3.9 Metal Removal, Dimensional Chains and Economic Tolerance,3.9.1 Concept of metal removal,The whole thickness of this removed metal layer is called the total metal removal, and the metal removed in each operation is called operation removal. The relationship between total metal removal Zt and each operation removal Zi is easily established, which is, here, n is the number of jobs or sub-jobs for the surface. The rate of metal removal directly influences the machining quality, production effici
