Lens appearance defect inspection machine

Abstract

The invention discloses a lens appearance defect inspection machine which comprises a plurality of inspection units which are sequentially arranged in the transverse direction. The inspection unit is provided with a material receiving station, an inspection station and a feeding station, the inspection unit comprises an inspection instrument, a first conveying device and a second conveying device, the inspection instrument is used for inspecting lenses in the inspection station, the first conveying device is used for conveying the lenses in the material receiving station to the inspection station, and the second conveying device is used for conveying the lenses in the inspection station to the inspection station; the second conveying device is used for conveying the lenses in the inspection station to the feeding station; for two adjacent inspection units, the feeding station of the inspection unit located on the left side coincides with the receiving station of the inspection unit located on the right side. After the lens is conveyed to the inspection station of the current inspection unit to complete inspection of the current process, the lens is conveyed to the feeding station of the current inspection unit, the feeding station of the current inspection unit coincides with the receiving station of the next inspection unit, and the next inspection unit can perform inspection of the next process on the lens.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a lens appearance defect inspection machine. Background Art

[0002] During the production of camera lenses, there may be appearance defects such as dirt, dust, film deficiency, scars, and edge damage. Therefore, the lenses need to be inspected to screen out defective products. In order to improve the accuracy of the inspection, different defects of the lenses need to be inspected using different light sources, so that each lens has to go through multiple inspection processes; currently, each inspection process requires manual control of the inspection instrument, which consumes a lot of manpower and has low efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a lens appearance defect inspection machine.

[0004] According to an embodiment of the present invention, a lens appearance defect inspection machine includes a plurality of inspection units, which are arranged in sequence along the horizontal direction; the inspection unit has a material receiving station, an inspection station and a feeding station, and the inspection unit includes an inspection instrument, a first conveying device and a second conveying device, the inspection instrument is used to inspect the lenses in the inspection station, the first conveying device is used to convey the lenses in the material receiving station to the conveying inspection station, and the second conveying device is used to convey the lenses in the inspection station to the feeding station; for two adjacent inspection units, the feeding station of the inspection unit located on the left side overlaps with the material receiving station of the inspection unit located on the right side.

[0005] The lens appearance defect inspection machine according to the embodiment of the present invention has at least the following technical effects: when in use, the lens to be inspected can be placed at the material receiving station of the inspection unit located at the left end. After the lens is transported to the inspection station of the current inspection unit to complete the inspection of the current process, it is transported to the feeding station of the current inspection unit. Since the feeding station of the current inspection unit coincides with the material receiving station of the next inspection unit, the next inspection unit can perform the inspection of the next process on the lens. In this way, there is no need to manually operate the inspection instrument for each inspection process, so the manpower consumption is small and the efficiency is high.

[0006] According to some embodiments of the present invention, the inspection unit further comprises a second clamping jaw, and the second clamping jaw is disposed at the feeding station.

[0007] According to some embodiments of the present invention, the inspection unit further comprises a rotation drive device for driving the second clamping jaw to flip.

[0008] According to some embodiments of the present invention, the inspection unit also has a recovery station, and the inspection unit also includes a recovery tray and a fourth conveying device, the recovery tray is arranged below the recovery station, and the fourth conveying device is used to drive the second clamp to move between the recovery station and the feeding station.

[0009] According to some embodiments of the present invention, the inspection unit further includes a receiving basket, and the receiving basket is disposed below the feeding station.

[0010] According to some embodiments of the present invention, the inner bottom of the receiving basket is provided with a flat bottom surface and a buffer bottom surface, the buffer bottom surface extends obliquely upward from the edge of the flat bottom surface, and the buffer bottom surface is arranged below the feeding station.

[0011] According to some embodiments of the present invention, the lens appearance defect inspection machine also includes a dust removal unit, which includes a first clamp, a dust removal box and a third conveying device for driving the first clamp to move laterally, and the moving path of the first clamp is called a first path. The first path passes through the dust removal box laterally, and the right end of the first path coincides with the material receiving station of the inspection unit located at the left end.

[0012] According to some embodiments of the present invention, an air blowing mechanism is provided in the dust removal box, and the air blowing mechanism is used to blow air toward the first path from the upper side and the lower side of the first path.

[0013] According to some embodiments of the present invention, the lens appearance defect inspection machine also includes a loading unit, which includes a support plate, a loading nozzle and a three-axis drive mechanism for driving the loading nozzle, the moving range of the loading nozzle is called a first area, and a loading space for placing a material tray is provided on the upper side of the support plate, and the loading space is provided within the first area; the left end of the first path is provided within the first area of ​​the loading unit.

[0014] According to some embodiments of the present invention, the lens appearance defect inspection machine also includes a unloading unit, which has the same structure as the loading unit, and the feeding station of the inspection unit located at the right end is arranged in the first area of ​​the unloading unit.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 11 is a schematic diagram of the three-dimensional structure of a lens appearance defect inspection machine according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the feeding unit in FIG.

[0019] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the dust removal unit;

[0020] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the inspection unit;

[0021] Figure 5 yes Figure 4 Schematic diagram of the three-dimensional structure of the receiving basket.

[0022] In the attached figure:

[0023] 100-loading unit; 110-pallet; 120-three-axis driving mechanism; 121-loading nozzle; 200-dust removal unit; 210-dust removal box; 211-first path; 212-flat nozzle; 213-observation window; 214-axial flow fan; 220-third conveying device; 221-first clamp; 300-inspection unit; 311-first linear motor; 312-second linear motor; 313-third linear motor; 314-first nozzle; 320-second conveying device; 330-inspection station; 341-fourth linear motor; 342-fifth linear motor; 343-rotation drive device; 344-second clamp; 380-recovery tray; 390-receiving basket; 391-buffer bottom surface; 392-flat bottom surface; 400-unloading unit. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below are only used to explain the present invention and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, the directions or positional relationships indicated by descriptions such as up, down, front, back, left, right, etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating that the device or element referred to must have a specific direction or operate in a specific direction, and therefore cannot be understood as a limitation on the present invention. The meaning of several is one or more, the meaning of more is more than two, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, within, etc. are understood to include the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood to indicate relative importance or indicate the number of technical features indicated or indicate the order of the technical features indicated.

[0026] In the description of the present invention, words such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention based on the specific content of the technical solution.

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0028] Reference below Figures 1 to 5 A lens appearance defect inspection machine according to an embodiment of the present invention is described.

[0029] The lens appearance defect inspection machine of the embodiment of the present invention includes a plurality of inspection units 300, and the plurality of inspection units 300 are arranged in sequence along the horizontal direction; the inspection unit 300 has a material receiving station, an inspection station 330 and a feeding station, and the inspection unit 300 includes an inspection instrument, a first conveying device and a second conveying device 320, the inspection instrument is used to inspect the lenses in the inspection station 330, the first conveying device is used to convey the lenses in the material receiving station to the conveying inspection station 330, and the second conveying device 320 is used to convey the lenses in the inspection station 330 to the feeding station; for two adjacent inspection units 300, the feeding station of the inspection unit 300 located on the left side overlaps with the material receiving station of the inspection unit 300 located on the right side.

[0030] For example, Figure 4 As shown, each inspection unit 300 includes a workbench, and the inspection instrument, the first conveying device and the second conveying device 320 are all arranged on the upper side of the workbench, and the material receiving station, the inspection station 330 and the feeding station are also arranged on the upper side of the workbench; for two adjacent inspection units 300, the workbenches of the two inspection units 300 are fitted together for positioning so that the feeding station of the inspection unit 300 on the left overlaps with the material receiving station of the inspection unit 300 on the right, and in addition, a detachable connecting plate can be arranged to connect the two workbenches to fix the position.

[0031] Taking the inspection unit 300 located at the left end as an example, the material receiving station is arranged on the left rear side of the workbench, the inspection instrument and the inspection station 330 are arranged in the middle of the rear side of the workbench, the feeding station is arranged on the right rear side of the workbench, and the first conveying device and the second conveying device 320 are arranged on the front side of the workbench; the first conveying device includes a first linear motor 311 extending forward and backward, a second linear motor 312 extending laterally, a third linear motor 313 arranged vertically and a first suction nozzle 314, the main body of the first linear motor 311 is arranged on the workbench, the main body of the second linear motor 312 is arranged on the movable part of the first linear motor 311, the main body of the third linear motor 313 is arranged on the movable part of the second linear motor 312, and the first suction nozzle 314 is arranged on the third linear motor The movable part of the machine 313, so that the first conveying device can drive the first suction nozzle 314 to move forward and backward, horizontally and up and down; the second conveying device 320 includes a second suction nozzle, and the second conveying device 320 can be consistent with the structure of the first conveying device. Of course, in addition to this, the distance between the receiving station and the inspection station 330 can also be set to be equal to the distance between the inspection station 330 and the feeding station, so that even if the relative position of the second suction nozzle and the first suction nozzle 314 remains unchanged, the lenses in the receiving station can be transported to the conveying inspection station 330 and the lenses in the inspection station 330 can be transported to the feeding station at the same time, so that the second suction nozzle can share the first linear motor 311 and / or the second linear motor 312 and / or the third linear motor 313 with the first suction nozzle 314.

[0032] It is understandable that the inspection instrument for lens appearance defects is a commonly used device in the field, which illuminates the lens through a light source and identifies the appearance defects of the lens through a visual camera. The inspection instruments used to inspect different defects usually only differ in the type of light source, the position of the light source, and the camera distance, and their specific structures are not described in detail here. In this embodiment, the inspection instruments provided by each inspection unit 300 may be different. For example, some inspection instruments may use a backlight, some inspection instruments may use a plane shadowless light source, and some inspection instruments may use a coaxial light source, etc., to adapt to different inspection processes and inspect different appearance defects.

[0033] When the lens appearance defect inspection machine of the present embodiment is used, the lens to be inspected can be placed at the material receiving station of the inspection unit 300 located at the left end. After the lens is conveyed to the inspection station 330 of the current inspection unit 300 to complete the inspection of the current process, it is conveyed to the feeding station of the current inspection unit 300. Since the feeding station of the current inspection unit 300 coincides with the material receiving station of the next inspection unit 300, the next inspection unit 300 can inspect the lens for the next process. In this way, there is no need to manually operate the inspection instrument for each inspection process, so the manpower consumption is small and the efficiency is high.

[0034] In some embodiments of the present invention, the inspection unit 300 further includes a second clamp 344, which is disposed at the feeding station. The second clamp 344 can be an electric clamp or a pneumatic clamp, and the second clamp 344 includes a left clamp arm and a right clamp arm, which are arranged at intervals from left to right, and the feeding station is arranged between the left clamp arm and the right clamp arm. In this way, after the lens is transported to the feeding station, it can be clamped and temporarily stored by the second clamp 344, so that the transfer of the lens between the two inspection units 300 is smoother; in addition, the second clamp 344 can clamp the edge of the lens to prevent contamination of the lens surface.

[0035] In some embodiments of the present invention, the inspection unit 300 further includes a rotation drive device 343 for driving the second clamping jaw 344 to flip. It should be noted that some appearance defects require flipping the lens to be inspected from different angles. In the prior art, the inspection method is to take the lens out of the inspection instrument, manually flip the lens, and then return it to the inspection instrument, which consumes a lot of manpower. In this embodiment, by setting a rotation drive device 343, the lens can be clamped and flipped by the second clamping jaw 344 after the inspection of the current inspection unit 300 is completed, and then transferred to the next inspection unit 300, without manually flipping the lens, which is conducive to improving the degree of automation. Among them, the rotation drive device 343 can be a rotary cylinder, which is arranged on the rear side of the second clamping jaw 344.

[0036] In some embodiments of the present invention, the inspection unit 300 also has a recycling station, and the inspection unit 300 also includes a recycling tray 380 and a fourth conveying device. The recycling tray 380 is arranged below the recycling station, and the fourth conveying device is used to drive the second clamping jaw 344 to move between the recycling station and the feeding station. When in use, when it is detected that the lens has defects, the second conveying device 320 conveys the defective lens to the second clamping jaw 344, and the fourth conveying device conveys the second clamping jaw 344 to the recycling station, and then the second clamping jaw 344 releases the defective lens, so that the defective lens falls into the recycling tray 380, so as to facilitate the recycling of the defective lens; wherein, in this embodiment, the fourth conveying device is arranged to convey the second clamping jaw 344, and the second clamping jaw 344 conveys the defective lens from the feeding station to the recycling station, instead of the second conveying device 320 conveying the defective lens from the inspection station 330 to the recycling station, the process of conveying the defective lens to the recycling tray 380 is , and the process of conveying the next lens by the second conveying device 320 can be carried out synchronously, which will not affect the inspection of the next lens and avoid reducing the work efficiency; wherein, the fourth conveying device includes a fourth linear motor 341 extending forward and backward and a fifth linear motor 342 extending laterally, the main body of the fourth linear motor 341 is arranged on the workbench, the main body of the fifth linear motor 342 is arranged on the movable part of the fourth linear motor 341, and the rotation drive device 343 is connected between the movable part of the fifth linear motor 342 and the second clamp 344, so that the fourth conveying device drives the rotation drive to translate together with the second clamp 344.

[0037] In some embodiments of the present invention, the inspection unit 300 further includes a receiving basket 390, which is disposed below the feeding station. It should be noted that when the lens is transported to the feeding station for transfer, the second clamping jaw 344 may occasionally fail to clamp the lens and cause the lens to fall off; in this embodiment, by providing the receiving basket 390, the lens that falls off the second clamping jaw 344 can be collected by the receiving basket 390 for easy recycling.

[0038] In some embodiments of the present invention, reference Figure 5 The inner bottom of the receiving basket 390 is provided with a flat bottom surface 392 and a buffer bottom surface 391. The buffer bottom surface 391 extends upward from the edge of the flat bottom surface 392 at an angle. The buffer bottom surface 391 is provided below the feeding station. In this way, when a lens falls, the buffer bottom surface 391 can play a role in unloading force, which is helpful to reduce the damage caused by the lens falling. Moreover, the last lens that fell can slide to the flat bottom surface 392 for temporary storage, and the next lens that falls will not directly fall on the last lens that fell, which is also helpful to reduce the damage caused by the lens falling. Among them, the material of the buffer bottom surface 391 can be a flexible material, which further reduces the damage caused by the lens falling.

[0039] In some embodiments of the present invention, the lens appearance defect inspection machine further includes a dust removal unit 200, referring to Figure 3 The dust removal unit 200 includes a first clamping jaw 221, a dust removal box 210, and a third conveying device 220 for driving the first clamping jaw 221 to move horizontally. The moving path of the first clamping jaw 221 is called a first path 211. The first path 211 passes through the dust removal box 210 in the horizontal direction. The right end of the first path 211 coincides with the material receiving station of the inspection unit 300 located at the left end. The dust removal unit 200 is arranged on the left side of all inspection units 300. The structure of the first clamping jaw 221 can be consistent with that of the second clamping jaw 344. The first path 211 is arranged on the rear side of the dust removal box 210. The wall of the dust removal box 210 is provided with an opening adapted to the first path 211, so that the first clamping jaw 221 can pass through the dust removal box 210 along the first path 211. In this way, before the lens is transported to the inspection unit 300 for inspection, it can first pass through the dust removal box 210 for dust removal, which is conducive to making the inspection result more accurate. Among them, the third conveying device 220 can be a linear motor.

[0040] In some embodiments of the present invention, a blowing mechanism is provided in the dust box 210, and the blowing mechanism is used to blow air from the upper side and the lower side of the first path 211 to the first path 211. The blowing mechanism includes two flat nozzles 212, and the two flat nozzles 212 are respectively provided on the upper side and the lower side of the first path 211; in addition, a box door is also provided on the front side of the dust box 210, so that the box door can be opened to inspect the dust box 210, and the box door can be provided with an observation window 213, and the observation window 213 is provided with a sealing plate made of a transparent material; in addition, an air extraction hole is provided at the bottom of the dust box 210, and an axial flow fan 214 is provided at the air extraction hole, and a filter sponge is provided on the upper side cover of the odor hole. When in use, the axial flow fan 214 extracts air from the dust box 210, so that the dust in the dust box 210 can be collected in the filter sponge.

[0041] In some embodiments of the present invention, the lens appearance defect inspection machine further includes a loading unit 100, referring to Figure 2 The loading unit 100 includes a support plate 110, a loading nozzle 121, and a three-axis driving mechanism 120 for driving the loading nozzle 121. The moving range of the loading nozzle 121 is called the first area. The upper side of the support plate 110 is provided with a loading space for placing a material tray, and the loading space is arranged in the first area; the left end of the first path 211 is arranged in the first area of ​​the loading unit 100. The loading unit 100 is arranged on the left side of the dust removal unit 200. The three-axis driving mechanism 120 can drive the loading nozzle 121 to move along the x, y, and z axes. The three-axis driving mechanism 120 is a conventional technical means in this field, and its specific structure is not described here. In this way, the staff can place a material tray with multiple lenses in the loading space, and the loading unit 100 can sequentially send multiple lenses to the first clamping jaw 221. The first clamping jaw 221 sequentially drives the lenses to pass through the dust removal box 210 and then transport them to the inspection unit 300, so as to realize continuous inspection of multiple lenses.

[0042] Among them, quick-change disks can be arranged between the first conveying device and the first suction nozzle 314, between the second conveying device 320 and the second suction nozzle, and between the three-axis drive mechanism 120 and the loading suction nozzle 121, so as to facilitate the replacement of suction nozzles of different sizes to adapt to lenses of different sizes; taking the loading unit 100 as an example, the quick-change disk includes a robot side part and a tool side part, the robot side part is arranged on the three-axis drive mechanism 120, and the tool side part is arranged on the loading suction nozzle 121, and two suction nozzle placement seats are arranged in the first area, one of the suction nozzle placement seats is used to place the loading suction nozzle 121, and the other suction nozzle placement seat is placed with a large lens suction nozzle, and the large lens suction nozzle is also provided with a tool side part; when in use, the three-axis drive mechanism 120 can put down the loading suction nozzle 121 and take out the large lens suction nozzle to adapt to larger lenses.

[0043] In some embodiments of the present invention, the lens appearance defect inspection machine further includes a material unloading unit 400, which has the same structure as the material loading unit 100, and the feeding station of the inspection unit 300 at the right end is arranged in the first area of ​​the material unloading unit 400. Figure 1 The unloading unit 400 is arranged on the right side of all the inspection units 300, so that the multiple lenses that have been inspected can be sequentially transported to the material tray of the unloading unit 400, which is convenient for taking and placing the lenses. The loading unit 100, the unloading unit 400, the dust removal unit 200 and each inspection unit 300 are all independent units and can be combined according to actual needs to meet different requirements.

[0044] The preferred embodiments of the present invention are specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A lens appearance defect inspection machine, characterized in that: The invention comprises a plurality of inspection units (300), wherein the plurality of inspection units (300) are arranged in sequence in a horizontal direction; the inspection unit (300) comprises a material receiving station, an inspection station (330) and a feeding station, and the inspection unit (300) comprises an inspection instrument, a first conveying device and a second conveying device (320); the inspection instrument is used for inspecting lenses in the inspection station (330); the first conveying device is used for conveying lenses in the material receiving station to a conveying inspection station (330); the second conveying device (320) is used for conveying lenses in the inspection station (330) to the feeding station; for two adjacent inspection units (300), the feeding station of the inspection unit (300) located on the left side overlaps with the material receiving station of the inspection unit (300) located on the right side.

2. The lens appearance defect inspection machine according to claim 1, characterized in that: The inspection unit (300) further comprises a second clamping jaw (344), wherein the second clamping jaw (344) is arranged at the feeding station.

3. The lens appearance defect inspection machine according to claim 2, characterized in that: The inspection unit (300) further comprises a rotation driving device (343) for driving the second clamping jaw (344) to flip.

4. The lens appearance defect inspection machine according to claim 2, characterized in that: The inspection unit (300) also has a recovery station, and the inspection unit (300) also includes a recovery tray (380) and a fourth conveying device, wherein the recovery tray (380) is arranged below the recovery station, and the fourth conveying device is used to drive the second clamp (344) to move between the recovery station and the feeding station.

5. The lens appearance defect inspection machine according to claim 1, characterized in that: The inspection unit (300) further comprises a receiving basket (390), and the receiving basket (390) is arranged below the feeding station.

6. The lens appearance defect inspection machine according to claim 5, characterized in that: The inner bottom of the receiving basket (390) is provided with a flat bottom surface (392) and a buffer bottom surface (391), and the buffer bottom surface (391) extends obliquely upward from the edge of the flat bottom surface (392), and the buffer bottom surface (391) is arranged below the feeding station.

7. The lens appearance defect inspection machine according to claim 1, characterized in that: It also includes a dust removal unit (200), which includes a first clamping jaw (221), a dust removal box (210) and a third conveying device (220) for driving the first clamping jaw (221) to move laterally, and the moving path of the first clamping jaw (221) is called a first path (211), and the first path (211) passes through the dust removal box (210) in the horizontal direction, and the right end of the first path (211) coincides with the material receiving station of the inspection unit (300) located at the left end.

8. The lens appearance defect inspection machine according to claim 7, characterized in that: An air blowing mechanism is provided in the dust removal box (210), and the air blowing mechanism is used to blow air toward the first path (211) from the upper side and the lower side of the first path (211).

9. The lens appearance defect inspection machine according to claim 7, characterized in that: The device also comprises a loading unit (100), wherein the loading unit (100) comprises a support plate (110), a loading nozzle (121) and a three-axis driving mechanism (120) for driving the loading nozzle (121); the moving range of the loading nozzle (121) is referred to as a first area; a loading space for placing a material tray is provided on the upper side of the support plate (110); and the loading space is provided within the first area; and the left end of the first path (211) is provided within the first area of ​​the loading unit (100).

10. The lens appearance defect inspection machine according to claim 9, characterized in that: It also includes a material unloading unit (400), the material unloading unit (400) has the same structure as the material loading unit (100), and the feeding station of the inspection unit (300) located at the right end is arranged in the first area of ​​the material unloading unit (400).

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