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Lathe training

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Transcript

  • 1. Basic Lathe Operation Maintenance Department
  • 2. 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.
  • 3. Main parts of the lathe
    • Headstock
    • Carriage
    • Bed
    • Apron
    • Tailstock
    • Chuck
    • Cross slide
    • Compound rest
    • Controls
  • 4.  
  • 5. Four jaw chuck
  • 6. Three jaw chuck
  • 7. bed apron carriage
  • 8. tailstock
  • 9. steadyrest
  • 10. Quick change tool post
  • 11. Cut off tool
  • 12. Knurling tool
  • 13. Quill Drill chuck
  • 14. ourouo Our lathe
  • 15. 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.
  • 16. 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.
  • 17. 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.
  • 18. Feed & thread change handles
  • 19. Spindle speed handles Feed direction handle
  • 20. Feed engage handle
  • 21. Various operations performed on the lathe
    • Turn
    • part
    • face
    • neck
    • radius
    • bevel
    • bore
    • drill
    • thread
    • tap
    • knurl
    • taper
  • 22. Cutting tools used on the lathe
    • Right hand & left hand
    • roughing tool
    • turning tool
    • facing tool
    • threading
    • bevel
    • radius
    • knurling
    • necking & cutoff tool
  • 23.  
  • 24.  
  • 25.  
  • 26. Cutting edge terms Side rake angle Back rake angle
  • 27. Side clearance angle End clearance angle
  • 28. Side cutting edge End cutting edge angle
  • 29. 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
  • 30. 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.
  • 31. Cutting speed formula
    • Rpm = 4 x cs
    • dia.
  • 32. 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.
  • 33. 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
  • 34. 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.
  • 35. Knurl Types
  • 36. 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.
  • 37. 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.
  • 38. 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.
  • 39. 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.
  • 40. Chasing dial
  • 41. 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.