This problem from Degarmo's textbook is our report. WorkpieceWoVoContactareaVfWoRoll6. Compare the forming processes of wire drawing, conven-tional extrusion, and continuous extrusion with respect focontinuity, reduction in area possible in a single operation,possible materials, speeds, typical temperatures, and otherimportant processing variables.7. Figure 16-B shows the rolling of a wide, thin strip where thewidth remains constant as thickness is reduced. Materialenters the mill at a rate equal to towovo and exits at a rate oftjw,Vf. Because material cannot be created or destroyed,these rates must be equal, and the w. terms will cancel. As aresult, vf is equal to (t/tf)vo. The material enters at velocityVo and accelerates to velocity vf as the material passesthrough the mill. For stable rolling, the velocity of the rollsurface, v,, which is a constant, must be a value between v,and vf. For these conditions, describe the relative slidingbetween the strip and the rolls as the strip moves through theregion of contact.go/global/degarmo Bulk-Forming ProcessesCHAPTER I6WorkpieceWoVoContacttoareaVfStrip rollingFIGURE 16-Bwhere the width of the stripremains unchanged. The linesacross the workpiece identify thearea of contact with the rolls. Thetop roll has been removed forease of visualization.WoVrRolltfse L is proportional to the roll radius, R, K1L can beced by K2R so the force becomes proportional to the6. Compare the forming processes of wire drawing, conven-tional extrusion, and continuous extrusion with respect to

6) PARAMETER WIRE DRAWING CONVENTIONAL EXTRUSION Reduction in area less more…

6. Compare the forming processes of wire drawing, conven- tional extrusion, and continuous extrusion with respect to continuity, reduction in area possible in a single operation, possible materials, speeds, typical temperatures, and other important processing variables.

6. Compare the forming processes of wire drawing, conven- tional extrusion, and continuous extrusion with respect to continuity, reduction in area possible in a single operation, possible materials, speeds, typical temperatures, and other important processing variables.

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

A cylindrical billet that is 100 mm long and 50 mm in diameter is reduced by indirect (backward) extrusion to a 20 mm diameter. The die angle is 90°. In the Johnson equation, a = 0.8 and b = 1.4. In the flow curve for the work metal, the strength coefficient = 800 MPa and strain hardening exponent = 0.13. Determine (a) extrusion ratio, (b) true strain (homogeneous deformation), (c) extrusion strain, (d) ram pressure, and (e) ram force
1. A component is designed to be hot forged in an impression die. The projected area of the product is 5800 mm2. During the forging process flashing is formed so that the area including the flash will be 8900 mm2. The part geometry is considered to be simple and the heated work material yields at 92 MPa. Calculate the maximum force required to perform the operation. 2. What are the advantages and disadvantages to forge a product through the open forging process, rather than to machine it from the same material?
A cylindrical billet that is 100 mm long and 50 mm in diameter is reduced by indirect (backward) extrusion to a 20 mm diameter. The die angle is 90°. In the Johnson equation, a = 0.8 and b = 1.4. In the flow curve for the work metal, the strength coefficient = 800 MPa and strain hardening exponent = 0.13. Determine (a) extrusion ratio, (b) true strain (homogeneous deformation), (c) extrusion strain, (d) ram pressure, and (e) ram force Please answer d and e (a) Calculate the extrusion ratio. r=6.25 (b) Calculate the true strain. εtrue=1.8333 (c) Calculate the extrusion strain by using Johnson's equation. εext =3.366
1) A upset forging operation is performed in an open die. The initial size of the workpart is: Do = 63 mm, and ho = 100 mm. The part is upset to a diameter = 70 mm. The work metal has a flow curve with strength coefficient = 600 MPa and strain hardening exponent= 0.22. Coefficient of friction at the die-work interface = 0.40. Determine (a) final height of the part, and (b) maximum force in the operation.
Forging processes may be characterized by die work limitation. This categorization yields three basic types.
Q#3:(b) Explain the differences between Forward Extrusion and Reverse Extrusion processes
A 3in long and 1in diameter billet is extruded in a direct extrusion operation with an rx = 4.0. The extrusion has a cross section. The angle of the die (half angle) is 90o. The work metal has a resistance coefficient of 60ksi and a strain hardening exponent of 0.18. Use Johnston's formula with a = 0.8 and b = 1.5 to estimate the extrusion stress. Determine the pressure applied to the end of the billet when the piston moves forward.
A spool of wire has a starting diameter of 2.5 mm. It is drawn through a die with an opening that is 2.1 mm at a speed of 0.3 m/s. The worked metal has a strength coefficient of 450 MPa and a strain-hardening coefficient of 0.26. Assume the drawing is performed at room temperature and that the frictional and redundant work together constitute 35% of the ideal work of deformation. Calculate the power required to carry out the operation
Please answer to both parts: (a) Explain the function of a dummy block in the Direct Extrusion Process. (b) Explain the differences between Forward Extrusion and Reverse Extrusion processes.
Q#1: (a) Explain the advantage of corner radii of punch and die in Sheet Metal Drawing Process. (b) Explain the disadvantages of Tube Drawing process in which mandrel is not used.
A cylindrical billet that is 100 mm long and 50 mm in diameter is reduced by indirect (backward) extrusion to a 20 mm diameter. The die angle is 90°. In the Johnson equation, a = 0.8 and b = 1.4. In the flow curve for the work metal, the strength coefficient = 800 MPa and strain hardening exponent = 0.13. Determine d) ram pressure, and (e) ram force
A plate that is 260 mm wide and 27 mm thick is to be reduced in a single pass in a two‑high rolling mill to a thickness of 22 mm. The roll has a radius = 510 mm, and its speed = 25 m/min. The work material has a strength coefficient = 235 MPa and a strain hardening exponent = 0.21. Determine (a) roll force, (b) roll torque, and (c) power required to accomplish this operation