Cutting device of czochralski silicon guillotine shear

Abstract

The utility model provides a cutting device of a czochralski silicon guillotine shear. The cutting device comprises a driving wheel; the first wire guide wheel is arranged on one side of the driving wheel; the second wire guide wheel is arranged above the driving wheel; the third wire guide wheel is arranged above the second wire guide wheel; the tension wheel is arranged above the first wire guide wheel, and the height of the tension wheel can be adjusted; the diamond cutting wire is sequentially wound on the driving wheel, the second wire guide wheel / the third wire guide wheel, the tension wheel, the first wire guide wheel and the driving wheel to form a ring shape, and a crystal bar is cut off through the diamond cutting wire between the driving wheel and the first wire guide wheel. According to the cutting device of the czochralski silicon guillotine shear disclosed by the embodiment of the utility model, the use of diamond cutting lines with different lengths can be met, and the utilization rate of the diamond cutting lines is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon rod processing, in particular to a cutting device of a CZ silicon cutting machine. Background Art

[0002] In the photovoltaic field, silicon rod processing is firstly to use a segmentation machine to segment the silicon rod into small segments no longer than 850mm, and then use a squarer to cut each segment into rectangular rough rods, and finally use a grinder to polish the surface into the required size. The segmentation machine uses a circular diamond wire saw with a wire diameter of 0.38-0.5mm and a circumference of 2960mm. However, the circular diamond wires of the current segmentation machines are all of fixed circumference size and cannot be used for diamond wires of different circumference sizes.

[0003] There are two types of square cutting machines at present. One is a variable speed cutting device that uses a diamond wire with a wire diameter of 0.28-0.42mm and a length of 10km. The other is a constant force cutting device that uses a circular diamond wire saw with a wire diameter of 0.38-0.5mm and a circumference of 4100mm. Among them, the size of the square bar can be better controlled in the initial stage of constant force cutting than the size of the square bar in variable speed cutting. However, as the diamond of the steel wire wears, the cutting force of the steel wire is insufficient, resulting in the square bar size being very easy to exceed the standard, and the diamond wire needs to be replaced in time, which has a high production cost and low diamond wire utilization rate. Utility Model Content

[0004] In view of this, the utility model transforms the wiring of the segmenting machine so that the loop wire used by the segmenting machine can be adjusted to the same specification as the loop wire of the square opening machine to achieve the purpose of universal compatibility. When the gradient of the square rod opened by the square opening machine exceeds 700μm, the diamond wire is replaced and the old wire can be recycled to the segmenting machine for use, so that the utilization rate of the diamond wire is maximized, thereby achieving the purpose of reducing costs and increasing efficiency.

[0005] In order to solve at least one of the above technical problems, the utility model adopts the following technical solutions:

[0006] The cutting device of the CZ silicon cutting machine according to the embodiment of the utility model comprises:

[0007] Drive wheels;

[0008] a first wire wheel, the first wire wheel being arranged at one side of the driving wheel;

[0009] a second wire wheel, the second wire wheel being arranged above the driving wheel;

[0010] a third wire wheel, the third wire wheel being arranged above the second wire wheel;

[0011] A tension wheel, which is arranged above the first wire wheel and has an adjustable height.

[0012] Wherein, the first wire wheel and the tension wheel are arranged on the same side of the second wire wheel and the third wire wheel, and the driving wheel, the first wire wheel, the second wire wheel, the third wire wheel and the tension wheel are arranged on the same vertical plane;

[0013] A diamond cutting wire is sequentially wound around the driving wheel, the second wire wheel / the third wire wheel, the tension wheel, the first wire wheel and the driving wheel to form a ring, and the crystal rod is cut by the diamond cutting wire between the driving wheel and the first wire wheel.

[0014] Furthermore, the driving wheel and the first guide wheel are arranged at the same horizontal height.

[0015] Furthermore, the driving wheel and the second wire wheel have the same size, and a projection of the axis of the second wire wheel at a horizontal height of the axis of the driving wheel is located on a side of the axis of the driving wheel close to the first wire wheel.

[0016] Furthermore, the driving wheel and the third wire wheel have the same size, and a projection of an axis of the third wire wheel at a horizontal height of an axis of the driving wheel is located on a side of a projection of an axis of the second wire wheel at a horizontal height of an axis of the driving wheel away from the first wire wheel, and is located on a side of the axis of the driving wheel close to the first wire wheel.

[0017] Furthermore, the horizontal distance between the axes of the driving wheel and the first guide wheel is 730-820 mm.

[0018] Furthermore, the horizontal distance between the axes of the driving wheel and the second guide wheel is 200-210 mm, and the height difference between the axes is 500-530 mm.

[0019] The horizontal distance between the axes of the driving wheel and the third guide wheel is 60-70 mm, and the height difference between the axes is 990-1000 mm.

[0020] Furthermore, the second wire pulley and the third wire pulley are located on the same side of a vertical center line between the drive wheel and the first wire pulley, and the tension wheel can be adjusted to a symmetrical position of the second wire pulley relative to the vertical center line or to a symmetrical position of the third wire pulley relative to the vertical center line.

[0021] Furthermore, the surfaces of the driving wheel, the first wire wheel, the second wire wheel, the third wire wheel and the tension wheel are all provided with wire grooves, the opening of the wire grooves gradually increases from the groove bottom to the groove mouth, and the wire grooves include a first groove body, a second groove body and a third groove body in sequence from the groove bottom to the groove mouth on the axial cross section of the wheel,

[0022] The cross section of the first trough body is an isosceles right triangle, and the cross sections of the second trough body and the third trough body are isosceles trapezoids.

[0023] Furthermore, the inclination angle of the waist edge of the second trough body is 66° to 74°.

[0024] Furthermore, the inclination angle of the waist edge of the third trough body is 60° to 74°.

[0025] The above technical solution of the utility model has at least one of the following beneficial effects:

[0026] According to the cutting device of the CZ silicon cutter of the embodiment of the utility model, the circumference of the sleeved diamond cutting wire is adjusted by adjusting the position of the tension wheel, thereby meeting the use of diamond cutting wires of different lengths and improving the utilization rate of the diamond cutting wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a cutting device of a CZ silicon cutting machine according to an embodiment of the utility model;

[0028] Figure 2 This is a schematic structural diagram of a wire trough of a cutting device of a CZ silicon cutting machine according to an embodiment of the utility model.

[0029] Figure numerals: 1. driving wheel; 2. first wire wheel; 3. second wire wheel; 4. third wire wheel; 5. tension wheel; 6. diamond cutting wire; 7. wire groove; 71. first groove body; 72. second groove body; 73. third groove body. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0032] The following first describes in detail the cutting device of the CZ silicon cutting machine according to the embodiment of the utility model in conjunction with the accompanying drawings.

[0033] According to the cutting device of the CZ silicon cutting machine of the utility model, Figure 1 As shown, it may include: a driving wheel 1, a first wire wheel 2, a second wire wheel 3, a third wire wheel 4, a tension wheel 5 and a diamond cutting wire 6.

[0034] The first wire wheel 2 is arranged at one side of the driving wheel 1 .

[0035] The second wire wheel 3 is arranged above the driving wheel 1 .

[0036] The third wire wheel 4 is arranged above the second wire wheel 3 .

[0037] The tension wheel 5 is arranged above the first wire wheel 2 and its height is adjustable. It should be noted that the height adjustment of the tension wheel 5 is a common method used by people in the field, and the tension wheel 5 can be adjusted up and down by using a cylinder, an oil cylinder, a screw, etc., which is not specifically limited here. As an example, it can be adjusted along Figure 1 The driving wheel 5 is arranged above the first wire wheel 2 in an oblique upward direction from left to right, and its driving end is arranged below and connected to the tension wheel 5, and the height of the tension wheel 5 is adjusted by driving the cylinder to extend and retract. The driving wheel 5 can be flush with the second wire wheel 3, the driving wheel 5 can also be flush with the third wire wheel 4, the driving wheel 5 can also be located at any height between the second wire wheel 3 and the third wire wheel 4, or higher than the third wire wheel 4, or lower than the second wire wheel 3.

[0038] The first wire wheel 2 and the tension wheel 5 are arranged on the same side of the second wire wheel 3 and the third wire wheel 4, and the driving wheel 1, the first wire wheel 2, the second wire wheel 3, the third wire wheel 4 and the tension wheel 5 are arranged on the same vertical plane.

[0039] The diamond cutting wire 6 is sequentially wound around the driving wheel 1, the second wire wheel 3 / the third wire wheel 4, the tension wheel 5, the first wire wheel 2 and the driving wheel 1 to form a ring, and the crystal rod is cut by the diamond cutting wire 6 between the driving wheel 1 and the first wire wheel 2.

[0040] That is to say, according to the cutting device of the direct-pull silicon cutting machine of the embodiment of the utility model, a driving wheel 1 and a first wire wheel 2 are arranged at the bottom, and a second wire wheel 3 and a third wire wheel 4 are arranged in sequence from low to high on one side above the driving wheel 1 and the first wire wheel 2, and a height-adjustable tension wheel 5 is arranged on the other side above the driving wheel 1 and the first wire wheel 2. By adjusting the height position of the tension wheel 5, a diamond cutting wire 6 wire saw with a smaller circumference surrounded by the driving wheel 1, the first wire wheel 2, the second wire wheel 3 and the tension wheel 5 is formed, or a diamond cutting wire 6 wire saw with a larger circumference surrounded by the driving wheel 1, the first wire wheel 2, the third wire wheel 4 and the tension wheel 5 is formed. Thus, the use of diamond cutting wires of different lengths can be met, and then the long-length diamond cutting wire 6 replaced by the square opening machine can also meet the use of the cutting machine, thereby improving the utilization rate of the diamond cutting wire and reducing costs and increasing efficiency.

[0041] In some embodiments, Figure 1 As shown, the driving wheel 1 and the first wire wheel 2 are arranged at the same horizontal height.

[0042] By arranging the driving wheel 1 and the first wire wheel 2 at the same level, the diamond cutting wire 6 passing through the corresponding sections of the driving wheel 1 and the first wire wheel 2 can be more stable and reliable when cutting the silicon rod, thereby avoiding uneven cutting.

[0043] In some embodiments, Figure 1 As shown, the projection of the axis of the second wire wheel 3 at the horizontal height of the axis of the driving wheel 1 is located on the side of the axis of the driving wheel 1 close to the first wire wheel 2. In other words, the vertical projection of the second wire wheel 3 is located between the first wire wheel 2 and the driving wheel 1. The second wire wheel 3 and the driving wheel 1 have the same size.

[0044] Therefore, on the one hand, space is freed up to facilitate the subsequent third wire wheel 3 to set the diamond cutting wire 6 for normal work. On the other hand, when the diamond cutting wire 6 with a small circumference is set, the contact area between the diamond cutting wire 6 and the driving wheel 1 is larger, thereby improving the driving efficiency.

[0045] In some embodiments, Figure 1As shown, the projection of the axis of the third wire wheel 4 at the horizontal height of the axis of the driving wheel 1 is located on the side of the projection of the axis of the second wire wheel 3 at the horizontal height of the axis of the driving wheel 1 away from the first wire wheel 2, and is located on the side of the axis of the driving wheel 1 close to the first wire wheel 2. In other words, along the vertical direction, the axis of the third wire wheel 4 is located between the axis of the second wire wheel 3 and the axis of the driving wheel 1. The third wire wheel 4 and the driving wheel have the same size.

[0046] Therefore, in the working state of sleeved diamond cutting wire 6 with large circumference, there is no interference with the second wire wheel 3, and on the other hand, the transmission efficiency is higher.

[0047] Preferably, the horizontal distance between the axes of the driving wheel 1 and the first guide wheel 2 is 730-820 mm, for example, 730 mm, 750 mm, 770 mm, 800 mm or 820 mm.

[0048] Preferably, the horizontal spacing between the axes of the driving wheel 1 and the second guide wheel 3 is 200-210 mm, for example, 200 mm, 202 mm, 205 mm, 207 mm or 210 mm, and the axis height difference is 500-530 mm, for example, 500 mm, 505 mm, 510 mm, 515 mm, 520 mm, 525 mm or 530 mm.

[0049] The horizontal distance between the driving wheel and the third wire wheel 4 is 60-70 mm, such as 60 mm, 62 mm, 64 mm, 67 mm or 70 mm, and the height difference between the axes is 990-1000 mm, such as 990 mm, 992 mm, 994 mm, 996 mm, 998 mm or 1000 mm.

[0050] Therefore, when the driving wheel 1 drives each wire wheel through the diamond cutting wire 6, the transmission efficiency is good, the diamond cutting wire 6 cuts the crystal rod efficiently and stably, and the use cost of the diamond cutting wire 6 is also reduced to the greatest extent.

[0051] In some embodiments, the second wire wheel 3 and the third wire wheel 4 are located on the same side of the vertical center line between the driving wheel 1 and the first wire wheel 2, and the tension wheel 5 can be adjusted to a symmetrical position of the second wire wheel 3 relative to the vertical center line or a symmetrical position of the third wire wheel 4 relative to the vertical center line.

[0052] That is to say, the tension wheel 5 is adjustably arranged at an axially symmetrical position of the second wire wheel 3 or an axially symmetrical position of the third wire wheel 4 with the central axis of the line between the driving wheel 1 and the first wire wheel 2 as the symmetry axis, so that the diamond cutting wire 6 forms a ring wire saw transmission more reliably.

[0053] As an example, Figure 1 As shown, a fixed point o is taken as the rotation center, and a rotating shaft (not shown) is connected to point o, one end of the rotating shaft is connected to the tension wheel 5, and the distance from the tension wheel 5 to point o forms a tension arm, and the other end of the rotating shaft is connected to the output end of the cylinder, oil cylinder or screw to apply a torque. By driving the cylinder, oil cylinder or screw to extend and retract, the position and tension of the tension wheel 5 with point o as the center and the length of the tension arm as the rotation radius are adjusted, which is convenient and efficient, and can ensure the position accuracy of the tension wheel 5.

[0054] In some embodiments, Figure 2 As shown, the surfaces of the driving wheel 1, the first wire wheel 2, the second wire wheel 3, the third wire wheel 4 and the tension wheel 5 are all provided with wire grooves 7, the opening of the wire grooves 7 gradually increases from the groove bottom to the groove mouth, and the axial cross section of the wheel includes a first groove body 71, a second groove body 72 and a third groove body 73 from the groove bottom to the groove mouth.

[0055] The cross section of the first slot body 71 is an isosceles right triangle, and the cross sections of the second slot body 72 and the third slot body 73 are isosceles trapezoids.

[0056] Therefore, during operation, the diamond cutting wire 6 with different wire diameters can be passed through the wire groove 7 without being easily moved, thereby further ensuring the transmission efficiency. Preferably, the inclination angle of the waist edge of the second groove body 71 is 66°~74°, and the inclination angle of the waist edge of the third groove body 73 is 60°~74°, thereby making the diamond cutting wire reliably arranged in the wire groove 7, not easily deviated and separated, thereby making the cutting more stable.

[0057] As an example, the width of the top opening of the wire groove 7 can be set to 3mm, and the height from the bottom of the groove to the opening is set to 3mm. The wire groove 7 is divided into three parts from bottom to top, the height of the top opening of the cross section of the first groove body 71 is 0.21mm from its bottom corner, the width of the top opening of the cross section of the first groove body 71 is 0.21mm, the bottom angle of the cross section of the first groove body 71 is 45°, the height of the lower bottom edge of the cross section of the second groove body 72 is 1.29mm from the bottom corner of the first groove body 71, the width of the upper bottom edge of the cross section of the second groove body 72 is 1.29mm, the inclination angle of the waist edge of the cross section of the second groove body 72 is 67°, the height of the lower bottom edge of the cross section of the third groove body 73 (that is, the upper bottom edge of the cross section of the second groove body 71) from the bottom corner of the cross section of the first groove body 71 is 1.5mm, and the inclination angle of the waist edge of the cross section of the third groove body 73 is 64°.

[0058] In addition, a coating modified by nanomaterials may be coated on the inner side wall of the wire groove 7, thereby increasing the hardness and wear resistance of the inner side wall of the wire groove 7 and improving the service life of the wire wheel.

[0059] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A cutting device for a CZ silicon cutting machine, characterized in that: include: Drive wheels; a first wire wheel, the first wire wheel being arranged at one side of the driving wheel; a second wire wheel, the second wire wheel being arranged above the driving wheel; a third wire wheel, the third wire wheel being arranged above the second wire wheel; A tension wheel, which is arranged above the first wire wheel and has an adjustable height. Wherein, the first wire wheel and the tension wheel are arranged on the same side of the second wire wheel and the third wire wheel, and the driving wheel, the first wire wheel, the second wire wheel, the third wire wheel and the tension wheel are arranged on the same vertical plane; A diamond cutting wire is sequentially wound around the driving wheel, the second wire wheel / the third wire wheel, the tension wheel, the first wire wheel and the driving wheel to form a ring, and the crystal rod is cut by the diamond cutting wire between the driving wheel and the first wire wheel.

2. The cutting device of the CZ silicon cutting machine according to claim 1, characterized in that: The driving wheel and the first guide wheel are arranged at the same horizontal height.

3. The cutting device of the CZ silicon cutting machine according to claim 1, characterized in that: The driving wheel and the second wire wheel have the same size, and the projection of the axis of the second wire wheel at the horizontal height of the axis of the driving wheel is located on the side of the axis of the driving wheel close to the first wire wheel.

4. The cutting device of the CZ silicon cutting machine according to claim 3, characterized in that: The driving wheel and the third wire wheel have the same size, and a projection of the axis of the third wire wheel at a horizontal height of the axis of the driving wheel is located on a side of the projection of the axis of the second wire wheel at a horizontal height of the axis of the driving wheel away from the first wire wheel, and is located on a side of the axis of the driving wheel close to the first wire wheel.

5. The cutting device of the CZ silicon cutting machine according to claim 4, characterized in that: The horizontal distance between the axes of the driving wheel and the first guide wheel is 730-820 mm.

6. The cutting device of the CZ silicon cutting machine according to claim 4, characterized in that: The horizontal distance between the axis centers of the driving wheel and the second guide wheel is 200-210 mm, and the height difference between the axis centers is 500-530 mm. The horizontal distance between the axes of the driving wheel and the third guide wheel is 60-70 mm, and the height difference between the axes is 990-1000 mm.

7. The cutting device of the CZ silicon cutting machine according to claim 4, characterized in that: The second wire pulley and the third wire pulley are located on the same side of a vertical center line between the driving wheel and the first wire pulley, and the tension wheel can be adjusted to a symmetrical position of the second wire pulley relative to the vertical center line or a symmetrical position of the third wire pulley relative to the vertical center line.

8. The cutting device of the CZ silicon cutting machine according to claim 1, characterized in that: The surfaces of the driving wheel, the first wire wheel, the second wire wheel, the third wire wheel and the tension wheel are all provided with wire grooves, the opening of the wire grooves gradually increases from the groove bottom to the groove opening, and the axial cross section of the wheel includes a first groove body, a second groove body and a third groove body from the groove bottom to the groove opening, The cross section of the first trough body is an isosceles right triangle, and the cross sections of the second trough body and the third trough body are isosceles trapezoids.

9. The cutting device of the CZ silicon cutting machine according to claim 8, characterized in that: The inclination angle of the waist edge of the second trough body is 66° to 74°.

10. The cutting device of the CZ silicon cutting machine according to claim 8, characterized in that: The inclination angle of the waist edge of the third trough body is 60° to 74°.

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