Automatic riveting equipment for movable iron core

Abstract

An automatic riveting device for a movable iron core relates to the technical field of material processing, and comprises a primary riveting device, a secondary riveting device, a secondary riveting device, a primary riveting device, a secondary riveting device, a secondary riveting device, a secondary riveting device and a secondary riveting device, and the primary riveting device is internally provided with a first positioning space for accommodating an upper shaft blank of the movable iron core and a second positioning space for accommodating a lower shaft blank of the movable iron core; the first positioning space and the second positioning space jointly form a positioning part for centering the axes of the upper shaft blank and the lower shaft blank; the primary riveting device further comprises a pushing unit, and the pushing unit is arranged on the side, away from the second positioning space, of the first positioning space, is provided with a pre-riveting pushing plate and is used for pre-pressing the upper shaft blank into the lower shaft blank to form a pre-riveting assembly. The final riveting device is arranged on the downstream of the primary riveting device and used for applying final riveting pressure to the pre-riveting assembly to complete forming; the primary conveying device is arranged on the upstream of the primary riveting device; and the secondary conveying device is arranged between the primary riveting device and the final riveting device. The full-automatic conveying and processing production efficiency is high, and the device is suitable for large-scale continuous production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material processing, and in particular to an automatic riveting and pressing equipment for a moving iron core. BACKGROUND

[0002] A circuit breaker is a key device for circuit protection, which can automatically cut off the current when overloading, short circuit and other faults occur. The core of its electromagnetic trip unit includes a moving iron core and a static iron core: the static iron core is fixed in the mechanism to provide a magnetic path, and the moving iron core acts as a movable part that is attracted to the static iron core under the action of the magnetic field to drive the trip mechanism to act. The response speed, displacement accuracy and cooperation reliability of the moving iron core directly determine the breaking performance and service life of the circuit breaker.

[0003] The manufacturing of the moving iron core mainly includes material forming, heat treatment, mechanical processing and assembly riveting of associated components. High-permeability materials such as silicon steel sheets are usually selected for production, which are cut and punched, laminated, heat treated to optimize magnetic properties, and subjected to corrosion-resistant surface treatment. In the upper and lower shaft butt joint and riveting process of the core, the traditional method faces significant challenges. The upper shaft and the lower shaft of the moving iron core assembly need to be subjected to a specific torque to ensure fastening, but because the shaft is slender, it is difficult to clamp and position, and it is easy to be damaged by deflection during riveting. Although the existing semi-automatic riveting tool attempts to limit the lower shaft in the axial and angular directions by customizing a clamp, and then manually or pneumatically applies riveting force, its adjustment relies on manual hole alignment, which lacks precision consistency, and it is difficult to adapt to rapid production change of multiple specifications of iron cores. Although the fully automatic production line integrates feeding and pressing modules, it is still a bottleneck to control the high-precision centering and torque of the slender shaft and core butt joint, which can easily lead to coaxiality deviation or insufficient pre-tightening force of the riveted assembly, affecting the smoothness and long-term reliability of the moving iron core in the circuit breaker. SUMMARY

[0004] The technical problem to be solved by the present application is how to solve the problems of insufficient operation precision, easy deflection damage and low efficiency of the existing riveting method.

[0005] To achieve the above object, according to one aspect of the present application, a moving iron core automatic riveting and pressing device is provided, comprising: a preliminary riveting device, which defines a first positioning space for accommodating an upper shaft blank of a moving iron core and a second positioning space for accommodating a lower shaft blank of the moving iron core, the first positioning space and the second positioning space together constitute a positioning part for aligning the upper shaft blank and the lower shaft blank; the preliminary riveting device further comprises a pushing unit, which is arranged on the side of the first positioning space away from the second positioning space and is provided with a preliminary riveting pushing plate for pressing the upper shaft blank into the lower shaft blank to form a preliminary riveting and pressing assembly; a final riveting device arranged downstream of the preliminary riveting device for applying a final riveting force to the preliminary riveting and pressing assembly to complete the forming; a first conveying device arranged upstream of the preliminary riveting device for adjusting the posture of the upper shaft blank and the lower shaft blank and aligning and transferring to the preliminary riveting device; a second conveying device arranged between the preliminary riveting device and the final riveting device for transferring the moving iron core after preliminary riveting and pressing to the final riveting device.

[0006] As a preferred embodiment of the above technical solution, the first conveying device comprises: first and second vibration discs arranged side by side for respectively adjusting the postures of the upper shaft blank and the lower shaft blank; first and second positioning seats arranged at the conveying ends of the first and second vibration discs respectively; a first clamping mechanism arranged above the first and second positioning seats for transferring the upper shaft blank between the first and second positioning seats; and a second clamping mechanism arranged above the second positioning seat and the preliminary riveting device for simultaneously transferring the upper shaft blank and the lower shaft blank to the preliminary riveting device.

[0007] As a preferred embodiment of the above technical solution, the second positioning seat is provided with a preliminary positioning space for simultaneously accommodating the upper shaft blank and the lower shaft blank and making the central axes of the two coincide; and the second positioning seat is further provided with a partition plate for separating the upper shaft blank and the lower shaft blank.

[0008] As a preferred embodiment of the above technical solution, the second clamping mechanism comprises two clamping jaws arranged side by side, the two clamping jaws respectively clamping the upper shaft blank and the lower shaft blank and keeping the upper shaft blank and the lower shaft blank coaxial during the conveying process.

[0009] As a preferred embodiment of the above technical solution, the preliminary riveting device further comprises a front clamping unit and a rear clamping unit, the front clamping unit is integrated on the rear clamping unit, the front clamping unit and the rear clamping unit are both clamping structures that can be horizontally separated / contracted with respect to a symmetry plane, the front clamping unit is contracted to form the first positioning space, the rear clamping unit is contracted to form the second positioning space, and the rear clamping unit is simultaneously horizontally separated / contracted with respect to the symmetry plane together with the front clamping unit.

[0010] As the preferred technical scheme of the above, the front clamping unit and the rear clamping unit are provided with an avoiding gap above, which can be used for the longitudinal exit of the clamping jaw of the second clamping mechanism after being opened.

[0011] As the preferred technical scheme of the above, the final riveting device comprises: a riveting pushing frame, which is used for pushing the pre-riveted movable iron core into a riveting die; the riveting die is fixed on the base frame of the movable iron core automatic riveting device, and is used for completing the final riveting; a return pushing frame is transmissionally connected with the riveting pushing frame through a guide column penetrating through the riveting die, and a return pushing rod is arranged on the return pushing frame, and the return pushing frame is used for pushing the riveting completed movable iron core out of the die when the riveting pushing frame returns.

[0012] As the preferred technical scheme of the above, a blanking slide is arranged below between the riveting pushing frame and the riveting die, and a collecting frame for collecting the riveting completed movable iron core is arranged below the outlet of the blanking slide.

[0013] As the preferred technical scheme of the above, the secondary conveying device comprises: a position correcting table arranged between the primary riveting device and the final riveting device; a position correcting conveying unit arranged above the position correcting table, which is used for conveying the workpiece between the position correcting table, the primary riveting device and the final riveting device; and a position adjusting assembly arranged on the position correcting table, which is used for adjusting the position of the movable iron core along the axial direction.

[0014] As the preferred technical scheme of the above, the first clamping mechanism, the second clamping mechanism and the position correcting conveying unit are controlled to move by the same control device, so that the step-by-step conveying is realized.

[0015] In summary, the present application has the following advantages:

[0016] 1. In the present application, the complete process from automatic feeding, accurate positioning, step-by-step riveting to automatic discharging is integrated, which replaces the traditional operation mode relying on manual feeding, hole positioning and riveting; the workstations are connected through the step-by-step synchronous conveying mechanism, the action is smooth, the rhythm is compact, the production cycle of single product is greatly shortened, the production efficiency is greatly improved, and it is very suitable for large-scale continuous production.

[0017] 2. Further, through the automatic orientation of the vibration disc, the initial positioning space and the baffle anti-collision design, the precise centering clamping of the primary riveting device and the two times of axial positioning in the secondary conveying device, the coaxiality and position accuracy of the upper and lower shaft blanks in the whole machining process are effectively ensured; the riveting process in stages avoids the internal stress concentration or part damage problem caused by single large deformation, so that the riveting quality is more stable and reliable, and the product consistency is good.

[0018] 3. The modular functional unit design and unified control system make the equipment structure stable and the operation smooth; the precise mechanical structure and automated control reduce human intervention and unstable factors, reduce the failure rate, and ensure that the equipment can operate stably for a long time.

[0019] Further or other beneficial effects will be discussed in the embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of area A;

[0022] Figure 3 This is a schematic diagram of the overall transport assembly line of the present invention;

[0023] Figure 4 This is a schematic diagram of the primary transportation device of the present invention;

[0024] Figure 5 This is a schematic diagram of the secondary transport device of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the second positioning seat and the second clamping mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the initial riveting device of the present invention;

[0027] Figure 8 This is a schematic diagram of another state of the initial riveting device of the present invention;

[0028] Figure 9 This is a schematic diagram of the final riveting device of the present invention;

[0029] Figure 10 for Figure 9 Enlarged view of area B;

[0030] Figure 11 This is a schematic diagram of the mold core structure of the present invention;

[0031] Figure 12 This is a schematic diagram of the upper shaft blank, lower shaft blank, and moving iron core structure of the present invention;

[0032] Among them, 1 is the initial riveting device, 11 is the propulsion unit, 111 is the pre-riveting push plate, 12 is the front clamping unit, 13 is the rear clamping unit, 101 is the avoidance notch, 2 is the final riveting device, 21 is the riveting push frame, 211 is the limiting circular groove, 22 is the riveting die, 221 is the front template, 222 is the rear template, 223 is the outer mold, 2231 is the limiting hole, 224 is the mold core, 2241 is the limiting groove, 23 is the return push frame, 231 is the return push rod, 24 is the guide post, 25 is the material dropping slide, 26 is the second motor, 27 is the linear driver, 3 is the primary transport device, 31 is the first vibratory feeder, 32 is the second vibratory feeder, 33 is the first positioning seat, 34 is the second positioning seat, 35 is the first clamping mechanism, 36 is the second clamping mechanism, 341 is the first arc-shaped support surface, 342 is the second arc-shaped support surface, 343 is the partition plate, 301 is the moving frame, 4 is the secondary transport device, 41 is the second motor, ... second motor, 42 is the first arc-shaped support surface, 343 is the second motor, 344 is the second motor, 345 is the first motor, 346 is the second motor, 347 is the second motor, 348 is the first motor, 349 is the second motor, 300 is the second motor, 41 is the third motor, 42 is the 42 Third clamping mechanism, 43 Fourth clamping mechanism, 44 Fifth clamping mechanism, 45 Third positioning seat, 46 Fourth positioning seat, 47 First adjustment unit, 48 Second adjustment unit, a Upper shaft blank, b Lower shaft blank. Detailed Implementation

[0033] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0034] In this embodiment, the parts to be processed are named at different stages. Before processing, the two raw materials are named upper shaft blank a and lower shaft blank b, respectively. (Refer to...) Figure 12 The upper shaft blank a has a mating part at its end, and the lower shaft blank b also has a mating hole inside; the assembly after the initial pre-riveting is named the pre-riveting assembly in this embodiment; the part after the final riveting is called the riveted moving iron core.

[0035] The present invention will be further explained below with reference to the embodiments:

[0036] Example:

[0037] An automatic riveting device for moving iron cores, referring to Figure 1The system includes a basic structure, a preliminary riveting device 1, a final riveting device 2, a primary transport device 3, and a secondary transport device 4. The basic structure provides a stable mounting base for the entire equipment, upon which all other structures and devices are mounted, ensuring overall stability during operation. The preliminary riveting device 1 is used to pre-rivet the upper shaft blank a and the lower shaft blank b, forming a pre-riveted assembly. The final riveting device 2, located downstream of the preliminary riveting device 1, applies the final riveting pressure to the pre-riveted assembly, completing the forming of the moving iron core. The primary transport device 3, located upstream of the preliminary riveting device 1, is responsible for adjusting the posture and aligning the upper shaft blank a and the lower shaft blank b during transport. The secondary transport device 4, located between the preliminary riveting device 1 and the final riveting device 2, is responsible for transporting the pre-riveted assembly to the final riveting device 2 for final processing.

[0038] The basic architecture employs a rigid frame structure with precise mounting reference surfaces. Each functional module is securely connected to the basic architecture using locating pins and bolts. Internally, the basic architecture includes routing channels for power cables and pneumatic piping, ensuring the equipment's neatness and safety. The entire basic architecture is mounted on the ground using shock-absorbing feet, effectively reducing vibration transmission during equipment operation.

[0039] Reference Figure 7 and Figure 8 The initial riveting device 1, as one of the core components of this equipment, internally defines a first positioning space for accommodating the upper shaft blank a and a second positioning space for accommodating the lower shaft blank b. These two spaces together constitute a positioning part that precisely aligns the axes of the upper and lower shaft blanks. The initial riveting device 1 also includes a propulsion unit 11, which is located on the side of the first positioning space away from the second positioning space and is equipped with a pre-riveting push plate 111. The propulsion unit 11 is fixedly mounted on the foundation structure via a connecting frame. Specifically, it includes a first motor and the pre-riveting push plate 111. The motor provides power for the axial movement of the pre-riveting push plate 111 along the upper shaft blank a, ensuring a smooth and reliable process of pre-pressing the upper shaft blank a into the lower shaft blank b to form the pre-riveting assembly.

[0040] The initial riveting device 1 also includes a front clamping unit 12 and a rear clamping unit 13. The front clamping unit 12 is integrated onto the rear clamping unit 13, and both are clamping structures that can be laterally separated or joined together on a symmetrical plane. When the front clamping unit 12 is joined together, it forms a first positioning space, and when the rear clamping unit 13 is joined together, it forms a second positioning space. The rear clamping unit 13 works in conjunction with the front clamping unit 12 to simultaneously separate or join laterally, ensuring the synchronicity and stability of workpiece clamping. A clearance notch 101 is provided above the front clamping unit 12 and the rear clamping unit 13. This notch allows the clamping jaws of the second clamping mechanism 36 to open and then retract longitudinally, avoiding mechanical interference.

[0041] Reference Figure 9 , Figure 10and Figure 11 The final riveting device 2 includes a riveting pusher 21, a riveting die 22, and a return pusher 23. The riveting pusher 21 is used to push the pre-riveted moving iron core into the riveting die 22 to complete the final riveting. The riveting die 22 is fixed on the basic frame of the equipment and has high precision and high wear resistance. The riveting pusher 21 has a limiting groove 211 on the side facing the riveting die 22. The limiting groove 211 is adapted to the bottom of the pre-riveting component to ensure the correct positioning of the component during the riveting process. The return pusher 23 is connected to the riveting pusher 21 through the riveting die 22 via a guide post 24. It is equipped with a return pusher 231, which can extend into the riveting die 22 when returning to its original position. Therefore, when the riveting pusher 21 returns to its original position, the return pusher 231 can push the riveted moving iron core out of the die, realizing automatic unloading.

[0042] Specifically, the riveting die 22 includes a front template 221, a rear template 222, an outer die 223, and a die core 224. The rear template 222 is located near the riveting pusher 21, and the front template 221 is located near the return pusher 23. The outer die 223 is clamped between the front template 221 and the rear template 222 to form a fixed and detachable structure. The die core 224 is a key component in the forming process. Its outer contour is cylindrical, and it has limit grooves 2241 on both sides. The die core 224 is disposed inside the outer die 223. The outer die 223 has longitudinal limit holes 2231. The die core 224 is fixed by inserting pins into the limit holes 2231, which restricts its axial movement and circumferential rotation within the outer die 223. The front template 221 has guide post 24 holes for the guide posts 24 to pass through, ensuring the smooth movement of the return pusher mechanism. The power of the riveting pusher 21 comes from the second motor 26 and the linear driver 27, which provides a strong driving force to the riveting pusher 21 to ensure that the pre-riveting component is smoothly pushed into the riveting mold 22 for shaping.

[0043] Below the final riveting device 2, a material drop slide 25 is provided, with a collection frame placed below its outlet for automatically collecting the finished moving iron core after riveting. The material drop slide 25 is lined with a flexible material to prevent surface damage to the finished product during the descent.

[0044] Reference Figure 2 and Figure 4The primary transport device 3 includes a first vibratory feeder 31 and a second vibratory feeder 32 arranged side by side, used to adjust the posture of the upper shaft blank a and the lower shaft blank b, respectively. The vibratory feeders cause the workpieces to climb along a spiral track through vibration, and the specific structure on the track adjusts the workpiece posture, ensuring all workpieces are output in a uniform direction. A first positioning seat 33 and a second positioning seat 34 are respectively provided at the conveying ends of the first vibratory feeder 31 and the second vibratory feeder 32. A first clamping mechanism 35 is provided above the first positioning seat 33 and the second positioning seat 34, used to transfer the upper shaft blank a between the first positioning seat 33 and the second positioning seat 34. A second clamping mechanism 36 is provided above the second positioning seat 34 and the initial riveting device 1, used to simultaneously transfer the upper shaft blank a and the lower shaft blank b to the initial riveting device 1.

[0045] Reference Figure 6 The second positioning seat 34 is provided with an initial positioning space, which can simultaneously accommodate the upper shaft blank a and the lower shaft blank b, ensuring that their central axes are collinear. Specifically, the second positioning seat 34 includes a first arc-shaped support surface 341 for supporting the upper shaft blank a and a second arc-shaped support surface 342 for supporting the lower shaft blank b. The central axis of the first arc-shaped support surface 341 and the central axis of the second arc-shaped support surface 342 are coplanar. The second positioning seat 34 is also provided with a partition 343, which separates the upper shaft blank a and the lower shaft blank b between the first arc-shaped support surface 341 and the second arc-shaped support surface 342. This design solves the problem that the lower shaft blank b may collide with the upper shaft blank a due to the transport inertia, protects the predetermined clamping position of the upper shaft blank a, and ensures the alignment accuracy of subsequent processes. The second clamping mechanism 36 includes two clamping claws arranged in parallel, which can clamp the upper shaft blank a and the lower shaft blank b respectively, and keep them coaxial during transportation, in preparation for subsequent pre-riveting.

[0046] Reference Figure 5 The secondary transport device 4 includes a straightening platform, a straightening transport unit, and an adjustment assembly. The straightening platform is located between the initial riveting device 1 and the final riveting device 2. The straightening transport unit is located above the straightening platform and is used to transport the workpiece between the straightening platform, the initial riveting device 1, and the final riveting device 2. The adjustment assembly is located on the straightening platform and is used to adjust its position along the axial direction of the moving iron core to ensure accurate positioning before riveting.

[0047] Specifically, the positioning and transport unit includes a third clamping mechanism 41, a fourth clamping mechanism 42, and a fifth clamping mechanism 43, while the positioning table includes a third positioning seat 44 and a fourth positioning seat 45. The adjustment assembly includes a first adjustment unit 46 and a second adjustment unit 47. The first adjustment unit 46 is disposed on one side of the third positioning seat 44 for axially pushing the pre-riveting assembly on the third positioning seat 44, and the second adjustment unit 47 is disposed on one side of the fourth positioning seat 45 for axially pushing the pre-riveting assembly on the fourth positioning seat 45. Through two precise axial pushes, the pre-riveting assembly can be accurately positioned, ensuring accurate positioning when clamped into the final riveting device 2 and avoiding interference and collision.

[0048] Reference Figure 3 All clamping mechanisms of the equipment are controlled by the same control device to achieve step-by-step transport. Specifically, the first clamping mechanism 35, the second clamping mechanism 36, the third clamping mechanism, the fourth clamping mechanism 42, and the fifth clamping mechanism 43 are all mounted on the same moving frame 301. The clamping claws of each clamping mechanism are controlled by the same cylinder (the cylinder and corresponding air pipes are not shown in the figure) to open and close horizontally simultaneously. The moving frame 301 periodically moves back and forth horizontally, coordinating with the synchronous opening and closing of the clamping claws, realizing the step-by-step precise transfer of workpieces between each station, improving production efficiency while ensuring positioning accuracy.

[0049] In this embodiment, the first clamping mechanism 35, the second clamping mechanism 36, the third clamping mechanism, the fourth clamping mechanism 42, and the fifth clamping mechanism 43 are all clamping claws. The clamping profile of the clamping claw of the first clamping mechanism 35 is the cross-sectional profile of the upper shaft blank a. The clamping end of the second clamping mechanism 36 used to clamp the upper shaft blank a has the same clamping profile as the clamping claw of the first clamping mechanism 35. The other clamping claw of the second clamping mechanism 36 has the same profile as the clamping claw of the third clamping mechanism, the fourth clamping mechanism 42, and the fifth clamping mechanism 43, which is the maximum cross-sectional profile of the lower shaft blank b.

[0050] The workflow of this equipment can be divided into five main stages, as follows:

[0051] Material loading and initial positioning stage: The operator pours the upper shaft blank a and the lower shaft blank b into the first vibratory plate 31 and the second vibratory plate 32, respectively. The vibratory plates are started, and through vibration screening and orientation, the blanks enter the conveyor track in a uniform posture and arrive at the first positioning seat 33 and the second positioning seat 34, respectively. The first clamping mechanism 35 transfers the upper shaft blank a on the first positioning seat 33 to the second positioning seat 34, where it is coaxially aligned with the lower shaft blank b in the initial positioning space and separated by a partition 343 to prevent collision.

[0052] Pre-riveting stage: The second clamping mechanism 36 operates synchronously, transferring the aligned blank assembly it clamps to the initial riveting device 1. The front clamping unit 12 and the rear clamping unit 13 of the initial riveting device 1 close, forming a precise positioning space. Subsequently, the pushing unit 11 operates, and the pre-riveting push plate 111 presses the upper shaft blank a into the lower shaft blank b with a controllable force, forming the pre-riveting assembly.

[0053] Positioning and correction stage: The pre-riveting assembly is transferred by the third clamping mechanism 41 to the third positioning seat 44 on the correction table. The first adjustment push rod performs the first axial position correction. Subsequently, the fourth clamping mechanism 42 transfers it to the fourth positioning seat 45, where the second adjustment push rod performs the second precise positioning. This step ensures the accurate positioning of the assembly entering the final riveting device 2.

[0054] Final riveting stage: The pre-riveting assembly, after precise positioning, is fed into the final riveting device 2 by the fifth clamping mechanism 43. The riveting pusher 21 first advances, using its limiting groove 211 to hold the bottom of the assembly for initial positioning; after the grippers retract, the riveting pusher 21, under the action of the main drive unit, pushes the assembly completely into the riveting mold 22 with a huge and stable force, completing the final forming.

[0055] Material collection stage: After riveting is completed, the riveting pusher 21 retracts, and the linkage pusher 23 ejects the finished moving iron core from the mold. The finished product slides along the material discharge slide 25 into the collection box at the end, completing the entire automated production process.

[0056] This invention relates to an automatic riveting equipment for moving iron cores. Through multi-station coordinated operation, it achieves fully automated production of moving iron cores from material feeding, pre-riveting, precise positioning to final riveting. The equipment employs a precision positioning system and clamping device to ensure the coaxiality and positional accuracy of components during the riveting process. A stepping transport system and a multi-stage adjustment mechanism effectively prevent workpiece skewing and collisions during processing. The staged riveting method ensures riveting quality while preventing internal stress concentration problems that may occur with single-stage forming. Compared with traditional manual or semi-automatic riveting processes, this equipment significantly improves production efficiency and product consistency, and is particularly suitable for the large-scale automated production of moving iron cores in circuit breaker electromagnetic trip units.

[0057] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0058] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An automatic riveting device for a moving iron core, characterized in that, include: The initial riveting device (1) defines a first positioning space for accommodating the upper shaft blank of the moving iron core and a second positioning space for accommodating the lower shaft blank of the moving iron core. The first positioning space and the second positioning space together constitute a positioning part that aligns the axes of the upper shaft blank and the lower shaft blank. The initial riveting device (1) also includes a pushing unit (11). The pushing unit (11) is located on the side of the first positioning space away from the second positioning space and is provided with a pre-riveting push plate (111) for pre-pressing the upper shaft blank into the lower shaft blank to form a pre-riveting assembly. The final riveting device (2) is located downstream of the initial riveting device (1) and is used to apply the final riveting pressure to the pre-riveting assembly to complete the forming. A primary transport device (3) is located upstream of the initial riveting device (1) and is used to adjust the posture of the upper shaft blank and the lower shaft blank and align and transport them to the initial riveting device (1). A secondary transport device (4) is set between the initial riveting device (1) and the final riveting device (2) for transporting the pre-riveted moving iron core to the final riveting device (2).

2. The automatic riveting equipment for a moving iron core according to claim 1, characterized in that, The primary transport device (3) includes: A first vibrating plate (31) and a second vibrating plate (32) are arranged side by side for adjusting the posture of the upper shaft blank and the lower shaft blank respectively; a first positioning seat (33) and a second positioning seat (34) are respectively arranged at the conveying ends of the first vibrating plate (31) and the second vibrating plate (32). A first clamping mechanism (35) is provided above the first positioning seat (33) and the second positioning seat (34) for transferring the upper blank between the first positioning seat (33) and the second positioning seat (34). The second clamping mechanism (36) is located above the second positioning seat (34) and the initial riveting device (1) and is used to simultaneously transfer the upper shaft blank and the lower shaft blank to the initial riveting device (1).

3. The automatic riveting equipment for a moving iron core according to claim 2, characterized in that, The second positioning seat (34) is provided with an initial positioning space for simultaneously accommodating the upper shaft blank and the lower shaft blank and making their central axes collinear; the second positioning seat (34) is also provided with a partition (343) for separating the upper shaft blank and the lower shaft blank.

4. The automatic riveting equipment for a moving iron core according to claim 3, characterized in that, The second clamping mechanism (36) includes two clamping claws arranged side by side, which clamp the upper shaft blank and the lower shaft blank respectively, and keep the upper shaft blank and the lower shaft blank coaxial during transportation.

5. The automatic riveting equipment for a moving iron core according to claim 1, characterized in that, The initial riveting device (1) further includes a front clamping unit (12) and a rear clamping unit (13). The front clamping unit (12) is integrated on the rear clamping unit (13). Both the front clamping unit (12) and the rear clamping unit (13) are clamping structures that can be separated / joined laterally with a symmetrical plane. The front clamping unit (12) is joined together to form the first positioning space, and the rear clamping unit (13) is joined together to form the second positioning space. The rear clamping unit (13) works in conjunction with the front clamping unit (12) to be separated / joined laterally at the same time.

6. The automatic riveting equipment for a moving iron core according to claim 5, characterized in that, The front clamping unit (12) and the rear clamping unit (13) are provided with clearance notches (101) for the clamping claws of the second clamping mechanism (36) to open and then longitudinally withdraw.

7. The automatic riveting equipment for a moving iron core according to claim 1, characterized in that, The final riveting device (2) includes: The riveting pusher (21) is used to push the pre-riveted moving iron core into the riveting die (22). The riveting die (22) is fixed on the base frame of the automatic riveting equipment for the moving iron core and is used to complete the final riveting. The pusher (23) passes through the riveting mold (22) and is connected to the riveting pusher (21) via the guide post (24). The pusher (23) is provided with a pusher rod (231). The pusher (23) is used to push the riveted moving iron core out of the mold when the riveting pusher (21) returns to its original position.

8. The automatic riveting equipment for a moving iron core according to claim 7, characterized in that, A material drop slide (25) is provided below the riveting pusher (21) and the riveting mold (22), and a collection frame for collecting the moving iron core after riveting is provided below the outlet of the material drop slide (25).

9. The automatic riveting equipment for a moving iron core according to claim 1, characterized in that, The secondary transport device (4) includes: A positioning platform is disposed between the initial riveting device (1) and the final riveting device (2); A positioning and transport unit is disposed above the positioning table and is used to transport workpieces between the positioning table, the initial riveting device (1) and the final riveting device (2). The adjustment component is set on the correction platform and is used to adjust the position of the moving iron core along the axial direction.

10. An automatic riveting device for a moving iron core according to claim 9, characterized in that, The first clamping mechanism (35), the second clamping mechanism (36) and the positioning and transport unit are controlled by the same control device to move, thereby realizing step-by-step transport.

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