Main Data
- Description: tyre shaping and curing press double enveloping worm gear(globoidal worm gearing)
- GEARX No.: TPW203.2-1
- Center distance: 203.2 mm
- Ratio: 70/1
- Starts of worm: 1
- Number of teeth of worm gear: 70
- Transverse module(Mt): 4.8057 mm
- Pressure angle: 21.813°
- Helical angle: 3.927° Helical hand: Right
- Worm:
- Material of worm: 42CrMo
- Heat treatment: Through quenching and tempering, then nitriding
- Tooth surface hardness: HV≥600
- Nitriding depth(CHD): 0.4 mm
- Tooth surface finish: Ground
- Tip diameter: 90.6 mm
- Reference diameter: 70 mm
- Face width: 107.5 mm
- Weight: 26 kg
- Worm gear
- Material: ZQSn10-1
- Tooth surface finish: Hobbing
- Tip Diameter: 350 mm
- Reference diameter: 336.4 mm
- Face width: 63.5 mm
- Weight: 35.1 kg
Application
- 40.5" Tyre curing press (NRM Brand)
The Main Fabrication Procedure
- Worm
- Forging the gear blank
- Normalizing
- Rough turning
- Ultrasonic inspection
- Quenching and tempering
- Semi-finish turning
- Aging treatment
- Coarse grinding the external and ends
- Turning tooth threads
- Semi-finish grinding tooth
- Nitriding
- Finish grinding the external and ends
- Gear grinding
- Inspection magnetic inspection the tooth flank, and then magnet demagnetization
- Facing up
- Worm gear
- Centrifugal casting
- IRough turning
- Semi-finish turning
- Hobbing
- Facing up
Technical Documents
- Inspection certificate of material
- Heat treatment certificate
- Certificate of ultrasonic inspection
- Magnetic particle detection certificate(on tooth flank)
- Size tolerance and geometric tolerance report
- Inspection report of tooth quality
Relative Standards
- GB/T16445-1996 Planar double-enveloping worm gear accuracy
- ANSI/AGMA 6035-A02 American National Standard Design, Rating and Application of Industrial Globoidal Wormgearing (Metric Edition)