Positioning fixture for nested radiation unit and welding method for nested radiation unit

Abstract

The present invention provides a positioning tool for a nested radiation unit and a welding method for the nested radiation unit, wherein the positioning tool for the nested radiation unit includes a base, a support column and a pressure block, the support column is vertically installed on the base, the height of the support column is adapted to the height of the nested radiation unit to be processed, and the pressure block is located on the top of the support column and is used to tightly restrict the nested radiation unit in a positioning space defined by the base, the support column and the pressure plate. The present invention uses a pressure block to pre-fix the nested radiation unit on the base to meet the fit requirements of the nested radiation unit and the joint plate, ensure the electrical performance between the radiation unit and the joint plate, and at the same time cooperate with reflow soldering to weld all solder joints between the radiation unit and the joint plate. The welding method is simple and effective, all solder joints are completed at one time, and the complicated welding process is simplified, the labor intensity is reduced, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a positioning fixture for a nested radiation unit and a welding method for the nested radiation unit. Background Art

[0002] With the development of 5G in the communications industry, the use of radiating units tends to be miniaturized, so nested combined radiating units are often used. However, due to the complex structure of existing nested radiating units, many small materials, and small operating space, it is impossible to ensure the fit between the embedded radiating units and the circuit board. In addition, the production steps are complicated, the labor cost is high, and the worker efficiency is low, resulting in low production capacity. Summary of the invention

[0003] The main purpose of the present invention is to provide a positioning fixture for nested radiating units for pre-fixing the nested radiating units and a coupling plate.

[0004] Another object of the present invention is to provide a method for welding nested radiating units using the above-mentioned positioning fixture for nested radiating units.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] As a first aspect, the present invention relates to a positioning tool for a nested radiation unit, comprising a base, a support column and a pressure block, wherein the support column is vertically installed on the base, the height of the support column is adapted to the height of the nested radiation unit to be processed, and the pressure block is located on the top of the support column and is used to tightly confine the nested radiation unit to a positioning space defined by the base, the support column and the pressure plate.

[0007] It is further configured that the pressing block includes a first pressing block and a second pressing block, the first pressing block is used to press the external low-frequency vibrator of the nested radiation unit, and the second pressing block is located in the middle of the first pressing block and can be moved along the length direction of the support column to press the internal high-frequency vibrator of the nested radiation unit into the external low-frequency vibrator.

[0008] It is further configured that: an adjustment rod extending along the length direction of the support column is provided on the second pressing block, and the adjustment rod passes through the first pressing block and is threadedly connected to the first pressing block.

[0009] It is further configured that: the first pressing block includes two pressing rods that cross to form a cross-shaped structure, and the ends of the pressing rods are connected to the tops of the supporting columns.

[0010] It is further configured that: the base is provided with a socket for inserting the bottom of the support column.

[0011] It is further configured that the bottom of the support column is attracted to the base through a magnet.

[0012] It is further configured that: a plurality of weight-reducing holes are provided on the support column and the pressing block.

[0013] As a second aspect, the present invention relates to a method for welding a nested radiation unit, comprising the following steps: installing a cable into a wire trough of an external low-frequency vibrator to be welded, and spot tinning the external low-frequency vibrator;

[0014] Apply solder paste to the preset holes on the back of the circuit board to be soldered, and then install the circuit board with the back side facing down into the positioning fixture for the nested radiation unit;

[0015] Assemble the external low-frequency vibrator carrying the cable to the front of the circuit board, and fit the vibrator foot of the external low-frequency vibrator to the hole reserved by the positioning tooling of the nested radiation unit, then embed the internal high-frequency vibrator into the external low-frequency vibrator, and at the same time, insert the vibrator foot of the internal high-frequency vibrator into the preset vibrator hole of the circuit board;

[0016] The external low-frequency oscillator and the internal high-frequency oscillator are pre-fixed to the combining plate respectively by using the positioning fixture of the nested radiation unit, and the internal high-frequency oscillator is closely fitted to the combining plate;

[0017] The nested radiating units and the nested radiating units that have been assembled with each other are reflowed using a positioning tool.

[0018] Further configuration: before the cable is installed in the cable duct of the low-frequency vibrator, the cable is pre-bent using a three-dimensional bending tool.

[0019] Further setting: After the cable is installed in the cable duct of the low-frequency vibrator, it is clamped with a cable clamp and the cable and the low-frequency vibrator are fixed by tinning.

[0020] It is further configured that the positioning tooling for the nested radiation unit includes a base, a support column and a pressing block, wherein the coupling plate is installed into a preset accommodating groove of the base, and the external low-frequency vibrator and the internal high-frequency vibrator are respectively pressed by the pressing block to pre-fix them with the coupling plate.

[0021] Compared with the prior art, the solution of the present invention has the following advantages:

[0022] 1. In the positioning tool for the nested radiation unit of the present invention, a pressing block is used to pre-fix the nested radiation unit on the base to meet the fit requirement of the nested radiation unit and the circuit board, thereby ensuring the electrical performance between the radiation unit and the circuit board, and at the same time ensuring the structural stability of the nested radiation unit and the circuit board during the welding process, thereby improving the welding quality, and at the same time cooperating with the reflow soldering to weld all the solder joints between the radiation unit and the circuit board. The welding method is simple and effective, all the solder joints are completed at one time, which simplifies the complicated welding process, reduces labor intensity, reduces labor costs, and has high production efficiency.

[0023] 2. In the positioning fixture for nested radiation units of the present invention, the support column is fixed to the base and the pressing block by magnets, so that the positioning fixture for nested radiation units has high structural stability and is easy to assemble and disassemble, which is convenient for workers to operate.

[0024] 3. In the welding method of the nested radiation unit of the present invention, the nested radiation unit positioning tool is used in conjunction with the reflow soldering process to realize the welding of the nested radiation unit and other electrical components to the circuit board, and all solder joints are welded at one time, and the radiation unit to be welded and the circuit board are pre-fixed by the nested radiation unit positioning tool to meet the fit requirement between the radiation unit and the circuit board. At the same time, the circuit board adopts the welding process of brushing tin on the back and filtering and penetrating tin, so that the solder joints of the finished product are full, the electrical performance of the circuit part is good, the structure of the mechanical connection part is stable, the welding method is simple and effective, and assembly line operation is realized, the production efficiency is high, the finished product quality is good, and the output rate is high.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of an embodiment of a positioning tool for nested radiation units of the present invention;

[0028] Figure 2 A split diagram of an embodiment of a positioning tool for nested radiation units of the present invention.

[0029] In the figure, 1. base; 11. socket; 2. support column; 3. pressure block; 31. first pressure block; 32. second pressure block; 33. adjustment rod; 34. third pressure block; 4. weight reduction hole; 100. positioning tool for nested radiation units; 200. circuit board; 300. external low-frequency vibrator; 400. internal low-frequency vibrator; 500. other electrical components; 600. cable. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0031] See also Figure 1 and Figure 2 The present invention relates to a positioning tool 100 for a nested radiation unit, which mainly provides pre-fixation for welding the nested radiation unit and the circuit board 200, solving the problem that the existing nested radiation unit welding steps are complicated and require multiple manual welding. At the same time, combined with reflow soldering, it can meet the assembly line requirements of the nested radiation unit, with high production efficiency and simple and effective welding.

[0032] Please combine Figure 1 The positioning tool 100 for the nested radiation unit includes a base 1, a support column 2 and a pressing block 3, wherein the support column 2 is vertically installed on the base 1, and the pressing block 3 is arranged on the top of the support column 2. The support column 2 is provided with at least two, and the arrangement of the support columns 2 on the base 1 is set to be arranged along the circumference of the nested radiation unit to be processed, so as to play an auxiliary positioning role for the nested radiation unit to be processed. At the same time, the height of the support column 2 is adapted to the height of the nested radiation unit to be processed, so that the pressing block 3 can be against the top surface of the nested radiation unit to be processed, thereby pressing and restricting the nested radiation unit to be tightly positioned in the positioning space defined by the base 1, the support column 2 and the pressing block 3.

[0033] Further, please combine Figure 2 The pressing block 3 includes a first pressing block 31 and a second pressing block 32. The first pressing block 31 is used to press the external low-frequency oscillator 300 of the nested radiation unit, and the second pressing block 32 is used to press the internal high-frequency oscillator of the nested radiation unit.

[0034] Specifically, the first pressing block 31 includes two pressing rods (not shown in the figure, the same below) that cross to form a cross-shaped structure, and the top of the support column 2 is connected to the end of the pressing rod, so that the four groups of radiation arms of the external low-frequency vibrator 300 are respectively pressed against the pressing rods forming the cross-shaped structure to press the external low-frequency vibrator 300 against the base 1; the second pressing block 32 is located in the middle of the first pressing block 31 and can be moved along the length direction of the support column 2, so that the internal low-frequency vibrator 400 can be pressed against the base 1 by adjusting the position of the second pressing block 32, thereby achieving pre-fixation of the nested radiating unit to ensure the welding quality of the nested radiating unit.

[0035] Preferably, the second pressing block 32 is provided with an adjustment rod 33 extending along the length direction of the support column 2, and the adjustment rod 33 passes through the middle of the first pressing block 31, specifically, the intersection of the two pressing rods. In addition, it should be understood that if the nested connection part of the internal high-frequency vibrator and the external low-frequency vibrator is not at the center of the external low-frequency vibrator, the position of the second pressing block 32 can be adaptively adjusted.

[0036] As a further preferred embodiment, the adjusting rod 33 is a screw rod, and the adjusting rod 33 is threadedly connected to the first pressing block 31, so that the second pressing block 32 can be driven by rotating the adjusting rod 33. The end of the adjusting rod 33 away from the second pressing block 32 is also provided with an adjusting slot (not shown in the figure, the same below) or a knob (not shown in the figure, the same below), wherein a worker can rotate the adjusting rod 33 by using a screwdriver to match the adjusting slot, or by using a knob to rotate the adjusting rod 33, which is convenient for the worker to operate.

[0037] Preferably, three support columns 2 are provided in this embodiment, and the tops of the three support columns 2 are respectively connected to three ends of the first pressing block 31, and the support columns 2 and the first pressing block 31 are attracted by magnets, which improves the connection stability between the support columns 2 and the first pressing block 31, facilitates assembly, and is conducive to improving work efficiency.

[0038] In another embodiment, two support columns 2 may be provided, and the two support columns 2 are symmetrically arranged at both ends of the same pressure rod of the first pressure block 31. Since the first pressure block 31 is an integrated structure, stable support for the first pressure block 31 can also be achieved through the two symmetrically arranged support columns 2.

[0039] The support column 2 is plug-fitted to the base 1 , and a socket 11 for inserting the support column 2 is provided on the base 1 corresponding to each support column 2 , and the distance between the sockets 11 is greater than the projection size of the nested radiation unit to the base 1 .

[0040] Furthermore, the bottom of the support column 2 is fixed to the base 1 by magnets (not shown in the figure, the same below) to improve the stability of the connection between the support column 2 and the base 1, thereby ensuring the pre-fixing strength of the nested radiation unit.

[0041] In addition, as another preferred embodiment, the pressing block 3 also includes a third pressing block 34. Since other electrical components 500 may be welded on the circuit board 200, for example, a high-frequency vibrator may be independently assembled on the circuit board 200, the third pressing block 34 may be used to press the independent high-frequency vibrator and make the independent high-frequency vibrator fit tightly with the circuit board 200. And since the structure of the independent high-frequency vibrator is relatively compact, the third pressing block 34 uses a pressing rod with a length greater than the width of the independent high-frequency vibrator to meet the pressing requirement of the width of the independent high-frequency vibrator. At the same time, the two ends of the pressing rod are respectively connected to the support column 2, and the height of the support column 2 is adapted to the height of the independent high-frequency vibrator, so that the third pressing block 34 presses the independent high-frequency vibrator on the base 1, thereby realizing the pre-fixation of the independent high-frequency vibrator and the circuit board 200.

[0042] Preferably, a plurality of weight-reducing holes 4 are provided on the support column 2 and the pressing block 3, thereby reducing the weight of the positioning tool 100 for the nested radiation unit, facilitating transportation and reducing transportation costs. In addition, workers can also observe the pressing condition of the pressing block on the nested radiation unit or other electrical components 500 through the weight-reducing holes 4 and make adjustments in time.

[0043] The positioning fixture 100 for nested radiation units of the present invention pre-fixes the nested radiation units or independent radiation units by pressing them, thereby meeting the requirements for the fit between the radiation units to be welded and the circuit board 200, thereby ensuring the welding quality. At the same time, all solder joints between the radiation units and the circuit board 200 are welded in conjunction with reflow soldering. The welding method is simple and effective, all solder joints are completed at one time, and the complicated welding process is simplified. There is no need for manual welding, which reduces labor intensity, reduces labor costs, and has high production efficiency.

[0044] In addition, the support column 2 of the positioning fixture 100 for nested radiation units of the present invention is fixed to the base 1 and the pressing block 3 by magnet attraction, so that the positioning fixture 100 for nested radiation units has high structural stability and is easy to assemble and disassemble, which is convenient for workers to operate.

[0045] The present invention also relates to a method for welding nested radiation units using the above-mentioned positioning tool 100 for nested radiation units. Figure 1 and Figure 2 , specifically including the following steps:

[0046] First, materials to be welded are prepared, including the external low-frequency vibrator 300 , the internal high-frequency vibrator, the cable 600 , the circuit board 200 , solder paste, other electrical components 500 , and the like.

[0047] The cable 600 is installed in the wire groove of the external low-frequency vibrator 300, and the external low-frequency vibrator 300 is tinned. It should be noted that after the cable 600 is inserted into the wire groove of the external low-frequency vibrator 300, it is necessary to ensure that the medium of the cable 600 fits the wire groove of the vibrator, and clamp it with a cable clamp (not shown in the figure, the same below), and then tin the cable 600 and the external low-frequency vibrator 300.

[0048] Furthermore, before the cable 600 is installed in the cable trough of the external low-frequency vibrator 300 , it can be pre-bent using a three-dimensional bending tool so that the bending degree of the cable 600 matches the bending degree of the cable trough of the external low-frequency vibrator 300 , thereby reducing the difficulty of assembling the cable 600 .

[0049] In addition, solder paste needs to be applied to the preset holes on the back of the joint plate 200 to be soldered with the radiation unit. When applying solder paste to the joint plate 200, the back of the joint plate 200 can be facing upwards to facilitate workers' operation.

[0050] After the materials are fully prepared, the circuit board 200 with solder paste on the back is installed into the positioning fixture 100 for the nested radiation unit with the back side facing downward. Specifically, the positioning fixture 100 for the nested radiation unit is the positioning fixture 100 for the nested radiation unit mentioned above, which includes a base 1, a support column 2 and a pressing block 3. The base 1 is provided with a receiving groove for receiving the circuit board 200, and the back side of the circuit board 200 is placed toward the base 1.

[0051] Secondly, assemble the tinned external low-frequency vibrator 300 onto the base 1 and place it on the front of the circuit board 200. The vibrator feet of the external low-frequency vibrator 300 need to fit into the preset holes on the base 1 to ensure that the external low-frequency vibrator 300 is assembled correctly.

[0052] Then, the internal high-frequency vibrator is nested into the center of the external low-frequency vibrator 300 , and the vibrator feet of the internal high-frequency vibrator need to be inserted into the vibrator holes preset in the circuit board 200 .

[0053] Subsequently, the positioning fixture 100 for the nested radiation unit is used to press and pre-fix the external low-frequency vibrator 300 and the internal high-frequency vibrator on the joint plate 200. Three support columns 2 are installed around the external low-frequency vibrator 300 according to its size, and the lengths of the three support columns 2 are adapted to the height of the external low-frequency vibrator 300. Subsequently, a first pressing block 31 with a cross-shaped structure equipped with a second pressing block 32 is installed on the top of the support column 2, and the three ends of the first pressing block 31 correspond to the three support columns 2 one by one, so that the external low-frequency vibrator 300 is pressed on the base 1. Then, by rotating the adjustment rod 33 connected to the second pressing block 32, the second pressing block 32 can be moved along the length direction of the support column 2 to press the internal high-frequency vibrator on the joint plate 200, thereby ensuring the fit between the nested radiation unit and the joint plate 200.

[0054] When the internal high-frequency oscillator is pressed against the coupling plate 200 , the internal high-frequency oscillator presses the coupling plate 200 against the base 1 , thereby ensuring the stability between the nested radiation unit and the coupling plate 200 during the welding process.

[0055] It should also be noted that the closing plate 200 extends from the openings of the three support columns 2. Specifically, the three support columns 2 are respectively connected to three ends of the first pressing block 31 of the cross-shaped structure, and the closing plate 200 extends from the end of the first pressing block 31 that is not connected to the support column 2 to avoid conflict between the positions of the closing plate 200 and the support column 2.

[0056] In addition, other electrical components 500 (such as independent high-frequency oscillators) can be pressed and fixed on the circuit board 200 by using the support column 2 and the third pressing block 34. In this embodiment, a group of nested radiation units and an independent high-frequency oscillator are assembled on a circuit board 200, and the oscillator feet of the independent high-frequency oscillator also need to be inserted into the preset oscillator holes of the circuit board 200.

[0057] After checking the coordination between the radiation unit, the circuit board 200 and the positioning fixture 100 for the nested radiation unit, the assembled radiation unit, the circuit board 200 and the positioning fixture 100 for the nested radiation unit are put into the reflow oven for reflow. Reflow is to put the components to be processed together with the circuit board into the reflow oven, heat the air or nitrogen to a sufficiently high temperature and blow it to the circuit board with the components attached, so that the solder on both sides of the components melts and then bonds with the circuit board. Since the reflow oven uses hot air reflow and convection conduction, the temperature is uniform, the welding quality is good, and it is suitable for mass production and has high production efficiency.

[0058] In addition, the circuit board 200 is tinned on the back side. During the reflow soldering process, since the gap between the vibrator foot and the vibrator hole preset in the circuit board 200 is small, the solder paste can easily penetrate into the gap between the vibrator foot and the vibrator hole preset in the circuit board 200 due to surface tension after melting, so that the solder joints can be full, the electrical performance of the circuit part is good, and the structure of the mechanical connection part is stable.

[0059] After the final welding is completed, the finished product and the nested radiation unit positioning fixture 100 are taken out of the reflow oven, the nested radiation unit positioning fixture 100 is disassembled to obtain the finished product, and the finished product is subjected to QC inspection, such as the inspection of defective solder joints, which mainly judges the quality of the solder joint by observing the appearance and remainder of the solder paste on the back of the circuit board 200, and the inspection is convenient.

[0060] The welding method of the nested radiation unit of the present invention utilizes the nested radiation unit positioning fixture 100 in conjunction with the reflow soldering process to realize the welding of the nested radiation unit and other electrical components 500 with the circuit board 200, and all solder joints are welded at one time. In addition, the radiation unit to be welded and the circuit board 200 are pre-fixed by the nested radiation unit positioning fixture 100 to meet the fitting requirement between the radiation unit and the circuit board 200. The welding method is simple and effective, and streamlined operation is realized, with high production efficiency and high yield.

[0061] At the same time, the circuit board 200 adopts a welding process of brushing tin on the back and filtering and penetrating tin, so that the solder joints of the finished product are full, the electrical performance of the circuit part is good, the structure of the mechanical connection part is stable, and the quality of the finished product is good.

[0062] The above descriptions are only some embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A positioning tool for nested radiation units, characterized in that: It includes a base, a support column and a pressing block, the base is provided with a socket for inserting the bottom of the support column, the support column is vertically installed on the base, the height of the support column is adapted to the height of the nested radiating unit to be processed, the pressing block is located at the top of the support column and is used to tightly limit the nested radiating unit in a positioning space defined by the base, the support column and the pressing plate, the pressing block includes a first pressing block and a second pressing block, the first pressing block is used to press the external low-frequency vibrator of the nested radiating unit, the first pressing block includes two pressing rods that cross to form a cross-shaped structure, the end of the pressing rod is connected to the top of the support column, the second pressing block is located in the middle of the first pressing block and can be moved along the length direction of the support column to press the internal high-frequency vibrator of the nested radiating unit into the external low-frequency vibrator, the second pressing block is provided with an adjusting rod extending along the length direction of the support column, the adjusting rod passes through the first pressing block and is threadedly connected to the first pressing block.

2. The positioning tool for nested radiation units according to claim 1, characterized in that: The bottom of the support column is attracted to the base through a magnet.

3. The positioning tool for nested radiation units according to claim 1, characterized in that: A plurality of weight-reducing holes are provided on the support column and the pressing block.

4. A method for welding nested radiation units, using the positioning tool for nested radiation units according to any one of claims 1 to 3, characterized in that: The following steps are involved: Install the cable into the wire duct of the external low-frequency vibrator to be soldered, and tin the external low-frequency vibrator; Apply solder paste to the preset holes on the back of the joint board to be welded, and then install the joint board with its back facing downward into the positioning fixture for the nested radiation unit; Assemble the external low-frequency vibrator carrying the cable to the front of the circuit board, and fit the vibrator foot of the external low-frequency vibrator to the hole reserved by the positioning tooling of the nested radiation unit, then embed the internal high-frequency vibrator into the external low-frequency vibrator, and at the same time, insert the vibrator foot of the internal high-frequency vibrator into the preset vibrator hole of the circuit board; The external low-frequency oscillator and the internal high-frequency oscillator are pre-fixed to the combining plate respectively by using the positioning fixture of the nested radiation unit, and the internal high-frequency oscillator is closely fitted to the combining plate; The nested radiating units and the nested radiating units that have been assembled with each other are reflowed using a positioning tool.

5. The welding method of nested radiation units according to claim 4, characterized in that: Before the cable is installed in the cable duct of the low-frequency vibrator, the cable is pre-bent using a three-dimensional bending tool.

6. The welding method of nested radiation units according to claim 4, characterized in that: After the cable is installed in the cable duct of the low-frequency vibrator, it is clamped with a cable clamp and the cable and the low-frequency vibrator are fixed with tin.

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