Pulse burial arc welding process and welding device for boiler membrane type tube panels and tube rows

A submerged arc welding machine and membrane-type technology, which is applied in welding equipment, arc welding equipment, metal processing equipment, etc., can solve the problems of increasing the manufacturing cost of fins, failing to meet the requirements of welding penetration, and increasing the difficulty of welding and assembly. Achieve the effect of improving welding quality, meeting production requirements, and improving weld formation

Active Publication Date: 2006-01-04
SHANGHAI BOILER WORKS
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Problems solved by technology

However, when the thickness of the fins used in the water wall of the supercritical boiler reaches 9.5 mm, the original welding process cannot meet the technical requirements of the product, and both sides of the fins must be grooved, which will ine

Method used

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  • Pulse burial arc welding process and welding device for boiler membrane type tube panels and tube rows
  • Pulse burial arc welding process and welding device for boiler membrane type tube panels and tube rows
  • Pulse burial arc welding process and welding device for boiler membrane type tube panels and tube rows

Examples

Experimental program
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Effect test

Example Embodiment

[0016] The embodiment takes the welding of 38×7 water-cooled wall tubes and fins with a thickness of 9.5 mm as an example.

[0017] like figure 1 Shown is the schematic diagram of the pulse submerged arc welding machine for the boiler membrane tube and screen tube row. 5. The welding wire 6 and the welding tool 7 are composed. Four welding power sources 3 are installed on the upper end of the beam 12 of the welding frame 4, and are connected to the welding machine switch 10 on the welding frame 4. The upper end of each welding power source 3 is provided with an arc The pulse controller 1 is connected to the welding power source 3 through the connection line 2. The lower end of each welding power source 3 is provided with a welding gun. The wire feeding mechanism 5 is installed on the welding frame 4, and the welding wire 6 sent by the wire feeding mechanism 5 passes through each A welding torch is provided with a guide rail 11 at the lower end of the welding frame 4 , two wel...

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Abstract

The pulse submerged arc welding process for membrane type boiler tube bank features that the welding process includes the steps of: setting welding current, welding voltage and welding speed in the welding power supply; regulating the pulse frequency, pulse width ratio, base current and voltage, peak current and voltage in the arc pulse controller; regulating the relative positions of water cooling wall and the fins on the tracks of the welding machine and clamping the water cooling wall and the fins with the fixture; moving the beam to the end of the water cooling wall and regulating the angle of welding gun and welding wire; and welding while moving the beam until completing the welding of the whole water cooling wall pipe. The welding apparatus is one pulse submerged arc welding machine comprising power supply, frame, welding wire feeding mechanism, welding wire and fixture, and features that each welding power supply is provided with one arc pulse controller.

Description

technical field [0001] The invention relates to a pulse submerged arc welding process and welding equipment for a boiler membrane tube panel tube row, which can be used for the welding of tube rows in the boiler manufacturing industry and belongs to the technical field of water-cooled wall manufacturing technology. Background technique [0002] A few days ago, domestic supercritical power plant boilers have been greatly developed, and the demand for products is extremely strong. But supercritical product structure is very different from subcritical boiler. Generally, the thickness of the fins used in the water wall of subcritical boilers is basically 6mm, and the welding speed is 0.9-1.1m / min. However, when the thickness of the fins used in the water wall of the supercritical boiler reaches 9.5 mm, the original welding process cannot meet the technical requirements of the product, and both sides of the fins must be grooved, which will inevitably make the annealed disc fins ...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K9/09
Inventor 王炯祥刘信诠赵伟珍
Owner SHANGHAI BOILER WORKS
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