Diesel generator stator core punching sheet forming device and method

Abstract

The invention belongs to the technical field of diesel generator stators, and particularly relates to a diesel generator stator core punching sheet forming device and method.The device comprises a material carrying assembly, an auxiliary material transferring assembly, a punching assembly and a material receiving assembly, and the punching assembly is arranged above the material carrying assembly; an auxiliary material transferring assembly and a material receiving assembly are sequentially arranged at the position, located below the stamping assembly, of the material carrying assembly. Continuous step-by-step stamping can be carried out on the rectangular silicon steel raw material sheet, and the overall stamping difficulty is reduced. After stamping, the stator iron core punching sheets can be stacked and welded into the stator iron core in time, the opening belt is used as a welding material in the welding process, the welding seam structure and performance of the same material are consistent with those of a punching sheet base body, the problems of interface reaction, middle layers or inclusions and the like do not exist, and good connection quality and welding stability can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of diesel generator stators, and in particular relates to a diesel generator stator iron core punching sheet forming device and method. Background Art

[0002] The stator core is the main part of the diesel generator stator, which is composed of multiple stator laminations stacked together. These laminations are precisely formed and stacked to form a complete stator core, which provides the necessary magnetic flux for the generator. The material and structure of the stator core laminations have a direct impact on the performance and efficiency of the diesel generator. Silicon steel sheets are often selected as the material for stator core laminations due to their good magnetic conductivity and reduced induction loss. Reasonable selection of the thickness and silicon content of the silicon steel sheets, as well as optimization of the structural design of the laminations (such as slot width, number of slots, etc.) can improve the energy conversion efficiency of the motor and reduce energy loss. The stator core laminations play the role of isolation and fixation in the diesel generator, ensuring that the relative position between the stator and the rotor does not change. This helps to maintain the stability and reliability of the generator operation and avoid failures caused by loose components or position changes. The stator core punching is a key component for conducting and regulating the magnetic field. During the operation of the generator, the stator core punching can guide the magnetic field lines to be evenly distributed in the stator, thereby ensuring that the current generates a stable electromagnetic force in the stator winding, driving the rotor to rotate and realizing the conversion of electrical energy into mechanical energy.

[0003] The traditional diesel generator stator core punching forming device was found to have shortcomings during use. First, it cannot continuously and step-by-step punch the silicon steel rectangular raw material sheet. The overall punching is not only difficult, but the quality of the punching sheet cannot be guaranteed. Second, it cannot stack the punching sheets and weld them into the stator core in time after punching. Therefore, it is necessary to optimize and improve the traditional diesel generator stator core punching forming device. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems existing in the conventional technology and to provide a device and method for forming a stator core sheet of a diesel generator.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A diesel generator stator core punching sheet forming device comprises a material loading assembly, an auxiliary material transfer assembly, a stamping assembly and a material receiving assembly, wherein a stamping assembly is arranged above the material loading assembly, and an auxiliary material transfer assembly and a material receiving assembly are arranged in sequence below the material loading assembly; the material loading assembly is used to place silicon steel rectangular raw material sheets in batches and drive them into a stamping station, the stamping assembly can perform three-step stamping on the silicon steel rectangular raw material sheets, the auxiliary material transfer assembly can sequentially transfer the circular auxiliary material blocks produced by the first stamping and the annular auxiliary material blocks and the opening band produced by the second stamping outward, a protrusion matching the opening in the opening band is arranged at the outer edge of the circular auxiliary material block, and the material receiving assembly can continuously receive the stator core punching sheets formed by the third stamping.

[0007] Furthermore, in the above-mentioned diesel generator stator core punching sheet forming device, the stator core punching sheet includes an annular sheet body, and the inner hole of the annular sheet body is evenly distributed with stator slots along the circumferential direction.

[0008] Furthermore, in the above-mentioned diesel generator stator core punching sheet forming device, the loading assembly includes a first substrate, a first motor, a first turntable, a pressure column and a pressure block, the first substrate is mounted with a first motor, the output end of the first motor is mounted with a first turntable, the first turntable is circumferentially provided with a plurality of positioning through grooves, the positioning through grooves are divided into an upper groove cavity located in the upper layer and matching the shape of the silicon steel rectangular raw material sheet, and a lower groove cavity located in the lower layer and matching the shape of the stator core punching sheet, and the pressure block is provided with an avoidance hole matching the shape of the stator core punching sheet.

[0009] Furthermore, in the above-mentioned diesel generator stator core punching forming device, the auxiliary material transfer assembly includes a second motor, a support shaft and a support plate, the second motor is installed at the end of the pressure block, the output end of the second motor is connected to the support shaft, the support shaft is movably supported by the pressure block and the first base plate, and a support plate is fixed to the outside of the support shaft.

[0010] Furthermore, in the above-mentioned diesel generator stator core punching forming device, the stamping assembly includes a base, a first vertical push rod, a first punch block, a second vertical push rod, a first support frame, a second punch block, a third vertical push rod, a second support frame and a third punch block. The base is sequentially installed with the first vertical push rod, the second vertical push rod and the third vertical push rod from the inside to the outside. The movable end of the first vertical push rod is installed with a first punch block that matches the shape of the outer edge of the circular auxiliary block. The movable end of the second vertical push rod is installed with a second punch block that matches the shape of the inner and outer edges of the annular auxiliary block via the first support frame. The movable end of the third vertical push rod is installed with a second punch block that matches the shape of the outer edge of the stator core punching sheet via the second support frame.

[0011] Furthermore, in the above-mentioned diesel generator stator core punching sheet forming device, the first bracket is provided with a first through hole for avoiding the first vertical push rod, and the second bracket is provided with a second through hole for avoiding the second vertical push rod.

[0012] Furthermore, in the above-mentioned diesel generator stator core punching forming device, the material receiving assembly includes a second base plate, a fourth vertical push rod, a movable plate, a positioning convex tube and an electric heating rod. The second base plate is equipped with a fourth vertical push rod, and the movable end of the fourth vertical push rod is equipped with a circle of positioning convex tubes through the movable plate. The positioning convex tubes correspond to the positions of the stator slots in the stator core punching sheets one by one. An electric heating rod is embedded in the interior of each of the positioning convex tubes. The positioning convex tubes are made of heat-conducting metal material, and the terminal of the electric heating rod is led out from the bottom side of the movable plate.

[0013] The present invention also provides a method for forming a diesel generator stator core punching sheet, which is implemented based on the above-mentioned diesel generator stator core punching sheet forming device and comprises the following steps:

[0014] S1. Place the rectangular silicon steel raw material sheet in the positioning slot of the loading assembly using a loading and unloading manipulator;

[0015] S2, the first vertical push rod in the stamping assembly is started, and the silicon steel rectangular raw material sheet entering the stamping station is stamped for the first time. The silicon steel rectangular raw material sheet is stamped for the first time to form a first circular punching hole, and the edge of the first circular punching hole is sunken inward to form a fracture. The circular auxiliary material block produced by the stamping falls on the support plate of the auxiliary material transfer assembly. The second motor in the auxiliary material transfer assembly drives the support plate and the circular auxiliary material block to transfer outward through the support shaft, and the transfer manipulator is used to grab and transfer the circular auxiliary material block, and the support plate is reset;

[0016] S3, the second vertical push rod in the stamping assembly is started, and the silicon steel rectangular raw material sheet entering the stamping station is stamped for the second time. The silicon steel rectangular raw material sheet is stamped to form a quasi-annular punching hole after the second stamping. The edge of the quasi-annular punching hole is concave inward to form a groove that matches the stator slot. The quasi-annular auxiliary material block and the open belt produced by the stamping fall on the support plate of the auxiliary material transfer assembly. The second motor in the auxiliary material transfer assembly drives the support plate and the quasi-annular auxiliary material block and the open belt to transfer outward through the support shaft, and the transfer manipulator is used to grab and transfer the quasi-annular auxiliary material block;

[0017] S4, the fourth vertical push rod in the material receiving assembly is started, and the fourth vertical push rod drives the movable plate and the positioning convex tube to move upward; the third vertical push rod in the stamping assembly is started, and the silicon steel rectangular raw material sheet entering the stamping station is stamped for the third time, and the silicon steel rectangular raw material sheet is stamped for the third time to form a second circular punching hole, and the stator core punching sheet produced by the stamping falls on the outside of the positioning convex tube of the material receiving assembly, and the fourth vertical push rod in the material receiving assembly is retracted;

[0018] S5. Repeat steps S1-S3 until the material receiving assembly receives a set number of stator core punching sheets; use the cutting assembly to cut the outer edges of the stacked stator core punching sheets to form welding cutting seams; before cutting, use the electric heating rod of the material receiving assembly to preheat the stator core punching sheets; after cutting, use the open strip as welding material to fill the welding cutting seams, and perform laser welding reinforcement operations.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention provides a diesel generator stator core punching sheet forming device, which is mainly composed of a loading component, an auxiliary material transfer component, a stamping component and a receiving component. The loading component is used to place silicon steel rectangular raw material sheets in batches and drive them into a stamping station. The stamping component is used to stamp the silicon steel rectangular raw material sheets three times in steps. The auxiliary material transfer component is used to transfer the circular auxiliary material blocks produced by the first stamping and the annular auxiliary material blocks and opening bands produced by the second stamping outward in sequence. The receiving component is used to continuously receive the stator core punching sheets formed by the third stamping. In this way, the silicon steel rectangular raw material sheets can be stamped continuously in steps, reducing the difficulty of the overall stamping.

[0021] 2. The present invention can timely stack and weld the stator core sheets into a stator core after stamping. The open strip is used as welding material during the welding process. The weld structure and performance of the same material are consistent with the sheet matrix. There is no interface reaction, intermediate layer or inclusions, etc., which can ensure good connection quality and welding stability.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the forming principle of the stator core punching sheet in the present invention;

[0026] Figure 3 It is a structural schematic diagram of the material loading assembly in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the auxiliary material transfer assembly in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the stamping assembly in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the first punching mechanism in the present invention;

[0030] Figure 7 It is a structural schematic diagram of the second punching mechanism in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the third punching mechanism in the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the first, second and third punch blocks in the present invention;

[0033] Fig.10 It is a schematic diagram of the main structure of the material receiving assembly in the present invention;

[0034] Fig.11 It is a schematic diagram of the top view of the material receiving assembly in the present invention;

[0035] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0036] 1-carrying assembly, 101-first substrate, 102-first motor, 103-first turntable, 104-pressure column, 105-pressure block;

[0037] 2- auxiliary material transfer assembly, 201- second motor, 202- support shaft, 203- support plate;

[0038] 3-stamping assembly, 301-base, 302-first vertical push rod, 303-first punch block, 304-fracture forming protrusion, 305-second vertical push rod, 306-first support frame, 307-second punch block, 308-third vertical push rod, 309-second support frame, 310-third punch block;

[0039] 4-material receiving assembly, 401-second base plate, 402-fourth vertical push rod, 403-movable plate, 404-positioning convex tube, 405-electric heating rod;

[0040] 5- stator core punching sheet;

[0041] 6- Silicon steel rectangular raw sheet;

[0042] 7-round auxiliary material block;

[0043] 8-type annular auxiliary material blocks;

[0044] 9- Opening belt. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 1-Figure 2 As shown, this embodiment is a diesel generator stator core punching sheet forming device, including a material carrier assembly 1, an auxiliary material transfer assembly 2, a stamping assembly 3 and a material receiving assembly 4. The stamping assembly 3 is arranged above the material carrier assembly 1, and the auxiliary material transfer assembly 2 and the material receiving assembly 4 are arranged in sequence below the material carrier assembly 1 located at the stamping assembly 3; the material carrier assembly 1 is used to place silicon steel rectangular raw material sheets 6 in batches and drive them into the stamping station, and the stamping assembly 3 can perform three-step stamping on the silicon steel rectangular raw material sheets 6, and the auxiliary material transfer assembly 2 can sequentially transfer the circular auxiliary material block 7 produced by the first stamping and the annular auxiliary material block 8 and the opening belt 9 produced by the second stamping outward, and the outer edge of the circular auxiliary material block 7 is provided with a protrusion that matches the opening in the opening belt 9, and the material receiving assembly 4 can continuously receive the stator core punching sheet 5 formed by the third stamping.

[0047] In this embodiment, the stator core punching sheet 5 comprises an annular sheet body, and the inner hole of the annular sheet body is uniformly provided with stator slots along the circumferential direction.

[0048] like Figure 3 As shown, the loading assembly 1 includes a first substrate 101, a first motor 102, a first turntable 103, a pressure column 104 and a pressure block 105. The first motor 102 is installed on the first substrate 101, and the first turntable 103 is installed on the output end of the first motor 102. The first turntable 103 is provided with a plurality of positioning grooves along the circumferential direction. The positioning grooves are divided into an upper groove cavity located in the upper layer and matched with the shape of the silicon steel rectangular raw material sheet 6, and a lower groove cavity located in the lower layer and matched with the shape of the stator core punching sheet 5. The pressure block 105 is provided with an avoidance hole matched with the shape of the stator core punching sheet 5, and the first substrate 101 is provided with an avoidance through hole.

[0049] like Figure 4 As shown, the auxiliary material transfer assembly 2 includes a second motor 201, a support shaft 202 and a support plate 203. The second motor 201 is installed at the end of the pressure block 105. The output end of the second motor 201 is connected to the support shaft 202. The support shaft 202 is movably supported by the pressure block 105 and the first substrate 101. A support plate 203 is fixed to the outside of the support shaft 202.

[0050] like Figure 5-Figure 9As shown, the stamping assembly 3 includes a base 301, a first vertical push rod 302, a first punch 303, a second vertical push rod 305, a first bracket 306, a second punch 307, a third vertical push rod 308, a second bracket 309 and a third punch 310. The base 301 is sequentially installed with the first vertical push rod 302, the second vertical push rod 305 and the third vertical push rod 308 from the inside to the outside, the movable end of the first vertical push rod 302 is installed with the first punch 303 matching the shape of the outer edge of the circular auxiliary material block 7, and the outer edge of the first punch 303 is formed with a fracture forming protrusion 304, the movable end of the second vertical push rod 305 is installed with the second punch 307 matching the shape of the inner and outer edges of the quasi-annular auxiliary material block 8 through the first bracket 306, and the movable end of the third vertical push rod 306 is installed with the second punch 310 matching the shape of the outer edge of the stator core punching sheet 5 through the second bracket 309.

[0051] In this embodiment, the first vertical push rod 302 and the first punch 303 constitute a first stamping mechanism, the second vertical push rod 305, the first support frame 306 and the second punch 307 constitute a second stamping mechanism, and the third vertical push rod 308, the second support frame 309 and the third punch 310 constitute a third stamping mechanism.

[0052] In this embodiment, a first through hole is formed on the first support frame 306 to avoid the first vertical push rod 302 , and a second through hole is formed on the second support frame 309 to avoid the second vertical push rod 305 .

[0053] like Figure 10-11 As shown, the material receiving assembly 4 includes a second base plate 401, a fourth vertical push rod 402, a movable plate 403, a positioning convex tube 404 and an electric heating rod 405. The fourth vertical push rod 402 is installed on the second base plate 401, and a circle of positioning convex tubes 404 are installed on the movable end of the fourth vertical push rod 402 through the movable plate 403. The positioning convex tubes 404 correspond to the positions of the stator slots in the stator core punching sheet 5. The electric heating rod 405 is embedded and installed inside each positioning convex tube 404. The positioning convex tube 404 is made of a metal material that can conduct heat, and the terminal of the electric heating rod 405 is led out from the bottom side of the movable plate 403.

[0054] This embodiment also provides a method for forming a diesel generator stator core punching sheet, comprising the following steps:

[0055] S1, using a loading and unloading robot to place a silicon steel rectangular raw material sheet 6 in a positioning slot of a loading assembly 1;

[0056] S2, the first vertical push rod 302 in the stamping assembly 3 is started, and the silicon steel rectangular raw material sheet 6 entering the stamping station is stamped for the first time. The silicon steel rectangular raw material sheet 6 is stamped to form a first circular punching hole 601. The edge of the first circular punching hole 601 is recessed inward to form a fracture 602. The circular auxiliary material block 7 produced by the stamping falls on the support plate 203 of the auxiliary material transfer assembly 2. The second motor 201 in the auxiliary material transfer assembly 2 drives the support plate 203 and the circular auxiliary material block 7 to transfer outward through the support shaft 202. The transfer manipulator is used to grab and transfer the circular auxiliary material block 7, and the support plate 203 is reset;

[0057] S3, the second vertical push rod 305 in the stamping assembly 3 is started, and the silicon steel rectangular raw material sheet 6 entering the stamping station is stamped for the second time. The silicon steel rectangular raw material sheet 6 is stamped to form a quasi-annular punching hole 603 after the second stamping. The edge of the quasi-annular punching hole 603 is recessed inward to form a groove that matches the stator slot. The quasi-annular auxiliary material block 8 and the open belt 9 produced by the stamping fall on the support plate 203 of the auxiliary material transfer assembly 2. The second motor 201 in the auxiliary material transfer assembly 2 drives the support plate 203 and the quasi-annular auxiliary material block 8 and the open belt 9 to transfer outward through the support shaft 202, and the quasi-annular auxiliary material block 8 is grasped and transferred by the transfer manipulator;

[0058] S4, the fourth vertical push rod 402 in the material receiving assembly 4 is started, and the fourth vertical push rod 402 drives the movable plate 403 and the positioning convex tube 404 to move upward; the third vertical push rod 308 in the stamping assembly 3 is started, and the silicon steel rectangular raw material sheet 6 entering the stamping station is stamped for the third time, and the silicon steel rectangular raw material sheet 6 is stamped for the third time to form a second circular punching hole 604, and the stator core punching sheet 5 produced by the stamping falls on the outside of the positioning convex tube 404 of the material receiving assembly 4, and the fourth vertical push rod 402 in the material receiving assembly 4 is retracted;

[0059] S5. Repeat steps S1-S3 until the receiving assembly 4 receives a set number of stator core punching sheets 5; a plurality of cutting assemblies are circumferentially arranged at the periphery of the receiving assembly 4, and the outer edges of the stacked stator core punching sheets are cut by the cutting assemblies to form welding cutting seams; before cutting, the stator core punching sheets 5 are preheated by the electric heating rod 405 of the receiving assembly 4; after cutting, the open belt 9 is used as a welding material to fill the welding cutting seams, and laser welding reinforcement operations are performed.

[0060] The present invention can realize continuous step-by-step stamping of silicon steel rectangular raw material sheets, reducing the difficulty of overall stamping. After stamping, the stator core punching sheets can be stacked and welded into a stator core in a timely manner. The open strip is used as a welding material during the welding process. The weld structure and performance of the same material are consistent with the punching sheet matrix, and there is no interface reaction, intermediate layer or inclusions, etc., which can ensure good connection quality and welding stability.

[0061] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A diesel generator stator core punching forming device, characterized in that: It includes a loading component, an auxiliary material transfer component, a stamping component and a material receiving component. The stamping component is arranged above the loading component, and the auxiliary material transfer component and the material receiving component are arranged in sequence below the loading component; the loading component is used to place silicon steel rectangular raw material sheets in batches and drive them into the stamping station, the stamping component can perform three-step stamping on the silicon steel rectangular raw material sheets, the auxiliary material transfer component can transfer the circular auxiliary material blocks produced by the first stamping and the annular auxiliary material blocks and the opening belt produced by the second stamping outward in sequence, the outer edge of the circular auxiliary material block is provided with a protrusion that matches the opening in the opening belt, and the material receiving component can continuously receive the stator core punching sheets formed by the third stamping.

2. The diesel generator stator core punching forming device according to claim 1, characterized in that: The stator core punching sheet comprises an annular sheet body, and the inner hole of the annular sheet body is uniformly provided with stator slots along the circumferential direction.

3. The diesel generator stator core punching forming device according to claim 2, characterized in that: The loading assembly includes a first substrate, a first motor, a first turntable, a pressure-bearing column and a pressure block. The first substrate is equipped with a first motor. The output end of the first motor is equipped with a first turntable. The first turntable is provided with a plurality of positioning grooves along the circumferential direction. The positioning grooves are divided into an upper groove cavity located in the upper layer and matched with the shape of the silicon steel rectangular raw material sheet, and a lower groove cavity located in the lower layer and matched with the shape of the stator core punching sheet. The pressure block is provided with an avoidance hole matched with the shape of the stator core punching sheet.

4. The diesel generator stator core punching forming device according to claim 3, characterized in that: The auxiliary material transfer assembly includes a second motor, a support shaft and a support plate. The second motor is installed at the end of the pressure block. The output end of the second motor is connected to the support shaft. The support shaft is movably supported by the pressure block and the first substrate. A support plate is fixed to the outside of the support shaft.

5. The diesel generator stator core punching forming device according to claim 4, characterized in that: The stamping assembly includes a base, a first vertical push rod, a first punch block, a second vertical push rod, a first support frame, a second punch block, a third vertical push rod, a second support frame and a third punch block. The base is sequentially installed with the first vertical push rod, the second vertical push rod and the third vertical push rod from the inside to the outside. The movable end of the first vertical push rod is installed with a first punch block that matches the shape of the outer edge of the circular auxiliary block. The movable end of the second vertical push rod is installed with a second punch block that matches the shape of the inner and outer edges of the annular auxiliary block via the first support frame. The movable end of the third vertical push rod is installed with a second punch block that matches the shape of the outer edge of the stator core punching sheet via the second support frame.

6. The diesel generator stator core punching forming device according to claim 5, characterized in that: The first support frame is provided with a first through hole for avoiding the first vertical push rod, and the second support frame is provided with a second through hole for avoiding the second vertical push rod.

7. The diesel generator stator core punching sheet forming device according to claim 6, characterized in that: The material receiving assembly includes a second base plate, a fourth vertical push rod, a movable plate, a positioning convex tube and an electric heating rod. The fourth vertical push rod is installed on the second base plate. The movable end of the fourth vertical push rod is installed with a circle of positioning convex tubes through the movable plate. The positioning convex tubes correspond to the positions of the stator slots in the stator core punching sheets one by one. An electric heating rod is embedded in the interior of each of the positioning convex tubes. The positioning convex tubes are made of heat-conducting metal material, and the terminal of the electric heating rod is led out from the bottom side of the movable plate.

8. A method for forming a stator core sheet of a diesel generator, which is implemented based on the stator core sheet forming device of the diesel generator according to claim 7, characterized in that: The steps include: S1. Place the rectangular silicon steel raw material sheet in the positioning slot of the loading assembly using a loading and unloading manipulator; S2, the first vertical push rod in the stamping assembly is started, and the silicon steel rectangular raw material sheet entering the stamping station is stamped for the first time. The silicon steel rectangular raw material sheet is stamped for the first time to form a first circular punching hole, and the edge of the first circular punching hole is sunken inward to form a fracture. The circular auxiliary material block produced by the stamping falls on the support plate of the auxiliary material transfer assembly. The second motor in the auxiliary material transfer assembly drives the support plate and the circular auxiliary material block to transfer outward through the support shaft, and the transfer manipulator is used to grab and transfer the circular auxiliary material block, and the support plate is reset; S3, the second vertical push rod in the stamping assembly is started, and the silicon steel rectangular raw material sheet entering the stamping station is stamped for the second time. The silicon steel rectangular raw material sheet is stamped to form a quasi-annular punching hole after the second stamping. The edge of the quasi-annular punching hole is concave inward to form a groove that matches the stator slot. The quasi-annular auxiliary material block and the open belt produced by the stamping fall on the support plate of the auxiliary material transfer assembly. The second motor in the auxiliary material transfer assembly drives the support plate and the quasi-annular auxiliary material block and the open belt to transfer outward through the support shaft, and the transfer manipulator is used to grab and transfer the quasi-annular auxiliary material block; S4, the fourth vertical push rod in the material receiving assembly is started, and the fourth vertical push rod drives the movable plate and the positioning convex tube to move upward; the third vertical push rod in the stamping assembly is started, and the silicon steel rectangular raw material sheet entering the stamping station is stamped for the third time, and the silicon steel rectangular raw material sheet is stamped for the third time to form a second circular punching hole, and the stator core punching sheet produced by the stamping falls on the outside of the positioning convex tube of the material receiving assembly, and the fourth vertical push rod in the material receiving assembly is retracted; S5. Repeat steps S1-S3 until the material receiving assembly receives a set number of stator core punching sheets; use the cutting assembly to cut the outer edges of the stacked stator core punching sheets to form welding cutting seams; before cutting, use the electric heating rod of the material receiving assembly to preheat the stator core punching sheets; after cutting, use the open strip as welding material to fill the welding cutting seams, and perform laser welding reinforcement operations.

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