Torsion Bar Spring Testing Machine
The Torsion Bar Spring Testing Machine, also known as a Torsion Bar Spring Fatigue Testing Machine, is mainly used for static torsional mechanical performance testing and torsional fatigue life testing of automotive torsion bar springs.The testing machine is computer-controlled and can acquire data such as torque, peak torque, rotation angle, and test curves. It can measure the torsion angle reached by a torsion bar spring under a specified torque, as well as the torque reached at a specified torsion angle.The software displays torque-time, torsion angle-time, and torque-angle test curves. Test reports can be generated automatically, while test data can be stored, retrieved, and printed.For fatigue testing, the machine can perform torsional fatigue life tests on torsion bar springs at a specified test frequency under a preset torque or torsion angle. The machine automatically stops when the preset number of test cycles is reached or when the specified force/torque attenuation value is reached.
Standards
GB/T 1239.4-2009 — Cold Coiled Cylindrical Helical Springs — Technical Specifications — Part 4: Torsion Bar Springs
GB/T 2611-2022 — Testing Machines — General Requirements
Specification
| Item | Specification | ||||
|---|---|---|---|---|---|
| Model | 50 N·m | 100 N·m | 200 N·m | 500 N·m | 1000 N·m |
| Maximum Test Torque | 50 N·m | 100 N·m | 200 N·m | 500 N·m | 1000 N·m |
| Testing Machine Accuracy Class | Class 1.0 / Class 0.5 | ||||
| Minimum Torque Resolution | 0.001 / 0.01 / 0.1 N·m | ||||
| Minimum Torsion Angle Resolution | 0.1° | ||||
| Relative Error of Torque Indication | ≤ ±0.5% | ||||
| Relative Repeatability Error of Torque Indication | ≤ 0.5% | ||||
| Torque Loading Direction | Clockwise and Counterclockwise | ||||
| Test Travel | 300–800 mm, customizable | ||||
| Speed Control Range | 0.1–720°/min | ||||
| Speed Control Accuracy | ±1% | ||||
| Testing Machine Accuracy Class | Class 1.0 / Class 0.5 | ||||
| Rotation Angle Measurement Range | 0° ± 99999.99° | ||||
| Protection Function | Dual protection: mechanical and software | ||||
Main Features
Static and Fatigue Testing: Supports static torsional performance testing and torsional fatigue life testing of torsion bar springs.
Computer-Controlled Operation: Automatic test control, data acquisition, processing, storage, retrieval, and report generation.
Bidirectional Torque Loading: Supports torque loading in both clockwise and counterclockwise directions.
High-Precision Torque Measurement: Torque indication relative error ≤±0.5%, with repeatability error ≤0.5%.
Wide Torque Range: Available in 50. 100. 200. 500. and 1000 N·m models.
Angle Measurement: Minimum torsion angle resolution of 0.1°, with an angle measurement range of 0° ± 99999.99°.
Wide Speed Range: Speed control range of 0.1–720°/min, with speed control accuracy of ±1%.
Adjustable Test Travel: Test travel of 300–800 mm, customizable according to specimen requirements.
Curve Display: Displays torque-time, torsion angle-time, and torque-angle test curves.
Automatic Fatigue Test: Can automatically stop when the preset number of cycles or specified torque/force attenuation value is reached.
Safety Protection: Equipped with dual mechanical and software protection systems, including overload and abnormal-operation protection.
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