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

Introduction to computer, Introduction to Computer: This covers the ma...

Introduction to Computer: This covers the major hardware features of computer graphics systems such as video monitors, keyboard, hard copy devices, and other devices for graph

Trippaing, how thw trippaning process work

how thw trippaning process work

Calculate sif of crack - beam, Calculate sif of crack - beam: An edge ...

Calculate sif of crack - beam: An edge cracked beam carries crack in its central plane whose lengths is 5 mm. A load of 1000 N is applied opposite to crack so that crack would

Dry saturated steam - thermodynamics, Dry Saturated Steam - thermodynamics:...

Dry Saturated Steam - thermodynamics: A dry saturated steam is single phase medium. It does not have any water particle. It can be obtained on complete evaporation of water at

Draw the gas welding system, Draw the Gas welding System and label its part...

Draw the Gas welding System and label its parts. Illustrate the several types of flames used in gas welding along with temperature range.

Explain butt joints, Butt joints- formed by placing the plates edge to edge...

Butt joints- formed by placing the plates edge to edge and welding them. Grooves are sometimes cut (For thick plates) on the edges before welding. According to the shape of the gro

Kinetics of a particle, Kinetics of a Particle: We have seen the effec...

Kinetics of a Particle: We have seen the effect of forces on a particle. The laws of motion for a particle are extended to include a system of particles or a rigid body. It is

Ceramics-refractory and abrasive materials, Ceramics, Refractory And Abrasi...

Ceramics, Refractory And Abrasive Materials Introduction There are some situations in practice where high temperatures are occupied. Besides creating that temperatures en

Essentials of a good boiler , ESSENTIAL S OF A GOOD BOILER: -     Sho...

ESSENTIAL S OF A GOOD BOILER: -     Should be capable of producing the required Steam at   the required pressure for minimum fuel required. -     Should be capable of stan

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