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

Explain types of gas welding process, Types of Gas Welding Process Gas ...

Types of Gas Welding Process Gas welding includes all those welding processes in which gas flame is used as a heat source for melting metals. It is further divided into three m

Machine design, how an axial thrust is a generated in a helical gear

how an axial thrust is a generated in a helical gear

Engineering curves, how to draw parabola by parallelogram method..?

how to draw parabola by parallelogram method..?

Bevel gear and shaft analysis, I have a bevel gear and shaft and I want to ...

I have a bevel gear and shaft and I want to know the maximum load that can be applied on it. also I have no information about it, what kind of information is needed for this calcul

Explain principal process for abrasive jet cutting machines, Explain Princi...

Explain Principal Process for Abrasive Jet Cutting Machines Abrasive particles are fed from the hopper in to the mixing chamber by regulating device as shown in figure.

Determine the half-space method, Half-space Method Solid representation...

Half-space Method Solid representation is based fundamentally on the notion that a physical object divides an n-dimensional space E n into two regions: interior and exterior,

Test analysis, Test Analysis:             First new sand blasting mach...

Test Analysis:             First new sand blasting machine prototype had arrived Asia. Installation of the machine had been carry out by external vendor. We test run the machi

What is the specific weight of the timber, (Buoyancy; force & moment balanc...

(Buoyancy; force & moment balance) A partially submerged, homogeneous timber is 0.15m by 0.35m in cross-section. What is the specific weight of the timber and the tension in the r

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