An inductor coil welding device and a welding process

Abstract

The present application relates to a coil welding device and a welding process for an inductor, comprising: a workbench, a strip guide for wafers and a guiding and pressing device. Along the feeding direction on the workbench, a first welding device, a bending device and a second welding device are sequentially arranged at intervals. The strip guides for wafers are respectively arranged on both sides of the first welding device and the second welding device. A strip wafer capable of carrying coils is provided on the strip guide for wafers. A pole piece capable of being welded to the coil is provided on the strip wafer. The strip wafer passes through the first welding device, the bending device and the second welding device. The pole piece and the coil are welded by the first welding device, and after the pole piece is bent by the bending device, it is further welded by the second welding device. A plurality of guiding and pressing devices are provided for aligning the coils. The guiding and pressing device includes a rotatable pressing member. The pressing member can press the strip wafer against the strip guide for wafers, and at the same time deforms and generates traction forces in opposite directions on both sides of the strip wafer to tension the strip wafer.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular, to a coil welding device and welding process for inductors. Background Art

[0002] As an important part of new materials in electronic information, the integrated inductor is the cornerstone of the development of the information technology industry. Traditional inductors are formed by winding wires around ferrite core components to form inductor components.

[0003] For existing inductor components, during production, generally, a coil curled into a spiral shape needs to be welded to a pole piece. After cutting, it is installed in the encapsulation housing of the inductor component, and magnetic powder is poured in. After hot pressing, it is formed. Finally, the pole piece is bent to serve as the lead of the inductor component.

[0004] However, in the above-mentioned production process of inductor components, when welding the inductor components, due to subsequent processes such as cutting, after welding, the welding between the coil and the pole piece will become loose due to the disturbance of subsequent processes, resulting in false welding, and ultimately leading to the generation of defective inductor components. Summary of the Invention

[0005] This application provides a coil welding device and welding process for inductors, which can solve the problem that the welding of the coil inside the existing inductor component is poor due to the disturbance of subsequent processes.

[0006] The technical solution of this application is as follows: A coil welding device for inductors includes:

[0007] A workbench, on which a first welding device, a bending device, and a second welding device are sequentially arranged at intervals along the feeding direction;

[0008] A strip-shaped sheet guide rail, which is respectively arranged on both sides of the first welding device and the second welding device. A strip-shaped sheet capable of carrying a coil is provided on the sheet guide rail. A pole piece that can be welded to the coil is provided on the strip-shaped sheet. The strip-shaped sheet penetrates through the first welding device, the bending device, and the second welding device. The pole piece and the coil are welded by the first welding device, and after the pole piece is bent by the bending device, it is further welded by the second welding device;

[0009] A guiding and pressing device, multiple guiding and pressing devices are provided, and the multiple guiding and pressing devices are arranged at intervals on the sheet guide rail and are located on both sides of the first welding device and the second welding device for straightening the coil. The guiding and pressing device includes a rotatable pressing member, and the pressing member can press the strip-shaped sheet against the sheet guide rail, and at the same time deforms and generates traction forces in opposite directions on both sides of the strip-shaped sheet to tension the strip-shaped sheet.

[0010] By adopting the above solution, when welding the coil, after initially welding the coil, the pole plate is bent by using a bending device, so that the bent pole piece can be bent and fit against the pin of the coil, increasing the contact area between the two. Then, secondary welding is carried out, which can improve the stability during coil welding. During subsequent processes such as cutting, the possibility of loosening at the welded part is reduced. When welding or bending, the strip-shaped sheet can be pressed by a pressing member, preventing the pole piece from being disturbed when welding or bending the pole piece. It can also correct the angle of the skewed coil and at the same time tension the strip-shaped sheet, reducing the possibility of its deformation.

[0011] In one embodiment of the present application, the strip-shaped sheet further includes strip bars, and there are two strip bars arranged in parallel to each other. There are multiple pole pieces, and the multiple pole pieces are arranged at intervals on one side of the two strip bars close to each other. The pole pieces on the two strip bars are arranged in one-to-one correspondence and form a hollow area for the coil to pass through. The pole piece is provided with a bendable bending portion.

[0012] By adopting the above solution, by providing a bendable bending portion on the pole piece, when the coil is inserted into the strip-shaped sheet, the bending portion can be bent after being bent and can bend around the pin of the coil, thereby increasing the contact area between the pole piece and the pin to improve the stability during subsequent welding.

[0013] In one embodiment of the present application, the bending device includes:

[0014] A bending vertical frame, which is fixedly assembled on the workbench;

[0015] A bending cylinder, which is arranged in the vertical direction and fixedly assembled on the bending vertical frame. A bending head is detachably connected to the driving shaft of the bending cylinder, and the bending head is adapted to the pole piece.

[0016] By adopting the above solution, the bending cylinder drives the bending head adapted to the pole piece to press down. During the process of pressing down, the bending head can bend the bending portion of the pole piece by 90° around the pin of the coil, thereby increasing the contact area between the pole piece and the coil and facilitating the secondary welding of the coil.

[0017] In one embodiment of the present application, it further includes a picking component, and the picking component includes:

[0018] A linear movement module, which is fixedly assembled on the workbench and is located on one side below the strip-shaped sheet;

[0019] A lifting cylinder, which is arranged vertically and assembled on the slider of the linear movement module. A clamping member is arranged on the driving shaft of the lifting cylinder.

[0020] By adopting the above scheme, when using the picking component to place the spiral coil on the strip-shaped sheet, the clamping member clamps the coil, and driven by the moving linear module, the coil is transported to the lower part of the strip-shaped sheet. At the same time, the lifting cylinder drives the clamping member with the coil to rise, enabling it to pass through the hollow area between two oppositely arranged pole pieces until the bent part of the pole piece can abut against the pin of the coil, and the bent part is clamped into the gap between the coil and the pin.

[0021] In one embodiment of the present application, both the first welding device and the second welding device include:

[0022] A welding frame, which is arranged on the workbench;

[0023] A welding cylinder, which is arranged in the vertical direction and fixedly assembled on the welding frame. A welding gun is provided on the driving shaft of the welding cylinder, and the welding gun is used to weld the pole piece and the pin of the coil together.

[0024] By adopting the above scheme, when the coil passes through the first welding device or the second welding device, the welding cylinder can drive the welding gun to move and approach the coil, thereby welding the coil and the bent part of the pole piece together, improving the welding efficiency.

[0025] In one embodiment of the present application, the guiding and pressing device further includes:

[0026] Two groups of guiding frame assemblies, each group of guiding frame assemblies includes two guiding frames. Both of the two guiding frames are arranged above the sheet guide rail. A threaded rod is rotatably connected inside the guiding frame, and the threaded rod penetrates through the guiding frame;

[0027] A spacer block, which is sleeved on the threaded rod and threadedly connected to the threaded rod. The spacer block is located on the side where the pressing members are close to each other;

[0028] The pressing member is a disc-shaped component. Two of the pressing members are arranged inside each guiding frame. The pressing member is threadedly connected to the threaded rod, and the pressing member is located on the side where the guiding frames are close to each other;

[0029] An elastic band, with guiding rings respectively arranged at both ends of the elastic band. The guiding rings are respectively sleeved on the threaded rods inside the two groups of guiding frame assemblies and are located on the side where the two spacer blocks are close to each other. A material passing gap is formed between the two elastic bands, and the width of the material passing gap gradually decreases along the feeding direction.

[0030] By adopting the above solution, the coil is arranged on the strip-shaped sheet. When the coil moves with the strip-shaped sheet until it reaches the inside of the guiding and pressing assembly, since the width of the material passing gap gradually decreases along the feeding direction, some coils that are skewed during placement can be automatically corrected when passing through the material passing gap due to the resistance of the elastic band. By rotating the cushion block on the threaded rod according to the size of the coil to be produced as needed, the distance between the two cushion blocks can be adjusted so that the distance between the two elastic bands can be adjusted according to the diameter of the coil. In addition, during the movement of the strip-shaped strip, the pressing member can maintain sufficient downward pressure on the strip-shaped sheet to prevent the strip-shaped strip from skewing.

[0031] In one embodiment of the present application, a rubber washer is coaxially arranged along the circumferential direction of the pressing member. The rubber washer is provided with an annular groove along its circumferential direction. The annular grooves on two adjacent rubber washers are inclined towards the direction of approaching each other.

[0032] By adopting the above solution, by using the rubber washer arranged along the circumferential direction of the pressing member, when the pressing member abuts against the strip-shaped sheet, the rubber washer deforms at the annular groove. Since the inclination directions of the annular grooves on two adjacent rubber washers are opposite, when the annular groove is subjected to a positive pressure, it bends in opposite directions. The static friction generated during bending can stretch and pull the strip of the strip-shaped sheet in opposite directions, thereby being able to play a role in tensioning the strip-shaped sheet and reducing the possibility of the strip-shaped sheet deforming due to being disturbed during the working process.

[0033] In one embodiment of the present application, the guiding and pressing device further includes:

[0034] A connecting frame assembly, the connecting frame assembly includes two connecting frames. The two connecting frames are respectively fixedly assembled above the sheet guide rail. A plurality of the pressing members are spaced apart on one side of the two connecting frames close to each other. The pressing member is a cylindrical member and is rotatably connected to the connecting frame. A plurality of pressing members located on the two connecting frames are arranged side by side and form a feeding channel. The width of the feeding channel gradually decreases along the feeding direction.

[0035] By adopting the above solution, by arranging the pressing member on one side of the two connecting frames close to each other, the feeding channel formed by the arrangement of the pressing members on the two connecting frames can also play a role in correcting the deviation of the coil. By customizing the inclination degree of the surface on one side of the two connecting frames close to each other, the inclination degree of the arrangement of the pressing members can be set, so that the pressing member can not only press the strip-shaped sheet, but also correct the deviation of the coil.

[0036] In one embodiment of the present application, the pressing member includes a rotating disk, an annular rubber sleeve is fixedly connected to the outer edge of the rotating disk along its circumferential direction, a filling gap is provided between the annular rubber sleeve and the rotating disk, a filling medium is provided inside the filling gap, an arc-shaped cavity is provided inside the annular rubber sleeve, and the arc-shaped cavity is located inside the annular rubber sleeve on the side away from the connecting frame.

[0037] Through the annular rubber sleeve, and the annular rubber sleeve is arranged on the outer edge of the rotating disk, a filling medium is arranged in the filling gap. When the pressing member presses on the strip-shaped sheet, the annular rubber sleeve on the pressing member deforms after being squeezed. Since an arc-shaped cavity is provided inside the annular rubber sleeve on the side where the annular rubber sleeves are close to each other, when the filling medium is squeezed, it will flow towards the arc-shaped cavity under the action of the squeeze, so that the annular rubber sleeve undergoes tensile deformation. Since the tension can generate a lateral static friction force and traction force on the strip-shaped sheet, it can also achieve the purpose of tensioning the strip-shaped sheet.

[0038] The second object of the present invention is to provide a coil welding process for an inductor.

[0039] In order to achieve the above object, the technical solution of the present application is as follows: A coil welding process for an inductor, using an inductor coil welding device to weld a coil, includes the following steps:

[0040] Step 1: The picking component clamps the coil on the strip-shaped sheet and transports it into the first welding device along with the movement of the strip-shaped sheet for primary welding to obtain a primary coil;

[0041] Step 2: The primary coil moves into the bending device, and the bending device bends the bending part on the strip-shaped sheet so that the bending part bends and fits on the lead of the primary coil to obtain a reinforced coil;

[0042] Step 3: The reinforced coil moves into the second welding device, and the second welding device performs secondary welding on the bending part and the lead of the reinforced coil to obtain a finished coil;

[0043] Step 4: Cut and discharge the finished coil on the strip-shaped sheet.

[0044] By adopting the above solution, when the device welds the coil, by performing primary welding on the coil, then reinforcing the coil lead by bending the bending part of the bending pole piece, and finally performing secondary welding, the welding stability between the coil and the pole piece is improved.

[0045] In one embodiment of the present application,

[0046] In summary, the present application includes at least one of the following beneficial technical effects:

[0047] By setting a bending device, a first welding device and a second welding device, when the coil is welded to the pole piece, it first undergoes preliminary welding reinforcement by the first welding device, then the pole piece is bent by the bending device and surrounded around the pins of the coil, and the second welding device is used for secondary welding to improve the welding stability of the coil.

[0048] By setting a guiding and pressing device, during the process of the coil being welded and moving along with the strip-shaped sheet, the guiding and pressing device gradually narrows along the feeding direction, so that it can play a role in correcting the skewed coil. At the same time, the guiding and pressing device can use the pressing parts to press both sides of the strip-shaped sheet, so that it will not deviate during the movement, and at the same time, it can provide traction forces in opposite directions to tension the strip-shaped sheet, so that the strip-shaped sheet will not wrinkle, thereby further ensuring the stability of the coil during welding.

[0049] By setting the threaded rod to be in threaded cooperation with the cushion block and setting the elastic band, the device can adjust the distance between the two elastic bands according to the size of the coil specification. At the same time, the distance between the two sets of guiding frame components can also be customized. The elastic band can be stretched according to the distance between the two sets of guiding frame components, so as to extend or shorten the length of the elastic band, and further extend or shorten the length of the material passing gap, so that the device can be flexibly adjusted according to the size of the coil specification. Description of the Drawings

[0050] Figure 1 is the front view of a coil welding device for an inductor provided in the first embodiment of the present application;

[0051] Figure 2 is the front view of the pole piece and the coil being clamped in a coil welding device for an inductor provided in the first embodiment of the present application;

[0052] Figure 3 is the front view of the first welding device of a coil welding device for an inductor provided in the first embodiment of the present application;

[0053] Figure 4 is the front view of the bending device of a coil welding device for an inductor provided in the first embodiment of the present application;

[0054] Figure 5 is the front view of the guiding and pressing device and the bending device of a coil welding device for an inductor provided in the first embodiment of the present application;

[0055] Figure 6 is the front view of the picking component of a coil welding device for an inductor provided in the first embodiment of the present application;

[0056] Figure 7 is the front view of the guiding and pressing device of a coil welding device for an inductor provided in the first embodiment of the present application;

[0057] Figure 8 It is the front view of a guiding and pressing device of a coil welding device for an inductor provided by the first embodiment of the present application;

[0058] Figure 9 It is the front sectional view of a pressing part of a coil welding device for an inductor provided by the first embodiment of the present application;

[0059] Figure 10 It is the front view of a guiding and pressing device of a coil welding device for an inductor provided by the second embodiment of the present application;

[0060] Figure 11 It is the front sectional view of a pressing part of a coil welding device for an inductor provided by the second embodiment of the present application.

[0061] Explanation of reference numerals: 1, workbench; 2, first welding device; 21, welding frame; 22, welding cylinder; 221, welding torch; 3, second welding device; 4, bending device; 41, bending vertical frame; 42, bending cylinder; 421, bending head; 5, strip material guide rail; 6, strip material; 61, pole piece; 611, bending part; 62, strip; 63, hollow area; 7, guiding and pressing device; 71, pressing part; 711, rubber washer; 7111, annular groove; 72, guiding frame assembly; 721, guiding frame; 722, threaded rod; 73, cushion block; 74, elastic band; 741, guiding ring; 742, material passing gap; 75, connecting frame assembly; 751, connecting frame; 752, feeding channel; 76, rotating disk; 761, annular rubber sleeve; 762, filling gap; 763, filling medium; 764, arc-shaped cavity; 8, picking component; 81, linear moving module; 82, lifting cylinder; 83, clamping part; 9, coil. Detailed Description of the Invention

[0062] The following Figures 1-11 further elaborates in detail on a coil welding device and a welding process for an inductor provided by the present application.

[0063] Embodiment 1, a coil welding device for an inductor provided in an embodiment of the present application includes: a workbench 1, a strip material guide rail 5, and a guiding and pressing device 7.

[0064] Please refer to Figure 1 and Figure 2, a first welding device 2, a bending device 4, and a second welding device 3 are sequentially arranged at intervals along the feeding direction on the workbench 1. The strip guide 5 is strip-shaped and is respectively arranged on both sides of the first welding device 2 and the second welding device 3. A strip-shaped sheet 6 capable of carrying the coil 9 is arranged on the strip guide 5. Pole pieces 61 capable of being welded to the coil 9 are arranged on the strip-shaped sheet 6. The strip-shaped sheet 6 penetrates through the first welding device 2, the bending device 4, and the second welding device 3. The pole piece 61 and the coil 9 are welded by the first welding device 2. After the pole piece 61 is bent by the bending device 4, it is further welded by the second welding device 3. A plurality of guiding and pressing devices 7 are arranged at intervals on the strip guide 5 and are located on both sides of the first welding device 2 and the second welding device 3 for straightening the coil 9. The guiding and pressing device 7 includes a rotatable pressing member 71. The pressing member 71 can press the strip-shaped sheet 6 against the strip guide 5, and at the same time, deform and generate traction forces in opposite directions on both sides of the strip-shaped sheet 6 to tension the strip-shaped sheet 6. By arranging the first welding device 2, the bending device 4, and the second welding device 3, when the device is welding, it can weld from both sides, and the pole piece 61 is bent by the bending device 4 between the two weldings to improve the welding stability between the pole piece 61 and the coil 9.

[0065] Among them, the strip-shaped sheet 6 can be tensioned by a feeding tray (not shown in the figure). The feeding tray can be arranged on both sides of the workbench 1 along the feeding direction, and a motor (not shown in the figure) is arranged. The driving shaft of the motor is fixedly connected to the feeding tray to drive the feeding tray to rotate to realize the movement of the strip-shaped sheet 6.

[0066] Please refer to Figure 1 and Figure 2 , the strip-shaped sheet 6 further includes strip bars 62. There are two strip bars 62 arranged parallel to each other. A plurality of pole pieces 61 are arranged at intervals on one side of the two strip bars 62 close to each other. The pole pieces 61 on the two strip bars 62 are arranged in one-to-one correspondence and form a hollow area 63 through which the coil 9 can pass. A bendable bending portion 611 is arranged on the pole piece 61. By arranging the pole piece 61 and the hollow area 63, the coil 9 can pass through squeezing the pole piece 61 and be clamped in the hollow area 63, which is convenient for placement and also convenient for subsequent welding.

[0067] In this embodiment, the pole piece 61 is an elastic conductive metal, and the width of the hollow area 63 is smaller than the diameter of the coil 9.

[0068] Please refer to Figure 1 and Figure 4, the bending device 4 includes: a bending vertical frame 41 and a bending cylinder 42. The bending vertical frame 41 is fixedly assembled on the workbench 1. The bending cylinder 42 is arranged in the vertical direction and fixedly assembled on the bending vertical frame 41. A bending head 421 is detachably connected to the driving shaft of the bending cylinder 42, and the bending head 421 is adapted to the pole piece 61. By using the bending cylinder 42, the bending head 421 can be driven to squeeze the bending part of the pole piece 61, so that it can bend around the pin, enabling the coil 9 to further contact the pin, thereby improving the subsequent welding stability.

[0069] Please refer to Figure 1 and Figure 6 , and further includes a picking component 8. The picking component 8 includes: a linear movement module 81 and a lifting cylinder 82. The linear movement module 81 is fixedly assembled on the workbench 1 and is located on the lower side of the strip-shaped sheet 6. The lifting cylinder 82 is arranged vertically and is assembled on the slider of the linear movement module 81. A clamping member 83 is arranged on the driving shaft of the lifting cylinder 82. By using the linear movement module 81 to drive the lifting cylinder 82 to move, and using the clamping member 83 to clamp and lift the coil 9 until the coil 9 passes through the hollow area 63 and is clamped in the strip-shaped sheet 6, the feeding convenience is improved. Among them, the clamping member 83 can be composed of an electric push rod (not shown in the figure) and a clamping block (not shown in the figure). The driving shaft of the electric push rod is fixedly connected to the clamping block. By arranging two clamping blocks, the coil 9 is clamped under the drive of the electric push rod.

[0070] Please refer to Figure 1 and Figure 3 , both the first welding device 2 and the second welding device 3 include: a welding frame 21 and a welding cylinder 22. The welding frame 21 is arranged on the workbench 1. The welding cylinder 22 is arranged in the vertical direction and fixedly assembled on the welding frame 21. A welding gun 221 is arranged on the driving shaft of the welding cylinder 22. The welding gun 221 is used to weld the pole piece 61 and the pin of the coil 9 together. By using the welding cylinder 22 to move the electric welding gun 221 close to the welding point between the coil 9 and the pole piece 61, convenient welding is achieved.

[0071] Please refer to Figure 5 , Figures 7 to 9, the guiding and pressing device 7 further includes: two groups of guiding frame assemblies 72, cushion blocks 73 and elastic bands 74. Each group of guiding frame assemblies 72 includes two guiding frames 721. Both of the two guiding frames 721 are arranged above the strip guide 5. A threaded rod 722 is rotatably connected inside the guiding frame 721. The threaded rod 722 penetrates through the guiding frame 721. The cushion block 73 is sleeved on the threaded rod 722 and is threadedly connected to the threaded rod 722. The cushion block 73 is located on one side where the pressing members 71 are close to each other. The pressing member 71 is a disc-shaped member. Two pressing members 71 are arranged inside each guiding frame 721. The pressing member 71 is threadedly connected to the threaded rod 722. The pressing member 71 is located on one side where the guiding frames 721 are close to each other. Guide rings 741 are respectively arranged at both ends of the elastic band 74. The guide rings 741 are respectively sleeved on the threaded rods 722 inside the two groups of guiding frame assemblies 72 and are located on one side where the two cushion blocks 73 are close to each other. A material passing gap 742 is formed between the two elastic bands 74. The width of the material passing gap 742 gradually decreases along the feeding direction. By setting the width of the material passing gap 742 to gradually decrease along the feeding direction, when the skewed coil 9 passes through the material passing gap 742, it can be automatically corrected due to the resistance of the elastic band 74. At the same time, by adjusting the distance between the two cushion blocks 73, the distance between the two elastic bands 74 can be adjusted according to the diameter of the coil 9.

[0072] Please refer to Figure 9 , a rubber gasket 711 is coaxially arranged along the circumference of the pressing member 71. An annular groove 7111 is formed along the circumference of the rubber gasket 711. The annular grooves 7111 on two adjacent rubber gaskets 711 are inclined towards the direction of approaching each other. By using the rubber gasket 711 arranged along the circumference of the pressing member 71, when the rubber gasket 711 abuts against the strip-shaped material 6, it deforms and bends at the annular groove 7111, and can stretch and pull the strip 62 of the strip-shaped material 6 in the opposite direction, so as to play a role in tensioning the strip-shaped material 6, and reduce the possibility of the strip-shaped material 6 deforming due to being disturbed during the working process.

[0073] Embodiment 2. The basic structure of Embodiment 2 is the same as that of Embodiment 1. The difference lies in that, please refer to 10 and Figure 11, the guiding and pressing device 7 further includes: a connecting frame assembly 75, the connecting frame assembly 75 includes two connecting frames 751, the two connecting frames 751 are respectively fixedly assembled above the strip guide 5, and a plurality of pressing members 71 are arranged at intervals on one side of the two connecting frames 751 close to each other. The pressing member 71 is a cylindrical member and is rotatably connected to the connecting frame 751. A plurality of pressing members 71 located on the two connecting frames 751 are arranged side by side and form a feeding channel 752. The width of the feeding channel 752 gradually decreases along the feeding direction. By arranging the pressing members 71 on the same connecting frame 751, the feeding channel 752 formed by the two rows of pressing members 71 is used to correct the deviation of the coil 9.

[0074] Please refer to Figure 11 The pressing member 71 includes a rotating disk 76. An annular rubber sleeve 761 is fixedly connected to the outer edge of the rotating disk 76 along its circumferential direction. A filling gap 762 is arranged between the annular rubber sleeve 761 and the rotating disk 76. A filling medium 763 is arranged inside the filling gap 762. An arc-shaped cavity 764 is arranged inside the annular rubber sleeve 761. The arc-shaped cavity 764 is located inside the annular rubber sleeve 761 on the side away from the connecting frame 751. By arranging the annular rubber sleeve 761 on the outer edge of the rotating disk 76 and arranging the filling medium 763 in the filling gap 762, after the filling medium 763 is extruded, it will flow towards the arc-shaped cavity 764 under the action of extrusion, so that the annular rubber sleeve 761 undergoes a tensile deformation. Since the tension can generate a lateral static friction force and traction force on the strip 6, the strip 6 is tensioned.

[0075] The second object of the present invention is to provide a coil welding process for inductors. A coil welding device for inductors is used to weld the coil 9, including the following steps:

[0076] Step 1: The picking component 8 clamps the coil 9 on the strip 6 and transports it to the inside of the first welding device 2 for primary welding with the strip 6 to obtain a primary coil.

[0077] Step 2: The primary coil moves to the inside of the bending device 4. The bending device 4 bends the bent portion 611 on the strip 6 so that the bent portion 611 bends and fits on the lead of the primary coil to obtain a reinforced coil.

[0078] Step 3: The reinforced coil moves to the inside of the second welding device 3. The second welding device 3 performs secondary welding on the bent portion 611 and the lead of the reinforced coil to obtain a finished coil.

[0079] Step 4: Cut and discharge the finished coil on the strip 6.

[0080] In summary, when the coil 9 needs to be welded, first, the picking component 8 picks up the coil 9 and transfers it to the lower part of the strip-shaped sheet 6. The lifting cylinder 82 drives the coil 9 to rise and snap into the hollow area 63 of the strip-shaped sheet. When the coil 9 passes through the first welding device 2, the pins of the coil 9 can be welded to the bent part of the pole piece 61 for the first time. After the first welding, under the action of the bending device 4, the bent part of the pole piece 61 is bent around the pin as the axis. After the coil 9 with the bent and strengthened part passes through the second welding device 3, secondary welding is further carried out, thus completing the welding.

[0081] The above are all preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An inductor coil welding device, characterized in that, Including: A workbench (1), on which a first welding device (2), a bending device (4) and a second welding device (3) are sequentially arranged at intervals along the feeding direction; A strip-shaped strip guide rail (5), which is respectively arranged on both sides of the first welding device (2) and the second welding device (3). A strip-shaped strip (6) capable of carrying a coil is arranged on the strip guide rail (5). A pole piece (61) capable of being welded to the coil is arranged on the strip-shaped strip (6). The strip-shaped strip (6) penetrates through the first welding device (2), the bending device (4) and the second welding device (3). The pole piece (61) and the coil are welded by the first welding device (2). After the pole piece (61) is bent by the bending device (4), it is further welded by the second welding device (3); A guiding and pressing device (7), there are multiple guiding and pressing devices (7), and the multiple guiding and pressing devices (7) are arranged at intervals on the strip guide rail (5) and are located on both sides of the first welding device (2) and the second welding device (3) for straightening the coil. The guiding and pressing device (7) includes a rotatable pressing member (71). The pressing member (71) can press the strip-shaped strip (6) against the strip guide rail (5), and at the same time deforms and generates traction forces in opposite directions on both sides of the strip-shaped strip (6) to tension the strip-shaped strip (6).

2. The coil welding device for an inductor according to claim 1, characterized in that: The strip-shaped strip (6) further includes strip bars (62), and there are two strip bars (62) arranged in parallel to each other. There are multiple pole pieces (61), and the multiple pole pieces (61) are arranged at intervals on one side of the two strip bars (62) close to each other. The pole pieces (61) on the two strip bars (62) are arranged in one-to-one correspondence and form a hollow area (63) through which the coil can pass. The pole piece (61) is provided with a bendable bending portion (611).

3. The coil welding device for an inductor according to claim 2, characterized in that: The bending device (4) includes: A bending vertical frame (41), which is fixedly assembled on the workbench (1); A bending cylinder (42), which is arranged in the vertical direction and is fixedly assembled on the bending vertical frame (41). A bending head (421) is detachably connected to the driving shaft of the bending cylinder (42), and the bending head (421) is adapted to the pole piece (61).

4. An inductor coil welding device according to claim 3, characterized in that: It further includes a picking component (8), and the picking component (8) includes: A linear moving module (81), which is fixedly assembled on the workbench (1) and is located on one side below the strip-shaped strip (6); A lifting cylinder (82), which is arranged vertically and is assembled on the slider of the linear moving module (81). A clamping member (83) is arranged on the driving shaft of the lifting cylinder (82).

5. The coil welding device for an inductor according to claim 1, wherein: Both the first welding device (2) and the second welding device (3) include: A welding frame (21), which is arranged on the workbench (1); A welding cylinder (22) is vertically arranged and fixedly assembled on the welding frame (21). A welding torch (221) is provided on the driving shaft of the welding cylinder (22), and the welding torch (221) is used to weld the pole piece (61) to the pin of the coil together.

6. The coil welding device for an inductor according to claim 1, characterized in that: The guiding and pressing device (7) further includes: Two groups of guiding frame assemblies (72). Each group of guiding frame assemblies (72) includes two guiding frames (721). Both of the two guiding frames (721) are arranged above the strip guide rail (5). A threaded rod (722) is rotatably connected inside the guiding frame (721), and the threaded rod (722) penetrates through the guiding frame (721); A spacer block (73) is sleeved on the threaded rod (722) and is threadedly connected to the threaded rod (722). The spacer block (73) is located on the side where the pressing members (71) are close to each other; The pressing members (71) are disk-shaped members. Two of the pressing members (71) are arranged inside each guiding frame (721). The pressing members (71) are threadedly connected to the threaded rod (722), and the pressing members (71) are located on the side where the guiding frames (721) are close to each other; An elastic band (74). Guide rings (741) are respectively arranged at both ends of the elastic band (74). The guide rings (741) are respectively sleeved on the threaded rods (722) inside the two groups of guiding frame assemblies (72) and are located on the side where the two spacer blocks (73) are close to each other. A material passing gap (742) is formed between the two elastic bands (74), and the width of the material passing gap (742) gradually decreases along the feeding direction.

7. An inductor coil welding device according to claim 6, characterized in that: A rubber washer (711) is coaxially arranged along the circumferential direction of the pressing member (71). An annular groove (7111) is formed along the circumferential direction of the rubber washer (711). The annular grooves (7111) on two adjacent rubber washers (711) are inclined towards the direction of approaching each other.

8. A coil welding device for an inductor according to claim 1, characterized in that: The guiding and pressing device (7) further includes: A connecting frame assembly (75). The connecting frame assembly (75) includes two connecting frames (751). The two connecting frames (751) are respectively fixedly assembled above the strip guide rail (5). A plurality of the pressing members (71) are arranged at intervals on the side where the two connecting frames (751) are close to each other. The pressing members (71) are cylindrical members and are rotatably connected to the connecting frames (751). The plurality of pressing members (71) located on the two connecting frames (751) are arranged side by side and form a feeding channel (752). The width of the feeding channel (752) gradually decreases along the feeding direction.

9. An inductor coil welding device according to claim 8, characterized in that: The pressing member (71) includes a rotating disk (76). An annular rubber sleeve (761) is fixedly connected to the outer edge of the rotating disk (76) along its circumferential direction. A filling gap (762) is provided between the annular rubber sleeve (761) and the rotating disk (76). A filling medium (763) is provided inside the filling gap (762). An arc-shaped cavity (764) is provided inside the annular rubber sleeve (761), and the arc-shaped cavity (764) is located inside the annular rubber sleeve (761) on the side away from the connecting frame (751).

10. A coil welding process for an inductor, characterized in that: Using a coil welding device for inductors as described in claim 4 to weld a coil, the following steps are included: Step 1: The picking component (8) clamps the coil on the strip-shaped piece (6) and transports it into the first welding device (2) along with the movement of the strip-shaped piece (6) for primary welding to obtain a primary coil; Step 2: The primary coil moves into the bending device (4). The bending device (4) bends the bending part (611) on the strip-shaped piece (6) so that the bending part (611) bends and fits on the lead of the primary coil to obtain a reinforced coil; Step 3: The reinforced coil moves into the second welding device (3). The second welding device (3) performs secondary welding on the bending part (611) and the lead of the reinforced coil to obtain a finished coil; Step 4: Cut and discharge the finished coil on the strip-shaped piece (6).

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