Hollow conductor and manufacturing method thereof

Abstract

The invention provides a novel hollow conductor and a manufacturing method thereof. The novel hollow conductor comprises a conductor main body (1), wherein the middle part of the conductor main body (1) is provided with an inner hole of which the cross section is waist-shaped; the outer ring of the cross section of the conductor main body (1) is rectangular; the thickness of the short edge of thecross section of the conductor main body (1) is greater than that of the long edge; the manufacturing method of the novel hollow conductor sequentially comprises a copper ingot smelting step, an extruding step and a chain drawing step, wherein an extruding mold used in the extruding process comprises an outer die (2) and a piercing needle inner die (3); the cross section of the piercing needle inner die (3) is circular; and both sides of the cross section of the inner hole of the outer die (2) are respectively provided with an ear groove (2.1). The hollow conductor and the method have the advantages that the manufacturing process is simple, the requirement to apparatus is low, and the cost is low.

Description

technical field [0001] The invention relates to the field of pipe materials, in particular to a hollow wire, in particular to a novel hollow wire and a manufacturing method thereof. Background technique [0002] Due to the skin effect when the current is conducted in the wire, in order to reduce the cost of the wire, the wires used in some large generators and other fields are currently trying to use hollow wires. The current hollow conductors generally have square holes. During processing, the copper material is usually extruded into a copper bar with a rectangular groove, and then the two copper bars are riveted into a rectangular hollow tube through a cold drawing process. The hollow tube produced by this process is a seamed product, and the riveting part may break during use, and the performance is unstable. [0003] At present, it is also proposed to directly adopt the process of extrusion and cold drawing to make seamless hollow wires, but in the previous production p...

AI Technical Summary

Problems solved by technology

As shown in Figure 1, if relative rotation occurs, The shape of the product will be deformed, which will greatly affect the quality of the product

But because the perforating needle inner die of the prior art is usually connected on the extrusion shaft in the form of threaded connection, this has just caused the shape of the perforating needle working part and the relative position of the tail thread to be difficult to fix, and the second perforating needle is connected on the extrusion shaft The relative position on the finale is not easy to fix

Therefore, in order to ensure the relative position of the extrusion die and the perforating needle, the requirements for the equipment are relatively high, and the cost of the equipment is also high.

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