CNC Tool Holder Vacuum Grip for Flexible Workpiece Handling
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Solution Overview
Problem
CNC machines face challenges in efficiently and cost-effectively handling workpieces due to the need for additional machinery, robots, or space-consuming systems for placement and removal, which are not easily adaptable to different types of workpieces.
Innovation Solution
A tool holder with a vacuum grip that utilizes a Venturi-type vacuum generator, integrated with the CNC machine's compressed air supply, providing a flexible and reliable fixation method without requiring extra machinery, and allowing for interchangeable suction cups of varying sizes and properties to accommodate diverse workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional workpiece handling systems (robots, gravity-driven magazines) are used, then workpieces can be placed and removed, but the systems are costly, space-consuming, and not easily adaptable to different workpiece types
Solution Approach 1:
The vacuum grip is designed to be mounted in the tool holder of a CNC machine, allowing the machine to perform both machining operations and workpiece handling functions with a single device. The grip can accommodate different workpiece types by replacing the suction cup component, providing universal functionality without requiring separate handling systems for different workpiece categories
Solution Approach 2:
The system utilizes the CNC machine's existing compressed air supply to generate vacuum through a Venturi device, making the handling system self-sufficient without requiring external vacuum generators or additional utility systems. The machine's own resources are leveraged to enable workpiece handling
2Productivity
If traditional workpiece handling systems are used, then workpieces can be handled, but additional machinery and space are required
Solution Approach 1:
The vacuum grip combines workpiece holding and positioning functions within the existing tool holder space of the CNC machine. By integrating the suction cup mechanism into the tool holder cavity, the system eliminates the need for separate robots or gravity-driven magazines, thereby saving space while maintaining productivity
Solution Approach 2:
The suction cup and vacuum generation components are nested within the tool holder structure. The Venturi device is positioned inside the tool holder body, with channels integrated into the existing structure, maximizing space utilization without requiring additional external components
3Device complexity
If a Venturi-type vacuum generator is used with compressed air supply, then vacuum is created without additional systems, but the channel design must ensure sufficient vacuum pressure
Solution Approach 1:
The channel dimensions (cross-sectional areas of first and second channels) are specifically designed to control the vacuum pressure generated by the Venturi device. By adjusting the ratio and dimensions of the channels, sufficient vacuum pressure is achieved while maintaining system simplicity. The first channel has a smaller cross-sectional area than the second channel to ensure adequate vacuum generation
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 and reliable operation of CNC machines with minimal disruption to their routine, as the vacuum grip provides firm holding of workpieces without additional systems, offering adaptability and cost-effectiveness through the use of existing compressed air and interchangeable components.
Implementation Method 1
the vacuum generator is of the Venturi type, created by said first channel connecting the suction cup to the second channel
Implementation Method 2
The suction cup will together with the source of vacuum provide the fixation needed in order to maintain the work piece in a fixed relationship
Data Source
Figure 1
Figure 2
AI summary
Vacuum grip for CNC machines where said grip comprises a main body, a first end and a second end, where the first end is adapted to be mounted in a tool holder of a CNC machine, where the second end is provided with a resilient suction cup, and where a vacuum generator is connected to a first channel arranged inside the main body which is connected to the suction cup.