Laser cutting equipment and laser cutting process for charging coil

Abstract

The present invention relates to the field of coil production technology, and specifically to a laser cutting device and laser cutting process for a charging coil, comprising a frame; the frame is provided with a carrier movably disposed at the bottom of the copper foil; the moving speed of the carrier is the same as the transmission speed of the copper foil; a water storage part is disposed in the carrier; the frame is provided with a first laser head, a water injection device, a first cooling device, a second laser head, a second cooling device and a third laser head in sequence along the transmission direction of the copper foil. The present invention provides a through hole on the waste area on the copper foil, fills liquid between the copper foil and the top surface of the body, and fixes the copper foil on the top surface of the body by freezing the liquid; on the one hand, during the laser cutting process, the liquid can absorb the heat of the cutting part and reduce the thermal deformation of the charging coil; on the other hand, during the separation of the charging coil and the copper foil after cutting, since the waste area is fixed by a solid part, the charging coil and the waste area can be more easily separated.

Description

Technical Field

[0001] The present invention relates to the technical field of coil production, and in particular to laser cutting equipment and a laser cutting process for a charging coil. Background Art

[0002] Wireless charging technology has been widely used in the field of consumer electronics due to its convenience and practicality. As one of the core components of the wireless charging system, the manufacturing quality of the wireless charging coil directly affects the charging efficiency and system stability. Most of the existing wireless charging coils are cut out of the copper foil by die cutting or laser cutting.

[0003] The die-cutting process uses a die to cut the copper foil to form the required coil shape. However, due to the large shear stress on the coil during the die-cutting process, and the cross-sectional area of ​​the coil is often small, it is very easy to deform during the die-cutting process, affecting the dimensional accuracy of the coil.

[0004] Compared with the die-cutting process, the laser cutting process will be affected by thermal stress at the cutting part and cause deformation. In addition, after the coil is cut, the distance between the coil and the cut surface of the waste area is relatively close, and there is no effective means to fix the waste area in the existing laser cutting process, which causes the waste area to be lifted up during the unloading process after the cutting, causing the coil body to be stuck. In the worst case, the coil will be deformed under the pulling force, and in the worst case, the coil will be scrapped and the production line will be shut down. Summary of the invention

[0005] The purpose of the present invention is to provide a laser cutting device and a laser cutting process for a charging coil in view of the above-mentioned deficiencies in the prior art.

[0006] The purpose of the present invention is achieved through the following technical solutions: A laser cutting device for a charging coil comprises a frame; the frame is rotatably provided with a feeding roller and a feeding roller; a copper foil is provided between the feeding roller and the feeding roller;

[0007] The frame is provided with a carrier movably at the bottom of the copper foil; the moving speed of the carrier is the same as the transmission speed of the copper foil; a water storage part is provided in the carrier;

[0008] The frame is provided with a first laser head, a water injection device, a first cooling device, a second laser head, a second cooling device and a third laser head in sequence along the transmission direction of the copper foil;

[0009] The first laser head is used to form a through hole in the waste area of ​​the copper foil;

[0010] The water injection device is used to inject the liquid in the water storage member into between the through hole and the carrier;

[0011] The first cooling device is used to perform a first cooling of the liquid between the through hole and the carrier to form a solid part;

[0012] The second laser head cuts a pre-cut groove along the edge of the waste area;

[0013] The second cooling device is used to perform a second cooling on the liquid between the through hole and the carrier to form a solid part;

[0014] The third laser head cuts off the edge of the waste area except the pre-cut groove, thereby forming a charging coil in the copper foil.

[0015] The present invention is further configured such that the rack is further provided with an electrostatic adsorption plate and a heating module along the transmission direction of the copper foil;

[0016] The electrostatic adsorption plate is used to adsorb the charging coil in the copper foil;

[0017] The heating module is used to melt the solid part between the through hole and the carrier into liquid.

[0018] The present invention is further configured such that the first cooling device and the second cooling device are both arranged on the top of the copper foil; and the water injection device is arranged on the bottom of the first cooling device.

[0019] The present invention is further configured such that a water storage tank is provided at the top of the through hole in the waste area of ​​the copper foil; and the water storage tank is communicated with the through hole.

[0020] The present invention is further configured as follows: the carrier includes a main body and a driving plate that is movable and arranged at the bottom of the main body; a accommodating cavity is formed between the main body and the driving plate; the water storage component is arranged in the accommodating cavity; the water storage component is respectively abutted against the main body and the driving plate; a water-permeable hole is penetrated by the top surface of the main body; the copper foil is arranged on the top surface of the main body; and the water storage component is an elastic sponge.

[0021] The present invention is further configured that the water injection device includes an electromagnet; a permanent magnet is provided at the bottom of the driving plate;

[0022] When the carrier and the copper foil move to the position of the electromagnet, the electromagnet is located at the bottom of the permanent magnet. The electromagnet pushes the driving plate to rise and squeeze the water storage part through the permanent magnet, thereby injecting liquid between the top surface of the body and the through hole.

[0023] The present invention is further configured such that the frame is provided with an annular chain and a motor for driving the annular chain to move; the annular chain is movably hinged to the body; and the frame is provided with a liquid storage tank at the bottom of the annular chain.

[0024] The present invention is further configured such that rollers are provided on both sides of the body; and the frame is provided with slide rails cooperating with the rollers.

[0025] A laser cutting process comprises the following steps:

[0026] S1. Place the copper foil on the top of the body so that the copper foil is placed on the top of the water permeable hole;

[0027] S2, the copper foil and the body are moved to the bottom of the first laser head, and the first laser head cuts in the waste area of ​​the copper foil to form a through hole penetrating the copper foil;

[0028] S3, the copper foil and the body move to the position of the electromagnet, the polarity of the electromagnet is the same as that of the permanent magnet, so that the driving plate rises to squeeze the water storage part, thereby injecting the liquid in the water storage part into between the top surface of the body and the through hole;

[0029] S4, the first cooling device performs a first cooling on the liquid between the top surface of the body and the through hole to form a solid part;

[0030] S5, the copper foil and the body move to the bottom of the second laser head, and the second laser head cuts a pre-cut groove along the edge of the waste area of ​​the copper foil;

[0031] S6, the copper foil and the body are moved to a second cooling device, and the second cooling device cools the liquid between the top surface of the body and the through hole for a second time to form a solid part;

[0032] S7, the copper foil and the body move to the bottom of the third laser head, and the third laser head cuts off the edge of the waste area except the pre-cut groove, thereby forming a charging coil in the copper foil.

[0033] The present invention is further configured to include the following steps:

[0034] S8, the copper foil and the body are moved to the position of the electrostatic adsorption plate, and the electrostatic adsorption plate adsorbs the charging coil in the copper foil;

[0035] S9, the copper foil and the body are moved to the position of the heating module, the heating module melts the solid part between the top surface of the body and the through hole into liquid, and then rolls up the copper foil.

[0036] Beneficial effects of the present invention: The present invention provides a through hole on the waste area on the copper foil, fills liquid between the copper foil and the top surface of the main body, and fixes the copper foil on the top surface of the main body by freezing the liquid; on the one hand, during the laser cutting process, the liquid can absorb the heat of the cutting part and reduce the thermal deformation of the charging coil; on the other hand, during the separation of the charging coil and the copper foil after cutting, since the waste area is fixed by a solid part, the charging coil and the waste area can be more easily separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0038] Figure 1 It is a schematic diagram of the structure of the present invention;

[0039] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;

[0040] Figure 3 yes Figure 1 A partial enlarged view of the B area;

[0041] Figure 4 yes Figure 1 A partial enlarged view of the middle C area;

[0042] Figure 5 yes Figure 1 A partial enlarged view of the D part;

[0043] Figure 6 is a structural cross-sectional view of the present invention;

[0044] Figure 7 yes Figure 6 A partial enlarged view of the E part;

[0045] Figure 8 It is a structural schematic diagram of the carrier of the present invention;

[0046] Fig. 9 is a schematic structural diagram of the carrier of the present invention from another perspective;

[0047] Fig.10 is a cross-sectional view of the carrier of the present invention;

[0048] Among them: 1. frame; 11. feeding roller; 12. unloading roller; 2. copper foil; 21. waste area; 22. through hole; 23. water storage tank; 24. pre-cut groove; 25. charging coil; 3. carrier; 31. main body; 32. drive plate; 33. accommodating cavity; 34. water permeable hole; 35. permanent magnet; 36. roller; 4. water storage part; 51. first laser head; 52. second laser head; 53. third laser head; 61. first cooling device; 62. second cooling device; 7. water injection device; 81. electrostatic adsorption plate; 82. heating module; 91. motor; 92. ring chain; 93. liquid storage tank. DETAILED DESCRIPTION

[0049] The present invention is further described in conjunction with the following examples.

[0050] Depend on Figures 1 to 10It can be seen that the laser cutting equipment of a charging coil 25 described in this embodiment includes a frame 1; the frame 1 is rotatably provided with a feeding roller 11 and a feeding roller 12; a copper foil 2 is provided between the feeding roller 11 and the feeding roller 12; the frame 1 is movably provided with a carrier 3 at the bottom of the copper foil 2; the moving speed of the carrier 3 is the same as the transmission speed of the copper foil 2; a water storage part 4 is provided in the carrier 3; the frame 1 is provided with a first laser head 51, a water injection device 7, a first cooling device 61, a second laser head 52, a second cooling device 62 and a third laser head 53 in sequence along the transmission direction of the copper foil 2; the first laser head 51 is used for A through hole 22 is formed in the waste area 21 of the copper foil 2; the water injection device 7 is used to inject the liquid in the water storage part 4 into the space between the through hole 22 and the carrier 3; the first cooling device 61 is used to cool the liquid between the through hole 22 and the carrier 3 for the first time to form a solid part; the second laser head 52 cuts a pre-cut groove 24 along the edge of the waste area 21; the second cooling device 62 is used to cool the liquid between the through hole 22 and the carrier 3 for the second time to form a solid part; the third laser head 53 cuts off the edge of the waste area 21 except the pre-cut groove 24, thereby forming a charging coil 25 in the copper foil 2. In the laser cutting device for a charging coil 25 described in this embodiment, the carrier 3 includes a body 31 and a driving plate 32 that is movable and movable at the bottom of the body 31; a receiving chamber 33 is formed between the body 31 and the driving plate 32; the water storage member 4 is arranged in the receiving chamber 33; the water storage member 4 is respectively against the body 31 and the driving plate 32; a water-permeable hole 34 is provided through the top surface of the body 31; the copper foil 2 is provided on the top surface of the body 31; the water storage member 4 is an elastic sponge. In the laser cutting device for a charging coil 25 described in this embodiment, the water injection device 7 includes an electromagnet; a permanent magnet 35 is provided at the bottom of the driving plate 32; when the carrier 3 and the copper foil 2 move to the position of the electromagnet, the electromagnet is located at the bottom of the permanent magnet 35, and the electromagnet pushes the driving plate 32 upward through the permanent magnet 35 to squeeze the water storage member 4, thereby injecting liquid between the top surface of the body 31 and the through hole 22.

[0051] Specifically, when using the laser cutting equipment for the charging coil 25 described in this embodiment, the positions of the charging coil 25 and the waste area 21 are first determined on the copper foil 2. Since the shape of the charging coil 25 is a spiral, the gap between the wires of the charging coil 25 is the waste area 21 that needs to be removed.

[0052] After passing through the feeding roller 11, the copper foil 2 is placed on the top of the body 31, so that the copper foil 2 is placed on the top of the water permeable hole 34; since the moving speed of the carrier 3 is the same as the transmission speed of the copper foil 2, the copper foil 2 and the body 31 move together to the bottom of the first laser head 51, and the first laser head 51 cuts in the waste area 21 of the copper foil 2 to form a plurality of through holes 22 that penetrate the copper foil 2, and then the copper foil 2 and the body 31 move to the position of the electromagnet, so that the polarity of the electromagnet is the same as the polarity of the permanent magnet 35, so that the driving plate 32 rises to squeeze the water storage part 4, thereby injecting the liquid in the water storage part 4 into between the top surface of the body 31 and the through hole 22; Then, the first cooling device 61 performs a first cooling of the liquid between the top surface of the body 31 and the through hole 22 to form a solid part, thereby fixing the waste area 21 and the top surface of the body 31 through the solid part; then, the copper foil 2 and the body 31 are moved to the bottom of the second laser head 52, and the second laser head 52 cuts the pre-cut groove 24 along the edge of the waste area 21 of the copper foil 2. In this embodiment, the pre-cut groove 24 is first cut along the edge of the waste area 21, instead of cutting all the edges of the waste area 21 at one time. When the edges of all the waste areas 21 are cut at one time, the waste area 21 is separated from the charging coil 25. The area of ​​the waste area 21 is large, which may easily cause the charging coil 25 to deform. The pre-cut groove 24 is first cut along the edge of the waste area 21. Since the cutting area is small, the charging coil 25 can be prevented from being deformed. After the pre-cut groove 24 is cut along the edge of the waste area 21, the solid part between the top surface of the body 31 and the through hole 22 may melt into liquid during the cutting process. Therefore, the copper foil 2 and the body 31 are moved to the second cooling device 62, and the second cooling device 62 cools the liquid between the top surface of the body 31 and the through hole 22 for a second time to form a solid part. Then, the copper foil 2 and the body 31 are moved to the bottom of the third laser head 53, and the third laser head 54 is used to cool the liquid between the top surface of the body 31 and the through hole 22. The three laser heads 53 cut off the edge of the waste area 21 except the pre-cut groove 24, thereby forming a charging coil 25 in the copper foil 2. Since the edge of the waste area 21 except the pre-cut groove 24 is far away from the through hole 22, the solid parts between the top surface of the main body 31 and the through hole 22 can be prevented from melting during the cutting process, so that the waste area 21 and the top surface of the main body 31 remain fixed. In addition, during the cutting process, since there is liquid on the entire top surface of the main body 31, it can absorb the heat of the cutting part and reduce the thermal deformation of the charging coil 25. Then, the charging coil 25 can be effectively separated from the waste area 21.

[0053] In this embodiment, a through hole 22 is set on the waste area 21 on the copper foil 2, liquid is filled between the copper foil 2 and the top surface of the main body 31, and the copper foil 2 is fixed to the top surface of the main body 31 by freezing the liquid; on the one hand, during the laser cutting process, the liquid can absorb the heat of the cutting part and reduce the thermal deformation of the charging coil 25; on the other hand, during the separation of the charging coil 25 and the copper foil 2 after cutting, since the waste area 21 is fixed by a solid part, the charging coil 25 and the waste area 21 can be more easily separated.

[0054] In the laser cutting device for a charging coil 25 described in this embodiment, the frame 1 is further provided with an electrostatic adsorption plate 81 and a heating module 82 along the transmission direction of the copper foil 2;

[0055] The electrostatic adsorption plate 81 is used to adsorb the charging coil 25 in the copper foil 2;

[0056] The heating module 82 is used to melt the solid part between the through hole 22 and the carrier 3 into liquid.

[0057] Specifically, after the third laser head 53 cuts off the edge of the waste area 21 except the pre-cut groove 24, thereby forming the charging coil 25 in the copper foil 2, the copper foil 2 and the main body 31 move to the position of the electrostatic adsorption plate 81, and the electrostatic adsorption plate 81 adsorbs the charging coil 25 in the copper foil 2; then the copper foil 2 and the main body 31 move to the position of the heating module 82, and the heating module 82 melts the solid part between the top surface of the main body 31 and the through hole 22 into liquid, thereby separating the copper foil 2 from the top surface of the main body 31, and then the copper foil 2 is rolled up.

[0058] In the laser cutting device for a charging coil 25 described in this embodiment, the first cooling device 61 and the second cooling device 62 are both arranged on the top of the copper foil 2; the water injection device 7 is arranged on the bottom of the first cooling device 61. The above arrangement makes the overall structure more stable and reliable.

[0059] In the laser cutting equipment for a charging coil 25 described in this embodiment, the waste area 21 of the copper foil 2 is provided with a water storage tank 23 at the top of the through hole 22; the water storage tank 23 is connected to the through hole 22. Specifically, the radius of the water storage tank 23 is greater than the radius of the through hole 22. Through the above arrangement, after the water storage member 4 is squeezed, it enters the top surface of the main body 31 through the water-permeable hole 34, and is injected into the through hole 22 under the action of surface tension, and is injected into the position of the water storage tank 23, thereby forming an undercut at the position of the water storage tank 23, and forming a nail-like structure between the through hole 22 and the top surface of the main body 31, thereby enhancing the stability of the connection between the through hole 22 and the top surface of the main body 31.

[0060] In the laser cutting device for a charging coil 25 described in this embodiment, the frame 1 is provided with an annular chain 92 and a motor 91 for driving the annular chain 92 to move; the annular chain 92 is hinged to the body 31; the frame 1 is provided with a liquid storage tank 93 at the bottom of the annular chain 92. Specifically, the motor 91 drives the annular chain 92 to move, thereby driving the carrier 3 to move in an annular manner along the annular chain 92. When the carrier 3 moves to the bottom of the annular chain 92, the carrier 3 enters the liquid storage tank 93, and the liquid in the liquid storage tank 93 replenishes the liquid of the water storage member 4.

[0061] In the laser cutting device for a charging coil 25 described in this embodiment, rollers 36 are provided on both sides of the body 31; the frame 1 is provided with slide rails that cooperate with the rollers 36. The slide rails are not shown in the figure; the above arrangement enables the carrier 3 to move stably.

[0062] A laser cutting process described in this embodiment includes the following steps:

[0063] S1, placing the copper foil 2 on the top of the body 31, so that the copper foil 2 is placed on the top of the water permeable hole 34;

[0064] S2, the copper foil 2 and the body 31 move to the bottom of the first laser head 51, and the first laser head 51 cuts in the waste area 21 of the copper foil 2 to form a through hole 22 that penetrates the copper foil 2;

[0065] S3, the copper foil 2 and the body 31 move to the position of the electromagnet, the polarity of the electromagnet is the same as the polarity of the permanent magnet 35, so that the driving plate 32 rises to squeeze the water storage member 4, thereby injecting the liquid in the water storage member 4 into the space between the top surface of the body 31 and the through hole 22;

[0066] S4, the first cooling device 61 performs a first cooling of the liquid between the top surface of the body 31 and the through hole 22 to form a solid part;

[0067] S5, the copper foil 2 and the body 31 move to the bottom of the second laser head 52, and the second laser head 52 cuts the pre-cut groove 24 along the edge of the waste area 21 of the copper foil 2;

[0068] S6, the copper foil 2 and the body 31 are moved to the second cooling device 62, and the second cooling device 62 performs a second cooling on the liquid between the top surface of the body 31 and the through hole 22 to form a solid part;

[0069] S7 , the copper foil 2 and the body 31 move to the bottom of the third laser head 53 , and the third laser head 53 cuts off the edge of the waste area 21 except the pre-cut groove 24 , thereby forming a charging coil 25 in the copper foil 2 .

[0070] The laser cutting process described in this embodiment further includes the following steps:

[0071] S8, the copper foil 2 and the body 31 move to the position of the electrostatic adsorption plate 81, and the electrostatic adsorption plate 81 adsorbs the charging coil 25 in the copper foil 2;

[0072] S9 , the copper foil 2 and the body 31 are moved to the position of the heating module 82 , the heating module 82 melts the solid part between the top surface of the body 31 and the through hole 22 into liquid, and then rolls up the copper foil 2 .

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A laser cutting device for a charging coil, characterized in that: It comprises a frame; the frame is rotatably provided with a feeding roller and a discharging roller; a copper foil is provided between the feeding roller and the discharging roller; The frame is provided with a carrier movably at the bottom of the copper foil; the moving speed of the carrier is the same as the transmission speed of the copper foil; a water storage part is provided in the carrier; The frame is provided with a first laser head, a water injection device, a first cooling device, a second laser head, a second cooling device and a third laser head in sequence along the transmission direction of the copper foil; The first laser head is used to form a through hole in the waste area of ​​the copper foil; The water injection device is used to inject the liquid in the water storage member into between the through hole and the carrier; The first cooling device is used to perform a first cooling of the liquid between the through hole and the carrier to form a solid part; The second laser head cuts a pre-cut groove along the edge of the waste area; The second cooling device is used to perform a second cooling on the liquid between the through hole and the carrier to form a solid part; The third laser head cuts off the edge of the waste area except the pre-cut groove, thereby forming a charging coil in the copper foil.

2. The laser cutting device for a charging coil according to claim 1, characterized in that: The frame is also provided with an electrostatic adsorption plate and a heating module along the transmission direction of the copper foil; The electrostatic adsorption plate is used to adsorb the charging coil in the copper foil; The heating module is used to melt the solid part between the through hole and the carrier into liquid.

3. The laser cutting device for a charging coil according to claim 1, characterized in that: The first cooling device and the second cooling device are both arranged on the top of the copper foil; the water injection device is arranged on the bottom of the first cooling device.

4. The laser cutting device for a charging coil according to claim 1, characterized in that: The waste area of ​​the copper foil is provided with a water storage tank at the top of the through hole; the water storage tank is communicated with the through hole.

5. The laser cutting device for a charging coil according to claim 2, characterized in that: The carrier includes a main body and a driving plate that is movable and arranged at the bottom of the main body; a accommodating cavity is formed between the main body and the driving plate; the water storage component is arranged in the accommodating cavity; the water storage component is respectively against the main body and the driving plate; a water-permeable hole is penetrated by the top surface of the main body; the copper foil is arranged on the top surface of the main body; the water storage component is an elastic sponge.

6. The laser cutting device for a charging coil according to claim 5, characterized in that: The water injection device includes an electromagnet; a permanent magnet is provided at the bottom of the driving plate; When the carrier and the copper foil move to the position of the electromagnet, the electromagnet is located at the bottom of the permanent magnet. The electromagnet pushes the driving plate to rise and squeeze the water storage part through the permanent magnet, thereby injecting liquid between the top surface of the body and the through hole.

7. The laser cutting device for a charging coil according to claim 5, characterized in that: The frame is provided with an annular chain and a motor for driving the annular chain to move; the annular chain is movably hinged with the body; and the frame is provided with a liquid storage tank at the bottom of the annular chain.

8. The laser cutting device for a charging coil according to claim 5, characterized in that: Rollers are arranged on both sides of the body; and slide rails matched with the rollers are arranged on the frame.

9. A laser cutting process based on the laser cutting equipment of the charging coil according to claim 6, characterized in that: The following steps are involved: S1. Place the copper foil on the top of the body so that the copper foil is placed on the top of the water permeable hole; S2, the copper foil and the body are moved to the bottom of the first laser head, and the first laser head cuts in the waste area of ​​the copper foil to form a through hole penetrating the copper foil; S3, the copper foil and the body move to the position of the electromagnet, the polarity of the electromagnet is the same as that of the permanent magnet, so that the driving plate rises to squeeze the water storage part, thereby injecting the liquid in the water storage part into between the top surface of the body and the through hole; S4, the first cooling device performs a first cooling on the liquid between the top surface of the body and the through hole to form a solid part; S5, the copper foil and the body move to the bottom of the second laser head, and the second laser head cuts a pre-cut groove along the edge of the waste area of ​​the copper foil; S6, the copper foil and the body are moved to a second cooling device, and the second cooling device cools the liquid between the top surface of the body and the through hole for a second time to form a solid part; S7, the copper foil and the body move to the bottom of the third laser head, and the third laser head cuts off the edge of the waste area except the pre-cut groove, thereby forming a charging coil in the copper foil.

10. A laser cutting process according to claim 9, characterized in that: The following steps are also included: S8, the copper foil and the body are moved to the position of the electrostatic adsorption plate, and the electrostatic adsorption plate adsorbs the charging coil in the copper foil; S9, the copper foil and the body are moved to the position of the heating module, the heating module melts the solid part between the top surface of the body and the through hole into liquid, and then rolls up the copper foil.

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