A device and method for detecting unqualified products of permanent ferrite

Abstract

The present invention provides a device and method for detecting unqualified performance products of permanent ferrites, wherein the detection device comprises: a first conveying device, used for conveying the permanent ferrites to be detected; an automatic queuing device, arranged at the unloading end of the conveying device, used for arranging the permanent ferrites into a preset posture; a performance testing device, arranged at the discharge port of the automatic queuing device, comprising a magnetizing device and a magnetic flux testing device, the magnetic flux testing device and the magnetizing device are matched and arranged, the magnetizing device is used for weakly magnetizing the permanent ferrites; the magnetic flux testing device is used for synchronously performing a relative magnetic flux test on the permanent ferrites; when it is detected that the relative magnetic flux is within the preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as a unqualified product; the magnetic force of the magnetizing device can be adjusted; a feeding device, arranged at the discharge end of the automatic queuing device, is used for pushing the permanent ferrites onto the performance testing device; the present invention can effectively improve the detection efficiency and detection quality.

Description

Technical Field

[0001] The invention relates to the technical field of permanent ferrite detection, and in particular to a device and method for detecting unqualified permanent ferrite products. Background Art

[0002] The conventional way to detect magnetic tiles is that the inspector manually observes the outer surface of the permanent ferrite with the naked eye, and finally makes a judgment. However, manual detection has the following defects:

[0003] 1. It needs to be manually inspected by the inspector, and the labor cost of the inspection is high;

[0004] 2. During manual testing, due to different testers’ different testing experience, there is subjectivity in testing and low testing efficiency;

[0005] 3. Some defects are difficult to detect with the naked eye; for example, for some permanent ferrite products, the inner and outer arcs are not much different, and there is a problem of reverse grinding. After reverse grinding, it is impossible to distinguish qualified products from unqualified products by conventional methods;

[0006] In addition, impurities, oil stains, etc. are easily mixed into the permanent ferrite during the production process, which makes the product hollow inside. At this time, it is difficult to distinguish qualified products from unqualified products by conventional methods.

[0007] In order to improve the shortcomings of manual inspection, the traditional approach is to magnetize each piece of permanent ferrite product and then test the product's magnetic flux to determine whether the product is qualified. However, the sorting speed is slow and the product is magnetic after sorting.

[0008] Therefore, there is an urgent need to provide a permanent ferrite performance defective product detection device and detection method to overcome the above-mentioned shortcomings and effectively improve the detection efficiency and detection quality. Summary of the invention

[0009] The main purpose of the present invention is to provide a device and method for detecting defective permanent ferrite performance, which can overcome the above-mentioned shortcomings and effectively improve the detection efficiency and detection quality.

[0010] To achieve the above object, the present invention provides a device for detecting defective permanent ferrite products, comprising:

[0011] A first conveying device, used for conveying the permanent ferrite product to be tested;

[0012] An automatic queuing device, arranged at the unloading end of the conveying device, for arranging the permanent ferrite products into a preset posture;

[0013] A performance testing device is arranged at the discharge port of the automatic queuing device, and includes a magnetizing device and a magnetic flux testing device. The magnetic flux testing device is matched with the magnetizing device. The magnetizing device is used to weakly magnetize the permanent ferrite product along a first direction; the magnetic flux testing device is used to synchronously perform a relative magnetic flux test on the permanent ferrite product currently weakly magnetized along a second direction; when the relative magnetic flux is detected to be within a preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as a failed product; and the magnetic force of the magnetizing device can be adjusted;

[0014] A feeding device is arranged at the discharging end of the automatic queuing device and is used for pushing the permanent ferrite product onto the performance testing device.

[0015] As a further improvement of the above scheme, the automatic queuing device is a strip-shaped box body, which is vertically arranged between the first conveying device and the performance testing device, so that the permanent ferrite product passing through it reaches the performance testing device in a preset posture;

[0016] And the plane where the first conveying device is located is higher than the plane where the performance testing device is located.

[0017] As a further improvement of the above solution, the automatic queuing device includes a box body and a mounting seat;

[0018] The box body is a shell with openings at both ends, and the cross section of the box body is a shape that matches the preset posture of the permanent magnet ferrite product;

[0019] The mounting seat is blocked at an opening at one end of the box body, and the mounting seat end of the box body is provided with the discharge port, and the discharge port is arranged through the box body;

[0020] A feed port is also provided at the mounting seat end away from the box body, and the feed port is arranged on the surface of the box body facing the unloading end of the first conveying device.

[0021] As a further improvement of the above solution, grooves penetrating the inner cavity of the box body are further arranged on both side surfaces of the box body, and the grooves are arranged along the vertical direction of the box body.

[0022] As a further improvement of the above scheme, the magnetizing device includes a magnetizing bracket and a magnetizing magnet with adjustable magnetic force arranged on the upper part of the magnetizing bracket;

[0023] The magnetizing bracket is provided with a conveying channel for conveying the permanent ferrite product, the magnetizing magnet is provided at any position above the conveying channel, and there is a gap between the magnetizing magnet and the conveying channel, so as to weakly magnetize the permanent ferrite product passing through the conveying channel; the magnetic flux testing device is provided below the conveying channel and directly opposite to the magnetizing magnet.

[0024] As a further improvement of the above scheme, when the magnetizing magnet is an electromagnet, the magnetizing device also includes a magnetizing controller connected to the electromagnet, and the magnetizing controller is used to control the magnetic force of the magnetizing magnet.

[0025] As a further improvement of the above scheme, when the magnetizing magnet is a permanent magnet with a fixed magnetic force, the magnetizing magnet with different magnetic force is replaced according to the coercive force of the permanent ferrite product to be tested.

[0026] As a further improvement of the above scheme, the magnetizing bracket includes a bracket body and a magnet bracket mounted on the bracket body, the magnet bracket is used to support and place the magnetizing magnet, and is provided with an opening toward the conveying channel for magnetic lines of force to pass through to magnetize the permanent ferrite product.

[0027] As a further improvement of the above scheme, the conveying channel is arranged on the bracket body, and a magnetic flux testing device installation groove is also arranged on the bracket body directly below the conveying channel for installing the magnetic flux testing device.

[0028] As a further improvement of the above scheme, the magnetic flux testing device includes a measuring coil, a fluxmeter electrically connected to the measuring coil, and a magnetic flux testing controller; the measuring coil is arranged opposite to the magnetizing device, and is used to perform a magnetic flux test on the permanent ferrite product currently being magnetized.

[0029] As a further improvement of the above solution, the measuring coil is arranged below the conveying channel and faces the magnetizing magnet.

[0030] As a further improvement of the above scheme, the magnetic flux testing device also includes a buzzer alarm, which is electrically connected to the flux meter and the magnetic flux testing controller respectively, and is used to generate a buzzer alarm for the permanent ferrite product exceeding / lower than a preset magnetic flux.

[0031] As a further improvement of the above solution, a second conveying device is further provided at the unloading end of the magnetizing device for conveying the detected permanent ferrite products.

[0032] As a further improvement of the above scheme, the performance testing device is also provided with a reject mechanism, and the reject mechanism is communicatively connected with the magnetic flux test controller. When the magnetic flux test controller determines that the tested permanent magnet ferrite product exceeds / is lower than a preset magnetic flux, the reject mechanism is actuated to reject unqualified products.

[0033] As a further improvement of the above scheme, the feeding device includes a linear drive and a push rod arranged at the execution end of the linear drive, and the push rod is used to extend into the automatic queuing device to push the permanent ferrite product therein to the magnetizing device.

[0034] As a further improvement of the above solution, the linear drive includes but is not limited to a cylinder or an electric push rod.

[0035] The present invention also provides a method for detecting unqualified permanent ferrite products, the steps of which include:

[0036] S1: The permanent magnet ferrite products are arranged in sequence on a first conveying device, and the first conveying device conveys the permanent magnet ferrite products to a feed port of an automatic queuing device;

[0037] S2: the permanent ferrite products are arranged into a preset posture under the action of their own weight and under the constraint of the automatic queuing device, and are arranged in the automatic queuing device from top to bottom in sequence;

[0038] S3: starting a feeding device arranged at the discharge end of the automatic queuing device, wherein the feeding device sequentially pushes the permanent ferrite products to be tested in the automatic queuing device to the performance testing device;

[0039] S4: When the permanent ferrite product is pushed to the bottom of the magnetizing device, the magnetizing device weakly magnetizes the permanent ferrite product along the first direction according to the preset magnetic field, and starts the magnetic flux testing device at the same time. The magnetic flux testing device synchronously performs a relative magnetic flux test on the permanent ferrite product that is currently weakly magnetized along the second direction. When the relative magnetic flux is detected to be within the preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as an unqualified product.

[0040] As a further improvement of the above solution, the permanent ferrite products judged as unqualified products are rejected manually or by a rejection mechanism.

[0041] As a further improvement of the above solution, the preset magnetic field can be adjusted according to the coercive force of the permanent ferrite product to be tested.

[0042] As a further improvement of the above solution, for arc-shaped permanent ferrite products, the preset posture is a state of being placed with the inner arc facing the product.

[0043] Since the present invention adopts the above technical solution, the beneficial effects of this application are:

[0044] The present invention provides a device for detecting defective permanent ferrite products, comprising:

[0045] A first conveying device, used for conveying the permanent ferrite product to be tested;

[0046] An automatic queuing device, arranged at the unloading end of the conveying device, for arranging the permanent ferrite products into a preset posture;

[0047] A performance testing device is arranged at the discharge port of the automatic queuing device, and includes a magnetizing device and a magnetic flux testing device. The magnetic flux testing device is matched with the magnetizing device. The magnetizing device is used to weakly magnetize the permanent ferrite product along a first direction; the magnetic flux testing device is used to synchronously perform a relative magnetic flux test on the permanent ferrite product currently weakly magnetized along a second direction; when the relative magnetic flux is detected to be within a preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as a failed product; the magnetic force of the magnetizing device can be adjusted;

[0048] A feeding device, arranged at the discharging end of the automatic queuing device, for pushing the permanent ferrite product onto the performance testing device;

[0049] The detection device provided by the present invention has a simple and compact structure and can realize automatic detection of the performance of permanent ferrite. Compared with manual detection, the detection efficiency of unqualified products is greatly improved. At the same time, the detection device provided by the present invention charges the permanent ferrite to be detected with weak magnetism and performs a relative magnetic flux test on it. Whether the relative magnetic flux is within a preset magnetic flux range is judged to be qualified, and a unified standard is adopted to improve the detection quality. Furthermore, due to the use of the relative magnetic flux test method, defects in the permanent ferrite due to the molding process or the defects in the processing process can be detected, which also improves the detection quality.

[0050] In addition, during the entire detection process, the permanent ferrite to be detected is weakly magnetized, and the magnetic flux testing device detects the relative magnetic flux of the permanent ferrite, and the magnetic field size of the magnetizing device can be adjusted according to the coercive force of the permanent ferrite to be detected, so that the residual magnetism of the permanent ferrite after detection is within the allowable range, and no additional demagnetization operation is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0052] Figure 1 This is a schematic diagram of an arc-shaped permanent ferrite product;

[0053] Figure 2 This is a schematic diagram of a permanent ferrite product that may have reverse wear phenomenon;

[0054] Figure 3 It is a schematic diagram of a device for detecting defective permanent ferrite performance disclosed in the present invention;

[0055] Figure 4 It is a schematic diagram of the main view of the automatic queuing device disclosed in the present invention;

[0056] Figure 5 It is a rear view schematic diagram of the automatic queuing device disclosed in the present invention;

[0057] Figure 6 It is a left schematic diagram of the automatic queuing device disclosed in the present invention;

[0058] Figure 7 It is a top view schematic diagram of the automatic queuing device disclosed in the present invention;

[0059] Figure 8 It is a cross-sectional schematic diagram of the performance testing device disclosed in the present invention;

[0060] Fig. 9 It is a cross-sectional schematic diagram of the magnetizing bracket disclosed in the present invention.

[0061] Description of Figure Numbers:

[0062] 1. First conveying device; 2. Automatic queuing device; 21. Box body; 22. Mounting seat; 23. Discharge port; 24. Feed port; 25. Slot; 3. Performance testing device; 31. Magnetizing device; 311. Magnetizing bracket; 312. Magnetizing magnet; 313. Conveying channel; 32. Magnetic flux testing device; 321. Measuring coil; 322. Fluxmeter; 323. Buzzer alarm; 4. Feeding device; 5. Second conveying device; 6. Permanent ferrite.

[0063] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0066] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0067] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0068] In the above embodiments, those skilled in the art may adopt the existing technology for software control, and the present invention only protects a device for detecting defective permanent ferrite performance and the mutual connection relationship.

[0069] Embodiment 1:

[0070] Reference Figure 1 The arc-shaped permanent ferrite product 6 with obvious inner and outer arc difference is shown, and Figure 2 The arc-shaped permanent magnet ferrite 6 product without obvious inner and outer arc difference shown in the figure has a reverse grinding problem for some permanent magnet ferrite 6 products without obvious inner and outer arc difference, and such defects cannot be effectively distinguished by the naked eye of the inspector, which poses a hidden danger to product quality; for this reason, refer to Figure 3-Figure 9 The present invention provides a device for detecting defective permanent ferrite products, comprising:

[0071] The first conveying device 1 is used to convey the permanent ferrite 6 product to be tested;

[0072] An automatic queuing device 2, arranged at the unloading end of the conveying device, is used to arrange the permanent ferrite 6 products into a preset posture;

[0073] The performance testing device 3 is arranged at the discharge port 23 of the automatic queuing device 2, and includes a magnetizing device 31 and a magnetic flux testing device 32. The magnetic flux testing device 32 is matched with the magnetizing device 31. The magnetizing device 31 is used to weakly magnetize the permanent ferrite 6 product along a first direction; the magnetic flux testing device 32 is used to synchronously perform a relative magnetic flux test on the permanent ferrite 6 product currently weakly magnetized along a second direction; when the relative magnetic flux is detected to be within a preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as a failed product; and the magnetic force of the magnetizing device 31 can be adjusted;

[0074] A feeding device 4, arranged at the discharging end of the automatic queuing device 2, for pushing the permanent ferrite 6 product onto the performance testing device 3;

[0075] The detection device provided by the present invention has a simple and compact structure, and can realize automatic detection of the performance of the permanent ferrite 6. Compared with manual detection, the detection efficiency of unqualified products is greatly improved. At the same time, the detection device provided by the present invention charges the permanent ferrite 6 to be detected with weak magnetism, and tests the relative magnetic flux thereof. Whether the relative magnetic flux is within the preset magnetic flux range is judged to be qualified, and a unified standard is adopted to improve the detection quality. Furthermore, due to the use of the relative magnetic flux test method, the defects of the permanent ferrite 6 due to the molding process or the defects in the processing process can be detected, which also improves the detection quality.

[0076] In addition, during the entire detection process, the permanent ferrite 6 to be detected is weakly magnetized, and the magnetic flux testing device 32 detects the relative magnetic flux of the permanent ferrite 6, and the magnetic field size of the magnetizing device 31 can be adjusted according to the coercive force of the permanent ferrite 6 to be detected, so that the residual magnetism of the permanent ferrite 6 after detection is within the allowable range, and no additional demagnetization operation is required.

[0077] As a preferred embodiment, the automatic queuing device 2 is a strip-shaped box body, which is vertically arranged between the first conveying device 1 and the performance testing device 3, so that the permanent ferrite 6 product passing through it reaches the performance testing device 3 in a preset posture;

[0078] And the plane where the first conveying device 1 is located is higher than the plane where the performance testing device 3 is located; with such an arrangement, the arc-shaped permanent ferrite 6 products are arranged into a preset posture with the inner arc facing the inner arc after passing through the automatic queuing device 2; for the arc-shaped permanent ferrite 6 products of other shapes, they can be adjusted to their corresponding preset posture according to the needs of magnetization.

[0079] As a preferred embodiment, the automatic queuing device 2 includes a box body 21 and a mounting seat 22;

[0080] The box body 21 is a shell with openings at both ends, and the cross section of the box body 21 is a shape that matches the preset posture of the permanent ferrite 6 product;

[0081] The mounting seat 22 is blocked at one end opening of the box body 21, and the discharging port 23 is provided at the end of the mounting seat 22 of the box body 21, and the discharging port 23 is arranged through the box body 21; and in the present embodiment, the discharging port 23 includes a pushing port and a discharging port, the pushing port and the discharging port are arranged opposite to each other, the cross-sectional area of ​​the discharging port is larger than the cross-sectional area of ​​the pushing port, and the pushing port is used for the push rod of the feeding device 4 to extend therein, so as to push the permanent ferrite 6 product arranged in the box body 21 through the discharging port to the magnetizing device 31;

[0082] A feed port 24 is also provided at the end of the mounting seat 22 away from the box body 21, and the feed port 24 is arranged on the surface of the box body 21 facing the unloading end of the first conveying device 1; with such an arrangement, the permanent magnet ferrite 6 product arranged on the first conveying device 1 falls into the feed port 24 of the box body 21 by its own weight after coming out from the unloading end, and is arranged into a preset posture under the constraint of the internal shape of the box body 21, and the whole structure is simple and compact.

[0083] As a preferred embodiment, grooves 25 that penetrate the inner cavity of the box body 21 are also provided on both side surfaces of the box body 21, and the grooves 25 are arranged along the vertical direction of the box body 21. The arrangement of the grooves 25 prevents the permanent magnet ferrite 6 product from flipping over when it falls under its own weight, so as to ensure that the product falls in a preset posture.

[0084] As a preferred embodiment, the magnetizing device 31 includes a magnetizing bracket 311 and a magnetizing magnet 312 with adjustable magnetic force disposed on the upper portion of the magnetizing bracket 311;

[0085] The magnetizing bracket 311 is provided with a conveying channel 313 for conveying the permanent ferrite 6 product, and the magnetizing magnet 312 is provided at any position above the conveying channel 313, and there is a gap between the magnetizing magnet 312 and the conveying channel 313, so as to weakly magnetize the permanent ferrite 6 product passing therethrough; the magnetic flux testing device 32 is provided below the conveying channel 313 and directly opposite to the magnetizing magnet 312;

[0086] For the magnetizing magnet 312 with adjustable magnetic force, when the magnetizing magnet 312 is an electromagnet, the magnetizing device 31 further includes a magnetizing controller connected to the electromagnet, and the magnetizing controller is used to control the magnetic force of the magnetizing magnet 312;

[0087] For the magnetizing magnet 312 with adjustable magnetic force, when the magnetizing magnet 312 is a permanent magnet with fixed magnetic force, the magnetizing magnet 312 with different magnetic force is replaced according to the coercive force of the permanent ferrite 6 product to be tested. The present invention uses the magnetizing magnet 312 with adjustable magnetic force to weaken the magnetism of the permanent ferrite 6 products with different coercive forces. While satisfying the qualification test, the residual magnetism in the permanent ferrite 6 product after the test can be controlled within the allowable range, without the need for additional demagnetization equipment.

[0088] As a preferred embodiment, the magnetizing bracket 311 includes a bracket body and a magnet bracket mounted on the bracket body, the magnet bracket is used to support and place the magnetizing magnet 312, and is provided with an opening toward the conveying channel 313 for magnetic lines of force to pass through to magnetize the permanent ferrite 6 product; such a configuration allows a gap to exist between the magnetizing magnet 312 and the permanent ferrite 6 product passing therethrough so as to offset the weak magnetism thereof;

[0089] The conveying channel 313 is arranged on the bracket body, and a magnetic flux testing device installation groove 25 is also arranged on the bracket body directly below the conveying channel 313, for installing the magnetic flux testing device 32; such a setting facilitates the installation of the magnetizing magnet 312 and the magnetic flux testing device, making the detection device provided by the present invention simple and compact.

[0090] As a preferred embodiment, the magnetic flux testing device 32 includes a measuring coil 321, a fluxmeter 322 electrically connected to the measuring coil 321, and a magnetic flux testing controller; the measuring coil 321 is arranged opposite to the magnetizing device 31, and is used to perform a magnetic flux test on the permanent ferrite 6 product currently magnetized; in this embodiment, the measuring coil 321 is arranged below the conveying channel 313 and opposite to the magnetizing magnet 312.

[0091] As a preferred embodiment, the magnetic flux testing device 32 further includes a buzzer alarm 323, which is electrically connected to the flux meter 322 and the magnetic flux testing controller, respectively, and is used to generate a buzzer alarm for the permanent ferrite 6 product that exceeds / is lower than the preset magnetic flux; so as to remind the operator to promptly remove unqualified products;

[0092] In some preferred embodiments, the magnetic flux testing device 32 further includes a marking device, which is electrically connected to the flux meter 322 and the magnetic flux testing controller, respectively, and is used to mark the permanent ferrite 6 products exceeding / lower than a preset magnetic flux for subsequent rejection.

[0093] As a preferred embodiment, the unloading end of the magnetizing device 31 is also provided with a second conveying device 5 for conveying the tested permanent ferrite 6 products. The setting of the first conveying device 1 and the second conveying device 5 enables the entire detection process to be automated without excessive manual intervention, thereby improving the detection efficiency.

[0094] As a preferred embodiment, the performance testing device 3 is further provided with a reject mechanism, and the reject mechanism is communicatively connected with the magnetic flux test controller. When the magnetic flux test controller determines that the tested permanent ferrite 6 product exceeds / is lower than the preset magnetic flux, the reject mechanism is actuated to reject unqualified products.

[0095] In some embodiments, a reject mechanism is provided on the second conveying device 5, and the reject mechanism is electrically connected to the marking device for rejecting marked defective products, thereby ensuring the qualified rate of shipped products.

[0096] As a preferred embodiment, the feeding device 4 includes a linear drive and a push rod arranged at the execution end of the linear drive, and the push rod is used to extend into the automatic queuing device 2 to push the permanent magnet ferrite 6 product therein to the magnetizing device 31; the linear drive includes but is not limited to a cylinder or an electric push rod. In the present embodiment, the linear drive is a cylinder, and a push plate is provided at the rod cavity end of the cylinder. The cylinder drives the push plate to move to extend into the inner part of the box body 21 to push the permanent magnet ferrite 6 product, thereby realizing automatic loading to the performance testing device 3.

[0097] Embodiment 2:

[0098] The present invention also provides a method for detecting unqualified permanent ferrite products, the steps of which include:

[0099] S1: The permanent ferrite magnets 6 are arranged in sequence on the first conveying device 1, and the first conveying device 1 conveys the permanent ferrite magnets 6 to the feed port 24 of the automatic queuing device 2;

[0100] S2: The permanent ferrite 6 products are arranged into a preset posture under the action of their own weight and the constraints of the automatic queuing device 2, and are arranged in the automatic queuing device 2 from top to bottom. In this embodiment, for the arc-shaped permanent ferrite 6 products, the preset posture is a state of being placed with the inner arc facing the product.

[0101] S3: starting the feeding device 4 arranged at the discharge end of the automatic queuing device 2, and the feeding device 4 sequentially pushes the permanent ferrite 6 products to be tested in the automatic queuing device 2 to the performance testing device 3;

[0102] S4: When the permanent ferrite 6 product is pushed to the bottom of the magnetizing device 31, the magnetizing device 31 weakly magnetizes the permanent ferrite 6 product along the first direction according to the preset magnetic field, and starts the magnetic flux testing device at the same time. The magnetic flux testing device 32 synchronously performs a relative magnetic flux test on the permanent ferrite 6 product that is currently weakly magnetized along the second direction. When the relative magnetic flux is detected to be within the preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as a failed product;

[0103] The preset magnetic field can be adjusted according to the coercive force of the permanent ferrite 6 product to be tested to ensure that the residual magnetism in the permanent ferrite 6 product after the test is within the allowable range (such as 50Gs) on the basis of being able to effectively test whether the permanent ferrite 6 product is qualified;

[0104] The permanent ferrite 6 products judged as unqualified products are rejected manually or by a rejection mechanism; the permanent ferrite 6 products judged as qualified products are transported to the corresponding collection device by a second transport mechanism in some embodiments.

[0105] It should be noted that the magnetizing magnetic field of the traditional permanent ferrite 6 product needs to reach 3-5 times the coercive force in the product before it can be saturated magnetized (the coercive force of the normal product is about 4000Oe, and the magnetic field needs to reach 12000-20000Gs). The weak magnetic field described in the present invention uses the magnetized permanent ferrite 6 magnet to magnetize the permanent ferrite 6 to be tested, and there is an air gap in the middle part, so the magnetic field generated by the magnetizing magnet 312 is only a few hundred Gs. Therefore, after the magnetic force of the magnetizing magnet 312 is cancelled, the residual magnetism in the tested permanent ferrite 6 product is within the allowable range, and no additional demagnetization equipment is required to demagnetize it.

[0106] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A device for detecting defective permanent ferrite products, characterized in that: include: A first conveying device, used for conveying the permanent ferrite product to be tested; An automatic queuing device, arranged at the unloading end of the conveying device, for arranging the permanent ferrite products into a preset posture; A performance testing device is arranged at the discharge port of the automatic queuing device, and includes a magnetizing device and a magnetic flux testing device. The magnetic flux testing device is matched with the magnetizing device, and the magnetizing device is used to weakly magnetize the permanent ferrite product along a first direction; the magnetic flux testing device is used to synchronously perform a relative magnetic flux test on the permanent ferrite product currently weakly magnetized along a second direction; the magnetic force of the magnetizing device can be adjusted; and the magnetizing device includes a magnetizing bracket, and a magnetizing magnet with adjustable magnetic force arranged on the upper part of the magnetizing bracket; a conveying channel for conveying the permanent ferrite product is arranged on the magnetizing bracket, and the magnetizing magnet is arranged at any point above the conveying channel, and there is a gap between the magnetizing magnet and the conveying channel, which is used to weakly magnetize the permanent ferrite product passing through here; the magnetic flux testing device is arranged below the conveying channel and is arranged directly opposite to the magnetizing magnet; A feeding device, disposed at the discharge end of the automatic queuing device, for pushing the permanent ferrite product to the performance testing device; The magnetizing bracket comprises a bracket body and a magnet bracket mounted on the bracket body. The magnet bracket is used to support and place the magnetizing magnet and is provided with an opening toward the conveying channel for magnetic lines of force to pass through so as to magnetize the permanent ferrite product.

2. A device for detecting defective permanent ferrite products according to claim 1, characterized in that: The automatic queuing device is a strip-shaped box body, which is vertically arranged between the first conveying device and the performance testing device, so that the permanent ferrite product passing through it reaches the performance testing device in a preset posture; And the plane where the first conveying device is located is higher than the plane where the performance testing device is located.

3. A device for detecting defective permanent ferrite products according to claim 2, characterized in that: The automatic queuing device comprises a box body and a mounting seat; The box body is a shell with openings at both ends, and the cross section of the box body is a shape that matches the preset posture of the permanent magnet ferrite product; The mounting seat is blocked at an opening at one end of the box body, and the mounting seat end of the box body is provided with the discharge port, and the discharge port is arranged through the box body; A feed port is also provided at the mounting seat end away from the box body, and the feed port is arranged on the surface of the box body facing the unloading end of the first conveying device.

4. A device for detecting defective permanent ferrite products according to any one of claims 1 to 3, characterized in that: The magnetic flux testing device comprises a measuring coil, a fluxmeter electrically connected to the measuring coil, and a magnetic flux testing controller; the measuring coil is arranged opposite to the magnetizing device and is used to perform a magnetic flux test on the permanent ferrite product currently being magnetized.

5. A device for detecting defective permanent ferrite products according to claim 4, characterized in that: The magnetic flux testing device further comprises a buzzer alarm, which is electrically connected to the flux meter and the magnetic flux testing controller respectively, and is used to generate a buzzer alarm for a permanent ferrite product that exceeds / is below a preset magnetic flux.

6. A device for detecting defective permanent ferrite products according to any one of claims 1 to 3, characterized in that: The feeding device comprises a linear drive and a push rod arranged at the execution end of the linear drive, and the push rod is used to extend into the automatic queuing device to push the permanent ferrite product therein to the magnetizing device.

7. A method for detecting a permanent ferrite performance defective product detection device as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1: The permanent magnet ferrite products are arranged in sequence on a first conveying device, and the first conveying device conveys the permanent magnet ferrite products to a feed port of an automatic queuing device; S2: the permanent ferrite products are arranged into a preset posture under their own weight and under the constraint of the automatic queuing device, and are arranged in the automatic queuing device from top to bottom in sequence; S3: starting a feeding device arranged at the discharge end of the automatic queuing device, wherein the feeding device sequentially pushes the permanent ferrite products to be tested in the automatic queuing device to the performance testing device; S4: When the permanent ferrite product is pushed to the bottom of the magnetizing device, the magnetizing device weakly magnetizes it according to the preset magnetic field, and starts the magnetic flux testing device at the same time to perform a relative magnetic flux test on the weakly magnetized permanent ferrite product. When it is detected that the relative magnetic flux in the magnetized permanent ferrite product is within the preset magnetic flux range, it is judged as a qualified product, otherwise it is judged as an unqualified product.

8. The detection method according to claim 7, characterized in that: The preset magnetic field can be adjusted according to the coercive force of the permanent ferrite product to be tested.

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