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

Frames, Frames: You have been introduced to the analysis of frames. By...

Frames: You have been introduced to the analysis of frames. By going through this unit, you may identify frames and differentiate them from trusses. The method for analyzing f

Plot velocity and pressure distributions reynolds numbers, The figure shows...

The figure shows a "square cavity flow". In this flow the cavity is filled with a fluid and the lid of the cavity moves with a constant velocity, while the other walls remain stati

Limitations of carnot vapour cycle, Limitations of Carnot vapour cycle: ...

Limitations of Carnot vapour cycle: This equation dignifies that the wider the temperature range, the more efficient is the cycle. ( a )T 3 : In practice T 3 cannot be r

Determine thermal efficiency of the cycle, (a) Compare otto, Diesel and Dua...

(a) Compare otto, Diesel and Dual combustion cycle on the basis of compression ratio, same compression ration and same Heat input and constant maximum pressure and heat supplied.

Calculate the overall fraction defective from all of sample, Calculate the ...

Calculate the overall fraction defective from all of sample: ABC insurance company desires to design a control chart to check whether insurance claim forms are being correctly

Resolving all of the forces normal to the inclined plane, Resolving all of ...

Resolving all of the forces normal to the inclined plane: A body weighing 500 N is resting on an inclined plane making an angle of 30 o with the horizontal. The coefficient o

Battery components , Cell Connectors A cell connector connects the ne...

Cell Connectors A cell connector connects the nearby cell with two terminals of opposite polarity (sign). Post strap connect the plates to the terminal. Electrolyte

Local operator panel for steam generator, Q. Local operator panel for steam...

Q. Local operator panel for steam generator? A local operator's panel is required for operator use during Steam Generator light off. This panel shall contain the following equ

Determine the deflection under the loads, Determine the deflection under th...

Determine the deflection under the loads: Determine the deflection under the loads as shown in Figure Solution ∑ F y   = 0, so that R A + R B  = 80 + 20 = 100 k

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