A clamping tool and a method for capillary pipeline welding using the clamping tool

A capillary and clamping technology, applied in welding equipment, welding accessories, applications, etc., can solve the problems of difficult welding operation, poor welding quality, and difficult control of welding seam parameters, so as to achieve good welding operation environment and internal quality of welding seam High, improve the effect of monitoring ability and control accuracy

Active Publication Date: 2017-04-05
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem solved by the present invention is: to overcome the shortcomings in the prior art, to provide a clamping tool for capillary pipelines, and to adopt argon tungsten arc welding method for welding capillary pipelines, to solve the problem of precise clamping, positioning and welding of capillary pipelines. The seam parameters are not easy to control, the welding quality is poor, and the welding operation is difficult, etc.

Method used

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  • A clamping tool and a method for capillary pipeline welding using the clamping tool
  • A clamping tool and a method for capillary pipeline welding using the clamping tool
  • A clamping tool and a method for capillary pipeline welding using the clamping tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The welding material is stainless steel capillary (capillary outer diameter Φ1.7 / inner diameter Φ0.7), the diameter of the selected tungsten electrode is Φ1.6, the cone length is 5mm, the welding speed is set at 7r / min; the gas flow rate of the welding torch is 15L / min, The welding arc voltage is adjusted to 9V; the welding current is divided into 8 sections, the average welding current of each section is about 8A, the base value current is set to 30% of the peak current, the gas flow in the inner hole is controlled to 1.5L / min, and the gas protection is used hood, the auxiliary gas flow rate is 20L / min, the number of welding turns is 2.5 turns, and the welding time of each section is approximately equal.

[0089] Test results: After welding, the weld depth consistency is good, the fusion width is greater than 0.8, and the weld quality conforms to the second-grade weld standard of QJ2865-1997.

Embodiment 2

[0091] The welding material is stainless steel capillary (capillary outer diameter Φ1.5 / inner diameter Φ0.5), tungsten pole with a diameter of Φ1.6, cone length of 5mm, welding speed set at 5r / min; gas flow rate of welding torch is 10L / min, The welding arc voltage is adjusted to 8V; the welding current is divided into 5 sections, the average welding current of each section is about 7A, the base value current is set to 25% of the peak current, the gas flow in the inner hole is controlled to 1.0L / min, and the gas protection is used hood, the auxiliary gas flow rate is 10L / min, the number of welding turns is about 1.5 turns, and the welding time of each section is approximately equal.

[0092] Test results: After welding, the weld depth consistency is good, the fusion width is greater than 0.8, and the weld quality conforms to the second-grade weld standard of QJ2865-1997.

Embodiment 3

[0094] The welding material is stainless steel capillary (capillary outer diameter Φ1.2 / inner diameter Φ0.4), the diameter is Φ1mm tungsten electrode, the cone length is 4mm, the welding speed is set at 3r / min; the gas flow rate of the welding torch is 10L / min, and the welding arc The voltage is adjusted to 7V; the welding current is divided into 3 sections, the average welding current of each section is 4A, the base value current is set to 20% of the peak current, the auxiliary gas flow rate is 5L / min, and the number of welding turns is about 1 Circle, each section of welding time is approximately equal.

[0095] Test results: After welding, the weld depth consistency is good, the fusion width is greater than 0.8, and the weld quality conforms to the second-grade weld standard of QJ2865-1997.

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Abstract

The invention provides an installing and clamping tool and a method for conducting capillary tube welding through the installing and clamping tool. The installing and clamping tool is used for accurately installing and clamping a capillary tube. The method for conducting capillary tube welding through the installing and clamping tool includes the steps of selecting of argon tungsten-arc welding equipment, workpiece pre-welding washing, installing and clamping of a welding protective device, installing and clamping of a tool mold, installing and clamping of a workpiece, adjusting of a gas flow control device, programming of a welding procedure, workpiece welding, weld joint quality detecting and the like. In addition, in order to achieve welding, high-quality welding of the capillary tube is achieved through the gas flow control device and the welding protective device in the welding process, and wide application prospects are achieved in the field of capillary tube welding.

Description

technical field [0001] The invention belongs to the technical field of welding technology, and relates to a technology method for welding a capillary pipeline by argon tungsten arc welding. Background technique [0002] The techniques for welding small-diameter pipelines mainly include tungsten argon arc welding, plasma arc welding, electron beam, brazing, laser welding and other welding methods. Due to the high cost of electron beam welding and laser welding welding equipment, the mechanical properties of brazed joints are relatively low. At the same time, electron beam welding and brazing welding methods cannot be used for on-site welding, which seriously restricts the on-site welding of pipelines. Both plasma arc welding and argon tungsten arc welding can meet the requirements of on-site welding operations. Due to the high cost of plasma arc welding welding equipment, a large amount of noise, radiation, smoke, etc. are likely to be generated during welding, which is not c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/32B23K9/167
CPCB23K9/167B23K9/32B23K2101/10
Inventor 王文平张志伟黎月明冯豪武胜勇张宽王建李长维
Owner BEIJING INST OF CONTROL ENG
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