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Method for determining full penetration laser welding process parameter of sheet

A technology with process parameters and full penetration, used in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of unstable welding seam formation, long cycle, high cost, and ensure welding seam quality, short working cycle, high cost, etc. The effect of low welding cost

Inactive Publication Date: 2010-12-08
BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When high-power laser welding is used for metal sheet welding, it is a deep penetration welding mode. In practical applications, even if the welding process parameters are stable, full penetration laser welding will also cause process instability and unstable weld formation. Therefore, the existing The method of determining the process parameters is not easy to ensure the quality of the weld
Moreover, metallographic sampling analysis is required for the sample weld, resulting in long cycle time and high cost

Method used

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  • Method for determining full penetration laser welding process parameter of sheet
  • Method for determining full penetration laser welding process parameter of sheet
  • Method for determining full penetration laser welding process parameter of sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1: Titanium Alloy Sheet CO 2 Laser welding

[0058] 1. Conditions of the embodiment: a thin titanium alloy plate with a plate thickness of 2.5 mm;

[0059] 2. The establishment of a process parameter window for full penetration laser welding of thin plates;

[0060] 2.1. Establish a coordinate system of laser welding process parameters; the ordinate is the laser power, and the abscissa is the welding speed;

[0061] 2.2. Conduct laser welding process test;

[0062] Using high power CO 2 Laser welding machine for laser full penetration welding;

[0063] 2.2.1. Determine the laser defocus amount; the laser defocus amount is in the range of -1mm to 1mm. When the focus of the laser beam is located on the front of the metal plate to be welded, the defocus amount is 0. When the focus of the laser beam is located below the front of the metal plate to be welded The amount of defocus is negative, otherwise it is positive;

[0064] 2.2.2. Determine the laser power p...

Embodiment 2

[0082] Embodiment 2: YAG laser welding of titanium alloy sheet

[0083] 1. Conditions of the embodiment: a thin titanium alloy plate with a plate thickness of 2.5 mm;

[0084] 2. The establishment of a process parameter window for full penetration laser welding of thin plates;

[0085] 2.1. Establish a coordinate system of laser welding process parameters; the ordinate is the laser power, and the abscissa is the welding speed;

[0086] 2.2. Conduct laser welding process test;

[0087] High-power YAG laser welding machine is used for laser full penetration welding;

[0088] 2.2.1. Determine the laser defocus amount; the laser defocus amount is in the range of -1mm to 1mm. When the focus of the laser beam is located on the front of the metal plate to be welded, the defocus amount is 0. When the focus of the laser beam is located below the front of the metal plate to be welded The amount of defocus is negative, otherwise it is positive;

[0089] 2.2.2. Determine the laser pow...

Embodiment 3

[0107] Embodiment 3: YAG laser welding of aluminum-lithium alloy sheet

[0108] 1. Conditions of the embodiment: an aluminum-lithium alloy thin plate with a plate thickness of 3 mm;

[0109] 2. The establishment of a process parameter window for full penetration laser welding of thin plates;

[0110] 2.1. Establish a coordinate system of laser welding process parameters; the ordinate is the laser power, and the abscissa is the welding speed;

[0111] 2.2. Conduct laser welding process test;

[0112] High-power YAG laser welding machine is used for laser full penetration welding;

[0113] 2.2.1. Determine the laser defocus amount; the laser defocus amount is in the range of -1mm to 1mm. When the focus of the laser beam is located on the front of the metal plate to be welded, the defocus amount is 0. When the focus of the laser beam is located below the front of the metal plate to be welded The amount of defocus is negative, otherwise it is positive;

[0114] 2.2.2. Determin...

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Abstract

The invention belongs to laser welding technology, and relates to a method for determining a process parameter during full penetration laser welding of a metal sheet with the thickness of less than 3 millimeters. The method for determining the process parameter is characterized by comprising the following steps of: defining; establishing a full penetration laser welding process parameter window of the sheet; and determining the full penetration laser welding process parameter of the sheet. The method can ensure weld quality, does not need metallographic phase sampling analysis, and has short work period and low welding cost.

Description

technical field [0001] The invention belongs to the laser welding technology, and relates to a method for determining process parameters during full-penetration laser welding for thin metal plates with a thickness less than 3mm. Background technique [0002] The process parameters that affect the quality of full penetration laser welding of metal sheets mainly include laser power, welding speed and defocus (the distance between the focal point and the surface of the material). At present, the determination method of laser power, welding speed and defocus is as follows: the simple correspondence between laser power, welding speed and defocus and weld penetration or weld width is obtained through welding process test. In most cases, the defocus amount is 0, and under the established different laser power conditions, the laser power and welding speed of thin plate penetration welding are determined by using the relationship curve between welding speed and weld penetration depth...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/42B23K26/70
Inventor 陈俐巩水利姚伟
Owner BEIJING AERONAUTICAL MFG TECH RES INST
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