(SI units) A series OI cold-rolling operations are to be used to reduce the thickness of a metal plate from 50 mm to 20 mm in a reversing two-high mill. Roll diameter = 600 mm and coefficient of friction between rolls and work = 0.15. The specification is that the draft is to be equal on each pass. Determine (a) the minimum number of passes required and (b) draft for each pass.

Q: A plate of 270 mm wide and 25 mm thick from carbon steel. A two-high rolling mill is used to reduce…

A: (a) Calculate the contact length of arc. Lp=R∆H=60025-20=54.77 mm Calculate the true strain.…

Q: Rolling: A rolling operation is performed on a 5 mm thick sheet of low carbon steel (K=530, n=0.26…

A: Given:To find:

Q: If coefficient of friction µ in a rolling process is 0.5 and radius of roller is 1,000 mm, what is…

A: Given, Coefficient of friction = μ = 0.5 Radius of the roller = R = 1000 mm   Maximum possible…

Q: A 300-mm-wide strip 25-mm thick is fed through a rolling mill with two powered rolls each of radius…

A: The answer has been attached in the form of images as follows:

Q: Figure 1. shows the rolling operation. Determine the position bn. of the neutral point? Neglect…

A:

Q: 18.18 (SI units) A hydraulic forging press is capable of exerting ello a maximum force = 1,000,000…

A:

Q: ti-pass cold rolling operation is to be used to red mill. The following data is provided for the ro…

A:

Q: A cylindrical working part is subjected to a forging landfall operation. The blank is 3.0 in. high…

A: volume of workpiece=π4×22×3=9.4247 in3

Q: )Give the reasons to use closed die forging.

A: Forgings minimize wasted material and are cost-effective, quick, and retain their durability under…

Q: single pass rolling process is used with 410 mm diameter steel rollers and a strip of width 140 mm…

A: Given:d=410 mmw=140 mmt=8 mm

Q: A hot rolling operation is being carried out on 250 mm wide and 25mm thick low carbon steel…

A: Calculate the final thickness. hf=1-0.2ho   =0.8×25   =20 mm Calculate the strain. Strain ε=lnhohf…

Q: - 400 mm wide 25 mm thick strip is fed through a rolling mill with two powered olls each of radius…

A:

Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.