Mechanical Engineering Senior Design Lab



SafetyPPE: Closed toe shoes and long pants are what they have to bring, we have safety glasses. Safety is number 1.For the lathe, loose fitting clothes are not allowed.For students with long hair, make sure his/her hair is tied out of the way sufficiently.If you see any unsafe situation or any students that you are worried about, notify the lab manager immediately.ToolbossUse unity ID to access the toolbossEvery tool must be checked back in after classLab manager will have a report of tools not checked back inOiling Use lathe oiling can to oil all ports before running the machinePowering onMain breaker on the wallMachine switch (bottom left of the machine)Emergency stop on the machine (twist knob clockwise to pop out)Lever on the carriage to turn machine on (up to spin the chuck CCW, down to spin CW (which is used 99% of the time)Foot brake and E-stopMain ComponentsHeadstockGearbox High, low, neutral ChuckChuck key (T-Handle) – Used to tighten the chuck; DO NOT LEAVE THIS IN THE CHUCK FOR ANY REASON… IF YOUR HAND IS NOT ON THE T-HANDLE, IT SHOULD NOT BE IN THE CHUCKFirst warning is a punched badgeTailstock Handwheel – moves the quill in and out (used for drilling a hole a particular depth. Show how the locks work.Morse taper for drill chuck and live center.Make sure the quill is extended at least 1” or it will not seatCarriageRadial (x-direction) and Axial (z-direction) handwheels(DROs) that can digitally tell you the position of the toolTool post Holds the tool holder (which holds the insert or tool that is used to cut the part)1/2” bolt (3/4” wrench needed) can be loosened to reposition the tool post to set the angle of the cutting toolToolholderAdjust tool height with the adjustment screw, use the live center for a visual reference. Leading edge of the tool – this is the top edge of the insert, and it should touch the work piece first (that is, the middle or bottom of the insert shouldn’t hit the work piece before the top. (insert clearance angles)Compound slideUsed for cutting tapers on a part.When you adjust the cross slide, the tool position changes, which is not registered on the digital readout. Types of cutting toolsO.D. Boring barsParting (cut-off)Knurling Basic types of cutsFacing pass -Use X axis handwheel to machine the front face of the work piece (sets the length of the part)Turning pass -Use Z axis handwheel to machine the “side” of the work piece (sets the diameter of the part)Drilling -Use the drill chuck in the tailstock quill Certification partOperation 1Face material off of the front, .02 max per pass (set Z) Skim the diameter (set X)Finish 1.0inch diameterCorner break (45deg chamfer with cross slide)Operation 2Chuck on 1.0 diameterFaceUnclamp, check part lengthRe-clamp, Finish face (Bring to size)Rough O.D. (max .05 per pass on diameter) leave .01 on diameter and .005 on each faceFinish diameters in one fluent passBreak cornersUse a #2 center drill for a guide Drill with #21 drill at least 1inch deepClamp 10-32 tap in tap handle Use tap magic for lubrication Jog tailstock with live center near the partLock tailstock in placeTurn the tap handle by hand while using the tailstock handwheel for support Once a couple of threads are cut, proceed with tapping without the tailstock support (since the alignment is set with those first few threads)Every few turns break the chip by turning the handle CCW. (Be sure to remove the tap and clean out the chips about halfway down.Countersink threaded holeComplete ................
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