Universal integrated welding tool for microwave assembly

Abstract

The utility model discloses a universal integrated welding tool for microwave components, which comprises a bottom plate, a component shell arranged on the upper surface of the bottom plate, a cover plate arranged above the component shell, and the cover plate and the bottom plate are bolted and detachable; the front universal ejector rod assembly comprises a positive spring ejector rod, a polytetrafluoroethylene ejector block is fixed at the front end of the positive spring ejector rod, the rear end of the positive spring ejector rod is of a threaded structure, and the cover plate is provided with array threaded holes allowing the positive spring ejector rod to be selectively screwed in and fixed, so that the polytetrafluoroethylene ejector block is pressed on the circuit board; the side face universal ejector rod assembly comprises a side spring ejector rod, a polytetrafluoroethylene ejector block is fixed to the front end of the side spring ejector rod, the rear end of the side spring ejector rod is of a threaded structure, a side ejector rod fixing block is arranged on the bottom plate, and a threaded hole allowing the side spring ejector rod to be screwed in is formed in the side ejector rod fixing block, so that the polytetrafluoroethylene ejector block is pressed on the connector. Adjustment can be conducted according to the shapes of different microwave assemblies, the positions of the spring ejector rod and the fixing block are replaced, the screwing-in depth of the spring ejector rod is adjusted, and integrated welding of the different microwave assemblies can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical element technical field especially is related to a general integrated welding tool of microwave assembly. BACKGROUND

[0002] The microwave assembly is in great demand in the current market, and its production quality and production efficiency have an important influence on radar performance. In the highly competitive market environment, how to ensure the quality of qualified and stable production preparation under the premise of the highest efficiency is of great significance to electronic manufacturing enterprises.

[0003] At present, the microwave assembly structure is complex, and the frequency of the radio frequency circuit in the assembly is high. In order to ensure the quality of signal transmission in the assembly, the solder penetration rate of the circuit board is required to be high to ensure the continuity of grounding; the radio frequency module has large heat dissipation and uses bare chips, generally sets the temperature to the lowest gradient of solder, which is convenient for assembly and repair of other parts, but the reliability risk of the radio frequency module using low melting point solder is larger; in order to consider the performance, reliability and repairability of the assembly, the temperature gradient setting poses a great challenge. Without special tooling, the traditional welding method needs two or more temperature gradients for the circuit board and surface-mounted devices and other components, and the radio frequency module is set to a lower temperature to facilitate assembly and repair. Such temperature gradient design affects the reliability of the radio frequency module, and the process state is different from that of production with special tooling, which needs to be verified again, increasing the production cost; and the special tooling for the assembly increases the preparation period and cost of the assembly, and when the tooling is not suitable, the tooling needs to be modified or customized again, affecting the production progress. SUMMARY

[0004] The utility model discloses a general integrated welding tool of microwave assembly.

[0005] Technical scheme: the utility model discloses a general integrated welding tool of microwave assembly, and the microwave assembly includes an assembly shell, the circuit board is welded on the front of the assembly shell, and the connector is welded on the side of the assembly shell, and the welding tool includes:

[0006] A bottom plate, the assembly shell is placed on the upper surface of the bottom plate, a cover plate is arranged above the assembly shell, and the cover plate is detachably bolted with the bottom plate;

[0007] A general front top rod assembly includes a front spring top rod, a polytetrafluoroethylene top block is fixed at the front end of the front spring top rod, the rear end is a threaded structure, the cover plate is provided with an array of threaded holes for the front spring top rod to be screwed into and fixed, and the polytetrafluoroethylene top block is pressed on the circuit board;

[0008] The side universal ejector rod assembly comprises a side spring ejector rod, a polytetrafluoroethylene top block fixed at the front end of the side spring ejector rod, and a threaded structure at the rear end of the side spring ejector rod.

[0009] Further, the bottom plate is of a rectangular structure, the assembly shell is arranged at the center of the bottom plate, and the four corners of the bottom plate are provided with support columns, and the four corners of the cover plate are fixed by screwing the support columns at the top of the support columns.

[0010] Further, the bottom plate is provided with a plurality of annular bosses arranged outward from the center, the bottom part of the side ejector rod fixing block is provided with a groove structure, the groove structure can move on the annular bosses according to the position of the connector, and the groove structure can select the annular bosses at different layers.

[0011] Further, the bottom plate is provided with a plurality of annular bosses arranged outward from the center, the bottom part of the side ejector rod fixing block is provided with a groove structure, the groove structure can move on the annular bosses according to the position of the connector, and the groove structure can select the annular bosses at different layers.

[0012] Further, the bottom plate is provided with a plurality of annular bosses arranged outward from the center, the bottom part of the side ejector rod fixing block is provided with a groove structure, the groove structure can move on the annular bosses according to the position of the connector, and the groove structure can select the annular bosses at different layers.

[0013] Further, one end of the polytetrafluoroethylene top block is threadedly connected with the front end of the spring ejector rod, and the other end of the polytetrafluoroethylene top block is provided with a circular hole corresponding to the pin structure of the connector.

[0014] Further, the polytetrafluoroethylene top block and the front end of the spring ejector rod are connected through a transition inclined rod, the connection parts are all threadedly connected, the position of the polytetrafluoroethylene top block is adjusted through the transition inclined rod, and the compression force is transmitted.

[0015] Advantages: compared with the prior art, the advantages of the utility model are that: according to the shape of different microwave assemblies, the position of the spring ejector rod and the fixing block can be adjusted, the depth of the spring ejector rod can be adjusted, the integrated welding of different microwave assemblies can be realized, and the utility model has high universality; meanwhile, the circuit board, the surface-mounted device and the connector are welded, the setting of the assembly temperature gradient is reduced, the production efficiency is improved, and the assembly quality is guaranteed; the design and manufacturing of special tooling are reduced, and the production cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is an overall assembly structure diagram of the utility model;

[0017] Fig. 2 It is a structure diagram of the utility model without the cover plate. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be further described below in combination with the drawings and embodiments.

[0019] As Figs. 1-2 shown, a universal integrated soldering tool for microwave assembly, the microwave assembly includes an assembly shell 1, the assembly shell 1 is welded with a circuit board 2 in front, and a connector 3 is welded on the side, the contact surface between the circuit board 2 and the assembly shell 1 is a copper layer, and a solder sheet is placed between the circuit board 2 and the assembly shell 1; the solder paste is printed on the electronic device pad position of the front surface of the circuit board, and various electronic components are attached; the assembly shell 1 and the connector 3 are welded, the shell is provided with a hole position for brazing and mounting the connector, the corresponding connector is mounted on the hole, and the solder paste is spot applied or the solder ring is used to provide the solder required during welding.

[0020] The soldering tool includes:

[0021] A bottom plate 4, the assembly shell 1 is placed on the upper surface of the bottom plate 4, a cover plate 5 is arranged above the assembly shell 1, the cover plate 5 is bolted with the bottom plate 4 and can be detached; the bottom plate 4 is of a rectangular structure, the assembly shell 1 is placed in the center of the bottom plate 4, the bottom plate 4 is provided with a support 10 at each corner, and the cover plate 5 is fixed by screwing into the top of the support 10 at each corner.

[0022] A universal front ejection rod assembly includes a front spring ejection rod 6, the front end of the front spring ejection rod 6 is fixed with a polytetrafluoroethylene ejection block 7, and the rear end is of a threaded structure, the cover plate 5 is provided with an array of threaded holes for the front spring ejection rod 6 to be screwed into and fixed, so that the polytetrafluoroethylene ejection block 7 is pressed against the circuit board 2.

[0023] A universal side ejection rod assembly includes a side spring ejection rod 8, the front end of the side spring ejection rod 8 is fixed with a polytetrafluoroethylene ejection block 7, and the rear end is of a threaded structure, the bottom plate 4 is provided with a side ejection rod fixing block 9, the side ejection rod fixing block 9 is provided with a threaded hole for the side spring ejection rod 8 to be screwed into, so that the polytetrafluoroethylene ejection block 7 is pressed against the connector 3.

[0024] The front spring ejection rod 6 and the side spring ejection rod 8 are consistent in structure, which are ejection rods, threaded sleeves, ejection rods, springs and retaining rings, the threaded sleeve is used to fix the spring ejection rod with the external screw hole, the spring provides elastic force to the ejection rod, the retaining ring is clamped at the tail of the ejection rod to prevent the ejection rod from being separated from the threaded sleeve, and the ejection rod has a threaded hole concentric with the ejection rod at the top, so that the polytetrafluoroethylene ejection block can be fixed to the top end of the ejection rod through the thread.

[0025] The bottom plate 4 is provided with multiple annular bosses 11 outwardly and spaced from the center, the side ejection rod fixing block 9 is provided with a groove structure at the bottom, which can move on the annular boss 11 according to the position of the connector 3 and select the annular boss 11 at different layers.

[0026] The bottom plate 4 is provided with a fixed screw hole 12 corresponding to the position of both ends of each layer of annular bosses 11, and the side top rod fixing block 9 is adjusted to the position and then pressed down by the fixed pressing strip 13, and the fixed pressing strip 13 is fixed at both ends by the fixed screw rod 14 and the fixed screw hole 12.

[0027] The bottom plate 4 is provided with a heat dissipation through hole in the groove between each layer of annular bosses 11.

[0028] One end of the polytetrafluoroethylene top block 7 is threadedly connected with the front end of the spring top rod, and the other end is provided with a circular hole corresponding to the pin structure of the connector 3 to protect the pin structure of the connector 3 from being bent. The front end of the polytetrafluoroethylene top block 7 is connected with the front end of the spring top rod through a transition inclined rod 15, and the connection part is threadedly connected. The polytetrafluoroethylene top block 7 is adjusted to the pressing position by the transition inclined rod 15, and the pressing force is transmitted.

[0029] The assembly of the microwave assembly is carried out, and the pre-set soldering tin solder is of a uniform temperature gradient. Due to the requirements for microwave radio frequency performance and assembly airtightness, the circuit board and the side connector are assembled by welding. An appropriate amount of solder sheet or solder paste is placed in the microwave assembly shell, the circuit board 2 is placed in the appropriate position in the assembly shell 1, solder paste is applied on the solder pad of the circuit board, the surface-mounted device is placed on the corresponding solder pad position, and the connector 3 is applied with solder paste or assembled with a solder ring, and then the connector 3 is installed at the corresponding position of the shell.

[0030] In the actual welding process, the circuit board 2 may be warped due to flatness problems, resulting in unqualified cavity rate and affecting the radio frequency performance of the assembly. The connector 3 is prone to deviation at the welding position due to the gasification of the solder flux caused by heat, so it is necessary to apply pressure and limit by the tool to ensure that the welding position and reliability meet the requirements.

[0031] According to whether the transition inclined rod 15 is selected according to different connectors 3, the elastic force deviating from the spring top rod but in the same direction can be provided. When the side connector is welded, the height can be adjusted by rotating the transition inclined rod 15 to adapt to different microwave assembly shells.

[0032] The microwave assembly is placed on the bottom plate 4 for general tool assembly. The side spring top rod 8 provided with the polytetrafluoroethylene top block 7 is screwed into the side top rod fixing block 9, and the screwing depth is adjusted to ensure that the polytetrafluoroethylene top block 7 can contact and provide pressure to the connector 3 after the fixing block bottom groove and the annular boss 11 are matched and assembled. The position of the side top rod fixing block 9 is adjusted so that the polytetrafluoroethylene top block 7 can provide pressure to the connector. The fixed pressing strip 13 is pressed on the side top rod fixing block 9, and the both ends are screwed to ensure that the position of the fixing block does not move.

[0033] Install the support 10 on the base plate 4, place the cover plate 5 in the expected installation position, and observe from top to bottom. Through the array of threaded holes on the cover plate 5, find the installation position of the positive spring push rod 6. Select the area on the circuit board 2 where no surface-mount devices are installed. After determining the installable area, observe whether the pressure area of ​​the circuit board 2 is uniform. If some areas without surface-mount devices are not subjected to downward pressure, the spring push rod can be installed from the nearby threaded hole using the transition diagonal rod 15 to apply pressure.

[0034] After the positive spring push rod 6 is installed into the predetermined threaded hole on the cover plate 5, a suitable polytetrafluoroethylene push block 7 is screwed into the top. The cover plate is then installed onto the top of the support column 10 using screws. The screwing depth of the positive spring push rod 6 is adjusted, and the downward pressure on the circuit board 2 is adjusted to a suitable value to complete the installation of the tooling.

[0035] After assembly, the tooling is placed in a vacuum gas phase furnace for welding. After welding, the screws are loosened and the microwave components are removed. After inspection and cleaning, the components are then assembled.

[0036] This welding fixture provides effective limiting and pressure, enabling integrated welding of circuit boards, surface-mount devices, connectors, and microwave component housings while avoiding surface-mount components. Using an advanced vacuum phase-phase furnace effectively reduces the solder penetration rate of the circuit board, ensuring weld quality. This integrated fixture is flexibly adaptable to microwave components of various sizes and structures, effectively reducing the cost and time of preparing dedicated fixtures for components. The integrated welding process allows for a larger temperature gradient for the solder in subsequent component welding steps, reducing assembly process complexity and effectively improving production efficiency.

Claims

1. A universal integrated welding fixture for microwave components, the microwave component including a component housing (1), wherein a circuit board (2) is welded to the front side of the component housing (1) and a connector (3) is welded to the side side, characterized in that, The welding fixture includes: The base plate (4) is provided with the component housing (1) on the upper surface of the base plate (4), and the cover plate (5) is provided above the component housing (1). The cover plate (5) is bolted to the base plate (4) and is detachable. The front universal push rod assembly includes a positive spring push rod (6), the front end of which is fixed with a polytetrafluoroethylene push block (7), and the rear end is a threaded structure. The cover plate (5) has an array of threaded holes for the positive spring push rod (6) to be screwed in and fixed, so that the polytetrafluoroethylene push block (7) is pressed against the circuit board (2). The side universal push rod assembly includes a side spring push rod (8), the front end of which is fixed with a polytetrafluoroethylene push block (7), and the rear end is a threaded structure. The base plate (4) is provided with a side push rod fixing block (9), and the side push rod fixing block (9) has a threaded hole for the side spring push rod (8) to be screwed in, so that the polytetrafluoroethylene push block (7) is pressed against the connector (3).

2. The universal integrated welding fixture for microwave components according to claim 1, characterized in that: The base plate (4) is a rectangular structure. The component housing (1) is placed in the center of the base plate (4). The base plate (4) has support columns (10) at its four corners. The cover plate (5) is fixed by screws screwed into the top of the support columns (10) at its four corners.

3. The universal integrated welding fixture for microwave components according to claim 1, characterized in that: The base plate (4) is provided with multiple annular bosses (11) spaced out from the center. The bottom of the side top rod fixing block (9) is provided with a groove structure, which can move on the annular bosses (11) according to the position of the connector (3) and select the annular bosses (11) in different layers.

4. The universal integrated welding fixture for microwave components according to claim 3, characterized in that: The base plate (4) is provided with fixing screw holes (12) at both ends of each layer of annular boss (11). After the side top rod fixing block (9) is adjusted to the correct position, it is pressed down by fixing pressure strip (13). The two ends of the fixing pressure strip (13) are fixed to the fixing screw holes (12) by fixing screws (14).

5. The universal integrated welding fixture for microwave components according to claim 3, characterized in that: The base plate (4) has heat dissipation holes spaced apart in the grooves between each layer of annular bosses (11).

6. The universal integrated welding fixture for microwave components according to claim 1, characterized in that: One end of the polytetrafluoroethylene top block (7) is threaded to the front end of the spring top rod, and the other end has a round hole corresponding to the pin structure of the connector (3).

7. The universal integrated welding fixture for microwave components according to claim 1, characterized in that: The polytetrafluoroethylene top block (7) is connected to the front end of the spring top rod through a transition inclined rod (15). The connection part is threaded. The pressing position of the polytetrafluoroethylene top block (7) is adjusted by the transition inclined rod (15) and the pressing force is transmitted.

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