Today we will discuss about difference
between orthogonal and oblique cutting. What is Orthogonal Cutting? What is
Oblique Cutting? Metal cutting or commonly known as machining, is the most common
phenomenon used in manufacturing industries. Every product, big or small,
undergoes a machining process to get final product. So the knowledge of basic
types of metal cutting are most important. If we talk about metal cutting two
terms comes in our mind orthogonal and oblique. These both are the metal
cutting mechanism which is purely depending on the feed angle and cutting
direction of tool.
Orthogonal cutting is a type of metal cutting
in which the cutting edge of wedge shape cutting tool is perpendicular to the
direction of tool motion. In this cutting the cutting edge is wider than width
of cut. This cutting is also known as 2D cutting because the force develop
during cutting can be plot on a plane or can be represent by 2D coordinate.
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| Orthogonal Cutting |
Oblique cutting is another type of cutting
in which the cutting edge of wedge shape cutting tool make a angle except right
angle to the direction of tool motion. This will affect the cutting conditions.
It is also known as 3D cutting because the cutting force develop during cutting
cannot be represent by 2D coordinate or used 3D coordinate to represent.
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| Oblique Cutting |
The basic and main difference between orthogonal
cutting and oblique cutting is that in orthogonal cutting, cutting edge of the tool
is perpendicular to the direction of motion but in oblique cutting the cutting
edge make an angle with the direction of motion. There are many other differences
which are describe below.
Difference between Orthogonal cutting and Oblique cutting:
S. No.
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Orthogonal Cutting
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Oblique Cutting
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1.
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The cutting angle of tool make right
angle to the direction of motion.
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The cutting angle of tool foes not make
right angle to the direction of motion.
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2
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The chip flow in the direction normal to
the cutting edge.
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The chips make an angle with the normal
to the cutting edge.
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3.
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In orthogonal cutting only two components
of force considered cutting force and thrust force which can be represent by 2D
coordinate system.
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In oblique cutting three component of force
are considered, cutting force, thrust force and radial force which cannot represent
by 2D coordinate. It used 3D coordinate to represent the forces acting during
cutting, so it is known as 3D cutting.
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4.
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This tool has lesser cutting life compare
to oblique cutting.
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This tool has higher cutting life.
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5.
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The shear force act per unit area is high
which increase the heat developed per unit area.
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The shear force per unit area is low, which
decreases heat develop per unit area hence increases tool life.
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6.
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The chips flow over the tool.
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The chips flow along the sideways.
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Today we have learned about orthogonal
cutting and oblique cutting. If you have any query regarding this article, ask
by commenting.