A laser-marking guard, machine assembly and laser-marking method

Abstract

The present application relates to a kind of laser marking protection device, machine components and laser marking method, comprising: laser marking equipment, the outside of laser marking equipment is fixed with suction device;Soldering dross protection plate, soldering dross protection plate is fixed to suction device, and soldering dross protection plate is used to cover VIN code marking area of vehicle body.Due to the setting of soldering dross protection plate, VIN code marking area can be covered when vehicle body is welded, soldering dross protection plate protects VIN code marking area in the process of vehicle body welding, and soldering dross generated in the process of welding will not pollute VIN code marking area, VIN code can also effectively reduce the situation that marking character is not clear when subsequent marking, suction device can suction soldering dross protection plate, can reduce the step of manual placing and taking soldering dross protection plate, therefore, by setting suction device and soldering dross protection plate, soldering dross generated in the process of vehicle body welding can be effectively prevented from polluting VIN code marking area, and the step of manual placing and taking soldering dross protection plate can be reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle VIN code engraving technology, and in particular to a protective device, machine component, and laser engraving method for laser engraving. Background Technology

[0002] The VIN code on a vehicle is its unique identification code, and the clarity of the VIN code engraving must meet very strict requirements. With the popularization of new energy vehicles and the increasing demand from customers for vehicle body safety and strength, high-strength steel plates and hot-formed steel plates are being used more and more widely in vehicle bodies. Traditional mechanical scribing marking equipment cannot be used on high-strength steel exceeding 1100MPa or hot-formed steel. Laser marking technology has emerged and has been adopted by automobile manufacturers.

[0003] In related technologies, current laser engraving equipment is generally fully automated to ensure the consistency, clarity and depth of the engraved VIN characters to guarantee engraving quality. VIN engraving can be performed on the vehicle body sub-assemblies after engraving and production in a specified order, or it can be performed after receiving the corresponding information after the vehicle body assembly is produced.

[0004] However, the welding process on the car body generates a large number of sparks and spatter, which can cause varying degrees of contamination to the VIN code stamping area, resulting in unclear VIN characters that fail to meet the required standards. Summary of the Invention

[0005] This invention provides a protective device, machine component, and laser engraving method for laser engraving, in order to solve the problem in related technologies that a large number of sparks and spatters are generated during the welding process of the car body, which will cause varying degrees of contamination to the VIN code engraving area, resulting in unclear VIN engraving characters and failure to meet the specified requirements.

[0006] In a first aspect, a protective device for laser marking is provided, comprising: a laser marking device, wherein an adsorption device is fixedly provided on the outer side of the laser marking device; a slag protection plate, wherein the slag protection plate is adsorbed and fixed to the adsorption device, and the slag protection plate is used to cover the VIN code marking area of ​​the vehicle body.

[0007] In some embodiments, the laser marking equipment includes: a frame, with a marking section on one side of the frame, the marking section and the adsorption device being disposed on adjacent or opposite sides of the frame; a dust suction pipe, fixed to one side of the frame, one end of the dust suction pipe extending to the bottom of the frame and connected to a dust suction port, the dust suction port facing the welding slag protection plate; and a controller, fixed to the frame, electrically connected to the marking section, the controller being used to control the marking section to perform VIN code marking.

[0008] In some embodiments, the adsorption device includes at least one magnetic element that is magnetically fixed to the weld slag protection plate.

[0009] In some embodiments, the magnetic suction component includes: a cylinder having a cavity, an upper air port and a lower air port arranged on the side of the cylinder, the upper air port and the lower air port communicating with the cavity; a piston having a magnetic ring connected to its bottom, the piston and the magnetic ring being disposed together within the cavity, and a sealing ring being fixed to the side wall of the piston abutting against the side wall of the cylinder; the piston and the sealing ring dividing the cavity into an upper chamber and a lower chamber, the upper air port being disposed in the upper chamber and the lower air port being disposed in the lower chamber.

[0010] In some embodiments, a sensing unit is provided on the side of the magnetic attractor away from the laser marking device, and the laser marking device and the sensing unit are located on opposite sides of the magnetic attractor; the sensing unit is used to sense the magnetic attractor's attraction to the weld slag protection plate.

[0011] In some embodiments, at least one powerful magnet is provided on the side of the slag protection plate away from the adsorption device.

[0012] In some embodiments, the protective device further includes: a connecting bracket, the connecting bracket including a first vertical plate and a first horizontal plate perpendicular to the first vertical plate, a second vertical plate connected to the side of the first horizontal plate away from the first vertical plate, the first vertical plate and the second vertical plate being arranged parallel to each other and extending in opposite directions, a second horizontal plate parallel to the first horizontal plate connected to the side of the second vertical plate away from the first horizontal plate, and the second horizontal plate extending in a direction away from the laser marking device; the first vertical plate being fixed to the laser marking device, the adsorption device being fixed to the bottom of the first horizontal plate, and a sensing part being fixed to the second horizontal plate.

[0013] Secondly, a marking machine assembly is provided, comprising: a robot; a laser marking device mounted on the robot, the laser marking device having a controller and a marking part, the controller being electrically connected to the marking part, the controller being used to control the marking part to perform VIN code marking, an adsorption device being fixedly provided on the outer side of the laser marking device; and a welding slag protection plate, the welding slag protection plate being adsorbed and fixed to the adsorption device, and the welding slag protection plate being used to cover the VIN code marking area of ​​the vehicle body.

[0014] Thirdly, a method for laser marking on a vehicle is provided, comprising the following steps: during vehicle body welding production, a weld slag protective plate is placed over the VIN code marking area and the weld slag protective plate is fixed to the VIN code marking area; after the vehicle body welding production is completed, the vehicle body is transported to the marking station and precisely positioned; the weld slag protective plate is removed from the VIN code marking area using a laser marking device, and the VIN code marking area is marked using the laser marking device; after marking is completed, the vehicle body is transported to the adjustment line for recycling of the weld slag protective plate.

[0015] In some embodiments, the laser marking equipment is equipped with an adsorption device, which includes a cylinder, a piston, and a magnetic ring. The process of using the laser marking equipment to remove the weld slag protection plate from the VIN code marking area and then marking the VIN code marking area includes: moving the laser marking equipment to the VIN code marking area of ​​the vehicle body according to a set route; venting air into the cylinder to cause the piston within the cylinder to move the magnetic ring towards the bottom of the cylinder, thus lifting the weld slag protection plate; when a sensing unit on one side of the adsorption device detects that the adsorption device has lifted the weld slag protection plate, controlling the laser marking equipment to perform the marking action; and after marking is completed, controlling the laser marking equipment to retract the weld slag protection plate to a designated position within the vehicle body.

[0016] The beneficial effects of the technical solution provided by this invention include:

[0017] This invention provides a protective device, machine component, and laser engraving method for laser engraving. Because a slag protection plate is installed on the laser engraving equipment, it can cover the VIN code engraving area during vehicle body welding. During the welding process, the slag protection plate protects the VIN code engraving area, preventing slag from contaminating the VIN code engraving area. This also effectively reduces the likelihood of unclear characters during subsequent engraving. The adsorption device can adsorb the slag protection plate, reducing the need for manual removal of the plate. Therefore, by setting up the adsorption device and the slag protection plate, it is possible to effectively prevent slag generated during vehicle body welding from contaminating the VIN code engraving area and reduce the need for manual removal of the slag protection plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the structure of the protective device for laser engraving provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the adsorption device for adsorbing welding slag protective plate provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure of the connecting bracket and the adsorption device provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the welding slag protection plate provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the magnetic suction component provided in an embodiment of the present invention.

[0024] In the picture:

[0025] 1. Laser engraving equipment;

[0026] 11. Adsorption device; 111. Magnetic suction element; 112. Sensing unit; 1112. Upper air port; 1113. Lower air port; 1114. Piston; 1115. Magnetic ring; 1116. Sealing ring; 1117. Upper chamber; 1118. Lower chamber;

[0027] 12. Frame; 13. Engraving section; 14. Dust suction pipe; 141. Dust suction port; 16. Flange; 17. Controller;

[0028] 15. Connecting bracket; 151. First vertical plate; 152. First horizontal plate; 153. Second vertical plate; 154. Second horizontal plate;

[0029] 2. Weld slag protection plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0031] This invention provides a protective device for laser engraving, which can solve the problem in related technologies that a large number of sparks and spatters are generated during the welding process of the car body, which will cause varying degrees of contamination to the VIN code engraving area, resulting in unclear VIN engraving characters and failure to meet the specified requirements.

[0032] See Figure 1The diagram illustrates a protective device for laser marking provided in an embodiment of the present invention. It may include: a laser marking device 1, with an adsorption device 11 fixed to its outer side; and a slag protection plate 2, which is adsorbed and fixed to the adsorption device 11. In other words, the slag protection plate 2 can be indirectly fixed to the laser marking device 1 by the adsorption device 11 through adsorption. The slag protection plate 2 is used to cover the VIN code marking area of ​​the vehicle body. When the slag protection plate 2 is used to cover the VIN code marking area of ​​the vehicle body, it may not be fixed to the laser marking device 1 by the adsorption device 11; instead, the slag protection plate 2 alone covers the VIN code marking area of ​​the vehicle body. In other embodiments, the slag protection plate 2 may also be fixed to the laser marking device 1 by the adsorption device 11, and together with the laser marking device, it is fixed to the VIN code marking area, thus protecting the VIN code marking area of ​​the vehicle body.

[0033] See Figure 1As shown, in some optional embodiments, the laser marking device 1 may include: a frame 12, with a marking section 13 on one side of the frame 12. The marking section 13 and the adsorption device 11 are disposed on adjacent or opposite sides of the frame 12. The marking section 13 can be configured to mark the VIN code on the VIN code marking area of ​​the vehicle body. Since the side of the laser marking device 1 with the marking section 13 usually has more other structures in actual operation, the marking section 13 and the adsorption device 11 usually need to be disposed on different sides of the frame 12. In this embodiment, the marking section 13 and the adsorption device 11 are disposed on adjacent sides of the frame 12, which allows the adsorption device 11 to be disposed on adjacent sides of the frame 12 during subsequent marking operations. After the auxiliary device 11 adsorbs the welding slag protection plate 2, the laser marking equipment 1 can rotate a small angle to mark the VIN code using the marking part 13, making it more convenient and efficient. The suction pipe 14 is used to absorb the fumes generated during the marking process using the marking part 13. The suction pipe 14 is fixed to one side of the frame 12. The suction pipe 14, marking part 13, and adsorption device 11 can be fixed to different sides of the frame 12 respectively, ensuring that each part operates without interfering with the others. One end of the suction pipe 14 extends to the bottom of the frame 12 and is connected to a suction port 141. The suction port 141 is located at the bottom of the frame 12. When the engraving part 13 and the dust suction pipe 14 are located on different sides of the frame 12, they can also absorb fumes. The diameter of the dust suction port 141 can be the same as the inner diameter of the dust suction pipe 14, or it can be smaller or larger than the inner diameter of the dust suction pipe 14. The cross-section of the dust suction pipe 14 can have the same or different shapes as the cross-section of the dust suction port 141. In this embodiment, the dust suction port 141 is set as an open trapezoidal structure, and the cross-sectional area of ​​the dust suction port 141 gradually increases towards the side away from the dust suction pipe 14. This arrangement allows the dust suction port 141 to suck up more fumes. The dust suction port 141 can face the welding slag protection plate 2. In some other embodiments, the dust suction port... A flexible tube capable of bending 90 degrees can be connected to the side of the suction port 141 away from the suction pipe 14. The flexible tube can change the orientation of the port according to the VIN code engraving position to absorb the smoke and dust generated during VIN code engraving. The suction port 141 can also absorb some of the welding slag generated during the vehicle body welding process before VIN code engraving, so that the vicinity of the VIN code engraving area is kept relatively clean, further reducing the impact of impurities on the clarity of the VIN code; Controller 17, the controller 17 is fixed to the frame 12, the controller 17 is electrically connected to the engraving part 13, and the controller 17 is used to control the engraving part 13 to engrave the VIN code.In this embodiment, the controller 17 and the engraving unit 13 are electrically connected. When the controller 17 receives a signal that the engraving unit 13 has moved to the designated position, it can control the engraving unit 13 to engrave the VIN code.

[0034] In some optional embodiments, the adsorption device 11 includes at least one magnetic suction element 111, which is magnetically fixed to the weld slag protection plate 2. The weld slag protection plate 2 can be adsorbed and fixed by the magnetic suction element 111. In this case, the material used to make the weld slag protection plate 2 is also selected to be able to be attracted by the magnetic suction element 111. In this embodiment, the adsorption device 11 includes two magnetic suction elements 111, which are connected to the frame 12 and have the same height. When adsorbing the weld slag protection plate 2, the magnetic suction elements 111 work together to make the adsorption device 11 more firmly adsorb the weld slag protection plate 2. In other embodiments, the adsorption between the adsorption device 11 and the weld slag protection plate 2 can be achieved not only by magnetic attraction but also by using a suction cup or other methods.

[0035] See Figure 5 As shown, the magnetic suction component 111 may include: a cylinder body having a cavity, with an upper air port 1112 and a lower air port 1113 arranged on the side of the cylinder body, the upper air port 1112 and the lower air port 1113 communicating with the cavity, and both the upper air port 1112 and the lower air port 1113 being able to allow air to enter or exit; a piston 1114, with a magnetic ring 1115 connected to the bottom of the piston 1114, the piston 1114 and the magnetic ring 1115 being disposed together in the cavity, and a sealing ring 1116 fixed to the side wall of the piston 1114 abutting against the side wall of the cylinder body, when air enters through the upper air port 1112 and exits through the lower air port 1113, or when air exits through the upper air port 1112 and enters through the lower air port 1113, the position of the piston 1114 within the cylinder body can be changed. The piston 1114 is positioned within the cylinder body, and a sealing ring 1116 is provided on its side wall to abut against the side wall of the cylinder body, which can enhance the sealing of the abutment part. The piston 1114 and the sealing ring 1116 divide the cavity into an upper chamber 1117 and a lower chamber 1118. The upper air port 1112 is located in the upper chamber 1117, and the lower air port 1113 is located in the lower chamber 1118. In this embodiment, when the magnetic suction component 111 needs to attract the welding slag protection plate 2, the magnetic suction component 111 is vented, and at this time, the upper air port 1112 is the air inlet and the lower air port 1113 is the air outlet. When the magnetic suction component 111 needs to release the attraction of the welding slag protection plate 2, the lower air port 1113 is the air inlet and the upper air port 1112 is the air outlet. In other embodiments, the magnetic attractor 111 can also be configured as a magnet with a strong magnetic force, which attracts the slag protection plate 2 by bringing the magnet close to it, and then the slag protection plate 2 and the magnet are manually separated.

[0036] Preferably, a sensing unit 112 is provided on the side of the magnetic suction member 111 away from the laser engraving device 1. The laser engraving device 1 and the sensing unit 112 are located on opposite sides of the magnetic suction member 111. In some embodiments, the sensing unit 112 may also be located between the magnetic suction member 111 and the laser engraving device 1. In this embodiment, the sensing unit 112 may be provided with an indicator light for determining whether the sensing unit 112 is on or off. When the sensing unit 112 senses that the magnetic suction member 111 has attracted an object, the sensing unit 112 is turned on and the indicator light illuminates. When the sensing unit 112 does not sense that the magnetic suction member 111 has attracted an object, the indicator light remains off. Placing the sensing unit 112 on the side away from the laser engraving device 1 makes it easier for the operator to observe the changes in the indicator light. The sensing unit 112 is used to sense the magnetic suction member 111's attraction to an object. Regarding the absorption state of the welding slag protection plate 2, in this embodiment, the sensing unit 112 is configured as a metal proximity switch. At this time, the sensing position of the sensing unit 112 is at the bottom of the sensing unit 112. That is, when the magnetic suction member 111 adsorbs the welding slag protection plate 2, the sensing unit 112 can sense that the welding slag protection plate 2 is lifted. The bottom of the magnetic suction member 111 and the bottom of the sensing unit 112 have a height difference of 1-3mm. The bottom of the sensing unit 112 is higher than the bottom of the magnetic suction member 111. Within the height difference of 1-3mm, it does not affect the sensing unit 112's sensing of the welding slag protection plate 2. And because the bottom of the sensing unit 112 is higher than the bottom of the magnetic suction member 111, when the welding slag protection plate 2 is lifted, the welding slag protection plate 2 will not touch the sensing unit 112 and cause damage to the sensing unit 112. Preferably, the height difference between the bottom of the sensing unit 112 and the bottom of the magnetic suction member 111 is 2mm.

[0037] See Figure 4 As shown, in some optional embodiments, at least one strong magnet is provided on the side of the slag protection plate 2 away from the adsorption device 11, that is, at least one strong magnet can be provided at the bottom of the slag protection plate 2, so that the slag protection plate 2 can be tightly adsorbed to the VIN code engraving area by the strong magnet, and is not easy to fall off during the vehicle body welding process. In this embodiment, two φ12 strong magnets are provided at the bottom of the slag protection plate 2 to enhance the stability of the slag protection plate 2 covering the VIN code engraving area. The thickness of the slag protection plate 2 can be set to 1mm. In some other embodiments, the slag protection plate 2 can be provided with three, four or more strong magnets; the slag protection plate 2 can also be fixed to the VIN code engraving area by providing some clip plates on the surface of the slag protection plate 2, which can be fastened to the vehicle body to fix the slag protection plate 2 to the VIN code engraving area.

[0038] See Figure 2 and Figure 3As shown, preferably, the protective device further includes: a connecting bracket 15, the connecting bracket 15 including a first vertical plate 151 and a first horizontal plate 152 perpendicular to the first vertical plate 151, a second vertical plate 153 connected to the side of the first horizontal plate 152 away from the first vertical plate 151, the first vertical plate 151 and the second vertical plate 153 being arranged in parallel and extending in opposite directions, a second horizontal plate 154 parallel to the first horizontal plate 152 connected to the side of the second vertical plate 153 away from the first horizontal plate 152, and the second horizontal plate 154 extending in a direction away from the laser marking device 1. In this embodiment, the first vertical plate 151, the first horizontal plate 152, the second vertical plate 153 and the second horizontal plate 154 can be integrally bent to give it better durability; the first vertical plate 151 is fixed to the laser marking device 1, and the first vertical plate 151 can be... Multiple through holes are provided to fix the first vertical plate 151 to the laser engraving equipment 1 with screws. The adsorption device 11 is fixed to the bottom of the first horizontal plate 152. The adsorption device 11 can also be fixed to the first horizontal plate 152 with screws. The second horizontal plate 154 is fixed with a sensing part 112. That is, a second vertical plate 153 is provided between the adsorption device 11 and the sensing part 112. The sensing part 112 is provided in the second horizontal plate 154 by opening a through hole in the second horizontal plate 154 and passing the sensing part 112 through the through hole. Part of the sensing part 112 is located above the second horizontal plate 154 and part is located below the second horizontal plate 154. In this embodiment, the sensing part 112 and the adsorption device 11 are at similar heights in the vertical direction. In order to meet the joint action of the sensing part 112 and the adsorption device 11 on the welding slag protection plate 2, the height of the second horizontal plate 154 needs to be lower than the height of the first horizontal plate. In some other embodiments, when the heights of the sensing unit 112 and the adsorption device 11 are different, the height of the first horizontal plate 152 may be lower than that of the second horizontal plate 154 or the two may be the same. In this embodiment, two connecting brackets 15 are provided, so two adsorption devices 11 and two sensing units 112 are also provided, which can make the welding slag protection plate 2 more firmly adsorbed.

[0039] This invention also provides an engraving machine assembly, which may include: a robot; a laser engraving device 1, the laser engraving device 1 being mounted on the robot, wherein a flange 16 is provided on the laser engraving device 1 for connection with the robot, the laser engraving device 1 having a controller 17 and an engraving part 13, the controller 17 being electrically connected to the engraving part 13, the controller 17 being used to control the engraving part 13 to perform VIN code engraving, that is, after receiving a signal that the engraving part 13 has moved to the VIN code engraving area, the controller 17 can control the engraving part 13 to perform VIN code engraving, the robot can drive the laser engraving device 1 to move and... The laser marking device 1 is placed at a designated position near the VIN code marking area to mark the VIN code on the vehicle body using the marking part 13. The robot and the laser marking device 1 are connected by a flange 16. At this time, an external shaft can be provided at the part of the robot connected to the flange 16. When the external shaft of the robot rotates, it can drive the flange 16 to rotate, that is, the robot and the laser marking device 1 can rotate relative to each other, which facilitates the adjustment of the marking angle. An adsorption device 11 and a welding slag protection plate 2 are fixed on the outside of the laser marking device 1. The welding slag protection plate 2 is adsorbed and fixed to the adsorption device 11, and the welding slag protection plate 2 is used to cover the VIN code marking area of ​​the vehicle body.

[0040] In some optional embodiments, a vehicle laser engraving method may include the following steps: During vehicle body welding production, a weld slag protection plate 2 is placed over the VIN code engraving area and fixed to the VIN code engraving area. The weld slag protection plate 2 protects the VIN code engraving area during vehicle body welding production, preventing weld slag from contaminating the VIN code engraving area and preventing unclear engraving of the VIN code in subsequent stages. After vehicle body welding is completed, the vehicle body is transported to the engraving station and precisely positioned to facilitate subsequent VIN code engraving. At this time, a detection signal indicating the vehicle body's position is fed back to the PLC, which then calls a robot to move the laser engraving device 1 to the vicinity of the VIN code engraving area. The laser engraving device 1 removes the weld slag protection plate 2 from the VIN code engraving area. Laser engraving of the vehicle body's VIN code can be harmful to the human body. Using the laser engraving device 1 to remove the weld slag protection plate 2 reduces the number of times workers need to enter the engraving station. The laser engraving device 1 then engraves the VIN code area. After the weld slag protection plate 2 is removed, the VIN code engraving area is exposed, and engraving can begin. After engraving, the vehicle body is moved to the adjustment line for the recovery of the weld slag protection plate 2. The recovery process includes the laser engraving device 1 placing the weld slag protection plate 2 back into the designated position on the vehicle body. The vehicle body is then moved to the adjustment line, where workers manually remove the weld slag protection plate 2 from the vehicle body, allowing for its reuse.

[0041] In this embodiment, the laser marking equipment 1 is equipped with an adsorption device 11, which includes a cylinder, a piston 1114, and a magnetic ring 1115. The process of using the laser marking equipment 1 to remove the weld slag protection plate 2 from the VIN code marking area and to mark the VIN code marking area includes: moving the laser marking equipment 1 to the VIN code marking area of ​​the vehicle body according to a set route; at this time, a robot can be used to move the laser marking equipment 1 to the VIN code marking area of ​​the vehicle body according to a set program, and the robot sends a signal to the PLC that the laser marking equipment 1 has arrived; subsequently, by controlling the solenoid valve to ventilate the cylinder, the piston 1114 in the cylinder drives the magnetic ring 1115 to move towards the bottom of the cylinder, thus picking up the weld slag protection plate 2; the sensing unit 112 is then set as a metal proximity switch. When the sensor on one side of the adsorption device 11... After the sensor 112 detects that the adsorption device 11 has picked up the welding slag protection plate 2, the metal proximity switch sends an OK signal to the PLC. The PLC then controls the robot to move the laser marking device 1 to the vicinity of the VIN code marking area (to perform the marking action). In other words, the robot uses its robotic arm to lift the laser marking device 1 and move it to the VIN code marking area on the vehicle body. It then sends a signal indicating that the device is in position to the PLC. After receiving the signal indicating that the laser marking device 1 is in position, the PLC sends an instruction to the controller 17 in the laser marking device 1. After receiving the signal, the controller 17 controls the marking unit 13 to perform the marking. After marking is completed, the PLC receives the marking completion instruction and sends an instruction to the robot. The robot then controls the laser marking device 1 to retrieve the welding slag protection plate 2 to the designated position inside the vehicle body. After the welding slag protection plate 2 is returned to the vehicle body, all detection signals are cleared, completing the entire operation.

[0042] This invention provides a protective device, machine component, and laser engraving method for laser engraving. Because a slag protection plate 2 is installed to cover the VIN code engraving area during vehicle body welding, the slag protection plate 2 protects the VIN code engraving area during the welding process, preventing slag generated during vehicle body welding from contaminating the VIN code engraving area. This effectively reduces the likelihood of unclear characters during subsequent engraving. Furthermore, a PLC is used to control a robot, enabling the robot to drive the laser engraving equipment 1 to engrave the VIN code on the vehicle body. An adsorption device 11 can then pick up the slag protection plate 2, reducing the need for manual removal of the plate and protecting workers. Therefore, by incorporating the adsorption device 11 and the slag protection plate 2 into the laser engraving equipment 1, contamination of the VIN code engraving area by slag generated during vehicle body welding can be effectively prevented. Moreover, after the vehicle body is transported to the engraving station and precisely positioned, the laser engraving equipment 1 is used for engraving, effectively ensuring the engraving quality.

[0043] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0044] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for laser marking on vehicles, characterized in that, A protective device for laser engraving is used, wherein the protective device for laser engraving includes: Laser marking equipment (1), wherein an adsorption device (11) is fixedly provided on the outside of the laser marking equipment (1). Welding slag protection plate (2), the welding slag protection plate (2) is adsorbed and fixed to the adsorption device (11), and the welding slag protection plate (2) is used to cover the VIN code engraving area of ​​the vehicle body; The laser engraving equipment (1) includes: The frame (12) has an engraving part (13) on one side, and the engraving part (13) and the adsorption device (11) are arranged on adjacent or opposite sides of the frame (12); A suction pipe (14) is fixed to one side of the frame (12). One end of the suction pipe (14) extends to the bottom of the frame (12) and is connected to a suction port (141). The suction port (141) faces the welding slag protection plate (2). The controller (17) is fixed to the frame (12) and electrically connected to the engraving part (13). The controller (17) is used to control the engraving part (13) to engrave the VIN code. The adsorption device (11) includes at least one magnetic suction element (111), which is magnetically fixed to the welding slag protection plate (2); A sensing part (112) is provided on the side of the magnetic suction member (1) away from the laser marking device (1), and the laser marking device (1) and the sensing part (112) are provided on opposite sides of the magnetic suction member (111); The sensing unit (112) is used to sense the absorption state of the magnetic suction component (111) on the welding slag protection plate (2); The protective device also includes: A connecting bracket (15) includes a first vertical plate (151) and a first horizontal plate (152) perpendicular to the first vertical plate (151). A second vertical plate (153) is connected to the side of the first horizontal plate (152) away from the first vertical plate (151). The first vertical plate (151) and the second vertical plate (153) are arranged in parallel and extend in opposite directions. A second horizontal plate (154) parallel to the first horizontal plate (152) is connected to the side of the second vertical plate (153) away from the first horizontal plate (152). The second horizontal plate (154) extends in a direction away from the laser engraving device (1). The first vertical plate (151) is fixed to the laser engraving device (1), the adsorption device (11) is fixed to the bottom of the first horizontal plate (152), and the second horizontal plate (154) is fixed with a sensing part (112). The bottom of the magnetic attractor (111) and the bottom of the sensing part (112) have a height difference of 1 to 3 mm; The vehicle laser marking method includes the following steps: During the vehicle body welding production, a slag protection plate (2) is placed over the VIN code marking area and the slag protection plate (2) is fixed to the VIN code marking area; After the vehicle body welding is completed, the vehicle body is moved to the engraving station and precisely positioned. The welding slag protection plate (2) is removed from the VIN code marking area using a laser marking device (1), and the VIN code marking area is marked using the laser marking device (1). After the engraving is completed, the vehicle body is moved to the adjustment line for the recycling of the welding slag protection plate (2).

2. The vehicle laser marking method as described in claim 1, characterized in that, The magnetic attractor (111) includes: The cylinder body has a cavity inside, and an upper air port (1112) and a lower air port (1113) are arranged on the side of the cylinder body. The upper air port (1112) and the lower air port (1113) are connected to the cavity. A piston (1114) is provided with a magnetic ring (1115) connected to its bottom. The piston (1114) and the magnetic ring (1115) are disposed together in the cavity, and a sealing ring (1116) is fixedly provided on the side wall of the piston (1114) to abut against the side wall of the cylinder. The piston (1114) and the sealing ring (1116) divide the cavity into an upper chamber (1117) and a lower chamber (1118). The upper air port (1112) is located in the upper chamber (1117), and the lower air port (1113) is located in the lower chamber (1118).

3. The vehicle laser marking method as described in claim 1, characterized in that: At least one strong magnet is provided on the side of the slag protection plate (2) away from the adsorption device (11).

4. The vehicle laser marking method as described in claim 1, characterized in that, The laser engraving equipment (1) is equipped with an adsorption device (11), which includes a cylinder, a piston (1114) and a magnetic ring (1115). The process of using a laser marking device (1) to remove the weld slag protection plate (2) from the VIN code marking area and using the laser marking device (1) to mark the VIN code marking area includes: The laser marking device (1) is moved to the VIN code marking area of ​​the vehicle body according to the set route; Air is introduced into the cylinder, causing the piston (1114) in the cylinder to drive the magnetic ring (1115) to move towards the bottom of the cylinder, thereby picking up the welding slag protection plate (2). When the sensing part (112) on one side of the adsorption device (11) senses that the adsorption device (11) has picked up the welding slag protection plate (2), it controls the laser marking device (1) to perform the marking action. After the engraving is completed, the laser engraving equipment (1) is controlled to retrieve the welding slag protection plate (2) to the designated position inside the vehicle body.

5. A marking machine assembly, for implementing the vehicle laser marking method as described in claim 1, characterized in that, It includes: robot; A laser marking device (1) is installed on the robot. The laser marking device (1) has a controller (17) and a marking part (13). The controller (17) is electrically connected to the marking part (13). The controller (17) is used to control the marking part (13) to perform VIN code marking. An adsorption device (11) is fixed on the outside of the laser marking device (1). Welding slag protection plate (2), which is adsorbed and fixed to the adsorption device (11), and the welding slag protection plate (2) is used to cover the VIN code engraving area of ​​the vehicle body.

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