Torsion testing with servo hydraulic test facility

Component testing and torsion testing

  • Testing of individual components from machines, equipment, and vehicles
  • Torsional and linear load tests
  • Flexibly adaptable test bench design
  • Possibility of multiaxial loads
  • Flexible adaptation of the test bench control
  • Flexible measurement data acquisition of up to 32 channels
  • Extensive choice of state-of-the-art measurement technology
  • Possible installation of strain gauge measurement points

Components subjected to torsional stress are exposed to heavy strain day in and day out. To withstand this strain, durability (endurance) and breaking load can be tested in the early stages of vehicle development at the ATESTEO torsion test benches. Depending on the kind of torsion test bench, the parameters torque, angle of rotation, and frequency of vehicle components and other industrial components are measured.

At ATESTEO, component testing can be conducted on two different types of torsion test bench, depending on customer requirements. The servo hydraulic torsion test bench for torsional loads can also generate less torque owing to its advantageous drive, allowing higher angels of rotation to be tested. The servo hydraulic torsion test bench for linear loads permits testing of smaller angles of rotation owing to its high torque.

Component testing on the torsion test bench

On the torsion test bench, a wide variety of components can be tested for their torsional load. Whether for automobile manufacturers, developers of transmissions and other vehicle components, or manufacturers of components for various industries — our servo hydraulic torsion test benches can be used as you like for many customer requirements.

Component testing for vehicle on torsion test bench:

  • Clutch plates, clutch discs
  • Dual mass flywheels
  • Drive shafts, ball-and-socket joints
  • Cardan shafts, Cardan joints, universal joints
  • Hubs
  • Crankshafts
  • Transmission shafts, gearbox shafts, gear shafts
  • Differentials, differential gears
  • Flex discs, giubos
  • Transmission housings, gearbox housings
  • Stabilizers, anti-roll bars

Torsion testing of additional components:

  • Any shafts and axles
  • Tubes and pipes
  • Spindles
  • Torsion bars
  • Clutches
  • Threaded drives
  • Gear teeth
  • Flanges
  • Mounting and fixing elements

Performance characteristics of the ATESTEO torsion test

Torsional actuator

  • Static torsional moment (torque): 10,000 Nm
  • Dynamic torsional moment (torque): 8,000 Nm
  • Frequency range: 0 – 50 Hz
  • Minimum load rise time: 0.009 s/kNm
  • Maximum angle of rotation: + 50°C

Angle sensor

  • Manufacturer: Wachendorff
  • Operating principle: incremental transducer (transmitter)
  • Measuring range: + 110°
  • Resolution: 0.01 °

Torque measuring shaft

  • Manufacturer: Hottinger Baldwin Messtechnik
  • Operating principle: strain gauges
  • Measuring range: + 10,000 Nm
  • Linearity deviation: 0.02 %

Temperature measuring point

  • Manufacturer: Optris GmbH
  • Operating principle: contactless over infrared
  • Measuring range: -50°C to +900°C
  • System accuracy: ±0.1 % or ± 1°C

Control / recording of measurement values

  • Type of control: digital
  • Function (waveform) generator: sine, sawtooth, rectangular, or triangular
  • Signal processing: two AC channels and two DC channels
  • Measurement value acquisition: PC with analogue devices card RTI-815F
  • Measurement points (standard): torsional moment (torque)/angle of torsion, two temperatures
  • Measurement points (additional): expandable up to 32 channels, e.g., strain gauges

Servo hydraulic torsion testing according to your requirements

Torsional loads

The servohydraulic torsion test bench from ATESTEO permits accurate, this energy-efficient, testing of industrial components and components from vehicles. The servohydraulics create a variable speed system that permits low rotational speeds in addition to higher ones. The hydraulic supply of the torsion test bench is provided by a 91 litre/minute pump unit with 280 bar operating pressure and an upstream conditioning unit with two pressure accumulators. The servohydraulic torsion test bench from ATESTEO is additionally equipped with a Roell Amsler K7500 digital control system for servo drives.

Linear loads

The servohydraulic one- or co-channel linear test bench from ATESTEO is used for special customer requirements — especially when it comes to testing tasks with a high torque of up to 20 kNm. It has a freely programmable PDES test bench control system for automated operation of the torsion test bench. The hydraulic supply is provided by a 4 litre/minute pump unit with 280 bar operating pressure and a pressure accumulator. Through extension with a torsion device, static and quasi-static torsion tests up to a torque of 20 kNm can be carried out.

Contact

Do you have questions about torsion testing at ATESTEO or would you like to test your components with us? We are looking forward to your inquiry.

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Test set-ups on the torsion test bench

Fatigue test of a drive shaft

  • Fatigue test on a coaxially tensioned drive shaft
  • 300,000 cycles / 2Hz /± 1,296 Nm
  • Data acquisition (recording) of angle of rotation and torque (10 kNm torque measuring shaft)

Friction testing of a dual mass flywheel

  • Friction testing of a dual mass flywheel with overlapped axial load (clutch actuation)
  • Additional capturing and recording of torque (50 Nm measuring shaft) and axial force

Fatigue strength testing of an articulation

  • Strength testing of a drive shaft mounted (clamped) under articulation (10°/40°)
  • Dynamically surging application of a load to specified torques, finally to fracture
  • Data acquisition of angle of rotation and of torque (10 kNm measurement shaft)

Characteristic curves of a clutch disc

  • Determination of the characteristic curves of the pre-dampers and main damper springs of a clutch disc
  • Mounting through clamping the friction lining
  • Data acquisition (recording) of the rotational angle and torque through an additional 50 Nm/500 Nm measurement shaft

Characteristic curves of a dual mass flywheel

  • Determination of the characteristic curves of the pre-dampers and main damper springs of a dual mass flywheel
  • Dynamically surging application of a load to specified torques, finally to fracture
  • Data acquisition (recording) of rotational angle and torque (10 kNm measuring shaft)

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