4 rolling mill practice
| External diameter | Thickness | Internal diameter | Pass deformation | Total deformation | |
| Blank | 70 | 4 | 62 | — | — |
| First passage | 66.5 | 2.5 | 61.5 | 39.4% | 39.4% |
| Second passage | 63.5 | 1.2 | 61.1 | 53.3% | 71.7% |
| 3rd passage | 62 | 0.8 | 60.4 | 34.5% | 81.5% |
Embodiment 3: the preparation of accurate 5A06 aluminium-alloy pipe (φ 75*1) of overlength big-size thinning plastic.
The aluminium alloy extruded pipe diameter of 5A06 is 105mm, and thickness, at 18mm, is cut into the pipe of length at 500mm; Use lathe, become by its car external diameter to be 103mm, thickness, at the pipe of 14 ± 0.05mm, then carries out polishing with the sand paper of 400# and 600# respectively; Pipe after polishing carries out three passage heat and revolves at 300 ~ 350 DEG C, and a time is cold revolves, and technique is as following table 5.More than the materials in the tube excision pressure of cold supination, then with the sand paper of 400# and 600#, polishing is carried out to outer surface respectively; Tubing after polishing carries out three passage finish rolling again, and be rolled into the tubing of the trimmed size of 75*1, rolling mill practice is in table 6; The tubing of trimmed size carries out solution treatment at the temperature of 495 ~ 505 DEG C; Tubing after solid solution is being aligned at multi-roll straightening machine; Tubing after aligning to be incubated after 6 ~ 12h 300 DEG C of insulations again 8 hours at 495 ~ 510 DEG C, i.e. artificial aging, obtains finished product tubing.
Table 5. spinning process
Table 6. rolling mill practice
| External diameter | Thickness | Internal diameter | Pass deformation | Total deformation | |
| Blank | 85 | 5 | 75 | — | — |
| First passage | 80 | 3.5 | 73 | 33.1% | 33.1% |
| Second passage | 76.5 | 1.5 | 73.5 | 58.0% | 71.9% |
| 3rd passage | 75 | 1 | 73 | 34.2% | 81.5% |
Embodiment 4: the preparation of accurate 6061 aluminium-alloy pipes (φ 70*0.6) of overlength big-size thinning plastic.
The aluminium alloy extruded pipe diameter of 2A12 is 98mm, and thickness, at 17mm, is cut into the pipe of length at 500mm; Use lathe, become by its car external diameter to be 96mm, thickness, at the pipe of 12 ± 0.05mm, then carries out polishing with the sand paper of 400# and 600# respectively; Pipe after polishing carries out the hot supination of three passages and carries out that a time is cold revolves at 280 ~ 320 DEG C, and technique is as following table 7.More than the materials in the tube excision pressure of cold supination, then with the sand paper of 400# and 600#, polishing is carried out to outer surface respectively; Tubing after polishing carries out three passage finish rolling again, and be rolled into the tubing of the trimmed size of 70*0.6, rolling mill practice is in table 8; The tubing of trimmed size is incubated solid solution in 2 hours at 530 DEG C; Tubing after solid solution is being aligned at multi-roll straightening machine; Tubing after aligning is incubated 3 hours and carries out artificial aging at 180 DEG C, obtains finished product tubing.
Table 7. spinning process
Table 8. rolling mill practice
| External diameter | Thickness | Internal diameter | Pass deformation | Total deformation | |
| Blank | 80 | 4 | 72 | — | — |
| First passage | 75 | 2.5 | 70 | 40.4% | 40.4% |
| Second passage | 62.5 | 1.6 | 59.3 | 46.2% | 67.9% |
| 3rd passage | 70 | 0.6 | 68.8 | 57.3% | 86.3% |
Claims (9)
1. a preparation method for overlength big-size thinning plastic Precision Aluminum compo pipe, is characterized in that, comprise the following steps:
(1) the extrusion billet pipe of fixed length is intercepted; By the inside and outside surface of blank pipe car and end face; Then the inside and outside surface of sand paper sand is used;
(2) pipe of step (1) gained is carried out multi-pass spinning processing; Then remove more than spinning pressure, washed ore outer surface;
(3) tubing that step (2) obtains is carried out multi-pass rolling on accurate multi-roll cold reducing mill, obtain the tubing of trimmed size;
(4) tubing that step (3) obtains is heat-treated, aligned, obtain finished product tubing.
2. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, is characterized in that: described in step (1), the thickness of extrusion billet pipe is at 15mm ~ 18mm; Extrusion billet pipe intercepted length is 400mm ~ 500mm.
3. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, it is characterized in that: behind the middle inside and outside surface of car of step (1), the thickness of pipe is at 12mm ~ 14mm, thickness and precision controls within ± 0.05mm, linearity is within ± 0.01mm, axiality is within ± 0.01mm, and Roughness Surface on Control is at below Ra3.2.
4. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, it is characterized in that: described in step (1) by the method on the inside and outside surface of sand paper sand be: use 400 orders and 600 object sand paper washed ore inner surface and outer surfaces respectively, make roughness at below Ra1.6.
5. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, it is characterized in that: the method for the processing of multi-pass spinning described in step (2) is: aluminium-alloy pipe carries out 3 ~ 4 road heat and revolves and revolve with 1 road is cold, and described heat revolves pass deformation between 20% ~ 53%; Describedly coldly to revolve, deflection between 5% ~ 20%, heat revolve and cold total deformation of revolving between 65% ~ 80%, after spinning, wall thickness is at 3mm ~ 5mm, and length is at 1400mm ~ 2000mm.
6. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, it is characterized in that: described in step (2), the method for washed ore outer surface is: use 400 orders and 600 object sand paper washed ore outer surfaces respectively, make roughness at below Ra1.6.
7. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, its feature exists: the described process of carrying out multi-pass rolling on accurate multi-roll cold reducing mill of step (3) is: carry out 3 ~ 4 passes, pass deformation is 20% ~ 60%, total deformation is 80% ~ 85%, final wall thickness control is at 0.5mm ~ 1mm, length, at 6000mm ~ 13000mm, obtains the tubing of trimmed size.
8. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, its feature exists: heat treatment described in step (4) is annealing or solution treatment, and annealing temperature is 380 ~ 480 DEG C, and solid solubility temperature is 480 ~ 520 DEG C.
9. the preparation method of overlength big-size thinning plastic Precision Aluminum compo pipe according to claim 1, its feature exists: align described in step (4), if heat treatment is solution treatment, the pipe after solution treatment carries out Ageing Treatment after aligning, obtains production tube.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160744A (en) * | 2017-12-29 | 2018-06-15 | 西南铝业（集团）有限责任公司 | A kind of preparation method of the high aluminum alloy conduit of inner surface quality |
| CN108213110A (en) * | 2017-12-29 | 2018-06-29 | 西南铝业（集团）有限责任公司 | A kind of preparation method of catheter blank and aluminum alloy conduit |
| CN109940059A (en) * | 2017-12-21 | 2019-06-28 | 北京有色金属研究总院 | A kind of preparation method of precise thin-wall large-diameter aluminium alloy pipe |
| CN114260332A (en) * | 2021-11-11 | 2022-04-01 | 江苏万峰铝业有限公司 | Processing technology of high-precision thin-wall pure aluminum or aluminum alloy pipe |
| CN114602996A (en) * | 2022-03-25 | 2022-06-10 | 宝银特种钢管有限公司 | Manufacturing method of ultrathin seamless tube for high-end equipment system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940059A (en) * | 2017-12-21 | 2019-06-28 | 北京有色金属研究总院 | A kind of preparation method of precise thin-wall large-diameter aluminium alloy pipe |
| CN108160744A (en) * | 2017-12-29 | 2018-06-15 | 西南铝业（集团）有限责任公司 | A kind of preparation method of the high aluminum alloy conduit of inner surface quality |
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| CN108213110B (en) * | 2017-12-29 | 2020-02-18 | 西南铝业（集团）有限责任公司 | Preparation method of conduit blank and aluminum alloy conduit |
| CN114260332A (en) * | 2021-11-11 | 2022-04-01 | 江苏万峰铝业有限公司 | Processing technology of high-precision thin-wall pure aluminum or aluminum alloy pipe |
| CN114602996A (en) * | 2022-03-25 | 2022-06-10 | 宝银特种钢管有限公司 | Manufacturing method of ultrathin seamless tube for high-end equipment system |
| CN114602996B (en) * | 2022-03-25 | 2023-01-24 | 宝银特种钢管有限公司 | Manufacturing method of ultrathin seamless tube for high-end equipment system |
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Effective date of registration: 20190312 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |