CN105057478B - The method producing Varying-thickness variable diameters steel pipe - Google Patents
The method producing Varying-thickness variable diameters steel pipe Download PDFInfo
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- CN105057478B CN105057478B CN201510411730.5A CN201510411730A CN105057478B CN 105057478 B CN105057478 B CN 105057478B CN 201510411730 A CN201510411730 A CN 201510411730A CN 105057478 B CN105057478 B CN 105057478B
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Abstract
The invention discloses a kind of method producing Varying-thickness variable diameters steel pipe, including by mother tube feed end by unidirectional for mother tube fixation, ejector apparatus pushing and withstanding mother tube carries out pre- expanding to mother tube outfan, by mother tube feed end and outfan by mother tube twin fixed guide-vane, overall expanding four steps are carried out by ejector apparatus and draw-off gear to mother tube.The present invention realizes not only significantly changing thickness of steel pipe but also to the thickness of steel pipe precise control after expanding, and the heavy caliber seamless steel pipe produced has good mechanical property and preferably presentation quality.
Description
Technical field
The present invention relates to heavy caliber seamless steel pipe production technical field is and in particular to a kind of produce Varying-thickness variable diameters steel pipe
Method.
Background technology
Seamless steel pipe, is conventional fluid-transporting tubing.Compared with solid round steel, when bending resistance torsional strength is identical, its
Manufacture material is less, lighter in weight, be easy to machine-shaping, is widely used in manufacturing structural member and machine components.Seamless steel pipe
Production is mainly included on perforating machine and to gradually form cavity inside pipe pipe in the presence of roll and top and make hollow thickness
Hollow billet is rolled into the rolling process of the hollow forging close to finished product wall thickness on automatic rolling machine by the perforation process of wall hollow billet, through fixed
What footpath machine sizing made required production tube determines tube reducing operation；Due to diameter greater than 400mm heavy caliber seamless steel pipe with respect to
Common seamless steel pipe diameter specifications are excessive, are limited to the manufacturing capacity of existing conventional common seamless steel pipe production, big mouth
Footpath seamless steel pipe cannot be produced using conventional Plug pipe mill plant or mandrel rolling mill group, can only adopt expanding producer
Method is produced.
Conventional expanding production method has the expanding production method of oblique rolling extension diameter production method, drawing, the expanding producer of pushing and withstanding
Method.
Wherein, oblique rolling extension diameter production method, also referred to as rotates expanding technology, is to intersect be obliquely installed two using having
The oblique rolling extension diameter unit of major diameter class dish type roll carries out disposably expanding production.Oblique milling unit is on the basis of roll-type skew rolling mill
Upper development improvement forms, and it has the advantages that, and deformation velocity is fast, once expanding amount is big, production efficiency is high, but because its structure is multiple
Miscellaneous, equipment investment is big, oblique rolling extension diameter production method is complicated, is only applicable to high-volume heavy caliber seamless steel pipe and produces, and due to rotation
Turn expanding operational characteristic, make interiors of products and there is spiral lamination, surface quality is poor.
The Chinese patent literature of Publication No. CN101791627A, exists in product for existing oblique rolling extension diameter production method
Portion has spiral lamination, the poor technical problem of surface quality, discloses a kind of disc-type roller rotation Rolling pipe expander rolling large-calibre seamless steel
The method of pipe, the method is including foreground, main frame, one section of backstage, four independent regions of backstage two-stage nitration, and by four regions
Disc-type roller is connected to become by conveyor roller and revolves what Rolling pipe expander group region was carried out, the method comprises the following steps：1. on base pipe
Material：Effective for raw material base overhead traveling crane is hoisted on feeding skid；2. stepping stove heat：Cross roller-way through step raw material base Gutron 1. to send
Heated to heating furnace, heating-up temperature is 1150～1200 DEG C, and after being heated to the temperature of needs, raw material base pipe is from fortune of coming out of the stove
Defeated roller-way goes out heating furnace；3. disc-type roller expander：2. heat the raw material base pipe completing through step and disk is transported to by conveyor roller of coming out of the stove
Formula roller revolves Rolling pipe expander group region, on foreground after water under high pressure removes outer surface iron scale, delivers to disc type by conveyor roller
Rolled at roller rotation Rolling pipe expander main frame, in the operation of rolling, outer diameter of steel pipes is gradually increased, wall thickness is gradually reduced, complete to roll
Steel pipe afterwards advances to one section of backstage；It is fixed on gear pipe device and the two-stage nitration of backstage between for one section of the backstage and blocks base pipe, so that base pipe is stopped
Stay one section of backstage region, in this process, the push rod in insertion steel pipe then retreats with base pipe, and push rod retreats to backstage
Two-stage nitration, base pipe is routed up roll line to conveyor roller by stirring arm, transports and is rolled to subsequent processing；4. tapered roller expansion：
Enter tapered roller expansion unit through step steel pipe 3. and carry out expansion, improve steel pipe inner and outer surfaces quality, improve wall thickness accuracy；
5. walking-beam furnace heats again：If desired mend temperature or test instrument on line through step steel pipe 4., then enter step-by-step movement reheating furnace and carry out
Heat again, temperature is at 700～1000 DEG C：6. sizing：Through step steel pipe 5., outer surface of steel tube quality is improved by sizing operation,
Improve outer-diameter accuracy, after completing this operation, steel pipe is transported to cold bed through roller-way and carries out being cooled to room temperature；7. finishing procedure：It is cooled to
The steel pipe of room temperature carries out the finishing operations such as sawing, flaw detection, hydraulic pressure, spray mark, inspection in finishing operation area；8. put in storage：Complete above-mentioned
After operation, warehouse-in formality handled by qualified steel pipe, enters warehouse for finished product.The product surface quality that the method is obtained is good, copper pipe metal group
Knit uniformly, dimensional accuracy is high, thickness of steel pipe precision can reach scholar 8%, production efficiency is high, metal consumption is little.But the method is only suitable
Produce for high-volume heavy caliber seamless steel pipe, and due to rotating expanding operational characteristic, make interiors of products and still there is spiral
Stricture of vagina.
The expanding production method of drawing, is to be first to turn up cone by the raw material tube end thermal expansion after heating with pull-toggle type pipe expander,
In order to fixing body, then body is integrally heated, pull oneself to be inserted in mother tube the plug equipped with internal model with chain, steel pipe is becoming
Shape area circumference is tension, is axially tension, is radially compressive stress, can reach the mesh reducing wall thickness while expanding
's.Pull-toggle type pipe expander has the advantages that production efficiency is high, can process longer finished product, equipment can expanding undergauge to subtract wall multiplex, but
With the expanding production heavy caliber seamless steel pipe of pull-toggle type pipe expander drawing, need the prefabricated horn mouth of Special Equipment, and in drawing side
In formula deformation process, because deformed area is subject to larger action of pulling stress, after expanding deformation, steel pipe keeps tension state, may
The genetic defects of steel pipe are expanded, such as controls the improper steel pipe that is likely to result in break.Although it can reduce wall thickness but wall thickness is uncontrollable,
Outer-diameter accuracy is low, and steel tube surface is rough.Because pull-toggle type pipe expander low production efficiency, metal consumption are big, product quality is not good,
The expanding production method of drawing is not technically further developed.
The expanding production method of pushing and withstanding, is to use hydraulic push-type pipe expander, will be enclosed within fixing band expanding prick with hydraulic pressure push pedal
The pyrogen expects pipe of mandrel outer pushes through expanding prick and just completes expanding processing.Expanding process only occurs in plug, mother tube and correlation
Between fixedly connected part, steel pipe is tension, is axially compressive stress, is radially compressive stress, for this pipe expander in deformed area circumference
Stiffness structure is greatly simplified.With induction heating equipment of medium frequency, Quick uniform controllably heats pusher pipe expander to mother tube, at the uniform velocity
Propulsion deformation, can refine tubing microstructure, improve the mechanical property of materials it is ensured that tube body performance uniformity.Hydraulic push-type expands
Pipe machine has the advantages that small investment, equipment are simple, the construction period is short, good product quality, geometric accuracy high, lumber recovery is high.But
It is difficult to while expanding significantly alter wall thickness by process optimization, it is mainly for the production of the little heavy caliber of wall thickness change no
Seam steel pipe.Because the expanding production method of pushing and withstanding is Secondary expanding production method, the therefore length of the heavy caliber seamless steel pipe of production
Degree is shorter, and single machine production speed is slow.
The Chinese patent literature of Publication No. CN102189188A, human resources needed for existing for existing cold expansion technique
Many, easily cause, environmental pollution, the seamless stainless steel pipe properties of product aspect after cold expansion, pipe surface have obvious defect
Technical problem, disclose a kind of manufacturing process of thermal expansion large-diameter seamless stainless steel tube, mainly include the following steps that：(1) select
The main pipe of suitable thermal expansion finished product stainless steel tube, plug, connecting rod and turriform coil, and it is arranged on intermediate frequency hydraulic pressure two step pushing formula expander
On unit, turriform coil encircling therein is placed in main pipe in main pipe periphery, plug, and this unit bottom arranges pipe expanding set machine
Seat, this pipe expanding set support is provided with late gate and bearing, oil cylinder, mobile advance frame and front bearing, described mobile advance frame
Rear and front end is separately installed with connection advance frame gate, and oil cylinder is fixed on late gate bearing and is connected with advance frame, connecting rod one end
It is secured across advance frame gate and front bearing through late gate and be connected with plug；(2) plug region is adopted to arrange, described plug is certainly
First setting gradually to end is divided into Lead-In Area, deformed area, sizing area, clear area and aligning area, and connecting rod is connected with Lead-In Area and ensures
Concentricity is consistent, and connecting rod diameter is slightly less than Lead-In Area diameter；The diameter of bore of turriform coil entrance and exit respectively than main pipe and
The big 3-8cm of production tube external diameter, expander temperature determines according to stainless pipe material, and fltting speed is big according to the wall thickness of main pipe and reducing rate
Little determination；(3) pre-prepd main pipe inside pipe wall is uniformly coated with fire-resistant lubricants, connecting rod is passed through by main pipe by feeding platform
Endoporus, main pipe, in late gate, advance frame gate to turriform coil, closes late gate, and connecting rod tail end lived by lock, closes advance frame
Gate, makes main pipe one end be close to gate, and starting intermediate frequency and first heating plug and heat main pipe again makes main pipe to predetermined temperature, restarts liquid
Compressing cylinder, in the presence of oil cylinder, makes main pipe at the uniform velocity advance with advance frame, at plug reducing, thus realize stainless pipe expanding
Footpath purpose.The method for the manufacturing process such as hot rolling, hot extrusion, forging, this process equipment less investment, operation be simple,
Lumber recovery is high, produce batching flexibly and cycle is short, low cost of manufacture, particularly generally manufactures the cold of major diameter stainless pipe to current
Expand technique to compare, can more than 5 times of improve production efficiency；Simultaneously it is not necessary to middle reconditioning, annealing, pickling, passivation, can be a large amount of
Reduction gas consumption, saving human resources, minimizing environmental pollution, the high comprehensive performance of the seamless stainless steel pipe after thermal expansion,
Its tensile strength, yield strength are substantially better than the stainless pipe state after solid solution.But the method can only realize heavy caliber seamless steel pipe
, it is impossible to significantly alter wall thickness, it is mainly for the production of the little heavy caliber seamless steel pipe of wall thickness change for variable diameters.Due to it still
It is so Secondary expanding production method, the length of the heavy caliber seamless steel pipe of production is shorter, and single machine production speed is slow.
In sum, with diameter greater than the expanding production method of 400mm heavy caliber seamless steel pipe, oblique rolling extension diameter production method is deposited
In expanding production method complexity, equipment investment is big, be only applicable to the production of high-volume heavy caliber seamless steel pipe, makes interiors of products tool
There is spiral lamination, the poor technical problem of surface quality；After the expanding production method of drawing has expanding deformation, steel pipe keeps and is subject to
The genetic defects of steel pipe may be expanded, such as control the improper steel pipe that is likely to result in break by tension state.Although wall can be reduced
Thick but wall thickness is uncontrollable, outer-diameter accuracy is low, the rough technical problem of steel tube surface；The expanding production method of pushing and withstanding exists expanding
It is difficult to significantly alter wall thickness by process optimization, the length of the heavy caliber seamless steel pipe of production is shorter, single machine production speed simultaneously
Spend slow technical problem；It is thus desirable to one kind can be expanding and can change pipe thickness, pipe thickness is controlled, low production cost
The expanding production method of heavy caliber seamless steel pipe.
Content of the invention
The technical problem to be solved is to provide one kind can significantly change steel pipe walls in the case that wall thickness is controlled
The method of thick production Varying-thickness variable diameters steel pipe, thus improve the end product quality of the heavy caliber seamless steel pipe of expanding one-tenth further
And the one-time formed yields of heavy caliber seamless steel pipe, effectively reduce the production cost of heavy caliber seamless steel pipe.
The present invention solves technical problem and be employed technical scheme comprise that：
The method producing Varying-thickness variable diameters steel pipe, the pipe expander that the method adopts includes setting between pushing and withstanding end and drawing end
It is equipped with the frame of guide post group, is arranged on the ejector apparatus at frame pushing and withstanding end, be arranged on the draw-off gear at frame drawing end, along
Pushing and withstanding end is sequentially slidably matched the steel pipe feed end fixed plate being arranged in guide post group, steel pipe outfan admittedly to drawing extreme direction
Fixed board, has the expanding top of guide section, reducer, sizing section, and the working end of ejector apparatus is fixedly connected steel pipe feed end admittedly
Fixed board, the working end of draw-off gear is fixedly connected steel pipe outfan fixed plate, and steel pipe feed end fixed plate has expanding top
Through hole, the expanding top that the guide section of expanding top passes through steel pipe feed end fixed plate along drawing end to pushing and withstanding extreme direction leads to
Hole, its guide section is fixedly connected the pushing and withstanding end of frame；Also include adding for the hollow heating mother tube predeformation area and deformed area
Thermal, heater is set in the expanding top periphery of guide section and reducer intersection；The method comprises the following steps：
Step 1, by mother tube feed end by unidirectional for mother tube fixation：Select the expanding top being adapted with mother tube,
Mother tube is sleeved on expanding top, then by be set with the guide section of the expanding top of mother tube sequentially pass through heater,
The expanding top through hole of steel pipe feed end fixed plate, the guide section of expanding top is fixedly connected frame pushing and withstanding end, by mother tube
Feed end is fixedly connected steel pipe feed end fixed plate, and mobile steel pipe feed end fixed plate makes mother tube hold out against expanding top reducing
Section；
Step 2, ejector apparatus pushing and withstanding mother tube carry out pre- expanding to mother tube outfan：Mother tube holds out against expanding top and becomes
After the section of footpath, open heater and carry out heat treated to by carrying out pre- expanding mother tube outlet end part, when heat treated reaches
To the scheduled time, or the mother tube temperature measuring reaches predetermined value, opens ejector apparatus, and ejector apparatus are sent into by steel pipe
End fixed plate pushing and withstanding mother tube, mother tube along expanding top reducer plastic deformation, expanding after body in sizing section sizing；
When the sizing section of expanding top is completely in mother tube, and it is easy to for mother tube outfan to be directly fixedly connected steel pipe outfan
During fixed plate, mother tube outfan is pre- expanding to be completed；
Step 3, by mother tube feed end and outfan by mother tube twin fixed guide-vane：Mother tube outfan is pre- expanding to be completed
Afterwards, the outfan of mother tube is fixedly connected steel pipe outfan fixed plate, namely the fixation corresponding with outfan of mother tube feed end
Joint steel pipe feed end fixed plate and steel pipe outfan fixed plate；
Step 4, by ejector apparatus and draw-off gear, mother tube is carried out overall expanding：After mother tube twin fixed guide-vane,
Open heater, heat treated is carried out to mother tube predeformation area and deformed area, when heat treated reaches the scheduled time, or
The mother tube temperature measuring reaches predetermined value, opens ejector apparatus with the pushing and withstanding power needed for raw material thickness of pipe wall design load, with
Drawing power needed for raw material thickness of pipe wall design load opens draw-off gear, ejector apparatus from mother tube feed end pushing and withstanding mother tube,
Draw-off gear from mother tube outfan drawing mother tube, mother tube along expanding top reducer plastic deformation, expanding after pipe
Body in sizing section sizing, until whole mother tube completes expanding and sizing.
Further, the method producing Varying-thickness variable diameters steel pipe, is additionally included in expanding top sizing section periphery and sets in step 4
Put thickness of steel pipe detection means, when mother tube being carried out with overall expanding by ejector apparatus and draw-off gear, using steel pipe walls
Thickness detector measures expanding rear body wall thickness, and actual measurement wall thickness and wall thickness design load are compared, when actual measurement wall thickness exceedes wall
Thick design load span of control, then the output of the output of adjustment ejector apparatus or adjustment draw-off gear, until actual measurement
Wall thickness falls into wall thickness design load span of control.
Further, the method producing Varying-thickness variable diameters steel pipe, when actual measurement wall thickness exceedes wall thickness design load span of control, then
The output of adjustment ejector apparatus or the output of adjustment draw-off gear, until actual measurement wall thickness falls into wall thickness design load control
Scope processed is：When actual measurement wall thickness is more than wall thickness design load span of control, then will in the case that draw-off gear output is constant
The output of ejector apparatus reduces, or by the output of draw-off gear in the case that ejector apparatus output is constant
Increase, until actual measurement wall thickness falls into wall thickness design load span of control；When actual measurement wall thickness is less than wall thickness design load span of control, then exist
In the case that draw-off gear output is constant, the output of ejector apparatus is increased, or in ejector apparatus output not
In the case of change, the output of draw-off gear is reduced, until actual measurement wall thickness falls into wall thickness design load span of control.
Further, the method producing Varying-thickness variable diameters steel pipe, also includes increasing for controlling ejector apparatus to pipe expander
With the feeding Force control system of draw-off gear output, the data signal output of thickness of steel pipe detection means is electrically connected and taps into
To the data signal input of Force control system, the control signal outfan of feeding Force control system is electrically connected pushing and withstanding dress
Put the control signal input with draw-off gear；When mother tube being carried out with overall expanding by ejector apparatus and draw-off gear,
The expanding rear body wall thickness measuring is passed to feeding Force control system by thickness of steel pipe detection means, and feeding Force control system will
Actual measurement wall thickness and wall thickness design load are compared, and when actual measurement wall thickness exceedes wall thickness design load span of control, feed Force control system
The corresponding adjustment output of ejector apparatus or the output of draw-off gear, until actual measurement wall thickness falls into wall thickness design load control
Scope processed.
The method of the production Varying-thickness variable diameters steel pipe of the present invention is applied to the production of heavy caliber seamless steel pipe, equally also fits
For the production of bore metal pipe, it is of course also apply to the expanding production of plain bore seamless steel pipe.
Compared with prior art, the invention has the beneficial effects as follows：
1st, the method for the production Varying-thickness variable diameters steel pipe of the present invention, due to mother tube being sleeved on expanding top and incites somebody to action
Expanding top and mother tube is unidirectional is fixed in frame, is carried out pre- expanding with ejector apparatus pushing and withstanding mother tube to mother tube outfan
Method, have using same pipe expander realize mother tube drawing fixing end material molding technology effect, pre- expanding after
Mother tube outfan can directly be fixedly connected on steel pipe outfan fixed plate, carries out mother tube bi-directional drive integrally expanding.
Adopting Special Equipment compared to the expanding production method of drawing is the prefabricated horn mouth of mother tube, and the present invention adopts same
Pipe expander can be achieved with drawing fixing end machine-shaping, and by pre- expanding after mother tube outfan be directly fixedly connected on steel pipe
So that it may in ejector apparatus and draw-off gear from the bi-directional drive of two ends, it is integrally expanding to carry out mother tube, technique for outfan fixed plate
Flow process obtains greatly preferably, both having improved production efficiency, reduces process loss, thus pipe expanding cost is greatly reduced again.
Because the mother tube twin fixed guide-vane that will be sleeved on expanding top is in frame, by ejector apparatus and draw-off gear
Mother tube is carried out with overall expanding method, has and from mother tube feed end and pass through draw-off gear from raw material by ejector apparatus
The two-way offer of pipe outfan is used for the technical role of the external force of mother tube deformation, and this external force is expanding compared to existing drawing
Production method and the unidirectional external force of pushing and withstanding expanding production method generation, its produced circumference expanding for mother tube is drawn should
Power, radial compressive stress distribution on evenly, supply on more stable reliability, also can obtain preferably expanding effect；Also have
There is the relative size by adjusting ejector apparatus output and draw-off gear output, to realize becoming wall thickness for mother tube
The precise control of axial stress size technical role, namely the wall thickness of the expanding heavy caliber seamless steel pipe obtaining can accurately control
System.
See on the whole, each step of the present invention is technically interrelated, cooperate on using.So that this
Bright be not required to using special equipment prefabricated bell-mouthed in the case of, just can be with the higher production efficiency mother tube longer to length
Carry out the expanding change wall thickness operation of accurate size control, the heavy caliber seamless steel pipe production tube of output has excellent mechanical property
With geometric accuracy size.Due to pipe expanding become wall thickness caliber and and wall thickness controlled, also just accordingly reduce to raw material tube wall
The requirement of thickness, thus reducing technology difficulty, effectively reduces the production cost of heavy caliber fished pipe.The present invention eliminates existing
The expanding production method of pushing and withstanding cannot the longer heavy caliber seamless steel pipe of production length technical problem, eliminate existing drawing and expand
The heavy caliber seamless steel pipe pipe thickness that footpath production method produces is uncontrollable, and the technology of mechanical property and presentation quality difference is asked
Topic.
2nd, the method for the production Varying-thickness variable diameters steel pipe of the present invention, due to the tube body wall after expanding by real-time measurement
Thickness, actual measurement wall thickness and wall thickness design load is compared, the output adjusting ejector apparatus with this and the output of draw-off gear
Power, specific aim is higher, and effectiveness more preferably, is conducive to improving further the method producing Varying-thickness variable diameters steel pipe of the present invention
Produce product quality and the yields of heavy caliber seamless steel pipe, reduce mother tube loss, reduce production cost, improve and produce effect
Rate；By body wall thickness after expanding for the real-time measurement, and the output of self-adaptative adjustment ejector apparatus or draw-off gear
Output, so that the body wall thickness after expanding falls into wall thickness design load span of control, thus realize to ejector apparatus output work
Rate and timely, the precise control to expanding rear body wall thickness for the precise control, and then realization effectively of draw-off gear output,
Thus optimizing heavy caliber seamless steel pipe production technology further, improve the yields of the heavy caliber seamless steel pipe produced, effectively
Reduce product cost.
Brief description
Fig. 1 is the implementing procedure figure of the method for production Varying-thickness variable diameters steel pipe of the present invention.
Fig. 2 is the structural representation of the pipe expander of the present invention.
Fig. 3 carries out overall expanding schematic diagram for the present invention by ejector apparatus and draw-off gear to mother tube.
Reference in Fig. 2 to Fig. 3 is expressed as：
1- frame, 2- draw-off gear, 3- ejector apparatus, 4- steel pipe feed end fixed plate, 5- steel pipe outfan fixed plate, 6-
Expanding top, 7- heater, 8- thickness of steel pipe detection means, 9- mother tube, 101- pushing and withstanding end, 102- drawing end, 103- leads
To bar group, 601- guide section, 602- reducer, 603- sizing section.
In figure arrow mark is expressed as：Direction to the power that mother tube applies.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in Fig. 2 the present invention production Varying-thickness variable diameters steel pipe method, the method adopt pipe expander include pushing away
It is provided with the frame 1 of guide post group 103 between top 101 and drawing end 102, be arranged on the ejector apparatus at frame 1 pushing and withstanding end 101
3, it is arranged on the draw-off gear 2 at frame 1 drawing end 102, be sequentially slidably matched to drawing end 102 direction along pushing and withstanding end 101 and set
Put steel pipe feed end fixed plate 4 in guide post group 103, steel pipe outfan fixed plate 5, there is guide section 601, reducer
602nd, the expanding top 6 of sizing section 603, the working end of ejector apparatus 3 is fixedly connected steel pipe feed end fixed plate 4, draw-off gear 2
Working end be fixedly connected steel pipe outfan fixed plate 5, steel pipe feed end fixed plate 4 has expanding top through hole, expanding top
6 guide section 601 arrives pushing and withstanding end 101 direction along drawing end 102 and passes through the expanding top of steel pipe feed end fixed plate 4 to lead to
Hole, its guide section 601 is fixedly connected the pushing and withstanding end 101 of frame 1；Also include for heating mother tube 9 predeformation area and deformed area
Hollow heater 7, heater 7 is set in expanding top 6 periphery of guide section 601 and reducer 602 intersection.
Wherein, ejector apparatus 3 and draw-off gear 2 are feed arrangement, both can be air pressure feed arrangement or liquid
Pressure feed arrangement, can also be sctew feeder.Ejector apparatus 3, draw-off gear 2 generally adopt by piston cylinder and piston rod structure
The feed mechanism becoming；The guide section 601 of expanding top 6 is long column shape structure, and reducer 602 is circular cone structure, sizing section 603
For column structure；Heater 7 is to be set with resistance heater or the Electromagnetic Heating that the expanding top 6 of steel pipe can extend there through
Device, it is preferred to use intermediate frequency electromagnetic heater.Generally frame 1 arrives drawing end 102 direction along pushing and withstanding end 101 and lays guide post group
103, steel pipe feed end fixed plate 4, steel pipe outfan fixed plate 5 are in the work of ejector apparatus 3 ejection force and draw-off gear 2 pulling capacity
With under, can be mobile along guide post group 103.
As shown in figure 1, the method for the production Varying-thickness variable diameters steel pipe of the present invention, including will be former by mother tube feed end
The unidirectional fixation of expects pipe, ejector apparatus pushing and withstanding mother tube carries out pre- expanding, by mother tube feed end and defeated to mother tube outfan
Go out end by mother tube twin fixed guide-vane, overall expanding four steps are carried out by ejector apparatus and draw-off gear to mother tube.Specifically
Process is as follows：
Step 1, by mother tube feed end by unidirectional for mother tube fixation：Select the expanding top being adapted with mother tube 9
6, mother tube 9 is sleeved on expanding top 6, then the guide section 601 being set with the expanding top 6 of mother tube 9 is sequentially passed through
Heater 7, the expanding top through hole of steel pipe feed end fixed plate 4, the guide section 601 of expanding top 6 is fixedly connected frame 1
Pushing and withstanding end 101, mother tube 9 feed end is fixedly connected steel pipe feed end fixed plate 4, and mobile steel pipe feed end fixed plate 4 makes former
Expects pipe 9 holds out against expanding top 6 reducer 602.
During enforcement, those skilled in the art, the specification according to mother tube 9 selects the specification of expanding top 6,
Namely expanding top 6 guide section 601 length is more than mother tube 9 length, the diameter of expanding top 6 sizing section 603 be equal to expanding after
Heavy caliber production tube diameter, the axial direction of the axial length of expanding top 6 reducer 602 and expanding top 6 sizing section 603 is long
Degree, is actually needed according to technique and is determined.
During enforcement, those skilled in the art, the guide section 601 of expanding top 6 is inserted from mother tube 9 outfan, from
Mother tube 9 feed end passes, thus mother tube 9 is sleeved on the guide section 601 of expanding top 6；Above-mentioned raw materials pipe 9 outfan
Refer to mother tube 9 is carried out at first expanding one end, mother tube 9 feed end refers to finally carry out expanding one end to mother tube 9；
The expanding top 6 that will be equipped with mother tube 9 more sequentially passes through heater 7, the expanding top through hole of steel pipe feed end fixed plate 4,
The guide section 601 of expanding top 6 is fixedly connected frame 1 pushing and withstanding end 101, mother tube 9 feed end is fixedly connected steel pipe and is sent into
End fixed plate 4, promotes steel pipe feed end fixed plate using Manual-pushing steel pipe feed end fixed plate 4 or using ejector apparatus 3
4, promote mother tube 9 mobile to expanding top 6 reducer 602, when mother tube 9 outfan holds out against expanding top 6 reducer 602
Afterwards, stop applying ejection force, be fixed on unidirectional for mother tube 9 in frame 1；
Step 2, ejector apparatus pushing and withstanding mother tube carry out pre- expanding to mother tube outfan：Mother tube 9 holds out against expanding top 6
After reducer 602, open heater 7 and carry out heat treated to by carrying out pre- expanding mother tube 9 outlet end part, work as heating
Process reaches the scheduled time, or mother tube 9 temperature measuring reaches predetermined value, opens ejector apparatus 3, and ejector apparatus 3 lead to
Cross steel pipe feed end fixed plate 4 pushing and withstanding mother tube 9, mother tube 9 along expanding top 6 reducer 602 plastic deformation, expanding after
Body is in sizing section 603 sizing；When the sizing section 603 of expanding top 6 is completely in mother tube 9, and be easy to will be defeated for mother tube 9
Go out end when being directly fixedly connected steel pipe outfan fixed plate 5, mother tube 9 outfan is pre- expanding to be completed.
During enforcement, those skilled in the art, according to the needs of the pre- expanding deformation of mother tube 9, determine the work of ejector apparatus 3
Make output.According to the heat treated needs of mother tube 9 deformed area, determine heater 7 along the length of expanding top 6 axial direction
Degree and the heating power of heater 7.
During enforcement, those skilled in the art, opens heater 7 and is pointed to expanding top 6 guide section 601 and reducer
Mother tube 9 part of 602 junctions both sides carries out heat treated.After heat treated reaches the scheduled time, or measure
After mother tube 9 body temperature reaches predetermined value, open ejector apparatus 3, ejector apparatus 3 send according to intended power output pushing and withstanding steel pipe
Inlet side fixed plate 4, along the axial pushing and withstanding mother tube 9 of expanding top 6, mother tube 9 is along expanding top for steel pipe feed end fixed plate 4
6 reducers 602 carry out expanding plastic deformation, complete expanding body in sizing section 603 sizing；Sizing section when expanding top 6
603, completely in mother tube 9, continue pushing and withstanding mother tube 9, until being easy to be fixedly connected on mother tube 9 by its outfan
When in steel pipe outfan fixed plate 5, close heater 7, close ejector apparatus 3, mother tube 9 outfan is pre- expanding to be completed.
Adopting Special Equipment compared to the expanding production method of drawing is the prefabricated horn mouth of mother tube 9, and this step is adopted
Ejector apparatus pushing and withstanding mother tube carries out pre- diameter enlarging method to mother tube outfan it is not necessary to additionally increase equipment, just can process former
The drawing fixing end of expects pipe 9, technological process obtains greatly preferably, both having improved production efficiency, reduces process loss again, thus
Pipe expanding cost is greatly reduced.
Step 3, by mother tube feed end and outfan by mother tube twin fixed guide-vane：Mother tube 9 outfan is pre- expanding complete
Cheng Hou, the outfan of mother tube 9 is fixedly connected steel pipe outfan fixed plate 5, namely mother tube 9 feed end is corresponding with outfan
It is fixedly connected steel pipe feed end fixed plate 4 and steel pipe outfan fixed plate 5.
During enforcement, those skilled in the art, in the case of taking off mother tube 9 not from expanding top 6, by mother tube
9 outfan is directly fixedly connected steel pipe outfan fixed plate 5, also will be fixedly connected steel pipe by its feed end by mother tube 9
Feed end fixed plate 4, mother tube 9 is fixedly connected steel pipe outfan fixed plate 5 by its outfan, namely realizes mother tube 9
Twin fixed guide-vane.
Step 4, by ejector apparatus and draw-off gear, mother tube is carried out overall expanding：After mother tube 9 twin fixed guide-vane,
Open heater 7, heat treated is carried out to mother tube 9 predeformation area and deformed area, when heat treated reaches the scheduled time, or
Mother tube 9 temperature that person measures reaches predetermined value, opens ejector apparatus with the pushing and withstanding power needed for mother tube 9 wall thickness design load
3, draw-off gear 2 is opened with the drawing power needed for mother tube 9 wall thickness design load, ejector apparatus 3 are from mother tube 9 feed end pushing and withstanding
Mother tube 9, from mother tube 9 outfan drawing mother tube 9, mother tube 9 is along expanding top 6 reducer 602 plasticity for draw-off gear 2
Deformation, expanding after body in sizing section 603 sizing, until whole mother tube 9 completes expanding and sizing.
This step realizes the expanding change wall thickness of mother tube 9 body using ejector apparatus 3 pushing and withstanding and draw-off gear 2 drawing mode
When, for the expanding circumferential tension of mother tube 9 and radial compressive stress, the circumferential tension that produced by ejector apparatus 3 ejection force,
The circumferential tension of radial compressive stress and the generation of draw-off gear 2 pulling capacity, radial compressive stress add up respectively and are formed, for mother tube
The axial tension stress of 9 change wall thickness, the axial tension stress being produced by draw-off gear 2 pulling capacity and ejector apparatus 3 ejection force produce axle
Formed after subtracting each other to compressive stress.If the wall thickness of the heavy caliber seamless steel pipe of expanding one-tenth need not significantly change, ejector apparatus 3
Output is more than or is equal to the output of draw-off gear 2 it is ensured that the axial stress that mother tube 9 deformed area is subject to is axially
Compressive stress, in the case that axial stress is for axial compression stress, the wall thickness change very little of the expanding heavy caliber seamless steel pipe obtaining；
If the wall thickness of the heavy caliber seamless steel pipe of expanding one-tenth needs to produce significantly changed, the output of ejector apparatus 3 is less than and draws
The output of pulling device 2, it is ensured that the axial stress that mother tube 9 deformed area is subject to is axial tension stress, is axle in axial stress
To in the case of tension, the wall thickness of the expanding heavy caliber seamless steel pipe obtaining can produce large change.The raw material of one specification
Pipe 9, by its expanding become predetermined wall thickness design load heavy caliber seamless steel pipe, the output of corresponding one group of ejector apparatus 3 and
The output of draw-off gear 2.
During enforcement, those skilled in the art, the wall thickness of the heavy caliber seamless steel pipe according to the expanding one-tenth of mother tube 9 requires,
Determine the output of ejector apparatus 3 and the output of draw-off gear 2.As shown in Figure 2 and Figure 3, in mother tube 9 twin fixed guide-vane
After in frame 1, open heater 7, heat treated is carried out to mother tube 9 predeformation area and deformed area, when heat treated reaches
To the scheduled time, or mother tube 9 temperature measuring reaches predetermined value, with the pushing and withstanding work(needed for mother tube 9 wall thickness design load
Rate opens ejector apparatus 3, opens draw-off gear 2 with the drawing power needed for mother tube 9 wall thickness design load, ejector apparatus 3 are from former
Expects pipe 9 feed end pushing and withstanding mother tube 9, from mother tube 9 outfan drawing mother tube 9, mother tube 9 is along expanding top for draw-off gear 2
6 axially-movables, the reducer 602 of mother tube 9 deformed area after local heat treatment and expanding top 6 produces extruding,
Be applied to mother tube 9 deformed area circumference tension in expanding top 6, in the presence of radial compressive stress, mother tube 9 deformed area produces
Expanding deformation, the most at last mother tube 9 expanding become the maximum corresponding caliber of excircle of reducer 602, be applied to former in expanding top 6
In the presence of expects pipe 9 deformed area axial tension stress, mother tube 9 deformed area significantly feed change pipe 9 wall thickness, mother tube 9 the most at last
Wall thickness is reduced to the output of ejector apparatus 3 and the output corresponding wall thickness design load of draw-off gear 2；Pipe after expanding
Body sizing section 603 carry out expansion, more straight sizing processing it is ensured that the heavy caliber seamless steel pipe after expanding change wall thickness have good
Product quality.Ejector apparatus 3 and draw-off gear 2 continuously promote undeformed mother tube 9 body to expanding top 6 deformation section and to determine
Footpath section 603 is moved, and until whole mother tube 9 completes expanding and sizing, also will entirely the expanding wall thickness that becomes of mother tube 9 become to reach and set
The heavy caliber seamless steel pipe production tube of evaluation.During realizing mother tube 9 expanding change wall thickness, heater 7 is pointed to guide
The mother tube 9 predeformation area of section 601 peripheries carries out heat treated, to improve the plastic deformation ability in mother tube 9 predeformation area, right
The positive deformed area of mother tube 9 being in reducer 602 periphery carries out all heat-treated, is become with the plasticity improving the positive deformed area of mother tube 9
The uniformity of shape.
Compared to the unidirectional expanding production method of drawing applying pipe deformation stress and the expanding production method of pushing and withstanding, this step
Adopted carries out overall expanding method by ejector apparatus and draw-off gear, for mother tube 9 expanding week to mother tube
Two-way by the ejector apparatus 3 of mother tube 9 feed end and the draw-off gear 2 of mother tube 9 outfan to tension, radial compressive stress
Cumulative provide so that expanding circumferential tension, radial compressive stress in distribution evenly, more stable reliability on supplying.
Become the axial stress of wall thickness for mother tube 9, its attribute both can be axial compression stress or axial tension stress, axially
The size of stress accurately can be controlled by adjusting ejector apparatus 3 output and draw-off gear 2 output relative value
System, thus expanding simultaneously in mother tube 9, realize the significantly change of mother tube 9 wall thickness, the heavy caliber seamless steel pipe finally obtaining becomes
The wall thickness of QC can get precise control.
It is more than the basic embodiment of the present invention.Can be seen that from above-mentioned implementation process：
Mother tube 9 is sleeved on expanding top 6 and is fixed on unidirectional to expanding top 6 and mother tube 9 in frame 1, use
Ejector apparatus pushing and withstanding mother tube carries out pre- expanding method to mother tube outfan, has and realizes raw material using same pipe expander
Pipe 9 drawing fixing end material molding technology effect, pre- expanding after mother tube 9 outfan can directly be fixedly connected on steel pipe
Outfan fixed plate 5, carries out mother tube 9 bi-directional drive integrally expanding.
Adopting Special Equipment compared to the expanding production method of drawing is the prefabricated horn mouth of mother tube 9, and the present invention adopts same
Platform pipe expander can be achieved with drawing fixing end machine-shaping, and by pre- expanding after mother tube 9 outfan be directly fixedly connected on
Steel pipe outfan fixed plate 5 is so that it may in ejector apparatus 3 and draw-off gear 2 from the bi-directional drive of two ends, carry out mother tube 9 overall
Expanding, technological process obtains greatly preferably, both having improved production efficiency, reduces process loss, thus steel pipe is greatly reduced again
Expanding cost.
By the mother tube 9 being sleeved on expanding top 6 twin fixed guide-vane in frame 1, by ejector apparatus and draw-off gear
Mother tube is carried out with overall expanding method, have by ejector apparatus 3 from mother tube 9 feed end and by draw-off gear 2 from
The two-way offer of mother tube 9 outfan is used for the technical role of the external force of mother tube 9 deformation, and this external force is drawn compared to existing
Pull out the unidirectional external force that expanding production method and the expanding production method of pushing and withstanding produce, it is produced expanding for mother tube 9
Circumferential tension, radial compressive stress distribution on evenly, supply on more stable reliability, also can obtain preferably expanding effect
Really；Also there is the relative size by adjusting ejector apparatus 3 output and draw-off gear 2 output, to realize for former
The technical role of the precise control of axial stress size of expects pipe 9 change wall thickness, namely the expanding heavy caliber seamless steel pipe obtaining
Body wall thickness energy precise control.
See on the whole, each step of the present invention is technically interrelated, cooperate on using.So that this
Bright be not required to using special equipment prefabricated bell-mouthed in the case of, just can be with the higher production efficiency mother tube longer to length
The 9 expanding change wall thickness operations carrying out accurate size control, the heavy caliber seamless steel pipe production tube of output has excellent mechanical property
Can be with geometric accuracy size.Due to pipe expanding become wall thickness caliber and and wall thickness controlled, also just corresponding reduction is managed to mother tube 9
The requirement of wall thickness, thus reducing technology difficulty, effectively reduces the production cost of heavy caliber fished pipe.The present invention eliminates existing
The expanding production method of some pushing and withstanding cannot the longer heavy caliber seamless steel pipe of production length technical problem, eliminate existing drawing
The heavy caliber seamless steel pipe pipe thickness that expanding production method produces is uncontrollable, and the technology of mechanical property and presentation quality difference is asked
Topic.
Pipe expander after being used for multiple times, expanding after the corresponding ejector apparatus of heavy caliber seamless steel pipe design load 3 output
There is deviation in the wall thickness dimension of the heavy caliber seamless steel pipe of output output of power and draw-off gear 2 and original design value, because
This needs the wall thickness dimension of the heavy caliber seamless steel pipe according to actual output, adjusts the output of ejector apparatus 3 in time and draws
The output of pulling device 2, to produce the heavy caliber seamless steel pipe of the pipe thickness corresponding to actual needs.
In order to adjust the output of ejector apparatus 3 and the output of draw-off gear 2 in time, the present invention is implemented on basis
It is further improved on the basis of mode, first preferred implementation of the present invention is, in expanding top 6 sizing section 603 periphery
Setting thickness of steel pipe detection means 8, when mother tube being carried out with overall expanding by ejector apparatus and draw-off gear, using steel pipe
Wall Thickness Testing Device 8 measures expanding rear body wall thickness, and actual measurement wall thickness and wall thickness design load are compared, when actual measurement wall thickness exceedes
Wall thickness design load span of control, then the output of the output of adjustment ejector apparatus 3 or adjustment draw-off gear 2, until
Actual measurement wall thickness falls into wall thickness design load span of control.Specifically, when actual measurement wall thickness is more than wall thickness design load span of control, then drawing
In the case that pulling device 2 output is constant, the output of ejector apparatus 3 is reduced, or in ejector apparatus 3 output
In the case of constant, the output of draw-off gear 2 is increased, until actual measurement wall thickness falls into wall thickness design load span of control；Work as reality
Survey wall thickness and be less than wall thickness design load span of control, then in the case that draw-off gear 2 output is constant, ejector apparatus 3 are defeated
Go out power to increase, or in the case that ejector apparatus 3 output is constant, the output of draw-off gear 2 is reduced, until
Actual measurement wall thickness falls into wall thickness design load span of control.
Above-mentioned actual measurement wall thickness and wall thickness design load are compared, can be compared using manually tabling look-up, it would however also be possible to employ people
Work calculates and compares, and can also be calculated using machine and compare.
This first preferred implementation body wall thickness after expanding by real-time measurement, will survey wall thickness and wall thickness design load
It is compared, the output of the output that ejector apparatus 3 are adjusted with this and draw-off gear 2, specific aim is higher, effectiveness is more
Good, be conducive to the method improving the production Varying-thickness variable diameters steel pipe of the present invention further to produce the product of heavy caliber seamless steel pipe
Quality and yields, reduce mother tube 9 and are lost, reduce production cost, improve production efficiency.
Compare the time in order to reduce actual measurement wall thickness and wall thickness design load, the large-calibre seamless after timely, effective process is expanding
The wall thickness of steel pipe is abnormal, and the present invention is further improved on the basis of the first preferred implementation, and the second of the present invention is preferred
Embodiment is to increase the feeding Force control system for controlling ejector apparatus 3 and draw-off gear 2 output to pipe expander,
By the data signal input of the data signal output electrical connection feeding Force control system of thickness of steel pipe detection means 8, will enter
It is electrically connected the control signal input of ejector apparatus 3 and draw-off gear 2 to the control signal outfan of Force control system；?
When mother tube being carried out with overall expanding by ejector apparatus and draw-off gear, thickness of steel pipe detection means 8 is expanding by measure
Body wall thickness passes to feeding Force control system afterwards, and actual measurement wall thickness and wall thickness design load are compared by feeding Force control system,
When actual measurement wall thickness exceedes wall thickness design load span of control, feeding Force control system accordingly adjust ejector apparatus 3 output or
The output of person's draw-off gear 2, until actual measurement wall thickness falls into wall thickness design load span of control.
This second preferred implementation body wall thickness after expanding by real-time measurement, and self-adaptative adjustment ejector apparatus 3
Output or draw-off gear 2 output so that the body wall thickness after expanding falls into wall thickness design load span of control,
Thus realizing timely, precise control, and then realization effectively to ejector apparatus 3 output and draw-off gear 2 output
Precise control to expanding rear body wall thickness, thus optimizing heavy caliber seamless steel pipe production technology further, raising is produced
The yields of heavy caliber seamless steel pipe, effectively reduces product cost.
It is more than the implementation process of the method for production Varying-thickness variable diameters steel pipe of the present invention.Permissible from above-mentioned implementation process
Find out, when pipe expanding is become heavy caliber seamless steel pipe, the present invention realizes not only significantly changing thickness of steel pipe but also to after expanding
Thickness of steel pipe precise control, the heavy caliber seamless steel pipe produced has good mechanical property and preferably presentation quality.This
Invention eliminate the expanding production method of existing pushing and withstanding cannot the longer heavy caliber seamless steel pipe of production length technical problem, eliminate
The heavy caliber seamless steel pipe pipe thickness that the expanding production method of existing drawing produces is uncontrollable, and mechanical property and presentation quality
The technical problem of difference.
Claims (4)
1. the method producing Varying-thickness variable diameters steel pipe, the pipe expander that the method adopts includes pushing and withstanding end (101) and drawing end
(102) it is provided with the frame (1) of guide post group (103) between, be arranged on the ejector apparatus (3) at frame (1) pushing and withstanding end (101),
It is arranged on the draw-off gear (2) at frame (1) drawing end (102), sequentially slide to drawing end (102) direction along pushing and withstanding end (101)
Dynamic steel pipe feed end fixed plate (4) being equipped with guide post group (103), steel pipe outfan fixed plate (5), have guiding
Section (601), reducer (602), the expanding top (6) of sizing section (603), the working end of ejector apparatus (3) is fixedly connected steel pipe
Feed end fixed plate (4), the working end of draw-off gear (2) is fixedly connected steel pipe outfan fixed plate (5), and steel pipe feed end is fixed
Expanding top through hole is had on plate (4), the guide section (601) of expanding top (6) arrives pushing and withstanding end (101) along drawing end (102)
Direction passes through the expanding top through hole of steel pipe feed end fixed plate (4), and its guide section (601) is fixedly connected the pushing and withstanding of frame (1)
End (101)；Also include the hollow heater (7) for heating mother tube (9) predeformation area and deformed area, described heater
(7) it is set in expanding top (6) periphery of guide section (601) and reducer (602) intersection；It is characterized in that, the method bag
Include following steps：
Step 1, by mother tube feed end by unidirectional for mother tube fixation：Select the expanding top being adapted with mother tube (9)
(6), mother tube (9) is sleeved on expanding top (6), then the guide section of the expanding top (6) of mother tube (9) will be set with
(601) sequentially heater (7), the expanding top through hole of steel pipe feed end fixed plate (4) are passed through, by leading of expanding top (6)
It is fixedly connected frame (1) pushing and withstanding end (101) to section (601), mother tube (9) feed end is fixedly connected steel pipe feed end fixed plate
(4), mobile steel pipe feed end fixed plate (4) makes mother tube (9) hold out against expanding top (6) reducer (602)；
Step 2, ejector apparatus pushing and withstanding mother tube carry out pre- expanding to mother tube outfan：Mother tube (9) holds out against expanding top (6)
After reducer (602), open heater (7) and carry out heat treated to by carrying out pre- expanding mother tube (9) outlet end part,
When heat treated reaches the scheduled time, or mother tube (9) temperature measuring reaches predetermined value, opens ejector apparatus (3), pushes away
Ejection device (3) passes through steel pipe feed end fixed plate (4) pushing and withstanding mother tube (9), and mother tube (9) is along expanding top (6) reducer
(602) plastic deformation, expanding after body in sizing section (603) sizing；When the sizing section (603) of expanding top (6) enters completely
Enter in mother tube (9), and when being easy to for mother tube (9) outfan to be directly fixedly connected steel pipe outfan fixed plate (5), mother tube
(9) outfan is pre- expanding completes；
Step 3, by mother tube feed end and outfan by mother tube twin fixed guide-vane：Mother tube (9) outfan is pre- expanding to be completed
Afterwards, the outfan of mother tube (9) is fixedly connected steel pipe outfan fixed plate (5), namely mother tube (9) feed end and outfan
Correspondence is fixedly connected steel pipe feed end fixed plate (4) and steel pipe outfan fixed plate (5)；
Step 4, by ejector apparatus and draw-off gear, mother tube is carried out overall expanding：After mother tube (9) twin fixed guide-vane, open
Open heater (7), heat treated is carried out to mother tube (9) predeformation area and deformed area, when heat treated reaches the scheduled time,
Or mother tube (9) temperature measuring reaches predetermined value, with the pushing and withstanding work(needed for wall thickness design load after expanding for the mother tube (9)
Rate opens ejector apparatus (3), opens draw-off gear (2) with the drawing power needed for wall thickness design load after expanding for the mother tube (9),
, from mother tube (9) feed end pushing and withstanding mother tube (9), draw-off gear (2) is former from mother tube (9) outfan drawing for ejector apparatus (3)
Expects pipe (9), mother tube (9) along expanding top (6) reducer (602) plastic deformation, expanding after body in sizing section (603)
Sizing, until whole mother tube (9) completes expanding and sizing.
2. the method producing Varying-thickness variable diameters steel pipe according to claim 1 is it is characterised in that also include in step 4
In expanding top (6) sizing section (603) periphery setting thickness of steel pipe detection means (8), by ejector apparatus and draw-off gear
When mother tube is carried out with overall expanding, expanding rear body wall thickness is measured using thickness of steel pipe detection means (8), will survey wall thickness with
Wall thickness design load after mother tube (9) is expanding is compared, when survey wall thickness exceed mother tube (9) expanding after wall thickness design load
Span of control, then the output of the output of adjustment ejector apparatus (3) or adjustment draw-off gear (2), until surveying wall
Thickness fall into mother tube (9) expanding after wall thickness design load span of control.
3. the method producing Varying-thickness variable diameters steel pipe according to claim 2 is it is characterised in that described work as actual measurement wall thickness
Exceed mother tube (9) expanding after wall thickness design load span of control, then adjustment ejector apparatus (3) output or adjustment draw
The output of pulling device (2), until actual measurement wall thickness fall into mother tube (9) expanding after wall thickness design load span of control be：
When surveying wall thickness design load span of control more than mother tube (9) after expanding for the wall thickness, then in draw-off gear (2) output
In the case of constant, the output of ejector apparatus (3) is reduced, or in the case that ejector apparatus (3) output is constant
The output of draw-off gear (2) is increased, until actual measurement wall thickness fall into mother tube (9) expanding after wall thickness design load control model
Enclose；When surveying wall thickness design load span of control less than mother tube (9) after expanding for the wall thickness, then in draw-off gear (2) output
In the case of constant, the output of ejector apparatus (3) is increased, or in the case that ejector apparatus (3) output is constant
The output of draw-off gear (2) is reduced, until actual measurement wall thickness fall into mother tube (9) expanding after wall thickness design load control model
Enclose.
4. the method for the production Varying-thickness variable diameters steel pipe according to Claims 2 or 3 is it is characterised in that also include to expansion
Pipe machine increases the feeding Force control system for controlling ejector apparatus (3) and draw-off gear (2) output, and thickness of steel pipe is examined
Survey the data signal input of the data signal output electrical connection feeding Force control system of device (8), centripetal force is controlled system
The control signal outfan of system is electrically connected ejector apparatus (3) and the control signal input of draw-off gear (2)；By pushing away
When ejection device and draw-off gear carry out overall expanding to mother tube, thickness of steel pipe detection means (8) by measure expanding after manage
Body wall thickness passes to feeding Force control system, feeding Force control system will survey wall thickness and mother tube (9) expanding after wall thickness set
Evaluation is compared, when survey wall thickness exceed mother tube (9) expanding after wall thickness design load span of control, feed Force control system
The output of corresponding adjustment ejector apparatus (3) or the output of draw-off gear (2), until actual measurement wall thickness falls into mother tube
(9) the wall thickness design load span of control after expanding.
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| CN111922220B (en) * | 2020-06-18 | 2022-07-12 | 有研工程技术研究院有限公司 | Device and method for stretching and expanding memory alloy pipe joint |
| CN113020460A (en) * | 2021-03-02 | 2021-06-25 | 有研工程技术研究院有限公司 | Expanding method of shape memory alloy pipe joint |
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|---|---|---|---|---|
| CN2363809Y (en) * | 1999-03-18 | 2000-02-16 | 武湘川 | Pipe expander |
| CN101104191A (en) * | 2007-08-02 | 2008-01-16 | 高新张铜股份有限公司 | Super-long hollow metal tube diameter enlarging method |
| CN202045287U (en) * | 2011-05-06 | 2011-11-23 | 金川集团有限公司 | Pipe pushing type pipe expanding drawing head-making device |
| CN202861229U (en) * | 2012-09-11 | 2013-04-10 | 浙江格洛斯无缝钢管有限公司 | Modified push type hot pipe expander |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4935550B2 (en) * | 2007-07-13 | 2012-05-23 | 住友金属工業株式会社 | Metal tube manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2363809Y (en) * | 1999-03-18 | 2000-02-16 | 武湘川 | Pipe expander |
| CN101104191A (en) * | 2007-08-02 | 2008-01-16 | 高新张铜股份有限公司 | Super-long hollow metal tube diameter enlarging method |
| CN202045287U (en) * | 2011-05-06 | 2011-11-23 | 金川集团有限公司 | Pipe pushing type pipe expanding drawing head-making device |
| CN202861229U (en) * | 2012-09-11 | 2013-04-10 | 浙江格洛斯无缝钢管有限公司 | Modified push type hot pipe expander |
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Effective date of registration: 20230915 Address after: No. 1006, Floor 10, Unit 1, Building 17, No. 89, Hezuo Road, High tech Zone, Chengdu, Sichuan 611731 Patentee after: PANGANG GROUP RESEARCH INSTITUTE Co.,Ltd. Patentee after: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Address before: 611731 Panzhihua Iron and Steel Group Research Institute Co., Ltd., innovation group, Western Park, Chengdu high tech Zone, Sichuan Province Patentee before: PANGANG GROUP RESEARCH INSTITUTE Co.,Ltd. |