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2. Metal spinning - Wikipedia

   en.wikipedia.org/wiki/Metal_spinning

   With this advancement, metal spinning craftsmen were now able to spin higher quality pieces made out of brass, copper, aluminum and even stainless and cold-rolled steel. Metal spinning does not involve removal of material, as in conventional wood or metal turning, but forming (moulding) of sheet metal over an existing shape.

3. Tube bending - Wikipedia

   en.wikipedia.org/wiki/Tube_bending

   Ball mandrel without cable: unlinked steel ball bearings inserted into tube, used on critical and precise bends; Ball mandrel with cable: linked ball bearings inserted into tube, used on critical bend and precise bends; Sand: sand packed into tube; In production of a product where the bend is not critical a plug mandrel can be used. A form type ...

4. Mandrel - Wikipedia

   en.wikipedia.org/wiki/Mandrel

   A mandrel, mandril, or arbor is a tapered tool against which material can be forged, pressed, stretched or shaped (e.g., a ring mandrel - also called a triblet [1] - used by jewellers to increase the diameter of a wedding ring), or a flanged or tapered or threaded bar that grips a workpiece to be machined in a lathe.

5. Lugged steel frame construction - Wikipedia

   en.wikipedia.org/wiki/Lugged_steel_frame...

   A stainless steel investment cast seat lug, with hand filed cutout, which has been polished to a mirror finish. These lugs necessitate construction with silver rather than brass filler. Traditional stamped lugs (aka pressed lugs) are formed by pressing sheet steel over a mandrel, bending them to shape, and then welding the seams.

6. Metal fabrication - Wikipedia

   en.wikipedia.org/wiki/Metal_fabrication

   A set of six-axis welding robots.. Metal fabrication is the creation of metal structures by cutting, bending and assembling processes. It is a value-added [1] process involving the creation of machines, parts, and structures from various raw materials.

7. Bending (metalworking) - Wikipedia

   en.wikipedia.org/wiki/Bending_(metalworking)

   Bending A chimney starter, a sample product of bending. Bending is a manufacturing process that produces a V-shape, U-shape, or channel shape along a straight axis in ductile materials, most commonly sheet metal. [1] Commonly used equipment include box and pan brakes, brake presses, and other specialized machine presses.