Automatic equipment applied to tin immersion and resistance test of motor coil

Abstract

The utility model discloses automatic equipment applied to tin immersion and resistance testing of a motor coil, which is characterized in that during working, a worker or a feeding mechanism places a stator core on a positioning jig at a feeding station for clamping and positioning; then, a rotating disc driving mechanism drives the rotating disc to rotate relative to the workbench so as to enable the positioning jigs of the feeding station, the tin immersion station and the resistance testing station to synchronously move to the corresponding next station, and at the moment, the tin immersion mechanism carries out tin immersion operation on the lead ends of the stator iron cores at the tin immersion station; meanwhile, the resistance testing mechanism carries out resistance testing operation on a coil winding of the stator iron core at the resistance testing station, and finally, a worker or a discharging device unloads the stator iron core subjected to tin immersion and resistance testing operation at the discharging station from the positioning jig. And the tin immersion efficiency and the resistance test efficiency are high.

Description

[Technical field]

[0001] The utility model relates to an automated device used for tinning and resistance testing of motor coils. [Background technology]

[0002] The motor is a widely used electric drive device, which is widely used in various electrical equipment and daily necessities. With the continuous development of the economy, the production capacity and quality of motors have gradually become bottlenecks restricting various electrical industries. In traditional motor processing and production, especially in the two processing steps of tinning and resistance testing of motor stator coil windings, the above two processing steps are usually implemented manually. However, during the tinning operation of the lead ends of the coil windings, it is difficult for the staff to control the length of the lead ends immersed in the tinning tank filled with tin liquid according to the processing requirements, and it is easy for the lead ends to be too much or too little tinned, resulting in poor tinning effect and the quality of tinning cannot be guaranteed.

[0003] In addition, when workers use instruments such as resistance testers to test the resistance of coil windings, they are required to electrically connect the test terminals of the resistance tester to the corresponding lead terminals, resulting in the problem of low testing efficiency in the above-mentioned manual testing method.

[0004] For this reason, the present invention is studied and proposed in view of the above-mentioned problems. [Contents of the utility model]

[0005] The utility model aims to overcome the deficiencies of the prior art and to provide an automated device for tinning and resistance testing of motor coils, which can automatically perform tinning and resistance testing operations on coil windings, improve tinning efficiency, ensure good tinning effects, and improve testing efficiency.

[0006] The utility model is realized by the following technical solutions:

[0007] An automated device for tinning and resistance testing of motor coils comprises a workbench 1, wherein a loading station, a tinning station, a resistance testing station and an unloading station are sequentially arranged on the upper surface of the workbench 1 and along the conveying direction of a stator core 100, a rotating disk 12 for rotating the stator core 100 to the next station is rotatably arranged on the upper surface of the workbench 1, a positioning fixture 13 for clamping and positioning the stator core 100 is eccentrically arranged on the rotating disk 12, and a turntable driving mechanism 11 for driving the rotating disk 12 to rotate is arranged on the lower surface of the workbench 1; a tinning mechanism 2 for tinning the lead ends on the stator core 100 is arranged at the tinning station; and a resistance testing mechanism 3 for performing resistance testing on the coil windings on the stator core 100 is arranged at the resistance testing station.

[0008] As described above, an automated device for tinning and resistance testing of motor coils, the positioning fixture 13 includes a positioning connecting plate 131 at one end connected to the edge of the upper surface of the rotating disk 12, and the other end of the positioning connecting plate 131 is provided with a positioning column 132 extending downward along the Z-axis direction of the workbench 1 and used for the central hole of the stator core 100 to be sleeved and connected, and the outer wall of the positioning column 132 is provided with a side wall groove 133 extending along its length direction.

[0009] As described above, an automated equipment for tinning and resistance testing of motor coils, the tinning mechanism 2 includes a tin furnace 20 arranged at the tinning station and below the positioning fixture 13, and a first mounting frame 21 arranged at the tinning station, a first slider 23 that can slide along the Z-axis direction of the workbench 1 is provided on the first mounting frame 21 and above the tin furnace 20, a first slider driving assembly 22 for driving the first slider 23 to slide along the Z-axis direction of the workbench 1 is provided between the first slider 23 and the first mounting frame 21, and a slider guiding mechanism 24 is provided between the first slider 23 and the first mounting frame 21; the first slider 23 is connected to two first connecting frames 231 arranged at intervals, and the two first connecting frames 231 are connected to a tin box 232 located on the inner side of the tin furnace 20 and used to contain tin liquid.

[0010] As described above, an automated equipment for tinning and resistance testing of motor coils, the first slider driving assembly 22 includes a slider driving motor 221 arranged on a first mounting frame 21, the motor shaft of the slider driving motor 221 is coaxially and movably connected to a first transmission screw rod 222 extending along the Z-axis direction of the workbench 1, the first transmission screw rod 222 is slidably connected to a first transmission nut 223, and the first transmission nut 223 is connected to the first slider 23.

[0011] As described above, an automated equipment for tinning and resistance testing of motor coils is provided at the tinning station, and the tin scraping assembly 4 includes a scraper 43 for scraping off tin slag on the surface of the tin liquid in the tin box 232 and a scraper driving cylinder 42 for driving the scraper 43 to slide along the X-axis or Y-axis direction of the workbench 1. The tin scraping assembly 4 also includes a scraper lifting cylinder 41 arranged on the first mounting frame 21 for driving the scraper driving cylinder 42 and the scraper 43 to slide along the Z-axis direction of the workbench 1.

[0012] As described above, an automated equipment for tinning and resistance testing of motor coils, the resistance testing mechanism 3 includes a second mounting frame 31 arranged at the motor testing station, the second mounting frame 31 is slidably provided with a second slider 33 located below the positioning fixture 13, a slider lifting and driving cylinder 32 is provided between the second slider 33 and the second mounting frame 31 for driving the second slider 33 to slide along the Z-axis direction of the workbench 1, and the second slider 33 is provided with a resistance testing connecting rod needle 34 for electrically connecting to the lead end of the coil winding.

[0013] As described above, in the automated equipment for tinning and resistance testing of motor coils, the resistance detection station is also provided with a high-voltage test mechanism 5 for performing a high-voltage test on the stator core 100 .

[0014] As described above, an automated equipment for tinning and resistance testing of motor coils, the high-voltage test mechanism 5 includes a third slider 52 arranged next to the positioning fixture 13 and capable of moving along the X-axis or Y-axis direction of the workbench 1, and a slider driving cylinder 51 arranged on the second mounting frame 31 for driving the third slider 52 to move along the X-axis or Y-axis direction of the workbench 1, the third slider 52 is provided with a high-voltage test connection block 53 for electrically connecting to the outer wall of the stator core 100, and the end of the high-voltage test connection block 53 is provided with a positioning recess 531 for adapting to the outer wall of the stator core 100.

[0015] As described above, in the automated equipment for tinning and resistance testing of motor coils, a defective product station is provided on the workbench 1 and between the resistance testing station and the unloading station; a defective product unloading device 6 is provided at the defective product station.

[0016] As described above, an automated equipment for tinning and resistance testing of motor coils is provided, wherein the defective product unloading device 6 includes a third mounting frame 61 arranged at the defective product station, and a unloading clamping cylinder 63 for clamping the stator core 100 at the defective product station is provided on the third mounting frame 61 and below the positioning fixture 13, and a unloading driving cylinder 62 for driving the unloading clamping cylinder 63 to slide along the Z-axis direction of the workbench 1 is provided between the unloading clamping cylinder 63 and the third mounting frame 61; a defective product storage box 64 for storing defective stator cores 100 is also provided at the defective product station.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. When the utility model is working, the staff or the loading mechanism places the stator core on the positioning fixture at the loading station for clamping and positioning, and then the turntable driving mechanism drives the rotating disk to rotate relative to the workbench so that the positioning fixtures of the loading station, the tinning station, and the resistance testing station move synchronously to the corresponding next station. At this time, the tinning mechanism performs tinning operation on the lead end of the stator core at the tinning station, and at the same time, the resistance testing mechanism performs resistance testing operation on the coil winding of the stator core at the resistance testing station. Finally, the staff or the unloading device removes the stator core at the unloading station that has completed the tinning and resistance testing operations from the positioning fixture. For this reason, the utility model can realize automatic tinning and resistance testing operations on the coil winding, and the tinning mechanism and the resistance testing mechanism can realize synchronous operation, which has the characteristics of high integration, high tinning efficiency and high resistance testing efficiency.

[0019] 2. The utility model arranges the turntable driving mechanism and the rotating disk on the lower surface and the upper surface of the workbench respectively, which can make the structure of the upper surface of the workbench relatively simple and convenient to clean.

[0020] 3. A side wall groove extending along the length direction is provided on the outer wall of the positioning column. When the stator core is sleeved on the positioning column, the side wall groove is located between the outer wall of the positioning column and the inner wall of the center hole of the stator core, and the side wall groove is connected to the outside, so that it is convenient for the staff to sleeve the stator core on the positioning column or remove the stator core.

Brief Description of the Drawings

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 It is one of the three-dimensional diagrams of the present utility model.

[0023] Figure 2 This is the second stereogram of the present utility model.

[0024] Figure 3 It is a side view of the utility model.

[0025] Figure 4 It is a structural schematic diagram of the tinning mechanism in the utility model.

[0026] Figure 5 It is a structural schematic diagram of the tin scraping assembly in the utility model.

[0027] Figure 6 It is a structural schematic diagram of the resistance testing mechanism in the utility model.

[0028] Figure 7 It is a structural schematic diagram of the positioning fixture in the utility model. [Specific implementation method]

[0029] The implementation modes of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1-7 As shown, the utility model is an automated equipment for tinning and resistance testing of motor coils, comprising a workbench 1, wherein a loading station, a tinning station, a resistance testing station and an unloading station are sequentially arranged on the upper surface of the workbench 1 and along the conveying direction of the stator core 100, a rotating disk 12 for rotating the stator core 100 to the next station can be rotatably arranged on the upper surface of the workbench 1, a positioning fixture 13 for clamping and positioning the stator core 100 is eccentrically arranged on the rotating disk 12, and a turntable driving mechanism 11 for driving the rotating disk 12 to rotate is arranged on the lower surface of the workbench 1; a tinning mechanism 2 for tinning the lead ends on the stator core 100 is arranged at the tinning station; a resistance testing mechanism 3 for performing resistance testing on the coil windings on the stator core 100 is arranged at the resistance testing station. When the utility model is working, a staff member or a loading mechanism places the stator core on a positioning fixture at the loading station for clamping and positioning, and then the turntable driving mechanism drives the rotating disk to rotate relative to the workbench so that the positioning fixtures of the loading station, the tinning station, and the resistance testing station move synchronously to the corresponding next station. At this time, the tinning mechanism performs tinning operations on the lead ends of the stator core at the tinning station, and at the same time, the resistance testing mechanism performs resistance testing operations on the coil windings of the stator core at the resistance testing station. Finally, the staff member or the unloading device removes the stator core at the unloading station that has completed the tinning and resistance testing operations from the positioning fixture. Therefore, the utility model can realize automatic tinning and resistance testing operations on the coil windings, and the tinning mechanism and the resistance testing mechanism can realize synchronous operation, and has the characteristics of high integration, high tinning efficiency and high resistance testing efficiency.

[0031] like Figure 3 As shown, the utility model arranges the turntable driving mechanism and the rotating disk on the lower surface and the upper surface of the workbench respectively, which can make the structure of the upper surface of the workbench relatively simple and convenient to clean.

[0032] like Figure 3 As shown, the turntable drive mechanism 11 includes a turntable drive motor disposed on the lower surface of the worktable and a driving wheel coaxially and comovably connected to the motor shaft of the turntable drive motor, and a driven wheel directly or indirectly connected to the rotating disk 12. The driving wheel and the driven wheel are driven by a synchronous belt, and have the characteristics of smooth movement, simple structure and low cost. Furthermore, the driven wheel and the rotating disk 12 are connected by a transmission such as a reducer.

[0033] like Figure 1-3As shown in Figures 7 and 8, in order to quickly and stably position the stator core, the positioning fixture 13 includes a positioning connecting plate 131 connected to the upper edge of the rotating disk 12 at one end, and a positioning column 132 extending downward along the Z-axis direction of the workbench 1 and used for the center hole of the stator core 100 to be sleeved and connected at the other end of the positioning connecting plate 131. When loading, the staff or the loading device only needs to sleeve the center hole of the core 100 on the positioning column 132 at the loading station to achieve positioning. At this time, the lead end of the coil winding is downward or extended downward, which is convenient for subsequent tinning and resistance testing operations.

[0034] like Figure 7 As shown, the outer wall of the positioning column 132 is provided with a side wall groove 133 extending along the length direction thereof. In order to ensure a stable connection between the stator core and the positioning column, the inner wall of the center hole of the stator core and the outer wall of the positioning column are frictionally fitted or interference fit. In this embodiment, when the stator core is sleeved on the positioning column, the side wall groove is located between the outer wall of the positioning column and the inner wall of the center hole of the stator core, and the side wall groove is connected to the outside, so that it is convenient for the staff to sleeve the stator core on the positioning column or remove the stator core.

[0035] like Figure 7 As shown, in order to facilitate the staff to understand whether the stator core 100 is connected to the positioning column 132 in place, the positioning column 132 is provided with a blocking positioning shoulder 134 for abutting against the upper end wall of the stator core 100 when the stator core 100 is sleeved on the positioning column 132.

[0036] like Figure 7 As shown, a guiding arc surface / inclined surface 135 is provided at the lower end of the positioning column 132, which can play a guiding role and facilitate the installation of the stator core.

[0037] like Figure 1-4As shown, the tin dipping mechanism 2 includes a tin furnace 20 arranged at the tin dipping station and below the positioning fixture 13, and a first mounting frame 21 arranged at the tin dipping station, a first slider 23 which can slide along the Z-axis direction of the workbench 1 is provided on the first mounting frame 21 and above the tin furnace 20, a first slider driving assembly 22 for driving the first slider 23 to slide along the Z-axis direction of the workbench 1 is provided between the first slider 23 and the first mounting frame 21, a slider guiding mechanism 24 is provided between the first slider 23 and the first mounting frame 21; the first slider 23 is connected to two first connecting frames 231 arranged at intervals, and the two first connecting frames 231 are connected to a tin box 232 located on the inner side of the tin furnace 20 and used for containing tin liquid. During tin dipping, the first slider driving assembly 22 drives the first slider 23 to move upward along the Z-axis direction of the workbench. The first slider 23 drives the tin box 232 to move toward the side of the positioning fixture 13 at the tin dipping station through the first connecting frame 231, so that the lead end enters the tin box 232 for tin dipping. After the tin dipping is completed, the first slider driving assembly 22 drives the first slider 23 to move downward along the Z-axis direction of the workbench to reset.

[0038] like Figure 1-4 As shown, the first slider driving assembly 22 includes a slider driving motor 221 disposed on the first mounting frame 21, the motor shaft of the slider driving motor 221 is coaxially and comovably connected with a first transmission screw 222 extending along the Z-axis direction of the workbench 1, the first transmission screw 222 is slidably connected with a first transmission nut 223, and the first transmission nut 223 is connected to the first slider 23. This embodiment adopts the first transmission screw 222 and the first transmission nut 223 for transmission cooperation, which has the advantages of stable transmission, no noise, high transmission efficiency, and high transmission accuracy, so that the rising distance of the tin box 232 can be better controlled, ensuring that the tinning part of the lead end is not too much or too little tinned, and ensuring the tinning effect and tinning quality.

[0039] like Figure 1-5 As shown, the tin-scraping assembly 4 is provided at the tin-immersion station, and the tin-scraping assembly 4 includes a scraper 43 for scraping off the tin residue on the surface of the tin liquid of the tin box 232 and a scraper driving cylinder 42 for driving the scraper 43 to slide along the X-axis or Y-axis direction of the workbench 1. The tin-scraping assembly 4 also includes a scraper lifting cylinder 41 provided on the first mounting frame 21 for driving the scraper driving cylinder 42 and the scraper 43 to slide along the Z-axis direction of the workbench 1. During operation, the scraper lifting cylinder 41 drives the scraper driving cylinder 42 and the scraper 43 to slide downward along the Z-axis direction of the workbench 1, so that the scraping part of the scraper 43 enters the tin liquid of the tin box 232, and then the scraper driving cylinder 42 drives the scraper 43 to slide along the Y-axis direction of the workbench 1 to achieve the effect of scraping off the tin residue on the surface of the tin liquid at the tin-immersion station, which is conducive to ensuring the normal progress of the subsequent tin-immersion operation.

[0040] like Figure 1-3 As shown in , 6, the resistance testing mechanism 3 includes a second mounting frame 31 provided at the motor testing station, the second mounting frame 31 is slidably provided with a second slider 33 located below the positioning fixture 13, a slider lifting and driving cylinder 32 is provided between the second slider 33 and the second mounting frame 31 for driving the second slider 33 to slide along the Z-axis direction of the workbench 1, and the second slider 33 is provided with a resistance testing connecting rod needle 34 for electrically connecting to the lead end of the coil winding. During the test, the slider lifting and driving cylinder 32 drives the second slider 33 to drive the resistance testing connecting rod needle 34 to move upward along the Z-axis direction of the workbench, so that the resistance testing connecting rod needle 34 is connected to the corresponding lead end to perform resistance testing on the coil winding, thereby improving the test efficiency. Among them, the slider lifting and driving cylinder 32 is a slide cylinder or the like.

[0041] like Figure 1-3 As shown in Figures 6 and 7, a high-voltage test mechanism 5 for performing a high-voltage test on the stator core 100 is also provided at the resistance detection station. The high-voltage test mechanism 5 includes a third slider 52 arranged beside the positioning fixture 13 and capable of moving along the X-axis or Y-axis direction of the workbench 1, and a slider driving cylinder 51 arranged on the second mounting frame 31 for driving the third slider 52 to move along the X-axis or Y-axis direction of the workbench 1. The third slider 52 is provided with a high-voltage test connection block 53 for electrically connecting to the outer wall of the stator core 100, and the end of the high-voltage test connection block 53 is provided with a positioning notch 531 for matching with the outer wall of the stator core 100. During the test, the slider driving cylinder 51 drives the third slider 52 to drive the high-voltage test connection block 53 to slide along the Y-axis direction of the workbench, so that the positioning notch 531 is connected to the outer wall of the stator core at the high-voltage test station to perform a high-voltage test on the stator core. The slider driving cylinder 51 is a slide cylinder or a telescopic cylinder.

[0042] like Figure 1-3As shown, a defective product station is provided on the workbench 1 and is located between the resistance testing station and the unloading station; a defective product unloading device 6 is provided at the defective product station; the defective product unloading device 6 includes a third mounting frame 61 provided at the defective product station, and a unloading clamping cylinder 63 for clamping the stator core 100 at the defective product station is provided on the third mounting frame 61 and below the positioning fixture 13, and a unloading driving cylinder 62 for driving the unloading clamping cylinder 63 to slide along the Z-axis direction of the workbench 1 is provided between the unloading clamping cylinder 63 and the third mounting frame 61; a defective product storage box 64 for storing defective stator cores 100 is also provided at the defective product station. When unloading the defective stator core 100, the unloading clamping cylinder 63 clamps the stator core 100 at the defective position, and then the unloading driving cylinder 62 drives the unloading clamping cylinder 63 to move downward along the Z-axis direction of the workbench, so that the defective product is unloaded from the positioning fixture and moves to the side of the defective product storage box 64, and then the unloading clamping cylinder 63 releases the defective stator core 100 and makes it fall into the defective product storage box 64. Among them, the unloading driving cylinder 62 is a slide cylinder or the like.

[0043] like Figure 1-3 As shown, the defective product storage box 64 is arranged at an angle, so that the defective stator cores 100 in the defective product storage box 64 can be automatically stacked and stored.

Claims

1. An automated device for tinning and resistance testing of motor coils, characterized in that The invention comprises a workbench (1), wherein a loading station, a tinning station, a resistance testing station and an unloading station are sequentially arranged on the upper surface of the workbench (1) and along the conveying direction of the stator core (100); a rotating disk (12) for rotating the stator core (100) to the next station can be rotatably arranged on the upper surface of the workbench (1); a positioning fixture (13) for clamping and positioning the stator core (100) is eccentrically arranged on the rotating disk (12); and a rotating disk driving mechanism (11) for driving the rotating disk (12) to rotate is arranged on the lower surface of the workbench (1); The tinning station is provided with a tinning mechanism (2) for tinning the lead wire ends on the stator core (100); The resistance testing station is provided with a resistance testing mechanism (3) for performing resistance testing on the coil windings on the stator core (100).

2. The automated equipment for tinning and resistance testing of motor coils according to claim 1, characterized in that The positioning fixture (13) comprises a positioning connecting plate (131) having one end connected to the edge of the upper surface of the rotating disk (12); the other end of the positioning connecting plate (131) is provided with a positioning column (132) extending downward along the Z-axis direction of the workbench (1) and used for being sleeved and connected to the center hole of the stator core (100); the outer wall of the positioning column (132) is provided with a side wall groove (133) extending along its length direction.

3. The automated equipment for tinning and resistance testing of motor coils according to claim 1, characterized in that The tinning mechanism (2) comprises a tin furnace (20) arranged at the tinning station and below the positioning fixture (13) and a first mounting frame (21) arranged at the tinning station; a first slider (23) which can slide along the Z-axis direction of the workbench (1) is arranged on the first mounting frame (21) and above the tin furnace (20); a first slider driving assembly (22) for driving the first slider (23) to slide along the Z-axis direction of the workbench (1) is arranged between the first slider (23) and the first mounting frame (21); a slider guiding mechanism (24) is arranged between the first slider (23) and the first mounting frame (21); the first slider (23) is connected to two first connecting frames (231) arranged at intervals, and the two first connecting frames (231) are connected to a tin box (232) located inside the tin furnace (20) and used for containing tin liquid.

4. The automated equipment for tinning and resistance testing of motor coils according to claim 3, characterized in that The first slider driving assembly (22) comprises a slider driving motor (221) arranged on the first mounting frame (21); the motor shaft of the slider driving motor (221) is coaxially and comovably connected to a first transmission screw (222) extending along the Z-axis direction of the workbench (1); a first transmission nut (223) is slidably connected to the first transmission screw (222); and the first transmission nut (223) is connected to the first slider (23).

5. The automated equipment for tinning and resistance testing of motor coils according to claim 3, characterized in that The tin-scraping assembly (4) is provided at the tin-immersion station, and the tin-scraping assembly (4) comprises a scraper (43) for scraping off tin slag on the surface of the tin liquid of the tin box (232) and a scraper driving cylinder (42) for driving the scraper (43) to slide along the X-axis or Y-axis direction of the workbench (1). The tin-scraping assembly (4) also comprises a scraper lifting cylinder (41) provided on the first mounting frame (21) for driving the scraper driving cylinder (42) and the scraper (43) to slide along the Z-axis direction of the workbench (1).

6. The automated equipment for tinning and resistance testing of motor coils according to claim 1, characterized in that The resistance testing mechanism (3) comprises a second mounting frame (31) arranged at the motor testing station, a second slider (33) located below the positioning fixture (13) is slidably provided on the second mounting frame (31), a slider lifting and driving cylinder (32) for driving the second slider (33) to slide along the Z-axis direction of the workbench (1) is provided between the second slider (33) and the second mounting frame (31), and a resistance testing connecting rod needle (34) for electrically connecting to the lead end of the coil winding is provided on the second slider (33).

7. The automated equipment for tinning and resistance testing of motor coils according to claim 6, characterized in that A high voltage resistance testing mechanism (5) for performing a high voltage resistance test on the stator core (100) is also provided at the resistance detection station.

8. The automated equipment for tinning and resistance testing of motor coils according to claim 7, characterized in that The high-voltage test mechanism (5) comprises a third slider (52) arranged beside the positioning fixture (13) and capable of moving along the X-axis or Y-axis direction of the workbench (1), and a slider driving cylinder (51) arranged on the second mounting frame (31) for driving the third slider (52) to move along the X-axis or Y-axis direction of the workbench (1), the third slider (52) being provided with a high-voltage test connection block (53) for electrically connecting to the outer wall of the stator core (100), and the end of the high-voltage test connection block (53) being provided with a positioning notch (531) for matching with the outer wall of the stator core (100).

9. The automated equipment for tinning and resistance testing of motor coils according to any one of claims 1 to 8, characterized in that A defective product station is provided on the workbench (1) and is located between the resistance testing station and the unloading station; a defective product unloading device (6) is provided at the defective product station.

10. The automated equipment for tinning and resistance testing of motor coils according to claim 9, characterized in that The defective product unloading device (6) comprises a third mounting frame (61) arranged at the defective product station, a material unloading clamping cylinder (63) for clamping the stator core (100) at the defective product station is arranged on the third mounting frame (61) and below the positioning fixture (13), and a material unloading driving cylinder (62) for driving the material unloading clamping cylinder (63) to slide along the Z-axis direction of the workbench (1) is arranged between the material unloading clamping cylinder (63) and the third mounting frame (61); a defective product storage box (64) for storing defective stator cores (100) is also arranged at the defective product station.

Images