Theory of Metal Cutting Lab
Description
Description: This virtual laboratory introduces engineering students to the theory of metal cutting through the orthogonal cutting model, a simplified two-dimensional representation used to analyze the mechanics of machining. Students interact with a live, adjustable cutting diagram to explore how rake angle and clearance angle shape chip flow, then work through a connected chain of calculators covering chip thickness ratio, shear plane angle, shear strain, the forces acting on the chip and tool, coefficient of friction, and the Merchant equation relating tool geometry to shear plane angle. The lab also covers the four basic chip types and their relationship to work material and cutting conditions, power and energy relationships in machining, and cutting temperature prediction using Cook's equation. Values calculated in earlier steps automatically carry forward through later calculators, letting students trace a single cutting problem from raw chip measurements all the way through to cutting power and tool-chip interface temperature, reinforced throughout with fully worked examples and practice problems drawn directly from the course material.
Learning Outcomes
By the end of this lab, students will be able to describe the orthogonal cutting model and identify the role of rake angle and clearance angle in tool geometry; calculate chip thickness ratio, shear plane angle, and shear strain from measured cutting data; identify and distinguish between discontinuous, continuous, continuous-with-BUE, and serrated chip types based on work material and cutting conditions; resolve and calculate the forces acting on the chip and tool, including cutting force, thrust force, shear force, and friction force, and relate them through the Merchant circle; apply the Merchant equation to predict how rake angle and friction angle affect shear plane angle, cutting energy, and temperature; and calculate cutting power, specific energy, and cutting temperature for a given machining operation using standard reference data and Cook's equation.