Elastic Polishing Head Structure for Precise Optical Surface Finishing
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Solution Overview
Problem
Existing polishing technologies for optical elements, such as aspherical lenses, face challenges in achieving high precision with a complex structure due to the larger inertia and complexity of the polishing block, requiring intricate adjustments.
Innovation Solution
A polishing tool with a main shaft part and elastic parts extending radially, where the elastic parts and seat parts are displaced by a tool driving mechanism to elastically deform and displace the main shaft part axially or radially, controlled by a tool control device with frequency signal generators and superimposed signals to achieve precise polishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a polishing block with X-directional and Y-directional actuators is hung more on the front end side to achieve polishing function, then the polishing capability is improved, but the polishing block becomes larger, increasing inertia and complicating the structure
Solution Approach 1:
The polishing tool is divided into a main shaft part and separate elastic parts. The elastic parts extend radially outward from the main shaft part, with seat parts positioned at different locations. This segmentation allows the polishing function to be distributed across multiple components rather than concentrated in a single large block, reducing overall inertia while maintaining polishing capability.
Solution Approach 2:
The invention transitions from a conventional three-dimensional block structure to a more distributed architecture where elastic parts extend radially outward from the main shaft. This dimensional reorganization allows the polishing function to be achieved with smaller individual components arranged in a radial pattern, reducing inertia and simplifying the overall structure.
2Ease of operation
If the polishing block is made larger to include all actuators, then the polishing function is improved, but the inertia increases making control difficult
Solution Approach 1:
The polishing tool is divided into a main shaft part and separate elastic parts. The elastic parts extend radially outward from the main shaft part, with seat parts positioned at different locations. This segmentation allows the polishing function to be distributed across multiple components rather than concentrated in a single large block, reducing overall inertia while maintaining polishing capability.
Solution Approach 2:
The invention changes the spatial distribution parameter of the polishing components. Instead of concentrating all actuators in a large block, the elastic parts are distributed radially outward from the main shaft, with seat parts at different positions. This parameter change in spatial distribution reduces the moment of inertia while preserving the polishing function.
3Device complexity
If the polishing block structure is simplified, then the inertia is reduced, but the control precision may be compromised
Solution Approach 1:
The invention replaces the conventional mechanical block structure with a system based on elastic parts that can deform. The elastic parts connect the seat parts to the main shaft part, allowing precise control of the polishing surface position through elastic deformation rather than rigid mechanical linkages. This substitution enables simplified structure while maintaining control precision.
Solution Approach 2:
The invention changes the mechanical property parameter from rigid to elastic. The elastic parts can deform under applied forces, allowing the system to adapt to different polishing conditions while maintaining precise control. This parameter change enables structure simplification without compromising control precision.
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 enables high-precision polishing with a simplified structure, ensuring accurate surface finishing of workpieces like lenses and optical elements.
Implementation Method 1
the plurality of elastic parts elastically deform and the main shaft part is displaced so as to include an axial component with respect to the polishing axis
Implementation Method 2
an X-directional actuator and a Y-directional actuator formed of electrostrictive (piezoelectric) elements are used to induce slight motions in the direction of an XY plane perpendicular to the Z axis
Data Source
AI summary
A polishing tool for polishing a workpiece by holding a polishing material between the workpiece and its polishing surface, the polishing tool including: a main shaft part that has the polishing surface at a front end and that extends along a polishing axis; a plurality of elastic parts that are continuous from the main shaft part and that extend radially outward; and a plurality of seat parts that are continuous to the radially outside of the plurality of elastic parts. A position at which the main shaft part connects to each of the elastic parts and a position at which the corresponding seat part connects thereto are different in a direction of the polishing axis.