CN107159713A - Hot rolled seamless steel tube skew rolling mill Foreground and Background plug supports rolling mill practice, equipment and technology entirely - Google Patents
Hot rolled seamless steel tube skew rolling mill Foreground and Background plug supports rolling mill practice, equipment and technology entirely Download PDFInfo
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- CN107159713A CN107159713A CN201710387429.4A CN201710387429A CN107159713A CN 107159713 A CN107159713 A CN 107159713A CN 201710387429 A CN201710387429 A CN 201710387429A CN 107159713 A CN107159713 A CN 107159713A
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- plug
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- rolling mill
- locating bar
- roller
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- 238000005096 rolling process Methods 0.000 title claims abstract description 157
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000003801 milling Methods 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 230000003019 stabilising effect Effects 0.000 claims description 38
- 238000005242 forging Methods 0.000 claims description 37
- 230000007246 mechanism Effects 0.000 claims description 22
- 238000005304 joining Methods 0.000 claims description 9
- 238000005098 hot rolling Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 17
- 238000003825 pressing Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 210000000867 larynx Anatomy 0.000 description 6
- 239000000463 material Substances 0.000 description 5
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- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
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- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Belong to metal-pressed machine (steel rolling) technical field the present invention be directed to the steel rolling process of seamless steel pipe skew rolling mill rolling deformation, with major tuneup rolling deformation technique, improve deformation stability, solve the biggest problem in oblique milling seamless steel tube production technique, i.e.,：For the purpose of steel pipe internal-surface spiral channel mass defect, raising quality, the rolling mill practice method and apparatus technology of proposition.Core element is skew rolling mill Foreground and Background plug using rolling mill practice, the equipment and technology supported entirely.Plug will be rolled in oblique milling rolling deformation in the operation of rolling from inlet of rolling mill and the port of export spacing clamping simultaneously, plug is completely in controlled restrained condition in the operation of rolling, at utmost reduces plug radial displacement during oblique milling.Coordinate Treatment On Cross Roller Design and frame new structural design to reach and improve the stable effect of rolling, eliminate or reduce oblique milling inner surface spiral channel to greatest extent, improve tube product quality.Seamless steel pipe oblique roll process level is improved, the application and development of oblique roll process is promoted.
Description
Technical field
The present invention is to belong to metal-pressed machine (steel rolling) technical field.For manufacturing seamless steel pipe, using plug
The steel tube with cross-rolling machine (including two rollers, three-roll cross rolling mill and roll-type rotation pipe expander) of rolling mode, to improve steel pipe rolling deformation
Stability, so as to improve the solution for the purpose of skew rolling mill seamless steel pipe product quality comprehensively.
Background technology
Forming mode is exactly hot rolling mode in addition to hot extrusion in seamless steel pipe hot-working.Hot rolled seamless steel tube can divide axial rolling again
With oblique milling.Axial rolling refers to that the metal of deformation processing mainly flows along rolling direction, and milling train outlet metal works make straight ahead, and
The rolled piece metal outlet of oblique milling is moved into spiral way.
Compared with axial rolling, oblique milling is simple due to process equipment, changes product specification fast, flexibly, is particularly suitable for use in small quantities of
Amount, multi items and high-alloy steel (including stainless steel) production.With respect to axial rolling unit (such as tandem mill), oblique milling production cost is low near
20% is also a main advantage.Existing seamless steel pipe skew rolling mill is mainly：Roll-type Mannesmann piercing mill (arrange by two roller vertical rollses
Or Horizontal weld type arrangement punch, three high cross piercing machine)；Skew rolling mill (abbreviation skew rolling mill) class, such as：Traditional
Diescher milling trains (Diesel's milling train), three roller Assel pipe mills (Assel) milling trains and accurate skew rolling mill (Accu
Roll)。
Compared with axial rolling, existing skew rolling mill is raw due to feature of oblique milling deformation itself and existing process technology, device structure
There is obvious inferior position compared with axial rolling in production seamless steel pipe quality, be mainly manifested in steel pipe internal-surface formation spiral channel, spiral shell after deformation
Revolve road discrepancy in elevation depth general in 0.2mm or so, this just substantially constrains the seamless steel tube production that skew rolling mill produces high-quality requirement
With the production of some kinds, although the investment compared with equal production volume axial rolling unit of oblique milling unit is low by more than 60%, also limit
Further it is widely popularized and develops.
Present inventor always works on seamless steel tube production, have extensively studied oblique milling Deformation Theory and in the oblique milling of actual production
Produce reality experience is have accumulated on machine.Analyze skew rolling mill production inside spin road mechanism and various factors, it is proposed that improve comprehensively
The system solution of oblique milling deformation process stability.The present invention is exactly an improvement project wherein in oblique roll process mode.
Existing skew rolling mill, as the plug of main inside warp tool, no matter (the floating type, semifloating of the plug method of operation
With retained mandrel), plug is in relative free state in rolling in deformation pass, only provides necessary by inlet of rolling mill platform
Limit method, therefore plug still can be considered that front end is hinged, plug is in hanging free state in pass.Due to rolling roll contour design,
Pass adjustment and roll spring etc. are multifactor, cause as-rolled condition in deformed area pass extremely unstable, do not form theoretical hope
Deformation space stable state is constituted by roller shape and plug, so as to directly result in the obvious ripple of as-rolled condition during rolling deformation
It is dynamic.The unstable of as-rolled condition is the principal element to form inner surface into spiral channel.
In skew rolling mill, now commonly used retained mandrel technique is on skew rolling mill foreground, using mechanically or hydraulically
Restraint device applies the resistance of certain value to plug, makes plug to the movement velocity after elongator, is driven less than roll for stretching machine
Hollow hollow billet realized to movement velocity after elongator restraint roll.
Because roll is along rolling centerline, in the horizontal plane with rolling in vertical plane with rolling centerline at an angle
Center line processed is also at an angle.Therefore in this rolling mode, hollow billet has rotary motion and linear motion with plug.
Because the wall thickness of steel pipe is mainly what is determined in skew rolling mill rolling, after the deformation space (pass) of roll forming of the roll formation is determined,
The degree of stability of inter-working position between its in-house tool plug and roll, just determines thickness of steel pipe precision.Therefore, steel pipe
The precision of wall thickness had both been decided by real work position of the roll relative to rolling centerline, was also dependent upon plug center relative to rolling
The physical location and stable state of center line processed.And steel pipe internal-surface rolling is the roll off between mandrel surface and metal, therefore
Mandrel process state directly affects inner surface quality.
After existing oblique milling class pass larynx footpath point (the equal wall starting point of shoulder, Accu Roll of the roll of such as roller trio skew rolling),
Hollow forging and the plug motion shut out, is spiral, its appearance is the free whipping of the unconfinement of hollow forging and plug, essence
It is exactly mandrel process state labile.Because the support to plug is entered simply by the support section of plug rear end on elongator foreground
OK, this unstable whipping is with the increase of waste length of tube and the movement of plug, and its whipping amount is bigger, therefore, this shakiness directly perceived
Fixed whipping causes the key factor of the decline of steel pipe internal-surface mass defect and precision in forming process.
The core of its solution is exactly the stability of comprehensive raising skew rolling mill rolling deformation technique.
The content of the invention
The present invention aiming at the rolling stability improved in oblique milling deformation process propose critical process improve and
Corollary equipment technology, that is, hot rolled seamless steel tube skew rolling mill Foreground and Background plug support rolling mill practice, equipment and technology, main points entirely
Be in oblique milling rolling deformation by existing plug in the operation of rolling from inlet of rolling mill and the port of export be simultaneously spacing, clamping, formed
In milling train Foreground and Background plug, two ends are simultaneously fixed end to end, limited support, at utmost reduce plug radial displacement during oblique milling
With hollow forging whipping.Coordinate Treatment On Cross Roller Design and frame new structure to reach and improve the stable effect of rolling, eliminate or maximum limit
Degree reduction oblique milling inner surface spiral channel, improves tube product quality.
The present invention be directed to plug (or similar tube rolling in-house tool) rolled steel is used in all steel tube with cross-rolling extension process
The milling train of pipe.
For existing skew rolling mill roll in backstage plug, the unstable radial displacement of hollow forging, whipping is big the problem of,
Backstage sets a plug locating bar (8) to be constrained again come the plug (1) stretched out to plug outside the point of rolling groove larynx footpath, forms core
Rod in the operation of rolling allround fastness with it is spacing.Constraint due to plug locating bar (8) to plug (1), effectively improves plug and exists
Stability in rolling, at utmost limits plug radial displacement and whipping.
The feature of the present invention：On Cross-rolling elongation machine host (2) backstage, the core that a length is walked the wire slightly above backstage is provided with
Rod locating bar (8).In restraint rolling, plug locating bar (8) and plug (1) are subjected to on-line joining process, make plug in rolling
As with having support section in the rear and front end of plug active section, Duan Junke is supported forward and backward this to carry out spacing clamping branch
Support.Have in the same apparatus by backstage again, can simultaneously take into account and constraint, the difunctional stabilization of support are all played to hollow forging and plug
Device (4) to carry out plug the support rolling after elongator, so that form a kind of brand-new front and back plug supports rolling entirely
Technique.See Fig. 1-Fig. 3.
A significant design to rolling plug in invention, is the head end shape for changing plug, and newly-increased is devised
Plug locating bar.By in the operation of rolling, on-line joining process being carried out between plug locating bar and plug, making the two in the operation of rolling
In turn into entirety, to milling train backstage length range, plug is provided with rolling equivalent to by the extension of plug
The ability of constraint is supported at the forward and backward two ends of plug active section.I.e. plug active section uses normal in elongator foreground partition to be existing
Rule are supported；Plug active section is provided a supporting role in elongator back partition by plug locating bar.And pass through backstage relevant device
Positioning and position-limiting action to plug locating bar, to ensure after combining the rolling stability of " long plug ".Constitute therefrom forward and backward
Platform plug supports rolling mill practice entirely.
The fast of plug (1) and plug locating bar (8) can be carried out in allegro rolling to reach this purpose, and accomplishing
Speed, accurate, positive engagement, and energy transmitting rotary power, in plug (1), header terminal design has a soldered tooth (37), the tooth of the gear
Shape is designed by barreled tooth flank.And in barreled tooth flank front end, the cydariform curve of tooth form is extended into certain distance naturally, form insertion and be oriented to
Section.The diameter of plug locating bar (8) supports that section is close with plug, inside head end, is designed with a ring gear (42), is connect to improve
Precision is closed, ring gear (42) is increased by the tooth length of plug locating bar head end side, form ring gear joining section, and increase
Tooth be every a tooth carry out, so as to form the very big backlash of ring gear joining section.When working engagement, plug head end
The ring gear (42) of soldered tooth (37) and plug locating bar constitutes the working method of a gear coupling, to transmit rotary motion.
Plug locating bar (8) moves back dolly (9) supporting by being placed in the concentric resistance of backstage rear end and rolling centerline, and by the resistance
Move back dolly bear by plug locating bar transmit Lai power and motion.And it is the high-speed chain by being arranged at lower section that dolly (9) is moved back in resistance
(10) it is driven to move back and forth, and certain resistance in rolling for the inverse rolling direction of plug locating bar (8) offer.To keep core
The rotary speed of rod (1), and to prevent plug locating bar (8) from beating excessive because of rotation in rolling, have on backstage driving and
Positioner, the device is respectively arranged with a set of plug locating bar rotating roller (7) and pressing roll mechanism (6).The mechanism is at totally two.
In rolling, plug locating bar rotating roller keep rotation, and by the friction between plug locating bar (8) realize plug locating bar with
Synchronization between plug.
Plug locating bar (8) relative to the positioning of rolling centerline, be by Aided design of the present invention it is special it is difunctional surely
Determine stabilising arrangement (3) in device (4) and four-roller machine, realize the clamping to plug locating bar.In rolling, plug locating bar passes through it
The ring gear (42) of head end realizes that rotating speed is transmitted with the drum-shaped tooth type external gear (37) of plug head end, and positions caput by plug
The inner conical surface at end is contacted with the male cone (strobilus masculinus) of plug head end, is realized and is combined with one heart.During the entire process of rolling, plug locating bar
(8) promoted by plug (1), dolly (9) is moved back by resistance the adhesion of the two is provided, plug locating bar and plug was rolled entirely
Turn into an entirety in journey.In rolling, with the extension and advance of rolling hollow forging, difunctional stabilising arrangement (4) opens it by frame
Clamping device is to embracing a hollow forging state, and advance to hollow forging and rotation are oriented to.At the end of the restraint state of the operation of rolling,
Rise hauling-out roller (11) and hold hollow forging and plug locating bar, plug locating bar (8) moves back dolly (9) together with resistance and driven by high-speed chain,
At a high speed along rolling direction motion, and plug locating bar head end is pulled to walk the wire it is outer, while plug is by foreground stopper mechanism (14)
Inverse rolling direction, which drives, backs out extended mainframe to its starting point.Again from star material stirring-up mechanism (5) by hollow forging to parallel to roll line
Difunctional stabilising arrangement (4) is routed up in direction, and hollow forging rolls to rollgang (12) via oblique grid section (13), then by rollgang by its
Lower process is sent to, and completes whole extension rolling.
In the present invention, backstage capital equipment is difunctional stabilising arrangement (4).The mechanism is three swing arms of Driven by Hydraulic Cylinder
(15,16,21) structure.In each swing arm, it is provided with and embraces roller (17) and axis tile (20).Roller is embraced to be fixedly mounted in swing arm,
And axis tile is then to carry out straight reciprocating motion by slim hydraulic cylinder (18) driving positioned at axis tile both sides, and by bending in axis tile body
The muscle at shape back side contact between swing arm, to determine axis tile relative to an armful roller retracted position.By axis tile with being fixedly mounted on swing arm
On alignment pin (19) contact, come determine axis tile relative to embrace a roller extended position.
At work, difunctional stabilising arrangement (4) has three functional locations.It can realize in the same apparatus, it is straight to difference
The hollow forging and plug locating bar in footpath are oriented to and supporting role.
Functional location one is full open position.The location status applies to the not yet entrance of plug locating bar and walks the wire and rout up
The hollow forging period.In a state, upper swing arm is located at axis tile retracted mode in uppermost position, upper swing arm, axis tile face is being embraced roller
Face rear.Axis tile in another two swing arm stretches out state, protrudes from axis tile face and embraces roll surface, and hollow forging can be supported, be oriented to.
Functional location two is to stablize plug locating bar position.The location status applies to the entrance of plug locating bar and walked the wire,
And enter pass period, and the overall process that restraint is rolled in wait hollow billet.In a state, upper swing arm (21) is by hydraulic cylinder
(24) when being first operated alone to a position, sliding block (34) and upper swing arm pull bar are passed through on closing direction justifying to plug locating bar
(35) realize and unidirectionally contact with other two swing arms (15,16), then by hydraulic cylinder (22) by three swing arms of pull bar drive (15,16,
21) while pushing down plug locating bar (8).When swinging arm starts, the slim hydraulic cylinder piston rod retraction in each swing arm,
Drive axis tile (20) mobile, axis tile face is stepped back in an armful roll surface certain value, and the muscle eventually through the axis tile arch back side and each pendulum
Arm contact and be tightened up, reach and eliminate gap and firm purpose.Now, the roller (17) of embracing in each swing arm pushes down plug positioning
Rod, and being acted on by overflow valve and hydraulic control one-way valve in hydraulic control system etc., plug locating bar is produced it is a kind of " pressure without
State tightly ", enables plug locating bar to rotate freely, but can not beat or whipping, reaches the purpose of stable plug locating bar.
Under the state, the axis tile installed in each swing arm does not contact hollow forging.
Functional location three is that hollow forging is oriented to position.The location status applies to the hollow forging period of elongator rolling.In the shape
In state, three swing arms (15,16,21) of each difunctional stabilising arrangement treat hollow forging head end away from this under the instruction of control system
During difunctional stabilising arrangement certain distance, by hydraulic cylinder (22) by drag link mechanism, by three swing arms simultaneously to amplification pass side
To open certain distance, make three embrace roller groups into pass diameter certain value bigger than waste pipe diameter.Meanwhile, it is fixedly mounted on each pendulum
Slim hydraulic cylinder piston rod on arm stretches out, and drives axis tile movement, makes axis tile face higher than embracing a roll surface certain value, and most axis tile at last
Withstand in the alignment pin being fixedly mounted in each swing arm, reach and eliminate gap and firm purpose.Now upper axis tile curved surface with
Certain distance is kept between waste pipe surface, the distance is adjusted when assembling difunctional stabilising arrangement under production line.And another two
Axis tile curved surface in swing arm is in contact condition with waste pipe surface, and the contact condition is also that difunctional stabilization is assembled under production line
Adjusted during device.Three axis tile curved surfaces collectively form the guiding and stable support function to hollow forging.
Plug head end is realized and connect online by increasing plug locating bar on backstage by the present invention therewith before roll on-load
Close, so that forming plug participates in the active section deformed positioned at centre, two can enter the full mill length plug of row constraint, and lead to
Later stabilising arrangement, difunctional stabilising arrangement, rotating roller and pressure roller, resistance move back dolly collective effect in the newly-designed four-roller machine of platform,
Realize that the Foreground and Background plug in rolling overall process supports rolling mill practice entirely.The technique can be such that plug locates in the overall process of rolling
In default operating position, that is, improve mandrel rolling stability.And lack to improving hollow forging wall thickness accuracy and reducing inner surface quality
Fall into and acted on there is provided very big.
Brief description of the drawings
The front and back plug that Fig. 1 is the present invention supports rolling mill practice background devices to arrange elevation entirely.
The front and back plug that Fig. 2 is the present invention supports rolling mill practice background devices to arrange elevation 1-1 parts entirely.
The front and back plug that Fig. 3 is the present invention supports rolling mill practice background devices to arrange elevation 1-2 parts entirely.
The front and back plug that Fig. 4 is the present invention supports rolling mill practice background devices to arrange elevation 1-3 parts entirely.
The front and back plug that Fig. 5 is the present invention supports rolling mill practice background devices floor plan entirely.
The front and back plug that Fig. 6 is the present invention supports rolling mill practice background devices floor plan 2-1 parts entirely.
The front and back plug that Fig. 7 is the present invention supports rolling mill practice background devices floor plan 2-2 parts entirely.
The front and back plug that Fig. 8 is the present invention supports rolling mill practice background devices floor plan 2-3 parts entirely.
Fig. 9 is that the front and back plug of the present invention supports the location diagram of rolling mill practice plug and plug locating bar entirely
The front and back plug that Figure 10 is the present invention supports rolling mill practice plug and plug locating bar entirely.
The front and back plug that Figure 11 is the present invention supports rolling mill practice plug and plug locating bar engagement figure entirely.
The front and back plug that Figure 12 is the present invention supports rolling mill practice A-A sections entirely.
The front and back plug that Figure 13 is the present invention supports the difunctional stabilising arrangement functional location two of rolling mill practice entirely --- and it is steady
Determine plug locating bar position.
The front and back plug that Figure 14 is the present invention supports the difunctional stabilising arrangement functional location three of rolling mill practice entirely --- and it is waste
Pipe is oriented to position.
The front and back plug that Figure 15 is the present invention supports the difunctional stabilising arrangement functional location one of rolling mill practice entirely --- and it is waste
Pipe routs up position.
The front and back plug that Figure 16 is the present invention supports the difunctional unidirectional wide-angle of stabilising arrangement upper swing arm of rolling mill practice entirely
Unclosing structure.
The front and back plug that Figure 17 is the present invention supports the difunctional stabilising arrangement swing arm assembling three-view diagram of rolling mill practice entirely.
The front and back plug that Figure 18 is the present invention supports the difunctional stabilising arrangement B-B of rolling mill practice and C-C section views entirely.
The front and back plug that Figure 19 is the present invention supports stabilising arrangement in rolling mill practice four-roller machine entirely.
In figure, 1 is plug, and 2 be extension machine host, and 3 be stabilising arrangement in four-roller machine, and 4 be difunctional stabilising arrangement, and 5 are
Star material stirring-up mechanism, 6 be pressing roll mechanism, and 7 be rotating roller, and 8 be plug locating bar, and 9 be that dolly is moved back in resistance, and 10 be high-speed chain, and 11 are
Roller is hauled out, 12 be rollgang, and 13 be oblique grid section, and 14 be foreground stopper mechanism, and 15 be swing arm, and 16 be swing arm, and 17 be an armful roller, 18
It is alignment pin for slim hydraulic cylinder, 19,20 be axis tile, and 21 be upper swing arm, and 22 be hydraulic cylinder, and 23 be support, and 24 be hydraulic cylinder,
25 be roller, and 26 be frame flap seat, and 27 be hydraulic cylinder, and 28 be arm, and 29 be hydraulic cylinder, and 30 be four-roller stabilising arrangement frame, 31
It is that arm hangs shafting for gear, 32,33 be rack, and 34 be sliding block, and 35 be upper swing arm pull bar, and 36 be engagement for de- pipe fork, 37
Tooth, 38 be external gear, and 39 be active section, and 40 is support section, and 41 be that plug locating bar supports section, and 42 be ring gear.
Embodiment
Using foreground restraint mode.Plug still works on foreground for traditional approach, i.e., by foreground stopper mechanism (14) to core
Rod (1) applies restraint power, and the stable plug together with roll larynx footpath.
Plug (1) in the present invention, using three stage structure, i.e. joining section, active section (39), supports section (40).To gold
It is active section (39) that category, which has deformed directly act on,.The section presses retained speed, is designed to relatively short one section of length, can be significantly
Reduction instrument manufacturing cost, the head end of plug active section (39), is designed to the conical surface of a fixed angle, with plug locating bar
Certralizing ability from during engagement.And support that the steel pipe that section (40) is common material is manufactured, price is low.Joining section is external gear shaft part,
There is the soldered tooth (37) of an external tooth wheel construction shaft part front end, and the tooth form of soldered tooth (37) is designed by barreled tooth flank, and in barreled tooth flank
Front end, certain distance is extended by the cydariform curve of tooth form naturally, forms insertion guide section.Whole external gear shaft part by screw thread with
Plug active section head end is connected.
Plug locating bar (8) in the present invention, is brand-new design.Support to install inside section (41) head end in plug locating bar
There is a ring gear (42), ring gear (42) is increased by the tooth length of plug locating bar head end side, forms ring gear joining section,
And the tooth increased is carried out every a tooth, so that the very big backlash of ring gear joining section is formed, in plug insertion process,
It is aided with the rotation of plug locating bar, making the soldered tooth (37) of plug head end can smoothly enter in ring gear (42), and and internal tooth
Circle is engaged, and is rotated one entirety of plug and the formation of plug locating bar.It is same to set in the tail end of plug locating bar
There is an external gear (38), the external gear is attached for plug locating bar and resistance to be moved back into dolly (9), transmits rotary motion.
After roll pass is along rolling direction away from pass larynx footpath most nearby, it is designed with stabilising arrangement (3) in a four-roller machine.
The device is that plug locating bar (8) offer and the axiality and stable plug locating bar of pass center line play a crucial role.And adopt
Have using four roller modes to clamp, location mandril locating bar, can plug locating bar at a high speed rotate and bear plug insertion when rush
Preferable effect is obtained in terms of hitting power.Therefore, in the four-roller machine stabilising arrangement to employ closed closed-in construction steady to constitute four-roller
Determine device frame (30), the frame bears the impulsive force that plug (1) insert band is come, and plug locating bar (8) rotary motion band
The impulsive force come.And by the frame, these impulsive forces are all delivered to elongator mainframe (2).Four rollers (25)
Rotated using rolling bearing, be divided to two groups in arranging up and down, every group is two rollers and is arranged in a frame flap seat (26).It is same
Two roller centers outer online can be adjusted by the predetermined plug locating bar diameter to be clamped in group, make four roller difference positions
In plug locating bar section, horizontal by about 45 ° of arranged crosswise positions.Whole flap seat (26) is by the hole that is constituted positioned at four-roller
The arm (28) of type center line both sides is hung in frame.Every group of flap seat (26) has four arms (28) to constitute parallel four side
Shape mechanism.The swing of every group of flap seat, is to pass through gear (31) rack (33) transmission drive arm by respective hydraulic cylinder (29)
(28) realize.Rocking caused by the vibration that withstands shocks is to four-roller is eliminated to reach, and keeps four-roller to rolling centerline
Axiality, in arm suspension shafting (32), be also equipped with four hydraulic cylinders (27).When arm (28) is swung, this four
Hydraulic cylinder (27) is retractable state, and when four-roller is in clamping plug locating bar position, four hydraulic cylinders (27) are
Locking state, by retract piston bar, flap seat is tensed, and eliminates flap seat to gap everywhere between arm suspension shafting (32).
For the effectively stable plug during whole restraint, reduce whipping of the plug head end after pass.It is long by 18.5 meters
Hollow forging, there is provided 19 meters are walked the wire, and interval herein, be divided to two sections be disposed with the difunctional stabilising arrangement of 8 framves (4).It is difunctional
Stabilising arrangement has three swing arms (15,16,21) to be fixedly mounted on support (23), in each swing arm, is provided with and embraces roller (17)
With axis tile (20).Roller is embraced to be fixedly mounted in swing arm, and axis tile is driven by the slim hydraulic cylinder (18) positioned at axis tile both sides
It is dynamic to carry out straight reciprocating motion, and by muscle contact between swing arm at the arch back side in axis tile body, come determine axis tile relative to
Embrace roller retracted position.Contacted by axis tile with the alignment pin (19) being fixedly mounted in swing arm, to determine axis tile relative to an armful roller
Extended position.Upper swing arm (21) can lean on the driving of hydraulic cylinder (24) individually carry out wide-angle opening (relative to three roller groups into
The center of circle), it is attached between each swing arm by pull bar, and be to be sleeved on a sliding block slided along pull bar to upper swing arm pull bar (35)
(34) on, make upper swing arm (21) only to relative to three roller groups into the center of circle close up direction be limited.The difunctional stabilising arrangement (4)
Three kinds of position functional location is oriented to full open position, stable plug locating bar position, hollow forging.By three swing arms of programme-control and respectively
Slim hydraulic cylinder (18) in swing arm, in the whole operation of rolling, carries out the combination of actions of swing arm and axis tile, to realize above-mentioned three
Plant function,
Not hinder the rotation of plug, there is provided plug locating bar rotating roller (7), and to prevent plug locating bar in rotation
During will not jump out of rotation roll surface, be additionally provided with pressing roll mechanism (6).The roller axis of rotating roller (7) are in rolling centerline
Certain angle arranged crosswise, provides rotary power, and comply with its round linear motion for plug locating bar.The height of rotating roller (7)
Degree is can be adjusted according to plug locating bar (8) specification, and can be lifted in good time, straight between hollow forging and plug locating bar to adapt to
Footpath is poor.The rotation of rotating roller is realized by motor, and itself and foreground plug identical rotary speed are provided by motor.In core
In the insertion engaging process of rod and in the operation of rolling of hollow billet, rotating roller (7) is maintained and foreground plug identical rotating speed, passes through core
Friction between rod locating bar and rotation roll surface, realizes the synchronization between plug locating bar and plug.Turn in plug locating bar
When speed is less than plug, rotating speed supplement is provided by rotating roller, when plug locating bar rotating speed is higher than plug, plug locating bar and rotation
Slip is produced between roll surface and realizes reduction of speed.And the roller of pressing roll mechanism (6) is driven by hydraulic cylinder to rotate freely roller and carries out the upper bottom
It is dynamic, at work by pressure when its swing angle of hydraulic control and pressure plug locating bar, so as to be produced to plug locating bar
The state of " press without tight ", does not produce not big thrust to plug locating bar, is practically at a kind of with minimum thrust
" light " contact mode.Plug locating bar rotating roller (7) and pressing roll mechanism (6), two sets are provided with backstage, are that plug locating bar exists
Rotating speed as prolonged as possible is provided in rolling to maintain.
For that plug locating bar can be used to remain positive engagement with plug during rolling, and terminate in rolling
When can quickly move hollow forging and go out roll line.One is designed with backstage the resistance of inverse rolling direction is provided for plug locating bar, and can be
Plug locating bar provides and moves back dolly (9) along the resistance of roll line back and forth movement.The resistance, which is moved back, is provided with rolling bearing in dolly, to adapt to
The rotation of plug locating bar, and bear its power brought.Resistance is moved back dolly and is installed on chain bed (10), passes through chain link and lower section
High-speed chain is connected, and high-speed chain is driven by motor.Before the rolling with rolling at the end of, by motor by high-speed chain drive resistance move back dolly
High-speed motion, so that plug locating bar is realized quickly (fast forwards through position to be joined or fast fallback outer to walking the wire in place
Start bit).In the operation of rolling, apply an appropriate moment of resistance to high-speed chain by motor, and dolly (9) is moved back to core by resistance
Rod locating bar (8) produces the resistance of inverse rolling direction, plug locating bar is withstood plug all the time in the operation of rolling, realizes plug
The engagement of locating bar and plug, so as to constitute a long plug, and serves as the elongator back-office support section of plug.
After rolling terminates, roller (11) will be dragged out by star material stirring-up mechanism (5) and move the famine that de- pipe of walking the wire pitches (36) to
Guan Xiangyu rolling centerlines are parallel laterally to be routed up, and second of rolling is carried out to vacate rolling centerline.The hollow forging routed up is through oblique
Grid section (13) is rolled on rollgang (12), and is sent to next unit.
Front and back plug supports the rolling process to be entirely：
The preposition stage --- the hollow billet of insertion plug is ploughed under roll line, and plug tail end is placed in into limiting bogie bracket
In；Foreground limiting bogie is located at dolly start of a run position；The arm (28) of stabilising arrangement (3) is put to highest order in four-roller machine；It is double
Function-stable device (4) is in full opening function position；Haul out roller (11) and rise to stooling rod locating bar position；Rotating roller (7) roll surface
Highly in supporting plug locating bar position；Pressing roll mechanism (6) swings to highest order in pressure roller；Plug locating bar (8) is installed on
Resistance is moved back in dolly (9), and outer start bit of walking the wire in backstage.
Plug zygophase --- limiting bogie advances, and catches plug tail end, drives plug to enter by the motor in dolly
Row pre-rotation, withstands plug by trolley and advances, while foreground tiltedly send roller to rise and drives hollow billet to rotate and advance；Plug is determined
Position rod (8) moves back dolly (9) by resistance and drives the predetermined point advanced at utmost speed near by pass larynx footpath point；Rotating roller (7) is with foreground core
Rod rotary speed rotates；Pressing roll mechanism (6) after its installation site certain distance, is driven in plug locating bar head end by hydraulic cylinder
Under dynamic pressure, with " pressure is without tight mode " constraint plug locating bar；Stabilising arrangement (3) reaches predetermined in plug locating bar in four-roller machine
During position, four-roller is quickly closed up by hydraulic cylinder, plug locating bar is clamped, and keeps its axiality with rolling centerline；Drag
Go out roller (11) and minimize position；Difunctional stabilising arrangement (4) is closed up to stablizing plug locating bar functional location；By limiting bogie band
When dynamic plug advances to the position of setting, the external tooth type soldered tooth (37) of plug head end starts with plug locating bar head end
Taper hole is oriented to, and is inserted in the ring gear (42) in plug locating bar head end,.Caput is positioned to plug head end male cone (strobilus masculinus) and plug
Untill holding inner conical surface contact, the online combination of whole plug is completed.Now hollow billet pace lags behind plug, its hollow billet head end
Also it is introduced into pass.
Restraint rolling sequence --- after hollow billet head end is bitten pass, it is delayed, is reached in hollow forging head end through certain time
In four-roller machine before stabilising arrangement flap seat (26), armful hollow forging position of setting is quickly opened to by hydraulic cylinder drive arm, during the position
The diameter of a circle of four-roller composition is slightly larger than hollow forging；After, reach the previous spacing of every difunctional stabilising arrangement of frame (4) in hollow forging head end
From the difunctional stabilising arrangement of this (4) is opened to hollow forging guide function position, and the difunctional stabilising arrangement of other framves is remained at
Stable plug locating bar functional location, i.e., difunctional stabilising arrangement (4) is to open successively；In hollow forging head end away from rotating roller and pressure roller
Before mechanism during certain position, the pressing roll mechanism is opened, and pressure roller is put to highest order, and rotating roller reduction certain value, to lowest order；
Dolly and its institute's cored bar locating bar are moved back in resistance, are promoted by plug, plug locating bar is retreated with the edge roll line of one side rotation one
Mode move, and by moving back the moment of resistance for the high-speed chain motor offer that dolly is connected with resistance, plug locating bar is pushed up all the time
Firmly plug.
Move back rod and discharging stage --- pass through the roll larynx footpath point moment in hollow billet tail end, instruction, four are sent by control system
The arm (28) of stabilising arrangement is quickly opened to dominant bit in roller machine, makes four-roller away from waste pipe surface；Difunctional stabilising arrangement (4)
It is completely in full opening function position；Remainder is not switched on to the pressure roller of highest order opening to dominant bit；Roller is hauled out simultaneously rises to support
Hollow forging position simultaneously conveys hollow forging along rolling direction；Plug locating bar moves back dolly (9) by resistance and driven at a high speed along rolling side by high-speed chain
To pumping, and finally leave plug locating bar head end to walk the wire, and hollow forging head end after de- pipe fork (36) positioning by not readvancing.
When dolly is moved back in resistance retreats to the dolly start bit of backstage rearmost end, the star-wheel in star material stirring-up mechanism (5) starts 120 ° of rotation, will
The hollow hollow forging for completing to move back rod is routed up on oblique grid section (13) to parallel to roll line direction, and hollow forging is freely rolled to conveying roller again
On road (12) and seen off.
Diagram in the present invention is led according to the use foreground restraint mode, band that a kind of production tube specification is φ 102-273
The embodiment of disc type two-roller skew-rolling milling train (novel steel tube precision skew rolling mill Accu Roll) is illustrated and described.To one
The skew rolling mill using mandrel rolling is cut, such as：Two roller Diescher (Diesel's pipe mill), Accu Roll, oblique milling rotation are expanded
All roll-type skew rolling mill classes such as pipe machine are applicable.
Claims (5)
1. seamless steel pipe hot-rolling oblique milling production Technology (including Mannesmann piercing mill, secondary extension skew rolling mill), using before milling train,
Backstage plug supports clamping positioning process and equipment and technology entirely.
2. skew rolling mill backstage uses plug locating bar, with plug on-line joining process and as an entirety in restraint rolling, pass through
The stabilising arrangement on backstage, is positioned to plug locating bar and stablizes support, is realized on skew rolling mill backstage and foreground, to rolled steel
Front and rear, the platform plug that the plug active section of pipe enters wardrobe, be supported at tail two support rolling mill practice entirely.
3. in the rolling mill practice as described in claim 2, using the plug locating bar (8) with internal messing gear ring in head end.
4. in the process equipment as described in claim 2, using with same mechanism, realization is determined plug locating bar
Position and difunctional stabilising arrangement (4) that is stable and being oriented to the hollow forging in the rolling outside plug locating bar.
5. in the process equipment as described in claim 2, installed in skew rolling mill, it is same using rack pinion, hydraulic cylinder
Axle is installed and has stabilising arrangement (3) in the four-roller machine of locking function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387429.4A CN107159713B (en) | 2017-05-27 | 2017-05-27 | The equipment that hot rolled seamless steel tube skew rolling mill Foreground and Background plug supports rolling entirely |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387429.4A CN107159713B (en) | 2017-05-27 | 2017-05-27 | The equipment that hot rolled seamless steel tube skew rolling mill Foreground and Background plug supports rolling entirely |
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| CN107159713B CN107159713B (en) | 2019-08-02 |
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| CN109092899A (en) * | 2018-06-11 | 2018-12-28 | 太原科技大学 | A kind of ejector sleeve rolling device of high-performance magnesium-alloy seamless tubular goods |
| CN110860560A (en) * | 2019-12-17 | 2020-03-06 | 鑫鹏源智能装备集团有限公司 | High-precision hollow billet rolling equipment and method by using puncher |
| CN112828054A (en) * | 2020-12-28 | 2021-05-25 | 太原重工股份有限公司 | Front support device of continuous rolling mill |
| CN116833237A (en) * | 2023-09-01 | 2023-10-03 | 太原科技大学 | Three-roller rotary rolling production line of thin-wall metal tube blank difficult to deform |
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| CN116833237B (en) * | 2023-09-01 | 2023-10-31 | 太原科技大学 | Three-roller rotary rolling production line of thin-wall metal tube blank difficult to deform |
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