CN1346718A - Process for preparing seamless composite metal pipe - Google Patents
Process for preparing seamless composite metal pipe Download PDFInfo
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- CN1346718A CN1346718A CN 01127469 CN01127469A CN1346718A CN 1346718 A CN1346718 A CN 1346718A CN 01127469 CN01127469 CN 01127469 CN 01127469 A CN01127469 A CN 01127469A CN 1346718 A CN1346718 A CN 1346718A
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Abstract
A method for manufacturing seamless composite metal pipe includes high-temp anealing and natural cooling of internal pipe, washing the internal and external pipes, inserting internal pipe in external pipe, mounting the blank to mandrel of pipe drawer, installing inner mould, drawing, sleeving outer mould on it, pulling-down, straightening and cutting. Its advantages are high strength, easy machining, low cost, high quality and high smooth finish.
Description
Technical field
The present invention relates to the metal tube process technology, especially a kind of preparation technology of seamless composite metal pipe.
Background technology
Metal composite pipe is widely used owing to having the unexistent premium properties of common metal single tube.At present, the preparation method of metal composite pipe after adopting two kinds of metallic plates to be processed into composite metal plate, is rolled into cast and is welded into outside the pipe, most of employing cold roll forming, welding cladding explained hereafter.Yet put into practice verifiedly, there are many deficiencies in this technology of preparing: the one, and the welding equipment costliness, production cost is than higher; The 2nd, the inside and outside two-layer combination of composite metal pipe gets defective tightness, even leaves the gap; The 3rd, the external pipe surface weld is obvious, and the easy fouling of the weld seam of inside pipe wall, influences the speed of tube fluid; The 4th, product specification is single, complicated process of preparation.In order to change the production method of welding cladding, Chinese patent application number is 001272918, publication number is CN1290579A, denomination of invention is " manufacture method of multiple metal composite pipe ", proposed parent tube and multiple tube branch come and made respectively, utilize sleeve technology equipment that two kinds of pipes are nested together then and make composite pipe blank, utilize cold extruding technique equipment to make multiple tube again.This preparation method compares with welding cladding technology, and the multiple tube of making is tight in conjunction with comparing, and mass ratio is better, and technology is easy, and equipment investment is few, metal composite pipe that can the production plurality of specifications.But the major defect that this preparation method exists is to utilize cold extruding technique equipment to carry out inner wall tube not being carried out annealing in process before the drawing processing, just carrying out the cold extrusion drawing before not changing original rigidity intensity of inner wall tube and toughness handles, therefore will influence the drawing composite quality, the compound tight ness rating of multiple tube is just poor.
Summary of the invention
Purpose of the present invention just is to overcome or improve the deficiencies in the prior art, and the preparation method of the seamless composite metal pipe that a kind of technology is simple, easy to operate, composite denseness strong, the composite pipe quality is high is provided.
The object of the present invention is achieved like this: earlier inner wall tube is carried out annealing in process, in the rigidity that reduces the inwall steel pipe, strengthen on the basis of its toughness, with two kinds of synthetic composite pipe blanks of metal tube cover, utilize bench to carry out expand tube and pulling-down processing again, two kinds of metal tubes are made the seamless composite metal pipe of the high deep processings such as can fully welding, bend of compound tight ness rating.The present invention is except carrying out double layer of metal pipe compound, and it is compound to carry out repeatedly cold extrusion to the multiple layer metal pipe, makes multi-layer composite metal pipe.
Specifically, the preparation method of seamless composite metal pipe of the present invention comprises the following steps:
(1) annealing is carried out high annealing with inner wall tube, naturally cooling;
(2) clean, the inner wall tube after external pipe and the annealing is carried out cleaning treatment;
(3) fit pierces into the synthetic composite pipe blank of cover in the external pipe with inner wall tube;
(4) expand tube at an end opening of composite pipe blank, is installed in pipe on the plug of bench, puts into internal mold, carries out the drawing expand tube then and handles;
(5) the compound body openend after the expand tube processing is taken the lead in pulling-down shaping, dwindles the caliber of tube head, puts into internal mold then, puts external mold, carries out the pulling-down shaping and handles;
(6) alignment, cutting, after alignment on the inspection machine, length according to the rules cuts into finished product with the multiple tube of finishing the breathing drawing.
Said inner wall tube is a copper tube.
Said inner wall tube is a carbon steel pipe.
Said inner wall tube is the straight carbon steel welded tube.
Said inner wall tube is a seamless metal pipe.
Said external pipe is a stainless-steel thin-wall pipe.
Said external pipe is the straight carbon steel pipe.
Said external pipe is a Bao Bi TA metal tube.
The present invention has following beneficial effect:
The one, inner wall tube and external pipe are compound tightr.Owing at first inner wall tube is carried out annealing in process before compound, reducing the inner wall tube rigidity, increasing on the basis of toughness, carry out fit and expand tube pulling-down again and handle, so combine closelyr between inner wall tube and the outer multiple tube.After tested, the pull-off strength of multiple tube is greater than 85MPa, and deep processing such as can also weld, bend.
The 2nd, the preparation method is simpler.Compound body after expand tube is handled can with pulling-down and integer is disposable be finished, and does not need to carry out deburring, reconditioning and polishing again, has reduced operation, shortened process time, and the body outward appearance is highly polished, and bearing capacity is big, non-resistance, non-scaling in the pipe.
The 3rd, the multiple tube that the present invention prepares.Its inner wall tube and external pipe can adopt the pipe of different steel grades, different metal, available copper pipe or titanium pipe, also available ordinary carbon steel pipe, high quality carbon steel pipe and alloy pipe etc. are selected different tubing for use according to different purposes and requirement, the metal composite pipe of preparation different series.
The specific embodiment
The invention will be further described below in conjunction with embodiments of the invention:
The preparation method of seamless composite metal pipe of the present invention, main points are will at first carry out annealing in process for the metal tube as inner wall tube, reducing its rigidity, strengthening on the basis of toughness, again with two kinds of synthetic composite pipe blanks of metal tube cover, utilize bench to carry out expand tube and pulling-down processing again, two kinds of metal tubes are closely combined, make the seamless metal pipe that two or more metal tubes are combined into one.
Embodiment 1
The outer multiple tube preparation method of stainless steel: the outer multiple tube of stainless steel, selecting external diameter for use is 21mm, pipe thickness is that the carbon steel pipe of 2mm is an inner wall tube; Selecting external diameter for use is 22mm, and pipe thickness is that the stainless-steel thin-wall pipe of 0.4mm is an external pipe, and its step of manufacturing comprises:
1, annealing, the carbon steel pipe that will be used for inner wall tube is made The high temperature anneal, naturally cooling;
2, cleaning, is that external pipe carries out cleaning treatment to carbon steel pipe and the stainless-steel thin-wall pipe that is used for inner wall tube after the annealing in process;
3, fit pierces into the inner wall tube of annealing in process in the stainless steel jointless external pipe, the synthetic composite pipe blank of cover;
4, expand tube is opened the openning that a length is about 15cm at an end of composite pipe blank, pipe is installed on the plug of bench, puts into internal mold, carries out the drawing expand tube then and handles; Expand tube reducing 0.2mm closely combines inner wall tube and external pipe.
5, pulling-down integer is taken the lead the compound body peristome after the expand tube processing, dwindles the caliber of tube head, form the diminishing drawing head of front end, put into internal mold then, put external mold, carry out pulling-down with bench and handle, in the process of pulling-down, finish shaping simultaneously and handle.
6, alignment, cutting will be finished metal composite pipe alignment on straightener that expand tube, pulling-down and shaping are handled, and length according to the rules cuts into finished product then.
Embodiment 2
The preparation method of copper multiple tube: the copper multiple tube, selecting external diameter for use is that 15mm, pipe thickness are that the straight carbon steel pipe of 2mm is made external pipe, and selecting external diameter 10.8mm, pipe thickness for use is that the copper tube of 0.4mm is an inner wall tube, and the step of its preparation method comprises:
1, annealing, the copper tube that will be used for inner wall tube is made The high temperature anneal, naturally cooling;
2, clean, copper tube that is used for inner wall tube after the annealing in process and the straight carbon steel pipe that is used for external pipe are carried out cleaning treatment;
3, fit pierces into the inner wall tube after the annealing in process the synthetic composite pipe blank of cover in the external pipe of straight carbon steel pipe;
4, expand tube is opened the openning that a length is about 10cm at an end of composite pipe blank, pipe is installed on the plug of bench, puts into internal mold, carries out the drawing expand tube then and handles; Expand tube reducing 0.2mm closely combines inner wall tube and external pipe.
5, the composite pipe blank peristome after the expand tube processing is taken the lead in pulling-down shaping, dwindles the caliber of tube head, form the diminishing drawing head of front end, put into internal mold then, put external mold, carry out pulling-down with bench and handle, in the process of pulling-down, finish shaping simultaneously and handle.
6, alignment, cutting will be finished metal composite pipe alignment on straightener that expand tube, pulling-down and shaping are handled, and length according to the rules cuts into finished product then.
Embodiment 3
The multi-layer composite metal pipe preparation method: multi-layer composite metal pipe, selecting external diameter for use is that 25mm, pipe thickness are that the stainless-steel thin-wall pipe of 0.5mm is an external pipe, selecting external diameter for use is that 23.8mm, pipe thickness are that the straight carbon steel welded tube of 1mm is the metallic intermediate layer pipe; Selecting external diameter for use is that 21.6mm, pipe thickness are that the copper tube of 0.4mm is an inner wall tube.The method of its manufacture method and manufactured copper multiple tube is roughly the same, and different is the fit of many layer of metal, just increases by one expand tube and draws operation.Advanced interline layer metal tube and external pipe compound carries out compound with inner wall tube again.Concrete steps comprise:
1, annealing will be used for the copper tube of inner wall tube and the straight carbon steel welded tube of metallic intermediate layer pipe and carry out high annealing, and cooling naturally;
2, clean, copper tube, metallic intermediate layer pipe and the external pipe of annealing in process carried out cleaning treatment;
3, fit pierces into the intermediate layer straight carbon steel welded tube after the annealing in process in the stainless-steel thin-wall pipe external pipe, the synthetic composite pipe blank of cover;
4, expand tube, at an end of the composite pipe blank openning that to open a length be 12cm, pipe is installed on the plug of bench, put into internal mold, then the intermediate layer metal tube being carried out the drawing expand tube handles, the expand tube reducing is about 0.2mm, and metallic intermediate layer pipe and external pipe are closely combined;
5, secondary fit pierces into the copper tube that is used for inner wall tube of annealed processing and cleaning and finishes in the multiple tube that cold-drawn handles the composite pipe blank of the synthetic three-decker of cover;
6, secondary expand tube is opened one again at the openend of three-layer composite pipe base and longly is the openning of 12cm, pipe is installed on the plug of bench, puts into internal mold, carries out the drawing expand tube then and handles, and the three-layer metal pipe is closely combined;
7, the compound body peristome of finishing twice expand tube processing is taken the lead in pulling-down shaping, puts into internal mold then, puts external mold, carries out pulling-down with bench, and finishes shaping simultaneously and handle;
8, alignment, cutting, with three-layer metal multiple tube alignment on straightener of finishing after secondary expand tube and pulling-down shaping are handled, length according to the rules cuts into finished product then.
Claims (4)
1, a kind of preparation method of seamless composite metal pipe is characterized in that comprising the following steps:
(1) annealing is carried out high annealing with inner wall tube, naturally cooling;
(2) clean, the inner wall tube after external pipe and the annealing is carried out cleaning treatment;
(3) fit pierces into the synthetic composite pipe blank of cover in the external pipe with inner wall tube;
(4) expand tube at an end opening of composite pipe blank, is installed in pipe on the plug of bench, puts into internal mold, carries out the drawing expand tube then and handles;
(5) the compound body openend after the expand tube processing is taken the lead in pulling-down shaping, dwindles the caliber of tube head, puts into internal mold then, puts external mold, carries out the pulling-down shaping and handles;
(6) alignment, cutting, after alignment on the inspection machine, length according to the rules cuts into finished product with the multiple tube of finishing the breathing drawing.
2, the preparation method of seamless composite metal pipe according to claim 1, the length that it is characterized in that said compound body one end opening is 10-20cm.
3, the preparation method of seamless composite metal pipe according to claim 1 is characterized in that said inner wall tube is copper tube, carbon steel pipe, straight carbon steel welded tube, seamless metal pipe.
4, the preparation method of seamless composite metal pipe according to claim 1 is characterized in that said external pipe is stainless-steel thin-wall pipe, straight carbon steel pipe, Bao Bi TA metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011274697A CN1139445C (en) | 2001-10-22 | 2001-10-22 | Process for preparing seamless composite metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011274697A CN1139445C (en) | 2001-10-22 | 2001-10-22 | Process for preparing seamless composite metal pipe |
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| Publication Number | Publication Date |
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| CN1346718A true CN1346718A (en) | 2002-05-01 |
| CN1139445C CN1139445C (en) | 2004-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011274697A Expired - Fee Related CN1139445C (en) | 2001-10-22 | 2001-10-22 | Process for preparing seamless composite metal pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850516A (en) * | 2010-05-24 | 2010-10-06 | 建湖恒华机电有限公司 | Synchronous straightening and cutting machine of multipath linear pipe |
| CN102278541A (en) * | 2011-07-15 | 2011-12-14 | 宜昌中南精密钢管有限公司 | Bimetallic composite pipe and preparation method |
| CN103191940A (en) * | 2013-04-02 | 2013-07-10 | 中南大学 | Preparation method of heat exchanging metal composite pipe |
| CN104399773A (en) * | 2014-11-27 | 2015-03-11 | 中国海洋石油总公司 | Processing technology for high-grade steel seamless metallurgical composite pipe |
| CN107042246A (en) * | 2016-04-28 | 2017-08-15 | 西北大学 | A kind of method that utilization drawing method produces composite bimetal pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196260B (en) * | 2007-03-17 | 2011-07-20 | 桂林漓佳金属有限责任公司 | Multiunit tube of red copper-brass and production technology thereof |
-
2001
- 2001-10-22 CN CNB011274697A patent/CN1139445C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850516A (en) * | 2010-05-24 | 2010-10-06 | 建湖恒华机电有限公司 | Synchronous straightening and cutting machine of multipath linear pipe |
| CN102278541A (en) * | 2011-07-15 | 2011-12-14 | 宜昌中南精密钢管有限公司 | Bimetallic composite pipe and preparation method |
| CN103191940A (en) * | 2013-04-02 | 2013-07-10 | 中南大学 | Preparation method of heat exchanging metal composite pipe |
| CN104399773A (en) * | 2014-11-27 | 2015-03-11 | 中国海洋石油总公司 | Processing technology for high-grade steel seamless metallurgical composite pipe |
| CN107042246A (en) * | 2016-04-28 | 2017-08-15 | 西北大学 | A kind of method that utilization drawing method produces composite bimetal pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1139445C (en) | 2004-02-25 |
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