A double-beam laser cutting and scribing marking system, method, terminal and medium

Abstract

The application belongs to the technical field of laser cutting, scribing and marking, and particularly discloses a double-cross-beam laser cutting, scribing and marking system, method, terminal and medium. The system comprises a machine tool main body, a first cross beam and a second cross beam arranged in sequence. The first cross beam is provided with a laser cutting head assembly, and the second cross beam is provided with a Z-axis driving mechanism and a scribing assembly. A Hall pressure sensor is fixed in a sealed cavity of the scribing assembly, and a scribing needle is connected to a pressure detection end of the Hall pressure sensor. The control method of the application extracts a calibration reference pressure value of a scribing depth in advance, collects a current force value in real time when the second cross beam performs scribing, and compares the two values, and then drives the Z-axis to move up and down in real time by using a dynamic compensation algorithm. The application realizes efficient integration of the marking and cutting processes, solves the problem that the mark is easily covered by a coating by using physical scribing, and effectively overcomes the problems of plate collision and uneven depth caused by the bending deformation of a large plate by using force feedback closed-loop servo.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting, scribing and marking technology, specifically relating to a dual-beam laser cutting, scribing and marking system, method, terminal and medium. Background Technology

[0002] In the fields of metal processing and machinery manufacturing, laser cutting has become a core process for workpiece forming due to its high precision and efficiency. To meet the needs of product lifecycle traceability, production management, and subsequent assembly, it is usually necessary to mark the workpiece before and after the cutting process to carry key identification information such as product model, production batch, and specifications.

[0003] Currently, the mainstream marking methods for cut workpieces in the industry mainly include laser surface marking, powder spraying scribing, and traditional mechanical scribing. Existing mechanical scribing equipment mostly adopts a two-dimensional planar control scheme, that is, after controlling the scribing blade to move laterally and longitudinally to a specific position, the scribing needle is driven by a cylinder to pop out, and the scribing mark is made by mechanical contact between the scribing needle and the surface of the material.

[0004] However, the aforementioned existing technologies have two significant drawbacks in practical applications. First, the marks left by conventional marking or scribing are relatively shallow. When the workpiece requires subsequent coating treatments such as galvanizing or spraying, the new coating can easily completely cover the previous marks, leading to the loss of crucial traceability information. Second, large plates generally experience some degree of bending deformation during processing. Existing two-dimensional planar scribing equipment cannot guarantee a uniform scribing depth across the entire plate. When encountering deformed protrusions on the plate, it is also prone to technical problems such as the scribing needle hitting the plate, dragging the entire plate, or even causing damage to the plate. Summary of the Invention

[0005] This invention addresses the problems in the prior art by providing a dual-beam laser cutting, scribing, and marking system, method, terminal, and medium. It solves the problem that conventional marking or scribing methods often produce shallow marks, leading to the loss of crucial traceability information when subsequent coating processes such as galvanizing or spraying are applied to the workpiece. Furthermore, it resolves the technical issues of existing two-dimensional planar scribing equipment, which cannot guarantee uniform scribing depth across the entire plate and is prone to causing the scribing needle to collide with the plate, drag the entire plate, or even damage it when encountering deformed or protruding parts of the plate.

[0006] The technical solution adopted in this invention is as follows: In a first aspect, this application provides a dual-beam laser cutting, scribing, and marking system, comprising: Includes a machine tool body, a first crossbeam and a second crossbeam disposed on the machine tool body; The second crossbeam is located in front of the first crossbeam; A laser cutting head assembly is mounted on the first crossbeam; A Z-axis drive mechanism extending and moving along the Z-axis direction is installed on the second crossbeam, and a scribing component is installed on the slide plate of the Z-axis drive mechanism. The scribing assembly includes a sealed cavity, a Hall pressure sensor, and a scribing needle. The Hall pressure sensor is fixedly installed in the sealed cavity, and the scribing needle is fixedly connected to the pressure detection end of the Hall pressure sensor.

[0007] Furthermore, the scribing assembly also includes a cylinder and a first solenoid valve; The output end of the first solenoid valve is connected to the control end of the cylinder, and the power output end of the cylinder is connected to the sealed cavity. A sealing ring is sandwiched between the Hall pressure sensor and the inner wall of the sealed cavity; The tail end of the engraving needle is provided with an external thread, and the engraving needle is connected to the pressure detection end of the Hall pressure sensor through the external thread.

[0008] Furthermore, a nozzle assembly is also installed on the slide plate of the Z-axis drive mechanism, and the nozzle assembly is located on one side of the engraving assembly; The nozzle assembly includes a capacitive sensor, upper and lower adjusting nuts, and a scale panel; The top of the nozzle assembly is threadedly connected to the upper and lower adjusting nuts, and the scale panel is disposed on the side surface of the nozzle assembly; When the scribe line is in its retracted upper limit state, the bottom of the nozzle assembly is at a lower horizontal height than the bottom of the scribe line.

[0009] Furthermore, a pressure plate assembly and a second solenoid valve are also installed on the slide plate of the Z-axis drive mechanism; The pressure plate assemblies are respectively disposed on both sides of the engraving assembly; The output end of the second solenoid valve is connected to the pressure plate assembly, and the vertical position of the pressure plate assembly can be adjusted by sliding along the Z-axis.

[0010] Secondly, this application provides a dual-beam laser cutting, scribing, and marking method, using the dual-beam laser cutting, scribing, and marking system as described in the first aspect. The method includes the following steps: The control system acquires the preset calibration reference pressure value. ; During the displacement and marking actions of the second crossbeam and the marking assembly, the current pressure value of the Hall pressure sensor is collected in real time. ; Calculate the current pressure value Compared with the calibration reference pressure value pressure difference ,in ; when At that time, an upward control signal is issued to drive the Z-axis drive mechanism to move the engraving assembly upward; when At that time, a downward control signal is issued to drive the Z-axis drive mechanism to move the engraving assembly downward; when At that time, a holding signal is sent to drive the Z-axis drive mechanism to maintain the current Z-axis height; in, The preset allowable threshold for pressure difference within the system.

[0011] Furthermore, the process of obtaining a preset calibration reference pressure value... The steps include: The needle is controlled to be in a retracted state, and the Z-axis drive mechanism is driven to move the nozzle assembly downwards. When the bottom end of the nozzle assembly contacts the workpiece surface, the current Z-axis position coordinate is recorded as the zero coordinate, and the Z-axis drive mechanism is controlled to move upward. Control the scriber to be in the maximum feed extension state and clear the pressure feedback value of the Hall pressure sensor to zero; Control the Z-axis drive mechanism to move slowly downwards. At the initial moment when the pressure feedback value of the Hall pressure sensor changes, record the corresponding Z-axis position coordinates as the initial contact coordinates. ; Obtain the set engraving depth data input from within the system. The Z-axis drive mechanism is controlled to continue moving downwards until the Z-axis coordinate is... Location; Record the pressure feedback value of the Hall pressure sensor at the Z-axis coordinate position, and store this value as the calibration reference pressure value. .

[0012] Furthermore, in the step of issuing the upward or downward control signal, the compensation speed of the Z-axis is calculated using a dynamic prediction compensation model based on the pressure change rate. :

[0013] in, This is the proportional gain coefficient. The differential gain coefficient, This represents the rate of change of the current pressure error. This represents the current composite velocity of the beam in the XY plane. The estimated local slope of the workpiece surface is obtained using the formula... Calculated within the previous sampling period; in This represents the actual speed of movement along the Z-axis. This is the feedforward gain factor; The , as well as The process parameter is obtained by the control system matching and calling it from the process parameter database based on the current workpiece material properties before the engraving action is executed. The control system is based on the calculated... Servo commands for real-time adjustment of the Z-axis drive mechanism.

[0014] Furthermore, the control method also includes the timing of the dual crossbeam movements: According to the marking trajectory data of the input drawing, control the movement of the second crossbeam and control the cylinder to extend the marking needle to perform the marking action; After the second crossbeam completes the engraving action, the first crossbeam is controlled to move to the engraved plate area according to the cutting trajectory data of the input drawing, and the laser cutting head assembly is activated to perform the laser cutting action.

[0015] Thirdly, this application provides a terminal, including: The memory is used to store the laser cutting, scribing, and marking program for the double beam laser. The processor is used to implement the steps of the dual-beam laser cutting, scribing, and marking method as described in the second aspect when executing the dual-beam laser cutting, scribing, and marking program.

[0016] Fourthly, this application provides a computer-readable storage medium that stores computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes the dual-beam laser cutting and marking method as described in the second aspect.

[0017] As can be seen from the above technical solutions, the advantages of the present invention are: By setting up a double crossbeam structure and integrating the scribing assembly, which includes a sealed cavity and a Hall pressure sensor, onto the Z-axis drive mechanism, direct physical monitoring of the force on the end of the scribing needle during the scribing process is achieved, overcoming the technical defect that traditional two-dimensional planar marking cannot adapt to the bending deformation of the sheet material.

[0018] By using a cylinder combined with a sealed cavity and a sealing ring as the feed power structure, and using external threads to fix the needle to the pressure detection end, the feed pressure can be stably transmitted to the sensing end, ensuring the detection accuracy of the sensor under complex working conditions and the convenient installation and removal of consumable needles.

[0019] By adding a nozzle assembly consisting of a height adjustment nut and a scale panel next to the scribing assembly, and limiting the nozzle bottom to a lower horizontal position when the scribing needle retracts, the absolute zero position of the workpiece surface can be detected non-contactly using a capacitive sensor, providing a coordinate reference for subsequent depth calibration.

[0020] By configuring pressure plate assemblies on both sides of the scribing assembly, which are controlled by independent solenoid valves and have adjustable vertical height, local physical pressure can be provided in easily deformable areas such as blade gaps or plate edges, effectively preventing local dents or edge warping deformation of the plate when it is scribing under pressure.

[0021] By calculating the difference between the current pressure value and the calibrated reference pressure value in real time, and combining the preset pressure difference allowable threshold, the system sends up-down displacement compensation or holding signals to the Z-axis, realizing closed-loop force feedback control of the marking depth, enabling the marking needle to automatically follow the undulating features of the workpiece surface.

[0022] By sequentially executing the steps of nozzle probing to zero, the needle slowly touching the plate to record the initial contact coordinates, and sinking based on the target marking depth and recording the pressure value, the geometric depth data required by the process is converted into the physical feedback reference value required by the control system, thereby improving the accuracy of the servo calibration.

[0023] By introducing a dynamic prediction and compensation formula that includes parameters such as pressure change rate, local slope prediction, and horizontal movement speed, and combining it with a process parameter database to automatically match the gain coefficient based on the material, the surface deformation trend can be predicted in advance and the speed feedforward can be output, reducing the mechanical servo lag phenomenon in the dynamic scribing process.

[0024] By setting a control sequence in which the second crossbeam on the front side first engraves and marks the markings, and the first crossbeam on the rear side follows into the marked area to perform cutting and unloading, the cutting and marking processes are integrated. This not only avoids the subsequent coating process from covering the surface markings, but also saves the process losses of secondary loading and positioning between different devices. Attached Figure Description

[0025] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the dual-beam laser cutting, scribing, and marking system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the Z-axis drive mechanism according to an embodiment of the present invention; Figure 3This is a schematic diagram of the Z-axis drive mechanism and the working plate during operation according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the scribing component according to an embodiment of the present invention; Figure 5 This is a flowchart of a double-beam laser cutting, scribing, and marking method according to an embodiment of the present invention.

[0027] In the figure: 1. Machine tool body; 2. First crossbeam; 3. Second crossbeam; 31. Z-axis drive mechanism; 4. Grading assembly; 41. Sealed cavity; 42. Hall pressure sensor; 43. Grading needle; 44. Sealing ring; 5. Nozzle assembly; 51. Upper and lower adjusting nuts; 52. Scale panel; 6. Pressure plate assembly. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-4 As shown, this application provides a dual-beam laser cutting, scribing, and marking system, comprising: It includes a machine tool body 1, a first crossbeam 2 and a second crossbeam 3 disposed on the machine tool body 1; The second crossbeam 3 is located in front of the first crossbeam 2; A laser cutting head assembly is installed on the first crossbeam 2; The second crossbeam 3 is equipped with a Z-axis drive mechanism 31 that extends and moves along the Z-axis direction, and a scribing component 4 is installed on the slide plate of the Z-axis drive mechanism 31. The engraving assembly 4 includes a sealed cavity 41, a Hall pressure sensor 42, and an engraving needle 43; The Hall pressure sensor 42 is fixedly installed inside the sealed cavity 41, and the graduated needle 43 is fixedly connected to the pressure detection end of the Hall pressure sensor 42.

[0030] Based on this, the machine tool body 1 in this embodiment provides a stable foundation support for the entire system, and the first crossbeam 2 and the second crossbeam 3 slide independently or in conjunction along the guide rails on the machine tool body 1.

[0031] During operation, the sheet metal is laid flat within the processing area of ​​the machine tool body 1. The second crossbeam 3, located at the front, moves first to the target area, and the slide plate is driven downwards by the Z-axis drive mechanism 31. During the marking process, the marking needle 43 directly contacts the surface of the metal sheet and generates physical interference. At this time, the reaction force generated by the sheet metal on the marking needle 43 is transmitted to the Hall pressure sensor 42. The sensor converts this mechanical force into an electrical signal in real time and transmits it to the control system, allowing the system to perceive the current force data of the marking needle 43.

[0032] In a specific implementation scenario, when processing a large carbon steel plate, the system first controls the scribing component 4 on the second crossbeam 3 to scribble deep grooves for the product batch number on the plate surface. Then, the first crossbeam 2 moves over and the laser cutting head component completes the contour cutting around the marked area according to the drawing. The whole process is coordinated and can complete the blanking of the workpiece with deep markings without the need for manual secondary handling or re-alignment.

[0033] In some embodiments, the scribing assembly 4 further includes a cylinder and a first solenoid valve; The output end of the first solenoid valve is connected to the control end of the cylinder, and the power output end of the cylinder is connected to the sealed cavity 41. A sealing ring 44 is sandwiched between the Hall pressure sensor 42 and the inner wall of the sealed cavity 41. The tail end of the scribe needle 43 is provided with an external thread, and the scribe needle 43 is connected to the pressure detection end of the Hall pressure sensor 42 through the external thread. With this structure, the cylinder serves as the power source for the scribe feed, and the extension or retraction of the scribe needle 43 is controlled by the system through the first solenoid valve. The sealed cavity 41 provides the sensor with a stable internal environment free from external industrial dust and oil contamination, and the sealing ring 44 further ensures the sealing of this environment. The design of the external thread enhances the coaxiality and rigidity of the connection between the scribe needle 43 and the pressure sensor.

[0034] During long-term, high-intensity marking processes, the diamond-material marking needle 43 may experience physical wear, causing its tip to become blunt. In this case, on-site maintenance personnel do not need to disassemble the precision sensor inside the entire marking assembly 4. They can simply use a conventional tool to unscrew the external thread at the end of the marking needle 43 to remove it. Then, a new marking needle 43 can be screwed into the bottom of the sensor and locked in place, allowing for rapid resumption of production and reducing equipment downtime and maintenance costs.

[0035] In some embodiments, a nozzle assembly 5 is also mounted on the slide plate of the Z-axis drive mechanism 31, and the nozzle assembly 5 is located on one side of the engraving assembly 4; The nozzle assembly 5 includes a capacitive sensor, an up and down adjusting nut 51, and a scale panel 52; The top of the nozzle assembly 5 is threadedly connected to the upper and lower adjusting nuts 51, and the scale panel 52 is disposed on the side surface of the nozzle assembly 5; When the etched needle 43 is in its retracted upper limit state, the bottom horizontal height of the nozzle assembly 5 is lower than the bottom horizontal height of the etched needle 43.

[0036] With the above setup, the nozzle assembly 5 primarily undertakes the tasks of calibrating the marking depth and finding the reference zero plane in the system. The scale panel 52 provides the operator with an intuitive visual reference, allowing each mechanical adjustment of the nozzle height to be quantified and recorded.

[0037] Setting the bottom height of the nozzle assembly 5 to be lower than the bottom of the scribe 43 in its retracted state ensures safe equipment calibration. In the actual calibration operation embodiment, the system control cylinder keeps the scribe 43 stationary at its upper retracted position, and then the Z-axis drive mechanism 31 slowly moves the slide downwards. Because the bottom of the nozzle assembly 5 is lower, its internal capacitive sensor will sense the workpiece surface and contact the plate first. At this time, the system immediately records this position as the absolute zero coordinate of the Z-axis. During this process, since the scribe 43 is concealed at a higher position, the risk of the hard tip of the scribe 43 scratching the surface of the plate is eliminated, ensuring the safety of the calibration operation. After finding the zero position, the operator can fine-tune the relative height distance between the nozzle assembly 5 and the scribe 43 by rotating the up and down adjusting nut 51 and combining it with the reading of the scale panel 52, to adapt to the sensing and calibration requirements of different thicknesses or special working conditions.

[0038] In some embodiments, a pressure plate assembly 6 and a second solenoid valve are also installed on the slide plate of the Z-axis drive mechanism 31; The pressure plate assembly 6 is respectively disposed on both sides of the engraving assembly 4; The output end of the second solenoid valve is connected to the pressure plate assembly 6, and the vertical position of the pressure plate assembly 6 can be adjusted by sliding along the Z-axis.

[0039] On the bed of a conventional laser cutting machine, the sheet metal is usually supported by support blades with a certain spacing. When the marking position is exactly above the blade gap or in the suspended area such as the edge of the sheet metal, the marking needle 43 is prone to causing the sheet metal to sink downward or the edge to lift up, resulting in distorted marking depth or even blade jamming.

[0040] The pressure plate assemblies 6, which are set on both sides of the engraving assembly 4, can be independently controlled by the second solenoid valve to provide local pre-clamping force before the engraving knife contacts the plate.

[0041] In a typical edge marking embodiment, the thin metal sheet to be processed is laid flat on the machine tool. When the second crossbeam 3 moves to the edge of the metal sheet to prepare for marking, the system first issues a command to open the second solenoid valve. The pressure plate assemblies 6 distributed on both sides of the marking point quickly descend and flatten the sheet material area around the marking needle 43. Since the height of the pressure plate assembly 6 can be adjusted by sliding along the Z-axis, it can conform to the thickness of the sheet material according to the set parameters and provide appropriate pressure.

[0042] Please see Figure 5 As shown, this application provides a dual-beam laser cutting, scribing, and marking method. Using the aforementioned dual-beam laser cutting, scribing, and marking system, the method includes the following steps: Step S1: The control system acquires the preset calibration reference pressure value. ; In this step, the reference pressure value is calibrated. This is the physical reaction force experienced by the engraving tool when it reaches the ideal scratch depth on the workpiece surface. This value is the target set point for force comparison during the dynamic engraving process.

[0043] In a specific embodiment, if the current processing task requires leaving a traceability code mark with a depth of 0.2mm on a 3mm thick carbon steel plate, the system will physically detect the resistance value corresponding to this 0.2mm depth through a specific program before the actual marking, and use it as... It is stored in the controller's register as a reference for subsequent closed-loop regulation.

[0044] Step S2: During the displacement and marking actions of the second crossbeam and the marking assembly, the current pressure value of the Hall pressure sensor is collected in real time. ; When the engraving component moves with the crossbeam in the XY plane to perform high-speed text or graphic trajectory interpolation, the analog-to-digital conversion module at the bottom of the system reads the voltage change of the Hall pressure sensor at a set high-frequency sampling rate.

[0045] In one specific embodiment, the PLC module of the control system acquires the force data of the graduated needle at a frequency of 1000Hz. When the etch needle passes through the natural bending area of ​​the board caused by thermal stress or gravity, the stress data will show a continuous waveform change with the undulation of the board, thus providing a high-density data source for subsequent PID compensation.

[0046] Step S3: Calculate the current pressure value. Compared with the calibration reference pressure value pressure difference ,in ; when At that time, an upward control signal is issued to drive the Z-axis drive mechanism to move the engraving assembly upward; when At that time, a downward control signal is issued to drive the Z-axis drive mechanism to move the engraving assembly downward; when At that time, a holding signal is sent to drive the Z-axis drive mechanism to maintain the current Z-axis height; in, The preset allowable threshold for pressure difference within the system.

[0047] In some embodiments, the step of obtaining a preset calibration reference pressure value The steps include: The needle is controlled to be in a retracted state, and the Z-axis drive mechanism is driven to move the nozzle assembly downwards. When the bottom end of the nozzle assembly contacts the workpiece surface, the current Z-axis position coordinate is recorded as the zero coordinate, and the Z-axis drive mechanism is controlled to move upward. Control the scriber to be in the maximum feed extension state and clear the pressure feedback value of the Hall pressure sensor to zero; Control the Z-axis drive mechanism to move slowly downwards. At the initial moment when the pressure feedback value of the Hall pressure sensor changes, record the corresponding Z-axis position coordinates as the initial contact coordinates. ; Obtain the set engraving depth data input from within the system. The Z-axis drive mechanism is controlled to continue moving downwards until the Z-axis coordinate is... Location; Record the pressure feedback value of the Hall pressure sensor at the Z-axis coordinate position, and store this value as the calibration reference pressure value. .

[0048] In some embodiments, in the step of issuing the upward or downward control signal, the compensation speed of the Z-axis is calculated using a dynamic predictive compensation model based on the pressure change rate. :

[0049] In this computing architecture, the final compensation speed output to the servo driver is It is composed of the superposition of three independent calculation results: proportional term, differential term, and feedforward term.

[0050] In a specific code operation embodiment, the controller performs the floating-point operation in each interpolation cycle. The first term is responsible for handling the current absolute error, the second term is responsible for sensing the rate of error change and providing damping, and the third term, independent of force feedback, performs predictive lifting or pressing based on the geometric terrain and travel speed. The three terms are combined to output the Z-axis speed planning command.

[0051] in, This is the proportional gain coefficient. The differential gain coefficient, This represents the rate of change of the current pressure error. This represents the current composite velocity of the beam in the XY plane. The estimated local slope of the workpiece surface is obtained using the formula... Calculated within the previous sampling period; in This represents the actual speed of movement along the Z-axis. This is the feedforward gain factor; The , as well as The process parameter is obtained by the control system matching and calling it from the process parameter database based on the current workpiece material properties before the engraving action is executed. Because different metals (such as soft aluminum and hard stainless steel) have drastically different deformation resistance and mechanical response characteristics, the same set of gain coefficients cannot be adapted to all materials.

[0052] In a typical production implementation, the system integrates a process database comprised of a large amount of experimental data. The operator simply selects the workpiece material from the drop-down menu in the software interface, and a set of gain coefficients is retrieved from the database and entered into the formula, thus preventing setup failures caused by operators' lack of understanding of control theory.

[0053] The control system is based on the calculated... Servo commands for real-time adjustment of the Z-axis drive mechanism.

[0054] In some embodiments, the control method further includes a dual-beam action timing sequence: In a whole-board cutting embodiment of a large layout template, the layout software may contain marking and cutting paths for hundreds of parts. The control system will activate this action timing allocation mechanism to decompose the original planar DXF drawing layer, strip the marking layer to the second crossbeam on the front side for execution, strip the outline tangent layer to the first crossbeam on the rear side for execution, and monitor the physical distance between the two to prevent collision.

[0055] According to the marking trajectory data of the input drawing, control the movement of the second crossbeam and control the cylinder to extend the marking needle to perform the marking action; In a specific production embodiment, the system first activates the X / Y axis servo motors on the second crossbeam to move to the starting coordinate point of the target part. Then, it issues a command to open the solenoid valve to control the cylinder to use the diamond engraving needle. With the support of the aforementioned PID servo algorithm and feedforward model, the engraving component moves across the curved metal plate surface, marking product numbers such as "SN-2026-001" and traceability QR code patterns. The engraving depth is uniform and resistant to coating coverage.

[0056] After the second crossbeam completes the engraving action, the first crossbeam is controlled to move to the engraved plate area according to the cutting trajectory data of the input drawing, and the laser cutting head assembly is activated to perform the laser cutting action.

[0057] In a typical embodiment, once the system confirms that the second crossbeam has completed marking all parts in the area and moved to the safe waiting area, the first crossbeam quickly slides to the previously marked position. The laser generator emits light, and the cutting head performs high-power penetration cutting along the predetermined outer contour of the part. The final workpiece not only has the preset geometric shape, but its surface also has markings, and the entire process is completed in one step.

[0058] In some embodiments, this application provides a terminal, including: The memory is used to store the laser cutting, scribing, and marking program for the double beam laser. A processor is used to execute the steps of the dual-beam laser cutting, scribing, and marking system to implement the dual-beam laser cutting, scribing, and marking method.

[0059] In some embodiments, this application provides a computer-readable storage medium that stores computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes the described dual-beam laser cutting and marking method.

[0060] The above description is merely a preferred embodiment of one or more embodiments of this specification and is not intended to limit the scope of one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the protection scope of one or more embodiments of this specification.

Claims

1. A dual-beam laser cutting, scribing, and marking system, characterized in that, include: It includes a machine tool body (1), a first crossbeam (2) and a second crossbeam (3) disposed on the machine tool body (1); The second crossbeam (3) is located in front of the first crossbeam (2); A laser cutting head assembly is mounted on the first crossbeam (2); The second crossbeam (3) is equipped with a Z-axis drive mechanism (31) that extends and moves along the Z-axis direction, and a scribing component (4) is installed on the slide plate of the Z-axis drive mechanism (31). The scribing assembly (4) includes a sealed cavity (41), a Hall pressure sensor (42), and a scribing needle (43). The Hall pressure sensor (42) is fixedly installed inside the sealed cavity (41), and the scribing needle (43) is fixedly connected to the pressure detection end of the Hall pressure sensor (42). The engraving assembly (4) also includes a cylinder and a first solenoid valve; The output end of the first solenoid valve is connected to the control end of the cylinder, and the power output end of the cylinder is connected to the sealed cavity (41). A sealing ring (44) is sandwiched between the Hall pressure sensor (42) and the inner wall of the sealed cavity (41). The tail end of the engraving needle (43) is provided with an external thread, and the engraving needle (43) is connected to the pressure detection end of the Hall pressure sensor (42) through the external thread; A nozzle assembly (5) is also installed on the slide plate of the Z-axis drive mechanism (31), and the nozzle assembly (5) is located on one side of the engraving assembly (4); The nozzle assembly (5) includes a capacitive sensor, an up and down adjusting nut (51), and a scale panel (52). The top of the nozzle assembly (5) is threadedly connected to the upper and lower adjusting nuts (51), and the scale panel (52) is disposed on the side surface of the nozzle assembly (5). When the etched needle (43) is in the upper limit of retraction, the bottom horizontal height of the nozzle assembly (5) is lower than the bottom horizontal height of the etched needle (43).

2. The dual-beam laser cutting, scribing, and marking system according to claim 1, characterized in that, The Z-axis drive mechanism (31) also has a pressure plate assembly (6) and a second solenoid valve installed on its slide plate; The pressure plate assembly (6) is respectively disposed on both sides of the scribing assembly (4); The output end of the second solenoid valve is connected to the pressure plate assembly (6), and the vertical position of the pressure plate assembly (6) can be adjusted by sliding along the Z-axis.

3. A method for laser cutting, scribing, and marking with a dual-beam laser, using the dual-beam laser cutting, scribing, and marking system as described in claim 1 or 2, characterized in that... Includes the following steps: The control system acquires the preset calibration reference pressure value. ; During the displacement and marking actions of the second crossbeam and the marking assembly, the current pressure value of the Hall pressure sensor is collected in real time. ; Calculate the current pressure value Compared with the calibration reference pressure value pressure difference ,in ; when At that time, an upward control signal is issued to drive the Z-axis drive mechanism to move the engraving assembly upward; when At that time, a downward control signal is issued to drive the Z-axis drive mechanism to move the engraving assembly downward; when At that time, a holding signal is sent to drive the Z-axis drive mechanism to maintain the current Z-axis height; in, The preset allowable threshold for pressure difference within the system.

4. The double-beam laser cutting, scribing, and marking method according to claim 3, characterized in that, The preset calibration reference pressure value is obtained. The steps include: The needle is controlled to be in a retracted state, and the Z-axis drive mechanism is driven to move the nozzle assembly downwards. When the bottom end of the nozzle assembly contacts the workpiece surface, the current Z-axis position coordinate is recorded as the zero coordinate, and the Z-axis drive mechanism is controlled to move upward. Control the scriber to be in the maximum feed extension state and clear the pressure feedback value of the Hall pressure sensor to zero; Control the Z-axis drive mechanism to move slowly downwards. At the initial moment when the pressure feedback value of the Hall pressure sensor changes, record the corresponding Z-axis position coordinates as the initial contact coordinates. ; Obtain the set engraving depth data input from within the system. The Z-axis drive mechanism is controlled to continue moving downwards until the Z-axis coordinate is... Location; Record the pressure feedback value of the Hall pressure sensor at the Z-axis coordinate position, and store this value as the calibration reference pressure value. .

5. The double-beam laser cutting, scribing, and marking method according to claim 3, characterized in that, In the step of issuing the upward or downward control signal, the compensation speed of the Z-axis is calculated using a dynamic prediction compensation model based on the pressure change rate. : in, This is the proportional gain coefficient. The differential gain coefficient, This represents the rate of change of the current pressure error; This represents the current composite velocity of the beam in the XY plane. The estimated local slope of the workpiece surface is obtained using the formula... Calculated within the previous sampling period; in This represents the actual speed of movement along the Z-axis. This is the feedforward gain factor; The , as well as The process parameter is obtained by the control system matching and calling it from the process parameter database based on the current workpiece material properties before the engraving action is executed. The control system is based on the calculated... Servo commands for real-time adjustment of the Z-axis drive mechanism.

6. The double-beam laser cutting, scribing, and marking method according to claim 3, characterized in that, The control method also includes the timing sequence of the double crossbeam action: According to the marking trajectory data of the input drawing, control the movement of the second crossbeam and control the cylinder to extend the marking needle to perform the marking action; After the second crossbeam completes the engraving action, the first crossbeam is controlled to move to the engraved plate area according to the cutting trajectory data of the input drawing, and the laser cutting head assembly is activated to perform the laser cutting action.

7. A terminal, characterized in that, include: The memory is used to store the laser cutting, scribing, and marking program for the dual-beam laser. The processor is used to execute the steps of the dual-beam laser cutting, scribing and marking method as described in any one of claims 3-6 when executing the dual-beam laser cutting, scribing and marking device.

8. A computer-readable storage medium, characterized in that, The storage medium stores computer instructions. When the computer reads the computer instructions in the storage medium, the computer executes the double-beam laser cutting and marking method as described in any one of claims 3-6.

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