4500 HW1 Questions and Answers

4500 HW1 Questions and Answers - University of...

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University of Missouri-Columbia Department of Mechanical & Aerospace Engineering MAE 4500: MANUFACTURING METHODS Fall 2015 Due on September 15, 2015 Assignment # 1 REMINDER: Make engineering quality sketches. Show step by step calculations following the class examples. Q. 1 Analysis of Dimensional Accuracy. An assembly consists of housing A, spacer S, bearing B, and stepped shaft C as shown in Fig.1. The stepped shaft has to rotate freely inside the bearing. The bearing needs to be accurately positioned inside the housing above the spacer. The bearing should not be allowed to rotate inside the housing. Design the assembly by conducting the following steps: (a) Select a suitable type of fit (Class 3) for the sub-assembly (stepped shaft and bearing), determine the basic sizes and tolerances for the shaft and the bearing inside diameter, then conduct allowance analysis. (b) Select a suitable type of fit (Class 3) for the bearing-housing sub-assembly and provide basic dimensions and tolerances for bearing outside diameter and housing inside diameter, then conduct allowance analysis from checking the accuracy of your design.
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