A rotary submerged arc high-speed welding method for thin plates

A welding method and submerged arc welding technology, applied in welding equipment, arc welding equipment, welding/welding/cutting articles, etc., can solve the problems of high deposition efficiency of submerged arc welding, complicated welding method implementation, and expensive welding equipment, etc. Achieve significant economic superiority, easy engineering promotion, and prevent weld penetration defects

Active Publication Date: 2022-05-13
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low welding efficiency, complex welding method implementation and expensive welding equipment for the current welding technology that is difficult to meet the high-speed welding requirements of thin plates, and comprehensively utilize the low assembly requirements of rotary arc welding groove and the deposition efficiency of submerged arc welding high-speed welding method for thin plates is proposed

Method used

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  • A rotary submerged arc high-speed welding method for thin plates
  • A rotary submerged arc high-speed welding method for thin plates
  • A rotary submerged arc high-speed welding method for thin plates

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Experimental program
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Effect test

Embodiment 1

[0046] Figure 8 Shown are the front and back weld formation photos of two thin plates 6 to be welded with a plate thickness δ of 2mm after high-speed rotary submerged arc butt welding. in, Figure 8 (a) and Figure 8 (b) are the assembly gap G 1 1mm, misalignment amount C 1 The front and back welding seam forming photos when it is 0.5mm, the width G of the forming groove 7-1 of the copper backing plate 7 used at this time 2 3mm, depth h 2 The set welding current I is 370A, the arc voltage is 35V, the arc rotation speed n is 4500r / min, the arc rotation radius r is 2mm, and the welding speed V w It is 2300mm / min. Figure 8 (c) and Figure 8 (d) are the assembly gap G 1 0mm, misalignment amount C 1 The front and back welding seam forming photos when it is 0.2mm, the width G of the forming groove 7-1 of the copper backing plate 7 used at this time 2 4mm, depth h 2 The set welding current I is 440A, the arc voltage is 36V, the arc rotation speed n is 6000r / min, the arc ...

Embodiment 2

[0049] Such as Figure 4 As shown, the two thin plates 6 to be welded with the thickness δ of 3mm and 4mm are assembled into a lap groove form, and the assembly gap G 1 It is 0.5mm. Before welding, use a welding pressure plate to press the two thin plates 6 to be welded to be welded on the lifting backing plate 7-2 and the steel fixed backing plate 7-4 respectively. On the lifting backing plate 7-2 There are nine lifting platforms 7-3 evenly placed in three rows along the welding direction below. Before welding, adjust the torch inclination α of the rotary submerged arc welding torch 1 above the lap joint 1 30°, upper offset distance C 2 0mm, right offset distance C 3 is 0mm, the set welding current I is 350A, the arc voltage is 32V, the arc rotation speed n is 3000r / min, the arc rotation radius r is 2mm, and the welding speed V w It is 3000mm / min. After high-speed rotary submerged arc welding, a thin plate lap joint with good shape and meeting the requirements of use is ...

Embodiment 3

[0051] Such as Figure 5 As shown, the two thin plates 6 to be welded with a thickness δ of 5mm are assembled into a fillet groove form, and the assembly gap G 1 Before welding, use a welding pressure plate to press the two thin plates 6 to be welded on the copper backing plate respectively, and the four corners are respectively set with a width G along the welding direction. 2 3mm, depth h 2 1.5mm forming groove 7-1. Before welding, adjust the torch inclination α of the rotary submerged arc welding torch 1 above the fillet joint groove 1 60°, upper offset distance C 2 2.5mm, right offset distance C 3 The set welding current I is 500A, the arc voltage is 38V, the arc rotation speed n is 7200r / min, the arc rotation radius r is 4mm, and the welding speed V w It is 1000mm / min. After high-speed rotary submerged arc welding, a well-formed thin-plate fillet joint that meets the requirements of use is obtained.

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Abstract

The invention discloses a rotary submerged arc high-speed welding method for thin plates. The steps are: press the assembled thin plates to be welded on the welding backing plate along the welding direction, and then select and match them according to the material of the thin plates to be welded. flux and welding wire, and set the rotary submerged arc welding method and process parameters according to the plate thickness and groove form of the thin plate to be welded. The torch drives the welding arc to rotate at a constant speed inside the flux according to the set rotation speed and direction, and at the same time, the drag mechanism drives the rotating submerged arc welding torch to move to the welding front as a whole, realizing high-speed rotary submerged arc welding of thin plates. The invention has low implementation cost, can remarkably increase the welding speed of a single welding wire arc, and reduces welding assembly requirements, and is especially suitable for thin plate welding occasions.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a rotary submerged arc high-speed welding method for thin plates. Background technique [0002] For thin plate welding widely used in thin-walled parts such as locomotives and ships, commonly used automatic welding methods include melting electrode (or non-melting electrode) gas shielded welding, laser welding, friction stir welding, etc. Among them, the implementation cost of conventional melting pole (or non-melting pole) gas shielded welding is low, but the welding heat input control requirements are high; the welding speed of laser welding is fast, but the assembly requirements are high, the welding system is complicated and expensive; the friction stir welding The welding position is limited, the material of the stirring needle is special, and the performance requirements are high. [0003] The Chinese invention patent number is "ZL201310387751.9", and the title is "a lase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/18B23K9/025B23K33/00B23K101/18
CPCB23K9/18B23K9/025B23K33/004B23K2101/185
Inventor 朱杰王加友张陆霄姜玉清王纳林登强
Owner JIANGSU UNIV OF SCI & TECH
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