SU127675A1 - Device for the continuous annealing of steel wire by electric current - Google Patents

Description

Devices for heat treatment of metal products by heating with an electric current passed through the workpiece are known.

A feature of the proposed device for the continuous annealing of steel wire by electric current supplied at a site limited by the tube length when the wire is passed through a multi-tube furnace is the use of sliding pressure contacts when the wire enters the tube and when it leaves the tube, and the steel wire is heated by electric current low voltage passed through the wire.

FIG. 1, 2 and 3 schematically depict a device in three projections; in fig. 4 is the same electric circuit for switching on the furnace.

The annealed steel wire is passed between the sliding pressure roller 2, which is individual for each wire, and the continuous lower contact bar 5. It passes through the tube 4 of refractory material and further between the contact roller 5 and the continuous lower contact strip 3.

The wire (all time) is continuously extended between the contacts and is heated to the required temperature during the passage from one contact to the other. The pipes 4 are assembled into a frame 5 and insulated. An insulation plate 7 is laid under the contacts.

To reduce the voltage to 65, a step-down transformer 8 is installed.

Wire-unwinding drums should be isolated from the furnace body.

Subject invention

A device for the continuous annealing of steel wire by electric current supplied at a site limited by the length of the pipe, by passing the wire through a multi-tube furnace, characterized in that the heating of the wire by low-voltage electric current is carried out using sliding pressure contacts located at the wire entrance to the pipe and at the exit of her pipe.

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