products

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)