Vitrified CBN Grinding Wheel for Journal (Diesel engine)
| Application parameters | |
| Work piece | Truck crankshaft:
End face ø90.4mm/Journal outer circle ø74mm |
| Material | 42CrMoA, HRC 52-58 |
| Machine | NAXOS UNION |
| Grinding parts | Journal end face, rounded corners and outer circles |
| Cooling fluid | Oil |
| Grinding way | Cut into the mill |
| Grinding wheel | 1VG1L1 650- -39.6- -6- -3.5 NB151 |
| Dressing wheel | CNC electroplating dresser roller SG 71P-150-1.2 |
| Grinding parameters | Linear speed Vc=95m/s |
| Grinding allowance:
outer circle ae = ø1.2mm, end face ae = ø0.5mm |
|
| Maximum feed speed Vfa = 20 mm/min | |
| Dressing parameters | Linear speed VR=85m/s |
| Dressing quantity aed=15*2+ 1 * 2 um | |
| Dressing speed ratio qd= + 0.89 | |
| Grinding performance
|
Maximum material removal rate Q’wmax = 94.7mm³/mms |
| Grinding time TG = 10 min (40% efficiency improvement) | |
| Dressing frequency
mT=210 journal/Dressing(50%life improvement) |
|
| Roughness Rz<4.5um | |
