EJERCICIOS DE ESTIRAJE

EJERCICIO 1

Estirajes por Desarrollos.

D batidor= 40,854.59 “/min

D regulador= 14,507.91 “/min

D intermedio= 14,443.49 “/min

D limpiador= 19343.49 “/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et= 19,343.49”/min / 40,854.59”/min

Et=0.77

Parcial

E1-2= 14,507.91“/min / 40,854.59 “/min

E1-2= 0.35

E2-3= 14,443.49“/min / 14,507.91 “/min

E2-3= 0.99

E3-4= 19,343.49“/min / 14,443.49 “/min

E3-4= 1.33

Et= 0.35 x 0.99 x 1.33=0.46

E1-3= 14,443.49“/min / 40,854.59 “/min

E1-3= 0.35

E3-4= 19,343.49“/min / 14,443.49 “/min

E3-4= 1.33

Et= 0.35 x 1.33=0.46

E1-2= 14,507.91“/min / 40,854.59 “/min

E1-2= 0.35

E2-4= 19,343.49“/min / 14,507.91 “/min 

 E2-4= 1.33

Et= 0.35 x 1.33=0.46

Estirajes por relación de engranes.

Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et= (2.25”)(10)(25) / (5.5”)(12)(18)=0.47

Parcial

1-2=  (3.375”)(10)(25) / (5.5”)(12)(30)= 0.42

2-3= (2.33”)(30) / (3.375”)(25)= 0.82

3-4= (2.25”)(25) / (2.33”)(18)= 1.34

Et= 0.42 x 0.82 x 1.34=0.46

PROBLEMA 2

Estiraje por desarrollos

D n1= 24,798.94”/min

D n2= 175,659.20”/min

D n3= 226,032.06”/min

D n4= 266,394.93”/min

D n5= 284,914.33”/min

D n6= 162,502.64”/min

D n7= 216,059.98”/min

D n8= 186,143.96”/min

D n9= 452,433”/min

D n10= 116,709”/min

Total

 Et= D cilindro productor/ D cilindro alimentador

Et= 116,709”/min / 24,798.94”/min=4.7

Parcial

 1-3=  226,032.06”/min / 24,798.94”/min= 9.11

3-5= 284,914.33”/min / 226,032.06”/min= 1.26

5-9= 452,433”/min / 284,914.33”/min= 1.58

9-10= 116,709”/min / 452,433”/min= 0.25

Et= 9.11 x 1.26 x 1.58 x 0.25=4.5

Estiraje por relación de engranes.

Total

 Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et=(3.33”)(50)(25)(30)(14)(20)(12)(25) / (1.25”)(12)(32)(179(30)(169(15)(36)=4.9

Parcial

 1-3= (3.5”)(50)(25) /(1.25”)(12)(32)=  9.11

3-5= 2.5”)(30) / (3.5”)(17)= 1.26

5-9= (6.125”)(14)(20)(12)(25)= / (2.5”)(30)(16)(15)(18)= 1.58

9-10= (3.16”)(18) / (6.125”)(36)= 0.25

Et= 9.11 x 1.26 x 1.58 x 0.25=4.5

EJERCICIO 3

Estirajes por desarrollos.

D N1= 18,329.30”/min

D N2=56,990.45”/min

D N3=59,101.35”/min

D N4=109,759.39”/min

D N5=67,544.38”/min

D N6=650,427.31”/min

D N7=225,147.38”/min

D N8=445,592.27”/min

D N9=300,188.6”/min

D N10=1’084,014.39”/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et= 1’084,014.39”/min/  18,329.30”/min=59.14

Parcial

1-2= 56,990.45”/min / 18,329.30”/min= 3.10

2-4= 109,759.39”/min / 56,990.45”/min= 1.92

4-7= 225,147.38”/min / 109,759.39”/min= 2.05

7-8= 445,592.27”/min / 225,147.38”/min= 1.97

8-9= 300,188.6”/min / 445,592.27”/min= 0.67

9-10= 1’084,014.39”/min / 300,188.6”/min= 3.61

Et= 3.10 x 1.92 x 2.05 x 1.97 x 0.67 x 3.61=58.1

Estirajes por relación de engranes.

Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et= (6.5”)(38)(80)(40)(40)(60) / (5.5”)(15)(20)(30)(18)(36)=59.13

Parcial

1-2= (6.75”)(38) / (5.5”)(15)= 3.10

2-4= 3.25”)(80) / 6.75”)(20)= 1.92

4-7= (1.125”)(40)(40)(60) / (3.25)(30)(18)(30)= 2.05

7-8= 2.375”9(30) / (1.125”)(32) = 1.97

8-9= (1.25”)(32) / 2.375”)(25)= 0.67

9-10= (6.5”)(25) / (1.25”)(36)= 3.61

Et= 3.10 x 1.92 x 2.05 x 1.97 x 0.67 x 3.61=58.1

EJERCICIO 4

 Estiraje por Desarrollos.

n1= ((400)(18)(8)(18)) / ((6)(20)(17))= 508 rpm

D n1= π x 508 x 15= 23,983”/min

n2= ((400)(18)(8)(18)) / ((6)(20)(15))= 576 rpm

D n2= π x 576 x 12= 21,714”/min

n3= ((400)(18)(8)) / ((6)(20))= 480rpm

D n3= π x 480 x 10= 15,079”/min

n5= ((400)(18)(8)(18)(12)(15)) / ((6)(20)(17)(19)(17))= 283 rpm

D n5= π x 283 x 3= 2667”/min

n6= 400 rpm

Dn6= π x 400 x 7.5= 9424”/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et= 9424”/min / 23,983”/min= 0.39

Parcial  

1-2= 21,714”/min / 23,983”/min= 0.9

2-3= 15,079”/min / 21,714”/min= 0.69

3-5= 2667”/min / 15,079”/min= 0.17

5-6= 9424”/min / 2667”/min= 3.5

Et= 0.9 x 0.69 x 0.17 x 3.5= 0.36

Estiraje por relación de engranes.

 Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et=((7.5”)(17)(20)(6) / (15”)(18)(8)(18)= 0.39

 Parcial.

1-2= (12”)(17) / (15”)(15)= 0.90

2-3= (10”)(15) / (12”)(18)= 0.69

3-5= (3”)(18)(12)(15) / (10”)(17)(19)(17)= 0.17

5-6= (7.5”)(17)(19)(17)(20)(6) / (3”)(15)(12)(18)(8)(18)= 3.5

Et= 0.9 x 0.69 x 0.17 x 3.5= 0.36 

EJERCICIO 5:

Estiraje por desarrollos.

N1= (2800)(28)(23)(50)(50)(27) / (15)841)(23)(80)(30)= 3585 rpm

D n1= π x 3” x 3585= 33787”/min

N2= (2800)828) / (15)=5226 rpm

D n2= π x 1.5” x 5226= 24,626”/min

N3= (28009(28)823) / (15)(41)= 2,932 rpm

D n3= π x 2” x 2,932= 18,422”/min

N4= (2800)828)(23)(25) / (15)(41)(14)= 5235.77 rpm

D n4= 1.5” x π x 5235.77= 24,673.04”/min

N5= (2800)(28)823)813) / (15)(41)(27)= 1444 rpm

D n5= π x 5” x 1411= 22,163”/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et=22,163”/min / 33787”/min= 0.65

Parcial

1-2= 24,626”/min / 33787”/min= 0.72

2-3= 18,422”/min / 24,626”/min= 0.74

3-4= 24,673.04”/min / 18,422”/min= 1.33

4-5= 22,163”/min /  24,673.04”/min= 0.89

Et= 0.72 x 0.74 x 1.33 x 0.89= 0.63

Estiraje por relación de engranes.

Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et= (5”)(30)(80)(23)(13) / (3”)(27)(50)(50)(27)= 0.65

Parcial

1-2= (1.5”)(30)(80)823)(41) / (3”)(27)(50)850)(23)= 0.72

2-3= (2”)(23) / (1.5”)(41)= 0.74

3-4= (1.5”)(25) / (2”)(14)= 1.33

4-5= (5”)(14)(13)/(1.5”)(25)(27)=0.89

Et= 0.72 x 0.74 x 1.33 x 0.89= 0.63

EJERCICIO 6

Estiraje por desarrollos.

N1= (7000)(32) / (12)= 18,666 rpm

D n1= π x 2.125” x 18,666= 124,612”/min

N2= (7000)(32) / (31)= 7,225 rpm

D n2= π x 2.25” x 7,225= 51,070”/min

N3= 7000rpm

D n3= π x 1.33” x 7000= 29,248”min

N4= (7000)(57) / (72)= 5,541 rpm

D n4= π x 5,541 x 2”= 34,815”/min

N5= (700)(57)(20)(19)(28)825) / (72)(16)835)(59)835)= 1274 rpm

D n5= π x 4.7512 x 1274= 19,011”/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et= 19,011”/min / 124,612”/min= 0.15

Parcial

1-2= 51,070”/min / 124,612”/min= 0.40

2-3= 29,248”min / 51,070”/min= 0.57

3-4= 34,815”/min / 29,248”min= 1.19

4-5= 19,011”/min / 34,815”/min= 0.54

Et= 0.40 x 0.57 x 1.19 x 0.54= 0.14

Estiraje por relación de engranes.

Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et=(4.75”)(12)(57)820)(19)(289825) / (2.125”)(32)(72)(16)(35)(59)(35)= 0.15

Parcial

1-2= (2.25”)(12) / (2.125”)(31)= 0.40

2-3= (1.33”)(31) / (2.25”)(32)= 0.57

3-4= (2”)(57)/ (1.33”)(72)= 1.19

4-5= (4.75”)(20)(19)(28)(25) / (2”)(16)(35)(59)(35)= 0.54

Et= 0.40 x 0.57 x 1.19 x 0.54= 0.14

EJERCICIO 7

Estiraje por desarrollos

N1= (3200)(45)(12) / (30)(22)= 2618 rpm

D n1= π x 2618 x 2.5”= 20,561”/min

N2= (3200)(45)(12)(28) / (30)(22)(70)= 1047 rpm

D n2= π x 1047 x 1.125”= 3700”/min

N4= (3200)(74)(84) / (47)(22)= 19,237 rpm

D n4= π x 2.25” x 19,237= 135,978”/min

N5= (3200)(65) / (24)= 8666 rpm

D n5= π x 8666 x 4.75”= 129,318”/min

N7= (3200)(65) / (32)= 6500 rpm

D n7= π x 6500 x 4.5”= 91,891”/min

N8= (3200)(45) / (70)= 2057 rpm

D n8= π x 2057 x 6”= 38,773”/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et=38,773”/min / 20,561”/min= 1.88

Parcial

1-2= 3700”/min / 20,561”/min= 0.17

2-4= 135,978”/min / 3700”/min= 36.75

4-5= 129,318”/min / 135,978”/min= 0.95

5-7= 91,891”/min  / 129,318”/min =0.71

7-8= 38,773”/min / 91,891”/min= 0.42

Et= 0.17 x 36.73 x 0.95 x 0.71 x 0.42= 1.76

Estiraje por relación de engranes

Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et= (6”)(32)(45) / (2.5”)(12)(70)= 1.8

Parcial

1-2= (1.125”)(28) / (2.5”)(70)= 0.18

2-4= (2.25”)(70)(22)(30)(74)(84) / (1.125”)(28)(12)845)(47)(22)= 36

4-5= (4.75”)(22)(47)(65) / (2.25”)(84)(74)(24)= 0.95

5-7= (4.5”)(24) / (4.75”)(32)= 0.71

7-8= (6”)(32)(45) / (4.5”)(65)(70)= 1.83

EJERCICIO 8

Estiraje por desarrollos.

N1= (1800)(27)(19)(25)(20)(30)(72)(20) / (160)(40)(80)(15)(55)(30)(120)= 13 rpm

D n1= π x 13 x 1.125”= 45”/min

N2= (1800)(27)(19)(25)(20) / (160)(40)(80)(15)= 60 rpm

D n2= π x 60 x 5.125”= 966”/min

N3= (1800)(27)(19) / (160)(58)= 99 rpm

D n3= π x pp x 1.33= 413”/min

N4= (1800)(27)(19)(90) / (160)(58)(60)= 149 rpm

D n4= π x 149 x 1.25”= 585”/min

Total

Et= D cilindro productor/ D cilindro alimentador

Et=585”/min / 45”/min= 13

Parcial

1-2= 966”/min / 45”/min= 21.46

2-3= 413”/min / 966”/min= 0.42

3-4= 585”/min / 413”/min= 1.41

Et= 21.46 x 0.42 x 1.41= 11.98

Estiraje por relación de engranes.

Total

Et= π x ф productor  x n productor / π x ф alimentador  x n alimentador

Et= (1.25”)(120)(30)(55)(15)(80)(40)(90) / (1.125”)(20)(72)(30)(20)(25)(58)(60)= 12.6

Parcial

1-2= (5.125”)(120)(30)(55) / ((1.125”)(20)(72)(30)= 21.47

2-3= (1.33”)(15)(80)(40) / (5.125”)(20)(25)(58)= 0.42

3-4= (1.25)(90) / (1.33”)(60)= 1.40

Et= 21.4 x 0.4 x 1.4= 11.98