Antenna and PCB surface mounting-welding integrated tool and method thereof
By using an integrated fixture for antenna and PCB board mounting and soldering, combined with heat dissipation through-holes and multi-specification pressure blocks, the accuracy and quality issues in the antenna and PCB board mounting and soldering process are solved, achieving efficient and stable soldering results and reducing costs and operational complexity.
Patent Information
- Application Number
- CN202511572076.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-01-20
AI Technical Summary
Existing technologies for mounting and soldering antennas to PCB boards suffer from problems such as reduced mounting accuracy, unstable soldering quality, reliance on experience in operation, and uneven thermal management, making it difficult to meet the requirements of high precision and high reliability while keeping costs under control.
An integrated antenna and PCB board mounting and soldering fixture is adopted, including a base, a cover plate and a pressure block. It is designed with heat dissipation holes and pressure blocks of various specifications to achieve integrated mounting and soldering. Through mechanized positioning and quantitative pressure control, combined with a multi-dimensional heat transfer system, positioning accuracy and soldering quality are ensured.
It achieves stable mounting accuracy and welding quality for high-frequency equipment, reduces operational complexity and cost, improves processing efficiency and welding consistency, adapts to the needs of different batches and operators, and reduces the risk of incomplete soldering and over-soldering.
Smart Images
Figure CN121368082A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of component packaging, and particularly relates to an antenna and PCB board mounting-welding integrated tool and a method thereof. BACKGROUND
[0002] With the rapid development of electronic devices towards high frequency, high integration and miniaturization, the ball grid array (BGA) packaging technology has become the core of realizing high-performance interconnection of components and printed circuit boards. Especially in the research and development and small batch production stage of large-size components such as antennas, the requirements for mounting precision and welding reliability are extremely strict, which is directly related to the performance and stability of the entire communication system.
[0003] At present, the industry generally adopts a discrete tool, that is, the "precise positioning and mounting" and "welding and solidification" of the antenna are completed in two independent processes. This method has significant drawbacks: first, in the process conversion and workpiece transfer process, the completed mounting precision is easily reduced due to vibration and bumping, resulting in low mounting yield; second, the required pressure for welding generally depends on the experience of the operator for temporary configuration, lacks quantification and controllability, and is prone to defects such as poor solder consistency, virtual welding or component damage. In addition, the design of the traditional tool base usually does not fully consider the uniformity of heat conduction, which further affects the stability of the welding quality.
[0004] Therefore, the prior art is difficult to meet the comprehensive needs of high-precision mounting, quantitative welding pressure and good thermal management at the research and development and small batch stages under the premise of controllable cost. SUMMARY
[0005] The purpose of the embodiment of the application is to provide an antenna and PCB board mounting-welding integrated tool. To solve the problems of easy reduction of mounting precision and unstable welding quality caused by two clamping and process separation in the background art.
[0006] To achieve the above purpose, the following technical solution is adopted: In a first aspect, an antenna and PCB board mounting-welding integrated tool is provided, comprising: a base, the top of which is provided with a placement table for supporting a PCB board, the periphery of the placement table is provided with a PCB fixing groove for positioning the PCB board, and the top of the base is further provided with a boss; a cover plate, which is provided with a groove matched with the boss of the base, and at least one antenna positioning groove for positioning an antenna is formed in the cover plate; a pressing block, which can be placed in the antenna positioning groove and used to apply pressure to the antenna during welding.
[0007] In a possible implementation, the base has a plurality of heat dissipation through holes formed in the base.
[0008] In a possible implementation, the heat dissipation through holes are arranged in an array.
[0009] In a possible implementation, the pressing blocks have different specifications, and the different specifications of the pressing blocks have different masses to realize the quantitative counterweight of the antenna.
[0010] In a possible implementation, the specifications of the pressing blocks include light blocks, medium blocks and heavy blocks with different masses.
[0011] In a possible implementation, the antenna positioning slot is a slot formed in the cover plate and has a shape matched with the shape of the antenna to be attached.
[0012] In a possible implementation, at least one side of the antenna positioning slot is provided with a semicircular identification opening for the direction identification and tweezers clamping of the antenna.
[0013] In a possible implementation, the boss of the base and the groove of the cover plate are clearance fitted, and the fitting tolerance is configured to meet the predetermined attachment accuracy requirement.
[0014] In a possible implementation, the cover plate is provided with four antenna positioning slots and is matched with twelve pressing blocks.
[0015] In a second aspect, a method for the attachment-welding integration of an antenna and a PCB is provided, and the method includes the following steps: S1: placing the PCB on which solder has been printed on the base and positioning the PCB through the PCB fixing slot; S2: buckling the cover plate on the boss of the base through the groove of the cover plate; S3: placing the antenna in the antenna positioning slot of the cover plate in sequence to align the solder ball on the antenna with the pad on the PCB; S4: selecting a suitable pressing block and placing the pressing block in the antenna positioning slot on the top of the antenna according to the required pressure for welding; S5: placing the assembled whole in a welding device to execute a welding process curve to complete the attachment and welding.
[0016] Compared with the prior art, the application has the following beneficial effects: The antenna and PCB board mounting-welding integrated tool provided by the application realizes mounting and welding integration, the base workbench and the fixing groove fix and position the PCB board, the boss and the groove are matched to ensure the positioning of the tool structure, and the positioning deviation of the separate tool process conversion is avoided. The antenna positioning groove and the pressing block realize accurate positioning and pressure application of the antenna, convert the mounting precision into controllable precision of mechanical processing, meet the requirements of high-frequency equipment, and complete two processes without changing the tool, thereby reducing the assembly risk and operation complexity.
[0017] In a possible implementation, the design of the heat dissipation through hole directly aims at the technical pain point of uniform heating of the sample in the welding process. The traditional tool only relies on physical heat transfer, which is easy to cause local overheating or uneven heating of the PCB board. The setting of the heat dissipation through hole constructs a multi-dimensional heat transfer system of “physical conduction + air convection + heat radiation”, effectively improves the uniformity of the heating of the PCB board, avoids the problems of PCB board deformation or uneven melting of the solder caused by temperature difference, and at the same time, the heat dissipation through hole accelerates the heating and cooling rate of the PCB board, shortens the welding cycle, improves the processing efficiency, and the through hole design does not affect the positioning stability of the PCB board. While ensuring the heat transfer performance, the core positioning function of the tool is also considered.
[0018] In a possible implementation, the quantitative control of the welding pressure is realized, the mode of relying on the experience of the operator to adjust the pressure of the traditional tool is broken, the welding pressure of different batches and different operators is kept consistent, the consistency of the welding point quality is significantly improved, and the problems of virtual welding and overwelding caused by improper pressure are reduced. A plurality of specifications of the pressing block can be flexibly combined to adapt to different pin distances, different thicknesses of the antenna and the PCB board combination scene, greatly improve the universality of the tool, do not need to design a special pressing block for each product, and reduce the research and production cost. The standard structure design of the pressing block is convenient for batch production and management, and the frosted bottom design enhances the fitting stability of the pressing block and the antenna, and avoids the antenna deviation caused by the sliding of the pressing block in the welding process.
[0019] A method of an antenna and PCB board mounting-welding integrated tool, the step design makes the operation have direction and repeatability, reduces the threshold, ensures the consistency of the operation quality of different personnel, avoids the quality fluctuation caused by the operation habit. The closed loop formed by the quality inspection of each step reduces the preparation error before welding, and the welding yield is high. The standard welding curve is matched with the tool, the advantages of the tool heat transfer and pressure control are exerted, the welding parameter stability is ensured, and the cycle is shortened. And without expensive automatic equipment, manual operation can realize high-precision processing, and reduce the research and development and small-batch production equipment cost. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The overall structure schematic diagram of the antenna and PCB board mounting-welding integrated tool provided by the application is shown in the figure; Figure 2A structural schematic view of a base provided in the present application is shown in the figure; Figure 3 A structural schematic view of a cover provided in the present application is shown in the figure; Figure 4 A structural schematic view of a light-weight block provided in the present application is shown in the figure; Figure 5 A structural schematic view of a medium-weight block provided in the present application is shown in the figure; Figure 6 A structural schematic view of a heavy-weight block provided in the present application is shown in the figure.
[0021] In the figure, reference numerals: 1, base; 2, briquette; 3, cover; 4, table; 5, heat dissipation through hole; 6, PCB fixing groove; 7, boss; 8, antenna positioning groove; 9, groove; 10, light-weight block; 11, medium-weight block; 12, heavy-weight block. DETAILED DESCRIPTION
[0022] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.
[0023] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0024] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0025] In this application, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and like terms are to be construed as broadly as possible, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, and can also be communication; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0026] In this application, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and like terms are to be construed as broadly as possible, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, and can also be communication; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0028] As shown in Figure 1 and Figure 2 The antenna and PCB board mounting-welding integrated tool of the present application can include a base 1, a cover plate 3 and a pressing block 2.
[0029] The top of the base 1 is provided with a rest table 4 for supporting the PCB board, and the periphery of the rest table 4 is provided with a PCB fixing groove 6 for positioning the PCB board. The top of the base 1 is also provided with a boss 7.
[0030] The cover plate 3 is provided with a groove 9 matched with the boss 7 of the base 1, and at least one antenna positioning groove 8 for positioning the antenna is formed on the cover plate 3.
[0031] The pressing block 2 can be placed in the antenna positioning groove 8 for applying pressure to the antenna during welding.
[0032] The rest table 4 on the top of the base 1 can be designed as a square structure of 45.5mm x 45.5mm, which is completely matched with the outer dimensions of the PCB board to be mounted.
[0033] A PCB fixing groove 6 with a depth of 1.5 mm and a width of 2 mm is machined around the periphery of the placement platform 4 to ensure that the PCB is not displaced laterally after being placed. Meanwhile, a boss 7 with a height of 5 mm and a cross-sectional size of 8 mm x 8 mm is machined at each of the four corners on the top of the base 1.
[0034] A recess 9 with a depth of 5.2 mm and a cross-sectional size of 8.2 mm x 8.2 mm is machined at a position corresponding to the boss 7 on the cover plate 3 to ensure that the boss 7 can be precisely inserted into the recess 9.
[0035] Four antenna positioning grooves 8 with a size of 14.5 mm x 14.5 mm are formed in the central region of the cover plate 3 to match the shape of the antenna to be mounted.
[0036] The pressing block 2 can be made of solid 2A12 aluminum alloy and initially machined into a general square structure, which can be adjusted in quality as needed later.
[0037] During assembly, the PCB plate pre-printed with solder is first placed on the placement platform 4 of the base 1, with the edges of the PCB plate inserted into the PCB fixing groove 6 to achieve positioning. Then, the recess 9 of the cover plate 3 is aligned with the boss 7 of the base 1 to complete the assembly of the base 1 and the cover plate 3. Finally, according to the welding pressure requirement, the pressing block 2 is placed in the antenna positioning groove 8, and the welding process can be performed.
[0038] In the embodiments of the present application, the mounting and welding are integrated, the placement platform 4 and the fixing groove of the base 1 stably position the PCB plate, the boss 7 and the recess 9 are matched to ensure the positioning of the tooling structure, and the positioning deviation caused by the conversion of the separate tooling process is avoided. The antenna positioning groove 8 and the pressing block 2 realize the precise alignment and pressure application of the antenna, convert the mounting precision into controllable precision of mechanical processing, meet the requirements of high-frequency equipment, and complete two processes without changing tooling, reducing the assembly risk and operation complexity.
[0039] In a possible embodiment, a plurality of heat dissipation through holes 5 are formed on the placement platform 4 of the base 1.
[0040] The 9 heat dissipation through holes 5 are formed on the placement platform 4 by drilling process.
[0041] The diameter of the heat dissipation through hole 5 is set to 3 mm, arranged in a 3 x 3 array, the center distance between adjacent through holes is 12 mm, and the position of the through hole avoids the key pad area on the PCB to avoid affecting the welding point.
[0042] The workpiece of assembling the PCB, the cover plate 3 and the pressing block 2 is placed into the vacuum eutectic furnace, and the furnace table is set to 220 DEG C. During the heating process, part of the heat of the furnace table is conducted to the placing table 4 through the solid part of the base 1, and the other part is transmitted to the PCB in the form of hot air convection and thermal radiation through the heat dissipation through hole 5.
[0043] In the embodiment of the present application, the design of the heat dissipation through hole 5 directly aims at the technical pain point of uniformity of sample heating during welding. The traditional tool only relies on solid heat conduction, which is easy to cause local overheating or uneven heating of the PCB, while the arrangement of the heat dissipation through hole 5 builds a multi-dimensional heat transfer system, effectively improves the uniformity of the PCB heating, avoids the problem of PCB deformation or uneven melting of the solder caused by temperature difference, and at the same time, the heat dissipation through hole 5 speeds up the heating and cooling rate of the PCB, shortens the welding cycle, improves the processing efficiency, and the through hole design does not affect the positioning stability of the PCB, which guarantees the heat transfer performance while taking into account the core positioning function of the tool.
[0044] In a possible embodiment, the number of heat dissipation through holes 5 is multiple and arranged in an array.
[0045] On the placing table 4, 9 heat dissipation through holes 5 are arranged in a 3x3 array, wherein the middle one is located at the geometric center of the placing table 4, and the remaining 8 through holes are located around the center through hole, the center distance of adjacent through holes is uniformly set to 15mm, and the distance between the edge of each through hole and the edge of the placing table 4 is not less than 5mm, and the distance from each through hole to the PCB fixing groove 6 is not less than 3mm.
[0046] In the embodiment of the present application, the array distribution makes the through holes uniformly cover the placing table 4, so that the heating of each area of the PCB is consistent, solves the problem of insufficient heat transfer of random distribution, improves the stability of solder joint quality, and is suitable for temperature sensitive scenes such as BGA packaging. The fixed distance and edge distance design avoids the decrease of tool strength and interference with the fixing groove and the solder pad, ensures the practicability and compatibility, and also facilitates batch processing and reduces process complexity.
[0047] In a possible embodiment, the pressing block 2 has multiple different specifications, and the pressing blocks 2 with different specifications have different masses to realize quantitative counterweight of the antenna.
[0048] Three different mass specifications are designed: the light block 10 has a mass of 10g, the medium block 11 has a mass of 30g, and the heavy block 12 has a mass of 50g.
[0049] Each specification of the pressing block 2 is processed into a square structure with a size of 14mmx14mmx corresponding thickness, the light block 10 has a thickness of 2mm, the medium block 11 has a thickness of 5mm, and the heavy block 12 has a thickness of 10mm, and the bottom is treated with frosted glass to increase the friction force with the surface of the antenna and prevent the pressing block 2 from sliding during welding.
[0050] In the welding of different types of antennas, the combination of the pressure block 2 is selected according to the solder characteristics and the antenna size: For a fine-pitch antenna with a pin pitch of 0.5 mm, two light blocks 10 are stacked, and the total pressure is controlled at 20 g; For an ordinary-pitch antenna, one medium block 11 is used, and the pressure is 30 g; For an antenna with a large thickness, one heavy block 12 is used, and the pressure is 50 g. It is found through pressure sensor monitoring that the pressure error of different combinations of the pressure block 2 is controlled within ±0.2 g.
[0051] In the embodiments of the present application, the quantitative control of the welding pressure is realized, the mode of relying on the experience of the operator to adjust the pressure in the traditional tooling is broken, the welding pressure of different batches and different operators is kept consistent, the consistency of the quality of the welding points is significantly improved, the problems of virtual welding and overwelding caused by improper pressure are reduced; the various specifications of the pressure block 2 can be flexibly combined to adapt to the combination scenarios of different pin pitches, different thicknesses of the antenna and the PCB board, the universality of the tooling is greatly improved, there is no need to design a special pressure block 2 for each product, and the research and development and production costs are reduced; the standardized structure design of the pressure block 2 facilitates mass production and management, and the frosted bottom design enhances the stability of the combination of the pressure block 2 and the antenna, avoiding the displacement of the antenna caused by the sliding of the pressure block 2 during the welding process.
[0052] In a possible embodiment, the antenna positioning groove 8 is a groove body penetrating through the cover plate 3, and the shape thereof is adapted to the shape of the antenna to be mounted.
[0053] The antenna positioning groove 8 is designed as a groove body penetrating through the upper and lower surfaces of the cover plate 3, the inner wall of the groove body is processed by CNC milling with a precision of ±0.02 mm, so as to ensure that the gap between the groove body and the shape of the antenna is controlled within 0.05 mm. At the same time, according to the pin distribution characteristics of the antenna, a chamfer of 0.5 mm is processed at the bottom edge of the antenna positioning groove 8, so as to avoid the pin being scratched by the edge of the groove body when the antenna is put in.
[0054] When mounting, the antenna with a pre-implanted ball is put into the antenna positioning groove 8 from the upper surface of the cover plate 3, since the groove body penetrates through, the bottom of the antenna can be directly in contact with the PCB board on the placement table 4, and the implanted ball on the antenna is accurately aligned with the pad on the PCB board; if it is found that the mounting gap between the antenna and the PCB board is too large, the gap can be adjusted by replacing the pressure block 2 with different thicknesses, so as to meet the welding requirements.
[0055] In the embodiment of the present application, the design of the through antenna positioning groove 8 solves the problem of antenna suspension and inaccurate alignment caused by traditional non-through groove. The through structure enables the antenna bottom to directly contact the PCB, ensuring accurate alignment of the ball on the antenna with the PCB pad, with a mounting deviation of less than ±0.03mm, meeting the requirements of high-frequency communication equipment for interconnection accuracy; the high-precision processing of the inner wall of the groove ensures the stability of the antenna positioning, and the bottom chamfer design protects the antenna pins from damage, reducing the component scrap rate; in addition, the through structure also facilitates heat conduction and gas discharge during welding, avoiding defects such as accumulation of hot gas or solder volatiles in the groove, improving the stability of welding quality, and adjusting the mounting gap with the pressing block 2 to further optimize the welding preparation accuracy.
[0056] In one possible embodiment, a semicircular identification port is provided on at least one side of the antenna positioning groove 8 for direction identification and tweezers gripping of the antenna.
[0057] In the center of each groove, a semicircular identification port with a diameter of 5mm and a depth of 15mm is processed. The edge of the semicircular identification port is polished to prevent scratching the tweezers or the antenna with sharp edges.
[0058] During the mounting operation, the operator can quickly determine the installation direction of the antenna by observing the position of the semicircular identification port, avoiding reverse installation of the antenna.
[0059] When the antenna position needs to be adjusted, the tip of the tweezers is inserted into the semicircular identification port, and the antenna can be easily gripped for fine adjustment without the need to pry the antenna, preventing deformation of the antenna or the ball from falling off.
[0060] In the embodiment of the present application, the identification port provides a clear visual identification for the antenna installation direction, completely solving the problem of antenna installation in the wrong direction caused by the lack of direction marking in traditional tooling, greatly reducing the mounting error rate and improving the mounting efficiency and accuracy; at the same time, the identification port serves as the operation space for the tweezers to grip, avoiding the operator from violently gripping the antenna due to the lack of a point of force, protecting the integrity of the antenna shape structure and the pre-implanted ball, reducing the component loss cost, and simplifying the antenna position adjustment process; in addition, the semicircular structure design is simple and has low processing difficulty, which will not affect the overall strength and positioning accuracy of the antenna positioning groove 8, improving the practicability while controlling the tooling processing cost.
[0061] In one possible embodiment, the boss 7 of the base 1 and the groove 9 of the cover plate 3 are clearance-fitted, and the fitting tolerance is configured to meet the predetermined mounting accuracy requirements.
[0062] The fitting clearance is controlled by precise tolerance design: The outer dimension of the boss 7 is set to 96mm x 96mm with a tolerance of ±0.1mm, and the inner dimension of the groove 9 is set to 45.5mm x 45.5mm with a tolerance of ±0.1mm, ensuring that the fitting clearance between the boss 7 and the groove 9 is controlled between 0.1-0.3mm.
[0063] In the assembly test, after the cover plate 3 is buckled on the base 1, the displacement deviation of the cover plate 3 relative to the base 1 is detected by the micrometer, and it is found that the displacement deviation in the X-axis and Y-axis directions is less than 0.2mm, which fully meets the requirements of the antenna and PCB mounting precision; at the same time, after repeated buckling and disassembly for 100 times, the fitting clearance between the boss 7 and the groove 9 has no obvious change, and the structural stability is good.
[0064] In the embodiment of the present application, the precise gap fit is the core to ensure the mounting precision of the tool. Strict tolerance control makes the relative displacement deviation between the base 1 and the cover plate 3 extremely small, which provides a stable structural basis for the precise mounting of the antenna and the PCB, avoids the mounting deviation caused by misplacement, and further improves the precision. Reasonable gap ensures the convenience of assembly, avoids interference fit that causes tool deformation or assembly difficulty, and prolongs the service life. And relying on the machining tolerance to control the precision, instead of experience positioning, makes the precision repeatability and stability good, meets the consistency of experimental data, and is also convenient for tool cleaning and maintenance.
[0065] In a possible embodiment, four antenna positioning grooves 8 are provided on the cover plate 3, and twelve pressing blocks 2 are matched.
[0066] The number of antenna positioning grooves 8 on the cover plate 3 is set to 4, which are arranged in a 2 x 2 array, and the spacing of each positioning groove is 25mm, which can simultaneously mount 4 groups of antennas and PCBs; the number of matched pressing blocks 2 is set to 12, including 4 light blocks 10, 4 medium blocks 11 and 4 heavy blocks 12.
[0067] In the experiment, the welding effect under 4 different pressure conditions needs to be tested at the same time, which are 10g, 30g, 40g and 50g.
[0068] The operator respectively places a 10g light block 10, a 30g medium block 11, a 10g light and a 30g medium block 11, and a 50g heavy block 12 in the four antenna positioning grooves 8, and simultaneously completes the assembly and welding of the four experimental samples.
[0069] The experimental results show that the mounting precision and welding quality of the four groups of samples meet the test requirements, and the experimental efficiency is improved by 4 times compared with the single slot tool.
[0070] In the embodiments of the present application, four positioning grooves and twelve pressing blocks 2 are configured to improve the performance of batch operation and experimental efficiency. The four positioning grooves realize synchronous mounting and welding of multiple groups of samples, adapt to multi-parameter comparison experiments and small-batch multi-specification production, greatly improve the efficiency, and shorten the research and production cycle. The twelve pressing blocks 2 are matched with the number of positioning grooves, meet the different pressure requirements of four groups of samples in a single batch, can be alternately used as backup, avoid interruption of work due to problems of the pressing blocks 2, and the compact structure of the tooling facilitates the placement into the vacuum eutectic furnace, does not occupy additional equipment space, and improves the practicability.
[0071] In a possible embodiment, a method for mounting and welding an antenna and a PCB board in an integrated tooling is provided, comprising the following steps: S1: Place the PCB board to be mounted on the precision silk screen table, print the solder with a stainless steel screen and a silica gel scraper, and control the thickness of the solder to be 0.12 mm.
[0072] After printing, the edge of the PCB board is lightly clamped with a ceramic tweezer, and placed on the placement table 4 of the base 1, ensuring that the PCB board is completely embedded in the PCB fixing groove 6, and the PCB board is checked by visual inspection to confirm that there is no deviation.
[0073] S2: Hold the edge of the cover plate 3, align the groove 9 at the bottom of the cover plate 3 with the boss 7 at the top of the base 1, and slowly lower the cover plate 3 until the boss 7 is completely embedded in the groove 9.
[0074] Gently shake the cover plate 3, if there is no obvious looseness, the assembly is completed; if there is looseness, adjust the position of the cover plate 3 to ensure that the boss 7 and the groove 9 are accurately matched; S3: Use an anti-static tweezer to clamp the pre-implanted ball antenna, confirm the installation direction through the semicircular identification port on the antenna positioning groove 8, and slowly place the antenna into the antenna positioning groove 8.
[0075] Observe the alignment of the implanted ball on the antenna and the pad on the PCB board through a microscope, if there is deviation, adjust the position of the antenna with the tweezer inserted into the identification port until the alignment deviation is less than 0.03 mm.
[0076] S4: According to the welding process requirements, select a 10g light block 10 and a 30g medium block 11, stack the two pressing blocks 2 at the center position of the antenna, and ensure that the pressing blocks 2 are completely located in the antenna positioning groove 8 without exceeding the groove body.
[0077] Detect the actual pressure through the pressure sensor, and confirm that the pressure value is 40±0.2g; S5: Place the assembled tooling in the center of the furnace table of the vacuum eutectic furnace, close the furnace door, and set the welding curve: Temperature rising stage: room temperature to 150℃, temperature rising rate 5℃ / min; Soak stage: 150℃ for 2min; Welding stage: 150℃ to 220℃, heating rate 3℃ / min, holding for 3min; Cooling stage: 220℃ to room temperature, cooling rate 4℃ / min; Start the furnace, after the welding curve is executed, take out the tooling, cool to room temperature, disassemble, complete the mounting and welding.
[0078] In the embodiment, the step design makes the operation have guidance and repeatability, reduces the threshold, ensures the operation quality of different personnel to be consistent, avoids the quality fluctuation caused by operation habits. The quality check of each step forms a closed loop, reduces the error before welding, and the welding yield is high. The standardized welding curve is matched with the tooling, the heat transfer and pressure control advantages of the tooling are played, the welding parameter is stable, and the cycle is shortened. And without expensive automatic equipment, manual operation can realize high-precision processing, and reduce the research and development and small-batch production equipment cost.
[0079] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments are modified, or part or all of the technical features are replaced, without making the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An antenna and PCB board mounting-welding integrated tool, characterized in that, The utility model relates to a kind of antenna mounting and welding device, including: Base (1), its top is equipped with the table (4) for supporting PCB board, the table (4) periphery is equipped with PCB fixed slot (6) for positioning PCB board, the top of the base (1) is further equipped with boss (7); Cover plate (3), it is equipped with recess (9) matched with the boss (7), at least one antenna positioning slot (8) for positioning antenna is opened in the cover plate (3); Press block (2), it can be placed in the antenna positioning slot (8), for exerting pressure on antenna when welding.
2. The antenna and PCB board SMT-welding integrated tooling according to claim 1, characterized in that, The table (4) of the base (1) is provided with a plurality of heat dissipation through holes (5) penetrating the bottom.
3. The antenna and PCB board SMT-welding integrated tooling according to claim 2, characterized in that, The number of the heat dissipation through holes (5) is multiple, and is distributed in an array.
4. The antenna and PCB board SMT-welding integrated tooling according to claim 1, characterized in that, The press block (2) has multiple different specifications, and different specifications of the press block (2) have different masses to realize quantized counterweight on antenna.
5. The antenna and PCB board SMT-welding integrated tooling according to claim 4, characterized in that, The specifications of the press block (2) include lightweight block (10), medium-weight block (11) and heavy-weight block (12) with different masses.
6. The antenna and PCB board SMT-welding integrated tooling according to claim 1, characterized in that, The antenna positioning slot (8) is a slot body penetrating the cover plate (3), and the shape thereof is adapted to the shape of the antenna to be mounted.
7. The antenna and PCB board SMT-welding integrated tooling according to claim 6, characterized in that, At least one side of the antenna positioning slot (8) is provided with a semicircular identification port for direction identification and tweezers clamping of the antenna.
8. The antenna and PCB board SMT-welding integrated tooling according to claim 1, characterized in that, The boss (7) of the base (1) and the recess (9) of the cover plate (3) are gap matched, and the matching tolerance is configured to meet the predetermined mounting accuracy requirement.
9. The antenna-PCB board SMT-welding integrated tooling according to any one of claims 1-8, characterized in that, The cover plate (3) is provided with four antenna positioning slots (8), and is matched with twelve press blocks (2).
10. A method of mounting and soldering an antenna to a PCB board using the tooling of any one of claims 1-9, characterized in that, The method comprises the following steps: S1: placing the PCB board on which solder printing has been completed on the table (4) of the base (1), and positioning through the PCB fixed slot (6); S2: buckling the cover plate (3) on the boss (7) of the base (1) through the recess (9) thereof; S3: sequentially placing the antenna into the antenna positioning slot (8) of the cover plate (3), so that the solder ball on the antenna is aligned with the pad on the PCB board; S4: according to the pressure required for welding, selecting appropriate press block (2) to be placed in the antenna positioning slot (8) on the top of the antenna; S5: placing the assembled whole into the welding equipment, executing welding process curve, and completing mounting and welding.