0.05-25mm/min Strand Wire Tensile Relaxation Testing Machine
0.2%-100%
Strand Wire Tensile Relaxation Testing Machine is composed by main frame, measuring control system, computer
system, function accessories, and so on. It is special for tensile property test and tensile stress relaxation
test for strand wire or pre-stress steel material. It is used for
determining the tensile property parameters, such as tensile
strength, stipulated non-proportional elongation intensity, max.
force, total elongation, and so on; stress relaxation property
parameters, such as stress relaxation speed ratio, relaxation
stress, relaxation ratio, and so on. The machine is with high
generality, dual-use machine. It can also be made into a special
stress relaxation testing machine according to customer’s request.
Main frame:
1-1. The main frame adopts the horizontal structure. The left and
right clamping plate and the four columns are connected to be a
force framework. There are motor, reduction box and screw on the
left of the frame. There is a wedge grip on one end of the screw,
and the other end is connected to the load sensor.
1-2. It adopts the AC variable frequency DC servo motor and driver.
The speed and frequency response is quick, speed regulation range
is wide.
1-3. It adopts the overtone reduction box for decelerating. It can
realize the seamless transmission by T type screw. It makes the
transmission stable, response speed quick. The force and
deformation control is without fluctuation.
1-4. There is no oil leakage and low noise (about 65db (A)) from
the traditional hydraulic transmission by adopting mechanical
transmission.
2. Measuring control system
2-1. The resolution ratios of force and deformation measurement are
high (24 bit), and stepless, constant resolution ratio, user can
set himself according to the test requirement.
2-2. The access frequency band width of sensor is 4.5Hz, the
measured test data and curve are true.
2-3. The load sensor is with high precision, and good stability in
long time.
2-4. The open data connecting interface can realize the closed loop
of load, deformation, displacement, speed, and so on. It controls
the constant load, constant deformation, constant displacement,
even stress speed ratio, even stress speed ratio, constant speed in
multiple step way. And realize the non-impact transform between the
after three in the test.
2-5. It has the function of automatic zero set and automatic
calibrating.
2-6. It has the protective function of over-load, over-stroke,
over-pressure, over-flow, over-heat, and so on.
2-7. The force access interface can convert the other type force
sensor, the software has the function of automatic identification.
The deformation access interface can also convert the other type
deformation sensor, the software has the function of automatic
identification.
3. Computer system
3-1. The computer system can communicate with the measuring control
system by the serial port. All the operations after controlled by
the computer, operated by the virtual keyboard on the WINDOWS
interface.
3-2. It can real-time acquire the test data, make the curve, zoom
in and out the curve partly, and print.
3-3. The test result can be store and read at will. The same group
test curve can be overlaid and contrasted, and then analysis to the
curve.
4. Function accessories
4-1 The special stress relaxation testing machine is only equipped
with cone self-lock type cylinder grip and grip install and
uninstall device.
4-2 The displacement sensor is with high measuring precision, good
stability, it can be used for tensile and stress relaxation test.
Main technical parameters:
| Capacity | 300KN |
| Measuring range | 0.2%-100% (same resolution in full range) |
| Loading accuracy | ±1% |
| Loading resolution | 0.05% FS |
| Loading speed | 0.05-50mm/min (can be set freely) |
| Initial loading method | automatic 70% or 80% breaking loading |
| Loading program | automatic constant-speed, automatic record after maintenance for 2
minute |
| Loading speed | 100-5000N/S (can be set freely) |
| Sample size | Φ15.20mm |
| Tensile stroke | 0-200mm |
| Total tensile distance | 800-1000mm (can be designed according to requirements) |
| Measuring range of displacement | 0.2%-100% |
| Displacement accuracy | 0.001mm |
| Structure of loading frame | horizontal loading frame |
| Power | AC 380V, 50Hz (servo motor with braking) |
| Overall dimensions | 2840x670x1060mm |
| Weight approx | 1200kg |
