The electric hydraulic servo fatigue testing machine for power fittings can complete mechanical tests for various types of power fittings, such as mechanical damage load and failure load tests for connecting fittings, mechanical load tests and grip strength tests for suspension clamps and tension clamps, tensile tests and slip tests for contact fittings, turning angle tests and fatigue tests for suspension clamps, etc. Adding a special auxiliary testing machine can also perform shear tests: the main machine is a four column frame structure with a servo actuator mounted structure. Forced hydraulic clamps are installed on the top of the crossbeam and actuator piston rod respectively. The adjustment of the host crossbeam adopts a hydraulic lifting, hydraulic clamping, and elastic release structure to ensure the stability and reliability of the crossbeam during the test process, while also ensuring that the crossbeam remains locked and immovable in non test states. The outer surface of the column is treated with electroplated hard chromium, which can effectively increase the column's wear resistance, improve its corrosion resistance, and increase the aesthetic appearance of the host. The mainframe of the testing machine has the characteristics of compact structure, flexible lifting and lowering of the crossbeam, high frame stiffness, reliable specimen clamping, good centering, and convenient clamping. It can also be equipped with various fixtures and environmental testing devices to expand the testing function.
A closed-loop servo control system composed of an electrical controller, servo valve, load sensor, displacement sensor, extensometer, and computer can automatically and accurately control the testing process, and automatically measure test parameters such as force, displacement, and deformation. The testing machine can achieve waveforms such as sine waves, triangular waves, and square waves, and can perform mechanical tests such as tension, compression, bending, low cycle, and high cycle fatigue. Environmental testing equipment can also be configured to complete environmental simulation tests at different temperatures.
The testing machine is flexible and convenient to operate, and the lifting, locking, and specimen clamping of the moving crossbeam are all completed by button operation. It adopts advanced hydraulic servo drive technology for loading, high-precision dynamic load sensors, and high-resolution magnetostrictive displacement sensors to measure the force and displacement of the specimen. The fully digital measurement and control system realizes PID control of force, deformation, and displacement, with smooth conversion between each control. The test software works in the Windows Chinese environment, with powerful data processing functions. The test conditions and results are automatically saved, displayed, and printed. The entire experimental process is controlled by computers, and the testing machine is an ideal cost-effective testing system for industries such as research institutes, metallurgical construction, national defense and military industry, colleges and universities, mechanical manufacturing, transportation, etc.
The testing machine can perform dynamic high and low cycle fatigue tests, program-controlled fatigue tests, as well as static tests under constant rate, constant strain, constant stress control, and various conventional mechanical performance tests.
reference standard
1) GB/T 2611 General Technical Requirements for Testing Machines
2) GB/T16825.1 "Inspection of static uniaxial testing machines - Part 1: Inspection and calibration of force measuring systems for tensile and/or compressive testing machines"
3) GB/T 16826 "Electro hydraulic Servo Universal Testing Machine"
4) JB/T 8612 "Electro hydraulic Servo Universal Testing Machine"
5) JB9397 Technical Conditions for Tensile and Compressive Fatigue Testing Machine
6) GB/T 3075 "Metallic Axial Fatigue Test Method"
7) GB/T15248 "Axial constant amplitude low cycle fatigue test method for metallic materials"
8) GB/T2317.1 "Test methods for electrical fittings - Part 1: Mechanical tests"
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