Modular Fluid-Actuated Chuck for Multi-Surface Workpiece Machining
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Solution Overview
Problem
Existing devices fail to precisely clamp and machine ring-shaped or disc-shaped workpieces on multiple surfaces without re-clamping, leading to accuracy issues and inefficiencies in machining processes.
Innovation Solution
A device comprising an upper and lower receiving part, actuated by pressurized fluid, with radially acting elements and transmission elements for precise alignment and clamping, allowing for detachable and modular adaptation to different workpieces, enabling machining of multiple surfaces with high precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a workpiece is clamped on a machine tool for machining, then machining precision can be achieved, but re-clamping is required when machining different surfaces which reduces productivity
Solution Approach 1:
The receiving device is divided into an upper receiving part and a lower receiving part that can be detachably connected. The upper receiving part can be exchanged depending on which surfaces need to be machined, allowing multiple surfaces to be accessed without re-clamping the workpiece, thus improving productivity while maintaining machining precision.
Solution Approach 2:
The device employs actuators with pressurized fluid to dynamically adjust the position and orientation of the upper receiving part relative to the lower receiving part. This dynamic adjustability enables precise positioning for machining different surfaces while maintaining stable clamping, resolving the contradiction between precision and productivity.
2Adaptability or versatility
If different workpieces with different dimensions are machined, then versatility is improved, but maintaining high precision across different workpieces becomes difficult
Solution Approach 1:
The lower receiving part serves as a universal base that can accommodate multiple upper receiving parts with different dimensions and configurations. Each upper receiving part is designed for specific workpiece types, allowing the system to handle diverse workpieces while maintaining precision through the standardized interface and precise positioning mechanisms between upper and lower parts.
Solution Approach 2:
The device uses actuators driven by pressurized fluid to replace traditional mechanical positioning and clamping systems. This substitution enables precise and repeatable positioning of the upper receiving part relative to the lower receiving part, ensuring high machining precision across different workpiece types while maintaining versatility.
3Measurement precision
If actuators with pressurized fluid are used for precise alignment, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The device employs actuators driven by pressurized fluid (hydraulic or pneumatic system) to achieve precise alignment and positioning of the upper receiving part relative to the lower receiving part. The pressurized fluid provides controlled, repeatable motion with high precision while keeping the actuator structure relatively simple compared to equivalent mechanical positioning systems.
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
Enables precise machining of multiple surfaces on ring-shaped or disc-shaped workpieces with high precision and economic efficiency, reducing re-clamping needs and improving productivity.
Implementation Method 1
the actuating elements being actuated by displacement of a pressure fluid, in particular hydraulic oil
Implementation Method 2
the transmission elements, when the upper receiving part and the lower receiving part are connected, lie against one another on a surface which corresponds to the parting plane between the upper receiving part and the lower receiving part
Data Source
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AI summary
The invention relates to a device (1) for holding a workpiece (2) on a machine tool (3), with which particularly precise machining of the workpiece on multiple surfaces can be carried out. It comprises a receiving upper part (4) and a receiving lower part (5), wherein the receiving upper part (4) and the receiving lower part (5) are detachably connected to each other coaxially about a central axis (a), wherein the receiving upper part (4) has a number of actuating elements (6) with which a radially acting force (r) and/or a radial displacement can be exerted on the workpiece (2), wherein the actuating elements (6) are actuated by displacement of a pressurized fluid, wherein a number of actuators (7) corresponding to the number of actuating elements (6) are arranged in the receiving lower part (5), with which a defined volume of pressurized fluid can each be conveyed to a transfer element (8).wherein a number of transfer elements (8) corresponding to the number of actuating elements (6) is provided, wherein each transfer element (8) has a section (9) arranged in the receiving upper part (4) and a section (10) arranged in the receiving lower part (5), wherein each section (9, 10) has a receiving chamber (11, 12) for pressurized fluid, which is bounded by a transmission element (13, 14) by which a movement of one of the transmission elements (14) resulting from the displacement of pressurized fluid can be transmitted to the other transmission element (13).