Positioning tool for integrated welding of microwave assembly

Abstract

The utility model relates to a positioning tool used for integrated welding of a microwave assembly, the microwave assembly comprises a shell, a substrate and a connector, the shell is provided with a substrate installation position and a connector installation position, the positioning tool comprises a base, a positioning block and a positioning block, and the base is provided with a placing cavity used for placing the shell; the base is provided with a locking mechanism used for fixing the shell to the containing cavity. The pressing block assembly is used for applying pressure to the substrate placed at the substrate mounting position, so that the substrate is kept at the substrate mounting position in the welding process; and the elastic limiting assembly is arranged on the base and is used for elastically applying pressure to the connector placed at the connector mounting position, so that the connector is kept at the connector mounting position in the welding process. According to the application, the microwave assembly can be integrally welded, so that the welding efficiency can be improved; and the device to be welded can be prevented from shifting in the welding process, so that the welding quality can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component assembly technical field, in particular to the positioning tool for microwave assembly integrated welding. BACKGROUND

[0002] With the internal device integration of microwave assembly higher and higher and constantly towards miniaturization, low cost development, the assembly difficulty of microwave assembly also increases day by day. The assembly between multiple substrates, multiple connectors and housings adopts the welding mode superior to the conductive adhesive bonding mode, and the welding reliability is higher. But the welding of microwave assembly usually involves substrate large-area welding, circulator welding, connector welding and other welding operations, and if the position offset occurs between various devices during welding operation, the welding effect will be affected. SUMMARY

[0003] Therefore, it is necessary to provide a positioning tool for microwave assembly integrated welding to solve the problem of easy position offset of components during the integrated welding of microwave assembly in the prior art.

[0004] The positioning tool for microwave assembly integrated welding, the microwave assembly includes a housing, a substrate and a connector, the housing has a substrate mounting position and a connector mounting position, and the positioning tool includes:

[0005] a base, which is formed with a placing cavity for placing the housing, and is provided with a locking mechanism for fixing the housing to the placing cavity;

[0006] a pressing block assembly for pressing the substrate placed in the substrate mounting position, so that the substrate is kept in the substrate mounting position during welding; and

[0007] an elastic limiting assembly arranged on the base and used for elastically pressing the connector placed in the connector mounting position, so that the connector is kept in the connector mounting position during welding.

[0008] In one of the embodiments, the elastic limiting assembly comprises a connecting pipe arranged in the base and formed with a sliding cavity, a pushing member partially arranged in the sliding cavity, the pushing member extending from one end of the sliding cavity to elastically press the connector, and an elastic member arranged in the sliding cavity and pressing the pushing member to make the pushing member have a tendency to slide out of the sliding cavity. The pushing member is arranged in the sliding cavity, and the elastic member presses the pushing member to make the pushing member press the connector. In addition, the elastic member can be deformed adaptively during the welding process between the connector and the shell, and the elastic member can be deformed adaptively with the melting of the solder, so that the pushing member moves to the direction of the connector and pushes the connector to make the connector and the shell have a good welding effect.

[0009] In one of the embodiments, the connecting pipe is provided with external threads, the base is provided with a threaded hole communicating with the outside, the connecting pipe is screwed in the threaded hole through the external threads, and the length of the external threads is greater than the length of the threaded hole. The connecting pipe is designed to be screwed with the base, and the position of the connecting pipe relative to the base can be adjusted by screwing, so that the degree of deformation of the elastic member can be adjusted by screwing the connecting pipe after the end of the pushing member contacts and presses the connector, and the pressure applied by the pushing member to the connector can be adjusted.

[0010] In one of the embodiments, the connecting pipe comprises a pipe body and a connecting block screwed in the pipe body, the connecting block and the inner wall of the pipe body cooperate to form the sliding cavity, and the elastic member is a compression spring, one end of the compression spring abuts against the connecting block and the other end abuts against the pushing member. The degree of deformation of the elastic member can be adjusted by screwing the connecting block, and the pressure applied by the pushing member to the connector can be adjusted. In addition, the connecting pipe is designed to be relatively detachable into two parts, which facilitates the assembly of the pushing member and the elastic member into the sliding cavity.

[0011] In one of the embodiments, the pushing member is in the shape of a shaft and formed with an annular flange, the opening of the sliding cavity is provided with an inwardly extending retaining ring, and the annular flange cooperates with the retaining ring to limit the pushing member from coming out of the sliding cavity.

[0012] In one of the embodiments, the base comprises a bottom plate and side plates arranged around the periphery of the bottom plate, the bottom plate and the side plates enclosing the placement cavity, and the elastic limiting assembly is arranged on the side plates; the locking mechanism comprises two sets of locking screws, each set of the locking screws is arranged in correspondence with two opposite side plates, the locking screws pass through the side plates and are threadedly connected with the side plates, and the two sets of locking screws are matched to clamp and fix the shell in the placement cavity. By arranging two sets of locking screws, the shell can be clamped from two opposite directions by the locking screws, so that the shell can be fixed in the placement cavity to prevent displacement of the shell during welding.

[0013] In one of the embodiments, the positioning tool further comprises a pre-positioning structure, the pre-positioning structure comprises a positioning protrusion formed on the bottom plate, and the positioning protrusion is used in cooperation with a positioning hole on the bottom of the shell; and / or, the pre-positioning structure comprises a positioning baffle formed on the bottom plate, and the positioning baffle is used in cooperation with the sidewall of the shell. By arranging the pre-positioning structure, the shell can be accurately placed into the placement cavity, and the assembly operation of the shell and the base is facilitated.

[0014] In one of the embodiments, the outer surface of the base on the side away from the placement cavity is a planar structure. In this way, the positioning tool can directly contact and adhere to the vacuum reflow platform in the vacuum reflow furnace through the planar structure of the bottom, so that higher heat conduction efficiency can be obtained during welding, and the temperature uniformity between the devices to be welded can be improved, thereby improving the welding efficiency and welding quality.

[0015] In one of the embodiments, the positioning tool further comprises a temperature measuring element, and the bottom plate is provided with a slot, and the temperature measuring element is inserted and fixed in the slot. The actual temperature in the placement cavity can be measured by the temperature measuring element during welding, so as to set the baking temperature curve of the vacuum reflow furnace.

[0016] In one of the embodiments, the pressing block assembly comprises a single-layer microstrip plate pressing block, a multi-layer microstrip plate pressing block and a circulator pressing block, and the single-layer microstrip plate pressing block, the multi-layer microstrip plate pressing block and the circulator pressing block are all provided with a avoiding groove. Directly arranging the pressing block assembly separated from the base simplifies the assembly operation of the positioning tool and the devices to be welded. After the devices to be welded are placed on the corresponding substrate mounting positions, the corresponding pressing block structure can be directly placed on the devices to be welded, and the devices to be welded can be effectively pressed by the self-weight of the pressing block structure, so that the devices to be welded can be kept in the corresponding substrate mounting positions.

[0017] The positioning tool for integrated welding of a microwave assembly provided by the application can position the to-be-welded devices integrally before welding, place the solder between each to-be-welded device and the corresponding mounting position in advance, and then put the whole structure obtained by assembling the positioning tool and the to-be-welded devices into a vacuum reflow oven for integrated welding. Not only can the welding efficiency be improved, but also the to-be-welded devices can be positioned by the locking mechanism, the pressing block assembly and the elastic limiting assembly, so as to prevent the position deviation of the to-be-welded devices, thereby improving the welding quality. In addition, the positioning tool can be repeatedly used for microwave assemblies of the same type and size, and the use cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structural schematic diagram of a positioning tool for integrated welding of a microwave assembly provided by an embodiment of the application;

[0019] Figure 2 A schematic diagram of positioning and assembling a microwave assembly to be welded by using the positioning tool provided by the embodiment;

[0020] Figure 3 An exploded view of positioning and assembling a microwave assembly to be welded by using the positioning tool;

[0021] Figure 4 A Figure 3 Another view of the exploded view;

[0022] Figure 5 An exploded view of the elastic limiting assembly in the positioning tool;

[0023] Figure 6 A sectional view of the elastic limiting assembly in the positioning tool;

[0024] Reference signs: 1, base; 10, bottom plate; 100, positioning protrusion; 101, positioning baffle; 102, insertion slot; 11, side plate; 12, locking screw; 2, pressing block assembly; 20, single-layer microstrip plate pressing block; 21, multi-layer microstrip plate pressing block; 22, circulator pressing block; 23, avoiding slot; 3, elastic limiting assembly; 30, connecting pipe; 300, pipe body; 301, connecting block; 302, sliding cavity; 303, external thread; 304, check ring; 31, pushing piece; 310, annular flange; 311, insertion hole; 312, pushing plate; 32, elastic piece; 4, shell; 40, substrate mounting position; 41, connector mounting position; 42, positioning hole; 5, connector; 50, insertion pin; 51, outer frame. DETAILED DESCRIPTION

[0025] In order to make the above object, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners without departing from the spirit of the present application. Those skilled in the art will appreciate the scope of the present application and can make similar modifications without departing from the spirit of the present application. Therefore, the present application is not limited by the embodiments disclosed below.

[0026] In the description of the present application, it should 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 do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0028] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "on", "above" and "on the surface" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a mediating element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0031] The present embodiment provides a positioning tool for integrated welding of a microwave assembly, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the microwave assembly includes a shell 4, a substrate (not shown in the figure) and a connector 5. Among them, the shell 4 has a substrate mounting position 40 and a connector mounting position 41, and when assembling, the substrate needs to be placed on the substrate mounting position 40 and welded and fixed to the substrate mounting position 40 through the welding process. At the same time, the connector 5 needs to be placed on the connector mounting position 41 and welded and fixed to the connector mounting position 41 through the welding process. The positioning tool provided by the present embodiment is used to pre-position the above-mentioned shell 4, substrate and connector 5 and other devices that need to be welded before welding, and assemble them into one body, prevent unnecessary displacement of the shell 4, substrate and connector 5 and other devices that need to be welded during the welding process, so as to complete the integrated welding assembly of the microwave assembly with higher welding efficiency and welding quality.

[0032] The positioning tool includes a base 1, a pressing block assembly 2 and an elastic limiting assembly 3. The base 1 is formed with a placing cavity for placing the shell 4, and the base 1 is provided with a locking mechanism for fixing the shell 4 to the placing cavity. The pressing block assembly 2 is used to press the substrate placed in the substrate mounting position 40, so that the substrate is kept in the substrate mounting position 40 during the welding process. The elastic limiting assembly 3 is arranged on the base 1 and is used to elastically press the connector 5 placed in the connector mounting position 41, so that the connector 5 is kept in the connector mounting position 41 during the welding process. When the positioning tool is applied, the to-be-welded devices can be pre-positioned integrally before welding, and the solder is pre-placed between each to-be-welded device and the corresponding mounting position, and then the whole structure obtained by assembling the positioning tool and the to-be-welded devices is placed into a vacuum reflow oven for integrated welding. The to-be-welded devices can be positioned by the locking mechanism, the pressing block assembly 2 and the elastic limiting assembly 3, so as to prevent the to-be-welded devices from deviating from the positions. Thus, the temperature gradient can be reduced, the risk of remelting displacement can be avoided, the welding time can be shortened, and the production efficiency and the welding quality can be greatly improved. In addition, the positioning tool can be repeatedly used for microwave assemblies of the same type and size, and the use cost is low.

[0033] In combination with the embodiments shown in Figure 5 and Figure 6 , the elastic limiting assembly 3 in the positioning tool includes a connecting pipe 30, a pushing piece 31 and an elastic piece 32. The connecting pipe 30 is arranged on the base 1 and is formed with a sliding cavity 302, the pushing piece 31 is partially slidably arranged in the sliding cavity 302, and one end of the pushing piece 31 extending out of the sliding cavity 302 is used to elastically press the connector 5. The elastic piece 32 is located in the sliding cavity 302 and presses the pushing piece 31 so that the pushing piece 31 has a tendency to slide out of the sliding cavity 302. By sliding the pushing piece 31 in the sliding cavity 302 and pressing the pushing piece 31 by the elastic piece 32, the pushing piece 31 can press the connector 5. In addition, since the elastic piece 32 can deform, during the welding process between the connector 5 and the shell 4, as the solder melts, the elastic piece 32 can adaptively deform, so that the pushing piece 31 moves to the direction of the connector 5 and pushes the connector 5, so that the connector 5 and the shell 4 have good welding effect.

[0034] It should be noted that different pressing structures can be arranged at the end of the pushing piece 31 facing the connector 5 according to different structures of the connector 5. In the present embodiment, taking the rectangular connector and the super small push-in connector (SMP connector) as examples. Figure 3 and Figure 4As shown in the figures, for the case that the connector 5 is a rectangular connector, a push plate 312 is arranged at the end of the pusher 31 facing the connector 5, and the push plate 312 is fixed to the end of the pusher 31 by a tight fit insertion through a connecting slot. In this way, the pusher 31 can be attached to the outer frame 51 of the rectangular connector through the push plate 312, and the elastic limiting assembly 3 can apply elastic pressure to the rectangular connector through the push plate 312. For the case that the connector 5 is an SMP connector, a plug hole 311 is arranged at the end of the pusher 31 facing the connector 5, which is adapted to the plug pin 50 of the SMP connector, and the elastic limiting assembly 3 can apply elastic pressure to the SMP connector through the plug hole 311 and the plug pin 50.

[0035] Further, the connecting pipe 30 in the embodiment is provided with an external thread 303, the base 1 is provided with a threaded hole which communicates with the outside, the connecting pipe 30 is screwed into the threaded hole through the external thread 303, and the length of the external thread 303 is greater than the length of the threaded hole. The connecting pipe 30 is designed to be screwed to the base 1, and the position of the connecting pipe 30 relative to the base 1 can be adjusted by screwing, so that after the end of the pusher 31 contacts and exerts pressure on the connector 5, the deformation degree of the elastic member 32 can be adjusted by screwing the connecting pipe 30, and thus the pressure applied by the pusher 31 to the connector 5 can be adjusted. In addition, the connecting pipe 30 in the embodiment includes a pipe body 300 and a connecting block 301 screwed into the pipe body 300, the connecting block 301 and the inner wall of the pipe body 300 cooperate to form a sliding cavity 302, and the elastic member 32 is a compression spring with one end abutting against the connecting block 301 and the other end abutting against the pusher 31. The deformation degree of the elastic member 32 can also be adjusted by screwing the connecting block 301, and thus the pressure applied by the pusher 31 to the connector 5 can be adjusted. In addition, the connecting pipe 30 is designed as two parts which can be detached relative to each other, facilitating the assembly operation of the pusher 31 and the elastic member 32 into the sliding cavity 302.

[0036] The elastic member 32 in the embodiment is a compression spring, and in other alternative embodiments, an elastic body such as a metal spring can also be used as the elastic member 32.

[0037] The elastic limiting assembly 3 applies a pre-compression force to the connector 5 to keep the connector 5 in the connector mounting position 41, and the above structure design enables the elastic limiting assembly 3 to have the function of adjusting the size of the pre-compression force. In this way, the elastic limiting assembly 3 can adapt to different models of connectors 5 through the above function of adjusting the pre-compression force, so that the elastic limiting assembly 3 has a larger application range.

[0038] The push member 31 in the embodiment is in the shape of a shaft and is formed with an annular flange 310. The opening of the sliding cavity 302 is provided with an inwardly extending stop ring 304. The annular flange 310 cooperates with the stop ring 304 to limit the push member 31 from being pulled out of the sliding cavity 302. During assembly, the connecting block 301 can be removed from the pipe body 300 first. Then the push member 31 is inserted into the pipe body 300 from the side where the connecting block 301 is located until the annular flange 310 on the push member 31 contacts the stop ring 304 on the pipe body 300. Then the connecting block 301 is screwed into the pipe body 300 so that the compression spring as the elastic member 32 is in a compressed state.

[0039] The base 1 in the embodiment includes a bottom plate 10 and side plates 11 arranged around the bottom plate 10. The bottom plate 10 and the side plates 11 enclose a placement cavity. The elastic limiting assembly 3 is arranged on the side plates 11. The locking mechanism includes two groups of locking screws 12. Each group of locking screws 12 is arranged in correspondence with an opposite side plate 11. The locking screw 12 passes through the side plate 11 and is threadedly connected with the side plate 11. The two groups of locking screws 12 cooperate to clamp and position the shell 4 in the placement cavity. By arranging the two groups of locking screws 12, the shell 4 can be clamped from two opposite directions by the locking screws 12, so that the shell 4 can be fixed in the placement cavity and prevented from being displaced during welding. Specifically, the outer contour of the base 1 in the embodiment is in the shape of a cuboid. The two opposite side plates 11 along the length direction of the base 1 are each provided with the locking screw 12. The two opposite side plates 11 along the width direction of the base 1 are each provided with the elastic limiting assembly 3.

[0040] The base 1 in the embodiment is made of aluminum alloy, which has good heat conduction performance and is easy to process. Compared with other metal materials, the aluminum alloy has a lower density, which can reduce the weight of the positioning tooling as a whole and facilitate assembly and handling operations.

[0041] Further, as shown in Figure 3 The positioning tooling provided by the embodiment further includes a pre-positioning structure arranged on the base 1. The pre-positioning structure includes a positioning protrusion 100 formed on the bottom plate 10 and a positioning baffle 101. The positioning protrusion 100 is used to cooperate with the positioning hole 42 at the bottom of the shell 4. The positioning baffle 101 is used to cooperate with the side wall of the shell 4. By arranging the pre-positioning structure, the shell 4 can be accurately placed in the placement cavity, and the assembly operation of the shell 4 and the base 1 is facilitated. It is easy to understand that in other alternative embodiments, the pre-positioning structure can only include the positioning protrusion 100 or the positioning baffle 101. In addition, the positioning tooling further includes a temperature measuring member (not shown in the figure), as shown in Figure 3As shown in FIG. 1, the bottom plate 10 is provided with a slot 102, and the temperature measuring member is inserted and fixed in the slot 102. The actual temperature in the placement cavity can be measured by the temperature measuring member during the soldering process, so as to set the baking temperature curve of the vacuum reflow furnace. The thermocouple can be used as the temperature measuring member.

[0042] As shown in FIG. 1, Figure 4 As shown in FIG. 1, the outer surface of the base 1 away from the placement cavity in the embodiment is a plane structure. In this way, the positioning tool can be directly attached to the vacuum reflow platform in the vacuum reflow furnace through the plane structure of the bottom, and a higher heat conduction efficiency can be obtained during the soldering process, and the temperature uniformity between the various devices to be soldered can be improved, thereby improving the soldering efficiency and the soldering quality.

[0043] For different substrate structures, the pressing block assembly 2 in the embodiment includes a single-layer microstrip plate pressing block 20, a multi-layer microstrip plate pressing block 21 and a circulator pressing block 22. It is easy to understand that the single-layer microstrip plate pressing block 20 is used to press the single-layer microstrip plate located in the substrate mounting position 40, the multi-layer microstrip plate pressing block 21 is used to press the multi-layer microstrip plate located in the substrate mounting position 40, and the circulator pressing block 22 is used to press the circulator located in the substrate mounting position 40. Directly arranging the pressing block assembly 2 separated from the base 1 simplifies the assembly operation of the positioning tool and the device to be soldered. After the device to be soldered is placed in the corresponding substrate mounting position 40, the corresponding pressing block structure is directly placed on the device to be soldered, and the self-weight of the pressing block structure can form effective pressure on the device to be soldered, so as to keep the device to be soldered in the corresponding substrate mounting position 40. In addition, the single-layer microstrip plate pressing block 20, the multi-layer microstrip plate pressing block 21 and the circulator pressing block 22 in the embodiment are all provided with a relief groove 23 for avoiding the structures such as the surface-mounted capacitor resistor, the circulator and the pin 50 on the connector 5.

[0044] Further, in the preferred scheme, the outer contour size of the single-layer microstrip plate pressing block 20 is smaller than that of the single-layer microstrip plate, the outer contour size of the multi-layer microstrip plate pressing block 21 is smaller than that of the multi-layer microstrip plate, and the outer contour size of the circulator pressing block 22 is smaller than that of the circulator, so as to facilitate the operation when the pressing block assembly 2 is placed on the corresponding substrate, and to prevent the edges of the pressing block assembly 2 from interfering with other structures.

[0045] As shown in FIG. 1, Figure 2 , Figure 3 and Figure 4 As shown in FIG. 1, the operation process of pre-positioning and assembling the microwave assembly to be soldered by using the positioning tool is as follows:

[0046] First, the elastic limiting assembly 3 is assembled and threaded to the side plate 11 of the base 1, and the locking screw 12 is also threaded to the side plate 11 of the base 1, and the assembly of the positioning tool is completed. Secondly, the shell 4 in the microwave assembly is placed in the placement cavity, and the shell 4 is locked and fixed in the placement cavity by screwing the locking screw 12. The solder soaked with the flux is placed on the connector 5, and the connector 5 with the solder is placed in the connector mounting position 41 on the shell 4. Then the end of the push piece 31 is elastically pressed to the connector 5 by screwing the connecting pipe 30. Similarly, the solder soaked with the flux is placed on the substrate mounting position 40 of the shell 4, and then the single-layer microstrip board, the multi-layer microstrip board and the circulator are correspondingly placed in the substrate mounting position 40. Finally, the single-layer microstrip board pressing block 20, the multi-layer microstrip board pressing block 21 and the circulator pressing block 22 are correspondingly pressed and placed on the single-layer microstrip board, the multi-layer microstrip board and the circulator. It should be noted that after the assembly of the positioning tool is completed for the first time, the elastic limiting assembly 3 and the locking screw 12 do not need to be removed from the base 1, which reduces the assembly operation steps and is very convenient to use.

[0047] Then the integrated welding operation can be performed. Specifically, the above-mentioned integrated positioning tool and microwave assembly are placed in a vacuum reflow furnace, a thermocouple is inserted and fixed in the insertion slot 102 on the base 1, and then integrated reflow soldering can be performed. After welding is completed and cooled, the pressing block assembly 2 is removed, and the connecting pipe 30 and the locking screw 12 are screwed outward, so that the positioning of the positioning tool on the microwave assembly is released, and the microwave assembly after welding can be taken out of the placement cavity.

[0048] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the description.

[0049] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, some modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A positioning tool for integrated welding of a microwave assembly, the microwave assembly comprising a housing (4), a substrate and a connector (5), the housing (4) having a substrate mounting site (40) and a connector mounting site (41), characterized in that, The positioning tool comprises: a base (1) which is formed with a placing cavity for placing the shell (4), and is provided with a locking mechanism for fixing the shell (4) to the placing cavity; a pressing block assembly (2) for pressing the substrate placed in the substrate mounting position (40) to make the substrate keep in the substrate mounting position (40) during welding; and a elastic limiting assembly (3) which is arranged on the base (1) and is used for elastically pressing the connector (5) placed in the connector mounting position (41) to make the connector (5) keep in the connector mounting position (41) during welding.

2. The positioning fixture of claim 1, wherein The elastic limiting assembly (3) comprises: a connecting pipe (30) which is arranged on the base (1) and is formed with a sliding cavity (302); a pushing piece (31) which is partially arranged in the sliding cavity (302), and one end of the pushing piece (31) extends out of the sliding cavity (302) and is used for elastically pressing the connector (5); and a elastic piece (32) which is arranged in the sliding cavity (302) and is used for pressing the pushing piece (31) to make the pushing piece (31) have a tendency to slide out of the sliding cavity (302).

3. The positioning fixture of claim 2, wherein The connecting pipe (30) is provided with external threads (303), the base (1) is provided with a threaded hole which is in communication with the outside, the connecting pipe (30) is screwed in the threaded hole through the external threads (303), and the length of the external threads (303) is greater than the length of the threaded hole.

4. The positioning fixture of claim 2, wherein The connecting pipe (30) comprises a pipe body (300) and a connecting block (301) which is screwed in the pipe body (300), the connecting block (301) cooperates with the inner wall of the pipe body (300) to form the sliding cavity (302), and the elastic piece (32) is a compression spring, one end of the compression spring abuts against the connecting block (301) and the other end abuts against the pushing piece (31).

5. The positioning fixture of claim 2 wherein, The pushing piece (31) is in the shape of a shaft and is formed with an annular flange (310), the opening of the sliding cavity (302) is provided with an inwardly extending stop ring (304), and the annular flange (310) cooperates with the stop ring (304) to limit the pushing piece (31) from coming out of the sliding cavity (302).

6. The positioning tool of any one of claims 1 to 5, wherein, The base (1) comprises a bottom plate (10) and side plates (11) which are arranged around the bottom plate (10), the bottom plate (10) and the side plates (11) cooperatively form the placing cavity, and the elastic limiting assembly (3) is arranged on the side plates (11); The locking mechanism comprises two groups of locking screws (12), and the two groups of locking screws (12) are arranged in one-to-one correspondence with two opposite side plates (11), the locking screws (12) pass through the side plates (11) and are screwed with the side plates (11), and the two groups of locking screws (12) are cooperatively used for clamping and positioning the shell (4) in the placing cavity.

7. The positioning fixture of claim 6 wherein, The positioning tool further comprises a pre-positioning structure, which comprises a positioning protrusion (100) formed on the bottom plate (10) and used for cooperating with a positioning hole (42) located at the bottom of the shell (4); And / or, the pre-positioning structure comprises a positioning baffle (101) formed on the bottom plate (10) and used for cooperating with the sidewall of the shell (4).

8. The positioning fixture of claim 6, wherein The outer surface of the base (1) on the side away from the placing cavity is a planar structure.

9. The positioning fixture of claim 6 wherein, The positioning tool further comprises a temperature measuring element, and the bottom plate (10) is provided with a slot (102), and the temperature measuring element is fixedly inserted into the slot (102).

10. The positioning tool of any one of claims 1 to 5, wherein, The block assembly (2) comprises a single-layer microstrip plate block (20), a multi-layer microstrip plate block (21) and a circulator block (22), and the single-layer microstrip plate block (20), the multi-layer microstrip plate block (21) and the circulator block (22) are all provided with an avoiding groove (23).

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