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A method of controlling the cathodic cleaning area in the aluminum alloy welding process

A cathode cleaning and welding process technology, applied in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problem of reducing welding quality and achieve the effect of preventing damage to welding quality

Active Publication Date: 2020-08-28
CHINALCO MATERIALS APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during arc welding, the jumping range of the cathode spot is affected by many factors (current, voltage, welding speed, shielding gas, reverse connection ratio), and the jumping range is too large or too small will reduce the welding quality

Method used

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  • A method of controlling the cathodic cleaning area in the aluminum alloy welding process
  • A method of controlling the cathodic cleaning area in the aluminum alloy welding process
  • A method of controlling the cathodic cleaning area in the aluminum alloy welding process

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A method for controlling a cathode cleaning area during aluminum alloy welding, comprising the following steps:

[0023] 1) Connect the aluminum alloy butt plate to be welded to the negative pole of the MIG welding machine, and the welding wire is the positive pole;

[0024] 2) Set the welding current to 150A and the welding speed to 12mm / s;

[0025] 3) Use a beam conversion device or three lasers to provide three laser beams with a power of 300W, and the three laser beams are distributed evenly at the front, left and right positions 3mm from the edge of the molten pool;

[0026] 4) Each beam is zero defocus;

[0027] 5) Cooperatively control the beam conversion device or laser and welding machine to ensure that the laser can form a heat emission point during the welding process, and the power density of the three laser beams is adjusted to 10 6 / cm 2 Above, the distance between the heat emission points where the three laser beams act and the center of the molten poo...

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Abstract

The invention discloses a method for controlling a cathode cleaning area in the aluminum alloy welding process. The method is characterized in that during aluminum alloy electric arc welding, when a to-be-welded workpiece is connected with a cathode, three beams of lasers acting on the front face and the two sides of a molten pool correspondingly are adopted for adjusting the range of the cathodecleaning area. According to the method, the width and the cleaning range of the cleaning area can be freely controlled, and damage of too large or too small cathode spot dancing to welding quality isavoided; during corner joint, the cleaning area can be prevented from deviating to a certain side through laser guide; and the requirement for the laser power density is low, and the effect of guidingcathode spots can be achieved through the low-power lasers being about 300 W.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy welding, and in particular relates to a method for controlling the cathode cleaning area in the aluminum alloy welding process. Background technique [0002] The aluminum alloy surface is covered with a layer of dense Al 2 o 3 If the oxide film is not cleaned up, it will cause slag inclusions, pores and lack of fusion, which will affect the mechanical properties of the weld. During the arc welding process, the cathode spot tends to automatically find and remove the oxide film, forming a bright strip-shaped cathode cleaning area, which is called cathode cleaning. However, during arc welding, the jumping range of the cathode spot is affected by many factors (current, voltage, welding speed, shielding gas, reverse connection ratio), and the jumping range is too large or too small will reduce the welding quality. Contents of the invention [0003] Aiming at the deficiencies in the prior ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K103/10
CPCB23K9/0026B23K9/173
Inventor 苗海宾李超范荣辉王苗苗
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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