A device for detecting appearance defects of micro components

Abstract

The present invention provides a device for detecting appearance defects of tiny components. The present invention carries a product by a glass turntable, and the glass turntable is not provided with a portion for supporting and limiting the product. Therefore, after the product is placed on the glass turntable, only one side of the product is in contact with the glass turntable, so that the appearance of the six sides of the product can be detected without turning the product over. In addition, after the product is placed on the glass turntable, an electrostatic field adsorption force is provided to the glass turntable through an electrode to fix the product on the glass turntable. Therefore, when the glass turntable drives the product to move, even if the glass turntable is not provided with a portion for supporting and limiting the product, the product will basically not shift or detach from the glass turntable due to centrifugal force and inertia. The present invention belongs to the technical field of visual detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of visual inspection, and in particular relates to a device for inspecting appearance defects of tiny components. Background Art

[0002] In conventional product appearance inspection equipment, in order to facilitate the transportation of products to various inspection stations for appearance inspection, a carrier is generally used to carry and fix the product. After the product is placed on the carrier, the surface where the product contacts the carrier will be blocked. When inspecting all six sides of the product, it is necessary to use a fixture or manually turn the product over, resulting in low inspection efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a device for detecting appearance defects of tiny components to solve the technical problems described in the background technology.

[0004] The device for detecting appearance defects of micro-components comprises a motor, a glass turntable, a feeding track and a fixing seat, wherein the motor drives the glass turntable to rotate, the feeding track is provided with a discharge port, the feeding track is inclined downward to the discharge port and is located on the glass turntable, so that when the glass turntable rotates, a plurality of products can be arranged on the glass turntable through the discharge port, and a detection station for product appearance detection is arranged around the glass turntable, and an electrode located below the glass turntable is installed on the fixing seat, and the electrode is used to provide electrostatic field adsorption force to the glass turntable, and after the product is placed on the glass turntable and the glass turntable drives the product to move, the product is located above the electrode or can pass above the electrode, and the surface roughness of the glass turntable is 20-50nm, and the light transmittance of the corresponding glass turntable is 97-92%;

[0005] A guide block is installed next to the discharge port. The guide block is used to push the product on the glass turntable to correct itself. The guide block is provided with a vacuum adsorption hole. The vacuum adsorption hole is used to adsorb the product dropped from the discharge port. When the glass turntable rotates, the product is taken away from the vacuum adsorption hole by the adsorption force of the electrostatic field.

[0006] When the glass turntable is full of products, the inspection station can inspect the bottom surface of the product through electrodes, inspect the four sides of the product by obliquely irradiating it, and inspect the top surface of the product. The glass turntable is divided into several sectors by reflective strips. The fixed seat is equipped with a light sensor, which is used to sense the return light refracted by the reflective strip to achieve sector positioning. The discharge port is equipped with a meter, which is used to count and number the products that fall into the glass turntable, so as to locate all the products on the glass turntable based on the sector positioning and product numbering of the glass turntable.

[0007] According to the technical solution, the present invention can achieve the following beneficial effects:

[0008] 1. Since the product is carried on the glass turntable and the glass turntable is not provided with a part for supporting and limiting the product, after the product is placed on the glass turntable, only one side of the product is in contact with the glass turntable, so that the appearance inspection of the six sides of the product can be carried out without turning the product over;

[0009] 2. After the product is placed on the glass turntable, the glass turntable is provided with an electrostatic field adsorption force through the electrode to fix the product on the glass turntable. Therefore, when the glass turntable drives the product to move, even if the glass turntable is not provided with a part for supporting and limiting the product, the product will basically not shift or leave the glass turntable due to centrifugal force and inertia;

[0010] 3. As the glass turntable is a disc-shaped structure, it can realize a closed loop and high-speed cyclic transfer of the product while occupying a small space, so that the inspection station can conduct multiple inspections on the product to ensure the accuracy of the inspection. At the same time, it can also improve the inspection efficiency. In addition, it can also facilitate loading and unloading;

[0011] 4. Since the surface roughness of the glass turntable is adjusted to 20-50nm, the transmittance of the glass turntable is also reduced to 97-92%. The visual system located at the inspection station can take pictures of the contact parts of the product and the glass turntable. The product will not be unable to be clearly photographed because the transmittance of the glass turntable is only 97-92%. However, adjusting the surface roughness of the glass turntable to 20-50nm can effectively avoid the probability of materials flying out of the glass turntable.

[0012] 5. After several products fall from the discharge port and before they fall onto the glass turntable, they are adsorbed by the vacuum adsorption holes. After that, when the glass turntable rotates, the electrostatic field adsorption force is used to take the products away from the vacuum adsorption holes, thereby adjusting the posture of the products into a unified shape.

[0013] 6. Since sectors and products can be positioned, the suction nozzle can accurately find unqualified products and products that have completed the inspection, and absorb and remove these products. In addition, after the suction nozzle takes out the product, the discharge port can replenish the product at the corresponding position, thereby further improving the inspection efficiency and reducing the waste of equipment resources.

[0014] In order to further optimize the above technical solution, it can be optionally combined with one or more of the following implementation methods without conflict.

[0015] In some embodiments, the electrode is a regional copper electrode located at a certain position below the glass turntable. When the glass turntable drives the product to move, the product passes over the regional copper electrode. The copper surface of the regional copper electrode is plated with gold to increase the surface conductivity. When a high-voltage DC voltage is applied to the regional copper electrode, the glass surface is polarized, allowing the product to be adsorbed on the glass through the electrostatic field force.

[0016] According to the technical solution, the present invention can further achieve the following beneficial effects:

[0017] 1. Since the regional copper electrode is only located at a certain position below the glass turntable, the part where the product contacts the glass turntable can be inspected by simply moving the product away from the top of the regional copper electrode;

[0018] 2. Since the copper surface of the regional copper electrode is gold-plated, the surface conductivity is increased, so that the glass surface can be polarized by applying a high-voltage DC voltage to the electrode, so that when the product moves away from the top of the regional copper electrode, the product can still be better fixed on the glass turntable.

[0019] In some embodiments, the electrode is a ring electrode distributed around the bottom of the glass turntable, and the ring electrode is provided with a PET transparent electrode. After the product is placed on the glass turntable, the product is located above the ring electrode, so that the ring electrode can provide an electrostatic field adsorption force for the part where the glass turntable and the product are in contact, and the light transmittance of the PET transparent electrode is above 92%;

[0020] According to the technical solution, the present invention can further achieve the following beneficial effects:

[0021] 1. Since the light transmittance of the PET transparent electrode is over 92%, even if the product is located above the PET transparent electrode, it will not affect the detection of the part where the product contacts the glass turntable;

[0022] 2. Since the electrode is a ring electrode, the ring electrode can be distributed around the bottom of the glass turntable, so that the electrostatic field adsorption force can be uniformly provided to the glass turntable, thereby driving the product to move on the glass turntable, and the product can be fixed on the glass turntable more stably.

[0023] In some embodiments, the surface resistance of the PET transparent electrode is 1Ω / cm 2 , the fixing seat is made of fiberglass;

[0024] According to the technical solution, the overall surface voltage is made consistent, which neither affects the functions of optical fiber and visual detection nor causes significant changes in the electrostatic field force.

[0025] In some embodiments, the device for detecting appearance defects of micro-components further comprises a power supply unit for inputting a 7 kV DC voltage to the electrode, and the motor is used to drive the glass turntable to rotate at a speed of 160 r / min;

[0026] According to the technical solution, the electrode can provide sufficient electrostatic field adsorption force to the glass turntable. At the same time, when the glass turntable drives the product to move, the probability of the product flying out of the glass turntable can be further reduced.

[0027] In some embodiments, the surface roughness of the glass turntable is 50 nm, and the light transmittance of the corresponding glass turntable is 92%;

[0028] According to the technical solution, by reducing the light transmittance of the glass turntable from 97% to 92% in exchange for increasing the surface roughness of the glass turntable from 20nm to 50nm, the friction coefficient between the product and the glass turntable is increased without affecting the defect detection function of the visual system, thereby further reducing the probability of the product flying out of the glass turntable.

[0029] In some embodiments, a device for inspecting appearance defects of micro-components further includes a power module for driving a discharge port to move horizontally above a glass turntable, so that a plurality of products can be arranged in a circular manner on the glass turntable through the discharge port, and the power module further drives a suction nozzle located above the glass turntable to move horizontally, and the suction nozzle is used to suck the products on the glass turntable;

[0030] According to the technical solution, large-scale inspection can be carried out on a glass turntable. At the same time, the inspection-completed and unqualified products can be taken out by using a suction nozzle, thereby further improving the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation of the present invention, the following is a brief description of the drawings and reference numerals required to be used in describing the specific implementation.

[0032] Figure 1 is a top surface structure layout diagram of embodiments 1 to 4;

[0033] Figure 2 yes Figure 1 A partial enlarged view of the portion A shown;

[0034] Figure 3 is a bottom surface structure layout diagram of embodiments 1 to 4;

[0035] Figure 4 is a top surface structure layout diagram of embodiments 5 to 7;

[0036] Figure 5 yes Figure 4 A partial enlarged view of part B is shown;

[0037] Figure 6 is a bottom surface structure layout diagram of embodiments 5 to 7;

[0038] Figure 7 is a schematic diagram of the structure of the fixing base described in Examples 5 to 7;

[0039] Figure 8 It is a schematic diagram of the product structure of bread-like materials;

[0040] Fig. 9 It is a schematic diagram of the product structure in a conventional rectangular shape;

[0041] Fig.10 This is a schematic diagram of the sector structure shown in Example 7

[0042] Reference numerals:

[0043] 1. Glass turntable; 2. Loading track; 21. Discharge port; 22. Guide block; 23. Vacuum adsorption hole; 3. Fixed seat; 4. Electrode; 41. PET transparent electrode; 5. Sector; 51. Reflective strip; 6. Product. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0045] like Figures 1 to 10 As shown, this specific embodiment provides a device for detecting appearance defects of tiny components, including a motor, a glass turntable 1, a loading track 2 and a fixing seat 3. The motor drives the glass turntable 1 to rotate. The loading track 2 is provided with a discharge port 21. The loading track 2 is tilted downward to the discharge port 21 and is located on the glass turntable 1, so that when the glass turntable 1 rotates, a number of products 6 can be arranged on the glass turntable 1 through the discharge port 21. The periphery of the glass turntable 1 is provided with an inspection station for performing appearance inspection on the product 6. The fixing seat 3 is installed with an electrode 4 located below the glass turntable 1. The electrode 4 is used to provide an electrostatic field adsorption force to the glass turntable 1. After the product 6 is placed on the glass turntable 1 and the glass turntable 1 drives the product 6 to move, the product 6 is located above the electrode 4 or can pass above the electrode 4.

[0046] Since the product 6 is carried by the glass turntable 1 and the glass turntable 1 is not provided with a portion for supporting and limiting the product 6, after the product 6 is placed on the glass turntable 1, only one side of the product 6 is in contact with the glass turntable 1, so that the appearance of the six sides of the product 6 can be inspected without turning the product 6 over.

[0047] After the product 6 is placed on the glass turntable 1, the electrode 4 provides an electrostatic field adsorption force to the glass turntable 1, so as to fix the product 6 on the glass turntable 1. Therefore, when the glass turntable 1 drives the product 6 to move, even if the glass turntable 1 is not provided with a portion for supporting and limiting the product 6, the product 6 will basically not shift or leave the glass turntable 1 due to centrifugal force and inertia.

[0048] Since the glass turntable 1 is a disc-shaped structure, it can realize a closed loop and high-speed cyclic transfer of the product 6 while occupying a small space, so that the inspection station can perform multiple inspections on the product 6 to ensure the accuracy of the inspection. At the same time, it can also improve the inspection efficiency. In addition, it can also facilitate loading and unloading.

[0049] In some embodiments, a guide block 22 is installed next to the discharge port 21, and the guide block 22 is used to push the product 6 on the glass turntable 1 to be aligned. The guide block 22 is provided with a vacuum adsorption hole 23, and the vacuum adsorption hole 23 is used to adsorb the product 6 dropped from the discharge port 21. When the glass turntable 1 rotates, the product 6 is taken away from the vacuum adsorption hole 23 by the electrostatic field adsorption force.

[0050] After a number of products 6 fall from the discharge port 21 and before falling onto the glass turntable 1, the products 6 are adsorbed by the vacuum adsorption holes 23. Thereafter, when the glass turntable 1 rotates, the electrostatic field adsorption force is used to take the products 6 away from the vacuum adsorption holes 23, thereby adjusting the postures of the products 6 into a uniform shape.

[0051] In some embodiments, the electrode 4 is a regional copper electrode 4 located at a certain position below the glass turntable 1. When the glass turntable 1 drives the product 6 to move, the product 6 passes over the regional copper electrode 4. The copper surface of the regional copper electrode 4 is gold-plated to increase the surface conductivity. When a high-voltage DC voltage is applied to the regional copper electrode 4, the glass surface is polarized, allowing the product 6 to be adsorbed on the glass through the electrostatic field force.

[0052] Since the regional copper electrode 4 is only located at a certain position below the glass turntable 1, the contact portion between the product 6 and the glass turntable 1 can be detected by simply moving the product 6 away from the regional copper electrode 4. In addition, since the copper surface of the regional copper electrode 4 is gold-plated, the surface conductivity is increased, so that the glass surface can be polarized by applying a high-voltage DC voltage to the electrode 4, so that when the product 6 is moved away from the regional copper electrode 4, the product 6 can still be better fixed on the glass turntable 1.

[0053] In some embodiments, the electrode 4 is an annular electrode 4 distributed around the bottom of the glass turntable 1. The annular electrode 4 is provided with a PET transparent electrode 41. After the product 6 is placed on the glass turntable 1, the product 6 is located above the annular electrode 4, so that the annular electrode 4 can provide an electrostatic field adsorption force for the contact portion between the glass turntable 1 and the product 6. The transmittance of the PET transparent electrode 41 is above 92%.

[0054] Since the light transmittance of the PET transparent electrode 41 reaches more than 92%, even if the product 6 is located above the PET transparent electrode 41, it does not affect the detection of the contact portion between the product 6 and the glass turntable 1. In addition, since the electrode 4 is a ring electrode 4, the ring electrode 4 can be distributed around the bottom of the glass turntable 1, so that the electrostatic field adsorption force can be uniformly provided to the glass turntable 1, so that the glass turntable 1 can drive the product 6 to move, and the product 6 can be fixed on the glass turntable 1 more stably.

[0055] In some embodiments, the surface resistance of the PET transparent electrode 41 is 1Ω / cm 2 The fixing seat 3 is made of glass fiber; so as to make the overall surface voltage consistent, it will not affect the functions of optical fiber and visual detection, and the electrostatic field force will not change significantly.

[0056] In some embodiments, the device for detecting appearance defects of micro-components further includes a power supply unit that inputs a 7kV DC voltage to the electrode 4, and the motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min; so that the electrode 4 can provide sufficient electrostatic field adsorption force to the glass turntable 1, and at the same time, when the glass turntable 1 drives the product 6 to move, the probability of the product 6 flying out of the glass turntable 1 can be further reduced.

[0057] In some embodiments, the surface roughness of the glass turntable 1 is 20-50 nm, corresponding to a light transmittance of the glass turntable 1 of 97-92%.

[0058] The visual system located at the inspection station can clearly photograph and inspect the contact portion between the product 6 and the glass turntable 1 , while minimizing the probability of the material flying off the glass turntable 1 .

[0059] In some embodiments, the surface roughness of the glass turntable 1 is 50 nm, corresponding to a light transmittance of the glass turntable 1 of 92%.

[0060] Since the surface roughness of the glass turntable is adjusted to 20-50nm, the transmittance of the glass turntable is also reduced to 97-92%. The visual system located at the inspection station can take pictures of the contact area between the product and the glass turntable for inspection. The product will not be unable to be clearly photographed due to the light transmittance of the glass turntable being only 97-92%. However, adjusting the surface roughness of the glass turntable to 20-50nm can effectively avoid the probability of materials flying out of the glass turntable.

[0061] In some embodiments, a device for detecting appearance defects of tiny components also includes a power module that drives the discharge port 21 to move horizontally above the glass turntable 1, so that a plurality of products 6 can be arranged in a circle on the glass turntable 1 through the discharge port 21. The power module also drives a suction nozzle that moves horizontally above the glass turntable 1, and the suction nozzle is used to suck the product 6 on the glass turntable 1.

[0062] Large batches of inspections are performed on the glass turntable 1, and at the same time, the inspection-completed and unqualified products 6 are taken out by using a suction nozzle, thereby further improving the inspection efficiency.

[0063] In some embodiments, when the glass turntable 1 is full of products 6, the detection station can detect the bottom surface of the product 6 through the electrode 4, detect the four sides of the product 6 by obliquely irradiating the product 6, and detect the top surface of the product 6. The glass turntable 1 is divided into several sectors 5 by the reflective strip 51. The fixed seat 3 is equipped with a light sensor, which is used to sense the return light refracted by the reflective strip 51 to achieve the positioning of the sector 5. The discharge port 21 is provided with a meter, which is used to count and number the products 6 falling into the glass turntable 1, so as to locate all the products 6 of the glass turntable 1 according to the positioning of the sector 5 and the numbering of the products 6 of the glass turntable 1.

[0064] Since the sectors 5 and the products 6 can be positioned, the suction nozzle can accurately find the unqualified products 6 and the products 6 that have completed the inspection, and absorb and take out these products 6. In addition, after the suction nozzle takes out the products 6, the discharge port 21 can replenish the products 6 at the corresponding position, thereby further improving the inspection efficiency and reducing the waste of equipment resources.

[0065] In order to further illustrate the device for detecting appearance defects of micro products 6 described in this specific embodiment, the following examples are listed. Example 1

[0066] like Figure 1 , 2 As shown in , 3, 8 and 9, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1 and a loading track 2.

[0067] The motor drives the glass turntable 1 to rotate, and the surface roughness of the glass turntable 1 is 20nm, corresponding to a light transmittance of 97% for the glass turntable 1. The periphery of the glass turntable 1 is provided with an inspection station for inspecting the appearance of the product 6.

[0068] The feeding track 2 is provided with a discharge port 21, and the feeding track 2 is tilted downward until the discharge port 21 is located on the glass turntable 1, and a plurality of products 6 can fall onto the glass turntable 1 through the discharge port 21. After the product 6 is placed on the glass turntable 1, the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection.

[0069] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0070] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. During this period, a number of products 6 can fall onto the glass turntable 1 through the discharge port 21. At this time, the products 6 will slide from the side of the guide port to achieve the correction of the products 6 on the glass turntable 1 and arrange them in a circular arrangement on the glass turntable 1. After that, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection.

[0071] According to statistics, when the glass turntable 1 drives product 6; when the product 6 is a bread-shaped material and its weight is 2.586g, and the detection efficiency is 12000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 1.75%; when the item is a conventional rectangular material and its weight is 0.259g, and the detection efficiency is 15000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 2.13%. Example 2

[0072] like Figure 1 , 2 As shown in , 3, 8 and 9, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1 and a loading track 2.

[0073] The motor drives the glass turntable 1 to rotate, and the surface roughness of the glass turntable 1 is 50nm, corresponding to a light transmittance of 92% for the glass turntable 1. The periphery of the glass turntable 1 is provided with an inspection station for inspecting the appearance of the product 6.

[0074] The feeding track 2 is provided with a discharge port 21, which is tilted downward to be located on the glass turntable 1. A plurality of products 6 can fall onto the glass turntable 1 through the discharge port 21, and a guide block 22 is installed next to the discharge port 21. After the product 6 is placed on the glass turntable 1, the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection.

[0075] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0076] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. During this period, a number of products 6 can fall onto the glass turntable 1 through the discharge port 21. At this time, the products 6 will slide from the side of the guide port to achieve the correction of the products 6 on the glass turntable 1 and arrange them in a circular arrangement on the glass turntable 1. After that, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection.

[0077] According to statistics, when the glass turntable 1 drives product 6; when the product 6 is a bread-shaped material and its weight is 2.586g, and the detection efficiency is 12000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.93%; when the item is a conventional rectangular material and its weight is 0.259g, and the detection efficiency is 15000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 1.25%. Example 3

[0078] like Figure 1 , 2 As shown in , 3, 8 and 9, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1, a fixing seat 3, a power supply unit and a loading track 2.

[0079] The motor drives the glass turntable 1 to rotate. The surface roughness of the glass turntable 1 is 20nm, and the corresponding light transmittance of the glass turntable 1 is 97%. The periphery of the glass turntable 1 is provided with an inspection station for the appearance inspection of the product 6. The fixing seat 3 is installed with an electrode 4 located below the glass turntable 1. The power supply unit is used to input a DC voltage to the electrode 4 so that the electrode 4 is used to provide an electrostatic field adsorption force to the glass turntable 1. The electrode 4 is a regional copper electrode 4 located at a certain position below the glass turntable 1. When the glass turntable 1 drives the product 6 to move, the product 6 passes above the regional copper electrode 4. The copper surface of the regional copper electrode 4 is gold-plated to increase the surface conductivity. When a high-voltage DC voltage is applied to the regional copper electrode 4, the glass surface is polarized, allowing the product 6 to be adsorbed on the glass through the electrostatic field force.

[0080] The feeding track 2 is provided with a discharge port 21, which is tilted downward to the discharge port 21 located on the glass turntable 1. A plurality of products 6 can fall onto the glass turntable 1 through the discharge port 21. A guide block 22 is installed next to the discharge port 21. The guide block 22 is provided with a vacuum adsorption hole 23. The vacuum adsorption hole 23 is used to adsorb the product 6 dropped from the discharge port 21. After the product 6 is placed on the glass turntable 1, the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection, and the product 6 passes over the electrode 4.

[0081] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0082] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. At the same time, the power supply unit is used to input a 7kV DC voltage to the electrode 4 to provide an electrostatic field adsorption force to the glass turntable 1. During this period, a number of products 6 can fall onto the glass turntable 1 through the discharge port 21. The vacuum adsorption hole 23 is used to adsorb the products 6 falling from the discharge port 21. When the glass turntable 1 rotates, the products 6 are taken away from the vacuum adsorption hole 23 by electrostatic field adsorption. When the products 6 move away from the vacuum hole, the products 6 will slide from the side of the guide port to realize the correction of the products 6 on the glass turntable 1 and arrange them on the glass turntable 1 in a circular arrangement. Thereafter, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection. When the glass turntable 1 drives the products 6 to move, the products 6 pass above the regional copper electrode 4. At this time, the electrostatic field adsorption force on the glass turntable 1 will fix the products 6.

[0083] According to statistics, when the glass turntable 1 drives product 6; when the product 6 is a bread-shaped material and its weight is 2.586g, and the detection efficiency is 12000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.41%; when the item is a conventional rectangular material and its weight is 0.259g, and the detection efficiency is 15000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.56%. Example 4

[0084] like Figure 1 , 2 As shown in , 3, 8 and 9, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1, a fixing seat 3, a power supply unit and a loading track 2.

[0085] The motor drives the glass turntable 1 to rotate. The surface roughness of the glass turntable 1 is 50nm, and the corresponding light transmittance of the glass turntable 1 is 92%. The periphery of the glass turntable 1 is provided with an inspection station for the appearance inspection of the product 6. The fixing seat 3 is installed with an electrode 4 located below the glass turntable 1. The power supply unit is used to input a DC voltage to the electrode 4 so that the electrode 4 is used to provide an electrostatic field adsorption force to the glass turntable 1. The electrode 4 is a regional copper electrode 4 located at a certain position below the glass turntable 1. When the glass turntable 1 drives the product 6 to move, the product 6 passes above the regional copper electrode 4. The copper surface of the regional copper electrode 4 is gold-plated to increase the surface conductivity. When a high-voltage DC voltage is applied to the regional copper electrode 4, the glass surface is polarized, allowing the product 6 to be adsorbed on the glass through the electrostatic field force.

[0086] The feeding track 2 is provided with a discharge port 21, which is tilted downward to the discharge port 21 located on the glass turntable 1. A plurality of products 6 can fall onto the glass turntable 1 through the discharge port 21. A guide block 22 is installed next to the discharge port 21. The guide block 22 is provided with a vacuum adsorption hole 23. The vacuum adsorption hole 23 is used to adsorb the product 6 dropped from the discharge port 21. After the product 6 is placed on the glass turntable 1, the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection, and the product 6 passes over the electrode 4.

[0087] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0088] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. At the same time, the power supply unit is used to input a 7kV DC voltage to the electrode 4 to provide an electrostatic field adsorption force to the glass turntable 1. During this period, a number of products 6 can fall onto the glass turntable 1 through the discharge port 21. The vacuum adsorption hole 23 is used to adsorb the products 6 falling from the discharge port 21. When the glass turntable 1 rotates, the products 6 are taken away from the vacuum adsorption hole 23 by electrostatic field adsorption. When the products 6 move away from the vacuum hole, the products 6 will slide from the side of the guide port to realize the correction of the products 6 on the glass turntable 1 and arrange them on the glass turntable 1 in a circular arrangement. Thereafter, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection. When the glass turntable 1 drives the products 6 to move, the products 6 pass above the regional copper electrode 4. At this time, the electrostatic field adsorption force on the glass turntable 1 will fix the products 6.

[0089] According to statistics, when the glass turntable 1 drives product 6; when the product 6 is a bread-shaped material and its weight is 2.586g, and the detection efficiency is 12000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.27%; when the item is a conventional rectangular material and its weight is 0.259g, and the detection efficiency is 15000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.31%. Example 5

[0090] like Figures 4 to 9 As shown, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1, a fixing seat 3, a power supply unit and a feeding track 2.

[0091] The motor drives the glass turntable 1 to rotate. The surface roughness of the glass turntable 1 is 20nm, and the corresponding light transmittance of the glass turntable 1 is 97%. The periphery of the glass turntable 1 is provided with an inspection station for the appearance inspection of the product 6. The fixing seat 3 is installed with an electrode 4 located below the glass turntable 1. The power supply unit is used to input a DC voltage to the electrode 4 so that the electrode 4 is used to provide an electrostatic field adsorption force to the glass turntable 1. The electrode 4 is an annular electrode 4 distributed around the bottom of the glass turntable 1. The annular electrode 4 is provided with a PET transparent electrode 41. After the product 6 is placed on the glass turntable 1, the product 6 is located above the annular electrode 4, so that the annular electrode 4 can provide an electrostatic field adsorption force for the contact portion between the glass turntable 1 and the product 6. The light transmittance of the PET transparent electrode 41 is above 92%.

[0092] The feeding track 2 is provided with a discharge port 21, which is tilted downward until the discharge port 21 is located on the glass turntable 1. A plurality of products 6 can fall onto the glass turntable 1 through the discharge port 21. A guide block 22 is installed next to the discharge port 21. The guide block 22 is provided with a vacuum adsorption hole 23. The vacuum adsorption hole 23 is used to adsorb the product 6 dropped from the discharge port 21. After the product 6 is placed on the glass turntable 1, the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection, and the product 6 is located above the electrode 4.

[0093] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0094] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. At the same time, the power supply unit is used to input a 7kV DC voltage to the electrode 4 to provide an electrostatic field adsorption force to the glass turntable 1. During this period, a number of products 6 can fall onto the glass turntable 1 through the discharge port 21. The vacuum adsorption hole 23 is used to adsorb the products 6 falling from the discharge port 21. When the glass turntable 1 rotates, the products 6 are taken away from the vacuum adsorption hole 23 by electrostatic field adsorption. When the products 6 move away from the vacuum hole, the products 6 will slide from the side of the guide port to realize the correction of the products 6 on the glass turntable 1 and arrange them on the glass turntable 1 in a circular arrangement. Thereafter, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection. When the glass turntable 1 drives the products 6 to move, the products 6 are located above the electrode 4. At this time, the electrostatic field adsorption force on the glass turntable 1 will fix the products 6.

[0095] According to statistics, when the glass turntable 1 drives product 6; when the product 6 is a bread-like material and its weight is 2.586g, and the detection efficiency is 12000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.25%; when the item is a conventional rectangular material and its weight is 0.259g, and the detection efficiency is 15000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.28%. Example 6

[0096] like Figures 4 to 9 As shown, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1, a fixing seat 3, a power supply unit and a feeding track 2.

[0097] The motor drives the glass turntable 1 to rotate. The surface roughness of the glass turntable 1 is 50nm, and the corresponding light transmittance of the glass turntable 1 is 92%. The periphery of the glass turntable 1 is provided with an inspection station for the appearance inspection of the product 6. The fixing seat 3 is installed with an electrode 4 located below the glass turntable 1. The power supply unit is used to input a DC voltage to the electrode 4 so that the electrode 4 is used to provide an electrostatic field adsorption force to the glass turntable 1. The electrode 4 is an annular electrode 4 distributed around the bottom of the glass turntable 1. The annular electrode 4 is provided with a PET transparent electrode 41. After the product 6 is placed on the glass turntable 1, the product 6 is located above the annular electrode 4, so that the annular electrode 4 can provide an electrostatic field adsorption force for the contact portion between the glass turntable 1 and the product 6. The light transmittance of the PET transparent electrode 41 is above 92%.

[0098] The feeding track 2 is provided with a discharge port 21, which is tilted downward until the discharge port 21 is located on the glass turntable 1. A plurality of products 6 can fall onto the glass turntable 1 through the discharge port 21. A guide block 22 is installed next to the discharge port 21. The guide block 22 is provided with a vacuum adsorption hole 23. The vacuum adsorption hole 23 is used to adsorb the product 6 dropped from the discharge port 21. After the product 6 is placed on the glass turntable 1, the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection, and the product 6 is located above the electrode 4.

[0099] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0100] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. At the same time, the power supply unit is used to input a 7kV DC voltage to the electrode 4 to provide an electrostatic field adsorption force to the glass turntable 1. During this period, a number of products 6 can fall onto the glass turntable 1 through the discharge port 21. The vacuum adsorption hole 23 is used to adsorb the products 6 falling from the discharge port 21. When the glass turntable 1 rotates, the products 6 are taken away from the vacuum adsorption hole 23 by electrostatic field adsorption. When the products 6 move away from the vacuum hole, the products 6 will slide from the side of the guide port to realize the correction of the products 6 on the glass turntable 1 and arrange them on the glass turntable 1 in a circular arrangement. Thereafter, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection. When the glass turntable 1 drives the products 6 to move, the products 6 are located above the electrode 4. At this time, the electrostatic field adsorption force on the glass turntable 1 will fix the products 6.

[0101] According to statistics, when the glass turntable 1 drives product 6; when the product 6 is a bread-shaped material and its weight is 2.586g, and the detection efficiency is 12000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.03%; when the item is a conventional rectangular material and its weight is 0.259g, and the detection efficiency is 15000 (pcs / min), the probability of product 6 flying out of the glass turntable 1 is about 0.05%.

[0102] The following is a comparison table of the probability of the product 6 flying out of the glass turntable 1 when Examples 1 to 6 are working.

[0103] Example 7

[0104] like Figures 4 to 10 As shown, this embodiment provides a device for detecting appearance defects of tiny components, which includes a motor, a glass turntable 1, a fixing seat 3, a power supply unit, a loading track 2 and a power module.

[0105] The motor drives the glass turntable 1 to rotate. The surface roughness of the glass turntable 1 is 50nm, and the corresponding light transmittance of the glass turntable 1 is 92%. The glass turntable 1 is divided into several sectors 5 by the reflective strip 51. The fixing seat 3 is equipped with a light sensor, which is used to sense the light refracted back by the reflective strip 51 to achieve the positioning of the sector 5. The fixing seat 3 is equipped with an electrode 4 located below the glass turntable 1. The power supply unit is used to input a DC voltage to the electrode 4 so that the electrode 4 is used to provide an electrostatic field adsorption force to the glass turntable 1. The electrode 4 is an annular electrode 4 distributed around the bottom of the glass turntable 1. The annular electrode 4 is provided with a PET transparent electrode 41. After the product 6 is placed on the glass turntable 1, the product 6 is located above the annular electrode 4, so that the annular electrode 4 can provide an electrostatic field adsorption force for the part where the glass turntable 1 contacts the product 6. The light transmittance of the PET transparent electrode 41 is above 92%. The glass turntable 1 is surrounded by inspection stations for inspecting the appearance of the products 6. When the glass turntable 1 is full of products 6, the inspection stations can inspect the bottom surface of the products 6 through the electrodes 4, inspect the four sides of the products 6 by oblique illumination, and inspect the top surface of the products 6.

[0106] The loading track 2 is provided with a discharge port 21, which is inclined downward to the discharge port 21 located on the glass turntable 1. Several products 6 can fall onto the glass turntable 1 through the discharge port 21. The discharge port 21 is provided with a meter, which is used to count and number the products 6 falling into the glass turntable 1, so as to locate all the products 6 of the glass turntable 1 according to the positioning of the sector 5 and the numbering of the products 6 of the glass turntable 1. A guide block 22 is installed next to the discharge port 21, and the guide block 22 is provided with a vacuum adsorption hole 23, which is used to adsorb the products 6 falling from the discharge port 21. The power module is used to drive the discharge port 21 to move horizontally above the glass turntable 1, so that several products 6 can be arranged in a ring on the glass turntable 1 through the discharge port 21; the power module also drives a suction nozzle located above the glass turntable 1 to move horizontally, and the suction nozzle is used to absorb the products 6 on the glass turntable 1. After the product 6 is placed on the glass turntable 1 , the glass turntable 1 drives the product 6 to move to the inspection station for appearance inspection, and the product 6 is located above the electrode 4 .

[0107] The following is the working process of the device for detecting appearance defects of tiny products 6 described in this embodiment.

[0108] The motor is used to drive the glass turntable 1 to rotate at a speed of 160r / min. The light sensor senses the light refracted by the reflective strip 51 to achieve positioning of the sector 5. At the same time, the power supply unit is used to input a 7kV DC voltage to the electrode 4 to provide an electrostatic field adsorption force to the glass turntable 1.

[0109] During this period, several products 6 can fall onto the glass turntable 1 through the discharge port 21. The meter counts and numbers the products 6 falling from the discharge port 21, and determines which sector 5 of the glass turntable 1 the product 6 is located in based on the positioning of the sector 5 and the numbering of the products 6 on the glass turntable 1, so as to locate all the products 6. During the period when the product 6 falls from the discharge port 21, the vacuum adsorption hole 23 is used to adsorb the product 6 falling from the discharge port 21. When the glass turntable 1 rotates, the product 6 is taken away from the vacuum adsorption hole 23 by electrostatic field attraction. When the product 6 moves away from the vacuum hole, the product 6 will slide from the side of the guide port to realize the alignment of the product 6 on the glass turntable 1 and arrange it in a circular arrangement on the glass turntable 1. Thereafter, the glass turntable 1 drives the products 6 arranged thereon to move to the inspection station for appearance inspection. When the glass turntable 1 drives the product 6 to move, the product 6 is located above the electrode 4. At this time, the electrostatic field adsorption force on the glass turntable 1 will fix the product 6.

[0110] After the inspection of product 6 is completed, based on the positioning of product 6, the suction nozzle searches for unqualified products 6 and products 6 that have completed the inspection, and absorbs and takes out these products 6. In addition, after the suction nozzle takes out product 6, the discharge port 21 can replenish product 6 at the corresponding position.

Claims

1. A device for detecting appearance defects of micro components, characterized in that: The invention comprises a motor, a glass turntable (1), a loading track (2) and a fixing seat (3), wherein the motor drives the glass turntable (1) to rotate, the loading track (2) is provided with a discharge port (21), the loading track (2) is inclined downward until the discharge port (21) is located on the glass turntable (1), so that when the glass turntable (1) rotates, a plurality of products (6) can be arranged on the glass turntable (1) through the discharge port (21), and the periphery of the glass turntable (1) is provided with a detection station for performing an appearance detection on the products (6) The fixing seat (3) is provided with an electrode (4) located below the glass turntable (1), and the electrode (4) is used to provide an electrostatic field adsorption force to the glass turntable (1). When the product (6) is placed on the glass turntable (1) and the glass turntable (1) drives the product (6) to move, the product (6) is located above the electrode (4) or can pass above the electrode (4). The surface roughness of the glass turntable (1) is 20-50 nm, and the corresponding light transmittance of the glass turntable (1) is 97-92%; A material guide block (22) is installed beside the material discharge port (21), and the material guide block (22) is used to push the product (6) on the glass turntable (1) to be guided. The material guide block (22) is provided with a vacuum adsorption hole (23), and the vacuum adsorption hole (23) is used to adsorb the product (6) dropped from the material discharge port (21) onto the glass turntable (1). When the glass turntable (1) rotates, the product (6) is taken away from the vacuum adsorption hole (23) by the adsorption force of the electrostatic field. When the glass turntable (1) is filled with the products (6), the inspection station inspects the bottom surface of the products (6), inspects the four side surfaces of the products (6) by obliquely irradiating the products (6), and inspects the top surface of the products (6). The glass turntable (1) is divided into a plurality of sectors (5) by a reflective strip (51). The fixing seat (3) is equipped with a light sensor, which is used to sense the light reflected back by the reflective strip (51) to achieve the positioning of the sectors (5). The discharge port (21) is provided with a meter, which is used to count and number the products (6) falling into the glass turntable (1), so as to locate all the products (6) on the glass turntable (1) according to the positioning of the sectors (5) and the numbering of the products (6) on the glass turntable (1).

2. A device for detecting appearance defects of micro components according to claim 1, characterized in that: The electrode (4) is a regional copper electrode (4) located at a certain position below the glass turntable (1). When the glass turntable (1) drives the product (6) to move, the product (6) passes above the regional copper electrode (4). The copper surface of the regional copper electrode (4) is plated with gold to increase the surface conductivity. When a high-voltage direct current voltage is applied to the regional copper electrode (4), the glass surface is polarized, allowing the product (6) to be adsorbed on the glass through an electrostatic field force.

3. The device for detecting appearance defects of micro components according to claim 1, characterized in that: The electrode (4) is an annular electrode (4) distributed around the bottom of the glass turntable (1), and the annular electrode (4) is provided with a PET transparent electrode (41). After the product (6) is placed on the glass turntable (1), the product (6) is located above the annular electrode (4), so that the annular electrode (4) can provide an electrostatic field adsorption force for the contact portion of the glass turntable (1) and the product (6), and the light transmittance of the PET transparent electrode (41) is above 92%.

4. A device for detecting appearance defects of micro components according to claim 3, characterized in that: The surface resistance of the PET transparent electrode (41) is 1Ω / cm 2 The fixing seat (3) is made of glass fiber.

5. A device for detecting appearance defects of micro components according to claim 2 or 3, characterized in that: It also includes a power supply unit for inputting a 7 kV DC voltage to the electrode (4), and the motor is used to drive the glass turntable (1) to rotate at a speed of 160 r / min.

6. A device for detecting appearance defects of micro components according to claim 5, characterized in that: The surface roughness of the glass turntable (1) is 50 nm, corresponding to a light transmittance of the glass turntable (1) of 92%.

7. A device for detecting appearance defects of micro components according to claim 6, characterized in that: It also includes a power module for driving the discharge port (21) to move horizontally above the glass turntable (1), so that a plurality of the products (6) can be arranged in a circular shape on the glass turntable (1) through the discharge port (21); the power module also drives a suction nozzle located above the glass turntable (1) to move horizontally, and the suction nozzle is used to suck the products (6) on the glass turntable (1).

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