Attaching equipment and attaching detection method

Abstract

The invention provides an attaching device and an attaching detection method, and relates to the technical field of bonding, a first attaching unit and a second attaching unit are arranged face to face and can be attached together or one pair of attaching platforms is selected to conduct attaching action, when one pair of attaching platforms is selected to conduct attaching, materials on the other side are selected to be changed, high-speed attaching and uninterrupted attaching can be achieved, and the attaching efficiency is improved. The attaching efficiency is improved; image detection is carried out on the first attaching area where attaching is completed, a first detection frame, a second detection frame and a third detection frame are drawn in the first attaching area, whether the ACF in the first attaching area is excessively short and obliquely attached or not is judged, if yes, whether the ACF is the first detection frame or the second detection frame or the third detection frame can be further judged, and if not, the ACF in the first attaching area can be detected. A specific position and a reason are judged; when the ACF is qualified, a fourth detection frame and a fifth detection frame are drawn on the left side and the right side of the first attaching area to judge whether the ACF is excessively long or not.

Description

Technical Field

[0001] The present application relates to the field of bonding technology, and in particular to an attachment device and an attachment detection method. Background Art

[0002] In the field of LED liquid crystal panel display manufacturing, FOB bonding machine is a production equipment used to establish stable mechanical and electrical connection between printed circuit board (PCB) and flexible circuit board (FPC). It adopts machine vision alignment, precision motion control and other technologies, and achieves electrical and mechanical connection between fine-pitch PCB and FPC through anisotropic conductive film (ACF) bonding 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 corresponds to the vertical direction of the PPC, and the lower pressure head and the upper pressure head cooperate to complete the bonding.

[0003] At present, the demand for extra-large glass panels is increasing. When bonding larger glass panels, the FPC is first attached to the PCB through ACF, and then the attached PCB and the glass panel are pressure-bonded. As the size of the PCB becomes longer as the glass panel becomes larger, the attachment area of ​​the ACF also becomes longer. Depending on the process requirements, there is also the possibility of multi-stage ACF attachment.

[0004] However, in the case of a large ACF attachment area, it is currently impossible to achieve high-speed ACF attachment and uninterrupted ACF attachment. At the same time, after the ACF attachment is completed, it is impossible to effectively and accurately detect whether the ACF is too long or too short, and it is also impossible to determine the specific unqualified attachment location and the cause of the poor attachment for unqualified attachment results. Summary of the invention

[0005] The present invention proposes an attachment device and an attachment detection method to solve the technical problems existing in the prior art that high-speed ACF attachment and uninterrupted ACF attachment work cannot be achieved, and at the same time, after the ACF attachment is completed, it is impossible to effectively and accurately detect whether the ACF is too long or too short, and the specific unqualified attachment position and the cause of the poor attachment cannot be determined for unqualified attachment results.

[0006] To solve the above problems, the technical solution adopted by the present invention is: The present invention provides an attaching device, comprising a bracket, wherein a first attaching unit for attaching an ACF, a second attaching unit and an attaching platform for carrying a PCB are arranged on the bracket, the attaching platform is located below the first attaching unit and the second attaching unit, and the first attaching unit and the second attaching unit are selectively or both perform an ACF attaching action; a first detection unit and a second detection unit are arranged between the first attaching unit and the second attaching unit, and the first detection unit and the second detection unit are selectively or both perform an ACF attaching action simultaneously to perform image acquisition on the ACF attaching area of ​​the PCB located on the attaching platform.

[0007] Furthermore, the first attachment 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 silicone sheath wrapped around the bottom of the pressing head body and a spring, the upper end of the spring is fixed to the pressing head body, and the lower end of the spring presses the silicone sheath.

[0008] Furthermore, limit blocks are fixed on both sides of the pressure head body, and the limit blocks contact the pressure head body and the silicone sheath at the same time; a pressure head seat that conducts heat is fixed above the pressure head body, and pressure head limit blocks are provided on both sides of the pressure head seat, and the pressure head limit blocks contact the pressure head seat and the pressure head body at the same time; an insulation board is provided above the pressure head seat.

[0009] Furthermore, a first horizontal adjustment piece is provided above the insulation board, a groove is provided in the middle of the first horizontal adjustment piece, a horizontal adjustment block is provided in the groove, a first central axis is embedded in the center of the horizontal adjustment block, the horizontal adjustment block is fixedly connected to the front of the first horizontal adjustment piece by a first screw, and a plurality of first top screws are provided around the horizontal adjustment block; an adjustment block is provided in front of the first horizontal adjustment piece, and the adjustment block is fixed on the first horizontal adjustment piece and the pressure head seat.

[0010] Furthermore, a second horizontal adjustment member is provided above the first horizontal adjustment member, and a third horizontal adjustment member is provided on the left and right sides of the second horizontal adjustment member. The second horizontal adjustment member and the third horizontal adjustment member pass through the second central axis from the horizontal center, second screws are provided above and below the second central axis, and a plurality of second top screws are provided on the second horizontal adjustment member.

[0011] Furthermore, a tray assembly for mounting the ACF tray is provided above the pressing head assembly, and the ACF is transferred between the tray assembly and the pressing head assembly via a transfer assembly.

[0012] Furthermore, the material tray assembly includes a rubber tray, a rotating shaft is provided at the center of the rubber tray, the rotating shaft is connected to the 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 material rack of the material tray assembly, a sensing part and a limiting part are provided on the side adjacent to the gravity block on the rotating plate; an induction sheet is also fixed on the rotating plate, the induction sheet includes an upper induction sheet and a lower induction sheet, and the rotating plate drives the induction sheet to move between the upper induction sheet and the lower induction sheet.

[0013] Furthermore, when the upper sensing element senses the sensing sheet, the motor starts to start, and when the lower sensing element senses the sensing sheet, it checks whether the ACF on the rubber disc is used up; the conveying component includes multiple ACF winding wheels, the rotating plate includes multiple adjustment holes, and at least one ACF winding wheel is fixed on the adjustment hole.

[0014] In addition, the present application also discloses an attachment detection method, comprising the following steps: a. Place the PCB on the attachment platform, and the ACF on the tray assembly is transferred to the bottom of the pressing head assembly by the conveying assembly. The pressing head assembly is pressed down to attach the ACF to the attachment area of ​​the PCB. The first detection unit and the second detection unit take pictures of the PCB to obtain the first image and the second image; b. The first image includes a first attachment area. In the first attachment area, the grayscale value of the area where the ACF is attached is higher than the area where the ACF is not successfully attached. The first attachment area is divided into a first detection frame, a second detection frame, and a third detection frame from left to right. The area ratios of the grayscale value areas in the first detection frame, the second detection frame, and the third detection frame are calculated respectively. If the ratio is higher than the preset ratio, the first ACF attachment on the PCB is judged to be qualified, otherwise it is unqualified and the material is discarded; c. Divide the left and right sides of the first qualified first attachment area into a fourth inspection frame and a fifth inspection frame, and calculate the ratio of the area of ​​the grayscale value in the fourth inspection frame and the fifth inspection frame to the total area of ​​the fourth inspection frame and the fifth inspection frame respectively. If the ratio is lower than the default setting ratio, the second ACF attachment on the PCB is judged to be qualified, otherwise it is unqualified and the material is discarded.

[0015] Furthermore, the upper and lower maximum widths of the first detection frame, the second detection frame and the third detection frame are equal to the width of the final qualified first attachment area, and the left side of the first detection frame and the right side of the third detection frame overlap with the left and right sides of the final qualified first attachment area respectively.

[0016] Furthermore, the first detection frame has the same length and width as the second detection frame and the third detection frame, and has the same area, and the first detection frame and the second detection frame, and the second detection frame and the third detection frame are separated from each other.

[0017] Furthermore, the upper and lower maximum widths of the fourth detection frame and the fifth detection frame are equal to the width of the length of the final qualified first attachment area, and the right side of the fourth detection frame and the left side of the fifth detection frame overlap with the left and right sides of the final qualified first attachment area respectively.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an attaching device and an attaching detection method. By arranging a first attaching unit and a second attaching unit face to face, a pair of attaching platforms can be attached together or selected for attaching. When one of them is selected for attachment, the other side performs ACF material replacement. Alternating operations can realize high-speed attachment and uninterrupted attachment, thereby improving attachment efficiency. A first detection unit and a second detection unit are used to take photos of a PCB after attachment, obtain a first image and a second image, and select a corresponding first attaching area for image detection. A first detection frame, a second detection frame, and a third detection frame are drawn in the first attaching area to judge whether the ACF in the first attaching area is excessively short and tilted. If so, it can be further judged 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. If qualified, a fourth detection frame and a fifth detection frame are drawn on the left and right sides of the first attaching area to judge whether the ACF is excessively long, thereby realizing automatic ACF attachment quality detection, thereby improving the consistency and yield rate of attachment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution proposed in the present invention, it is described in detail below in combination with the embodiments and drawings. It should be understood that the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, these drawings can be changed under the concept of the present invention.

[0020] Figure 1 A three-dimensional diagram of an embodiment of the attachment device provided by the present invention; Figure 2 A three-dimensional diagram of an embodiment of a first attachment unit provided by the present invention; Figure 3 A three-dimensional diagram of an embodiment of a material tray assembly provided by the present invention; Figure 4 A partially enlarged stereoscopic view of the pressure head assembly provided by the present invention; Figure 5 A partially enlarged stereoscopic view of the pressure head assembly provided by the present invention from another viewing angle; Figure 6 is a schematic diagram of a first detection frame, a second detection frame, and a third detection frame of a first image in an embodiment of the present invention; Figure 7 Schematic diagram of a fourth detection box and a fifth detection box in a first image according to an embodiment of the present invention.

[0021] 1. Bracket; 2. First attaching unit; 21. Material tray assembly; 211. Motor; 212. Rubber disc; 213. Rotating shaft; 214. Gravity block; 215. Rotating plate; 2151. Adjusting hole; 216. Upper induction member; 217. Lower induction member; 218. Induction sheet; 219. Upper limit member; 22. Conveying assembly; 221. First ACF winding wheel; 222. Second ACF winding wheel; 23. Pressing head assembly; 230. Adjusting block; 231. Pressing head body; 232. Silicone sheath; 233. Shrapnel; 234. Limiting block; 235. Pressing head seat; 236. Pressing head limiting block; 237 , heat insulation board; 238, first horizontal adjustment member; 2381, first top screw; 2382, horizontal adjustment block; 2383, first center axis; 2384, first screw; 239, second horizontal adjustment member; 2391, third horizontal adjustment member; 2392, second center axis; 2393, second screw; 2394, second top 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 DESCRIPTION

[0022] Please also read Figure 1 In this embodiment, the present invention provides an attaching device, including a bracket 1, on which a first attaching unit 2 and a second attaching unit 3 for attaching ACF are provided, the first attaching unit 2 and the second attaching unit 3 are arranged face to face with each other, an attaching platform 4 for carrying PCB is provided below the first attaching unit 2 and the second attaching unit 3, the first attaching unit 2 and the second attaching unit 3 jointly perform an attaching action on the attaching platform 4, according to the attaching requirements, the first attaching unit 2 and the second attaching unit 3 perform an attaching action at the same time to improve the attaching efficiency, or the first attaching unit 2 or the second attaching unit 3 is selected to perform the attaching action, at this time, in the case of uninterrupted implementation, the paused first attaching unit 2 or the second attaching unit 3 can perform actions such as material replacement or maintenance; the bracket 1 is also provided with a first detection unit 5 and a second detection unit 6, the first detection unit 5 and the second detection unit 6 are arranged between the first attaching unit 2 and the second attaching unit 3, the first detection unit 5 detects the attaching effect of the first attaching unit 2, and the second detection unit 6 detects the attaching effect of the second attaching unit 3.

[0023] Please also read Figure 2 , Figure 4In this embodiment, the first attaching unit 2 includes a pressing head assembly 23, and a tray assembly 21 for installing the ACF tray is provided above the pressing head assembly 23. The ACF is transferred between the tray assembly 21 and the pressing head assembly 23 through a conveying assembly 22; the pressing head assembly 23 is arranged above the attaching platform 4, and the pressing head assembly 23 includes a pressing head assembly 231. When the ACF is transferred to the top of the product through the conveying assembly 22, the pressing head assembly 231 performs a downward pressing action to attach the ACF to the PCB. In order to When the pressure head 231 is pressed down, a protection zone is provided on the contact surface between the pressure head assembly 231 and the product to prevent the pressure head from directly contacting the product or excessive pressure or temperature from damaging the product. The protection zone includes a silicone sheath 232 and a spring piece 233 wrapped around the bottom of the pressure head assembly 231. When the pressure head assembly 231 is pressed down, the silicone sheath 232 acts as a buffer to prevent the impact force from affecting the product. The upper end of the spring piece 233 is fixed to the pressure head assembly 231, and the lower end of the spring piece 233 presses the silicone sheath 232 to prevent the silicone sheath 232 from falling off.

[0024] Please also read Figure 5In this embodiment, in order to prevent the silicone sheath 232 that wraps the pressure head assembly 231 from being displaced in the lateral direction, limit blocks 234 are fixed on both sides of the pressure head assembly 231, and the limit blocks 234 contact the pressure head assembly 231 and the silicone sheath 232 at the same time; a pressure head seat 235 for conducting heat is fixed above the pressure head assembly 231, and the pressure head assembly 231 is inserted into the pressure head seat 235. In order to prevent the pressure head assembly 231 and the pressure head seat 235 from being displaced in the lateral direction, pressure head limit blocks 236 are provided on both sides of the pressure head seat 235, and the pressure head limit blocks 236 contact the pressure head seat 235 and the pressure head assembly 231 at the same time; a plurality of heating pipes are embedded in the pressure head seat 235 to ensure that the pressure head assembly 231 reaches the required temperature for attachment, and a heat insulation board 237 is provided above the pressure head seat 235 to prevent the heat of the pressure head seat 235 from being transmitted upward to other components, thereby damaging the components and shortening their service life. In order to facilitate the adjustment of the lateral and longitudinal horizontality of the pressure head, a first horizontal adjustment piece 238 is provided above the insulation board 237. A groove is provided in the middle of the first horizontal adjustment piece 238, and a horizontal adjustment block 2382 is provided in the groove. A central axis is embedded in the center of the horizontal adjustment block 2382. The four sides of the horizontal adjustment block 2382 are fixedly connected to the first horizontal adjustment piece 238 by a first top screw 2381, and the front of the horizontal adjustment block 2382 is fixedly connected to the front of the first horizontal adjustment piece 238 by a first screw 2384. When adjusting the lateral horizontality, first loosen the first screw 2384, and the first central axis 2383 is the rotation center. It swings horizontally left and right through the first top screw 2381 to adjust the horizontal 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 pressure head seat 235, and the first horizontal adjustment block and the pressure head seat 235 are tightly fixed and connected to prevent displacement. Of course, when adjusting through the first top screw 2381, the adjustment block 230 must also be disassembled. A second horizontal adjustment piece 239 is provided above the first horizontal adjustment piece 238, and a third horizontal adjustment piece 2391 is provided on the left and right sides of the second horizontal adjustment piece 239. The second center axis 2392 passes through the second horizontal adjustment piece 239 and the third horizontal adjustment piece 2391 in sequence along the horizontal direction. The second center axis 2392 is also fixed with a second screw 2393 above and below. The second horizontal adjustment piece 239 is fixedly connected to the horizontal adjustment block 2382. The second horizontal adjustment piece 239 is provided with a plurality of second top screws. When adjusting the longitudinal horizontality, loosen the second screw 2393, and adjust the second top screw 2394 with the second center axis 2392 as the center. After the adjustment is completed, lock the second screw 2393, so as to quickly and conveniently adjust the lateral and longitudinal horizontal adjustment of the pressure head assembly 231.

[0025] Please also read Figure 3In this embodiment, the material tray assembly 21 includes a rubber disk 212 on which ACF is wound. A rotating shaft 213 is provided at the center of the rubber disk 212. The rotating shaft 213 is connected to the 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 to the other side of the rotating plate 215. The conveying component 22 includes a first ACF winding wheel 221 and a second ACF winding wheel 222. The rotating plate 215 includes a plurality of adjustment holes 2151. The first ACF winding wheel 221 can be fixed in the adjustment hole 2151 according to different specifications and requirements of ACF. After the ACF is released from the rubber disc 212, it passes around the first ACF winding wheel 221 and the plurality of second ACF winding wheels 222 in sequence. By installing the first ACF winding wheel 221 in different adjustment holes 2151, the ACF passes around the first ACF winding wheel 221 and the second ACF winding wheel 222 to form a vertical or certain angle, so as to be adjusted according to different ACF films so that the ACF is always in a tensioned state. On the material rack of the material tray assembly 21, a sensing member and a limit member are provided on one side of the gravity block 214 adjacent to the rotating plate 215. A sensing sheet 218 is also fixed on the rotating plate 215. The sensing member includes an upper sensing member 216 and a lower sensing member 217. The rotating plate 215 drives the sensing sheet 218 to move between the upper sensing member 216 and the lower sensing member 217. The gravity block 214 always gives the rotating plate 215 a downward gravity, forming a lever principle. The gravity of the gravity block 214 can be adjusted according to the specifications of the ACF. When the tension of the ACF is too large, a larger component force will act on the reel 221 installed on the rotating plate 215, thereby driving the rotating plate 215 to rotate clockwise, and the sensing sheet 218 of the rotating plate 215 will move the upper sensing member 216 and the lower sensing member 217. The sensing element 216 is triggered, and the motor 211 starts to start, so that the glue disc 212 releases the ACF, and then adjusts the tension of the ACF so that the ACF with appropriate tension is transmitted to the bottom of the pressure head assembly 231 through the transmission assembly 22; on the contrary, when the lower sensing element 217 senses the sensing sheet 218, the system can determine that the ACF on the glue disc 212 is exhausted and needs to be replenished through the appropriate position setting of the lower sensing element 217, which is used to determine whether the material disc 212 is exhausted; the limit member includes an upper limit member 219 and a lower limit member, and the upper limit member 219 and the lower limit member are respectively on both sides of the rotating plate 215 to prevent the rotating plate 215 from exceeding the sensing range of the upper sensing element 216 and the lower sensing element 217, thereby playing a hard limit role.

[0026] Please also read Figure 6 , Figure 7 In this embodiment, a method for detecting an attachment is provided, comprising the following steps: a: The PCB is placed on the attachment platform 4, and the ACF on the tray assembly 21 is transferred to the bottom of the pressing head assembly 23 by the conveying assembly 22. The pressing 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; b. The first image includes a first attachment area 51. In the first attachment area 51, the grayscale value of the area where the ACF is attached is higher than the area where the ACF is not attached successfully. The first attachment area 51 is divided into a first detection frame 511, a second detection frame 512, and a third detection frame 513 from left to right. The area ratios of the grayscale value areas in 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 attachment of the ACF on the PCB is qualified, otherwise it is unqualified and the material is discarded; c. Divide the left and right sides of the first qualified first attachment area 51 into a fourth inspection frame 514 and a fifth inspection frame 515, and calculate the ratio of the area of ​​the grayscale value in the fourth inspection frame 514 and the fifth inspection frame 515 to the total area of ​​the fourth inspection frame 514 and the fifth inspection frame 515 respectively. If the ratio is lower than the default setting ratio, it is judged that the second ACF attachment on the PCB is qualified, otherwise it is unqualified and the material is discarded.

[0027] The second image also includes the second attaching area. When the first attaching unit 2 and the second attaching unit 3 work together or only the second attaching unit 3 is enabled, the above steps ac are repeated to perform ACF attaching detection.

[0028] During the inspection, in the first image obtained by the first inspection unit 5, it can be seen that there is an obvious grayscale value difference between the first attachment area 51 and the area without ACF attached. The grayscale value can be adjusted according to the needs to adjust the various parameters of the camera, light source, and lens of the first inspection unit 5; the size of the first adsorption area can be the same as or different from the size of the second adsorption area. When the first inspection frame 511, the second inspection frame 512, and the third inspection frame 513 are drawn in the first attachment area 51 and the second attachment area, the length of the first inspection frame 511, the second inspection frame 512, and the third inspection frame 513 is the same as the length of the first attachment area 51 or the second adsorption area. The lengths of the attachment areas are the same, the left side of the first inspection frame 511 and the right side of the third inspection frame 513 coincide with the left side and right side of the finally qualified first attachment area 51 or the second adsorption area, the length and width of the first inspection frame 511 and the second inspection frame 512 and the third inspection frame 513 are consistent, and the area is equal, so it can be determined whether the ACF is too short in the first attachment area 51 and the second attachment area, and in order to better distinguish the first inspection frame 511 from the second inspection frame 512 and the third inspection frame 513, the first inspection frame 511 and the second inspection frame 512, as well as the second inspection frame 512 and the third inspection frame 513 are spaced from each other.

[0029] When performing step b, the area of ​​the first inspection frame 511 is S, the area of ​​the ACF attached in the first inspection frame 511 is S1, the area of ​​the ACF attached in the second inspection frame 512 is S2, and the area of ​​the ACF attached in the third inspection frame 513 is S3. According to the process accuracy, when the ratio value is set to 90%, it is judged that S1 / S*100%≥90%, S2 / S*100%≥90%, and S3 / S*100%≥90% respectively. If one of them does not reach the ratio value, it is regarded as unqualified and the material is discarded; further, according to whether the first unqualified position is the first inspection frame 511, the second inspection frame 512, or the third inspection frame 513, or the overall ACF deviates upward or downward, it is judged whether the lateral and longitudinal horizontality of the pressure head assembly 231 does not reach the horizontal accuracy, resulting in the inability of the pressure head assembly 231 to be completely pressed down or the position of the pressure head assembly 231 deviates from the pressing position.

[0030] When performing step c, the upper and lower widths of the fourth inspection frame 514 and the fifth inspection frame 515 are the same as the upper and lower widths of the finally qualified first attachment area 51 or the second adsorption area, and the right side of the fourth inspection frame 514 and the left side of the fifth inspection frame 515 overlap with the left side and the right side of the finally qualified first attachment area 51 or the second adsorption area respectively; according to the process accuracy, if the ratio value is set to 99%, the area of ​​the fourth inspection frame 514 is S10, the area of ​​the fifth inspection frame 515 is S20, the area of ​​the ACF attached in the fourth inspection frame 514 is S4, and the area of ​​the ACF attached in the fifth inspection frame 515 is S5, and it is judged that 1-S4 / S10*100%≥99% and 1-S5 / S20*100%≥99% respectively. If one of them does not reach the ratio value, it is regarded as unqualified and the material is discarded. This step can accurately determine whether the ACF is attached within the attachment accuracy. The size of the fourth inspection frame 514 and the fifth inspection frame 515 can be drawn according to needs, and the higher the accuracy, the smaller the width.

[0031] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] The above is a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A bonding device, characterized in that: The invention comprises a support (1), wherein the support (1) is provided with a first attaching unit (2) for attaching an ACF, a second attaching unit (3) and an attaching platform (4) for carrying a PCB, wherein the attaching platform (4) is located below the first attaching unit (2) and the second attaching unit (3), and the first attaching unit (2) and the second attaching unit (3) either or both thereof perform an ACF attaching action; and a first detection unit (5) and a second detection unit (6) are provided between the first attaching unit (2) and the second attaching unit (3), and the first detection unit (5) and the second detection unit (6) either or both thereof perform an ACF attaching action to acquire an image of the ACF attaching area of ​​the PCB located on the attaching platform (4).

2. The attaching device according to claim 1, characterized in that: The first attachment unit (2) comprises a pressing head assembly (23), the pressing head assembly (23) comprises a pressing head body (231), the pressing head body (231) comprises a protection zone, the protection zone comprises a silicone sheath (232) wrapped around the bottom of the pressing head body (231) and a spring sheet (233), the upper end of the spring sheet (233) is fixed to the pressing head body (231), and the lower end of the spring sheet (233) presses the silicone sheath (232).

3. The attaching device according to claim 2, characterized in that: Limit blocks (234) are fixed on both sides of the pressure head body (231), and the limit blocks (234) are in contact with both the pressure head body (231) and the silicone sheath (232); a pressure head seat (235) for conducting heat is fixed above the pressure head body (231), and pressure head limit blocks (236) are provided on both sides of the pressure head seat (235), and the pressure head limit blocks (236) are in contact with both the pressure head seat (235) and the pressure head body (231); a heat insulation board (237) is provided above the pressure head seat (235).

4. The attaching device according to claim 3, characterized in that: 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 first central axis (2383) is embedded in the center of the horizontal adjustment block (2382), the horizontal adjustment block (2382) is fixedly connected to the front of the first horizontal adjustment member (238) by a first screw (2384), and a plurality of first top screws (2381) are provided around the horizontal adjustment block (2382); an adjustment block (230) is provided in front of the first horizontal adjustment member (238), and the adjustment block (230) is fixed on the first horizontal adjustment member (238) and the pressure head seat (235).

5. The attaching device according to claim 4, characterized in that: A second horizontal adjustment member (239) is provided above the first horizontal adjustment member (238), and a third horizontal adjustment member (2391) is provided on the left and right sides of the second horizontal adjustment member (239). The second horizontal adjustment member (239) and the third horizontal adjustment member (2391) pass through a second central axis (2392) from the transverse center, and second screws (2393) are provided above and below the second central axis (2392), and a plurality of second top screws (2394) are provided on the second horizontal adjustment member (239).

6. The attaching device according to claim 2, characterized in that: A tray assembly (21) for mounting an ACF tray is provided above the pressing head assembly (23), and the ACF is transported between the tray assembly (21) and the pressing head assembly (23) via a transport assembly (22).

7. The attaching device according to claim 6, characterized in that: The material tray assembly (21) comprises a rubber tray (212), a rotating shaft (213) is provided at the center of the rubber tray (212), the rotating shaft (213) is connected to the motor (211), a rotating plate (215) is also fixed on the rotating shaft (213), one side of the rotating plate (215) is adjacent to the conveying assembly (22), and a gravity block (214) is fixed on the other side of the rotating plate (215); a sensing element and a limiting element are provided on the material rack of the material tray assembly (21), adjacent to the side of the gravity block (214) on the rotating plate (215); a sensing sheet (218) is also fixed on the rotating plate (215), the sensing element comprises an upper sensing element (216) and a lower sensing element (217), and the rotating plate (215) drives the sensing sheet (218) to move between the upper sensing element (216) and the lower sensing element (217).

8. The attaching device according to claim 7, characterized in that: When the upper sensing member (216) senses the sensing sheet (218), the motor (211) starts to start, and when the lower sensing member (217) senses the sensing sheet (218), it checks whether the ACF on the rubber disk (212) is used up; the conveying component (22) includes a plurality of ACF winding wheels, the rotating plate (215) includes a plurality of adjustment holes (2151), and at least one of the ACF winding wheels is fixed on the adjustment hole (2151).

9. A method for detecting adhesion, characterized in that: The following steps are involved: a. placing the PCB on the attachment platform (4), transferring the ACF on the tray assembly (21) to the bottom of the pressing head assembly (23) through the transfer assembly (22), pressing the pressing head assembly (23) to attach the ACF to the attachment area of ​​the PCB, and taking photos of the PCB by the first detection unit (5) and the second detection unit (6) to obtain a first image and a second image; b. The first image includes a first attachment area (51). In the first attachment area (51), the grayscale 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 attachment area (51) is divided into a first detection frame (511), a second detection frame (512), and a third detection frame (513) from left to right. The area ratios of the grayscale value areas in 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 a preset ratio, it is determined that the first attachment of the ACF on the PCB is qualified. Otherwise, it is unqualified and the material is discarded; c. Divide the left and right sides of the first qualified attachment area (51) into a fourth detection frame (514) and a fifth detection frame (515), respectively calculate the ratio of the area of ​​the gray value in 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), if the ratio is lower than the default ratio, the second ACF attachment on the PCB is judged to be qualified, otherwise it is unqualified and the material is discarded.

10. The attachment detection method according to claim 9, characterized in that: The upper and lower maximum 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 first attachment area (51) that is finally qualified, and the left side of the first detection frame (511) and the right side of the third detection frame (513) respectively overlap with the left and right sides of the first attachment area (51) that is finally qualified.

11. The attachment detection method according to claim 10, characterized in that: The first detection frame (511) has the same length and width as the second detection frame (512) and the third detection frame (513), and has the same area, and the first detection frame (511) and the second detection frame (512) and the second detection frame (512) and the third detection frame (513) are separated from each other.

12. The attachment detection method according to claim 11, characterized in that: The upper and lower maximum widths of the fourth detection frame (514) and the fifth detection frame (515) are equal to the width of the length of the first attachment area (51) that is finally qualified, and the right side of the fourth detection frame (514) and the left side of the fifth detection frame (515) respectively overlap with the left and right sides of the first attachment area (51) that is finally qualified.

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