A soldering apparatus and method for inductors

Abstract

The application relates to the technical field of inductor welding, in particular to an inductor welding device and method, which comprises a welding machine body provided with a feeding mechanical arm, a placing groove for placing a PCB board is arranged above the welding machine body, and a welding auxiliary mechanism is arranged on the welding machine body directly above the placing groove; the welding auxiliary mechanism comprises sleeves, cutting cylinders, floating members and guide plates; the sleeves are provided with two groups and are matched with the number of pins on the inductor body to be welded; the two sleeves are connected through the floating members; the cutting cylinders are sealingly rotatable and are connected with the lower ends of the sleeves; and the inner walls of the cutting cylinders are rotatably provided with cutting plates; the application sets up multistage guiding constraints on the path under the inductor pins, so that the pins can be limited in stable space tracks before being inserted into the through holes, the phenomenon that the pin ends repeatedly try around the through hole mouths is reduced, and the effect that the pins are smoothly clamped with the PCB is achieved.

Description

Technical Field

[0001] This invention relates to the field of inductor welding technology, and more particularly to an inductor welding equipment and method. Background Technology

[0002] Inductors, as commonly used passive devices, are widely used in circuits for power filtering, energy storage conversion, and electromagnetic compatibility. In some applications, inductors adopt a plug-in pin structure, which achieves electrical and mechanical connection by inserting the pins into the through holes of a printed circuit board (PCB) and soldering them. In current production, the soldering of inductors to PCBs usually includes processes such as "pin insertion into through holes - positioning and holding - soldering and curing". The stability and consistency of pin insertion into through holes directly affect the soldering quality and production cycle.

[0003] However, since inductor pins are usually made of hard or semi-hard metal, when the pins are inserted into through holes on the PCB, the pin tip may repeatedly probe around the hole opening due to slight deviations between the pin and the through hole, resulting in prolonged insertion time or even jamming and inability to insert. For automated feeding robotic arms or insertion mechanisms, a sudden increase in insertion resistance can easily cause shutdown alarms or cause cycle time fluctuations. Summary of the Invention

[0004] The purpose of this invention is to solve the problem in the prior art that inductor pins are difficult to insert smoothly into the through holes of the circuit board, and to propose an inductor welding device and method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a welding equipment and method for inductors, comprising a welding machine body equipped with a loading robotic arm, a storage slot for placing PCB boards above the welding machine body, and further comprising:

[0006] A welding auxiliary mechanism is mounted on the welding machine body located directly above the placement trough. The welding auxiliary mechanism includes a sleeve, a cutting cylinder, a floating component, and a guide plate. The sleeve has two sets adapted to the number of pins on the inductor body to be welded. The two sleeves are connected by the floating component. The cutting cylinder is sealed, rotatable, and connected to the lower end of the sleeve. The inner wall of the cutting cylinder is rotatably provided with a cutting plate. The guide plate is located between the lower end of the cutting cylinder and the upper part of the PCB board and is assembled and connected with the floating component. The guide plate has a guide hole. The lower end of the pin vertically passes through the sleeve, the cutting cylinder, and the guide hole and is inserted into a pre-reserved through hole on the PCB board. The welding auxiliary mechanism is a detachable symmetrical structure.

[0007] The pressure plate is assembled and connected to the welding machine body via a first cylinder, and the pressure plate is located directly above the inductor body.

[0008] Specifically, the upper end of the sleeve is connected to an expansion tube, which is wide at the top and narrow at the bottom. The inner diameter of the upper end of the expansion tube is more than twice the diameter of the pin, and the inner wall of the sleeve is adapted to the diameter of the pin.

[0009] Preferably, the lower end of the pin is first moved down into the sleeve through the expansion tube. There is no need to precisely insert the pin into the sleeve. The pin is gradually introduced into the sleeve through the expansion tube so that the spacing between the two sets of pins gradually becomes consistent with the spacing between the through holes.

[0010] Specifically, the cutting cylinder is a cylindrical structure with the upper and lower parts connected. The cutting plate is provided with multiple inverted triangular plate structures, each of which is arc-shaped. The multiple cutting plates are arranged in a ring and combined to form a hemispherical structure. The upper end of the cutting plate is rotatably connected to the inner wall of the cutting cylinder through a rotating shaft. The inner arc surface above the cutting plate is provided with a blade.

[0011] Preferably, when all the cutting plates are combined into a hemispherical structure in a closed state, the lower end of the pin cannot penetrate the cutting cylinder. Instead, the lower end of the pin abuts against the top of the hemispherical cutting plate combination. At this time, the cutting cylinder is rotated as a whole, and the cutting plates on the inner wall rotate relative to the pin, which can achieve the cutting of the lower end of the pin into a chamfer state, and facilitate the smooth insertion of the lower end of the pin into the through hole of the PCB board.

[0012] Specifically, a first magnetic sheet is provided on the outer arc surface below the cutting plate, and a second magnetic sheet is provided on the inner wall of the cutting cylinder, which is attracted to the first magnetic sheet. An assembly groove is provided on one side of the cutting plate, and an insert block is slidably provided in the assembly groove by a first spring. A slot that fits into the insert block is provided on the other side of the cutting plate. A second magnetic block is provided on the insert block, and a first magnetic block is provided in the assembly groove, which is attracted to the second magnetic block. The first magnetic block and the first magnetic sheet are an integral structure and are electrically connected to an external power source. The inner wall of the cutting cylinder is assembled and connected to the outer arc surface of the cutting plate by a second spring.

[0013] Preferably, in the initial state, the first magnetic sheet is de-energized from the external power supply, and all the cutting plates converge toward the center of the cutting cylinder under the pushing action of the second spring, forming a hemispherical structure.

[0014] Specifically, the lower end of the cutting cylinder is provided with a fixing ring, the inner wall of the fixing ring is provided with a rubber layer, the rubber layer is a center-upward protrusion mechanism and does not contact the cutting plate, a cross groove is opened at the center of the rubber layer, a dust removal pipe is connected to the side wall of the fixing ring, a fan is provided on the welding machine body, and the end of the dust removal pipe away from the fixing ring is sealed and connected to the air inlet of the fan.

[0015] Preferably, the fixing ring and the rubber layer cooperate to collect the debris cut off from the lower end of the pin by the cutting plate. The debris can fall onto the rubber layer. The fan drives the dust removal pipe to suck away the debris that falls from the rubber layer. When the pin extends downward through the cutting cylinder and enters the fixing ring, it can push the rubber layer as it continues to move downward, so that the lower end of the pin pushes open the cross groove in the middle of the rubber layer and passes through the fixing ring to move downward.

[0016] Specifically, an annular toothed groove is formed at the center of the outer wall of the cutting cylinder, and a toothed plate is engaged on the annular toothed groove. The two ends of the toothed plate are respectively engaged with the outer sides of the two cutting cylinders. The toothed plate is slidably disposed on one side of the floating component. A gear is rotatably disposed on the outer side of the floating component. A strip-shaped groove is formed at the center of the toothed plate, and a rack is provided above and below the strip-shaped groove to engage with the gear. The gear is driven to rotate by a motor.

[0017] Preferably, the gear has a small number of tooth blocks. When the motor drives the gear to rotate, the tooth blocks on the gear do not mesh with the upper and lower racks at the same time. When the last tooth block on the gear separates from the last tooth block of the upper rack, the first tooth block at the other end of the gear meshes with the first tooth block at the same end of the lower rack. When the gear meshes with the upper or lower rack respectively, the gear achieves the effect of reciprocating movement relative to the rack groove. The gear is fixed in position relative to the floating part, which can achieve the left and right reciprocating movement of the gear plate, thereby driving the cutting cylinder to rotate reciprocally. The internal cutting plate reciprocates cutting the lower end of the pin.

[0018] Specifically, the combination of the expander, sleeve, cutting cylinder, fixing ring, cutting plate, floating component, and guide plate are all centrally symmetrical structures. The two ends of the floating component are respectively equipped with second cylinders through brackets. The end face of the second cylinder is assembled and connected to the welding machine body. An outer ring is provided on the outer side of the rubber layer. Half of the outer ring is fixedly connected to half of the fixing ring. The inner side of the other half of the fixing ring is provided with a limiting groove. The other half of the outer ring is engaged with the limiting groove. The opposite faces of the two sets of expander, sleeve, cutting cylinder, fixing ring, floating component, and guide plate are respectively engaged with the groove by a locking block.

[0019] Preferably, before soldering, the PCB board is placed on the storage slot, and then the second cylinder is driven to bring the two half-groups of soldering auxiliary mechanisms closer together and merge them. The pins of the inductor body are placed in the two sleeves, and the lower corners of the two groups of pins are rounded and aligned by the cutting cylinder. Then, the pins are inserted into the PCB board through the guide plate. After the two half-groups of soldering auxiliary mechanisms are separated, the pins are soldered to the through holes of the PCB board.

[0020] Specifically, the floating component includes a main frame and an inner frame. The two ends of the main frame and the inner frame are respectively assembled and connected to two sleeves. The other end of the inner frame is provided with an end block. The main frame has a floating groove. The end block is slidably disposed in the floating groove. The two ends of the end block are respectively assembled and connected to the two ends of the floating groove by a third spring. The main frame is assembled and connected to the guide plate at the bottom. The guide plate has multiple limiting angles at the bottom, and the height of the limiting angles is 0.5mm-1mm.

[0021] Preferably, the floating component is designed to accommodate minor errors, and the lower end of the limiting angle is placed directly in the empty space around the through hole on the PCB board to support the guide plate and to allow space for movement between the guide plate and the PCB board.

[0022] Specifically, multiple right-angle clamps are provided at equal intervals on the lower edge of the pressure plate. The right-angle ends of the right-angle clamps are rotatably connected to the pressure plate. Both ends of the right-angle clamps are provided with buffer pads. The upper end of the right-angle clamps is assembled and connected to the pressure plate through a fourth spring.

[0023] After the inductor body is placed on the welding auxiliary mechanism by the loading robot arm, the pressure plate moves down. The upper end of the right-angle clamp first contacts the upper end of the inductor body. As it continues to move down, the upper end of the inductor body pushes against the upper end of the right-angle clamp and causes the fourth spring to contract, causing the right-angle clamp to gradually become perpendicular to the pressure plate. The lower end of the right-angle clamp gradually approaches the inductor body and clamps and limits the side wall of the inductor body, ensuring that the position of the inductor body is offset when the pressure plate moves down, thus affecting the insertion effect of the pins.

[0024] On the other hand, the present invention provides a welding method for an inductor, comprising the following steps;

[0025] Step S1: Use the loading robotic arm to hold the PCB board to be soldered and place it stably in the storage slot. Simultaneously drive the extension of the two sets of second cylinders to push the two half sets of soldering auxiliary mechanisms closer and stably engage. Use the loading robotic arm again to hold the inductor body to be soldered so that its two sets of pins are inserted into the two sleeves respectively.

[0026] Step S2: Drive the first cylinder to extend, causing the pressure plate to move down. The upper end of the inductor body pushes the upper end of the right-angle clamp below the pressure plate, causing the fourth spring to contract and causing the right-angle clamp to gradually become perpendicular to the pressure plate. The lower end of the right-angle clamp gradually approaches the inductor body and clamps and limits the side wall of the inductor body. The pressure plate continues to move down, pushing the inductor body until the lower end of the pin is inside the cutting cylinder.

[0027] Step S3: The lower end of the pin abuts against the inner arc surface of the hemispherical cutting plate assembly, driving the motor to rotate the gear, which in turn drives the toothed plate to move back and forth. Since the two ends of the toothed plate mesh with the outer sides of the two cutting cylinders respectively, the two cutting cylinders can be driven to rotate back and forth synchronously. The blade on the inner arc surface of the cutting plate is used to cut the lower end of the pin into a chamfer shape.

[0028] Step S4: The cutting process drives the fan to discharge the debris in the space between the cutting cylinder and the fixed ring through the dust removal pipe;

[0029] Step S5: After the cutting is completed, the first magnetic sheet is electrically connected to the external power supply. The first magnetic sheet generates magnetism and attracts the second magnetic sheet to each other, which drives the cutting plate with the first magnetic sheet to move towards the inner wall of the cutting cylinder. The magnetism generated by the first magnetic block after being energized can attract the second magnetic block and shrink it in the assembly groove. At this time, the adjacent cutting plates are separated and can rotate freely around the shaft to fit against the inner wall of the cutting cylinder.

[0030] Step S6: Continue to push the pressure plate down, and the two pins simultaneously pass through the rubber layer on the cutting cylinder and the fixing ring, pass down through the guide hole on the guide plate in sequence, and are precisely inserted into the through hole on the PCB board;

[0031] Step S7: The two sets of second cylinders retract, the two half sets of welding auxiliary mechanisms separate, and under the limit of the right angle clamp under the pressure plate, the inductor body and its pins inserted into the through hole can remain stable. At this time, the welding head on the welding machine body is used to weld the pins and the through hole.

[0032] Step S8: After welding is completed and cooled, the first cylinder is retracted to separate the pressure plate from the inductor body. The welding completed inductor body and PCB board are then unloaded using a loading robotic arm.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. This invention sets up multi-level guiding constraints on the downward path of the inductor pins, confining the pins to a stable spatial trajectory before insertion into the via, reducing the phenomenon of pin ends repeatedly probing around the via opening. Simultaneously, a floating compensation structure absorbs minor deviations between the pin spacing and the PCB via spacing, avoiding the jamming problem of "one via aligned, the other on top" caused by tolerance accumulation. This increases the probability of two pins entering the via simultaneously without relying on complex feedback control, reducing insertion force peaks and downtime risks during automated feeding / insertion processes, and improving the stability of the insertion cycle.

[0035] 2. This invention performs uniform end-face treatment on the pin ends before insertion into the through-hole, ensuring that the lower ends of both pins achieve a consistent end-face shape and height before insertion. This reduces problems such as scratching the hole opening and damaging the copper plating layer caused by end burrs, sharp corner eccentricity, or inclined cuts. Furthermore, by creating a more favorable shape for pin insertion, it reduces the peak local resistance at the moment of insertion and minimizes the tendency for the body to deflect due to single-pin insertion. The stable and consistent end-face shape also improves the repeatability of subsequent soldering wetting and solder creep, reducing soldering quality risks such as insufficient hole filling and fluctuations in solder joint appearance.

[0036] 3. This solution applies controllable pressure and lateral restraint to the inductor body during the pin insertion process, ensuring the inductor maintains a stable posture during insertion into the through hole and subsequent soldering stages. This prevents tipping, displacement, or pin misalignment within the hole caused by the device's own weight, springback, or external forces during the soldering process. Especially after the soldering auxiliary structure is removed, the pressure plate continuously maintains the relative position stability between the inductor and the PCB, significantly reducing the probability of cold solder joints, bridging, and post-soldering stress concentration. This improves the mechanical strength and long-term reliability of the solder joints, making it suitable for the continuous operation requirements of automated soldering production lines. Attached Figure Description

[0037] Figure 1 This is a perspective view of the present invention.

[0038] Figure 2 This is a schematic diagram of the welding auxiliary mechanism of the present invention.

[0039] Figure 3 This is an exploded view of the welding auxiliary mechanism of the present invention.

[0040] Figure 4 This is a schematic diagram of the welding auxiliary mechanism of the present invention.

[0041] Figure 5 This is a schematic diagram of the closed state of the cutting plate of the present invention.

[0042] Figure 6 This is a schematic diagram of the cutting plate in its unfolded state according to the present invention.

[0043] Figure 7 This is a schematic diagram of the cutting plate structure of the present invention.

[0044] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point A in the middle.

[0045] Figure 9 This is a schematic diagram of the gear and gear plate position structure of the present invention.

[0046] Figure 10 This is a schematic diagram of the pressure plate and right-angle clamp structure of the present invention.

[0047] In the diagram: 1. Loading robotic arm; 2. Welding machine body; 3. PCB board; 311. Through hole; 4. Storage slot; 511. Sleeve; 512. Cutting cylinder; 513. Floating component; 5131. Main frame; 5132. Inner frame; 5133. End block; 5134. Floating slot; 5135. Third spring; 5136. Limiting angle; 514. Guide plate; 5141. Guide hole; 515. Cutting plate; 521. Rotating shaft; 522. Blade; 531. First magnetic plate; 532. Second magnetic plate; 533. Assembly slot; 534. First spring; 535. Insert block; 536. Slot; 5 37. Second magnetic block; 538. First magnetic block; 539. Second spring; 541. Fixing ring; 542. Rubber layer; 543. Cross groove; 544. Dust removal pipe; 545. Fan; 551. Annular toothed groove; 552. Toothed plate; 553. Gear; 554. Strip groove; 555. Rack; 556. Motor; 561. Bracket; 562. Second cylinder; 563. Outer ring; 564. Limiting groove; 6. Inductor body; 611. Pin; 711. Pressure plate; 712. First cylinder; 721. Right angle clamp; 722. Buffer pad; 723. Fourth spring; 811. Expanding tube. Detailed Implementation

[0048] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0049] like Figures 1 to 10 The welding equipment and method for an inductor shown includes a welding machine body 2 equipped with a loading robotic arm 1, a storage slot 4 for placing a PCB board 3 above the welding machine body 2, and further includes:

[0050] The welding auxiliary mechanism is located on the welding machine body 2, which is directly above the storage trough 4. The welding auxiliary mechanism includes a sleeve 511, a cutting cylinder 512, a floating component 513, and a guide plate 514. The sleeve 511 has two sets and is adapted to the number of pins 611 on the inductor body 6 to be welded. The two sleeves 511 are connected by the floating component 513. The cutting cylinder 512 is sealed, rotates, and is connected to the lower end of the sleeve 511. The inner wall of the cutting cylinder 512 is rotatably provided with a cutting plate 515. The guide plate 514 is located between the lower end of the cutting cylinder 512 and the upper part of the PCB board 3 and is assembled and connected with the floating component 513. The guide plate 514 has a guide hole 5141. The lower end of the pin 611 vertically passes through the sleeve 511, the cutting cylinder 512, and the guide hole 5141 and is inserted into the reserved through hole 311 on the PCB board 3. The welding auxiliary mechanism is a detachable symmetrical structure.

[0051] The pressure plate 711 is assembled and connected to the welding machine body 2 via the first cylinder 712, and the pressure plate 711 is located directly above the inductor body 6.

[0052] The upper end of the sleeve 511 is connected to an expansion tube 811. The expansion tube 811 is designed to be wider at the top and narrower at the bottom. The inner diameter of the upper end of the expansion tube 811 is more than twice the diameter of the pin 611. The inner wall of the sleeve 511 is adapted to the diameter of the pin 611.

[0053] In this process, the lower end of pin 611 is first moved down through expansion tube 811 into sleeve 511. There is no need to precisely insert pin 611 into sleeve 511. Instead, it is gradually introduced into sleeve 511 through expansion tube 811, so that the spacing between the two sets of pins 611 gradually becomes consistent with the spacing of through hole 311.

[0054] In addition, the cutting cylinder 512 is a cylindrical structure with the upper and lower parts connected. The cutting plate 515 is provided with multiple inverted triangular plate structures that are all arc-shaped. The multiple cutting plates 515 are distributed in a ring and combined into a hemispherical structure. The upper end of the cutting plate 515 is rotatably connected to the inner wall of the cutting cylinder 512 through the rotating shaft 521. The inner arc surface above the cutting plate 515 is provided with a blade 522.

[0055] When all the cutting plates 515 are assembled into a hemispherical structure, the lower end of the pin 611 cannot penetrate the cutting cylinder 512. Instead, the lower end of the pin 611 abuts against the top of the hemispherical cutting plates 515. At this time, the cutting cylinder 512 is rotated as a whole, and the cutting plates 515 on the inner wall rotate relative to the pin 611. This can cut the lower end of the pin 611 into a chamfered state, so that the tip of the pin 611 is in the center position, which promotes the smooth insertion of the lower end of the pin 611 into the through hole 311 of the PCB board 3, rather than frequently probing the surface of the PCB board 3 around the through hole 311.

[0056] In addition, during the rotation of the cutting cylinder 512, the pressure plate 711 continuously and slowly presses down on the inductor body 6. During the pressing process, the lower ends of the two sets of pins 611 can be placed on the same plane, which makes it easier for the lower ends of the two pins 611 to be inserted into the two through holes 311 at the same time.

[0057] In addition, a first magnetic sheet 531 is provided on the outer arc surface below the cutting plate 515, and a second magnetic sheet 532 is provided on the inner wall of the cutting cylinder 512, which is attracted to the first magnetic sheet 531. An assembly groove 533 is provided on one side of the cutting plate 515, and an insert block 535 is slidably provided in the assembly groove 533 by a first spring 534. A slot 536 is provided on the other side of the cutting plate 515, which is matched with the insert block 535. A second magnetic block 537 is provided on the insert block 535.

[0058] The assembly slot 533 is provided with a first magnetic block 538 that is attracted to the second magnetic block 537. The first magnetic block 538 and the first magnetic sheet 531 are an integral structure and are electrically connected to an external power source. The inner wall of the cutting cylinder 512 is assembled and connected to the outer arc surface of the cutting plate 515 through the second spring 539.

[0059] In the initial state, the first magnetic sheet 531 is de-energized from the external power supply, and all the cutting plates 515 converge toward the center of the cutting cylinder 512 under the pushing action of the second spring 539, forming a hemispherical structure.

[0060] It should be noted that the side of the insert 535 facing the center of the cutting cylinder 512 is set with an incline. When two adjacent cutting plates 515 approach each other, the side of the cutting plate 515 with the slot 536 presses the insert 535 and the first spring 534, causing the insert 535 to retract into the assembly groove 533. When the side walls of the adjacent cutting plates 515 are just in contact, the end face of the insert 535 loses the pressure and pops outward under the pushing action of the first spring 534 and inserts into the slot 536. This is used to position the adjacent cutting plates 515 and prevent the cutting plate 515 from being pushed by the pin 611 during the rotational cutting process of the cutting plate 515 on the end face of the pin 611, which would cause instability.

[0061] In addition, after the lower end of pin 611 is cut, the first magnetic sheet 531 is electrically connected to the external power supply. The first magnetic sheet 531 generates magnetism and attracts the second magnetic sheet 532, which drives the cutting plate 515 with the first magnetic sheet 531 to move towards the inner wall of the cutting cylinder 512. Meanwhile, the insert block 535 and the slot 536 are in a locked state. Since the first magnetic block 538 and the first magnetic sheet 531 are integrated, the magnetism generated by the first magnetic block 538 after being energized can attract the second magnetic block 537 and shrink it into the assembly slot 533. At this time, the adjacent cutting plates 515 are separated and can freely rotate around the pivot 521 to fit against the inner wall of the cutting cylinder 512, so that the pin 611 can pass through the cutting cylinder 512 and move downward until it is inserted into the PCB board 3.

[0062] It should be noted that the lower end of the sleeve 511 is provided with an annular groove, and the upper end of the cutting cylinder 512 is provided with an annular bar that slides and adapts to the annular groove. During the rotation, the cutting cylinder 512 can rotate arbitrarily at the lower end of the sleeve 511.

[0063] In addition, a fixing ring 541 is provided at the lower end of the cutting cylinder 512, and a rubber layer 542 is provided on the lower inner wall of the fixing ring 541. The rubber layer 542 is a center-upward protrusion mechanism and does not contact the cutting plate 515. A cross groove 543 is provided at the center of the rubber layer 542. A dust removal pipe 544 is connected to the side wall of the fixing ring 541. A fan 545 is provided on the welding machine body 2. The end of the dust removal pipe 544 away from the fixing ring 541 is sealed and connected to the air inlet end of the fan 545.

[0064] Through the cooperation of the fixing ring 541 and the rubber layer 542, the cutting plate 515 collects the debris cut from the lower end of the pin 611. The debris can fall onto the rubber layer 542, and the fan 545 drives the dust removal pipe 544 to suck away the debris falling from the rubber layer 542. When the pin 611 extends downward through the cutting cylinder 512 and enters the fixing ring 541, it can push the rubber layer 542 as it continues to move downward, so that the lower end of the pin 611 pushes open the cross groove 543 in the middle of the rubber layer 542 and passes through the fixing ring 541 to move downward.

[0065] In addition, an annular toothed groove 551 is provided at the center of the outer wall of the cutting cylinder 512, and a toothed plate 552 is meshed on the annular toothed groove 551. The two ends of the toothed plate 552 are respectively meshed with the outer sides of the two cutting cylinders 512. The toothed plate 552 is slidably disposed on one side of the floating member 513. A gear 553 is rotatably disposed on the outer side of the floating member 513. A strip groove 554 is provided at the center of the toothed plate 552. A rack 555 that meshes with the gear 553 is provided above and below the strip groove 554. The gear 553 is driven to rotate by a motor 556.

[0066] Gear 553 has a small number of tooth blocks. When motor 556 drives gear 553 to rotate, the tooth blocks on gear 553 do not mesh with the upper and lower racks 555 at the same time. When the last tooth block on gear 553 separates from the last tooth block of the upper rack 555, the first tooth block at the other end of gear 553 meshes with the first tooth block at the same end of the lower rack 555. When gear 553 meshes with the upper or lower racks 555 respectively, it achieves the effect of reciprocating movement of gear 553 relative to the strip groove 554. The position of gear 553 relative to the floating part 513 is fixed, which can achieve the left and right reciprocating movement of the tooth plate 552, thereby driving the cutting cylinder 512 to reciprocate. The internal cutting plate 515 reciprocates cutting the lower end of the pin 611.

[0067] The combination of expansion tube 811, sleeve 511, cutting cylinder 512, fixing ring 541, cutting plate 515, floating part 513 and guide plate 514 are all centrally symmetrical structures. The two ends of the floating part 513 are respectively provided with second cylinders 562 through brackets 561. The end face of the second cylinder 562 is assembled and connected to the welding machine body 2.

[0068] The outer side of the rubber layer 542 is provided with an outer ring 563. Half of the outer ring 563 is fixedly connected to half of the fixing ring 541. The inner side of the other half of the fixing ring 541 is provided with a limiting groove 564. The other half of the outer ring 563 is engaged with the limiting groove 564.

[0069] In addition, the two sets of expansion tubes 811, sleeves 511, cutting cylinders 512, fixing rings 541, floating parts 513 and guide plates 514 are respectively set to engage with each other by locking blocks and slots;

[0070] Before soldering, the PCB board 3 is placed on the storage slot 4, and then the second cylinder 562 is driven to bring the two half-groups of soldering auxiliary mechanisms closer together and merge them. The pins 611 of the inductor body 6 are placed in the two sleeves 511. The lower corners of the two sets of pins 611 are rounded and aligned by the cutting cylinder 512. Then, they are inserted into the PCB board 3 through the guide plate 514. After separating the two half-groups of soldering auxiliary mechanisms, the pins 611 are soldered to the through holes 311 of the PCB board 3.

[0071] In addition, the floating component 513 includes a main frame 5131 and an inner frame 5132. The two ends of the main frame 5131 and the inner frame 5132 are respectively assembled and connected to two sleeves 511. The other end of the inner frame 5132 is provided with an end block 5133. A floating groove 5134 is opened on the main frame 5131. The end block 5133 is slidably disposed in the floating groove 5134. The two ends of the end block 5133 are respectively assembled and connected to the two ends of the floating groove 5134 through a third spring 5135. The main frame 5131 is assembled and connected to a guide plate 514 at the bottom. Multiple limiting angles 5136 are provided below the guide plate 514. The height of the limiting angles 5136 is 0.5mm-1mm.

[0072] The floating component 513 is designed to accommodate minor errors. The lower end of the limiting angle 5136 is placed directly in the space around the through hole 311 on the PCB board 3 to support the guide plate 514 and to allow space for movement between the guide plate 514 and the PCB board 3.

[0073] Multiple right-angle clamps 721 are provided at equal intervals on the lower edge of the pressure plate 711. The right-angle ends of the right-angle clamps 721 are rotatably connected to the pressure plate 711. Both ends of the right-angle clamps 721 are provided with buffer pads 722. The upper end of the right-angle clamps 721 is assembled and connected to the pressure plate 711 through a fourth spring 723.

[0074] In this process, after the inductor body 6 is placed on the welding auxiliary mechanism by the loading robot arm 1, the pressure plate 711 is moved down. The upper end of the right angle clamp 721 first contacts the upper end of the inductor body 6. As it continues to move down, the upper end of the inductor body 6 pushes against the upper end of the right angle clamp 721 and causes the fourth spring 723 to contract, causing the right angle clamp 721 to gradually become perpendicular to the pressure plate 711. The lower end of the right angle clamp 721 gradually approaches the inductor body 6 and clamps and limits the side wall of the inductor body 6, ensuring that the position of the inductor body 6 is offset when the pressure plate 711 moves down, thus affecting the insertion effect of the pin 611.

[0075] Working principle:

[0076] Step S1: Use the loading robotic arm 1 to hold the PCB board 3 to be welded and place it stably in the storage slot 4. Simultaneously drive the extension of the two sets of second cylinders 562 to push the two half sets of welding auxiliary mechanisms closer and stably engage. Use the loading robotic arm 1 again to hold the inductor body 6 to be welded, so that its two sets of pins 611 are inserted into the two sleeves 511 respectively.

[0077] Step S2: Drive the first cylinder 712 to extend, causing the pressure plate 711 to move downward. The upper end of the inductor body 6 pushes the upper end of the right-angle clamp 721 below the pressure plate 711, causing the fourth spring 723 to contract. This causes the right-angle clamp 721 to gradually become perpendicular to the pressure plate 711. The lower end of the right-angle clamp 721 gradually approaches the inductor body 6 and clamps and limits the side wall of the inductor body 6. The pressure plate 711 continues to move downward, pushing the inductor body 6 until the lower end of the pin 611 is inside the cutting cylinder 512.

[0078] Step S3: The lower end of pin 611 abuts against the inner arc surface of the hemispherical cutting plate 515, driving the motor 556 to rotate the gear 553, which in turn drives the toothed plate 552 to move back and forth. Since the two ends of the toothed plate 552 are respectively engaged with the outer sides of the two cutting cylinders 512, the two cutting cylinders 512 can be driven to rotate back and forth synchronously. The blade on the inner arc surface of the cutting plate 515 is used to cut the lower end of pin 611 into a chamfer shape.

[0079] Step S4: The cutting process drives the fan 545 to discharge the debris in the space between the cutting cylinder 512 and the fixed ring 541 through the dust removal pipe 544.

[0080] Step S5: After the cutting is completed, the first magnetic sheet 531 is electrically connected to the external power supply. The first magnetic sheet 531 generates magnetism and attracts the second magnetic sheet 532, which drives the cutting plate 515 with the first magnetic sheet 531 to move towards the inner wall of the cutting cylinder 512. The magnetism generated by the first magnetic block 538 after being energized can attract the second magnetic block 537 and shrink it in the assembly groove 533. At this time, the adjacent cutting plates 515 are separated and can freely rotate around the rotating shaft 521 to fit against the inner wall of the cutting cylinder 512.

[0081] Step S6: Continue to push the pressure plate 711 down. The two pins 611 pass through the rubber layer 542 on the cutting cylinder 512 and the fixing ring 541 in sync, pass through the guide hole 5141 on the guide plate 514 in sequence, and are precisely inserted into the through hole 311 on the PCB board 3.

[0082] Step S7: The two sets of second cylinders 562 retract, the two half sets of welding auxiliary mechanisms separate, and under the limit of the right angle clamp 721 below the pressure plate 711, the inductor body 6 and its pin 611 inserted into the through hole 311 can remain stable. At this time, the welding head on the welding machine body 2 is used to weld the pin 611 and the through hole 311.

[0083] Step S8: After welding is completed and cooling is achieved, the first cylinder 712 is retracted to separate the pressure plate 711 from the inductor body 6. The welding completed inductor body 6 and PCB board 3 are then unloaded using the loading robotic arm 1.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A welding device for inductors, comprising a welding machine body (2) equipped with a loading robotic arm (1), wherein a storage slot (4) for placing a PCB board (3) is provided above the welding machine body (2), characterized in that, Also includes: A welding auxiliary mechanism is provided on the welding machine body (2) located directly above the storage trough (4). The welding auxiliary mechanism includes a sleeve (511), a cutting cylinder (512), a floating component (513), and a guide plate (514). The sleeve (511) has two sets and is adapted to the number of pins (611) on the inductor body (6) to be welded. The two sleeves (511) are connected by the floating component (513). The cutting cylinder (512) is sealed, rotates, and is connected to the lower end of the sleeve (511). The inner wall of the cutting cylinder (512) is rotatably provided with a cutting plate (515). The guide plate (514) 514) Located between the lower end of the cutting cylinder (512) and the upper part of the PCB board (3) and assembled with the floating part (513), the guide plate (514) has a guide hole (5141), the lower end of the pin (611) vertically penetrates the sleeve (511), the cutting cylinder (512) and the guide hole (5141) and is inserted into the reserved through hole (311) on the PCB board (3), the welding auxiliary mechanism is a detachable symmetrical structure; pressure plate (711), the pressure plate (711) is assembled with the welding machine body (2) through the first cylinder (712), the pressure plate (711) is located directly above the inductor body (6).

2. The welding equipment for inductors according to claim 1, characterized in that: The upper end of the sleeve (511) is connected to an expansion tube (811), which is wide at the top and narrow at the bottom. The inner diameter of the upper end of the expansion tube (811) is twice the diameter of the pin (611), and the inner wall of the sleeve (511) is adapted to the diameter of the pin (611).

3. The welding equipment for an inductor according to claim 2, characterized in that: The cutting cylinder (512) is a cylindrical structure with the upper and lower parts connected. The cutting plate (515) is provided with multiple inverted triangular plate structures that are all arc-shaped. The multiple cutting plates (515) are arranged in a ring and combined to form a hemispherical structure. The upper end of the cutting plate (515) is rotatably connected to the inner wall of the cutting cylinder (512) through a rotating shaft (521). The inner arc surface above the cutting plate (515) is provided with a blade (522).

4. The welding equipment for an inductor according to claim 3, characterized in that: The cutting plate (515) has a first magnetic sheet (531) on its outer arc surface below. The inner wall of the cutting cylinder (512) has a second magnetic sheet (532) that is attracted to the first magnetic sheet (531). The cutting plate (515) has an assembly groove (533) on one side. The assembly groove (533) has a plug (535) that is slidably provided in the assembly groove (533) by a first spring (534). The cutting plate (515) has a slot (536) that fits into the plug (535) on the other side. The plug (535) has a second magnetic block (537). The assembly groove (533) has a first magnetic block (538) that is attracted to the second magnetic block (537). The first magnetic block (538) and the first magnetic sheet (531) are an integral structure and are electrically connected to an external power source. The inner wall of the cutting cylinder (512) is connected to the outer arc surface of the cutting plate (515) by a second spring (539).

5. The welding equipment for an inductor according to claim 4, characterized in that: The lower end of the cutting cylinder (512) is provided with a fixing ring (541), and the inner wall of the fixing ring (541) is provided with a rubber layer (542). The rubber layer (542) is a center-upward protrusion mechanism and does not contact the cutting plate (515). A cross groove (543) is provided at the center of the rubber layer (542). A dust removal pipe (544) is connected to the side wall of the fixing ring (541). A fan (545) is provided on the welding machine body (2). The end of the dust removal pipe (544) away from the fixing ring (541) is sealed and connected to the air inlet end of the fan (545).

6. The welding equipment for an inductor according to claim 5, characterized in that: An annular toothed groove (551) is provided at the center of the outer wall of the cutting cylinder (512). A toothed plate (552) is engaged on the annular toothed groove (551). The two ends of the toothed plate (552) are engaged with the outer sides of the two cutting cylinders (512) respectively. The toothed plate (552) is slidably disposed on one side of the floating member (513). A gear (553) is rotatably disposed on the outer side of the floating member (513). A strip groove (554) is provided at the center of the toothed plate (552). A rack (555) is provided above and below the strip groove (554) to engage with the gear (553). The gear (553) is driven to rotate by a motor (556).

7. The welding equipment for an inductor according to claim 6, characterized in that: The combination of the expansion tube (811), sleeve (511), cutting cylinder (512), fixing ring (541), cutting plate (515), floating component (513), and guide plate (514) are all centrally symmetrical structures. The two ends of the floating component (513) are respectively provided with second cylinders (562) through brackets (561). The end face of the second cylinder (562) is assembled and connected to the welding machine body (2). The outer side of the rubber layer (542) is provided with an outer ring (563). The outer ring (563) is fixedly connected to one half of the fixed ring (541), and the inner side of the other half of the fixed ring (541) is provided with a limiting groove (564). The other half of the outer ring (563) is engaged with the limiting groove (564). The two sets of expansion tube (811), sleeve (511), cutting cylinder (512), fixed ring (541), floating part (513) and guide plate (514) are respectively engaged with each other by a locking block and a locking groove.

8. The welding equipment for an inductor according to claim 7, characterized in that: The floating component (513) includes a main frame (5131) and an inner frame (5132). The two ends of the main frame (5131) and the inner frame (5132) are respectively assembled and connected to two sleeves (511). The other end of the inner frame (5132) is provided with an end block (5133). The main frame (5131) is provided with a floating groove (5134). The end block (5133) is slidably disposed in the floating groove (5134). The two ends of the end block (5133) are respectively assembled and connected to the two ends of the floating groove (5134) through a third spring (5135). The main frame (5131) is assembled and connected to the guide plate (514) at the bottom. The guide plate (514) is provided with multiple limiting angles (5136) at the bottom. The height of the limiting angles (5136) is 0.5mm-1mm.

9. The welding equipment for an inductor according to claim 8, characterized in that: Multiple right-angle clips (721) are provided at equal intervals at the lower edge of the pressure plate (711). The right-angle ends of the right-angle clips (721) are rotatably connected to the pressure plate (711). Both ends of the right-angle clips (721) are provided with buffer pads (722). The upper end of the right-angle clips (721) is assembled and connected to the pressure plate (711) through a fourth spring (723).

10. A method for welding an inductor, characterized in that, Welding equipment for an inductor according to any one of claims 1 to 9 The process includes the following steps: Step S1: Using the loading robotic arm (1), the PCB board (3) to be soldered is held and placed stably in the storage slot (4). The two sets of second cylinders (562) are driven to extend synchronously, pushing the two half sets of soldering auxiliary mechanisms closer together and stably engaging. The loading robotic arm (1) is used again to hold the inductor body (6) to be soldered, so that its two sets of pins (611) are inserted into the two sleeves (511) respectively. Step S2: The first cylinder (712) is driven to extend, causing the pressure plate (711) to move down. The upper end of the inductor body (6) pushes the upper end of the right angle clamp (721) below the pressure plate (711), causing the fourth spring (723) to contract, causing the right angle clamp (721) to gradually become perpendicular to the pressure plate (711). The lower end of the right-angle clamp (721) gradually approaches the inductor body (6) and clamps and limits the side wall of the inductor body (6). The pressure plate (711) continues to move down and pushes the inductor body (6) until the lower end of the pin (611) is inside the cutting cylinder (512). In step S3, the lower end of the pin (611) abuts against the inner arc surface of the hemispherical cutting plate (515), driving the motor (556) to drive the gear (553) to rotate, thereby driving the toothed plate (552) to move back and forth. Since the two ends of the toothed plate (552) are respectively engaged with the outer sides of the two cutting cylinders (512), the two cutting cylinders (512) can be driven to rotate back and forth synchronously. The blade on the inner arc surface of the cutting plate (515) is used to cut the lower end of the pin (611). Cut into a chamfered shape; Step S4: During the cutting process, the fan (545) is driven to discharge the debris in the space between the cutting cylinder (512) and the fixing ring (541) through the dust removal pipe (544); Step S5: After the cutting is completed, the first magnetic plate (531) is electrically connected to the external power supply. The first magnetic plate (531) generates magnetism and attracts the second magnetic plate (532) to each other, driving the cutting plate (515) with the first magnetic plate (531) to move towards the inner wall of the cutting cylinder (512). The magnetism generated by the first magnetic block (538) after being energized can attract the second magnetic block (537) to shrink in the assembly groove (533). At this time, the adjacent cutting plates (515) are separated and can freely rotate around the rotating shaft (521) to fit inside the cutting cylinder (512). Wall; Step S6, continue to push the pressure plate (711) down, the two pins (611) pass through the rubber layer (542) on the cutting cylinder (512) and the fixing ring (541) in sync, pass through the guide hole (5141) on the guide plate (514) in sequence and be precisely inserted into the through hole (311) on the PCB board (3); Step S7, retract the two sets of second cylinders (562), the two half sets of welding auxiliary mechanisms separate, under the limit of the right angle clamp (721) below the pressure plate (711), the inductor body (6) and its pins (611) inserted into the through hole (311) can remain stable, at this time the welding head on the welding machine body (2) is used to weld the pins (611) and the through hole (311);Step S8: After welding is completed and cooling is achieved, the first cylinder (712) is retracted, causing the pressure plate (711) to separate from the inductor body (6). The welded inductor body (6) and PCB board (3) are then unloaded using the loading robotic arm (1).

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