September 13th, 2017

Wire Strands: A Conceptual Overview

In this post, we will look at wire strands on a conceptual level. We will see how they are manufactured. We will also learn about how wire strands are used in a variety of applications.

What are wire strands?

Wire strands start out as steel. High carbon steel to be precise. High-quality steel is fashioned and pulled into steel wires. These wires are then wound into a strand. Each strand may contain up to seven individual wire components.

How is wire stranding done?

The stranding process is carried out keeping one or more wire components at the core. Each wire is spooled onto a bobbin and loaded onto a stranding machine. The strander is a gigantic winder, up to 64 wires can be stranded on these strander machines. Typically 19 to 36 wires are commonly found in wire strands. The strander machine twists the wires and forms them in a die. Simultaneously petrochemical lubrication is added. The type of lubrication and its application depends on the utility of the wire strand.

The wire strand is then subject to a set of straightening rollers which eliminate the remainder of restorative forces present in the steel wires prior to spooling on a bobbin. This straightening prevents the strand from flaring.

Construction of Wire strands:

Wire strands are constructed with peripheral wire elements helically twisted around a single or set number of wires.

Lay of the wire strand:

The orientation of the twist of the wires in a strand about its helical axis is known as the lay of the wire. Distance traveled along one complete helical turn about the helical axis is also known as the Lay distance. Typically a wire strand may have a right handed orientation or a left handed orientation.

Construction of Wire strands:

Wire strands are constructed in many patterns some commonly found patterns are described below.

  • Round Strand- Wires in the strand form a circular shape
  • Centerless Strand- Wires are arranged helically without a central core
  • Single Layer Strand- Outer wires are wound around a central wire
  • Multilayer Strans- Multiple layers of wire are layered around a central wire
  • Seale Strand
  • Filler wire strand
  • Warrington
  • Combination strand
  • Warrington Seale
  • Flattened strand
  • Compacted strand
  • swaged strand

In this post, we have outlined a few types of constructions of wire strand. Hold on to your seats until the next post. Until next time folks.


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