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Pulse MIG swing welding process for nickel-based alloy die steel thick plate

A technology of nickel-based alloy and welding process, which is applied in welding medium, welding equipment, metal processing, etc., can solve the problems of incomplete promotion of production and application, achieve good transplantability and reference significance, improve mechanical properties and airtight properties, The effect of shortening the teaching time

Inactive Publication Date: 2021-06-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, welding robots or robotic arms such as Panasonic, KUKA, and ABB can already support various swing welding trajectories, but the production and application of this technology has not been fully promoted in China

Method used

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  • Pulse MIG swing welding process for nickel-based alloy die steel thick plate
  • Pulse MIG swing welding process for nickel-based alloy die steel thick plate
  • Pulse MIG swing welding process for nickel-based alloy die steel thick plate

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Experimental program
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Effect test

Embodiment 1

[0028] The welding base metal is made of die steel with a Ni content of 35.67%, with a size of 100mm × 50mm × 19.05mm, a 60° bevel, a blunt edge thickness of 1mm, and a spacing of 1.8mm; the welding wire is M93, with a Ni content of 36.20% and a diameter of 1.2mm. The flexible clamping is adopted, the reserved anti-deformation angle is 2°, and the flow rate of the argon-rich atmosphere is 18L / min; the welding equipment is the TAWERS-1400 integrated welding robot produced by Tangshan Panasonic, the welding torch is perpendicular to the workpiece to be welded, and the direct current connection is adopted; Before welding, grind the groove of the workpiece and wipe with acetone to remove the oxide film and impurities on the surface; after that, teach the welding track and set the parameters. The specific parameters are as follows:

[0029] ●The first layer: straight track, welding current 235A, welding voltage 26.3V, speed 0.36m / min;

[0030] The second layer: simple low-speed swi...

Embodiment 2

[0038] The welding base metal is made of die steel with a Ni content of 35.67%, with a size of 250mm × 250mm × 19.05mm, a 60° groove, a blunt edge thickness of 1mm, and a spacing of 1.6mm; the welding wire is M93, with a Ni content of 36.20% and a diameter of 1.2mm. The flexible clamping is adopted, the reserved reverse deformation angle is 1.9°, and the flow rate of the argon-rich atmosphere is 18L / min; the welding equipment is the TAWERS-1400 integrated welding robot produced by Tangshan Panasonic, the welding wire is inclined forward 10°, and the direct current connection is adopted; welding; The left and right directions alternate with each other; before welding, grind the groove of the workpiece and wipe with acetone to remove the oxide film and impurities on the surface; then teach the welding track and set the parameters. The specific parameters are:

[0039] ●The first layer: straight track, welding current 240A, welding voltage 27.3V, speed 0.38m / min;

[0040] The sec...

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Abstract

The invention relates to a pulse MIG swing welding process for a nickel-based alloy die steel thick plate. The pulse MIG swing welding process comprises the following steps that a welding material is selected; welding equipment is selected; the shape of a groove of the nickel-based alloy die steel thick plate weldment is designed and preparing is carried out before welding; a multi-layer single-pass automatic welding path of the nickel-based alloy die steel thick plate is planned; and the nickel-based alloy die steel thick plate multi-layer pulse and swing MIG automatic welding process parameters are designed. According to the pulse MIG swing welding process for the nickel-based alloy die steel thick plate, the pulse MIG electric arc swing welding technology is reasonably adopted, and welding of the large-thickness nickel base alloy die steel special for aircraft composite die manufacturing is achieved. For die steel with the thickness of 19.05 mm, five layers are adopted under the low welding current, and one weld joint is adopted for each layer, so that good forming is achieved; the surface of the weld joint presents staggered fish scale patterns, no surface defects such as air holes, spattering and cracks exist, and the back is completely welded; the section of the weld joint is free of pores, cracks and inclusions, weld joint-base metal and adjacent layers of weld joints are well fused, no obvious grain boundary exists, and impurities in a molten pool are effectively purified; and after welding, the angular deformation is obviously reduced, and the good process adaptability of the pulse MIG swing welding technology to the nickel-based alloy die steel thick plate is embodied.

Description

technical field [0001] The process patent of the present invention relates to an automatic thick plate welding process based on an arc welding robot, in particular to a pulse MIG swing welding process of nickel-based alloy thick plate steel, an important aircraft composite mold manufacturing material, which belongs to nickel-based alloy welding technical field. Background technique [0002] Due to its high specific strength and good fatigue performance, composite materials have become one of the basic materials for the manufacture of large aircraft, and the preparation technology of composite materials has also become one of the key technologies for the development of advanced large aircraft. Aircraft composite parts are mainly hot-pressed in a specific mold, and then the outer surface of the parts is generally no longer machined, so higher requirements are placed on the mold material: thermal expansion coefficient similar to the composite material, temperature change and G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/09B23K9/095B23K9/02B23K35/30
CPCB23K9/173B23K9/09B23K9/095B23K9/02B23K35/3066B23K2101/18B23K2103/04
Inventor 陈纪城郭凯刘湘波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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