Tungsten-based rigid wire base line straightening method and system for photovoltaic cell panel silicon wafer cutting
By directly passing the current into the baseline of the diamond wire for cutting the photovoltaic panel silicon wafer, it is in a short-circuit state and quickly heated to a tempered state, the problems of low heating efficiency, complex equipment and high environmental requirements in the prior art are solved, and fast and effective baseline straightening and improved cutting accuracy and efficiency are achieved.
Patent Information
- Application Number
- CN202510571843.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-06-20
AI Technical Summary
In the prior art, the baseline alignment method for photovoltaic panel silicon wafer cutting has problems such as low heating efficiency, complex equipment and high environmental requirements.
A current is directly supplied to the baseline of the diamond wire to be straightened, so that it is in a short-circuit state and is quickly heated to a tempered state, thereby achieving the straightening of the baseline. This method is simple to use and has low environmental requirements. You only need to add a windshield to the heating section to maintain stable heating.
By directly entering the current to heat the diamond wire baseline, rapid and effective straightening is achieved, cutting accuracy and efficiency are improved, and equipment complexity and environmental requirements are reduced.
Smart Images
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Figure HDA0005387350050000012
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of diamond wire baseline alignment for solar photovoltaic cell panel silicon wafer cutting, and specifically relates to a tungsten-based diamond wire baseline alignment method and system for photovoltaic cell panel silicon wafer cutting. Background Art
[0002] The production of solar photovoltaic panels is a complex process, one of which is slicing, which is to use cutting equipment to cut silicon ingots and silicon rods into thin slices, namely silicon wafers. The commonly used silicon wafer thickness is between 180-220 microns. The cutting wires used in wire cutting mainly have the following types and characteristics:
[0003] Traditional steel wire is usually copper-plated steel wire. In multi-wire cutting processing, the steel wire acts as a carrier, driving the silicon carbide abrasive through high-speed movement, moving between the steel wire and the crystal rod to achieve cutting of silicon crystal materials.
[0004] Diamond wire, a layer of 0.001-0.05mm diameter diamond particles is solidified on the surface of the ultra-fine metal base line. The working principle is to use the high hardness and wear resistance of diamond to cut silicon ingots or silicon rods through the high-speed movement of the wire saw, which can achieve high-precision and high-efficiency cutting. The main parameters are that the diameter of the mother wire is generally between 40 microns and 400 microns.
[0005] The importance of diamond wire baseline straightening. If the baseline of the diamond wire is bent or not straight during the production process, it will cause uneven force on the diamond wire during the cutting process. This will not only affect the cutting accuracy and efficiency, but may also cause uneven cutting surface and even wire breakage, affecting product quality and production progress.
[0006] Straightening methods include mechanical straightening and heat treatment straightening. Mechanical straightening usually uses special straightening equipment to apply a certain external force to the baseline, so that it passes between rollers or molds, and uses mechanical force to correct the curvature of the baseline. This method is suitable for diamond wire baselines with larger diameters and can quickly and effectively perform preliminary straightening of the baseline.
[0007] Heat treatment straightening: For some baselines made of special materials, heat treatment can be used. The baseline is heated to a certain temperature and then, under specific cooling conditions, the internal stress of the baseline is released and redistributed, thus achieving the purpose of straightening. This method can achieve relatively precise straightening without damaging the material properties of the baseline. Currently, the main method of heat treatment straightening is to heat the baseline by means of thermal radiation. For the selection of the thermal radiation source, infrared lamps are selected as the radiation source in the existing technology, or a heating furnace is used, and the thermal radiation generated by the heating elements inside can act uniformly on the baseline. For such heating methods, the baseline is usually placed in a closed or low-convection environment to reduce heat dissipation, such as heating the baseline in a heating furnace or in a space with a heat preservation cover. The method of heating and straightening the baseline in the existing technology has low heating efficiency, relatively complex equipment, and high environmental requirements. Summary of the Invention
[0008] The purpose of the present invention is to solve the problems existing in the prior art and provide a tungsten-based diamond wire baseline straightening method and system for cutting silicon wafers of photovoltaic panels. By directly passing an electric current through the baseline to make it heat up for straightening, the equipment is simple, the environmental requirements are low, and only a windproof cover needs to be added in the heating section to maintain stable heating.
[0009] The technical solution adopted by the present invention to solve the above technical problems is as follows:
[0010] A tungsten-based diamond wire baseline straightening method for cutting silicon wafers of photovoltaic panels, including the steps of wire feeding, tensioning, heating, cooling, wire counting, and wire arranging and winding. The feature is that in the heating step, current is passed through one or several sections of the baseline to make it in a short-circuit state and quickly heated to the tempering state. The specific steps are as follows:
[0011] The first step is wire feeding. Place the baseline spool on the wire feeding component, pull out the head of the baseline, and fix it on the empty spool on the wire arranging and winding component.
[0012] The second step is layout, which is carried out in the following order: the baseline is pressed on the wire pressing and tensioning component - the wire pressing wheel is pressed on the baseline - the baseline is pressed on the A conductive wheel - the B conductive wheel is pressed on the baseline - the baseline is pressed on the C conductive wheel - the wire counting wheel is pressed on the baseline - the baseline is pressed on the guiding wheel.
[0013] The third step is to adjust the wire pressing wheel to make the tension meet the requirements.
[0014] The fourth step is to apply power to the first heating section. Apply voltage between the A conductive wheel and the B conductive wheel through a wire to make the current reach the specified value; after adjustment, cut off the power.
[0015] The fifth step is to apply power to the second heating section. Apply voltage between the B conductive wheel and the C conductive wheel through a wire to make the current reach the specified value; after adjustment, cut off the power.
[0016] Step 6: Energize and heat the two heating sections.
[0017] Step 7: Start the motors on the wire pay-off component and the wire winding and paying-off component simultaneously, and keep the motors at these two locations driving the wire pay-off spool and the wire winding spool to run synchronously.
[0018] According to requirements, the number of heating sections can be increased or decreased.
[0019] According to requirements, the distance between the wire counting wheel and the conductive wheel can be adjusted to adjust the length of the cooling section.
[0020] A tungsten-based diamond wire baseline straightening system for cutting silicon wafers of photovoltaic panels includes an active wire pay-off component, a wire pressing tension component, an energized heating unit, a wire winding and paying-off component, a wind shield, and a control cabinet. Its characteristics are as follows: The active wire pay-off component includes a spool and a motor, and the motor drives the spool to rotate. The wire pressing tension component consists of pulleys fixed on columns. The energized heating unit includes several heating sections, such as heating section A and heating section B. Each heating section consists of two conductive wheels and a section of baseline. The conductive wheels are connected to the power supply through wires. The wire winding and paying-off component includes a spool and a motor, and the motor drives the spool to rotate. A wire counting wheel is arranged before the guiding wheel to measure the length of the straightened baseline and the wire running speed. The wind shield surrounds the heating section, and gaps for accommodating the baseline are provided on both sides. The wind shield is rectangular in shape with no cover on all four sides and is made of a transparent material. The control cabinet is connected to the wire counting wheel and the motor control module through data lines.
[0021] The motor is a servo motor.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] The present invention adopts a method of setting heating sections on the baseline to be straightened, applying a certain voltage at both ends of the heating section to make the heating section in a short-circuit state with a large current, quickly heating to the tempering state, achieving the effect of straightening the baseline, and adjusting the straightening effect by adjusting basic parameters such as the straightening voltage, straightening speed, and straightening tension. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a schematic structural diagram of the system of the present invention;
[0025] Figure 2 is Figure 1 a top view of the structure shown.
[0026] In the figure: 1 - active wire pay-off component; 2 - wire pressing tension component; 3 - wire pressing wheel; 4 - conductive wheel A; 5 - conductive wheel B; 6 - conductive wheel C; 7 - wind shield; 8 - wire a; 9 - wire b; 10 - wire c; 11
[0027] —Control cabinet; 11-1—Current and voltage display device; 11-2—Control panel; 12—Wire counting wheel; 13—Guide wheel; 14—Wire winding and unwinding component; 15—Cooling section; 16—Second heating section; 17—First heating section; 18—Tensioning section; 19—Base. Detailed implementation mode
[0028] A tungsten-based diamond wire baseline straightening method for cutting silicon wafers of photovoltaic panels includes the steps of wire feeding, tensioning, heating, cooling, wire counting, and wire winding and unwinding. The feature is that in the heating step, current is passed through one or several sections of the baseline to make it in a short-circuit state and quickly heated to the tempering state. The specific steps are as follows:
[0029] First step, wire feeding: Place the baseline spool on the active wire feeding component 1, pull out the head of the baseline, and fix it on the empty spool on the wire winding and unwinding component 14.
[0030] Second step, layout: Carry out in the following order: Press the baseline on the wire pressing tension component 2—the wire pressing wheel 3 presses on the baseline—the baseline presses on the A conductive wheel 4—the B conductive wheel 5 presses on the baseline—the baseline presses on the C conductive wheel 6—the wire counting wheel 12 presses on the baseline—the baseline presses on the guide wheel 13.
[0031] Third step, adjust the wire pressing wheel 3 to make the tension meet the requirements.
[0032] Fourth step, apply power to the first heating section: Apply voltage between the A conductive wheel 4 and the B conductive wheel 5 through a wire to make the current reach the specified value; after adjustment, cut off the power.
[0033] Fifth step, apply power to the second heating section: Apply voltage between the B conductive wheel 5 and the C conductive wheel 6 through a wire to make the current reach the specified value; after adjustment, cut off the power.
[0034] Sixth step, energize and heat the two heating sections.
[0035] Seventh step, start the motors on the wire feeding component 1 and the wire winding and unwinding component 14 simultaneously, and keep the motors at these two places driving the wire feeding spool and the wire winding spool to run synchronously.
[0036] Eighth step, the straightening effect can be finely adjusted by adjusting the following basic parameters, namely the straightening voltage, the straightening speed, and the straightening tension.
[0037] This method is also applicable to the straightening of black tungsten wires and molybdenum wires with a diameter of 0.02 - 0.2 mm.
[0038] Such as Figure 1 And Figure 2As shown, a tungsten-based diamond wire baseline straightening system for cutting silicon wafers of photovoltaic panels includes an active wire feeding component 1, a baseline tensioning unit, a wind shield 7, a control cabinet 11, a wire counting wheel 12, a wire winding and unwinding component 14, and a base 19. Its characteristics are as follows: It further includes an electrified heating unit. The electrified heating unit includes several heating sections, such as the first heating section baseline 17 and the second heating section baseline 16. Each heating section is composed of two conductive wheels and a section of heating baseline. The conductive wheels are connected to the power supply through wires, that is
[0039] Conductive wheel A 4, the first heating section baseline 17, and conductive wheel B 5 form a heating section;
[0040] Conductive wheel B 5, the second heating section baseline 16, and conductive wheel C 6 form the second heating section;
[0041] Conductive wheel A 4 is connected to the power supply through wire a 8;
[0042] Conductive wheel B 5 is connected to the power supply through wire b 9;
[0043] Conductive wheel C 6 is connected to the power supply through wire c 10;
[0044] The conductive wheel A 4, conductive wheel B 5, and conductive wheel C 6 are respectively connected to their own columns through connecting rods and can be adjusted in height;
[0045] The wind shield 7 surrounds the heating section. There are gaps on both sides for accommodating the baseline. The wind shield is rectangular in shape with no cover on all four sides and is made of a transparent material;
[0046] The active wire feeding component 1 includes a baseline spool and a motor. The motor drives the baseline spool to rotate;
[0047] The baseline tensioning unit is composed of a wire pressing tension component 2 and a wire pressing wheel 3. The wire pressing tension component 2 is composed of pulleys fixed on the columns and is fixedly connected to the base 19 through the columns. The wire pressing wheel 3 is connected to the column of the wire pressing tension component 2 through a connecting rod and can be adjusted in height to adjust the tightness of the tensioning section 18;
[0048] The control cabinet 11 includes a voltage and current display and control unit and a control panel. The voltage and current display control unit displays the voltage and current of the heating section. The control panel is connected to the control module on the motor and the control module on the wire counting wheel through data lines. The start and stop of the motor can be operated on the control panel, and the speed of the motor can be controlled. Whether it meets the requirements can be judged according to the displayed straightening voltage and current, and the current of the heating section can be adjusted accordingly;
[0049] The wire winding and unwinding component 14 includes a wire winding spool and a motor. The wire winding spool is driven by the motor;
[0050] The guide wheel 13 is arranged on the fixed upright of the wire counting wheel 12, which can guide the baseline to be evenly and neatly wound on the spool;
[0051] The heating section can be increased or decreased as needed;
[0052] The distance between the upright of the wire counting wheel 12 and the upright of the conductive wheel can be adjusted to adjust the length of the cooling section 15.
Claims
1. A method for straightening the baseline of a tungsten-based rigid wire for cutting silicon wafers of photovoltaic panels, including wire release, tensioning, heating, cooling, wire counting, and wire collection, is characterized by: The heating process is to pass current through one or several segments of the baseline to make it short-circuit and quickly heat it to the tempering state. The specific steps are as follows: The first step is to pay out the line, placing the baseline spool on the active pay-out component (1), pulling out the baseline head end, and fixing it on the empty spool on the take-up and discharge component (14); The second step is layout, which is carried out in the following order: the baseline is pressed on the pressure wire tension component (2) - the pressure wire wheel (3) is pressed on the baseline - the baseline is pressed on the A conductive wheel (4) - the B conductive wheel (5) is pressed on the baseline - the baseline is pressed on the C conductive wheel (6) - the thread counting wheel (12) is pressed on the baseline - the baseline is pressed on the guide wheel (13); The third step is to adjust the crimping wheel (3) so that the tension meets the requirements; Step 4: The first heating section is powered on, and a voltage is applied between the A conductive wheel (4) and the B conductive wheel (5) through a wire so that the current reaches a specified value; after the adjustment is completed, the power is turned off; Step 5: The second heating section is powered on, and a voltage is applied between the conductive wheel B (5) and the conductive wheel C (6) through a wire so that the current reaches a specified value; after the adjustment is completed, the power is turned off; Step 6: two heating sections are powered on for heating; Step 7: Start the motor on the wire-releasing component 1 and the motor on the wire-receiving component 14 at the same time, and keep the two motors driving the wire-releasing spool and the wire-receiving spool to run synchronously; In the eighth step, the straightening effect can be fine-tuned by adjusting the following basic parameters, namely, straightening voltage, straightening speed, and straightening tension; This method is also suitable for straightening black tungsten wire and molybdenum wire with a diameter of 0.02-0.2mm.
2. A tungsten-based steel wire baseline straightening system for photovoltaic cell panel silicon wafer cutting, comprising an active pay-off component (1), a baseline tensioning unit, a wind shield (7), a control cabinet (11), a thread counting wheel (12), a wire take-up and discharge component (14) and a base (19), wherein the system is characterized by: It also includes an electric heating unit, which includes a plurality of heating sections, such as a first heating section baseline (17) and a second heating section baseline (16). Each heating section is composed of two conductive wheels and a heating baseline. The conductive wheels are connected to a power source through a wire. The A conductive wheel (4), the first heating section baseline (17) and the B conductive wheel (5) constitute a heating section; The B conductive wheel (5), the second heating section baseline (16) and the C conductive wheel (6) constitute the second heating section; A conductive wheel (4) is connected to a power source via a wire (8); The B conductive wheel (5) is connected to a power source via a b wire (9); The C conductive wheel (6) is connected to a power source via a c conductor (10); The A conductive wheel (4), the B conductive wheel (5) and the C conductive wheel (6) are connected to their respective columns through connecting rods and can be adjusted in height; The wind shield (7) surrounds the heating section, and has gaps on both sides for accommodating the baseline. The wind shield is in the shape of a rectangle on all four sides, has no cover, and is made of a transparent material; The active pay-off component (1) comprises a baseline reel and a motor, and the motor drives the baseline reel to rotate; The baseline tensioning unit comprises a line pressing tension component (2) and a line pressing wheel (3), wherein the line pressing tension component (2) is composed of a pulley fixed on a column and fixedly connected to a base (19) via the column, and the line pressing wheel (3) is connected to the column of the line pressing tension component (2) via a connecting rod and can be adjusted in height to adjust the tightness of the tensioning section (18); The control cabinet (11) comprises a voltage and current display and control unit and a control panel. The voltage and current display and control unit displays the voltage and current of the heating section. The control panel is connected to the control module on the motor and the control module on the thread counting wheel via a data line. The control panel can operate the start and stop of the motor and control the speed of the motor. It can judge whether the displayed straightening voltage and current meet the requirements, so as to adjust the current of the heating section accordingly. The wire taking-up and discharging component (14) comprises a wire taking-up spool and a motor, and the wire taking-up spool is driven by the motor; The guide wheel (13) is arranged on the fixed stand of the thread counting wheel (12), and can guide the base line to be wound evenly and neatly on the thread shaft; The heating section can be increased or decreased as needed; The distance between the column of the thread counting wheel (12) and the column of the conductive wheel can be adjusted to adjust the length of the cooling section (15).
3. The tungsten-based steel wire baseline alignment system for photovoltaic cell panel silicon wafer cutting according to claim 2 is characterized by: The electric motor is a servo motor.