Influence of the cutting edge radius on surface integrity in hard turning of roller bearing inner rings

Denkena, Berend; Grove, Thilo; Maiß, Oliver

doi:10.1007/s11740-015-0615-x

Cited by 24 publications

(16 citation statements)

References 17 publications

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“…The residual stresses were measured with an X-ray diffractometer Seiffert XRD 3000 P using CrKa radiation. The experimental procedure and results are described in detail by Denkena et al [13,14].…”

Section: Machining Of Roller Bearings With Specific Residual Stress Dmentioning

confidence: 99%

Computational approach to improve bearings by residual stresses based on their required bearing fatigue life

Pape¹,

Maiß²,

Denkena³

et al. 2017

Int. J. CMEM

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In drive systems and component technology a high reliability is very important for machines. Machine element dimensions are calculated for reliability. The properties for these elements are based on conventional manufacturing techniques. Very high stresses are applied on bearings in their operating time. To improve the endurance life, residual stresses can be induced into the subsurface zone. In contrast to a conventional grinding process, the mechanical surface modification process deep rolling is able to induce very high compressive residual stresses. A computational approach was developed to establish an appropriate residual stress depth profile matching the applied loads. Thus, the costs of manufacturing can be chosen in accordance to the required properties. The method to determine the residual stresses is based on an iterative reverse calculation of an existing bearing fatigue life model of Ioannides et al. The model originates from the approach of Lundberg and Palmgren (1947) including a stress fatigue limit t u. For the term t i , the fatigue criterion of Dang-Van is applied. The equation accounts for the maximum orthogonal shear stress and the local hydrostatic pressure p hyd , corrected for residual and hoop stress. The inputs into the computational model are the stresses on the surface, which are simulated based on the load and geometry of the contact between roller and bearing surface. As an output the required residual stress profile underneath the bearings raceway is given to achieve a bearing fatigue life as required for the given application. In order to verify the model, the bearing fatigue life was experimentally determined for a given residual stress profile by experiments.

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Section: Machining Of Roller Bearings With Specific Residual Stress Dmentioning

confidence: 99%

Computational approach to improve bearings by residual stresses based on their required bearing fatigue life

Pape¹,

Maiß²,

Denkena³

et al. 2017

Int. J. CMEM

Self Cite

View full text Add to dashboard Cite

show abstract

“…6 Varela et al 22 observed that cutting edges with combined chamfer and hone produce higher compressive residual stress at the workpiece surface in comparison to single honed tools, what was attributed to the significant plowing effect. Investigating the effect of different edge roundings on residual stress, Denkena et al 23 noted that an increase in edge radius causes an increase in maximum compressive residual stress and an increase in the affected subsurface zone. The authors affirm that this effect can be related to the increase in passive force, which causes high mechanical loads on the workpiece surface.…”

Section: Introductionmentioning

confidence: 99%

Influence of customized cutting edge geometries on the workpiece residual stress in hard turning

Ventura

Breidenstein

2017

Proceedings of the Institution of Mechanical Engineers, Part B:

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Depending on the intensity of mechanical and thermal loads during hard turning, compressive and/or tensile residual stress can be obtained. However, only compressive residual stress contributes to avoid crack initiation and propagation and increase fatigue life. In order to induce compressive residual stress in the workpiece surface and subsurface, cutting edge geometry is one of the most important influence factors. Taking this into account, the influence of new customized cutting edge geometries on the parameters of a hook-shaped residual stress profile (typical of a hard turning process) is investigated and possible causes for the encountered phenomena are explained. It was found that edge geometries, which provide an increase in contact length between tool and workpiece, lead to higher compressive residual stress in the subsurface and deeper affected zones.

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“…The results revealed that the tiny grooves, severe plastic flow, and extensive material flows at lower feeds have significant influence on the surface integrity. Denkena et al [12] studied the effect of cut ting speed, feed and cutting edge radius on the surface integrity in terms of the surface roughness, residual stress, and microstructure and hardness by summarizing overview to identify the optimal parameter value and improve the endurance of roller bearings. Domenico et al [13] explored the effects of different cooling con ditions on white layer.…”

Section: Introductionmentioning

confidence: 99%

Correlation between edge radius of the cBN cutting tool and surface quality in hard turning

Zhao

Agmell

Persson

et al. 2017

J. Superhard Mater.

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cBN cutting tools with superior mechanical properties are widely used in machining various hard materials. The microgeometry of cBN cutting tools, such as the edge radius, has great influence on the surface quality of components and tool life. For optimized tool geometry, it is crucial to understand the influence of the cBN cutting tool microgeometry on the machined surface quality. In this study, the attempt has been made to investigate the correlation between the cutting tool edge radius and surface qual ity in terms of the surface roughness and subsurface deformation through a FE simulation and experiment. Machining tests under different machining conditions were also conducted and the surface roughness and subsurface deformation were measured. Surface roughness and subsurface deformation were produced by the cutting tools with different edge radii under various cutting parameters. Both results from the FE sim ulation and machining tests confirmed that there was a significant influence on the surface quality in terms of both the surface roughness and subsurface quality from the edge radius. There is a critical edge radius of cBN tools in hard turning in terms of surface quality generated.

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Influence of the cutting edge radius on surface integrity in hard turning of roller bearing inner rings

Cited by 24 publications

References 17 publications

Computational approach to improve bearings by residual stresses based on their required bearing fatigue life

Computational approach to improve bearings by residual stresses based on their required bearing fatigue life

Influence of customized cutting edge geometries on the workpiece residual stress in hard turning

Correlation between edge radius of the cBN cutting tool and surface quality in hard turning

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