Hydraulic Facing Head Coupling for Automated Tool Clamping
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Solution Overview
Problem
Existing facing heads for machine tools lack a simple and automated method for tool exchange, requiring manual intervention and complex mechanical adjustments to change tools during operation.
Innovation Solution
A facing head with a hydraulically controllable tool holder device and a moveable facing slide that can be adjusted between tool change and working positions, using hydraulic couplings to switch between hold and release conditions, allowing for automatic tool exchange and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a hydraulically controllable tool holder device with moveable facing slide is used, then automated tool exchange is enabled, but hydraulic pressure changes during movement can compromise tool holding reliability
Solution Approach 1:
The hydraulic system is segmented into two independent circuits: a first hydraulic circuit for tool holder device control and a second hydraulic circuit for facing slide positioning. This segmentation prevents pressure changes in one circuit from affecting the other, ensuring tool holding reliability while enabling automated movement.
Solution Approach 2:
A check valve is introduced as an intermediary element between the hydraulic circuits and the tool holder device. The check valve maintains constant hydraulic pressure in the tool holder device by preventing backflow, thereby ensuring reliable tool holding during automated operations.
2Adaptability or versatility
If the facing slide is moveably supported to enable tool position adjustment, then tool exchange capability is improved, but complex mechanical adjustment mechanisms are required
Solution Approach 1:
The mechanical adjustment mechanism for the facing slide is replaced with a hydraulic positioning system. The second hydraulic circuit actuates the facing slide to move between tool change position and working position, eliminating complex mechanical linkages and reducing overall device complexity while maintaining full adjustability.
Solution Approach 2:
The hydraulic system serves multiple functions: the first hydraulic circuit controls tool holder device operations (clamping/releasing), while the second hydraulic circuit positions the facing slide. This multi-functionality consolidates what would otherwise require separate mechanical systems into a single integrated hydraulic platform.
3Extent of automation
If hydraulic pressure is changed to switch between hold and release conditions, then automated tool release is achieved, but pressure changes can affect tool holding stability
Solution Approach 1:
The hydraulic control system is divided into separate circuits: the first hydraulic circuit manages tool holder device pressure for clamping/releasing operations, while the second hydraulic circuit handles facing slide positioning. This segmentation isolates pressure changes to specific functions, preventing destabilizing pressure fluctuations from affecting tool holding stability.
Solution Approach 2:
A check valve acts as an intermediary that decouples the hydraulic circuits. When the facing slide moves or the tool holder device releases the tool, the check valve prevents pressure changes from propagating to the tool holding mechanism, thereby maintaining tool holding stability during automated release operations.
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 simple and automated tool exchange, maintaining hydraulic pressure consistency and preventing pressure changes during operation, ensuring reliable tool holding and release without the need for manual intervention or complex mechanical adjustments.
Implementation Method 1
hydraulically controllable tool holder device... by means of which a hydraulic pressure in at least one working chamber of the tool holder device can be changed
Data Source
AI summary
A facing head as well as a method for inserting a tool into and/or removing a tool from a tool holder device of the facing head. The facing head has a spindle coupling device for exchangeably coupling with a spindle chuck of a working spindle of a machine tool. The facing head has a housing body at which or in which a facing slide is moveably supported in a guided manner. The facing slide supports the tool holder device. The tool holder device is hydraulically controllable. A hydraulic coupling that is mechanically and hydraulically coupled with an associated hydraulic control coupling of the housing body in a tool change position of the facing slide. Remote from the tool change position, the mechanical and hydraulic connection between the hydraulic coupling and the associated hydraulic control coupling is interrupted. In the tool change position a switching of the tool holder device between a hold condition holding the tool and a release condition releasing the tool can be carried out by a respective pressurization with hydraulic pressure.