Single Point Cutting Tools

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 ASA System 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 Single point cutting tool One cutting tip is available e.g. lathe machine tools, shaping tools, planning tools, etc. Multi-point cutting tool More than one tip is available e.g. milling cutter, grinding wheel, drill, etc. MULTIPOINT CUTTING TOOLS

4. Tool Geometry

5. Tool Designation ASA System ORS System NRS System

6. 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.

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

8. 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.

9. 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.

10. 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.

11. 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.

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

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

14. 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 .

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