Stator core for motorcycle magneto and its processing technology

Abstract

The present invention is a stator core for a motorcycle magneto and its processing technology, and relates to the field of motorcycle magneto stator core. The present invention includes a core body and a plurality of winding legs, wherein the cross-sectional shape of the core body is an octagonal structure, each side is provided with a groove, the middle part of the core body is a central circular hole, and the winding legs are a T-shaped structure, including a front connecting section, a rear arc pole arc and a middle winding part, the front connecting section is placed in the groove and forms an interference fit, the outer end face of the rear arc pole arc is an arc surface, and each winding leg is symmetrically divided into two halves of the same shape, and the two halves are bonded and bonded to each other to form a winding leg. Combined with the processing technology of the present invention, the coating and drying process of the insulating material is improved, and the present invention can save a lot of materials and reduce the production cost during the processing process, and can effectively achieve coating uniformity and stability.

Description

Technical Field

[0001] The invention relates to the field of motorcycle magneto stator cores, in particular to a motorcycle magneto stator core and a processing technology thereof. Background Art

[0002] The stator core of a motorcycle magneto is one of its key components, and its design and processing have an important impact on the performance of the motor. The stator core of a conventional motorcycle magneto is usually made of silicon steel sheets, which are formed by stamping into sheets and then stacking. A typical stator core structure includes a core body and a winding leg, wherein the cross-sectional shape of the core body is mostly an octagon, with grooves on each side and a circular hole in the middle to accommodate the components of the motor rotor, and the winding leg is formed by interference fit with the core body or is integrally formed. A major disadvantage of the prior art is that the manufacturing complexity of the conventional stator core is relatively high. During the stamping process, additional materials are usually reserved to ensure the accuracy and integrity of the stamping, which leads to material waste, especially in large-scale production, where the accumulated material waste will significantly increase the cost and environmental burden. That is to say, in the prior art, there is no technology that involves a certain improvement in the shape of the winding leg to cooperate with the more appropriate use of raw materials in the stamping process, reduce material waste, and reduce costs. In addition, the core coating process in the prior art cannot better guarantee the uniformity and stability of the coating. Summary of the invention

[0003] The present invention aims to solve the problems of the prior art and provide a stator core for a motorcycle magneto and a processing technology thereof. The structure of the stator core is improved so that a large amount of materials can be saved in its production process, reducing the production cost; and the uniformity and stability of the insulating coating are guaranteed through the process.

[0004] The present invention is achieved through the following technical solutions:

[0005] A stator core for a motorcycle magneto comprises a core body and a plurality of winding legs, wherein the cross-sectional shape of the core body is an octagonal structure, each side of which is provided with a groove, the middle part of the core body is a central circular hole, the winding legs are a T-shaped structure, comprising a connecting section at the front end, an arc-shaped pole arc at the rear end and a winding part in the middle, the connecting section at the front end is placed in the groove and forms an interference fit, the outer end face of the arc-shaped pole arc at the rear end is an arc-shaped face, and each winding leg is symmetrically divided into two halves of the same shape, and the two halves are bonded and bonded to each other to form a winding leg.

[0006] In a further scheme, the core body is formed by stacking and riveting main body punching sheets, and the shape of each main body punching sheet is consistent with the cross-sectional shape of the core body. The winding foot is divided into two halves, which are respectively formed by stacking and riveting foot punching sheets. After stacking and riveting, the two halves of the winding foot are bonded and adhered to each other to form a winding foot. The cross-sectional shape of the winding foot is symmetrically divided into two halves of the same shape from the center line, and the shape of each foot punching sheet is consistent with the cross-sectional shape of the winding foot of this half.

[0007] In a further solution, the groove is a flat-bottomed groove with two side walls concave inwardly, the top surface of the winding leg connecting section is flush with the flat-bottomed groove, and its side surface forms an arc-shaped convexity that fits the side wall of the groove, and the height of the arc-shaped convexity does not exceed one-third of the height of the arc-shaped pole arc, wherein the height of the arc-shaped convexity is: the size of the protrusion of the highest point of the arc-shaped convexity relative to the surface of the winding part, and the height of the arc-shaped pole arc is: the size from the most extended position of the arc-shaped pole arc to the surface of the winding part.

[0008] A processing technology for a stator core for a motorcycle magneto comprises the following steps:

[0009] a. Select silicon steel sheets as the material for making the stator core, and use a stator punching die to punch out the main body punching sheets according to the cross-sectional shape of the core body, and use a stator punching die to punch out the leg punching sheets according to the shape of the leg punching sheets;

[0010] b. The punched main body punching sheets and the leg punching sheets are stacked separately, and the stacked main body punching sheets and the leg punching sheets are placed in the stacking and riveting positioning tooling respectively, and the main body punching sheets are riveted and fixed by a hydraulic press to form the iron core body, and the leg punching sheets are riveted and fixed to form a half-width winding leg, and the two half-width winding legs are bonded and attached to each other to form a winding leg;

[0011] c. The connecting section of the winding leg is formed into an interference fit with the groove of the core body to form the core;

[0012] d. Place the fixed iron core in an oven for baking to evaporate the oil stains and moisture between the iron core body punching sheets and the support leg punching sheets, ensuring the firmness after the subsequent coating of the insulating material;

[0013] e. Place the iron core in the coating positioning tooling and heat it in the heating ring;

[0014] f. Place the heated iron core in a paint bucket filled with epoxy insulation powder, stir it repeatedly, and take it out after the thickness of the insulation layer attached to the iron core meets the requirements;

[0015] g. Take out the iron core coated with the insulation layer from the coating positioning tooling, cool it, and then put it into an oven to bake until the insulation layer is cured;

[0016] h. Position the solidified and cooled iron core with the center circular hole as the reference, place it in the CNC lathe turning tooling, and cut the outer diameter of the iron core according to the standard size requirements.

[0017] In a further embodiment, in step d, the baking time in the oven is 1-2 hours at a temperature of 100-155°C; in step g, the baking time in the oven is 1-2 hours at a temperature of 160-180°C.

[0018] In a further scheme, in step a, a main body punch and a leg punch are punched out on a silicon steel sheet material at the same time using a stator die, and the method adopted is: punching in sequence along the length direction of the silicon steel sheet material according to the shape of the main body punch to form multiple columns of main body punches parallel to each other along the length direction of the silicon steel sheet material, and two adjacent main body punches in each column are spaced apart to form a spacing portion, and in the upper and lower directions of the spacing portion, there are a main body punch in an upper and lower column respectively, and in the upper and lower directions of one of the main body punches, there are a spacing portion in an upper and lower column respectively, forming a structure with multiple columns arranged in parallel as a whole, and in the same column, two adjacent main body punches are spaced apart by a spacing portion, and the main body punches in two adjacent columns are staggered; at the same time, a stator die is set to punch out at least one leg punch at each spacing portion.

[0019] In a further scheme, in step a, the method of punching out the main punching sheet material on the silicon steel sheet material with a stator die is: punching in sequence along the length direction of the silicon steel sheet material according to the shape of the main punching sheet to form multiple columns of main punching sheets parallel to each other along the length direction of the silicon steel sheet material, and the main punching sheets of two adjacent columns are staggered, wherein the center of the central circular hole of each main punching sheet, the center of the central circular holes of two adjacent main punching sheets in an adjacent column, and the center of the central circular holes of the three main punching sheets are collectively the three vertices of an equilateral triangle.

[0020] In a further scheme, in step a, the method of punching out the support leg punching material on the silicon steel sheet material using a stator die is: punching in sequence along the length direction of the silicon steel sheet material according to the shape of the support leg punching to form a multi-row support leg punching structure arranged in parallel along the length direction of the silicon steel sheet material, and the uppermost and lowermost ends of each row of support leg punchings respectively form a straight line, which is consistent with the length direction of the silicon steel sheet material.

[0021] In a further solution, the length direction of each support leg punching sheet is consistent with the length direction of the silicon steel sheet material, and the two adjacent support leg punching sheets in each column are separated, and a part of the arc pole arc of one of the support leg punching sheets in the lower column is located at the position where the two support leg punching sheets in the upper column are separated.

[0022] In a further scheme, the length direction of each support leg punching sheet forms an acute angle with the length direction of the silicon steel sheet material, and the direction of the support leg punching sheets in each column is consistent. The length directions of two adjacent support leg punching sheets are arranged in parallel, and a part of one of the support leg punching sheets is placed in the empty space where the arc pole arc of the adjacent support leg punching sheet intersects with the winding part.

[0023] The present invention has the following beneficial effects:

[0024] In the processing technology of the present invention, after the punching sheets are stacked, they are riveted and fixed to each other on the stacking and riveting positioning tooling to ensure their stable combination; in addition, before and after the insulating material is coated, two drying processes are set, namely drying and curing processes, and oven baking is adopted, and the drying and curing temperatures and durations are set, so that on the one hand, the iron core is kept dry before coating to ensure the firmness of the insulating layer after coating, and on the other hand, the hardness of the insulating layer after coating can be cured; in the present invention, the insulating material layer is coated, the iron core is placed in a paint bucket of epoxy insulating powder and repeatedly stirred back and forth, and the insulating layer is taken out after the thickness reaches the set requirements, and then cured. The insulating layer coating and drying processes of the present invention can effectively achieve coating uniformity and stability.

[0025] The iron core body of the present invention adopts an octagonal cross-sectional structure, and a groove is arranged on each side to cooperate with the winding support leg, and the structure of the winding support leg is improved. It is different from the prior art in which the support leg punching sheet is directly designed to be in the shape of the winding support leg cross-sectional shape. The innovative improvement is to symmetrically arrange it into two halves from the middle, and use the shape of this half as the shape of the support leg punching sheet for production. It can be better laid out on the raw material during the stamping process to minimize its iron loss, and the support leg punching sheet can form an overall T-shaped structure after overlapping riveting and bonding with an adhesive. The front end connecting section has an interference fit with the groove, and the rear end arc-shaped pole arc is optimized. The optimization of these structural designs helps to improve the efficiency and power density of the motor.

[0026] The support leg punching sheet in the present invention, on the one hand, in order to ensure that its structure meets the design requirements and forms a T-shaped winding leg as a whole, and on the other hand, it also needs to be able to achieve effective connection with the core body, so a connecting section structure with an arc surface is provided, which forms an interference fit with the groove of the core body to ensure effective connection. On the other hand, it is also necessary to consider the rationality of the layout of the support leg punching sheet of this structure on the raw materials and the maximum utilization rate of the raw materials, and the height of the arc-shaped protruding part of the connecting section and the height of the arc-shaped pole arc are designed. When laid out on the raw materials, the two adjacent support leg punching sheets can be as close as possible to reduce the gap in the middle. Compared with the prior art of directly making T-type punching sheets, it can minimize iron loss and reduce costs; when the main punching sheet is punched, the octagonal structure can be better laid out. Except for the four upper, lower, left and right sides of the octagonal structure, the other four sides can be close to the corresponding sides of other main punching sheets, so that the gap between each main punching sheet is minimized, thereby minimizing iron loss during processing; in addition, in processing scenarios where it is not suitable to process the main punching sheet at close range or when the product specifications are different, the gap between the main punching sheets can be appropriately increased, and at the position of the gap, a stamping equipment that can process the support leg punching sheet is set at the same time, so that the main punching sheet and the support leg punching sheet can be processed at the same time. When the gap is appropriate, one or more support leg punching sheets can be processed at the position of the gap. The layout of the support leg punching sheet at the gap position can refer to the layout when the support leg punching sheet is processed separately, which can also maximize the utilization rate of raw materials.

[0027] The present invention adopts a stacking riveting method to ensure that the structures of the core body and the winding legs are not deformed, and the process is simple, thereby ensuring the combination quality and stability of the core body and the winding legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the stator core structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the main punching structure of the present invention;

[0031] Figure 3 for Figure 1 The enlarged schematic diagram of the structure of part A is a schematic diagram of the structure of the winding support of the present invention;

[0032] Figure 4 for Figure 2 A schematic diagram of the structure of part B in the middle is enlarged;

[0033] Figure 5 This is a schematic diagram of the support leg punching structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the layout of simultaneously processing the main body punching sheet and the supporting leg punching sheet on the raw material in an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the layout of processing the support leg punching sheet on the raw material in an embodiment of the present invention;

[0036] Figure 8 Another schematic diagram of the layout of processing the support leg punching sheet on the raw material in the embodiment of the present invention;

[0037] Fig. 9 It is a schematic diagram of the layout of processing the main punching sheet on the raw material in an embodiment of the present invention;

[0038] Fig.10 Another schematic diagram of the layout of processing a main punching sheet on a raw material in an embodiment of the present invention;

[0039] Fig.11 for Fig.10 The enlarged schematic diagram of the structure of part C in the middle;

[0040] The reference numerals shown in the figure are: 1 is the core body, 2 is the winding support leg, 3 is the groove, 4 is the center circular hole, 5 is the spacing part, 6 is the empty space, 11 is the main body punching sheet, 21 is the connecting section, 22 is the arc-shaped pole arc, 23 is the winding part, 24 is the support leg punching sheet, 211 is the top surface, 212 is the arc-shaped convexity, 31 is the side wall, and 221 is the most extended position. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0042] The present invention is a stator core for a motorcycle magneto and a processing technology thereof. In this embodiment, the processing technology of the present invention is first described, which includes the following steps:

[0043] a. Select silicon steel sheets as the material for making the stator core, and follow the core specifications and models required by the design, such as Figure 6-Figure 11 As shown, the main body punching sheet 11 is punched out by a stator punching die according to the cross-sectional shape of the core main body 1, and the leg punching sheet 24 is punched out by a stator punching die according to the shape of the leg punching sheet 24;

[0044] b. According to the core specifications and models required by the design, the punched main body punching sheets 11 and the leg punching sheets 24 are stacked respectively, and the stacked main body punching sheets 11 and the leg punching sheets 24 are respectively placed in the stacking and riveting positioning tooling, and the main body punching sheets 11 are riveted and fixed by a hydraulic press to form the core body 1, and the leg punching sheets 24 are riveted and fixed to form a half-width winding leg 2, and the two half-width winding legs 2 are bonded and attached to each other to form a complete winding leg 2;

[0045] c. Figure 1-Figure 2 As shown, the connecting section 21 of the winding leg 2 is formed into an interference fit with the groove 3 of the core body 1 to form an iron core;

[0046] d. Place the fixed iron core in an oven and bake it for 1-2 hours at a temperature of 100-155°C. The baking time and temperature can be adjusted according to the specifications of the iron core to evaporate the oil stains and moisture between the iron core body punching sheet 11 and the support leg punching sheet 24 to ensure the firmness after the subsequent coating of the insulating material;

[0047] e. Place the iron core in the coating positioning tooling and heat it in the heating ring;

[0048] f. Place the heated iron core in a paint bucket filled with epoxy insulation powder, stir it repeatedly, and take it out after the thickness of the insulation layer attached to the iron core meets the requirements;

[0049] g. Take out the iron core coated with the insulation layer from the coating positioning tooling, cool it, and then put it into an oven to bake until the insulation layer hardens. The baking time is 1-2 hours at a temperature of 160-180°C. The baking time and temperature can be adjusted according to the specifications of the iron core and the required thickness of the insulation layer.

[0050] h. Position the solidified and cooled iron core with the center circular hole 4 as the reference, place it in the turning tool of the CNC lathe, and cut the outer diameter of the iron core according to the standard size requirements.

[0051] The present invention improves the structure of the stator core and combines the processing technology to achieve the purpose of reducing the cost of processing raw materials. For the technology of the stator core of the motorcycle magneto, there are relatively mature structural designs and manufacturing methods in the prior art, which are basically improved by improving the shape and internal connection method of the core body 1, or improving the winding position of the winding legs 2, and improving the stacking method of the punching sheets, in order to make the structure more solid and reliable, or save some winding materials, and also designing the layout of the T-shaped winding legs in different positions on the raw materials, in order to reduce iron loss. However, in the prior art, there is no more reasonable design for how to design a reasonable shape structure and combine the design of the layout of the raw material punching sheet production, and cooperate with the design of the corresponding processing technology.

[0052] This embodiment further explains and illustrates the structure and process of the present invention. Figure 1 As shown, a stator core for a motorcycle magnetic motor of the present invention is provided with a core body 1 in the overall structure. In this embodiment, an octagonal cross-sectional shape is adopted, and a groove 3 structure is provided on each side. A winding leg 2 is provided in each groove 3 structure, wherein one end of the winding leg 2 forms an interference fit with the groove 3, and the stator core is constituted as a whole.

[0053] The present invention has several improvements: first, Figure 3 and Figure 5 As shown, the winding foot 2 is designed as a two-part structure, which is divided into two parts of the same shape from the center line of the winding foot 2, namely the above-mentioned half-width winding foot 2. Therefore, in combination with the manufacturing process, the foot punching sheet 24 punched out on the raw material is in the shape of half the cross-sectional shape of the winding foot 2. After multiple foot punching sheets 24 are stacked, they are riveted and fixed by a hydraulic press. Then, the two stacked half-width winding feet 2 are bonded together to form an integral winding foot 2. The foot punching sheet 24 in the shape of the half-width winding foot 2 will have a more flexible and more comprehensive layout strategy on the stamped raw material. Secondly, one end of the winding foot 2 of the present invention is set as a connecting section 21, and the connecting section 21 matches the groove 3 of the core body 1, such as Figure 3 and Figure 4 As shown, the two side walls 31 of the groove 3 are designed to be concave arcs, the top surface 211 of the connecting section 21 of the winding leg 2 is flush with the flat-bottomed groove 3, and the two side edges of the connecting section 21 are designed to be arc-shaped protrusions 212. When the connecting section 21 and the groove 3 are interference-fitted, the arc-shaped protrusions 212 are matched with the two side walls 31 of the groove 3. Again, as Figure 5As shown, in the present invention, the rear end of the support leg punching sheet 24 is the arc-shaped pole arc 22, and the middle part is the winding part 23. Since the arc-shaped pole arc 22 is wider than the winding part 23, a space 6 is formed between the arc-shaped pole arc 22 and the winding part 23 and the arc-shaped outer protrusion 212. At the same time, the arc-shaped outer protrusion 212 is slightly larger than the winding part 23. When the support leg punching sheets 24 are arranged on the raw material, most of one of the support leg punching sheets 24 can be placed in the space 6 and as close as possible, such as Figure 7 and Figure 8 As shown, the area of ​​the gap is reduced, and a plurality of leg punching sheets 24 can form a dense and mutually close layout of the leg punching sheets 24. In order to ensure that the arc-shaped protrusion 212 has a certain protrusion height to be able to fit closely with the groove 3, there can also be as large a space 6 as possible for the layout of the leg punching sheets 24. In the present invention, the height of the arc-shaped protrusion 212 relative to the winding part 23 is designed. Relative to the height difference between the most extended position 221 of the arc-shaped pole arc 22 and the surface of the winding part 23, the height of the arc-shaped protrusion 212 does not exceed one-third of the height of the arc-shaped pole arc 22, which is a preferred structure. In addition, after the main body punching sheets 11 of the present invention are stacked, they are riveted and fixed by a hydraulic press to form the core body 1 structure, such as Figure 2 As shown, each main body punching sheet 11 is designed as an octagonal structure. There are many ways to layout the raw materials. In this embodiment, there are two ways: one is to form a multi-row parallel layout of the octagonal structure of the main body punching sheet 11 in the length direction of the raw material, such as Fig.10 As shown, two adjacent main body punching sheets 11 in each row are arranged as close as possible, and the main body punching sheets 11 in adjacent rows are staggered by a certain distance, so that the center circular hole 4 of one main body punching sheet 11 is just opposite to the middle of the two main body punching sheets 11 in the upper row or the lower row, so as to reduce the gap as much as possible, and the center points of the center circular holes 4 of the three adjacent main body punching sheets 11 can form an equilateral triangle structure together, such as Fig.11 Another method is to increase the spacing between the main punching sheets 11 in each column, such as Fig. 9 As shown, the enlarged portion is set as the spacing portion 5, and the spacing portion 5 can be arranged with the support leg punching sheet 24, such as Figure 6 As shown, a stator die can be provided at the same time to punch out one or more leg punching sheets 24. The above-mentioned multiple innovative points and their combination are aimed at simplifying the manufacturing process, saving the manufacturing cost, and effectively ensuring its stability.

[0054] The following is a detailed description of each innovative part of the present invention:

[0055] In the present invention, in order to better manufacture the leg punching sheet 24, the winding leg 2 is configured to be two symmetrically distributed parts of the same shape, such as Figure 5As shown, each part is formed by stacking the leg punching sheet 24 and riveting it through a hydraulic press, and the two parts are bonded to each other to form the entire winding leg 2. This structural design and the combination of stacking and bonding can make the manufacturing process simpler. In addition, this structural design makes it possible to arrange the leg punching sheet 24 more reasonably on the raw materials. In the present invention, the winding leg 2 is designed as a T-shaped structure, such as Figure 3 As shown, the T-shaped structure is divided from the center line into half structures of the same shape, namely the half-shaped leg punching sheet 24. Each half-shaped leg punching sheet 24 includes an arc-shaped pole arc 22, a winding portion 23 and a connecting section 21. The connecting section 21 is used to perform interference fit with the groove 3 of the main punching sheet 11 to ensure its stability. Figure 5 As shown, the arc-shaped pole arc 22, the winding portion 23 and the connecting section 21 together form a space 6 for winding, and the space 6 plays an important role in the layout of the support leg punching sheet 24 on the raw material, such as Figure 5 , Figure 7 and Figure 8 As shown, each leg punching sheet 24 is arranged in sequence in the same direction, and another leg punching sheet 24 is arranged in the empty space 6 of one leg punching sheet 24. Most of the other leg punching sheet 24 can be accommodated in the empty space 6, and the gap between them is reduced as much as possible, so that the raw materials can be utilized to the greatest extent and iron loss can be reduced. When multiple leg punching sheets 24 are arranged in sequence, they will form a row or a column arranged in the same direction, and finally form a state of multiple rows or columns arranged in parallel on the raw material. The multiple rows or columns can be arranged along the length direction of the raw material, or they can be arranged at a certain angle to the length direction of the raw material, such as Figure 8 In the inclined arrangement shown, since each leg punch 24 needs to be offset to a certain extent so that the upper leg punch 24 can be placed in the empty space 6 of the lower leg punch, it is more reasonable to form an arrangement with a certain inclination angle, that is, the overall shape forms multiple rows consistent with the length direction of the raw material, and at the same time, it also forms multiple rows in an inclined state in the width direction of the raw material. Figure 7 The arrangement shown is to tilt a plurality of leg punching sheets 24 and then sequentially arrange them in a plurality of columns or rows along the length direction of the raw material.

[0056] In this embodiment, the main punching sheet 11 is punched out from the raw material of the silicon steel sheet, and the layout of the main punching sheet 11 needs to be performed on the raw material to reduce the iron loss as much as possible. Figure 2 , Figure 6 , Figure 9-11As shown, the main punching sheet 11 is designed as an octagonal structure, and each side is provided with a groove 3 for cooperating with the winding foot 2. The two side walls 31 of the groove 3 are concave and match the arc-shaped protrusion 212 of the winding foot 2. Based on the octagonal structure of the main punching sheet 11, there are two ways to set it on the raw material: one is to arrange it on the raw material according to its length direction and punch out the main punching sheet 11. At this time, the main punching sheet 11 needs to be arranged as compactly as possible on the raw material to reduce iron loss. Specifically, the octagonal structure of the main punching sheet 11 is formed into multiple columns of parallel layout in the length direction of the raw material, such as Fig.10 As shown, two adjacent main body punching sheets 11 in each row are arranged as close as possible, and the main body punching sheets 11 in adjacent rows are staggered by a certain distance, so that the center circular hole 4 of one main body punching sheet 11 is just opposite to the middle of the two main body punching sheets 11 in the upper row or the lower row, so as to reduce the gap as much as possible, and the center points of the center circular holes 4 of the three adjacent main body punching sheets 11 can form an equilateral triangle structure together, such as Fig.11 Another method is to simultaneously punch out the main body punching sheet 11 and the leg punching sheet 24 on the raw material, specifically, the interval between the main body punching sheets 11 in each column is increased, such as Fig. 9 As shown, the enlarged portion is set as the spacing portion 5, and the spacing portion 5 can be arranged with the support leg punching sheet 24, such as Figure 6 As shown, the stator punching die can be simultaneously provided to punch out one or more leg punching sheets 24 .

[0057] In this embodiment, for the processing technology, in step a, the layout design of the punching sheets needs to be pre-designed on the silicon steel sheet raw material to maximize the utilization of the raw material, reduce iron loss, and reduce the production cost. There are several main ways to adopt: 1. One is to layout as many leg punching sheets 24 as possible on the raw material, and punch out as many leg punching sheets 24 as possible; 2. Another is to punch out as many main body punching sheets 11 as possible; 3. It is also possible to punch out as many main body punching sheets 11 and leg punching sheets 24 as possible on a piece of raw material at the same time.

[0058] Specifically, they can be described as:

[0059] 1. In the step a, the method of punching out the support leg punching sheet 24 material on the silicon steel sheet material with a stator punching die is: punching in the shape of the support leg punching sheet 24 in sequence along the length direction of the silicon steel sheet material to form a structure of multiple columns of support leg punching sheets 24 arranged in parallel along the length direction of the silicon steel sheet material, and the uppermost and lowermost ends of each column of support leg punching sheets 24 respectively form a straight line, which is consistent with the length direction of the silicon steel sheet material. In view of this method, two layout situations are provided in this embodiment: the first is: the length direction of each support leg punching sheet 24 is consistent with the length direction of the silicon steel sheet material, and the two adjacent support leg punching sheets 24 in each column are spaced apart, and a part of the arc-shaped pole arc 22 of one of the support leg punching sheets 24 in the lower column is located at the position where the two support leg punching sheets 24 in the upper column are spaced apart. The second type is: the length direction of each support leg punching sheet 24 forms an acute angle with the length direction of the silicon steel sheet material, and the direction of the support leg punching sheets 24 in each column is consistent, and the length directions of two adjacent support leg punching sheets 24 are arranged in parallel, and a part of one of the support leg punching sheets 24 is placed in the empty space 6 where the arc-shaped pole arc 22 of the adjacent support leg punching sheet 24 intersects with the winding portion 23.

[0060] 2. In the step a, the method of punching out the main body punching sheet 11 material on the silicon steel sheet material with a stator die is as follows: the main body punching sheet 11 is punched in sequence along the length direction of the silicon steel sheet material according to the shape of the main body punching sheet 11 to form multiple columns of main body punching sheets 11 parallel to each other along the length direction of the silicon steel sheet material, and the main body punching sheets 11 in two adjacent columns are staggered, wherein the center of the central circular hole 4 of each main body punching sheet 11, the center of the central circular holes 4 of two adjacent main body punching sheets 11 in an adjacent column, and the centers of the central circular holes 4 of the three main body punching sheets 11 are collectively the three vertices of an equilateral triangle.

[0061] 3. In the step a, a main body punching sheet 11 and a leg punching sheet 24 are punched out on the silicon steel sheet material by a stator punching die at the same time. The method adopted is: punching is performed in sequence along the length direction of the silicon steel sheet material according to the shape of the main body punching sheet 11 to form a plurality of columns of main body punching sheets 11 parallel to each other along the length direction of the silicon steel sheet material. Two adjacent main body punching sheets 11 in each column are spaced apart to form a spacing portion 5. In the upper and lower directions of the spacing portion 5, there are a main body punching sheet 11 in the upper and lower columns respectively. In the upper and lower directions of one of the main body punching sheets 11, there are a spacing portion 5 in the upper and lower columns respectively. As a whole, a structure of a plurality of columns arranged in parallel is formed. In the same column, two adjacent main body punching sheets 11 are spaced apart by a spacing portion 5. The main body punching sheets 11 in the two adjacent columns are arranged alternately. At the same time, a stator punching die is set to punch out at least one leg punching sheet 24 on each spacing portion 5. The layout is performed according to the actual size of the spacing portion 5. One spacing portion 5 can be processed into one or more leg punching sheets 24.

[0062] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A processing technology for stator core of motorcycle magneto, It is characterized in that The invention comprises an iron core body (1) and a plurality of winding legs (2), wherein the cross-sectional shape of the iron core body (1) is an octagonal structure, each side of which is provided with a groove (3), the middle of the iron core body (1) is a central circular hole (4), and the winding legs (2) are T-shaped structures, including a front connecting section (21), a rear arc-shaped pole arc (22) and a middle winding section (23), the front connecting section (21) is placed in the groove (3) to form an interference fit, and the rear arc-shaped pole arc (22) is arranged in the groove (3) to form an interference fit. The outer end surface of the pole arc (22) is an arc surface, each winding leg (2) is symmetrically divided into two halves of the same shape, and the two halves are bonded and attached to each other to form a winding leg (2); the core body (1) is formed by stacking and riveting the main body punching sheets (11), and the shape of each main body punching sheet (11) is consistent with the cross-sectional shape of the core body (1); the winding leg (2) is divided into two halves, which are respectively stacked and riveted by leg punching sheets (24), and the two halves are stacked and riveted after stacking and riveting. The wire legs (2) are bonded and attached to each other to form a winding leg (2); the cross-sectional shape of the winding leg (2) is symmetrically divided into two halves of the same shape from the center line; the shape of each leg punching sheet (24) is consistent with the cross-sectional shape of the half of the winding leg (2); the groove (3) is a flat-bottomed groove (3); the two side walls (31) of the groove (3) are concave; the top surface (211) of the connecting section (21) of the winding leg (2) is flush with the flat-bottomed groove (3); and the side walls (31) of the winding leg (2) are concave. An arc-shaped outer protrusion (212) is formed to fit with the side wall (31) of the groove (3), and the height of the arc-shaped outer protrusion (212) does not exceed one third of the height of the arc-shaped pole arc (22), wherein the height of the arc-shaped outer protrusion (212) is: the dimension of the highest point of the arc-shaped outer protrusion (212) relative to the surface of the winding portion (23), and the height of the arc-shaped pole arc (22) is: the dimension from the most extended position (221) of the arc-shaped pole arc (22) to the surface of the winding portion (23); The processing technology includes the following steps: a. Select silicon steel sheets as the material for making the stator core, and use a stator punching die to punch out the main body punching sheet (11) according to the cross-sectional shape of the core main body (1), and use a stator punching die to punch out the leg punching sheet (24) according to the shape of the leg punching sheet (24); b. laminating the punched main body punching sheet (11) and the leg punching sheet (24) respectively, and placing the stacked main body punching sheet (11) and the leg punching sheet (24) respectively into the stacking and riveting positioning tooling, using a hydraulic press to rivet the main body punching sheet (11) to form the iron core body (1), and rivet the leg punching sheet (24) to form a half-width winding leg (2), and bonding the two half-width winding legs (2) to each other to form a winding leg (2); c. forming an interference fit between the connecting section (21) of the winding leg (2) and the groove (3) of the core body (1) to form an iron core; d. Place the fixed iron core in an oven for baking to evaporate the oil stains and water between the iron core body punching sheet (11) and the support leg punching sheet (24), thereby ensuring the firmness after the subsequent coating of the insulating material; e. Place the iron core in the coating positioning tooling and heat it in the heating ring; f. Place the heated iron core in a paint bucket filled with epoxy insulation powder, stir it repeatedly, and take it out after the thickness of the insulation layer attached to the iron core meets the requirements; g. Take out the iron core coated with the insulation layer from the coating positioning tooling, cool it, and then put it into an oven to bake until the insulation layer is cured; h. The solidified and cooled iron core is positioned with the center circular hole (4) as a reference, placed in a CNC lathe turning tool, and the outer diameter of the iron core is cut according to standard size requirements.

2. The processing technology of the stator core for a motorcycle magneto according to claim 1, It is characterized in that In the step d, the baking time in the oven is 1-2 hours at a temperature of 100-155° C.; in the step g, the baking time in the oven is 1-2 hours at a temperature of 160-180° C.

3. The processing technology of the stator core for a motorcycle magneto according to claim 1, It is characterized in that In the step a, a main body punch (11) and a leg punch (24) are punched out simultaneously on a silicon steel sheet material using a stator punch die, in the following manner: punching is performed in sequence along the length direction of the silicon steel sheet material in accordance with the shape of the main body punch (11) to form a plurality of parallel columns of main body punches (11) along the length direction of the silicon steel sheet material, two adjacent main body punches (11) in each column are spaced apart to form a spacing portion (5), and in the upper and lower directions of the spacing portion (5), there are a main body punch (11) in an upper and lower column respectively, and in the upper and lower directions of one of the main body punches (11), there is a spacing portion (5) in an upper and lower column respectively, forming a structure in which a plurality of columns are arranged in parallel as a whole, and in the same column, two adjacent main body punches (11) are spaced apart by a spacing portion (5), and the main body punches (11) in two adjacent columns are arranged in an alternating manner; at the same time, a stator punch die is provided to punch out at least one leg punch (24) on each spacing portion (5).

4. The processing technology of the stator core for a motorcycle magneto according to claim 1, It is characterized in that In the step a, the main body punching sheet (11) material is punched out on the silicon steel sheet material using a stator punching die in the following manner: the main body punching sheet (11) is punched in sequence along the length direction of the silicon steel sheet material in the shape of the main body punching sheet (11), so as to form a plurality of columns of main body punching sheets (11) which are parallel to each other along the length direction of the silicon steel sheet material, and the main body punching sheets (11) of two adjacent columns are arranged alternately, wherein the center point of the central circular hole (4) of each main body punching sheet (11), the center point of the central circular holes (4) of two adjacent main body punching sheets (11) in an adjacent column, and the center points of the central circular holes (4) of the three main body punching sheets (11) are collectively the three vertices of an equilateral triangle.

5. The processing technology of the stator core for a motorcycle magneto according to claim 1, It is characterized in that In the step a, the method of punching out the support leg punching sheet (24) material on the silicon steel sheet material using a stator punching die is as follows: punching in sequence along the length direction of the silicon steel sheet material according to the shape of the support leg punching sheet (24) to form a structure of multiple rows of support leg punching sheets (24) arranged in parallel along the length direction of the silicon steel sheet material, and the uppermost end and the lowermost end of each row of support leg punching sheets (24) respectively form a straight line, which is consistent with the length direction of the silicon steel sheet material.

6. The processing technology of the stator core for a motorcycle magneto according to claim 5, It is characterized in that The length direction of each support leg punching sheet (24) is consistent with the length direction of the silicon steel sheet material, and two adjacent support leg punching sheets (24) in each row are spaced apart, and a portion of the arc-shaped pole arc (22) of one of the support leg punching sheets (24) in the lower row is located at the position where the two support leg punching sheets (24) in the upper row are spaced apart.

7. The processing technology of the stator core for a motorcycle magneto according to claim 5, It is characterized in that The length direction of each leg punching sheet (24) forms an acute angle with the length direction of the silicon steel sheet material, and the leg punching sheets (24) in each row are in the same direction, and the length directions of two adjacent leg punching sheets (24) are arranged in parallel, and a part of one leg punching sheet (24) is placed in a vacant position (6) where the arc-shaped pole arc (22) of the adjacent leg punching sheet (24) intersects with the winding portion (23).

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