Offshore drilling platform spud leg rack welding method
A technology of pile legs and welding method of drilling platform, applied in welding equipment, welding accessories, arc welding equipment and other directions, can solve problems such as difficulty in welding pile legs and racks, and achieve the effect of weakening the magnetic bias blowing phenomenon and improving the feasibility
Pending Publication Date: 2018-08-21
上海拓直数字科技有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is that in the prior art, it is difficult to weld the leg racks of offshore drilling platforms after they are magnetized.
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[0027] In the prior art, steel is easily magnetized during cutting, machining, magnetic lifting and welding, which brings troubles to welding. Before welding, the magnetized steel pipe must be demagnetized, especially on offshore drilling platforms. During the welding process of the leg rack, the rack 1 has a semicircular tube 2, and after the welding between the butted racks 1 is completed, the window plate 3 is buckled on the semicircular tube on the rack 1 2, the welding between the long guard plate 3 and the semicircular tube 2 is realized. At this time, the magnetized magnetic field comes from the magnetized window panel 3, the rack 1 and the semicircular tube 2, and the intersection of the magnetic field is complicated. In this The phenomenon of magnetic deflection is more serious in the complex intersection magnetic field, and welding is more difficult. Therefore, in order to stabilize the welding process and improve the quality of welded joints, it is particularly impor...
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The invention relates to the technical field of welding, and discloses an offshore drilling platform spud leg rack welding method. The method comprises the steps that a window plate is buckled to a semicircular pipe; a welding machine is adopted for welding a groove formed between the window plate and the semicircular pipe, and another welding machine is adopted for applying welding on a magneticconductive component while the groove is welded, wherein the welding machine for welding the groove is a weld seam welding machine, the welding machine for applying welding on the magnetic conductivecomponent is a demagnetization welding machine, and electric polarities of the weld seam welding machine and the demagnetization welding machine are opposite. According to the welding method, magneticblow is weakened synchronously through physical demagnetization and welding sequence reasonable arrangement according to the actual condition, the operation method is simple, and the offshore drilling platform spud leg rack welding method is easy to achieve.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for pile leg racks of an offshore drilling platform. Background technique [0002] Steel is easily magnetized during cutting, machining, magnetic lifting and welding. Welding joints with small magnetism can barely be welded, but when the magnetism is too large, especially when large-scale steel pipe components are installed, the magnetization intensity is very high. , will produce the phenomenon of magnetic blowing, magnetic blowing is a major problem in welding operations, light ones, affecting the stable combustion of the arc, resulting in strips at the root of the weld that are not penetrated, and pores between layers, making the weld shape worse etc. In severe cases, after arcing, the electrode sticks tightly to the groove due to the magnetism of the groove, and the welding arc is in the shape of "spraying around". The arc in the groove cannot be ignited nor...
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IPC IPC(8): B23K9/16B23K9/32
CPCB23K9/16B23K9/32
Inventor 宋宪磊朱海洋
Owner 上海拓直数字科技有限公司