Pressure mold box for cold drawing of high-carbon steel wire

Abstract

The invention relates to a pressure mold box, in particular to a pressure mold box for cold drawing of high-carbon steel wire used for aluminum clad steel, comprising a box body of the mold box. The mold box is characterized in that: the box body is provided with a relief-pressure hole and a cooling water channel, a pressure mold box with an inverted-eight-shaped work area and a drawing mold, the pressure mold box is fixed by a front block, and the drawing mold is fixed by a rear block. The pressure mold box disclosed in the invention has the advantages of simple structure and easy operation. By utilizing a linear motion of the steel wire rod, drawing powder is brought into the mold box to form a certain pressure on the steel wire rod surface, so as to guarantee the lubricity required for the deformation of the steel wire rod. And the excess drawing powder overflows from the relief-pressure hole to ensure the pressure in the mold box not to be too high, so as to avoid the breaking of the steel wire rod.

Description

technical field [0001] The invention relates to a pressure die device, in particular to a pressure die device suitable for improving the adhesion of drawing powder during cold drawing of high-carbon steel wire for aluminum-clad steel. Background technique [0002] With the development of the national electric power industry, customers' demand for electrical aluminum-clad steel wire products with higher strength, better corrosion resistance, and better electrical performance than galvanized steel wire continues to increase. The initial quality of the steel wire is closely related. The quality of the initial quality of the steel wire can affect the overall product yield and have a great impact on the cost. Therefore, the quality of steel wire rod is very critical in the drawing process. How to control the drawing quality of steel wire rod and reduce the amount of waste in subsequent processes has also become a difficult point in the aluminum-clad steel manufacturing industry. ...

AI Technical Summary

Problems solved by technology

At present, the diameters of steel wire rods used in the production of aluminum-clad steel in China usually have Φ6.50mm and Φ5.50mm. The drawing of steel wire rods can be drawn to the required specifications by relying on five-die wire drawing machines at most. During the drawing process Rely on water to cool the wire drawing die and wire drawing drum, so that the working temperature of the equipment is kept below 60°C. There is a defect in the drawing process of this equipment, that is, the steel wire rod enters the first mold after peeling treatment. At this time, all the oxides on the surface of the steel wire rod have been removed, the surface is very smooth, and the wire drawing lubricant powder is not easy to adhere to it, resulting in poor lubrication effect when the steel wire rod enters the wire drawing die, and it is easy to cause the steel wire to be scratched and roughened. In severe cases, even The steel wire can be broken, and the steel wire that has been pulled or roughened will definitely cause quality problems in the subsequent process, which will increase the amount of waste products

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