11 - Accuracy in design and manufacture Flashcards
1
Q
What is measuring?
A
The process of using tools such as rules to check existing dimensions
2
Q
What is marking out?
A
- The transfer of designs on to materials or parts that are being manufactured to indicate the position of certain design features
3
Q
What is a datum?
A
- Reference surface or edge from which measurements are taken to improve accuracy
4
Q
What is a tolerance?
A
The acceptable range of accuracy
5
Q
What is a template?
A
- Rigid shape or pattern to transfer a design on to a work piece
6
Q
State 4 different methods to eliminate errors in manufacture?
A
- Dials on manual machines#
- Digital test gauges
- Profile projectors
- CNC machines
7
Q
How do dials on manual machines eliminate errors in manufacture?
A
- Allow precision control of tools and work pieces
8
Q
How do Digital test gauges eliminate errors in manufacture?
A
- Provide very accurate measurements
- Will often be linked with a computer
9
Q
How do Profile projectors eliminate errors in manufacture?
A
- Measure fine details to an accuracy of 0.015 mm
10
Q
How do CNC machines eliminate errors in manufacture?
A
Use computer codes to control their movement and ensure accuracy
11
Q
What are 3 methods of increasing consistency in manufacture?
A
- Jigs
- Fixtures
- Templates
