CAD/CAM COURSE 7 TERM - DAWOOD UNIVERSITY OF …dcetind.weebly.com/uploads/9/1/6/3/9163431/lecture_1.… · · 2013-04-07Computer Aided Part Programming CNC Programs Computer Aided

TEACHER: ENGR. ASSAD ANISB.E (NED, MECHANICAL), MS(MECHANICAL, STRUCTURAL & MACHINE DESIGN, FINLAND) PE, MEM. IEEE, MEM. PEC

COURSE CONTENTS: INTRODUCTION TO CAD/CAM, COMPUTER METHODS IN CAD/CAM, GEOMETRIC MODELING, TRANSFORMATIONS, PROJECTIONS, CAD/CAM DATABASES, AUTOMATED MACHINE TOOLS & CUTTING TOOLS, NUMERIC CONTROL, MOTION CONTROL, APT PROGRAMMING, CNC MACHINE TOOLS PROGRAMMING, ROBOTICS, CONFIGURATIONS & MOTIONS

CAD/CAM COURSE 7th TERM

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MARKS DISTRIBUTION

Assignments & Attendance = 20 Marks (sessional) Examination = 80 Marks Practical = 30 Marks Project & Seminar = 20 Marks (Group

Work)

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LECTURE # 1

CAD/ CAM

TOPICS

Introduction to CAD/CAM

understanding of Product Design Cycles with CAD/CAM

Benefits of CAD/CAM

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INTRODUCTION TO CAD/CAM

CAD stands for Computer Aided Designing whileCAM is the abbreviation of Computer AidedManufacturing

Computer is helping to Design, Analyze &Manufacture the Product with in short span of time

CAD/CAM is playing a major role in reducing thetime to market

Precision & Accuracy is achieved in productdesign & development

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TIME REDUCTION TO MARKET

The use of computers has reduced the time tomarket with the following applications(a) Generating Product ConceptProduct concept is generated precisely along withdifferent alternatives(b) Product Variation- Computer generated models can be easilymodified- Save time by avoiding multiple prototypes

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TIME REDUCTION TO MARKET- CONTD.

(c) AnalysisAnalysis of Geometric Models on a computer canprevent testing of prototypes

(d) Production DrawingsMuch faster than conventional drawings

(e) Fast CommunicationCommunication of any type at any stage of theproduct development and marketing can be enhancedby a large factor using computers

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TIME REDUCTION TO MARKET- CONTD.

(f) Control- Better Control over manufacturing- Accurate Process Planning- Less defects

(g) Distribution & MarketingComputers used a control tool for distribution,marketing & sales to collect useful feedback fromthe customers

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PRODUCT DESIGN CYCLE(a) Conventional Product Design & Development CycleCONCEPTUAL DESIGN

ENGINEERING DESIGN

MANUFACTURING

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Conceptual Evaluation & Feasibility Study for concept

Evaluation

Market Need Idea Generation Final Product Concept

Product Design & Detailing

Production Drawing & Technical Illustrations

Design New Tools Machines & Jigs/Fixtures Production Drawing &

Technical IllustrationsOrder Materials, Tools

Machines and Jigs/Fixtures

Production Planning & Scheduling Control

Actual Production

Inspection & Quality Control

Packaging & Shipping

Marketing

Feedback




PRODUCT DESIGN CYCLE- CONTD(b) Product Design & Development Cycle with Computers

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Geometric & Mathematical

Modeling

Conceptual Evaluation & Feasibility Study for concept

Evaluation

Market Need Idea Generation Final Product concept

Computer Aided Analysis (FEA,CFD, etc.)

Computer Aided Design

Simulation (Geo,

Assembly etc.)

Prod. & Assembly Drawings

Computer Aided Drafting

Computer Aided Process

Planning

Computer Aided Part

Programming

CNC Programs

Computer Aided Tool, M/C and Fixture Design

Computer Aided Material Planning & Handling & Ordering

Computer Aided Production Planning &

Scheduling

Computer Controlled Robots & Other Devices Actual Production

Inspection & Quality Control

Packaging & shipping

Computer Aided Quality Control

Computer Aided Packaging &

Shipping

Sales & MarketingFeedback




COMPUTER AIDED DESIGN- CADThe various phases of CAD section are as follows

Geometric ModelingGeometric modeling and computer graphic helps to generate and visualize models on which the analysis is done

Design & Optimization ToolAlgorithms for exclusive applications are applied onto the virtual product already modeled

Drafting & Documentation ToolThe model already created, analyzed and optimized guarantees a safe model under real conditions. The safe model’s drawings are to be communicated to the production floor with technical illustrations

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Geometric ModelDesign & Analysis

Design Optimization

Drafting & Documentation




DEFINITION OF CAD

A Process of use of computers in creating, analyzing, modifying,

optimizing and drafting /documenting a product data so

as to achieve its design goal efficiently and effectively is

called CAD 3/25/2011 11




Computer Aided Drafting Computer Aided Design/ Modeling

This is done after analysis is performed on the geometric model

This is done before analysis is performed on geometric model

The dimension shown in computeraided drafting are safe , sincethese are drawn after analysis

This provides the dimensionswhich may or may not be safe

This is generally a 2D drawing This is a 2D or 3D model

These are made basically for conveying the production design

The model is used for design analysis

This is drawn with reference from the model already created

Model is developed from scratch

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COMPUTER AIDED MANUFACTURING- CAMVarious phases of computer aided manufacturing are as follows

A Process of use of computers in planning, manufacturing, inspecting and

controlling the manufacturing operation is called CAM

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Geometric ModelProcess Planning

NC Part Programming

Machining

Inspection

Packaging




COMPUTER INTEGRATED MANUFACTURING- CIM

The process of integration of CAD, CAM and business aspects of a factory is called CIM

CIM attempts to describe complete automation with all processes, functioning under computer

controlCIM Includes MIS (Management Information System), sales, marketing, finance, database management system, design, manufacturing, monitoring and control and bar code software

etc. which helps to manage and control the overall factory environment

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BENEFITS OF CAD/CAM Market needs and demands can be easily

gathered CAD is faster and accurate method of designing

components of products With CAD technologies, it is easy to change or

manipulate the geometric shapes, sizes andother specifications to try out different variantswithout actually making prototypes CAD helps to reduce the engineering personal

requirements3/25/2011 15




BENEFITS OF CAD/CAM- CONTD A component can be easily drafted after designing

because of its associativity Several design and manufacturing factors can be

considered simultaneously and therefore can bedesigned concurrently

CAD utilizes the capability of advanced graphicsand with this, models can be envisioned as realproducts

CAM assures better organized machining andprocess planning and hence increase productivity

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BENEFITS OF CAD/CAM- CONTD

CAM tries to ensure least production haltsbecause of organized planning of inventory Organizations are benefited from less

rejection because of computer aided controland monitoring of process using CAM It helps to bring product in the market much

faster than traditional design anddevelopment

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Documents

CAD/CAM COURSE 7 TERM - DAWOOD UNIVERSITY OF …dcetind.weebly.com/uploads/9/1/6/3/9163431/lecture_1.… · · 2013-04-07Computer Aided Part Programming CNC Programs Computer Aided