MNFG 290 Chapter 17-19

• Thin-walled cylinders or cups can be produced from thicker-wall material by ________.

  roll-extrusion
• Cold forming is typically used to produce _______.

  small parts of lower strength metal
• This method of linking independent and dependent variables often employs features which can differ significantly from actual production.

  Experiment
• Which of the following is a disadvantage of hot forming?

  The cost to heat the metal.
• What force/forces is/are the material subjected to during the bending process?

  Compressive and tensile forces
• ________ increases the diameter of a material by compressing its length.

  Upset forging
• When a metal is plastically deformed, impurities tend to reorient themselves in the direction of working, displaying ________.

  flow structure
• Which of the following types of press is often used for operations on curved or cylindrical workpieces?

  Horn press
• An elusive variable in process modeling is the ________ between the tool and the workpiece.

  friction
• Which of the following is an example of a dependent variable?

  Anisotropy
• ________ uses external hammering to reduce the diameter or produce tapers or points on round bars or tubes.

  Swaging
• ________ involve the deformation of a material where the thickness and surface area remain relatively constant.

  Sheet-forming
• ________ is used to shape hollow parts with a solid bottom.

  Backward extrusion
• What does the heat help with during the hot working metal process?

  Plastic flow
• The process determines the nature and values of ________.

  dependent variables
• ________ is the plastic deformation of metals about a linear axis with little or no change in the surface area.

  Bending
• ________ describes the ability of a material to be deformed.

  Formability
• ________ is the mechanical cutting of materials without the formation of chips or the use of burning or melting.

  Shearing
• Some forming processes are sufficiently complex that they may have ________ or more interacting independent variables.

  15
• Which of the following types of press is most useful for producing sheet metal parts with numerous holes or slots that vary in size and shape?

  Turret press
• In ________, the bending form remains stationary and the pressure tool moves along the surface of the workpiece.

  compression bending
• In terms of common rolling processes, a ________ is a rectangular solid where the width is greater than twice the thickness.

  slab
• ________ is defined as the plastic deformation of metals at a temperature above the recrystallization temperature but below the melting point.

  Hot working
• Which of the following is not a type of deformation process?

  Melting
• Which of the following processes would increase the accuracy of a part size while hot forming?

  Closed die forging
• Which of the following is an example of a dependent variable?

  Surface finish and precision
• For materials displaying this property, ________ is/are greatest when the material is at elevated temperature.

  speed sensitivity
• In the process known as ________, precise control of the inner diameter is sacrificed in exchange for process simplicity and the ability to draw long lengths of product.

  tube sinking
• The primary deformation stress in bulk forming processes is ________.

  compression
• Which of the following is not a basic component of a piercing and blanking machine?

  Mandrel
• Wire, rod, and tube ________ operations reduce the cross section of a material by pulling it through a die.

  drawing
• In the ________ process, metal is compressed and forced to flow through a shaped die to form a product with reduced but constant cross section.

  extrusion
• Which of the following is an example of an independent variable?

  Lubrication
• ________ is a cold-working phenomenon that causes metal to change shape by an amount predicated on the material yield curve post-deformation.

   

  Elastic springback
• When cold working, the strength levels induced by ________ are often comparable to those produced by the strengthening heat treatments.

  strain hardening
•  Almost all sheet metal forming is considered to be ________ processing.

  secondary
• Which of the following is not considered a component of sheet processing?

  Forging
• Which of the following operations produces a "slug" (punch out)?

  Piercing
• In this shearing operation, a large number of closely spaced holes is produced where a slug is removed from each hole.

   

  perforating
• Which of the following is not a way to gain information about independent-dependent relationships?

  None of the above