Metal fabricating and welding glossary - C

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Clearance

The space, per side, between the punch and die. This space is also called breakage on trim and/or pierce dies. It is also the space between any two details to avoid interference.

CNC punch press

Machine supplying compression force for reshaping materials and being controlled by a computer numerical control device.

Cold weld

Defective weld due to improper contact or inadequate heat during welding.

Cold worked

Material hardened naturally through forming at ambient temperatures.

Compound die

Tool used to pierce, form and blank a part at the same time, with one stroke of the press.

Continuous weld

Continuously welding one coil to another at the entry end and splitting off coils of a specific weight at delivery end.

Corrugated sheet curving

A metal fabricating process used to transform a flat sheet of corrugated steel into a curved sheet. This process is accomplished by placing a flat sheet of corrugated steel into a mechanical curving mandrel that consists of a series of interlocked steel rollers. The corrugated sheet is repeatedly fed into the rollers and then slowly bent in small increments until the desired radius bend in the corrugated sheet is achieved. The sheet is bent in small increments to prevent it from forming kinks and to control the degree of bend achieved.

Photo of corrugated sheet curving.

Cut

To separate any portion of a workpiece from any other portion of the same workpiece by a step of machining (e.g., grinding, drilling, boring, milling, planing), severing (e.g., breaking, sawing, slicing, shearing), or by intrusion of a sharp-edged or pointed tool without removal of material (e.g., stabbing, splitting, intrusive punching).

Cut edge

The normal edge that results from the shearing, slitting or trimming of a mill edge.

Cutting torch

A device used in gas cutting for controlling the gases used for preheating and the oxygen used for cutting the metal.

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