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High-nitrogen steel composite welding device and method for reducing air holes assisted by mechanical vibration

A hybrid welding and mechanical vibration technology, used in welding equipment, laser welding equipment, welding/welding/cutting items, etc., can solve the problem of easy gas generation, low welding quality, etc., to improve the interface connection strength, process flexibility, reduce The effect of welding deformation

Active Publication Date: 2020-01-14
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above technical problems, the present invention proposes a high-nitrogen steel compound welding device and method for reducing pores assisted by mechanical vibration, so as to solve the problems of high-nitrogen steel that easily generates gas and poor welding quality in the welding process in the prior art

Method used

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  • High-nitrogen steel composite welding device and method for reducing air holes assisted by mechanical vibration
  • High-nitrogen steel composite welding device and method for reducing air holes assisted by mechanical vibration
  • High-nitrogen steel composite welding device and method for reducing air holes assisted by mechanical vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1: Mechanical vibration assists in reducing porosity in composite welding of 8mm thick high nitrogen steel

[0074] Use an angle grinder to remove the oxide film on the surface of the two high-nitrogen steel plates to be welded, and then use acetone to remove the surface oil;

[0075] Install and debug the device, clamp the two high-nitrogen steel plates to be welded on the welding table in the form of butt joint, prefabricate the 30° groove and 4mm blunt edge of the high-nitrogen steel plate to be welded, and prefabricate the welding gap between the two plates of the workpiece to be welded. 0.8mm;

[0076]Apply mechanical vibration under the high-nitrogen steel plate to be welded, and use laser vertical irradiation welding above the metal material to be welded. The laser power is 3KW, and the defocus of the laser beam is -2mm; the welding torch is welded on the front of the welding workpiece, and the type of welding torch is MIG. ; The arc welding current of t...

Embodiment 2

[0078] Example 2: Mechanical vibration assists in reducing porosity in composite welding of 12 mm thick high nitrogen steel

[0079] Use an angle grinder to remove the oxide film on the surface of the two high-nitrogen steel plates to be welded, and then use acetone to remove the surface oil;

[0080] Install and debug the device, clamp the two high-nitrogen steel plates to be welded on the welding table in the form of butt joint, prefabricate the 30° groove and 5mm blunt edge of the high-nitrogen steel plate to be welded, and prefabricate the welding gap between the two plates of the workpiece to be welded. 0.6mm;

[0081] Apply mechanical vibration under the high-nitrogen steel plate to be welded, and use laser vertical irradiation welding above the metal material to be welded. The laser power is 4KW, and the defocus of the laser beam is -2mm; the welding torch is welded on the front of the welding workpiece, and the type of welding torch is MIG. ; The arc welding current o...

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Abstract

The invention discloses a device and method for reducing high-nitrogen steel composite welding air holes assisted by mechanical vibration, and belongs to the technical field of welding. A laser welding head of a laser welding device is mounted on a six-axis linkage robot through a flange and a support plate and is connected with a laser; two workpieces to be welded are fixed to a welding workbenchin a butt joint mode, a laser beam generated by the laser welding head is coaxial with a gap between the workpieces to be welded, and a welding gun is arranged on the front surfaces of the workpiecesto be welded; and the welding workbench is fixed to a vibration test bench, the vibration test bench is connected with a connecting rod through a supporting spring, and a vibration sensor detects vibration frequency and feeds the vibration frequency back to a vibration aging control device to control the vibration frequency in real time. Welding seams of the two high workpieces to be welded are processed into the welding seams with two same curve shapes, and a robot control system controls the six-axis linkage robot to drive the laser welding head to carry out welding by taking the curves asmotion tracks. The welding method effectively improves the welding quality.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a high-nitrogen steel composite welding device and method for reducing pores with the aid of mechanical vibration. Background technique [0002] High-nitrogen austenitic stainless steel (high-nitrogen steel) is a new type of steel that uses nitrogen to partially or completely replace expensive nickel as the main austenitizing element. High nitrogen steel has been widely used in military, vehicle, medical and marine fields. However, in the process of fusion welding, due to the change of the solubility of solid solution nitrogen, problems such as pores often appear in the weld. Problems such as pores will lead to a decrease in the mechanical properties of the welded joint and a decrease in the corrosion resistance of the weld, which has become the main factor restricting the popularization and application of high nitrogen steel. [0003] Laser-arc hybrid welding is a new welding m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/60B23K26/08B23K26/70B23K26/24
CPCB23K26/0884B23K26/24B23K26/348B23K26/60B23K26/702B23K2103/04
Inventor 刘凤德李星燃张宏白頔刘双宇石岩刘佳崔博
Owner CHANGCHUN UNIV OF SCI & TECH
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