Tensile Testing Machine Vibration Validation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-speed tensile testing machines face challenges in accurately determining the validity of test results due to the influence of natural vibration, especially when the test duration is extremely short and the tensile speed is high, as natural vibrations can affect the test outcomes.
Innovation Solution
Incorporating a detection unit to measure the test period and a determination unit that assesses the validity of the test results based on the test period and natural vibration frequency, using the frequency spectrum to identify the natural vibration frequency and determining the test validity based on the specific cycle corresponding to this frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tensile speed is increased to improve productivity, then test duration is reduced, but natural vibration affects test result validity
Solution Approach 1:
The system performs preliminary measurement of the test period during the tensile test, and preliminarily identifies the natural vibration frequency of the testing machine. Based on these preliminary data, the system determines in advance whether the test result is valid before finalization, allowing high-speed testing to proceed without compromising reliability.
Solution Approach 2:
The system continuously monitors the test period and natural vibration frequency during the tensile test, and uses this feedback information to determine test result validity. The determination unit compares the measured test period against the identified natural vibration characteristics to validate results in real-time, ensuring reliability even at high tensile speeds.
2Productivity
If test period is shortened to improve productivity, then natural vibration interference increases, but measurement precision of test result validity becomes difficult
Solution Approach 1:
The system preliminarily identifies the natural vibration frequency of the testing machine through frequency spectrum analysis before or during the test. This preliminary identification establishes a reference baseline that enables accurate validity determination even when the test period is extremely short, maintaining measurement precision despite reduced test duration.
Solution Approach 2:
The system changes the approach from direct time-domain measurement to frequency-domain analysis by identifying natural vibration frequency through frequency spectrum. This parameter transformation allows the system to accurately determine test validity based on frequency characteristics rather than purely time-based criteria, improving precision in short-duration tests.
Data Source
AI summary
A high-speed tensile testing machine conducts a tensile test on a test piece by applying a test force to the test piece. The high-speed tensile testing machine includes a detection unit configured to detect a test period indicating a time from when the test piece starts to deform under action of the test force to when the test piece breaks, and a determination unit configured to determine validity of a test result of the tensile test, on the basis of the test period and natural vibration of the high-speed tensile testing machine. Specifically, in the case where the test period is a predetermined multiple or more of a specific cycle indicating a cycle of the natural vibration of the high-speed tensile testing machine, the determination unit determines that the test result of the tensile test is valid.