The method of mag welding for inclined tube plate welding
A technology for inclined pipes and welded pipes, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc. It can solve problems such as difficult operation, unqualified appearance, and difficult welding, so as to ensure the quality and shape of the weld seam and ensure the bottoming The quality of the weld seam and the effect of avoiding wire breakage
Active Publication Date: 2020-11-10
PANGANG GRP ENG TECH
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Problems solved by technology
However, when performing butt welding of small-thickness pipes and tube-to-sheet welding, the weld seam is in the circumferential direction. If conventional continuous arc welding is used, MAG welding itself belongs to automatic wire feeding, and the wire feeding speed is very fast. The operator must control the welding The forming of the seam must ensure that the angle of the welding torch is turned rapidly during welding. Problems such as deflection and unqualified appearance
Especially in the bottom welding, it is impossible to guarantee the shape of the front and back of the weld.
Method used
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Embodiment Construction
[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] The method for MAG welding to carry out inclined tube plate welding comprises the following steps: A, setting a set hole on the plate 2 to be welded, and setting a welding groove 3 along the circumferential direction of the set hole, so that the pipe 1 to be welded and the plate 2 to be welded are inclined, and the plate to be welded The plate 2 is set on the lower end of the pipe to be welded 1 through the set hole, there is a gap between the hole wall of the set hole and the pipe to be welded 1, and the pipe to be welded 1 and the plate to be welded are fixed; the position between the plate to be welded 2 and the pipe to be welded 1 is the welding position 4;
[0018] B. Welding the bottoming weld 9, specifically: first, at the root of the welding position 4 and immediately after the arc is struck on the pipe 1 to be welded to form the...
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The invention discloses a method for welding an inclined pipe plate by using MAG welding, relates to the technical field of welding, and provides a welding method capable of improving welding quality.The welding method comprises the following steps of: A, preparing welding; B, welding the bottoming welding seam, wherein, an initial primer solidification molten pool is welded through a 'three-point connection method', and then the primer solidification molten pool is backed up until the welding is full for one circle at the two edges of the initial primer solidification molten pool along the radial direction of the pipe; C, welding the welding seam of the cover surface, wherein the multi-channel cover surface molten pool is backed up along the radial direction of the pipe until the weldingis full for one circle. According to the invention, the continuous welding in the circumferential direction is converted into a plurality of sections of arc welding in a straight line direction, so that the controlling of the angle of the welding gun is facilitated during welding, and the quality and shape of the welding seam are easily ensured.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a method for welding inclined tube plates by MAG welding. Background technique [0002] MAG welding refers to molten electrode active gas shielded arc welding. Compared with the existing common manual electrode arc welding, MAG welding has the advantages of high welding efficiency and low cost, so it is more and more widely used. [0003] In MAG welding, continuous arc welding is used for welding when the welding component is a component with a thicker base material such as a blast furnace or a converter skin, or the weld is a flat weld or a flat fillet weld, and the operation is less difficult. However, when performing butt welding of small-thickness pipes and tube-to-sheet welding, the weld seam is in the circumferential direction. If conventional continuous arc welding is used, MAG welding itself belongs to automatic wire feeding, and the wire feeding speed is very fast. The ...
Claims
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IPC IPC(8): B23K9/00B23K9/173
CPCB23K9/0052B23K9/173
Inventor 梁恩荣王跃峰何耀飞鲁晓欣
Owner PANGANG GRP ENG TECH