A laser cutting production line for chain manufacturing

Abstract

The application discloses a laser cutting production line for chain manufacturing and relates to the technical field of chain production cutting tools. The production line comprises a positioning table, a first lead screw, a guide rod, a limiting block, a guide roller and a detection assembly, and is provided with a data acquisition unit, a data processing unit and a control execution unit. The detection assembly comprises a supporting table, a second lead screw and a laser sensor and the like structure, can collect material size and position signals, drive a servo motor and a driving motor to act after data processing, drive the displacement of the limiting block and the laser sensor, realize automatic centering positioning of the material and self-adaptive adjustment of the detection position, and simultaneously configure a closed-loop correction unit to correct the position of the limiting block in real time. The application can replace manual adjustment, improve positioning and cutting precision, adapt to processing of materials of multiple specifications, shorten the debugging time, reduce production cost, and improve the automation level and production efficiency of the production line.

Description

Technical Field

[0001] This invention relates to the field of chain production cutting tools, and more particularly to a laser cutting production line for chain manufacturing. Background Technology

[0002] With the rapid development of the chain manufacturing industry, the industry has continuously increased its requirements for raw material processing precision, production efficiency and specification adaptability. Laser cutting is widely used in the chain raw material cutting process due to its high cutting precision, good cut quality and excellent processing efficiency.

[0003] Existing laser cutting production lines for chain manufacturing mostly use fixed limiting structures or manually adjustable limiting components, which have problems such as low limiting accuracy, low adjustment efficiency, and poor specification adaptability. Lateral deviation is prone to occur during the raw material conveying process, resulting in cutting size deviations and cut defects, reducing the qualified rate of finished chain products. Special limiting components need to be replaced for different specifications of raw materials, which increases debugging time and production costs, making it difficult to meet the needs of automated, high-precision, and multi-specification continuous production. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of low positioning and adjustment accuracy, insufficient automation, and poor specification adaptability in the existing technology, and to provide a laser cutting production line for chain manufacturing, which realizes automatic detection, automatic positioning, stable conveying and precise cutting of raw materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a laser cutting production line for chain manufacturing, comprising positioning platforms installed at the four corners of the top surface of a laser cutting machine, characterized in that: a first lead screw is rotatably connected to the proximal surfaces of the two front positioning platforms, a guide rod is fixedly connected to the proximal surfaces of the two rear positioning platforms, a limit block is threadedly connected to the two first lead screws, a sliding hole adapted to the sliding of the guide rod is opened at the other end of the limit block, and a plurality of equidistant rotating grooves are opened on the inner side of the two limit blocks, a guide roller is rotatably connected in the rotating groove, and a detection component for detecting different raw material lengths is installed on the top surface of the two front positioning platforms; It also includes an intelligent control system, which includes a data acquisition unit, a data processing unit, and a control execution unit. The data acquisition unit is electrically connected to the detection component and is used to acquire raw material size signals and position signals. The data processing unit is used to analyze, calculate, and generate instructions from the acquired signals. The control execution unit is electrically connected to the first lead screw drive mechanism and the detection component drive mechanism and is used to perform positioning adjustment and detection positioning actions.

[0006] Preferably, the detection component includes a support platform installed on the top surface of the two front positioning platforms. The support platform has a U-shaped cross-section, and a T-shaped groove is opened horizontally through the bottom surface of the support platform. A baffle is vertically installed in the middle of the bottom surface of the support platform.

[0007] Preferably, a second lead screw is rotatably connected between the two sides of the inner wall of the support platform and the two sides of the baffle. The distal ends of the two second lead screws penetrate the support platform, and the distal ends of the two second lead screws are connected to a drive motor installed on the outer wall of the support platform through a coupling.

[0008] Preferably, the second lead screw is threadedly connected to a movable block adapted to a T-slot, and a detection groove is provided on the bottom surface of the movable block, in which a laser sensor is installed.

[0009] Preferably, the distal ends of both first lead screws pass through the corresponding positioning platform, and the distal ends of both first lead screws are connected to a servo motor mounted on the outside of the positioning platform via a coupling.

[0010] Preferably, the data acquisition unit includes a signal acquisition module and a signal conversion module. The signal acquisition module is electrically connected to the laser sensor and is used to acquire the edge position signal of the raw material. The signal conversion module is used to convert the analog signal into a digital signal and transmit it to the data processing unit.

[0011] Preferably, the data processing unit includes a storage module, a calculation module, and an instruction output module. The storage module is used to pre-store raw material specification parameters and positioning thresholds, the calculation module is used to compare and calculate the acquired signals with the pre-stored parameters, and the instruction output module is used to generate positioning adjustment instructions and detection positioning instructions.

[0012] Preferably, the control execution unit includes a servo drive module and a motor drive module. The servo drive module is electrically connected to a servo motor and is used to drive the first lead screw to move the limit block. The motor drive module is electrically connected to a drive motor and is used to drive the second lead screw to move the moving block.

[0013] Preferably, the inner side of the limiting block is provided with a rolling guide structure, which cooperates with the guide roller to form a continuous guide surface, used to reduce the frictional resistance of raw material conveying and constrain the lateral displacement of the raw material.

[0014] Preferably, the production line is equipped with a closed-loop correction unit, which is used to acquire the feedback signal from the laser sensor in real time, dynamically correct the position of the limit block, and maintain the alignment of the raw material conveying.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution addresses the problems of low positioning accuracy and easy material deviation in existing laser cutting production lines that rely on manual adjustment of limit blocks. By using a servo motor to drive the first lead screw, the limit blocks are automatically displaced. Combined with a laser sensor to detect the material position, the material is automatically centered and positioned, replacing manual adjustment. This eliminates positioning errors caused by manual adjustment, avoids lateral deviation and skewing during material transport, reduces laser cutting dimensional deviations and uneven cuts, improves the finished product qualification rate of the chain, and eliminates manual measurement and adjustment processes, shortening positioning and debugging time and improving production efficiency.

[0016] 2. This solution addresses the problems of existing production lines requiring customized limit components to adapt to different specifications of raw materials, resulting in poor specification compatibility and high production costs. By using a drive motor to drive a second lead screw, which in turn drives a laser sensor to adaptively adjust the detection position, and in conjunction with an automatically displaceable limit block, it can adapt to chain raw materials of different sizes. There is no need to customize or replace dedicated limit components, reducing equipment customization and component replacement costs, shortening the time for production changeover and debugging, improving the production line's adaptability to multiple specifications of raw materials, and meeting the needs of continuous production of multiple specifications in the chain manufacturing industry.

[0017] 3. This solution addresses the problems of low automation in existing production lines, inability to correct gradual offsets in raw material conveying in real time, and poor consistency in cutting dimensions. It achieves automated control of signal acquisition, calculation, and command execution through a data acquisition unit, data processing unit, and control execution unit. A closed-loop correction unit is configured to obtain feedback signals from the laser sensor in real time, dynamically correct the position of the limit block, continuously maintain the alignment of raw material conveying, eliminate offset problems caused by tension fluctuations and equipment vibration during conveying, ensure the consistency of dimensions in continuous cutting, and improve the automation level and operational stability of the production line.

[0018] In summary, this solution comprehensively addresses the shortcomings of existing laser cutting production lines for chain manufacturing, such as low positioning accuracy, insufficient automation, poor specification adaptability, low finished product qualification rate, and high debugging and production costs, through automatic positioning adjustment, multi-specification adaptive adaptation, and closed-loop correction during the conveying process. It achieves automatic raw material detection, automatic positioning, stable conveying, and precise cutting, effectively improving production efficiency, finished product qualification rate, and multi-specification production adaptability, while reducing production input and debugging time, and meeting the industry's requirements for automated, high-precision, and continuous production. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure proposed in Example 1; Figure 2This is a cross-sectional view of the overall structure proposed in Example 1; Figure 3 This is a schematic diagram of the limiting block and guide roller structure proposed in Example 1; Figure 4 The example proposed in Example 1 Figure 2 Enlarged diagram of part A in the middle; Figure 5 This is a block diagram of the intelligent control system proposed in Example 1; Figure 6 This is the overall principle block diagram proposed in Example 2; Figure 7 This is a block diagram illustrating the principle of the closed-loop correction unit proposed in Example 3.

[0020] The numbers in the diagram are: 1. Positioning table; 2. First lead screw; 3. Servo motor; 4. Guide rod; 5. Limit block; 6. Guide roller; 7. Support platform; 8. Baffle; 9. Drive motor; 10. Moving block; 11. Laser sensor; 12. Second lead screw. Detailed Implementation

[0021] 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.

[0022] The orientation definitions need to be clearly defined in advance: In this invention, the longitudinal direction is the conveying direction of the chain material, the transverse direction is the horizontal direction perpendicular to the conveying direction of the material; the front end is the feeding end of the material entering the laser cutting machine, and the rear end is the discharge end after the material is cut; the adjacent surfaces are the inner surfaces of the two positioning tables 1 facing each other, so as to describe the orientation in a unified way.

[0023] Example 1

[0024] See Figures 1-5This embodiment discloses a laser cutting production line for chain manufacturing, including positioning platforms 1 fixedly installed at the four corners of the top surface of the laser cutting machine body. The four positioning platforms 1 are symmetrically arranged in two groups on the left and right sides of the feed end and the discharge end of the laser cutting machine. A first lead screw 2 is rotatably connected between the adjacent surfaces of the two front positioning platforms 1 via bearing seats. The two first lead screws 2 are coaxially arranged and have opposite thread directions. A guide rod 4 is fixedly connected between the adjacent surfaces of the two rear positioning platforms 1. The two guide rods 4 are coaxially arranged and parallel to the first lead screw 2. The rod bodies of the two first lead screws 2... Each of the two limit blocks 5 is threadedly connected to a limiting block 5. The rear end of the limiting block 5 is provided with a sliding hole that is clearance-fitted with the guide rod 4. The guide rod 4 passes through the sliding hole to form a linear movement guide pair for the limiting block 5. The inner surfaces of the two limiting blocks 5 are provided with multiple rotating grooves that are equidistantly arranged longitudinally. Each rotating groove is rotatably connected to a guide roller 6 via a rotating shaft. The axis of the guide roller 6 is vertically set, and the roller surface of the guide roller 6 protrudes from the inner surface of the limiting block 5 for rolling contact with the side of the chain material. The top surfaces of the two front positioning platforms 1 are fixedly installed with detection components for detecting different material sizes and positions.

[0025] The production line is equipped with an intelligent control system, which includes a data acquisition unit, a data processing unit, and a control execution unit. The signal input terminal of the data acquisition unit is electrically connected to the signal output terminal of the detection component, and is used to acquire the lateral dimension signal and edge position signal of the chain raw material. The signal input terminal of the data processing unit is electrically connected to the signal output terminal of the data acquisition unit, and is used to analyze, calculate, determine deviations, and generate control commands for the acquired signals. The signal input terminal of the control execution unit is electrically connected to the signal output terminal of the data processing unit, and the power output terminal of the control execution unit is electrically connected to the drive mechanism of the first lead screw 2 and the drive mechanism of the detection component, respectively, and is used to execute the positioning adjustment action of the limit block 5 and the detection positioning action of the detection component.

[0026] In this embodiment, the detection component includes a support platform 7 fixedly installed on the top surface of the two front positioning platforms 1. The support platform 7 has a U-shaped cross-section, with its opening facing downwards and fixed to the top surface of the positioning platform 1. A T-shaped groove is transversely opened on the inner bottom surface of the support platform 7, and the length direction of the T-shaped groove is parallel to the axis of the first lead screw 2. A baffle 8 is vertically fixedly installed in the middle of the inner bottom surface of the support platform 7, dividing the inner cavity of the support platform 7 into two independent left and right adjustment chambers. The left and right sides of the inner wall of the support platform 7 and the left and right sides of the baffle 8 are rotatably connected to the second lead screw 12 through bearing seats. The two second lead screws 12 are coaxially arranged and located in the two adjustment chambers respectively. The distal ends of the two second lead screws 12, which are far apart, both penetrate the side wall of the support platform 7, and the distal ends of the two second lead screws 12 are fixedly connected to the drive motor 9 through a coupling. The drive motor 9 is fixedly installed on the outer side wall of the support platform 7 through a motor seat. A moving block 10 is threadedly connected to the body of the second lead screw 12. The bottom of the moving block 10 is provided with a T-shaped protrusion that fits with the T-shaped groove. The T-shaped protrusion is embedded in the T-shaped groove to form a linear movement guide pair for the moving block 10. A detection groove is opened on the bottom surface of the moving block 10. A laser sensor 11 is fixedly installed in the detection groove. The detection end of the laser sensor 11 faces downward and is directly opposite the top material conveying area of ​​the laser cutting machine.

[0027] In this embodiment, the distal ends of the two first lead screws 2 that are far apart both penetrate the side wall of the corresponding positioning table 1, and the distal ends of the two first lead screws 2 are fixedly connected to the servo motors 3 through couplings. The servo motors 3 are fixedly installed on the outer side wall of the positioning table 1 through motor mounts. The bottom surface of the limiting block 5 slides against the top surface of the laser cutting machine to prevent the limiting block 5 from deflecting around the axis during movement and to ensure movement stability.

[0028] The operation process of this embodiment is divided into four core steps: system initialization stage, detection component adaptive adjustment stage, raw material centering and positioning stage, and continuous cutting and guiding stage. The specific implementation of each step is as follows: Step 1: System Initialization Phase 1.1 Before powering on the equipment, the operator shall complete a full inspection of the equipment to confirm that there is no mechanical jamming in any of the following components: positioning table 1, first lead screw 2, servo motor 3, guide rod 4, limit block 5, guide roller 6, support table 7, baffle 8, drive motor 9, moving block 10, laser sensor 11, and second lead screw 12, and that the wiring is secure. The operator shall also confirm that the laser cutting machine body, external raw material unwinding device, and external winding device are in standby mode. 1.2 When the equipment is connected to the external power supply, the intelligent control system is powered on and started, and executes the system self-test program: zero-point calibration of the encoders of servo motor 3 and drive motor 9, continuity detection and calibration of laser sensor 11, and connectivity detection of the communication links of data acquisition unit, data processing unit and control execution unit; 1.3 After the self-inspection is completed without any abnormalities, the operator inputs the preset width parameters, cutting length parameters, and positioning allowable deviation threshold of the chain raw material to be processed through the human-machine interface of the intelligent control system. The parameters are stored in the storage module of the data processing unit. 1.4 The intelligent control system performs a reset action: it controls the servo motor 3 to drive the first lead screw 2 to rotate, thereby moving the two limit blocks 5 to the maximum opening positions on the left and right sides; it controls the drive motor 9 to drive the second lead screw 12 to rotate, thereby moving the two moving blocks 10 to the initial reference positions on the left and right sides of the support platform 7, thus completing the system initialization.

[0029] This stage eliminates initial position errors and sensor zero-point drift through standardized self-testing, parameter entry, and reset processes, ensuring a consistent benchmark for subsequent adjustment actions. The pre-storage of preset parameters provides a calculation benchmark for subsequent automated adjustments, avoiding repeated manual measurements and significantly shortening changeover and debugging time.

[0030] Step 2: Detection of component adaptive adjustment phase 2.1 The data processing unit retrieves the pre-stored raw material width parameters and executes the detection position positioning algorithm through the calculation module. The algorithm steps are as follows: Algorithm step S1: Taking the horizontal center axis of the laser cutting machine as the reference zero point X0, calculate the theoretical positions of the left and right sides of the material according to the preset width W of the material: theoretical position of the left side X1=X0-W / 2, theoretical position of the right side X2=X0+W / 2. Algorithm step S2: Based on the mounting reference of the left and right laser sensors 11, combined with the lead Ph of the second lead screw 12 and the encoder resolution R of the drive motor 9, calculate the target rotation pulse number of the drive motor 9: The target pulse count for the left-side drive motor is N1 = (X1 - Xleft0) / Ph × R The target pulse count for the right-side drive motor is N2 = (X2 - Xright0) / Ph × R Where X_left0 is the initial reference position of the left laser sensor 11, and X_right0 is the initial reference position of the right laser sensor 11. Algorithm step S3: The calculation module transmits the calculated N1 and N2 parameters to the instruction output module to generate control instructions for the drive motor 9.

[0031] 2.2 The motor drive module of the control execution unit receives the control command and outputs drive pulses to the drive motors 9 on the left and right sides respectively. The drive motors 9 drive the second lead screw 12 to rotate through the coupling. 2.3 The second lead screw 12 and the moving block 10 form a threaded transmission pair. Under the guidance and limit of the T-slot, the moving block 10 is driven to move in a straight line in the transverse direction until the encoder feedback pulse number of the drive motor 9 reaches the target pulse number. The drive motor 9 stops running and locks the shaft. At this time, the laser sensors 11 on the left and right sides are respectively positioned to the theoretical positions on the left and right sides of the raw material, and the adaptive adjustment of the detection component is completed.

[0032] This stage utilizes a detection position positioning algorithm to achieve fully automatic and high-precision adjustment of the laser sensor 11's detection position. For raw materials of different widths, no manual adjustment of the sensor position is required, significantly improving changeover efficiency. Through precise conversion between the lead screw pitch and encoder resolution, the sensor positioning accuracy can reach the micrometer level, far exceeding the accuracy of manual adjustment, providing a precise benchmark for subsequent raw material position detection.

[0033] Step 3: Raw material centering and positioning stage 3.1 The operator uses an external unwinding device to transport the flattened chain strip steel to between the two limit blocks 5 on the top surface of the laser cutting machine. The front end of the material extends to the area below the laser cutting head, completing the initial feeding. 3.2 The signal acquisition module of the data acquisition unit synchronously acquires the detection signals of the laser sensors 11 on the left and right sides at a fixed sampling frequency: the laser sensor 11 emits a laser beam downwards, and when the side of the raw material enters the detection range of the laser sensor 11, the laser sensor 11 outputs a high-level signal, and outputs a low-level signal when no raw material is detected; the signal acquisition module transmits the acquired level signal to the signal conversion module, converts it into a digital detection status signal, and transmits it to the data processing unit; 3.3 The data processing unit's arithmetic module receives the detection status signal and executes the raw material alignment deviation judgment and adjustment algorithm. The algorithm steps are as follows: Algorithm step T1: Combine and determine the detection status of the left and right laser sensors 11, which are divided into four working conditions: Operating Condition 1: The left sensor detects the raw material, and the right sensor detects the raw material → the raw material is determined to be aligned correctly, and no adjustment is required; Operating Condition 2: The left sensor detects raw material, but the right sensor does not detect raw material → It is determined that the raw material is shifted to the left and needs to be adjusted to the right; Operating Condition 3: The left sensor does not detect raw material, while the right sensor detects raw material → It is determined that the raw material is shifted to the right and needs to be adjusted to the left; Operating Condition 4: The left sensor does not detect raw material and the right sensor does not detect raw material → It is determined that the raw material position is out of the detection range, and an alarm signal is output to the human-machine interface to prompt the operator to reload the material; Algorithm step T2: For the offset states of working conditions 2 and 3, perform adjustment calculations: The adjustment unit is based on the single-step adjustment amount ΔS. ΔS is preset according to the positioning allowable deviation threshold. The number of single-step rotation pulses of the servo motor 3 corresponding to the single-step adjustment is ΔN = ΔS / Ph'×R', where Ph' is the lead of the first lead screw 2 and R' is the encoder resolution of the servo motor 3. If it is working condition 2 left deviation: Generate a forward rotation pulse command for the left servo motor and a reverse rotation pulse command for the right servo motor, which drives the two limit blocks 5 to move to the right synchronously, with a single step movement of ΔS. If it is working condition 3 right deviation: Generate a reverse pulse command for the left servo motor and a forward pulse command for the right servo motor, which will drive the two limit blocks 5 to move to the left synchronously, with a single step movement of ΔS. Algorithm step T3: After each single-step adjustment, the detection status signal of the laser sensor 11 is re-acquired, and the judgment of step T1 is repeated until working condition 1 is entered, the raw material is judged to be qualified, the adjustment is stopped, and the servo motor 3 shaft locking command is generated.

[0034] 3.4 The servo drive module of the control execution unit receives the adjustment command and outputs drive pulses to the servo motors 3 on the left and right sides, and the servo motors 3 drive the first lead screw 2 to rotate. 3.5 The first lead screw 2 and the limiting block 5 form a threaded transmission pair. Under the guidance and limitation of the guide rod 4, the two limiting blocks 5 are driven to move synchronously towards or away from each other in a straight line along the lateral direction. The guide roller 6 on the inner side of the limiting block 5 rolls into contact with the side of the raw material, pushing the raw material to move synchronously laterally until the laser sensors 11 on both sides detect the raw material. The servo motor 3 stops running and locks the shaft. The two limiting blocks 5 are fixed in the current position, completing the centering and lateral limiting of the raw material.

[0035] This stage achieves fully automatic detection and alignment of raw material position through alignment deviation judgment and adjustment algorithms, eliminating the need for manual adjustment of the limit block spacing and completely solving the problems of low precision and poor efficiency caused by manual adjustment in existing technologies. A single-step closed-loop adjustment mode is adopted, with status feedback after each adjustment to avoid over-adjustment and ensure raw material alignment accuracy. This fundamentally prevents lateral offset and skewing during raw material conveying, ensuring dimensional accuracy and cut quality in laser cutting and improving the finished product qualification rate of the chain. The guide roller 6 uses a rolling contact method, which can both push the raw material laterally to complete alignment and reduce friction with the sides of the raw material during subsequent conveying, preventing scratches on the raw material surface and ensuring smooth conveying.

[0036] Step 4: Continuous Cutting and Guiding Stage 4.1 After the raw material is centered and positioned, the operator connects the front end of the raw material to the external winding device, starts the external winding device, and pulls the raw material forward along the longitudinal direction at a preset uniform speed. 4.2 During the raw material conveying process, the guide rollers 6 inside the two limit blocks 5 continuously roll and contact the left and right sides of the raw material, forming a continuous transverse limit and guide structure, which constrains the transverse displacement of the raw material and ensures that the raw material is always conveyed along the longitudinal central axis. 4.3 Simultaneously start the laser cutting module of the laser cutting machine, and perform fixed-length laser cutting on the continuously conveyed raw materials according to the preset cutting length parameters to complete the automated cutting production of chain materials; 4.4 After the entire roll of raw material is cut, the equipment stops running. The intelligent control system controls the limit block 5 to return to the maximum opening position and the laser sensor 11 to return to the initial reference position, waiting for the next production task.

[0037] This stage, through the continuous guiding structure of limit block 5 and guide roller 6, ensures the centering of the raw material during continuous conveying, avoids deviation and shaking during high-speed conveying, and ensures the dimensional consistency of continuous cutting; the whole process is automated, requiring only operators to complete loading and unloading operations, greatly reducing the intensity of manual labor and improving production efficiency.

[0038] This embodiment 1 is a basic fully automated implementation of the production line. The core is to achieve automatic positioning and cutting of raw materials through switch-type laser detection. The working principle consists of four core links: System initialization phase: After the equipment is powered on, it first completes the self-test of all components and encoder zero-point calibration to eliminate the initial position error of the equipment and the zero-point drift of the sensor; after the operator inputs the specification parameters of the raw material to be processed and the positioning deviation threshold, the control system drives the limit block 5 and the laser sensor 11 back to the initial reference position, completing the reference unification and preparation work before the equipment is run.

[0039] The adaptive adjustment mechanism of the detection component: The control system retrieves the pre-stored raw material specification parameters, calculates the theoretical detection positions on the left and right sides of the raw material based on the theoretical width of the raw material, and then drives the two sets of drive motors 9 to rotate the second lead screw 12 through the mechanical characteristics of the lead screw drive. This, in turn, drives the moving block 10 equipped with laser sensors 11 to move laterally, so that the two laser sensors 11 are accurately positioned to the theoretical positions on the sides of the raw material, thus completing the adaptive adjustment of the detection benchmark to adapt to the detection requirements of raw materials with different width specifications.

[0040] Raw material centering and positioning: After the raw material is fed onto the laser cutting machine table, two laser sensors 11 synchronously detect the position of the side of the raw material. The on / off signals of the sensors are combined to determine the offset direction and state of the raw material. If the raw material is offset, the control system drives the two sets of servo motors 3 on the left and right to rotate the first lead screw 2. Through the lead screw transmission, the two limit blocks 5 move laterally synchronously. The guide rollers 6 on the inner side of the limit block 5 roll and contact the side of the raw material, pushing the raw material to move synchronously to correct its position until both laser sensors 11 detect the raw material. After determining that the raw material is centered, the limit block 5 is locked, completing the automatic centering and lateral limiting of the raw material.

[0041] Continuous cutting and guiding process: After the raw material is positioned, the external winding device pulls the raw material longitudinally at a uniform speed. The guide roller 6 inside the limit block 5 continuously rolls and contacts the side of the raw material, forming a continuous lateral constraint to prevent the raw material from deviating during the conveying process. At the same time, the laser cutting machine performs fixed-length laser cutting on the continuously conveyed raw material according to preset parameters, completing the automated processing of the chain raw material. After the entire roll of raw material is processed, the equipment is reset to the initial state, waiting for the next production task.

[0042] Example 2

[0043] See Figure 6 This embodiment is basically the same as Embodiment 1 in structure and working principle, the difference being that: the various units of the intelligent control system are modularized and refined, and a method for implementing high-precision analog quantity detection is added, as detailed below: The data acquisition unit includes a signal acquisition module, a signal amplification module, an analog-to-digital conversion module, and an A / D conversion module. The input terminal of the signal acquisition module is electrically connected to the analog output terminal of the laser sensor 11, and is used to acquire the analog voltage signal output by the laser sensor 11 corresponding to the distance to the edge of the raw material. The input terminal of the signal amplification module is electrically connected to the output terminal of the signal acquisition module, and is used to linearly amplify the acquired weak analog signal to improve the signal-to-noise ratio. The input terminal of the analog-to-digital conversion module is electrically connected to the output terminal of the signal amplification module, and is used to convert the amplified analog signal into a digital distance value signal and transmit it to the data processing unit.

[0044] The data processing unit includes a storage module, a calculation module, a deviation judgment module, and an instruction output module. The storage module is used to pre-store raw material specifications, equipment mechanical parameters, positioning deviation thresholds, and sensor calibration parameters, and also to store real-time acquired data and operation logs during the production process. The input end of the calculation module is electrically connected to the output end of the analog-to-digital conversion module, and is used to analyze the acquired distance numerical signals to calculate the actual width and actual lateral offset of the raw material. The input end of the deviation judgment module is electrically connected to the output end of the calculation module, and is used to compare the calculated actual offset with the preset deviation threshold to determine whether adjustment is needed, and the direction and amount of adjustment. The input end of the instruction output module is electrically connected to the output end of the deviation judgment module, and is used to generate corresponding control instructions for the servo motor 3 and drive motor 9 based on the judgment result.

[0045] The control execution unit includes a servo drive module, a motor drive module, a communication module, and an alarm output module. The input end of the servo drive module is electrically connected to the command output module, and the output end is electrically connected to the servo motor 3. It is used to convert control commands into drive power signals for the servo motor 3, thereby achieving precise speed, angle, and torque control of the servo motor 3. The input end of the motor drive module is electrically connected to the command output module, and the output end is electrically connected to the drive motor 9. It is used to achieve start-stop, forward / reverse rotation, and positioning control of the drive motor 9. The communication module is used to realize communication and interaction between various units of the intelligent control system, as well as between the intelligent control system and the laser cutting machine and the external unwinding / rewinding device, to achieve multi-device linkage control. The alarm output module is used to output audible and visual alarm signals to the human-machine interface when equipment malfunctions, raw material position exceeds tolerance, or sensors malfunction.

[0046] In this embodiment, the laser sensor 11 is a linear analog output laser displacement sensor, which can output a 0-10V analog voltage signal that is linearly related to the detection distance. The corresponding detection distance range is 0-100mm. The high-precision offset calculation algorithm executed by the calculation module is as follows: Algorithm step U1: Sensor calibration: Pre-store sensor calibration parameters and establish a linear correspondence between voltage value U and detection distance L: L=K×U+B, where K is the calibration slope and B is the calibration intercept. The nonlinear error of the sensor is eliminated through calibration. Algorithm step U2: Real-time distance calculation: The signal acquisition module acquires the output voltage Uleft of the left laser sensor 11 and the output voltage Uright of the right laser sensor 11 in real time, and calculates the actual detection distance Lleft on the left and the actual detection distance Lright on the right through linear relationship; Algorithm step U3: Offset calculation: Based on the preset distance D between the two laser sensors 11, calculate the actual width Wactual of the material = DLleft - Lright, and calculate the lateral offset ΔX of the material = (Lleft - Lright) / 2; when ΔX>0, the material is offset to the right; when ΔX<0, the material is offset to the left; when ΔX=0, the material is in the center position. Algorithm step U4: Adjustment amount calculation: Based on the offset ΔX, calculate the target adjustment amount S=ΔX of the limit block 5, and combine it with the mechanical parameters of the first lead screw 2 to generate a precise control command for the servo motor 3.

[0047] This embodiment achieves precise detection and adjustment of minute offsets in raw materials through modular hardware design and high-precision linear analog detection algorithms, further improving positioning accuracy and cutting quality. The modular design facilitates equipment maintenance, debugging, and functional expansion, while also enabling linkage control with upstream and downstream equipment, adapting to the overall integration requirements of automated production lines.

[0048] This second embodiment is an optimized implementation of high-precision detection. Based on the overall working logic of the first embodiment, the detection and control system is modularized and refined. The core is to achieve higher-precision raw material positioning through linear analog laser detection. The working principle is as follows: This embodiment uses a laser displacement sensor that can output a linear analog signal to replace the switch sensor in embodiment 1. The sensor can output an electrical signal that is linearly related to the detection distance. After the data acquisition unit acquires the analog signal from the sensor, it first amplifies the signal to improve the anti-interference capability, and then converts the analog signal into a digital distance signal through analog-to-digital conversion and transmits it to the data processing unit.

[0049] The data processing unit converts digital signals into the actual detection distance from the sensor to the side of the raw material using pre-stored sensor calibration parameters. It then calculates the actual width and real-time lateral offset of the raw material, compares the actual offset with a preset deviation threshold, determines whether adjustment is needed and the corresponding adjustment direction and amount, and finally generates precise motor control commands.

[0050] The control execution unit independently and precisely controls the servo motor 3 and the drive motor 9 through independent servo drive modules and motor drive modules, respectively. At the same time, it realizes linkage control with the laser cutting machine and upstream and downstream unwinding and rewinding equipment through the communication module. When an abnormality occurs, the alarm module outputs a warning signal.

[0051] This embodiment upgrades the detection of raw material position from a pass / fail determination to a precise measurement of actual distance by using a linear analog quantity detection method. It can identify minute offsets of raw materials and achieve higher precision positioning and adjustment. At the same time, the modular control system design improves the maintainability of the equipment and the overall line integration adaptability.

[0052] Example 3

[0053] See Figure 7 This embodiment is basically the same as Embodiments 1 and 2 in structure and working principle, the difference being that: the production line is equipped with a closed-loop correction unit for the conveying process, which realizes dynamic centering correction during the continuous conveying of raw materials, solving the problem that the gradual offset that occurs during the conveying of raw materials in the prior art cannot be corrected in real time, as detailed below: The closed-loop correction unit includes a real-time feedback module, a dynamic adjustment module, and a deviation correction module. The input of the real-time feedback module is electrically connected to the data acquisition unit and is used to acquire the detection signals of the laser sensors 11 on both sides at a preset sampling frequency during the continuous conveying of raw materials, thereby obtaining the real-time lateral offset of the raw materials. The input of the deviation correction module is electrically connected to the output of the real-time feedback module and is used to compare the real-time offset with a preset dynamic adjustment threshold. When the offset exceeds the dynamic adjustment threshold, a dynamic correction command is generated. The input of the dynamic adjustment module is electrically connected to the output of the deviation correction module, and the output is electrically connected to the control execution unit. It is used to convert the dynamic correction command into a micro-adjustment control signal for the servo motor 3, thereby realizing the dynamic micro-adjustment of the limit block 5 and correcting the lateral offset of the raw materials in real time.

[0054] The closed-loop dynamic correction algorithm in this embodiment runs throughout the continuous raw material conveying process. The specific steps are as follows: Algorithm step V1: Parameter preset: Pre-store the dynamic adjustment threshold ΔX0 in the storage module. ΔX0 is less than the positioning allowable deviation threshold and is used to trigger dynamic fine adjustment; pre-store the sampling frequency f. The sampling frequency f is positively correlated with the raw material conveying speed. The faster the conveying speed, the higher the sampling frequency. Algorithm step V2: Real-time data acquisition: The real-time feedback module synchronously acquires the real-time detection distance of the laser sensors 11 on both sides according to the sampling frequency f, and calculates the real-time lateral offset ΔX of the raw material. Algorithm step V3: Deviation determination: The deviation correction module compares ΔXactual with ΔX0. If |ΔXactual| ≤ ΔX0, the raw material offset is determined to be within the allowable range, and no adjustment is performed; If |ΔXactual|>ΔX0, it is determined that the raw material offset exceeds the dynamic adjustment threshold, and the dynamic correction step is initiated. Algorithm step V4: Dynamic correction calculation: Based on the real-time offset ΔXreal, calculate the fine adjustment amount Smicro = ΔXreal for limit block 5. To avoid oscillations during the adjustment process, a PID control algorithm is used to optimize the fine adjustment amount. Fine-tuning output S(t) = Kp × e(t) + Ki × ∫e(t)dt + Kd × de(t) / dt Where e(t) is the real-time offset at time t, Kp is the proportional coefficient, Ki is the integral coefficient, and Kd is the derivative coefficient. Through PID parameter tuning, smooth regulation without overshoot and oscillation is achieved. Algorithm step V5: Adjustment execution: The dynamic adjustment module converts the optimized micro-adjustment output into control commands for the servo motor 3. The control execution unit drives the servo motor 3 to move the limit block 5 slightly laterally, correcting the lateral offset of the raw material in real time. Algorithm step V6: Loop execution: Repeat steps V2-V5, continuously perform closed-loop dynamic correction throughout the entire raw material conveying and cutting process, until the entire roll of raw material is cut.

[0055] Compared with the existing technology that only performs positioning once during material feeding, the closed-loop correction unit and dynamic correction algorithm in this embodiment have significant innovations and beneficial effects: they can detect and correct the lateral offset of the raw material in real time throughout the continuous material conveying process, completely solving the problem of gradual offset caused by factors such as unwinding tension fluctuations, roller system jumps, and equipment vibrations during the material conveying process, ensuring the dimensional consistency of the entire roll of raw material during the cutting process, and further improving the qualification rate of the finished chain; the micro-adjustment algorithm optimized by PID is used, and the adjustment process is smooth and oscillating, which will not interfere with the continuous conveying of raw materials, adapting to the production requirements of high-speed continuous cutting, and greatly improving the operating speed and production efficiency of the production line.

[0056] This embodiment 3 is a dynamic closed-loop correction implementation method for the conveying process. Based on embodiments 1 and 2, a closed-loop correction unit is added. The core is to realize dynamic centering correction throughout the entire continuous conveying process of raw materials, solving the problem of gradual offset during the conveying process. The working principle is as follows: In this embodiment, during the entire process of continuous raw material conveying, the real-time feedback module of the closed-loop correction unit continuously and synchronously collects the real-time detection data of the laser sensors 11 on both sides according to the preset sampling frequency, and obtains the real-time lateral offset of the raw material during the conveying process; the deviation correction module compares the real-time offset with the preset dynamic adjustment threshold, and generates a dynamic correction command when the offset exceeds the threshold.

[0057] After receiving the correction command, the dynamic adjustment module adopts a smooth adjustment logic without oscillation to convert the correction command into a micro-adjustment control signal for the servo motor 3. The control execution unit drives the servo motor 3 to move the limit block 5 slightly laterally, correcting the lateral offset of the raw material in real time. Throughout the entire conveying and cutting process, this closed-loop correction process is continuously executed until the entire roll of raw material is processed.

[0058] This embodiment differs from the previous two embodiments in that it only completes the positioning once during material feeding. Through a closed-loop control logic of real-time feedback, deviation judgment, and dynamic correction, the position of the raw material is continuously and dynamically corrected throughout the entire material conveying process. This can eliminate the gradual offset caused by factors such as unwinding tension fluctuations, equipment vibration, and roller system jumps during the material conveying process, ensuring the dimensional consistency of the entire roll of raw material during the cutting process. At the same time, it is adapted to the production requirements of high-speed continuous cutting, further improving the processing accuracy and operating efficiency of the production line.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser cutting production line for chain manufacturing, comprising positioning tables (1) installed at the four corners of the top surface of a laser cutting machine, characterized in that: The two front positioning platforms (1) are rotatably connected to a first lead screw (2) on their adjacent surfaces, and the two rear positioning platforms (1) are fixedly connected to a guide rod (4) on their adjacent surfaces. The two first lead screws (2) are threadedly connected to a limit block (5). The other end of the limit block (5) is provided with a sliding hole adapted to the sliding of the guide rod (4), and the inner side of the two limit blocks (5) is provided with a plurality of equidistant rotating grooves. A guide roller (6) is rotatably connected in the rotating groove. The top surface of the two front positioning platforms (1) is equipped with a detection component for detecting the length of different raw materials. It also includes an intelligent control system, which includes a data acquisition unit, a data processing unit, and a control execution unit. The data acquisition unit is electrically connected to the detection component and is used to acquire raw material size signals and position signals. The data processing unit is used to analyze, calculate and generate instructions for the acquired signals. The control execution unit is electrically connected to the first lead screw (2) drive mechanism and the detection component drive mechanism and is used to perform positioning adjustment and detection positioning actions.

2. The laser cutting production line for chain manufacturing according to claim 1, characterized in that: The detection component includes a support platform (7) installed on the top surface of the two positioning platforms (1) at the front end. The support platform (7) has a U-shaped cross-section and a T-shaped groove is opened horizontally through the bottom surface of the support platform (7). A baffle (8) is installed vertically in the middle of the bottom surface of the support platform (7).

3. A laser cutting production line for chain manufacturing according to claim 2, characterized in that: The inner walls of the support platform (7) are rotatably connected to both sides of the baffle (8). The distal ends of the two second screws (12) penetrate the support platform (7), and the distal ends of the two second screws (12) are connected to a drive motor (9) installed on the outer wall of the support platform (7) through a coupling.

4. A laser cutting production line for chain manufacturing according to claim 3, characterized in that: The second lead screw (12) is threadedly connected to a movable block (10) adapted to a T-shaped groove. The bottom surface of the movable block (10) is provided with a detection groove, and a laser sensor (11) is installed in the detection groove.

5. A laser cutting production line for chain manufacturing according to claim 1, characterized in that: The distal ends of the two first lead screws (2) pass through the corresponding positioning table (1), and the distal ends of the two first lead screws (2) are connected to a servo motor (3) installed on the outside of the positioning table (1) via a coupling.

6. A laser cutting production line for chain manufacturing according to claim 1, characterized in that: The data acquisition unit includes a signal acquisition module and a signal conversion module. The signal acquisition module is electrically connected to the laser sensor (11) and is used to acquire the edge position signal of the raw material. The signal conversion module is used to convert the analog signal into a digital signal and transmit it to the data processing unit.

7. A laser cutting production line for chain manufacturing according to claim 1, characterized in that: The data processing unit includes a storage module, a calculation module, and an instruction output module. The storage module is used to pre-store raw material specification parameters and positioning thresholds. The calculation module is used to compare and calculate the acquired signals with the pre-stored parameters. The instruction output module is used to generate positioning adjustment instructions and detection positioning instructions.

8. A laser cutting production line for chain manufacturing according to claim 1, characterized in that: The control execution unit includes a servo drive module and a motor drive module. The servo drive module is electrically connected to the servo motor (3) and is used to drive the first lead screw (2) to move the limit block (5). The motor drive module is electrically connected to the drive motor (9) and is used to drive the second lead screw (12) to move the moving block (10).

9. A laser cutting production line for chain manufacturing according to claim 1, characterized in that: The inner side of the limiting block (5) is provided with a rolling guide structure. The rolling guide structure and the guide roller (6) cooperate to form a continuous guide surface, which is used to reduce the frictional resistance of raw material conveying and constrain the lateral displacement of raw material.

10. A laser cutting production line for chain manufacturing according to claim 1, characterized in that: The production line is equipped with a closed-loop correction unit, which is used to acquire the feedback signal from the laser sensor (11) in real time, dynamically correct the position of the limit block (5), and maintain the alignment of the raw material conveying.

Images