A metal product preprocessing combined wire drawing machine

Abstract

The invention relates to the technical field of combined wire drawing machines, and discloses a pre-processing combined wire drawing machine for a metal product. The combined wire drawing machine comprises a fixed die, a conical hole and a steel wire, the diameter of the opening of the right end of the conical hole is greater than that of steel wire, and an extrusion ring is fixedly arranged in the interior of the conical hole; a heat dissipation channel is formed in the position, located above the conical hole, of the interior of the fixed die, and a heat conduction pipe is fixedly arranged on the left side face of the fixed die and located on the outer side of the outlet of the heat dissipation channel; the left side face of the fixed die and the outer side of the outlet of the conical hole are fixedly provided with a heat preservation device. According to the pre-processing combined wire drawing machine for the metal product, when wire drawing is carried out on the wire drawing machine, the extrusion ring replaces the conical hole to extrude the steel wire, and the friction between the surface and the surface is converted into the friction between the surface and the wire, so that the friction heat is reduced, and the friction heat can be dissipated in time through the heat dissipation channel formed in the interior of the fixed die, so that the smoothness of the wire drawing process is ensured.

Description

technical field [0001] The invention relates to the technical field of combined wire drawing machines, in particular to a combined wire drawing machine for preprocessing metal products. Background technique [0002] Automatic wire drawing machine is a kind of mechanical equipment for cold drawing of metal wire or bar, so that the diameter, roundness, surface finish and other parameters of the raw material meet the production requirements. [0003] The wire drawing structure of the existing coupled wire drawing machine is divided into two types: fixed die and roller die. The structure of the fixed die is as follows: figure 1 As shown, by passing the steel wire through one end of the tapered hole opened on the stent, and pulling the steel wire out from the small end, the effects of reducing the cross-sectional area of ​​the steel wire and smoothing the surface can be achieved. Because the structure relies on the hard extrusion between the steel wire and the fixed die, a large...

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Problems solved by technology

[0003] The wire drawing structure of the existing coupled wire drawing machine is divided into two types: fixed die and roller die. The structure of the fixed die is as follows: figure 1 As shown, by passing the steel wire through one end of the tapered hole opened on the stent, and pulling the steel wire out from the small end, the effects of reducing the cross-sectional area of ​​the steel wire and smoothing the surface can be achieved. Because the structure relies on the hard extrusion between the steel wire and the fixed die, a large amount of heat will be generated due to sliding friction between the steel wire and the inlet of the tapered hole, resulting in adhesion between the steel wire and the fixed die. In order to ensure the next pass The smooth drawing of the steel wire must wait for the steel wire to be fully cooled, that is, to slow down the speed of the wire, which will further aggravate the adhesion between the steel wire and the fixed die, and reduce the quality of the steel wire drawing. Rapid cooling causes strong work hardening on the surface of the steel wire, dislocation of the internal lattice structure, a large difference between the surface hardness of the steel wire and the central hardness, and the wire is easy to break

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