30 Questions
What is the primary advantage of cold extrusion over hot extrusion in terms of material properties?
Increased strength due to strain hardening
Which of the following metals is most ideal for extrusion, both hot and cold?
Aluminum
What is the primary purpose of heating the billet in hot extrusion?
To increase the ductility of the metal
What is the term used to describe high-speed cold extrusion?
Impact extrusion
What is the primary advantage of cold extrusion in terms of production?
Increased production rates
What is the primary advantage of hot extrusion in terms of shape complexity?
More complex shapes can be achieved
What is the primary purpose of metal forming in manufacturing processes?
To change the shape of metal work pieces into a suitable form for manufacturing
What is the characteristic of bulk deformation processes?
They involve significant deformation and a small surface area-to-volume ratio
What is an example of a sheet metalworking process?
Bending
What is the term used to describe metal parts made on a stamping press?
Stampings
What is the classification of metal forming processes that involves bending, forming, and shearing operations?
Sheet metal working
What is the category of deformation processes that includes forging, extrusion, and rolling?
Deformation processes
Deformation processes are characterized by which of the following?
Starting material is a ductile solid
What is the primary purpose of heating the work material before forming?
To increase ductility and for other reasons
Which of the following is NOT a deformation process?
Soldering
What is the primary requirement for a material to be shaped through deformation processes?
The material must be sufficiently ductile
Which of the following deformation processes involves shaping a part using a drop hammer?
Forging operation
What is the term for the process of shaping a metal part by applying forces that exceed its yield strength?
Deformation process
What is the primary purpose of tube drawing?
To reduce the diameter or wall thickness of seamless tubes
What is the limitation of tube drawing without a mandrel?
It lacks control over the inside diameter and wall thickness
What is the purpose of lubrication in hot extrusion?
To reduce friction and provide thermal insulation
What is the purpose of a fixed mandrel in tube drawing?
To establish inside diameter and wall thickness during the operation
What is the advantage of using a floating plug in tube drawing?
It removes the limitations on work length
What is the primary material used as a lubricant in hot extrusion?
Glass
What is the primary characteristic of the drawing process?
It is a cold working process
Which process is used to produce the initial tubing?
Extrusion
Why is tube drawing sometimes referred to as tube sinking?
Because it is used for diameter reduction
What determines the force that can be applied in pulling the wire through the die in continuous wire drawing?
The strength of the material
What is the typical material used in wire drawing?
Steel, copper, aluminum and their alloys
What is the purpose of using a series of progressively smaller dies in continuous wire drawing?
To reduce the size of the wire to the final-size section
Test your knowledge of metal forming processes, including rolling, forging, drawing, and extrusion. Identify bulk deformation processes, hot working, and cold working of metals, and understand the principles and types of each process.
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