A hollow coil bending machine

Abstract

The present invention discloses a hollow coil bending machine, which belongs to the technical field of inductor processing equipment, and comprises an indentation mechanism and a bending mechanism sequentially arranged along the outer circumference of a rotating disk, and an inductor placement fixture for accommodating the inductor is arranged on the outer circumference of the rotating disk; the indentation mechanism comprises a pair of pre-pressing blocks arranged relatively and a first driving member driving the pair of pre-pressing blocks to clamp the inductor pins, and the pre-pressing blocks are provided with cutting blades; the cutting blades are used to cut dents on the inductor pins; the bending mechanism comprises a positioning device and a bending device, and the positioning device comprises a pair of positioning blocks arranged relatively and a second driving member driving the pair of positioning blocks to clamp the inductor pins; the bending device comprises a bending forming component and a bending driving component driving the bending forming component to push the inductor pins to bend. The method of first processing the dents on the inductor pins and then bending the inductor pins with the dents as the bending points makes it difficult for the inductor pins to rebound after bending, and can improve the yield rate of the inductor pins after bending.

Description

Technical Field

[0001] The invention relates to the technical field of inductor production equipment, and in particular to a hollow coil bending machine. Background Art

[0002] One-piece molded inductors, also called one-piece inductors, powder alloy inductors or molded inductors, include magnets and coil windings. The magnets bury the coil windings inside the metal magnetic powder and die-cast them. The commonly used surface mount device (SMD) pins are directly formed on the surface of the product as the lead-out pins of the coil winding body. As the main frequency of the central processing unit (CPU) of computers and mobile phones increases, the requirements for stable power supply and filtering are also increasing. One-piece molded inductors can work for a long time under high current conditions while providing stable power supply to the CPU. In addition, the good material properties of one-piece molded inductors and the special structural design make the inductor structure more stable, with lower impedance, better seismic performance, and high conversion efficiency, and they are beginning to be more widely used.

[0003] The main processes for manufacturing one-piece molded inductors include powder making, winding, spot welding, molding, baking, painting, bending, appearance inspection, package testing, etc. Among them, the bending process refers to bending the two pins of the inductor to a predetermined angle so that the inductor can be installed in other devices. In the prior art, the inductor bending device includes a positioning fixture for positioning the inductor body, a bending push block for bending the inductor pins, and a driving component for driving the bending push block to move; the driving component drives the bending push block to move in a straight line, and the bending push block drives the inductor pins to move to complete the bending operation.

[0004] However, in the existing inductor bending device, the inductor pins are bent at one time. Since the inductor pins are basically made of copper wire material, if the bending time of the inductor pins is short, the inductor pins may rebound to a certain angle after bending, resulting in a deviation between the actual bending angle and the preset bending angle, and the yield rate of the inductor pins after bending is low; if the bending time of the inductor pins is long, the processing efficiency of the inductor bending device will be reduced. Summary of the invention

[0005] Therefore, an object of the present invention is to provide a hollow coil bending machine, which can improve the yield rate of inductor pin bending process without affecting the efficiency of inductor bending processing.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A hollow coil bending machine comprises a base and a rotating disk mechanism, a creasing mechanism and a bending mechanism installed on the base;

[0008] The rotating disk mechanism comprises a rotating disk and a rotating disk driving device for driving the rotating disk to rotate; an inductor placement fixture for placing an inductor is provided on the outer periphery of the rotating disk, and the inductor placement fixture is provided with a receiving groove for accommodating the inductor body, and a notch that penetrates the groove side wall of the receiving groove so that the inductor pin extends to the outside of the inductor placement fixture;

[0009] The indentation mechanism and the bending mechanism are sequentially arranged along the outer circumference of the rotating disk;

[0010] The indentation mechanism comprises a pre-pressing device, which comprises a pair of pre-pressing blocks arranged opposite to each other, and a first driving member driving the pair of pre-pressing blocks to move closer to each other to clamp the inductor pins or move away from each other to loosen the inductor pins, wherein a cutting blade is provided on a side of one of the pre-pressing blocks facing the other pre-pressing block; when the pair of pre-pressing blocks move closer to each other under the driving action of the first driving member, the cutting blade cuts an indentation on the inductor pin between the pair of pre-pressing blocks;

[0011] The bending mechanism includes a positioning device and a bending device, the positioning device includes a pair of positioning blocks arranged relatively to each other, and a second driving member driving the pair of positioning blocks to move closer to each other to clamp the inductor pins located between the inductor body and the indentation or move away from each other to loosen the inductor pins; the bending device includes a bending forming component located on the side of the pair of positioning blocks facing away from the inductor placement fixture, and a bending driving component driving the bending forming component to move so that the bending forming component pushes the inductor pins to bend with the indentation as the bending point.

[0012] Furthermore, the first driving member includes a first cylinder and a second cylinder at the same height position and with the same telescopic direction; the pre-pressing device includes a first slider driven by the first cylinder to perform horizontal linear motion, a second slider driven by the second cylinder to perform horizontal linear motion, a first pre-pressing strip fixedly connected to the first slider, and a pair of second pre-pressing strips fixedly connected to the second slider; the first pre-pressing strip and the pair of the second pre-pressing strips are parallel, the first pre-pressing strip is located between the pair of the second pre-pressing strips, and there is a first gap between the first pre-pressing strip and the pair of the second pre-pressing strips; the pair of pre-pressing blocks are respectively a first pre-pressing block and a second pre-pressing block, the first pre-pressing block is fixed on the side of the first pre-pressing strip facing the second pre-pressing strip, and the second pre-pressing block is fixed on the side of the second pre-pressing strip facing the first pre-pressing strip; the first pre-pressing block and the corresponding second pre-pressing block cooperate to clamp the inductor pin at the first interval position and cut a notch on the inductor pin.

[0013] Furthermore, a plurality of the first pre-compression blocks are arranged along the length direction of the first pre-compression strip, and a plurality of the second pre-compression blocks are arranged along the length direction of the second pre-compression strip, and each of the first pre-compression blocks corresponds to one of the second pre-compression blocks; an upper end surface of the first pre-compression block is higher than an upper end surface of the first pre-compression strip, and an upper end surface of the second pre-compression block is higher than an upper end surface of the second pre-compression strip; a plurality of the first pre-compression blocks and a plurality of the second pre-compression blocks form a first strip-shaped groove above the first pre-compression strip, and the inductor placement jig is suitable for being embedded in the first strip-shaped groove.

[0014] Furthermore, the indentation mechanism also includes a first lifting device installed on the base, and the pre-pressing device is installed on the first lifting device; during the process of the first lifting device driving the lifting, the pre-pressing device has a pre-pressing working position in which a pair of pre-pressing blocks thereon are located on opposite sides of the inductor pin so as to clamp the inductor pin, and a pre-pressing preparation position in which a pair of pre-pressing blocks thereon are located below the inductor placement jig so as to rotate the rotating disk.

[0015] Furthermore, the second driving member includes a third cylinder and a fourth cylinder at the same height position and in the same telescopic direction; the positioning device includes a third slider driven by the third cylinder to perform horizontal linear motion, a fourth slider driven by the fourth cylinder to perform horizontal linear motion, a first positioning bar fixedly connected to the third slider, and a pair of second positioning bars fixedly connected to the fourth slider; the first positioning bar and the pair of the second positioning bars are parallel, the first positioning bar is located between the pair of the second positioning bars, and there is a second interval between the first positioning bar and the pair of the second positioning bars; the pair of positioning blocks are respectively a first positioning block and a second positioning block, the first positioning block is fixed on opposite sides of the first positioning bar, the second positioning block is fixed on the side of the second positioning bar facing the first positioning bar, and the first positioning block and the corresponding second positioning block cooperate at the second interval position to clamp the inductor pin located between the inductor body and the indentation.

[0016] Furthermore, a plurality of the first positioning blocks are arranged along the length direction of the first positioning strip, a plurality of the second positioning blocks are arranged along the length direction of the second positioning strip, and each of the first positioning blocks corresponds to one of the second positioning blocks; an upper end surface of the first positioning block is higher than an upper end surface of the first positioning strip, and an upper end surface of the second positioning block is higher than an upper end surface of the second positioning strip; a plurality of the first positioning blocks and a plurality of the second positioning blocks form a second strip-shaped groove above the first positioning strip, and the inductor placement jig is suitable for being embedded in the second strip-shaped groove.

[0017] Furthermore, an inclined guide surface for limiting the bending angle of the inductor pin is provided on a side of the second positioning block facing away from the second strip groove, and the bending forming component pushes the inductor pin to bend along the guiding direction of the inclined guide surface under the drive of the bending driving component.

[0018] Furthermore, the bending drive assembly includes a fifth cylinder, a first slide driven by the fifth cylinder to perform horizontal linear motion along the side-by-side direction of the first positioning block and the second positioning block, a sixth cylinder installed on the first slide, and a second slide driven by the sixth cylinder to perform horizontal linear motion in a direction perpendicular to the length of the first positioning strip; the bending and forming assembly includes a bending and forming push block fixed on the second slide, and a bearing follower connected to one end of the bending and forming push block close to the second positioning block, the bearing follower being rotatably connected to the bending and forming push block around a vertically arranged rotating shaft; when the bearing follower moves along the length direction of the first positioning strip, the bearing follower pushes the inductor pin to bend with the indentation as the bending point.

[0019] Furthermore, the bending mechanism also includes a second lifting device installed on the base, and the positioning device and the bending device are both installed on the second lifting device; during the process of the second lifting device driving the lifting, the positioning device has a positioning working position in which a pair of positioning blocks thereon are located on opposite sides of the inductor pins so as to clamp the inductor pins, and a positioning preparation position in which a pair of positioning blocks thereon are located below the inductor placement jig so as to rotate the rotating disk.

[0020] Furthermore, the indentation mechanism further includes a first pressing device for pressing the inductor body downwards into the receiving groove; the bending mechanism further includes a second pressing device for pressing the inductor body downwards into the receiving groove.

[0021] The technical solution of the present invention is that the hollow coil bending machine provided by the present invention, during the bending process of the inductor pin, the inductor placement jig on the rotating disk is first located at a position corresponding to the indentation mechanism, the inductor is placed in the receiving groove of the inductor placement jig, the inductor pin of the inductor extends out of the inductor placement jig from the notch of the groove side wall of the receiving groove, and a pair of pre-pressing blocks of the pre-pressing device approach each other and clamp the inductor pin under the driving action of the first driving member, and at the same time, the cutting blades on the pre-pressing blocks cut indentations on the inductor pin; then the rotating disk is driven by the rotating disk driving device to rotate a certain angle, the inductor placement jig on the rotating disk rotates with the rotating disk to a position corresponding to the bending mechanism, and a pair of positioning blocks of the positioning device approach each other and clamp the inductor pin located between the inductor body and the indentation under the driving action of the second driving member; then the bending forming component of the bending device pushes the unclamped part of the inductor pin to bend with the indentation as the bending point under the action of the bending driving component, thereby realizing the automatic bending of the inductor pin. This hollow coil bending machine first processes a dent on the inductor pin, and then bends the inductor pin using the dent as the bending point. After the inductor pin is bent, it is not easy to have a deviation between the actual bending angle and the preset bending angle due to springback. Without significantly affecting the inductor bending efficiency, the yield rate of the inductor pin after bending is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The three-dimensional structure of the hollow coil bending machine in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 2 The three-dimensional structure of the hollow coil bending machine in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0026] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0027] Figure 5 It is a schematic diagram of the structure of multiple inductors on an inductor placement jig in an embodiment of the present invention;

[0028] Figure 6A schematic diagram of the structure of an inductor placement jig in an embodiment of the present invention;

[0029] Figure 7 is a schematic diagram of the structure of the inductor pin before bending in an embodiment of the present invention;

[0030] Figure 8 It is a structural schematic diagram of an inductor pin in an embodiment of the present invention when a notch is cut by an indentation mechanism;

[0031] Fig. 9 is a schematic diagram of the structure of the inductor pin after bending in an embodiment of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the pre-pressing device in an embodiment of the present invention performing indentation on the inductor pins on the inductor placement jig;

[0033] Fig.11 It is a schematic diagram of the structure of the first sliding block, the second sliding block, the first pre-compression strip and the second pre-compression strip in an embodiment of the present invention;

[0034] Fig.12 is a schematic diagram of the structure when the first sliding block and the second sliding block are away from each other in an embodiment of the present invention;

[0035] Fig.13 It is a structural schematic diagram of the positioning device and the bending device in the embodiment of the present invention bending the inductor pins on the inductor placement fixture;

[0036] Fig.14 It is a structural schematic diagram of the positioning device in an embodiment of the present invention positioning the inductor pins on the inductor placement fixture;

[0037] Fig.15 It is a schematic diagram of the structure of the third slider, the fourth slider, the first positioning bar and the second positioning bar in an embodiment of the present invention;

[0038] Fig.16 Schematic diagram of the structure when the third slider and the fourth slider are away from each other in the embodiment of the present invention.

[0039] Description of the accompanying drawings: 1. base; 11. first frame; 12. second frame; 2. rotating disk mechanism; 21. rotating disk; 22. rotating disk driving device; 23. inductor placement fixture; 231. receiving groove; 232. notch; 3. indentation mechanism; 311. first cylinder; 312. second cylinder; 313. first slider; 314. second slider; 315. first pre-pressing strip; 3151. first pre-pressing block; 316. second pre-pressing strip; 3161. second pre-pressing block; 317. first strip groove; 318. cutting blade; 32. first lifting device; 33. first clamping device; 4. bending mechanism; 41. positioning device; 413. third slider; 41 4. Fourth slider; 415. First positioning strip; 4151. First positioning block; 416. Second positioning strip; 4161. Second positioning block; 417. Second strip groove; 418. Inclined guide surface; 42. Bending device; 421. Fifth cylinder; 422. First slide; 423. Sixth cylinder; 424. Second slide; 425. Bending and forming push block; 426. Bearing follower; 43. Second lifting device; 44. Second clamping device; 5. Inductor; 51. Inductor body; 52. Inductor pin; 52a. Inductor pin portion between inductor body and indentation; 52b. Unclamped portion of inductor pin; 53. Indentation; 6. Loading mechanism; 7. Unloading mechanism. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figure 1-Figure 4 A hollow coil bending machine shown in the figure includes a base 1 and a rotating disk mechanism 2, an indentation mechanism 3, a bending mechanism 4, a loading mechanism 6 and a unloading mechanism 7 installed on the base 1. Among them, the rotating disk mechanism 2 includes a rotating disk driving device 22 installed in the middle of the base 1, and a rotating disk 21 driven to rotate by the rotating disk driving device 22. The rotating disk driving device 22 is an electric driving device that drives the motor shaft to rotate by a conventional motor, which is not described here. A recess is provided on the outer periphery of the rotating disk 21, and an inductor placement fixture 23 for placing the inductor 5 is fixed on the recess. The indentation mechanism 3 and the bending mechanism 4 are arranged in sequence along the outer periphery of the rotating disk 21. A first frame 11 and a second frame 12 located on opposite sides of the rotating disk 21 are provided on the base 1; the loading mechanism 6 is installed on the first frame 11, and the unloading mechanism 7 is installed on the second frame 12. The loading mechanism 6 is used to transfer the unbent inductor pins 52 on the loading disk to the position of the rotating disk 21 corresponding to the indentation mechanism 3. The indentation mechanism 3 is used to cut a notch 53 on the inductor pin 52. The bending mechanism 4 is used to drive the inductor pin 52 to bend with the notch 53 as the bending point. The unloading mechanism 7 is used to transfer the inductor pin 52 after bending to the unloading disk. It should be noted that at least three inductor placement jigs 23 are arranged along the circumference of the rotating disk 21. Multiple inductors 5 on three different inductor placement jigs 23 can simultaneously perform inductor pin indentation operations, inductor pin bending operations, and inductor unloading operations, thereby improving the automated production efficiency of the hollow coil bending machine.

[0044] like Figure 5 and Figure 6 As shown, the inductor placement jig 23 is in the shape of a long strip, and is provided with four receiving grooves 231 arranged side by side, and the opposite side walls of the inductor placement jig 23 are provided with notches 232 that intersect with the groove side walls of the receiving grooves 231. The inductor 5 includes a cylindrical inductor body 51 formed by spirally winding enameled wire, and a pair of inductor pins 52 extending from both ends of the inductor body 51. The inductor body 51 is accommodated in the receiving groove 231, and the pair of inductor pins 52 extend out of the inductor placement jig 23 from the notches 232 respectively.

[0045] like Figure 1-Figure 4As shown, the indentation mechanism 3 includes a first lifting device 32 installed on the base 1, a pre-pressing device driven by the first lifting device 32 to perform vertical lifting movement, and a first clamping device 33 installed on the second frame 12 for pressing the inductor body 51 downward into the receiving groove 231 of the inductor placement fixture 23. The pre-pressing device includes a first driving member fixed to the first lifting device 32, and a pair of pre-pressing blocks driven by the first driving member to move closer to each other to clamp the inductor pin 52 or away from each other to loosen the inductor pin 52. At least one of the pre-pressing blocks is provided with a cutting blade 318 on the side facing the other pre-pressing block, and when the pair of pre-pressing blocks approach each other under the driving action of the first driving member, the cutting blade 318 cuts a notch 53 on the inductor pin 52 between the pair of pre-pressing blocks. The shape of the inductor pin 52 before bending is as follows: Figure 7 As shown, the shape of the inductor pin 52 after the indentation 53 is cut by the indentation mechanism 3 is as follows Figure 8 shown.

[0046] like Figure 1-Figure 4 As shown, the bending mechanism 4 includes a second lifting device 43 installed on the base 1, a positioning device 41 and a bending device 42 driven by the second lifting device 43 to perform vertical lifting movement, and a second pressing device 44 installed on the first frame 11 for pressing the inductor body 51 downward into the receiving groove 231 of the inductor placement fixture 23. The positioning device 41 includes a second driving member fixed on the second lifting device 43, and a pair of positioning blocks driven by the second driving member to move closer to each other to clamp the inductor pin portion 52a located between the inductor body and the indentation or to move away from each other to release the inductor pin 52; the pair of positioning blocks are used to clamp and position the inductor pin portion 52a between the inductor body and the indentation. The bending device 42 includes a bending forming component located on the side of the pair of positioning blocks facing away from the inductor placement fixture 23, and a bending driving component that drives the bending forming component to move so that the bending forming component pushes the unclamped portion 52b of the inductor pin to bend with the indentation 53 as the bending point. The shape of the inductor pin 52 after being bent by the bending mechanism 4 is as follows: Fig. 9 shown.

[0047] During the bending process of the inductor 5, the loading mechanism 6 transfers the inductor 5 with multiple unbent inductor pins 52 on the loading disk to the inductor placement fixture 23 of the rotating disk 21, and the first lifting device 32 drives the pre-pressing device to rise. The pre-pressing blocks arranged in pairs on the pre-pressing device rise from the pre-pressing preparation position located below the rotating disk 21 to the pre-pressing working position with the same height as the inductor pins 52 on the inductor placement fixture 23, and at this time, the pre-pressing blocks arranged in pairs are located on opposite sides of the inductor pins 52; then the first clamping device 33 is pressed by the manipulator on the second frame 12. Move to the top of the pre-pressing device, the first clamping device 33 drives the four first clamping heads to move downward, and the four first clamping heads are respectively pressed on the top of the four inductor bodies 51 to prevent the inductor bodies 51 from loosening during the indentation process; then the first driving member drives the paired pre-pressing blocks to approach each other, and the paired pre-pressing blocks clamp the inductor pins 52 located therebetween, and the cutting blades 318 on the pre-pressing blocks cut out indentations 53 on the inductor pins 52 between a pair of pre-pressing blocks, thereby completing the cutting operation of the indentations 53 before the inductor pins 52 are bent. Afterwards, the rotating disk driving device 22 drives the rotating disk 21 to rotate 90 degrees, and the inductor placement fixture 23 on the rotating disk 21 moves to the position corresponding to the bending mechanism 4, and the second lifting device 43 drives the positioning device 41 and the bending device 42 to rise as a whole, and the positioning blocks arranged in pairs on the positioning device 41 rise from the positioning preparation position located below the rotating disk 21 to the positioning working position with the same height as the inductor pin 52 on the inductor placement fixture 23, and at this time, the positioning blocks arranged in pairs are located on opposite sides of the inductor pin 52; then the second clamping device 44 moves to the upper side of the positioning device 41 under the action of the manipulator on the first frame 11 The second clamping device 44 drives the four second clamping heads to move downward, and the four second clamping heads are respectively pressed on the top of the four inductor bodies 51 to prevent the inductor bodies 51 from loosening during the bending process; then the second driving member drives the paired positioning blocks to approach each other, and the paired pre-pressing blocks clamp and position the inductor pin part 52a between the inductor body and the indentation; then the bending driving component drives the bending forming component to perform horizontal linear motion, and the unclamped part 52b of the inductor pin is bent with the indentation 53 as the bending point under the push of the bending forming component, completing the bending operation of the inductor pin 52 after the indentation. Finally, the rotating disk driving device 22 drives the rotating disk 21 to continue rotating a certain angle in the same direction, and the unloading mechanism 7 on the second frame 12 transfers the inductor 5 after bending to the unloading disk, and then performs subsequent inductor pin 52 detection operations. After unloading, the rotating disk 21 can continue to rotate to the position of the pre-pressing device, and continue to perform the inductor pin bending operation of the next batch of inductors 5. In this way, full automation of the inductor pin 52 bending process is achieved, which is conducive to improving production efficiency.

[0048] In some embodiments, Figure 1 , Figure 3 , Fig.10 , Fig.11 and Fig.12 As shown, the first driving member includes a first cylinder 311 and a second cylinder 312 at the same height position and in the same telescopic direction, and the first cylinder 311 and the second cylinder 312 are both fixed above the first lifting device 32. The pre-pressing device includes a first slider 313 driven by the first cylinder 311 to perform horizontal linear motion, a second slider 314 driven by the second cylinder 312 to perform horizontal linear motion, a first pre-pressing strip 315 fixedly connected to the first slider 313, and a pair of second pre-pressing strips 316 fixedly connected to the second slider 314. The first pre-pressing strip 315 and the pair of second pre-pressing strips 316 are parallel, the first pre-pressing strip 315 is located between the pair of second pre-pressing strips 316, and there is a first interval between the first pre-pressing strip 315 and the pair of second pre-pressing strips 316. The pre-compression blocks arranged in pairs are respectively a first pre-compression block 3151 and a second pre-compression block 3161. The first pre-compression block 3151 is fixed on the side of the first pre-compression strip 315 facing the second pre-compression strip 316, and the second pre-compression block 3161 is fixed on the side of the second pre-compression strip 316 facing the first pre-compression strip 315. The first pre-compression block 3151 and the corresponding second pre-compression block 3161 cooperate to clamp the inductor pin 52 at the first interval position, and the cutting blade 318 on the first pre-compression block 3151 and / or the second pre-compression block 3161 cuts a notch 53 on the inductor pin 52. In an alternative embodiment, the first driving member can also use a driving member to drive the pre-compression blocks arranged in pairs to move closer to or away from each other, for example, a motor drives a bidirectional screw to rotate to drive a pair of pre-compression blocks to move closer to or away from each other.

[0049] In some embodiments, four first pre-pressing blocks 3151 are arranged along the length direction of the first pre-pressing strip 315, and four second pre-pressing blocks 3161 are arranged along the length direction of the second pre-pressing strip 316. Each first pre-pressing block 3151 is correspondingly provided with a second pre-pressing block 3161; the upper end surface of the first pre-pressing block 3151 is higher than the upper end surface of the first pre-pressing strip 315, and the upper end surface of the second pre-pressing block 3161 is higher than the upper end surface of the second pre-pressing strip 316; the eight first pre-pressing blocks 3151 and the eight second pre-pressing blocks 3161 form a first strip groove 317 above the first pre-pressing strip 315, and the inductor placement jig 23 is suitable for being embedded in the first strip groove 317. In this way, the first pre-pressing strip 315 and a pair of second pre-pressing strips 316 can position the two sides of the inductor placement jig 23, improve the stability of the inductor placement jig 23, and further improve the consistency of the positions of the cutting notches 53 of the four inductor pins 52 on the inductor placement jig 23. It can be understood here that the number of pairs of the first pre-pressing blocks 3151 and the second pre-pressing blocks 3161 is not limited to eight pairs, and the actual number is adaptively selected according to the number of inductors 5 on the inductor placement fixture 23 .

[0050] In some embodiments, Figure 2 , Figure 4 , Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, the second driving member includes a third cylinder and a fourth cylinder (not shown) at the same height position and the same telescopic direction. The structure of the second driving member is the same as that of the first driving member. The second driving member includes two cylinders at the same height position and the same telescopic direction. The positioning device 41 includes a third slider 413 driven by the third cylinder to make horizontal linear motion, a fourth slider 414 driven by the fourth cylinder to make horizontal linear motion, a first positioning bar 415 fixedly connected to the third slider 413, and a pair of second positioning bars 416 fixedly connected to the fourth slider 414. The first positioning bar 415 is parallel to the pair of second positioning bars 416, and the first positioning bar 415 is located between the pair of second positioning bars 416, and there is a second interval between the first positioning bar 415 and the pair of second positioning bars 416. A pair of positioning blocks are respectively a first positioning block 4151 and a second positioning block 4161. The first positioning block 4151 is fixed on opposite sides of the first positioning strip 415, and the second positioning block 4161 is fixed on the side of the second positioning strip 416 facing the first positioning strip 415. The first positioning block 4151 and the corresponding second positioning block 4161 cooperate to clamp the inductor pin portion 52a located between the inductor body and the indentation at the second interval position.

[0051] In some embodiments, Fig.13 , Fig.14 , Fig.15 and Fig.16 As shown, four first positioning blocks 4151 are arranged along the length direction of the first positioning strip 415, and four second positioning blocks 4161 are arranged along the length direction of the second positioning strip 416. Each first positioning block 4151 is correspondingly provided with a second positioning block 4161; the upper end surface of the first positioning block 4151 is higher than the upper end surface of the first positioning strip 415, and the upper end surface of the second positioning block 4161 is higher than the upper end surface of the second positioning strip 416; the eight first positioning blocks 4151 and the eight second positioning blocks 4161 form a second strip groove 417 above the first positioning strip 415, and the inductor placement fixture 23 is suitable for being embedded in the second strip groove 417. The second positioning block 4161 is provided with an inclined guide surface 418 for limiting the bending angle of the inductor pin 52 on one side facing away from the second strip groove 417, and the bending forming component, driven by the bending driving component, pushes the unclamped portion 52b of the inductor pin to bend along the guiding direction of the inclined guide surface 418.

[0052] In some embodiments, Figure 2 , Figure 4 , Fig.13 , Fig.14, Fig.15 and Fig.16 As shown, the bending drive assembly includes a pair of fifth cylinders 421 fixed above the second lifting device 43, a first slide 422 driven by the fifth cylinder 421 to perform horizontal linear motion along the parallel direction of the first positioning block 4151 and the second positioning block 4161, a sixth cylinder 423 installed on the first slide 422, and a second slide 424 driven by the sixth cylinder 423 to perform horizontal linear motion along the direction perpendicular to the length of the first positioning bar 415. The pair of fifth cylinders 421 are at the same height position, each fifth cylinder 421 is connected to a first slide 422, and the pair of first slides 422 and the pair of second slides 424 are respectively located on opposite sides of the positioning device 41. The bending forming assembly includes four groups of bending forming push blocks 425 fixed on the second slide 424, and a bearing follower 426 connected to one end of each bending forming push block 425 close to the second positioning block 4161. The bearing follower 426 is rotatably connected to the bending and forming push block 425 around a vertically arranged rotating shaft; when the second slide 424 moves along the length direction of the first positioning strip 415, the four bearing followers 426 respectively push the unclamped parts 52b of the four inductor pins to bend with the indentation 53 as the bending point.

[0053] In summary, in the hollow coil bending machine provided by the present invention, during the bending process of the inductor pin 52, the inductor placement jig 23 on the rotating disk 21 is first located at a position corresponding to the indentation mechanism 3, and the inductor 5 is placed in the receiving groove 231 of the inductor placement jig 23, and the inductor pin 52 of the inductor 5 extends out of the inductor placement jig 23 from the notch 232 of the groove side wall of the receiving groove 231, and the first pre-pressing block 3151 and the second pre-pressing block 3161 arranged in pairs on the pre-pressing device approach each other and clamp the inductor pin 52 under the driving action of the first driving member, and at the same time, the cutting blade 318 on the first pre-pressing block 3151 and / or the second pre-pressing block 3161 is pressed on the inductor pin A notch 53 is cut on 52; then the rotating disk 21 is driven by the rotating disk driving device 22 to rotate a certain angle, and the inductor placement fixture 23 on the rotating disk 21 rotates with the rotating disk 21 to a position corresponding to the bending mechanism 4, and the first positioning block 4151 and the second positioning block 4161 arranged in pairs on the positioning device 41 approach each other and clamp the inductor pin part 52a between the inductor body and the notch under the driving action of the second driving member; then the bending forming component of the bending device 42 pushes the unclamped part 52b of the inductor pin to bend with the notch 53 as the bending point under the action of the bending driving component, thereby realizing the automatic bending of the inductor pin 52. This hollow coil bending machine first processes a notch 53 on the inductor pin 52, and then bends the inductor pin 52 using the notch 53 as a bending point. This makes it less likely that the actual bending angle and the preset bending angle will deviate from each other due to springback after the inductor pin 52 is bent. This improves the yield rate of the inductor pin 52 after bending without significantly affecting the bending efficiency of the inductor 5.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A hollow coil bending machine, characterized in that: It comprises a base (1) and a rotating disk mechanism (2), an indentation mechanism (3), and a bending mechanism (4) installed on the base (1); The rotating disk mechanism (2) comprises a rotating disk (21) and a rotating disk driving device (22) for driving the rotating disk (21) to rotate; an inductor placement jig (23) for placing an inductor (5) is provided on the outer periphery of the rotating disk (21); the inductor placement jig (23) is provided with a receiving groove (231) for accommodating an inductor body (51), and a notch (232) which is connected to the groove side wall of the receiving groove (231) so that the inductor pin (52) extends to the outside of the inductor placement jig (23); The indentation mechanism (3) and the bending mechanism (4) are arranged in sequence along the outer circumference of the rotating disk (21); The indentation mechanism (3) comprises a pre-pressing device, the pre-pressing device comprising a pair of pre-pressing blocks arranged opposite to each other, and a first driving member driving the pair of pre-pressing blocks to move closer to each other to clamp the inductor pin (52) or move away from each other to loosen the inductor pin (52), wherein a cutting blade (318) is provided on a side of one of the pre-pressing blocks facing the other pre-pressing block; when the pair of pre-pressing blocks move closer to each other under the driving action of the first driving member, the cutting blade (318) cuts a notch (53) on the inductor pin (52) between the pair of pre-pressing blocks; The bending mechanism (4) comprises a positioning device (41) and a bending device (42); the positioning device (41) comprises a pair of positioning blocks arranged opposite to each other, and a second driving member driving the pair of positioning blocks to move closer to each other to clamp the inductor pin portion located between the inductor body (51) and the indentation (53) or to move away from each other to loosen the inductor pin (52); the bending device (42) comprises a bending forming component located on the side of the pair of positioning blocks facing away from the inductor placement fixture (23), and a bending driving component driving the bending forming component to move so that the bending forming component pushes the inductor pin (52) to bend with the indentation (53) as a bending point.

2. The hollow coil bending machine according to claim 1, characterized in that: The first driving member comprises a first cylinder (311) and a second cylinder (312) which are at the same height and have the same telescopic direction; the pre-pressing device comprises a first slider (313) driven by the first cylinder (311) to perform horizontal linear motion, a second slider (314) driven by the second cylinder (312) to perform horizontal linear motion, a first pre-pressing strip (315) fixedly connected to the first slider (313), and a pair of second pre-pressing strips (316) fixedly connected to the second slider (314); the first pre-pressing strip (315) and the pair of the second pre-pressing strips (316) are parallel, and the first pre-pressing strip (315) is located between the pair of the second pre-pressing strips (316). There is a first interval between the first pre-compression strip (315) and the pair of the second pre-compression strips (316); the pair of the pre-compression blocks are respectively a first pre-compression block (3151) and a second pre-compression block (3161); the first pre-compression block (3151) is fixed on the side of the first pre-compression strip (315) facing the second pre-compression strip (316); the second pre-compression block (3161) is fixed on the side of the second pre-compression strip (316) facing the first pre-compression strip (315); the first pre-compression block (3151) and the corresponding second pre-compression block (3161) cooperate to clamp the inductor pin (52) at the first interval position and cut a notch (53) on the inductor pin (52).

3. The hollow coil bending machine according to claim 2, characterized in that: A plurality of the first pre-compression blocks (3151) are arranged along the length direction of the first pre-compression strip (315), and a plurality of the second pre-compression blocks (3161) are arranged along the length direction of the second pre-compression strip (316), and each of the first pre-compression blocks (3151) corresponds to one of the second pre-compression blocks (3161); the upper end surface of the first pre-compression block (3151) is higher than the upper end surface of the first pre-compression strip (315), and the upper end surface of the second pre-compression block (3161) is higher than the upper end surface of the second pre-compression strip (316); the plurality of the first pre-compression blocks (3151) and the plurality of the second pre-compression blocks (3161) form a first strip-shaped groove (317) above the first pre-compression strip (315), and the inductor placement jig (23) is suitable for being embedded in the first strip-shaped groove (317).

4. The hollow coil bending machine according to claim 1, characterized in that: The indentation mechanism (3) further comprises a first lifting device (32) mounted on the base (1), and the pre-pressing device is mounted on the first lifting device (32); during the process of the first lifting device (32) being driven to lift, the pre-pressing device has a pre-pressing working position in which a pair of pre-pressing blocks on the pre-pressing device are located at opposite sides of the inductor pin (52) so as to clamp the inductor pin (52), and a pre-pressing preparation position in which a pair of pre-pressing blocks on the pre-pressing device are located below the inductor placement jig (23) so as to rotate the rotating disk (21).

5. The hollow coil bending machine according to claim 1, characterized in that: The second driving member comprises a third cylinder and a fourth cylinder at the same height position and in the same telescopic direction; the positioning device (41) comprises a third slider (413) driven by the third cylinder to perform horizontal linear motion, a fourth slider (414) driven by the fourth cylinder to perform horizontal linear motion, a first positioning bar (415) fixedly connected to the third slider (413), and a pair of second positioning bars (416) fixedly connected to the fourth slider (414); the first positioning bar (415) and the pair of second positioning bars (416) are parallel, the first positioning bar (415) is located between the pair of second positioning bars (416), and the first positioning bar (415) is located between the pair of second positioning bars (416). There is a second interval between the first positioning strip (415) and the pair of the second positioning strips (416); the pair of positioning blocks are respectively a first positioning block (4151) and a second positioning block (4161); the first positioning block (4151) is fixed on two opposite sides of the first positioning strip (415); the second positioning block (4161) is fixed on a side of the second positioning strip (416) facing the first positioning strip (415); the first positioning block (4151) and the corresponding second positioning block (4161) cooperate at the second interval position to clamp the inductor pin portion located between the inductor body (51) and the indentation (53).

6. The hollow coil bending machine according to claim 5, characterized in that: A plurality of the first positioning blocks (4151) are arranged along the length direction of the first positioning strip (415), and a plurality of the second positioning blocks (4161) are arranged along the length direction of the second positioning strip (416), and each of the first positioning blocks (4151) corresponds to one of the second positioning blocks (4161); the upper end surface of the first positioning block (4151) is higher than the upper end surface of the first positioning strip (415), and the upper end surface of the second positioning block (4161) is higher than the upper end surface of the second positioning strip (416); the plurality of the first positioning blocks (4151) and the plurality of the second positioning blocks (4161) form a second strip-shaped groove (417) above the first positioning strip (415), and the inductor placement jig (23) is suitable for being embedded in the second strip-shaped groove (417).

7. The hollow coil bending machine according to claim 6, characterized in that: An inclined guide surface (418) for limiting the bending angle of the inductor pin (52) is provided on the side of the second positioning block (4161) facing away from the second strip-shaped groove (417); the bending forming component, driven by the bending driving component, pushes the inductor pin (52) to bend along the guiding direction of the inclined guide surface (418).

8. The hollow coil bending machine according to claim 5, characterized in that: The bending drive assembly comprises a fifth cylinder (421), a first slide (422) driven by the fifth cylinder (421) to perform horizontal linear motion along the parallel direction of the first positioning block (4151) and the second positioning block (4161), a sixth cylinder (423) installed on the first slide (422), and a second slide (424) driven by the sixth cylinder (423) to perform horizontal linear motion along a direction perpendicular to the length of the first positioning strip (415); the bending forming assembly comprises a first slide (424) fixed on the second slide (424), and a bearing follower (426) connected to one end of the bending and forming push block (425) close to the second positioning block (4161), wherein the bearing follower (426) is rotatably connected to the bending and forming push block (425) around a vertically arranged rotating shaft; when the bearing follower (426) moves along the length direction of the first positioning strip (415), the bearing follower (426) pushes the inductor pin (52) to bend with the indentation (53) as the bending point.

9. The hollow coil bending machine according to claim 1, characterized in that: The bending mechanism (4) further comprises a second lifting device (43) mounted on the base (1), and the positioning device (41) and the bending device (42) are both mounted on the second lifting device (43); during the process of the second lifting device (43) driving the lifting device, the positioning device (41) has a positioning working position in which a pair of positioning blocks on the positioning device (41) are located at opposite sides of the inductor pin (52) so as to clamp the inductor pin (52), and a positioning preparation position in which a pair of positioning blocks on the positioning device (41) are located below the inductor placement jig (23) so as to rotate the rotating disk (21).

10. The hollow coil bending machine according to claim 1, characterized in that: The indentation mechanism (3) further comprises a first pressing device (33) for pressing the inductor body (51) downwards into the receiving groove (231); and the bending mechanism (4) further comprises a second pressing device (44) for pressing the inductor body (51) downwards into the receiving groove (231).

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