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The Book of Terms

The Book of TermsThe WJI Book of Wire & Cable Terms: an interactive experience of learning and sharing
This book, written by industry volunteers and containing more than 5,000 entries, is an asset for newcomers to wire and cable.

At the same time, it also represents an opportunity for industry veterans to give back by either updating or adding to the more than 5,000 entries. This is an honor system process. Entries/updates must be non-commercial, and any deemed not to be so will be removed. Share your expertise as part of this legacy project to help those who will follow. Purchase a printed copy here.

   

 

All   0-9   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Cogging

The initial stages of a hot rolling process in which the chief object is to reduce the cross-section as expeditiously as possible.

Coherent Source

A light source that emits a very narrow, unidirectional beam of light of one wavelength (monochromatic).

Coil

1) Term used to indicate the finished configuration of a rolling mill. This could be sheet metal or wire rod. 2) Wire wound on a spool or mandrel for in-process needs or for finished product from various operations.

Coil Effect

The inductive effect exhibited by a spiral-wrapped shield, especially above audio frequencies.

Coil Taping Machine

A machine used for binding the tape on electrical field and similar coils, for insulation purposes.

Coil Winding Machines, Bobbin Type

A bobbin winder distributes wire uniformly on a coil winding form bobbin. Bobbin coils are used in door chimes, relays, solenoids, transformers, etc.

Coil Winding Machines, Stick Type

This equipment essentially consists of rotating arbor on which a long tube is mounted. The tube, which does not have flanges at this point, serves as the coil form on which the magnet wire is wound. Various tensioning devices and feeding mechanisms are required to feed the wire from spools and distribute it to the winding tube. A number of coils are wound at one time on a single spool with tape for holding purposes and insulation applied as necessary. After the winding is completed, the tube is cut apart into individual coils.

Coil Winding Machines, Toroidal Type

This equipment has coils or transformers that are wound on a ring-shaped or doughnut-shaped cores. Such a core provides a maximum magnetic field within itself and minimum magnetic flux leakage externally.

Coil Wrapping Machines

Designed to wrap coils and straight bundles of wire or cable entirely mechanically, using paper, hessian, cellulose film, etc. The machine is loaded with a roll of wrapping material that is taken automatically through the “eye” of the coil and around the wire so that the coil is evenly and tightly wrapped in a matter of seconds. These machines are also capable of gluing the paper so that the wrapping does not unravel.

Coil, Electric

Successive turns of insulated wire which create a magnetic field when an electric current is passed through them. It may also consist of a number of separate insulated sections that lie side by side around the same magnetic circuit.

Coiler

A type of machine used to package wire. A coiler usually refers to a machine (deadblock) that packages wire onto tubular carriers, as opposed to “spoolers,” which wind the wire onto spools, or “live blocks,” which are a turning block that accumulates the wire on a frame mounted to a capstan.

Coiling Units

Stationary coiling machines which can be coupled to a wiredrawing machine or used as a take-up for such processes as galvanizing, patenting, extruding, etc., enabling high-speed production to continue during the coil removal period. See Gravity Block and Rotolay.

Cold Bend Test

A test whereby a sample of wire or cable is wound around a mandrel of a specified size, at a specified temperature for a given number of turns at a given rate of speed. The sample is then removed and examined for deterioration in materials and construction.

Cold Blade Stripper

Device for removing insulation using a cold knife blade.

Cold Cracking

Development of flaws due to low temperature exposure.

Cold Drawing

The process of reducing the diameter of hot-rolled rod by means of pulling through a sizing die. This changes the tensile strength of the material being processed while also altering the dimension.

Cold Flow

Permanent deformation of material/insulation due to mechanical force of pressure (not due to heat softening).

Cold Forging

A method of forming shaped steel products from cut lengths of bar or from pre-pressed blanks by applying a sequence of operations such as heading, upsetting, pre-forming, forward or backward extrusion, pressing to shape, drawing, piercing and other operations, with intermediate annealing and surface treatment as necessary. See Cold Heading.

Cold Galvanizing

A designation for applying zinc-rich primers to provide galvanic protection. Another method, mechanical galvanizing with zinc powder, has gained wide acceptance as an alternative to hot dip galvanizing and zinc plating of fasteners and other small components. Compared to plating of high strength fasteners, the risk for hydrogen embrittlement is very much reduced.

Cold Heading

A manufacturing process that forces metal to flow, upon impact, into dies to form different shapes and sections. The term broadly covers both upsetting (the expansion of the body of the part) and heading (the forming of the end of the section). Although mostly used for the production of bolts, screws and rivets, the process is applicable to a wide variety of special parts. Wire or bar stock is generally used in heading operations. While the process is referred to as “cold,” a considerable amount of heat can be generated.
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