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Manupedia

Grid List Results: 20 items
Copyrighted  image Icon Copyright: The Open University
Conform Process article icon

Science, Maths & Technology 

Conform Process

Material is fed, via a groove in the circumference of an extrusion wheel, into a fixed abutment and then into an extrusion die. Initially, the material is dragged and pushed through the system purely by frictional forces occurring between the wheel and the material. Once the material reaches the die, pressure forces the material to continuously extrude sections for products such as wire, tubes or strips.

Article
Copyrighted  image Icon Copyright: The Open University
Vacuum Forming (Thermoforming) article icon

Science, Maths & Technology 

Vacuum Forming (Thermoforming)

A sheet of plastic, softened by heat, becomes pliable and when placed under vacuum adopts the shape of male or female mould.

Article
Copyrighted  image Icon Copyright: The Open University
Metal Spinning / Flow Turning article icon

Science, Maths & Technology 

Metal Spinning / Flow Turning

Spinning is a process used to produce an axis-symmetric hollow shape by the application of lateral pressure from a forming tool, to a rapidly revolving circular blank of sheet material, causing it to assume the shape of a former that is rotating with it.

Article
Copyrighted  image Icon Copyright: The Open University
Fluid and Rubber Die Forming (Guerin and Hydroform) article icon

Science, Maths & Technology 

Fluid and Rubber Die Forming (Guerin and Hydroform)

Sheet metal is placed between a solid die and a rubber pad. Under pressure from a rigid tool, the rubber behaves like a liquid and forms over the shape of the die, forcing the sheet metal to also adopt the die shape.

Article
Copyrighted  image Icon Copyright: The Open University
Deep Drawing article icon

Science, Maths & Technology 

Deep Drawing

A sheet blank, subjected to a peripheral hold-down pressure, is forced by a punch into and through a die to form a deep recessed part, having a wall thickness substantially the same as that of the blank.

Article
Copyrighted  image Icon Copyright: The Open University
Stretch forming article icon

Science, Maths & Technology 

Stretch forming

Contoured, curved shapes are formed from sheet metal pressed, stretched and bent over a die. Typical applications include curved panels such as car door panels or wing panels on aircraft.

Article
Copyrighted  image Icon Copyright: The Open University
Warm forging article icon

Science, Maths & Technology 

Warm forging

The workpiece billet is heated to temperatures between 0.25 and 0.6 Tm. A close fitting punch is used to exert pressure on the malleable metal billet held in a heated, closed die until forged to the required shape.

Article
Copyrighted  image Icon Copyright: The Open University
Cold forging article icon

Science, Maths & Technology 

Cold forging

A forging process carried out at temperatures below 0.25Tm. A closely fitting punch is used to exert pressure on malleable metal held in the die.

Article
Copyrighted  image Icon Copyright: The Open University
Axiforge process article icon

Science, Maths & Technology 

Axiforge process

Axiforge process can be carried out on dies, positioned on vertical or horizontal axes, within a press. Sideways ram movements apply pressure to the outside of a split die, so that the two parts close around a heated billet, forming it into the required external shape. This is followed by pressure from one or two piercing punch(es), which pierce the component to create its central bore(s).

Article
Copyrighted  image Icon Copyright: The Open University
Orbital forging article icon

Science, Maths & Technology 

Orbital forging

Workpiece material is forged between two dies. The bottom die moves upwards whilst the top die, tilted to a preset angle, rotates (orbits) around the central axis, progressively forming the malleable material into the required shape.

Article
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Rotary Forging, General Forging Machine (GFM) and Swaging article icon

Science, Maths & Technology 

Rotary Forging, General Forging Machine (GFM) and Swaging

A circular housing contains a rotating shaft (rotor) holding free moving anvils. At the end of each anvil is a die. The dies surround a centrally placed workpiece. Revolving around the rotor is a cage holding loosely rotating rollers. As the cage rotates, the rollers impact on the anvils, which effectively hammer the stationary workpiece into the required form. GFM is used to reduce the diameter of rods, tubes or pipes.

Article
Copyrighted  image Icon Copyright: The Open University
Isothermal precision forging article icon

Science, Maths & Technology 

Isothermal precision forging

The workpiece is formed to shape at a slow rate and at a temperature almost equal to that of the heated die. The long forging time, alongside forces exerted by the die, help to form an almost ‘ready to use’ component needing minimal supplementary machining.

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