Superabrasive specifications:
|
Material |
Specification |
Surface in Ra |
Surface in CLA |
| HSS |
3B46 Q3VC150 |
0.15 |
6.3 |
| HSS |
3B64 Q3VC150 |
0.2 |
8 |
| HSS |
3B76 Q3VC150 |
0.3 |
12.5 |
| HSS |
3B91 Q3VC150 |
0.4 |
16 |
| Tungsten carbide |
1D64 P5VC100 |
0.2 |
8 | | |
Ordering data: grinding wheel dimensions
|
Type |
Ø D |
Thickness "T" |
Bore "H" |
Radius "R" |
Rim "X" |
|
1Q1 |
150 |
12 |
50 |
According to specific need |
According to specific need | | |
This type of centerless grinding is a creepfeed process in which the full depth of material to be ground off is removed in one single pass. The specific material removal rate Qw’ (mm3 per mm wheel width per second) is very high in this process but does depend on the thickness of the workpiece shaft diameter D. The following graph illustrates the ratio between material removal rate and workpiece shaft diameter.
|
To calculate Qw’ for this process, the following formula is used:
(D2- d2) *(p/4) * vf
D = Workpiece blank shaft diameter
d = final ground diameter
vf = traverse feed rate in mm/sec.
|
Achievable feed rate values vf are given in the table below:
| final ground diameter |
Traverse feed rates for workpiece blanks Ø 3 to Ø 10mm |
| ØD10mm |
ØD8mm |
Ø6mm |
Ø4mm |
Ø3mm |
| Ød 1mm |
0.120 |
0.120 |
0.210 |
0.340 |
0.460 |
| Ød 2mm |
0.130 |
0.130 |
0.230 |
0.430 |
0.740 |
| Ød 3mm |
0.135 |
0.140 |
0.280 |
0.73 |
|
| Ød 4mm |
0.140 |
0.160 |
0.370 |
|
|
| Ød 5mm |
0.160 |
0.200 |
0.680 |
|
|
| Ød 6mm |
0.190 |
0.280 |
|
|
|
| Ød 7mm |
0.240 |
0.520 |
|
|
|
| Ød 8mm |
0.340 |
|
|
|
|
| Ød 9mm |
0.640 |
|
|
|
| | |
