Electromagnetic core manufacturing process and apparatus

Abstract

This application provides a manufacturing process and equipment for electromagnet cores, including a stamping step, a deburring step, a polishing step, an inspection step, and a composite step. The lower die assembly and workpiece pushing assembly in this application facilitate direct screening of workpieces and scrap materials within the stamping equipment, saving space.

Description

Technical Field

[0001] This invention relates to the field of electromagnet core manufacturing, and more specifically, to electromagnet core manufacturing processes and equipment. Background Technology

[0002] The working principle of an AC contactor is to use the combination of electromagnetic force and spring force to achieve the connection and disconnection of contacts. An AC contactor has two working states: de-energized (released state) and energized (operating state). When the attraction coil is energized, the stationary iron core generates electromagnetic attraction, the armature is attracted, and the connecting rod connected to the armature drives the contacts to operate, causing the normally closed contacts to open and the contactor to be in the energized state. When the attraction coil is de-energized, the electromagnetic attraction disappears, the armature reopens, causing the normally open contacts to close, and the contactor is released under the action of the spring, all contacts reset, and the contactor is in the de-energized state.

[0003] The iron core in an AC contactor needs to be stamped into the shape of an iron core using a stamping machine during the production process. Then, the iron core is stacked and combined using a composite machine to form the iron core in the AC contactor.

[0004] The existing stamping equipment used for iron core production has the following shortcomings in actual use:

[0005] Firstly, existing stamping equipment consists of stamping dies, hydraulic mechanisms, and conveying structures. When the stamping die is in operation, its shape must be the same as that of the iron core, so it is often "mountain" shaped. This causes the stamped workpiece to get stuck in the stamping die during the stamping process, preventing the stamping die from effectively stamping and cutting in the next stamping, thus affecting the processing efficiency.

[0006] Secondly, the conveying mechanism of existing stamping equipment is mostly a conveyor belt. The workpieces stamped by the stamping die are mixed with the material, which makes it impossible to quickly screen the workpieces. Screening equipment is needed to screen out the processed workpieces, which increases the overall footprint of the equipment and is not conducive to the construction of the equipment.

[0007] Thirdly, existing stamping dies directly stamp steel strips to form iron cores. However, because the steel strips are transported in a straight line, they cannot be fixed at both ends of the stamping equipment. This results in the steel strips not being properly secured, causing them to move during the stamping process and affecting the final shape of the workpiece, leading to a decrease in the product qualification rate. Therefore, we have made improvements and proposed an electromagnetic core manufacturing process and equipment.

[0008] Therefore, we have made improvements and proposed an electromagnet core manufacturing process and equipment. Summary of the Invention

[0009] The purpose of this invention is to address the problems of existing stamping dies, such as ineffective stamping and cutting during the next stamping, workpieces and materials mixed together, hindering rapid workpiece screening, and steel strip movement affecting the final shape of the workpiece during stamping.

[0010] To achieve the above-mentioned objectives, the present invention provides the following electromagnet core manufacturing equipment to improve the aforementioned problems.

[0011] The application is as follows:

[0012] The manufacturing process of an electromagnet core includes stamping, deburring, polishing, inspection, and composite steps.

[0013] Stamping: The process of stamping steel strips to produce iron core workpieces using electromagnet core manufacturing equipment;

[0014] Deburring: Grinding the edges of the machined iron core workpiece to remove burrs;

[0015] Polishing: The surface of the deburred workpiece is polished to a precision of 0.1µm;

[0016] Inspection: Perform dimensional inspection on the workpiece. The dimensional deviation of the workpiece is ±0.1mm, and the dimensional deviation of the workpiece thickness is ±0.01mm.

[0017] Composite: Using composite equipment, qualified iron cores are stacked to the required number of layers.

[0018] As a preferred technical solution of this application, the workpiece needs to be polished using polishing rollers with a mesh size of 50, 100, 200, 500, 1000 and 1500.

[0019] An electromagnet core manufacturing device includes a lower mold assembly. A hydraulic component is fixedly connected to the bottom of the lower mold assembly, and a stamping component is fixedly connected to the top of the hydraulic component. Workpiece pushing components are fixedly connected to both sides of the lower mold assembly. The lower mold assembly includes a lower mold body. A first limiting plate is fixedly connected to the top of both the front and back sides of the lower mold body. A limiting groove is formed on the front side of the first limiting plate. A workpiece falling groove is formed on the top of the lower mold body. A workpiece discharge groove is formed on the front side of the lower mold body. A receiving box is fixedly connected to the bottom of the front side of the lower mold assembly.

[0020] As a preferred technical solution of this application, the hydraulic component includes a hydraulic cylinder, with hydraulic rods fixedly connected to both sides of the top of the hydraulic cylinder, and a first fixing plate fixedly connected to the top of the hydraulic rods.

[0021] As a preferred technical solution of this application, a second fixing plate is fixedly connected to both the front and back sides of the lower mold body. A bearing is fixedly sleeved on one side of the second fixing plate, a rotating shaft is fixedly sleeved on the inner side of the bearing, a rotating circular plate is fixedly connected to one side of the rotating shaft, a transmission circular plate is fixedly connected to one side of the rotating circular plate, a rotating belt is movably connected to the outer side of the transmission circular plate, a scraper is fixedly connected to one side of the rotating belt, and a servo motor is fixedly connected to one side of the second fixing plate on one side of the front side of the lower mold body.

[0022] As a preferred technical solution of this application, the stamping assembly includes a mold fixing plate, four stamping dies are fixedly connected to the bottom of the mold fixing plate, each stamping die includes a stamping knife, a second limiting plate is fixedly connected to the inner side of the stamping knife, a spring is fixedly connected to the bottom of the mold fixing plate, a third limiting plate is fixedly connected to the bottom of the spring, and an ejector block is fixedly connected to the bottom of the third limiting plate.

[0023] As a preferred technical solution of this application, the inner sides of the two first fixing plates are fixedly connected to the two sides of the mold fixing plate, and the connection position of the first fixing plates and the mold fixing plate is located near the top on both sides of the mold fixing plate.

[0024] As a preferred technical solution of this application, the outer dimension of the top of the stamping knife has a dimensional tolerance of -0.5mm with the dimension of the workpiece drop groove, the outer dimension of the second limiting plate, the dimension of the third limiting plate and the inner dimension of the stamping knife are matched with each other, and the inner dimension of the second limiting plate and the dimension of the ejector block are matched with each other.

[0025] As a preferred technical solution of this application, the distance between the upper and lower sides of the rotating belt is 10 centimeters larger than the distance between the two workpiece discharge slots, and the diameter of the transmission circular plate is 6 centimeters larger than the distance between the two workpiece discharge slots.

[0026] As a preferred technical solution of this application, the scraper is attached to the bottom of the workpiece discharge groove on the front top of the lower mold body, the distance between the two scrapers is half the length of the rotating belt, and the servo motor is connected to the corresponding rotating shaft for transmission.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] In the scheme of this application:

[0029] 1. The stamping components are designed to push the iron core out of the stamping die when it is being stamped out, thus preventing the workpiece from getting stuck in the stamping die and affecting processing efficiency;

[0030] 2. The lower die assembly and workpiece pushing assembly facilitate the direct screening of workpieces and scrap materials within the stamping equipment, saving the equipment's floor space.

[0031] 3. The first limiting plate helps to limit the steel strip and prevent it from shifting during the stamping process, which would affect the product qualification rate. Attached Figure Description

[0032] Figure 1 A flowchart of the electromagnet core manufacturing process provided for this application;

[0033] Figure 2 A schematic diagram of the overall structure of the electromagnet core manufacturing equipment provided in this application;

[0034] Figure 3 A schematic diagram of the lower mold assembly structure of the electromagnet core manufacturing equipment provided in this application;

[0035] Figure 4 A schematic diagram of the hydraulic components of the electromagnet core manufacturing equipment provided in this application;

[0036] Figure 5 A schematic diagram of the stamping assembly structure of the electromagnet core manufacturing equipment provided in this application;

[0037] Figure 6 A schematic diagram of the stamping die structure for the electromagnet core manufacturing equipment provided in this application;

[0038] Figure 7 A schematic diagram of the workpiece pushing assembly structure of the electromagnet core manufacturing equipment provided in this application.

[0039] The image shows:

[0040] 1. Lower mold assembly; 101. Lower mold body; 102. First limiting plate; 103. Limiting groove; 104. Workpiece drop groove; 105. Workpiece discharge groove; 2. Hydraulic assembly; 201. Hydraulic cylinder; 202. Hydraulic rod; 203. First fixing plate; 3. Workpiece pushing assembly; 301. Second fixing plate; 302. Rotating circular plate; 303. Transmission circular plate; 304. Rotating shaft; 305. Servo motor; 306. Bearing; 307. Rotating belt; 308. Scraper; 4. Stamping assembly; 401. Mold fixing plate; 402. Stamping die; 4021. Stamping knife; 4022. Second limiting plate; 4023. Ejector block; 4024. Third limiting plate; 4025. Spring; 5. Receiving box. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] As described in the background art, the stamping die cannot perform effective stamping and cutting in the next stamping, the workpiece stamped by the stamping die is mixed with the material, which makes it impossible to quickly screen the workpiece, and the stamping die can cause the steel strip to move during the stamping process, affecting the final shape of the workpiece.

[0043] To solve this technical problem, the present invention provides an electromagnet core manufacturing process and equipment, which are applied to the stamping manufacturing of electromagnet cores.

[0044] For details, please refer to Figure 1 The manufacturing process of electromagnet cores includes stamping, deburring, polishing, inspection, and composite steps.

[0045] Stamping: The process of stamping steel strips to produce iron core workpieces using electromagnet core manufacturing equipment;

[0046] Deburring: Grinding the edges of the machined iron core workpiece to remove burrs;

[0047] Polishing: The surface of the deburred workpiece is polished to a precision of 0.1µm;

[0048] Inspection: Perform dimensional inspection on the workpiece. The dimensional deviation of the workpiece is ±0.1mm, and the dimensional deviation of the workpiece thickness is ±0.01mm.

[0049] Composite: Using composite equipment, qualified iron cores are stacked to the required number of layers.

[0050] Please refer to Figure 2-3 The electromagnet core manufacturing equipment includes a lower mold assembly 1. A hydraulic assembly 2 is fixedly connected to the bottom of the lower mold assembly 1. A stamping assembly 4 is fixedly connected to the top of the hydraulic assembly 2. Workpiece pushing assemblies 3 are fixedly connected to both sides of the lower mold assembly 1. The lower mold assembly 1 includes a lower mold body 101. A first limiting plate 102 is fixedly connected to the top of both the front and back sides of the lower mold body 101. A limiting groove 103 is opened on the front side of the first limiting plate 102. A workpiece dropping groove 104 is opened on the top of the lower mold body 101. A workpiece discharge groove 105 is opened on the front side of the lower mold body 101. A receiving box 5 is fixedly connected to the bottom of the front side of the lower mold assembly 1.

[0051] The electromagnet core manufacturing equipment provided by the present invention, through the setting of the first limiting plate 102, helps to limit the steel strip and avoid the phenomenon that the steel strip deviates during the stamping process, affecting the product qualification rate.

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0053] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0054] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0055] Example 1

[0056] Please refer to Figure 4 An electromagnet core manufacturing device includes a hydraulic component 2 comprising a hydraulic cylinder 201, with hydraulic rods 202 fixedly connected to both sides of the top of the hydraulic cylinder 201, and a first fixing plate 203 fixedly connected to the top of the hydraulic rods 202. The steel strip is moved by a steel strip moving device, which in turn causes the hydraulic rods 202 to retract through the operation of the hydraulic cylinder 201, and then causes the stamping component 4 to descend through the first fixing plate 203 to stamp the steel strip.

[0057] Please refer to Figure 7 An electromagnet core manufacturing device includes a second fixing plate 301 fixedly connected to both the front and back sides of the lower mold body 101. A bearing 306 is fixedly sleeved on one side of the second fixing plate 301. A rotating shaft 304 is fixedly sleeved on the inner side of the bearing 306. A rotating circular plate 302 is fixedly connected to one side of the rotating shaft 304. A transmission circular plate 303 is fixedly connected to one side of the rotating circular plate 302. A rotating belt 307 is movably connected to the outer side of the transmission circular plate 303. A scraper 308 is fixedly connected to one side of the rotating belt 307. The second fixing plate 301 is located on the front side of one side of the lower mold body 101. A servo motor 305 is fixedly connected to one side of 01. The servo motor 305 drives the rotating shaft 304 to rotate, which in turn drives the rotating disc 302 and the transmission disc 303 to rotate. Under the action of friction, the rotating belt 307 rotates and drives the scraper 308 to move, scraping the workpiece located at the bottom of the workpiece discharge groove 105 on the front top of the lower mold body 101 into the receiving box 5 for collection. Through the set lower mold assembly 1 and workpiece pushing assembly 3, it is beneficial to directly complete the screening of workpieces and waste materials in the stamping equipment, saving the equipment's floor space.

[0058] Example 2

[0059] The electromagnet core manufacturing equipment provided in Example 1 is further optimized, specifically, as follows: Figure 5-6 As shown, the stamping assembly 4 includes a mold fixing plate 401. Four stamping dies 402 are fixedly connected to the bottom of the mold fixing plate 401. Each stamping die 402 includes a stamping cutter 4021. A second limiting plate 4022 is fixedly connected to the inner side of the stamping cutter 4021. A spring 4025 is fixedly connected to the bottom of the mold fixing plate 401. A third limiting plate 4024 is fixedly connected to the bottom of the spring 4025. An ejector block 4023 is fixedly connected to the bottom of the third limiting plate 4024. During the descent of the stamping assembly 4, the ejector block 4023 first contacts the steel strip. Under the action of the downward pressure, the spring 4022... 25 begins to contract, and then the third limiting plate 4024 and the ejector block 4023 rise. During the rising process, the bottom of the stamping knife 4021 begins to contact the steel strip and perform stamping. Then, after the stamping knife 4021 penetrates the steel strip, under the action of the spring force of the spring 4025, the third limiting plate 4024 and the ejector block 4023 descend and push the processed workpiece out and fall to the bottom of the workpiece discharge groove 105 on the front top of the lower mold body 101. The stamping assembly 4 is set to help push the iron core out of the stamping mold when stamping out the iron core, and avoid the workpiece getting stuck in the stamping mold, which would affect the processing efficiency.

[0060] Furthermore, such as Figure 2 As shown, the inner sides of the two first fixing plates 203 are fixedly connected to the two sides of the mold fixing plate 401. The first fixing plates 203 are connected to the mold fixing plate 401 at the top of the mold fixing plate 401 on both sides. The first fixing plates 203 are used to drive the stamping assembly 4 to move up and down.

[0061] Example 3

[0062] The electromagnet core manufacturing equipment provided in Example 1 or 2 is further optimized, specifically, as follows: Figure 6 As shown, the outer dimension of the top of the stamping cutter 4021 has a dimensional tolerance of -0.5mm with the dimension of the workpiece drop groove 104. The outer dimension of the second limiting plate 4022 and the dimension of the third limiting plate 4024 are matched with the inner dimension of the stamping cutter 4021. The inner dimension of the second limiting plate 4022 is matched with the dimension of the ejector block 4023, so that the ejector block 4023 can eject the workpiece.

[0063] Furthermore, such as Figure 2-7 As shown, the distance between the upper and lower sides of the rotating belt 307 is 10 centimeters larger than the distance between the two workpiece discharge grooves 105, and the diameter of the transmission circular plate 303 is 6 centimeters larger than the distance between the two workpiece discharge grooves 105, so that the rotating circular plate 302 and the transmission circular plate 303 can drive the rotating belt 307 to rotate.

[0064] Furthermore, such as Figure 2-7As shown, the scraper 308 is attached to the bottom of the workpiece discharge groove 105 on the front top of the lower mold body 101. The distance between the two scrapers 308 is half the length of the rotating belt 307. The servo motor 305 is connected to the corresponding rotating shaft 304 for transmission, so that the scraper 308 can scrape the workpiece to the inside of the receiving box 5.

[0065] The process of using the electromagnet core manufacturing equipment provided by this invention is as follows:

[0066] The steel strip to be processed is passed through the limiting grooves 103 on the two first limiting plates 102. Then, the steel strip is moved by the steel strip moving device. Subsequently, the hydraulic cylinder 201 works to drive the hydraulic rod 202 to retract. Then, the first fixed plate 203 drives the stamping assembly 4 to descend and stamp the steel strip. During the descent of the stamping assembly 4, the ejector block 4023 first contacts the steel strip. Under the action of the downward pressure, the spring 4025 begins to retract. Then, the third limiting plate 4024 and the ejector block 4023 rise. During the rise, the bottom of the stamping knife 4021 begins to contact the steel strip and stamp. Then, after the stamping knife 4021 penetrates the steel strip, the third limiting plate 4024 is pushed back by the spring force of the spring 4025. 4. The ejector block 4023 descends to push the processed workpiece down to the bottom of the workpiece discharge groove 105 on the front top of the lower mold body 101. At the same time, the servo motor 305 drives the rotating shaft 304 to rotate, which in turn drives the rotating circular plate 302 and the transmission circular plate 303 to rotate. Under the action of friction, the rotating belt 307 rotates and drives the scraper 308 to move, scraping the workpiece located at the bottom of the workpiece discharge groove 105 on the front top of the lower mold body 101 into the receiving box 5 for collection. After the stamping assembly 4 completes one workpiece processing, the hydraulic cylinder 201 drives the hydraulic rod 202 to extend and drive the stamping assembly 4 back to its original position. At the same time, the steel strip moving device drives the steel strip to move and then perform the next processing.

[0067] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. Electromagnetic core manufacturing equipment, applied to the electromagnetic core manufacturing process, characterized in that, The assembly includes a lower mold assembly (1), a hydraulic assembly (2) is fixedly connected to the bottom of the lower mold assembly (1), a stamping assembly (4) is fixedly connected to the top of the hydraulic assembly (2), and workpiece pushing assemblies (3) are fixedly connected to both sides of the lower mold assembly (1). The lower mold assembly (1) includes a lower mold body (101), and a first limiting plate (102) is fixedly connected to the top of both the front and back sides of the lower mold body (101). A limiting groove (103) is opened on the front side of the first limiting plate (102), a workpiece falling groove (104) is opened on the top of the lower mold body (101), a workpiece discharge groove (105) is opened on the front side of the lower mold body (101), and a receiving box (5) is fixedly connected to the bottom of the front side of the lower mold assembly (1). The lower mold body (101) has a second fixing plate (301) fixedly connected to both the front and back sides. A bearing (306) is fixedly sleeved on one side of the second fixing plate (301). A rotating shaft (304) is fixedly sleeved on the inner side of the bearing (306). A rotating circular plate (302) is fixedly connected to one side of the rotating shaft (304). A transmission circular plate (303) is fixedly connected to one side of the rotating circular plate (302). A rotating belt (307) is movably connected to the outer side of the transmission circular plate (303). A scraper (308) is fixedly connected to one side of the rotating belt (307). A servo motor (305) is fixedly connected to one side of the second fixing plate (301) on the front side of the lower mold body (101). The stamping assembly (4) includes a mold fixing plate (401), and four stamping dies (402) are fixedly connected to the bottom of the mold fixing plate (401). Each stamping die (402) includes a stamping knife (4021), and a second limiting plate (4022) is fixedly connected to the inner side of the stamping knife (4021). A spring (4025) is fixedly connected to the bottom of the mold fixing plate (401), and a third limiting plate (4024) is fixedly connected to the bottom of the spring (4025). An ejector block (4023) is fixedly connected to the bottom of the third limiting plate (4024). The internal dimensions of the second limiting plate (4022) and the dimensions of the ejector block (4023) are matched to each other, so that the ejector block (4023) can eject the workpiece. The manufacturing process of an electromagnet core includes stamping, deburring, polishing, inspection, and composite steps. Stamping: The process of stamping steel strips to produce iron core workpieces using electromagnet core manufacturing equipment; Deburring: Grinding the edges of the machined iron core workpiece to remove burrs; Polishing: The surface of the deburred workpiece is polished to a precision of 0.1µm; Inspection: Perform dimensional inspection on the workpiece; the dimensional deviation of the workpiece thickness is ±0.01mm. Composite: Using composite equipment to stack qualified iron cores to the required number of layers; When polishing workpieces, grinding rollers with grits of 50, 100, 200, 500, 1000, and 1500 mesh should be used.

2. The electromagnet core manufacturing equipment according to claim 1, characterized in that, The hydraulic assembly (2) includes a hydraulic cylinder (201), and hydraulic rods (202) are fixedly connected to both sides of the top of the hydraulic cylinder (201). A first fixing plate (203) is fixedly connected to the top of the hydraulic rods (202).

3. The electromagnet core manufacturing equipment according to claim 2, characterized in that, The inner sides of the two first fixing plates (203) are fixedly connected to the two sides of the mold fixing plate (401), and the connection position of the first fixing plate (203) and the mold fixing plate (401) is located near the top on both sides of the mold fixing plate (401).

4. The electromagnet core manufacturing equipment according to claim 1, characterized in that, The outer dimension of the top of the stamping cutter (4021) has a dimensional tolerance of -0.5mm with the dimension of the workpiece drop groove (104). The outer dimension of the second limiting plate (4022), the dimension of the third limiting plate (4024), and the inner dimension of the stamping cutter (4021) are matched with each other. The inner dimension of the second limiting plate (4022) is matched with the dimension of the ejector block (4023).

5. The electromagnet core manufacturing equipment according to claim 1, characterized in that, The distance between the upper and lower sides of the rotating belt (307) is 10 centimeters greater than the distance between the two workpiece discharge slots (105), and the diameter of the transmission circular plate (303) is 6 centimeters greater than the distance between the two workpiece discharge slots (105).

6. The electromagnet core manufacturing equipment according to claim 1, characterized in that, The scraper (308) fits against the bottom of the workpiece discharge groove (105) on the front top of the lower mold body (101). The distance between the two scrapers (308) is half the length of the rotating belt (307). The servo motor (305) is connected to its corresponding rotating shaft (304) for transmission.

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