Super-abrasive Grinding Wheel Diamond CBN Grain Topology
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Solution Overview
Problem
Conventional super-abrasive grinding wheels face issues with unsatisfactory workpiece surface roughness and short tool life, depending on the workpiece type, processing conditions, and tool specifications.
Innovation Solution
A super-abrasive grinding wheel with a core and a single layer of diamond and CBN abrasive grains fixed by a binder, where the diamond abrasive grains have projecting tips with optimized height variations and irregularities, complementing each other to prevent excessive crushing of CBN grains and enhance tool longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional super-abrasive grinding wheels are used, then grinding capability is provided, but workpiece surface roughness is unsatisfactory and tool life is short
Solution Approach 1:
The invention applies local quality by creating specific surface characteristics on the abrasive grains. The projected tips of diamond and CBN abrasive grains are configured with controlled height variations (standard deviation of 5μm or less) and irregularities (average height of 0.05μm or more), creating localized quality differences that enable simultaneous achievement of smooth surface finish and sustained cutting capability throughout the tool life
Solution Approach 2:
The invention changes critical parameters of the abrasive grain configuration: controlling the height variation of projected tips to have a standard deviation of 5μm or less, and ensuring diamond abrasive grains have irregularities with an average height of 0.05μm or more. These parameter optimizations resolve the contradiction by creating a balanced surface topology that provides both cutting sharpness and surface quality while maintaining tool life
2Reliability
If single layer configuration of diamond and CBN abrasive grains is used, then complementarity between grain types is achieved, but manufacturing complexity increases
Solution Approach 1:
The invention merges diamond and CBN abrasive grains into a single integrated layer configuration. This merging approach allows the two different abrasive materials to work complementarily in close proximity, with diamond grains providing initial cutting action and CBN grains maintaining the cutting edges, achieving reliable and consistent tool performance without requiring complex multi-layer structures
Data Source
AI summary
A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder. The diamond abrasive grains and the CBN abrasive grains have projecting tips acting on a workpiece, the projecting tips having a variation in height of 10 μm or less, the diamond abrasive grains having their projecting tips with irregularities of 0.1 μm or more in height.