Automatic feeding and riveting equipment for magneto stator cores

Abstract

This invention discloses an automatic feeding and riveting device for stator cores of magneto motors. The upper side of the station turntable is provided with a die holder arranged circumferentially. The die holder has a riveting groove matching the stator core, comprising a core body groove and a pole foot groove located circumferentially to the core body groove. A drive module is configured on the lower side of the station turntable to drive its rotation. A feeding system, a punch press, and an unloading system are arranged sequentially on the outer circumference of the station turntable. A conversion mechanism is provided between the feeding system and the station turntable to convert the wound pole feet from the feeding system into the pole foot grooves. The punch press rivets the wound pole feet in the riveting grooves to the circumference of the core body. The unloading system removes the riveted stator core from the die holder. The beneficial effects are: effectively improving the riveting efficiency of split stator cores, reducing labor intensity, lowering production costs, effectively preventing misalignment, improving quality, and reducing scrap rates.

Description

Technical Field

[0001] This invention relates to a magneto stator core assembly equipment, specifically to an automatic material feeding and riveting equipment for magneto stator cores. Background Technology

[0002] Most magneto stator cores are of a laminated structure, which consists of several laminations. Each lamination includes a central main body and multiple poles distributed circumferentially along the main body for winding.

[0003] In earlier manufacturing processes, ferrite chips were formed by integral stamping, meaning that the main body and leads of the ferrite chip were stamped together on a stamping press in one step. Since a single ferrite chip has multiple radially extending leads around its circumference, regardless of how they are arranged on the stamping die, a significant amount of waste is left after integral stamping. Therefore, integral stamping has the problems of being unfavorable for material layout and having low material utilization.

[0004] To overcome the problem of low material utilization in overall stamping, a utility model patent with publication number CN212381000U discloses a magneto stator core. The single iron chip is designed as a split structure, with the core body and the circumferential winding poles being stamped independently and then combined into a whole for use.

[0005] In the existing production process, after the core body and winding terminals of the split-type iron chip are punched and formed, the winding terminals are assembled onto the circumference of the core body using a riveting process. The current problem is that the winding terminals must be manually placed one by one onto the punching fixture, and finally riveted by the punch. Manual placement of the winding terminals is inefficient, prone to misplacement, and results in inconsistent riveting quality and a high rate of scrap. Summary of the Invention

[0006] In view of the above situation, the present invention provides an automatic feeding and riveting device for magneto stator cores to solve the technical problems of low efficiency, easy misplacement, unstable riveting quality and large scrap volume caused by manual placement of winding pole feet.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] An automatic feeding and riveting device for magneto stator cores, the key feature of which is that it includes a station turntable, the upper side of which is provided with a die holder arranged along its circumference, the die holder is provided with a riveting groove that matches the iron core, the riveting groove includes an iron core body groove and a pole foot groove located circumferentially in the iron core body groove, and a drive module is arranged on the lower side of the station turntable for driving the station turntable to rotate.

[0009] A feeding system, a punch press, and an unloading system are arranged sequentially on the outer side of the circumference of the workstation turntable. A conversion mechanism is provided between the feeding system and the workstation turntable to convert the winding poles from the feeding system into the pole slots. The punch press is used to rivet the winding poles in the riveting slots onto the circumference of the iron core body. The unloading system is used to remove the riveted iron core from the die holder.

[0010] Preferably, the feeding system includes a vibratory feeder, with a correction slide mounted on the upper part of the vibratory feeder. The correction slide includes an arc-shaped support plate, which is inclined outwards as a whole. The front part of the support plate is provided with a side baffle and a guide rod. The guide rod extends upwards at an inclination along the feeding direction of the correction slide to guide the main side of the winding pole to keep it in contact with the side baffle. The rear end of the support plate is connected to an arc-shaped support wire, the arc of which is consistent with that of the support plate. There is a gap between the front part of the support wire and the support plate in the height direction. The rear parts of both the support wire and the support plate are spirally bent downwards so that the gap gradually changes from the height direction to the horizontal direction.

[0011] Preferably, the rear of both the supporting steel wire and the supporting plate has a horizontal extension section, the lower end of which is connected to a guide trough, the guide trough is arranged at an inclination, and the lower end of the guide trough is connected to a conveyor belt, the conveyor belt being arranged horizontally.

[0012] Preferably, the conversion mechanism includes a positioning ring installed between the feeding system and the station turntable, a tray rotatably disposed within the positioning ring, and a driver for driving the tray to rotate. The tray has transfer notches distributed on its circumferential edge, and the positioning ring has a transition notch that docks with the feeding system.

[0013] A bracket is suspended above the tray, and a lifting cylinder that can move between the tray and the workstation turntable is installed on the inner side of the bracket. An electromagnetic chuck is fixedly connected to the cylinder rod of the lifting cylinder, and the electromagnetic chuck is located above the tray.

[0014] Preferably, the transfer notch is an isosceles trapezoidal groove structure, with the length of one end near the center of the tray being shorter than the other end.

[0015] Preferably, the upper end of the feed trough is provided with a cover block, and a guide block is fixedly provided on the upper end of the cover block, the guide block extending beyond the horizontal extension section in the height direction.

[0016] Preferably, the inner end of the rear portion of the support piece is provided with a stepped notch.

[0017] Preferably, the punch press has a riveting punch that can move up and down above the workstation turntable, and the lower end of the riveting punch has a punch block that matches the number of the pole foot grooves. The projection of the punch block in the water surface is located in the pole foot groove.

[0018] Preferably, the core body groove is provided with two sets of upwardly extending positioning posts.

[0019] Preferably, the station turntable is provided with six sets of the die holders in the circumference, and three sets of feeding systems and three sets of conversion mechanisms corresponding to the three sets of feeding systems are arranged on the outer side of the station turntable in the circumference.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The automatic feeding and riveting equipment for magneto stator cores provided by this invention can effectively improve the riveting efficiency of stator cores by using an automated flow process, reduce the labor intensity of workers, reduce production costs, and effectively prevent misalignment, improve quality, and reduce scrap rate. Attached Figure Description

[0022] Figure 1 A top view of an automatic feeding and riveting equipment for magneto stator cores;

[0023] Figure 2 This is a schematic diagram of an automatic feeding and riveting equipment for magneto stator cores.

[0024] Figure 3 This is a partial schematic diagram showing the layout of the feeding system A;

[0025] Figure 4 This is a schematic diagram of the structure of the vibration sorting section at the front end of the feeding system A;

[0026] Figure 5 This is a schematic diagram of the structure when the winding pole foot 7a is installed in the correction slide 1b on the vibratory plate 1.

[0027] Figure 6 For Figure 5 A magnified view of a portion of point I;

[0028] Figure 7 A partially enlarged schematic diagram illustrating the working principle of the conversion mechanism 6;

[0029] Figure 8 This is a schematic diagram showing how the riveting punch B1 rivets the winding pole 7a to the circumference of the iron core body 7b;

[0030] Figure 9 and Figure 10 These are schematic diagrams of the automatic feeding and riveting equipment for magneto stator cores from different perspectives. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0032] like Figure 1and 2 As shown, an automatic feeding and riveting device for magneto stator cores includes a station turntable 3. Six sets of die holders 4 are mounted on the upper side of the turntable 3, arranged in an array along the circumference of the turntable 3. A drive module 3a is configured on the lower side of the turntable 3, controlling its rotation. The die holders 4 have riveting grooves matching the core ferrite cores, including a core body groove 4a and pole foot grooves 4b located circumferentially around the core body groove 4a. The core body groove 4a accommodates the core body 7b, and the pole foot grooves 4b accommodate the wound pole feet 7a.

[0033] For example Figure 1 As shown, three feeding systems A, a punch press B, and an unloading system C are arranged sequentially on the outer periphery of the rotary table 3. Each feeding system A is connected to the rotary table 3 by a conversion mechanism 6, which is used to transfer the wound electrode from the feeding system A into the electrode slot 4b. The punch press B is used to rivet the wound electrode in the riveting slot to the circumference of the iron core body. The unloading system C is used to remove the riveted iron core from the rotary table 3.

[0034] Based on the above structural arrangement, the operating principle of the automatic feeding and riveting equipment for magneto stator cores is as follows:

[0035] The six sets of die holders (4) constitute six operating stations. Figure 1 The lowest die holder 4 is the initial station. At this station, the iron core body 7b of the ferrite chip is manually placed into the iron core body slot 4a. Then, the drive module 3a drives the station turntable 3 to rotate clockwise. The die holder 4 with the iron core body 7b moves to the next station, which is the first feeding system A at the front. The feeding system A transports the winding electrode 7a one by one to the corresponding conversion mechanism 6. Then, the conversion mechanism 6 converts the winding electrode into the corresponding electrode slot 4b of the die holder 4. And so on. Because the ferrite chip iron core body usually has three specifications of winding electrode in the circumference, the three feeding systems A and the conversion mechanism 6 transfer the winding electrode of the corresponding specification to the corresponding electrode slot 4b of the die holder 4 in the above manner. After the iron core body 7b and all the winding poles 7a are placed in the die holder 4, the drive module 3a drives the die holder 4 to rotate below the punch press B. The riveting punch B1 of the punch press B moves downward to rivet the winding poles 7a to the perimeter of the iron core body 7b, completing the assembly of a single iron chip. Finally, the die holder 4 rotates to the position of the unloading system C, and the unloading system C removes the formed iron chip from the die holder 4.

[0036] Clearly, by using automated riveting processes to press iron cores, the efficiency of riveting separate stator cores can be effectively improved, the labor intensity of workers can be reduced, production costs can be lowered, and misalignment can be effectively prevented, quality can be improved, and the scrap rate can be reduced.

[0037] To better achieve the sequential conveying of each winding electrode 7a, this embodiment provides a specific feeding system A application structure, as follows:

[0038] Please refer to Figure 3 As shown, the feeding system A includes a vibratory plate 1, a guide chute 2, and a conveyor belt 5. The inner wall of the vibratory plate 1 is provided with a spirally upward vibratory slide 1a. A correction slide 1b is installed on the upper part of the vibratory plate 1. The front end of the correction slide 1b is connected to the upper end of the vibratory slide 1a, and the rear end is connected to the guide chute 2. The lower end of the guide chute 2 is connected to the conveyor belt 5, and the other end of the conveyor belt 5 is connected to the conversion mechanism 6. Based on this, after the feeding system A is started, the winding pole 7a in the vibratory plate 1 can be transported sequentially through the vibratory slide 1a → correction slide 1b → guide chute 2 → conveyor belt 5 to the position of the conversion mechanism 6.

[0039] Furthermore, given the unique characteristics of the winding pole foot 7a structure, this embodiment further designs the application structure of the correction slide 1b, as follows:

[0040] Please refer to Figure 4 As shown, the correction slide 1b consists of a support plate 1b1, a side baffle 1b2, a guide rod 1b3, and a support wire 1b4. The support plate 1b1 has an arc-shaped structure, with its upper surface inclined outwards. The side baffle 1b2 and guide rod 1b3 are located at the front of the support plate 1b1. The side baffle 1b2 extends upwards relative to the support plate 1b1, and the guide rod 1b3 extends upwards at an incline along the feeding direction of the correction slide 1b. The support wire 1b4 is connected to the rear end of the support plate 1b1. The support wire 1b4 also has an arc-shaped structure, with its arc direction consistent with that of the support plate 1b1. A gap s exists between the front of the support wire 1b4 and the support plate 1b1 in the height direction. The rear parts of both the support wire 1b4 and the support plate 1b1 are spirally bent downwards, causing the gap s to gradually change from the height direction to a horizontal gap s.

[0041] Please refer to Figure 5 As shown, the winding pole foot 7a has an approximately T-shaped structure, with a wide end b and a narrow end a. When the correction slide 1b is in use, the distance between the side baffle 1b2 and the guide rod 1b3 is greater than the thickness of the winding pole foot 7a plate and less than the length of the wide end b. The length of the wide end b is greater than the aforementioned gap s. After a batch of winding pole feet 7a are loaded into the vibratory feeder 1, the winding pole feet 7a enter the correction slide 1b along the vibratory slide 1a. Then, under the guidance of the guide rod 1b3, each winding pole foot 7a is adjusted to a side-lying position, that is, the main side of the winding pole foot 7a slides in contact with the side baffle 1b2. At this time, please refer to... Figure 5The winding pole 7a still has two postures: posture one is that the wide end b is completely downward, and posture two is that the wide end b and the narrow end a are both downward. Then, the winding pole 7a in these two postures continues to move. When the winding pole 7a with the wide end b and the narrow end a both downward moves to the position of the support wire 1b4, since the upper surface of the support plate 1b1 is tilted outward, the narrow end a will pass through the gap s and turn outward. The wide end b is limited by the support wire 1b4. The winding pole 7a moves to the rear end position under the guidance of the support wire 1b4. The winding pole 7a that slides to the rear end of the correction slide 1b according to this pattern are all in the posture of wide end b upward and narrow end a downward, thus unifying the posture of the winding pole 7a, that is, realizing the sequential sorting of the poles.

[0042] like Figure 4 As shown, both the supporting steel wire 1b4 and the supporting plate 1b1 have horizontal extension sections 1b6 at their rear ends. This design ensures that the winding pole feet 7a at this location are arranged in an orderly manner. Furthermore, the guide trough 2 is fixedly installed outside the vibratory feeder 1 via a bracket 2b. The guide trough 2 is inclined, with its upper end abutting against the horizontal extension section 1b6. A guide block 2a is fixedly installed on the upper part of the guide trough 2 near the horizontal extension section 1b6, and the guide block 2a extends beyond the horizontal extension section 1b6 in the height direction. Based on this, please refer to... Figure 6 As the winding pole 7a on the horizontal extension section 1b6 continues to move forward, the wide end b will be blocked by the guide block 2a. At this time, the narrow end a at the bottom moves forward, thus ensuring that the winding pole 7a can fall into the guide trough 2 in a uniform orientation, and then slide down to the lower conveyor belt 5. Thus, the winding poles 7a that are placed in the vibratory plate 1 in batches are conveyed to the conversion mechanism 6 one by one in a uniform orientation.

[0043] For example Figure 6 As shown, in order to ensure that the winding electrode 7a can fall stably into the guide groove 2, a cover block 2c is provided at the upper end of the guide groove 2. The guide block 2a is integrally formed on one end of the cover block 2c. The cover block 2c can prevent the electrode from rotating excessively, falling outside the guide groove 2, or the winding electrode 7a from facing the wrong direction.

[0044] For example Figure 6 As shown, the inner end of the rear part of the support plate 1b1 is provided with a stepped notch 1b5. As mentioned above, the winding pole foot 7a that slides in contact with the side baffle 1b2 on the main side has two postures. Among them, the winding pole foot 7a with the wide end b facing down will move forward along the support wire 1b4. When it moves to the position of the stepped notch 1b5, it can automatically fall back into the vibrating plate 1.

[0045] To better transfer the winding electrode from the feeding system A to the corresponding die holder 4, this embodiment provides a specific application structure of the transfer mechanism 6, as follows:

[0046] Please refer to Figure 2 The conversion mechanism 6 includes a support base 6h located between the feeding system A and the workstation turntable 3, specifically between the conveyor belt 5 and the workstation turntable 3. A positioning ring 6a, a tray 6b, a driver 6c, a lifting cylinder 6e, and an electromagnetic chuck 6f are mounted on the upper part of the support base 6h. (See attached diagram.) Figure 7 As can be seen, the positioning ring 6a is fixedly mounted on the top of the support base 6h, and the tray 6b is rotatably positioned inside the positioning ring 6a. The driver 6c is a servo drive motor, with the motor's base fixed below the positioning ring 6a. The motor's output shaft 6c1 is fixedly connected to the center of the tray 6b. When the driver 6c is working, it drives the tray 6b to rotate. The support base 6h has an upwardly extending bracket 6d on one side. The cylinder seat h of the lifting cylinder 6e is slidably mounted on the bracket 6d. The lower end of the cylinder rod e of the lifting cylinder 6e is fixedly connected to an electromagnetic chuck 6f, which is located above the tray 6b.

[0047] For example Figure 7 As shown, transfer notches c are distributed on the circumferential edge of the pallet 6b, and transition notches d are provided on the positioning ring 6a. The right end of the conveyor belt 5 of the feeding system A is connected to the transition notch d. The front conveyor belt 5 pushes the winding pole 7a from the transition notch d into the transfer notch c. The driver 6c drives the pallet 6b to rotate, and so on, pushing multiple winding poles 7a into all the transfer notches c of the pallet 6b. Then, the driver 6c drives the tray 6b to rotate until all the winding poles 7a in the tray 6b are aligned with the corresponding pole slots 4b in the die holder 4. Then, the cylinder rod e of the lifting cylinder 6e drives the electromagnetic chuck 6f to move downward. The electromagnetic chuck 6f attracts all the winding poles 7a in the tray 6b. Finally, the lifting cylinder 6e moves horizontally along the bracket 6d to above the die holder 4. The lifting cylinder 6e drives the electromagnetic chuck 6f to move downward again. The electromagnetic chuck 6f puts all the winding poles 7a it carries into the pole slots 4b, thus realizing the transfer of the winding poles on the conveyor belt 5 to the respective pole slots 4b of the die holder 4.

[0048] like Figure 7 As shown, the orthographic projection of the T-shaped winding pole foot 7a can be transformed into an isosceles trapezoid. Therefore, in this embodiment, the transfer notch c is constructed as an isosceles trapezoidal groove structure. Furthermore, the end of the isosceles trapezoidal groove closest to the center of the tray 6b corresponds to the upper base of the trapezoid, and the other end corresponds to the lower base of the trapezoid. That is, the length of the end of the isosceles trapezoidal groove closest to the center of the tray 6b is shorter than the other end.

[0049] For example Figure 7As shown, the conveyor belt 5 has upwardly extending baffles 5a on both sides in the conveying direction. The two sets of baffles 5a can form a strip-shaped groove structure around the conveyor belt 5, which can better convey the winding pole 7a and help push the winding pole 7a from the transition gap d into the transfer gap c. In this embodiment, please refer to... Figure 2 The cylinder seat h of the lifting cylinder 6e is slidably mounted on the inner side of the bracket 6d via the slide rail system g, the sliding direction of the slide rail system g being parallel to the conveying direction of the conveyor belt 5. With this design, when the die holder 4 stops in the extension direction of the conveyor belt 5, the lifting cylinder 6e and the electromagnetic chuck 6f, driven by the slide rail system g, can more conveniently and accurately transfer the winding electrode foot to the die holder 4 on the workstation turntable 3, facilitating automated control. To better control the stopping angle of the tray 6b, and to help the electromagnetic chuck 6f accurately adsorb the winding electrode foot 7a, a position sensor can be installed between the tray 6b and the positioning ring 6a.

[0050] Since the circumferential winding of the ferrite core typically has three specifications of winding leads, with quantities of 5, 2, and 1 respectively, please refer to the following instructions for converting between these three specifications of winding leads. Figure 2 As shown, the number of transfer notches c on pallet 6b next to the first feeding system A is five. Please refer to... Figure 9 As shown, the number of transfer notches c on pallet 6b next to the second feeding system A is two. Please refer to... Figure 10 As shown, the number of transfer gaps c on the pallet 6b next to the third feeding system A is one set.

[0051] Combined with the appendix Figure 8 It can be seen that the core body groove 4a in the die holder 4 has two sets of upwardly extending positioning posts 4c. These positioning posts 4c can match the holes on the core body 7b, allowing the core body 7b to be installed at a certain angle in the core body groove 4a. This ensures that the circumferential riveting groove of the core body 7b is aligned with the pole foot groove 4b, guaranteeing that the riveting punch B1 of the punch press B can successfully rivet the winding pole foot 7a to the side of the core body 7b. Furthermore, to facilitate overall stamping, the lower end of the riveting punch B1 has punch blocks f, the same number as the pole foot groove 4b. The projection of the punch blocks f in the water surface is located within the pole foot groove 4b, meaning that the outline of the punch blocks f is smaller than that of the pole foot groove 4b.

[0052] In this embodiment, the unloading system C can directly adopt a conventional gripper unloading system, or it can adopt the electromagnetic chuck method of the conversion mechanism 6 for unloading.

[0053] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. An automatic material feeding and riveting device for magneto stator cores, characterized in that, The device includes a workstation turntable, on the upper side of which is provided a die holder arranged along its circumference. The die holder is provided with a riveting groove that matches the iron core chip. The riveting groove includes an iron core body groove and a pole foot groove located circumferentially in the iron core body groove. A drive module is configured on the lower side of the workstation turntable for driving the workstation turntable to rotate. A feeding system, a punch press, and an unloading system are arranged sequentially on the outer side of the station turntable. A conversion mechanism is provided between the feeding system and the station turntable to convert the winding poles from the feeding system into the pole slots. The punch press is used to rivet the winding poles in the riveting slots onto the circumference of the iron core body. The unloading system is used to remove the riveted iron core from the die holder. The station turntable is provided with six sets of the die holders in the circumference, and three sets of feeding systems and three sets of conversion mechanisms corresponding to the three sets of feeding systems are arranged on the outer side of the station turntable in the circumference. The feeding system includes a vibratory feeder, a guide trough, and a conveyor belt. The inner wall of the vibratory feeder is provided with a spirally upward vibratory slide. A correction slide is installed on the upper part of the vibratory feeder. The front end of the correction slide is connected to the upper end of the vibratory slide, and the rear end is connected to the guide trough. The lower end of the guide trough is connected to the conveyor belt, and the other end of the conveyor belt is connected to the conversion mechanism. The correction slide consists of a support plate, side baffles, guide rods, and support wires. The support plate has an arc-shaped structure with its upper surface inclined outwards. The side baffles and guide rods are located at the front of the support plate, with the side baffles extending upwards relative to the support plate. The guide rods extend upwards at an incline along the feeding direction of the correction slide. The support wires are connected to the rear end of the support plate and have an arc-shaped structure consistent with the arc of the support plate. There is a gap between the front of the support wires and the support plate in the height direction. The rear parts of both the support wires and the support plate are spirally bent downwards, so that the gap gradually changes from the height direction to the horizontal direction. The winding pole has a T-shaped structure with a wide end and a narrow end. The distance between the side baffles and the guide rods is greater than the thickness of the winding pole plate but less than the length of the wide end. The length of the wide end of the winding pole is greater than the gap. A stepped notch is provided at the inner end of the rear of the support plate. The rear of both the supporting steel wire and the supporting plate has a horizontal extension section. The guide trough is inclined and its upper end is connected to the horizontal extension section. A cover block is provided at the upper end of the guide trough. A guide block is fixed at the upper end of the cover block near the horizontal extension section. The guide block extends beyond the horizontal extension section in the height direction.

2. The automatic feeding and riveting equipment for magneto stator cores according to claim 1, characterized in that: The conversion mechanism includes a positioning ring installed between the feeding system and the workstation turntable, a tray rotatably disposed within the positioning ring, and a driver for driving the tray to rotate. The tray has transfer notches distributed on its circumferential edge, and the positioning ring has a transition notch that docks with the feeding system. A bracket is suspended above the tray, and a lifting cylinder that can move between the tray and the workstation turntable is installed on the inner side of the bracket. An electromagnetic chuck is fixedly connected to the cylinder rod of the lifting cylinder, and the electromagnetic chuck is located above the tray.

3. The automatic feeding and riveting equipment for magneto stator cores according to claim 2, characterized in that: The transfer gap is an isosceles trapezoidal groove structure, with the length of one end near the center of the tray being shorter than the other end.

4. The automatic feeding and riveting equipment for magneto stator cores according to claim 1, characterized in that: The punch press has a riveting punch that can move up and down above the workstation turntable. The lower end of the riveting punch has a punch block that matches the number of the pole foot grooves. The projection of the punch block in the water surface is located in the pole foot groove.

5. The automatic feeding and riveting equipment for magneto stator cores according to claim 1, characterized in that: The iron core body slot is provided with two sets of upward-extending positioning posts.

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