Hydraulic Tool Holder Throttle Control for Dynamic Rigidity
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Solution Overview
Problem
Hydraulically clampable tool holders and workpiece holders suffer from flexibility and reduced dynamic rigidity due to the flow of hydraulic medium without resistance, leading to decreased machining precision when tools or workpieces are loaded.
Innovation Solution
Incorporating a central throttle point with an adjustable flow cross section in the channel system, allowing for increased flow resistance and dynamic rigidity by using an adjustment element to change the flow cross section, thereby enhancing the tool holder's ability to maintain tool position and precision during machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hydraulic medium flows freely through the channel system, then the clamping portion is flexible and easy to adjust, but the dynamic rigidity decreases leading to reduced machining precision
Solution Approach 1:
The patent introduces a throttle point in the channel system that changes the flow characteristics of the hydraulic medium. By adjusting the flow cross-section at the throttle point, the system modifies the flow resistance parameter, creating a damping effect that reduces unwanted movements while preserving the ability to adjust clamping force. This parameter change resolves the contradiction between flexibility and machining precision.
2Loss of energy
If the hydraulic medium flows without resistance, then the system operates with low energy loss, but the dynamic rigidity and stability are reduced
Solution Approach 1:
The throttle point creates a continuous damping effect throughout the operation of the clamping portion. The hydraulic medium continuously flows through the restricted cross-section, generating ongoing viscous damping forces that stabilize the system during machining operations. This continuous action maintains dynamic rigidity without requiring intermittent adjustments or additional active control mechanisms.
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
The solution increases the dynamic rigidity and machining precision of hydraulically clampable tool holders and workpiece holders by forcing hydraulic medium through a narrower cross section, creating a damping effect that reduces deflection and improves the overall clamping performance.
Implementation Method 1
a hydraulic clamping member is arranged within said sleeve part of such a hydraulically clampable tool holder, said hydraulic clamping member decreasing its inside diameter, which engages around the tool shank, when hydraulic pressure is applied
Implementation Method 2
The solution increases the dynamic rigidity and machining precision of hydraulically clampable tool holders and workpiece holders by forcing hydraulic medium through a narrower cross section, creating a damping effect that reduces deflection
Data Source
AI summary
A device for hydraulically clamping tools or workpieces, a tool holder or workpiece holder for short, has a clamping portion for clamping a tool or workpiece. An interior of the clamping portion has a plurality of chambers which are connected in fluidic communication by way of a channel system. In order to be able to change, in particular increase, the dynamic rigidity of the hydraulically clampable tool/workpiece holder, a central throttle point is arranged in the channel system. The central throttle point has an adjustment element with which a flow cross section in the central throttle point can be changed.