manufacturing processes

Question 1

what is the difference between additive and subtractive manufacture?

Answer 1

additive manufacture involves joining or building up materials. subtractive manufacture uses methods such as machining and carving which involve material removal.

Question 2

explain the importance of using modelling in the iterative design process

Answer 2

they save time, they avoid potentially expensive production problems occurring later in production, and it reduces the potential for mistakes

Question 3

what is a prototype

Answer 3

a functioning or non functioning pre-production design evaluation model.

Question 4

what is rapid prototyping

Answer 4

the use of machines such as 3D printers to product realistic 3D models from CAD files

Question 5

what is riveting

Answer 5

two pieces of metal are overlapped and drilled, a rivet passes through the holes and the end of the rivet shaft is then hammered over to join the sheets

Question 6

what is soldering

Answer 6

joins two or more metal components together by melting and flowing a metal filler material into the joint.

Question 7

what is brazing

Answer 7

involves a higher temperature than soldering. uses a brass filler rod and is used to join dissimilar metals such as mild steel sheet to aluminium and copper.

Question 8

what is welding, and give two examples of welding

Answer 8

joining metals via heat

• friction welding where a rapidly rotating component is pressed against a stationary component
• gas welding which uses a mixture of oxygen and acetylene

Question 9

what are knock down fittings

Answer 9

allows products to be assembled and disassembled many times without weakening the joint.