Chapter 5: Machine Shop Estimation – Turning Operations
Abstract : To estimate turning operations, you'll need to consider parameters like cutting speed, feed rate, depth of cut, and spindle speed , which are crucial for determining cycle time and material removal rate. Here's a breakdown of the key aspects: 1. Cutting Speed (V): Definition: The velocity of the workpiece surface relative to the cutting tool. Units: Often measured in surface feet per minute (SFM) or meters per minute (m/min). Calculation: V = (π * D * N) / 1000, where D is the workpiece diameter in mm and N is the spindle speed in RPM. 2. Feed Rate (f): Definition: The distance the cutting tool moves relative to the workpiece during one revolution of the spindle. Units: Typically measured in inches per revolution (IPR) or millimeters per revolution (mm/rev). Feed rate is also calculated as: Cutting length per minute divided by the spindle speed (RPM). 3. Depth of Cut (d): De...