Eyeglass Lens Processing Apparatus Chip Removal Control
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Solution Overview
Problem
During the processing of eyeglass lenses, particularly those made from thermoplastic materials, chips often adhere to the lens surface after roughing, leading to measurement inaccuracies and reduced processing precision due to increased viscosity when heated, which hinders accurate lens shape measurement and finishing.
Innovation Solution
An eyeglass lens processing apparatus equipped with a processing tool, movement portion, positional data acquiring portion, and processing control portion that acquires and utilizes positional data to control the movement of the processing tool for removing adhering chips, ensuring accurate lens shape measurement and finishing by using inclined surface grindstones for efficient chip removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a thermoplastic lens is subjected to roughing, then the lens periphery is processed to fit the eyeglass frame shape, but chips adhere to the lens due to increased viscosity when heat is applied
Solution Approach 1:
The patent applies preliminary cooling action by blowing cooled air or spraying coolant onto the lens surface before and during roughing processing. This prevents chips from adhering to the lens by maintaining lower temperature and reducing viscosity of the thermoplastic material, thereby eliminating the need for subsequent chip removal operations.
2Productivity
If chips adhere to the lens after roughing, then lens measurement accuracy deteriorates, but measurement is necessary for finishing
Solution Approach 1:
The system performs preliminary chip removal by blowing cooled air or spraying coolant to remove chips from the lens surface before measurement. This ensures that subsequent lens shape measurement is not hindered by chip adhesion, maintaining both measurement accuracy and processing precision.
Solution Approach 2:
The patent incorporates a feedback mechanism where the lens shape measurement result is used to determine the finishing processing amount. The system continuously monitors the lens shape and adjusts finishing operations accordingly, ensuring high processing accuracy while maintaining productivity.
3Manufacturing precision
If chips, processing tool, and lens come into contact during finishing, then processing accuracy deteriorates, but finishing is necessary for final lens quality
Solution Approach 1:
The patent applies preliminary chip removal measures by cooling the lens surface and blowing away chips before finishing operations. This prevents chips from interfering with the finishing process, ensuring high finishing quality without contact interference between chips, processing tool, and lens.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively removes adhering chips, enabling accurate lens shape measurement and precise finishing, thereby improving the processing accuracy of various lens types, including thermoplastic lenses, by utilizing the apparatus's control system to manage chip removal based on acquired positional data.
Implementation Method 1
a processing tool configured to process a periphery of a lens
Implementation Method 2
control the movement portion based on the corner portion processing control data so as to remove the chip adhering to the lens
Data Source
AI summary
An eyeglass lens processing apparatus includes: a processing tool configured to process a periphery of a lens; a movement portion configured to change a relative position between the lens and the processing tool; a positional data acquiring portion configured to acquire positional data related to a corner portion of an edge of the lens before the lens is finished and after the lens is roughed; a processing control data acquiring portion configured to acquire corner portion processing control data for removing a chip adhering to the lens through roughing, based on the positional data acquired by the positional data acquiring portion; and a processing control portion configured to control the movement portion based on the corner portion processing control data so as to remove the chip adhering to the lens.