Cutting machine
By designing wire grooves of different depths on the driving wheel and driven wheel of the cutter machine, the wire saws are layered during cutting, which solves the problem of easy collision and entanglement of wire saws in traditional cutter machines, improves service life and reduces material waste.
Patent Information
- Application Number
- CN202420698928.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In traditional segmentation machines, ring-type diamond wire saws are cut in parallel, causing the wire saws to be too close and easily collide and entangle, reducing their service life. At the same time, the sample sheet is thicker, which wastes materials.
A cut-off machine is designed, by opening an annular and parallel first conductor grooves and second conductor grooves on the driving wheel and the first driven wheel, the opening depths of the first conductor grooves and the second conductor grooves are different, so that the first wire saw and the second wire saw have a height difference in the radial direction, thereby creating layers during cutting to avoid collision and entanglement.
It effectively improves the service life of the wire saw, reduces the thickness of the sample sheet, and avoids waste of materials.
Smart Images
Figure CN222792470U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of CZ single crystal silicon rod segmenting machines, in particular to a segmenting machine. Background Art
[0002] When testing the performance parameters of single crystal silicon rods by straight-pull, a cutting machine is needed to slice the single crystal silicon rods for testing. However, the traditional cutting machine uses a parallel double-slot wire wheel. Since the two ring-shaped diamond wire saws are cutting in parallel, the two ring-shaped diamond wire saws are too close to each other and are prone to collision and entanglement, which reduces the service life of the wire saws.
[0003] In order to prevent the two circular diamond wire saws from being too close to each other and causing collision and entanglement, the two circular diamond wire saws need to be separated by a certain distance, resulting in a larger sample thickness, wasting materials, and making it difficult to reduce the sampling thickness of the silicon wafer. Utility Model Content
[0004] In view of this, the utility model provides a cutting machine, which can effectively solve the problem of collision and entanglement of wire saws when the distance between them is close, thereby increasing the service life of the wire saws. At the same time, it can shorten the distance between the wire saws, reduce the thickness of the sample, and avoid material waste.
[0005] In order to solve at least one of the above technical problems, the utility model adopts the following technical solutions:
[0006] The cutting machine according to the embodiment of the utility model comprises:
[0007] A driving wheel, a first driven wheel, a second driven wheel, a third driven wheel, a first wire saw and a second wire saw;
[0008] Among them, the driving wheel and the first driven wheel are respectively provided with annular and mutually parallel first and second wire grooves along their outer circumferential direction, the first wire saw is sequentially wound around the first wire groove of the driving wheel, the second driven wheel, and the first wire groove of the first driven wheel, the second wire saw is sequentially wound around the second wire groove of the driving wheel, the third driven wheel, and the second wire groove of the first driven wheel, the first wire groove and the second wire groove are opened to different depths so that the first wire saw in the first wire groove and the second wire saw in the second wire groove have a height difference in the radial direction.
[0009] Furthermore, the bottoms of the cross sections of the first wire groove and the second wire groove are V-shaped, and the included angles of the V-shapes are equal.
[0010] Further, the depth of the first wire groove is smaller than the depth of the second wire groove.
[0011] Furthermore, the cross-sections of the first wire saw and the second wire saw are circular, the diameters of the first wire saw and the second wire saw are equal, the diameters of the first wire saw and the second wire saw are 0.38-0.42 mm, and the height difference in the radial direction between the central axis of the first wire saw in the first wire groove and the central axis of the second wire saw in the second wire groove is 2-3 mm.
[0012] Further, a distance between a center plane of the first wire groove in the axial direction and a center plane of the second wire groove in the axial direction is 1.5-2 mm.
[0013] Furthermore, the first wire groove has a depth of 2-3 mm and a groove width of 1-2 mm;
[0014] The second wire groove has a depth of 4-5 mm and a groove width of 1-2 mm.
[0015] Furthermore, at least the outermost layers of the driving wheel and the first driven wheel along the radial direction thereof are made of a polyurethane material layer.
[0016] Further, the number of the second driven wheel and the number of the third driven wheel are both two;
[0017] The first wire saw is sequentially wound around the first wire groove of the driving wheel, the two third driven wheels and the first wire groove of the first driven wheel, and the second wire saw is sequentially wound around the second wire groove of the driving wheel, the two third driven wheels and the second wire groove of the first driven wheel;
[0018] The driving wheel and the first driven wheel are arranged in a row in a first direction, one of the second driven wheels and one of the third driven wheels are arranged in a row in a second direction parallel to the first direction, another of the second driven wheels and another of the third driven wheels are arranged in a row in a third direction parallel to the first direction, wherein the second direction is located between the first direction and the third direction, the second driven wheels arranged in the second direction and the third driven wheels arranged in the third direction are located on a side close to the first driven wheel, and the third driven wheels arranged in the second direction and the second driven wheels arranged in the third direction are located on a side close to the driving wheel.
[0019] Further, the driving wheel and the third driven wheel and the second driven wheel located on one side thereof are aligned with each other and arranged in a row in a fourth direction perpendicular to the first direction, and in the fourth direction, the third driven wheel is located between the driving wheel and the second driven wheel;
[0020] The first driven wheel and the second driven wheel and the third driven wheel located close to one side thereof are aligned with each other and arranged in a row in a fifth direction perpendicular to the first direction. In the fifth direction, the second driven wheel is located between the first driven wheel and the third driven wheel, and the fifth direction is parallel to the fourth direction.
[0021] Further, the driving wheel and the third driven wheel and the second driven wheel located near one side thereof are arranged in a first row from top to bottom, and in the first row, the third driven wheel is located between the driving wheel and the second driven wheel and deviates toward the middle of the driving wheel and the first driven wheel;
[0022] The first driven wheel and the second driven wheel and the third driven wheel located on one side thereof are arranged in a second row from top to bottom. In the second row, the second driven wheel is located between the first driven wheel and the third driven wheel and deviates toward the middle of the driving wheel and the first driven wheel.
[0023] The above technical solution of the utility model has at least one of the following beneficial effects:
[0024] According to the cutting machine of the embodiment of the utility model, an annular and mutually parallel first and second wire grooves are respectively opened on the driving wheel and the first driven wheel along the circumferential direction thereof, and the opening depths of the first and second wire grooves are different so that the center planes of the first wire saw accommodated in the first wire groove and the second wire saw accommodated in the second wire groove have a height difference in the axial direction, thereby causing the first wire saw and the second wire saw to generate layers during cutting, thereby effectively solving the problem of easy collision and entanglement of the wire saws when the distance between them is close, thereby increasing the service life of the wire saws.
[0025] In addition, by reducing the axial distance between the first wire groove and the second wire groove on the same wheel, the axial distance between the first wire saw and the second wire saw is reduced, thereby reducing the thickness of the sampling sample when cutting the single crystal silicon rod, thereby reducing unnecessary waste of qualified products. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic diagram of a cutter cutting a single crystal silicon rod according to an embodiment of the utility model;
[0027] Figure 2 Another schematic diagram of a cutter cutting a single crystal silicon rod according to an embodiment of the utility model;
[0028] Figure 3 It is a partial cross-sectional view of the driving wheel or the first driven wheel in the cutting machine according to an embodiment of the utility model.
[0029] Reference numerals: 1. first wire trough; 2. second wire trough;
[0030] 100. driving wheel; 200. first driven wheel; 300. second driven wheel; 400. third driven wheel; 500. first wire saw; 600. second wire saw; 700. single crystal silicon rod. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.
[0032] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.
[0033] The following first describes in detail the cutting machine according to an embodiment of the utility model in conjunction with the accompanying drawings.
[0034] Figure 1 A schematic diagram showing a cutter cutting a single crystal silicon rod 700 according to an embodiment of the utility model is shown.
[0035] Specifically, Figure 1 As shown, the cutting machine according to the embodiment of the utility model may include: a driving wheel 100, a first driven wheel 200, a second driven wheel 300, a third driven wheel 400, a first wire saw 500 and a second wire saw 600.
[0036] Among them, annular and mutually parallel first and second wire grooves 1 and 2 are respectively opened on the driving wheel 100 along the circumferential direction thereof and on the first driven wheel 200 along the circumferential direction thereof, the first wire saw 500 is sequentially wound around the first wire groove 1 of the driving wheel 100, the second driven wheel 300, and the first wire groove 1 of the first driven wheel 200, the second wire saw 600 is sequentially wound around the second wire groove 2 of the driving wheel 100, the third driven wheel 400, and the second wire groove 2 of the first driven wheel 200, the different opening depths of the first wire groove 1 and the second wire groove 2 make the first wire saw 500 in the first wire groove 1 on the driving wheel 100 and the second wire saw 600 in the second wire groove 2 have a height difference in the radial direction, and the different opening depths of the first wire groove 1 and the second wire groove 2 also make the first wire saw 500 in the first wire groove 1 on the first driven wheel 200 and the second wire saw 600 in the second wire groove 2 have a height difference in the radial direction.
[0037] That is, the first wire groove 1 and the second wire groove 2 on the driving wheel 100 are arranged in parallel along the axial direction of the driving wheel 100, the first wire groove 1 and the second wire groove 2 on the first driven wheel 200 are arranged in parallel along the axial direction of the first driven wheel 200, the first wire saw 500 is sequentially wound around the first wire groove 1 of the driving wheel 100, the second driven wheel 300 and the first wire groove 1 of the first driven wheel 200, the second wire saw 600 is sequentially wound around the second wire groove 2 of the driving wheel 100, the third driven wheel 400 and the second wire groove 2 of the first driven wheel 200, and the first wire saw 500 in the first wire groove 1 and the second wire saw 600 in the second wire groove 2 on the same wheel have a height difference in the radial direction. As a result, when cutting, the reference wire 500 is used to cut the first wire groove 1 and the second wire groove 2 ... Figure 1 The single crystal silicon rod 700 to be cut approaches the wire saw (i.e., the first wire saw 500 and the second wire saw 600) stretched between the driving wheel 100 and the first driven wheel 200 vertically from bottom to top along the radial direction. When the wire saws on the driving wheel 100 and the first driven wheel 200 come into contact, the wire saws cut the single crystal silicon rod 700. Therefore, the wire saw accommodated in the shallower wire groove first contacts the single crystal silicon rod 700, and the wire saw accommodated in the deeper wire groove contacts the single crystal silicon rod 700 later. Therefore, the two wire saws (the first wire saw 500 and the second wire saw 600) will have a sequence when cutting, thereby avoiding the occurrence of collision and entanglement of the wire saws, thereby effectively improving the service life of the wire saws.
[0038] It should be noted here that the driving wheel 100 and the first driven wheel 200 can adopt two wire cutting guide wheels with exactly the same structure. The distinction here is only based on their specific working mode. Their specific shapes, structures, etc. can be exactly the same. The second driven wheel 300 and the third driven wheel 400 can be one, two or more. The structure, shape, etc. of the second driven wheel 300 and the third driven wheel 400 can also be exactly the same as the driving wheel 100. For example, the second driven wheel 300 and the third driven wheel 400 may have a first wire groove and a second wire groove of different depths. The second driven wheel 300 and the third driven wheel 400 may also adopt a structure different from that of the driving wheel 100. For example, only one wire groove is provided on the second driven wheel 300 and the third driven wheel 400.
[0039] Figure 2 Another schematic diagram showing a cutter cutting a single crystal silicon rod 700 according to an embodiment of the utility model.
[0040] Here, it is also necessary to explain that, since the two wire saws arranged in parallel in the wire grooves of the driving wheel 100 and the first driven wheel 200 are used to cut the single crystal silicon rod 700, the order in which the first wire saw 500 and the second wire saw 600 in the first wire groove 1 and the second wire groove 2 contact the single crystal silicon rod 700 depends on the relative movement direction of the single crystal silicon rod 700 relative to the first wire saw 500 and the second wire saw 600 arranged in parallel in the driving wheel 100 and the first driven wheel 200 during cutting. Figure 2 For example, if the single crystal silicon rod 700 moves from bottom to top and approaches the wire wheel, the wire saw placed in the shallower wire groove should first contact the single crystal silicon rod 700, and the wire saw placed in the deeper wire groove should then contact the single crystal silicon rod 700. The two wire saws will also have a sequence when cutting, thereby avoiding collision and entanglement of the wire saws and effectively increasing the service life of the wire saws.
[0041] Figure 3 A partial cross-sectional view of a driving wheel or a first driven wheel in a cutting machine according to an embodiment of the utility model is shown.
[0042] In some embodiments of the present invention, Figure 3 As shown, the bottom of the cross section of the first wire groove 1 is V-shaped and the angle of the V is a, and the bottom of the cross section of the second wire groove 2 is V-shaped and the angle of the V is b, and a is equal to b. On the one hand, the design of the V-shaped groove can more effectively guide the wire saw to move along a specific path during the cutting process compared with other shapes. On the other hand, the V-shaped groove is simple to make, and the two sides can provide effective support for holding the wire saw, which is low in cost and good in effect.
[0043] In some embodiments of the present invention, Figure 3 As shown, the depth of the first wire groove 1 is less than the depth of the second wire groove 2 .
[0044] That is, the depths of the wire grooves are different, so that the first wire saw 500 in the first wire groove 1 and the second wire saw 600 in the second wire groove 2 on the same wheel have a height difference in the radial direction. In other words, the depth of the first wire groove 1 is less than that of the second wire groove 2, so in the actual cutting process, Figure 1 as well as Figure 2 For example, the first wire saw 500 in the first wire groove 1 cuts first, and the second wire saw 600 in the second wire groove 2 cuts later, thereby effectively avoiding collision and entanglement caused by simultaneous cutting of the wire saws, thereby increasing the service life of the wire saws.
[0045] In addition, the first wire groove 1 and the second wire groove 2 are symmetrically arranged on the driving wheel 100 and the first driven wheel 200, respectively, so that unnecessary vibration caused by uneven cutting distribution can be effectively avoided.
[0046] It should also be noted here that the present application does not limit the number of wire grooves. Three or more annular wire grooves of different depths may be provided in parallel along the outer circumferences of the driving wheel 100 and the first driven wheel 200, respectively. Three or more arc-shaped wire grooves may be arranged in sequence and parallel to each other along the axial directions of the driving wheel 100 and the first driven wheel 200, respectively. The number of wire grooves may be adaptively selected according to the cutting requirements of the workpiece and the size of the wire wheel.
[0047] In some embodiments of the present invention, reference Figure 3 The cross-sections of the first wire saw 500 and the second wire saw 600 are circular, the diameter of the first wire saw 500 is equal to the diameter of the second wire saw 600, the diameters of the first wire saw 500 and the second wire saw 600 are 0.38-0.42 mm, and the height difference d3 in the radial direction between the central axis of the first wire saw 500 in the first wire groove 1 and the central axis of the second wire saw 600 in the second wire groove 2 on the same wheel is 2-3 mm. Thus, the effect is better.
[0048] In some embodiments of the present invention, Figure 3As shown, the distance between the center plane of the first wire groove 1 in the axial direction and the center plane of the second wire groove 2 in the axial direction on the driving wheel 100 is d6, and the distance between the center plane of the first wire groove 1 in the axial direction and the center plane of the second wire groove 2 in the axial direction on the first driven wheel 200 is d6, and d6 is 1.5-2mm. In other words, the first wire groove 1 and the second wire groove 2 on the same wheel are parallel, and the center plane of the first wire groove 1 in the axial direction and the center plane of the second wire groove 2 in the axial direction on the same wheel are also parallel, that is, the distance between the first wire saw 500 and the second wire saw 600 in the axial direction on the same wheel is 1.5-2mm. Therefore, a first wire groove 1 and a second wire groove 2 which are annular, parallel to each other and have different depths are respectively opened in the outer circumferential direction of the driving wheel 100 and the first driven wheel 200, so that the first wire saw 500 accommodated in the first wire groove 1 on the same wheel and the second wire saw 600 accommodated in the second wire groove 2 have a height difference in the radial direction, thereby generating layers during wire saw cutting, reducing collision and entanglement between the wire saws, and reducing the distance between the first wire saw 500 and the second wire saw 600 on the same wheel in the axial direction, thereby reducing the thickness of the sampling specimens when cutting the single crystal silicon rod 700, thereby reducing unnecessary waste of qualified products.
[0049] In some embodiments of the present invention, reference Figure 3 , the depth d1 of the first wire groove 1 is 2-3mm, and the slot width d4 is 1-2mm; the depth d2 of the second wire groove 2 is 4-5mm, and the slot width d5 is 1-2mm. That is, the depth d1 of the first wire groove 1 is 2-3mm, and the slot width is Figure 3 The marked d4 is 1-2 mm; the depth d2 of the second wire groove 2 is 4-5 mm, and the groove width is Figure 3 The marked d5 is 1-2 mm. More specifically, for example, the width of the first wire groove 1 can be 1 mm, and the width of the second wire groove 2 can be 1.8 mm. And the angles of the V-shaped grooves at the bottom of the first wire groove 1 and the second wire groove 2 are the same, that is, a=b. Thus, the depth difference and the axial spacing of the two wire saws respectively clamped in the first wire groove 1 and the second wire groove 2 are further ensured.
[0050] In some embodiments of the utility model, at least the outermost layer of the driving wheel 100 and the first driven wheel 200 along the radial direction thereof is a polyurethane material layer. That is to say, the driving wheel 100 and the first driven wheel 200 can be made of polyurethane as a whole, or only the outermost layer along the radial direction thereof is a polyurethane material layer and the inner layer is other material layers. Among them, the thickness of the polyurethane material layer can be greater than the predetermined depth dimension of the second wire groove 2, for example. Polyurethane has good wear resistance and a low friction coefficient, and the friction between the polyurethane and the wire saw is small during use, which helps to further improve the performance and service life of the wire cutting wire wheel.
[0051] In some embodiments of the present invention, reference Figure 1 to Figure 2 There are two second driven wheels 300 and two third driven wheels 400. The first wire saw 500 is sequentially wound around the first wire groove 1 of the driving wheel 100, the two second driven wheels 300, and the first wire groove 1 of the first driven wheel 200; the second wire saw 600 is sequentially wound around the second wire groove 2 of the driving wheel 100, the two third driven wheels 400, and the second wire groove 2 of the first driven wheel 200. According to some embodiments, the driving wheel 100 and the first driven wheel 200 are arranged in a row in a first direction, one of the second driven wheels 300 and one of the third driven wheels 400 are arranged in a row in a second direction parallel to the first direction, and another second driven wheel 300 and another third driven wheel 400 are arranged in a row in a third direction parallel to the first direction, wherein the second direction is located between the first direction and the third direction, one of the second driven wheels 300 arranged in the second direction and another third driven wheel 400 arranged in the third direction are located on a side close to the first driven wheel 200, and another third driven wheel 400 arranged in the second direction and one of the second driven wheels 300 arranged in the third direction are close to a side of the driving wheel 100, so that the two second driven wheels 300 are arranged crosswise with each other, and the two third driven wheels 400 are arranged crosswise with each other, thereby ensuring that the first wire saw 500 and the second wire saw 600 are located on two parallel and different planes to avoid interference and collision when cutting the single crystal silicon rod 700, thereby extending the service life of the wire saw.
[0052] In some embodiments of the present invention, reference Figure 1The driving wheel 100 and the third driven wheel 400 and the second driven wheel 300 located near one side thereof are aligned with each other and arranged in a row in a fourth direction perpendicular to the first direction. In the fourth direction, the third driven wheel 400 is located between the driving wheel 100 and the second driven wheel 300. The first driven wheel 200 and the second driven wheel 300 and the third driven wheel 400 located near one side thereof are aligned with each other and arranged in a row in a fifth direction perpendicular to the first direction. In the fifth direction, the second driven wheel 300 is located between the first driven wheel 200 and the third driven wheel 400. The fifth direction is parallel to the fourth direction. That is to say, the wire wheels (i.e., the driving wheel 100, the first driven wheel 200, the two second driven wheels 300 and the two third driven wheels 400) are arranged in a row in the fourth direction and the fifth direction, respectively, and in a row in the first direction, the second direction and the third direction, respectively. The neat arrangement avoids entanglement, collision or jitter caused by the different spacings between the wire wheels after the first wire saw 500 and the second wire saw 600 are wound in sequence, thereby improving the stability of their operation.
[0053] In some embodiments of the present invention, reference Figure 2 , the driving wheel 100 and the third driven wheel 400 and the second driven wheel 300 located near one side thereof are arranged in a first row from top to bottom. In the first row, the third driven wheel 400 is located between the driving wheel 100 and the second driven wheel 300 and deviates toward the middle of the driving wheel 100 and the first driven wheel 200; the first driven wheel 200 and the second driven wheel 300 and the third driven wheel 400 located near one side thereof are arranged in a second row from top to bottom. In the second row, the second driven wheel 300 is located between the first driven wheel 200 and the third driven wheel 400 and deviates toward the middle of the driving wheel 100 and the first driven wheel 200. That is to say, the spacing between the second driven wheel 300 and the third driven wheel 400 located in the middle row is smaller than the spacing between the second driven wheel 300 and the third driven wheel 400 located in the uppermost row. In this way, accidents such as entanglement between the wire saws can be further avoided, and their operation stability can be improved.
[0054] Therefore, the first wire saw 500 and the second wire saw 600 realize the wire cutting function through the transmission of the driving wheel 100 and each driven wheel. Since the first wire saw 500 is respectively arranged in the first wire groove 1 of the driving wheel 100 and the first wire groove 1 of the first driven wheel 200, and the second wire saw 600 is respectively arranged in the second wire groove 2 of the driving wheel 100 and the second wire groove 2 of the first driven wheel 200, and since the depth of the second wire groove 2 is deeper than the depth of the first wire groove 1, during this cutting process, the first wire saw 500 and the second wire saw 600 have a sequence to produce cutting layers, thereby effectively avoiding the collision and entanglement caused by the simultaneous cutting of the double-groove wire wheel wire saw of the traditional cutting machine, thereby increasing the service life of the wire saw.
[0055] It should be noted that no matter how deep or shallow the first wire saw 500 or the second wire saw 600 is positioned on the wire groove of each wire wheel, the plane formed by the winding arrangement of the first wire saw 500 is parallel to the plane formed by the winding arrangement of the second wire saw 600, thereby avoiding the problem of interference between the first wire saw 500 and the second wire saw 600 during operation. Figure 1 and Figure 2 Only an example including two second driven wheels 300 and the third driven wheel 400 is given. In fact, there may be more. Those skilled in the art can make appropriate changes based on the above description and common knowledge in the field, which should be understood to fall within the scope of protection of this application.
[0056] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A cutting machine, characterized in that: include: A driving wheel, a first driven wheel, a second driven wheel, a third driven wheel, a first wire saw and a second wire saw; Among them, the driving wheel and the first driven wheel are respectively provided with annular and mutually parallel first and second wire grooves along their outer circumferential direction, the first wire saw is sequentially wound around the first wire groove of the driving wheel, the second driven wheel, and the first wire groove of the first driven wheel, the second wire saw is sequentially wound around the second wire groove of the driving wheel, the third driven wheel, and the second wire groove of the first driven wheel, the first wire groove and the second wire groove are opened to different depths so that the first wire saw in the first wire groove and the second wire saw in the second wire groove have a height difference in the radial direction.
2. The cutting machine according to claim 1, characterized in that: The bottoms of the cross sections of the first wire groove and the second wire groove are V-shaped, and the included angles of the V-shapes are equal.
3. The cutting machine according to claim 2, characterized in that: The depth of the first wire groove is smaller than the depth of the second wire groove.
4. The cutting machine according to claim 3, characterized in that: The cross-sections of the first wire saw and the second wire saw are circular, the diameters of the first wire saw are equal to the diameters of the second wire saw, the diameters of the first wire saw and the second wire saw are 0.38-0.42 mm, and the height difference in the radial direction between the central axis of the first wire saw in the first wire groove and the central axis of the second wire saw in the second wire groove is 2-3 mm.
5. The cutting machine according to claim 4, characterized in that: The distance between the center plane of the first wire groove in the axial direction and the center plane of the second wire groove in the axial direction is 1.5-2 mm.
6. The cutting machine according to claim 5, characterized in that: The first wire groove has a depth of 2-3 mm and a groove width of 1-2 mm; The second wire groove has a depth of 4-5 mm and a groove width of 1-2 mm.
7. The cutting machine according to claim 1, characterized in that: At least the outermost layers of the driving wheel and the first driven wheel along the radial direction thereof are polyurethane material layers.
8. The cutting machine according to claim 1, characterized in that: There are two of each of the second driven wheel and the third driven wheel; The first wire saw is sequentially wound around the first wire groove of the driving wheel, the two third driven wheels and the first wire groove of the first driven wheel, and the second wire saw is sequentially wound around the second wire groove of the driving wheel, the two third driven wheels and the second wire groove of the first driven wheel; The driving wheel and the first driven wheel are arranged in a row in a first direction, one of the second driven wheels and one of the third driven wheels are arranged in a row in a second direction parallel to the first direction, another of the second driven wheels and another of the third driven wheels are arranged in a row in a third direction parallel to the first direction, wherein the second direction is located between the first direction and the third direction, the second driven wheels arranged in the second direction and the third driven wheels arranged in the third direction are located on a side close to the first driven wheel, and the third driven wheels arranged in the second direction and the second driven wheels arranged in the third direction are located on a side close to the driving wheel.
9. The cutting machine according to claim 8, characterized in that: The driving wheel and the third driven wheel and the second driven wheel located on one side thereof are aligned with each other and arranged in a row in a fourth direction perpendicular to the first direction, and in the fourth direction, the third driven wheel is located between the driving wheel and the second driven wheel; The first driven wheel and the second driven wheel and the third driven wheel located close to one side thereof are aligned with each other and arranged in a row in a fifth direction perpendicular to the first direction. In the fifth direction, the second driven wheel is located between the first driven wheel and the third driven wheel, and the fifth direction is parallel to the fourth direction.
10. The cutting machine according to claim 8, characterized in that: The driving wheel and the third driven wheel and the second driven wheel located near one side thereof are arranged in a first row from top to bottom, and in the first row, the third driven wheel is located between the driving wheel and the second driven wheel and deviates toward the middle of the driving wheel and the first driven wheel; The first driven wheel and the second driven wheel and the third driven wheel located on one side thereof are arranged in a second row from top to bottom. In the second row, the second driven wheel is located between the first driven wheel and the third driven wheel and deviates toward the middle of the driving wheel and the first driven wheel.