A stator core annealing locking fixture

Abstract

This invention belongs to the technical field of annealing process tooling, specifically referring to a stator core annealing locking tooling, including a sliding guide assembly, a rotary locking assembly, a gravity self-locking adjustment assembly, an end pressing assembly, a frame-type end pressing assembly, and an end pressing locking assembly. The sliding guide assembly is disposed on the gravity self-locking adjustment assembly, and the rotary locking assembly is located within the sliding guide assembly. Through the structural cooperation of the sliding guide assembly and the rotary locking assembly, this invention can lock the position of the central lifting rod by a small amplitude of rotation when the central lifting rod and the sliding sleeve are at any relative height. Therefore, this device is applicable to stator core workpieces of different specifications and inner diameters.

Description

Technical Field

[0001] This invention belongs to the field of annealing process tooling technology, specifically referring to a stator core annealing locking tooling. Background Technology

[0002] The stator core is composed of several silicon steel sheets stacked together. The annealing process is mainly to eliminate the internal stress during the production and processing of the parts. Therefore, annealing can be performed on individual silicon steel sheets or on the entire core workpiece after stacking and assembly. Annealing is a relatively mature process, but when applied to parts such as stator cores, there are still some problems that need to be solved: First, in order to make full use of the longitudinal space inside the furnace, the workpiece needs to be mounted on a shaft-type fixture for annealing. When the workpiece is an independent silicon steel sheet, due to the large number of them, the installation and fixing of the workpiece is time-consuming and labor-intensive. Second: For iron core workpieces that have been stacked and assembled, longitudinal deformation such as cracking and warping at the joints may occur during the annealing process due to factors such as stress and temperature changes. Summary of the Invention

[0003] In view of the above situation and to overcome the shortcomings of the prior art, the present invention proposes an annealing locking fixture capable of adjusting and fixing several groups of silicon steel sheets at one time; this solution uses the fixture's own weight and the lifting force during hoisting as the driving force for adjustment and pre-fixing; it is simple to operate, highly efficient, and can be flexibly matched with manual or other automated mechanisms; Furthermore, this invention also proposes a sliding guide assembly and a rotating locking assembly. Through the structural cooperation of the sliding guide assembly and the rotating locking assembly, the position of the central lifting rod can be locked by a small-amplitude rotation when the central lifting rod and the sliding sleeve are at any relative height. This makes the device applicable to iron core workpieces of different specifications and inner diameters.

[0004] In addition, in order to longitudinally limit the iron core workpiece, the present invention also proposes an end extrusion assembly, a frame-type end pressing assembly, and an end pressing locking assembly, which complete the longitudinal limitation of the iron core workpiece by locking at both ends, so as to avoid longitudinal deformation or lamination separation of the iron core workpiece during temperature changes.

[0005] The technical solution adopted by this invention is as follows: This invention proposes a stator core annealing locking fixture, including a sliding guide assembly, a rotary locking assembly, a gravity self-locking adjustment assembly, an end pressing assembly, a frame-type end pressing assembly, and an end pressing locking assembly. The sliding guide assembly is disposed on the gravity self-locking adjustment assembly, and the rotary locking assembly is located in the sliding guide assembly. The rotary locking assembly can rotate and slide axially within the sliding guide assembly. The end pressing assembly is disposed on the frame-type end pressing assembly, the frame-type end pressing assembly is detachably disposed on the sliding guide assembly, and the end pressing locking assembly is disposed below the frame-type end pressing assembly; Furthermore, the sliding guide assembly includes a sliding sleeve and a sliding block. The inner wall of the sliding sleeve is provided with guide slides evenly distributed in a ring. The sliding block is provided with a longitudinal slide groove that matches the guide slide. The sliding block is slidably disposed in the sliding sleeve by engaging with the longitudinal slide groove.

[0006] The sliding block can slide longitudinally along the sliding sleeve, thereby preventing the rotation locking component from locking during the adjustment of the fixed iron core workpiece by the gravity self-locking adjustment component.

[0007] Furthermore, the rotary locking assembly includes a central lifting rod, and the sliding guide assembly also includes a horizontal rotating ring, which is fixedly connected to the central lifting rod. The sliding block is also provided with an annular groove, and the sliding block is rotatably mounted on the horizontal rotating ring through the annular groove.

[0008] Through the structural cooperation of the sliding guide assembly and the rotary locking assembly, the position of the central hanger can be locked by a small amount of rotation when the central hanger and the sliding sleeve are at any relative height. This makes the device applicable to iron core workpieces of different specifications and inner diameters.

[0009] Preferably, the rotary locking assembly further includes a tapered threaded platform and a locking slider. The tapered threaded platform is fixed to the central lifting rod. The longitudinal slide groove is symmetrically provided with inclined slide grooves on both sides. The locking slider is symmetrically provided with guide slide shafts on both sides. The guide slide shafts are engaged and slidably disposed in the inclined slide grooves. Preferably, the inner wall of the locking slider is provided with threads, the outer wall of the tapered threaded platform is provided with threads, and the locking slider and the tapered threaded platform are connected by threads. As a further preferred embodiment of the present invention, the end faces of the guide slide and the locking slider are provided with mutually cooperating toothed grooves, so that the two cannot slide longitudinally after being engaged.

[0010] By rotating the central hanger and the sliding sleeve relative to each other, the tapered threaded platform and the locking slider can be rotated relative to each other, thereby changing the extension of the locking slider to complete the contact and engagement with the sliding sleeve. The self-locking property of the thread is used to prevent the central hanger from springing back and automatically unlocking after the rotational torque is removed.

[0011] Furthermore, the gravity self-locking adjustment component includes an expansion shell and a trapezoidal slider. The sliding sleeve is fixedly connected to the top of the expansion shell. Sliding windows are evenly distributed in a ring on the expansion shell, and the trapezoidal slider is engaged and slidably disposed in the sliding windows.

[0012] During the upward lifting of the central lifting rod, the weight of the sliding guide assembly and the gravity self-locking adjustment assembly will cause the truncated cone and the trapezoidal slider to have a tendency to move relative to each other, thereby pushing the trapezoidal slider to slide and expand outward synchronously, and thus adjusting the iron core workpiece to a position coaxial with the central lifting rod.

[0013] Preferably, the bottom of the central lifting rod is provided with a cone, and the trapezoidal slider and the cone are in sliding contact. When the trapezoidal slider extends synchronously, it can abut against the interior of the iron core workpiece and adjust the center position of the iron core workpiece.

[0014] Furthermore, the end extrusion assembly includes an upper fixing ring, an upper locking nut, and a lower fixing ring. The upper fixing ring and the lower fixing ring are located at both ends of the iron core workpiece, respectively. An extension screw is provided on the upper fixing ring, and the upper locking nut and the extension screw are connected by a threaded drive. A sliding table is provided on the lower fixing ring.

[0015] Furthermore, the frame-type end-pressing assembly includes a crossbeam and a combination pin. The crossbeam is provided with a middle ring, the sliding sleeve is located in the middle ring, the middle ring is provided with a through pin hole portion two, the sliding sleeve is provided with a pin hole portion one, and the combination pin is provided in the pin hole portion two and the pin hole portion one.

[0016] Preferably, the frame-type end-pressing assembly further includes a longitudinal beam and a shoulder lifting ring, the longitudinal beam and the cross beam are connected by the shoulder lifting ring, the side of the longitudinal beam is provided with an adjustment groove, and the extension screw and the sliding table are both provided in the adjustment groove.

[0017] By using end-pressing components and frame-type end-pressing components, pressure can be applied to both ends of the core workpiece to prevent longitudinal deformation or lamination separation of the core workpiece during temperature changes.

[0018] Furthermore, the end-pressure locking assembly includes a set screw and a lock nut, with threaded drive between the set screw and the longitudinal beam, and the lock nut is located on the set screw.

[0019] Preferably, the top of the central lifting rod is provided with a central lifting ring, and the gravity self-locking adjustment assembly further includes a mounting column, which is located at the bottom of the expansion shell and has mounting pin holes.

[0020] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The sliding block can slide along the longitudinal direction of the sliding sleeve, thereby preventing the rotation locking component from locking during the process of adjusting the fixed iron core workpiece by the gravity self-locking adjustment component.

[0021] (2) Through the structural cooperation of the sliding guide assembly and the rotating locking assembly, the position of the central hanger can be locked by a small rotation when the central hanger and the sliding sleeve are at any relative height, so that the device can be applied to iron core workpieces of different specifications and inner diameters.

[0022] (3) By rotating the central hanger and the sliding sleeve relative to each other, the tapered threaded platform and the locking slider can rotate relative to each other, thereby changing the extension of the locking slider to complete the contact and engagement with the sliding sleeve, and using the self-locking characteristic of the thread to avoid the rebound of the central hanger and automatic unlocking after the rotation torque is removed.

[0023] (4) During the upward lifting of the central lifting rod, the weight of the sliding guide assembly and the gravity self-locking adjustment assembly will cause the cone and the trapezoidal slider to have a tendency to move relative to each other, thereby pushing the trapezoidal slider to slide outward synchronously and thus adjusting the iron core workpiece to a position coaxial with the central lifting rod.

[0024] (5) By using the end extrusion assembly and the frame end pressing assembly, pressure can be applied to both ends of the iron core workpiece to prevent longitudinal deformation or lamination separation of the iron core workpiece during temperature changes. Attached Figure Description

[0025] Figure 1 This is a perspective view of a stator core annealing and locking fixture proposed in this invention; Figure 2 This is a front view of a stator core annealing and locking fixture proposed in this invention; Figure 3 This is a left view of a stator core annealing and locking fixture proposed in this invention; Figure 4 for Figure 3 A cross-sectional view along section line AA; Figure 5 for Figure 4 A cross-sectional view along the cutting line BB; Figure 6 This is an exploded structural diagram of a stator core annealing and locking fixture proposed in this invention. Figure 7 for Figure 4 A magnified view of a section at point I; Figure 8 for Figure 5 Enlarged view of a section at point II; Figure 9 for Figure 6 Enlarged view of a section at point III; Figure 10 for Figure 4 A magnified view of a section at point IV.

[0026] Among them, 1. Sliding guide assembly, 2. Rotary locking assembly, 3. Gravity self-locking adjustment assembly, 4. End pressing assembly, 5. Frame-type end pressing assembly, 6. End pressing locking assembly, 7. Iron core workpiece, 11. Sliding sleeve, 12. Sliding block, 13. Horizontal rotating ring, 21. Central lifting rod, 22. Tapered threaded platform, 23. Locking slider, 31. Expansion shell, 32. Trapezoidal slider, 33. Mounting column, 41. Upper fixing ring, 42. Upper locking nut, 43. Lower fixing ring, 51. Horizontal 52. Beam, 53. Combination pin, 54. Longitudinal beam, 65. Shoulder eye, 66. Set screw, 67. Anti-loosening nut, 111. Guide slide, 112. Pin hole part one, 121. Longitudinal slide groove, 122. Inclined slide groove, 123. Annular slide groove, 211. Center eye, 212. Conical frustum, 231. Guide slide shaft, 311. Sliding window, 331. Mounting pin hole, 411. Extension screw, 431. Sliding table, 511. Middle ring, 512. Pin hole part two, 531. Adjustment groove.

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] like Figures 1-10 As shown, this invention proposes a stator core annealing locking fixture, comprising a sliding guide assembly 1, a rotary locking assembly 2, a gravity self-locking adjustment assembly 3, an end pressing assembly 4, a frame-type end pressing assembly 5, and an end pressing locking assembly 6. The sliding guide assembly 1 is disposed on the gravity self-locking adjustment assembly 3, and the rotary locking assembly 2 is located in the sliding guide assembly 1. The rotary locking assembly 2 is capable of rotating and axially sliding within the sliding guide assembly 1. The end pressing component 4 is mounted on the frame-type end pressing component 5, the frame-type end pressing component 5 is detachably mounted on the sliding guide component 1, and the end pressing locking component 6 is mounted below the frame-type end pressing component 5. The sliding guide assembly 1 includes a sliding sleeve 11 and a sliding block 12. The inner wall of the sliding sleeve 11 is provided with guide slides 111 evenly distributed in a ring. The sliding block 12 is provided with a longitudinal slide groove 121 that matches the guide slide 111. The sliding block 12 is engaged and slidably disposed in the sliding sleeve 11 through the longitudinal slide groove 121.

[0031] The sliding block 12 can slide longitudinally along the sliding sleeve 11, thereby preventing the rotation locking component 2 from locking during the adjustment of the fixed iron core workpiece 7 by the gravity self-locking adjustment component 3.

[0032] The rotating locking assembly 2 includes a central lifting rod 21, and the sliding guide assembly 1 also includes a horizontal rotating ring 13, which is fixedly connected to the central lifting rod 21. The sliding block 12 is also provided with an annular groove 123, and the sliding block 12 is rotatably mounted on the horizontal rotating ring 13 through the annular groove 123.

[0033] Through the structural cooperation of the sliding guide assembly 1 and the rotary locking assembly 2, the position of the central lifting rod 21 can be locked by a small amount of rotation when the central lifting rod 21 and the sliding sleeve 11 are at any relative height. This makes the device applicable to iron core workpieces 7 of different specifications and inner diameters.

[0034] The rotary locking assembly 2 also includes a tapered threaded platform 22 and a locking slider 23. The tapered threaded platform 22 is fixed to the central hanger 21. The longitudinal slide groove 121 is symmetrically provided with inclined slide grooves 122 on both sides. The locking slider 23 is symmetrically provided with guide slide shafts 231 on both sides. The guide slide shafts 231 are engaged and slidably disposed in the inclined slide grooves 122. The inner wall of the locking slider 23 is provided with threads, and the outer wall of the tapered threaded platform 22 is provided with threads, and the locking slider 23 and the tapered threaded platform 22 are connected by threads. The guide slide 111 and the locking slider 23 have mating toothed grooves on their end faces, which prevents them from sliding longitudinally after they are engaged.

[0035] By rotating the central lifting rod 21 and the sliding sleeve 11 relative to each other, the tapered threaded platform 22 and the locking slider 23 can be rotated relative to each other, thereby changing the extension of the locking slider 23 to complete the contact and engagement with the sliding sleeve 11, and using the self-locking characteristic of the thread to prevent the central lifting rod 21 from springing back and automatically unlocking after the rotational torque is removed.

[0036] The gravity self-locking adjustment component 3 includes an expansion shell 31 and a trapezoidal slider 32. The sliding sleeve 11 is fixedly connected to the top of the expansion shell 31. Sliding windows 311 are evenly distributed in a ring on the expansion shell 31. The trapezoidal slider 32 is engaged and slidably disposed in the sliding window 311.

[0037] During the upward lifting of the central lifting rod 21, the weight of the sliding guide assembly 1 and the gravity self-locking adjustment assembly 3 will cause the truncated cone 212 and the trapezoidal slider 32 to have a tendency to move relative to each other, thereby pushing the trapezoidal slider 32 to slide and expand outward synchronously, and thus adjusting the iron core workpiece 7 to a position coaxial with the central lifting rod 21.

[0038] The bottom of the central lifting rod 21 is provided with a cone 212. The trapezoidal slider 32 and the cone 212 slide in contact. When the trapezoidal slider 32 extends synchronously, it can abut against the inside of the iron core workpiece 7 and adjust the center position of the iron core workpiece 7.

[0039] The end compression assembly 4 includes an upper fixing ring 41, an upper locking nut 42, and a lower fixing ring 43. The upper fixing ring 41 and the lower fixing ring 43 are located at both ends of the iron core workpiece 7, respectively. The upper fixing ring 41 is provided with an extension screw 411, and the upper locking nut 42 and the extension screw 411 are connected by a threaded drive. The lower fixing ring 43 is provided with a sliding table 431.

[0040] The frame-type end-pressing assembly 5 includes a crossbeam 51 and a combination pin 52. The crossbeam 51 is provided with a middle ring 511, and the sliding sleeve 11 is located in the middle ring 511. The middle ring 511 is provided with a through pin hole portion 2 512, and the sliding sleeve 11 is provided with a pin hole portion 112. The combination pin 52 is provided in the pin hole portion 2 512 and the pin hole portion 112.

[0041] The frame-type end-pressing assembly 5 also includes a longitudinal beam 53 and a shoulder lifting ring 54. The longitudinal beam 53 and the cross beam 51 are connected by the shoulder lifting ring 54. The side of the longitudinal beam 53 is provided with an adjustment groove 531, and the extension screw 411 and the sliding table 431 are both located in the adjustment groove 531.

[0042] By using the end pressing assembly 4 and the frame-type end pressing assembly 5, pressure can be applied to both ends of the core workpiece 7 to prevent longitudinal deformation or lamination separation of the core workpiece 7 during temperature changes.

[0043] The end-pressure locking assembly 6 includes a set screw 61 and a lock nut 62. The set screw 61 and the longitudinal beam 53 are connected by a thread, and the lock nut 62 is located on the set screw 61.

[0044] The top of the central lifting rod 21 is provided with a central lifting ring 211. The gravity self-locking adjustment assembly 3 also includes a mounting column 33, which is located at the bottom of the expansion shell 31. The mounting column 33 is provided with a mounting pin hole 331.

[0045] In practical use, this device can be used for independent silicon steel sheets that have not been stacked and assembled, or for the entire stator core that has been stacked and assembled. Example 1: When used for fixing the annealing process of independent silicon steel sheets, since the stacked sheets are already separated in the longitudinal direction, it is not necessary to install the end extrusion assembly 4 and the end pressure locking assembly 6. At this time, the shoulder lifting ring 54 is first hoisted by the lifting tool, so that the gravity self-locking adjustment assembly 3 in the retracted state is placed in the center of the silicon steel sheet (the silicon steel sheet needs to be raised to the height of the trapezoidal slider 32 using other tooling). The lifting device is then removed from the shoulder ring 54 and installed on the center ring 211, and then lifted upwards. In the initial stage, both the sliding sleeve 11 and the gravity self-locking adjustment component 3 are stationary under their own gravity. The central lifting rod 21 rises relative to the sliding sleeve 11. Through the pushing action of the cone 212 on the trapezoidal slider 32, the trapezoidal slider 32 will expand outward synchronously until the trapezoidal slider 32 abuts against the inner ring of the silicon steel sheet. As the trapezoidal slider 32 slides outward synchronously, the originally relatively dispersed silicon steel sheets will be adjusted to a position coaxial with the expansion shell 31 and finally pressed together. After the silicon steel sheet is adjusted and tightened, the trapezoidal slider 32 can no longer extend. At this time, the central lifting rod 21 will rise together with the sliding sleeve 11 and the gravity self-locking adjustment component 3 to complete the initial fixing and hoisting of the silicon steel sheet.

[0046] During the above process, the sliding block 12 slides along the guide slide 111 and rises with the sliding sleeve 11. During this process, the locking slider 23 and the guide slide 111 do not contact each other. After the core workpiece 7 is fixed, the sliding sleeve 11 and the central lifting rod 21 are rotated relative to each other by a lifting device, manual labor or other auxiliary mechanisms (when rotating relative to each other, the bottom can be fixed by the mounting pin hole 331, and the top can be directly applied to the central lifting ring 211). When the central lifting rod 21 rotates, it will rotate relative to the sliding block 12. At the same time, the tapered threaded platform 22 and the locking slider 23 will rotate relative to each other. Through the threaded transmission between the tapered threaded platform 22 and the locking slider 23, the guide shaft 231 will slide outward along the inclined slide groove 122 until it is tightly engaged with the guide slide 111. The end faces of the guide slide 111 and the locking slider 23 are provided with mutually cooperating tooth grooves, so that the two cannot slide longitudinally after engagement, thereby completing the complete fixation of the silicon steel sheet.

[0047] Then, the device and the workpiece are fed into the furnace using a lifting device for annealing.

[0048] Example 2: When the stacked stator core is fixed by annealing, end limiting is required to prevent the already joined laminations from separating during the annealing process. The connection between the sliding sleeve 11 and the crossbeam 51 needs to be completed first through the combination pin 52. The initial position of the upper fixing ring 41 can be fixed and locked in advance. When the expansion shell 31 enters the interior of the iron core workpiece 7, the upper fixing ring 41 will naturally fall on the top of the iron core workpiece 7. Next, the central lifting rod 21 is raised. The adjustment and pre-fixing operation steps for the iron core workpiece 7 are the same as in Example 1. However, after the iron core workpiece 7 is raised, the lower fixing ring 43 needs to be installed and the lower fixing ring 43 is pressed against the lower end of the iron core workpiece 7 by rotating the set screw 61. Finally, the set screw 61 is prevented from loosening by locking the anti-loosening nut 62 (this step is not necessary and can be selected as appropriate).

[0049] The subsequent steps of complete rotation and annealing in the furnace are the same as in Example 1.

[0050] Example 3: As another independent embodiment of the present invention, the rotating locking component 2 can also be provided with other structural forms, as long as it can achieve the technical effect of rotating the central hanging rod 21 while pushing the locking slider 23 to slide laterally; for example, a thread can be directly provided on the central hanging rod 21, and then a linkage structure similar to an umbrella can be used to push the locking slider 23 to extend outward when the nut produces longitudinal displacement.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A stator core annealing locking fixture, characterized in that: The assembly includes a sliding guide assembly (1), a rotary locking assembly (2), a gravity self-locking adjustment assembly (3), an end pressing assembly (4), a frame-type end pressing assembly (5), and an end pressing locking assembly (6). The sliding guide assembly (1) is mounted on the gravity self-locking adjustment assembly (3), and the rotary locking assembly (2) is located within the sliding guide assembly (1). The rotary locking assembly (2) is capable of rotating and sliding axially within the sliding guide assembly (1). The end pressing assembly (4) is disposed on the frame-type end pressing assembly (5), the frame-type end pressing assembly (5) is detachably disposed on the sliding guide assembly (1), and the end pressing locking assembly (6) is disposed below the frame-type end pressing assembly (5); The sliding guide assembly (1) includes a sliding sleeve (11) and a sliding block (12). The inner wall of the sliding sleeve (11) is provided with guide slides (111) evenly distributed in a ring. The sliding block (12) is provided with a longitudinal slide groove (121) that matches the guide slide (111). The sliding block (12) is engaged and slidably disposed in the sliding sleeve (11) through the longitudinal slide groove (121).

2. The stator core annealing locking fixture according to claim 1, characterized in that: The rotating locking assembly (2) includes a central lifting rod (21), and the sliding guide assembly (1) also includes a horizontal rotating ring (13). The horizontal rotating ring (13) is fixed to the central lifting rod (21), and the sliding block (12) is also provided with an annular groove (123). The sliding block (12) is rotatably mounted on the horizontal rotating ring (13) through the annular groove (123).

3. The stator core annealing locking fixture according to claim 2, characterized in that: The rotary locking assembly (2) further includes a tapered threaded platform (22) and a locking slider (23). The tapered threaded platform (22) is fixed to the central lifting rod (21). The longitudinal slide groove (121) is symmetrically provided with inclined slide grooves (122) on both sides. The locking slider (23) is symmetrically provided with guide slide shafts (231) on both sides. The guide slide shafts (231) are engaged and slidably disposed in the inclined slide grooves (122). The inner wall of the locking slider (23) is provided with threads, and the outer wall of the tapered threaded platform (22) is provided with threads. The locking slider (23) and the tapered threaded platform (22) are connected by threads. The guide slide (111) and the locking slider (23) are provided with mutually cooperating toothed grooves on their end faces, so that the two cannot slide longitudinally after they are engaged.

4. The stator core annealing locking fixture according to claim 3, characterized in that: The gravity self-locking adjustment component (3) includes an expansion shell (31) and a trapezoidal slider (32). The sliding sleeve (11) is fixed above the expansion shell (31). The expansion shell (31) is provided with sliding windows (311) evenly distributed in a ring. The trapezoidal slider (32) is engaged and slidably disposed in the sliding window (311).

5. A stator core annealing locking fixture according to claim 4, characterized in that: The bottom of the central lifting rod (21) is provided with a cone (212). The trapezoidal slider (32) and the cone (212) slide in contact. When the trapezoidal slider (32) extends synchronously, it can abut against the interior of the iron core workpiece (7) and adjust the center position of the iron core workpiece (7).

6. The stator core annealing locking fixture according to claim 5, characterized in that: The end extrusion assembly (4) includes an upper fixing ring (41), an upper locking nut (42), and a lower fixing ring (43). The upper fixing ring (41) and the lower fixing ring (43) are located at both ends of the iron core workpiece (7). An extension screw (411) is provided on the upper fixing ring (41). The upper locking nut (42) and the extension screw (411) are threadedly driven. A sliding table (431) is provided on the lower fixing ring (43).

7. A stator core annealing locking fixture according to claim 6, characterized in that: The frame-type end-pressing assembly (5) includes a crossbeam (51) and a combination pin (52). The crossbeam (51) is provided with a middle ring (511). The sliding sleeve (11) is located in the middle ring (511). The middle ring (511) is provided with a through pin hole portion two (512). The sliding sleeve (11) is provided with a pin hole portion one (112). The combination pin (52) is located in the pin hole portion two (512) and the pin hole portion one (112).

8. A stator core annealing locking fixture according to claim 7, characterized in that: The frame-type end-pressing assembly (5) also includes a longitudinal beam (53) and a shoulder lifting ring (54). The longitudinal beam (53) and the cross beam (51) are connected by the shoulder lifting ring (54). The side of the longitudinal beam (53) is provided with an adjustment groove (531). The extension screw (411) and the sliding table (431) are both located in the adjustment groove (531).

9. A stator core annealing locking fixture according to claim 8, characterized in that: The end-pressure locking assembly (6) includes a set screw (61) and a lock nut (62), with the set screw (61) and the longitudinal beam (53) connected by a threaded drive, and the lock nut (62) is located on the set screw (61).

10. A stator core annealing locking fixture according to claim 9, characterized in that: The top of the central lifting rod (21) is provided with a central lifting ring (211), and the gravity self-locking adjustment assembly (3) also includes a mounting column (33). The mounting column (33) is located at the bottom of the expansion shell (31), and the mounting column (33) is provided with a mounting pin hole (331).

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