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Laser process testing method and special instrument

A detection method and laser processing technology, applied in the direction of instruments, scientific instruments, laser welding equipment, etc., can solve the problems of complex process, low efficiency, inaccurate temperature detection in the processing area, etc., and achieve the effect of simple method and equipment and high efficiency

Inactive Publication Date: 2008-08-20
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has two main problems: first, the process of three-dimensional contour measurement and the preparation of NC programs based on three-dimensional contours is complex and inefficient; Impact
As a result, the temperature detection in the processing area is inaccurate and the laser spot size in the processing area is inaccurately controlled.

Method used

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  • Laser process testing method and special instrument

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Embodiment Construction

[0022] Referring to the attached picture:

[0023] The laser processing detection method of the present invention comprises the following steps:

[0024] 1. The non-contact rangefinder pre-measures the flatness change data of the workpiece surface to be processed;

[0025] 2. According to the flatness change data of the surface to be processed, the mobile platform dynamically adjusts the positions of the laser focusing head and the infrared thermometer to ensure that the laser focusing head, the infrared thermometer focusing head and the molten pool maintain a constant focal length;

[0026] 3. Make the swing platform drive the thermometer to do a dynamic plane scan in the molten pool area, re-calibrate the center of the molten pool, make the focus and sampling point of the thermometer follow the offset of the molten pool center, and ensure the authenticity of temperature measurement.

[0027] The special instrument of the laser processing detection method of the present inve...

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Abstract

The invention relates to a laser processing detection method comprising: a. non-contact distance meter pre-measures the variable data of to-be-processed surface flatness of workpiece; b. according to the variable data of to-be-processed surface flatness of workpiece, the platform is moved to adjust the positions of laser focus head and infrared temperature-measuring instrument dynamically, so as to ensure the laser focus head and infrared temperature-measuring instrument focus head keep constant focal length with molten pond; c. the platform is swung to drive the temperature-measuring instrument to perform dynamic planar scanning, the center of the molten pond is re-calibrated so that the focusing and sampling point of the temperature-measuring instrument deviates along with the center of the molten pond. The invention adopts special instruments comprising the non-contact distance meter, the laser focus head, the infrared temperature-measuring instrument, and a central processor. The method in the invention has the advantages of accurate temperature monitoring for to-be-processed area and accurate control for laser spot size of to-be-processed area, simple method and equipment, and high efficiency.

Description

technical field [0001] The invention relates to a method and device for laser processing and detection, in particular to a method and device for adjusting the focal length of a temperature measuring instrument and a laser focusing head during laser processing of complex contour surfaces. Background technique [0002] During laser processing, accurate detection of the temperature in the processing area and the focusing of the laser in the processing area are very important for laser processing. [0003] Accurately measuring the temperature of the molten pool during laser processing is crucial for detecting laser processing status and feedback to adjust processing parameters. Factors may cause defocus and eccentricity of the thermometer during detection, affecting the accuracy of temperature measurement. [0004] In laser processing, the focus of the beam in the processing area will affect the spot size of the processing area, the spot energy density distribution of the proce...

Claims

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Application Information

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IPC IPC(8): B23Q17/24B23Q17/20B23K26/04G01B11/24G01B11/27G01J5/00
Inventor 姚建华胡晓冬
Owner ZHEJIANG UNIV OF TECH
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