Rod dry preparation and direct drawing

PUBLISHED: 05 May 11

Rod cleaning and wire drawing by DCCD process
Rod cleaning and wire drawing by DCCD process

The DCCD (Dry Cleaning, Coating and Drawing) process offers substantial cost savings in the most demanding drawing applications from mechanically descaled bare rod, drawn directly without wet pre-coating chemicals, including spring wire, PC strand wire, cold heading wire, plating wire, etc.

The process operates at 'zero' maintenance cost as there is no acid, no hot liquid tanks for rod pre-coating, no hot air blowers to dry wet rod, and it operates at virtually zero energy consumption.

An added benefit is the automatic control of lubrication parameters, including lubricant pressure, temperature and viscosity, enabling the use of standard high melting lubricants (+220°C/428°F) which are converted from solid into liquefied state and deposited on bare rod in a few microseconds, generating exceptional thermal stability at the highest drawing speed, eliminating phosphate, borax and their wet substitutes.

In operation, all these parameters 'communicate' together in a sensitive and automatic multi-way interaction to form a hard and strongly adherent full-film anti-wear lubricant coat, weight-adjustable, enabling frictionless drawing by physical separation of wire-die contact in all drafts, eliminating friction heat.

Typical applications of the DCCD process are: output of 2.2 tonne/ hour with 5.5mm 0.83/0.88%C rod, in a 'frictionless' drawing application with die life of 200 tonnes/die in the first draft and a die wear of 0.1 to 0.3 micron/tonne of wire drawn in the last draft.

Spring wire is drawn from mechanically descaled bare rod, without pre-coating chemicals, at 18m/s (3,600ft/min); 5.5mm 0.72%C rod drawn to 2.35mm at 16m/s (3,200ft/min); 10.5mm 0.85/0.88%C rod drawn to 4.22mm at 9m/s (1,800ft/min).

Decalub, France
Tel: + 33 1 64 26 20 66

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