Welding method for fabricated steel structure connecting joint
A technology for connecting nodes and welding methods, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problems of spatter, welding penetration and deformation, and cannot guarantee the stability of welding quality, so as to maintain stability, The effect of maintaining welding quality
Inactive Publication Date: 2021-04-27
JILIN JIANZHU UNIVERSITY
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Problems solved by technology
[0003] In the welding process, parameters such as welding current, welding voltage, and welding wire diameter generally need to be determined according to the properties of the workpiece to be welded; in addition to the above welding parameters, the distance between the welding torch and the workpiece and the welding speed will also have a greater impact on the welding quality. Moreover, some objective factors may lead to changes in the set parameters during the welding process, resulting in problems such as spatter, weld penetration and deformation during the welding process, and the stability of the welding quality cannot be guaranteed.
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[0030] The present invention will be described in further detail below, so that those skilled in the art can implement it with reference to the description.
[0031] The invention provides a welding method for connecting joints of assembled steel structures, which is mainly suitable for controlling the welding process when using a MIG automatic welding machine, including the following steps:
[0032] Step 1. During the welding process of steel structure connection nodes, the welding current I, arc voltage V, welding workpiece thickness h and welding wire diameter d are obtained according to the cycle, and according to the welding current I, arc voltage V, welding workpiece thickness h and welding wire The diameter d, determines the basic stability factor η of the welding process.
[0033] Step 2. According to the sampling period, the current welding speed v, the shielding gas flow Q and the distance S between the welding torch and the workpiece are obtained, and according to t...
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The invention discloses a welding method for a fabricated steel structure connecting joint. The method comprises the following steps: 1, acquiring a welding current I, an arc voltage V, a welding workpiece thickness h and a welding wire diameter d in the welding process of the steel structure connecting joint, and determining a basic stability coefficient eta in the welding process; 2, acquiring the welding speed v, the shielding gas flow Q and the distance S between a welding gun and a workpiece, and judging the welding quality grade according to the basic stability coefficient eta, the welding speed v, the shielding gas flow Q and the distance S between the welding gun and the workpiece; and 3, adjusting welding parameters according to the welding quality grade.
Description
technical field [0001] The invention belongs to the technical field of assembled steel structure connections, and in particular relates to a welding method for connecting nodes of assembled steel structures. Background technique [0002] At present, the connection nodes of fabricated steel structures are mainly connected by bolt welding, and maintaining the stability of welding quality is a prerequisite for improving the quality of connection nodes of fabricated steel structures. MIG welding is a commonly used welding method. MIG welding uses a melting electrode, plus an inert gas (Ar or He) as a protective arc medium, and an arc welding method that protects metal droplets, weld pools and high-temperature metals in the welding zone. [0003] In the welding process, parameters such as welding current, welding voltage, and welding wire diameter generally need to be determined according to the properties of the workpiece to be welded; in addition to the above welding parameters...
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IPC IPC(8): B23K9/16B23K9/095
CPCB23K9/16B23K9/095B23K2103/04
Inventor 王秀丽范栩东刘富军郑秋玲
Owner JILIN JIANZHU UNIVERSITY