Wire 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 = 0.20. Determine the draw stress and 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) 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)

Wire 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 = 0.20. Determine the draw stress and 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) 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)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Ex: 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.
A cylindrical part with initial diameter of 45 mm and the initial height of 40 mm is upset forged in an open die to a height = 25 mm. The strength coefficient is 650 MPa and strain- hardening exponent is 0.12. Qa =1.11 (Qa takes into account both friction and workpiece geometry). Calculate the force required for upsetting this part at room temperature. O 1786 kN O 1648 kN O 1247 kN O 1109 kN O none of them
The team performs a cold heading operation to produce the head on a steel nail. The strength coefficient for this steel is K = 550 MPa, and the strain hardening exponent n = 0.24. Coefficient of friction at the die- work interface = 0.10. The wire stock out of which the nail is made is 4.75 mm in diameter. The head is to have a diameter = 9.5 mm and a thickness = 1.5 mm. (a) What length of stock must project out of the die in order to provide sufficient volume of material for this upsetting operation? (b) Compute the maximum force that the punch must apply to form the head in this open-die operation. Discuss the result?
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 =
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 question
5) A steel specimen of rectangular cross section with 120 mm width, 180 mm thickness and 90 mm height was upset at room temperature by open-die forging to a height of 55 mm. If the strength coefficient and strain hardening exponent of this material were 1015 MPa and 0.17 respectively, the coefficient of friction is 0.2, and assuming that the thickness would not change during forging; determine the required upsetting force at the end of stroke.
A cylindrical 4135 cold-rolled steel workpiece has an upsetting load applied at room temperature using an open-die forging with flat dies to a new height, ha = 50 mm, as shown below. The initial diameter is do = 220 mm, the initial height is ho = 180 mm. 4135 cold-rolled MPa=1100 Psi= 16000 Strain hardening exponent, n = 0.14 A) What is the diameter of the forging at the end of the forging stroke? B) What is the longitudinal true strain of the forging at the end of the forging stroke? C) What is the true (flow) stress required in the material at the end of the forging stroke? D) Using the average pressure formula, what is the corresponding coefficient of friction if the upsetting force at the end of the stroke is 170 MN?
A wire is drawn through a draw die with an entry angle = 15o. The starting diameter is 0.100 in. And the final diameter = 0.080 in. The coefficient of friction at the work-given interface = 0.07. The metal has a coefficient of resistance K = 30,000 psi and a strain hardening exponent of n = 0.20. Determine the stretching force and the stretching force in this operation.
A spool of copper wire has a starting diameter of 2.5 mm. It is drawn through a die with an opening that is 2.1 mm. The entrance angle of the die = 18°. Coefficient of friction at the work die interface is 0.08. The pure copper has a strength coefficient = 300 MPa and a strain hardening coefficient = 0.50. The operation is performed at room temperature. Determine (a) area reduction, (b) draw stress, and (c) draw force required for the operation.
Manufacturer process A compound die will be used to blank and punch a large rectangle (90x150mm blank dimensions) out of 6061ST aluminum alloy sheet stock 3.5 mm thick. The diameter of inside hole is 25 mm. The aluminum sheet metal has a tensile strength = 310 MPa. Determine the minimum tonnage press (force) to perform the blanking and punching operation (1) assume that blanking and punching occur simultaneously and (2) assume that punching occurs first, then blanking. Take: Ac=0.06
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.
Aluminum rod stock with a starting diameter = 0.50 in is drawn through a draw die with an entrance angle = 13°. The final diameter of the rod is = 0.375 in. The metal has a strength coefficient = 25,000 lb/in² and a strain hardening exponent = 0.20. Coefficient of friction at the work-die interface = 0.1. Determine (a) area reduction, (b) draw force for the operation.