High-precision printed circuit board processing method

Abstract

The invention provides a high-precision printed circuit board processing method. The high-precision printed circuit board processing method comprises the following steps: S1, manufacturing a high-precision printed circuit board positioning bottom plate through a material removal method; s2, manufacturing key components of the high-precision printed circuit board positioning system; s3, assembling and debugging the high-precision printed circuit board positioning system to ensure that the system function is intact and effective; s4, the high-precision printed circuit board positioning system is placed on the table top of the numerical control machine tool, and installation is firm, reliable and free of looseness; s5, the X-direction clamping device and the Y-direction clamping device are adjusted to proper positions according to the specification and size of the product to be machined; s6, the to-be-machined product is placed on the positioning bottom plate, the X-direction clamping device and the Y-direction clamping device are started, and meanwhile the first positioning mechanism and the second positioning mechanism are utilized to achieve positioning, clamping and fixing of the to-be-machined product; and S7, the numerical control machine tool machining instruction is executed, and machining of the to-be-machined product is completed. The device is easy to operate, convenient and flexible to use and low in manufacturing, repairing and maintaining cost.

Description

Technical Field

[0001] The present invention relates to the technical field of high-precision printed circuit board manufacturing, and more particularly, to a processing method for high-precision printed circuit boards. Background Art

[0002] As is well known, high-precision printed circuit boards have high requirements in terms of safety, reliability, stability, green environmental protection, etc., especially in the ten key industrial fields that the country focuses on developing, including automotive, new energy, industrial control, medical, aerospace, military, robotics, and high-grade CNC machine tools. The service performance requirements for circuit boards are even more stringent. At the same time, in today's increasingly competitive market, rapid, efficient, and high-quality production is an important measure for enterprises to enhance their core competitiveness in the international arena, and ensuring continuous and stable production order is an important guarantee. As the aperture of the circuit board becomes smaller and smaller, the diameter of the cutting tools used becomes smaller and smaller, and the hole position accuracy and quality requirements become higher and higher. There are strict technical requirements for the status of tooling fixtures such as cover plates and backing plates used in the drilling process, including the status of process holes and functional holes, the accuracy of positioning holes, the surface status of cover / backing plates, the size specifications, and the processing efficiency of positioning holes. Any carelessness will directly lead to a series of problems that seriously affect production order and quality, such as tool breakage, deviation, abnormal hole shape, product waste, and equipment failure. Most of the existing technical solutions use a punching and cutting method to process process holes on the cover plate and backing plate that match the product drilling positioning pins, and most of them are square holes. The main problems of this method are low efficiency, poor accuracy, and there are often burrs, curls, unevenness, surface fingerprints, oil stains, etc. on the edges of the punched holes or grooves, posing a huge hidden danger to product quality and production order. Summary of the Invention

[0003] In view of the above-mentioned technical problems, a processing method for high-precision printed circuit boards is provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A processing method for high-precision printed circuit boards includes the following steps:

[0006] S1. Fabricate a high-precision printed circuit board positioning base plate by a material removal method;

[0007] S2. Fabricate the key components of the high-precision printed circuit board positioning system. The positioning system includes an X-direction clamping device, a Y-direction clamping device, a first positioning mechanism, and a second positioning mechanism that are connected to the positioning base plate and have clamping and positioning functions; both the X-direction clamping device and the Y-direction clamping device include a pressing plate device with detection, positioning, and clamping composite functions;

[0008] S3. Assemble and debug the high-precision printed circuit board positioning system to ensure that the system functions properly and effectively;

[0009] S4. Place the high-precision printed circuit board positioning system on the numerical control machine table, and install it firmly without looseness.

[0010] S5. Adjust the X-direction clamping device and the Y-direction clamping device to appropriate positions according to the size of the product to be processed.

[0011] S6. Place the product to be processed on the positioning base plate, start the X-direction clamping device and the Y-direction clamping device, and at the same time use the first positioning mechanism and the second positioning mechanism to position and clamp the product to be processed.

[0012] S7. Execute the numerical control machine processing instruction to complete the processing of the product to be processed.

[0013] Further, two sets of guide rails are provided on the positioning base plate, namely the first guide rail and the second guide rail. The first guide rail is arranged in the X direction, and the second guide rail is arranged in the Y direction.

[0014] Further, when machining the positioning base plate by the material removal method, ensure that the positioning base plate and the guide rails on it are integrally machined. The upper surface of the guide rail has scales, and the scales are machined by a CO 2 laser numerical control drill. The machining parameters are selected in the APO mode, the pulse width is 20, the number of SHOTs is 22, and the pulse period is 0.5 ms.

[0015] Further, the X-direction clamping device is arranged on the left side of the positioning base plate and includes an X-direction sliding mechanism. The X-direction sliding mechanism is slidably connected to the first guide rail and is used to move the X-direction pressing plate device along the first guide rail.

[0016] The Y-direction clamping device is arranged on the lower side of the positioning base plate and includes a Y-direction sliding mechanism. The Y-direction sliding mechanism is slidably connected to the second guide rail and is used to move the Y-direction pressing plate device along the second guide rail.

[0017] Further, the X-direction sliding mechanism includes a first driving mechanism and an X-direction high-precision positioning and detection device body slidably connected to the first guide rail. The first driving mechanism is connected to the X-direction high-precision positioning and detection device body, and the X-direction pressing plate device is connected to the X-direction high-precision positioning and detection device body. The inner side of the X-direction high-precision positioning and detection device body is used to closely contact the left side of the product to be processed.

[0018] The Y-direction sliding mechanism includes a second driving mechanism and a Y-direction high-precision positioning and detection device body slidably connected to the second guide rail. The second driving mechanism is connected to the Y-direction high-precision positioning and detection device body, and the Y-direction pressing plate device is connected to the Y-direction high-precision positioning and detection device body. The inner side of the Y-direction high-precision positioning and detection device body is used to closely contact the lower side of the product to be processed.

[0019] Further, go - no - go gauges are provided on the inner sides of the main bodies of the X - direction high - precision positioning and detection device and the Y - direction high - precision positioning and detection device that are in contact with the product to be processed.

[0020] Further, a pneumatic device is installed on the positioning base plate, and the pneumatic device is connected to the pressing plate devices in the X - direction and Y - direction, and is used to drive the pressing plate devices to rotate.

[0021] Further, the first positioning mechanism includes a main body of the pressing plate for the angle - block positioning device, and the main body of the pressing plate for the angle - block positioning device is slidably connected to the upper - right corner of the positioning base plate; the second positioning mechanism includes a positioning stop block, and the positioning stop block is installed at the lower - right corner of the positioning base plate; pressing plate mechanisms for positioning and pressing the product to be processed are provided on both the main body of the pressing plate for the angle - block positioning device and the positioning stop block.

[0022] Further, the pressing plate mechanism includes a pressing plate for the angle - block positioning device, a tightening structure, and a clamping structure. One end of the pressing plate for the angle - block positioning device is used to contact and press the product to be processed, and the other end is used to cooperate and connect with the clamping structure; the clamping structures of the two groups of pressing plate mechanisms are respectively installed on the main body of the pressing plate for the angle - block positioning device and the positioning stop block;

[0023] The pressing plates for the angle - block positioning device of the two groups of pressing plate mechanisms are respectively rotatably connected to the main body of the pressing plate for the angle - block positioning device and the positioning stop block; a tightening structure is connected between the side of the pressing plates for the angle - block positioning device of the two groups of pressing plate mechanisms close to the clamping structure and the main body of the pressing plate for the angle - block positioning device and the positioning stop block.

[0024] Further, an elastic positioning stop bar is connected to the end of the pressing plate for the angle - block positioning device that is used to contact and press the product to be processed.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The high - precision printed circuit board processing method provided by the present invention involves the design, research and development, and application of a special positioning device for high - precision printed circuit boards, which can fully overcome the existing problems, and has high efficiency and good effect. The processing efficiency of the cover backing plate process holes is more than 30 times higher than that of the conventional method, and plays an important role in guaranteeing and supporting the product quality. The method of the present invention is applicable to the processing of high - precision printed circuit boards, cover backing plates, and special process circuit boards containing secondary drilling and broken - off gold fingers, etc.

[0027] 2. The high - precision printed circuit board processing method provided by the present invention can realize the positioning and clamping fixation of the product to be processed through the combined use of the positioning base plate, the X - direction clamping device, the Y - direction clamping device, the first positioning mechanism, and the second positioning mechanism, and further complete the processing of the product to be processed.

[0028] 3. The high-precision printed circuit board processing method provided by the present invention realizes the movement of the pressing plate devices on both sides through the sliding connection of the X-direction sliding mechanism with the first guide rail and the sliding connection of the Y-direction sliding mechanism with the second guide rail. And through the sliding of the pressing plate main body of the angle block positioning device, combined with the positioning stop block, the positioning and clamping of workpieces of different sizes are realized.

[0029] 4. The high-precision printed circuit board processing method provided by the present invention is provided with a go-no-go gauge on the inner sides of both the X-direction high-precision positioning and detection device main body and the Y-direction high-precision positioning and detection device main body, which can timely detect the problem of workpiece size out-of-tolerance and take corresponding measures to adjust the position of the workpiece.

[0030] For the above reasons, the present invention can be widely promoted in the fields such as printed circuit board processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a flow chart of the method of the present invention.

[0033] Figure 2 It is an effect diagram of the composition structure of the device of the present invention.

[0034] Figure 3 It is a partial enlarged effect diagram of the device of the present invention.

[0035] Figure 4 It is a top view of the bottom plate of the positioning device of the present invention.

[0036] Figure 5 It is a partial enlarged schematic diagram of the main body of the high-precision positioning and detection device of the present invention.

[0037] In the figure: 1. NC machine tool table; 2. Vacuum pipeline interface; 3. Vacuum pipeline splitter; 4. Splitter pipeline interface; 5. First guide rail; 6. High-precision X-direction adjustment knob; 7. X-direction adjustment knob fixing device; 8. Linear distance transmission screw; 9. Main body of X-direction positioning and clamping device; 10. Pressing plate device; 11. Fastening screw I; 12. Cylinder; 13. Cylinder vacuum pipeline interface; 14. Second guide rail; 15. Positioning base plate; 16. Slideway of angle block positioning device; 17. Pressing plate of angle block positioning device; 18. Pin shaft of pressing plate support of angle block positioning device; 19. Tension limiter of pressing plate of angle block positioning device; 20. Main body of pressing plate of angle block positioning device; 21. Positioning stop block; 22. Main body of Y-direction high-precision positioning and detection device; 23. Main body of X-direction high-precision positioning and detection device; 24. Elastic positioning stop block pressing strip; 25. Spring of positioning stop block support; 26. Slideway of high-precision positioning and detection device; 27. Fixed screw hole; 28. Fastening screw II; 29. Pressing plate support; 30. Go-no-go gauge; 31. Compressed air switch. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, steps, operations, devices, components and / or their combinations.

[0041] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary statements, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0043] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationships of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0044] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0045] Embodiment 1

[0046] The present invention provides a method for processing high-precision printed circuit boards, belonging to the field of manufacturing high-precision printed circuit boards, and particularly relates to the research, design and application of a method for processing high-precision printed circuit boards with leading industry level.

[0047] In view of the existing problems, the present invention innovatively develops a method for processing high-precision printed circuit boards. This method involves the design, research and application of a special positioning device for high-precision printed circuit boards, which can fully overcome the existing problems, and has high efficiency and good effect. The processing efficiency of the process holes of the cover backing plate is more than 30 times higher than that of the conventional method, and plays an important role in ensuring and supporting the product quality. This method is applicable to the processing of high-precision printed circuit boards, cover backing plates and special process circuit boards containing secondary drilling and broken gold fingers.

[0048] The processing method of a high-precision printed circuit board of the present invention includes the following steps:

[0049] Firstly, conduct the research, design and manufacture of a special positioning system for high-precision printed circuit boards. The positioning system for high-precision printed circuit boards involves the design and application of a set of special positioning bottom plates. The special positioning bottom plate is processed by a material removal method to obtain the positioning bottom plate 15, and it is ensured that the positioning bottom plate 15 and the two groups of guide rails on it are integrally processed. The scales on the guide rails are processed by a 2 CO2 laser numerical control drilling machine. The processing parameters are selected in the APO mode, with a pulse width of 20, a SHOT number of 22, and a pulse period of 0.5 ms;

[0050] Then, manufacture key components such as the pneumatic pressing plate device and the positioning and clamping device of the special positioning system for high-precision printed circuit boards. After all the functional components of the positioning system are manufactured, assemble and debug them to ensure they are in good condition and effective.

[0051] The method of the present invention specifically includes the following steps:

[0052] S1. Manufacture the positioning bottom plate 15 of the high-precision printed circuit board by a material removal method;

[0053] S2. Manufacture the key components of the positioning system for high-precision printed circuit boards. The key components include an X-direction clamping device, a Y-direction clamping device, a first positioning mechanism and a second positioning mechanism which have clamping and positioning functions, connected to the positioning bottom plate 15; both the X-direction clamping device and the Y-direction clamping device include a pressing plate device 10 with detection, positioning and clamping composite functions;

[0054] S3. Assemble and debug the positioning system for high-precision printed circuit boards to ensure that the system functions are in good condition and effective;

[0055] S4. Place the positioning system for high-precision printed circuit boards on the numerical control machine tool table, and install it firmly without looseness;

[0056] S5. Adjust the X-direction clamping device and the Y-direction clamping device to appropriate positions according to the size specifications of the product to be processed;

[0057] S6. Place the product to be processed on the positioning base plate 15, start the X-direction clamping device and the Y-direction clamping device, and at the same time use the first positioning mechanism and the second positioning mechanism to achieve the positioning and clamping fixation of the product to be processed;

[0058] S7. Execute the numerical control machine tool processing instruction to complete the processing of the product to be processed.

[0059] This positioning system of the present invention can perform high-precision, high-speed, and high-quality processing on the product to be processed (such as the process holes on the cover backing plate used) during the numerical control processing of high-precision printed circuit boards. This method can fully overcome the problems existing in the conventional technology, and has high efficiency and good effect. The processing efficiency of the process holes on the cover backing plate is more than 30 times higher than that of the conventional method, which plays an important role in ensuring and supporting the product quality. The method of the present invention is applicable to the processing of high-precision printed circuit boards, cover backing plates, and special process circuit boards containing secondary drilling and broken gold fingers, etc.

[0060] Embodiment 2

[0061] A processing method for high-precision printed circuit boards of the present invention includes the following steps:

[0062] S1. Manufacture a special positioning base plate for high-precision printed circuit boards, which has special linear slideways, guide grooves, screw holes, etc.;

[0063] S2. Then manufacture the key components of the special positioning system for high-precision printed circuit boards, and the key components include a special pressing plate device with detection, positioning, and clamping composite functions, a special positioning stop block with clamping and positioning functions, etc.;

[0064] S3. Assemble and debug the positioning system for high-precision printed circuit boards to ensure that the system functions properly and effectively.

[0065] The specific implementation method is as follows:

[0066] 1. Process the positioning base plate 15 by the material removal method, and ensure that the positioning base plate 15 and the two groups of guide rails on it are integrally processed and formed. The scales on the guide rails are processed by a CO 2 laser numerical control drill, and the processing parameters are selected in the APO mode, with a pulse width of 20, a SHOT number of 22, and a pulse period of 0.5 ms;

[0067] 2. Process relevant components according to the names and quantities of the main functional components of the high-precision printed circuit board positioning system (high-precision positioning and detection device) to ensure that the dimensions, specifications, structures, and accuracies all meet the technical requirements; the positioning system includes an X-direction clamping device, a Y-direction clamping device, and a first positioning mechanism and a second positioning mechanism with clamping and positioning functions connected to the positioning base plate 15; both the X-direction clamping device and the Y-direction clamping device include a pressing plate device 10 with detection, positioning, and clamping composite functions.

[0068] 3. Assemble and debug the high-precision printed circuit board positioning and detection device to ensure its effective function.

[0069] 4. Place the high-precision printed circuit board positioning system on the numerical control machine tool table, and the installation should be firm and reliable without looseness.

[0070] 5. Adjust the XY-direction clamping device to a suitable position according to the size and specifications of the product to be processed.

[0071] 6. Place the product to be processed on the floating table (positioning base plate 15) and start the clamping device.

[0072] 7. Execute the numerical control machine tool processing instructions, and the subsequent processing steps can be completed according to the conventional general processing method to complete the processing of the product to be processed.

[0073] Preferably, the positioning base plate 15 is machined by the material removal method, and it is ensured that the positioning base plate 15 and the two groups of guide rails on it are integrally machined. The scales on the guide rails are machined by a CO 2 laser numerical control drill, and the APO mode is selected for the processing parameters, with a pulse width of 20, a SHOT number of 22, and a pulse period of 0.5 ms.

[0074] Preferably, there are two groups of guide rails on the positioning base plate 15, namely the first guide rail and the second guide rail. The first guide rail is arranged in the X direction, and the second guide rail is arranged in the Y direction.

[0075] Preferably, the X-direction clamping device is arranged on the left side of the positioning base plate 15 and includes an X-direction sliding mechanism. The X-direction sliding mechanism is slidably connected to the first guide rail and is used to move the pressing plate device 10 in the X direction along the first guide rail.

[0076] The Y-direction clamping device is arranged on the lower side of the positioning base plate 15 and includes a Y-direction sliding mechanism. The Y-direction sliding mechanism is slidably connected to the second guide rail and is used to move the pressing plate device 10 in the Y direction along the second guide rail.

[0077] Preferably, the X-direction sliding mechanism includes a first driving mechanism and an X-direction high-precision positioning and detection device main body 23 slidably connected to the first guide rail. The first driving mechanism is connected to the X-direction high-precision positioning and detection device main body 23. The X-direction pressing plate device 10 is connected to the X-direction high-precision positioning and detection device main body 23. The inner side of the X-direction high-precision positioning and detection device main body 23 is used to closely contact the left side of the product to be processed.

[0078] The Y-direction sliding mechanism includes a second driving mechanism and a Y-direction high-precision positioning and detection device main body 22 slidably connected to the second guide rail. The second driving mechanism is connected to the Y-direction high-precision positioning and detection device main body 22. The Y-direction pressing plate device 10 is connected to the Y-direction high-precision positioning and detection device main body 22. The inner side of the Y-direction high-precision positioning and detection device main body 22 is used to closely contact the lower side of the product to be processed.

[0079] Preferably, go-no-go gauges 30 are provided on the inner sides of the X-direction high-precision positioning and detection device main body 23 and the Y-direction high-precision positioning and detection device main body 22 that contact the product to be processed.

[0080] Preferably, a pneumatic device is installed on the positioning base plate 15. The pneumatic device is connected to the pressing plate devices 10 in the X and Y directions and is used to drive the pressing plate devices 10 to rotate.

[0081] Preferably, the first positioning mechanism includes a corner block positioning device pressing plate main body 20, and the corner block positioning device pressing plate main body 20 is slidably connected to the upper right corner of the positioning base plate 15; the second positioning mechanism includes a positioning stop block 21, and the positioning stop block 21 is installed at the lower right corner of the positioning base plate 15; pressing plate mechanisms for positioning and pressing the product to be processed are provided on both the corner block positioning device pressing plate main body 20 and the positioning stop block 21.

[0082] Preferably, the pressing plate mechanism includes a corner block positioning device pressing plate 17, a top pressing structure, and a clamping structure. One end of the corner block positioning device pressing plate 17 is used to contact and press the product to be processed, and the other end is used to cooperate and connect with the clamping structure; the clamping structures of the two groups of pressing plate mechanisms are respectively installed on the corner block positioning device pressing plate main body 20 and the positioning stop block 21;

[0083] The corner block positioning device pressing plates 17 of the two groups of pressing plate mechanisms are respectively rotatably connected to the corner block positioning device pressing plate main body 20 and the positioning stop block 21; a top pressing structure is connected between the corner block positioning device pressing plates 17 of the two groups of pressing plate mechanisms and the corner block positioning device pressing plate main body 20 and the positioning stop block 21 on the side close to the clamping structure.

[0084] Preferably, an elastic positioning stop block pressing strip 24 is connected to one end of the corner block positioning device pressing plate 17 that is used to contact and press the product to be processed.

[0085] Embodiment 3

[0086] Different from Embodiment 2, in this embodiment, when the positioning base plate 15 is used, it is laid flat on the table surface 1 (workbench surface) of the numerical control machine tool, and the workpiece is placed on the positioning base plate 15. A set of linear guide rails (the first guide rail 5 and the second guide rail 14) are provided in each of the X direction and the Y direction of the positioning base plate 15. The linear guide rails are integrally formed with the positioning base plate 15, and the upper surface of the linear guide rail is provided with scale lines, and the scale lines are made by CO 2 laser numerical control drilling machine processing, and the processing parameters are selected in the APO mode, the pulse width is 20, the number of SHOTs is 22, and the pulse period is 0.5 ms. That is, the upper surfaces of the first guide rail 5 and the second guide rail 14 are both provided with scale rulers made by laser, and the scale rulers are composed of a plurality of scale lines. There are two first guide rails 5 and two second guide rails 14 respectively. The two first guide rails 5 are arranged in parallel, and the two second guide rails 14 are arranged in parallel. The two sets of linear guide rails are arranged vertically in the X direction and the Y direction as shown in the figure, and a high-precision positioning and detection device slideway 26 is arranged between each set of linear guide rails.

[0087] The X-direction clamping device includes an X-direction sliding mechanism and a pressing plate device 10. The X-direction sliding mechanism includes a first driving mechanism, an X-direction high-precision positioning and detection device main body 23. The first driving mechanism includes a high-precision X-direction adjustment knob 6, an X-direction adjustment knob fixing device 7, a linear distance transmission screw 8, an X-direction positioning and clamping device main body 9, and a high-precision positioning and detection device slideway 26. The X-direction high-precision positioning and detection device main body 23 is slidably connected to the first guide rail 5 and is connected to the X-direction positioning and clamping device main body 9. The X-direction positioning and clamping device main body 9 is cooperatively connected in the high-precision positioning and detection device slideway 26. The high-precision positioning and detection device slideway 26 is opened on the positioning base plate 15. One side of the linear distance transmission screw 8 is connected to the X-direction positioning and clamping device main body 9, and the other side penetrates through the positioning base plate 15 and is connected to the high-precision X-direction adjustment knob 6. The high-precision X-direction adjustment knob 6 is installed on the positioning base plate 15 through the X-direction adjustment knob fixing device 7; the upper end of the pressing plate device 10 is connected to the upper side of the X-direction high-precision positioning and detection device main body 23 through a fastening screw I 11, and a cylinder 12 of a pneumatic device is connected to the lower side of the X-direction high-precision positioning and detection device main body 23 through a fastening screw I 11. The output end of the cylinder 12 is connected to the lower end of the pressing plate device 10 for driving the pressing plate device 10 to press the left side of the workpiece. The high-precision positioning and detection device slideway 26 in the X direction cooperates with the X-direction positioning and clamping device main body 9, and realizes the distance transmission function through the linear distance transmission screw 8 and the X-direction adjustment knob fixing device 7. In actual application, the position of the pressing plate device 10 is adjusted through the high-precision X-direction adjustment knob 6.

[0088] The Y-direction clamping device includes a Y-direction sliding mechanism and a pressing plate device 10. The Y-direction sliding mechanism includes a second driving mechanism and a main body 22 of the Y-direction high-precision positioning and detection device. The structure of the second driving mechanism is the same as that of the first driving mechanism, and it includes a main body of the Y-direction positioning and clamping device, a high-precision Y-direction adjustment knob, a fixing device for the Y-direction adjustment knob, a linear distance transmission screw 8, a main body 22 of the Y-direction high-precision positioning and detection device, and a slideway 26 of the high-precision positioning and detection device. The main body 22 of the Y-direction high-precision positioning and detection device is slidably connected to the second guide rail 14 and is connected to the main body of the Y-direction positioning and clamping device. The main body of the Y-direction positioning and clamping device is cooperatively connected in the slideway 26 of the high-precision positioning and detection device. The slideway 26 of the high-precision positioning and detection device is provided on the positioning bottom plate 15. One side of the linear distance transmission screw 8 is connected to the main body of the Y-direction positioning and clamping device, and the other side penetrates through the positioning bottom plate 15 and is connected to the high-precision Y-direction adjustment knob. The high-precision Y-direction adjustment knob is installed on the positioning bottom plate 15 through the fixing device for the Y-direction adjustment knob. The right end of the pressing plate device 10 is rotatably connected to the right side of the main body 22 of the Y-direction high-precision positioning and detection device through a fastening screw I 11. Another cylinder 12 of the pneumatic device is connected to the left side of the main body 22 of the Y-direction high-precision positioning and detection device through a fastening screw I 11. The output end of the cylinder 12 is connected to the left end of the pressing plate device 10 and is used to drive the pressing plate device 10 to press the lower side of the workpiece. The slideway 26 of the high-precision positioning and detection device in the Y-direction cooperates with the main body of the Y-direction positioning and clamping device, and realizes the distance transmission function through the linear distance transmission screw 8 and the fixing device for the Y-direction adjustment knob. In practical applications, the position of the pressing plate device 10 in the Y-direction is adjusted through the high-precision Y-direction adjustment knob.

[0089] A go-no-go gauge 30 is provided inside both the main body 23 of the X-direction high-precision positioning and detection device and the main body 22 of the Y-direction high-precision positioning and detection device. The go-no-go gauge 30 is a functional gauge for detecting the size of the workpiece, which can timely detect the problem of the workpiece size exceeding the tolerance, and take corresponding measures to adjust the position of the workpiece.

[0090] There is a precision fine-thread screw hole at the bottom center position of the main body 9 of the X-direction positioning and clamping device. The precision fine-thread screw hole cooperates with the linear distance transmission screw 8, and the main body 9 of the X-direction positioning and clamping device cooperates with the positioning bottom plate 15. There is a cylinder 12 of the pneumatic device on the side of the main body 9 of the X-direction positioning and clamping device, and a pressing plate device 10 on the side. A gauge detection platform (go-no-go gauge 30) is provided on the side close to the workpiece. This device can realize the precise positioning of the workpiece in the X-direction and the control of the X-direction size of the workpiece.

[0091] There is a precision fine-thread screw hole at the bottom center of the main body of the Y-direction positioning and clamping device. The precision fine-thread screw hole cooperates with the linear transmission screw 8, and the main body of the Y-direction positioning and clamping device cooperates with the positioning base plate 15. There is a cylinder 12 of the pneumatic device on the side of the main body of the Y-direction positioning and clamping device, a pressing plate device 10 on the side, and a gauge detection platform (go / no-go gauge 30) is provided on the side close to the workpiece. This device can achieve precise positioning of the workpiece in the Y direction and control of the Y-direction dimension size.

[0092] The pneumatic device includes a vacuum pipeline interface 2, a vacuum pipeline splitter 3, a splitter pipeline interface 4, two cylinders 12, a cylinder vacuum pipeline interface 13, and a compressed air switch 31. The two cylinders 12 are respectively connected to the pressing plate devices 10 of the X-direction clamping device and the Y-direction clamping device. The compressed air switch 31 is arranged on the lower left corner side of the multi-functional positioning base plate 15 and can control the cylinder 12 to perform opening or closing actions. There is a vacuum pipeline splitter 3 at the lower left corner of the multi-functional positioning base plate 15. The vacuum pipeline splitter 3 is provided with two splitter pipeline interfaces 4, and the opening or closing of the XY-direction positioning device can be controlled through a connecting pipe. Specifically, a vacuum pipeline interface 2 is provided at the lower left end of the positioning base plate 15. The vacuum pipeline interface 2 is connected to an external vacuum device. The vacuum pipeline interface 2 is connected to one side of the compressed air switch 31, and the other side of the compressed air switch 31 is connected to the vacuum pipeline splitter 3. The vacuum pipeline splitter 3 is provided with two splitter pipeline interfaces 4, and the two splitter pipeline interfaces 4 are respectively connected to the cylinder vacuum pipeline interfaces 13 on the two cylinders 12 through pipelines. The cylinder 12 and the pressing plate device 10 can be provided with driving force through the vacuum pipeline splitter 3, the splitter pipeline interface 4, and the cylinder vacuum pipeline interface 13. There is an elastic positioning stop strip 24 at the end of the pressing plate device 10, which can make the workpiece closely fit with the table surface to ensure the pressing effect. The pressing plate device 10 can be a horizontally long pressing plate strip structure. In this embodiment, the piston rod of the cylinder 12 can be hinged with a connecting rod, and the connecting rod is connected to the other end of the pressing plate device 10. Through the telescopic movement of the piston rod, the reciprocating rotation of the pressing plate device 10 is realized.

[0093] The first positioning mechanism includes the corner block positioning device pressing plate main body 20 and the pressing plate mechanism. The second positioning mechanism includes the positioning stop block 21 and the pressing plate mechanism. The positioning stop block 21 is arranged at the lower right corner of the positioning bottom plate 15 and can limit the freedom degree of the workpiece in the X direction. The pressing plate mechanisms arranged on the corner block positioning device pressing plate main body 20 and the positioning stop block 21 can realize the dual functions of positioning and pressing, and the workpiece contacts the inner sides of the corner block positioning device pressing plate main body 20 and the positioning stop block 21. The corner block positioning device slideway 16 (with a width of 20 mm and a length of 150 - 200 mm) is provided at the upper right corner of the positioning bottom plate 15. The corner block positioning device slideway 16 is used in cooperation with the corner block positioning device pressing plate main body 20. Among them, the corner block positioning device pressing plate main body 20 is cooperatively connected in the corner block positioning device slideway 16. The corner block positioning device pressing plate main body 20 is arranged at the upper right end of the positioning bottom plate 15 to limit the freedom degrees of the workpiece in the X direction and the Y direction. The corner block positioning device pressing plate main body 20 can move up and down along the corner block positioning device slideway 16.

[0094] The pressing plate mechanism includes the corner block positioning device pressing plate 17, the corner block positioning device pressing plate support shaft pin 18, the pressing plate support 29, the pressing structure and the clamping structure. The pressing structure uses the positioning stop block support spring 25. The clamping structure includes the corner block positioning device pressing plate tension limiter 19, the fastening screw II 28. The upper surfaces of the corner block positioning device pressing plate body 20 and the positioning stop block 21 are both provided with the corner block positioning device pressing plate support shaft pin 18 and the pressing plate support 29. The corner block positioning device pressing plate support shaft pin 18 connects the pressing plate supports 29 on both sides. Above the corner block positioning device pressing plate support shaft pin 18 is the corner block positioning device pressing plate 17. The pressing plate support 29 is connected to the corner block positioning device pressing plate 17 through the corner block positioning device pressing plate support shaft pin 18. The corner block positioning device pressing plates 17 of the two groups of pressing plate mechanisms are respectively rotationally connected to the corner block positioning device pressing plate body 20 and the positioning stop block 21 through the corner block positioning device pressing plate support shaft pin 18. The right side of the corner block positioning device pressing plate 17 cooperates with the corner block positioning device pressing plate tension limiter 19. The bottoms of the corner block positioning device pressing plate tension limiters 19 of the two groups of pressing plate mechanisms are respectively fixed on the corner block positioning device pressing plate body 20 and the positioning stop block 21 through the screw fastening screw II 28. The rest of the corner block positioning device pressing plate tension limiter 19 is designed with a serrated limiting card slot near the pressing plate side. The right side of the corner block positioning device pressing plate 17 has a tip, and this tip cooperates with the limiting card slot for clamping. The left end of the corner block positioning device pressing plate 17 is connected to the elastic positioning stop block pressing strip 24 for contacting and pressing the workpiece. There is a positioning stop block support spring 25 between the corner block positioning device pressing plate 17 and the positioning stop block 21, which can make the elastic positioning stop block pressing strip 24 closely adhere to the workpiece. The pressing state is controlled by the corner block positioning device pressing plate tension limiter 19 on the right side. The positioning stop block support spring 25 is located between the pressing plate support 29 and the corner block positioning device pressing plate tension limiter 19. Both the corner block positioning device pressing plate body 20 and the positioning stop block 21 are provided with fixing screw holes 27. The fixing screw holes 27 are internally connected with the fastening screw II 28 in a matching manner. The corner block positioning device pressing plate tension limiters 19 of the two groups of pressing plate mechanisms are respectively connected to the corner block positioning device pressing plate body 20 and the positioning stop block 21 through the fastening screw II 28. The corner block positioning device pressing plate tension limiter 19 is fixed through the fastening screw II 28 and the fixing screw hole 27. To enable the pressing plate function of the device, the corner block positioning device pressing plate tension limiter 19 can be moved to the right. To close the pressing plate function, the right end of the corner block positioning device pressing plate 17 can be pressed by hand.

[0095] The present invention can be used for the high-precision processing of high-precision printed circuit boards, secondary drilling boards, and various cover cushion boards. The processing accuracy can be improved by more than 30% compared with the normal method. Especially for the processing of cover cushion boards, the number of stacked layers can reach 50 - 100 layers, and the processing efficiency is more than 30 times faster than the conventional method. Moreover, the processing effect and accuracy far exceed the conventional method. This device is simple to operate, convenient and flexible to use, and has low manufacturing, repair, and maintenance costs.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision printed circuit board processing method, characterized in that: The steps include: S1, manufacturing a high-precision printed circuit board positioning base plate (15) by a material removal method; S2, a key component of a positioning system for a high-precision printed circuit board, the positioning system comprising an X-axis clamping device, a Y-axis clamping device, and a first positioning mechanism and a second positioning mechanism having clamping and positioning functions connected to a positioning base plate (15); the X-axis clamping device and the Y-axis clamping device both comprise a pressure plate device (10) having a detection, positioning, and clamping composite function; S3. Assemble and debug the high-precision printed circuit board positioning system to ensure that the system functions intact and effectively; S4. Place the high-precision printed circuit board positioning system on the CNC machine table, and install it firmly and reliably without looseness; S5. Adjust the X-axis clamping device and the Y-axis clamping device to appropriate positions according to the size of the product to be processed; S6, placing the product to be processed on the positioning base plate (15), and starting the X-axis clamping device and the Y-axis clamping device, while using the first positioning mechanism and the second positioning mechanism to achieve positioning and clamping of the product to be processed; S7. Execute the CNC machine tool processing instructions to complete the processing of the product to be processed.

2. The high-precision printed circuit board processing method according to claim 1, characterized in that: The positioning base plate (15) is provided with two sets of guide rails, namely a first guide rail and a second guide rail. The first guide rail is arranged in the X direction, and the second guide rail is arranged in the Y direction.

3. The high-precision printed circuit board processing method according to claim 2, characterized in that: When the positioning base plate (15) is processed by the material removal method, it is ensured that the positioning base plate (15) and the guide rail thereon are integrally processed and formed, and the guide rail has a scale on the top, which is processed by a CO2 laser CNC drilling machine, and the processing parameters are selected as APO mode, pulse width 20, SHOT number 22, and pulse period 0.5ms.

4. The high-precision printed circuit board processing method according to claim 2, characterized in that: The X-direction clamping device is arranged on the left side of the positioning base plate (15), and comprises an X-direction sliding mechanism, wherein the X-direction sliding mechanism is slidably connected to the first guide rail and is used to realize the movement of the X-direction pressing plate device (10) along the first guide rail; The Y-direction clamping device is arranged on the lower side of the positioning base plate (15), and comprises a Y-direction sliding mechanism, which is slidably connected to the second guide rail and is used to realize the movement of the Y-direction pressing plate device (10) along the second guide rail.

5. The high-precision printed circuit board processing method according to claim 4, characterized in that: The X-direction sliding mechanism comprises a first driving mechanism and an X-direction high-precision positioning and detection device body (23) slidably connected to the first guide rail, the first driving mechanism is connected to the X-direction high-precision positioning and detection device body (23), the X-direction pressing plate device (10) is connected to the X-direction high-precision positioning and detection device body (23), and the inner side of the X-direction high-precision positioning and detection device body (23) is used to be in close contact with the left side of the product to be processed; The Y-direction sliding mechanism comprises a second driving mechanism and a Y-direction high-precision positioning and detection device body (22) slidably connected to a second guide rail, the second driving mechanism is connected to the Y-direction high-precision positioning and detection device body (22), a Y-direction pressure plate device (10) is connected to the Y-direction high-precision positioning and detection device body (22), and the inner side of the Y-direction high-precision positioning and detection device body (22) is used to be in close contact with the lower side of the product to be processed.

6. The high-precision printed circuit board processing method according to claim 5, characterized in that: The inner sides of the X-axis high-precision positioning and detection device body (23) and the Y-axis high-precision positioning and detection device body (22) that are in contact with the product to be processed are both provided with go and no-go gauges (30).

7. The high-precision printed circuit board processing method according to claim 1, characterized in that: A pneumatic device is installed on the positioning base plate (15), and the pneumatic device is connected to the pressing plate device (10) in the X direction and the Y direction, and is used to drive the pressing plate device (10) to rotate.

8. The high-precision printed circuit board processing method according to claim 1, characterized in that: The first positioning mechanism comprises a corner block positioning device pressure plate body (20), and the corner block positioning device pressure plate body (20) is slidably connected to the upper right corner of the positioning base plate (15); the second positioning mechanism comprises a positioning stopper (21), and the positioning stopper (21) is installed at the lower right corner of the positioning base plate (15); the corner block positioning device pressure plate body (20) and the positioning stopper (21) are both provided with a pressure plate mechanism for positioning and pressing the product to be processed.

9. The high-precision printed circuit board processing method according to claim 8, characterized in that: The pressing plate mechanism comprises a corner block positioning device pressing plate (17), a pressing structure and a clamping structure; one end of the corner block positioning device pressing plate (17) is used for contacting and clamping the product to be processed, and the other end is used for matching and connecting with the clamping structure; the clamping structures of the two sets of pressing plate mechanisms are respectively mounted on the corner block positioning device pressing plate body (20) and the positioning stopper (21); The corner block positioning device pressing plates (17) of the two sets of pressing plate mechanisms are rotatably connected to the corner block positioning device pressing plate body (20) and the positioning stopper (21) respectively; a tightening structure is connected between the corner block positioning device pressing plate body (20) and the positioning stopper (21) on one side of the corner block positioning device pressing plates (17) of the two sets of pressing plate mechanisms close to the clamping structure.

10. The high-precision printed circuit board processing method according to claim 9, characterized in that: An elastic positioning block pressure strip (24) is connected to one end of the corner block positioning device pressure plate (17) for contacting and pressing the product to be processed.

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