Multi-wire cutting equipment and an automatic groove-changing mechanism applied to the multi-wire cutting equipment

Abstract

The present application discloses a multi-wire cutting device and an automatic slot changing mechanism used in the multi-wire cutting device, comprising: a cutting wheel, comprising a first slot and a second slot for winding the cutting wire; a slot changing cylinder, linked with the cutting wheel, comprising a cylinder body, and a first guide rail and a second guide rail connected to each other and provided on the cylinder body, wherein the height difference between the first guide rail and the second guide rail corresponds to the slot distance between the first slot and the second slot; a positioning member, which can be relatively slidably arranged in the first guide rail or the second guide rail, and is used to slide in the first guide rail or the second guide rail when the slot changing cylinder moves axially to drive the slot changing cylinder to rotate, so as to force the cutting wire on the cutting wheel to switch from the first slot to the second slot. Through the present application, the automatic slot changing of the cutting wire of the multi-wire cutting device can be realized, and the automatic slot changing operation is simple, which can ensure the accurate adjustment of the slot position of the slot and improve the operation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of silicon rod processing, and in particular to a multi-wire cutting device and an automatic slot changing mechanism used in the multi-wire cutting device. Background Art

[0002] At present, with the society's emphasis on and openness to the use of green and renewable energy, the field of photovoltaic solar power generation has been increasingly valued and developed. In the field of photovoltaic power generation, common crystalline silicon solar cells are made on high-quality silicon wafers, which are cut from pulled or cast silicon ingots by multi-wire saws. At present, multi-wire cutting technology is widely used in the cutting of silicon rods due to its high production efficiency, low operating cost and high operating precision.

[0003] Multi-wire cutting technology uses a high-speed cutting wire as a carrier to drive the mortar particles for cutting. Generally, multiple cutting wheels and transition wheels are configured in multi-wire cutting equipment. The cutting wire is sequentially wound on the wire groove of the cutting wheel and the wire groove of the transition wheel corresponding to the cutting wheel to form multiple cutting wire segments, so that the silicon rods to be cut are cut using multiple cutting wire segments. After long-term use, the wire groove on the cutting wheel will wear out, affecting the cutting effect. When the wire groove position of the cutting wheel needs to be replaced, the moving distance of the cutting wheel needs to be calibrated. Usually, the moving distance needs to be measured and determined by the staff, which is not only inefficient, but also has the risk of accidentally injuring the operator during operation. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the related art, the purpose of the present application is to provide a multi-wire cutting device and an automatic slot changing mechanism used in the multi-wire cutting device.

[0005] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application discloses an automatic slot changing mechanism used in a multi-wire cutting device, comprising: a cutting wheel, comprising a first wire slot and a second wire slot for winding a cutting wire; a slot changing cylinder, linked with the cutting wheel, for driving the cutting wheel to move along its axial direction to move the cutting wire from the first wire slot to an adjacent second wire slot, comprising a cylinder body, and a first guide rail and a second guide rail connected to each other and opened on the cylinder body, the drop between the first guide rail and the second guide rail corresponding to the slot distance between the first wire slot and the second wire slot; a positioning member, which can be relatively slidably arranged in the first guide rail or the second guide rail, for sliding in the first guide rail or the second guide rail when the slot changing cylinder moves along the axial direction to drive the slot changing cylinder to rotate, so as to force the cutting wire on the cutting wheel to switch from the first wire slot to the second wire slot.

[0006] In certain embodiments of the first aspect of the present application, the first guide rail has a first landing end, and the first landing end has a first distance from the first wire groove; the second guide rail has a second landing end, and the second landing end has a second distance from the second wire groove; the first distance is equal to the second distance.

[0007] In certain embodiments of the first aspect of the present application, there is a transition end between the first landing end and the second landing end.

[0008] In certain embodiments of the first aspect of the present application, there is an upward section between the first landing end and the transition end, and the upward section has side walls with a first slope; there is a downward section between the transition end and the second landing end, and the downward section has side walls with a second slope.

[0009] In certain embodiments of the first aspect of the present application, the transition end has a first channel communicating with the upward section, and the transition end has a second channel communicating with the downward section, and the width of the first channel is smaller than that of the second channel.

[0010] In certain embodiments of the first aspect of the present application, the vertex of the transition end adjacent to the cutting wheel is located in the second channel.

[0011] In certain embodiments of the first aspect of the present application, the automatic groove-changing mechanism applied to the multi-wire cutting device further includes a driving device for driving the groove-changing cylinder to make telescopic movement along its axis.

[0012] In certain embodiments of the first aspect of the present application, the driving device includes a cylinder assembly or a lead screw assembly driven by a motor.

[0013] In certain embodiments of the first aspect of the present application, the positioning member is fixedly connected to a fixed seat connected to the multi-wire cutting device, and is used to set the positioning member in the first guide rail or the second guide rail.

[0014] In certain embodiments of the first aspect of the present application, the fixed seat is arranged as a cover body sleeving the groove-changing cylinder.

[0015] The second aspect of the present application discloses a multi-wire cutting device, including: a silicon rod bearing platform for bearing a vertically placed single-crystal silicon rod; and a wire cutting device arranged above the silicon rod bearing platform, including a plurality of cutting wheels and a cutting wire around which at least one cutting wire segment is formed; the automatic groove-changing mechanism provided in the first aspect of the present application.

[0016] In summary, for the multi-wire cutting equipment disclosed in the present application and the automatic groove-changing mechanism applied to the multi-wire cutting equipment, the cutting wheel is linked with the groove-changing cylinder. Only by driving the groove-changing cylinder to drive the cutting wheel to move along its axial direction can the cutting wire be moved from the first wire groove of the cutting wheel to the adjacent second wire groove. The entire automatic groove-changing process does not require manual participation and the automatic groove-changing operation is simple, which can ensure accurate adjustment of the wire groove position and improve the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It shows a schematic diagram of the overall structure of the multi-wire cutting equipment of the present application in an embodiment.

[0018] Figure 2 It shows a schematic diagram of the workbench conversion mechanism as a rotating mechanism in an embodiment of the multi-wire cutting equipment of the present application.

[0019] Figure 3a It shows a schematic diagram of a state of the workbench conversion mechanism as a translation mechanism in an embodiment of the multi-wire cutting equipment of the present application.

[0020] Figure 3b It shows a schematic diagram of another state of the workbench conversion mechanism as a translation mechanism in an embodiment of the multi-wire cutting equipment of the present application.

[0021] Figure 4 It shows a schematic diagram of the structure of the silicon rod loading and unloading device in an embodiment of the multi-wire cutting equipment of the present application.

[0022] Figure 5 Shown as Figure 4 a top view.

[0023] Figure 6 It shows a cross-sectional view of the first clamp of the silicon rod loading and unloading device in an embodiment of the multi-wire cutting equipment of the present application.

[0024] Figure 7 It shows a schematic diagram of the first driving structure in an embodiment of the multi-wire cutting equipment of the present application.

[0025] Figure 8 It shows a schematic diagram of the structure in which each cutting wheel group in the wire cutting device of the multi-wire cutting equipment of the present application has a pair of cutting wheels in an embodiment.

[0026] Figure 9 It shows a schematic diagram of the structure in which each cutting wheel group in the wire cutting device of the multi-wire cutting equipment of the present application has two pairs of cutting wheels in an embodiment.

[0027] Figure 10 Shown as Figure 9 a side structure diagram.

[0028] Figure 11It shows a schematic diagram of wire winding of a guide wheel in a wire cutting device of the multi-wire cutting equipment of the present application when each cutting wheel group has two pairs of cutting wheels in an embodiment.

[0029] Figure 12 It shows a schematic structural diagram of an automatic groove-changing mechanism applied to the multi-wire cutting equipment of the present application in cooperation with the wire cutting device in an embodiment.

[0030] Figure 13 It shows a schematic cross-sectional structural diagram of an automatic groove-changing mechanism applied to the multi-wire cutting equipment of the present application in an embodiment.

[0031] Figure 14 It shows as Figure 13 A partial enlarged view of part B of

[0032] Figures 15a to 15d It shows a schematic structural diagram of the movement process of an automatic groove-changing mechanism applied to the multi-wire cutting equipment of the present application in an embodiment.

[0033] Figure 16 It shows a schematic structural diagram of the multi-wire cutting equipment of the present application with a silicon rod pressing device in an embodiment.

[0034] Figure 17 It shows a schematic structural diagram of a side skin supporting mechanism of the multi-wire cutting equipment of the present application in an embodiment.

[0035] Figure 18 It shows a schematic structural diagram of a side skin lifting mechanism of the multi-wire cutting equipment of the present application in an embodiment.

[0036] Figure 19 It shows as Figure 2 A partial enlarged view of part A in

[0037] Figure 20 It shows a schematic external structural diagram of a side skin clamping mechanism of the multi-wire cutting equipment of the present application in an embodiment.

[0038] Figure 21 It shows a schematic cross-sectional structural diagram of a clamping assembly of the multi-wire cutting equipment of the present application in an embodiment. Detailed implementation manners

[0039] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification.

[0040] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and mechanical composition, structure, electrical, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is only defined by the claims of the published patent. The terms used herein are only for describing specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "beneath", "lower", "above", "upper", etc., may be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0041] Although in some instances the terms first, second, etc. are used herein to describe various elements or parameters, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one element or parameter from another. For example, the first wire groove may be referred to as the second wire groove, and similarly, the second wire groove may be referred to as the first wire groove, without departing from the scope of the various described embodiments. The first wire groove and the second wire groove are both describing a wire groove, but they are not the same wire groove unless the context clearly indicates otherwise in some other way. Similar situations also include the first guide rail and the second wire groove, or the first landing end and the second landing end.

[0042] Furthermore, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms, unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the described features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition only occurs when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0043] Existing single-crystal silicon rods are generally cylindrical in structure. After the silicon rods are squared by a multi-wire cutting device, after long-term use, the wire grooves on the cutting wheel of the multi-wire cutting device will wear, affecting the cutting effect. When it is necessary to replace the wire groove position of the cutting wheel, it is necessary to calibrate the moving distance of the cutting wheel, and usually the moving distance needs to be measured and determined by the staff, which is not only inefficient but also poses a risk of accidentally injuring the operator during operation. Therefore, it is necessary to propose a multi-wire cutting device and an automatic groove-changing mechanism applied to the multi-wire cutting device, so as to realize automatic groove replacement, improve the adjustment accuracy in the groove-changing operation, and improve the operation efficiency.

[0044] The following combines the embodiments and Figures 1 to 21 will elaborate on the multi-wire cutting device of the present application and the automatic groove-changing mechanism applied to the multi-wire cutting device in detail.

[0045] Please refer to Figure 1 , which shows the overall structural schematic diagram of the multi-wire cutting device of the present application in an embodiment. As shown in the figure, the multi-wire cutting device further includes a machine base 20. The machine base 20 is set as the main component of the multi-wire cutting device of the present application, and is used to provide a squaring operation platform. Preferably, the volume and weight of the machine base 20 are both relatively large to provide a larger installation surface and a more stable overall machine stability.

[0046] The at least two silicon rod carriers 21 are used to carry the vertically placed silicon rods. Each of the silicon rod carriers 21 has a rotating mechanism 210. The rotating mechanism 210 is used to drive the silicon rod placed on the silicon rod carrier 21 to rotate to adjust the surface to be cut. In an exemplary embodiment, the rotating mechanism 210 is set as a rotating turntable located at the bottom of the silicon rod carrier 21. The rotating turntable is controlled by a driving device (not shown). The driving device can be, for example, a servo motor that drives the rotating turntable to rotate, but is not limited thereto. In an alternative embodiment, the rotating mechanism 210 can adopt a lifting design, that is, after the rotating turntable at the bottom of the silicon rod carrier 21 is controlled, it can perform a telescopic action to drive the silicon rod carrier 21 to perform a lifting movement, so as to adjust the height of the silicon rod to be cut on the silicon rod carrier 21.

[0047] In order to better protect the silicon rod to be cut on the silicon rod carrier, in an exemplary embodiment, a buffer pad is fixed on the supporting surface of each silicon rod carrier 21 (the supporting surface is the upper surface of the silicon rod carrier for supporting the silicon rod to be cut), so that the buffer pad is located between the silicon rod carrier 21 and the silicon rod to be cut when the silicon rod to be cut is placed.

[0048] In an embodiment, refer to Figure 1, the at least two silicon rod bearing platforms 21 are directly disposed on the machine base and are arranged at intervals in a straight line in the cutting area. When the at least two silicon rod bearing platforms 21 support the silicon rods to be cut, the centers of the supported silicon rods to be cut are located on the same straight line (as shown in Figure 1 ), it is easy to understand that the cutting area is the area where the square-cutting equipment cuts the silicon rods. Specifically, the cutting area is, for example, the area below the cutting device in the multi-wire cutting equipment.

[0049] In practical applications, in order to improve work efficiency and enable the square-cutting equipment to perform cutting work and loading / unloading work simultaneously, please refer to Figure 2 , which shows a schematic diagram of the workbench conversion mechanism as a rotating mechanism in an embodiment of the multi-wire cutting equipment of the present application. As shown in the figure, in another embodiment, the at least two silicon rod bearing platforms 21 can be disposed on the silicon rod workbench 22. The silicon rod workbench 22 is provided with a workbench conversion mechanism 220 for driving the silicon rod workbench 21 to perform a conversion movement so that the silicon rod bearing platforms on the silicon rod workbench 21 are converted between the loading / unloading area and the cutting area. It is easy to understand that the loading / unloading area is the area for loading and unloading in the multi-wire cutting equipment, specifically, for example, the areas corresponding to both sides of the silicon rod workbench in the multi-wire cutting equipment. The cutting area is the area for cutting the silicon rods to be cut on the multi-wire cutting equipment, specifically, for example, the area below the cutting device in the multi-wire cutting equipment.

[0050] In this embodiment, the silicon rod workbench 22 is disposed on the machine base 20 and is set to be at least one. At least two silicon rod bearing platforms 21 are provided on each silicon rod workbench 22. At least one of the silicon rod bearing platforms 21 on each silicon rod workbench 22 is located in the cutting area, and at least one silicon rod bearing platform 21 is located in the loading / unloading area. The silicon rod bearing platforms 21 located in the cutting area on each silicon rod workbench 22 are arranged at intervals in sequence in a straight line. Thus, when the silicon rod bearing platforms 21 located in the cutting area support the silicon rods to be cut, the centers of the supported silicon rods to be cut are located on the same straight line. In an exemplary embodiment, refer to Figure 2 , two silicon rod workbenches 22 are provided on the machine base. Four silicon rod bearing platforms 21 are provided on each silicon rod workbench 22. Two of the silicon rod bearing platforms 21 on each silicon rod workbench 22 are located in the cutting area, and the other two silicon rod bearing platforms 21 are located in the loading / unloading area. The four silicon rod bearing platforms 21 located in the cutting area on the two silicon rod workbenches 22 are arranged at intervals in sequence in a straight line, but it is not limited thereto. In other exemplary embodiments, the silicon rod workbench 22 can also be set to be one or more.

[0051] In an exemplary embodiment, please refer to Figure 2, as shown in the figure, the workbench conversion mechanism 220 is a rotating mechanism, and the rotating mechanism includes a rotating shaft 2200 and a rotation driving unit (not shown in the figure). The rotating shaft 2200 is pivotally connected to the silicon rod workbench 22, and the power output shaft of the rotation driving unit is pivotally connected to the rotating shaft 2200 for driving the rotating shaft 2200 to rotate so as to drive the silicon rod workbench 22 to rotate. In this embodiment, the rotating shaft 2200 is disposed in the central region at the bottom of the silicon rod workbench 22 and is connected to the machine base 20. The silicon rod bearing platforms 21 located in the cutting area and the silicon rod bearing platforms 21 located in the loading and unloading area are centrosymmetric with respect to the rotating shaft 2200. Thus, by driving the rotation of the silicon rod workbench 22, the silicon rod bearing platforms 21 located on the silicon rod workbench 22 can be switched between the cutting area and the loading and unloading area. It should be noted that in the embodiment where the workbench conversion mechanism 220 is set as a rotating mechanism, loading and unloading are performed on one side of the multi-wire cutting equipment. In actual operation, to convert the silicon rod between the cutting area and the loading and unloading area, first, the rotation driving unit (such as a common driving motor) drives the rotating shaft 2200 to drive the silicon rod workbench 22 to rotate (such as rotating 180°), so that the silicon rod bearing platform 21 originally located in the cutting area is rotated to the loading and unloading area for unloading and loading new materials, and the silicon rod bearing platform 21 originally located in the loading and unloading area is switched to the cutting area for cutting. In this way, the multi-wire cutting equipment of the present application can perform cutting work and loading and unloading work simultaneously, improving work efficiency. In other embodiments, other methods can also be adopted for the rotating mechanism that drives the silicon rod workbench to rotate. For example, the rotating mechanism can also adopt a gear transmission method. Specifically, a transmission wheel is disposed at the bottom of the silicon rod workbench, and a driving wheel meshing with the transmission wheel is disposed on the machine base 20. The driving wheel is controlled by a rotation driving motor, and the driving motor drives the driving wheel to rotate to drive the driven wheel to rotate, so that the silicon rod workbench 22 follows the driven wheel to rotate to drive the silicon rod bearing platform 21 to switch between the loading and unloading area and the cutting area.

[0052] In another exemplary embodiment, please refer to Figure 3a and Figure 3b , Figure 3a which shows a schematic state diagram of the workbench conversion mechanism of the multi-wire cutting equipment of the present application being a translation mechanism in an embodiment; Figure 3b which shows another schematic state diagram of the workbench conversion mechanism of the multi-wire cutting equipment of the present application being a translation mechanism in an embodiment. As shown in the figure, the workbench conversion mechanism 220 is a translation mechanism, and the translation mechanism includes a translation guide rail 2201, a slider 2202, and a translation driving unit (not shown). The translation guide rail 2201 is laid on the machine base 20. The slider 2202 is disposed at the bottom of the silicon rod workbench 22 and is adapted to the translation guide rail 2201 to provide translation guidance for the silicon rod workbench 22. The translation driving unit is used to drive the silicon rod workbench 22 to move along the translation guide rail 2201 (as shown inFigure 3a and Figure 3b The arrow direction in Figure 3b is adjusted to switch the silicon rod carrier 21 on the silicon rod workbench 22 between the cutting area and the loading / unloading area. The translation drive unit can be a cylinder assembly or a lead screw assembly driven by a motor. It should be noted that in the embodiment where the workbench conversion mechanism 220 is a translation mechanism, loading and unloading are performed on both sides of the multi-wire cutting equipment. During actual operation, while the silicon rod carried by the silicon rod carrier 21 in the cutting area on the silicon rod workbench is being cut, after the silicon rod carrier 21 in the loading / unloading area on one side has loaded the silicon rod to be cut (in the state shown in Figure 3a ), the translation drive unit drives the silicon rod workbench 22 along the X direction of the slide rail (in the arrow direction shown in Figure 3a ) to move the silicon rod carrier 21 carrying the cut silicon rod in the cutting area to the other side loading / unloading area for unloading and loading the silicon rod to be cut. At the same time, the silicon rod carrier 21 carrying the silicon rod to be cut in the loading / unloading area on one side is moved to the cutting area to cut the silicon rod to be cut (in the state shown in Figure 3b ). Then, the translation drive unit drives the silicon rod workbench 22 to retreat along the slide rail (in the arrow direction shown in Figure 3b ) to move the silicon rod carrier 21 loaded with the silicon rod to be cut on the other side back to the cutting area for cutting operations. At the same time, the silicon rod carrier 21 that has completed the cutting operation in the cutting area returns to the loading / unloading area on one side to continue unloading and loading the silicon rod to be cut (in the state shown in Figure 3a ). By repeating this process, the multi-wire cutting equipment of the present application can perform cutting work and loading / unloading work simultaneously, significantly improving work efficiency. In other embodiments, the translation mechanism can also adopt a gear drive method. Specifically, the translation mechanism includes a translation tooth rail and a rotating gear driven by a motor and adapted to the translation tooth rail. The translation tooth rail is arranged at the bottom of the silicon rod workbench and can be, for example, at least one rack with a certain length. In order to make the silicon rod workbench move smoothly, each rack is equipped with at least two rotating gears arranged at intervals. The motor drives the rotating gears to rotate to drive the silicon rod workbench to move, so as to switch the silicon rod carrier on the silicon rod workbench between the cutting area and the loading / unloading area.

[0053] It should be added that, for the convenience of loading and unloading the silicon rod, the multi-wire cutting equipment of the present application further includes a silicon rod loading and unloading device, which is adjacent to the silicon rod bearing table. Further, the silicon rod loading and unloading device is arranged on one side or opposite sides of the silicon rod workbench, and is used to load the silicon rod to be cut in the storage area onto the silicon rod bearing table in the loading area on the silicon rod workbench so that the silicon rod workbench can send the silicon rod to be cut to the cutting area for cutting, and transfer the cut silicon rod transferred from the cutting area to the loading and unloading area by the silicon rod workbench to the storage area to unload the cut silicon rod. In one embodiment, the silicon rod loading and unloading device is arranged on one side of the silicon rod workbench. At this time, the workbench conversion mechanism of the silicon rod workbench is the rotation mechanism as described above, and the silicon rod is loaded and unloaded on one side of the silicon rod workbench; in another embodiment, the silicon rod loading and unloading device is arranged on both sides of the silicon rod workbench. At this time, the workbench conversion mechanism of the silicon rod workbench is the translation mechanism as described above, and the silicon rod is loaded and unloaded on both sides of the silicon rod workbench. It is easy to understand that the storage area is an area adjacent to the multi-wire cutting equipment and is used to place or store the silicon rod to be cut and the cut silicon rod.

[0054] Please refer to Figures 4 to 6 , Figure 4 which shows a schematic structural view of the silicon rod loading and unloading device of the multi-wire cutting equipment of the present application in an embodiment; Figure 5 Shown as Figure 4 the top view of Figure 6 which shows a cross-sectional view of the first clamp of the silicon rod loading and unloading device of the multi-wire cutting equipment of the present application in an embodiment. As shown in the figure, the silicon rod unloading device 23 is arranged on a bottom mounting structure, and the bottom mounting structure protrudes from the machine base. The silicon rod unloading device 23 includes a reversing carrier 230, a first clamp, and a second clamp. The reversing carrier 230 is used for reversing movement. The first clamp and the second clamp are arranged on the reversing carrier 230. By driving the reversing carrier to make a reversing movement, the first clamp and the second clamp arranged on the reversing carrier 230 can be converted between the storage area and the loading and unloading area to transfer and clamp the cut silicon rod and the silicon rod to be cut.

[0055] The commutation carrier 230 is disposed on the bottom mounting structure and can perform commutation movement relative to the bottom mounting structure. In one embodiment, the commutation carrier 230 realizes the commutation movement through a commutation mechanism. The commutation mechanism may include a rotating shaft and a commutation motor. The commutation carrier 230 is shaft-connected to the bottom mounting structure below it through the rotating shaft. When implementing the steering movement, the commutation motor is started to drive the rotating shaft to rotate, so as to drive the commutation carrier 230 to rotate to realize the commutation movement. The driving of the rotating shaft to rotate can be designed as one-way rotation or two-way rotation. The one-way rotation can be, for example, clockwise rotation or counterclockwise rotation, and the two-way rotation can be, for example, clockwise rotation and counterclockwise rotation. In addition, the rotation angle of the driving rotating shaft can be set according to the actual structure of the silicon rod loading and unloading device 23. Among them, the actual structure of the silicon rod loading and unloading device can be, for example, that the rotation angle of the driving rotating shaft can be determined according to the positional relationship between the storage area and the loading and unloading area or the structure of the commutation carrier 230, etc. The central position of the commutation base in the commutation carrier 230 is connected to the rotating shaft. Generally, the shape of the commutation base can adopt the structure of a disc, but it is not limited thereto, and it can also adopt a square disc or an elliptical disc. The first clamp is disposed in the first clamp area of the commutation carrier 230 and is used for clamping the silicon rod to be cut, and the second clamp is disposed in the second clamp area of the commutation carrier 230 and is used for clamping the cut silicon rod. In the embodiment, the first clamp area and the second clamp area can be set according to the actual device structure. For example, the first clamp area and the second clamp area are two areas disposed back to back in the commutation carrier 230. Further, the first clamp area and the second clamp area can be 180° apart, so that the storage area and the loading and unloading area are in a straight line (of course, it can also be understood in this way: the storage area and the loading and unloading area are in a straight line and are respectively located on opposite sides of the commutation carrier 230. Therefore, the first clamp area for setting the first clamp and the second clamp area for setting the second clamp in the commutation carrier 230 can be 180° apart). In this way, after the commutation carrier 230 is rotated 180°, the first clamp and the second clamp can exchange positions. However, in practical applications, the setting relationship of the first clamp area and the second clamp area or the loading and unloading station and the working station does not have to be so demanding. The first clamp area and the second clamp area can also be, for example, 90° apart. Even more, the first clamp area and the second clamp area can be at any position within a suitable range, as long as there is no unnecessary interference between the first clamp area and the second clamp area.

[0056] The first clamp further includes a first clamp mounting member 231 and at least two first clamping members 232. Among them, the at least two first clamping members 232 are spaced apart relative to the first clamp mounting member 231 and are used for clamping the silicon rod to be cut. In one embodiment, the silicon rod to be cut located on the silicon rod carrier table is placed vertically. Therefore, the at least two first clamping members 232 are vertically spaced apart relative to the first clamp mounting member 231, that is, the at least two first clamping members 232 are arranged one above the other.

[0057] In a specific implementation manner, any one of the first clamping members 232 further includes: a first clamping arm mounting seat 2320 and at least two first clamping arms 2321. Among them, the first clamping arm mounting seat 2320 is arranged on the first fixture mounting member 231, and at least two first clamping arms 2321 are movably arranged on the first clamping arm mounting seat 2320. In view of the fact that the cross-section of the silicon rod to be cut is circular, in an alternative embodiment, the first clamping member 232 as a whole is a circular workpiece fixture, and the first clamping arms 2321 that make up the first clamping member 232 are two symmetrically designed. A single first clamping arm 2321 is designed to have an arc-shaped clamping surface. Preferably, the arc-shaped clamping surface of a single first clamping arm 2321 exceeds a quarter of a circle. In this way, the arc-shaped clamping surface of the first clamping member 232 composed of two first clamping arms 2321 exceeds a half of a circle. Of course, a buffer pad can be additionally provided on the arc-shaped clamping surface in the first clamping arm 2321 to avoid damaging the surface of the silicon rod to be cut during the process of clamping the silicon rod to be cut, and achieve a good effect of protecting the silicon rod to be cut. Generally, when the first clamping arms 2321 in the first clamping member 232 are in a clamped state, the center of the clamping space formed by the two first clamping arms 2321 coincides with the center of the silicon rod to be cut. Therefore, when using the first clamping member 232 to clamp the silicon rod to be cut placed upright in the placement area, the two first clamping arms 2321 in the first clamping member 232 contract, and the arc-shaped clamping surfaces in the first clamping arms 2321 abut against the silicon rod to be cut. During the process of the first clamping arms 2321 contracting and clamping the silicon rod to be cut, the silicon rod to be cut is pushed by the two first clamping arms 2321 on both sides and moves towards the central area of the clamping space until the silicon rod to be cut is clamped by the two first clamping arms 2321 in the first clamping member 232. At this time, the center of the silicon rod to be cut can be located at the center of the clamping space of the first clamping member 232.

[0058] To enable at least two first clamping arms 2321 in the first clamping member 232 to smoothly and stably clamp single-wafer silicon rods of different size specifications, the first clamping member 232 further includes a first clamping arm driving mechanism for driving at least two first clamping arms 134 to perform opening and closing actions.

[0059] Please refer to Figure 6, as shown in the figure, in a specific implementation, the first clamping arm driving mechanism further includes: a first opening and closing gear 2322, a first gear driving member 2323, and a first driving source 2324. The first opening and closing gear 2322 is disposed on the corresponding first clamping arm 2321. The first gear driving member 2323 has tooth patterns meshing with the first opening and closing gear 2322 on the first clamping arm 2321. The first driving source 2324 is connected to the first gear driving member 2323 for driving the first gear driving member 2323 to move. In one implementation, the first gear driving member 2323 is a first rack, which is located in the middle of the two first clamping arms 2321. On the two outer side surfaces of the first rack facing the two first clamping arms 2321 on both sides, there are respectively tooth patterns corresponding to meshing with the first opening and closing gears 2322 on the two first clamping arms 2321. The first driving source 2324 can be, for example, a driving motor or a cylinder. Thus, according to the above implementation, in practical applications, when it is necessary to realize the clamping of the first clamping arm 2321, the driving motor or cylinder as the first driving source 2324 drives the first rack as the first gear driving member 2323 to move upward. The first rack drives the two meshing first opening and closing gears 2322 on both sides to perform an outward rotation action. During the outward rotation process, the first opening and closing gear 2322 drives the first clamping arm 2321 (the first opening and closing gear 2322 and the first clamping arm 2321 can be connected by a rotating shaft) to perform a lowering action to change from the loosened state to the clamped state; conversely, when it is necessary to realize the loosening of the first clamping arm 2321, the driving motor (or cylinder) as the first driving source 2324 drives the first rack as the first gear driving member 2323 to move downward. The first rack drives the two meshing first opening and closing gears 2322 on both sides to perform an inward rotation action. During the inward rotation process, the first opening and closing gear 2322 drives the first clamping arm 2321 (the first opening and closing gear 2322 and the first clamping arm 2321 can be connected by a rotating shaft) to perform a raising action to change from the clamped state to the loosened state. Of course, the above is only an embodiment and is not used to limit the working state of the first clamping member 232. In fact, the above state changes of "upward", "outward rotation", "lowering", "downward", "inward rotation", "raising", as well as "loosening" and "clamping" can have other changes according to the structure and operation mode of the first clamping arm 2321 and the structure of the first clamping arm driving mechanism.

[0060] As is known to those skilled in the art, the silicon rods to be cut are formed by truncating the original long silicon rods, which will inevitably result in significant differences in the sizes of the silicon rods to be cut. Since the first fixture is used to clamp the silicon rods to be cut in the vertically placed state, for the first fixture, the influence of the above-mentioned size differences is mainly manifested as the concern about whether the first clamping member 232 in the first fixture can correspondingly clamp the silicon rods to be cut due to the length difference of the silicon rods to be cut.

[0061] To reduce or even eliminate the risk that the above-mentioned first clamping member 232 may fail to clamp the silicon rod to be cut, different design solutions for the first fixture are available.

[0062] In one implementation, the first fixture adopts a fixed clamping member, that is, as many first clamping members 232 as possible are fixedly arranged vertically on the commutation carrier 230, and the distance between two adjacent first clamping members 232 among these first clamping members 232 is as small as possible. In this way, various specifications and lengths of silicon rods to be cut can be covered by these first clamping members. For example, if the length of the silicon rod to be cut is long, more first clamping members 232 on the commutation carrier 230 are used for clamping; if the length of the silicon rod to be cut is short, fewer first clamping members 232 on the commutation carrier 230 are used for clamping. For example, several first clamping members 232 located below are used for clamping, and those first clamping members 232 located above and higher than the silicon rod to be cut do not participate.

[0063] In other implementations, the first fixture adopts a movable clamping member, that is, the first clamping member 232 is movably arranged vertically in the first fixture area of the commutation carrier 230. Since the first clamping member is of a movable design, the number of the first clamping members 232 can be significantly reduced, and generally two or three are sufficient. In this way, various specifications and lengths of silicon rods to be cut can be covered by the movable clamping member. For example, if the length of the silicon rod to be cut is long, the movably arranged first clamping member 232 is moved to extend the clamping distance between the two first clamping members 232; if the length of the silicon rod to be cut is short, the movably arranged first clamping member 232 is moved to shorten the clamping distance between the two first clamping members 232. In the implementation where the first fixture adopts a movable clamping member, to facilitate the smooth up and down movement of the movable clamping member to adjust the position, the first fixture mounting member 231 in the first fixture can be used to guide the movably arranged first clamping member 232. In one achievable way, the first fixture mounting member 231 can adopt a guide post structure, and the first clamping arm mounting seat 2320 adopts a movable block structure sleeved on the guide post structure. Specifically, the guide post structure serving as the first fixture mounting member 231 includes two parallel guide posts arranged vertically, and the movable block structure serving as the first clamping arm mounting seat 2320 is provided with two through holes or two clamping clips corresponding to the two guide posts in the guide post structure. If through holes are adopted, the movable block is sleeved on the guide post and can slide along the guide post. If clamping clips are adopted, the movable block clamps on the guide post and can slide along the guide post, where, in practical applications, the clamping clip can clamp at least half of the guide post.

[0064] To achieve the movement of the first clamping member 232, the first clamping member 232 with a movable design may be provided with a first guiding and driving mechanism. The first guiding and driving mechanism can be used to drive the first clamping member 232 with a movable design to move up and down along the first fixture mounting member 231. In one implementation, the first guiding and driving mechanism may include, for example: a first guiding lead screw 2325 and a first guiding motor 2326. Among them, the first guiding lead screw 2325 is arranged vertically. One end of the first guiding lead screw 2325 is connected to the first clamping arm mounting seat 2320, and the other end of the first guiding lead screw 2325 is connected to the first guiding motor 2326. The first guiding motor 2326 can be arranged on the top of the commutation carrier 230, but it is not limited thereto.

[0065] In another alternative embodiment, both of the first clamping members 232 are of a movable design. In this way, in practical applications, the clamping distance between them can be adjusted by the movement of the two first clamping members 232 with a movable design. Since the first clamping member 232 is of a movable design, at least one of the two first clamping members 232 needs to be provided with a first guiding and driving mechanism for driving the two first clamping members 232 to move along the first fixture mounting member 231. Compared with the previous alternative embodiment, in this alternative embodiment, since both of the first clamping members 232 in the first fixture are of a movable design, there will be a situation where the first guiding and driving mechanism is provided on one of the two first clamping members 232 or on both of the two first clamping members 232.

[0066] Taking the example that the first guiding drive mechanism is arranged in the upper first clamping member 232 among the two first clamping members 232, in this case, on the one hand, the first clamping arm mounting seat 2320 in any of the two first clamping members 232 is movably connected to the first fixture mounting member 231, that is, the first clamping arm mounting seat 2320 and the first clamping arm 2321 thereon in any of the first clamping members 232 move up and down along the first fixture mounting member 231. On the other hand, the arranged first guiding drive mechanism includes a first guiding lead screw 2325 and a first guiding motor 2326. Among them, one end of the first guiding lead screw 2325 is connected to the first clamping arm mounting seat 2320 in the upper first clamping member 232, and the other end of the first guiding lead screw 2325 is connected to the first guiding motor 2326. The first guiding motor 2326 can be arranged on the top of the commutation carrier 230. Thus, when it is necessary to adjust the position of the upper first clamping member 232, the first guiding motor 2326 drives the first guiding lead screw 2325 to rotate. During the rotation of the first guiding lead screw 2325, it drives the first clamping member 232 to move up and down along the first fixture mounting member 2311310. For example, when the first guiding motor 2326 drives the first guiding lead screw 2325 to rotate clockwise, it drives the upper first clamping member 232 to move upward along the first fixture mounting member 231 to be away from the lower first clamping member 232, increasing the clamping distance between the two first clamping members 232; when the first guiding motor 2326 drives the first guiding lead screw 2325 to rotate reversely, it drives the upper first clamping member 232 to move downward along the first fixture mounting member 231 to be close to the lower first clamping member 232, reducing the clamping distance between the two first clamping members 232. Thus, by controlling the movably designed first clamping member 232, the clamping distance between the two first clamping members 232 can be adjusted, so as to effectively clamp the silicon rods 101 to be cut with different specifications and lengths.

[0067] Actually, in the case where both of the two first clamping members 232 are of a movable design, by using the first guiding and driving mechanism, not only can the clamping distance between the two first clamping members 232 be adjusted to effectively clamp the silicon rod 101 to be cut with different specifications and lengths, but also the purpose of lifting and lowering the clamped silicon rod 101 to be cut can be achieved. After the two first clamping members 232 effectively clamp the silicon rod 101 to be cut, the silicon rod 101 to be cut is lifted and lowered by driving the up and down movement of the first clamping members 232. Specifically, still taking the first guiding and driving mechanism provided on the upper first clamping member 232 as an example, first, the upper first clamping member 232 moves up and down along the first fixture mounting member 231 through the first guiding and driving mechanism to adjust the clamping distance between it and the lower first clamping member 232; then, the first clamping arm driving mechanism in each first clamping member 232 is used to drive the corresponding two first clamping arms 2321 to perform a clamping action to smoothly and firmly clamp the silicon rod 101 to be cut; subsequently, the upper first clamping member 232 is driven by the first guiding and driving mechanism to move upward along the first fixture mounting member 231. At this time, due to the friction force, the clamped silicon rod 101 to be cut and the lower first clamping member 232 move upward together. Among them, the upward movement of the clamped silicon rod 101 to be cut utilizes the friction force between the upper first clamping member 232 and the silicon rod 101 to be cut, and the upward movement of the first clamping member 232 utilizes the friction force between the silicon rod 101 to be cut and the lower first clamping member 232, thereby achieving the effect of lifting the silicon rod 101 to be cut. The process of the upper first clamping member 232 driving the silicon rod 101 to be cut and the lower first clamping member 232 to move downward under the drive of the first guiding and driving mechanism is the same, thereby achieving the effect of lowering the silicon rod 101 to be cut, which will not be elaborated here.

[0068] It should be noted that in other variations, for example, the first guiding and driving mechanism is provided on the lower first clamping member 232 among the two first clamping members 232. The structure, setting method, and driving working mode of the first guiding and driving mechanism are similar to those of the first guiding and driving mechanism of the upper first clamping member 232 mentioned above. For example, the lower first clamping member 232 moves up and down along the first fixture mounting member 231 under the drive of the first guiding and driving mechanism to adjust the clamping distance between it and the upper first clamping member 232, and the lower first clamping member 232 drives the silicon rod 101 to be cut and the upper first clamping member 232 to move up and down along the first fixture mounting member 231 together under the drive of the first guiding and driving mechanism, etc. Another example is that both of the two first clamping members 232 are provided with the first guiding and driving mechanism. Then, the setting method and driving working mode of the first guiding and driving mechanism and the movement modes of the two first clamping members 232 go without saying and will not be elaborated here.

[0069] In the case where the first clamping member 232 for the movable setting moves up and down along the first fixture mounting member 231 to adapt to the silicon rods to be cut with different specified lengths for clamping, in addition to the first clamping member 232 adopting a movable structural design and the first clamping member 232 needing to be provided with a first guiding and driving mechanism, etc., it is necessary to know the specified length of the silicon rods to be cut that need to be clamped currently. In view of this, the workpiece transfer device in the present application may further include a height detector (not shown in the drawings), which is used for the height of the silicon rods to be cut placed upright, so as to serve as the basis for the first clamping member 232 for the movable setting to move up or down along the first fixture mounting member 231 and the moving distance in the subsequent process.

[0070] Since the second fixture is arranged in the second fixture area and is used to clamp the cut silicon rods, the cross-section of the cut silicon rods in the present application is rectangular, so the structure of the second fixture is the same as that of the first fixture described above, including a second fixture mounting member 233 and at least two second clamping members 234. Any one of the second clamping members 234 further includes: a second clamping arm mounting seat 2340 and at least two second clamping arms 2341. Among them, the second clamping arm mounting seat 2340 is arranged on the second fixture mounting member 233, and at least two second clamping arms 2341 are movably arranged on the second clamping arm mounting seat 2340. The difference is only that the second clamping member of the second fixture is an overall square workpiece fixture. Specifically, there are two symmetrically designed second clamping arms 2341 that make up the second clamping member 234, and a single second clamping arm 2341 is designed to have a single flat clamping surface (see Figure 4 and Figure 5 ), and the other structures of the second fixture will not be elaborated here.

[0071] Please refer to Figure 2 , as shown in the figure, the wire cutting device is arranged above the at least two silicon rod bearing platforms 21 and is used for cutting the silicon rods to be cut. In one embodiment, the wire cutting device includes a cutting machine frame 24 and a wire cutting unit 25. The wire cutting unit 25 is supported by the cutting machine frame 24 above the at least two silicon rod bearing platforms 21, and the cutting machine frame 24 is fixed on the machine base 20.

[0072] In one embodiment, the cutting frame 24 includes two support columns 240 arranged opposite to each other and a mounting frame 241 straddling the opposite sides of the two support columns. The mounting frame 241 is used to place the wire cutting unit 25 and is driven by a first driving mechanism to move up and down for cutting operations. In order to provide a direction guide for the up and down movement of the wire cutting unit 25, lifting guide rails 242 are provided on the opposite sides of the two support columns. Sliders (not labeled in the drawings) matching the lifting guide rails 242 are provided on the mounting frame 241. The first driving mechanism drives the mounting frame 241 to drive the wire cutting unit 25 to move up and down along the lifting guide rails 242 to perform cutting operations on the silicon rod to be cut.

[0073] In one embodiment, the first driving mechanism is set as a cylinder assembly or a lead screw assembly. Please refer to Figure 7 , which shows a schematic diagram of the first driving structure of the multi-wire cutting equipment of the present application in one embodiment. As shown in the figure, the first driving mechanism is set as a lead screw assembly. The lead screw assembly includes a lead screw 243 and a motor 244. One end of the lead screw 243 is connected to the mounting frame 241, and the other end is connected to the motor 244 and is driven by the motor 244 to drive the mounting frame 241 to move up and down. However, it is not limited to this. In other embodiments, the first driving mechanism can also be a cylinder assembly.

[0074] Please refer to Figure 2 , as shown in the figure, the wire cutting unit 25 includes a plurality of cutting wheel sets 251 corresponding to the number of silicon rod bearing platforms 21. Each cutting wheel set 251 includes a pair of cutting wheels or two pairs of cutting wheels. A cutting line segment is formed between the two cutting wheels in any pair of cutting wheels. A transition wheel 252 is provided between adjacent cutting wheel sets 251. The wire groove of the transition wheel 252 is in the same plane as the wire groove of the cutting wheels in the cutting wheel set 251. In order to be able to perform cutting operations on multiple silicon rods to be cut simultaneously, in this embodiment, the number of the plurality of cutting wheel sets 251 is the same as the number of silicon rod bearing platforms 21 located in the cutting area and they correspond to each other one by one. In this way, during the cutting operation, each cutting wheel set 251 cuts the silicon rod to be cut on its corresponding silicon rod bearing platform 21.

[0075] In view of the complex spatial layout of the cutting wheels of the existing wire cutting device, a large number of transition wheels are required to reverse the cutting wire, resulting in complex wire winding, large space occupied by the open equipment, and high manufacturing cost. Therefore, in one embodiment, as Figure 2 shown, the plurality of cutting wheel sets 251 are arranged on the mounting frame 241 in a straight line distribution manner.

[0076] In one case, each cutting wheel group includes a pair of cutting wheels. The pair of cutting wheels in each cutting wheel group are sequentially arranged on the same side of the mounting bracket. Only one transition wheel is provided between the pair of cutting wheels in two adjacent cutting wheel groups to guide the cutting wire, so that a cutting wire segment is formed between the two cutting wheels in each pair of cutting wheels. The wire groove of the transition wheel and the wire grooves of the cutting wheels in the adjacent cutting wheel group are in the same plane, so that the cutting wire segments between the two cutting wheels of each cutting wheel group are on the same straight line. Preferably, the length of each formed cutting wire segment is slightly greater than the diameter of the cross-sectional circle of the silicon rod to be cut.

[0077] Please refer to Figure 8 , which shows a schematic structural diagram of each cutting wheel group having a pair of cutting wheels in the wire cutting device of the multi-wire cutting equipment of the present application in an embodiment. Taking the wire cutting unit in the figure including four cutting wheel groups as an example for wire winding description, the four cutting wheel groups are respectively the first cutting wheel group 251a, the second cutting wheel group 251b, the third cutting wheel group 251c and the fourth cutting wheel group 251d. A first transition wheel 252a is provided between the first cutting wheel group 251a and the second cutting wheel group 251b, a second transition wheel 252b is provided between the second cutting wheel group 251b and the third cutting wheel group 251c, and a third transition wheel 252c is provided between the third cutting wheel group 251c and the fourth cutting wheel group 251d. A single continuous cutting wire is sequentially wound around the pair of cutting wheels of the first cutting wheel group 251a, so as to form a first cutting wire segment L10 on the pair of cutting wheels of the first cutting wheel group 251a. Then, after passing through the first transition wheel 252a to guide the cutting wire, it is then sequentially wound around the pair of cutting wheels of the second cutting wheel group 251b, and a second cutting wire segment L20 is formed on the pair of cutting wheels of the second cutting wheel group 251b. Then, after passing through the second transition wheel 252b to guide the cutting wire, it is sequentially wound around the pair of cutting wheels of the third cutting wheel group 251c, and a third cutting wire segment L30 is formed on the pair of cutting wheels of the third cutting wheel group 251c. Finally, after passing through the third transition wheel 252c to guide the cutting wire, it is sequentially wound around the pair of cutting wheels of the fourth cutting wheel group 251d to form a fourth cutting wire segment L40 and then exits. In this case, when the wire cutting unit performs a single downward pressing cut, one axial cutting surface of four silicon rods to be cut can be completed simultaneously. In the process of completing one squaring operation, four axial cutting surface cutting processes need to be executed. After each axial cutting surface is cut, the silicon rod carrier 21 needs to be rotated (90 degrees each time) by the rotating mechanism 210 of the silicon rod carrier 21 to adjust the cutting surface of the silicon rod to be cut. It should be noted that in order to ensure that the squared silicon rod is in a cuboid shape as a whole, the intersection points of the cutting wires when the wire cutting unit cuts the silicon rod four times for a single axial cutting surface are within the cross-sectional circle of the silicon rod to be cut (including the case where the intersection points are on the circumference of the cross-sectional circle).

[0078] In another case, each cutting wheel group includes two pairs of cutting wheels. The two pairs of cutting wheels in each cutting wheel group are respectively and sequentially arranged on opposite sides of the mounting bracket. A guide wheel group is also arranged on the mounting bracket to reverse the cutting wire so as to guide the cutting wire from the cutting wheel on one side of the mounting bracket to the cutting wheel on the other side of the mounting bracket. A transition wheel group is arranged between two adjacent cutting wheel groups to guide the cutting wire. The transition wheel group includes two transition wheels. One transition wheel guides a pair of cutting wheels in two adjacent cutting wheel groups, and the other transition wheel guides the other pair of cutting wheels in two adjacent cutting wheel groups, so that a cutting wire segment is formed between the two cutting wheels in any pair of cutting wheels. The wire grooves of the transition wheels on the same side are in the same plane as the wire grooves of the cutting wheels, so that the cutting wire segments between the two cutting wheels on the same side in multiple cutting wheel groups are on the same straight line. Preferably, the length of each formed cutting wire segment is slightly greater than the diameter of the cross-sectional circle of the silicon rod to be cut.

[0079] Please refer to Figures 9 to 11 , Figure 9 which shows a schematic structural view of each cutting wheel group having two pairs of cutting wheels in the wire cutting device of the multi-wire cutting equipment of the present application in an embodiment; Figure 10 Shown as Figure 9 the side structural schematic diagram of Figure 11Shown is a schematic diagram of wire winding of a guide wheel in a wire cutting device of the multi-wire cutting equipment of the present application when each cutting wheel group has two pairs of cutting wheels. Taking the wire cutting device shown in the figure including four cutting wheel groups as an example for wire winding description, the four cutting wheel groups are respectively a first cutting wheel group 251a, a second cutting wheel group 251b, a third cutting wheel group 251c and a fourth cutting wheel group 251d. A first transition wheel group is provided between the first cutting wheel group 251a and the second cutting wheel group 251b, a second transition wheel group is provided between the second cutting wheel group 251b and the third cutting wheel group 251c, and a third transition wheel group is provided between the third cutting wheel group 251c and the fourth cutting wheel group 251d. In view of the cutting wire being a single continuous cutting wire, a guide wheel group 253 is further provided between the two sides of the mounting frame to reverse the cutting wire so as to guide the cutting wire from the cutting wheel on one side of the mounting frame 241 to the cutting wheel on the other side of the mounting frame 241.The cutting line winds around from one side of the mounting frame, and sequentially winds around a pair of cutting wheels 251a' of the first cutting wheel set 251a, thereby forming a first cutting line segment L11 on the pair of cutting wheels 251a' of the first cutting wheel set 251a. Then, after guiding the cutting line around a guide wheel 252a' in the first transition wheel set, it sequentially winds around a pair of cutting wheels 251b' of the second cutting wheel set 251b, forming a second cutting line segment L21 on the pair of cutting wheels 251b' of the second cutting wheel set 251b. Then, after guiding the cutting line around a guide wheel 252b' in the second transition wheel set, it sequentially winds around a pair of cutting wheels 251c' of the third cutting wheel set 251c, forming a third cutting line segment L31 on the pair of cutting wheels 251c' of the third cutting wheel set 251c. Finally, after guiding the cutting line around a guide wheel 252c' in the third transition wheel set, it sequentially winds around a pair of cutting wheels 251d' of the fourth cutting wheel set 251d to form a fourth cutting line segment L41. Then, the cutting line sequentially passes through the guide wheels 253a, 253b, and 253c in the guide wheel set 253 to guide the cutting line from a pair of cutting wheels 251d' of the fourth cutting wheel set 251d on one side of the mounting frame 241 to another pair of cutting wheels 251d" of the fourth cutting wheel set 251d on the other side of the mounting frame 241. After the cutting line forms a fifth cutting line segment L42 on the other pair of cutting wheels 251d" of the fourth cutting wheel set 251d, it then passes through another guide wheel 252c" in the third transition wheel set to guide the cutting line and sequentially winds around another pair of cutting wheels 251c" of the third cutting wheel set 251c, forming a sixth cutting line segment L32 on the other pair of cutting wheels 251c" of the third cutting wheel set 251c. After passing through another guide wheel 252b" in the second transition wheel set to guide the cutting line, it sequentially winds around another pair of cutting wheels 251b" of the second cutting wheel set 251b, forming a seventh cutting line segment L22 on the other pair of cutting wheels 251b" of the second cutting wheel set 251b. Then, after passing through another guide wheel 252a" in the first transition wheel set to guide the cutting line, it sequentially winds around another pair of cutting wheels 251a" of the first cutting wheel set 251a, forming an eighth cutting line segment L12 and then exiting. Among them, the first cutting line segment L11 and the eighth cutting line segment L12 are the two cutting line segments of the first cutting wheel set, the second cutting line segment L21 and the seventh cutting line segment L22 are the two cutting line segments of the second cutting wheel set, the third cutting line segment L31 and the sixth cutting line segment L32 are the two cutting line segments of the third cutting wheel set, and the fourth cutting line segment L41 and the fifth cutting line segment L42 are the two cutting line segments of the fourth cutting wheel set. The two cutting line segments of each cutting wheel set are used to cut two parallel axial sections of the silicon rod to be cut.In this case, the wire cutting unit performs a downward pressing and cutting operation, and can simultaneously complete the cutting of two parallel-axis cutting surfaces of four silicon rods to be cut. In one squaring operation, two processes of two parallel-axis cutting surfaces need to be executed. After one cutting of two parallel-axis cutting surfaces is completed, the silicon rod carrier is rotated (rotated by 90 degrees) through the rotating mechanism of the silicon rod carrier to adjust the cutting surface of the silicon rod to be cut. It should be noted that in order to ensure that the squared silicon rod is in the shape of a cuboid as a whole, the horizontal distance between the wire grooves of the two pairs of cutting wheel sets of the cutting wheel group is less than or equal to the side length of the inscribed square of the cross-sectional circle of the silicon rod to be cut, so as to ensure that the intersection point of the cutting lines when the wire cutting unit performs two horizontal-axis cutting surfaces on the silicon rod is located within the cross-sectional circle of the silicon rod to be cut (including the case where the intersection point is on the circumference of the cross-sectional circle).

[0080] In one embodiment, please refer to Figure 2 , as shown in the figure, the wire cutting device further includes a wire take-up reel 255 and a wire pay-off reel 254 provided on the machine base 20, and the wire take-up reel 255 and the wire pay-off reel 254 are used for taking in and paying out the cutting wire during the squaring operation.

[0081] The above wire cutting device can be used to perform squaring cutting on the silicon rod to be cut to form a cut silicon rod and side skins. After the wire cutting device is used for a long time, the wire grooves around which the cutting wire is wound on the cutting wheel will be worn, affecting the cutting effect. Therefore, generally, multiple wire grooves are arranged on the cutting wheel of the wire cutting device, and a groove changing operation is required to rewind the cutting wire around other wire grooves of the cutting wheel. At this time, it is necessary to adjust the moving distance of the cutting wheel according to the groove distance between other wire grooves and the current wire groove.

[0082] In view of this, the multi-wire cutting equipment further includes an automatic groove changing mechanism. Please refer to Figure 12 and Figure 13 , Figure 12 which shows a schematic structural diagram of the automatic groove changing mechanism applied to the multi-wire cutting equipment in one embodiment in cooperation with the wire cutting device;

[0083] Figure 13Shown is a schematic cross-sectional structure of the automatic groove-changing mechanism applied to a multi-wire cutting device in an embodiment of the present application. As shown in the figure, in the embodiment, the automatic groove-changing mechanism 29 includes a cutting wheel 290, a groove-changing cylinder 292, and a positioning member 291. The cutting wheel includes a first wire groove and a second wire groove for winding a cutting wire. The groove-changing cylinder is linked with the cutting wheel 290 and is used to drive the cutting wheel 290 to move axially to move the cutting wire from one wire groove to an adjacent other wire groove. The groove-changing cylinder 292 includes a cylinder body and a first guide rail 293 and a second guide rail 294 that are opened on the cylinder body and communicate with each other. The drop between the first guide rail 293 and the second guide rail 294 corresponds to the groove pitch between the first wire groove and the second wire groove. The positioning member 291 is slidably disposed in the first guide rail 293 or the second guide rail 294 and is used to slide in the first guide rail 293 or the second guide rail 294 to drive the groove-changing cylinder 292 to rotate when the groove-changing cylinder 292 moves axially, so as to force the cutting wire on the cutting wheel 290 to switch from the first wire groove to the second wire groove.

[0084] Please refer to Figure 12 、 Figure 13 and Figure 14 , Figure 14 Shown as Figure 13 a partial enlarged view of part B of, the automatic groove-changing mechanism will be described in detail below by taking the cutting wheel including two wire grooves as an example.

[0085] The cutting wheel 290 includes a first wire groove and a second wire groove (not shown in the figure) for winding a cutting wire. In an embodiment, the cutting wheel 290 includes a first wire groove and a second wire groove. With Figure 13 the direction shown by the arrow in as the front and the direction opposite to the arrow as the rear, the cutting wire is initially wound on the first wire groove, and the second wire groove is located at the rear side of the first wire groove and is adjacent to the first wire groove.

[0086] The groove-changing cylinder 292 is linked with the cutting wheel 290 and is used to drive the cutting wheel 290 to move axially to move the cutting wire from one wire groove to an adjacent other wire groove. The groove-changing cylinder 292 includes a cylinder body and a first guide rail 293 and a second guide rail 294 that are opened on the cylinder body and communicate with each other. The drop between the first guide rail 293 and the second guide rail 294 corresponds to the groove pitch between the first wire groove and the second wire groove.

[0087] The positioning member 291 is slidably disposed in the first guide rail 293 or the second guide rail 294 and is used to slide in the first guide rail 293 or the second guide rail 294 to drive the groove-changing cylinder 292 to rotate when the groove-changing cylinder 292 moves axially, so as to force the cutting wire on the cutting wheel 290 to switch from the first wire groove to the second wire groove.

[0088] In one embodiment, the groove-changing cylinder 292 is disposed on the mounting bracket 241 of the aforementioned cutting frame 24. A positioning shaft (not shown) is provided at the front end of the groove-changing cylinder 292. The cutting wheel 290 is rotatably disposed on the positioning shaft through a bearing. When the groove-changing cylinder 292 moves axially, the cutting wheel 290 can be driven to move axially to move the cutting wire from the first wire groove to the second wire groove.

[0089] In one embodiment, the groove-changing cylinder 292 is driven by a driving device 295 to perform telescopic movement along its axis. The driving device 295 includes a cylinder assembly or a lead screw assembly driven by a motor. In this embodiment, the driving device 295 is set as a cylinder assembly. The cylinder assembly includes a cylinder and a telescopic rod driven by the cylinder. The rear end of the groove-changing cylinder 292 is disposed on the telescopic rod through a bearing, so that the groove-changing cylinder 292 can be pushed by the cylinder assembly to move axially and can also be rotated under force. However, this is not a limitation. In other embodiments, the driving device 295 can also be a lead screw assembly driven by a motor. The rear end of the groove-changing cylinder 292 is disposed on the lead screw assembly through a bearing. The motor drives the lead screw assembly to extend or retract, so that the groove-changing cylinder 292 moves axially and can also be rotated under force.

[0090] In order to achieve automatic groove changing, the moving distance of the cutting wheel 290 is adjusted to the groove pitch between the first wire groove and the second wire groove each time. Therefore, the drop H between the first guide rail 293 and the second guide rail 294 corresponds to the groove pitch between the first wire groove and the second wire groove. In one embodiment, the first guide rail 293 has a first landing end 2930, and the first landing end 2930 has a first distance from the first wire groove. The second guide rail 294 has a second landing end 2940, and the second landing end 2940 has a second distance from the second wire groove. The first distance is equal to the second distance. Thus, the drop H between the first guide rail 293 and the second guide rail 294 is equal to the groove pitch between the first wire groove and the second wire groove.

[0091] In order to facilitate the guiding positioning member 291 to relatively slide from the first landing end 2930 of the first guide rail 293 to the second landing end 2940 of the second guide rail 294 to achieve automatic groove changing, in the embodiment, there is a transition end 296 between the first landing end 2930 and the second landing end 2940.

[0092] In order to further facilitate the rapid sliding of the positioning member 291 from the first landing end 2930 to the transition end 296 and from the transition end 296 to the second landing end 2940, an upward section 297 is provided between the first landing end 2930 and the transition end 296 to provide an upward channel for the positioning member 291, and a downward section 298 is provided between the transition end 296 and the second landing end 2940 to provide a downward channel for the positioning member 291. In an embodiment, the upward section 297 is in a contracted state from the direction of the first landing end to the direction of the transition end, and the downward section 298 is in a contracted state from the direction of the transition end to the direction of the second landing end.

[0093] Preferably, in order to guide the positioning member 291 to slide quickly and accurately through the transition end 296, the transition end 296 has a first channel 2960 communicating with the upward section 297, the transition end 296 has a second channel 2961 communicating with the downward section 297, and the width of the first channel 2960 is smaller than that of the second channel 2961.

[0094] In order to prevent the positioning member 291 from slipping back at the transition end 296, that is, the positioning member 291 cannot smoothly slide along the first channel 2960 of the transition end 296 to the second channel 2961 of the transition end 296 and enter the downward section 298, but enters the upward section 297 from the first channel 2960 of the transition end 296 and returns to the first landing end 2930, resulting in the inability to achieve automatic groove change. In an embodiment, the vertex of the transition end 296 adjacent to the cutting wheel 290 is located in the second channel 2961, that is, it can be understood that the horizontal distance between the first channel 2961 and the cutting wheel 290 is greater than the horizontal distance between the second channel 2961 and the cutting wheel 290, so that the running state of the positioning member 291 sliding from the first channel 2960 to the second channel 2961 is an upward slope. When the groove-changing cylinder 292 moves backward along its axis, the positioning member 291 slides from the first channel 2960 to the second channel 2961 and drives the groove-changing cylinder 292 to rotate simultaneously to realize the switching of the positioning member from the first guide rail 293 to the second guide rail 294. Similarly, in order to prevent the positioning member 291 from not smoothly sliding to the upward section 297 at the first landing end 2920, the projection of the first landing end 2930 away from the vertex of the cutting wheel 290 is located within the upward section 297.

[0095] The positioning member 291 is fixedly connected to a fixed seat 299, and the fixed seat 299 is connected to the mounting bracket 241 of the wire cutting device of the multi-station cutting equipment, and is used to dispose the positioning member 291 in the first guide rail 293 or the second guide rail 294. In an embodiment, the fixed seat 299 is provided as a cover body sleeving the groove-changing cylinder 292, one end of the positioning member 299 is fixed on the cylinder wall of the groove-changing cylinder 292, and the other end extends into the first guide rail 293 or the second guide rail 294. When the groove-changing cylinder 292 is driven to move axially along it, the positioning member 291 slides in the first guide rail 293 or the second guide rail 294. However, the fixed seat 299 is not limited thereto. In other embodiments, the fixed seat 299 can also be provided as a fixed rod disposed in the groove-changing cylinder 292, one end of the positioning member 291 is connected to the outer wall of the fixed rod, and the other end extends into the first guide rail 293 or the second guide rail 294. When the groove-changing cylinder 292 is driven to move axially along it, the positioning member 291 slides in the first guide rail 293 or the second guide rail 294.

[0096] Please refer to Figures 15a to 15d , Figures 15a to 15d which shows a schematic structural diagram of the movement process of the automatic groove-changing mechanism of the multi-wire cutting equipment of the present application. As shown in the figure, the cutting wire is initially located in the first wire groove of the cutting wheel 290. Correspondingly, the positioning member 291 is located at the first landing end 2930 of the first guide rail 293 (shown as Figure 15a ). When the automatic groove-changing mechanism changes the groove, first drive the groove-changing cylinder 292 to move backward along its axis ( Figure 15a the arrow direction in ) so that the positioning member 291 enters the upward section 297 from the first landing 2930 and moves upward to the first channel 2960 of the transition end (shown as Figure 15b ). Then, drive the groove-changing cylinder 292 to continue to move backward along its axis so that the positioning member 291 cooperates with the transition end 296 to force the groove-changing cylinder 292 to rotate ( Figure 15b the arrow direction in ), so that the positioning member 291 slides from the first channel 2960 of the transition end to the second channel 2961 of the transition end (shown as Figure 15c ). Finally, drive the groove-changing cylinder 292 to move forward along its axis (such as Figure 15c the arrow direction in ) so that the positioning member 291 enters the downward section 298 from the second channel 2961 of the transition end and slides down to the second landing end 2940 (shown as Figure 15d ). In this way, the groove-changing cylinder 292 is moved forward along its axis by the distance of the groove pitch between the first wire groove and the second wire groove, so that the cutting wire is switched from the first wire groove to the second wire groove.

[0097] It should be noted that in the above embodiments, the cutting wheel includes two wire grooves, namely a first wire groove and a second wire groove, and the groove-changing cylinder is provided with two guide rails, namely a first guide rail and a second guide rail. However, the number of wire grooves included in the cutting wheel and the number of guide rails provided in the groove-changing cylinder are not limited thereto.

[0098] In other embodiments, the cutting wheel includes three wire grooves. For example, in addition to the first wire groove and the second wire groove in the above embodiments, the cutting wheel further includes a third wire groove, and the third wire groove is adjacent to the rear side of the second wire groove.

[0099] The number of guide rails provided in the groove-changing cylinder is consistent with the number of wire grooves and is set to three. For example, in addition to the first guide rail and the second guide rail in the above embodiments, the groove-changing cylinder further includes a third guide rail. The third guide rail communicates with the second guide rail, and the drop between the third guide rail and the second guide rail corresponds to the groove pitch between the second wire groove and the third wire groove. That is, the third guide rail has a third landing end, and the third landing end has a third distance from the third wire groove, and the third distance is equal to the second distance.

[0100] In order to facilitate the guiding positioning member to slide relatively from the second landing end of the second guide rail to the third landing end of the third guide rail to realize the switching of the cutting wire from the second wire groove to the third wire groove, in the embodiment, there is also a transition end between the second landing end and the third landing end. Similarly, there is an upward section between the second landing end and the transition end, and the upward section has a side wall with a first slope. There is a downward section between the transition end and the third landing end, and the downward section has a side wall with a second slope. In the embodiment, the upward section is in a contracted state from the direction of the second landing end to the direction of the transition end, and the downward section is in a contracted state from the direction of the transition end to the direction of the third landing end.

[0101] In order to guide the positioning member to slide quickly and accurately through the transition end, the transition end has a first channel communicating with the upward section and a second channel communicating with the downward section, and the width of the first channel is smaller than that of the second channel.

[0102] To prevent the positioning member from slipping back at the transition end, that is, the positioning member cannot smoothly slide along the first channel of the transition end to the second channel of the transition end and enter the downward section, but enters the upward section from the first channel of the transition end and returns to the second positioning end, resulting in the inability to move the cutting line from the second wire groove to the third wire groove. In an embodiment, the vertex of the transition end adjacent to the cutting wheel is located in the second channel. It can be understood that the horizontal distance between the first channel and the cutting wheel is greater than the horizontal distance between the second channel and the cutting wheel, so that the running state of the positioning member sliding from the first channel to the second channel is an upward slope. When the groove-changing cylinder moves backward along its axis, the positioning member slides from the first channel of the transition end to the second channel and drives the groove-changing cylinder to rotate simultaneously to achieve the switching of the positioning member from the second guide rail to the third guide rail. Similarly, to prevent the positioning member from not smoothly sliding to the transition end at the second positioning end, the projection of the second positioning end away from the vertex of the cutting wheel is located in the first channel.

[0103] However, it is not limited to this. In actual implementation forms, the wire grooves on the cutting groove can also be 4, 5, and so on. The cutting wheel can also include multiple wire grooves, and the groove-changing cylinder can also be provided with multiple interconnected guide rails that are consistent with the number of wire grooves. Of course, as the number of guide rails increases, the diameter of the groove-changing cylinder needs to be increased, which will not be elaborated here.

[0104] Generally, due to the relatively large self-weight of the silicon rod to be cut, it can be stably placed vertically on the silicon rod carrier by its own self-weight. However, during the subsequent silicon rod cutting operation, the silicon rod to be cut will be pulled by the cutting wire in the wire cutting unit and there will be risks such as disturbance, misalignment, and even overturning. To avoid the occurrence of the above various risks, a silicon rod pressing device that can perform lifting movement is further provided above the silicon rod carrier in the cutting area. The silicon rod pressing device is mounted on the lifting guide rail and is located above the wire cutting device. That is, the silicon rod pressing device and the wire cutting device share the same lifting guide rail. The silicon rod pressing device is used to press the top of the silicon rod to be cut when the wire cutting device cuts the silicon rod to be cut on the silicon rod carrier in the cutting area.

[0105] Please refer to Figure 16, which shows a schematic structural diagram of the multi-wire cutting equipment of the present application with a silicon rod pressing device in an embodiment. As shown in the figure, the silicon rod pressing device 26 includes a pressing bracket 260 and a pressing unit 261 provided on the pressing bracket and corresponding to the silicon rod bearing table 21 in the cutting area. A slider 262 cooperating with the lifting guide rail 242 is fixed on the pressing bracket 260. The pressing bracket 260 is erected on the support column 240 of the cutting machine frame 24 in a liftable manner through the cooperation of its slider 262 and the lifting guide rail 242 and is located above the wire cutting device. The pressing unit 261 is arranged on the pressing bracket 260 and can be lifted and lowered with the pressing bracket 260 to release or press the silicon rod to be cut on the silicon rod bearing table 21 in the cutting area.

[0106] Affected by the manufacturing process, the silicon rods to be cut on the silicon rod bearing table 21 in the cutting area are not completely consistent in height. The fact that the pressing unit 261 follows the pressing bracket 260 to descend cannot ensure that each pressing unit 261 tightly presses the silicon rod to be cut carried by its corresponding silicon rod bearing table 21. In view of this, the pressing unit 261 includes a pressing block 2610 and a driving structure for driving the pressing block to move up and down. In an embodiment, the driving structure is set as a cylinder assembly. The cylinder assembly includes a cylinder 2611 and a telescopic member 2612 connected to the cylinder. The pressing block 2610 is arranged at the bottom of the telescopic member 2612 (i.e., on the surface of the telescopic member 2612 facing the silicon rod bearing table 21 in the cutting area). The cylinder 2611 drives the telescopic member 2612 to drive the pressing block 2610 to move up and down to release or press the silicon rod to be cut on the silicon rod bearing table 21 in the cutting area.

[0107] In view of the fact that the silicon rod bearing table 21 has a rotating mechanism 210, which can drive the silicon rod to be cut thereon to rotate to adjust the cutting surface. In an embodiment, in order to cooperate with the rotating mechanism 210 of the silicon rod bearing table 21, the pressing block 2610 is connected to the driving structure through a rotating shaft (not shown). Specifically, a bearing (not shown) is arranged at the bottom of the telescopic member 2612 of the cylinder assembly. The pressing block 2610 has a rotating shaft adapted to the bearing. The pressing block 2610 is rotatably installed on the bearing of the telescopic member 2612 through the rotating shaft. In this way, when the pressing block 2610 presses the silicon rod to be cut, the silicon rod bearing table 21 drives the silicon rod to be cut to rotate, and the pressing block 2610 can also rotate in cooperation with the silicon rod to be cut.

[0108] In order to better protect the silicon rod to be cut, a buffer pad (not shown) can be arranged between the pressing block 2610 and the silicon rod to be cut. The buffer pad is fixed on the pressing surface of the pressing block 2610 (this pressing surface is the lower surface of the pressing block).

[0109] In order to simplify the structure of the multi-wire cutting device of the present application and reduce the manufacturing cost of the device, in one embodiment, the silicon rod pressing device 26 is attached to the mounting frame 241 for mounting the wire cutting unit by its own gravity and moves up and down along the lifting guide rail 242. The first driving mechanism drives the mounting frame 241 to drive the wire cutting unit 25 to descend along the lifting guide rail 242, and the silicon rod pressing device 26 attached to the mounting frame 241 also descends along the lifting guide rail 242 to the top of the silicon rod to be cut carried by the silicon rod supporting platform 21 in the cutting area, and the driving structure in the pressing unit 261 drives the pressing block 2610 to press the corresponding silicon rod to be cut, and the mounting frame 241 will continue to be driven by the first driving mechanism to descend with the wire cutting unit 25 to perform the cutting operation of the silicon rod to be cut. In order to prevent the silicon rod pressing device 26 from continuing to descend following the mounting frame 241 and damaging the silicon rod to be cut, a guide rail locking unit 263 is provided on the pressing bracket 260 of the silicon rod pressing device 26. The guide rail locking unit 263 is used to position the silicon rod pressing device 26 at a predetermined position on the lifting guide rail 242. For example, the predetermined position is that the pressing unit 261 in the silicon rod pressing device 26 is located 0 to 5 cm above the corresponding silicon rod to be cut, but it is not limited to this. As long as the pressing unit 261 is located above the corresponding silicon rod to be cut, the pressing block 2610 in the pressing unit 261 can be pressed against the top surface of the corresponding silicon rod to be cut when it is driven to descend.

[0110] In one embodiment, the guide rail locking unit 263 adopts a pneumatic guide rail locking device. Specifically, the pneumatic guide rail locking device in this embodiment includes a locking clamp matched with the lifting guide rail 242 and a cylinder driving the locking clamp to move. The locking clamp is arranged on the clamping bracket 260 in the silicon rod clamping device 26. When the silicon rod clamping device 26 and the mounting frame 241 are lowered to a predetermined position, the cylinder drives the locking clamp on the clamping bracket to hold the lifting guide rail 242 and position the silicon rod clamping device 26 at the predetermined position. The clamping unit 261 in the silicon rod clamping device 26 clamps the corresponding silicon rod to be cut, and the mounting frame 241 continues to be driven to drive the wire cutting unit 25 to descend to complete the cutting of the silicon rod to be cut. After completing the cutting operation of the silicon rod to be cut, the mounting frame 241 is driven by the first driving mechanism to drive the wire cutting unit 25 to rise to the position where the silicon rod clamping device 26 is located, and the cylinder drives the locking clamp on the clamping bracket 260 to release the lifting guide rail 242 so that the silicon rod clamping device 26 continues to be attached to the mounting frame 241 and rises.

[0111] In another embodiment, the silicon rod pressing device 26 is mounted on the lifting guide rail 242 and is driven by a second driving mechanism to move up and down along the lifting guide rail 242. The second driving mechanism is set as a cylinder assembly or a lead screw assembly driven by a motor. In practical applications, when the first driving mechanism drives the mounting frame 241 to carry the wire cutting unit 25 down, and the second driving mechanism drives the silicon rod pressing device 26 down to a predetermined position, the second driving mechanism stops driving the silicon rod pressing device 26 so that the silicon rod pressing device 26 is positioned at the predetermined position to press the silicon rod to be cut. Then, the first driving mechanism continues to drive the mounting frame 241 to carry the wire cutting unit 25 down to complete the cutting of the silicon rod to be cut. After completing the cutting operation of the silicon rod to be cut, the first driving mechanism drives the mounting frame 241 to carry the wire cutting unit 25 up, and the second driving mechanism drives the silicon rod pressing device 26 up.

[0112] In addition, considering the need to achieve complete cutting of the silicon rod to be cut and to avoid damage to the cutting wire due to obstruction, etc., in one embodiment, the silicon rod bearing table is a tabletop structure with a circular cross-section or a rectangular cross-section. The size of the bearing surface in the tabletop structure that contacts the silicon rod is larger than the cross-section of the squared silicon rod formed after the silicon rod to be cut is squared. Therefore, a cutting groove for the cutting wire segment to enter is provided on the tabletop structure. Specifically, four cutting grooves for the cutting wire segment to enter are provided on the tabletop structure. In this way, when the wire cutting device follows the mounting frame down, the cutting wire segment formed in the cutting device performs square cutting on the silicon rod to be cut carried by the silicon rod bearing table in the cutting area. When the cutting wire segment reaches the bottom of the silicon rod to be cut, it can continue to descend unobstructed until it penetrates the silicon rod to be cut, achieving complete cutting of the silicon rod to be cut. Of course, the structure of the silicon rod bearing table is not limited to this.

[0113] In other embodiments, the silicon rod bearing table is a tabletop structure with a rectangular cross-section. The size of the bearing surface in the tabletop structure that contacts the silicon rod is slightly smaller than the cross-section of the squared silicon rod formed after the silicon rod to be cut is squared. In this way, when the wire cutting unit in the wire cutting device follows the cutting machine frame to descend relative to the machine base, the cutting wire segment formed in the cutting unit performs square cutting on the silicon rod to be cut carried by the silicon rod bearing table in the cutting area. When the cutting wire segment reaches the bottom of the silicon rod to be cut, it can continue to descend unobstructed until it penetrates the silicon rod to be cut, achieving complete cutting of the silicon rod to be cut.

[0114] As described above, the silicon rod carrier is a table structure with a rectangular cross-section. The size of the bearing surface in the table structure that contacts the silicon rod is slightly smaller than the cross-section of the squared silicon rod formed after the silicon rod to be cut is squared. In this way, it can be ensured that the cutting line segments in the wire cutting unit can cut the silicon rod to be cut carried by the silicon rod carrier in the cutting area without obstruction. However, such a design also brings a problem: after the silicon rod to be cut on the silicon rod carrier in the cutting area completes the squaring cutting operation, the side skins formed after cutting may fall or overturn due to lack of corresponding support. Therefore, the multi-wire cutting equipment of the present application further includes a side skin supporting mechanism for supporting the side skins formed after the silicon rod to be cut is squared.

[0115] The side skin supporting mechanism disclosed in the present application is provided around the silicon rod carrier. After the wire cutting device makes a single cut on the silicon rod to be cut carried by the silicon rod carrier in the cutting area, side skins will be formed on the cut side surfaces. Therefore, in practical applications, a side skin supporting mechanism is respectively provided at the four sides around the silicon rod carrier with a rectangular cross-section table structure to support a corresponding side skin. Through the side skin supporting mechanism disclosed in the present application, the side skins formed after the silicon rod to be cut is squared by the wire cutting device can be supported, avoiding relative displacement between the side skins and the squared silicon rod, preventing the cutting line segments in the wire cutting device from chipping when passing through the silicon rod to be cut, and avoiding the side skins from falling and overturning, as well as the squared silicon rod being damaged by the touch of the side skins.

[0116] In one embodiment, refer to Figure 17 , which shows a schematic structural diagram of the side skin supporting mechanism of the multi-wire cutting equipment of the present application in one embodiment. As shown in the figure, the side skin supporting mechanism 27 includes a supporting member. The supporting member includes a base 270 connected to one side surface of the silicon rod carrier 21 and a top supporting portion 271 extending upward from the base. In this embodiment, the base 270 is set as a flat plate structure adapted to the side surface of the silicon rod carrier 21, but it is not limited thereto. The base 270 can also be set as a curved plate structure or other special-shaped structures. The top supporting portion 271 is set as two top columns located on both sides of the base 270. The height at which the top columns extend is the same as the height of the bearing surface of the silicon rod carrier 21. In practice, the top supporting portion 271 can also be a top plate or a top rod extending upward from the base 270. When the wire cutting device makes a square cut on the silicon rod to be cut on the silicon rod carrier 21, the supporting member can support the corresponding side skin, effectively preventing the cutting line segments in the wire cutting device from chipping when passing through the silicon rod to be cut, and avoiding the side skin from falling and overturning.

[0117] In another embodiment, the edge skin supporting mechanism includes a movable supporting member and a locking control member. In this embodiment, the movable supporting member includes a movable base connected to one side surface of the silicon rod bearing table, a supporting portion extending upward from the movable base, and a power generating structure for providing the up and down movement of the supporting portion. In one implementation, the movable base can be, for example, a flat plate structure adapted to the side surface of the silicon rod bearing table, but is not limited thereto. The movable base can also be, for example, a curved plate structure or other special-shaped structures. The supporting portion is at least two ejector rods extending upward from the movable base, but is not limited thereto. The supporting portion can also be, for example, a top plate or a top column extending upward from the movable base. The power generating structure includes two supporting feet provided at the movable base and two springs respectively sleeved on the two supporting feet, but is not limited thereto. The power generating structure can also adopt structures such as torsion springs and elastic sheets. By using the elastic force of the spring, the supporting feet and the connected ejector rods can move up and down relative to the silicon rod bearing table. In this embodiment, the locking control member is used to control the movable supporting member in a locked state when the movable supporting member abuts against the bottom of the silicon rod to be cut. In one implementation, the locking control member can be, for example, an electromagnetic lock. In the initial state, the ejector rod protrudes from the bearing surface of the silicon rod bearing table under the action of the supporting feet and the spring. When the silicon rod to be cut is placed, the ejector rod moves downward against the elastic force of the spring after being pressed by the silicon rod to be cut until the silicon rod to be cut is completely placed on the bearing surface of the silicon rod bearing table. At this time, the electromagnetic lock serving as the locking control member is energized and tightly adsorbs the movable base in the movable supporting member through the strong magnetic force generated by the principle of electro-magnetic induction, thereby controlling the ejector rod in a locked state. When the wire cutting device performs squaring cutting on the silicon rod to be cut carried by the silicon rod bearing table corresponding to the cutting area in the silicon rod conversion device, the movable supporting member in the locked state can support the corresponding edge skin, effectively preventing the cutting wire mesh in the wire cutting unit from chipping when passing through the silicon rod to be cut, and avoiding the edge skin from falling and tipping over, etc.

[0118] As can be seen from the above, after the silicon rod to be cut is subjected to squaring cutting, an edge skin will be formed. In order not to hinder the rising of the wire cutting device, it is necessary to unload the edge skin in a timely manner. For the unloading of the edge skin, the general edge skin unloading method mostly still requires the operator to manually operate to separate the edge skin from the squared silicon rod and carry it out of the silicon rod squaring equipment, which is not only inefficient, but also increases the risk of damage to the squared silicon rod due to the collision between the edge skin and the squared silicon rod during the handling process. In view of this, the multi-wire cutting equipment of the present application further includes an edge skin unloading device for unloading the edge skin formed after the wire cutting device performs squaring cutting on the silicon rod to be cut.

[0119] Please refer to Figure 18, which shows a schematic structural diagram of the edge skin lifting mechanism in an embodiment of the multi-wire cutting equipment of the present application. The edge skin discharging device 28 includes an edge skin lifting mechanism 280 for lifting the edge skin so that the top end of the edge skin 10 protrudes from the sawn silicon rod. The edge skin lifting mechanism 280 includes a jacking member 2800 provided on the mounting frame 241. The jacking member 2800 is driven by a telescopic member 2801 to perform telescopic movement. After the jacking member 2800 is controlled to perform an extending movement, it supports the bottom of the edge skin 10 to lift the edge skin 10.

[0120] In an embodiment, the jacking member 2800 includes a abutting plate and a supporting plate. The abutting plate extends upward from the bottom of the supporting plate. Further, the abutting plate can be an arc-shaped plate adapted to the arc surface of the edge skin 10. When the abutting plate abuts against the edge skin 10, it can be in full contact with the arc surface of the edge skin 10. The contact part of the abutting plate and the edge skin 10 is designed to be smooth or a buffer pad is added to the inner surface of the abutting plate that contacts the edge skin 10. The supporting plate is used to support the bottom of the edge skin 10. Further, the supporting plate can be a bow-shaped plate adapted to the bottom surface of the edge skin 10. In other embodiments, bumps can be added to the chord edge of the bow-shaped plate serving as the supporting plate to increase the contact area with the bottom surface of the edge skin 10.

[0121] In an embodiment, the telescopic member 2801 can be, for example, a cylinder with a telescopic rod. Among them, the telescopic rod can be connected to the supporting plate in the jacking member 2800 through a connecting structure. The cylinder can drive the telescopic rod to drive the jacking member 2800 to perform telescopic movement. Here, the telescopic movement of the jacking member 2800 includes the contraction movement and the extension movement of the jacking member 2800. Among them, the contraction movement of the jacking member 2800 specifically refers to the cylinder driving the telescopic rod to contract to drive the jacking member 2800 away from the edge skin 10, and the extension movement of the jacking member 2800 specifically refers to the cylinder driving the telescopic rod to extend to drive the jacking member 2800 close to the edge skin 10. Of course, the aforementioned telescopic member 2801 can also adopt other implementation manners. For example, the telescopic member 2801 can also be, for example, a servo motor with a lead screw. The lead screw is connected to the jacking member. The servo motor drives the lead screw to rotate to drive the connected jacking member 2800 to perform telescopic movement. For example, driving the lead screw to rotate forward drives the jacking member 2800 to perform a contraction movement and driving the lead screw to rotate reversely drives the jacking member 2800 to perform an extension movement, or driving the lead screw to rotate forward drives the jacking member 2800 to perform an extension movement and driving the lead screw to rotate reversely drives the jacking member 2800 to perform a contraction movement.

[0122] In practical applications, in the initial state, the telescopic rod drives the lifting member 2800 to be in a contracted state. The wire cutting unit 25 is driven to descend along with the mounting frame 241 so that the cutting lines formed by the respective cutting segments in the wire cutting unit 25 perform squaring cutting on the silicon rod to be cut located in the cutting area until the cutting segments penetrate through the silicon rod to be cut, completing a complete cutting of the silicon rod to be cut and forming the edge skin 10. At this time, the edge skin lifting mechanism 280 has descended to the bottom along with the wire mounting frame 241. The cylinder drives the telescopic rod to extend to drive the lifting member 2800 close to the edge skin 10 until the abutting plate in the lifting member 2800 contacts and abuts against the edge skin 10. Subsequently, the wire cutting unit 25 is driven to rise along with the mounting frame 241, and the edge skin lifting mechanism 280 rises along with the mounting frame 241, driving the edge skin 10 to have an upward displacement relative to the silicon rod that has been cut once, so that the top end of the edge skin 10 protrudes from the silicon rod to be cut. When the protruding part of the top end of the edge skin 10 compared to the silicon rod to be cut meets the set conditions, the mounting frame 241 can be controlled to stop rising. In this way, the top end of the edge skin can be used as the force-applying part for grasping, so that the edge skin is grasped and unloaded. Then, the cylinder drives the telescopic rod to contract to drive the lifting member 2800 back to the initial state, and at the same time controls the mounting frame 241 to drive the wire cutting unit 25 and the edge skin lifting mechanism 280 to continue rising above the silicon rod to be cut to prepare for the next cutting operation.

[0123] In other embodiments, the edge skin lifting mechanism may include a suction member and a telescopic member for driving the suction member to perform telescopic movement. The suction member is controlled by the telescopic member to abut against and adsorb the edge skin. The suction member may further include an abutting plate and an adsorption element. The abutting plate may be, for example, an arc-shaped plate adapted to the arc-shaped surface of the edge skin. When the abutting plate abuts against the edge skin, it can be in full contact with the arc-shaped surface of the edge skin. The adsorption element may be, for example, a vacuum chuck, and a plurality of vacuum chucks may be arranged on the contact surface of the abutting plate that is to contact the edge skin. The telescopic member may be, for example, a cylinder with a telescopic rod or a servo motor with a lead screw. Taking the cylinder with a telescopic rod as an example, the telescopic rod may be connected to the abutting plate in the lifting member through a connecting structure. The cylinder can drive the telescopic rod to contract to drive the abutting plate away from the edge skin, and the cylinder can drive the telescopic rod to extend to drive the abutting plate close to the edge skin and, after the abutting plate contacts the edge skin, the adsorption element adsorbs the edge skin. Subsequently, the mounting frame is driven to rise, the edge skin lifting mechanism and the wire cutting device rise along with the mounting frame, and the edge skin lifting mechanism can drive the edge skin to have an upward displacement relative to the silicon rod that has been cut once by using the adsorption force, so that the top end of the edge skin protrudes from the silicon rod that has been cut once.

[0124] It should be noted that since the multi-wire cutting device of the present application is provided with multiple cutting wheel sets for cutting multiple silicon rods to be cut simultaneously, multiple edge skin lifting mechanisms are provided on the mounting rack corresponding to the multiple cutting wheel sets to unload the edge skins of the multiple silicon rods that have undergone cutting operations simultaneously. When a pair of cutting wheels is provided in each cutting wheel set, one edge skin is formed by one downward pressing cut of the wire cutting device, and an edge skin lifting mechanism is provided above the pair of cutting wheels of each cutting wheel set on the mounting rack to timely unload the edge skin formed during the cutting operation. When two pairs of cutting wheels are provided in each cutting wheel set, two edge skins are formed by one downward pressing cut of the wire cutting device, and an edge skin lifting mechanism is provided above each of the two pairs of cutting wheels of each cutting wheel set on the mounting rack to timely unload the edge skin formed during the cutting operation.

[0125] The edge skin unloading device 28 further includes a clamping and transferring unit 281, which is arranged above the silicon rod bearing table 21 located in the cutting area, and is used for clamping the top end of the edge skin, lifting the edge skin to separate it from the squared silicon rod, and transferring the edge skin to the edge skin unloading area.

[0126] Please refer to Figure 2 , as shown in the figure, the clamping and transferring unit 281 includes a moving mechanism 283 that provides movement in at least one direction and an edge skin clamping mechanism 284. The edge skin clamping mechanism 284 is connected to the moving mechanism 283 and is driven to move in at least one direction.

[0127] In one embodiment, a support plate 282 for supporting the clamping and transferring unit 281 is spanned at the top ends of two opposite support columns 240 of the cutting machine frame 24. The clamping and transferring unit 281 is arranged on the support plate 282 and corresponds to the upper part of the silicon rod bearing table located in the cutting area.

[0128] In one embodiment, the edge skin clamping mechanism 284 can be set to multiple ones corresponding to the silicon rod bearing tables located in the cutting area one by one. In order to simplify the mechanism, reduce the manufacturing cost, and reduce the working energy consumption, in the embodiment, two adjacent edge skin clamping mechanisms 284 share a moving mechanism 283 that provides movement in at least one direction.

[0129] In one embodiment, refer to Figure 2 and Figure 19 , Figure 19 shown as Figure 2Partial enlarged view of part A, as shown in the figure. The moving mechanism 283 that moves in at least one direction is an X-direction moving mechanism. The X-direction moving mechanism includes an X-direction guide rail 2830, an X-direction slider 2831, and an X-direction driving source 2832. Among them, the X-direction guide rail 2830 is laid on the support plate 282. The X-direction slider 2831 is adapted to the X-direction guide rail 2830, and a mounting seat 2833 is arranged on the X-direction slider 2831. Two side skin clamping mechanisms 284 are respectively located on the left and right sides of the mounting seat 2833. The X-direction driving source 2832 can be, for example, an X-direction telescopic cylinder assembly or an X-direction motor. In order to enable the side skin clamping mechanism 284 to move smoothly in the X direction, a double guide rail design is adopted in this embodiment, that is, two X-direction guide rails 2830 are used, and these two X-direction guide rails 2830 are arranged in parallel along the X direction. In this way, the mounting seat 2833 on the X-direction slider 2831 driven by the X-direction driving source 2832 carries the two side skin clamping mechanisms 284 thereon and moves in the X direction along the X-direction guide rail 2830. In practical applications, the moving direction of the moving mechanism 283 is not limited to this. In other embodiments, the moving mechanism may further include a Y-direction moving mechanism and may further include a Z-direction moving mechanism.

[0130] Please refer to Figure 20 , Figure 20 which shows the external structure schematic diagram of the side skin clamping mechanism in an embodiment of the multi-wire cutting device of the present application. As shown in the figure, the side skin clamping mechanism 284 includes a lifting driving structure 2841 and a clamping component arranged at the bottom of the lifting driving structure. In the embodiment, the lifting driving structure 2841 is used to drive the clamping component to make a lifting motion. The lifting driving structure 2841 can be, for example, a lifting cylinder with a lifting rod, and the lifting rod is connected to the clamping component. The lifting cylinder can be used to control the telescopic movement of the lifting rod to drive the clamping component to make a lifting motion, but it is not limited to this. For example, the lifting driving structure can also be a lead screw assembly driven by a motor, and the lead screw assembly is connected to the clamping component. The motor is used to drive the lead screw assembly to lift to drive the clamping component to make a lifting motion.

[0131] Please refer to Figure 21 , Figure 21 which shows the cross-sectional structure schematic diagram of the clamping component in an embodiment of the multi-wire cutting device of the present application. As shown in the figure, the clamping component includes a cover body 2842 and a retractable clamping member. The retractable clamping member is arranged inside the cover body 2842, and a clamping space 2843 for clamping the side skin is formed between the clamping member and the cover body 2842. In the embodiment, the cover body 2842 is used to cover the side skin. The size that the cover body 2842 can be inserted into is slightly larger than the cross-sectional circle of the silicon rod to be cut. The cover body 2842 is set as a closed or non-closed circular cover, but it is not limited to this.

[0132] The structure of the clamping assembly is not limited thereto. In other embodiments, the clamping assembly includes an arc-shaped plate and a telescopic clamping member, and a clamping space for clamping the edge skin is formed between the clamping member and the arc-shaped plate.

[0133] As Figure 21 shown, the clamping member is a movable pressing block 2844 controlled by a cylinder 2845, and the movable pressing block 2844 is connected to the cylinder 2845 through a turning arm 2846. In the embodiment, the turning arm 2846 has a mounting portion and a first connecting portion and a second connecting portion respectively located on opposite sides of the mounting portion. Among them, the first connecting portion connects the piston rod 2848 of the cylinder 2845, and the second connecting portion connects the movable pressing block 2844.

[0134] In one embodiment, a base 2847 for carrying the clamping member is provided inside the cover 2842. The base 2847 carries the clamping member and extends into the concave area between the cut silicon rod and the edge skin. The cylinder 2845 is fixed on the side wall of the base 2847 and has a piston rod 2848. The mounting portion of the turning arm 2846 is hinged to a support seat 2849 fixed to the bottom of the base 2847 so that the turning arm 2846 can rotate up and down with the mounting portion as the axis. The movable pressing block 2844 is fixedly connected to the second connecting portion of the turning arm 2846. The first connecting portion of the turning arm 2846 is hinged to the piston rod 2848 of the cylinder. The cylinder 2845 pushes the piston rod 2848 to expand and contract to drive the first connecting portion of the turning arm 2846 to descend or ascend with the support seat 2849 as the center point, so that the second connecting portion of the turning arm 2846 ascends or descends with the support seat 2849 as the center point, so that the movable pressing block 2844 connected to the second connecting portion of the turning arm moves away from or approaches the cover 2842, and adjusts the clamping space 2843 between it and the cover 2842. Specifically, see Figure 21 , in the initial state, the second connecting portion of the turning arm 2846 is higher than its first connecting portion, and the movable pressing block 2844 is away from the cover 2842. When it is necessary to clamp the edge skin, the cylinder 2845 drives the piston rod 2848 to retract, thereby lifting the first connecting portion of the turning arm 2846 to rise with the support seat 2849 as the center point. The second connecting portion of the turning arm 2846 then descends with the support seat 2849 as the center point and drives the movable pressing block 2844 to approach the cover 2842 (as Figure 21(in the direction of the arrow in ), the clamping space 2843 between the movable pressing block 2844 and the cover body 2842 is reduced to clamp the edge skin. When it is necessary to release the edge skin, the air cylinder 2845 drives the piston rod 2848 to extend, so as to drive the first connecting part of the flipping arm 2846 to descend with the support seat 2849 as the center point, and the second connecting part of the flipping arm 2846 rises with the support seat 2849 as the center point, driving the movable pressing block 2844 away from the cover body 2842, that is, returning to the initial state, increasing the clamping space 2843 between the movable pressing block 2844 and the cover body 2842 to facilitate the release of the edge skin. In order to prevent the movable pressing block 2844 from contacting the edge skin during long-term clamping, causing wear and damage to each other, in an embodiment, the movable pressing block 2844 is provided with a buffer pad for contacting the edge skin.

[0135] It should be noted that, as described above, the wire cutting unit 24 includes a plurality of cutting wheel sets 251. In some embodiments, each cutting wheel set 251 includes a pair of cutting wheels. When using the pair of cutting wheels to perform cutting operations on the silicon rod to be cut, four single-axis surface cutting steps need to be performed. In this embodiment, the number of the clamping members is set to one. Perform the first single-axis surface cutting to form an edge skin, use one clamping member to clamp the edge skin, and then transfer the edge skin through the lifting drive structure 2841 and the X-direction moving mechanism. Then adjust the cutting surface of the silicon rod to be cut (for example, rotate 90 degrees), perform the second single-axis surface cutting to form another edge skin, use one clamping member to clamp the edge skin again, and then transfer the edge skin through the lifting drive structure 2841 and the X-direction moving mechanism. The edge skins formed by performing the third and fourth single-axis surface cuttings are transferred in the same way, which will not be elaborated here. In other embodiments, each cutting wheel set 251 includes two pairs of cutting wheels. When using the two pairs of cutting wheels to perform cutting operations on the silicon rod to be cut, two parallel-axis surface cuttings need to be performed. In this embodiment, the clamping members are set to two that are oppositely arranged. Perform the first two parallel-axis surface cuttings to form two edge skins, use two clamping members to clamp the two edge skins formed at the corresponding positions, and transfer the two edge skins through the lifting drive structure 2841 and the X-direction moving mechanism. Then adjust the cutting surface of the silicon rod to be cut (for example, rotate 90 degrees), perform the second two parallel-axis surface cuttings to form two edge skins again, use two clamping members to clamp the two edge skins formed at the corresponding positions again, and transfer the two edge skins through the lifting drive structure 2841 and the X-direction moving mechanism.

[0136] In one embodiment, the edge skin discharging device includes an edge skin conveying structure which is arranged in the edge skin unloading area and used for conveying the edge skins transported by the clamping and transferring unit. In one implementation manner, the edge skin conveying structure can be, for example, a conveyor belt. It is easy to understand that the edge skin unloading area is the area where the edge skins are unloaded in the multi-wire cutting equipment. Specifically, the edge skin unloading area is the area corresponding to the lower part of the clamping and transferring unit after it transports the edge skins away from the cutting area. In actual operation, the clamping and transferring unit transfers the edge skins from the cutting area to the edge skin unloading area. The clamping component in the clamping and transferring unit loosens to release the edge skins onto the conveyor belt serving as the edge skin conveying structure, and the conveyor belt conveys the edge skins out.

[0137] In another embodiment, the edge skin discharging device includes an edge skin barrel which is arranged in the edge skin unloading area. The opening of the edge skin barrel can be designed to be relatively large or in a flared shape, facilitating the unobstructed placement of the edge skins. Moreover, the height of the barrel wall of the edge skin barrel is also relatively high, which can ensure that the placed edge skins will not tip over, etc. Thus, the clamping and transferring unit moves the edge skins from the cutting area to the edge skin barrel, and then the operator can take out the edge skins from the edge skin barrel.

[0138] Certainly, the discharging of the edge skins formed after cutting the silicon rod to be cut is not limited to this. For example, in other implementation manners, the edge skin discharging device can include an edge skin barrel and an edge skin conveying structure at the same time. Among them, the edge skin conveying structure can be, for example, a conveyor belt, and the edge skin barrel is adjacent to the starting end of the conveyor belt (for example, the edge skin barrel is located beside the starting end of the conveyor belt or directly above the starting end of the conveyor belt, etc.). The opening of the edge skin barrel can be designed to be relatively large or in a flared shape, facilitating the unobstructed placement of the edge skins. Moreover, the height of the barrel wall of the edge skin barrel is also relatively high, which can ensure that the placed edge skins will not tip over, etc. In actual application, the edge skin barrel can be designed to be flipable. By flipping the edge skin barrel, the edge skins in the edge skin barrel can be smoothly transferred onto the conveyor belt. For example, a flip driving mechanism is arranged at the bottom of the edge skin barrel, and the flip driving mechanism can include a flip plate, a rotating shaft and a flip driving source (such as a flip motor or a flip cylinder, etc.). Thus, after the clamping and transferring unit transfers the edge skins from the cutting area into the edge skin barrel, the edge skin barrel flips to drive the edge skins in the barrel to be transferred onto the conveyor belt, and the conveyor belt conveys the edge skins out.

[0139] Through the multi-wire cutting equipment disclosed in the present application and the automatic groove-changing mechanism applied to the multi-wire cutting equipment, the cutting wheel is linked with the groove-changing cylinder. Only by driving the groove-changing cylinder to drive the cutting wheel to move axially along it can the cutting wire be moved from the first wire groove of the cutting wheel to the adjacent second wire groove. The whole automatic groove-changing process does not require manual participation and the automatic groove-changing operation is simple, which can ensure the accurate adjustment of the wire groove position and improve the operation efficiency.

[0140] The above embodiments are only illustrative of the principles and effects of the present application and are not intended to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present application should still be covered by the claims of the present application.

Claims

1. An automatic slot changing mechanism used in multi-wire cutting equipment, It is characterized in that include: The cutting wheel comprises a first wire groove and a second wire groove for winding a cutting wire; A slot changing cylinder is linked with the cutting wheel and is used to drive the cutting wheel to move along its axial direction so as to move the cutting line from the first line slot to the adjacent second line slot, comprising a cylinder body, and a first guide rail and a second guide rail which are connected to each other and are provided on the cylinder body, wherein the height difference between the first guide rail and the second guide rail corresponds to the slot distance between the first line slot and the second line slot; the first guide rail has a first landing end, and the first landing end has a first distance from the first line slot; the second guide rail has a second landing end, and the second landing end has a second distance from the second line slot; the first distance is equal to the second distance; A driving device, used for driving the slot changing cylinder to move telescopically along its axial direction; as well as A positioning member is fixedly connected to a fixed seat connected to the multi-wire cutting device, and can be relatively slidably arranged in the first guide rail or the second guide rail, and is used to slide in the first guide rail or the second guide rail to drive the groove changing cylinder to rotate when the groove changing cylinder moves axially, so as to force the cutting line on the cutting wheel to switch from the first wire groove to the second wire groove.

2. The automatic slot changing mechanism used in multi-wire cutting equipment according to claim 1, It is characterized in that A transition end is provided between the first landing end and the second landing end.

3. The automatic slot changing mechanism used in multi-wire cutting equipment according to claim 2, It is characterized in that An ascending section is provided between the first landing end and the transition end, and the ascending section has a side wall with a first slope; a descending section is provided between the transition end and the second landing end, and the descending section has a side wall with a second slope.

4. The automatic slot changing mechanism used in multi-wire cutting equipment according to claim 3, It is characterized in that The transition end has a first channel connected to the upward section, and the transition end has a second channel connected to the downward section, and the width of the first channel is smaller than the second channel.

5. The automatic slot changing mechanism used in multi-wire cutting equipment according to claim 4, It is characterized in that The transition end is located in the second channel adjacent to the apex of the cutting wheel.

6. The automatic slot changing mechanism used in multi-wire cutting equipment according to claim 1, It is characterized in that The driving device includes a cylinder assembly or a screw assembly driven by a motor.

7. The automatic slot changing mechanism used in multi-wire cutting equipment according to claim 1, It is characterized in that The fixing seat is configured as a cover body that sleeves the groove changing cylinder.

8. A multi-wire cutting device, It is characterized in that include: At least two silicon rod supporting platforms, used for supporting vertically placed single crystal silicon rods; as well as A wire cutting device, arranged above the silicon rod supporting platform, comprising a plurality of cutting wheels and a cutting wire wound around the plurality of cutting wheels to form at least one cutting line segment; The automatic slot changing mechanism according to any one of claims 1 to 7.

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