Design Philosophy Week 1

Course Objective

• The course focuses on the fundamentals and principles of basic mechanical elements, the manufacturing considerations and the product design processes .

• The goal of this course is to understand the very basic principles of these processes without dealing with mathematical equations.

By the end of this course the student should be able to

Understand the principles of design, and the design processes.

Classify the main types of mechanical design.

Identify the different types of machine tool elements, and recognize the pros and cons of each element.

Get an overview of the manufacturing considerations.

Identify the product design process and its considerations.

Interact with the engineering world by applying the previously studied principles in a case study.

We will discuss in this week the following

• Design Philosophy

• Design Process

• Design Levels

• Types of Mechanical Design

• How to be Successful Designer

What is Design anyway ?

• Engineering Design is the process of devising a system, component, or process to meet desired needs.

• It is a decision-making process (often iterative), in which the basic sciences, mathematics, and engineering sciences are applied to optimally convert resources to meet a stated objective.

Design is everywhere

• Design is in everything around us, choose anything you see even if you choose the universe, you will discover that it’s well designed.

• As an example you will find that you have a fashion designer who design your cloth and its size.

• Interior decorative designer who made the art in your home. A machine designer who made the equipment that you use in your factory, also furniture, electronics, buildings, food products; as an example; each of it has an independent person who creates of develop that product which is called a designer and the process of creation is called Design.

The Design Process Paradox

Throughout the solution process knowledge about the problem and its potential solutions is gained and, conversely, design freedom is lost.

The more you learn the less freedom you have to use what you know.

Design Levels

Adaptive Design

Development Design

New Design

Types of Mechanical Design

Before beginning, we must realize that most design situations are a mix of various types of problems.

Traditionally, we decompose mechanical engineering by discipline: fluids, thermodynamics, mechanics, and so on

Types of Mechanical Design

• Selection Design

• Configuration Design

• Parametric Design

• Original Design

• Redesign

• Selection design involves choosing one item(or maybe more) from a list of similar items.

• We do this type of design every time we choose an item from a catalog.

Selection Design

To solve a selection problem we must start with a clear need

Configuration Design

• In this type of problem, all the components have been designed and the problem is how to assemble them into the completed product.

Parametric Design

• Parametric design involves finding values for the features that characterize the object being studied.

consider a very simple example.

We want to design a cylindrical storage tank that must hold 4𝑚3 of liquid. This tank is described by the parameters r, its radius, and l, its length and its volume is determined by V = π r ∗2 𝐿

Original Design

• We use it Any time the design problem requires the development of a process, assembly, or component not previously in existence .

• In many ways the other types of design problems—selection, configuration, and parametric are simply constrained subsets of an original design

• Example Design a machine element with based on it’s standard

Spur Gear on AGMA

(American Gear Manufacturing Association) Standard

Redesign

• Most design problems solved in industry are for the redesign of an existing product.

• Or in other words the modification of an existing product to meet new requirements.

How to be Successful Designer

First you need to be in the shoe of 3 persons

• Product Manager

• Product Designer

• Manufacturing Manager

Mechanical Design Languages

• Many “languages” or representations can be used to describe a mechanical object

Skilled Designer Speaks Many Languages

Graphical

Analytical Physical

Thank You