The aim of this course are to familiarize and equip students with global language of engineering drawing and manufacturing processes.

1. Engineering Graphics
(A 3-Credit course with lectures, discussions, and hands-on practices)
Aim
The aim of this course are to familiarize and equip students with
global language of engineering drawing and manufacturing
processes.
Recommended Background
This is course is designed for 2nd year
degree students.
Textbook
Giesecke et al., Modern Graphics
Communications (4th Edition), Prentice
Hall, 2010

2. Course Content
Week 1: Manufacturing Processes
Week 2: Layouts and Lettering
Week 3: Technical Sketching
Week 4: 2D Drawing Representation
Week 5: Sectional Views
Week 6: Auxiliary Views
Week 7: Dimensioning
Week 8: Tolerancing
Week 9: Threads, Fasteners, and Springs
Week 10: Working Drawings

3. Course Content
Week 1: Manufacturing Processes
Week 2: Layouts and Lettering
Week 3: Technical Sketching
Week 4: 2D Drawing Representation
Week 5: Sectional Views
Week 6: Auxiliary Views
Week 7: Dimensioning
Week 8: Tolerancing
Week 9: Threads, Fasteners, and Springs
Week 10: Working Drawings

4. What is Manufacturing
 From Latin  manu factus, means “made by hand.”
 Making of goods & services for sale.
 Manufacturing involves making products from raw
materials by various processes, machinery, and operations.
4
Raw Materials
Clay
Manufacturing
Processes
Finished
Products
ceramic cutting
tool or electrical
insulator
Week 1 Manufacturing Processes

5. Manufacturing Activities
 Manufacturing activities include:
 Product design
 Purchasing
 Manufacturing
 Production control
 Packaging & Warehouse
 Shipping
 Customer service
5

6. Manufacturing Activities
 For manufacturing activities need to ensure:
 Product must fully meet design requirements & product
specifications.
 Product must be manufactured by the most economical methods.
 Quality must be built into the product from design to assembly.
 Quality must be appropriate to the product’s use.
6

7. Design Process & Concurrent Engineering
 The design process requires a clear understanding
of the functions & performance expected of that
product.
 Concurrent engineering is a more modern approach
& all disciplines are involved in the early design
stages.
 The key to success of concurrent engineering is
communication between & within the disciplines.
7

8. Sequential Process
 Design & Manufacturing activities have
traditionally taken place sequentially.
 Designers preparing detailed part
drawings  material department choose
material  manufacturing department
produce warehouse.
 It’s a wasteful of resources & time.
8

9. Concurrent Process
 Concurrent engineering is a
systematic approach.
 To integrating the design &
manufacture.
 Optimizing all elements
involved in the life cycle of
the product.
9

10. Concurrent Engineering
 Life cycle  all aspects of the product
(design to disposal and recycling) are
considered simultaneously.
The basic goals are to
minimize product design
and engineering changes,
the time and costs.
The concurrent engineering environment
10

11. How dose CE reduce time?

12. Computer-Aided Design
 Computer-aided design (CAD) conceptualize objects
more easily without expensive prototypes.
 Computer-aided manufacturing (CAM)  utilizing &
processing the information on materials stored in a database.
12

13. The Role of Prototypes
 Produce prototype at low cost.
 Less time.
Virtual Prototype
 3D solid models used to evaluate appearance, customer
appeal, fit and clearance for assembled parts, mass
properties, kinematics, & other characteristics of the
design.
13

14. Rapid Prototyping systems
Stereolithography Apparatus (SLA)
 SLA uses laser-hardened resins to form models
 A laser hardens each layer in the shape of the cross section of a part.
 Holes and pockets in the model are formed by uncured resin.
SLA Rapid prototyping system
14

15. Selective Laser Sintering (SLS)
 SLS uses laser to fuse powdered metals, plastics or ceramics
 The fused layers is covered with additional powder & the next layer
fused to it.
 To form a hole, the powdered material is simply not fused that area.
SLS Rapid prototyping system
Elastomeric material used for
prototyping athletic equipment
15

16. Selective Laser Sintering (SLS)
16

17. 3D Printing
 3D printing “print” layers of molten
thermoplastic material.
 These low-cost machines were designed to
enable the use of prototypes early & often in the
design cycle.
17
Tiny planetary gears set 3D-printed
3D Printing System

18. Design for Manufacture
 Design for manufacture (DFM) integrate:
 Materials,
 Manufacturing methods,
 Process planning,
 Assembly,
 Testing, and
 Quality assurance
18

19. Design for Assembly
 DFA is an important part of manufacturing.
 Assembly operations can contribute
significantly to product cost.
Design for Manufacturing & Assembly
 Combined approach of
 Design for Manufacture
 Design for Assembly
19

20. Manufacturing Processes
 Categories of processing methods:
 Casting
 Forming and shaping
 Machining
 Joining
 Finishing
20

21. Computer-Integrated Manufacturing
 CIM is capable for:
 Responsiveness to rapid changes.
 Better use of materials, machinery, & reduced inventory.
 Better control & management of production &
manufacturing operations.
 High quality products at low cost.
21

22. Review Questions
1. What are the 3 important phases in the
manufacturing process?
2. Define Concurrent Engineering?
3. Explain the benefits of rapid prototyping?
4. Why computer-integrated manufacturing is
particularly effective?
22