CN106694611B - Steel plate rolls conical pipe method - Google Patents
Steel plate rolls conical pipe method Download PDFInfo
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- CN106694611B CN106694611B CN201611195718.6A CN201611195718A CN106694611B CN 106694611 B CN106694611 B CN 106694611B CN 201611195718 A CN201611195718 A CN 201611195718A CN 106694611 B CN106694611 B CN 106694611B
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- blanket
- taper
- conical pipe
- roll bending
- steel plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
- B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
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- Mechanical Engineering (AREA)
Abstract
The invention discloses a kind of steel plates to roll conical pipe method, comprising: 1. stop machining allowance to steel plate cutting according to electrical path length in the axial height and circumferential direction of design conical pipe；Obtain fan-shaped blanket, school shape；2. delineating roll bending allowance line and roll bending radiation in the short transverse of blanket according to design requirement；3. being handled according to the crooked radian of design the pre- roll bending in both ends end that blanket carries out length direction；Cutting process is carried out in the height direction according to pre- roll bending position of the roll bending allowance line to blanket, forms corresponding splicing groove；4. carrying out roll bending processing according to roll bending radiation, taper tubular is obtained；Corresponding splicing groove is subjected to spot welding；Welding processing is carried out to spot welding position；5. school circle processing；Welding equipment annular is distinguished on the axial ends inner wall of taper semifinished tube and supports muscle, and in the lug of the upper welding equipment clamping machine tool of the outer wall of taper semifinished tube axial direction；It is sent into the working process that lathe carries out axial ends end molded line, until finished product.
Description
Technical field
The present invention relates to the moulding process of conical metal pipe, method that specifically a kind of steel plate rolls conical pipe.
Background technique
In the design, manufacture of industrial equipment, high-intensitive, high-precision conical metal pipe (or shaped Nozzles) is as accurate
One of components, can by with and, such as shaped Nozzles on steam turbine etc..Due to the industrial equipment including including steam turbine etc.
Required components be usually high precision technology require-i.e. precision parts, in addition, the structure of conical pipe itself is special
Property, this also results in the conical pipe applied to industrial equipment, have only with the corresponding forging of particular design structure and technique into-i.e.
Forging structure.It is well known that forging molding has the technical problems such as period length, low efficiency, at high cost.
If existing high-accuracy forging structure conical pipe can be changed with high-intensitive, high-precision steel plate roll-forming,
Not only it had been able to satisfy the application technology requirement of conical pipe, but also the existing technical problem of forging conical pipe molding can be efficiently solved, i.e.,
The conical pipe that steel plate rolls should have the characteristics that high-precision, high intensity, short molding cycle, high-efficient, at low cost, economic, practical.
However, rolling non-general steel plate rolling technology institute with steel plate can be molding since conical pipe is non-equant fitting structure, if
Technological forming conical pipe is rolled using general steel plate, then the conical pipe gap of formed tapered tube configuration and design requirement is very
Far, can not be applied on industrial equipment, this is also that for a long time, conical pipe used in industrial equipment can not be rolled into always with steel plate
Where the technical bottleneck of type.
Chinese patent literature discloses entitled " processing technology of large cone steel pipe cold forming " (publication number: CN
101386041, publication date: on March 18th, 2009) technology.Although the technology discloses the technique that conical pipe is rolled with steel plate,
But the precision of the conical pipe of the technology institute roll-forming is low, the molding conical pipe of institute is simply possible to use in low to precision techniques requirement
Architectural engineering in, can not be of limited application suitable for the demanding industrial equipment of precision techniques.
Summary of the invention
Technical purpose of the invention is: for above-mentioned tapered tube configuration particularity, the technical requirements of application environment and
The deficiencies in the prior art, provide that a kind of molding is easy, shaping efficiency is high, finished product accuracy is high, economical and practical steel plate rolls taper
Pipe method.
Technical purpose of the invention is achieved through the following technical solutions, and a kind of steel plate rolls conical pipe method, including following
Step:
Step 1. carries out blanking to steel plate according to electrical path length in the axial height and circumferential direction of design conical pipe, when blanking
Machining allowance is stopped respectively on axial height direction and circumferential lengths direction；Form fan-shaped blanket；To blanket school shape；
Step 2. delineates roll bending allowance line and roll bending radiation according to design requirement on the axial height direction of blanket；
Step 3. carries out the both ends end in circumferential lengths direction to the blanket of step 2 according to the crooked radian of design requirement
Pre- roll bending processing, so that the circumferential lengths direction both ends end of blanket is respectively formed the crooked radian for meeting design requirement；According to
The roll bending allowance line that step 2 delineates, to the pre- roll bending position of blanket circumferential lengths direction both ends end on axial height direction
Cutting process is carried out, makes the bending section of blanket circumferential lengths direction both ends end that there is corresponding splicing groove；
The roll bending radiation that step 4. is delineated according to step 2 carries out roll bending processing to the blanket of step 3；Until entire base
The tapered tubular of the bending of plate gauge then；The splicing groove of the circumferential lengths direction both ends end of tubular blanket is subjected to a solid welding
It is fixed, taper base pipe is formed, radial support lacing wire is respectively set on the axial height direction both ends inner wall of taper base pipe；To cone
The spot welding splicing position of shape base pipe carries out welding processing；Back chipping, destressing, flaw detection are examined；
Step 5. removes the support lacing wire in taper base pipe；Taper base pipe is subjected to school circle processing, obtains taper semi-finished product
Pipe；Welding equipment annular is distinguished on the axial height direction both ends inner wall of taper semifinished tube and supports muscle, and in taper semifinished tube
The clamping lug of welding equipment clamping machine tool on outer wall；Taper semifinished tube is sent into lathe and carries out axial height direction both ends end
The working process of molded line, until finished product.
Preferably, when blanking in step 1, the machining allowance that circumferential lengths direction is stopped designs thickness for conical pipe
15~25 times of degree.Further, when blanking in step 1, the machining allowance that axial height direction is stopped designs for conical pipe
1/3~1 times of thickness.
Preferably, the roll bending radiation in step 2 is each Along ent of blanket miner diameter end to each Along ent of bigger diameter end
Correspondence line, the Along ent quantity of the miner diameter end of the blanket and the Along ent quantity of bigger diameter end are consistent.
Preferably, the support lacing wire in step 4 is rice font structure.
Preferably, the welding in step 4 is that welding is carried out in a manner of manual electric arc welding.
Preferably, the flaw detection in step 4, verify as magnetic powder test and/or radioscopy.
Preferably, the school circle processing in step 5 is rolling bed school circle or Manual flame school shape.
Preferably, the clamping lug in step 5 is four, this four clamping lugs be circumferentially evenly arranged on taper half at
On the outer wall of quality control.
The method have the benefit that: the above method is for the structural particularity of conical pipe and the technology of application environment
It is required that and design, not only can ensure that the high-precision brake forming of blanket ontology of forming cone shape pipe, but also can ensure that molding conical pipe
Blanket circumferential lengths direction both ends end also can high-precision brake forming, finally ensure that the molding taper base pipe of institute is high-precision
Circle is spent into, and stablizes, reliably dock, the processes such as subsequent support, welding, school circle, clamping effectively and reliably control taper
The possibility of base pipe deforms so that the formed precision in entire forming process by it is effective, reliable, be steadily precisely controlled, and then really
Having protected finished product conical pipe can form according to design requirement, and finished product accuracy is high；Moreover, entire forming process is relatively easy and holds
Easily, the period is short, high-efficient, and the forming cost for being conducive to be greatly reduced conical pipe (is particularly applied to the taper on industrial equipment
Pipe), good economy performance；In addition, the formed conical pipe of the present invention can be applied not only to the demanding industrial equipment of precision techniques
In (such as steam turbine etc.), can also be applied to require precision techniques in low other application environment (such as architectural engineering
Deng), have a wide range of application, it is practical.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of design conical pipe described in step 1 of the present invention in the axial direction (from bigger diameter end to small
Diameter end is axially overlooked).
Fig. 2 is design conical pipe described in step 1 of the present invention along the structural schematic diagram (B-B in figure that A-A is splitted and is unfolded
Path position in circumferential direction to design conical pipe).
Fig. 3 is a kind of structural schematic diagram of taper semifinished tube described in step 5 of the present invention.
Code name meaning in figure: 1-taper semifinished tube；2-small support the muscle of annular；The big support muscle of 3-annulars；4-clamping lugs.
Specific embodiment
The present invention is the method that steel plate rolls conical pipe, and technology contents of the invention are described in detail below.
The present invention includes the following steps:
Step 1. according to design conical pipe size to meet technical requirements steel plate carry out blanking, design Taper Pipe referring to
Shown in Fig. 1, there is non-equant bigger diameter end and miner diameter end；The size of the design conical pipe includes the size and circumferential direction of axial height
The size of length, wherein the size of circumferential lengths is subject to circumferential middle electrical path length；
When carrying out blanking to steel plate, it is not only considered as the ontology essence in conical pipe axial height direction and circumferential lengths direction
Object staff cun, and should consider machining allowance on this basis, i.e., it is contemplated that axial height direction and circumferential lengths direction
The machining allowance at four end edge positions, that is to say, that needs are stopped respectively on axial height direction and circumferential lengths direction to be added
Spare time amount；Referring to figure 1 and figure 2, be exactly in fact to the entire blank size of steel plate, will design Taper Pipe cut off along A-A sprawl,
And find the 1/2 of path position B-B(in circumferential direction i.e. taper thickness of pipe wall), on the basis of the area of plane of B-B, in axial height
It is subject to machining allowance on direction, is also subject to machining allowance on circumferential lengths direction；
Wherein, it is desirable that the machining allowance in circumferential lengths direction should be the 15~25 of conical pipe design thickness (such as 20mm)
Times, (i.e. machining allowance is for for example 15 times (i.e. machining allowance is 300mm), 20 times (i.e. machining allowance is 400mm) or 25 times
500mm) etc.；And the machining allowance in axial height direction is usually 1/3~1 times of conical pipe design thickness, for example 1/2
(10mm) or 1 times (20mm) etc. again；
Such blanking obtains the blanket of fan shape；
Fan-shaped blanket is put into levelling machine, the blanket of fan shape is carried out the processing of school shape such as to smooth；
Diameter of the step 2. according to design requirement, perimeter equidimension delineate roll bending surplus on the fan-shaped blanket of step 1
Line and roll bending radiation；
According to the diameter of design requirement, perimeter equidimension, production meets the design large and small diameter end inner end diameter of conical pipe respectively
Radian detection sample；
Wherein, the delineating of roll bending allowance line is, in the length direction (i.e. the circumferential lengths direction of conical pipe) of fan-shaped blanket
Both ends end, according to determining machining allowance and ontology accurate-size, by axial height direction (the i.e. blanket of design conical pipe
Width direction) delineate roll bending allowance line respectively on fan-shaped blanket；
The delineating of roll bending radiation is, according to the diameter of design conical pipe, the miner diameter end of fan-shaped blanket is carried out equally divided position
Reason is divided into continuous multiple segmental arcs according to the circular degree of design conical pipe, in general, drawing in fan-shaped blanket miner diameter end
The Along ent set out is tens, such as 50, the distance between adjacent Along ent is equal；Likewise, by fan-shaped blanket
Bigger diameter end such as carries out at point processing, it should be strongly noted that the Along ent quantity of bigger diameter end and the Along ent quantity of miner diameter end are
It is consistent, and the distance between adjacent Along ent on bigger diameter end is also equal；Then by the both ends Along ent of fan-shaped blanket by setting
The axial height direction (i.e. the width direction of blanket) of meter conical pipe is corresponding two-by-two to link together, and forms corresponding line, i.e.,
The Along ent of bigger diameter end is connected with the corresponding Along ent of miner diameter end, so that a plurality of radiation is formed on fan-shaped blanket, this
A little radiation are used for the guidance that fan-shaped blanket carries out roll bending processing on veneer reeling machine, that is, ensure fan-shaped blanket by corresponding roll bending spoke
Ray feeding veneer reeling machine make curved；
The fan-shaped blanket of step 2 is put on veneer reeling machine, according to the crooked radian of design requirement to step 2 by step 3.
Blanket carries out the pre- roll bending processing of the both ends end in circumferential lengths direction, which contains blanket length direction
End reserve machining allowance part and ontology end sections, so that the both ends end in the circumferential lengths direction of blanket be made to distinguish
Form the crooked radian (carrying out detection determination with the radian detection sample of step 2) for meeting design requirement；
According to the roll bending allowance line that step 2 delineates, cutting process is carried out to every end end in blanket circumferential lengths direction, i.e.,
Cutting process is carried out on axial height direction respectively to the pre- roll bending position of the both ends end in blanket circumferential lengths direction, thus
The crooked position of every end end in blanket circumferential lengths direction is set to form the splicing groove of bevel structure, even if blanket circumferential lengths
The both ends end crooked position in direction has mutual corresponding splicing groove, that is to say, that at the end in blanket circumferential lengths direction
After the removal of portion's machining allowance, the end in the circumferential lengths direction of blanket is still curved by design requirement, to avoid blanket
There is straight section in the end in circumferential lengths direction；
The roll bending radiation that step 4. delineates out according to step 2, the length direction both ends end that step 3 is obtained are bent
Blanket feeding veneer reeling machine in carry out roll bending processing, feeding angle should be adjusted in time by the roll bending radiation delineated on blanket
It is whole；
Until the tubular structure that entire blanket is tapered according to the bending of roll bending radiation rule；
The both ends end in the circumferential lengths direction of taper tubular blanket is drawn close in the circumferential, at this time by the circumferential direction of tubular blanket
The spot welding that the splicing groove of length direction both ends end is segmented is fixed, before spot welding is fixed and in the process, it should with step
The detection that rapid 2 radian detection sample carries out circular degree determines, to form the taper base pipe circumferentially to link together；
According to the diameter dimension of the axial ends of taper base pipe, corresponding, rice font structure support lacing wire is formed；By ruler
At the bigger diameter end inner wall in the axial height direction that very little bigger support lacing wire is radially weldingly fixed on taper base pipe, by undersized
The support lacing wire axial height direction that is radially weldingly fixed on taper base pipe miner diameter end inner wall at, the two support lacing wires are equal
Should be on the wall surface on the inside of axial end portion (position apart from corresponding end about 30~100mm, for example, 30mm, 50mm, 80mm or
100mm etc.), make that lacing wire is supported to form stable support, sizing to taper base pipe；
In a manner of manual electric arc welding, welding processing is carried out to the spot welding splicing position of taper base pipe；
Back chipping processing is carried out to the back side of the welding position of taper base pipe；
It tests processing to the welding position of taper base pipe, which is magnetic powder test；After the assay was approved, then into
Row filling welding；
Tempering is carried out to the taper base pipe after welding, to go de-stress；
Detected a flaw, examined to the taper base pipe after destressing, the flaw detection, inspection mode be that magnetic powder test and ray are examined
It tests, determines and examine qualification；
Removal is respectively cut in two support lacing wires in step 4 gained taper base pipe by step 5., and taper base pipe of polishing
Score on inner wall keeps the cutting part on taper base inside pipe wall smooth；
By taper base pipe be put into rolling bed school circle equipment on (certainly, the rolling bed school circle equipment can also use Manual flame school
Shape replacement), school circle processing is carried out to taper base pipe, to obtain taper semifinished tube 1；
According to the diameter dimension of the axial ends of taper semifinished tube 1, corresponding, ring-shaped structure annular support is formed
The bigger big support muscle 3 of annular of muscle, the i.e. annular small support muscle 2 of undersized and size；
By the miner diameter end inner wall in the radial axial height direction for being weldingly fixed on taper semifinished tube 1 of the small support muscle 2 of annular
Place, at the bigger diameter end inner wall in the radial axial height direction for being weldingly fixed on taper semifinished tube 1 of annular big support muscle 3, this
Two support muscle should all be on the wall surface on the inside of axial end portion (position apart from corresponding end about 30~100mm, for example, 30mm,
50mm, 80mm or 100mm etc.), and ensure that the inner wall of support muscle circumferential wall and taper semifinished tube forms complete face contact, make
Support muscle to taper semifinished tube 1 formed stablize support, sizing, and then control taper semifinished tube in subsequent cutting processing can
It can deformation；
The clamping lug 4 of welding equipment clamping machine tool on the outer wall of taper semifinished tube 1, clamping lug 4 totally four, they
Circumferentially it is evenly arranged on the waist outer wall of taper semifinished tube 1；
Above-mentioned taper semifinished tube 1 is sent into lathe, by lathe to the two of the axial height direction of taper semifinished tube 1
The molded line of end end is processed, machining allowance cutting removal including axial height direction both ends end etc.；
Until finished product；Removal is respectively cut in four clamping lugs that two of taper inside pipe wall are supportted muscle and outer wall, and is beaten
Correspondence score on grinding core shape inside pipe wall and outer wall keeps the correspondence cutting part on conical pipe inner and outer wall smooth；Obtain steel
Made of coiled sheet system, high-precision conical pipe.
The above specific technical solution is only to illustrate the present invention, rather than its limitations.Although referring to above-mentioned particular technique side
Invention is explained in detail for case, those skilled in the art should understand that: it still can be to above-mentioned specific
Technical solution is modified or equivalent replacement of some of the technical features；And these are modified or replaceed, and are not made
The essence of corresponding technical solution is detached from the spirit and scope of the present invention.
Claims (9)
1. a kind of steel plate rolls conical pipe method, including the following steps:
Step 1. carries out blanking to steel plate according to electrical path length in the axial height and circumferential direction of design conical pipe, in axial direction when blanking
Machining allowance is stopped respectively on short transverse and circumferential lengths direction；Form fan-shaped blanket；To blanket school shape；
Step 2. delineates roll bending allowance line and roll bending radiation according to design requirement on the axial height direction of blanket；
Step 3. carries out the pre- of the both ends end in circumferential lengths direction to the blanket of step 2 according to the crooked radian of design requirement
Roll bending processing, makes the circumferential lengths direction both ends end of blanket be respectively formed the crooked radian for meeting design requirement；According to step 2
The roll bending allowance line of delineating cuts the pre- roll bending position of blanket circumferential lengths direction both ends end on axial height direction
Processing is cut, makes the bending section of blanket circumferential lengths direction both ends end that there is corresponding splicing groove；
The roll bending radiation that step 4. is delineated according to step 2 carries out roll bending processing to the blanket of step 3；Until entire blanket is advised
The tapered tubular of bending then；The splicing groove of the circumferential lengths direction both ends end of tubular blanket is carried out spot welding to fix,
Taper base pipe is formed, radial support lacing wire is respectively set on the axial height direction both ends inner wall of taper base pipe；To taper
The spot welding splicing position of base pipe carries out welding processing；Back chipping, destressing, flaw detection are examined；
Step 5. removes the support lacing wire in taper base pipe；Taper base pipe is subjected to school circle processing, obtains taper semifinished tube；?
Welding equipment annular is distinguished on the axial height direction both ends inner wall of taper semifinished tube and supports muscle, and on the outer wall of taper semifinished tube
The clamping lug of welding equipment clamping machine tool；Taper semifinished tube is sent into lathe and carries out axial height direction both ends end molded line
Working process, until finished product.
2. steel plate rolls conical pipe method according to claim 1, it is characterised in that: when blanking in step 1, circumferential lengths
The machining allowance that direction is stopped is 15~25 times of conical pipe design thickness.
3. steel plate according to claim 1 or claim 2 rolls conical pipe method, it is characterised in that: axial when blanking in step 1
The machining allowance that short transverse is stopped is 1/3~1 times of conical pipe design thickness.
4. steel plate rolls conical pipe method according to claim 1, it is characterised in that: the roll bending radiation in step 2 is base
Correspondence line of each Along ent of plate miner diameter end to each Along ent of bigger diameter end, the Along ent quantity and major diameter of the miner diameter end of the blanket
The Along ent quantity at end is consistent.
5. steel plate rolls conical pipe method according to claim 1, it is characterised in that: the support lacing wire in step 4 is rice word
Type structure.
6. steel plate rolls conical pipe method according to claim 1, it is characterised in that: the welding in step 4 is with manual electricity
The mode of arc-welding carries out welding.
7. steel plate rolls conical pipe method according to claim 1, it is characterised in that: flaw detection in step 4 verifies as magnetic powder
Inspection and/or radioscopy.
8. steel plate rolls conical pipe method according to claim 1, it is characterised in that: the school circle processing in step 5 is rolling bed
School circle or Manual flame school shape.
9. steel plate rolls conical pipe method according to claim 1, it is characterised in that: the clamping lug in step 5 is four,
This four clamping lugs are circumferentially evenly arranged on the outer wall of taper semifinished tube.
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| CN201611195718.6A CN106694611B (en) | 2016-12-22 | 2016-12-22 | Steel plate rolls conical pipe method |
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| CN201611195718.6A CN106694611B (en) | 2016-12-22 | 2016-12-22 | Steel plate rolls conical pipe method |
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| CN110216416A (en) * | 2019-04-10 | 2019-09-10 | 哈尔滨锅炉厂有限责任公司 | Bearing device conical pipe circumferential weld groove manufacturing method |
| CN113020901B (en) * | 2021-02-02 | 2022-12-30 | 中交三航(南通)海洋工程有限公司 | Steel plate splicing construction process for large-diameter variable-diameter section steel pipe pile |
| CN113843532B (en) * | 2021-10-28 | 2023-08-15 | 武昌工学院 | Screening cylinder manufacturing process system based on robot laser cutting and working method |
| CN115740987A (en) * | 2022-12-06 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Preparation method of high-precision fin-shaped thin-wall special-shaped part for gas turbine |
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