orthogonal vs oblique cutting

1. Course code ME3493 Course name Manufacturing Technology
Year/sem 2/4 Unit no 1
Course Instructor: M.Karthikeyan AP/Mech
UNIT 1 MECHANICS OF METAL CUTTING
Mechanics of chip formation, forces in machining, Types of chips, cutting tools – single point
cutting tool nomenclature, orthogonal and oblique metal cutting, thermal aspects, cutting tool
materials, tool wear, tool life, surface finish, cutting fluids and Machinability
S.NO Orthogonal cutting Oblique cutting
1. It is a 2D cutting It is a 3D cutting
2.
3. Cutting edge of the tool is oriented at
90° to the tool feed
Cutting edge of the tool is inclined at an
acute angle (less than 90°) to the tool
feed
4. Only one cutting edge is in action More than one cutting edge is in action
5. Chip flow is perpendicular to cutting
edge
Chip flow makes an angle with the
cutting edge
6. Mainly used in slotting, parting,
grooving and pipe cutting
Mainly used in drilling, turning,
grinding etc.,
7. Two components of forces are present
(X & Y)
Three components of forces are present
(X, Y&Z)
8. Maximum chip thickness occurs at
the middle
May not occur at the middle
9. High heat is produced in the cutting
region.
Less heat is produced in the cutting
region.
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Department of Mechanical Engineering

2. 10. The shear force that acts per unit area
is high
The shear force that acts per unit area is
less
11. Chip shape is spiral Chip shape is long curl
12. Surface finish is poor Surface finish is good
13. Tool life is less Tool life is more