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

Define flavorings in iges, Define Flavorings in IGES Flavorings : IGE...

Define Flavorings in IGES Flavorings : IGES contained several ways to capture the same information, which made proper interpretation largely dependent on the particular  "fla

Principal stress and principal plane, Use the graphics and the equation to ...

Use the graphics and the equation to define the term principal stress and principal planes.

Explain cutting speed-material removal rate & machining time, Determine- cu...

Determine- cutting speed, Material removal rate and Machining time. A 150 mm long 12.7 mm diameter stainless steel rod is being turned to 12.19 mm diameter on a centre lathe.

Adhesives, Adhesives Adhesives are a substance able of holding materia...

Adhesives Adhesives are a substance able of holding materials together. A joint is formed among two solids is called adherends with a thin layer of adhesive among them. Mainly

List and explain the five stages of change, List and explain the five stage...

List and explain the five stages of change. What stage are you at in regards to your own exercise program and explain why? (50-100 words) Refer to page 4 of The Essential Guide to

Why is stress relieving in post-weld treatment necesaary, In case of welded...

In case of welded vessels why is stress relieving in the form of post-weld treatment necessary? When a metal is welded together the point at which two surfaces are joined are s

Material and tribology, The Cu-Sb system contains 2 eutectics, 1 eutectoid,...

The Cu-Sb system contains 2 eutectics, 1 eutectoid, 1 peritectic and 1 peritectoid. Mark them all on the figure, write down the temperature and composition of each point, and ident

Determine the acceleration of the body, Determine the acceleration of the b...

Determine the acceleration of the body: Two weights P and Q are associated by the arrangement shown in Figure. Neglecting friction and the inertia of the pulleys and cord, det

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