Impact pendulum
The pendulum-shear is a precise test rig that applies repeatable shocks (izod, charpy) to steel specimens until they break;
THE SOLUTION PROVIDED BY LF TECHNOLOGIES
Main functions
Objective
The aim is to be able to carry out high-energy impact bending tests in accordance with standard NF EN 10045-1. These tests are carried out at high speed (production tests) to qualify all batches of sheet metal produced;
The bench must ensure total safety for the operator, while remaining extremely ergonomic to use.
Problematic Issues
- Ensures automatic positioning of the pendulum and on-the-fly catch-up after impact.
- The test is triggered very quickly once the operator has positioned the specimen, while ensuring that the specimen is positioned very precisely in relation to the hammer on impact.
- Automate test bench calibration
Solution and result
The bench is a pendulum impact tester complying with standard NF EN 10045, with a U-shaped hammer that can be fitted with different masses allowing tests from 300J to 800J.
The machine is equipped with a motorised arm that ensures :
- positioning the pendulum at the desired height (as a function of speed or energy)
- le largage automatique du pendule
- re-hooking the pendulum on the fly after impact
Energy is measured by a very high-resolution encoder.
Test cycle :
The motorised arm positions the pendulum at the desired height, then the safety door is unlocked. The operator positions the test tube on the support and closes the door. As soon as the door is closed, the system automatically refocuses the test tube, releases the pendulum, measures the energy, rehooks the pendulum and repositions it for the next test.
Thanks to this system, the specimen is broken less than 5 seconds after it is placed on the support by the operator, in complete safety.
Operator safety is ensured by redundant systems (double locking of the pendulum on the arm, automated output of a safety stop, double control loops for safety sensors, etc.) controlled by a safety PLC.
The machine is designed to allow rapid changeover of the cutter and specimen supports.
The software developed specifically for Labview by our engineers allows you to :
- calculate and display the energy absorbed by the test piece, with automatic compensation for the natural damping of the pendulum
- display the measurements tested
- paramétrer des consignes de tests d’impact
- edit and print reports.
- automated calculation of geometric calibration, damping and oscillation period measurements
Products testedA control PC, using software developed under LabVIEW, performs the control and measurement functions.
Impact pendulum test tube
Sample of Impact pendulum
Impact pendulum – impact test on test tube
OUR KEY TEST BENCH FOR THESE TESTS
Impact pendulum – Impact Charpy, Izod
MCMP
Main functions
Impact resistance is one of the most important properties to consider when designing a part or appliance. LF Technologies’ Impact pendulum testing machine is used to determine the resilience of a sample to an impact generated on it in accordance with ASTM and ISO standards. Impact pendulum test machines perform precise and repeatable impacts on a wide range of materials to determine the mechanical and physical characteristics of metals, polymers, composites, whether for R & D or quality control in production. Our machines carry out Charpy and Izod tests, which meet international standards. Our machines perform Charpy and Izod tests, which meet international standards.
Operating mode
The automatic specimen centering system ensures a simple and effective use of the impact pendulum. The specimens are impacted within 5 seconds following their removal from the temperature unit. The use is simplified thanks to the rapid change of the knife and specimens supports.
The motorized impact pendulum is equipped with a pneumatic hammer release system. The hammer resetting process is motorized for a better ease of use. A protective casing protects the operators during the displacement of the hammer.
Bench developed to meet these standards:
NF EN 10045-1
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Mechanical Division
Other sector applications
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