遼字石油化工大學⊙ Instructional objectives 5. Understand the generation and conduction of cutting heat, the measurement of cutting temperature. Master the main factors affecting the cutting temperature. Understand the cutting fluid. Master the influence of cutting temperature on the workpiece tool and the cutting process 6. Understand the form and reason of tool wear Understand the process of tool wear and blunt standards, the empirical formula of tool life, grasp the concept of tool life, tool life factors 7. Understand the machinability of metals and master the selection principle of cutting parameters5.Understand the generation and conduction of cutting heat, the measurement of cutting temperature. Master the main factors affecting the cutting temperature. Understand the cutting fluid. Master the influence of cutting temperature on the workpiece tool and the cutting process. 6.Understand the form and reason of tool wear. Understand the process of tool wear and blunt standards, the empirical formula of tool life, grasp the concept of tool life, tool life factors. 7.Understand the machinability of metals and master the selection principle of cutting parameters. Instructional objectives