COLD WORKING PROCESSES Flashcards
process of metal forming in which the deformation of metal occurs below its recrystallization temperature. In most cases, we perform cold working of metal at room temperature.
Cold Working Processes
Metal is pulled through a die to reduce diameter, increase length, or modify shape.
Cold Drawing
method of shaping metal by
applying compressive forces without the use of heat, typically below the material’ s recrystallization temperature.
Squeezing
Compresses and reduces metal
thickness.
Cold Rolling
Applications: Uniform profiles in mass
production.
Cold Rolling
Shapes metal using compressive
forces from manual hammer or machine hammer
Cold Forging
Applications: Manufacturing fasteners
with enhanced mechanical properties.
Cold Forging
Forces metal through a die to produce
long, uniform shapes.
Cold Extrusion
Applications: Automotive parts and
industrial profiles.
Cold Extrusion
Deforms metals into angular shapes at
room temperature.
Cold Bending
Methods:
1. Rotary Draw Bending
2. Ram Bending
3. Roll Bending
Cold Bending
Methods:
1. Rotary Draw Bending: Bends pipes
using a rotating die.
2. Ram Bending: Uses hydraulic force for pipe bending.
3. Roll Bending: Adjusts bend radius
using three forming rolls.
Cold Bending
Produces precise designs on metal
surfaces via high-pressure stamping.
Coining
Cuts sheets using a shearing machine to ensure straightness and parallelism.
Shearing
Forms flat sheets into hollow shapes
(e.g., cups, cylinders).
Deep Drawing
Creates raised or recessed designs on
sheets.
Embossing
Type of Bending:
applying force to a sheet of metal over a die, it bends and molds the material into desired shapes.
Press Braking
Types of Bending:
One of the oldest and simplest tube bending methods, it uses a hydraulically driven ram that forces a tube against rollers or pivot blocks.
Ram Bending
Types of Bending:
a flexible rod or sleeve— is inserted into the pipe during the bending process to support the inner surface and maintain the pipe’s internal diameter. This prevents the pipe from collapsing or deforming, ensuring optimal flow characteristics and structural integrity.
Mandrel Bending
Type of Bending:
involves bending tubular sections of metal to create various shapes and angles. that uses a combination of dies and other various components working in a rotary action to bend the pipe.
Tube Bending
Types: Guillotine (oldest), Angle, Water Jet, Computer Numerical Control (CNC)
Shearing
The _____________ blades are usually high-strength steel alloys or tungsten carbide.
Shearing
