1. Presented By: JOSHI HARSH S Enroll. No.: 130620119018 G.I.T.S., Prantij Milling Machine

2. The Vertical Milling Machine Turret type vertical milling machine.

3. The Horizontal Milling Machine Horizontal milling machine with arbour steady between spindle nose and arbour support.

4. Example of a horizontal milling operation with multiple cutters used on a long arbour, i.e. gang milling

5. Milling Cutters Example of: –A ball nosed slot drill –A slot drill –An end mill The gold colouring is a titanium nitride coating which has a lower coefficient of friction compared to the parent material HSS. As a result less heat is generated and tool life increased.

6. Milling Cutters A selection of milling cutters for both vertical and horizontal milling operations.

7. Aspects of End Milling The radial depth of cut should be less than 0.1 of the diameter of the mill: ar <0.1 D.

8. Aspects of End Milling The radial depth of cut should be no more than 0.9 D: ar = to or <0.9 D.

9. Producing an open ended slot The radial depth of cut is equal to the diameter of the mill: ar = D.

10. Up-Cut & Down-Cut Milling In conventional milling, the cutter revolves opposite to the direction of table feed. Therefore the width of the chip starts at zero and increases to a maximum at the end of the cut. This can lead to accelerated tool wear under some conditions. Conventional milling may be advantageous when milling hot rolled steel, surface hardened and steels with a surface scale. In climb milling, the cutter revolves in the same direction as the table feed. The tooth meets the work at the top of the cut, producing the thickest part of the chip first. In horizontal applications the resultant force created by climb milling can act as a clamping force, acting towards the machine table. It is important to make sure that the machine tool has no leadscrew backlash. Normally climb milling improves product surface finish and increases tool life.

11. Tipped Milling Cutters A tipped End Mill

12. Tipped Milling Cutters Tipped cutters for high removal rates.

13. Workholding The magnetic table. –Can be used to hold magnetic materials quickly and effectively.

14. Workholding Cylindrical workpieces can be held in a chuck which is mounted directly to the machine table

15. Milling Operations A ripping cutter being used to rough out. The serrated edges break the chip improving swarf evacuation and reducing the risk of tool breakage.

16. Workholding Angle Plates can be used for holding workpieces during milling operations. The angle bracket may need to be trued first using a DTI.

17. Workholding The rotary table. –Used for producing radii, PCDs or circular features on workpieces. The photograph shows the rotary table being set-up in-line with the machine spindle.

18. Use of a Rotary Table Clocking up the workpiece in-line with the machine spindle.

19. Rotary Table - Further Applications Aligning the workpiece with the machine spindle.

20. Rotary Table - Further Applications Using the rotary table to machining a radius on the workpiece. Note: a four jaw chuck is being used with some jaws reversed.

21. Rotary Table - Further Applications Production of radius.

22. Rotary Table - Further Applications Production of radius.

23. Rotary Table - Further Applications Using a rotary table to index hole positions and machine a PCD.

24. Rotary Table – Further Applications Use of a rotary table to mill the diameter of workpiece.

25. Rotary Table with Additional Workholding Workpieces can be mounted directly to the table of the rotary table or other workholding devices such as vices, angle plates etc can be mounted on the table for work holding.