solved problems on taper turning methods

SOLVED PROBLEMS ON TAPER TURNING METHODS

Problem 2.1

Determine the conicity of the workpiece when the major and minor diameters of the work are 100 mm and 70 mm. Length of the workpiece is 120 mm.

Given data:

D = 100 mm

d = 70 mm

l = 120 mm

Solution:

Conicity, 1/4 means the amount of taper is 1:4 or in a length of 4 mm, the diameter of workpiece is reduced by 1 mm.

Problem 2.2

Find the angle of taper for the workpiece having a major diameter 80 mm, minor diameter 70 mm and length 150 mm.

Given data:

D = 80 mm

d =70 mm

l = 150 mm

Solution:

Problem 2.3

A shaft 180 mm long is to be turned in a lathe whose larger diameter is 100 mm and smaller diameter is 85 mm. Find the angle at which the compound rest should be set up.

Given data:

l = 180 mm

D = 100 mm

d = 85 mm

Solution:

During taper turning operation, the compound rest should be setup for the half taper angle. It is given by

Problem 2.4

Calculate the amount of set over on the tailstock of a lathe for turning a workpiece 120 mm long if the taper is 90 mm long. The major and minor diameters of the workpiece ends are 40 mm and 10 mm respectively.

Given data:

L = 120 mm

Length of taper, l = 90 mm

D = 40 mm

d = 10 mm

Solution:

Problem 2.5

A shaft 250 mm long has a taper of 1:50 for a distance of 150 mm from one end. The maximum diameter of the shaft is 75 mm. What length of the dead centre should be set out of the lathe? Also calculate the minimum diameter of the shaft.

Given data:

L = 250 mm 

Taper = 1:50

l = 150 mm

D = 75 mm

Solution:

Problem 2.6

Calculate the amount of set over required for the tailstock for turning a workpiece of length 300 mm if the taper is 1:100.

Given data:

L = 300 mm 

Taper = 1:100

Solution:

Problem 2.7

A shaft 500 mm long has a taper of 100 mm/m for a distance of 200 mm from one end. The maximum diameter of the shaft is 150 mm. Determine the amount of set over required.

Given data:

L = 500 mm

Taper = 100 mm/m

l =200 mm

D = 150 mm

Solution: