Steel plate high heat input welding method
A technology of large heat input welding and steel plates, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of low pass rate of thick plate welding, inability to penetrate, and low welding efficiency, so as to reduce welding defects and improve The effect of welding efficiency and quality
Pending Publication Date: 2022-07-15
GUANGZHOU SHIPYARD INTERNATIONAL LTD
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Problems solved by technology
The existing welding methods for thick plates have the following problems: 1) Single-wire vertical gas-electric welding is used for welding. Due to the thick plate thickness (thickness is greater than 45mm), it will easily lead to the situation that the root cannot be penetrated; 2) FCAW is used manual semi-automatic For welding, multi-layer and multi-pass welding is required, the welding efficiency is low, and manual operation is prone to welding defects; 3) The welding qualification rate of thick plates is low
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[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.
[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship ...
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Abstract
The invention relates to the technical field of welding, in particular to a steel plate high heat input welding method which comprises the following steps: a welding process: a first welding wire and a second welding wire are adopted for welding, the first welding wire and the second welding wire are arranged in the thickness direction of a steel plate, the first welding wire is located on one side close to the root of a welding seam, and the second welding wire is located on the other side close to the root of the welding seam; the second welding wire is positioned on one side far away from the root of the welding seam; the first welding wire does not swing, and the second welding wire swings in the thickness direction of the steel plate; in the welding seam forming process, a sliding block is installed on the front face of the welding seam, a cooling loop of the second welding wire passes through the sliding block, and the sliding block is used for forming the front face of the welding seam; and mounting a gasket on the back of the weld joint, wherein the gasket is used for forming the back of the weld joint. According to the welding method, the problem that the efficiency is low when FCAW manual semi-automatic welding is adopted for the thick steel plate butt welding seam can be solved, welding defects are avoided or reduced, and the welding efficiency and quality of the thick plate vertical butt welding seam are improved.
Description
technical field [0001] The invention relates to the technical field of welding, in particular to a method for welding a steel plate with large line energy. Background technique [0002] The welding line energy is a function of the welding current I (A), the arc voltage E (V) and the welding speed v (cm / s). The higher the steel, the steel that can withstand the line energy of more than 50kJ / cm is called high-line energy welding steel, which is mainly used in ship plates, oil tanks, high-rise building structures and other fields. With the improvement of the thickness, strength and welding efficiency of the steel plate, the steel plate is required to have higher welding performance to adapt to the welding of large line energy, and it has become the development trend of the thick plate to adapt to the welding of large line energy. [0003] At present, in the process of container construction, thick plates (such as 60mm) are used in the torsion box segment, which involves vertic...
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IPC IPC(8): B23K9/02
CPCB23K9/02B23K2101/18B23K2103/04
Inventor 陈华江泽新李英华
Owner GUANGZHOU SHIPYARD INTERNATIONAL LTD