CN114101821B - Electrode and preparation method, helical spur gear forming die and helical spur gear - Google Patents

Abstract

The invention relates to the technical field of helical gear production, and provides an electrode and a preparation method thereof, a helical gear forming die and a helical gear; the preparation method of the electrode comprises the following steps: the electrode mould is formed by laminating and combining a plurality of layers of first group of electrode foils, straight-toothed spur gear cavities with preset sizes are formed by cutting all the layers of the first group of electrode foils in a uniform line mode, and the layers of the first group of electrode foils are combined to form a three-dimensional helical-toothed spur gear cavity; cutting the multilayer second group of electrode foils into a plurality of straight spur gear electrodes with preset sizes; embedding all straight-tooth cylindrical gear electrodes into all layers of straight-tooth cylindrical gear cavities corresponding to the three-dimensional helical-tooth cylindrical gear cavities; and sintering the electrode die embedded with the plurality of straight toothed spur gear electrodes to obtain the electrode. By the method, the use of a precise hobbing machine and a fine hobbing cutter thereof is avoided, and the processing difficulty and the processing cost are effectively reduced.

Description

Electrode and preparation method, helical spur gear forming die and helical spur gear

technical field

The invention relates to the technical field of helical gear production, and in particular provides an electrode and a preparation method, a helical gear forming die and a helical gear.

Background technique

In various electrical products, tiny cylindrical gears are widely used. In order to achieve low-cost mass production, metal and plastic micro-cylindrical gears are usually produced by injection molding; therefore, the preparation of gear molds is the key technology.

The mold cavity of the micro spur gear can be processed by the micro wire electrode slow wire EDM process, but the machining of the mold cavity of the micro helical gear is very troublesome. Usually, it is necessary to use a precision gear hobbing machine to process the micro helical teeth first. Cylindrical gear electrodes, and then use micro helical cylindrical gear electrodes to obtain mold cavities through long-term electrical discharge machining on a precision EDM machine with a rotating electric spindle; not only the mold processing cycle is long, but high-end equipment needs to be imported from abroad. High cost. What's more serious is that for particularly tiny helical gears, the preparation of gear hobbing tools is quite difficult or even impossible, and only spur gears of corresponding specifications can be used. However, compared with the spur gear, the helical gear is continuously meshed, the transmission is stable, the noise is low, the workpiece efficiency is high, and the service life is long. Therefore, helical spur gears are the preferred solution.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an electrode and a preparation method, a helical spur gear forming die and a helical spur gear, aiming to solve the problem that the conventional production of the helical spur gear is costly and even impossible to manufacture.

For achieving the above object, the technical scheme adopted in the present invention is:

In a first aspect, the present invention provides a method for preparing an electrode, comprising: stacking and combining multiple layers of the first group of electrode foils to form an electrode mold, and each layer of the first group of electrode foils is uniformly cut to form a straight line with a preset size. Tooth spur gear cavity, the central axis of each spur gear cavity coincides, and each spur gear cavity differs by a preset angle around the center axis along the lamination sequence of the first group of electrode foils, and each straight The tooth spur gear cavity is laminated to form a three-dimensional helical spur gear cavity; the multilayer second group of electrode foils are wire-cut to form a plurality of spur gear electrodes of preset size; the spur gear electrodes are embedded in three-dimensional In each layer of the spur gear cavity corresponding to the helical spur gear cavity; sinter the electrode mold embedded with a plurality of spur gear electrodes to obtain electrodes.

Beneficial effects of the present invention: In the electrode preparation method provided by the present invention, a spur gear cavity of a preset size is formed by wire-cutting the multilayer first group of electrode foils, and the multilayered first group of electrode foils are stacked on top of each other. The layers are combined to form an electrode mold, and each spur gear cavity is combined to form a three-dimensional helical spur gear cavity by rotating one side of each layer at a preset angle, and then a plurality of spur gears are cut on the second group of electrode foils. Electrodes, by embedding these spur gear electrodes into the three-dimensional helical gear cavities corresponding to each layer of spur gear cavities, and forming electrodes by sintering; using the above method to avoid the use of precision gear hobbing machines and their fine gear hobbing tools , effectively reducing the processing difficulty and processing cost.

In one embodiment, in the step of forming the electrode mold by laminating multiple layers of the first group of electrode foils: wire-cutting each layer of the first group of electrode foils to form a spur gear cavity; The first group of electrode foils are stacked in sequence, and each layer of the first group of electrode foils and the first group of electrode foils of the previous layer are all different from the central axis of the cavity of the Cosmic spur gear by a preset angle; The formed electrode mold is clamped and fixed.

By adopting the above-mentioned technical scheme, the first group of electrode foils of each layer are respectively wire-cut to form spur gear cavities, and then the multi-layer first group of electrode foils after wire-cutting are laminated and combined to form electrode molds. And when the layers are stacked in sequence, each layer of the first group of electrode foils is rotated along the orientation of the first group of electrode foils of the previous layer and rotates by a preset angle around the central axis of the spur gear cavity, so that a plurality of spur gears are formed. The spur gear cavity will be combined to form a three-dimensional helical spur gear cavity.

In one embodiment, in the step of assembling the multilayer first group of electrode foils to form the electrode mold: assembling the multilayered first group of electrode foils, and clamping the multilayers of the first group of electrode foils One end of the electrode foil material of each layer is sequentially cut to form a spur gear cavity, and an electrode mold is obtained.

By adopting the above technical solution, the first group of electrode foils of the multi-layer are stacked and assembled and clamped at one end to prevent mutual dislocation between the electrode foils of the first group of layers. The first group of electrode foils were wire-cut to form spur gear cavities to obtain electrode molds and three-dimensional helical spur gear cavities.

In one embodiment, in the step of sequentially cutting each layer of the first group of electrode foils to form spur gear cavities: the first group of electrode foils that have been wire-cut deviates from the first group of wire-cutting One side of the electrode foil is bent; the other side of the first group of electrode foils to be wire-cut away from the first group of electrode foils in the wire-cut is bent.

By adopting the above technical solution, the first group of electrode foils that have been wire-cut and to be wire-cut are respectively bent away from the first group of electrode foils during wire-cutting, so as to avoid the first group of electrode foils during wire-cutting. interfering with each other.

In one embodiment, a block is provided between the first group of electrode foils that have been wire-cut and the first group of electrode foils in wire-cutting, and the first group of electrode foils to be wire-cut Blocks are also arranged between a set of electrode foils.

By adopting the above technical solution, a stopper is provided between the first group of electrode foils in wire cutting and the first group of electrode foils that have been wire-cut and to be wire-cut respectively, so as to avoid the bent first group of electrode foils. Rebound and affect wire cutting.

其中，d为直齿圆柱齿轮型腔的齿轮分度圆直径，l为第一组电极箔材的厚度，β为电极的螺旋角。In one embodiment, the preset angle

Among them, d is the diameter of the gear index circle of the spur gear cavity, l is the thickness of the first group of electrode foils, and β is the helix angle of the electrodes.

By adopting the above technical solution, the corresponding angle can be calculated according to the above-mentioned calculation formula of the preset angle, so as to obtain the electrode of the corresponding size.

In one embodiment, in the step of sintering the electrode mold embedded with a plurality of spur gear electrodes: putting the electrode mold embedded with a plurality of spur gear electrodes into a pressure thermal diffusion welding machine for sintering Pressure sintering; after sintering is complete, the electrode mold is removed.

By adopting the above-mentioned technical scheme, the electrode molds embedded with a plurality of spur gear electrodes are sintered by a pressure thermal diffusion welding machine to obtain electrodes.

In a second aspect, the present invention also provides an electrode, which is formed by sintering the electrode preparation method described above.

Beneficial effects of the present invention: The electrode provided by the present invention is formed by sintering the above-mentioned electrode preparation method, the production process is simple, the production cost is low, and mass production can be realized.

In a third aspect, the present invention also provides a helical spur gear forming die, which is formed by the above-mentioned electrode rotary electrical discharge machining.

Beneficial effects of the present invention: The helical spur gear molding die provided by the present invention is obtained by using the above-mentioned electrodes through electric discharge machining by electric discharge machining. The production cost of the mold is lower.

In a fourth aspect, the present invention also provides a helical-toothed cylindrical gear, and the helical-toothed cylindrical gear is formed by using the above-mentioned helical-toothed cylindrical gear molding die.

Beneficial effects of the present invention: The helical spur gear provided by the present invention has lower production cost on the basis of using the above-mentioned helical spur gear molding die.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of a method for preparing an electrode according to an embodiment of the present invention;

2 is a schematic diagram of an electrode mold provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a layer of a first group of electrode foils provided by an embodiment of the present invention.

Among them, each reference sign in the figure:

10. Electrode mold; 101. Three-dimensional helical gear cavity; 11. The first group of electrode foils; 111. Spur gear cavity.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than An indication or implication that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, is not to be construed as a limitation of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Micro cylindrical gears are widely used in various electrical products. Compared with the spur gear, the helical gear is continuously meshed, the transmission is stable, the noise is low, the workpiece efficiency is high, and the service life is long. Therefore, helical spur gears are the preferred solution. In order to achieve low-cost mass production, metal and plastic micro-cylindrical gears are usually produced by injection molding; therefore, the preparation of gear molds is the key technology. Existing preparation methods usually require the use of a precision gear hobbing machine to first machine a tiny helical spur gear electrode, and then use the tiny helical spur gear electrode to obtain a mold cavity by long-term electrical discharge machining on a precision EDM machine with a rotating electric spindle ; Not only the processing cycle of the mold is long, but the high-end equipment needs to be imported from abroad, and the production cost is high. What's more serious is that for particularly tiny helical gears, the preparation of gear hobbing tools is quite difficult or even impossible, and only spur gears of corresponding specifications can be used.

Thus, the present invention provides an electrode and a preparation method, a helical spur gear forming mold and a helical spur gear, which form a three-dimensional helical gear by combining the spur gear cavities opened on the multi-layer first group of electrode foils. Spur gear cavity, and then wire-cut the second group of electrode foils to form a plurality of spur gear electrodes, and insert the spur gear electrodes into the corresponding spur gear cavity of the three-dimensional helical spur gear cavity, The electrodes are formed by sintering, and the helical spur gear forming mold can be obtained by processing the electrode, and finally the helical spur gear can be mass-produced by using the helical spur gear forming mold. The use of the precision gear hobbing machine and its fine gear hobbing tool is avoided by the above method, which effectively reduces the processing difficulty and processing cost.

Please refer to FIG. 1 to FIG. 3 . In a first aspect, the present invention provides an electrode preparation method, which includes: stacking and combining multiple layers of the first group of electrode foils 11 to form an electrode mold 10 , each layer of the first group of electrode foils The material 11 is uniformly cut to form spur gear cavities 111 of preset size, the central axes of each spur gear cavity 111 are coincident, and each spur gear cavity 111 is along the first group of electrode foils 11 . The lamination sequence is around the central axis and differs by a preset angle, and each spur gear cavity 111 is laminated and combined to form a three-dimensional helical spur gear cavity 101; the multi-layer second group of electrode foils are wire-cut to form a plurality of preset size of spur gear electrodes; insert each spur gear electrode into each layer of spur gear cavity 111 corresponding to the three-dimensional helical spur gear cavity 101; embed electrodes with multiple spur gear electrodes The mold 10 is sintered, and electrodes are obtained.

Wherein, the above-mentioned preset angle refers to that, in the first group of electrode foils 11 of multiple layers, the spur gear cavity 111 of the first group of electrode foils 11 of each layer is relative to the previous layer or The spur gear cavities 111 of the first group of electrode foils 11 in the next layer are all different from each other by the same angle around the central axis, and the difference angle is the preset angle. The preset size refers to the size of the spur gear cavity 111 preset to obtain an electrode of a specific size, wherein the preset size includes the diameter of the index circle, the number of teeth, the module, the pressure angle, the helix angle, and the like. Understandably, in order to obtain electrodes of corresponding shapes, when the first group of electrode foils 11 is wire-cut, the shape and size of the cross-section of the spur gear cavity 111 are consistent with the cross-section of the electrodes.

In the electrode preparation method provided by the present invention, a spur gear cavity 111 with a preset size is formed by wire-cutting the multi-layer first group of electrode foils 11 respectively, and the multi-layer first group of electrode foils 11 are laminated and combined to form Electrode mold 10, and each spur gear cavity 111 is combined to form a three-dimensional helical spur gear cavity 101 by rotating one side of each layer by a preset angle, and then cutting a plurality of spur gears on the second group of electrode foils Electrodes are formed by sintering these spur gear electrodes by embedding these spur gear electrodes into the three-dimensional helical spur gear cavities 101 corresponding to each layer of spur gear cavities 111; by the above method, the use of precision gear hobbing machines and their fine hobbing can be avoided. The tooth cutter effectively reduces the processing difficulty and processing cost.

In one embodiment, in the step of laminating and combining multiple layers of the first group of electrode foils 11 to form the electrode mold 10: wire cutting each layer of the first group of electrode foils 11 to form a spur gear cavity 111; The wire-cut first group of electrode foils 11 are stacked in sequence, and each layer of the first group of electrode foils 11 is different from the first group of electrode foils 11 of the previous layer with respect to the central axis of the spur gear cavity 111 . Preset angle; clamp and fix the electrode mold 10 formed after lamination. That is, in this embodiment, the first group of electrode foils 11 of each layer is firstly cut by wire, so that the first group of electrode foils 11 of each layer is formed with a spur gear cavity 111 of a preset size, and then the The first group of electrode foils 11 are stacked and assembled in sequence to form the electrode mold 10, and the spur gear cavity 111 of each layer is respectively different from the spur gear cavity 111 of the previous layer by a preset angle with respect to the central axis, In this way, the multi-layer spur gear cavities 111 are combined to form a three-dimensional helical spur gear cavity 101; the electrode mold 10 formed after lamination is clamped and fixed to prevent dislocation between the first group of electrode foils 11 of each layer , to avoid damage to the structure of the three-dimensional helical spur gear cavity 101 .

In one embodiment, in the step of forming the electrode mold 10 by laminating and assembling the multiple layers of the first group of electrode foils 11 : the multiple layers of the first group of electrode foils 11 are laminated and assembled, and the multiple layers of the first group of electrode foils 11 are clamped. One end of the electrode foil 11 ; the first group of electrode foils 11 of each layer are sequentially cut to form a spur gear cavity 111 to obtain an electrode mold 10 . That is, in this embodiment, the electrode mold 10 is formed by stacking and combining the first group of electrode foils 11 of multiple layers, and then clamped and fixed, and then the wire cutting operation is performed on each layer of the first group of electrode foils 11 respectively. To obtain the three-dimensional helical spur gear cavity 101 . Understandably, in order to realize the purpose that each spur gear cavity 111 differs by a preset angle along the central axis of the first group of electrode foils 11 along the stacking sequence of the first group of electrode foils 11 , each line cuts the lower first group of electrode foils 11 . When the cutting is performed, the cutting is performed by rotating a preset angle around the central axis of the spur gear cavity 111 of the upper layer. Compared with the method of cutting first and then stacking in the previous embodiment, this embodiment adopts the method of first stacking and fixing and then cutting separately. The size of the helical spur gear cavity 101 is more precise.

In one embodiment, in the step of sequentially cutting each layer of the first group of electrode foils 11 to form spur gear cavities 111 : the first group of electrode foils 11 that have been wire-cut deviates from the wire-cutting One side of the first group of electrode foils 11 is bent; the other side of the first group of electrode foils 11 to be wire-cut away from the first group of electrode foils 11 in the wire-cut is bent. In order to avoid mutual interference between the first group of electrode foils 11 during wire cutting layer by layer, both the first group of electrode foils 11 that have been wire-cut and the first group of electrode foils 11 to be wire-cut are away from the wire-cutting process. The first group of electrode foils 11 is bent, and the end of the first group of electrode foils 11 away from the clamp in the wire cutting is flattened and fixed, and then wire-cut. It can be understood that the spur gear cavities 111 formed by on-line cutting of the first group of electrode foils 11 of each layer are all preset sizes, and the sizes of the spur gear cavities 111 are the same.

In one embodiment, a block is provided between the first group of electrode foils 11 that have been wire-cut and the first group of electrode foils 11 in the wire-cut, and the first group of electrode foils 11 to be wire-cut Blocks are also provided between the first group of electrode foils 11 in the . A stopper is provided to block the rebound of the first group of electrode foils 11 that have been wire-cut and to be wire-cut, so as to avoid affecting the first group of electrode foils 11 during wire-cutting.

其中，d为直齿圆柱齿轮型腔111的齿轮分度圆直径，l为第一组电极箔材11的厚度，β为电极的螺旋角。通过上述预设角度的计算公式可以算出对应的角度，以便于获得对应尺寸的电极。In one embodiment, the preset angle

Wherein, d is the diameter of the gear index circle of the spur gear cavity 111, l is the thickness of the first group of electrode foils 11, and β is the helix angle of the electrode. The corresponding angle can be calculated by the above-mentioned calculation formula of the preset angle, so as to obtain the electrode of the corresponding size.

In one embodiment, in the step of sintering the electrode mold 10 embedded with a plurality of spur gear electrodes: placing the electrode mold 10 embedded with a plurality of spur gear electrodes into a pressure thermal diffusion welding machine Pressure sintering is performed during the sintering process; after the sintering is completed, the electrode mold 10 is removed. The electrode mold 10 in which a plurality of spur gear electrodes are embedded is sintered by a pressure thermal diffusion welding machine to obtain electrodes.

In a second aspect, the present invention also provides an electrode, which is formed by sintering the electrode preparation method described above. The electrode provided by the present invention is formed by sintering the above-mentioned electrode preparation method, the production process is simple, the production cost is low, and mass production can be realized.

In a third aspect, the present invention also provides a helical spur gear forming die, which is formed by the above-mentioned electrode rotary electrical discharge machining. The helical spur gear forming die provided by the present invention is obtained by using the above-mentioned electrode through electric discharge machining by electric discharge machining. Since the production cost of the electrode is low, the production cost of the helical spur gear forming die produced by the electrode is lower. .

In a fourth aspect, the present invention also provides a helical-toothed cylindrical gear, and the helical-toothed cylindrical gear is formed by using the above-mentioned helical-toothed cylindrical gear molding die. The helical-toothed cylindrical gear provided by the present invention has a lower production cost on the basis of using the above-mentioned helical-toothed cylindrical gear forming die to prepare and form.

以上述的方法逐层加工纯铜箔材以获得电极模具10，且电极模具10内由30层尺寸相同且逐层绕于中轴线旋转0.7°的直齿圆柱齿轮型腔111组合形成的三维斜齿圆柱齿轮型腔101。然后再另准备30层纯铜箔材，将这30层纯铜箔材一次性线切割出30层的直齿圆柱齿轮电极；将这30个直齿圆柱齿轮电极逐个嵌装入三维斜齿圆柱齿轮型腔101的各层直齿圆柱齿轮型腔111中，然后将电极模具10以及嵌装入的直齿圆柱齿轮电极放入压力热扩散焊机中进行压力烧结，烧结完成后，去除电极模具10，获得烧结形成的电极，电极的总厚度为3mm。最后，以S136模具钢为加工对象，使用电极在具有旋转电主轴的精密电火花加工机床上通过旋转放电加工获得斜齿圆柱齿轮成型模具，且模具的型腔厚度为3mm。利用该斜齿圆柱齿轮成型模具即可批量生产斜齿圆柱齿轮。Please refer to Figure 1 to Figure 3, taking the actual production as an example, the parameters of the helical cylindrical gear to be produced are: the diameter of the index circle is 5.9594mm, the number of teeth is 28, the normal module is 0.2, the pressure angle is 20°, The helix angle is 20°, and the thickness of the gear is 3mm; pure copper foil with a thickness of 0.1mm is used as the first group of electrode foils 11 and the second group of electrode foils. The 30 layers of pure copper foils are laminated and combined, and one end of the laminated and combined 30 layers of pure copper foils is clamped and fixed from beginning to end to prevent mutual dislocation. Then, the pure copper foil is wire-cut layer by layer to form the multi-layer spur gear cavity 111 . In order to avoid mutual interference between wire-cut pure copper foils, it is necessary to bend the to-be-processed and processed pure copper foils away from the pure copper foils being processed, and block them with stoppers to prevent springback; After the foil is flattened and fixed, the spur gear cavity 111 is formed by wire cutting; the spur gear cavity 111 is processed layer by layer through the above processing method; The dimensions are the same, and the cross-sectional shape and size of the spur gear cavity 111 are set as the cross-sectional shape of the helical spur gear cavity to be obtained. At the same time, when each line cuts the next layer of pure copper foil, the central axis of the cylindrical gear cavity being cut coincides with the central axis of the cylindrical gear cavity that is cut on the previous layer, and the cylindrical gear cavity being cut is being cut. Relative to the cylindrical gear cavity that has been cut on the previous layer, it rotates around the central axis

The pure copper foil is processed layer by layer by the above method to obtain the electrode mold 10, and the electrode mold 10 is composed of 30 layers of spur gear cavities 111 of the same size and rotated by 0.7° around the central axis layer by layer. Tooth spur gear cavity 101 . Then prepare another 30 layers of pure copper foil, and cut the 30 layers of pure copper foil into 30 layers of spur gear electrodes at one time; insert these 30 spur gear electrodes into the three-dimensional helical gear cylinder one by one In the spur gear cavity 111 of each layer of the gear cavity 101, the electrode mold 10 and the embedded spur gear electrode are put into the pressure thermal diffusion welding machine for pressure sintering. After the sintering is completed, the electrode mold is removed. 10. Obtain an electrode formed by sintering, and the total thickness of the electrode is 3 mm. Finally, taking S136 mold steel as the processing object, the helical spur gear forming mold was obtained by rotary electric discharge machining on a precision EDM machine with a rotating electric spindle using an electrode, and the cavity thickness of the mold was 3 mm. The helical spur gear can be mass-produced by using the helical spur gear forming die.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (7)

1. A method of making an electrode, comprising:

laminating and combining a plurality of layers of first group of electrode foils to form an electrode mould, wherein all layers of the first group of electrode foils are cut in an equal line mode to form straight-toothed spur gear cavities with preset sizes, the central axes of all the straight-toothed spur gear cavities are overlapped, all the straight-toothed spur gear cavities sequentially surround the central axes along the lamination of the first group of electrode foils and sequentially differ by preset angles, and all the straight-toothed spur gear cavities are laminated and combined to form a three-dimensional helical gear cavity;

cutting the multilayer second group of electrode foils into a plurality of straight spur gear electrodes with preset sizes in a wire cutting mode;

embedding all the straight-toothed spur gear electrodes into all the straight-toothed spur gear cavities corresponding to the three-dimensional helical-toothed spur gear cavities;

and sintering the electrode die embedded with the plurality of straight toothed spur gear electrodes to obtain the electrode.

2. The method of claim 1, wherein in the step of combining a plurality of first sets of electrode foil stacks to form an electrode mold:

cutting each layer of the first group of electrode foils into straight toothed spur gear cavities;

sequentially laminating the first group of electrode foils after wire cutting, wherein each layer of the first group of electrode foils and the previous layer of the first group of electrode foils rotate for a preset angle relative to the central axis of the straight spur gear cavity;

and clamping and fixing the electrode mould formed after lamination.

3. The method of claim 1, wherein in the step of combining a plurality of first set of electrode foil stacks to form an electrode mold:

combining a plurality of layers of the first group of electrode foils in a laminated manner, and clamping one end of the plurality of layers of the first group of electrode foils;

and sequentially carrying out wire cutting on each layer of the first group of electrode foils to form the straight spur gear cavity, thus obtaining the electrode mould.

4. The method for preparing the electrode according to claim 3, wherein in the step of sequentially wire-cutting each layer of the first group of electrode foils to form the straight spur gear cavities:

bending a side of the first set of electrode foils finished with the wire cutting away from the first set of electrode foils in the wire cutting;

and bending the other side of the first group of electrode foils to be subjected to wire cutting, which is deviated from the first group of electrode foils in wire cutting.

5. The method for producing an electrode according to claim 4, wherein: and a stop block is arranged between the first group of electrode foils for completing the wire cutting and the first group of electrode foils in the wire cutting, and the stop block is also arranged between the first group of electrode foils to be subjected to the wire cutting and the first group of electrode foils in the wire cutting.

6. The method for producing an electrode according to claim 1, wherein: the preset angle

And d is the diameter of the gear pitch circle of the straight spur gear cavity, l is the thickness of the first group of electrode foils, and beta is the helical angle of the electrodes.

7. The method for producing an electrode according to claim 1, wherein: in the step of sintering the electrode mold fitted with a plurality of spur gear electrodes:

putting the electrode mould embedded with a plurality of straight toothed spur gear electrodes into a pressure thermal diffusion welding machine for pressure sintering;

and after sintering is finished, removing the electrode mould.

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