1. Spring Test Press NST

2. Why Spring Testing is important?
Which springs and criteria can be tested?
Main components of the Nencki spring test press
Mechanical components
Hard- and software
Why transversal tests are so important?
Metallastic spring testing
Leaf spring testing
Why the Nencki spring test press is the best solution for you?

3. Q Y
The two forces which are influencing the derailing index

4. What is measured with the spring test press NST?Q Y
Axial stiffness
Transversal stiffness

5. Helicoil springs Test features: Axial stiffness Reference length
Force/deflection diagram
Bowing angle (free transversal deflection)
Bowing direction
Bowing force
Transversal stiffness

6. Metalastic and conical springs
Test features:
Axial stiffness
Reference length
Force/deflection diagram

7. Leaf springs
Axial stiffness
Reference height

8. Vertical load cylinder
Industrial PC
with printer
Hydraulic unit
Front door

9. Vertical load cylinder
Rigid 2-column guide
Axial load cells
Top format part
Bottom format part
Transversal load cell
Compound table for transversal test
Extended guides to withdraw the compound table to allow loading by crane

10. Micro filter
Proportional valves
overload valve
Oil cooler
Oil level and temp. control

11. Stroke measuring system
integrated in hydraulic cylinder
Load cells
- 3 cells for axial load measuring
- OIML precision class 3
- Total nominal load 300 kN

12. Compound table
with integrated movement
measuring in X and Y
Precise linear guides
Hydraulic cylinder
For transversal stiffness test
Transversal load cell
for measuring of the transversal force /stiffness

13. Heavy springs can be loaded by crane onto the extendable compound table

14. Bottom format part Top format part
1 format part for 2 different springs
Spring A centered on outer diameter
Spring B centered on inner diameter

15. Industrial computer
The fastest version available
17“ touch screen
All software basing on Windows XP technology
Lockable
A4 Laser printer
USV

16. Force kN
Stroke mm kN mm

17. The control centre of the
machine
Visualisation of transversal
measuring values
Bowing direction and angle

18. Data bases
Springs with parameters
programs
Easy programing
Thanks to integrated
program editor you
can crate easily and
fast new programs

19. A4 report printer
Included in our scope of supply
Report editor
With a few mouse clicks
you can create a new design

20. Transversal tests: Why?
Each helicoil spring does
bow side-wards under load
application

21. Transversal tests: Why?
In this example the springs are
bowing under load all towards the same bogie side. Q Y
Very bad influence regarding the derailing index

22. PC controlled
All test parameters and test result are stored, report can be printed

23. Marking of the bowing

24. In this example the bowing of the springs has been measured.
Springs with similar characteristics are matched, so that lateral
forces are neutralized

25. x
In this example the lateral movement of the springs influences
the axle distance.
The bogie will have the tendency to drive to the left side.
Bad running characteristics -> noise, vibrations, wear -> costs

26. Transversal spring helps:
To improve the running characteristics
To reduce the derailing risk
To reduce vibrations
To reduce noise
To control the quality of your spring supplier
To reduce life cycle costs of wheels and rails
Transversal spring test is a must for:
High speed trains
Metros

27. Metalastic spring testing

28. Testing of leaf springs
Load application cylinder
with load measuring cell and vertical stroke measuring
Spring guiding table
Fixing bolt
Linear bearing guide

29. What can be tested with the machine?
Vertical load
Vertical stroke
Stiffness vertical
Hysteresis

30. Special application Testing and height Adjustment of complete
Primary suspension

31. Made for railway applications
Fully computer controlled
Ergonomic working conditions
Robust design

32. Address: Nencki Ltd Gaswerkstrasse 27 4901 Langenthal Switzerland
Tel
Fax