Precise positioning carrier plate for AOI detection

Abstract

The utility model discloses a kind of precision positioning carrier plates for AOI detection, including sliding carrier plate, the top four corners of the sliding carrier plate are uniformly fixed with first connecting piece, the top of the first connecting piece is fixed with carrier plate, the top of the carrier plate is arrayed with multiple through holes, cleaning piece is slidably attached to the inner wall of the through hole, the inner wall of the cleaning piece is provided with one-way valve, the bottom of the cleaning piece is fixed with bearing plate, the lower portion of the bearing plate is provided with cavity cover for forming cavity, the two adjacent edges of the top of the sliding carrier are provided with two resistance components, the opposite edge of the top of the sliding carrier and multiple resistance components is provided with multiple clamping pieces. With self-cleaning function: when airflow blows out, one-way valve blocks airflow, makes airflow produce lifting force to lift bearing plate and drive cleaning piece to slide up and down, synchronously scrapes off through hole mouth impurity, bearing plate realizes multiple cleaning piece linkage promotion efficiency, solve the pain point that adsorption failure, frequent manual maintenance caused by through hole blockage.

Description

Technical Field

[0001] This utility model relates to the field of workpiece positioning technology for AOI equipment, specifically a precision positioning carrier plate for AOI inspection. Background Technology

[0002] In the AOI equipment inspection process, the precision positioning carrier plate is the core component for carrying and positioning the workpiece. Its positioning accuracy, workpiece fixing stability and maintenance convenience directly determine the accuracy of the inspection results and the inspection efficiency. As the electronics manufacturing industry develops towards miniaturization and high density, the requirements for workpiece size accuracy are constantly increasing, which puts forward higher requirements for the performance of the positioning carrier plate used for AOI inspection. However, the existing positioning carrier plates still have many key technical defects.

[0003] The positioning accuracy of existing carrier plates is generally insufficient, which can easily lead to detection errors. They often use a single clamping or simple adsorption method to position the workpiece. When clamped by a cylinder, there is a lack of a stable reference positioning edge, and the workpiece is prone to lateral movement due to the offset of the clamping force. When relying solely on negative pressure adsorption...

[0004] The adsorption system is prone to clogging and has high maintenance costs, which are also prominent problems. To improve adsorption stability, existing carriers often have arrayed through holes on the bearing surface to form a uniform negative pressure. However, impurities such as solder dross and dust generated in electronic manufacturing scenarios can easily clog the through holes. On the one hand, after clogging, the local adsorption force fails, causing the workpiece to shift and requiring the machine to be stopped for manual cleaning. On the other hand, manual cleaning requires unclogging each through hole one by one, which is cumbersome and can easily damage the plane accuracy of the carrier, seriously affecting the efficiency of the production line. Although some carriers have added filter structures, the filter element needs to be replaced regularly, which further increases the cost of consumables and downtime. Utility Model Content

[0005] The purpose of this invention is to provide a precision positioning carrier plate for AOI inspection, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a sliding carrier, with first connecting members fixed at each of the four corners of the top end of the sliding carrier. A carrier plate for supporting workpieces is fixed to the top end of each first connecting member. Multiple through holes for adsorbing workpieces are arrayed on the top end of the carrier plate. A cleaning member for cleaning impurities from the through hole opening is slidably fitted to the inner wall of each through hole. A one-way valve is provided on the inner wall of the cleaning member. A support plate is fixed to the bottom end of the cleaning member. A cavity cover for forming a cavity is provided below the support plate.

[0007] Two abutment components are provided on each of the two adjacent edges at the top of the sliding carrier. A reset component is provided on one side of the bottom end of the abutment component. Multiple clamping members are provided on the opposite edges of the top of the sliding carrier and the multiple abutment components. A second connecting member is fixed to the bottom end of the clamping member, and a cylinder is fixed to one end of the second connecting member.

[0008] Preferably, the anti-force component includes anchoring blocks, the plurality of anchoring blocks are attached to two adjacent edges of the top of the sliding base, and two anchoring blocks are attached to each edge. A fixing rod is fixed to the bottom end of the anchoring block, and an operating component is fixed to one side of the bottom end of the fixing rod.

[0009] Preferably, the reset assembly includes a support member, which is fixedly connected to both sides of the operating member, and a connecting rod is fixed between the two support members, with an elastic element sleeved on the outer wall of the connecting rod.

[0010] Preferably, a strip-shaped through groove is provided at the center of the operating component, and a connecting rod passes through the inner wall of the strip-shaped through groove, and the strip-shaped through groove matches the connecting rod.

[0011] Preferably, the carrier plate has a groove inside that fits with the cavity cover, so that the inside of the carrier plate forms a cavity.

[0012] Preferably, the bottom end of the cavity cover has a through hole, which is fixedly connected to the air tube.

[0013] Preferably, the one-way valve includes a retaining ring, which is fixed to the inner wall of the cleaning component. A wedge is attached to the inner wall of the retaining ring, and a connecting rod is fixed to the top of the wedge. A resistance block is fixed to the top of the connecting rod, and a spring is sleeved on the outer wall of the connecting rod. One end of the spring is fixedly connected to the bottom end of the resistance block, and the other end is fixedly connected to the top of the retaining ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are: Stable adsorption and self-cleaning function: The carrier plate and the cavity cover form a sealed cavity. The array of through holes, together with the one-way valve, achieves uniform negative pressure adsorption, avoiding workpiece deformation or displacement. The one-way valve, through the unidirectional airflow conduction characteristic, blocks the airflow when it blows out, causing the airflow to generate an upward force to lift the carrier plate and drive the cleaning parts to slide up and down, simultaneously scraping away impurities at the through hole opening. The carrier plate enables multiple cleaning parts to work together to improve efficiency, eliminating the need for manual cleaning of each one, and solving the pain points of through hole blockage leading to adsorption failure and frequent manual maintenance.

[0015] Adaptive clamping: The force-resisting component works in conjunction with the reset component. When the anchoring clamp is pushed by the workpiece, it can be finely adjusted along the connecting rod. The elastic element provides reset force in real time, reducing incomplete fit caused by the workpiece placement position. The cylinder clamping force can be adjusted by air pressure. The clamping parts adopt a flexible anti-slip design, which avoids damage to the workpiece due to excessive clamping force and prevents loose positioning due to insufficient clamping force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A frontal sectional view of the overall structure. Figure 3 for Figure 1 Top view sectional diagram of the overall structure; Figure 4 for Figure 1 A schematic diagram of the overall structure from below; Figure 5 for Figure 2 Enlarged view of a portion of the image; Figure 6 for Figure 3 A magnified view of a portion of the image.

[0017] In the diagram: 1. Sliding carrier, 2. First connecting piece, 3. Carrier plate, 4. Cleaning piece, 5. One-way valve, 6. Support plate, 7. Cavity cover, 8. Anchoring clamp, 9. Fixing rod, 10. Operating piece, 11. Support piece, 12. Connecting rod, 13. Elastic element, 14. Clamping piece, 15. Second connecting piece, 16. Cylinder. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-6This utility model provides a precision positioning carrier plate technical solution for AOI inspection: it includes a sliding carrier 1, which serves as the basic support base of the overall device and provides a stable installation reference for all components above. Through its own sliding characteristics, it can drive the upper carrier plate and workpiece to the designated position for AOI inspection, realizing preliminary position adjustment. The top four corners of the sliding carrier 1 are fixed with first connecting pieces 2, which connect the sliding carrier 1 and the carrier plate 3 to ensure the coaxiality and perpendicularity between the two, avoid the carrier plate from shifting when subjected to force or vibration, provide precise installation positioning for the carrier plate 3, and ensure the flatness of the workpiece bearing surface.

[0020] The top of the first connector 2 is fixed with a carrier plate 3 for supporting the workpiece. The array of through holes at the top of the carrier plate 3 provides a basis for the workpiece to be adsorbed and fixed. By cooperating with the cavity cover, a sealed cavity is formed. The negative pressure at the through hole is used to adsorb the workpiece. At the same time, the array layout makes the adsorption force evenly distributed and prevents the workpiece from deforming. The inner wall of the through hole is slidably fitted with a cleaning component 4 for cleaning impurities at the through hole opening. The cleaning component 4 can move axially in the through hole. When the adsorption system is started or stopped or cleaning is required, the impurities at the through hole opening are scraped off by sliding up and down to avoid impurities clogging the through hole and affecting the adsorption effect. At the same time, it provides a mounting carrier for the one-way valve 5 to ensure the integrity of the airflow channel.

[0021] The inner wall of the cleaning component 4 is equipped with a one-way valve 5, which consists of a retaining ring, a wedge, a connecting rod, a resisting block, and a spring. It enables one-way airflow. During adsorption, the negative pressure causes the wedge to overcome the spring force and disengage from the retaining ring. The airflow generates adsorption force. When the airflow flows upward, the spring resets and pushes the wedge to adhere to the retaining ring, blocking the reverse flow of airflow. At this time, the airflow generates an upward force, which drives all the cleaning components 4 to slide upward through the support plate 6, thereby scraping away impurities from the through hole. The bottom end of the cleaning component 4 is fixed with the support plate 6, which connects multiple cleaning components 4 to achieve synchronous linkage of the cleaning components 4. By moving the support plate 6 as a whole, all the cleaning components 4 can be driven to clean the through hole of the carrier plate 3 at the same time, improving the cleaning efficiency.

[0022] A cavity cover 7 is provided below the support plate 6 to form a cavity, which cooperates with the carrier plate 3 to form a sealed cavity, providing the necessary sealing environment for negative pressure adsorption and airflow to lift the carrier plate 6. The bottom through hole is connected to the air pipe, and a negative pressure device is connected to the air pipe to form a stable negative pressure in the cavity. Two anti-force components are provided on two adjacent edges of the top of the sliding carrier 1. The anti-force components include anchoring blocks 8. Multiple anchoring blocks 8 are attached to two adjacent edges of the top of the sliding carrier 1, and two anchoring blocks 8 are attached to each edge. The anchoring blocks 8 are in normal condition. In this state, its two adjacent sides abut against the workpiece to achieve preliminary reference positioning of the workpiece. The bottom end of the anchoring clamp 8 is fixed with a fixing rod 9, which connects the anchoring clamp 8 and the operating component 10 to ensure that there is no relative displacement between the two. Through precise length design, the positioning surface of the anchoring clamp 8 and the edge of the sliding seat are kept at a fixed distance. The bottom end of the fixing rod 9 is fixed with an operating component 10. The center position of the operating component 10 is provided with a strip-shaped through groove that matches the connecting rod 12, so that the operating component 10 can slide along the axial direction of the connecting rod 12 and drive the anchoring clamp 8 to rotate synchronously.

[0023] A reset component is provided on one side of the bottom of the resisting component. The reset component includes a support member 11, which is fixedly connected to both sides of the operating member 10. The function of the support member 11 is to provide fixed support for the connecting rod 12, ensuring that the connecting rod 12 remains parallel to the sliding carrier 1 and ensuring the straightness of the sliding of the operating member 10. A connecting rod 12 is fixed between the two support members 11. The connecting rod 12 serves as a guide shaft for the sliding of the operating member 10 and can drive the operating member 10 to reset through the elastic element 13. The outer wall of the connecting rod 12 is sleeved with an elastic element 13. When the anchoring clamp 8 is slightly rotated by the push of the workpiece, the elastic element 13 can continuously output reset pressure to the operating member 10. After the workpiece is removed, the elastic element 13 can drive the anchoring clamp 8 to reset through the operating member 10.

[0024] Multiple clamping members 14 are provided on the top of the sliding carrier 1 and the opposing edges of multiple resisting components. Each clamping member 14 cooperates with the anchoring block 8 to form a four-way clamping of the workpiece. Driven by the cylinder, the clamping member 14 moves towards the workpiece, pressing the workpiece onto the anchoring block 8. The clamping force eliminates the gap between the workpiece and the positioning reference, achieving precise positioning. A second connecting member 15 is fixed to the bottom end of the clamping member 14. The second connecting member 15 connects the clamping member 14 to the piston rod of the cylinder 16, transmitting the force of the cylinder 16. The driving force, through precise length and installation angle design, ensures that the driving force of the cylinder 16 acts on the workpiece along the clamping direction, avoiding lateral force that could cause workpiece displacement and ensuring clamping positioning accuracy. One end of the second connecting piece 15 is fixed with the cylinder 16, which is the clamping power source. The piston rod is extended and retracted by air pressure, driving the clamping piece 14 to achieve clamping and releasing actions. The clamping force can be controlled by adjusting the air pressure to adapt to workpieces of different materials and thicknesses, avoiding excessive clamping force that could damage the workpiece or insufficient clamping force that could cause positioning loosening.

[0025] Working principle: When using a precision positioning carrier plate for AOI inspection, the workpiece is placed on the top of the carrier plate 3, and then the cylinder 16 is activated, causing the piston rod to drive the clamping member 14 to slowly contact the workpiece through the second connecting member 15, so that the workpiece contacts the anchoring clamp 8. At this time, the clamping member 14 can cooperate with the anchoring clamp 8 to clamp the workpiece. After the workpiece is clamped and stabilized, the external negative pressure instrument is activated. At this time, the negative pressure causes the wedge to overcome the spring force and disengage from the retaining ring. The airflow generates an adsorption force, which can adsorb the workpiece and form a double fixation. At this time, the workpiece can be inspected.

[0026] When the workpiece inspection is completed and the adsorption through hole needs to be cleaned, the negative pressure instrument blows out air. Due to the one-way valve's characteristic of only allowing airflow in one direction, the airflow will accumulate inside the cavity of the carrier plate 3. Then, the airflow generates upward force, which drives all the cleaning parts 4 to slide upward through the support plate 6, scraping and cleaning the adsorption through hole opening. After that, the negative pressure instrument is turned off, and the support plate 6, having lost its upward force, falls down by its own weight, causing all the cleaning parts 4 to reset. The cleaning is then complete, ready for the next adsorption of the workpiece.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision positioning carrier plate for AOI inspection, comprising a sliding carrier (1), characterized in that, The sliding carrier (1) has a first connector (2) fixed at each of its four top corners. The top of the first connector (2) is fixed with a carrier plate (3) for carrying the workpiece. The top of the carrier plate (3) has an array of through holes for adsorbing the workpiece. The inner wall of the through hole is slidably fitted with a cleaning component (4) for cleaning impurities at the through hole opening. The inner wall of the cleaning component (4) is provided with a one-way valve (5). The bottom end of the cleaning component (4) is fixed with a support plate (6). The bottom of the support plate (6) is provided with a cavity cover (7) for forming a cavity. Two opposing force-bearing components are provided on the two adjacent edges of the top of the sliding carrier (1). A reset component is provided on one side of the bottom end of the opposing force-bearing component. Multiple clamping members (14) are provided on the top of the sliding carrier (1) and the opposing edges of the multiple opposing force-bearing components. A second connecting member (15) is fixed to the bottom end of the clamping member (14). A cylinder (16) is fixed to one end of the second connecting member (15).

2. The precision positioning carrier plate for AOI inspection according to claim 1, characterized in that, The force-resisting component includes anchoring blocks (8), which are attached to two adjacent edges at the top of the sliding base (1), and each edge is attached to two anchoring blocks (8). A fixing rod (9) is fixed to the bottom end of the anchoring blocks (8), and an operating component (10) is fixed to one side of the bottom end of the fixing rod (9).

3. The precision positioning carrier plate for AOI inspection according to claim 2, characterized in that, The reset assembly includes a support member (11), which is fixedly connected to both sides of the operating member (10). A connecting rod (12) is fixed between the two support members (11), and an elastic element (13) is sleeved on the outer wall of the connecting rod (12).

4. The precision positioning carrier plate for AOI inspection according to claim 3, characterized in that, The operating component (10) has a strip-shaped through groove at its center, and a connecting rod (12) runs through the inner wall of the strip-shaped through groove, and the strip-shaped through groove matches the connecting rod (12).

5. A precision positioning carrier plate for AOI inspection according to claim 1, characterized in that, The carrier plate (3) has a groove inside that fits with the cavity cover (7), so that the inside of the carrier plate (3) forms a cavity.

6. The precision positioning carrier plate for AOI inspection according to claim 1, characterized in that, The bottom end of the cavity cover (7) is provided with a through hole, which is fixedly connected to the air pipe.

7. A precision positioning carrier plate for AOI inspection according to claim 1, characterized in that, The one-way valve (5) includes a retaining ring, which is fixed to the inner wall of the cleaning component (4). A wedge is attached to the inner wall of the retaining ring. A connecting rod is fixed to the top of the wedge. A resistance block is fixed to the top of the connecting rod. A spring is sleeved on the outer wall of the connecting rod. One end of the spring is fixedly connected to the bottom of the resistance block, and the other end is fixedly connected to the top of the retaining ring.

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