Line laser stator core detection device and method

Abstract

The invention relates to a linear laser stator core detection device, which comprises a frame-shaped detection rack and a detection platform which is arranged in the detection rack and is used for placing a stator core, and is characterized by further comprising a manipulator which is arranged beside the detection rack and is controlled by an upper computer, and a linear laser measuring instrument which is in signal transmission connection with a detection system of the upper computer, the stator iron core is horizontally placed on the detection platform, the line laser measuring instrument is arranged at the free end of the manipulator and extends into an inner hole of the stator iron core, and the line laser measuring instrument is driven by the manipulator to move in the inner hole of the stator iron core to scan the inner wall of the stator iron core. According to the stator core punching sheet irregularity detection device, automatic stator core punching sheet irregularity detection is formed, the detection reliability and accuracy are effectively improved, the detection requirements of stator cores of different sizes and specifications are met, and automatic stator core punching sheet irregularity detection with high efficiency, high accuracy and high compatibility is formed. The invention also provides a linear laser stator core detection method.

Description

Technical Field

[0001] The invention relates to a linear laser stator core detection device structure and method, belonging to the technical field of stator core detection. Background Art

[0002] The traction stator core is composed of many ring-shaped punching sheets stacked together. After stacking, the punching sheets may be uneven, such as Figure 1 As shown in the figure, uneven punching may cause the unevenness of the stator core punching (abbreviated as "unevenness") to fail to meet product requirements. Therefore, the unevenness of the stator core punching needs to be tested after the stator core is stacked. Currently, the main methods for testing the unevenness of the stator core punching are rough inspection using feeler gauges, depth gauge inspection, three-coordinate inspection, and dial indicator combined with machining center inspection. These methods all have problems: 1. Select feeler gauges of different thicknesses and place them on the uneven punching sheets to compare the protruding height of the uneven punching sheets. Roughly detect the unevenness of the stator core punching sheets, and there will be large detection errors.

[0003] 2. Use a depth gauge to detect the height difference between the uneven punching piece and the adjacent normal punching piece. Because the inner hole of the punching piece is an arc, the surface of the depth gauge base cannot be aligned with the surface of the inner hole of the punching piece, resulting in a large detection error.

[0004] 3. Although the three-coordinate detection has high accuracy, it is very difficult for the three-coordinate probe to accurately contact the uneven punching sheet (the thickness of the punching sheet is only 0.5mm), making the detection difficult.

[0005] 4. Using a dial indicator combined with a machining center for detection, the stator installation and position correction steps are cumbersome, inefficient, and the detection accuracy is not high.

[0006] Existing methods for detecting stator core lamination irregularities have the disadvantages of low detection accuracy, poor stability, low efficiency, and low degree of automation. Summary of the Invention

[0007] The linear laser stator core inspection device provided by the present invention provides automated stator core lamination misalignment detection, effectively improving detection reliability and accuracy. This device meets the requirements for inspecting stator cores of varying sizes and specifications, enabling highly efficient, high-precision, and highly compatible automated stator core lamination misalignment detection. The present invention also provides a linear laser stator core inspection method.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is: A linear laser stator core inspection device includes a frame-shaped inspection frame and an inspection platform mounted within the inspection frame for placing the stator core. The device is characterized in that it also includes a manipulator disposed adjacent to the inspection frame and controlled by a host computer, and a linear laser measuring instrument connected to the host computer's inspection system for signal transmission. The stator core is placed horizontally on the inspection platform, and the linear laser measuring instrument is mounted at the free end of the manipulator and extends into the inner bore of the stator core. Driven by the manipulator, the linear laser measuring instrument moves within the inner bore of the stator core to scan the inner wall of the stator core.

[0009] Preferably, the detection platform is an electrically controlled rotating platform, and a visual sensor connected to the detection platform for signal transmission is installed on the top of the detection frame.

[0010] Preferably, the visual sensor is mounted on the top of the detection rack via a sensor bracket, and the mounting position of the sensor bracket on the top of the detection rack is adjustable.

[0011] Preferably, the manipulator is L-shaped and mounted on a mounting base, the free end of the manipulator is equipped with a mounting bracket arranged along the axial direction of the stator core, and the line laser measuring instrument is mounted on the mounting bracket along the radial direction of the stator core. The line laser measuring instrument rises and falls with the rise and fall of the manipulator, rotates in the inner hole of the stator core with the rotation of the free end of the manipulator, and moves along the axial direction of the stator core with the extension of the manipulator.

[0012] The above-mentioned linear laser stator core detection method is characterized by comprising the following steps: First, place the stator core to be tested horizontally on the testing platform, and adjust the placement direction of the stator core so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator; Then, based on the size of the stator core, the height of the central axis, and the laser scanning distance and width of the line laser measuring instrument, the robot adjusts the initial position of the line laser measuring instrument in the inner hole of the stator core, and the detection system of the host computer sets the process of the line laser measuring instrument's movement in the inner hole of the stator core; Next, the line laser measuring instrument is started and driven by a manipulator to move the line laser measuring instrument in the inner hole of the stator core to scan the inner wall of the stator core, and the scanning information is transmitted to the detection system of the host computer; After the scan is completed, the detection system of the host computer analyzes and processes the received scan information to obtain the detection results of the stator core punching unevenness.

[0013] Preferably, after the stator core to be inspected is placed on the inspection platform, the placement direction of the stator core is detected by a visual sensor, and the detection signal is transmitted to the inspection platform. The inspection platform drives the stator core to rotate according to the detection signal, and adjusts the placement direction of the stator core so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator.

[0014] Preferably, the height of the line laser measuring instrument in the inner hole of the stator core is adjusted by raising and lowering the manipulator, so that the inner wall of the stator core is within the laser scanning distance of the line laser measuring instrument. The initial position of the line laser measuring instrument in the inner hole of the stator core is adjusted by extending and retracting the manipulator, so that the line laser measuring instrument can move in the inner hole of the stator core and completely scan the inner wall of the stator core.

[0015] Preferably, "the process of setting the movement of the line laser measuring instrument in the inner hole of the stator core" refers to setting the line laser measuring instrument to move axially from one end of the inner hole of the stator core to the other end N times according to the axial length of the stator core and the laser scanning width of the line laser measuring instrument, and rotating the line laser measuring instrument 360 degrees before each axial movement to scan the inner wall of the stator core. The distance of each axial movement is the laser scanning width of the line laser measuring instrument until the inner wall of the stator core is completely scanned, and N is an integer, and N is greater than the integer part of the ratio of the axial length of the stator core to the laser scanning width of the line laser measuring instrument.

[0016] The beneficial effects of the invention are: The linear laser stator core detection device of the present invention has a stator core placed horizontally on a detection platform, a manipulator extends a linear laser measuring instrument into the stator core and drives the linear laser measuring instrument to move in the inner hole of the stator core to scan the inner wall of the stator core, a detection system of a host computer receives scanning information from the linear laser measuring instrument and analyzes and processes the scanning information to obtain detection results of the stator core punching sheet irregularity, thereby forming an automated stator core punching sheet irregularity detection, and the movement of the manipulator drives the linear laser measuring instrument to move in the inner hole of the stator core to achieve a comprehensive scan of the stator core inner wall, which can effectively improve the reliability and accuracy of the detection, and by adjusting the position of the linear laser measuring instrument by the manipulator, the detection requirements of stator cores of different sizes and specifications can be met, thereby forming a high-efficiency, high-precision and high-compatibility automated stator core punching sheet irregularity detection.

[0017] After the stator core is placed on the detection platform, the placement direction of the stator core is detected by a visual sensor, and the detection signal is transmitted to the detection platform. The detection platform drives the stator core to rotate according to the detection signal, and adjusts the placement direction of the stator core so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator, ensuring that the line laser measuring instrument can move along the axial direction of the stator core as the manipulator retracts and retracts, thereby improving the detection reliability and avoiding the deviation of the stator core placement direction affecting the detection accuracy. When the stator core is long, the stator core can be rotated 180 degrees through the detection platform so that the two ends of the stator core are successively close to the side where the manipulator is located, so as to ensure that the line laser measuring instrument can extend from both ends of the stator core to scan the inner wall of the stator core, thereby meeting the detection needs of longer stator cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a stator core with uneven laminations.

[0019] Figure 2 Schematic diagram of the stator core being placed on the online laser stator core detection device. DETAILED DESCRIPTION

[0020] The following combination Figure 2 The embodiments of the present invention are described in detail.

[0021] A linear laser stator core inspection device includes a frame-shaped inspection frame 1, an inspection platform 2 mounted within the inspection frame 1 for placing a stator core 100, and is characterized in that it also includes a manipulator 3 disposed adjacent to the inspection frame 1 and controlled by a host computer, and a linear laser measuring instrument 4 connected to the host computer's inspection system for signal transmission. The stator core 100 is placed horizontally on the inspection platform 2, and the linear laser measuring instrument 4 is mounted at the free end of the manipulator 3 and extends into the inner bore of the stator core 100. Driven by the manipulator 3, the linear laser measuring instrument 4 moves within the inner bore of the stator core to scan the inner wall of the stator core.

[0022] In the above-mentioned linear laser stator core detection device, the stator core 100 is placed horizontally on the detection platform 2, the manipulator 3 extends the linear laser measuring instrument 4 into the stator core 100 and drives the linear laser measuring instrument 4 to move in the inner hole of the stator core to form a scan of the inner wall of the stator core. The detection system of the upper computer receives the scanning information of the linear laser measuring instrument 4 and analyzes and processes the scanning information to obtain the detection result of the stator core punching irregularity, forming an automated stator core punching irregularity detection. The movement of the manipulator 3 drives the linear laser measuring instrument 4 to move in the inner hole of the stator core to achieve a comprehensive scan of the inner wall of the stator core, which can effectively improve the reliability and accuracy of the detection. By adjusting the position of the linear laser measuring instrument by the manipulator 3, the detection requirements of stator cores of different sizes and specifications can be met, forming a high-efficiency, high-precision and high-compatibility automated stator core punching irregularity detection.

[0023] The inspection platform 2 is an electrically controlled rotating platform, and a visual sensor 5 connected to the inspection platform 2 for signal transmission is mounted on the top of the inspection frame 1. After the stator core 100 is placed on the inspection platform 2, the visual sensor 5 detects the placement direction of the stator core and transmits a detection signal to the inspection platform 2. The inspection platform 2 rotates the stator core 100 based on the detection signal, adjusting the placement direction of the stator core 100 so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator. This ensures that the line laser measuring instrument 4 can move along the axial direction of the stator core as the manipulator retracts and retracts, improving detection reliability and preventing deviations in the stator core placement direction from affecting detection accuracy. Furthermore, when the stator core is long, the inspection platform can rotate the stator core 180 degrees, so that both ends of the stator core are successively closer to the side where the manipulator 3 is located. This ensures that the line laser measuring instrument 4 can extend from both ends of the stator core to scan the inner wall of the stator core, thus meeting the inspection requirements of longer stator cores.

[0024] The visual sensor 5 is mounted on the top of the detection rack 1 via a sensor bracket 6. The mounting position of the sensor bracket 6 on the top of the detection rack 1 is adjustable. The position of the visual sensor 5 can be adjusted by adjusting the position of the sensor bracket 6 on the top of the detection rack 1, thereby meeting the requirements for the placement direction detection of stator cores of different specifications. A guide rail can be provided on the detection rack 1 to cooperate with the sensor bracket 6, and the position of the sensor bracket 6 can be adjusted by moving the sensor bracket 6 on the guide rail.

[0025] The manipulator 3 is L-shaped and mounted on a mounting base 7. The free end of the manipulator 3 is equipped with a mounting bracket 8 arranged axially along the stator core. The line laser measuring instrument 4 is mounted on the mounting bracket 8 radially along the stator core. The line laser measuring instrument 4 rises and falls with the movement of the manipulator 3, rotates within the inner bore of the stator core 100 with the rotation of the free end of the manipulator 3, and moves axially along the stator core as the manipulator 3 extends. The position of the line laser measuring instrument 4 within the inner bore of the stator core must be adjusted to accommodate the inspection requirements of stator cores of varying sizes. Furthermore, the line laser measuring instrument 4 scans the inner bore of the stator core by rotating 360 degrees, then moving axially along the stator core to form multiple circumferential scans that advance sequentially along the axial direction. Therefore, a manipulator 3 with the freedom to rotate, elevate, and extend horizontally is required to drive the line laser measuring instrument 4 within the inner wall of the stator core to ensure a complete scan of the inner wall and reliable inspection.

[0026] The present invention also protects a stator core detection method using the above-mentioned linear laser, which is characterized by comprising the following steps: First, the stator core 100 to be tested is placed horizontally on the testing platform 2, and the placement direction of the stator core 100 is adjusted so that the axial direction of the stator core 100 is parallel to the extension direction of the free end of the manipulator 3; Then, based on the size of the stator core 100 and the height of the central axis, as well as the laser scanning distance and width of the line laser measuring instrument 4, the manipulator 3 adjusts the initial position of the line laser measuring instrument 4 in the inner hole of the stator core, and the detection system of the host computer sets the process of the line laser measuring instrument 4 moving in the inner hole of the stator core; Next, the line laser measuring instrument 4 is started and driven by the manipulator 3 to move the line laser measuring instrument 4 in the inner hole of the stator core to scan the inner wall of the stator core, and the scanning information is transmitted to the detection system of the host computer; After the scan is completed, the detection system of the host computer analyzes and processes the received scan information to obtain the detection results of the stator core punching unevenness.

[0027] In the detection method described above, the manipulator 3 extends the line laser measuring instrument 4 into the stator core 100 and drives the line laser measuring instrument 4 to move in the inner hole of the stator core to scan the inner wall of the stator core. The detection system of the host computer receives the scanning information of the line laser measuring instrument and analyzes and processes the scanning information to obtain the detection result of the stator core punching irregularity, forming an automated stator core punching irregularity detection. The movement of the manipulator 3 drives the line laser measuring instrument 4 to move in the inner hole of the stator core to achieve a comprehensive scan of the inner wall of the stator core, which can effectively improve the reliability and accuracy of the detection. By adjusting the position of the line laser measuring instrument by the manipulator 3, the detection requirements of stator cores of different sizes and specifications can be met, forming a high-efficiency, high-precision and high-compatibility automated stator core punching irregularity detection.

[0028] After the stator core 100 to be inspected is placed on the inspection platform 2, the visual sensor 5 detects the orientation of the stator core and transmits a detection signal to the inspection platform 2. The inspection platform 2 rotates the stator core based on the detection signal and adjusts the orientation of the stator core so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator 3. This prevents deviations in the stator core orientation from affecting the accuracy of the inspection, improves inspection accuracy, eliminates manual adjustment of the stator core orientation, and improves the automation level of the inspection.

[0029] The height of the line laser measuring instrument 4 within the stator core inner bore is adjusted by raising and lowering the manipulator 3, placing the stator core inner wall within the laser scanning range of the line laser measuring instrument 4. The initial position of the line laser measuring instrument 4 within the stator core inner bore is adjusted by extending and retracting the manipulator 3, allowing the line laser measuring instrument 4 to move within the stator core inner bore and completely scan the stator core inner wall. This ensures that the line laser measuring instrument 4 can completely scan the stator core inner wall, improving the reliability and accuracy of the detection.

[0030] Among them, "the process of setting the movement of the line laser measuring instrument in the inner hole of the stator core" refers to setting the line laser measuring instrument to move axially from one end of the inner hole of the stator core to the other end N times according to the axial length of the stator core 100 and the laser scanning width of the line laser measuring instrument 4. Before each axial movement, the line laser measuring instrument 4 is rotated 360 degrees to scan the inner wall of the stator core. The distance of each axial movement is the laser scanning width of the line laser measuring instrument until the inner wall of the stator core is completely scanned. N is an integer, and N is greater than the integer part of the ratio of the axial length of the stator core to the laser scanning width of the line laser measuring instrument 4. After the line laser measuring instrument 4 rotates 360 degrees in the inner hole of the stator core to perform a circumferential scan, it moves axially along the stator core to form multiple circumferential scans that advance in sequence along the axial direction, thereby ensuring that the inner wall of the stator core is completely scanned. The number of times N that the manipulator 3 drives the line laser measuring instrument 4 to move axially along the stator core should be determined according to the ratio of the axial length of the stator core to the laser scanning width of the line laser measuring instrument 4. N is greater than the integer part of the ratio of the axial length of the stator core to the laser scanning width of the line laser measuring instrument 4, ensuring that the inner wall of the stator core is completely scanned after the line laser measuring instrument performs N axial movements, thereby ensuring the reliability of the detection.

[0031] The above fully describes the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the embodiments described are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A linear laser stator core inspection device, comprising a frame-shaped inspection rack and an inspection platform mounted within the inspection rack for placing the stator core, characterized in that: It also includes a manipulator arranged next to the detection frame and controlled by a host computer, and a line laser measuring instrument connected to the host computer's detection system signal transmission. The stator core is placed horizontally on the detection platform, and the line laser measuring instrument is installed at the free end of the manipulator and extends into the inner hole of the stator core. The line laser measuring instrument moves in the inner hole of the stator core driven by the manipulator to scan the inner wall of the stator core.

2. The linear laser stator core detection device according to claim 1, characterized in that: The detection platform is an electrically controlled rotating platform, and a visual sensor connected to the detection platform for signal transmission is installed on the top of the detection frame.

3. The linear laser stator core detection device according to claim 2, characterized in that: The visual sensor is mounted on the top of the detection rack via a sensor bracket, and the mounting position of the sensor bracket on the top of the detection rack is adjustable.

4. The linear laser stator core detection device according to claim 1, characterized in that: The manipulator is L-shaped and mounted on a mounting base. The free end of the manipulator is equipped with a mounting bracket arranged along the axial direction of the stator core. The line laser measuring instrument is mounted on the mounting bracket along the radial direction of the stator core. The line laser measuring instrument rises and falls with the rise and fall of the manipulator, rotates in the inner hole of the stator core with the rotation of the free end of the manipulator, and moves along the axial direction of the stator core with the extension of the manipulator.

5. The linear laser stator core detection method according to any one of claims 1 to 4, characterized in that: The following steps are involved: First, place the stator core to be tested horizontally on the testing platform, and adjust the placement direction of the stator core so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator; Then, based on the size of the stator core, the height of the central axis, and the laser scanning distance and width of the line laser measuring instrument, the robot adjusts the initial position of the line laser measuring instrument in the inner hole of the stator core, and the detection system of the host computer sets the process of the line laser measuring instrument's movement in the inner hole of the stator core; Next, the line laser measuring instrument is started and driven by a manipulator to move the line laser measuring instrument in the inner hole of the stator core to scan the inner wall of the stator core, and the scanning information is transmitted to the detection system of the host computer; After the scan is completed, the detection system of the host computer analyzes and processes the received scan information to obtain the detection results of the stator core punching unevenness.

6. The linear laser stator core detection method according to claim 5, characterized in that: After the stator core to be inspected is placed on the inspection platform, the placement direction of the stator core is detected by a visual sensor, and the detection signal is transmitted to the inspection platform. The inspection platform drives the stator core to rotate according to the detection signal and adjusts the placement direction of the stator core so that the axial direction of the stator core is parallel to the extension direction of the free end of the manipulator.

7. The linear laser stator core detection method according to claim 5, characterized in that: The height of the line laser measuring instrument in the inner hole of the stator core is adjusted by raising and lowering the manipulator, so that the inner wall of the stator core is within the laser scanning distance of the line laser measuring instrument. The initial position of the line laser measuring instrument in the inner hole of the stator core is adjusted by extending and retracting the manipulator, so that the line laser measuring instrument can move in the inner hole of the stator core and completely scan the inner wall of the stator core.

8. The linear laser stator core detection method according to claim 5, characterized in that: The "process of setting the movement of the line laser measuring instrument in the inner hole of the stator core" means setting the line laser measuring instrument to move axially from one end of the inner hole of the stator core to the other end N times based on the axial length of the stator core and the laser scanning width of the line laser measuring instrument, and rotating the line laser measuring instrument 360 degrees before each axial movement to scan the inner wall of the stator core. The distance of each axial movement is the laser scanning width of the line laser measuring instrument, until the inner wall of the stator core is completely scanned, and N is an integer, and N is greater than the integer part of the ratio of the axial length of the stator core to the laser scanning width of the line laser measuring instrument.

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