single point cutting tool

1. Seminar
on

2. 2
*A cutting tool is any tool that is used to
remove metal from the work piece by
means of shear deformation.
*It is one of most important components
in machining process
*It must be made of a material harder
than the material which is to be cut, and
the tool must be able to withstand the
heat generated in the metal cutting
process.

3. Types of cutting tool
1.Single Point Cutting tool
2.Multi Point Cutting tool
According to the number of major cutting edges -

4. Single point cutting tool
Tool having only a single cutting edge
Ex-Shaping Tool, Turning tool , Slotting tool.
Multi point cutting tool
Tool having more than two cutting edges
Ex- Milling , drilling and grinding tool

6. Multi Point Cutting Tool

7. 7
Cutting tool bits generally made
*High-speed steel
*Cast alloys
*Cemented carbides
*Ceramics
*Cermets
*Cubic Boron Nitride
*Polycrystalline Diamond

8. TOOL GEOMETRY
Single Point Cutting Tool

9. 9
Single Point Cutting
Tool

10. TOOL PARTS
FACE and RAKE SURFACE
The surface along which chip move upward called
rake surface
FLANK and RELIEF SURFACE
The other surface which is avoid rubbing with
machined surface is called flank or relief surface
SHANK
It forms the main body of a solid tool and it is the
part of tool which is gripped in the tool holder

11. 6 Angles and 1 Nose radius
oBACK RAKE ANGLE
oSIDE RAKE ANGLE
oEND RELIEF ANGLE
oSIDE RELIEF ANGLE
oEND CUTTING EDGE ANGLE
oSIDE CUTTING EDGE ANGLE
oNOSE RADIUS

12. DEFINING
THE
TOOL GEOMETRY

13. CUTTING THE SECTION PERPENDICULAR TO THE BASE
AND PARALLEL TO WIDTH

14. SIDE RAKE ANGLE
SIDE RELEF ANGLE

15. SIDE RAKE ANGLE
It is the angle between the face of the tool and the base of
the shank or holder.
SIDE RELIEF ANGLE
It is the angle between the portion of the side flank
immediately below the side cutting edge and a line drawn
through this cutting edge perpendicular to the base.

16. CUTTING THE SECTION PARALLEL TO THE BASE

17. END CUTTING ANGLE
SIDE CUTTING ANGLE

18. END CUTTING EDGE ANGLE
It is the angle between end cutting edge & line
Normal to tool shank.
SIDE CUTTING EDGE ANGLE
It is the angle which prevents interference as the
tool enters the work material.

19. CUTTING THE TOOL PARALLEL TO ITS LENGTH
AND PERPENDICULAR TO THE BASE

20. BACK RAKE ANGLE
END RELIEF ANGLE

21. BACK RAKE ANGLE
It is the angle between face of the tool
&plane parallel to base
END RELIEF ANGLE
The angle between front surface of the tool & line
normal to base of the tool Is known as a front clearance angle

22. 22
It is the angle between face of the tool &plane
parallel to base
*Positive
Top face slopes downward
away from point
*Negative
Top face slopes upward
away from point
*Neutral
BACK RAKE ANGLE

23. NOSE ANGLE or LIP ANGLE or WEDGE ANGLE or
KNIFE ANGLE or CUTTING ANGLE

24. NOSE ANGLE
It is the angle between face and flank.
The angle is maximum when clearance and rake angle
are minimum.
Larger lip angles allows high depth of cut, high cutting speed,
work on hard materials.