Automatic tungsten argon arc welding method for small diameter titanium pipe

A technology of argon tungsten arc welding and welding method, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of low production efficiency, long welding operation time, high labor intensity, etc. The effect of stable quality and high welding pass rate

Inactive Publication Date: 2011-12-07
SINOPEC THE FOURTH CONSTR
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Problems solved by technology

[0002] At present, in the field of petrochemical engineering construction, the traditional welding method of titanium pipeline (TA2) mainly adopts manual argon tungsten arc welding GTAW; due to the traditional manual welding, the welding operation time is long, the labor intensity is high, and the production efficiency is low

Method used

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Embodiment Construction

[0019] In order to further understand the content of the invention, features and effects of the present invention, the following examples are given hereby, and the details are as follows:

[0020] An automatic argon tungsten arc welding method for small-diameter titanium pipes (DN≤400mm), comprising the following steps:

[0021] 1 preparation before welding

[0022] 1.1 Welding materials

[0023] 1) The welding wire adopts TA2 welding wire with the same composition as the base metal, the model is ERTi2, and the diameter of the welding wire is φ1.2mm.

[0024] 2) Protective gas - the purity of argon must be above 99.99%, and the water content should not exceed 50mg / m 3 .

[0025] 3) Plastic hose should be used for the air supply pipe, and rubber hose should not be used to prevent the welding joint from being polluted by rubber particles.

[0026] 4) The tungsten electrode is made of cerium tungsten electrode. The diameter of the tungsten electrode should be selected accordi...

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Abstract

The invention discloses an automatic tungsten argon arc welding method for a small-diameter titanium pipe, which comprises the following steps: placing the pipe on a rolling tire, and using an automatic tungsten argon arc welding machine to weld it; The welding wire is cleaned; when welding, the rolling tire rotates to drive the pipe to rotate, and the welding torch is in the flat welding position and remains still. The welding process parameters are: welding current: 80-100A, voltage: 10-16V, welding speed: 8 ~10cm / min, the flow rate of argon gas in the nozzle of the torch is 10~15L / min; the extension length of the welding wire is 8~12mm; the tungsten electrode adopts cerium tungsten electrode. The invention has stable welding quality, high welding qualified rate and fast welding speed.

Description

technical field [0001] The invention belongs to the technical field of pipeline welding, in particular to an automatic tungsten argon arc welding method for small-diameter titanium pipelines (DN≤400mm). Background technique [0002] At present, in the field of petrochemical engineering construction, the traditional welding method of titanium pipeline (TA2) mainly adopts manual argon tungsten arc welding GTAW; due to the traditional manual welding, the welding operation time is long, the labor intensity is high, and the production efficiency is low. Contents of the invention [0003] The present invention provides an automatic tungsten argon arc welding method for small-diameter titanium pipes (DN≤400mm) in order to solve the technical problems in the known technology. The welding method can greatly reduce labor intensity; improve welding production efficiency, and better To ensure the quality of welding. [0004] The technical solution adopted by the present invention for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/235
Inventor 李雪梅吴卫
Owner SINOPEC THE FOURTH CONSTR
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