LAW-B series electro hydraulic servo steel wire testing mach
Product Name：LAW-B series Computer controlled electro hydraulic servo steel wire testing machine
this series of products are mainly used in the mechanical properties of steel wire and other materials test.
Technical specification and scope of use
1. This series of products for the cylinder, double space frame structure, tension and compression spacing can automatically adjust the hydraulic automatic fixture, set the manual and automatic control. The control unit using the computer and electric hydraulic servo control system, with the stress, strain and displacement of three closed-loop control mode. The test data can be arbitrary access, and can realize data and curve analysis, local amplification and data editing, sample environment, test conditions, and can automatically calculate the material of the mechanical performance index, and print out the complete test reports and curves. The other is equipped with large gauge extensometer and steel strand special lengthening jaw, and ensure that the sample fracture.
2. this series of products fully meet the requirements of GB/T5224-2003< prestressed concrete with steel strand > and other standards.
B. The displacement measurement resolution of testing machine is 0.0025mm, which is used to measure and control the displacement of piston;
C. The deformation measurement resolution of testing machine is up to 0.00025mm, which is used to measure and control the deformation of the gauge of the sample;
D. using the independent development of digital servo valve as the control of the implementation of components, anti pollution ability, can achieve a long time no fault operation;
E. PID using control strategy to achieve constant speed test force, constant velocity strain, constant velocity displacement, constant velocity stress and other control modes, with human-computer interaction setting expert system control mode;
F. in order to manual, automatic two control test process, complete the test machine test data screen display, the user can according to their own needs to design the compound control mode of testing machine;
G. measurement and control system software can work under the Win7 operating system, using standard database management test data, and can provide network data interface,
H. a test, peak, the specimen deformation, piston displacement, test curve of the screen display function; real time display test curve, arbitrary choice coordinates of the display, such as: should stress-strain and load deformation and load displacement, load time, displacement time variable time - shaped, and can display the three curves simultaneously in a page, the curve can be magnified.
I. to determination of the tensile strength of steel strand, the specified non proportional extension strength, elastic modulus, elongation and other mechanical properties parameters, and accordingly the print results. According to the requirements of the print different contents of reports and curves. Using open excel report form, convenient user management; test the original record values, reported values according to the requirements of the standard GB/T228 rounding;
4. applicable standards and data processing:
A. users can customize the data processing software that meets the requirements of the national standard or other standards;
B. The test process can simulate the reproduction and re analysis of the test data.
Technical Parameters
| type specification | LAW－300B | LAW－600B | LAW－1000B | |
| Maximum testing force（kN） | 300 | 600 | 1000 | |
| Maximum allowable value of the relative error of indicating value | ±1% | |||
| Range of testing force measurement(kN) | 1%—100% | |||
|
Stress rate control range |
0.2%-5%FS/s |
|||
|
Displacement rate control range |
0.6㎜/min-60㎜/min |
|||
| Testing strain rate adjustment range |
0.00025/S-0.0025/S |
|||
|
Maximum tensile space(mm) |
1000 | 1000 | 1000 | |
| Maximum compression space(mm) | 600 | 600 | 520 | |
| Steel strand clamping diameter(mm) | 15.20mm（Other specifications will be equipped） | |||
| Two side strut spacing(mm) | 450 | 450 | 560 | |
| total power(kW) | 2 | 2.1 | 2.1 | |
| external dimensions (mm)(Length * width * height) | main engine | 940×630×3000 | 940×630×3000 | 920×610×3200 |
| Console desk | 1100×600×860 | |||
| net weight(kg) | 2200 | 2200 | 3100 | |