Week 2: Chip breakers, Orthogonal & Oblique cutting,

Lecture Notes Page 19

Chip breakers

Continuous machining like turning of ductile metals, unlike brittle metals like grey cast iron, produce continuous chips, which leads to their handling and disposal problems. The problems become acute when ductile but strong metals like steels are machined at high cutting velocity for high MRR by flat rake face type carbide or ceramic inserts. The sharp edged hot continuous chip that comes out at
very high speed: Becomes dangerous to the operator and the other people working in the vicinity.
May impair the finished surface by entangling with the rotating job.
Creates difficulties in chip disposal. Therefore it is essentially needed to break such continuous chips into small regular pieces for: Safety of the working people. Prevention of damage of the product. Easy collection and disposal of chip
 

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