Dual-Mode Spindle Coupling for Precise Tool Presetting
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Solution Overview
Problem
Existing tool presetting and tool measuring apparatus devices lack flexibility in operation, as they are either limited to high precision or high torque, making them unsuitable for both precise measuring and secure tool clamping processes without manual intervention or tool holder displacement.
Innovation Solution
A spindle unit with a mechanical coupling mechanism that allows switching between two drive modes: a high-precision mode for precise positioning and a high-torque mode for secure clamping, enabling automated tool clamping and release without displacing the tool holder, using a separate drive unit for increased torque and a form-fit coupling system for easy switching between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spindle unit is designed for high precision positioning, then measurement accuracy is improved, but available torque is reduced making it unsuitable for secure tool clamping
Solution Approach 1:
The spindle unit employs a dynamic coupling mechanism that allows switching between two operational modes: a first mode for high-precision positioning with reduced torque, and a second mode for high-torque clamping operations. The coupling unit dynamically reconfigures the drive system to adapt torque characteristics to the specific operational requirement, resolving the contradiction between precision and torque availability.
Solution Approach 2:
The system changes operational parameters by switching between different drive modes. In the first mode, the spindle operates with precision-optimized parameters for measurement tasks. In the second mode, parameters are changed to provide high torque for clamping, achieved through the coupling unit that connects alternative drive mechanisms or reconfigures the existing drive system.
2Force
If a separate high-torque drive system is added for tool clamping, then clamping capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the high-torque clamping function with the existing precision spindle unit by integrating a coupling unit that allows the same spindle to operate in both precision mode and high-torque mode. This consolidation avoids the need for completely separate drive systems, reducing overall device complexity while maintaining both functionality sets.
Solution Approach 2:
The spindle unit is designed with multi-functionality, serving both as a precision positioning mechanism for measurement and as a high-torque drive for tool clamping. The coupling unit enables this universal application by reconfiguring the drive system based on operational requirements, eliminating the need for dedicated separate systems.
3Productivity
If automated tool clamping is implemented, then operational speed is improved, but safety risks increase due to high torque during manual positioning
Solution Approach 1:
The coupling unit dynamically adapts the torque characteristics based on the operational phase. During automated clamping operations, high torque is engaged to achieve rapid and secure tool fixation. During manual positioning and measurement phases, the system switches to a low-torque mode that ensures operator safety while maintaining positioning precision, thus resolving the safety-productivity contradiction.
Solution Approach 2:
The system employs periodic switching between different operational modes: high-torque automated clamping phases alternate with low-torque manual positioning phases. This periodic action ensures that high torque is applied only when necessary for productivity, while safety is maintained during manual intervention periods through torque reduction via the coupling mechanism.
Data Source
AI summary
A tool presetting and/or tool measuring apparatus device includes a carrier unit and a spindle unit, in particular motor spindle unit, which is supported by the carrier unit, which is at least configured for a rotation of an object inserted in the spindle unit, in particular a tool and/or a tool holder, around a spindle axis of the spindle unit and which comprises at least one drive unit for generating the rotation movement of the object, wherein the spindle unit includes a coupling unit which is configured, in particular for the purpose of changing a maximally achievable spindle torque, to drive the spindle unit in at least two differing modes.