Lecture_19

Lecture_19 - Kinematics and Dynamics of Machines ENGR 3270U...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Kinematics and Dynamics of Machines ENGR 3270U Lecture 19 Yuping He University of Ontario Institute of Technology November 24, 2008
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.1 Procedure for Selecting Standard Gears Standard gears are interchangeable and any two standard gears can be meshed together. The following conditions are required: a. The pressure angles must be the same ; b. The diametral pitches must be the same ; c. The dedendum on a given gear must be greater than the addendum on the mating gear ; d. The tooth thicknesses must be equal to one-half the circular pitch. b a t 1) Choose pressure angles. o 20 o 25 commonly used o 2 1 14 now little used
Background image of page 2
1.2 2) Define a tooth size parameter (i) diametral pitch ( ) for US IPS units d P ) / 1 ( in d N P p d N d p p c / where (ii) module (m) for metric units 2, 2.5, 3, 3.5, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 36, 40, 42, 48, 50, 64, 72, 80, 96, 120 Commonly used diametral pitch values are listed: ) ( mm N d m p where d P m / 1 1, 1.25, 1.50, 1.75, 2, 2.25, 2.50, 2.75, 3, 5, 6, 8, 10, 12, 16, 20 Commonly used module values are listed:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.3 3) Determine values for a, b and t b a t For designs with US IPS units (a) o 20 (i) 99 . 19 ~ 1 d P d P a / 000 . 1 d
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

Lecture_19 - Kinematics and Dynamics of Machines ENGR 3270U...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online