Steel plate bending fatigue testing machine

Steel plate bending fatigue testing machine

1、 Introduction: The development of this series of testing machines draws on the experience of internationally renowned electro-hydraulic servo dynamic testing machine companies, adopting the development concept of "modularization, modularity, and standardization". The key supporting components of the electro-hydraulic servo dynamic testing machine are selected from well-known international and similar products. The system is stable and reliable, and the key units and components of the system adopt advanced international technology. The overall performance of the entire testing system is comparable to the product technology level of internationally renowned dynamic testing machine companies.
According to customer requirements, the electro-hydraulic servo plate bending fatigue testing system is mainly used for three-point bending fatigue mechanical performance testing of steel plate specimen structural components and parts, including compression, low cycle and other fatigue performance tests.
IISteel plate bending fatigue testing machineScheme description:
The electro-hydraulic servo plate fatigue testing machine mainly consists of a host, a constant pressure servo pump, a fully digital single channel servo controller, related testing software, and other necessary accessories. Rambo

1. Host: The host is a double column frame structure, with a 10kN servo linear actuator placed on the host crossbeam. The test fixtures are installed on the base and the top of the actuator piston rod respectively.
1.1. The host adopts a double column frame structure, and the outer surface of the columns is treated with electroplated hard chrome to further improve the aesthetic appearance and enhance the anti-corrosion ability;
1.2. The crossbeam can be raised and lowered to adjust the testing space, and has a locking device to ensure that the crossbeam remains locked in place when not in the testing state;
1.3. Install high-precision dynamic load sensors on the lower end face of the crossbeam for measuring test loads.
1.4. The front of the host workbench is designed with sample clamping, crossbeam movement, and emergency stop operation buttons for easy operation by testers.
1.5. Design a prestressing ring at the connection between the test attachment and the servo linear actuator screw.
2. Actuator: The servo linear actuator is the core component of the testing machine, and the testing machine outputs the test force through the actuator. Designed using proprietary technology, the actuator is placed on the main crossbeam and consists of the actuator body, hydraulic control module, and sensors.
3. Test attachments: Based on the characteristics of bending fatigue testing of sheet metal, the testing machine attachments use floating special test attachments to complete the test.
4. Constant pressure servo pump station: The constant pressure electro-hydraulic servo pump station is one of the products of the dynamic electro-hydraulic servo fatigue testing system. This series of products has the characteristics of easy use, stable pressure output, good reliability, and low noise. This series of products is designed based on the international advanced electro-hydraulic servo dynamic testing machine technology and combined with the actual usage conditions of users during the research and development process. The key components such as valve blocks are designed by our company, and the key purchased parts such as motors and oil pumps are all well-known international and similar products, greatly improving the stability and reliability of the system. The overall performance of the testing machine is comparable to the international advanced product technology level.
5. Full digital single channel servo controller:
The testing machine can be controlled to complete PID closed-loop dynamic testing control of the testing force or displacement channel. Dynamic testing is conducted with a certain test force or displacement, test frequency, and signal category (such as various waveform controls), or automatic control testing is performed according to user-defined frequency spectra (program control);
It has multiple control modes such as power, displacement, loading rate, displacement speed, etc., and the control modes can be smoothly switched;
The controller can also be used for controlling static tests, such as conducting static characteristic tests on the board;
Capable of starting/stopping, high/low voltage switching control of servo pump station, parameter calibration, zero point clearing, parameter storage and loading of various sensors, etc;
Operating system Windows XP, fully operated in Chinese. Display test data such as force, displacement, and frequency on the screen, and automatically draw various test curves such as time test force/displacement and test force displacement; Automatically perform data processing.
6. Control software for electro-hydraulic servo dynamic testing machine (system)
6.1 System management software: This software is the foundation of the entire digital servo controller, and its main functions are to manage the hardware resources of the control system, define sensors, adjust digital control parameters, set protection, display the current control mode, hydraulic and function generator status, and sensor calibration. It also provides dual track digital oscilloscopes, digital servo valve ammeters, and 6 digital voltmeters for real-time display of test data.
6.2 Function Generator Software: This software is mainly used for constant amplitude dynamic testing. The function generator software will automatically track and correct the peak and valley values of the control variable to ensure that the typical dynamic error value of each peak during the entire testing process is ± 0.5% FS. The software can choose from sine wave, triangular wave, and square wave waveforms. After the experiment is completed, the software will save some important data, such as test load, frequency, number of cycles, and test time. This software can also perform simple static tests.
6.3 Multi functional testing software: This software is a flexible and fully functional testing software that allows users to design special testing methods without the need for programming. This software presents various control functions, data acquisition functions, and other auxiliary functions of the servo controller in the form of icons on a panel. Users can drag and drop these function icons to the experiment definition panel with the mouse, and freely combine them according to their needs to conduct experiments according to their custom testing methods. This software can be used for random spectrum experiments.
Attached image: Software interface
7. Other necessary configurations:
7.1 Configure a set of specialized fixtures for bending fatigue of sheet metal
7.2 Configure flushing accessories for servo actuators and constant pressure servo pump stations.
IIISteel plate bending fatigue testing machineMain technical indicators:
1.1. Maximum dynamic test force: 10kN, amplitude fluctuation not exceeding ± 1% FS;
1.2. Maximum amplitude of actuator: ± 75mm, indication accuracy starting from 20% ± 0.5% FS;
1.3. Frequency range: 0.1 MHz; 20Hz;
1.4. Special board three-point bending fatigue test attachment: 200 * 20 * 6mm
1.5. Main test waveforms: sine wave, square wave, triangular wave, oblique wave, and external input waveform;
1.6. Control mode: two circuits for deformation and test force;
1.7. It has functions such as overload, fracture protection, and automatic shutdown at the end of the test;
1.8. Workbench size: 300 * 200mm.
1.9 Counter capacity: 108