The testing of wires is used to analyse their mechanical properties and ensure their quality. Important test methods include the tensile test, the torsion test and the bending test.
In the tensile test, the wire is subjected to an axial tensile force to determine its tensile strength and ductility. This method helps to analyse the load limits and the breaking behaviour of the wire.
The bending fatigue test tests the flexibility and fatigue strength of the wire by repeatedly bending it. This test provides information about the fatigue strength and the ability of the wire to withstand repeated bending cycles.
The torsion test checks the torsional strength by twisting the wire until it breaks. This test is particularly important to evaluate the torsional strength and behaviour under torsional load.
Hegewald & Peschke offers various testing machines, including testing software, for wire testing. The testing technology can be used to ensure that wires fulfil the required standards for various industrial applications (e.g. in the electronics or construction industry).
Universal testing machines for tensile tests on wires
- Tensile test on metallic materials according to EN ISO 6892-1
- Determination of elongation at break and tensile strength according to EN 60851-3 (IEC 60851-3)
Depending on the diameter, material and the tendency of the wires to break at the clamps, the use of special clamping tools is required for reliable clamping.
Due to the long design of the clamping jaws, the clamping force is introduced softly into the specimen, thereby reducing the notch effect at the end of the clamping surface. Particularly with specimens that do not have a cross-section reduction between the clamping area and the test cross-section, the fracture position is otherwise much more frequently located directly at the clamping jaw.
Further information about tensile testing machines for tensile tests on wire ropes
Further information about specimen grips for universal testing machines
- Perfect for static tensile tests on tensile strands according to ISO 15630-3 /ASTM A416 / ASTM A1061
- 2-camera video extensometer system for determining the modulus of elasticity and elongation at break
- Measurement of yield strength according to ASTM A1061
- Specimen break always within the strain measurement range
- No artificial specimen marking required
- Also suitable for twisted tensioning wires
- Digital image correlation enables:
- Determination of local strains (location and direction resolved)
- Creation of colour-coded area maps for visualisation of strain distribution
Bending Fatigue Testing Maschine 180° for wire specimens according to DIN 51211 and ISO 7801
The wire samples are of a defined length. They are bent with a 90° angle to the left and to the right. The angle deviates by max. ± 3°. The lower end of the wire is clamped into a screw terminal and guided through a pair of bending rolls. The bending rolls are made of special hardened material to allow the testing of wires up to 2,000MPa. The rolls ensure defined bending depending on the wire diameter. The bending rolls can be exchanged. The upper end of the wire is clamped into a movable, servomotor-driven bending arm. The testing facility is adjustable according to the standard indicated above. The test station allows the simultaneous testing of upt to 3 specimen depending on the wire diameter. Accordingly the test time can be reduced dramatically.
Advantages:
- high torsional stiffness and high angular resolution
- electrical overload protection
- variable testing speed
- maintenance-free AC servo drive with a planetary gear set free of play
- operation with customary PC and material testing software LabMaster
- protection of the operating staff by a coverage of the workroom with an electromagnetic locking
Various models of torsion tester are available with a maximum torque of between 200 Nm and 5000 Nm.
Advantages:
- Compact complete system
- Fixed work table with integrated control unit
- Robust industrial control
→ Automatic breakage detection by the control system
→ Indirect torque measurement via motor power
- User-friendly operation via touch panel
- Simple test configuration
- Interactive user guidance based on the standard-based test sequence
- Fast test execution based on templates
- Export of test results as CSV
- Industrial safety standard
- Safety door electrically closed and interlocked (PLd)
- Safe stop (STO) with open safety door
- Pneumatic pressure release (PLc)
- Easy clamping of the wire specimens with optimized specimen holders
- Simple adjustment of the clamping length via scaling in the machine bed
Our test systems are equipped with the LabMaster test software, which enables user-friendly setup and procession of the test procedures for customised tests. It guarantees fast and reliable determination of results and offers a high degree of flexibility when integrating external measuring devices. Data import and export for customised software such as QDAS or SAP is also possible.
Contact:
Hegewald & Peschke
Meß- und Prüftechnik GmbH
Am Gründchen 1
01683 Nossen
Phone: +49 35242 445-0
Fax: +49 35242 445-111
E-Mail: info@hegewald-peschke.de
Internet: www.hegewald-peschke.com
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