Welding method of arc-shaped welding seam

A welding method and submerged arc welding technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of reduced work efficiency, many welding batches, and many joints, so as to improve work efficiency, reduce labor intensity, Beautiful weld seam formation

Active Publication Date: 2010-08-25
COSCO SHIPPING SHIPYARD (NANGTONG) CO LTD
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Problems solved by technology

[0002] In the construction of marine engineering, there are often a large number of arc-shaped welding seams that need to be welded. CO2 semi-automatic welding is generally used during welding, because the track of submerged arc automatic welding is linear. It is not useful, and the requirements for welding in marine engineering are extremely high, the workload is huge, the plate is relatively thick, there are many welding batches, and the back of the weld needs to be 100% cleaned. Using CO2 semi-automatic welding not only The welding seam is not beautiful, there are many joints, and the welding speed is slow, which reduces the work efficiency, and it is easy to produce pores after welding, and many slag inclusions are not fused, so that the welding quality cannot be guaranteed

Method used

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specific Embodiment approach

[0016] A kind of embodiment of the welding method of the arc weld seam of the present invention, comprises the following steps:

[0017] A. Choose submerged arc welding machine;

[0018] B. Select the round steel according to the width of the guide wheel of the welding machine;

[0019] C. Bend the round steel into the same shape as the arc shape of the weld;

[0020] D. Fix the round steel on the steel plate to be welded by spot welding, and the distance between the round steel and the arc weld is guaranteed to be 100-150mm;

[0021] E. Clean up the parts that need positioning welding, that is, within 100mm around the arc weld, remove the scale, rust, water, oil and impurities;

[0022] F. Preheating: preheat the 75-100mm around the weld of the steel plate to be welded to 80°C-110°C, and monitor the temperature;

[0023] G. Positioning welding: The welding rod used for positioning welding, the length of positioning welding is greater than or equal to 50mm, and the distance...

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Abstract

The invention discloses a welding method of an arc-shaped welding seam, comprising the following steps of: selecting a submerged-arc welding machine; selecting a round steel according to the width of a guide wheel of the welding machine; bending the round steel into a shape of a welding seam radian; fixing the round steel on a steel plate to be welded in a spot-welding mode; clearing a position needing welding by positioning, and clearing away impurities such as oxide skin, rust, water, oil stains, and the like; preheating; carrying out positioned welding; welding; and finally inspecting: carrying out appearance inspection and magnetic powder inspection. The invention has the advantages of attractive welding seam formation, high welding speed, working efficiency improvement, labor strength reduction and less welding deformation.

Description

Technical field: [0001] The invention relates to a welding method for an arc weld. Background technique: [0002] In the construction of marine engineering, there are often a large number of arc-shaped welding seams that need to be welded. CO2 semi-automatic welding is generally used during welding, because the track of submerged arc automatic welding is linear. It is not useful, and the requirements for welding in marine engineering are extremely high, the workload is huge, the plate is relatively thick, there are many welding batches, and the back of the weld needs to be 100% cleaned. Using CO2 semi-automatic welding not only The welding seam is not beautiful, there are many joints, and the welding speed is slow, which reduces the work efficiency, and it is easy to produce pores after welding, and many slag inclusions are not fused, so that the welding quality cannot be guaranteed. Invention content: [0003] The purpose of the present invention is to overcome the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18
Inventor 李接虎马万里郑云峰沈建军
Owner COSCO SHIPPING SHIPYARD (NANGTONG) CO LTD
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