CN103949784B - Extra large work crane runway weld industry technique - Google Patents
Extra large work crane runway weld industry technique Download PDFInfo
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- CN103949784B CN103949784B CN201410121296.2A CN201410121296A CN103949784B CN 103949784 B CN103949784 B CN 103949784B CN 201410121296 A CN201410121296 A CN 201410121296A CN 103949784 B CN103949784 B CN 103949784B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
The invention discloses a kind of extra large work crane runway weld industry technique, it includes polishing cleaning, installs the steps such as interim Karma, electrical heating welding region, horizontal position welding welded rails plate and web, horizontal position welding welded rails plate and dividing plate, vertical position welding welding diaphragm and web and insulation, is finally cut and is machined again.The beneficial effects of the invention are as follows：Welded using the technique after the work crane runway of sea, without correction of attacking with fire, track flatness is can be controlled in the margin of tolerance for making and requiring, reduce 10mm deflection during the technique than not using, shortened the fabrication cycle of track, improved efficiency.
Description
Technical field
The present invention relates to section bar assemble welding technology, and in particular to a kind of welding procedure of extra large work crane runway weld industry.
Background technology
Extra large work crane runway uses S690QL high-strength hardened and tempered steels, because quenched hardness of steel is high, track structure is nonaxisymmetric structure, on the premise of it can not carry out heat straightening, it is quite big to correct it and deform difficulty, so what is produced in control welding process is deformed into for topmost technical problem.Requirement relative accuracy due to track to each facial plane degree is higher, the deformation of generation can directly influence the course of work that dolly is travelled in orbit, accordingly, it would be desirable to which the best combination of the composite factor such as rational welding sequence, welding method, welding parameter corrects track welding to realize without attacking with fire.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of extra large work crane runway weld industry technique, after the technique, without the i.e. controllable welding deformation of correction of attacking with fire.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
Extra large work crane runway weld industry technique, it comprises the following steps：
A, weld preparation：
A1, will at the welding region of track plates, web and dividing plate and its both sides at least 25mm carry out polishing cleaning；
A2, all track plates of track groups are welded and fixed in its thickness direction by interim Karma；
B, using electric boiling plate it will be heated to 120 ~ 200 DEG C at welding region weld seam and at least each 50mm in groove both sides；
C, welded rails plate and web weld seam：
C1, track plates are divided into I along its length, II, III 3 regions, totally 16 weld seams between the web of each region middle orbit plate and its side, wherein 8 are upper weld seam, 8 are lower weld seam；
8 upper weld seams in c2, synchronous welding region II；
C3, by c2 steps weld after whole track groups stand up, remaining 8 lower weld seams in synchronous welding region II；
16 lower weld seams in c4, synchronous welding region I and region III；
C5, c4 steps are welded after whole track groups stand up again, remaining 16 upper weld seams in synchronous welding region I and region III；
D, welded rails plate and dividing plate weld seam：
All weld seams of region II middle orbit plate and dividing plate described in d1, synchronous welding step C；
All weld seams of d2, synchronous welding region I and region III middle orbit plate and dividing plate；
E, welding diaphragm and web weld seam：
All weld seams of region II median septum and web described in e1, synchronous welding step C；
All weld seams of e2, synchronous welding region I and region III median septum and web；
F, using electric boiling plate by after step C, step D and step E weldings weld seam be incubated 2 hours, temperature control is at 200 ~ 250 DEG C.
Wherein, above-mentioned steps C, step D and step E welding use flux-cored wire gas shield welding, and gage of wire is 1.2mm, and step C and step D is horizontal position welding, the welding current of horizontal position welding is 185 ~ 220A, and weldingvoltage is 23 ~ 27V, speed of welding is 4.5 ~ 6cm/min, and heat input is 0.4 ~ 0.7KJ/mm；Step E is vertical position welding, and the welding current of vertical position welding is 155 ~ 185A, and weldingvoltage is 23 ~ 27V, and speed of welding is 12 ~ 14cm/min, and heat input is 1.0 ~ 1.8KJ/mm.
Interlayer temperature when step C, step D and step E are welded is 120 ~ 130 DEG C.
Spacing between two neighboring interim Karma is not more than 500mm.
It is an advantage of the invention that：Welded using the technique after the work crane runway of sea, without correction of attacking with fire, track flatness is can be controlled in the margin of tolerance for making and requiring, reduce 10mm deflection during the technique than not using, shortened the fabrication cycle of track, improved efficiency.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the side view figure structure schematic representation of middle orbit group of the present invention；
Fig. 2 is the main view figure structure schematic representation of middle orbit group of the present invention；
Fig. 3 is the position relationship schematic diagram of middle orbit plate of the present invention and interim Karma；
Fig. 4 is the position view of weld seam between track plates and web；
Fig. 5 is that track bond pads complete the structural representation after being cut along center line；
Fig. 6 is the structural representation of single track.
Wherein, 1, track plates, 2, web, 3, dividing plate, 4, interim Karma, 5, slot, 6, upper weld seam, 7, lower weld seam.
Embodiment：
Fig. 1 and Fig. 2 show the track groups structure after the welding procedure welding using the present invention：It is connected between track plates 1 by interim Karma 4, every piece of track plates 1 are further fixed on wing dividing plate 3, the opposite sides connection web 2 of the dividing plate 3, the mode that is fixedly connected of track plates 1, web 2 with dividing plate 3 between any two is carried out using following welding procedures.
Extra large work crane runway weld industry technique, it comprises the following steps：
A, weld preparation：
A1, will at track plates 1, the welding region of web 2 and dividing plate 3 and its both sides at least 25mm carry out polishing cleaning；
A2, all track plates 1 of track groups are welded and fixed in its thickness direction by interim Karma 4, as shown in figure 3, the spacing between two neighboring interim Karma 4 is not more than 500mm；
It B, will be heated to 120 ~ 200 DEG C at welding region weld seam and at least each 50mm in groove both sides using electric boiling plate, and control interlayer temperature during welding to be 120 ~ 130 DEG C；
The weld seam of C, welded rails plate 1 and web 2, as shown in Figure 4：
C1, track plates are divided into I along its length, II, III 3 regions, totally 16 weld seams between the web 2 of each region middle orbit plate 1 and its side, wherein it is lower weld seam 7 that 8, which are upper weld seam 6,8,；
8 upper weld seams 6 in c2, synchronous welding region II；
C3, by c2 steps weld after whole track groups stand up, remaining 8 lower weld seams 7 in synchronous welding region II；
16 lower weld seams 7 in c4, synchronous welding region I and region III；
C5, c4 steps are welded after whole track groups stand up again, remaining 16 upper weld seams 6 in synchronous welding region I and region III；
The weld seam of D, welded rails plate 1 and dividing plate 3：
All weld seams of region II middle orbit plate 1 and dividing plate 3 described in d1, synchronous welding step C；
All weld seams of d2, synchronous welding region I and region III middle orbit plate 1 and dividing plate 3；
The weld seam of E, welding diaphragm 3 and web 2：
All weld seams of region II median septum 3 and web 2 described in e1, synchronous welding step C；
All weld seams of e2, synchronous welding region I and region III median septum 3 and web 2；
F, using electric boiling plate by after step C, step D and step E weldings weld seam be incubated 2 hours, temperature control is at 200 ~ 250 DEG C.
Wherein, above-mentioned steps C, step D and step E welding use flux-cored wire gas shield welding, and gage of wire is 1.2mm, and step C and step D is horizontal position welding, the welding current of horizontal position welding is 185 ~ 220A, and weldingvoltage is 23 ~ 27V, speed of welding is 4.5 ~ 6cm/min, and heat input is 0.4 ~ 0.7KJ/mm；Step E is vertical position welding, and the welding current of vertical position welding is 155 ~ 185A, and weldingvoltage is 23 ~ 27V, and speed of welding is 12 ~ 14cm/min, and heat input is 1.0 ~ 1.8KJ/mm.
The technique is in 72 hours after end, and the track groups that butt welding is obtained carry out visual detection, magnetic powder inspection and ultrasonic examination, and measure track flatness；Then remove casual labour to be loaded horse, by track groups to being cut to two groups of tracks, as shown in figure 5, checking again for after its flatness, the slot 5 by every group of track along its center is cut, as shown in Figure 6；Machined surface required for finally line, machining track, it is not necessary to the process for correction of attacking with fire, has shortened the fabrication cycle of track.
Claims (3)
1. extra large work crane runway weld industry technique, it is characterised in that：Comprise the following steps：
A, weld preparation：
A1, will at the welding region of track plates, web and dividing plate and its both sides at least 25mm carry out polishing cleaning；
A2, all track plates of track groups are welded and fixed in its thickness direction by interim Karma；
B, using electric boiling plate it will be heated to 120 ~ 200 DEG C at welding region weld seam and at least each 50mm in groove both sides；
C, welded rails plate and web weld seam：
C1, track plates are divided into I along its length, II, III 3 regions, totally 16 weld seams between the web of each region middle orbit plate and its side, wherein 8 are upper weld seam, 8 are lower weld seam；
8 upper weld seams in c2, synchronous welding region II；
C3, by c2 steps weld after whole track groups stand up, remaining 8 lower weld seams in synchronous welding region II；
16 lower weld seams in c4, synchronous welding region I and region III；
C5, c4 steps are welded after whole track groups stand up again, remaining 16 upper weld seams in synchronous welding region I and region III；
D, welded rails plate and dividing plate weld seam：
All weld seams of region II middle orbit plate and dividing plate described in d1, synchronous welding step C；
All weld seams of d2, synchronous welding region I and region III middle orbit plate and dividing plate；
E, welding diaphragm and web weld seam：
All weld seams of region II median septum and web described in e1, synchronous welding step C；
All weld seams of e2, synchronous welding region I and region III median septum and web；
F, using electric boiling plate by after step C, step D and step E weldings weld seam be incubated 2 hours, temperature control is at 200 ~ 250 DEG C；
Wherein, the step C, step D and step E welding use flux-cored wire gas shield welding, and gage of wire is 1.2mm；The step C and step D are horizontal position welding, and its welding current is 185 ~ 220A, and weldingvoltage is 23 ~ 27V, and speed of welding is 4.5 ~ 6cm/min, and heat input is 0.4 ~ 0.7KJ/mm；The step E is vertical position welding, and its welding current is 155 ~ 185A, and weldingvoltage is 23 ~ 27V, and speed of welding is 12 ~ 14cm/min, and heat input is 1.0 ~ 1.8KJ/mm.
2. extra large work crane runway weld industry technique according to claim 1, it is characterised in that：Interlayer temperature when the step C, step D and step E are welded is 120 ~ 130 DEG C.
3. extra large work crane runway weld industry technique according to claim 1, it is characterised in that：Spacing between the two neighboring interim Karma is not more than 500mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410121296.2A CN103949784B (en) | 2014-03-28 | 2014-03-28 | Extra large work crane runway weld industry technique |
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| CN201410121296.2A CN103949784B (en) | 2014-03-28 | 2014-03-28 | Extra large work crane runway weld industry technique |
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| CN103949784A CN103949784A (en) | 2014-07-30 |
| CN103949784B true CN103949784B (en) | 2017-09-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2631706B2 (en) * | 1988-07-07 | 1997-07-16 | 日本ホイスト株式会社 | Method of manufacturing crane girder |
| JPH08276293A (en) * | 1995-04-04 | 1996-10-22 | Nippon Steel Corp | Cored wire for rail welding |
| EP1909992A1 (en) * | 2005-07-11 | 2008-04-16 | Alcan Technology & Management Ltd. | Composition busbar |
| CN101850464B (en) * | 2009-04-03 | 2012-07-11 | 中国海洋石油总公司 | Orbit of gas shielded welding automatic welding trolley in offshore steel structure |
| CN102976214B (en) * | 2012-11-23 | 2014-08-27 | 南通太平洋海洋工程有限公司 | Inverted mounting method for crane rail of oceanographic engineering |
| CN103331534B (en) * | 2012-12-18 | 2015-08-12 | 南通振华重型装备制造有限公司 | Offshore wind farm by cylinder crocodile formula group to technique |
| CN103184766B (en) * | 2013-03-22 | 2014-12-10 | 中化二建集团有限公司 | Large steel structure and manufacturing method thereof |
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Address after: No. 888, Hai Gong Avenue, Qidong, Jiangsu Province, Jiangsu Patentee after: Nantong CIMC Pacific Ocean Engineering Co., Ltd. Address before: 226200 Jiangsu city of Nantong province Qidong City Yin Yang Zhen Yu Feng Cun Patentee before: Sinopacific Offshore & Engineering Co., Ltd. |