Manufacturing Technology 1: Metal Forming Processes
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Questions and Answers

What is the primary advantage of cold extrusion over hot extrusion in terms of material properties?

  • Reduced ram force
  • Increased ductility
  • Improved grain flow characteristics
  • Increased strength due to strain hardening (correct)

    • Which of the following metals is most ideal for extrusion, both hot and cold?

  • Magnesium
  • Copper
  • Aluminum (correct)
  • Zinc

    • What is the primary purpose of heating the billet in hot extrusion?

  • To reduce the ram speed
  • To increase the ductility of the metal (correct)
  • To eliminate oxide layers
  • To reduce the strength of the metal

    • What is the term used to describe high-speed cold extrusion?

    <p>Impact extrusion</p> Signup and view all the answers

    What is the primary advantage of cold extrusion in terms of production?

    <p>Increased production rates</p> Signup and view all the answers

    What is the primary advantage of hot extrusion in terms of shape complexity?

    <p>More complex shapes can be achieved</p> Signup and view all the answers

    What is the primary purpose of metal forming in manufacturing processes?

    <p>To change the shape of metal work pieces into a suitable form for manufacturing</p> Signup and view all the answers

    What is the characteristic of bulk deformation processes?

    <p>They involve significant deformation and a small surface area-to-volume ratio</p> Signup and view all the answers

    What is an example of a sheet metalworking process?

    <p>Bending</p> Signup and view all the answers

    What is the term used to describe metal parts made on a stamping press?

    <p>Stampings</p> Signup and view all the answers

    What is the classification of metal forming processes that involves bending, forming, and shearing operations?

    <p>Sheet metal working</p> Signup and view all the answers

    What is the category of deformation processes that includes forging, extrusion, and rolling?

    <p>Deformation processes</p> Signup and view all the answers

    Deformation processes are characterized by which of the following?

    <p>Starting material is a ductile solid</p> Signup and view all the answers

    What is the primary purpose of heating the work material before forming?

    <p>To increase ductility and for other reasons</p> Signup and view all the answers

    Which of the following is NOT a deformation process?

    <p>Soldering</p> Signup and view all the answers

    What is the primary requirement for a material to be shaped through deformation processes?

    <p>The material must be sufficiently ductile</p> Signup and view all the answers

    Which of the following deformation processes involves shaping a part using a drop hammer?

    <p>Forging operation</p> Signup and view all the answers

    What is the term for the process of shaping a metal part by applying forces that exceed its yield strength?

    <p>Deformation process</p> Signup and view all the answers

    What is the primary purpose of tube drawing?

    <p>To reduce the diameter or wall thickness of seamless tubes</p> Signup and view all the answers

    What is the limitation of tube drawing without a mandrel?

    <p>It lacks control over the inside diameter and wall thickness</p> Signup and view all the answers

    What is the purpose of lubrication in hot extrusion?

    <p>To reduce friction and provide thermal insulation</p> Signup and view all the answers

    What is the purpose of a fixed mandrel in tube drawing?

    <p>To establish inside diameter and wall thickness during the operation</p> Signup and view all the answers

    What is the advantage of using a floating plug in tube drawing?

    <p>It removes the limitations on work length</p> Signup and view all the answers

    What is the primary material used as a lubricant in hot extrusion?

    <p>Glass</p> Signup and view all the answers

    What is the primary characteristic of the drawing process?

    <p>It is a cold working process</p> Signup and view all the answers

    Which process is used to produce the initial tubing?

    <p>Extrusion</p> Signup and view all the answers

    Why is tube drawing sometimes referred to as tube sinking?

    <p>Because it is used for diameter reduction</p> Signup and view all the answers

    What determines the force that can be applied in pulling the wire through the die in continuous wire drawing?

    <p>The strength of the material</p> Signup and view all the answers

    What is the typical material used in wire drawing?

    <p>Steel, copper, aluminum and their alloys</p> Signup and view all the answers

    What is the purpose of using a series of progressively smaller dies in continuous wire drawing?

    <p>To reduce the size of the wire to the final-size section</p> Signup and view all the answers

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