Vacuum Channel Grinding Plate for Flexible Abrasive Attachment
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Solution Overview
Problem
Existing sanding pad technologies face challenges in efficiently and cost-effectively attaching abrasive materials to sanding devices, particularly for processing both flat and uneven surfaces, and require manual labor for material changes, limiting versatility and flexibility.
Innovation Solution
A sanding disc with a central vacuum channel perpendicular to the sanding plane allows for secure suction attachment of abrasive materials without manual fasteners, enabling processing of flat and curved surfaces using flexible abrasives and adaptable materials like plastics, which can be easily integrated into various sanding machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple suction ducts are arranged in a star shape to attach flexible sanding material, then the sanding material can be securely fastened, but the device complexity increases and manual assembly is required
Solution Approach 1:
The suction duct is divided into multiple branches (first, second, third suction ducts) that extend radially from the central through-hole. This segmentation allows the vacuum force to be distributed to multiple attachment points around the perimeter, securely fastening the sanding material without requiring a complex multi-duct star arrangement.
Solution Approach 2:
The central through-hole serves multiple functions: it provides the primary vacuum source, allows passage of the vacuum hose through the sanding pad, and acts as a structural core around which the suction ducts are arranged. This multi-functionality reduces overall device complexity while maintaining attachment security.
2Reliability
If a rigid sanding pad is used with vacuum attachment, then the vacuum can be maintained during machining, but the sanding pad cannot be adapted to curved or uneven surfaces
Solution Approach 1:
The sanding pad is designed with flexible materials that allow it to deform and adapt to curved or uneven workpiece surfaces. The flexible construction includes flexible side walls and a flexible base, enabling the pad to conform to various surface geometries while the vacuum system maintains secure attachment through the flexible structure.
Solution Approach 2:
The sanding pad incorporates flexible side walls and a flexible base that can bend and conform to the contours of workpieces. This flexibility allows the vacuum attachment to maintain reliability on curved surfaces, as the flexible materials can deform without breaking the vacuum seal while adapting to the surface geometry.
3Reliability
If abrasive material is arranged in a depression in the grinding disc, then vacuum attachment is achieved, but only flat surfaces can be processed
Solution Approach 1:
The sanding pad and abrasive material are designed with flexible constructions that allow them to deform and adapt to curved or uneven surfaces. The flexible side walls and base enable the entire assembly to conform to various surface geometries while maintaining vacuum attachment, eliminating the limitation to flat surfaces only.
Solution Approach 2:
The flexible base and side walls allow the sanding pad to bend and conform to the contours of workpieces. This flexibility enables the vacuum attachment system to maintain reliable contact on curved surfaces, as the flexible materials can deform to match the surface geometry while preserving the vacuum seal.
4Reliability
If manual fastening methods (screws, glue, Velcro) are used to attach sanding material, then secure attachment is achieved, but the changing process is time-consuming and cannot be automated
Solution Approach 1:
The sanding material features self-adhesive properties that allow it to attach automatically to the sanding pad when vacuum is applied. The adhesive layer on the sanding material activates under vacuum pressure, creating secure attachment without requiring manual application of fasteners. This enables automatic material changes by simply applying and releasing vacuum.
Solution Approach 2:
The mechanical fastening systems (screws, glue, Velcro) are replaced with a vacuum-based attachment system. The vacuum force, applied through the central through-hole and suction ducts, creates secure attachment of the sanding material without mechanical components. This substitution enables automated material changes and eliminates manual assembly operations.
5Loss of time
If a central vacuum channel is used to attach abrasive material, then setup time is reduced and automation is enabled, but the attachment security may be insufficient for thin abrasives
Solution Approach 1:
The vacuum force from the central through-hole is segmented and distributed through multiple radial suction ducts to different attachment points around the perimeter. This segmentation of the vacuum force ensures that thin abrasives are securely held at multiple locations simultaneously, preventing detachment while maintaining quick setup through automated vacuum application.
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
This solution reduces setup time and costs by automating abrasive attachment, allows for flexible and secure fastening of thin abrasives, and enables efficient processing of diverse surfaces, including curved ones, with improved mobility and compatibility with different sanding devices.
Implementation Method 1
a channel for attaching the abrasive material by means of a vacuum being arranged in the sanding pad
Data Source
Figure 1~3
Figure 4~5
AI summary
A grinding plate has a receptacle on to which the grinding material is fixed by the action of suction. In the grinding plate (2) is arranged a channel (4) for securing the grinding material (5) by vacuum, normal to the grinding plane (8), in which the channel (4) is located in the central region of the grinding plate (2).