Main shaft assembly of continuous copper extruding machine

Abstract

The invention discloses a main shaft assembly of a continuous copper extruding machine. The main shaft assembly comprises a core shaft, an inner shaft sleeve, an inner side wheel, an outer side wheel,bearings, a pressing sleeve, an extruding wheel and a hydraulic nut, wherein the inner shaft sleeve and the outer shaft sleeve are mounted on the outer side of the core shaft; the bearings are mounted at the outer parts of the inner shaft sleeve and the outer shaft sleeve separately; an axial water inlet, an axial water outlet, a radial water inlet and a radial water outlet are formed in the coreshaft; the axial water inlet communicates with the radial water inlet; the axial water outlet communicates with the radial water outlet; an annular cooling groove is formed in the inner surface of the extruding wheel; and the part between the inner surface of the extruding wheel and the outer surface of the core shaft forms an annular gap which serves as a cooling water channel. According to themain shaft assembly of the continuous copper extruding machine, the cooling water channel of the extruding wheel of the main shaft assembly is changed, so that when the groove temperature of the extruding wheel is controlled and the softening of the extruding wheel in the high temperature area in the groove is reduced, the temperature distribution and stress condition of the extruding wheel are changed, the stress value of the extruding wheel at the dangerous breakdown point is reduced, the service life of the extruding wheel is prolonged, and the equipment operation cost is reduced.

Description

technical field [0001] The invention relates to a copper continuous extrusion machine mainly used for continuous extrusion and continuous coating of copper and copper alloy metals, and also used for cable manufacturing in the wire and cable industry, especially relates to a spindle assembly of a copper continuous extrusion machine . Background technique [0002] The working principle of the copper continuous extrusion machine is: the extrusion wheel is driven by the motor to rotate, the copper rod billet enters the wheel groove of the extrusion wheel, and due to the friction of the groove wall of the wheel groove, the metal rod billet is drawn to the extrusion wheel and the cavity. In the formed arc-shaped extrusion cavity, under the action of high pressure and high temperature generated by friction, the copper rod billet is extruded through the die mouth. The main products include copper flat wire, copper round wire, copper busbar, copper bar, copper strip blank and Specia...

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Problems solved by technology

[0002] The working principle of the copper continuous extrusion machine is: the extrusion wheel is driven by the motor to rotate, the copper rod billet enters the wheel groove of the extrusion wheel, and due to the friction of the groove wall of the wheel groove, the metal rod billet is drawn to the extrusion wheel and the cavity. In the formed arc-shaped extrusion cavity, under the action of high pressure and high temperature generated by friction, the copper rod billet is extruded through the die mouth. The main products include copper flat wire, copper round wire, copper busbar, copper bar, copper strip blank and Special-shaped copper materials, etc., because the extrusion wheel is subjected to the extrusion force during work, and due to the friction between the extrusion wheel and the billet, the vicinity of the extrusion wheel groove and the outer surface of the extrusion wheel are still in a high temperature state. The extrusion temperature is controlled, and the inside of the extrusion wheel is cooled by water. The stress on the extrusion wheel is very complicated. It is not only affected by the extrusion force, but also by the pre-tightening pressure of the spindle. At the same time, the temperature distribution of the extrusion wheel is extremely uneven. , will lead to huge temperature stress. When the temperature is not controlled properly, the extrusion wheel will gradually crack from the inner surface to the outer surface after working for a period of time. When it is completely cracked, the extrusion wheel will be scrapped, which is the scrapping of the extrusion wheel. One of the main ways, the other main way of extrusion wheel damage is the edge of the extrusion wheel groove. Due to continuous work at high temperature, it gradually softens and finally the edge falls off (drop iron). The extrusion wheel is produced by continuous extrusion. The cost of the main wearing parts in the process accounts for more than 30% of the total cost of the continuous extrusion tooling die. Therefore, it is necessary to take technical measures to improve the life of the extrusion wheel and reduce the production cost

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