Information on the most widely used ASTM standards within the materials testing industry
Model: HDS, 500KN/1000KN
Computer Control Concrete Sleeper Flexure Testing Machine for concrete
rail pillows (Type III pillows, fork pillows, bridge pillows, wide rail
pillows, etc.) anti-crack degree (bending) test, accurate and fast
detection of the strength of various rail pillows, and test the actual
carrying capacity of rail pillows. and anti-fatigue capability at
different frequency loads. This mobile static design, dynamic test and
static test without any hardware changes only need to open different
software (to meet static test, oil road using double-valve in-line,
fatigue test, two servo valves working at the same time, to meet the
requirements of dynamic high flow, static experiments, all the way servo
valve work, to meet the static experiment control accuracy
requirements. This not only meets the customer's testing requirements,
but also saves the customer the cost of a device. )
Static And
Dynamic Rail Sleeper Test Machine mainframe is a frame structure, which
is stronger, more stable and more scalable than the four columns, and
the bending fatigue test of the rail pillow can be realized with the
corresponding components. Complete protective device to ensure that the
test sample breaks without foreign splashes during the test.
General introduction
Test process:
rail pillow →medge trolley→ pushed to the test machine →position ruler to adjust the position of the rail pillow→ load center and pressure plate center re-match, set the test procedure, piston rapid → The speed is close to → at the set load speed, constant loading →loading time→ unloading returns to the specified position, (or reloading to crack the rail pillow) to complete the test of the three load surfaces of the rail pillow.
Related test items:
1, Static bending strength test for track pillow;
2, track pillow dynamic fatigue test;
3, track pillow assembly durability test (including elastic pads, bullet strips, locking bolts, etc.);
4, Elastic pad movement stiffness test;
5, Elastic pad horizontal friction test (horizontal loading device and measuring system need to be added).
Key Features
The servo linear actuator is the core component of the testing machine, and the testing machine outputs test forces through the actuator. It is designed and manufactured using proprietary technology, with the actuator embedded in the lower part of the host machine, comprising the actuator body, hydraulic control module, and sensors.
1, The actuator uses our company's servo linear actuator, designed based
on the principle of a symmetric four-way servo valve controlling a
symmetric actuator. The actuator is designed and manufactured with a
modular, standardized development concept, utilizing a multi-stage
flexible support combination guiding mechanism, characterized by low
damping, high responsiveness, long lifespan, and large clearance design.
The startup pressure is less than 0.05 MPa, and there is no crawling
phenomenon.
2, The piston seal of the actuator adopts a Glide
ring guide and seal method, while the piston rod seal uses a Star seal
guide and dust seal method. All sealing components are imported
high-speed sealing elements specifically for servo actuators from
Germany's Busak Shamban. The support of the piston rod of the servo
linear actuator breaks from traditional design, using non-metal support,
large clearance design, and high lateral force resistance, featuring
high speed and non-sintering self-lubrication. The assembly achieves no
oil leakage with combined seals for high-pressure sealing, low-pressure
sealing, and leakage through clearance pipes. The combined sealing
structure has good interchangeability, facilitating maintenance. It
exhibits high speed, non-sintering, and self-lubricating
characteristics. The above sealing methods effectively reduce the
internal frictional resistance of the actuator, improving the testing
accuracy of the machine and the lifespan of the actuator. The frequency
response of the servo linear actuator is not less than 100 Hz.
1, Fatigue working life study;
2, Cracking extension and breaking load study;
3, Tensile, compression, bending cyclic test;
4, Components and parts fatigue and life working test.
Closed-loop control with seamless switching between load, displacement, and strain control modes
Frequency range: 0.01-50Hz (standard), with high-end models reaching 200Hz.
Position control accuracy: ±0.01mm.
Force control precision: ±0.5% of full scale.
Sinusoidal, triangular, and square wave loading patterns.
The space height is adjustable to meet different sample compression and bending tests
The loading position is adjustable to meet different test types.
The span position is adjustable and the stick can be replaced.

Real-time plotting of force-displacement, force-cycle curves
Automatic calculation of fatigue life, S-N curves, and other key parameters
Data storage capacity for 10,000+ test cycles with 0.1ms sampling intervals
Report generation in multiple formats (PDF, Excel, Word) with customizable templates.
Heavy-duty welded frame with stress-relief treatment
Horizontal/vertical configuration options for different testing requirements
Temperature compensation system to maintain accuracy during extended testing
Safety enclosure with interlocks to protect operators during high-load testing.
Main technical specification
5.1. Maximum dynamic test force: 500kN;
5.2. Maximum static test force: 400kn
5.3. Test force measurement range: 1%-100%F.S
5.4. Test force measurement accuracy: 1% of the ± value;
5.5. Mover travel: 200mm;
5.6. Resolution (mm): 0.002
5.7. Displacement measurement accuracy: better than ± 0.5% Fs; Deformation measurement resolution (mm): 0.001 (deformation),
5.8. Deformation measurement: LVDT (differential transformer);
5.9. Deformation measurement range (mm): 0 to 25
5.10.Test adjustment space (mm): 0 to 1500mm;
5.11. Test maximum space: 600mm;
5.12. Upper roller size: 50mm diameter
5.13. Lower roller size: 50mm diameter
5.14, Effective width: 1000mm;
5.15 form factor: 3000x1800x2400
5.16 bare metal weight: about 5500kg
5.17. Static isostable displacement control range: 0.5 mm /min to 100 mm /min;
5.18. Dynamic control frequency: 0.01-30hz
5.19. Maximum frequency corresponding amplitude: ± 1.5mm
5.20. System pressure: 21mpa
5.21. System traffic: 110L
5.22. Control mode and data processing: computer servo control system and data (test force, displacement) graphics acquisition and processing;
5.23. Force measurement method: high-precision spoke sensor measurement;
5.24. Supply voltage: 380V, 50HZ, three phase.
5.25. T slot size: Suitable for M30T bolts
Main accessories (Standard delivery with machine)
| High Stiffness Frame | 1 set |
| Constant pressure servo oil source | 1 set |
| Hydraulic clamper | 1 set |
| Servo controller | 1 set |
| Fluid part connection | 1 set |
| Accessories | 1 set |
| Consumable parts | 1 set |
| Computer | 1 set |
| Printer | 1 set |
| Documents (Manual, packing list, certificate) | |
Advantages
1 Superior Testing Precision
Eliminates human error through fully automated testing processes
Consistent results with coefficient of variation (COV) typically <1%
Capable of detecting minute changes in strand behavior during fatigue progression
2 Increased Testing Efficiency
Reduces testing time by 50% compared to traditional methods
Can perform 2 million cycles (standard fatigue test) in approximately 28 hours
Automatic cycle counting with target completion shutdown
Parallel testing capability on some models for multiple specimens
3 Versatile Testing Capabilities
Performs not only fatigue tests but also static tensile, creep, and relaxation tests
Adapts to various standards (ISO, ASTM, GB/T) with simple software configuration
Test different strand types: low-relaxation, stress-relieved, galvanized, and composite strands
4 Long-term Reliability
Industrial-grade components with MTBF (mean time between failures) >10,000 hours
Low maintenance design with easily accessible hydraulic filters and seals
Energy-efficient operation (some models consume 70% less power than older designs)
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