Finishing Device Pivot Support Mass Reduction
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Solution Overview
Problem
Existing finishing devices face challenges in achieving high precision and efficient material removal during the finishing machining of workpieces, particularly curved surfaces, due to limitations in pivot support mass and force transmission efficiency.
Innovation Solution
The finishing device incorporates a force-generating apparatus mounted externally to the pivot support, with a force-transmitting apparatus, such as a cable element, to reduce the mass of the pivot support and enhance its pivoting frequency, allowing for increased material removal rates and reduced counteractive centrifugal forces, while maintaining precise control through a compact and torsion-minimized design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the force-generating apparatus is integrated into the pivot support, then the structure is compact, but the pivot support mass increases reducing pivoting frequency
Solution Approach 1:
The device is divided into separate functional modules: the force-generating apparatus is mounted on a mounting apparatus distinct from the pivot support, which is guided by a separate guiding apparatus. This segmentation reduces the pivot support mass, enabling higher pivoting frequencies while maintaining structural functionality.
Solution Approach 2:
A force-transmitting apparatus acts as an intermediary between the force-generating apparatus and the finishing-tool holder. This mediator transmits the pressing force without requiring direct integration of the force-generating apparatus into the pivot support, thus reducing mass while maintaining force transmission capability.
2Productivity
If the pivot support mass is reduced to increase pivoting frequency, then material removal rate increases, but force transmission stability may deteriorate
Solution Approach 1:
The force-transmitting apparatus serves as a stable intermediary that reliably transmits pressing force from the force-generating apparatus to the finishing-tool holder. This dedicated force transmission path maintains stability even when the pivot support mass is reduced for higher pivoting frequencies.
Solution Approach 2:
The pressing force is generated and transmitted through the force-transmitting apparatus before the pivoting action occurs. This preliminary force application ensures stable force transmission throughout the pivoting cycle, maintaining reliability during high-frequency operation.
3Device complexity
If a cable element is used for force transmission, then the design is compact and torsion is minimized, but force transmission path length increases
Solution Approach 1:
A cable element is used as the force-transmitting apparatus, leveraging its flexible yet torsion-resistant properties. The cable element can accommodate the spatial arrangement between the force-generating apparatus and finishing-tool holder while minimizing torsional effects, achieving a compact design without excessive path length.
Data Source
AI summary
A finishing device includes a finishing tool having a grinding face and a finishing-tool holder configured to hold the finishing tool. The finishing-tool holder is movably guided on a pivot support which is pivotable about a pivot axis. A force-generating apparatus is configured to generate a pressing force, by means of which the grinding face of the finishing tool is pressed against a workpiece to be machined. The force-generating apparatus is arranged on a mounting apparatus for pivotally mounting the pivot support. A force-transmitting apparatus is configured to transmit the pressing force from the force-generating apparatus to the finishing-tool holder.