CN-122007522-A - Non-contact electrochemical machining method and device

Abstract

The invention provides a non-contact electrochemical machining method and device, wherein the electrochemical machining method comprises the steps of preprocessing the surface of a tungsten wire to be machined, penetrating the tungsten wire to be machined into an electrolytic tank module, setting electrolyte concentration, temperature, current density and wire feeding speed, carrying out wire feeding operation on the tungsten wire to be machined through the wire feeding module, enabling the tungsten wire to be machined to pass through the electrolytic tank module in a wire feeding mode, and controlling the dissolution rate of the tungsten wire to be machined when the tungsten wire passes through the electrolytic tank module in the wire feeding process by adjusting electrolytic current of an electrode module according to target reduction and wire feeding speed. The non-contact electrochemical machining method and device of the invention realize continuous, uniform and controllable precise diameter reduction of the large-length-diameter-ratio tungsten filament bus, break through the machining limit, obtain the superfine tungsten filament with better surface quality and more uniform diameter, and reduce the production cost.

Inventors

• GUO ZHENHUI
• SU ZIJIAN

Assignees

• 盐城吉瓦新材料科技有限公司

Dates

Publication Date

20260512

Application Date

20260320

Claims (10)

1. 1. A non-contact electrochemical machining method, comprising: pretreating the surface of a tungsten wire to be processed; threading tungsten wires to be processed into an electrolytic tank module; Setting the concentration, temperature, current density and wire feeding speed of electrolyte; carrying out wire running operation on the tungsten wire to be processed through the wire running module, so that the tungsten wire to be processed passes through the electrolytic cell module in a wire running mode; According to the target diameter reduction and the wire feeding speed, the dissolution rate of the tungsten wire to be processed when passing through the electrolytic tank module in the wire feeding process is controlled by adjusting the electrolytic current of the electrode module.
2. 2. The method of non-contact electrochemical machining according to claim 1, wherein the cell module comprises a plurality of cells connected in series and independently, wherein an alkaline electrolyte is disposed in the cells, the temperature is maintained at 50-70 ℃, and the cell body is made of a corrosion-resistant insulating material.
3. 3. The non-contact electrochemical machining method according to claim 2, wherein an insulating empty space is provided between adjacent cells.
4. 4. The method according to claim 2, wherein a wiper for wiping off the liquid adhering to the surface of the tungsten wire to be processed and a purge unit for purging the tungsten wire to be processed with an inert gas after wiping off the liquid are disposed between the adjacent electrolytic cells.
5. 5. The non-contact electrochemical machining method according to claim 1, wherein the polarities of the electrodes of the adjacent electrolytic cells are alternately arranged.
6. 6. The non-contact electrochemical machining method according to claim 1, further comprising: And carrying out post-treatment operation on the tungsten wire penetrating out of the electrolytic tank module and rolling through the rolling module.
7. 7. A non-contact electrochemical machining device is characterized by comprising an electrolytic tank module, a wire feeding module, an electrode module and a control module, wherein the wire feeding module and the electrode module are respectively and electrically connected with the control module, electrodes of the electrode module are arranged in electrolytic cells of the electrolytic tank module, the wire feeding module carries out wire feeding operation on pretreated tungsten wires to be machined, the tungsten wires to be machined pass through the electrolytic tank module in a wire feeding mode, and the control module controls the dissolution rate of the tungsten wires to be machined when the tungsten wires pass through the electrolytic tank module in the wire feeding process by adjusting the electrolytic current of the electrode module according to a target reduction amount and a wire feeding speed.
8. 8. The apparatus of claim 7, wherein the cell module comprises a plurality of cells connected in series and independently, wherein the cells are configured with alkaline electrolyte at a temperature of 50-70 ℃ and the cell body is made of corrosion-resistant insulating material.
9. 9. The apparatus of claim 7, wherein the insulating empty space is provided between adjacent cells, and electrodes of adjacent cells are alternately arranged in polarity.
10. 10. The device of claim 7, further comprising a post-treatment module and a winding module, wherein the post-treatment module performs post-treatment operation on tungsten wires passing out of the electrolytic tank module, and the winding module winds up the tungsten wires after the post-treatment.

Description

Non-contact electrochemical machining method and device Technical Field The invention relates to the technical field of tungsten filament preparation, in particular to a non-contact electrochemical processing method and device. Background Tungsten wires are used as important refractory metal materials and are widely applied to the fields of illumination, photovoltaics, semiconductors and the like. The current mainstream technology for industrially producing ultrafine tungsten filaments is multi-pass thermomechanical drawing. A representative implementation is to force a thicker tungsten wire blank through a series of tapered cemented carbide or diamond dies and draw it under heating to progressively reduce its diameter to a target size. This process relies on mechanical extrusion of the die and plastic deformation of the material. The prior art has the defects that: 1. Physical limit bottleneck is that when the wire diameter is reduced to the micron level, the die is extremely difficult to manufacture, abrasion is rapidly accelerated, the service life is short, and the replacement is frequent. 2. The risk of broken wires is high, stress concentration is easy to occur in the material during drawing, the toughness of the microfilaments is reduced, broken wires are easy to occur, and the continuous production efficiency and the yield are affected. 3. The surface quality and uniformity are difficult to control, mechanical drawing leaves scratches or textures on the surface of the wire, and the diameter uniformity along the length direction is difficult to ensure accurately. 4. The cost is high, the superfine die is high in price, the consumption is quick, and the whole production cost is high. Disclosure of Invention The invention aims to provide a non-contact electrochemical machining method and device, which aim to overcome the defects of the traditional drawing, realize continuous, uniform and controllable precise diameter reduction of a large-length-diameter ratio tungsten wire bus, break through the machining limit, obtain a superfine tungsten wire with better surface quality and more uniform diameter, and reduce the production cost. The non-contact electrochemical processing method provided by the embodiment of the invention comprises the following steps: pretreating the surface of a tungsten wire to be processed; threading tungsten wires to be processed into an electrolytic tank module; Setting the concentration, temperature, current density and wire feeding speed of electrolyte; carrying out wire running operation on the tungsten wire to be processed through the wire running module, so that the tungsten wire to be processed passes through the electrolytic cell module in a wire running mode; According to the target diameter reduction and the wire feeding speed, the dissolution rate of the tungsten wire to be processed when passing through the electrolytic tank module in the wire feeding process is controlled by adjusting the electrolytic current of the electrode module. Preferably, the electrolytic tank module comprises a plurality of electrolytic tanks which are connected in series and are independent, alkaline electrolyte is arranged in the electrolytic tanks, the temperature is maintained at 50-70 ℃, and the tank body is made of corrosion-resistant insulating materials. Preferably, an insulating empty space is arranged between adjacent electrolytic cells. Preferably, a liquid scraper and a purging unit are arranged between the adjacent electrolytic tanks, the liquid scraper is used for scraping liquid attached to the surface of the tungsten wire to be processed, and the purging unit is used for purging the tungsten wire to be processed by inert gas after the liquid is scraped. Preferably, the electrodes of adjacent cells are arranged with alternating polarities. Preferably, the non-contact electrochemical machining method further comprises: And carrying out post-treatment operation on the tungsten wire penetrating out of the electrolytic tank module and rolling through the rolling module. The invention further provides a non-contact electrochemical machining device which comprises an electrolytic tank module, a wire feeding module, an electrode module and a control module, wherein the wire feeding module and the electrode module are respectively and electrically connected with the control module, electrodes of the electrode module are arranged in an electrolytic small tank of the electrolytic tank module, the wire feeding module carries out wire feeding operation on the pretreated tungsten wire to be machined, the tungsten wire to be machined passes through the electrolytic tank module in a wire feeding mode, and the control module controls the dissolution rate of the tungsten wire to be machined when passing through the electrolytic tank module in the wire feeding process by adjusting the electrolytic current of the electrode module according to the target diameter reduction and the wire feeding spee