A solder piece alignment device and alignment method for silicon carbide module packaging

Abstract

The present invention discloses a welding piece alignment device and an alignment method for silicon carbide module packaging, which belongs to the field of silicon carbide module packaging. The welding piece alignment device for silicon carbide module packaging includes a workbench, two first rollers and two second rollers are symmetrically rotatably connected to the workbench, a plurality of protrusions are fixedly connected to the second conveyor belt, a plurality of slots cooperating with the plurality of protrusions are provided on the first conveyor belt, and a material discharge mechanism for placing welding pieces on the substrate in the groove is provided on the workbench. An alignment method includes a preparation stage, a welding piece release stage, a dust removal stage, further bonding the welding piece to the substrate, and subsequent operations. The present invention drives the first conveyor belt to run synchronously by engaging the protrusions on the second conveyor belt in the slots on the first conveyor belt when the second conveyor belt is running, so that the through holes on the first conveyor belt can always be in the same position as the grooves on the second conveyor belt, so that the welding piece can be aligned with the substrate.

Description

Technical Field

[0001] The invention relates to the technical field of silicon carbide module packaging, in particular to a welding piece alignment device for silicon carbide module packaging. Background Art

[0002] Materials with conductivity between conductors and insulators are called semiconductors. Semiconductor materials are a type of electronic materials with semiconductor properties that can be used to make semiconductor devices and integrated circuits. The current semiconductor materials have developed to the third generation, which mainly includes SiC, GaN, diamond, etc. Compared with the first and second generation semiconductor materials, the third generation semiconductor materials have the advantages of high thermal conductivity, high breakdown field strength, high saturated electron drift rate and high bonding energy. They can meet the new requirements of modern electronic technology for harsh conditions such as high temperature, high power, high voltage, high frequency and radiation resistance, and are the most promising materials in the field of semiconductor materials.

[0003] In the prior art, it is difficult to align the positions of the soldering pad and the substrate when packaging silicon carbide, and if there is too much dust during this process, it will also affect the subsequent welding. Therefore, we need a soldering pad alignment device for silicon carbide module packaging. Summary of the invention

[0004] The object of the present invention is to provide a solder piece alignment device for silicon carbide module packaging, which has the advantage of being able to facilitate the alignment of the solder piece and the substrate, and solves the problem of inconvenient alignment in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solder piece alignment device for silicon carbide module packaging, comprising a workbench, on which two first rollers and two second rollers are symmetrically rotatably connected, a first conveyor belt is transmission-connected between the two first rollers, a second conveyor belt is transmission-connected between the two second rollers, the diameter of the second rollers is smaller than that of the first rollers, a plurality of grooves for placing substrates are provided on the second conveyor belt, a plurality of through holes matching the grooves are provided on the first conveyor belt, a plurality of protrusions are fixedly connected to the second conveyor belt, a plurality of slots matching the plurality of protrusions are provided on the first conveyor belt, and a material discharge mechanism for placing solder pieces on the substrates in the grooves is provided on the workbench.

[0006] Preferably, the discharge mechanism includes a rectangular tube, to which a mounting frame is fixedly connected, and the mounting frame is fixedly connected to a workbench, and the lower part of the rectangular tube is slidably connected with a first baffle and a second baffle, and the first baffle is located on the upper part of the second baffle, and the distance between the first baffle and the second baffle is slightly larger than the unit thickness of a welding sheet.

[0007] Preferably, a connecting block is fixedly connected to the first baffle and the second baffle, an electric telescopic rod is fixedly connected to the workbench, and an output end of the electric telescopic rod is fixedly connected to the connecting block.

[0008] Preferably, the mounting frame is provided with a dust removal mechanism for removing dust from the welding piece, the dust removal mechanism includes a motor, the motor is fixedly connected to the mounting frame, the output end of the motor is fixedly connected to a drive shaft, the bottom of the drive shaft is fixedly connected to an impeller, the mounting frame is fixedly connected to a cylindrical shell, the impeller is rotatably connected in the cylindrical shell, the cylindrical shell is fixedly connected to an air outlet pipe and a dust hood, and the suction end of the dust hood faces the bottom of the rectangular tube.

[0009] Preferably, a worm wheel is rotatably connected to the mounting frame, a worm is coaxially fixedly connected to the driving shaft, the worm is meshed with the worm wheel, a driving wheel is coaxially fixedly connected to the worm wheel, a rotating shaft is rotatably connected to the workbench, a driven wheel is fixedly connected to the rotating shaft, and a belt is connected between the driving wheel and the driven wheel.

[0010] Preferably, a toothless gear is fixedly connected to the rotating shaft, and a full-tooth gear is fixedly connected to the second rotating roller close to the rotating shaft, and the full-tooth gear is intermittently meshed with the toothless gear.

[0011] Preferably, a first piston cylinder is fixedly connected to the mounting frame, a first piston rod is slidably connected inside the first piston cylinder, a pressure-sensitive switch for controlling the electric telescopic rod is provided inside the first piston cylinder, and the first piston rod intermittently abuts against the pressure-sensitive switch.

[0012] Preferably, a shift block is fixedly connected to the rotating shaft, an inclined plate is fixedly connected to the first piston rod, the shift block and the inclined plate are slidably connected, a mounting plate is fixedly connected to the rectangular cylinder, a horizontal plate is fixedly connected to the mounting plate, a second piston cylinder is fixedly connected to the horizontal plate, a second piston rod is slidably connected in the second piston cylinder, and an air pipe is fixedly connected between the second piston cylinder and the first piston cylinder.

[0013] Preferably, a pressure rod is slidably connected to the mounting plate, a tension spring is fixedly connected between the top of the pressure rod and the cross plate, the second piston rod and the pressure rod are intermittently abutted against each other, a pressure block is slidably connected to the bottom of the pressure rod, a spring is fixedly connected between the pressure block and the pressure rod, two sliding rods are fixedly connected to the pressure rod, an S-shaped groove is provided on the mounting plate, and the two sliding rods are slidably connected in the S-shaped groove.

[0014] A method for aligning a solder piece alignment device for silicon carbide module packaging, comprising the following steps:

[0015] S1: preparation stage;

[0016] Stack the solder sheets in a rectangular tube, and then place the substrate in a groove on a second conveyor belt;

[0017] S2: soldering sheet release stage;

[0018] When the second conveyor belt is running, the first conveyor belt is driven to run synchronously through the convex block, so that the through hole is always facing the groove, and then the solder sheet dropped from the rectangular tube falls into the through hole and is aligned with the substrate;

[0019] S3: dust removal stage;

[0020] Start the motor to make the impeller rotate, and then the dust hood absorbs the dust and other impurities at the bottom of the rectangular tube;

[0021] S4: further bonding the welding sheet to the substrate;

[0022] The start of the motor synchronously drives the intermittent transmission of the second conveyor belt. After a unit distance of substrate is transported, the second conveyor belt stops running, and then the pressure rod swings down to make the pressure block press the welding piece. The pressure block is slidably connected to the bottom of the pressure rod, and there is sufficient friction between the pressure block and the pressure rod, so that the pressure block can simulate the pressing action of a human hand on the welding piece.

[0023] S5: Subsequent operations;

[0024] After the soldering sheet and the substrate are aligned, subsequent operations can be performed to package the silicon carbide module.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention starts the motor to rotate the drive shaft, and the impeller on the drive shaft rotates, and then the impeller rotating in the cylindrical shell can generate a pressure difference in the cylindrical shell, and then the dust hood fixedly connected to the cylindrical shell can vacuum the lower end of the rectangular tube, so that the welding piece remains clean.

[0027] 2. In the present invention, the first baffle and the second baffle are arranged at different heights, and there is no overlap between the two in the vertical direction. When the first baffle moves away from the rectangular tube, the second baffle moves toward the rectangular tube. At this time, the second baffle supports the welding piece. When the movement of the first baffle and the second baffle is opposite to the above, the first baffle is inserted between the lowest welding piece and the second lowest welding piece, and then the second baffle no longer blocks the lowest welding piece, and a welding piece falls into the rectangular tube.

[0028] 3. In the present invention, when the pressure rod slides down, the slide bar slides in the S-shaped slide groove on the mounting plate, and then the sliding pressure rod can swing. At this time, the pressure block can swing to press the welding piece downward, simulating the pressing method of human fingers to press the welding piece, so that the position of the welding piece is corrected, and at the same time, the welding piece and the substrate are more closely fitted.

[0029] 4. In the present invention, when the second conveyor belt is running, the protrusions on the second conveyor belt move synchronously, and the protrusions on the second conveyor belt are engaged in the grooves on the first conveyor belt, so that the second conveyor belt can drive the first conveyor belt to run synchronously when it is running, so that the through holes on the first conveyor belt can always be in the same position with the grooves on the second conveyor belt, so that the welding piece can be aligned with the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the motor of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the groove of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the rectangular tube of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the pressure rod of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the S-shaped chute of the present invention.

[0036] In the figure: 1, workbench; 2, rectangular cylinder; 21, mounting frame; 22, motor; 23, drive shaft; 24. Worm; 25. Impeller; 26. Cylindrical shell; 27. Air outlet duct; 28. Dust hood; 3. Worm wheel; 31. Driving wheel; 32. Belt; 33. Driven wheel; 34. Toothless gear; 35. Rotating shaft; 351. Shifting block; 36. Full-toothed gear; 37. Second roller; 38. Second conveyor belt; 381. Bump; 39. Groove; 4. First roller; 41. First conveyor belt; 42. Through hole; 43. Electric telescopic rod; 44. Connecting block; 45. First baffle; 46. Second baffle; 5. Mounting plate; 51. Pressure rod; 52. Pressure block; 53. Spring; 54. Tension spring; 55. Cross plate; 56. Sliding rod; 57. S-shaped slide; 6. First piston cylinder; 61. First piston rod; 62. Inclined plate; 63. Air pipe; 64. Second piston cylinder; 65. Second piston rod. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0038] Embodiment 1

[0039] Reference Figure 1 , Figure 3 and Figure 4 The present invention provides a technical solution: a welding piece alignment device for silicon carbide module packaging, comprising a workbench 1, on which two first rollers 4 and two second rollers 37 are symmetrically rotatably connected, a first conveyor belt 41 is transmission-connected between the two first rollers 4, a second conveyor belt 38 is transmission-connected between the two second rollers 37, the diameter of the second rollers 37 is smaller than the first rollers 4, a plurality of grooves 39 for placing substrates are formed on the second conveyor belt 38, a plurality of through holes 42 cooperating with the grooves 39 are formed on the first conveyor belt 41, a plurality of protrusions 381 are fixedly connected to the second conveyor belt 38, a plurality of card slots cooperating with the plurality of protrusions 381 are formed on the first conveyor belt 41, and a material discharge mechanism for placing welding pieces on the substrates in the grooves 39 is provided on the workbench 1.

[0040] The welding sheets are stacked in the rectangular tube 2. When the second conveyor belt 38 is running, the protrusion 381 on the second conveyor belt 38 moves synchronously, and the protrusion 381 on the second conveyor belt 38 is clamped in the groove on the first conveyor belt 41. Therefore, when the second conveyor belt 38 is running, it can drive the first conveyor belt 41 to run synchronously, so that the through hole 42 on the first conveyor belt 41 can always be in the same position with the groove 39 on the second conveyor belt 38.

[0041] Furthermore, the discharge mechanism includes a rectangular tube 2, to which a mounting frame 21 is fixedly connected, and the mounting frame 21 is fixedly connected to the workbench 1. The lower part of the rectangular tube 2 is slidably connected with a first baffle 45 and a second baffle 46. The first baffle 45 is located at the upper part of the second baffle 46, and the distance between the first baffle 45 and the second baffle 46 is slightly larger than the unit thickness of a welding piece.

[0042] The first baffle 45 and the second baffle 46 are set at different heights and there is no overlap between the two in the vertical direction. Therefore, when the first baffle 45 moves away from the rectangular tube 2, the second baffle 46 moves toward the rectangular tube 2. At this time, the second baffle 46 supports the welding piece. When the movement of the first baffle 45 and the second baffle 46 is opposite to the above, the first baffle 45 is inserted between the lowest welding piece and the second lowest welding piece, and then the second baffle 46 no longer blocks the lowest welding piece, and then a welding piece falls into the rectangular tube 2.

[0043] Furthermore, a connecting block 44 is fixedly connected to the first baffle 45 and the second baffle 46 , an electric telescopic rod 43 is fixedly connected to the workbench 1 , and an output end of the electric telescopic rod 43 is fixedly connected to the connecting block 44 .

[0044] The substrate is placed in the groove 39 on the second conveyor belt 38, and the electric telescopic rod 43 is extended and retracted once. At this time, the connecting block 44 fixedly connected to the output end of the electric telescopic rod 43 drives the first baffle 45 and the second baffle 46 to slide, thereby releasing one of the welding pieces in the rectangular tube 2 onto the substrate at the lower part of the rectangular tube 2.

[0045] Embodiment 2

[0046] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 On the basis of the first embodiment, further, a dust removal mechanism for removing dust from the welding piece is provided on the mounting frame 21, and the dust removal mechanism includes a motor 22, the motor 22 is fixedly connected to the mounting frame 21, the output end of the motor 22 is fixedly connected to a drive shaft 23, the bottom of the drive shaft 23 is fixedly connected to an impeller 25, the mounting frame 21 is fixedly connected to a cylindrical shell 26, the impeller 25 is rotatably connected in the cylindrical shell 26, the cylindrical shell 26 is fixedly connected to an air outlet pipe 27 and a dust hood 28, and the suction end of the dust hood 28 faces the bottom of the rectangular tube 2.

[0047] Starting the motor 22 causes the drive shaft 23 to rotate, and the worm 24 and the impeller 25 on the drive shaft 23 rotate synchronously. The impeller 25 rotating in the cylindrical shell 26 can generate a pressure difference in the cylindrical shell 26, and the dust hood 28 fixedly connected to the cylindrical shell 26 can vacuum the lower end of the rectangular tube 2, so that the welding piece remains clean, and the sucked air and dust are discharged through the air outlet pipe 27.

[0048] Furthermore, a worm wheel 3 is rotatably connected to the mounting frame 21, a worm 24 is coaxially fixedly connected to the driving shaft 23, the worm 24 meshes with the worm wheel 3, a driving wheel 31 is coaxially fixedly connected to the worm wheel 3, a rotating shaft 35 is rotatably connected to the workbench 1, a driven wheel 33 is fixedly connected to the rotating shaft 35, and a belt 32 is transmission-connected between the driving wheel 31 and the driven wheel 33.

[0049] When the worm 24 rotates, it can drive the worm wheel 3 meshing therewith to rotate synchronously, and then the driving wheel 31 on the worm wheel 3 rotates. At this time, the driving wheel 31 drives the driven wheel 33 to rotate through the belt 32, and the driven wheel 33 drives the rotating shaft 35 to rotate.

[0050] Furthermore, a toothless gear 34 is fixedly connected to the rotating shaft 35 , and a full-tooth gear 36 is fixedly connected to the second rotating roller 37 close to the rotating shaft 35 . The full-tooth gear 36 is intermittently meshed with the toothless gear 34 .

[0051] The toothless gear 34 on the rotating shaft 35 is intermittently meshed with the full-tooth gear 36 so that the full-tooth gear 36 drives the second rotating roller 37 to rotate intermittently, and then the second rotating roller 37 drives the second conveyor belt 38 to transport intermittently.

[0052] Furthermore, a first piston cylinder 6 is fixedly connected to the mounting frame 21, a first piston rod 61 is slidably connected inside the first piston cylinder 6, a pressure-sensitive switch for controlling the electric telescopic rod 43 is provided inside the first piston cylinder 6, and the first piston rod 61 intermittently abuts against the pressure-sensitive switch.

[0053] As the running base of the second conveyor belt 38 gradually moves toward the bottom of the rectangular cylinder 2, the shift block 351 on the rotating shaft 35 is located on the opposite side of the teeth on the toothless gear 34. When the rotating shaft 35 rotates until the second conveyor belt 38 stops running, the shift block 351 contacts the inclined plate 62, so that the first piston rod 61 is pushed. At this time, the first piston rod 61 squeezes the pressure-sensitive switch in the first piston cylinder 6, and then the electric telescopic rod 43 is extended and retracted.

[0054] Embodiment 3

[0055] Reference Figure 1 , Figure 5 and Figure 6 On the basis of the second embodiment, further, a shift block 351 is fixedly connected to the rotating shaft 35, an inclined plate 62 is fixedly connected to the first piston rod 61, the shift block 351 is slidably connected to the inclined plate 62, a mounting plate 5 is fixedly connected to the rectangular cylinder 2, a transverse plate 55 is fixedly connected to the mounting plate 5, a second piston cylinder 64 is fixedly connected to the transverse plate 55, a second piston rod 65 is slidably connected in the second piston cylinder 64, and an air pipe 63 is fixedly connected between the second piston cylinder 64 and the first piston cylinder 6.

[0056] When the second conveyor belt 38 stops running, there are two grooves 39 on the second conveyor belt 38, one is located at the lower part of the rectangular tube 2, and the other is located at the lower part of the pressure rod 51. The groove 39 at the lower part of the rectangular tube 2 is placed with a welding piece, and the welding piece on the substrate in the groove 39 at the lower part of the pressure rod 51 is pressed by the pressure block 52 to correct the position and make the welding piece and the substrate fit better. When the first piston rod 61 slides into the first piston cylinder 6, the air in the first piston cylinder 6 is transported to the second piston cylinder 64 through the air pipe 63, and then the second piston rod 65 extends out and presses the pressure rod 51, and the pressure rod 51 slides down at this time.

[0057] Furthermore, a pressure rod 51 is slidably connected to the mounting plate 5, a tension spring 54 is fixedly connected between the top of the pressure rod 51 and the cross plate 55, the second piston rod 65 intermittently abuts against the pressure rod 51, a pressure block 52 is slidably connected to the bottom of the pressure rod 51, a spring 53 is fixedly connected between the pressure block 52 and the pressure rod 51, two sliding rods 56 are fixedly connected to the pressure rod 51, an S-shaped slide groove 57 is provided on the mounting plate 5, and the two sliding rods 56 are both slidably connected in the S-shaped slide groove 57.

[0058] When the pressure rod 51 slides down, the slide bar 56 slides in the S-shaped slide groove 57 on the mounting plate 5, and then the pressed rod 51 that slides down can swing. At this time, the pressure block 52 can swing to press the welding piece down, simulating the pressing method of human fingers to press the welding piece, so that the position of the welding piece is corrected, and at the same time, the welding piece and the substrate are more closely fitted.

[0059] Embodiment 4

[0060] A method for aligning a solder piece alignment device for silicon carbide module packaging, comprising the following steps:

[0061] S1: preparation stage;

[0062] The solder sheets are stacked in the rectangular tube 2, and the substrate is placed in the groove 39 on the second conveyor belt 38;

[0063] S2: soldering sheet release stage;

[0064] When the second conveyor belt 38 is running, the first conveyor belt 41 is driven to run synchronously through the protrusion 381, so that the through hole 42 is always facing the groove 39, and then the solder sheet dropped from the rectangular tube 2 falls into the through hole 42 and is aligned with the substrate;

[0065] S3: dust removal stage;

[0066] The motor 22 is started to rotate the impeller 25, and then the dust collecting hood 28 absorbs the dust and other impurities at the bottom of the rectangular tube 2;

[0067] S4: further bonding the welding sheet to the substrate;

[0068] The start of the motor 22 synchronously drives the intermittent transmission of the second conveyor belt 38. After a unit distance of substrates is transported, the second conveyor belt 38 stops running, and then the pressure rod 51 swings down to make the pressure block 52 press the soldering sheet. The pressure block 52 is slidably connected to the bottom of the pressure rod 51, and there is sufficient friction between the pressure block 52 and the pressure rod 51, so that the pressure block 52 can simulate the pressing action of a human hand on the soldering sheet.

[0069] S5: Subsequent operations;

[0070] After the soldering sheet and the substrate are aligned, subsequent operations can be performed to package the silicon carbide module.

[0071] Working principle: When using the welding piece alignment device for silicon carbide module packaging, the welding pieces are stacked in the rectangular tube 2, and the motor 22 is started to rotate the driving shaft 23. At this time, the worm 24 and the impeller 25 on the driving shaft 23 rotate synchronously, and then the impeller 25 rotating in the cylindrical shell 26 can generate a pressure difference in the cylindrical shell 26, and then the dust hood 28 fixedly connected to the cylindrical shell 26 can vacuum the lower end of the rectangular tube 2, so that the welding pieces are kept clean, and the sucked air and dust are discharged through the air outlet pipe 27;

[0072] When the worm 24 rotates, it can drive the worm wheel 3 meshing therewith to rotate synchronously, and then the driving wheel 31 on the worm wheel 3 rotates. At this time, the driving wheel 31 drives the driven wheel 33 to rotate through the belt 32, and the driven wheel 33 drives the rotating shaft 35 to rotate. The toothless gear 34 on the rotating shaft 35 is intermittently meshed with the full-tooth gear 36, so that the full-tooth gear 36 drives the second roller 37 to rotate intermittently, and then the second roller 37 drives the second conveyor belt 38 to transport intermittently;

[0073] When the second conveyor belt 38 is running, the protrusion 381 on the second conveyor belt 38 moves synchronously, and the protrusion 381 on the second conveyor belt 38 is clamped in the clamping groove on the first conveyor belt 41, so that the second conveyor belt 38 can drive the first conveyor belt 41 to run synchronously when running, so that the through hole 42 on the first conveyor belt 41 can always be in the same position with the groove 39 on the second conveyor belt 38;

[0074] The substrate is placed in the groove 39 on the second conveyor belt 38. As the second conveyor belt 38 runs, the substrate gradually moves toward the bottom of the rectangular tube 2. The shift block 351 on the rotating shaft 35 is located on the opposite side of the teeth on the toothless gear 34. When the rotating shaft 35 rotates until the second conveyor belt 38 stops running, the shift block 351 contacts the inclined plate 62, so that the first piston rod 61 is pushed. At this time, the first piston rod 61 squeezes the pressure-sensitive switch in the first piston cylinder 6, and then the electric telescopic rod 43 is extended and retracted. At this time, the connecting block 44 fixedly connected to the output end of the electric telescopic rod 43 drives the first baffle 45 and the second baffle 46 to slide, so that one of the welding pieces in the rectangular tube 2 is released to the substrate at the lower part of the rectangular tube 2.

[0075] The first baffle 45 and the second baffle 46 are set at different heights and there is no overlap between the two in the vertical direction. Therefore, when the first baffle 45 moves away from the rectangular tube 2, the second baffle 46 moves toward the rectangular tube 2. At this time, the second baffle 46 supports the welding piece. When the movement of the first baffle 45 and the second baffle 46 is opposite to the above, the first baffle 45 is inserted between the lowest welding piece and the second lowest welding piece, and then the second baffle 46 no longer blocks the lowest welding piece, and then a welding piece falls into the rectangular tube 2.

[0076] When the second conveyor belt 38 stops running, there are two grooves 39 on the second conveyor belt 38, one is located at the lower part of the rectangular tube 2, and the other is located at the lower part of the pressing rod 51. The welding piece is placed in the groove 39 at the lower part of the rectangular tube 2, and the welding piece on the substrate in the groove 39 at the lower part of the pressing rod 51 is pressed by the pressing block 52 to correct the position and make the welding piece and the substrate fit more closely.

[0077] When the first piston rod 61 slides into the first piston cylinder 6, the air in the first piston cylinder 6 is transported to the second piston cylinder 64 through the air pipe 63, and then the second piston rod 65 extends and presses the pressure rod 51. At this time, the pressure rod 51 slides down. When the pressure rod 51 slides down, the slide bar 56 slides in the S-shaped slide groove 57 on the mounting plate 5, and then the sliding pressure rod 51 can swing. At this time, the pressure block 52 can swing to press the welding piece down, simulating the way of pressing the welding piece by human fingers, so that the position of the welding piece is corrected, and at the same time, the welding piece and the substrate are more closely attached. The tension spring 54 allows the pressure rod 51 to slide upward and reset, and the spring 53 allows the pressure block 52 to be directly below the bottom of the pressure rod 51.

[0078] After the solder tabs are aligned on the substrate, subsequent processing operations can be performed.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solder piece alignment device for silicon carbide module packaging, comprising a workbench (1), characterized in that: The workbench (1) is symmetrically rotatably connected to two first rollers (4) and two second rollers (37); a first conveyor belt (41) is transmission-connected between the two first rollers (4); a second conveyor belt (38) is transmission-connected between the two second rollers (37); the diameter of the second rollers (37) is smaller than that of the first rollers (4); a plurality of grooves (39) for placing substrates are formed on the second conveyor belt (38); a plurality of through holes (42) cooperating with the grooves (39) are formed on the first conveyor belt (41); a plurality of protrusions (381) are fixedly connected to the second conveyor belt (38); a plurality of slots cooperating with the plurality of protrusions (381) are formed on the first conveyor belt (41); and a material discharge mechanism for placing solder sheets on the substrates in the grooves (39) is provided on the workbench (1); The discharge mechanism comprises a rectangular cylinder (2), a mounting frame (21) is fixedly connected to the rectangular cylinder (2), a dust removal mechanism for removing dust from the welding piece is provided on the mounting frame (21), the dust removal mechanism comprises a motor (22), the motor (22) is fixedly connected to the mounting frame (21), an output end of the motor (22) is fixedly connected to a drive shaft (23), a bottom of the drive shaft (23) is fixedly connected to an impeller (25), a cylindrical shell (26) is fixedly connected to the mounting frame (21), the impeller (25) is rotatably connected in the cylindrical shell (26), an air outlet pipe (27) and a dust hood (28) are fixedly connected to the cylindrical shell (26), and an absorption end of the dust hood (28) faces the bottom of the rectangular cylinder (2); A worm wheel (3) is rotatably connected to the mounting frame (21), a worm (24) is coaxially fixedly connected to the driving shaft (23), the worm (24) meshes with the worm wheel (3), a driving wheel (31) is coaxially fixedly connected to the worm wheel (3), a rotating shaft (35) is rotatably connected to the workbench (1), a driven wheel (33) is fixedly connected to the rotating shaft (35), and a belt (32) is connected between the driving wheel (31) and the driven wheel (33); A toothless gear (34) is fixedly connected to the rotating shaft (35), and a full-tooth gear (36) is fixedly connected to a second rotating roller (37) close to the rotating shaft (35), and the full-tooth gear (36) is intermittently meshed with the toothless gear (34); A first piston cylinder (6) is fixedly connected to the mounting frame (21), a first piston rod (61) is slidably connected inside the first piston cylinder (6), a pressure-sensitive switch for controlling the electric telescopic rod (43) is provided inside the first piston cylinder (6), and the first piston rod (61) and the pressure-sensitive switch are intermittently abutted against each other; The rotating shaft (35) is fixedly connected with a shifting block (351), the first piston rod (61) is fixedly connected with an inclined plate (62), the shifting block (351) and the inclined plate (62) are slidably connected, the rectangular cylinder (2) is fixedly connected with a mounting plate (5), the mounting plate (5) is fixedly connected with a transverse plate (55), the transverse plate (55) is fixedly connected with a second piston cylinder (64), the second piston rod (65) is slidably connected in the second piston cylinder (64), and an air pipe (63) is fixedly connected between the second piston cylinder (64) and the first piston cylinder (6); A pressure rod (51) is slidably connected to the mounting plate (5), a tension spring (54) is fixedly connected between the top of the pressure rod (51) and the cross plate (55), the second piston rod (65) and the pressure rod (51) are intermittently abutted, a pressure block (52) is slidably connected to the bottom of the pressure rod (51), a spring (53) is fixedly connected between the pressure block (52) and the pressure rod (51), two sliding rods (56) are fixedly connected to the pressure rod (51), an S-shaped sliding groove (57) is provided on the mounting plate (5), and the two sliding rods (56) are slidably connected in the S-shaped sliding groove (57).

2. The solder piece alignment device for silicon carbide module packaging according to claim 1, characterized in that: The mounting frame (21) is fixedly connected to the workbench (1); the lower part of the rectangular tube (2) is slidably connected to a first baffle (45) and a second baffle (46); the first baffle (45) is located above the second baffle (46); and the spacing between the first baffle (45) and the second baffle (46) is slightly greater than the unit thickness of a welding sheet.

3. The solder piece alignment device for silicon carbide module packaging according to claim 2, characterized in that: A connecting block (44) is fixedly connected to the first baffle plate (45) and the second baffle plate (46); an electric telescopic rod (43) is fixedly connected to the workbench (1); and an output end of the electric telescopic rod (43) is fixedly connected to the connecting block (44).

4. An alignment method for a solder piece alignment device for silicon carbide module packaging according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: preparation stage; Stacking the welding sheets in a rectangular tube (2), and then placing the substrate in a groove (39) on a second conveyor belt (38); S2: soldering sheet release stage; When the second conveyor belt (38) is running, the first conveyor belt (41) is driven to run synchronously through the protrusion (381), so that the through hole (42) is always directly opposite the groove (39), and the soldering sheet dropped from the rectangular tube (2) falls exactly into the through hole (42) and is aligned with the substrate; S3: dust removal stage; Starting the motor (22) causes the impeller (25) to rotate, and then the dust collecting hood (28) absorbs the dust at the bottom of the rectangular tube (2); S4: further bonding the welding sheet to the substrate; The start of the motor (22) synchronously drives the intermittent transmission of the second conveyor belt (38). After a unit distance of substrates are transported, the second conveyor belt (38) stops running, and then the pressure rod (51) swings down to allow the pressure block (52) to press the soldering sheet. The pressure block (52) is slidably connected to the bottom of the pressure rod (51), and there is sufficient friction between the pressure block (52) and the pressure rod (51), so that the pressure block (52) can simulate the pressing action of a human hand on the soldering sheet. S5: Subsequent operations; After the soldering sheet and the substrate are aligned, subsequent operations can be performed to package the silicon carbide module.

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