Main roller and slicing machine

Abstract

The main roller is provided with a plurality of trunking sets which are sequentially arranged in the axial direction, and each trunking set comprises a first trunking and a second trunking which are adjacent to each other; the first wire groove and the second wire groove are respectively provided with two side walls which are oppositely arranged and have different inclination angles, and the inclination angles of the side walls refer to the angles of included angles between the side walls and the direction perpendicular to the axial direction of the main roller; in the adjacent first wire duct and second wire duct, the inclination angle of one side wall is close to the inclination angle of the adjacent side wall of the other wire duct, and the inclination directions of the two adjacent side walls are opposite. In the embodiment of the utility model, through the arrangement of the first wire slots and the second wire slots, which are different in slot type, on the main roller, the twisting direction of the cutting wire can be continuously changed when the cutting wire advances on the first wire slots and the second wire slots, so that the cutting capability of the cutting wire can be enhanced, and the wire breakage rate of the cutting wire can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of silicon rod slicing technology, and in particular to a main roller and slicing machine. Background Technology

[0002] Currently, silicon rods are typically sliced ​​using a slicing machine, which includes a main roller and cutting wires laid on the main roller. The main roller has several grooves engraved on it, and the cutting wires are wound around the grooves to form a wire mesh.

[0003] However, when the cutting wire rotates at high speed in the groove of the main roller, it will rotate on one side, increasing the internal stress and torque of the cutting wire. The high torque of the cutting wire will cause the cutting wire to deform to varying degrees, making the cutting wire prone to breakage and surface damage. After the surface is damaged, the diamond grit will fall off, which will easily lead to weakened cutting force, large wire bow, or even wire breakage. Utility Model Content

[0004] This invention provides a main roller and a slicing machine, aiming to at least solve the technical problems in the prior art of weakened cutting ability and high breakage rate of the cutting wire caused by the continuous increase of the cutting wire torque.

[0005] In a first aspect, the present invention provides a main roller having a plurality of groove groups arranged sequentially along the axial direction, the groove groups including adjacent first grooves and second grooves.

[0006] The first groove and the second groove each have two sidewalls that are arranged opposite each other and have different inclination angles. The inclination angle of the sidewall refers to the angle between the sidewall and the direction perpendicular to the axial direction of the main roller.

[0007] In the adjacent first and second slots, the inclination angle of one sidewall is similar to that of the adjacent sidewall of the other slot, and the inclination directions of the two adjacent sidewalls are opposite.

[0008] Optionally, the inclination angles of the two sidewalls in the first groove are a first angle and a second angle, respectively. The first angle is greater than or equal to 40 degrees and less than or equal to 45 degrees, and the second angle is greater than or equal to 0 degrees and less than or equal to 13 degrees.

[0009] The inclination angles of the two sidewalls in the second groove are the third angle and the fourth angle, respectively. The third angle is greater than or equal to 40 degrees and less than or equal to 45 degrees, and the fourth angle is greater than or equal to 0 degrees and less than or equal to 13 degrees.

[0010] Optionally, the main roller includes a cutting section and a pre-cutting section, the pre-cutting section being disposed at at least one end of the main roller, and the first groove and the second groove being formed on the pre-cutting section.

[0011] Optionally, the main roller includes a main roller body consisting of the cutting section and at least one pre-cut section;

[0012] The ratio of the length of the pre-cut section along the axial direction of the main roller to the length of the main roller body along the axial direction of the main roller is greater than or equal to 0.025 and less than or equal to 0.1.

[0013] Optionally, along the axial direction of the main roller, the cutting section has a plurality of intermediate grooves, and the distance between adjacent first grooves and second grooves in the pre-cutting section is greater than or equal to the distance between two adjacent intermediate grooves in the cutting section.

[0014] Optionally, the adjacent first and second grooves are arranged symmetrically with respect to their centerlines.

[0015] Optionally, along the axial direction of the main roller, the width of the first groove is less than or equal to the width of the intermediate groove.

[0016] Optionally, the first groove and the second groove each have a groove bottom connecting the two sidewalls, and the groove bottom is arc-shaped.

[0017] Optionally, the ratio of the depth of the bottom of the first groove to the depth of the first groove is greater than or equal to 0.15 and less than or equal to 0.2.

[0018] The ratio of the depth of the bottom of the second groove to the depth of the second groove is greater than or equal to 0.15 and less than or equal to 0.2.

[0019] Optionally, in adjacent first and second grooves, the difference in the inclination angle between one sidewall and the adjacent sidewall of the other groove is less than or equal to 5 degrees.

[0020] Secondly, this utility model provides a slicing machine, including a cutting wire and a main roller assembly. The cutting wire is wound around the main roller assembly to form a cutting wire mesh, and the main roller assembly includes at least one main roller as described above.

[0021] In this embodiment of the invention, by setting two grooves of different shapes, the first and second grooves, on the main roller, the twisting direction of the cutting wire can be adjusted. The twisting direction of the cutting wire in the first groove is opposite to that in the second groove. As the cutting wire travels through multiple first and second grooves, the twisting direction continuously changes, resulting in lower torque. This enhances the cutting ability of the cutting wire, reduces the breakage rate, and avoids increased torque caused by continuous unilateral rotation. Consequently, it avoids weakened cutting force and large wire bowing leading to breakage due to high torque. Furthermore, reducing the breakage rate lowers the cost of the cutting wire and improves the yield of silicon wafer cutting. Moreover, by adjusting the twisting direction of the cutting wire at multiple first and second grooves, it avoids increased torque and varying degrees of deformation caused by continuous unilateral rotation, thus preventing any impact on cutting efficiency.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are specific embodiments of this utility model. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall structure of a main roller provided in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of a main roller cooperating with a cutting line, provided by an embodiment of the present invention;

[0025] Figure 3 This is a partial structural diagram of another main roller provided in an embodiment of the present utility model;

[0026] Figure 4 A schematic diagram of the main roller assembly and cutting line in a slicer provided by an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the main roller assembly and cutting line in another slicer provided in an embodiment of the present invention.

[0028] Figure label:

[0029] 1-Main roller, 11-Pre-cut section, 12-Cut section, 13-Intermediate groove, 14-First groove, 15-Second groove, 16-Side wall, 17-Groove bottom, 18-Main roller body, 2-Cutting line, 3-Conventional main roller. Detailed Implementation

[0030] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0031] The existing main roller has several symmetrical V-shaped grooves. However, when the cutting wire rotates at high speed within the grooves of the main roller, it rotates on one side, increasing the internal stress and torque of the cutting wire. High torque causes the cutting wire to deform to varying degrees, making it prone to breakage and nickel layer damage. Damage to the nickel layer leads to the shedding of the diamond grit, resulting in weakened cutting force, large wire bowing, and wire breakage. To solve these problems, this utility model provides a main roller and a slicing machine, which are described in detail below.

[0032] Firstly, referring to Figures 1 to 3 This utility model embodiment discloses a main roller 1, which has a plurality of groove groups arranged sequentially along the axial direction. The groove groups include adjacent first grooves 14 and second grooves 15. The first grooves 14 and second grooves 15 each have two sidewalls 16 arranged opposite each other and with different inclination angles. The inclination angle of the sidewall 16 refers to the angle between the sidewall 16 and the direction perpendicular to the axial direction of the main roller 1. In adjacent first grooves 14 and second grooves 15, the inclination angle of one sidewall 16 is similar to that of the adjacent sidewall 16 of the other groove, and the inclination directions of the two adjacent sidewalls are opposite.

[0033] The first groove 14 and the second groove 15 are arranged sequentially along the axial direction of the main roller 1, that is, the first groove 14 and the second groove 15 are spaced apart and alternately arranged along the axial direction of the main roller 1, with the first groove 14 adjacent to the second groove 15 and the second groove 15 adjacent to the first groove 14. The direction perpendicular to the axial direction of the main roller 1 can be referred to... Figure 3 The direction is indicated by the dashed line A in the middle. It should be noted that "similar tilt angles" means that the difference in tilt angles is less than or equal to the set angle. The set angle can be set according to actual needs, for example, it can be set to 5 degrees.

[0034] The first groove 14 can be a V-shaped groove, and the second groove 15 can be a V-shaped groove. The inclination directions of the sidewall 16 with the largest inclination angle in the first groove 14 and the second groove 15 are opposite. The main roller 1 has a first side and a second side arranged opposite to each other along its axial direction. The inclination direction of the sidewall 16 with the largest inclination angle in the first groove 14 faces the first side of the main roller 1, and the inclination direction of the sidewall 16 with the largest inclination angle in the second groove 15 faces the second side of the main roller 1. The inclination angle of the sidewall 16 with the largest inclination angle in the first groove 14 can be referred to... Figure 3 The tilt angle of the sidewall 16 with the largest tilt angle in the second groove 15, as shown in α1, can be referenced. Figure 3 As shown in the diagram, α2. The cutting line 2 is twisted in both the first groove 14 and the second groove 15 toward the sidewall 16 with the largest inclination angle.

[0035] In one embodiment, the sidewalls 16 with the smallest inclination angle in both the first groove 14 and the second groove 15 are parallel to the direction perpendicular to the axial direction of the main roller 1; that is, the inclination angle of the sidewalls 16 with the smallest inclination angle in the first groove 14 and the second groove 15 relative to the direction perpendicular to the axial direction of the main roller 1 is 0. In another embodiment, the inclination angle of the sidewalls 16 with the smallest inclination angle in the first groove 14 and the second groove 15 is not 0, and the inclination directions of the sidewalls 16 with the smallest inclination angle in the first groove 14 and the second groove 15 are opposite. The inclination direction of the sidewall 16 with the smallest inclination angle in the first groove 14 faces the second side of the main roller 1, and the inclination direction of the sidewall 16 with the smallest inclination angle in the second groove 15 faces the first side of the main roller 1.

[0036] Thinning the silicon wafer cutting wire is one of the important ways to reduce silicon wafer costs. However, the thinner the wire diameter, the more frequent the wire breakage, especially on the inlet and outlet sides. In this embodiment, by setting two different groove types, the first groove 14 and the second groove 15, on the main roller 1, the twisting direction of the cutting wire 2 can be adjusted. The twisting direction of the cutting wire 2 in the first groove 14 is opposite to that in the second groove 15. As the cutting wire 2 travels through multiple first grooves 14 and second grooves 15, the twisting direction continuously changes, resulting in lower torque on the cutting wire 2. This enhances the cutting ability of the cutting wire, reduces the breakage rate, and avoids increased torque caused by continuous unilateral rotation of the cutting wire. Furthermore, it avoids weakened cutting force and large wire bowing leading to breakage due to high cutting wire torque.

[0037] A high breakage rate in the dicing wire increases its cost and reduces the yield of silicon wafer cutting. This invention reduces the breakage rate, thereby lowering the cost and improving the yield. High torque in the dicing wire causes varying degrees of deformation, reducing cutting efficiency. This invention adjusts the twisting direction of the dicing wire 2 at multiple first grooves 14 and second grooves 15 to avoid increased torque and deformation caused by continuous unilateral rotation, thus preventing any impact on cutting efficiency.

[0038] In an optional embodiment of this utility model, the inclination angles of the two sidewalls 16 in the first groove 14 are a first angle and a second angle, respectively. The first angle is greater than or equal to 40 degrees and less than or equal to 45 degrees, and the second angle is greater than or equal to 0 degrees and less than or equal to 13 degrees. The inclination angles of the two sidewalls 16 in the second groove 15 are a third angle and a fourth angle, respectively. The third angle is greater than or equal to 40 degrees and less than or equal to 45 degrees, and the fourth angle is greater than or equal to 0 degrees and less than or equal to 13 degrees.

[0039] The first angle is greater than the second angle. The first angle is also the inclination angle of the sidewall 16 with the largest inclination angle in the first groove 14. The first angle can be referred to... Figure 3 α1 is shown in the diagram. The first angle can be 40 degrees, 41 degrees, 42 degrees, 43 degrees, 44 degrees, 45 degrees, etc. The second angle can be 0 degrees, 5 degrees, 8 degrees, 10 degrees, 11 degrees, 13 degrees, etc. The third angle is greater than the fourth angle. The third angle is also the inclination angle of the sidewall 16 with the largest inclination angle in the second groove 15. The third angle can be referenced. Figure 3 α2 is shown in the figure. The third angle can be 40 degrees, 41 degrees, 42 degrees, 43 degrees, 44 degrees, 45 degrees, etc. The fourth angle can be 0 degrees, 5 degrees, 8 degrees, 10 degrees, 11 degrees, 13 degrees, etc. In this embodiment of the present invention, the difference between the first angle and the second angle in the first groove 14 and the second groove 15 is relatively large, which is beneficial for the cutting line 2 to twist in the first groove 14 and the second groove 15 towards the side wall 16 with the largest inclination angle.

[0040] In an optional embodiment of this utility model, reference is made to Figure 1 and Figure 2 The main roller 1 includes a cutting section 12 and a pre-cutting section 11. The pre-cutting section 11 is disposed at at least one end of the main roller 1, and a first groove 14 and a second groove 15 are formed on the pre-cutting section 11.

[0041] Preferably, the two ends of the main roller 1 are pre-cutting sections 11, and the middle of the main roller 1 is a cutting section 12. The pre-cutting sections 11 and the cutting section 12 are coaxially arranged. This main roller 1 can be applied to a two-roller assembly. The two pre-cutting sections 11 at both ends of the main roller 1 can be symmetrical or asymmetrical with respect to the center line of the length of the main roller 1. The twisting direction of the cutting line 2 changes continuously as it travels on the pre-cutting section 11, thereby reducing the torque when the cutting line 2 enters the cutting section 12 and optimizing the torsional stability of the cutting line 2 at the cutting section 12.

[0042] The main roller 1 is rotatable, and its rotation drives the cutting wire mesh formed by the cutting wires 2 to move forward. The main roller 1 has an inlet side and an outlet side arranged opposite to each other. When cutting silicon rods with the cutting wire mesh formed by the cutting wires 2, a bidirectional reciprocating cutting method can be adopted. The bidirectional reciprocating cutting process includes an inlet stage and a return stage. In the inlet stage, the main roller 1 rotates forward, and the cutting wire 2 moves from the inlet side to the cutting section 12. In the return stage, the main roller 1 rotates in reverse, and the cutting wire 2 returns from the outlet side to the cutting section 12. The main roller 1 can periodically rotate forward and reverse to drive the cutting wires to reciprocate. Therefore, either end of the main roller 1 will be the end where the cutting wire 2 enters at different times. By setting two pre-cutting sections 11 at both ends of the main roller 1, it can be ensured that the torsional direction of the cutting wire 2 can be adjusted during the reciprocating cutting process to avoid the continuous increase of the cutting wire torque during the reciprocating cutting process.

[0043] In an optional embodiment of the present invention, the main roller 1 includes a main roller body 18 composed of a cutting section 12 and at least one pre-cut section 11; the ratio of the length of the pre-cut section 11 along the axial direction of the main roller 1 to the length of the main roller body 18 along the axial direction of the main roller 1 is greater than or equal to 0.025 and less than or equal to 0.1.

[0044] When the main roller 1 includes two pre-cut sections 11, the lengths of the two pre-cut sections 11 along the axial direction of the main roller 1 can be referred to respectively. Figure 1 As shown in the diagram, the lengths L2 and L3 of the two pre-cut sections 11 along the axial direction of the main roller 1 can be equal or unequal. The length of the main roller body 18 along the axial direction of the main roller 1 can be referenced... Figure 1The ratio of the length L2 or L3 of the pre-cutting segment 11 along the axial direction of the main roller 1 to the length L of the main roller body 18 along the axial direction of the main roller 1 can be 0.025, 0.03, 0.035, 0.04, 0.05, 0.1, etc., that is, the length L2 or L3 of the pre-cutting segment 11 along the axial direction of the main roller 1 can be 2.5%, 3%, 3.5%, 4%, 5%, 10%, etc. of the length L of the main roller body 18 along the axial direction of the main roller 1. In this embodiment, when the ratio of the length of the pre-cutting segment 11 along the axial direction of the main roller 1 to the length of the main roller body 18 along the axial direction of the main roller 1 is within the above range, the adjustment effect of the torsion of the cutting line 2 can be guaranteed, while avoiding excessive influence on the length of the cutting segment 12.

[0045] The ratio of the length of the cutting segment 12 along the axial direction of the main roller 1 to the length of the main roller body 18 along the axial direction of the main roller 1 is greater than or equal to 0.8 and less than or equal to 0.95. The length of the cutting segment 12 along the axial direction of the main roller 1 can be determined by referring to... Figure 1 As shown in the diagram, the length L1 of the cutting segment 12 along the axial direction of the main roller 1 is greater than or equal to the length of the silicon rod to be cut. During slicing, the axial direction of the silicon rod is parallel to the axial direction of the cutting segment 12, and the length L1 of the cutting segment 12 along the axial direction of the main roller 1 is greater than or equal to the length of the silicon rod to be cut. Therefore, the silicon rod can be completely within the axial range of the cutting segment 12. The ratio of the length L1 of the cutting segment 12 along the axial direction of the main roller 1 to the length L of the main roller body 18 along the axial direction of the main roller 1 can be 0.8, 0.85, 0.9, 0.92, 0.94, 0.95, etc., that is, the length L1 of the cutting segment 12 along the axial direction of the main roller 1 can be 80%, 85%, 90%, 92%, 94%, 95%, etc., of the length L of the main roller body 18 along the axial direction of the main roller 1.

[0046] In an optional embodiment of the present invention, the cutting segment 12 has a plurality of intermediate grooves 13, and the distance between adjacent first grooves 14 and second grooves 15 in the pre-cut segment 11 is greater than or equal to the distance between two adjacent intermediate grooves 13 in the cutting segment 12.

[0047] The intermediate groove 13 can be a V-shaped groove with an arc-shaped bottom, wherein the inclination angles of the two oppositely arranged sidewalls in the V-shaped groove are the same. Along the axial direction of the main roller 1, the spacing between adjacent first grooves 14 and second grooves 15 in the pre-cut section 11 can be referenced... Figure 2 As shown in the figure, the spacing between two adjacent intermediate grooves 13 in the cut segment 12 can be referenced. Figure 2As shown in the diagram, D2. Along the axial direction of the main roller 1, when the distance D1 between adjacent first groove 14 and second groove 15 in the pre-cutting section 11 is greater than the distance D2 between two adjacent intermediate grooves 13 in the cutting section 12, the pre-cutting section 11 and the cutting section 12 can be clearly distinguished. Along the axial direction of the main roller 1, the distance D1 between adjacent first groove 14 and second groove 15 in the pre-cutting section 11 can be set according to actual needs, such as 20µm-50µm.

[0048] The main roller 1 includes a roller core and a wear-resistant coating on the surface of the roller core. The intermediate groove 13, the first groove 14, and the second groove 15 are all formed on the wear-resistant coating. The roller core can be made of metal, and the wear-resistant coating can be made of a material with wear-resistant properties, such as polyurethane or polytetrafluoroethylene. When machining the intermediate groove 13, the first groove 14, and the second groove 15 with a cutting tool, the intermediate groove 13, the first groove 14, and the second groove 15 are machined on the circumferential surface of the wear-resistant coating; that is, the material of the intermediate groove 13, the first groove 14, and the second groove 15 is the same as the material of the wear-resistant coating. The wear-resistant coating improves the wear resistance of the main roller 1, thereby extending its service life.

[0049] In an optional embodiment of this utility model, the adjacent first groove 14 and second groove 15 are arranged symmetrically with respect to their center lines, so that the adjustment effect of the cutting line 2 on the torsion direction is consistent whether it enters from the first groove 14 to the second groove 15 or from the second groove 15 to the first groove 14.

[0050] In an optional embodiment of this utility model, along the axial direction of the main roller 1, the width of the first groove 14 is less than or equal to the width of the intermediate groove 13. The first groove 14 has an opening, and the width of the first groove 14 specifically refers to the distance between the ends of the two sidewalls 16 near the opening. The width of the first groove 14 is greater than the diameter of the cutting line 2, and the width of the first groove 14 can be set according to actual needs; this embodiment does not impose any restrictions on this. The intermediate groove 13 has an opening, and the width of the intermediate groove 13 specifically refers to the distance between the ends of the two sidewalls near the opening. The width of the intermediate groove 13 is preferably greater than the width of the first groove 14. The width of the intermediate groove 13 can be set according to actual needs; this embodiment does not impose any restrictions on this.

[0051] In an optional embodiment of this utility model, the first groove 14 and the second groove 15 each have a groove bottom 17 connecting the two sidewalls 16, and the groove bottom 17 is arc-shaped. The groove bottom 17 is used to contact the cutting line 2. The radius of the arc of the groove bottom 17 can be set according to actual needs, for example, 0.03mm-0.05mm.

[0052] In an optional embodiment of this utility model, the ratio of the depth of the bottom 17 in the first groove 14 to the depth of the first groove 14 is greater than or equal to 0.15 and less than or equal to 0.2; the ratio of the depth of the bottom 17 in the second groove 15 to the depth of the second groove 15 is greater than or equal to 0.15 and less than or equal to 0.2. Specifically, the depth of the bottom 17 in the first groove 14 refers to the distance between the end of the bottom 17 near the groove opening and the end of the bottom 17 away from the groove opening in a direction perpendicular to the axial direction of the main roller 1. Specifically, the depth of the first groove 14 refers to the distance between the end of the first groove 14 near the groove opening and the end of the first groove 14 away from the groove opening in a direction perpendicular to the axial direction of the main roller 1. The ratio of the depth of the bottom 17 in the first groove 14 to the depth of the first groove 14 can be 0.15, 0.17, 0.18, 0.19, 0.2, etc. The ratio of the depth of the bottom 17 of the second groove 15 to the total depth of the second groove 15 can be 0.15, 0.16, 0.17, 0.18, 0.2, etc. When the ratio of the depth of the bottom 17 to the total depth of the groove is within the above range, the depth of the bottom 17 is relatively small, ensuring that the sidewall 16 has sufficient depth, thereby ensuring the adjustment effect of the torsion of the cutting line 2.

[0053] The grooves on existing main rollers are generally V-shaped without an arc-shaped bottom. During the silicon wafer cutting process, as the cutting wire falls, it partially contacts the inner wall of the groove. This is a line contact, meaning the contact area between the cutting wire and the inner wall is small, resulting in relatively weak support from the inner wall of the groove. In this embodiment, the first groove 14 and the second groove 15 each have an arc-shaped bottom 17 connecting the two sidewalls 16. When the cutting wire 2 falls into the first groove 14 and the second groove 15, it can form surface contact with the bottom 17 and the sidewalls 16 of the first and second grooves. This increases the contact area between the cutting wire 2 and the first and second grooves 14 and 15, allowing the first and second grooves 14 and 15 to better support the cutting wire 2 and improve its cutting stability.

[0054] In an optional embodiment of this utility model, reference is made to Figure 3 The first groove 14 and the second groove 15 are opened on the main roller 1 in the entire area of ​​the winding.

[0055] In this embodiment, reference is made to Figure 5The main roller 1 needs to be used in conjunction with a conventional main roller 3. The conventional main roller 3 has several identical grooves, which can be V-shaped grooves with an arc-shaped bottom. This main roller 1 can be applied to a three-roll assembly, which may include one main roller 1 and two conventional main rollers 3. The two conventional main rollers 3 are arranged in parallel, with the main roller 1 located below the two conventional main rollers 3. The twisting direction of the cutting wire 2 changes continuously as it travels on the main roller 1, which can optimize the torsional stability of the normal cutting area of ​​the cutting wire 2 on the conventional main roller 3. In this embodiment, the area involved in cutting in the three-roll assembly is the area between the two conventional main rollers 3. When the entire area on the main roller 1 involved in winding has the first groove 14 and the second groove 15, the twisting direction of the cutting wire during the entire journey can be adjusted without affecting the length of the normal cutting area between the two conventional main rollers 3.

[0056] In an optional embodiment of this utility model, the number of first grooves 14 is equal to the number of second grooves 15, so as to more effectively reduce the breakage rate of the cutting wire.

[0057] The first groove 14 and the second groove 15 can be machined using a forming tool, the shape of which is adapted to the shape of the first groove 14 and the second groove 15. Alternatively, the first groove 14 and the second groove 15 can be machined using a contour machining method with a tool.

[0058] Secondly, this utility model provides a slicing machine, including a cutting wire 2 and a main roller assembly. The cutting wire 2 is wound around the main roller assembly to form a cutting wire mesh, and the main roller assembly includes at least one main roller 1 provided in the first aspect.

[0059] Reference Figure 4 The main roller assembly may include two main rollers 1 provided in the first aspect. Each main roller 1 has pre-cut sections 11 at both ends and a cutting section 12 in the middle. The two main rollers 1 are arranged in parallel, and cutting lines 2 are wound between the two main rollers 1 to form a network of parallel cutting lines. The area corresponding to the cutting section 12 of the two main rollers 1 constitutes the cutting area for slicing the silicon rod.

[0060] Reference Figure 5 The main roller assembly may include one main roller 1 and two conventional main rollers 3. The entire area of ​​the main roller 1 involved in winding is provided with a first groove 14 and a second groove 15. The distance between adjacent first grooves 14 and second grooves 15 on the main roller 1 is equal to the distance between two adjacent grooves on the conventional main roller 3.

[0061] Since the main roller assembly in the slicer includes the aforementioned main roller 1, it also possesses the beneficial effects of the aforementioned main roller 1, which will not be elaborated here.

[0062] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0063] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A main roller, characterized in that, The main roller has multiple groups of grooves arranged sequentially along the axial direction, and the group of grooves includes adjacent first grooves and second grooves. The first groove and the second groove each have two sidewalls that are arranged opposite each other and have different inclination angles. The inclination angle of the sidewall refers to the angle between the sidewall and the direction perpendicular to the axial direction of the main roller. In the adjacent first and second slots, the inclination angle of one sidewall is similar to that of the adjacent sidewall of the other slot, and the inclination directions of the two adjacent sidewalls are opposite.

2. The main roller according to claim 1, characterized in that, The inclination angles of the two sidewalls in the first groove are a first angle and a second angle, respectively. The first angle is greater than or equal to 40 degrees and less than or equal to 45 degrees, and the second angle is greater than or equal to 0 degrees and less than or equal to 13 degrees. The inclination angles of the two sidewalls in the second groove are the third angle and the fourth angle, respectively. The third angle is greater than or equal to 40 degrees and less than or equal to 45 degrees, and the fourth angle is greater than or equal to 0 degrees and less than or equal to 13 degrees.

3. The main roller according to claim 1 or 2, characterized in that, The main roller includes a cutting section and a pre-cutting section. The pre-cutting section is disposed at at least one end of the main roller, and the first groove and the second groove are formed on the pre-cutting section.

4. The main roller according to claim 3, characterized in that, The main roller includes a main roller body composed of the cutting section and at least one pre-cut section; The ratio of the length of the pre-cut section along the axial direction of the main roller to the length of the main roller body along the axial direction of the main roller is greater than or equal to 0.025 and less than or equal to 0.

1.

5. The main roller according to claim 3, characterized in that, Along the axial direction of the main roller, the cutting section has a plurality of intermediate grooves, and the distance between adjacent first grooves and second grooves in the pre-cutting section is greater than or equal to the distance between two adjacent intermediate grooves in the cutting section.

6. The main roller according to claim 5, characterized in that, The adjacent first and second slots are arranged symmetrically with respect to their center lines.

7. The main roller according to claim 6, characterized in that, Along the axial direction of the main roller, the width of the first groove is less than or equal to the width of the intermediate groove.

8. The main roller according to claim 1 or 2, characterized in that, The first groove and the second groove each have a groove bottom that connects the two side walls, and the groove bottom is arc-shaped.

9. The main roller according to claim 8, characterized in that, The ratio of the depth of the bottom of the first groove to the depth of the first groove is greater than or equal to 0.15 and less than or equal to 0.

2. The ratio of the depth of the bottom of the second groove to the depth of the second groove is greater than or equal to 0.15 and less than or equal to 0.

2.

10. The main roller according to claim 1 or 2, characterized in that, In adjacent first and second slots, the difference in the inclination angle between one sidewall and the adjacent sidewall of the other slot is less than or equal to 5 degrees.

11. A slicer, characterized in that, It includes a cutting wire and a main roller assembly, wherein the cutting wire is wound around the main roller assembly to form a cutting wire mesh, and the main roller assembly includes at least one main roller as described in any one of claims 1 to 10.

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