LNZ‑100C Torsional Impact Durability Tester | ｜EPS Torque Sensor Reliability Professional Test Platform

EPS electric power steering system is the core component of the vehicle's safe driving, and * * torque sensor * * as the signal sensing core of EPS directly collects steering torque signal to determine the accuracy of power output. When the vehicle is running, the steering mechanism will frequently bear alternating and instantaneous impact torque loads, and the torsion bar, sensing element and structural parts inside the sensor will be repeatedly loaded for a long time. Once fatigue failure and signal drift occur, the steering control safety will be directly affected.

In the process of parts research and development, type inspection and factory sampling inspection, it is necessary to simulate the impact condition of the real vehicle by bench to verify the fatigue durability of the product. * **LNZ‑100C Torsional Impact Durability Tester * *, specially developed for EPS torque sensor, can reproduce all kinds of torsional impact and alternating torque conditions, and accurately evaluate the service life, signal stability and failure mode of parts. It is the key test equipment for automobile parts enterprises and scientific research and testing institutions.

# # I. Main test capability of equipment

This testing machine is aimed at the development of EPS electric power steering torque sensor, and mainly completes the following test items:

1. Torsional impact endurance test: simulate the repeated impact torque condition of the real vehicle, and check the long-term cyclic fatigue life of the sensor;
2. Reverse drive fatigue test: verify the stability of sensor structure and signal output under reverse load;
3. Reverse impact strength (peak torque impact damage) test to test the ultimate impact resistance of parts;
4. Alternating torque fatigue test, complete sine, step and user-defined waveform torque loading test.

During the test, the output signal of the measured sensor is monitored synchronously, the signal drift and abnormal fluctuation in the fatigue process are captured, and the failure mode of parts is identified, which is widely used in new product research and development verification, type inspection and factory sampling inspection.

# # Second, the whole machine structure and core hardware advantages

The whole equipment is divided into four units: the main machine mechanical platform, the impact loading actuator assembly, the special fixture system and the microcomputer measurement and control system, with strong mechanical rigidity, rapid loading response and convenient clamping.

* * High-rigidity main machine mechanical platform * *
The base of the main engine adopts integral casting base and welded base of steel plate. After stress relief annealing, the whole machine has high rigidity and minimal deformation during loading. Equipped with horizontal adjustment support foot pads to quickly complete equipment leveling. The sliding table adopts linear guide rail structure, which can flexibly adjust the installation position and adapt to EPS torque sensors with different appearance specifications; The platform body is reserved with safety protection baffle interface to meet the mechanical safety protection specification.

* * Dynamic loading unit of servo electric actuator * *
Servo motor and high-precision ball screw drive are adopted as the power core, with small transmission gap and fast response. It can output step impact torque, sinusoidal alternating torque and user-defined waveform torque, and completely realize the cyclic action of impact load protection and unloading; The actuator has its own displacement feedback, which records the loading stroke in real time and accurately restores the dynamic impact load of the real vehicle.

* * Quick-change special fixture system * *
Equipped with EPS torque sensor special quick-change tooling to realize rapid disassembly and assembly of the tested part; Precision machining of fixture positioning datum ensures installation coaxiality and avoids interference of additional bending moment on test results; The tooling is equipped with anti-loosening locking mechanism, so it will not slip and loosen in high-frequency impact cycle test; The standard sensor calibration interface is reserved to facilitate the periodic measurement and calibration of equipment and ensure the accuracy and traceability of test data.

* * Microcomputer intelligent measurement and control system * *
It consists of industrial control computer, signal acquisition module, control cabinet and professional measurement and control software. All test parameters, waveform editing and data monitoring are completed on the computer side; Real-time acquisition of key data such as torque, cycle times, stroke, etc., and automatic monitoring of the output signal of the measured sensor. When the torque exceeds the limit, the signal is abnormal, and the set number of cycles is reached, the equipment will automatically stop to protect the safety of the sample and the equipment.

# # # Core technical parameters

form

| Project name | Technical parameters |
| --- | --- |
| Maximum test torque | 100N·m |
| Maximum loading force | 400N |
| Test force accuracy | 1% (static calibration) |
| Test arm length | 500±0.5mm |
| Test frequency | 0‑2Hz |
| Effective stroke of actuator | 150mm |
| Control mode | Microcomputer automatic control |

# # III. Software System Functions

The software integrates various test modes, with simple operation and complete functions to meet different test requirements:

1. ** Parameter configuration * *: Set the target torque, impact amplitude, test frequency, total cycle times and various protection thresholds;
2. ** Real-time monitoring * *: The interface synchronously displays the real-time torque, current cycle times and loading stroke, and draws the torque-time dynamic curve;
3. ** Multi-test mode * *: Cyclic durability mode, single impact mode and step overload impact mode, which are suitable for different test standards;
4. ** Multi-conditional shutdown * *: the number of stops is reached, the torque exceeds the limit, and the signal is abnormal to automatically stop;
5. ** Data management * *: automatically save each group of original test data, and support historical test record query and waveform playback;
6. ** Report output * *: Automatically integrate equipment information, test conditions and test results, and support exporting files or printing directly, which is convenient for filing test reports.

# # IV. Perfect safety protection system

Equipment safety protection mechanism is constructed from hardware, software and electrical layers to ensure the safety of operators and equipment;

1. ** Hardware emergency stop * *: The operation console is equipped with a red emergency stop button, and the loading power is cut off with one button in case of emergency;
2. ** Software limit * *: torque upper and lower limit protection, actuator stroke limit, and stop loading immediately if the threshold is exceeded;
3. ** Acousto-optic alarm * *: Acousto-optic alarm when the load exceeds the protection threshold, and the test is terminated at the same time;
4. ** Electrical protection * *: Integrated leakage protection and fuse overload protection to avoid the risk of electrical failure.

# # V. List of Supply Configuration

1. One set of main machine body of test bench.
2. A set of servo electric actuator and transmission mechanism.
3. A set of special installation tooling for EPS torque sensor.
4. A set of microcomputer measurement and control system (industrial computer, display and control cabinet)
5. A set of special control software for equipment
6. Horizontal adjustment anchor and complete set of connecting cable accessories
7. Product description and ex-factory inspection report

# # VI. Application fields

Auto parts enterprises: research and development optimization, type verification and factory quality sampling of EPS torque sensor;
Automobile factory: reliability test of steering parts, parts access verification;

Scientific research institutes and third-party testing institutions: carry out experimental research on torsional impact fatigue and complete testing and evaluation.

The safety of automobile steering parts is related to the safety of vehicle driving. LNZ‑100C torsional impact endurance testing machine, relying on servo dynamic loading technology, special tooling and intelligent measurement and control software, truly simulates the vehicle impact working condition, and provides reliable test data support for the design iteration and quality control of EPS torque sensor.
If you want to know the detailed equipment configuration, non-standard customization and technical solution consultation, please contact us.