Laser marking system and marking method

Abstract

The invention relates to a laser marking system and method and relates to the technical field of laser marking, the laser marking system comprises a feeding device and a marking device, the feeding device comprises a storage frame and a feeding table, the storage frame is used for storing trays, the feeding table is used for bearing the trays where to-be-marked parts can be installed, and the marking device comprises a marking table, a laser marking machine and a marking transfer assembly; the marking table comprises a marking base and a marking frame, the laser marking machine and the marking transfer assembly are arranged on the marking base, the marking transfer assembly is used for picking up a to-be-marked part on a tray at the marking frame and transferring the to-be-marked part to the laser marking machine, and the laser marking machine is used for marking the to-be-marked part grabbed by the marking transfer assembly. The material moving device has a moving stroke among the material storage frame, the feeding table and the marking device and is used for moving the trays at the position of the material storage frame to the feeding table and moving the trays at the position of the feeding table to the marking device, and the control device is electrically connected with the marking device and the material moving device and is used for controlling the marking device and the material moving device to act.

Description

Technical Field

[0001] This application relates to the field of laser marking technology, and in particular to a laser marking system and marking method. Background Technology

[0002] Laser marking technology is a non-contact processing method that uses a high-energy-density laser beam to act on the surface of a workpiece, causing physical or chemical changes in the surface material to leave a permanent mark. With its advantages of high marking precision, high processing efficiency, durable marking, and environmental friendliness, laser marking technology has been widely used in industrial manufacturing fields such as electronic components, automotive parts, and medical devices. In actual production, laser marking technology is usually implemented using a laser marking system.

[0003] Currently, traditional laser marking systems mainly adopt a fixed structure. The process involves designing and manufacturing a dedicated fixture for the workpiece to be marked. The workpiece is manually positioned on the fixture, and then the laser marking machine marks the workpiece. In this system, the fixture corresponds one-to-one with the workpiece, and the workpiece's positioning and marking position are determined by the fixture's fixed structure. Material handling and clamping typically rely on manual operation: the operator places the workpiece on the fixture, positions the fixture at the marking station, and manually adjusts the workpiece's position after marking one side to mark other sides. Summary of the Invention

[0004] To address the problems of low modularity, inconvenient maintenance and replacement, low automation, high tooling design, processing and maintenance costs, high labor costs, and low marking efficiency caused by the fixed structure and reliance on special tooling fixtures of laser marking systems, this application provides a laser marking system.

[0005] Firstly, the laser marking system provided in this application adopts the following technical solution: A laser marking system, the laser marking system comprising: The feeding device includes a storage rack and a loading platform. The storage rack is used to store pallets, and the loading platform is used to support pallets that can be used to install parts to be marked. A marking device includes a marking table, a laser marking machine, and a marking transfer assembly. The marking table includes a marking base and a marking frame. The marking frame is used to support a tray containing parts to be marked. The laser marking machine and the marking transfer assembly are located on the marking base. The marking transfer assembly is used to pick up the parts to be marked from the tray at the marking frame and transfer them to the laser marking machine. The laser marking machine is used to mark the parts to be marked picked up by the marking transfer assembly. A material transfer device, having a travel distance between the storage rack, the loading platform, and the marking device, for transferring a tray from the storage rack to the loading platform, and then transferring a tray from the loading platform to the marking device; and... A control device is electrically connected to the marking device and the material transfer device to control the operation of the marking device and the material transfer device.

[0006] Optionally, the marking and transfer assembly includes: Marking robotic arm; and, The marking clamping structure includes a marking clamping base, two marking clamping parts, and a marking drive structure. The marking clamping base is mounted on the marking robotic arm, and the two marking clamping parts are movably mounted on the marking clamping base for clamping the workpiece to be marked. The marking drive structure is driven to connect to the marking clamping parts so that the two marking clamping parts can clamp the workpiece to be marked.

[0007] Optionally, the marking transfer assembly further includes a first barcode scanner disposed on the marking clamp, for scanning the marked parts after marking is completed.

[0008] Optionally, the marking frame is provided with a plurality of marking positioning pins at intervals, for positioning in conjunction with a plurality of mating holes correspondingly provided on the tray; and / or, The marking frame is equipped with a first photoelectric sensor to detect whether the tray is on the marking frame.

[0009] Optionally, the marking device further includes a vision camera disposed on the marking table, the vision camera being used to photograph the marked workpiece; and / or, The marking device also includes a sampling inspection table and a sampling inspection grating. The sampling inspection table is used to place the marked parts after marking, and the sampling inspection grating is set corresponding to the sampling inspection table to detect whether an inspector has picked up the marked parts.

[0010] Optionally, the loading platform includes a loading frame, a loading seat, and a loading drive structure. The loading seat is movably mounted on the loading frame. During its travel, the loading seat has a loading position and a moving position. In the loading position, the part to be marked can be placed on the tray. In the moving position, the moving device can pick up the tray. The loading drive structure is located on the loading frame and is drivenly connected to the loading seat.

[0011] Optionally, the loading seat is provided with a plurality of loading positioning pins at intervals, for engaging with a plurality of mating holes correspondingly provided on the tray for positioning; and / or, The feeding rack is provided with two second photoelectric sensors at intervals. The two second photoelectric sensors are respectively located at the feeding position and the material transfer position. The feeding base is provided with a through hole that allows the light beam of the second photoelectric sensor to pass through. The feeding rack has two feeding stops at both ends, which are used to abut against the feeding seat.

[0012] Optionally, the transfer device includes: A material handling robotic arm, movable horizontally; and, The material transfer clamping structure includes a material transfer base, two material transfer clamping parts, and a material transfer drive structure. The material transfer base is mounted on the material transfer robotic arm, and the two material transfer clamping parts are movably mounted on the material transfer base to clamp the tray.

[0013] Optionally, each of the aforementioned material transfer clamping portions is provided in a slot, the slot extending along the length direction of the material transfer clamping portion for accommodating the tray; the material transfer clamping portion is provided with a positioning protrusion for engaging with a mating groove on the tray for positioning; and / or, The material transfer clamping structure also includes a second barcode scanner located on the material transfer base for scanning the tray.

[0014] Secondly, the compliance method provided in this application adopts the following technical solution: A marking method for a laser marking system, the laser marking system comprising a feeding device, a marking device, and a transferring device, the feeding device comprising a storage rack and a loading platform, the marking device comprising a marking table, a laser marking machine, and a marking and transferring assembly, the marking method comprising: Material feeding steps: Control the material transfer device to move the empty pallet at the storage rack to the loading platform for material feeding, and move the pallet carrying the parts to be marked to the marking platform; Marking steps: When the marking and conveying component moves the part to be marked to the laser marking machine, the laser marking machine is controlled to mark the part to be marked. Attached Figure Description

[0015] Figure 1 This is a top view of an embodiment of the laser marking system provided in this application; Figure 2 yes Figure 1 A three-dimensional structural diagram of the laser marking system in the image; Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 4 yes Figure 1 A three-dimensional structural diagram of the marking device in the diagram; Figure 5 yes Figure 4 A three-dimensional structural diagram of the marking and transfer component in the process; Figure 6 yes Figure 4 A three-dimensional structural diagram of the marking table in the diagram; Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle; Figure 8 yes Figure 1 A three-dimensional structural diagram of the loading platform in the middle; Figure 9 yes Figure 1 A three-dimensional structural diagram of the material handling clamping structure of the material handling device in the middle; Figure 10 yes Figure 1 A three-dimensional structural diagram of the tray in the image; Figure 11 yes Figure 1 A side view of the tray structure; Figure 12 This is a schematic diagram of the first process of the marking method provided in this application.

[0016] Explanation of reference numerals in the attached figures: 100. Laser marking system; 1. Feeding device; 11. Storage rack; 12. Loading platform; 121. Loading rack; 122. Loading seat; 1221. Through hole; 123. Loading drive structure; 124. Loading positioning pin; 125. Second photoelectric sensor; 126. Loading stop; 2. Marking device; 21. Marking table; 211. Marking seat; 212. Marking frame; 2121. Marking positioning pin; 2122. First photoelectric sensor; 22. Laser marking machine; 23. Marking transfer assembly; 231. Marking robotic arm; 232. Marking clamping structure; 2321. Marking clamping seat; 2322. Marking clamping part; 2322a. First marking clamping section; 2322b. 2322c, Third marking clamping section; 2322d, Avoidance slope; 2323, Marking drive structure; 2324, First barcode scanner; 24, Vision camera; 251, Sampling inspection table; 252, Sampling inspection grating; 3, Material transfer device; 31, Material transfer robotic arm; 32, Material transfer clamping structure; 321, Material transfer seat; 322, Material transfer clamping part; 3221, Slot; 3222, Positioning protrusion; 323, Material transfer drive structure; 324, Second barcode scanner; 4, Tray; 41, Mounting slot; 411, First mounting end; 412, Second mounting end; 42, Weight reduction hole; 43, Identification code; 44, Mating slot; 45, Mating hole; 46, Support part; 5, Marking component. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 -Appendix Figure 12This application will be described in further detail below.

[0018] Please see Figure 1 and Figure 2 A laser marking system 100 includes a feeding device 1, a marking device 2, and a transfer device 3. The feeding device 1 includes a storage rack 11 and a loading platform 12. The storage rack 11 is used to store a tray 4, and the loading platform 12 is used to support the tray 4, which can accommodate parts 5 to be marked. The marking device 2 includes a marking table 21, a laser marking machine 22, and a marking transfer assembly 23. The marking table 21 includes a marking base 211 and a marking frame 212. The marking frame 212 is used to support the tray 4 containing parts 5 to be marked. The laser marking machine 22 and the marking transfer assembly 23 are located on the marking base 211. The marking and transfer assembly 23 is used to pick up the part 5 to be marked on the tray 4 at the marking frame 212 and transfer it to the laser marking machine 22. The laser marking machine 22 is used to mark the part 5 to be marked picked up by the marking and transfer assembly 23. The material transfer device 3 has a travel between the storage rack 11, the loading platform 12 and the marking device 2, and is used to transfer the tray 4 at the storage rack 11 to the loading platform 12 and then transfer the tray 4 at the loading platform 12 to the marking device 2. The control device is electrically connected to the marking device 2 and the material transfer device 3 to control the operation of the marking device 2 and the material transfer device 3.

[0019] It should be noted that the storage rack 11 is used for centralized storage of pallets 4. It can adopt a multi-layer frame structure or a vertical silo structure to achieve orderly stacking of multiple pallets 4. Furthermore, the stored pallets 4 can be empty pallets 4 without any items to be marked 5, or pallets 4 carrying marked items 5. The loading platform 12 is used to support the pallets 4 for mounting the items to be marked 5. Its platform can be set as a platform structure or a platform with a guide and limiting structure, so that the operator or automatic loading mechanism can accurately place the items to be marked 5 on the pallets 4. The marking device 2 includes a marking table 21, a laser marking machine 22, and a marking transfer assembly 23. The marking table 21 consists of a marking base 211 and a marking frame 212. The marking base 211 serves as a basic support platform for mounting and fixing the laser marking machine 22 and the marking transfer assembly 23. The marking frame 212 is used to support a tray 4 containing the parts to be marked 5. The marking frame 212 can be made of welded metal sheet or profile structure, possessing sufficient rigidity and flatness. The laser marking machine 22 can be a fiber laser marking machine 22, a CO2 laser marking machine 22, or an ultraviolet laser marking machine 22, etc., and the embodiments of this application do not limit this. The marking transfer assembly 23 is used to pick up the parts to be marked 5 from the tray 4 at the marking frame 212 and transfer them to the laser marking machine 22, so that the laser marking machine 22 marks the parts to be marked 5 picked up by the marking transfer assembly 23. The material transfer device 3 has a travel distance between the storage rack 11, the loading platform 12, and the marking device 2, enabling the automatic transfer of the pallet 4 between the three workstations. The control device is electrically connected to the marking device 2 and the material transfer device 3 to coordinate and control the timing of the actions of each device.

[0020] It should also be noted that the feeding device 1 separates the storage rack 11 and the loading platform 12 into two independent functional units. The storage rack 11 is dedicated to the centralized storage of the pallets 4, while the loading platform 12 is dedicated to the assembly of the parts to be marked 5 with the pallets 4. The two are functionally decoupled, allowing the storage and loading processes to be carried out independently without interference. The transfer device 3, through its travel between the storage rack 11, the loading platform 12, and the marking device 2, automatically transfers the empty pallets 4 from the storage rack 11 to the loading platform 12 for the operator to load. After loading, it automatically transfers the pallets 4 carrying the parts to be marked 5 to the marking frame 212 of the marking device 2. The entire pallet 4 transfer process does not require manual handling, thus eliminating the tedious operation of operators repeatedly moving tooling fixtures and workpieces between multiple workstations in the traditional solution. The marking and transfer assembly 23 picks up the part 5 to be marked from the tray 4 on the marking frame 212 and transfers it to the laser marking machine 22. The laser marking machine 22 marks the part 5 in the grasped state of the marking and transfer assembly 23. Since the part 5 is in the grasped state of the marking and transfer assembly 23, the marking and transfer assembly 23 can flexibly adjust the spatial posture and orientation angle of the part 5 according to the marking requirements, so that the laser marking machine 22 can mark different surfaces and different positions of the part 5, without the need to design special tooling fixtures for each marking position or manually adjust the workpiece position as in traditional solutions. The control device coordinates the action sequence of the marking device 2 and the transfer device 3 through electrical connection, ensuring orderly connection and efficient cooperation between the modules.

[0021] In this embodiment, four functional modules are formed by independently configured feeding device 1, marking device 2, transferring device 3, and control device. Each module has a clear division of labor. When a module malfunctions or needs upgrading, it can be repaired or replaced individually without affecting the normal operation of other modules, which can significantly reduce the maintenance difficulty and cost of the system. The transferring device 3 automatically completes the transfer of the tray 4 between the storage rack 11, the loading platform 12, and the marking device 2, eliminating manual handling and effectively reducing labor input, which helps to improve overall work efficiency. The marking and transferring component 23 grasps the part to be marked 5 and flexibly adjusts its posture to cooperate with the laser marking machine 22 to complete multi-face and multi-position marking operations. This helps to get rid of the dependence on special tooling fixtures, which can save the cost of designing and processing special tooling fixtures for each product, and also avoid repeated disassembly and manual adjustment caused by the tooling fixtures not being able to complete all marking surfaces at once. This helps to reduce tooling and labor costs, and at the same time improves the production flexibility of the system, enabling it to quickly adapt to the production needs of multiple varieties and variable batches.

[0022] In one embodiment of this application, please refer to Figure 4 and Figure 5The marking transfer assembly 23 includes a marking robotic arm 231 and a marking clamping structure 232. The marking clamping structure 232 includes a marking clamping base 2321, two marking clamping parts 2322, and a marking drive structure 2323. The marking clamping base 2321 is mounted on the marking robotic arm 231, and the two marking clamping parts 2322 are movably mounted on the marking clamping base 2321 to clamp the workpiece 5 to be marked. The marking drive structure 2323 drives the marking clamping parts 2322 so that the two marking clamping parts 2322 can clamp the workpiece 5 to be marked.

[0023] It should be noted that the marking robotic arm 231, as a motion actuator, can be a multi-axis industrial robotic arm, such as a six-axis robotic arm, possessing multi-degree-of-freedom spatial motion capabilities, enabling flexible spatial movement and posture adjustment between the marking frame 212 and the laser marking machine 22. The marking clamping structure 232 includes a marking clamping base 2321, two marking clamping parts 2322, and a marking drive structure 2323. The marking clamping base 2321 is mounted on the end effector of the marking robotic arm 231, serving as the mounting base for the marking clamping parts 2322 and the marking drive structure 2323. The marking clamping base 2321 can be made of aluminum alloy or stainless steel, balancing structural strength and lightweight requirements. The two marking clamping parts 2322 are movably mounted on the marking clamping... The base 2321 is used to clamp the part 5 to be marked. The marking clamping part 2322 can move linearly along the guide structure set on the marking clamping base 2321, thereby realizing the clamping and releasing action of the part 5 to be marked. The marking drive structure 2323 drives the marking clamping part 2322, and can adopt the driving method of cylinder, electric push rod or servo motor with lead screw, so that the two marking clamping parts 2322 can move towards each other or away from each other, to complete the reliable clamping and releasing of the part 5 to be marked. Furthermore, the marking robot arm 231, through its multi-degree-of-freedom motion capability, can drive the marking clamping structure 232 to perform translation and rotation in three-dimensional space, thereby accurately moving the marking clamping structure 232 to the top of the marking frame 212 to pick up the part 5 to be marked, and then transfer it to the marking station of the laser marking machine 22. During the picking process, the marking drive structure 2323 drives the two marking clamping parts 2322 to move towards each other, applying clamping force from both sides of the workpiece 5 to be marked, and firmly clamping the workpiece 5 between the two marking clamping parts 2322. After clamping, the marking robotic arm 231 moves the marking clamping structure 232 and the workpiece 5 to be marked to the laser marking machine 22. According to the specific position and orientation of the surface to be marked on the workpiece 5, the angle of each joint of the marking robotic arm 231 is adjusted to change the posture of the workpiece 5 in space, so that the surface to be marked is facing the laser emission port of the laser marking machine 22, and the laser marking machine 22 can then mark the surface. After marking one surface, the marking robotic arm 231 can continue to adjust the posture of the workpiece 5 to be marked, turning the next surface to be marked to the position facing the laser emission port, realizing continuous multi-face marking of the same workpiece 5 without having to loosen the clamps for re-clamping. The symmetrical clamping method of the two marking clamping parts 2322 ensures that the clamping force is evenly distributed on both sides of the part to be marked 5, which not only ensures the stability of the clamping, but also avoids the part to be marked 5 from shifting or being damaged on the surface due to uneven clamping force.

[0024] In this embodiment, a marking robotic arm 231 is provided to adapt to the needs of different product shapes and marking positions, eliminating the need for dedicated tooling fixtures for each product. This helps reduce tooling design, processing, and maintenance costs. The marking drive structure 2323 in the marking clamping structure 232 drives the two marking clamping parts 2322, ensuring the speed and reliability of the clamping action. This allows the part to be marked 5 to maintain a stable position and posture throughout the entire transfer and marking process, thereby ensuring the accuracy and quality of the marking. Thus, the marking robotic arm 231 and the marking clamping structure 232 work together to enable the part to be marked 5 to be automatically transferred between the marking frame 212 and the laser marking machine 22, and the flexible adjustment of the posture of the part to be marked 5 during the marking process. This allows the system to complete the marking operation on all marking surfaces of the part to be marked 5 in a single clamping state, eliminating the need for multiple manual disassembly and reassembly and adjustment of the workpiece position in traditional solutions. This significantly improves marking efficiency and reduces labor costs.

[0025] It is understandable that the laser marking machine 22 typically marks an identification code 43 on the workpiece 5 to be marked during the marking process, in order to identify the workpiece 5. Based on this, in this embodiment, the marking transfer assembly 23 further includes a first barcode scanner 2324 disposed on the marking clamp 2321, used to scan the marked workpiece 5 after marking. Specifically, after the marking transfer assembly 23 completes the marking operation on the workpiece 5, the scanning window of the first barcode scanner 2324 is aligned with the area of ​​the identification code 43 that the laser marking machine 22 just marked on the workpiece 5, and the identification code 43 can be scanned and read to verify the correctness and readability of the marking content. Thus, by setting up the first barcode scanner 2324, the marking transfer component 23 can promptly scan and verify the identification code 43 on the marked part 5 after marking is completed, enabling real-time online detection of marking quality. Any marking abnormalities can be addressed promptly, preventing defective products from flowing into subsequent processes, thereby improving the quality controllability and traceability of the marking operation. It is understood that the first barcode scanner 2324 can be of various types, such as a QR code scanner or a barcode scanner, and the embodiments of this application do not limit this.

[0026] In one embodiment of this application, please refer to [the following text is missing]. Figure 5The marking clamping part 2322 includes a first marking clamping section 2322a, a second marking clamping section 2322b, and a third marking clamping section 2322c. The first marking clamping section 2322a extends along the length direction of the marking table 21 and is driven to connect with the marking drive structure 2323. The second marking clamping section 2322b extends along the width direction of the marking table 21. The third marking clamping section 2322c connects the first marking clamping section 2322a and the second marking clamping section 2322b and extends along the thickness direction of the marking table 21. An avoidance slope 2322d is formed at the connection between the second marking clamping section 2322b and the third marking clamping section 2322c. The first marking clamping section 2322a extends along the length direction to receive the driving force of the marking drive structure 2323, the third marking clamping section 2322c extends along the thickness direction to provide the necessary height difference, and the second marking clamping section 2322b extends along the width direction to form a horizontal clamping surface that contacts the part to be marked 5. This three-section layout allows the two marking clamping parts 2322 to extend horizontally from both sides of the part to be marked 5 and clamp it. At the same time, the height setting of the third marking clamping section 2322c allows the second marking clamping section 2322b to avoid the edge structure of the tray 4 and smoothly extend into the tray 4 to pick up the part to be marked 5. The avoidance slope 2322d at the connection between the second marking clamping section 2322b and the third marking clamping section 2322c serves to guide and avoid interference with the edges of the tray 4 and the corners of the marking part 5 when the marking clamping part 2322 enters the tray 4 to pick up the item to be marked 5 or to put the item back. This prevents the marking clamping part 2322 from interfering with or colliding with the tray 4 or the item to be marked 5 during movement, and also reduces the weight of the marking clamping part 2322. Thus, the marking clamping part 2322 adopts a three-section structure, which allows it to reliably clamp the item to be marked 5 in a limited space while avoiding interference from the tray 4 and other surrounding structures. This helps to improve the operational flexibility and applicability of the marking transfer assembly 23 in complex spatial environments. By setting the avoidance slope 2322d, the weight of the marking clamping part 2322 can be reduced, and the risk of the marking clamping part 2322 colliding with the pallet 4 or workpiece during the picking up and putting back the part to be marked 5 can be further reduced, reducing the probability of operation interruption due to interference, thereby helping to improve the overall operation stability and operation efficiency of the system.

[0027] In one embodiment of this application, please refer to Figure 6 and Figure 7The marking frame 212 is provided with multiple marking positioning pins 2121 at intervals, which are used to engage with multiple mating holes 45 on the tray 4 for positioning. When the material transfer device 3 places the tray 4 carrying the part to be marked 5 onto the marking frame 212, the tray 4 aligns with the multiple marking positioning pins 2121 protruding on the marking frame 212 through the multiple mating holes 45 on its lower surface during the descent. Each marking positioning pin 2121 is inserted into its corresponding mating hole 45. The precise fit between the pin holes constrains the position and rotation of the tray 4 in the horizontal plane, so that the tray 4 obtains a unique and definite planar position and angular posture on the marking frame 212. The interval distribution of the multiple marking positioning pins 2121 forms a multi-point positioning constraint. Compared with single-point or two-point positioning, multi-point positioning can effectively improve the stability and anti-interference ability of positioning, and prevent the tray 4 from shifting or rotating due to external forces or mechanical vibrations during the marking process. Thus, by setting multiple marking positioning pins 2121, which can cooperate with the corresponding mating holes 45, the tray 4 can achieve high-precision repeatability positioning on the marking frame 212. This ensures that the position and posture of the tray 4 on the marking frame 212 remain consistent each time it is placed, thereby guaranteeing a high degree of repeatability in the spatial positional relationship between each part 5 to be marked on the tray 4 and the laser marking machine 22. This provides a reliable positioning reference for the marking transfer component 23 to accurately pick up the part 5 to be marked and for the laser marking machine 22 to accurately mark it, effectively improving the accuracy and consistency of the marking position. At the same time, the multi-point spacing helps to enhance the positioning rigidity and stability of the tray 4 on the marking frame 212, ensuring that the tray 4 always remains in the predetermined position during the marking operation, avoiding adverse effects on the marking quality caused by positional changes due to vibration or external forces.

[0028] In one embodiment of this application, please refer to [the following text is missing]. Figure 6 and Figure 7The marking frame 212 is equipped with a first photoelectric sensor 2122 to detect whether there is a tray 4 on the marking frame 212. When a tray 4 is placed on the marking frame 212, the tray 4 blocks or reflects the detection beam of the first photoelectric sensor 2122, causing the sensor to output a material presence signal and transmit it to the control device. The control device determines that a tray 4 is in place on the marking frame 212, thereby allowing the marking transfer component 23 to perform subsequent picking and marking actions. When there is no tray 4 on the marking frame 212, the detection beam of the first photoelectric sensor 2122 is not blocked or reflected, and the sensor outputs a material absence signal. The control device determines that there is no tray 4 on the marking frame 212, and then controls the material transfer device 3 to transfer the tray 4 carrying the parts to be marked 5 from the loading table 12 to the marking frame 212 for replenishment, or to pause the picking action of the marking transfer component 23 to avoid empty grabbing. Thus, by setting the first photoelectric sensor 2122, the presence or absence of the tray 4 on the marking frame 212 can be automatically detected in real time. This allows the control device to automatically coordinate the action sequence of the material transfer device 3 and the marking transfer component 23 based on the detection results. This avoids invalid picking actions of the marking transfer component 23 when there is no tray 4 on the marking frame 212, and also avoids repeated placement actions of the material transfer device 3 when there is already a tray 4 on the marking frame 212. This ensures the accuracy and orderliness of the action connection between the various devices.

[0029] In one embodiment of this application, please refer to Figure 4The marking device 2 also includes a vision camera 24 mounted on the marking table 21, which is used to photograph the part 5 to be marked. During the marking operation, after the marking transfer component 23 picks up the part 5 to be marked from the tray 4 on the marking frame 212, the marking robotic arm 231 first moves the marking clamping structure 232 to transfer the part 5 to be marked into the field of view of the vision camera 24, rather than directly to the laser marking machine 22. The vision camera 24 photographs the part 5 to be marked in the gripping state of the marking clamping structure 232, acquiring positional image information of the part 5 relative to the marking clamping part 2322 and transmitting it to the control device. The control device processes and analyzes the acquired images, extracting feature information such as the actual gripping position, offset, and attitude angle of the part 5 in the marking clamping structure 232, and compares this feature information with a preset standard gripping position template to determine whether the gripping position of the part 5 is within the allowable deviation range. When the comparison result shows that the deviation between the actual gripping position of the part to be marked 5 and the standard gripping position is within the allowable range, the control device determines that the gripping position is correct and allows the marking robot arm 231 to continue to transfer the part to be marked 5 to the laser marking machine 22 to perform the marking operation. At the same time, the control device can fine-tune and compensate the marking coordinate parameters of the laser marking machine 22 according to the detected actual deviation to ensure that the laser marking position falls accurately on the predetermined area on the part to be marked 5. When the comparison result shows that the deviation exceeds the allowable range, the control device determines that the gripping position is abnormal. It can control the marking transfer component 23 to put the part to be marked 5 back to the tray 4 for re-picking, or control the marking robot arm 231 to adjust the gripping posture and perform visual inspection again until the gripping position meets the requirements before entering the marking stage. Thus, by setting up a vision camera 24 to detect and confirm the gripping position of the part 5 to be marked before marking, the system can automatically check the actual gripping state of the part 5 in the marking clamping structure 232 before laser marking is performed. This ensures that marking is only performed if the gripping position is correct, thereby avoiding quality problems such as marking position deviation, misaligned marking content, or even missed marking caused by gripping position deviation. This helps to improve the accuracy of the marking position and the marking qualification rate of the product. It is understood that there are various types of vision cameras 24, including industrial CCD cameras and CMOS cameras, and the embodiments of this application do not limit this.

[0030] In one embodiment of this application, please refer to Figure 1 , Figure 3 and Figure 4The marking device 2 also includes a sampling table 251 and a sampling grating 252. The sampling table 251 is used to place the marked parts 5 after marking. The sampling grating 252 is set corresponding to the sampling table 251 to detect whether an inspector has picked up the marked parts 5. During the marking operation, when the control device determines that a marked part 5 needs to be manually inspected or the first barcode scanner 2324 cannot recognize the identification code 43 according to the preset sampling rules, the control marking transfer component 23 is controlled to transfer the marked part 5 from the laser marking machine 22 to the sampling table 251 for placement. Before the inspector reaches the sampling table 251, when he reaches through the light curtain detection surface of the sampling grating 252 to pick up the marked part 5, the beam of the sampling grating 252 is blocked. At this time, the marking device 2 stops operating. After the inspector picks up the marked part 5 and pulls it out, the beam is unblocked, and the marking device 2 continues to operate.

[0031] In this embodiment, by setting up the sampling inspection station 251 and the sampling inspection grating 252, a dedicated workstation for manual sampling and an automatic sensing mechanism can be provided for the system. This allows the manual sampling inspection process to be seamlessly integrated with the automated marking process, meeting the requirements for manual sampling inspection in product quality management while ensuring the safety of manual sampling inspection. Simultaneously, the sampling inspection grating 252 can automatically detect the actions of the inspection personnel, enabling the control device to automatically determine the start and end of the sampling inspection without requiring manual input of sampling status information. This reduces the complexity of human-machine interaction, improves the efficiency of automated integration of the sampling inspection process, and allows for automatic recording and archiving by the control device, thus providing complete sampling inspection data support for product quality traceability.

[0032] In one embodiment of this application, please refer to Figure 1 and Figure 8 The loading platform 12 includes a loading frame 121, a loading seat 122, and a loading drive structure 123. The loading seat 122 is movably mounted on the loading frame 121. During its movement, the loading seat 122 has a loading position and a moving position. In the loading position, the part to be marked 5 can be placed on the tray 4. In the moving position, the moving device 3 can pick up the tray 4. The loading drive structure 123 is located on the loading frame 121 and is drivenly connected to the loading seat 122.

[0033] Understandably, when the loading seat 122 is in the loading position, it moves to a position closer to the operator, allowing the operator to easily place the parts 5 to be marked one by one onto the corresponding mounting positions of the trays 4 on the loading seat 122, completing the loading operation. At this time, the loading seat 122 is away from the range of motion of the transfer device 3, and the operator's workspace will not intersect with the movement trajectory of the transfer device 3, which helps to ensure operational safety. After loading is completed, the loading drive structure 123 drives the loading seat 122 to slide from the loading position to the transfer position along the guide structure on the loading frame 121. The loading seat 122 moves to a position closer to the transfer device 3, at which point the transfer device 3 can pick up the trays 4 containing the parts 5 to be marked from above or the side and transfer them to the marking frame 212 of the marking device 2.

[0034] In this embodiment, the material platform is configured with two working positions: a loading position and a transferring position. This spatial separation between the manual loading area and the picking area of ​​the transferring device 3 prevents operators from entering the movement range of the transferring device 3 during loading operations, effectively preventing cross-interference between human and machine working spaces and improving operational safety. Simultaneously, the loading drive structure 123 drives the loading seat 122 to automatically reciprocate between the two positions, allowing the tray 4, after loading, to be automatically delivered to the picking position of the transferring device 3. This eliminates the need for manual handling by operators, reducing manual operation steps and improving the efficiency of the loading-to-transfer transition.

[0035] Further, please refer to Figure 1 and Figure 2 Two loading platforms 12 are spaced apart so that when the transfer device 3 picks up the pallet 4 on one loading platform 12, the operator can load the material on the other loading platform 12, which can save the waiting time of the transfer device 3 and thus help improve the loading efficiency.

[0036] In one embodiment of this application, the loading seat 122 is provided with a plurality of loading positioning pins 124 at intervals, which are used to engage with a plurality of mating holes 45 correspondingly provided on the pallet 4 for positioning. When the empty pallet 4 is transferred from the storage rack 11 to the loading seat 122 via the transfer device 3, during the placement process, each mating hole 45 on the pallet 4 respectively engages with the corresponding loading positioning pin 124 on the loading seat 122. Through the engagement relationship between the loading positioning pin 124 and the mating hole 45, positional and angular constraints are applied to the pallet 4 in the horizontal plane, so that the pallet 4 obtains a definite placement position and posture on the loading seat 122. In this way, the positioning of the pallet 4 on the loading seat 122 is ensured by the engagement of the loading positioning pin 124 and the mating hole 45, so that when the operator places the part to be labeled 5 at the loading position, the pallet 4 is always in a definite reference position, thereby ensuring the consistency and accuracy of the installation position of the part to be labeled 5 on the pallet 4. Meanwhile, the spaced distribution of multiple loading positioning pins 124 provides stable multi-point support positioning, preventing the pallet 4 from sliding or shifting during the loading process due to uneven force applied by the operator or external vibration, thus further ensuring the positioning stability of the loading process.

[0037] In one embodiment of this application, please refer to Figure 8The feeding rack 121 is equipped with two second photoelectric sensors 125 spaced apart. The two second photoelectric sensors 125 are respectively located at the feeding position and the material transfer position. The feeding seat 122 is provided with a through hole 1221 that allows the light beam of the second photoelectric sensor 125 to pass through. When the feeding seat 122 slides to the feeding position, the through hole 1221 on the feeding seat 122 moves exactly to the detection area of ​​the second photoelectric sensor 125 at the feeding position. The light beam of the second photoelectric sensor 125 can pass through the through hole 1221. At this time, the sensor detects the light beam passing through and outputs a position signal to the control device. Based on this, the control device determines that the feeding seat 122 has reached the feeding position and can perform the feeding operation or control the feeding drive structure 123 to stop moving. Similarly, when the loading seat 122 slides to the transfer position, the through hole 1221 on the loading seat 122 moves to the detection area of ​​the second photoelectric sensor 125 at the transfer position. The sensor detects the light beam passing through the through hole 1221 and outputs a positioning signal. Based on this, the control device determines that the loading seat 122 has reached the transfer position and then controls the transfer device 3 to perform the action of picking up the tray 4. When the loading seat 122 is in the transition area between the loading position and the transfer position, the through hole 1221 is not aligned with any of the second photoelectric sensors 125, and the sensor beam is blocked by the solid part of the loading seat 122. The sensor outputs a non-positioning signal, and the control device determines that the loading seat 122 is still in motion. Thus, by setting two second photoelectric sensors 125, the precise automatic detection of the position status of the loading seat 122 in both the loading and transferring positions can be achieved. This allows the control device to monitor the current position status of the loading seat 122 in real time and automatically coordinate the start / stop control of the loading drive structure 123 and the triggering timing of the transferring device 3, ensuring that subsequent operations are only performed after the loading seat 122 has reached its designated position. This avoids positioning deviations or mechanism collisions caused by triggering subsequent operations before the loading seat 122 has reached its designated position. Furthermore, by providing a through hole 1221 to cooperate with the second photoelectric sensor 125, the movement of the loading seat 122 itself can change the sensor's detection state, eliminating the need for an additional signal triggering mechanism and helping to reduce the system's structural complexity and cost.

[0038] In one embodiment of this application, please refer to [the following text is missing]. Figure 8The loading rack 121 has two loading stops 126 at both ends, which abut against the loading seat 122. When the loading drive structure 123 drives the loading seat 122 to move towards the loading position, the loading seat 122 contacts and abuts against the corresponding loading stop 126 at the loading position. The loading stop 126 applies a mechanical blocking force to the loading seat 122, restricting the loading seat 122 from continuing to move forward, so that the loading seat 122 stops precisely at the loading position, preventing the loading seat 122 from exceeding the preset loading position due to driving inertia or excessive driving. Similarly, when the loading seat 122 moves towards the transfer position, it abuts against the loading stop 126 at the other end at the transfer position and is restricted to the transfer position. If the loading stop 126 adopts a rubber buffer block or a combined buffer structure, the rubber material undergoes elastic deformation when the loading seat 122 contacts the loading stop 126, absorbing the impact energy of the loading seat 122's movement and allowing the loading seat 122 to decelerate and stop smoothly. Thus, by setting two loading stops 126, reliable mechanical limit protection can be provided for the movement stroke of the loading seat 122 at the loading and transferring positions, ensuring that the loading seat 122 will not exceed the preset range of motion, causing structural damage or safety accidents. The contact between the loading stop 126 and the loading seat 122 provides a deterministic position stop point. Combined with the arrival detection of the second photoelectric sensor 125, a dual position protection mechanism is formed, with both electrical signal detection from the sensor and physical limitation by the mechanical stop, further improving the reliability and safety of the loading seat 122's positioning.

[0039] In one embodiment of this application, please refer to Figure 1 , Figure 2 and Figure 9The material transfer device 3 includes a material transfer robotic arm 31 and a material transfer clamping structure 32. The material transfer robotic arm 31 is movably arranged in the horizontal direction. The material transfer clamping structure 32 includes a material transfer seat 321, two material transfer clamping parts 322 and a material transfer drive structure 323. The material transfer seat 321 is installed on the material transfer robotic arm 31, and the two material transfer clamping parts 322 are movably installed on the material transfer seat 321 to clamp the tray 4. When the material transfer robotic arm 31 moves the material transfer clamping structure 32 horizontally to the storage rack 11, the material transfer robotic arm 31 descends so that the material transfer clamping structure 32 reaches the clamping height of the pallet 4 inside the storage rack 11. The material transfer drive structure 323 drives the two material transfer clamping parts 322 to move towards each other so as to clamp the pallet 4 from both sides. Then, the material transfer robotic arm 31 rises to lift the pallet 4 out of the storage rack 11 and moves it horizontally to the top of the loading seat 122 of the loading platform 12. The material transfer robotic arm 31 descends to place the pallet 4 on the loading seat 122. The material transfer drive structure 323 drives the two material transfer clamping parts 322 to move in opposite directions to release the pallet 4, thus completing the transfer of the pallet 4 from the storage rack 11 to the loading platform 12. After the loading is completed, the loading seat 122 moves to the transfer position, and the transfer robot arm 31 moves again above the transfer position, clamping the pallet 4 carrying the part to be marked 5 according to the same process and transferring it to the marking frame 212 of the marking device 2. In this way, the transfer device 3, through the horizontal movement of the transfer robot arm 31 and the clamping action of the transfer clamping structure 32, enables the pallet 4 to automatically flow between the storage rack 11, the loading table 12 and the marking device 2, replacing the heavy labor of manually handling the pallet 4 and tooling fixtures in the traditional solution, which can significantly reduce labor costs and labor intensity. The horizontal setting of the transfer robot arm 31 makes its movement trajectory simple and clear, and can accurately place the pallet 4 in the predetermined position of each station, ensuring the positional accuracy of the pallet 4 during the transfer process. Meanwhile, the two material transfer clamping parts 322 symmetrically clamp the two sides of the tray 4, so that the tray 4 is subjected to balanced and stable force during the transfer process, and is not easy to tilt, flip or shift position, thus ensuring the safety and position retention of the tray 4 and the marking parts 5 on it during the transfer process.

[0040] In one embodiment of this application, please refer to [the following text is missing]. Figure 9Each material transfer clamping part 322 is provided in a slot 3221, which extends along the length of the material transfer clamping part 322 to accommodate the tray 4. The material transfer clamping part 322 is provided with a positioning protrusion 3222 to cooperate with the mating groove 44 on the tray 4 for positioning. When the material transfer drive structure 323 drives the two material transfer clamping parts 322 to move towards each other to clamp the tray 4, the two side edges of the tray 4 slide into the slots 3221 inside the two material transfer clamping parts 322 respectively. The groove walls of the slots 3221 constrain the tray 4 from the upper and lower sides of the edge, forming a vertical limiting effect on the tray 4 and preventing the tray 4 from falling downward from between the material transfer clamping parts 322 during the lifting and transfer process. Simultaneously, the positioning protrusion 3222 on the material transfer clamping part 322 embeds into the corresponding mating groove 44 on the side of the pallet 4 during clamping. The mating relationship between the positioning protrusion 3222 and the mating groove 44 precisely constrains the position of the pallet 4 along the length direction of the material transfer clamping part 322, preventing the pallet 4 from sliding or shifting along the length direction within the slot 3221. Thus, by setting the slot 3221, the clamping contact area between the material transfer clamping part 322 and the pallet 4 is significantly increased, changing from point or line contact to surface contact. This helps improve the stability of the clamping and the pallet 4's anti-drop capability, ensuring that the pallet 4 will not fall off even if subjected to vibration or acceleration / deceleration impacts during transfer, thereby ensuring the safety and reliability of the transfer process. Furthermore, through the positioning of the positioning protrusion 3222 and the mating groove 44, the pallet 4 obtains precise positional constraints along the clamping direction and length direction after being clamped by the material transfer clamping structure 32, thereby ensuring the placement accuracy of the pallet 4 after it is transferred to the target workstation.

[0041] In one embodiment of this application, please refer to Figure 9The material transfer clamping structure 32 also includes a second barcode scanner 324 located on the material transfer base 321 for scanning the tray 4. When the material transfer clamping structure 32 clamps the tray 4, the second barcode scanner 324 scans and reads the identification code 43 on the tray 4 to obtain the unique identification information of the tray 4, and transmits this information to the control device. Based on the identification information of the tray 4, the control device can query and retrieve the workpiece information, marking parameter information, and product model information corresponding to the tray 4. Thus, after the tray 4 is transferred to the marking device 2, the laser marking machine 22 can automatically call the marking program and parameters that match the workpiece 5 to be marked on the tray 4 for marking, without the need for manual selection and setting of marking parameters. At the same time, the control device binds and records the tray 4 identification with the information of the batch of workpieces 5 to be marked, establishing a complete information link from the tray 4 to the workpiece, from loading to marking. Thus, by setting up a second barcode scanner 324, the information of the pallet 4 can be automatically collected and identified during the material transfer process. This allows the control device to obtain the identity information and associated workpiece parameter information of the pallet 4 before it enters the marking process. This provides a data basis for the automatic matching of parameters in the subsequent marking process, helps to eliminate the need for manual selection and input of marking parameters, avoids errors in marking parameters caused by human operation, and thus helps to improve the accuracy and efficiency of marking parameter settings.

[0042] In one embodiment of this application, please refer to Figure 10 The tray 4 is provided with a mounting groove 41, which has a first mounting end 411 and a second mounting end 412. The width of the first mounting end 411 is smaller than the width of the second mounting end 412. A weight-reducing hole 42 is provided through the bottom of the mounting groove 41. The unequal width of the first mounting end 411 being smaller than the width of the second mounting end 412 makes the mounting groove 41 directional. When installing, the part to be marked 5 can only be placed in the mounting groove 41 according to a specific direction and orientation to ensure that its outer contour matches the inner contour of the mounting groove 41 perfectly. This achieves a unique constraint on the installation direction of the part to be marked 5, providing a foolproof and error-proof positioning effect and preventing operators from installing the part to be marked 5 in the wrong direction or misaligned during loading. The weight-reducing hole 42 at the bottom of the mounting groove 41 can reduce the material volume of the tray 4 in the area of ​​the mounting groove 41. Meanwhile, by setting the weight reduction hole 42, the overall weight of the pallet 4 can be effectively reduced, the load on the transfer device 3 when handling the pallet 4 can be reduced, which is conducive to the use of a smaller power drive element in the transfer robot arm 31, reducing energy consumption and equipment costs, and also helps to reduce inertial impact during the transfer process.

[0043] In one embodiment of this application, please refer to Figure 10 and Figure 11The tray 4 is equipped with an identification code 43 for scanning. The tray 4 has mating grooves 44 on opposite sides to mate with the positioning protrusions 3222 of the transfer device 3. The tray 4 has multiple mating holes 45. The lower end of the tray 4 has multiple support parts 46. The multiple support parts 46 are spaced apart along the circumference of the tray 4 and are made of elastic material.

[0044] Understandably, by setting the identification code 43, each barcode scanner can quickly read the unique number and associated information of the pallet 4 when scanning it at different stages. The control device then automatically identifies the pallet 4 and retrieves the workpiece information, completing the binding and tracking of the pallet 4 and workpiece information throughout the marking process. By setting the mating groove 44, it can engage with the positioning protrusion 3222 on the material transfer clamping part 322, achieving precise positioning of the pallet 4 along the clamping direction during material transfer, preventing the pallet 4 from shifting or deviating during clamping and transfer, and ensuring the placement accuracy of the pallet 4 after it is transferred to each station. By setting multiple mating holes 45, when the pallet 4 is placed on the loading seat 122 or the marking frame 212, it can engage with the corresponding loading positioning pin 124 or marking positioning pin 2121, achieving high-precision repeatable positioning of the pallet 4 at each station, ensuring that the spatial position of the workpiece 5 to be marked relative to the marking equipment remains highly consistent in each clamping operation. Multiple support parts 46 are spaced apart on the bottom surface of the pallet 4 along the circumference of the pallet 4. When the pallet 4 is placed on each bearing surface, the support parts 46 contact the bearing surface and bear the weight of the pallet 4 and the workpiece. Since the support parts 46 are made of elastic material, they undergo elastic deformation during contact to absorb the impact of placement and provide a buffering effect. At the same time, the elastic material has a high coefficient of friction, which increases the friction between the bottom surface of the pallet 4 and the bearing surface, preventing the pallet 4 from sliding on the bearing surface.

[0045] Based on the above structure, this application also provides a marking method for the laser marking system 100. Please refer to [link to relevant documentation]. Figure 12 , Figure 12 This is a schematic diagram of the first process of the marking method provided in this application.

[0046] In one embodiment of this application, the laser marking system 100 includes a feeding device 1, a marking device 2, and a transferring device 3. The feeding device 1 includes a storage rack 11 and a loading platform 12. The marking device 2 includes a marking table 21, a laser marking machine 22, and a marking and transferring assembly 23. The marking method includes: S10: Feeding steps: Control the material transfer device 3 to move the empty pallet 4 at the storage rack 11 to the loading platform 12 for feeding, and move the pallet 4 carrying the parts to be marked 5 to the marking platform 21; S20: Marking step: When the marking transfer component 23 transfers the part 5 to be marked to the laser marking machine 22, control the laser marking machine 22 to mark the part 5.

[0047] In this embodiment, during the feeding step, the transfer device 3 first automatically removes an empty pallet 4 from the storage rack 11 and transfers it to the loading platform 12. After the operator places the part to be marked 5 at the loading position, the transfer device 3 automatically transfers the pallet 4 carrying the part to be marked 5 to the marking device 2. The entire pallet 4 transfer process is automatically executed by the transfer device 3, eliminating the need for the operator to move the pallet between multiple workstations. The operator only needs to place the part to be marked 5 at a fixed loading position. During the marking step, after the marking transfer component 23 picks up the part to be marked 5 from the pallet 4, it can flexibly adjust the spatial posture of the part to be marked 5 under the drive of the marking robotic arm 231, so that different surfaces to be marked are sequentially facing the laser marking machine 22 for marking. This achieves continuous marking of the same part 5 on multiple sides and at multiple positions, without the need to loosen the clamps for re-clamping or manually adjust the workpiece position. Thus, through the orderly coordination of the material supply and marking steps, the entire process from supplying the empty pallet 4, loading the parts to be marked 5, to transferring the pallet 4 to the laser marking station can be automated. This significantly reduces manual operation and labor time, improving the overall efficiency of the marking operation. The material transfer device 3 automatically moves the pallet 4 between various workstations, eliminating the heavy labor of manually handling tooling fixtures and workpieces in traditional solutions, thus reducing labor intensity and labor costs. The marking and transfer component 23 flexibly adjusts the posture of the parts to be marked 5 during the marking process, enabling multi-face marking. This helps to reduce reliance on specialized tooling fixtures and manual adjustments, lowering tooling costs and improving production flexibility.

[0048] In one embodiment of this application, the marking device 2 further includes a vision camera 24. Before the marking step, the marking method of the marking transfer component 23 further includes a positioning inspection step, which includes: S31: When the marking and transfer component 23 transfers the part to be marked 5 to the vision camera 24, it controls the vision camera 24 to capture an image of the part to be marked 5 and determine the marking position information, wherein the marking position information includes the normal marking information of the part to be marked 5 that needs to be marked. S32: When the marking position information is normal marking information, proceed to the marking step.

[0049] In this embodiment, after the marking and transfer component 23 picks up the part 5 to be marked from the tray 4 and before transferring it to the laser marking machine 22 for marking, the marking robotic arm 231 first transfers the part 5 to be marked to the field of view of the vision camera 24, which then captures image information of the part 5. The control device processes and analyzes the captured images to determine whether the position and orientation of the part 5 to be marked in the marking clamping structure 232 are correct, and determines the precise coordinates of each marking area on the part 5. The control device summarizes the analysis results into marking position information. When the marking position information indicates that the position of the part 5 to be marked meets the marking requirements (i.e., normal marking information), the control device allows the marking and transfer component 23 to continue transferring the part 5 to the laser marking machine 22 to perform the marking step. When the marking position information indicates that the part 5 to be marked has an abnormal position or posture, the control device can issue an alarm prompt and control the marking transfer component 23 to return the part 5 to the tray 4 or place it in the non-conforming product collection area, thus avoiding invalid marking of non-conforming parts. In this way, by setting a positioning inspection step, an automated visual inspection step can be added before the marking step, enabling the system to fully and automatically check and confirm the state of the part 5 to be marked before marking, ensuring that marking is only performed on parts 5 that meet the conditions. This avoids poor marking quality caused by positional deviations of the part 5, helping to improve the pass rate and consistency of marking. At the same time, this inspection step is completely completed automatically by the vision camera 24 and the control device, without the need for manual visual inspection and judgment. This helps to eliminate the subjectivity and inconsistency of manual inspection, making the inspection process more objective, efficient, and reliable, without significantly extending the automated production cycle time, thus achieving a balance between quality assurance and production efficiency.

[0050] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser marking system, characterized in that, include: The feeding device (1) includes a storage rack (11) and a loading platform (12). The storage rack (11) is used to store the tray (4), and the loading platform (12) is used to support the tray (4) that can be used to install the parts to be marked (5). The marking device (2) includes a marking table (21), a laser marking machine (22), and a marking transfer assembly (23). The marking table (21) includes a marking base (211) and a marking frame (212). The marking frame (212) is used to carry a tray (4) containing a part to be marked (5). The laser marking machine (22) and the marking transfer assembly (23) are located on the marking base (211). The marking transfer assembly (23) is used to pick up the part to be marked (5) on the tray (4) at the marking frame (212) and transfer it to the laser marking machine (22). The laser marking machine (22) is used to mark the part to be marked (5) picked up by the marking transfer assembly (23). The material transfer device (3) has a travel between the storage rack (11), the loading platform (12), and the marking device (2) for transferring the tray (4) at the storage rack (11) to the loading platform (12) and transferring the tray (4) at the loading platform (12) to the marking device (2); and, A control device is electrically connected to the marking device (2) and the material transfer device (3) to control the operation of the marking device (2) and the material transfer device (3).

2. The laser marking system according to claim 1, characterized in that, The marking and transfer assembly (23) includes: Marking robotic arm (231); and, The marking clamping structure (232) includes a marking clamping base (2321), two marking clamping parts (2322), and a marking drive structure (2323). The marking clamping base (2321) is mounted on the marking robotic arm (231). The two marking clamping parts (2322) are movably mounted on the marking clamping base (2321) for clamping the workpiece (5) to be marked. The marking drive structure (2323) drives the marking clamping parts (2322) so that the two marking clamping parts (2322) can clamp the workpiece (5) to be marked.

3. The laser marking system according to claim 2, characterized in that, The marking transfer assembly (23) also includes a first barcode scanner (2324) disposed on the marking holder (2321) for scanning the marked part (5) after marking is completed.

4. The laser marking system according to claim 1, characterized in that, The marking frame (212) is provided with a plurality of marking positioning pins (2121) at intervals, for positioning in conjunction with a plurality of mating holes (45) correspondingly provided on the tray (4); and / or, The marking frame (212) is equipped with a first photoelectric sensor (2122) to detect whether the tray (4) is on the marking frame (212).

5. The laser marking system according to claim 1, characterized in that, The marking device (2) further includes a vision camera (24) disposed on the marking table (21), the vision camera (24) being used to photograph the marked part (5); and / or, The marking device (2) further includes a sampling table (251) and a sampling grating (252). The sampling table (251) is used to place the marked parts (5) after marking. The sampling grating (252) is set in relation to the sampling table (251) to detect whether an inspector has picked up the marked parts (5).

6. The laser marking system according to claim 1, characterized in that, The loading platform (12) includes a loading rack (121), a loading seat (122), and a loading drive structure (123). The loading seat (122) is movably mounted on the loading rack (121). During its movement, the loading seat (122) has a loading position and a moving position. In the loading position, the part to be labeled (5) can be placed on the tray (4). In the moving position, the moving device (3) can pick up the tray (4). The loading drive structure (123) is located on the loading rack (121) and is drivenly connected to the loading seat (122).

7. The laser marking system according to claim 6, characterized in that, The loading seat (122) is provided with a plurality of loading positioning pins (124) at intervals, for positioning in conjunction with a plurality of mating holes (45) correspondingly provided on the tray (4); and / or, The feeding rack (121) is provided with two second photoelectric sensors (125) spaced apart. The two second photoelectric sensors (125) are respectively located at the feeding position and the material transfer position. The feeding seat (122) is provided with a through hole (1221) that allows the light beam of the second photoelectric sensor (125) to pass through. The feeding rack (121) has two feeding stops (126) at both ends, which are used to abut against the feeding seat (122).

8. The laser marking system according to claim 1, characterized in that, The transfer device (3) includes: A material handling robotic arm (31) is configured to move horizontally; and, The material transfer clamping structure (32) includes a material transfer base (321), two material transfer clamping parts (322) and a material transfer drive structure (323). The material transfer base (321) is mounted on the material transfer robotic arm (31), and the two material transfer clamping parts (322) are movably mounted on the material transfer base (321) to clamp the tray (4).

9. The laser marking system according to claim 8, characterized in that, Each of the aforementioned material transfer clamping parts (322) is provided in a slot (3221), the slot (3221) extending along the length direction of the material transfer clamping part (322) for accommodating the tray (4), the material transfer clamping part (322) is provided with a positioning protrusion (3222) for engaging with the mating groove (44) on the tray (4) for positioning; and / or, The material transfer clamping structure (32) also includes a second barcode scanner (324) disposed on the material transfer base (321) for scanning the tray (4).

10. A marking method for a laser marking system according to any one of claims 1 to 9, characterized in that, The laser marking system includes a feeding device (1), a marking device (2), and a transferring device (3). The feeding device (1) includes a storage rack (11) and a loading platform (12). The marking device (2) includes a marking table (21), a laser marking machine (22), and a marking and transferring assembly (23). The marking method includes: Material feeding steps: Control the material transfer device (3) to move the empty pallet (4) at the storage rack (11) to the loading platform (12) for material feeding, and move the pallet (4) carrying the parts to be marked (5) to the marking platform (21); Marking steps: When the marking transfer component (23) transfers the part to be marked (5) to the laser marking machine (22), the laser marking machine (22) is controlled to mark the part to be marked (5).

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