Automatic dotting device of a testing machine and dotting method thereof

Abstract

The application discloses a kind of test machine automatic dotting device and its dotting method, including base and detection camera, it is characterized in that, the outer wall of base is provided with protective casing, and the two sides of protective casing are provided with movable machine cover, the upper end of base is provided with positioning baffle on both sides, the corresponding position of two positioning baffles is provided with sliding guide, two sliding guides are slidably connected with horizontal rack, and the top of horizontal rack is provided with horizontal driving structure.The application relates to the technical field of circuit board dotting equipment.The automatic dotting device of the test machine and its dotting method detect the circuit board by the detection camera to distinguish between good and bad products, determine the dotting position by the detection camera, and move the sliding sleeve downward by the controller to control the air pressure rod, dot on the surface of the circuit board, which can effectively improve the accuracy of dotting compared with manual dotting.

Description

Technical Field

[0001] This invention relates to the field of circuit board marking equipment technology, and more specifically, to an automatic marking device for a testing machine and its marking method. Background Technology

[0002] Marking on a circuit board means marking the position of each component and the soldering point on the circuit board. A circuit board is also called a circuit board. The difficulty of the process and the processing price are determined by the number of wiring surfaces. Ordinary circuit boards are divided into single-sided wiring and double-sided wiring, commonly known as single-sided boards and double-sided boards.

[0003] During the production of circuit boards, there is a certain possibility of defective products, such as missing corners or broken wires. Therefore, it is necessary to distinguish between defective and good circuit boards during the production process to prevent defective products from entering the next process and causing components to be soldered onto them, resulting in component waste.

[0004] In the existing technology, the inspection of defective circuit boards is mostly done manually. Good and defective products are distinguished by observing the shape of the circuit board and marking them to facilitate the differentiation in subsequent processes. However, this method is inefficient and often fails to meet production needs. Moreover, the marking positions generally have large deviations, making it difficult to distinguish the marked areas in subsequent processes.

[0005] Therefore, those skilled in the art have provided an automatic dotting device and dotting method for a testing machine to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic marking device and marking method for a testing machine, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0009] An automatic marking device for a testing machine includes a base and a detection camera. The base has a protective housing on its outer periphery, with movable covers on both sides of the protective housing. Positioning baffles are provided on both sides of the upper end of the base. Sliding guide rails are provided at corresponding positions on the two positioning baffles. A transverse frame is slidably connected to the two sliding guide rails. A transverse drive structure is provided at the top of the transverse frame. A transverse guide rail is provided on one side of the transverse frame. A longitudinal frame is slidably connected to the outer periphery of the transverse guide rail. A longitudinal drive structure is provided at the top of the longitudinal frame. A marking structure is provided on the side wall of the longitudinal frame. A test mounting platform is provided on the top surface of the base, located between the two positioning baffles.

[0010] The test installation platform includes two positioning slides, which are arranged opposite each other. A sliding frame is fixed to the top of the positioning slides by bolts. An electric sliding support plate is set inside the sliding frame, and a limit plate is fixedly connected to the upper end of the electric sliding support plate. Loading and unloading structures are set at both ends of the positioning slides, and an adjustment structure is set between the two positioning slides.

[0011] The dotting structure includes a pneumatic rod and a sliding sleeve. The pneumatic rod is fixedly installed at the bottom end of the longitudinal frame, and the sliding sleeve is slidably installed on the side wall of the longitudinal frame. The side wall of the sliding sleeve has a sliding sleeve positioning groove, and the inside of the sliding sleeve positioning groove is provided with a guide block that is fixedly connected to the longitudinal frame. The bottom ends of the pneumatic rod and the sliding sleeve are connected to a mounting plate, and the mounting plate and the bottom end of the sliding sleeve are provided with an insertion hole. The sliding sleeve has a dotting ink cartridge inside, and the detection camera is fixedly installed on one side of the mounting plate.

[0012] Furthermore, the dotting ink cartridge includes a circular sleeve with two bearing cavities inside. The bottom end of the circular sleeve is provided with a sleeve head that mates with the insertion hole, and the bottom end of the sleeve head is provided with two ink dotting heads that correspond to the two bearing cavities respectively. The top end of the circular sleeve is provided with an inkjet pump.

[0013] Furthermore, the two ends of the transverse frame are provided with guide rail grooves that slide in cooperation with the sliding guide rail, and the two sides of the sliding guide rail are provided with snap-fit ​​grooves, and the inside of the snap-fit ​​grooves is provided with a linkage rack.

[0014] Furthermore, the lateral drive structure includes a dual-axis synchronous motor, with lateral drive gears at both ends of the motor shaft of the dual-axis synchronous motor. The lateral drive gears mesh with the linkage rack, and an extension wire is provided on one side of the dual-axis synchronous motor.

[0015] Furthermore, the longitudinal drive structure includes a drive frame, which is fixedly installed at the top of the longitudinal frame. A servo motor is installed inside the longitudinal frame, and a longitudinal drive gear is installed at the motor shaft of the servo motor. A second rack is installed on the top surface of the transverse guide rail at a position corresponding to the longitudinal drive gear, and the second rack meshes with the longitudinal drive gear.

[0016] Furthermore, the adjustment structure includes a transmission screw, both ends of which are rotatably connected to mounting plates fixedly connected to the base. An adjustment motor is fixedly mounted on one end of one of the mounting plates. A transmission sleeve is fitted on the outer peripheral wall of the transmission screw, and the transmission sleeve is threadedly engaged with the transmission screw. A fixed bracket is fixedly connected to one end of the transmission sleeve, and a sliding bracket is slidably provided at the other end. Both the fixed bracket and the sliding bracket are L-shaped. An electric telescopic rod is provided at one end of the fixed bracket, and the telescopic end of the electric telescopic rod is fixedly connected to the sliding bracket.

[0017] Furthermore: the loading and unloading structure includes a guide plate, and support rods fixedly connected to the base are provided at the four corners of the guide plate. A sliding groove is provided inside the guide plate, and an electric slider is provided inside the sliding groove. A control platform is provided at the top of the electric slider, and a circuit board attraction structure is provided at the bottom of the electric slider. A positioning structure is provided at the top of the base and at the bottom of the guide plate.

[0018] Furthermore, the circuit board attraction structure includes a positioning plate, which is fixedly connected to the bottom end of the electric slider. Electric extension rods are provided at the four corners of the bottom end of the positioning plate. The bottom ends of the synchronous electric extension rods are connected to a synchronous plate. Several pneumatic attraction heads are magnetically connected to the bottom end of the synchronous plate.

[0019] Furthermore, the positioning structure includes a transverse plate, which is fixedly connected to the base. Two sets of transverse plates are provided and are respectively located on both sides of the axis of the transmission screw. A limiting platform is provided at the top of the transverse plate. The limiting platform and the side wall of the positioning slide plate together form a right angle corner. A limiting groove is provided on the top surface of the opposite side of the two limiting platforms. The bottom wall of the limiting groove is flush with the top wall of the sliding bracket.

[0020] According to another aspect of the present invention, a marking method for an automatic marking device of a testing machine is provided, for use in the aforementioned automatic marking device of a testing machine, comprising the following steps:

[0021] S101: Manual loading. Open the movable cover and manually place the circuit board on the top of the horizontal plate, ensuring that one right-angle apex of the circuit board contacts the two side walls of the right-angle corner.

[0022] S102: Mechanical feeding. The circuit board suction structure is moved to the top of the circuit board by the movement of the electric slider. The pneumatic suction head is moved downward by the electric extension rod. The circuit board is then placed between the fixed bracket and the sliding bracket by the pneumatic suction head. The circuit board is then moved to the bottom of the dotting structure by adjusting the rotation of the motor.

[0023] S103: Dotting. The horizontal drive structure moves the horizontal frame, and the vertical drive structure moves the vertical frame, so that the dotting structure moves to the position on the circuit board where dotting is required. During the movement, the circuit board is inspected by the inspection camera to distinguish between good and bad products. Then, the dotting ink cartridge applies ink dots of different colors to the two types of circuit boards respectively.

[0024] S104: Material feeding, based on S102, material feeding is performed through the loading and unloading structure.

[0025] In summary, the present invention has at least one of the following beneficial technical effects:

[0026] 1. The automatic marking device for the testing machine uses a detection camera to inspect the circuit board to distinguish between good and defective circuit boards. At the same time, the detection camera determines the marking position, and the controller controls the pneumatic rod to push the sliding sleeve downward to mark the surface of the circuit board. Compared with manual marking, it can effectively improve the accuracy of marking.

[0027] 2. This automatic dotting device for a testing machine, during dotting, pushes a sliding sleeve downward by a pneumatic rod, bringing the dotting head close to the circuit board, and sprays ink from the carrier cavity by an inkjet pump to achieve the purpose of dotting the circuit board. The two carrier cavities can store two different colors of ink, and dotting is performed separately for good and defective products during the dotting process, so as to facilitate the differentiation of good and defective products in subsequent steps and improve the accuracy of marking.

[0028] 3. This automatic marking device for a testing machine controls the movement of the transmission sleeve during the rotation of the transmission screw to adjust the position of the fixed bracket, so that the fixed bracket can be moved to the bottom of the loading and unloading structure to facilitate the placement of the circuit board between the fixed bracket and the sliding bracket. The electric telescopic rod is used to control the distance between the sliding bracket and the fixed bracket, so that the device can be adapted to circuit boards of different sizes. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an automatic dotting device for a testing machine according to the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of an automatic dotting device for a testing machine according to the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of a test installation platform for an automatic marking device for a test machine according to the present invention;

[0033] Figure 4 This is a schematic diagram of the transverse drive structure and the longitudinal drive structure of an automatic marking device for a testing machine according to the present invention;

[0034] Figure 5 This is a schematic diagram of the loading and unloading structure of an automatic marking device for a testing machine according to the present invention;

[0035] Figure 6 This is a schematic diagram of the marking structure of an automatic marking device for a testing machine according to the present invention;

[0036] Figure 7 This is a schematic diagram of the adjustment structure of an automatic dotting device for a testing machine according to the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the dotting ink cylinder of an automatic dotting device for a testing machine according to the present invention.

[0038] In the diagram: 1. Base; 2. Detection camera; 3. Protective housing; 4. Movable cover; 5. Positioning baffle; 6. Sliding guide rail; 7. Horizontal frame; 71. Guide rail groove; 72. Snap-fit ​​groove; 73. Linkage rack; 8. Horizontal drive structure; 81. Dual-axis synchronous motor; 82. Horizontal drive gear; 83. Extension wire; 9. Horizontal guide rail; 10. Vertical frame; 11. Vertical drive structure; 111. Drive frame; 112. Servo motor; 113. Vertical drive gear; 114. Second rack; 12. Dotting structure; 121. Pneumatic rod; 122. Sliding sleeve; 123. Sliding sleeve positioning groove; 124. Mounting plate; 125. Insertion hole; 126. Dotting ink cartridge; 1261. Circular sleeve; 1262. Bearing cavity; 1263. Sleeve head; 1264. Dotting head; 1265. 13. Inkjet pump; 14. Test and installation platform; 15. Positioning slide plate; 16. Sliding frame; 17. Electric sliding support plate; 18. Limiting plate; 19. Loading and unloading structure; 10. Guide plate; 12. Support rod; 13. Sliding groove; 14. Electric slider; 15. Control platform; 16. Circuit board suction structure; 17. Positioning plate; 18. Electric extension rod; 19. Synchronization plate; 10. Pneumatic suction head; 11. Positioning structure; 12. Horizontal plate; 13. Limiting platform; 14. Right angle corner; 15. Limiting slide groove; 16. Adjustment structure; 17. Transmission screw; 18. Mounting plate; 19. Adjustment motor; 10. Transmission sleeve; 11. Fixed bracket; 12. Sliding bracket; 13. Electric telescopic rod. Detailed Implementation

[0039] The invention will now be further described with reference to the accompanying drawings and specific embodiments: Example 1:

[0040] Reference Figure 1 - Figure 8This invention discloses an automatic marking device for a testing machine, comprising a base 1 and a detection camera 2. The base 1 has a protective housing 3 on its outer periphery, and movable covers 4 on both sides of the protective housing 3. Positioning baffles 5 are provided on both sides of the upper end of the base 1. Sliding guide rails 6 are provided at corresponding positions on the two positioning baffles 5. A transverse frame 7 is slidably connected to the two sliding guide rails 6. A transverse drive structure 8 is provided at the top of the transverse frame 7. A transverse guide rail 9 is provided on one side of the transverse frame 7. A longitudinal frame 10 is slidably connected to the outer periphery of the transverse guide rail 9. A longitudinal drive structure 11 is provided at the top of the longitudinal frame 10. A marking structure 12 is provided on the side wall of the longitudinal frame 10. A test mounting platform 13 is provided on the top surface of the base 1, located between the two positioning baffles 5.

[0041] The test installation platform 13 includes two positioning slide plates 131, which are arranged opposite each other according to the axis of symmetry of the base 1. A sliding frame 132 is fixedly installed on the top of the positioning slide plate 131 by bolts. An electric sliding support plate 133 is provided inside the sliding frame 132. Since the sliding frame 132 and the positioning slide plate 131 are connected by bolts, the distance between the two sliding frames 132 can be adjusted according to the size of the circuit board to be marked, so that the electric sliding support plate 133 corresponds to the two sides of the circuit board. The two electric sliding support plates 133 can move synchronously through the controller, and a limit plate 134 is fixedly connected to the upper end of the electric sliding support plate 133. Both ends of the positioning slide plate 131 are provided with loading and unloading structures 14, and an adjustment structure 15 is provided between the two positioning slide plates 131.

[0042] The dotting structure 12 includes a pneumatic rod 121 and a sliding sleeve 122. The pneumatic rod 121 is fixedly installed at the bottom end of the longitudinal frame 10. The sliding sleeve 122 is slidably installed on the side wall of the longitudinal frame 10, and the side wall of the sliding sleeve 122 is provided with a sliding sleeve positioning groove 123. The sliding sleeve positioning groove 123 is provided with a guide block fixedly connected to the longitudinal frame 10. The bottom ends of the pneumatic rod 121 and the sliding sleeve 122 are connected to a mounting plate 152124. The mounting plate 152124 and the bottom end of the sliding sleeve 122 are provided with a insertion hole 125. The sliding sleeve 122 is provided with a dotting ink cartridge 126. The detection camera 2 is fixedly installed on one side of the mounting plate 152124.

[0043] In this embodiment, the base 1 is equipped with a control power supply and controllers for various electric components in the control device. During use, the movable cover 4 is opened, and the circuit board is manually placed directly below the loading / unloading structure 14. The circuit board requiring detection and marking is then placed inside the adjustment structure 15 via the loading / unloading structure 14. The adjustment structure 15 moves the circuit board directly below the marking structure 12. Guided by the sliding frames 132 on both sides, the electric sliding support plate 133 moves, and the two limiting plates 134 are respectively pressed against both sides of the circuit board to fix it in place. The movement of the electric sliding support plate 133 is synchronously controlled by the controller, so when fixing the circuit board, the circuit board can be located at the center of the symmetry axis of the base 1, which can effectively determine the position of the circuit board. The circuit board is inspected by the detection camera 2 to distinguish between good and defective circuit boards. At the same time, the detection camera 2 determines the marking position, and the controller controls the pneumatic rod 121 to push the sliding sleeve downward to mark the surface of the circuit board to distinguish between good and defective products and prevent defective products from being used in the next process. Compared with manual marking, it can effectively improve the accuracy of marking.

[0044] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the dotting ink cartridge 126 includes a circular sleeve 1261, with two bearing cavities 1262 inside the circular sleeve 1261. The bottom end of the circular sleeve 1261 is provided with a sleeve head 1263 that mates with the insertion hole 125, and the bottom end of the sleeve head 1263 is provided with two dotting heads 1264 that correspond to the two bearing cavities 1262 respectively. The top end of the circular sleeve 1261 is provided with an inkjet pump 1265.

[0045] In this embodiment, during dotting, the pneumatic rod 121 pushes the sliding sleeve 122 downward to make the dotting head 1264 approach the circuit board, and the ink in the bearing cavity 1262 is ejected by the ink pump 1265 to achieve the purpose of dotting the circuit board.

[0046] The two bearing cavities 1262 can store two different colors of ink and mark good and bad products separately during the dotting process, so as to distinguish good and bad products in subsequent steps and improve the accuracy of marking.

[0047] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the two ends of the transverse frame 7 are provided with guide rail grooves 71 that slide with the sliding guide rail 6, and the two sides of the sliding guide rail 6 are provided with snap-fit ​​grooves 72, and the inside of the snap-fit ​​grooves 72 is provided with a linkage rack 73.

[0048] In this embodiment, the guide rail groove 71 is used to connect the transverse frame 7 to the two sliding guide rails 6. When the transverse frame 7 and the sliding guide rails 6 are connected, the protrusion inside the guide rail groove 71 will contact the snap-fit ​​groove 72, thereby improving the stability of the connection between the transverse frame 7 and the sliding guide rails 6 through the snap-fit ​​groove 72.

[0049] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the lateral drive structure 8 includes a dual-axis synchronous motor 81. Both ends of the motor shaft of the dual-axis synchronous motor 81 are provided with lateral drive gears 82. The lateral drive gears 82 mesh with the linkage rack 73. An extension wire 83 is provided on one side of the dual-axis synchronous motor 81.

[0050] In this embodiment, the dual-axis synchronous motor 81 simultaneously controls the rotation of the transverse drive gears 82 on both sides, which in turn works with the linkage rack 73 to control the transverse frame 7 to move on the upper end of the sliding guide rail 6, thereby adjusting the longitudinal position of the dotting structure 12.

[0051] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the longitudinal drive structure 11 includes a drive frame 111, which is fixedly installed at the top of the longitudinal frame 10. A servo motor 112 is installed inside the longitudinal frame 10, and a longitudinal drive gear 113 is installed at the motor shaft of the servo motor 112. A second rack 114 is installed on the top surface of the transverse guide rail 9 at a position corresponding to the longitudinal drive gear 113, and the second rack 114 meshes with the longitudinal drive gear 113.

[0052] In this embodiment, by setting the servo motor 112, the longitudinal drive gear 113 cooperates with the second rack 114 to enable the drive frame 111 to move in the straight direction of the transverse guide rail 9, so as to adjust the transverse position of the dotting structure 12. In addition, in conjunction with the transverse drive structure 8, the position of the longitudinal frame 10 and the dotting structure 12 in any plane inside the base 1 can be effectively controlled, so as to control the dotting structure 12 to correspond with the position of the circuit board that needs to be dotted, thereby improving the dotting accuracy.

[0053] In a further preferred embodiment of the invention, such as Figure 1-8As shown, the adjustment structure 15 includes a transmission screw 151. Both ends of the transmission screw 151 are rotatably connected to mounting plates 152124 that are fixedly connected to the base 1. One end of one mounting plate 152124 is fixedly mounted with an adjustment motor 153. A transmission sleeve 154 is sleeved on the outer peripheral wall of the transmission screw 151, and the transmission sleeve 154 is threadedly engaged with the transmission screw 151. One end of the transmission sleeve 154 is fixedly connected to a fixed bracket 155, and the other end is slidably provided with a sliding bracket 156. Both the fixed bracket 155 and the sliding bracket 156 are L-shaped. One end of the fixed bracket 155 is provided with an electric telescopic rod 157, and the telescopic end of the electric telescopic rod 157 is fixedly connected to the sliding bracket 156.

[0054] In this embodiment, the transmission screw 151 is mounted on the top of the base 1 via the mounting plate 152124, and the rotation of the transmission screw 151 is controlled by the adjusting motor 153. When the transmission screw 151 rotates, the transmission sleeve 154 is threadedly engaged with the transmission screw 151, and as... Figure 7 As shown, the bottom end of the transmission sleeve 154 is flat, and the bottom plane of the transmission sleeve 154 is in contact with the bottom surface of the base 1, which can effectively prevent the transmission sleeve 154 from rotating with the transmission screw 151.

[0055] Furthermore, during the rotation of the transmission screw 151, the transmission sleeve 154 can be effectively controlled to move, thereby adjusting the position of the fixed bracket 155. This allows the fixed bracket 155 to move below the loading / unloading structure 14, so that the circuit board can be placed between the fixed bracket 155 and the sliding bracket 156. The circuit board can then be moved by adjusting the structure 15. The electric telescopic rod 157 is used to control the distance between the sliding bracket 156 and the fixed bracket 155, enabling the device to adapt to circuit boards of different sizes.

[0056] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the loading and unloading structure 14 includes a guide plate 141. Support rods 142, which are fixedly connected to the base 1, are provided at the four corners of the guide plate 141. A sliding groove 143 is provided inside the guide plate 141. An electric slider 144 is provided inside the sliding groove 143. A control platform 145 is provided at the top of the electric slider 144. A circuit board attraction structure 146 is provided at the bottom of the electric slider 144. A positioning structure 147 is provided at the upper end of the base 1 and at the bottom end of the guide plate 141.

[0057] In this embodiment, the positioning structure 147 is used to position the circuit board during manual loading so that the circuit board can be placed directly below the guide plate 141, so that the circuit board attraction structure 146 can attract the circuit board.

[0058] When adsorbing the circuit board, the control machine 145 provides power to the electric slider 144, causing the electric slider 144 to move inside the sliding groove 143, thereby moving the circuit board attraction structure 146 to the top of the circuit board.

[0059] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the circuit board attraction structure 146 includes a positioning plate 1461, which is fixedly connected to the bottom end of the electric slider 144. Electric extension rods 1462 are provided at the four corners of the bottom end of the positioning plate 1461. The bottom ends of the synchronous electric extension rods 1462 are connected to a synchronous plate 1463. The bottom end of the synchronous plate 1463 is magnetically connected to a plurality of pneumatic suction heads 1464.

[0060] In this embodiment, when the circuit board attraction structure 146 moves to the top of the circuit board, the synchronous plate 1463 is pushed downward by the electric extension block, and the pneumatic suction head 1464 contacts the circuit board. By controlling the air pump installed inside the machine tool 145, after the lower port of the pneumatic suction head 1464 contacts the circuit board, the pneumatic suction head 1464 forms a negative pressure to achieve the purpose of adsorbing the circuit board. Then, by moving the electric slider 144, the circuit board is moved above the fixed bracket 155 and the sliding bracket 156, and the circuit board is slowly lowered so that the circuit board is stuck between the fixed bracket 155 and the sliding bracket 156 to achieve the effect of fixing the circuit board.

[0061] In a further preferred embodiment of the invention, such as Figure 1-8 As shown, the positioning structure 147 includes a transverse plate 1471, which is fixedly connected to the base 1. Two sets of transverse plates 1471 are provided and are respectively provided on both sides of the axis of the transmission screw 151. A limiting platform 1472 is provided at the top of the transverse plate 1471. The limiting platform 1472 and the side wall of the positioning slide plate 131 together form a right angle corner 1473. A limiting groove 1474 is provided on the top surface of the opposite side of the two limiting platforms 1472. The bottom wall of the limiting groove 1474 is flush with the top wall of the sliding bracket 156.

[0062] In this embodiment, the horizontal plate 1471 is used to fix the limiting platform 1472, and the limiting platform 1472 and the horizontal plate 1471 are fixed by bolts. This allows the gap between the two limiting platforms 1472 to be adjusted according to different sizes of circuit boards. The right angle corner 1473 formed between the limiting platform 1472 and the positioning slide plate 131 is used to position the feeding position during manual feeding. Example 2:

[0063] According to another aspect of the present invention, a marking method for an automatic marking device for a testing machine is provided.

[0064] The marking method of the automatic marking device of the testing machine includes the following steps:

[0065] S101: Manual feeding. Open the movable cover 4 and manually place the circuit board on the top of the horizontal plate 1471, so that one of the right-angle apex corners of the circuit board contacts the two side walls of the right-angle corner 1473.

[0066] In this embodiment, the circuit board is initially positioned by manual feeding in step S101 so that the circuit board attraction structure 146 can accurately attract the circuit board, which can effectively improve the accuracy of the circuit board during mechanical feeding and achieve the purpose of improving the marking accuracy.

[0067] S102: Mechanical feeding. The circuit board suction structure 146 is moved to the top of the circuit board by the movement of the electric slider 144. The pneumatic suction head 1464 is moved downward by the electric extension rod 1462. The circuit board is then placed between the fixed bracket 155 and the sliding bracket 156. The circuit board is moved to the bottom of the dotting structure 12 by adjusting the rotation of the motor 153.

[0068] In this embodiment, based on the arrangement of the fixed bracket 155 and the sliding bracket 156 in step S102, the circuit board can be effectively moved to directly below the dotting structure 12, allowing the circuit board to quickly approach the dotting structure 12 for dotting operations, thereby improving dotting efficiency.

[0069] S103: Dotting. The horizontal drive structure 8 drives the horizontal frame 7 to move, and the vertical drive structure 11 drives the vertical frame 10 to move, so that the dotting structure 12 moves to the position where the circuit board needs to be dotted. During the movement, the circuit board is inspected by the inspection camera 2 to distinguish between good and bad products. Then, the dotting ink cartridge 126 applies ink dots of different colors to the two types of circuit boards respectively.

[0070] In this embodiment, based on the setting of two bearing cavities 1262 inside the dotting ink cartridge 126 in S103, two different colors of ink can be stored. When the inspection camera 2 detects good products and defective products, ink of different colors is sprayed on the dotting positions of good products and defective products, so as to distinguish good products and defective products in subsequent work.

[0071] S104: Unloading. Based on S102, unloading is performed through loading and unloading structure 14. When several circuit boards are stacked, the circuit boards are then manually removed.

[0072] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing machine automatic dotting device comprising a base (1) and a detection camera (2), characterized in that, The outer peripheral wall of the base (1) is provided with a protective shell (3), and the two sides of the protective shell (3) are provided with movable covers (4); the upper ends of the base (1) are provided with positioning baffle plates (5), and the corresponding positions of the two positioning baffle plates (5) are provided with sliding guide rails (6); the two sliding guide rails (6) are commonly and slidingly connected with a transverse rack (7), and the top end of the transverse rack (7) is provided with a transverse driving structure (8); one side of the transverse rack (7) is provided with a transverse guide rail (9), and the outer peripheral side of the transverse guide rail (9) is slidingly connected with a longitudinal rack (10); the top end of the longitudinal rack (10) is provided with a longitudinal driving structure (11); the side wall of the longitudinal rack (10) is provided with a dotting structure (12); and the top surface of the base (1) and the position between the two positioning baffle plates (5) are provided with a test installation platform (13); The test installation platform (13) comprises two positioning sliding plates (131), which are oppositely arranged; the top end of the positioning sliding plate (131) is fixedly installed with a sliding frame (132) through bolts; the inside of the sliding frame (132) is provided with an electric sliding support plate (133), and the upper end of the electric sliding support plate (133) is fixedly connected with a limiting plate (134); the two ends of the positioning sliding plate (131) are provided with an up-down structure (14); and the two positioning sliding plates (131) are provided with an adjusting structure (15) therebetween; The dotting structure (12) comprises a gas pressure rod (121) and a sliding sleeve (122); the gas pressure rod (121) is fixedly installed at the bottom end of the longitudinal rack (10); the sliding sleeve (122) is slidingly installed on the side wall of the longitudinal rack (10), and a sliding sleeve positioning groove (123) is formed in the side wall of the sliding sleeve (122); the inside of the sliding sleeve positioning groove (123) is provided with a guide block fixedly connected with the longitudinal rack (10); the bottom ends of the gas pressure rod (121) and the sliding sleeve (122) are commonly connected with a first mounting plate (124), and the first mounting plate (124) and the bottom end of the sliding sleeve (122) commonly form a plug-in hole (125); the inside of the sliding sleeve (122) is provided with a dotting ink cylinder (126); and the detection camera (2) is fixedly installed on one side of the first mounting plate (124); The dotting ink cylinder (126) comprises a circular sleeve (1261); the inside of the circular sleeve (1261) is provided with two bearing cavities (1262); the bottom end of the circular sleeve (1261) is provided with a sleeve head (1263) matched with the plug-in hole (125); the bottom end of the sleeve head (1263) is provided with two dotting ink heads (1264) corresponding to the two bearing cavities (1262); and the top end of the circular sleeve (1261) is provided with an ink jet pump (1265). The adjusting structure (15) comprises a transmission screw rod (151), both ends of the transmission screw rod (151) are rotatably connected with the second mounting plates (152) fixedly connected with the base (1), one end of one of the second mounting plates (152) is fixedly provided with an adjusting motor (153), the outer circumferential wall of the transmission screw rod (151) is sleeved with a transmission sleeve (154), the transmission sleeve (154) is in threaded cooperation with the transmission screw rod (151), one end of the transmission sleeve (154) is fixedly connected with a fixed support (155), and the other end is slidably provided with a sliding support (156), the fixed support (155) and the sliding support (156) are both provided in an L shape, one end of the fixed support (155) is provided with an electric telescopic rod (157), and the telescopic end of the electric telescopic rod (157) is fixedly connected with the sliding support (156); The feeding and discharging structure (14) comprises a guide plate (141), four corners of the guide plate (141) are provided with support rods (142) fixedly connected with the base (1), the inside of the guide plate (141) is provided with a sliding groove (143), the inside of the sliding groove (143) is provided with an electric sliding block (144), one end of the electric sliding block (144) is provided with a control machine table (145), the bottom end of the electric sliding block (144) is provided with a circuit board suction structure (146), and the upper end of the base (1) and the bottom end of the guide plate (141) are provided with a positioning structure (147).

2. The automatic dotter of a testing machine according to claim 1, characterized in that, Both ends of the transverse rack (7) are provided with guide rail grooves (71) in sliding cooperation with the sliding guide rails (6), both sides of the sliding guide rail (6) are provided with clamping grooves (72), and the inside of the clamping groove (72) is provided with a linkage rack (73).

3. The automatic dotter of a testing machine according to claim 2, wherein The transverse driving structure (8) comprises a double-shaft synchronous motor (81), both ends of the motor shaft of the double-shaft synchronous motor (81) are provided with transverse driving gears (82), the transverse driving gears (82) are in meshing cooperation with the linkage rack (73), and one side of the double-shaft synchronous motor (81) is provided with an extension guide line (83).

4. The automatic dotter of a testing machine according to claim 3, wherein The longitudinal driving structure (11) comprises a driving rack (111) fixedly installed at the top end of the longitudinal rack (10), the inside of the longitudinal rack (10) is provided with a servo motor (112), the motor shaft of the servo motor (112) is provided with a longitudinal driving gear (113), the top surface of the transverse guide rail (9) is provided with a second rack (114) at a position corresponding to the longitudinal driving gear (113), and the second rack (114) is in meshing cooperation with the longitudinal driving gear (113).

5. The automatic dotter of a testing machine according to claim 4, wherein The circuit board suction structure (146) comprises a positioning plate (1461) fixedly connected with the bottom end of the electric sliding block (144), the bottom end of the positioning plate (1461) is provided with electric extension rods (1462) at four corners, the bottom ends of the electric extension rods (1462) are jointly connected with a synchronous plate (1463), and the bottom end of the synchronous plate (1463) is magnetically connected with a plurality of pneumatic suction heads (1464).

6. The automatic dotter of a testing machine according to claim 5, wherein The positioning structure (147) comprises a transverse plate (1471) fixedly connected with the base (1), the transverse plate (1471) is provided with two groups and is arranged on the two sides of the axis of the transmission lead screw (151) respectively, the top end of the transverse plate (1471) is provided with a limiting table (1472), the limiting table (1472) and the side wall of the positioning slide plate (131) jointly form a right angle corner (1473), and the opposite side top surfaces of the two limiting tables (1472) are each provided with a limiting sliding groove (1474), and the groove bottom wall of the limiting sliding groove (1474) is flush with the top wall of the sliding support (156).

7. A method of marking a test machine automatic marking device, characterized by, The automatic dotting device for any one of the test machines of claims 1-6 comprises the following steps: S101: manual feeding, opening the movable cover, placing the circuit board on the top end of the transverse plate by manual, and making one right angle top corner of the circuit board contact with the two side walls of the right angle corner (1473); S102: mechanical feeding, moving the circuit board suction structure (146) to the upper side of the circuit board by the movement of the electric sliding block (144), moving the pneumatic suction head (1464) downward by the electric extension rod (1462), adsorbing the circuit board by the pneumatic suction head (1464), placing the circuit board between the fixed support (155) and the sliding support (156), and moving the fixed support (155) and the sliding support (156) to the lower side of the dotting structure (12) by the rotation of the adjusting motor (153); S103: dotting, moving the transverse frame (7) by the transverse driving structure (8), moving the longitudinal frame (10) by the longitudinal driving structure (11), moving the dotting structure (12) to the position where the circuit board needs to be dotted, detecting the circuit board by the detection camera (2) during the movement, distinguishing the good and bad products, and respectively dotting the two kinds of circuit boards by the dotting ink barrel (126) to form different color dots; S104: discharging, based on S103, discharging by the feeding and discharging structure (14).

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