Hot air reflow soldering machine and method for processing power module

Abstract

The invention discloses a hot air reflow soldering machine and method for processing a power module, and relates to the technical field of reflow soldering machines. The device comprises a device body, a transmission assembly is arranged at the top of the device body and composed of a frame and a conveying belt, a U-shaped storage rack is arranged at the top of the conveying belt in the transmission assembly, a machining assembly is arranged at the top of the transmission assembly, a sliding rail is arranged at the edge of the inner wall of the machining assembly, and a heating assembly is arranged in the sliding rail; a hot air gun assembly is arranged in the center of the inner wall of the machining assembly. An anti-clearance device is arranged in the machining assembly, and an anti-pollution device is arranged above the anti-clearance device. The pressing plate assembly is made to be attached to the top edge of the welding element all the time, the welding stability of the welding element and the parent body is guaranteed, and therefore it is guaranteed that the gap between the welding element and the parent body can be evenly filled with molten brazing filler metal, and the welding strength between the welding element and the parent body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of reflow soldering machines, and in particular to a hot air reflow soldering machine and method for processing a power module. Background Art

[0002] The power module is an integrated voltage conversion circuit. Its normal function is to convert the mains electricity into a voltage suitable for use by electrical equipment. At the same time, the reflow soldering machine is mainly used to melt the solder paste on the PCB with mounted electronic components, that is, to place the chip components of the PCB on the solder paste.

[0003] The patent with the patent announcement number CN211490002U discloses a reflow soldering machine for power module production, including a body, an inner cavity is opened inside the body, a lower slide rail is fixedly installed at the bottom of the inner cavity side, a slide plate is movably sleeved inside the lower slide rail, an upper slide rail is fixedly installed in the middle of the inner cavity side, a draw plate is movably sleeved inside the upper slide rail, and a fan is fixedly installed on the top surface of the inner cavity. The reflow soldering machine for power module production is achieved by fixing a fixed plate above the draw plate and connecting a threaded rod on one side of the fixed plate, by sleeved a horizontal plate on the threaded rod, rotating a locking cap to move the horizontal plate, and driving the round rod connected to one side of the horizontal plate to move, the round rod overcomes the spring force to drive the clamping plate to clamp the PCB on the draw plate, effectively clamping and fixing the PCB, avoiding the PCB from being offset, improving the soldering effect of the reflow soldering machine, and being adaptable to PCB boards of various sizes and specifications, with good use effect.

[0004] However, the device still has some shortcomings: the device can adaptively and stably clamp welding components of various sizes, but when the device is used to weld materials, the application of the solder may not be uniform, resulting in the molten solder not filling the gap between the welding component and the matrix evenly, which can easily reduce the welding strength between the welding component and the matrix and thus reduce the welding quality. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a hot air reflow soldering machine and method for processing a power module, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A hot air reflow soldering machine for power module processing, comprising a device body, a transmission assembly is arranged on the top of the device body, the transmission assembly is composed of a frame and a conveyor belt, a U-shaped rack is arranged on the top of the conveyor belt in the transmission assembly, a processing assembly is arranged on the top of the transmission assembly, a slide rail is arranged at the edge of the inner wall of the processing assembly, a heating assembly is arranged inside the slide rail, and a hot air gun assembly is arranged at the center of the inner wall of the processing assembly; An anti-gap device is provided inside the processing component, an anti-pollution device is provided above the anti-gap device, and an anti-scattering device is provided outside the anti-pollution device; The anti-gap device includes an electric rotating rod, the top of which is rotatably installed at the top center of the inner wall of the processing component, the outer wall of the electric rotating rod is provided with a reciprocating spiral groove, the outer wall of the reciprocating spiral groove of the electric rotating rod penetrates and is movably provided with a bearing plate, two square grooves are symmetrically provided inside the bearing plate, an elastic telescopic rod is fixedly installed at the bottom corner of the bearing plate, a pressure plate assembly is fixedly installed at the bottom of the telescopic end of the elastic telescopic rod, the bottom of the pressure plate assembly is designed as a soft surface, a circular groove is provided inside the pressure plate assembly, a limiting rod is penetrated and slidably installed on the outer wall of the bearing plate, a round rod is fixedly installed inside the circular groove of the pressure plate assembly, and the outer wall of the round rod is penetrated and hinged A ramp is connected, a U-shaped groove is provided at the bottom of the ramp, an anti-skid wheel is rotatably installed on the inner wall of the U-shaped groove of the ramp, a rotating column is fixedly installed on the side of the anti-skid wheel, and a plurality of telescopic arc plates are equidistantly and fixedly installed on the outer wall of the rotating column. The transmission component is started, and the material is placed inside the U-shaped rack. Then, the conveyor belt in the transmission component transports the U-shaped rack from the left to the inside of the processing component. At the same time, the heating component reciprocates and slides horizontally inside the slide rail to expand its own range of movement and temperature uniformity. When the U-shaped rack moves to the center of the processing component, the transmission component stops running, and the hot air gun component heats and melts the solder in the material, promoting the solder and the welding element The U-shaped rack is sent out of the processing assembly by the transmission assembly after the U-shaped rack is suspended at the center of the processing assembly. The electric rotating rod is started. When the electric rotating rod rotates, the reciprocating spiral groove on its outer wall limits the built-in block of the carrier plate, so that the carrier plate can slide downward along the outer wall of the electric rotating rod. At this time, the limit rod limits the carrier plate, and the carrier plate drives the elastic telescopic rod to move synchronously. The telescopic end of the elastic telescopic rod drives the pressing plate assembly to move downward until the soft surface at the bottom of the pressing plate assembly presses the top edge of the welding element to complete the positioning and pressing between the welding element and the matrix. At the same time, when the equipment as a whole vibrates or shakes, the pressing plate assembly is used to The soft surface at the bottom and the elasticity of the built-in spring of the elastic telescopic rod are used for buffering; the pressure plate assembly drives the round rod to move synchronously, and the round rod drives the inclined plate to move downward and contact the top of the welding element to generate a resistance force, and the inclined plate flips along the outer wall of the round rod away from the center of the pressure plate assembly through the resistance force, and at the same time, the inclined plate drives the anti-skid wheel to move synchronously, and the anti-skid wheel can slide, rub and rotate along the top of the welding element under the push of the inclined plate, and the anti-skid wheel drives the rotating column to rotate when rotating along the inner wall of the inclined plate, and the rotating column drives the telescopic arc plate to rotate, and when the telescopic arc plate revolves, the arc surface of its outer wall contacts the top of the welding element to generate a resistance force, and the telescopic end of the telescopic arc plate contracts toward the inside of the fixed end through the resistance force until it coincides with the outer wall of the anti-skid wheel.

[0007] According to the above technical solution, the top of the limit rod is fixedly installed on the top of the inner wall of the processing component, a torsion spring is arranged between the inside of the inclined plate and the round rod, and several of the telescopic arc plates are protruding from the outer wall of the anti-skid wheel, and the telescopic arc plates have springs built in.

[0008] According to the above technical scheme, the anti-pollution device includes a smoke exhaust component, a spiral hose, a fixed frame and a smoke inlet component. The bottom of the smoke exhaust component is fixedly installed on the top of the processing component, the top of the spiral hose is connected and fixedly installed on the bottom of the smoke exhaust component, the outer wall of the fixed frame is fixedly installed inside the square groove of the bearing plate, the outer wall of the smoke inlet component is fixedly installed on the inner wall of the fixed frame, and the top of the smoke inlet component is connected and fixedly installed on the bottom of the spiral hose. When the welding work starts, the smoke exhaust component is started, and the suction generated by the smoke exhaust component is transmitted to the smoke inlet component through the spiral hose. At the same time, the fixed frame is driven to move synchronously during the downward movement of the bearing plate, and the fixed frame drives the smoke inlet component to move downward.

[0009] According to the above technical scheme, the anti-pollution device also includes an L-shaped telescopic plate, a fixed plate, a vibrating plate and a resistance plate. The bottom of the L-shaped telescopic plate is fixedly installed at the top edge of the fixed frame, the fixed plate is fixedly installed on the outer wall of the fixed end of the L-shaped telescopic plate close to the spiral hose, the vibrating plate is fixedly installed on the outer wall of the fixed plate away from the center of the smoke exhaust component, and the top of the resistance plate is fixedly installed on the top of the inner wall of the processing component. The fixed frame drives the L-shaped telescopic plate to move downward, and the L-shaped telescopic plate drives the fixed plate to move synchronously. In the process of the fixed plate driving the vibrating plate to move downward, it will contact the arc surface on the outside of the resistance plate. The resistance plate is limited by the processing component, so that the vibrating plate is bent and deformed when it contacts the arc surface of the resistance plate. After the vibrating plate passes over the resistance plate, it will swing back and forth in the process of resetting through its own toughness to generate vibration, and the smoke inlet component is caused to vibrate synchronously through the transmission of force.

[0010] According to the above technical solution, the outer wall of the abutment plate passes through the interior of the L-shaped telescopic plate, and the arc surface of the abutment plate on one side away from the center of the smoke exhaust assembly is located on the movement trajectory of the vibration plate.

[0011] According to the above technical scheme, the anti-drifting device includes an activated carbon plate, a sliding column, a concave block and a shielding plate. The front and back sides of the activated carbon plate are respectively hinged to the front and back sides of the inner wall of the square groove of the supporting plate. A limiting groove is arranged at the bottom of the activated carbon plate. Both ends of the sliding column are rotatably installed inside the limiting groove of the activated carbon plate. The concave block is arranged on the inner side of the sliding column. The top of the shielding plate is hinged at the outer wall of the smoke inlet component. The arc outer wall of the shielding plate is fixedly connected to the concave block. When the smoke inlet component moves downward, the shielding plate is driven to move synchronously. The shielding plate drives the concave block to move synchronously. At the same time, when the supporting plate moves downward, the top of the activated carbon plate is no longer affected. When the activated carbon plate is reset, it drives the sliding column to slide along the arc surface of the outer wall of the concave block to cause the resistance force, so that the hinge axis of the baffle plate rotates and resets to block the smoke inlet.

[0012] According to the above technical solution, the top of the activated carbon plate contacts the top of the inner wall of the processing component, the side of the activated carbon plate close to the axis of the supporting plate contacts the telescopic end of the L-shaped telescopic plate, a torsion spring is arranged between the top of the baffle plate and the inside of the smoke inlet component, and the concave block is located on the movement trajectory of the sliding column.

[0013] According to the above technical solution, the anti-scattering device also includes a sliding plate, a support plate, a U-shaped telescopic frame, a sliding frame, a transmission rod and a spiral guide plate. The sliding plate is slidably installed on the outer wall of the activated carbon plate away from the L-shaped telescopic plate. The top of the support plate is hinged to the side of the sliding plate away from the activated carbon plate through a torsion spring. The top of the U-shaped telescopic frame is hinged to the top of the inner wall of the fixed end of the L-shaped telescopic plate through a torsion spring. The sliding frame is slidably installed on the inner wall of the activated carbon plate away from the L-shaped telescopic plate. Both ends of the transmission rod are rotatably installed on the inner wall of the sliding frame. The inner wall of the spiral guide plate is fixedly installed on the outer wall of the transmission rod. The activated carbon plate When flipping, it drives the sliding plate to move synchronously. When the sliding plate moves, it prompts the hinge shaft of the support plate to start rotating and causes the support plate to flip upward in an arc trajectory. The support plate supports the activated carbon plate to ensure that the activated carbon plate always moves smoothly to avoid derailment. At the same time, when the activated carbon plate is flipped, it will also drive the sliding frame to move synchronously. The sliding frame drives the telescopic end of the U-shaped telescopic frame to move synchronously. The hinge shaft at the top of the U-shaped telescopic frame starts to rotate and pushes the sliding frame to slide downward along the inner wall of the activated carbon board. The sliding frame drives the transmission rod to move synchronously. The outer wall of the transmission rod contacts the inner wall of the activated carbon board to generate friction and starts to rotate. The transmission rod drives the spiral guide vane to rotate.

[0014] According to the above technical solution, the bottom of the support plate is hinged to the top of the load-bearing plate, the outer wall of the sliding frame is hinged inside the telescopic end of the U-shaped telescopic frame, the outer wall of the transmission rod contacts the inner wall of the activated carbon plate, and the transmission rod is designed to be thick at both ends and thin in the center.

[0015] A method for using a hot air reflow soldering machine for processing a power module comprises the following steps: S1: Start the transmission component and place the material inside the U-shaped rack. Then the conveyor belt in the transmission component transports the U-shaped rack from the left to the inside of the processing component. At the same time, the heating component reciprocates and slides horizontally inside the slide rail to expand its range of movement and temperature uniformity. S2: When the U-shaped rack moves to the center of the processing assembly, the transmission assembly stops running. At this time, the hot air gun assembly heats and melts the solder in the material, so that the solder and the welding element are fully in contact to complete the welding work. Then the transmission assembly sends the U-shaped rack out of the processing assembly. S3: When the U-shaped rack is suspended at the center of the processing assembly, the electric rotating rod is started. When the electric rotating rod rotates, the reciprocating spiral groove on its outer wall limits the built-in block of the carrier plate, so that the carrier plate can slide downward along the outer wall of the electric rotating rod. At this time, the limit rod limits the carrier plate. S4: The load-bearing plate drives the elastic telescopic rod to move synchronously, and the telescopic end of the elastic telescopic rod drives the pressure plate assembly to move downward until the soft surface at the bottom of the pressure plate assembly presses the top edge of the welding element to complete the positioning and pressing between the welding element and the matrix. At the same time, when the entire equipment vibrates or shakes, the soft surface at the bottom of the pressure plate assembly and the elasticity of the built-in spring of the elastic telescopic rod are used for buffering.

[0016] The present invention provides a hot air reflow soldering machine and method for processing a power module, which has the following beneficial effects: (1) The present invention sets an anti-gap device, and cooperates with an electric rotating rod, a bearing plate, an elastic telescopic rod, a pressure plate assembly, a limiting rod, a round rod, an inclined plate, an anti-skid wheel, a rotating column and a telescopic arc plate to ensure that the pressure plate assembly is always in contact with the top edge of the welding element, thereby ensuring the stability of the welding element and the matrix during welding, thereby ensuring that the molten solder can be evenly filled in the gap between the welding element and the matrix, thereby improving the welding strength between the welding element and the matrix; at the same time, relying on the rotation and telescopic pressing of the telescopic arc plate, the pressure plate assembly is prompted to perform good leveling work through the telescopic arc plate when stably pressing the welding element, thereby avoiding the slight tilt between the welding element and the matrix, which makes it difficult for the molten solder to be evenly filled in the connecting end of the two during welding, resulting in reduced welding strength and affecting the later service life.

[0017] (2) The present invention sets an anti-pollution device, and cooperates with a fixed frame, a smoke exhaust assembly, a spiral hose, a fixed frame, a smoke inlet assembly, an L-shaped telescopic plate, a fixed plate, a vibrating plate and a resistance plate to enable the smoke inlet assembly to be closer to the source of smoke generated during welding, so as to absorb the smoke in time and prevent smoke particles from adhering to the surface of the welding component and causing pollution during the smoke floating, and at the same time prevent smoke particles from eroding the unsolidified solder and reducing the tightness between the welding component and the matrix; and use the L-shaped telescopic plate to cover the smoke floating upward, and at the same time cause the spiral hose to vibrate slightly when the smoke inlet assembly vibrates, so that the spiral hose can transport smoke particles faster, and at the same time effectively prevent particles from adhering to the inner wall of the spiral hose and causing transportation blockage, so as to avoid smoke from being difficult to discharge and continuously corroding and polluting the welding component.

[0018] (3) The present invention sets an anti-drifting device, and cooperates with a smoke inlet assembly, an activated carbon plate, a sliding column, a concave block, a baffle, a sliding plate, a support plate, a U-shaped telescopic frame, a sliding frame, a transmission rod and a spiral guide plate. The baffle plate is used to cover the smoke inlet when the smoke inlet assembly is not in use, so as to prevent the smoke inlet assembly from being corroded and accelerated by external dirt, and simultaneously prevent the inside of the smoke inlet assembly from being corroded by dirt falling back due to reflux, and the L-shaped telescopic plate cooperates with the activated carbon plate to form a relatively closed space to intercept the drifting smoke, thereby further improving the smoke extraction quality of the smoke inlet assembly; at the same time, with the help of the spiral guide plate, during the uninterrupted processing of the welding element, the spiral guide plate indirectly rotates and disturbs the harmful substances in the residual smoke to facilitate absorption and purification by the activated carbon plate, thereby preventing the harmful substances from being accumulated in the processing assembly for a long time and causing harm to the health of the equipment maintenance personnel, and the L-shaped telescopic plate and the activated carbon plate shield each other to effectively prevent the harmful substances from overflowing, thereby ensuring that the harmful substances are absorbed in time under the disturbance of the spiral guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a schematic diagram of the internal structure of the present invention as a whole; Figure 3 It is a schematic diagram of the anti-gap device of the present invention; Figure 4 It is a schematic cross-sectional view of the overall anti-gap device of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure enlargement in the middle; Figure 6 It is a schematic diagram of the anti-pollution device of the present invention; Figure 7 This is a schematic diagram of the anti-pollution device of the present invention from a bottom perspective; Figure 8 This is a schematic diagram of the anti-scattering device of the present invention; Fig. 9 It is a cross-sectional schematic diagram of the anti-scattering device of the present invention; Fig.10 For the present invention Fig. 9 Enlarged schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. Device body; 2. Transmission assembly; 21. U-shaped rack; 3. Processing assembly; 31. Slide rail; 32. Heating assembly; 33. Hot air gun assembly; 4. Anti-gap device; 41. Electric rotating rod; 42. Loading plate; 43. Elastic telescopic rod; 44. Press plate assembly; 45. Limit rod; 46. Round rod; 47. Inclined plate; 48. Anti-slip wheel; 49. Rotating column; 410. Telescopic arc plate; 5. Anti-pollution device ; 51. Smoke exhaust assembly; 52. Spiral hose; 53. Fixed frame; 54. Smoke inlet assembly; 55. L-shaped telescopic plate; 56. Fixed plate; 57. Vibrating plate; 58. Resistance plate; 6. Anti-drifting device; 61. Activated carbon plate; 62. Sliding column; 63. Concave block; 64. Shielding plate; 65. Sliding plate; 66. Support plate; 67. U-shaped telescopic frame; 68. Sliding frame; 69. Transmission rod; 610. Spiral guide vane. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figure 1-Figure 10 One embodiment of the present invention is: a hot air reflow soldering machine for processing a power module, comprising a device body 1, a transmission assembly 2 is arranged on the top of the device body 1, the transmission assembly 2 is composed of a frame and a conveyor belt, a U-shaped rack 21 is arranged on the top of the conveyor belt in the transmission assembly 2, a processing assembly 3 is arranged on the top of the transmission assembly 2, a slide rail 31 is arranged at the edge of the inner wall of the processing assembly 3, a heating assembly 32 is arranged inside the slide rail 31, and a hot air gun assembly 33 is arranged at the center of the inner wall of the processing assembly 3; An anti-gap device 4 is provided inside the processing component 3, an anti-pollution device 5 is provided above the anti-gap device 4, and an anti-scattering device 6 is provided outside the anti-pollution device 5; The anti-gap device 4 includes an electric rotating rod 41, the top of which is rotatably installed at the top center of the inner wall of the processing component 3, the outer wall of the electric rotating rod 41 is provided with a reciprocating spiral groove, the outer wall of the reciprocating spiral groove of the electric rotating rod 41 is penetrated and a bearing plate 42 is movably installed, two square grooves are symmetrically provided inside the bearing plate 42, an elastic telescopic rod 43 is fixedly installed at the bottom corner of the bearing plate 42, a pressure plate assembly 44 is fixedly installed at the bottom of the telescopic end of the elastic telescopic rod 43, the bottom of the pressure plate assembly 44 is designed as a soft surface, a circular groove is provided inside the pressure plate assembly 44, the outer wall of the bearing plate 42 is penetrated and a limiting rod 45 is slidably installed, a round rod 46 is fixedly installed inside the circular groove of the pressure plate assembly 44, the outer wall of the round rod 46 is penetrated and hinged with an inclined plate 47, a U-shaped groove is provided at the bottom of the inclined plate 47, and an anti-slip Wheel 48, a rotating column 49 is fixedly installed on the side of the anti-skid wheel 48, and a plurality of telescopic arc plates 410 are equidistantly and fixedly installed on the outer wall of the rotating column 49. Through the above cooperation, the pressure plate assembly 44 is always in contact with the top edge of the welding element, ensuring the stability of the welding element and the matrix during welding, thereby ensuring that the molten solder can be evenly filled in the gap between the welding element and the matrix, thereby improving the welding strength between the welding element and the matrix; through the above cooperation, relying on the rotation and telescopic pressing of the telescopic arc plate 410, the pressure plate assembly 44 performs good leveling work through the telescopic arc plate 410 when stably pressing the welding element, avoiding the slight tilt between the welding element and the matrix, which makes it difficult for the molten solder to be evenly filled in the connecting end of the two during welding, resulting in reduced welding strength and affecting the later service life.

[0023] The top of the limiting rod 45 is fixedly installed on the top of the inner wall of the processing component 3, a torsion spring is arranged between the inside of the inclined plate 47 and the round rod 46, and a plurality of telescopic arc plates 410 are all protruding from the outer wall of the anti-slip wheel 48, and the telescopic arc plates 410 have springs built in.

[0024] When in use, the transmission component 2 is started, and the material is placed inside the U-shaped rack 21. Then, the conveyor belt in the transmission component 2 transports the U-shaped rack 21 from the left to the inside of the processing component 3. At the same time, the heating component 32 reciprocates and slides horizontally inside the slide rail 31 to expand its own range of movement and temperature uniformity. When the U-shaped rack 21 moves to the center of the processing component 3, the transmission component 2 stops running. At this time, the hot air gun component 33 heats and melts the solder in the material, so that the solder is fully in contact with the welding element to complete the welding work, and then the transmission component 2 sends the U-shaped rack 21 out of the processing component 3; when the U-shaped rack 21 is suspended at the center of the processing component 3 When the electric rotating rod 41 is started, the reciprocating spiral groove on the outer wall of the electric rotating rod 41 limits the built-in block of the carrying plate 42 when the electric rotating rod 41 rotates, so that the carrying plate 42 can slide downward along the outer wall of the electric rotating rod 41. At this time, the limiting rod 45 limits the carrying plate 42, and the carrying plate 42 drives the elastic telescopic rod 43 to move synchronously. The telescopic end of the elastic telescopic rod 43 drives the pressing plate assembly 44 to move downward until the soft surface at the bottom of the pressing plate assembly 44 presses the top edge of the welding element to complete the positioning and pressing between the welding element and the matrix. At the same time, when the whole device vibrates or shakes, the soft surface at the bottom of the pressing plate assembly 44 and the elasticity of the built-in spring of the elastic telescopic rod 43 are used for buffering. The pressing plate assembly 44 is made to always fit the top edge of the welding element to ensure the stability of the welding element and the matrix during welding, so as to ensure that the molten solder can be evenly filled in the gap between the welding element and the matrix, thereby improving the welding strength between the welding element and the matrix; the pressing plate assembly 44 drives the round rod 46 to move synchronously, and the round rod 46 drives the inclined plate 47 to move downward and contact the top of the welding element to generate a resistance force, and the inclined plate 47 is turned along the outer wall of the round rod 46 away from the center of the pressing plate assembly 44 by the resistance force, and at the same time, the inclined plate 47 drives the anti-skid wheel 48 to move synchronously, and the anti-skid wheel 48 can slide and rub along the top of the welding element and rotate under the push of the inclined plate 47, and the anti-skid wheel 48 moves along When the inner wall of the inclined plate 47 rotates, the rotating column 49 is driven to rotate, and the rotating column 49 drives the telescopic arc plate 410 to rotate. When the telescopic arc plate 410 revolves, the arc surface of its outer wall contacts the top of the welding element to generate a resistance force, and the telescopic end of the telescopic arc plate 410 contracts toward the inside of the fixed end through the resistance force until it coincides with the outer wall of the anti-skid wheel 48. Through the above cooperation, relying on the rotation and telescopic pressing of the telescopic arc plate 410, the pressure plate assembly 44 performs good leveling work through the telescopic arc plate 410 when performing stable pressing on the welding element, avoiding the slight tilt between the welding element and the matrix, which makes it difficult for the molten solder to be evenly filled in the connecting end of the two during welding, resulting in reduced welding strength and thus affecting the later service life.

[0025] See also Figure 1-Figure 10 , based on the above embodiment, another embodiment of the present invention further includes an anti-pollution device 5; The anti-pollution device 5 includes a smoke exhaust component 51, a spiral hose 52, a fixed frame 53 and a smoke inlet component 54. The bottom of the smoke exhaust component 51 is fixedly installed on the top of the processing component 3, the top of the spiral hose 52 is connected and fixedly installed on the bottom of the smoke exhaust component 51, the outer wall of the fixed frame 53 is fixedly installed inside the square groove of the bearing plate 42, the outer wall of the smoke inlet component 54 is fixedly installed on the inner wall of the fixed frame 53, and the top of the smoke inlet component 54 is connected and fixedly installed on the bottom of the spiral hose 52. Through the above cooperation, the smoke inlet component 54 can be closer to the source of smoke generated during welding, so as to absorb the smoke in time, prevent the smoke particles from adhering to the surface of the welding component to cause pollution during the smoke floating process, and prevent the smoke particles from eroding the unsolidified solder, thereby reducing the tightness between the welding component and the matrix.

[0026] The anti-pollution device 5 also includes an L-shaped telescopic plate 55, a fixed plate 56, a vibrating plate 57 and a contact plate 58. The bottom of the L-shaped telescopic plate 55 is fixedly installed at the top edge of the fixed frame 53, the fixed plate 56 is fixedly installed on the outer wall of the fixed end of the L-shaped telescopic plate 55 close to the spiral hose 52, the vibrating plate 57 is fixedly installed on the outer wall of the fixed plate 56 away from the center of the smoke exhaust component 51, and the top of the contact plate 58 is fixedly installed on the top of the inner wall of the processing component 3. Through the above cooperation, the upwardly floating smoke is covered with the help of the L-shaped telescopic plate 55, and at the same time, the spiral hose 52 is slightly vibrated when the smoke inlet component 54 vibrates, so that the spiral hose 52 conveys the smoke particles faster, and at the same time effectively prevents the particles from adhering to the inner wall of the spiral hose 52 to cause conveying blockage, so as to avoid the smoke from being difficult to discharge and continuously corroding and polluting the welding components.

[0027] The outer wall of the abutment plate 58 penetrates through the interior of the L-shaped telescopic plate 55 , and the arc surface of the abutment plate 58 away from the center of the smoke exhaust assembly 51 is located on the movement trajectory of the vibration plate 57 .

[0028] During use, when the welding work starts, the smoke exhaust component 51 is started, and the suction force generated by the smoke exhaust component 51 is transmitted to the smoke inlet component 54 through the spiral hose 52. At the same time, the fixing frame 53 is driven to move synchronously during the downward movement of the supporting plate 42, and the fixed frame 53 drives the smoke inlet component 54 to move downward. Through the above cooperation, the smoke inlet component 54 can be closer to the source of smoke generated during welding, so as to absorb the smoke in time, and prevent the smoke particles from adhering to the surface of the welding element and causing pollution during the smoke floating process, and at the same time prevent the smoke particles from eroding the unsolidified solder, thereby reducing the tightness between the welding element and the matrix; the fixed frame 53 drives the L-shaped telescopic plate 55 to move downward, the L-shaped telescopic plate 55 drives the fixed plate 56 to move synchronously, and the fixed plate 56 drives the vibration During the downward movement of plate 57, it will contact the arc surface on the outside of the resistance plate 58. The resistance plate 58 is limited by the processing component 3, causing the vibration plate 57 to bend and deform when it contacts the arc surface of the resistance plate 58. After the vibration plate 57 passes over the resistance plate 58, it will swing back and forth in the process of restoring itself through its own toughness, thereby generating vibration. The transmission of force causes the smoke inlet component 54 to vibrate synchronously. Through the above cooperation, the upwardly floating smoke is covered with the help of the L-shaped telescopic plate 55. At the same time, the vibration of the smoke inlet component 54 drives the spiral hose 52 to vibrate slightly, so that the spiral hose 52 can transport the smoke particles faster, and at the same time effectively prevent the particles from adhering to the inner wall of the spiral hose 52 to cause transportation blockage, thereby preventing the smoke from being difficult to discharge and continuously corroding and polluting the welding components.

[0029] See also Figure 1-Figure 10 , based on the above embodiment, another embodiment of the present invention further includes an anti-scattering device 6; The anti-drifting device 6 includes an activated carbon plate 61, a sliding column 62, a concave block 63 and a shielding plate 64. The front and back sides of the activated carbon plate 61 are respectively hinged to the front and back sides of the inner wall of the square groove of the carrying plate 42. A limiting groove is provided at the bottom of the activated carbon plate 61. Both ends of the sliding column 62 are rotatably installed inside the limiting groove of the activated carbon plate 61. The concave block 63 is arranged on the inner side of the sliding column 62. The top of the shielding plate 64 is hinged at the outer wall of the smoke inlet component 54. The arc outer wall of the shielding plate 64 is fixedly connected to the concave block 63. Through the above cooperation, the shielding plate 64 is used to seal the smoke inlet when the smoke inlet component 54 is not in use, so as to prevent the smoke inlet component 54 from being corroded and accelerated oxidized by external dirt, and simultaneously prevent the inside of the smoke inlet component 54 from corroding the inside of the processing component 3 due to the reflux of dirt. In addition, the L-shaped telescopic plate 55 cooperates with the activated carbon plate 61 to form a relatively closed space to intercept the drifting smoke, thereby further improving the smoke extraction quality of the smoke inlet component 54.

[0030] The top of the activated carbon plate 61 contacts the top of the inner wall of the processing component 3, and the side of the activated carbon plate 61 close to the axis of the supporting plate 42 contacts the telescopic end of the L-shaped telescopic plate 55. A torsion spring is arranged between the top of the baffle plate 64 and the inside of the smoke inlet component 54, and the concave block 63 is located on the movement trajectory of the sliding column 62.

[0031] The anti-scattering device 6 also includes a sliding plate 65, a support plate 66, a U-shaped telescopic frame 67, a sliding frame 68, a transmission rod 69 and a spiral guide plate 610. The sliding plate 65 is slidably installed on the outer wall of the activated carbon plate 61 away from the side of the L-shaped telescopic plate 55. The top of the support plate 66 is hinged to the side of the sliding plate 65 away from the activated carbon plate 61 through a torsion spring. The top of the U-shaped telescopic frame 67 is hinged to the top of the inner wall of the fixed end of the L-shaped telescopic plate 55 through a torsion spring. The sliding frame 68 is slidably installed on the inner wall of the activated carbon plate 61 away from the side of the L-shaped telescopic plate 55. Both ends of the transmission rod 69 are rotatably installed in the sliding frame 68. The inner wall of the spiral guide plate 610 is fixedly installed on the outer wall of the transmission rod 69. Through the above cooperation, with the help of the spiral guide plate 610, during the uninterrupted processing of the welding element, the spiral guide plate 610 indirectly rotates to disturb the harmful substances in the residual smoke, so that they are conveniently absorbed and purified by the activated carbon plate 61, thereby preventing the harmful substances from accumulating inside the processing component 3 for a long time and causing harm to the health of the equipment maintenance personnel. In addition, the L-shaped telescopic plate 55 and the activated carbon plate 61 shield each other to effectively prevent the harmful substances from overflowing, thereby ensuring that the harmful substances are absorbed in time under the disturbance of the spiral guide plate 610.

[0032] The bottom of the support plate 66 is hinged to the top of the bearing plate 42, the outer wall of the sliding frame 68 is hinged inside the telescopic end of the U-shaped telescopic frame 67, the outer wall of the transmission rod 69 contacts the inner wall of the activated carbon plate 61, and the transmission rod 69 is designed to be thick at both ends and thin in the center.

[0033] When in use, the smoke inlet component 54 moves downward and drives the shielding plate 64 to move synchronously, and the shielding plate 64 drives the concave block 63 to move synchronously. At the same time, the support plate 42 moves downward, which causes the top of the activated carbon plate 61 to no longer be resisted by the top of the inner wall of the processing component 3. When the activated carbon plate 61 is reset by the torsion spring, its own hinge axis will flip downward along the inner wall of the support plate 42 in an arc trajectory, and the telescopic end of the L-shaped telescopic plate 55 will gradually extend as the activated carbon plate 61 flips. At the same time, the activated carbon plate 61 drives the sliding column 62 to move synchronously, and the sliding column 62 is freed from the limiting resistance to the concave block 63. At this time, when the shielding plate 64 is reset by the torsion spring, it causes its own hinge axis to start to rotate. The shielding plate 64 rotates away from the axis of the smoke inlet component 54 to open the shielding of the smoke inlet port of the smoke inlet component 54. When the activated carbon plate 61 is reset, it drives the sliding column 62 to slide along the arc surface of the outer wall of the concave block 63 to induce the resistance force, so that the hinge axis of the shielding plate 64 rotates and resets to block the smoke inlet port. Through the above cooperation, the shielding plate 64 is used to cover the smoke inlet port when the smoke inlet component 54 is not in use, so as to prevent the smoke inlet component 54 from being corroded and accelerated by external dirt, and at the same time, prevent the inside of the smoke inlet component 54 from being corroded by the dirt falling back from the processing component 3. In addition, the L-shaped telescopic plate 55 cooperates with the activated carbon plate 61 to form a relatively closed space to intercept the drifting smoke. The smoke extraction quality of the smoke inlet assembly 54 is further improved; when the activated carbon plate 61 is turned over, the sliding plate 65 is driven to move synchronously, and when the sliding plate 65 moves, the hinge shaft of the support plate 66 starts to rotate and causes the support plate 66 to turn upward in an arc trajectory. The support plate 66 supports the activated carbon plate 61 to ensure that the activated carbon plate 61 always moves smoothly to avoid derailment. At the same time, when the activated carbon plate 61 is turned over, it will also drive the sliding frame 68 to move synchronously, and the sliding frame 68 drives the telescopic end of the U-shaped telescopic frame 67 to move synchronously. The hinge shaft at the top of the U-shaped telescopic frame 67 starts to rotate and pushes the sliding frame 68 to slide downward along the inner wall of the activated carbon plate 61, and the sliding frame 68 drives the transmission rod 69 Synchronously moving, the outer wall of the transmission rod 69 contacts the inner wall of the activated carbon plate 61 to generate friction and start to rotate, and the transmission rod 69 drives the spiral guide plate 610 to rotate. Through the above cooperation, with the help of the spiral guide plate 610, during the uninterrupted processing of the welding component, the spiral guide plate 610 indirectly rotates and disturbs the harmful substances in the residual smoke to be easily absorbed and purified by the activated carbon plate 61, preventing the harmful substances from accumulating inside the processing component 3 for a long time and causing harm to the health of the equipment maintenance personnel. In addition, the L-shaped telescopic plate 55 and the activated carbon plate 61 shield each other to effectively prevent the harmful substances from overflowing, ensuring that the harmful substances are absorbed in time under the disturbance of the spiral guide plate 610.

[0034] A method for using a hot air reflow soldering machine for processing a power module comprises the following steps: S1: Start the transmission component 2 and place the material inside the U-shaped rack 21. Then the conveyor belt in the transmission component 2 transports the U-shaped rack 21 from the left to the inside of the processing component 3. At the same time, the heating component 32 reciprocates and slides horizontally inside the slide rail 31 to expand its range of movement and temperature uniformity. S2: When the U-shaped rack 21 moves to the center of the processing assembly 3, the transmission assembly 2 stops running, and the hot air gun assembly 33 heats and melts the solder in the material, so that the solder and the welding element are fully in contact with each other to complete the welding work, and then the transmission assembly 2 sends the U-shaped rack 21 out of the processing assembly 3; S3: When the U-shaped rack 21 is suspended at the center of the processing assembly 3, the electric rotating rod 41 is started. When the electric rotating rod 41 rotates, the reciprocating spiral groove on its outer wall limits the internal block of the carrying plate 42, so that the carrying plate 42 can slide downward along the outer wall of the electric rotating rod 41. At this time, the limiting rod 45 limits the carrying plate 42. S4: The load-bearing plate 42 drives the elastic telescopic rod 43 to move synchronously, and the telescopic end of the elastic telescopic rod 43 drives the pressure plate assembly 44 to move downward until the soft surface at the bottom of the pressure plate assembly 44 presses the top edge of the welding element to complete the positioning and pressing between the welding element and the matrix. At the same time, when the entire device vibrates or shakes, the soft surface at the bottom of the pressure plate assembly 44 and the elasticity of the built-in spring of the elastic telescopic rod 43 are used for buffering.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hot air reflow soldering machine for processing a power module, comprising a device body (1), characterized in that: A transmission assembly (2) is arranged on the top of the device body (1), the transmission assembly (2) is composed of a frame and a conveyor belt, a U-shaped rack (21) is arranged on the top of the conveyor belt in the transmission assembly (2), a processing assembly (3) is arranged on the top of the transmission assembly (2), a slide rail (31) is arranged at the edge of the inner wall of the processing assembly (3), a heating assembly (32) is arranged inside the slide rail (31), and a hot air gun assembly (33) is arranged at the center of the inner wall of the processing assembly (3); An anti-gap device (4) is provided inside the processing component (3), an anti-pollution device (5) is provided above the anti-gap device (4), and an anti-scattering device (6) is provided outside the anti-pollution device (5); The anti-gap device (4) comprises an electric rotating rod (41), the top of the electric rotating rod (41) is rotatably mounted at the top center of the inner wall of the processing component (3), the outer wall of the electric rotating rod (41) is provided with a reciprocating spiral groove, the outer wall of the reciprocating spiral groove of the electric rotating rod (41) is penetrated by a bearing plate (42) which is movably mounted thereon, the inner part of the bearing plate (42) is symmetrically provided with two square grooves, an elastic telescopic rod (43) is fixedly mounted at the bottom corner of the bearing plate (42), a pressing plate assembly (44) is fixedly mounted at the bottom of the telescopic end of the elastic telescopic rod (43), and the bottom of the pressing plate assembly (44) is The part is designed as a soft surface, a circular groove is provided inside the pressure plate assembly (44), a limit rod (45) is penetrated through and slidably installed on the outer wall of the bearing plate (42), a round rod (46) is fixedly installed inside the circular groove of the pressure plate assembly (44), an inclined plate (47) is penetrated through and hinged on the outer wall of the round rod (46), a U-shaped groove is provided at the bottom of the inclined plate (47), an anti-skid wheel (48) is rotatably installed on the inner wall of the U-shaped groove of the inclined plate (47), a rotating column (49) is fixedly installed on the side of the anti-skid wheel (48), and a plurality of telescopic arc plates (410) are equidistantly and fixedly installed on the outer wall of the rotating column (49).

2. The hot air reflow soldering machine for power module processing according to claim 1, characterized in that: The top of the limit rod (45) is fixedly mounted on the top of the inner wall of the processing assembly (3), a torsion spring is arranged between the inside of the inclined plate (47) and the round rod (46), and the plurality of telescopic arc plates (410) are all protruding from the outer wall of the anti-slip wheel (48), and the telescopic arc plates (410) have springs built in.

3. The hot air reflow soldering machine for power module processing according to claim 2, characterized in that: The anti-pollution device (5) comprises a smoke exhaust component (51), a spiral hose (52), a fixing frame (53) and a smoke inlet component (54); the bottom of the smoke exhaust component (51) is fixedly mounted on the top of the processing component (3); the top of the spiral hose (52) is connected to and fixedly mounted on the bottom of the smoke exhaust component (51); the outer wall of the fixing frame (53) is fixedly mounted inside the square groove of the bearing plate (42); the outer wall of the smoke inlet component (54) is fixedly mounted on the inner wall of the fixing frame (53); and the top of the smoke inlet component (54) is connected to and fixedly mounted on the bottom of the spiral hose (52).

4. The hot air reflow soldering machine for power module processing according to claim 3, characterized in that: The anti-pollution device (5) further comprises an L-shaped telescopic plate (55), a fixed plate (56), a vibration plate (57) and a contact plate (58), wherein the bottom of the L-shaped telescopic plate (55) is fixedly mounted on the top edge of the fixed frame (53), the side of the fixed plate (56) close to the spiral hose (52) is fixedly mounted on the outer wall of the fixed end of the L-shaped telescopic plate (55), the side of the vibration plate (57) away from the center of the smoke exhaust component (51) is fixedly mounted on the outer wall of the fixed plate (56), and the top of the contact plate (58) is fixedly mounted on the top of the inner wall of the processing component (3).

5. The hot air reflow soldering machine for power module processing according to claim 4, characterized in that: The outer wall of the abutment plate (58) passes through the interior of the L-shaped telescopic plate (55), and the arc surface of the abutment plate (58) on one side away from the center of the smoke exhaust assembly (51) is located on the movement trajectory of the vibration plate (57).

6. The hot air reflow soldering machine for power module processing according to claim 5, characterized in that: The anti-scattering device (6) comprises an activated carbon plate (61), a sliding column (62), a concave block (63) and a shielding plate (64); the front and back sides of the activated carbon plate (61) are respectively hinged to the front and back sides of the inner wall of the square groove of the bearing plate (42); a limiting groove is provided at the bottom of the activated carbon plate (61); both ends of the sliding column (62) are rotatably mounted inside the limiting groove of the activated carbon plate (61); the concave block (63) is arranged on the inner side of the sliding column (62); the top of the shielding plate (64) is hinged to the outer wall of the smoke inlet assembly (54); and the arcuate outer wall of the shielding plate (64) is fixedly connected to the concave block (63).

7. The hot air reflow soldering machine for power module processing according to claim 6, characterized in that: The top of the activated carbon plate (61) contacts the top of the inner wall of the processing assembly (3); the side of the activated carbon plate (61) close to the axis of the bearing plate (42) contacts the telescopic end of the L-shaped telescopic plate (55); a torsion spring is provided between the top of the shielding plate (64) and the interior of the smoke inlet assembly (54); and the concave block (63) is located on the movement trajectory of the sliding column (62).

8. The hot air reflow soldering machine for power module processing according to claim 7, characterized in that: The anti-scattering device (6) further comprises a sliding plate (65), a support plate (66), a U-shaped telescopic frame (67), a sliding frame (68), a transmission rod (69) and a spiral guide plate (610); the sliding plate (65) is slidably mounted on the outer wall of the activated carbon plate (61) at a side away from the L-shaped telescopic plate (55); the top of the support plate (66) is hinged to the side of the sliding plate (65) away from the activated carbon plate (61) through a torsion spring; the top of the U-shaped telescopic frame (67) is hinged to the top of the inner wall of the fixed end of the L-shaped telescopic plate (55) through a torsion spring; the sliding frame (68) is slidably mounted on the inner wall of the activated carbon plate (61) at a side away from the L-shaped telescopic plate (55); both ends of the transmission rod (69) are rotatably mounted on the inner wall of the sliding frame (68); and the inner wall of the spiral guide plate (610) is fixedly mounted on the outer wall of the transmission rod (69).

9. The hot air reflow soldering machine for power module processing according to claim 8, characterized in that: The bottom of the support plate (66) is hinged to the top of the bearing plate (42), the outer wall of the sliding frame (68) is hinged inside the telescopic end of the U-shaped telescopic frame (67), the outer wall of the transmission rod (69) is in contact with the inner wall of the activated carbon plate (61), and the transmission rod (69) is designed to be thick at both ends and thin in the center.

10. A method for using a hot air reflow soldering machine for processing a power module, using the hot air reflow soldering machine for processing a power module according to claim 9, characterized in that: The following steps are involved: S1: starting the transmission component (2) and placing the material inside the U-shaped rack (21). Then, the conveyor belt in the transmission component (2) transports the U-shaped rack (21) from the left to the inside of the processing component (3). At the same time, the heating component (32) reciprocates and slides horizontally inside the slide rail (31) to expand its range of movement and temperature uniformity. S2: When the U-shaped storage rack (21) moves to the center of the processing assembly (3), the transmission assembly (2) stops running, and the hot air gun assembly (33) heats and melts the brazing material in the material, so that the brazing material and the welding element are fully in contact with each other to complete the welding work, and then the transmission assembly (2) sends the U-shaped storage rack (21) out of the processing assembly (3); S3: When the U-shaped storage rack (21) is suspended at the center of the processing assembly (3), the electric rotating rod (41) is started. When the electric rotating rod (41) rotates, the reciprocating spiral groove on its outer wall limits the internal block of the carrier plate (42), so that the carrier plate (42) can slide downward along the outer wall of the electric rotating rod (41). At this time, the limiting rod (45) limits the carrier plate (42); S4: The load-bearing plate (42) drives the elastic telescopic rod (43) to move synchronously, and the telescopic end of the elastic telescopic rod (43) drives the pressure plate assembly (44) to move downward until the soft surface at the bottom of the pressure plate assembly (44) presses the top edge of the welding element to complete the positioning and pressing between the welding element and the mother body. At the same time, when the entire device vibrates or shakes, the soft surface at the bottom of the pressure plate assembly (44) and the elasticity of the built-in spring of the elastic telescopic rod (43) are used for buffering.

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