WDSC-300 microcomputer control steel strand relaxation test machine

WDSC-300kN microcomputer controlled steel strand relaxation tester

1. Executive Standard

GB / T5224-2003 "Steel Strand for Prestressed Concrete"

GB / T10120-1996 "Metal Stress Relaxation Test Method"

2. Main functions and features of the product

1. The testing machine adopts a vertical structure. The upper crossbeam forms a tensile test space with a double column and a work table. The power transmission mechanism (composed of an AC servo speed regulating motor, a reducer, and a screw pair) is installed below the work table. The upward and downward movement of the loading screw drives the movement of the lower jaw to realize the loading of the sample; the load cell is installed on the upper beam and connected with the upper jaw. The testing machine has a high rigidity to ensure the accuracy of the testing machine results;

2. Using industrial control computer, high anti-interference performance, suitable for long-term work.

3. Based on Windows98 / Windows2000 / Windows XP platform special computer software, fully drawing on the advanced experience of similar foreign products, according to national standards GB / T5224-2003 "Steel Strand for Prestressed Concrete", GB / T10120-1996 "Metal Stress Relaxation" The relevant requirements of "Test Method" are designed with perfect functions:

(1) There are standard test procedures, press the shortcut key, the test system can load the steel strand to 70% or 80% of the breaking load within 5 minutes according to the standard requirements, and keep recording the test data automatically within 2 minutes. When the set time is reached, the test is automatically terminated.
(2) The correlation coefficient between the test curve and the theoretical fitting curve is more than 99%, so the 72-hour test data can be used to estimate the 1000-hour relaxation rate, which shortens the actual test time.
4. The testing machine adopts a special sensor for steel strands, which has a strong ability to resist relaxation and creep. The zero point drift of the force for a long time, the sensitivity coefficient can be guaranteed within the allowable range.
5. The steel strand anchor adopts special materials and special technology, with long service life and reliable clamping.
3. Main technical indicators:
1. Rated test force: 300kN
2. Measuring range of test force: 6-300kN
3. Test force accuracy: better than ± 1%
4. Resolution of test force: 0.05% / FS
5. Speed ​​adjustment range: 0—50mm / min
6. Initial load application method: Automatically apply 70% breaking load or 80% breaking load
7. Loading procedure: Automatic loading at a constant speed, automatic recording after 2 minutes
8. Loading speed: 100-5000N / S arbitrary setting
9. Sample specifications (nominal diameter mm): Φ9.50
Φ11.10
Φ12.70
Φ15.20
10. Stroke of tensile test: 0-200mm
11. Nominal total length of drawing: 800-1000mm
13. Displacement resolution: 0.01mm
14. Deformation measurement resolution: 0.001mm
15. Protection function: Automatic shutdown when the maximum test force exceeds 2% -5%.
17. The main form of the testing machine: vertical double-column structure
18. Power: AC220V50Hz / 3.0KW
19. Host size (length X width X height): 900x920x2900mm