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Vitrified CBN Grinding Wheel for Crankshaft

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Product Details

Description of vitrified cbn wheel for crankshaft grinding
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.
Advantages of vitrified bond cbn wheel
1.High precision & good surface quality
2.High adhesion strength
3.Excellent performance
4.Reduced grinding forces
5.Easy dressing

Solutions for Crankshaft Grinding

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.

 

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

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

Diameter

Hole

Thickness

inch

mm

inch

mm

inch

mm

14’’

355

3’’

76.2

1/2’’. 3/4’’. 7/8’’ 

13, 19, 22

16’’

405

3’’, 5’’

76.2, 127.0

3/4’’. 7/8 . 1’’

19, 22, 25

18’’

455

3’’, 5’’

76.2, 127.0

1’’. 1-1/8’’. 1-1/4’’. 1-3/4’’

25, 28, 32, 45

20’’

510

3-3/4’’, 6’’

95.25, 152.4

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’

19, 22, 25, 28, 32, 38

22’’

560

6’’

152.4

7/8’’. 1’’. 1-1/4’’. 1-3/4’’

22, 25, 32, 45

23’’

585

6’’

152.4

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’

19, 22, 25, 28, 32

24’’

610

8’’

203.2

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’

19, 22, 25,28, 32, 38, 45

26’’

660

8’’

203.2

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’

19, 22, 25,28, 32, 38, 45

28’’

710

6', 8’

152.4, 203.2

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’

19, 22, 25,28, 32, 38, 45

30’’

760

8', 12 ',17-3/4’’

203.2, 304.8, 450.8

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’

19, 22, 25,28, 32, 38, 45

32’’

810

8', 12’

203.2, 225.0, 304.8

3/4’’. 7/8’’. 1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’. 2’’

19, 22, 25,28, 32, 38, 45,50

36’’

915

12’

304.8

1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’. 2’’. 2-1/2’’

25,28, 32, 38, 45,50,65

40’’

1015

12’’

304.8

1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’. 2’’. 2-1/2’’

25,28, 32, 38, 45,50,65

42’’

1065

12’’

304.8

1’’. 1-1/8’’. 1-1/4’’. 1-1/2’’. 1-3/4’’. 2’’. 2-1/2’’

25,28, 32, 38, 45,50,65

50’’

1250

12’’

304.8

1-1/4’’. 1-1/2’’. 1-3/4’’. 2’’. 2-1/2’’

32, 38, 45,50,65

60’’

1500

12’’, 20’’

304.8, 508.0

1-1/2’’. 1-3/4’’. 2’’. 2-1/2’’

38, 45,50,65

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.

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.

                     

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 of vitrified cbn wheel

Shape

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

* other size can be customized

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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info@moresuperhard.com +86-371-8654-5906 +86 17324838957 Zhongyuan Rd, Zhongyuan District, Zhengzhou, China

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