Double wire silicon rod cutting machine

Abstract

The present invention discloses a double-wire silicon rod cutting machine, comprising a frame, a retractable wire assembly, a gantry assembly and a support assembly, wherein the retractable wire assembly is arranged at one end of the frame, a working surface is arranged in the frame, a support assembly is arranged on the working surface, the gantry assembly is arranged on the working surface through a first moving assembly, the gantry assembly spans above the support assembly and reciprocates on the support assembly through the first moving assembly, a vertical cutting assembly, a first flip cutting wheel and a second flip cutting wheel are arranged on the gantry assembly, the retractable wire assembly is connected to the vertical cutting assembly through a cutting line, and the retractable wire assembly is connected to the first flip cutting wheel and the second flip cutting wheel through a cutting line. The present invention provides a double-wire silicon rod cutting machine which greatly improves the efficiency of silicon rod cutting, has reliable support and various cutting modes.

Description

Technical Field

[0001] The invention relates to the field of silicon rod cutting equipment, and more specifically to a double-wire silicon rod cutting machine. Background Art

[0002] The method of making single crystal silicon is usually to first make polycrystalline silicon or amorphous silicon, and then grow rod-shaped single crystal silicon from the melt by the Czochralski method or the floating zone melting method. The growth of the silicon rod forms a smooth sphere at one end and a sharp cone at the other end. When the molten elemental silicon solidifies, the silicon atoms are arranged into many crystal nuclei in a diamond lattice. If these crystal nuclei grow into grains with the same crystal plane orientation, these grains are combined in parallel to crystallize into single crystal silicon. Single crystal silicon is a relatively active non-metallic element and an important component of crystal materials. It is at the forefront of the development of new materials. Its main uses are as semiconductor materials and solar photovoltaic power generation and heating. The current silicon rod cutting device usually has a fixed position of the cutting device. Due to the pulling force of the retracting and releasing wire device, the cutting line in the silicon rod is an arc with low ends and high middle when the silicon rod is cut, which results in low cutting efficiency, rough cutting surface, and easy edge collapse.

[0003] Before using silicon wafers, the silicon rods need to be cut and tested. The grown silicon rods are irregular cylinders, so the clamping device for cutting the silicon rods is particularly important. The clamping devices on the market are mainly of the embracing type, which mainly fix the cylindrical silicon rods through clamps. However, due to the irregular cylindrical shape of the silicon rod chamber, sometimes some parts of the entire silicon rod are suspended in the air. When the silicon rod is cut, cracks will be caused inside the silicon rod when subjected to force, affecting the quality of the silicon wafers.

[0004] Since the surface of the silicon rod is not smooth and flat, the supporting block in the prior art can only partially support the silicon rod. Therefore, after the silicon rod is cut, the silicon rod will fall due to insufficient supporting surface, and the cut finished silicon rod will break, resulting in defective products.

[0005] Since the outer layer of the silicon rod contains more impurities, after cutting off the end of the silicon rod, it is necessary to remove the upper, lower, left and right edge skins of the silicon rod so that the silicon rod can be turned into a rectangular parallelepiped before further processing. In the existing technology, the silicon rod can only be cut horizontally or vertically, so it is necessary to cut off one side and then the other side, and then turn the silicon rod over to remove the edge skins on both sides again, so it needs to be cut 4 times. Due to the high hardness of the silicon rod, the length of the silicon rod is usually 3.5-4m, and the time to remove the edge skin on one side is 6-8 hours, which takes 24-32 hours as a whole. Therefore, the market urgently needs a cutting device that improves the cutting efficiency and effectively supports the silicon rod. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a double-wire silicon rod cutting machine which greatly improves the silicon rod cutting efficiency, has reliable support, and has various cutting modes.

[0007] According to one aspect of the present invention, a double-wire silicon rod cutting machine is provided, comprising a frame, a pay-off and retractable wire assembly, a gantry assembly and a support assembly, wherein the pay-off and retractable wire assembly is arranged at one end of the frame, a working surface is arranged in the frame, a support assembly is arranged on the working surface, the gantry assembly is arranged on the working surface via a first movable assembly, the gantry assembly spans above the support assembly and reciprocates on the support assembly via the first movable assembly, a vertical cutting assembly, a first flip cutting wheel and a second flip cutting wheel are arranged on the gantry assembly, the pay-off and retractable wire assembly is connected to the vertical cutting assembly via a cutting line, and the pay-off and retractable wire assembly is connected to the first flip cutting wheel and the second flip cutting wheel via a cutting line.

[0008] In some embodiments, the gantry assembly includes a gantry, a first drive assembly and a second drive assembly, the first drive assembly includes a first vertical moving part, a second vertical moving part, a motor and a synchronous belt, the first vertical moving part is arranged on one side of the gantry, and the second vertical moving part is arranged on the other side of the gantry, the motor simultaneously drives the first vertical moving part and the second vertical moving part through the synchronous belt, the first flip cutting wheel is installed on the first vertical moving part, the second flip cutting wheel is installed on the second vertical moving part, the first flip cutting wheel and the second flip cutting wheel are arranged in a mirror image, the second drive assembly is arranged on the top of the gantry, and the vertical cutting assembly is installed on the second drive assembly.

[0009] In some embodiments, the first flip cutting wheel includes: a mounting frame, a cutting wheel, a flipping portion and a limiting portion. The flipping portion is provided at the bottom of the mounting frame, and the cutting wheel is arranged on the mounting frame through the flipping portion. The flipping portion drives the cutting wheel to rotate around the flipping portion. The limiting portion is detachably connected to the mounting frame and the flipping portion. The limiting portion limits the position between the mounting frame and the flipping portion. The mounting frame is fixedly connected to the first vertical moving portion or the second vertical moving portion.

[0010] In some embodiments, the flipping part includes a rotating shaft, a bearing, and a positioning block. A mounting hole is provided at the top and bottom of the mounting frame. The rotating shaft is arranged in the mounting hole through the bearing. One end of the rotating shaft is placed in the mounting hole and the other end extends out of the mounting hole and is fixedly connected to the positioning block. A sealing member is provided at one end of the mounting hole away from the positioning block to prevent the mounting hole from being connected to the outside. The cutting wheel is installed on the positioning block. The positioning block includes a first positioning surface and a second positioning surface, and the first positioning surface is perpendicular to the second positioning surface.

[0011] In some embodiments, the limiting portion includes a positioning plate, a first bolt hole, a second bolt hole, a third bolt hole and a bolt, the first bolt hole is arranged on the mounting frame, the second bolt hole is arranged on the first positioning surface, and the third bolt hole is arranged on the second positioning surface, and the positioning plate limits the position of the first positioning surface on the mounting frame by the bolt or limits the position of the second positioning surface on the mounting frame by the bolt.

[0012] In some embodiments, a movable groove and a positioning hole are provided on the positioning plate, the bolt passes through the movable groove and is connected to the first bolt hole, the bolt passes through the positioning block and is connected to the second bolt hole or the third bolt hole to thereby limit the position of the first positioning surface or the second positioning surface, and a wire wheel is provided on the mounting frame.

[0013] In some embodiments, the structure of the first inverted cutting wheel is the same as the structure of the second inverted cutting wheel.

[0014] In some embodiments, the vertical cutting assembly includes: a first vertical cutting wheel and a second vertical cutting wheel, the first vertical cutting wheel and the second vertical cutting wheel are mounted on a second driving assembly, and the second driving assembly drives the first vertical cutting wheel and the second vertical cutting wheel to move closer to or away from each other.

[0015] In some embodiments, a plurality of transition wheels are provided on the gantry.

[0016] In some embodiments, a support assembly is provided on the gantry, including at least three groups of support parts, and the support parts are arranged on the working surface, and the support parts are arranged on the same straight line.

[0017] In some embodiments, the support portion includes two support rods with adjustable support heights.

[0018] The double-wire silicon rod cutting machine disclosed in the present invention utilizes a first driving component to simultaneously drive a first flip cutting wheel and a second flip cutting wheel to move simultaneously, thereby facilitating the cutting of silicon rods; utilizes a second driving component to drive a first vertical cutting wheel and a second vertical cutting wheel to move closer to or farther away from each other, thereby controlling the vertical cutting distance, and having a wider range of applications; utilizes a flip part to rotate the cutting wheel to adapt to different cutting modes; utilizes a limiting part to ensure the angle of rotation of the cutting wheel and facilitate adjustment, thereby having the beneficial effects of greatly improving silicon rod cutting efficiency, reliable support, and diverse cutting modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the double-wire silicon rod cutting machine of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the gantry assembly of the double-wire silicon rod cutting machine of the present invention;

[0021] Figure 3It is a schematic diagram of horizontal cutting by the first flip cutting wheel and the second flip cutting wheel of the double-wire silicon rod cutting machine of the present invention;

[0022] Figure 4 It is a schematic diagram of vertical cutting of the first flip cutting wheel and the second flip cutting wheel of the double-wire silicon rod cutting machine of the present invention;

[0023] Figure 5 This is a schematic diagram of horizontal cutting of the first flip cutting wheel of the double-wire silicon rod cutting machine of the present invention

[0024] Figure 6 yes Figure 5 Sectional view in the AA direction;

[0025] Figure 7 Schematic diagram of the vertical cutting state of the first flip cutting wheel of the double-wire silicon rod cutting machine of the present invention;

[0026] Figure 8 yes Figure 7 Cross-sectional view in the BB direction;

[0027] Fig. 9 It is a schematic diagram of the installation of the first driving assembly of the double-wire silicon rod cutting machine of the present invention;

[0028] Fig.10 It is a structural schematic diagram of the support assembly of the double-wire silicon rod cutting machine of the present invention;

[0029] Fig.11 Schematic diagram of cutting and chopping silicon rods in the first embodiment of the double-wire silicon rod chopping machine of the present invention;

[0030] Fig.12 It is a schematic diagram of cutting and chopping silicon rods in the second embodiment of the double-wire silicon rod chopping machine of the present invention. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and equivalent changes or substitutions in functions, methods or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meaning of the terms can be understood according to the specific circumstances.

[0033] like Figure 1As shown, the double-wire silicon rod cutting machine described in the present invention includes a frame 1, a pay-off and retractable wire assembly 2, a gantry assembly 3 and a support assembly 4, the pay-off and retractable wire assembly 2 is arranged at one end of the frame 1, a working surface 11 is arranged in the frame 1, and a support assembly 4 is arranged on the working surface 11, the gantry assembly 3 is arranged on the working surface 11 through a first moving assembly 5, the gantry assembly 3 spans above the support assembly 4 and reciprocates on the support assembly 4 through the first moving assembly 5, a vertical cutting assembly 6, a first flip cutting wheel 7 and a second flip cutting wheel 8 are arranged on the gantry assembly 3, the pay-off and retractable wire assembly 2 is connected to the vertical cutting assembly 6 through a cutting line, and the pay-off and retractable wire assembly 2 is connected to the first flip cutting wheel 7 and the second flip cutting wheel 8 through a cutting line.

[0034] like Figure 2 As shown, the gantry assembly 3 includes a gantry 31, a first drive assembly 32 and a second drive assembly 33, the first drive assembly 32 includes a first vertical moving part 321, a second vertical moving part 322, a motor 323 and a synchronous belt 324, the first vertical moving part 321 is arranged on one side of the gantry 31, and the second vertical moving part 322 is arranged on the other side of the gantry 31, the motor 323 simultaneously drives the first vertical moving part 321 and the second vertical moving part 322 through the synchronous belt 324, the first flip cutting wheel 7 is installed on the first vertical moving part 321, the second flip cutting wheel 8 is installed on the second vertical moving part 322, the first flip cutting wheel 7 and the second flip cutting wheel 8 are arranged in a mirror image, the second drive assembly 33 is arranged on the top of the gantry 31, and the vertical cutting assembly 6 is installed on the second drive assembly 33. By utilizing the first driving component 32 to simultaneously drive the first flip cutting wheel 7 and the second flip cutting wheel 8 to move simultaneously, the cutting of the silicon rod is facilitated; by utilizing the second driving component 33 to drive the first vertical cutting wheel 61 and the second vertical cutting wheel 62 to move closer to or away from each other, the vertical cutting distance is controlled, and the application range is wider; by utilizing the flipping part to rotate the cutting wheel, it is possible to adapt to different cutting modes; utilizing the limiting part to ensure the rotation angle of the cutting wheel and facilitate adjustment, it has the beneficial effects of greatly improving the silicon rod cutting efficiency, reliable support, and diverse cutting modes.

[0035] It should be noted that the gantry 31 needs to be driven by a driving component to perform cutting; if the gantry 31 cannot be moved, the cut silicon rods need to be moved.

[0036] like Fig. 9As shown, during the specific installation, the motor 323 is arranged on the top of the gantry 31, the first vertical moving part 321 is arranged on one side of the gantry 31, and the second vertical moving part 322 is arranged on the other side of the gantry 31. The first vertical moving part 321 and the second vertical moving part 322 have the same structure and adopt a screw linear rail transmission. A synchronous belt 324 wheel is provided on the top of the screw. The synchronous belt 324 is used to connect the synchronous belt 324 wheels on the first vertical moving part 321 and the second vertical moving part 322, so as to drive the first vertical moving part 321 and the second vertical moving part 322 simultaneously.

[0037] like Figure 5 and Figure 7 As shown, the first flip cutting wheel 7 includes a mounting frame 71, a cutting wheel 72, a flip part 73 and a limiting part 74. The bottom of the mounting frame 71 is provided with a flip part 73, and the cutting wheel 72 is arranged on the mounting frame 71 through the flip part 73. The flip part 73 drives the cutting wheel 72 to rotate around the flip part 73. The limiting part 74 is detachably connected to the mounting frame 71 and the flip part 73, and the limiting part 74 limits the position between the mounting frame 71 and the flip part 73. The cutting wheel 72 is rotated by using the flip part 73 to adapt to different cutting modes; the limiting part 74 is used to ensure the rotation angle of the cutting wheel 72 and is easy to adjust, which has the beneficial effects of greatly improving the silicon rod cutting efficiency, reliable support, and diversified cutting modes. The mounting frame 71 is fixedly mounted on the first vertical moving part 321 or the second vertical moving part 322 to ensure that the first flip cutting wheel 7 and the second flip cutting wheel 8 move simultaneously.

[0038] like Figure 6 and Figure 8 As shown, the flip part 73 includes a rotating shaft 731, a bearing 732, and a positioning block 733. The top and bottom of the mounting frame 71 are provided with a mounting hole 711. The rotating shaft 731 is arranged in the mounting hole 711 through the bearing 732. One end of the rotating shaft 731 is placed in the mounting hole 711 and the other end extends out of the mounting hole 711 and is fixedly connected to the positioning block 733. A sealing member 734 is provided at one end of the mounting hole 711 away from the positioning block 733 to block the mounting hole 711 from being connected to the outside. The cutting wheel 72 is installed on the positioning block 733. The rotating shaft 731 is used to smoothly rotate in the bearing 732 to drive the positioning block 733 to rotate. The cutting wheel 72 is driven to rotate, and the positioning block 733 is further used to cooperate with the limiting part 74 to ensure the rotation angle of the cutting wheel 72, so as to ensure the angle of horizontal and vertical cutting.

[0039] The positioning block 733 includes a first positioning surface 735 and a second positioning surface 736, and the first positioning surface 735 is perpendicular to the second positioning surface 736. The perpendicular relationship between the first positioning surface 735 and the second positioning surface 736 ensures that the positioning block 733 rotates at an angle of 90°.

[0040] The limiting part 74 includes a positioning plate 741, a first bolt hole 742, a second bolt hole 743, a third bolt hole 744 and a bolt. The first bolt hole 742 is arranged on the mounting frame 71, the second bolt hole 743 is arranged on the first positioning surface 735, and the third bolt hole 744 is arranged on the second positioning surface 736. The positioning plate 741 limits the position of the first positioning surface 735 on the mounting frame 71 by bolts or limits the position of the second positioning surface 736 on the mounting frame 71 by bolts. The positioning plate 741 is connected to the mounting frame 71 to ensure the position of the first positioning surface 735 and the second positioning surface 736, and further ensures that the angle of the cutting wheel 72 flipping after the first positioning surface 735 and the second positioning surface 736 rotate is 90°. Moreover, such a limiting method is simpler, so it will become more reliable in normal production.

[0041] The positioning plate 741 is provided with a moving groove 745 and a positioning hole 746. The bolt passes through the moving groove 745 and is connected to the first bolt hole 742. The bolt passes through the positioning block 733 and is connected to the second bolt hole 743 or the third bolt hole 744 to define the position of the first positioning surface 735 or the second positioning surface 736. The positioning hole 746 is preferably a semicircular hole arranged on the edge of the positioning plate 741. When the cutting wheel 72 needs to be turned over, the bolts in the first bolt hole 742 and the bolts in the second bolt hole 743 or the third bolt hole 744 are first loosened, and then the positioning plate 741 is pushed. When the bolts do not need to be completely removed, the positioning plate 741 is moved to the side away from the cutting wheel 72 until the positioning plate 741 does not interfere with the rotation of the positioning block 733. After the positioning hole 746 is rotated into place, the positioning hole 746 is pushed under the bolts, and all bolts are locked to complete the turning of the cutting wheel 72, which can further improve the efficiency of the turning of the cutting wheel 72.

[0042] The mounting frame 71 is provided with a wire passing wheel 75. The wire passing wheel 75 is used to facilitate the threading of the diamond cutting wire. Meanwhile, the wire retracting and releasing assembly 2 is an existing technology. In order to realize the first flip cutting wheel 7 and the second flip cutting wheel 8 and the first vertical cutting wheel 61 and the second vertical cutting wheel 62 to cut in two groups, the diamond cutting wire needs to be connected separately, and the wire retracting and releasing assembly 2 can also be provided with two groups.

[0043] The structure of the first flip cutting wheel 7 is the same as that of the second flip cutting wheel 8. The same structure between the two facilitates production and installation and is also to ensure that the cut diamond wires are in the same plane.

[0044] The vertical cutting assembly 6 includes: a first vertical cutting wheel 61 and a second vertical cutting wheel 62, the first vertical cutting wheel 61 and the second vertical cutting wheel 62 are installed on the second driving assembly 33, and the second driving assembly 33 drives the first vertical cutting wheel 61 and the second vertical cutting wheel 62 to move closer to each other or away from each other. By using the second driving assembly 33 to drive the first vertical cutting wheel 61 and the second vertical cutting wheel 62 to move closer to each other or away from each other, the distance of vertical cutting is controlled, and the application range is wider. Among them, the second driving assembly 33 usually adopts a transmission method of a bidirectional screw rod and a linear rail slider, and uses a motor 323 to drive a double-line screw rod, thereby realizing that the first vertical cutting wheel 61 and the second vertical cutting wheel 62 move closer to each other or away from each other to control the distance between the two vertical cutting lines.

[0045] A plurality of transition wheels 311 are provided on the gantry 31. The transition wheels 311 are utilized to facilitate the routing of the diamond cutting wire.

[0046] like Figure 3 As shown, when the first flip cutting wheel 7 and the second flip cutting wheel 8 perform horizontal cutting, after removing the end of the silicon rod, the first flip cutting wheel 7 and the second flip cutting wheel 8 can be used to horizontally cut the edge skin of the top of the silicon rod; at the same time, the first vertical cutting wheel 61 and the second vertical cutting wheel 62 can simultaneously cut off the edge skin on the left and right sides of the silicon rod; when performing horizontal cutting again, the first flip cutting wheel 7 and the second flip cutting wheel 8 horizontally cut the edge skin at the bottom of the silicon rod, and the first vertical cutting wheel 61 and the second vertical cutting wheel 62 process the silicon rod into 3 long cubes. According to this calculation, the prior art requires 6 separate cuts and takes 36-48 hours to complete the above steps. The present invention only requires two cuts to complete the cutting, which takes 12-16 hours, and the production efficiency is doubled, and energy consumption and production costs are saved.

[0047] like Figure 4 As shown, when the first flip cutting wheel 7 and the second flip cutting wheel 8 cut vertically, the first flip cutting wheel 7 and the second flip cutting wheel 8 are used to horizontally cut the two ends of the silicon rod for sampling and testing. In this state, the silicon rod can also be divided into shorter lengths.

[0048] like Fig.10As shown, the gantry is provided with a support assembly 4 including at least three groups of support parts, which are arranged on the working surface 11 and arranged on the same straight line. In order to facilitate the placement and support of silicon rods. The support part includes two support rods with adjustable support height. When supporting the silicon rod, first try to keep the two ends of the silicon rod at the same level. Due to the production method of the silicon rod, the silicon rod is not a regular cylinder, so it can only be roughly kept on the same plane; due to the large mass of the silicon rod, the middle of the silicon rod will deform downward after being supported at both ends, so finally adjust the middle support part so that the middle position of the silicon rod is also supported. The support rod can be a screw jack. The screw jack has no self-locking effect and is equipped with a brake. When the brake is released, the heavy object can be quickly lowered by itself, shortening the return time, but the structure of this jack is relatively complex. The screw jack can support heavy objects for a long time, and the maximum lifting weight has reached 100 t, which is widely used. After the horizontal screw is installed on the lower part, the heavy object can also be moved horizontally for a small distance. In order to facilitate the adjustment of the silicon rod.

[0049] Implementation method 1:

[0050] When the first flip cutting wheel 7 and the second flip cutting wheel 8 are cutting horizontally, the first flip cutting wheel 7 and the second flip cutting wheel 8 can be used to horizontally cut the edge skin of the top of the silicon rod after removing the end of the silicon rod. The first cutting is Fig.11 The implementation part in the above embodiment completely removes the edge skin of the upper, left and right sides of the silicon rod; after completing the first cutting, the first vertical moving part 321 and the second vertical moving part 322 drive the first flip cutting wheel 7 and the second flip cutting wheel 8 to move downward until they reach the specified position, and at the same time, the second driving component 33 drives the first vertical cutting wheel 61 and the second vertical cutting wheel 62 to move toward the middle, and then cuts, and the second cutting removes the edge skin at the bottom, and at the same time divides the silicon rod into three longer rectangular silicon rods, which is a process of cutting. Fig.11 Cut the dotted line part.

[0051] Implementation Method 2

[0052] When the first flip cutting wheel 7 and the second flip cutting wheel 8 are cutting vertically, the first flip cutting wheel 7 and the second flip cutting wheel 8 are used to horizontally cut the two ends of the silicon rod for sampling and testing. In this state, the silicon rod can also be divided into shorter lengths, such as Fig.12 Cut twice in the direction of the middle vertical line.

[0053] In actual production, the vertical and horizontal cutting methods of the first flip cutting wheel 7 and the second flip cutting wheel 8 are used in combination. Usually, the first flip cutting wheel 7 and the second flip cutting wheel 8 cut vertically, and firstly, the two ends of the silicon rod are sampled and tested; after the sampling is qualified, the first flip cutting wheel 7 and the second flip cutting wheel 8 are cut horizontally, and the first vertical cutting wheel 61 and the second vertical cutting wheel 62 can cut the edge skin on the left and right sides of the silicon rod at the same time; then the first flip cutting wheel 7 and the second flip cutting wheel 8 cut the edge skin at the bottom of the silicon rod horizontally, and the first vertical cutting wheel 61 and the second vertical cutting wheel 62 process the silicon rod into three long cubes; finally, the first flip cutting wheel 7 and the second flip cutting wheel 8 cut vertically, and cut it into a rectangular parallelepiped with a smaller length. The whole process only needs to flip the first flip cutting wheel 7 and the second flip cutting wheel 8, which greatly improves the work efficiency, saves the steps of multiple transfer, fixation and proofreading of the silicon rod, reduces the unpredictable loss of the silicon rod in these steps while ensuring the cutting accuracy, and also saves time and reduces the workload of the staff.

[0054] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, other modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. Double-wire silicon rod cutting machine, characterized in that: The machine comprises a frame, a wire-retracting assembly, a gantry assembly and a support assembly, wherein the wire-retracting assembly is arranged at one end of the frame, a working surface is arranged in the frame, a support assembly is arranged on the working surface, the gantry assembly is arranged on the working surface through a first moving assembly, the gantry assembly spans over the supporting assembly and reciprocates on the supporting assembly through the first moving assembly, a vertical cutting assembly, a first flip cutting wheel and a second flip cutting wheel are arranged on the gantry assembly, the wire-retracting assembly is connected to the vertical cutting assembly through a cutting line, and the wire-retracting assembly is connected to the first flip cutting wheel and the second flip cutting wheel through a cutting line; the gantry assembly comprises: a gantry , a first driving assembly and a second driving assembly, wherein the first driving assembly comprises a first vertical moving part, a second vertical moving part, a motor and a synchronous belt, the first vertical moving part is arranged on one side of the gantry, the second vertical moving part is arranged on the other side of the gantry, the motor drives the first vertical moving part and the second vertical moving part simultaneously through the synchronous belt, the first flip cutting wheel is installed on the first vertical moving part, the second flip cutting wheel is installed on the second vertical moving part, the first flip cutting wheel and the second flip cutting wheel are arranged in a mirror image, the second driving assembly is arranged on the top of the gantry, and the vertical cutting assembly is installed on the second driving assembly; The first flip cutting wheel comprises: a mounting frame, a cutting wheel, a flip part and a limiting part, the bottom of the mounting frame is provided with a flip part, the cutting wheel is arranged on the mounting frame through the flip part, the flip part drives the cutting wheel to rotate around the flip part, the limiting part is detachably connected to the mounting frame and the flip part, the limiting part defines the position between the mounting frame and the flip part, the mounting frame is fixedly connected to the first vertical moving part or the second vertical moving part; the flip part comprises a rotating shaft, a bearing, and a positioning block, the top and bottom of the mounting frame are provided with a mounting hole, the rotating shaft is arranged in the mounting hole through a bearing, one end of the rotating shaft is placed in the mounting hole and the other end extends out of the mounting hole and is fixedly connected to the positioning block, a sealing member is provided at one end of the mounting hole away from the positioning block to block the mounting hole from being connected to the outside, the cutting wheel is mounted on the positioning block, the positioning block comprises a first positioning surface and a second positioning surface, the first positioning surface is perpendicular to the second positioning surface; The limiting portion includes a positioning plate, a first bolt hole, a second bolt hole, a third bolt hole and a bolt, wherein the first bolt hole is arranged on the mounting frame, the second bolt hole is arranged on the first positioning surface, and the third bolt hole is arranged on the second positioning surface, and the positioning plate limits the position of the first positioning surface on the mounting frame by means of bolts or limits the position of the second positioning surface on the mounting frame by means of bolts; The positioning plate is provided with a movable groove and a positioning hole, the bolt passes through the movable groove and is connected to the first bolt hole, the bolt passes through the positioning block and is connected to the second bolt hole or the third bolt hole to thereby define the position of the first positioning surface or the second positioning surface, and the mounting frame is provided with a wire wheel.

2. The double-wire silicon rod cutting machine according to claim 1, characterized in that: The structure of the first flip cutting wheel is the same as that of the second flip cutting wheel.

3. The double-wire silicon rod cutting machine according to claim 2, characterized in that: The vertical cutting assembly comprises: a first vertical cutting wheel and a second vertical cutting wheel, wherein the first vertical cutting wheel and the second vertical cutting wheel are mounted on a second driving assembly, and the second driving assembly drives the first vertical cutting wheel and the second vertical cutting wheel to move closer to or away from each other.

4. The double-wire silicon rod cutting machine according to claim 2, characterized in that: The gantry is provided with a plurality of transition wheels.

5. The double-wire silicon rod cutting machine according to claim 1, characterized in that: The gantry is provided with a support assembly including at least three groups of support parts, the support parts are arranged on the working surface, and the support parts are arranged on the same straight line.

6. The double-wire silicon rod cutting machine according to claim 5, characterized in that: The support part comprises two support rods with adjustable support heights.

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