Online automatic hardness sorting equipment for hubs

Abstract

The utility model provides on-line automatic hardness sorting equipment for hubs. A conveying unit comprises a rack and conveying rollers arranged on the rack; the positioning unit comprises a first positioning assembly and a second positioning assembly, the first positioning assembly comprises a first correlation sensing module, the second positioning assembly comprises a mounting support located behind the first positioning assembly, and the mounting support is provided with a linear module and a camera module arranged on the linear module. A second correlation sensing module is arranged on the linear module; the detection unit comprises a mechanical arm arranged on one side of the conveying roller and a hardness detection module arranged on the mechanical arm; when a hub is conveyed on the conveying roller, the first correlation sensing module senses the hub and stops conveying, the linear module moves downwards, the second correlation sensing module senses the height of the hub, and the camera module recognizes the type of the hub and positions the hub. The detection unit performs hardness detection according to the model and positioning of the hub so as to improve the detection efficiency and the detection precision.

Description

Technical Field

[0001] The utility model relates to an online automatic hardness sorting device and a sorting method for a wheel hub, which are applied to the field of wheel hub hardness sorting. Background Art

[0002] Wheel hub hardness sorting is an important part of wheel hub manufacturing and quality control, which ensures that the hardness of the wheel hub can meet the requirements of specific uses. Hardness testing usually uses a special hardness tester, such as a Leeb hardness tester, or selects a Brinell, Vickers or Shore hardness tester for measurement according to the material properties. According to the characteristics of the wheel hub material, a suitable test method is selected. The existing sorting methods are mainly divided into two types. One is to use an automated positioning component to fix the wheel hub and drive the wheel hub to perform Z-axis movement and rotational movement to facilitate hardness testing from different angles. The other is to use an industrial camera and a light source system to automatically identify the wheel hub model category through image recognition technology, and call the corresponding detection parameters for hardness testing according to the recognition results. However, the second method currently used for wheel hub detection has poor recognition and positioning accuracy, resulting in a large error in hardness detection, which affects its sorting efficiency. Therefore, the utility model designs a wheel hub online automated hardness sorting device and a wheel hub sorting method, which can effectively improve the efficiency of wheel hub hardness sorting. Utility Model Content

[0003] The utility model provides a hub online automatic hardness sorting device and a sorting method, which can effectively solve the above problems.

[0004] The utility model is achieved in this way:

[0005] A wheel hub online automatic hardness sorting device, comprising:

[0006] A conveying unit, used for conveying the wheel hubs and classifying the wheel hubs, comprises a frame and a conveying roller arranged on the frame;

[0007] The positioning unit includes a first positioning component and a second positioning component, wherein the first positioning component includes a first pair of photosensitive sensing modules disposed on both sides of the conveying roller, and the second positioning component includes a mounting bracket located behind the first positioning component and mounted above the conveying roller, wherein a linear module movable longitudinally and a camera module disposed on the linear module are disposed on the mounting bracket, and a second pair of photosensitive sensing modules located on both sides of the conveying roller are fixedly disposed on the linear module;

[0008] The detection unit includes a mechanical arm disposed on one side of the conveying roller, and a hardness detection module disposed on the mechanical arm;

[0009] When the wheel hub is conveyed on the conveying roller, the first pair of shooting sensor modules senses the wheel hub and stops conveying. The linear module moves downward, and the second pair of shooting sensor modules senses the height of the wheel hub. The camera module obtains the image information in the overhead state, and then identifies the wheel hub model and locates the wheel hub. The detection unit performs hardness detection according to the wheel hub model and position.

[0010] As a further improvement, the first positioning assembly includes a first fixed bracket arranged at both ends of the conveying roller, and the first radiation sensor module includes a first transmitter and a first receiver respectively arranged on the first fixed bracket.

[0011] As a further improvement, the linear module includes a fixed plate arranged on a mounting bracket, the fixed plate is provided with a guide rail movable in a vertical direction and a slider slidably arranged on the guide rail, the slider is provided with a mounting plate driven by a first motor, the mounting plate is provided with a camera module for shooting downwards, the camera module is provided with a circle of light sources in a circumferential direction, a second fixed bracket is provided on the mounting plate, and the second radiation sensor module includes a second transmitter and a second receiver arranged at both ends of the second fixed bracket.

[0012] As a further improvement, a distance sensor is provided at one end of the guide rail side wall near the top, and a sensor sheet corresponding to the distance sensor is provided on the slider side wall. When the sensor sheet touches the distance sensor, it starts to record the downward distance information of the linear module.

[0013] As a further improvement, a first sensor is provided on the guide rail side wall below the distance sensor, and a second sensor is provided on the guide rail side wall near the bottom end. When the slider moves on the guide rail, the sensor sheet touches the first sensor, the linear module resets and stops, and the sensor sheet touches the second sensor, the linear module alarms and stops.

[0014] As a further improvement, the distance from the camera module lens to the top of the sensor sheet is 480-500 mm, the height from the first paired sensor module to the conveying roller is 150-170 mm, and the distance from the second paired sensor module to the camera module lens is 680-700 mm.

[0015] As a further improvement, the height of the first sensor from the rack is 1450-1500 mm, and the height of the second sensor from the rack is 1150-1200 mm.

[0016] As a further improvement, a first blocking device is provided on the conveying roller behind the first positioning assembly, and the first blocking device includes a first cylinder fixed to the bottom of the frame, and the first cylinder drives a blocking block between two adjacent conveying rollers. When an abnormality occurs in the first opposing sensing module, the first cylinder drives the blocking block to block the wheel hub.

[0017] As a further improvement, the conveying unit further includes a transfer roller arranged in front of the conveying roller, the transfer roller is driven by a second motor, and the transfer roller conveys qualified products to the first conveying area and conveys unqualified products to the second conveying area.

[0018] A sorting method for a wheel hub online automatic hardness sorting device comprises the following steps:

[0019] S10: Transmitting the wheel hub through a transmission unit;

[0020] S20: Detect the signal of the first pair of beam sensor modules and control the transmission unit to stop running;

[0021] S30: When the linear module is moving downward, the signal of the second pair of sensor modules is detected to obtain the height information of the wheel hub, and the linear module stops running:

[0022] S40: Obtain image information in a bird's-eye view state through a camera module, thereby identifying the wheel hub model and locating the wheel hub:

[0023] S50: Hardness test and classification according to wheel hub model and positioning.

[0024] The beneficial effect of the utility model is that when the wheel hub moves on the conveyor belt, the first pair of shooting sensor modules arranged on both sides of the conveyor roller senses whether the wheel hub has moved into place. When the signal of the first pair of shooting sensor modules is blocked, it means that the wheel hub has moved into place, and then the height information of the wheel hub is sensed by the second pair of shooting sensor modules. After the height information of the wheel hub is determined, the image information in the overhead state is obtained by the camera module, and then the wheel hub model is identified and the wheel hub is positioned. The detection unit performs hardness detection according to the wheel hub model and position. Multiple sensor modules and camera modules in the automation system work together to realize accurate detection and sorting of the wheel hub, realize automated hardness sorting of the wheel hub, and improve detection efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram provided by an embodiment of the utility model.

[0027] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0028] Figure 3 It is a structural side view provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0030] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] Reference Figures 1 to 3 As shown, a wheel hub online automatic hardness sorting device comprises:

[0032] The conveying unit 10 is used to convey the wheel hubs and classify the wheel hubs with qualified hardness or not, and includes a frame 11 and a conveying roller 12 arranged on the frame 11. The conveying unit 10 further includes a transfer roller 13 arranged in front of the conveying roller 12, and the transfer roller 13 is driven by a second motor. The transfer roller 13 conveys qualified products to the first conveying area and conveys unqualified products to the second conveying area. The classification of the wheel hubs by the transfer roller 13 is a prior art and will not be elaborated on here.

[0033] The positioning unit 20 includes a first positioning component 21 and a second positioning component 22. The first positioning component 21 includes a first fixed bracket 211 arranged on both sides of the conveying roller 12. A first matching sensor module 212 is arranged on the first fixed bracket 211. The first matching sensor module 212 includes a first transmitter 2121 and a first receiver 2122 respectively arranged on the first fixed bracket 211.

[0034] The second positioning component 22 includes a mounting bracket 221 located behind the first positioning component 21 and installed above the conveying roller 12, the linear module includes a fixed plate 222 arranged on the mounting bracket 221, the fixed plate 222 is provided with a guide rail 223 that can move in the vertical direction and a slider 224 slidably arranged on the guide rail 223, the slider 224 is provided with a mounting plate 226 driven by a first motor 225, the mounting plate 226 is provided with a camera module 228 for shooting downwards, and the camera module 228 is circumferentially provided with a circle of light sources 2281. In this embodiment, the camera module 228 used is a 2D camera module, and the 2D camera module captures light in the scene through a lens. The function of the lens is similar to that of the lens of the human eye. It focuses light to form an image on the camera's image sensor. Although a 2D camera can only provide two-dimensional images and cannot directly measure the depth information of an object, which limits its ability to locate in three-dimensional space, it has a low cost and can realize the wheel hub positioning function. A second fixed bracket 2261 is provided on the mounting plate 226, and the second radiation sensor module 229 includes a second transmitter 2291 and a second receiver 2292 arranged at both ends of the second fixed bracket 2261.

[0035] The detection unit 30 includes a mechanical arm 31 disposed on one side of the conveying roller 12. The mechanical arm 31 is a six-axis mechanical arm, which is a robot arm with six rotational degrees of freedom and can simulate the complex movements of human arms. Such a mechanical arm is widely used in industrial automation, assembly, packaging, spraying, welding, handling and other fields, and is favored for its flexibility and accuracy. A hardness detection module 32 is also disposed on the mechanical arm 31.

[0036] The working principle of the utility model is as follows: when the wheel hub is being transported on the conveying roller 12, the first pair of shooting sensor modules 212 arranged on both sides of the conveying roller 12 sense whether the wheel hub has moved into position. When the signal of the first pair of shooting sensor modules 212 is blocked, it means that the wheel hub has moved into position, the linear module moves downward, and then the height information of the wheel hub is sensed by the second pair of shooting sensor modules 229 (since the wheel hub is in a flat state, the height information is the width information of the wheel hub at ordinary times). Since the utility model uses a 2D camera module, which can only provide a two-dimensional image, it is necessary to detect the height information by the second pair of shooting sensor modules 229, so as to realize the accurate detection of the wheel hub, and facilitate the hardness detection of the wheel hub. After determining the height information of the wheel hub, the camera module 228 is used to obtain the image information in the overhead state, and then the wheel hub model is identified and the wheel hub is positioned. The detection unit 30 performs hardness detection according to the wheel hub model and position. The automatic hardness sorting of the wheel hub is realized, and the detection efficiency and detection accuracy are improved.

[0037] The principle of the utility model to realize wheel hub height detection through the second pair-shooting sensor module 229 is as follows: a distance sensor 2231 is arranged on the side wall of the guide rail 223 near the top end, and a sensor sheet 2241 corresponding to the distance sensor 2231 is arranged on the side wall of the slider 224. When the sensor sheet 2241 touches the distance sensor 2231, it starts to record the downward distance information of the linear module. When the rays of the second pair-shooting sensor module 229 are blocked, the downward movement stops. At this time, the control module obtains the downward distance information of the linear module, and then compares it with the height of the distance sensor 2231 to obtain the height information of the wheel hub.

[0038] In this embodiment, a first sensor 2232 is provided on the side wall of the guide rail 223 below the distance sensor 2231, and a second sensor 2233 is provided on the side wall of the guide rail 223 near the bottom end. When the slider 224 moves on the guide rail 223, the sensor sheet 2241 touches the first sensor 2232, and the linear module is reset and stopped. After the hardness detection of the current wheel hub is completed, the linear module needs to be reset first. During the resetting of the linear module, the sensor sheet 2241 touches the first sensor 2232, that is, the linear module returns to the initial position. At this time, the upper end surface of the sensor sheet 2241 is flush with the lower end surface of the distance sensor 2231, and the distance sensor can also be realized through the first sensor 2232. The zeroing operation is performed to improve the height detection function of the second pair-shooting sensor module 229. When the sensor sheet 2241 touches the second sensor 2233, the linear module alarms and stops. Since the working principle of the second pair-shooting sensor module 229 is to block the light beam when an object passes between the transmitter and the receiver, thereby triggering the detection action, the second pair-shooting sensor module 229 may fail due to environmental factors, such as dust or other pollutants covering the sensor surface, thereby blocking the light beam, or due to the sensor's own wiring problems, configuration errors, the detection object is not in the detection area, and the optical axis is not aligned. Therefore, the second sensor 2233 can be used to prevent abnormal situations during height detection and problems that cannot be detected.

[0039] As a further improvement, the height of the first pair of shooting sensor module 212 from the conveying roller 12 is 150-170 mm. In the present embodiment, the height of the first pair of shooting sensor module 212 from the conveying roller 12 is 150 mm. Since the height range of the wheel hub is between 165 and 310 mm, the first pair of shooting sensor module 212 is set to a height of 150 mm. The wheel hub can be effectively detected, and the tire groove position of the wheel hub can be detected to prevent the situation where the wheel hub height is small but no detection is performed. It can also effectively prevent the tire wall parts on both sides of the wheel hub from being detected, causing the wheel hub to stop prematurely and be out of the shooting range of the camera module 228.

[0040] The distance between the second pair-shooting sensor module 229 and the camera module 228 lens is 650-680 mm. In this embodiment, the straight-line distance between the second pair-shooting sensor module 229 and the camera module 228 lens is 650 mm. Then, during operation, the second pair-shooting sensor module 229 stops running after detecting the wheel hub height, so that the height of the camera module 228 to the wheel hub is 650 mm each time. The camera module 228 at this height obtains image information in the overhead state, which can not only record the comprehensive image information of the current wheel hubs of different sizes, but also prevent positioning errors caused by incomplete image information, thereby affecting the detection accuracy. The distance between the 2D camera and the object being photographed will also affect the depth of field. The closer the distance, the shallower the depth of field; the farther the distance, the deeper the depth of field. Therefore, by fixing the height of the camera module 228 to the wheel hub each time, a better depth of field effect can be obtained. At this time, only the depth of field effect of environmental factors needs to be considered, and a clear wheel hub picture can be taken by adjusting the light source.

[0041] As a further improvement, the distance from the camera module 228 lens to the top of the sensor sheet 2241 is 480-500 mm, the height of the first sensor 2232 from the camera module 228 lens is 1450-1500 mm, and the height of the second sensor 2233 from the camera module 228 lens is 1150-1200 mm. In this embodiment, the distance from the camera module 228 lens to the top of the sensor sheet 2241 is 500 mm, the height of the first sensor 2232 from the camera module 228 lens is 1500 mm, and the height of the second sensor 2233 from the camera module 228 lens is 1150-1200 mm. 3 The height from the camera module 228 lens is 1150mm. In this embodiment, the straight-line distance from the second pair-beam sensor module 229 ray to the camera module 228 lens is 650mm, and the vertical distance from the top of the sensor sheet 2241 to the second pair-beam sensor module 229 ray is 1150mm, which is exactly the same as the height from the second sensor 2233 to the camera module 228 lens, and the distance between the first sensor 2232 and the second sensor 2233 is 450mm. Therefore, the second pair-beam sensor module 229 in this moving range covers wheels of basically all heights.

[0042] As a further improvement, a first blocking device is provided on the conveying roller 12 behind the first positioning assembly 21, and the first blocking device includes a first cylinder 14 fixed to the bottom of the frame 11, and the first cylinder 14 drives a blocking block 15 provided between two adjacent conveying rollers 12. When an abnormality occurs in the first pair-shooting sensor module, the first cylinder 14 drives the blocking block 15 to intercept the wheel hub. Due to environmental factors, the first pair-shooting sensor module 212 may have dust and other pollutants covering the sensor surface, thereby blocking the light beam, or the first pair-shooting sensor module 212 may fail due to wiring problems of the sensor itself, configuration errors, the detection object is not in the detection area, and the optical axis is not aligned. At this time, the wheel hub can be intercepted by the blocking block 15 to prevent the wheel hub that has not been hardness tested from flowing into the first conveying area or the second conveying area.

[0043] A sorting method for a wheel hub online automatic hardness sorting device comprises the following steps:

[0044] S10: The wheel hub is transmitted through the transmission unit 10;

[0045] S20: Detect the signal of the first beam sensor module 212 and control the transmission unit 10 to stop running;

[0046] S30: During the downward movement of the linear module, the signal of the second pair-beam sensor module 229 is detected to obtain the height information of the wheel hub, and the linear module stops running:

[0047] S40: Obtain image information in a bird's-eye view state through the camera module 228, thereby identifying the wheel hub model and locating the wheel hub:

[0048] S50: Hardness test and classification according to wheel hub model and positioning.

[0049] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wheel hub online automatic hardness sorting device, characterized in that: include: A conveying unit (10), used for conveying the wheel hubs and classifying the wheel hubs, comprises a frame (11) and a conveying roller (12) and a transfer roller (13) arranged on the frame (11); A positioning unit (20), comprising a first positioning component (21) and a second positioning component (22), wherein the first positioning component (21) comprises a first pair of sensing modules (212) arranged on both sides of a conveying roller (12), and the second positioning component (22) comprises a mounting bracket (221) located behind the first positioning component (21) and mounted above the conveying roller (12), wherein the mounting bracket (221) is provided with a longitudinally movable linear module and a camera module (228) arranged on the linear module, and the linear module is fixedly provided with a second pair of sensing modules (229) located on both sides of the conveying roller (12); A detection unit (30) comprises a mechanical arm (31) arranged on one side of the conveying roller (12), and a hardness detection module (32) arranged on the mechanical arm (31); When the wheel hub is being transported on the transport roller (12), the wheel hub is sensed by the first pair-shooting sensor module (212) and the transport is stopped, the linear module moves downward, the height of the wheel hub is sensed by the second pair-shooting sensor module (229), and image information in a bird's-eye view state is acquired by the camera module (228), thereby identifying the wheel hub model and locating the wheel hub, and the detection unit (30) performs hardness detection according to the wheel hub model and position.

2. The wheel hub online automatic hardness sorting equipment according to claim 1, characterized in that: The first positioning component (21) comprises a first fixed bracket (211) arranged at two ends of the conveying roller (12), and the first radiation sensor module (212) comprises a first transmitter (2121) and a first receiver (2122) respectively arranged on the first fixed bracket (211).

3. The wheel hub online automatic hardness sorting equipment according to claim 2, characterized in that: The linear module comprises a fixed plate (222) arranged on a mounting bracket (221), the fixed plate (222) is provided with a guide rail (223) movable in a vertical direction and a slider (224) slidably arranged on the guide rail (223), the slider (224) is provided with a mounting plate (226) driven by a first motor (225), the mounting plate (226) is provided with a camera module (228) for shooting downwards, the camera module (228) is provided with a circle of light sources (2281) in the circumferential direction, the mounting plate (226) is provided with a second fixed bracket (2261), and the second radiation sensor module (229) comprises a second transmitter (2291) and a second receiver (2292) arranged at two ends of the second fixed bracket (2261).

4. The wheel hub online automatic hardness sorting equipment according to claim 3, characterized in that: A distance sensor (2231) is arranged on one end of the side wall of the guide rail (223) near the top, and a sensor sheet (2241) corresponding to the distance sensor (2231) is arranged on the side wall of the slider (224). When the sensor sheet (2241) touches the distance sensor (2231), it starts to record the downward distance information of the linear module.

5. The wheel hub online automatic hardness sorting device according to claim 4, characterized in that: A first sensor (2232) is arranged on the side wall of the guide rail (223) below the distance sensor (2231), and a second sensor (2233) is arranged on the side wall of the guide rail (223) near the bottom end. When the slider (224) moves on the guide rail (223), the sensor sheet (2241) touches the first sensor (2232), and the linear module resets and stops; when the sensor sheet (2241) touches the second sensor (2233), the linear module alarms and stops.

6. The wheel hub online automatic hardness sorting device according to claim 5, characterized in that: The distance from the camera module (228) lens to the top of the sensor sheet (2241) is 480 to 500 mm, the height from the first counter-radio sensor module (212) to the conveying roller (12) is 150 to 170 mm, and the distance from the second counter-radio sensor module (229) to the camera module (228) lens is 680 to 700 mm.

7. The wheel hub online automatic hardness sorting device according to claim 6, characterized in that: The height of the first sensor (2232) from the frame (11) is 1450-1500 mm, and the height of the second sensor (2233) from the frame (11) is 1150-1200 mm.

8. The wheel hub online automatic hardness sorting equipment according to claim 1, characterized in that: A first blocking device is provided on the conveying roller (12) behind the first positioning assembly (21), the first blocking device comprising a first cylinder (14) fixed to the bottom of the frame (11), the first cylinder (14) driving a blocking block (15) provided between two adjacent conveying rollers (12), and when an abnormality occurs in the first opposing sensor module, the first cylinder (14) drives the blocking block (15) to block the wheel hub.

9. The wheel hub online automatic hardness sorting device according to claim 1, characterized in that: The transfer roller (13) is driven by a second motor, and the transfer roller (13) transfers qualified products to a first transfer area and transfers unqualified products to a second transfer area.

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