Venturi Tool Holder Dust Extraction for Composite Machining
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Solution Overview
Problem
Existing machining processes face challenges in efficiently removing composite dust particles, which are abrasive, conductive, and pose health and safety risks, requiring bespoke equipment and significant floor space, and are not suitable for existing standard machinery.
Innovation Solution
A device incorporating a Venturi mechanism connected to a machining machine, facilitating the suction of dust through a nozzle and central portion, allowing for the extraction of machining dust without altering the workpiece characteristics or requiring extensive space, and adaptable for existing equipment using 3D printable materials for customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a dust extractor incorporating a fan or impeller is used, then machining dust can be removed, but a lot of floor space is required and large fragments can damage the device
Solution Approach 1:
The extraction mechanism is nested within the tool holder assembly itself, with the Venturi junction integrated into the tool holder body. This allows the extraction system to occupy minimal space while maintaining effective dust removal capability.
Solution Approach 2:
The invention uses a Venturi mechanism that employs fluid dynamics (pneumatics) to create suction through a restricted passage. The Venturi junction uses the pressure differential created by fluid flow to extract dust without requiring mechanical fans or impellers, eliminating the need for large floor space.
2Object-generated harmful factors
If a dust extractor incorporating a fan or impeller is used, then machining dust can be removed, but large fragments can damage the device
Solution Approach 1:
The Venturi mechanism uses fluid flow and pressure differentials to create suction, eliminating mechanical moving parts such as fans or impellers that could be damaged by large fragments. The system relies on the Venturi effect where the fluid flow itself generates the extraction force, making it inherently more durable.
Solution Approach 2:
The system uses the existing fluid flow from the machining process to generate its own extraction force through the Venturi effect, rather than requiring separate mechanical components. The fluid flow self-regulates the suction mechanism, reducing vulnerability to damage from material fragments.
3Object-generated harmful factors
If bespoke machining platforms with integral extraction are purchased, then composite machining can be performed safely, but the cost is very high
Solution Approach 1:
The tool holder assembly performs multiple functions: it holds the cutting tool, provides structural support, and incorporates the Venturi extraction mechanism. This multi-functionality eliminates the need for separate bespoke extraction systems, significantly reducing costs while maintaining effective dust extraction for composite materials.
Solution Approach 2:
The invention merges the tool holder and extraction mechanism into a single integrated assembly. The Venturi junction is combined with the tool holder body, creating a unified component that reduces manufacturing complexity and cost compared to separate bespoke systems.
4Object-generated harmful factors
If cooling fluid is used to remove material waste, then dust can be removed, but the cooling fluid would alter the characteristics of the work piece
Solution Approach 1:
The system uses pneumatic extraction through the Venturi mechanism rather than liquid cooling fluids. Compressed air or gas flows through the Venturi junction to create suction, removing dust particles without introducing any liquid that could alter the work piece characteristics.
Solution Approach 2:
The Venturi junction acts as an intermediary mechanism that transfers momentum from the fluid flow to the dust particles, enabling removal without direct contact between the work piece and extraction medium. This indirect extraction method preserves work piece integrity.
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 efficient and safe removal of composite machining dust, adapting existing machinery for composite materials, reducing manufacturing costs and space requirements, and allowing for the extraction of large fragments without damage, while maintaining tool efficiency and safety.
Implementation Method 1
a Venturi mechanism connected to the body and in fluid communication with said second opening; wherein said Venturi mechanism is configured to facilitate the suction of machining dust through the second opening between said body and a cutting tool, and through the Venturi mechanism
Data Source
AI summary
The present invention provides a device (10) for the extraction of machining dust. The device (10) comprises a body (12) configured to be coupled to a section of a machining machine. The body (12) having a first opening (11) at a first end thereof and a second opening (13) at a second end thereof. The first end is opposite the second end, and the first opening (11) is configured to receive a tool holder therethrough and the second opening (13) configured to receive a cutting tool therethrough. The device also comprises a Venturi mechanism (14) connected to the body (12) and in fluid communication with said second opening (13). The Venturi mechanism (14) is configured to facilitate the suction of machining dust through the second opening (13) and through the Venturi mechanism (14).