CN102101110A - Magnet sorting device - Google Patents

Abstract

A magnet sorting apparatus comprising: the device comprises a rack, a conveying track, a magnet detection probe, a camera, a data processor, a control circuit and a sorting device; the conveying track is arranged on the rack and is connected with the motor, and the motor drives the conveying track to operate; the laser detection head is arranged above the rack; the device also comprises a first laser detection head and a second laser detection head which are symmetrically fixed on two sides of the conveying track; the magnet detection probe, the control circuit, the first laser detection head and the second laser detection head are respectively connected with the data processor; the sorting device is connected with the control circuit. The projection size of the magnet on an X-Y plane is measured through a camera, the height of the magnet is measured through a laser detection head, unqualified products are removed through a sorting device, and one-time measurement and sorting of the three-dimensional size of the magnet are achieved.

Description

Magnet sorting device

technical field

The invention relates to a sorting device, in particular to a magnet sorting device.

Background technique

Rare earth permanent magnets are indispensable functional materials in modern industry. In the production of rare earth permanent magnets, it is necessary to measure the dimensional parameters such as the inner and outer diameters and heights of the rare earth permanent magnets before packing and shipping the magnets. Due to the large number of magnets, the precise measurement of the size of the magnets has always been a technical problem that plagues the industry. In actual production, the method of manual sampling inspection is implemented on the magnets. As long as the results of the sampling inspection are within a reasonable range, the batch of magnets is considered qualified. This method has obvious defects. First, the manual method is prone to errors. In addition, due to the random inspection method, unqualified magnets may be missed. In recent years, with the widespread use of precision motors, micro motors, precision sensors, etc., electronic components are developing towards miniaturization and precision, which puts forward more requirements on the parameters such as the size and tolerance of the driving magnets used in them. In order to meet the strict requirements, the size of the magnets can no longer be met by random inspection.

The Chinese invention patent with the application number of 200320108282.4 discloses a manual high-precision inner hole optical detector, which includes a CCD camera, a fixture, a microscope, an adapter mirror and a display, wherein the display is connected to the CCD camera, and the screen of the display There are several parallel scale lines on the surface, and the workpiece is enlarged and detected by the plan achromatic microscope objective lens with long working distance, and the image of the workpiece enlarged by the objective lens is input to the CCD camera through the distortion-free adapter lens, and the camera will The image is input to the monitor, so that the image is presented on the monitor, and the workpiece and the scale line on the surface of the monitor screen are manually read the data of the inner and outer diameters of the workpiece with tiny inner holes. This technique has the following disadvantages:

1. Magnets must be placed manually, which is not conducive to mass operations;

2. Only the inner and outer diameters of the magnet can be measured, and the height of the magnet cannot be measured at the same time, that is, it can only measure the projection size of the X-Y plane, that is, the plane where the workpiece is located, and cannot simultaneously measure the size of the Z-axis direction, that is, the direction of the central axis of the workpiece;

3. Magnet size data still rely on manual reading and recording.

The applicant's application number is "200810207927.7", a Chinese invention patent application, which proposes a magnet size automatic measurement and sorting device, which includes a CCD camera, an image processing unit connected to it, and a PLC control circuit. The magnet is photographed by the CCD camera Image information, the image processing unit processes the obtained image information, and judges whether the size of the magnet is within the qualified range by comparing with the set value. If the size of the magnet is unqualified, the PLC control circuit will start the sorting device and will not Qualified magnets are rejected, so as to realize the automatic measurement and sorting of the inner and outer diameters of the magnets.

This invention can only realize the measurement and sorting of the projected size of the X-Y plane, but cannot measure the height or length of the magnet along the Z-axis direction. For example, for a ring-shaped magnet, only the inner and outer diameters of the magnet can be measured, and the height of the magnet cannot be measured at the same time.

Contents of the invention

The technical problem to be solved by the present invention is that the magnet sorting device in the prior art cannot measure the height of the magnet in the direction of the central axis, so that it cannot detect whether the height of the magnet meets the requirements.

In order to solve the above technical problems, the present invention provides a magnet sorting device, including: a frame, a conveying track, a magnet detection probe, a camera, a data processor, a control circuit and a sorting device;

The conveying track is arranged on the frame, and the conveying track is connected with a motor, and the motor drives the conveying track to run;

The magnet detection probe and the camera are arranged above the frame;

The magnet detection probe, the control circuit, and the camera are respectively connected to the data processor;

The sorting device is connected to the control circuit;

It also includes a first laser detection head and a second laser detection head, symmetrically fixed on both sides of the conveying track, and connected to the data processor.

Optionally, the sorting device includes: a cylinder and a pneumatic pusher;

The cylinder is fixed on one side of the frame and connected with the control circuit;

The pneumatic pusher is arranged on the conveying track and connected with the cylinder;

Optionally, the conveying track is straight;

Optionally, a bracket is also included, fixed on the frame, and the camera is fixed on the bracket;

Optionally, a light source is also included, fixed on the bracket and connected to the control circuit;

Optionally, the camera is a CCD camera;

Optionally, the light source is an LED light source or a fluorescent lighting light source;

Optionally, the magnet detection probe is an infrared detection head;

Optionally, a display connected to the data processor is also included;

Optionally, the control circuit is a PLC control circuit.

The magnet sorting device of the present invention adds the first laser detection head and the second laser detection head on the basis of the prior art, can detect the height of the magnet, and solves the problem that the magnet sorting device of the prior art cannot detect the height of the magnet at the same time, thereby The disadvantage of not being able to determine whether the magnet height meets the requirements.

Description of drawings

Fig. 1 is a side structural schematic view of a magnet sorting device according to a specific embodiment of the present invention;

Fig. 2 is a schematic top view of a magnet sorting device according to a specific embodiment of the present invention shown in Fig. 1; and

Fig. 3 is a schematic diagram of the working principle of the first laser detection head and the second laser detection head according to the specific embodiment of the present invention.

Detailed ways

The magnet sorting device of the specific embodiment of the present invention adds a pair of laser detection heads on the basis of the prior art, which can detect the height of the magnet, and solves the problem that the magnet sorting device of the prior art cannot detect the height of the magnet at the same time, so that it cannot be determined The disadvantage of whether the height of the magnet meets the technical requirements.

In order to enable those skilled in the art to understand the spirit of the present invention more clearly and accurately, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic side structure diagram of a magnet sorting device according to a specific embodiment of the present invention, and Fig. 2 is a schematic top view of the magnet sorting device according to a specific embodiment of the present invention shown in Fig. 1 . With reference to Fig. 1, Fig. 2, the magnet sorting device of the present invention comprises: frame 100, conveying track 101, magnet detection probe 104, first laser detection head 105a, second laser detection head 105b, camera 106, data processor 112 , a control circuit 111 and a sorting device. in:

The delivery track 101 is arranged on the frame 100, and the delivery track 101 is connected with the motor 102, and the delivery track 101 is driven by the motor 102, and the motor 102 is arranged below the frame 100; wherein, the delivery track 101 can adopt a straight line Shape, ring, etc. In this embodiment, the linear conveying track 101 is preferably used, which is suitable for flow operation and saves manufacturing costs, and is convenient for operation.

The magnet detection probe 104 and the camera 106 are arranged above the frame 100, and the first laser detection head 105a and the second laser detection head 105b are symmetrically fixed on both sides of the conveying track 101; in this specific embodiment, the present invention The magnet sorting device also includes a bracket 103 fixed on the frame 100 , and the camera 106 is fixed on the bracket 103 .

The magnet detection probe 104 , the first laser detection head 105 a , the second laser detection head 105 b , the control circuit 111 , and the camera 106 are respectively connected to the data processor 112 .

The sorting device is connected to the control circuit 111. After the data processor 112 outputs the sorting control signal, the control circuit 111 receives the sorting control signal and controls the sorting device to perform a sorting operation, so as to Sorting out unqualified products. Wherein, the sorting device includes: a cylinder 108, a pneumatic pusher 109; the cylinder 108 is fixed on one side of the frame 100 and connected with the control circuit 111, and the cylinder 108 is communicated with a high-pressure air source through an interface 110, and the high-pressure The air source supplies gas to the cylinder 108; the pneumatic pusher 109 is arranged on the conveying track 101 and connected to the cylinder 108; the cylinder 108 is controlled by the control circuit 111 to control the movement of the pneumatic pusher 109. In this specific embodiment, the camera 106 is a CCD camera, and in order to achieve a better imaging effect, the camera 106 preferably adopts a high-resolution CCD camera; the magnet detection probe 104 is an infrared detector, so The control circuit 111 is a PLC control circuit.

In addition, in this specific embodiment, a light source 107 is also included, which is fixed on the support 103 and connected to the control circuit 111 . The light source 107 is used to improve the quality of image information captured by the camera 106. The light source 107 can be a general product on the market, but in order to achieve a better effect, it is best to use an LED light source or a fluorescent lighting light source.

The magnet sorting device of the specific embodiment of the present invention also comprises the display 113 that is connected with described data processor 112, is used for displaying the processing information of data processor 112 on the display screen of this display 113, can make the detector clearly Understand the detected information; the data processor 112 also includes a recording component for recording the number of qualified or unqualified products, which can make the inspector clearly understand the results of the magnet detection. The display 113 may be a general computer CRT display, liquid crystal display or other monitoring equipment.

In addition, in this specific embodiment, a container for collecting unqualified products is provided at the pushing position of the pneumatic pusher 109. The specific container depends on different magnets, and simple ones such as plastic bags and plastic buckets can all be used.

Simultaneously referring to Fig. 1, Fig. 2 and Fig. 3 illustrate the working principle of the magnet sorting device of the specific embodiment of the present invention, described magnet detection probe 104 sends the signal that detects magnet when magnet 20 arrives directly ahead; After the device 112 receives the signal that the magnet is detected from the magnet detection probe 104, it starts the camera 106 to photograph the magnet detected by the magnet detection probe 104 and returns the captured image information to the data processor 112, wherein the camera 106 106 Take an orthographic projection image of the magnet, that is, the plane of the magnet, and the size of the magnet on the X-Y plane can be known by processing the information of the orthographic projection image. If the ring magnet is taken as an example, the inner and outer diameter information of the ring magnet can be known; at the same time The processor 112 controls the first laser detection head 105a to emit a laser beam with a beam width of H, controls the second laser detection head 105b to receive the laser light emitted by the first laser detection head 105a, and the received laser beam is The width is L, the difference between H and L is the height h of the magnet (that is, the height of the magnet in the axial direction), the first laser detection head 105a will send out the information of the laser beam width H, and the second laser detection probe 105b will receive The information of the laser beam width L obtained is returned to the data processor 112, and the received laser beam width information is processed by the data processor 112 to calculate the height of the magnet; the data processor 112 returns the image information And the beam width information is processed, compared with the preset data, judge, determine whether the magnet size is within the qualified range, and decide whether to output the sorting control signal according to the judgment result, when the magnet size exceeds the qualified range, the output point Select the control signal.

3 is a schematic diagram of the principle of measuring the height of a magnet by the first laser detection head 105a and the second laser detection head 105b. The magnet 20 is placed on the conveying track 101, wherein the plane of the magnet is parallel to the plane of the conveying track 101. The first laser detection The probe 105a and the second laser detection probe 105b are symmetrically fixed on both sides of the conveying track. When the magnet 20 passes through the first laser detection head 105a and the second laser detection head 105b, the first laser detection head 105a emits a laser beam with a width of H. A part of the laser beam with a width of H is blocked by the magnet 20, and the width of the blocked laser beam is the height h of the magnet, so the width L of the laser beam detected by the second laser detection head 105b is the difference between H and the height of the magnet. According to this The principle can know that when utilizing the first laser detection head 105a and the second laser detection head 105b to detect the magnet height h, the width H of the laser beam emitted by the first laser detection head 105a and the width H of the laser beam received by the second laser detection head 105b The difference in width L is the height h of the magnet.

When the magnet sorting device of the present invention detects magnets, it can be divided into two situations:

1. When the size parameter of the magnet exceeds the preset range, the size parameter may be the inner and outer diameter parameters of the magnet, or the height parameter of the magnet, or both of them exceed the preset range at the same time, the data processor 112 sends a sorting control The signal is sent to the control circuit 111, and the control circuit 111 starts the action of the cylinder 108 after receiving the information. The high-pressure air source enters the cylinder 108 through the interface 110, and the pneumatic pusher 109 pushes the bad magnet to the place where the unqualified product is collected under the push of the gas in the cylinder 108. in the container.

2. When the dimension parameters of the magnet are within the allowable range, the magnet will continue to move along with the conveying track 101, so as to carry out the next process.

In this way, the magnet sorting device of the present invention can continuously realize the automatic measurement, recording and sorting of the three-dimensional dimensions of the magnets, and can detect not only the plane dimensions of the magnets but also the height of the magnets.

The invention can realize the automatic measurement and sorting of the three-dimensional size parameters of the magnet at the same time. For the ring-shaped magnet, it can accurately measure the inner and outer diameter and height data of the magnet at one time, and realize automatic sorting, effectively avoiding the artificial factors. error.

The present invention can be used for measuring the three-dimensional dimension of the circular magnet and sorting the circular magnet, and can also be used for measuring the three-dimensional dimension of the cylindrical magnet to realize the automatic sorting of the cylindrical magnet. Moreover, the applicable object of the present invention is not limited to magnets, and it is also applicable to the automatic measurement of three-dimensional dimensions of small pieces of magnets with regular shapes, such as nuts and the like.

It can be understood that, the detailed description of the above embodiments is for illustrating and explaining the principles of the present invention rather than limiting the protection scope of the present invention. On the premise of not departing from the gist of the present invention, those skilled in the art can make modifications, changes and changes on the basis of these embodiments based on the understanding of the principles taught by the above technical solutions. The scope of protection of the present invention is therefore defined by the appended claims and their equivalents.

Claims (10)

1. A magnet sorting device, comprising: frame, conveying track, magnet detection probe, camera, data processor, control circuit and sorting device; Wherein, The conveying track is arranged on the frame, and the conveying track is connected with a motor, and the motor drives the conveying track to run; The magnet detection probe and the camera are arranged above the frame; The magnet detection probe, the control circuit, and the camera are respectively connected to the data processor; The sorting device is connected to the control circuit; It is characterized in that it also includes a first laser detection head and a second laser detection head, symmetrically fixed on both sides of the conveying track, and connected with the data processor. 2. The magnet sorting device according to claim 1, wherein the sorting device comprises: a cylinder and a pneumatic pusher; The cylinder is fixed on one side of the frame and connected with the control circuit; The pneumatic pusher is arranged on the conveying track and connected with the cylinder. 3. The magnet sorting device according to claim 2, wherein the conveying track is linear. 4. The magnet sorting device according to claim 3, further comprising a bracket fixed on the frame, and the camera is fixed on the bracket. 5. The magnet sorting device according to claim 4, further comprising a light source fixed on the support and connected to the control circuit. 6 . The magnet sorting device according to claim 1 , wherein the camera is a CCD camera. 7. The magnet sorting device according to any one of claims 1 to 5, wherein the light source is an LED light source or a fluorescent lighting light source. 8. The magnet sorting device according to any one of claims 1 to 5, characterized in that, the magnet detection probe is an infrared detection head. 9. The magnet sorting device according to claim 1, further comprising a display connected to the data processor. 10. The magnet sorting device according to claim 1, wherein the control circuit is a PLC control circuit.

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