CN106216400A - The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm - Google Patents
The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm Download PDFInfo
- Publication number
- CN106216400A CN106216400A CN201610629323.6A CN201610629323A CN106216400A CN 106216400 A CN106216400 A CN 106216400A CN 201610629323 A CN201610629323 A CN 201610629323A CN 106216400 A CN106216400 A CN 106216400A
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- Prior art keywords
- rolling
- mill
- pipe
- stretch
- external diameter
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 13
- 238000009434 installation Methods 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000004513 sizing Methods 0.000 claims abstract description 10
- 238000005242 forging Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000003032 molecular docking Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000033764 rhythmic process Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000009785 tube rolling Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000005098 hot rolling Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 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
Abstract
A kind of external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm, belong to hot rolled seamless steel tube rolling technical field, feature is to use the apparatus installation system of " heating of pipe blank stove → perforating machine → stretch-reducing mill → cold → follow-up finishing of reeler → sizing mill → cold bed " and two rolling mill practice flow processs, realize using big pipe to produce small dimension hot rolled seamless steel tube, big external diameter hollow billet is rolled the external diameter needed for extending to pipe mill and corresponding length through stretch-reducing mill, owing to pipe length reduces, perforation tempo increase, follow-up supporting 2 to 3 reelers keep consistent with perforating machine rhythm, ensure this unit rhythm of production, improve unit production capacity.Efficiently solve that steel pipe head and tail wall thickness produced by stretch-reducing mill during hightension reducing and rolling is overproof simultaneously and the phenomenon such as interior six sides eliminates or reduces, reduce the loss of steel pipe crop end and improve lumber recovery, ensure that steel pipe precision simultaneously.
Description
Technical field
The invention belongs to hot rolled seamless steel tube rolling technical field, be specifically related to a kind of external diameter seamless steel pipe more than 60mm
Rolling mill practice and apparatus installation system.
Background technology
Tradition hot rolling seamless steel tube production flow process is:
Tradition hot rolling seamless steel tube production technology is by by heating of pipe blank to 1050 DEG C-1250 DEG C, then in perforation
On machine, solid pipe billet is worn into hollow hollow billet, then hollow hollow billet carries out subtracting on pipe mill wall, all
Whole extension rolls, then is determining to be rolled into by hollow forging on tube reducing the hot production tube of preliminary dimension, eventually passes
Solid pipe billet is processed into seamless steel pipe by the operations such as cold bed cooling and aligning.
In the process, there is following problem:
(1) design of tradition rolling mill practice calculates and uses inverse rolling sequence mode, i.e. according to outer diameter D c, the wall of known production tube
Thick Sc, internal diameter dc and length Lc determine the hot size of production tube, the most sequentially calculate the change of reducing mill, pipe mill and perforating machine
Shape amount, pipe size and use tool sizes and adjustment parameter, finally determine tube blank size, the deflection of each rolling-mill housing and tune
Whole parameter should just can fully ensure that in allowed band tube quality and the operation of rolling are normally carried out.When production tube parameter and unit
After parameter determination, pipe external diameter and length determine substantially, and pipe specification has certain restriction to producing, and steel pipe's production is restricted simultaneously
Supply and the fluctuation in market in pipe.
(2) stretch reducing machine there will be the phenomenon that steel pipe head, tail wall thickness are overproof in the operation of rolling, especially at big reducing rate and
In the case of hightension especially substantially, the reducing mill reducing rate more overproof segment length of big steel pipe head and tail wall thickness is the longest, causes crop, back-end crop
Length increase directly affects the lumber recovery of steel pipe.
(3) six sides in steel pipe is produced after stretch-reducing mill rolls during traditional handicraft is arranged, head and tail wall thickness deviation are big
Cannot eliminate during following process etc. defect.
Summary of the invention
It is an object of the present invention to provide a kind of external diameter that produces more than the roll seamless steel tube Processes and apparatus installation system of 60mm,
Can effectively overcome the shortcoming that prior art exists.
The present invention is achieved in that the rolling mill practice flow process that it is characterized in that described hot rolled seamless steel tube is to be existed by pipe
It is heated to 1050 DEG C to 1250 DEG C in heating furnace, then on perforating machine, the solid pipe billet after heating is worn into hollow hollow billet；
Hollow billet after perforation has two according to its follow-up process route of rolling requirements:
(1) on heating of pipe blank → perforating machine perforation → stretch-reducing mill rolling → reeler hollow billet is carried out secondary rolling prolong
Stretch and tube head tail rolled thin → sizing mill the hollow forging after expansion is carried out rolling obtain the cooling of hot production tube → cold bed → after
Continuous finishing；
(2) on heating of pipe blank → perforating machine perforation → stretch-reducing mill rolling → at heating furnace heating → reeler to hollow billet
Carry out secondary rolling to extend and tube head tail rolls thin → sizing mill and the hollow forging after expansion is carried out rolling obtain hot production tube
Cooling → follow-up the finishing of → cold bed；
Present device installation system, as it is shown in figure 1, heating of pipe blank stove 1 is arranged on rolling line foremost, heats
Furnace discharge epistome is provided with the first roller-way G1, and perforating machine 2 is installed in the first roller-way G1 corresponding section, the end of the second roller-way G2
End stretch-reducing mill 3 is installed, the rear portion of stretch-reducing mill 3 is provided with and ranked third roller-way G3 more, the 3rd roller-way G3 end with divide
Not with left and right heating furnace 5,5 ' and the corresponding docking of left and right reeler 4,4 ', left and right the 4th roller-way G4 respectively with left and right sizing mill 6,
6 ' dock mutually, are separately installed with left and right cold bed and left and right finishing machine in the follow-up flow process of left and right sizing mill 6,6 '.
Hot rolled seamless steel tube of the present invention rolling new technology and system with tradition hot rolling roll seamless steel tube technique compared with,
The invention have the advantages that
(1) hot rolled seamless steel tube of the present invention rolling new technology and system can use big pipe produce small dimension hot rolling without
Seam steel pipe, rolls the external diameter needed for extending to pipe mill and corresponding length by big external diameter hollow billet through stretch-reducing mill, due to pipe
Base length reduces, tempo increase of boring a hole, and follow-up supporting 2 to 3 reelers keep consistent with perforating machine rhythm, it is ensured that this unit is raw
Produce rhythm, improve unit production capacity, decrease the loss of equipment investment and the tool of production simultaneously.
(2) after stretch-reducing mill, arrange reeler, stretch-reducing mill during hightension reducing and rolling can be produced
Steel pipe head and tail wall thickness is overproof and the phenomenon such as interior six sides eliminates or reduces, reduce the loss of steel pipe crop end and improve lumber recovery, simultaneously
Ensure that steel pipe precision.
(3), during hot rolled seamless steel tube of the present invention rolls new technology and apparatus installation system, intermediate heating furnace mesh is set
Be that the light-wall pipe after stretch-reducing mill is carried out post bake, it is ensured that follow-up rolling temperature.
Accompanying drawing explanation
Fig. 1. present device installation system schematic diagram
In figure: 1 heating of pipe blank stove 2 perforating machine 3 stretch-reducing mill 4,4 ' left and right reelers 5,5 '
Left and right heating furnace 6,6 ' left and right sizing mills
G1, G2, G3, G4 first, second, third, fourth roller-way.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described
Produce the production tube of φ 60 × 4mm by rolling mill practice of the present invention, technological parameter is as shown in table 1, and heating furnace 1 is right
External diameter is the heating of pipe blank to 1050 DEG C of φ 120mm, and on perforating machine 2, perforation obtains the hollow billet of φ 131 × 4.8mm, at tension force
On reducing mill 3, rolling obtains the intervalve of φ 65 × 5mm, then intervalve carries out on reeler 4 secondary rolling extends and right
Tube head tail carries out rolling thin, then the hollow forging after expansion carries out on sizing mill 6 rolling obtains hot production tube, finally cools down at cold bed
With follow-up finishing.If it is relatively big to produce light-wall pipe pipe temperature drop after stretch-reducing mill 3, post bake must be carried out at heating furnace 5, add
Follow-up rolling is carried out again after heat.
Table 1 be rolling technological parameter table table of the present invention 2 be traditional processing technology parameter list
Two set techniques are all to produce φ 60 × 4mm × 12m hot rolled seamless steel tube 4mm production tube, and table 1 contrasts with table 2, this
Bright advantage is as follows:
(1) traditional handicraft 90mm bloom production, its a length of 1480mm, hot rolled seamless steel tube of the present invention rolling is new
Technique 120mm bloom production, its a length of 790mm, the drilling/rolling time to reduce than traditional handicraft, and rolling rhythm is fast, single
The rolling tool stress heated times such as root rolling top, guide plate are short, are conducive to increasing service life, cost-effective.
(2) due to the fact that the rolling rhythm of rolled by piercing mill tempo increase, particularly perforating machine and pipe mill close to or
Equal, for guaranteeing ability and the rolling load balanced Matching of each unit, improve unit productivity ratio, to give full play to the product of unit
Can, reeler can arrange 2 to 3, keeps consistent with perforating machine rhythm, it is ensured that this unit rhythm of production, improves unit production capacity.
(3) present invention arranges reeler after stretch-reducing mill, can be by stretch-reducing mill during hightension reducing and rolling
Produced steel pipe head and tail wall thickness is overproof and the phenomenon such as interior six sides eliminates or reduces, and reduces steel pipe crop end and loses raising and become a useful person
Rate.
Claims (2)
1. an external diameter roll seamless steel tube technique more than 60mm, is characterized in that there are two technological processes respectively: (1) pipe
On heating → perforating machine, perforation → stretch-reducing mill rolling → reeler carries out secondary rolling extension and enters tube head tail hollow billet
Row rolls thin → sizing mill to carry out rolling and obtains hot production tube → cold bed cooling → follow-up finishing the hollow forging after expansion；(2) pipe
On heating → perforating machine, perforation → stretch-reducing mill rolling → heating furnace heating → reeler carries out secondary rolling extension to hollow billet
Hollow forging after expansion is carried out rolling obtain hot production tube → cold bed cooling → follow-up with tube head tail being rolled thin → sizing mill
Finishing.
2. the external diameter as claimed in claim 1 roll seamless steel tube apparatus installation system more than 60mm, is characterized in that pipe adds
Hot stove (1) is arranged on rolling line foremost, and heating furnace discharging opening front portion is provided with the first roller-way (G1), perforating machine (2)
Being installed in the first roller-way (G1) corresponding section, the end of the second roller-way (G2) is provided with stretch-reducing mill (3), stretch-reducing mill
(3) rear portion is provided with and ranked third roller-way (G3) more, the 3rd roller-way (G3) end with respectively with left and right heating furnace (5,5 ') and a left side
Right reeler (4,4 ') corresponding docking, left and right the 4th roller-way (G4) docks mutually with left and right sizing mill (6,6 ') respectively, and left and right is fixed
The follow-up flow process of footpath machine (6,6 ') is separately installed with left and right cold bed and left and right finishing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629323.6A CN106216400A (en) | 2016-08-03 | 2016-08-03 | The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610629323.6A CN106216400A (en) | 2016-08-03 | 2016-08-03 | The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106216400A true CN106216400A (en) | 2016-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610629323.6A Pending CN106216400A (en) | 2016-08-03 | 2016-08-03 | The external diameter roll seamless steel tube Processes and apparatus installation system more than 60mm |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848242A (en) * | 2018-11-27 | 2019-06-07 | 上海新行不锈钢管有限公司 | A kind of nuclear power station separator seamless finned tube manufacturing process of TP439 |
| CN111014304A (en) * | 2019-12-30 | 2020-04-17 | 太原重工股份有限公司 | Steel pipe hot rolling rotary expanding production equipment and method |
| CN112404163A (en) * | 2020-11-04 | 2021-02-26 | 太原科技大学 | Preparation method of high-performance difficult-deformation metal precision seamless pipe |
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| JPS58313A (en) * | 1981-06-24 | 1983-01-05 | Kawasaki Steel Corp | Controlling device for seamless pipe rolling mill |
| JPH0747409A (en) * | 1993-08-06 | 1995-02-21 | Sumitomo Metal Ind Ltd | Method and device for rolling by mandrel mill |
| CN101658864A (en) * | 2009-09-15 | 2010-03-03 | 太原通泽重工有限公司 | Novel process for manufacturing thick-wall seamless steel tube |
| CN101905243A (en) * | 2010-07-19 | 2010-12-08 | 太原通泽重工有限公司 | Seamless steel tube reducing process |
| CN102228905A (en) * | 2011-04-03 | 2011-11-02 | 胡顺珍 | Production process of hot continuous rolling seamless steel tube with small caliber |
| CN102284486A (en) * | 2011-08-24 | 2011-12-21 | 无锡华冶钢铁有限公司 | Process for manufacturing seamless steel tubes by hot rolling |
| CN104874616A (en) * | 2014-02-28 | 2015-09-02 | 中南大学 | Wall thickness precision control method of hot rolled seamless steel pipes and roll pass |
| CN105234178A (en) * | 2015-11-18 | 2016-01-13 | 扬州诚德钢管有限公司 | Flexible process route for producing large-caliber seamless steel tube |
-
2016
- 2016-08-03 CN CN201610629323.6A patent/CN106216400A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58313A (en) * | 1981-06-24 | 1983-01-05 | Kawasaki Steel Corp | Controlling device for seamless pipe rolling mill |
| JPH0747409A (en) * | 1993-08-06 | 1995-02-21 | Sumitomo Metal Ind Ltd | Method and device for rolling by mandrel mill |
| CN101658864A (en) * | 2009-09-15 | 2010-03-03 | 太原通泽重工有限公司 | Novel process for manufacturing thick-wall seamless steel tube |
| CN101905243A (en) * | 2010-07-19 | 2010-12-08 | 太原通泽重工有限公司 | Seamless steel tube reducing process |
| CN102228905A (en) * | 2011-04-03 | 2011-11-02 | 胡顺珍 | Production process of hot continuous rolling seamless steel tube with small caliber |
| CN102284486A (en) * | 2011-08-24 | 2011-12-21 | 无锡华冶钢铁有限公司 | Process for manufacturing seamless steel tubes by hot rolling |
| CN104874616A (en) * | 2014-02-28 | 2015-09-02 | 中南大学 | Wall thickness precision control method of hot rolled seamless steel pipes and roll pass |
| CN105234178A (en) * | 2015-11-18 | 2016-01-13 | 扬州诚德钢管有限公司 | Flexible process route for producing large-caliber seamless steel tube |
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| 唐华平等: "无缝钢管张力减径过程壁厚不均匀模拟研究", 《现代制造工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848242A (en) * | 2018-11-27 | 2019-06-07 | 上海新行不锈钢管有限公司 | A kind of nuclear power station separator seamless finned tube manufacturing process of TP439 |
| CN111014304A (en) * | 2019-12-30 | 2020-04-17 | 太原重工股份有限公司 | Steel pipe hot rolling rotary expanding production equipment and method |
| CN112404163A (en) * | 2020-11-04 | 2021-02-26 | 太原科技大学 | Preparation method of high-performance difficult-deformation metal precision seamless pipe |
| CN112404163B (en) * | 2020-11-04 | 2023-02-28 | 太原科技大学 | Preparation method of high-performance difficult-deformation metal precision seamless pipe |
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Application publication date: 20161214 |
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