Grinding Disc Cover Body Composite Structure
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Solution Overview
Problem
Existing grinding discs lack effective protection against mechanical damage, particularly during eccentric or non-rotary movements, and inadequate dust extraction systems lead to operational inefficiencies.
Innovation Solution
A cover body with a reinforced structure comprising a support wall, working wall, and an elastic cushion, connected by a connecting device, which encloses the cushion body and features a sealing element to prevent damage and enhance dust extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cushion body is made elastic and compliant for dust extraction, then dust extraction efficiency is improved, but mechanical strength and resistance to damage deteriorate
Solution Approach 1:
The cover body combines multiple materials with different properties: an elastic cushion body material (first material) for dust extraction and a more tensile-resistant material (second material) for mechanical strength. This composite structure allows each material to perform its optimal function - the elastic material deforms to extract dust while the stronger material provides structural integrity and protection against mechanical damage.
2Strength
If the cushion body is made thicker for better cushioning, then protection against mechanical damage is improved, but device complexity and weight increase
Solution Approach 1:
Instead of uniformly thickening the cushion body, the invention uses a composite structure where a thinner layer of highly tensile-resistant material is applied over the elastic cushion body. This provides equivalent or superior mechanical protection with less material and reduced complexity compared to a uniformly thick elastic structure.
3Reliability
If the outer circumference is reinforced for protection, then mechanical durability is improved, but flexibility and adaptability deteriorate
Solution Approach 1:
The reinforcement is applied locally at the outer circumference where mechanical damage is most likely to occur, while the central and inner regions maintain their elastic and flexible properties. This localized approach provides durability where needed without compromising the overall flexibility and adaptability of the cover body for dust extraction.
Solution Approach 2:
The outer circumference uses a composite structure with tensile-resistant material providing durability while the underlying elastic cushion body maintains flexibility. This layered composite approach allows the structure to be both durable and adaptable to different operating conditions.
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 reinforced structure protects the grinding disc from mechanical damage, while the sealing element effectively seals cavities to prevent dust ingress, maintaining operational efficiency and balance.
Implementation Method 1
the cushion body is made of foam, for example polyurethane foam or similar materials. Therefore, the pillow body is elastic and flexible.
Implementation Method 2
the cushion body is protected against mechanical damage by the support wall body, the processing wall body and the connecting device on the outer circumference of the cover body
Data Source
Figure 1~8
Figure 2~3
Figure 4~5
AI summary
The invention relates to a grinding disc (40) for a grinding machine (15), with a drive bracket (49) arranged on its machine side (41) for rotationally fixed attachment to an output (26) of the grinding machine (15), so that the grinding disc (40) can be driven by the grinding machine into a grinding motion suitable for grinding a workpiece (W), in particular a rotary and/or eccentric motion, wherein the grinding disc has a machining side (42) opposite the machine side (41) with a machining surface (45) on which an abrasive (90) for abrasive machining of a workpiece (W) can be fixedly or detachably arranged by means of an adhesive layer (66), wherein inlet openings (48) for the inflow of dust-laden air (S) are arranged on the machining surface (45) and outlet openings (43) connected to these via through channels (59) are arranged on the machine side (41).wherein the outlet openings (43) are arranged in an extraction zone (44) within an annular sealing element (80) arranged on the machine side (41) for sealing against a counter-seal element (36) of the grinding machine, wherein the grinding disc has a plate body (50) which has a support wall (54) provided for carrying the grinding medium (90), which is stiffened by a rib structure (55) whose ribs (56) project in front of the support wall (54) towards the machine side (41), wherein the ribs (56) define cavities (57) towards the machining side (42) which are closed by the support wall (54) and open towards the machine side (41). The invention further relates to a grinding machine which has such a grinding disc. It is provided that the sealing element (80) covers at least a part of the cavities (57) towards the machine side (41).