CN108160710A - A kind of seamless pipe manufacturing method of hexagon - Google Patents
A kind of seamless pipe manufacturing method of hexagon Download PDFInfo
- Publication number
- CN108160710A CN108160710A CN201711372413.2A CN201711372413A CN108160710A CN 108160710 A CN108160710 A CN 108160710A CN 201711372413 A CN201711372413 A CN 201711372413A CN 108160710 A CN108160710 A CN 108160710A
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- CN
- China
- Prior art keywords
- cold rolling
- seamless pipe
- pipe manufacturing
- hexagon
- processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005097 cold rolling Methods 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 8
- 239000010935 stainless steel Substances 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 6
- 238000007493 shaping process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Steel (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
A kind of seamless pipe manufacturing method method of hexagon, including step in detail below：Step 1, cold rolling processing carry out cold rolling at least twice to complete the making of intermediate pipe to blank；Step 2, heat treatment, keeps the temperature after the intermediate pipe is heated；Step 3 is molded cold rolling, and it is hexagonal formed pipe that the cold-rolling process closed using multiple processing roller groups, which rolls into the outer profile of radial section and internal bore profile,.The present invention can successfully produce that dimensional accuracy is high, surface quality is good, performance stable homogeneous stainless steel and alloy hexagon seamless pipe.
Description
Technical field
The present invention relates to hexagon seamless pipe production technical fields, and in particular to a kind of seamless pipe manufacturing method of hexagon.
Background technology
Six angle pipes are applied because of its special cylinder structure in certain fields.Traditional stainless steel and alloy hexagon
In seamless pipe generally use circular pipe blank prepared by the mode of appearance machining or cold drawn forming, and such method can not be equal to pipe performance
One property, dimensional homogeneity, surface quality homogeneity accomplish to make overall plans.
Invention content
The object of the present invention is to provide a kind of seamless pipe manufacturing methods of hexagon, and the present invention overcomes the processing of special-shaped seamless tubing to make
The shortcomings that making in technology provides a kind of stainless steel that can guarantee that dimensional tolerance, performance uniformity, surface quality are high and alloy hexagonal
Shape seamless pipe cold rolling moulding process.
The present invention above-mentioned technical purpose technical scheme is that：A kind of hexagon seamless pipe manufacture
Method, including step in detail below：
Step 1, cold rolling processing carry out cold rolling at least twice to complete the making of intermediate pipe to blank；
Step 2, heat treatment, keeps the temperature after the intermediate pipe is heated；
Step 3 is molded cold rolling, and the cold-rolling process closed using multiple processing roller groups rolls into the outer profile of radial section and endoporus wheel
Exterior feature is hexagonal formed pipe.
As a preference of the present invention, the dog-ear for processing the formed pipe is provided on the processing roller in step 3
Bending roller portion, include two intersecting processing planes in the bending roller portion, two processing planes are connected by fillet
Transition.
As a preference of the present invention, the radius of corner is controlled in R0.9 ~ R21.0mm.
As a preference of the present invention, the solid solution condition of heat treatment process is protective atmosphere brightness heat treatment in the step 2
Or air atmosphere heat treatment.
As a preference of the present invention, 1050 ~ 1200 DEG C of heat-treatment temperature range is controlled in the heat treatment process.
As a preference of the present invention, needing to carry out blank multiple cold rolling in the step one, sent in the cold-rolling process
Input is 1 ~ 3.4mm, and mill speed is 10 ~ 100n/min.
As a preference of the present invention, setting plastic sheath, mandrel stem junction on the outside of cold rolling mandrel stem all in cold rolling
Carry out rounding off processing.
As a preference of the present invention, the deformation quantity of the blank is increased to by 15% cold rolling in the molding cold rolling
50%。
As a preference of the present invention, the processing roller described in three is encircled into processing channel, institute on same vertical plane
The sectional area for stating processing channel is gradually reduced along conveying direction.
As a preference of the present invention, controlled rolling speed≤90 beat/min in the step three, feed is≤6mm.
In conclusion the present invention has the advantages that：
The present invention can successfully produce that dimensional accuracy is high, surface quality is good, performance stable homogeneous stainless steel and alloy hexagonal
Shape seamless pipe.
Description of the drawings
Fig. 1 is processing roll structure schematic diagram；
In figure, 1- processing roller, 2- bendings roller portion, 2-1- processing plane, 2-2- fillets.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing.
The embodiment of the present invention includes step in detail below：
Step 1, cold rolling processing carry out cold rolling at least twice to complete the making of intermediate pipe, this step to the blank of C276 alloys
It needs to carry out blank multiple cold rolling in rapid, feed is 1 ~ 3.4mm in cold-rolling process, and mill speed is 10 ~ 100n/min.Multiple roll
Mill milling is conducive to the control of tubing inside and outside surface quality, especially interior table quality control, and conducive to size of pipe and tubing precision control
System.It is found by experiment that, when deflection is from during 15% increases to 50%, the yield strength of blank is gradually incremented by from 900MPa
To 1250MPa, and increment is more uniform.According to multi-roll mill, cold rolling reduction range 15% ~ 50%, lengthening coefficient can be set
Range 1.1 ~ 2.0 to obtain yield strength value required in 900 ~ 1250MPa sections, that is, controls the Gao Gang of C276 alloy pipes
Level characteristics.Therefore the deformation quantity of blank is increased to 50% by 15% gradual cold rolling in molding cold rolling of the embodiment of the present invention, cold-rolling process
In setting plastic sheath on the outside of all cold rolling mandrel stem, mandrel stem junction carries out rounding off processing, begins in cold-rolled process
The surfaces externally and internally lubrication for keeping pipeline eventually is abundant；
Step 2, heat treatment are kept the temperature after intermediate pipe is heated, and the solid solution condition of heat treatment process is protection in this step
Atmosphere brightness heat treatment or air atmosphere heat treatment.1050 ~ 1200 DEG C of heat-treatment temperature range is controlled in heat treatment process, is protected
The warm time depending on intermediate product, trimmed size, controls 4 ~ 9 grades of the grain size of intermediate pipe, and further control is in 6 in grain size
~ 7 grades, high-yield-ratio character control range 0.85 ~ 0.95, the yield strength that can cause intermediate pipe in this way is more than 1050MPa,
The flatness of the planar portions of the outer surface of formed pipe is better when machine-shaping pipe in this way, can be so that surfaces externally and internally is thick
Rugosity≤1.6 μm；
Step 3 is molded cold rolling, and the cold-rolling process combined using multiple processing rollers 1 rolls into the outer profile of radial section and endoporus wheel
Exterior feature is hexagonal formed pipe, controlled rolling speed≤90 beat/min is needed in this step, feed is≤6mm, due to this implementation
The hexagon seamless pipe of example manufacture, hexagonal outer profile need stress is visibly homogeneous could process, are rolled if do not controlled
Speed and feed processed can then lead in cold-rolled process that the speed of front end is different from the process velocity of rear end so that front end is to rear
The problem of end produces squeezing action, easily generates surface folding, and straightness declines, by the way that rolling speed is determined after repeatedly calculating
≤ 90 beats/min of degree, feed are ± 0.20mm to roll into opposite side distance deviation in hexagon seamless pipe after≤6mm, and wall thickness deviation is
± 0.10mm, crest line straightness≤1.0mm/m, surfaces externally and internally roughness≤1.6 μm.
As shown in Figure 1, it is provided on processing roller 1 in the step of embodiment of the present invention three for the dog-ear of machine-shaping pipe
Bending roller portion 2, bend and include intersecting two processing planes 2-1 in roller portion 2, two processing plane 2-1 are connected by fillet 2-2
It takes over and crosses, three processing rollers 1 of first use of the embodiment of the present invention are processed in the plane of same radial direction, are added for single
For work roller 1, the fillet 2-2 settings of bending roller portion 2 can guarantee that the dog-ear of formed pipe keeps certain arc after machine-shaping
Spend the shock resistance so as to promote formed pipe.The control of fillet 2-2 radiuses in R0.9 ~ R21.0mm, further control R1.0 ~
R20.0mm if radius is more than R20.0mm and the dog-ear of formed pipe can be caused too round and smooth, damages specification and appearance；And it is less than
R1.0 can cause the fillet 2-2 of transition too small, approach dog-ear, and the middle circle processed in step 1 due to the present invention
The yield strength of pipe in more than 1050MPa, be both intermediate pipe deformability it is limited, this allows for intermediate pipe in cold rolling
The working ability at dog-ear dies down so that the tube wall of pipe is difficult to be bonded to form big radian fillet among at dog-ear in the process
2-2, so as to cause the appearance of substandard products.Setting plastic sheath on the outside of the cold rolling mandrel stem of roller 1 is processed, mandrel stem junction is justified
Transition processing is slided, remains that the surfaces externally and internally lubrication of pipeline is abundant in cold-rolled process.Three processing rollers 1 are same vertical flat
Processing channel is encircled on face, the sectional area of processing channel is gradually reduced along conveying direction.
After multi-pass " cold working-heat treatment ", the stainless steel of 114 × 10mm of Φ squeezes circular pipe blank and adds the embodiment of the present invention
Pipe is finally rolled to six angle pipes, mill speed 20 ~ 50 by work to the pipe intermediate tube of 70 × 1.4mm of Φ using combination roller mode
Beat/min, 1 ~ 3mm of feed, 60 ° of angle of revolution.
Carrying out size sight check, wall thickness satisfaction ± 0.1mm deviation requirements to the production tube after rolling, interior opposite side distance meets ±
0.2mm deviation requirements, crest line straightness satisfaction≤1.0mm/m requirements, inside and outside fillet 2-2 radiuses satisfaction ± 0.5mm deviation requirements,
Surfaces externally and internally roughness is satisfied by≤1.6 μm of requirements.And the stainless steel six angle pipes surfaces externally and internally is visible by naked eyes oxide skin, clast
Sundries and crackle, scuffing, folding, absciss layer, the defects of scabbing are waited, and is more than the impression of 0.15mm depths without depth.The present invention is implemented
The blank used in example finally produces the hexagon seamless pipe of C276 alloys for C276 alloys.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of no creative contribution after this specification is read, but as long as at this
It is all protected in the right of invention by Patent Law.
Claims (10)
1. a kind of seamless pipe manufacturing method of hexagon, which is characterized in that including step in detail below：
Step 1, cold rolling processing carry out cold rolling at least twice to complete the making of intermediate pipe to blank；
Step 2, heat treatment will be kept the temperature after the intermediate pipe heating；
Step 3 is molded cold rolling, using multiple processing rollers（1）The cold-rolling process of combination rolls into the outer profile and endoporus of radial section
Profile is hexagonal formed pipe.
2. a kind of seamless pipe manufacturing method of hexagon according to claim 1, it is characterised in that：Described in step 3 plus
Work roller（1）On be provided with for process the formed pipe dog-ear bending roller portion（2）, the bending roller portion（2）It is upper to include phase
The two processing planes handed over（2-1）, two processing planes（2-1）Pass through fillet（2-2）Connect transition.
3. a kind of seamless pipe manufacturing method of hexagon according to claim 2, it is characterised in that：The fillet（2-2）
Radius is controlled in R0.9 ~ R21.0mm.
4. a kind of seamless pipe manufacturing method of hexagon according to claim 1, it is characterised in that：In the step 2 at heat
The solid solution condition of science and engineering skill is heat-treated for protective atmosphere brightness heat treatment or air atmosphere.
5. a kind of seamless pipe manufacturing method of hexagon according to claim 1 or 4, it is characterised in that：The heat treatment
1050 ~ 1200 DEG C of heat-treatment temperature range is controlled in technique.
6. a kind of seamless pipe manufacturing method of hexagon according to claim 1, it is characterised in that：It is needed in the step one
Multiple cold rolling is carried out to blank, feed is 1 ~ 3.4mm in the cold-rolling process, and mill speed is 10 ~ 100n/min.
7. a kind of seamless pipe manufacturing method of hexagon according to claim 2 or 6, it is characterised in that：It is all in cold rolling
Setting plastic sheath on the outside of cold rolling mandrel stem, mandrel stem junction carry out rounding off processing.
8. a kind of seamless pipe manufacturing method of hexagon according to claim 6, it is characterised in that：In the molding cold rolling
The deformation quantity of the blank is increased to 50% by 15% cold rolling.
9. a kind of seamless pipe manufacturing method of hexagon according to claim 2, it is characterised in that：Processing roller described in three
（1）Processing channel is encircled on same vertical plane, the sectional area of the processing channel is gradually reduced along conveying direction.
10. a kind of seamless pipe manufacturing method of hexagon according to claim 1, it is characterised in that：In the step three
Controlled rolling speed≤90 beat/min, feed are≤6mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017101826370 | 2017-03-24 | ||
| CN201710182637.0A CN106881355A (en) | 2017-03-24 | 2017-03-24 | A kind of seamless pipe manufacturing method of hexagon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108160710A true CN108160710A (en) | 2018-06-15 |
Family
ID=59182130
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710182637.0A Withdrawn CN106881355A (en) | 2017-03-24 | 2017-03-24 | A kind of seamless pipe manufacturing method of hexagon |
| CN201711372413.2A Pending CN108160710A (en) | 2017-03-24 | 2017-12-19 | A kind of seamless pipe manufacturing method of hexagon |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710182637.0A Withdrawn CN106881355A (en) | 2017-03-24 | 2017-03-24 | A kind of seamless pipe manufacturing method of hexagon |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106881355A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109622904A (en) * | 2019-02-01 | 2019-04-16 | 东北大学 | A kind of device and method for realizing continuous cast round billets process of setting core soft reduction process |
| CN112496065A (en) * | 2020-11-14 | 2021-03-16 | 湖南文理学院 | Extrusion conveying device for manufacturing special pipe |
| CN112692065A (en) * | 2020-12-08 | 2021-04-23 | 江苏银环精密钢管有限公司 | High-strength thin-wall stainless steel hexagonal seamless tube and manufacturing method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109692885B (en) * | 2019-02-22 | 2019-12-03 | 山东鹏瑞凿岩科技有限公司 | The production technology of trigone steel pipe |
| CN113458176B (en) * | 2021-06-30 | 2023-06-27 | 浙江久立特材科技股份有限公司 | Manufacturing method of high-precision seamless tube with outer hexagonal and inner circular special-shaped cross section for nuclear power |
| WO2023272609A1 (en) * | 2021-06-30 | 2023-01-05 | 浙江久立特材科技股份有限公司 | High-precision seamless pipe having special-shaped hexagonal cross-section with circle inside for use in nuclear power and manufacturing method therefor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2115844U (en) * | 1991-04-22 | 1992-09-16 | 湖北咸宁矿山机械厂 | Mill for primary profiled empty hexagon drill steel |
| SU1820537A1 (en) * | 1990-08-20 | 1996-06-10 | Всесоюзный научно-исследовательский институт неорганических материалов им. акад. А.А.Бочвара | Method of cold rolling of polyhedral tubes |
| CN1411921A (en) * | 2002-09-23 | 2003-04-23 | 北京科技大学 | Hot-rolling perforation-cold-rolling forming method for hollow rock-drill steel |
| CN1695839A (en) * | 2004-08-17 | 2005-11-16 | 江苏包罗铜材集团股份有限公司 | Roller trio skew rolling method for cold perforating and cold chambering ingot |
| CN101797585A (en) * | 2010-03-15 | 2010-08-11 | 江苏包罗铜材集团股份有限公司 | Two-roller skew-rolling cold piercing and cold broaching machine for metal ingot |
| CN105728464A (en) * | 2016-04-09 | 2016-07-06 | 刘敢 | Formation rolling process of hexagonal hollow steel for drill tools |
-
2017
- 2017-03-24 CN CN201710182637.0A patent/CN106881355A/en not_active Withdrawn
- 2017-12-19 CN CN201711372413.2A patent/CN108160710A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1820537A1 (en) * | 1990-08-20 | 1996-06-10 | Всесоюзный научно-исследовательский институт неорганических материалов им. акад. А.А.Бочвара | Method of cold rolling of polyhedral tubes |
| CN2115844U (en) * | 1991-04-22 | 1992-09-16 | 湖北咸宁矿山机械厂 | Mill for primary profiled empty hexagon drill steel |
| CN1411921A (en) * | 2002-09-23 | 2003-04-23 | 北京科技大学 | Hot-rolling perforation-cold-rolling forming method for hollow rock-drill steel |
| CN1695839A (en) * | 2004-08-17 | 2005-11-16 | 江苏包罗铜材集团股份有限公司 | Roller trio skew rolling method for cold perforating and cold chambering ingot |
| CN101797585A (en) * | 2010-03-15 | 2010-08-11 | 江苏包罗铜材集团股份有限公司 | Two-roller skew-rolling cold piercing and cold broaching machine for metal ingot |
| CN105728464A (en) * | 2016-04-09 | 2016-07-06 | 刘敢 | Formation rolling process of hexagonal hollow steel for drill tools |
Non-Patent Citations (1)
| Title |
|---|
| 李连诗: "冷轧管机生产特殊异型管的方法", 《钢管》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109622904A (en) * | 2019-02-01 | 2019-04-16 | 东北大学 | A kind of device and method for realizing continuous cast round billets process of setting core soft reduction process |
| CN112496065A (en) * | 2020-11-14 | 2021-03-16 | 湖南文理学院 | Extrusion conveying device for manufacturing special pipe |
| CN112692065A (en) * | 2020-12-08 | 2021-04-23 | 江苏银环精密钢管有限公司 | High-strength thin-wall stainless steel hexagonal seamless tube and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106881355A (en) | 2017-06-23 |
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