Ejercicios Estiraje

Estiraje por Desarrollos

D N1 = 46.3372

D N2 = 967.925

D N3 =416.80

D N4 =586.104

ET = D cilindro productor / D cilindro alimentador

ET = 586.104 = 12.643

         46.3372

Estirajes Parciales

E 1-2 = 967.925 = 20.87
             46.3372

E 2-3 = 416.80 = 0.430
            967.925

E 3-4 = 586.104 = 0.430
              416.80

ET = (20.87)(0.430)(0.430) = 12.6175

Estiraje por Relación de Engranes

Et= θproductor x nproductor / θalimentador x nalimentador

ET = (1 1/4”) (120)(30)(55)(15)(80)(40)(90) = 12.643
          (1 1/8”) (20)(72)(30)(20)(25)(58)(60)

Estirajes Parciales

E1-2 = (5 1/8”)(120)(30)(55) = 2 0.87
            (1 1 /8”)(20)(72)(30)

E 2-3 = ( 1 1/3”)(15)(25)(58) = 0.430
             ( 5 1/8”)(80)(40)(90)

E 3-4 = (1 1/4”)(290) = 1.409
              (1 1/3”)(60)

ET = (20.87)(0.430)(1.409) = 12.617

Velocidades

n1 = (3,200)(45)(12) = 2,618.18
                    (30)(22)

n2 = (3,200)(45)(12)(28) = 1,047.27
         (30)(22)(70)

n3 = (3,200)(74) = 5,038.29
                    (47)

n4 = (3,200)(74)(84) = 19,237.13
                    (47)(22)

n5 = (3,200)(65) = 8,666.66
                    (24)

n6 = (3,200)(65) = 9,904.76
                    (21)

n7 = (3,200)(65) = 6,500
                    (32)

n8 = (3,200)(45) = 2,057.14
                    (70)

Desarrollos

D1 = π (2 1/2")(2,618.18) = 20,563.13

D2 = π (1 1/8")(1,047.27) = 3, 701.35

D3 = π (5")(5,038.29) = 79,141.27

D4 = π (2 1/4")(19,237.13) = 135,979.25

D5 = π (4 3/4")(8,666.66) = 129,328.79

D6 = π (1 1/2")(9,904.76) = 46,675.08

D7 = π (3 3/2")(6,500) = 91,891.58

D8 = π (6")(2,057.14) = 38,776.17

Estiraje por Desarrollos

ET = 38,776.17 = 1.88
         20,563.13

Estirajes Parciales

E 1-2 = 3,701.35 = 0.17
            20,563.13

E 2-3 = 79,141.27 = 21.38
              3,701.35

E 3-4 = 135,979.25 = 1.71
              79,141.27

E 4-5 = 129,328.79 = 0.95
             135,979.25

E 5-6 = 46,675.08 = 0.36
            129,328.79

E 6-7 = 91,891.58 = 1.96
             46,675.08

E 7-8 = 38,776.17 = 0.42
             91,891.58

ET =  (0.17)(21.38)(1.71)(0.95)(0.36)(1.96)(0.42) = 1.74

Estiraje por Relación de Engranes

ET = (   6   )(22)(30) = 1.88
         (2 1/2)(12)(70)

Estirajes Parciales
E 1-2 = (1 1/8)(28) = 0.18
             (2 1/2)(70)

E 2-3 = (   5   )(70)(22)(30)(74) = 21.38
             (1 1/8)(28)(12)(45)(47)

E 3-4 = (2 1/4)(84) = 1.71
             (   5   )(22)

E 4-5 = (4 3/4)(22)(47)(65) = 0.95
             (2 1/4)(84)(74)(24)

E 5-6 = (1 1/2)(24) = 0.36
             (4 3/4)(21)

E 6-7 = (3 3/2)(21) = 1.96
             (1 1/2)(32)

E 7-8 = (   6   )(32)(45) = 0.42
             (3 3/2)(65)(70)

ET= (0.18)(21.38)(1.71)(0.95)(0.36)(1.96)(0.42) = 1.85