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cbn grinding wheel for crankshaft
cbn grinding wheel for crankshaft
cbn grinding wheel for crankshaft

Vitrified CBN Grinding Wheel for Crankshaft

CBN grinding wheel: grinding crankshaft

Model : 1A1 CBN wheel

Wheel speed is generally 80m/s-120m/s

High precision and good surface quality
High adhesion strength
Excellent performance
Reduced grinding forces
Easy dressing


Product Details

Description of cbn grinding wheel for crankshaft
A crankshaft is made up of Main bearings, Pin bearings and Crank webs. A completely smooth journal is essential for motor efficiency during piston ignition of an engine.

Vitrified CBN grinding wheel are remarkable for preventing grinding burns to the shoulder of the Crankshaft. CBN Grinding Wheel For Crankshaft can equip with various high precision CNC Crankshaft Grinding Machines, Suitable for high efficient,heavy grinding of Crankshaft pin grinding,Journal grinding.The wheel speed is generally 80m/s-120m/s.

Solutions for Crankshaft Grinding
Moresuperhard can provide vitrified CBN grinding wheel and vitrified aluminium oxide grinding wheel,  Electroplated CBN Wheel for rough,semi-finish and finishc  grinding crankshaft.
A type of innovation with the grinding wheels, the crankshaft grinding wheels finds its usage in the different automotive, truck, diesel, aircraft, and small engine manufacturing industry and also in the various engine rebuilding firms that are used to regrind the pins and the bearings.
crankshaft grinding wheel

– Main Bearing and Crankpin Journals Grinding with vitrified CBN grinding wheel
Cubic boron nitride (CBN) grinding wheels are used for high production machining of automobile crankshafts.

Applied material
* Cast iron: chilled cast iron, nodular cast iron, grey cast iron, alloy cast iron, etc
* Steel: 20Cr, GCr15, CF53, 45# steel, 55# steel, 80B high carbon steel, etc
Benefits: Long dressing interval = Long tool life, Consistent surface finish and high profile stability, Reduced thermal and mechanical damage to workpiece
Crankshaft Grinding Machines:Ntc, Toyoda, Landis, Mikrosa, Junker, Schaudt, Emag, etc
cbn grinding wheel for crankshaft

 

– Main Bearing Grinding with Vitrified Aluminum Oxide Wheel
When producing small lots or machining larger crankshafts (for trucks and ships), grinding wheels with aluminium oxide abrasives are used.
Benefits of Moresuperhard Vitrified Aluminum Oxide Wheel
-The evenness of hardness and balance performance of the wheels are 30-50% higher than that of China State Standard.
– The thickness deviation of a group of the wheels is not more than 0.2mm.
– The parallel tolerance of two ends is not more than 0.1mm.
Cubic boron nitride (CBN) grinding wheels are used for high production machining of automobile crankshafts
crankshaft grinding

Rough Grinding Main Bearing and Crankpin with Electroplated CBN Wheel
A pin chasing process with electroplated CBN wheels is used for the roughing of the main and in particular the pin bearings of a crankshaft.
electroplated cbn wheel for crankshaft grinding

Finish Grinding FLANGE and POST GRINDING
Finish grinding with vitrified bonded aluminium oxide or vitrified cbn wheels.During cylindrical grinding operations for the flange and post it is possible to use different specifications depending on the requirements of the respective contact zones.
cbn wheel for crankshaft grinding

Dressing and truing of crankshaft grinding wheels
The dressing and the truing of the grinding wheels: This is mainly done in order to restore the original cutting geometry and to make a final product which is flatter and round. The grinding wheels get their flatness and roundness from the dressing and truing of the grinding wheels.

Drawing&Specification

1a1 grinding wheel

Model D (mm) T (mm) H (mm) X (mm)
1A1  

 

500

20 203 5 8 10
1A1 22 203 5 8 10
1A1 19.5 203 5 8 10
1A1  

 

600

35 132 5 8 10
1A1 19.8 132 5 8 10
1A1 20.5 132 5 8 10
1A1  

 

 

650

40.5 132 5 8 10
1A1 43.5 132 5 8 10
1A1 44.5 132 5 8 10
1A1 50.5 132 5 8 10
14A1  600 35 132 5 8 10
14A1  650 38.6 254 5 8 10
Special size can be designed according to your requirement.

 

The case of Vitrified CBN Grinding Wheel for Crankshaft

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

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