CN101555963A - Method for manufacturing thin-wall composite metal pipe - Google Patents
Method for manufacturing thin-wall composite metal pipe Download PDFInfo
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- CN101555963A CN101555963A CNA2009100266748A CN200910026674A CN101555963A CN 101555963 A CN101555963 A CN 101555963A CN A2009100266748 A CNA2009100266748 A CN A2009100266748A CN 200910026674 A CN200910026674 A CN 200910026674A CN 101555963 A CN101555963 A CN 101555963A
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- pipe
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- outer pipe
- metal pipe
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000010273 cold forging Methods 0.000 claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 238000000137 annealing Methods 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims description 13
- 238000004381 surface treatment Methods 0.000 claims description 6
- 230000001603 reducing effect Effects 0.000 claims description 3
- 238000010923 batch production Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- Extrusion Of Metal (AREA)
Abstract
The invention provides a method for manufacturing a thin-wall composite metal pipe, relates to a method for manufacturing a metal pipe, and particularly relates to a method for manufacturing a thin-wall composite metal pipe by using a metal plastic forming technology. The process comprises the following steps: 1. sawing materials, 2, softening materials and processing surfaces, 3, performing deep hole extrusion preforming on blanks by adopting a cold forging and reverse extrusion method, 4, annealing at low temperature, 5, processing surfaces, 6, respectively manufacturing an inner pipe and an outer pipe by adopting a cold forging and extrusion method to perform multiple times of reduction and drawing, 7, sleeving the inner pipe and the outer pipe together, and performing composite reduction and drawing forming on the inner pipe and the outer pipe by adopting the cold forging and extrusion method to finally obtain products meeting the requirements of tissue performance and size precision. The invention has the beneficial effects that: the pipes are gapless, the combination is tight, and the uniformity is good; the processing method is easy to implement, can meet the requirement of batch production, and has compact internal structure and stable quality of products.
Description
Affiliated technical field
The present invention relates to a kind of production method of metal pipe, especially a kind of method of utilizing the metal forming technology to prepare thin-walled composite metal pipe.
Background technique
Composite metal pipe has become a kind of product of widespread usage in production and the life at present, be characterized in being made up of the metal tube of two-layer or more multi-layered unlike material, and the wall of every layer of pipe is all very thin, can not be gapped between the tube wall.Manufacture method at composite metal pipe is carried out patent retrieval, the technology that we find and the invention is the most approaching has ZL01127469.7, ZL00127291.8 and ZL00113051.X, above-mentioned patent all discloses and a kind ofly has been nested together with two metal tubes of jacketing machine with unlike material, and with the extruding drawing equipment that it is compound, carry out the method for the processing composite metal pipe of alignment and end face finishing at last.Its advantage of such manufacture method is: can be used for processing the very big long composite pipe of slenderness ratio; Its defective is: will be one by one assembling difficulty when single tube is assembled into composite pipe, and be processed into behind the composite pipe and unavoidablely between the tube and tube have an inhomogeneous gap.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, a kind of 1 meter of processing pipe range less than that is applicable to is provided, do not have the gap between the tube and tube, in conjunction with tight, the manufacture method of the thin-walled composite metal pipe of good evenness, can satisfy batch production requirements at this manufacture method easy processing.
Technical solution of the present invention is: a kind of manufacture method of thin-walled composite metal pipe, its process step comprises: 1, saw material, 2, material softening and surface treatment, 3, the method that adopts cold forging instead to squeeze is carried out the preforming that deep hole pushes to blank, 4, stress relieving, 5, surface treatment, 6, adopt the method for cold forging extruding to carry out repeatedly the attenuate pull and stretch and make inner and outer pipe respectively, 7, inner and outer pipe is sleeved on together, the method that adopts the cold forging extruding finally is met the product of structure property, dimension precision requirement with the compound attenuate drawing and forming of inner and outer pipe.
Described saw material refers to blanking inner and outer pipe blank, and the inner and outer pipe blank is controlled at 1.01～1.02 times of inner and outer pipe weight in the finished product respectively.
Described conventional material is softening to be meant: spheroidizing annealing, improve material plasticity, for follow-up anti-bank run supplies suitable compression stiffness.
Described conventional surface treatment is meant ball blast and phospholeumization, and mainly being provides lubricating film for follow-up attenuate drawing sequence.
Described preforming, the amount of deformation of operation be according to the difference of material, is controlled in the material permission range to get final product.
Described attenuate pull and stretch is meant diameter reducing extrusion, and amount of deformation is controlled in the material permission range according to the difference of material; Process inner and outer pipe respectively through the method for attenuate pull and stretch repeatedly, wherein in pipe be deformed in the finished product in the size of pipe, the blank dimension when the outer tube deformation requirements requires to accomplish compound attenuate pull and stretch according to postchannel process when satisfying the material permission range.
Described compound attenuate pull and stretch is meant: inner and outer pipe is sleeved on together, adopts the method for cold forging extruding, the diameter of interior pipe, length are constant substantially, outer tube reduced outside diameter, increase length, and its amount of deformation is controlled in the material permission range according to the difference of material.
The invention has the beneficial effects as follows: by anti-extrusion forming method, make the preforming of inner and outer pipe, will be squeezed into finished product after the inner and outer pipes assembling then, because in compound attenuate drawing process, workpiece is subjected to very big radial pressure, so outer tube can tightly be fitted the elimination original interstice with interior pipe; This kind processing method is easily implemented, and can satisfy batch production requirements, the product dense internal organization, and steady quality, thus satisfied gapless requirement between compound thin-walled.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 is the process flow sketch of preparation inner and outer pipe among the present invention.
Fig. 3 is the compound process flow sketch of inner and outer pipe among the present invention.
Embodiment
With the two-layer compound steel pipe is example, and the material trademark outer tube is the 20# steel, and interior pipe is the 10# steel, and its manufacturing technology steps is:
1, selecting the outer tube material trade mark is the 20# steel, and diameter is the hot rolling round bar of 104.7 millimeters of φ, and the inner tube material trade mark is the 10# steel, and diameter is the hot rolling round bar of 95.2 millimeters of φ.Saw material length is controlled at 47～50 millimeters.
2, blank is carried out conventional spheroidizing annealing operation and conventional ball blast, phospholeum chemical industry preface.
3, the method that adopts cold forging instead to squeeze is finished the preforming that deep hole pushes, and outer tube is by 104.7 millimeters counter 80.5 millimeters of 105 millimeters of external diameter φ, endoporus φ, 76 millimeters of hole depths of being extruded onto of blank diameter φ, and amount of deformation is 55%.Interior pipe is by 95.2 millimeters counter 70 millimeters of 95.6 millimeters of external diameter φ, endoporus φ, 71 millimeters of hole depths of being extruded onto of blank diameter φ, and amount of deformation is 53%.
4, conventional low temperature spheroidizing annealing operation, blank put into annealing furnace after, be heated to 720 ℃ ± 20 ℃, be incubated 6 hours, be cooled to 500 ℃ with stove, from stove, take out the back air cooling to room temperature.
5, ball blast, phospholeum chemical industry preface.
6, attenuate pull and stretch I operation, the method that adopts cold forging to push, outer tube is squeezed into 80.5 millimeters of 100.5 millimeters of external diameter φ, endoporus φ, 95 millimeters of hole depths for 76 millimeters by 80.5 millimeters of 105 millimeters of external diameter φ, endoporus φ, hole depth, and amount of deformation is 31%; Interior pipe is squeezed into 70 millimeters of 88 millimeters of external diameter φ, endoporus φ, 106 millimeters of hole depths for 71 millimeters by 70 millimeters of 95.6 millimeters of external diameter φ, endoporus φ, hole depth, and amount of deformation is 58%.Attenuate pull and stretch II operation, the method that adopts cold forging to push, outer tube is squeezed into 80.5 millimeters of 97.3 millimeters of external diameter φ, endoporus φ, 115 millimeters of hole depths for 95 millimeters by 80.5 millimeters of 100.5 millimeters of external diameter φ, endoporus φ, hole depth, and amount of deformation is 31%; Interior pipe is squeezed into 70 millimeters of 80 millimeters of external diameter φ, endoporus φ, 200 millimeters of hole depths for 106 millimeters by 70 millimeters of 88 millimeters of external diameter φ, endoporus φ, hole depth, and amount of deformation is 47%.
7, compound attenuate drawing sequence is gone into outer tube with interior pipe box, adopts the method for cold forging extruding, and compound light wall pipe is become 70 millimeters of 90 millimeters of external diameter φ, endoporus φ, 200 millimeters of hole depths by 70 millimeters of 97.3 millimeters of external diameter φ, endoporus φ, 200 millimeters tube reducings of hole depth.
8, require the cutting end face according to finished size.
Claims (6)
1, a kind of manufacture method of thin-walled composite metal pipe, it is characterized in that: its process step comprises (1) saw material, (2) material softening and surface treatment, (3) method that adopts cold forging instead to squeeze is carried out the preforming that deep hole pushes to blank, (4) stress relieving, (5) surface treatment, (6) adopt the method for cold forging extruding to carry out repeatedly the attenuate pull and stretch and make inner and outer pipe respectively, (7) inner and outer pipe is sleeved on together, the method that adopts the cold forging extruding finally is met the product of structure property, dimension precision requirement with the compound attenuate drawing and forming of inner and outer pipe.
2, according to the manufacture method of the described a kind of thin-walled composite metal pipe of claim 1, it is characterized in that: described saw material refers to blanking inner and outer pipe blank, and the inner and outer pipe blank is controlled at 1.01～1.02 times of inner and outer pipe weight in the finished product respectively.
3, according to the manufacture method of the described a kind of thin-walled composite metal pipe of claim 1, it is characterized in that: the softening spheroidizing annealing that is meant of described conventional material.
4, according to the manufacture method of the described a kind of thin-walled composite metal pipe of claim 1, it is characterized in that: described conventional surface treatment is meant ball blast and phospholeumization.
5, according to the manufacture method of the described a kind of thin-walled composite metal pipe of claim 1, it is characterized in that: described attenuate pull and stretch is meant diameter reducing extrusion, and amount of deformation is controlled in the material permission range according to the difference of material; Process inner and outer pipe respectively through the method for attenuate pull and stretch repeatedly, wherein in pipe be deformed in the finished product in the size of pipe, the blank dimension when the outer tube deformation requirements requires to accomplish compound attenuate pull and stretch according to postchannel process when satisfying the material permission range.
6, according to the manufacture method of the described a kind of thin-walled composite metal pipe of claim 1, it is characterized in that: described compound attenuate pull and stretch is meant inner and outer pipe is sleeved on together, adopt the method for cold forging extruding, diameter, the length of interior pipe remain unchanged, outer tube reduced outside diameter, increase length, its amount of deformation is controlled in the material permission range according to the difference of material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100266748A CN101555963A (en) | 2009-05-08 | 2009-05-08 | Method for manufacturing thin-wall composite metal pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100266748A CN101555963A (en) | 2009-05-08 | 2009-05-08 | Method for manufacturing thin-wall composite metal pipe |
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| CN101555963A true CN101555963A (en) | 2009-10-14 |
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| CNA2009100266748A Pending CN101555963A (en) | 2009-05-08 | 2009-05-08 | Method for manufacturing thin-wall composite metal pipe |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772612A (en) * | 2016-05-13 | 2016-07-20 | 北京科技大学 | Preparation method for gold-cladding copper composite wire |
| CN107414416A (en) * | 2017-06-14 | 2017-12-01 | 江苏森威精锻有限公司 | A kind of forging method of precision deep bore light-wall pipe |
| CN110202019A (en) * | 2019-07-03 | 2019-09-06 | 安徽澳德矿山机械设备科技股份有限公司 | A kind of preparation method of bimetallic pipe billet and its prepare mold |
| CN113319597A (en) * | 2021-06-18 | 2021-08-31 | 苏州天裕塑胶有限公司 | Production equipment and production process of continuous seamless elastic coiled core pipe |
| CN113714452A (en) * | 2021-07-27 | 2021-11-30 | 王生林 | Intermittent support type composite pipe end positioning and rotary forging equipment |
| CN115319412A (en) * | 2022-08-08 | 2022-11-11 | 四川航天中天动力装备有限责任公司 | Processing method of shell with variable wall thickness |
-
2009
- 2009-05-08 CN CNA2009100266748A patent/CN101555963A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772612A (en) * | 2016-05-13 | 2016-07-20 | 北京科技大学 | Preparation method for gold-cladding copper composite wire |
| CN107414416A (en) * | 2017-06-14 | 2017-12-01 | 江苏森威精锻有限公司 | A kind of forging method of precision deep bore light-wall pipe |
| CN107414416B (en) * | 2017-06-14 | 2020-02-11 | 江苏森威精锻有限公司 | Forging method of precise deep-hole thin-walled tube |
| CN110202019A (en) * | 2019-07-03 | 2019-09-06 | 安徽澳德矿山机械设备科技股份有限公司 | A kind of preparation method of bimetallic pipe billet and its prepare mold |
| CN113319597A (en) * | 2021-06-18 | 2021-08-31 | 苏州天裕塑胶有限公司 | Production equipment and production process of continuous seamless elastic coiled core pipe |
| CN113714452A (en) * | 2021-07-27 | 2021-11-30 | 王生林 | Intermittent support type composite pipe end positioning and rotary forging equipment |
| CN113714452B (en) * | 2021-07-27 | 2023-05-09 | 临沂市华创新型建材有限公司 | Intermittent support type composite pipe end positioning and rotary forging equipment |
| CN115319412A (en) * | 2022-08-08 | 2022-11-11 | 四川航天中天动力装备有限责任公司 | Processing method of shell with variable wall thickness |
| CN115319412B (en) * | 2022-08-08 | 2023-06-06 | 四川航天中天动力装备有限责任公司 | Wall thickness variable shell processing technique |
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Application publication date: 20091014 |