Method for preparing soft aluminum conductor and molding device

Abstract

The invention relates to the improvement of a method for preparing a soft aluminum conductor for an electrician and a molding device. The method is characterized by comprising the following steps of: delivering and filling an aluminum rod in a seal friction smelting space by continuous feeding and carrying out continuous friction on the space filled aluminum so that the aluminum is heated above the recrystallization temperature to a semi-smelting state; and continuously extruding under continuous feed and extrusion through a molding die in a tail end area of the smelting space. The molding device comprises a rotary friction rotating wheel and a shield, wherein the shield surrounds the periphery of part of rotating wheel and forms the seal friction smelting space; and a conductor extrusion molding die is arranged at the tail end area of the shield. Compared with the prior art, the invention has small extrusion power consumption and high production efficiency and can simultaneously extrude a plurality of soft aluminum conductors; the obtained conductor has good section consistency and stable quality and can realize continuous infinite length extrusion and finish aluminum softening modification and conductor extrusion once; and the molding device has simple structure.

Description

technical field [0001] The invention is an improvement on the preparation method and the forming device of the soft aluminum conductor for electrical engineering, and in particular relates to a preparation method and the forming device of the soft aluminum conductor with high production efficiency, accurate molding line size and consistent mechanical and electrical properties. Background technique [0002] In order to improve the conductivity of aluminum conductors for power transmission and reduce the loss in the process of transmitting electric energy, people usually use cold-worked and deformed hard aluminum conductors to heat and anneal (for example, 350°C) to change the state of the grain structure and make soft aluminum conductors. The conductivity of the aluminum conductor is increased from 61% IACS to about 63% IACS; in addition, in order to improve the wind resistance of the transmission line, increase the conductor filling factor, and reduce the outer diameter of th...

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Problems solved by technology

The continuous extrusion machine wire production equipment also only changes the shape and size of the cross section through the cold extrusion of the mold cavity, and cannot obtain soft aluminum conductors at the same time.

[0006] In particular, the above-mentioned preparation of aluminum conductors by drawing, drawing (rolling) cold deformation process, one is that the amount of deformation in each pass has a limited value, and the required conductor cannot be obtained by one-time extrusion deformation of a larger diameter aluminum rod, and the other is that aluminum is In the natural state, through the deformation of the mold, only changing the size and / or shape of the section alone will not change the state of the aluminum grain structure to obtain soft aluminum, and cold extrusion deformation, continuous connection cannot be formed between the conductors, due to the aluminum rod The length is limited, so the obtained aluminum conductor has a discontinuous finite length, and it is impossible to obtain a large-length aluminum conductor, which is also not conducive to the preparation of wires

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