Question
Download Solution PDFWhich of the following roughness grade numbers indicates the roughness value as 6.3 ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Roughness:
- The irregularities in the surface texture result from the inherent action of the production process.
- These will include traverse feed marks and irregularities within them.
- The roughness value of grade N1 is 0.025 microns.
- When components are produced either by machining or by hand processes, the movement of the cutting tool leaves certain lines or patterns on the work surface.
- This is known as surface texture.
- These are, in fact, irregularities, caused by the production process with a regular or irregular spacing which tends to form a pattern on the workpiece.
|
Roughness Values, |
Roughness grade number |
Roughness Symbol |
|
50 |
N 12 |
∼ |
|
25 |
N 11 |
∇ |
|
12.5 |
N 10 |
|
|
6.3 |
N 9 |
∇∇ |
|
3.2 |
N 8 |
|
|
1.6 |
N 7 |
|
|
0.8 |
N 6 |
∇∇∇ |
|
0.4 |
N 5 |
|
|
0.2 |
N 4 |
|
|
0.1 |
N 3 |
∇∇∇∇ |
|
0.05 |
N 2 |
|
|
0.025 |
N 1 |
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