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Manufacturing Processes

Manufacturing Processes. Dr. Apiwat Muttamara. Milling. Cutting Speed. Where: N = Spindle Speed (RPM) CS = Cutting Speed of Metal (m/min) d = Diameter of Workpiece. Cutting Speed. Feed.

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Manufacturing Processes

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  1. Manufacturing Processes • Dr. Apiwat Muttamara

  2. Milling

  3. Cutting Speed • Where: N = Spindle Speed (RPM)CS = Cutting Speed of Metal (m/min)d = Diameter of Workpiece

  4. Cutting Speed

  5. Feed • The term `feed' is used to describe the distance the tool moves per revolution of the workpiece and depends largely on the surface finish required. For roughing out a soft material a feed of up to0.25 mm per revolution may be used. With tougher materials this should be reduced to a maximum of 0.10 mm/rev. Finishing requires a finer feed then what is recommended.

  6. Types of Milling Machine • Horizontal Vertical

  7. End mill • Cutting tools for Vertical Millinga. End Mills Rough Cut End MillsFor rapid metal removal. • End Mill

  8. Slot Drill Face Milling Cutters

  9. INSERTENDMILL • INSERTENDMILL

  10. Ballnose

  11. Spindle Speed • Spindle speed in (R.P.M.) where -- N = R.P.M. of the cutterCS = Linear Cutting Speed of the material in m/min. ( see table 1 ) d = Diameter of cutter in mm

  12. Feed Rate • Feed rate (F) is defined as the rate of travel of the workpiece in mm/min. • F = f . u . N • where -- F = table feed in mm/min f = movement per tooth of cutter in mm ( see table 1 ) u = number of teeth of cutter N = R.P.M. of the cutter

  13. F = f . u . N Table 1

  14. Depth of Cut • Depth of cut is directly related to the efficiency of the cutting process. • For a certain type of cutter, a typical range of cut will be recommended by the supplier.

  15. Feed Direction Up Cut Down Cut,Climb Milling • direction opposite to the table. • conventional milling   • Backlash • CNC milling machine. • Require less power in feeding the table • Give a better surface finish on the workpiece.

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