Exp 1 Chip Formation Experment
Exp 1 Chip Formation Experment
Exp 1 Chip Formation Experment
Experiment No (1)
1. Introduction:
In the machining process, layers of metal are removed from a workpiece by the action
of a wedge-shaped cutting tool. The piece of metal removed is called a chip, and in
practice it is possible to produce three distinct types of chip: a continuous chip, a
continuous chip with a built-up edge, and a discontinuous chip. The type of chip
produce in a particular machining operation depends on the work and tool material,
the geometry and speed of cutting process, and the existence or absence of
lubrication. The purpose of the experiment is to illustrate the various types of chip that
can be produced during machining and to examine the effect of lubrication on chip
formation.
2. Equipment:
a. Engine lathe or shaper.
b. Workpiece materials in tube form (for lathe) or plate form (for shaper) to
include:
i. Copper.
ii. A brass containing 70 percent copper and 30 percent zinc.
iii. Pure iron or mild steel.
c. Two high-speed steel cutting tools, one with a normal rake of 15 degree
and the other with a normal rake of 35 degree
d. A small quantity of carbon tetrachloride