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Lathe training

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    Lathe training Lathe training Presentation Transcript

    • Basic Lathe Operation Maintenance Department
    • Safety
      • Follow all instructions in the machine manual.
      • Wear approved industrial safety glasses & safety shoes.
      • Do not wear gloves, long hair, long sleeves, rings, jewelry or other loose items that could become caught in moving parts.
      • Keep all parts of body away from moving parts.
      • Use proper point of operation safeguarding.
    • Main parts of the lathe
      • Headstock
      • Carriage
      • Bed
      • Apron
      • Tailstock
      • Chuck
      • Cross slide
      • Compound rest
      • Controls
    •  
    • Four jaw chuck
    • Three jaw chuck
    • bed apron carriage
    • tailstock
    • steadyrest
    • Quick change tool post
    • Cut off tool
    • Knurling tool
    • Quill Drill chuck
    • ourouo Our lathe
    • Control system of the Lathe
      • Lever for cutting right or left hand threads.
      • Spindle speed - change handle.
      • Coolant pump motor switch.
      • Spindle speed - change handle.
      • High-low switch for main drive motor
      • Upper slide tightening screw.
      • Handle for moving cross slide.
      • Handle for locking tool post.
      • Handle for moving upper slide.carriage.
    • Control system of the Lathe
      • Lever for changing thread pitch or feed rate.
      • Main switch.
      • Control lever for changing thread pitch on feed rate.
      • Lever for the rotating direction of spindle.
      • Handwheel for controlling the travel of the carriage.
      • Handle for controlling the half nut to effect transverse or longitudinal feed movement.
      • Lever for the rotating direction of the spindle.
      • Handle for changing speed.
    • Control system of the Lathe
      • Screw for positioning carriage slide.
      • Handle for locking tailstock quill.
      • Nut for positioning tailstock.
      • Screws for cross adjustment of tailstock.
      • Handle for quick release of tailstock.
      • Handle for moving quill.
    • Feed & thread change handles
    • Spindle speed handles Feed direction handle
    • Feed engage handle
    • Various operations performed on the lathe
      • Turn
      • part
      • face
      • neck
      • radius
      • bevel
      • bore
      • drill
      • thread
      • tap
      • knurl
      • taper
    • Cutting tools used on the lathe
      • Right hand & left hand
      • roughing tool
      • turning tool
      • facing tool
      • threading
      • bevel
      • radius
      • knurling
      • necking & cutoff tool
    •  
    •  
    •  
    • Cutting edge terms Side rake angle Back rake angle
    • Side clearance angle End clearance angle
    • Side cutting edge End cutting edge angle
    • Cutting speeds for high speed tooling
      • Aluminum 600 - 2000 feet per min
      • brass 500 - 1000 feet per min
      • cast iron 50 - 60 feet per min
      • steel [crs] 100 -180 feet per min
      • steel [medium] 80 -120 feet per min
      • steel [tool] 30 -50 feet per min
    • Cutting speeds for carbide insert
      • Steel 390 - 660 feet per min
      • stainless 260 - 480 feet per min
      • tips
      • use coolant
      • if chips are blue ,the speed is too high.
    • Cutting speed formula
      • Rpm = 4 x cs
      • dia.
    • Turning a part in lathe
      • Roughing cut : tool a little above center & more feed.
      • Finishing cut : good edge on tool & less feed.
      • Filing : file to final size at high speed.
      • For safety reasons, file with your left hand.
      • Polishing : with emery for best finish.
    • Parting in lathe
      • Tool should stick out a shade longer than half the dia. of the shaft.
      • Part as close to chuck as possible.
      • Tool should be right on center.
      • If too high, tool will ride on small dia.
      • If too low, it will dig in & grab.
      • Use plenty of lubricant
      • Feed by hand & be sensitive
    • KNURLING
      • KNURLING TOOL IN THE CENTER OF SHAFT.
      • TOOLS SHOULD BE PARALLELTO SHAFT.
      • SET LATHE AT SLOW SPEED.
      • MEDIUM OR FAIRLY COURSE FEED.
      • MOVE TOOL IN AT RIGHT EDGE ABOUT .015 OF INCH TO START DIAMOND.
    • Knurl Types
    • THREADING
      • TURN SHAFT TO PROPER DIA.
      • SET DIALS TO THREAD TO BE CUT.
      • SET COMPOUND REST TO 29 DEGREES.
      • TOOL SHOULD BE ON CENTER & CUTTING EDGE SET WITH A CENTER GAGE.
      • SLOW SPEED.
      • BRING TOOL POINT IN & TOUCH SHAFT.
    • THREADING
      • SET CROSS-FEED COLLAR & COMPOUND COLLAR TO ZERO.
      • THEN CLEAR THE WORK TO RIGHT.
      • THE CROSS-FEED SHOULD BE BROUGHT BACK TO THIS ZERO AFTER EACH CUT.
      • MOVE COMPOUND IN A FEW THOUSANDS & ENGAGE LEAD SCREW.
    • THREADING
      • THE LEAD SCREW SHOULD BE ENGAGED ON THE SAME LINE EVERYTIME TO MAKE IT SIMPLE.
      • IT IS BEST TO PICK A NUMBER & USE THE SAME NUMBER.
      • AFTER FIRST CUT, CHECK TO SEE IF THE RIGHT PITCH IS BEING CUT.
      • USE CUTTING OIL WHILE CUTTING.
    • THREADING
      • FORMULA FOR THREADS.
      • THREADS PER INCH DIVIDED BY .750
      • THIS WILL BE THE TOTAL NUMBER OF THOUSANDS TO MOVE THE TOOL INTO THE WORK.
      • A NUT SHOULD BE USED FOR FINAL FIT.
    • Chasing dial
    • CLEANING
      • ALWAYS CLEAN LATHE AFTER EACH USE.
      • IT IS BEST TO USE A BRUSH TO CLEAN OFF CHIPS.
      • AIR CAN BE USED WITH CARE & GLASSES ON.