Boring Boring is an operation of enlarging a hole that has already been drilled. Boring is done by a single point cutting tool.
5) Operation used for enlarging the previously drilled hole is called
Related Diploma CET Mechanical Question Paper - 2018 with Answer Key
Trepanning is an operation of producing a hole by removing metal along the circumference of a hollow cutting tool.
Up Milling is the process of removing metal by a cutter which is rotated against the direction of travel of the workpiece is called up-milling. It is also called conventional milling.
In up-milling, the chip thickness is minimum at the beginning of the cut and maximum at the end of cut. The cutting force varies from zero to maximum.
Down Milling is the process of removing metal by a cutter which is rotated in the same direction of travel of the workpiece is called down milling. It is also called climb milling.
In down milling, the chip thickness is maximum at the beginning of the cut and minimum at the end of cut. The cutting force varies from maximum to zero.
Crank and slotted quick return motion mechanism
In a shaper, reciprocating motion of the ram is obtained by crank and slotted quick return motion mechanism
In a milling machine, the rate at which the workpiece advances under the cutter is called Feed.