Sputtering-proof SMT welding equipment

Abstract

The present invention discloses an anti-sputtering SMT welding device, which belongs to the technical field of electrical component assembly welding, and includes a sleeve frame, a movable electric cylinder, a connecting column, and a multi-point interval anti-sputtering welding mechanism; wherein the multi-point interval anti-splashing welding mechanism includes a reduction motor, an L-shaped rotating shaft, a rotating ring, a support shaft, a plurality of pulling bars, a plurality of pulling shafts, a sleeve rod, a linkage shaft, a concave block, a pressure plate, a plurality of interval anti-splashing bars, a protective slot frame, and an upward push electric cylinder, and also includes a multi-corner interval anti-splashing welding mechanism and a top covering anti-splashing welding assembly. The present invention has a multi-point interval anti-splashing welding mechanism, which enables each pin to have a separate limited welding space, can realize multi-point interval anti-sputtering welding for each pin, can ensure the assembly welding quality of the circuit board, and greatly improve the welding qualification rate, thereby solving the problem that it is difficult to ensure the assembly welding quality of the circuit board and the welding qualification rate is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrical component assembly welding, and in particular to an anti-sputtering SMT welding device. Background Art

[0002] Printed circuit SMT surface mounting technology plays a vital role in the electronics manufacturing industry, mainly through welding equipment. These equipment are mainly used to accurately and quickly mount various electronic components to the predetermined positions of printed circuit boards, thereby heating the solder paste on the pins, so that the pins are welded, thus completing the assembly of the circuit.

[0003] In the existing public documents, the invention patent of Chinese patent announcement number CN116916642A discloses an SMT soldering device, which mainly places the circuit board inside the placement box, and in the process of driving the placement box to circulate and transport, can automatically seal the upper end of the placement box through the cover plate and connect it with the heating chamber, fill the interior with high-temperature gas for reflow soldering, and then connect it with the cooling chamber to fill it with cold air for cooling, completing the entire soldering process, sealing the whole process, seamless connection, reducing heat loss, and concentrating on blowing hot air into the placement box, heating evenly and efficiently. However, the SMT soldering device still has the following problems.

[0004] During surface mount soldering, the circuit board needs to be placed in a specified position, and solder paste is applied to each pin position of the circuit board, and then the solder paste is heated and brought into contact with the pins to achieve the soldering function. However, during the soldering process, the solder paste at the pin position will splash around due to problems with the solder paste or the processing technology. Sputtering will cause soldering damage to the entire surface mount soldered circuit board. Therefore, it is difficult to achieve multi-point interval anti-sputtering soldering for each pin, and it is difficult to perform interval anti-sputtering soldering on multiple corners of the pin. This makes it difficult to ensure the assembly soldering quality of the circuit board, and the soldering pass rate is greatly reduced. For this reason, an anti-sputtering SMT soldering equipment is needed. Summary of the invention

[0005] To this end, the present invention provides an anti-sputtering SMT welding device to solve the problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-sputtering SMT welding equipment, comprising a sleeve frame, a movable electric cylinder and a connecting column, wherein the movable electric cylinder is fixed on the upper surface of the sleeve frame, the output end of the movable electric cylinder is fixedly connected to the connecting column, and the bottom end of the connecting column is installed with a multi-point interval anti-splashing welding mechanism; the multi-point interval anti-splashing welding mechanism comprises a reduction motor fixedly installed at the bottom end of the connecting column, and the output end of the reduction motor is fixedly connected to an L-shaped rotating shaft, the bottom end of the L-shaped rotating shaft is fixedly connected to a swivel, the internal rotation of the swivel is connected to a support shaft, and the bottom end of the swivel is fixedly connected to multiple pull-type shafts. Moving bar; a plurality of pulling shafts are provided on the outside of the rotating ring, and the pulling shafts are fixedly connected to the pulling bar, the outer wall of the pulling shaft is rotatably connected with a sleeve rod, the inner wall of the sleeve rod is rotatably connected with a linkage shaft at a position away from the pulling shaft, the bottom end of the linkage shaft is fixedly connected with a concave block, and the bottom end of the concave block is fixedly connected with a pressure plate; a plurality of spaced anti-splash strips are fixedly connected to one side of the pressure plate, and a protective groove frame is slidably connected to the outer wall of the spaced anti-splash strips; an upward push electric cylinder is provided on one side of the connecting column, and a multi-corner spaced anti-splash welding mechanism is provided at the output end of the upward push electric cylinder; a top covering anti-splash welding assembly is provided at the bottom end of the support shaft.

[0007] Preferably, the outer wall of the output end of the mobile electric cylinder is slidably connected to the sleeve; the center point of the support shaft and the center point of the connecting column are on the same vertical line, and the cross-sectional shapes of the support shaft and the connecting column are both circular, and the multiple pulling bars are rotatably connected to the support shaft, and the multiple pulling bars are arranged in a circular ring with equal spacing. A circuit substrate is provided inside the protective groove frame, and a plurality of pins are provided between the circuit substrate and the protective groove frame, and the plurality of pins are fixedly connected to the circuit substrate; a positioning groove plate is fixedly connected to the bottom end of the sleeve, and the positioning groove plate is plugged into the pins, and a torque sensor is fixedly installed on the top end of the support shaft, and the sensing end of the torque sensor is fixedly connected to the output end of the reduction motor;

[0008] A support bar is provided on one side of the torque sensor, and the support shaft and the upward push electric cylinder are fixedly connected to the support bar. A controller is connected to one side of the sleeve frame, and the controller is fixedly connected to the sleeve frame.

[0009] When this technology is in use, the reduction motor drives the L-shaped shaft to rotate, the swivel rotates counterclockwise outside the support shaft, the pull bar drives the pull shaft to rotate counterclockwise, the sleeve rod drives the linkage shaft to approach the center point of the sleeve rod, and the concave block drives the pressure plate to approach the center point of the sleeve rod. Multiple spaced splash-proof strips can be inserted into the spaced welding gaps of multiple pins respectively. The spaced splash-proof strips are transmitted to the pressure plate, the linkage shaft is transmitted to the sleeve rod, the pull shaft is transmitted to the swivel, and the swivel is transmitted to the L-shaped shaft. When the torque value sensed by the torque sensor is the same as the torque value set by the controller, the reduction motor is turned off by the controller.

[0010] Preferably, the multi-corner interval splashproof welding mechanism includes a corner pressure sensor fixedly arranged at the output end of the push-up electric cylinder; the sensing end of the corner pressure sensor is fixedly connected to a groove ring, and the groove ring is slidably connected to a connecting column, the outer wall of the groove ring is fixedly connected to a plurality of connecting shafts, and the outer wall of each connecting shaft is rotatably connected to a sleeve rod; the inner wall of the sleeve rod is rotatably connected to a pulling shaft at a position away from the connecting shaft, and a hinge plate is fixedly connected to one end of the pulling shaft, one side of the hinge plate is fixedly connected to a corner splashproof block, and the outer wall of the hinge plate is fixedly connected to a sleeve block on an adjacent side of the sleeve block; the inner wall of the sleeve block is slidably connected to a sliding column, the sliding column is fixedly connected to a protective groove frame, a corner groove is provided on one side of the corner splashproof block, the corner splashproof block is slidably connected to the protective groove frame to which the corner groove belongs, the connecting column is fixedly connected to the push-up electric cylinder, and a plurality of connecting shafts are arranged equidistantly in a circular ring.

[0011] When this technology is in use, the upward push electric cylinder pushes the corner pressure sensor upward, the corner pressure sensor drives the groove ring upward, the groove ring drives multiple connecting shafts to move upward synchronously, the groove ring drives multiple connecting shafts to move upward synchronously, the bottom end of the sleeve rod drives the pulling axis to approach the center point of the connecting column, the hinged plate makes the corner splash block approach the center point of the connecting column, the sleeve block slides along the outer wall of the sliding column, and at the same time, the corner splash block is inserted into the corner position of the circuit board on the upper surface of the circuit substrate at intervals, and multiple corner splash blocks are spaced and splash-proofed at multiple corner positions of the circuit board on the upper surface of the circuit substrate. When the pressure value sensed by the corner pressure sensor is the same as the pressure value set by the controller, the upward push electric cylinder is closed by the controller.

[0012] Preferably, the top covering splash-proof welding assembly includes a bracket fixedly arranged at the bottom end of the support shaft; the bracket is fixedly connected to the protective groove frame, the inner wall of the bracket is slidably connected with a sliding shaft, and the bottom end of the sliding shaft is fixedly connected with a resistance heating strip, and the lower surface of the resistance heating strip is fixedly installed with a splash-proof spacer; one side of the sliding shaft is provided with a positioning pressure sensor fixedly connected to the resistance heating strip, and the sensing end of the positioning pressure sensor is fixedly connected with an extrusion column, and the top of the extrusion column is fixedly installed with a positioning electric cylinder, the outer wall of the extrusion column is slidably connected to the bracket, and the positioning electric cylinder is fixedly connected to the bracket. The resistance heating strip and the splash-proof spacer are both slidably connected to the bracket, and the resistance heating strip is used to heat the splash-proof spacer.

[0013] When this technology is in use, the positioning electric cylinder pushes the extrusion column downward, the extrusion column drives the positioning pressure sensor downward, the resistance heating strip causes the splash-proof strip to move downward, and the sliding shaft can slide down along the inner wall of the bracket, so that the splash-proof strip can cover the upper surface position of multiple pins, so that the resistance heating strip heats the splash-proof strip, allowing the splash-proof strip to quickly heat and melt the solder paste on multiple pins for welding.

[0014] The present invention has the following advantages:

[0015] 1. The present invention uses a multi-point interval anti-splash welding mechanism, a reduction motor drives the L-shaped shaft to rotate, the L-shaped shaft drives the rotating ring to rotate counterclockwise, the rotating ring drives multiple pulling bars to rotate counterclockwise, the pulling bar drives the pulling shaft to rotate counterclockwise, the pulling shaft pulls the sleeve rod, the sleeve rod drives the linkage shaft to approach the center point of the sleeve rod, the concave block drives the pressure plate to approach the center point of the sleeve rod, and multiple interval anti-splash bars can be respectively inserted into the interval welding gaps of multiple pins. When the torque force value sensed by the torque force sensor is the same as the torque force value set by the controller, the multiple interval anti-splash bars can perform multi-point interval anti-splash limiting on multiple pins according to the specified torque force. In this way, when the solder paste on multiple pins is heated and welded, each pin can have a separate limit welding space, and multi-point interval anti-splash welding can be achieved for each pin, which can ensure the assembly welding quality of the circuit board and greatly improve the welding qualification rate;

[0016] 2. The present invention utilizes a multi-corner interval splash-proof welding mechanism. The upward push electric cylinder pushes the corner pressure sensor upward, and the groove ring drives multiple connecting shafts to move upward synchronously. The groove ring will slide up along the outer wall of the connecting column, and the connecting shaft drives the top of the sleeve rod to move upward. The pulling shaft drives the hinge plate to approach the center point of the connecting column, and the hinge plate drives the sleeve block to approach the center point of the connecting column. Multiple corner splash-proof blocks perform interval splash-proof limiting on multiple corner positions of the circuit board on the upper surface of the circuit substrate, and multiple pins at the corner positions can perform side interval splash-proof welding to ensure that each pin has a separate limit welding space, which can ensure the assembly welding quality of the circuit board.

[0017] 3. The present invention covers the splash-proof welding assembly on the top, and the positioning electric cylinder pushes the extrusion column downward, and the extrusion column slides down along the inner wall of the bracket. The positioning pressure sensor drives the resistance heating strip downward, and the resistance heating strip drives the sliding shaft downward, so that the sliding shaft can slide down along the inner wall of the bracket, and the splash-proof spacer can cover the upper surface position of multiple pins. The resistance heating strip heats the splash-proof spacer, so that the splash-proof spacer can quickly heat and melt the solder paste on the multiple pins for welding. In this way, the tops of the multiple pins are limited and spaced for welding to avoid sputtering during the welding process, ensure that each pin has a separate limited welding space, and ensure the assembly welding quality of the circuit board.

[0018] According to the mutual influence of the above-mentioned multiple effects, firstly, multiple spaced anti-splash strips can be respectively inserted into the spaced welding gaps of multiple pins, and secondly, multiple corner anti-splash blocks are used to perform spaced anti-splash limiting on multiple corner positions of the circuit board on the upper surface of the circuit substrate, and finally, the anti-splash spacers can cover the upper surface positions of multiple pins. In summary, each pin can have a separate limited welding space, and multi-point spaced anti-splash welding can be achieved for each pin, as well as spaced anti-splash welding for the pins at the corner positions, which can ensure the assembly welding quality of the circuit board and greatly improve the welding qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 This is a schematic diagram of the main structure of the anti-sputtering SMT welding equipment of the present invention;

[0022] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0023] Figure 3 This is a schematic diagram of a partial structure of the connection between the pull bar and the pull shaft of the present invention;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the anti-sputtering SMT welding equipment of the present invention;

[0025] Figure 5 It is a schematic diagram of the partial structure of the main view of the connection between the sleeve frame and the controller of the present invention;

[0026] Figure 6 It is a schematic diagram of a partial structure of the connection between the movable electric cylinder and the connecting column of the present invention;

[0027] Figure 7 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0028] Figure 8 It is a schematic diagram of a partial structure of a vertical section of the connection between the bracket and the protective slot frame of the present invention;

[0029] Fig. 9 This is a schematic diagram of the main structure of the top covering splash-proof welding assembly of the present invention;

[0030] In the figure: 1, sleeve frame; 2, mobile electric cylinder; 3, connecting column; 4, reduction motor; 5, L-shaped shaft; 6, swivel; 7, support shaft; 8, pulling bar; 9, pulling shaft; 10, sleeve rod; 11, linkage shaft; 12, concave block; 13, pressure plate; 14, interval splash bar; 15, protection slot frame; 16, circuit board; 17, positioning slot plate; 18, pin; 19, support bar; 20, controller; 21, push-up electric cylinder ; 22. Corner pressure sensor; 23. Groove ring; 24. Connecting shaft; 25. Sleeve rod; 26. Pull shaft; 27. Hinge plate; 28. Corner splash block; 29. ​​Sleeve block; 30. Sliding column; 31. Corner groove; 32. Bracket; 33. Sliding shaft; 34. Resistance heating strip; 35. Splashproof strip; 36. Positioning pressure sensor; 37. Extrusion column; 38. Positioning electric cylinder; 39. Torque sensor. DETAILED DESCRIPTION

[0031] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] As attached Figure 1-9 An anti-sputtering SMT welding device is shown, and the anti-sputtering SMT welding device is provided with a multi-point interval anti-sputtering welding mechanism, a multi-corner interval anti-sputtering welding mechanism, and a top covering anti-sputtering welding component. The arrangement of each mechanism and component can enable each pin 18 to have a separate limited welding space, and can realize multi-point interval anti-sputtering welding for each pin 18, as well as interval anti-sputtering welding for the pins 18 at the corner position, which can ensure the assembly welding quality of the circuit board and greatly improve the welding qualification rate. The specific structural arrangement of each mechanism and component is as follows.

[0033] In this technical solution, as shown in the attached Figure 1-4As shown, the mobile electric cylinder 2 is fixed on the upper surface of the sleeve frame 1, and the output end of the mobile electric cylinder 2 is fixedly connected to the connecting column 3, and the bottom end of the connecting column 3 is installed with a multi-point interval splash-proof welding mechanism; the multi-point interval splash-proof welding mechanism includes a reduction motor 4 fixedly installed at the bottom end of the connecting column 3, and the output end of the reduction motor 4 is fixedly connected to an L-shaped rotating shaft 5, the bottom end of the L-shaped rotating shaft 5 is fixedly connected to a swivel 6, the internal rotation of the swivel 6 is connected to a support shaft 7, and the bottom end of the swivel 6 is fixedly connected to a plurality of pulling bars 8.

[0034] A plurality of pulling shafts 9 are provided on the outside of the swivel 6, and the pulling shafts 9 are fixedly connected to the pulling bar 8, a sleeve rod 10 is rotatably connected to the outer wall of the pulling shaft 9, a linkage shaft 11 is rotatably connected to the inner wall of the sleeve rod 10 and at a position away from the pulling shaft 9, a concave block 12 is fixedly connected to the bottom end of the linkage shaft 11, and a pressure plate 13 is fixedly connected to the bottom end of the concave block 12; a plurality of spaced anti-splash strips 14 are fixedly connected to one side of the pressure plate 13, and a protective groove frame 15 is slidably connected to the outer wall of the spaced anti-splash strips 14; an upward push electric cylinder 21 is provided on one side of the connecting column 3, and a multi-corner spaced anti-splash welding mechanism is provided at the output end of the upward push electric cylinder 21; a top covering anti-splash welding assembly is provided at the bottom end of the support shaft 7.

[0035] In this technical solution, as shown in the attached Figure 1-5 As shown, a circuit substrate 16 is provided inside the protective groove frame 15, and a plurality of pins 18 are provided between the circuit substrate 16 and the protective groove frame 15, and the plurality of pins 18 are fixedly connected to the circuit substrate 16; a positioning groove plate 17 is fixedly connected to the bottom end of the sleeve 1, and the positioning groove plate 17 is plugged into the pins 18, so that all the plurality of pins 18 on the circuit substrate 16 can be coated with solder paste, and then the circuit substrate 16 is inserted into the interior of the positioning groove plate 17 to realize the positioning operation of the circuit substrate 16.

[0036] A torque sensor 39 is fixedly installed at the top of the support shaft 7, and the sensing end of the torque sensor 39 is fixedly connected to the output end of the reduction motor 4, so that the torque value of the rotation of the L-shaped shaft 5 can be sensed by the torque sensor 39. When the torque value sensed by the torque sensor 39 is the same as the torque value set by the controller 20, the reduction motor 4 is turned off by the controller 20. A support bar 19 is provided on one side of the torque sensor 39, and the support shaft 7 and the upward push electric cylinder 21 are fixedly connected to the support bar 19, so that the connecting column 3 drives the upward push electric cylinder 21 to move the support bar 19 downward, so that the support bar 19 forms a linkage downward movement.

[0037] A controller 20 is connected to one side of the sleeve frame 1 , and the controller 20 and the sleeve frame 1 are fixedly connected, so that the mobile electric cylinder 2 is started by the controller 20 , and the mobile electric cylinder 2 drives the connecting column 3 to move downward, thereby realizing stable downward movement of the connecting column 3 .

[0038] In this technical solution, as shown in the attached Figure 6-7As shown, the multi-corner interval splash-proof welding mechanism includes a corner pressure sensor 22 fixedly arranged at the output end of the push-up electric cylinder 21; the sensing end of the corner pressure sensor 22 is fixedly connected to a groove ring 23, and the groove ring 23 is slidingly connected to the connecting column 3, the outer wall of the groove ring 23 is fixedly connected to a plurality of connecting shafts 24, and the outer wall of each connecting shaft 24 is rotatably connected to a sleeve rod 25. A pulling shaft 26 is rotatably connected to the inner wall of the sleeve rod 25 at a position away from the connecting shaft 24, and a hinge plate 27 is fixedly connected to one end of the pulling shaft 26. A corner splash block 28 is fixedly connected to one side of the hinge plate 27, and a sleeve block 29 is fixedly connected to the outer wall of the hinge plate 27 and located on the adjacent side of the sleeve block 29; a sliding column 30 is slidably connected to the inner wall of the sleeve block 29, and the sliding column 30 is fixedly connected to the protective groove frame 15. A corner groove 31 is provided on one side of the corner splash block 28, and the corner splash block 28 is slidably connected to the protective groove frame 15 to which the corner groove 31 belongs, and the connecting column 3 is fixedly connected to the upward push electric cylinder 21, and multiple connecting shafts 24 are arranged in a circular ring with equal spacing.

[0039] In this technical solution, as shown in the attached Figure 8-9 As shown, the top covering splash-proof welding assembly includes a bracket 32 ​​fixedly arranged at the bottom end of the support shaft 7; the bracket 32 ​​is fixedly connected to the protective slot frame 15, the inner wall of the bracket 32 ​​is slidably connected with a sliding shaft 33, and the bottom end of the sliding shaft 33 is fixedly connected with a resistance heating strip 34, and the lower surface of the resistance heating strip 34 is fixedly installed with a splash-proof spacer 35; one side of the sliding shaft 33 is provided with a positioning pressure sensor 36 fixedly connected to the resistance heating strip 34, and the sensing end of the positioning pressure sensor 36 is fixedly connected with an extrusion column 37, and the top of the extrusion column 37 is fixedly installed with a positioning electric cylinder 38, the outer wall of the extrusion column 37 is slidably connected to the bracket 32, and the positioning electric cylinder 38 is fixedly connected to the bracket 32. The resistance heating strip 34 and the splash-proof spacer 35 are both slidably connected to the bracket 32, and the resistance heating strip 34 is used to heat the splash-proof spacer 35.

[0040] The use process of the anti-sputtering SMT welding equipment of the present invention is as follows:

[0041] Step 1: During installation and placement, all the pins 18 on the circuit substrate 16 are coated with solder paste, and then the circuit substrate 16 is inserted into the positioning slot plate 17, and the moving electric cylinder 2 is started by the controller 20, and the moving electric cylinder 2 drives the connecting column 3 to move downward. The connecting column 3 drives the upward push electric cylinder 21 to move the support bar 19 downward, the support bar 19 drives the support shaft 7 downward, the support shaft 7 drives the bracket 32 ​​downward, and the bracket 32 ​​drives the protective slot frame 15 downward, so that the protective slot frame 15 can be positioned outside the multiple pins 18.

[0042] Step 2: During multi-point interval anti-splash welding, the controller 20 is used to start the reduction motor 4, which drives the L-shaped shaft 5 to rotate, and the L-shaped shaft 5 drives the swivel 6 to rotate counterclockwise, and the swivel 6 rotates counterclockwise outside the support shaft 7, and the swivel 6 drives multiple pull bars 8 to rotate counterclockwise, and the pull bar 8 drives the pull shaft 9 to rotate counterclockwise, and the pull shaft 9 pulls the sleeve rod 10, and the sleeve rod 10 drives the linkage shaft 11 to approach the center point of the sleeve rod 10, and the linkage shaft 11 drives the concave block 12 to approach the center point of the sleeve rod 10. The concave block 12 drives the pressure plate 13 to approach the center point of the sleeve rod 10, and the pressure plate 13 makes the multiple interval anti-splash bars 14 approach the center point of the sleeve rod 10. The multiple interval anti-splash bars 14 can be respectively inserted into the interval welding gaps of the multiple pins 18.

[0043] At the same time, when the spacer splash-proof strips 14 are pressed on the side of the circuit board on the circuit substrate 16, the spacer splash-proof strips 14 will generate an extrusion force, and the spacer splash-proof strips 14 will be transmitted to the pressure plate 13, and the pressure plate 13 will be transmitted to the linkage shaft 11 through the concave block 12, and the linkage shaft 11 will be transmitted to the sleeve rod 10, and the sleeve rod 10 will be transmitted to the pull shaft 9, and the pull shaft 9 will be transmitted to the rotating ring 6, and the rotating ring 6 will be transmitted to the L-shaped rotating shaft 5. The torque value of the rotation of the L-shaped rotating shaft 5 can be sensed by the torque sensor 39. When the torque value sensed by the torque sensor 39 is the same as the torque value set by the controller 20, the reduction motor 4 is turned off by the controller 20, and the multiple spacer splash-proof strips 14 can perform multi-point spacer splash-proof limit on the multiple pins 18 according to the specified torque.

[0044] Step three, during multi-corner interval splash-proof welding, the controller 20 starts the upward push electric cylinder 21, and the upward push electric cylinder 21 pushes the corner pressure sensor 22 upward, and the corner pressure sensor 22 drives the groove ring 23 upward, and the groove ring 23 drives multiple connecting shafts 24 to move upward synchronously, and the groove ring 23 will slide up along the outer wall of the connecting column 3, and the groove ring 23 drives multiple connecting shafts 24 to move upward synchronously, and the connecting shaft 24 drives the top end of the sleeve rod 25 to move upward, and the bottom end of the sleeve rod 25 drives the pulling shaft 26 to approach the center point of the connecting column 3, and the pulling shaft 26 drives the hinge plate 27 to approach the center point of the connecting column 3, and the hinge plate 27 makes the corner splash-proof block 28 approach the center point of the connecting column 3, and the hinge plate 27 drives the sleeve block 29 to approach the center point of the connecting column 3, and the sleeve block 29 slides along the outer wall of the sliding column 30, and the corner splash-proof block 28 is inserted into the corner groove 31. At the same time, the corner splash-proof blocks 28 are inserted into the corner positions of the circuit board on the upper surface of the circuit substrate 16 at intervals, and multiple corner splash-proof blocks 28 are inserted into multiple corner positions of the circuit board on the upper surface of the circuit substrate 16 to perform splash-proof limiting at intervals.

[0045] When the pressure value sensed by the corner pressure sensor 22 is the same as the pressure value set by the controller 20, the controller 20 closes the push-up electric cylinder 21, so that multiple corner splash-proof blocks 28 can perform multi-corner interval splash-proof limiting on the circuit board on the circuit substrate 16 according to the specified pressure.

[0046] Step 4: When the top is covered with splash-proof welding, the positioning electric cylinder 38 is started by the controller 20, and the positioning electric cylinder 38 pushes the extrusion column 37 downward, and the extrusion column 37 slides down along the inner wall of the bracket 32. At the same time, the extrusion column 37 drives the positioning pressure sensor 36 to move downward, and the positioning pressure sensor 36 drives the resistance heating strip 34 to move downward, and the resistance heating strip 34 makes the splash-proof spacer 35 move downward, and the resistance heating strip 34 drives the sliding shaft 33 to move downward. In this way, the sliding shaft 33 can slide down along the inner wall of the bracket 32, so that the splash-proof spacer 35 can cover the upper surface position of multiple pins 18, turn on the resistance heating strip 34, so that the resistance heating strip 34 heats the splash-proof spacer 35, and quickly enables the splash-proof spacer 35 to heat and melt the solder paste on multiple pins 18. Then, after turning off the resistance heating strip 34, each pin 18 can be quickly welded in an independent limited space. After welding, the temperature is lowered to complete the surface mount welding, so that the solder paste on the pin 18 cannot sputter to other positions during welding, thereby greatly improving the qualified rate of the surface mount welding of the circuit substrate 16.

[0047] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0048] The present invention has been described in detail above by general description and specific embodiments, but it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An anti-sputtering SMT welding device, comprising a sleeve frame (1), a movable electric cylinder (2) and a connecting column (3), wherein the movable electric cylinder (2) is fixed on the upper surface of the sleeve frame (1), and the output end of the movable electric cylinder (2) is fixedly connected to the connecting column (3), characterized in that: The bottom end of the connecting column (3) is provided with a multi-point interval splash-proof welding mechanism; The multi-point interval anti-splash welding mechanism comprises a reduction motor (4) fixedly mounted at the bottom end of the connecting column (3), and the output end of the reduction motor (4) is fixedly connected to an L-shaped rotating shaft (5), the bottom end of the L-shaped rotating shaft (5) is fixedly connected to a rotating ring (6), the interior of the rotating ring (6) is rotatably connected to a support shaft (7), and the bottom end of the rotating ring (6) is fixedly connected to a plurality of pulling bars (8); A plurality of pull shafts (9) are provided on the outside of the rotating ring (6), and the pull shafts (9) are fixedly connected to the pull bar (8); a sleeve rod (10) is rotatably connected to the outer wall of the pull shaft (9); a linkage shaft (11) is rotatably connected to the inner wall of the sleeve rod (10) at a position away from the pull shaft (9); a concave block (12) is fixedly connected to the bottom end of the linkage shaft (11); and a pressure plate (13) is fixedly connected to the bottom end of the concave block (12); A plurality of spaced anti-splash strips (14) are fixedly connected to one side of the pressure plate (13), and a protective groove frame (15) is slidably connected to the outer wall of the spaced anti-splash strips (14); A push-up electric cylinder (21) is provided on one side of the connecting column (3); a plurality of the pulling bars (8) are rotatably connected to the support shaft (7); the plurality of the pulling bars (8) are arranged in a circular ring with equal spacing; a circuit substrate (16) is provided inside the protective groove frame (15); a plurality of pins (18) are provided between the circuit substrate (16) and the protective groove frame (15); the plurality of pins (18) are fixedly connected to the circuit substrate (16); a positioning groove plate (17) is fixedly connected to the bottom end of the sleeve frame (1), and the positioning groove plate (17) is connected to the pins. The support shaft (7) is inserted between the legs (18), a torque sensor (39) is fixedly installed on the top of the support shaft (7), and the sensing end of the torque sensor (39) is fixedly connected to the output end of the reduction motor (4); a support bar (19) is provided on one side of the torque sensor (39), and the support shaft (7) and the upward push electric cylinder (21) are both fixedly connected to the support bar (19); a controller (20) is connected to one side of the sleeve frame (1), and the controller (20) is fixedly connected to the sleeve frame (1); the output end of the upward push electric cylinder (21) is provided with a multi-corner spacer The invention relates to a splashproof welding mechanism; a top covering splashproof welding assembly is provided at the bottom end of the support shaft (7), and the top covering splashproof welding assembly comprises a bracket (32) fixedly arranged at the bottom end of the support shaft (7); the bracket (32) is fixedly connected to the protection slot frame (15); the inner wall of the bracket (32) is slidably connected to a sliding shaft (33), and the bottom end of the sliding shaft (33) is fixedly connected to a resistance heating strip (34), and the lower surface of the resistance heating strip (34) is fixedly installed with a splashproof partition strip (35); one side of the sliding shaft (33) is provided with a resistance heating strip (34) A positioning pressure sensor (36) is fixedly connected to the heating strip (34), and a sensing end of the positioning pressure sensor (36) is fixedly connected to an extrusion column (37), a positioning electric cylinder (38) is fixedly installed on the top of the extrusion column (37), an outer wall of the extrusion column (37) is slidably connected to a bracket (32), and the positioning electric cylinder (38) is fixedly connected to the bracket (32), the resistance heating strip (34) and the anti-splashing strip (35) are both slidably connected to the bracket (32), and the resistance heating strip (34) is used to heat the anti-splashing strip (35).

2. The anti-sputtering SMT welding equipment according to claim 1, characterized in that: The outer wall of the output end of the movable electric cylinder (2) is slidably connected to the sleeve frame (1); The center point of the support shaft (7) and the center point of the connecting column (3) are located on the same vertical line, and the cross-sectional shapes of the support shaft (7) and the connecting column (3) are both circular.

3. The anti-sputtering SMT welding equipment according to claim 1, characterized in that: The multi-corner interval splash-proof welding mechanism comprises a corner pressure sensor (22) fixedly arranged at the output end of the upward push electric cylinder (21); The sensing end of the corner pressure sensor (22) is fixedly connected to a groove ring (23), and the groove ring (23) is slidably connected to the connecting column (3); the outer wall of the groove ring (23) is fixedly connected to a plurality of connecting shafts (24), and the outer wall of each connecting shaft (24) is rotatably connected to a sleeve rod (25); A pulling shaft (26) is rotatably connected to the inner wall of the sleeve rod (25) at a position away from the connecting shaft (24); a hinge plate (27) is fixedly connected to one end of the pulling shaft (26); a corner splash block (28) is fixedly connected to one side of the hinge plate (27); and a sleeve block (29) is fixedly connected to the outer wall of the hinge plate (27) at a side adjacent to the sleeve block (29); A sliding column (30) is slidably connected to the inner wall of the sleeve block (29), and the sliding column (30) is fixedly connected to the protective slot frame (15). A corner slot (31) is formed on one side of the corner splash block (28), and the corner splash block (28) is slidably connected to the protective slot frame (15) to which the corner slot (31) belongs.

4. The anti-sputtering SMT welding equipment according to claim 3, characterized in that: The connecting column (3) is fixedly connected to the upward electric cylinder (21), and a plurality of connecting shafts (24) are arranged in a circular ring at equal intervals.

Images