PSI - Issue 12

Enrico Armentani et al. / Procedia Structural Integrity 12 (2018) 457–470 Author name / Structural Integrity Procedia 00 (2018) 000–000

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Table 1. Geometric parameters of the toothing. Symbol Meaning

Value

m c

Circular module Teeth number Circular pitch

1.3

z

50

p t = πm c = 4.084 mm h a = m c = 1.3 mm h d = 1.25m c = 1.625 mm

p c h a h d d p d a d f  c d b  h

Addendum Dedendum Whole depth Pitch diameter Outside diameter Bottom diameter Pressure angle Base circle diameter

h = h a +h d = 2.25m c = 2.925 mm

d p = 65 mm

d a = d p +2m c = 67.6 mm d f = d – 2h d = 61.7 mm

 c = 20°

d b = d p cos(  c ) = 61.08 mm

Helix angle

 = 5°,18° and 30°

L= πd p /tan(β) ; L(  =5°) = 2334.057mm; L(  =18°) = 628.474mm; L(  =30°) = 353.691 mm

L

Lead

Fig. 2. End-of-stroke die.

Fig. 3 shows the upper punch and the die of the tool produced by Officine Meccaniche Pontillo (  = 18 °).