Main roller assembly and cutting equipment thereof

Abstract

The utility model discloses a main roller assembly and cutting equipment thereof. The main roller assembly comprises a plurality of first main rollers and a plurality of second main rollers. The multiple first wire groove parts of each first main roller are spaced in the second direction, and the first connecting parts are located between every two adjacent first wire groove parts. A plurality of second trunking parts of the second main roller are spaced in the second direction and are opposite to the first trunking parts, and the second connecting parts are located between every two adjacent second trunking parts. Wherein the two adjacent second wire slot parts are respectively a first sub-slot part and a second sub-slot part, and the second connecting part is inclined in the direction from the first sub-slot part to the second sub-slot part in the third direction. According to the main roller assembly, the manual participation degree is reduced, the wiring automation degree of cutting lines is improved, the production efficiency of silicon rod cutting is improved, and meanwhile, the main roller assembly is simple in structure, so that the production cost is reduced, and the market competitiveness of the main roller assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon slice cutting main rollers, in particular to a main roller assembly and cutting equipment thereof. Background Art

[0002] In the process of slicing photovoltaic silicon wafers, when the length of the silicon rod does not reach the full knife cutting length, in order to reduce the cost of photovoltaic silicon wafers, multiple shorter silicon rods are usually spliced ​​together to form multiple silicon rods for cutting. However, since there are seams between adjacent silicon rods, it is necessary to avoid the seams when laying out the cutting lines on the main roller to reduce the breakage rate of the cutting lines. However, in the related art, the cutting lines are often laid out manually to leave blank areas corresponding to the seams between the silicon rods, resulting in low efficiency in laying out the cutting lines, reducing the production efficiency of photovoltaic silicon wafers and increasing production costs. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a main roller assembly, which improves the automation of the wiring of the cutting line and improves the production efficiency of cutting silicon rods. At the same time, the structure of the main roller assembly is simple, thereby reducing the production cost.

[0004] Another object of the utility model is to provide a cutting device using the main roller assembly.

[0005] According to the main roller assembly of the first aspect of the utility model, it includes: a plurality of first main rollers, the plurality of first main rollers are spaced apart along a first direction, each of the first main rollers includes a plurality of first line groove portions and at least one first connecting portion, the plurality of first line groove portions are spaced apart along a second direction, and the first connecting portion is located between two adjacent first line groove portions; a second main roller, the second main roller is located on one side of the second main roller in a third direction, the second main roller includes a plurality of second line groove portions and at least one second connecting portion, the plurality of second line groove portions are spaced apart along the second direction and are opposite to the first line groove portions, and the second connecting portion is located between two adjacent second line groove portions, and the first direction, the second direction and the third direction are orthogonal to each other; wherein, two adjacent second line groove portions are respectively a first sub-groove portion and a second sub-groove portion, and in the third direction, the second connecting portion is inclined along the first sub-groove portion toward the direction of the second sub-groove portion.

[0006] According to the main roller assembly of the embodiment of the utility model, a first connection part is provided between two adjacent first line groove parts of the first main roller, and a second connection part is provided between two adjacent second line groove parts of the second main roller, the first connection part corresponds to the second connection part, and in the third direction, the second connection part is inclined along the first sub-groove part toward the second sub-groove part. Thus, the second connection part guides the cutting line, and after the cutting line falls into the bottom of the second connection part, it is routed between the second sub-groove part and the corresponding first line groove part, which reduces the degree of manual participation, improves the degree of automation of the wiring of the cutting line, and improves the production efficiency of cutting silicon rods. At the same time, the structure of the main roller assembly is simple, thereby reducing the production cost, which is conducive to improving the market competitiveness of the main roller assembly.

[0007] According to some embodiments of the present invention, the second connecting portion has a recessed groove, the recessed groove is adjacent to the second sub-groove portion, and the recessed groove is opposite to the first wire groove portion.

[0008] According to some embodiments of the present invention, the depth of the concave groove is h, wherein h satisfies: 190 μm≤h≤230 μm.

[0009] According to some embodiments of the present invention, the angle between the second connecting portion and the central axis of the second main roller is ɑ, wherein the ɑ satisfies: 80°≤ɑ≤85°.

[0010] According to some embodiments of the present invention, the length of the second connecting portion in the second direction is L 1 , wherein the L 1 Satisfy: 555.62μm≤L 1 ≤2060.21μm.

[0011] According to some embodiments of the present invention, the length of the second connection portion in the second direction is greater than the length of the first connection portion.

[0012] According to some embodiments of the present invention, the length of the first connecting portion in the second direction is L 2 , wherein the L 2 Meet: 500μm≤L 2 ≤2000μm.

[0013] According to some embodiments of the utility model, a plurality of first wire grooves are formed on each of the first wire groove portions, the plurality of first wire grooves are spaced apart along the second direction, and the minimum distance between two adjacent first wire grooves in the second direction is less than the length of the first connecting portion; and / or a plurality of second wire grooves are formed on each of the second wire groove portions, the plurality of second wire grooves are spaced apart along the second direction, and the minimum distance between two adjacent second wire grooves in the second direction is less than the length of the second connecting portion.

[0014] According to some embodiments of the present invention, the first wire groove, the second wire groove and the recessed groove are all V-shaped grooves.

[0015] The cutting device according to the second aspect of the present invention comprises the main roller assembly according to the first aspect of the present invention.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a partial schematic diagram of a main roller assembly according to an embodiment of the utility model;

[0019] Figure 2 is a partial schematic diagram of a first main roller of a main roller assembly according to an embodiment of the utility model;

[0020] Figure 3 is a partial schematic diagram of a second main roller of a main roller assembly according to an embodiment of the utility model;

[0021] Figure 4 is a partial schematic diagram of a main roller assembly according to an embodiment of the utility model;

[0022] Figure 5 yes Figure 4 The enlarged view of the A part shown in the middle circle;

[0023] Figure 6 It is a schematic diagram of the coordination between the main roller assembly and the cutting line according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 100: main roller assembly;

[0026] 1: first main roller; 11: first wire groove portion; 111: first wire groove; 12: first connecting portion; 2: second main roller; 21: second wire groove portion; 211: first sub-groove portion; 212: second sub-groove portion; 213: second wire groove; 22: second connecting portion; 221: recessed groove;

[0027] 200: Cutting line. DETAILED DESCRIPTION

[0028] Reference below Figure 1-Figure 6 The main roller assembly 100 according to the first embodiment of the present invention is described.

[0029] like Figure 1-Figure 6 As shown, the main roller assembly 100 according to the first embodiment of the utility model comprises a plurality of first main rollers 1 and a plurality of second main rollers 2. In the description of the utility model, "plurality" means two or more.

[0030] Specifically, the plurality of first main rollers 1 are arranged along a first direction (eg, Figure 6 In the left and right direction of the first main roller, each first main roller 1 includes a plurality of first groove portions 11 and at least one first connecting portion 12. The plurality of first groove portions 11 are spaced apart along the second direction (for example, Figure 4 The first connecting portion 12 is located between two adjacent first line groove portions 11. The second main roller 2 is located between the first main roller 1 in the third direction (for example, Figure 6 The second main roller 2 includes a plurality of second groove portions 21 and at least one second connection portion 22, wherein the plurality of second groove portions 21 are spaced apart along the second direction and are opposite to the first groove portion 11. The second connection portion 22 is located between two adjacent second groove portions 21, and the first direction, the second direction and the third direction are orthogonal to each other.

[0031] For example, in Figure 1-Figure 6 In the example, the main roller assembly 100 includes two first main rollers 1 and one second main roller 2, the two first main rollers 1 are spaced apart along a first direction, the second main roller 2 is located on one side of the two first main rollers 1 in a third direction, and the second main roller 2 is located between the two first main rollers 1, so that the two first main rollers 1 and one second main roller 2 are arranged roughly in a triangle in the third direction.

[0032] Reference Figure 4, the first main roller 1 includes twenty-four first line groove portions 11 and twenty-three first connecting portions 12. One first connecting portion 12 is provided between two adjacent first line groove portions 11 along the second direction. Correspondingly, the second main roller 2 includes twenty-four second line groove portions 21 and twenty-three second connecting portions 22. One second connecting portion 22 is provided between two adjacent second line groove portions 21 along the second direction. The twenty-four first line groove portions 11 and the twenty-four second line groove portions 21 correspond one-to-one in the third direction, and the twenty-three first connecting portions 12 and the twenty-three second connecting portions 22 correspond one-to-one in the third direction.

[0033] Among them, refer to Figure 3 , two adjacent second line grooves 21 are respectively a first sub-groove 211 and a second sub-groove 212, and in the third direction, the second connection portion 22 is inclined along the first sub-groove 211 toward the second sub-groove 212. Thus, when the cutting wire 200 falls on the second connection portion 22, the second connection portion 22 guides the cutting wire 200, and the cutting wire 200 falls to the bottom of the second connection portion 22, so that the cutting wire 200 does not run on the first connection portion 12 and the second connection portion 22, which is conducive to the cutting wire 200 avoiding the joints between the silicon rods, thereby reducing the wire breakage rate of the cutting wire 200.

[0034] In the related art, the cutting line 200 is routed to the first main roller 1 through manual routing, so that the cutting line 200 is not arranged at the position corresponding to the seam on the first main roller 1 .

[0035] During the routing process of the cutting line 200 in the present application, the cutting line 200 is initially positioned at one end of the first main roller 1 and the second main roller 2, and the first main roller 1 and the second main roller 2 rotate to allow the cutting line 200 to route normally between the first sub-groove portion 211 and the corresponding first wire groove portion 11; when the cutting line 200 is routed to the vicinity of the first connecting portion 12 and the second connecting portion 22, the cutting line 200 is manually slightly moved to avoid the first connecting portion 12, and at this time, the cutting line 200 does not route between the first connecting portion 12 and the second connecting portion 22, so that the cutting line 200 can avoid the joint; the cutting line 200 moves along the surface of the second connecting portion 22 and falls into the bottom of the second connecting portion 22, and then the cutting line 200 is manually slightly moved to route to the other side of the first connecting portion 12; the first main roller 1 and the second main roller 2 continue to rotate, and the cutting line 200 continues to route normally between the second sub-groove portion 212 and the corresponding first wire groove portion 11. Repeat the above wiring steps to form a cutting wire network on the main roller assembly 100. The wiring process of the cutting wire 200 reduces manual participation, improves the wiring automation of the cutting wire 200, improves the production efficiency of cutting silicon rods, and simplifies the structure of the main roller assembly 100, thereby reducing production costs and helping to improve the market competitiveness of the main roller assembly 100.

[0036] According to the main roller assembly 100 of the embodiment of the utility model, a first connection part 12 is provided between two adjacent first line groove parts 11 of the first main roller 1, and a second connection part 22 is provided between two adjacent second line groove parts 21 of the second main roller 2. The first connection part 12 corresponds to the second connection part 22, and in the third direction, the second connection part 22 is inclined along the first sub-groove part 211 toward the direction of the second sub-groove part 212. Thus, the second connection part 22 guides the cutting line 200, and after the cutting line 200 falls into the bottom of the second connection part 22, it is routed between the second sub-groove part 212 and the corresponding first line groove part 11, which reduces the degree of manual participation, improves the degree of automation of the wiring of the cutting line 200, and improves the production efficiency of cutting silicon rods. At the same time, the structure of the main roller assembly 100 is simple, thereby reducing the production cost, which is conducive to improving the market competitiveness of the main roller assembly 100.

[0037] According to some embodiments of the present invention, referring to Figure 3 , the second connection portion 22 has a concave groove 221, the concave groove 221 is adjacent to the second sub-groove portion 212, and the concave groove 221 is opposite to the first line groove portion 11. That is, in the second direction, the length of one end of the second connection portion 22 adjacent to the first sub-groove portion 211 in the radial direction of the second main roller 2 is larger, and the length of one end of the second connection portion 22 adjacent to the second sub-groove portion 212 in the radial direction of the second main roller 2 is smaller. Thus, the side wall of the second connection portion 22 and the end of the second sub-groove portion 212 adjacent to the second connection portion 22 jointly defines the concave groove 221.

[0038] When the cutting line 200 passes through the second connecting part 22 of the second main roller 2, it moves to the recessed groove 221 under the guidance of the second connecting part 22, and then is wired through the recessed groove 221 to the corresponding first wire groove part 11, thereby completing the arrangement of the cutting line 200 between the first main roller 1 and the second main roller 2. The cutting line 200 is not arranged on the first connecting part 12 of the first main roller 1, so that the cutting line 200 avoids the joints, thereby avoiding damage to the cutting line 200 caused by the joints, and extending the service life of the cutting line 200.

[0039] Further, refer to Figure 3, the depth of the concave groove 221 is h, where h satisfies: 190μm≤h≤230μm. When h<190μm, the depth of the concave groove 221 is small, and the cutting line 200 is easy to jump out of the concave groove 221, thereby reducing the stability of the cutting line 200 in the concave groove 221; when h>230μm, the depth of the concave groove 221 is large, which will reduce the structural strength of the second main roller 2, thereby reducing the service life of the second main roller 2. Therefore, by setting the depth of the concave groove 221 to 190μm≤h≤230μm, the stability of the cutting line 200 in the concave groove 221 is increased, while the structural strength of the second main roller 2 is ensured, and the service life of the second main roller 2 is extended.

[0040] According to some embodiments of the present invention, referring to Figure 3 , the angle between the second connecting portion 22 and the central axis of the second main roller 2 is ɑ, where ɑ satisfies: 80°≤ɑ≤85°. When ɑ<80°, the angle between the second connecting portion 22 and the central axis of the second main roller 2 is small. When the maximum length of the second connecting portion 22 in the radial direction of the second main roller 2 remains unchanged, the length of the first connecting portion 12 in the second direction is extended, part of the silicon rod near the seam is wasted, and the production cost of the silicon wafer is increased; when ɑ>85°, the angle between the second connecting portion 22 and the central axis of the second main roller 2 is large. When the maximum length of the second connecting portion 22 in the radial direction of the second main roller 2 remains unchanged, the corresponding length of the first connecting portion 12 is small, so that the cutting line 200 cannot completely avoid the seam, that is, the seam will still cause wear to the cutting line 200. Therefore, by setting the angle between the second connecting part 22 and the central axis of the second main roller 2 to 80°≤ɑ≤85°, so that the length of the first connecting part 12 in the second direction corresponds to the length of the joint in the second direction, even if the cutting line 200 can completely avoid the joint and avoid damage to the cutting line 200 caused by the joint, it is ensured that the cutting line 200 can smoothly cut the silicon rods, improve the quality of silicon wafers, and avoid wasting silicon rods.

[0041] According to some embodiments of the present invention, referring to Figure 3 , the length of the second connecting portion 22 in the second direction is L 1 , where L 1 Satisfy: 555.62μm≤L 1 ≤2060.21μm. When L 1 When L is less than 555.62 μm, the length of the second connecting portion 22 in the second direction is small, and the corresponding length of the first connecting portion 12 is small, so it is difficult to form a misalignment with the joints between adjacent silicon rods, so that the joints may also cause damage to the cutting line 200; when L 1>2060.21μm, the length of the second connecting portion 22 in the second direction is relatively large. When the cutting line 200 is laid out from the second main roller 2 to the first main roller 1, the corresponding first connecting portion 12 has a relatively long length in the second direction, which wastes part of the silicon rod near the joint and increases the production cost of the silicon wafer. Therefore, by setting the length of the second connecting portion 22 in the second direction to 555.62μm≤L 1 ≤2060.21μm, so that the design of the length of the second connecting portion 22 in the second direction is more reasonable, so that when the cutting line 200 is laid out to the first main roller 1 through the second main roller 2, the length of the corresponding first connecting portion 12 in the second direction corresponds to the length of the joint in the second direction, thereby avoiding waste of silicon rods and damage to the cutting line 200 caused by the joint, ensuring that the cutting line 200 can smoothly cut the silicon rods and improve the quality of silicon wafers.

[0042] Among them, the length of the second connection part 22 in the second direction is greater than the length of the first connection part 12. In this way, the length of the second connection part 22 is larger, ensuring that the cutting line 200 does not pass through the first connection part 12, even if the cutting line 200 avoids the joint, the joint avoids damage to the cutting line 200, ensuring that the cutting line 200 smoothly cuts the silicon rod, and improving the quality of the silicon wafer.

[0043] According to some embodiments of the present invention, referring to Figure 2 , the length of the first connecting portion 12 in the second direction is L 2 , where L 2 Meet: 500μm≤L 2 ≤2000μm. When L 2 When L is less than 500 μm, the length of the first connecting portion 12 in the second direction is small, so that the cutting line 200 cannot completely avoid the joint, and the joint may also cause damage to the cutting line 200; when L 2 When the length of the first connecting portion 12 in the second direction is 500 μm or less, the length of the first connecting portion 12 in the second direction is relatively large, which wastes part of the silicon rod near the joint and increases the production cost of the silicon wafer. 2 ≤2000μm, so that the design of the length of the first connecting portion 12 in the second direction is more reasonable, and the length of the first connecting portion 12 in the second direction corresponds to the length of the seam in the second direction, so as to avoid the seam from damaging the cutting line 200, ensure that the cutting line 200 can smoothly cut the silicon rod, improve the quality of the silicon wafer, and also avoid wasting the silicon rod.

[0044] According to some specific embodiments of the present invention, Figure 2A plurality of first wire grooves 111 are formed on each first wire groove portion 11, and the plurality of first wire grooves 111 are spaced apart along the second direction, and the minimum distance between two adjacent first wire grooves 111 in the second direction is less than the length of the first connecting portion 12. The minimum distance between two adjacent first wire grooves 111 in the second direction corresponds to the thickness of the silicon wafer, so that the minimum distance between two adjacent first wire grooves 111 is smaller, and the thickness of the cut silicon wafer is smaller, which is suitable for the demand for thin silicon wafers.

[0045] The first connection part 12 corresponds to the joint of the silicon rod, so that the length of the first connection part 12 in the second direction is larger, avoiding the joint and the cutting line 200 from contacting each other due to the joint being longer and the first connection part 12 being shorter, thereby avoiding the joint from wearing the cutting line 200 and extending the service life of the cutting line 200.

[0046] Reference Figure 3 , a plurality of second wire grooves 213 are formed on each second wire groove portion 21, and the plurality of second wire grooves 213 are spaced apart along the second direction, and the minimum distance between two adjacent second wire grooves 213 in the second direction is less than the length of the second connecting portion 22. The cutting wire 200 is routed to the first wire groove 111 after passing through the second wire groove 213. When the minimum distance between two adjacent second wire grooves 213 is large, the number of second wire grooves 213 is less than the number of first wire grooves 111 on the first main roller 1 within the limited length of the second wire groove portion 21 corresponding to the second main roller 2, thereby reducing the number of cutting wires 200 arranged in the first wire groove portion 11 in the axial direction of the first main roller 1, thereby reducing the number of silicon wafers cut, wasting part of the silicon rods, and increasing the cost of silicon wafer cutting. Therefore, the minimum distance between two adjacent second wire grooves 213 in the second direction is small, ensuring the number of second wire grooves 213 in the second wire groove portion 21, so as to increase the number of silicon rods cut into silicon wafers. The length of the second connection part 22 corresponds to the first connection part 12, so that the length of the second connection part 22 is longer, which is beneficial to increase the length of the first connection part 12 on the first main roller 1 in the second direction, avoid the seam wearing the cutting line 200, and extend the service life of the cutting line 200.

[0047] Further, refer to Figure 2 and Figure 3, the first wire groove 111, the second wire groove 213 and the concave groove 221 are all V-shaped grooves. Therefore, the cross-sectional area of ​​the first wire groove 111 away from the center of the first main roller 1 is the largest, the cross-sectional area of ​​the second wire groove 213 away from the center of the second main roller 2 is the largest, and the cross-sectional area of ​​the concave groove 221 away from the center of the second main roller 2 is the largest, which is conducive to the cutting wire 200 entering the first wire groove 111, the second wire groove 213 and the concave groove 221. The cross-sectional area of ​​the first wire groove 111 close to the center of the first main roller 1 is the smallest, the cross-sectional area of ​​the second wire groove 213 close to the center of the second main roller 2 is the smallest, and the cross-sectional area of ​​the recessed groove 221 close to the center of the second main roller 2 is the smallest, so as to increase the stability of the cutting line 200 in the first wire groove 111, the second wire groove 213 and the recessed groove 221, reduce the risk of the cutting line 200 shaking at the bottom of the first wire groove 111, the second wire groove 213 and the recessed groove 221, and reduce the width of the bottom of the first wire groove 111, the second wire groove 213 and the recessed groove 221, which is beneficial to improve the structural strength of the first main roller 1 and the second main roller 2, and enhance the supporting effect of the bottom wall of the first wire groove 111, the second wire groove 213 and the recessed groove 221 on the cutting line 200, thereby improving the cutting quality of the cutting line 200 on the silicon rod and the quality of the silicon wafer.

[0048] The cutting device according to the embodiment of the second aspect of the utility model comprises the main roller assembly 100 according to the embodiment of the first aspect of the utility model.

[0049] The cutting equipment according to the embodiment of the utility model, by adopting the above-mentioned main roller assembly 100, is conducive to improving the cutting stability and cutting effect, improving the quality of silicon wafers, and thus improving the market competitiveness of the cutting equipment.

[0050] Other structures and operations of the main roller assembly 100 and the cutting device according to the embodiment of the utility model are well known to those skilled in the art and will not be described in detail here.

[0051] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A main roller assembly, characterized in that: include: A plurality of first main rollers, wherein the plurality of first main rollers are spaced apart along a first direction, each of the first main rollers comprises a plurality of first line groove portions and at least one first connecting portion, the plurality of first line groove portions are spaced apart along a second direction, and the first connecting portion is located between two adjacent first line groove portions; a second main roller, the second main roller being located at one side of the second main roller in the third direction, the second main roller comprising a plurality of second line groove portions and at least one second connecting portion, the plurality of second line groove portions being spaced apart along the second direction and opposite to the first line groove portion, the second connecting portion being located between two adjacent second line groove portions, the first direction, the second direction and the third direction being orthogonal to each other; The two adjacent second line groove portions are respectively a first sub-groove portion and a second sub-groove portion, and in the third direction, the second connecting portion is inclined along the first sub-groove portion toward the second sub-groove portion.

2. The main roller assembly according to claim 1, characterized in that: The second connecting portion has a concave groove, the concave groove is adjacent to the second sub-groove portion, and the concave groove is opposite to the first wire groove portion.

3. The main roller assembly according to claim 2, characterized in that: The depth of the concave groove is h, wherein h satisfies: 190 μm≤h≤230 μm.

4. The main roller assembly according to claim 1, characterized in that: The included angle between the second connecting portion and the central axis of the second main roller is ɑ, wherein ɑ satisfies: 80°≤ɑ≤85°.

5. The main roller assembly according to claim 1, characterized in that: The length of the second connection portion in the second direction is L1, wherein L1 satisfies: 555.62 μm≤L1≤2060.21 μm.

6. The main roller assembly according to any one of claims 1 to 5, characterized in that: The length of the second connection portion in the second direction is greater than the length of the first connection portion.

7. The main roller assembly according to claim 1, characterized in that: The length of the first connection portion in the second direction is L2, wherein L2 satisfies: 500 μm≤L2≤2000 μm.

8. The main roller assembly according to claim 2, characterized in that: A plurality of first wire grooves are formed on each of the first wire groove portions, the plurality of first wire grooves are spaced apart along the second direction, and a minimum distance between two adjacent first wire grooves in the second direction is less than a length of the first connecting portion; and / or A plurality of second wire grooves are formed on each of the second wire groove portions. The plurality of second wire grooves are spaced apart along the second direction. The minimum distance between two adjacent second wire grooves in the second direction is less than the length of the second connecting portion.

9. The main roller assembly according to claim 8, characterized in that: The first wire groove, the second wire groove and the concave groove are all V-shaped grooves.

10. A cutting device, characterized in that: Comprising the main roller assembly according to any one of claims 1-9.

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