Chip mounter element polarity reinspection device and LED chip mounter

Abstract

The utility model provides a chip mounter element polarity reinspection device and an LED chip mounter, the chip mounter element polarity reinspection device comprises a rack, a feeding plate installed on the rack, a reinspection camera device arranged on the rack, a reinspection light source device used for providing reinspection light, and a reinspection reflection device, compared with the prior art, the scheme has the advantages that the detection yield is remarkably improved, the debugging strength of the reinspection equipment is greatly reduced, and the reinspection camera does not adopt a detection mode of vertically irradiating the detected element, so that double detection on the top surface and the side surface of the detected LED element is realized, the detection efficiency and the detection precision are improved, and the detection cost is reduced. And moreover, the equipment arrangement space is saved, and the technical level of the whole chip mounting equipment is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED patch component detection, in particular to a device for identifying and re-inspecting component polarity in an LED component feeding device. Background Art

[0002] For LED SMT equipment that feeds in bulk, the identification, detection and processing of the polarity of the materials to be mounted (generally LED components, such as LED lamp beads, but also other similar tiny electronic components such as resistors and capacitors) during the feeding process is an extremely important link. This is not only related to the mounting efficiency of the SMT equipment, but also directly affects the yield level of the SMT equipment's mounting operation.

[0003] The applicant has been focusing on the field of bulk placement technology of micro-electronic components, and has been striving for continuous improvement in this sub-segment. The present application is an improvement and innovation based on the previous research and development scheme of the same applicant. The patent application number of the previous technical scheme is 202311494294.3, and the application publication number is CN 117518040A. The present application is in line with the previous technical scheme in terms of technological evolution, and the disclosed content certainly also includes the content disclosed in the above-mentioned patent application, which is cited in this application document but will not be repeated.

[0004] For the LED components (which may refer to electronic components suitable for patching in this article) that have been delivered to the feeding board during the loading process of the patch equipment, the above-mentioned prior patent application uses an optical fiber device to use the comparison result after the light flux is digitized to determine the polarity of the lamp beads, so as to detect the polarity of the lamp beads located on the feeding board, and remove the lamp beads that do not meet the requirements of the correct polarity direction that are missed in the upstream process detection from the feeding board or perform subsequent rotation adjustment operations on the LED components. However, with the development of technology and the continuous enrichment of market demand, the mounted components are gradually becoming miniaturized (the size of the corner of the lamp beads used for detection will become smaller) and massive, and the accuracy of light irradiation is very high, which requires the working position accuracy and calibration accuracy of the corresponding optical fiber device on the patch equipment to be very high, which leads to high requirements on the operating level of the operator, and also leads to reduced efficiency in the use and maintenance of the equipment and increased production costs, and causes the detection stability of the detection equipment to be weak. Although the prior application scheme improves the yield rate of the detected products, its yield level still needs to be further improved.

[0005] Therefore, under the guidance of the R&D idea of ​​endless technological advancement, further solution improvement or innovation is imperative. Utility Model Content

[0006] In order to solve the above-mentioned problems in the prior art of polarity detection in the loading stage of the micro-small loose LED component mounting process, the utility model provides a device for polarity re-inspection of mounting machine components, the device comprising a stand, a feeding plate for conveying the LED components to be inspected, a re-inspection camera device and a re-inspection light source device for providing re-inspection light, and also comprising a re-inspection reflection device. The re-inspection light source device can perform common imaging in the re-inspection camera device by directly irradiating the top surface of the LED component and simultaneously irradiating the side surface of the LED component using the re-inspection reflection device 5.

[0007] The positional relationship of the above-mentioned components should be such that the reflected light from the re-inspection light source device after irradiating the top surface of the inspected LED element can be incident on the re-inspection camera device, and the reflected light from the re-inspection light source device after irradiating the re-inspection reflection device can be incident on the side of the inspected LED element, and finally the light reflected from the side of the LED element can be incident on the re-inspection camera device. The joint imaging is to simultaneously image the top and side surfaces of the LED element for polarity detection.

[0008] The feeding plate is provided with a row of feeding slots for placing the LED components, and the number of the feeding slots can be freely set according to actual working conditions.

[0009] Furthermore, the re-inspection reflection device includes a reflection mirror surface and a reflection bracket for supporting the reflection mirror surface. The reflection mirror surface is a single-sided mirror. Since the single-sided mirror only performs surface mirror reflection, there will be no refraction during the process, which improves the reflection efficiency and display effect of light.

[0010] Furthermore, the re-inspection light source device includes a light source fixing seat, a light blocking block arranged on the light source fixing seat, a discharge block adjustably mounted on the light source fixing seat, and a light source generator mounted on the discharge block, wherein the light blocking block is located between the light source generator and the feed plate, and a light-transmitting notch is provided on the light blocking block, and the light emitted by the light source generator can directly irradiate the LED element located on the feed plate through the light-transmitting notch. The light-transmitting notch is a light-transmitting hole, and its shape can be selected as holes or gaps of various shapes according to actual conditions.

[0011] Furthermore, the re-inspection camera device includes a camera, a lens arranged at the end of the camera, a prism connected to the lens, a locking block and a connecting block, the connecting block is adjustably arranged on the stand, and the locking block adjustably connects the lens to the connecting block.

[0012] Generally speaking, the camera is provided with a network cable interface and a power cable interface, wherein the power cable interface is used to connect the camera to a power source, and the network cable interface is used to connect the camera to a processor.

[0013] Preferably, the prism includes a prism body, a reflective sheet disposed in the prism body, and a prism dust cover disposed in the incident light direction of the prism.

[0014] More preferably, the side of the reflective sheet facing the lens is a single-sided mirror to improve reflection efficiency and reflection effect.

[0015] The utility model also provides an LED chip mounter, which comprises the chip mounter component polarity re-inspection device as described above.

[0016] The method for rechecking the polarity of LED components by using the component polarity rechecking device of the chip mounter comprises the following steps:

[0017] Step 1: transport the LED components that have been identified and selected for the front and back directions to the feeding plate;

[0018] Step 2, adjusting the re-inspection light source device to perform non-vertical illumination on the top surface of the LED component placed on the feeding plate, and irradiating the re-inspection reflective device at the same time;

[0019] Step 3, adjusting the re-inspection camera device so that the reflected light on the top surface of the LED element is incident on the re-inspection camera device, and also adjusting the re-inspection reflection device so that the light irradiated by the re-inspection light source device is reflected on the side surface of the LED element, and then making the light reflected from the side surface of the LED element incident on the re-inspection camera device;

[0020] Step 4, after the re-inspection camera device simultaneously receives the reflected light from the top surface of the LED component and the side surface of the LED component, it transmits the imaging data of the top surface of the LED component and the side surface of the LED component to a processor, which may be a computer;

[0021] Step 5, the processor compares and analyzes the imaging data of the top surface and the side surface of the LED component with a pre-stored standard image to determine whether the polarity direction of the LED component is correct, and the pre-stored standard image is a clear image of the standard LED component with the correct polarity direction;

[0022] Step 6: If the polarity direction of the LED component is correct, the feeding plate is driven to feed normally, and the polarity direction re-inspection test of the next LED component is continued; if the polarity direction of the LED component is incorrect, the LED component is removed and the next LED component is supplemented to be fed for polarity direction re-inspection test, or the LED component is subsequently rotated and adjusted, and then the feeding plate is driven to feed normally, and the polarity direction re-inspection test of the next LED component is continued;

[0023] Step seven, driving the feeding plate to transport the LED components that have completed polarity re-inspection to the next station for LED component mounting.

[0024] In the step two, the re-inspection light source device is adjusted so that the incident angle range of the light irradiating the top surface of the LED element is within the angle range of 40 degrees to 70 degrees, so that the re-inspection camera device in step four can simultaneously receive the reflected light from the top surface of the LED element and the side surface of the LED element. Finally, when the processor compares, it can compare the image of the top surface of the LED element and the image of the side surface of the LED element, which is equivalent to double detection, thereby improving the detection accuracy and detection efficiency.

[0025] The technical solution of the polarity re-inspection device and re-inspection method of the above-mentioned SMT component provided by the utility model significantly improves the detection yield rate compared with the prior art, and the debugging intensity of the re-inspection equipment is greatly reduced. Since the re-inspection camera does not adopt the detection method of vertically irradiating the detected component, it not only realizes the double detection of the top and side surfaces of the detected LED component, improves the detection efficiency and detection accuracy, but also saves equipment layout space, further improving the technical level of the entire SMT equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 It is a three-dimensional structural schematic diagram of another angle of the embodiment of the utility model;

[0029] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0030] Figure 5 A detection image of an embodiment of the utility model;

[0031] Figure 6 This is a detection image when the light blocking block is not installed in the embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the technical concept and technical solution of the utility model, the embodiments of the utility model will be briefly described below in conjunction with the accompanying drawings. Obviously, the description of the embodiments and the accompanying drawings is only for illustrating the technical solution of the utility model. On the premise that ordinary technicians in this field can understand, the protection scope of the utility model is not limited to the embodiments and the accompanying drawings.

[0033] like Figure 1-4 As shown, a polarity re-inspection device for components of a placement machine is a part of the placement machine equipment, comprising a stand 1, a feed plate 2 installed on the stand 1, a re-inspection camera device 3 arranged on the stand 1 and a re-inspection light source device 4 for providing re-inspection light, and also comprising a re-inspection reflection device 5. The structural position relationship of the above-mentioned components can make the reflected light after the light emitted from the re-inspection light source device 4 irradiates the top surface of the inspected LED component 6 to be incident on the re-inspection camera device 3, and at the same time can make the reflected light after the light emitted from the re-inspection light source device 4 irradiates the re-inspection reflection device 5 to irradiate the side of the inspected LED component 6, and finally the light reflected from the side of the LED component 6 can be incident on the re-inspection camera device 3.

[0034] The stand 1 is a supporting device for the feeding plate 2, the re-inspection camera device 3 and the re-inspection reflection device, and can also be a supporting device for the re-inspection light source device 4. Its structure is not limited to the following. Figure 1 , 3 Design shown.

[0035] The feeding plate 2 is provided with a feeding slot 21 for placing the LED elements 6 (ie, “lamp beads”) to be detected, and the feeding slots 21 are arranged in a row in plurality.

[0036] The re-inspection camera device 3 includes a camera 31, a lens 32 disposed at the end of the camera 31, a prism 33 connected to the lens 32, a locking block 34 and a connecting block 35, wherein the connecting block 35 is adjustably disposed on the stand 1, and the locking block 34 adjustably connects the lens 32 to the connecting block 35. The camera 31 is provided with a network cable interface and a power cable interface, wherein the power cable interface is used to connect the camera 31 to a power source, and the network cable interface is used to connect the camera 31 to a processor (not shown). The position of the prism 33 receiving the incident light can be adjusted by adjusting the connecting block 35 and the locking block 34. Here, the irradiation direction of the light incident from the prism 33 through the lens 32 into the camera 31 is referred to as the optical axis direction.

[0037] The prism 33 includes a prism body 331, a reflective sheet 332 arranged in the prism body 331, and a prism dust cover 333 arranged in the incident light direction of the prism 33. The side of the reflective sheet 332 facing the lens 32 is a one-way mirror, that is, the outermost layer of the reflective sheet 332 is a mirror surface, so that the incident light cannot be incident into the thickness layer of the reflective sheet 332, so no refraction will occur between the incident and reflected light, thereby improving the detection accuracy of the re-inspection camera. The prism dust cover 333 is made of quartz glass or other transparent materials.

[0038] The re-inspection light source device 4 includes a light source fixing seat 41, a light blocking block 42 arranged on the light source fixing seat 41, a discharge block 43 adjustably mounted on the light source fixing seat 41, and a light source generator 44 mounted on the discharge block 43. The light blocking block 42 is located between the light source generator 44 and the feed plate 2. A light-transmitting notch 421 is provided on the light blocking block 42. The light emitted by the light source generator 44 can pass through the light-transmitting notch 421 and directly illuminate the LED element 6 to be tested located on the feed plate 2, while the remaining light is blocked by the light blocking block 42. In this way, the interference of excess light can be eliminated as much as possible, so that the light reflected from the LED element 6 to be tested can be more clearly imaged in the re-inspection camera device 3, thereby improving the accuracy of the re-inspection. Figure 6 As shown in FIG. 1 , the detection image is obtained when the light blocking block 42 is not installed in this embodiment. Due to the interference of the surrounding light, part of the image is blurred. Figure 5 As shown, this is the detection image obtained when the stopper 42 is installed in this embodiment. In comparison, the effect is obvious.

[0039] The light-transmitting notch 421 can be a light-transmitting slit or a light-transmitting hole, and the shape of the notch can be selected as required. The discharge block 43 is provided with a blowing port facing the discharge trough 21, and the blowing port is used to blow away the LED components whose detected polarity does not meet the requirements from the feeding plate 2.

[0040] The re-inspection reflection device 5 includes a reflection mirror 51 and a reflection bracket 52 for supporting the reflection mirror 51. The reflection mirror 51 is arranged between the feeding plate 2 and the prism 33, and can receive the light from the re-inspection light source device 4, and reflect the light to the side of the LED component 6 under test, and then the side of the LED component 6 under test reflects the light to the re-inspection camera device 3, so that the re-inspection camera device 3 not only collects the imaging information of the top surface of the LED component 6 under test, but also can collect the side imaging information of the LED component 6 under test at the same time, thus realizing the dual detection function and doubling the detection accuracy, that is, not only can the polarity direction be identified by comparing the direction of the missing corner in the imaging of the top surface of the LED component 6 under test, but also the polarity direction can be determined by comparing whether there are pins on the side of the LED component 6 under test, which is equivalent to double insurance for the accuracy of polarity detection.

[0041] As attached Figure 5 As shown, it is the imaging effect of a certain detection in this embodiment. From the picture, it can be clearly shown that the large square highlighted part on the lower side is the image of the top surface of the LED component under test, and the position of the missing corner is very clear. Two bright parts can be clearly seen on the upper side of the picture, which form a sharp contrast with the surrounding darkness. It is the side image of the LED component under test, and the two bright parts are the images of the two pins of the LED component.

[0042] Obviously, in order to improve the detection accuracy, the reflective mirror surface 51 may also be a single-sided mirror.

[0043] The utility model also provides an LED placement machine, which includes the placement machine component polarity re-inspection device as described above. The process or method of re-inspecting the polarity of LED components in actual work includes the following steps:

[0044] Step 1: convey the LED components 6 that have been identified and selected in terms of the front and back directions to the feeding plate 2 and place them in the feeding trough 21;

[0045] Step 2, adjusting the re-inspection light source device 4 to illuminate the top surface of the LED element 6 placed on the feeding plate 2, and irradiating the re-inspection reflection device 5 at the same time;

[0046] Step 3: adjust the re-inspection camera device 3 so that the reflected light on the top surface of the LED element 6 is incident on the re-inspection camera device 3, and also adjust the re-inspection reflection device 5 so that the light irradiated by the re-inspection light source device 4 is reflected on the side surface of the LED element 6 (i.e., one side of the LED element circumference), and then make the light reflected from the side surface of the LED element 6 incident on the re-inspection camera device 3;

[0047] Step 4, the re-inspection camera device 3 simultaneously receives the reflected light from the top surface of the LED element 6 and the side surface of the LED element 6 and transmits the imaging data of the top surface of the LED element 6 and the side surface of the LED element 6 to the processor;

[0048] Step 5, the processor compares and analyzes the imaging data of the top surface and the side surface of the LED element 6 with the pre-stored standard image to determine whether the polarity direction of the LED element 6 is correct;

[0049] Step 6: If the polarity direction of the LED component 6 is correct, the feeding plate 2 is driven to feed normally, and the polarity direction re-inspection test of the next LED component is continued; if the polarity direction of the LED component 6 is incorrect, the LED component 6 is removed and the next LED component is supplemented for polarity direction re-inspection test, or the LED component 6 is subsequently rotated and adjusted to make its polarity direction correct, and then the feeding plate 2 is driven to feed normally, and the polarity direction re-inspection test of the next LED component is continued;

[0050] Step seven, driving the feeding plate 2 to transport the LED component 6 that has completed the polarity re-inspection to the next station for LED component mounting operation.

[0051] In the step 2, the re-inspection light source device 4 is adjusted so that the incident angle range of the light irradiating the top surface of the LED element 6 is within the angle range of 40 degrees to 75 degrees, and the angle adopted in this embodiment is 60 degrees. After actual testing, the angle of the incident angle within the above range can ensure the clarity of the image while also taking into account the reasonable configuration of the space occupied by the equipment. It should be noted that although the vertical illumination method is the most effective for the clarity of the image, the technical solution of the present application requires that two mutually perpendicular surfaces (top surface and side surface) must be imaged at the same time. Therefore, if vertical illumination is adopted, it is not conducive to achieving the technical effect of the technical solution of the present application.

[0052] The re-inspection reflection device 5 is called a "lamp foot reflector" or "pin reflector", which is used to reflect the reflected light from the side of the LED element 6 to be tested. If the side to be tested is provided with a lamp foot or a pin, strong light will be reflected from the lamp foot to the re-inspection camera device 3, which will be reflected in the final image as a brighter area in the shape of the lamp foot. If the side to be tested is a side without a lamp foot, the reflected light will be much darker, which will be reflected in the final image as a dark area with uniform brightness. The polarity direction of the LED element 6 can also be determined based on whether there is a pin on the side. Adding this side detection will directly lead to an increase in the detection yield.

[0053] The above embodiments are only used to illustrate the technical solution of the present utility model and should not be considered as limiting the protection scope of the present utility model.

Claims

1. A component polarity re-inspection device for a chip mounter, comprising a stand, a feeding plate for conveying LED components to be inspected, a re-inspection camera device and a re-inspection light source device for providing re-inspection light, characterized in that: It also includes a re-inspection reflection device, and the re-inspection light source device can perform common imaging in the re-inspection camera device by directly irradiating the top surface of the LED element and simultaneously irradiating the side surface of the LED element using the re-inspection reflection device.

2. The component polarity recheck device of the chip mounter according to claim 1, characterized in that: The feeding plate is provided with a row of placing slots for placing the LED components.

3. The component polarity rechecking device of the chip mounter according to claim 2, characterized in that: The re-inspection reflection device comprises a reflection mirror surface and a reflection bracket for supporting the reflection mirror surface, and the reflection mirror surface is a single-sided mirror.

4. The component polarity rechecking device for a chip mounter according to claim 1, characterized in that: The re-inspection light source device includes a light source fixing seat, a light blocking block arranged on the light source fixing seat, a discharge block adjustably installed on the light source fixing seat, and a light source generator installed on the discharge block, wherein the light blocking block is located between the light source generator and the feed plate, and a light-transmitting notch is provided on the light blocking block, and the light emitted by the light source generator can pass through the light-transmitting notch and directly irradiate the LED element located on the feed plate.

5. The component polarity rechecking device for a chip mounter according to claim 4, characterized in that: The light-transmitting notch is a light-transmitting hole.

6. The component polarity rechecking device for a chip mounter according to claim 4, characterized in that: The re-inspection camera device includes a camera, a lens arranged at the end of the camera, a prism connected to the lens, a locking block and a connecting block. The connecting block is adjustably arranged on the stand, and the locking block adjustably connects the lens to the connecting block.

7. The component polarity rechecking device for a chip mounter according to claim 6, characterized in that: The camera is provided with a network cable interface and a power cable interface, wherein the power cable interface is used to connect the camera to a power source, and the network cable interface is used to connect the camera to a processor.

8. The component polarity re-inspection device for a chip mounter according to claim 7, characterized in that: The prism comprises a prism body, a reflective sheet arranged in the prism body, and a prism dust cover arranged in the incident light direction of the prism.

9. The component polarity rechecking device for a chip mounter according to claim 8, characterized in that: The side of the reflective sheet facing the lens is a single-sided mirror.

10. An LED placement machine, characterized in that: It comprises a polarity recheck device for components of a chip placement machine as described in any one of claims 1 to 9.

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