Dental Workpiece Support With Compensation Surface Axis Alignment
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Solution Overview
Problem
Inaccuracies in the manufacture of workpiece carriers and drive shafts lead to deviations in the axis position during rotary machining, causing imbalances and inaccuracies in material removal processes for dental workpieces.
Innovation Solution
A method involving a workpiece carrier composed of separable and connectable parts, where one part has a compensation area with a material overhang for forming a compensating surface, and another part has a seat surface for positive connection, allowing for precise alignment and correction of axis position through material removal and form-fitting assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple workpiece carrier design is used for rotary machining, then the device complexity is reduced, but manufacturing precision deteriorates due to axis position deviations
Solution Approach 1:
The workpiece carrier is divided into multiple separable parts (first workpiece carrier part and second workpiece carrier part) that can be assembled together. This segmentation allows for a compensation area to be created at the interface, where a compensating surface can be formed through material removal to correct axis position deviations without redesigning the entire carrier.
Solution Approach 2:
The invention changes the geometric parameters of the workpiece carrier by creating a compensating surface with specific geometry (cylindrical, conical, or planar) in the compensation area. This surface is formed by removing material to a predetermined depth, thereby adjusting the axial position parameter to eliminate offsets between the workpiece rotation axis and drive rotation axis.
2Manufacturing precision
If material removal is performed to correct axis position, then manufacturing precision is improved, but loss of substance increases
Solution Approach 1:
Material removal is performed locally only in the compensation area of one workpiece carrier part, rather than modifying the entire workpiece carrier. This localized approach minimizes the total amount of material removed while still achieving the necessary axis position correction. The compensation area is specifically designed to accommodate the required material removal for alignment.
3Manufacturing precision
If the workpiece carrier is made separable with compensation area, then manufacturing precision can be corrected, but device complexity increases
Solution Approach 1:
The workpiece carrier is divided into multiple separable parts (first workpiece carrier part and second workpiece carrier part) that can be assembled together. This segmentation allows for a compensation area to be created at the interface, where a compensating surface can be formed through material removal to correct axis position deviations without redesigning the entire carrier.
Solution Approach 2:
The invention changes the geometric parameters of the workpiece carrier by creating a compensating surface with specific geometry (cylindrical, conical, or planar) in the compensation area. This surface is formed by removing material to a predetermined depth, thereby adjusting the axial position parameter to eliminate offsets between the workpiece rotation axis and drive rotation axis.
Data Source
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AI summary
The invention relates to a workpiece support (1) for removing material of a dental workpiece (2) which is held by the workpiece support (1) and is rotated together with the workpiece support (1) about a drive rotational axis (3) when material is being removed. The workpiece support (1) has at least two workpiece support parts (4, 5, 6) which can be separated from each other and connected to each other. One of the workpiece support parts (4, 5) has at least one compensation region (7) with a material projection (8) for introducing a compensation surface (9) by removing material, and the other workpiece support part (6) has a seating surface (10) for connecting to the compensation surface (9) in a formfitting manner.