Metal cutting is “the process of removing unwanted material in the form of chips, from a block of metal, using cutting tool”.
Methods of Metal Cutting:
There are two basic methods of metal cutting based on cutting edge and direction of relative motion between tool and work:(i) Orthogonal cutting process
(ii) Oblique cutting process
(i) Orthogonal Cutting Process:
In orthogonal cutting process, the cutting edge is perpendicular (90 degree) to the direction of feed. The chip flows in a direction normal to cutting edge of the tool. A perfectly sharp tool will cut the metal on rack surface.
(ii) Oblique Cutting Process:
In oblique cutting process, the cutting edge is inclined at an acute angle (less than 90 degree) to the direction of feed. The chip flows sideway in a long curl. The chip flows in a direction at an angle with normal to the cutting edge of the tool.
Difference between the two is discussed in detail in the table below:
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