A selective wave soldering automatic spray device

Abstract

The present invention belongs to the technical field of wave soldering machines, and discloses a selective wave soldering automatic spray device, and its technical key points are: comprising a workbench, support rods are fixedly installed on all sides of the workbench, a top plate is fixedly installed on the top ends of multiple groups of support rods, a bearing plate is arranged between the top plate and the workbench, a welding machine is fixedly installed on the surface of the bearing plate, a welding pipe distributed vertically downward is fixedly installed on the bottom wall of the bearing plate, a lifting component is arranged between the top plate and the workbench, a cross plate is sleeved on the outer side of the welding pipe, a guide component is arranged on the side wall of the welding pipe, two groups of relatively distributed positioning columns are fixedly installed on the bottom wall of the cross plate, a spray component is arranged on the surface of the cross plate, a control mechanism is arranged on the surface of the positioning column, and the control mechanism includes a positioning component and an adjustment component, which solves the problem that the current need to manually adjust the relative positions of the spray component and the welding component and the welding point in sequence has great limitations, resulting in low overall welding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wave soldering machines, in particular to a selective wave soldering automatic spray device. Background Art

[0002] Wave soldering machine refers to a machine that sprays molten soft solder (lead-tin alloy) into a solder wave crest as required by the design through an electric pump or electromagnetic pump. It can also be formed by injecting nitrogen into the solder pool, so that a printed circuit board pre-installed with components passes through the solder wave crest, achieving soft soldering of mechanical and electrical connections between the component terminals or pins and the printed circuit board pads.

[0003] In the wave soldering process, a specific spray device is required to spray flux on the surface of the soldering point. The existing spray components are relatively independent of the soldering components. When performing wave soldering on the workpiece, the relative positions of the spray components, soldering components and soldering points need to be adjusted manually in sequence, which has great limitations and leads to low overall soldering efficiency. Summary of the invention

[0004] The object of the present invention is to provide a selective wave soldering automatic spray device to solve the problems raised in the above background technology.

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

[0006] A selective wave soldering automatic spray device comprises a workbench, wherein support rods are fixedly installed on all sides of the workbench, a top plate is fixedly installed on the top ends of multiple groups of support rods, a bearing plate is arranged between the top plate and the workbench, a welding machine is fixedly installed on the surface of the bearing plate, a welding pipe vertically distributed downward is fixedly installed on the bottom wall of the bearing plate, a welding head is arranged at the bottom end of the welding pipe, a lifting component cooperating with the bearing plate is arranged between the top plate and the workbench, the lifting component is used to control the bearing plate to move in a vertical direction, a cross plate is sleeved on the outer side of the welding pipe, a guide component cooperating with the cross plate is arranged on the side wall of the welding pipe, the guide component is used to control the cross plate to move along the axis direction of the welding pipe on the outer side of the welding pipe, two groups of relatively distributed positioning columns are fixedly installed on the bottom wall of the cross plate, and a spray component is arranged on the surface of the cross plate Part, the spray assembly includes two groups of relatively distributed spray storage boxes fixedly installed on the surface of the horizontal plate, a pump is arranged on the surface of the spray storage box, the output end of the pump is connected to a conduit, the end of the conduit away from the pump is connected to an atomizing nozzle, the surface of the positioning column is provided with a control mechanism that cooperates with the atomizing nozzle, the control mechanism includes a positioning assembly and an adjustment assembly, the positioning assembly is located on the surface of the positioning column and is connected to the atomizing nozzle, the positioning assembly controls the atomizing nozzle to remain in a vertical downward state on the outside of the positioning column when not spraying, the adjustment assembly is located on the surface of the positioning column and is connected to the positioning assembly, when the welding pipe and the welding head move downward, the adjustment assembly controls the atomizing nozzle to rotate toward the position to be welded and automatically sprays by cooperating with the positioning assembly.

[0007] As a further solution of the present invention: the lifting assembly includes multiple groups of threaded rods rotatably installed between the top plate and the workbench, the threaded rods are threadedly connected to the load-bearing plate, synchronous gear plates are fixedly installed on the surface of the threaded rods, the multiple groups of synchronous gear plates are commonly connected to a synchronous belt, and the top end of a group of threaded rods extends to the surface of the top plate and is connected to a motor.

[0008] As a further solution of the present invention: the guide assembly includes a bottom ring fixedly installed on the surface of the welded tube and located below the horizontal plate, a top ring fixedly installed on the surface of the welded tube and located above the horizontal plate, a plurality of groups of guide rods fixedly installed between the bottom ring and the top ring, the guide rods are slidably connected to the horizontal plate in a vertical direction, a first extrusion spring fixedly installed on the bottom wall of the top ring, the first extrusion spring surrounds the surface of the guide rod and is connected to the horizontal plate.

[0009] As a further solution of the present invention: the positioning assembly includes a vertical groove opened on the side wall of the positioning column, a sliding block is slidably installed in the vertical groove, a second extrusion spring connected to the sliding block is fixedly installed on the bottom wall of the vertical groove, the sliding block extends to the outside of the vertical groove and is rotatably installed with a bearing rod, and the atomizing nozzle is fixedly installed at the bottom end of the bearing rod.

[0010] As a further solution of the present invention: the adjusting assembly includes two groups of brackets fixedly installed on the side walls of the positioning column, and a fixing ring is fixedly installed on the bottom end of the bracket; the side walls of the positioning column are rotatably installed with a guide wheel located above the vertical slot; the side walls of the load-bearing rod are fixedly installed with a first pulling rope, and the end of the first pulling rope away from the load-bearing rod passes through the fixing ring and the guide wheel and then is connected to the sliding block; the sliding block is made of magnetic material, and a magnetic block that cooperates with the sliding block is slidably installed in the vertical slot; the bottom wall of the vertical slot is fixedly installed with a third extrusion spring connected to the magnetic block; the side walls of the positioning column are slidably installed with a control rod along the vertical direction; the side walls of the positioning column are provided with a through hole connected to the bottom end of the vertical slot inwardly, and the bottom wall of the magnetic block is fixedly installed with a second pulling rope, and the end of the second pulling rope away from the magnetic block passes through the through hole to extend to the outside of the positioning column and is connected to the control rod.

[0011] As a further solution of the present invention: a limiting column cooperating with the sliding block is fixedly installed at the bottom end of the vertical groove.

[0012] As a further solution of the present invention: a cushion block is arranged at the bottom end of the control rod.

[0013] As a further solution of the present invention: a positioning ring is fixedly installed on the bottom ends of the two groups of positioning columns.

[0014] Compared with the prior art, the beneficial effects of the present invention are: by setting the positioning component and the adjustment component to cooperate with each other, when the welding head moves downward, the relative position of the atomizing nozzle and the welding head can be conveniently adjusted, the welding point can be automatically sprayed by rotation, and the workpiece can be welded synchronously after spraying, which effectively improves the overall welding efficiency. It solves the problem that the current manual adjustment of the spray component and the relative position of the welding component and the welding point is required in sequence, which has great limitations and leads to low overall welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a selective wave soldering automatic spray device provided in an embodiment of the present invention Figure 1 .

[0016] Figure 2 A schematic diagram of the three-dimensional structure of a selective wave soldering automatic spray device provided in an embodiment of the present invention Figure 2 .

[0017] Figure 3 The present invention is a schematic diagram of a horizontal plate and its connection structure in a selective wave soldering automatic spray device provided in an embodiment of the present invention.

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of A.

[0019] Figure 5 It is a schematic diagram of the main structure of a selective wave soldering automatic spray device provided in an embodiment of the present invention.

[0020] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of B.

[0021] Among them: 1- workbench, 11- support rod, 12- top plate, 2- load plate, 3- welding machine, 31- welding pipe, 32- welding head, 4- lifting assembly, 41- threaded rod, 42- synchronous gear plate, 43- synchronous belt, 44- motor, 5- horizontal plate, 6- guide assembly, 61- bottom ring, 62- top ring, 63- guide rod, 64- first extrusion spring, 7- positioning column, 8- spray assembly, 81- spray storage box, 82- pump, 83- guide tube, 84 - atomizing nozzle, 9- control mechanism, 91- positioning assembly, 911- vertical slot, 912- sliding block, 913- second extrusion spring, 914- bearing rod, 92- adjusting assembly, 921- bracket, 922- fixing ring, 923- guide wheel, 924- first pull rope, 925- controller, 926- magnetic block, 927- third extrusion spring, 928- control rod, 929- second pull rope, 10- limiting column, 13- pad, 14- positioning ring. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0024] like Figure 1 , Figure 2 , Figure 4 , Figure 6As shown, it is a structural diagram of a selective wave soldering automatic spray device provided by an embodiment of the present invention, comprising a workbench 1, wherein support rods 11 are fixedly installed on all sides of the workbench 1, and a top plate 12 is fixedly installed on the top of multiple groups of support rods 11, a bearing plate 2 is arranged between the top plate 12 and the workbench 1, a welding machine 3 is fixedly installed on the surface of the bearing plate 2, a welding pipe 31 distributed vertically downward is fixedly installed on the bottom wall of the bearing plate 2, and a welding head 32 is arranged at the bottom end of the welding pipe 31, a lifting component 4 cooperating with the bearing plate 2 is arranged between the top plate 1 and the workbench 1, and the lifting component 4 is used to control the bearing plate 2 to move in the vertical direction, a cross plate 5 is sleeved on the outer side of the welding pipe 31, and a guide component 6 cooperating with the cross plate 5 is arranged on the side wall of the welding pipe 31, and the guide component 6 is used to control the cross plate 5 to move along the axial direction of the welding pipe 31 on the outer side of the welding pipe 31, two groups of relatively distributed positioning columns 7 are fixedly installed on the bottom wall of the cross plate 5, and the surface of the cross plate 5 is provided with a plurality of positioning columns 7. A spray assembly 8 is provided, and the spray assembly 8 includes two groups of relatively distributed spray storage boxes 81 fixedly installed on the surface of the horizontal plate 5. A pump 82 is provided on the surface of the spray storage box 81. The output end of the pump 82 is connected to a conduit 83, and the end of the conduit 83 away from the pump 82 is connected to an atomizing nozzle 84. A control mechanism 9 that cooperates with the atomizing nozzle 84 is provided on the surface of the positioning column 7. The control mechanism 9 includes a positioning assembly 91 and an adjustment assembly 92. The positioning assembly 91 is located on the surface of the positioning column 7 and is connected to the atomizing nozzle 84. The positioning assembly 91 controls the atomizing nozzle 84 to remain in a vertical downward state on the outside of the positioning column 7 when not spraying. The adjustment assembly 92 is located on the surface of the positioning column 7 and is connected to the positioning assembly 91. When the welding pipe 31 and the welding head 32 move downward, the adjustment assembly 92 controls the atomizing nozzle 84 to rotate toward the welding position to be welded and automatically spray by cooperating with the positioning assembly 91.

[0025] Initially, the positioning component 91 supports and positions the atomizing nozzle 84, and the atomizing nozzle 84 remains in a vertical downward state outside the welding head 32. The workpiece to be welded is placed on the surface of the workbench 1, and the position to be welded is aligned with the welding 32 in the vertical direction. The lifting component 4 controls the supporting plate 2 to move vertically downward, and the supporting plate 2 drives the welding pipe 31 and the cross plate 5 to move downward synchronously. When the welding pipe 31 moves downward, the adjusting component 92 cooperates with the positioning component 91 to synchronously adjust the position of the atomizing nozzle 84, so that the atomizing nozzle 84 rotates toward the position to be welded. After the atomizing nozzle 84 rotates to a suitable angle, the adjusting component 92 controls the pump 82 to start, and the pump 82 transports the spray material in the spray material storage box 81 to the atomizing nozzle 84 through the conduit 83, and the atomizing nozzle 84 atomizes the spray material and sprays it accurately to the position to be welded. The welding tube 31 continues to move downward, at which time the adjustment component 92 releases the restriction on the atomizing nozzle 84, and the positioning component 91 controls the atomizing nozzle 84 to rotate in the opposite direction to the original position. At this time, the welding head 32 at the bottom of the welding tube 31 moves to the surface of the workpiece, and the workpiece surface can be conveniently and accurately welded. During the entire welding process, the guide component 6 can conveniently adjust the relative position of the welding tube 31 and the horizontal plate 5, and the positioning column 7 under the horizontal plate 5 always squeezes and positions the workpiece, which can effectively prevent the position of the workpiece from being offset during welding.

[0026] like Figure 1 , Figure 2 , Figure 5 As shown, as a preferred embodiment of the present invention, the lifting assembly 4 includes a plurality of groups of threaded rods 41 rotatably installed between the top plate 12 and the workbench 1, the threaded rods 41 are threadedly connected to the bearing plate 2, a synchronous gear plate 42 is fixedly installed on the surface of the threaded rods 41, and the plurality of groups of synchronous gear plates 42 are commonly connected to a synchronous belt 43, and the top end of a group of threaded rods 41 extends to the surface of the top plate 12 and is connected to a motor 44.

[0027] When the height of the supporting plate 2 needs to be adjusted, the motor 44 drives a group of threaded rods 41 to rotate and then drives the synchronous gear plate 42 to rotate. Multiple groups of synchronous gear plates 42 cooperate with the synchronous belt 43 to drive multiple groups of threaded rods 41 to rotate synchronously. When the threaded rods 41 rotate, the supporting plate 2 can be conveniently controlled to move in the vertical direction.

[0028] like Figure 1 , Figure 2As shown, as a preferred embodiment of the present invention, the guide assembly 6 includes a bottom ring 61 fixedly installed on the surface of the welding tube 31 and located below the cross plate 5, a top ring 62 fixedly installed on the surface of the welding tube 31 and located above the cross plate 5, a plurality of groups of guide rods 63 are fixedly installed between the bottom ring 61 and the top ring 62, the guide rods 63 are slidably connected to the cross plate 5 in the vertical direction, a first extrusion spring 64 is fixedly installed on the bottom wall of the top ring 62, the first extrusion spring 64 surrounds the surface of the guide rod 63 and is connected to the cross plate 5.

[0029] The supporting plate 2 drives the welding tube 31 and the cross plate 5 to move downward synchronously, and the cross plate 5 drives the positioning column 7 to move downward synchronously. The bottom end of the positioning column 7 first contacts the workpiece on the surface of the workbench 1, and the positioning column 7 squeezes and positions the workpiece, effectively avoiding the displacement of the workpiece position during spray welding. After the positioning column 7 squeezes and positions the workpiece, the supporting plate 2 drives the welding tube 31 to move downward synchronously. At this time, the cross plate 5 slides on the surface of the guide rod 63, so that the relative position of the cross plate 5 and the welding tube 31 can be conveniently adjusted, and the height of the welding head 32 can be conveniently adjusted to weld the workpiece.

[0030] like Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, as a preferred embodiment of the present invention, the positioning assembly 91 includes a vertical groove 911 opened on the side wall of the positioning column 7, a sliding block 912 is slidably installed in the vertical groove 911, a second extrusion spring 913 connected to the sliding block 912 is fixedly installed on the bottom wall of the vertical groove 911, the sliding block 912 extends to the outside of the vertical groove 911 and is rotatably installed with a bearing rod 914, and the atomizing nozzle 84 is fixedly installed at the bottom end of the bearing rod 914.

[0031] Initially, the second extrusion spring 913 applies a thrust to the sliding block 912, the sliding block 912 is at the top of the vertical slot 911, the sliding block 912 supports and positions the bearing rod 914, the bearing rod 914 is in a vertical state and is outside the positioning column 7, the positioning column 7 and the bearing rod 914 drive the atomizing nozzle 84 to move downward synchronously, and when the bearing plate 2 moves downward to a suitable height, the adjusting component 92 controls the sliding block 912 to move downward in the vertical slot 911, and when the sliding block 912 drives the bearing rod 914 to move downward, the adjusting component 92 synchronously controls the The supporting rod 914 applies a lateral pulling force, so that the supporting rod 914 rotates toward the direction of the workpiece to be welded on the surface of the workbench 1. After the supporting rod 914 rotates to a suitable angle, the adjusting component 92 controls the pump 82 to automatically start, and then the spray material is atomized and sprayed out through the atomizing nozzle 84. The supporting plate 2 continues to move downward, and the adjusting component 92 releases the restriction on the sliding block 912 and the supporting rod 914. The sliding block 912 moves to the top of the vertical groove 911 under the elastic thrust of the second extrusion spring 913, and the supporting rod 914 rotates to a vertical state on the outside of the sliding block 912.

[0032] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, as a preferred embodiment of the present invention, the adjustment component 92 includes two groups of brackets 921 fixedly installed on the side walls of the positioning column 7, and a fixing ring 922 is fixedly installed on the bottom end of the bracket 921. The side wall of the positioning column 7 is rotatably installed with a guide wheel 923 located above the vertical groove 911. The side wall of the load-bearing rod 914 is fixedly installed with a first pulling rope 924. The end of the first pulling rope 924 away from the load-bearing rod 914 passes through the fixing ring 922 and the guide wheel 923 and then is connected to the sliding block 912. The sliding block 912 is made of magnetic material, and a pull rod 924 is slidably installed in the vertical groove 911. 2, a third extrusion spring 927 connected to the magnetic block 926 is fixedly installed on the bottom wall of the vertical slot 911, a control rod 928 is slidably installed on the side wall of the positioning column 7 along the vertical direction, a through hole connected to the bottom end of the vertical slot 911 is opened inwardly on the side wall of the positioning column 7, a second pulling rope 929 is fixedly installed on the bottom wall of the magnetic block 926, one end of the second pulling rope 929 away from the magnetic block 926 passes through the through hole and extends to the outside of the positioning column 7 and is connected to the control rod 928, and a controller 925 is fixedly installed on the side wall of the bearing rod 914, and the controller 925 is electrically connected to the pump 82.

[0033] When the carrying plate 2 moves downward, it drives the control rod 928 to move downward synchronously. The bottom end of the control rod 928 first contacts the surface of the workbench 1, and the carrying plate 2 continues to move downward. The control rod 928 moves upward relatively on the outside of the positioning column 7. The control rod 928 cooperates with the second pulling rope 929 to pull the magnetic block 926 to move downward in the vertical groove 911. The magnetic block 926 pulls the sliding block 912 to move downward synchronously in the vertical groove 911 through the magnetic attraction force. When the sliding block 912 moves downward, it cooperates with the first pulling rope 924 to apply a pulling force to the control rod 928 laterally, thereby pulling the carrying rod 914 and the atomizing nozzle 84 to rotate in the direction to be welded. The controller 925 on the surface of the carrying rod 914 contacts the fixing ring 922, and the fixing ring 922 The controller 925 applies pressure, and the controller 925 controls the pump 82 to start. The sliding block 912 continues to squeeze the second squeezing spring 913 when moving downward, and the elastic thrust of the second squeezing spring 913 on the sliding block 912 continues to increase. When the sliding block 912 moves downward in the vertical groove 911 to a certain position, the magnetic attraction force of the magnetic block 926 on the sliding block 912 is less than the thrust of the second squeezing spring 913 on the sliding block 912, and the second squeezing spring 913 pushes the sliding block 912 to move upward. At this time, the magnetic block 926 continues to move downward, and the magnetic block 926 and the sliding block 912 are separated from each other. The bearing rod 914 rotates in the opposite direction to a vertical state, and the controller 925 and the fixing ring 922 are separated from each other. The controller 925 is not under pressure and thus controls the pump 82 to automatically shut down.

[0034] like Figure 5 , Figure 6 As shown, as a preferred embodiment of the present invention, a limiting column 10 that cooperates with the sliding block 912 is fixedly installed at the bottom of the vertical slot 911. When the sliding block 912 moves downward in the vertical slot 911, the limiting column 10 can limit the height of the sliding block 912 moving downward.

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, as a preferred embodiment of the present invention, a cushion block 13 is provided at the bottom end of the control rod 928. The cushion block 13 can protect the workpiece on the surface of the workbench 1 to prevent the bottom end of the control rod 928 from causing damage to the workpiece.

[0036] like Figure 1 , Figure 2 , Figure 3 As shown, as a preferred embodiment of the present invention, a positioning ring 14 is fixedly mounted on the bottom ends of the two groups of positioning columns 7 .

[0037] The working principle of the present invention is: initially, the second extrusion spring 913 applies a thrust to the sliding block 912, the sliding block 912 is at the top of the vertical groove 911, the sliding block 912 supports and positions the bearing rod 914, the bearing rod 914 is in a vertical state and is located on the outside of the positioning column 7, the atomizing nozzle 84 remains in a vertical downward state and is located on the outside of the welding head 32, the workpiece to be welded is placed on the surface of the workbench 1, the position to be welded is aligned with the welding 32 in the vertical direction, the motor 44 drives a group of threaded rods 41 to rotate and then drives the synchronous gear plate 42 to rotate, multiple groups of synchronous gear plates 42 and the synchronous belt 43 cooperate with each other, which can drive multiple groups of threaded rods 41 to rotate synchronously, and the threaded rods 41 can conveniently control the bearing plate 2 to move in the vertical direction when rotating.

[0038] When the carrying plate 2 moves downward, the control rod 928 is driven to move downward synchronously. The bottom end of the control rod 928 first contacts the surface of the workbench 1. The carrying plate 2 continues to move downward. The control rod 928 moves upward relatively on the outside of the positioning column 7. The control rod 928 cooperates with the second pulling rope 929 to pull the magnetic block 926 to move downward in the vertical groove 911. The magnetic block 926 pulls the sliding block 912 to move downward synchronously in the vertical groove 911 through the magnetic attraction force. When the sliding block 912 moves downward, it is in contact with the first The pulling ropes 924 cooperate with each other to apply a pulling force to the supporting rod 914 laterally, thereby pulling the supporting rod 914 and the atomizing nozzle 84 to rotate in the direction to be welded. The controller 925 on the surface of the supporting rod 914 contacts the fixing ring 922, and the fixing ring 922 applies pressure to the controller 925. The controller 925 controls the pump 82 to start, and the pump 82 transports the spray material in the spray material storage box 81 to the atomizing nozzle 84 through the conduit 83. The atomizing nozzle 84 atomizes the spray material and sprays it accurately to the position to be welded. The welding pipe 31 continues to move downward, and the sliding block 912 continues to squeeze the second squeezing spring 913 while moving downward. The elastic thrust of the second squeezing spring 913 on the sliding block 912 continues to increase. When the sliding block 912 moves downward in the vertical groove 911 to a certain position, the magnetic attraction of the magnetic block 926 on the sliding block 912 is less than the thrust of the second squeezing spring 913 on the sliding block 912. The second squeezing spring 913 pushes the sliding block 912 to move upward. At this time, the magnetic block 926 continues to move downward, and the magnetic block 926 and the sliding block 912 are separated from each other. The bearing rod 914 rotates in the opposite direction to a vertical state, and the controller 925 is separated from the fixing ring 922. The controller 925 is not pressurized and thus controls the pump 82 to automatically shut down.

[0039] The welding tube 31 continues to move downward, the bearing rod 914 and the atomizing nozzle 84 rotate in the opposite direction to the original position, and the welding head 32 at the bottom of the welding tube 31 moves to the surface of the workpiece, so that the surface of the workpiece can be accurately welded conveniently. During the entire welding process, the horizontal plate 5 slides on the surface of the guide rod 63, so that the relative position of the horizontal plate 5 and the welding tube 31 can be conveniently adjusted, and the height of the welding head 32 can be conveniently adjusted to weld the workpiece. The positioning column 7 below the horizontal plate 5 always squeezes and positions the workpiece, which can effectively prevent the position of the workpiece from being offset during welding.

[0040] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A selective wave soldering automatic spray device, comprising a workbench, wherein support rods are fixedly installed around the workbench, a top plate is fixedly installed on the top of multiple groups of support rods, a bearing plate is arranged between the top plate and the workbench, a welding machine is fixedly installed on the surface of the bearing plate, a welding pipe distributed vertically downward is fixedly installed on the bottom wall of the bearing plate, and a welding head is arranged at the bottom end of the welding pipe, characterized in that: A lifting assembly that cooperates with the bearing plate is arranged between the top plate and the workbench, and the lifting assembly is used to control the bearing plate to move in the vertical direction. A horizontal plate is sleeved on the outside of the welding pipe, and a guide assembly that cooperates with the horizontal plate is arranged on the side wall of the welding pipe. The guide assembly is used to control the horizontal plate to move along the axis direction of the welding pipe on the outside of the welding pipe. Two groups of relatively distributed positioning columns are fixedly installed on the bottom wall of the horizontal plate, and a spray assembly is arranged on the surface of the horizontal plate. The spray assembly includes two groups of relatively distributed spray storage boxes fixedly installed on the surface of the horizontal plate, and a pump is arranged on the surface of the spray storage box. The output end of the pump is connected to a conduit , an end of the conduit away from the pump is connected to an atomizing nozzle, a control mechanism that cooperates with the atomizing nozzle is arranged on the surface of the positioning column, the control mechanism includes a positioning component and an adjustment component, the positioning component is located on the surface of the positioning column and is connected to the atomizing nozzle, the positioning component controls the atomizing nozzle to remain in a vertical downward state outside the positioning column when not spraying, the positioning component includes a vertical groove opened on the side wall of the positioning column, a sliding block is slidably installed in the vertical groove, a second extrusion spring connected to the sliding block is fixedly installed on the bottom wall of the vertical groove, the sliding block extends to the outside of the vertical groove and is rotatably installed with a load-bearing Rod, the atomizing nozzle is fixedly installed at the bottom end of the bearing rod, the adjusting component is located on the surface of the positioning column and is connected to the positioning component, when the welding pipe and the welding head move downward, the adjusting component controls the atomizing nozzle to rotate toward the welding position to be welded and automatically sprays by cooperating with the positioning component, the adjusting component includes two groups of brackets fixedly installed on the side walls of the positioning column, the bottom ends of the brackets are fixedly installed with a fixing ring, the side walls of the positioning column are rotatably installed with a guide wheel located above the vertical groove, the side walls of the bearing rod are fixedly installed with a first pulling rope, and the first pulling rope is away from one side of the bearing rod. The end passes through the fixing ring and the guide wheel and is then connected to the sliding block, the sliding block is made of magnetic material, a magnetic block cooperating with the sliding block is slidably installed in the vertical groove, a third extrusion spring connected to the magnetic block is fixedly installed on the bottom wall of the vertical groove, a control rod is slidably installed on the side wall of the positioning column along the vertical direction, a through hole connected to the bottom end of the vertical groove is opened inwardly on the side wall of the positioning column, a second pulling rope is fixedly installed on the bottom wall of the magnetic block, one end of the second pulling rope away from the magnetic block passes through the through hole and extends to the outside of the positioning column and is connected to the control rod, and a pad is provided at the bottom end of the control rod.

2. A selective wave soldering automatic spray device according to claim 1, characterized in that: The lifting assembly includes multiple groups of threaded rods rotatably installed between the top plate and the workbench, the threaded rods are threadedly connected to the bearing plate, synchronous gear plates are fixedly installed on the surface of the threaded rods, and the multiple groups of synchronous gear plates are commonly connected to a synchronous belt. The top end of a group of threaded rods extends to the surface of the top plate and is connected to a motor.

3. A selective wave soldering automatic spray device according to claim 1, characterized in that: The guide assembly includes a bottom ring fixedly installed on the surface of the welding tube and located below the horizontal plate, a top ring fixedly installed on the surface of the welding tube and located above the horizontal plate, a plurality of groups of guide rods fixedly installed between the bottom ring and the top ring, the guide rods are slidably connected to the horizontal plate in a vertical direction, a first extrusion spring fixedly installed on the bottom wall of the top ring, the first extrusion spring surrounds the surface of the guide rod and is connected to the horizontal plate.

4. A selective wave soldering automatic spray device according to claim 1, characterized in that: A limiting column cooperating with the sliding block is fixedly installed at the bottom end of the vertical slot.

5. The selective wave soldering automatic spray device according to claim 1, characterized in that: A positioning ring is fixedly mounted on the bottom ends of the two groups of positioning columns.

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