ME 355: Introduction to Manufacturing Processes

[Pages:20]ME 355: Introduction to Manufacturing Processes

Lecture Notes Prepared by Junlan Wang

Associate Professor of Mechanical Engineering University of Washington

Figure Courtesy:

Manufacturing Processes for Engineering Materials, 5th ed.

Kalpakjian ? Schmid ? 2008, Pearson Education ISBN No. 0-13-227271-7

Chapter I Introduction

Manufacturing Design and manufacturing - Concurrent Engineering Design for Manufacturing, Assembly, Disassembly, Service Green Design, Sustainable Manufacturing, Product Life Cycle Materials Selection, Process Selection Computer Integrated Manufacturing Lean Production, Agile Manufacturing Quality Control, Total Quality Assurance Manufacturing Cost, Global Competitiveness

Definition and Importance of Manufacturing

Manufacturing: the process of converting raw materials into products; encompasse the deign and manufacturing of goods using various production methods and techniques.

~ came from Latin "manu factus" ? made by hand

nterchangeably used with "production"

"discrete" vs "continuous" products

Manufactured item has monetary worth (added value) than raw materials

Manufacturing is closely linked to national and global economy

Design and Manufacturing

equential Process

Design ->Manufacturing Waste resource, waste time

Concurrent Process

All disciplines are involved in the earliest stages of product design Progress concurrently so iterations results in less wasted effort and time Key to success: well-recognized communication among and within disciplines

FIGURE 1.3 (a) Chart showing various steps involved in de manufacturing a product. Depending on the complexity of the product a

~ Simultaneous Engineering

A systematic approach integrating the design and manufacture of the products with the view toward optimizing all elements involved in the life cycle of the product

Basic goal

? Minimize design and manufacture changes ? Minimize time and cost in taking the product from conceptual design to production

and introduction of the product to market

Key to success:

? Full support of an organization's top management ? Multifunctional and interacting work team, including support groups ? Utilization of all available state-of-the-art technologies

Design for Manufacture, Assembly, Disassembly, and Service

Each part or component of a product must be designed to not only meets desig requirements and specifications, but also to be manufactured economically and relative ease.

Product must be designed that individual parts can be assembled together with speed, and minimum cost.

Product must also be designed so that disassembly is possible with relative ease require little time, enabling the product to be taken apart for maintenance, serv or recycling of their components.

Product must be designed so that individual parts are easy to reach and service

Design Principle for Economic Production

Designs should be as simple as possible to manufacture, assembly, dissemble, servi and recycle. Materials should be chosen for their appropriate design and manufacturing characteristics as well as their service life. Dimensional accuracy and surface finish specified should be as broad as permissible Secondary and finishing operations should be avoided or minimized to reduce cost

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