Endless Abrasive Belt Lamination for Uniform Grinding Surfaces
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Solution Overview
Problem
Existing endless abrasive belts have spatially non-uniform surface structures due to joints, leading to visible defects during grinding operations.
Innovation Solution
A method and apparatus for producing endless abrasive articles by forming a laminated sleeve using a mandrel coil with a continuously moving supporting surface, allowing precise alignment and control of strip placement to minimize seam width and orientation, resulting in a spatially uniform abrasive article.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an endless abrasive belt is formed by cutting a piece from an abrasive cloth strip and joining the two ends with adhesive, then the abrasive belt can be produced continuously, but the surface structure becomes spatially non-uniform due to the joint causing visible defects
Solution Approach 1:
The patent applies dimensional change by transitioning from a planar joining approach to a three-dimensional spiral configuration. The abrasive cloth is wound in a spiral pattern around a mandrel, and the ends are joined at an angle to the spiral direction, distributing the joint over a longer arc length and reducing its impact on surface uniformity in the grinding direction.
Solution Approach 2:
The patent implements preliminary action by pre-forming the abrasive cloth into a spiral configuration around a mandrel before joining the ends. This pre-shaping ensures that the joint is positioned optimally within the spiral pattern, allowing the abrasive belt to achieve uniform surface structure while maintaining continuous production capability.
2Strength
If the abrasive belt is made from multiple strips laminated together, then the structural integrity is improved, but the alignment precision between strips becomes difficult to control
Solution Approach 1:
The patent introduces a mandrel as an intermediary tool that provides a precise reference surface for laminating multiple strips together. The mandrel's rotating surface ensures that each strip is positioned accurately relative to the others, maintaining consistent alignment throughout the laminated structure while building structural integrity through multiple layers.
Solution Approach 2:
The patent applies dynamics by using a rotating mandrel that moves the abrasive cloth and strips through a controlled motion process. This dynamic positioning allows for precise alignment of multiple strips during lamination, as the rotating mandrel maintains consistent angular relationships between strips while enabling continuous production.
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 method and apparatus ensure a uniform surface for grinding, minimizing tracking problems and defects, and facilitating high-quality grinding processes.
Implementation Method 1
The surface of the supporting portion CMB0 may pull the strips S1, S2 and may wind the strips S1, S2 on the mandrel coil 200 so as to form the laminated sleeve SLEEVE1
Implementation Method 2
The strips S1, S2 may be joined together by using an adhesive ADH1, and the supporting portion CMB0 may support the strips S1, S2 during initial curing of the adhesive ADH1
Data Source
AI summary
A method for producing endless abrasive articles (100) includes providing a mandrel coil (200), which comprises a first complete turn (B0A) formed of an endless mandrel belt (B0), feeding the endless mandrel belt (B0) to an input end (IN0) of the mandrel coil (200) and unwinding the mandrel belt (B0) from an output end (OUT0) of the mandrel coil (200) so as to move the surface of the first complete turn (B0A) of the mandrel coil (200), forming a laminated sleeve (SLEEVE1) by feeding a first strip (S1) on the moving surface of the first complete turn (B0A) of the mandrel coil (200), and forming an endless abrasive article (100) by cutting the laminated sleeve (SLEEVE1).