Cutting device and cutting method

Abstract

The present invention relates to the technical field of second-generation high-temperature superconducting tape, and in particular to a cutting device and a cutting method. The cutting device includes a laser cutting element and a mechanical cutting element. The laser cutting element is used to laser cut the tape and form a first cutting slit. The first cutting slit is located in the middle of the tape along the width direction, and the length of the first cutting slit extends parallel to the length of the tape. The first cutting slit includes a first cutting end portion near the first end of the tape and a second cutting end portion near the second end of the tape, with a first connecting portion between the first cutting end portion and the first end portion. The mechanical cutting element is used to mechanically cut the tape from the second cutting end portion and form a second cutting slit. The length of the second cutting slit extends parallel to the length of the tape. The second cutting slit includes a third cutting end portion near the second end portion, with a second connecting portion between the third cutting end portion and the second end portion. The present invention effectively ensures high production efficiency and finished product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of second-generation high-temperature superconducting tapes, and in particular to a cutting device and a cutting method. Background Art

[0002] High-temperature superconductors typically refer to materials that superconduct above liquid nitrogen temperatures (77K). Second-generation high-temperature superconducting tape (YBCO, or Yttrium Barium Copper Oxide) has attracted increasing attention for its excellent performance in magnetic fields.

[0003] In the past, single second-generation high-temperature superconducting tapes were relatively short. In actual use, multiple tapes are typically connected via joints to form a ring-shaped superconducting electromagnet. Because the joints do not possess superconducting properties, their resistance is typically 10 to 80 nanoohms. This resistance generates Joule heat, consuming the magnet's current. This prevents the magnet from maintaining a stable magnetic field for a long period of time after a single magnetization, severely limiting the application of second-generation high-temperature superconducting tapes in electromagnets. To address this issue, a single second-generation high-temperature superconducting tape is cut in half along its length, retaining both ends, and then bent to form a ring-shaped magnet that does not require joints. This type of magnet can maintain stable operation for a long period of time after a single magnetization.

[0004] However, existing milling techniques are typically used to cut second-generation HTS tapes, which is only suitable for cutting shorter lengths (centimeter to meter scale). When faced with longer lengths (kilometer scale), milling can easily lead to problems such as skewed cutting and deformation, impacting production efficiency and finished product quality. Summary of the Invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the problem that the existing milling cutting method is difficult to meet the cutting requirements of kilometer-level strips, has low production efficiency and poor quality of finished products, and provides a cutting device and a cutting method. By setting laser cutting parts and mechanical cutting parts, high production efficiency and finished product quality are effectively guaranteed.

[0006] In a first aspect, the present invention provides a cutting device for cutting a strip, wherein the strip includes a first end and a second end arranged in sequence along its own length direction, the cutting device includes a laser cutting member, wherein the laser cutting member is used to laser cut the strip and form a first cutting slit, wherein the first cutting slit is located in the middle position of the strip along the width direction, and the length extension direction of the first cutting slit is parallel to the length direction of the strip, the first cutting slit includes a first cutting end close to the first end and a second cutting end close to the second end, and a first connecting portion is provided between the first cutting end and the first end; and a mechanical cutting member, wherein the mechanical cutting member is used to mechanically cut the strip from the second cutting end and form a second cutting slit, wherein the length extension direction of the second cutting slit is parallel to the length direction of the strip, the second cutting slit includes a third cutting end close to the second end, and a second connecting portion is provided between the third cutting end and the second end.

[0007] In one embodiment of the present invention, a tensioning assembly is further included, which is used to tension the strip. The tensioning assembly includes a plurality of tensioning wheels for supporting the tensioning of the strip. Each of the tensioning wheels includes a wheel body and limit members arranged on both axial sides of the wheel body. A separator corresponding to the cutting gap is provided on the radial wheel surface of the wheel body to separate the strip located on both sides of the cutting gap through the separator.

[0008] In one embodiment of the present invention, along the axial direction of the wheel body, a dimension S1 of the separator is no greater than 2 mm.

[0009] In one embodiment of the present invention, along the length direction of the strip, the distance S2 between the tensioning assembly and the mechanical cutting member is not less than 3 m.

[0010] In one embodiment of the present invention, a guide member is further included, which is arranged opposite to the laser cutting member. A guide groove is provided on the surface of the guide member close to the laser cutting member. The extension direction of the guide groove is parallel to the length direction of the strip. The strip can be moved relative to the guide member and is arranged in the guide groove.

[0011] In one embodiment of the present invention, the mechanical cutting part includes a first cutting circular knife and a second cutting circular knife, the first cutting circular knife and the second cutting circular knife are respectively arranged on both sides of the strip along the thickness direction of the strip, and the first cutting circular knife and the second cutting circular knife are staggered along the width direction of the strip; the first cutting circular knife and the second cutting circular knife are both capable of switching between an avoidance position and a cutting position; when located in the avoidance position, the first cutting circular knife and the second cutting circular knife are both separated from the strip; when located in the cutting position, the first cutting circular knife and the second cutting circular knife at least partially overlap and rotate simultaneously to cut the strip and form the second cutting gap.

[0012] In one embodiment of the present invention, the overlapping dimension D of the first cutting circular blade and the second cutting circular blade satisfies the relationship: 0.5*T≤D≤T, wherein T is the thickness of the strip.

[0013] In one embodiment of the present invention, the length L1 of the first cutting slit satisfies the relationship: 8 cm ≤ L1 ≤ 12 cm.

[0014] In one embodiment of the present invention, it also includes a first reel, which is arranged between the laser cutting part and the mechanical cutting part, and is used to reel up the strip cut by the laser cutting part and unreel it to the mechanical cutting part, wherein the first end of the reeled strip is located radially outside the first reel; and a second reel, which is arranged on a side of the mechanical cutting part away from the laser cutting part, and is used to reel up the strip cut by the mechanical cutting part.

[0015] In a second aspect, the present invention also provides a cutting method for cutting a strip, wherein the strip includes a first end and a second end arranged in sequence along its own length direction, and the cutting method includes the following steps: S1, laser cutting the strip and forming a first cutting slit, the first cutting slit is located in the middle position of the strip along the width direction, and the length extension direction of the first cutting slit is parallel to the length direction of the strip, the first cutting slit includes a first cutting end close to the first end and a second cutting end close to the second end, and a first connecting portion is provided between the first cutting end and the first end; S2, mechanically cutting the strip from the second cutting end and forming a second cutting slit, the length extension direction of the second cutting slit is parallel to the length direction of the strip, the second cutting slit includes a third cutting end close to the second end, and a second connecting portion is provided between the third cutting end and the second end.

[0016] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0017] The cutting device described in the present invention, by providing a laser cutting element and a mechanical cutting element that cooperate with each other, effectively avoids the problems associated with traditional milling methods when cutting strips. During use, the first cutting slit created by the laser cutting element does not present quality issues and can also provide a buffer for subsequent mechanical cutting, effectively ensuring the high quality of the finished product. Furthermore, the first cutting slit can provide guidance for subsequent mechanical cutting, effectively ensuring its cutting accuracy, meeting the cutting requirements for kilometer-level strips, preventing undesirable conditions such as skewed cutting, reducing the time required for positioning during purely mechanical cutting, and ensuring high production efficiency and finished product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 A schematic structural diagram of a cutting device in a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the strip before cutting in a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the strip after laser cutting in a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the strip after mechanical cutting in a preferred embodiment of the present invention;

[0023] Figure 5 Schematic diagram of the dimensional relationship of the strip in the preferred embodiment of the present invention;

[0024] Figure 6 This is a schematic cross-sectional view of the tensioning wheel in a preferred embodiment of the present invention;

[0025] Figure 7 This is a schematic cross-sectional view of a guide member in a preferred embodiment of the present invention;

[0026] Figure 8 This is one of the structural diagrams of the mechanical cutting member in the preferred embodiment of the present invention;

[0027] Figure 9 This is the second structural diagram of the mechanical cutting part in the preferred embodiment of the present invention.

[0028] Explanation of the reference numerals in the specification: 10. Strip; 11. First end; 12. Second end; 13. First cutting slit; 131. First cutting end; 132. Second cutting end; 14. First connecting portion; 15. Second cutting slit; 151. Third cutting end; 16. Second connecting portion; 20. Laser cutting part; 21. Guide member; 211. Guide groove; 30. Mechanical cutting part; 31. First cutting circular knife; 32. Second cutting circular knife; 41. First reel; 42. Second reel; 50. Tensioning assembly; 51. Tensioning wheel; 511. Wheel body; 512. Limiting member; 513. Partitioning member. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0030] The present invention discloses a cutting device for cutting a strip 10. Those skilled in the art can set the strip 10 according to actual needs; preferably, the material of the strip 10 is set to yttrium barium copper oxide, and a superconducting electromagnet is prepared after cutting the gap. Figure 2 As shown, the strip 10 includes a first end 11 and a second end 12 sequentially arranged along its length. Preferably, the strip 10 is a rectangular parallelepiped structure with a length of 2000 mm and a width of 4 or 12 mm.

[0031] Reference Figure 1 As shown, the cutting device includes a laser cutting component 20 and a mechanical cutting component 30 .

[0032] The laser cutting member 20 is used to laser cut the strip 10 and form a first cutting slit 13 on the strip 10. Those skilled in the art can configure the laser cutting member 20 according to actual needs, as long as laser cutting can be achieved.

[0033] Reference Figure 3 As shown, the first cutting slit 13 is located in the middle of the strip 10 along the width direction, and the length extension direction of the first cutting slit 13 is parallel to the length direction of the strip 10 to ensure the high quality of the finished product. The first cutting slit 13 includes a first cutting end 131 and a second cutting end 132. The first cutting end 131 is located on the side close to the first end 11, and the second cutting end 132 is located on the side close to the second end 12. A first connecting portion 14 is provided between the first cutting end 131 and the first end 11 to ensure that the first section of the strip 10 is not separated, so as to facilitate the subsequent preparation of the annular superconducting electromagnet. Those skilled in the art can set the specific value of the dimension L0 of the first connecting portion 14 according to actual needs; preferably, L0 is set to 10 cm.

[0034] By setting up a laser cutting part 20 to laser cut the strip 10, on the one hand, the characteristics of laser cutting can be utilized to avoid damage and deformation of the first cutting end 131 during cutting, and it also provides avoidance for subsequent mechanical cutting, effectively ensuring the high quality of the finished product; on the other hand, it can provide guidance for subsequent mechanical cutting through the first cutting gap 13, effectively ensuring its cutting accuracy, meeting the cutting requirements for kilometer-level strips 10, preventing the occurrence of adverse conditions such as crooked cutting, reducing the time required for positioning during pure mechanical cutting, and ensuring high production efficiency and finished product quality.

[0035] Reference Figure 4 As shown, the mechanical cutting element 30 is used to mechanically cut the strip 10 from the second cutting end 132 and form a second cutting slit 15 in the strip 10. Those skilled in the art will be able to configure the specific mechanical cutting method based on actual needs, and this will not be described in detail here. The length of the second cutting slit 15 extends parallel to the length of the strip 10; preferably, the width of the second cutting slit 15 is equal to the width of the first cutting slit 13. The second cutting slit 15 includes a third cutting end 151 adjacent to the second end 12. A second connecting portion 16 is defined between the third cutting end 151 and the second end 12 to ensure that the final section of the strip 10 is not separated, facilitating the subsequent preparation of a ring-shaped superconducting electromagnet. Those skilled in the art will be able to configure the specific dimensions of the second connecting portion 16 based on actual needs; preferably, the dimensions of the second connecting portion 16 are also set to L0. By configuring the mechanical cutting element 30 in conjunction with the laser cutting element 20, quality issues at the beginning of the cutting process can be avoided while effectively meeting the cutting requirements of kilometer-level strips 10, achieving both high production efficiency and finished product quality.

[0036] In actual use, the laser cutting unit 20 first laser cuts the strip 10, forming a first cutting slit 13 in the strip 10. The mechanical cutting unit 30 then mechanically cuts the strip 10 from the second cutting end 132 of the first cutting slit 13, forming a second cutting slit 15 in the strip 10. After cutting, the strip can be bent and formed accordingly to obtain a ring-shaped magnet that does not require joints.

[0037] The cutting device described in the present invention, by providing a laser cutting element 20 and a mechanical cutting element 30, which cooperate with each other, effectively avoids the problems that exist when cutting the strip 10 using traditional milling methods. During use, the first cutting slit 13 cut by the laser cutting element 20 will not cause quality problems, and can also provide a buffer for subsequent mechanical cutting, effectively ensuring the high quality of the finished product. In addition, the first cutting slit 13 can provide guidance for subsequent mechanical cutting, effectively ensuring its cutting accuracy, meeting the cutting requirements for kilometer-level strips 10, preventing the occurrence of undesirable conditions such as skewed cutting, reducing the time required for positioning during purely mechanical cutting, and ensuring high production efficiency and finished product quality.

[0038] Reference Figure 1 As shown, the cutting device described in the present invention, in some embodiments, further includes a first reel 41 and a second reel 42. The first reel 41 is arranged between the laser cutting component 20 and the mechanical cutting component 30, and the first reel 41 is used to reel up the strip 10 cut by the laser cutting component 20 and unreel it to the mechanical cutting component 30. The first end 11 of the reeled strip 10 is located radially outside the first reel 41 to facilitate the unreeling and mechanical cutting of the strip 10. The second reel 42 is arranged on the side of the mechanical cutting component 30 away from the laser cutting component 20, and the second reel 42 is used to reel up the strip 10 cut by the mechanical cutting component 30. Preferably, when fixing the strip 10 to the reel, the two are bonded by tape to achieve fixed reeling.

[0039] Reference Figure 1 and Figure 6 As shown, the cutting device of the present invention, in some embodiments, further includes a tensioning assembly 50 for tensioning the strip 10. The tensioning assembly 50 includes a plurality of tensioning wheels 51 for supporting the tensioned strip 10. Those skilled in the art will be able to determine the specific number of tensioning wheels 51 based on actual needs; preferably, each set of tensioning assemblies 50 includes three tensioning wheels 51 arranged in a triangle.

[0040] Each tensioning wheel 51 includes a wheel body 511 and stoppers 512 located on either axial side of the wheel body 511. The stoppers 512 limit the position of the strip 10, preventing it from detaching or shifting, ensuring smooth cutting of the slits in the strip 10 and guaranteeing high quality of the finished product. A separator 513 corresponding to the cutting slit is provided on the radial surface of the wheel body 511. The separator 513 separates the strip 10 on either side of the cutting slit. The cutting slits here comprise a first cutting slit 13 and a second cutting slit 15. During use, the strip 10 is tightened by the force of the tensioning wheel 51, allowing for efficient and stable cutting. The separator 513 can also be positioned within the corresponding cutting slit to separate the strip 10 on either side of the cutting slit. By setting up this structure, the strips 10 on both sides of the cutting gap can be ensured to be independent of each other, preventing the two from scratching or entangled with each other during or after the winding process and causing damage, thereby ensuring the yield of the finished product, saving the time required for unwinding, and improving production efficiency.

[0041] Preferably, when a reel is provided, the tensioning assembly 50 is provided between the mechanical cutting member 30 and the second reel 42. Preferably, a tensioning member, such as a conventional tensioning wheel, is also provided between the first reel 41 and the mechanical cutting member 30 to achieve the best effect.

[0042] Further, refer to Figure 6As shown, in some embodiments of the cutting device of the present invention, the dimension S1 of the separator 513 along the axial direction of the wheel body 511 is no greater than 2 mm. For example, second-generation high-temperature superconducting tapes are typically 4 mm or 12 mm wide. When the dimension S1 of the separator 513 is greater than 2 mm, the tape 10 is more likely to be damaged, reducing the yield rate of the finished product. While maintaining a thickness of no greater than 2 mm, those skilled in the art can adjust the thickness of the separator 513 based on actual needs to meet the requirements for separator 513 strength and tape 10 quality.

[0043] Further, refer to Figure 1 As shown, in some embodiments of the cutting device of the present invention, the distance S2 between the tensioning assembly 50 and the mechanical cutting element 30 along the length of the strip 10 is no less than 3 meters. By limiting the distance S2 between the tensioning assembly 50 and the mechanical cutting element 30, the distance can be coordinated with the separator 513. At this distance, the effect of the side tension on the strip 10 is negligible, ensuring a high yield rate for the finished product. While maintaining a distance of no less than 3 meters, those skilled in the art can adjust the distance based on actual needs to meet requirements for strip 10 quality and space utilization.

[0044] Reference Figure 1 and Figure 7 As shown, the cutting device of the present invention, in some embodiments, further includes a guide member 21, which is arranged opposite to the laser cutting member 20. A guide groove 211 is formed on the surface of the guide member 21 on the side close to the laser cutting member 20. The extension direction of the guide groove 211 is parallel to the length direction of the strip 10, and the strip 10 is arranged in the guide groove 211 so that it can move relative to the guide member 21. By providing the guide member 21, a guide and limit is provided for the strip 10 during laser cutting, so that the position of the strip 10 is fixed, and the cutting gap is ensured to be located in the middle position of the strip 10 along the width direction, thereby ensuring the high quality of the finished product.

[0045] Reference Figure 1 、 Figure 8 and Figure 9 As shown, in some embodiments of the cutting device of the present invention, the mechanical cutting member 30 includes a first circular cutting blade 31 and a second circular cutting blade 32. The first circular cutting blade 31 and the second circular cutting blade 32 are respectively arranged on both sides of the strip 10 along the thickness direction of the strip 10. The first circular cutting blade 31 and the second circular cutting blade 32 are staggered along the width direction of the strip 10 to achieve mechanical cutting of the strip 10.

[0046] Both the first and second circular cutting blades 31, 32 are capable of switching between a retracting position and a cutting position. When in the retracting position, the first and second circular cutting blades 31, 32 are separated from the strip 10 to allow the strip 10 to pass through without separating the first and last sections. When in the cutting position, the first and second circular cutting blades 31, 32 at least partially overlap and rotate simultaneously to cut the strip 10 and form the second cutting slit 15. The switching of the two circular cutting blades and the rotary cutting process are well known in the art and will not be further described.

[0047] By setting up the mechanical cutting part 30 of this structure, the mechanical cutting of the strip 10 can be achieved by a circular knife. It can not only meet the cutting length requirements of the kilometer-level strip 10, but also has low slitting losses. Among them, the slitting loss can be calculated by the ratio between the width consumed by slitting and the original width. Taking the second-generation high-temperature superconducting tape with a conventional width of 4mm on the market as an example, the slitting loss width of conventional milling cutting is 0.5mm, then the slitting loss is at least: 0.5 / 4=12.5%. The gap of circular knife cutting is very small, generally below 50um, which is much lower than the traditional milling method. According to the above calculation method, its slitting loss is only 1.25%. Therefore, by combining circular knife cutting with laser cutting, the loss of superconducting tape 10 during the cutting process can be effectively reduced.

[0048] Further, refer to Figure 8 and Figure 9 As shown, in some embodiments of the cutting device described in the present invention, the overlapping dimension D of the first cutting circular blade 31 and the second cutting circular blade 32 satisfies the relationship, 0.5*T≤D≤T, wherein T is the thickness of the strip 10. By limiting the overlapping dimension of the two circular blades, on the one hand, the mutual wear between the blades can be reduced, the service life of the blades can be extended, and the possibility of blade damage during the process of cutting kilometer-level strips 10 can be reduced, thereby ensuring high production efficiency and finished product quality; on the other hand, the edges of the metal strip 10 after slicing can be made more neat and burr-free, saving the time required for subsequent processing, further ensuring high production efficiency and finished product quality. Those skilled in the art can set the specific overlapping dimension D according to actual needs, such as 0.5*T, 0.6*T, 0.7*T, 0.8*T, 0.9*T, 1*T, etc.

[0049] Reference Figure 5As shown, in some embodiments of the cutting device of the present invention, the length L1 of the first cutting slit 13 satisfies the relationship: 8cm≤L1≤12cm. Taking circular knife cutting as an example, when the length L1 of the first cutting slit 13 is too short, less than 8cm, the difficulty of circular knife debugging increases, which is not conducive to operation and affects production efficiency. When the length L1 of the first cutting slit 13 is too long, greater than 12cm, it is easy to cause the strip 10 to be entangled, causing damage to the strip 10. Therefore, by limiting the length L1 of the first cutting slit 13, high efficiency and finished product quality in the production process of the strip 10 can be effectively guaranteed. Those skilled in the art can set a specific L1 according to actual needs, such as 8cm, 8.5cm, 9cm, 9.5cm, 10cm, 10.5cm, 11cm, 11.5cm, 12cm, etc.; preferably, it is set to 10cm.

[0050] The present invention discloses a cutting method for cutting a strip 10. The cutting method comprises the following steps:

[0051] S1. Laser cutting the strip 10 to form a first cutting slit 13. The first cutting slit 13 is located in the middle of the strip 10 along its width, and its length extends parallel to the length of the strip 10. The first cutting slit 13 includes a first cutting end 131 near the first end 11 and a second cutting end 132 near the second end 12. A first connecting portion 14 is defined between the first cutting end 131 and the first end 11.

[0052] S2. Mechanically cut the strip 10 from the second cutting end 132 to form a second cutting slit 15. The second cutting slit 15 extends in a direction parallel to the length of the strip 10. The second cutting slit 15 includes a third cutting end 151 adjacent to the second end 12. A second connecting portion 16 is defined between the third cutting end 151 and the second end 12.

[0053] Working principle:

[0054] First, the strip 10 is positioned within the guide groove 211 of the guide member 21. The strip 10 is then pulled manually or by a robotic arm, while the laser cutting member 20 forms a first cutting slit 13 in the strip 10. Subsequently, the strip 10 is wound onto the first reel 41, with the first end 11 of the strip 10 positioned radially outward of the first reel 41. Next, the strip 10 is unwound and the overlap dimensions of the circular cutters are adjusted. After adjustment, the first and second circular cutters 31, 32 cut the strip 10 from the second cut end 132, forming a second cutting slit 15.

[0055] Specifically, when cutting the second cutting gap 15, first try cutting a distance, for example, 5m. After confirming that there is no problem with the cutting, fix the end of the strip 10 to the second reel 42, and then perform the corresponding cutting. The portion of the strip 10 between the circular knife and the second reel 42 is tensioned by the tensioning assembly 50. When the strip 10 passes through the tensioning assembly 50, the limiter 512 and the separator 513 on the tensioning wheel 51 can fix and separate the strips 10 on both sides of the cutting gap to prevent them from scratching or entangled with each other and causing damage. After the cutting is completed, the remaining strip 10 is wound together on the second reel 42 for subsequent bending and forming to obtain an annular magnet that does not require a joint.

[0056] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A cutting device for cutting a strip, wherein the strip comprises a first end and a second end arranged in sequence along its length direction, characterized in that: The cutting device includes: a laser cutting member, the laser cutting member being configured to laser cut the strip and form a first cutting slit, the first cutting slit being located in the middle of the strip along the width direction, the first cutting slit extending in a length direction parallel to the length direction of the strip, the first cutting slit comprising a first cutting end portion proximate to the first end portion and a second cutting end portion proximate to the second end portion, a first connecting portion being defined between the first cutting end portion and the first end portion; and A mechanical cutting part, which is used to mechanically cut the strip from the second cutting end and form a second cutting slit, the length extension direction of the second cutting slit is parallel to the length direction of the strip, the second cutting slit includes a third cutting end close to the second end, and a second connecting portion is provided between the third cutting end and the second end.

2. The cutting device according to claim 1, characterized in that: It also includes a tensioning assembly, which is used to tension the strip. The tensioning assembly includes a plurality of tensioning wheels for supporting the tensioning of the strip. Each of the tensioning wheels includes a wheel body and limit members arranged on both axial sides of the wheel body. A separator corresponding to the cutting gap is provided on the radial wheel surface of the wheel body to separate the strip located on both sides of the cutting gap through the separator.

3. The cutting device according to claim 2, characterized in that: Along the axial direction of the wheel body, a dimension S1 of the separator is no greater than 2 mm.

4. The cutting device according to claim 3, characterized in that: Along the length direction of the strip, the distance S2 between the tensioning assembly and the mechanical cutting member is not less than 3m.

5. The cutting device according to any one of claims 1 to 4, characterized in that: It also includes a guide member, which is arranged opposite to the laser cutting member. A guide groove is provided on the surface of the guide member close to the laser cutting member. The extension direction of the guide groove is parallel to the length direction of the strip. The strip can be moved relative to the guide member and is arranged in the guide groove.

6. The cutting device according to any one of claims 1 to 4, characterized in that: The mechanical cutting member includes a first circular cutting knife and a second circular cutting knife, wherein the first circular cutting knife and the second circular cutting knife are respectively arranged on both sides of the strip along the thickness direction of the strip, and the first circular cutting knife and the second circular cutting knife are staggered along the width direction of the strip; The first circular cutting knife and the second circular cutting knife are both capable of switching between an avoidance position and a cutting position; when located in the avoidance position, the first circular cutting knife and the second circular cutting knife are both separated from the strip; when located in the cutting position, the first circular cutting knife and the second circular cutting knife at least partially overlap and rotate simultaneously to cut the strip and form the second cutting gap.

7. The cutting device according to claim 6, characterized in that: The overlapping dimension D of the first cutting circular blade and the second cutting circular blade satisfies the relationship: 0.5*T≤D≤T, where T is the thickness of the strip.

8. The cutting device according to any one of claims 1 to 4, characterized in that: The length L1 of the first cutting slit satisfies the relationship: 8 cm ≤ L1 ≤ 12 cm.

9. The cutting device according to any one of claims 1 to 4, characterized in that Also includes: a first reel, the first reel being disposed between the laser cutting element and the mechanical cutting element, the first reel being used to reel up the strip cut by the laser cutting element and unreel it toward the mechanical cutting element, wherein the first end portion of the reeled strip is located radially outward of the first reel; as well as The second reel is arranged on a side of the mechanical cutting component away from the laser cutting component, and the second reel is used for winding up the strip cut by the mechanical cutting component.

10. A cutting method for cutting a strip material, wherein the strip material comprises a first end portion and a second end portion sequentially arranged along its length direction, characterized in that: The cutting method comprises the following steps: S1. Laser cutting the strip to form a first cutting slit, wherein the first cutting slit is located in the middle of the strip along the width direction, and a length extension direction of the first cutting slit is parallel to the length direction of the strip. The first cutting slit includes a first cutting end portion proximate to the first end portion and a second cutting end portion proximate to the second end portion, and a first connecting portion is defined between the first cutting end portion and the first end portion. S2. Mechanically cut the strip from the second cutting end to form a second cutting slit, wherein the length extension direction of the second cutting slit is parallel to the length direction of the strip, and the second cutting slit includes a third cutting end close to the second end, and a second connecting portion is provided between the third cutting end and the second end.

Images