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Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
Met 103 module--5_milling
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Met 103 module--5_milling

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  • 1. SAFETY PRECAUTIONS FOR MILLING MACHINES• Wear approved safety goggles.• See that the table is clean and dry before mounting holding devices for the work.• Be sure that the bases of work-holding accessories or w/p are wiped clean before they are fastened to the table.• Check to see that the w/p is mounted securely.• Select and mount the proper cutter, and see that it revolves in the proper direction.• Be sure that the arbor, cutter, and collars are clean before mounting them on the machine Use a rag to handle sharp cutters.• Keep your fingers clear of the arbor hole when replacing the overarm support. Fasten the overarm and overarm support securely. ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 2. • Use the proper spindle speed, feed, and depth of cut.• Keep clear of th revolving cutter. Do not reach over the cutter. K l f the l i tt D t h th tt• Stop the cuter to remove chips, and use a brush for chip removal.• Release all automatic feed controls when the job is completed.• Keep the floor around the machine free of chips and oil.• When you are finished, remove and return all tools and accessories. Brush the m/c free of chips and wipe up all excess oil. I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 3. MILLING MACHINES# A milling m/c uses one or more revolving cutters to shape the w/p.# The w/p is usually held in a vise or fixture attached to a movable table. p y# Cutting takes place by feeding the w/p against the revolving cutter. TYPES OF MILLING MACHINES 1. Vertical illi 1 V i l milling m/c / 2. Horizontal milling m/c g 3. Milling m/c for special uses. I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 4. Vertical Milling Machine: End-milling cutters of various types and sizes are used . OPERATIONS : 1. horizontal surfaces, 2. vertical surfaces, 3. angular surfaces, 4. shoulders, 5. grooves, 6. fillets, 7. keyways, 7 k 8. T -slots 9. 9 & dovetails ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 5. H. milling m/c are made in two types: 1. Plain 2. UniversalHorizontal Milling Machine g Plain milling m/c have the table fixed at a right angle to the knee. knee The universal milling m/c table to be swiveled to whatever angle is needed . The universal milling m/c is used widely by toolmakers & Maintenance machinists. It i the most versatile of all is th t til f ll types of milling m/c. Attachments extend the range of ENG I NE ER I NG T AL EC MECH NIC HNOLOGY work that can be done on both plain A MET E N T D P A R T ME & universal milling m/c.
  • 6. HORIZONTAL MILLING MACHINE ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 7. HORIZONTAL UNIVERSAL MILLIMG M/C I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 8. HORIZONTAL UNIVERSAL MILLING M/C• UNIVERSAL HORIZONTAL MILLING M/C CONSITS OF TABLE SWIVEL HOUSING WHICH IS LOCATED BETWEEN TABLE AND SADDLE SADDLE.• PERMITS TABLE TO BE SWIVELED 45 04 ON EITHER DIRECTION ON HORIZONTAL PLANE.• USED FOR MILLING OF HELICAL GROOVES IN TWIST DRILLS, MILLING CUTTERS AND GEARS I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 9. Milling Machine Attachments and AccessoriesA wide variety of accessories are available to increase theversatility and productivity of a milling machine.MILLING MACHINE ATTACHMENTS1. Vertical Milling Attachment:Vertical tt hV ti l attachments enable the t bl thhorizontal milling m/c to beused for operationssuch as face milling milling,end milling, drilling, boring,and T -slot milling. I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 10. 2 . Slotting AttachmentIt converts the rotary motion of the spindle into reciprocatingmotion for cutting keyways, splines, templates, and irregular-shaped surfaces.VERTICAL ATTACHMENT SLOTTING ATTACHMENT I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 11. CUTTER-HOLDING ACCESSORIES Arbors, Collets, and Adapters I NE ER I NG ENG T AL EC MECH NICFig : Mounting a milling cutter on an arbor for HNOLOGY A METuse on a horizontal milling machine E N T D P A R T ME
  • 12. ARBOR……… One end of the arbor is held in the milling machine spindle while the outer end is supported by one or more arbor supports. The cutter is position on the arbor by collars and is prevented from turning on the arbor by a square key .COLLETS…… I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 13. WORK-HOLDING DEVICES FOR MILLING M/C1. Vise2.2 Chucks3. Rotating tables4. Angle plates5. Special fixtures p6. Universal dividing head7.7 Clamp work to table8. V - Blocks I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 14. ROTARY TABLE A plain milling machine viseV-BLOCK A universal vise permits compound angles to be machined I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 15. I NE ER I NG ENG T AL EC MECH NIC HNOLOGY AVARIOUS CLAMPS…. E MET N T D P A R T ME
  • 16. MILLING CUTTERS & OPERATIONS…. I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 17. I NE ER I NG ENG T AL ECMECH NIC HNOLOGY A MET E N T D P A R T ME
  • 18. A SHELL MILL CUTTERFig : (a) T-slot cutting with a milling cutter g ( ) g g I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 19. LIGHT DUTY PLIAN MILLING CUTTERPLAIN MILLING CUTTERHIGH HELIX PLIAN MILLINGCUTTER HEAVY DUTY PLAIN MILLING CUTTER ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 20. Standard Shank-Type Helical Milling Cutters FACE MILLING CUTTERSIDE MILLINGCUTTER I NE ER I NG ENG T AL EC MECH NIC HN Shell End Mills OLOGY A MET E N T D P A R T ME
  • 21. Types of Formed Cutters yp GEAR TOOTHCONCAVE CUTTER CONVEX CUTTER I NE ER I NG ENG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 22. CUTTING SPEED, FEED & DEPTH OF CUTCUTTING SPPED DEPENDS ON….. • Type of work material • Cutter C tt material t i l • Diameter of the cutter • Surface finish required • Depth of cut p • Rigidity of the machine and work setup INCH METRIC 4X CS 320 X CSr / min = r / min = D D CS= Cutting speed (m/min) CS= Cutting speed (ft/min) D= Dia of cutter ( mm) D= Dia of cutter ( inch) ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 23. Feed Feed is the rate at which the work moves into the revolving cutter. It is measured in either inches per minute or millimeters per minute. INCH CALCULATIONS MERTIC CALCULATIONSFEED INCH / min = N X c.p.t X r / min FEED mm/ min = N X c.p.t X r / min N = NUMBER OF TEETH ON CUTTER c.p.t = chip per tooth for a cutter & material ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME
  • 24. Chip per tooth is the amount of material which shouldbe removed by each tooth of the cutter as it revolvesand advances into the work.Depth f tD th of cutWhere a smooth accurate finish is desired, it isconsidered good milling practice to take a roughingand finishing cut.Roughing cuts should be deep, with a feed as heavyas the work and the machine will permit. When a fine finish is required, the feed should bereduced rather than the cutter speeded up. ENG I NE ER I NG T AL EC MECH NIC HNOLOGY A MET E N T D P A R T ME

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