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

A composite welding and mechanical vibration technology, applied in welding equipment, laser welding equipment, welding/welding/cutting items, etc., can solve the problems of low welding quality and easy gas generation, achieve flexible process, improve interface connection strength, Effect of reducing welding distortion

Active Publication Date: 2021-09-21
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 porosity assisted by mechanical vibration
  • High-nitrogen steel composite welding device and method for reducing porosity assisted by mechanical vibration
  • High-nitrogen steel composite welding device and method for reducing porosity 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

A device and method for mechanical vibration-assisted reduction of air holes in high-nitrogen steel composite welding, belonging to the field of welding technology, the laser welding head of the laser welding device is installed on a six-axis linkage robot through a flange and a support plate, and connected to a laser; The welding workpiece is fixed on the welding workbench in the form of butt joint, the laser beam emitted by the laser welding head is coaxial with the gap between the workpiece to be welded, and the welding torch is placed on the front of the workpiece to be welded; The supporting spring is connected with the connecting rod, and the vibration sensor detects the vibration frequency and feeds it back to the vibration aging control device to control the vibration frequency in real time. The welding seam of two high workpieces to be welded is processed into two identical curve shapes, and the robot control system controls the six-axis linkage robot to drive the laser welding head to weld with the curve as the movement track. The welding method of the invention 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 Patents(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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