Reading Assignment
- 16.2 Classification of Deformation Processes
- 16.3 Bulk Deformation Processes
- 16.4 Rolling
- 16.5 Forging
- 16.6 Extrusion
- 16.7 Wire, Tube and Rod Drawing
- 16.8 Cold Forming, Cold Forging and IMpact Extrusion
- 16.9 Piercing
- 16.10 Other Squeezing Processes
Recommended Reading
youtube.com/watch?v=vHkwq_2yY9E
Outline
Bulk Forming Processes
Rolling (video)
Cold Rolling (video)
Introduction
Hot rolling is a process by which metal is forced between forming rolls to produce a desired profile. It is used to create rail shapes, structural steel shapes and plates. Hot rolling often follows a continuous casting operation.
At the heart of the process is the rolling mill. Some common types of rolling mills include:
Mill Types
- Reversible Mill
- 2 High stand www.deform.com/applications/Multi-Pass%20Rolling
- 3 High stand
- 4 High stand (uses backer rolls to prevent deflection)
- Pullover Mill
- Universal Mill – horizontal and vertical combination mill
- (video)
Typical Hot Rolling Mill Features
Forging
Description
Forging can be a cold or hot work process.
It involves plastically deforming a workpiece by either hammering or pressing (the distinction between these two is the rate at which the energy is applied). An advantage of forging is the highly dense metal structure, and the directional grain alignment that results from the flow of metal under extreme pressure.
Forging Types
- Open Die Forging
- Impression Die Forging (animation)
- Seamless Ring Rolling Animation
(video) - Isothermal Forming
- Orbital Forging
- Upsetting
- Wedge Rolling Animation
- (video)
See also:
SME Video and Study Guides for Forging
Extrusion
Aluminum Extrusion Plant (video)
See www.youtube.com/watch?v=zMhVPId-pRA (Impact extrusion video)
Direct Extrusion
Indirect Extrusion
Impact Extrusion
(video)
See also scuba tank video (start at 1:07)
Wire, Rod, and Tube Drawing
Cold Forming
Piercing
Other Processes
Additional Information
Aluminum Extruders Council – Extrusion Process
