Determination of the bending strength of glass - Test with specimen
supported at two points (four point bending)
Product description:
The testing machine incorporate the following features:
a) The stressing of the specimen can be capable of being applied
from zero up to amaximum value in a manner which minimizes shock
and is stepless.
b) The stressing device is capable of the specified rate of
stressing
c) The testing machine incorporate a load measuring device with a
limit of error of ＜1.0 % within the measuring range
d) The supporting rollers and the bending rollers have a diameterof
50 mm and a length of not less than 365 mm. All the rollers can be
free to rotate.
Equipped with the computer & Software & printer, it can display,
record, process and print the test results, and control test
procedures as the set program and can draw test curves
automatically in real time. The PC controlling system can also
realize the close-loop control of the parameters such as loading
force, specimen deformation, and crosshead stroke earameters can be
automatically found according to GB, JIS, ASTM, DIN, ISO and other
standards.ith the ord, process and print the test results, and
control test procedures as the set program and can draw test curves
automatically in real time. The PC controlling system can also
realize the close-loop control of the parameters such as loading
force, specimen deformation, and crosshead stroke etc. They are
essential testing instrument for quality testing section,
university and colleges, research institution and industrial and
mining enterprise.
The key technical indexes:
| Force capacity selectio | 50kN |
| Force measurement accuracy | 0.5% |
| The displacement resolution | 0.005mm |
| Control mode | Closed-loop |
| Force resolution | 1/300,000 |
| Test speed | 0.005~500mm / min can be formulated |
| Conpression test trip | 900mm(can customized) |
| Speciment length | 1100mm±5mm |
| Speciment width | 360±5mm |
| Accurancy of deformation measure | 0.01mm |
| Test width | 520mm |
| External size | 760×500×2100mm |
| Instruments weight | about 550kg |
Mounting of the test speciment
Safety Device:
| Stroke protection | Machinery, computer double protection, prevent over preset |
| Force protection | system setting |
| Emergency stop device | Handling emergencies |
