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Laser Welding Mode Judgment Method Based on Plasma Electric Signal

A plasma and laser welding technology, which is applied in laser welding equipment, welding equipment, electrical digital data processing, etc., can solve the problem of no judgment welding mode, etc., and achieve the effect of improving accuracy and practicability

Inactive Publication Date: 2017-02-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no detection method for determining the welding mode in the laser welding process.

Method used

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  • Laser Welding Mode Judgment Method Based on Plasma Electric Signal
  • Laser Welding Mode Judgment Method Based on Plasma Electric Signal
  • Laser Welding Mode Judgment Method Based on Plasma Electric Signal

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0031] The acquisition device used in the technical solution of the present invention, as attached figure 1As shown, the device is derived from the equipment in the patent "Passive Electrical Detection Device and Method for Laser Plasma", the application number is 201310513676.6, the publication number is CN103528703A, and the publication date is January 22, 2014.

[0032] Considering that the plasma fluctuations in the laser welding process are relatively severe, and combined with the sampling law, the sampling frequency of the acquisition card is determined to be 150kHz. Considering the synchronism of the acquisition card, the number of channels, the sampling accuracy, the conversion rate and the highest sampling frequency, the present invention determines to select the USB-6211 type acquisition card produced by American Instruments, whose highe...

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Abstract

The invention discloses a laser welding mode determination method based on plasma electric signals. The laser welding mode determination method comprises steps as follows: a passive electric probe is adopted to collect, amplify and filter laser plasma electric signals in a laser welding process; electric signals of the whole welding process under all parameters are compared and analyzed; a probability density distribution diagram is drawn by selecting fixed-length data points in the welding process; relatively more data points are selected to calculate standard deviation. According to the technical scheme, the passive electric probe is adopted to detect the plasma electric signals in the laser welding process, the collected electric signals are subjected to probability density analysis, the probability density distribution diagram is drawn, the standard deviation of the electric signals is calculated, and the determination of the laser welding mode is realized.

Description

technical field [0001] The invention relates to a welding quality detection method in the field of welding technology, in particular to a detection method of welding quality in a laser welding process, especially to a detection method of laser welding mode deep penetration welding and heat conduction welding. Background technique [0002] As a high-quality and efficient welding method, laser welding has attracted people's attention due to its advantages such as high energy density, small heat input, large weld depth-to-width ratio, small welding heat-affected zone, and small deformation. The generation of plasma is an important physical phenomenon in the laser welding process, and its interaction with the laser has a direct impact on the welding process. The plasma is also called laser plasma, which contains a lot of information reflecting the laser welding process. The study of body has important practical significance. [0003] Many parameters in the laser welding process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/24B23K26/70G06F19/00
Inventor 杨立军焦娇刘桐杜笑王会超李桓
Owner TIANJIN UNIV