CN106573282A - Combined apparatus for rolling seamless tubes - Google Patents
Combined apparatus for rolling seamless tubes Download PDFInfo
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- CN106573282A CN106573282A CN201580041549.8A CN201580041549A CN106573282A CN 106573282 A CN106573282 A CN 106573282A CN 201580041549 A CN201580041549 A CN 201580041549A CN 106573282 A CN106573282 A CN 106573282A
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- plug
- rolling
- bar
- thrust
- longitudinal
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- 238000005096 rolling process Methods 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 claims abstract description 31
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- 239000004328 sodium tetraborate Substances 0.000 description 4
- 235000010339 sodium tetraborate Nutrition 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- 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
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
- B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
-
- 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
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The present invention relates to a plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which is designed to pierce a billet (11) pressed against a plug (22) mounted on a rod so as to obtain a pierced blank (12). The rod is connected to a thrust block (26) designed to oppose the axial thrust which is produced on the rod during piercing. The plant also comprises a longitudinal mill (30) which is designed to roll the pierced blank (12) on a mandrel (32) so as to obtain a semi-finished tube (13). The mandrel is connected to a retaining block (34) designed to impart to the mandrel a predetermined speed during rolling. In the plant according to the invention the thrust block (26) and the retaining block (34) are formed by a single thrust/retaining block (36). The invention also relates to a method for rolling a seamless tube.
Description
Technical field
The present invention relates to be used for rolled pipe, particularly for rolling the compact apparatus of seamless pipe.The invention further relates to be used for
The method of the mill operation.
Background technology
The known continuous plastic deformation by billet produces seamless metal pipe.By base in stove during first step
Ingot is heated to about 1280 DEG C.Then billet is supplied to rotary piercing machine, the rotary piercing machine includes a pair of inclined shaft rollers and peace
The top being mounted on bar.Roller promotes billet axially towards top so that axially along axis is perforated billet.Bar connects
To thrust block seat, the thrust block seat is designed to resist the axial thrust produced on bar in perforation procedure.
Therefore semi-finished product (being referred to as bore a hole blank or hollow body) are formed, the semi-finished product have heavy wall and length is original
1.5 to 4 times of beginning billet length.Then make the lateral displacement of perforation blank and therefrom extract top and bar out so as to insert use
In the plug of follow-up mill operation.The function of plug is internally to resist the radial thrust applied in the operation of rolling so that tube wall
It is thinning.
In order to complete bore a hole blank lateral displacement, top removing and plug insertion these operation, need it is a certain amount of
Time.During the time, perforation blank is exposed in the presence of air, and particularly air causes the temperature of perforation blank
Degree is reduced.Additionally, the effect of oxygen causes the rapid oxidation on surface in air.For this reason, deoxidation material is usually used (for example
Borax etc.) processed (i.e. deoxidation process).
As described above, and then by for the plug of follow-up mill operation insertion perforation blank.In some known devices, core
Rod is connected to holding seat, and the holding seat is designed to give plug predetermined speed in the operation of rolling.
Perforation blank then passes through many platform roll mills (hereinafter referred to as " longitudinal rolling mills ") with longitudinal material flowing,
Many platform roll mills can be by suitably reducing external diameter so that wall is gradually thinning, therefore increases the length of finished product.Just
As it is known, the roll mill includes multiple rolling units.Each unit includes a platform, installs on the platform and has into
The roller of type groove.One group of connection profile of the groove of roller defines the exterior contour of the pipe of rolled unit release.Longitudinally rolling
The downstream of machine, it is necessary to extract pipe out first from plug.According to prior art, the operation is by generally having three or more platforms
Another roll mill (being referred to as taking out tube mill) carry out.Taking out tube mill is slightly reduced the external diameter of pipe, and main purpose is to allow
Plug carries out necessary stroke so as to extract out from the semifinished tube (being referred to as " main pipe ") for just having produced.
Finally, pipe must sizing so as to more accurately limiting its external diameter.
Can respectively be performed by the stand-alone machine (being referred to as taking out tube mill, reducing rolling mill and precision mill) of respective number
These functions.More generally, individual machine can instead perform multiple functions, therefore such as acquisition is taken out pipe/tube reducing and rolled
Machine or tube reducing/precision mill.
Then pipe must only undergo detection operation and/or finishing operation.Detection operation can include for example using ultrasound wave
Non-destructive pressure test and inspection.Finishing operation can instead include cutting sizing, cleaning, japanning and mark
Note.
Above-described complete operation constitutes the core of pipe production technology, actually at the end of these operations, defines
The principal character (i.e. wall thickness and external diameter) of pipe.In the corresponding way, by rotary piercing machine, longitudinal rolling mills, take out tube mill, tube reducing and roll
The component of machine and/or precision mill composition defines the major part of device, also referred to as technology segment.Production scene is in building
Integral layout in terms of engineering and Structural Engineering must be based on technology segment and be designed.
On the other hand, detect that operation and/or the facility needed for finishing operation can be usually placed in the major part of device
Around and substantially do not constrained.
Known crossing current rolling (working in perforating machine) rolls the group of (working in many platform roll mills) with vertical stream
Conjunction ensure that the qualitative characteristics of final products better than the type by using laterally double rollings (i.e. with two perforating machinees)
Various constructions obtain qualitative characteristics.
It is known that close to roll mill downstream the rolling for keeping and extracting out plug online ensure that the quality and reliability of finished product
Much larger than the quality and reliability of other known construction, in the other known construction plug release and/or freely and with
Carry out the extraction of plug offline afterwards.
It is known that longitudinally rolling is applied to the high diameter/thickness ratio of acquisition to many platforms, wherein " diameter/thickness ratio " is managed
Solve as the ratio between the external diameter and the thickness of tube wall that represent pipe.Especially, by many platforms diameter/thickness that longitudinally rolling is obtained
Degree ratio reaches the value of about 48-50, i.e., far above the ratio obtained using other inhomogeneities constructions, for example, obtained using double rolling of crossing current
The ratio for obtaining is typically smaller than 30-35.
Although extensively establishing the known devices of the above-mentioned type, it on the whole can not be satisfactory.
Normally, described device is designed to realize optimal pipe production with great scale (such as 500,000 ton/year).
In view of this large-scale production and for abundant exploitation scale economy, it is known that the device of type produces so-called pair of length half
Production tube, i.e. length are up to about 32 meters.All sizes of obvious device must be based on the final pipe size and be defined.The size
The main building of production scene is for example caused to have the size of the market size that is above standard with other parameters.Such building
May for example have close 45 meters of main span away from the length with size more than 900 meters.As those skilled in the art can understand
Understand, close 45 meters of span needs to construct ad hoc crossbeam construction and bridge crane, because not existing with the chi
Very little pre-constructed unit.
Equally for those reasons, the construction (including civil engineering and Structural Engineering) of whole device needs huge initial
Investment, therefore economic well-being of workers and staff is only just can guarantee that in above-mentioned large-scale production.
In addition to this large-scale production device, also exist for small-scale production (50,000 tons/year or less)
Device.These devices need much smaller initial outlay and are typically employed in process yield and production process costs per ton
The lower technology of the older and efficiency of aspect.
Be designed to the said apparatus of large-scale production is also affected by other problems.For example, will perforation blank from wearing
Hole machine is transported to longitudinal rolling mills may need 50 to 70 seconds.During the time, perforation blank tends to function of environment heat emission,
Therefore (shape of the perforation blank is depended on generally between about 1050 DEG C and about 1150 DEG C under conditions of substantially cooler
At a temperature of) reach longitudinal rolling mills.It is apparent that the temperature drop of perforation blank is more, it is necessary to which the power applied by roll mill increases
More could obtain desired material plasticity deformation.The value for needing the power for applying determines the actuator and motor of roll mill
The power consumption of size and roll mill in the operation of rolling.
As described above, when the top of rotary piercing machine is extracted, the inner chamber of blank of boring a hole is hit by surrounding air flowing
Hit, the oxygen content of atmospheric air inevitably results in and phosphorus skin is formed on the inner surface of perforation blank.The effect is must be prevented from,
Because the presence of phosphorus skin can cause to form unacceptable defect during subsequent process steps in pipe.For this purpose,
The inside of perforation blank is processed with antioxidant (such as Borax or similar substance).As those skilled in the art can hold
Intelligible, due to the toxicity of material used, the commercial Application of these materials causes the main of Environmental security and safety of workers
Problem.
Additionally, the needs of anti-oxidant treatment have been negatively affected with perforation blank between rotary piercing machine and longitudinal rolling mills
Transfer time and the holistic cost of production technology.
The content of the invention
Therefore it is an object of the present invention at least partly overcome disadvantages mentioned above associated with the prior art.
Especially, task of the invention is to provide the more compact device for rolling seamless pipe.
And, the task of the present invention is to provide for the device of hot rolling seamless pipe, and described device is from due to normal production
During reduction, power consumption and gas consumption, emission level and pollutant environmental point of view from the point of view of be sustainable development.
And, the task of the present invention is to provide compact apparatus for rolling seamless pipe, and described device can be avoided or extremely
Few perforation blank that reduces is exposed to the negative effect of air, therefore reduces the formation of phosphorus skin and increase the yield of device.
Finally, task of the invention is to provide the compact apparatus for rolling seamless pipe, described device need it is less just
Low running cost is invested and allowed to keep to beginning.
Above-mentioned purpose and task by device according to claim 1 and method according to claim 12 come
Realize.
Description of the drawings
The feature and further advantage of the present invention will be highlighted by the description of the multiple embodiments provided below with reference to accompanying drawing
Out, the embodiment is provided by way of non-limiting example, in the accompanying drawings：
- Fig. 1 shows the plane graph of the complete rolling device according to prior art；
- Fig. 2 is showing the plane graph of complete rolling device of the invention with Fig. 1 identical ratios；
- Fig. 3 shows the technology segment of the device according to prior art represented by the III of Fig. 1；
- Fig. 4 is showing the technology segment of the device of the invention represented by the IV of Fig. 2 with Fig. 3 identical ratios；
- Fig. 5 shows the plane graph of the of the invention device similar to Fig. 4；
- Fig. 6 shows the detail view of the device part of the invention represented by the VI of Fig. 5；
- Fig. 7 shows the possible variant form of device shown in Fig. 6；
- Fig. 8 shows another possible variant form of the device according to Fig. 6；
- Fig. 9 shows the plug used in some devices of the invention；
- Figure 10 shows the bar used in some devices of the invention；And
- Figure 11 shows a type of plug/bar assembly used in some devices of the invention；And
- Figure 12 shows the another type of plug/bar assembly used in some devices of the invention.
Specific embodiment
Device for rolling seamless pipe of the invention is represented on the whole with 10.It includes：
- rotary piercing machine 20, the rotary piercing machine 20 includes two inclined shaft rolls and the top on bar 24 22,
Rotary piercing machine 20 limits milling axis XPRWith rolling direction (rolling sense) and it is designed to：
- solid billet 11 is received in its porch,
- towards 22 pairs, top billet 11 complete perforated is carried out so as to obtain perforation blank 12, and
- release is bonded on the perforation blank 12 on the bar 24 of top 22；
- longitudinal rolling mills 30, the longitudinal rolling mills 30 include multiple rolling platforms with scalable motor driven rolls
(rolling station) 32, longitudinal rolling mills 30 limit milling axis XLLWith rolling direction and it is designed to：
- the perforation blank 12 discharged by rotary piercing machine 20 is received in its porch；
- perforation blank 12 is rolled on plug 32 so as to obtain semifinished tube 13, and
- release semifinished tube 13.
And the bar 24 of the top 22 of rotary piercing machine 20 is connected to thrust block seat 26, the thrust block seat 26 is designed to opposing
The axial thrust that produces on the bar 24 in perforation procedure and being designed to gives required before and after bar 24 and the perforation of top 22
It is mobile；And
The plug 32 of longitudinal rolling mills 30 is connected to holding seat 34, and the holding seat 34 is designed to be given in the operation of rolling
The predetermined speed of plug 32 and it is designed to give required movement before and after plug 32 is rolled.
And, in compact apparatus of the invention 10, rotary piercing machine 20 and longitudinal rolling mills 30 roll with identical
Direction processed；And thrust block seat 26 is obtained by single thrust/holding seat 36 and seat 34 is kept.
With reference to rolling device 10, rotary piercing machine 20 limits milling axis XPRAnd longitudinal rolling mills 30 limit milling axis
XLL.Due to milling axis XPRAnd XLLIt is parallel to each other, therefore " axial direction " or " longitudinal direction " represents the rectilinear direction parallel to axis.Phase
As, it is " horizontal " to represent the rectilinear direction for being not parallel to axis.Finally, " lateral " or " vertical " expressions roll axles perpendicular to two
The half line direction of one of line.
Also, procedure of processing is particularly limited to rolling direction.For example " before ", the statement of " front ", " upstream " etc. represents edge
The position that milling axis are relatively close to device starting point.On the other hand, for example " afterwards ", the statement table of " rear ", " downstream " etc.
Show along milling axis and be relatively close to the position of device terminal.According to the above, it should be understood that the upstream end of workpiece is also referred to as
" tail end ", and downstream is also referred to as " head end ".
As described above, rotary piercing machine 20 and longitudinal rolling mills 30 have identical rolling direction, i.e., axially
Same orientation.In other words, with particular reference to Fig. 5 to 8, during milling step, (it has title to workpiece in each stage
" billet " 11, " perforation blank " 12 and " semifinished tube " 13) are moved from right to left and do not overturn its direction for moving axially：Wearing
Axis X of the workpiece along rotary piercing machine 20 during holePRMove from right to left；Then its edge during longitudinally rolling
The axis X of longitudinal rolling mills 30LLMove from right to left.According to some embodiments (referring particularly to Fig. 5 and 6), from perforating machine 20
In perforation blank 12 out be also subject to lateral displacement so as to from axis XPRReach axis XLL.According to other embodiments (especially
Referring to Fig. 7 and 8), perforation blank 12 replaces and need not undergo any lateral displacement, because axis XPRAnd XLLUnanimously.According to this
Some embodiments of invention, workpiece (such as bore a hole blank 12) it is also possible on the direction contrary with rolling direction slightly position
Move, but just occur in such case moving process only required between two continuous rolling steps.
As described above, in device of the invention 10, thrust block seat 26 and holding seat 34 are by single thrust/holding seat
36 form.With regard to this specification, statement " thrust block seat 26 " and " holding seat 34 " simply in esse list in device for limiting 10
Two kinds of different logic functions of individual seat (being referred to as " thrust/holding seat 36 ").
Some embodiments of the invention, thrust/holding seat 36 includes the He of the first grip unit 260 for bar 24
It is arranged on identical thrust support unit 362 for the second grip unit 340 of plug 32, and two grip units.
Therefore more particularly, thrust/holding seat 36 includes the first grip unit 260 that bar 24 is connected.Installed in thrust
The first grip unit 260 on support base 362 especially be designed to supporting rod 24 and axial thrust be transferred to into thrust
Support unit 362；The transfer of the axial thrust produced on bar 24 in perforation procedure is particular importance.Actually in perforation procedure
In, roller promotes billets 11 and thrust to be transferred to the first grip unit 260 via bar 24 and is then passed to the towards top 22
One thrust support unit 362.Thrust support unit 362 is designed to for the thrust to be transferred to ground in itself.Additionally, thrust/guarantor
Hold seat 36 to be also devised to give bar 24 and the rear required movement before the rolling of top 22.Thrust support unit 362 actually by
It is designed to the first grip unit 260 is moved together with bar 24 and top 22.These movement in the axial direction occur and
It is designed to make top 22 be moved to operating position from resting position, vice versa.
According to some embodiments, the first grip unit 260 is also devised to so that bar 24 and top 22 are around rolling axle
Line XPRCarry out pre-rotation.The probability for obtaining the pre-rotation of top 22 in some cases is particularly advantageous, because it is with
The mode known allows the perforation for promoting billet.
In turn, thrust/holding seat 36 that the plug 32 of longitudinal rolling mills 30 is connected is advantageously comprised installed in thrust
The second grip unit 340 on support unit 362.Thrust/holding seat 36 especially be designed to clamp plug 32 and in rolling
During give the predetermined speed of plug 32.Actually in the operation of rolling, the roller of longitudinal rolling mills is promoted in the axial direction to be worn
Hole blank 12 and thrust is transferred to into plug 32.Plug 32 is clamped securely and therefore produced by the second grip unit 340
Axial thrust be transferred to thrust support unit 362.Thrust support unit 362 is designed to be transferred to ground by the thrust in itself
Face.If plug 32 is not kept, it may slide along longitudinal rolling mills 30 together with perforation blank 12.On the other hand, exist
In such device, plug 32 is braked by thrust/holding seat 36.Thrust/holding seat 36 is also devised to give plug
Required movement before and after 32 rollings.These movements occur in the axial direction and are intended to make plug 32 be moved to from resting position
Operating position and from the semifinished tube 13 discharged by longitudinal rolling mills 30 extract out plug 32.
By combining thrust block seat 26 in the form of single thrust/holding seat 36 and keeping the scheme of seat 34, can be along position
Simplified partial rolling device 10 between rotary piercing machine 20 and longitudinal rolling mills 30.Especially, the cooperative effect source for being obtained
Must be designed to exert a force in the axial direction and displacement from thrust block seat 26 and holding seat 34.Therefore in thrust/holding seat 36,
The bar 24 (i.e. so as to move and bear its thrust) and longitudinal rolling mills 30 of rotary piercing machine 20 can be controlled by individual system
Plug 32 (i.e. so as to mobile and kept).For example, the system for moving thrust support unit 362 can
With by can be constituted by the bracket of the little gear that engages along tooth bar movement or by can be by cable or chain along guide rail
Mobile bracket composition.
The favourable variant form of embodiment of the present invention is：In addition to single thrust support unit 362, only
Pushing away/keep seat 36 also includes single grip unit 360.Single grip unit 360 be designed to supporting rod 24 and plug 32 and
Corresponding axial thrust is transferred to into thrust support unit 362.The variant form of the embodiment considerably improves cost, space
Mechanical cooperative effect and each several part of circulation time between.And, according to some embodiments, single grip unit 360 is also
It is designed such that bar 24 and top 22 around milling axis XPRCarry out pre-rotation.
Also, by replacing thrust block seat 26 with single thrust/holding seat 36 and keeping seat 34, it is obtained in that device 10 vertical
The more preferable compactedness on direction.
Some embodiments of device of the invention 10, the bar 24 in the exit of rotary piercing machine 20 vertically with core
Rod 32 align and with the end directly contact of plug 32.Perforation blank 12 therefore can from bar 24 directly slide into plug 32 from
And can be carried away to carry out longitudinal rolling.
Some embodiments of device of the invention 10, advantageously milling axis XPRAnd XLLUnanimously.This means to move back
Going out the perforation blank 12 of rotary piercing machine 20 can be supplied directly into longitudinal rolling mills 30, and without the need for carrying out any lateral position to it
Move.Still perforation blank 12 on the bar 24 of rotary piercing machine 20 is bonded on by simple axial movement with simply and rapidly
Mode is reached near the plug 32 of longitudinal rolling mills 30.Preferably the axial movement, non-row can be carried out by suitable known device
His property for example, the equipment can be commonly referred to as the pressure type of " pinch roll " or the chain type with pin or
The motor driven rolls of similar type.
Some embodiments of device of the invention 10, the bar 24 of rotary piercing machine 20 is structurally connected to longitudinal direction
The plug 32 of milling train 30.The program allows the movement for simplifying instrument (i.e. two instruments), because the institute during operating procedure
It is connected to each other with stating tool construction.The perfect alignment of two instruments can also be realized in this way, and this allows perforation base
12 easily displacements of material are without there is undesirable difficulty.
Particularly advantageously such embodiment：Single clamping of the plug/bar assembly 324 together with thrust/holding seat 36
Unit 360 is used together.The program is actually particularly compact.
Especially, bar 24 is structurally connected to the embodiment of the device 10 of plug 32 and can advantageously use two kinds of sides
Case.According to the first string, bar 24 and plug 32 are formed as a part, and according to second scheme, bar 24 and plug 32 can
Link together to release.Two schemes have particular advantage and positive feature, can select one according to specific needs
Scheme rather than another scheme.
With regard to plug 32 and bar 24 or the hereinafter referred to as individual tool of " plug/bar assembly 324 ", it is necessary to consider such as lower section
Face：It is for about 15 meters of semifinished tube that rolling device of the invention 10 is preferably designed to roll single length pipe, i.e. length.Just
As those skilled in the art will be readily understood that by accompanying drawing 5, all key dimensions based on the dimension limitation device 10.Examine
Consider the final size of pipe and the ratio of elongation of each procedure of processing, about 8 meters of bar 24 of length and plug 32 can be limited
About 15 meters of length.
In view of this, it can be readily appreciated that in the case where determining using plug/bar assembly 324, how to control described
Instrument does not just result in any problem.In fact, the distance between rotary piercing machine 20 and longitudinal rolling mills 30 more than above-mentioned plug/
Therefore the total length of bar assembly 324 allows plug/bar assembly 324 to be easily moved (including shifted laterally), so as to for example tight
Transformation after being rolled or emptied in the case of urgency.
And, the instrument may have the total length less than 25 meters, therefore logical with the conventional equipment of the double length pipes of production
The length of the plug for often using is consistent.
Also, the conventional plug suitable compared to length and weight, plug/bar assembly 324 represents more economical scheme.
Actually conventional plug must have the Jing for being referred to as " valuable part " 320 for almost extending on its whole outer surface to process table
Face (such as chromium plating or with similar polish).On the other hand, plug/bar assembly 324 only need to be in the part for serving as plug 32
There is treated surface on outer surface, and the part for serving as bar 24 need not carry out any this kind of process (referring further to Figure 11 and 12).
Additionally, therefore, it is possible to using be referred to as the suitable known system of " three-piece part (tern) " (not shown) from
And constrain the component of plug/bar 324 in perforation procedure due to the part that compression load is stressed, so as to avoid flexing, i.e.,
Due to the unstability that axial load is caused.Meanwhile, three-piece part do not interfere plug/bar assembly 324 be intended to for longitudinal direction roll
The valuable part 320 of system, the surface of the part is anticipated using lubricant (usually graphite treated lubricant)
So as to be used for follow-up longitudinal direction rolling.Because three-piece part is not contacted with the valuable part 320 of plug/bar assembly 324, therefore point
Lubricant of the cloth on valuable part 320 kept good condition before the moment of mill operation.This aspect allows to be obtained
Production tube better quality, on the other hand allow to keep the valuable part 320 of plug, therefore increase its working life.
As described in the operation with regard to device 10, during eleven punch 11 is entered by rotary piercing machine 20, bar 24 is vertically
Rest on thrust/holding seat 36, the thrust/holding seat 36 is intended to for the axial thrust applied by roller to be transferred to billet 11
Then axial thrust is transferred to the top 22 of rotary piercing machine 20 from billet 11.In punch off, two clampings are removed single
First 260 and 340 (or single grip units 360 in some cases) are so as to the movement of the blank 12 that allows to bore a hole.Once perforation base
Material 12 is bonded on plug 32, and plug 32 is coupled to the second grip unit 340 or single grip unit 360.Thrust/holding seat
36 are intended to apply pull strength so as to give plug 32 predetermined axially speed in the operation of rolling in longitudinal rolling mills 30 to plug 32
Degree.
If milling axis XPRAnd XLLUnanimously, then the movement of perforation blank 12 just reduces simple to axial direction
Displacement.According to above-mentioned commentary, those skilled in the art will be understood the simple axial displacement of perforation blank 12 how by it
Move and its be decreased to minimum transfer time.More particularly, compared to known devices needed for the about 50-70 seconds, bore a hole blank 12
Therefore only about 15 seconds are limited to from the transfer time of the entrance for being exported to longitudinal rolling mills 30 of rotary piercing machine 20.When this is shorter
Between during, blank 12 of boring a hole distributes the heat of much less to environment, therefore (depends on described wearing under conditions of substantially hot
The shape of hole blank 12 is generally at a temperature of between about 1210 DEG C and about 1240 DEG C) reach longitudinal rolling mills 30.
And, perforation blank 12 is directly moved to plug 32 (or or even more simply along plug/bar assembly from bar 24
324 displacements) avoid its inner chamber and filled and avoided by surrounding air and undergo oxidation.In this way, it is to avoid necessary
What is carried out is typically based on the known anti-oxidant treatment of Borax.
As for rotary piercing machine 20, it can be the perforating machine with barrel roll or the perforating machine with tapered roller.This two
The scheme of kind is not described herein, because they are well known to a person skilled in the art and with specific advantages and actively
Feature, can select a kind of scheme rather than another kind of scheme according to specific needs.
As described above, rotary piercing machine 20 is designed to receive solid billet 11 in its porch and carry out it completely
Bore a hole so as to obtain perforation blank 12.In other words, rotary piercing machine 20 forms the through hole blank 12 that causes to bore a hole in the billet 11 and is in
Now from the form of the short thick pipe of a lateral opposite side complete perforated.
Rotary piercing machine 20 is cross rolling machine, i.e., wherein the rotation axiss of roll are inclined." inclination " represents milling axis
It is not parallel to each other and not in same level.
Longitudinal rolling mills 30 can be being designed in slightly different form.Normally, the roll mill advantageously has roller
Son, the roller is radially movable so as to adjusting its position and thus adjusting the power applied in the operation of rolling, so as to cause
Semifinished tube 13 is formed by perforation blank 12.
Roll mill 30 is longitudinal roll mill, i.e. the axis of the roll of each platform is located in identical plane, the plane
It is orthogonal with milling axis.
And, longitudinal rolling mills 30 are the types with motor driven rolls, i.e., realize perforation blank by the rotation of the roller
12 along milling axis XLLMovement.Compared to other schemes for realizing movement by different way, the program is carried in a known way
For advantage.For example, in the scheme of " thrust workbench " is referred to as, by with positioned at roll mill upstream unit promote plug from
And realize along milling axis XLLMovement.This semifinished tube of inevitable requirement plug ratio from roll mill out is considerably longer.And
And, in order to obtain the thrust on plug, needing to arrange special thrust unit in the upstream of roll mill, the thrust unit is more
It is complicated and volume is also huge.Additionally, the program requires that the head end of perforation blank should have the shape that can bear plug thrust
Shape.Due to the shape, it is necessary to the head end of perforation blank is cut away from pipe, the reduction of unit efficiency is thus resulted in.
As described above, longitudinal rolling mills 30 are designed to be rolled on plug (plug being particularly kept).It is actual
On, keep seat 34 that the predetermined speed of plug 32 is given in the operation of rolling.Especially, the axial velocity for giving plug 32 is more than 0mm/
S and less than 4000mm/s.
Give in the operation of rolling speed of plug 32 therefore by device of the invention from known type it is various its
Its device is distinguished.Actually in known device：
- plug is locked, i.e. the axial velocity with 0m/s；
- plug completely free (or floating), i.e., with axial velocity unknown in advance；And
- plug is promoted by upstream units, i.e., with the axial velocity of the head end equal to perforation blank.
According to some embodiments of device 10, the type of longitudinal rolling mills 30 is that each rolling platform includes two rollers.
Such longitudinal rolling mills are particularly compact, reliability and low cost.For example according to such roll mill, due to each station
Two rollers of platform are operated by identical motor, therefore using equal number of with the number for rolling platform included in it
Motor is enough.This substantially produces excellent in terms of initial cost, operation consumption, complexity (lower) and global reliability
Point.
According to other embodiments of device 10, the type of longitudinal rolling mills 30 is that each rolling platform includes three rollers.
Such longitudinal rolling mills are especially accurately and suitable for producing high-quality pipe.For example according to such roll mill, often
Three rollers of individual platform are controlled the exterior contour so as to deformation force to be transferred to pipe in the way of special rule.This is obvious
Produce the advantage in terms of the quality of final products.
As for longitudinal rolling mills 30, both schemes are not described herein, because they are those skilled in the art
It is known and with specific advantages and positive feature, a kind of scheme rather than another kind of scheme can be selected according to specific needs.
According to some embodiments, device of the invention 10 is also included for extracting plug 32 out from semifinished tube 13
Striker fork 40.The striker fork is disposed immediately in the downstream of longitudinal rolling mills 30 and is designed to replace present in conventional equipment
Take out tube mill.At the end of the rolling of semifinished tube 13, semifinished tube 13 exits longitudinal rolling mills 30 and keeps shorter part to connect
Close on plug 32.Actually longitudinal rolling mills give pipe obvious axial velocity, and are included in the quilt of plug 32 in longitudinal rolling mills
Upstream keeps seat 34 to keep.This causes the relative slip of pipe 13 and plug 32, therefore pipe 13 and plug 32 almost to be taken out out completely.
Once pipe exits longitudinal rolling mills 30, striker fork 40 is held in place and can be enough by applying via thrust/holding seat 36
Axial thrust force extracts backward plug 32 out.
Just as readily understood by the skilled person, replaced for example with the simple and compact equipment of such as striker fork 40
Take out the obvious advantage of the complexity and bulky machine generation of tube mill in terms of compactedness, simplicity and global reliability.
After extracting out from semifinished tube 13, plug 32 must be subjected to a series of process just can be reused.Process master
To include suitable cooling and be surface-treated using the lubricant for being typically based on graphite.Be intended to for these process it is special
Platform is arranged on the side of rolling device 10.
In the downstream of striker fork 40, device of the invention 10 can also include Tension-reduced rolling mill 50, wherein described
Small-sized induction furnace 60 can be advantageously provided before milling train.Tension-reduced rolling mill 50 is designed to receive semi-finished product in its porch
Pipe 13 and at least dependent on its principal character (i.e. wall thickness and external diameter) release production tube 14.Under Tension-reduced rolling mill 50
Trip, if necessary, production tube 14 can undergo other auxiliary operations, such as detection operation and/or finishing operations.
If the temperature of semifinished tube 13 is reduced at the position of the upstream close to Tension-reduced rolling mill 50 of device 10, tightly
It is favourable that the upstream of adjacent Tension-reduced rolling mill 50 has induction furnace 60.With regard to above-mentioned commentary, this temperature should be avoided from reducing
Or negligible level is held it in, but the use of induction furnace 60 is probably favourable under some particular cases.
For example, in the case of high-alloy steel pipe, it can be advantageous to raise the temperature needed for rolling in Tension-reduced rolling mill 50 so as to subtract
Little rolling stress.Additionally, in the case where pipe has extremely thin wall (even if such pipe also can during less movement
Undergo more coolings), it is probably favourable to rise high-temperature during the step.
Here should be noted that induction furnace 60 constitutes particularly compact and simple scheme so as to tackle the temperature for raising semifinished tube 13
The needs of degree.The stove is of virtually especially little size, because it passes through shorter passage simply forming, semifinished tube 13 exists
It is axially displaced in the passage.Faradic current is produced in the metallic object of pipe for special circuit and these electric currents determine it
Heat.
According to other embodiments of device 10, Tension-reduced rolling mill 50 can be replaced by precision mill.Can be based on spy
Provisioning request (size of such as production tube) selects a kind of scheme rather than another kind of scheme, without producing not to advantages of the present invention
Affect sharply.
Rolling device of the invention 10 also includes a series of disengaging paths, and it was in case of emergency (i.e. when rolling
When breaking down in journey) it is proved to be particularly advantageous.
First disengaging path 71 is located at the side in the path supplied billet 11 to rotary piercing machine 20.Along roll line
In the case that any kind of problem occurs in road, the disengaging path 71 can be used for abandoning the billet 11 for preparing rolling.In the feelings
Under condition, it is actually unable in billet being supplied to perforating machine 20, because downstream unit can not receive it before current problem is solved
Its part.
In the case of going wrong in perforation procedure, in fact it could happen that situation be billet 11 may still by top
22 anterior displacement and from top 22 extract out.Therefore, in which case it is possible to the bar 24 and top from the downstream of rotary piercing machine 20
22 billets 11 for extracting only local perforations out.In order to extract top 22 out from the billet 11 of local perforations, it can be advantageous to use the
One emergent fork, the fork is designed to for billet 11 to keep in situ, while extracting bar 24 and top 22 out forward.By thrust/guarantor
Holding seat 36 carries out coming directly towards the extraction forward of 22 and bar 24.
Then for example the billet 11 of only local perforations can laterally or vertically be removed by crane, while can lead to
Cross normal removing bar 24 and the top 22 of laterally logging off for using after rolling.
Similarly, if top 22 keeps being stuck in billet 11, it is also possible to supply forward together in the downstream of perforating machine 20
Two parts and by its lateral discharge.Particularly when when bar 24 and plug 32 structurally link together, it is a kind of possible
Laterally leave be plug 32 normal exit path.Alternatively possible disengaging path is vertical and by crane reality
Existing, the crane can lift the component being made up of the bar 24 of billet 11 and insertion billet 11, therefore remove from rolling circuit
Remove the component.Other operations needed for top 22 are removed from billet 11 now suitably can enter offline in known manner
OK.
Second disengaging path 72 and Three Cut Off's path 73 are arranged on the outlet for semifinished tube 13 of longitudinal rolling mills 30
Near.In the case of going wrong in longitudinal operation of rolling, in fact it could happen that situation be that perforation blank 12 may be still through
The rearward displacement of plug 32 and be extracted from plug 32.Therefore in this case, the only perforation blank 12 of local rolling can be
The downstream of longitudinal rolling mills 30 moves forward and laterally removes from this into second and departs from path 72.
In order to extract plug 32 out from the perforation blank 12 of local rolling, it is advantageously able to according to circumstances use striker fork 40
Or the second emergent fork 42 (its be disposed immediately in the upstream of longitudinal rolling mills 30 and be designed to will perforation blank 12 keep in situ),
Extract plug 32 out backward simultaneously.The extraction backward of plug 32 is carried out by thrust/holding seat 36.
On the other hand, such as plug 32 keeps being stuck in perforation blank 12, can be in the downstream of longitudinal rolling mills 30 along the 3rd
Depart from path 73 and supply two parts further along, the Three Cut Off's path 73 essentially forms the outlet of longitudinal rolling mills 30
Extension.In this case, the roll of the platform of longitudinal rolling mills 30 is by the adjustment equipment that normally uses in the operation of rolling
The outside of occupied volume is arranged on, so as to allow perforation blank 12 and the plug 32 of insertion perforation blank 12 to pass through.
Now can be suitably offline in known manner except other operations needed for de-cored bar 32 from perforation blank 12
Carry out.
According on the other hand, the invention further relates to be used to roll the method for seamless pipe.The method according to the invention include as
Lower step：
- solid billet 11 is provided；
- rotary piercing machine 20 is provided, the rotary piercing machine 20 limits milling axis XPRWith rolling direction and including two
Individual inclined shaft roll and the top on bar 24 22；
- longitudinal rolling mills 30 are provided, the longitudinal rolling mills 30 limit milling axis XLLWith rolling direction and including multiple tools
There is the rolling platform of scalable motor driven rolls, longitudinal rolling mills 30 are designed to the rolling perforation blank 12 on plug 32；
- solid billet 11 is supplied to rotary piercing machine 20；
- towards 22 pairs, top billet 11 complete perforated is carried out so as to obtain perforation blank 12；
The axial thrust produced on bar 24 in-opposing perforation procedure；
- release is bonded on the perforation blank 12 on the bar 24 of top 22；
- make perforation blank 12 that the plug 32 of longitudinal rolling mills 30 is moved to from the bar 24 of top 22；
- perforation the blank 12 that will be engaged on plug 32 is supplied to longitudinal rolling mills 30；
- perforation blank 12 is rolled on plug 32 so as to obtain semifinished tube 13；
- plug 32 is kept so as to give the predetermined speed of plug 32 in the operation of rolling；And
- release semifinished tube 13.
And, in the method according to the invention, rotary piercing machine 20 and longitudinal rolling mills 30 have identical rolling direction,
And the step of axial thrust put up a resistance on bar 24 by single thrust/holding seat 36 and holding plug 32.
According to some patterns for implementing the method for the present invention, rotary piercing machine 20 limits milling axis XPR, longitudinal rolling mills 30
Limit milling axis XLL, and milling axis XPRAnd XLLUnanimously.
As those skilled in the art know that, rolling device of the invention and method overcome at least in part
With reference to the shortcoming of description of the prior art.
Especially, those skilled in the art are clearly understood that and are obtained in that particularly compact rolling device 10 by the present invention
Feature formed advantage.Thus, the main building of such as Workplace can have much smaller size.As for technology
Region (display in Fig. 3 and 4), the width ratio conventional equipment little 15% to 30% of device of the invention, and length is little by 60%.
Just as the skilled person is fully understood, this space reduces a large amount of sections caused in terms of initial outlay and management cost
About.For example, the span for about 30 meters present in device of the invention, it is possible to use prefabricated crossbeam is constructed and bridge-type
Crane, therefore the especially enhanced bridge crane compared to such as 45 meters or needed for more large span allows for a large amount of sections
About.
In view of the overall dimensions of production line (showing in Fig. 1 and 2), the area occupied by device of the invention is compared
50% is reduced in conventional equipment.
Additionally, those skilled in the art know how to be greatly reduced according to (particularly in some embodiments) of the invention
Movement of the perforation blank 12 between the outlet of rotary piercing machine 20 and the entrance of longitudinal rolling mills 30.Therefore in longitudinal rolling mills 30
The obvious temperature difference that porch occurs is being mentioned above, and the temperature has 1210-1240 DEG C rather than 1050-1150 DEG C of scope
Interior value.The effect of the temperature can be completely understood when those skilled in the art consider following true according to the test for being carried out
Really：Applicant have determined that each station that device of the invention 10 can be used in the case of all other condition identical
The nominal rolling power of platform is lower than the device of known type or even 35%.
Similarly, due to device of the invention 10, the power consumption in course of normal operation can be reduced.As drop
One alternative form of low power consumption, the tool that can not be processed using other devices can be rolled using device of the invention
There is the steel of more highly adhesive content (binder content).
Other effects that the transfer time of perforation blank 12 is reduced are related to the control of plug 32.First, perforation blank 12
Higher temperature cause stress less on the outer surface of plug 32, thus result in less abrasion.And, blank 12 of boring a hole
Less transfer time causes shorter total cycle time, and this causes to reduce necessary in apparatus 10 in order to ensure operation
The number of simultaneous plug 32.The plug number is equal to about 6 or 7 in the case of conventional equipment, of the invention
Reduce in device to 3.Have clearly a need for considering the valuable part 320 of the single plug 32 used in device of the invention 10 about
For the half of conventional plug 32.
All these aspects mentioned above cause the obvious saving related to the overall control of plug 32.With regard to plug,
Because the less gross area on the surface of pending surface treatment (such as treats the valuable part 320 of the plug by chromium plating process
Less area) be multiplied by the less total number of plug 32, obtain less environmental effect.
Another particularly advantageous aspect is that the deoxidation that can be completely eliminated based on Borax is processed.In this way, no
Only avoid to the setting for processing platform and using related cost, and without using toxicant, therefore reduce environment
Affect.Have also obtained perforation blank 12 more rapidly to shift, it is extremely thin in perforation blank 12 and be thus subject to rapider cold
But in the case of, this is particularly advantageous for hot related causes.
In order to meet particular requirement, those skilled in the art can be to the device for rolling seamless pipe of the invention
Modify with the embodiment of method and/or substitute described part with equivalent unit, without departing from claims
The scope of book.
Claims (11)
1. it is used to roll the compact apparatus (10) of seamless pipe, including：
- rotary piercing machine (20), the rotary piercing machine (20) includes two inclined shaft rolls and the top on bar (24)
(22), rotary piercing machine limits milling axis XPRWith rolling direction and it is designed to：
- solid billet (11) is received in its porch,
- complete perforated is carried out to billet (11) towards top (22), and
- release is bonded on the perforation blank (12) on the bar of top (22) (24)；
- longitudinal rolling mills (30), the longitudinal rolling mills (30) include multiple rolling platforms with scalable motor driven rolls, longitudinal direction
Milling train limits milling axis XLLWith rolling direction and it is designed to：
- the perforation blank (12) discharged by rotary piercing machine is received in its porch；
- rolling perforation blank (12) on plug (32), and
- release semifinished tube (13)；
Wherein：
The bar (24) of the top (22) of-rotary piercing machine (20) is connected to thrust block seat (26), and the thrust block seat (26) is designed to
Before the axial thrust that produces on the bar (24) in opposing perforation procedure and being designed to gives bar (24) and top (22) is bored a hole
Required movement afterwards；And
The plug (32) of-longitudinal rolling mills (30) is connected to holding seat (34), and holding seat (34) is designed in the operation of rolling
It is middle to give plug (32) predetermined speed and be designed to give movement required before and after plug (32) rolling；
And rotary piercing machine (20) and longitudinal rolling mills (30) are with identical rolling direction；And thrust block seat (26) and holding seat
(34) formed by single thrust/holding seat (36).
2. device (10) according to claim 1, wherein thrust/holding seat (36) including the first grip unit (260) and
Second grip unit (340), first grip unit (260) is designed to supporting rod (24), second grip unit
(340) it is designed to clamp plug (32), two grip units are arranged on single thrust support unit (362).
3. device (10) according to claim 2, wherein first grip unit (260) of thrust/holding seat (36) and
Two grip units (340) form single grip unit (360).
4. the device (10) according to aforementioned any one of claim, wherein milling axis XPRAnd XLLUnanimously.
5. the device (10) according to aforementioned any one of claim, the wherein bar of the top (22) of rotary piercing machine (20)
(24) structurally it is connected to the plug (32) of longitudinal rolling mills (30).
6. device (10) according to claim 5, the wherein bar (24) of the top (22) of rotary piercing machine (20) and longitudinal direction
The plug (32) of milling train (30) is formed as a part.
7. device (10) according to claim 5, the wherein bar (24) of the top (22) of rotary piercing machine (20) and longitudinal direction
The plug (32) of milling train (30) is releasably coupled together.
8. the device (10) according to aforementioned any one of claim, wherein rotary piercing machine (20) is selected from barrel roll
Perforating machine and the perforating machine with tapered roller.
9. the device (10) according to aforementioned any one of claim, wherein longitudinal rolling mills (30) are selected from heat transfer station
The roll mill of platform and the roll mill with three-roll rolling platform.
10. the device (10) according to aforementioned any one of claim, further includes for taking out from semifinished tube (13)
Go out the striker fork (40) of plug (32).
11. methods for rolling seamless pipe, comprise the steps：
- solid billet (11) is provided；
- rotary piercing machine (20) is provided, the rotary piercing machine (20) limits milling axis XPRWith rolling direction and including two
Individual inclined shaft roll and the top (22) on bar (24)；
- longitudinal rolling mills (30) are provided, the longitudinal rolling mills (30) limit milling axis XLLWith rolling direction and including multiple tools
There is the rolling platform of scalable motor driven rolls, longitudinal rolling mills (30) are designed to the rolling perforation blank on plug (32)
(12)；
- solid billet (11) is supplied to rotary piercing machine (20)；
- complete perforated is carried out to billet (11) so as to obtain perforation blank (12) towards top (22), and
The axial thrust produced on bar (24) in-opposing perforation procedure；
- release is bonded on the perforation blank (12) on the bar of top (22) (24)；
- make perforation blank (12) that the plug (32) of longitudinal rolling mills (30) is moved to from the bar (24) of top (22)；
- perforation the blank (12) that will be engaged on plug (32) is supplied to longitudinal rolling mills (30)；
- perforation blank (12) is rolled on plug (32) so as to obtain semifinished tube (13)；
- plug (32) is kept so as to give plug (32) predetermined speed in the operation of rolling；And
- release semifinished tube (13),
Wherein rotary piercing machine (20) and longitudinal rolling mills (30) with identical rolling direction, and by single thrust/holding
The step of axial thrust that seat (36) is put up a resistance on bar (24) is with plug (32) are kept.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI2014001401 | 2014-07-31 | ||
| ITMI20141401 | 2014-07-31 | ||
| PCT/IB2015/055172 WO2016016750A1 (en) | 2014-07-31 | 2015-07-08 | Combined apparatus for rolling seamless tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106573282A true CN106573282A (en) | 2017-04-19 |
Family
ID=58518585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580041549.8A Pending CN106573282A (en) | 2014-07-31 | 2015-07-08 | Combined apparatus for rolling seamless tubes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20170173650A1 (en) |
| CN (1) | CN106573282A (en) |
| RU (1) | RU2017106032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116393515A (en) * | 2023-06-09 | 2023-07-07 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692069B (en) * | 2020-12-30 | 2022-09-16 | 浙江传播者金属装饰材料有限公司 | Rolling mill structure with core rod locking device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5466365A (en) * | 1977-11-08 | 1979-05-28 | Nippon Steel Corp | Piercing method for pipe material |
| JPS5695409A (en) * | 1979-12-29 | 1981-08-01 | Nippon Steel Corp | Rolling method for pipe |
| CN1055681A (en) * | 1991-04-13 | 1991-10-30 | 太原重型机械学院 | Hot rail three roller combined piercing for seamless pipe |
| JPH07314014A (en) * | 1994-05-25 | 1995-12-05 | Nippon Steel Corp | Equipment for rolling seamless steel tube and method thereof |
| CN101842170A (en) * | 2008-08-25 | 2010-09-22 | Sms米尔股份有限公司 | Method for producing a seamless steel pipe and rolling mill for performing the method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5011770B2 (en) * | 2006-03-22 | 2012-08-29 | 住友金属工業株式会社 | Method for producing martensitic stainless steel pipe |
| DE102013002268B4 (en) * | 2013-02-12 | 2018-04-05 | Sms Group Gmbh | Rolling plant or process |
-
2015
- 2015-07-08 CN CN201580041549.8A patent/CN106573282A/en active Pending
- 2015-07-08 US US15/403,601 patent/US20170173650A1/en not_active Abandoned
- 2015-07-08 RU RU2017106032A patent/RU2017106032A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5466365A (en) * | 1977-11-08 | 1979-05-28 | Nippon Steel Corp | Piercing method for pipe material |
| JPS5695409A (en) * | 1979-12-29 | 1981-08-01 | Nippon Steel Corp | Rolling method for pipe |
| CN1055681A (en) * | 1991-04-13 | 1991-10-30 | 太原重型机械学院 | Hot rail three roller combined piercing for seamless pipe |
| JPH07314014A (en) * | 1994-05-25 | 1995-12-05 | Nippon Steel Corp | Equipment for rolling seamless steel tube and method thereof |
| CN101842170A (en) * | 2008-08-25 | 2010-09-22 | Sms米尔股份有限公司 | Method for producing a seamless steel pipe and rolling mill for performing the method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116393515A (en) * | 2023-06-09 | 2023-07-07 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
| CN116393515B (en) * | 2023-06-09 | 2023-08-04 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
| US11911840B1 (en) | 2023-06-09 | 2024-02-27 | Taiyuan University Of Technology | Continuous rolling device and method continuous rolling device and method with interfacial temperature-force controllability for seamless metal cladding pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| US20170173650A1 (en) | 2017-06-22 |
| RU2017106032A3 (en) | 2018-12-14 |
| RU2017106032A (en) | 2018-08-28 |
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Application publication date: 20170419 |