Grinding Tool Wear Detection via Optical Sensor
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Solution Overview
Problem
The challenge in manufacturing high-quality components is the inefficiency and safety concerns due to wear and clogging of grinding tools, leading to increased process forces, temperatures, and loss of profile, which are not effectively addressed by current dressing methods based on empirical values.
Innovation Solution
An automated method using an optical sensor system with a camera and light source to detect the topographical surface of the grinding tool, allowing for spatially resolved imaging and evaluation of wear, enabling real-time determination of grinding ability and initiating dressing or replacement processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grinding tools are dressed at regular, short intervals based on empirical values, then quality reduction due to wear is prevented, but the actual potential of the grinding tools is not exhausted and process efficiency is reduced
Solution Approach 1:
The patent implements an optical sensor system that continuously monitors the topographical surface of the grinding tool and provides feedback signals to the control unit. This enables condition-based dressing only when actually needed, replacing fixed-interval preventive dressing with intelligent, real-time monitoring that optimizes both quality and productivity
Solution Approach 2:
The grinding tool's wear state is automatically detected by the optical sensor system without requiring external intervention or empirical schedules. The system self-monitors the tool condition and triggers dressing operations autonomously based on actual wear detection, eliminating the need for operator judgment and fixed maintenance schedules
2Measurement precision
If optical sensor systems are exposed to environmental conditions without protection, then real-time monitoring is achieved, but the sensor device is damaged by coolant, oil, and chips
Solution Approach 1:
The patent employs a transparent protective cover or window that shields the optical sensor from coolant, oil, and chips while allowing optical radiation to pass through. This protective barrier maintains sensor durability by excluding harmful environmental factors while preserving measurement capability through optical transparency
Solution Approach 2:
A transparent intermediate structure (protective cover or window) is introduced between the optical sensor and the harsh grinding environment. This intermediary element blocks harmful substances like coolant and chips from reaching the sensor while permitting optical radiation to pass through for continuous wear monitoring
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 the optimal utilization of grinding tools by extending their service life, preventing quality reduction, and optimizing the grinding process through precise monitoring and maintenance, thereby improving efficiency and reducing scrap and rework.
Implementation Method 1
a radiation profile of the radiation reflected and scattered directly from the effective surface of the grinding body and the topographical surface of the grinding body is detected
Implementation Method 2
a radiation profile of the radiation reflected and scattered directly from the effective surface of the grinding body and the topographical surface of the grinding body is detected
Data Source
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AI summary
The invention relates to a method and a device such as a detection device (1) for the automated determination of the grinding capability of a grinding tool (13) integrated into a grinding process of a grinding device with a geometrically undefined cutting edge, in particular a grinding wheel (12) arranged about a rotary axis and driven by rotation, by means of the detection device (1) integrated into the grinding process with a sensor system optically detecting at least a part of the topographic surface (11) of the grinding tool (13) and an evaluation device for the radiation detected by means of the optical sensor system.For the rapid, automated and qualitatively improved determination of the grinding capability of the grinding tool (13), during the grinding process at least one image is taken of at least one predetermined microscopic section of the topographic surface (11) of the grinding tool (13) by a single camera (3) provided as an optical sensor system under illumination by light from a light source arranged coaxially around the optical axis (z) of the camera (3) and by means of an image processing device provided as an evaluation device the at least one recorded image is compared with a reference image and the grinding capability of the grinding tool is determined on the basis of the comparison.