Rotor core pressing rivet detection screening technology and pressing rivet detection screening system thereof

Abstract

The invention discloses a rotor iron core pressing rivet detecting and screening process and a rotor iron core pressing rivet detecting and screening system. Firstly, an iron core is positioned and installed at the center of a feeding station; the angle of the iron core is adjusted through shooting of a visual module and a rotating mechanism at the positioning station; the press riveting action is executed at the press riveting station through an upper pressing die; after the iron core is positioned at the coding and scribing station, a two-dimensional code is generated on the upper end face of the iron core through laser, and information is uploaded to a database by scanning the two-dimensional code; the flatness is calculated through a detection module at the flatness detection station, the overlying coefficient is calculated, and the flatness and the overlying coefficient are uploaded to a database; large magnetic steel groove detection and small magnetic steel groove detection of the iron core are realized at the go gauge detection station; at the air shower station, the iron core in the rotating state is blown through negative ion air shower; rating is carried out at a rating station according to data information obtained through code scanning; and the iron cores are divided into OK products and NG products at the discharging station according to rating. According to the invention, an automatic production line for screening after riveting and continuous detection of the rotor core is realized.

Description

Technical Field

[0001] The invention relates to the technical field of rotor core processing and detection, in particular to a rotor core press riveting detection and screening process and a rotor core press riveting detection and screening system. Background Art

[0002] The rotor core is made by riveting the stacked sheets, and then needs to go through multiple testing processes to make sure the product meets the qualified standards before it can be packaged. Usually, the riveting and multiple testing processes are carried out separately, and there are certain synergistic differences, which can easily cause product accumulation in a certain link, thus affecting the overall production efficiency. The simple combination of conventional assembly lines is prone to precision deviation, resulting in a series of problems such as misdetection, missed detection, large detection errors, difficulty in comprehensive performance evaluation, manual intervention, and low degree of automation. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a rotor core press riveting detection and screening process and a rotor core press riveting detection and screening system, so as to solve the problem that conventional production lines cannot realize rotor core press riveting and continuous detection and screening.

[0004] Technical solution: To achieve the above purpose, the rotor core press riveting detection and screening process and the press riveting detection and screening system of the present invention include the following steps:

[0005] S1. Install the core in the center of the loading station, then weigh and clean it with air shower;

[0006] S2, photographing and identifying a group of magnetic steel slot positions of the iron core by a visual module at the positioning station, calculating an angle deviation based on the photographed position and a preset position, and adjusting the angle of the iron core by a rotating mechanism based on the obtained angle deviation, so as to make the upper riveting point of the iron core correspond to the upper die forming groove after the iron core is transferred to the riveting station;

[0007] S3, performing riveting action by the upper die at the riveting station, during which the pressure value is sensed by the pressure sensor at the bottom of the iron core, and when the preset pressure value is reached, the pressure is maintained, and after the pressure maintenance is completed, the upper die is reset, and the riveting is completed;

[0008] S4. Generate a QR code exclusive to the current core at the coding and engraving station. After the core is positioned according to the position of the large magnetic steel slot on the core, generate a QR code on its upper end surface by laser, and upload the information to the database by scanning the QR code.

[0009] S5. At the flatness detection station, the detection module is used to apply pressure to the upper end surface of the core. When the preset pressure value is reached, the pressure is stopped. The flatness is calculated by sensing the results of multiple contact displacement sensors, and the height value of the core when pressed is measured. Then, the detection module is controlled to rise. When the pressure value is reduced to 0N, the height value of the upper surface of the core is measured. The stacking coefficient of the core is calculated by the height values ​​measured before and after the pressure is released, and the flatness and stacking coefficient are uploaded to the database.

[0010] S6. At the through gauge inspection station, the inspection slots are pressed down to engage with the corresponding magnetic steel slots on the iron core, and the large magnetic steel slots and small magnetic steel slots of the iron core are inspected in sequence by sensing the lifting and lowering states of each inspection slot;

[0011] S7, blowing the rotating iron core through negative ion air shower at the air shower station;

[0012] S8. After the core is positioned and installed at the rating station, two camera modules are used to detect whether the QR code and the engraved line positions are accurate. After the detection results are uploaded to the database, the QR code is scanned and the rating is performed based on the data information obtained by scanning the code;

[0013] S9. At the unloading station, the cores are classified into OK and NG products according to the ratings, and are transferred to the corresponding conveyor lines respectively;

[0014] The iron core is transferred between the workstations of the above steps in sequence through a material transfer mechanism.

[0015] Furthermore, the iron core is clamped by a material transfer mechanism and transferred to a loading station, where the position of the center hole of the iron core is sensed by a sensor. After the sensing is in place, the movement of the material transfer mechanism is stopped, so that the iron core is located directly above the weighing support block, and a positioning column is extended from the center of the upper end surface of the weighing support block so that the positioning column is inserted into and fits with the center hole. The clamping of the iron core is then released, so that the iron core falls onto the weighing support block, thereby completing the weighing of the iron core.

[0016] Furthermore, weak compressed air is sprayed directly against the upper end surface of the iron core at the loading station, and the lower port of the iron core magnetic steel slot is blocked, so that the weak compressed air passes through the iron core laminated layers and is blown out from the cylindrical surface of the iron core; strong compressed air is sprayed vertically downward close to the outer side of the cylindrical surface of the iron core and blown towards the dust collection device at the bottom to complete the air shower cleaning of the iron core.

[0017] Furthermore, after the positioning station senses that the center hole of the iron core is in place through the sensor, the position of a group of magnetic steel slots on the iron core is identified by photographing through the visual module, and the bottom positioning turntable is controlled to rotate so that the positioning pins on it correspond to the magnetic steel slots. After rotation into place, the positioning pins are extended to cooperate with the corresponding magnetic steel slots, and the positioning column in the center is extended to cooperate with the center hole. The positioning pins are then driven to move along the matching magnetic steel slots to approach the positioning columns until they are in contact with the slot surface at the end of the magnetic steel slots, thereby limiting and clamping the iron core relative to the positioning turntable, and the positioning turntable is rotated to a preset angle position. The visual module then detects the degree of overlap with the preset angle position after rotation and adjustment. If they do not overlap, the deviation angle is calculated, and fine-tuned according to the deviation angle until they overlap, thereby completing the iron core angle positioning.

[0018] Furthermore, at the coding and engraving station, basic information is uploaded to the database by scanning the QR code to construct a data set corresponding to the iron core engraved with the QR code, and the results obtained from the subsequent station inspections are uploaded and saved in the corresponding data set. At the rating station, the data set of the corresponding iron core is obtained by scanning the code, and rating is performed based on the inspection results therein.

[0019] Furthermore, the loading station, positioning station, riveting station, coding and marking station, flatness detection station, through-gauge detection station, air shower station, rating station, and unloading station are arranged in linear sequence to form an assembly line, and adjacent stations are equidistantly arranged; the material transfer mechanism is arranged on one side of the assembly line, and is provided with clamps corresponding to a plurality of stations, respectively; the material transfer mechanism is arranged to slide back and forth along the arrangement direction of its own clamps, so that its upper clamps correspond alternately to two adjacent stations.

[0020] Furthermore, the loading station, positioning station, riveting station, coding and marking station, flatness detection station, through gauge detection station, air shower station, and rating station are all provided with sensors for sensing the center hole of the iron core. The output end of the center hole sensor at the loading station is electrically connected to the control signal receiving end of the material transfer mechanism, and the control signals of the center hole sensors at other multiple stations are connected to the action execution mechanisms of the corresponding stations.

[0021] Furthermore, the loading station, positioning station, riveting station, coding and marking station, flatness detection station, through gauge detection station, and rating station are all provided with positioning columns that cooperate with the center hole; the positioning station, riveting station, coding and marking station, flatness detection station, and rating station are all provided with positioning pins that cooperate with the magnetic steel groove, and the layout positions of the positioning pins on the riveting station, coding and marking station, and flatness detection station are consistent with the positions of the positioning pins after the positioning station adjusts the angle deviation; the through gauge detection station and the air shower station are both provided with a plurality of clamping bodies that surround the circular surface of the clamping iron core.

[0022] Beneficial effects: The rotor core riveting detection and screening process and the riveting detection and screening system of the present invention, by equidistantly arranging multiple stations and cooperating with a fixed reciprocating stroke material transfer mechanism, realize simple lateral movement and precise center alignment of the core workpiece between adjacent stations, ensuring that no position deflection occurs during the material transfer process, and then by performing center positioning and angle positioning at two stations respectively, and cooperating with angle limiting of multiple consecutive stations, the detection accuracy at multiple subsequent detection stations is ensured, and there is no need for repeated positioning at each station, which helps to improve the overall efficiency. By constructing a corresponding data set, it is convenient to concentrate multiple detection results for rating and screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structural module distribution of the pressure riveting detection and screening system of the present invention;

[0024] Figure 2 The figure is a schematic structural diagram of a positioning station according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] As attached Figure 1-2 The riveting detection and screening process of the rotor core and its riveting detection and screening system, the riveting detection and screening system includes a loading station 1, a positioning station 2, a riveting station 3, a coding and marking station 4, a flatness detection station 5, a through gauge detection station 6, an air shower station 7, a rating station 8, and a unloading station 9, and a plurality of stations are arranged linearly in sequence to form an assembly line, and adjacent stations are arranged equidistantly; the material shifting mechanism 10 is arranged on one side of the assembly line, and it is respectively provided with clamps corresponding to a plurality of stations, and the material shifting mechanism 10 is arranged to slide back and forth along the arrangement direction of its own clamps, so that the clamps on it correspond alternately to two adjacent stations. The core is transferred between the stations of the following steps in the order of steps through the material shifting mechanism 10. Specifically, the following steps are included:

[0027] S1. Center the core at loading station 1, then weigh and clean it with air shower.

[0028] Among them, the iron core 11 is clamped by the material transfer mechanism 10 and transferred to the loading station 1. At the loading station 1, the position of the center hole 12 of the iron core is sensed by the sensor. After the sensing is in place, the movement of the material transfer mechanism 10 is stopped, so that the iron core is located directly above the weighing support block 13, and a positioning column 14 is extended from the center of the upper end surface of the weighing support block, so that the positioning column 14 is inserted and matched with the center hole 12, and then the clamping of the iron core is released, so that the iron core falls on the weighing support block, and the weighing of the iron core is completed.

[0029] At the loading station 1, weak compressed air is sprayed directly onto the upper end surface of the iron core 11, and the lower port of the iron core magnetic steel slot is blocked so that the weak compressed air passes through the core laminates and is blown out from the cylindrical surface of the iron core 11; strong compressed air is sprayed vertically downward close to the outer side of the cylindrical surface of the iron core 11 and blown toward the dust collection device at the bottom to complete the air shower cleaning of the iron core.

[0030] Among them, the dust collecting device at the bottom is set as a dust collecting hopper 15 and is set in a fixed position. The weighing support block is fixedly set at the center position of the port of the dust collecting hopper through a bracket. A wind hood 16 is lifted and lowered above the weighing support block. A strong compression air port 17 and a weak compression air port 18 are respectively opened on the top shell wall of the wind hood, and the two air ports are separated by an annular partition plate 19. After the core is centered by the positioning column and the clamping claws of the material moving mechanism are removed, the core is covered by the descending wind hood. When the outer wall of the wind hood is pressed against the upper end of the dust hopper, the internal annular partition just touches the upper end surface of the core, but does not exert pressure on the core. Subsequently, strong and weak compressed air are respectively sprayed from the two internal air ports, wherein weak compressed air is blown into each magnetic steel slot 20 of the core. Since the core is placed on the weighing support block, the bottom port of the magnetic steel slot is relatively closed, and weak compressed air is blown out from the gaps between the layers of the core to blow away the dust particles in the gaps between the layers, so that the laminations are stacked more tightly, thereby making the stacking coefficient as close to 1 as possible to ensure better riveting quality.

[0031] S2. At the positioning station 2, a group of magnetic steel slot positions of the iron core are photographed and identified by the visual module, and the angle deviation is calculated based on the photographed position and the preset position. The angle of the iron core is adjusted according to the obtained angle deviation by the rotating mechanism, so that the upper riveting point of the iron core corresponds to the upper die forming groove after the iron core is transferred to the riveting station 3.

[0032] After the positioning station 2 uses the sensor to sense that the center hole of the iron core is in place, the visual module is used to capture and identify the position of a group of magnetic steel slots on the iron core, and the bottom positioning turntable is controlled to rotate so that the positioning pins on it correspond to the magnetic steel slots. After rotating into place, the positioning pins are extended to fit with the corresponding magnetic steel slots, and the positioning column 14 at the same time is extended from the center to fit with the center hole 12. The positioning pins are then driven to move along the matching magnetic steel slots to approach the positioning column 14 until they fit with the slot surface at the end of the magnetic steel slot, thereby limiting and clamping the iron core relative to the positioning turntable, and the positioning turntable is rotated to a preset angle position. The visual module then detects the degree of overlap with the preset angle position after rotation and adjustment. If they do not overlap, the deviation angle is calculated and fine-tuned according to the deviation angle until they overlap, thereby completing the iron core angle positioning.

[0033] That is, a target angle position of the positioning turntable is set in advance, and then the material transfer mechanism is used to clamp and transfer the material so that the iron core coincides with the center of the positioning turntable. The distribution positions of the magnetic steel slots on the iron core can be intuitively seen through the visual module installed above the turntable. At the same time, the position of the bottom turntable can also be photographed through the magnetic steel slots. When the sensor senses that the center hole of the iron core coincides with the position of the positioning column, the positioning turntable is driven to rotate. When the real-time image of the visual module observes that the position of the positioning pin coincides with the position of the magnetic steel slot, the rotation of the turntable is stopped immediately. Then the positioning pin and the positioning column are extended synchronously and inserted into the corresponding magnetic steel slot and the center hole respectively. Then the positioning pin is moved horizontally, and the iron core is clamped together by the positioning pin and the positioning column. The positioning pins are set to two or more, so as to accurately realize the positioning of the iron core relative to the positioning turntable. Then the turntable drives the iron core to rotate to a preset angle position. On this basis, the positioning machine is further detected by the visual module to ensure that the angle position is correct after rotation. If there is a slight deviation, a group of magnetic steel slots of the iron core are identified by photographing, and a reference line of the group of magnetic steel slots passing through the center point of the iron core in the image is obtained through feature extraction and identification. Then the reference line is compared with the preset reference line, and the angle is calculated in the software. The angle is adjusted by the positioning turntable according to the angle until the angle calculated by the image is 0, and the adjustment of the positioning turntable is stopped.

[0034] S3, performing riveting action by the upper die at riveting station 3, during which the pressure value is sensed by the pressure sensor at the bottom of the core, and when the preset pressure value is reached, the pressure is maintained, and after the pressure maintenance is completed, the upper die is reset, and the riveting is completed;

[0035] S4, generating a QR code exclusive to the current core at the coding and marking station 4, positioning the core according to the position of the large magnetic steel slot on the core, generating a QR code on its upper end surface by laser, and uploading the information to the database by scanning the QR code;

[0036] S5, at the flatness detection station 5, the detection module is used to apply pressure to the upper end surface of the core, and the pressure is stopped after reaching the preset pressure value, and the flatness is calculated by sensing the results of multiple contact displacement sensors, and the height value of the core when pressed is measured, and then the detection module is controlled to rise, and when the pressure value is reduced to 0N, the height value of the upper surface of the core is measured, and the stacking coefficient of the core is calculated by the height values ​​measured before and after the pressure is released, and the flatness and stacking coefficient are uploaded to the database;

[0037] Among them, the detection module includes a pressure structure, when the pressure structure presses the iron core, its lower end face is in contact with the upper end face of the iron core, a plurality of detection holes are arranged on the lower end face of the pressure structure, and a contact displacement sensor is arranged inside, which generates a certain displacement by contacting the upper end face of the iron core and detects the value, so as to calculate and obtain the flatness evaluation, wherein the layout of the detection holes is selected to detect points on both sides of the riveting positioning, for example, preferably, if there are 8 evenly arranged riveting points, two mutually symmetrical points are selected on both sides of each riveting point as detection points, that is, 16 detection points are arranged, and since the flatness difference mainly comes from the riveting process, the layout of the detection points can be effectively reduced, and the flatness detection evaluation can be accurately obtained. At the same time, the lower end face of the pressure structure corresponding to the outer side of the iron core is provided with a distance sensor for measuring the distance between the iron core support surface and the lower end face of the pressure structure, that is, the measurement of the height of the iron core under the pressure state is realized, and it can quickly respond according to its own pressure, and timely obtain the height value under the corresponding pressure state, so that the calculated stacking coefficient is more reliable.

[0038] S6. At the through gauge inspection station 6, the inspection grooves are pressed down to engage with the multiple magnetic steel grooves on the iron core, and the large magnetic steel grooves and small magnetic steel grooves of the iron core are inspected in sequence by sensing the lifting and lowering status of each inspection groove. Through gauge inspection grooves are arranged at the bottom of the pressing block according to the distribution of the magnetic steel grooves, and the downward pressure of the pressing block is detected by a displacement sensor. If it is found that the pressing block is blocked and cannot be pressed down into place, that is, there is an error in the size accuracy of the magnetic steel groove or there is a deviation in the stacking of the iron sheets, the corresponding inspection result is determined to be NG.

[0039] S7. In the air shower station 7, the iron core in the rotating state is blown by negative ion air shower; in this station, the iron core is also covered by a wind hood for spraying. Unlike the loading station, it adopts an integral top-down strong compressed air spraying, and the bottom is equipped with a dust collector for dust recovery. In the airflow, the iron core is driven to rotate by a rotating device, and the dust on the upper and lower end surfaces is moved outward by centrifugal force and blown away in the airflow, so as to achieve the purpose of complete cleaning.

[0040] S8. After the core is positioned and installed at the rating station 8, two camera modules are used to detect whether the QR code and the engraved line positions are accurate. After the detection results are uploaded to the database, the QR code is scanned and rating is performed based on the data information obtained by scanning the code; at the coding and engraving station 4, basic information is uploaded to the database by scanning the QR code to construct a data set corresponding to the core engraved with the QR code, and the results obtained from subsequent station detections are uploaded and saved to the corresponding data set. At the rating station 8, the data set of the corresponding core is obtained by scanning the code, and rating is performed based on the detection results therein.

[0041] This workstation is designed to ensure that the QR code and engraved line positions meet production standards and that the barcode reader can accurately scan the QR code to obtain valid rating data. The rating mainly relies on the results of the above multiple tests.

[0042] S9. At unloading station 9, the iron cores are classified into OK products and NG products according to the ratings, and are transferred to the corresponding conveyor lines respectively; thus, the qualified and unqualified iron core products are screened.

[0043] Preferably, the feeding station 1, positioning station 2, riveting station 3, coding and marking station 4, flatness detection station 5, through gauge detection station 6, air shower station 7, and rating station 8 are all provided with sensors for sensing the center hole of the iron core, and the output end of the center hole sensor of the feeding station 1 is electrically connected to the control signal receiving end of the material transfer mechanism 10, and the control signals of the center hole sensors of the other multiple stations are connected to the action execution mechanism of the corresponding station. The center positioning of step S1 is coordinated with the fixed stroke transfer of the material transfer mechanism to achieve the center alignment state of the iron core and the subsequent multiple stations. That is, the in-place stop action of the material transfer mechanism is controlled by the center positioning on the first station, so that the multiple clamps on the material transfer mechanism correspond to the multiple stations one by one at the same time, and the center positioning sensors on the subsequent multiple stations are used for alignment detection feedback. If there is a misalignment in any station, an alarm is issued and the misaligned station is indicated, so as to find out the existing faults and maintain the overall functionality of the system.

[0044] The feeding station 1, positioning station 2, riveting station 3, coding and marking station 4, flatness detection station 5, through gauge detection station 6, and rating station 8 are all provided with a positioning column 14 that cooperates with the center hole 12; the positioning station 2, riveting station 3, coding and marking station 4, flatness detection station 5, and rating station 8 are all provided with positioning pins that cooperate with the magnetic steel slot, and the layout positions of the positioning pins on the riveting station 3, coding and marking station 4, and flatness detection station 5 are consistent with the positions of the positioning pins after the angle deviation of the positioning station 2 is adjusted; the angle positioning of step S2 is coordinated with the fixed stroke transfer of the material transfer mechanism to achieve that the iron core always maintains a fixed angle position during the subsequent riveting and detection process, so that the subsequent riveting, coding and marking positions, plane detection positions, and magnetic steel slot detection positions all maintain high-precision alignment. It effectively avoids the angle deflection of the iron core workpiece during the transfer of multiple stations, and ensures that the angle remains unchanged under the angle constraints of multiple stations, especially in the through gauge inspection station. Since the inspection groove strip needs to be placed in the groove for inspection, it is impossible to limit the angle by cooperating with the positioning pin and the magnetic steel groove. Therefore, the angle constraint of the first multiple stations is used to ensure the accuracy of the angle position, so that the iron core can be fixed by external clamping during the magnetic steel groove inspection. The air shower station needs to spray and clean the magnetic steel groove and the center hole, so external clamping is also used, that is, the through gauge inspection station 6 and the air shower station 7 are both provided with multiple clamping bodies surrounding the circular surface of the clamped iron core. Therefore, the rating station 8 also needs to be provided with a positioning turntable structure consistent with the positioning station 2, which is used to adjust the angle so that the two cameras on this station just correspond to the detection of the QR code and the engraved line position, and the QR code scanning rating is realized while ensuring that there is no error.

[0045] Based on the above settings, the multiple clamps on the material transfer mechanism 10 release all the clamps at the same time and move away from the assembly line synchronously only after the material transfer mechanism receives that all the positioning columns and positioning pins are extended, and then move forward one workstation distance, waiting for all workstations to complete the corresponding actions before performing the next clamping and material transfer.

[0046] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the above principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. The rotor core pressure riveting detection and screening process is characterized by: The following steps are involved: S1. The core is centrally positioned and installed at the loading station (1), and then weighed and air-showered; S2, photographing and identifying a group of magnetic steel slot positions of the iron core by a visual module at the positioning station (2), calculating an angle deviation based on the photographed position and a preset position, and adjusting the angle of the iron core by a rotating mechanism based on the obtained angle deviation, so as to make the upper riveting point of the iron core correspond to the upper die forming groove after the iron core is transferred to the riveting station (3); S3, at the riveting station (3), the upper die performs riveting, during which the pressure value is sensed by the pressure sensor at the bottom of the iron core. When the preset pressure value is reached, the pressure is maintained. After the pressure maintenance is completed, the upper die is reset, and the riveting is completed; S4, generating a QR code exclusive to the current core at the coding and engraving station (4), positioning the core according to the position of the large magnetic steel slot on the core, generating a QR code on its upper end surface by laser, and uploading the information to the database by scanning the QR code; S5, at the flatness detection station (5), the detection module applies pressure to the upper end surface of the core, and stops pressing down after reaching a preset pressure value. The flatness is calculated by sensing the results of multiple contact displacement sensors, and the height value of the core when pressed is measured. The detection module is then controlled to rise. When the pressure value is reduced to 0N, the height value of the upper surface of the core is measured. The stacking coefficient of the core is calculated based on the height values ​​measured before and after the pressure is released, and the flatness and stacking coefficient are uploaded to the database; S6, at the through gauge inspection station (6), the inspection slots are pressed down to engage with the corresponding magnetic steel slots on the iron core, and the large magnetic steel slots and small magnetic steel slots of the iron core are inspected by sensing the lifting and lowering states of the inspection slots; S7, blowing the rotating iron core through negative ion air shower at the air shower station (7); S8. After the core is positioned and installed at the rating station (8), two camera modules are used to detect whether the QR code and the engraved line positions are accurate. After the detection results are uploaded to the database, the QR code is scanned and rating is performed based on the data information obtained by scanning the code; S9, at the unloading station (9), the cores are classified into OK and NG categories according to the ratings, and are transferred to the corresponding conveyor lines respectively; The iron core is transferred between the workstations of the above steps in sequence through a material transfer mechanism (10).

2. The rotor core pressure riveting detection and screening process according to claim 1 is characterized in that: The iron core (11) is clamped by a material transfer mechanism (10) and transferred to a loading station (1). At the loading station (1), a sensor senses the position of the center hole (12) of the iron core. After sensing the position, the movement of the material transfer mechanism (10) is stopped, so that the iron core is located directly above a weighing support block (13). A positioning column (14) is extended from the center of the upper end surface of the weighing support block, so that the positioning column (14) is inserted and matched with the center hole (12). Subsequently, the clamping of the iron core is released, so that the iron core falls onto the weighing support block, thereby completing the weighing of the iron core.

3. The rotor core pressure riveting detection and screening process according to claim 2 is characterized in that: At the loading station (1), weak compressed air is sprayed directly onto the upper end surface of the iron core (11), and the lower port of the iron core magnetic steel slot is blocked, so that the weak compressed air passes through the core stacking layers and is blown out from the cylindrical surface of the iron core (11); strong compressed air is sprayed vertically downward close to the outer side of the cylindrical surface of the iron core (11) and blown toward the dust collecting device at the bottom, thereby completing the air shower cleaning of the iron core.

4. The rotor core pressure riveting detection and screening process according to claim 3 is characterized in that: After the sensor senses that the core center hole is in place at the positioning station (2), the position of a group of magnetic steel slots on the core is identified by the visual module, and the bottom positioning turntable is controlled to rotate so that the positioning pins on it correspond to the magnetic steel slots. After rotation, the positioning pins are extended to fit with the corresponding magnetic steel slots, and the central positioning column (14) is extended to fit with the center hole (12). The positioning pins are then driven to move along the matching magnetic steel slots to approach the positioning column (14) until they fit with the slot surface at the end of the magnetic steel slot, thereby limiting and clamping the core relative to the positioning turntable. The positioning turntable is rotated to a preset angle position, and the visual module then detects the overlap between the rotation and the preset angle position. If they do not overlap, the deviation angle is calculated, and fine-tuned according to the deviation angle until they overlap, thereby completing the core angle positioning.

5. The rotor core pressure riveting detection and screening process according to claim 4 is characterized in that: At the coding and marking station (4), basic information is uploaded to the database by scanning the QR code, which is used to construct a data set corresponding to the iron core engraved with the QR code, and the results obtained from the subsequent station detection are uploaded and saved in the corresponding data set. At the rating station (8), the data set of the corresponding iron core is obtained by scanning the code, and rating is performed based on the detection results therein.

6. The press riveting detection and screening system for the press riveting detection and screening process of the rotor core according to any one of claims 1 to 5, characterized in that: The loading station (1), the positioning station (2), the riveting station (3), the coding and marking station (4), the flatness detection station (5), the through gauge detection station (6), the air shower station (7), the rating station (8), and the unloading station (9) are arranged linearly in sequence to form an assembly line, and adjacent stations are arranged equidistantly; the material transfer mechanism (10) is arranged on one side of the assembly line, and is provided with clamps corresponding to the plurality of stations respectively; the material transfer mechanism (10) is arranged to slide back and forth along the arrangement direction of its own clamps, so that its upper clamps correspond to two adjacent stations alternately.

7. The press riveting detection and screening system for the press riveting detection and screening process of the rotor core according to claim 6, characterized in that: The loading station (1), positioning station (2), riveting station (3), coding and marking station (4), flatness detection station (5), through gauge detection station (6), air shower station (7), and rating station (8) are all provided with sensors for sensing the center hole of the iron core. The output end of the center hole sensor of the loading station (1) is electrically connected to the control signal receiving end of the material transfer mechanism (10), and the control signals of the center hole sensors of the other multiple stations are connected to the action execution mechanisms of the corresponding stations.

8. The press riveting detection and screening system for the press riveting detection and screening process of the rotor core according to claim 7, characterized in that: The feeding station (1), the positioning station (2), the riveting station (3), the coding and marking station (4), the flatness detection station (5), the through gauge detection station (6), and the rating station (8) are all provided with a positioning column (14) matched with the central hole (12); the positioning station (2), the riveting station (3), the coding and marking station (4), the flatness detection station (5), and the rating station (8) are all provided with a positioning pin matched with the magnetic steel groove, and the arrangement positions of the positioning pins on the riveting station (3), the coding and marking station (4), and the flatness detection station (5) are consistent with the positions of the positioning pins after the angle deviation of the positioning station (2) is adjusted; the through gauge detection station (6) and the air shower station (7) are both provided with a plurality of clamping bodies surrounding the circular surface of the clamping iron core.

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