Spring Test Press NST

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?

Q Y The two forces which are influencing the derailing index

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

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

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

Leaf springs Axial stiffness Reference height

Vertical load cylinder Industrial PC with printer Hydraulic unit Front door

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

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

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

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

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

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

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

Force kN Stroke mm kN mm

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

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

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

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

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

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

Marking of the bowing

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

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

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

Metalastic spring testing

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

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

Special application Testing and height Adjustment of complete Primary suspension

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

Address: Nencki Ltd Gaswerkstrasse 27 4901 Langenthal Switzerland Tel. +41 62 919 93 93 Fax+41 62 919 93 90 www.nencki.ch/railway railway@nencki.ch