Lecture 6 Gear Trains
Mid-Term Exam
Mid-term review: 26 Feb
Mid-term Exam: 5 March
Gear Pair
Gear velocity ratio:
R12
2 d1 mN1 N1
1 d 2 mN2 N 2
http:/www.mhhe.com/engcs/mech/norton/norton/ch9.html
Simple Gear Trains
The expression for this simple
g

Lecture 2 - Machine Kinematics
When going from a design concept to an actual
engineering design, we need to specify:
Materials
Dimension and tolerance
Manufacturing and assembly processes,
But first, we need to ensure machine is able to
move in the d

Web Animations
http:/www.flying-pig.co.uk/
http:/www.robives.com/mechs
http:/www.mhhe.com/engcs/mech/norton/no
rton.html
Variable speed Kinematic Pairs
Slider-crank linkage
The mathematical model
or
R+Ls=0
Rcos + Lcos s = 0
Rsin Lsin = 0
A
L
B
s
R
OB

Shigleys Mechanical
Engineering Design
Chapter 3: Load and Stress Analysis
Load Analysis
In the previous chapter, we see how machines
move.
In this chapter, we will see how machines carry
loads
Load analysis include
Power transmission in a machine
Fo

Shigleys Mechanical
Engineering Design
Chapter 3: Load and Stress Analysis
Component Design
In the previous chapters, we saw:
How machine moves.
How machine takes loads
How machine components are made
Materials
Manufacture
Geometry Dimensioning and

Design Synthesis, Design
Optimization
Today:
In class design example
Design optimization
1
In class Example
We have a robotic arm with a
drill mounted on the end.
We need to design the gearbox
for the drill.
We want the fastest possible
drill speed.

Design Synthesis, Design
Optimization
In the previous chapters, we see:
How machine moves
How machine takes loads
How machine components are made
How to size the components
In this chapter, we will study how to put the
components together to form a mach

Shigleys Mechanical Engineering
Design
Chapter 5: Failure Resulting from
Static loading
Failure theories
Questions: under what stress condition that
a component will fail?
Varies theories have been developed, mainly
including
Three theories
Stress-bas

Shigleys Mechanical
Engineering Design
Chapter 2: Materials
Materials & Manufacture
In the previous chapters, we have seen
How a machine moves.
How a machine takes loads
In this chapter, we will briefly study materials and
manufacture for design
Mate

PROBLEM 1.64
KNOWN: Inner surface heating and new environmental conditions associated with a spherical shell of
prescribed dimensions and material.
FIND: (a) Governing equation for variation of wall temperature with time. Initial rate of temperature
chang

Jan. 20, 2016
MAEG3040 MECHANICAL DESIGN
Assignment #1
Due Date: January 29th, 2016
1. Three blocks A, B, and C and a grooved block D have dimensions a, b, c, and d as follows:
= 1.000 0.001
= 2.000 0.003
= 3.000 0.005
= 6.020 0.006
The blocks are

MAEG3040 MECHANICAL DESIGN
Problem Set #4
Due: March 12, 2016
1. A bar of steel has the minimum properties Se = 276 MPa, Sy = 413 MPa, and Sut = 551 MPa. The bar is
subjected to a steady torsional stress of 103 MPa and an alternating bending stress of 172

MAEG3040 MECHANICAL DESIGN
Solution of Problem Set #3
1. A 1035 steel has a tensile strength of 70 kpsi and is to be used for a part that sees 450 in
service. Estimate the Matin temperature modification factor and ( )450 if
(a) The room-temperature endura

MAEG3040 MECHANICAL DESIGN
Solution of Problem Set #2
1. Using singularity functions to find the reactions at the supports and plot the shear-force and
bending-moment diagrams for each of the beams shown in the figure below. Label the diagrams
properly.
a

MAEG3040 MECHANICAL DESIGN
Problem Set #6
Due: March 25, 2016
(Bolt) 1. A single-threaded 25-mm power screw is 25 mm in diameter with a pitch of 5 mm. A vertical load
on the screw reaches a maximum of 5 kN. The coefficients of friction are 0.06 for the co

Lecture 5 Gears
Classes of Kinematic Objects
Kinematic layout can be classified as
Fixed kinematic pairs
Gears
Belts
Variable kinematic pairs
Closed loop systems
Four bar mechanism
Slide and crank mechanism
Cam and follower
Open loop systems
Robot

Lecture 4 Cams
Variable Speed Kinematic Pairs
Cams and Followers
A cam and follower mechanism consists
of two parts:
The driving link: the cam, which rotates
at a constant speed
The driven link: the follower, which
moves in a certain trajectory
Embedd

Department of Mechanical & Automation Engineering
MAEG 3040 Mechanical Design
Term 2, 2012 2013
Assignment #4
Due Date: March 12th
1. Design a simple, spur gear train for a ration of -9:1 and diametral pitch of 8. Specify pitch
diameters and numbers of te

Department of Mechanical & Automation Engineering
MAEG 3040 Mechanical Design
Term 2, 2012 2013
Assignment #3
Due Date: Feb. 26, 2013
1. Find the angular velocity of link 3 and 4 in the XY coordinate system for the linkage in Figure 1
in position shown. A

Department of Mechanical & Automation Engineering
MAEG 3040 Mechanical Design
Term 2, 2012 2013
Assignment #5
Due Date: 26 March, 2013
1. Using figure 1, sketch a free-body diagram of each element in the figure. Compute the
magnitude and direction of each

Department of Automation & Computer-Aided Engineering
MAEG 3040 Mechanical Design
Term 2, 2012 2013
Assignment #6
Due April 16, 2013
1. A 1020 hot-rolled steel has the following properties:
,
. For the
S y 294 MPa Sut 463 MPa
static stress states listed b

Department of Mechanical & Automation Engineering
MAEG 3040 Mechanical Design
Term 2, 2012 2011
Assignment #2
Due Date: Feb. 5
1. A four-bar linkage as in Figure 2.3a below has link lengths r1 = 450 mm, r2 = 100 mm, r3 = 200
mm, r4 = 400 mm.
i.
For the in

Department of Mechanical & Automation Engineering
MAEG 3040 Mechanical Design
Term 2, 2012 2013
Assignment #1
Assigned on 22 January, Due: 29 January
1. Find the mobility, the Grashof condition of the oil field pump shown in Figure 1.
Fig. 1 An oil field

"u
Name: Law Shuk Yee Zoe SID: 08632192
IVIAE3040 assignment 1
m=4, 11:4
M=3(n—1)—2m:3(4—1)— x4=1
Mobility m 1
i = 80
5 = 14
p = 51.26
q = m = 79.7
' short baris side and £+ s = 94 < p + q = 130.96
It is rocker—crank mechanism. 171:4, n=4
M=3(n—1