Rubber Wear Testing Device Stick-Slip Replication
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Solution Overview
Problem
Existing rubber wear testing devices fail to accurately determine wear resistance under varying operating conditions, particularly for conveyor belt upper cover rubber, due to their inability to replicate the stick-slip phenomenon and require complex structures or annular samples.
Innovation Solution
A rubber wear testing device with a holding unit, a rotation body, and a compression bonding mechanism that applies a constant force to a block-shaped test sample, allowing it to move opposite to the force, thereby reproducing the stick-slip phenomenon without needing an annular sample or complex structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an annular belt sample is used to test wear under conditions similar to actual operating conditions, then the accuracy of determining wear resistance is improved, but the device structure becomes complicated
Solution Approach 1:
The patent uses a simplified copying approach by replacing the complex annular belt sample with a block-shaped rubber sample that replicates the essential wear characteristics. The compression bonding mechanism copies the stick-slip phenomenon without requiring the full complexity of an annular belt configuration, thus achieving accurate wear resistance determination with a simpler device structure
Solution Approach 2:
The patent extracts the critical element of the wear test - the stick-slip phenomenon - from the complex annular belt system. By isolating and reproducing only the essential friction and deformation characteristics using a block sample and compression mechanism, the device achieves the same measurement accuracy without the complicated annular structure
2Device complexity
If conventional abrasion testers are used with preset constant conditions, then the device structure is simple, but the accuracy of estimating wear resistance in practical use deteriorates
Solution Approach 1:
The patent introduces dynamic conditions to the wear test by allowing the block-shaped rubber sample to move in the direction opposite to the additional force while being compressed against the rotating body. This dynamic movement reproduces the stick-slip phenomenon that occurs in practical conveyor belt operation, enabling accurate wear resistance estimation without excessive device complexity
Solution Approach 2:
The patent changes the test parameters from static preset conditions to dynamic varying conditions. The additional force is applied while the sample moves, creating varying contact pressures and friction conditions that mimic practical operation. This parameter change enables accurate wear resistance estimation while maintaining relatively simple device structure
3Ease of operation
If the stick-slip phenomenon is not taken into consideration in testing, then the device operation is simple, but the accuracy of determining wear state deteriorates
Solution Approach 1:
The patent enables the testing device to automatically reproduce the stick-slip phenomenon through the interaction between the compressed block sample and the rotating body. The sample naturally undergoes sticking and slippage cycles due to the applied additional force and permitted movement, without requiring complex control mechanisms. This self-service approach maintains simple device operation while achieving accurate wear state determination
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
Enables accurate determination of rubber wear state under practical conditions by replicating the stick-slip process, improving wear resistance assessment without the need for annular samples or complex devices.
Implementation Method 1
a compression bonding mechanism configured to apply an additional force oriented to the circular circumferential surface to the test sample held by the holding unit
Implementation Method 2
a process (sticking process) in which the rubber counteracts a force (frictional force) received from the target object and is elastically deformed
Implementation Method 3
when a target object and a rubber move relatively in contact with each other, and the target object slides to the rubber, both are not uniformly in contact with each other. In a stick-slip phenomenon, a process (sticking process) in which the rubber counteracts a force (frictional force) received from the target object
Data Source
AI summary
Provided is a rubber wear testing device including a holding portion for holding a test sample of rubber, and a compression bonding mechanism for applying an additional force oriented to a circular circumferential surface of a rotation body rotating such that the test sample is pressed to the circular circumferential surface at a predetermined fixed position and the movement of the test sample in a direction opposite to the additional force is always allowed.