Rotor magnetization quality detection device and method

Abstract

The present invention discloses a rotor magnetization quality detection device, comprising a magnetization workbench, a workbench base, a turntable, a control device and a detection actuator; the magnetization workbench and the detection actuator are fixed on the workbench base, the turntable is rotatably connected to the magnetization workbench, and the control device is electrically connected to the turntable and the detection actuator; the detection actuator comprises at least one detector, a detection rod and a servo system; the detector is fixed on the detection rod, and the detection rod is fixed on the servo system; the servo system drives the detection rod to move the detector to a detection position; when the detection rod moves to the detection position, the detection direction of the detector points to the center of the rotor to be measured, and the distance from the center of the circle is a preset radius r, and the preset radius r is greater than the maximum value R of the outer circle radius of the rotor to be measured after the magnetization is completed; the control device is used to control the movement of the turntable and the servo system, and control the detector to perform detection, calculate detection data and output a detection report.

Description

Technical Field

[0001] The present invention relates to the field of motor manufacturing, and in particular to a device and method for detecting the magnetization quality of a rotor. Background Art

[0002] After the motor rotor is magnetized, traditional inspection involves measuring the rotor's outer diameter with a handheld vernier caliper and the magnet runout with a handheld dial indicator to verify that the various dimensions meet design standards. With the automation of production technology and the continuous improvement of production efficiency, the frequency of product quality inspections is also increasing to ensure excellent quality. Therefore, traditional inspection methods are inefficient, have a low degree of automation, are limited by the lack of human operator standardization, and have low measurement accuracy, incomplete measurement data, and the inability to generate inspection reports and effectively trace quality anomalies. Summary of the Invention

[0003] The Summary of the Invention introduces a series of simplified concepts, which are simplifications of existing technologies in the field and are further described in detail in the Detailed Description of the Invention. The Summary of the Invention is not intended to define the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] In order to solve the above technical problems, the present invention provides a rotor magnetization quality detection device, comprising:

[0005] Magnetic workbench, workbench base, turntable, control device and detection actuator;

[0006] The magnetic sticking workbench and the detection actuator are fixed on the workbench bottom plate, the turntable is rotatably connected to the magnetic sticking workbench, and the control device is electrically connected to the turntable and the detection actuator;

[0007] The detection actuator includes at least one detector, a detection rod and a servo system; the detector is fixed on the detection rod, and the detection rod is fixed on the servo system; the servo system drives the detection rod to move the detector to the detection position;

[0008] When the detection rod moves to the detection position, the detection direction of the detector points to the center of the rotor to be tested, and the distance from the center of the circle is a preset radius r, and the preset radius r is greater than the maximum outer radius R of the rotor to be tested after the magnet is attached;

[0009] The control device is used to control the movement of the turntable and the servo system, and to control the detector to perform detection, calculate detection data and output a detection report.

[0010] Preferably, there are two detectors, namely a first detector and a second detector, and the detection directions of the first detector and the second detector form a preset angle.

[0011] Preferably, the detection width of the detector is greater than the thickness of the rotor to be measured.

[0012] Preferably, the detector is a laser detector.

[0013] The present invention also provides a rotor magnetization quality detection method, comprising:

[0014] Step S1, detector position calibration; Step S2, installing the rotor to be tested, rotating the rotor to be tested to the starting detection position, the rotor to be tested has been magnetized and has n magnets and n spacers; Step S3, testing the rotor to be tested at the detection position, driving the rotor to be tested to rotate one circle, and recording n groups of detection data, wherein the detection data at least includes the maximum value R of the outer circle radius of the rotor to be tested; Step S4, performing statistical calculations on the maximum values R of the outer circle radius of the n groups of rotors to be tested to determine whether the outer circle radius of the rotor to be tested is qualified; Step S5, outputting a detection report.

[0015] Preferably, in step S1, the position correction method is: install a cylindrical standard workpiece with a radius of R' on the turntable, drive the detector to the detection position, and obtain two detection values L at two different positions of the cylindrical standard workpiece. If the two detection values L meet condition one, it is determined that the detector position is correct. If condition one is not met, adjust the detector position until condition one is met; condition one is that the preset radius r minus the detection value L is equal to the radius R' of the cylindrical standard workpiece.

[0016] Preferably, in step S2, the starting detection position is when the spacer bars of the rotor to be tested face the detector.

[0017] Preferably, in step S4, a statistical calculation is performed on the maximum outer radius R of the n groups of rotors to be tested, and a method for judging whether the outer radius of the rotor to be tested is qualified is: obtaining the extreme value Rmax among the maximum outer radius R of the n groups of rotors; if the extreme value Rmax is less than a preset extreme value threshold GAP, then the outer radius of the rotor to be tested is judged to be qualified.

[0018] Preferably, in step S3, the test data further includes a distance d between the upper edge of the magnet and a reference line; the reference line is formed by fitting after testing the upper edge of the rotor to be tested. Step S4 further includes statistically calculating the distances d between the n groups of upper edge of the magnet and the reference line to determine whether the magnet runout of the rotor to be tested is acceptable.

[0019] Preferably, in step S4, a statistical calculation is performed on the distance d between the upper surface edge of the n groups of magnets and the reference line, and a method for judging whether the magnet jump of the rotor to be tested is qualified is: performing pairwise difference calculation on the distance d1 between the upper surface edge of the n groups of magnets and the reference line to obtain magnet jump data σ; if the absolute value of the magnet jump data σ is less than the preset magnet jump threshold gap, the magnet jump is judged to be qualified.

[0020] Preferably, when there are two detectors, namely the first detector and the second detector, in step S3, the n groups of detection data of the first detector and the n groups of detection data of the second detector are compared. When the comparison result exceeds the preset error threshold, the process proceeds to step S1 to re-calibrate the detector position.

[0021] Compared with the existing technology, the present invention is conducive to improving the degree of automation of detection technology, improving production efficiency, avoiding the outflow of defective products due to human operating errors, and has high measurement accuracy. The measurement data is comprehensive and specific, and a test report record can be formed for archiving, which can provide a basis for the traceability of products with abnormal quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are intended to illustrate the general characteristics of methods, structures, or materials used in specific exemplary embodiments according to the present invention and to supplement the descriptions in the specification. However, the drawings herein are schematic diagrams not drawn to scale and may not accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings herein should not be interpreted as defining or limiting the range of values or properties covered by the exemplary embodiments according to the present invention. The present invention is further described in detail below in conjunction with the drawings and specific embodiments:

[0023] Figure 1 Schematic diagram of the structure of the rotor magnetization quality detection device of Example 1;

[0024] Figure 2 Schematic diagram of the detection position of the detector;

[0025] Figure 3 Schematic diagram of the detector scanning detection in the rotor magnetization quality detection method of Example 2;

[0026] Figure 4 Schematic diagram of the distance d between the upper surface edge of n groups of magnets and the reference line in Example 2;

[0027] Figure 5 This is a schematic diagram of n groups of detection data in Example 2. DETAILED DESCRIPTION

[0028] The following describes the implementation manner of the present invention through specific specific embodiments. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners, and the various details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0029] Example 1

[0030] like Figure 1 As shown, this embodiment involves the rotor magnetization quality detection device of the present invention, which includes: a magnetization workbench 1, a workbench base plate 5, a turntable 4, a control device and a detection actuator; wherein the turntable has been horizontally calibrated, and the control device is not shown in the figure.

[0031] The magnetic sticking workbench 1 and the detection actuator are fixed on the workbench bottom plate 5, the turntable 4 is rotatably connected to the magnetic sticking workbench 1, and the control device is electrically connected to the turntable 4 and the detection actuator 2;

[0032] The detection actuator 2 includes at least one detector 22, a detection rod 21 and a servo system; the detector 22 is fixed to the detection rod 21, and the detection rod 21 is fixed to the servo system; the servo system drives the detection rod 21 to move the detector 22 to the detection position;

[0033] In this embodiment, there are two detectors, namely a first detector E1 and a second detector E2, both of which are laser detectors. The detection directions of the first detector E1 and the second detector E2 form a preset angle θ. The detection width of the detector is greater than the thickness of the rotor 3 to be measured.

[0034] The detection rod 21 is installed on the guide rail 23 of the detection actuator 2 and moves forward and backward along the guide rail 23 driven by the servo system 24 to the set detection position. The laser detectors E1 and E2 are installed at the front end of the detection rod 21.

[0035] like Figure 2 As shown, O is the center of the rotor to be tested, R is the maximum radius of the outer circle of the rotor to be tested 3 after magnetization, The arc is centered at O, and the preset radius r is the radius of the arc and is a fixed value (r = 600 mm in this example). The laser detectors E1 and E2 are tangent to the arc. The detection directions of E1 and E2 form an angle θ (θ=12° in this example), L is the distance between the detector and the outer circle of the magnet 31, then: the outer circle diameter of the rotor 3 after magnetization is D=2R, R=rL.

[0036] When the detection rod 21 moves to the detection position, the detection direction of the detector points to the center of the rotor 3 to be tested, and the distance from the center is a preset radius r, and the preset radius r is greater than the maximum value R of the outer circle radius of the rotor 3 to be tested after the magnetization is completed;

[0037] The control device is used to control the movement of the turntable 4 and the servo system, and to control the detector to perform detection, calculate detection data and output a detection report.

[0038] Laser detector ranging uses a laser as a light source to measure distance. A laser rangefinder is an instrument that uses lasers to accurately measure the distance to a target. When operating, the laser rangefinder emits a very fine beam of laser light toward the target. A photoelectric element receives the laser beam reflected by the target, and a timer measures the time from emission to reception of the laser beam, calculating the distance from the observer to the target. This embodiment, based on the principle of laser ranging, designs a quality inspection actuator that can be applied to an automatic magnetizing machine. It scans and measures the surface features of the magnetized traction machine rotor. After calculation and processing, it obtains the relevant dimensional data of its surface features, thereby determining whether the required dimensional data meets the relevant design and production standards.

[0039] Example 2

[0040] This embodiment relates to a rotor magnetization quality detection method of the present invention, comprising:

[0041] Step S1, detector position correction;

[0042] Step S2: installing the rotor to be tested and rotating the rotor to a starting detection position. The rotor to be tested has been magnetized and has n magnets and n spacers.

[0043] Step S3, testing the rotor to be tested at the testing position, driving the rotor to be tested to rotate one circle, and recording n sets of test data, wherein the test data at least includes the maximum value R of the outer circle radius of the rotor to be tested;

[0044] Step S4, performing statistical calculation on the maximum outer radius R of the n groups of rotors to be tested, and judging whether the outer radius of the rotor to be tested is qualified;

[0045] Step S5: output the detection report.

[0046] This embodiment involves two detectors, namely a first detector E1 and a second detector E2. Of course, the method of this embodiment can also be adopted when only one detector is used.

[0047] In step S1, the position correction method is: install a cylindrical standard workpiece with a radius of R' on the turntable, drive the detector to the detection position, and obtain two detection values L at two different positions of the cylindrical standard workpiece. If the two detection values L meet condition one, it is determined that the detector position is correct. If condition one is not met, adjust the detector position until condition one is met; condition one is that the preset radius r minus the detection value L is equal to the radius R' of the cylindrical standard workpiece.

[0048] In step S2, the starting detection position is when the spacer bar of the rotor to be tested is facing the detector. For example, the detection actuator 2 drives the detection rod 21 to move to the set detection position, the laser detectors E1 and E2 are turned on, and the rotor to be tested is rotated to the starting detection position, with one spacer bar facing the detector E1.

[0049] In step S3, the turntable 4 drives the rotor to be measured to rotate counterclockwise at a set speed, and the laser detectors E1 and E2 scan the rotor to be measured respectively. Figure 3 and Figure 4 As shown in the figure, when the detectors E1 and E2 scan the edge of the upper surface of the rotor being measured, the pixel points displayed on the oscilloscope are fitted by the computer to form a reference line HH.

[0050] When the detector E1 scans the spacer 1, the waveform of each pixel after computer fitting displayed on the oscilloscope is K1. At this time, the system records the measurement data: serial number 1.

[0051] As the rotor under test rotates counterclockwise, as detector E1 scans from the right edge of the magnet to the left, the waveform displayed on the oscilloscope, after computer fitting, is Magnet 1: The peak transitions from a1 to A1, and then from A1 to a1, reaching its maximum at A1. At this point, the measured value (R1 = r - L1) reaches its maximum value, and the system records the measurement data: R1. Furthermore, during the scanning process, the distance d between the waveform line displayed on the oscilloscope, after computer fitting, at each pixel on the upper edge of the magnet and the reference line HH is recorded by the system. The system also records the measurement data: d.

[0052] After driving the rotor to be tested to rotate one circle, n sets of test data can be recorded, such as Figure 5 ; When n sets of data are recorded, stop measuring, the rotor stops rotating, and E1 and E2 stop working.

[0053] In step S4, the maximum outer radius R values of the n groups of rotors to be tested are statistically calculated. A method for determining whether the outer radius of the rotor to be tested is to obtain an extreme value Rmax among the maximum outer radius values R of the n groups of rotors. If the extreme value Rmax is less than a preset extreme value threshold GAP, the outer radius of the rotor to be tested is determined to be qualified. Otherwise, it is determined to be NG.

[0054] In the step S4, the method for statistically calculating the distance d between the upper surface edge of n groups of magnets and the reference line and determining whether the magnet runout of the rotor to be measured is qualified is as follows: calculate the difference between every two of the distances d (d1, d2, d3,......, dn) between the upper surface edge of n groups of magnets and the reference line to obtain the magnet runout data σ. If the absolute value of the magnet runout data σ is less than the preset magnet runout threshold gap, that is, |σ| < gap, it is determined that the magnet runout is qualified. Otherwise, it is determined as NG.

[0055] The present invention has been described in detail through specific embodiments and examples above, but these do not constitute limitations on the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A rotor magnetization quality detection device, characterized in that: include: A magnetic workbench, a workbench base, a turntable, a control device, and a detection actuator, wherein the turntable has been leveled; The magnetic sticking workbench and the detection actuator are fixed on the workbench bottom plate, the turntable is rotatably connected to the magnetic sticking workbench, and the control device is electrically connected to the turntable and the detection actuator; The detection actuator includes at least one detector, a detection rod and a servo system; the detector is fixed on the detection rod, and the detection rod is fixed on the servo system; the servo system drives the detection rod to move the detector to the detection position; When the detection rod moves to the detection position, the detection direction of the detector points to the center of the rotor to be tested, and the distance from the center of the circle is a preset radius r, and the preset radius r is greater than the maximum outer radius R of the rotor to be tested after the magnet is attached; The control device is used to control the movement of the turntable and the servo system, and control the detector to perform detection and calculate the detection data; based on the detection data, it is determined whether the outer circle radius and magnet runout of the rotor to be tested are qualified, and output a detection report; The detection width of the detector is greater than the thickness of the rotor to be measured; The detector is a laser rangefinder; The detection data at least includes the maximum value R of the outer circle radius of the rotor to be measured and the distance d between the edge of the upper surface of the magnet and the reference line; the reference line is formed by fitting after detecting the edge of the upper surface of the rotor to be measured.

2. The rotor magnetization quality detection device according to claim 1, characterized in that: There are two detectors, namely a first detector and a second detector, and the detection directions of the first detector and the second detector form a preset angle.

3. The rotor magnetization quality detection device according to claim 1, characterized in that: The detector is a laser detector.

4. A rotor magnetization quality detection method using the rotor magnetization quality detection device according to claim 1, characterized in that: include: Step S1, detector position correction; Step S2: installing the rotor to be tested and rotating the rotor to a starting detection position. The rotor to be tested has been magnetized and has n magnets and n spacers. Step S3: testing the rotor to be tested at the testing position, driving the rotor to be tested to rotate one revolution, and recording n sets of test data, wherein the test data includes at least the maximum value R of the outer radius of the rotor to be tested and the distance d between the edge of the upper surface of the magnet and a reference line; the reference line is formed by fitting after testing the edge of the upper surface of the rotor to be tested; Step S4, statistically calculating the maximum outer radius R of the n groups of rotors to be tested to determine whether the outer radius of the rotors to be tested is qualified; statistically calculating the distance d between the upper surface edge of the n groups of magnets and the reference line to determine whether the magnet runout of the rotors to be tested is qualified; Step S5: output the detection report.

5. The rotor magnetization quality detection method according to claim 4, characterized in that: In step S1, the position correction method is as follows: a cylindrical standard workpiece with a radius of R' is mounted on a turntable, the detector is driven to a detection position, and two detection values L are obtained by detection at two different positions of the cylindrical standard workpiece. If the two detection values L meet condition 1, it is determined that the detector position is correct; if the condition 1 is not met, the detector position is adjusted until the condition 1 is met. The first condition is that the preset radius r minus the detection value L is equal to the radius R' of the cylindrical standard workpiece.

6. The rotor magnetization quality detection method according to claim 4, characterized in that: In step S2, the initial detection position is when the spacer bars of the rotor to be tested face the detector.

7. The rotor magnetization quality detection method according to claim 4, characterized in that: In step S4, a statistical calculation is performed on the maximum outer radius R of the n groups of rotors to be tested. The method for judging whether the outer radius of the rotor to be tested is qualified is as follows: an extreme value Rmax among the maximum outer radius R of the n groups of rotors is obtained; if the extreme value Rmax is less than a preset extreme value threshold GAP, the outer radius of the rotor to be tested is judged to be qualified.

8. The rotor magnetization quality detection method according to claim 7, characterized in that: In step S4, a statistical calculation is performed on the distance d between the upper surface edge of the n groups of magnets and the baseline. The method for judging whether the magnet jump of the rotor to be tested is qualified is as follows: the distance d between the upper surface edge of the n groups of magnets and the baseline is subtracted from each other to obtain magnet jump data σ. If the absolute value of the magnet jump data σ is less than the preset magnet jump threshold gap, the magnet jump is judged to be qualified.

9. The rotor magnetization quality detection method according to claim 4, characterized in that: When there are two detectors, namely a first detector and a second detector, in step S3, n groups of detection data of the first detector and n groups of detection data of the second detector are compared. When the comparison result exceeds the preset error threshold, the process proceeds to step S1 to re-calibrate the detector position.

Images