Notes

Question 1

Pugh’s controlled convergence

Answer 1

compare concepts to a datum to give a qualitative result.

Question 2

Method 635

Answer 2

6 people write 3 rough solutions and pass then round the other 5 and enter 3 developments down for each

Question 3

Function Structure

Answer 3

a representation of the functions and sub-functions of the system in terms of flow of energy materials and signals in a block diagram

Question 4

Design Methodology

Answer 4

The theory of procedures for solving design problems which are intended to be valid for all types of engineering design

Question 5

weighting and rating method

Answer 5

concepts are quantitatively evaluated against criteria from the product spec

Question 6

selection matrix

Answer 6

first column lists the constraints and requirements while the rows have the solution principles

Question 7

combination matrix

Answer 7

the first column has the verb-noun phrases from the function structure and the rows contain solution principles

Question 8

detail design

Answer 8

lays down the final form arrangement dimensions and materials of all individuals parts

Question 9

embodiment design

Answer 9

determines the layout and forms and develops the artefact in accordance with technical and commercial considerations

Question 10

concept design

Answer 10

involves the establishment of functions structures for the search of solution principles and their combination into design variants

Question 11

solution neutral statement

Answer 11

a statement of what the product is to do without specifying how it is to do it

Question 12

clarification of task

Answer 12

functions and constraints are documented in a detailed design spec

Question 13

4 types of drawing

Answer 13

Perspective has a vanishing point
Isometric has all three axis at 120 degrees
Orthographic is used in detail design
Oblique has the x and y axis at 90 degrees

Question 14

purpose of an engineering drawin

Answer 14

describe the part required by the designer
manufacturing instruction
enable to part to be inspected

Question 15

lathe

Answer 15

rigid machine tool that removes material from a rotating work piece

Question 16

Turning

Answer 16

The work piece is rotated and the tool moves in one plane

Question 17

boring

Answer 17

internal turning by a cylindrical hole is formed

Question 18

drilling

Answer 18

carried out using a fluted cutting tool with cutting edges at the tip

Question 19

reaming

Answer 19

carried out using a cutting tool with the cutting edges down the shank

Question 20

Milling

Answer 20

the work piece is clamped to movable table and the tool is rotated

Question 21

grinding

Answer 21

abrasive metal removal

Question 22

spinning

Answer 22

a round sheet and mandrel are rotate in contact with each other

Question 23

deep drawing

Answer 23

a punch pushes a sheet into a die forming a cup

Question 24

Springback prevention

Answer 24

overbending

Question 25

Fine blanking

Answer 25

a grip ring prevents the movement of the sheet so clearance can be reduced

Question 26

rotating load

Answer 26

radial load rotated so all points of bearing are loaded in one revolution

Question 27

stationary load

Answer 27

radial load rotated at the same speed as the bearing so the load only acts on one part of the bearing

Question 28

rolling bearings

Answer 28

use spherical cylindrical and tapered rolling elements as well as lubrication

Question 29

pitch circle

Answer 29

the theoretical circle midway between the addendum and dedendum

Question 30

module

Answer 30

the ratio of the pitch diameter to the number of teeth

Question 31

worm gears

Answer 31

allow ratios if 5:1 and 75:1 their efficiency can be 20%

Question 32

double helical gears

Answer 32

create less axial thrust than helical gears

can take higher ratios speeds and axial loadss