CN105312354A - Production method of rectangular aluminum alloy pipe - Google Patents
Production method of rectangular aluminum alloy pipe Download PDFInfo
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- CN105312354A CN105312354A CN201510871309.2A CN201510871309A CN105312354A CN 105312354 A CN105312354 A CN 105312354A CN 201510871309 A CN201510871309 A CN 201510871309A CN 105312354 A CN105312354 A CN 105312354A
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- tube
- production method
- rectangular tube
- stretching
- expand
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention relates to a production method of a rectangular aluminum alloy pipe. The production method comprises the operation procedures of performing annealing treatment on a circular pipe blank, performing transition stretching, performing shaping stretching, performing stretching and straightening, performing pipe expanding and cutting to obtain finished products. According to the technical scheme disclosed by the invention, annealing, transition stretching and shaping stretching are performed on the circular pipe blank, and finally straightening and pipe expanding treatment are performed so that the rectangular pipe with smooth surface is obtained; the problems that the metal chip quantity is large, the metal wastage is serious, the production efficiency is low, and only the rectangular pipe with shorter length can be processed existing in machining, stretching and shaping can be solved; besides, the problem of poor precision of the external dimensions existing in the rectangular pipe produced by an extruding technology is also solved.
Description
Technical field
The present invention relates to a kind of production method of tubing, particularly relate to a kind of production method of aluminum rectangular tube.
Background technology
Aluminum rectangular tube is generally by technological formings such as machined, extruding or stretchings.But machined and extruding all exist a lot of shortcoming, such as, the borings amount of process for machining is large, and metal waste is serious, and production efficiency is low, and can only the shorter rectangular tube of processing length.The rectangular tube that extrusion process is produced, its appearance and size low precision, and the large gauge rectangular tube that wall thickness thicker (>=15mm) can only be processed, and owing to there being seam to stitch, therefore tubing bearing capacity is not enough.
Summary of the invention
The object of the present invention is to provide a kind of precision high and the production method of the aluminum rectangular tube of chip can not be produced.
The object of the present invention is achieved like this, a kind of production method of aluminum rectangular tube, comprises circular tube blank annealing in process, transition stretching, shaping stretching, tension straingtening, expand tube and cut finished product process.Technical solution of the present invention stretches through transition after circular tube blank being annealed, carry out shaping stretching again, the rectangular tube of surfacing is obtained finally by aligning and expand tube process, the borings amount overcoming the existence of machined drawing and forming is large, metal waste is serious, production efficiency is low, and can only the problem of the shorter rectangular tube of processing length, also overcomes the problem that extrusion process produces the appearance and size low precision that rectangular tube exists.
In order to the larger-size rectangular tube of stretched length and width, above-mentioned transition is stretched as and pipe is stretched as elliptical tube.
In order to ensure yield rate, elliptical tube is stretched as rectangular tube by above-mentioned shaping being stretched as.
Further, the length-width ratio of above-mentioned rectangular tube and A/B >=2.
In order to ensure the dimensional accuracy of rectangular tube, after above-mentioned expand tube, being cut into before product and also having tension straingtening operation.
In order to improve the dimensional accuracy of rectangular tube further, above-mentioned expand tube is undertaken by expand tube core print.
For the ease of operating and realizing expand tube, above-mentioned expand tube core print comprises zone of swelling and entrance band, and entrance band is flaring type.
In order to ensure the precision of rectangular tube, the length of above-mentioned zone of swelling and the wide length slightly larger than rectangular tube finished product and wide.
In order to not scratch rectangular tube inner surface, the above-mentioned limit of expand tube core print outer surface and the junction on limit are arc.
For the ease of operating and not affecting expand tube effect, the center of above-mentioned expand tube core print is provided with the connecting hole be connected with drive rod.
In order to easy to connect, establish screw thread in above-mentioned connecting hole, drive rod and expand tube core print are threaded connection.
In order to structure is simple and firm, above-mentioned connecting hole is through hole.
The present invention has following beneficial effect:
1, the present invention stretches through transition after circular tube blank being annealed, carry out shaping stretching again, the rectangular tube of surfacing is obtained finally by aligning and expand tube process, the borings amount overcoming the existence of machined drawing and forming is large, metal waste is serious, production efficiency is low, and can only the problem of the shorter rectangular tube of processing length, also overcomes the problem that extrusion process produces the appearance and size low precision that rectangular tube exists.
2, the production method of aluminum rectangular tube of the present invention is simple to operate, is easy to realize.
Accompanying drawing explanation
Fig. 1 is the drawing process schematic diagram of the production method of aluminum rectangular tube of the present invention;
Fig. 2 is the stage die structural representation in the production method of aluminum rectangular tube of the present invention;
Fig. 3 is the tooling structre schematic diagram in the production method of aluminum rectangular tube of the present invention;
Fig. 4 is the expand tube core head structure schematic diagram in the production method of aluminum rectangular tube of the present invention;
Fig. 5 carries out expand tube schematic diagram with expand tube core print in the production method of aluminum rectangular tube of the present invention.
In figure, 1. circular tube blank, 2. elliptical tube, 3. rectangular tube, 4. stage die, 5. finishing die, 6. expand tube core print, 6-1. zone of swelling, 6-2. entrance band, 7. connecting hole.
Detailed description of the invention
Embodiment, a kind of production method of aluminum rectangular tube, see Fig. 1, Fig. 2, Fig. 3, its process route is: it is rectangular tube 3 → tension straingtening → expand tube → tension straingtening → be cut into product, sampling → packaging that the annealing → transition of circular tube blank 1 → woollen is stretched as elliptical tube 2 → form drawing, warehouse-in.
Rectangular tube 3 i.e. cross section is the aluminium alloy pipe of rectangle (or similar rectangle).
In the present embodiment, finished product is large gauge rectangle thin wall pipe, i.e. diagonal line length >=the 200mm of rectangular tube, wall thickness≤10mm, length-width ratio >=2 of rectangular tube.Such as: 230 × 100 × 6,240 × 100 × 5,285 × 100 × 6 equal-specification rectangular tubes.
Transition is stretched as and circular tube blank 1 is stretched as elliptical tube 2, and elliptical tube 2 is stretched as rectangular tube 3 by shaping being stretched as.
Drawing process needs to use corresponding mould, and mould comprises stage die 4, finishing die 5 and expand tube core print 6.Finishing die 5 ensures the appearance and size precision of rectangular tube 3.
Under additional pulling force effect, force metal circular tube woollen 1 to be stretched as elliptical tube 2 by the hole crossing plating mould 4, then obtain rectangular tube 3. by the hole of finishing die 5.
Stretch in producing, due to the inhomogeneities of metal flow, after often stretching, rectangle 3 is managed and just be there will be indent phenomenon, there will be collapse phenomenon inward, eliminate interior concave defect by expand tube core print 6 in the middle of longer wide-edge.
See Fig. 4, Fig. 5, expand tube core print 6 comprises zone of swelling 6-1 and entrance band 6-2, and entrance band 6-2 is flaring type.
The length of zone of swelling 6-1 and the wide length slightly larger than rectangular tube 3 finished product and wide.
The limit of expand tube core print 6 outer surface and the junction on limit are arc.
The center of expand tube core print 6 is provided with the connecting hole 7 be connected with drive rod.
Establish screw thread in connecting hole 7, drive rod and expand tube core print are threaded connection.
Connecting hole 7 is through hole, also can be blind hole.
In the present embodiment, expand tube core print 6 is hollow.Expand tube core print 6 also can be solid.
In technical solution of the present invention, aluminium alloy big-size thinning plastic rectangular tube 3 is obtained by drawing and forming by circular tube blank 1, the appearance and size precision of rectangular tube 3 is high (comprising plane clearance, perpendicularity, flexibility, concentricity etc.), wall thickness is thin and even, tubing solderless joint close, and delivery length is longer.
For wall thickness rectangular tubes such as aluminium alloys, can go out to wait the pipe of wall thickness by extruding or drawing, then pass through stage die, finishing die, make it form the tubing of the sections such as required square, rectangle, hexagon, ellipse.
Claims (10)
1. a production method for aluminum rectangular tube, is characterized in that: comprise circular tube blank annealing, transition stretching, shaping stretching, tension straingtening, expand tube and cut finished product process.
2. the production method of aluminum rectangular tube as claimed in claim 1, is characterized in that: described transition is stretched as and pipe is stretched as elliptical tube.
3. the production method of aluminum rectangular tube as claimed in claim 1 or 2, is characterized in that: elliptical tube is stretched as rectangular tube by described shaping being stretched as.
4. the production method of aluminum rectangular tube as claimed in claim 3, is characterized in that: the length-width ratio of described rectangular tube and A/B >=2.
5. the production method of aluminum rectangular tube as claimed in claim 1 or 2, is characterized in that: after described expand tube, be cut into product before also have tension straingtening operation.
6. the production method of aluminum rectangular tube as claimed in claim 1 or 2, is characterized in that: described expand tube is undertaken by expand tube core print (6).
7. the production method of aluminum rectangular tube as claimed in claim 6, it is characterized in that: described expand tube core print (6) comprises zone of swelling (6-1) and entrance band (6-2), described entrance band (6-2) is flaring type.
8. the production method of aluminum rectangular tube as claimed in claim 7, is characterized in that: the size of described zone of swelling (6-1) is slightly larger than the size of rectangular tube (3) finished product.
9. the production method of aluminum rectangular tube as claimed in claim 6, is characterized in that: the described limit of expand tube core print (6) outer surface and the junction on limit are arc.
10. the production method of aluminum rectangular tube as claimed in claim 6, is characterized in that: described expand tube core print (6) is provided with the connecting hole (7) be connected with drive rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510871309.2A CN105312354A (en) | 2015-12-02 | 2015-12-02 | Production method of rectangular aluminum alloy pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510871309.2A CN105312354A (en) | 2015-12-02 | 2015-12-02 | Production method of rectangular aluminum alloy pipe |
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| CN105312354A true CN105312354A (en) | 2016-02-10 |
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| CN201510871309.2A Pending CN105312354A (en) | 2015-12-02 | 2015-12-02 | Production method of rectangular aluminum alloy pipe |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271457A (en) * | 2016-09-13 | 2017-01-04 | 绵阳晟昊光电科技有限公司 | A kind of photocell is by many wall thickness many specifications precision square tube production technologies |
| CN106271458A (en) * | 2016-09-19 | 2017-01-04 | 江西恒动新能源有限公司 | A kind of process technology of square power lithium ion cell aluminum hull |
| CN106346200A (en) * | 2016-09-23 | 2017-01-25 | 成都九十度工业产品设计有限公司 | Production process of precision square tube for steel structure |
| WO2018023211A1 (en) * | 2016-07-30 | 2018-02-08 | 东莞市博艾德通信器材有限公司 | Processing method for usb type-c metal housing |
| CN107737816A (en) * | 2017-12-02 | 2018-02-27 | 山东新纪元特钢有限公司 | A kind of right angle square tube |
| CN107756142A (en) * | 2016-08-23 | 2018-03-06 | 河南省大方重型机器有限公司 | A kind of rectangular tube ellipse forming frock |
| CN107876578A (en) * | 2017-11-21 | 2018-04-06 | 西南铝业（集团）有限责任公司 | A kind of production method of rectangular tube |
| CN109216599A (en) * | 2017-06-30 | 2019-01-15 | 苏州新睿琪金属科技有限公司 | A kind of new energy lithium battery thin-walled aluminum hull and production technology |
| CN110778803A (en) * | 2019-10-30 | 2020-02-11 | 西安圣泰金属材料有限公司 | Thin-wall high-precision titanium alloy seamless square and rectangular pipe and manufacturing method and application thereof |
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2015
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018023211A1 (en) * | 2016-07-30 | 2018-02-08 | 东莞市博艾德通信器材有限公司 | Processing method for usb type-c metal housing |
| CN107756142A (en) * | 2016-08-23 | 2018-03-06 | 河南省大方重型机器有限公司 | A kind of rectangular tube ellipse forming frock |
| CN106271457A (en) * | 2016-09-13 | 2017-01-04 | 绵阳晟昊光电科技有限公司 | A kind of photocell is by many wall thickness many specifications precision square tube production technologies |
| CN106271458A (en) * | 2016-09-19 | 2017-01-04 | 江西恒动新能源有限公司 | A kind of process technology of square power lithium ion cell aluminum hull |
| CN106346200A (en) * | 2016-09-23 | 2017-01-25 | 成都九十度工业产品设计有限公司 | Production process of precision square tube for steel structure |
| CN109216599A (en) * | 2017-06-30 | 2019-01-15 | 苏州新睿琪金属科技有限公司 | A kind of new energy lithium battery thin-walled aluminum hull and production technology |
| CN107876578A (en) * | 2017-11-21 | 2018-04-06 | 西南铝业（集团）有限责任公司 | A kind of production method of rectangular tube |
| CN107737816A (en) * | 2017-12-02 | 2018-02-27 | 山东新纪元特钢有限公司 | A kind of right angle square tube |
| CN110778803A (en) * | 2019-10-30 | 2020-02-11 | 西安圣泰金属材料有限公司 | Thin-wall high-precision titanium alloy seamless square and rectangular pipe and manufacturing method and application thereof |
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Application publication date: 20160210 |
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