Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Kinematics Fundamentals
Review Problems
Chapter (2)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Problem 2-24 (a)
Find:
Slide No.2
Link 6 moves horizontally
in a straight line
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Graphical Linkage Synthesis
Chapter (3)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Learning Objectives
Distinguish what is meant by:
Define and distinguish:
Slide No.2
Functi
Design of Machinery
Vibrations and Resonance
(Cam Dynamics)
Chapter (15)
Dr. Sayed Aziz
ME358, Theory of Machine and Mechanisms
Log Decrement
Slide No.2
A method to experimentally measure
damping ratio in under-damped systems
ME358, Design of Machinery
Sa
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Position Analysis
Chapter (4)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Problem 4-19
For one revolution of the driving link 2 of the walkingbeam indexing and pick-and-place
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Cam Design
Chapter (8)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
What is Cam-Follower?
A cam and follower is system/mechanism that uses a
cam and follower to create a specif
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Cam Design
Chapter (8)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Choosing Cam Functions
They must obey the fundamental law of cam
design
The cam-follower function must have
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Gear Trains
Chapter (9)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Planetary Gear Trains
Conventional gearset
a single degree of freedom geared
system
Planetary gear train
a
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Balancing
Chapter (12)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Balancing
Elimination of unwanted shaking forces and
moments in rotating machinery
Any system in pure rotati
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Kinematics Fundamentals
Chapter (2)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Linkage transformation
Revolute (R)
Rule #1:
Slide No.2
Prismatic (P)
Revolute joints in any lo
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Review
(Chapter 1 to Chapter 7)
ME358, Theory of Machine and Mechanisms
MIDTERM
MIDTERM
(Ch1-Ch7)
Part (1): Monday, March 25, Room P116
& P120
(Open textbook & Notes), No Laptop/phone
From 12:00 PM
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Gear Trains
Chapter (9)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Transferring Rotary Motion
Gear analysis is based on rolling cylinders
Rolling cylinder + meshing teeth
(sl
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Dynamic Force Analysis of Linkages
Chapter (11)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Shaking Force
Forces delivered by the moving links to the ground at the fixed pivot
Design of Machinery
Review
(Chapter 8 to Chapter 15)
Dr. Sayed Aziz
ME358, Theory of Machine and Mechanisms
Question 1
In a radial cam-follower system, the
follower moves:
In a direction perpendicular to the cam axis
In a direction parallel to the cam ax
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Graphical Linkage Synthesis
Chapter (3)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Coupler Curves
Coupler is the most interesting link in
any linkage
Complex motion
Generate
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Acceleration Analysis
Chapter (7)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Problem 6-67 and 7-55
Figure shows a drum-pedal mechanism.
Find:
Slide No.2
O2A = 100mm at 162o a
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Dynamic Force Analysis of Linkages
Chapter (11)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Newtonian Method
Assumes all kinematic data are calculated
Sum forces and torques
B
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Cam Design
Chapter (8)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
SVAJ Diagram
Radius of curvature
Cam Size
Slide No.2
ME358, Design of Machinery
Sayed Aziz
Graphical Solutio
ME 358: Machine Dynamics and Mechanisms
Lab 9: Dynamic Force Analysis of Linkages
Lift Mechanism
Objective:
Use the LINKAGES program to analyze the forces on a fourbar linkage.
Problem Statement:
Figure 1 shows a mechanism that lifts a package from one co
Design of Machinery
Dynamic Force Analysis of Linkages
Chapter (11)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Newtonian Method
Assumes all kinematic data are calculated
Sum forces and torques
Break forces into components
Slide No.2
Design of Machinery
Midterm Review
(Chapter 1 - Chapter 7)
Midterm: 3/24/2017
ME358, Theory of Machine and Mechanisms
Question #1
The approximate straight line mechanism
is a
a)
b)
c)
d)
4
6
8
3
bar
bar
bar
bar
linkage
linkage
linkage
linkage
ME358, Desig
Design of Machinery
Kinematics Fundamentals
Chapter (2)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Introduction
Degree of Freedom (DoF)
The systems DOF is equal to the number of independent
parameters that are needed to uniquely def
Design of Machinery
Position Analysis
Chapter (4)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Problem 4-19
For one revolution of the driving link 2 of the walkingbeam indexing and pick-and-place mechanism in Figure:
Find the horizont
Design of Machinery
Kinematics Fundamentals
Review Problems
Chapter (2)
Dr. Sayed Aziz
ME358, Theory of Machine and Mechanisms
Problem 2-24 (a)
Find:
Slide No.2
Link 6 moves horizontally
in a straight line
Mobility
ME358, Design of Machinery
Sayed Aziz
So
Design of Machinery
Graphical Linkage Synthesis
Chapter (3)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Problem 3-19
Slide No.2
Design a pin-joined linkage that will guide the forks of
the forklift in the shown Figure up and down in
Lab 9: Dynamic Force Analysis of
Linkages
Distance of the Coupler Point AC
= 1.820 = Law of Cos
Angle of Coupler Point within Link 3
=15.6 Degrees =
Law of Cos =
15.6 =
Length of Ground Link
= .934 =
Angle of Ground Link
= -74 Degrees
Polar Mode
Mass, CG
Lab 6: Design of the Cam
Follower System
Problem 1: Motion Program
Problem 1: Boundary Condition (Rise)
Problem 1: Boundary Condition (Fall)
Problem 1: SVAJ Diagram
Problem 1: Max V, A, J
Problem 1: Cam Profile
Problem 1: Cam Profile
Problem 1: Phi & Rho
4.18
B.
Mechanism Diagram
1
Theta 3 and 4 with Respect to Crank Angle
Transmission Angle
2
F.
Mechanism Diagram
3
Piston Displacement
4
Rod Angle
4.23
5
Mechanism Diagram
Theta 3 and 4 Angular Displacements
Coupler Point X & Y Displacement
6
4.28
MAX ANGU
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Introduction
Chapter (1)
ME358, Mechanisms and Machine Dynamics
(Notes by Dr. Sayed Aziz)
Definitions
Mechanism
A system of elements arranged to transmit
motion in a predicted manner.
Slide No.2
I
Design of Machinery
Instructors: Sayed Aziz & Yazan Manna
Gear Trains
Chapter (9)
ME358, Theory of Machine and Mechanisms
(Notes by Dr. Sayed Aziz)
Problem 9-9
Design a simple spur gear train for a ratio
of +6.5:1 and a diametral pitch of 5.
Specify pitch