Disc Tool Adhesive Recesses for Bolt-Head Wear Reduction
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Solution Overview
Problem
Existing disc tools for grinding and polishing machines experience increased wear and reduced processing quality due to the adhesive layer unevenness around bolt heads, particularly in machines making eccentric or oscillating movements, leading to rapid wear and impaired performance with larger diameter grinding discs.
Innovation Solution
Incorporating recesses in the adhesive layer around bolt heads to allow for the mobility of the retaining wall and cushion elements, reducing direct contact and pressure points, and enabling a more flexible attachment mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the retaining wall element and cushion element are attached to the carrier using retaining bolts with bolt heads, then the attachment strength and reliability are improved, but the adhesive layer becomes uneven in the region of the bolt heads, causing increased wear and reduced processing quality
Solution Approach 1:
The adhesive layer is designed with different properties in different regions: in the region of the bolt heads, the adhesive layer has a greater thickness or is reinforced to accommodate the bolt heads and distribute the mechanical loads, while in other regions it maintains the standard thickness for optimal bonding. This local variation in adhesive layer quality resolves the contradiction by providing both attachment strength at critical points and overall layer uniformity.
Solution Approach 2:
The adhesive layer is segmented into different functional zones: a reinforced zone around the bolt heads that handles mechanical attachment, and a standard bonding zone for workpiece attachment. This segmentation allows each zone to be optimized for its specific function, resolving the contradiction between attachment strength and layer uniformity.
2Adaptability or versatility
If the disc tool is used for eccentric or oscillating grinding movements, then the processing versatility and adaptability are improved, but high shear forces and transverse loads occur, exacerbating the wear of the adhesive layer and reducing its durability
Solution Approach 1:
The adhesive layer is designed with increased thickness or reinforcement in the regions around the bolt heads before the tool is put into service. This beforehand cushioning provides a buffer against the high shear forces and transverse loads that occur during eccentric or oscillating grinding movements, preventing premature wear and extending the adhesive layer's lifespan while maintaining full processing versatility.
3Productivity
If larger diameter grinding discs are used, then the processing capacity and productivity are improved, but the problem of adhesive layer unevenness and wear is exacerbated due to increased centrifugal forces and loads
Solution Approach 1:
For larger diameter grinding discs, the adhesive layer is designed with locally reinforced regions around the bolt heads that can withstand the increased centrifugal forces and loads. This local quality enhancement ensures that the adhesive layer maintains its reliability and performance under the higher stresses generated by larger discs, while the overall processing capacity and productivity benefits of the larger diameter are preserved.
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 enhances the durability and processing quality by minimizing wear on the adhesive layer and maintaining consistent performance, even under high shear forces and transverse loads, thus extending the tool's lifespan and improving workpiece processing.
Implementation Method 1
a cushion element made of elastic material, in particular foam
Implementation Method 2
an adhesive layer is arranged on a side of the retaining wall element opposite the carrier, on which adhesive layer a processing means for grinding and/or polishing the workpiece
Implementation Method 3
the retaining wall element is held, in particular tensioned or clamped, between bolt heads of the retaining bolts and the carrier
Data Source
AI summary
A disc tool for a processing machine for grinding and/or polishing a workpiece (W); wherein the disc tool (10A, 10B, 10B) has a carrier (20) for attachment to an output (85) of the processing machine (80); wherein a cushion element (40A, 40B, 40C) made of elastic material and a retaining wall element (41A, 41B, 41C, 41D) for retaining the cushion element (40A, 40B, 40C, 61) are arranged on the carrier (20); wherein the retaining wall element (41A, 41B, 41C, 41D) is held on the carrier (20) by means of retaining bolts (35); wherein retaining bolt passage openings (48) of the retaining wall element (41A, 41B, 41C, 41D) extending through retaining mounts (28), of the carrier (20) are accommodated along bolt sections (36) of the retaining bolts (35) extending along the bolt longitudinal axes (BL), and the retaining wall element (41A, 41B, 41C, 41D) is held between bolt heads (37) of the retaining bolts (35) and the carrier (20); and wherein an adhesive layer (50) is arranged on a side of the retaining wall element (41A, 41B, 41C, 41D) opposite the carrier (20), on which adhesive layer a processing means (70) for grinding and/or polishing the workpiece (W) can be releasably attached to the disc tool (10A, 10B, 10B). The adhesive layer (50) has recesses (52) assigned to the bolt heads (37).