A top tightening assembly and a wire entry method

Abstract

The application relates to the technical field of silicon rod processing, in particular to a top-tightening assembly and a wire feeding method, which comprises a top block and an auxiliary top-tightening device; the top block has a mounting surface in a first direction of the top block; a first top head and a second top head are slidably arranged on the mounting surface, and the sliding directions of the first top head and the second top head are parallel to the first direction; the auxiliary top-tightening device is located on one side of the top block along a second direction of the top block and close to the first top head; the first direction is perpendicular to the second direction; and the auxiliary top-tightening device has a movable end with a movable direction parallel to the first direction. The application can move a cutting wire into a clamping area of a silicon rod clamped by a squaring machine while ensuring stable clamping of the silicon rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silicon rod processing, and particularly relates to an upper clamping assembly and a threading method. BACKGROUND

[0002] Silicon crystals are widely used in the field of photovoltaic power generation. In order to meet the quality parameters of the silicon crystal rod and the shape and size of the next process, the silicon rod needs to be preliminarily processed by a square cutting machine, such as cutting a silicon rod with a circular cross section into a silicon rod with a square cross section. However, the current square cutting machine cannot move the cutting line into the clamping area of the square cutting machine to perform a half-cut operation on the silicon rod. SUMMARY

[0003] The present application solves the technical problem of providing an upper clamping assembly and a threading method that can move the cutting line into the clamping area of the square cutting machine while ensuring stable clamping of the silicon rod.

[0004] To solve the above technical problem, the technical solution adopted by the present application is as follows: an upper clamping assembly, comprising a top block and an auxiliary clamping device; the top block has a mounting surface in a first direction, the mounting surface is provided with a first top head and a second top head slidingly, and the sliding direction of the first top head and the second top head is parallel to the first direction.

[0005] The auxiliary clamping device is located on one side of the top block in a second direction and close to the first top head, the first direction is perpendicular to the second direction, and the auxiliary clamping device has a movable end with a movable direction parallel to the first direction.

[0006] To solve the above technical problem, another technical solution adopted by the present application is as follows:

[0007] A threading method based on the upper clamping assembly in the above solution, comprising the following steps: S1: the first top head abuts against the top surface of the silicon rod;

[0008] S2: the cutting line enters between the auxiliary clamping device and the first top head from below the movable end of the auxiliary clamping device;

[0009] S3: the movable end of the auxiliary clamping device abuts against the top surface of the silicon rod;

[0010] S4: the first top head moves away from the top surface of the silicon rod along the first direction;

[0011] S5: the cutting line enters between the first top head and the second top head from below the first top head.

[0012] The beneficial effect of the present application is that when the silicon rod is placed in the clamping area of the square opening machine, the first top head and the second top head of the top block and the movable end of the auxiliary top tightener abut against the top surface of the silicon rod, so as to fix the silicon rod in the clamping area of the square opening machine. During the wire feeding process, the movable end of the auxiliary top tightener is first separated from the top surface of the silicon rod, at this time, since the first top head and the second top head abut against the top surface of the silicon rod, the silicon rod will not be inclined; then the cutting wire can enter between the auxiliary top tightener and the first top head from below the movable end of the auxiliary top tightener; then the movable end of the auxiliary top tightener abuts against the top surface of the silicon rod again, and the first top head is separated from the top surface of the silicon rod, at this time, since the movable end of the auxiliary top tightener and the second top head abut against the top surface of the silicon rod, the silicon rod will not be inclined; then the cutting wire can enter between the first top head and the second top head from below the first top head (i.e. enter the clamping area of the square opening machine clamping the silicon rod), and finally the first top head abuts against the top surface of the silicon rod again, and the cutting wire can start the semi-splitting operation on the silicon rod. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of an upper top tightener assembly in a specific embodiment of the present application;

[0014] Figure 2 It is a bottom structure schematic view of an upper top tightener assembly in a specific embodiment of the present application;

[0015] Figure 3 It is a top block structure schematic view of an upper top tightener assembly in a specific embodiment of the present application;

[0016] Figure 4 It is a structure schematic view of the top block of an upper top tightener assembly in a specific embodiment of the present application;

[0017] Figure 5 It is an assembly cross-sectional structure schematic view of the first top head and the elastic member of an upper top tightener assembly on the top block in a specific embodiment of the present application;

[0018] Figure 6 It is an assembly cross-sectional structure schematic view of the second top head and the elastic member of an upper top tightener assembly on the top block in a specific embodiment of the present application;

[0019] Figure 7 It is an assembly cross-sectional structure schematic view of the third top head and the elastic member of an upper top tightener assembly on the top block in a specific embodiment of the present application;

[0020] REFERENCE NUMERALS:

[0021] 1, top block; 11, first top head; 12, second top head; 13, third top head; 131, notch; 14, elastic member;

[0022] 2, auxiliary top tightener; 3, sensor; 4, edge skin top tightener; 5, silicon rod. DETAILED DESCRIPTION

[0023] To make the technical contents of the present application, the purposes and effects achieved more clear, the following will be described in detail in combination with the embodiments and the accompanying drawings.

[0024] In the field of photovoltaic power generation, silicon crystal is widely used. In order to meet the quality parameters of the silicon crystal rod and the shape and size of the next process, the silicon rod 5 usually needs to be preliminarily processed by a square cutting machine, such as cutting the silicon rod 5 with a circular cross section into a silicon rod 5 with a square cross section. However, the current square cutting machine cannot move the cutting line into the clamping area of the square cutting machine to perform a half-split operation on the silicon rod 5.

[0025] Based on this, the present application provides an upper tightening assembly and a wire feeding method to solve the problem that the cutting line cannot be moved into the clamping area of the square cutting machine to perform a half-split operation on the silicon rod 5.

[0026] The first direction mentioned in the embodiments of the present application is the length direction of the top block 1, and the second direction is the radial direction of the top block 1.

[0027] Please refer to Figures 1 to 7 The upper tightening assembly of the present application comprises a top block 1 and an auxiliary top tightener 2. The top block 1 has a mounting surface along its first direction, and a first top head 11 and a second top head 12 are slidably arranged on the mounting surface, and the sliding direction of the first top head 11 and the second top head 12 is parallel to the first direction. The auxiliary top tightener 2 is located on one side of the top block 1 along its second direction and close to the first top head 11, the first direction is perpendicular to the second direction, and the auxiliary top tightener 2 has a movable end with a movable direction parallel to the first direction. Preferably, the auxiliary top tightener 2 adopts a pneumatic cylinder.

[0028] From the above description, the beneficial effects of the present application are that during the wire feeding process, the movable end of the auxiliary top tightener 2 is first separated from the top surface of the silicon rod 5 to create a passageway, so that the cutting line enters between the movable end of the auxiliary top tightener 2 and the first top head 11 from below. Since the first top head 11 and the second top head 12 abut against the top surface of the silicon rod 5, when the auxiliary top tightener 2 removes the pressure on the top surface of the silicon rod 5, the silicon rod 5 will be limited by the first top head 11, thereby avoiding the silicon rod 5 from being warped.

[0029] Then the movable end of the auxiliary top tightener 2 is re-pressed against the top surface of the silicon rod 5, and the first top head 11 is separated from the top surface of the silicon rod 5 to make a passage for the cutting line to enter between the first top head 11 and the second top head 12 (i.e. into the clamping area of the square cutting machine for clamping the silicon rod 5). Since the movable end of the auxiliary top tightener 2 is pressed against the top surface of the silicon rod 5, when the first top head 11 is removed from pressing the top surface of the silicon rod 5, the silicon rod 5 is limited by the movable end of the auxiliary top tightener 2, thereby avoiding the silicon rod 5 from being warped.

[0030] Please refer to Figure 5 and Figure 6 Further, the top block 1 is provided with elastic members 14 connected with the first top head 11 and the second top head 12 respectively, and the top block 1 has a full pressing state, a half pressing state and a non-pressing state. When the top block 1 is in the full pressing state, the first top head 11 and the second top head 12 compress the corresponding elastic members 14 and are pressed against the top surface of the silicon rod 5. When the top block 1 is in the half pressing state, the first top head 11 does not compress the corresponding elastic member 14, the second top head 12 compresses the corresponding elastic member 14, and the second top head 12 is pressed against the top surface of the silicon rod 5. When the top block 1 is in the non-pressing state, the first top head 11 and the second top head 12 do not compress the corresponding elastic members 14 and are separated from the top surface of the silicon rod 5.

[0031] As described above, when the cutting line enters between the auxiliary top tightener 2 and the first top head 11 and the cutting line is in the half cutting operation, the top block 1 is in the full pressing state to ensure the stability of the silicon rod 5. When the cutting line enters between the first top head 11 and the second top head 12, the top block 1 is in the half pressing state. When the silicon rod 5 needs to be put into or taken out of the clamping area of the square cutting machine for clamping the silicon rod, the top block 1 is in the non-pressing state.

[0032] In an alternative embodiment, the maximum extension of the first top head 11 on the top block 1 is 7mm, the maximum extension of the second top head 12 on the top block 1 is 12mm, and when the top block 1 is in the full pressing state, the extensions of the first top head 11 and the second top head 12 on the top block 1 are equal and the extension is 1-2mm. During the process of the cutting line entering between the first top head 11 and the second top head 12, the top block 1 is first moved away from the silicon rod 5 in the first direction to let the first top head 11 reach the maximum extension of 7mm on the top block 1 and be pressed against the top surface of the silicon rod 5, and let the second top head 12 reach the extension of 7mm on the top block 1 and be pressed against the top surface of the silicon rod 5, and then the top block 1 is continuously moved away from the silicon rod 5 in the first direction by 3mm-4mm to separate the first top head 11 from the top surface of the silicon rod 5 to make a passage for the cutting line to pass through.

[0033] Please refer to Figure 7As shown, further, the top block 1 is provided with a third top head 13 on one end face of the first direction of the top block 1, and the third top head 13 is located between the first top head 11 and the second top head 12. The top block 1 is provided with an elastic member 14 connected with the third top head 13. When the top block 1 is in a full compression state, the third top head 13 compresses the corresponding connected elastic member 14 and abuts against the top face of the silicon rod 5. When the top block 1 is in a half compression state, the third top head 13 compresses the corresponding connected elastic member 14 and abuts against the top face of the silicon rod 5. When the top block 1 is in a non-compression state, the third top head 13 does not compress the corresponding connected elastic member 14 and is separated from the top face of the silicon rod 5. When the top block 1 is in a full compression state, the third top head 13 has the same extension amount from the top block 1 as the second top head 12. When the top block 1 is in a half compression state, the third top head 13 has the same extension amount from the top block 1 as the second top head 12. When the top block 1 is in a non-compression state, the third top head 13 has the same extension amount from the top block 1 as the second top head 12.

[0034] As described above, the third top head 13 and the second top head 12 abutting against the top face of the silicon rod 5 can further improve the stability of the silicon rod 5 in the full compression state and the half compression state of the top block 1.

[0035] Please refer to Figure 3 As shown, further, the first top head 11 and the second top head 12 are symmetrically arranged on both sides of the center line of the mounting surface, and the third top head 13 is arranged on the center line of the mounting surface. The third top head 13 is provided with a notch 131 facing the first top head 11 on one end away from the top block 1.

[0036] As described above, the first top head 11 and the second top head 12 abutting against the opposite two sides of the top of the silicon rod 5, and the third top head 13 abutting against the middle position of the top of the silicon rod 5, can maximize the stability of the silicon rod 5 in the clamping area of the silicon rod clamped by the square cutting machine. And the third top head 13 is provided with a notch 131 to provide more movement space for the cutting line and improve the flexibility of the cutting position in the clamping area of the silicon rod clamped by the square cutting machine.

[0037] Further, the top block 1 is provided with drivers (not shown in the figure) connected with the first top head 11 and the second top head 12 respectively, and the top block 1 has a full pressing state, a half pressing state and a non-pressing state; when the top block 1 is in the full pressing state, the driver connected with the first top head 11 drives the first top head 11 to abut against the top surface of the silicon rod, and the driver connected with the second top head 12 drives the second top head 12 to abut against the top surface of the silicon rod; when the top block 1 is in the half pressing state, the driver connected with the first top head 11 drives the first top head 11 to separate from the top surface of the silicon rod, and the driver connected with the second top head 12 drives the second top head 12 to abut against the top surface of the silicon rod; when the top block 1 is in the non-pressing state, the driver connected with the first top head 11 drives the first top head 11 to separate from the top surface of the silicon rod, and the driver connected with the second top head 12 drives the second top head 12 to separate from the top surface of the silicon rod. Preferably, the driver is a pneumatic cylinder or an electric motor.

[0038] As can be seen from the above description, when the cutting line enters between the auxiliary top tightener 2 and the first top head 11 and the cutting line performs the half-split operation, the top block 1 is in the full pressing state to ensure the stability of the silicon rod 5. When the cutting line enters between the first top head 11 and the second top head 12, the top block 1 is in the half pressing state. When it is necessary to put the silicon rod 5 into or take the silicon rod out of the clamping area of the silicon rod clamping device of the squaring machine, the top block 1 is in the non-pressing state.

[0039] In an alternative embodiment, the maximum extension of the first top head 11 on the top block 1 is 7 mm, the maximum extension of the second top head 12 on the top block 1 is 12 mm, and when the top block 1 is in the full pressing state, the extensions of the first top head 11 and the second top head 12 on the top block 1 are equal and the extension is 1-2 mm. During the process that the cutting line enters between the first top head 11 and the second top head 12, the top block 1 is first moved away from the silicon rod 5 along the first direction to allow the first top head 11 to reach the maximum extension of 7 mm on the top block 1 and abut against the top surface of the silicon rod 5, and allow the second top head 12 to reach the extension of 7 mm on the top block 1 and abut against the top surface of the silicon rod 5, and then the top block 1 is continuously moved away from the silicon rod 5 along the first direction by 3-4 mm to separate the first top head 11 from the top surface of the silicon rod 5 to provide a passageway for the cutting line.

[0040] Further, the top block 1 is provided with a third top head 13 on one end surface of the first direction of the top block 1, and the third top head 13 is located between the first top head 11 and the second top head 12, and the top block 1 is provided with a driver (not shown in the figure) connected with the third top head 13; when the top block 1 is in a full pressing state, the driver connected with the third top head 13 drives the third top head 13 to abut against the top surface of the silicon rod; when the top block 1 is in a half pressing state, the driver connected with the third top head 13 drives the third top head 13 to abut against the top surface of the silicon rod; when the top block 1 is in a non-pressing state, the driver connected with the third top head 13 drives the third top head 13 to separate from the top surface of the silicon rod. Wherein, when the top block 1 is in a full pressing state, the third top head 13 has the same extension amount on the top block 1 as the second top head 12, when the top block 1 is in a half pressing state, the third top head 13 has the same extension amount on the top block 1 as the second top head 12, and when the top block 1 is in a non-pressing state, the third top head 13 has the same extension amount on the top block 1 as the second top head 12.

[0041] As can be seen from the above description, the third top head 13 and the second top head 12 abut against the top surface of the silicon rod 5, which can further improve the stability of the silicon rod 5 in the full pressing state, the half pressing state and the non-pressing state of the top block 1.

[0042] Further, the first top head 11 and the second top head 12 are symmetrically arranged on both sides of the center line of the mounting surface, and the third top head 13 is arranged on the center line of the mounting surface, and the third top head 13 is provided with a notch 131 facing the first top head 11 on the end away from the top block 1.

[0043] As can be seen from the above description, the first top head 11 and the second top head 12 abut against the opposite two sides of the top of the silicon rod 5 respectively, and the third top head 13 abuts against the middle position of the top of the silicon rod 5, which can maximize the stability of the silicon rod 5 in the clamping area of the silicon rod clamped by the square cutting machine. And the third top head 13 is provided with a notch 131, which can provide more moving space for the cutting line and improve the flexibility of the cutting position in the clamping area of the silicon rod clamped by the square cutting machine.

[0044] Please refer to Figure 1 and Figure 2 , an upper pressing assembly further comprises a sensor 3, and the detection end of the sensor 3 faces the end of the first top head 11 away from the top block 1, or the end of the second top head 12 away from the top block 1, or the end of the third top head 13 away from the top block 1.

[0045] As can be seen from the above description, when the sensor 3 judges that each top head of the top block 1 has approached the silicon rod 5, the square cutting machine can slow down the speed of the top block 1 approaching the silicon rod 5 through a signal, so as to avoid that the speed of the top block 1 approaching the silicon rod 5 is too large.

[0046] Referring to Figure 1 and Figure 2 Fig. 1, an upper tightening assembly further comprises a plurality of side skin tighteners 4 located at the side edges of the top block 1, the side skin tighteners 4 having movable ends moving in a direction parallel to the first direction.

[0047] As can be seen from the above description, when it is necessary to cut the side skin of the silicon rod 5 to cut the cylindrical silicon rod 5 into a rectangular silicon rod 5, the top of the side skin portion to be cut of the silicon rod 5 is pressed by the movable end of the side skin tightener 4.

[0048] The method for feeding a wire according to the present application comprises the following steps: S1, moving the movable end of the auxiliary tightener 2 away from the top surface of the silicon rod 5 along the first direction;

[0049] S2, the cutting wire enters between the auxiliary tightener 2 and the first top head 11 from below the movable end of the auxiliary tightener 2;

[0050] S3, moving the movable end of the auxiliary tightener 2 along the first direction to abut against the top surface of the silicon rod 5;

[0051] S4, moving the first top head 11 along the first direction to move away from the top surface of the silicon rod 5;

[0052] S5, the cutting wire enters between the first top head 11 and the second top head 12 from below the first top head 11;

[0053] S6, moving the first top head 11 along the first direction to abut against the top surface of the silicon rod 5.

[0054] Embodiment one

[0055] Referring to Figures 1 to 7As shown, an upper tightening assembly includes a top block 1 and an auxiliary upper tightening device 2; the top block 1 has a mounting surface along a first direction of itself, a first head 11 and a second head 12 are slidably arranged on the mounting surface, and the sliding directions of the first head 11 and the second head 12 are parallel to the first direction; the auxiliary upper tightening device 2 is located on a side of the top block 1 along a second direction of itself and close to the first head 11, the first direction is perpendicular to the second direction, and the auxiliary upper tightening device 2 has a movable end with a movable direction parallel to the first direction. The top block 1 is provided with elastic members 14 connected with the first head 11 and the second head 12 respectively, and the top block 1 has a full compression state, a half compression state and a non-compression state; when the top block 1 is in the full compression state, the first head 11 and the second head 12 compress the corresponding connected elastic members 14 respectively and abut against the top surface of a silicon rod 5; when the top block 1 is in the half compression state, the first head 11 does not compress the corresponding connected elastic member 14, the second head 12 compresses the corresponding connected elastic member 14, and the second head 12 abuts against the top surface of the silicon rod 5; when the top block 1 is in the non-compression state, the first head 11 and the second head 12 do not compress the corresponding connected elastic members 14 and are separated from the top surface of the silicon rod 5. A third head 13 is slidably arranged on an end surface of the top block 1 along the first direction of itself, and the third head 13 is located between the first head 11 and the second head 12, and the top block 1 is provided with an elastic member 14 connected with the third head 13; when the top block 1 is in the full compression state, the third head 13 compresses the corresponding connected elastic member 14 and abuts against the top surface of the silicon rod 5; when the top block 1 is in the half compression state, the third head 13 compresses the corresponding connected elastic member 14 and abuts against the top surface of the silicon rod 5; when the top block 1 is in the non-compression state, the third head 13 does not compress the corresponding connected elastic member 14 and is separated from the top surface of the silicon rod 5. The first head 11 and the second head 12 are symmetrically arranged on both sides of the center line of the mounting surface, the third head 13 is arranged on the center line of the mounting surface, and a notch 131 facing the first head 11 is arranged on the end of the third head 13 away from the top block 1.

[0056] Embodiment Two

[0057] In this embodiment, the elastic members 14 arranged in the top block 1 in Embodiment One are replaced by drivers, which are as follows:

[0058] The top block 1 is provided with a driver (not shown in the figure) connected with the first top head 11 and the second top head 12 respectively, and the top block 1 has a full pressing state, a half pressing state and a non-pressing state; when the top block 1 is in the full pressing state, the driver connected with the first top head 11 drives the first top head 11 to abut against the top surface of the silicon rod, and the driver connected with the second top head 12 drives the second top head 12 to abut against the top surface of the silicon rod; when the top block 1 is in the half pressing state, the driver connected with the first top head 11 drives the first top head 11 to separate from the top surface of the silicon rod, and the driver connected with the second top head 12 drives the second top head 12 to abut against the top surface of the silicon rod; when the top block 1 is in the non-pressing state, the driver connected with the first top head 11 drives the first top head 11 to separate from the top surface of the silicon rod, and the driver connected with the second top head 12 drives the second top head 12 to separate from the top surface of the silicon rod. The top block 1 is provided with a third top head 13 on one end surface in the first direction, and the third top head 13 is located between the first top head 11 and the second top head 12, and the top block 1 is provided with a driver (not shown in the figure) connected with the third top head 13; when the top block 1 is in the full pressing state, the driver connected with the third top head 13 drives the third top head 13 to abut against the top surface of the silicon rod; when the top block 1 is in the half pressing state, the driver connected with the third top head 13 drives the third top head 13 to abut against the top surface of the silicon rod; when the top block 1 is in the non-pressing state, the driver connected with the third top head 13 drives the third top head 13 to separate from the top surface of the silicon rod.

[0059] Embodiment three

[0060] The embodiment provides a wire feeding method based on the upper pressing assembly in the embodiment one or the embodiment two, and specifically as follows.

[0061] Step S1: the movable end of the auxiliary pressing device 2 moves away from the top surface of the silicon rod 5 in the first direction;

[0062] Step S2: the cutting wire enters between the auxiliary pressing device 2 and the first top head 11 from below the movable end of the auxiliary pressing device 2;

[0063] Step S3: the movable end of the auxiliary pressing device 2 moves to abut against the top surface of the silicon rod 5 in the first direction;

[0064] Step S4: the first top head 11 moves away from the top surface of the silicon rod 5 in the first direction;

[0065] Step S5: the cutting wire enters between the first top head 11 and the second top head 12 from below the first top head 11;

[0066] Step S6: the first tip 11 is moved along the first direction to abut against the top surface of the silicon rod 5.

[0067] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. An upper tightening assembly, characterized by: The top block is provided with a mounting surface in a first direction of the top block, the mounting surface is provided with a first top head and a second top head in a sliding manner, and sliding directions of the first top head and the second top head are parallel to the first direction; The auxiliary top tightener is located on a side of the top block in a second direction of the top block and close to the first top head, the first direction is perpendicular to the second direction, the first direction is a length direction of the top block, and the second direction is a radial direction of the top block, and the auxiliary top tightener has a movable end with a movable direction parallel to the first direction; The top block is provided with elastic members connected with the first top head and the second top head respectively, and the top block has a full compression state, a half compression state and a non-compression state; When the top block is in the full compression state, the first top head and the second top head compress the corresponding elastic members respectively and abut against a top surface of a silicon rod; When the top block is in the half compression state, the first top head does not compress the corresponding elastic member, the second top head compresses the corresponding elastic member, and the second top head abuts against the top surface of the silicon rod; When the top block is in the non-compression state, the first top head and the second top head do not compress the corresponding elastic members and are separated from the top surface of the silicon rod.

2. The upper take-up assembly of claim 1, wherein: The top block is provided with a third top head in a sliding manner on an end surface of the top block in the first direction of the top block, and the third top head is located between the first top head and the second top head, and the top block is provided with an elastic member connected with the third top head; When the top block is in the full compression state, the third top head compresses the corresponding elastic member and abuts against the top surface of the silicon rod; When the top block is in the half compression state, the third top head compresses the corresponding elastic member and abuts against the top surface of the silicon rod; When the top block is in the non-compression state, the third top head does not compress the corresponding elastic member and is separated from the top surface of the silicon rod.

3. The upper take-up assembly of claim 2, wherein: The first top head and the second top head are symmetrically arranged on both sides of a center line of the mounting surface, the third top head is arranged on the center line of the mounting surface, and a notch is arranged on an end of the third top head away from the top block and faces the first top head.

4. The upper take-up assembly of claim 1, wherein: The top block is provided with drivers connected with the first top head and the second top head respectively, and the top block has a full compression state, a half compression state and a non-compression state; When the top block is in the full compression state, the driver connected with the first top head drives the first top head to abut against the top surface of the silicon rod, and the driver connected with the second top head drives the second top head to abut against the top surface of the silicon rod; When the top block is in the half compression state, the driver connected with the first top head drives the first top head to be separated from the top surface of the silicon rod, and the driver connected with the second top head drives the second top head to abut against the top surface of the silicon rod; When the top block is in the non-compression state, the driver connected with the first top head drives the first top head to be separated from the top surface of the silicon rod, and the driver connected with the second top head drives the second top head to be separated from the top surface of the silicon rod.

5. The upper take-up assembly of claim 4, wherein: The top block is provided with a third top head in a sliding manner on an end surface of the top block in the first direction of the top block, and the third top head is located between the first top head and the second top head, and the top block is provided with a driver connected with the third top head; When the top block is in full compression state, the driver connected with the third top head drives the third top head to abut against the top surface of the silicon rod; When the top block is in half compression state, the driver connected with the third top head drives the third top head to abut against the top surface of the silicon rod; When the top block is in non-compression state, the driver connected with the third top head drives the third top head to separate from the top surface of the silicon rod.

6. The upper take-up assembly of claim 5, wherein: The first top head and the second top head are symmetrically arranged on both sides of the center line of the mounting surface, and the third top head is arranged on the center line of the mounting surface, and the third top head is provided with a notch facing the first top head on the end away from the top block.

7. The upper take-up assembly of claim 2 or 5, wherein: The sensor is further included, and the detection end of the sensor faces the end away from the top block of the first top head, or the end away from the top block of the second top head, or the end away from the top block of the third top head.

8. The upper take-up assembly of claim 1, wherein: The edge skin top tightener is further included, and the moving direction of the edge skin top tightener is parallel to the first direction.

9. A method of threading a line based on the upper tensioning assembly according to any one of claims 1-8, characterized in that: The method further includes the following steps: S1, the first top head abuts against the top surface of the silicon rod; S2, the cutting line enters between the auxiliary top tightener and the first top head from below the moving end of the auxiliary top tightener; S3, the moving end of the auxiliary top tightener abuts against the top surface of the silicon rod; S4, the first top head moves away from the top surface of the silicon rod along the first direction; S5, the cutting line enters between the first top head and the second top head from below the first top head.

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