Use of Technology for Engineering and Design Overview

Introduction

Which of the following statements correctly answers this question:

Why are technological tools used in the design of engineered products?

to create precise drawings to communicate design features and for design accuracy with regard to form and fit

to create precise drawings for manufacturing

to evaluate physical and functional expectations of a prototype or manufactured product

to verify physical and functional specifications of a prototype or manufactured product

to record, organize, and manipulate data obtained through product evaluations

to provide valid feedback for design or material changes

to provide tools for sound guidance in product design

to entertain engineers because they like to use sophisticated tools

Special Notes:

Note the requirements to download software for the Basics of Engineering Design Software lesson. This takes several days.

Also, preview the Design Challenge because common household materials are required.

Module Lessons Preview

In this module, we will study the following topics:

Troubleshooting and Evaluation.jpg Design Challenge.jpg

Precision Measurement.jpg Basics of Engineering Design Software.jpg

3D printing workflow – technology for additive manufacturing for layering material to create an object.

Accuracy – refers to how close a measured value is to the accepted value.

ASTM – American Society for Testing and Materials – develops standards for testing equipment.

Calibration – the act of verifying and or aligning a precision instrument to maintain instrument accuracy. Often this is verifying that an ‘0’ reading is actually set to read ‘0’.

Caliper - a measuring instrument with adjustable jaws to measure physical dimensions of parts.

Computer Aided Design (CAD)- software and hardware technologies that create and evaluate a proposed engineered solution through 3D modeling which is tested for engineering analysis, and then manufacturing suitability with proposed cost.

Computer Aided Engineering (CAE) - the computer driven process to drive the proposed design solution through the product design phase into product development and ultimately into manufacturing.

Computer Aided Manufacturing (CAM) - software and hardware technologies for part creation and physical evaluation.

Computer Numerical Control (CNC) – technology for subtractive manufacturing and creation of toolpath for multi-axis milling, lathe, or cutting with multiple axis contour to create an object.

Data Acquisition System - a computer driven system to measure and report electrical, temperature, pressure, sound, or other non-physical data of a device or system for evaluation during real world testing.

Micrometer – an instrument, often called screw gauge, used for precise measurement of machined components and other items created in mechanical engineering.

Parametric Engineering Design – solid modeling (3 Dimensional) of an engineering part or assembly created through computer software that is mathematically and geometrically based to be adaptive to changes in dimensions and other modifications. This platform allows computer generated testing of features and ease for manufacturability.

Precision – describes how close together a series of measurements are to each other. An instrument is precise if it yields consistent reproducible results.

Precision Measurement - a term used to describe instruments and tools that are highly accurate where precision is required for the product.

Reliability – instrument reliability is knowing that the instrument provides the same results in the same condition every time it is used.

Significant figures – the digits in a number that are important for precision in measurement.

Tolerance – the amount of something can vary from its specified design weight, dimensions, concentration etc.; Often used in machined pieces.

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