Cutting mechanism and wire cutting machine comprising same

Abstract

The utility model relates to the technical field of wire cutting, particularly provides a cutting mechanism and a wire cutting machine comprising the same, and aims to reduce waste of cutting wires to a certain extent. In order to achieve the purpose, the cutting mechanism comprises a cutting main roller on which a cutting line can be wound; at least one auxiliary wheel assembly including: at least two auxiliary wheels disposed on the cutting main roller so as to introduce at least a portion of a cutting line into a local area of the cutting main roller from an upstream side of the cutting main roller via the auxiliary wheel assembly; and / or at least one part of the cutting line is guided into the downstream side of the cutting main roller from the local area of the cutting main roller through the auxiliary wheel assembly. By means of the structure, a part of cutting lines (broken lines) are abandoned or lines are arranged in the local area of the cutting main roller (the length of the workpiece to be machined is short), and the phenomenon of poor cutting is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting, and specifically provides a cutting mechanism and a wire cutting machine comprising the same. Background Art

[0002] Wire cutting machine is a kind of equipment which uses cutting wire (such as diamond wire, etc., with tiny diamond particles embedded on the surface of the diamond wire) to perform cutting operations such as truncation, squaring and slicing on hard and brittle materials to be processed (such as photovoltaic silicon materials (including single crystal silicon rods, polycrystalline silicon ingots, etc.), sapphire, magnetic materials, etc.).

[0003] Taking the slicer that slices photovoltaic silicon rods (referred to as silicon rods) with a wire cutter as an example, the slicer directly operates the workpiece through a cutting mechanism. For example, under normal circumstances, the wire cutter mainly includes three cutting main rollers (two on the top and one on the bottom) distributed in an inverted triangle shape. The cutting main rollers are processed with dense annular grooves. By densely winding the diamond wire at the position corresponding to the annular groove, a continuous cutting wire network can be formed. Based on this, through the reciprocating motion of the diamond wire between the cutting mechanism and other structures of the wire cutter such as the retractable wire roller, the diamond wire located between the two upper cutting main rollers can cut the workpiece.

[0004] When the wire breaks during cutting, the conventional solution is to reconnect the wire at the broken position and continue cutting. However, during the high-speed reciprocating motion of the cutting wire, the position of the joint will inevitably produce wire marks, scratches and other problems, resulting in reduced cutting quality; and / or

[0005] When the length of the workpiece to be processed is short, when the cutting main roller is covered with wire mesh, tension fluctuations will easily occur because a part of the wire mesh is not involved in the cutting operation, which will inevitably affect the cutting quality of the slicer and even cause the risk of diamond wire breakage.

[0006] Therefore, this field needs a new technical solution to solve the above technical problems. Utility Model Content

[0007] The utility model aims to at least partially solve the above technical problems, specifically, to solve the technical problem of how to avoid wire breakage at a certain point on the wire and / or reduction in cutting quality when the length of the workpiece to be processed is short.

[0008] In a first aspect, the utility model provides a cutting mechanism, which includes: a cutting main roller, on which a cutting line can be wound; at least one auxiliary wheel assembly, which includes: at least two auxiliary wheels, which are arranged on the cutting main roller, so as to: introduce at least a portion of the cutting line from the upstream side of the cutting main roller into a local area of ​​the cutting main roller via the auxiliary wheel assembly; and / or introduce at least a portion of the cutting line from the local area of ​​the cutting main roller into the downstream side of the cutting main roller via the auxiliary wheel assembly.

[0009] With such a configuration, it is possible to effectively reduce the waste of cutting wire while ensuring the cutting quality.

[0010] Specifically, in the event of a wire break somewhere in the wire mesh, the wire break is used as a dividing point, and a portion of the cutting wire is discarded while the other portions that are still within the service life cycle are retained, thereby cutting the workpiece to be processed (for example, a silicon rod) in sections. Specifically, the discarded cutting wire is removed from the main cutting roller and the pay-off and take-up roller, and the retained cutting wire is led out from the joint of the broken wire, and is wound around the pay-off and take-up roller through the auxiliary wheel assembly to continue cutting a portion of the silicon rod (such as the front half). After this portion is cut, the wire mesh of another portion (such as the back half) is re-laid, and then the back half is cut in a similar manner, so that the influence of the wiring head on the cutting quality can be effectively reduced. In the case of a short length of the workpiece to be processed, the cutting quality is ensured and the waste of cutting wire caused by wire breakage is effectively avoided by wiring in a local area of ​​the main cutting roller.

[0011] It is understandable that those skilled in the art can flexibly adjust the number of auxiliary wheel assemblies, the location of the auxiliary wheel assemblies, the number of auxiliary wheels contained therein, and the relative positions of the auxiliary wheels according to actual needs. Exemplarily, the auxiliary wheel assemblies include two, one of which includes two auxiliary wheels, and the other includes three auxiliary wheels.

[0012] For the above-mentioned cutting mechanism, in a possible implementation manner, the main cutting roller includes a first portion and a second portion along its axial direction, and the cutting mechanism is provided with the auxiliary wheel assembly at a position corresponding to the first portion and / or the second portion.

[0013] Through such a configuration, a possible configuration mode of the auxiliary wheel assembly on the cutting mechanism is provided.

[0014] Exemplarily, when the cutting mechanism is provided with an auxiliary wheel assembly at a position corresponding to the first part, the cutting wheel assembly can be used to skip the cutting line corresponding to the first part, thereby abandoning this part of the cutting line and continuing the cutting operation of the workpiece only by winding the cutting line to the second part.

[0015] Similarly, when the cutting mechanism is provided with an auxiliary wheel assembly at a position corresponding to the second part, the cutting wheel assembly can be used to skip the cutting line corresponding to the second part, thereby abandoning this part of the cutting line and continuing to complete the cutting operation of the workpiece only by winding the cutting line to the first part.

[0016] For the above-mentioned cutting mechanism, in a possible implementation manner, the auxiliary wheel assembly includes a mounting component, and the auxiliary wheel is movably disposed on the mounting component.

[0017] This configuration provides a possible structural form of the training wheel assembly.

[0018] It is understandable that those skilled in the art can determine the structural form, number, and distribution form of the plurality of auxiliary wheels on the mounting component according to actual needs. In addition, those skilled in the art can determine the movable modes (types) of the auxiliary wheels on the mounting component and the specific structures used to achieve the corresponding activities according to actual needs.

[0019] For the above-mentioned cutting mechanism, in a possible implementation manner, the auxiliary wheel is rotatably and / or slidably disposed on the mounting component.

[0020] Through such a composition, a possible form of activity is given.

[0021] It is understandable that those skilled in the art can determine the specific structure used for rotation / sliding, the direction and range of rotation / sliding on the mounting component, etc. according to actual needs. For example, the structures used for rotation and sliding can be relatively independent or related. For example, rotation and sliding are respectively realized by two relatively independent structures.

[0022] Taking rotation as an example, the structure for realizing it may be: a rotating arm is provided on the mounting component and one end of the rotating arm is pivotally connected to the mounting component, and the auxiliary wheel is fixed to the other end of the rotating arm.

[0023] For the above-mentioned cutting mechanism, in a possible embodiment, the auxiliary wheel assembly includes: a transfer rod, the transfer rod is pivotally arranged on the mounting component, and the auxiliary wheel is arranged on the transfer rod; and / or a slider, which can slide along the mounting component, and the auxiliary wheel is arranged on the slider.

[0024] Through such a configuration, a specific structural form for realizing rotation / sliding activity is provided.

[0025] For the above-mentioned cutting mechanism, in a possible implementation manner, the transfer rod is pivotally disposed on the sliding block.

[0026] Through such a configuration, a possible connection form between the slide block and the transfer rod is provided.

[0027] It is understandable that those skilled in the art can determine the pivotal connection method between the two according to actual needs, such as the two can be directly pivotally connected, or indirectly transferred by introducing additional structures.

[0028] For the above-mentioned cutting mechanism, in a possible implementation manner, a connecting portion is provided on the sliding block in a fixed connection or integrally formed manner, and the transfer rod is pivotally provided on the connecting portion.

[0029] Through such a structure, a specific form of realizing the connection between the slider and the transfer rod is provided.

[0030] It is understandable that those skilled in the art can determine the structural form, number and relative position of the connecting part with the slider and the transfer rod according to actual needs. For example, the connecting part can be used as a mounting carrier, and the slider and the transfer rod are both arranged on it; the slider is used as a mounting carrier, and a connecting part is added to a part of it, and the slider is arranged on it.

[0031] For the above-mentioned cutting mechanism, in a possible implementation manner, a connecting hole is provided on the connecting portion, and the transfer rod is provided on the connecting portion by means of a connecting structure that can rotate in the connecting hole.

[0032] Through such a structure, a specific structural form for realizing rotation is provided, for example, the connecting structure may be a pin shaft or the like.

[0033] For the above-mentioned cutting mechanism, in a possible implementation manner, at least one avoidance hole is provided on the connecting portion so that: after the auxiliary wheel is rotated into position relative to the connecting portion, the auxiliary wheel can be fixed to the transfer rod with the aid of a fastener, and during the rotation of the auxiliary wheel relative to the connecting portion, the fastener is allowed to move without interference in the avoidance hole at the corresponding position.

[0034] Through such a configuration, a specific structural form of the transfer rod is provided. For example, the fastener may be a pin, a screw, etc. For example, the avoidance hole may be an arc-shaped hole or a waist hole with a larger width, etc. Exemplarily, the avoidance hole is an arc-shaped hole and includes a plurality of them.

[0035] For the above-mentioned cutting mechanism, in a possible implementation manner, the mounting component includes a guide rod, and the sliding block is slidably disposed on the guide rod.

[0036] Through such a configuration, a specific structural form of the installation component is provided.

[0037] For the above-mentioned cutting mechanism, in a possible implementation manner, the guide rod has a cross section capable of preventing the sliding block from escaping in the radial direction.

[0038] With such a configuration, it is possible to ensure the reliability of the sliding connection in the radial direction.

[0039] It can be connected that those skilled in the art can determine the specific form of the cross section according to actual needs, such as an inverted triangle, an inverted trapezoid or other regular / irregular structures.

[0040] For the above-mentioned cutting mechanism, in a possible implementation manner, the guide rod has a limiting structure capable of preventing the sliding block from axially escaping.

[0041] With such a configuration, it is possible to ensure the reliability of the sliding connection in the axial direction.

[0042] It can be connected that those skilled in the art can determine the specific form of the limiting structure according to actual needs, such as a stopper, a baffle or a buffer pad.

[0043] In a second aspect, the utility model provides a wire cutting machine, which comprises the cutting mechanism described in any one of the above items.

[0044] It can be understood that the wire cutting machine has all the technical effects of the cutting mechanism described in any of the above items, which will not be repeated here.

[0045] For the above-mentioned wire cutting machine, in a possible implementation manner, the wire cutting machine includes a tension wheel, and the auxiliary wheel assembly is arranged between the main cutting roller and the tension wheel.

[0046] Through such a structure, a specific arrangement position of the cutting mechanism on the wire cutting machine is given.

[0047] For the above-mentioned wire cutting machine, in a possible implementation manner, the wire cutting machine includes a frame, and the mounting component of the cutting mechanism is arranged on the frame.

[0048] Through such a structure, a specific setting method of the cutting mechanism on the wire cutting machine is provided.

[0049] For the above-mentioned wire cutting machine, in a possible implementation manner, at least one mounting structure is provided on the frame in an integrally formed or fixedly connected manner, and the mounting component is fixedly connected to the frame by means of the mounting structure.

[0050] Through such a structure, a specific form of a wire cutting machine consisting of a cutting mechanism is provided.

[0051] For the above-mentioned wire cutting machine, in a possible implementation manner, the wire cutting machine is a slicer.

[0052] Through such a structure, a specific structural form of the wire cutting machine is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The following takes the workpiece to be processed as a silicon rod to be cut (hereinafter referred to as silicon rod) and the wire cutting machine as a slicer as an example, and describes the preferred embodiment of the utility model with reference to the accompanying drawings, in which:

[0054] Figure 1 The structure diagram of a slicer according to an embodiment of the utility model is shown as follows Figure 1 (The main cutting roller assembly is shown, and the auxiliary wheel assembly is not shown);

[0055] Figure 2 A schematic diagram showing the structure of a slicer according to an embodiment of the utility model Figure 2 (Auxiliary wheel assembly is shown, main cutting roller assembly is not shown);

[0056] Figure 3 A schematic structural diagram showing an auxiliary wheel assembly of a slicer according to an embodiment of the utility model;

[0057] Figure 4 A schematic diagram showing a first state of an auxiliary wheel assembly of a slicer according to an embodiment of the utility model; and

[0058] Figure 5 A schematic diagram showing a first state of an auxiliary wheel assembly of a slicer according to an embodiment of the utility model is shown.

[0059] List of reference numerals:

[0060] 100. Slicer;

[0061] 1. Framework;

[0062] 21. First wire-retracting and -releasing mechanism; 22. Second wire-retracting and -releasing mechanism;

[0063] 3. Cutting mechanism;

[0064] 31. First cutting main roller; 32. Second cutting main roller; 33. Third cutting main roller;

[0065] 331, Part I; 332, Part II;

[0066] 41. first tension wheel; 42. second tension wheel;

[0067] 5. Silicon rod;

[0068] 6. Training wheel assembly;

[0069] 61. first auxiliary wheel; 62. second auxiliary wheel; 63. mounting component;

[0070] 631, guide rod; 632, slider; 633, connecting part; 634, transfer rod;

[0071] 6351, connecting hole; 6352, pin;

[0072] 6361, first arc-shaped hole; 6362, second arc-shaped hole;

[0073] 6371, first stopper; 6372, second stopper;

[0074] 6381, first bracket; 6382, second bracket;

[0075] 7. Wire network. DETAILED DESCRIPTION

[0076] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the present embodiment is introduced in combination with an auxiliary wheel assembly including two auxiliary wheels respectively arranged on the left and right sides of the cutting area, this is not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the number of auxiliary wheel assemblies and the number of auxiliary wheels contained in each auxiliary wheel assembly. In addition, although the present embodiment is introduced in combination with a wire cutting machine having an axially movable first / second wire retracting and releasing mechanism, this is not intended to limit the scope of protection of the present invention. Obviously, the cutting mechanism of the present invention is also suitable for a traditional wire cutting machine with a six-guide wheel structure.

[0077] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0078] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" 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 direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In addition, in order to better illustrate the present invention, many specific details are given in the following specific embodiments, and those skilled in the art should understand that the present invention can also be implemented without certain specific details. In some examples, the principle of the slicer well known to those skilled in the art is not described in detail in order to highlight the main purpose of the present invention.

[0080] The equipment forms of wire cutting machines mainly include cutters, squarers and slicers. Taking the workpiece to be processed as silicon rods as an example, the cutter is mainly used to cut the longer silicon rods into shorter silicon rods. Specifically, a silicon rod is cut into multiple sections by cutting along the radial direction of the silicon rod. The squarer is mainly used to cut a silicon rod with a circular cross section (such as a round rod) into a silicon rod with a rectangular cross section (such as a square) (such as a square rod). Specifically, the edge of the round rod is removed by cutting along the axial direction of the silicon rod to cut the round rod into a square rod. The slicer is mainly used to cut the square rod that meets the precision standard intensively and continuously along its radial direction by multi-wire cutting to obtain the thin slices to be used. Under normal circumstances, the precision standard is ensured by grinding the edges / sides of the square rod. The utility model is mainly improved for the slicer with a wire mesh.

[0081] Main reference Figure 1 and Figure 2In a possible embodiment, the slicer 100 includes a frame 1, wherein the frame is provided with a first pay-off and retracting mechanism 21 and a second pay-off and retracting mechanism 22 on the left and right sides respectively, the main structure of the first / second pay-off and retracting mechanism is a winding roller, and the diamond wire as a cutting wire can realize the pay-off and retracting function (the pay-off and retracting functions can be interchanged). The frame is provided with a cutting mechanism 3 in the cutting area corresponding to the slicer, such as in this example, the cutting mechanism includes a first cutting main roller 31, a second cutting main roller 32 and a third cutting main roller 33 distributed in an inverted triangle, wherein the cutting main rollers (31, 32) are located above the third cutting main roller 33. A first tension wheel 41 and a second tension wheel 42 are respectively provided between the third cutting main roller 33 and the first pay-off and retracting mechanism 21 and the second pay-off and retracting mechanism 22, and the pay-off and retracting rollers of the two pay-off and retracting mechanisms are lower than the tension wheels on the same side. In this way, through the reciprocating motion of the diamond wire between the two pay-off and retracting rollers, the tension wheels on the corresponding sides and the cutting mechanism, the silicon rod can be cut along its radial direction to obtain a silicon wafer. Specifically, the diamond wire wound by the pay-off and take-up roller in the "release" function is guided to the main roller mechanism composed of the cutting main rollers (31, 32, 33) through the tension wheel on the corresponding side, and then guided to the pay-off and take-up roller in the "retract" function through another tension wheel, and the pay-off and take-up rollers on both sides perform retracting and pay-off alternately. Based on this, the silicon rod 5 moving downward can be cut by the diamond wire between the cutting main rollers (31, 32) located above. In the utility model, auxiliary wheel assemblies 6 are respectively provided between the tension wheels on the left and right sides of the cutting area and the corresponding sides, and the auxiliary wheel assembly and the cutting main roller assembly constitute the cutting mechanism of the utility model. For example, when the first pay-off and take-up mechanism 21 on the left side pays off the wire and the second pay-off and take-up mechanism 21 on the right side retracts the wire, for the auxiliary wheel assembly 6 on the left side, the first pay-off and take-up mechanism 21 is on the upstream side of the auxiliary wheel assembly 6, that is, when observed in the pay-off direction, the first pay-off and take-up mechanism 21 is on the upstream side of the auxiliary wheel assembly 6. Similarly, when the first retractable-wire mechanism 21 on the left side is reeling in the wire and the second retractable-wire mechanism 21 on the right side is releasing the wire, for the auxiliary wheel assembly 6 on the left side, the first retractable-wire mechanism 21 is located on the downstream side of the auxiliary wheel assembly 6, that is, when observed in the line releasing direction, the first retractable-wire mechanism 21 is on the downstream side of the auxiliary wheel assembly 6.

[0082] Main reference Figure 3 In a possible implementation, the auxiliary wheel assembly 6 mainly includes a first auxiliary wheel 61, a second auxiliary wheel 62 and a mounting component 63, and the (first and second) auxiliary wheels are both slidably and rotatably arranged on the mounting component 63. In this example, the sliding / rotating connection method of the (first and second) auxiliary wheels with the mounting part is roughly the same, and the first auxiliary wheel is used as an example for explanation below. Obviously, the sliding / rotating connection method of the two with the mounting part can also be different.

[0083] In a possible implementation, the mounting component 63 includes a guide rod 631, on which a slider 632 capable of sliding along the guide rod is disposed, on which a connecting portion 633 is disposed, and on which a transfer rod 634 is disposed, which can rotate relative to the connecting portion and be connected to the first auxiliary wheel 61.

[0084] In a possible embodiment, the rotation connection is realized as follows: a connection hole 6351 is provided on the connection part, and a pin 6352 capable of rotating therein is provided in the connection hole. Two arc-shaped holes (respectively referred to as the first arc-shaped hole 6361 and the second arc-shaped hole 6362) are provided from bottom to top above the connection hole, so that the rotation of the first auxiliary wheel can be realized by the rotation of the pin in the connection hole. After the first auxiliary wheel is adjusted to a suitable position tangent to the diamond wire, the first auxiliary wheel can be reliably fixed to the mounting component by tightening fasteners such as screws in the (first and second) arc-shaped holes. Among them, the auxiliary wheel can rotate freely around its own axis using the bearing.

[0085] In a possible implementation, the guide rod 631 has an inverted trapezoidal cross section, thereby effectively preventing the slider from falling out in the radial direction during sliding, thereby ensuring the reliability of the auxiliary wheel assembly.

[0086] In a possible implementation, a first stopper 6371 and a second stopper 6372 are respectively provided at both ends of the guide rod 631, and the maximum sliding range of the (first and second) auxiliary wheels is limited by the two baffles, thereby effectively preventing the slider from axially escaping.

[0087] In a possible implementation, the guide rod 631 is respectively provided with a first bracket 6381 and a second bracket 6382 of an L-shaped structure as mounting structures near both ends, and the guide rod is fixed to the frame through the two brackets.

[0088] Based on the above structure, the following mainly refers to Figure 4 and Figure 5 To describe the working principle of the utility model. For the sake of convenience, it is assumed that Figure 4 and Figure 5 The winding roller at the lower left in the figure is the pay-off roller and the winding roller at the upper right is the take-up roller.

[0089] like Figure 4As shown, when the slicer is in normal cutting, the auxiliary wheel assembly is in a non-working state. In this state, the routing of the diamond wire is as follows: the diamond wire starts from the pay-off roller of the first pay-off and take-up device on the left, enters the cutting area after passing through the first tension wheel, is wound on the cutting main roller assembly composed of the (first, second, and third) cutting main rollers to form a wire net 7, and then passes through the second tension wheel on the right and is wound on the take-up roller of the first pay-off and take-up device. When the take-up and take-up functions of the winding rollers are interchanged, the routing order of the diamond wire is reversed, which will not be repeated here.

[0090] like Figure 5 As shown, when the length of the wire net needs to be shortened due to the breakage of the diamond wire or the short length of the silicon rod, in this example, the wire is routed only in the second part 332 located on the right side without routing in the first part 331 located on the left side, and the axial spacing between the two auxiliary wheels is increased by sliding the (first and second) auxiliary wheels on the guide rod. At this time, the routing method of the diamond wire is: the diamond wire starts from the pay-off roller of the first take-up and pay-off device on the left side, enters the cutting area after passing through the first tension wheel, and is wound on the cutting main roller assembly composed of the (first, second, and third) cutting main rollers to form a wire net on the right side of the cutting main roller assembly, and then is wound on the take-up roller of the first take-up and pay-off device through the second tension wheel on the right side. That is: the position where the diamond wire is wound into the cutting main roller assembly is changed through the intervention of the auxiliary wheel assembly, thereby controlling the length of the wire net. Similarly, when the take-up and pay-off functions of the winding rollers are interchanged, the routing order of the diamond wire is reversed, which will not be repeated here.

[0091] It can be seen that in the slicer of the present invention, when a wire break occurs somewhere in the entire wire net on the cutting main roller assembly and the section of diamond wire needs to be discarded, or when the length of the wire net needs to be shortened due to the need to cut a shorter length of silicon rods, the winding position of the diamond wire can be adjusted by intervention of two auxiliary wheel assemblies installed on the left and right sides of the cutting area of ​​the slicer, thereby effectively shortening the length of the wire net.

[0092] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A cutting mechanism, characterized in that: The cutting mechanism comprises: A main cutting roller on which a cutting wire can be wound; At least one training wheel assembly comprising: At least two auxiliary wheels are arranged on the cutting main roller so as to: Directing at least a portion of the cutting line from the upstream side of the main cutting roller via the auxiliary wheel assembly into a local area of ​​the main cutting roller; and / or At least a portion of the cutting line is guided from a local area of ​​the main cutting roller to a downstream side of the main cutting roller via the auxiliary wheel assembly.

2. The cutting mechanism according to claim 1, characterized in that: The main cutting roller includes a first portion and a second portion along its axial direction. The cutting mechanism is provided with the auxiliary wheel assembly at a position corresponding to the first portion and / or the second portion.

3. The cutting mechanism according to claim 1 or 2, characterized in that: The auxiliary wheel assembly comprises a mounting component, and the auxiliary wheel is movably arranged on the mounting component.

4. The cutting mechanism according to claim 3, characterized in that: The auxiliary wheel is rotatably and / or slidably arranged on the mounting component.

5. The cutting mechanism according to claim 4, characterized in that: The auxiliary wheel assembly comprises: A transfer rod, the transfer rod is pivotally arranged on the mounting component, and the auxiliary wheel is arranged on the transfer rod; and / or The slider can slide along the mounting component, and the auxiliary wheel is arranged on the slider.

6. The cutting mechanism according to claim 5, characterized in that: The transfer rod is pivotally arranged on the sliding block.

7. The cutting mechanism according to claim 6, characterized in that: The sliding block is provided with a connecting portion in a fixed connection or integrally formed manner, and the transfer rod is pivotally provided on the connecting portion.

8. The cutting mechanism according to claim 7, characterized in that: The connecting part is provided with a connecting hole, and the transfer rod is arranged on the connecting part by means of a connecting structure which can rotate in the connecting hole.

9. The cutting mechanism according to claim 8, characterized in that: At least one avoidance hole is provided on the connecting portion so as to: After the auxiliary wheel is rotated into position relative to the connecting part, the auxiliary wheel can be fixed to the transfer rod by means of a fastener, and During the rotation of the auxiliary wheel relative to the connecting part, the fastener is allowed to move in the avoidance hole at the corresponding position without interference.

10. The cutting mechanism according to claim 5, characterized in that: The mounting component comprises a guide rod, and the sliding block is slidably arranged on the guide rod.

11. The cutting mechanism according to claim 10, characterized in that: The guide rod has a cross section capable of preventing the slider from escaping in the radial direction.

12. The cutting mechanism according to claim 10, characterized in that: The guide rod has a limiting structure capable of preventing the sliding block from escaping in the axial direction.

13. A wire cutting machine, characterized in that: The wire cutting machine comprises the cutting mechanism according to any one of claims 1 to 12.

14. The wire cutting machine according to claim 13, characterized in that: The wire cutting machine comprises a tension wheel, and the auxiliary wheel assembly is arranged between the main cutting roller and the tension wheel.

15. The wire cutting machine according to claim 14, characterized in that: The wire cutting machine comprises a frame, and the mounting components of the cutting mechanism are arranged on the frame.

16. The wire cutting machine according to claim 15, characterized in that: At least one mounting structure is provided on the frame in an integrally formed or fixedly connected manner, and the mounting component is fixedly connected to the frame by means of the mounting structure.

17. The wire cutting machine according to claim 13, characterized in that: The wire cutting machine is a slicer.

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