The main unit of the microcomputer controlled toothless steel strand testing machine adopts a hydraulic cylinder bottom mounted main unit and a hydraulic bidirectional cylinder loading Reduced the overall height of the device. Mainly used for tensile, compressive, bending and other tests of metal, non-metal, and steel strands. Suitable for fields such as metallurgy, construction, light industry, aviation, aerospace, materials, universities, research institutions, etc. The experimental operation and data processing comply with the requirements of GB228.1-2021 "Metallic Tensile Test Method for Room Temperature Materials".
Its design, manufacturing, and inspection are based on relevant standards:
1)GB/T16826 "Electro hydraulic universal testing machine"
2)JJG139 "Tensile, Pressure and Universal Testing Machine"
3)GB/T5224 Steel Strands for Prestressed Concrete
4)GB/T228 "Tensile Test Method for Metallic Materials at Room Temperature"
Installation conditions for the testing machine
1) Installed on a stable workbench or a flat and sturdy ground;
2) Try to stay away from places with high air flow, such as doors and windows;
3) There is no obvious electromagnetic interference in the environment;
4) Prevent exposure to sunlight or getting close to air conditioning equipment, etc;
5) Environmental temperature: 20 ± 5 ℃ and fluctuation less than 2 ℃ per hour; Relative humidity: ≤ 80%;
6) Power frequency: 50Hz;
7) Power supply voltage: AC 380 ± 10V 50Hz power 3.0KW.
8) Users should pay special attention to the requirement that the power supply must have a grounding wire.Due to the grounding protection of the machine, if a grounded power supply is not used, there is a risk of injury in case of leakage.
9) Horizontal adjustment:Place the level on the testing machine platform and adjust the four adjustable feet below to make the testing machine's testing platform level. At this point, the host is already installed.
Core testing projects
1) Tensile performance testing: maximum force (tensile strength), specified plastic elongation strength (Rp0.2), elongation at break, etc.
2) Stress relaxation test: Simulate the stress loss of steel strands under long-term prestressing (equipped with a constant temperature chamber and load holding device).
3) Fatigue test (optional): Evaluate the durability of steel strands under cyclic loading (requiring a dynamic servo control system).
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