High-precision automobile PCB positioning device based on CCD secondary drilling positioning

Abstract

The utility model relates to the technical field of high-density automobile electronic PCB manufacturing, and discloses a high-precision automobile PCB positioning device based on CCD secondary drilling positioning, which comprises a protective cover, a drilling assembly used for drilling an automobile PCB is arranged in the protective cover, and an optical positioning assembly used for positioning the drilling position of the automobile PCB is arranged on one side of the drilling assembly. According to the utility model, the auxiliary positioning mechanism is started to carry out auxiliary positioning on the automobile PCB on the placing table, and as the windowing pattern with the diameter of 0.8-1.0 mm is reserved on the solder mask layer on the surface of the PCB as the positioning target spot, each automobile PCB unit selects four target spots to carry out accurate coordinate calibration through the optical positioning assembly; and the error between the drilling position and the design coordinate is limited within + / -10 microns, data calibrated by the optical positioning assembly is transmitted to the control console, the control console receives the data for calculation, the drilling assembly is started according to the computer result of the control console to conduct secondary drilling on the four positioning target spots, and the function of secondary positioning is achieved.

Description

Technical Field

[0001] This utility model relates to the field of high-density automotive electronic PCB manufacturing technology, specifically to a high-precision automotive PCB positioning device based on CCD secondary drilling positioning. Background Technology

[0002] High-density automotive electronics PCB drilling technology is a core component in ensuring the performance and reliability of circuit boards. Mechanical drilling is suitable for processing holes with diameters >0.15mm. By optimizing the drill bit material (such as cemented carbide) and chip removal design through CNC drilling machines, and by adjusting the rotation speed and feed parameters, efficiency can be improved. Laser drilling is designed for micro-holes ≤0.15mm. It uses precise energy control to achieve non-contact, high-precision processing to meet the needs of high-density interconnection. During the production of high-density automotive electronics PCBs, due to the expansion and contraction variations of the board material (±50μm), a fixed expansion and contraction mode can cause some board components to be misaligned, resulting in solder paste printing offset, which in turn affects the soldering yield. The positional accuracy of solder mask to hole is insufficient (±50μm), which cannot meet the stringent requirement of ±35μm for high-density automotive electronics, leading to a decrease in signal transmission stability.

[0003] In the processing of high-density automotive electronic PCBs, the accuracy of drilling positioning directly affects the quality and performance of the PCBs. Existing high-density automotive electronic PCB positioning devices often only perform one positioning operation during drilling, which is insufficient to meet the high-precision drilling requirements. This is especially true for automotive PCBs, which have extremely high drilling accuracy requirements. A single positioning operation is easily affected by various factors, such as minor deformation of the board material and positioning errors of the fixture, resulting in inaccurate drilling positions and affecting the reliability of high-density automotive electronic PCBs. Therefore, those skilled in the art provide a high-precision automotive PCB positioning device based on CCD secondary drilling positioning to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision automotive PCB positioning device based on CCD secondary drilling positioning, thereby solving the problems in the above-mentioned technology.

[0005] This utility model provides the following technical solution: a high-precision automotive PCB positioning device based on CCD secondary drilling positioning, including a protective cover. The inside of the protective cover is provided with a drilling assembly for drilling holes in the automotive PCB. On one side of the drilling assembly is provided an optical positioning assembly for positioning the drilling position of the automotive PCB. The inside of the protective cover is provided with a placement platform for placing the automotive PCB. The top of the placement platform is provided with an auxiliary positioning mechanism for auxiliary positioning of the automotive PCB. A control console is fixedly installed on one side of the outer wall of the protective cover. The control console is communicatively connected to the drilling assembly and the optical positioning assembly.

[0006] As a preferred embodiment of the above technical solution, the surface of the protective cover is fitted with a cover plate via a hinge, and electric telescopic rods are hinged to both sides of the inner wall of the protective cover. The ends of the two sets of electric telescopic rods away from the protective cover are hinged to the inner wall of the cover plate.

[0007] As a preferred embodiment of the above technical solution, a first side plate is fixedly installed on one side of the bottom end of the placement platform, and a second side plate and a third side plate are fixedly connected to both ends of the first side plate, and the bottom ends of the first side plate, the second side plate and the third side plate are all fixedly installed inside the bottom end of the protective cover.

[0008] As a preferred embodiment of the above technical solution, the auxiliary positioning mechanism includes a cylinder fixedly installed inside the protective cover and a second hinge fixedly installed on both sides of the top of the third side plate. The cylinder is located between the second side plate and the third side plate. A top plate is fixedly installed on the top of the cylinder. First limiting rods are slidably installed on both sides of the top of the top plate. The tops of the two sets of first limiting rods are fixedly connected to both sides of the bottom of the placement platform.

[0009] As a preferred embodiment of the above technical solution, a first hinge is fixedly installed on both sides of the top of the top plate, and a crank is rotatably installed on the inner side of each of the two sets of first hinges. A limit groove is opened inside the two sets of cranks. A connecting frame is fixedly installed on both sides of the top of the second side plate, and a connecting rod is fixedly connected between the two sets of connecting frames. The two ends of the surface of the connecting rod are respectively movably inserted into the interior of the two sets of limit grooves.

[0010] As a preferred embodiment of the above technical solution, the top ends of both sets of curved rods are fixedly connected to a second limiting rod, and the bottom of the two sets of second limiting rods away from the two sets of curved rods are fixedly connected to a first positioning block. The two sets of first positioning blocks are located on both sides of the top of the placement platform, and the first positioning blocks move in the vertical direction.

[0011] As a preferred embodiment of the above technical solution, a crossbar is rotatably mounted on the inner side of each of the two sets of second hinge members. A spring is fixedly connected to the top of the end of each of the two sets of crossbars away from the second hinge members. The top of each of the two sets of springs is fixedly connected to both sides of the bottom of the placement platform. An abutment block is fixedly mounted at the bottom of each of the two sets of crossbars. The abutment blocks are located above the top plate at the end away from the two sets of first hinge members. A vertical rod is fixedly connected to the top of each of the two sets of crossbars near the end of the two sets of second hinge members. A second positioning block is fixedly mounted on one side of the top of each of the two sets of vertical rods. The two sets of second positioning blocks are located at the two ends of the placement platform away from the two sets of first positioning blocks, and the two sets of second positioning blocks are arranged horizontally.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention first places the automotive PCB board on top of the placement platform, then activates the auxiliary positioning mechanism to assist in positioning the PCB board on the platform. Since the solder mask layer on the PCB board surface has pre-reserved window patterns with a diameter of 0.8-1.0mm as positioning target points, four target points are selected for each automotive PCB unit (PCS) and precisely calibrated using an optical positioning component. This ensures that the error between the drilling position and the design coordinates is limited to ±10μm. Simultaneously, the calibration data from the optical positioning component is transmitted to the control console. The control console receives the data, performs calculations, and, based on the computer results, activates the drilling component to perform secondary drilling on the four positioning target points. This achieves the function of secondary positioning, solving the problem that primary positioning is easily affected by various factors, such as minor deformation of the board material and positioning errors of the fixture, leading to inaccurate drilling positions. This ensures the reliability of high-density automotive electronic PCBs. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a high-precision automotive PCB positioning device based on CCD secondary drilling positioning.

[0015] Figure 2 This is a schematic diagram of the protective cover in a high-precision automotive PCB positioning device based on CCD secondary drilling positioning.

[0016] Figure 3 This is a schematic diagram of the auxiliary positioning mechanism in a high-precision automotive PCB positioning device based on CCD secondary drilling positioning.

[0017] Figure 4 This is a schematic diagram of the first positioning block in a high-precision automotive PCB positioning device based on CCD secondary drilling positioning.

[0018] Figure 5 This is a schematic diagram of the structure of the second positioning block in a high-precision automotive PCB positioning device based on CCD secondary drilling positioning.

[0019] In the diagram: 1. Protective cover; 101. Drilling assembly; 102. Optical positioning assembly; 103. Cover plate; 104. Electric telescopic rod; 2. Placement platform; 201. First side plate; 202. Second side plate; 203. Third side plate; 3. Auxiliary positioning mechanism; 301. Cylinder; 302. Top plate; 303. First limiting rod; 304. First hinge; 305. Curved rod; 306. Limiting groove; 307. Connecting frame; 308. Connecting rod; 309. Second limiting rod; 310. First positioning block; 311. Second hinge; 312. Horizontal bar; 313. Spring; 314. Abutment block; 315. Vertical bar; 316. Second positioning block; 4. Control console. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figures 1-5 As shown, this utility model provides a technical solution: a high-precision automotive PCB positioning device based on CCD secondary drilling positioning, including a protective cover 1. The interior of the protective cover 1 is provided with a drilling assembly 101 for drilling automotive PCBs. One side of the drilling assembly 101 is provided with an optical positioning assembly 102 for positioning the drilling position of the automotive PCB. A cover plate 103 is installed on the surface of the protective cover 1 via a hinge. Electric telescopic rods 104 are hinged to both sides of the inner wall of the protective cover 1. The ends of the two sets of electric telescopic rods 104 away from the protective cover 1 are hinged to the inner wall of the cover plate 103. The interior of the protective cover 1 is provided with a placement platform 2 for placing automotive PCBs. A first side plate 201 is fixedly installed on one side of the bottom end of the placement platform 2. A second side plate 202 and a third side plate 203 are fixedly connected to both ends of the first side plate 201, respectively. The bottom ends of the first side plate 201, the second side plate 202, and the third side plate 203 are all fixedly installed at the bottom end inside the protective cover 1.

[0022] When the cover plate 103 is closed, the electric telescopic rod 104 can push the cover plate 103 to fit tightly against the surface of the protective cover 1, ensuring the sealing of the device and preventing dust and other impurities from entering the device and affecting the drilling accuracy. The car PCB board can be placed on top of it conveniently.

[0023] The drilling assembly 101 uses a high-precision drilling machine, and the optical positioning assembly 102 is specifically a CCD camera. The optical positioning assembly 102 is used to optically position the drilling position on the PCB board. During the secondary drilling process, the camera of the optical positioning assembly 102 captures the solder mask opening target point, calculates the board expansion and contraction coefficient in real time, and then drills according to the calibrated coordinates. The accuracy error can meet ≤±35μm, which improves the solder mask to hole position accuracy from ±50um to within ±35um.

[0024] As one implementation method in this embodiment, please refer to Figure 1 , Figure 3 , Figure 4 Figure 5As shown, the top of the placement platform 2 is provided with an auxiliary positioning mechanism 3 for auxiliary positioning of the automotive PCB. The auxiliary positioning mechanism 3 includes a cylinder 301 fixedly installed inside the protective cover 1 and second hinge members 311 fixedly installed on both sides of the top of the third side plate 203. The cylinder 301 is located between the second side plate 202 and the third side plate 203. A top plate 302 is fixedly installed on the top of the cylinder 301. First limiting rods 303 are slidably installed on both sides of the top of the top of the top plate 302. The tops of the two sets of first limiting rods 303 are fixedly connected to both sides of the bottom of the placement platform 2. First hinge members 304 are fixedly installed on both sides of the top of the top of the top of the top plate 302. Both sides of the second side plate 202 are rotatably mounted with crank rods 305. Both sets of crank rods 305 have limit grooves 306 inside. Both sides of the top of the second side plate 202 are fixedly mounted with connecting brackets 307. A connecting rod 308 is fixedly connected between the two sets of connecting brackets 307. Both ends of the surface of the connecting rod 308 are movably inserted into the inside of the two sets of limit grooves 306. The top of both sets of crank rods 305 are fixedly connected with second limit rods 309. The bottom of the two sets of second limit rods 309 away from the two sets of crank rods 305 is fixedly connected with a first positioning block 310. The two sets of first positioning blocks 310 are located on both sides of the top of the placement platform 2, and the first positioning blocks 310 can move in the vertical direction.

[0025] When cylinder 301 is activated, it drives top plate 302 to move downward. Top plate 302 drives one end of two sets of crank rods 305 to move downward through two sets of first hinges 304. Since the inside of each set of crank rods 305 is provided with a limiting groove 306, and the limiting groove 306 is movably inserted into both ends of the surface of connecting rod 308, the other end of the two sets of crank rods 305 will move downward with the connecting rod 308 as the fulcrum. At this time, the two sets of second limiting rods 309 move downward accordingly. The two sets of second limiting rods 309 drive the two sets of first positioning blocks 310 to move downward until the bottom of the two sets of first positioning blocks 310 abuts against the top of the automotive PCB, thereby performing preliminary positioning of the automotive PCB.

[0026] As one implementation method in this embodiment, please refer to Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, a crossbar 312 is rotatably mounted on the inner side of each of the two sets of second hinge members 311. A spring 313 is fixedly connected to the top of each of the two sets of crossbars 312 at the end away from the second hinge member 311. The top of each of the two sets of springs 313 is fixedly connected to both sides of the bottom of the placement platform 2. An abutment block 314 is fixedly mounted at the bottom of each of the two sets of crossbars 312. The abutment blocks 314 are located above the top plate 302 at the end away from the two sets of first hinge members 304. A vertical bar 315 is fixedly connected to the top of each of the two sets of crossbars 312 at the end near the two sets of second hinge members 311. A second positioning block 316 is fixedly mounted on one side of the top of each of the two sets of vertical bars 315. The two sets of second positioning blocks 316 are located at the two ends of the placement platform 2 away from the two sets of first positioning blocks 310, and the two sets of second positioning blocks 316 are arranged horizontally.

[0027] Under the elastic force of the spring 313, the two sets of horizontal bars 312 rotate with the second hinge 311 as the fulcrum. The two sets of horizontal bars 312 drive the two sets of abutment blocks 314 to move downward until the bottom of the two sets of abutment blocks 314 abuts against the top of the top plate 302. At this time, the two sets of vertical bars 315 move downward as well. The two sets of vertical bars 315 drive the two sets of second positioning blocks 316 to move downward until the side walls of the two sets of second positioning blocks 316 abut against the side walls of the automotive PCB, thereby performing secondary positioning of the automotive PCB.

[0028] As one implementation method in this embodiment, please refer to Figures 1-2 As shown, a control console 4 is fixedly installed on one side of the outer wall of the protective cover 1. The control console 4 is communicatively connected to the drilling assembly 101 and the optical positioning assembly 102.

[0029] Since the solder mask layer on the PCB board surface has reserved window patterns with a diameter of 0.8-1.0mm as positioning target points, four target points are selected for each automotive PCB unit (PCS) and their coordinates are precisely calibrated by the optical positioning component 102 to ensure that the error between the drilling position and the design coordinates is limited to ±10μm. At the same time, the calibration data of the optical positioning component 102 is transmitted to the control console 4. The control console 4 receives the data, performs calculations, and starts the drilling component 101 to perform secondary drilling on the four positioning target points based on the computer results of the control console 4.

[0030] Working principle: When drilling and positioning of an automotive PCB is required, the automotive PCB is first placed on the placement platform 2. At this time, the cylinder 301 is activated, and the cylinder 301 drives the top plate 302 to move downward. The top plate 302 drives one end of the two sets of crank rods 305 to move downward through the two sets of first hinges 304. Since the two sets of crank rods 305 have limit grooves 306 inside, and the limit grooves 306 are movably inserted into both ends of the surface of the connecting rod 308, the other end of the two sets of crank rods 305 will move downward with the connecting rod 308 as the fulcrum. At this time, the two sets of second limit rods 309 move downward accordingly. The two sets of second limit rods 309 drive the two sets of first positioning blocks 310 to move downward until the bottom of the two sets of first positioning blocks 310 abuts against the top of the automotive PCB, thereby performing preliminary positioning of the automotive PCB.

[0031] At the same time, under the elastic force of the spring 313, the two sets of horizontal bars 312 rotate with the second hinge 311 as the fulcrum. The two sets of horizontal bars 312 drive the two sets of abutment blocks 314 to move downward until the bottom of the two sets of abutment blocks 314 abuts against the top of the top plate 302. At this time, the two sets of vertical bars 315 move downward as well. The two sets of vertical bars 315 drive the two sets of second positioning blocks 316 to move downward until the side wall of the two sets of second positioning blocks 316 abuts against the side wall of the automotive PCB, thereby performing secondary positioning of the automotive PCB and ensuring the stability of the automotive PCB during the drilling process.

[0032] Because the solder mask layer on the PCB board surface has reserved window patterns with a diameter of 0.8-1.0mm as positioning target points, four target points are selected for each automotive PCB unit (PCS) and their coordinates are precisely calibrated by the optical positioning component 102 to ensure that the drilling position and the design coordinate error are ≤±10μm. At the same time, the calibration data of the optical positioning component 102 is transmitted to the control console 4. The control console 4 receives the data, performs calculations, and starts the drilling component 101 to perform secondary drilling on the four positioning target points based on the computer results of the control console 4. After the drilling is completed, the cylinder 301 is started, which drives the top plate 302 to move upward. At this time, the two sets of cranks 305 rotate outward away from the side wall of the automotive PCB under the action of the connecting rod 308. The two sets of first positioning blocks 310 move upward accordingly. At the same time, the two sets of crossbars 312 rotate outward under the lifting force of the top plate 302, so that the two sets of second positioning blocks 316 move away from the side wall of the automotive PCB. At this time, the automotive PCB with completed drilling can be removed from the placement table 2, completing the entire drilling and positioning process.

[0033] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A high-precision automotive PCB positioning device based on CCD secondary drilling positioning, comprising a protective cover (1), characterized in that: The protective cover (1) is provided with a drilling assembly (101) for drilling automotive PCBs. An optical positioning assembly (102) for positioning the drilling position of the automotive PCB is provided on one side of the drilling assembly (101). The protective cover (1) is provided with a placement platform (2) for placing automotive PCBs. An auxiliary positioning mechanism (3) for auxiliary positioning of automotive PCBs is provided at the top of the placement platform (2). A control console (4) is fixedly installed on one side of the outer wall of the protective cover (1). The control console (4) is communicatively connected to the drilling assembly (101) and the optical positioning assembly (102).

2. The high-precision automotive PCB positioning device based on CCD secondary drilling positioning according to claim 1, characterized in that: The protective cover (1) has a cover plate (103) installed on its surface by a hinge. Electric telescopic rods (104) are hinged on both sides of the inner wall of the protective cover (1). The ends of the two sets of electric telescopic rods (104) away from the protective cover (1) are hinged to the inner wall of the cover plate (103).

3. The high-precision automotive PCB positioning device based on CCD secondary drilling positioning according to claim 1, characterized in that: A first side plate (201) is fixedly installed on one side of the bottom end of the placement platform (2). A second side plate (202) and a third side plate (203) are fixedly connected to both ends of the first side plate (201). The bottom ends of the first side plate (201), the second side plate (202) and the third side plate (203) are all fixedly installed inside the bottom end of the protective cover (1).

4. The high-precision automotive PCB positioning device based on CCD secondary drilling positioning according to claim 3, characterized in that: The auxiliary positioning mechanism (3) includes a cylinder (301) fixedly installed inside the protective cover (1) and a second hinge (311) fixedly installed on both sides of the top of the third side plate (203). The cylinder (301) is located between the second side plate (202) and the third side plate (203). A top plate (302) is fixedly installed on the top of the cylinder (301). A first limiting rod (303) is slidably installed on both sides of the top of the top of the top plate (302). The tops of the two sets of first limiting rods (303) are fixedly connected to both sides of the bottom of the placement platform (2).

5. The high-precision automotive PCB positioning device based on CCD secondary drilling positioning according to claim 4, characterized in that: The top plate (302) has two fixedly installed first hinge members (304) on both sides of its top end. The inner sides of the two sets of first hinge members (304) are rotatably installed with crank rods (305). The inner sides of the two sets of crank rods (305) are provided with limit grooves (306). The top sides of the second side plate (202) have two fixedly installed connecting frames (307). The two sets of connecting frames (307) are fixedly connected with a connecting rod (308). The two ends of the surface of the connecting rod (308) are respectively movably inserted into the inner sides of the two sets of limit grooves (306).

6. The high-precision automotive PCB positioning device based on CCD secondary drilling positioning according to claim 5, characterized in that: The top ends of both sets of curved rods (305) are fixedly connected to second limiting rods (309), and the bottom ends of the two sets of second limiting rods (309) away from the two sets of curved rods (305) are fixedly connected to first positioning blocks (310). The two sets of first positioning blocks (310) are located on both sides of the top end of the placement platform (2), and the first positioning blocks (310) move in the vertical direction.

7. The high-precision automotive PCB positioning device based on CCD secondary drilling positioning according to claim 4, characterized in that: A crossbar (312) is rotatably mounted on the inner side of each of the two sets of second hinge members (311). A spring (313) is fixedly connected to the top of the end of each of the two sets of crossbars (312) away from the second hinge member (311). The top of each of the two sets of springs (313) is fixedly connected to both sides of the bottom of the placement platform (2). An abutment block (314) is fixedly mounted on the bottom of each of the two sets of crossbars (312). Both sets of abutment blocks (314) are located above the top plate (302). At the end away from the two sets of first hinges (304), the top of the two sets of horizontal bars (312) near the end of the two sets of second hinges (311) is fixedly connected with vertical bars (315). A second positioning block (316) is fixedly installed on one side of the top of the two sets of vertical bars (315). The two sets of second positioning blocks (316) are located at the two ends of the placement platform (2) away from the two sets of first positioning blocks (310), and the two sets of second positioning blocks (316) are arranged horizontally.

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