EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 6, Problem 6.38Q
To determine
The sketch of strain distribution in rolling.
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Two high rolling mill setup has been used to reduce the thickness of a plate from 40 mm at the
maximum draft per pass to become 34 mm after the last pass. The width of the rolled material is
560 mm and the roll diameter is 560 mm. The material has a strength coefficient of 260 MPa and a
strain hardening exponent of 0.18. The coefficient of friction during the process was 0.085.
Determine the following:
1- Number of passes required to perform the reduction process =
2- Strain of the last pass =
3- Average flow stress of the last pass =
MPa
4- The rolling force to roll the last pass =
Please give me full explanation in 1hour do it fast
A 4-in-thick aluminum slab is 10 in wide and 100 in long. It is reduced in one pass in a two-high rolling mill to a thickness = 3.5 in. The roll rotates at a speed = 12 rev/min and has a radius = 20 in. The aluminum has a strength coefficient = 25,000 lb/in2 and a strain hardening exponent = 0.20. Determine the (a) roll force, (b) roll torque, and (c) power required to accomplish this operation, d) Estimate the GHG emission in an hour for the rolling operation.
0/
Two thick slabs of 300mm each, the first one is used in cold rolling where
μ=0.08 while the second is used in cold rolling where µ-0.5. The mill roll
diameter in each case is the same as 600mm. Determine the max draft
(reduction) in both cases. Discuss the wide difference in results.
Chapter 6 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 6 - Prob. 6.1QCh. 6 - Prob. 6.2QCh. 6 - Prob. 6.3QCh. 6 - Prob. 6.4QCh. 6 - Prob. 6.5QCh. 6 - Prob. 6.6QCh. 6 - Prob. 6.7QCh. 6 - Prob. 6.8QCh. 6 - Prob. 6.9QCh. 6 - Prob. 6.10Q
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A rectangufar workpiece has the following original dimensions: 2a = 120 mm, h = 40 mm and width = 25 mm (see Fig. 6.5). The metal has a strength coefficient of 530 MPa and a strain hardening exponent of 0.26. It is being forged in-plane strain with u = 0.25. Calculate the force required at a reduction of 25%. Use the average- Question 2 Not yet answered Marked out of 5 pressure formula. P Flag questionarrow_forwardWire is drawn through a draw die with entrance angle a= 17°. Starting diameter is 3.0 mm and final diameter = 2.4 mm. The coefficient of friction at the work-die interface = 0.08. The metal has a strength coefficient K = 205 MPa and a strain-hardening exponent n = draw force in this operation. Why are multiple passes usually required to achieve the desired reduction? (Hint: Observe the draw stress value found in this question) 0.20. Determine the draw stress and Lubricant box Initial wire stock (in coil form) Multiple pass/draft drawing Draw die V2, F V3, F shown in figure. Capstan drum (holds multiple loops of wire) (1) (2) (3)arrow_forwardA drawing operation is used to form a cylindrical cup with inside diameter of 75 mm and height of 50 mm. The starting blank size is 140 mm and the stock thickness is 2.4 mm Except that the starting blank size diameter is 160 mm, compute the drawing forceand The holding force given that the tensile strength of the sheet metal = 490MPa and (7)yield strength = 200 MPa.arrow_forward
- In a slab rolling operation, the maximum thickness reduction (del hmax) is given by del hmax = μ²R, where R is the radius of the roll and u is the coefficient of friction between the roll and the sheet. If µ = 0.1, find the maximum angle subtended by the deformation zone at the centre of the roll.arrow_forwardHot rolling is used for simple parts only. Select one: True Falsearrow_forwardEx: Wire is drawn through a draw die with entrance angle 15°. Starting diameter is 2.5 mm and final diameter 2.0 mm. The coefficient of friction at the work-die interface 0.07. The metal has a strength coefficient K=205 MPa and a strain- hardening exponent n = 0.20. Determine the draw stress and draw force in this operation.arrow_forward
- In open-die forging, a disc of diameter 200 mm and height 60 mm is compressed without any barreling effect. The final diameter of the disc is 400 mm. The true strain isarrow_forwardBriefly explain various methods available for breakdown passes in rolling. Explain their applications.arrow_forwardThickness of the plate is reduced from 40mm to 20mm by succesive cold rolling passes using identical rolls of diameter 600 mm. Assume that there is no change in width. If the coefficient of friction b/w the rolls and the workpiece is 0.1. Determine the minimum number of passes required?arrow_forward
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