Annals of the „Constantin Brancusi” University of Targu Jiu, Engineering Series , No. 2/2014

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CYLINDRICAL ROLLER BEARINGS MACHINED BY

ELECTRICAL EROSION

Prof.univ.dr.ing. MARCEL S.POPA, Technical University of Cluj-Napoca

Drd. Ing. IOAN BADIU, Technical University of Cluj-Napoca

ABSTRACT: Cylindrical roller bearings take heavy radial loads that can operate at high speeds.

They are manufactured in a wide variety of variants and sizes, especially with a row of rolls, and two

or more rows, the next roll or roll cages. In cylindrical roller bearings, rollers are guided by fixed

collar of one of the rings. In models with cage, collar ring with cage retained rollers can be extracted

from the other ring. Therefore, mounting and dismounting of bearings in the hub become much easier,

especially in those places where, due to the loading conditions are imperative need tight fits for both

rings.

KEY WORDS : radial bearings, tapered roller, electrical erosion, materials.

1.INTRODUCTION .

Cylindrical roller bearings are assemblies

consisting of a row outer rings, inner rings and

roller cages. Outer rings can be trimmed on

both sides and the interior have one or two

edges. The cage prevents the roller contact

during operation. Cylindrical roller bearings

are very rigid, have a high radial load capacity

and because the cage, are suitable for high

speeds. It is preceded by bearings have a

particular set of reels and are designed as the

maximum load bearing capacity. The camps

are dismantled, thereby facilitating assembly

and disassembly. Both bearing rings can be

fitted with interference fit. Cylindrical roller

bearings with cage row can be used as free

bearings, bearings and the bearings supporting

the ruling. Many types are provided in X-life

version. The quality of the X-life bearings have

rolling tracks with a smaller roughness and

accuracy in shape higher than the versions

without a comparable X-life. The

dimensioning identical capacity and lifetime of

these bearings is superior. In certain

embodiments, X-life bearings suspension can

be dimensioned at a lower overall.

2.EXPERIMENTAL RESULTS

FROM THE POCESSING OF

ELECTRICAL EROSION.

Fig. 1. Processing machine electrical erosion

AQ-750L.

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Fig. 2. Fig.2. The processing of bearings

circular orbits.

Fig. 3. Cylindrical roller bearings with cage.

Fig.4. The cylindrical roller radial bearings.

Fig. 5 The cylindrical roller radial

bearings SKF single row.

Fig.6. SKF The cylindrical roller

bearings NN type / NNU / NNUP.

Fig.7. Cylindrical roller bearings

SKF several times.

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Fig.8.The table parameters electrical

erosion.

Fig. 9. Graphic form of electrical erosion

parameters.

Fig. 10. The electrical erosion parameter

values.

Fig. 11. The connection between parameters

electric erosion.

Fig. 12. The electrical erosion parameter

values.

Fig. 13. The electrical erosion parameter

values.

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Fig. 14. 3D graphical shapes electrical erosion

parameters.

Fig. 15. Table containing the values parameters

of electrical erosion.

Fig. 16. Graphic shapes parameters electrical

erosion.

Fig. 17. The electrical erosion parameter

values.

Fig. 18. Table containing the values

parameters of electrical erosion.

Fig. 19. 3D graphical shapes the electrical

erosion parameters.

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Fig. 20. 3D graphical shapes the electrical

erosion parameters.

Fig. 21. 3D graphical shapes the electrical

erosion parameters.

Fig. 22. 3D graphical shapes the electrical

erosion parameters.

Fig. 23. Table Containing the values

parameters of electrical erosion.

Fig. 24. Table containing the values parameters

of electrical erosion.

Fig. 25. 3D graphical shapes the electrical

erosion parameters.

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Fig. 26. The electrical erosion parameter

values.

Fig. 27. 3D graphical shapes electrical erosion

parameters.

Fig. 28. Table containing the values parameters

of electrical erosion.

Fig. 29. 3D graphical shapes electrical erosion

parameters.

Fig. 30. 3D graphical shapes electrical erosion

parameters.

Fig. 31. Table containing the values parameters

of electrical erosion.

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Fig. 32. 3D graphical shapes electrical erosion

parameters.

Fig. 33. 3D graphical shapes electrical erosion

parameters.

Fig. 34. The electrical erosion parameter

values as 2D.

Fig. 35. The electrical erosion parameter

values as 2D.

Fig. 36. The electrical erosion parameter

values as 2D.

Fig. 37. The electrical erosion parameter

values as 2D.

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Fig. 38. The electrical erosion parameter

values as 2D.

Fig. 39. The electrical erosion parameter

values as 2D.

Fig. 40. 3D graphical shapes the electrical

erosion parameters.

Fig. 41. 2D shape parameter for momentum as

a percentage.

Fig. 42. 2D shape parameter for momentum.

Fig. 43. 2D shape parameter for momentum

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Fig. 44. 2D shape parameter for momentum.

Fig. 45. 2D shape parameter for momentum as

a percentage.

3.CONCLUSIONS.

Cylindrical roller bearings with low friction

type LSL and ZSL are roller bearings single

row and corresponding series size 23. Bearings

have solid outer rings with two edges, inner

rings are made with a board. The inner ring is

detachable and thus facilitate mounting

bearings. Cages or intermediate spacers

prevent mutual contact between the rollers

during operation. Many types are provided in

X-life version. Bearings of X-life quality

runways with lower roughness and shape

accuracy higher than comparable versions with

X-life. The dimensioning identical capacity

and lifetime of these bearings is superior. In

certain embodiments, X-life bearings

suspension is scalable.

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