End-of-Line Test of Center Differential
Need
Quality Control of Center Differentials
The customer, Meritor HVS, needed multiple pieces of equipment to ensure the quality of their production of center differentials.
They required a solution that could test and verify:
- Measurement of rotational deviation in gear pairs (SFT)
- Noise and vibration analysis (NVH)
- Contact pattern analysis
- Backlash control/measurement
- Bearing preload setting
- Final friction test
Solution
SEJFO's product, Heavy Rear Differential Unit Tester, SE-HRDU
Specification:
- Bosch Spindle, speed up to 3000 rpm
- Bosch Spindle, torque up to 270 Nm and Spindle2 torque up to 1095 Nm
- Machine footprint 3600 x 1700 mm, height 3300 mm
- Automatic or manual loading
- Rotec SFT and NVH analysis system
Transmission Test Capabilities:
- Transmission Error Single Flank Test (SFT)
- Noise, Vibration and Harshness (NVH)
- Contact Pattern Analysis
- Backlash control
- Bearing preload setting
- Final torque test
Facts
| Customer | Meritor HVS AB |
|---|---|
| Production Start | 2006, 2009 |
| Industry | Automotive |
| Managed Product | Central Differential for Trucks and Buses |
| Product Size | 400x300x300 mm |
| Product Weight | 190 kg |
| Cycle Time | 90 seconds |
| Serial Number | 07101, 0466 |
Result
The number of defects delivered to the end customer is negligible!
Two stable measuring machines that have ensured correct delivery to the end customer over a long period.
The rate of returns has decreased.
Quality costs have been reduced.
