Optical Lens 3D Machining Tool Movement Dynamics

Solution Overview

Problem

Current 3D machining devices for optical lenses, particularly those with asymmetrical surfaces, require high-frequency reversal movements of machining tools along both parallel and perpendicular axes, leading to inefficiency and high costs.

Innovation Solution

A method to determine movement data for machining tools in 3D machining devices, involving stages to provide tool and surface data, machining rules, and determining 3D surfaces to optimize tool movement, allowing for frequencies of reversal along parallel axes to be equal to or less than rotation frequencies, thereby reducing tool stress and improving surface quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If high-frequency reversal movements of machining tools along parallel and perpendicular axes are used, then asymmetrical surfaces can be machined, but tool stress increases and efficiency decreases

Engineering Contradiction:

Improveability to machine asymmetrical surfacesVSAvoidmachining efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent applies dynamics by making the machining tool movement adaptive and variable. The tool movement is dynamically adjusted based on the rotation frequency of the optical lens, allowing the reversal frequency to be equal to or less than the rotation frequency rather than requiring high-frequency reversals. This dynamic adjustment resolves the contradiction by maintaining the ability to machine asymmetrical surfaces while improving machining efficiency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of tool movement frequency. Instead of using high-frequency reversal movements along both parallel and perpendicular axes, the invention modifies the movement parameters to allow reversal frequency to be equal to or less than the rotation frequency. This parameter change enables efficient machining of asymmetrical surfaces without excessive tool stress, resolving the productivity-adaptability contradiction.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If high-frequency reversal movements of machining tools are used, then asymmetrical surfaces can be machined, but tool stress increases

Engineering Contradiction:

Improveability to machine asymmetrical surfacesVSAvoidtool stress

Core Design Contradiction:

Adaptability or versatilityVSStress or pressure

Solution Approach 1:

The patent applies dynamics by making the machining tool movement adaptive and variable. The tool movement is dynamically adjusted based on the rotation frequency of the optical lens, allowing the reversal frequency to be equal to or less than the rotation frequency rather than requiring high-frequency reversals. This dynamic adjustment resolves the contradiction by maintaining the ability to machine asymmetrical surfaces while improving machining efficiency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of tool movement frequency. Instead of using high-frequency reversal movements along both parallel and perpendicular axes, the invention modifies the movement parameters to allow reversal frequency to be equal to or less than the rotation frequency. This parameter change enables efficient machining of asymmetrical surfaces without excessive tool stress, resolving the productivity-adaptability contradiction.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If standard turning processes are used, then symmetrical faces can be machined, but asymmetrical surfaces cannot be produced

Engineering Contradiction:

Improvesimplicity of machining processVSAvoidability to produce asymmetrical surfaces

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by making the machining tool movement adaptive and variable. The tool movement is dynamically adjusted based on the rotation frequency of the optical lens, allowing the reversal frequency to be equal to or less than the rotation frequency rather than requiring high-frequency reversals. This dynamic adjustment resolves the contradiction by maintaining the ability to machine asymmetrical surfaces while improving machining efficiency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments the machining process into controlled stages with specific movement patterns. By dividing the tool movement into manageable segments with defined reversal frequencies relative to rotation frequency, the process can handle both symmetrical and asymmetrical surfaces. This segmentation allows the simple turning process to be extended to asymmetrical surfaces without excessive complexity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8965557B2Method for machining a surface of an optical lens

Publication Date: 2015.02.24 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

AI summary

Method for determining movement data representing the movement of a machining tool of an optical lens 3D machining device for machining a surface of an optical lens, wherein the method comprises: a machining tool data providing stage, a surface data providing stage, a machining rule providing stage, a 3D surface determining stage in which the 3D surface corresponding to the surface consisting of all the positions of the reference point of the machining tool that allow the profile of the cutting edge of the machining tool to tangent the derivable surface of the optical lens is determined, a movement data determining stage.