Laser DED manufacturing control system and method fusing temperature and image information

A technology of image information and manufacturing control, applied in thermometers, additive manufacturing, thermometers with physical/chemical changes, etc., can solve problems that cannot directly reflect the organization and performance of components

Active Publication Date: 2022-03-25
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems in the above-mentioned prior art that only based on the temperature information, it is necessary to rely on the finite element model or the numerical analysis model to establish the relationship wit

Method used

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  • Laser DED manufacturing control system and method fusing temperature and image information
  • Laser DED manufacturing control system and method fusing temperature and image information
  • Laser DED manufacturing control system and method fusing temperature and image information

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Embodiment 1

[0050] Such as figure 1 and figure 2 As shown, the present embodiment provides a laser DED manufacturing control system that fuses temperature and image information, including a laser DED manufacturing system 1. The laser DED manufacturing system 1 includes an industrial robot 11, a laser 12 and a laser head 15. The laser DED manufacturing control The system also includes a temperature sensing module 2, a visual sensing module 3, an embedded module 4 and a PID control module 5, the temperature sensing module 2 and the visual sensing module 3 are all fixed on the laser head 15, and are respectively used to generate a molten pool The temperature information and image information of the embedded module 4 are respectively connected to the industrial robot 11, the laser 12, the temperature sensing module 2, the visual sensing module 3 and the PID control module 5;

[0051] The embedded module 4 sets the PID parameters and thresholds of the PID control module 5 according to the im...

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Abstract

The invention relates to a laser DED manufacturing control system and method fusing temperature and image information, the system comprises an embedded module, a laser DED manufacturing system, a temperature sensing module, a visual sensing module and a PID control module, and the laser DED manufacturing system, the temperature sensing module, the visual sensing module and the PID control module are all connected with the embedded module. Compared with the prior art, a molten pool overflow threshold calculation algorithm based on the contour of the molten pool is used to obtain a dimensionless number to represent the overflow degree of the molten pool, and the dimensionless number is used as a parameter supervisor of the PID control module; an analog quantity signal of the temperature is used as a feedback value of the PID control module; a PID control algorithm with a parameter supervisor is used, the advantages of visual reflection of images on cladding layer forming and high-speed response of temperature on the physical phenomenon of a molten pool are combined, multivariable control of the temperature and image information of the molten pool on cladding layer forming quality is achieved, and a new technical approach is provided for real-time control of laser DED manufacturing forming.

Description

technical field [0001] The invention relates to the technical field of laser DED manufacturing quality control, in particular to a laser DED manufacturing control system and method for fusing temperature and image information. Background technique [0002] In the process of laser DED manufacturing, it is impossible to achieve true repeatability and determinism even if the process parameters are kept constant. This is due to the reaction between the laser and the powder during the laser DED process, accompanied by rapid temperature field changes and rapid solidification. In addition, it is affected by uncertain conditions such as the particle size distribution of the powder particles and the heat transfer conditions of the substrate. Only with advanced monitoring methods can the quality stability and consistency of laser DED manufacturing components be guaranteed. However, the existing methods mainly monitor the laser DED manufacturing process through temperature and image s...

Claims

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Application Information

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IPC IPC(8): B22F12/00B22F10/25B22F12/90B22F10/85B22F10/364B22F10/31B22F12/41B22F12/49B22F10/37B33Y10/00B33Y30/00B33Y50/02G01B11/24G01K11/32
CPCB22F12/00B22F10/25B22F12/90B22F10/85B22F10/364B22F10/31B22F12/41B22F12/49B22F10/37B33Y10/00B33Y30/00B33Y50/02G01B11/24G01K11/32Y02P10/25
Inventor 陈华斌李旭张显程余锦王学武
Owner SHANGHAI JIAO TONG UNIV
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