A roller conveyor laser cutting system

Abstract

This disclosure provides a roller conveyor laser cutting system, comprising: a workshop manufacturing execution system, a first transmission track, at least one material-carrying worktable, at least one laser cutter, and at least one lifting device corresponding to each laser cutter; the laser cutters are located above the first transmission track, each laser cutter is configured with a corresponding cutting station, and the lifting devices are located below the cutting stations of the corresponding laser cutters; the material-carrying worktable is used to carry the sheet material to be cut and is capable of moving along the first transmission track in response to the control of the workshop manufacturing execution system; the lifting devices are used to perform lifting operations in response to the control of the workshop manufacturing execution system to raise the material-carrying worktable to the cutting station of the corresponding laser cutter or lower it to the first transmission track; the laser cutter is used to perform laser cutting on the sheet material carried by the material-carrying worktable located at the corresponding cutting station.

Description

Technical Field

[0001] This disclosure relates to the field of laser cutting technology, and in particular to a roller conveyor laser cutting system. Background Technology

[0002] Laser cutting is widely used in various manufacturing and processing industries, including machinery, shipbuilding, automotive parts, subway components, kitchenware, metal crafts, and spare engine sets for enterprises and institutions. Laser cutting in these industries typically involves processes such as uncoiling, leveling, stamping, laser cutting, and sorting and palletizing of parts; traditional single-machine cutting methods result in isolated operations and low equipment utilization. Summary of the Invention

[0003] This disclosure aims to address at least one of the technical problems existing in the prior art, and proposes a roller conveyor laser cutting system.

[0004] This disclosure provides a roller conveyor laser cutting system, including: a workshop manufacturing execution system, a first transmission track, at least one material-carrying worktable, at least one laser cutter, and at least one lifting device corresponding to each laser cutter;

[0005] The laser cutter is located above the first transmission track. Each laser cutter is equipped with a corresponding cutting station. The cutting stations of different laser cutters are directly opposite different positions on the first transmission track. The lifting device is located below the cutting station corresponding to the laser cutter.

[0006] The loading worktable is used to carry the sheet metal to be cut and can move along the first transmission track in response to the control of the workshop manufacturing execution system.

[0007] The lifting device is configured to perform an upward operation in response to the control of the workshop manufacturing execution system to raise the material-carrying worktable at the corresponding position on the first transmission track to the cutting station corresponding to the laser cutter, and to perform a downward operation in response to the control of the workshop manufacturing execution system to move the material-carrying worktable located at the cutting station corresponding to the laser cutter down to the first transmission track.

[0008] The laser cutter is used to perform laser cutting on the material supported by the material carrier worktable located at the corresponding cutting station.

[0009] In some embodiments, the material-carrying worktable is equipped with an RFID tag;

[0010] Each of the laser cutters is equipped with a corresponding RFID reader / writer. The RFID reader / writer is used to read the cutting task number in the RFID tag carried by the material loading table located at the cutting station of the corresponding laser cutter, and to feed back the read cutting task number to the corresponding laser cutter.

[0011] The laser cutter includes:

[0012] The program acquisition module is used to acquire the corresponding cutting program based on the received cutting task number;

[0013] The cutting module is used to perform laser cutting on the material carrier table located at the corresponding cutting station according to the cutting program.

[0014] In some embodiments, the program acquisition module includes:

[0015] The cutting task acquisition unit is used to send the cutting task number to the workshop manufacturing execution system and to receive the cutting task information corresponding to the cutting task number fed back by the workshop manufacturing execution system. The cutting task information includes: the board information of each board to be cut in the current task and the cutting program address corresponding to each board.

[0016] The cutting program download unit is used to download the corresponding cutting program from the server according to the cutting program address;

[0017] The workshop manufacturing execution system is equipped with a cutting task management database, which contains different cutting task numbers and their corresponding cutting task information. The workshop manufacturing execution system is also used to retrieve the cutting task information corresponding to the received cutting task number from the cutting task management database after receiving the cutting task number sent by the laser cutter, and to feed back the retrieved cutting task information to the laser cutter.

[0018] In some embodiments, the cutting module includes:

[0019] The first analysis unit is used to analyze the cutting program corresponding to each plate to obtain the nesting cutting drawing of each plate and the relative cutting trajectory of each plate. The relative cutting trajectory records the relative position of each cutting point in the nesting cutting drawing relative to the workpiece origin of the plate.

[0020] The first image processing unit is used to take a picture of the plate and determine the first real origin position of the workpiece origin of the plate and the first overall deflection angle of the plate based on the real picture obtained.

[0021] The true trajectory determination unit is used to determine the true cutting trajectory of the board based on the first true origin position of the board, the first overall deflection angle of the board, and the relative cutting trajectory.

[0022] The cutting unit is used to perform laser cutting on the sheet material according to the actual cutting trajectory.

[0023] In some embodiments, at least two positioning holes are provided on the plate near the workpiece origin of the plate;

[0024] The first image processing unit is specifically used to, when processing the target board material, first move above the target board material and take an overall image of the target board material to obtain an overall image of the target board material. Then, it identifies the workpiece origin and each positioning hole in the overall image of the target board material. Next, for each positioning hole, it first moves directly above the target positioning hole and takes an image to obtain a partial image containing the target positioning hole and the workpiece origin. Then, it determines the center point coordinates of the target positioning hole based on the partial image. Finally, it determines the first true origin position of the workpiece origin of the target board material and the first overall deflection angle of the board material based on the center point coordinates of at least two positioning holes.

[0025] In some embodiments, the first transport track includes: a material conveying starting point and a material conveying ending point;

[0026] The roller conveyor laser cutting system also includes:

[0027] The sorting device is located near the end of the material conveying process and is used to sort the parts in each plate on the target material carrying worktable when the target material carrying worktable, which has completed the laser cutting task, moves to the end of the material conveying process.

[0028] In some embodiments, the sorting device includes:

[0029] The second analysis unit is used to obtain the cutting program corresponding to each plate on the target material loading workbench from the laser cutter that performs laser cutting on the plate on the target material loading workbench, and to analyze the cutting program corresponding to each plate to obtain the nesting cutting drawing of each plate, and to determine the relative center of gravity position of each part relative to the workpiece origin of the plate in the nesting cutting drawing of each plate.

[0030] The second photographic processing unit is used to take a photograph of the sheet metal and determine the second real origin position of the workpiece origin of the sheet metal and the second overall deflection angle of the sheet metal based on the real photograph obtained.

[0031] The true center of gravity determination unit is used to determine the true center of gravity position of each part on the plate according to the second true origin position of the plate, the second overall deflection angle and the relative center of gravity position of each part on the plate.

[0032] The sorting unit is used to sort and stack the parts on the board according to the actual center of gravity position of each part on the board.

[0033] In some embodiments, the system further includes: a second transport track, the second transport track including: an empty workbench transport starting point and an empty workbench transport ending point;

[0034] The sorting device is also used to send sorting completion information back to the workshop manufacturing execution system after sorting each part in each plate on the target loading workbench.

[0035] The workshop manufacturing execution system is also used to send a first track switching command to the target material loading workbench after receiving the sorting completion information, so as to control the target material loading workbench to move from the material conveying end point of the first transmission track to the empty workbench conveying start point of the second transmission track, and then move along the second transmission track to the empty workbench conveying end point.

[0036] In some embodiments, the workshop manufacturing execution system is further configured to, in response to an external operation, write the corresponding cutting task number to the RFID tag of the target material loading workbench after the target material loading workbench completes the loading of the sheet metal at the empty workbench conveying end point, and control the target material loading workbench to move from the empty workbench conveying end point of the second transmission track to the material conveying starting point point of the first transmission track.

[0037] In some embodiments, the second transmission track is located below the first transmission track;

[0038] The starting point of the empty workbench of the second transmission track is located at the ending point of the material transmission of the first transmission track;

[0039] The empty workbench of the second transmission track is located at the material conveying starting point of the first transmission track. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the system structure of a roller conveyor laser cutting system provided in an embodiment of the present disclosure;

[0041] Figure 2 This is a schematic diagram of a laser cutter in one embodiment of the present disclosure;

[0042] Figure 3This is a schematic diagram of the structure of a sorting device in an embodiment of this disclosure;

[0043] Figure 4 This is a top view of a material-carrying worktable that carries a sheet material to be cut, according to an embodiment of this disclosure.

[0044] Figure 5 The figure shows a schematic diagram of a principle for calculating the overall offset angle of the plate using the center point coordinates of two positioning holes in an embodiment of this disclosure;

[0045] Figure 6 This is a schematic diagram of the system structure of another roller conveyor laser cutting system provided in an embodiment of this disclosure. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0048] In the various figures, the same elements are represented by similar reference numerals. For clarity, not all parts in the figures are drawn to scale. Furthermore, some well-known parts may not be shown in the figures.

[0049] Many specific details of this disclosure, such as the structure, materials, dimensions, processing methods, and techniques of the components, are described below to provide a clearer understanding of the disclosure. However, as those skilled in the art will understand, this disclosure may be implemented without following these specific details.

[0050] Figure 1 This is a schematic diagram of the system structure of a roller conveyor laser cutting system provided in an embodiment of this disclosure. Figure 2This is a schematic diagram of a laser cutter according to an embodiment of the present disclosure. Figure 3 This is a schematic diagram of the sorting device in one embodiment of the present disclosure. Figure 4 This is a top view schematic diagram of a material-carrying worktable that holds the material to be cut, according to an embodiment of this disclosure. Figures 1 to 4 As shown, the roller conveyor laser cutting system includes: a workshop manufacturing execution system, a first transmission track, at least one material-carrying worktable, at least one laser cutter, and at least one lifting device corresponding to each laser cutter.

[0051] The laser cutter is located above the first transmission track. Each laser cutter is equipped with a corresponding cutting station. The cutting stations of different laser cutters are directly opposite different positions on the first transmission track. The lifting device is located below the cutting station of the corresponding laser cutter.

[0052] The material-carrying worktable is used to carry the sheet metal to be cut and can move along the first transfer track in response to the control of the workshop manufacturing execution system.

[0053] The lifting device is used to perform an upward operation in response to the control of the workshop manufacturing execution system to raise the material-carrying worktable at the corresponding position on the first transfer track to the cutting station of the corresponding laser cutter, and to perform a downward operation in response to the control of the workshop manufacturing execution system to move the material-carrying worktable located at the cutting station of the corresponding laser cutter down to the first transfer track.

[0054] Laser cutters are used to perform laser cutting on the sheet metal carried by the material carrier table located at the corresponding cutting station.

[0055] In this invention, the roller conveyor laser cutting system described above can realize the automatic conveying and cutting of the material to be cut, which can improve the overall operating efficiency of the laser cutter to a certain extent.

[0056] It should be noted that, in the embodiments of this disclosure, when controlling the material-carrying worktable to move or controlling the lifting device to lift, the safety of the path to be moved by the material-carrying worktable or the path to be lifted by the lifting device is checked in advance (for example, whether there are obstacles on the corresponding path; if there are obstacles, it indicates that the corresponding path is unsafe; if there are no obstacles, it indicates that the corresponding path is safe). If the corresponding path is safe, the material-carrying worktable or the lifting device is controlled to move accordingly. If the corresponding path is unsafe, the safety of the corresponding path is checked again after a period of time until the corresponding path is safe, and then the material-carrying worktable or the lifting device is controlled to move accordingly.

[0057] See also Figure 1 and Figure 2As shown, in some embodiments, the material loading table carries an RFID tag, and each laser cutter is equipped with a corresponding RFID reader / writer. The RFID reader / writer is used to read the cutting task number in the RFID tag carried by the material loading table at the cutting station of the corresponding laser cutter, and to feed back the read cutting task number to the corresponding laser cutter.

[0058] In some embodiments, the RFID reader is fixed on the side of a portion of the first transmission track opposite to the cutting station of the corresponding laser cutter.

[0059] The laser cutter includes a program acquisition module and a cutting module. The program acquisition module is used to obtain the corresponding cutting program based on the received cutting task number; the cutting module is used to perform laser cutting on the material supported by the material carrier table located at the corresponding cutting station according to the cutting program.

[0060] Further optionally, in some embodiments, the program acquisition module includes: a cutting task acquisition unit and a cutting program download unit.

[0061] The cutting task acquisition unit is used to send the cutting task number to the workshop manufacturing execution system and to receive the cutting task information corresponding to the cutting task number from the workshop manufacturing execution system. The cutting task information includes: the board information of each board to be cut in the current task and the cutting program address corresponding to each board.

[0062] The cutting program download unit is used to download the corresponding cutting program from the server according to the cutting program address.

[0063] As an example, the cutting program address is an FTP server address. The laser cutter downloads the corresponding cutting program from the server based on this FTP server address, FTP account, and FTP password. Therefore, in this embodiment, lightweight data (such as sheet material information and cutting program address) is stored in the workshop manufacturing execution system, while larger data volumes (cutting programs) are stored on the server. This design facilitates the deployment of the roller conveyor laser cutting system.

[0064] The workshop manufacturing execution system is equipped with a cutting task management database, which contains different cutting task numbers and their corresponding cutting task information. After receiving the cutting task number sent by the laser cutter, the workshop manufacturing execution system is also used to retrieve the cutting task information corresponding to the received cutting task number from the cutting task management database and feed back the retrieved cutting task information to the laser cutter.

[0065] In this disclosure, considering the limited number of reads and writes supported by the RFID tag, the laser cutter obtains detailed cutting task information from the workshop manufacturing execution system based only on the cutting task number within the RFID tag.

[0066] Further optionally, the cutting module includes: a first parsing unit, a first image processing unit, a real trajectory determination unit, and a cutting unit.

[0067] The first analysis unit is used to analyze the cutting program corresponding to each plate to obtain the nesting cutting drawing of each plate and the relative cutting trajectory of each plate. The relative cutting trajectory records the relative position of each cutting point in the nesting cutting drawing relative to the workpiece origin of the plate.

[0068] The workpiece origin of the sheet metal is generally a corner specified on the sheet metal, such as the upper left corner of the sheet metal.

[0069] The first image processing unit is used to take pictures of the sheet metal and determine the first true origin position of the workpiece origin and the first overall deflection angle of the sheet metal based on the real photos obtained.

[0070] The true trajectory determination unit is used to determine the true cutting trajectory on the board based on the first true origin position of the board, the first overall deflection angle of the board, and the relative cutting trajectory. For example, after determining the first overall deflection angle of the board, the true cutting trajectory on the board can be determined by rotating the relative cutting trajectory by a corresponding angle with the first true origin position as the reference point.

[0071] The cutting unit is used to perform laser cutting on the sheet material according to the actual cutting trajectory.

[0072] See Figure 4 As shown, at least two positioning holes are provided on the plate near the workpiece origin.

[0073] The first image processing unit is specifically used to, when processing the target sheet material, first move above the target sheet material and take an overall image of the target sheet material to obtain an overall image of the target sheet material. Then, it identifies the workpiece origin and each positioning hole in the overall image of the target sheet material. Next, for each positioning hole, it first moves directly above the target positioning hole and takes an image to obtain a partial image containing the target positioning hole and the workpiece origin. Based on the partial image, it determines the center point coordinates of the target positioning hole. Finally, based on the center point coordinates of at least two positioning holes, it determines the first true origin position of the workpiece origin of the target sheet material and the first overall deflection angle of the sheet material.

[0074] In this embodiment of the present disclosure, the first image processing unit first takes an overall image of the target plate to obtain the precise position of the workpiece origin on the target plate (i.e., the first true origin position of the workpiece origin) and the approximate position of the positioning hole (because the positioning hole has a certain size, the shape of the positioning hole will be slightly different when it is photographed from different angles); then, for each target positioning hole, the first image processing unit takes an image of the target positioning hole and the workpiece origin of the plate from directly above the target positioning hole, so as to obtain the precise shape of the target positioning hole and accurately determine the center point coordinates of the target positioning hole (representing the coordinates of the center point of the current target positioning hole relative to the workpiece origin).

[0075] Based on the center point coordinates of at least two positioning holes and the first true origin position of the workpiece origin, the first overall deflection angle of the plate can be obtained.

[0076] Figure 5 The figure illustrates a principle for calculating the overall offset angle of the plate using the center point coordinates of two positioning holes in an embodiment of this disclosure. Figure 5 As shown, if the board material is not offset, the direction vector from the center C1 of the positioning hole to the center C2 of the positioning hole is F1. After actually taking pictures of the two positioning holes using the first image processing unit, the direction vector (the coordinates of C2' minus the coordinates of C1') from the center C1' of the positioning hole to the center C2' of the positioning hole is obtained as F2. By comparing the difference between the directions pointed to by F2 and F1, the overall offset angle of the board material can be obtained. For example, Figure 5 The sheet material shown is offset counterclockwise by θ°.

[0077] In some embodiments, the first transport track includes a material transport starting point and a material transport ending point; the roller conveyor laser cutting system further includes a sorting device located near the material transport ending point, used to sort the parts in each sheet on the target material transport table when the target material transport table, which has completed the laser cutting task, moves to the material transport ending point.

[0078] See Figure 1 and Figure 3 As shown, in some embodiments, the sorting device includes: a second analysis unit, a second image processing unit, a true center of gravity determination unit, and a sorting unit.

[0079] The second analysis unit is used to obtain the cutting program corresponding to each plate on the target loading worktable from the laser cutter that performs laser cutting on the plate on the target loading worktable, and to analyze the cutting program corresponding to each plate to obtain the nesting cutting drawing of each plate, and to determine the relative center of gravity position of each part relative to the workpiece origin of the plate in the nesting cutting drawing of each plate.

[0080] The second photographic processing unit is used to take a photograph of the sheet metal and determine the second true origin position of the workpiece origin and the second overall deflection angle of the sheet metal based on the real photograph obtained.

[0081] The true center of gravity determination unit is used to determine the true center of gravity position of each part on the plate based on the second true origin position of the plate, the second overall deflection angle, and the relative center of gravity position of each part on the plate.

[0082] For example, after determining the second overall deflection angle of the sheet metal, the true center of gravity position of each part can be determined by rotating the relative center of gravity position by the corresponding angle with the second true origin position as the reference point.

[0083] The sorting unit is used to sort and stack the parts on the sheet metal according to their actual center of gravity.

[0084] In some embodiments, the second image processing unit is specifically used to, when it is necessary to process the target plate, first move above the target plate and take a picture of the entire target plate to obtain an overall photo of the target plate, then identify the workpiece origin and each positioning hole in the overall photo of the target plate, then, for each positioning hole, first move directly above the target positioning hole and take a picture to obtain a partial photo containing the target positioning hole and the workpiece origin, and determine the center point coordinates of the target positioning hole based on the partial photo, and finally determine the second true origin position of the workpiece origin of the target plate and the second overall deflection angle of the plate based on the center point coordinates of at least two positioning holes.

[0085] The principle by which the second image processing unit determines the true origin position of the workpiece origin and the overall angle is similar to that of the aforementioned second image processing unit, and will not be repeated here.

[0086] In this embodiment of the disclosure, by first obtaining the relative center of gravity position of each part with respect to the workpiece origin of the plate from the nesting and cutting drawing of the plate (i.e., the center of gravity position of the part when the plate does not deflect), and then obtaining the overall deflection angle of the plate, the true center of gravity position of each part on the plate can be obtained. This facilitates the sorting of parts based on their true center of gravity position, ensuring that the parts remain stable during the sorting process and facilitating safe stacking based on the center of gravity position (stacking is performed by overlapping the center of gravity positions).

[0087] Figure 6 A schematic diagram of the system structure of another roller conveyor laser cutting system provided in this embodiment of the disclosure. Figure 6 As shown, the roller conveyor laser cutting system includes not only the structure described in the previous embodiment, but also a second conveyor track.

[0088] The second transmission track includes an empty workbench conveying start point and an empty workbench conveying end point. The sorting device is also used to send sorting completion information to the workshop manufacturing execution system after sorting each part in each plate on the target material loading workbench. The workshop manufacturing execution system is also used to send a first track switching command to the target material loading workbench after receiving the sorting completion information, so as to control the target material loading workbench to move from the material conveying end point of the first transmission track to the empty workbench conveying start point of the second transmission track, and then move along the second transmission track to the empty workbench conveying end point.

[0089] By setting up a second transmission track, the entire roller conveyor laser cutting system can realize the transportation of sheet metal, the cutting of sheet metal, and the automatic recycling of the empty material workbench, thus forming an automatic cycle.

[0090] In some embodiments, the workshop manufacturing execution system is further configured to, in response to an external operation, write the corresponding cutting task number to the RFID tag of the target material loading workbench after the target material loading workbench has completed loading the sheet at the empty workbench conveying end point, and control the target material loading workbench to move from the empty workbench conveying end point of the second transmission track to the material conveying starting point of the first transmission track.

[0091] In some embodiments, the second conveying track is located below the first conveying track; the starting point of the empty workbench conveying of the second conveying track is located at the ending point of the material conveying of the first conveying track; and the ending point of the empty workbench conveying of the second conveying track is located at the starting point of the material conveying of the first conveying track.

[0092] The working process of at least part of the roller conveyor laser cutting system of this disclosure will now be described in detail with reference to the accompanying drawings. The specific process is as follows:

[0093] S1. The workshop manufacturing execution system sends a start command to the target laser cutter. The start command contains the unique identification code of the target laser cutter (the IP address of the target laser cutter).

[0094] S2. In response to the start command, the target laser cutter performs a start operation and sends feedback information that the laser cutter has completed the start-up to the workshop manufacturing execution system after the start-up is completed;

[0095] S3. After receiving feedback information from the target laser cutter indicating that the start-up has been completed, the workshop manufacturing execution system checks whether it is safe to move from the material conveying start point to the target position located directly below the cutting station of the target laser cutter on the first conveyor roller.

[0096] If safe, proceed to step S4; if unsafe, proceed to step S3 again after a preset interval (e.g., 1 second).

[0097] S4. The workshop manufacturing execution system controls the target material loading table, which is loaded with the target sheet to be cut by the target laser cutter, to move from the material conveying starting point to the target position along the first transmission roller conveyor.

[0098] S5. After the target loading table carrying the target sheet reaches the target position, the workshop manufacturing execution system checks whether it is safe from the target position to the cutting station of the target laser cutter.

[0099] If safe, proceed to step S6; if unsafe, proceed to step S5 again after a preset interval (e.g., 1 second).

[0100] S6. The workshop manufacturing execution system sends a lifting command to the target lifting device located at the target position.

[0101] S7. In response to the lifting command, the target lifting device located at the target position lifts the target material loading table loaded with the target material to the cutting position of the target laser cutter and sends a lifting position signal back to the target laser cutter.

[0102] S8. In response to the lifting position signal, the target laser cutter controls the corresponding RFID reader to read the RFID tag carried by the target material loading table, and receives the target task number read by the RFID reader through the RFID tag, and sends the target task number to the workshop manufacturing execution system.

[0103] S9. The workshop manufacturing execution system retrieves the cutting task information corresponding to the target task number based on the target task number and feeds the cutting task information back to the target laser cutter. The cutting task information includes at least the material information of each target material on the target loading table (material number, thickness, size, material, whether calibration is required) and the cutting program address (e.g., FTP server address).

[0104] S10. The target laser cutter downloads the corresponding cutting program for each target plate to the local machine according to the cutting program address.

[0105] S11. The target laser cutter cuts the corresponding target material according to the cutting program of each target material.

[0106] As an example, in the process of cutting the target sheet, the cutting program of the target sheet is first analyzed to obtain the nesting cutting drawing of the target sheet and the relative cutting trajectory of the target sheet; then, the first true origin position and the first overall deflection angle of the workpiece origin of the target sheet on the target loading worktable are determined; next, the true cutting trajectory is determined based on the first true origin position, the first overall deflection angle and the relative cutting trajectory; finally, the target sheet is laser-cut according to the true cutting trajectory.

[0107] In some embodiments, after the target laser cutter determines the actual cutting trajectory of the target material, the estimated cutting time of the target material can be estimated based on the actual cutting trajectory and the cutting performance of the target laser cutter, and fed back to the workshop manufacturing execution system so that the operators can schedule production tasks based on the estimated cutting time.

[0108] S12. After all the target plates on the target loading worktable have been cut, the target laser cutter sends the task execution result and the second safety check request to the workshop manufacturing execution system, and the target laser cutter switches to standby mode (a non-starting state).

[0109] S13. In response to the second safety inspection request, the workshop manufacturing execution system checks whether it is safe to move from the cutting station of the target laser cutter to the target position on the first transfer roller conveyor.

[0110] If safe, proceed to step S14; if unsafe, proceed to step S13 again after a preset interval (e.g., 1 second).

[0111] S14. The workshop manufacturing execution system sends a descent command to the target lifting device located at the target position.

[0112] S15. In response to the descent command, the target lifting device moves the target loading worktable loaded with the target sheet to the target position on the first transfer roller conveyor, and sends a signal indicating that the descent has been completed and a third safety check request to the workshop manufacturing execution system.

[0113] S16. In response to a third safety check request, the shop floor manufacturing execution system checks whether it is safe from the target location to the end of the material transport route.

[0114] If safe, proceed to step S17; if unsafe, proceed to step S16 again after a preset interval (e.g., 1 second).

[0115] S17. Control the target loading worktable to move along the first conveyor roller to the end of the material conveying process from the target position.

[0116] S18. In response to the target loading workbench reaching the material conveying end point (i.e., reaching the sorting station), the sorting device automatically sorts and stacks each part in each target sheet after cutting.

[0117] As an example, in the process of sorting and stacking target sheet materials, the cutting program of the target sheet material is first analyzed to obtain the nesting cutting drawing of the target sheet material; then, the relative center of gravity position of each part is determined based on the nesting cutting drawing of the target sheet material; next, the second true origin position and the second overall deflection angle of the workpiece origin of the target sheet material on the target loading worktable are determined; then, the true center of gravity position of each part is determined according to the second true origin position, the second overall deflection angle and the relative center of gravity position of each part; finally, the parts are sorted and stacked according to the true center of gravity position of each part.

[0118] S19. After all target plates in the target loading workbench have been sorted, the sorting device sends a sorting completion signal and a fourth safety check request to the workshop manufacturing execution system.

[0119] S20. In response to the fourth safety inspection request, the shop floor manufacturing execution system checks whether it is safe between the end of the material conveying process and the start of the idle workbench conveying process of the second conveyor roller, and between the start of the idle workbench conveying process of the second conveyor roller and the end of the idle workbench conveying process of the second conveyor roller.

[0120] If safe, proceed to step S21; if unsafe, proceed to step S20 again after a preset interval (e.g., 1 second).

[0121] S21. The workshop manufacturing execution system controls the target material-carrying worktable to first move from the end of the material conveying process to the starting point of the empty worktable conveying process of the second conveyor roller (a first auxiliary conveyor roller is set between the end of the material conveying process and the starting point of the empty worktable conveying process), and then move from the starting point of the empty worktable conveying process of the second conveyor roller to the end of the empty worktable conveying process of the second conveyor roller.

[0122] S22. Operators can load plates onto the target loading workbench, which is in an empty state, at the end of the empty workbench delivery line (plate loading station) as needed. Then, the operator writes the corresponding cutting task number to the RFID tag of the target loading workbench through the workshop manufacturing execution system.

[0123] S23. After the workshop manufacturing execution system completes the data writing operation of the RFID tag, the workshop manufacturing execution system controls the target material loading workbench to move from the empty workbench conveying end point of the second transmission track to the material conveying start point of the first transmission track (a second auxiliary transmission roller is set between the empty workbench conveying end point and the material conveying start point).

[0124] After that, step S1 can be performed again.

[0125] As can be seen from the above, the roller conveyor laser cutting system provided in this embodiment can realize roller conveyor transport of material loading workbench, recycling of workbench, implementation of receiving tasks issued by the manufacturing execution system in the workshop, coordination of task scheduling, task reception, deflection recognition of sheet metal, automated cutting, task status feedback, and automatic sorting and palletizing of processed parts, which can effectively improve the overall operating efficiency of laser cutter.

[0126] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A roller conveyor laser cutting system, characterized in that, include: The workshop manufacturing execution system includes a first transfer track, at least one material-carrying worktable, at least one laser cutter, and at least one lifting device corresponding to each laser cutter. The laser cutter is located above the first transmission track. Each laser cutter is equipped with a corresponding cutting station. The cutting stations of different laser cutters are directly opposite different positions on the first transmission track. The lifting device is located below the cutting station corresponding to the laser cutter. The loading worktable is used to carry the sheet metal to be cut and can move along the first transmission track in response to the control of the workshop manufacturing execution system. The lifting device is configured to perform an upward operation in response to the control of the workshop manufacturing execution system to raise the material-carrying worktable at the corresponding position on the first transmission track to the cutting station corresponding to the laser cutter, and to perform a downward operation in response to the control of the workshop manufacturing execution system to move the material-carrying worktable located at the cutting station corresponding to the laser cutter down to the first transmission track. The laser cutter is used to perform laser cutting on the material-carrying worktable located at the corresponding cutting station; The material-carrying workbench is equipped with RFID tags. Each of the laser cutters is equipped with a corresponding RFID reader / writer. The RFID reader / writer is used to read the cutting task number in the RFID tag carried by the material loading table located at the cutting station of the corresponding laser cutter, and to feed back the read cutting task number to the corresponding laser cutter. The laser cutter includes: The program acquisition module is used to acquire the corresponding cutting program based on the received cutting task number; The cutting module is used to perform laser cutting on the material-carrying worktable located at the corresponding cutting station according to the cutting program. The cutting module includes: The first analysis unit is used to analyze the cutting program corresponding to each plate to obtain the nesting cutting drawing of each plate and the relative cutting trajectory of each plate. The relative cutting trajectory records the relative position of each cutting point in the nesting cutting drawing relative to the workpiece origin of the plate. The first image processing unit is used to take a picture of the plate and determine the first real origin position of the workpiece origin of the plate and the first overall deflection angle of the plate based on the real picture obtained. The true trajectory determination unit is used to determine the true cutting trajectory of the board based on the first true origin position of the board, the first overall deflection angle of the board, and the relative cutting trajectory. A cutting unit is used to perform laser cutting on the sheet material according to the actual cutting trajectory; The first transmission track includes: a material conveying starting point and a material conveying ending point; The roller conveyor laser cutting system also includes: The sorting device is located near the end of the material conveying process and is used to sort the parts in each plate on the target material conveying process when the target material carrying worktable that has completed the laser cutting task moves to the end of the material conveying process. The sorting device includes: The second analysis unit is used to obtain the cutting program corresponding to each plate on the target material loading workbench from the laser cutter that performs laser cutting on the plate on the target material loading workbench, and to analyze the cutting program corresponding to each plate to obtain the nesting cutting drawing of each plate, and to determine the relative center of gravity position of each part relative to the workpiece origin of the plate in the nesting cutting drawing of each plate. The second photographic processing unit is used to take a photograph of the sheet metal and determine the second real origin position of the workpiece origin of the sheet metal and the second overall deflection angle of the sheet metal based on the real photograph obtained. The true center of gravity determination unit is used to determine the true center of gravity position of each part on the plate according to the second true origin position of the plate, the second overall deflection angle and the relative center of gravity position of each part on the plate. The sorting unit is used to sort and stack the parts on the board according to the actual center of gravity position of each part on the board.

2. The roller conveyor laser cutting system according to claim 1, characterized in that, The program acquisition module includes: The cutting task acquisition unit is used to send the cutting task number to the workshop manufacturing execution system and to receive the cutting task information corresponding to the cutting task number fed back by the workshop manufacturing execution system. The cutting task information includes: the board information of each board to be cut in the current task and the cutting program address corresponding to each board. The cutting program download unit is used to download the corresponding cutting program from the server according to the cutting program address; The workshop manufacturing execution system is equipped with a cutting task management database, which contains different cutting task numbers and their corresponding cutting task information. The workshop manufacturing execution system is also used to query the cutting task information corresponding to the received cutting task number from the cutting task management database after receiving the cutting task number sent by the laser cutter, and to feed back the queried cutting task information to the laser cutter.

3. The roller conveyor laser cutting system according to claim 1, characterized in that, At least two positioning holes are provided on the plate near the workpiece origin. The first image processing unit is specifically used to, when processing the target board material, first move above the target board material and take an overall image of the target board material to obtain an overall image of the target board material. Then, it identifies the workpiece origin and each positioning hole in the overall image of the target board material. Next, for each positioning hole, it first moves directly above the target positioning hole and takes an image to obtain a partial image containing the target positioning hole and the workpiece origin. Then, it determines the center point coordinates of the target positioning hole based on the partial image. Finally, it determines the first true origin position of the workpiece origin of the target board material and the first overall deflection angle of the board material based on the center point coordinates of at least two positioning holes.

4. The roller conveyor laser cutting system according to claim 1, characterized in that, Also includes: The second transmission track includes: an empty workbench conveying start point and an empty workbench conveying end point; The sorting device is also used to send sorting completion information back to the workshop manufacturing execution system after sorting each part in each plate on the target loading workbench. The workshop manufacturing execution system is also used to send a first track switching command to the target material loading workbench after receiving the sorting completion information, so as to control the target material loading workbench to move from the material conveying end point of the first transmission track to the empty workbench conveying start point of the second transmission track, and then move along the second transmission track to the empty workbench conveying end point.

5. The roller conveyor laser cutting system according to claim 4, characterized in that, The workshop manufacturing execution system is also used to write the corresponding cutting task number to the RFID tag of the target material loading workbench in response to external operation after the target material loading workbench completes the loading of the sheet at the end of the empty workbench conveying, and to control the target material loading workbench to move from the end of the empty workbench conveying of the second transmission track to the starting point of the material conveying of the first transmission track.

6. The roller conveyor laser cutting system according to claim 4, characterized in that, The second transmission track is located below the first transmission track; The starting point of the empty workbench of the second transmission track is located at the ending point of the material transmission of the first transmission track; The empty workbench of the second transmission track is located at the material conveying starting point of the first transmission track.

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