DESCRIPTION
Marposs NVH G-EAR tester, that works on the Single Flank testing principle of one master gear meshing with the component under inspection, is able to detect macro-geometry (nicks, runout etc.) and micro-geometry (gear mesh excitation, ghost orders) defects that are responsible of gear whine and noise phenomena.
The ability of achieving high values of torque and rotational speed and the possibility to adjust them at will during testing, is one of the major benefits of the application, which guarantees a great level of correlation with the End Of Line test unit.
A robust granite base frame to become non-sensitive to external interferences and disturbances and a highly configurable software make Marposs NVH gear tester at the forefront of technology in the sector, capable of performing accurate Single Flank and NVH analyses.
The output parameter is the angular acceleration (rad/s2) evaluated instantaneously and in the long run. The signal of the sensor is broken down into its frequency components. The final elaboration reports the amplitude values of each frequency component = FFT Spectrum.
The spectrum normally shows a range of frequencies related to the gear meshing frequencies and relevant sidebands, whose amplitude is usually related to the transmitted load. Unexpected high amplitudes are related to ripples and are defined as ghost orders.
BENEFITS
CHALLENGING TESTING CONDITIONS
The machine has the capability to measure gears at highly demanding testing conditions. As a matter of fact, the system offers the possibility to set the operating conditions in the range 0-2000 rpm (rotational speed) and 0-25 Nm (torque).
WIDE OPERATIONAL RANGE
The system has the capability to measure gears and shafts with maximum part length 400 mm and maximum diameter 250 mm, offering to our customers the opportunity to accommodate in one single piece of equipment the regular gear production range.
ADAPTABILITY TO PROCESS NEEDS
Design protect for both manual and automatic (in-line) part loading.
QUICK CYCLE TIME
A very quick cycle time, in the range of 20-30 seconds, is perfect for in-line 100% check integration.
INSENSITIVE TO EXTERNAL VIBRATIONS
A granite base frame allows to insulate the machine from environment and other external disturbances.
HIGH LEVEL OF ACCURACY
Noise data are consistent with End of Line test rigs and analytical laboratory inspection.
TECH SPECS
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Parameter
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Value
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Motor Nominal Power
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5.7 kW
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Power Supply
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50 Hz – 400 V (3+N)
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Machine Footprint
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1900 mm (L) x 1850 mm (W) x 2050 mm (H)
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Measuring Sensors
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2 Incremental Encoders
1 Torsional Accelerometer (TAC)
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Test Driving Torque (Peak Torque)
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0 - 25 (33 Nm)
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Part Rotating Speed
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0 – 2000 rpm
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Part Diameter Range
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40 – 250 mm
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Part Length Range
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40 – 400 mm
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Max Gear Width
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70 mm
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Center Distance Adjustable Range
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120 – 185 mm
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Part Load
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Manual and/or Automatic
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VERSIONS
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MODEL
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NVH G-EAR
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NVH G-EAR Double Slide (for Intermediate shaft sequencial inspection)
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NVH G-EAR for Wheels (without upper tailstock group)
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Download
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English
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SINGLE FLANK & NVH TEST FOR EV GEARS QUALITY CONTROL: (1.54MB)
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