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16000KN multi-site hydraulic plate welded box girder


Facilities, we have prepared the box beam welding process, and implementation of these measures into the small whole process, following on the box beam welding process for the general level c is introduced. 3. Box beam welding process in general principle: According to the above theoretical analysis, to determine the small plate box beam welding process of the general principles are summarized as follows: 3.1 Zuzhuang principles. 3.1.1. According to the specific circumstances of box girders, assembly, adjustment of the assembly with the platform, and the level measured by the level of degrees, to ensure that the selected platform level I3.1.2 base plate,[link widoczny dla zalogowanych], and placed in the platform, operation plans designated size of the pieces of the assembly line and proofing marked red eyes, 3.1 * 3. Then assembly lines, drawings, graded each box girder to be assembled, in principle, for the first rib assembly chamber, cylinder and base plate, to ensure order and can be welded to the welding of the | the second time within the welding chamber assembly to be finished, then the testing, the remaining parts are assembled on each. 3.1.4. Sub-sub-assemblies should be the first Zuzhuang deformation of beams may be supported to determine additional location, quantity, and add Zhicheng 3.3 Welding principles:. 3.3.1 Welding method: box internal testing using manual arc welding seam,[link widoczny dla zalogowanych], connecting the two requirements of thickness less than 540 and no use of semi-automatic weld flaw CO: gas shielded welding, the external weld using manual metal arc welding + submerged arc welding methods. 3.3.2. Welding parameters: according to the above menu, select 3.3.3. Welding sequence: 3.3.3.1 General block with the rest of the first pieces of welding established between the weld, welding should be symmetrical to figure u c, l by a 2-3-4 sequence. Each welding seam of a guillotine when the first welding seam of a 1 / 3 and then welding the back of the weld, back weld to be full, and then welding the first weld side of the remaining 2 / 3 of the weld, 3.3.3. 2 welding cylinder and the base plate Q ring, welding sequence in Figure IV Bu -2-3 a ... ... order. If there are when socket. Methods should be symmetrical welding sleeve and the base plate between the girth, 3.3.3.3. Welding of the ribs and rib stand between the weld, comfort from the main cylinder (center) surrounded by the surrounding radiation, 3.3.3.4. Welding of the ribs and the base plate between the horizontal seam, from radiation to the surrounding block around: 6 Note: The first and second after assembly welding sequence with reference to the above order. Figure III cylinder block and the weld between ribs four-cylinder welding sequence diagram of Figure girth welding sequence diagram 3. d Other requirements: Ⅲ. * 4.1 The welding process should be measured at any time the status of deformation of the welded parts. At any time adjust the welding conditions in order to ensure that the welded parts have a smaller deformation, 3.4.2. Welding preheat the weld when required, must be required before welding preheat temperature thermometer Oh, and sought assurances that a certain layer temperature, 3. d. 3 Drag each weld weld weld after strict inspection, if necessary, 5 times or 10 times with a magnifying glass,[link widoczny dla zalogowanych], no cracks, undercut, slag pockets and other defects, or to carbon arc gouging, grinding wheels and other methods cleared re-welding: 3.4.4 multi-layer multi-pass welding of the strict use of the wind scoop or slag slag hammer and hammer head with a hammer weld Park,[link widoczny dla zalogowanych], and then may continue welding: 3.4.5 the welding boat-shaped slit should be placed into position, flat position welding or fillet weld before welding, try not to stand welding, non-overhead position welding, 3.4.6 testing: drawings by the beam, according to requirements of the assembly sequence of Graded weld testing ultrasonic flaw detection, ground testing areas were found to be polished before testing requirements 3.5. # 3.5.1 annealed intermediate annealing treatment: interior weld cavity to be exhausted, the remaining pieces of the assembly, the overall heat treatment process into the furnace in question by annealing t3.5.2 final annealing; to be all welded After seam welding, the whole into the oven for the final annealing process carried out by heat treatment, 3.6 sandblasting, painting: painting process requirements by sandblasting the surface of Sa21 / 2 level reuse coating. Box beams above the general principles of welding technology, of course, for a particular beam, there are specific requirements, this is no longer described. Through the process of implementation in actual production,[link widoczny dla zalogowanych], post-weld inspection of the box girder, post-weld inspection testing requirements are in line with JBZQ400.3-86 of the BS, BK-level j-shaped precision tolerances and tolerance levels are, respectively, consistent with JB/ZQ4000 .3-86 of the B, F grade, and even better than this level. Practice has proved that technology is reasonable, proper welding sequence, standard parameters and practical, to solve the plate box beam welding problems. 7

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