Judgment method for thorough cutting of fretsaw and fretsaw

Abstract

A fretsaw cut-through judgment method and a fretsaw are applied to fretsaw cutting equipment, the change rate of displacement data of a tensioning wheel in the fretsaw is detected, and if the change rate is zero or located in a preset interval, it is judged that the fretsaw meets cut-through conditions. Displacement data of the fretsaw tensioning wheel are detected through the displacement sensor, the displacement change rate is obtained, when it is detected that the displacement change rate is zero or approaches zero, it is judged that the fretsaw meets the cut-through condition, the displacement change rate serves as the judgment standard, and the situation that the tensioning wheel cannot return to the initial position due to friction force and the like is avoided; self-judgment of material cut-through is achieved, the automation degree and accuracy of the machining process are improved, and the possibility of manual intervention and misjudgment is reduced.

Description

Technical Field

[0001] The invention relates to the field of crystal cutting, and in particular to a wire saw cutting-through determination method and a wire saw. Background Art

[0002] During the material processing, the guide wheel plays a key role in guiding the material. However, it is difficult to accurately obtain the relative displacement information of the guide wheel by traditional methods, which is extremely unfavorable for ensuring processing accuracy and quality. Moreover, in the material cutting scenario, it is crucial to determine whether the material is cut through. At present, since the guide wheel is affected by factors such as friction during the cutting process, its position is prone to floating. Even if the material is cut through, it is difficult for the guide wheel to return to its initial position, resulting in the inability to accurately determine whether the material is cut through through conventional displacement detection methods. This greatly affects the automation and accuracy of processing. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a wire saw cutting-through determination method and a wire saw, so as to solve the problem that it is difficult to perform cutting-through determination during the wire saw operation process.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A wire saw cutting through determination method, applied to a wire saw cutting device, comprises the steps of: The change rate of the displacement data of the tension wheel in the wire saw is detected, and if the change rate is zero or is within a preset range, it is determined that the wire saw meets the cutting-through condition.

[0005] In order to solve the above technical problems, another technical solution adopted by the present invention is: A wire saw that executes the wire saw cut-through determination method, the wire saw comprising a mounting panel, at least one tensioning wheel, at least one driving wheel, a cutting wire and a displacement sensor; the tensioning wheel and the driving wheel are respectively movably connected to the mounting panel, the cutting wire is wound around the driving wheel and the tensioning wheel, the tensioning wheel is used to adjust the tension of the cutting wire, and the displacement sensor is arranged on the mounting panel and is used to detect the displacement data of the tensioning wheel.

[0006] The beneficial effects of the present invention are: providing a wire saw cut-through judgment method and a wire saw, detecting the displacement data of the wire saw tensioning wheel through a displacement sensor, and obtaining the displacement change rate, when the displacement change rate is detected to be zero or close to zero, determining that the wire saw meets the cut-through condition, using the displacement change rate as a judgment criterion to avoid the tensioning wheel being unable to return to the initial position due to friction and other reasons, realizing self-judgment of material cut-through, improving the automation and accuracy of the processing process, and reducing the possibility of manual intervention and misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1A schematic diagram of a wire saw according to an embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of a wire saw according to an embodiment of the present invention Figure 2 ; Figure 3 is a schematic diagram of a tensioning wheel in an embodiment of the present invention; Figure 4 Schematic diagram of the internal structure of the tensioning wheel in an embodiment of the present invention; Description of labels: 1. Installation panel; 2. Tensioning wheel; 21. Guide rail; 22. Slider; 23. Tensioning spring; 24. Wheel body; 3. Driving wheel; 4. Driven wheel; 5. Cutting line; 6. Displacement sensor. DETAILED DESCRIPTION

[0008] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0009] A wire saw cutting through determination method, applied to a wire saw cutting device, comprises the steps of: The change rate of the displacement data of the tension wheel in the wire saw is detected, and if the change rate is zero or is within a preset range, it is determined that the wire saw meets the cutting-through condition.

[0010] It is understandable that wire saw cutting equipment refers to mechanical equipment used for high-precision material cutting, which is widely used in semiconductor, photovoltaic, precision manufacturing and other industries, especially for efficient processing of brittle materials. Among them, single crystal silicon cutting equipment, as a key equipment in the photovoltaic and semiconductor industries, is mainly used to cut single crystal silicon rods into silicon wafers, providing basic materials for subsequent battery cell manufacturing or chip processing.

[0011] In the photovoltaic industry, monocrystalline silicon cutting equipment is mainly used to cut silicon ingots into thin slices to improve the utilization rate of silicon materials, reduce processing losses, and ensure uniform thickness of silicon slices to meet the production requirements of high-efficiency photovoltaic cells. In the semiconductor field, the cutting accuracy of silicon slices directly affects the integration of chips and device performance, so the stability, accuracy and automation of cutting equipment are extremely high.

[0012] The main technical challenges faced by wire saw equipment during the cutting of single crystal silicon are: single crystal silicon is hard and fragile, and the cutting force and tension need to be precisely controlled during the cutting process to prevent material damage or cracking. At the same time, due to factors such as tension changes, guide wheel floating, and cutting wire loss during the cutting process, the traditional method of determining the penetration by manual or simple displacement monitoring is susceptible to errors, which may lead to incomplete or excessive cutting, affecting material utilization and equipment operation efficiency.

[0013] From the above description, it can be seen that the beneficial effects of the present invention are: a method for determining whether a wire saw has cut through based on the rate of change of the displacement data of the tensioning wheel is proposed. This method detects the change of the displacement data of the tensioning wheel in real time and sets a reasonable threshold range to achieve accurate judgment of the state of the cut through. Compared with the traditional manual observation or single displacement value comparison method, this method reduces human errors, improves the degree of automation, and makes the cutting process more efficient and stable. Since the force on the tensioning wheel changes as the cutting progresses, this method can more accurately reflect the working state of the wire saw through the detection of the rate of change, avoid misjudgment caused by friction, inertia or differences in material properties, and improve the overall processing accuracy and reliability.

[0014] In some embodiments, detecting the rate of change of displacement data of a tensioning wheel in a wire saw includes: Start the wire saw, detect the displacement data of the tension wheel in the wire saw in the initial state, and record it as the initial displacement value; Controlling the wire saw to perform cutting operations, and detecting the displacement data of the tensioning wheel in real time, and recording it as a real-time displacement value; The initial displacement value and the real-time displacement value are compared to obtain the rate of change of the displacement data of the tensioning wheel.

[0015] That is, by recording the initial displacement value of the wire saw tension wheel and continuously detecting the real-time displacement value during the cutting process, the rate of change is calculated. This method avoids the influence of instantaneous jitter when the equipment is started or the cutting starts on the measurement results, while providing a more stable data source. In this way, the dynamic changes of the tension wheel during the wire saw operation can be accurately captured, making the judgment more accurate, avoiding misjudgment and hysteresis effects, and improving the cutting quality. In addition, this method can also be used to monitor the health status of the equipment in real time, determine whether the tension wheel has abnormal wear or failure risks, and further improve the reliability and service life of the equipment.

[0016] In some embodiments, the method of detecting the rate of change of displacement data of a tensioning wheel in a wire saw further includes: A displacement sensor is used to detect the displacement data of the tensioning wheel, and the change rate of the displacement data is calculated.

[0017] As can be seen from the above description, the present invention further emphasizes the necessity of using a displacement sensor to detect the tensioning wheel and calculating the displacement change rate based on the sensor data. Compared with traditional visual detection or force feedback detection methods, this approach has higher accuracy and anti-interference ability.

[0018] Specifically, the displacement sensor is a linear sensor. The current signal range of the linear displacement sensor is 4-20mA, and it has extremely high repeatability (up to 0.01mm). Through this sensor, the displacement change of the tensioner can be accurately captured. In actual installation, the linear displacement sensor is precisely connected to the tensioner to ensure that the sensor can sense the position of the guide wheel in real time and accurately, and convert it into a corresponding current signal output.

[0019] In some embodiments, the method further comprises the steps of: If the rate of change is zero or is within a preset range and remains stable within a preset time period, it is determined that the wire saw has cut through the object.

[0020] As can be seen from the above description, the present invention further improves the accuracy of the cut-through judgment by adding a time dimension to the stability judgment, that is, requiring the displacement change rate to remain stable within a preset period of time. This method can effectively suppress erroneous judgments caused by instantaneous vibrations, short-term interference or mechanical elastic recovery. For example, when the material has just been cut through, there may still be a slight change in the displacement of the tensioning wheel. This method sets a buffer time to ensure that the displacement change rate is stabilized before making a judgment, thereby avoiding false triggering of the cut-through signal. This not only improves the reliability of the judgment, but also reduces the sensitivity of the system to environmental factors, making it more adaptable to complex production environments. Preferably, the preset time length is in the range of 10-30s, preferably 15s. Within the above time length range, after testing, it can effectively avoid the interference of dynamic friction, thereby ensuring that the wire saw has met the cut-through conditions.

[0021] Please refer to Figure 1 and Figure 2 A wire saw performs a wire saw cutting through determination method, the wire saw comprises a mounting panel 1, at least one tensioning wheel 2, at least one driving wheel 3, a cutting wire 5 and a displacement sensor 6; the tensioning wheel 2 and the driving wheel 3 are respectively movably connected to the mounting panel 1, the cutting wire 5 is wound around the driving wheel 3 and the tensioning wheel 2, the tensioning wheel 2 is used to adjust the tension of the cutting wire 5, and the displacement sensor 6 is arranged on the mounting panel 1 and is used to detect the displacement data of the tensioning wheel 2.

[0022] There are many tensioning methods for the tensioning wheel 2, such as servo motor swing arm tensioning, cylinder, oil cylinder pulling tensioning, heavy hammer tensioning or spring tensioning.

[0023] From the above description, it can be seen that a wire saw with an automatic cutting-through judgment function is provided, the core of which is to combine the motion characteristics of the displacement sensor 6 and the tensioning wheel 2, and realize automatic cutting control by real-time monitoring of the change rate of the displacement data. Compared with traditional wire saws that rely on manual observation or timing control, this device can independently judge the cutting-through state and adjust the operating parameters in real time, thereby improving processing efficiency and reducing human misjudgment and intervention. This wire saw is suitable for industries such as high-precision manufacturing, semiconductor processing, and glass cutting, and has significant advantages in scenarios that require stable and controllable cutting quality. In addition, the system can be integrated with an intelligent control system to realize data recording, remote monitoring, and automatic adjustment, thereby improving the level of intelligence in industrial production.

[0024] In some embodiments, the wire saw further comprises at least one driven wheel 4, which is rotatably connected to the mounting panel 1 and is located on the same end face as the driving wheel 3 and the tensioning wheel 2; a cutting line 5 located between the driven wheel 4 and the tensioning wheel 2 is used for cutting objects.

[0025] As can be seen from the above description, the present invention further optimizes the structural design of the wire saw, introduces the driven wheel 4 to improve the movement trajectory of the cutting wire 5, and improves the stability and efficiency of cutting. The role of the driven wheel 4 is to provide additional support, so that the tension distribution of the cutting wire 5 is more uniform, and the cutting error caused by tension fluctuations during the cutting process is reduced. In addition, the addition of the driven wheel 4 can optimize the life of the cutting wire 5, reduce wear, and improve the overall reliability of the equipment. This structure is suitable for industrial production scenarios with long-term continuous work, which helps to improve the stability of cutting quality, especially in high-precision cutting applications.

[0026] Please refer to Figure 1 Specifically, the number of the driving wheel 3, the driven wheel 4 and the tensioning wheel 2 is one each, and the driving wheel 3, the driven wheel 4 and the tensioning wheel 2 are arranged in a triangle.

[0027] As can be seen from the above description, the present invention improves the tension control capability of the cutting line 5 and enhances the overall stability by adopting a three-wheel triangle arrangement structure. In this arrangement, the cutting line 5 can maintain a relatively uniform tension distribution during operation, reducing the cutting error caused by uneven force on one side.

[0028] Please refer to Figure 2In addition, in another embodiment, the number of the driving wheel 3 and the driven wheel 4 is one, the number of the tensioning wheels 2 is two, and the four guide wheels are arranged in a quadrilateral. In order to solve the problem that it is difficult to judge whether the material is cut through due to the floating position of the guide wheels, the preset tensioning forces of the two tensioning wheels 2 are set differently. For example, the tensioning force of one tensioning wheel 2 is set to 8.5 kgf, and the tensioning force of the other tensioning wheel 2 is set to 8 kgf. The displacement sensor 6 is used to obtain the displacement information of the initial positions of the two tensioning wheels 2 respectively. In the process of cutting through judgment, according to the above method, the change rate of the displacement information is calculated to determine whether the cutting through condition is met.

[0029] Please refer to Figure 3 and Figure 4 In some embodiments, the tensioning wheel 2 includes a guide rail 21, a slider 22, a tensioning spring 23 and a wheel body 24; The guide rail 21 is connected to the installation panel 1, and the slider 22 is slidably connected to the guide rail 21; One end of the tension spring 23 is fixed to the mounting panel 1 , and the other end is fixedly connected to the slider 22 . The wheel body 24 is fixedly connected to the slider 22 . The displacement sensor 6 is used to detect the displacement data of the wheel body 24 .

[0030] As can be seen from the above description, the present invention optimizes the structural design of the tension wheel 2 so that it has the ability to adjust the tension. Through the combination of the guide rail 21, the slider 22 and the tension spring 23, the tension wheel 2 can be automatically adjusted according to the actual force of the cutting line 5, thereby ensuring that the cutting line 5 is always within the ideal tension range during the cutting process.

[0031] In some embodiments, the wire saw also includes a control system, which is used to receive displacement data obtained by monitoring the displacement sensor 6 and calculate the rate of change of the displacement data to determine whether the wire saw meets the cutting-through condition, and trigger a matching control instruction when the cutting-through condition is met.

[0032] As can be seen from the above description, the present invention adds a control system to realize an intelligent cut-through judgment function. The control system automatically judges the cut-through state by receiving the data of the displacement sensor 6 in real time and calculating the change rate, and triggers matching control instructions, such as pausing cutting, adjusting the feed speed, etc. The system reduces manual intervention, makes the cutting process more intelligent, and improves production efficiency and product consistency. Specifically, the wire saw also includes a data storage module for recording the displacement data of the tensioning wheel 2 and its change rate.

[0033] In summary, the present invention provides a wire saw cutting through judgment method and device based on the change rate of the tension wheel displacement data, which realizes accurate and efficient automatic cutting through judgment by real-time detection of the displacement data of the tension wheel and setting a reasonable change rate threshold. Compared with the traditional method of relying on manual observation or single displacement value comparison, the present invention reduces human errors and improves the level of cutting automation, stability and accuracy. A high-precision linear displacement sensor (4-20mA, repeatability 0.01mm) is used to ensure accurate capture of the displacement change of the tension wheel, and to avoid instantaneous interference through time stability judgment (such as 10-30s) to improve reliability. In addition, the tension wheel structure is optimized, and automatic tension adjustment is realized through the combination of guide rails, sliders and tension springs to ensure stable force on the cutting line. The driven wheel and triangular arrangement structure further optimize the tension distribution, improve cutting consistency and reduce wear. At the same time, differentiated tensioning forces (such as 8.5kgf and 8kgf) are used to improve the robustness of judgment. The introduction of an intelligent control system can calculate the change rate in real time and trigger control instructions (such as pausing cutting and adjusting feed speed), reduce manual intervention and improve production efficiency.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wire saw cutting penetration determination method, applied to a wire saw cutting device, characterized in that: Includes steps: The change rate of the displacement data of the tension wheel in the wire saw is detected, and if the change rate is zero or is within a preset range, it is determined that the wire saw meets the cutting-through condition.

2. A wire saw cutting through determination method according to claim 1, characterized in that: The method of detecting the rate of change of displacement data of the tensioning wheel in the wire saw comprises: Start the wire saw, detect the displacement data of the tension wheel in the wire saw in the initial state, and record it as the initial displacement value; Controlling the wire saw to perform cutting operations, and detecting the displacement data of the tension wheel in real time, and recording it as a real-time displacement value; The initial displacement value and the real-time displacement value are compared to obtain the rate of change of the displacement data of the tensioning wheel.

3. A wire saw cutting through determination method according to claim 2, characterized in that: The method of detecting the change rate of the displacement data of the tensioning wheel in the wire saw further includes: A displacement sensor is used to detect the displacement data of the tensioning wheel, and the change rate of the displacement data is calculated.

4. A wire saw cutting through determination method according to claim 1, characterized in that: The method further comprises the steps of: If the rate of change is zero or is within a preset range and remains stable within a preset time period, it is determined that the wire saw has cut through the object.

5. A wire saw, characterized in that: A method for determining whether a wire saw has cut through is implemented according to any one of claims 1 to 4, wherein the wire saw comprises a mounting panel, at least one tensioning wheel, at least one driving wheel, a cutting wire and a displacement sensor; the tensioning wheel and the driving wheel are respectively movably connected to the mounting panel, the cutting wire is wound around the driving wheel and the tensioning wheel, the tensioning wheel is used to adjust the tension of the cutting wire, and the displacement sensor is arranged on the mounting panel and is used to detect the displacement data of the tensioning wheel.

6. A wire saw according to claim 5, characterized in that: The wire saw also includes at least one driven wheel, which is rotatably connected to the mounting panel and is located on the same end surface as the driving wheel and the tensioning wheel; the cutting line between the driven wheel and the tensioning wheel is used for cutting objects.

7. A wire saw according to claim 6, characterized in that: The number of the driving wheel, the driven wheel and the tensioning wheel is one each, and the driving wheel, the driven wheel and the tensioning wheel are arranged in a triangle.

8. The wire saw according to claim 6, characterized in that: The number of the driving wheel and the number of the driven wheel are one, the number of the tensioning wheels is two, and the driving wheel, the driven wheel and the tensioning wheel are arranged in a quadrilateral.

9. The wire saw according to claim 5, characterized in that: The tensioning wheel comprises a guide rail, a slider, a tensioning spring and a wheel body; The guide rail is connected to the mounting panel, the slider is slidably connected to the guide rail, and the slider is connected to the wheel body; One end of the tension spring is fixed to the mounting panel, and the other end is fixedly connected to the slider, and the wheel body is fixedly connected to the slider; the displacement sensor is used to detect the displacement data of the wheel body.

10. The wire saw according to claim 5, characterized in that: The wire saw also includes a control system, which is used to receive displacement data obtained by monitoring the displacement sensor and calculate the change rate of the displacement data to determine whether the wire saw meets the cutting-through condition, and trigger a matching control instruction when the cutting-through condition is met.

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