Surface Roughness Standards Set with Ra0.05-12.5um 30 Specimens GB6060.2-2006
Introduction
The parameters of surface roughness and their values are applicable to the assessment of machined surface quality, and can also be used in the development of machining process protocols and the design of moulds and dies.
As standardized in ISO2632/1-1975.
This set contains standards for the six most important maching methods in the prevalent ''AA''values. These surface roughness is used to compare and determine the degree of the surface finish by comparision method and eye esimation or magnifying glass. The surface rough contrast blocks is made of 45 carbor stool except the GCr15 which is using to plat lapping the sample block.
All 30 speciments are calibrated in u ''AA(Arithmetical average) and in the metric equivallents um Ra.
Classify and rough degree parameter as table.
Processing Method
|
Specifications
|
Ra Value um
|
Number of Blocks
|
National Standard
|
Lathe
|
Notebook sample block
|
0.4/0.8/1.6/3.2/6.3/12.5
|
30 pieces
|
GB6060.2-2006
|
Vertical milling
|
0.4/0.8/1.6/3.2/6.3/12.5
|
|||
Flat milling
|
0.4/0.8/1.6/3.2/6.3/12.5
|
|||
Flat grinding
|
0.05/0.1/0.2/0.4/0.8/1.6
|
|||
External grinding
|
0.2/0.4/0.8/1.6
|
|||
Grinding
|
0.1/0.05
|
Parameters
In the generic ‘AA’ value, the notebook block contains block standards for six important machining methods. All 30 samples are calibrated in U’ AA (arithmetic average) and in the metric system equivalent to umRa. The range of surface roughness comparisons is based on the data in the table below:
Lathe
|
Planing machine
|
Flat milling
|
Flat grinding
|
External grinding
|
Grinding
|
||||||
um
|
uin
|
um
|
uin
|
um
|
uin
|
um
|
uin
|
um
|
uin
|
um
|
uin
|
12.5
|
500
|
12.5
|
500
|
12.5
|
500
|
1.6
|
63
|
1.6
|
63
|
|
|
6.3
|
250
|
6.3
|
250
|
6.3
|
250
|
0.8
|
32
|
0.8
|
32
|
|
|
3.2
|
125
|
3.2
|
125
|
3.2
|
125
|
0.4
|
16
|
0.4
|
16
|
|
|
1.6
|
63
|
1.6
|
63
|
1.6
|
63
|
0.4
|
8
|
0.2
|
8
|
|
|
0.8
|
32
|
0.8
|
32
|
0.8
|
32
|
0.1
|
4
|
|
|
0.1
|
4
|
0.4
|
16
|
0.4
|
16
|
0.4
|
16
|
0.05
|
2
|
|
|
0.05
|
2
|