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manuf part 2

cutting fluids

cutting fluids fluid applied directly to operation to improve cutting performance
reasons to use cutting fluid reduce friction and wear, cool the cutting zone, wash away chips
cutting speed primary/speed motion
feed secondary/feed motion
depth of cut penetration of the tool below original work surface
roughing cut remove large amount of material high feed and depth low speeds
finnishing cut complete part and achieve final specs low feeds and depth high cutting speed
Turning single point cutting tool removes material from rotating work piece to generate a cylindrical shape on lathe primary motion is rotating work piece secondary is cutting tool
types of turning straight turning tapering facing cutoff contour turning form turning boring knurling
straight turning reduces diameter tool is fed parallel to the axis of rotation
taper turning produce tapered cylinder tool is fed at an angle
Facing to produce flat surface tool is fed radially (perpendicular) into the rotating workpiece on one end
cutoff/parting to cut off the end of the part, tool is fed radially into the part at some location
contour turning tool follows a contour to create a contoured form in the part
form turning tool has a shape that is imparted to the part
boring like straight turning but is performed on the inside of an existing hole in the part to enlarge a hole
knurling to produce a regular cross-hatched pattern in the part surface
cutting speed tangential speed of the workpiece
feed distance the tool travels during one revolution of the workpiece
depth of cut difference between the original and machined surface
Drilling creates round hole workpiece is fized the cutting tool rotates as well as moves in a direction parallel to its axis of rotation into the workpiece, the rotation motion is the primary motion the penetration is the secondary, uses a multiple cuttingedgetool
types of drilling reaming tapping counterboring
reaming to slightly enlarge a hole, provide better tolerance on diameter, and improve surface finish.
tapping to provide internal threads on an existing hole. Tool called a tap.
counterboring provides a stepped hole, in which a larger diameter follows a smaller diameter partially into the hole
milling creates multiple shapes primary motion is rotating tool secondary motion the workpiece uses milling cutter and milling machine
types of milling peripheral and face
peripheral milling axis of tool parallel to surface machined.
face milling The axis of tool is perpendicular to the surface being machined.
slab milling the basic form of peripheral milling in which the cutter width extends beyond the workpiece on both sides
slotting milling width of cutter is less than workpiece width, creating a slot in the work
conventional face milling Cutter overhangs work on both sides
end milling Cutter diameter is less than work width, so a slot is cut into part
pocket milling Another form of end milling used to mill shallow pockets into flat parts
shaping and planing Create a straight and flat surface Use a single point cutting tool moved linearly relative to the workpart Interrupted cutting (start-and-stop motion)
broaching Moves a multiple tooth cutting tool linearly relative to work in direction of tool axis Cutting tool called a broach
sawing Cuts narrow slit in work by a tool consisting of a series of narrowly spaced teeth Tool called a saw blade Separate a workpart into two pieces or cut off unwanted portions of part
Created by: bonvicc1
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