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Gas protection method and apparatus for rotating arc narrow gap welding

A rotating arc and gas shielding technology, applied in arc welding equipment, welding equipment, welding accessories, etc., can solve the complex shape and structure of the external box-shaped nozzle, unfavorable observation of the welding arc and molten pool, and low adjustment accuracy of the height adjustment device etc. to achieve the effects of improving observability, simplifying the design of the air supply mechanism, and light weight

Active Publication Date: 2006-07-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this mechanism are: ①The shape and structure of the external box-shaped nozzle are relatively complex, and the volume is large; ②The arc is poorly observable, which is not conducive to the operator to observe the state of the welding arc and the molten pool in real time; ③The external nozzle There is no water cooling measure, and the adjustment accuracy of the height adjustment device is low

Method used

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  • Gas protection method and apparatus for rotating arc narrow gap welding
  • Gas protection method and apparatus for rotating arc narrow gap welding
  • Gas protection method and apparatus for rotating arc narrow gap welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 is suitable for providing gas shielding for the upper several layers of weld passes and cover welds of narrow gap grooves. Depend on figure 1 and figure 2 It can be seen that the present invention includes 1-adjusting hand wheel, 2-positioning nut, 3-flat nozzle seat, 4-locking screw, 5-flat nozzle, 6-guide groove, 7-carriage plate, 8-conductive rod, 9-Cooling water inlet, 10-Water-cooled nozzle seat, 11-Sleeve-shaped nozzle air inlet, 12-Sleeve-shaped nozzle, 13-Welding wire, 14-Electric arc, 15-Cooling water outlet, 16-Sliding groove, 17 -Nozzle connector, 18-locking handwheel, 19-connector, 20-adjusting rod, 21-gear, 22-rack, 23-support plate, 24-air inlet of flat nozzle, 25-guiding wheel.

[0015] Such as figure 1 As shown, it includes an air intake pipeline, a composite nozzle, and the composite nozzle includes a protruding flat nozzle (5) and its position adjustment mechanism, an external sleeve-shaped nozzle (12) and its height adjustment mechani...

Embodiment 2

[0017] Embodiment 2 is suitable for providing gas protection for the weld bead deep in the narrow gap groove. Depend on image 3 It can be seen that, with respect to embodiment 1, embodiment 2 has unloaded sleeve-shaped nozzle (12), increased dust cover (26), and all the other parts are the same as embodiment 1. Such as image 3 As shown, by adjusting the handwheel (1) to drive the carriage (7), the height of the water-cooled nozzle seat (10) is raised to expose a sufficiently long conductive rod (8) and eccentric conductive tip (27), so that the flat nozzle (5 ) into the depth of the narrow gap groove to supply air; at the same time, loosen the locking screws (4) on the flat nozzle seats (3) on both sides, and adjust the position of the flat nozzle (5) so that it is close to the welding arc (14). Therefore, effective gas shielding is implemented for the rotary arc welding area deep in the narrow gap groove to form high-quality welded joints.

Embodiment 3

[0018] Embodiment 3 is suitable for providing gas shielding for the upper layers of welds and cover welds of narrow gap grooves, and can also be used for other rotary arc welding occasions such as open groove welding and fillet welding. Compared with Example 1, the protruding flat nozzles (5) and their connectors (17) on both sides have been removed, and the positioning nut (2), flat nozzle seat (3), and locking screw (4) have been removed. The flat nozzle position adjustment mechanism that etc. constitute, all the other parts are the same as embodiment 1.

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Abstract

The invention relates the gas protection method and device used for rotating arc narrow gap welding. The method comprises the following steps: adopting the symmetrical reentrant fan nozzles distributed on the two sides of arc, leading the protection gas from the nozzles along the two sides of rotating arc to protect the welding seam; when ignition tip being close to the work surface or out of fusion face, adopting external telescopic nozzles. The invention has good practicability and low cost, and the observability of arc and fused bath is good. The device possesses simple structure and convenient maintenance.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a gas shielding method and device for rotary arc narrow gap welding. Background technique [0002] Narrow gap MIG welding is an efficient and high-quality welding method suitable for large and thick plates. High-speed rotary arc narrow gap welding is a new narrow gap welding process. It uses mechanical methods to rotate the conductive rod of the torch around its own axis to drive the arc that passes through the end of the welding wire from the eccentric conductive tip to perform a rotary scanning motion, thereby obtaining Uniform and stable penetration of both sides of the wall solves the problem of poor fusion of both sides of the wall during narrow gap welding. How to implement reasonable and effective gas shielding in the welding area is one of the key technologies to realize high-quality rotary arc narrow gap welding. [0003] The existing gas shielding method and device i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/022B23K9/32
Inventor 王加友杨峰国宏斌
Owner JIANGSU UNIV OF SCI & TECH
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