CN107626766A - A kind of rolling manufacture method of special-shaped seamless steel pipe - Google Patents
A kind of rolling manufacture method of special-shaped seamless steel pipe Download PDFInfo
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Abstract
The present invention relates to a kind of rolling manufacture method of special-shaped seamless steel pipe, and the manufacture of special-shaped seamless steel pipe is directly realized using cold rolling, specifically includes following processing step：Raw material → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat treatment → aligning → mark → storage；Heat rolling is first carried out to obtain the special-shaped seamless steel tube blank of progress cold rolling under normal temperature, the manufacture of special-shaped seamless steel pipe is then realized using cold rolling, specifically includes following processing step：Raw material → heating → hot rolling → annealing → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat treatment → aligning → mark → storage.Advantage is：Manufacturing for special-shaped seamless steel pipe is not realized by raw material with being limited.The hot technology mode for rolling and being combined with cold rolling or individually carrying out cold rolling is carried out using rolling tools, plug mold, there is the advantages of easy to implement, high yield rate.Meanwhile, it is capable to flexible combination installation, and the precision of installation can be controlled as needed.
Description
Technical field
The invention belongs to manufacture seamless steel pipe product technical field, more particularly to a kind of rolling manufacture of special-shaped seamless steel pipe
Method.
Background technology
Chapped pipe is the general name of the steel pipe of other cross sectional shapes in addition to pipe.With construction industry, manufacturing industry, boat
The height of the every profession and trades such as its aviation, ocean engineering, petrochemical industry, electric power, highway, high-speed railway, mining machinery, engineering machinery
Speed development, chapped pipe have been to be concerned by more and more people as the economic section section bar that can meet different stressing conditions.Abnormity
Steel pipe is suitable for the particularity of use condition, saves metal and improves the labor productivity of parts manufacture.Chapped pipe one
As have larger the moment of inertia and modulus of section, have larger bending resistance, anti-twisting property, can significantly mitigate construction weight, save
Steel.The disconnected section of chapped pipe has all kinds：Ellipse, square-outside and round-inside type, hexangle type, square, octagon, it is semi-circular,
Inequilateral hexangle type, melon seeds type etc., it is numerous.
The main method of traditional manufacture special-shaped seamless steel pipe has cold-drawn, electric welding, extruding, hot rolling etc., and wherein cold-drawing process obtains
It is widely applied to comparing：
One of traditional main method of manufacture special-shaped seamless steel pipe is " cold-drawing process " production technology, its production procedure bag
Include：Pipe → heating → is taken the lead → annealed → pickling → lubrication → cold-drawn → heat treatment → aligning → flaw detection → mark → storage.
The limitation of this method be it is strict to raw material (the waste pipe of cold-drawn) specification requirement, a cold-drawn touch can only accommodation it is narrower
Special-shaped seamless tube product production, when production specification changes, it is necessary to change cold-drawn mould, production specification change it is dumb and
Change time length used in production specification.
Number of patent application：201210332169.8 a kind of manufacture method of special-shaped seamless steel pipe is disclosed, using hot extrusion
The mode engaged with cold-drawing technology, this method do not have substantial differences with cold-drawing technology, are attempt to pass through heat in place of its key
The deflection of extruding, which has, changes rich degree to enable a certain cold-drawn mould to receive the pipe of different-diameter, but the hair that cold-drawn mould receives
Base --- the production technology of waste pipe does not change.In other words, the patent be with the investment of hot extrusion process apparatus for production line come
Substitute cold-drawn touch specification quantity it is various deficiency --- the economic value of this method must be discussed, still more the brill of deep and long hole, include
Equipment investment volume in hole is not also small.
A scheme is also disclosed in above-mentioned patent：Pipe deformation is pushed using roller type cold bending, by welded pipe or seamless steel
The method that pipe is processed into steel tubes, the patent also give early development input greatly, and as found in debugging process, production line is set
Need to redesign processing roll again when counting unreasonable, the waste of the resources such as manpower and materials can be caused, make production cost increased
Conclusion.
The content of the invention
For overcome the deficiencies in the prior art, when defect will not be found in debugging process it is an object of the invention to provide one kind
Generation redesigns processing roll problem again, economical, safety, low cost, the rolling manufacture of the special-shaped seamless steel pipe of short time limit
Method, combined using heat rolling and cold rolling, or the finishing on surface is individually realized using cold rolling production special-shaped seamless steel pipe
Processing, can obtain very high surface roughness precision, while improve the case hardness of steel pipe surfaces externally and internally, wearability and antifatigue
Intensity, the surface quality of part may finally be improved.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of rolling manufacture method of special-shaped seamless steel pipe, the manufacture of special-shaped seamless steel pipe is directly realized using cold rolling,
Specifically include following processing step：
Raw material → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat treatment → aligning → mark → storage；
Heat rolling is first carried out to obtain the special-shaped seamless steel tube blank of progress cold rolling under normal temperature, is then compacted using cold breakdown
The manufacture of existing special-shaped seamless steel pipe, specifically includes following processing step：
At raw material → heating → hot rolling → annealing → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat
Reason → aligning → mark → storage.
The heat, which rolls, is：Raw material is when being heated to 1160~1300 DEG C, under the extruding of rolling tools, meanwhile, raw material
Plug mold is set in endoporus, and rolling tools position relative with plug mold keeps immobilizing, i.e., is altered without radial-play, without axial direction
It is dynamic；Plug mold is hierarchy, and radial contraction and swell, the radial stroke of harmomegathus is to can ensure that rolling and processing
Afterwards, after plug mold undergauge can not scratch finished product special-shaped seamless pipe bore area, it be principle smoothly to extract out, rolling tools for
Raw material outer surface coordinates with the plug mold in endoporus carries out roll forming.
The cold rolling is：The plastic deformation of metal is utilized at normal temperatures so that raw material is under the extruding of rolling tools, together
When, plug mold is set in raw material endoporus, rolling tools position holding relative with plug mold immobilizes, i.e., without radial-play,
Without axial float；Plug mold is hierarchy, and to carry out radial contraction and swell, the radial stroke of harmomegathus is rolled with can ensure that
After pressure processing, after plug mold undergauge can not scratch finished product special-shaped seamless pipe bore area, it is principle smoothly to extract out, rolling tools
Coordinate for the plug mold in raw material outer surface and endoporus and carry out roll forming.
Described rolling tools include roller, and roller is axially arranged along plug mold, the amount of feeding S=of rolling and processing
0.035~0.1mm；The front and rear raw materials size tolerance of rolling is calculated by diameter reduces 10~15%；Rolling and processing speed control exists
35~40m/min.
Described roller is along the row of axially arranged 1 row of plug mold~3.
Described roller is ball, cylindrical rollers or conical roller, described ball R=3~5mm.
Plug mold size used by the plug mold size that heat rolling uses is less than with cold rolling.
The wall shape and the shape of raw material endoporus of the plug mold match.
By controlling the shape of the plug mold used in the seamless pipe orifice of cold rolling by cold rolling hollow forging and the abnormal shape
The ratio between cross-sectional area of seamless steel pipe is controlled 1.01~1.045.
The raw material is finished product seamless steel pipe, seamless pipe semi-finished product, seamless pipe blank, welded still pipe or waste pipe.
Compared with prior art, the beneficial effects of the invention are as follows：
Optimized process flow, manufacturing for special-shaped seamless steel pipe is not realized with being limited by raw material.Utilize rolling tools, plug
Mold carries out the technology mode that heat rolling is combined with cold rolling or individually carries out cold rolling, has easy to implement, high yield rate
Advantage.Meanwhile, it is capable to flexible combination installation, and the precision of installation can be controlled as needed.Using multiple product as raw material,
Greatly reduce the construction cost of production line.If general seamless steel pipe finished product is to the special product of some shapes, it has not been convenient to
As raw material, rolling technology is welded into seamless steel pipe as raw material again after steel plate can also be rolled in itself, ensure that rolling
Continuous production process.
Brief description of the drawings
Fig. 1 is the process chart that heat rolling is combined with cold rolling.
Fig. 2 is the finished product cross-sectional view of the special-shaped seamless steel pipe of embodiment one.
Fig. 3 is the special-shaped seamless steel pipe schematic cross-section shaped using ball of embodiment one.
Fig. 4 is that embodiment one utilizes ball or the special-shaped seamless steel pipe manufacturing process structural representation of roll forming.
When Fig. 5 is the special-shaped seamless steel pipe ball or roll forming of embodiment one, ball or roller are vertically by feeding
Measure the schematic diagram being arranged in order.
Fig. 6 is the plug mold working state figure of embodiment one.
In figure：1- special-shaped seamless steel pipe 2- roller 3- connecting shaft 4- support 5- axle 6- slideway 7- stroke dogs
8- fanning strip 9- wedge 10- hydraulic cylinder 11- mandrels.
Embodiment
The present invention is described in detail with reference to Figure of description, it should be noted that the implementation of the present invention is unlimited
In following embodiment.
See Fig. 1-Fig. 6, a kind of rolling manufacture method of special-shaped seamless steel pipe, directly realize special-shaped seamless steel using cold rolling
The manufacture of pipe, specifically include following processing step：
Raw material → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat treatment → aligning → mark → storage；
Heat rolling is first carried out to obtain the special-shaped seamless steel tube blank of progress cold rolling under normal temperature, is then compacted using cold breakdown
The manufacture of existing special-shaped seamless steel pipe, specifically includes following processing step：
At raw material → heating → hot rolling → annealing → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat
Reason → aligning → mark → storage.
Wherein, raw material is finished product seamless steel pipe, seamless pipe semi-finished product, seamless pipe blank, welded still pipe or waste pipe.Only
It is special in cross sectional shape, when have to require that special offer meets the initial waste pipe of the shape special cross-section processing technology requirement
Non- finished product seamless steel pipe or welded still pipe are used again, or the semi-finished product of seamless steel pipe --- waste pipe is as raw material.
Hot rolling step is：Raw material is when being heated to 1160~1300 DEG C, under the extruding of rolling tools, meanwhile, raw material
Plug mold is set in endoporus, and rolling tools position relative with plug mold keeps immobilizing, i.e., is altered without radial-play, without axial direction
It is dynamic；Plug mold is hierarchy, and radial contraction and swell, the radial stroke of harmomegathus is to can ensure that rolling and processing
Afterwards, after plug mold undergauge can not scratch finished product special-shaped seamless pipe bore area, it be principle smoothly to extract out, rolling tools for
Raw material outer surface coordinates with the plug mold in endoporus carries out roll forming.
Annealing refer to heat the material to higher than Ac1 and Ac3 temperature (actual temp depending on material, its parameter model
The standard enclosed is provided by composition of raw material design scientific research department), insulation, rear Slow cooling, to obtain the tissue of stable state,
The plasticity of steel is improved, so that cold rolling is processed.
Flaw detection step is that the hollow forging of cooling roll forming carries out flaw detection processing, and cold rolling forming step only closes to flaw detection
It is molded that the hollow forging of the cooling roll forming of lattice carries out cold breakdown.Flaw detection step is set to improve product qualification rate.
Cold rolling pre-treatment step includes：To annealed processing after step of detecting a flaw and before cold rolling forming step
Raw material afterwards carry out pickling, take the lead, phosphatization, saponification, baking drying.Cold rolling pre-treatment step is set to reduce plug tire
The abrasion of tool and rolling tools (roller 2) and further raising product qualification rate.
Cold rolling step is：The plastic deformation of metal is utilized at normal temperatures so that raw material is under the extruding of rolling tools, together
When, plug mold is set in raw material endoporus, rolling tools position holding relative with plug mold immobilizes, i.e., without radial-play,
Without axial float；Plug mold is hierarchy, and to carry out radial contraction and swell, the radial stroke of harmomegathus is rolled with can ensure that
After pressure processing, after plug mold undergauge can not scratch finished product special-shaped seamless pipe bore area, it is principle smoothly to extract out, rolling tools
Coordinate for the plug mold in raw material outer surface and endoporus and carry out roll forming.
Wherein, plug mold size used by the plug mold size that heat rolling uses is less than with cold rolling, the size
Refer mainly to the external diameter of plug mold.
Rolling tools include roller 2, and roller 2 is axially arranged along plug mold, and the diameter of roller 2 is bigger, roller contact workpiece
Surface area is bigger, and plastic deformation is insufficient；When the diameter of roller 2 and too small arc radius (i.e. ball bearing radius), processing table can be given
Impression is stayed in face, practice have shown that：Diameter D=11~14mm, the ball R=3~5mm that three rollers 2 work, are optimum size, rolling
Press amount of feeding S=0.035~0.1mm (0.1~0.3mm/r, the i.e. radial feeds of roller 2 in production) of processing；Before and after rolling
Raw materials size tolerance by diameter calculate reduce 10~15%；Rolling and processing speed control is in 35~40m/min.Roller 2 is rolling
Pearl, cylindrical rollers or conical roller, preferably ball or roller 2, whole rolling work can be reduced by the use of ball as deformation element
Has cost.And the precision of ball is high, hardness is high, and small with work piece interface, with less rolling power, the less magnitude of interference can obtain
Obtain higher pressure, less roughness.And the service life length of ball, it is not easy to wear, it is cheap, easily change.Roller 2
Along the row of axially arranged 1 row of plug mold~3, Fig. 3 show 3 rows.
The wall shape and the shape of raw material endoporus of plug mold match.Used by controlling in the seamless pipe orifice of cold rolling
Plug mold shape, by the control of the ratio between cross-sectional area of cold rolling hollow forging and special-shaped seamless steel pipe 1 1.01~1.045；
If the ratio is excessive, during cold rolling, the shape of special-shaped seamless steel pipe 1 is difficult to control, and easily produces inhomogeneous deformation.
It is heat-treated as at least one of annealing, normalizing, tempering, quenching, quenched, thermo-chemical treatment or solution treatment.Should
Heat treatment step is to be further able to meet the quality requirement of different product.
Straightening step is the special-shaped seamless steel pipe 1 after molded using the aligning cold breakdown of camber anvil head, in straightening process, is adopted
The purpose aligned with camber anvil head is in order that the flexibility of special-shaped seamless steel pipe 1 after cold breakdown is molded and cross section meet skill
Art requirement.
In addition to above-mentioned raw materials, with the development with rapid changepl. never-ending changes and improvements of science and technology, raw material sources can also be by 3D printing skill
The raw material that art provides.(therefrom the research institute of ship heavy industry the 705th learns for August in 2015 2 days：Direct metal laser sintering forming technique
It is the jewel on 3D printing technique field crown.For the technology because directly being deposited with lf metal dust, structural member is fine and close
Degree is up to more than 99%, close to the material idiosome of forging.Mainly manufacture high primary structure member and biography using the technology in the world at present
The shaping of complex component, irregular element that system technique can not process, it can reach the 90% of same trade mark metal maximum intensity to
95%, there is the characteristics of precision is high, shaping limitation is few, be widely used in the fields such as high-end precision parts manufacture).
Embodiment one
Come that the invention will be further elaborated below in conjunction with a kind of specific example of applying of three valves type seamless steel pipe, but this hair
Bright not limited to this, other special-shaped seamless steel pipes 1：Such as square-outside and round-inside, hexangle type, square, octagon, semicircle, inequilateral hexagonal
Shape, melon seeds shape steel tubes etc., it is only necessary to which the shape for changing corresponding hot rolling forging die and cold breakdown pressing mold can be achieved.
Using above-mentioned manufacture method, the special-shaped seamless steel pipe 1 shown in Fig. 1 is produced, is specifically manufactured using following steps：
The source of raw material can also use the special-shaped seamless pipe of welding fabrication after the rolling of plate shape raw material in addition to above-mentioned raw materials.
Heat rolling, the plug mold of use leaves surplus to cold rolling, i.e., raw material pipe is heated into 1200 DEG C, then interior
Hole uses plug mold, it is outside with ball or rolling wheel come extruding raw material pipe, to determine the raw material external diameter of cooling rolling, obtain
(quantity in the axial direction of roller 2 can also be 1,2 to cooling rolling raw material...5 etc., roller 2 same
Along the circumferential direction the quantity in (radial direction) can also be 1,2 on axial location...5 etc., the shape of roller 2 can be
Various patterns, the shape are determined by the profile of product)；
The pressure form of each roller 2 can be divided into screw machine pressure and hydraulic pressing, can also electric transmission pressure, it is electro-hydraulic
Mixed drive pressure etc..Cost is relatively low under machinery pressure, and hydraulic pressing is easy to operate (being controlled by PLC).The kind of drive is universal
Joint, adjusting range can be with larger, for ease of the replacing of rolling wheel, and outer side frame and bottom plate are mostly turnover hinge connection.
When pressure form uses hydraulic pressing, the rolling wheel arranged on the circumferencial direction (radial direction) on same axial location,
If the radially even distribution of rolling wheel, it, which depresses force hydraulic cylinder, can be connected into its hydraulic oil pipeline one entirety
Coupling ring, it is possible to realize the rolling wheel of radially even distribution while press, automatic centering；Processed special-shaped seamless pipe or
Pipe uniform force, accuracy of alignment are high.
See Fig. 4, rolling tools (heat rolling, cold rolling adopt the structure) include support 4, axle 5, slideway 6, stroke
Block 7, connecting shaft 3, roller 2, support 4 are fixedly connected with axle 5, and support 4 is slidably connected with slideway 6, and support 4 is provided with
Connecting shaft 3, the radial equipartition of roller 2 drive roller 2 to be rotated around connecting shaft 3 in the surrounding of connecting shaft 3, connecting shaft 3, the position of connecting shaft 3
Put and limited by stroke dog 7；Support 4 promotes under the drive of axle 5 along slideway 6 to raw material outer wall.On slideway 6, the pressure of axle 5
Feather key or guide runner can be arranged as required on driving piston rod, also can thereon or other suitable opening positions are set
The adjustable stroke dog 7 in position.
During heat rolling, plug mold is set, rolling tools position relative with plug mold keeps immobilizing in raw material endoporus
(do not allow circumferential vibration, also mustn't axial motion), plug mold be layering, radial contraction can be carried out and swell (it rises
After the radial stroke of contracting is can ensure that rolling and processing, after plug mold undergauge can not scratch finished product special-shaped seamless pipe bore area,
Smoothly extraction is principle to design), plug mold of the rolling tools in raw material outer surface and endoporus coordinates --- rolled
It is molded.
Plug mold is had a great influence to finished product, and precision can be determined by product demand, if not having to plug mold with regard to energy
Produce that precision is not high, but can meet that plug mold can not be had to during the product of the requirement of user；But if user pays close attention to
Be Product Precision, it is higher to cost can also receive if, 3D printing technique can be used to provide, and external diameter is small, is layered more cores
Rod mold.
See Fig. 4, Fig. 6, plug mold includes mandrel 11, wedge 9, the three-decker of fanning strip 8, wedge 9, sector from inside to outside
Plate 8 is radially three-clove style structure (quantity of valve depends on the groove number to be processed, identical with the groove number to be processed),
Outline is zigzag to wedge 9 vertically, and Internal periphery matches fanning strip 8 with the outline of wedge 9 vertically, outside fanning strip 8
Arc shape matches with being intended to the raw material endoporus shape of hole wall of rolling and processing；During work, driven by hydraulic system (hydraulic cylinder 10)
Wedge 9 axially movable, makes the internal diameter of wedge 9 be moved along mandrel 11, and external diameter drives the radial direction fortune that fanning strip 8 is shunk and swelled
Dynamic, Fig. 6 is schematic diagram when rising by footpath.
Heat rolling can also produce the abnormal shape that cold-drawing technology produces the spiral groove of very difficult (or even can not produce)
Seamless steel pipe 1：If rolling tools keep reliable spiralling with plug mold relative position, with regard to spiral shape can be rolled out
Groove, and this relative position keeps reliable spiralling (realization of screw is mature technology, be will not be described here).
Then made annealing treatment successively, roll straightening, flaw detection processing, to detecting a flaw, qualified cooling rolling hollow forging enters successively
Row pickling, take the lead, phosphatization, saponification, baking dry etc. cold rolling pre-treatment.
Cold rolling forming processes are carried out after cold rolling pre-treatment, are the plastic deformations for utilizing metal at normal temperatures so that place
Raw material after reason is under the extruding of rolling tools, and plug mold carries out radial contraction and swelled inside raw material, and rolling tools exist
Raw material outer surface coordinates with the plug mold in endoporus --- carry out roll forming.
The quantity for the roller 2 that rolling tools are in axial direction above set is arranged to 3 rows, ball diameter D=12mm, R=4mm
When, rolling feed S=0.065mm, 10~15% can be reduced by rolling front and rear dimensional tolerance and being calculated by diameter, rolling speed control
System is in 37m/min.
Molded cold breakdown is a kind of section material, energy-conservation, efficient metal forming new technology, new technology.In the molded mistake of cold breakdown
There was only flexural deformation in journey, in addition to blank angle of bend locally has slight be thinned, the thickness of deformable material is kept in forming process
It is constant.The processing of this processing method high-precision product larger particularly suitable for profile lengthwise, batch.Many can be gone out with rolling
The product that wall is thin, light, rigidity is big and section configuration is complicated.
According to actual conditions, heat treatment step can not also be set.
The molded process characteristic of cold breakdown：
1) production efficiency is high, is suitable for producing in enormous quantities
2) length of converted products is substantially unrestricted；
3) Product Precision is high, and uniformity is good；
4) surface quality of product is good；
5) other secondary process processes, such as online punching, impressing, welding, riveting can be integrated on roll forming production line
Connect；
6) material 20%~30% or so can be saved compared with Sheet Metal Forming Technology；.
7) it is applied to the shaping of high-strength steel；
8) equipment investment is low, and it is convenient that product is changed after mold exchange；
9) section complicated can not be substituted to punching press.
The clamping technique of ball has many methods, for example the support 4 of waste and old bearing taken back slightly to the transformation of the way can be real
It is existing, therefore the embodiment only refers to.
See Fig. 4, can also be by the way of roller 2, outside roller 2 if the needs of manufacture can not be met using ball
Circle is toroidal, and the global shape of roller 2 is a disc-shape；Roller 2 rotates (bearing is not shown) in connection, even
Spindle 3 is fixed on support 4, and support 4 is coupled by axle 5 with hydraulic cylinder, and axle 5 slides in slideway 6, stroke dog 7
Put adjustable.
See Fig. 5, roller 2 can be multiple passages for heat rolling on the special-shaped seamless pipe axial direction processed
(shown in Fig. 5 is 5 passages), the roller 2 in each passage, depression stroke can be allocated by the regulation of technological procedure,
The source of technological parameter can be existing design data or according to field experiment and Analog Reasoning etc..Roller 2 exists
On the special-shaped seamless pipe axial direction processed, for cold rolling, it is preferred with 1 passage, at most should not be each more than 3
The depression stroke of roller 2 can be allocated by the regulation of technological procedure, and the source of technological parameter can be existing design money
Expect or according to field experiment and Analog Reasoning etc..
Claims (10)
1. a kind of rolling manufacture method of special-shaped seamless steel pipe, it is characterised in that directly realize special-shaped seamless steel using cold rolling
The manufacture of pipe, specifically include following processing step：
Raw material → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat treatment → aligning → mark → storage；
Heat rolling is first carried out to obtain the special-shaped seamless steel tube blank of progress cold rolling under normal temperature, is then realized using cold rolling different
The manufacture of type seamless steel pipe, specifically include following processing step：
Raw material → heating → hot rolling → annealing → roll straightening → flaw detection → cold rolling pre-treatment → cold rolling → heat treatment →
Aligning → mark → storage.
A kind of 2. rolling manufacture method of special-shaped seamless steel pipe according to claim 1, it is characterised in that the heat rolling
For：Raw material is when being heated to 1160~1300 DEG C, under the extruding of rolling tools, meanwhile, plug mold is set in raw material endoporus,
Rolling tools position relative with plug mold keeps immobilizing, i.e., without radial-play, without axial float；Plug mold is layering knot
Structure,, can not after plug mold undergauge after the radial stroke of harmomegathus is can ensure that rolling and processing radial contraction and swell
Scratch finished product special-shaped seamless pipe bore area, it is principle smoothly to extract out, and rolling tools are used in raw material outer surface and endoporus
Plug mold, which coordinates, carries out roll forming.
A kind of 3. rolling manufacture method of special-shaped seamless steel pipe according to claim 1, it is characterised in that the cold rolling
For：At normal temperatures utilize metal plastic deformation so that raw material under the extruding of rolling tools, meanwhile, set in raw material endoporus
Plug mold, rolling tools position relative with plug mold keeps immobilizing, i.e., without radial-play, without axial float；Plug tire
Tool is hierarchy, radial contraction and swell, after the radial stroke of harmomegathus is can ensure that rolling and processing, and plug mold
After undergauge can not scratch finished product special-shaped seamless pipe bore area, it be principle smoothly to extract out, and rolling tools are in raw material outer surface
Coordinate with the plug mold in endoporus and carry out roll forming.
4. the rolling manufacture method of a kind of special-shaped seamless steel pipe according to Claims 2 or 3, it is characterised in that described
Rolling tools include roller, and roller is axially arranged along plug mold, amount of feeding S=0.035~0.1mm of rolling and processing；Rolling
Front and rear raw materials size tolerance is calculated by diameter reduces 10~15%；Rolling and processing speed control is in 35~40m/min.
A kind of 5. rolling manufacture method of special-shaped seamless steel pipe according to claim 4, it is characterised in that described roller
Along the row of axially arranged 1 row of plug mold~3.
A kind of 6. rolling manufacture method of special-shaped seamless steel pipe according to claim 4, it is characterised in that described roller
For ball, cylindrical rollers or conical roller, described ball R=3~5mm.
7. the rolling manufacture method of a kind of special-shaped seamless steel pipe according to claim 3, it is characterised in that heat rolling uses
Plug mold size be less than with cold rolling used by plug mold size.
A kind of 8. rolling manufacture method of special-shaped seamless steel pipe according to Claims 2 or 3, it is characterised in that the core
The wall shape and the shape of raw material endoporus of rod mold match.
9. the rolling manufacture method of a kind of special-shaped seamless steel pipe according to claim 1, it is characterised in that cold by controlling
The shape of the plug mold used in seamless pipe orifice is rolled by cold rolling hollow forging and the cross-sectional area of the special-shaped seamless steel pipe
The ratio between control 1.01~1.045.
A kind of 10. rolling manufacture method of special-shaped seamless steel pipe according to claim 1, it is characterised in that the raw material
For finished product seamless steel pipe, seamless pipe semi-finished product, seamless pipe blank, welded still pipe or waste pipe.
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| TWI712488B (en) * | 2019-12-06 | 2020-12-11 | 財團法人金屬工業研究發展中心 | Manufacturing device and method of thermoplastic composite pipe |
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| CN115518999A (en) * | 2022-11-24 | 2022-12-27 | 西安西部新锆科技股份有限公司 | Preparation method of zirconium or zirconium alloy thin-wall square tube |
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| CN110397218A (en) * | 2019-08-15 | 2019-11-01 | 任自放 | The building enclosure of assembled architecture and the steel pipe column used and steel pipe column processing technology |
| CN110397216A (en) * | 2019-08-15 | 2019-11-01 | 任自放 | Hot rolled seamless steel tube beam and connecting node and its processing technology |
| TWI712488B (en) * | 2019-12-06 | 2020-12-11 | 財團法人金屬工業研究發展中心 | Manufacturing device and method of thermoplastic composite pipe |
| CN111020132A (en) * | 2019-12-25 | 2020-04-17 | 常熟市异型钢管有限公司 | Preparation method of special-shaped steel |
| CN111020132B (en) * | 2019-12-25 | 2021-08-27 | 常熟市异型钢管有限公司 | Preparation method of special-shaped steel |
| CN112496065A (en) * | 2020-11-14 | 2021-03-16 | 湖南文理学院 | Extrusion conveying device for manufacturing special pipe |
| CN113941643A (en) * | 2021-10-15 | 2022-01-18 | 惠州市协同兴实业有限公司 | Hardware profile forming method and device |
| CN113941643B (en) * | 2021-10-15 | 2024-06-11 | 佛山市弘昇精密五金制品有限公司 | Hardware profile forming method and device |
| CN114260327A (en) * | 2021-12-20 | 2022-04-01 | 大连理工大学 | Method for preparing axial variable cross-section pipe by radial continuous extrusion |
| CN114260327B (en) * | 2021-12-20 | 2022-08-30 | 大连理工大学 | Method for preparing axial variable cross-section pipe by radial continuous extrusion |
| CN115518999A (en) * | 2022-11-24 | 2022-12-27 | 西安西部新锆科技股份有限公司 | Preparation method of zirconium or zirconium alloy thin-wall square tube |
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