Manufacturing Technology 1: Metal Forming Processes

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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?

Impact extrusion (B) Signup and view all the answers

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

Increased production rates (C) Signup and view all the answers

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

More complex shapes can be achieved (A) Signup and view all the answers

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 (A) Signup and view all the answers

What is the characteristic of bulk deformation processes?

They involve significant deformation and a small surface area-to-volume ratio (B) Signup and view all the answers

What is an example of a sheet metalworking process?

Bending (C) Signup and view all the answers

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

Stampings (D) Signup and view all the answers

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

Sheet metal working (C) Signup and view all the answers

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

Deformation processes (B) Signup and view all the answers

Deformation processes are characterized by which of the following?

Starting material is a ductile solid (A) Signup and view all the answers

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

To increase ductility and for other reasons (B) Signup and view all the answers

Which of the following is NOT a deformation process?

Soldering (D) Signup and view all the answers

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

The material must be sufficiently ductile (C) Signup and view all the answers

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

Forging operation (C) 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?

Deformation process (B) Signup and view all the answers

What is the primary purpose of tube drawing?

To reduce the diameter or wall thickness of seamless tubes (A) Signup and view all the answers

What is the limitation of tube drawing without a mandrel?

It lacks control over the inside diameter and wall thickness (D) Signup and view all the answers

What is the purpose of lubrication in hot extrusion?

To reduce friction and provide thermal insulation (B) Signup and view all the answers

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

To establish inside diameter and wall thickness during the operation (B) Signup and view all the answers

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

It removes the limitations on work length (C) Signup and view all the answers

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

Glass (C) Signup and view all the answers

What is the primary characteristic of the drawing process?

It is a cold working process (B) Signup and view all the answers

Which process is used to produce the initial tubing?

Extrusion (D) Signup and view all the answers

Why is tube drawing sometimes referred to as tube sinking?

Because it is used for diameter reduction (D) 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?

The strength of the material (B) Signup and view all the answers

What is the typical material used in wire drawing?

Steel, copper, aluminum and their alloys (C) Signup and view all the answers

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 (C) Signup and view all the answers