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