Universal Testing Machine

TECHNICAL SPECIFICATIONS OF THE 25KN

1.  Load Frame

•  Frame rated : 25kN in tension / Compression and 100Nm Torsion.
• Minimum stiffness 250 kN/mm, precision aligned load frame with fixed lower platen and adjustable upper crosshead.
• Column clearance:  400mm to 700mm.
• The top cross head movement is hydraulically operated using declamp cylinder to position it with different grips and specimen length before starting the test.
• Touch screen operated tablet for basic operations of the machine – switching the power pack On/Off, Clamp and De-Clamp of the top cross head, Moving the crosshead up and down, moving actuator up and down to mount the specimen.
•  Top crosshead must have provision to mount servo hydraulic actuator on it.

2. Fatigue rated actuator assembly

• Linear dynamic/static capacity: ±25kN.
• Minimum Stroke length: ± 25mm with resolution of 1μm
• Including anti-rotation assembly.
• Servo valves of suitable rating and accumulators of suitable capacity.
• Operating at 210 bar pressure.

3. Torsion actuator assembly

•  Capacity: Upto 100Nm.
• Rotation: 360° full rotation.

4. Axial Torsion Load Cell:

•  ± 25kN 100Nm Dynamic Capacity Axial Torsion Load Cell
•  Accuracy: ISO7500-1 Class 0.5 (0.5% of indicated load)
• 150% Safe over Load Capacity without mechanical damage
• 350 Ohm or higher resistance Strain Bridge design
• Fatigue Life: 10^9

5. Hydraulic Power Pack

•  Hydraulic power pack of sufficient capacity 10LPM to run the system continuously will be provide.
•  Proper size of accumulators will be incorporated to avoid jerks/pressure transients in the event of power failure.
• All safety provisions, pressure indicators, temperature indicators, relays will be incorporated.
• Hydraulic oil of sufficient quantity for the use of hydraulic power pack will be provide.
• Maximum working noise of 65 dB.
• System will be self-cooled, external cooling unit not accept.
• Variable frequency drive based control hardware to achieve energy efficient flow control.
• Touch screen based tablet is use for power pack operation.
• All the safety interlocks on the power pack to be monitored on the touch screen panel

6. Digital Servo Controller

• 2 channel of digital encoder input.
• Up to 8 channels of conditioned analog inputs with suitable signal conditioners
• 2 channel of load cell input
• channel of strain-bridge extensometer/crack-opening displacementgage input
• Spare Channels
• channel of digital servo-control with loop update frequency of the 6 kHz
• Digital I/O / Logic drive and sense lines.
• Synchronized data acquisition into host computer at 6 kHz.
• Channels of 32-bit digital encoder.
• Channels of 24-bit analog feedback.
• Channel of Set Point.
• Channels servo-output for monitoring
• 8 Bits of digital I/O status for time tagged device sense and control at 1kHz data acquisition rate.
• User settable software safety limit interlocks on upper and lower limit on each of 2+8 feedback channels with individual option of Stop/Hold/Trip
• Servo control of actuator with user settable/programmable.
• Mode control (Load, Stroke, Strain).
• Real-time automatic adaptive servo-gain adjustment to account for system stiffness variation as a function of specimen stiffness.
• Static ramping of Load / displacement/ strain with independently settable ramp rate.
• Cyclic loading with ramp/sine waveform and user settable mean, amplitude and phase at frequency of up to 50 Hz and restricted as per the actuator performance curve, with 2% accuracy in loading through adaptive control.
• Provision for multi-step static and cyclic loading, with provision to switch control mode.
• User settable error limit on servo-control with option of Stop/Trip.
• Host computer with Windows 11 or higher version of operating system and suitable application software for ease of performing tests under specified conditions with provision for report generation by way of multiple worksheet XL-tables including raw data arranged suitably as columns for individual channels.
• One Hardwired E-Stops, located on the frame for easy access.
• UPS to guarantee safe shut down and unloading in the event of power failure.
• OEM built software application for remote health monitoring must be available. For security purposes third party applications or screen sharing applications are not permitted. Same software must have provision to be upgraded for remote test monitoring with camera.

7. Grips and Accessories for Room Temperature Applications Tensile.

• Room temperature :25kN Hydraulic Wedge Grip.
• Load Capacity :25kN.
• The grips included wedge inserts for flat and round specimens.
• The flat wedges have provision to accommodate specimens of 0-10mm thickness and round specimens of diameter 3-9mm .
• Variable grip pressure based on the test samples: The variable grip pressure must be freely selectable by the user for optimum selection of gripping pressure for the same. Provision for the selection of gripping pressure via the remote control must also be there for safety.
• Axial Extensometer for Tensile Test Applications.
• Gauge length: 12.5 mm.
• Measuring range: +6.25/-3.1 mm.
• Accuracy: ± 0.5% as per ASTM E83
• Excitation: 5 to 10 VDC
•  Sensitivity: 2 to 4 mv/V
• Full bridge, 350 ohms strain gauged design.
• Compression Platens.
• Diameter 60mm platens with spherical seat for self alignment.
• Rated for room temperature operation.
• Room temperature 3 Point bend fixture.
• Load Capacity :25kN.
• Roller diameter :5mm.
• Bottom adjustable Span : 30mm – 150mm.
• Support blocks to meet ASTM D790.
• Tensile and Compression Testing Software (As per ASTM E8 and ASTM E9)
• Software to perform Tensile and Compression test. The user interface contains specimen description, loading parameters, pump controls, test run/stop, graph display, numeric readouts of multiple relevant test parameters.
• Tests can be done in stroke or strain control.
• Online graphs of stress vs. strain and load vs. displacement.
• Option to save the test profiles.
• Auto data acquisition settings.
• Option to view multiple test graphs in one plot.g. Option to run test in dual rate.
• Option to remove the extensometer and continue the test in stroke control.
• Option to stop the test after specified percentage load drop.
• Limit settings on stroke, strain and load channels.
• Offline post processing program to analyse the results in MS Excel.
• Basic Application Software.
• Performs Fatigue Test, Static or Monotonic test, Axial Torsion Test, Multistep programming and Time History (Custom Waveform) generation.
• Test can be done in Stroke, Load and COD/Extensometer control modes
• Display meters for current readouts, max-min readouts, peak valley readouts, set point and cycle counters. Display of time history graph and X-Y plots.
• Muti-channel option available.
• Option to program safety interlock for load, displacement and COD/Extensometer.
• Data recording collects time and/or peak-valley data to binary formats. Data is then exported to MS Excel/text format where report generation and graphs are available with play back option.
• Data reduction options available in real time data logging and also during data exporting.
• Application must allow for testing in axial torsion mode
• Software must be upgradable with module for testing Biomedical implants with preset tests to various ASTM standards like ASTM F1717, ASTM F543, ISO 7206-4 etc.
• Host computer system – Test work station.
• Display: 24 inch LCD monitor
• Processor: Intel Core i5.
• RAM: 16GB DDR4 non-ECC Memory.
• Storage: 3.5 inch 500 GB SSD
• Drive: 8x DVD+/-RW 9.5mm Optical Disk Drive
• Operating System: Windows 10 Pro English
• Wired Mouse and Keyboard.
• 3000 VA with 30mons battery backup