Question

1.

a)Which of the seven basic chip formation processes are single point and which are multiple point?

b)Why is metal cutting shear strain such an important parameter?

c)Why does the cutting force Fc increase with increased Feed or DOC?

d) The cutting conditions in a turning operation are: v = 2.1 m/s, f = 3.5 mm/revolution, and d = 0.24mm. The tool rake angle = 5 which produces a deformed chip thickness tc = 0.5 mm. Determine: (a) shear plane angle, (b) shear strain, and (c) material removal rate. Use the orthogonal cutting model as an approximation of the turning process.

Answer 1

a) there are different types of metal cutting or chip formation process , among them

Single point operation- drilling , turning, shaping and planning

Multiple point operation- milling, grinding, broaching

b) shear strain is an important parameter in metal cutting.it occurs along the shear plane and it's value is an indication of the amount of deformation that metal undergoes during the process of chip formation and metal cutting.

c) feed or depth of cut is generally the thickness of metal the tool cuts during metal cutting so more is the thickness higher the force tool has to apply to make the metal deform. That's why cutting force (Fc) is increases with incresei in feed or depth of cut.

d)