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Unformatted text preview: ) The determination of the kinematic and static tip errors are presented in Sections 3.1 and 3.2. Assuming small vibrations and deflections, the dynamic factors are assumed to be negligible. Also, assuming that this analysis is performed in the cold state, thermal effects are neglected. Although the worst case tolerance analysis method is used, Utip can also be found using the root sum square (RSS) method. 3.1. Kinematic Analysis Positional and geometric errors in the tip, U tip , cause dimensional errors in the drilled hole. Errors in the KPC’s are influenced by the orientation and position of the centreline of the tip (Figure 2) and the thicknesses of the components of the drill’s structure. The first two factors are functions of the horizontal and vertical gap between the hub and the gear, H gap and Vgap , which are created by removal of a sacrificial oxide layer during surface micromachining. Although translational effects of the gear in the spacing can have some influence, this error analysis assumes that the gear is in...
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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.
- Spring '10
- The Land