Multifunctional stator pressing ring and welding auxiliary tool and method thereof

Abstract

The application discloses a multifunctional stator pressing ring and a welding auxiliary tool and method thereof, which comprises a stator core formed by stacking a plurality of stator punching sheets, tooth pressing sheets arranged at both ends of the stator core to tightly press the plurality of stacked stator punching sheets, a plurality of fixing ribs surrounding the outer wall of the stator core to cooperate with the tooth pressing sheets to ensure the integrity of the stator core, a driving end stator pressing ring and a non-driving end stator pressing ring arranged at both ends of the stator core and welded to the tooth pressing sheets and the fixing ribs to cooperate with the tooth pressing sheets to fix and press the stacked stator punching sheets. The outer wall of the stator pressing ring is provided with three positioning grooves, so that the coaxial fixing of the driving end stator pressing ring and the non-driving end stator pressing ring at both ends can be realized by the positioning grooves when the plurality of stator punching sheets are stacked and installed, so that the stacked stator punching sheets can be fixed and installed in the coaxial line, and the driving end stator pressing ring and the non-driving end stator pressing ring are used for tightly fixing the stacked stator punching sheets.

Description

Technical Field

[0001] This invention relates to the field of generator application technology, and in particular to a multifunctional stator pressure ring and its welding auxiliary tooling and method. Background Technology

[0002] The stator clamping ring is an important component in an electric motor, primarily used to secure the stator core and windings, preventing loosening and displacement during motor operation. Traditional stator clamping rings have a relatively simple function, typically only providing fixation, and are insufficient in terms of positioning accuracy and heat dissipation performance.

[0003] In terms of positioning, traditional pressure rings rely heavily on the tightening force of bolts to ensure proper positioning of the stator core, which can easily lead to inaccurate positioning, affecting the assembly accuracy and operational stability of the motor. Regarding heat dissipation, motors generate a large amount of heat during operation, and the traditional pressure ring design is not conducive to heat dissipation, causing the internal temperature of the motor to rise, affecting its service life and performance. Furthermore, assembling the stator pressure ring increases the labor intensity and cost.

[0004] Therefore, this invention proposes a multifunctional stator pressure ring and its welding auxiliary tooling and method. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a multifunctional stator pressure ring and its welding auxiliary tooling and method, which aims to solve the problems of low positioning accuracy, poor heat dissipation performance, single function and cumbersome assembly of traditional stator pressure rings.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is to provide a multifunctional stator pressure ring, comprising a stator core composed of multiple stator laminations stacked together; Toothed pressure plates are set at both ends of the stator core to tightly press multiple stacked stator laminations together; Multiple fixing ribs surrounding the outer wall of the stator core are used in conjunction with the toothed clamping plates to ensure the integrity of the stator core; The drive end stator pressure ring and the non-drive end stator pressure ring are located at both ends of the stator core and welded to the toothed pressure plate and the fixing rib, so as to cooperate with the toothed pressure plate to fix and press the stacked stator laminations.

[0007] The present invention is further configured such that: the inner wall of the stator lamination is provided with a plurality of winding slots, and the stator lamination is provided with a plurality of lamination air holes in the circumferential direction near the outer wall.

[0008] The above technical solution facilitates the winding of wires using winding slots, while the use of multiple lamination vents facilitates the dissipation of internal heat during use, thereby improving service life.

[0009] The present invention is further configured such that: the inner wall of the toothed pressure plate is uniformly provided with a plurality of slots in the circumferential direction, and an adaptation slot is provided between adjacent slots; the plurality of slots are staggered with the plurality of winding slots; the toothed pressure plate is uniformly provided with a plurality of pressure plate air holes in the circumferential direction near the outer wall position, and the plurality of pressure plate air holes are respectively provided in correspondence with the plurality of punching air holes.

[0010] The above technical solution can avoid interference with the winding in the winding slot, and the adaptation slot between adjacent slots can provide a certain buffer space for the winding to prevent the winding from being directly and rigidly contacted with the tooth pressure plate and causing damage. The multiple pressure plate air holes near the outer wall are set to correspond to the pressure plate air holes of the stator laminations, which can form a through airflow channel with the ventilation ports of the stator pressure rings on the drive end and non-drive end, ensuring the heat dissipation effect during stator operation. The overall structural design, together with the fixing ribs and stator pressure rings, further enhances the pressing and fixing effect on the stacked stator laminations, ensuring the integrity and stability of the stator core.

[0011] The present invention is further configured such that: all of the plurality of fixing ribs are U-shaped, and they are respectively engaged with the connecting grooves opened on the outer wall of the toothed pressure plate at both ends by means of end face bending.

[0012] The above technical solution facilitates the fixing of multiple fixing ribs, while the fixing ribs enhance the strength of the entire stator core, improve its service life, and also facilitate the connection and fixing with the toothed plates at both ends.

[0013] The present invention is further configured such that: a plurality of ventilation openings A are uniformly opened in the circumferential direction of the stator pressure ring at the driving end; and three positioning grooves A and a plurality of tooth blocks are opened in the circumferential direction of the outer wall of the stator pressure ring at the driving end. The ventilation openings A are respectively connected to the tablet pressing air holes, and the inner diameter of the ventilation openings A is larger than the inner diameter of the tablet pressing air holes.

[0014] The above technical solution ensures that the cooling airflow can smoothly enter from the vent A, form a through heat dissipation channel through the pressing air hole and the punching air hole, and reduces airflow resistance and improves heat dissipation efficiency by the difference in inner diameter. The three positioning grooves A on its outer wall correspond to the positioning groove B of the non-drive end stator pressure ring, achieving precise positioning at both ends of the stator and ensuring the coaxiality of the overall structure. Multiple tooth blocks can enhance the connection or transmission stability between the pressure ring and external components, jointly ensuring the fixing effect and operating performance of the stator laminations after stacking.

[0015] The present invention is further configured such that: a plurality of ventilation openings B are uniformly opened in the circumferential direction of the non-driving end stator pressure ring; three positioning grooves B and a protrusion are opened in the circumferential direction of the outer wall of the non-driving end stator pressure ring; the positioning grooves B and the protrusion are arranged alternately; and the three positioning grooves B are respectively arranged in correspondence with the three positioning grooves A.

[0016] The above technical solution facilitates the formation of a continuous heat dissipation channel, ensuring that the heat generated during stator operation is effectively dissipated through airflow. The three positioning grooves B on its outer wall correspond one-to-one with the three positioning grooves A on the stator pressure ring at the drive end. Together with the alternating protrusions, the three-point positioning ensures the coaxiality and circumferential position accuracy of the pressure rings at both ends and the entire stator core. The protrusions also fill the gaps to enhance the structural rigidity, thus achieving stable fixation and efficient heat dissipation after the stator laminations are stacked.

[0017] A multifunctional stator ring welding auxiliary tooling is provided, including a base plate, to ensure the stability of the stator ring during welding; A rotating mechanism to perform a rotary welding operation on the inserted stator pressure ring; The extrusion mechanism is used to extrude and fix the stator pressure ring.

[0018] The present invention is further configured such that: the rotating mechanism includes a rotary motor bolted to the substrate, a drive gear fixedly connected to the drive end of the rotary motor, a driven gear meshing with the outer wall of the drive gear, the driven gear passing through the substrate via a connecting shaft and fixedly connected to a turntable, and multiple positioning rods uniformly fixedly connected to the top circumference of the turntable, the multiple positioning rods passing through vent B, vent A, pressing air hole and stamping air hole to fix the stator pressure ring.

[0019] Using the above technical solution, the rotary motor is started, and its output shaft drives the drive gear on the end face to rotate, thereby driving the meshing driven gear to rotate. This causes the top turntable to drive the entire stator core to rotate through multiple positioning rods, thus realizing the welding operation on it.

[0020] The present invention is further configured such that: the extrusion mechanism includes a mounting plate bolted to the rear wall of the substrate, an extrusion cylinder is bolted to the top of the mounting plate, a pressure frame is rotatably connected to the end face of the drive rod of the extrusion cylinder, and the pressure frame is coaxially arranged with the turntable, while the bottom of the pressure frame presses against the top of the stator pressure ring at the drive end.

[0021] With the above technical solution, the extrusion cylinder is activated, and its drive rod drives the end face pressure frame to move downward, so that the pressure frame presses and fixes the drive end stator pressure ring, so that the internal drive end stator pressure ring and non-drive end stator pressure ring carry the corresponding toothed pressure plates to fix and press multiple stator laminations.

[0022] On the other hand, a method for operating a multifunctional stator ring welding auxiliary tooling is provided, characterized by the following steps; S1. First, the non-driving end stator pressure ring, tooth pressure plate, stator lamination, tooth pressure plate and driving end stator pressure ring are sequentially connected to multiple positioning rods through their internal ventilation ports B, pressure plate air holes, lamination air holes, pressure plate air holes and ventilation ports A. S2. Next, start the extrusion cylinder. Its drive rod drives the end face pressure frame to move downward, so that the pressure frame presses and fixes the drive end stator pressure ring, so that the internal drive end stator pressure ring and non-drive end stator pressure ring carry the corresponding toothed pressure plate to fix and press multiple stator laminations. S3. Next, the stator pressure rings at the drive end and the stator pressure rings at the non-drive end are welded and fixed to their corresponding toothed plates and fixing ribs using external welding equipment. At the same time, the rotary motor is started, and its output shaft drives the drive gear on the end face to rotate, thereby driving the meshing driven gear to rotate. This causes the top turntable to drive the entire stator core to rotate through multiple positioning rods, thus realizing the welding operation.

[0023] The beneficial effects of this invention are as follows: 1. The present invention proposes a multifunctional stator pressure ring and its welding auxiliary tooling and method. By providing three positioning grooves on the outer wall of the stator pressure ring, when multiple stator laminations are stacked and installed, the positioning grooves can be used to fix the driving end stator pressure ring and the non-driving end stator pressure ring at both ends coaxially, so that the stacked stator laminations can maintain coaxial installation and fixation, and the driving end stator pressure ring and the non-driving end stator pressure ring can be used to press and fix them. 2. The multifunctional stator pressure ring and its welding auxiliary tooling and method proposed in this invention improve the heat dissipation efficiency of the generator during use by providing ventilation channels in the stator lamination and the stator pressure rings at both drive ends and the non-drive ends, and making the ventilation volume of the stator pressure rings at the drive ends greater than that of the stator pressure rings at the non-drive ends. 3. The multifunctional stator pressure ring and its welding auxiliary tooling and method proposed in this invention fix the position of the assembled stator core and, in coordination with the rotating mechanism, enable it to rotate, thereby achieving rapid welding and fixing of the internal drive end stator pressure ring and non-drive end stator pressure ring to the corresponding tooth pressure plate. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the stator pressure ring in this invention; Figure 2 This is a diagram showing the superimposed structure of the stator laminations in this invention; Figure 3 This is a structural diagram of the toothed pressure plate in this invention; Figure 4This is a diagram showing the connection structure between the fixing rib and the toothed pressure plate in this invention; Figure 5 This is a structural diagram of the stator pressure ring at the drive end in this invention; Figure 6 This is the structure of the non-driving end stator pressure ring in this invention; Figure 7 This is a first structural diagram of the welding auxiliary tooling in this invention; Figure 8 This is a second structural diagram of the welding auxiliary tooling in this invention; Figure 9 This is a structural diagram of the rotating mechanism in this invention; Figure 10 This is a structural diagram of the extrusion mechanism in this invention.

[0025] In the diagram: 1. Stator lamination; 11. Winding slot; 12. Lamination vent; 2. Toothed tablet; 21. Grooving; 22. Adaptation groove; 23. Tableting air hole; 24. Connecting groove; 3. Fixing reinforcement bars; 4. Stator pressure ring at the drive end; 41. Ventilation port A; 42. Positioning groove A; 43. Tooth block; 5. Stator pressure ring on non-drive end; 51. Ventilation port B; 52. Positioning groove B; 53. Protrusion; 6. Substrate; 7. Rotating mechanism; 71. Rotary motor; 72. Driving gear; 73. Driven gear; 74. Turntable; 75. Positioning rod; 8. Extrusion mechanism; 81. Mounting plate; 82. Extrusion cylinder; 83. Press frame. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0027] like Figure 1 and Figure 2 As shown, a multifunctional stator pressure ring includes a stator core composed of multiple stator laminations 1 stacked together. The inner wall of the stator laminations 1 is provided with multiple winding slots 11, and the stator laminations 1 are provided with multiple lamination vents 12 in the circumferential direction near the outer wall. This facilitates the winding of wires using the winding slots 11, and at the same time, the multiple lamination vents 12 facilitate the discharge of internal heat during use, thereby improving service life.

[0028] like Figure 1 and Figure 3As shown, toothed pressure plates 2 are set at both ends of the stator core to tightly press multiple stacked stator laminations 1. Multiple slots 21 are evenly opened in the circumferential direction on the inner wall of the toothed pressure plate 2, and an adaptation slot 22 is opened between adjacent slots 21. The multiple slots 21 are staggered with the multiple winding slots 11 to avoid interference with the windings in the winding slots 11. At the same time, the adaptation slots 22 between adjacent slots 21 can provide a certain buffer space for the windings to prevent the windings from being damaged by direct rigid contact with the toothed pressure plate 2. The toothed pressure plate 2 has multiple pressure plate air holes 23 evenly opened in the circumferential direction near the outer wall, and the multiple pressure plate air holes 23 are respectively arranged in correspondence with multiple stamping air holes 12. They can form a through airflow channel with the ventilation openings of the stator pressure ring 4 at the drive end and the stator pressure ring 5 at the non-drive end, ensuring the heat dissipation effect when the stator is running. The overall structural design, together with the fixing rib and stator pressure ring, further enhances the pressing and fixing effect on the stacked stator stampings, ensuring the integrity and stability of the stator core. like Figure 3 and Figure 4 As shown, multiple fixing ribs 3 surrounding the outer wall of the stator core are used to cooperate with the toothed pressure plate 2 to ensure the integrity of the stator core. The multiple fixing ribs 3 are all U-shaped, and they are respectively connected to the connecting grooves 24 opened on the outer wall of the toothed pressure plate 2 at both ends by bending the end face. This makes it easy to fix the position of the multiple fixing ribs 3. At the same time, the setting of fixing ribs 3 can enhance the strength of the entire stator core, improve its service life, and also facilitate the connection and fixation with the toothed pressure plate 2 at both ends.

[0029] like Figure 1 , Figure 5 and Figure 6 As shown, the drive end stator pressure ring 4 and the non-drive end stator pressure ring 5 are located at both ends of the stator core and welded to the toothed pressure plate 2 and the fixing rib 3, so as to cooperate with the toothed pressure plate 2 to fix and press the stacked stator lamination 1. The drive end stator pressure ring 4 has multiple ventilation holes A41 evenly opened in the circumferential direction. The multiple ventilation holes A41 are respectively connected to multiple pressure plate air holes 23. The inner diameter of the ventilation hole A41 is larger than the inner diameter of the pressure plate air hole 23. This ensures that the cooling airflow can smoothly enter from the ventilation hole A41, form a through heat dissipation channel through the pressure plate air hole 23 and the lamination air hole 12, and reduce the airflow resistance and improve the heat dissipation efficiency through the difference in inner diameter.

[0030] like Figure 1 and Figure 5As shown, the outer wall of the stator pressure ring 4 at the drive end is provided with three positioning grooves A42 and multiple tooth blocks 43 in the circumferential direction. The three positioning grooves A42 on its outer wall correspond to and cooperate with the positioning grooves B52 of the stator pressure ring 5 at the non-drive end, so as to achieve precise positioning at both ends of the stator and ensure the coaxiality of the overall structure. The multiple tooth blocks 43 can enhance the connection or transmission stability between the pressure ring and external components, and together ensure the fixing effect and running performance of the stator laminations 1 after stacking.

[0031] like Figure 1 and Figure 6 As shown, the non-drive end stator pressure ring 5 has multiple ventilation openings B51 evenly distributed in the circumferential direction to facilitate the formation of a through heat dissipation channel, ensuring that the heat generated during stator operation is effectively dissipated through airflow. The outer wall of the non-drive end stator pressure ring 5 has three positioning grooves B52 and protrusions 53 distributed alternately in the circumferential direction. At the same time, the three positioning grooves B52 correspond to the three positioning grooves A42 respectively. The three positioning grooves B52 on its outer wall correspond one-to-one with the three positioning grooves A42 of the drive end stator pressure ring 4. With the alternating protrusions 53, the coaxiality and circumferential position accuracy of the two end pressure rings and the entire stator core are ensured by three-point positioning. The protrusions 53 fill the gaps and enhance the structural rigidity, thus achieving stable fixation and efficient heat dissipation after the stator laminations 1 are stacked.

[0032] like Figure 7 As shown in Figure 9, a multifunctional stator ring welding auxiliary tooling includes a base plate 6 to ensure the stability of the stator ring during welding, and a rotating mechanism 7 to perform a rotational welding operation on the placed stator ring. The rotating mechanism 7 includes a rotary motor 71 bolted to the base plate 6. A drive gear 72 is fixedly connected to the drive end of the rotary motor 71. A driven gear 73 is meshed with the outer wall of the drive gear 72. The driven gear 73 passes through the base plate 6 through a connecting shaft and is fixedly connected to a turntable 74. Multiple positioning rods 75 are evenly fixedly connected to the top circumference of the turntable 74. The multiple positioning rods 75 pass through the ventilation port B51, ventilation port A41, pressing air hole 23, and punching air hole 12 to fix the stator ring. When the rotary motor 71 is started, its output shaft drives the drive gear 72 on the end face to rotate, thereby driving the meshed driven gear 73 to rotate, so that the top turntable 74 drives the entire stator core to rotate through the multiple positioning rods 75, realizing the welding operation.

[0033] like Figure 10As shown, the extrusion mechanism 8 is used to extrude and fix the stator ring. The extrusion mechanism 8 includes a mounting plate 81 bolted to the rear wall of the base plate 6. An extrusion cylinder 82 is bolted to the top of the mounting plate 81. A pressure frame 83 is rotatably connected to the end face of the drive rod of the extrusion cylinder 82. The pressure frame 83 is coaxially arranged with the turntable 74. At the same time, the bottom of the pressure frame 83 presses against the top of the drive end stator ring 4. When the extrusion cylinder 82 is activated, its drive rod drives the pressure frame 83 at the end face to move downward, so that the pressure frame 83 presses and fixes the drive end stator ring 4. This allows the internal drive end stator ring 4 and non-drive end stator ring 5 to carry the corresponding toothed pressure plates 2 to fix and press multiple stator laminations 1.

[0034] like Figures 7-10 As shown, a method for operating a multifunctional stator ring welding auxiliary tooling is characterized by the following steps; S1. First, the non-driving end stator pressure ring 5, tooth pressure plate 2, stator lamination 1, tooth pressure plate 2 and driving end stator pressure ring 4 are sequentially connected to multiple positioning rods 75 through their internal ventilation ports B51, pressure plate air holes 23, lamination air holes 12, pressure plate air holes 23 and ventilation ports A41. S2. Next, start the extrusion cylinder 82. Its drive rod drives the end face pressure frame 83 to move downward, so that the pressure frame 83 presses and fixes the drive end stator pressure ring 4, so that the internal drive end stator pressure ring 4 and non-drive end stator pressure ring 5 carry the corresponding toothed pressure plate 2 to fix and press the multiple stator laminations 1. S3. Next, the stator pressure ring 4 at the drive end and the stator pressure ring 5 at the non-drive end are welded and fixed to their corresponding tooth pressure plates 2 and fixing ribs 3 using external welding equipment. At the same time, the rotary motor 71 is started, and its output shaft drives the drive gear 72 at the end face to rotate, thereby driving the meshing driven gear 73 to rotate. This causes the top turntable 74 to drive the entire stator core to rotate through multiple positioning rods 75, thus realizing the welding operation.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A multifunctional stator pressure ring, characterized in that: Includes a stator core consisting of multiple stator laminations (1) stacked together; The inner wall of the stator lamination (1) is provided with multiple winding slots (11), and the stator lamination (1) is provided with multiple lamination air holes (12) in the circumferential direction near the outer wall. Toothed plates (2) are set at both ends of the stator core to tightly press the multiple stacked stator laminations (1); The inner wall of the toothed plate (2) is uniformly provided with multiple slots (21) in the circumferential direction, and an adaptation slot (22) is provided between adjacent slots (21). The multiple slots (21) are staggered from the multiple winding slots (11). The toothed plate (2) is uniformly provided with multiple plate air holes (23) in the circumferential direction near the outer wall, and the multiple plate air holes (23) are respectively provided in correspondence with the multiple punch air holes (12). Multiple fixing ribs (3) surrounding the outer wall of the stator core are used to cooperate with the toothed plate (2) to ensure the integrity of the stator core; The drive end stator pressure ring (4) and the non-drive end stator pressure ring (5) are located at both ends of the stator core and welded to the tooth pressure plate (2) and the fixing rib (3) to cooperate with the tooth pressure plate (2) to fix and press the stacked stator lamination (1).

2. The multifunctional stator pressure ring according to claim 1, characterized in that: The multiple fixing ribs (3) are U-shaped and are connected to the connecting grooves (24) on the outer wall of the toothed pressure plate (2) at both ends by bending the end face.

3. A multifunctional stator pressure ring according to claim 2, characterized in that: The stator pressure ring (4) at the drive end is provided with multiple ventilation openings A (41) evenly in the circumferential direction, and the outer wall of the stator pressure ring (4) at the drive end is provided with three positioning grooves A (42) and multiple tooth blocks (43) in the circumferential direction. Among them, the multiple ventilation openings A (41) are respectively connected to the multiple tablet air holes (23), and the inner diameter of the ventilation opening A (41) is larger than the inner diameter of the tablet air hole (23).

4. A multifunctional stator pressure ring according to claim 3, characterized in that: The non-driving end stator pressure ring (5) has multiple ventilation openings B (51) evenly opened in the circumferential direction. The outer wall of the non-driving end stator pressure ring (5) has three positioning grooves B (52) and protrusions (53) in the circumferential direction. The positioning grooves B (52) and protrusions (53) are arranged alternately. At the same time, the three positioning grooves B (52) are respectively arranged in correspondence with the three positioning grooves A (42).

5. A welding auxiliary tooling for a multifunctional stator pressure ring as described in any one of claims 1-4, characterized in that: Including the substrate (6) to ensure the stability of the stator pressure ring during welding; Rotating mechanism (7) to perform a rotary welding operation on the inserted stator pressure ring; The extrusion mechanism (8) is used to extrude and fix the stator pressure ring.

6. The welding auxiliary tooling for a multifunctional stator pressure ring according to claim 5, characterized in that: The rotating mechanism (7) includes a rotary motor (71) bolted to the base plate (6). The drive end of the rotary motor (71) is fixedly connected to a drive gear (72). The outer wall of the drive gear (72) is meshed with a driven gear (73). The driven gear (73) passes through the base plate (6) through a connecting shaft and is fixedly connected to a turntable (74). Multiple positioning rods (75) are evenly fixedly connected to the top circumference of the turntable (74). The multiple positioning rods (75) pass through the ventilation port B (51), ventilation port A (41), pressing air hole (23), and stamping air hole (12) to fix the stator pressure ring.

7. The welding auxiliary tooling for a multifunctional stator pressure ring according to claim 6, characterized in that: The extrusion mechanism (8) includes a mounting plate (81) bolted to the rear wall of the substrate (6). The top of the mounting plate (81) is bolted to an extrusion cylinder (82). The end face of the drive rod of the extrusion cylinder (82) is rotatably connected to a pressure frame (83). The pressure frame (83) and the turntable (74) are arranged coaxially. At the same time, the bottom of the pressure frame (83) is pressed against the top of the drive end stator pressure ring (4).

8. The operation method of the welding auxiliary tooling applied to a multifunctional stator pressure ring according to any one of claims 5-7, characterized in that: Includes the following steps; S1. First, the non-driving end stator pressure ring (5), tooth pressure plate (2), stator lamination (1), tooth pressure plate (2) and driving end stator pressure ring (4) are sequentially connected to multiple positioning rods (75) through their internal ventilation ports B (51), pressure plate air holes (23), lamination air holes (12), pressure plate air holes (23) and ventilation ports A (41); S2. Next, start the extrusion cylinder (82), whose drive rod drives the end face pressure frame (83) to move downward, so that the pressure frame (83) presses and fixes the drive end stator pressure ring (4), so that the internal drive end stator pressure ring (4) and non-drive end stator pressure ring (5) carry the corresponding tooth pressure plate (2) to fix and press multiple stator laminations (1); S3. Next, the stator pressure ring (4) at the drive end and the stator pressure ring (5) at the non-drive end are welded and fixed to their corresponding tooth pressure plates (2) and fixing ribs (3) using external welding equipment. At the same time, the rotary motor (71) is started, and its output shaft drives the drive gear (72) on the end face to rotate, thereby driving the meshing driven gear (73) to rotate, so that the turntable (74) at the top drives the entire stator core to rotate through multiple positioning rods (75), thus realizing the welding operation.

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