wire straighteners, feeders, guides and accessories

WITELS ALBERT USA
Oxford, MD 21654 USA
Phone: 410.228.8383
Fax: 410-228-1813

Exclusive stocking office for North, South and Central America

Factors affecting THE STRAIGHTENING PROCESS

WHAT IS STRAIGHTENING?

Straightening is the apparent elimination and removal of stresses induced into the material to be straightened during its manufacture due to force and torque related influences. This applies to wire straightening, tube straightening, cable straightening, strip and flatwire straightening and profile shape straightening.

AN ANALYSIS OF THE MANUFACTURING PROCESS RELATING TO THE MATERIAL TO BE STRAIGHTENED:

The smaller the force and torque related influences, the easier the straightening process.

  1. Avoidable stresses:
    • Overhead take-offroll1
    • Static spooling
    • Improper product guidance
    • Frequent changes in direction
    • Poorly located straightening processes
    • The wrong tools
  1. Unavoidable stresses:
    • Drawing
    • Spooling and coiling
    • Directional changes and guidance
  1. Corrective measures applicable to unavoidable stresses:
    • Verified straightening
    • Controlled directional changes
    • Maintenance of constant curvature
    • Uniformly consistent bending direction

IT FOLLOWS THAT ATTENTION SHOULD BE GIVEN TO:

  1. Staying on the centerline (i.e., avoiding deflection in the material path and directional changes). Maintain a straight path through drawing with axial and radial spool movement.
  2. Maintenance of bend direction and curvature when spooling and guiding (seefigure 2) i.e., do not bend the material to be straightened “back over” (see figure 1).
  3. Maintenance of constant initial curvature and constant torsion or helix i.e. by choosing a suitable straightener such as a helix straightener or killing-pulley set (see figure 3-5)

THE ANALYSIS OF THE MATERIAL TO BE STRAIGHTENED roll2

A correct analysis of the material is a prerequisite if a verified straightening process is to be constructed. ISO 6931 provides information regarding the long neglected torsion test.

  1. Check the range of initial curvature (see figures 3 and 4) taking into account different spool diameters (min./max.)
  2. Check
    1. the torsion (helix)
    2. radial displacement (figure 5)
    3. axial displacement (figure 6)
Choosing the Right Straightener

Positioning the Straightener

Maintenance of the Straighteners and Rolls

 

Witels Albert supplies a variety of straightener accessories for ease of set-up and “repeatability” of settings. For example: quick opening/closing options, roller position indicators, locking levers, entry/exit guide pulleys, guide dies, micrometer adjustment, guards, and Witels Albert proprietary software packages that allow for automatic or semi-automatic positioning of rollers and other components.

In addition, our wide range of range of raw material handling products includes wire straighteners, tube straighteners, wire guides, tube guides, tube feeders and wire feeders or drive units, cable straighteners, strip straighteners, flatwire straighteners, custom built feeding machines, straightening rolls , preformers or preform heads , sleeve rolls for high speed and high temperature applications, computerized wire straightener and tube straightener adjustment systems, and Witels Albert proprietary software packages that allow for automatic or semi-automatic positioning of rollers and other components.

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WITELS ALBERT USA - 208 E. Pier St. - Oxford, MD 21654 - Phone 1-410-228-8383 - Fax 1-410-228-1813 - info@witels-albert-usa.com