Lathe machine Operations
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Transcript of Lathe machine Operations
MANUFACTURE ENGINEERING - 2
MACHINING OPERATION PERFORMED ON LATHE
Kishan SavaliyaME-2 (136540319101)
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04/28/2023
Engine Lathe
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Diagram of an engine lathe, showing its principal components
Machining Operations
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Generally performed after other manufacturing processes (casting, forging, …) Other processes create the general shape of the work part Machining provides the final shape, dimensions, finish, and
special geometric details that other processes cannot create
Most important machining operations: Turning Drilling Milling
Other machining operations: Shaping and planning Broaching Sawing
Primary Machining Parameters
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Cutting Speed – (v) Primary motion Peripheral speed m/s ft/min
Feed – (f) Secondary motion Turning: mm/rev in/rev Milling: mm/tooth in/tooth
Depth of Cut – (d) Penetration of tool below original work surface Single parameter mm in
Resulting in Material Removal Rate – (MRR)MRR = v f d mm3/s in3/minwhere v = cutting speed; f = feed; d = depth of cut
Turning
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A single point cutting tool removes material from a rotating workpiece to generate a rotationally symmetric shape
Machine tool is called a lathe
Types of cuts: Facing Contour turning Chamfering Parting (Cut-off) / Grooving Threading
Turning Parameters Illustrated
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Drilling
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Creates a round hole in a workpart Contrasts with boring which can only
enlarge an existing holeCutting tool called a drill or drill bit Customarily performed on a drill press
Milling Parameters Illustrated
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Facing
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Tool is fed radially inward
Contour Turning
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Instead of feeding the tool parallel to the axis of rotation, tool follows a contour that is not necessarily straight (thus creating a contoured form).
Right & Left Hand Tools
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Right Hand Tool: Cuts from right to left
Left Hand Tool: Cuts from left to right
Chamfering
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Cutting edge cuts an angle on the corner of the cylinder, forming a "chamfer"
Parting (Cutoff) / Grooving
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Tool is fed radially into rotating work at some location to cut off end of part, or provide a groove
Threading
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Pointed form tool is fed linearly across surface of rotating workpart parallel to axis of rotation at a large feed rate, thus creating threads