An Inspection Technique Using Fit Clearance Based on Microscopic Vision in Precision Assembly.

Area of Science:

• Optics and Mechanical Engineering
• Manufacturing and Quality Control

Background:

• Precision assembly of optic-mechanical devices requires accurate inspection of micro multi-section arcs.
• Machining errors cause complex deformations, challenging inspection and Region of Interest (ROI) extraction.
• Microscopic vision inconsistencies further complicate feature identification.

Purpose of the Study:

• To develop an effective Region of Interest (ROI) extraction method for micro multi-section arcs.
• To propose a novel inspection method for micro multi-section arcs based on assembly fit requirements.
• To improve the accuracy of inspection in precision assembly processes.

Main Methods:

• A CAD model-based method for rough positioning of feature points and connected region detection for ROI refinement.
• Utilizing the CAD model again, based on feature points, to determine the final ROI.
• Implementing an inspection method tailored for micro multi-section arcs, considering assembly fit.

Main Results:

• The proposed method successfully extracts the Region of Interest (ROI) for micro multi-section arcs.
• Experimental validation on eight-section arcs and mirrors demonstrates the method's effectiveness.
• The technique shows potential for improving inspection accuracy in precision assembly.

Conclusions:

• The developed method offers a robust solution for inspecting micro multi-section arcs.
• This approach addresses challenges posed by machining errors and image inconsistencies.
• The findings contribute to enhanced quality control in optic-mechanical device manufacturing.