Estimate the machining time, Mechanical Engineering

Assignment Help:

Estimate the Machining Time

A hollow workpiece of 60 mm outside diameter and 150 mm length is held on a mandrel among centers and turned all over in 4 passes. If the approach length = 20 mm, over travel = 12 mm, average feed = 0.8 mm/rev., cutting speed = 30 m/min, estimate the machining time.

Solution

We know that,

Cutting speed = π DN /1000

or,         30 = ( 60 × π N )/1000

N = 159 rpm

 Now, the total (length) traveled by the tool in a single pass in given by :

L = 150 + 20 + 12

= 182 mm

Therefore, the total length traveled by the tool in its 4 passes is given by :

L1 = 182 × 4 = 728 mm

Now, the machining time (T) is given by following:

T =       L1/ feed × N

      =    728 / (0.8 × 1.59)

      = 5.72 minutes


Related Discussions:- Estimate the machining time

Battery discharges frequently motorcycle problem, If Battery Discharges Fre...

If Battery Discharges Frequently Causes of Problem Remedy Electrolyte specific gravity NG Charging not done fully

Thermodynamic, what is the difference between intrinsic and extrinsic proce...

what is the difference between intrinsic and extrinsic process?

Show dike heights and distance from containers, Wall-type bunds / dikes for...

Wall-type bunds / dikes for storage compounds should be from 0.5 m to 1.5 m high (1.5 ft. - 5 ft. - check local codes and regulations), depending on the required containment capaci

Solve the equations by factorization method, a) Answer the following equati...

a) Answer the following equations by Factorization method 10x+y+z =12 ; 2x+10y+z =13 ; 2x+2y+10z=14 b) Apply Gauss-Seidal Iteration method to solve the equations 20x+y-2z

Find out also the loss of energy through impact, Find out also the loss of ...

Find out also the loss of energy through impact: Example 1. A bullet weighing 0.1 newton horizontally fired with a velocity of 80 metres/sec hits a wooden block, weighin

Mechnics of solids thick cylinder, a compound cylinder is composed of a tub...

a compound cylinder is composed of a tube of 250mm internal diameter at 25mm wall thickness.it is shrunk on to a tube of 200mm internal diameter. the radial pressure at the junctio

Compute the displacement of the particle, Compute the displacement of the p...

Compute the displacement of the particle: The acceleration time diagram for particle is as specified below .Computed velocity of the particle at several time intervals, plot v

Newton s rings, how i make assigment for newton s ring

how i make assigment for newton s ring

Equiliubrium, Review questions condition of equilibrium grade 11 unit 7

Review questions condition of equilibrium grade 11 unit 7

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd