Optical Grinding Tool Inspection for Shape Retention Accuracy
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Solution Overview
Problem
Galvanic grinding tools, coated with diamond or CBN abrasive grains, pose challenges for tactile measurement due to surface graininess and hardness, leading to rapid destruction of probe tips, necessitating a more robust and efficient testing method.
Innovation Solution
A method and device for contactless, optical testing using a 3-dimensional vector model comparison, where the grinding tool is rotated and irradiated with light, with reflected information processed to determine deviations from a target model, enabling fast and precise shape retention assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tactile measurement methods are used on galvanic grinding tools, then measurement can be performed, but the probe tip is rapidly destroyed due to surface graininess and hardness
Solution Approach 1:
The patent replaces the mechanical tactile measurement system with an optical measurement system. Instead of using a physical probe tip that contacts the grinding tool surface, the invention uses light to measure the shape and profile of the galvanic grinding tool. This substitution eliminates the mechanical contact that causes probe tip destruction while maintaining measurement capability.
Solution Approach 2:
The patent introduces light as an intermediary medium between the measurement system and the grinding tool surface. Rather than direct mechanical contact, light serves as the mediator that carries measurement information from the tool surface to the sensor, avoiding the harmful interaction between the probe tip and the hard, grainy surface.
2Measurement precision
If traditional testing methods are used on galvanic grinding tools, then measurement can be performed, but the testing process is time-consuming and not robust
Solution Approach 1:
The optical measurement system enables faster data acquisition compared to traditional mechanical tactile methods. The light-based measurement can capture the entire surface profile simultaneously or in rapid succession, eliminating the slow point-by-point mechanical scanning process while providing comprehensive shape retention assessment.
Solution Approach 2:
The patent uses optical methods to capture three-dimensional surface information in a single measurement pass, rather than relying on slow sequential mechanical probing. This dimensional approach to measurement significantly increases testing speed while maintaining precision.
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 approach allows for quick and precise testing of galvanic grinding tools, overcoming the limitations of tactile measurement methods by providing a non-destructive, in-line assessment of shape retention and profile accuracy.
Implementation Method 1
the grinding tool is at least partially irradiated during rotary driving by light which emanates from an emitter of the testing apparatus, and that at least part of the light is reflected by the grinding tool in the direction of a sensor of the testing apparatus
Data Source
AI summary
Apparatus with a rotationally drivable receptacle for a grinding tool to be tested, wherein the apparatus comprises:an optical testing apparatus arranged such that the grinding tool, while being rotatably driven, is at least partially irradiated by light emanating from an emitter of the testing apparatus, and that at least a portion of the light from the grinding tool is reflectable in the direction towards a sensor of the testing apparatus, wherein the sensor is adapted to provide test information,a computing device which is designed for processing the test information in order to determine a 3-dimensional vector model of the grinding tool from macroscopic basic information,a memory in which a target vector model is stored,a computing device which is designed for comparing the vector model with the target vector model in order to enable the determination of deviations between the vector models.