Unformatted text preview: give the same values than the standards of design of ball bearings. This UR parameterized clearance domain can then be used in a Computer Aided Tolerancing software (mock up in [Fukuda et al.2003]) in order to take into account the use of the system. As the domain concept is not a geometric object and the zone concept is easy to manage for a designer we propose to show on 3D the equivalent zone to each domain. Figure 5 Clearance Domain and fitted zone of a Ball Bearing
In figure 5, the computed domain is shown in 2D (dots) and is fitted (lines). This approximate domain can be shown in the drawing like a plain bearing with a jr radial clearance equal to TyMAX and a la length equal to TyMAX/RzMAX . Then, in a tolerancing analysis, the designer can substitute a ball bearing to a parameterised plain bearing where Jr and la are calculated by a given UR and a corresponding domain. In figure 6, the force domain is linked to the clearance domain of a joint in order to show that a small displacements torsor is a force torsor out of the nil UR domain. A UR>0...
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- Spring '10
- The Land, ........., Computer-aided design, Joseph K. Davidson, M. GIORDANO