Assignment 5

Assume the uncut chip thickness is 0.2 mm and the chip thickness is 0.25 mm, the rake angle of the tool is 20 degree. What is the shear angle? 20 degrees 1 degree 46 degrees

46 degrees

A cylindrical part with diameter of 50 mm is rotating at 600 revolutions per minute (rpm). What is the surface speed? A: about 94 m/min (meters per minute) B: about 94 mm/min C: about 94 mm/sec

A: about 94 m/min (meters per minute) (V=πD1N)

Suppose a cylindrical part is turned by one pass. The diameter is reduced from 60 mm to 58 mm. What is the depth of cut (DOC)? A: 2 mm B: 1 mm C: 0.5 mm D: 0.25 mm

B: 1 mm (DOC=(D1-D2)/2)

Ductile materials tend to result in ____________ chips. continuous discontinuous

continuous

Generally speaking, as the hardness of a cutting tool material increases, the toughness will ____ . decrease not change increase

decrease

BUE (built-up edge) is undesirable for ________ cutting but sometimes is desirable for ______ cutting. rough/finish finish/rough

finish/rough

Generally speaking, as the cutting temperature increases, the tool wear will ____ . not change increase decrease

increase

Generally speaking, increasing the speed will ____ the cutting temperature. increase decrease not affect

increase

Generally speaking, increasing the speed, feed, or depth of cut will ____ the power requirement. increase decrease not affect

increase

In orthogonal cutting, the cutting edge of the tool is _____________ to the direction of the relative velocity between the tool and the workpiece. perpendicular parallel formed about 45 degree angle

perpendicular