Zinc alloy die casting visual inspection equipment

Abstract

The invention discloses zinc alloy die casting visual inspection equipment which is characterized in that the equipment comprises a workbench and a feeding mechanism, the feeding mechanism is arranged on the workbench, and parts are discharged through the feeding mechanism; the first detection mechanism is connected with the feeding mechanism, and image collection is conducted on the upper surface of the part through the first detection mechanism; the second detection mechanism is used for carrying out image acquisition on the side surface and the bottom surface of the part; the material distribution mechanism is used for carrying out classified storage according to the part detection result; and the carrying mechanism grabs the parts and moves among the first detection mechanism, the second detection mechanism and the material distribution mechanism. Through cooperation of the camera and the lens, reflection of the lens is ingeniously utilized, side images of parts are collected through one camera, the number of used cameras is greatly reduced, the equipment cost is further reduced, and meanwhile the equipment size is greatly reduced due to the fact that the number of the cameras is reduced.

Description

Technical Field

[0001] The invention relates to the field of die casting, and in particular to a visual inspection device for zinc alloy die castings. Background Art

[0002] The existing process is to use multi-station cameras to identify various appearance defects, such as bruises, dirt, bubbles, missing materials, deformation, burrs, and extra materials. However, the structure of the product being inspected is relatively small, and the defect characteristics of the appearance surface are irregular. There are always blind spots when using multi-station and supporting camera inspections, and appearance defects cannot be effectively identified. As a result, the unidentifiable defective samples are output to the client.

[0003] Existing visual inspection equipment sets up multiple cameras for image acquisition according to the inspection position of the parts, which undoubtedly greatly increases the cost of the equipment, and the parts need to be switched between various workstations, which greatly affects the inspection efficiency. Summary of the invention

[0004] In view of the defects of the above prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art and disclose a visual inspection device for zinc alloy die castings, including a workbench, A feeding mechanism, the feeding mechanism is arranged on the workbench, and the parts are discharged by the feeding mechanism; A first detection mechanism, wherein the first detection machine is connected to the feeding mechanism and uses the first detection mechanism to collect images of the upper surface of the part; A second detection mechanism, wherein the second detection mechanism collects images of the side and bottom surfaces of the part; A material sorting mechanism, which performs classified storage according to parts inspection results; A transport mechanism, wherein the transport mechanism grabs the parts and moves between the first detection mechanism, the second detection mechanism and the material distribution mechanism.

[0005] Furthermore, the feeding mechanism includes a vibration plate, a guide rail, a material shortage detection component and a material replenishing component. The discharge port of the vibration plate is connected to the first detection mechanism through the guide rail, and the parts in the vibration plate are monitored by the material shortage detection component; the material replenishing component replenishes the vibration plate.

[0006] Furthermore, the feeding assembly includes a first bracket, a material bin, a material guide trough and a vibrator, the vibrator is arranged on the first bracket, the material guide trough is arranged on the vibrator, and the discharge end of the material guide trough extends above the vibration plate, and the material bin is located above the material guide trough.

[0007] Furthermore, the material shortage detection component includes a second bracket, a first sensor and a detection rod, the second bracket is arranged on the workbench, the detection rod is rotatably arranged on the second bracket, and an identification part is arranged on the upper end of the detection rod. When the first sensor detects the identification part, there is a shortage of material in the vibration plate.

[0008] Furthermore, the first detection mechanism includes a third bracket, a jig, a fourth bracket and a first camera, the jig is arranged on the workbench through the third bracket, a workpiece groove matching the part is arranged on the jig, and one end of the workpiece groove is connected to the discharge port of the feeding mechanism; the first camera is arranged on the workbench through the fourth bracket, and the camera is located above the jig.

[0009] Furthermore, the second detection mechanism includes a fifth bracket, a second camera, a fixed fixture, a light source and a lens, the fifth bracket is arranged on the workbench, the fixed fixture and the second camera are arranged on the fifth bracket, and the second camera is located below the fixed fixture, the lens ring is arranged in the fixed fixture, the light source is arranged in the fixed fixture, and a collection port is arranged at the bottom of the fixed fixture, the lens is used to reflect the side of the part to the collection port, and the image is collected by the second camera.

[0010] Furthermore, eight lenses are provided, and the lenses are arranged in the shape of a regular octagon in the fixing fixture.

[0011] Furthermore, the light source is a ring structure.

[0012] Furthermore, a reflective portion is protruding upward from the bottom of the fixing fixture, and the reflective portion is in a truncated cone structure.

[0013] Furthermore, the transport mechanism includes a sixth bracket, a first actuator, a second actuator, a third actuator and a suction cup, the first actuator is arranged on the workbench through the sixth bracket, the second actuator is arranged on the first actuator, the third actuator is arranged on the second actuator, and the suction cup is arranged on the third actuator, the first actuator is used to drive the suction cup to move laterally, and the second actuator and the third actuator control the vertical movement of the suction cup.

[0014] Beneficial effects achieved by the present invention: The present invention cooperates with a camera and a lens and cleverly utilizes the reflection of the lens to collect the side image of the part through a camera, which greatly reduces the number of cameras used and thus reduces the equipment cost. At the same time, due to the reduction in the number of cameras, the size of the equipment is also greatly reduced, and the overall space occupancy rate is reduced by 40%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a visual inspection device for zinc alloy die castings of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the feeding mechanism; Figure 3 It is a three-dimensional structural schematic diagram of the material shortage detection component; Figure 4 is a schematic diagram of the three-dimensional structure of the first detection mechanism; Figure 5 for Figure 4 A magnified view of middle; Figure 6 is a schematic diagram of the three-dimensional structure of the second detection mechanism; Figure 7 is a schematic diagram of the cooperation between the second camera and the fifth bracket; Figure 8 is a cross-sectional view of the second detection mechanism; Fig. 9 This is a schematic diagram of the coordination between the fixing fixture, lens and light source; Fig.10 It is a three-dimensional structural schematic diagram of the transport mechanism; Fig.11 It is a structural schematic diagram of the material distribution mechanism; The reference numerals are as follows: 1. Workbench, 2. Feeding mechanism, 3. First detection mechanism, 4. Second detection mechanism, 5. Material distribution mechanism, 6. Transport mechanism, 21. Vibrating plate, 22. Guide rail, 23. Material shortage detection component, 24. Replenishment component, 231. Second bracket, 232. First sensor, 233. Detection rod, 234. Identification unit, 241. First bracket, 242. Bin, 243. Guide trough, 244. Vibrator, 31. Third bracket, 32. Fixture, 33. Fourth bracket, 34. First camera, 35. First replenishment Light, 36, workpiece slot, 37, second sensor, 41, fifth bracket, 42, second camera, 43, fixing fixture, 44, light source, 45, lens, 46, connecting plate, 47, second fill light, 411, vertical plate, 412, horizontal plate, 413, fixing hole, 431, collection port, 432, reflecting part, 51, defective product guide tube, 52, good product guide tube, 53, defective product storage box, 61, sixth bracket, 62, first actuator, 63, second actuator, 64, third actuator, 65, suction cup. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] A visual inspection device for zinc alloy die castings, such as Figure 1 As shown, it includes a workbench 1, The feeding mechanism 2 is arranged on the workbench 1, and the feeding mechanism 2 is used to arrange the parts; that is, the feeding mechanism 2 arranges the parts in the same direction.

[0018] A first detection mechanism 3, the first detection mechanism 3 is connected to the feeding mechanism 2, and the first detection mechanism 3 is used to collect images of the upper surface of the part; The second detection mechanism 4 collects images of the side and bottom surfaces of the part; The material separation mechanism 5 is used to classify and store parts according to the test results; The transport mechanism 6 grabs the parts and moves them between the first detection mechanism 3 , the second detection mechanism 4 and the material dividing mechanism 5 .

[0019] In one embodiment, if Figure 1-Figure 2 As shown, the feeding mechanism 2 includes a vibration plate 21, a guide rail 22, a material shortage detection component 23 and a material replenishment component 24. The discharge port of the vibration plate 21 is connected to the first detection mechanism 3 through the guide rail 22. The parts in the vibration plate 21 are monitored by the material shortage detection component 23; and the material replenishment component 24 replenishes the vibration plate 21. When the material shortage detection component 23 recognizes that there are fewer parts in the vibration plate, the material replenishment component 24 is started to replenish the parts into the vibration plate 21.

[0020] In the above embodiment, if Figure 1-Figure 2 As shown, the feeding assembly 24 includes a first bracket 241, a material bin 242, a material guide trough 243 and a vibrator 244. The vibrator 244 is arranged on the first bracket 241, the material guide trough 243 is arranged on the vibrator 244, and the discharge end of the material guide trough 243 extends above the vibration plate 21, and the material bin 242 is located above the material guide trough 243. Specifically, the material bin 242 is a funnel structure, and a discharge port is arranged at the bottom; there is a certain gap between the material bin 242 and the material guide trough 243. When feeding, the vibrator 244 makes the material guide trough 243 shake, so as to move the parts to the discharge end of the material guide trough 243 and fall into the vibration plate 21. The parts in the material bin 242 fall from the discharge port to the material guide trough 243. If the vibrator 244 does not work, the parts will be accumulated between the material bin 242 and the material guide trough 243.

[0021] In one embodiment, if Figure 1-Figure 2As shown, the material shortage detection assembly 23 includes a second bracket 231, a first sensor 232 and a detection rod 233. The second bracket 231 is arranged on the workbench 1, and the detection rod 233 is rotatably arranged on the second bracket 231. The upper end of the detection rod 233 is provided with an identification part 234. When the first sensor 232 detects the identification part 234, the vibration disk 21 lacks material. Specifically, the vibration disk 21 causes the parts to make a circular motion in the vibration disk by vibration, and then moves in a spiral motion through the track inside the vibration disk; when there are many parts in the vibration disk 21, the lower end of the detection rod 233 contacts the parts, so that the detection rod 233 is at a larger inclination angle, and then the identification part 234 is away from the first sensor 232. When the parts in the vibration disk 21 are small, the height of the parts after stacking is low, the detection rod 233 rotates downward, and the identification part 234 moves toward the first sensor 232, so that the first sensor 232 recognizes the identification part 234, and transmits the signal to the PLC to control the operation of the feeding assembly 24. Among them, the first sensor 232 can be a proximity switch.

[0022] In one embodiment, if Figure 1-Figure 5 As shown, the first detection mechanism 3 includes a third bracket 31, a fixture 32, a fourth bracket 33 and a first camera 34. The fixture 32 is set on the workbench 1 through the third bracket 31. The fixture 32 is provided with a workpiece slot 36 that matches the parts. One end of the workpiece slot 36 is an open structure, which is connected to the guide rail 22 of the feeding mechanism 2, so that the parts arranged on the vibration plate 21 are fed into the workpiece slot 36. The first camera 34 is set on the workbench 1 through the fourth bracket 33, and the first camera 34 is located above the fixture. The upper surface image information of the parts in the fixture 32 is collected by the first camera 34, and then compared with the image information in the database. If the detection feature points are the same, it means that the upper surface detection of the parts is qualified.

[0023] In the above embodiment, if Figure 1-Figure 5 As shown, a slide rail is provided on the fourth bracket 33, and the first camera 34 is slidably connected to the slide rail, thereby adjusting the height position of the first camera 34 so that the first camera 34 meets the detection requirements.

[0024] In the above embodiment, if Figure 1-Figure 5 As shown, a first fill light 35 is arranged on the fourth bracket 33, and the product is illuminated by the first fill light 35 to increase the brightness and make the surface of the part clear. The first fill light 35 can be arranged on the guide rail, and the height position of the first fill light can be adjusted according to the detection requirements.

[0025] In the above embodiment, if Figure 1-Figure 5 As shown, a second sensor 37 is disposed at the bottom of the workpiece slot 36 to detect whether there are parts in the workpiece slot 36. When a part is detected, the first camera 34 is controlled to capture an image of the part.

[0026] In one embodiment, if Figure 1-Figure 9 As shown, the second detection mechanism 4 includes a fifth bracket 41, a second camera 42, a fixing fixture 43, a light source 44 and a lens 45. The fifth bracket 41 is arranged on the workbench 1, the fixing fixture 43 and the second camera 42 are arranged on the fifth bracket 41, and the second camera 42 is located below the fixing fixture 43. The lens 45 is arranged in the fixing fixture 43, the light source 44 is arranged in the fixing fixture 43, and a collection port 431 is arranged at the bottom of the fixing fixture 43. The lens 45 is used to reflect the side of the part to the collection port 431, and the image is collected by the second camera 42.

[0027] When in use, the light source 44 is used to supplement the light inside the fixed fixture 43, so that the collected image information is clear. The second camera 42 faces the collection port 431 to collect images, and the side image of the part is reflected to the collection port 431 through the ring-shaped lens 45, and collected by the second camera 42. Through the above structure, using the principle of image reflection of the lens 45, only one set of camera components is needed to realize image collection of the circumference and bottom of the part.

[0028] In one embodiment, if Figure 1-Figure 9 As shown, eight lenses 45 are provided, and the lenses 45 are arranged in a regular octagon in the fixing fixture 43. The number of lenses 45 is not limited to 8; in this embodiment, the number of lenses 45 is set to 8, and the regular octagonal distribution is a preferred solution. The eight lenses 45 can collect the side and the side connection, increase the collection range, and improve the detection accuracy.

[0029] In one embodiment, if Figure 1-Figure 9 As shown, the light source 44 is a ring-shaped structure, so that the light can be evenly irradiated in the fixing fixture 43.

[0030] In one embodiment, if Figure 1-Figure 9 As shown, a reflective portion 432 is protruded upward from the bottom of the fixing fixture 43, and the reflective portion 432 is a truncated cone structure. The light source is reflected by the reflective portion 432. The reflective portion 432 diffusely reflects the light, so that the light in the fixing fixture 43 is more uniform.

[0031] In one embodiment, if Figure 1-Figure 9 As shown, the fifth bracket 41 includes two vertical plates 411 and two horizontal plates 412 . The horizontal plates 412 are fixed to the lower surface of the workbench 1 . The vertical plates 411 are fixedly connected to the horizontal plates 412 , respectively. The fixing fixture 43 is installed and fixed on the top of the vertical plates 411 .

[0032] In the above embodiment, if Figure 1-Figure 9As shown, a plurality of fixing holes 413 are vertically spaced apart on the vertical plate 411, and the horizontal plate 412 is connected to the corresponding fixing holes on the vertical plate 411 by screws, thereby adjusting the height position of the vertical plate 411. Waist-shaped holes are provided on the horizontal plate 412, thereby adjusting the horizontal position of the vertical plate 411 and the distance between the two vertical plates 411.

[0033] In the above embodiment, if Figure 1-Figure 9 As shown, the second camera 42 is fixed to the fifth bracket 41 via a connecting plate 46. Specifically, a waist-shaped hole is provided on the connecting plate 46, and the connecting plate 46 is fixed to the fixing hole 413 by screws, and the height position of the connecting plate 46 can be adjusted, thereby realizing the adjustment of the height position of the second camera 42.

[0034] In one embodiment, if Figure 1-Figure 9 As shown, a second fill light 47 is disposed on the side of the fixing fixture 43 .

[0035] In one embodiment, if Figure 1-Figure 10 As shown, the transport mechanism 6 includes a sixth bracket 61, a first actuator 62, a second actuator 63, a third actuator 64 and a suction cup 65. The first actuator 62 is arranged on the workbench 1 through the sixth bracket 61, the second actuator 63 is arranged on the first actuator 62, the third actuator 64 is arranged on the second actuator 63, and the suction cup 65 is arranged on the third actuator 64. The first actuator 62 is used to drive the suction cup 65 to move horizontally, and the second actuator 63 and the third actuator 64 control the suction cup 65 to move vertically.

[0036] In the above embodiment, if Figure 1-Figure 10 As shown, the first actuator 62 is a rodless electric cylinder; the second actuator 63 is a screw slide, and the third actuator 64 is a pneumatic cylinder.

[0037] When in use, the suction cup 65 is driven to move horizontally by the first actuator 62 to move above the fixture 32, and the suction cup 65 is controlled to move downward by the third actuator 64, and the part is fixed by suction through negative pressure, and then the third actuator 64 is reset, and moved to the top of the fixed fixture 43 by the first actuator 62, and the height position of the part is adjusted by the second actuator 63, and then the part is driven to move downward to the lower limit position by the third actuator 64. After the detection is completed, the part is moved to the material distribution mechanism 5, and the part is put into the corresponding entrance according to the detection result. The cooperation of the second actuator 63 and the third actuator 64, if the screw slide is adjusted over a long distance, it takes a long time, and the cylinder is usually a fixed stroke, and the height positions of the fixture 32, the detection position of the second detection mechanism 4, and the feeding position of the material distribution mechanism 5 may be different. Therefore, the second actuator 63 and the third actuator 64 can achieve rapid adjustment.

[0038] In one embodiment, if Figure 1-Figure 11 As shown, the material distribution mechanism 5 includes a defective product guide pipe 51, a good product guide pipe 52 and a defective product storage box 53. The defective product guide pipe 51 and the good product guide pipe 52 are fixed on the workbench 1, and the feed inlets of the defective product guide pipe 51 and the good product guide pipe 52 are located within the moving stroke of the conveying mechanism 6, and the discharge port of the defective product guide pipe 51 extends to the defective product storage box 53, and the good product guide pipe 52 is guided to the outside of the workbench 1.

[0039] When the present invention is used, Figure 1-Figure 11 As shown, the parts are put into the silo 242, and the vibrator 244 drives the guide trough 243 to vibrate so as to send the parts into the vibration plate 21, and then the parts are arranged by the vibration plate 21, and sent into the workpiece slot 36 of the fixture 32 through the guide rail 22, and the upper surface of the parts is imaged by the first detection mechanism 3, and then the parts are moved to the second detection mechanism 4 by the conveying mechanism 6, and the side and bottom surfaces of the parts are imaged by the second camera 42, and compared according to the database information, and the parts are classified according to the detection results and put into the defective material guide tube 51 or the good material guide tube 52 through the conveying mechanism 6.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.

Claims

1. A visual inspection device for zinc alloy die castings, characterized in that: Including workbench, A feeding mechanism, the feeding mechanism is arranged on the workbench, and the parts are discharged by the feeding mechanism; A first detection mechanism, wherein the first detection machine is connected to the feeding mechanism and uses the first detection mechanism to collect images of the upper surface of the part; A second detection mechanism, wherein the second detection mechanism collects images of the side and bottom surfaces of the part; A material sorting mechanism, which performs classified storage according to parts inspection results; A transport mechanism, wherein the transport mechanism grabs the parts and moves between the first detection mechanism, the second detection mechanism and the material distribution mechanism.

2. A zinc alloy die casting visual inspection device according to claim 1, characterized in that: The feeding mechanism includes a vibration plate, a guide rail, a material shortage detection component and a material replenishment component. The discharge port of the vibration plate is connected to the first detection mechanism through the guide rail. The parts in the vibration plate are monitored by the material shortage detection component; the material replenishment component replenishes the vibration plate.

3. A zinc alloy die casting visual inspection device according to claim 2, characterized in that: The feeding assembly includes a first bracket, a material bin, a material guide trough and a vibrator, wherein the vibrator is arranged on the first bracket, the material guide trough is arranged on the vibrator, and the discharge end of the material guide trough extends above the vibration plate, and the material bin is located above the material guide trough.

4. The visual inspection equipment for zinc alloy die castings according to claim 2 is characterized in that: The material shortage detection assembly includes a second bracket, a first sensor and a detection rod. The second bracket is arranged on the workbench. The detection rod is rotatably arranged on the second bracket. An identification part is arranged on the upper end of the detection rod. When the first sensor detects the identification part, there is a shortage of material in the vibration plate.

5. The visual inspection equipment for zinc alloy die castings according to claim 1 is characterized in that: The first detection mechanism includes a third bracket, a jig, a fourth bracket and a first camera. The jig is arranged on the workbench through the third bracket. The jig is provided with a workpiece groove that matches the part, and one end of the workpiece groove is connected to the discharge port of the feeding mechanism; the first camera is arranged on the workbench through the fourth bracket, and the camera is located above the jig.

6. The zinc alloy die casting visual inspection equipment according to claim 1, characterized in that: The second detection mechanism includes a fifth bracket, a second camera, a fixed fixture, a light source and a lens. The fifth bracket is arranged on the workbench. The fixed fixture and the second camera are arranged on the fifth bracket, and the second camera is located below the fixed fixture. The lens ring is arranged in the fixed fixture. The light source is arranged in the fixed fixture. A collection port is arranged at the bottom of the fixed fixture. The lens is used to reflect the side of the part to the collection port, and the image is collected by the second camera.

7. The visual inspection equipment for zinc alloy die castings according to claim 6, characterized in that: The lenses are provided with eight pieces, and the lenses are arranged in the fixing fixture in the shape of a regular octagon.

8. The zinc alloy die casting visual inspection equipment according to claim 6, characterized in that: The light source is a ring structure.

9. The visual inspection equipment for zinc alloy die castings according to claim 6, characterized in that: A reflective portion is protruded upwards at the bottom of the fixing fixture, and the reflective portion is in a truncated cone structure.

10. The zinc alloy die casting visual inspection equipment according to claim 1, characterized in that: The transport mechanism includes a sixth bracket, a first actuator, a second actuator, a third actuator and a suction cup. The first actuator is arranged on the workbench through the sixth bracket, the second actuator is arranged on the first actuator, the third actuator is arranged on the second actuator, and the suction cup is arranged on the third actuator. The first actuator is used to drive the suction cup to move laterally, and the second actuator and the third actuator control the vertical movement of the suction cup.

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