Grinding Disc Peripheral Suction for Dust Extraction
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Solution Overview
Problem
Existing grinding discs suffer from inefficient dust extraction, leading to dust re-deposition on the workpiece, which results in undesirable grinding effects due to dust not being effectively removed from the vicinity of the sanding disc during processing.
Innovation Solution
A grinding disc with an abrasive layer and a counter-adhesive layer that includes dust air flow openings and ducts, allowing dusty air to be sucked away from the workpiece surface both in the main flow direction and transversely, with dust air ducts positioned between the abrasion layer and the sanding pad to direct dust-laden air into inflow openings on the disc, enhancing dust extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional dust extraction through abrasive flow openings is used, then dust can be extracted from the workpiece surface, but dust still escapes into the vicinity of the grinding disc and re-deposits on the workpiece
Solution Approach 1:
The dust extraction system is segmented into multiple independent extraction paths: conventional extraction through abrasive flow openings for dust generated at the workpiece surface, and additional peripheral extraction channels with suction openings on the grinding disc periphery for dust in the vicinity of the disc. This segmentation allows each path to handle specific dust sources effectively without interfering with the other.
Solution Approach 2:
The invention adds a new spatial dimension to dust extraction by placing suction openings on the periphery of the grinding disc (radial direction) in addition to the conventional axial extraction through the abrasive. This multi-dimensional extraction approach captures dust from different locations and flow directions, preventing dust escape into the vicinity of the disc.
2Stability of the object's composition
If cross-flow of fresh air is provided between abrasive and grinding disc to prevent dust pockets, then dust pockets are prevented, but dust still escapes into the vicinity of the grinding disc
Solution Approach 1:
The air flow system is divided into two functional segments: cross-flow channels between the abrasive and grinding disc for preventing dust pocket formation, and peripheral suction channels on the grinding disc edge for capturing escaped dust. This segmentation allows each system to perform its specific function without compromising the other.
Solution Approach 2:
The peripheral suction channels act as an intermediary mechanism that captures dust particles before they can escape into the vicinity of the grinding disc. These channels provide an additional extraction path that complements the cross-flow system, ensuring dust is removed at multiple stages of its potential trajectory.
3Adaptability or versatility
If only conventional dust extraction through abrasive is used, then existing abrasives can be used without modification, but dust extraction from peripheral areas is insufficient
Solution Approach 1:
The extraction system is segmented into a primary extraction path through the abrasive (maintaining compatibility with existing abrasives) and a secondary peripheral extraction path through suction channels on the grinding disc. This segmentation allows the primary system to work with conventional abrasives while the secondary system addresses the specific problem of peripheral dust accumulation.
Solution Approach 2:
The grinding disc is designed with multi-functionality: it maintains the conventional abrasive interface for compatibility with existing abrasives, while simultaneously incorporating peripheral suction channels for enhanced dust extraction. This universal design allows the system to work with various abrasive types while providing improved dust extraction capability.
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 effectively removes dust from the workpiece surface, preventing re-deposition and improving grinding outcomes by ensuring that dusty air is directed into suction channels for efficient extraction, even from areas around the grinding tool where fine dusts may accumulate.
Implementation Method 1
the suction device has a suction channel which conveys dusty air away from the workpiece
Data Source
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AI summary
The invention relates to a grinding disc (40) for a hand-held grinding machine (10), with a drive bracket (33) for rotationally fixed attachment to an output (14a) of the hand-held grinding machine (10), so that the grinding disc (40) can be driven by the grinding machine (10) in a grinding motion suitable for grinding a workpiece (W), wherein a grinding disc body (57) of the grinding disc (40) has a working surface (42) provided with an adhesive layer (65) for the detachable attachment of an abrasive (80) provided with a counter-adhesive layer (82), in particular designed as a grinding sheet (90) and having an abrasive layer (81) for abrasive machining of the workpiece (W), wherein dust air inlet openings (44-48) are provided on the working surface (42) for the dust air generated during the machining of the workpiece (W),Dust-laden air (S) flowing in through dust air flow openings (84-88) of the abrasive (80) along a main flow direction (H) is arranged and is connected to at least one dust air outlet opening (50) on a machine side (31) of the grinding wheel (40) facing away from the machining surface (42) via an extraction duct arrangement (78), so that when the grinding wheel (40) is mounted on the grinding machine (10), an extraction device (25) of the grinding machine (10) can draw in dust air (S) flowing into the dust air inlet openings (44-48) through the at least one dust air outlet opening (50). The grinding wheel (40) has at least one dust air duct (61, 63) which has a dust air inlet (62) for conveying dust from the vicinity of the abrasive layer (81).64) between the abrasion layer (81) of the abrasive (80) and the machine side (31) of the grinding wheel (40) and is in direct flow communication with the at least one outlet opening (50) away from the abrasion layer (81).