Welding equipment and welding method for waveguide tube assembly

Abstract

The present invention discloses a welding device for a waveguide tube assembly, wherein the waveguide tube assembly includes a waveguide tube and a flange seat, the flange seat includes a base and a connecting portion, a through hole is provided on the connecting portion and the base, and an annular step is provided at the junction of the connecting portion and the base; a limiting block is detachably installed on the flange seat, the limiting block includes a base and an insertion portion, the upper end of the base is located in the annular step, and the upper surface of the base is flush with the upper surface of the annular step; the welding device includes a wire feeding and winding mechanism, a high-frequency induction heating mechanism and a vibration device, and the vibration device is located at the bottom of the high-frequency induction heating mechanism. Therefore, by providing a limiting block in the flange seat, combining the wire feeding and winding mechanism, the high-frequency induction heating mechanism and the vibration device, the tin wire is distributed between the waveguide tube and the flange seat in a multi-turn winding manner, the tin wire is evenly distributed after being melted, the welding part has no spikes or serrations, the welding quality is high, the yield rate is high, and the welding efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of high-frequency signal transmission line welding technology, and in particular to a welding device and a welding method applied to a waveguide tube component. Background Art

[0002] At present, high-frequency signal transmission lines are often used in 5G base stations, broadcasting stations, aerospace, military fields, electrical information transmission lines and connectors, and optoelectronic transmission systems. The welding quality of high-frequency signal transmission lines has a great impact on the stability and efficiency of signal transmission.

[0003] In particular, the solder connection between the waveguide tube used to carry signal lines and the flange base is generally heated by a soldering iron, medium-high frequency induction heating, or laser heating. Regardless of the heating method, soldering is performed by feeding tin wire to the welding area after heating. This tin feeding method is not only inefficient but also easily leads to undesirable conditions such as unevenness, jaggedness, and spikes in the weld area, resulting in abnormal signal transmission standing wave ratios, easy signal loss, low efficiency, and high noise. This leads to a high product defect rate, resulting in both waste and production capacity losses. Therefore, the existing welding equipment for waveguide tubes used to carry high-frequency signal transmission lines and their flange bases should be improved to address the above problems. Summary of the Invention

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a welding device and a welding method for a waveguide tube assembly. The device sets a limit block in the flange seat, combines a wire feeding and winding mechanism, a high-frequency induction heating mechanism, and a vibration device to distribute the tin wire between the waveguide tube and the flange seat in a multi-turn winding manner, so that the tin wire is evenly distributed after being melted, and the welding part has no thorns or serrations, with high welding quality, high yield rate, and high welding efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A welding device for a waveguide tube assembly, the waveguide tube assembly includes a waveguide tube and a flange seat connected to the end of the waveguide tube, the flange seat includes a base and a connecting portion integrally provided on the base for connecting to the waveguide tube, a through hole is provided through the connecting portion and the base, and an annular step is provided at the junction of the connecting portion and the base to abut the end of the waveguide tube, wherein a limiting block is detachably inserted on the flange seat, and the limiting block includes a base and a connecting portion integrally provided on the base for inserting into the waveguide tube Insertion part, the upper end of the base is located in the through hole, and the upper surface of the base is flush with the upper surface of the annular step; the welding equipment includes a wire feeding and winding mechanism for feeding tin wire and winding it on the insertion part, a high-frequency induction heating mechanism located outside the flange seat for melting the tin wire on the insertion part and welding the end of the waveguide tube to the connecting part of the flange seat and having a temperature control function, and a vibration device for vibrating the flange seat when the high-frequency induction heating mechanism is working to evenly distribute the molten tin wire. The vibration device is located at the bottom of the flange seat and the limiting block.

[0007] As a preferred solution, the welding equipment also includes a turntable and a manipulator for clamping the flange seat and the waveguide tube. The wire feeding and winding mechanism and the high-frequency induction heating mechanism are arranged in sequence on the side of the turntable along the rotation direction of the turntable. A plurality of jigs for placing the flange seat are arranged at intervals on the turntable; the bottom of the limit block is installed on the jig, and the upper part of the limit block is installed in the flange seat; the manipulator moves back and forth above the turntable.

[0008] As a preferred solution, the welding equipment also includes a wire pressing mechanism, which is located beside the turntable and between the wire feeding and winding mechanism and the high-frequency induction heating mechanism. It includes a wire pressing bracket, a wire pressing cylinder and a wire pressing block. The wire pressing cylinder is vertically installed on the wire pressing bracket, and the wire pressing block is installed on the axial end of the wire pressing cylinder and faces the limit block.

[0009] As a preferred solution, the wire feeding and winding mechanism includes a wire feeding and winding bracket and a wire feeding device and a winding device installed on the wire feeding and winding bracket, the wire feeding device includes a wire reel for winding tin wire and a wire paying-off assembly for paying-off the wire, and the wire paying-off assembly is connected to the wire reel; the winding device includes a winding column with the same cross-section as the limiting block, a winding motor for driving the winding column to rotate, and a wire pushing assembly for pushing the tin wire wound on the winding column down to the limiting block.

[0010] As a preferred solution, the wire pushing assembly includes a wire pushing sleeve and a wire pushing driving cylinder for driving the wire pushing sleeve to rise and fall. The wire pushing sleeve can be movably mounted on the winding column up and down. The output end of the wire pushing driving cylinder is connected to a wire pushing block, and the wire pushing block is connected to the wire pushing sleeve.

[0011] As a preferred solution, the pay-off assembly includes a pay-off motor, a gear set and multiple wire pulleys. The pay-off motor and the gear set are connected by a belt drive. The tin wire on the reel passes around the multiple wire pulleys in sequence and then reaches the winding column through the gear set.

[0012] As a preferred solution, the high-frequency induction heating mechanism includes a left half heating coil, a left half heating coil driving device, a right half heating coil and a right half heating coil driving device. The left half heating coil is connected to the output end of the left half heating coil driving device, and the right half heating coil is connected to the output end of the right half heating coil driving device. The left half heating coil is driven by the left half heating coil driving device, and the right half heating coil is driven by the right half heating coil driving device, and they are connected to each other to form a closed heating coil surrounding the outside of the flange seat.

[0013] As a preferred solution, the vibration device includes a vibrator and a lifting drive cylinder that drives the vibrator to move up and down to approach or move away from the flange seat. The lifting drive cylinder is vertically installed below the flange seat, and the vibrator is installed at the shaft end of the lifting drive cylinder.

[0014] As a preferred solution, the lower end of the base of the limiting block has a limiting step. When the base is inserted into the through hole of the flange seat, the limiting step blocks the outside of the flange seat, and a threaded hole is opened on the base to facilitate the installation and removal of the limiting block in the flange seat.

[0015] A welding method applied to the welding device as described above comprises the following steps:

[0016] S1. Place the flange seat in the fixture corresponding to the wire feeding and winding mechanism station on the turntable. At this time, the limit block on the fixture is inserted into the flange seat, and the upper surface of the base of the limit block is flush with the upper surface of the internal annular step of the flange seat;

[0017] S2. The wire feeding device unwinds the wire, and the winding device winds the wire on the winding post. When the number of tin coils on the winding post reaches a predetermined number, the tin wire is cut off; the wire pushing assembly pushes the tin wire wound on the winding post downward onto the limit block, and makes the lower end of the tin wire on the limit block rest on the annular step of the flange seat;

[0018] S3. The turntable rotates to rotate the flange seat and the winding limit block to the wire pressing mechanism. The wire pressing mechanism further presses down the multiple turns of tin wire on the limit block, making the tin wire wound on the limit block tighter.

[0019] S4. The turntable continues to rotate, and the flange seat and the limit block after the wire pressing are rotated to the high-frequency induction heating mechanism station. The high-frequency induction heating mechanism heats the tin wire on the outside of the flange seat and controls the temperature change; the end of the waveguide is inserted into the connecting part of the flange seat, and the upper end of the insertion part of the limit block is inserted into the waveguide, and the tin wire melts; during the heating and melting process of the tin wire, the robot clamps the waveguide and applies downward pressure, so that the waveguide is gradually inserted into the bottom inside the flange seat during the melting process of the tin wire; the vibration device is started to vibrate the melted tin wire evenly;

[0020] S5. After the tin wire is completely melted into liquid and evenly distributed, the high-frequency induction heating mechanism stops heating. After the tin cools down, the waveguide is fixedly connected to the flange seat.

[0021] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that by cooperating with the wire feeding and winding mechanism, the high-frequency induction heating mechanism and the vibration device to form a welding device for the waveguide assembly, the welding device has the following advantages:

[0022] First, the base of the limiting block can completely block the through hole of the flange seat to prevent tin leakage.

[0023] Second, the insertion part of the limiting block can be wrapped with multiple turns of tin wire and can be inserted into the waveguide to position the waveguide. The tin wire is distributed between the waveguide and the flange seat in a multiple-turn winding manner, which provides the condition for uniform distribution of welding materials for subsequent fusion welding operations; the multiple turns of tin wire are evenly distributed after being melted, and the welding parts have no thorns or serrations. The welding quality is high and the yield rate is high, which provides a strong guarantee for the high-quality transmission of high-frequency signals. At the same time, compared with the traditional method of feeding tin wire while fusion welding, the welding efficiency is higher and the operation is more convenient.

[0024] Third, the vibration device can make the molten tin oscillate evenly between the waveguide and the flange seat, so that the connection position between the two is completely sealed and welded.

[0025] Fourth, the wire feeding and winding mechanism adopts the steps of wire feeding, wire winding and wire pushing to realize the direct transfer of multiple turns of tin wire to the limiting block. The structure and process are simple, and the operation is quick and convenient.

[0026] Fifth, the high-frequency induction heating mechanism adopts left and right closing heating rings for closing heating. The left half heating ring and the right half heating ring can be separated at any time, realizing a simpler mechanical design and providing a larger operating space for taking out the waveguide assembly after welding, which is convenient for taking out the material.

[0027] To more clearly illustrate the structural features and effects of the present invention, it is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1This is a first-view perspective diagram of the welding equipment of the present invention;

[0029] Figure 2 A second perspective schematic diagram of the welding equipment of the present invention;

[0030] Figure 3 A schematic top view of the welding equipment of the present invention;

[0031] Figure 4 It is a three-dimensional schematic diagram of the wire feeding and winding mechanism of the present invention;

[0032] Figure 5 It is a partial cross-sectional schematic diagram of the wire feeding and winding mechanism of the present invention;

[0033] Figure 6 It is a cross-sectional schematic diagram of the tin wire in the melting welding state of the present invention;

[0034] Figure 7 This is a three-dimensional schematic diagram of the limiting block of the present invention;

[0035] Figure 8 It is a three-dimensional schematic diagram of the flange seat of the present invention;

[0036] Figure 9 This is a three-dimensional schematic diagram of the flange seat of the present invention from another perspective;

[0037] Figure 10 This is a three-dimensional schematic diagram of the finished welded waveguide assembly of the present invention;

[0038] Figure 11 for Figure 5 The enlarged schematic diagram of M;

[0039] Figure 12 for Figure 6 The enlarged schematic diagram of point N is shown.

[0040] Description of the accompanying drawings:

[0041] 10. Wire feeding and winding mechanism; 11. Wire feeding and winding bracket; 12. Wire feeding device; 121. Wire drum; 122. Wire pay-off assembly; 1221. Wire pay-off motor; 1222. Gear set; 1223. Wire reel; 13. Winding device; 131. Winding column; 132. Winding motor; 133. Wire pushing assembly; 1331. Wire pushing sleeve; 1332. Wire pushing drive cylinder; 1333. Wire pushing block; 134. Lifting and lowering adjustment device; 20. High-frequency induction heating mechanism; 21. Left half heating coil; 22. Left half heating coil drive device; 23. Right half heating coil; 24. Right half heating coil Hot ring drive device; 30. Vibration device; 31. Vibrator; 32. Lifting drive cylinder; 40. Waveguide tube assembly; 41. Waveguide tube; 42. Flange seat; 421. Base; 422. Connecting part; 423. Through hole; 424. Annular step; 50. Limit block; 51. Base; 52. Insertion part; 53. Threaded hole; 54. Limit step; 60. Turntable; 61. Fixture; 62. Material sensing sensor; 70. Wire pressing mechanism; 71. Wire pressing bracket; 72. Wire pressing cylinder; 73. Wire pressing block; 80. Material tray; 90. Robot; 100. Tin coil. DETAILED DESCRIPTION

[0042] The present invention Figures 1 to 12 As shown, a welding device and welding method for a waveguide tube assembly 40 are provided. The welding device includes a wire feeding and winding mechanism 10 for feeding tin wire and winding it around the insertion portion 52, a high-frequency induction heating mechanism 20 located outside the flange seat 42 for melting the tin wire on the insertion portion 52 and welding the end of the waveguide tube to the connection portion 422 of the flange seat 42, and a vibration device 30 for vibrating the flange seat 42 when the high-frequency induction heating mechanism 20 is in operation to evenly distribute the melted tin wire.

[0043] The waveguide tube assembly 40 includes a waveguide tube 41 (made of metal) and a flange seat 42 (made of metal) connected to the end of the waveguide tube; the flange seat 42 includes a base 421 and a connecting portion 422 integrally provided on the base 421 for connecting to the waveguide tube 41, a through hole 423 is provided through the connecting portion 422 and the base 421, and an annular step 424 is provided at the junction of the connecting portion 422 and the base 421 to abut the end of the waveguide tube 41; A stopper block 50 (made of non-metallic material) is detachably inserted into the flange seat 42. The stopper block 50 includes a base 51 and an insertion portion 52 integrally provided on the base 51 for insertion into the waveguide 41. The base 51 has a stopper step 54 at its lower end. The upper end of the base 51 and the insertion portion 52 are located in the through hole 423. The upper surface of the base 51 is flush with the upper surface of the annular step 424, and the stopper step 54 blocks the outer side of the lower end of the flange seat 42. The length by which the lower end of the base 51 of the stopper block 50 extends outside the flange seat 42 is determined according to actual needs to facilitate installation and removal. A threaded hole 53 is provided on the base 51 to facilitate installation and removal of the stopper block 50 from the flange seat 42. Specifically, when installing and removing the stopper block 50, a screw can be installed in the threaded hole 53, and the screw can be used in combination with other tools such as clamps or pliers to install and remove the stopper block 50.

[0044] The welding equipment also includes a turntable 60, which is driven by a motor and rotates in a counterclockwise direction. The wire feeding and winding mechanism 10 and the high-frequency induction heating mechanism 20 are sequentially arranged on the side of the turntable 60 along the direction of rotation of the turntable 60, and a plurality of jigs 61 for placing the flange seat 42 are arranged at intervals on the turntable 60. In this embodiment, the lower end of the base of the limiting block 50 is fixed to the jig 61. After welding is completed, the waveguide assembly 40 can be directly pulled out from the limiting block 50, so there is no need to use the above-mentioned threaded hole installation screw method for disassembly; if the waveguide assembly 40 cannot be disassembled from the limiting block, it can also be attempted to use the screw installation method to cooperate with disassembly. In addition, a material sensing sensor 62 is provided on the turntable 60 corresponding to each jig 61 to determine whether there is material in the jig 61.

[0045] The wire feeding and winding mechanism 10 includes a wire feeding and winding bracket 11 and a wire feeding device 12 and a winding device 13 installed on the wire feeding and winding bracket 11. The wire feeding device 12 includes a wire reel 121 for winding tin wire and a wire paying-off assembly 122 for paying out the wire, and the wire paying-off assembly 122 is connected to the wire reel 121; the winding device 13 includes a winding column 131 with the same cross-section as the limiting block 50, a winding motor 132 for driving the winding column 131 to rotate, and a wire pushing assembly 133 for pushing the tin wire wound on the winding column 131 down to the limiting block 50. The wire pushing assembly 133 includes a wire pushing sleeve 1331 and a wire pushing driving cylinder 1332 for driving the wire pushing sleeve 1331 to rise and fall. The wire pushing sleeve 1331 can be movably mounted on the winding column 131 up and down. The output end of the wire pushing driving cylinder 1332 is connected to a wire pushing block 1333, and the wire pushing block 1333 is connected to the wire pushing sleeve 1331.

[0046] The winding device 13 also includes a lifting and adjusting device 134 for driving the winding motor 132 to lift and lower to adjust the winding height. The lifting and adjusting device 134 can be in the form of a cylinder or a motor combined with a screw slider. After the winding post 131 is wound with multiple turns of tin wire and cut (the number of winding turns is set according to the wire diameter of the tin wire, the thicker the wire diameter, the fewer the winding turns; the thinner the wire diameter, the more the winding turns), the wire pushing sleeve 1331 pushes the wound multiple turns of tin wire downward to the insertion portion 52 mounted on the limiting block 50. In order to make it easier for the wound tin coil to be directly mounted on the limiting block 50, the top of the insertion portion 52 of the limiting block 50 is set to a wedge shape to facilitate the downward mounting of the tin coil on the insertion portion 52; the wire pushing sleeve 1331 is pushed upward to away from the winding area when the winding post 131 is winding.

[0047] The pay-off assembly 122 includes a pay-off motor 1221, a gear set 1222 and multiple wire pulleys 1223. The pay-off motor 1221 and the gear set 1222 are connected by a belt drive. The tin wire on the reel 121 is sequentially wound around the multiple wire pulleys 1223 and then transmitted to the winding column 131 through the engagement of the gear set 1222.

[0048] The high-frequency induction heating mechanism 20 has a temperature control function and includes a left heating coil 21, a left heating coil driver 22, a right heating coil 23, and a right heating coil driver 24. The left heating coil 21 is connected to the output of the left heating coil driver 22, while the right heating coil 23 is connected to the output of the right heating coil driver 24. Driven by the left heating coil driver 22, the left heating coil 21 and the right heating coil 23 are connected to each other, forming a closed heating coil surrounding the flange seat 42. The left and right heating coil drivers 22 and 24 can be pneumatic cylinders or motors combined with screw sliders. The left and right heating coils are combined for heating, and the left and right heating coils 21 and 23 can be separated at any time, providing ample space for removing the welded waveguide assembly 40.

[0049] The vibration device 30 is located at the workstation of the high-frequency induction heating mechanism 20 and is located at the bottom of the flange seat 42 and the bottom of the limiting block 50. It includes a vibrator 31 and a lifting drive cylinder 32 that drives the vibrator 31 to move closer to or away from the flange seat 42. The lifting drive cylinder 32 is vertically installed below the flange seat 42, and the vibrator 31 is installed at the shaft end of the lifting drive cylinder 32. When the flange seat 42 needs to be vibrated, the lifting drive cylinder 32 drives the vibrator 31 to rise and closely contact the lower surface of the jig 61 for vibration operation. When vibration is not required, the lifting drive cylinder 32 drives the vibrator 31 to descend and away from the jig 61.

[0050] The welding equipment also includes a wire pressing mechanism 70, which is located beside the turntable 60 and between the wire feeding and winding mechanism 10 and the high-frequency induction heating mechanism 20. It includes a wire pressing bracket 71, a wire pressing cylinder 72 and a wire pressing block 73. The wire pressing cylinder 72 is vertically installed on the wire pressing bracket 71, and the wire pressing block 73 is installed on the axial end of the wire pressing cylinder 72 and faces the limiting block 50; the pressing block 73 can be in the form of a sleeve with an inner hole slightly larger than the insertion part 52 of the limiting block 50. When the wire pressing block 73 is driven downward by the wire pressing cylinder 72, the multiple turns of tin wire wound on the limiting block 50 can be squeezed and arranged more tightly, which promotes the uniformity of the molten tin during welding.

[0051] In addition, the welding equipment also has a material tray 80 for holding the flange seat 42 and a robot 90 for transferring the flange seat 42 from the material tray 80 to the jig 61 of the turntable 60 in sequence. At the same time, the robot 90 can be used to complete the unloading operation of the waveguide tube assembly 40 by welding; moreover, the robot 90 can clamp the waveguide tube 41 during the welding process of the waveguide tube 41 and the flange seat 42 through the tin wire to apply a downward force to the waveguide tube 41, so that the waveguide tube 41 and the flange seat 42 can be welded faster and more firmly.

[0052] A welding method applied to the welding device as described above comprises the following steps:

[0053] S1. Place the flange seat 42 in the jig 61 corresponding to the working position of the wire feeding and winding mechanism 10 on the turntable 60. At this time, the limiting block 50 on the jig 61 is inserted into the flange seat 42, and the limiting step 54 of the limiting block 50 blocks the outer side of the lower end of the flange seat 42, so that the upper surface of the base 51 of the limiting block 50 is flush with the upper surface of the annular step 424 inside the flange seat 42;

[0054] S2. The wire feeding device 12 unwinds the wire, and the winding device 13 winds the wire on the winding post 131. When the number of tin wire turns on the winding post 131 reaches a predetermined number, the tin wire is cut off. The wire pushing assembly 133 pushes the multiple turns of tin wire wound on the winding post 131 downward onto the limiting block 50, and causes the lower end of the tin wire on the limiting block 50 to abut against the annular step 424 of the flange seat 42.

[0055] S3. The turntable 60 rotates to rotate the flange seat 42 and the winding limit block 50 to the wire pressing mechanism 70. The wire pressing mechanism 70 further presses down the multiple turns of tin wire on the limit block 50, so that the multiple turns of tin wire on the limit block 50 are arranged more tightly.

[0056] S4, the turntable 60 continues to rotate, and the flange seat 42 and the limiting block 50 after the wire pressing are rotated to the working position of the high-frequency induction heating mechanism 20. The high-frequency induction heating mechanism 20 heats the tin wire on the outside of the flange seat 42 and controls the temperature change; the end of the waveguide 41 extends into the connecting portion 422 of the flange seat 42, and the upper end of the insertion portion 52 of the limiting block 50 is inserted into the waveguide 41, and the tin wire melts; during the heating and melting process of the tin wire, the manipulator 90 clamps the waveguide and applies downward pressure, so that the waveguide is gradually inserted into the bottom inner side of the flange seat during the melting process of the tin wire; the vibration device 30 is started to vibrate the melted tin wire evenly;

[0057] S5. After the tin wire is completely melted into liquid and evenly distributed, the high-frequency induction heating mechanism 20 stops heating. After the tin cools down, the waveguide 41 is fixedly connected to the flange seat 42.

[0058] S6. Remove the limiting block 50 from the flange seat 42 through the threaded hole 53 at the rear end of the limiting block 50, and the welding is completed. It should be noted that step S6 can be omitted according to actual conditions.

[0059] The temperature control portion of the high-frequency induction heating mechanism 20 is composed of an infrared temperature probe for detecting temperature and a temperature control box. The temperature control box can also be integrated with the high-frequency heating main unit. Since the temperature control portion and the winding rod 131 wire hanging and cutting during operation can be solved by existing technologies, they will not be described in detail in this application.

[0060] The design focus of the present invention is to form a welding device for the waveguide assembly 40 by cooperating with the wire feeding and winding mechanism, the high-frequency induction heating mechanism, and the vibration device. The welding device has the following advantages:

[0061] First, the base of the limiting block can completely block the through hole of the flange seat to prevent tin leakage.

[0062] Second, the insertion part of the limiting block can be wrapped with multiple turns of tin wire and can be inserted into the waveguide to position the waveguide. The tin wire is distributed between the waveguide and the flange seat in a multiple-turn winding manner, which provides the condition for uniform distribution of welding materials for subsequent fusion welding operations; the multiple turns of tin wire are evenly distributed after being melted, and the welding parts have no thorns or serrations. The welding quality is high and the yield rate is high, which provides a strong guarantee for the high-quality transmission of high-frequency signals. At the same time, compared with the traditional method of feeding tin wire while fusion welding, the welding efficiency is higher and the operation is more convenient.

[0063] Third, the vibration device can make the molten tin oscillate evenly between the waveguide and the flange seat, so that the connection position between the two is completely sealed and welded.

[0064] Fourth, the wire feeding and winding mechanism adopts the steps of wire feeding, wire winding and wire pushing to realize the direct transfer of multiple turns of tin wire to the limiting block. The structure and process are simple, and the operation is quick and convenient.

[0065] Fifth, the high-frequency induction heating mechanism adopts left and right closing heating rings for closing heating. The left half heating ring and the right half heating ring can be separated at any time, realizing a simpler mechanical design and providing a larger operating space for taking out the waveguide assembly after welding, which is convenient for taking out the material.

[0066] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A welding device for a waveguide assembly, the waveguide assembly comprising a waveguide and a flange seat connected to an end of the waveguide, the flange seat comprising a base and a connecting portion integrally provided on the base for connecting to the waveguide, a through hole being provided through the connecting portion and the base, and an annular step being provided at the junction of the connecting portion and the base for abutting the end of the waveguide, characterized in that: A limiting block is detachably inserted on the flange seat, and the limiting block includes a base and an insertion part integrally arranged on the base for inserting into the waveguide tube, the upper end of the base is located in the through hole, and the upper surface of the base is flush with the upper surface of the annular step; the welding equipment includes a wire feeding and winding mechanism for feeding tin wire and winding it on the insertion part, a high-frequency induction heating mechanism located on the outside of the flange seat for melting the tin wire on the insertion part and welding the end of the waveguide tube to the connecting part of the flange seat and having a temperature control function, a vibration device and a wire pressing mechanism for vibrating the flange seat when the high-frequency induction heating mechanism is working to evenly distribute the molten tin wire, and the wire feeding and winding mechanism includes a wire feeding and winding bracket and a wire feeding device and a winding device installed on the wire feeding and winding bracket, the winding device includes a winding column with the same cross-section as the limiting block, a winding motor for driving the winding column to rotate, and a wire pushing assembly for pushing the tin wire wound on the winding column down to the limiting block; the vibration device is located at the bottom of the flange seat and the limiting block.

2. The welding device for waveguide tube assembly according to claim 1, characterized in that: It also includes a turntable and a manipulator for clamping the flange seat and the waveguide tube. The wire feeding and winding mechanism and the high-frequency induction heating mechanism are arranged in sequence on the side of the turntable along the rotation direction of the turntable. A plurality of jigs for placing the flange seat are arranged at intervals on the turntable; the bottom of the limit block is installed on the jig, and the upper part of the limit block is installed in the flange seat; the manipulator moves back and forth above the turntable.

3. The welding device for waveguide tube assembly according to claim 2, characterized in that: The wire pressing mechanism is located beside the turntable and between the wire feeding and winding mechanism and the high-frequency induction heating mechanism. It includes a wire pressing bracket, a wire pressing cylinder and a wire pressing block. The wire pressing cylinder is vertically installed on the wire pressing bracket, and the wire pressing block is installed on the axial end of the wire pressing cylinder and faces the limit block.

4. The welding device for a waveguide assembly according to claim 1, characterized in that: The wire feeding device includes a wire drum for winding tin wire and a wire pay-off assembly for paying out the wire, and the wire pay-off assembly is connected to the wire drum.

5. The welding device for waveguide tube assembly according to claim 4, characterized in that: The wire pushing assembly includes a wire pushing sleeve and a wire pushing driving cylinder for driving the wire pushing sleeve to rise and fall. The wire pushing sleeve can be movably sleeved on the winding column up and down. The output end of the wire pushing driving cylinder is connected to a wire pushing block, and the wire pushing block is connected to the wire pushing sleeve.

6. The welding device for waveguide tube assembly according to claim 4, characterized in that: The pay-off assembly includes a pay-off motor, a gear set and multiple wire wheels. The pay-off motor and the gear set are connected through a belt drive. After the tin wire on the wire drum passes through the multiple wire wheels in sequence, it reaches the winding column through the gear set.

7. The welding device for a waveguide assembly according to claim 1, characterized in that: The high-frequency induction heating mechanism includes a left half heating coil, a left half heating coil driving device, a right half heating coil and a right half heating coil driving device. The left half heating coil is connected to the output end of the left half heating coil driving device, and the right half heating coil is connected to the output end of the right half heating coil driving device. The left half heating coil is driven by the left half heating coil driving device, and the right half heating coil is driven by the right half heating coil driving device. The left half heating coil and the right half heating coil are connected to each other to form a closed heating coil surrounding the outside of the flange seat.

8. The welding device for a waveguide assembly according to claim 7, characterized in that: The vibration device includes a vibrator and a lifting drive cylinder that drives the vibrator to move up and down to approach or away from the flange seat. The lifting drive cylinder is vertically installed below the flange seat, and the vibrator is installed on the shaft end of the lifting drive cylinder.

9. The welding device for a waveguide assembly according to claim 1, characterized in that: The lower end of the base of the limiting block has a limiting step. When the base is inserted into the through hole of the flange seat, the limiting step blocks the outside of the flange seat, and a threaded hole is opened on the base to facilitate the installation and removal of the limiting block in the flange seat.

10. A welding method applied to the welding equipment according to any one of claims 1 to 9, characterized in that: The following steps are included: S1. Place the flange seat in the fixture corresponding to the wire feeding and winding mechanism station on the turntable. At this time, the limit block on the fixture is inserted into the flange seat, and the upper surface of the base of the limit block is flush with the upper surface of the internal annular step of the flange seat; S2. The wire feeding device unwinds the wire, and the winding device winds the wire on the winding post. When the number of tin coils on the winding post reaches a predetermined number, the tin wire is cut off; the wire pushing assembly pushes the tin wire wound on the winding post downward onto the limit block, and makes the lower end of the tin wire on the limit block rest on the annular step of the flange seat; S3. The turntable rotates to rotate the flange seat and the winding limit block to the wire pressing mechanism. The wire pressing mechanism further presses down the multiple turns of tin wire on the limit block, making the tin wire wound on the limit block tighter. S4. The turntable continues to rotate, and the flange seat and the limit block after the wire pressing are rotated to the high-frequency induction heating mechanism station. The high-frequency induction heating mechanism heats the tin wire on the outside of the flange seat and controls the temperature change; the end of the waveguide is inserted into the connecting part of the flange seat, and the upper end of the insertion part of the limit block is inserted into the waveguide, and the tin wire melts; during the heating and melting process of the tin wire, the robot clamps the waveguide and applies downward pressure, so that the waveguide is gradually inserted into the bottom inside the flange seat during the melting process of the tin wire; the vibration device is started to vibrate the melted tin wire evenly; S5. After the tin wire is completely melted into liquid and evenly distributed, the high-frequency induction heating mechanism stops heating. After the tin cools down, the waveguide is fixedly connected to the flange seat.

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