ME 270 Study Guide - Final Guide: Google Scholar, Mechanical Efficiency, Vise

• School: University of Illinois
• Department: Mechanical Engineering
• Course: ME 270
• Professor: Leon Liebenberg

Document Summary

Attempt as many problems as possible by yourself, i. e. before looking at the answer / solution. The answers or abbreviated solutions to the problems are shown after each question. Some of the questions might require you to do independent research using an online search engine (e. g. google, or google scholar). A dull tool is one having an increased tip radius. As the tip radius increases (i. e. , as the tool dulls) the cutting force increases since the effective rake angle is now decreased. Shallow depths of cut may now not be possible. Another effect is the possibility for surface residual stresses, tearing, and cracking of the machined surface, due to severe surface deformation and the heat generated by the dull tool tip rubbing against this surface. Explain why and how they influence the cutting operation. (discussed in class. : give reasons that pure aluminum and copper are generally considered to be easy to machine.