Silver paste line detection machine

Abstract

This invention discloses a silver paste line inspection machine, comprising a base, with a centering and limiting mechanism and a computer simultaneously mounted on the top of the base. The centering and limiting mechanism is divided into a scanning area and a detection area. The detection mechanism includes a first Y-axis slide rail group, a first X-axis slide rail group, and a top support frame. The first X-axis slide rail group is vertically mounted at the bottom end of the first Y-axis slide rail group, and the top support frame is mounted on the first X-axis slide rail group. A first telescopic air rod is connected to the bottom end of the top support frame. A first probe is connected to the output end of the first telescopic air rod. A display is connected to one side of a connecting frame, and the display and the first probe are simultaneously connected to a second probe via wires. The second probe is supported on the base by a support, and a slot is provided inside the second probe, with a sliding groove on one side of the slot. This invention can achieve precise scanning and detection of silver paste lines on a small area of ​​a circuit board, and can also perform precise repair of detected defects in real time.

Description

Technical Field

[0001] This invention relates to the field of silver paste wire repair technology, and more particularly to a silver paste wire testing machine. Background Technology

[0002] Silver paste circuitry is an application that utilizes conductive silver paste. As a screen printing paste, conductive silver paste not only has excellent adhesion and coverage but also extremely low resistance, significantly reducing curing temperature. It is widely used in electronic tags, membrane switches, printed circuits, and other fields. When repairing electronic products with faulty circuit boards and other components, general electronics repair shops typically use a microscope to magnify the silver paste lines on the circuit board to clearly see their distribution and damage, and then manually repair them. Because silver paste line repair requires high precision, inexperienced workers cannot complete the repair operation, and the results of manual repairs vary greatly. This can lead to low repair efficiency and compromised lifespan of the repaired electronic product. Application No. 201510153067.3 discloses an automatic silver paste line inspection machine capable of filling gaps, and application No. 201510153405.3 discloses a panoramic automatic repair silver paste line inspection machine, which achieves automatic detection and repair of silver paste lines. However, when acquiring the distribution of silver paste lines, a camera is used to capture a panoramic view, which is not suitable for the distribution of silver paste lines in small electronic products, and the clarity cannot be guaranteed. If a microscope is used to automatically acquire the distribution of silver paste lines, it will consume a lot of movement time. Summary of the Invention

[0003] The purpose of this invention is to provide a silver paste line inspection machine, which aims to solve the problem that existing silver paste line inspection machines are not suitable for the distribution of silver paste lines in small electronic products, and the clarity cannot be guaranteed. If a microscope is used to automatically obtain the distribution of silver paste lines, it will consume a lot of movement time.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a silver paste line inspection machine, comprising a base, a centering and limiting mechanism and a computer being simultaneously arranged at the top of the base, and the centering and limiting mechanism being divided into a scanning area and a detection area. A top frame is connected to one side of the base via a side bracket, and a scanning mechanism and a detection mechanism are simultaneously arranged at the bottom of the top frame. The scanning mechanism and the detection mechanism correspond to the scanning area and the detection area, respectively, and a drying mechanism is arranged between the scanning area and the detection area. The scanning mechanism includes a second Y-axis slide rail group, a second X-axis slide rail group, and a limiting support frame. The second X-axis slide rail group is vertically arranged at the bottom of the second Y-axis slide rail group, and the limiting support frame is arranged on the second X-axis slide rail group. The limiting support frame is sequentially arranged with... The device includes a servo motor, a camera, and a second telescopic pneumatic rod. The bottom end of the servo motor is connected to a gear. A fan-shaped support plate is located directly below the camera, and one end of the fan-shaped support plate has multiple locking teeth. The fan-shaped support plate meshes with the gear through the multiple locking teeth, and the fan-shaped support plate is movably connected to the bottom end of the limiting support frame via a support shaft. A second high-magnification lens and a low-magnification lens are also provided on the fan-shaped support plate. A grouting pen is connected to the bottom end of the second telescopic pneumatic rod. The scanning mechanism also includes a light strip and a light strip switch, and the light strip and the light strip switch are connected and simultaneously set on the centering limiting mechanism. A first arc-shaped sensing plate is provided on the top of the fan-shaped support plate on one side of the second high-magnification lens, and a second arc-shaped sensing plate is provided on one side of the outer wall of the camera. The detection mechanism includes a first Y-axis slide rail group, a first X-axis slide rail group, and a top support frame. The first X-axis slide rail group is vertically arranged at the bottom end of the first Y-axis slide rail group, and the top support frame is arranged on the first X-axis slide rail group. The bottom end of the top support frame is connected to a first telescopic air rod. The output end of the first telescopic air rod is connected to a first probe, and one side of the first telescopic air rod is connected to a first high-power lens via a connecting bracket. The magnification of the first high-power lens is less than that of the second high-power lens. A display is connected to one side of the connecting frame, and the display and the first probe are simultaneously connected to the second probe via wires. The second probe is supported on the base by a support. A slot is provided inside the second probe, and a sliding groove is provided on one side of the slot. When the scanning mechanism automatically scans the silver paste lines on the circuit board fixed on the centering and limiting mechanism, the camera first obtains the overall distribution of the silver paste lines on the surface of the circuit board and transmits the overall image to the computer. After the detection range is determined on the computer, the camera is moved to the corresponding detection range under the action of the second Y-axis slide rail group and the second X-axis slide rail group. Then, the servo motor drives the gear to rotate, thereby driving the fan-shaped support plate to move, switching the area below the camera to the second high-magnification lens to magnify the area where the abnormal position is located. When the camera is switched to the second high-magnification lens, the first arc surface sensor and the second arc surface sensor contact each other.

[0005] The following are further improvements to the above technical solution: 1. In the above scheme, a first spring, a compression sleeve and a marker refill are connected sequentially from top to bottom in the empty slot. A lever is fixedly connected to one outer wall of the compression sleeve, and the lever passes through the slide groove. The air drying mechanism includes a C-shaped support frame, and multiple ventilation holes are arranged at equal density on the C-shaped support frame. A guide fan is arranged in each ventilation hole.

[0006] 2. In the above scheme, the centering and limiting mechanism includes an X-axis bidirectional lead screw assembly, two L-shaped limiting plates and a first Y-axis bidirectional lead screw assembly, and the X-axis bidirectional lead screw assembly is fixed at the bottom end of the top frame, the two L-shaped limiting plates are symmetrically connected to the X-axis bidirectional lead screw assembly, and a transverse support plate is fixedly connected to the X-axis bidirectional lead screw assembly.

[0007] 3. In the above scheme, multiple limiting grooves are provided at equal density on the transverse support plate, and multiple limiting holes are provided at equal density on the L-shaped limiting plate and the vertical surface of the transverse support plate. A vertical support plate is vertically and movably connected to the top of the transverse support plate.

[0008] 4. In the above scheme, the bottom end of the vertical support plate is provided with multiple rollers at equal density, and the multiple rollers correspond to and pass through the limiting slide groove respectively. The L-shaped limiting plate is connected to the vertical support plate through multiple second springs, and multiple limiting rods are symmetrically fixed on one side of the vertical support plate.

[0009] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: This invention relates to a silver paste line inspection machine, which can accurately scan and inspect silver paste lines on a small area of ​​a circuit board, and can also immediately and accurately repair detected defects, improving the efficiency of inspection and repair, and ensuring the repair effect. Furthermore, it can also perform electrical performance testing on the repaired circuit board and mark the unqualified points to avoid failure due to internal voids caused by repair, and also facilitate secondary repair. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of the silver paste line testing machine proposed in this invention.

[0011] Figure 2 This is a schematic diagram of the overall internal structure of the top frame of the silver paste line testing machine proposed in this invention.

[0012] Figure 3 This is a schematic diagram of the scanning mechanism of the silver paste line detection machine proposed in this invention.

[0013] Figure 4 This is a schematic diagram of the detection mechanism of the silver paste line detection machine proposed in this invention.

[0014] Figure 5 This is a cross-sectional view of the second probe of the silver paste line testing machine proposed in this invention.

[0015] Figure 6 This is a schematic diagram showing the disassembled structure of the drying mechanism of the silver paste line testing machine proposed in this invention.

[0016] Figure 7 This is a schematic diagram of the overall structure of the centering and limiting mechanism of the silver paste line testing machine proposed in this invention.

[0017] Figure 8 This is a schematic diagram of the upper disassembled structure of the centering and limiting mechanism of the silver paste line testing machine of the present invention.

[0018] Figure 9 This is a schematic diagram of the lower disassembled structure of the centering and limiting mechanism of the silver paste line testing machine of the present invention.

[0019] In the attached diagrams: 1. Detection mechanism; 2. Drying mechanism; 3. Top frame; 4. Scanning mechanism; 5. Centering and limiting mechanism; 6. Base; 7. Computer; 8. Side support; 101. First Y-axis slide rail assembly; 102. First X-axis slide rail assembly; 103. Top support frame; 104. First telescopic air rod; 105. Connecting frame; 106. First probe; 107. First high-power lens; 108. Monitor; 109. Wire; 110. Second probe; 111. Support; 112. Empty slot; 113. First spring; 114. Pulley; 115. Slide groove; 116. Extrusion sleeve; 117. Marker refill; 201. C-shaped support frame; 202. Vent hole; 203. Guide fan; 401. Second Y-axis slide rail assembly; 402. Second X-axis slide rail assembly; 403. Limiting support frame; 404. Servo 405. Gear; 406. First arc-shaped sensor plate; 407. Fan-shaped support plate; 408. Second high-magnification lens; 409. Low-magnification lens; 410. Second arc-shaped sensor plate; 411. Grouting pen; 412. Clamping tooth; 413. Support shaft; 414. Second telescopic air rod; 415. Camera; 416. LED strip; 417. LED strip switch; 501. X-axis bidirectional lead screw assembly; 502. L-shaped limiting plate; 503, limiting rod; 504, vertical support plate; 505, clamping block; 506, roller; 507, second spring; 508, first sensing block; 509, horizontal support plate; 510, limiting slide groove; 511, processor; 512, second sensing block; 513, centering support; 514, first Y-axis bidirectional lead screw assembly; 515, second Y-axis lead screw assembly; 516, limiting hole. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1: A silver paste line inspection machine includes a base 6. A centering and limiting mechanism 5 and a computer 7 are simultaneously arranged at the top of the base 6. The centering and limiting mechanism 5 is divided into a scanning area and a detection area. A top frame 3 is connected to one side of the base 6 via a side bracket 8. A scanning mechanism 4 and a detection mechanism 1 are simultaneously arranged at the bottom of the top frame 3. The scanning mechanism 4 and the detection mechanism 1 correspond to the scanning area and the detection area, respectively. A drying mechanism 2 is arranged between the scanning area and the detection area. The scanning mechanism 4 includes a second Y-axis slide rail group 401, a second X-axis slide rail group 402, and a limiting support 403. The second X-axis slide rail group 402 is vertically arranged at the bottom of the second Y-axis slide rail group 401, and the limiting support 403 is arranged on the second X-axis slide rail group 402. A servo motor 404, a camera 415, and a second telescopic air rod 414 are sequentially arranged on the limiting support 403. The bottom end of 04 is connected to a gear 405. A fan-shaped support plate 407 is provided directly below the camera 415. One end of the fan-shaped support plate 407 is provided with multiple teeth 412. The fan-shaped support plate 407 meshes with the gear 405 through the multiple teeth 412. The fan-shaped support plate 407 is movably connected to the bottom end of the limiting support frame 403 through a support shaft 413. A second high-magnification lens 408 and a low-magnification lens 409 are provided on the fan-shaped support plate 407. The bottom end of the second telescopic air rod 414 is connected to a grouting pen 411. The scanning mechanism 4 also includes a light strip 416 and a light strip switch 417. The light strip 416 and the light strip switch 417 are connected and are simultaneously provided on the centering limiting mechanism 5. The top end of the fan-shaped support plate 407 is provided with a first arc-shaped sensing plate 406 on one side of the second high-magnification lens 408. A second arc-shaped sensing plate 410 is provided on one side of the outer wall of the camera 415. The detection mechanism 1 includes a first Y-axis slide rail group 101, a first X-axis slide rail group 102, and a top support frame 103. The first X-axis slide rail group 102 is vertically arranged at the bottom end of the first Y-axis slide rail group 101, and the top support frame 103 is arranged on the first X-axis slide rail group 102. The bottom end of the top support frame 103 is connected to a first telescopic air rod 104. The output end of the first telescopic air rod 104 is connected to the first probe 106, and one side of the first telescopic air rod 104 is connected to the first high magnification lens 107 through the connecting bracket 105. The magnification of the first high magnification lens 107 is less than that of the second high magnification lens 408. The display 108 is connected to one side of the connecting bracket 105, and the display 108 and the first probe 106 are connected to the second probe 110 through the wire 109. The second probe 110 is supported on the base 6 by the support 111. The second probe 110 is provided with a hollow groove 112, and a sliding groove 115 is provided on one side of the hollow groove 112. When the scanning mechanism 4 automatically scans the silver paste lines on the circuit board fixed on the centering and limiting mechanism 5, firstly, the camera 415 obtains the overall distribution of the silver paste lines on the surface of the circuit board through the low magnification lens 409, and transmits the overall image to the computer 7. After the detection range is determined on the computer 7, the camera 415 is moved to the corresponding detection range under the action of the second Y-axis slide rail group 401 and the second X-axis slide rail group 402. Then, under the action of the servo motor 404, the gear 405 is driven to rotate, thereby driving the fan-shaped support plate 407 to move, and the area below the camera 415 is switched to the second high magnification lens 408 to magnify the area where the abnormal position is located. When the second high magnification lens 408 is used, the first arc surface sensing plate 406 and the second arc surface sensing plate 410 come into contact.

[0022] The above-mentioned slot 112 is connected in sequence from top to bottom to a first spring 113, a compression sleeve 116 and a marker refill 117. A lever 114 is fixedly connected to one outer wall of the compression sleeve 116 and passes through the slide groove 115. The air drying mechanism 2 includes a C-shaped support 201 and multiple ventilation holes 202 are arranged at equal density on the C-shaped support 201. A guide fan 203 is arranged in each ventilation hole 202.

[0023] Example 2: A silver paste line inspection machine includes a base 6. A centering and limiting mechanism 5 and a computer 7 are simultaneously arranged at the top of the base 6. The centering and limiting mechanism 5 is divided into a scanning area and a detection area. A top frame 3 is connected to one side of the base 6 via a side bracket 8. A scanning mechanism 4 and a detection mechanism 1 are simultaneously arranged at the bottom of the top frame 3. The scanning mechanism 4 and the detection mechanism 1 correspond to the scanning area and the detection area, respectively. A drying mechanism 2 is arranged between the scanning area and the detection area. The scanning mechanism 4 includes a second Y-axis slide rail group 401, a second X-axis slide rail group 402, and a limiting support 403. The second X-axis slide rail group 402 is vertically arranged at the bottom of the second Y-axis slide rail group 401, and the limiting support 403 is arranged on the second X-axis slide rail group 402. A servo motor 404, a camera 415, and a second telescopic air rod 414 are sequentially arranged on the limiting support 403. The bottom end of 04 is connected to a gear 405. A fan-shaped support plate 407 is provided directly below the camera 415. One end of the fan-shaped support plate 407 is provided with multiple teeth 412. The fan-shaped support plate 407 meshes with the gear 405 through the multiple teeth 412. The fan-shaped support plate 407 is movably connected to the bottom end of the limiting support frame 403 through a support shaft 413. A second high-magnification lens 408 and a low-magnification lens 409 are provided on the fan-shaped support plate 407. The bottom end of the second telescopic air rod 414 is connected to a grouting pen 411. The scanning mechanism 4 also includes a light strip 416 and a light strip switch 417. The light strip 416 and the light strip switch 417 are connected and are simultaneously provided on the centering limiting mechanism 5. The top end of the fan-shaped support plate 407 is provided with a first arc-shaped sensing plate 406 on one side of the second high-magnification lens 408. A second arc-shaped sensing plate 410 is provided on one side of the outer wall of the camera 415. The detection mechanism 1 includes a first Y-axis slide rail group 101, a first X-axis slide rail group 102, and a top support frame 103. The first X-axis slide rail group 102 is vertically arranged at the bottom end of the first Y-axis slide rail group 101, and the top support frame 103 is arranged on the first X-axis slide rail group 102. The bottom end of the top support frame 103 is connected to a first telescopic air rod 104. The output end of the first telescopic air rod 104 is connected to the first probe 106, and one side of the first telescopic air rod 104 is connected to the first high magnification lens 107 through the connecting bracket 105. The magnification of the first high magnification lens 107 is less than that of the second high magnification lens 408. The display 108 is connected to one side of the connecting bracket 105, and the display 108 and the first probe 106 are connected to the second probe 110 through the wire 109. The second probe 110 is supported on the base 6 by the support 111. The second probe 110 is provided with a hollow groove 112, and a sliding groove 115 is provided on one side of the hollow groove 112. When the scanning mechanism 4 automatically scans the silver paste lines on the circuit board fixed on the centering and limiting mechanism 5, firstly, the camera 415 obtains the overall distribution of the silver paste lines on the surface of the circuit board through the low magnification lens 409, and transmits the overall image to the computer 7. After the detection range is determined on the computer 7, the camera 415 is moved to the corresponding detection range under the action of the second Y-axis slide rail group 401 and the second X-axis slide rail group 402. Then, under the action of the servo motor 404, the gear 405 is driven to rotate, thereby driving the fan-shaped support plate 407 to move, and the area below the camera 415 is switched to the second high magnification lens 408 to magnify the area where the abnormal position is located. When the second high magnification lens 408 is used, the first arc surface sensing plate 406 and the second arc surface sensing plate 410 come into contact.

[0024] The aforementioned centering and limiting mechanism 5 includes an X-axis bidirectional lead screw assembly 501, two L-shaped limiting plates 502, and a first Y-axis bidirectional lead screw assembly 514. The X-axis bidirectional lead screw assembly 501 is fixed to the bottom end of the top frame 3. The two L-shaped limiting plates 502 are symmetrically connected to the X-axis bidirectional lead screw assembly 501, and a transverse support plate 509 is fixedly connected to the X-axis bidirectional lead screw assembly 501.

[0025] The aforementioned transverse support plate 509 is provided with multiple limiting grooves 510 at equal density, and the L-shaped limiting plate 502 is provided with multiple limiting holes 516 at equal density on the vertical surface of the transverse support plate 509. The top end of the transverse support plate 509 is vertically and movably connected to a vertical support plate 504.

[0026] The bottom end of the vertical support plate 504 is provided with multiple rollers 506 at equal density, and the multiple rollers 506 correspond to and pass through the limiting slide groove 510 respectively. The L-shaped limiting plate 502 is connected to the vertical support plate 504 through multiple second springs 507, and multiple limiting rods 503 are symmetrically fixed on one side of the vertical support plate 504.

[0027] Working principle: When the scanning mechanism 4 automatically scans the silver paste lines on the circuit board fixed on the centering and limiting mechanism 5, firstly, the camera 415 obtains the overall distribution of the silver paste lines on the circuit board on the centering and limiting mechanism 5 through the low magnification lens 409, and the computer 7 obtains the overall image; when an abnormal position is observed, after the detection range is determined on the computer 7, it moves into the range under the action of the second Y-axis slide rail group 401 and the second X-axis slide rail group 402, and then drives the gear 405 to rotate under the action of the servo motor 404, which in turn drives the fan-shaped support plate 407 to move. Then, the second high magnification lens 408 is used to magnify the selected area, thereby obtaining detailed damage information. It is suitable for use on small circuit boards and also facilitates the injection pen 411 to achieve precise repair, enhance repair efficiency, and optimize repair effect. In addition, under the action of the light strip 416, when it is transferred to the second high magnification lens 408 for use, the first curved surface sensor 406 and the second curved surface sensor 410 come into contact. After processing, a signal is sent to the light strip switch 417 to control the light strip 416 to turn on, thereby compensating for the deficiency of insufficient light when the second high magnification lens 408 is used and ensuring the detection effect. When the circuit board moves along the centering and limiting mechanism 5, it can be transferred from the scanning area to the detection area. Simultaneously, the scanning mechanism 4 moves along the same path. Under the action of the drying mechanism 2, the silver paste line is quickly dried. Under the action of the first Y-axis slide rail group 101 and the first X-axis slide rail group 102, the first probe 106 is simultaneously driven to contact the detection point at the repair position. The first high-power lens 107 continuously monitors the surrounding environment of the detection point and displays it on the computer 7. Then, the second probe 110 is held and made to contact the silver paste line around the detection point. The resistance value is displayed on the display 108, thereby realizing the rapid measurement of the circuit board repair status and ensuring the repair effect of the circuit board. Furthermore, the toggle block 114 can drive the marker pen core 117 to mark the defect location in real time. Under the action of the first spring 113, the marker pen core 117 can be driven back to its original position, which can be used to quickly mark the damaged location using the first high magnification lens 107, making it easier to quickly locate the secondary scan repair. Subsequently, when clamping the circuit board, firstly, the circuit board is placed on the upper surface of the centering support 513. Then, under the action of the X-axis bidirectional lead screw assembly 501, the L-shaped limiting plates 502 on both sides move inward, so that the rollers 506 clamp the opposite sides of the circuit board, and after contact, they drive the second spring 507 to squeeze. When the first sensing block 508 and the second sensing block 512 on both sides simultaneously contact and send a command to the processor 511, the X-axis bidirectional lead screw assembly 501 stops moving. Then, the first Y-axis bidirectional lead screw assembly 514 is activated to drive the clamping block 505 to clamp inward, thereby completing the centering and clamping operation of the circuit board. While adapting to circuit boards of different specifications, it also limits the center point, which is convenient for the path planning of the detection mechanism 1. Under the action of the second Y-axis lead screw assembly 515 and the roller 506, the circuit board can be smoothly and quickly moved to the detection area. When it is moved to the top of the second Y-axis lead screw assembly 515, it is exactly located in the center of the detection area, which also makes it convenient for the detection mechanism 1 to achieve rapid positioning when scanning the movement trajectory of the mechanism 4, thereby improving work efficiency.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A silver paste line inspection machine, comprising a base (6), characterized in that: The top of the base (6) is simultaneously provided with a centering and limiting mechanism (5) and a computer (7), and the centering and limiting mechanism (5) is divided into a scanning area and a detection area. One side of the base (6) is connected to a top frame (3) through a side bracket (8), and the bottom of the top frame (3) is simultaneously provided with a scanning mechanism (4) and a detection mechanism (1). The scanning mechanism (4) and the detection mechanism (1) correspond to the scanning area and the detection area, respectively, and a drying mechanism (2) is provided between the scanning area and the detection area. The system includes a second Y-axis slide rail assembly (401), a second X-axis slide rail assembly (402), and a limiting support (403). The second X-axis slide rail assembly (402) is vertically arranged at the bottom end of the second Y-axis slide rail assembly (401), and the limiting support (403) is arranged on the second X-axis slide rail assembly (402). A servo motor (404), a camera (415), and a second telescopic air rod (414) are sequentially arranged on the limiting support (403). The bottom end of the servo motor (404) is connected to a gear. 405), a fan-shaped support plate (407) is provided directly below the camera (415), and one end of the fan-shaped support plate (407) is provided with multiple teeth (412). The fan-shaped support plate (407) meshes with the gear (405) through the multiple teeth (412), and the fan-shaped support plate (407) is movably connected to the bottom end of the limiting support frame (403) through the support shaft (413). A second high-power lens (408) and a low-power lens (409) are also provided on the fan-shaped support plate (407). The bottom end of the two telescopic air rods (414) is connected to a grouting pen (411). The scanning mechanism (4) also includes a light strip (416) and a light strip switch (417). The light strip (416) and the light strip switch (417) are connected and simultaneously set on the centering and limiting mechanism (5). The top of the fan-shaped support plate (407) is located on one side of the second high magnification lens (408) and a first arc surface sensing plate (406) is provided. The outer wall of one side of the camera (415) is simultaneously provided with a second arc surface sensing plate (410). The detection mechanism (1) includes a first Y-axis slide rail group (101), a first X-axis slide rail group (102), and a top support frame (103). The first X-axis slide rail group (102) is vertically arranged at the bottom end of the first Y-axis slide rail group (101), and the top support frame (103) is arranged on the first X-axis slide rail group (102). The bottom end of the top support frame (103) is connected to a first telescopic air rod (104). The output end of the first telescopic air rod (104) is connected to the first probe (106), and one side of the first telescopic air rod (104) is connected to the first high magnification lens (107) through the connecting bracket (105). The magnification of the first high magnification lens (107) is less than that of the second high magnification lens (408). A display (108) is connected to one side of the connecting bracket (105), and the display (108) and the first probe (106) are connected to the second probe (110) through wires (109). The second probe (110) is supported on the base (6) by a support (111). The second probe (110) has a slot (112) inside, and a sliding groove (115) is provided on one side of the slot (112). When the scanning mechanism (4) automatically scans the silver paste lines on the circuit board fixed on the centering and limiting mechanism (5), firstly, the camera (415) obtains the overall distribution of the silver paste lines on the surface of the circuit board through the low magnification lens (409) and transmits the obtained overall image to the computer (7). After the detection range is determined on the computer (7), the camera (415) is moved to the corresponding detection range under the action of the second Y-axis slide rail group (401) and the second X-axis slide rail group (402). Then, under the action of the servo motor (404), the gear (405) is driven to rotate, thereby driving the fan-shaped support plate (407) to move, and the camera (415) is switched to the second high magnification lens (408) to magnify the area where the abnormal position is located. When the second high magnification lens (408) is used, the first arc surface sensing plate (406) and the second arc surface sensing plate (410) come into contact.

2. The silver paste line testing machine according to claim 1, characterized in that: The first spring (113), the compression sleeve (116) and the marker refill (117) are connected sequentially from top to bottom in the slot (112). A lever (114) is fixedly connected to one side of the outer wall of the compression sleeve (116), and the lever (114) passes through the slide groove (115). The air drying mechanism (2) includes a C-shaped support (201), and multiple ventilation holes (202) are arranged at equal density on the C-shaped support (201). A guide fan (203) is arranged in each ventilation hole (202).

3. The silver paste line testing machine according to claim 1, characterized in that: The centering and limiting mechanism (5) includes an X-axis bidirectional lead screw assembly (501), two L-shaped limiting plates (502) and a first Y-axis bidirectional lead screw assembly (514). The X-axis bidirectional lead screw assembly (501) is fixed at the bottom of the top frame (3). The two L-shaped limiting plates (502) are symmetrically connected to the X-axis bidirectional lead screw assembly (501). A transverse support plate (509) is fixedly connected to the X-axis bidirectional lead screw assembly (501).

4. The silver paste line testing machine according to claim 3, characterized in that: The transverse support plate (509) is provided with multiple limiting grooves (510) at equal density, and the L-shaped limiting plate (502) is provided with multiple limiting holes (516) at equal density on the vertical surface of the transverse support plate (509). The top of the transverse support plate (509) is vertically and movably connected to a vertical support plate (504).

5. The silver paste line testing machine according to claim 4, characterized in that: The bottom end of the vertical support plate (504) is provided with multiple rollers (506) at equal density, and the multiple rollers (506) correspond to and pass through the limiting slide groove (510). The L-shaped limiting plate (502) is connected to the vertical support plate (504) through multiple second springs (507), and multiple limiting rods (503) are symmetrically fixed on one side of the vertical support plate (504).

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