A surface quality detection system for coin-like products

Abstract

The present invention relates to a surface quality detection system for coin-like products, comprising an annular track conveying component, and a feeding queue conveying component, a front and back visual detection component I, a cam flap turning component, a front and back visual detection component II, and a discharging and sorting conveying component that are sequentially arranged on the annular track conveying component; the cam flap turning component includes a cam plate, a driven bearing, and a turning mechanism. The outer ring of the driven bearing can cooperate with the outer convex curved surface of the cam plate. The driven bearing is installed on the flap of the turning mechanism and can drive the flap of the turning mechanism to rotate. The turning mechanism is arranged on the carrier trolley of the annular track conveying component. The detection system of the present invention adopts a non-destructive transmission and turning method to continuously image the front and back sides of coins, and simultaneously detects parameters such as the side pattern quality, front pattern quality, hierarchical texture pattern, and invisible microscale pattern of coin-like products.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection equipment, and particularly relates to a surface quality detection system for coin-like products. Background Art

[0002] It is understood that existing coin automatic detection devices generally detect the front and back sides separately, with low working efficiency, large outer contour dimensions, and often require a complex turning mechanism, which is prone to failure. To address the above problems, Patent CN101339144B provides a coin double-sided automatic detection device that uses a parallel light source in cooperation with front and back reflectors to image a coin passing through an imaging slit, which is captured by a line array camera and transmitted to an image processing system to achieve simultaneous automatic detection of both sides of the coin. However, in existing coin automatic detection devices, mechanical damage or other defects may occur to the coin during transmission or turning. Precious metal proof coins have clear commemorative themes and delicate patterns and are mainly used for collection. Visible surface damage will reduce their commercial value.

[0003] At the same time, for the surface quality detection of precious metal proof coins, the detection requirements and levels are higher, and there is no device for detecting proof coins yet. Summary of the Invention

[0004] The purpose of the present invention is to propose a surface quality detection system for coin-like products, which has high equipment automation, reliable operation, accurate detection, can complete the non-destructive transmission of coin-like products, and avoid secondary damage to the coins during the detection process, aiming at the defects existing in the prior art.

[0005] To achieve the above purpose, the present invention provides a surface quality detection system for coin-like products, including an annular track conveying component and a feeding queue conveying component, a front and back visual detection component I, a cam flap turning component, a front and back visual detection component II, and a discharging and sorting conveying component arranged in sequence along the annular track conveying component; the cam flap turning component includes a cam plate, a driven bearing, and a turning mechanism. The outer ring of the driven bearing can cooperate with the outer convex curved surface of the cam plate. The driven bearing is installed on the flap of the turning mechanism and can drive the flap of the turning mechanism to rotate. The turning mechanism is arranged on the carrier trolley of the annular track conveying component.

[0006] The present invention provides a special device for the surface quality detection of coins and the statistical analysis of coin-making quality, integrating functions such as the conveying of coin-like finished product queues, the detection of front surface quality, the turning of products one by one, the detection of back surface quality, the sorting of good and bad products, and the output of product queues. Using the system of the present invention, in addition to being able to detect circulating coins, commemorative coins, and gold and silver coins, it can also detect precious metal proof coins with higher requirements and levels.

[0007] The further refined technical solution of the present invention is as follows:

[0008] Preferably, the annular track conveying component includes an annular track installed on the frame. A set of carrier trolleys that can reciprocate along the annular track are provided on the annular track. The carrier trolleys are driven by a driving motor, and a turning mechanism is provided on the carrier trolleys.

[0009] In this way, driven by the driving motor, the carrier trolley can move along the annular track with the turning mechanism.

[0010] Preferably, the output end of the driving motor is connected to a driving wheel. The driving wheel is connected to a driven wheel through an annular conveyor belt. A set of evenly distributed T-shaped connecting blocks are provided on the outer side of the annular conveyor belt. The T-shaped connecting blocks are connected to the carrier trolleys to drive the carrier trolleys to move along the annular track.

[0011] In the above structure, the driving motor is connected to the annular conveyor belt through the driving wheel and the driven wheel to drive the annular conveyor belt to move. The annular conveyor belt drives the carrier trolley to run through the T-shaped connecting blocks.

[0012] Preferably, the turning mechanism is composed of a left turning plate and a right turning plate. The left turning plate is rotatably connected to the right turning plate. One of the left turning plate and the right turning plate is provided with a driven shaft. The driven bearing is sleeved on the driven shaft and can rotate around the driven shaft.

[0013] The present invention uses the mechanical principle of a cam structure to realize coin turning. Through the mutual cooperation of the cam plate, the driven bearing, and the carrier trolley, the turning mechanism moving to the position of the cam plate is turned over, so as to accurately and harmlessly turn over the coin. The above-mentioned carrier trolley transports the turning mechanism to the position of the cam plate and continues to move forward with the turning mechanism, so that the driven bearing connected to the turning plate of the turning mechanism moves along the contour line of the cam plate, and then drives the turning plate to flip, realizing coin turning.

[0014] Preferably, the cam plate is installed on a height adjustment mechanism located outside the annular track, and the installation height of the cam plate is adjusted by the height adjustment mechanism. The height adjustment mechanism includes a column, a slider, a spring, and an adjustment plate. The adjustment plate, the spring, the slider, and the limit nut are sleeved on the column from bottom to top in sequence. The slider is connected to the cam plate, and both the slider and the adjustment plate are slidably connected to the column.

[0015] The height adjustment mechanism adopting the above structure can adjust the installation height of the cam plate. Specifically, by adjusting the position of the adjustment plate, the installation positions of the spring and the slider are adjusted, and then the installation height of the cam plate is adjusted. The installation height of the cam plate is based on the height when the driven bearing is tangent to the highest point of the cam plate when the flap rotates 90°. During the rotation of the flap, the spring is used to form an elastic support, which plays the role of absorbing energy and releasing energy. When the driven bearing passes through the spring position of the cam plate, the spring is compressed. The spring can avoid rigid impact by absorbing energy. After the driven bearing leaves the spring position of the cam plate, the spring can convert the released energy into the kinetic energy of the right flap rotation.

[0016] Preferably, a stop bar is provided on the limit nut to reset the flap.

[0017] Preferably, the feeding queue conveying component includes a first feeding conveyor belt and a second feeding conveyor belt. The first feeding conveyor belt is used as the equipment feeding port to connect with the front-end equipment for feeding. The second feeding conveyor belt is connected with the annular track conveying component. A double-sided automatic detection device is provided between the first feeding conveyor belt and the second feeding conveyor belt. The double-sided automatic detection device is used to detect whether the conveyed coins are qualified products of the transfer die. If they are unqualified products of the transfer die, the coins are directly removed. If they are qualified products of the transfer die, they are continuously conveyed to the second feeding conveyor belt; a coin queue output device is provided on the second feeding conveyor belt.

[0018] Preferably, the double-sided automatic detection device includes a detection plate for carrying coins, two groups of annular light sources symmetrically distributed above and below the detection plate, and two groups of cameras connected to the image processing system. The detection plate is arranged between the conveyor belts of the first feeding conveyor belt and the second feeding conveyor belt. The conveyor belt of the first feeding conveyor belt and the detection plate are arranged obliquely downward along the coin conveying direction to facilitate coin transportation; the coin queue output device includes a coin arranging bar and a combination cylinder arranged at the tail of the coin arranging bar for outputting the coin queue. The coin arranging bar is arranged on the second feeding conveyor belt. The cylinder is connected to a baffle. The cylinder drives the baffle to move up and down, which can open or close the outlet of the coin arranging bar.

[0019] Preferably, the discharging and sorting conveying component includes a first discharging conveyor belt and a second discharging conveyor belt. The first discharging conveyor belt and the second discharging conveyor belt are used as the equipment discharging ports. The first discharging conveyor belt outputs qualified products, and the second discharging conveyor belt outputs unqualified products. A first coin dropping chute is provided at the inlet of the first discharging conveyor belt, and a second coin dropping chute is provided at the inlet of the second discharging conveyor belt. Rotatable stop bars are respectively provided at the inlet ends of the first coin dropping chute and the second coin dropping chute to block the detected products.

[0020] The coin transmission of the present invention adopts a non-destructive transmission design, which can avoid the wear of proof coins during transportation. The coin flipping adopts a reliable and non-destructive flipping method, with a wider adaptability. It is effective not only for circular coins but also for other types of special-shaped coins such as polygons with the same reliability.

[0021] Preferably, both the front and back visual detection components I and II include a detection camera and a corresponding light source. The detection camera and the light source are sequentially installed on the support column from top to bottom, and the detection camera is connected to the image processing system. The support column is installed on the frame through a bracket.

[0022] The present invention is as follows: First, it fills the gap in the automation of the production quality detection of proof coins in the coinage industry;

[0023] Second, in terms of coin transmission, whether it is from input, flipping to output, it adopts an optimized design, that is, it meets the goal of minimizing coin transmission wear;

[0024] Third, it meets the requirements of high-precision visual detection and production efficiency. The dynamic accuracy of its electromechanical platform, the content and accuracy of visual detection are all beyond the reach of previous mechanical inspection equipment.

[0025] In short, the detection system of the present invention adopts a non-destructive transmission and flipping method, continuously images the front and back of the coin, and simultaneously detects parameters such as the side pattern quality, front pattern quality, hierarchical texture pattern, and invisible microtext pattern of coin-like products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 is the top view of the present invention; Figure 2 is the bottom view of the present invention; Figure 3 is the front view of the present invention; Figure 4 is the rear view of the present invention; Figure 5 is the left view of the present invention; Figure 6 is the right view of the present invention.

[0028] Figure 7 is the structural schematic diagram of the frame in the present invention.

[0029] Figure 8 is the structural schematic diagram of the front and back visual detection components in the present invention.

[0030] Figure 9 is the structural schematic diagram of the ring track conveying component in the present invention; Figure 10 is the top view of the ring track conveying component in the present invention; Figure 11 is the front view of the ring track conveying component in the present invention; Figure 12This is the left view in the present invention; Figure 13 It is Figure 11 the A-A sectional view of.

[0031] Figure 14 This is the structural schematic diagram of the feeding queue conveying component in the present invention; Figure 15 It is Figure 14 the top view of. Figure 16 It is Figure 14 the rear view of. Figure 17 It is Figure 14 the right view of.

[0032] Figure 18 This is the structural schematic diagram of the discharging and sorting conveying component in the present invention; Figure 19 It is Figure 18 the top view of. Figure 20 It is Figure 18 the front view of. Figure 21 It is Figure 18 the right view of.

[0033] Figure 22 This is the structural schematic diagram of the cam flap turning component in the present invention; Figure 23 It is Figure 22 the front view of. Figure 24 It is Figure 22 the rear view of. Figure 25 It is Figure 22 the side view of. Figure 26 It is Figure 22 the top view of.

[0034] Figure 27 This is the schematic diagram of the cam plate contour line in the present invention.

[0035] Figure 28 This is the X-θ curve graph of the flap rotation angle in the present invention.

[0036] In the figure: 1. Frame, 101. Rectangular frame, 102. Installation panel, 103. Support leg, 104. Caster, 2. Ring track conveying component, 201. Ring track, 202. Carrier cart, 203. Driving motor, 204. Driving wheel, 205. Ring conveyor belt, 206. Driven wheel, 207. T-shaped connecting block, 208. Substrate, 3. Feeding queue conveying component, 301. First feeding conveyor belt, 302. Second feeding conveyor belt, 303. Detection board, 304. Ring light source, 305. Automatic detection motor, 306. Coin arranging bar, 307. Combined cylinder, 4. Front vision detection part, 5. Cam flap turning part, 501. Cam plate, 502. Driven bearing, 503. Driven shaft, 504. Coin, 505. Right flap, 506. Left flap, 507. Stop bar, 508. Column, 509. Limit nut, 510. Slide block, 511. Spring, 512. Adjusting plate, 513. Base, 514. Bottom plate, 515. Support column, 6. Reverse vision detection part, 7. Discharging and sorting conveying component, 701. First discharging conveyor belt, 702. Second discharging conveyor belt, 703. First coin dropping chute, 704. Second coin dropping chute, 705. First rotary cylinder, 706. Second rotary cylinder, 707. First stop strip, 708. Second stop strip, 8. Side detection camera, 9. Side detection light source, 10. Planar detection camera, 11. Planar detection light source, 12. Hierarchical texture detection camera, 13. Hierarchical texture detection light source, 14. Invisible microtext detection camera, 15. Invisible microtext detection light source, 16. Surface color difference detection camera, 17. Surface color difference detection light source. Detailed implementation mode

[0037] Embodiment 1

[0038] As Figures 1 to 6 described, a surface quality detection system for coin-like products includes a frame 1 and a ring track conveying component 2, a feeding queue conveying component 3, a front vision detection component 4, a cam flap turning component 5, a reverse vision detection part 6, and a discharging and sorting conveying component 7 arranged on the frame 1. The feeding queue conveying component 3, the front vision detection part 4, the cam flap turning component 5, the reverse vision detection part 6, and the discharging and sorting conveying component 7 are arranged in sequence along the conveying direction of the ring track conveying component 2.

[0039] As Figure 7 shown, the frame 1 includes a rectangular frame 101, an installation panel 102, support legs 103, and casters 104. The installation panel 102 is made of aluminum plate and is used to install the ring track conveying component 2, the feeding queue conveying component 3, the front vision detection component 4, the cam flap turning component 5, the reverse vision detection component 6, and the discharging and sorting conveying component 7. The casters 104 are installed at the bottom of the giant frame 101 to facilitate the movement of the machine.

[0040] As Figure 8 shown, the front vision detection component 4 and the back vision detection component 6 have the same structure, both including a side detection component, a planar detection component, a hierarchical texture detection component, a hidden micro-reduction detection component, and a surface color difference detection component. The side detection component consists of a side detection camera 8 and a corresponding side detection light source 9. The planar detection component consists of a planar detection camera 10 and a corresponding planar detection light source 11. The hierarchical texture detection component consists of a hierarchical texture detection camera 12 and a corresponding hierarchical texture detection light source 13. The hidden micro-reduction detection component consists of a hidden micro-reduction detection camera 14 and a corresponding hidden micro-reduction detection light source 15. The surface color difference detection component consists of a surface color difference detection camera 16 and a corresponding surface color difference detection light source 17. The detection cameras and light sources of each component are sequentially installed on a support column from top to bottom. The support column is installed on the frame 1 through a bracket. The above detection cameras are area array cameras used to collect image information and can be connected to an image processing system. When the front vision detection component 4 and the back vision detection component 6 are working, through the cooperation of the cameras and the corresponding light sources, the sides, planes, hierarchical textures, hidden micro-reductions, and surface color differences of the passing coins on the front and back are sequentially detected, and the collected data information is transmitted to the image processing system of the host computer for image processing. The host computer judges whether the processed image meets the preset requirements. If it meets the preset requirements, it means that the product to be detected is qualified; otherwise, it means that it is unqualified. Then, the action of the discharge sorting and conveying component 7 is controlled according to the detection result.

[0041] As Figures 9 to 13As shown in the figure, the annular track conveying component 2 includes a substrate 208 mounted on the frame 1 and an annular track 201 mounted on the substrate 208. A set of carrier trolleys 202 that can reciprocate along the annular track 201 are provided on the annular track 201. The carrier trolleys 202 are driven by a drive motor 203 mounted on the substrate 208. The output end of the drive motor 203 is connected to a driving wheel 204. The driving wheel 204 is connected to three driven wheels 206 mounted on the substrate 208 through an annular conveyor belt 205 arranged inside the annular track 201. A set of evenly distributed T-shaped connecting blocks 207 are provided on the outer side of the annular conveyor belt 205. The T-shaped connecting blocks 207 are connected to the carrier trolleys 202 to drive the carrier trolleys 202 to move along the annular track 201. When the drive motor 203 operates, it drives the driving wheel 204 to rotate. The driving wheel 204 drives the driven wheels 206 to rotate through the annular conveyor belt 205. When the annular conveyor belt 205 rotates, it drives the carrier trolleys 202 to move along the annular track 201 through the T-shaped connecting blocks 207. An inlet station, a front vision inspection station, a turning station, a back vision inspection station, and an outlet station are sequentially provided on the annular track 201. The inlet queue conveying component 3 is mounted at the inlet station, the front vision inspection component 4 is mounted at the front vision inspection station, the cam flap turning component 5 is mounted at the turning station, the back vision inspection component 6 is mounted at the back vision inspection station, and the outlet sorting and conveying component 7 is mounted at the outlet station.

[0042] As Figures 14 to 17As shown in the figure, the feeding queue conveying component 3 includes a first feeding conveyor belt 301 and a second feeding conveyor belt 302. The first feeding conveyor belt 301 is connected to the front-end equipment as the equipment feeding port for feeding, and the second feeding conveyor belt 302 is connected to the annular track conveying component 2. Among them, the conveying belts of the first feeding conveyor belt 301 and the second feeding conveyor belt 302 are arranged in an L shape. A double-sided detection station and a coin queue output station are provided between the first feeding conveyor belt 301 and the second feeding conveyor belt 302, and a double-sided automatic detection device is provided at the double-sided detection station. The double-sided automatic detection device is used to detect whether the conveyed coins are qualified products of die transfer. If they are unqualified die transfer products, the coins are directly removed through the coin removal mechanism. If they are qualified die transfer products, they are continuously conveyed to the second feeding conveyor belt 302. A coin queue output station is provided on the conveying belt of the second feeding conveyor belt 302, and a coin queue output device is provided at the coin queue output station. The double-sided automatic detection device includes a detection plate 303 for carrying coins, two groups of annular light sources 304 symmetrically distributed up and down relative to the detection plate 303, and two groups of automatic detection cameras 305 (using area array cameras) connected to the image processing system. The detection plate 303 is a transparent plate that can be photographed or a window for photographing is provided on the detection plate 303. The detection plate 303 is arranged between the conveying belt of the first feeding conveyor belt 301 and the conveying belt of the second feeding conveyor belt 302. The conveying belt of the first feeding conveyor belt 301 and the detection plate 303 are arranged obliquely downward along the coin conveying direction to facilitate coin transportation. The coin queue output device includes two coin arranging bars 306 and a combined cylinder 307 provided at the tail of the coin arranging bars 306 for outputting the coin queue. The two coin arranging bars 306 are arranged on the conveying belt of the second feeding conveyor belt 302 and a coin channel is formed between them. The combined cylinder 307 is connected to a baffle with an L-shaped cross-section. The combined cylinder 307 drives the baffle to move up and down, which can open or close the outlet of the coin arranging bars 306. When the feeding queue conveying component 3 works, the coins enter the first feeding conveyor belt 301 one by one from the front-end equipment. The first feeding conveyor belt 301 conveys the coins to the detection plate 303 for double-sided detection of the coins. The qualified products enter the second feeding conveyor belt, that is, 302, and the coins are arranged by the coin arranging bars 306 so that the coins are arranged in a queue. The combined cylinder 307 acts to control the opening and closing of the channel outlet of the coin arranging bars 306, so that the coins are output one by one in a queue to the carrier cart 202 at the equipment feeding port.

[0043] As Figures 18 to 21As shown, the discharging and sorting conveyor component 7 includes a first discharging conveyor belt 701 and a second discharging conveyor belt 702. Both the first discharging conveyor belt 701 and the second discharging conveyor belt 702 serve as the equipment discharging outlets. Among them, the first discharging conveyor belt 701 outputs qualified products, and the second discharging conveyor belt 702 outputs unqualified products. The conveyor belt 701 of the first discharging conveyor belt and the conveyor belt of the second discharging conveyor belt 702 are arranged in an L shape. At the inlet of the first discharging conveyor belt 701, there is a first coin dropping chute 703. At the inlet of the second discharging conveyor belt 702, there are two second coin dropping chutes 704. On the conveyor belt of the second discharging conveyor belt 702, there is a coin sorting bar, which divides the conveyor belt into two coin conveying channels. The first coin dropping chute 703 and the second coin dropping chutes 704 are arranged side by side at the discharging station of the annular track 201. At the inlet end of the first coin dropping chute 703, there is a first rotary cylinder 705 respectively. At the inlet end of the second coin dropping chute 704, there is a second rotary cylinder 706. At the flange end of the first rotary cylinder 705, a rotatable first stop bar 707 is installed. At the flange end of the second rotary cylinder 706, a rotatable second stop bar 708 is installed. Both the first stop bar 707 and the second stop bar 708 are used to block the inspected products. The action of the rotary cylinder can drive the stop bar to rotate, realizing the opening and closing of the inlet of the coin dropping chute. When the qualified product is conveyed to the position of the discharging and sorting conveyor component 7, the second stop bar 708 blocks the inlet of the second coin dropping chute 704, and the first rotary cylinder 705 acts to drive the first stop bar 707 to rotate, so that the inlet of the first coin dropping chute 703 is opened. The qualified product enters the first discharging conveyor belt 701 through the first coin dropping chute 703 for discharging. Then, the first rotary cylinder 705 acts again to make the first stop bar 707 return to its original position to block the inlet of the first coin dropping chute 703. When the unqualified product is conveyed to the position of the discharging and sorting conveyor component 7, the second rotary cylinder 706 acts to drive the second stop bar 708 to rotate, so that the inlet of the second coin dropping chute 704 is opened. The unqualified product enters the second discharging conveyor belt 702 through the second coin dropping chute 704, and the unqualified coin is conveyed to the waste coin box. The second rotary cylinder 706 acts again to make the second stop bar 708 return to its original position to block the inlet of the second coin dropping chute 704.

[0044] As Figures 22 to 26As shown in the figure, the cam flap turning part 5 includes a cam plate 501, a driven bearing 502, a turning mechanism and a height adjusting mechanism. The upper end of the cam plate 501 has a convex curved surface. The driven bearing 502 is connected to the right flap 505 of the turning mechanism, and the outer ring of the driven bearing 502 can cooperate with the convex curved surface of the cam plate 501. The turning mechanism is arranged on the carrier trolley 202 that can move along the annular track 201 and can move with the carrier trolley 202. After the cam plate 501 and the height adjusting mechanism are installed together, they are arranged at the coin turning station of the annular track module. Among them, the turning mechanism is composed of a left flap 506 and a right flap 505. The left flap 506 and the right flap 505 are rotatably connected through a rotating shaft. A driven shaft 503 is arranged on the outer side of the right flap 505. The driven bearing 502 is sleeved on the driven shaft 503 and can rotate around the driven shaft 503. A groove is provided on one side of the left flap 506, and a protrusion part that cooperates with the groove is provided on one side of the right flap 505. A laterally penetrating through hole is made in the protrusion part of the right flap 505. The rotating shaft is in interference fit with the through hole. Axial holes that are in clearance fit with the end of the rotating shaft are made on both side walls of the groove of the left flap 506. After the rotating shaft passes through the through hole of the protrusion part, it is installed in the axial holes of the groove and can rotate in the axial holes. This enables the protrusion part of the right flap 505 to be pivotally connected to both sides of the groove of the left flap 506 through the rotating shaft. A limiting step for preventing the coin 504 from slipping is also provided in the groove of the left flap 506. A layer of rubber pad is provided on the surfaces of both the left flap 506 and the right flap 505, which can increase the contact friction of the coin 504 and prevent the coin 504 from slipping out of the left flap 506 after being turned over. When the turning device works, the carrier trolley 202 moves along the annular track 201, transports the turning mechanism to the coin turning station of the annular track module. Driven by the carrier trolley 202, the driven bearing 502 connected to the right flap 505 moves along the convex curved surface of the cam plate 501, so that when the driven bearing 502 moves on the convex curved surface of the cam plate 501, the right flap 505 rotates around the center of the rotating shaft under the action of the outer contour line of the cam plate 501, driving the coin 504 placed on the right flap 505 to rotate accordingly, realizing the flipping of the front and back sides of the coin 504 to the left flap 506 and completing the coin 504 turning action.

[0045] The cam plate 501 is installed on the height adjustment mechanism, and the installation height of the cam plate 501 is adjusted by the height adjustment mechanism. The height adjustment mechanism is divided into left and right parts, and each part includes a column 508 and a limit fixing block 509, a slider 510, a spring 511, an adjustment plate 512 and a base 513 that are sleeved on the column 508 from top to bottom in sequence. The slider 510 is fixedly connected to the cam plate 501 and is slidably connected to the column 508. The slider 510 can move up and down along the column 508. By moving the cam plate 501 up and down along the column 508 with the slider 510, the installation position of the cam plate 501 can be adjusted. A spring 511 is arranged below the slider 510. The spring 511 is used to form an elastic support and plays a role in absorbing and releasing energy. It can not only avoid rigid impact but also provide kinetic energy for the rotation of the right flap 505. A stop lever 507 is arranged on the limit fixing block 509 of the left height adjustment mechanism to block the flipped right flap 505 and make it reset when it reaches this position. Usually, there is a certain distance between the limit fixing block 509 and the slider 510 of the left height adjustment mechanism, and this limit fixing block 509 is used to install the baffle 507; there is no gap between the limit fixing block 509 and the slider 510 of the right height adjustment mechanism, and this limit fixing block 509 directly abuts against the upper surface of the slider 510 to limit the position of the slider 510. The adjustment plate 512 is a rectangular plate, and through holes that can cooperate with the lower part of the column 508 are respectively made on its left and right sides, and a through hole that can cooperate with the adjustment column 515 is made in the middle. The column 508 and the adjustment column 515 respectively pass through the through holes on the adjustment plate 512 and are installed in the base 513. Among them, the lower ends of the column 508 and the adjustment column 515 are fixedly connected to the base 513, and the adjustment plate 512 and the column 508 form a vertically slidable connection by rotating the adjustment column 515. The upper part of the adjustment column 515 has an external thread, so that the adjustment plate 512 is threadedly connected to the adjustment column 515, which is convenient for the adjustment plate 512 to be fixed after being rotated to an appropriate position of the adjustment column 515. Rotating the adjustment column 515 can control the installation position of the adjustment plate 512, and further realize the fine adjustment of the slider 510 downward, so that the running rotation angle of the right flap 505 is greater than 95°, ensuring that the coin 504 can successfully complete the flipping action. The adjustment plate 512 is slidably connected to the column 508. Rotating the adjustment column 515 can move the adjustment plate 512 up and down so that it moves up and down along the column 508 and the adjustment column 515 to reach a suitable position, and then the installation height of the slider 510 is adjusted through the adjustment plate 512, and finally the purpose of adjusting the installation height of the cam plate 501 is achieved. The base 513 is installed on the bottom plate 514, and the bottom plate 514 is installed on the frame 1 of the surface quality detection system for coin-like products.

[0046] The length of the coin flipping station (i.e., the sum of the widths of the left and right flap plates) is denoted as L, L = 300, the rotation radius of the flap plate is denoted as R, R = 40, the diameter of the driven bearing 2 is denoted as D, D = 8, and the horizontal movement range of the flap plate is denoted as x, where x takes values in [-150, 150]. The above units are all mm. The vertical distance between the highest point and the lowest point of the cam plate 501 is not less than the rotation radius of the right flap plate 505, that is, the height H of the cam plate 501 (i.e., the vertical distance between the highest point and the lowest point of the cam plate) needs to satisfy the following constraint conditions:

[0047]

[0048] For a general compact design, the value of H is taken as 40.

[0049] The contour line of the convex outer surface of the cam plate is composed of symmetric lift contour lines and return contour lines on the left and right, which enables the right flap plate to be uniformly linearly stressed. As Figure 27 shown, the lift contour line needs to satisfy the following constraint conditions:

[0050]

[0051] The return contour line needs to satisfy the following constraint conditions:

[0052]

[0053] The contour line of the cam plate satisfies the formula f(x). On the one hand, under the working conditions of low speed and light load, it meets the requirements of the structural design, that is, it is required to complete the flipping of the coin 504 within a 300 mm stroke range. On the other hand, it can ensure that the right flap plate 505 realizes uniform motion to prevent the influence of speed fluctuations on the position of the coin. The height design formula of the cam plate 501 is to ensure that the flipping angle range of the right flap plate 505 can cover 0 - 90°. At the same time, the vertical distance between the highest point and the lowest point of the cam plate 501 is not less than the rotation radius of the right flap plate 505, and the right flap plate 505 realizes a uniform motion law, so that the coin 504 set on the right flap plate 505 can be successfully flipped, and the position of the coin after flipping meets the preset requirements and will not slide out of the left flap plate 506. The installation height of the cam plate 501 can be adjusted up and down through the lifting adjustment mechanism. The installation height of the cam plate 501 can be finely adjusted downward within the range of 0.5 - 1 mm, resulting in the running rotation angle of the right flap plate 505 being greater than 95°, ensuring that the coin 504 can successfully complete the flipping action.

[0054] In addition, the installation height of the cam plate 501 needs to meet the following conditions: When the right flap 505 rotates 90°, the height reference is that the driven bearing 502 is tangent to the highest point of the cam plate. On this basis, the installation height of the cam plate 501 can be finely adjusted by the adjusting column 515. Rotate the adjusting column 515 to move the adjusting plate 512 up and down so that it moves up and down along the column 508 and the adjusting column 515 to reach the appropriate position, and then the installation height of the slider 510 can be adjusted through the adjusting plate 512, thereby adjusting the installation height of the cam plate 501. To reduce the vibration caused by sudden load changes, it is finely adjusted downward by 0.5 - 1 mm based on the reference height, so that the operating rotation angle of the right flap 505 is greater than 95°, which can ensure that the coin 504 is successfully turned over and will not slide out of the left flap 506.

[0055] As Figure 28 shown, in order to meet the requirement that within the design stroke of 300 mm, the flap rotation angle can cover the range of 0 - 90°, that is, to ensure the working stroke of the flap. The rotation angle of the right flap 505 conforms to the x-θ curve, and the curve of the right flap 505 during the lift needs to meet the following conditions:

[0056]

[0057] The curve of the right flap 505 during the return stroke needs to meet the following conditions:

[0058]

[0059] In addition, the return stroke contour line and the lift contour line each consist of a straight line segment. The slope of the straight line segment of the right end lift contour line is The slope of the straight line segment of the left end return stroke contour line is

[0060] When the flipping device of this embodiment is in the initial position, the cam plate 501 and the height adjustment mechanism are fixed, the left flip plate 506 and the right flip plate 505 are installed on the carrying trolley 202 on the circular track 201, and can move with the carrying trolley 202. At the same time, the left flip plate 506 is relatively fixed, and the right flip plate 505 can rotate with the center of the rotating shaft. At this time, the coin 504 is placed on the right flip plate 505. The carrying trolley 202 moves, and the left flap 506 and the right flap 505 move with the carrying trolley 202. When the driven bearing 502 contacts the convex surface of the upper end of the cam plate 501, the right flap 505 is lifted according to the law of the contour curve of the cam plate 501, so that it rotates around the center of the rotating shaft. When the cam plate 501 is at the highest point, the right flap 505 rotates to the maximum angle (greater than 90°), and the coin 504 follows the right flap 505 to rotate an angle greater than 90°. Then, under the action of gravity, the coin 504 continues to flip in the direction of the angle greater than 90°, and finally achieves a 180° flip under the action of inertia and gravity. The coin 504 flips 180° from the right flap 505 to the left flap 506. When the driven bearing 502 passes the highest point of the cam plate 501, the right flap 505 continues to move along the contour of the cam plate 1, and returns to its original position along the return contour of the cam plate 501 under the action of the stopper 507. In this way, the flip mechanism repeats the above process after orbiting the annular track 201 for a cycle, and performs a repetitive motion cycle.

[0061] During the flipping process of coin 504, to ensure that coin 504 is successfully flipped, the device of this embodiment must meet the following conditions: (1) the linear speed of the flip plate does not exceed 17m / min; (2) the rotation angle of the right flip plate 505 is not less than 95° (this rotation angle can be ensured by adjusting the installation height of the cam plate 501); (3) after the coin 504 rotates 95° with the limiting step as the rotation center, it continues to rotate under the action of gravity and inertia until it falls on the left flip plate and stops, at which point the coin completes a 180° flip.

[0062] The present invention designs 11 visual inspection stations, and the camera, lens, light source, etc. used in each station are selected differently according to different inspection objects and requirements.

[0063] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A surface quality inspection system for coin-like products, characterized in that: It includes an annular track conveying component, and a feeding queue conveying component, a front and back visual inspection component I, a cam flap turning component, a front and back visual inspection component II, and a discharging and sorting conveying component arranged in sequence along the annular track conveying component; the cam flap turning component includes a cam plate, a driven bearing, a turning mechanism, and a height adjustment mechanism. The upper end of the cam plate has a convex curved surface. The driven bearing is connected to the right flap of the turning mechanism. The outer ring of the driven bearing can cooperate with the convex curved surface of the cam plate. The turning mechanism is arranged on a carrier trolley that can move along the annular track and can move with the carrier trolley. After the cam plate and the height adjustment mechanism are installed together, they are arranged at the coin turning station of the annular track module. The turning mechanism is composed of a left flap and a right flap. The left flap is rotatably connected to the right flap, and one of the left flap and the right flap is provided with a driven shaft. The driven bearing is sleeved on the driven shaft and can rotate around the driven shaft. A groove is provided on one side of the left flap, and a protrusion part that cooperates with the groove is provided on one side of the right flap. A laterally penetrating perforation is made on the protrusion part of the right flap, and the rotating shaft is in interference fit with the perforation. Axial holes that are in clearance fit with the end part of the rotating shaft are made on both side walls of the groove of the left flap. The rotating shaft passes through the perforation of the protrusion part and is installed in the axial holes of the groove and can rotate in the axial holes, so that the protrusion part of the right flap is pivotally connected to both sides of the groove of the left flap through the rotating shaft. A limiting step for preventing the coin from slipping is also provided in the groove of the left flap.

2. The surface quality inspection system for coin-like products according to claim 1, characterized in that: The annular track conveying component includes an annular track installed on a frame. A group of carrier trolleys that can move reciprocally along the annular track are provided on the annular track. The carrier trolleys are driven by a driving motor to run. A turning mechanism is provided on the carrier trolleys.

3. The surface quality inspection system for coin-like products according to claim 2, characterized in that: The output end of the driving motor is connected to a driving wheel. The driving wheel is connected to a driven wheel through an annular conveyor belt. A group of uniformly distributed T-shaped connection blocks are provided on the outer side of the annular conveyor belt. The T-shaped connection blocks are connected to the carrier trolleys.

4. The surface quality inspection system for coin-like products according to claim 1, characterized in that: The cam plate is installed on a height adjustment mechanism located outside the annular track. The height adjustment mechanism includes a column, a slider, a spring, and an adjustment plate. The adjustment plate, the spring, the slider, and the limit nut are sleeved on the column from bottom to top in sequence. The slider is connected to the cam plate.

5. The surface quality inspection system for coin-like products according to claim 4, characterized in that: A stop rod is provided on the limit nut.

6. The surface quality inspection system for coin-like products according to claim 1, characterized in that: The feeding queue conveying component includes a first feeding conveyor belt and a second feeding conveyor belt, and a double-sided automatic detection device is provided between the first feeding conveyor belt and the second feeding conveyor belt; a coin queue output device is provided on the second feeding conveyor belt.

7. The surface quality detection system for a coin-like product according to claim 6, characterized in that: The double-sided automatic detection device includes a detection plate for carrying coins, two groups of annular light sources symmetrically distributed up and down relative to the detection plate, and two groups of cameras; the coin queue output device includes a coin arranging bar and a cylinder arranged at the tail of the coin arranging bar, the coin arranging bar is arranged on the second feeding conveyor belt, and the cylinder is connected to a baffle.

8. The surface quality detection system for a coin-like product according to claim 1, characterized in that: The discharging and sorting conveying component includes a first discharging conveyor belt and a second discharging conveyor belt, a first coin dropping chute is provided at the inlet of the first discharging conveyor belt, a second coin dropping chute is provided at the inlet of the second discharging conveyor belt, and rotatable stop bars are respectively provided at the inlet ends of the first coin dropping chute and the second coin dropping chute.

9. The surface quality detection system for a coin-like product according to claim 1, characterized in that: Both the front and back visual detection component one and the front and back visual detection component two include a detection camera and a corresponding light source, the detection camera and the light source are sequentially installed on a support column from top to bottom, and the support column is installed on a frame through a bracket.

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