Electrolytic processing cathode with replaceable working teeth for large-diameter complex spiral wire

Abstract

The invention belongs to the technical field of electrolytic processing, and specifically relates to an electrolytic processing cathode with replaceable working teeth for a large-diameter complex spiral wire. The electrolytic processing cathode with replaceable working teeth for the large-diameter complex spiral wire comprises a front guider, a cathode body and a rear guider, wherein an original integrated cathode body is replaced by a split structure, and cathode working teeth are fixedly connected to the cathode body; a structure that one end connected to a pulling rod is provided with a connector and a protecting sleeve; in case of fault, the cathode body and the connector can be replaced; an empty cavity is formed between a cathode connecting body and the front guider, and an inclinedhole for draining liquid is formed in the front guider and is capable of increasing the electrolyte pressure. With the adoption of the electrolytic processing cathode with replaceable working teeth for the large-diameter complex spiral wire, the engineering application of an electrolytic processing technology of large-diameter complex spiral wire type parts such as a cannon tube rifle, an irregular spiral spline and an all-metal screw drilling tool for oil drilling and production can be realized; and the cathode research and development period can be reduced; and the cost can be decreased.

Description

technical field [0001] The invention belongs to the technical field of electrolytic machining, and in particular relates to a large-diameter complex helical electrolytic machining cathode with replaceable working teeth. Background technique [0002] Large-caliber (caliber ≥ 80mm) complex helix (length ≥ 8000mm, spiral groove width > 6mm, depth > 2mm) parts are widely used in barrel rifling, special-shaped spiral splines, oil drilling all-metal screw drilling tool stators and screws pump. This type of parts adopts the traditional mechanical broaching method, not only the price of the tool is high, but also the processing cost is extremely expensive; with the further improvement of the material hardness, the material hardness of the new product reaches HRC48-50, and the spiral groove is getting deeper and deeper. The traditional Mechanical broaching is difficult and inefficient. [0003] Since the 1950s, with the continuous development of CNC electrolytic machining tec...

AI Technical Summary

Problems solved by technology

Under the processing conditions of long time, high current, small gap, and high flow rate, the original cathode may be short-circuited during the electrolytic machining process, or the temperature of the cathode working teeth in some areas is high, and the heat generated by the cathode is large, resulting in burns on the insulation layer.

2. During the initial processing of the original cathode, that is, when the cathode teeth have not completely entered the parts with large-diameter deep and long holes, the electrolyte enters the processing gap from the inclined hole. When the electrolyte flows, it often flows along the direction that is conducive to water flow; the original There is a cathode tooth structure to allow the electrolyte to flow from the large end of the cathode tooth to the small end, which is consistent with the direction of movement of the cathode, but an additional sealing device is required to achieve this, which not only increases the manufacturing cost of the part, but also increases the cost of the large diameter and deep spiral. Precision electrolytic machining raises the bar

3. The two sections of holes in the original patent (discharge small hole B, discharge small hole A) need to be installed accurately, not only the processing is difficult, but also the strength of the cathode body and the rear guide will be reduced

4. The thread in front of the original cathode body is threadedly connected with the horizontal electrolytic processing rod. The long-term installation and disassembly of the cathode will cause thread wear. Once worn, the entire cathode body needs to be replaced, which wastes materials and increases the cost. cost

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