E internal clearances of a ball bearing of the

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Unformatted text preview: ofiles of the pieces under contact. The model will be no t described in this paper but a good presentation of the method is proposed in the book written by Hills et al. [Hills et al., 1993]. A normal load of 10000 N has been considered for that purpose. The calculations have been performed for the nominal geometry of the cam roller (curvature C = 5 μm) and the extreme cases (these values were rounded to 2.5 and 7.5 μm). The maximum contact pressure and the axis a and b of the contact area are first determined. Equivalent Stress 300 (MPa) 250 200 150 100 50 0 0.0 0 .5 Curvature 2.5 μm Curvature 5.0 μm Curvature 7.5 μm 1 .0 1.5 2.0 2 .5 59 MPa depth (mm) 3 .0 Figure 12; Effect of the geometrical uncertainty on the equivalent stress The size of the contact area decreases when the roller curvature increases (figures 10 and 11). In consequence, the maximum value of the ellipsoidal contact press ure rises (figure 11). The stress field is then calculated using previous results. The equivalent st...
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This note was uploaded on 08/03/2010 for the course DD 1234 taught by Professor Zczxc during the Spring '10 term at Magnolia Bible.

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