Multi-wire cutting machine capable of reducing twisting force of steel wire and control method
By monitoring and adjusting the torsion of the steel wire in real time in a multi-wire cutting machine, combined with tension adjustment, the problems of fatigue damage and unstable cutting caused by the accumulation of torsional force in the steel wire were solved, thus extending the life of the steel wire and improving the quality of silicon wafers.
Patent Information
- Application Number
- CN202511625084.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2025-12-30
AI Technical Summary
During multi-wire cutting, the steel wire suffers fatigue damage due to the accumulation of torsional force, which affects its service life and the quality of silicon wafer cutting, resulting in vibration and unstable wire routing.
By setting up deflection and monitoring components in the multi-wire cutting machine, the torsion of the steel wire is monitored in real time, and the contact angle between the steel wire and the guide end is adjusted by the deflection guide wheel to reduce the accumulation of torsional force. The tension of the steel wire is adjusted by the tension adjustment component to form a stable steel wire mesh to improve the cutting quality.
It effectively reduces the accumulation of torsional force in steel wires, extends service life, improves the stability of the cutting process, reduces surface defects on silicon wafers, and enhances cutting quality and batch consistency.
Smart Images
Figure CN121223971A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of silicon wafer cutting, and particularly relates to a multi-wire cutting machine and control method for reducing torsional force of a steel wire. BACKGROUND
[0002] As a basic material in the fields of semiconductors and photovoltaics, the cutting quality of a silicon wafer directly affects the performance and manufacturing cost of a device. At present, the cutting of a silicon wafer mainly adopts a multi-wire cutting technology, which drives a long steel wire to perform high-speed reciprocating motion through a multi-wire cutting machine. In this process, the steel wire forms a dense wire net through a guide roller system and carries silicon carbide slurry to continuously grind and cut a silicon ingot.
[0003] However, the steel wire not only needs to bear extremely high tension and grinding resistance during the entire cutting process, but also bears complex alternating stress for a long time. At the same time, when the steel wire is routed through the guide roller, due to the existence of the wire exit angle and the wire entry angle, the steel wire does not always travel along the same circumferential surface of the guide roller groove, but produces transverse slip in the guide roller groove, and then continuously generates slight self-rotation, resulting in the gradual accumulation of torsional stress (torsional force) in the steel wire. With the continuous progress of the cutting, this torsional effect is continuously superimposed, which is easy to cause fatigue damage of the steel wire, and then reduces the service life thereof. At the same time, the torsion of the steel wire also causes vibration and unstable wire running during the cutting process, and finally causes defects such as wire marks, warping or hidden cracks on the surface of the silicon wafer, which seriously affects the finished product quality and batch consistency of the silicon wafer. SUMMARY
[0004] Therefore, it is necessary to provide a multi-wire cutting machine and control method for reducing torsional force of a steel wire, which can reduce the accumulation of torsional force of the steel wire during the cutting process, thereby reducing the fatigue damage of the steel wire to prolong the service life thereof, and effectively improving the vibration and unstable wire running during the cutting process, improving the cutting quality of the silicon wafer, reducing defects such as wire marks, warping or hidden cracks, and ensuring the finished product quality and batch consistency of the silicon wafer.
[0005] In a first aspect, the present application provides a multi-wire cutting machine for reducing the torsion force of steel wires, comprising a frame member, a wire feeding and winding member, a cutting member and an adjusting member, the wire feeding and winding member is installed on the side of the frame member, the wire feeding and winding member comprises a wire feeding assembly and a wire winding assembly, the wire feeding assembly is used to deliver the steel wires to the cutting member, and the wire winding assembly is used to recover the steel wires from the cutting member; the cutting member is installed on one end of the frame member, and is used to form a dense steel wire net to cut a silicon ingot into silicon wafers through the steel wire net; the adjusting member comprises two deflection assemblies with the same structure and a monitoring assembly, the fixed ends of the two deflection assemblies are installed on the frame member and are respectively located at the wire inlet end and the wire outlet end of the cutting member, and the steel wires are wound around the guide ends of the two deflection assemblies; the monitoring assembly is electrically connected with the two deflection assemblies to monitor the state of the steel wires in real time and control the deflection of the guide end of the corresponding deflection assembly when the steel wires are twisted, so as to change the contact angle between the steel wires and the guide end of the deflection assembly.
[0006] Preferably, each deflection assembly comprises a deflection bracket, a deflection piece, a deflection guide wheel, a deflection gear and a deflection motor, the bottom of the deflection bracket is fixedly installed on the frame member, the deflection piece is semicircular and is rotatably installed on the top of the deflection bracket, the deflection guide wheel is installed in the central plane of the deflection piece to contact and guide the steel wires, the arc-shaped outer edge of the deflection piece is provided with a tooth pattern to form an arc-shaped gear rack, the deflection gear is rotatably installed in the middle of the deflection bracket and is engaged with the arc-shaped gear rack to drive the deflection piece to rotate around the side mounting point, and the fixed end of the deflection motor is installed on the deflection bracket and the driving end is drivingly connected with the deflection gear to drive the deflection gear to rotate, thereby driving the deflection piece and the deflection guide wheel to deflect together to change the contact angle between the steel wires and the deflection guide wheel.
[0007] Preferably, the monitoring assembly comprises two monitoring cameras and an integrated control unit, the two monitoring cameras are respectively arranged near the two deflection assemblies and are focused on the steel wire segment passing through the corresponding deflection guide wheel, and the integrated control unit is electrically connected with the two monitoring cameras and the deflection motors of the two deflection assemblies to control the corresponding deflection motor to rotate according to the steel wire image information collected by the monitoring camera in real time, so as to change the contact angle between the corresponding deflection guide wheel and the steel wires.
[0008] Preferably, the wire winding and unwinding mechanism further comprises at least two tension adjusting assemblies, each of which comprises a tension adjusting shaft, a coupling shaft, a tension adjusting guide wheel and a tension adjusting motor, the first end of the tension adjusting shaft is rotatably mounted on the frame member, the first end of the coupling shaft is mounted on the second end of the tension adjusting shaft, the tension adjusting guide wheel is mounted on the second end of the coupling shaft, and the steel wire is wound around the tension adjusting guide wheel; the fixed end of the tension adjusting motor is mounted on the frame member, and the driving end is drivingly connected with the first end of the tension adjusting shaft for driving the tension adjusting shaft to rotate, thereby driving the coupling shaft and the tension adjusting guide wheel to swing, so as to change the winding path of the steel wire and adjust the tension of the steel wire.
[0009] Preferably, the wire unwinding assembly comprises a wire unwinding drum, at least four wire unwinding guide wheels and a wire unwinding motor, the wire unwinding drum is rotatably mounted on the frame member for carrying and releasing the steel wire; the fixed end of the wire unwinding motor is mounted on the frame member, and the driving end is drivingly connected with the wire unwinding drum to control the rotation speed of the wire unwinding drum; each wire unwinding guide wheel is mounted in sequence along the path of the steel wire from the wire unwinding drum to the cutting member to guide and change the direction of the steel wire; wherein the steel wire at least winds around the tension adjusting guide wheel of one of the tension adjusting assemblies in the process of being guided by each wire unwinding guide wheel, so as to adjust the tension of the steel wire on the unwinding side.
[0010] Preferably, the wire winding assembly comprises a wire winding drum, at least four wire winding guide wheels and a wire winding motor, the wire winding drum is rotatably mounted on the frame member for winding and recycling the cut steel wire; the fixed end of the wire winding motor is mounted on the frame member, and the driving end is drivingly connected with the wire winding drum to control the rotation speed of the wire winding drum; each wire winding guide wheel is mounted in sequence along the path of the steel wire from the cutting member to the wire winding drum to guide and change the direction of the steel wire; wherein the steel wire at least winds around the tension adjusting guide wheel of one of the tension adjusting assemblies in the process of being guided by each wire winding guide wheel, so as to adjust the tension of the steel wire on the winding side.
[0011] Preferably, the cutting member comprises a wire mesh assembly and a feeding assembly, the wire mesh assembly comprises a wire mesh frame and two wire mesh rollers, the wire mesh frame is mounted on the frame member, and the two wire mesh rollers are rotatably mounted at the two ends of the wire mesh frame, at least two annular grooves for arranging the steel wire are formed on each of the two wire mesh rollers to make the steel wire repeatedly wind between the two wire mesh rollers to form a dense steel wire mesh; the feeding assembly is mounted on the frame member and located above the wire mesh assembly for clamping and lifting the silicon ingot to send it to the steel wire mesh for cutting.
[0012] Preferably, the feeding assembly comprises a lifting motor and a clamp, the fixed end of the lifting motor is installed on the top of the frame member, the lifting end extends into the frame member, the fixed end of the clamp is installed on the lifting end of the lifting motor, and the clamping end is used for mounting the silicon ingot to send the silicon ingot to the steel wire mesh cutting by the descending of the lifting end of the lifting motor.
[0013] In a second aspect, the present application provides a control method of the multi-wire cutting machine for reducing the torsion force of the steel wire based on the first aspect, comprising the following steps:
[0014] S1, real-time image acquisition of the corresponding steel wire segment is performed by monitoring the camera, and the image is uploaded to the integrated control unit;
[0015] S2, the integrated control unit calculates the deviation value of the current torsion angle and the predetermined torsion angle according to the uploaded steel wire image;
[0016] S3, if the deviation value exceeds the preset threshold value, step S4 is entered, otherwise, step S2 is returned;
[0017] S4, the integrated control unit sends a control signal to the corresponding deflection motor according to the deviation value to drive the deflection member to deflect the deflection guide roller by a corresponding angle until the deviation value is less than the preset threshold value, and step S2 is returned.
[0018] The above-mentioned multi-wire cutting machine for reducing the torsion force of the steel wire is provided with a frame member, a wire feeding and winding member, a cutting member and an adjusting member. The wire feeding and winding member is installed on the side surface of the frame member, and comprises a wire feeding assembly and a wire winding assembly. The wire feeding assembly is used for delivering the steel wire to the cutting member, and the wire winding assembly is used for recovering the steel wire from the cutting member. The cutting member is installed at one end of the frame member and is used for forming a dense steel wire mesh to cut the silicon ingot into silicon wafers by the steel wire mesh. The adjusting member comprises two deflection assemblies with the same structure and a monitoring assembly. The fixed ends of the two deflection assemblies are installed on the frame member and are respectively located at the wire inlet end and the wire outlet end of the cutting member. The steel wire is wound around the guide ends of the two deflection assemblies. The monitoring assembly is electrically connected with the two deflection assemblies. In this way, the state of the steel wire is monitored in real time by the monitoring assembly. When the monitoring assembly detects that the steel wire is twisted, the required correction angle is calculated according to the torsion angle, and the guide end of the corresponding deflection assembly is driven to deflect. This deflection action actively changes the angle of the steel wire entering and leaving the guide end of the deflection assembly, so that the steel wire running at high speed receives a transverse friction force as a correction force in the area where it contacts the deflection assembly. The steel wire generates autorotation in the opposite direction of the current torsion direction under the action of the correction force, thereby reducing the accumulation of torsion force of the steel wire, further reducing the fatigue damage of the steel wire, prolonging the service life of the steel wire, improving the vibration and unstable wire movement phenomenon in the cutting process, improving the cutting quality of the silicon wafer, and reducing defects such as wire marks, warping or hidden cracks. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a perspective view of the multi-wire cutting machine of the present application which reduces the torsion force of the steel wire.
[0020] Figure 2 is a perspective view of the deflection assembly of the present application.
[0021] Figure 3 is a sectional view of the deflection assembly of the present application.
[0022] Figure 4 is a side view of the multi-wire cutting machine of the present application which reduces the torsion force of the steel wire.
[0023] Figure 5 is a front view of the multi-wire cutting machine of the present application which reduces the torsion force of the steel wire.
[0024] Figure 6 is a flow chart of the control method of the present application.
[0025] In the figure: multi-wire cutting machine 10, rack member 20, take-up and pay-off member 30, pay-off assembly 31, pay-off drum 311, pay-off guide wheel 312, take-up assembly 32, take-up drum 321, take-up guide wheel 322, tension adjustment assembly 33, tension adjustment shaft 331, coupling 332, tension adjustment guide wheel 333, cutting member 40, wire net assembly 41, wire net rack 411, wire net roller 412, feeding assembly 42, lifting motor 421, clamp 422, adjustment member 50, deflection assembly 51, deflection support 511, deflection member 512, deflection guide wheel 513, deflection gear 514, deflection motor 515. DETAILED DESCRIPTION
[0026] The technical solutions and technical effects of the embodiments of the present application are further described in detail below in combination with the drawings of the present application.
[0027] Please refer to Figures 1 to 3The first aspect of the present application provides a multi-wire cutting machine 10 for reducing the torsion force of steel wire, comprising a frame member 20, a wire feeding and winding member 30, a cutting member 40 and an adjusting member 50, the wire feeding and winding member 30 is installed on the side of the frame member 20, the wire feeding and winding member 30 comprises a wire feeding assembly 31 and a wire winding assembly 32, the wire feeding assembly 31 is used to deliver the steel wire to the cutting member 40, and the wire winding assembly 32 is used to recover the steel wire from the cutting member 40; the cutting member 40 is installed at one end of the frame member 20, and is used to form a dense steel wire mesh with the steel wire, so as to cut the silicon ingot into silicon wafers through the steel wire mesh; the adjusting member 50 comprises two deflecting assemblies 51 which are structurally identical and a monitoring assembly, the fixed ends of the two deflecting assemblies 51 are installed on the frame member 20, and are respectively located at the wire inlet end and the wire outlet end of the cutting member 40, and the steel wire is wound around the guide ends of the two deflecting assemblies 51; the monitoring assembly is electrically connected with the two deflecting assemblies 51, so as to monitor the state of the steel wire in real time, and control the guide end of the corresponding deflecting assembly 51 to deflect when the steel wire is twisted, so as to change the contact angle of the steel wire with the guide end of the deflecting assembly 51, thereby reducing the accumulation of torsion force of the steel wire; in this way, the state of the steel wire is monitored in real time by the monitoring assembly, when the monitoring assembly detects that the steel wire is twisted, the required correction angle is calculated according to the torsion angle, and the guide end of the corresponding deflecting assembly 51 is driven to deflect, the deflection action actively changes the angle of the steel wire entering and leaving the guide end of the deflecting assembly 51, so that the steel wire running at high speed receives a transverse friction force as a correction force in the area where the steel wire contacts the deflecting assembly 51, and the steel wire generates self-rotation in the opposite direction of the current torsion direction under the action of the correction force, thereby reducing the accumulation of torsion force of the steel wire, further reducing the fatigue damage of the steel wire, prolonging the service life of the steel wire, improving the vibration and unstable wire movement phenomenon in the cutting process, improving the cutting quality of the silicon wafer, and reducing defects such as wire marks, warping or hidden cracks.
[0028] Please refer to Figure 2 and Figure 3Further, each deflection assembly 51 comprises a deflection bracket 511, a deflection piece 512, a deflection guide wheel 513, a deflection gear 514 and a deflection motor 515. The bottom of the deflection bracket 511 is fixedly installed on the rack member 20. The deflection piece 512 is semicircular, and its side surface is rotatably installed on the top of the deflection bracket 511. The deflection guide wheel 513 is installed in the central plane of the deflection piece 512 to contact and guide the steel wire. The arc-shaped outer edge of the deflection piece 512 is provided with a tooth pattern to form an arc-shaped gear rack. The deflection gear 514 is rotatably installed in the middle of the deflection bracket 511 and is engaged with the arc-shaped gear rack to drive the deflection piece 512 to rotate about its side surface installation point. The fixed end of the deflection motor 515 is installed on the deflection bracket 511, and the driving end is drivingly connected with the deflection gear 514 to drive the deflection gear 514 to rotate, thereby driving the deflection piece 512 and the deflection guide wheel 513 to deflect together to change the contact angle of the steel wire with the deflection guide wheel 513. Specifically, when the correction action is performed, the deflection motor 515 drives the deflection gear 514 to rotate, and drives the deflection piece 512 and the deflection guide wheel 513 to deflect by a corresponding angle to change the contact angle of the steel wire with the deflection guide wheel 513. This deflection actively changes the contact angle and spatial wrap angle of the steel wire with the deflection guide wheel 513. When the high-speed running steel wire contacts the deflection guide wheel 513 with a deflection, a significant transverse friction force component will be generated at the contact point, which constitutes an active “correction force” applied to the steel wire. This correction force acts on the surface of the steel wire to generate a correction torque relative to the central axis of the steel wire, which promotes the steel wire to produce a controlled autorotation in the opposite direction of the current torsion, for example, if the steel wire is in a clockwise over-torsion state, the system drives the deflection guide wheel 513 to deflect to apply a torque that tends to produce counterclockwise autorotation. In this way, the accumulated torsional stress of the steel wire during running is effectively neutralized and offset, thereby significantly reducing the accumulation of torsional force of the steel wire, reducing the fatigue damage of the steel wire, maintaining the stability of the cutting process, reducing vibration and unstable wire movement, and significantly improving the cutting quality of the silicon wafer.
[0029] In the present embodiment, mounting holes are formed in the deflection piece 512, and fixing holes are formed in the deflection bracket 511. The rotation connection of the deflection piece 512 is achieved by passing a pin shaft through the mounting holes and the fixing holes.
[0030] Further, the monitoring assembly comprises two monitoring cameras and an integrated control unit. The two monitoring cameras are respectively arranged near the two deflection assemblies 51 and focus on the steel wire segment passing through the corresponding deflection guide wheel 513. The integrated control unit is electrically connected with the two monitoring cameras and the deflection motors 515 of the two deflection assemblies 51 to control the corresponding deflection motor 515 to rotate according to the steel wire image information collected by the monitoring camera in real time, so as to change the contact angle of the corresponding deflection guide wheel 513 with the steel wire.
[0031] In this embodiment, a high frame rate CCD camera is used for monitoring; specifically, the monitoring camera and integrated control unit acquire the current torsion angle of the steel wire through the following steps:
[0032] 1. Image acquisition and transmission: High frame rate CCD cameras are respectively set near the deflection components at the inlet and outlet ends of the cutting component, and accurately focus on the steel wire section that passes through the corresponding deflection guide wheel. The monitoring camera runs continuously at a high frame rate to capture the extremely fine longitudinal texture formed on the surface of the steel wire due to the manufacturing process or the laser micro-marks added in advance, and uploads each frame of steel wire image acquired to the integrated control unit in real time.
[0033] 2. Image processing and feature recognition: After receiving the steel wire image, the integrated control unit performs preprocessing such as contrast enhancement and noise filtering to enhance the distinction between the steel wire surface features and the background, ensuring the accuracy of subsequent recognition. Subsequently, it calls the recognition algorithm built into the integrated control unit to accurately locate and extract the key features of the steel wire surface in the steel wire image, namely the inherent microscopic longitudinal texture or the preset laser micro-marking.
[0034] 3. Twist Angle Calculation: Based on the identified surface features of the steel wire, the integrated control unit calculates its current angle relative to a pre-set reference direction. Specifically, the integrated control unit calculates the orientation angle of these features in the image coordinate system. If it is a vertical texture, it analyzes the tilt angle of its overall direction; if it is a specific marker, it calculates the rotation angle of the line connecting its geometric centers. The calculated angle value is defined as the real-time twist angle of the steel wire at that monitoring point. The integrated control unit performs this calculation on the images transmitted by the monitoring cameras at the input and output ends of the wire, thereby obtaining independent twist angle data at two key locations.
[0035] 4. Deviation Analysis and Result Output: The integrated control unit compares the calculated real-time torsion angle with the "predetermined torsion angle" stored in it beforehand, and calculates the specific deviation value between the two. This deviation value includes not only the magnitude of the torsion angle, but also the direction of the torsion (clockwise or counterclockwise). Finally, the integrated control unit determines whether to initiate a correction action and how to perform the correction action based on the torsion angle deviation value.
[0036] In this embodiment, the predetermined torsion angle is the torsion angle under ideal conditions that is preset based on the steel wire material, cutting process parameters and historical data, and is usually set to 0°.
[0037] In one embodiment, the integrated control unit has a built-in preset database that stores adjustment parameters for the deflection guide wheel 513 corresponding to different torsional deviation values, including deflection angle and direction. When the deviation value exceeds a preset threshold, the integrated control unit queries the database to obtain the adjustment parameters that match the current deviation value and sends a control signal to the corresponding deflection motor 515 to drive the deflection guide wheel 513 to rotate according to the parameters. Furthermore, after each adjustment, the monitoring camera continuously acquires images of the steel wire, and the integrated control unit evaluates the degree of reduction in the torsion of the steel wire. If the measured torsion angle deviation value after adjustment is stable within a smaller range, the integrated control unit can use the currently effective adjustment parameters as optimization values and update the corresponding entries in the database.
[0038] In one implementation, the integrated control unit calculates the adjustment angle α of the deflection guide wheel 513 based on the torsional deviation value e using the following formula:
[0039]
[0040] Where k is a proportionality coefficient, determined through experimental fitting, typically ranging from 0.5 to 2.0, depending on the steel wire material and cutting conditions. The direction is determined by the direction of torsion: if the steel wire twists clockwise, the deflector wheel will twist counterclockwise; and vice versa.
[0041] Please refer to Figure 4 Furthermore, the take-up and unwinding component 30 also includes at least two tension adjustment components 33. Each tension adjustment component 33 includes a tension adjustment shaft 331, a coupling 332, a tension adjustment guide wheel 333, and a tension adjustment motor. The first end of the tension adjustment shaft 331 is rotatably mounted on the frame component 20. The first end of the coupling 332 is mounted on the second end of the tension adjustment shaft 331. The tension adjustment guide wheel 333 is mounted on the second end of the coupling 332, and the steel wire is wound around the tension adjustment guide wheel 333. The fixed end of the tension adjustment motor is mounted on the frame component 20, and the driving end is drivenly connected to the first end of the tension adjustment shaft 331 to drive the tension adjustment shaft 331 to rotate, thereby causing the coupling 332 and the tension adjustment guide wheel 333 to swing, thereby changing the winding path of the steel wire and adjusting the tension of the steel wire. Specifically, by adjusting the tension of the steel wire in real time, steel wire breakage or loosening caused by tension fluctuations is avoided, cutting stability is improved, wire marks and microcracks on the silicon wafer surface are reduced, and the service life of the steel wire is extended.
[0042] In this embodiment, the first end of the tension adjusting shaft 331 is rotatably connected through a bearing housing and a rolling bearing, ensuring smooth rotation of the tension adjusting shaft 331 and reducing friction and wear.
[0043] In this embodiment, the tension adjusting guide wheel 333 is equipped with several pressure sensors to detect the pressure value of the steel wire on the tension adjusting guide wheel 333 in real time and upload it to the integrated control unit. The integrated control unit calculates the real-time tension of the steel wire based on the pressure value and controls the corresponding tension adjusting motor to rotate according to the real-time tension of the steel wire, so as to drive the corresponding tension adjusting guide wheel 333 to swing, change the winding path of the steel wire, and thus adjust the tension of the steel wire.
[0044] Please refer to Figure 4 Furthermore, the wire feeding assembly 31 includes a wire feeding drum 311, at least four wire feeding guide rollers 312, and a wire feeding motor. The wire feeding drum 311 is rotatably mounted on the frame component 20 for carrying and releasing the steel wire. The fixed end of the wire feeding motor is mounted on the frame component 20, and the driving end is drivenly connected to the wire feeding drum 311 to control the rotation speed of the wire feeding drum 311. Each wire feeding guide roller 312 is installed sequentially along the travel path of the steel wire from the wire feeding drum 311 to the cutting component 40 to guide and change the direction of the steel wire. During the process of the steel wire being guided by each wire feeding guide roller 312, it passes through at least one tension adjusting guide roller 333 of the tension adjusting assembly 33 to adjust the tension of the steel wire on the wire feeding side. Specifically, the wire feeding motor drives the wire feeding drum 311 to rotate and release the steel wire. Guided by multiple wire-feeding guide rollers 312, the steel wire changes direction and finally enters the cutting component 40. During its journey, the steel wire passes around the tension-adjusting guide rollers 333. The tension-adjusting component 33 adjusts the position of the guide rollers according to the real-time monitored tension value, thereby adjusting the tension of the steel wire on the wire-feeding side. The speed of the wire-feeding motor is controlled by an integrated control unit to match the wire-reeling speed and cutting requirements.
[0045] Please refer to Figure 4 Furthermore, the take-up assembly 32 includes a take-up drum 321, at least four take-up guide rollers 322, and a take-up motor. The take-up drum 321 is rotatably mounted on the frame component 20 for winding and retrieving the cut steel wire. The fixed end of the take-up motor is mounted on the frame component 20, and the driving end is drivenly connected to the take-up drum 321 to control the rotation speed of the take-up drum 321. Each take-up guide roller 322 is installed sequentially along the travel path of the steel wire from the cutting component 40 to the take-up drum 321 to guide and change the direction of the steel wire. During the process of being guided by each take-up guide roller 322, the steel wire passes through at least one tension adjusting guide roller 333 of the tension adjusting assembly 33 to adjust the tension of the steel wire on the take-up side. Specifically, the take-up motor drives the take-up drum 321 to rotate and retrieve the used steel wire. The steel wire is drawn out from the cutting component 40, guided by multiple take-up guide rollers 322, changes direction, and is finally wound onto the take-up drum 321. During the journey, the steel wire passes around the tension adjusting guide wheel 333. The tension adjusting component 33 adjusts the position of the guide wheel according to the real-time monitored tension value, thereby adjusting the tension of the steel wire on the take-up side. The speed of the take-up motor is controlled by the integrated control unit to maintain synchronization with the release speed.
[0046] In this embodiment, the pay-off drum 311 and the take-up drum 321 are rotatably connected by a rotating shaft.
[0047] Please refer to Figure 4 and Figure 5 Furthermore, the cutting component 40 includes a wire mesh assembly 41 and a feeding assembly 42. The wire mesh assembly 41 includes a wire mesh frame 411 and two wire mesh rollers 412. The wire mesh frame 411 is mounted on the machine frame component 20. The two wire mesh rollers 412 are rotatably mounted at both ends of the wire mesh frame 411. Each of the two wire mesh rollers 412 has at least two annular grooves for arranging steel wires, so that the steel wires are repeatedly wound between the two wire mesh rollers 412 to form a dense wire mesh. The feeding assembly 42 is mounted on the machine frame component 20 and is located above the wire mesh assembly 41, for clamping... The silicon ingot is held and lifted to be fed to the wire mesh cutting. Specifically, the steel wire enters the wire mesh assembly 41 from the inlet end and is repeatedly wound through the annular grooves on the two wire mesh rollers 412 to form a dense wire mesh. The steel wire is kept moving under the drive of the wire feeding motor and the wire taking motor to grind and cut the silicon ingot. The wire mesh assembly 41 forms a uniform and dense wire mesh, which ensures the accuracy and consistency of the silicon ingot being cut into thin slices. The reciprocating motion of the steel wire and the structural design of the wire mesh reduce local stress concentration, reduce the influence of torsional force, and improve cutting efficiency and quality.
[0048] In this embodiment, the wire mesh roller 412 is rotatably connected by a shaft and bearings, so that the wire mesh roller 412 can rotate at high speed, ensuring the stable formation of the steel wire mesh.
[0049] Please refer to Figure 5 Furthermore, the feeding assembly 42 includes a lifting motor 421 and a clamp 422. The fixed end of the lifting motor 421 is mounted on the top of the machine frame component 20, and the lifting end extends into the machine frame component 20. The fixed end of the clamp 422 is mounted on the lifting end of the lifting motor 421, and the clamping end is used to hold the silicon ingot, so that the silicon ingot is fed to the steel wire mesh for cutting as the lifting end of the lifting motor 421 descends. Specifically, the lifting motor 421 drives the clamp 422 to descend, and the clamp 422 holds the silicon ingot and slowly feeds it into the steel wire mesh. The descent speed is precisely controlled by an integrated control unit to match the cutting progress. During the cutting process, the lifting motor 421 adjusts the descent speed according to a preset program to ensure stable cutting.
[0050] Please refer to Figure 6 Secondly, the present invention provides a control method for a multi-wire cutting machine 10 based on the above-described method for reducing the torsional force of steel wires, comprising the following steps:
[0051] S1, through a monitoring camera, acquires images of the corresponding steel wire segment in real time and uploads the images to the integrated control unit;
[0052] S2, the integrated control unit calculates the deviation between the current torsion angle and the predetermined torsion angle based on the uploaded image of the steel wire;
[0053] S3. If the deviation value exceeds the preset threshold, proceed to step S4; otherwise, return to step S2. The preset threshold is set according to the steel wire material and cutting process.
[0054] S4, the integrated control unit sends a control signal to the corresponding deflection motor 515 according to the deviation value, drives the deflection component 512 to drive the deflection guide wheel 513 to deflect at the corresponding angle until the deviation value is less than the preset threshold, and returns to step S2.
[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A multi-wire saw for reducing torsional forces in steel wire, characterized in that The application relates to a steel wire cutting device, which comprises a rack component, a pay-off and take-up component, a cutting component and an adjusting component, the pay-off and take-up component is installed on the side of the rack component, the pay-off and take-up component comprises a pay-off assembly and a take-up assembly, the pay-off assembly is used for conveying steel wire to the cutting component, and the take-up assembly is used for recovering the steel wire from the cutting component; the cutting component is installed at one end of the rack component and is used for forming dense steel wire meshes to cut silicon ingots into silicon wafers through the steel wire meshes; the adjusting component comprises two structure-same deflection assemblies and a monitoring assembly, the fixed ends of the two deflection assemblies are installed on the rack component and are respectively located at the wire inlet end and the wire outlet end of the cutting component, and the steel wire is wound on the guide ends of the two deflection assemblies; the monitoring assembly is electrically connected with the two deflection assemblies to monitor the state of the steel wire in real time and control the guide end of the corresponding deflection assembly to deflect when the steel wire is twisted, so that the contact angle between the steel wire and the guide end of the deflection assembly is changed.
2. The multi-wire saw for reducing torsion force of steel wires according to claim 1, wherein Each deflection assembly comprises a deflection support, a deflection piece, a deflection guide wheel, a deflection gear and a deflection motor, the bottom of the deflection support is fixedly installed on the rack component, the deflection piece is semicircular and is rotatably installed on the top of the deflection support, the deflection guide wheel is installed in the central plane of the deflection piece to contact and guide the steel wire, the arc-shaped outer edge of the deflection piece is provided with a tooth pattern to form an arc-shaped gear rack, the deflection gear is rotatably installed in the middle of the deflection support and is engaged with the arc-shaped gear rack to drive the deflection piece to rotate around the side mounting point, and the fixed end of the deflection motor is installed on the deflection support and is drivingly connected with the deflection gear to drive the deflection gear to rotate, so that the deflection piece and the deflection guide wheel are driven to deflect through the arc-shaped gear rack, and the contact angle between the steel wire and the deflection guide wheel is changed.
3. The multi-wire saw for reducing torsion force of steel wires according to claim 2, wherein The monitoring assembly comprises two monitoring cameras and an integrated control unit, the two monitoring cameras are correspondingly arranged near the two deflection assemblies and are focused on the steel wire segment passing through the corresponding deflection guide wheel, and the integrated control unit is electrically connected with the two monitoring cameras and the deflection motors of the two deflection assemblies to control the corresponding deflection motor to rotate according to the steel wire image information collected by the monitoring camera in real time, so that the contact angle between the corresponding deflection guide wheel and the steel wire is changed.
4. The multi-wire saw that reduces torsion force of steel wire according to claim 1, wherein The pay-off and take-up component further comprises at least two tension adjusting assemblies, each tension adjusting assembly comprises a tension adjusting shaft, a shaft coupling, a tension adjusting guide wheel and a tension adjusting motor, the first end of the tension adjusting shaft is rotatably installed on the rack component, the first end of the shaft coupling is installed on the second end of the tension adjusting shaft, the tension adjusting guide wheel is installed on the second end of the shaft coupling, and the steel wire is wound around the tension adjusting guide wheel; the fixed end of the tension adjusting motor is installed on the rack component and is drivingly connected with the first end of the tension adjusting shaft to drive the tension adjusting shaft to rotate, so that the shaft coupling and the tension adjusting guide wheel are swung to change the running path of the steel wire and adjust the tension of the steel wire. 5. The multi-wire saw that reduces torsion force of steel wire according to claim 4, wherein The pay-off assembly comprises a pay-off drum, at least four pay-off guide rollers and a pay-off motor. The pay-off drum is rotatably mounted on the frame member for carrying and releasing the steel wire. The fixed end of the pay-off motor is mounted on the frame member, and the driving end is drivingly connected with the pay-off drum to control the rotation speed of the pay-off drum. The pay-off guide rollers are sequentially mounted along the running path of the steel wire from the pay-off drum to the cutting member to guide and change the running direction of the steel wire. In the process of being guided by the pay-off guide rollers, the steel wire at least passes around the tension adjusting guide roller of the tension adjusting assembly to adjust the tension of the steel wire on the pay-off side.
6. The multi-wire saw that reduces torsion force of steel wire according to claim 5, wherein The take-up assembly comprises a take-up drum, at least four take-up guide rollers and a take-up motor. The take-up drum is rotatably mounted on the frame member for winding and recycling the cut steel wire. The fixed end of the take-up motor is mounted on the frame member, and the driving end is drivingly connected with the take-up drum to control the rotation speed of the take-up drum. The take-up guide rollers are sequentially mounted along the running path of the steel wire from the cutting member to the take-up drum to guide and change the running direction of the steel wire. In the process of being guided by the take-up guide rollers, the steel wire at least passes around the tension adjusting guide roller of the tension adjusting assembly to adjust the tension of the steel wire on the take-up side.
7. The multi-wire saw that reduces torsion force of steel wire according to claim 1, wherein The cutting member comprises a wire mesh assembly and a feeding assembly. The wire mesh assembly comprises a wire mesh frame and two wire mesh rollers. The wire mesh frame is mounted on the frame member, and the two wire mesh rollers are rotatably mounted at the two ends of the wire mesh frame. At least two annular grooves for arranging the steel wire are formed on the two wire mesh rollers to enable the steel wire to repeatedly wind between the two wire mesh rollers and form a dense steel wire mesh. The feeding assembly is mounted on the frame member and located above the wire mesh assembly for clamping and lifting the silicon ingot to send the silicon ingot to the steel wire mesh for cutting.
8. The multi-wire saw that reduces torsion force of steel wire according to claim 7, wherein The feeding assembly comprises a lifting motor and a clamp. The fixed end of the lifting motor is mounted on the top of the frame member, and the lifting end extends into the frame member. The fixed end of the clamp is mounted on the lifting end of the lifting motor, and the clamping end is used for mounting the silicon ingot to send the silicon ingot to the steel wire mesh for cutting as the lifting end of the lifting motor descends.
9. A control method of a multi-wire saw for reducing torsional force of a steel wire based on any one of claims 1 to 8, characterized by, The method comprises the following steps: S1, real-time image acquisition of the corresponding steel wire segment is performed by a monitoring camera, and the image is uploaded to an integrated control unit; S2, the integrated control unit calculates the deviation value of the current torsion angle and the predetermined torsion angle according to the uploaded steel wire image; S3, if the deviation value exceeds the preset threshold value, step S4 is entered, otherwise, step S2 is returned; S4, the integrated control unit sends a control signal to the corresponding deflection motor according to the deviation value to drive the deflection member to deflect the deflection guide roller by a corresponding angle until the deviation value is less than the preset threshold value, and step S2 is returned.