Frictionless drawing of High-Carbon wire

PUBLISHED: 06 Mar 07

Wire lubrication by PDH system
Wire lubrication by PDH system

The new PDH lubrication system is used in the most demanding drawing applications, allowing the highest drawing speeds, with all carbon steel rods/wires, mechanically descaled or acid cleaned, bare or pre-coated, bright or galvanized, and in production of high quality wires, including spring, rope, bead, PC strand, stainless steel spring and alloys, galvanised H/C wire, AL-clad wire, plating wire, reflective bright wire, CO2 welding wire, colleted nail wire, etc.

The PDH lubrication system benefits from the most unique fully controlled 3-way interaction between the pressure, temperature and lubricant viscosity, completely eliminating traditional wet pre-coatings for all drawing applications form rod to wire, including mechanically descaled 0.90 %C rod drawn without pre-coating chemicals.

The system permits �frictionless� drawing with the full lubricant film at wire-die interface ( physical separation of metal-to-metal contact ), automatically controlled, thanks to the innovative PDH rod/wire dry coating/lubrication technology enabling automatically controlled fusion of the lubrication compound. Such a liquefied substance, with controlled viscosity, performs an exceptionally consistent and hard residual coat, adjustable in weight at all speeds, eliminating the need for phosphate and borax pre-coating chemicals and their substitutes.

This new wire coating / lubrication system allows a wide range of residual coats, strongly adherent for high-tensile wire, and light water soluble coat for plating wire.

One of the typical applications of the PDH system consists in drawing from 5.5 mm ( .218" ) diameter, 0.83 / 0.88 % C, mechanically descalerd rod, directly, without pre-coating, with an output of 2.2 tonne/hour, and with a die life of 200 tonnes/die in the 1st draft and a die wear of 0.30 micron / tonne of wire drawn in the last draft.

In other multi-draft H/C applications, the finishing die produces 40 to 60 tonnes of wire drawn without pre-coating chemicals, with wire properties (ductility, cast and torsion test) improved and exceptionally consistent.

The PDH lubrication system features 'zero' energy consumption, self generating processing heat and pressure. It is easy to install on any wire drawing machine and it can be operational within 2 - 3 hours.

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

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