Special powder for welding torch with functions of conveying powder and delivering gas

A technology of qigong and powder, which is applied in the field of high-current low-spatter powder and powder for welding. It can solve the problems of poor wire feeding performance compared to solid wire, high manufacturing cost of flux-cored wire, and affecting the stability of the welding process. It is easy to achieve Preparation and promotion, easy promotion, easy effect

Inactive Publication Date: 2014-06-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flux-cored wire requires a higher wire-feeding speed during high-current welding. Because its stiffness is worse than that of solid-cored wire, its wire-feeding performance is not as smooth as that of solid-cored wire, which affects the stability of the welding process.
In addition, the manufacturing cost of flux-cored wire is relatively high, which limits its application.
[0006] The application of the torch with dual functions of powder and gas feeding lays the foundation for stable arc, less spatter, beautiful weld shape, improved welding productivity, and reduced welding production cost under high current welding conditions. However, it is dedicated to powder and gas feeding functions. The high-current and low-spatter powder of the welding torch is rarely reported

Method used

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  • Special powder for welding torch with functions of conveying powder and delivering gas
  • Special powder for welding torch with functions of conveying powder and delivering gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] For the structure of the welding torch see figure 1 . The specific dimensions are as follows:

[0042] A conductive rod is provided on the center line of the welding torch. The conductive rod is a cylinder with an outer diameter of Φ6mm. The inner diameter of the conductive rod is Φ3mm. The conductive rod is made of red copper. The thickness of the insulating layer between the conductive rod and the connector is 1 mm, and the insulator is made of high-temperature-resistant rubber. The nominal diameter of the threaded hole on the lower surface of the conductive rod is M3 (ie 3mm), and the height is 5mm. It is matched with the conductive tip. The conductive tip is a commercially available conductive tip for gas shielded welding.

[0043] The two powder feeding pipes are symmetrically installed on both sides of the conductive rod. The powder feeding pipes are fixed on the connecting piece through two through holes with a diameter of Φ5mm on the connecting piece. The inne...

Embodiment 2

[0053] For the structure of the welding torch see figure 1 . The specific dimensions are as follows:

[0054] A conductive rod is provided on the center line of the welding torch. The conductive rod is a cylinder with an outer diameter of Φ7mm. The inner diameter of the conductive rod is Φ4mm. The conductive rod is made of red copper. The thickness of the insulating layer between the conductive rod and the connector is 2 mm, and the insulator is made of high-temperature-resistant rubber. The nominal diameter of the threaded hole on the lower surface of the conductive rod is M4, and the height is 8mm. It is matched with the conductive tip. The conductive tip is a commercially available conductive tip for gas shielded welding.

[0055] The two powder feeding pipes are symmetrically installed on both sides of the conductive rod. The powder feeding pipes are fixed on the connecting piece through two through holes with a diameter of Φ7mm on the connecting piece. The inner diamete...

Embodiment 3

[0064] For the structure of the welding torch see figure 1 . The specific dimensions are as follows:

[0065] A conductive rod is provided on the center line of the welding torch. The conductive rod is a cylinder with an outer diameter of Φ6.5mm. The inner diameter of the conductive rod is Φ2.5mm. The conductive rod is made of red copper. The thickness of the insulation layer between the conductive rod and the connector is 1.5mm, and the insulator is made of high temperature resistant plastic. The nominal diameter of the threaded hole on the lower surface of the conductive rod is M3 (that is, the nominal diameter is 3mm), and the height is 6mm. It is matched with the conductive tip. The conductive tip is a commercially available conductive tip for gas shielded welding.

[0066] The two powder feeding pipes are symmetrically installed on both sides of the conductive rod. The powder feeding pipes are fixed on the connecting piece through two through holes with a diameter of Φ6...

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Abstract

The invention discloses special powder for a welding torch with functions of conveying powder and delivering gas. The special powder comprises powder materials including, by weight, from 20 to 35 parts of rutile, from 5 to 8 parts of potassium feldspar, from 0 to 3 parts of potassium titanate, from 0 to 5 parts of sodium fluorosilicate, from 0 to 2 parts of sodium fluoride, from 0 to 8 parts of ferrotitanium and from 0 to 6 parts of cerium oxide rare earth (CeO2), wherein the powder materials are uniformly mixed to prepare the powder. By means of using the powder with the welding torch with the functions of conveying powder and delivering gas and delivering the shielding gas to a welding zone, purposes of stabilizing electric arc during welding and reducing splashing during high-current gas shielded welding can be realized. Besides, the raw materials of the powder can be obtained easily, cost is low, and the special powder can be prepared and popularized easily.

Description

technical field [0001] The invention relates to a medicinal powder for welding, in particular to a high-current and low-splash medicinal powder specially used for a welding torch with the function of powder feeding and gas feeding; it belongs to the field of welding materials. Background technique [0002] High current gas metal arc welding (GMAW) is a new, fast and efficient gas shielded technology. As the welding current increases, the melting speed of the welding material will increase significantly. When the welding current exceeds the critical current of the rotating jet transfer, the droplet transfer becomes an unstable rotating jet transfer form. At this time, a large amount of spatter is generated, and the large particle spatter occupies a large proportion, the weld shape is poor, and the working conditions are extremely poor. , has no practical application value. Spattering not only wastes welding materials, but also increases the workload to clean up the spatter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K9/28B23K9/16
Inventor 孙俊生李梦实焦恩理
Owner SHANDONG UNIV
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