一． Main technical index:
Main function and characteristics:
1. The machine adopts computer controlled high precision hydraulic servo valve to drive precision hydrocylinder. It realizes automatic control of many modes in the same rate test force, displacement and deformation to fulfill the tests of tension, compression, bending resistant to specimen and according with the requirments of the standard of GB/T228-2002 about tension test methods of metallic material at room temperature. If added with fittings, it can realize the measurement of tensile strength, ultimate tensile value of concrete material.
2. The mainframe of machine adopts hydrocylinder underneath type, the upper and lower jaw bases are open structure to simply clamp specimen.
3. Hydraulic servo loading system, and imported with original packaging hydraulic pump and hydraulic valve, high precision broadband hydraulic servo valve to ensure high precision, high efficiency, low noise, quick response and realize automatic control to test.
4. computer control and processing system:
a. it can finish set of test parameter, automatic control of test data acquisition, processing, analysis, storage and display(test data include: upper and lower yield point, tensile strength, breaking strength, modulus of elasticity, extensibility of every point, non-proportion elogation,etc.)
b. It has the function of screen display of test force, peak value, specimen deformation, piston displacement, test curve. Keyboard input operation and control mode intelligent set expert system and realizes arbitrary set of control scheme and smooth switch of various control mode.
c. On the basis of test soft of windowsXP operate system, it can finish data automatic acquisition and processing according with the requirements of the standard of GB228-2002 about tension test methods of metallic material at room temperature. It has the function of simulation and reproduction, reanalysis to test data, magnification of test curve, comparison, traversing. The test curve can arbitrarily choose coordinate axis, and enlargement and reduction.
d. It has many graphics display windows and unit conversion function. Database management and and can have network communication and management.
e. The machine has function of and extension and updating.
f. It has strong self-check function.
5. protection function:
a. limit protection to oil cylinder.
b. Overloading overflowing protection of hydraulic system.
c. Overloading protection of test force.
d. Overcurrent, overpressure protection.
e. Protection of specimen breakage.
f. Automatic protection when offtest.
二． Main technical index:
1. Max. test force: 1000/600/300KN.
2.Test range and precision of test force: precision: better than ±1% (from 20% of full range of every gear), is equivalent to:2-100% FS.
3.Test range of precision of deformation: there are four gears: first, second, fifth, tenth gear. Better than ±0.5%FS.
4. Test range and precision of displacement: 200mm, better than 0.01mm.
5. Max. distance between tensile jaws (piston travel is included): 600
6. Max. distance between upper and lower platens: 470
7. Clamping diameter of round specimen: Φ13～Φ60
8. Clamping width and thickness of flat specimen: 0-40mm
9. Sizes of upper and lower platens: 204mm×204mm
10. Distance between bending test bearings: 100-1000mm
11. Max. travel of piston: 200
12. Tensile speed: 0.5-60mm/min.
13. Regulating speed of test space: 120mm/min.
14. Dimension of main body
(length*width*height the travel of piston is included mm): 1100mm x 960mm x 2260mm
15. size of control console (length*width*height mm): 700*800*1400
16. size of hydraulic power source (length*width*height mm): 500*500*700
17.technical parameter of control part:
|(1) test force measurement display part: high precision oil pressure transducer to measure test force.
(2) deformation measurement display part: high precision extensometer to measure specimen deformation.
(3)displacement measurement display part: high precision photoelectric encoder to measure displacement of piston.
(4) automatic control part: microcomputer control.
a. piston travel control in the same rate:
set range of the same rate: 0.5-60mm/min
control range: piston is on “zero”—- max. point of piston travel
b. test force control in the same rate:
set range of speed: 0.1-2.0% of the full range.
Control range: 5-100% of the full range.
c. strain control in the same rate:
set range of speed: 0.1-50mm/min
control range: 5-100% of the full extension range.
The full extension range: 0.1-100mm
d. automatic tension test control of metallic material:
strain rate control: 1-50MPa/sec
piston travel control in the same rate: 0.5-60mm/min
The machine will automatically stop once specimen break.
三．The setting means of testing condition:
Man-machine communication: microcomputer typing. |
