TWM618075U - Laser marking device - Google Patents

Abstract

A laser marking device is provided. The laser marking device includes a motor, a laser source, an optical component and a controller. The motor drives a workpiece to rotate. Galvanometers of the optical component move along a first direction and a second direction to transport a laser beam. The controller is configured to: receive a marking drawing file and a workpiece drawing file; generate a mapping information according to the marking drawing file and the workpiece drawing file; set a distance between a reference position of the optical component and a processed surface of the workpiece to equal to a preset distance; calculate a second velocity of the workpiece according to a planning route and a first velocity of the optical component; calculate an on/off information of the laser source according to the mapping information, the first velocity and the second velocity. The optical component performs a marking process according to the on/off information.

Description

Laser marking device

The new creation relates to a laser marking device, and particularly to a laser marking device that can perform continuous and uninterrupted processing of workpieces with large contour changes.

In the conventional technical field, when a laser marking device is used to perform a marking procedure on a workpiece with a large contour shape change, it is often necessary to set up a complicated mechanism or to complete it through multiple and complicated procedures. It is usually necessary to install a galvanometer with high-dimensional movement capability, or it is necessary to drive the workpiece to move in multiple dimensions, thereby increasing the production cost. Or, some conventional technologies need to provide multiple processing procedures in order to complete the processing procedures of a single workpiece, which also causes difficulties in the production process and reduces the efficiency of workpiece processing.

This new creation provides a laser marking device that can meet the continuous and uninterrupted processing requirements of workpieces of any shape.

The laser marking device created by the new model includes a motor, a laser source, an optical element and a controller. The motor is used to drive the workpiece to rotate according to the rotation axis. The laser source sends out a laser beam. The optical element is coupled to the laser source. The optical element has a galvanometer to move along the first direction and the second direction to transmit the laser beam to the workpiece. The controller is coupled to the motor, the optical element and the laser source. The controller is used to: receive the marking image file and the workpiece image file; make the marking image file correspond to the workpiece image file to generate mapping information; based on the mapping information, make the distance between the reference position of the optical element and the processing surface of the workpiece equal to the preset Distance; In the marking program, the planned path is calculated according to the marking drawing file, and the second speed of the workpiece is calculated according to the planned path and the first speed of the optical element; and, according to the mapping information, the first speed and the first speed The second speed is used to calculate the opening and closing time information of the laser source. Among them, the optical element executes the marking procedure according to the opening and closing time information.

Based on the above, the creative embodiment of the present invention performs laser marking on the workpiece by moving the galvanometer on the optical element in different directions and cooperating with the motor to drive the workpiece to rotate. Based on maintaining the distance between a reference position on the optical element and the processing surface of the workpiece, the laser marking device created by the new invention can effectively perform continuous and uninterrupted laser marking actions on workpieces that can have any shape, reducing the laser The complexity of the marking action and save the time required for the marking action.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a laser marking device according to an embodiment of the present invention. The laser marking device 100 includes a motor 110, a laser source 120, an optical element 130 and a controller 150. The motor 110 is coupled to the workpiece 160. The motor 110 is used to drive the workpiece 160 to rotate according to the rotation axis. The laser source 120 is used to send a laser beam LBA. The optical element 130 is coupled to the laser source 120. The optical element 130 has a galvanometer 140 for transmitting the laser beam LB to the surface of the workpiece 160 and executes a laser marking (engraving) procedure on the surface of the workpiece 160. In this embodiment, the controller 150 controls the optical element 130 to move (for example, rotate) the galvanometer 140, so that the laser beam LB moves in the first direction and the second direction to perform a two-dimensional space on the workpiece 160 The scanning action to execute the marking procedure. Wherein, the above-mentioned first direction and the second direction may be orthogonal to each other.

In this embodiment, there is no fixed limit to the shape of the workpiece 160. In other words, the workpiece 160 can be a special-shaped workpiece, that is, the outer contour of the workpiece can be any shape. The laser beam LB is moved in a two-dimensional space through the optical element 130, and the motor 110 drives the workpiece 160 to rotate, so that the laser marking device 100 can execute a three-dimensional marking program on the workpiece 160.

On the other hand, the controller 150 is coupled to the motor 110, the optical element 130 and the laser source 120. The controller 150 is used to control the actions of the motor 110, the optical element 130, and the laser source 120 to execute the marking procedure. In terms of operation details, the controller 150 can receive the marking image file MF1 and the workpiece image file WSF1. Among them, one or more marking patterns and distance information between the marking patterns are recorded in the marking pattern file MF1. The workpiece drawing file WSF1 can record the relevant information on the mechanism such as the shape of the workpiece 160. In the example, the marking drawing file MF1 and the workpiece drawing file WSF1 can be 2D drawing files or 3D drawing files.

The controller 150 is used to make the marking image file MF1 correspond to the workpiece image file WSF1 to generate mapping information. Please refer to FIG. 2 and FIG. 1 synchronously. FIG. 2 is a schematic diagram of the method of generating the mapping information between the marking image file and the workpiece image file according to the creative embodiment of the present invention. In Figure 2, the marking pattern file MF1 can record multiple marking patterns OB1~OB3 and the distance information between the marking patterns OB1~OB3. The distance information between the marking patterns OB1~OB3 can be based on the marking pattern OB1 ~OB3 corresponding to multiple feature positions to obtain. The profile description information of the workpiece 160 can be recorded in the workpiece drawing file WSF1. The controller 150 can set the first reference point in the marking drawing file, and set the second reference point O in the workpiece drawing file. By making the first reference point in the marking drawing file MF1 coincide with the second reference point O in the workpiece drawing file WSF1, and then performing geometric calculations by corresponding to the marking patterns OB1~OB3 and the contour description information of the workpiece 160, you can Obtain the marking image file MF1 corresponding to the workpiece image file WSF1 to generate a mapping information MAF. The controller 150 can calculate the length along the contour of the workpiece 150 by executing an application program, and map the marking patterns OB1 to OB3 to the surface of the workpiece 160. In this embodiment, the distance information between the marking patterns OB1~OB3 includes length information L1~L3 and depth information D1~D3.

Among them, taking the second reference point O as the origin, according to the multiple characteristic positions of the marking patterns OB1 to OB3 in the marking drawing file MF1 and the position correspondence between the second reference point O, the controller 150 can calculate the marking The coordinates of the marking pattern OB1 in the extending direction of the contour of the workpiece 160 are length information L1, the depth coordinates of the marking pattern OB1 are depth information D1; the coordinates of the marking pattern OB2 in the extending direction of the contour of the workpiece 160 are length information L2, marking The depth coordinate of the marking pattern OB2 is depth information D2; the coordinate of the marking pattern OB3 in the extension direction of the contour of the workpiece 160 is the length information L3, and the depth coordinate of the marking pattern OB3 is the depth information D3, thereby generating the mapping information MAF.

Of course, the three marking patterns OB1~OB3 recorded in the above marking image file MF1 are only examples for illustration. In other embodiments of the present invention, there may be one or more marking patterns recorded in the marking image file, and there is no fixed limit.

1 again, the controller 150 maintains the distance between the reference position REFP of the optical element 130 and a processing surface of the workpiece 160 at a preset distance based on the mapping information MAF. 1 and FIGS. 3A to 3C are simultaneously referred to here. FIGS. 3A to 3C show schematic diagrams of the positional relationship between the workpiece surface and the reference position of the optical element in the marking procedure in the creative embodiment of the present invention. Based on the marking procedure, the workpiece 160 can be rotated according to the rotation axis CT, and under the condition that the workpiece 160 is a special-shaped workpiece, the surface of the workpiece 160 receiving the laser beam LB will change in position. In this embodiment, the controller 150 can drive the optical element 130 to adjust the position, and make the distance between the reference position REFP on the optical element 130 and the surface of the workpiece 160 receiving the laser beam LB constant.

In this embodiment, the reference position REFP may be the position of the light exit port where the optical element 130 emits the light beam LB.

In detail, in FIG. 3A, the rotation axis CT is set on the reference line REP2, and the reference position REFP of the optical element 130 is set on the reference line REP1. At this time, the distance between the reference position REFP and the processing surface of the workpiece 160 is It can be generated according to the focal length of the laser beam LB provided by the optical element 130.

In FIG. 3B, when the workpiece 160 rotates, the vertical distance between the processing surface of the workpiece 160 and the reference line REP1 is shortened. At this time, in order to keep the energy sent by the laser beam LB on the processing surface of the workpiece 160 constant, the controller 150 of this embodiment can drive the optical element 130 back (away from the reference line RFP2), and maintain the reference position REFP and the processing of the workpiece 160 The distance between the surfaces does not change.

In FIG. 3C, when the workpiece 160 continues to rotate, the vertical distance between the processing surface of the workpiece 160 and the reference line REP1 becomes longer. At this time, also in order to maintain a fixed energy of the laser beam LB sent on the processing surface of the workpiece 160, the controller 150 of this embodiment can drive the optical element 130 forward (close to the reference line RFP2), and maintain the reference position REFP and the workpiece 160. The distance between the machined surfaces does not change.

In this embodiment, by dynamically adjusting the optical element 130, the energy of the laser beam LB transmitted to the processing surface of the workpiece 160 can be substantially unchanged, and the uniformity of laser marking quality can be effectively maintained.

Please refer to FIG. 1 again, and the controller 150 is in the marking procedure and can calculate a planned path according to the marking drawing file MF1. The controller 150 calculates the second speed of the workpiece 160 according to the planned path and the first speed of the optical element 130. Please refer to FIG. 1 and FIG. 4 simultaneously, in which FIG. 4 is a schematic diagram of the scanning action of the optical element of the creative embodiment of the present invention. The optical element 130 can be scanned on the processing surface of the workpiece 160. The optical element 130 moves along the first axis DIR1 at a first speed Vg, and the workpiece moves along the second axis DIR2 at a second speed Va. To perform the scan action. Under the condition that the marking pattern 410 on the scanned working surface has a length L and a height H, the second speed Va = L / t _galvo , where t _galvo is the scanning time of the processed surface 410. And, t _galvo = H*NSL / Vg + scan delay time. Among them, NSL is the number of vertical scan lines, and the scan delay time can be set by the designer. The main purpose of setting the scan delay time of the new creation is to reduce the servo lag between the first speed Vg and the second speed Va, so as to improve the accuracy of marking.

According to the above description, after the controller 150 sets the moving speed of the optical element 130 along the first axis DIR1 (first speed Vg), the above mathematical formula can be used to calculate the moving speed of the workpiece along the second axis DIR2 ( The second speed Va), that is, the moving speed of the workpiece 160.

Incidentally, the first speed Vg and the second speed Va in this embodiment may be the sum of multiple vectors. In addition, the controller 150 can control the first speed Vg to maintain a predetermined speed value during the marking procedure.

It is worth mentioning that in the illustration of FIG. 4, each vertical scan line may include a dotted line part DLA and a solid line part SLA. When executing the marking procedure, corresponding to the dotted line part DLA, the controller 150 can make the laser source 120 turn off the laser beam LBA, and corresponding to the solid line part SLA, the controller 150 can make the laser source 120 turn on the laser beam LBA Sent. In other words, the controller 150 can calculate the opening and closing time information of the laser source 120 according to the mapping information, the first speed Vg and the second speed Va, and control the opening and closing actions of the laser source 120 accordingly.

According to the above description, the optical element 130 can send the laser beam LB according to the opening and closing time information provided by the controller 150 to perform the marking process on the workpiece 160.

It is worth mentioning that, in order to maintain the implementation quality of the marking procedure, the controller 150 of the creative embodiment of the present invention detects a relationship change amount of the corresponding relationship between the first speed Vg and the second speed Va. From the above description, it is not difficult to know that the first speed Vg and the second speed Va in the creative embodiment of the present invention need to maintain a fixed relationship. Therefore, the controller 150 can detect the change of the corresponding relationship between the first speed Vg and the second speed Va at any time. When the controller 150 detects that the change in the relationship between the first speed Vg and the second speed Va is greater than a preset first threshold, the controller 150 can adjust the first speed according to the map information of the relationship change and the processed image MF1. Speed Vg (for example, adjusted to the third speed), and correspondingly adjust the second speed Va (for example, adjusted to the fourth speed) and adjust the opening and closing time information of the laser source 120. In other embodiments of the present invention, the above-mentioned first speed Vg and second speed Va may not need to be adjusted synchronously, and the controller 150 may adjust the first speed Vg and the first speed Vg and the second speed Vg according to the relationship change amount mapping information and the processing image file MF1. One of the two speeds Va, or adjustment for both the first speed Vg and the second speed Va, is not limited.

On the other hand, when the change in the relationship between the first speed Vg and the second speed Va is greater than a preset second threshold value (where the second threshold value is greater than the first threshold value), it means that the first speed Vg and the first speed The amount of change in the relationship between the two speeds Va has exceeded the controllable range, and the controller 150 can correspondingly generate a warning signal and stop the marking procedure. The warning signal can be generated through light, sound, vibration, or any method known to those with ordinary knowledge in the art, and there is no certain limit.

In this embodiment, both the first threshold value and the second threshold value can be set by engineers based on actual requirements, limitations of hardware devices, or other arbitrary factors, and there is no fixed limit.

Regarding the hardware architecture, the motor 110 can be any device that drives the workpiece 160 to move (rotate) according to electrical signals. The controller 150 can be any form of processor circuit with computing capability, and there is no fixed limit.

Please refer to FIG. 5A and FIG. 5B below. FIG. 5A and FIG. 5B are schematic diagrams of the operation of the laser marking device that executes the marking procedure through the two-dimensional galvanometer in the creative embodiment of the present invention. In FIG. 5A, at time t1, the laser marking device 500 transmits the optical element 530 through the movement MV1 in the first direction, and generates a laser beam LB that scans SC1 in the second direction. With the rotation of the workpiece 560, The marking program of the first machined surface of the workpiece 560 is executed. In FIG. 5B, at another time t2, the laser marking device 500 transmits the optical element 530 through the movement MV2 in the first direction, and generates a laser beam LB that scans SC2 in the second direction, in conjunction with the rotation of the workpiece 560 , The marking program of the second processing surface of the workpiece 560 can be executed.

It can be known from the above description that the optical element 530 of the creative embodiment of the present invention only needs to be equipped with a two-dimensional galvanometer to effectively complete the three-dimensional marking procedure on the workpiece 560. As the motor controls the movement of the workpiece 560 according to the rotation axis and the galvanometer, in addition to keeping the processed surface of the workpiece 560 in the emission direction of the laser beam of the optical element 530, it can also make the other surface of the workpiece effective. The processing is carried out in order to achieve the effect of continuous and uninterrupted processing of any shape.

In addition, through the movement of the optical element 530 in the first direction MV1 and MV2, the focal length of the laser beam LB on the processing surface of the workpiece 560 can be maintained consistent, effectively controlling the uniformity of the laser beam LB transmission to the processing surface, and improving the The quality of the printed label pattern.

Next, please refer to FIGS. 6A to 6D. FIGS. 6A to 6D are schematic diagrams of the action flow of the laser marking program according to an embodiment of the new creation. First, in FIG. 6A, the controller of the laser marking device is loaded into the workpiece image file 610, where the workpiece image file 610 records the contour information of the workpiece 660. In FIG. 6B, the controller loads a marking image file 620, where the marking image file 620 records marking patterns OB1 to OB3 and distance information composed of length information L1 to L3 and depth information D1 to D3. The controller can make the workpiece image file 610 and the marking image file 620 correspond to generate a mapping information (as shown in FIG. 6A). The details of the generation of the mapping information have been described in detail in the embodiment of FIG. 2 and will not be repeated here.

In FIG. 6C, the controller can execute the mechanism chain calculation to determine the axial posture direction according to the appearance of the workpiece. For example, according to the normal vector N1 of multiple processing surfaces of the workpiece to determine the axial attitude direction, and when the workpiece rotates to different angles, it can still maintain the same incident state as the laser beam sent by the optical element .

Then, in FIG. 6D, the controller can calculate the processing paths of all galvanometers according to the marking image file 620; calculate the movement speeds of different axial directions (such as the first speed Vg and the second speed Va); and determine the posture according to the contour of the object . The controller also controls the laser source to send or close the laser beam at the correct position of a single scan line, and enables the galvanometer in the optical element to be processed at a steady speed.

The control details of the first speed Vg and the second speed Va are described in detail in the embodiment of FIG. 4, and will not be repeated here.

According to the above description, the controller can effectively control the optical components, motors, and laser sources to perform stable marking procedures on the workpiece. In addition, the controller can instantly monitor the changes in the movement speeds of multiple different axial directions, and effectively make immediate corrections to maintain the normal execution of the marking program. Furthermore, the controller can stop the marking procedure and send a warning signal when the relationship between the movement speeds of multiple different axial directions changes too much. In this way, the workpiece and the laser marking device can be prevented from being damaged due to hardware failure. The engineering staff can also perform maintenance actions in real time to maintain the normal operation of the production line.

Please refer to FIG. 7A and FIG. 7B below. FIG. 7A and FIG. 7B respectively illustrate the operation schematic diagram of the laser marking device that executes the marking procedure through the three-dimensional galvanometer in the creative embodiment of the present invention. In FIG. 7A, the laser marking device 710 is provided with a beam expander zoom lens 712 (beam adjuster) to receive the laser beam LB from the laser source. The beam expanding zoom lens 712 transmits the expanded laser beam LB to the optical element 711. Through the reflection action of the galvanometers GV1 and GV2, and then through the function of the light beam element 713, the laser beam LB can be transmitted to the processing surface of the workpiece. In this embodiment, by moving the beam expander zoom lens 712 in the direction DIR, the focal length of the laser beam LB can be adjusted and the energy of the laser beam LB transmitted to the processing surface of the workpiece can be maintained. The direction DIR is the same as the transmission direction of the laser beam LB.

In this embodiment, the beam expander zoom lens 712 may be arranged in the optical element 711 or may also be arranged outside the optical element 711. The beam expanding zoom lens 712 may have a moving speed that is the third speed. Through the galvanometers GV1 and GV2 extending the first speed and the second speed in different directions, in conjunction with the fifth speed of the beam expander zoom lens 712, the laser marking device 710 can provide a laser beam LB that moves in a three-dimensional space.

In FIG. 7B, the laser marking device 720 is provided with a focusing mirror 722 (beam adjuster) to receive the laser beam LB from the laser source. The focusing lens 722 transmits the focused laser beam LB to the optical element 721. Through the reflection action of the galvanometer GV3 and GV4, and then through the function of the beam light element 723, the laser beam LB can be transmitted to the processing surface of the workpiece. In this embodiment, by also moving the focusing lens 722 in the direction DIR (equivalent to the sending direction of the laser beam LB), the focal length of the laser beam LB can be adjusted and the laser beam LB can be maintained to be transmitted to the workpiece on the processing surface. energy.

In this embodiment, the focusing lens 722 may be arranged in the optical element 721 or may also be arranged outside the optical element 721. The focusing lens 722 may also have a moving speed of the sixth speed. The laser marking device 720 can also provide a laser beam LB moving in a three-dimensional space through the first speed and the second speed of the galvanometer GV1 and GV2 in different directions, in conjunction with the third speed of the focusing lens 722.

It can be seen from the structure of the three-dimensional galvanometer shown in FIGS. 7A and 7B that by controlling the galvanometers GV1 to GV4, the movement of the laser beam LB in the first direction and the second direction can be controlled. By controlling the movement of the beam expanding zoom lens 712 and the focusing lens 722, the movement of the laser beam LB in the third direction can be controlled, and the laser beam LB can produce a three-dimensional movement effect. In this way, the laser marking device 710, 720 of the creative embodiment of the present invention can execute the laser marking procedure for the workpiece of any shape with a non-columnar structure, and achieve the effect of continuous and uninterrupted processing of any shape.

It is worth mentioning that in the embodiments in FIG. 7A and FIG. 7B, the controllers in the laser marking devices 710 and 720 can be used to determine the displacement of the laser beam LB in three directions in different dimensions per unit time. The sum is used to calculate the fifth speed (or sixth speed) of the beam expander zoom lens 712 (or focusing lens 722), and the opening and closing time of the laser source is calculated according to the second speed and the fifth speed (or sixth speed) News. Moreover, in this embodiment, the controller is further used to calculate the relationship change between the second speed and the fifth speed (or the sixth speed). When the relationship change is greater than the preset first threshold value, according to the relationship The amount of change, the mapping information, and the processing image file are used to determine whether to adjust the fifth speed to the seventh speed, and to determine whether to adjust the second speed to the eighth speed, and thereby adjust the opening and closing time information of the laser source. In addition, the controller is further used to generate a warning signal and stop the marking process when the relationship change is greater than a preset second threshold, where the second threshold is greater than the first threshold.

Please refer to FIG. 8. FIG. 8 shows a flowchart of a laser marking control method according to an embodiment of the present invention. In step S810, a motor is provided to drive the workpiece to rotate according to the rotation axis. In step S820, the laser source is made to send the laser beam; in step S830, the galvanometer of the optical element is moved in the first direction and the second direction to transmit the laser beam to the workpiece. In step S840, the marking image file and the workpiece image file are received, and in step S850, the marking image file is corresponding to the workpiece image file to generate mapping information. In step S860, based on the mapping information, the distance of the processing surface of the workpiece at the reference position of the optical element is made equal to the preset distance. In step S870, in the marking program, the planned path is calculated according to the marking drawing file, and the second speed of the workpiece is calculated according to the planned path and the first speed of the optical element. In step S880, the opening and closing time information of the laser source is calculated according to the mapping information, the first speed and the second speed. And, in step S890, the optical element is caused to execute the marking process according to the opening and closing time information.

Regarding the operation details of the foregoing steps, detailed descriptions have been made in the foregoing multiple embodiments, and will not be described in detail below.

To sum up, the laser marking device created by the new invention provides a laser beam that can be moved in two or three dimensions by controlling the galvanometer, and with the movement of the workpiece, it can effectively complete the laser marking of any shape of the workpiece. program. The laser marking device of the creative embodiment of the present invention can maintain the distance between the launch position of the laser beam and the processing surface of the workpiece, effectively maintain the energy of the laser beam projected to the processing surface of the workpiece, and improve the quality of laser marking.

100, 710, 720: laser marking device 110: Motor 120: Laser source 130, 530, 711, 721: optical components 140, GV1, GV2, GV3, GV4: Galvanometer 150: Controller 160, 560, 660: Workpiece 500: Laser marking device 712: Expander zoom lens 722: Focusing Mirror D1~D3: in-depth information DIR: Direction DIR1: first axis DIR2: second axis DLA: dashed part H: height L: length L1~L3: length information LB, LBA: laser beam MAF: Mapping Information MF1, 620: Marking drawing files MV1, MV2: mobile N1: Normal vector NSL: the number of vertical scan lines O: Reference point OB1~OB3, 410: marking pattern REFP: Reference position REP1, REP2: reference line S810~S880: Steps of the control method SC1, SC2: Scan SLA: solid line part Va: second speed Vg: first speed WSF1, 610: Workpiece drawing files

Fig. 1 shows a schematic diagram of a laser marking device according to an embodiment of the invention. FIG. 2 is a schematic diagram of the generating method of the mapping information between the marking image file and the workpiece image file according to the creative embodiment of the present invention. 3A to 3C show schematic diagrams of the positional relationship between the surface of the workpiece and the reference position of the optical element in the marking procedure in the creative embodiment of the present invention. FIG. 4 is a schematic diagram of the scanning action of the optical element of the creative embodiment of the present invention. 5A and 5B are schematic diagrams showing the action of the laser marking device that executes the marking procedure through the two-dimensional galvanometer in the creative embodiment of the present invention. 6A to 6D are schematic diagrams showing the action flow of the laser marking program according to an embodiment of the new creation. 7A and 7B respectively show schematic diagrams of the actions of the laser marking device that executes the marking procedure through the three-dimensional galvanometer in the creative embodiment of the present invention. Fig. 8 shows a flow chart of a laser marking control method according to an embodiment of the present invention.

100: Laser marking device

110: Motor

120: Laser source

130: optical components

140: Galvanometer

150: Controller

160: Workpiece

LB, LBA: laser beam

MF1: Marking image file

WSF1: Workpiece image file

REFP: Reference position

Claims (9)

A laser marking device includes: A motor for driving a workpiece to rotate according to a rotation axis; A laser source sends a laser beam; An optical element, coupled to the laser source, having a galvanometer to move in a first direction and a second direction to transmit the laser beam to the workpiece; and A controller coupled to the motor, the optical element and the laser source, the controller is used for: Receive a marking drawing file and a workpiece drawing file; Corresponding to the marking image file and the workpiece image file to generate a mapping information; Based on the mapping information, make the distance between a reference position of the optical element and a processing surface of the workpiece equal to a predetermined distance; In a marking program, a planned path is calculated according to the marking drawing file, and a second speed of the workpiece is calculated according to the planned path and a first speed of the optical element; and According to the mapping information, the first speed and the second speed to calculate an opening and closing time information of the laser source, Wherein, the optical element executes the marking procedure according to the opening and closing time information. The laser marking device according to claim 1, wherein the marking image file records at least one marking pattern and distance information between the at least one marking pattern, and the controller is further used for: Set a first reference point in the marking drawing file, set a second reference point in the workpiece drawing file, and calculate a first position correspondence between the first reference point and the second reference point; According to a second position correspondence between the multiple characteristic positions in the marking image file and the second reference point; and The mapping information is obtained according to the corresponding relationship between the first position and the corresponding relationship between the second position. The laser marking device according to claim 1, wherein in the marking procedure, the optical element is scanned on the processing surface according to a first axis and a second axis, and the first speed is the The moving speed of the optical element in the first axis, wherein the controller is used for controlling the first speed to maintain a predetermined speed value during the marking procedure. The laser marking device according to claim 3, wherein the second speed is a moving speed of the workpiece along the second axis in the marking program. The laser marking device according to claim 4, wherein the optical element is scanned on the processing surface according to a scanning time, and the scanning time is dependent on a moving speed of the optical element along the first axis and a scanning delay Time to decide. The laser marking device according to claim 4, wherein the controller is further used for: Detecting a relationship change amount of the corresponding relationship between the first speed and the second speed; When the relationship change is greater than a preset first threshold value, it is determined whether to adjust the first speed to a third speed according to the relationship change, the mapping information, and the processing image file, so as to determine whether to adjust the first speed. The second speed is a fourth speed, and the opening and closing time information of the laser source is adjusted; and When the relationship change amount is greater than a preset second threshold value, a warning signal is generated and the marking procedure is stopped, wherein the second threshold value is greater than the first threshold value. The laser marking device as described in claim 1, further including: A beam adjuster is arranged between the laser source and the galvanometer to adjust the focus or defocus state of the laser beam, Wherein the beam adjuster moves along the transmission direction of the laser source, and the controller is further used for: A third speed of the beam adjuster is calculated according to the sum of the displacements of the laser beam in the first direction, the second direction, and a third direction in a unit time, wherein the first direction, the second direction The direction and the third direction belong to different dimensions; and The opening and closing time information of the laser source is calculated according to the second speed and the third speed. The laser marking device according to claim 7, wherein the controller is further used for: Calculating a relationship change between the second speed and the third speed; and When the relationship change is greater than a preset first threshold value, it is determined whether to adjust the third speed to a fourth speed according to the relationship change, the mapping information, and the processing image file, so as to determine whether to adjust the first speed. The second speed is a fifth speed, and the opening and closing time information of the laser source is adjusted; and When the relationship change amount is greater than a preset second threshold value, a warning signal is generated and the marking procedure is stopped, wherein the second threshold value is greater than the first threshold value. The laser marking device according to claim 1, wherein the marking image file and the workpiece image file are 2D image files or 3D image files.

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