Information about single point cutting tools, their materials, their geometry, etc

1. SINGLE POINT CUTTING
TOOL
A Presentation On
By
GIRISH YUVRAJ SURVE (13255)

2. • Types of tools
• Tool geometry
• Tool designation
1. ASA System
2. ORS System
• Effects of back rake angle on machining
• Effect of side rake angle
• Effect of relief angle
• Effect of cutting edge angle
• Effect of nose radius on machining
• Tool material
• Conclusion
• References
Content

3. Types of tool
1. Single point cutting tool
• One cutting tip is available
• e.g. lathe machine tools, shaping tools, planning tools, etc.
2. Multi-point cutting tool
• More than one tip is available
• e.g. milling cutter, grinding wheel, drill, etc.
MULTIPOINT CUTTING TOOLS

4. Tool Geometry

6. Tool Designation
1. ASA System
2. ORS System
3. NRS System

7. ASA System
• Angles are measured with reference to 3 mutually perpendicular planes.
• Understanding is easy.
• Measurements of angles is also easy.
• Analysis of machining is difficult.

8. ORS System
• Angles measured with reference to major cutting edge.
• Analysis is easy.
• Understanding is difficult.
• For measurement of angles, we require special fixtures.

9. Effect of Back rake angle on machining
As back rake angle increases,
• Strength of tool increases.
• Forces on tool decreases.
• Power required for machining is decreases.
• Tool life increases.
Maximum +ve rake angle used is 45 degree.
0 degree rake angle used for brass workpieces.
Also for thread cutting 0 degree rake angle is used.
-ve rake angle is used carbide cutting tool.
-ve rake angle used is 10 degree only.

10. Effect of side rake angle on machining
As side rake angle increases,
• Strength of tool increases.
• Forces are decreases but in small amount.
• Power is also decreases but in small amount.
• Tool life is increases.
Generally side rake angle is in between 5 to 15 degree.

11. Effect of relief angle
Provided to avoid rubbing between tool and workpiece.
As relief angle increases,
• Strength decreases.
• Forces are slightly decreases.
• Tool life is slightly increases.

12. Effect of cutting edge angle
Mainly influence the surface finish of component.
By reducing end cutting angle or by increasing side cutting angle, nose size
increases and surface finish also increases.

13. Effect of nose radius
Mainly influence the surface finish.
With increase in nose radius, surface finish increases.

14. Tool material
• High carbon steel
• High speed steel
• Stellite
• Cemented carbide+
• Ceramics
• Cermets
• Diamond
• CBN (Cubic Boron Nitrite) or Borozone
• Ucon
• Sialon

15. Conclusion
• There are many advantages of single point cutting tool, but there also many
disadvantages.
• Many disadvantages of single point cutting tool are reduced by multi point
cutting tool.
• In this we see geometry of cutting tool, material of cutting tool, etc.

16. references
• Production technology by P. C. Sharma
• Workshop technology by Hajara Choudhari
• Website – slideshare.net