MEC 322 Study Guide - Final Guide: Cemented Carbide, Stainless Steel, Tungsten Carbide

• School: Ryerson University
• Department: Mechanical Engineering
• Course: MEC 322
• Professor: Vincent Chan

Document Summary

Mec 322 final exam review chip theory, cutting temperatures, cutting tool. Machining material removal by a sharp cutting tool: turning, milling, drilling. Abrassive process material removal by hard abrasive particles: grinding. Machinging shear deformation of work material (positive and negative rake angles) Good dimensional accuracy and surface finish final shape. Rouching remove metal (large amounts) then finishing final shape. Serrated chip high interface pressure plowing around tool. Associated with difficult to machine metals at high cutting speeds. 98& of the energy in machining is converted into heat. Causes chip temperature to be very high. Issues reduce tool like hot chips pose hazard to operator: causes inaccuracies due to thermal expansion. Taps used at low speeds heat generation not a concern. Hss have the best toughness of most tool material. Price is good indicator of mose tool material. Carbides cutting three to 5 times faster than hss. As grain size increases, hardness and hot hardness decreases, but toughness increases.