ME 366 Study Guide - Midterm Guide: Angle, Machine Tool, Machinability
Document Summary
Why machining is important: provides final part, variety of part shapes and special geometry features that other processes can"t create, good dimensional accuracy and surface finish. Turning) point usually rounded to form nose radius. Drilling, milling) motion relative to work, usually by rotating: basic tool geometry. Single point tool has showing rake face, flank, and tool point. Multiple cutting edges would be helical milling center. Three dimensions: cutting speed(v) - primary motion, feed(f) - second motion, depth of cut(d) penetration of tool below original work surface. Material removal rate: for certain operations, mrr= vfd. Roughing removes large amounts of material from starting part; high feeds and depths and low speeds: finishing completes part geometry; low feeds and depths and high speeds. Low cutting speeds and large feed and depth of cut. High cutting speeds and small feeds and depths. Low tool-chip friction: continuous w/ built-up edge. Tool-chip friction causes portions of chip to adhere to rake face.
