CN102430894A - Process for continuously rolling pipeline without causing pressure head - Google Patents
Process for continuously rolling pipeline without causing pressure head Download PDFInfo
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- CN102430894A CN102430894A CN2011102978424A CN201110297842A CN102430894A CN 102430894 A CN102430894 A CN 102430894A CN 2011102978424 A CN2011102978424 A CN 2011102978424A CN 201110297842 A CN201110297842 A CN 201110297842A CN 102430894 A CN102430894 A CN 102430894A
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Abstract
The invention provides a process for continuously rolling a pipeline without causing a pressure head, comprising the following steps: arranging prebent arc-shaped tyre templates on two lower shaft rollers of a plate reeling machine with three shaft rollers; inserting the end of a workpiece to be rolled between the arc-shaped tyre templates and upper shaft roller of the plate reeling machine with three shaft rollers so that the plate reeling machine with three shaft rollers rolls back and forth and the end part of the workpiece to be rolled is prebent; inserting the prebent workpiece to be rolled into the plate reeling machine with three shaft rollers, and bending the prebent workpiece to be rolled repeatedly, wherein the plate reeling machine with three shaft rollers is not provided with an arc-shaped tyre template; taking down the prebent workpiece to be rolled from the plate reeling machine with three shaft rollers, and welding the end part of the workpiece; and rolling the welded workpiece by using the plate reeling machine with three shaft rollers and no arc-shaped tyre template so as to obtain the expected molded workpiece. Due to the adoption of the process, the engineering cost can be reduced, and the labor intensity can be reduced to the lowest level. The process has obvious social and economic benefits.
Description
Technical field
The present invention relates to metallurgical pipeline and roll technical field, especially relate to and a kind of the pachydermia pipe is not had the technology that pressure head rolls continuously.
Background technology
Conventional pipeline rolling technology need utilize electric welding will roll the steel plate spreading in advance before the top roll bed or directly reserves the residual straightway of b/2 (b is the spacing of two rollers) usually rolling steel plate in advance, guarantees the precompressed arc quality in preparatory pipe crimping road thus.After pressing arc, utilize gas cutting that residual straightway is removed.This shows that conventional pipeline rolling technology has caused the waste of material, thereby cause cost to increase, need extra manual work in addition, thereby labour cost is high, and labour intensity is big.
Therefore, need to explore a kind of new pipeline rolling technology,, construction cost is minimized, improve productivity effect, and reduce labour intensity to practice thrift the steel plate feed.
Summary of the invention
The invention provides a kind of pipeline does not have the continuous rolling technology of pressure head, and said technology comprises the steps: on two lower rollers of three beaming roller veneer reeling machines, to place curved in advance good arc loose tool plate; With waiting that the end that rolls workpiece is inserted between the last beaming roller and arc loose tool plate of three beaming roller veneer reeling machines, makes the positive and negative rolling of three beaming roller veneer reeling machines, will wait to roll the end pre-bending of workpiece; The workpiece to be rolled of pre-bending is inserted in the three beaming roller veneer reeling machines that arc loose tool plate is not set, then pre-bending is waited that rolling workpiece carries out bending times without number; Workpiece after the bending is taken off from three beaming roller veneer reeling machines, the end of workpiece is welded; Utilize the workpiece after the three beaming roller veneer reeling machines that arc loose tool plate is not set will weld to roll processing again, thus the shaping workpiece that obtains expecting.
Said technology can also comprise the steps: said shaping workpiece is spliced, to reach predetermined length.
The width of arc loose tool plate can be a twice of waiting to roll the width of workpiece.
In addition, can wait to roll workpiece along the predetermined welding allowance for shrinkage of circumferential direction reservation with said, preferably, said welding allowance for shrinkage is 2mm to 3mm.
Preferably, can adopt manual electric arc welding that the end of said workpiece is welded.
Description of drawings
Fig. 1 shows the sketch map that pipeline according to the present invention does not have the pre-bending process of the continuous rolling technology of pressure head;
Fig. 2 shows pipeline according to the present invention and does not have the sketch map of the workpiece after the bending of the continuous rolling technology of pressure head;
Fig. 3 shows the sketch map that pipeline according to the present invention does not have the shaping workpiece that the continuous rolling technology of pressure head obtains.
The specific embodiment
Pipeline according to the present invention does not have the continuous rolling technology of pressure head and comprises the steps: on two lower rollers of three beaming roller veneer reeling machines, to place curved in advance good arc loose tool plate; With waiting that the end that rolls workpiece is inserted between the last beaming roller and arc loose tool plate of three beaming roller veneer reeling machines, makes the positive and negative rolling of three beaming roller veneer reeling machines, will wait to roll the end pre-bending of workpiece; The workpiece to be rolled of pre-bending is inserted in the three beaming roller veneer reeling machines that arc loose tool plate is not set, then pre-bending is waited that rolling workpiece carries out bending times without number; Workpiece after the bending is taken off from three beaming roller veneer reeling machines, the end of workpiece is welded; Utilize the workpiece after the three beaming roller veneer reeling machines that arc loose tool plate is not set will weld to roll processing again, thus the shaping workpiece that obtains expecting.
Said technology can also comprise the steps: a plurality of shaping workpieces that obtain are spliced, to reach length predetermined or expectation.
The width of arc loose tool plate can be a twice of waiting to roll the width of workpiece.
In addition, can wait to roll workpiece along the predetermined welding allowance for shrinkage of circumferential direction reservation with said, preferably, said welding allowance for shrinkage is 2mm to 3mm.
Preferably, can adopt manual electric arc welding that the end of said workpiece is welded.
To combine concrete example that pipeline of the present invention is not had the continuous rolling technology of pressure head below is elaborated.
Roll in the process at pipeline, high to making required precision, and need strict control number material, operation such as cut, roll, could guarantee the pipe crimping fabricating quality thus.
According to the feed situation, rationally arrange batching, guarantee that the longitudinal seam on the same joint pipe crimping must not be greater than twice, two longitudinal joint spacings should not be less than 200mm.
In order to ensure the pipe crimping perimeter dimension, can be with waiting that rolling workpiece reserves predetermined welding allowance for shrinkage along circumferential direction, preferably, the welding allowance for shrinkage is 2～3mm.
Before rolling, when carrying out model number material, need indicate inspection line and center line, with the inspection cut quality with satisfy the assembling requirement.
Because the present invention adopts the continuous rolling technology of no pressure head,, particularly,,, and need not set the length of pressure head in the present invention according to 1: 1 scale lofting expansion according to design pipeline girth so can carry out the dead size blanking.
In addition, in order to guarantee cut quality, sheet material and groove all adopt the pattern semi auto cutting machine, so that cutting accuracy conforms to quality requirements fully.
When the pipe crimping diameter greater than 600mm, and wall thickness should carry out back cover at the root of weld of inside tube, to guarantee the welding quality of pipeline during greater than 6mm.
Example
As shown in Figure 1; Go up at two lower rollers 1 and 1 ' of three beaming roller veneer reeling machines and to place curved in advance good arc loose tool plate 2, preferably, the width of arc loose tool plate 2 rolls steel plate 3 (promptly for waiting; The twice of width workpiece), and the length of arc loose tool plate 2 is than the length weak point of waiting to roll steel plate 3.
With reference to Fig. 1, with waiting that the end that rolls workpiece 3 is inserted between the last beaming roller 4 and arc loose tool plate 2 of three beaming roller veneer reeling machines, makes the positive and negative rolling of three beaming roller veneer reeling machines, will wait to roll the end pre-bending of workpiece 3.Preferably, the internal diameter of arc loose tool plate 2 is slightly less than the external diameter of the circle that workpiece will roll into, and beaming roller is only born by the pressure of curved steel plate like this, and does not bear the pressure of arc loose tool plate 2, thus unlikely damage volume bed.
Should be more than the big 100mm of width than two lower rollers 1 of three beaming roller veneer reeling machines and 1 ' center by the arc length of curved steel plate, and on plate vertical line of picture perpendicular to the sheet material side, make the line of rabbet joint or the top roll parallel axes of vertical line and lower roll.Then, the top roll of three beaming roller veneer reeling machines of the no arc loose tool plate 2 that descends to be compressing plate, and the workpiece to be rolled (particularly, waiting to roll the mid portion of workpiece) of pre-bending is carried out bending times without number.In addition, in round as a ball process, guarantee not wanted move left and right by curved steel plate.
Then, the workpiece after the bending is taken off from three beaming roller veneer reeling machines, and the end of the workpiece after preferably adopting manual electric arc welding to bending welds, thereby obtain pipe shown in Figure 2.Certainly, also can adopt other welding manner to weld such as semiautomatic welding.In addition, as required, can welding material be dried.
In addition, when carrying out the manual welding of multilayer multiple tracks, should segmentation weld symmetrically.Before welding per pass weld seam, should carry out scarfing cinder, as finding to have defectives such as slag inclusion, pore and crackle, must remove and welding again.In order to guarantee welding quality, the longitudinal joint two ends of the pipe of the gained run-on tab of must burn-oning, run-on tab material and thickness are identical with mother metal, and specification is not less than 80mm * 50mm (long * wide).
With utilizing three beaming roller veneer reeling machines of no arc loose tool plate to roll processing after the pipeline welding moulding of pre-bending again, after the pipe of gained reaches requirement, take out, thereby obtain final shaping workpiece, as shown in Figure 3.
In addition, can the shaping workpiece that obtain be carried out the pipeline splicing, splicing length is decided according to haulage vehicle.
Pipeline of the present invention does not have the continuous rolling technology of pressure head can adopt the dead size blanking, on three beaming roller veneer reeling machines, carries out the end prebuckling earlier, and then carries out middle part volume and press, and then can weld, and rolls processing again, takes out after reaching requirement.Hence one can see that, because adopt the dead size blanking, thus saved the steel materials widely, and need not carry out the roll extrusion of pressure head end in addition or beat processing, thereby reduced manufacturing procedure, and make minimumization of labour intensity.Therefore, pipeline of the present invention does not have the continuous rolling technology of pressure head can reduce engineering cost, thereby has the significant social economic benefit.
Claims (6)
1. a pipeline does not have the continuous rolling technology of pressure head, it is characterized in that said technology comprises:
On two lower rollers of three beaming roller veneer reeling machines, place curved in advance good arc loose tool plate;
With waiting that the end that rolls workpiece is inserted between the last beaming roller and arc loose tool plate of three beaming roller veneer reeling machines, makes the positive and negative rolling of three beaming roller veneer reeling machines, will wait to roll the end pre-bending of workpiece;
The workpiece to be rolled of pre-bending is inserted in the three beaming roller veneer reeling machines that arc loose tool plate is not set, then pre-bending is waited that rolling workpiece carries out bending times without number;
Workpiece after the bending is taken off from three beaming roller veneer reeling machines, the end of workpiece is welded;
Utilize the workpiece after the three beaming roller veneer reeling machines that arc loose tool plate is not set will weld to roll processing again, thus the shaping workpiece that obtains expecting.
2. technology according to claim 1 is characterized in that, said technology also comprises: a plurality of shaping workpieces that will obtain splice, to reach predetermined length.
3. technology according to claim 1 is characterized in that, the width of arc loose tool plate is a twice of waiting to roll the width of workpiece.
4. technology according to claim 1 is characterized in that, waits to roll workpiece along the predetermined welding allowance for shrinkage of circumferential direction reservation with said.
5. technology according to claim 4 is characterized in that, said welding allowance for shrinkage is 2mm to 3mm.
6. technology according to claim 1 is characterized in that, adopts manual electric arc welding that the end of said workpiece is welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102978424A CN102430894A (en) | 2011-09-28 | 2011-09-28 | Process for continuously rolling pipeline without causing pressure head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102978424A CN102430894A (en) | 2011-09-28 | 2011-09-28 | Process for continuously rolling pipeline without causing pressure head |
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| CN102430894A true CN102430894A (en) | 2012-05-02 |
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| CN2011102978424A Pending CN102430894A (en) | 2011-09-28 | 2011-09-28 | Process for continuously rolling pipeline without causing pressure head |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542254A (en) * | 2013-10-18 | 2014-01-29 | 西安轨道交通装备有限责任公司 | External reinforcing ring device for outer tank of low-temperature pressure container and processing method |
| CN103612068A (en) * | 2012-11-27 | 2014-03-05 | 国机重工（洛阳）有限公司 | Road roller rim rolling technology |
| CN103894457A (en) * | 2012-12-28 | 2014-07-02 | 南通大通宝富风机有限公司 | Plate bending machine with pre-bending device |
| CN104339124A (en) * | 2013-08-05 | 2015-02-11 | 上海通华不锈钢压力容器工程有限公司 | Multi-curvature forming method for stainless steel cylinder |
| CN104801578A (en) * | 2015-05-21 | 2015-07-29 | 江苏一机机械科技有限公司 | Bending method for three-roller plate bending machine |
| CN108380692A (en) * | 2018-02-12 | 2018-08-10 | 湘潭市智全机械有限公司 | A kind of heavy wall stainless steel minor diameter rotary drum forming method |
| CN109047426A (en) * | 2018-07-20 | 2018-12-21 | 中国葛洲坝集团机械船舶有限公司 | A kind of tile steel plate pressure head fabricated device and method |
| CN110653296A (en) * | 2019-11-12 | 2020-01-07 | 江苏伟业铝材有限公司 | Aluminum profile arc bending die |
| CN111531332A (en) * | 2020-05-11 | 2020-08-14 | 惠州市坤豪塑胶电器制品有限公司 | Furnace end automatic production line and process thereof |
| CN111872632A (en) * | 2020-06-12 | 2020-11-03 | 中国二冶集团有限公司 | Method for manufacturing open pipeline |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612068A (en) * | 2012-11-27 | 2014-03-05 | 国机重工（洛阳）有限公司 | Road roller rim rolling technology |
| CN103894457A (en) * | 2012-12-28 | 2014-07-02 | 南通大通宝富风机有限公司 | Plate bending machine with pre-bending device |
| CN104339124A (en) * | 2013-08-05 | 2015-02-11 | 上海通华不锈钢压力容器工程有限公司 | Multi-curvature forming method for stainless steel cylinder |
| CN103542254A (en) * | 2013-10-18 | 2014-01-29 | 西安轨道交通装备有限责任公司 | External reinforcing ring device for outer tank of low-temperature pressure container and processing method |
| CN104801578A (en) * | 2015-05-21 | 2015-07-29 | 江苏一机机械科技有限公司 | Bending method for three-roller plate bending machine |
| CN108380692A (en) * | 2018-02-12 | 2018-08-10 | 湘潭市智全机械有限公司 | A kind of heavy wall stainless steel minor diameter rotary drum forming method |
| CN109047426A (en) * | 2018-07-20 | 2018-12-21 | 中国葛洲坝集团机械船舶有限公司 | A kind of tile steel plate pressure head fabricated device and method |
| CN110653296A (en) * | 2019-11-12 | 2020-01-07 | 江苏伟业铝材有限公司 | Aluminum profile arc bending die |
| CN111531332A (en) * | 2020-05-11 | 2020-08-14 | 惠州市坤豪塑胶电器制品有限公司 | Furnace end automatic production line and process thereof |
| CN111531332B (en) * | 2020-05-11 | 2021-07-23 | 惠州市坤豪塑胶电器制品有限公司 | Furnace end automatic production line and process thereof |
| CN111872632A (en) * | 2020-06-12 | 2020-11-03 | 中国二冶集团有限公司 | Method for manufacturing open pipeline |
| CN111872632B (en) * | 2020-06-12 | 2023-06-20 | 中国二冶集团有限公司 | Manufacturing method of open pipeline |
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Legal Events
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| CB02 | Change of applicant information |
Address after: 617000 No. 28, East Panzhihua Road, Sichuan, Panzhihua Applicant after: Pan'gang Group Engineering Technology Co., Ltd. Address before: 617000 No. 28, East Panzhihua Road, Sichuan, Panzhihua Applicant before: Pangang Group Metallugical Engineering Technology Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: PANGANG GROUP METALLUGICAL ENGINEERING TECHNOLOGY CO., LTD. TO: PAN'GANG GROUP ENGINEERING TECHNOLOGY CO., LTD. |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120502 |
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| WD01 | Invention patent application deemed withdrawn after publication |