CN203409470U - Pre-weld reshaping aid for large-sized steel cylinder - Google Patents
Pre-weld reshaping aid for large-sized steel cylinder Download PDFInfo
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- CN203409470U CN203409470U CN201320133390.0U CN201320133390U CN203409470U CN 203409470 U CN203409470 U CN 203409470U CN 201320133390 U CN201320133390 U CN 201320133390U CN 203409470 U CN203409470 U CN 203409470U
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Abstract
The utility model relates to the field of molding, assembling and welding technologies for large-sized support cylinders of offshore lightering platforms and provides a pre-weld reshaping aid for a large-sized steel cylinder. The reshaping aid comprises a welding platform, a fixed column, slideways, outer lead screws, outer arc locating blocks, inner jacking rods and the like, the outer circle of the cylinder is reshaped through adjusted rigid constraining positions, and the molding accuracy of a cylinder body is guaranteed by adopting lead screws, gap width adjusting and locating wedges, process supports and the like; according to an established cylinder body welding process, longitudinal weld seams are subjected to tack welding firstly and then subjected to overall welding, and the welding sequence is that space welding is carried out from the middle part to the two ends; assembling welding is carried out among segment cylinder bodies, X-shaped double-sided groove welding is adopted, docking grooves face upwards, the inner side of the cylinder is welded firstly during welding, weld seams of the outer side are subjected to carbon arc gouging after turn over, and then, outer sides of annular weld seams are welded. According to the reshaping aid, small welding deformation is achieved through adjusting rigid constraining and locating blocks and changing a welding sequence, and the requirements of cylinder body welding on accuracy are guaranteed.
Description
Technical field
The utility model belongs to welding technology field, relates in particular to shaping, the welding technology field transferred before the moulding, assembling, welding of the large-scale support cylindrical shell on platform in sea.
Background technology
Support cylindrical shell and be the transfer critical component of platform of sea, this round steel pipe structure must be welded on above main deck, and base bearing, by three row rollers, is arranged on the top of cylindrical shell, so cylindrical shell and main deck will guarantee strict perpendicularity and levelness.The transfer support cylindrical shell of platform of sea is dressed up by several shell ring soldering group, and the diameter of cylindrical shell reaches 2000-4000 millimeter, the problems such as length reaches 6000-15000 millimeter, and its manufacturing process is complicated, need workmen and auxiliary clamp, jig is many, labour intensity is large, the construction period is long.
At present, in the manufacture craft of this class large-sized steel cylindrical member, generally, after the welding of cylindrical shell longitudinal seam, need on round end rolling mill, to cylindrical shell, carry out follow-up shaping or adopt hot school shape, to overcome the angular deformation producing after longitudinal seam welding.There is larger limitation in the method: one, at barrel soldering scene, do not possess postwelding machinery school shape condition, and be difficult to guarantee circularity and the levelness requirement of cylindrical shell; Its two, postwelding carries out significantly hot school shape to cylindrical shell and can have a negative impact to the performance of the material of cylindrical shell, to sea transfer platform support bulk strength, shock resistance, all can be influenced to performances such as water quality, environmental pollutions.Therefore, cylindrical shell shaping mould reasonable in design, to adjusting accurately before cylindrical shell weldering, and the welding procedure of science is the important leverage that guarantees that cylinder post welding distortion is little, form accuracy is high.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provide a kind of for shaping mould before the weldering of large-sized steel cylindrical shell, position by each reshaping device of reasonable Arrangement in inside and outside slideway, adjusting screw stroke are determined the rigid constraint scope of each locating piece, and before realizing weldering by adjusting screw, cylindrical configuration is carried out to shaping, post welding distortion amount can observe directly, and takes corresponding measure to proofread and correct.
the technical solution of the utility model is:shaping mould before cartridge type part weldering described in the utility model, comprise that jig, fixed column, slideway, outer arc reshaping device, inner arc reshaping device form, described fixed column is located at the central authorities of jig, described slideway comprises inner arc slideway and outer arc slideway, inner arc slideway and outer arc slideway are for take the circular concentric slideway that fixed column is the center of circle, the external diameter of inner arc slideway is less than the minimum diameter of welding cylindrical shell, the internal diameter of outer arc slideway is greater than the maximum outside diameter of welding cylindrical shell, and described slideway comprises inner arc slideway and outer arc slideway; Described outer arc reshaping device consists of outer arc locating piece, outer leading screw, support arm, support arm bottom nested is arranged in outer arc slideway, and be provided with locking nut and can be fixed on jig, out screw rod is installed on support arm top, the top of outer leading screw connects outer arc locating piece, towards the cylindrical shell center of circle; Described outer arc reshaping device consists of interior push rod, inner support, and inner support bottom nested is arranged in inner arc slideway, and is provided with locking nut and can be fixed on jig, inner support top install in push rod, the top of outer leading screw is towards barrel wall.During welding, according to cylindrical shell size and thickness of slab, determine that inside and outside arc reshaping device arranges 4-12 group in each slideway, according to cylindrical shell profile situation, shaping screw mechanism is arranged in to applicable position along slideway, by locking nut fixedly on jig; By the location positioning along cylindrical shell radiai adjustment push rod, outer arc locating piece in each, go out the rigid constraint scope of mould, cylindrical configuration is carried out to shaping before realizing weldering.
Shaping mould before described a kind of large-sized steel cartridge type part weldering, one side it is characterized in that it is the plate body on concave arc shape limit that described outer arc locating piece is one, it is the plate body of arc length 20-300mm.
Shaping mould before described a kind of large-sized steel cartridge type part weldering, is characterized in that described inner arc slideway and outer arc slideway are to take fixed column as the center of circle.
Shaping mould before described a kind of large-sized steel cartridge type part weldering, it is characterized in that along the circumferential direction offering many group screwed holes as the circuit orbit that support arm and inner support are installed on jig, and circular trace be take fixed column as the center of circle.
the beneficial effects of the utility model:
1.the utility model carries out accurate shaping to cylindrical shell by the shaping mould on jig before weldering, adjust rigid constraint locating piece, change welding sequence to reach little welding deformation, never avoid cylindrical shell postwelding machinery school shape operation, both save operation, guaranteed again the required precision of welding cylindrical shell.
Process provided by the utility model, applicable wallboard thickness range is large, and barrel diameter is in the making of more than 2000 millimeters tube-type parts, and shaping mould is simple in structure, and convenient operation, has wide range of applications.
During segmentation cylindrical shell assembly welding, adopt first tack welding, rear real Welding, welding sequence is taked the weldering measure of balanced welding, interval, makes barrel distortion little, and welding stress is little, finely meets design size requirement, and welding first-time qualification rate is provided.
Accompanying drawing explanation
The circular slot type shaping mould of Fig. 1 schematic diagram.
Mould process layout drawing during Fig. 2 barrel soldering.
The shaping mould schematic diagram of Fig. 3 aperture type arrangement.
In figure: jig 1; Fixed column 2; Inner arc slideway 3, outer arc slideway 4; Support arm 5; Outer leading screw 6; Outer arc locating piece 7; Interior push rod 8, inner support 9; Cylindrical shell 10; Support arm hole 11; Inner support hole 12.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail: consult Fig. 1, what this law provided is a kind of for shaping mould before the weldering of large-scale cartridge type part, shaping mould before a kind of large-sized steel cartridge type part weldering, described die device comprises that jig 1, fixed column 2, slideway, outer arc reshaping device, inner arc reshaping device form, and described slideway comprises inner arc slideway 3 and outer arc slideway 4; Described outer arc reshaping device consists of outer arc locating piece 7, outer leading screw 6, support arm 5, support arm 5 bottom nested are arranged in outer arc slideway 4, and be provided with locking nut and can be fixed on jig, out screw rod 6 is installed on support arm 5 tops, the top of outer leading screw 6 connects outer arc locating piece 7, towards the cylindrical shell center of circle; Described outer arc reshaping device consists of interior push rod 8, inner support 9, and inner support 9 bottom nested are arranged in inner arc slideway 3, and is provided with locking nut and can be fixed on jig, inner support 9 tops install in push rod 8, the top of outer leading screw 6 is towards barrel wall.During welding, according to cylindrical shell size and thickness of slab, determine that inside and outside arc reshaping device arranges 4-12 group in each slideway, according to cylindrical shell profile situation, shaping screw mechanism is arranged in to applicable position along slideway, by locking nut fixedly on jig; By the location positioning along cylindrical shell radiai adjustment push rod 8, outer arc locating piece 7 in each, go out the rigid constraint scope of mould, cylindrical configuration is carried out to shaping before realizing weldering.
Apply the welding method that the front shaping mould of cartridge type part weldering described in the utility model is made large-sized steel cartridge type part, mainly comprise the following steps:
(1) on jig 1, take fixed column 2 as the center of circle, by 1:1, draw the projection datum line of the inside and outside circumference of cylindrical shell, the position reference line as interior push rod 8 with outer arc locating piece 7;
(2) reshaping device in each is evenly arranged in inner arc slideway 3, and in regulating, push rod 8 makes its masthead portion align with the cylindrical shell inner circle datum line drawing by step (1), by retaining mechanism, is fixed on jig 1; Again outer arc locating piece 7 is moved to cylindrical shell cylindrical datum line vicinity, reserve the deformation range of cylindrical shell segmental arc under free state, determine the scope of each rigid constraint.
(3) by the cylindrical shell segmental arc vertical lifting of rolling to jig 1, make the projection datum line contraposition on cylindrical shell segmental arc and platform, by external force, adjust cylinder roundness, at the additional rigid constraint hoop of cylindrical shell circumference, restraint garter 3 roads are evenly arranged on cylindrical shell, according to cylindrical shell shaping situation, outer reshaping device reasonable set is arranged in to outer arc slideway 4, by retaining mechanism, be fixed on jig, then regulate each outer leading screw 6 to promote outer arc locating piece 7, until each outer arc locating piece aligns with the cylindrical shell cylindrical datum line drawing by step (1), in longitudinal seam both sides, burn-on fixing with moulding bed, and reserved groove gap 0.3-2mm.
(4) along cylindrical shell longitudinal seam, at the enterprising spot welding of the inside and outside circumference of cylindrical shell, fix, spot welding is sequentially to two ends, to carry out respectively interval welding from the middle part of cylindrical shell longitudinal seam, and positive and negative alternate welding; Then the internal groove welding to cylindrical shell longitudinal seam, carries out respectively interval welding from longitudinal seam middle part to two ends; Stand up rear to the outer side weld carbon arc air gouging back chipping of cylindrical shell, to welding outside longitudinal seam.
(5) welding cylindrical shell internal partition: first eject rigging datum line in the position of cylinder inboard wall assembling internal partition, and while installing, guarantee internal partition level, installation reference line contraposition with cylinder inner wall, its flatness Deviation Control is ± 1.2mm, internal partition cylindrical inserts the wide adjustment locating wedge of seam, guarantee that its cross center is concentric with cylinder, internal partition cylindrical and cylinder inner wall clearance control are 0.5-2mm.Internal partition rigging position carries out spot welding and fixes after determining, every section of circular weld adopts fractionally spaced formula welding, then the cylindrical shell other end adds process for stabilizing support, finally each groove is implemented to formal welding.
(6) assembly welding between cylindrical shell: segmentation cylindrical shell staggers longitudinal seam 180 ° and arranges when welding, the docking end face processing double groove of cylindrical shell, groove angle is 45 °, stays root 2mm; Segmentation cylindrical shell is seated on large-scale automatic turntable, adjustment center, rotation centerline Deviation Control is at ± 0.5mm, cylindrical shell adopts adopting automatic submerged arc welding with the circular weld that docks between cylindrical shell, welding current is controlled as 600A, voltage 35V, during welding, auto back turntable is with the linear velocity uniform rotation of 45mm per minute.During welding, first cylindrical shell interior annular weld seam is welded, stand up afterwards to the outer side weld carbon arc air gouging back chipping of cylinder, then circular weld outside is welded.
(7) cylindrical shell annular and longitudinally butt weld do the ultrasound examination of 100% length, the T-shape welding line joint of handing-over is made to radiographic inspection and detects, require to reach pore-free, slag inclusion, rift defect, then to cylindrical shell carry out flame straightening, processing eliminates stress.
Above-described embodiment has schematically, in the situation that not departing from this real invention aim, can also do a lot of distortion, and these all belong to the row of this patent protection.
Claims (3)
1. a shaping accessory before the weldering of large-sized steel cylinder, is characterized in that, comprises jig (1), fixed column (2), slideway, outer arc reshaping device, inner arc reshaping device; Described fixed column (2) is located at the central authorities of jig (1), described slideway comprises inner arc slideway (3) and outer arc slideway (4), inner arc slideway (3) and outer arc slideway (4) are to take the circular concentric slideway that fixed column (2) is the center of circle, the external diameter of inner arc slideway (3) is less than the minimum diameter of welding cylindrical shell, and the internal diameter of outer arc slideway (4) is greater than the maximum outside diameter of welding cylindrical shell; Described outer arc reshaping device consists of outer arc locating piece (7), outer leading screw (6) and support arm (5), support arm (5) bottom nested is arranged in outer arc slideway (4), and be provided with locking nut support arm (5) is fixed on jig, out screw rod (6) is installed on support arm (5) top, the top of outer leading screw (6) connects outer arc locating piece (7), towards the cylindrical shell center of circle; Described inner arc reshaping device consists of interior push rod (8), inner support (9), inner support (9) bottom nested is arranged in inner arc slideway (3), and be provided with locking nut inner support (9) is fixed on jig, interior push rod (8) is installed on inner support (9) top, and the top of outer leading screw (6) is towards barrel wall; During welding, according to cylindrical shell size and thickness of slab, in inner arc slideway (3), outer arc slideway (4), respectively arrange 4-12 group inner arc reshaping device, outer arc reshaping device, according to cylindrical shell profile situation, arrange the position of shaping screw mechanism, by locking nut fixedly on jig; By the location positioning along cylindrical shell radiai adjustment push rod (8), outer arc locating piece (7) in each, go out the rigid constraint scope of mould, before weldering, cylindrical configuration is carried out to shaping.
2. shaping accessory before the weldering of a kind of large-sized steel cylinder according to claim 1, is characterized in that, described outer arc locating piece (7) one side be towards the center of circle be the plate body on concave arc shape limit, the arc length on concave arc shape limit is 20-300mm.
3. shaping accessory before the weldering of a kind of large-sized steel cylinder according to claim 2, is characterized in that, along the circumferential direction offers screwed hole on jig, and the circuit orbit of support arm (5) and inner support (9) is installed by bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320133390.0U CN203409470U (en) | 2013-03-22 | 2013-03-22 | Pre-weld reshaping aid for large-sized steel cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320133390.0U CN203409470U (en) | 2013-03-22 | 2013-03-22 | Pre-weld reshaping aid for large-sized steel cylinder |
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| CN203409470U true CN203409470U (en) | 2014-01-29 |
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| CN201320133390.0U Withdrawn - After Issue CN203409470U (en) | 2013-03-22 | 2013-03-22 | Pre-weld reshaping aid for large-sized steel cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103273252A (en) * | 2013-03-22 | 2013-09-04 | 江苏鼎盛重工有限公司 | Pre-welding shaping auxiliary mold of large-scale steel cylinder and welding method |
| CN103878445A (en) * | 2014-03-31 | 2014-06-25 | 成都振中电气有限公司 | Transverse moving device for pipes |
| CN104526154A (en) * | 2014-11-13 | 2015-04-22 | 首都航天机械公司 | Outer positioning compressing mechanism for friction stir welding of box body circumferential weld |
| CN104942517A (en) * | 2015-06-24 | 2015-09-30 | 苏州边桐传感科技有限公司 | Lifting adjustment type welding rotating clamping table |
| CN105149858A (en) * | 2015-08-21 | 2015-12-16 | 哈尔滨建成集团有限公司 | Equal-diameter support device for cylinders formed by rolling steel plates |
| CN105689452A (en) * | 2014-11-25 | 2016-06-22 | 中国核工业二四建设有限公司 | Radian accuracy control device for arc-shaped steel structure |
| CN106002002A (en) * | 2016-05-06 | 2016-10-12 | 兰州兰石重型装备股份有限公司 | Thin-wall barrel body anti-deformation device adjustable in diameter |
| CN107012312A (en) * | 2017-06-08 | 2017-08-04 | 中国电建集团核电工程公司 | Segmented oxygen-eliminating device terminating girth joint heat treatment auxiliary device |
| CN107199430A (en) * | 2017-03-20 | 2017-09-26 | 西安航天动力机械厂 | One kind is used for high pressure vessel areole flange welding and assembles device |
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| CN110153830A (en) * | 2019-06-04 | 2019-08-23 | 吴胜奎 | A kind of vertical steel-pipe welding sanding and polishing machine people |
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| CN111015047A (en) * | 2019-10-14 | 2020-04-17 | 武汉船用机械有限责任公司 | Welding tool and welding method for combustion chamber shell of gas turbine |
| CN112705591A (en) * | 2020-11-23 | 2021-04-27 | 湖南兵器资江机器有限公司 | Cylindrical thin-wall part circle turning device |
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2013
- 2013-03-22 CN CN201320133390.0U patent/CN203409470U/en not_active Withdrawn - After Issue
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| CN103273252B (en) * | 2013-03-22 | 2015-08-12 | 江苏鼎盛重工有限公司 | Shaping accessory and welding method before a kind of weldering of large-sized steel cylinder |
| CN103273252A (en) * | 2013-03-22 | 2013-09-04 | 江苏鼎盛重工有限公司 | Pre-welding shaping auxiliary mold of large-scale steel cylinder and welding method |
| CN103878445A (en) * | 2014-03-31 | 2014-06-25 | 成都振中电气有限公司 | Transverse moving device for pipes |
| CN104526154A (en) * | 2014-11-13 | 2015-04-22 | 首都航天机械公司 | Outer positioning compressing mechanism for friction stir welding of box body circumferential weld |
| CN105689452B (en) * | 2014-11-25 | 2017-09-29 | 中国核工业二四建设有限公司 | A kind of arc steel structure radian precision control device |
| CN105689452A (en) * | 2014-11-25 | 2016-06-22 | 中国核工业二四建设有限公司 | Radian accuracy control device for arc-shaped steel structure |
| CN104942517A (en) * | 2015-06-24 | 2015-09-30 | 苏州边桐传感科技有限公司 | Lifting adjustment type welding rotating clamping table |
| CN105149858A (en) * | 2015-08-21 | 2015-12-16 | 哈尔滨建成集团有限公司 | Equal-diameter support device for cylinders formed by rolling steel plates |
| CN106002002A (en) * | 2016-05-06 | 2016-10-12 | 兰州兰石重型装备股份有限公司 | Thin-wall barrel body anti-deformation device adjustable in diameter |
| CN107199430A (en) * | 2017-03-20 | 2017-09-26 | 西安航天动力机械厂 | One kind is used for high pressure vessel areole flange welding and assembles device |
| CN107012312A (en) * | 2017-06-08 | 2017-08-04 | 中国电建集团核电工程公司 | Segmented oxygen-eliminating device terminating girth joint heat treatment auxiliary device |
| CN108907812A (en) * | 2018-09-20 | 2018-11-30 | 盐城加美机电科技有限公司 | A kind of annular is redrilled processing positioning fixture |
| CN108907812B (en) * | 2018-09-20 | 2020-12-29 | 盐城同环机电科技有限公司 | Annular heavy drill processing positioning fixture |
| CN110153830A (en) * | 2019-06-04 | 2019-08-23 | 吴胜奎 | A kind of vertical steel-pipe welding sanding and polishing machine people |
| CN111015047A (en) * | 2019-10-14 | 2020-04-17 | 武汉船用机械有限责任公司 | Welding tool and welding method for combustion chamber shell of gas turbine |
| CN111015047B (en) * | 2019-10-14 | 2022-08-23 | 武汉船用机械有限责任公司 | Welding tool and welding method for combustion chamber shell of gas turbine |
| CN110977124A (en) * | 2019-12-26 | 2020-04-10 | 章周华 | Resistance welding processing equipment for alloy-embedded drill bit |
| CN112705591A (en) * | 2020-11-23 | 2021-04-27 | 湖南兵器资江机器有限公司 | Cylindrical thin-wall part circle turning device |
| CN113560793A (en) * | 2021-08-24 | 2021-10-29 | 金川集团股份有限公司 | Forming and fixing device for machining metal cylinder and cylinder machining method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |