Monolithic Mineral Base for Full-Surface Workpiece Support
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Solution Overview
Problem
Current support structures for large-format workpieces with high aspect ratios, such as mirror substrates, fail to provide full-surface support, leading to dimensional instability and potential damage during processing and transport due to external forces like gravity, and existing glass-ceramic bases are costly and complex to produce.
Innovation Solution
A monolithic base with a mineral-based surface designed for full-surface support, featuring a non-stick coating and mechanisms for lifting and displacing workpieces pneumatically or hydraulically, preventing adhesion and allowing for structured surface production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steel support structures are used to support thin mirror girdles, then the workpiece can be supported during processing and transport, but full-surface support is not provided leading to dimensional instability and deformation under gravity
Solution Approach 1:
The support structure is divided into a monolithic base providing full-surface support and separate lifting devices positioned at specific locations. This segmentation allows the base to provide continuous support for dimensional stability while the lifting devices handle transport operations without requiring complex full-surface lifting mechanisms.
Solution Approach 2:
A non-stick coating is applied to the contact surface of the monolithic base as an intermediary layer between the workpiece and the support structure. This coating prevents adhesion and friction, enabling easy detachment and lateral displacement of the workpiece without compromising the full-surface support provided by the base.
2Reliability
If glass-ceramic bases are used to support workpieces, then full-surface support and dimensional stability are achieved, but the manufacturing process is complex and expensive
Solution Approach 1:
The monolithic base is made from concrete or similar inexpensive mineral-based materials instead of expensive glass-ceramic. While the base may require replacement after heavy use, its low cost makes this economically acceptable, especially compared to the expensive workpieces being supported. This principle trades the longevity of expensive materials for the affordability of replaceable support structures.
Solution Approach 2:
The support system combines a monolithic mineral-based base (concrete or similar material) with a non-stick coating layer. This composite structure provides the structural stability and full-surface support needed while the coating layer adds the necessary non-adhesive properties, achieving the functional requirements at lower cost than pure glass-ceramic solutions.
3Ease of operation
If the support surface is designed to prevent workpiece adhesion, then easy detachment and lateral displacement are enabled, but the workpiece may not remain stable during processing
Solution Approach 1:
The non-stick coating is applied selectively to specific contact surfaces of the monolithic base where the workpiece makes contact, rather than the entire base surface. This localized application provides anti-adhesion properties exactly where needed for easy detachment while maintaining sufficient friction and stability in other areas during processing operations.
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
Ensures dimensional stability and prevents surface damage during processing and transport by providing uniform support and easy detachment of workpieces, while being cost-effective and allowing for complex surface structures.
Implementation Method 1
the surface of the support, specifically the contact surface for the workpiece, is designed in such a way as to prevent the workpiece from adhering to it
Implementation Method 2
devices with which the workpiece can be detached from the support and/or laterally displaced by lifting it from below, in particular by applying overpressure
Data Source
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AI summary
The invention relates to a composite comprising a mineral-based monolithic base for full-surface support of a workpiece during machining and transport, and a workpiece resting on it, wherein the surface of the base is designed in such a way as to prevent the workpiece from adhering to it, and wherein the base has devices in which means by which the workpiece can be lifted from below and/or laterally displaced are embedded, and a suitable mineral-based monolithic base for this purpose.