CN114530326A

CN114530326A - Automatic welding device for chip inductor and machining method thereof

Info

Publication number: CN114530326A
Application number: CN202210200440.6A
Authority: CN
Inventors: 刘潜; 刘猛; 王凯; 朱全超
Original assignee: Huaian Wenshan Electronic Co ltd
Current assignee: Huaian Wenshan Electronic Co ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-05-24
Anticipated expiration: 2042-03-02
Also published as: CN114530326B

Abstract

The invention provides an automatic welding device for a chip inductor, which comprises a wire hooking mechanism and a spot welding mechanism, wherein the wire hooking mechanism is arranged on the spot welding mechanism; the wire hooking mechanism is positioned above the chip inductor and used for hooking the cable from the end part of the magnetic core and pulling and moving the cable to the position above the electrode close to the end part to enable the cable to be tightly attached to the electrode to be welded, and the wire hooking mechanism comprises a first driving part and a hook mounted on the first driving part; the spot welding mechanism is located above the electrode to be welded and comprises a second driving piece and a spot welding machine installed on the second driving piece, and the second driving piece drives the spot welding machine to move downwards to weld the coil on the target electrode. The invention solves the problem that the chip inductor is difficult to realize automatic welding in a small space.

Description

Automatic welding device for chip inductor and machining method thereof

Technical Field

The invention belongs to the technical field of inductor production, and particularly relates to an automatic welding device for a chip inductor.

Background

The winding chip inductor is usually made by winding a tiny i-shaped magnetic core, welding and molding, and then plastic packaging. The inductor has excellent electrical performance, high inductance value L and quality factor Q, is suitable for large current to pass through, has high reliability and is more suitable for high-frequency use.

When the existing winding type chip type electric induction is in production, the end part of a coil needs to be welded on an electrode, the end part of a cable needs to be compressed during welding, the cable cannot shake, the infirm connection caused by welding deviation is prevented, the operation precision cannot be guaranteed during manual pressing due to the small size of the chip type inductor, and the working efficiency is low; the automatic pressing is insufficient in the operation space of the equipment, and the requirement for realizing automatic welding in a small space is difficult to meet at the same time.

Disclosure of Invention

The invention aims to provide an automatic welding device for a chip inductor, which aims to solve the problem that automatic welding of the chip inductor in a small space is difficult to realize.

The invention provides the following technical scheme:

an automatic welding device for a chip inductor is a winding inductor and comprises an I-shaped magnetic core, electrodes positioned at the tops of two sides of the magnetic core and a coil wound on the magnetic core, wherein two ends of the coil are welded on the two electrodes; the automatic welding device comprises a wire hooking mechanism and a spot welding mechanism;

the wire hooking mechanism is positioned above the chip inductor and used for hooking the cable from the end part of the magnetic core and pulling and moving the cable to the position above the electrode close to the end part to enable the cable to be tightly attached to the electrode to be welded, and the wire hooking mechanism comprises a first driving part and a hook mounted on the first driving part;

the spot welding mechanism is located above the electrode to be welded and comprises a second driving piece and a spot welding machine installed on the second driving piece, and the second driving piece drives the spot welding machine to weld the cable on the target electrode in a descending mode.

Preferably, the magnetic cores are arranged along a straight line, the wire hooking mechanism hooks the cable of the previous magnetic core to the position above the target electrode of the next magnetic core, and the two groups of spot welding mechanisms are used for welding the two target electrodes respectively.

Furthermore, a line pressing assembly is arranged between two adjacent magnetic cores and used for tensioning the cable hooked by the line hooking mechanism on the two target electrodes; the wire pressing assembly comprises a fixed block, a movable block and a reset piece, the fixed block is fixed on a vertical plate, the movable block moves forwards relative to the fixed block under the action of downward pressure of a cable, a wire hole for accommodating the cable is formed between the fixed block and the movable block, and the wire hole extends along the left-right direction; the reset piece applies backward pulling force to the movable block, so that the wire hole clamps the cable.

Preferably, the line pressing assembly further comprises a guide block fixed on the vertical plate along the front-back direction, a guide rail is arranged on the guide block, a guide groove matched with the guide rail is arranged on the side wall of the moving block, and the moving block moves back and forth along the guide rail.

Preferably, the movable block is located between the left guide block and the right guide block, a connecting block is further installed between the guide blocks, and the front end and the rear end of the reset piece are respectively fixed on the connecting block and the movable block.

Preferably, the reset piece is a compression spring; the connecting part of the top parts of the fixed block and the movable block is provided with a concave inclined surface, and the cable extrudes the movable block after passing through the inclined surface.

Further, the wire winding mechanism is used for simultaneously rotating and translating the magnetic core and winding the cable on the magnetic core;

the winding mechanism comprises a linear module, a rotary cylinder and a clamping jaw cylinder;

the straight line module is along left right direction horizontal installation, revolving cylinder along the fore-and-aft direction install in on the slider of straight line module, clamping jaw cylinder install in on revolving cylinder's the carousel, clamping jaw cylinder is used for pressing from both sides tight magnetic core, revolving cylinder drive the magnetic core is rotatory, straight line module drive the magnetic core translation.

Further, the device also comprises a lifting mechanism which is positioned below the spot welding mechanism and used for supporting the magnetic cores and lowering the next magnetic core while the winding mechanism winds the previous magnetic core; the lifting mechanism comprises a lifting cylinder and a workbench arranged above the lifting cylinder.

The invention also aims to provide a method for processing the chip inductor, which solves the problem that the chip inductor is difficult to realize automatic welding in a small space.

The processing method is realized by the automatic welding device of the chip inductor, and comprises the following steps:

the spot welding mechanism welds the end of the cable on the target electrode on the left side of the magnetic core; rotating the magnetic core, and winding the cable on the magnetic core until the cable reaches the right side of the magnetic core;

the first driving piece of the wire hooking mechanism extends out of the hook, and after the cable is hooked, the first driving piece resets the hook rightwards, so that the cable is tightly attached to the target electrode on the right side of the magnetic core; the wire hooking mechanism continues to pull the cable rightwards, so that the cable is tightly attached to the target electrode on the left side of the next magnetic core;

the spot welding mechanism moves downwards to weld the cable on the target electrode;

cutting off the cable between the two target electrodes to complete the cable welding of the first inductor; the above steps are repeated.

Preferably, the method further comprises the following steps:

when the magnetic core is rotated, the winding mechanism simultaneously rotates and translates the magnetic core to wind the cable on the magnetic core, and the lifting cylinder lowers the workbench;

after the winding is finished, the lifting cylinder lifts the workbench and supports two magnetic cores to be welded simultaneously.

The invention has the beneficial effects that:

according to the invention, the spot welding mechanism is matched with the wire hooking mechanism, so that the coil of the wound chip inductor is automatically welded on the target electrode, and manual arrangement and positioning of the coil are not needed during welding. The first driving part of the wire hooking mechanism firstly extends out of the hook and then slightly retracts to enable the hook to hook the cable, and then the first driving part resets the hook rightwards to enable the cable to be tightly attached to the target electrode on the right side of the magnetic core; the wire hooking mechanism continues to pull the cable rightwards, so that the cable is tightly attached to the target electrode on the left side of the next magnetic core, and therefore the two electrodes are welded simultaneously, and the front-back continuity and the high efficiency of a production line are guaranteed.

According to the invention, the wire pressing assembly is arranged between the two target electrodes, and the cable hooked by the wire hooking mechanism is tensioned on the two target electrodes, so that the cable at the welding point is prevented from loosening to cause infirm welding. The line ball subassembly includes the stator, moves the piece and resets, moves the piece and moves forward under the holding down force effect of cable, gets into the downthehole of stator between the piece and the moving block, makes the tight cable of line hole clamp tightly by the piece that resets is taut backward, prevents that the cable does not have the tensioning.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a winding mechanism of the present invention prior to operation;

FIG. 2 is a schematic structural diagram of the start of hooking after the completion of winding according to the present invention;

FIG. 3 is a schematic view of the structure of the present invention beginning to weld after the hook is completed;

FIG. 4 is a schematic top view of the punch assembly of the present invention;

FIG. 5 is a schematic cross-sectional view taken at A-A in FIG. 4;

FIG. 6 is a schematic diagram of the operation of the wire crimping assembly of the present invention;

FIG. 7 is a schematic view of the cable crimping assembly of the present invention after crimping the cable.

Labeled as:

1. a chip inductor; 11. a magnetic core; 111. a mandrel; 12. a coil; 13. an electrode;

20. a winding mechanism; 21. a linear module; 22. a rotating cylinder; 23. a clamping jaw cylinder;

30. a work table; 31. a trough body; 32. a lifting cylinder;

40. a thread hooking mechanism; 41. a first driving member; 42. hooking; 43. a vertical plate;

50. a spot welding mechanism; 51. a second driving member; 52. a spot welder;

60. a wire pressing assembly; 61. fixing blocks; 62. a guide block; 63. a moving block; 631. a bevel; 632. half-hole; 64. a reset member; 65. a guide rail; 66. connecting blocks; 67. a wire hole;

70. a pay-off reel; 71. a cable.

Detailed Description

Example 1

The embodiment is suitable for welding the following chip inductors: the chip inductor 1 is a wound inductor and includes an i-shaped magnetic core 11, electrodes 13 located on the tops of two sides of the magnetic core 11, and a coil 12 wound on the magnetic core 11, wherein two ends of the coil 12 are soldered to the two electrodes 13.

Referring to fig. 1 to 3, the automatic welding device for chip inductor 1 of the present embodiment includes a winding mechanism 20, a hooking mechanism 40 and a spot welding mechanism 50.

The coil raw material is a cable wound on a pay-off reel 70, and the pay-off reel 70 is driven by a servo electrode to rotate and pay off. The winding mechanism 20 is configured to simultaneously rotate and translate the core 11, and wind the wire 71 around the core shaft 111 in the middle of the core 11.

Specifically, the wire winding mechanism 20 includes a linear block 21, a rotary cylinder 22, and a jaw cylinder 23.

The straight line module 21 is horizontally installed on the frame along the left-right direction, the rotary cylinder 22 is installed on the slide block of the straight line module 21 along the front-back direction, and the clamping jaw cylinder 23 is installed on the turntable of the rotary cylinder 22. During wire winding, clamping jaw cylinder 23 clamps the tip of magnetic core 11, and revolving cylinder 22 drives clamping jaw cylinder 23 and drives magnetic core 11 rotatory, with the cable winding on dabber 111, and straight line module 21 drives magnetic core 11 translation simultaneously, makes the cable evenly spread dabber 111 along the length direction of dabber 111.

As shown in fig. 3, the plurality of magnetic cores 11 are linearly arranged in the horizontal direction, the magnetic cores 11 are supported by the table 30, and the upper surface of the table 30 is provided with a groove 31 for positioning the magnetic cores 11, so that the magnetic cores 11 can be fixed during spot welding, and the welding accuracy can be improved. The working table 30 is installed on the lifting cylinder 32, and the lifting cylinder 32 lowers the working table 30 to prevent the working table from interfering with the winding process in the process that the winding mechanism 20 winds the previous magnetic core 11. After the winding is completed, the elevating cylinder 32 raises the table 30 to support the previous and next magnetic cores.

The wire hooking mechanism 40 is located above the chip inductor 1, hooks the cable 71 from the right side of the mandrel 111 and pulls the cable to the right, so that the cable 71 is tightly attached to the target electrode on the right side of the mandrel 111, and is hooked to the target electrode on the left side of the next magnetic core 11.

As shown in fig. 2 and 3, the thread hooking mechanism 40 includes a first driver 41 and a hook 42 mounted on a piston rod of the first driver 41; the first driving member 41 is horizontally installed on a vertical plate 43, and the first driving member 41 can drive the hook 42 to move rightwards, so as to hook the cable 71. The first driver 41 is a pen cylinder.

The two sets of spot welding mechanisms 50 are mounted on the vertical plate 43 in parallel, and the two sets of spot welding mechanisms 50 respectively weld the target electrodes of the two inductors.

The spot welding mechanism 50 is located above the electrode 13 to be welded, the spot welding mechanism 50 comprises a second driving member 51 and a spot welding machine 52 mounted on the second driving member 51, and the second driving member 51 drives the spot welding machine 52 to move downwards to weld the cable 71 on the target electrode. The second driving member 51 is a cylinder or an electric module.

The working process of the automatic welding device for the chip inductor 1 is as follows:

arranging a plurality of magnetic cores 11 in a straight line, and placing the magnetic cores in a groove body 31 of a workbench 30;

the spot welding mechanism 50 welds the end of the first wire 71 to the target electrode on the left side of the magnetic core 11;

the clamping jaw air cylinder 23 of the winding mechanism 20 clamps the magnetic core 11, the lifting air cylinder 32 lowers the workbench 30, the rotary air cylinder 22 and the linear module 21 are matched to act, the magnetic core 11 is moved leftwards in the process of rotating the magnetic core 11, and the cable 71 is uniformly wound on the magnetic core 11 until the cable reaches the right side of the magnetic core 11;

the first driving member 41 of the wire hooking mechanism 40 extends out of the hook 42, and after the wire 71 is hooked, the first driving member 41 moves the hook 42 to the right, so that the wire 71 is tightly attached to the target electrode on the right side of the magnetic core 11;

the wire hooking mechanism 40 continues to pull the cable 71 to the right, so that the cable 71 is tightly attached to the upper part of the target electrode on the left side of the next magnetic core 11;

the lifting cylinder 32 lifts the worktable 30 to support the two magnetic cores 11; the two spot welding mechanisms 50 move downward to weld the coil 12 to the two target electrodes;

cutting off redundant cables 71 between the two target electrodes to complete the coil welding of the first inductor;

and repeating the steps to weld the next inductor.

Example 2

The difference between this embodiment and embodiment 1 is that, as shown in fig. 3 to 7, a wire pressing assembly 60 is disposed between two adjacent magnetic cores 11, and is used for tensioning the cable 71 hooked by the wire hooking mechanism 40 on two target electrodes, so that the cable is better attached to the electrodes 13, and the welding precision and the welding reliability are improved.

Specifically, referring to fig. 4, the wire pressing assembly 60 includes a fixed block 61, a guide block 62, a movable block 63 and a reset member 64. The fixed block 61 is welded or screwed on the vertical plate 43, the movable block 63 can move forwards, opposite half holes 632 are arranged on the movable block 63 and the fixed block 61, when the two half holes 632 are combined, a wire hole 67 for accommodating the cable 71 is formed, and the wire hole 67 extends along the left and right direction. After the cable 71 is hooked by the cable hooking mechanism 40, downward pressure is applied to the fixed block 61 and the movable block 63 when the cable passes through the fixed block 61 and the movable block 63, the movable block 63 moves forward under the action of the pressure, a gap is formed between the movable block 63 and the fixed block 61, the cable 71 passes through the gap and slides into the cable hole 67, and the resetting piece 64 applies backward pulling force to the movable block 63 to enable the cable hole 67 to clamp the cable 71.

Two guide blocks 62 are also fixed to the vertical plate 43, a moving block 63 is located between the two guide blocks 62, and the guide blocks 62 guide the movement of the moving block 63. Specifically, a guide rail 65 is installed on the inner side wall of the guide block 62, a guide groove matched with the guide rail 65 is arranged on the side wall of the movable block 63, and the movable block 63 moves back and forth along the guide rail 65.

A connecting block 66 is further installed between the two guide blocks 62, the reset piece 64 is a compression spring, the front end and the rear end of the reset piece 64 are respectively fixed on the connecting block 66 and the movable block 63, the reset piece 64 backwards extrudes the movable block 63, and the movable block 63 and the fixed block 61 are matched to clamp the cable 71.

The connecting part of the fixed block 61 and the top of the movable block 63 is provided with a concave inclined surface 631, and the cable 71 passes through the inclined surface 631 and then presses the movable block 63. The ramp 631 pre-positions the hooked cable 71 so that the cable 71 is accurately squeezed out of the block 63 and slid into the wire hole 67.

The other structure of this embodiment is the same as embodiment 1.

The line pressing process of the embodiment is as follows:

as shown in fig. 5 to 7, the wire hooking mechanism 40 hooks the cable 71 and continues to pull rightward, the cable 71 passes through the electrode 13 on the right side of the previous magnetic core 11 and then presses on the inclined surfaces 631 of the fixed block 61 and the movable block 63, along with the continued rightward movement of the wire hooking mechanism 40, the cable 71 presses the movable block 63 in the lower right direction to squeeze the movable block 63 open, the cable 71 does not press the movable block 63 any more after sliding into the half hole 632, the movable block 63 retracts backward under the thrust of the reset piece 64 and presses against the fixed block 61, and the cable 71 is clamped in the wire hole 67;

the spot welding structure acts to weld the cable 71 to the two target electrodes; excess cable 71 between the target electrodes is cut off.

The other working procedures were the same as in example 1.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic welding device for a chip inductor is a winding inductor and comprises an I-shaped magnetic core, electrodes positioned at the tops of two sides of the magnetic core and a coil wound on the magnetic core, wherein two ends of the coil are welded on the two electrodes; the automatic welding device is characterized by comprising a line hooking mechanism and a spot welding mechanism;

2. The automatic welding device for chip inductor according to claim 1, wherein a plurality of said magnetic cores are arranged along a straight line, said wire hooking mechanism moves the wire of the previous magnetic core to above the target electrode of the next magnetic core, and two sets of said spot welding mechanisms weld the target electrodes of two adjacent magnetic cores respectively.

3. The automatic welding device for the chip inductor according to claim 2, wherein a line pressing component is arranged between two adjacent magnetic cores and used for tensioning the cable hooked by the line hooking mechanism on two target electrodes; the wire pressing assembly comprises a fixed block, a movable block and a reset piece, the fixed block is fixed on a vertical plate, the movable block moves forwards relative to the fixed block under the action of downward pressure of a cable, a wire hole for accommodating the cable is formed between the fixed block and the movable block, and the wire hole extends along the left-right direction; the reset piece applies backward pulling force to the movable block, so that the wire hole clamps the cable.

4. The automatic welding device for chip inductors according to claim 3, wherein the wire pressing assembly further comprises a guide block fixed on the vertical plate along the front-back direction, the guide block is provided with a guide rail, the side wall of the moving block is provided with a guide groove matched with the guide rail, and the moving block moves back and forth along the guide rail.

5. The automatic welding device for the chip inductors according to claim 4, wherein the moving block is located between the left and right guide blocks, a connecting block is further installed between the guide blocks, and the front end and the rear end of the reset piece are respectively fixed on the connecting block and the moving block.

6. The automatic welding device for chip inductors according to claim 3, wherein the reset piece is a compression spring; the connecting part of the top parts of the fixed block and the movable block is provided with a concave inclined surface, and the cable extrudes the movable block after passing through the inclined surface.

7. The automatic welding device for chip inductor according to claim 1, further comprising a winding mechanism for simultaneously rotating and translating the magnetic core to wind the cable on the magnetic core;

8. The automatic welding device for chip inductor according to claim 7, further comprising a lifting mechanism located below the spot welding mechanism for supporting the magnetic core and lowering the next magnetic core while the winding mechanism winds the previous magnetic core; the lifting mechanism comprises a lifting cylinder and a workbench arranged above the lifting cylinder.

9. A processing method of a chip inductor is realized by the automatic welding device of the chip inductor in any one of claims 1-8, and is characterized by comprising the following steps:

the spot welding mechanism welds the end of the cable on the target electrode on the left side of the magnetic core; rotating the magnetic core, and winding the cable on the magnetic core to form a coil until the cable reaches the right side of the magnetic core;

the first driving piece of the wire hooking mechanism extends out of the hook, and after the coil is hooked, the first driving piece resets the hook rightwards, so that the cable is tightly attached to the target electrode on the right side of the magnetic core; the wire hooking mechanism continues to pull the cable rightwards, so that the cable is tightly attached to the target electrode on the left side of the next magnetic core;

cutting off the cable between the two target electrodes to complete the coil welding of the first inductor; the above steps are repeated.

10. The process of claim 9, further comprising the steps of:

after the winding is completed, the lifting cylinder lifts the workbench and simultaneously supports two magnetic cores to be welded.