Laser calibration method for laser processing apparatus and laser processing apparatus

Abstract

The embodiment of the invention discloses a laser calibration method of a laser processing device and the laser processing device.According to the method, the actual laser spot position is changed through deflection of an electromagnetic galvanometer mechanism, operation on a displayer and electric control over the actual laser spot position are achieved, the actual laser spot position coincides with the target laser spot position, and the target laser spot position is calibrated. Therefore, calibration is completed. Compared with the prior art of manual adjustment, calibration precision is higher, an operation threshold is lowered (in the prior art, professional personnel are generally needed for calibration, and a pollution-free environment is needed for dismounting the shell), calibration efficiency is higher, and the situation that the galvanometer motor structure is damaged and needs to be wholly replaced due to manual calibration and screw screwing can be avoided. In addition, as the shell does not need to be disassembled and manual adjustment does not need to be carried out, the situation that precise optical elements in the laser processing device are polluted is avoided.

Description

Technical Field

[0001] This invention relates to the field of laser processing technology, and in particular to a laser calibration method and a laser processing apparatus. Background Technology

[0002] Laser processing technologies, such as laser cutting, welding, and marking, are widely used in industrial manufacturing due to their high precision, high efficiency, and non-contact processing characteristics. In these applications, the laser beam needs to be precisely deflected by a galvanometer motor to complete the processing at a specified position on the work surface. The core of the galvanometer motor is a one-dimensional galvanometer motor, which changes the laser beam path by driving a reflector to deflect. However, after long-term operation, mechanical vibration, or changes in ambient temperature, the optical path may shift, causing a deviation between the actual laser spot position and the target position, severely affecting processing accuracy and quality. Therefore, regular or pre-use precise calibration of the laser beam is crucial.

[0003] Current calibration procedures typically require the introduction of red light coaxial with the processing laser as an indicator light. Operators visually observe the position of the red light spot on the target or workpiece to determine its deviation from a preset target point (such as the center of the crosshairs on a positioning target plate, also called the target laser spot position). When a positional deviation occurs, the outer casing of the welding torch head must be disassembled to expose the adjusting screws of the galvanometer motor structure. Subsequently, technicians manually adjust the adjusting screws of the galvanometer motor structure to change the position of the reflectors on the galvanometer motor structure (e.g., pitch and yaw angles), causing the red light spot output after reflection to move to the target position, thus achieving calibration. This process requires disassembling the casing and manual adjustment, which is cumbersome and time-consuming, and often requires repeated adjustments, further reducing efficiency.

[0004] Because it relies entirely on manual operation and subjective judgment, a single calibration is time-consuming, typically taking several minutes or even longer, making it difficult to meet the production line's requirements for Overall Equipment Effectiveness (OEE). In mass production scenarios such as laser welding and precision packaging, equipment needs to undergo frequent periodic calibrations to ensure accuracy. This time-consuming calibration method directly impacts overall production efficiency. More importantly, different technicians have different operating habits and judgment standards, making it difficult for even the same person to guarantee completely consistent calibration results in different operations. This leads to unstable equipment status and makes it difficult to ensure the consistency of processed products.

[0005] Repeatedly disassembling and reassembling the housing and manually adjusting the position of the galvanometer motor structure using screws is another significant drawback of the existing calibration process. This adjustment method is inefficient and inevitably leads to a gradual increase in the clearance of the mechanical connection parts (e.g., stripped screws, worn locating pins, and slight deformation of the mounting surface). This slight damage and deformation of the mechanical structure caused by disassembly and reassembly has a cumulative effect, which in the long run will become an important factor leading to the slow deterioration of the red indicator laser (i.e., "deviation"), and may even result in damage to the galvanometer motor structure due to manual adjustment, requiring the replacement of the entire galvanometer motor structure.

[0006] Therefore, there is an urgent need for a laser calibration method that allows for manual adjustment via adjusting screws without disassembling the housing or modifying the galvanometer motor structure, to overcome the aforementioned shortcomings of existing technologies. Furthermore, traditional methods lack an intuitive human-machine interface, and the calibration process is opaque, making it difficult to meet the demands for high precision and efficiency. Therefore, a visual and user-friendly laser calibration method is urgently needed. Summary of the Invention

[0007] Based on this, it is necessary to address the above problems. This application proposes a laser calibration method that can achieve laser calibration without disassembling the housing and manually adjusting the adjusting screws of the galvanometer motor structure.

[0008] A laser calibration method for a laser processing apparatus, the laser processing apparatus including a touch-sensitive display and an electromagnetic galvanometer mechanism, characterized in that the method includes: A light spot adjustment image is displayed on the touch-sensitive display. The light spot adjustment image includes multiple light spot adjustment touch icons, which are graphical interactive user interface objects. The multiple light spot adjustment touch icons can respectively indicate the movement direction of the light spot adjustment, including the up, down, left, and right directions. Detect contact with any of the aforementioned light spot adjustment touch icons, and while maintaining continuous contact with the light spot adjustment touch icons, continuously move the light spot adjustment touch icons on the touch-sensitive display according to the movement of the touch point; The electromagnetic galvanometer mechanism is driven in response to the continuous movement of the light spot adjustment touch icon; The electromagnetic galvanometer mechanism is driven by the driving command of the electromagnetic galvanometer mechanism, so as to deflect the electromagnetic galvanometer mechanism along the first axis or the second axis, thereby changing the position of the actual laser spot. The laser calibration is completed by changing the position of the actual laser spot until it coincides with the position of the target laser spot. Preferably, the spot adjustment image further includes: a virtual laser spot and a virtual target center, wherein the virtual laser spot can move on the spot adjustment image in response to the continuous movement of the spot adjustment touch icon.

[0009] Preferably, the light spot adjustment touch icons are arranged in the light spot adjustment image according to the top, bottom, left, and right orientations.

[0010] Preferably, the contact includes user touch or mechanical touch, and the electromagnetic galvanometer mechanism driving command includes at least an electromagnetic galvanometer mechanism deflection direction command and an electromagnetic galvanometer mechanism deflection amount command, wherein the electromagnetic galvanometer mechanism deflection direction command is determined according to the movement direction indicated by the light spot adjustment touch icon of the user touch or mechanical touch, and the electromagnetic galvanometer mechanism deflection amount command is determined according to the continuous movement distance of the light spot adjustment touch icon.

[0011] Preferably, the electromagnetic galvanometer mechanism is a two-dimensional electromagnetic galvanometer mechanism or a multi-dimensional electromagnetic galvanometer mechanism.

[0012] Preferably, the continuous movement of the light spot adjustment touch icon includes continuous movement to the left and continuous movement to the right. The continuous movement to the left corresponds to the positive deflection of the electromagnetic galvanometer mechanism along the first axis, and the continuous movement to the right corresponds to the negative deflection of the electromagnetic galvanometer mechanism along the first axis. The continuous movement of the light spot adjustment touch icon includes continuous upward movement and continuous downward movement. The continuous upward movement corresponds to the positive deflection of the electromagnetic galvanometer mechanism along the second axis, and the continuous downward movement corresponds to the negative deflection of the electromagnetic galvanometer mechanism along the second axis.

[0013] Preferably, the electromagnetic galvanometer mechanism includes a reflector and a drive assembly, wherein the reflector can be driven by the drive assembly to rotate along a first axis and / or a second axis to reflect the laser to different positions.

[0014] This application also proposes a laser calibration method for a laser processing apparatus, the laser processing apparatus including a touch-sensitive display and an electromagnetic galvanometer mechanism, characterized in that the method includes: A light spot adjustment image is displayed on the touch-sensitive display. The light spot adjustment image includes multiple light spot adjustment touch icons, which are graphical interactive user interface objects. The multiple light spot adjustment touch icons can respectively indicate the movement direction of the light spot adjustment, including the up, down, left, and right directions. Detect contact with any of the aforementioned light spot adjustment touch icons, and while maintaining continuous contact with the light spot adjustment touch icons, continuously move the light spot adjustment touch icons on the touch-sensitive display according to the movement of the touch point, so that the light spot adjustment touch icons move from the first position to the second position in the horizontal left-right direction or from the third position to the fourth position in the vertical up-down direction. The electromagnetic galvanometer mechanism is driven in response to the continuous movement of the light spot adjustment touch icon; The electromagnetic galvanometer mechanism is driven by the driving command of the electromagnetic galvanometer mechanism, so that the electromagnetic galvanometer mechanism deflects from the fifth position to the sixth position along the first axis or from the seventh position to the eighth position along the second axis, thereby changing the actual laser spot position. The actual laser spot position is changed until it coincides with the target laser spot position, and the laser calibration is completed.

[0015] Preferably, the electromagnetic galvanometer mechanism is a two-dimensional or multi-dimensional electromagnetic galvanometer mechanism, which includes a reflector and a driving component. The reflector can be driven by the driving component to deflect along a first axis and / or a second axis, thereby changing the position of the actual laser spot.

[0016] This application also proposes a laser processing apparatus, including an electromagnetic galvanometer mechanism, characterized in that it further includes: Laser source used to generate actual laser spots; An electromagnetic galvanometer mechanism for changing the position of the actual laser spot, the electromagnetic galvanometer mechanism includes a reflector and a driving component, the reflector being driven by the driving component to deflect along a first axis and / or a second axis; A touch-sensitive display is used to display a light spot adjustment image, the light spot adjustment image including a plurality of light spot adjustment touch icons, the plurality of light spot adjustment touch icons being graphical interactive user interface objects, the plurality of light spot adjustment touch icons being able to respectively indicate the movement direction of light spot adjustment, the movement direction including up, down, left, and right directions; the touch-sensitive display is also used to detect continuous movement contact of the light spot adjustment touch icons and display the continuous movement of the light spot adjustment touch icons; The control unit is electrically connected to the touch-sensitive display. The control unit is used to generate an electromagnetic galvanometer mechanism drive command in response to the continuous movement of the light spot adjustment touch icon, and to generate drive power for the electromagnetic galvanometer mechanism according to the electromagnetic galvanometer mechanism drive command, so as to deflect the reflector along the first axis or the second axis, thereby changing the position of the actual laser spot.

[0017] The embodiments of the present invention have the following beneficial effects: This invention achieves laser calibration by visually adjusting the position of the actual laser spot using a touch-sensitive display, thus aligning the actual laser spot position with the target laser spot position. Unlike the one-dimensional galvanometer motor in existing technologies, the control unit of the laser processing device generates drive commands for the electromagnetic galvanometer mechanism based on continuous touch movement on the touch-sensitive display. This controls the electromagnetic galvanometer mechanism to deflect along a first or second axis, thereby changing the position of the actual laser spot until it coincides with the target laser spot position. In existing laser calibration processes, the one-dimensional galvanometer motor is disassembled and exposed. Then, the position of the motor is changed by manually adjusting the adjusting screws of the motor structure, which in turn changes the position of the mirror mounted on the motor, thus altering the position of the actual laser spot until it coincides with the target laser spot position. Existing technologies rely entirely on manual adjustment and lack a visual display interface. The entire calibration process of this invention is electronically controlled and visualized via a user interface. It achieves higher calibration accuracy than existing manual adjustment techniques, lowers the operational threshold (existing techniques generally require professional personnel for calibration and a pollution-free environment due to disassembly of the casing), increases calibration efficiency, and avoids the situation where manual calibration and screw tightening can damage the galvanometer motor structure, necessitating complete replacement of the galvanometer motor. Furthermore, since it eliminates the need for disassembly of the casing and manual adjustment, it prevents contamination of the precision optical components inside the laser processing device.

[0018] Furthermore, in the electromagnetic galvanometer mechanism of the present invention, the magnetic component is directly fixed on the frame of the elastic component, and the magnetic excitation component is directly fixed on the electrical connector body. The sleeve arrangement of the magnetic components achieves the beneficial effects of small size, flatness, light weight, high precision, and good reliability. Using the above-mentioned electromagnetic galvanometer mechanism with small size, flatness, light weight, high precision, and good reliability in the laser calibration of the present invention makes laser calibration more efficient than the existing calibration methods. It eliminates the need to disassemble the outer shell of the device and manually adjust the position of the galvanometer motor structure using adjusting screws. It also avoids the mechanical damage and precision degradation of the processing device caused by manual adjustment in the existing technology, and eliminates the situation in the existing technology where manual adjustment of the galvanometer motor structure leads to damage to the galvanometer motor structure and requires replacement of the entire galvanometer motor structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] in: Figure 1 This is a simplified schematic diagram of a laser processing apparatus in one embodiment.

[0021] Figure 2 This is a first-angle perspective view of the electromagnetic galvanometer mechanism in one embodiment.

[0022] Figure 3 This is a second-angle perspective view of the electromagnetic galvanometer mechanism in one embodiment.

[0023] Figure 4 This is an exploded view of the electromagnetic galvanometer mechanism in one embodiment.

[0024] Figure 5 This is a schematic diagram of the electrical connector in the electromagnetic galvanometer mechanism in one embodiment.

[0025] Figure 6 This is a flowchart of a laser calibration method in one embodiment.

[0026] Figure 7 This is a schematic diagram of a visualization interface (spot adjustment image) in one embodiment. Detailed Implementation

[0027] 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.

[0028] This invention provides a laser calibration method for a laser processing device. In this embodiment, the laser processing device is specifically a handheld laser welding gun. The handheld laser welding gun has a laser output port (or laser emission port) at its front end. A light guide nozzle is typically detachably installed at this output port, and the laser output port has a geometric center. During laser calibration, the laser output port is aligned with a positioning target plate set on a calibration platform. The geometric center of the output port coincides with the actual target center of the positioning target plate. A red laser beam is fired, and the red light hits the target plate. If the red laser spot (the actual laser spot) deviates from the actual target center, calibration is required. Therefore, the need for calibration is determined by whether the red laser spot coincides with the actual target center. In another embodiment, the laser processing device can also be a laser processing machine tool.

[0029] like Figure 1 As shown, the laser processing apparatus includes: A laser is used to output a laser beam. An electromagnetic galvanometer mechanism, located downstream of the laser, is used to receive the incident laser beam and change the propagation direction of the incident laser beam by adjusting the angle. The control unit, electrically connected to the electromagnetic galvanometer mechanism, is used to control the operation of the laser processing device.

[0030] It should be noted that there are also optical elements (e.g., collimating mirrors) between the laser and the electromagnetic galvanometer mechanism, and there are also optical elements (e.g., focusing mirrors, protective mirrors) downstream of the electromagnetic galvanometer mechanism, which are not shown in the figure.

[0031] like Figure 2-5 As shown, the electromagnetic galvanometer mechanism includes: Reflector 1 is used to reflect the laser beam and adjust the reflected beam by changing its angle. The elastic component 2 includes a frame 201, at least two elastic elements 202 disposed on the frame 201, and a magnetic component 203. The reflector 1 is installed in the central region of the frame 201, and the elastic element 202 has a preset elastic degree of freedom. The electrical connector 3 includes an electrical connector body 301 and at least two magnetic excitation components 302 disposed on the electrical connector body 301. The magnetic excitation components 302 are electrically connected to the electrical connector body 301 and are disposed corresponding to the magnetic components 203 on the elastic component 2. The magnetic excitation components 302 and the magnetic components 203 constitute a driving component. One end of the electrical connector body 301 is used to receive a current adjustment command and pass a driving current to the magnetic excitation component 302, so that an electromagnetic driving force is generated between the magnetic excitation component 302 and the magnetic component 203. The electromagnetic driving force is used to drive the elastic component 2 to deform, so as to drive the reflector 1 to change its angle.

[0032] By directly fixing the magnetic excitation component 302 to the electrical connector body 301, the elastic component 2 can be directly driven without going through a complex transmission mechanism. The power can be transmitted to the elastic component 2 without loss, driving the reflector 1 to deflect, thus avoiding the problems of backlash error and friction loss that are common in traditional indirect drive. The electromagnetic galvanometer mechanism achieves the advantages of small size, flatness, light weight, high precision, and good reliability through the layout of the magnetic component 203 on the same side as the reflector 1, the sleeve of the magnetic excitation component 302, and the integrated design of direct drive and elastic component 2.

[0033] For example, a reflector 1 is fixed in the central region of the frame 201.

[0034] The function of the reflector 1 is to reflect the laser beam and change the direction of the beam by controlling its angle, thereby achieving precise control in laser processing.

[0035] For example, the electrical connector 3 is disposed on the front side of the reflector 1 on the elastic component 2, and the electrical connector body 301 has a hollow area at one end corresponding to the elastic component 2, and the hollow area does not block the effective reflection area of ​​the reflector 1.

[0036] For example, the magnetic component 301 is a permanent magnet, the magnetic excitation component 302 is a coil, the magnetic excitation component 302 forms a receiving space, the permanent magnet 301 can be placed in the receiving space of the magnetic excitation component 302 and the outer peripheral surface is provided with a gap between the inner wall of the space, so that the permanent magnet 301 can move in a preset direction within the receiving space.

[0037] For example, the electrical connector body 301 is a rigid circuit board (PCB), a flexible circuit board (FPC), a flexible flat cable (FFC), or a rigid-flex PCB.

[0038] For example, the number of driving components and elastic elements 202 is the same. When there are four driving components distributed along the first axis and the second axis (X and Y axes), two-dimensional adjustment is achieved. The first axis is the center line connecting two opposing magnetic excitation components 302, and the second axis is the center line connecting another two opposing magnetic excitation components 302. The reflector 1 can rotate around the first axis or the second axis.

[0039] For example, the electromagnetic galvanometer mechanism further includes a support base 4, which is disposed on the front side of the reflector 1 on the elastic component 2 and is rigidly connected to the elastic component 2 to limit the displacement of the elastic component 2 in the non-deformation direction. The support base 4 has a hollow area that does not block the effective reflection area of ​​the reflector 1.

[0040] For example, the support base 4 is provided with a clearance groove 401 through which the magnetic component 203 and the magnetic excitation component 302 can pass, and its position and shape are adapted to the magnetic excitation component 302.

[0041] Furthermore, the electromagnetic galvanometer mechanism also includes a support plate 5, which is disposed on the back side of the reflector 1 on the elastic component 2 and is arranged parallel to the support base 4 to form a closed support frame. The support plate 5 and the support base 4 are detachably and fastened together.

[0042] Furthermore, the electromagnetic galvanometer mechanism also includes at least two fixing members 6 for fastening the electromagnetic galvanometer mechanism. The fixing members 6 can pass through the electromagnetic galvanometer mechanism and connect to the mounting interface.

[0043] For example, the electromagnetic galvanometer mechanism further includes at least one sensor assembly disposed on the elastic component 2 and / or the electrical connector 3, the sensor assembly being electrically connected to the electrical connector 3 for real-time monitoring and feedback of the angle change of the reflector 1.

[0044] This invention eliminates redundant structural layers and significantly reduces the height of the assembly by directly fixing the magnetic components to the frame of the elastic component and arranging them on the same side as the reflector, thus achieving a flattened structure for the transmission components. The nested layout of the magnetic components further compresses space, reducing the overall size of the two-dimensional electromagnetic galvanometer mechanism, making it particularly suitable for space-constrained applications such as handheld welding torches. The elastic component serves as both a motion guide mechanism and a carrier for the magnetic components, eliminating the need for separate support seats and fasteners, significantly reducing the number of parts. This not only reduces the overall weight but also reduces potential failure points caused by loose or worn parts, improving the reliability and lifespan of the mechanism. Furthermore, the elastic component itself possesses… Excellent reset characteristics allow for rapid and smooth recovery to the initial position after the drive signal is removed. Furthermore, by directly fixing the magnetic excitation component to the electrical connector body, a complex transmission mechanism is eliminated, enabling direct drive of the elastic component. This allows for lossless transmission to the elastic component, driving the reflector deflection and avoiding common problems in traditional indirect drives such as backlash errors and frictional losses. The two-dimensional electromagnetic galvanometer mechanism of this invention achieves the advantages of small size, flatness, light weight, high precision, and high reliability through its integrated design of directly fixing the magnetic excitation component to the electrical connector body, the same-side layout of the magnetic component and the reflector, the sleeved magnetic excitation component, and the integrated design of directly fixing the magnetic component to the frame of the elastic component.

[0045] This invention provides a laser calibration method for a laser processing apparatus, such as... Figure 6 As shown, the method includes: Step 101: Display a light spot adjustment image on the touch-sensitive display. The light spot adjustment image includes multiple light spot adjustment touch icons, which are graphical interactive user interface objects. The multiple light spot adjustment touch icons can respectively indicate the movement direction of the light spot adjustment, including the up, down, left, and right directions.

[0046] Specifically, such as Figure 7As shown, the laser spot adjustment image 100 includes multiple laser spot adjustment touch icons 101, 102, 103, and 104. These multiple laser spot adjustment touch icons are graphical interactive user interface objects. The multiple laser spot adjustment touch icons 101, 102, 103, and 104 can respectively indicate the movement direction of the laser spot adjustment, including up, down, left, and right directions. It should be noted that the multiple laser spot adjustment touch icons 101, 102, 103, and 104 have up, down, left, and right directional arrow marks. Touching the laser spot adjustment touch icon 101 and continuously moving it a certain distance vertically will cause the actual laser spot to move in the corresponding direction. The so-called actual laser spot refers to the laser spot formed on the positioning target plate by the laser beam emitted from the laser output port of the laser processing device. The actual laser spot is generally in the form of red laser light, which has a better indicating function. A positioning target plate is set near and below the laser output port. Generally speaking, the center of the positioning target plate (which will be marked) coincides with the center of the laser output port.

[0047] Multiple light spot adjustment touch icons 101, 102, 103, and 104 can respectively indicate the movement direction of light spot adjustment. It should be noted that the light spot adjustment image 100 on the touch-sensitive display also includes a virtual laser light spot 105. For example, by continuously touching and moving the light spot adjustment touch icon 101 from bottom to top, the virtual laser light spot 105 will move vertically from bottom to top, and the same applies to movements in other directions. Therefore, the virtual laser light spot 105 can move on the light spot adjustment image in response to the continuous movement of the light spot adjustment touch icons 101, 102, 103, and 104. It should be noted that the virtual laser spot 105 can be in a fixed position preset by the system (at this time, the position of the virtual laser spot 105 on the spot adjustment image 100 on the touch-sensitive display does not represent the actual position of the actual laser spot on the positioning target plate); or, for example, after the actual laser spot formed on the positioning target plate by the laser beam emitted from the laser output port of a handheld laser welding gun is photographed by a camera, the relative position features of the actual laser spot and the actual target center formed on the positioning target plate are extracted, and the relative position of the actual laser spot and the actual target center formed on the positioning target plate is calculated by an algorithm and displayed on the touch-sensitive display (at this time, the position of the virtual laser spot 105 on the spot adjustment image 100 on the touch-sensitive display represents the actual position of the actual laser spot on the positioning target plate, including the relative direction and relative distance). The spot adjustment image 100 also includes a virtual target center 106, and the relative position of the virtual laser spot 105 and the virtual target center 106 represents the relative position of the actual laser spot and the actual target center.

[0048] It should be noted that the light spot adjustment touch icons 101, 102, 103 and 104 are arranged in the light spot adjustment image 100 in the top, bottom, left and right directions, but other arrangements are also possible.

[0049] Step 102: Detect contact with any of the light spot adjustment touch icons, and while maintaining continuous contact with the light spot adjustment touch icon, continuously move the light spot adjustment touch icon on the touch-sensitive display according to the movement of the touch point.

[0050] Specifically, the touch-sensitive display can take the form of user touch or mechanical touch, where user touch is done by a user's hand or stylus, and mechanical touch is done by an automated robotic arm or other similar means. The light spot adjustment touch icons 101, 102, 103, and 104 can be touched by a user or mechanically, and contact with the light spot adjustment touch icons 101, 102, 103, and 104 can be detected, forming a contact point at the contact location. While maintaining continuous contact with the light spot adjustment touch icons, the contact point can move continuously, thereby allowing the light spot adjustment touch icons 101, 102, 103, and 104 on the touch-sensitive display to be continuously moved.

[0051] Step 103: Generate an electromagnetic galvanometer mechanism drive command in response to the continuous movement of the light spot adjustment touch icon.

[0052] Specifically, the continuous movement of the light spot adjusting touch icon has a direction and a distance. This continuous movement on the touch-sensitive display is converted into an electrical signal. Since the control unit is electrically connected to the touch-sensitive display, the aforementioned electrical signal is input to the control unit. The control unit generates a drive command for the electromagnetic galvanometer mechanism based on the electrical signal. The electromagnetic galvanometer mechanism drive command includes at least an electromagnetic galvanometer mechanism deflection direction command and an electromagnetic galvanometer mechanism movement amount command. The electromagnetic galvanometer mechanism deflection direction command is determined based on the movement direction indicated by the light spot adjustment touch icon touched by the user or by mechanical touch. The electromagnetic galvanometer mechanism deflection amount command is determined based on the continuous movement distance of the light spot adjustment touch icon.

[0053] Step 104: Generate driving power for the electromagnetic galvanometer mechanism according to the driving command of the electromagnetic galvanometer mechanism, so as to deflect the electromagnetic galvanometer mechanism along the first axis or the second axis, thereby changing the actual laser spot position.

[0054] Specifically, it should be noted that the direction and amount of continuous movement of the light spot adjustment touch icon have a preset mapping relationship with the deflection direction and amount of the electromagnetic galvanometer mechanism. For example, a continuous 10μm rightward movement of the light spot adjustment touch icon 103 corresponds to a +0.05 degree deflection of the electromagnetic galvanometer mechanism along the X-axis; similarly, a continuous 10μm leftward movement of the light spot adjustment touch icon 104 corresponds to a -0.05 degree deflection of the electromagnetic galvanometer mechanism along the X-axis; and a similar mapping relationship exists for the upward or downward movement of the light spot adjustment touch icon. It should be noted that the above continuous movement is manifested as a continuous sliding of the light spot adjustment touch icon while maintaining contact. This mapping relationship is experimentally verified in advance (there will be an accurate correspondence) and stored in the control unit. Therefore, after receiving the continuous movement of the laser spot adjustment touch icon, the control unit converts the direction and amount of movement into the deflection direction and amount of the electromagnetic galvanometer mechanism, and generates a drive command for the electromagnetic galvanometer mechanism. This drive command includes at least a deflection direction command and a movement amount command, thereby driving the electromagnetic galvanometer mechanism to deflect along the first or second axis, thus changing the actual laser spot position. The deflection direction command is determined based on the movement direction indicated by the user's touch or mechanical touch of the laser spot adjustment touch icon, while the deflection amount command is determined based on the continuous movement distance of the laser spot adjustment touch icon.

[0055] Furthermore, the electromagnetic galvanometer mechanism can be a two-dimensional or multi-dimensional electromagnetic galvanometer mechanism. The terms "two-dimensional" or "multi-dimensional" refer to the fact that the reflector of the electromagnetic galvanometer mechanism can deflect around two or more axes. Of course, a two-dimensional electromagnetic galvanometer mechanism includes a reflector and a driving assembly, wherein the reflector can be driven by the driving assembly to rotate along a first axis and / or a second axis, thereby reflecting the laser to different positions.

[0056] Specifically, the continuous movement of the light spot adjustment touch icon includes continuous leftward movement and continuous rightward movement. The continuous leftward movement corresponds to the positive deflection of the electromagnetic galvanometer mechanism along the first axis, and the continuous rightward movement corresponds to the negative deflection of the electromagnetic galvanometer mechanism along the first axis. The continuous movement of the light spot adjustment touch icon also includes continuous upward movement and continuous downward movement. The continuous upward movement corresponds to the positive deflection of the electromagnetic galvanometer mechanism along the second axis, and the continuous downward movement corresponds to the negative deflection of the electromagnetic galvanometer mechanism along the second axis. Of course, continuous leftward movement can be achieved by operating the light spot adjustment touch icon 104 to move continuously to the left; continuous rightward movement can be achieved by operating the light spot adjustment touch icon 103 to move continuously to the right; continuous upward movement can be achieved by operating the light spot adjustment touch icon 101 to move continuously upward; and continuous downward movement can be achieved by operating the light spot adjustment touch icon 102 to move continuously downward.

[0057] Step 105: Change the position of the actual laser spot until it coincides with the position of the target laser spot. The laser calibration is complete.

[0058] Specifically, as described above, the spot adjustment touch icon 103 moves continuously to the right by 10μm, corresponding to "the electromagnetic galvanometer mechanism deflecting along the X-axis by +0.05 degrees." At this time, the actual laser spot on the positioning target plate will move continuously to the right by 10μm. Of course, when the spot adjustment touch icon 103 moves 10μm to the right, the virtual laser spot 105 in the spot adjustment image on the touch-sensitive display will also move 10μm to the right. Therefore, after the spot adjustment touch icon 103 moves continuously to the right by 10μm, if the actual laser spot (not shown) and the actual target center (not shown) on the positioning target plate are still offset and do not coincide, the spot adjustment touch icon 103 can continue to move continuously to the right until the position of the actual laser spot coincides with the position of the target laser spot (i.e., the actual target center). Of course, if the light spot adjustment touch icon 3 is found to have moved too far to the right, the light spot adjustment touch icon 104 can be moved to the left. A similar relationship exists for the light spot adjustment touch icon moving upward or downward. After the light spot adjustment touch icon 103 stops moving to the right, the touch point is released, and the light spot adjustment touch icon 103 will return to its initial position; the other light spot adjustment touch icons are similar.

[0059] This invention also provides a laser calibration method for a laser processing apparatus, the laser processing apparatus including a touch-sensitive display and an electromagnetic galvanometer mechanism, characterized in that the method includes: A spot adjustment image 100 is displayed on a touch-sensitive display. The spot adjustment image 100 includes multiple spot adjustment touch icons 101, 102, 103 and 104. The multiple spot adjustment touch icons are graphical interactive user interface objects. The multiple spot adjustment touch icons can respectively indicate the movement direction of spot adjustment. The movement direction includes up, down, left and right directions. Detect contact with any light spot adjustment touch icon, and while maintaining continuous contact with the light spot adjustment touch icon, continuously move the light spot adjustment touch icon on the touch-sensitive display according to the movement of the touch point, so that the light spot adjustment touch icon moves from the first position to the second position in the horizontal left or right direction, or moves from the third position to the fourth position in the vertical up or down direction. The electromagnetic galvanometer mechanism is driven in response to the continuous movement of the touch icon adjusted by the light spot. The electromagnetic galvanometer mechanism is driven by the driving command of the electromagnetic galvanometer mechanism, so that the electromagnetic galvanometer mechanism deflects from the fifth position to the sixth position along the first axis or from the seventh position to the eighth position along the second axis, thereby changing the actual laser spot position. The laser calibration is completed when the actual laser spot position is changed until it coincides with the target laser spot position (i.e., the actual target center).

[0060] Furthermore, the electromagnetic galvanometer mechanism is a two-dimensional or multi-dimensional electromagnetic galvanometer mechanism, which includes a reflector and a driving component. The reflector can be driven by the driving component to rotate along a first axis and / or a second axis to reflect the laser to different positions.

[0061] This invention also provides a laser processing apparatus, comprising: Laser source used to generate actual laser spots; An electromagnetic galvanometer mechanism for changing the actual laser spot position, the electromagnetic galvanometer mechanism includes a reflector and a driving component, the reflector can be driven by the driving component to deflect along a first axis and / or a second axis; A touch-sensitive display is used to display a spot adjustment image, which includes multiple spot adjustment touch icons. These multiple spot adjustment touch icons are graphical interactive user interface objects, and each of the multiple spot adjustment touch icons can individually indicate the movement direction of the spot adjustment, including up, down, left, and right directions. The touch-sensitive display is also used to detect continuous movement of the spot adjustment touch icons and display the continuous movement of the spot adjustment touch icons. The control unit is electrically connected to the touch-sensitive display. The control unit generates an electromagnetic galvanometer mechanism drive command in response to the continuous movement of the laser spot adjustment touch icon. Based on the electromagnetic galvanometer mechanism drive command, the control unit generates drive power for the electromagnetic galvanometer mechanism to deflect the reflector along the first axis or the second axis, thereby changing the actual laser spot position.

[0062] It should be noted that the laser source used to generate the actual laser spot initially generates a laser beam. After the laser beam is propagated through optical fiber and processed by a lens, it can eventually form an actual laser spot on the positioning target plate.

[0063] Furthermore, to ensure that the position of the virtual laser spot 105 on the spot adjustment image 100 can actually represent the position of the actual laser spot on the positioning target plate, the laser processing device of the present invention also includes a camera. The camera is used to take pictures of the position of the actual laser spot on the positioning target plate. After the control unit extracts features from the picture image, it calculates the relative position of the actual laser spot and the actual target center formed on the positioning target plate according to a preset algorithm, and displays it on the touch screen (at this time, the position of the virtual laser spot 105 on the spot adjustment image 100 on the touch screen represents the actual position of the actual laser spot on the positioning target plate, including the relative direction and relative distance).

[0064] This invention also provides a laser processing apparatus, including a processor and a memory. The memory stores a computer program, and when the computer program is executed by the processor, the processor performs the laser calibration method of the laser processing apparatus described above. It should be noted that this invention uses a visible indicator laser (e.g., a red indicator laser, which forms a red laser spot on the positioning target plate) for calibration. In other cases, a visible non-indicator laser (e.g., a processing laser) can also be used, but an attenuator must be used to attenuate the processing laser before laser calibration can be performed. Therefore, the scope of protection of this invention is not limited to the calibration of red lasers, but also includes the calibration of processing lasers.

[0065] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A laser calibration method for a laser processing apparatus, the laser processing apparatus comprising a touch-sensitive display and an electromagnetic galvanometer mechanism, characterized in that, The method includes: A light spot adjustment image is displayed on the touch-sensitive display. The light spot adjustment image includes multiple light spot adjustment touch icons, which are graphical interactive user interface objects. The multiple light spot adjustment touch icons can respectively indicate the movement direction of the light spot adjustment, including the up, down, left, and right directions. Detect contact with any of the aforementioned light spot adjustment touch icons, and while maintaining continuous contact with the light spot adjustment touch icons, continuously move the light spot adjustment touch icons on the touch-sensitive display according to the movement of the touch point; The electromagnetic galvanometer mechanism is driven in response to the continuous movement of the light spot adjustment touch icon; The electromagnetic galvanometer mechanism is driven by the driving command of the electromagnetic galvanometer mechanism, so as to deflect the electromagnetic galvanometer mechanism along the first axis or the second axis, thereby changing the position of the actual laser spot. The actual laser spot position is changed until it coincides with the target laser spot position, and the laser calibration is completed.

2. The laser calibration method for the laser processing apparatus according to claim 1, characterized in that, The light spot adjustment image further includes: a virtual laser spot and a virtual bullseye, wherein the virtual laser spot can move on the light spot adjustment image in response to the continuous movement of the light spot adjustment touch icon.

3. The laser calibration method for the laser processing apparatus according to claim 1, characterized in that, The light spot adjustment touch icons are arranged in the light spot adjustment image according to the top, bottom, left, and right positions.

4. The laser calibration method for the laser processing apparatus according to claim 1, characterized in that, The contact includes user touch or mechanical touch. The electromagnetic galvanometer mechanism drive command includes at least an electromagnetic galvanometer mechanism deflection direction command and an electromagnetic galvanometer mechanism deflection amount command. The electromagnetic galvanometer mechanism deflection direction command is determined based on the movement direction indicated by the light spot adjustment touch icon of the user touch or mechanical touch. The electromagnetic galvanometer mechanism deflection amount command is determined based on the continuous movement distance of the light spot adjustment touch icon.

5. The laser calibration method for the laser processing apparatus according to claim 1, characterized in that, The electromagnetic galvanometer mechanism is either a two-dimensional electromagnetic galvanometer mechanism or a multi-dimensional electromagnetic galvanometer mechanism.

6. The laser calibration method for the laser processing apparatus according to claim 5, characterized in that, The continuous movement of the light spot adjustment touch icon includes continuous movement to the left and continuous movement to the right. The continuous movement to the left corresponds to the positive deflection of the electromagnetic galvanometer mechanism along the first axis, and the continuous movement to the right corresponds to the negative deflection of the electromagnetic galvanometer mechanism along the first axis. The continuous movement of the light spot adjustment touch icon includes continuous upward movement and continuous downward movement. The continuous upward movement corresponds to the positive deflection of the electromagnetic galvanometer mechanism along the second axis, and the continuous downward movement corresponds to the negative deflection of the electromagnetic galvanometer mechanism along the second axis.

7. The laser calibration method for the laser processing apparatus according to claim 1, characterized in that, The electromagnetic galvanometer mechanism includes a reflector and a driving component. The reflector can be driven by the driving component to deflect along a first axis and / or a second axis, thereby changing the actual laser spot position.

8. A laser calibration method for a laser processing apparatus, the laser processing apparatus comprising a touch-sensitive display and an electromagnetic galvanometer mechanism, characterized in that, The method includes: A light spot adjustment image is displayed on the touch-sensitive display. The light spot adjustment image includes multiple light spot adjustment touch icons, which are graphical interactive user interface objects. The multiple light spot adjustment touch icons can respectively indicate the movement direction of the light spot adjustment, including the up, down, left, and right directions. Detect contact with any of the light spot adjustment touch icons, and while maintaining continuous contact with the light spot adjustment touch icons, continuously move the light spot adjustment touch icons on the touch-sensitive display according to the movement of the touch point, so that the light spot adjustment touch icons move from the first position to the second position in the horizontal left-right direction or from the third position to the fourth position in the vertical up-down direction. The electromagnetic galvanometer mechanism is driven in response to the continuous movement of the light spot adjustment touch icon; The electromagnetic galvanometer mechanism is driven by the driving command of the electromagnetic galvanometer mechanism, so that the electromagnetic galvanometer mechanism deflects from the fifth position to the sixth position along the first axis or from the seventh position to the eighth position along the second axis, thereby changing the actual laser spot position. The actual laser spot position is changed until it coincides with the target laser spot position, and the laser calibration is completed.

9. The laser calibration method for the laser processing apparatus according to claim 8, characterized in that, The electromagnetic galvanometer mechanism is a two-dimensional or multi-dimensional electromagnetic galvanometer mechanism, which includes a reflector and a driving component. The reflector can be driven by the driving component to deflect along a first axis and / or a second axis, thereby changing the position of the actual laser spot.

10. A laser processing apparatus, characterized in that, Also includes: Laser source used to generate actual laser spots; An electromagnetic galvanometer mechanism for changing the position of the actual laser spot, the electromagnetic galvanometer mechanism includes a reflector and a driving component, the reflector being driven by the driving component to deflect along a first axis and / or a second axis; A touch-sensitive display is used to display a light spot adjustment image, the light spot adjustment image including a plurality of light spot adjustment touch icons, the plurality of light spot adjustment touch icons being graphical interactive user interface objects, the plurality of light spot adjustment touch icons being able to respectively indicate the movement direction of light spot adjustment, the movement direction including up, down, left, and right directions; the touch-sensitive display is also used to detect continuous movement contact of the light spot adjustment touch icons and display the continuous movement of the light spot adjustment touch icons; A control unit, electrically connected to the touch-sensitive display, is configured to generate an electromagnetic mirror mechanism drive command in response to the continuous movement of the light spot adjustment touch icon, and generate drive power for the electromagnetic mirror mechanism according to the electromagnetic mirror mechanism drive command, so as to deflect the reflector along the first axis and / or the second axis, thereby changing the position of the actual laser spot.

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