Explain machining allowance, Mechanical Engineering

Assignment Help:

Q. Explain Machining allowance?

Machining allowance or finish allowance indicates how much larger the rough casting should be over the finished casting to allow sufficient material to ensure that machining will "clean up" the surfaces. The amount of finishing allowance depends upon the material of the    casting, its size, volume of production, method of moulding, configuration of the casting.

 

Material  Cast

 

Overall length of external surfaces, cm

 

0 to 30

 

30 to 60

 

60 to 105

 

105 to 150

 

Al alloys

 

1.6

 

3.2

 

3.0

 

4.8

 

Brass, Bronze

 

1.6

 

3.2

 

3.0

 

4.8

 

C.I

 

2.4

 

3.2

 

4.8

 

6.4

 

C.S

 

3.2

 

4.8

 

6.0

 

9.6

Table: Typical Machining Allowance for Sand Casting


Related Discussions:- Explain machining allowance

What is the make group of euler operators, The Make Group of Euler Operator...

The Make Group of Euler Operators The Make group consists of four operators for adding some elements into the existing model creating a new one, and a Make-Kill operator for ad

Derive the equation for the shape of the surface, (Rigid body rotation) De...

(Rigid body rotation) Derive the equation for the shape of the surface zsurf(rsurf) for a rigid-body rotation of water at angular speed (rad/sec). Follow this process: 1) S

Mechanical properties of materials, A tensile test on a specimen having an ...

A tensile test on a specimen having an initial diameter of 13.11 mm and an initial gauge length of 200.0 mm, gave the following data:

Characterised punching shear failure in bearing capacity, How can punching ...

How can punching shear failure are characterised in bearing capacity? Punching Shear Failure This mode of failure is characterised by large deformations beneath the footing

Cross drainage works, Cross Drainage Works: Culverts A large ...

Cross Drainage Works: Culverts A large number of culverts are needed for taking care of the streams crossing the railway lines. The culverts can be one of the followi

Up milling and down milling, table representing the differences between up ...

table representing the differences between up milling and down milling

Coefficient expansion of transformer oil, What is the coefficient expansion...

What is the coefficient expansion of transformer oil? Ans) Transformers can be filled with several types of Refined Mineral Oil. That coefficient is something you would find in

Stress strain curves, Stress Strai n Curves (Tension): When a bar or ...

Stress Strai n Curves (Tension): When a bar or specimen is subjected to a gradually increasing axial tensile load, the strains and stresses can be found out for number of loa

Explain the uses of residual soils, Explain the uses of Residual soils ...

Explain the uses of Residual soils Residual soils may be underlain by sloping rock which may contain weathered seams. The possibility of foundations sliding on these seams have

Explain internal broaching - types of broaching, Explain Internal Broaching...

Explain Internal Broaching - Types of Broaching Internal broaching operation is adopted for producing internal surface such as holes, keyways and teeth of an internal gear for

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