Manufacturing Processes And Techniques 2

Question 1

3D printing - orientation

Answer 1

• layering method can cause weakness and may snap under load so re-orienation of part could avoid this
• overhanging parts require scaffolding and this adds time and costs to make and remove, by rotating, this can be avoided

Question 2

3D printing - remove visible layers

Answer 2

• spray paint
• sanding in small circular movements
• acetone vapour

Question 3

tolerance meaning

Answer 3

specifies the range of sizes over which the part would be acceptable

Question 4

measuring instruments: vernier calliper

Answer 4

• +- 0.02 mm
• for external/internal measurements
• can be manual or digital

Question 5

measuring instruments: micrometer

Answer 5

• +-0.005mm

- you add the large reading to the one around the circle (45 -> 0.45)

Question 6

measuring instruments: dial gauge

Answer 6

• +- 0.005

- measures movement of a surface e.g. the bumps in a circle

Question 7

other measuring instruments:

Answer 7

• multimeter - voltage and current

- oscilloscope - measures signals and waveforms