Appearance detection equipment for glass-sealed MELF device

Abstract

The invention discloses appearance detection equipment for a glass-sealed MELF device. The appearance detection equipment comprises a rack; the transmission belt material unit comprises a driving wheel, a driven wheel, a steel belt, a steel rail and a pressing wheel set, and the steel belt is wound on the driving wheel and the driven wheel; the feeding unit is used for realizing single feeding of the devices; the end face detection unit is used for detecting the end face of the device; the poor end face material reducing unit is used for reducing materials of the devices with unqualified end faces; the cylindrical surface detection unit is used for detecting the cylindrical surface of the device; the poor cylindrical surface material reducing unit is used for reducing materials of the devices with unqualified cylindrical surfaces; and a material receiving box. Compared with the prior art, the problem that appearance detection of the glass-sealed MELF device is inconvenient is solved.

Description

Technical Field

[0001] The invention relates to the technical field of wafer resistor manufacturing, and in particular to appearance detection equipment for glass-sealed MELF devices. Background Art

[0002] MELF resistors, also known as leadless resistors, are a special type of resistor. The name comes from its design feature, which is that it has no leads and is fixed to the circuit board through surface mount technology (SMT). The MELF resistor is designed with a cylindrical structure, and its resistance value is achieved by depositing a metal alloy film on an advanced ceramic body and cutting a spiral groove.

[0003] When glass-sealed MELF devices are inspected after processing, due to the small size of MELF devices and the inconvenience of appearance inspection, it is difficult to efficiently realize comprehensive inspection of both side end faces and cylindrical surfaces of MELF devices, and defective devices cannot be effectively screened out. Summary of the invention

[0004] The object of the present invention is to provide a glass-sealed MELF device appearance inspection device to solve the problem of inconvenience in appearance inspection of glass-sealed MELF devices.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a glass-sealed MELF device appearance inspection device, comprising:

[0006] frame;

[0007] The transmission belt material unit comprises a driving wheel, a driven wheel, a steel belt, a steel rail and a pressure wheel group, wherein the steel belt is wound on the driving wheel and the driven wheel, a square hole for positioning the device is arranged on the steel belt, the steel rail is fixedly mounted on the frame, a first positioning groove of a shape matching the steel belt is arranged on the steel rail, the steel belt is arranged in the first positioning groove, a gap is arranged between the steel belt and the bottom surface of the first positioning groove, and cylindrical defective blanking holes and qualified blanking holes arranged in sequence are arranged on the first positioning groove, and a plurality of pressure wheel groups are arranged in sequence along the length direction of the steel rail, and a pressure wheel group comprises pressure wheels symmetrically arranged on both sides of the steel rail, the pressure wheels are rotatably mounted on the pressure wheel seat, and the pressure wheel surface contacts the steel belt;

[0008] A feeding unit, which is used to realize a single feeding of a device;

[0009] An end face detection unit, which is used to detect the end face of the device;

[0010] The end face defect reduction unit is used to reduce the material of the components that fail the end face detection;

[0011] A cylindrical surface detection unit, which is used to detect the cylindrical surface of the device;

[0012] A cylinder defect reduction unit, which is used to reduce the components that fail the cylinder detection;

[0013] Collection box.

[0014] As a further description of the above technical solution:

[0015] The center position of the pressure wheel surface in the width direction corresponds to the gap between the steel belt and the side wall of the first positioning groove.

[0016] As a further description of the above technical solution:

[0017] The feeding unit includes a feeding bow guard seat, a feeding wheel, an external movable bow guard and a hopper. The axle of the feeding wheel is connected to the first stepper motor. The feeding wheel is rotatably arranged in the feeding bow guard seat. The external movable bow guard is fixedly installed on the feeding bow guard seat. The external movable bow guard blocks the feeding wheel. The hopper is fixedly installed on the feeding bow guard seat. A guide flow channel is arranged in the hopper 34.

[0018] As a further description of the above technical solution:

[0019] The end face detection unit includes a first imaging unit and a second imaging unit symmetrically arranged on both sides of the material wheel. The first imaging unit includes a first angle coaxial light source and a first visual camera. A first end face detection hole corresponding to the position of the first angle coaxial light source is provided on the feed guard bow seat. The first visual camera is arranged above the first angle coaxial light source.

[0020] As a further description of the above technical solution:

[0021] The end surface defect reduction unit comprises an air blowing joint and an end surface reduction box, and the air blowing joint and the end surface reduction box are symmetrically arranged on both sides of the belt wheel.

[0022] As a further description of the above technical solution:

[0023] The cylindrical detection unit includes a strip light source and a third imaging unit. The strip light source is arranged along the conveying direction of the steel belt, and the illumination direction of the strip light source is toward the steel belt. Several third imaging units are arranged in sequence along the length direction of the strip light source. The third imaging unit includes a third visual camera and a backlight source. The third visual camera is arranged above the steel belt, and the backlight source is arranged below the steel rail. A waist-shaped hole corresponding to the position of the backlight source is arranged on the bottom surface of the first positioning groove of the steel rail.

[0024] As a further description of the above technical solution:

[0025] The cylindrical defective material lowering unit includes a material lowering cylinder and a material lowering plate. The material lowering plate is fixedly installed on the output end of the material lowering cylinder. A material guide plate is arranged on the material lowering plate. The material guide plate is slidably connected in a slide groove on the rail. A material lowering hole is arranged on the material guide plate. The slide groove is perpendicular to the first positioning groove. The upper surface of the material guide plate is flush with the bottom surface of the first positioning groove. The cylindrical defective material dropping hole is arranged on the bottom surface of the slide groove.

[0026] As a further description of the above technical solution:

[0027] The receiving box is provided with a defective product storage bin whose position corresponds to the defective blanking hole of the cylindrical surface, and the receiving box is also provided with a qualified product storage bin whose position corresponds to the qualified product blanking hole.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. In the present invention, the end face detection unit detects both end faces of the glass-sealed MELF device simultaneously through the first imaging unit and the second imaging unit symmetrically arranged on both sides of the material wheel.

[0030] 2. In the present invention, since the steel belt in the transmission belt unit drives the device to transport in a straight line, the device is not positioned, so that the device rolls on the bottom surface of the first positioning groove during the transportation process. When the device is transported to the cylindrical detection unit, it moves and rotates at the same time, so that the imaging unit at the cylindrical detection unit can take sufficient photos of the device cylinder for inspection, effectively screening out devices with cylindrical defects and avoiding missed inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a structural schematic diagram of a glass-sealed MELF device appearance inspection equipment.

[0033] Figure 2 The figure is a schematic diagram of the structure of a conveying material unit in a glass-sealed MELF device appearance inspection device.

[0034] Figure 3 The figure is a cross-sectional view of a conveying belt unit in a glass-sealed MELF device appearance inspection device.

[0035] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0036] Figure 5The figure is a schematic diagram of the structure of a feeding unit in a glass-sealed MELF device appearance inspection device.

[0037] Figure 6 The figure is a schematic diagram of the structure of the end face detection unit in a glass-sealed MELF device appearance detection equipment.

[0038] Figure 7 The figure is a schematic diagram of the structure of the first imaging unit in a glass-sealed MELF device appearance inspection device.

[0039] Figure 8 The figure is a schematic diagram of the structure of a cylindrical surface detection unit in a glass-sealed MELF device appearance detection device.

[0040] Fig. 9 This is a schematic diagram of the structure of a columnar defect reduction unit in a glass-sealed MELF device appearance inspection equipment.

[0041] Fig.10 It is a structural schematic diagram of a material receiving box in a glass-sealed MELF device appearance inspection device.

[0042] Legend:

[0043] 1. Frame;

[0044] 2. Drive belt unit; 21. Driving wheel; 22. Steel belt; 221. Square hole; 23. Steel rail; 231. First positioning groove; 232. Poor cylindrical blanking hole; 233. Good blanking hole; 234. Waist-shaped hole; 235. Slide; 24. Press wheel;

[0045] 3. Feeding unit; 31. Feeding guard seat; 32. Feeding wheel; 33. External live guard; 331. Second end face detection hole; 34. Hopper; 341. Guide channel;

[0046] 4. End face detection unit; 41. First imaging unit; 411. First corner coaxial light source; 412. First visual camera; 42. Second imaging unit;

[0047] 5. End surface defective material lowering unit; 51. Air blowing joint; 52. End surface lowering box;

[0048] 6. cylindrical detection unit; 61. strip light source; 62. third imaging unit; 621. third visual camera; 622. backlight source;

[0049] 7. Material lowering unit for bad cylindrical surface; 71. Material lowering cylinder; 72. Material lowering plate; 721. Material guide plate; 722. Material lowering hole;

[0050] 8. Material collection box; 81. Defective product storage bin; 82. Qualified product storage bin. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0054] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Example 1

[0057] See also Figure 1-10 The present invention provides a technical solution: a glass-sealed MELF device appearance inspection device, comprising:

[0058] Rack 1;

[0059] The transmission belt material unit 2 comprises a driving wheel 21, a driven wheel, a steel belt 22, a steel rail 23 and a pressure wheel group. The steel belt 22 is wound on the driving wheel 21 and the driven wheel. The steel belt 22 is provided with a square hole 221 for positioning the device. The steel rail 23 is fixedly mounted on the frame 1. The steel rail 23 is provided with a first positioning groove 231 whose shape matches the steel belt 22. The steel belt 22 is arranged in the first positioning groove 231. A gap is provided between the steel belt 22 and the bottom surface of the first positioning groove 231. The first positioning groove 231 is provided with cylindrical defective blanking holes 232 and qualified blanking holes 233 arranged in sequence. Several pressure wheel groups are arranged in sequence along the length direction of the steel rail 23. One pressure wheel group comprises pressure wheels 24 symmetrically arranged on both sides of the steel rail 23. The pressure wheels 24 are rotatably mounted on the pressure wheel seat. The surface of the pressure wheel 24 contacts the steel belt 22.

[0060] A feeding unit 3, which is used to realize a single feeding of a device;

[0061] An end face detection unit 4, which is used to detect the end face of the device;

[0062] The end surface defect reduction unit 5 is used to reduce the material of the components that fail the end surface detection;

[0063] A cylindrical surface detection unit 6, which is used to detect the cylindrical surface of the device;

[0064] A cylinder defect reduction unit 7, which is used to reduce the components that fail the cylinder detection;

[0065] Material receiving box 8.

[0066] The feeding unit 3 includes a feeding bow seat 31, a feeding wheel 32, an external movable bow 33 and a hopper 34. The axle of the feeding wheel 32 is connected to the first stepper motor. The feeding wheel 32 is rotatably arranged in the feeding bow seat 31. The external movable bow 33 is fixedly installed on the feeding bow seat 31. The external movable bow 33 blocks the feeding wheel 32. The hopper 34 is fixedly installed on the feeding bow seat 31. A guide flow channel 341 is arranged in the hopper 34.

[0067] When the glass-sealed MELF device is loaded, the glass-sealed MELF device is manually poured in from the top opening of the hopper 34, and the glass-sealed MELF device flows downward along the guide flow channel 341 and is converted to be placed horizontally, and the glass-sealed MELF device is introduced into the upper material trough of the material wheel 32, and the inner wall of the feeding bow seat 31 prevents the glass-sealed MELF device from escaping from the upper material trough of the material wheel 32, and then the material wheel 32 drives the glass-sealed MELF device to rotate and transport, and when the glass-sealed MELF device rotates until the opening of the material trough is perpendicular to the steel belt 22, the glass-sealed MELF device is no longer blocked by the outer protective bow 33, and the glass-sealed MELF device falls and enters the upper hole 221 of the steel belt 22.

[0068] The end face detection unit 4 includes a first imaging unit 41 and a second imaging unit 42 symmetrically arranged on both sides of the material wheel 32. The first imaging unit 41 includes a first corner coaxial light source 411 and a first visual camera 412. A first end face detection hole corresponding to the position of the first corner coaxial light source 411 is provided on the feed bow seat 31. The first visual camera 412 is arranged above the first corner coaxial light source 411.

[0069] The end face detection unit 4 detects both end faces of the glass-sealed MELF device simultaneously through the first imaging unit 41 and the second imaging unit 42 symmetrically arranged on both sides of the belt wheel 32 .

[0070] When the glass-sealed MELF device is subjected to end face inspection, taking the first imaging unit 41 as an example, when the material wheel 32 drives the glass-sealed MELF device to rotate to the first end face inspection hole, the first corner coaxial light source 411 illuminates the end face of one side of the glass-sealed MELF device, and the first visual camera 412 collects images to realize end face inspection.

[0071] The structure and working principle of the second imaging unit 42 are the same as those of the first imaging unit 41. A second end face detection hole 331 is provided on the outer protective arch 33 to facilitate the second imaging unit 42 to detect the other end face of the glass-sealed MELF device.

[0072] The first end surface detection hole and the second end surface detection hole 331 have different heights, so as to avoid mutual interference between the corner coaxial light sources of the first imaging unit 41 and the second imaging unit 42 and improve the end surface detection quality.

[0073] The end surface defective material removal unit 5 comprises an air blowing joint 51 and an end surface material removal box 52, which are symmetrically arranged on both sides of the belt wheel 32. The air blowing joint 51 is fixedly mounted on the outer live guard bow 33, and the air blowing joint 51 is connected to the air source. For glass-sealed MELF devices that fail the end surface inspection, the airflow blown by the air blowing joint 51 passes through the through hole on the outer live guard bow 33, so that the glass-sealed MELF devices on the belt wheel 32 pass through the through hole on the feed guard bow seat 31 and fall into the end surface material removal box 52, thereby realizing the material removal of defective end surface products.

[0074] The cylindrical detection unit 6 includes a strip light source 61 and a third imaging unit 62. The strip light source 61 is arranged along the conveying direction of the steel belt 22. The illumination direction of the strip light source 61 is toward the steel belt 22. Several third imaging units 62 are arranged in sequence along the length direction of the strip light source 61. The third imaging unit 62 includes a third visual camera 621 and a backlight source 622. The third visual camera 621 is arranged above the steel belt 22, and the backlight source 622 is arranged below the steel rail 23. A waist-shaped hole 234 corresponding to the position of the backlight source 622 is arranged on the bottom surface of the first positioning groove 231 of the steel rail 23.

[0075] When the glass-sealed MELF device is inspected for cylinder, the device moves and rotates at the same time, and the cylindrical image of the device is collected by at least one third imaging unit 62 in the inspection area formed by the strip light source 61, such as the two third imaging units 62 shown in the figure. The device in the square hole 221 of the steel strip 22 is fully illuminated by the strip light source 61 on the upper side and the backlight source 622 on the lower side, thereby improving the image acquisition quality and fully detecting the cylinder defects.

[0076] Specifically, two strip light sources 61 may be used, and the third imaging unit 62 captures images through the gap between the two strip light sources 61 .

[0077] The cylindrical defective material lowering unit 7 includes a material lowering cylinder 71 and a material lowering plate 72. The material lowering plate 72 is fixedly installed on the output end of the material lowering cylinder 71. A material guide plate 721 is arranged on the material lowering plate 72. The material guide plate 721 is slidably connected in the slide groove 235 on the rail 23. A material lowering hole 722 is arranged on the material guide plate 721. The slide groove 235 is perpendicular to the first positioning groove 231. The upper surface of the material guide plate 721 is flush with the bottom surface of the first positioning groove 231. The cylindrical defective material dropping hole 232 is arranged on the bottom surface of the slide groove 235.

[0078] When it is necessary to lower the material of the device with defective cylindrical surface, before the device is transported to the defective cylindrical surface drop hole 232 on the first positioning groove 231, the lowering cylinder 71 drives the lowering plate 72 to move, and the guide plate 721 slides forward in the slide groove 235, so that the position of the lowering hole 722 on the guide plate 721 corresponds to the defective cylindrical surface drop hole 232, so that when the device with defective cylindrical surface is transported here, it falls through the lowering hole 722 and the defective cylindrical surface drop hole 232 in turn and leaves the rail 23, and then the lowering plate 72 retreats and resets, the guide plate 721 closes the defective cylindrical surface drop hole 232, and the qualified device is transported normally until it moves to the qualified product drop hole 233 on the rail 23 for unloading and collection.

[0079] The receiving box 8 is provided with a defective product storage bin 81 whose position corresponds to the cylindrical defective blanking hole 232, and the receiving box 8 is also provided with a qualified product storage bin 82 whose position corresponds to the qualified product blanking hole 233, so as to realize the classified storage of cylindrical defective components and qualified components and simplify the receiving structure.

[0080] Working principle: The transmission belt unit 2 on the frame 1 realizes the linear conveyance of the device. The device falls into the square hole 221 on the steel belt 22 that matches the device. The device is supported by the bottom surface of the first positioning groove 231 on the steel rail 23. The stepper motor drives the driving wheel 21 to rotate, and the driving wheel 21 pulls the steel belt 22 to move. The device is transported forward and in a straight line with the steel belt 22. Since the steel belt 22 in the transmission belt unit 2 drives the device to transport in a straight line, the device is not positioned, so that the device rolls on the bottom surface of the first positioning groove 231 during the conveying process. When the device is transported to the cylindrical detection unit 6, it moves and rotates at the same time, so that the imaging unit at the cylindrical detection unit 6 takes full photos of the cylindrical surface of the device for inspection, effectively screening out devices with cylindrical defects to avoid missed inspections.

[0081] Example 2

[0082] This embodiment further provides the following improved technical solution based on the above embodiment: the center position of the wheel surface of the pressure wheel 24 in the width direction corresponds to the gap between the steel belt 22 and the side wall of the first positioning groove 231 .

[0083] The pressure wheel 24 presses the upper surfaces of the steel belt 22 and the steel rail 23 at the same time, and uses the upper surface of the steel rail 23 to prevent the pressure wheel 24 from deforming and settling, thereby fully ensuring the positioning effect of the pressure wheel 24 on the steel belt 22.

[0084] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A glass-sealed MELF device appearance inspection equipment, characterized in that: include: frame; A transmission belt material unit, comprising a driving wheel, a driven wheel, a steel belt, a steel rail and a pressure wheel group, wherein the steel belt is wound on the driving wheel and the driven wheel, the steel belt is provided with a square hole for positioning a device, the steel rail is fixedly mounted on the frame, the steel rail is provided with a first positioning groove whose shape matches the steel belt, the steel belt is arranged in the first positioning groove, a gap is provided between the steel belt and the bottom surface of the first positioning groove, the first positioning groove is provided with cylindrical defective blanking holes and qualified blanking holes arranged in sequence, a plurality of pressure wheel groups are arranged in sequence along the length direction of the steel rail, one of the pressure wheel groups comprises pressure wheels symmetrically arranged on both sides of the steel rail, the pressure wheels are rotatably mounted on a pressure wheel seat, and the pressure wheel surface contacts the steel belt; A feeding unit, which is used to realize a single feeding of a device; An end face detection unit, which is used to detect the end face of the device; The end face defect reduction unit is used to reduce the material of the components that fail the end face detection; A cylindrical surface detection unit, which is used to detect the cylindrical surface of the device; A cylinder defect reduction unit, which is used to reduce the components that fail the cylinder detection; Collection box.

2. The appearance inspection equipment for glass-sealed MELF devices according to claim 1, characterized in that: The center position of the pressure wheel surface in the width direction corresponds to the gap between the steel belt and the side wall of the first positioning groove.

3. The appearance inspection equipment for glass-sealed MELF devices according to claim 1, characterized in that: The feeding unit includes a feeding bow guard seat, a feeding wheel, an external movable guard bow and a hopper. The axle of the feeding wheel is connected to the first stepper motor. The feeding wheel is rotatably arranged in the feeding bow guard seat. The external movable guard bow is fixedly installed on the feeding bow guard seat. The external movable guard bow blocks the feeding wheel. The hopper is fixedly installed on the feeding bow guard seat. A guide flow channel is arranged in the hopper.

4. The appearance inspection equipment for glass-sealed MELF devices according to claim 1, characterized in that: The end face detection unit includes a first imaging unit and a second imaging unit symmetrically arranged on both sides of the material wheel, the first imaging unit includes a first angle coaxial light source and a first visual camera, a first end face detection hole corresponding to the position of the first angle coaxial light source is provided on the feed bow seat, and the first visual camera is arranged above the first angle coaxial light source.

5. The appearance inspection equipment for glass-sealed MELF devices according to claim 1, characterized in that: The end surface defect reduction unit comprises an air blowing joint and an end surface reduction box, and the air blowing joint and the end surface reduction box are symmetrically arranged on both sides of the belt wheel.

6. The appearance inspection equipment for glass-sealed MELF devices according to claim 1, characterized in that: The cylindrical detection unit includes a strip light source and a third imaging unit. The strip light source is arranged along the conveying direction of the steel strip. The illumination direction of the strip light source is toward the steel strip. Several third imaging units are arranged in sequence along the length direction of the strip light source. The third imaging unit includes a third visual camera and a backlight source. The third visual camera is arranged above the steel strip. The backlight source is arranged below the steel rail. A waist-shaped hole corresponding to the position of the backlight source is arranged on the bottom surface of the first positioning groove of the steel rail.

7. The appearance inspection equipment for glass-sealed MELF device according to claim 1, characterized in that: The cylindrical defective material lowering unit includes a material lowering cylinder and a material lowering plate, wherein the material lowering plate is fixedly mounted on the output end of the material lowering cylinder, a material guide plate is arranged on the material lowering plate, and the material guide plate is slidably connected in a slide groove on the rail, a material lowering hole is arranged on the material guide plate, the slide groove is perpendicular to the first positioning groove, the upper surface of the material guide plate is flush with the bottom surface of the first positioning groove, and the cylindrical defective material dropping hole is arranged on the bottom surface of the slide groove.

8. The appearance inspection equipment for glass-sealed MELF devices according to claim 1, characterized in that: The material receiving box is provided with a defective product storage bin whose position corresponds to the defective material dropping hole of the cylindrical surface, and the material receiving box is also provided with a qualified product storage bin whose position corresponds to the qualified product dropping hole.

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