This series of testing machines is designed and manufactured according to the national standard GB/T 16826-2008 "Electro hydraulic Servo Universal Testing Machine". It is a modular design scheme of A-type host+servo controlled oil source+microcomputer automatic control system.
The host adopts ultra-high stiffness design, and each load-bearing component undergoes finite element analysis, design, precision machining, and testing. The oil source system adopts a load adaptive throttling speed regulation system, which has undergone repeated pressure testing and load holding tests. The controller adopts a new generation of high-performance, intelligent fully digital independent controller. The measurement and control software adopts advanced measurement and control algorithm combination, which can accurately control the entire experimental process and fully meet the requirements of domestic and international material testing methods.
1. The host adopts a streamlined appearance design, with reasonable strength distribution of each component, beautiful and practical overall combination, and independent painting process. The painting effect and color can be customized according to customer needs to match the customer's on-site environment;
2. The whole machine adopts finite element stiffness analysis to design the stiffness, with minimal experimental deformation and long-term stable operation;
3. The coaxiality between the centerline of the upper and lower clamping heads and the tensile axis of the testing machine is 8% (significantly better than the requirements of the national standard for coaxiality of less than 15% for level 1 testing machines and less than 12% for level 0.5 testing machines);
4. High rigidity semi open jaw seat, high strength, small deformation, and stable clamping;
5. The lead screw is made of high-performance carbon structural steel precision machining, and the lead screw tension nut is made of QT500-7, with a low friction coefficient and high transmission efficiency;
6. The oil cylinder adopts imported sealing rings, which have low friction resistance and are conducive to flexible and precise control. At the same time, the oil cylinder and piston never wear out;
7. The upper and lower clamping heads are made of cast steel material (material ZG310-570), cast using lost foam casting, and processed by heat treatment, shot peening, and precision machining; High stiffness and small experimental deformation;
8. The machine adopts a cylinder mounted structure, with a reasonable layout of the test space that conforms to ergonomic principles;
9. The hydraulic system adopts servo closed-loop control and is equipped with highly responsive servo valves. The directional valve, sequence valve, etc. all use high-precision component valve cores, which have fast response, high sensitivity, tracking, follow-up, adjustability and other functional characteristics. It can achieve fully automatic precise control and is currently the most advanced, high-quality and high-end hydraulic servo system in testing machines;
10. The hydraulic system design fully considers energy conservation, reliability, safety, and environmental protection. Adopting a differential pressure throttling speed control servo servo system, the system's working pressure automatically adjusts with changes in load, reducing system heating and saving energy. All components are made of environmentally friendly components;
11. The imported internal meshing high-pressure gear pump is directly connected to the motor, with a compact structure, smooth operation, and noise level below 70dB;
12. Choose high-quality high-pressure hoses and fittings to ensure no leakage occurs;
13. The high-precision sensor used in the host has high comprehensive accuracy, high sensitivity, and good repeatability. After random calibration, the experiment is not affected by external forces, ensuring the accuracy of the experimental process and parameters. The force direction of the tension, compression and other test sensors is consistent. Calibration, simple and convenient;
14. Displacement measurement adopts high-precision linear photoelectric encoder;
15. The testing machine is equipped with a high-performance intelligent all digital controller, which adopts full digital PID regulation and is equipped with independent servo amplifiers, measurement and control software, and data acquisition and processing software. It can achieve multiple closed-loop control modes such as constant rate test force, constant rate cylinder displacement, and constant rate strain, and can achieve smooth switching between different control modes without disturbance;
16. It has a network interface that enables data networking and remote control functions;
17. Safety protection device: It has protection functions such as test force overload, over setting, power-off, and piston reaching the limit position.
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