Drawing die applied to high-strength superfine steel wires

Abstract

The invention discloses a drawing die applied to high-strength superfine steel wires. The drawing die comprises a die body, wherein a drawing through hole is formed in the die body and is funnel-shaped; a hole-shaped structure of the drawing through hole is successively divided into an inlet area, a deforming and sizing area and an outlet area from top to bottom; the rounding radiuses R of a transition part between the inlet area and the deforming and sizing area and a transition part between the deforming and sizing area and the outlet area are 2-5mm; the inlet area is inverted cone-shaped; the cone angle of the inlet area is alpha 1; the outlet area is normal cone-shaped; the cone angle of the outlet area is alpha 3; the upper part of the deforming and sizing area is inverted cone-shaped; the lower part of the deforming and sizing area is normal cone-shaped; cone angles of the upper part and the lower part are equal in size and are alpha 2; alpha 3 is greater than alpha 2 and is lessthan alpha 1; the height ratio of the three subareas is 1 to 1 to 1. The drawing die applied to high-strength superfine steel wires has the beneficial effects that the transition parts between the areas are free of corner angles; the liquid-carrying resistance is reduced; the lubrication liquid can smoothly flow; the abrasion to the die is reduced; the areas are reduced; the stability of the drawing operation is improved; the process residues can be conveniently discharged.

Description

technical field [0001] The invention relates to the technical field of steel wire drawing dies, in particular to a drawing die suitable for high-strength ultra-fine steel wires. Background technique [0002] Many things in the industry are cut with cutting wires, such as polysilicon slices in the photovoltaic field. With the rapid development of solar photovoltaics, the application of diamond cutting wires in polycrystalline and single crystal silicon wafer slicing technology is becoming more and more refined, high-strength and ultra-fine The demand for steel wire diamond busbars is growing in a blowout. As the name suggests, diamond cutting wire is related to diamond. Generally, tiny particles of diamond are embedded on the wire to make a diamond cutting wire. The diamond wire has diamond micro-sawtooth, which increases the cutting ability of the steel wire and can greatly speed up the cutting speed. [0003] Diamond wire cutting technology also has higher requirements f...

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Problems solved by technology

Compared with the existing commonly used technology, the above scheme has indeed improved to a certain extent, but there are still some defects: there are edges and corners between the various partitions, which will hinder the circulation of the lubricating fluid, and will form a backflow vortex, so that the previous partitions are lubricated. Too much liquid and insufficient lubricating liquid in the rear partition, even the lubricating film cannot be formed in the lubricating area, resulting in excessive dry wear of the steel wire and the mold paper, so that the steel wire does not receive the drawing of the standard process, and the mold will also wear too much Fast; there are 6 partitions in the mold, and the distribution length of each partition is too small, which will cause insufficient contact area of ​​the steel wire in the deformation zone of the mold, unable to deform uniformly, and prone to broken wires, and such settings have too many edges and corners, which increases the Ineffective wear between the mold and the steel wire, and too many partitions to make the diameter of the steel wire extrusion deformation smaller will lead to a corresponding reduction in the aperture of the mold, and it is easy to make the processing residue stay inside the mold; the working area includes a sizing area , the contact surface between the sizing area and the steel wire is a line contact surface, which not only increases the drawing resistance, is not conducive to the lubricating fluid and heat dissipation of the steel wire, but also requires higher precision and adjustment skills of the equipment, especially for high strength and low The diameter of the steel wire increases the difficulty of operation, so it takes a lot of time to start the debugging of the whole machine, and the efficiency is low

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