Lectures 5-6 Processes

Question 1

Few disadvantages of creating a product out of one piece

Answer 1

• Storage is difficult
• Repair and replacement can be difficult
• Complex design
• Inefficient use of materials
• Transporting is difficult

Question 2

What determines the selection of a joining process

Answer 2

• The materials being similar or dissimilar

Question 3

Adhesives and solder require the surfaces for joining to be ——

Answer 3

wettable

Question 4

When parts are to be joined what must be considered on the melting and heating temperatures of the materials?

Answer 4

• The upper limit
• Degradation when heated

Question 5

Example of mechanical fastening

Answer 5

Riveting

Question 6

Example of permanent joining

Answer 6

Welding

Question 7

Example of adhesive bonding

Answer 7

Gluing

Question 8

Three categories of joining methods

Answer 8

1. Mechanical fastening
2. Permanent joining
3. Adhesive bonding

Question 9

Mechanical assembly methods are useful because…. (2)

Answer 9

• Ease of assembly
• Ease of disassembly

Question 10

A fastening method that allows for easy disassembly

Answer 10

Threaded fasteners

Question 11

Screws and bolts are threaded ——

Answer 11

externally

Question 12

A nut is an —– threaded fastener

Answer 12

internally

Question 13

When the second head is formed on a rivet, what is that process carried out on the metal called?

Answer 13

Upsetting

Question 14

4 positives of rivets

Answer 14

• High production rates
• Simplicity
• Dependability
• Low cost

Question 15

Three tooling methods for rivets

Answer 15

• Impact
• Steady compression
• Impact and steady compression combo

Question 16

DFA is

Answer 16

design for assembly

Question 17

When DFA, what two things should you aim to do

Answer 17

• design with as few parts as possible
• design remaining parts so they are easily assembled

Question 18

Is quality control a positive or negative for fasteners? Why?

Answer 18

Postive, allows for easy inspection and QC checks during assembly process

Question 19

Faying surfaces are

Answer 19

the surfaces of the two parts that are in contact at a weld

Question 20

Welding can be carried out through the use of —– or ——

Answer 20

heat, pressure

Question 21

In welding, what may be added to facilitate coalescence?

Answer 21

A filler

Question 22

Welding does not allow for ——- ——-

Answer 22

convenient disassembly

Question 23

Welding is a dangerous process because

Answer 23

they involve high energy and uses electric current

Question 24

Welding can reduce the strength of of the joint due to….

Answer 24

difficulty in seeing or detecting quality defects below the surface

Question 25

A fillet weld is

Answer 25

when the weld is beside the two parts that are being welded together

Question 26

A groove weld is

Answer 26

when the weld is between the two parts that are being welded