Lower tightening piece, thread stripping method and square machine

Abstract

The application relates to a square cutting device for a single crystal silicon rod, in particular to a lower pressing piece, a wire withdrawing method based on the lower pressing piece and a square cutting machine containing the lower pressing piece. The lower pressing piece is used for axially fixing the bottom surface of a round rod cutting formed edge skin, the bottom profile of the edge skin has a cutting edge, the lower pressing piece comprises at least two units and a driving structure independently connected with the units; the distance between at least one unit and the cutting edge is different from the distance between the rest of the units and the cutting edge; and the driving structure is used for driving the top of the unit to abut against the bottom surface of the edge skin. The lower pressing piece provided by the application can realize the fixation of the edge skin in the wire 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 a lower clamping member, a wire unwinding method based on the lower clamping member, and a squaring machine including the lower 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. CN114559569A discloses a method for collecting vertically cut monocrystalline silicon scrap edges. 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 of the edge skin, there is an unavoidable risk of edge skin rollover regardless of whether an upper or lower unraveling strategy is adopted. 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 a lower tensioning member that can keep the edge skin stable during the unwinding process, an unwinding method based on the lower tensioning member, and a squaring machine including the lower tensioning member.

[0004] To solve the above-mentioned technical problems, the present invention provides a lower clamping member for axially fixing the bottom surface of the edge skin formed by cutting a round bar, wherein the bottom surface contour of the edge skin has a cutting edge;

[0005] The lower clamping member includes at least two units and a drive structure independently connected to the units;

[0006] The spacing between at least one of the monomers and the cut edge is different from the spacing between the remaining monomers and the cut edge;

[0007] The driving structure is used to drive the top of the unit to abut against the bottom surface of the edge skin.

[0008] Furthermore, the unit includes a base and a pressure block, the base is connected to the drive structure, the pressure block is disposed on the base, the top surface of the pressure block is higher than the top surface of the base, and 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.

[0009] A further method for removing the cutting line is provided, which uses the aforementioned lower clamping member to perform the process of removing the cutting line.

[0010] Furthermore, by sequentially controlling the monomers, at least one of the monomers abuts against the bottom surface of the edge skin during the retraction process of the cutting line.

[0011] Furthermore, the sequence control is as follows: during the retraction process of the cutting line, the vertical displacement of the pressing blocks is controlled sequentially from the pressing block with the smallest distance from the cutting edge to the pressing block with the largest distance from the cutting edge.

[0012] Furthermore, a squaring machine is provided, including the aforementioned lower clamping member.

[0013] Furthermore, the squaring machine includes an edge cutting structure, a loading and unloading structure, a transfer structure, and an edge receiving structure;

[0014] The lower clamping member is installed in the edge cutting structure;

[0015] 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.

[0016] 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.

[0017] Furthermore, the feeding structure or the unloading structure includes a base platform, two side plates disposed on the base platform, a top block, and a support assembly;

[0018] The side plates are vertically arranged on the surface of the base platform. The two side plates are parallel and spaced apart. Rollers are provided on the inner and outer walls of the side plates. A support assembly is provided at one end of the side plate along its length, and a top block is provided at the other end of the side plate along its length. The top block is located between the two side plates.

[0019] Furthermore, the support assembly includes a guide rail, two sliders disposed on the guide rail, a single plate disposed on the sliders, and a cylinder connected to at least one slider.

[0020] Furthermore, the flipping structure includes a connecting rod, a first connecting seat hinged to one end of the connecting rod, a flipping drive member hinged to the middle of the connecting rod, and a second connecting seat hinged to the flipping drive member.

[0021] Furthermore, the feeding structure is provided in multiple ways, the unloading structure is provided in multiple ways, and the feeding structure and the unloading structure have corresponding flipping structures.

[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 upper top fastener is installed on the upper top structure, and the lower top fastener is installed on the lower top structure.

[0025] Furthermore, the edge skin receiving structure includes an edge skin gripper assembly, an edge skin receiving platform, and an edge skin receiving box placed on the edge skin receiving platform.

[0026] Furthermore, the edge leather gripper assembly includes a mounting frame, an upper edge leather gripper, a lower edge leather gripper, a vertical drive structure, a horizontal drive structure, and a rotating structure;

[0027] The vertical drive structure is mounted on the mounting frame and is used to control the distance between the upper and lower leather grippers.

[0028] The lateral drive structure and the rotation structure are mounted on the mounting frame. The lateral drive structure is used to drive the mounting frame to move laterally, and the rotation structure is used to drive the mounting frame to rotate around the Z-axis.

[0029] Furthermore, both the upper and lower leather grippers are provided with avoidance structures to avoid the upper and lower leather grippers in the transfer structure.

[0030] Furthermore, the bottom of the side box has a limiting structure, and the lower side gripper has a clearance structure to avoid the limiting structure.

[0031] Furthermore, the overall height of the edge receiving box is less than the height of the edge.

[0032] Furthermore, it also includes a traveling vehicle, on which the edge skin receiving box is fixed. The end of the traveling vehicle facing the edge skin gripper structure is provided with a first positioning structure, and the edge skin receiving platform is provided with a second positioning structure that matches the first positioning structure.

[0033] Furthermore, the cutting line forming the cutting edge is a loop.

[0034] The beneficial effects of the present invention are as follows: the lower clamping member provided by the present invention, combined with its specific thread retraction method, can effectively ensure the stability of the cutting line during the thread retraction process, while effectively stabilizing the edge skin. Attached Figure Description

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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;

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Figure 9The diagram shown is a structural schematic of the square-opening machine according to a specific embodiment of the present invention;

[0044] Figure 10 The diagram shown is a schematic representation of the loading and unloading structure in a specific embodiment of the present invention.

[0045] Figure 11 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.

[0046] Figure 12 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.

[0047] Figure 13 The diagram shown is a structural schematic of the flipping structure in a specific embodiment of the present invention;

[0048] Figure 14 The diagram shown is a schematic representation of the transfer structure in a specific embodiment of the present invention.

[0049] Figure 15 The diagram shown is a schematic representation of the edge-cutting structure in a specific embodiment of the present invention.

[0050] Figure 16 The diagram shown is a schematic representation of the edge skin receiving structure in a specific embodiment of the present invention.

[0051] Figure 17 The figure shown is a cross-sectional schematic diagram of the edge skin receiving box in a specific embodiment of the present invention;

[0052] Figure 18 The figure shown is a top view of the total edge skin receiving structure of the present invention in a specific embodiment;

[0053] Figure 19 The diagram shown is a schematic diagram of the feeding or unloading structure of the present invention from another perspective in a specific embodiment.

[0054] Figure 20 As shown Figure 15 Enlarged view of part A in the image. Detailed Implementation

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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 axial fixation of the edge skin during the wire retraction process, regardless of whether an upper or lower retraction strategy is used. Therefore, the inventors provide a novel lower clamping component, which, combined with a specific lower retraction method, can achieve efficient and safe wire retraction while ensuring the stability of the edge skin.

[0060] Specifically, see Figures 1 to 8 As shown, the inventors provide a lower clamping member 34 that can cooperate with an existing upper clamping member 33 to achieve axial fixation of the edge skin 51. The lower clamping member is mounted on the bottom surface of the edge skin, and its top end abuts against the bottom surface of the edge skin to fix the bottom surface of the monocrystalline silicon rod. The lower clamping member is configured to include at least two individual units and a drive structure 343 independently connected to each individual unit. The bottom surface profile of the rod (i.e., the aforementioned monocrystalline silicon rod) has a straight line parallel to the cutting edge of the bottom surface profile of the edge skin. The distance between at least one of the individual units and the straight line is different from the distance between the remaining individual units and the straight line. The drive structure is used to drive the top of the individual units to abut against the bottom surface of the edge skin. It is 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. The straight line is arbitrary in the bottom surface profile of the rod, but preferably a straight line passing through the center of the circle is used as the standard straight line. In a more preferred embodiment, the straight line is the cutting edge, that is, the cutting edge is used as the standard line for arranging the individual units. Therefore, it can be understood that the straight line mentioned below refers to the cutting edge.

[0061] In one optional embodiment, the monomer has a pressure block 342 on top, with adjacent pressure blocks radially staggered along the bottom surface of the monocrystalline silicon rod, i.e., the spacing between at least one pressure block and the straight line is different from the spacing between the remaining pressure blocks and the straight line. In this embodiment, the radially staggered distribution of the pressure blocks ensures that during the wire removal process (radial displacement of the cutting line), at least one pressure block is pressed firmly against the bottom surface of the edge skin, while at least one pressure block is disengaged from the bottom surface of the edge skin, allowing the cutting line to move laterally during removal, thereby ensuring the stability of the edge skin during the removal process. Preferably, in this embodiment, the monomer includes a base 341, pressure blocks 342 disposed on the base, the top surface of the pressure blocks being higher than the top surface of the base, and the base connected to a vertical drive structure 343. The vertical drive structure is used to drive the monomer base and pressure blocks to move toward or away from the bottom surface of the edge skin, i.e., to drive the top of the pressure blocks of the monomer to abut against the bottom surface of the edge skin. During the wire removal process, preferably, the cutting line is located between the top surface of the base and the bottom surface of the single silicon ingot. In this embodiment, the position of the pressure block on the base is arbitrary, but the top surface of the pressure block should be higher than the top surface of the base. The shape of the pressure block is arbitrary in this embodiment and can be selected according to actual process requirements.

[0062] For example, see Figure 20 As shown, Figure 20 This demonstrates the typical installation positions of the lower clamping member and the lower clamping structure. Since the top surface of the lower clamping structure is generally circular, if the lower clamping structure 36 is used as a reference for the position of the clamping block instead of the aforementioned circular rod, it can be seen that the spacing between two adjacent clamping blocks 342 and the lower clamping structure is different, that is, the aforementioned clamping blocks are radially staggered along the bottom surface of the single crystal silicon rod (or along the top surface of the lower clamping structure).

[0063] More specifically, see Figure 1 and Figure 3 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.

[0064] 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.

[0065] 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 of the edge skin is fixed by the upper clamping member 33 and its bottom is fixed by the lower clamping member 34.

[0066] See Figure 4 As shown, the pressure block 342 with a smaller distance from the straight line moves downward to allow the horizontal displacement of the cutting line 311, i.e., the cutting line retracts to between two adjacent pressure blocks 342. During this process, the pressure block with a larger distance from the straight line remains in contact with the bottom surface of the edge skin and is clamped together with the corresponding upper clamping member to ensure the stability of the edge skin 51 during the retraction process. In this embodiment, the retraction direction of the cutting line is tangential to the straight line.

[0067] See Figure 5 As shown, the pressure block 342 with a smaller distance from the straight line moves upward and abuts against the bottom surface of the edge skin 51 again. At this time, the cutting line is located between two adjacent pressure blocks, and its retreating line movement is blocked by the pressure block with a larger distance from the straight line.

[0068] See Figure 6 As shown, the pressure block 342, which is further apart from the straight line, moves downward to allow the cutting line to retract. At this time, the pressure block, which is further apart from the straight line, always remains in contact with the bottom surface of the edge skin and is clamped together with the corresponding upper clamping member to ensure the stability of the edge skin during the retraction process.

[0069] See Figure 7 As shown, the cutting line 311 is completely withdrawn from the lower clamping member 34 and moves to the cutting waiting position.

[0070] See Figure 8 As shown, the pressure block 342, which has a larger linear distance from the edge piece 51, moves upward and re-aggregates against the bottom surface of the edge piece 51. During this process, both pressure blocks simultaneously abut against the bottom surface of the edge piece and cooperate with the upper clamping member to completely clamp the edge piece. This allows the external edge piece clamping structure to pick up and transfer the edge piece from between the two cutting devices.

[0071] based on Figures 1 to 8 As can be seen, the retraction method provided in this paper can be summarized as follows: a retraction process of the cutting line 311 based on at least two individual units, that is, by sequentially controlling the individual units, at least one of the individual units abuts against the bottom surface of the edge skin 51 during the retraction process of the cutting line. In this embodiment, the sequential control is as follows: during the retraction process of the cutting line, the vertical displacement of the pressure blocks is controlled sequentially from the pressure block 342 with the smallest distance from the straight line to the pressure block with the largest distance from the straight line. It should be noted that during the sequential control process, at least one pressure block should be ensured to abut against the bottom surface of the edge skin. For example, when the number of pressure blocks is 2, the other pressure block is only allowed to move downward when one pressure block is completely abutting against the bottom surface of the edge skin. The upward and downward displacement of the pressure blocks can be achieved using the existing general vertical drive structure 343, such as a cylinder.

[0072] Further, a square root extractor is provided, see [link to relevant documentation]. Figure 9 As shown, it includes an edge cutting structure 3 containing the aforementioned lower clamping member 34, as well as an loading / unloading structure 1, a transfer structure 2, and an edge receiving structure 4 (in... Figure 9 (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.

[0073] For details, see Figures 10 to 13 and Figure 19 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.

[0074] In one alternative implementation, see [link to implementation details]. Figure 11 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.

[0075] In one alternative implementation, see [link to implementation details]. Figure 11 As 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 12 .

[0076] In one alternative implementation, see [link to implementation details]. Figure 13 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.

[0077] See Figure 19 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.

[0078] In one alternative implementation, see [link to implementation details]. Figure 10As 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.

[0079] In one implementation, see Figure 9 and Figure 14 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.

[0080] 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 14As 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.

[0081] In one implementation, see Figure 15 (Cut lines omitted) As shown, the edge cutting structure includes a main frame 39, two opposing cutting structures 37, an upper top structure 32, and a lower top structure 36. The cutting structures are mounted on the main frame, and the upper top structure is mounted on the main frame and located between the two cutting structures. Both the main frame and the lower top structure are fixed to a support platform 38. The lower top structure and the upper top structure are mounted axially aligned. An upper top clamping member 33 is mounted on the upper top structure, and a lower top clamping member 34 is mounted on the lower top structure. The upper top structure has an independent vertical drive structure.

[0082] 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.

[0083] 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.

[0084] The upper and lower structures are general structures, as shown in CN114474437A, CN218365781U or CN217144436U.

[0085] Specifically, regarding the process, see [link / reference]. Figures 1 to 8 and Figure 15Based on the length of the round rod measured by the round rod 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 rod 5 to be placed between the upper and lower top structures while the upper top structure is driven by the vertical driving structure to press against the top surface of the round rod. When the round rod (a single-crystal silicon rod with a circular cross-section) is clamped by the upper and lower top structures, the upper clamping member 33 presses against the upper surface of the edge skin (any position on the top surface of the edge skin after pre-calculation). 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 skin cutting position. After the cutting line moves to the edge skin cutting position, the upper clamping member moves downward as a whole to re-press against the upper surface of the edge skin. After the cutting line has completely cut the edge skin, the lower clamping member moves up and down during the cutting line retraction process, thereby retracting the cutting line. After the cutting line retraction is complete, the cutting structure returns to the cutting waiting position or moves to the furthest permissible end (relative to the axis of the round bar). At this time, the edge skin clamping structure extends between the two cutting structures, with the upper edge skin clamping jaws holding the top of the edge skin and the lower edge skin clamping jaws holding the bottom surface of the edge skin. After the upper and lower clamping members are completely released, the edge skin clamping structure removes the edge skin and performs a transfer action. When the rotating structure transfers the square bar clamping structure to the cutting position corresponding to the edge skin cutting structure, the square bar clamping jaws extend between the cutting structures and clamp the sides of the square bar. At this time, the upper and lower clamping structures release their clamping of the square bar, allowing the square bar clamping structure to remove the square bar and perform the transfer process. In one optional embodiment, during the transfer of the edge-gripping structure, the square bar gripping structure gradually rotates to the cutting station; during the transfer 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 in 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.

[0086] 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 15Its structure is a general structure, including at least one driving wheel 312, a tensioning wheel 313, and two guide wheels (or driven wheels) 314, or see CN212218920U or CN217098379U. The tensioning wheel adjusts the tension of the cutting wire using a counterweight or a motor; the specific adjustment method is existing technology, such as see CN113997436A or CN213593322U. Furthermore, in this embodiment, the cutting wire is preferably a ring-shaped diamond wire, meaning the cutting wire is connected end-to-end, unlike existing long wires (where the first and second ends are not connected).

[0087] It should also be noted that, Figure 15 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.

[0088] In one implementation, see Figure 16 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 around the Z-axis. Both the upper and lower edge leather grippers are provided with 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 17 As shown, this structure is the general structure of the applicant's prior application. 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, a hole 442 is formed between the limiting structure and the outer shell of the edge skin box 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.

[0089] In one alternative embodiment, the lower gripper has an independent lateral drive structure (in... Figure 16(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.

[0090] 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.

[0091] 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 stored in the edge skin receiving box, the lower edge skin gripper passes out from the hole and the edge skin gripper assembly is reset.

[0092] 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.

[0093] In another preferred embodiment, see Figures 16 to 18 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. The edge leather receiving platform 42 is provided with a second positioning structure 421 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 to facilitate the positioning process.

[0094] 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 lower clamping member for axially fixing the bottom surface of a strip formed by cutting a round bar, wherein the bottom surface contour of the strip has a cut edge, characterized in that, The lower clamping member includes at least two units and a drive structure independently connected to the units; The unit includes a base and a pressure block. The base is connected to the driving structure. The pressure block is disposed on the base, and the top surface of the pressure block is higher than the top surface of the base. The distance between at least one pressure block and the cutting edge is different from the distance between the other pressure blocks and the cutting edge. The driving structure is used to drive the top of the unit to abut against the bottom surface of the edge skin. During the retraction of the cutting line, at least one unit always abuts against the bottom surface of the edge skin.

2. A method for removing threads, characterized in that, The lower clamping member as described in claim 1 is used for the retraction process of the cutting line.

3. The unwinding method according to claim 2, characterized in that, By sequentially controlling the monomers, at least one of the monomers abuts against the bottom surface of the edge skin during the retraction of the cutting line.

4. The unwinding method according to claim 3, characterized in that, The sequence control is as follows: during the retraction process of the cutting line, the vertical displacement of the pressure blocks is controlled 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.

5. A square rooting machine, characterized in that, Includes the lower clamping member as described in claim 1.

6. The square root extractor according to claim 5, characterized in that, This includes the edge cutting structure, loading and unloading structure, transfer structure, and edge receiving structure; The lower clamping member is installed in the edge cutting structure; 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.

7. The square root extractor according to claim 6, characterized in that, 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.

8. The square root extractor according to claim 6, characterized in that, 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; 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 upper top clamping member is installed on the upper top structure, and the lower top clamping member is installed on the lower top structure.

9. The square root extractor according to any one of claims 6 to 8, characterized in that, The cutting line that forms the cutting edge is a loop.

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