A coil shaping tool and a coil shaping method

Abstract

The application provides a coil shaping tool and a coil shaping method, and belongs to the field of coil shaping equipment.The coil shaping tool comprises a working groove, a bottom plate, a first pressing plate and a connecting piece.The working groove comprises a flattening part and a bending part, the width of the slot of the bending part is smaller than the width of the slot of the flattening part, the bottom plate is detachably connected in the flattening part or the bending part, the thickness of the bottom plate is smaller than the depth of the working groove, the width of the first pressing plate is smaller than the slot width of the bending part, the first pressing plate is detachably connected with the bottom plate through the connecting piece, and a containing cavity is formed between the bottom plate and the first pressing plate.The coil shaping tool provided by the application can meet the different shaping requirements of different parts of the coil, is used for shaping the coil with bending on both sides, and ensures the bending precision of the coil.

Description

Technical Field

[0001] This invention relates to the field of coil shaping equipment, specifically to a coil shaping fixture and a coil shaping method. Background Technology

[0002] The purpose of coil shaping is to increase coil density, i.e., slot fill factor, so that a motor of the same volume can provide greater thrust. In the field of rotating electrical machines, coil shaping is usually done manually by hammering. During the shaping process, the insulation layer of the coil enameled wire is damaged, affecting product quality.

[0003] Currently, there are mechanical shaping devices that can replace manual shaping to achieve automatic shaping of comparison coils. However, traditional coil shaping devices have complex structures. For example, patent CN111181326A discloses a coreless linear motor winding shaping machine, which includes a frame, a support platform, a separating mechanism, a main flat pressing mechanism, a secondary flat pressing mechanism, and a side bending mechanism. The support platform is located in the middle of the frame and includes a support plate and an embedded support plate. The separating mechanism includes a limiting guide post, a compression spring, a mounting plate, and a partition plate fixed to the mounting plate. The partition plate can extend upward through the support plate. The main flat pressing mechanism includes a transmission guide post, a main pressure plate, a first driving device, a vertical pressure plate, and a pin that can abut against the mounting plate. The secondary flat pressing mechanism includes a secondary pressure plate, a second driving device, and a pressure block. The side bending mechanism is located below the support plate and includes a vertical ejector plate corresponding to the outer side of the vertical pressure plate and a third driving device. It also includes a heating component for heating the hot adhesive of the coil. This patent can flatten the middle part of the shaping coil and bend the two ends. By setting a vertical ejector plate and a matching second through slot on the bottom plate that carries the coil, the two sides of the ejector coil are bent. However, a separate drive mechanism is required to drive the lateral ejector plate. The frame structure occupies a large space and has many drive mechanisms, making the overall structure complex. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a coil shaping fixture and coil shaping method, which can be used to process coils bent on both sides, with simple structure and convenient operation.

[0005] The present invention includes a coil shaping fixture, comprising a working groove, a base plate, a first pressure plate, and a connector;

[0006] The working groove includes a flattening section and a bending section, and the width of the groove opening of the bending section is smaller than the width of the groove opening of the flattening section.

[0007] The base plate can be detachably connected to the flattening or bending section, and the thickness of the base plate is less than the depth of the working groove;

[0008] The width of the first pressure plate is smaller than the width of the groove in the bending section, and it is detachably connected to the base plate through a connector, forming a receiving cavity between the base plate and the first pressure plate.

[0009] Furthermore, the base plate is wider at both ends and narrower in the middle. The width at both ends of the base plate is equal to the width of the groove in the flattened part, the width in the middle of the base plate is less than the width of the groove in the bending part, and the length in the middle of the base plate is equal to the length of the groove in the bending part.

[0010] Furthermore, the working groove is a rectangular groove.

[0011] Furthermore, the bending portion is formed by protruding into the groove from the inner sidewall of the flattened portion.

[0012] Furthermore, the base plate is provided with a base plate threaded hole, the first pressure plate is provided with a pressure plate threaded hole, and the connector connects the pressure plate threaded hole and the base plate threaded hole, so that the first pressure plate and the base plate are relatively fixed.

[0013] Furthermore, it also includes a second pressure plate, which is detachably connected to the upper part of the first pressure plate, and the width of the second pressure plate is equal to the width of the groove of the bending part.

[0014] Furthermore, the first pressure plate is provided with a first pressure plate connecting hole, and the second pressure plate is provided with a second pressure plate connecting hole. The second pressure plate connecting hole and the first pressure plate connecting hole are connected by screws or bolts to fix the second pressure plate relative to the first pressure plate.

[0015] Furthermore, it also includes a guide component, which includes a guide post and a guide sleeve that cooperates with the guide post. The guide post is vertically set on the base plate, and the guide sleeve is vertically set on the first pressure plate. The first pressure plate is connected to the base plate through the guide component.

[0016] Furthermore, it also includes a detachable positioning element disposed between the base plate and the coil.

[0017] A coil shaping method using the above-mentioned coil shaping fixture includes the following steps:

[0018] S1. Place the base plate in the flattening part, place the coil on the base plate, and place the first pressure plate on the coil;

[0019] S2. Pressure is applied to the first pressure plate by the pressure mechanism to flatten the coil;

[0020] S3. Connect the base plate and the first pressure plate with a connector to keep the coil flat and fix it between the base plate and the first pressure plate;

[0021] S4. After the pressure mechanism is disengaged, place the base plate, coil and first pressure plate together in the bending section;

[0022] S5. Pressure is applied to the first pressure plate through the pressure mechanism. The middle part of the coil moves towards the bottom of the groove along with the base plate and the first pressure plate. The two sides of the coil are bent by the groove wall of the bending part.

[0023] The beneficial effects of this invention are:

[0024] By providing working slots with various slot widths, and cooperating with fixtures such as a base plate and a first pressure plate: wider slots have a width greater than or equal to the coil width, allowing the coil to be completely placed in the working slot, and the coil is flattened between the base plate and the first pressure plate by a pressure mechanism; narrower slots have a width less than the coil width, and when pressure is applied by the pressure mechanism, the middle of the coil is pressed towards the bottom of the slot along with the base plate and the first pressure plate, while the two sides of the coil are bent by the slot walls on both sides. The coil shaping fixture of the present invention can meet the different shaping needs of different parts of the coil and is used for shaping coils bent on both sides.

[0025] The base plate and the first pressure plate have a stop structure. The width between the stops ensures the length of the coil after shaping. After flattening, the coil does not need to be removed from between the base plate and the first pressure plate. The coil is fixed between the base plate and the first pressure plate. The base plate, the coil and the first pressure plate are relatively fixed and can be taken out as a whole from the flattening part and placed into the bending part. The middle part of the coil is kept flat to avoid coil springback. At the same time, it avoids the coil moving relative to the base plate during the process from flattening to bending, which would cause inaccurate processing position. The cooperation between the working groove and the base plate ensures that the part of the coil that needs to be flattened and the part that needs to be bent accurately enter the corresponding shaping position, ensuring shaping accuracy.

[0026] In this invention, the movement direction of the pressure mechanism is consistent during flattening and bending, avoiding the use of a frame structure that is too large or has too many layers, reducing the number of drive mechanisms or pressure mechanisms, and simplifying the overall structure. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of the structure of the coil shaping fixture when placing the coil in one embodiment of the present invention;

[0028] Appendix Figure 2 This is a schematic diagram of the structure of the coil shaping fixture when flattening the coil in one embodiment of the present invention;

[0029] Appendix Figure 3 This is a schematic diagram of the structure of the coil shaping fixture after flattening the coil and installing the connector in one embodiment of the present invention;

[0030] Appendix Figure 4 This is a schematic diagram of the structure of the coil forming fixture bending a coil in one embodiment of the present invention;

[0031] Appendix Figure 5 This is a side view of a coil forming fixture bending a coil in one embodiment of the present invention;

[0032] Appendix Figure 6 This is an exploded view of a coil forming fixture bending a coil in one embodiment of the present invention;

[0033] Appendix Figure 7This is a schematic diagram of the structure of the base plate in one embodiment of the present invention;

[0034] Appendix Figure 8 This is a schematic diagram of the structure of the first pressure plate in one embodiment of the present invention.

[0035] Appendix Figure 9 This is a schematic diagram of the structure of the second pressure plate in one embodiment of the present invention.

[0036] Appendix Figure 10 This is a schematic diagram of the structure of the second pressure plate at another angle in one embodiment of the present invention.

[0037] In the diagram, 1-working groove; 11-flattening part; 12-bending part; 2-base plate; 21-needle tip receiving hole; 22-base plate guide hole; 23-base plate boss; 24-base plate threaded hole; 3-first pressure plate; 31-needle cap receiving hole; 32-pressure plate guide hole; 33-pressure plate boss; 34-pressure plate threaded hole; 35-first pressure plate connecting hole; 36-first pressure plate limiting platform; 4-connecting piece; 5-second pressure plate; 51-second pressure plate connecting hole; 52-second pressure plate limiting platform; 53-second pressure plate boss; 54-coil receiving hole; 6-guide piece; 61-guide post; 62-guide sleeve; 7-positioning piece; 8-coil; 9-pressure post. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0043] As attached Figure 1-6 As shown, an embodiment of the present invention provides a coil shaping device, including a working groove 1, a base plate 2, a first pressure plate 3 and a connector 4 disposed on a tooling.

[0044] It should be noted that, in the embodiments of the present invention, "width" refers to the dimension perpendicular to the two sides of the working groove 1, "thickness" or "height" refers to the dimension parallel to the two sides of the working groove 1 and perpendicular to the bottom of the groove, and "length" refers to the dimension in the same direction as the extension direction of the working groove 1.

[0045] In the embodiment of the present invention, when the coil shaping fixture is working, the coil 8 is shaped in the working groove 1. The working groove 1 includes a flattening part 11 and a bending part 12. The width of the groove opening of the bending part 12 is smaller than the width of the groove opening of the flattening part 11. Specifically, the width of the groove opening of the working groove 1 matches the width of the coil 8 to be shaped, the width of the groove opening of the flattening part 11 is greater than or equal to the width of the coil 8, and the width of the groove opening of the bending part 12 is smaller than the width of the coil 8.

[0046] The base plate 2 can be detachably connected to the flattening part 11 or the bending part 12. The thickness of the base plate 2 is less than the depth from the bottom of the working groove 1 to the opening of the groove. Specifically, the width of the base plate 2 is less than or equal to the width of the opening of the flattening part 11. When the flattening operation is performed, the base plate 2 is placed in the groove of the flattening part 11. At least a portion of the width of the base plate 2 is less than or equal to the width of the opening of the bending part 12. When the bending operation is performed, the base plate 2 is placed in the groove of the bending part 12.

[0047] The width of the first pressure plate 3 is smaller than the width of the groove of the bending part 12. The bottom plate 2 is connected to the first pressure plate 3, and a cavity is formed between the bottom plate 2 and the first pressure plate 3 for placing the coil 8. Before the pressure of flattening is removed, the bottom plate 2 and the first pressure plate 3 are detachably connected by the connector 4 to fix the coil 8 between the bottom plate 2 and the first pressure plate 3. The bottom plate 2, the coil 8 and the first pressure plate 3 can be taken out as a whole from the flattening part 11.

[0048] Preferably, as shown in the appendix Figure 3 , 7 As shown in Figure 8, in order to provide a receiving cavity for the coil 8 and better limit the coil 8, the base plate 2 has a base plate boss 23 on the side near the coil 8, and the first pressure plate 3 has a pressure plate boss 33 on the side near the coil 8. During installation, the base plate boss 23 and the pressure plate boss 33 are located opposite each other on both sides of the length of the coil 8 to prevent the coil 8 from moving to both sides when compressed, ensuring that the coil 8 is shaped according to the design requirements. It should be noted that two opposite base plate bosses 23 or two opposite pressure plate bosses 33 can also be provided on the base plate 2 or on the first pressure plate 3. In comparison, the base plate bosses 23 and the pressure plate bosses 33 are used together, and the base plate 2 only has a boss on one side for limiting the coil 8 when installing it, which is more convenient for placement.

[0049] In a preferred embodiment, as shown in the appendix Figure 3 , 7 As shown in Figure 8, a base plate threaded hole 24 is provided on the base plate 2, and a pressure plate threaded hole 34 is provided at the opposite position of the first pressure plate 3. The connecting piece 4 is a bolt or screw. After flattening, the base plate 2 and the first pressure plate 3 are connected through the connecting piece 4, so that the coil 8 is clamped between the base plate 2 and the first pressure plate 3, keeping the coil 8 in a flattened state to prevent springback. At the same time, the base plate 2, the coil 8 and the first pressure plate 3 are fixedly connected, making it easy to remove the whole unit for the next operation.

[0050] When the coil shaping fixture in this embodiment of the invention works in conjunction with the pressure column 9 of the pressure mechanism: the flattening operation is completed in the flattening part 11, the base plate 2 is located at the bottom of the groove of the flattening part 11, the coil 8 is located on the base plate 2, and the first pressure plate 3 is located on the coil 8. Because the width of the groove of the flattening part 11 is greater than or less than the width of the coil 8, the coil 8 can be completely inserted into the groove of the flattening part 11. When the pressure column 9 applies pressure on the first pressure plate 3, the coil 8 is flattened between the base plate 2 and the first pressure plate 3. Before the pressure is removed, the base plate 2 and the first pressure plate 3 are detachably connected by the connector 4, and the coil 8 is fixed between the base plate 2 and the first pressure plate 3 and kept flat. In the flat state, the base plate 2, coil 8, and first pressure plate 3 are fixed together as a whole fixture. After the pressure column 9 is separated from the first pressure plate 3, the whole fixture is taken out from the flattening part 11 and placed into the bending part 12. The base plate 2 contacts the bottom of the groove of the bending part 12. The bending operation is completed in the bending part 12. Because the width of the groove of the bending part 12 is smaller than the width of the coil 8, the two sides of the coil 8 are placed on the two side walls of the groove of the bending part 12. When the pressure mechanism applies pressure on the first pressure plate 3, the middle part of the coil 8 is pressed towards the bottom of the groove of the bending part 12 along with the base plate 2 and the first pressure plate 3. The two sides of the coil 8 are pressed against the two side walls of the groove and bend.

[0051] The coil forming fixture in this embodiment of the invention can meet two forming requirements of coils and is used to process coils bent on both sides, with wide application. The position of the coil 8 is fixed by the base plate 2, the first pressure plate 3 and the two side walls of the working groove 1 to ensure forming accuracy. After flattening, the coil 8 does not need to be removed from between the base plate 2 and the first pressure plate 3. After flattening, the middle part of the coil 8 is always fixed between the base plate 2 and the first pressure plate 3 to maintain the flattened state and prevent the coil 8 from springing back. At the same time, it prevents the coil 8 from moving relative to the base plate 2 during the process from flattening to bending, which would lead to inaccurate processing position. The cooperation between the working groove 1 and the base plate 2 ensures that the part of the coil 8 that needs to be flattened and the part that needs to be bent accurately enter the corresponding forming position, ensuring forming accuracy. In this embodiment of the invention, the movement direction of the pressure mechanism is consistent during flattening and bending, avoiding the use of a frame structure with too large volume and too many layers, reducing the number of drive mechanisms or pressure mechanisms, and simplifying the overall structure.

[0052] In a preferred embodiment, such as Figure 1-6As shown, the base plate 2 is wider at both ends and narrower in the middle, forming an "I" shape. The width at both ends of the base plate 2 is equal to the width of the groove in the flattening part 11, allowing the base plate 2 to be completely inserted into the groove of the flattening part 11. The width of the middle part of the base plate 2 is less than the width of the groove in the bending part 12, and the length of the middle part is equal to the extension length of the groove in the bending part 12. The dimensions of the middle part of the base plate 2 and the groove in the bending part 12 are matched, allowing the base plate 2 to be embedded in the groove of the bending part 12 and fixed in the bending processing position. At this time, the coil 8 is located in the narrower middle part of the base plate 2, and the two sides near the groove wall are in contact with the groove wall of the bending part 12. When the pressure column 9 applies pressure, this part is pressed against and bent. Preferably, according to the actual shaping needs, the length of the narrower middle part of the base plate 2 is also equal to the length of the coil 8, and the two sides of the coil 8 near the groove wall are all bent.

[0053] In a preferred embodiment, such as Figure 1 As shown, the cross-section of the working groove 1 perpendicular to the extension direction is rectangular. In this embodiment, the bottom of the working groove 1 is flat and the groove wall is perpendicular to the bottom, which can better fit the base plate 2 and coil 8 that are matched with the size of the working groove 1, so as to flatten and bend the coil 8.

[0054] In a preferred embodiment, such as Figure 1 As shown, the inner sidewall of the bending portion 12 protrudes into the groove to form a boss, making the width of the groove opening of the bending portion 12 smaller than the width of the groove opening of the flattening portion 11. The heights of the bosses on both sides of the bending portion 12 are equal. During bending, the two sides of the coil 8 that need to be bent are placed on the two side bosses respectively. It should be noted that, alternatively, the inner sidewall of one side of the bending portion 12 can protrude into the groove to form a boss, making the width of the groove opening of the bending portion 12 smaller than the width of the groove opening of the flattening portion 11, and the height of the boss is equal to the height of the other sidewall of the bending portion 12. The working groove 1 in this embodiment has a simple structure; different sizes of working grooves 1 are required according to the size requirements of the coil to be shaped. The working groove 1 in this embodiment is easy to process, which helps to improve production efficiency; multiple different groove sizes can also be processed on the same tooling, improving the adaptability of the working groove 1.

[0055] In a preferred embodiment, as shown in the appendix Figure 4-6 As shown, it also includes a second pressure plate 5, which is used to control the bending height of both sides of the coil 8. The width of the second pressure plate 5 is equal to the width of the groove of the bending part 12. During the bending operation, the second pressure plate 5 can be detached and connected to the first pressure plate 3. The pressure column 9 applies pressure on the second pressure plate 5. The middle part of the coil 8 is pressed towards the bottom of the groove along with the bottom plate 2, the first pressure plate 3 and the second pressure plate 5. After the two sides of the coil 8 are bent against the groove wall, the ends of the two sides of the coil 8 abut against the second pressure plate 5, controlling the bending height of both ends of the coil 8 within the design range, and maintaining the abutment state after the pressure is removed, thereby maintaining the bending state of the coil 8 and preventing springback.

[0056] In a preferred embodiment, as shown in the appendix Figure 9 and 10 As shown, the second pressure plate 5 is provided with a second pressure plate connecting hole 51, which is aligned with the first pressure plate connecting hole 35 when connected. After the bending operation is completed, bolts or screws are set in the first pressure plate connecting hole 35 and the second pressure plate connecting hole 51 to fix the relative positions of the first pressure plate 3 and the second pressure plate 5, thereby fixing the relative position of the second pressure plate 5 and the coil 8, maintaining the bent state of the coil 8, and preventing the coil 8 from springing back after the pressure is removed.

[0057] Preferably, as shown in the appendix Figure 9 and 10 As shown, the first pressure plate 3 and the second pressure plate 5 need to connect the pressure column 9. One side of the pressure column 9 is concave to the bottom of the groove, and the opposite side is convex to the bottom of the groove, forming the first pressure plate limiting platform 36 and the second pressure plate limiting platform 52 respectively. The inner wall size of the concave side and the outer wall size of the convex side match the size of the pressure column 9. On the one hand, this prevents the pressure column 9 from sliding relative to the tooling when applying pressure. On the other hand, by fitting the matching first pressure plate limiting platform 36 and the second pressure plate limiting platform 52, the mutual movement between components during the bending process is avoided, which causes processing errors and improves the forming accuracy. Furthermore, the first pressure plate limiting platform 36 is located at the center of the surface of the first pressure plate 3, and the second pressure plate limiting platform 52 is located at the center of the surface of the second pressure plate 5, so that the tooling is subjected to uniform force.

[0058] Preferably, as shown in the appendix Figure 5 , 9 As shown in Figure 10, the second pressure plate 5 has second pressure plate bosses 53 protruding towards the bottom of the groove on both sides. The distance between the inner walls of the second pressure plate bosses 53 on both sides is equal to the width of the first pressure plate 3. According to the design requirements of the bending height on both sides of the coil 8, the height of the second pressure plate bosses 53 is designed to control the bending height on both sides of the coil 8. At the same time, it can prevent the second pressure plate 5 and the first pressure plate 3 from moving relative to each other in the direction perpendicular to the groove wall, thus ensuring the shaping accuracy.

[0059] Preferably, as shown in the appendix Figure 9 and 10 As shown, the second pressure plate 5 is provided with a coil receiving hole 54 on the side near the wall of the working groove 1, which is used as the inlet or outlet of the coil 8 to avoid the inlet or outlet of the coil 8 affecting the quality of flattening or bending.

[0060] In a preferred embodiment, as shown in the appendix Figure 2 and 3As shown, in order to ensure that the base plate 2 and the first pressure plate 3 are correctly aligned, a guide member 6 is also included to connect the base plate 2 and the first pressure plate 3. The guide member 6 includes a guide post 61 and a guide sleeve 62 that cooperates with the guide post 61. Preferably, for ease of processing, the base plate 2 is provided with a base plate guide hole 22 in the thickness direction, and the guide post 61 is pre-installed with the base plate guide hole 22 with an interference fit. The first pressure plate 3 is provided with a pressure plate guide hole 32 in the thickness direction, and the guide sleeve 62 is pre-installed with the pressure plate guide hole 32 with an interference fit. The guide member 6 ensures that the base plate 2 and the first pressure plate 3 are correctly aligned and connected, thereby improving the forming accuracy.

[0061] In a preferred embodiment, as shown in the appendix Figure 1 As shown, it also includes a positioning component 7 that is detachably disposed between the base plate 2 and the coil, used to fix the position of the coil 8. When multiple coils are combined and shaped at the same time, the positioning component 7 fixes the relative position between the coils.

[0062] In a preferred embodiment, as shown in the appendix Figure 1 As shown, based on the structural characteristics of the coil, the positioning component 7 is a pin. The pin passes through the first pressure plate 3 and the coil 8 in sequence and is then inserted into the base plate 2 to fix the position of the coil 8.

[0063] In a preferred embodiment, as shown in the appendix Figure 7 and 8 As shown, the base plate 2 is also provided with a needle tip receiving hole 21, and the first pressure plate 3 is provided with a needle cap receiving hole 31 at a corresponding position. The needle cap receiving hole 31 is a through hole. Specifically, after the base plate 2, coil 8 and first pressure plate 3 are installed in sequence, the needle tip of the ejector pin passes through the needle cap receiving hole 31 and then through the gap between the coils and inserts into the needle tip receiving hole 21. The needle cap of the ejector pin remains in the needle cap receiving hole 31. Preferably, in order to control the insertion depth of the ejector pin, the size of the through hole at the end away from the coil 8 matches the size of the needle cap, and the size of the through hole at the end closer to the coil 8 is smaller than the size of the needle cap. Preferably, multiple ejector pins are provided according to the size and number of coils. Preferably, according to the design requirements of the coil, the diameter of the ejector pin is 1 mm.

[0064] As attached Figure 1-6 As shown, this embodiment of the invention provides a coil shaping method using the above-described coil shaping fixture, comprising the following steps:

[0065] S1. Install the base plate 2 with the guide post 61 pre-interference installed in the groove of the flattening part 11, place the coil 8 on the base plate 2, so that the guide sleeve 62 pre-interference installed on the first pressure plate 3 passes through the guide post 61, install the first pressure plate 3 on the coil 8, and insert the positioning piece 7 into the first pressure plate 3 to position the coil 8.

[0066] S2. Pressure is applied to the first pressure plate 3 by the pressure column 9 of the pressure mechanism, so that the coil 8 is flattened between the base plate 2 and the first pressure plate 3.

[0067] S3. Connect the base plate 2 and the first pressure plate 3 with the connector 4, so that the coil 8 is kept flat and fixed between the base plate 2 and the first pressure plate 3.

[0068] S4. The pressure column 9 is disengaged, and the base plate 2, coil 8 and first pressure plate 3 are placed into the bending part 12 as a whole.

[0069] S5. Pressure is applied to the first pressure plate 3 by the pressure column 9 of the pressure mechanism, so that the middle part of the coil moves towards the bottom of the groove along with the bottom plate 2 and the first pressure plate 3, and the two sides of the coil are bent by the bending part 12.

[0070] S5. The pressure column 9 is disengaged, and the second pressure plate 5 is fixedly installed on the first pressure plate 3;

[0071] S6. Pressure is applied to the second pressure plate 5 by the pressure column 9 of the pressure mechanism. The second pressure plate 5 abuts against the two bent ends of the coil 8 and applies pressure to adjust the bending height of the two sides of the coil 8.

[0072] S7. Use bolts or screws to connect the second pressure plate connecting hole 51 and the first pressure plate connecting hole 35 in sequence, fix the second pressure plate 5 on the first pressure plate 3, and keep the second pressure plate 5 in contact with the two bent ends of the coil 8 to prevent the bent coil 8 from springing back.

[0073] In the entire shaping process of this embodiment of the invention, the base plate 2, coil 8, first pressure plate 3, connector 4, second pressure plate 5, and bolts or screws for fixing the second pressure plate 5 are installed sequentially according to the operation steps. The installation sequence of the tooling parts is consistent with the coil shaping steps, so it is not necessary to disassemble the parts installed in the previous step when performing the next operation, avoiding unnecessary disassembly operations that affect shaping efficiency. The operation is simple and the shaping efficiency is high. After the coil 8 is flattened, the base plate 2 and the first pressure plate 3 are fixed relative to each other through the connector 4 to prevent the coil 8 in the middle from springing back and to keep it in a flat state. After the coil 8 is bent, the second pressure plate 5 is fixed on the first pressure plate 3 through bolts or screws. The second pressure plate 5 abuts against the two sides of the coil 8 that are bent to prevent the coil 8 from springing back at the bend and to keep it in a bent state. After the shaping is completed, the base plate 2, coil 8, first pressure plate 3 and second pressure plate 5 are fixed relative to each other and can be taken out and placed as a whole, which is conducive to keeping the coil 8 in the shaping state required by the design.

[0074] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A coil shaping method, characterized in that, The coil shaping fixture includes a working groove (1), a base plate (2), a first pressure plate (3), and a connector (4). The working groove (1) includes a flattening part (11) and a bending part (12), wherein the width of the groove opening of the bending part (12) is smaller than the width of the groove opening of the flattening part (11); The base plate (2) can be detachably connected to the flattening part (11) or the bending part (12), and the thickness of the base plate (2) is less than the depth of the working groove (1); The width of the first pressure plate (3) is smaller than the groove width of the bent part (12), and it is detachably connected to the bottom plate (2) through the connector (4). A receiving cavity is formed between the bottom plate (2) and the first pressure plate (3). The base plate (2) is wide at both ends and narrow in the middle. The width at both ends of the base plate (2) is equal to the width of the groove of the flattening part (11). The width in the middle of the base plate (2) is less than the width of the groove of the bending part (12). The length in the middle of the base plate (2) is equal to the length of the groove of the bending part (12). The base plate (2) is provided with a base plate threaded hole (24), and the first pressure plate (3) is provided with a pressure plate threaded hole (34). The connector (4) connects the pressure plate threaded hole (34) and the base plate threaded hole (24) so ​​that the first pressure plate (3) is relatively fixed to the base plate (2). It also includes a second pressure plate (5), which is detachably connected to the upper part of the first pressure plate (3). The width of the second pressure plate (5) is equal to the width of the groove of the bending part (12). The first pressure plate (3) is provided with a first pressure plate connecting hole (35), and the second pressure plate (5) is provided with a second pressure plate connecting hole (51). The second pressure plate connecting hole (51) and the first pressure plate connecting hole (35) are connected by screws or bolts, so that the second pressure plate (5) is fixed relative to the first pressure plate (3). The coil shaping method includes the following steps: S1. Place the base plate (2) in the flattening part (11), place the coil (8) on the base plate (2), and place the first pressure plate (3) on the coil (8). S2. Apply pressure to the first pressure plate (3) through a pressure mechanism to flatten the coil (8); S3. Connect the base plate (2) and the first pressure plate (3) with the connector (4) so ​​that the coil (8) is kept flat and fixed between the base plate (2) and the first pressure plate (3); S4. After the pressure mechanism is disengaged, the base plate (2), the coil (8) and the first pressure plate (3) are placed together in the bending part (12); S5. Pressure is applied to the first pressure plate (3) by the pressure mechanism. The middle part of the coil (8) moves towards the bottom of the groove along with the bottom plate (2) and the first pressure plate (3). The two sides of the coil (8) are bent by the groove wall of the bending part (12). S6. The pressure column (9) is disengaged, and the second pressure plate (5) is fixedly installed on the first pressure plate (3); S7. Pressure is applied to the second pressure plate (5) by the pressure column (9) of the pressure mechanism. The second pressure plate (5) abuts against the two bent ends of the coil (8) and applies pressure to adjust the bending height of the two sides of the coil (8). S8. Connect the second pressure plate connecting hole (51) and the first pressure plate connecting hole (35) in sequence with bolts or screws, fix the second pressure plate (5) on the first pressure plate (3), and keep the second pressure plate (5) in contact with the two bent ends of the coil (8) to prevent the bent coil (8) from springing back.

2. The coil shaping method as described in claim 1, characterized in that, The working groove (1) is a rectangular groove.

3. The coil shaping method as described in claim 1, characterized in that, The bending portion (12) is formed by protruding into the groove from the inner sidewall of the flattening portion (11).

4. The coil shaping method as described in claim 1, characterized in that, It also includes a guide (6), which includes a guide post (61) and a guide sleeve (62) that cooperates with the guide post (61). The guide post (61) is vertically arranged on the base plate (2), and the guide sleeve (62) is vertically arranged on the first pressure plate (3). The first pressure plate (3) is connected to the base plate (2) through the guide (6).

5. The coil shaping method as described in claim 1, characterized in that, It also includes a positioning element (7) that is detachably disposed between the base plate (2) and the coil (8).

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