CN105080970B - A kind of seamless steel pipe oblique milling equipment and technique - Google Patents
A kind of seamless steel pipe oblique milling equipment and technique Download PDFInfo
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- CN105080970B CN105080970B CN201510545734.2A CN201510545734A CN105080970B CN 105080970 B CN105080970 B CN 105080970B CN 201510545734 A CN201510545734 A CN 201510545734A CN 105080970 B CN105080970 B CN 105080970B
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- rolling mill
- skew rolling
- oblique milling
- steel pipe
- seamless steel
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Abstract
The invention discloses a kind of seamless steel pipe oblique milling equipment, including a skew rolling mill and secondary skew rolling mill, skew rolling mill and secondary skew rolling mill share same interior warp tool, and the distance between a skew rolling mill and secondary skew rolling mill are more than or equal to the length of steel pipe after an oblique milling.Present invention simultaneously provides a kind of seamless steel pipe oblique roll process：By heating of pipe blank stove by heating of pipe blank to piercing temperature；Pipe is on punch by pierced billet into hollow billet；Hollow billet is rolled using a skew rolling mill；Hollow forging and interior warp tool after oblique milling send into secondary skew rolling mill together, and secondary oblique milling shares same interior warp tool with an oblique milling；Fixed/tube reducing is carried out to the hollow forging rolled by fixed/reducing mill, production tube is rolled into, into subsequent handlings such as cold bed, segmentation saw, finishing.The present invention compared with prior art, can expand the range of product size of oblique milling unit production, and realize that multiple length is produced, and improve productivity ratio.
Description
Technical field
The invention belongs to roll seamless steel tube technical field, and in particular to a kind of seamless steel pipe oblique milling equipment and technique.
Background technology
In hot rolled seamless steel tube production, oblique milling unit is a kind of important production method.Its technological process is：Pipe
Base --- heating stove heat --- fixed (subtracting) footpath of fixed (subtracting) footpath machine of punch perforation --- diagonal rolling pipe mill tube rolling ---.But, it is existing
Some diagonal rolling pipe mill groups easily produce the defects, product surface quality such as spiral channel (especially inside spin road) when producing light-wall pipe
Poor, when producing light-wall pipe, wall thickness accuracy is poor, limits the range of product size of oblique milling unit production, and can only carry out single times
Chi is produced, low production efficiency, so as to influence the market competitiveness of oblique milling unit.
The content of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of seamless steel pipe oblique milling equipment,
The light-wall pipe that surface quality is good, wall thickness accuracy is high can be rolled out, expands the range of product size of oblique milling unit production, and realize again
Chi is produced, and improves productivity ratio.
In order to achieve the above objects and other related objects, technical scheme is as follows：
A kind of seamless steel pipe oblique milling equipment, including the skew rolling mill set gradually along rolling direction and secondary oblique milling
Elongator, a skew rolling mill and secondary skew rolling mill share same interior warp tool, a skew rolling mill
It is more than or equal to the length of steel pipe after an oblique milling with the distance between secondary skew rolling mill.
As preferred：The roller shape of skew rolling mill and secondary skew rolling mill is oblique milling roller.
As preferred：Also include abjection device and cooling device, the interior warp tool is floating structure, by once oblique
Roll the hollow forging after elongator and interior warp tool sends into secondary skew rolling mill rolling together, interior warp tool is by deviating from device
After abjection, return to oblique milling unit foreground loop through cooling device and use.
As preferred：Also include restraint device, the interior warp tool is fixed by restraint device, steel pipe movement during rolling,
It is set to be advanced according to rolling requirements restraint using restraint device.
As preferred：The oblique milling roller number of skew rolling mill and secondary skew rolling mill is more than 2.
As preferred：Skew rolling mill upstream is provided with heating of pipe blank stove and punch, secondary Cross-rolling elongation
Machine downstream is provided with sizing mill or reducing mill.
Present invention simultaneously provides a kind of seamless steel pipe oblique roll process, including a kind of described seamless steel pipe oblique milling equipment, work
Skill specifically includes following steps：
A, by heating of pipe blank stove by heating of pipe blank to piercing temperature；
B, pipe are on punch by pierced billet into hollow billet；
C, using a skew rolling mill hollow billet is rolled；
Hollow forging and interior warp tool after d, an oblique milling send into secondary skew rolling mill rolling, secondary oblique milling and one together
Secondary oblique milling shares same interior warp tool；
E, by fixed/reducing mill to the hollow forging progress that roll calmly/tube reducing, be rolled into production tube.
As preferred：The wall thickness reducing amount that skew rolling mill is rolled to hollow billet is 2mm~10mm, secondary Cross-rolling elongation
The wall thickness reducing amount that machine is rolled to hollow forging is 0.5mm~4mm.
As preferred：Also include steps such as the cooling of production tube feeding cold bed, segmentation saw, finishing after the step e.
As described above, the beneficial effects of the invention are as follows：The present invention compared with prior art, a skew rolling mill and secondary
Skew rolling mill uses same interior warp tool, and an oblique milling and secondary oblique milling do not influence each other in rolling, without complexity
Speeds match problem, production is flexible, and rolled piece temperature drop is small, and thermal losses is small；Pass through a skew rolling mill and secondary Cross-rolling elongation
Deformation distribution between machine, can expand the range of product size of oblique milling unit production, and realize that multiple length is produced, and improve productivity ratio.
Brief description of the drawings
Fig. 1 is the equipment ralocatable mode arrangement schematic diagram of oblique milling unit of the present invention；
Fig. 2 arranges schematic diagram for the equipment restraint mode of oblique milling unit of the present invention；
Fig. 3 is oblique milling deformation principle schematic diagram of the invention；
Fig. 4 is process flow diagram of the invention.
Piece mark explanation
1 quick traverse displacement unit
2 oblique milling unit foregrounds
31 skew rolling mills
32 2 skew rolling mills
4 abjection devices
5 cooling devices
6 restraint devices
Warp tool in 7
81 skew rolling mill rolls
82 2 skew rolling mill rolls
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
As shown in figure 1, a kind of seamless steel pipe oblique milling equipment, by a skew rolling mill 31 and secondary skew rolling mill 32 etc.
Composition, shares same interior warp tool 7, using oblique milling roller as main warp tool, a skew rolling mill 31 and it is secondary tiltedly
The distance for rolling elongator 32 is the length L of steel pipe after not less than one time oblique milling.Also include being handled for internal warp tool 7
Abjection device 4 and cooling device 5, be provided with heating of pipe blank stove and punch a upstream of skew rolling mill 31, it is secondary tiltedly
Roll the downstream of elongator 32 and be provided with sizing mill or reducing mill etc..
Hollow billet after perforation is laterally moved to oblique milling unit foreground 2 by quick traverse displacement unit 1；Hollow billet penetrates interior warp tool 7
Rolled afterwards into a skew rolling mill 31, the hollow forging and interior warp tool 7 after an oblique milling send into secondary oblique milling together
Elongator 32, secondary oblique milling shares same interior warp tool 7 with an oblique milling, and the hollow forging rolled enters subsequent processing.It is described
The oblique milling roller number of skew rolling mill 31 and secondary skew rolling mill 32 is more than 2 number.
Further, described interior warp tool 7 is ralocatable mode, hollow forging after a skew rolling mill 31 and interior
After warp tool 7 is sent into secondary skew rolling mill 32 and rolled together, and use abjection device 4 deviates from interior warp tool 7, through cold
But device 5 returns to oblique milling unit foreground 2 and recycled.
As shown in Fig. 2 warp tool 7 can use restraint mode in the present invention, i.e., by restraint device 6 by interior deformation
Instrument 7 is fixed, and steel pipe travels forward in the operation of rolling.
Described interior warp tool 7, cooling device 5, abjection device 4 and restraint device 6 can be in the prior art
Know, will not be repeated here.
As shown in figure 4, present invention simultaneously provides a kind of seamless steel pipe oblique roll process, comprising the technical steps that：
A, by heating of pipe blank stove by heating of pipe blank to piercing temperature；
B, pipe are on punch by pierced billet into hollow billet；
C, using a skew rolling mill 31 hollow billet is rolled；Hollow forging and interior warp tool 7 one after oblique milling
The secondary skew rolling mill 32 of feeding is played, secondary oblique milling shares same interior warp tool 7 with an oblique milling；
D, by sizing mill or reducing mill sizing or tube reducing are carried out to the hollow forging rolled, are rolled into production tube, into cold bed,
It is segmented the subsequent handlings such as saw, finishing.
The oblique milling deformation principle of the present invention refers to Fig. 3, and a skew rolling mill 31 and secondary skew rolling mill 32 share same
The roller shape of warp tool 7 in one, a skew rolling mill roll 81 and secondary skew rolling mill roll 82 is oblique milling roller, once
Oblique milling wall thickness reducing amount is 2mm~10mm, and secondary oblique milling wall thickness reducing amount is 0.5mm~4mm, can roll out that surface quality is good, wall thickness accuracy
High light-wall pipe, expands the range of product size of oblique milling unit production, and realizes that multiple length is produced, and improves productivity ratio.
Preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, any person skilled in the art
All modifications and changes can be carried out to above-described embodiment under the spirit and scope without prejudice to the present invention.Therefore, affiliated technology such as
Have usually intellectual in field equivalent to repair in all without departing from disclosed spirit with being completed under technological thought
Decorations change, and should be covered by the claim of the present invention.
Claims (9)
1. a kind of seamless steel pipe oblique milling equipment, it is characterised in that：Including the skew rolling mill set gradually along rolling direction
With secondary skew rolling mill, a skew rolling mill and secondary skew rolling mill share same interior warp tool, it is described once
The distance between skew rolling mill and secondary skew rolling mill are more than or equal to the length of steel pipe after an oblique milling.
2. a kind of seamless steel pipe oblique milling equipment according to claim 1, it is characterised in that：Skew rolling mill and
The roller shape of secondary skew rolling mill is oblique milling roller.
3. a kind of seamless steel pipe oblique milling equipment according to claim 1, it is characterised in that：Also include abjection device and cooling
Device, the interior warp tool is floating structure, and hollow forging and interior warp tool after a skew rolling mill are sent into together
Secondary skew rolling mill rolling, interior warp tool returns to oblique milling unit foreground through cooling device and followed by deviating from after device abjection
Ring is used.
4. a kind of seamless steel pipe oblique milling equipment according to claim 1, it is characterised in that：Also include restraint device, it is described
Interior warp tool is fixed by restraint device, steel pipe movement during rolling.
5. a kind of seamless steel pipe oblique milling equipment according to claim 2, it is characterised in that：A described skew rolling mill
More than 2 are with the oblique milling roller number of secondary skew rolling mill.
6. a kind of seamless steel pipe oblique milling equipment according to claim 1, it is characterised in that：On skew rolling mill
Trip is provided with heating of pipe blank stove and punch, and secondary skew rolling mill downstream is provided with sizing mill or reducing mill.
7. a kind of seamless steel pipe oblique roll process, including a kind of seamless steel pipe oblique milling described in claim 1 to 6 any one is set
It is standby, it is characterised in that to comprise the following steps：
A, by heating of pipe blank stove by heating of pipe blank to piercing temperature；
B, pipe are on punch by pierced billet into hollow billet；
C, using a skew rolling mill hollow billet is rolled；
Hollow forging and interior warp tool after d, an oblique milling send into the rolling of secondary skew rolling mill together, secondary oblique milling with it is once oblique
Roll shared same interior warp tool；
E, by fixed/reducing mill to the hollow forging progress that roll calmly/tube reducing, be rolled into production tube.
8. a kind of seamless steel pipe oblique roll process according to claim 7, it is characterised in that：Skew rolling mill pair
The wall thickness reducing amount of hollow billet rolling is 2mm~10mm, and the wall thickness reducing amount that secondary skew rolling mill is rolled to hollow forging is 0.5mm~4mm.
9. a kind of seamless steel pipe oblique roll process according to claim 7, it is characterised in that：Also including after the step e will
The step of cooling of production tube feeding cold bed, segmentation saw, finishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545734.2A CN105080970B (en) | 2015-08-31 | 2015-08-31 | A kind of seamless steel pipe oblique milling equipment and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545734.2A CN105080970B (en) | 2015-08-31 | 2015-08-31 | A kind of seamless steel pipe oblique milling equipment and technique |
Publications (2)
| Publication Number | Publication Date |
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| CN105080970A CN105080970A (en) | 2015-11-25 |
| CN105080970B true CN105080970B (en) | 2017-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510545734.2A Active CN105080970B (en) | 2015-08-31 | 2015-08-31 | A kind of seamless steel pipe oblique milling equipment and technique |
Country Status (1)
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1960328C3 (en) * | 1969-12-02 | 1974-04-11 | Friedrich Dr.-Ing. 4000 Duesseldorf Kocks | Method and rolling mill for rolling out a tube billet |
| JPH07136703A (en) * | 1993-11-17 | 1995-05-30 | Nippon Steel Corp | Method for rolling seamless tube |
| JP3400272B2 (en) * | 1996-12-26 | 2003-04-28 | 川崎製鉄株式会社 | Rolling method for base pipe for seamless steel pipe |
| CN101337236A (en) * | 2007-07-06 | 2009-01-07 | 中冶东方工程技术有限公司 | Rolling mill technique of three-roller full-floating core rod tandem rolling tube |
| CN202762726U (en) * | 2012-09-06 | 2013-03-06 | 济南重工股份有限公司 | Production unit for hot-rolled seamless steel tubes |
| CN204912275U (en) * | 2015-08-31 | 2015-12-30 | 中冶赛迪工程技术股份有限公司 | Seamless steel pipe oblique milling equipment |
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| CN105080970A (en) | 2015-11-25 |
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