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Z-Increments Online Supervisory System Based on Machine Vision for Laser Solid Forming.

Junhua Wang1,2,3, Junfei Xu1, Yan Lu4

  • 1School of Mechanical and Electrical Engineering, Henan University of Science and Technology, Luoyang 471003, China.

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|August 26, 2023
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Summary
This summary is machine-generated.

A new machine vision system precisely monitors cladding height in laser solid forming. This closed-loop control system adjusts Z-increments in real-time, improving component precision and manufacturing stability.

Keywords:
Z-incrementsclosed-loop control systemmachine visionoff-focus amount

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Area of Science:

  • Additive Manufacturing
  • Materials Science
  • Optical Engineering

Background:

  • Improper Z-increment in laser solid forming leads to off-focus variations, compromising component precision and quality.
  • Fluctuations in off-focus amount negatively impact the overall manufacturing process stability and material utilization.

Purpose of the Study:

  • To propose a closed-loop control system for Z-increment regulation in laser solid forming using machine vision.
  • To enhance the precision and quality of fabricated components by maintaining a constant off-focus amount.
  • To improve manufacturing process stability and powder material utilization.

Main Methods:

  • Development of a paraxial monitoring system for real-time cladding height assessment.
  • Implementation of edge detection technology and inverse perspective transformation for precise height measurement.
  • Integration of a closed-loop control system to adjust Z-increments based on real-time cladding height feedback.

Main Results:

  • The proposed system achieved a maximum relative error of 1.664% in determining cladding layer height.
  • Real-time adjustment of Z-increments led to reduced standard deviations in individual cladding layer heights.
  • Enhanced stability in the manufacturing process and improved powder material utilization were observed.

Conclusions:

  • The machine vision-based closed-loop control system effectively regulates Z-increments in laser solid forming.
  • Accurate real-time monitoring of cladding height significantly improves component precision and manufacturing consistency.
  • This approach offers valuable guidance for process optimization and quality enhancement in additive manufacturing.