Spectacle Lens Edging System Bevel Correction
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Solution Overview
Problem
The existing spectacle lens edging processes face challenges in achieving precise fitting due to variations in groove shapes and types of spectacle frame measuring machines and lens edgers, leading to deviations in beveling and alignment, which complicates the edging process and makes it difficult to manage and correct size failures.
Innovation Solution
A method and system that recognize the actual fitting mode between the groove shape of the spectacle frame and the bevel shape, correcting the beveling amount from data acquisition to instruction, to ensure precise fitting regardless of groove shape or edger type, using a comprehensive approach that includes measurement reference points and beveling instruction points to align the bevel shape with the frame shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional edging process is performed based on frame shape data without considering groove shape variations and machine type differences, then the edging process is simple, but the fitting precision of the spectacle lens into the frame deteriorates
Solution Approach 1:
The system performs preliminary recognition of the actual fitting mode between groove shape and bevel shape before the edging process. Frame shape data is acquired and analyzed in advance to determine the relationship between the groove geometry and the resulting bevel geometry, allowing the edging machine to pre-calculate the necessary beveling parameters to achieve precise fitting.
Solution Approach 2:
The system establishes a feedback loop where the actual fitting mode is recognized by comparing the groove shape data with the bevel shape data. This feedback information is then used to correct the beveling amount, ensuring that the spectacle lens fits precisely into the frame despite variations in groove shape and machine type differences.
2Manufacturing precision
If actual body alignment is performed to achieve precise fitting, then the fitting precision improves, but the work complexity and time consumption increase
Solution Approach 1:
The system replaces the manual mechanical alignment process with an automated digital system. The terminal computer automatically recognizes the actual fitting mode by processing frame shape data and bevel shape data, and calculates the corrected beveling parameters, eliminating the need for time-consuming manual actual body alignment while maintaining high fitting precision.
Solution Approach 2:
The system performs all necessary calculations and corrections in advance through automated processing of frame shape data and bevel shape data. The edging machine receives pre-calculated instructions that account for groove shape variations and machine type differences, eliminating the need for post-edging alignment adjustments.
3Reliability
If the edging process does not account for groove shape variations and machine type differences, then the process is straightforward, but the reliability of fitting accuracy deteriorates
Solution Approach 1:
The system is designed to be universal and adaptable to different groove shapes (V-shaped, U-shaped) and different types of spectacle frame measuring machines and lens edgers. By recognizing the actual fitting mode through automated data processing, the system can handle various combinations of machines and frame types without requiring machine-specific programming or manual adjustments, thereby improving fitting reliability across diverse configurations.
Solution Approach 2:
The system continuously monitors and recognizes the actual fitting mode by comparing frame shape data with bevel shape data. This feedback mechanism automatically adjusts the beveling parameters to compensate for groove shape variations and machine type differences, ensuring reliable fitting accuracy regardless of the specific combination of equipment and frame types used.
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3~4(b)
AI summary
A controller 240 that gives an instruction of edging a spectacle lens, to a lens edger based on frame shape data outputted from a spectacle frame measuring machine, includes: recognition parts 240a, 240b that recognize a positional relation between a groove shape of the spectacle frame whose frame shape data is measured, and a measurement reference point being a reference when measuring the frame shape data, and a positional relation between a beveling instruction reference point being a reference when a beveling instruction is given to the lens edger and a bevel shape obtained by the beveling; and a beveling amount correcting part 240d that corrects a beveling amount when giving an instruction of beveling to the lens edger based on each positional relation recognized by the recognition parts 240a, 240b, so that the bevel shape is fitted into the groove shape.