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Hot dip galvanized thin plate butt welding method

A welding method and hot-dip galvanizing technology, which are applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of different thicknesses of galvanized sheets, and achieve the effect of improving welding quality and welding methods are simple and easy to operate

Inactive Publication Date: 2011-04-27
马国红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the full penetration welding process of galvanized sheet, due to the different thickness of galvanized sheet, it has not been completely solved yet.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention is realized like this, method step is:

[0015] 1. Adjust the horizontal distance between the two electrodes to 3-4 mm, the end of the welding gun nozzle is 18-25 mm away from the workpiece, the dry elongation is 10 mm, and the distance from the arc electrode to the workpiece is 8-10 mm;

[0016] 2. Connect the welding shielding gas, the shielding gas flow rate is 3 liters per minute, start the water cooling equipment, and prepare for welding;

[0017] 3. Place the thin plate to be welded directly on the horizontal motion platform and fix it without leaving a gap;

[0018] 4. Adjust the welding current of the main arc welding machine to 90 amps, the current of the secondary arc welding machine to 120 amps or 26 volts, adjust the wire feeding speed to 0.4 m / min, and the workpiece platform movement speed to 0.5 m / min;

[0019] 5. First pass the shielding gas for 3 seconds, the shielding gas is composed of 90% argon and 10% carbon dioxide by volume f...

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Abstract

The invention discloses a hot dip galvanized thin plate butt welding method. The method is characterized by comprising the following steps of: 1, adjusting the horizontal distance between double electrodes to be 3 to 4 millimeters; 2, connecting welding protective gas; 3, directly placing and fixing a thin plate to be welded on a horizontal motion platform without reserving gaps; 4, adjusting the welder current of a master electric arc welder to be 90 amperes, adjusting the current of a slave electric arc welder to be 120 amperes or 26 volts, adjusting the wire feeding speed to be 0.4 meter per minute, and adjusting the motion speed of the workpiece platform to be 0.5 meter per minute; 5, introducing the protective gas for 3 seconds, then starting a master electric arc and a slave electric arc, starting the motion platform after 1 second to drive the workpiece to move, and starting welding; 6, when the welding is finished, switching off a slave electric arc switch, and then switching off a master electric arc switch and a motion platform switch; and 7, switching off a protective gas switch after 5 seconds, meanwhile closing water cooling equipment, and finishing welding. The welding method is simple and easy to operate, improves the welding quality, and is particularly suitable for complete penetration welding of butt welding of thin plates with thickness of 2.5 millimeters.

Description

technical field [0001] The invention relates to a welding method, in particular to a butt welding method of a hot-dip galvanized sheet. Background technique [0002] Hot-dip galvanized sheet welding is likely to cause welding defects such as pores and cracks. Conventional welding methods usually use single-arc carbon dioxide welding, single-arc MIG welding, laser and GMAW composite welding, etc., and the corresponding welding processes are different. However, for the full penetration welding process of galvanized sheet, due to the different thickness of galvanized sheet, it has not been completely solved yet. Contents of the invention [0003] The purpose of the present invention is to provide a butt welding method for hot-dip galvanized sheets, which is based on the double composite arc welding method, which can reduce problems such as weld cracks and pores in the sheet welding process, and achieve full penetration High quality welding. [0004] The present invention is...

Claims

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Application Information

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IPC IPC(8): B23K9/16B23K9/23B23K9/095
Inventor 马国红王聪
Owner 马国红
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