Ain Shams UniversityFaculty of EngineeringNew Programs

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Spring 2015MDP l2l: Manufacturing Technology 1.

Assignment No" 2

1- \Mhat is the effect of temperature on the microstructure of metals at forgingprocess?

2- What are types of forming processes according to temperatures?

3- $how the ranges of temperature for cold, warm and hot forging.

4- :What are typ* of forging processes?

5- Compare between hot and cold forming6- What are benefits of lubrication?7 - How do we choose the lubrications?8- What is the effect of temperature on the followings? Barrel shape, friction

and tool wear.9- What are factors which affecting on the barrel shape?

10- What load w-ouldbe requiredto forge a25 cm length and 50 cm

diameter cylindrical steel billet to 7 5o/o of its original length between two

flat dies if the forging occurs at

1- At room temperature with coefficient of friction of 0.07 andyield stress

of steel of 250 MPa.2- At 900'C ut yield stress of 10 MPa and friction coefficient of 0.1.

11- Compare the forging force to give 30% reduction in height by using

upsetting in the following cases.

1- Cylindrical billet of 60 mm height and 3 0 mm diameter.

2- Cylindrical billet of 6 mm height and 30 mm diameter.

The coefficient of friction is 0.07 and stress coefficient factor is 300MPa

and strain hardening coefficient of 0 .25.

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