Rotary Grinding Wheel Unit with Rear Suction Hood
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Rotary grinding machines lack effective dust extraction systems, leading to health and environmental hazards and poor precision due to the lack of integrated suction mechanisms, which results in dust dispersal and reduced service life of grinding wheels.
Innovation Solution
A sanding plate unit with an integrated suction device attached to the drive shaft of the rotary sander, featuring perforated sanding discs with suction openings on the edge for efficient dust collection, allowing for dust-free operation and improved precision by maintaining visibility of the grinding wheel edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a suction hood completely surrounding the grinding wheel is used, then dust extraction is improved, but the user's view of the grinding wheel edge is blocked and precise sanding becomes difficult
Solution Approach 1:
The suction hood is extracted from completely surrounding the grinding wheel and repositioned to be located only in the rear area of the grinding wheel. This partial extraction maintains dust collection capability while removing the visual obstruction that prevented precise sanding.
Solution Approach 2:
The suction hood is segmented from a complete surrounding structure into a localized rear-positioned component. This segmentation allows the front area to remain open for visibility while the rear area continues to provide effective dust extraction.
2Productivity
If the grinding wheel is set at an acute angle to the workpiece for rotary sanding, then material removal rate is improved, but the suction hood cannot seal cleanly on the workpiece leading to poorer extraction
Solution Approach 1:
The suction hood is made rotatable about the drive shaft axis, allowing it to dynamically adjust its position and maintain proper sealing regardless of the grinding wheel's angular orientation during high-speed material removal operations.
Solution Approach 2:
The sealing mechanism is moved from a static planar contact to a rotational degree of freedom, allowing the suction hood to maintain sealing effectiveness in three-dimensional space as the grinding wheel operates at various angles.
3Object-affected harmful factors
If a suction hood is firmly connected to the machine housing, then extraction is provided, but the hood becomes considerably larger than the sanding pad and the sanding result cannot be seen
Solution Approach 1:
The suction hood is merged with the sanding pad assembly and driven directly by the sanding pad's drive shaft. This integration allows the suction hood to be much smaller than previous machine-housed designs while maintaining effective dust extraction.
Solution Approach 2:
The sanding pad assembly is given multiple functions: it provides both the sanding action and drives the suction hood simultaneously. This multi-functionality eliminates the need for a separate large machine-mounted hood.
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
Enhances dust extraction efficiency, prolongs the service life of grinding wheels, and enables precise sanding by ensuring dust is collected directly at the source without dispersal, improving both user safety and environmental impact.
Implementation Method 1
dust can be sucked off through the sanding disc on the rear side of the sanding disc by means of the suction hood
Data Source
AI summary
The present invention relates to a grinding wheel unit (1) for a rotary grinding machine (100), having a grinding wheel (10) with a front side (12) for securing a grinding disc (130) and a rear side (14), opposite from the front side (12), a drive shaft (20) of the grinding wheel (10), which can be secured to a tool holder (110) of the rotary grinding machine (100), and an extractor hood (30), which is pivotably secured to the drive shaft (20), wherein the grinding wheel (10) has extraction openings (16), (17), which pass through the grinding wheel (10), and the extractor hood (30) is arranged for extracting dust through the grinding wheel (10) to the rear side (14) of the grinding wheel (10). The invention also relates to a grinding wheel (10) for a rotary grinding machine (100) and to the use of a grinding wheel unit (1) or a grinding wheel (10).