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Cable welding wire narrow gap welding method, protective gas nozzle and welding gun

A cable-type welding wire and shielding gas technology, used in welding torches, cable-type welding wire narrow-gap welding, and shielding gas nozzle fields, can solve problems such as affecting welding efficiency and short service life of contact nozzles, so as to improve welding efficiency, improve production efficiency, The effect of improving the service life

Inactive Publication Date: 2019-06-21
SUZHOU YINLI WELDING IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Therefore, the technical problem to be solved by the present invention is to overcome the existing defect of using the cable welding wire method for narrow gap welding. During the welding process, d

Method used

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  • Cable welding wire narrow gap welding method, protective gas nozzle and welding gun
  • Cable welding wire narrow gap welding method, protective gas nozzle and welding gun
  • Cable welding wire narrow gap welding method, protective gas nozzle and welding gun

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0087] Example 1

[0088] The thickness of the steel plate in this embodiment is 80mm, the U-shaped groove is set, the gap width at the bottom of the groove is 10mm, and the 6+1 cable welding wire with a diameter of 2.4mm is used, the helix angle is 72°, and the shielding gas is 80% Ar+20%CO2, the welding parameters are shown in Table 2.

[0089] Table 2 Φ2.4mm (6+1) cable welding wire narrow gap gas shielded welding parameters

[0090]

[0091] After welding, the macroscopic metallography shows that the sidewalls are well fused.

Example Embodiment

[0092] Example 2

[0093] The thickness of the steel plate in this embodiment is 80mm, U-shaped grooves are set, the groove gap width is 15mm, and a (6+1) cable welding wire with a diameter of 2.4mm is used. The helix angle is 72° and the shielding gas is 80 %Ar+20%CO2, the welding parameters are shown in Table 3.

[0094] Table 3 Φ2.4mm (6+1) cable type welding wire narrow gap gas shielded welding parameters

[0095]

[0096] The macroscopic metallography shows that the sidewalls are well fused.

Example Embodiment

[0097] Example 3

[0098] The thickness of the steel plate in this embodiment is 80mm, the U-shaped groove is set, the gap width at the bottom of the groove is 10mm, and the (6+1) cable type welding wire with a diameter of 1.8mm is used, the helix angle is 72°, and the shielding gas is 80 %Ar+20%CO2, the welding parameters are shown in Table 4.

[0099] Table 4 Φ1.8mm6+1 cable welding wire narrow gap gas shielded welding parameters

[0100]

[0101] The macroscopic metallography shows that the sidewalls are well fused.

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Abstract

The invention relates to a cable welding wire narrow gap welding method, a protective gas nozzle and a welding gun, and belongs to the technical field of narrow gap welding. The narrow gap welding method comprises the following steps that the specification of a cable welding wire is selected; the cable welding wire is arranged in a welding gun with a cooling structure welding gun head; the weldinggun is connected with a welding machine, protective gas and a circulating cooling liquid tank; and the welding gun is linearly moved along the center line of a narrow gap of welding base metal. Through the narrow gap welding method provided by the invention, during welding, cooling liquid is introduced into the welding gun head, and by lowering the temperature of the welding gun head, the servicelife of a conductive rod is prolonged; and the welding gun is moved linearly along the groove center line of the welding base metal, the advantage of cable welding wire self-rotating arc is fully utilized, various high-cost sidewall fusion control technologies such as wire pendulum, wavy rotation or side seam tracking devices are not used, a layer of welding can be completed by moving the weldingwire along the center line of a narrow gap weld, and the welding production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of narrow gap welding, in particular to a cable-type welding wire narrow gap welding method, a protective gas nozzle and a welding torch. Background technique [0002] Narrow gap welding is a method of mechanized or automatic arc welding for the welding base metal with a thickness of more than 30mm, placing the groove relative to the gap smaller than the thickness of the plate. [0003] At present, narrow gap welding plays a huge role in industrial production in many countries, and has become the preferred technology for welding medium and heavy plate structures in modern industrial production. It has the following technical characteristics: [0004] (1) The cross-sectional area of ​​the weld is reduced by at least 30% compared with the traditional arc welding method; [0005] (2) The groove shape is V-shaped, U-shaped, or I-shaped with a very small groove angle (0.50-7.0); [0006] (3) Generally, single-...

Claims

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Application Information

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IPC IPC(8): B23K9/26B23K9/28B23K9/32
Inventor 李燕京时振王占梅魏宏兵刘冲
Owner SUZHOU YINLI WELDING IND TECH CO LTD
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