Download GTU B.Tech 2020 Winter 7th Sem 2171913 Metal Forming Analysis Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2171913 Metal Forming Analysis Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2171913 Date:19/01/2021
Subject Name:Metal Forming Analysis
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Draw flow curves for 1) rigid- ideal plastic 2) rigid plastic 3) elastic
03
plastic.

(b) Differentiate between cold forming, hot forming and warm forming.
04

(c) Derive the relationship between Yield strength in Shear and Yield
07
strength in Tension according to Von Mises' hypothesis of yielding.


Q.2 (a) Draw different types of rolling mills used in rolling process.
03

(b) Explain spring back effect in bending process.
04

(c) Draw and explain typical stress-strain diagram for ductile material.
07




Q.3 (a) Explain compound and progressive dies.
03

(b) Discuss Anisotropy and its effects in deep drawing.
04

(c) Discuss stresses developed in deep drawing process with neat sketch.
07




Q.4 (a) Differentiate blanking and punching operation with sketch.
03

(b) Discuss direct and indirect extrusion with neat sketch.
04

(c) Discuss stress and strain in bending.
07
Q.5 (a) What is upset forging?
03

(b) Discuss various rolling defects.
04

(c) Derive the formula for Rolling Load using Slab Method with usual
07
notations.



Q.6 (a) Define (i) dry drawing (ii) wet drawing (iii) tube drawing.
03

(b) Discuss effect of friction in forming process.
04

(c) Analysis of compression of circular disc with slab method
07
Q.7 (a) Discuss Forging defects.
03

(b) Discuss effect of temperature on yield strength.
04

(c) Explain various operations performed on sheet-metal press machine.
07




Q.8 (a) Define angle of bite and discuss its effect in rolling process.
03
(b) Briefly explain Forming limit curve with a neat sketch.
04
(c) With neat sketch explain the steps of close die forging process.
07

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