An automatic laser engraving device for the inner cavity of a flat panel shell

Abstract

This utility model belongs to the field of laser engraving technology, and particularly relates to an automatic laser engraving device for the inner cavity of a flat panel shell. The automatic laser engraving device for the inner cavity of a flat panel shell includes a loading station, a laser engraving station, and a unloading station. The laser engraving station includes a laser engraving platform, multiple laser engraving machines, a positioning fixture positioned below each laser engraving machine, a PPU transfer robot positioned on one side of the positioning fixture, a transfer frame positioned at the output end of the PPU transfer robot, and multiple sets of loading suction nozzles. Each cycle of the PPU transfer robot can transfer the shell product from the loading tray at the loading station to the positioning fixture at the front laser station, transfer the shell product in the positioning fixture at the previous laser station to the positioning fixture at the next laser station, and transfer the shell product in the positioning fixture at the end laser station to the unloading suction nozzle at the unloading station. This utility model can achieve automated loading, positioning, laser engraving, and unloading of shell products with high production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of laser engraving technology, and in particular relates to an automatic laser engraving device for the inner cavity of a flat panel shell. Background Technology

[0002] In the manufacturing process of metal casings for products such as laptops and tablets, internal cavity laser engraving is a crucial and demanding process. The numerous locations requiring laser engraving within the internal cavity present challenges to both efficiency and precision.

[0003] Current laser engraving technology typically employs manual laser engraving for such internal cavity laser engraving needs. Traditional laser engraving production lines usually operate on a single workstation basis, meaning that one workstation completes the entire internal cavity laser engraving in a single operation. Typically, the operator removes the product from the tray, places it on the laser engraving positioning fixture, starts the laser engraving machine, completes the engraving, and then places the product back onto the tray. Because the laser engraving time for a single product is relatively long, one person can operate multiple laser engraving machines.

[0004] This method of operation has low processing efficiency and high manual labor intensity. Because it is difficult to reasonably arrange the laser engraving cycle of multiple laser engraving machines, there may be some shell products that have been laser engraved but have not been removed, or some laser engraving machines may be idle and not engraving, or all laser engraving machines may be engraving while personnel are waiting. It is difficult to meet the laser engraving process of large batch shell products. In addition, this method of operation cannot eliminate laser engraving defects caused by human factors and cannot achieve automated multi-station connection. Utility Model Content

[0005] To address the technical problems existing in the prior art, this application provides an automated laser engraving equipment for the inner cavity of a flat shell that can achieve automated feeding, positioning, laser engraving, and unloading of shell products with high production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatic laser engraving device for the inner cavity of a flat panel shell includes:

[0008] Feeding station: includes a feeding platform and a feeding tray installed on the feeding platform;

[0009] Laser engraving station: includes a laser engraving platform, multiple laser engraving machines arranged sequentially on the laser engraving platform, a positioning fixture arranged below each laser engraving machine, a PPU transplanting robot arranged on one side of the positioning fixture, a transplanting frame arranged at the output end of the PPU transplanting robot, and multiple sets of feeding nozzles fixedly connected to the transplanting frame, wherein the number of sets of feeding nozzles is one more than the number of positioning fixtures;

[0010] Unloading station: includes an unloading conveying mechanism, an unloading frame fixedly connected to the frame of the unloading conveying mechanism, an unloading rotary cylinder fixedly connected to the unloading frame, a rotating frame fixedly connected to the rotating end of the unloading rotary cylinder, and an unloading suction nozzle fixedly connected to the rotating frame;

[0011] Each cycle of the PPU transfer robot can transfer the shell product from the loading tray at the loading station to the positioning fixture at the front laser station, transfer the shell product in the positioning fixture at the previous laser station to the positioning fixture at the next laser station, and transfer the shell product in the positioning fixture at the end laser station to the unloading nozzle at the unloading station.

[0012] Preferably, a feeding rotary cylinder is horizontally fixedly connected to the feeding platform, and the feeding tray is fixedly connected to the rotating end of the feeding rotary cylinder. The feeding tray is provided with a feeding chamber that can hold two shell products.

[0013] Preferably, each of the feeding chambers is formed by two opposing transverse baffles and two longitudinal baffles, the transverse baffles and longitudinal baffles being fixedly connected to the feeding tray.

[0014] Preferably, the transplanting frame includes a connecting rod horizontally fixedly connected to the output end of the PPU transplanting robot, and multiple mounting plates fixedly connected to the inner side of the connecting rod. A set of feeding nozzles is fixedly connected to each mounting plate, and the number of mounting plates is one more than the number of positioning fixtures.

[0015] Preferably, each positioning fixture includes a base plate fixedly connected to the upper surface of the laser engraving platform, a transverse limiting plate and a longitudinal limiting plate fixedly connected to the base plate, the transverse limiting plate and the longitudinal limiting plate being perpendicular to each other, a longitudinal positioning cylinder and a transverse positioning cylinder being fixedly connected to the upper surface of the laser engraving platform respectively, and a positioning plate being fixedly connected to the guide rod of the longitudinal positioning cylinder and the transverse positioning cylinder.

[0016] Preferably, a rodless cylinder is fixedly connected to the unloading frame along the conveying direction of the unloading conveying mechanism, and a unloading rotary cylinder is fixedly connected to the moving end of the rodless cylinder.

[0017] Preferably, a grating bracket is provided on the upper surface of the feeding platform between the two feeding chambers, and a grating is fixedly connected to the grating bracket.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention rationally divides the inner cavity of the casing product that requires laser engraving into multiple sections, corresponding to multiple laser engraving stations, allowing multiple laser engraving machines to operate simultaneously. A PPU transfer robot is used, capable of transferring multiple products at once, improving material handling efficiency, making the entire production process more compact, and reducing waiting time. The feeding section uses alternating feeding trays to achieve continuous feeding, avoiding frequent feeding waits in traditional methods, ensuring continuous operation of the production line, and further improving production efficiency. This invention reduces manual operation, minimizes the impact of human factors on production, improves the consistency and quality stability of laser engraving on casing products, and also reduces labor costs.

[0020] This invention can solve the technical problems of low efficiency and inability to achieve automated production in existing laser engraving technology, improve the automation level and production efficiency of the entire laser engraving line, reduce manual intervention, and achieve continuous and efficient internal cavity laser engraving production.

[0021] By dividing the inner cavity laser engraving area into multiple equal parts and matching them with corresponding workstations, multiple workstations can perform laser engraving operations simultaneously. The individual laser engraving time for each part is nearly the same, significantly reducing the overall laser engraving time for a single shell product. Taking a current flat shell product as an example, it is estimated that it takes about 28 seconds to complete the inner cavity laser engraving of a single shell product on a single laser engraving machine. After dividing it into four workstations, four laser engraving machines can produce one shell product in an average of 8 seconds (7 seconds of laser engraving time and 1 second of transfer), greatly improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0023] Figure 2 This is a structural schematic diagram of the feeding station according to an embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of the structure of the feeding tray in an embodiment of the present utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the laser engraving station according to an embodiment of the present utility model.

[0026] Figure 5 This is a top view of the laser engraving station according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the connection structure of the PPU transplanting robot, transplanting frame and feeding nozzle in an embodiment of this utility model.

[0028] Figure 7 This is a schematic diagram of the structure of multiple positioning fixtures according to an embodiment of the present utility model.

[0029] Figure 8 This is a structural schematic diagram of a single positioning fixture according to an embodiment of the present utility model.

[0030] Figure 9 This is a schematic diagram of the connection structure of the feeding conveying mechanism and the feeding flipping mechanism in an embodiment of this utility model.

[0031] Figure 10 This is a schematic diagram of the material feeding and turning mechanism according to an embodiment of the present invention.

[0032] In the diagram: 1. Feeding station; 11. Feeding platform; 12. Feeding tray; 121. Feeding chamber; 122. Horizontal baffle; 123. Vertical baffle; 13. Feeding top plate; 14. Feeding rotary cylinder; 15. Feeding station; 16. Positioning column; 17. Grating bracket; 18. Grating.

[0033] 2. Laser engraving station; 21. Laser engraving platform; 22. Laser engraving ceiling; 23. Front-end laser engraving station; 24. End-end laser engraving station; 25. Middle station 1; 26. Middle station 2.

[0034] 3. Unloading station

[0035] 4. Shell products,

[0036] 5. Laser engraving machine; 51. Laser engraving head.

[0037] 6. Positioning fixture; 61. Base plate; 62. Lateral limiting plate; 63. Longitudinal limiting plate; 64. Longitudinal positioning cylinder; 65. Lateral positioning cylinder; 66. Positioning plate; 67. Clearance groove.

[0038] 7. Transplanting mechanism; 71. PPU transplanting robot; 72. Linkage rod; 73. Mounting plate; 74. Feeding nozzle.

[0039] 8. Material unloading and conveying mechanism; 81. Frame; 82. Conveyor belt assembly; 83. Unloading station.

[0040] 9. Material feeding and turning mechanism; 91. Material feeding frame; 92. Rodless cylinder; 93. Material feeding rotary cylinder; 94. Rotating frame; 95. Material feeding suction nozzle. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0042] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0043] Example

[0044] See appendix Figure 1 As shown, an automatic laser engraving device for the inner cavity of a flat panel shell includes a loading station 1, a laser engraving station 2, and a unloading station 3 arranged sequentially from left to right. The loading station 1 is used to temporarily store the shell product 4; the laser engraving station 2 includes a laser engraving machine 5 for laser engraving the inner cavity of the shell product 4, a positioning fixture 6 for positioning the shell product 4, and a transfer mechanism 7 for transferring the shell product 4; the unloading station 3 is used to convey the laser-engraved shell product 4, and includes an unloading conveying mechanism 8 and an unloading flipping mechanism 9.

[0045] See appendix Figure 2 , 3 As shown, specifically, the loading station 1 includes a loading platform 11 and a loading tray 12 mounted on the loading platform 11. The loading platform 11 is a frame structure, and a loading top plate 13 is horizontally fixedly mounted on the upper end of the frame structure. In this embodiment, to improve loading efficiency, a loading rotary cylinder 14 is horizontally fixedly connected to the upper surface of the loading top plate 13. The loading rotary cylinder 14 can be an existing Airtac HRQ30A rotary cylinder. The loading tray 12 is fixedly connected to the rotating end of the loading rotary cylinder 14 by bolts, that is, the loading rotary cylinder 14 can drive the loading tray 12 to rotate 180°. The loading tray 12 is provided with a loading cavity 121 that can hold two shell products 4. The feeding chamber 121 can be formed by slotting on the upper end face of the feeding tray 12. In this embodiment, each feeding chamber 121 is formed by two oppositely arranged transverse baffles 122 and two oppositely arranged longitudinal baffles 123. The transverse baffles 122 and longitudinal baffles 123 are fixedly connected to the feeding tray 12 by bolts. The shell product 4 can be placed in each feeding chamber 121.

[0046] It should be noted that in this embodiment, "lateral" refers to the conveying direction along the shell product 4, and "longitudinal" refers to the direction perpendicular to the conveying direction of the shell product 4. In the initial state, the two loading chambers 121 are arranged sequentially along the conveying direction of the shell product 4, that is, one loading chamber 121 is close to the laser engraving station 2, and the other loading chamber 121 is far away from the laser engraving station 2. For ease of description, the position of the loading chamber 121 close to the laser engraving station 2 is defined as the loading station 15.

[0047] Furthermore, positioning components can be added to the feeding tray 12 according to the specific structure of the housing product 4. For example, in this embodiment, the housing product 4 is a tablet computer housing with a camera through hole. In order to perform preliminary positioning of the tablet computer housing, a positioning post 16 can be fixedly inserted at the corresponding position on the feeding tray 12. When the tablet computer housing is placed in the feeding cavity 121, the camera through hole of the tablet computer housing can be fitted onto the positioning post 16.

[0048] Furthermore, when placing the shell product 4 into the loading chamber 121, which is far from the laser engraving station 2, using manual or existing mechanical loading devices, operators or mechanical devices may intrude into the space above the loading chamber 121 near the laser engraving station 2, easily interfering with the transfer mechanism 7, thereby causing injury to operators or damage to the equipment. Therefore, in this embodiment, grating supports 17 are provided opposite to each other on the upper surface of the loading top plate 13 between the two loading chambers 121, and a grating 18 is fixedly connected to each grating support 17. The grating 18 can be a safety grating of the existing model SCEA LC20-12NB. Thus, when an operator or mechanical loading device inadvertently intrudes into the space above the loading chamber 121 near the laser engraving station 2 and triggers the grating 18, the existing control device of this equipment can control the equipment, especially the transfer mechanism 7, to stop, thereby improving the safety of this equipment.

[0049] See appendix Figure 4 , 5 As shown, the laser engraving station 2 includes a laser engraving platform 21, which is a frame structure with a laser engraving top plate 22 horizontally fixed on its upper end. Multiple laser engraving machines 5 are arranged sequentially from left to right on the laser engraving top plate 22, each machine being used to perform laser engraving operations on different parts of the inner cavity of the shell product 4. In this embodiment, four laser engraving machines 5 are provided, and existing laser engraving machines can be selected. A positioning fixture 6 is provided below the laser engraving head 51 of each machine 5, used for secondary positioning of the shell product 4 transferred by the transfer mechanism 7. A transfer mechanism 7 is provided on one side of the positioning fixture 6, opposite to the laser engraving machines 5.

[0050] See appendix Figure 6As shown, the transplanting mechanism 7 includes a PPU transplanting robot 71 fixedly connected to the laser-engraved top plate 22. The PPU transplanting robot 71 can be an existing PPU cam robot, which mainly consists of a rotating unit, a U-shaped arm with radius compensation, and a cam mechanism. Driven by a servo or stepper motor, the cam rotates. The cam connects to a slide bar, which, constrained by horizontal and vertical slide rails, drives the U-shaped arm to move along a specific cam trajectory, thereby enabling the object to move along a predetermined trajectory. The specific structure of the PPU transplanting robot 71 can be found in the Chinese Utility Model Patent with authorization announcement number CN219054386U and patent name "A Novel High-Speed ​​Picking and Placing Robot Structure".

[0051] A transplanting frame is provided at the output end of the PPU transplanting robot 71. The transplanting frame includes a connecting rod 72 horizontally fixed to the output end of the PPU transplanting robot 71 by bolts, and multiple mounting plates 73 fixedly connected to the inner side of the connecting rod 72 by bolts. A set of feeding nozzles 74 of existing structure is fixedly connected to each mounting plate 73 by existing mounting structure. In this embodiment, four feeding nozzles 74 are installed on each mounting plate 73. The number of mounting plates 73 is one more than the number of positioning fixtures 6, that is, there are four positioning fixtures 6, five mounting plates 73, and five sets of feeding nozzles 74.

[0052] See appendix Figure 7 , 8 As shown, each positioning fixture 6 includes a base plate 61 horizontally fixed to the upper surface of the laser-engraved top plate 22 by bolts. A transverse limiting plate 62 and a longitudinal limiting plate 63 are fixedly connected to the base plate 61 by bolts. It should be noted that in this embodiment, "transverse" refers to the direction along which the shell product 4 is conveyed, and "longitudinal" refers to the direction perpendicular to the direction of conveying the shell product 4. Therefore, the transverse limiting plate 62 and the longitudinal limiting plate 63 are perpendicular to each other. A longitudinal positioning cylinder 64 and a transverse positioning cylinder 65, perpendicular to the transverse limiting plate 62 and the longitudinal limiting plate 63, are respectively fixedly connected to the upper surface of the laser-engraved top plate 22 by bolts. A positioning plate 66 is fixedly connected to the guide rods of the longitudinal positioning cylinder 64 and the transverse positioning cylinder 65. Both the longitudinal positioning cylinder 64 and the transverse positioning cylinder 65 can be selected from existing Airtac TR6X10S double-rod cylinders.

[0053] After the feeding nozzle 74 transfers the shell product 4 to the bottom plate 61 inside the transverse limiting plate 62 and the longitudinal limiting plate 63, the guide rods of the longitudinal positioning cylinder 64 and the transverse positioning cylinder 65 extend, thereby driving the corresponding positioning plate 66 to abut and push the shell product 4, so that the outer side of the shell product 4 abuts against the positioning plate 66 on the transverse limiting plate 62, the longitudinal limiting plate 63, the longitudinal positioning cylinder 64, and the transverse positioning cylinder 65, thereby completing the positioning of the shell product 4. Afterwards, the laser engraving head 51 above each positioning fixture 6 can perform laser engraving on the inner cavity of the shell product 4.

[0054] It should be noted that the upper surface of the base plate 61 can be designed to mimic the specific structure of the housing product 4. For example, when the housing product 4 is a tablet computer housing, since the edge of the camera through hole of the tablet computer housing is a protruding structure on the outside of the housing, a clearance groove 67 can be opened at the corresponding position on the base plate 61. After the tablet computer housing is positioned, the protruding structure can be embedded in the clearance groove 67.

[0055] See appendix Figure 9 , 10 As shown, the unloading station 3 includes an unloading conveyor mechanism 8, which includes a frame 81 and an existing motor-driven conveyor belt assembly 82 mounted on the frame 81. The unloading conveyor mechanism 8 is an existing belt conveyor device, and the conveyor belt of the unloading conveyor mechanism 8 is conveyed away from the laser engraving station 2, so that the shell product 4 after laser engraving by the laser engraving station 2 is conveyed to the next work station via the unloading conveyor mechanism 8.

[0056] During the process of transferring the housing product 4 from the positioning fixture 6 to the unloading conveyor mechanism 8, the housing product 4 needs to be flipped. Before the unloading conveyor mechanism 8, the housing product 4 is set with its inner cavity facing upward. When the housing product 4 is conveyed on the conveyor belt of the unloading conveyor mechanism 8, the housing product 4 needs to be set with its inner cavity facing downward. Therefore, the housing product 4 needs to be flipped 180°. Thus, in this embodiment, an unloading flipping mechanism 9 is provided on the frame 81.

[0057] Specifically, the feeding and tilting mechanism 9 includes a feeding frame 91 bolted to the frame 81 of the feeding conveying mechanism 8, and a rodless cylinder 92 bolted to the feeding frame 91. The rodless cylinder 92 can be an existing Airtac RMT25X160 magnetic coupler rodless cylinder, and is arranged along the conveying direction of the feeding conveying mechanism 8. A feeding rotary cylinder 93 is bolted to the reciprocating end of the rodless cylinder 8. The feeding rotary cylinder 93 can be an existing Airtac HRQ30A rotary cylinder. A rotating frame 94 is bolted to the rotating end of the feeding rotary cylinder 93, and multiple feeding nozzles 95 are fixedly connected to the rotating frame 94 by an existing fixing structure. In the initial state, the feeding nozzle 95 is positioned upwards to facilitate adsorption of the outer surface of the housing product 4. The rotating end of the feeding rotary cylinder 93 drives the rotating frame 94 to rotate 180°, thereby rotating the housing product 4 adsorbed on the feeding nozzle 95 by 180°, at which point the inner cavity of the housing product 4 faces downwards. By setting up a rodless cylinder 92, after the feeding nozzle 95 adsorbs the housing product 4, the rodless cylinder 92 can move the housing product 4 to a position away from the laser engraving station 2 before rotating it 180°, which can avoid interference between the housing product 4 and the mounting plate 73 of the PPU transfer robot 71 and the feeding nozzle 74 during the rotation.

[0058] It should be noted that, in this embodiment, for ease of description, the position where the feeding nozzle 95 adsorbs the shell product 4 is set as the feeding station 83. Since this embodiment is provided with four positioning fixtures 6, the position of the positioning fixture 6 closest to the feeding station 1 is set as the front laser station 23, the position of the positioning fixture 6 closest to the feeding station 3 is set as the end laser station 24, the position of the positioning fixture 6 closest to the front laser station 23 is set as the middle station 1 25, and the position of the positioning fixture 6 closest to the end laser station 24 is set as the middle station 2 26.

[0059] In each cycle of the PPU transfer robot 71, the shell product 4 can be transferred from the loading tray 12 at the loading station 15 to the positioning fixture 6 at the front laser station 23, the shell product 4 in the positioning fixture 6 at the previous laser station can be transferred to the positioning fixture 6 at the next laser station, and the shell product 4 in the positioning fixture 6 at the end laser station 24 can be transferred to the unloading nozzle 95 at the unloading station 83. The unloading nozzle 95 places the shell product 4 on the unloading transfer mechanism 8 under the drive of the unloading flipping mechanism 9.

[0060] The specific working principle and process of this embodiment are as follows:

[0061] Install each component according to this instruction manual. Figure 1 As shown;

[0062] 1. Feeding process:

[0063] The shell product 4 to be laser-engraved is placed manually or by an existing robot in the loading chamber 121 of the loading tray 12, which is far from the laser engraving station 2 (this can be set as a temporary storage station). Then, the control device controls the rotating end of the loading rotary cylinder 14 to rotate, so that the loading tray 12 rotates 180° and rotates the shell product 4 to be laser-engraved to the loading station 15 to realize the feeding at the loading station 15. Then, the next shell product 4 to be laser-engraved is placed manually or by an existing robot in the loading chamber 121 of the loading tray 12 at the temporary storage station. When the shell product 4 to be laser-engraved at the loading station 15 is taken away by the PPU transfer robot 71 for laser engraving, the loading tray 12 rotates 180° and rotates the shell product 4 placed at the temporary storage station to the loading station 15 for the next PPU transfer robot 71 to pick up. Through the above process, the alternating feeding of the shell product 4 to be laser engraved is realized, continuous feeding is achieved, interruptions in the feeding process are avoided, and feeding efficiency is improved; the shell product 4 can be a laptop shell or a tablet shell product.

[0064] 2. Transshipment process

[0065] The PPU transfer robot 71 is equipped with 5 sets of feeding nozzles 74. In the initial transfer stage of the shell product 4, the leftmost set of feeding nozzles 74 of the PPU transfer robot 71 picks up the shell product 4 at the feeding station 15 and transfers it to the positioning fixture 6 at the front laser station 23. The other sets of feeding nozzles 74 are unloaded. In the next transfer of the shell product 4, the two sets of feeding nozzles 74 on the left side of the PPU transfer robot 71 transfer the shell product 4 at the feeding station 15 to the front laser station 23 and transfer the shell product 4 at the front laser station 23 to the positioning fixture 6 at the middle station 25, respectively. This process continues until all four positioning fixtures 6 contain shell products 4, thus completing the initial transfer stage of the shell product 4.

[0066] Subsequently, the five sets of feeding nozzles 74 of the PPU transfer robot 71 can pick up five shell products 4 at a time. During the transfer process, the PPU transfer robot 71 accurately transfers the shell products 4 from one station to the next according to the set path and positions them in the positioning fixture 4. That is, the shell products 4 are transferred sequentially from the feeding station 15 to the front laser station 23, the middle station 1 25, the middle station 2 26, the end laser station 24, and the unloading station 83.

[0067] When transferring the laser-engraved shell product 4 from the laser engraving station 2 to the material conveying mechanism 8, the new shell product 4 to be laser engraved is simultaneously transferred from the turntable in the loading tray 12 at the loading station 15 to the laser engraving station 2, realizing the simultaneous transfer of materials and improving the transfer efficiency; during the transfer process, the loading nozzle 74 with a vacuum adsorption structure ensures the stable adsorption of the shell product 4, avoiding the shell product 4 from falling or shifting during the transfer process;

[0068] 3. Laser engraving process:

[0069] In this embodiment, the portion of the inner cavity of the shell product 4 requiring laser engraving is divided into four equal parts, corresponding to four laser engraving stations: the front laser station 23, the middle station 1 25, the middle station 2 26, and the end laser station 24. Each laser engraving station's laser engraving machine 5 is responsible for engraving one part of the shell product's inner cavity. After the PPU transfer robot 71 transfers five shell products 4 to the positioning fixtures 4 at each laser engraving station, the guide rods of the longitudinal positioning cylinder 64 and the transverse positioning cylinder 65 extend, causing the inner end faces of the transverse limiting plate 62, the longitudinal limiting plate 63, and the two positioning plates 66 to abut against the four sides of the shell product 4, thereby completing the positioning and fixing of the shell product 4. Then, the four laser engraving machines 5 begin operating simultaneously, engraving their respective assigned parts. Since the individual laser engraving time for each of the four parts is approximately the same, the synchronization and efficiency of the four stations are ensured, shortening the overall laser engraving time for the shell products.

[0070] 4. Flipping and unloading process

[0071] The laser-engraved shell product 4 is transferred to the unloading station 83 by the rightmost set of loading nozzles 74 of the PPU transfer robot 71. The moving end of the rodless cylinder 92 drives the unloading rotary cylinder 93 to move to the end closer to the laser engraving station 2. The unloading rotary cylinder 93 drives the rotating frame 94 to rotate, causing the unloading nozzle 95 to rotate 180° to the unloading station 83 with the unloading nozzle 95 facing upwards. The laser-engraved shell product 4 at the unloading station 83 is picked up by the unloading nozzle 95, and the rodless cylinder 92... The mobile terminal drives the unloading rotary cylinder 93 to move to the end away from the laser engraving station 2. The unloading rotary cylinder 93 drives the rotating frame 94 to rotate 180° so that the inner cavity of the shell product 4 faces downward, so that the shell product 4 is in a state suitable for the assembly line conveying of the unloading conveyor mechanism 8. The shell product 4 is placed on the conveyor belt of the conveyor belt assembly 82. The conveyor belt of the conveyor belt assembly 82 runs at a certain speed, conveying the shell product 4 to the next set other workstation, completing the laser engraving process of the entire inner cavity of the shell product 4.

[0072] Through the coordinated work of the above components, this automatic laser engraving equipment achieves efficient and automated laser engraving production of the internal cavities of metal parts such as laptop and tablet casings, meeting the needs of mass production.

[0073] All technologies not described in this specification are existing technologies. This utility model will use existing control devices, such as PLC controllers. The control devices connect to and control the various components such as the loading station 1, laser engraving station 2, and unloading station 3. Their connection methods and control principles are existing technologies and will not be described in detail here. As long as they can meet the above working process, they are acceptable.

[0074] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic laser engraving device for the inner cavity of a flat panel shell, characterized in that, include: Feeding Station: includes a loading platform and a loading tray installed on the loading platform; Laser engraving station: includes a laser engraving platform, multiple laser engraving machines arranged sequentially on the laser engraving platform, a positioning fixture arranged below each laser engraving machine, a PPU transplanting robot arranged on one side of the positioning fixture, a transplanting frame arranged at the output end of the PPU transplanting robot, and multiple sets of feeding nozzles fixedly connected to the transplanting frame, wherein the number of sets of feeding nozzles is one more than the number of positioning fixtures; Unloading station: includes an unloading conveying mechanism, an unloading frame fixedly connected to the frame of the unloading conveying mechanism, an unloading rotary cylinder fixedly connected to the unloading frame, a rotating frame fixedly connected to the rotating end of the unloading rotary cylinder, and an unloading suction nozzle fixedly connected to the rotating frame; Each cycle of the PPU transfer robot can transfer the shell product from the loading tray at the loading station to the positioning fixture at the front laser station, transfer the shell product in the positioning fixture at the previous laser station to the positioning fixture at the next laser station, and transfer the shell product in the positioning fixture at the end laser station to the unloading nozzle at the unloading station.

2. The automatic laser engraving equipment for the inner cavity of a flat panel shell according to claim 1, characterized in that: A feeding rotary cylinder is horizontally fixedly connected to the feeding platform, and the feeding tray is fixedly connected to the rotating end of the feeding rotary cylinder. The feeding tray is provided with a feeding chamber that can hold two shell products.

3. The automatic laser engraving equipment for the inner cavity of a flat panel shell according to claim 2, characterized in that: Each of the feeding chambers is formed by two opposing transverse baffles and two longitudinal baffles, which are fixedly connected to the feeding tray.

4. The automatic laser engraving equipment for the inner cavity of a flat panel shell according to claim 1, characterized in that: The transplanting frame includes a connecting rod horizontally fixedly connected to the output end of the PPU transplanting robot, and multiple mounting plates fixedly connected to the inner side of the connecting rod. A set of feeding nozzles is fixedly connected to each mounting plate, and the number of mounting plates is one more than the number of positioning fixtures.

5. The automatic laser engraving equipment for the inner cavity of a flat panel shell according to claim 1, characterized in that: Each of the positioning fixtures includes a base plate fixedly connected to the upper surface of the laser engraving platform, a transverse limiting plate and a longitudinal limiting plate fixedly connected to the base plate, the transverse limiting plate and the longitudinal limiting plate being perpendicular to each other, a longitudinal positioning cylinder and a transverse positioning cylinder being fixedly connected to the upper surface of the laser engraving platform respectively, and a positioning plate being fixedly connected to the guide rod of the longitudinal positioning cylinder and the transverse positioning cylinder.

6. The automatic laser engraving equipment for the inner cavity of a flat panel shell according to claim 1, characterized in that: A rodless cylinder is fixedly connected to the unloading rack along the conveying direction of the unloading conveying mechanism, and a unloading rotary cylinder is fixedly connected to the moving end of the rodless cylinder.

7. The automatic laser engraving equipment for the inner cavity of a flat panel shell according to claim 2, characterized in that: A grating bracket is provided on the upper surface of the feeding platform between the two feeding chambers, and a grating is fixedly connected to the grating bracket.

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