Zero making method and system for cutting depth and relying depth of lithium electrode plate slitting knife rest

Abstract

The invention relates to the technical field of lithium electrode plates, in particular to a lithium electrode plate slitting knife rest engagement and relying change making method and system, and the method comprises the steps: lifting an upper knife to an initial safety position in the Z-axis direction, and fixing the upper knife; the upper cutter is positioned to a preset change position on the X axis, and the Z axis is started to move downwards at a preset feeding speed, so that the upper cutter moves towards the lower cutter; collecting a conduction signal and recording the Z-axis position at the moment as an original zero point of the cutting depth when the conduction signal is generated in the detection circuit at the moment that the upper cutter is in contact with the lower cutter; the upper cutter moves reversely along the Z axis according to the preset compensation amount, so that the upper cutter retreats from the original zero point by the preset compensation amount, and the position is recorded as a final cutter penetration zero point; and writing and storing the final cutting penetration zero point and taking the final cutting penetration zero point as a reference position for subsequent processing. According to the invention, the change making process is changed from a traditional manual visual inspection mode to an electric signal triggering-based automatic detection mode, meanwhile, the results of multiple change making are highly consistent, and the repeated error is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of lithium electrode sheet technology, and in particular to a method and system for zeroing the cutting depth and contact depth of a lithium electrode sheet slitting tool holder. Background Technology

[0002] Lithium-ion electrode sheet slitting tools have two key parameters: cut depth and cut angle. The cut depth, in particular, requires increasingly higher precision, typically down to the micrometer level. Therefore, the accuracy of the zero-point alignment for these two parameters directly affects the slitting quality of the electrode sheets. Currently, the industry commonly uses manual visual inspection or a combination of tools and visual inspection to zero the cut depth and cut angle of lithium-ion electrode sheet slitting tools (commonly known as tool setting). This method heavily relies on the operator's experience and methods, and is susceptible to human error and other factors that can compromise the accuracy of the zero-point alignment. Furthermore, the results of the first and second tool setting may differ significantly, and uniqueness cannot be effectively guaranteed.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] This invention provides a method and system for zeroing the cutting depth and contact depth of a lithium electrode sheet slitting tool holder, thereby effectively solving the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for zeroing the cutting depth of a lithium electrode sheet slitting tool holder includes the following steps: Raise the upper tool to the initial safe position in the Z-axis direction and fix it; Position the upper tool on the X-axis to the predetermined zeroing position, and start the Z-axis downward movement at the predetermined feed rate, so that the upper tool moves towards the lower tool; When the upper tool contacts the lower spacer and a conduction signal is generated in the detection circuit, the conduction signal is acquired and the Z-axis position at this moment is recorded as the original zero point of the depth of cut. According to the preset compensation amount, the upper tool is moved in the opposite direction along the Z-axis, so that the upper tool moves back from the original zero point by the preset compensation amount and the position is recorded as the final cutting zero point. The final cut zero point is written into storage and used as a reference position for subsequent processing.

[0006] A method for zeroing lithium electrode sheet cutting by tool measurement includes the following steps: Move the upper tool along the Y-axis to the lower tool groove, and slowly lower it along the Z-axis to the preset cutting depth within the tool groove; Start the upper tool to move laterally along the Y-axis at a predetermined feed rate, so that the upper tool moves to the tool face of the lower tool; When the upper and lower cutting tools come into contact and a conduction signal is generated in the detection circuit, the conduction signal is acquired and the Y-axis coordinate at this moment is recorded as the original zero point of the cutting tool. According to the preset compensation amount, the upper tool is moved in the opposite direction along the Y-axis, so that the upper tool moves back from the original zero point by the preset compensation amount and the position is recorded as the final tool zero point. The final zero point of the tool is written into storage and used as a reference position for subsequent processing.

[0007] Furthermore, the upper cutter shaft is connected to the tool holder via a ceramic angular contact bearing, which electrically insulates the upper cutter from the tool holder, ensuring that the conduction signal is generated only when the upper cutter and the lower cutter are in mechanical contact.

[0008] Furthermore, an insulating structure is provided between the outer ring or bearing housing of the ceramic angular contact bearing and the frame, and the lower blade is connected to the detection circuit through a signal lead-out block, and the other end of the detection circuit is connected to the upper blade or the contact end fixed to the upper blade.

[0009] Furthermore, the conduction signal is a voltage or current signal, and a current-limiting resistor and a filter circuit are used to protect and filter the detection circuit when acquiring the conduction signal.

[0010] Furthermore, the preset compensation amount can be automatically adjusted based on historical change data, or manually set by the operator through the human-machine interface; and before writing the final cut point, the verification information, including the timestamp, machine number, and change process sampling curve, is recorded.

[0011] Furthermore, the predetermined feed rate is an adjustable parameter, and a low-speed constant feed is used during the zeroing process.

[0012] The present invention also includes a lithium electrode sheet slitting tool holder depth finding system, comprising: An upper tool assembly, wherein the upper tool assembly is provided with an upper tool and is connected to the upper tool shaft via a ceramic angular contact bearing; A cutting assembly, wherein the cutting assembly is configured to cut and electrically connected to the signal lead-out terminal of the detection circuit; The detection module is used to provide detection power between the upward and downward blades and to acquire the conduction signal; The motion control unit is electrically connected to the upper tool assembly and controls the movement of the upper tool along the X, Y, and Z axes; and The controller is electrically connected to the detection module and the motion control unit, and is used to execute the above-mentioned zeroing method for cutting depth and write the final zeroing point of cutting depth into storage.

[0013] The present invention also includes a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method as described above.

[0014] The present invention also includes a storage medium having a computer program stored thereon, which, when executed by a processor, implements the method as described above.

[0015] The beneficial effects of this invention are as follows: By establishing an electrical signal detection circuit between the upper and lower cutting tools and combining it with automatic motion control to achieve zero-point determination and compensation, the zero-finding process is transformed from the traditional manual visual inspection method to an automatic detection method based on electrical signal triggering. Since an electrical conduction signal is used as the basis for determining the contact between the upper and lower cutting tools, the uncertainty of manual visual inspection or experience-based judgment is avoided, making zero-point determination entirely dependent on objective electrical signals. By controlling the upper cutting tool to feed slowly at a constant speed, the conduction event at the moment of contact between the upper and lower cutting tools can be accurately captured, enabling zero-point detection accuracy to reach the micrometer level; simultaneously, the results of multiple zero-finding attempts are highly consistent, and the repetition error is significantly reduced. No longer relying on human factors such as operator experience, eyesight, and touch, it greatly improves operational consistency and reduces the risk of human error and misoperation, thereby enhancing the stability and controllability of the whole machine. Since the final cut zero point is automatically collected, compensated, and stored by the system, it can provide a high-precision reference benchmark for subsequent setting of cut depth and cut amount, which reduces the control error of the two parameters, makes the cutting gap more stable, and helps to improve the flatness and consistency of the lithium electrode sheet cut, and reduce burrs and scratches. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart for the method of zeroing out the cut amount; Figure 2 Diagram showing how to find the zero for the cutting depth; Figure 3 A flowchart for the zero-finding method based on tool measurement; Figure 4 A schematic diagram for zeroing the tool position; Figure 5 This is a schematic diagram of the upper blade assembly; Figure 6 Screenshot of the system interface for calculating the cut amount; Figure 7 This is a schematic diagram of the structure of the computer device of the present invention. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] like Figure 1 and Figure 2 The following is a method for zeroing the cutting depth of a lithium electrode sheet slitting tool holder, comprising the following steps: Raise the upper tool to the initial safe position in the Z-axis direction and fix it; Position the upper tool on the X-axis to the predetermined zeroing position, and start the Z-axis downward movement at the predetermined feed rate, so that the upper tool moves towards the lower tool; When the upper tool contacts the lower spacer and a conduction signal is generated in the detection circuit, the conduction signal is acquired and the Z-axis position at this moment is recorded as the original zero point of the depth of cut. According to the preset compensation amount, the upper tool is moved in the opposite direction along the Z-axis, so that the upper tool moves back from the original zero point by the preset compensation amount and the position is recorded as the final cutting zero point. The final cut point is written to storage and used as a reference position for subsequent processing.

[0020] like Figure 3 and Figure 4 As shown, a method for zeroing lithium electrode sheet cutting by tool measurement includes the following steps: Move the upper tool along the Y-axis to the lower tool groove, and slowly lower it along the Z-axis to the preset cutting depth within the tool groove; Start the upper tool to move laterally along the Y-axis at a predetermined feed rate, so that the upper tool moves to the tool face of the lower tool; When the upper and lower cutting tools come into contact and a conduction signal is generated in the detection circuit, the conduction signal is acquired and the Y-axis coordinate at this moment is recorded as the original zero point of the cutting tool. According to the preset compensation amount, the upper tool is moved in the opposite direction along the Y-axis, so that the upper tool moves back from the original zero point by the preset compensation amount and the position is recorded as the final tool zero point. The final zero point of the tool is written to storage and used as a reference position for subsequent machining.

[0021] By establishing an electrical signal detection loop between the upper and lower blades and combining it with automatic motion control to achieve zero-point determination and compensation, the zero-finding process is transformed from traditional manual visual inspection to an automatic detection method triggered by electrical signals. Since the electrical conduction signal is used as the basis for determining the contact between the upper and lower blades, the uncertainty of manual visual inspection or experience-based judgment is avoided, making zero-point determination entirely dependent on objective electrical signals. By controlling the upper blade to feed slowly at a constant speed, the conduction event at the moment of contact between the upper and lower blades can be accurately captured, achieving a zero-point detection accuracy down to the micrometer level. Simultaneously, the results of multiple zero-finding operations are highly consistent, significantly reducing repetition errors. Eliminating reliance on human factors such as operator experience, eyesight, and touch greatly improves operational consistency and reduces the risk of human error and misoperation, thereby enhancing the stability and controllability of the entire machine. Because the final cut zero point is automatically collected, compensated, and stored by the system, it provides a high-precision reference benchmark for subsequent setting of the cut depth and contact depth, reducing control errors of these two parameters, resulting in a more stable cutting gap. This is beneficial for improving the flatness and consistency of the lithium electrode sheet cut and reducing burrs and scratches.

[0022] In this embodiment, the upper tool shaft is connected to the tool holder via a ceramic angular contact bearing, which makes the upper tool and the tool holder electrically insulated, and the upper tool and the lower tool only form a conduction signal when they are in mechanical contact.

[0023] The insulation resistance of ceramic angular contact bearings is typically above several hundred megohms, effectively isolating the conductive path between the upper tool and the frame / drive motor. This prevents stray currents or electrical noise from the frame from interfering with the detection signal, ensuring that the continuity signal is triggered only by actual contact between the upper and lower tools. Because the upper tool is insulated from the tool holder, the detection circuit only forms a closed loop when the upper tool edge contacts the lower tool. This structural design avoids false continuity caused by factors such as oil contamination, electrostatic discharge, and mechanical vibration, ensuring that the triggering of the continuity signal has a clear physical correspondence and achieving high reliability and uniqueness in zero-point determination.

[0024] The outer ring or bearing housing of the ceramic angular contact bearing is provided with an insulating structure between it and the frame, and the lower blade is connected to the detection circuit through a signal lead-out block. The other end of the detection circuit is connected to the upper blade or the contact end fixed to the upper blade.

[0025] Building upon the axial insulation provided by ceramic bearings, an additional insulating layer is added between the bearing outer ring or bearing housing and the frame. This effectively prevents weak conductive paths caused by assembly tolerances, metal dust, or lubricating oil films, further ensuring complete electrical isolation between the upper tool and the frame, and improving the anti-interference capability and stability of the detection system. By installing a signal lead-out block on the lower tool side, the detection circuit can be quickly connected and maintained outside the equipment. This facilitates signal integrity testing or fault diagnosis without disassembling the tool, improving equipment maintenance efficiency and operational reliability.

[0026] As a preferred embodiment of the above, the conduction signal is a voltage or current signal, and a current-limiting resistor and a filter circuit are used to protect and filter the detection circuit when acquiring the conduction signal.

[0027] When the upper and lower cutting tools make contact, the detection circuit changes from an open circuit to a conducting circuit. Without current limiting measures, the instantaneous current may be too large and damage the signal acquisition terminal or the controller input module. By setting a current limiting resistor, the peak current of the circuit can be effectively limited, avoiding problems such as device burnout and contact erosion caused by sudden current changes, thereby significantly improving the electrical safety and long-term stability of the system.

[0028] By configuring an RC filter or low-pass filter circuit in the detection loop, transient glitches caused by high-frequency interference and mechanical vibration can be filtered out, preventing the controller from incorrectly determining the conduction event.

[0029] The filtering circuit can smooth the signal waveform, so that the detection module responds only to real and stable conduction signals, thereby improving the accuracy of zero-point triggering determination.

[0030] In this embodiment, the preset compensation amount can be automatically adjusted based on historical change data, or manually set by the operator through the human-machine interface; and before writing the final cut zero point, the verification information, including the timestamp, machine number and change process sampling curve, is recorded.

[0031] The system automatically corrects preset compensation amounts through statistical analysis of multiple historical zero-finding data, ensuring that the compensation value matches actual working conditions such as mechanical return clearance and blade elastic deformation. This reduces human error and achieves self-learning precision optimization. Automatic compensation adjustment ensures that the upper blade disengages precisely from the lower blade contact state after retraction, guaranteeing a closer fit between the final cutting zero point and the actual physical position. In addition to automatic adjustment, operators can also manually set the compensation amount through the human-machine interface according to process requirements or tool characteristics, meeting the zero-finding needs of electrodes of different materials and thicknesses, thus improving the system's adaptability and process compatibility.

[0032] The predetermined feed rate is an adjustable parameter, and a low-speed constant feed is used during the zeroing process.

[0033] Under low-speed constant-speed feed conditions, the contact process between the upper and lower tools is smooth and controllable, with low mechanical inertia. This results in a more stable trigger time for the conduction signal and smoother waveform changes, making it easier for the controller to accurately identify the conduction event at the moment of contact between the upper and lower tools, thereby improving the accuracy of zero-point determination. Using low-speed feed effectively avoids large impact forces generated when the upper tool contacts the lower tool, preventing chipping, scratching, or deformation of the cutting edge. Simultaneously, it reduces the impact force on the lower tool, helping to extend tool life and maintain the stability of the cutting edge geometry.

[0034] like Figure 5As shown, this embodiment also includes a lithium electrode sheet slitting tool holder depth-finding system, comprising: The upper tool assembly sets up the upper tool and connects it to the upper tool shaft via a ceramic angular contact bearing. The cutting assembly is configured to cut and electrically connected to the signal output terminal of the detection circuit; The detection module is used to provide detection power between the upward and downward blades and to acquire the conduction signal; The motion control unit is electrically connected to the upper tool assembly and controls the movement of the upper tool along the X, Y, and Z axes; and The controller is electrically connected to the detection module and the motion control unit, and is used to execute the above-mentioned zeroing method for cutting depth and write the final zeroing point of cutting depth into storage.

[0035] Upon detecting a conduction signal, the system automatically completes zero-point recording and compensation operations without manual visual inspection or fine-tuning, significantly reducing operational complexity and human error. The controller can store the time of each zero-finding operation, machine number, and sampling curve data for accuracy verification, process optimization, and equipment status monitoring, meeting the quality tracking requirements of intelligent manufacturing.

[0036] Please see Figure 6 and Figure 7 The diagram shows a structural schematic of a computer device provided in an embodiment of this application. An embodiment of this application provides a computer device 400, including a processor 410 and a memory 420. The memory 420 stores a computer program executable by the processor 410. When the computer program is executed by the processor 410, it performs the method described above.

[0037] This application embodiment also provides a storage medium 430, on which a computer program is stored, and the computer program is executed by a processor 410 to perform the above method.

[0038] The storage medium 430 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0039] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0043] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0044] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0045] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0046] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for zeroing the cutting depth of a lithium electrode sheet slitting tool holder, characterized in that, Includes the following steps: Raise the upper tool to the initial safe position in the Z-axis direction and fix it; Position the upper tool on the X-axis to the predetermined zeroing position, and start the Z-axis downward movement at the predetermined feed rate, so that the upper tool moves towards the lower tool; When the upper tool contacts the lower spacer and a conduction signal is generated in the detection circuit, the conduction signal is acquired and the Z-axis position at this moment is recorded as the original zero point of the depth of cut. According to the preset compensation amount, the upper tool is moved in the opposite direction along the Z-axis, so that the upper tool moves back from the original zero point by the preset compensation amount and the position is recorded as the final cutting zero point. The final cut zero point is written into storage and used as a reference position for subsequent processing.

2. A method for cutting lithium electrode sheets to zero by using a cutting tool, characterized in that, Includes the following steps: Move the upper tool along the Y-axis to the lower tool groove, and slowly lower it along the Z-axis to the preset cutting depth within the tool groove; Start the upper tool to move laterally along the Y-axis at a predetermined feed rate, so that the upper tool moves to the tool face of the lower tool; When the upper and lower cutting tools come into contact and a conduction signal is generated in the detection circuit, the conduction signal is acquired and the Y-axis coordinate at this moment is recorded as the original zero point of the cutting tool. According to the preset compensation amount, the upper tool is moved in the opposite direction along the Y-axis, so that the upper tool moves back from the original zero point by the preset compensation amount and the position is recorded as the final tool zero point. The final zero point of the tool is written into storage and used as a reference position for subsequent processing.

3. The method according to claim 1 or 2, characterized in that, The upper cutter shaft is connected to the tool holder via a ceramic angular contact bearing, which electrically insulates the upper cutter from the tool holder and ensures that the conduction signal is generated only when the upper cutter and the lower cutter are in mechanical contact.

4. The method according to claim 3, characterized in that, An insulating structure is provided between the outer ring or bearing housing of the ceramic angular contact bearing and the frame, and the lower blade is connected to the detection circuit through a signal lead-out block. The other end of the detection circuit is connected to the upper blade or the contact end fixed to the upper blade.

5. The method according to claim 1 or 2, characterized in that, The conduction signal is a voltage or current signal, and a current-limiting resistor and a filter circuit are used to protect and filter the detection circuit when acquiring the conduction signal.

6. The method according to claim 1 or 2, characterized in that, The preset compensation amount can be automatically adjusted based on historical change data, or manually set by the operator through the human-machine interface; and before writing the final cut zero point, the verification information, including the timestamp, machine number and change process sampling curve, is recorded.

7. The method according to claim 1 or 2, characterized in that, The predetermined feed rate is an adjustable parameter, and a low-speed constant feed is used during the zeroing process.

8. A zeroing system for the cutting depth of a lithium electrode sheet slitting tool holder, characterized in that, include: An upper tool assembly, wherein the upper tool assembly is provided with an upper tool and is connected to the upper tool shaft via a ceramic angular contact bearing; A cutting assembly, wherein the cutting assembly is configured to cut and electrically connected to the signal lead-out terminal of the detection circuit; The detection module is used to provide detection power between the upward and downward blades and to acquire the conduction signal; The motion control unit is electrically connected to the upper tool assembly and controls the movement of the upper tool along the X, Y, and Z axes; and The controller is electrically connected to the detection module and the motion control unit, and is used to execute the zeroing method for cutting depth as described in any one of claims 1 to 7 and write the final zeroing point of cutting depth into storage.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method as described in any one of claims 1-7.

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