Intermittent Contact Tribometer for Rubber Wear Testing
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Solution Overview
Problem
Existing tribometers require long test durations, often ranging from 50 to 4000 hours, to measure wear and friction properties of rubber materials, which is time-consuming and hinders the development of new materials.
Innovation Solution
A device and method utilizing a rotating disk with intermittent contact, allowing independent control of sliding velocity, dynamic loading, and contact time, enabling faster measurement of friction and wear properties under various experimental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional tribometers are used to measure wear and friction properties, then measurement accuracy is maintained, but test duration becomes excessively long (50-4000 hours)
Solution Approach 1:
The patent replaces the traditional mechanical weighing method with optical measurement systems (cameras, laser displacement sensors, confocal microscopes) to measure wear depth and volume in real-time during the test, eliminating the need for long-duration tests followed by sample removal and weighing
Solution Approach 2:
The patent creates optical copies (images, 3D reconstructions, point clouds) of the wear surface that can be analyzed digitally to determine wear characteristics, allowing rapid assessment without physical manipulation of the sample
2Measurement precision
If samples are removed and weighed to determine wear rate, then wear measurement is achieved, but test complexity and sample handling requirements increase
Solution Approach 1:
The measurement system performs wear assessment automatically on the sample while it remains in the test apparatus, using optical sensors and imaging systems that capture wear data without requiring sample removal, weighing, or complex handling procedures
3Productivity
If dynamic measuring systems with sensors are used, then real-time wear measurement is achieved, but the system requires continuous contact and cannot easily vary sliding velocity and contact time independently
Solution Approach 1:
The patent employs independent motor controls for the friction surface and sample holder that enable dynamic adjustment of sliding velocity, contact time, and loading conditions during the test, allowing the system to adapt to various test protocols while maintaining real-time optical measurement capabilities
Solution Approach 2:
The measurement system is designed to handle multiple test configurations (intermittent and continuous contact, varying velocities and loads) using the same optical measurement platform, making it versatile for different wear test standards and research applications
Data Source
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AI summary
The present invention provides a device and method for testing wear and friction properties of different materials under various experimental conditions representative of real usage conditions. In general, the device according to the invention is based on contacting a sample with a rotating disk with intermittent contact, in "open cycle" conditions, where dynamic loads are applied to the sample for the contact to occur. The control of dynamic loading is fully independent of the disk rotation.