lecture_4_-_machining_operations_and_machine_tools_-_ch_22.20110127.4d41b82a2e8600.05002462

Lecture_4_-_machining_operations_and_machine_tools_-_ch_22.20110127.4d41b82a2e8600.05002462

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Unformatted text preview: Chapter 22 - MACHINING OPERATIONS AND MACHINE TOOLS: Turning and Related Operations Drilling and Related Operations Milling Machining Centers and Mill-turn Centers Gear cutting Broaching ME 350 Lecture 4 Chapter 22 Turning Single point cutting tool removes material from a rotating workpiece to generate a cylinder Performed on a machine tool called a: Variations of turning performed on a lathe: Facing Contour turning Chamfering Cutoff Gear Teach Machining Cutting edge cuts an angle on the corner of the cylinder, forming a " chamfer " Chamfering Tool is fed radially into rotating work at some location to cut off end of part Cutoff Tool is fed radially Facing Tool follows a contour that is other than straight Contour Turning Pointed form tool is fed at a large feed rate, thus creating threads Threading ool has the desired geometry, and is fed directly into workpiece Form Turning Engine Lathe Holding Workpiece in a Lathe Turret Lathe Tailstock replaced by turret that holds up to six tools Tools rapidly brought into action by indexing the turret Applications: high production work that requires a sequence of cuts on the part Multiple Spindle Bar Machines More than one spindle, so multiple parts machined simultaneously by multiple tools. Example: After each machining cycle, spindles (including collets and workb Power Requirement c c c P F v F U MRR vfd fd = = = the specific energy: Cutting power per unit volume removal rate Approximation: U ~Hardness H Converted to Specific Energy (U) For Cutting...
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Lecture_4_-_machining_operations_and_machine_tools_-_ch_22.20110127.4d41b82a2e8600.05002462

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