529 534 wittwer et al 2002 wittwer j w gomm t howell

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Unformatted text preview: Rhub and L are illustrated in Figure 2. 282 A. Bryan et al. Figure 3 Drill tip errors. k In addition to affecting the location, U x also affects the run-out of the desired hole. k k U y determines the error in the drill depth of the hole. Since θ is small, U y can be considered to be negligible. 3.2. Static Analysis The static analysis is used to determine the effect of loads on the orientation of the tip. The geometric assumptions made for the kinematic analysis are assumed to apply to the static analysis. Several additional assumptions are made in order to perform the quasistatic analysis of the dynamic drill system. The drive gear is assumed to apply tangential and radial forces (Ft and Fr) on the load gear. Ft causes the rotation of the system and would not contribute to stresses and deflections. Since the load gear rotates about a stationary hub, the radial forces (Fr) are assumed to be balanced by a side load (Rr) acting on the base of the tip (Figure 4 (a)). This side load causes the deflection of the gear, platform and tip from nominal as drilling occurs. In order t...
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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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