A support mechanism to solve the problem of PCBA deformation after reflow affecting AOI testing.

Abstract

This utility model discloses a support mechanism to solve the problem of PCBA deformation affecting AOI testing. It includes a lifting mechanism located directly below the PCBA testing position between two PCBA transport tracks within the AOI testing equipment. The lifting mechanism is mounted on the base plate of the AOI testing equipment via a mounting bracket. A support plate is vertically connected to the top of the lifting mechanism, and a silicone pad is laid flat on the support plate. Several silicone heads supporting the PCBA board are distributed on the silicone pad, with rounded upper ends. It also includes a PCBA positioning sensor connected to the drive circuit of the lifting mechanism. The silicone heads of this mechanism support the PCBA board, and in conjunction with the two PCBA transport tracks and the two pressure blocks above them, reduce the deformation of the PCBA board, improve the testing accuracy of AOI, and reduce false alarms. The silicone heads make point contact with the PCBA board, resulting in a small contact area and reducing damage to the PCBA board.

Description

Technical Field

[0001] This utility model relates to the field of PCBA testing technology, and in particular to a support mechanism that solves the problem of PCBA deformation after reflow affecting AOI testing. Background Technology

[0002] In SMT production, PCBA boards undergo AOI (Automated Optical Inspection) after reflow oven operation to check the soldering and appearance quality. During reflow, the two edges of the PCBA board are positioned on two separate PCBA transport tracks, making it prone to deformation and concavity in the middle. In the AOI inspection equipment, after the two edges are transported to the inspection position, they are pressed firmly against the tracks by two pressure blocks. Performing AOI inspection on a deformed PCBA board results in a high false alarm rate and affects the testing accuracy. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a support mechanism that solves the problem of PCBA deformation affecting AOI testing after reflow, so as to solve the technical problems mentioned in the background art.

[0004] The objective of this utility model is achieved through the following technical solution: A support mechanism for addressing the impact of PCBA deformation after reflow on AOI testing includes a lifting mechanism located directly below the PCBA inspection position between two PCBA transport tracks within the AOI inspection equipment. The lifting mechanism is mounted on the base plate of the AOI inspection equipment via a mounting bracket. A support plate is vertically connected to the top of the lifting mechanism, and a silicone pad is laid flat on the support plate. Several silicone heads supporting the PCBA are distributed on the silicone pad, with rounded upper ends. The mechanism also includes a PCBA positioning sensor connected to the drive circuit of the lifting mechanism.

[0005] Furthermore, the mounting frame includes two horizontal mounting blocks, one vertical mounting block, and a fixing block. The two horizontal mounting blocks are perpendicular to the PCBA conveying track and fixed to the base plate of the AOI inspection equipment. The two ends of the vertical mounting block are respectively provided with oblong holes along its width direction. The two ends of the vertical mounting block are respectively connected to the two horizontal mounting blocks through the oblong holes by fasteners. The two ends of the fixing block are respectively provided with oblong holes along its length direction. The fixing block is stacked on the vertical mounting block. The two ends of the fixing block are respectively connected to the vertical mounting block through the oblong holes by fasteners. A fixing plate is vertically provided on the fixing block. The fixing plate is vertically provided with oblong holes. The lifting mechanism is connected to the fixing plate through the oblong holes on the fixing plate by fasteners.

[0006] Furthermore, the lifting mechanism is a cylinder.

[0007] The beneficial effects of this utility model are: The support mechanism proposed in this invention addresses the impact of PCBA deformation on AOI testing. During AOI inspection of the PCBA board, when the PCBA board reaches the inspection position, the PCBA positioning sensor transmits a signal to the drive circuit of the lifting mechanism. The lifting mechanism rises, carrying the support plate and silicone pad. Several silicone heads support the PCBA board, and in conjunction with two PCBA conveying tracks and two pressure blocks above them, the deformation of the PCBA board is reduced, the AOI testing accuracy is improved, and false alarms in AOI testing are reduced. The silicone heads make point contact with the PCBA board, resulting in a small contact area and reducing damage to the PCBA board.

[0008] The mounting frame, which includes horizontal mounting blocks, vertical mounting blocks, fixing blocks, and fixing plates, is used to install the lifting mechanism, enabling horizontal, vertical, and height adjustments.

[0009] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings, wherein: Figure 1 This is a perspective view of the present utility model.

[0011] Figure 2 This is a perspective view of the present invention from another angle.

[0012] In the diagram: 1. Lifting mechanism; 2. PCBA conveying track; 3. Mounting frame; 4. AOI inspection equipment base plate; 5. Horizontal mounting block; 6. Vertical mounting block; 7. Fixing block; 8. Waist-shaped hole; 9. Fastener; 10. Fixing plate; 11. Support plate; 12. Silicone pad; 13. Silicone head; 14. Pressure block. Detailed Implementation

[0013] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0014] like Figure 1-2The support mechanism shown addresses the impact of PCBA deformation after reflow on AOI testing. It includes a lifting mechanism 1. Various technologies exist for the lifting mechanism 1, such as pneumatic cylinders, hydraulic cylinders, and electric telescopic rods. The lifting mechanism 1 is located directly below the PCBA inspection position between the two PCBA transport tracks 2 within the AOI inspection equipment. The lifting mechanism 1 is mounted on the AOI inspection equipment base plate 4 via a mounting bracket 3. Various structures exist for the mounting bracket 3, such as two transverse mounting blocks 5, one longitudinal mounting block 6, and a fixing block 7. The two transverse mounting blocks 5 are perpendicular to the PCBA transport tracks 2 and fixed to the AOI inspection equipment base plate 4. The longitudinal mounting block 6 has oblong holes 8 at both ends along its width direction. Fasteners 9 are connected to two transverse mounting blocks 5 through their oblong holes 8. Fasteners 9 include bolts and washers that are threaded to the transverse mounting blocks 5. Fixed blocks 7 have oblong holes 8 at both ends along their length. Fixed blocks 7 are stacked on longitudinal mounting blocks 6. Both ends of fixed blocks 7 are connected to longitudinal mounting blocks 6 through their oblong holes 8 through fasteners 9. Fasteners 9 include bolts and washers that are threaded to the longitudinal mounting blocks 6. Fixed plates 10 are vertically mounted on fixed blocks 7. Fixed plates 10 have oblong holes 8 vertically mounted on them. Lifting mechanisms 1 are connected to fixed plates 10 through their oblong holes 8 through fasteners 9. Fasteners 9 include bolts and washers that are threaded to the lifting mechanisms. Such mounting brackets 3 can realize the adjustment of the lateral position, longitudinal position, and height of lifting mechanisms 1. A support plate 11 is vertically connected to the top of the lifting mechanism 1. A silicone pad 12 is laid flat on the support plate 11. Several silicone heads 13 are distributed on the silicone pad 12. The silicone heads 13 support the PCBA board located at the PCBA detection position (the two sides of the PCBA board at the PCBA detection position are pressed against the two PCBA tracks 2 by two pressure blocks 14 respectively. In this utility model, the two pressure blocks 14 and the two PCBA conveying tracks 2 are the structures that are built into the existing AOI detection equipment). The silicone head 13 is columnar and its upper end is round. It also includes a PCBA position sensor, which is connected to the drive circuit of the lifting mechanism.

[0015] During AOI inspection of the PCBA board, when the PCBA board reaches the inspection position, two pressure blocks 14 above the two PCBA tracks 2 descend, pressing the two side edges of the PCBA board firmly onto the two PCBA tracks 2 respectively. Simultaneously, the PCBA positioning sensor transmits a signal to the drive circuit of the lifting mechanism 1, causing the lifting mechanism 1 to rise, carrying the support plate 11 and silicone pad 12. Several silicone heads 14 support the PCBA board (the lifting height of the lifting mechanism 1 is designed to keep the PCBA board as horizontal as possible), reducing the deformation of the PCBA board, improving the testing accuracy of AOI, and reducing false alarms. The silicone heads 13 make point contact with the PCBA board, which, compared to the silicone pad supporting the PCBA board, reduces the contact area and minimizes damage to the PCBA board. After inspection, the lifting mechanism descends, and the PCBA board is conveyed away.

[0016] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A support mechanism for solving the deformation of a PCBA after being baked in an oven affecting AOI testing, characterized in that: It includes a lifting mechanism (1), which is located directly below the PCBA inspection position between two PCBA conveying tracks (2) inside the AOI inspection equipment. The lifting mechanism (1) is installed on the base plate (4) of the AOI inspection equipment via a mounting bracket (3). A support plate (11) is vertically connected to the top of the lifting mechanism (1). A silicone pad (12) is laid flat on the support plate (11). Several silicone heads (13) supporting PCBA boards are distributed on the silicone pad (12). The upper end of the silicone head (13) is round. It also includes a PCBA positioning sensor, which is connected to the drive circuit of the lifting mechanism (1).

2. The support mechanism for solving the deformation of the PCBA after the furnace affecting the AOI test according to claim 1, characterized in that: The mounting bracket (3) includes two horizontal mounting blocks (5), one vertical mounting block (6), and a fixing block (7). The two horizontal mounting blocks (5) are perpendicular to the PCBA conveying track (2) and fixed on the AOI inspection equipment base plate (4). The two ends of the vertical mounting block (6) are respectively provided with waist-shaped holes (8) along its width direction. The two ends of the vertical mounting block (6) are respectively connected to the two horizontal mounting blocks (5) through the waist-shaped holes (8) by fasteners (9). The two ends of the fixing block (7) are respectively provided with waist-shaped holes (8) along its width direction. The fixing block (7) is stacked on the longitudinal mounting block (6) with waist-shaped holes (8) provided along its length direction. Both ends of the fixing block (7) are connected to the longitudinal mounting block (6) through the waist-shaped holes (8) by fasteners (9). The fixing block (7) is vertically provided with a fixing plate (10). The fixing plate (10) is vertically provided with waist-shaped holes (8). The lifting mechanism (1) is connected to the fixing plate (10) through the waist-shaped holes (8) on the fixing plate (10) by fasteners (9).

3. The support mechanism for resolving the impact of PCBA deformation on AOI testing after reflow oven reflow, as described in claim 1 or 2, is characterized in that: The lifting mechanism (1) is a cylinder.

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