This preview shows page 1. Sign up to view the full content.
Unformatted text preview: al tolerances taken from the first section of table I, we obtain a corresponding contribution chart, again shown in table I. In this example, we used the equation (4) to obtain the contributors tolerances. According to the fourth column of Re-Design of Mechanical Assemblies for Tolerance Analysis 103 table I (in section 1), the FR1 calculated is ±0.7513. This value is much more stringent than the designer specification of ±1mm. Therefore we need to change the tolerances in the dimensional chain to respect that. In this case, efforts are being focused at the lesser value (6.66%) in the contribution chart, so as to make its contribution more significant. In the first section of table I, the smaller contributors correspond to FE4. Consequently, its tolerance will be increased in an objective to decrease the cost of the assembly. Therefore the tolerance tg of 0.1 will be replaced by 0.2 and the step 4 will be executed to obtain a new value of ±0.8013 for FR. This value is still significantly below the ±1mm objective targeted for FR by the de...
View Full Document
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