Rotating Blade Suction Wheel for CFRP Chip Extraction
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Solution Overview
Problem
Existing extraction devices for machining CFRP materials suffer from insufficient suction power, complex assembly, and high manufacturing costs, making them unsuitable for high-performance machining.
Innovation Solution
A suction device with a unique blade arrangement and geometry, manufactured additively, forming a paddle wheel with progressively increasing radial distance between blade leading edges, allowing for high suction performance and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional extraction devices with suction pumps and bell-shaped bodies are used, then chip removal function is provided, but suction power is insufficient for high-performance CFRP machining
Solution Approach 1:
The extraction device is designed to rotate together with the cutting tool at high speeds (up to 24,000 rpm), transforming a static suction system into a dynamic one. The rotation of the blade wheel creates centrifugal forces and dynamic pressure gradients that significantly enhance suction power compared to conventional stationary suction pumps, enabling effective removal of fine CFRP chips during high-performance machining.
Solution Approach 2:
The invention utilizes pneumatic principles by creating a blade wheel that generates airflow through its rotation. The blades are specifically designed to create pressure differentials and air currents that draw chips toward the extraction openings, replacing traditional mechanical suction pumps with a pneumatic field-based extraction mechanism that delivers superior suction power.
2Reliability
If complex extraction devices with multiple components are used, then extraction function is achieved, but assembly becomes complex and error-prone
Solution Approach 1:
The extraction device is integrated directly into the tool holder as a unified component, merging the extraction function with the tool holding function. The blade wheel is formed as an integral part of the tool holder body, eliminating separate assembly steps and reducing the number of components. This integration maintains reliable extraction functionality while dramatically simplifying assembly procedures and reducing error potential.
Solution Approach 2:
The tool holder is designed with multi-functionality, serving both as a tool clamping device and as a rotating extraction system. The blade wheel structure performs dual functions: it maintains the structural integrity of the tool holder while simultaneously generating the airflow necessary for chip extraction. This universal design reduces overall system complexity by combining multiple functions into a single component.
3Ease of manufacture
If traditional manufacturing methods are used for extraction devices, then conventional components can be produced, but manufacturing costs are high and production time is long
Solution Approach 1:
The invention employs additive manufacturing (3D printing) to produce the tool holder and blade wheel integration, fundamentally changing the manufacturing parameter from traditional subtractive or formative methods. This parameter change enables complex geometries to be manufactured directly from digital models, reducing production time and cost while maintaining manufacturing simplicity. The additive process allows the integrated design to be produced as a single piece without complex assembly or tooling requirements.
4Productivity
If blade leading edges are positioned close to the tool, then suction efficiency is improved, but imbalance forces increase
Solution Approach 1:
The blade wheel features asymmetric blade geometry with specifically designed leading edges that are positioned optimally close to the tool for efficient chip capture. The asymmetric design of the blades allows them to effectively guide chips toward the extraction openings while the overall rotational symmetry of the complete blade wheel structure maintains balance. This localized asymmetry in blade shape combined with global symmetry in arrangement resolves the contradiction between suction efficiency and balance.
Solution Approach 2:
The blades exhibit local quality variations in their geometry and positioning, with leading edges specifically shaped and positioned to maximize chip capture efficiency in the critical zone near the tool. The local optimization of blade characteristics in this high-importance area achieves superior suction efficiency without requiring the entire structure to be asymmetric, thereby maintaining rotational balance and minimizing imbalance forces.
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 device achieves unprecedented suction capacity for capturing fine chips and dust, simplifies tool changes, and reduces manufacturing costs through additive manufacturing.
Implementation Method 1
a suction flow for drawing in the chips and/or dust is generated
Implementation Method 2
additive manufacturing of the computational model
Data Source
Figure 1~3
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AI summary
The invention relates to a suction device for suctioning off wood chips and/or dust generated during the cutting machining of a workpiece, in particular for a chuck (10) for receiving a rotationally driven cutting tool (12), particularly a cutting tool for machining CFK materials or other short-chipping materials, comprising a hub portion (14) that can be rotationally driven, which supports a plurality of radial blades (16) that are evenly distributed in a circumferential direction. In each case, a blade entering edge (20) of the blade (16) extends axially away from the hub portion (14) and radially outwards to a ring portion (18) that stabilizes the blades (16) and is concentric with respect to the hub portion (14). The invention further relates to a production method for producing the suction device.