Part screening machine

Abstract

The utility model discloses a part screening machine which comprises a vibration disc, a feeding device, a discharging device and a screening device. The rotating device drives the rotating disc to rotate, the rotating disc is in butt joint with the discharging channel, and the parts are driven by the rotating disc to have an arc-shaped walking path; the eddy current sensor has a sensing direction pointing to the walking path; the number of the optical imaging instruments is multiple, the multiple optical imaging instruments are sequentially arranged at intervals along the edge of the rotating disc, and each optical imaging instrument is provided with a camera facing the walking path; and the number of the blanking devices is two, the two blanking devices are sequentially arranged at intervals along the edge of the rotating disc, all the blanking devices are located at the downstream of the eddy current sensor and the optical imager, and each blanking device is provided with a collecting container and an air nozzle facing the walking path. According to the part screening machine, all defective products can be automatically screened out through the part screening machine, parts which are not subjected to heat treatment can also be screened out through the part screening machine, the screening efficiency is effectively improved, and the screening accuracy is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of screening, and in particular to a parts screening machine. Background Technology

[0002] Currently, the screening of parts processing quality generally uses sampling inspection. Taking screws as an example, during sampling inspection, a batch of screws is grouped together, and a number of screws are randomly selected for testing. The testing indicators include, but are not limited to, thread profile, screw head size, and processing defects. If the sampling pass rate does not meet the standard, then each screw in the batch needs to be tested individually to filter out all defective products. However, this screening method will inevitably have omissions, is time-consuming and labor-intensive, and cannot filter out screws that have not undergone heat treatment. Therefore, there is an urgent need to develop a general screening device to filter out all defective products. Utility Model Content

[0003] The present invention aims to provide a parts screening machine that can automatically filter out all defective products.

[0004] The parts screening machine according to a first aspect embodiment of the present invention includes:

[0005] A vibratory feeder, which is equipped with a discharge channel;

[0006] A rotating device is driven by a turntable, which is connected to the discharge channel. The linear velocity of the turntable is greater than the discharge velocity of the vibratory feeder. The vibratory feeder outputs parts one by one to the turntable, and the parts have an arc-shaped travel path under the drive of the turntable.

[0007] An eddy current sensor having a sensing direction pointing toward the walking path;

[0008] The optical imager is provided in multiple units, which are arranged sequentially at intervals along the edge of the turntable. Each optical imager is equipped with a camera facing the walking path, and all cameras have different shooting angles.

[0009] The material feeding device is provided in two, and the two material feeding devices are arranged sequentially at intervals along the edge of the turntable. All material feeding devices are located downstream of the eddy current sensor and the optical imager. Each material feeding device is provided with a collection container and an air nozzle facing the travel path. The air nozzle and the collection container are respectively located on both sides of the travel path.

[0010] The controller is electrically connected to the rotating device, the eddy current sensor, the optical imager, and the unloading device, respectively.

[0011] The parts screening machine according to the embodiments of this utility model has at least the following beneficial effects: When parts need to be screened, multiple parts are first placed into a vibratory feeder and the vibratory feeder is started. The vibratory feeder drives multiple parts to be output one by one along the discharge channel to the turntable. Since the linear velocity of the turntable is greater than the discharge velocity of the vibratory feeder, the turntable can transport the received parts at intervals to avoid parts from piling up. The parts move along a predetermined walking path under the drive of the turntable. During the rotation of the turntable, the eddy current sensor determines whether the part has undergone heat treatment by detecting the conductivity of the part, while multiple optical imagers detect the appearance quality indicators of the parts through image recognition technology. Since all electrical control devices are electrically connected to the controller, when the first detection element detects a part, the controller... The device labels the part, and because the turntable has a constant rotation speed, the part's trajectory can be tracked in real time. If any defect is detected in the part, when the part moves to one of the unloading devices, the corresponding nozzle of the unloading device will spray high-pressure gas to blow the defective part into the corresponding collection container. If no defect is detected in the part, when the part moves to another unloading device, the corresponding nozzle of the unloading device will spray high-pressure gas to blow the qualified part into the corresponding collection container. Compared with the prior art, this utility model can automatically filter out all defective products through the parts screening machine, and can also filter out parts that have not undergone heat treatment, effectively improving screening efficiency and significantly improving screening accuracy.

[0012] According to some embodiments of this utility model, the turntable is a transparent material component to facilitate imaging by the optical imager.

[0013] According to some embodiments of this utility model, all optical imagers are located on the upper side of the turntable, and multiple light sources are provided on the lower side of the turntable to facilitate imaging by the optical imagers.

[0014] According to some embodiments of this utility model, specifically, the optical imager is a CCD camera.

[0015] According to some embodiments of the present invention, in order to raise the height of the turntable, the parts screening machine further includes a first support platform, the rotating device is installed on the surface of the first support platform, and the eddy current sensor, optical imager and unloading device are all fixedly connected to the first support platform.

[0016] According to some embodiments of this utility model, each of the optical imagers is connected to a mounting bracket, which is fixedly connected to the first support platform. The relative position between the optical imager and the mounting bracket is adjustable. Because the relative position between the optical imager and the mounting bracket is adjustable, the shooting angle of the optical imager can be adjusted for different parts, thereby meeting the shooting requirements of different parts.

[0017] According to some embodiments of the present invention, in order to increase the height of the vibratory feeder, the parts screening machine further includes a second support platform, and the vibratory feeder is mounted on the surface of the second support platform.

[0018] According to some embodiments of this utility model, the number of the feeding devices is three, and the three feeding devices are arranged sequentially at intervals along the edge of the turntable. One feeding device is used to collect qualified parts, another feeding device is used to collect parts with appearance defects, and the last feeding device is used to collect parts that meet the appearance quality indicators but have not undergone heat treatment.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the parts screening machine provided in this embodiment of the utility model;

[0022] Figure 2 yes Figure 1 The top view of the parts sorting machine shown.

[0023] In the attached diagram: 100-vibratory feeder, 200-rotating device, 300-eddy current sensor, 400-optical imager, 500-feeding device, 210-first support platform, 110-second support platform, 220-turntable, 120-discharge channel, 310-bracket, 410-mounting bracket, 420-light source, 510-support frame, 520-collection container, 530-air nozzle, 540-feeding hood. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] like Figure 1 and Figure 2 As shown, the parts sorting machine according to the first aspect of the present invention includes a vibratory plate 100, a rotating device 200, an eddy current sensor 300, an optical imager 400, and a material feeding device 500. The rotating device 200 is mounted on the surface of the first support platform 210 to raise the height of the rotating device 200. Correspondingly, the vibratory plate 100 is mounted on the surface of the second support platform 110 to raise the height of the vibratory plate 100, making it convenient for workers to stand and operate.

[0029] The vibratory feeder 100 can utilize existing technology, with a pulse electromagnet located beneath its hopper. This electromagnet causes the hopper to vibrate vertically, and an inclined spring plate drives the hopper to oscillate around its vertical axis. Parts within the hopper, subjected to this vibration, rise along a spiral channel. During this ascent, they undergo a series of track selections or posture changes, allowing them to automatically enter the assembly or processing position in a uniform state according to assembly or processing requirements. This automatically and orderly aligns and accurately transports disordered parts to the next process step.

[0030] The rotating device 200 can be a stepper motor or a servo motor, which has a controllable rotation speed. The rotating part of the rotating device 200 is connected to the turntable 220 through a connector. The turntable 220 rotates under the drive of the rotating device 200. In order to realize the docking between the vibratory feeder 100 and the turntable 220, the vibratory feeder 100 extends a discharge channel 120 from the end of the spiral channel. The vibratory feeder 100 and the turntable 220 are docked through the discharge channel 120, so that the vibratory feeder 100 can transport the parts one by one to the turntable 220 through the discharge channel 120. At this time, the parts have an arc-shaped travel path under the drive of the turntable 220.

[0031] Furthermore, to prevent parts from clustering on the turntable 220, the linear velocity of the turntable 220 is greater than the discharge velocity of the vibratory feeder 100. Assuming the discharge velocity of the vibratory feeder 100 is a, then the linear velocity of the parts on the turntable 220 is at least twice a, so that the turntable 220 can transport the parts it receives at intervals, so that the parts can be inspected individually in the subsequent inspection process.

[0032] On the other side, an eddy current sensor 300 is mounted on a bracket 310, which is fixedly connected to the surface of the first support platform 210 via a connector. The bracket 310 is located beside the travel path, and the eddy current sensor 300 has a sensing direction pointing towards the travel path. Whenever the turntable 220 moves a part past the eddy current sensor 300, the eddy current sensor 300 can detect the conductivity of each passing part. Since the hardness of a material is closely related to its internal microstructure, the hardness and strength of a material change after heat treatment. These changes lead to corresponding changes in the electromagnetic properties of the material (such as conductivity and permeability). When the probe of the eddy current sensor 300 approaches the material being measured, the coil inside the sensor generates a high-frequency alternating magnetic field. This magnetic field induces eddy currents within the material, and the size and distribution of these eddy currents are related to the electromagnetic properties of the material being measured. In other words, since the electromagnetic properties of a part change after heat treatment, the size and distribution of the eddy currents in the part can be measured by the eddy current sensor 300 to determine whether the part has undergone heat treatment.

[0033] For orders with requirements for hardness and strength, parts that have not undergone heat treatment are defined as defective. However, these defective parts have the potential to become good products after undergoing heat treatment and re-screening, without needing to be reworked.

[0034] On the other side, multiple optical imagers 400 are provided, each connected to a mounting bracket 410. All mounting brackets 410 are fixedly connected to the surface of the first support platform 210 via connectors, and all mounting brackets 410 are located beside the travel path. Multiple mounting brackets 410 are arranged sequentially at intervals along the edge of the turntable 220. Each optical imager 400 is equipped with a camera facing the travel path, and all cameras have different shooting angles to capture images of different positions of the parts. The optical imagers 400 can be located upstream or downstream of the eddy current sensor 300. In this embodiment, the optical imagers 400 are located downstream of the eddy current sensor 300.

[0035] Assuming this embodiment divides the outer contour of the part into four detection areas A, B, C, and D, four optical imagers 400 are needed to capture images of each of these four areas. The optical imagers 400 use image recognition technology to generate feature maps, which are then compared with standard feature maps to detect the part's appearance quality indicators. If the part to be screened is a screw, then the screw's appearance quality indicators include, but are not limited to, thread profile, head size, and machining defects.

[0036] Specifically, the optical imager 400 can be a CCD camera. A CCD camera is a semiconductor device used to capture images. It consists of thousands of photosensitive elements, which can generate charges proportional to the intensity of light shining on them. When light shines on the CCD chip, photogenerated charges are generated. These charges are transferred line by line to the storage cells, eventually forming an image. In other words, a CCD camera can convert optical signals into electronic signals to record images. Since the optical imager 400 is a CCD camera, it needs to be provided with sufficient light. For this purpose, the turntable 220 is made of a transparent material, including but not limited to glass or acrylic. All optical imagers 400 are located on the upper side of the turntable 220, and multiple light sources 420 are provided on the lower side of the turntable 220. The light sources 420 provide light to the optical imagers 400 to facilitate imaging.

[0037] It is understandable that the number of optical imagers 400 may exceed the inspection area of ​​the part to be photographed. In actual work, if the number of optical imagers 400 exceeds the inspection area of ​​the part to be photographed, then simply turning off the extra optical imagers 400 will avoid interference.

[0038] In addition, to accommodate the shooting requirements of different components, the number of optical imagers 400 is generally redundant, and the relative position between the optical imagers 400 and the mounting bracket 410 is adjustable. In this embodiment, the optical imagers 400 and the mounting bracket 410 are connected by a ball joint. When it is necessary to adjust the shooting angle of the camera, the ball joint is first unlocked, then the position of the camera is adjusted as needed, and finally the ball joint is locked again, thereby meeting the shooting requirements of different components.

[0039] On the other side, there are two unloading devices 500, each equipped with a support frame 510. All support frames 510 are fixedly connected to the surface of the first support platform 210 via connectors, and all support frames 510 are located beside the travel path. All support frames 510 are arranged sequentially at intervals along the edge of the turntable 220. All unloading devices 500 are located downstream of the eddy current sensor 300 and the optical imager 400. Each unloading device 500 is equipped with a collection container 520 and an air nozzle 530 facing the travel path. The air nozzle 530 is located inside the travel path, and the collection container 520 is located outside the travel path. The air nozzle 530 is connected to the support frame 510, and is connected to a compressed air pipe and controlled by a solenoid valve. Whenever the solenoid valve is opened, compressed air in the compressed air pipe is ejected from the air nozzle 530 to blow the corresponding part into the collection container 520. In addition, the support frame 510 is connected to a drop hood 540 above the collection container 520. The parts blown away by the air nozzle 530 will first collide with the drop hood 540 and then enter the collection container 520 along the drop hood 540.

[0040] Finally, in order to achieve automated screening, the parts screening machine also includes a controller (not shown in the attached figure). The controller includes, but is not limited to, a central processing unit, a PLC or a microcontroller. The controller is electrically connected to the rotating device 200, the eddy current sensor 300, the optical imager 400 and the unloading device 500, so that the controller can output different control signals according to different detection signals.

[0041] Using the above structure, when parts need to be screened, multiple parts are first placed into the vibratory feeder 100 and the vibratory feeder 100 is started. The vibratory feeder 100 drives the multiple parts to be output one by one along the discharge channel 120 to the turntable 220. The parts move along a predetermined path driven by the turntable 220. During the rotation of the turntable 220, the eddy current sensor 300 determines whether the part has undergone heat treatment by detecting the conductivity of the part, while multiple optical imagers 400 detect the appearance quality indicators of the parts through image recognition technology. Since all electrical control devices are electrically connected to the controller, when the eddy current sensor 300 detects a part, the controller labels the part. And because the turntable 220 has a constant rotation speed, the movement trajectory of the part can be tracked in real time.

[0042] If the eddy current sensor 300 detects that a part has not undergone heat treatment, the eddy current sensor 300 will feed back the detection signal to the controller, and the controller will mark the part with a corresponding mark in the system, such as a heat treatment missing mark. If the optical imager 400 detects that a part has an appearance defect, the optical imager 400 will feed back the detection signal to the controller, and the controller will mark the part with a corresponding mark in the system, such as an appearance defect mark.

[0043] If any defect is detected in the part, when the part moves to one of the unloading devices 500, the air nozzle 530 of the corresponding unloading device 500 will spray high-pressure gas to blow the defective part into the corresponding collection container 520; if no defect is detected in the part, when the part moves to another unloading device 500, the air nozzle 530 of the corresponding unloading device 500 will spray high-pressure gas to blow the qualified part into the corresponding collection container 520.

[0044] In other embodiments, if a part meets the appearance quality indicators but is found to have not undergone heat treatment, the part is treated with heat treatment and then re-screened. If a part does not meet the appearance quality indicators, regardless of whether it has undergone heat treatment, it is reworked. To this end, the number of unloading devices 500 can be increased to three, with the three unloading devices 500 arranged sequentially and spaced apart along the edge of the turntable 220. One unloading device 500 is used to collect qualified parts, another unloading device 500 is used to collect parts with appearance defects, and the last unloading device 500 is used to collect parts that meet the appearance quality indicators but have not undergone heat treatment. The arrangement of three unloading devices 500 allows for further refinement of the classification of defective products, enabling better recycling of defective products.

[0045] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A parts screening machine characterized by, The utility model relates to a kind of automatic feeding device of electronic component, including: Vibration disc (100) is equipped with discharge channel (120); Rotating device (200) is driven with carousel (220), the carousel (220) is docked in the discharge channel (120), the linear velocity of the carousel (220) is greater than the discharge speed of the vibration disc (100), the vibration disc (100) is sequentially output to the carousel (220), the part is driven under the carousel (220) and has arc-shaped travel path; Eddy current sensor (300) has the inductive direction that points to the travel path; Optical imager (400) is equipped with multiple, multiple optical imager (400) is sequentially spaced along the edge of carousel (220), each optical imager (400) is equipped with camera towards the travel path, and all cameras have different shooting angles respectively; Material falling device (500) is equipped with two, two material falling device (500) is sequentially spaced along the edge of carousel (220), and all material falling device (500) is located downstream of the eddy current sensor (300) and optical imager (400), each material falling device (500) is equipped with collection container (520) and gas nozzle (530) towards the travel path, and the gas nozzle (530) and the collection container (520) are located at the two sides of the travel path respectively; Controller is electrically connected with rotating device (200), eddy current sensor (300), optical imager (400) and material falling device (500) respectively.

2. The part screener of claim 1, wherein: The carousel (220) is a transparent material member.

3. The part screener of claim 2, wherein: All optical imagers (400) are located on the upper side of the carousel (220), and the lower side of the carousel (220) is provided with a plurality of light sources (420).

4. The part screener of claim 1 or 3, wherein: The optical imager (400) is a CCD camera.

5. The part screener of claim 1, wherein: Further comprising a first support table (210), the rotating device (200) is installed on the surface of the first support table (210), and the eddy current sensor (300), the optical imager (400) and the material falling device (500) are fixedly connected to the first support table (210).

6. The part screener of claim 5, wherein: Each optical imager (400) is connected with a mounting bracket (410), the mounting bracket (410) is fixedly connected to the first support table (210), and the relative position between the optical imager (400) and the mounting bracket (410) is adjustable.

7. The part screener of claim 5, wherein: Further comprising a second support table (110), the vibration disc (100) is installed on the surface of the second support table (110).

8. The part screener of claim 1, wherein: The number of material falling device (500) is three, and three material falling device (500) is sequentially spaced along the edge of carousel (220).

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