Processing method of photovoltaic slicing main roller and photovoltaic slicing main roller
By setting up threaded wire grooves with reduced spacing on the main roller of the silicon wafer cutting equipment, the problem of inconsistent matching between the main roller and the steel wire is solved, the jumping rate and disconnection rate of the wire net are reduced, and the silicon wafer is improved production efficiency and yield rate.
Patent Information
- Application Number
- CN202411495230.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2024-12-17
AI Technical Summary
In existing silicon wafer cutting equipment, the inconsistent fit between the main roller and the steel wire leads to a high jump rate of the wire mesh and a high break rate of the tungsten wire, affecting the production efficiency and the yield rate of the silicon wafer.
By etching a threaded wire groove on the outer periphery of the main roller, there are grooves between adjacent teeth, and the spacing of grooves decreases in the first direction, reducing the difference in wear of the steel wire, and improving the degree of fit and constraint.
The jumper rate and disconnection rate of the steel wire are reduced, the thickness consistency of the silicon wafer is ensured, and the production efficiency and yield rate are improved.
Smart Images
Figure CN119140854A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of silicon wafer processing, and in particular to a processing method of a photovoltaic slicing main roller and a photovoltaic slicing main roller. Background Art
[0002] With the development of photovoltaic technology, photovoltaic cells are being used more and more widely, and the market demand for monocrystalline silicon, one of the raw materials for photovoltaic cells, is also increasing. In the production process of monocrystalline silicon wafers, the monocrystalline silicon rods grown in the single crystal furnace need to be cut into silicon wafers through a wire mesh composed of cutting wires. At present, tungsten wire can achieve thinner silicon wafers than high-carbon steel wire. The cutting wire of current silicon wafer cutting equipment has gradually replaced high-carbon steel wire with tungsten wire. The existing silicon wafer cutting equipment requires the groove of the main roller to be perfectly consistent with the steel wire, but the current steel wire diameter and main roller groove have a certain amount of wear loss during the slicing process, which at least leads to the following problems:
[0003] 1. The wire jump rate of the wire network is high, and the tungsten wire breakage rate is high, which affects production efficiency.
[0004] 2. The wire mesh shakes greatly during the cutting process, resulting in inconsistent thickness of the cut silicon wafers, and the line mark index exceeds the standard, affecting the product yield.
[0005] In summary, in order to overcome the above shortcomings, the present application provides a processing method of a photovoltaic slicing main roller and a photovoltaic slicing main roller. Summary of the invention
[0006] The main purpose of the present invention is to provide a processing method of a photovoltaic slicing main roller and a photovoltaic slicing main roller to solve the problems of low production efficiency and low yield rate of silicon wafers in the prior art.
[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a method for processing a photovoltaic slice main roller is provided, and the processing method comprises: installing the main roller to be processed on a lathe; moving the lathe along a first direction so that the lathe tool grooves the main roller during the rotation of the main roller, so as to form a threaded groove arranged along the first direction on the outer periphery of the main roller, and there are grooves between adjacent teeth of the threaded groove, and the spacing between adjacent grooves decreases along the first direction.
[0008] Optionally, in the process of forming the threaded groove, the tool path of the turning tool includes a tool feed path and a tool retract path that alternate multiple times along the first direction.
[0009] Optionally, the groove includes a first groove, a second groove, a third groove and a fourth groove which are adjacent to each other in sequence along the first direction, the spacing between the first groove and the second groove is a first spacing, the spacing between the second groove and the third groove is a second spacing, and the spacing between the third groove and the fourth groove is a third spacing, and the turning tool is moved so that the difference between the first spacing and the second spacing is equal to the difference between the second spacing and the third spacing.
[0010] According to another aspect of the present invention, a photovoltaic slicing main roller is provided, wherein the outer circumference of the main roller is provided with thread-type wire grooves arranged along a first direction; grooves are provided between adjacent teeth of the thread-type wire grooves, and the spacing between adjacent grooves decreases along the first direction.
[0011] Optionally, the groove includes a first groove, a second groove, a third groove and a fourth groove adjacent to each other in sequence along the first direction, the spacing between the first groove and the second groove is a first spacing, the spacing between the second groove and the third groove is a second spacing, the spacing between the third groove and the fourth groove is a third spacing, and the difference between the first spacing and the second spacing is equal to the difference between the second spacing and the third spacing.
[0012] Optionally, the main roller has a first end and a second end opposite to each other in the axial direction, the end surface of the first end has a first diameter, the end surface of the second end has a second diameter, the first diameter is different from the second diameter, and the axial direction includes the first direction.
[0013] Optionally, when the direction from the first end to the second end is the first direction, the first diameter is smaller than the second diameter.
[0014] Optionally, when the direction in which the second end points to the first end is the first direction, the first diameter is greater than the second diameter.
[0015] Optionally, the groove depths of all grooves are equal.
[0016] Optionally, the angles between the side walls of all the grooves and the vertical direction are equal.
[0017] According to the technical solution of the present invention, in a processing method of a photovoltaic slice main roller, after the main roller to be processed is installed on a lathe, the lathe can be moved along a first direction, and the lathe tool of the lathe can groove the main roller during the rotation of the main roller to be processed, so that a threaded wire groove arranged along the first direction can be formed on the periphery of the processed main roller. There are grooves between adjacent teeth of the threaded wire groove, and the spacing between adjacent grooves decreases along the first direction. Therefore, when the photovoltaic slice main roller in the present application is used as the main roller of the wire net for cutting silicon wafers, the present application reduces the spacing between the groove for falling into the steel wire with less wear and the groove for falling into the steel wire with greater wear in the threaded wire groove, thereby achieving the effect of improving the groove shape of the groove of the main roller threaded wire groove and the steel wire falling into the corresponding groove in the wire net. Therefore, even if the steel wire and the groove of the threaded wire groove of the main roller experience wear during the process of cutting silicon wafers, the groove shape of the groove can have a higher degree of constraint on the steel wire, thereby reducing the wire jump rate and wire break rate of the steel wire in the wire net, and improving the production efficiency of silicon wafers. Furthermore, since the steel wire is gradually worn during the process of cutting silicon wafers, and the spacing between adjacent grooves gradually decreases along the first direction, the amount of wear on the steel wire diameter and the change in the spacing of the threaded grooves can be considered to be in dynamic balance, that is, the amount of wear on the steel wire diameter can be offset by the decreasing spacing. Therefore, when the photovoltaic slicing main roller formed by the processing method of the photovoltaic slicing main roller of the present application is applied to a photovoltaic slicer, the thickness of all silicon wafers cut within a complete cycle from the start of silicon wafer cutting to the completion of silicon wafer cutting can be consistent, thereby improving the thickness concentration of the silicon wafers and making the thickness of the silicon wafers meet the process requirements of the silicon wafers, thereby improving the production yield of the silicon wafers. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:
[0019] Figure 1 A partial cross-sectional schematic diagram of a photovoltaic slicing main roller according to an embodiment of the present invention is shown.
[0020] The above drawings include the following reference numerals:
[0021] 10, old wire; 20, new wire; 100, photovoltaic slicing main roller; 200, groove; 300, steel wire. DETAILED DESCRIPTION
[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0025] As described in the background technology, with the development of photovoltaic technology, photovoltaic cells are more and more widely used, and the market demand for monocrystalline silicon, one of the raw materials of photovoltaic cells, is also increasing. In the production process of monocrystalline silicon wafers, it is necessary to cut the monocrystalline silicon rods grown by the single crystal furnace into silicon wafers through a wire mesh composed of cutting wires. At present, tungsten wire can achieve the cutting of thinner silicon wafers compared with high-carbon steel wire. The cutting wires of current silicon wafer cutting equipment have gradually replaced high-carbon steel wires with tungsten wires. The existing silicon wafer cutting equipment requires the groove type of the main roller to be perfectly consistent with the steel wire, but the current steel wire diameter and main roller groove type have a certain amount of wear loss during the slicing process. The two dynamic wear amounts do not reach the main roller head middle tail groove type and the wire mesh head middle tail beauty in one-knife cutting, resulting in a high jump line rate and a high tungsten wire breakage rate, which affects production efficiency. As a result, the wire mesh shakes greatly during the cutting process, resulting in inconsistent thickness of the cut silicon wafers, and the line mark index exceeds the standard, affecting the product yield. In order to solve the technical problems of low production efficiency of cutting silicon wafers and low yield rate of silicon wafers after cutting in the above-mentioned prior art, the present application provides a processing method of a photovoltaic slicing main roller and a photovoltaic slicing main roller.
[0026] According to one aspect of the present application, an embodiment of the present application provides a method for processing a photovoltaic slicing main roller, the processing method comprising:
[0027] Mount the main roll to be processed on the lathe;
[0028] Specifically, the lathe mentioned above can be a CNC lathe.
[0029] For example, the components of the lathe may include a main shaft, and the main roller to be processed may be fixed on the main shaft, so as to achieve the purpose of installing the main roller to be processed on the lathe. The main shaft may rotate, so as to drive the main roller to be processed fixed on the main shaft to rotate.
[0030] The lathe is moved along the first direction so that the tool of the lathe grooves the main roller during the rotation of the main roller, so as to form a threaded groove arranged along the first direction on the outer periphery of the main roller, wherein adjacent teeth of the threaded groove have grooves, and the spacing between adjacent grooves decreases along the first direction.
[0031] Specifically, for the main roller after processing, the outer circumference thereof is provided with a thread-type wire groove along the first direction, so that the continuously protruding solid part of the outer circumference of the main roller after processing can be called a tooth, and at this time, for two adjacent teeth, the outer circumference of the main roller after processing can have a groove, and the groove is located between the adjacent teeth. It can be understood that after the steel wire (diamond wire) is laid, the steel wire can fall into the above-mentioned groove.
[0032] Optionally, in the case where the lathe is a CNC lathe, the processing method of the photovoltaic slicing main roller may further include: inputting a preset program into the CNC lathe, and the processing parameters in the preset program may include but are not limited to: the distance between the first groove near the end of the main roller and the end, the diameter of the main roller to be processed, the distance between the first groove and the last groove in the first direction, the blade angle of the turning tool, the depth of each groove, the taper of the main roller, the fillet radius of the bottom of each groove (the radius of the arc portion where the bottom of each groove connects with the side wall), the length of the main roller in the first direction, the length of the main roller that does not need to be grooved at any end in the first direction, the length of the main roller that needs to be grooved in the first direction, the angle between the side wall of each groove and the vertical direction, the angle between the two side walls in the groove cross section, the diameter of the main roller after processing, the average spacing of all grooves of the threaded groove, the total number of grooves, the change in the spacing of the grooves, the rotation speed of the main roller, the finishing allowance, the change in the spacing between grooves adjacent to each other in the first direction, etc. Thereby, the CNC lathe automatically completes the processing steps of the photovoltaic slice main roller according to the program, so that the outer periphery of the finally formed main roller is provided with a threaded groove arranged along the first direction, and there are grooves between adjacent teeth of the above-mentioned threaded grooves, and the spacing between adjacent grooves decreases along the first direction.
[0033] It is mentioned here that the process of processing the main roller to be processed can include rough machining and fine machining. Among them, rough machining is used to use a larger cutting depth to quickly carve out the approximate shape of the main roller, and fine machining is used to use a smaller cutting depth and a higher cutting speed to accurately achieve the design size and surface roughness requirements. In order to make the main roller meet the dimensional accuracy and surface roughness required by the process, a machining allowance, i.e., a fine machining allowance, needs to be reserved in the fine machining (finishing) stage.
[0034] According to the technical solution of the present invention, in a processing method of a photovoltaic slice main roller, after the main roller to be processed is installed on a lathe, the lathe can be moved along a first direction, and the lathe tool of the lathe can groove the main roller during the rotation of the main roller to be processed, so that a threaded wire groove arranged along the first direction can be formed on the periphery of the processed main roller. There are grooves between adjacent teeth of the threaded wire groove, and the spacing between adjacent grooves decreases along the first direction. Therefore, when the photovoltaic slice main roller in the present application is used as the main roller of the wire net for cutting silicon wafers, the present application reduces the spacing between the groove for falling into the steel wire with less wear and the groove for falling into the steel wire with greater wear in the threaded wire groove, thereby achieving the effect of improving the groove shape of the groove of the main roller threaded wire groove and the steel wire falling into the corresponding groove in the wire net. Therefore, even if the groove of the steel wire and the groove of the threaded wire groove of the main roller experience wear during the process of cutting silicon wafers, the groove shape of the groove can have a higher degree of constraint on the steel wire, thereby reducing the wire jump rate and wire break rate of the steel wire in the wire net, and improving the production efficiency of silicon wafers. Furthermore, since the steel wire is gradually worn during the process of cutting silicon wafers, and the spacing between adjacent grooves gradually decreases along the first direction, the amount of wear on the steel wire diameter and the change in the spacing of the threaded grooves can be considered to be in dynamic balance, that is, the amount of wear on the steel wire diameter can be offset by the decreasing spacing. Therefore, when the photovoltaic slicing main roller formed by the processing method of the photovoltaic slicing main roller of the present application is applied to a photovoltaic slicer, the thickness of all silicon wafers cut within a complete cycle from the start of silicon wafer cutting to the completion of silicon wafer cutting can be consistent, thereby improving the thickness concentration of the silicon wafers and making the thickness of the silicon wafers meet the process requirements of the silicon wafers, thereby improving the production yield of the silicon wafers.
[0035] In some optional embodiments, in the process of forming the above-mentioned threaded groove, the tool path of the above-mentioned turning tool includes a feed path and a retract path that are alternated multiple times along the above-mentioned first direction.
[0036] Specifically, the turning tool carves one by one along the first direction from one end of the main roller to be processed, so that the outer circumference of the main roller forms a thread-type linear groove arranged along the first direction. In addition, during the above-mentioned carving process, the turning tool itself will also perform positional movement relative to the right-handed Cartesian coordinate system. At this time, for any groove carved by the knife, the overall trend of the tool path of the turning tool is still along the first direction, so that the tool path of the turning tool includes a plurality of alternate feed paths and retract paths along the first direction.
[0037] In the above embodiment, since the overall trend of the tool path during the engraving process is fixed in the same direction, the occurrence of return errors is avoided during the tool path, thereby improving the accuracy of the fillet radius at the bottom of each groove on the main roller, thereby improving the processing accuracy of the photovoltaic slicing main roller.
[0038] In some optional embodiments, the grooves include a first groove, a second groove, a third groove and a fourth groove which are adjacent to each other in sequence along the first direction, the spacing between the first groove and the second groove is a first spacing, the spacing between the second groove and the third groove is a second spacing, and the spacing between the third groove and the fourth groove is a third spacing, and the turning tool of the lathe is moved so that the difference between the first spacing and the second spacing is equal to the difference between the second spacing and the third spacing.
[0039] In the above embodiment, when the total wear amount of the steel wire in all the grooves of the main roller is evenly distributed, in order to improve the fit between the groove type of the groove of the main roller threaded groove and the steel wire falling into the corresponding groove in the wire mesh, the difference between the first spacing and the second spacing can be equal to the difference between the second spacing and the third spacing. Specifically, the groove can be cut by moving the tool of the lathe along the first direction. During the groove cutting process, the feeding distance of the lathe during the groove cutting process can be changed, that is, the lathe can perform regular variable pitch motion, thereby reducing the groove pitch, so that the difference between the first spacing and the second spacing is equal to the difference between the second spacing and the third spacing.
[0040] According to another aspect of the present application, Figure 1 As shown, an embodiment of the present application provides a photovoltaic slicing main roller 100, the outer periphery of which is provided with threaded wire grooves arranged along a first direction A; there are grooves 200 between adjacent teeth of the above-mentioned threaded wire grooves, and the spacing between adjacent above-mentioned grooves 200 decreases along the first direction A.
[0041] In the above embodiment, the outer circumference of the photovoltaic slicing main roller 100 after processing has thread-type wire grooves arranged along the first direction A. Furthermore, there are grooves 200 between adjacent teeth of the above-mentioned threaded wire groove, and the spacing between adjacent grooves 200 decreases along the first direction A. Therefore, when the photovoltaic slicing main roller 100 in the present application is used as the main roller of the wire mesh for cutting silicon wafers, since the present application reduces the spacing between the grooves 200 for falling into the steel wire 300 with a smaller amount of wear and the grooves 200 for falling into the steel wire 300 with a larger amount of wear in the threaded wire groove, the effect of improving the groove shape of the groove 200 of the threaded wire groove of the photovoltaic slicing main roller 100 and the steel wire 300 falling into the corresponding groove 200 in the wire mesh is achieved. Therefore, even if the steel wire 300 and the groove 200 of the threaded wire groove of the photovoltaic slicing main roller 100 experience wear during the process of cutting silicon wafers, the groove shape of the groove 200 can also have a higher degree of constraint on the steel wire 300, thereby reducing the wire jump rate and wire break rate of the steel wire 300 in the wire mesh, thereby improving the production efficiency of silicon wafers. Furthermore, since the steel wire 300 is gradually worn during the process of cutting silicon wafers, and the spacing between adjacent grooves 200 gradually decreases along the first direction A, the wear amount of the steel wire 300 diameter and the change in the spacing of the threaded grooves can be considered to be in dynamic balance, that is, the wear amount of the steel wire 300 diameter can be offset by the decreasing spacing. Therefore, when the photovoltaic slicing main roller 100 formed by the processing method of the photovoltaic slicing main roller 100 of the present application is applied to a photovoltaic slicer, the thickness of all silicon wafers cut out can be consistent within a complete cycle from the start of silicon wafer cutting to the completion of silicon wafer cutting, thereby improving the thickness concentration of the silicon wafers and making the thickness of the silicon wafers meet the process requirements of the silicon wafers, thereby improving the production yield of the silicon wafers.
[0042] In order to improve the fit between the groove type of the groove 200 of the threaded wire groove on the photovoltaic slicing main roller 100 and the steel wire 300 falling into the corresponding groove 200 in the wire net, in some optional embodiments, another photovoltaic slicing main roller 100 is provided, the outer circumference of the photovoltaic slicing main roller 100 is provided with a threaded wire groove arranged along the first direction A, and there are grooves 200 between adjacent teeth of the threaded wire groove, and the spacing between adjacent grooves 200 decreases along the first direction A. Among them, the number of grooves 200 of the threaded wire groove is multiple, and the multiple grooves 200 may include a first groove, a second groove, a third groove and a fourth groove that are adjacent in sequence along the first direction A, the spacing between the first groove and the second groove is a first spacing, the spacing between the second groove and the third groove is a second spacing, the spacing between the third groove and the fourth groove is a third spacing, and the difference between the first spacing and the second spacing is equal to the difference between the second spacing and the third spacing.
[0043] In some optional embodiments, the photovoltaic slicing main roller 100 has a first end and a second end relative to each other in the axial direction, the end face of the first end has a first diameter R1, and the end face of the second end has a second diameter r1. In order to make the photovoltaic slicing main roller 100 have a certain taper, the first diameter R1 and the second diameter may be different.
[0044] Specifically, the axial direction of the photovoltaic slicing main roller 100 can be a first direction A or a second direction, wherein the first direction A is opposite to the second direction.
[0045] Optionally, when the direction from the first end to the second end is the first direction A, the first diameter R1 is smaller than the second diameter r1.
[0046] Optionally, when the direction in which the second end points to the first end is the first direction A, the first diameter R1 is greater than the second diameter r1.
[0047] Since the new wire 20 is not worn, the diameter of the new wire 20 (unworn steel wire 300) will be larger than the diameter of the worn old wire 10 (worn steel wire 300), so the length of the steel wire 300 required for wiring a circle at the bottom of the groove 200 on the first end side of the photovoltaic slicing main roller 100 is not equal to the length of the steel wire 300 required for wiring a circle at the bottom of the groove 200 on the second end side. Therefore, in the above embodiment, the first diameter of the end face of the first end is different from the second diameter of the end face of the second end, and the side with a larger end face diameter of the photovoltaic slicing main roller 100 corresponds to the side with a smaller spacing between the grooves 200, so that the photovoltaic slicing main roller 100 has a certain taper to balance the wire mesh planes of the new wire 20 and the old wire 10, and to tighten the old wire 10 to ensure that the wire bow value of the wire mesh of the new wire 20 can be equal to the wire bow value of the wire mesh of the old wire 10. Exemplarily, the taper of the photovoltaic slicing main roller 100 can be 0.025mm.
[0048] Optionally, the groove depths of all the grooves 200 may be equal.
[0049] Optionally, the angles between the side walls of all the grooves 200 and the vertical direction may be equal.
[0050] Optionally, the fillet radii of the groove bottoms of all the grooves 200 may be equal.
[0051] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
[0052] According to the technical solution of the present invention, in a processing method of a photovoltaic slice main roller, after the main roller to be processed is installed on a lathe, the lathe can be moved along a first direction, and the lathe tool of the lathe can groove the main roller during the rotation of the main roller to be processed, so that a threaded wire groove arranged along the first direction can be formed on the periphery of the processed main roller. There are grooves between adjacent teeth of the threaded wire groove, and the spacing between adjacent grooves decreases along the first direction. Therefore, when the photovoltaic slice main roller in the present application is used as the main roller of the wire net for cutting silicon wafers, the present application reduces the spacing between the groove for falling into the steel wire with less wear and the groove for falling into the steel wire with greater wear in the threaded wire groove, thereby achieving the effect of improving the groove shape of the groove of the main roller threaded wire groove and the steel wire falling into the corresponding groove in the wire net. Therefore, even if the steel wire and the groove of the threaded wire groove of the main roller experience wear during the process of cutting silicon wafers, the groove shape of the groove can have a higher degree of constraint on the steel wire, thereby reducing the wire jump rate and wire break rate of the steel wire in the wire net, and improving the production efficiency of silicon wafers. Furthermore, since the steel wire is gradually worn during the process of cutting silicon wafers, and the spacing between adjacent grooves gradually decreases along the first direction, the amount of wear on the steel wire diameter and the change in the spacing of the threaded grooves can be considered to be in dynamic balance, that is, the amount of wear on the steel wire diameter can be offset by the decreasing spacing. Therefore, when the photovoltaic slicing main roller formed by the processing method of the photovoltaic slicing main roller of the present application is applied to a photovoltaic slicer, the thickness of all silicon wafers cut within a complete cycle from the start of silicon wafer cutting to the completion of silicon wafer cutting can be consistent, thereby improving the thickness concentration of the silicon wafers and making the thickness of the silicon wafers meet the process requirements of the silicon wafers, thereby improving the production yield of the silicon wafers.
[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A method for processing a photovoltaic slice main roller, characterized in that: include: Mount the main roll to be processed on the lathe; The lathe is moved along a first direction so that the tool of the lathe grooves the main roller during the rotation of the main roller, so as to form a threaded groove arranged along the first direction on the outer circumference of the main roller, wherein adjacent teeth of the threaded groove have grooves, and the spacing between adjacent grooves decreases along the first direction.
2. The processing method according to claim 1, characterized in that: In the process of forming the threaded groove, the tool path of the turning tool includes a feed path and a retract path that are alternately performed multiple times along the first direction.
3. The processing method according to claim 1, characterized in that: The grooves include a first groove, a second groove, a third groove and a fourth groove which are adjacent to each other in sequence along the first direction, the spacing between the first groove and the second groove is a first spacing, the spacing between the second groove and the third groove is a second spacing, and the spacing between the third groove and the fourth groove is a third spacing, and the turning tool is moved so that the difference between the first spacing and the second spacing is equal to the difference between the second spacing and the third spacing.
4. A photovoltaic slicing main roller, characterized in that: The outer circumference of the main roller is provided with a thread-shaped wire groove arranged along a first direction; There are grooves between adjacent teeth of the threaded wire groove, and the spacing between adjacent grooves decreases along the first direction.
5. The photovoltaic slicing main roller according to claim 4, characterized in that: The grooves include a first groove, a second groove, a third groove and a fourth groove which are adjacent to each other in sequence along the first direction, a spacing between the first groove and the second groove is a first spacing, a spacing between the second groove and the third groove is a second spacing, a spacing between the third groove and the fourth groove is a third spacing, and a difference between the first spacing and the second spacing is equal to a difference between the second spacing and the third spacing.
6. The photovoltaic slicing main roller according to claim 4, characterized in that: The main roller has a first end and a second end opposite to each other in the axial direction, the end surface of the first end has a first diameter, the end surface of the second end has a second diameter, the first diameter is different from the second diameter, and the axial direction includes the first direction.
7. The photovoltaic slicing main roller according to claim 6, characterized in that: When the direction from the first end to the second end is the first direction, the first diameter is smaller than the second diameter.
8. The photovoltaic slicing main roller according to claim 6, characterized in that: When the direction in which the second end points to the first end is the first direction, the first diameter is greater than the second diameter.
9. The photovoltaic slicing main roller according to any one of claims 4 to 8, characterized in that: The groove depths of all the grooves are equal.
10. The photovoltaic slicing main roller according to any one of claims 4 to 8, characterized in that: The included angles between the side walls of all the grooves and the vertical direction are equal.