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Milling Defined The process of cutting away material by feeding a workpiece past a rotating multiple tooth cutter.

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Presentation on theme: "Milling Defined The process of cutting away material by feeding a workpiece past a rotating multiple tooth cutter."— Presentation transcript:

1 Milling Defined The process of cutting away material by feeding a workpiece past a rotating multiple tooth cutter

2 Vertical Milling Machine

3 Milling Machine Parts

4

5

6 Horizontal Milling Machine

7 Milling Operation

8 Conventional or Up Milling

9 Climb Milling

10 Milling Cutters

11

12 End Mills

13 Tool Holding for Milling

14 End Milling

15 Face Milling

16 Milling Workholding Devices

17

18 Calculating RPM For Milling RPM = CS x 4/D Where RPM = Spindle speed (in revolutions per minute). CS = cutting speed of milling cutter (in SFPM) D = diameter of milling cutter (in inches)

19 Calculating Feed Rate For Milling Feed Rate is expressed in IPM IPM = CPT x N x RPM IPM = Feed rate in inches per minute. CPT = Chip per tooth N = Number of teeth of the milling cutter

20 Calculate Feed Rate For Milling Given The Following: CS = 300 D = 0.5” CPT = 0.005 N = 2

21 Answer The first step is to calculate the spindle speed before the feed rate can be calculated. RPM = CS X 4/D = 300 x 4/0.5 = 2,400 The second step is to calculate the feed rate. IPM = CPT x N x RPM = 0.005 x 2 x 2,400 = 24 IPM (Inches Per Minute)

22 Offset Boring Head

23 Right Angle Attachments

24 Digital Readout

25 Bed-Type Milling Machine

26 Horizontal Knee/Column Milling Machine

27 Machining Center

28 Calculate IPM and RPM Given that: –CS = 250 –D = 0.25” –CPT = 0.003 –N = 4 Show your work here: RPM = _______; IPM = ________ Your Name: ________________________


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