Q1. Chose the correct answer:-1. Which of the following are variations of sheet-metal-bending operations: (a) coining, (b) flanging, (ohemming, (d) ironing, (e) notching, (D shear spinning, (g) trimming, and (h) tube bending?2. Springback in a sheet-metal-bending operation is the result of which one of the following: (a) elasticmodulus of the metal, (b) elastic recovery of the metal, (c) overbending, (d) overstraining, or (e) yield strengthof the metal?3. The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal(one correct answer): (a) compressive strength, (b) modulus of elasticity, (c) shear strength, (d) strain rate, (e)tensile strength, or (f) yield strength?4. A circular sheet-metal slug produced in a hole punching operation will have the same diameter as (a) thedie opening or (b) the punch?5. As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die shouldbe (a) decreased, (b) increased, or (c) remain the same?6. Which of the following stress or strength parameters is used in the computation of the force in an extrusionoperation (one best answer): (a) average flow stress, (b) compression strength, (c) final flow stress, (d) tensilestrength, or (e) yield strength?7. Notching is the operation of...(a) Removal of excess metal from the edge of a strip to make it suitable for drawing without wrinkling, (b)Cutting of the excess metal at edge which was required for gripping purpose during press working operation,(c) Cutting in a single line across a part of the metal strip to allow bending or forming in progressive dieoperation while the part remains attached to the strip, (d) Punching in which punch is stopped as soon as themetal fracture is completed and metal is not removed but held in hole, (e) None of the above.8. The important mechanical property of a material for extrusion purposes is...(a) Continuity, (b) Ductility, (c) Elasticity, (d) Plasticity, (e) Brittleness.9. The increase in hardness due to cold working is called...(a) Cold hardening, (b) Hot hardening, (c) Work hardening, (d) Age-hardening.10. Swaging is the operation..(a) In which the edges of sheet are turned over to provide stiffness and a smooth edge, (b) Of producingcontours in sheet metal and of bending previously roll formed sections(c) In which a series of impact blows are transferred on dies so that solid or tubular work changes in cross-section or geometric shape(d) Employed to expand a tubular or cylindrical part(e) None of the aboveThe answer maybe more than onechoice in thepoint below

1 Flanging and hemming are variation of sheet metal bending operations. Hence option B and C are the…

1. Which of the following are variations of sheet-metal-bending operations: (a) coining, (b) flanging, (e hemming, (d) ironing, (e) notching, () shear spinning, (g) trimming, and (h) tube bending? 2. Springback in a sheet-metal-bending operation is the result of which one of the following: (a) elastic modulus of the metal, (b) elastic recovery of the metal, (c) overbending, (d) overstraining, or (e) yield strength of the metal? 3. The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal (one correct answer): (a) compressive strength, (b) modulus of elasticity, (c) shear strength, (d) strain rate, (e) tensile strength, or (f) yield strength? 4. A circular sheet-metal slug produced in a hole punching operation will have the same diameter as (a) the die opening or (b) the punch?

1. Which of the following are variations of sheet-metal-bending operations: (a) coining, (b) flanging, (e hemming, (d) ironing, (e) notching, () shear spinning, (g) trimming, and (h) tube bending? 2. Springback in a sheet-metal-bending operation is the result of which one of the following: (a) elastic modulus of the metal, (b) elastic recovery of the metal, (c) overbending, (d) overstraining, or (e) yield strength of the metal? 3. The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal (one correct answer): (a) compressive strength, (b) modulus of elasticity, (c) shear strength, (d) strain rate, (e) tensile strength, or (f) yield strength? 4. A circular sheet-metal slug produced in a hole punching operation will have the same diameter as (a) the die opening or (b) the punch?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

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.

Question

Q1. Chose the correct answer:-
1. Which of the following are variations of sheet-metal-bending operations: (a) coining, (b) flanging, (o
hemming, (d) ironing, (e) notching, (D shear spinning, (g) trimming, and (h) tube bending?
2. Springback in a sheet-metal-bending operation is the result of which one of the following: (a) elastic
modulus of the metal, (b) elastic recovery of the metal, (c) overbending, (d) overstraining, or (e) yield strength
of the metal?
3. The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal
(one correct answer): (a) compressive strength, (b) modulus of elasticity, (c) shear strength, (d) strain rate, (e)
tensile strength, or (f) yield strength?
4. A circular sheet-metal slug produced in a hole punching operation will have the same diameter as (a) the
die opening or (b) the punch?
5. As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die should
be (a) decreased, (b) increased, or (c) remain the same?
6. Which of the following stress or strength parameters is used in the computation of the force in an extrusion
operation (one best answer): (a) average flow stress, (b) compression strength, (c) final flow stress, (d) tensile
strength, or (e) yield strength?
7. Notching is the operation of...
(a) Removal of excess metal from the edge of a strip to make it suitable for drawing without wrinkling, (b)
Cutting of the excess metal at edge which was required for gripping purpose during press working operation,
(c) Cutting in a single line across a part of the metal strip to allow bending or forming in progressive die
operation while the part remains attached to the strip, (d) Punching in which punch is stopped as soon as the
metal fracture is completed and metal is not removed but held in hole, (e) None of the above.
8. The important mechanical property of a material for extrusion purposes is...
(a) Continuity, (b) Ductility, (c) Elasticity, (d) Plasticity, (e) Brittleness.
9. The increase in hardness due to cold working is called...
(a) Cold hardening, (b) Hot hardening, (c) Work hardening, (d) Age-hardening.
10. Swaging is the operation..
(a) In which the edges of sheet are turned over to provide stiffness and a smooth edge, (b) Of producing
contours in sheet metal and of bending previously roll formed sections
(c) In which a series of impact blows are transferred on dies so that solid or tubular work changes in cross-
section or geometric shape
(d) Employed to expand a tubular or cylindrical part
(e) None of the above
The answer may
be more than one
choice in the
point below

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