Upper tensioning element, thread unwinding method and square root machine

Abstract

The application relates to a square cutting device for a single crystal silicon rod, in particular to an upper pressing piece, a wire withdrawing method based on the upper pressing piece and a square cutting machine containing the upper pressing piece. The upper pressing piece is used for axially fixing the top of a side skin, the top profile of the side skin has a cutting edge, and the upper pressing piece comprises a side skin opening structure, at least two pressing blocks and vertical driving structures which are independently connected with the pressing blocks; the pressing blocks are installed on the side skin opening structure, the side skin opening structure is used for driving the pressing blocks to move laterally, the spacing between at least one pressing block and the cutting edge is different from the spacing between the rest of the pressing blocks and the cutting edge, and the vertical driving structures are used for driving the bottom of the pressing blocks to abut against the top surface of the side skin. The upper pressing piece provided by the application can realize the fixation of the side skin in the cutting line withdrawing process in combination with a specific wire withdrawing method.

Description

Technical Field

[0001] This invention relates to a squaring device for monocrystalline silicon rods, specifically to an upper clamping member, a wire unwinding method based on the upper clamping member, and a squaring machine including the upper clamping member. Background Technology

[0002] Existing technologies typically require squaring monocrystalline silicon rods (round rods) to obtain square rods, with the cutting scrap edges being recycled. During the squaring process of monocrystalline silicon rods, the scrap edges usually need to be axially fixed to prevent problems such as tipping over during the squaring process, as illustrated in the method for collecting vertically cut monocrystalline silicon scrap edges disclosed in CN114559569A. See the aforementioned patent. Figure 3 The aforementioned patent, by pre-positioning the two-wheel cutting system between the edge-skin clamp 530 and the upper clamping member 520, allows the edge-skin clamp 530 to abut against the top of the monocrystalline silicon. At this point, after the cutting line cuts the edge, the cutting line is located between the edge-skin lower clamping member 540 and the rotating lower clamping member 510. Therefore, leveraging the advantages of the two-wheel cutting system, no wire retraction is required during edge removal, thus avoiding interference with the external edge-skin clamping system. In practical applications, the stability of the two-wheel cutting system has been found to be insufficient, leading to the gradual adoption of a four-wheel cutting system. However, the disadvantages of the four-wheel cutting system are obvious: its complex structure and large size necessitate wire retraction before edge removal to avoid interference and other problems. See also the aforementioned patent... Figure 3 It is known that due to the limitations of the upper and lower clamping structures on the edge skin, both the upward and downward retraction strategies inevitably carry the risk of edge skin flipping over. Furthermore, the existing upward retraction scheme suffers from difficulty in retracting the cutting line to the cutting station during the upward retraction process because the edge skin adheres to the cutting surface of the main body. Summary of the Invention

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide an upper tensioning member that can keep the edge skin stable during the unwinding process, an unwinding method based on the upper tensioning member, and a squaring machine including the upper tensioning member.

[0004] To solve the above-mentioned technical problems, the present invention provides an upper clamping member for axially fixing the top of the edge skin, wherein the top contour of the edge skin has a cutting edge, and includes an edge skin prying structure, at least two pressure blocks, and a vertical drive structure independently connected to the pressure blocks.

[0005] The pressing block is mounted on the edge-opening structure, and the edge-opening structure is used to drive the pressing block to move laterally.

[0006] The distance between at least one of the pressing blocks and the cutting edge is different from the distance between the remaining pressing blocks and the cutting edge;

[0007] The vertical drive structure is used to drive the bottom of the pressure block to abut against the top surface of the edge skin.

[0008] Furthermore, the pressing block is constructed as a block structure with an L-shaped cross-section formed by combining a horizontally arranged first part and a vertically arranged second part;

[0009] The spacing between at least one of the second portions and the cutting edge is different from the spacing between the remaining second portions and the cutting edge.

[0010] Furthermore, the edge-opening structure includes a transverse track, a connecting plate, and a transverse drive structure;

[0011] The pressure block is mounted on the connecting plate, and the connecting plate is mounted on the transverse track;

[0012] The lateral drive structure is connected to the connecting plate, and the lateral drive structure is used to drive the connecting plate to move on the lateral track.

[0013] A further method for removing the wire is provided, which uses the aforementioned upper clamping member to perform the wire removal process.

[0014] Furthermore, the method for removing the stitching includes the step of using the edge-skin splitting structure to create a gap between the edge skin and the main body;

[0015] The step of moving the cutting line from the gap to above the edge skin;

[0016] And the step of controlling the vertical displacement of the pressure block sequentially from the pressure block with the smallest distance from the cutting edge to the pressure block with the largest distance from the cutting edge during the process of moving the cutting line upwards and downwards.

[0017] Furthermore, a squaring machine is provided, including the aforementioned lower clamping member.

[0018] Furthermore, the squaring machine includes an edge cutting structure, a loading and unloading structure, a transfer structure, and an edge receiving structure;

[0019] The upper clamping member is installed in the edge cutting structure;

[0020] The transfer structure is disposed between the loading / unloading structure, the edge cutting structure, and the edge receiving structure. The transfer structure is used to transfer round bars from the loading / unloading structure to the edge cutting structure, to transfer edge skins cut by the edge cutting structure to the edge receiving structure, and to transfer square bars cut by the edge cutting structure to the loading / unloading structure.

[0021] Furthermore, the loading and unloading structure includes a machine base, a loading structure, a unloading structure, a lateral displacement structure, and at least one tilting structure; the loading structure, the unloading structure, and the lateral displacement structure are all mounted on the machine base, the loading structure and the unloading structure are hinged to the lateral displacement structure, and the tilting structure is located inside the machine base and below the loading structure and the unloading structure.

[0022] Furthermore, the transfer structure includes a rotating table, and a round bar clamping structure, an edge clamping structure, and a square bar clamping structure respectively disposed on the side of the rotating table.

[0023] Furthermore, the edge cutting structure includes a main frame, two oppositely arranged cutting structures, an upper top structure, a lower top structure, and a support platform;

[0024] The cutting structure is installed on the main frame, the upper top structure is installed on the main frame and located between the two cutting structures, the main frame and the lower top structure are both fixed on the support platform, the lower top structure and the upper top structure are installed axially aligned, the edge-opening structure is equipped with an upper top clamping member, and the lower top clamping member is installed on the lower top structure.

[0025] The beneficial effects of the present invention are as follows: the upper clamping member provided by the present invention, combined with its specific unwinding method, can effectively ensure the stability of the cutting line during the upper unwinding process, while effectively stabilizing the edge skin. Attached Figure Description

[0026] Figure 1 The diagram shown is a structural schematic of the first step in the cutting and unwinding process of the present invention in a specific embodiment.

[0027] Figure 2 The diagram shown is a structural schematic of the second step in the cutting and unwinding process of the present invention in a specific embodiment.

[0028] Figure 3 The diagram shown is a structural schematic of the third step in the cutting and unwinding process of the present invention in a specific embodiment.

[0029] Figure 4 The diagram shown is a structural schematic of the fourth step in the cutting and unwinding process of the present invention in a specific embodiment;

[0030] Figure 5 The diagram shown is a structural schematic of the fifth step in the cutting and unwinding process of the present invention in a specific embodiment.

[0031] Figure 6 The diagram shown is a structural schematic of the sixth step in the cutting and unwinding process of the present invention in a specific embodiment.

[0032] Figure 7 The diagram shown is a structural schematic of the seventh step in the cutting and unwinding process of the present invention in a specific embodiment.

[0033] Figure 8 The diagram shown is a structural schematic of the eighth step in the cutting and unwinding process of the present invention in a specific embodiment.

[0034] Figure 9 The diagram shown is a structural schematic of the ninth step in the cutting and unwinding process of this invention in a specific embodiment.

[0035] Figure 10 The diagram shown is a schematic representation of the edge-splitting structure in a specific embodiment of the present invention.

[0036] Figure 11 The diagram shown is a structural schematic of the square-opening machine according to a specific embodiment of the present invention;

[0037] Figure 12 The diagram shown is a schematic representation of the loading and unloading structure in a specific embodiment of the present invention.

[0038] Figure 13 The diagram shown is a schematic diagram of the feeding structure or unloading structure of the present invention from one perspective in a specific embodiment.

[0039] Figure 14 The diagram shown is a schematic diagram of another structure of the feeding or unloading structure in a specific embodiment of the present invention from one perspective.

[0040] Figure 15 The diagram shown is a structural schematic of the flipping structure in a specific embodiment of the present invention;

[0041] Figure 16 The diagram shown is a schematic representation of the transfer structure in a specific embodiment of the present invention.

[0042] Figure 17 The diagram shown is a schematic representation of the edge-cutting structure in a specific embodiment of the present invention.

[0043] Figure 18 The diagram shown is a schematic representation of the edge skin receiving structure in a specific embodiment of the present invention.

[0044] Figure 19 The figure shown is a cross-sectional schematic diagram of the edge skin receiving box in a specific embodiment of the present invention;

[0045] Figure 20 The figure shown is a top view of the total edge skin receiving structure of the present invention in a specific embodiment;

[0046] Figure 21The diagram shown is a schematic diagram of the feeding or unloading structure of the present invention from another perspective in a specific embodiment. Detailed Implementation

[0047] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0048] Existing technologies typically use a squaring machine to square cylindrical monocrystalline silicon rods, forming monocrystalline silicon rods with square or rectangular cross-sections (referred to as the "body" in this document), with the remaining portion after cutting being called the edge. Existing squaring machines include vertical squaring machines (such as CN114536573A) and horizontal squaring machines (such as CN113306030A), with the choice mainly based on the length of the monocrystalline silicon rod and the specific process. The squaring and cutting of monocrystalline silicon rods primarily relies on wire cutting technology. The stability of wire cutting technology improves with the increase of the number of wheels in the cutting wheel system. Existing technologies typically employ two-wheel, three-wheel, and four-wheel systems, such as the annular wire saw cutting system disclosed by the applicant (CN212218920U). Edge picking strategies mainly include "direct picking" and "indirect picking." Specifically, the "direct pickup" includes at least two situations: a) the cutting system is almost unobstructed, allowing edge grippers to directly pick up and transfer the edge after the single-crystal silicon rod is cut, such as CN114536573A; b) the cutting system is housed in a large cutting housing, in which case the edge grippers are allowed to pass through the through holes on the cutting housing to pick up and transfer the edge through the through holes, such as CN217098379U, or the edge can be moved to the through holes by an additional edge displacement structure and picked up and transferred by the edge grippers.

[0049] For "indirect pickup," due to the obstruction of the cutting housing, it is necessary to insert the edge skin gripper between the two cutting housings to clamp and remove the edge skin. However, due to the interference from the two cutting housings and the cutting wheel system, it is necessary to retract the cutting line when the edge skin gripper is inserted. That is, in this embodiment, the edge skin gripper is inserted between the cutting wheel system and clamps the corresponding edge skin after the cutting wheel system retracts, then withdraws from between the two cutting wheel systems and transfers the edge skin. It should be understood that, in this document, the length of the through hole in the cutting housing is less than the length of the edge skin and / or the width of the through hole is less than the width of the edge skin, or the cutting housing may not even contain such a through hole.

[0050] Of course, since the size of the through hole in the cut shell is fixed, while the size of the single crystal silicon rod is adjustable, the aforementioned edge skin can still pass through the through hole in some special cases. This situation is allowed in this application, but it is not the general situation of this application. That is, the edge skin cannot pass through the through hole or does not contain the through hole. Therefore, for ease of writing, the following text will be written based on the aforementioned general situation.

[0051] Before the squaring process of a monocrystalline silicon rod, it is necessary to perform necessary axial alignment and fixation to ensure the accuracy of the squaring. In the prior art, an upper and lower clamping structure is respectively set at both ends of the axial direction of the monocrystalline silicon rod to fix the axis of the monocrystalline silicon rod and achieve necessary axial fixation (such as CN114474437A), thereby ensuring the stability of the squaring process. In one embodiment, in order to maintain the stability of the edge skin during the cutting process and avoid problems such as lateral tilting of the edge skin after cutting, it is preferable to perform the same axial fixation on the edge skin, such as CN112192769A. However, due to the structural limitations of its upper and lower clamping components, it is difficult to ensure the stability of the edge skin during the wire removal process, regardless of whether an upper or lower wire removal strategy is used. Therefore, the inventors provide a novel upper clamping component, which, combined with a specific upper wire removal method, can achieve efficient and safe wire removal while ensuring the stability of the edge skin.

[0052] Specifically, see Figures 1 to 9 As shown, the inventor provides an upper clamping member 33, which can cooperate with an existing lower clamping member 34 to achieve axial fixation of the edge skin 51. The upper clamping member is installed on the top surface of the edge skin, and the bottom of the upper clamping member abuts against the top surface of the edge skin to fix the top surface of the single crystal silicon rod. The upper clamping member includes an edge skin splitting structure 35, at least two pressure blocks 331, and a vertical drive structure 332 independently connected to the pressure blocks; the pressure blocks are installed on the edge skin splitting structure, which is used to drive the pressure blocks to move laterally; the distance between at least one of the pressure blocks and the cutting edge is different from the distance between the remaining pressure blocks and the cutting edge; the vertical drive structure is used to drive the bottom of the pressure blocks to abut against the top surface of the edge skin. It can be understood that the cutting edge of the edge skin, i.e., the cutting position of the cutting line 311, is determined by a pre-calculated cutting edge. In this embodiment, the reference line is not limited to the cutting edge. The reference line can be arbitrary within the contour of the top surface of the round bar; it can be any straight line parallel to the cutting edge, such as a straight line parallel to the cutting edge and passing through the center of the circle. However, for ease of determining the installation position of the pressure block and subsequent sequence control, the cutting edge is generally used as the reference line in practical applications. Therefore, it is understood that, unless otherwise specified, the straight line mentioned below refers to the cutting edge.

[0053] In one alternative implementation, see [link to implementation details]. Figure 2 As shown, the pressure block is constructed as an L-shaped block structure formed by a horizontally arranged first part 3311 and a vertically arranged second part 3312; wherein the distance between at least one second part and the cut edge is different from the distance between the remaining second parts and the cut edge. That is, in this embodiment, the pressure block is mounted on its independent vertical drive structure 332 in a generally inverted form, and the direction of its inversion is determined by the distance between its second part and the cut edge. Specifically, see... Figures 1 to 9 As shown, in this embodiment, during the unwinding process, the pressure block with the smallest distance from the cutting edge is driven upward by its vertical drive structure, thereby creating a channel for the unwinding of the cutting wire. When the unwinding wire passes through this pressure block and is approximately positioned between this pressure block and an adjacent pressure block, the pressure block is driven to re-abut against the top surface of the edge skin. After this abutment process is completed, the adjacent pressure block is similarly driven upward by its independent vertical drive structure to facilitate the continued unwinding of the cutting wire. This process continues until the cutting wire is completely withdrawn from all the upper clamping members. It is understood that in this embodiment, when at least one pressure block is driven upward, at least one pressure block always abuts against the top surface of the edge skin; this engagement ensures the stability of the edge skin during the unwinding process. Of course, in this embodiment, the shape of the pressing block is arbitrary to a certain extent, that is, the second part can be in any position in the first part, such as in the shape of a "T", but it should be ensured that the bottom surface of the second part is lower than the bottom surface of the first part. That is, it can be considered that during the process of removing the cutting line, the cutting line is located between the bottom surface of the second part and the bottom surface of the first part.

[0054] In existing technologies, to prevent the cutting wire from overheating during cutting and to avoid damage to the cutting surface caused by impurities adhering to the cutting wire, it is generally necessary to continuously spray water to cool the cutting wire. However, this water spraying cooling process inevitably results in a large number of droplets adhering to the surface of the cutting wire, continuously wetting the cutting surface during the cutting process. Ultimately, this leads to the cutting surfaces sticking together when the cutting wire is withdrawn, affecting the subsequent edge picking process, as shown in CN217098379U. Simultaneously, when using an upward retraction strategy, since the cutting wire needs to retract along the cutting direction to the upper part, it inevitably needs to pass through the channel between the cutting surfaces of the edge and the main body again. Therefore, when the cutting surfaces stick together, this channel is inevitably restricted, making it difficult for the cutting wire to retract quickly and stably. Therefore, it is preferable to pre-separate the edge and the main body before the cutting wire is withdrawn to form a necessary and suitable cutting wire retraction channel between their cutting surfaces. In a preferred embodiment, see [reference needed]. Figure 3 , Figure 4 and Figure 10 The pressing block is connected to the edge-opening structure 35, and the lower clamping member 34 is connected to the transverse drive structure 341. The edge-opening structure includes a transverse track 352, a connecting plate 353, and a transverse drive structure 351. The pressing block is mounted on the connecting plate, and the connecting plate is mounted on the transverse track. The transverse drive structure is connected to the connecting plate and drives the connecting plate to move on the transverse track. In this embodiment, the transverse drive structure drives the connecting plate to move on the transverse track, thereby causing the pressing block mounted on the connecting plate to move laterally. This, in conjunction with the transverse drive structure of the lower clamping member, further drives the lateral movement of the edge skin, thus forming the aforementioned cutting line retraction channel. In one embodiment, the transverse drive structure is a motor or a cylinder.

[0055] In one optional embodiment, the edge-opening structure includes a lateral drive structure 351, a lateral track 352, a connecting plate 353 disposed on the lateral track and allowing lateral movement on the lateral track, and a mounting bracket 354 connected to the lateral drive structure. The mounting bracket is provided with a guide hole 3541, and the connecting plate is provided with a guide post 3531 on the side near the mounting bracket, the guide post being located within the guide hole. The upper clamping member 33 is mounted on the side of the connecting plate away from the lateral drive structure.

[0056] Specifically, the lateral drive structure controls the connecting plate to move laterally on the lateral track. The connecting plate is limited by the guide hole to move laterally within a small range, such as 0-5 mm. That is, in this embodiment, since the upper clamping member abuts against the top surface of the edge skin, the lateral drive structure can drive its connecting plate to move laterally on the lateral track, thereby using the upper clamping member to drive the edge skin to move laterally, thus forming the necessary gap between the edge skin and the main body. It is understood that the term "main body" in this document is not limited to referring to a single-crystal silicon rod with a square or rectangular cross-section, but also refers to the remaining portion after the edge skin has been removed following a single edge skin cutting.

[0057] During the process of the side-skin prying structure being driven, the lateral drive structure drives the mounting frame to move towards the lateral track. During this movement, the guide post is guided by the guide hole, forcing the connecting plate to move laterally on the lateral track, such as with a lateral displacement of 0-5mm. This, in turn, drives the upper clamping member and the side skin to move laterally via the connecting plate. The reverse is also true, and will not be elaborated further here.

[0058] In terms of specific processes, before the cutting wire retraction begins, the lateral drive structure operates, driving the upper clamping member to move laterally via the connecting plate. The lower clamping member, controlled by its lateral drive structure, moves laterally to form a 0-5mm gap (i.e., the aforementioned cutting wire retraction channel). At this point, the cutting wire is allowed to move upwards and retract through this gap. It is understood that in this embodiment, the lateral displacement direction of the upper clamping member is the same as that of the lower clamping member. In this embodiment, the lateral drive structure connected to the lower clamping member can be a motor or a cylinder. In an optional embodiment, the lower clamping member includes a pressure block mounted on the lateral drive structure. The pressure block abuts against the bottom of the edge skin while cooperating with the lateral drive structure to drive the edge skin lateral movement. In a preferred embodiment, the pressure block can be a cylinder, cooperating with the lateral drive structure to stabilize the edge skin lateral movement process. It is understood that in this embodiment, the driving direction of the cylinder is the same as the driving direction of the lateral drive structure.

[0059] More specifically, see Figure 1 and Figure 3 or Figure 4 As shown, the cutting wheel system 31 moves to the cutting waiting position, at which time the upper top structure 32, the upper clamping member 33, the lower top structure 36 and the lower clamping member 34 respectively abut against the top and bottom surfaces of the single crystal silicon rod 5.

[0060] See Figure 2 As shown, after the upper clamping member 33 moves upward to allow the cutting line 311 to move radially to the cutting position, the upper clamping member 33 moves downward to re-abut against the top surface of the single crystal silicon rod 5.

[0061] See Figure 3 As shown, the cutting line 311 cuts the single crystal silicon rod 5 from top to bottom along the axial direction of the single crystal silicon rod 5 to form at least one edge skin 51. At this time, the top surface of the edge skin is fixed by the upper clamping member 33, and its bottom surface is fixed by the lower clamping member 34.

[0062] See Figure 4 As shown, the upper clamping member 33 and the lower clamping member 34 move laterally in sync to form a cutting line retraction channel.

[0063] See Figure 5 As shown, the cutting line 311 is retracted to the initial cutting position (i.e., the aforementioned cutting position).

[0064] See Figure 6 (The aforementioned cutting line retraction channel has been omitted) As shown, the pressure block 331 with the smallest distance from the cutting edge moves upward, and the cutting line 311 is ready to retract horizontally.

[0065] See Figure 7(The aforementioned cutting line retraction channel has been omitted) As shown, the cutting line 311 moves to the middle alternation position (i.e., between the aforementioned pressure block 331 and the adjacent pressure block (which has a larger distance from the cutting edge compared to the aforementioned pressure block)). After the pressure block moves down completely, the adjacent pressure block moves up.

[0066] See Figure 8 (The aforementioned cutting line retraction channel has been omitted) As shown, cutting line 311 moves to the cutting waiting position.

[0067] See Figure 9 (The aforementioned cutting line retraction channel has been omitted) As shown, the adjacent pressure block 331 moves downward.

[0068] It should be noted that in the preceding steps, the lower clamping member 34 and the lower clamping structure 36 always abut against the bottom surface of the single-crystal silicon rod. The lower clamping member cooperates with at least one pressure block 331 to achieve axial fixation of the edge skin.

[0069] based on Figures 1 to 9 As can be seen, the retraction method provided in this paper can be summarized as follows: the retraction process of the cutting line using the aforementioned upper clamping device includes at least the following steps:

[0070] S1. The step of forming a gap between the edge skin and the main body using the edge skin splitting structure;

[0071] S2, the step of moving the cutting line from the gap to above the edge skin;

[0072] S3, during the upward retraction of the cutting line, involves sequentially controlling the vertical displacement of the pressure blocks from the pressure block with the smallest distance from the cutting edge to the pressure block with the largest distance from the cutting edge. It should be noted that during the horizontal retraction of the cutting line, at least one pressure block should be in contact with the bottom surface of the edge skin. For example, when the number of pressure blocks is two, the other pressure block is only allowed to move downwards when one pressure block is fully in contact with the bottom surface of the edge skin. The upward and downward displacement of the pressure blocks can be achieved using existing general vertical drive structures, such as cylinders.

[0073] Further, a square root extractor is provided, see [link to relevant documentation]. Figure 11 As shown, it includes an edge cutting structure 3 containing the aforementioned upper clamping member 33, as well as an unloading structure 1, a transfer structure 2, and an edge receiving structure 4 (in... Figure 11(Not all shown). The transfer structure is disposed between the loading / unloading structure, the edge cutting structure, and the edge receiving structure. The transfer structure is used to pick up the cylindrical single crystal silicon rod from the loading / unloading structure and transfer it to the edge cutting structure for cutting, and to transfer the cut edge to the edge receiving structure, and to transfer the cut main body (square rod) to the loading / unloading structure for unloading. The edge is received by the edge receiving structure and then transferred to the edge collection box.

[0074] For details, see Figures 12 to 15 and Figure 21 As shown, the loading / unloading structure 1 includes a machine base 11, a loading structure 12, a unloading structure 13, a lateral displacement structure 127, and at least one flipping structure 14. The loading structure, unloading structure, and lateral displacement structure are all mounted on the machine base. The loading structure and unloading structure are hinged to the lateral displacement structure. The flipping structure is located within the machine base and below the loading and unloading structures. In one embodiment, the loading structure is driven laterally by the lateral displacement structure to move above the flipping structure, and then flipped upwards by the flipping structure, thus facilitating the gripping of the single-crystal silicon rod on the loading structure by the transfer structure. In another embodiment, the unloading structure is driven laterally by the lateral displacement structure to move above the flipping structure, and then flipped upwards by the flipping structure, thus facilitating the placement of the main body onto the unloading structure by the transfer structure. In order to achieve the reset of the feeding structure and the unloading structure, it is preferable to set a reset structure between the feeding structure and the unloading structure and the lateral displacement structure. The reset structure can adopt an existing general structure, such as a torsion spring 128.

[0075] In one alternative implementation, see [link to implementation details]. Figure 13 As shown, the loading / unloading structure includes a base platform 125, two side plates 121 disposed on the base platform, and a support assembly 124. The side plates are vertically disposed on the surface of the base platform, and the two side plates are parallel and spaced apart. Rollers 122 are disposed on the inner and outer walls of the side plates. A support assembly is disposed at one end of the side plate along its length. The lateral displacement structure is disposed near the support assembly and hinged to the bottom surface of the base platform. A top block 123 is disposed at the other end of the side plate along its length, and the top block is located between the two side plates. Specifically, the rollers are used to support the monocrystalline silicon rod, and the top block and the support assembly abut against the two end faces of the monocrystalline silicon rod to fix the monocrystalline silicon rod.

[0076] In one alternative implementation, see [link to implementation details]. Figure 13As shown, the support assembly includes a guide rail 1243, two sliders 1242 disposed on the guide rail, a single plate 1241 disposed on the sliders, and a cylinder 1244 connected to at least one slider. Specifically, the cylinder is used to drive at least one slider to move on the guide rail, thereby controlling the spacing between adjacent single plates, thus enabling applicability to monocrystalline silicon rods of different sizes. More preferably, the surface of the single plate near the monocrystalline silicon rod has anti-slip textures, which can be either negative or positive textures, with negative textures being the most preferred, to prevent the monocrystalline silicon rod from slipping on this surface. Of course, the support of the monocrystalline silicon rod can also be achieved by a single plate, as shown in [reference needed]. Figure 14 .

[0077] In one alternative implementation, see [link to implementation details]. Figure 15 As shown, the flipping structure includes a connecting rod 141, a first connecting seat 142 hinged to one end of the connecting rod, a flipping drive component 143 hinged to the middle of the connecting rod, and a second connecting seat 144 hinged to the flipping drive component. Both the first and second connecting seats are fixedly connected to the machine base, and a roller 145 is provided at the other end of the connecting rod. Specifically, the flipping drive component drives the connecting rod to flip upwards. During this upward flipping process, the connecting rod abuts against the bottom surface of the loading or unloading structure above it, thereby causing it to flip upwards. After loading or unloading is completed, the flipping drive component drives the connecting rod to flip downwards, while the roller reduces vibrations that occur when the connecting rod comes into contact with the machine base after it has completely flattened. The flipping drive component is a general structure, such as a cylinder or hydraulic cylinder.

[0078] See Figure 21 As shown, to achieve the aforementioned safe flipping process, a connecting box 126 is preferably provided on the bottom surface of the base platform 125, and the bottom surface of the connecting box is provided with a through hole 1261 for the connecting rod to pass through. That is, in this embodiment, the connecting rod moves into the through hole to abut against the bottom surface of the base platform and drive the loading / unloading structure to flip. In a preferred embodiment, the connecting box has a positioning structure 1262, and the connecting rod is positioned by engaging with the positioning structure. That is, in this embodiment, the positioning structure can effectively position the loading / unloading structure and effectively prevent the loading / unloading structure from undergoing undesirable lateral displacement during the flipping process.

[0079] In one alternative implementation, see [link to implementation details]. Figure 12As shown, multiple feeding structures 12 and multiple unloading structures 13 are provided, and the feeding and unloading structures have corresponding flipping structures. That is, in this embodiment, by deploying corresponding flipping structures under both the unloading and feeding structures, excessive lateral displacement of the feeding / unloading structures is avoided, which would lead to an increase in the overall lateral volume occupied by the feeding and unloading structures.

[0080] In one implementation, see Figure 11 and Figure 16 As shown, the transfer structure includes a rotary table 24, and a round bar gripping structure 21, an edge bar gripping structure 22, and a square bar gripping structure 23 respectively disposed on the side of the rotary table. The round bar gripping structure includes at least one round bar gripper, which is used to grip the round bar and transfer it from the feeding structure to the edge bar cutting structure for edge bar cutting. In an optional embodiment, the round bar gripping structure includes an upper round bar gripper 211 and a lower round bar gripper 212, wherein the lower round bar gripper is used to grip the bottom surface of the round bar, and both the upper and lower round bar grippers are equipped with vision sensors or other sensors for measuring the length of the round bar. For example, after the lower round bar gripper clamps the bottom surface of the round bar, the upper round bar gripper simultaneously clamps the round bar and, based on its independent Z-axis (vertical) movement structure, drives the upper round bar gripper to move upward along the axial direction of the round bar to the top of the round bar. At this time, the length of the round bar is measured by a sensor. The edge skin gripping structure includes an upper edge skin gripper 221 and a lower edge skin gripper 222. Both the upper and lower edge skin grippers are provided with a clearance structure for the internal components of the edge skin cutting structure. The internal components can be the aforementioned upper and lower clamping members. The edge skin gripping structure is used to remove the edge skin from the edge skin cutting structure and transfer it to the edge skin receiving structure. The square bar gripping structure includes at least one square bar gripper for removing the square bar (the aforementioned main body) from the edge skin cutting structure and transferring it to the unloading structure. In an optional embodiment, the square bar gripper includes an upper bar gripper 231 and a lower bar gripper 232.

[0081] It should be noted that, in this document, the round bar gripper, the edge gripper (including the upper edge gripper and the lower edge gripper), and the square bar gripper each have their own independent lateral drive structure and vertical drive structure. The lateral drive structure is used to control the opening and closing of the gripper, i.e., to realize the gripping and releasing actions. The vertical drive structure is used to drive the distance between the upper gripper and the lower clamping gripper. The lateral and vertical drive structures can be existing general structures, including but not limited to combinations of motors, lead screws, etc., or as shown in CN212218924U. See also... Figure 16As shown, the rotary table has its own independent rotating structure 25 and transverse driving structure 26. The rotating structure is used to drive the rotary table to rotate around the Z-axis or to rotate laterally, that is, to realize the switching of the round bar clamping structure, the edge clamping structure and the square bar clamping structure in multiple workstations. The transverse driving structure is used to drive the rotary table to move away from or towards the loading / unloading structure or the edge receiving structure. The rotating structure and the transverse driving structure are general structures, as shown in CN212218924U.

[0082] In one implementation, see Figure 17 As shown, the edge-cutting structure includes a main frame 39, two opposing cutting structures 37, an upper clamping member, an upper lifting structure 32, a lower clamping member, and a lower lifting structure 36. The cutting structures are mounted on the main frame, and the upper lifting structure is mounted on the main frame and located between the two cutting structures. Both the main frame and the lower lifting structure are fixed to a support platform 38. The lower lifting structure and the upper lifting structure are axially aligned. The upper clamping member 33 is installed in the edge-cutting structure, and the lower clamping member 34 is installed on the lower lifting structure. The upper lifting structure has an independent vertical drive structure.

[0083] It is understood that the cutting wheel system 31 is mounted on the cutting structure 37, and the cutting structure has a through hole 371, the size of which, under normal circumstances, does not allow the edge skin to pass through.

[0084] In one optional embodiment, the edge-cutting structure further includes a sensor group installed inside it. This sensor group detects the crystal wire position of the round bar when it is clamped by the upper and lower top structures, thereby controlling the approach distance of the cutting structure via a controller to ensure cutting accuracy. Specifically, after the upper and lower top structures clamp the round bar, the left and right sensors (detection and sensing components) extend to measure the crystal wire. When the round bar is rotated by the lower top structure, if the sensor detects that the crystal wire does not meet the standard, the grippers of the transfer structure re-grip the round bar and reposition it between the upper and lower top structures, repeating the aforementioned steps. If the measurement result still does not meet the standard, the bar is directly transferred to the unloading structure or other recycling structure. It should be noted that the method for measuring the crystal wire of the round bar using sensors is a common technique in this industry and will not be elaborated upon here.

[0085] The upper and lower structures are general structures, as shown in CN114474437A, CN218365781U or CN217144436U.

[0086] Specifically, regarding the process, see [link / reference]. Figures 1 to 9 and Figure 17Based on the length of the round bar measured by the round bar clamping structure, the distance between the upper top structure 32 and the lower top structure 36 is adjusted by the vertical driving structure. This allows the round bar 5 to be placed between the upper and lower top structures while the upper top structure is driven to press against the top surface of the round bar. When the round bar (a single-crystal silicon rod with a circular cross-section) is clamped by the upper and lower top structures, the edge-opening structure 35 controls the upper clamping member 33 to be positioned on the upper surface of the edge (any position on the top surface of the edge after it has been pre-calculated) and drives the pressure block to press against it through its own vertical driving structure. At the same time, the lower clamping member 34 presses against the lower surface of the corresponding edge position. At this time, after the cutting structure 31 moves to the cutting waiting position, the upper clamping member moves upward as a whole and forms a channel for the cutting line 311 to move to the edge cutting position. After the cutting line moves to the edge cutting position, the upper clamping member moves downward as a whole to re-press against the upper surface of the edge. After the cutting line has completely cut the edge skin, the edge skin prying structure moves to both sides of the round bar to drive the edge skin to move laterally, so as to form a necessary gap between the edge skin and the cutting surface of the main body. At this time, the cutting line moves up from the gap to the initial cutting position. Then, the upper clamping member is controlled to move vertically during the lateral displacement of the cutting line in the order of the pressure block with the smallest distance from the cutting edge to the pressure block with the largest distance from the cutting edge until the cutting line is completely retracted. The cutting structure is reset to the cutting waiting position or moved to the farthest end that can be allowed (relative to the axis of the round bar). At this time, the edge skin clamping structure extends between the two cutting structures. Its upper edge skin clamping claw clamps the top of the edge skin, and the lower edge skin clamping claw clamps the bottom surface of the edge skin. After the upper and lower clamping members are completely released from the clamping state, the edge skin clamping structure clamps the edge skin out and performs a transfer action. When the rotating structure transfers the square bar gripping structure to the cutting station corresponding to the edge-cutting structure, the square bar grippers extend between the cutting structures and clamp the sides of the square bar. At this time, the upper and lower top structures release their grip on the square bar, allowing the square bar gripping structure to remove the square bar and proceed with the transfer process. In an optional embodiment, during the transfer process of the edge-cutting structure, the square bar gripping structure gradually rotates to the cutting station; during the transfer process of the square bar gripping structure, the round bar gripping structure holding the round bar gradually rotates to the cutting station, and after it is fully inserted into the cutting station, the round bar gripping structure sends the round bar between the upper and lower top structures. In this embodiment, this process control reduces the overall process flow and improves production efficiency.

[0087] It should be noted that, in this embodiment, the cutting wheel system can be any existing number of cutting wheel systems, such as a two-wheeled, three-wheeled, or four-wheeled wheel system. In a preferred embodiment, the cutting wheel system is a four-wheeled wheel system, see [link to documentation]. Figure 17Its structure is a general structure, such as including at least one drive wheel 312, a tension wheel 313 and two guide wheels 314, or see CN212218920U or CN217098379U.

[0088] It should also be noted that, Figure 17 The diagrams provided are simplified representations of the edge-cutting structure and are intended to illustrate its main structural features. If any discrepancies exist between the diagrams and the text, the text shall prevail.

[0089] In one implementation, see Figure 18 As shown, the edge leather receiving structure 4 includes an edge leather gripper assembly 41, an edge leather receiving platform 42, and an edge leather receiving box 44 placed on the edge leather receiving platform. The edge leather gripper assembly includes a mounting frame 414, an upper edge leather gripper 412, a lower edge leather gripper 413, a vertical drive structure 411, a horizontal drive structure 415 (XY moving platform), and a rotating structure (not shown in the figure). The vertical drive structure is mounted on the mounting frame and controls the distance between the upper and lower edge leather grippers. The horizontal drive structure and the rotating structure are mounted on the mounting frame and drive the mounting frame to move along the X-axis or Y-axis. The rotating structure drives the mounting frame to rotate along the Z-axis. Both the upper and lower edge leather grippers have avoidance structures to avoid related components of the upper and lower edge leather grippers in the transfer structure. The lower edge leather gripper also has an avoidance structure to avoid the limiting structure on the bottom surface of the edge leather box. The structure of the edge leather box is shown in [reference needed]. Figure 19 As shown, its bottom surface has a limiting structure 441 for supporting the bottom surface of the edge skin to prevent the edge skin from detaching from the bottom surface of the edge skin box. At the same time, the limiting structure and the outer shell of the edge skin box form a hole 442 for the lower edge skin claw to pass through. That is, in one embodiment, when the lower edge skin claw extends into the edge skin box and the edge skin is restricted by the limiting structure, the lower edge skin claw can be moved out of the edge skin box from the hole and reset.

[0090] In one alternative embodiment, the lower gripper has an independent lateral drive structure (in... Figure 18 (Not shown in the diagram) This mechanism controls the relative movement of the two jaws in the lower edge leather gripper, thereby controlling the overall gripping width of the lower edge leather gripper to accommodate various edge leather / round bar sizes. The lateral drive structure is a general structure, as shown in CN212218924U.

[0091] The rotating structure and the lateral drive structure mounted on the mounting frame can be general structures in the art, such as CN212218924U, or other conventional structures that can achieve the aforementioned functions are all applicable to this embodiment.

[0092] In specific production, after the edge skin receiving structure receives the edge skin from the transfer structure, the mounting frame is driven to move above the edge skin receiving box by the horizontal drive structure, and the edge skin receiving structure is driven to move downward into the edge skin receiving box by the vertical drive structure. After the edge skin is received by the edge skin receiving box, the lower edge skin gripper passes out from the hole and the edge skin gripper assembly is reset.

[0093] In a preferred embodiment, the overall height of the edge receiving box is less than the height of the edge, that is, in this embodiment, when the lower edge claw passes through the hole, the upper edge claw does not extend into the cavity of the edge receiving box, that is, the upper edge claw is not restricted by the edge receiving box, which facilitates its reset process.

[0094] In another preferred embodiment, see Figures 18 to 20 The edge leather receiving structure further includes a traveling trolley 43, on which the edge leather receiving box is fixed. A first positioning structure 431 is provided at one end of the traveling trolley facing the edge leather gripper structure. A second positioning structure 421 is provided on the edge leather receiving platform 42 corresponding to the first positioning structure. The cooperation of the first and second positioning structures enables positioning of the traveling trolley while facilitating the movement and emptying of the loaded edge leather receiving box. More preferably, a pulley 422 is provided between the first and second positioning structures, facilitating the positioning process of both.

[0095] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for removing threads, characterized in that, The upper clamping device is used for the process of raising and lowering the cutting line; The upper clamping member is used to axially fix the top of the edge skin, the top contour of the edge skin having a cut edge, characterized in that it includes an edge skin prying structure, at least two pressure blocks, and a vertical drive structure independently connected to the pressure blocks; The pressing block is mounted on the edge-opening structure, and the edge-opening structure is used to drive the pressing block to move laterally. The vertical drive structure is used to drive the bottom of the pressure block to abut against the top surface of the edge skin; The pressing block is constructed as an L-shaped block structure formed by combining a horizontally arranged first part and a vertically arranged second part; wherein the distance between at least one second part and the cutting edge is different from the distance between the remaining second parts and the cutting edge; The method for removing the stitching specifically includes the step of using the edge-skin splitting structure to create a gap between the edge skin and the main body; The step of moving the cutting line from the gap to above the edge skin; And the step of controlling the vertical displacement of the pressure block sequentially from the pressure block with the smallest distance from the cutting edge to the pressure block with the largest distance from the cutting edge during the process of retracting the cutting line.

2. The unwinding method according to claim 1, characterized in that, The edge-opening structure includes a transverse track, a connecting plate, and a transverse drive structure; The pressure block is mounted on the connecting plate, and the connecting plate is mounted on the transverse track; The lateral drive structure is connected to the connecting plate, and the lateral drive structure is used to drive the connecting plate to move on the lateral track.

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