An attaching device and an attaching detection method

Abstract

The present invention provides an attaching device and an attaching detection method, which relate to the bonding technology field. By arranging a first attaching unit and a second attaching unit face to face, they can jointly perform an attaching action on an attaching platform or select one of them to perform the attaching action. When one of them is selected for attaching, the other side selects to change materials, so that high-speed attaching and uninterrupted attaching can be realized, and the attaching efficiency can be improved. For the first attaching area where the attaching is completed, image detection is performed. A first detection frame, a second detection frame, and a third detection frame are drawn in the first attaching area to determine whether the ACF in the first attaching area is excessively attached short and obliquely attached. If so, it can be further determined whether it is the first detection frame, the second detection frame, or the third detection frame, and the specific position and reason can be judged. When it is qualified, by drawing a fourth detection frame and a fifth detection frame on the left and right sides of the first attaching area, it can be determined whether the ACF is excessively attached long.

Description

Technical Field

[0001] This application relates to the field of bonding technology, and particularly to an attaching device and an attaching detection method. Background Art

[0002] In the field of LED liquid crystal panel display manufacturing, an FOB bonder is a production device used to establish a stable mechanical and electrical connection between a printed circuit board (PCB) and a flexible printed circuit (FPC). It uses technologies such as machine vision alignment and precise motion control, and through anisotropic conductive film (ACF) bonding, realizes the electrical and mechanical connection of the fine-pitch PCB and FPC under certain hot pressing conditions. Before bonding the PCB and FPC, the PFC and the glass substrate are connected as a whole; during bonding, the glass substrate and part of the PCB are adsorbed and fixed, and the exposed part of the PCB is made to correspond vertically to the PPC, and the lower press head and the upper press head cooperate to complete the bonding.

[0003] Currently, the demand for ultra-large-size glass panels is increasing continuously. When bonding a relatively large-size glass panel, first attach the FPC to the PCB through ACF on the PCB, and then perform hot pressing bonding between the attached PCB and the glass panel. Since the size of the PCB becomes longer as the size of the glass panel increases, the attaching area of the ACF also becomes longer, and according to the process requirements, there may also be a possibility of multi-segment ACF attachment.

[0004] However, currently, for the case where the ACF attaching area is large, it is impossible to achieve high-speed ACF attachment and continuous ACF attachment work. At the same time, after the ACF attachment is completed, it is impossible to effectively and highly accurately detect whether the ACF is attached too long or too short, nor can it determine the specific position where the attachment is unqualified and the cause of the poor attachment for the unqualified attachment result. Summary of the Invention

[0005] The present invention proposes an attaching device and an attaching detection method to solve the technical problems in the prior art that it is impossible to achieve high-speed ACF attachment and continuous ACF attachment work, and at the same time, after the ACF attachment is completed, it is impossible to effectively and highly accurately detect whether the ACF is attached too long or too short, and to determine the specific position where the attachment is unqualified and the cause of the poor attachment for the unqualified attachment result.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] The present invention provides an attaching device, which includes a bracket. On the bracket, there are a first attaching unit and a second attaching unit for attaching ACF, and an attaching platform for carrying a PCB. The attaching platform is located below the first attaching unit and the second attaching unit. Either the first attaching unit or the second attaching unit, or both of them, perform the action of attaching ACF. Between the first attaching unit and the second attaching unit, there are a first detecting unit and a second detecting unit. Either the first detecting unit or the second detecting unit, or both of them, act to collect images of the ACF attaching area of the PCB located on the attaching platform.

[0008] Further, the first attaching unit includes a pressing head assembly. The pressing head assembly includes a pressing head body. The pressing head body includes a protection area. The protection area includes a silica gel sheath wrapped around the bottom of the pressing head body and a shrapnel. The upper end of the shrapnel is fixed to the pressing head body, and the lower end of the shrapnel presses the silica gel sheath.

[0009] Further, on both sides of the pressing head body, there are fixed limit blocks that simultaneously contact the pressing head body and the silica gel sheath. Above the pressing head body, there is a pressing head seat for conducting heat. On both sides of the pressing head seat, there are pressing head limit blocks that simultaneously contact the pressing head seat and the pressing head body. Above the pressing head seat, there is a heat insulation plate.

[0010] Further, above the heat insulation plate, there is a first horizontal adjusting member. In the middle of the first horizontal adjusting member, there is a groove. Inside the groove, there is a horizontal adjusting block. The center of the horizontal adjusting block is embedded with a first central axis. The horizontal adjusting block and the front of the first horizontal adjusting member are fixedly connected by a first screw. Around the horizontal adjusting block, there are a plurality of first jackscrews. In front of the first horizontal adjusting member, there is an adjusting block that is fixed to the first horizontal adjusting member and the pressing head seat.

[0011] Further, above the first horizontal adjusting member, there is a second horizontal adjusting member. On the left and right sides of the second horizontal adjusting member, there are third horizontal adjusting members. The second horizontal adjusting member and the third horizontal adjusting members pass through a second central axis from the horizontal center. Above and below the second central axis, there are second screws. On the second horizontal adjusting member, there are a plurality of second jackscrews.

[0012] Further, above the pressing head assembly, there is a tray assembly for installing an ACF tray. Between the tray assembly and the pressing head assembly, the ACF is conveyed through a conveying assembly.

[0013] Further, the tray assembly includes a glue tray. A rotating shaft is provided at the center of the glue tray. The rotating shaft is connected to a motor. A rotating plate is also fixed on the rotating shaft. One side of the rotating plate is adjacent to the conveying assembly, and a gravity block is fixed on the other side of the rotating plate. On the tray of the tray assembly, a sensing member and a limiting member are provided adjacent to the side where the gravity block on the rotating plate is located. An induction sheet is also fixed on the rotating plate. The sensing member includes an upper sensing member and a lower sensing member. The rotating plate drives the induction sheet to move between the upper sensing member and the lower sensing member.

[0014] Further, when the upper sensing member senses the induction sheet, the motor starts. When the lower sensing member senses the induction sheet, it checks whether the ACF on the glue tray is used up. The conveying assembly includes a plurality of ACF winding wheels. The rotating plate includes a plurality of adjustment holes. At least one ACF winding wheel is fixed in the adjustment hole.

[0015] In addition, the present application also discloses an attaching detection method, including the following steps:

[0016] a. Place the PCB on the attaching platform. The ACF on the tray assembly is conveyed to below the pressing head assembly through the conveying assembly. The pressing head assembly presses down to attach the ACF to the attaching area of the PCB. The first detection unit and the second detection unit take pictures of the PCB to obtain a first image and a second image.

[0017] b. The first image includes a first attaching area. In the first attaching area, the gray value of the area where the ACF is attached is higher than the area where the ACF is not successfully attached. Divide the first attaching area from left to right into a first detection frame, a second detection frame, and a third detection frame. Calculate the area ratio of the gray value areas in the first detection frame, the second detection frame, and the third detection frame respectively. If the ratio is higher than the preset ratio, it is determined that the first qualification of the ACF attachment on the PCB is qualified; otherwise, it is unqualified and a material throwing action is performed.

[0018] c. Divide a fourth detection frame and a fifth detection frame on the left and right sides of the first attaching area that is qualified for the first time. Calculate the ratio of the area of the gray value in the fourth detection frame and the fifth detection frame to the total area of the fourth detection frame and the fifth detection frame respectively. If the ratio is lower than the ratio set by default, it is determined that the second qualification of the ACF attachment on the PCB is qualified; otherwise, it is unqualified and a material throwing action is performed.

[0019] Further, the maximum upper and lower widths of the first detection frame, the second detection frame, and the third detection frame are equal to the width of the finally qualified first attaching area. The left side of the first detection frame and the right side of the third detection frame coincide with the left and right sides of the finally qualified first attaching area respectively.

[0020] Further, the first detection frame, the second detection frame, and the third detection frame have the same length and width, equal areas, and are separated from each other between the first detection frame and the second detection frame and between the second detection frame and the third detection frame.

[0021] Further, the maximum vertical width of the fourth detection frame and the fifth detection frame is equal to the width of the length of the finally qualified first attachment area, and the right side of the fourth detection frame and the left side of the fifth detection frame respectively coincide with the left and right sides of the finally qualified first attachment area.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides an attachment device and an attachment detection method. By arranging the first attachment unit and the second attachment unit face to face, they can perform joint attachment or select one of them to perform the attachment action on the attachment platform. When one of them is selected for attachment, the other side performs ACF material change. Alternate operations can achieve high-speed attachment and uninterrupted attachment, improving the attachment efficiency; by using the first detection unit and the second detection unit to take pictures of the attached PCB, obtaining the first image and the second image, and selecting the corresponding first attachment area for image detection, drawing the first detection frame, the second detection frame, and the third detection frame in the first attachment area, and judging whether the ACF in the first attachment area is overly attached short or tilted. If so, it can be further judged whether it is the first detection frame, the second detection frame, or the third detection frame to determine the specific position and reason; when it is qualified, by drawing the fourth detection frame and the fifth detection frame on the left and right sides of the first attachment area, it is judged whether the ACF is overly attached long, thereby realizing automatic ACF attachment quality detection and improving the attachment consistency and the yield rate. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions proposed by the present invention, the following will be described in detail in conjunction with the embodiments and the drawings. It should be understood that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can make changes to these drawings under the concept of the present invention.

[0025] Figure 1 Is a perspective view of an embodiment of the attachment device provided by the present invention;

[0026] Figure 2 Is a perspective view of an embodiment of the first attachment unit provided by the present invention;

[0027] Figure 3 Is a perspective view of an embodiment of the tray assembly provided by the present invention;

[0028] Figure 4 Is a partially enlarged perspective view of the press head assembly provided by the present invention;

[0029] Figure 5 Is another perspective partially enlarged perspective view of the press head assembly provided by the present invention;

[0030] Figure 6Schematic diagrams of the first detection frame, second detection frame, and third detection frame of the first image in the embodiments of the present invention;

[0031] Figure 7 Schematic diagrams of the fourth detection frame and fifth detection frame in the first image in the embodiments of the present invention.

[0032] 1. Bracket; 2. First attachment unit; 21. Tray assembly; 211. Motor; 212. Glue tray; 213. Rotating shaft; 214. Gravity block; 215. Rotating plate; 2151. Adjusting hole; 216. Upper sensor; 217. Lower sensor; 218. Induction sheet; 219. Upper limit member; 22. Conveying assembly; 221. First ACF winding wheel; 222. Second ACF winding wheel; 23. Press head assembly; 230. Adjusting block; 231. Press head body; 232. Silicone sheath; 233. Elastic sheet; 234. Limit block; 235. Press head seat; 236. Press head limit block; 237. Heat insulation plate; 238. First horizontal adjusting member; 2381. First set screw; 2382. Horizontal adjusting block; 2383. First central axis; 2384. First screw; 239. Second horizontal adjusting member; 2391. Third horizontal adjusting member; 2392. Second central axis; 2393. Second screw; 2394. Second set screw; 3. Second attachment unit; 4. Attachment platform; 5. First detection unit; 51. First attachment area; 511. First detection frame; 512. Second detection frame; 513. Third detection frame; 514. Fourth detection frame; 515. Fifth detection frame; 6. Second detection unit. Detailed implementation manners

[0033] Please refer to Figure 1 , in this embodiment, the present invention provides an attachment device, including a bracket 1. A first attachment unit 2 and a second attachment unit 3 for attaching ACF are provided on the bracket 1. The first attachment unit 2 and the second attachment unit 3 are arranged face to face with each other. An attachment platform 4 for carrying a PCB is provided below the first attachment unit 2 and the second attachment unit 3. The first attachment unit 2 and the second attachment unit 3 jointly perform an attachment action on the attachment platform 4. According to the attachment requirements, the first attachment unit 2 and the second attachment unit 3 perform the attachment action simultaneously to improve the attachment efficiency, or select the first attachment unit 2 or the second attachment unit 3 to perform the attachment action. At this time, without interruption, the paused first attachment unit 2 or second attachment unit 3 can perform actions such as material change or maintenance; a first detection unit 5 and a second detection unit 6 are also provided on the bracket 1. The first detection unit 5 and the second detection unit 6 are arranged between the first attachment unit 2 and the second attachment unit 3. The first detection unit 5 detects the attachment effect of the first attachment unit 2, and the second detection unit 6 detects the attachment effect of the second attachment unit 3.

[0034] Please refer toFigure 2 , Figure 4 , in this embodiment, the first attaching unit 2 includes a pressing head assembly 23. Above the pressing head assembly 23, there is a tray assembly 21 for mounting an ACF tray. The ACF is transferred between the tray assembly 21 and the pressing head assembly 23 through a transfer assembly 22. The pressing head assembly 23 is disposed above the attaching platform 4. The pressing head assembly 23 includes a pressing head body 231. When the ACF is transferred to above the product through the transfer assembly 22, the pressing head body 231 performs a pressing-down action to attach the ACF to the PCB. In order to prevent the pressing head from directly contacting the product or damaging the product due to excessive pressure or high temperature when the pressing head body 231 presses down, a protection area is provided on the contact surface between the pressing head body 231 and the product. The protection area includes a silica gel sheath 232 wrapped around the bottom of the pressing head body 231 and a spring piece 233. When the pressing head body 231 presses down, the silica gel sheath 232 plays a buffering role to prevent the impact force from affecting the product. The upper end of the spring piece 233 is fixed to the pressing head body 231, and the lower end of the spring piece 233 presses the silica gel sheath 232 to prevent the silica gel sheath 232 from falling off.

[0035] Please refer to Figure 5, in this embodiment, in order to prevent the silicone sheath 232 that wraps the ram body 231 from shifting laterally, limiting blocks 234 are fixed on both sides of the ram body 231. The limiting blocks 234 contact both the ram body 231 and the silicone sheath 232 at the same time; a ram seat 235 for conducting heat is fixed above the ram body 231. The ram body 231 is snapped into the ram seat 235. In order to prevent lateral displacement between the ram body 231 and the ram seat 235, ram position-limiting blocks 236 are provided on both sides of the ram seat 235. The ram position-limiting blocks 236 contact both the ram seat 235 and the ram body 231 at the same time; a plurality of heating tubes are embedded in the ram seat 235 to ensure that the ram body 231 reaches the required temperature for attachment. A heat insulation plate 237 is provided above the ram seat 235 to prevent the heat of the ram seat 235 from being conducted upward to other components, damaging the components and shortening their service life. In order to facilitate the adjustment of the horizontal degrees in the lateral and longitudinal directions of the ram, a first horizontal adjustment member 238 is provided above the heat insulation plate 237. A groove is provided in the middle of the first horizontal adjustment member 238. A horizontal adjustment block 2382 is provided in the groove. A central shaft is embedded in the center of the horizontal adjustment block 2382. The periphery of the horizontal adjustment block 2382 and the first horizontal adjustment member 238 are fixedly connected by a first set screw 2381. The front of the horizontal adjustment block 2382 and the front of the first horizontal adjustment member 238 are fixedly connected by a first screw 2384. When adjusting the lateral horizontal degree, first loosen the first screw 2384. With the first central shaft 2383 as the rotation center, swing left and right laterally through the first set screw 2381, so as to achieve the adjustment of the horizontal lateral position. After the adjustment is completed, lock the first screw 2384. An adjustment block 230 is provided in front of the first horizontal adjustment member 238. The adjustment block 230 is fixed on the first horizontal adjustment member 238 and the ram seat 235, tightly fixedly connecting the first horizontal adjustment block and the ram seat 235 to prevent displacement. Of course, when adjusting through the first set screw 2381, the adjustment block 230 also needs to be disassembled. A second horizontal adjustment member 239 is provided above the first horizontal adjustment member 238. Third horizontal adjustment members 2391 are also provided on the left and right sides of the second horizontal adjustment member 239. A second central shaft 2392 passes through the second horizontal adjustment member 239 and the third horizontal adjustment member 2391 in sequence along the horizontal lateral direction. Second screws 2393 are also fixed above and below the second central shaft 2392. The second horizontal adjustment member 239 is fixedly connected to the horizontal adjustment block 2382. The second horizontal adjustment member 239 is provided with a plurality of second set screws. When adjusting the longitudinal horizontal degree, loosen the second screws 2393. With the second central shaft 2392 as the center, adjust the second set screws 2394. After the adjustment is completed, lock the second screws 2393, and the horizontal adjustment in the lateral and longitudinal directions of the ram body 231 can be adjusted quickly and conveniently.

[0036] Please refer to Figure 3, in this embodiment, the tray assembly 21 includes a glue tray 212 around which an ACF is wound. A rotating shaft 213 is provided at the center of the glue tray 212, and the rotating shaft 213 is connected to a motor 211. A rotating plate 215 is also fixed on the rotating shaft 213. One side of the rotating plate 215 is connected to the conveying assembly 22, and a gravity block 214 is fixed on the other side of the rotating plate 215. The conveying assembly 22 includes a first ACF winding wheel 221 and a second ACF winding wheel 222. The rotating plate 215 includes a plurality of adjusting holes 2151. According to different specifications and requirements of the ACF, the first ACF winding wheel 221 can be fixed in the adjusting holes 2151. After the ACF is released from the glue tray 212, it sequentially bypasses the first ACF winding wheel 221 and a plurality of second ACF winding wheels 222. By installing the first ACF winding wheel 221 in different adjusting holes 2151, the ACF forms a vertical or certain angle between the first ACF winding wheel 221 and the second ACF winding wheel 222 for adjustment according to different ACF films, so that the ACF is always in a tensioned state. On the tray of the tray assembly 21, on one side of the gravity block 214 adjacent to the rotating plate 215, there are an induction member and a limiting member. An induction sheet 218 is also fixed on the rotating plate 215. The induction member includes an upper induction member 216 and a lower induction member 217. The rotating plate 215 drives the induction sheet 218 to move between the upper induction member 216 and the lower induction member 217; the gravity block 214 always gives the rotating plate 215 a downward gravity, forming a lever principle. According to the specifications of the ACF, the gravity of the gravity block 214 can be adjusted; when the tension of the ACF is too large, a large component force will act on the first ACF winding wheel 221 installed on the rotating plate 215, thereby driving the rotating plate 215 to rotate clockwise. The induction sheet 218 of the rotating plate 215 triggers the upper induction member 216, and the motor 211 starts to operate, causing the glue tray 212 to release the ACF, thereby adjusting the tension of the ACF so that the ACF with appropriate tension passes through the conveying assembly 22 and is conveyed to the lower part of the pressing head body 231; conversely, when the lower induction member 217 senses the induction sheet 218, through the appropriate position setting of the lower induction member 217, the system can determine that the ACF on the glue tray 212 is exhausted and needs to be replenished, for the induction of judging whether the glue tray 212 is exhausted; the limiting member includes an upper limiting member 219 and a lower limiting member. The upper limiting member 219 and the lower limiting member are respectively on both sides of the rotating plate 215 to prevent the rotating plate 215 from exceeding the induction range of the upper induction member 216 and the lower induction member 217, playing a hard limiting role.

[0037] Please refer to Figure 6 , Figure 7 , in this embodiment, a attaching detection method is provided, including the following steps:

[0038] a: Place the PCB on the attachment platform 4. The ACF on the tray assembly 21 is transferred to the lower part of the press head assembly 23 through the transfer assembly 22. The press head assembly 23 presses down to attach the ACF to the attachment area of the PCB. The first detection unit 5 and / or the second detection unit 6 take pictures of the PCB to obtain the first image and the second image;

[0039] b. The first image includes the first attachment area 51. Within the first attachment area 51, the gray value of the area where the ACF is attached is higher than that of the area where the ACF is not successfully attached. Divide the first attachment area 51 from left to right into the first detection frame 511, the second detection frame 512, and the third detection frame 513. Calculate the area ratio of the gray value areas within the first detection frame 511, the second detection frame 512, and the third detection frame 513 respectively. If the ratio is higher than the preset ratio, it is judged that the first attachment of the ACF on the PCB is qualified; otherwise, it is unqualified and the material throwing action is performed;

[0040] c. Divide the left and right sides of the first attachment area 51 that is qualified for the first time into the fourth detection frame 514 and the fifth detection frame 515. Calculate the ratio of the area of the gray value within the fourth detection frame 514 and the fifth detection frame 515 to the total area of the fourth detection frame 514 and the fifth detection frame 515 respectively. If the ratio is lower than the default set ratio, it is judged that the second attachment of the ACF on the PCB is qualified; otherwise, it is unqualified and the material throwing action is performed.

[0041] The second image also includes the second attachment area. When the first attachment unit 2 and the second attachment unit 3 work together or only the second attachment unit 3 is enabled, repeat the above steps a - c for ACF attachment detection.

[0042] During detection, in the first image obtained by the first detection unit 5, it can be seen that there is an obvious gray value difference between the first attachment area 51 and the area where the ACF is not attached. The gray value can be adjusted according to requirements by adjusting the parameters of the camera, light source, and lens of the first detection unit 5; the size of the first adsorption area and the size of the second adsorption area can be the same or different. When drawing the first detection frame 511, the second detection frame 512, and the third detection frame 513 in the first attachment area 51 and the second attachment area, the lengths of the first detection frame 511, the second detection frame 512, and the third detection frame 513 are the same as the length of the finally qualified first attachment area 51 or the second adsorption area. The left side of the first detection frame 511 and the right side of the third detection frame 513 coincide with the left and right sides of the finally qualified first attachment area 51 or the second adsorption area. The lengths and widths of the first detection frame 511, the second detection frame 512, and the third detection frame 513 are the same and the areas are equal, so as to determine whether the ACF is attached short in the first attachment area 51 and the second attachment area. And in order to better distinguish the first detection frame 511, the second detection frame 512, and the third detection frame 513, there is a gap between the first detection frame 511 and the second detection frame 512, and between the second detection frame 512 and the third detection frame 513.

[0043] When performing step b, the area of the first detection frame 511 is S, the area where the ACF is attached in the first detection frame 511 is S1, the area where the ACF is attached in the second detection frame 512 is S2, and the area where the ACF is attached in the third detection frame 513 is S3. According to the process accuracy, when the ratio value is set to 90%, it is respectively judged whether S1 / S*100%≥90%, S2 / S*100%≥90%, and S3 / S*100%≥90%. If one does not reach the ratio value, it is regarded as unqualified and the material is discarded; further, by determining whether the position of the first unqualified one is the first detection frame 511, the second detection frame 512, or the third detection frame 513, or whether the overall ACF deviates upward or downward, it is judged whether the horizontal degree of the indenter body 231 in the horizontal and vertical directions fails to reach the horizontal accuracy, resulting in the situation that the indenter body 231 cannot be completely pressed down or the position where the indenter body 231 is pressed down deviates.

[0044] When performing step c, the upper and lower widths of the fourth detection frame 514 and the fifth detection frame 515 are the same as the upper and lower widths of the finally qualified first attachment area 51 or the second adsorption area. The right side of the fourth detection frame 514 and the left side of the fifth detection frame 515 coincide with the left and right sides of the finally qualified first attachment area 51 or the second adsorption area respectively. According to the process accuracy, when the proportional value is set to 99%, the area of the fourth detection frame 514 is S10, the area of the fifth detection frame 515 is S20, the area of the ACF attached in the fourth detection frame 514 is S4, and the area of the ACF attached in the fifth detection frame 515 is S5. It is respectively judged that 1 - S4 / S10 * 100% ≥ 99% and 1 - S5 / S20 * 100% ≥ 99%. If one of them does not reach the proportional value, it is regarded as unqualified and the material is discarded. This step can accurately judge whether there is a pasting length of the ACF within the pasting accuracy. The sizes of the fourth detection frame 514 and the fifth detection frame 515 can be drawn according to requirements. The higher the accuracy, the smaller the width.

[0045] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0047] As described above, this is the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An attaching device, characterized in that, It includes a bracket (1), on which there are a first attaching unit (2), a second attaching unit (3) for attaching ACF, and an attaching platform (4) for carrying a PCB. The attaching platform (4) is located below the first attaching unit (2) and the second attaching unit (3). Either the first attaching unit (2) or the second attaching unit (3) or both perform the ACF attaching action simultaneously. Between the first attaching unit (2) and the second attaching unit (3), there are a first detection unit (5) and a second detection unit (6). Either the first detection unit (5) or the second detection unit (6) or both perform actions simultaneously to collect images of the ACF attaching area of the PCB located on the attaching platform (4). The first attaching unit (2) includes a pressing head assembly (23). The pressing head assembly (23) includes a pressing head body (231). The pressing head body (231) includes a protection area, which includes a silica gel sheath (232) wrapped around the bottom of the pressing head body (231) and a shrapnel (233). The upper end of the shrapnel (233) is fixed to the pressing head body (231), and the lower end of the shrapnel (233) presses the silica gel sheath (232). On both sides of the pressing head body (231), there are fixed limit blocks (234), and the limit blocks (234) contact both the pressing head body (231) and the silica gel sheath (232) simultaneously. Above the pressing head body (231), there is a heat-conducting pressing head seat (235). On both sides of the pressing head seat (235), there are pressing head limit blocks (236), and the pressing head limit blocks (236) contact both the pressing head seat (235) and the pressing head body (231) simultaneously. Above the pressing head seat (235), there is a heat-insulating plate (237). Above the heat-insulating plate (237), there is a first horizontal adjusting member (238). There is a groove in the middle of the first horizontal adjusting member (238). Inside the groove, there is a horizontal adjusting block (2382). A first central axis (2383) is embedded in the center of the horizontal adjusting block (2382). The horizontal adjusting block (2382) and the front of the first horizontal adjusting member (238) are fixedly connected by a first screw (2384). There are a plurality of first set screws (2381) around the horizontal adjusting block (2382). In front of the first horizontal adjusting member (238), there is an adjusting block (230), and the adjusting block (230) is fixed to the first horizontal adjusting member (238) and the pressing head seat (235).

2. The attaching device according to claim 1, characterized in that, Above the first horizontal adjustment member (238), there is a second horizontal adjustment member (239). On the left and right sides of the second horizontal adjustment member (239), there are third horizontal adjustment members (2391). The second horizontal adjustment member (239) and the third horizontal adjustment members (2391) pass through the second central axis (2392) from the horizontal center. Above and below the second central axis (2392), there are second screws (2393). On the second horizontal adjustment member (239), there are multiple second set screws (2394).

3. The attaching device according to claim 2, wherein Above the pressing head assembly (23), there is a tray assembly (21) for installing an ACF tray. Between the tray assembly (21) and the pressing head assembly (23), the ACF is transferred through a transfer assembly (22).

4. The attaching device according to claim 3, wherein The tray assembly (21) includes a glue tray (212). At the center of the glue tray (212), there is a rotating shaft (213). The rotating shaft (213) is connected to a motor (211). On the rotating shaft (213), there is also a rotating plate (215) fixed. One side of the rotating plate (215) is adjacent to the transfer assembly (22), and on the other side of the rotating plate (215), there is a gravity block (214) fixed; on the rack of the tray assembly (21), near the side where the gravity block (214) on the rotating plate (215) is located, there are an induction member and a limiting member; on the rotating plate (215), there is also an induction sheet (218) fixed. The induction member includes an upper induction member (216) and a lower induction member (217). The rotating plate (215) drives the induction sheet (218) to move between the upper induction member (216) and the lower induction member (217).

5. The attaching device according to claim 4, wherein When the upper induction member (216) senses the induction sheet (218), the motor (211) starts to start. When the lower induction member (217) senses the induction sheet (218), it checks whether the ACF on the glue tray (212) is used up; the transfer assembly (22) includes multiple ACF winding wheels. The rotating plate (215) includes multiple adjustment holes (2151), and at least one of the ACF winding wheels is fixed to the adjustment holes (2151).

6. A method for attachment detection, characterized in that, Including the following steps: a. Place the PCB on the attaching platform (4). The ACF on the tray assembly (21) is transferred to below the pressing head assembly (23) through the transfer assembly (22). The pressing head assembly (23) presses down to attach the ACF to the attaching area of the PCB. The first detection unit (5) and the second detection unit (6) take pictures of the PCB to obtain a first image and a second image; b. The first image includes a first attachment area (51). Within the first attachment area (51), the gray value of the area where the ACF is attached is higher than that of the area where the ACF is not successfully attached. The first detection frame (511), the second detection frame (512), and the third detection frame (513) are divided from left to right within the first attachment area (51). The area ratios of the gray value areas within the first detection frame (511), the second detection frame (512), and the third detection frame (513) are calculated respectively. If the ratio is higher than the preset ratio, it is determined that the first qualification of the ACF attachment on the PCB is passed; otherwise, it is unqualified and a rejection operation is performed. c. The fourth detection frame (514) and the fifth detection frame (515) are divided on the left and right sides of the first attachment area (51) that passes the first qualification. The area ratios of the gray values within the fourth detection frame (514) and the fifth detection frame (515) to the total areas of the fourth detection frame (514) and the fifth detection frame (515) are calculated respectively. If the ratio is lower than the default set ratio, it is determined that the second qualification of the ACF attachment on the PCB is passed; otherwise, it is unqualified and a rejection operation is performed.

7. The attachment detection method according to claim 6, characterized in that, The maximum upper and lower widths of the first detection frame (511), the second detection frame (512), and the third detection frame (513) are equal to the width of the ultimately qualified first attachment area (51). The left side of the first detection frame (511) and the right side of the third detection frame (513) coincide with the left and right sides of the ultimately qualified first attachment area (51) respectively.

8. The attachment detection method according to claim 7, wherein, The first detection frame (511), the second detection frame (512), and the third detection frame (513) have the same length and width, equal areas, and are separated from each other between the first detection frame (511) and the second detection frame (512), and between the second detection frame (512) and the third detection frame (513).

9. The attachment detection method according to claim 8, wherein The maximum upper and lower widths of the fourth detection frame (514) and the fifth detection frame (515) are equal to the width of the length of the ultimately qualified first attachment area (51). The right side of the fourth detection frame (514) and the left side of the fifth detection frame (515) coincide with the left and right sides of the ultimately qualified first attachment area (51) respectively.

Images