engranajes (2)
39
ENGRANAJES
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engranes4
Transcript of engranajes (2)
Chapter 14: GearsDiámetro de cabeza: D= m (z+2)
Diámetro de fondo: D= m (z-2,5)
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Diámetro de cabeza: D= ma (z+2)
Diámetro de fondo: D= ma (z-2,5)
DIMENSIONES:
Fuerza axial:
Paso= m
Ejes perpendiculares:
Diámetro de cabeza: D= m (z+2)
Diámetro de fondo: D= m (z-2,5)
DIMENSIONES:
©1998 McGraw-Hill
En la figura se muestra una batidora industrial, en la que podemos ver los diferentes tipos de engranajes.
Aplicación de los diferentes tipos de ruedas
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Clase
Medio basto
Ultrafino
©1998 McGraw-Hill
Pasos diametrales
Pasos diametrales estándares comparados con el tamaño del diente. Se supone un tamaño real
Hamrock, Jacobson and Schmid
Addendum, Dedendum and Clearance
Table 14.2 Formulas for addendum, dedendum, and clearance (pressure angle 20°, full-depth involute.)
Text Reference: Table 14.2, page 623
Parameter
Symbol
Pitch and Base Circles
Figure 14.8 Pitch and base circles for pinion and gear as well as line of action and pressure angle.
Text Reference: Figure 14.8, page 624
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Figure 14.10 Illustration of parameters important in defining contact ratio.
Text Reference: Figure 14.10, page 629
Hamrock, Jacobson and Schmid
Line of Action
Figure 14.11 Details of line of action, showing angles of approach and recess for both pinion and gear.
Text Reference: Figure 14.11, page 629
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.12, page 632
Hamrock, Jacobson and Schmid
Text Reference: Table 14.3, page 633
Diametral pitch
pd, in.-1
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.15, page 636
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.16, page 636
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.17, page 637
Hamrock, Jacobson and Schmid
Figure 14.18 Effect of Brinell hardness on allowable bending stress for two grades of through-hardened steel [ANSI/AGMA Standard 1012-F90, Gear Nomenclature, Definition of Terms with Symbols, American Gear Manufacturing Association, 1990.]
Text Reference: Figure 14.18, page 638
Hamrock, Jacobson and Schmid
Figure 14.19 Effect of Brinell Hardness on allowable contact stress for two grades of through-hardened steel. [ANSI/AGMA Standard 1012-F90, Gear Nomenclature, Definition of Terms with Symbols, American Gear Manufacturing Association, 1990.]
Text Reference: Figure 14.19, page 639
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.20, page 640
Hamrock, Jacobson and Schmid
©1998 McGraw-Hill
Bending Stresses
Figure 14.21 Forces and length dimensions used in determining bending tooth stresses. (a) Tooth; (b) cantilevered beam.
Text Reference: Figure 14.20, page 641
Hamrock, Jacobson and Schmid
Lewis Form Factors
Table 14.4 Lewis form factors for various numbers of teeth (pressure angle 20°, full depth involute).
Text Reference: Table 14.4, page 642
Number of Teetch
Lewis form Factor
Spur Gear Geometry Factors
Figure 14.22 Spur gear geometry factors for pressure angle of 20° and full-depth involute. [ANSI/AGMA Standard 1012-F90, Gear Nomenclature, Definition of Terms with Symbols, American Gear Manufacturing Association, 1990.]
Text Reference: Figure 14.21, page 643
Hamrock, Jacobson and Schmid
©1998 McGraw-Hill
Application Factor
Table 14.5 Application factor as a function of driving power source and driven machine.
Text Reference: Table 14.5, page 643
©1998 McGraw-Hill
Size Factor
Table 14.6 Size factor as a function of diametral pitch or module.
Text Reference: Table 14.6, page 644
Diametral pitch pd, in.-1
Load Distribution Factor
Figure 14.23 Load distribution factor as function of face width and ratio of face width to pitch diameters. Commercial quality gears assumed. [From Mott (1992).]
Text Reference: Figure 14.23, page 645
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.24, page 645
Figure 14.24 Dynamic factor as function of pitch-line velocity and transmission accuracy level number.
Hamrock, Jacobson and Schmid
Figure 14.25 Helical gear. (a) Front view; (b) side view.
Text Reference: Figure 14.25, page 651
Hamrock, Jacobson and Schmid
Figure 14.26 Pitches of helical gears. (a) Circular; (b) axial.
Text Reference: Figure 14.26, page 652
Hamrock, Jacobson and Schmid
Motor Torque and Speed
Figure 14.28 Torque and speed of motor as function of current for industrial mixer used in case study.
Text Reference: Figure 14.28, page 655
Clase
P
aso
diametral
Medio basto
Ultrafino
Diámetro de fondo: D= m (z-2,5)
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Diámetro de cabeza: D= ma (z+2)
Diámetro de fondo: D= ma (z-2,5)
DIMENSIONES:
Fuerza axial:
Paso= m
Ejes perpendiculares:
Diámetro de cabeza: D= m (z+2)
Diámetro de fondo: D= m (z-2,5)
DIMENSIONES:
©1998 McGraw-Hill
En la figura se muestra una batidora industrial, en la que podemos ver los diferentes tipos de engranajes.
Aplicación de los diferentes tipos de ruedas
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Clase
Medio basto
Ultrafino
©1998 McGraw-Hill
Pasos diametrales
Pasos diametrales estándares comparados con el tamaño del diente. Se supone un tamaño real
Hamrock, Jacobson and Schmid
Addendum, Dedendum and Clearance
Table 14.2 Formulas for addendum, dedendum, and clearance (pressure angle 20°, full-depth involute.)
Text Reference: Table 14.2, page 623
Parameter
Symbol
Pitch and Base Circles
Figure 14.8 Pitch and base circles for pinion and gear as well as line of action and pressure angle.
Text Reference: Figure 14.8, page 624
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Figure 14.10 Illustration of parameters important in defining contact ratio.
Text Reference: Figure 14.10, page 629
Hamrock, Jacobson and Schmid
Line of Action
Figure 14.11 Details of line of action, showing angles of approach and recess for both pinion and gear.
Text Reference: Figure 14.11, page 629
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.12, page 632
Hamrock, Jacobson and Schmid
Text Reference: Table 14.3, page 633
Diametral pitch
pd, in.-1
Hamrock, Jacobson and Schmid
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.15, page 636
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.16, page 636
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.17, page 637
Hamrock, Jacobson and Schmid
Figure 14.18 Effect of Brinell hardness on allowable bending stress for two grades of through-hardened steel [ANSI/AGMA Standard 1012-F90, Gear Nomenclature, Definition of Terms with Symbols, American Gear Manufacturing Association, 1990.]
Text Reference: Figure 14.18, page 638
Hamrock, Jacobson and Schmid
Figure 14.19 Effect of Brinell Hardness on allowable contact stress for two grades of through-hardened steel. [ANSI/AGMA Standard 1012-F90, Gear Nomenclature, Definition of Terms with Symbols, American Gear Manufacturing Association, 1990.]
Text Reference: Figure 14.19, page 639
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.20, page 640
Hamrock, Jacobson and Schmid
©1998 McGraw-Hill
Bending Stresses
Figure 14.21 Forces and length dimensions used in determining bending tooth stresses. (a) Tooth; (b) cantilevered beam.
Text Reference: Figure 14.20, page 641
Hamrock, Jacobson and Schmid
Lewis Form Factors
Table 14.4 Lewis form factors for various numbers of teeth (pressure angle 20°, full depth involute).
Text Reference: Table 14.4, page 642
Number of Teetch
Lewis form Factor
Spur Gear Geometry Factors
Figure 14.22 Spur gear geometry factors for pressure angle of 20° and full-depth involute. [ANSI/AGMA Standard 1012-F90, Gear Nomenclature, Definition of Terms with Symbols, American Gear Manufacturing Association, 1990.]
Text Reference: Figure 14.21, page 643
Hamrock, Jacobson and Schmid
©1998 McGraw-Hill
Application Factor
Table 14.5 Application factor as a function of driving power source and driven machine.
Text Reference: Table 14.5, page 643
©1998 McGraw-Hill
Size Factor
Table 14.6 Size factor as a function of diametral pitch or module.
Text Reference: Table 14.6, page 644
Diametral pitch pd, in.-1
Load Distribution Factor
Figure 14.23 Load distribution factor as function of face width and ratio of face width to pitch diameters. Commercial quality gears assumed. [From Mott (1992).]
Text Reference: Figure 14.23, page 645
Hamrock, Jacobson and Schmid
Text Reference: Figure 14.24, page 645
Figure 14.24 Dynamic factor as function of pitch-line velocity and transmission accuracy level number.
Hamrock, Jacobson and Schmid
Figure 14.25 Helical gear. (a) Front view; (b) side view.
Text Reference: Figure 14.25, page 651
Hamrock, Jacobson and Schmid
Figure 14.26 Pitches of helical gears. (a) Circular; (b) axial.
Text Reference: Figure 14.26, page 652
Hamrock, Jacobson and Schmid
Motor Torque and Speed
Figure 14.28 Torque and speed of motor as function of current for industrial mixer used in case study.
Text Reference: Figure 14.28, page 655
Clase
P
aso
diametral
Medio basto
Ultrafino
