Energy-saving peak welding preheating device

Abstract

The present application relates to the technical fields of wave-soldering preheating, in particular to an energy-saving wave-soldering preheating device. The device comprises a supporting base, and a hot air manufacturing assembly is arranged on the surface of the supporting base. The hot air manufacturing assembly is used to generate heat inside the supporting base and convert the heat into hot air. A wind power guiding assembly is arranged inside the supporting base, which is used to limit the frequency of heat and external cold air contact. The distance between the two bearing seats is kept consistent with the length of the electronic board through a ball screw, so that the wind power discharged from the supporting base must first contact the bottom of the electronic board before being discharged. At the same time, the closed plate will move towards the electronic board when being impacted. The wind power is guided by the bearing seat during the flow process and moves towards the ventilation plate. The wind power flows out of the ventilation plate and heats the electronic board together, avoiding the wind power from being in contact with the external environment in a large area during the flow process, which leads to the wind power not blowing directly to the bottom of the electronic board, and avoiding energy waste.

Description

Technical Field

[0001] This invention relates to the field of wave soldering preheating technology, and more specifically, to an energy-saving wave soldering preheating device. Background Technology

[0002] Currently, in wave soldering technology, workpieces such as circuit boards with surface-mount electronic components that are waiting to be soldered need to be preheated. Therefore, wave soldering machines are equipped with preheating devices.

[0003] There are many existing technologies for wave soldering preheating, such as: Chinese Patent Publication No. CN201824037U discloses a preheating device for a wave soldering machine, including a preheating box. The preheating box is concave, and the top of the two side walls of the concave opening in the middle of the top surface of the preheating box are respectively provided with a first air outlet and a second air outlet. The preheating device also includes: a heating tube disposed in the concave opening in the middle of the top surface of the preheating box; a protective plate covering the heating tube; a circulating air duct connecting the inside and outside of the preheating box, the circulating air duct being formed by sequentially connecting the internal space of the preheating box, the first air outlet, the gap between the protective plate and the workpiece to be preheated, and the second air outlet; and an impeller. The preheating device of this invention for a wave soldering machine utilizes at least one heating tube disposed in a closed structure for preheating and an impeller that causes the gas in the preheating box to circulate around the sealed structure and blow laterally over the workpiece to be preheated, so that the workpiece to be preheated is preheated rapidly and the heat is evenly distributed.

[0004] Therefore, it can be seen that when wave soldering machines preheat electronic boards, they use airflow from the side to heat the bottom of the electronic board. However, when airflow is blown from the side, the volume gradually increases as the airflow moves. At the same time, the thickness of the electronic board is relatively low, which means that the airflow cannot fully contact the electronic board, resulting in wasted airflow. If the airflow is not guided, the heat received by each part of the electronic board will be different, resulting in uneven heating of the electronic board and easy damage. Furthermore, when guiding wind, the airflow will cause heat loss, affecting the heating efficiency of the electronic board. Forcibly increasing the temperature of the heating wire will result in a significant waste of energy, and overheating inside the welding machine will damage components, which is not conducive to production.

[0005] In view of this, the present invention provides an energy-saving wave soldering preheating device. Summary of the Invention

[0006] The purpose of this invention is to provide an energy-saving wave soldering preheating device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention aims to provide an energy-saving wave soldering preheating device.

[0008] The system includes a support base, the surface of which is provided with a hot air generating component, which is used to generate heat inside the support base and convert the heat into hot air for blowing. The support base is equipped with a wind guiding component, which is used to limit the frequency of heat contact with the outside cold air, so that the heat is concentrated inside the support base. At the same time, it guides the wind flow through multiple paths, so that when the wind flows through different paths to the end of the path, the wind in different directions will collide with each other, forming an upward wind that contacts the bottom of the circuit board. In this process, the wind maintains its heat through aluminum heat dissipation during the flow.

[0009] As a further improvement to this technical solution, the hot air manufacturing component includes two rotating wheels, both of which are installed inside the support base, and both of the rotating wheels have connecting blocks at their bottoms.

[0010] As a further improvement to this technical solution, conveyor belts are meshed on the surfaces of both connecting blocks, and a first motor is provided at the bottom of the connecting block. The first motor is used to drive the connecting block to rotate. The first motor is installed inside the welding machine and can be disassembled from the connecting block. A heating tube is installed inside the support base.

[0011] As a further improvement to this technical solution, the wind guiding component includes a diversion plate, which is installed inside a support base. Several aluminum blocks are installed inside the support base, and a ventilation plate is provided inside the support base.

[0012] As a further improvement to this technical solution, a closed plate is rotatably connected inside the support base, and a first torsion spring is connected to the other end of the closed plate. The other end of the first torsion spring is connected to the support base. Under normal conditions, the closed plate and the support base are parallel by the elastic force generated by the first torsion spring.

[0013] As a further improvement to this technical solution, a ball screw is rotatably connected inside the support base, and two bearing seats are threadedly connected to the surface of the ball screw. The thread grooves of the two bearing seats are in opposite directions. When the ball screw rotates, the two bearing seats will move in opposite directions. A second motor for driving the ball screw to rotate is installed inside the support base.

[0014] As a further improvement to this technical solution, the surface of the support base is provided with a wind direction control component. The wind direction control component is used to intercept the wind force after it hits the circuit board, so that the residual heat of the wind force dissipates next to the circuit board, thereby achieving auxiliary heating of the circuit board.

[0015] As a further improvement to this technical solution, the wind direction control component includes a wind deflector, which is rotatably connected to a bearing seat. A second torsion spring is connected to the surface of the wind deflector, and the other end of the second torsion spring is connected to the bearing seat. An extension plate is slidably connected inside the wind deflector.

[0016] As a further improvement to this technical solution, the surface of the wind deflector is provided with bolts, the extension plate is fixed to the surface of the wind deflector by bolts, the surface of the support base is provided with a fixing plate, and the fixing plate is provided with a toothed groove inside.

[0017] As a further improvement to this technical solution, a support plate is slidably connected to the surface of the fixed plate, and a gear is rotatably connected to the bottom of the support plate. The gear meshes with the tooth groove, and a third motor is provided on the surface of the support plate to drive the gear to rotate. The rotation of the gear drives the support plate to move laterally, and the movement of the support plate will limit the rotation angle of the windshield.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this energy-saving wave soldering preheating device, the distance between the two bearing seats is kept consistent with the length of the electronic board by a ball screw. This ensures that the airflow from the support base must first contact the bottom of the electronic board before it can be discharged. At the same time, the sealing plate will move towards the electronic board when impacted. During the flow, the airflow is guided by the bearing seats and moves towards the ventilation plate. The airflow from the ventilation plate heats the electronic board together with the airflow from the ventilation plate. This avoids the airflow coming into contact with the outside environment over a large area during the flow, which would prevent the airflow from blowing directly on the bottom of the electronic board and avoid energy waste.

[0019] 2. In this energy-saving wave soldering preheating device, the aluminum block has thermal conductivity and absorbs the heat emitted by the rotating wheel. Then, during the heat dissipation process, the heat is absorbed by the wind force during the movement, so that the wind force can replenish the heat in time during the movement, ensuring the heating effect on the contact electronic board.

[0020] 3. In this energy-saving wave soldering preheating device, when the wind blows the baffle plate to rotate, the second torsion spring generates elastic force to push the baffle plate back to its original position, so that the baffle plate continuously blocks the flowing wind. After the wind comes into contact with the electronic board and disperses, it is intercepted by the baffle plate and the extension plate, so that the heat is dissipated at the bottom of the electronic board, improving the heating efficiency of the electronic board and preventing the heat from dissipating too far away from the electronic board, thus improving the energy-saving effect of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of wind direction flow according to the present invention; Figure 3This is a schematic diagram of the conveyor belt structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the bearing housing structure of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure at point B; Figure 7 This is a schematic diagram of the ventilation panel structure of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the structure at point C.

[0022] The meanings of the labels in the diagram are as follows: 11. Support base; 20. Hot air manufacturing assembly; 21. Rotary wheel; 22. Connecting block; 23. Conveyor belt; 24. First motor; 25. Heating tube; 30. Wind-driven guiding assembly; 31. Drainage plate; 32. Aluminum block; 33. Ventilation plate; 34. Enclosure plate; 35. First torsion spring; 36. Ball screw; 37. Bearing housing; 38. Second motor; 40. Wind direction control assembly; 41. Wind deflector; 42. Second torsion spring; 43. Extension plate; 44. Bolt; 45. Fixing plate; 46. Gear; 47. Support plate; 48. Third motor; 49. Gear. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In wave soldering technology, workpieces such as circuit boards with surface-mount electronic components that are waiting to be soldered need to be preheated. Therefore, wave soldering machines are equipped with preheating devices.

[0027] Please see Figures 1-8 As shown, the purpose of this embodiment is to provide an energy-saving wave soldering preheating device, including a support base 11, a hot air generating component 20 on the surface of the support base 11, the hot air generating component 20 being used to generate heat inside the support base 11 and convert the heat into hot air for blowing. The support base 11 is equipped with a wind guiding component 30. The wind guiding component 30 is used to limit the frequency of heat contact with the outside cold air, so that the heat is concentrated inside the support base 11. At the same time, it guides the wind flow through multiple paths, so that when the wind flows through different paths to the end of the path, the wind in different directions will collide with each other, forming an upward wind that contacts the bottom of the circuit board. In this process, the wind maintains its heat through aluminum heat dissipation during the flow. The hot air manufacturing assembly 20 includes two rotating wheels 21, both of which are installed inside the support base 11. Each of the two rotating wheels 21 has a connecting block 22 at its bottom. Each of the two connecting blocks 22 has a conveyor belt 23 meshing on its surface. A first motor 24 is installed at the bottom of the connecting block 22. The first motor 24 is used to drive the connecting block 22 to rotate. The first motor 24 is installed inside the welding machine and can be detached from the connecting block 22. A heating tube 25 is installed inside the support base 11. The first motor 24 is generally built into the welding machine.

[0028] When guiding wind, the wind flow will cause heat loss, affecting the heating efficiency of the electronic board. Forcibly increasing the temperature of the heating wire will cause a significant waste of energy. Moreover, overheating inside the welding machine will damage the components, which is not conducive to production. Therefore, the wind guiding component 30 includes a diversion plate 31, which is installed inside the support base 11. Several aluminum blocks 32 are installed inside the support base 11. A ventilation plate 33 is provided inside the support base 11. A sealing plate 34 is rotatably connected inside the support base 11. The other end of the sealing plate 34 is connected to a first torsion spring 35. The other end of the first torsion spring 35 is connected to the support base 11. Under normal conditions, the sealing plate 34 and the support base 11 are kept parallel by the elastic force generated by the first torsion spring 35. The support base 11 is rotatably connected to a ball screw 36. The surface of the ball screw 36 is threaded with two bearing seats 37. The thread grooves of the two bearing seats 37 are in opposite directions. When the ball screw 36 rotates, the two bearing seats 37 will move in opposite directions. The support base 11 is equipped with a second motor 38 for driving the ball screw 36 to rotate. The surface of the support base 11 is provided with a wind direction control component 40. The wind direction control component 40 is used to intercept the wind force after it hits the circuit board, so that the residual heat of the wind force dissipates next to the circuit board, thereby achieving auxiliary heating of the circuit board. Depend on Figures 2-8 As shown, when the electronic board needs to be preheated, the heating tube 25 is first started to work. The heating tube 25 heats the inner cavity of the support base 11. During the heating process, since the rotating wheel 21 does not rotate, only the filter holes on the surface of the ventilation plate 33 can allow cold air from the outside to enter. However, the filter hole area is small, and the rate at which cold air enters does not affect the rapid heating inside the support base 11, thus accumulating heat. After the heating element 25 heats the inner cavity of the support base 11 to the temperature required for preheating the electronic board, the first motor 24 is started. The first motor 24 drives the connecting block 22 to rotate, which in turn causes the conveyor belt 23 to rotate. The rotation of the two conveyor belts 23 causes the two rotating wheels 21 to rotate simultaneously. The rotation of the rotating wheels 21 blows air into the inner cavity of the support base 11, and the airflow carries heat towards the sealing plate 34. At the same time, according to the length of the electronic board, the second motor 38 is started. The second motor 38 drives the ball screw 36 to rotate. During the rotation of the ball screw 36... The two bearing seats 37 move in opposite directions. The ball screw 36 keeps the distance between the two bearing seats 37 consistent with the length of the electronic board. This ensures that the airflow from the support base 11 must first contact the bottom of the electronic board before it can be discharged. At the same time, the sealing plate 34 will move towards the electronic board when impacted. The airflow is guided by the bearing seats 37 during the flow and moves towards the ventilation plate 33. The airflow from the ventilation plate 33 heats the electronic board together, preventing the airflow from coming into contact with the outside environment over a large area during the flow, thus avoiding direct airflow to the bottom of the electronic board and preventing energy waste. During the movement of the wind, the aluminum block 32 has thermal conductivity and absorbs the heat emitted by the rotor 21. Then, during the heat dissipation process, the heat is absorbed by the wind during the movement, so that the heat is replenished in time during the movement of the wind and the heating effect of the contact electronic board is guaranteed. At the same time, some of the airflow is discharged from the ventilation plate 33 into the inner cavity of the support base 11 and moves upward in a straight line. At this time, the airflow moving out from the sealing plate 34 will be guided by the upward airflow and follow the upward airflow to contact the bottom of the electronic board, thereby heating the bottom of the electronic board.

[0029] When a wave soldering machine preheats an electronic board, it uses side-blowing air to heat the bottom of the board. However, the side-blowing air gradually expands as it moves, and since the electronic board is relatively thin, the airflow cannot fully contact the board, resulting in wasted airflow. If the airflow is not guided, different parts of the board will receive different amounts of heat, leading to uneven heating and potential damage. Therefore, the airflow control component 40 includes a baffle plate 41, which is rotatably connected to a bearing seat 37. A second torsion spring 42 is connected to the surface of the baffle plate 41, and the other end of the second torsion spring 42 is connected to the bearing seat 37. The second torsion spring 42 generates elastic force to keep the baffle plate 41 in place. Figure 4 The tilt angle in the state will push the wind deflector 41 in the opposite direction of the electronic board when the wind blows. An extension plate 43 is slidably connected inside the wind deflector 41. Bolts 44 are provided on the surface of the wind deflector 41. The extension plate 43 is fixed to the surface of the wind deflector 41 by bolts 44. A fixing plate 45 is provided on the surface of the support base 11. The fixing plate 45 has a toothed groove 46 inside. A support plate 47 is slidably connected to the surface of the fixed plate 45. A gear 49 is rotatably connected to the bottom of the support plate 47. The gear 49 meshes with the tooth groove 46. A third motor 48 is provided on the surface of the support plate 47 to drive the gear 49 to rotate. The rotation of the gear 49 drives the support plate 47 to move laterally. The movement of the support plate 47 will limit the rotation angle of the windshield 41. Depend on Figures 4-6 As shown, before preheating the bottom of the electronic board, the extension plate 43 is moved inside the baffle plate 41 according to the distance between the baffle plate 41 and the electronic board, so that the extension plate 43 is 3cm away from the electronic board in the vertical state at the top of the support base 11. This distance can be adjusted according to the weight of the electronic board. The lighter the weight, the longer the distance. Then, the third motor 48 is started, which drives the gear 49 to rotate. The rotation of the gear 49 engages with the tooth groove 46, pushing the support plate 47 to move laterally. This causes the support plate 47 to move above the wind deflector 41, limiting the rotation angle of the wind deflector 41 to be at most perpendicular to the support base 11. When the wind blows the wind deflector 41 to rotate, the second torsion spring 42 generates elastic force to push the wind deflector 41 back to its original position. This allows the wind deflector 41 to continuously block the flowing wind, so that after the wind comes into contact with the electronic board and disperses, it is intercepted by the wind deflector 41 and the extension plate 43. This allows the heat to dissipate at the bottom of the electronic board, improving the heating efficiency of the electronic board and preventing the heat from dissipating too far from the electronic board, thus improving the energy-saving effect of the device.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving wave soldering preheating device, characterized in that: Includes a support base (11), the surface of which is provided with a hot air generating component (20), the hot air generating component (20) is used to generate heat inside the support base (11) and convert the heat into hot air to blow; The support base (11) is provided with a wind guiding component (30). The wind guiding component (30) is used to limit the frequency of heat contact with the outside cold air, so that heat is concentrated inside the support base (11). At the same time, it guides the wind flow through multiple paths, so that when the wind flows through different paths to the end of the path, the wind in different directions will collide with each other, forming an upward wind contacting the bottom of the circuit board. In this process, the wind maintains its heat through aluminum heat dissipation during the flow. The wind guiding component (30) includes a diversion plate (31), which is installed inside a support base (11). Several aluminum blocks (32) are installed inside the support base (11), and a ventilation plate (33) is provided inside the support base (11). The support base (11) is rotatably connected to a closed plate (34), and the other end of the closed plate (34) is connected to a first torsion spring (35). The other end of the first torsion spring (35) is connected to the support base (11). Under normal conditions, the closed plate (34) and the support base (11) are parallel by the elastic force generated by the first torsion spring (35). The support base (11) is rotatably connected to a ball screw (36), and the surface of the ball screw (36) is threaded with two bearing seats (37). The thread grooves of the two bearing seats (37) are opposite in direction. When the ball screw (36) rotates, the two bearing seats (37) will move in opposite directions. The support base (11) is equipped with a second motor (38) for driving the ball screw (36) to rotate. The surface of the support base (11) is provided with a wind direction control component (40), which is used to intercept the wind force after it hits the circuit board, so that the residual heat of the wind force dissipates next to the circuit board, thereby achieving auxiliary heating of the circuit board. The wind direction control component (40) includes a wind deflector (41), which is rotatably connected to a bearing seat (37). A second torsion spring (42) is connected to the surface of the wind deflector (41), and the other end of the second torsion spring (42) is connected to the bearing seat (37). An extension plate (43) is slidably connected inside the wind deflector (41).

2. The energy-saving wave soldering preheating device according to claim 1, characterized in that: The hot air manufacturing assembly (20) includes two rotating wheels (21), both of which are installed inside the support base (11), and both of the rotating wheels (21) have connecting blocks (22) at their bottoms.

3. The energy-saving wave soldering preheating device according to claim 2, characterized in that: The two connecting blocks (22) are meshed with conveyor belts (23). The bottom of the connecting block (22) is provided with a first motor (24). The first motor (24) is used to drive the connecting block (22) to rotate. The first motor (24) is installed inside the welding machine and can be disassembled from the connecting block (22). The support base (11) is equipped with a heating tube (25).

4. The energy-saving wave soldering preheating device according to claim 3, characterized in that: The wind deflector (41) is provided with bolts (44), the extension plate (43) is fixed to the surface of the wind deflector (41) by bolts (44), the support base (11) is provided with a fixing plate (45), and the fixing plate (45) is provided with a toothed groove (46) inside.

5. The energy-saving wave soldering preheating device according to claim 4, characterized in that: A support plate (47) is slidably connected to the surface of the fixed plate (45). A gear (49) is rotatably connected to the bottom of the support plate (47). The gear (49) meshes with the tooth groove (46). A third motor (48) is provided on the surface of the support plate (47) to drive the gear (49) to rotate. The gear (49) rotates to drive the support plate (47) to move laterally. The movement of the support plate (47) will limit the rotation angle of the windshield (41).

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