Appearance and size detection equipment for front cover of mobile phone

Abstract

The utility model discloses a mobile phone front cover appearance and size detection device which comprises a rack, two conveying line assemblies are arranged in the center of the top face of the rack, a multi-shaft material taking assembly is arranged on the top face of the rack, and an AOI detection assembly and an NG stock bin assembly are arranged on one side of the top face of the rack. According to the utility model, the appearance and size of the machine front cover can be detected, the detection device is simple, rapid and high-precision online detection of the appearance and size of a detected object can be realized, and compared with manual detection, the detection precision is high, the multi-axis material taking assembly can move in a three-axis manner, and meanwhile, the angle is changed through the rotating cylinder, so that the detection efficiency is improved. The distance between products is changed through the distance changing mechanism, a series of actions of material taking and material placing are achieved, the products of the AOI detection assembly can be moved to the NG stock bin assembly while the products are moved to the AOI detection assembly from the conveying line assembly, the two actions are carried out synchronously, efficiency is higher, and the automation degree is high.

Description

Technical Field

[0001] This utility model relates to the technical field of mobile phone front cover inspection equipment, specifically a device for inspecting the appearance and dimensions of mobile phone front covers. Background Technology

[0002] In the mobile phone industry, appearance defects are extremely common in mobile phone front covers. These defects mainly manifest as flaws in pad printing dimensions, overall dimensions, groove dimensions, window dimensions, inner and outer diameters of AR circular holes, missing teeth, sand holes, color discrepancies, and edge transparency. These defects not only affect the appearance of the front cover but also lead to significant waste of raw materials and the production of substandard products during the assembly of other components. Furthermore, these defects are exacerbated during use, resulting in a substantial decrease in the overall structural strength and stability of the front cover. Therefore, to ensure the stability of the front cover during service, appearance inspection is crucial. Currently, the industry's main inspection methods for mobile phone front covers include: multi-angle appearance inspection under artificial daylight and inspection using different light sources. However, these methods have the following drawbacks:

[0003] This monitoring method wastes manpower and resources, and the high rate of misjudgment is caused by subjective human judgment. In addition, the inspection process for appearance defects is complicated and inefficient.

[0004] Therefore, we propose a device for inspecting the appearance and dimensions of mobile phone front covers to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a device for inspecting the appearance and dimensions of mobile phone front covers, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for inspecting the appearance and dimensions of a mobile phone front cover, comprising a frame, two conveyor line assemblies arranged at the center of the top surface of the frame, a multi-axis material handling assembly arranged on the top surface of the frame, and an AOI inspection assembly and an NG material hopper assembly arranged on one side of the top surface of the frame;

[0007] The multi-axis material handling assembly includes two first support trusses and two second support trusses. The two first support trusses are vertically fixed to one side of the top surface of the frame, and the two second support trusses are vertically fixed to the other side of the top surface of the frame. The two conveyor line assemblies are positioned between the first and second support trusses. An X-axis linear motor is fixed to the top surface of the two first support trusses, and a linear guide rail is fixed to the top surface of the two second support trusses. Two Y-axis linear motors are horizontally slidably arranged between the X-axis linear motors and the linear guide rails. A sliding stage is fixed to the output of the Y-axis linear motors. A Z-axis sliding stage cylinder is fixed to the bottom of the sliding stage. A rotary cylinder is fixed to the output of the Z-axis sliding stage cylinder. A pitch-changing mechanism is fixed to the output end of the rotary cylinder. Four vacuum suction heads are fixed to the four output ends of the pitch-changing mechanism.

[0008] Preferably, each Y-axis linear motor has a drive block fixedly connected to one end near the X-axis linear motor, and each Y-axis linear motor has a guide slider fixedly connected to the linear guide rail. The drive block is fixedly connected to the output part of the X-axis linear motor, and the guide slider is horizontally slidably connected to the linear guide rail.

[0009] Preferably, the conveyor assembly includes a conveyor frame fixed to the top surface of the frame, two belt conveyors fixed to the inner side of the conveyor frame, the two belt conveyors being parallel to each other, a slide connected horizontally to the inner side of the conveyor frame below the two belt conveyors, a lifting cylinder fixed to the side wall of the slide, and a feeding hopper fixed to the top surface of one end of the conveyor frame.

[0010] Preferably, the conveyor frame is fixedly connected to a blocking cylinder at a position below the two belt conveyor lines, a speed regulator is fixedly connected to the conveyor frame, a clamping cylinder is fixedly sleeved on the bottom side wall of the feeding hopper, and a lead screw drive motor is fixedly connected to the conveyor frame.

[0011] Preferably, the AOI inspection assembly includes an AOI linear transport motor and an AOI inspection column. The AOI linear transport motor is fixed to the top surface of the frame, and the AOI inspection column is fixed to the top surface of the frame at both sides of the AOI linear transport motor. Two inspection floating modules are fixed to the top side wall of the AOI linear transport motor. A camera is fixed to the bottom of the output end of each inspection floating module. A lens is fixed to the bottom of the camera. A rodless cylinder is fixed to the bottom of the lens. A coaxial light source is fixed to the bottom of the rodless cylinder. A ring light source is fixed to the bottom of the coaxial light source. Four product vacuum adsorption stages are fixed to the output part of the AOI linear transport motor.

[0012] Preferably, the NG hopper assembly includes two vertical linear modules, each vertical linear module output section is fixedly connected to an NG conveyor belt, and each vertical linear module sidewall is snapped with a portable hopper, the portable hopper having open structures at both ends, and the NG conveyor belt passing through the portable hopper.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention can inspect the appearance and dimensions of the machine front cover. The inspection device is simple and can achieve fast and high-precision online inspection of the appearance and dimensions of the object being inspected. Compared with manual inspection, it does not require a large number of people to operate. The inspection accuracy is high. The multi-axis material handling component can move along three axes. At the same time, the angle is changed by a rotary cylinder and the product spacing is changed by a pitch mechanism to realize a series of actions of picking up and unloading materials. While moving the product from the conveyor assembly to the AOI inspection assembly, the product of the AOI inspection assembly is also moved to the NG hopper assembly. The two actions are performed simultaneously, which is more efficient and has a high degree of automation. Attached Figure Description

[0015] Figure 1 These are schematic diagrams of the main structure in the first and second embodiments of this utility model;

[0016] Figure 2 These are schematic diagrams of the conveyor line assembly in the first and second embodiments of this utility model;

[0017] Figure 3 These are schematic diagrams of the multi-axis material handling assembly in the first and second embodiments of this utility model;

[0018] Figure 4 These are schematic diagrams of the AOI detection component in the first and second embodiments of this utility model;

[0019] Figure 5 This is a schematic diagram of the NG hopper assembly in the first and second embodiments of this utility model.

[0020] In the diagram: 1. Frame; 2. Conveyor assembly; 3. Multi-axis material handling assembly; 4. AOI inspection assembly; 5. NG hopper assembly; 21. Conveyor frame; 22. Belt conveyor; 23. Carriage; 24. Lifting cylinder; 25. Loading hopper; 26. Blocking cylinder; 27. Speed ​​controller; 28. Clamping cylinder; 29. ​​Motor with lead screw drive; 31. First support truss; 32. Second support truss; 33. X-axis linear motor; 34. Linear guide rail; 35. Y-axis linear motor; 36. 37. Sliding stage; 38. Z-axis sliding stage cylinder; 39. Rotary cylinder; 30. Pitch-changing mechanism; 310. Vacuum adsorption head; 311. Drive block; 312. Guide slider; 41. AOI linear conveyor motor; 42. AOI inspection column; 43. Product vacuum adsorption stage; 44. Inspection floating module; 45. Camera; 46. Lens; 47. Rodless cylinder; 48. Coaxial light source; 49. Ring light source; 51. Vertical linear module; 52. Portable hopper; 53. NG conveyor belt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0022] Please see Figure 1-5 This utility model provides a technical solution: a device for inspecting the appearance and size of a mobile phone front cover, including a frame 1, two conveyor line assemblies 2 are arranged at the center of the top surface of the frame 1, a multi-axis material handling assembly 3 is arranged on the top surface of the frame 1, and an AOI inspection assembly 4 and an NG material hopper assembly 5 are arranged on one side of the top surface of the frame 1.

[0023] The multi-axis material handling assembly 3 includes two first support trusses 31 and two second support trusses 32. The two first support trusses 31 are vertically fixed to one side of the top surface of the frame 1, and the two second support trusses 32 are vertically fixed to the other side of the top surface of the frame 1. Two conveyor line assemblies 2 are positioned between the first support trusses 31 and the second support trusses 32. An X-axis linear motor 33 is fixed to the top surface of the two first support trusses 31, and a linear guide rail 34 is fixed to the top surface of the two second support trusses 32. A horizontal sliding connection is provided between the X-axis linear motor 33 and the linear guide rail 34. Two Y-axis linear motors 35 are connected to a sliding stage 36 at their outputs. A Z-axis sliding cylinder 37 is connected to the bottom of the sliding stage 36. A rotary cylinder 38 is connected to the output of the Z-axis sliding cylinder 37. A pitch-changing mechanism 39 is connected to the output of the rotary cylinder 38. Four vacuum suction heads 310 are connected to the four outputs of the pitch-changing mechanism 39. The multi-axis material handling assembly 3 can move along three axes. At the same time, the angle can be changed by the rotary cylinder 38 and the product spacing can be changed by the pitch-changing mechanism 39, realizing a series of actions such as material handling and material release, and achieving full automation of inspection. Example

[0024] Please see Figure 1-5 This is the second embodiment of the present invention. Based on the previous embodiment, each Y-axis linear motor 35 is fixedly connected to a drive block 311 near one end of the X-axis linear motor 33. Each Y-axis linear motor 35 is fixedly connected to a guide slider 312 near the linear guide rail 34. The drive block 311 is fixedly connected to the output part of the X-axis linear motor 33, and the guide slider 312 is horizontally slidably connected to the linear guide rail 34.

[0025] The conveyor assembly 2 includes a conveyor frame 21 fixed to the top surface of the frame 1. Two belt conveyors 22 are fixed to the inner side of the conveyor frame 21. The two belt conveyors 22 are parallel to each other. A slide 23 is horizontally slidably connected to the inner side of the conveyor frame 21 below the two belt conveyors 22. A lifting cylinder 24 is fixed to the side wall of the slide 23. A feeding bin 25 is fixed to the top surface of one end of the conveyor frame 21. The conveyor assembly 2 is used for product feeding and unloading of OK products.

[0026] The conveyor frame 21 is located below the two belt conveyor lines 22 and is fixedly connected to the blocking cylinder 26. The speed regulator 27 is fixedly connected to the conveyor frame 21. The bottom side wall of the feeding hopper 25 is fixedly connected to the clamping cylinder 28. The conveyor frame 21 is fixedly connected to the lead screw drive motor 29.

[0027] The AOI inspection component 4 includes an AOI linear transport motor 41 and an AOI inspection column 42. The AOI linear transport motor 41 is fixed to the top surface of the frame 1. The AOI inspection column 42 is fixed to the top surface of the frame 1 and located on both sides of the AOI linear transport motor 41. Two inspection floating modules 44 are fixed to the top side wall of the AOI linear transport motor 41. A camera 45 is fixed to the bottom of the output end of each inspection floating module 44. A lens 46 is fixed to the bottom of the camera 45. A rodless cylinder 47 is fixed to the bottom of the lens 46. A coaxial light source 48 is fixed to the bottom of the rodless cylinder 47. A ring light source 49 is fixed to the bottom of the coaxial light source 48. Four product vacuum adsorption stages 43 are fixed to the output part of the AOI linear transport motor 41. The AOI inspection component 4 can inspect the appearance of products and also inspect the dimensions of products.

[0028] The NG hopper assembly 5 includes two vertical linear modules 51. Each vertical linear module 51 has an NG conveyor belt 53 fixed to its output section. Each vertical linear module 51 has a portable hopper 52 snapped onto its side wall. Both ends of the portable hopper 52 are open structures. The NG conveyor belt 53 passes through the portable hopper 52. The NG hopper assembly 5 can classify and store NG products for easy subsequent processing. Example

[0029] Please see Figure 1-5This is the third embodiment of the present invention, based on the above two embodiments. When using this invention, two methods can be used for loading. One method is as follows: Manually, the pallet of products to be inspected can be placed into the loading hopper 25. Then, the screw-driven motor 29 drives the lifting cylinder 24 to lift the pallet of products to be inspected from the loading hopper 25. The clamping cylinder 28 retracts, and the lifting cylinder 24 moves downwards by one pallet position. Then, the clamping cylinder 28 extends to support the remaining pallets in the loading hopper 25. After receiving a signal feedback, the lifting cylinder 24 continues to move downwards back to its original position and places the pallet onto the belt conveyor 22. After loading is completed, the belt conveyor 22 carries the pallet to the product loading station for inspection, thus stopping the cylinder. 26 blocks the pallet, and then the lifting cylinder 24 lifts the pallet to wait for the multi-axis material handling assembly 3 to pick up the material; another feeding method is: the belt conveyor 22 directly connects to the upstream equipment, and the pallet of products to be inspected flows directly into the belt conveyor 22 and flows to the product loading station. Then, the blocking cylinder 26 blocks the pallet, and the lifting mechanism 12 lifts the pallet to wait for the multi-axis material handling assembly 3 to pick up the material; then the inspection work can be carried out. The X-axis linear motor 33 of the multi-axis material handling assembly 3 can carry a set of Y-axis linear motors 35 and other accessories to move. When the material arrives at the loading station of the conveyor assembly 2, the X-axis linear motor 33 and the Y-axis linear motor 35 at the front of the multi-axis material handling assembly 3 move to the loading station to pick up the material. The Z-axis slide cylinder 37 moves downwards, and the end of the pitch-changing mechanism 39 is equipped with four sets of vacuum adsorption heads 310 for vacuum adsorption of the products. After the products are adsorbed, the Z-axis slide cylinder 37 retracts, and the front Y-axis linear motor 35 moves to the AOI detection component 4. Then, the rotary cylinder 38 rotates 90° to align the product direction with the detection direction. The pitch-changing mechanism 39 then changes the material pick-up distance from the tray to ensure that the four product vacuum adsorption tables 43 are installed at the same distance. The product vacuum adsorption tables 43 are mounted on the mover of the AOI linear conveying motor 41. The pitch-changing mechanism 39 first places two products from one side onto two of the product vacuum adsorption tables 43, and then moves the remaining two products one position by the Y-axis linear motor 35 to place them. The product is placed on two other vacuum adsorption tables 43. After the product is unloaded, it returns to the loading position for secondary unloading. After the product is loaded, the vacuum adsorption table 43 first positions the product and then performs vacuum adsorption to prevent the product from moving during the process. Then, the AOI linear conveyor motor 41 carries 4 products from the loading position to the inspection position. The inspection floating module 44 carries a camera 45 and a lens 46, which, together with the coaxial light source 48, performs appearance inspection on the product. After the inspection is completed, the rodless cylinder 47 carries the coaxial light source 48 to move and avoid it. Then, the inspection floating module 44 carries a camera 45 and a lens 46, which, together with the ring light source 49, performs size inspection on the product. After the inspection is completed, the AOI linear conveyor motor 41 carries the product to the inspection unloading position for unloading.After the AOI linear conveyor motor 41 reaches the unloading position, the Y-axis linear motor 35 at the rear of the multi-axis picking assembly 3 moves to the loading position to pick up the product. Once in position, the Z-axis slide cylinder 37 moves downwards. The variable pitch mechanism 39 is also equipped with four sets of vacuum adsorption heads 310 at its end, which pick up four products from the product vacuum adsorption platform 43 at a time. Then, the AOI linear conveyor motor 41 returns the product vacuum adsorption platform to the inspection and loading position to await loading. Based on the inspection results, the rear of the multi-axis picking assembly 3 first moves to the NG conveyor belt 53 to remove NG products. The NG conveyor belt 53 has two... The products are categorized into appearance NG and size NG, each corresponding to a set of vertical linear modules 51 and portable hoppers 52. The multi-axis material handling assembly 3 first places one NG product onto the NG conveyor belt 53. During the feeding process on one NG conveyor belt 53, another NG product is placed onto another NG conveyor belt 53. For each NG product stored in the portable hopper 52 carried by the vertical linear module 51, the vertical linear module 51 rises one material level until it is full (fifteen products). At this point, the equipment alarms, and the portable hopper 52 is manually removed, and the NG products are taken away. The portable material bin 52 is then returned to its original position. The Y-axis linear motor 35 at the rear end of the multi-axis material handling assembly 3 continues to feed materials. After the NG products are fed, the Y-axis linear motor 35 at the rear end of the multi-axis material handling assembly 3 carries the OK products to the unloading position of the conveyor assembly 2 for unloading. One product is placed at a time until the OK products are fed. The rear end of the multi-axis material handling assembly 3 returns to the unloading position of the AOI detection assembly 4 to wait for material picking. Then, the lifting cylinder 24 at the unloading position of the conveyor assembly 2 descends, the blocking cylinder 26 descends, and the tray flows to the downstream equipment. This utility model can inspect the appearance and dimensions of the machine front cover. Moreover, the detection device is simple and can achieve rapid and high-precision online detection of the appearance and size of the object being tested. Compared with manual inspection, it does not require a large number of people to operate, and the detection accuracy is high. The multi-axis material handling component 3 can move along three axes, and the angle can be changed by the rotary cylinder 38, and the product spacing can be changed by the pitch mechanism 39, realizing a series of actions of picking up and unloading materials. While moving the product from the conveyor assembly 2 to the AOI inspection assembly 4, it also moves the product from the AOI inspection assembly 4 to the NG hopper assembly 5. The two actions are performed simultaneously, which is more efficient and has a high degree of automation.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for inspecting the appearance and dimensions of a mobile phone front cover, comprising a frame (1), characterized in that: Two conveyor line assemblies (2) are provided at the center of the top surface of the frame (1), a multi-axis material handling assembly (3) is provided on the top surface of the frame (1), and an AOI detection assembly (4) and an NG hopper assembly (5) are provided on one side of the top surface of the frame (1). The multi-axis material handling assembly (3) includes two first support trusses (31) and two second support trusses (32). The two first support trusses (31) are vertically fixed to one side of the top surface of the frame (1), and the two second support trusses (32) are vertically fixed to the other side of the top surface of the frame (1). The two conveyor line assemblies (2) are positioned between the first support trusses (31) and the second support trusses (32). An X-axis linear motor (33) is fixed to the top surface of the two first support trusses (31), and the top surface of the two second support trusses (32) is fixed to the top surface of the conveyor line assembly (2). A linear guide rail (34) is fixedly connected to the surface. Two Y-axis linear motors (35) are horizontally slidably arranged between the X-axis linear motor (33) and the linear guide rail (34). The output part of the Y-axis linear motor (35) is fixedly connected to a sliding stage (36). The bottom of the sliding stage (36) is fixedly connected to a Z-axis sliding cylinder (37). The output part of the Z-axis sliding cylinder (37) is fixedly connected to a rotary cylinder (38). The output end of the rotary cylinder (38) is fixedly connected to a pitch-changing mechanism (39). The four output ends of the pitch-changing mechanism (39) are fixedly connected to four vacuum suction heads (310).

2. The device for detecting the appearance and dimensions of a mobile phone front cover according to claim 1, characterized in that: Each Y-axis linear motor (35) has a drive block (311) fixed to one end near the X-axis linear motor (33), and each Y-axis linear motor (35) has a guide slider (312) fixed to one end near the linear guide rail (34). The drive block (311) is fixed to the output part of the X-axis linear motor (33), and the guide slider (312) is horizontally slidably connected to the linear guide rail (34).

3. The device for detecting the appearance and dimensions of a mobile phone front cover according to claim 1, characterized in that: The conveyor assembly (2) includes a conveyor frame (21) fixed to the top surface of the frame (1). Two belt conveyor lines (22) are fixed to the inner side of the conveyor frame (21). The two belt conveyor lines (22) are parallel to each other. A slide (23) is horizontally slidably connected to the inner side of the conveyor frame (21) below the two belt conveyor lines (22). A lifting cylinder (24) is fixed to the side wall of the slide (23). A feeding bin (25) is fixed to the top surface of one end of the conveyor frame (21).

4. The device for detecting the appearance and dimensions of a mobile phone front cover according to claim 3, characterized in that: The conveyor frame (21) is located below the two belt conveyor lines (22) and a blocking cylinder (26) is fixedly connected. A speed regulator (27) is fixedly connected to the conveyor frame (21). A clamping cylinder (28) is fixedly sleeved on the bottom side wall of the feeding hopper (25). A screw drive motor (29) is fixedly connected to the conveyor frame (21).

5. The device for detecting the appearance and dimensions of a mobile phone front cover according to claim 1, characterized in that: The AOI inspection component (4) includes an AOI linear transport motor (41) and an AOI inspection column (42). The AOI linear transport motor (41) is fixed to the top surface of the frame (1). The AOI inspection column (42) is fixed to the top surface of the frame (1) on both sides of the AOI linear transport motor (41). Two inspection floating modules (44) are fixed to the top side wall of the AOI linear transport motor (41). A camera (45) is fixed to the bottom of the output end of each inspection floating module (44). A lens (46) is fixed to the bottom of the camera (45). A rodless cylinder (47) is fixed to the bottom of the lens (46). A coaxial light source (48) is fixed to the bottom of the rodless cylinder (47). A ring light source (49) is fixed to the bottom of the coaxial light source (48). Four product vacuum adsorption stages (43) are fixed to the output part of the AOI linear transport motor (41).

6. The device for detecting the appearance and dimensions of a mobile phone front cover according to claim 1, characterized in that: The NG hopper assembly (5) includes two vertical linear modules (51), each vertical linear module (51) has an output section fixed to an NG conveyor belt (53), and each vertical linear module (51) has a side wall clipped to a portable hopper (52). Both ends of the portable hopper (52) are open structures, and the NG conveyor belt (53) passes through the portable hopper (52).

Images