A laser cutting device for thin metal sheets and its cutting method

Abstract

The present application relates to the technical field of cutting devices, and provides a laser cutting device for thin metal plates, which includes a laser cutting machine, a raw material storage rack, a workpiece collection box, and a loading and unloading mechanism; the raw material storage rack is used for storing the plates to be processed; the workpiece collection box is used for collecting workpieces, and a material collection port is opened at the top of the workpiece collection box; the loading and unloading mechanism includes a manipulator, and a grasping part for grasping the plates is arranged at the driving end of the manipulator; the manipulator and the grasping part cooperate to grasp the plate to be processed from the raw material storage rack and move it to the working surface of the laser cutting machine, and are also used to grasp the processed plate from the working surface of the laser cutting machine and move it above the material collection port of the workpiece collection box; a separation component for separating the workpiece from the plate is arranged on the grasping part. The present application has the effect of facilitating the loading and unloading of the plates of the laser cutting machine and the separation of the workpieces.

Description

Technical Field

[0001] The present application relates to the field of cutting devices, and in particular to a laser cutting device for thin metal plates and a cutting method thereof. Background Art

[0002] At present, the cutting of workpieces of metal plates is usually completed by a laser cutting machine. Compared with traditional wire cutting equipment, the laser cutting machine has the advantages of non-contact processing and high processing efficiency.

[0003] When cutting a workpiece on a thin metal plate by a laser cutting machine, limited by the thickness condition of the plate, in order to prevent the workpiece from warping or falling during the processing, which affects the rapid movement of the laser cutting head of the laser cutting machine, the laser cutting machine usually adopts a micro-connection process during the cutting process, that is, the workpiece is not completely cut off during the cutting process, so that the workpiece and the plate are kept in point connection to prevent the workpiece from falling or warping. Subsequently, after the workpiece on the plate is cut, the workpiece together with the plate is taken off from the laser cutting machine, and the workpiece is separated and removed from the plate.

[0004] In view of the above related technologies, at present, the handling of the loading and unloading of the laser cutting machine plate and the subsequent separation operation of the workpiece from the plate mostly rely on manual labor. On the one hand, the operation efficiency is low. On the other hand, for some plates with large sizes, manual handling also has certain potential safety hazards. Therefore, there are potential safety hazards. Summary of the Invention

[0005] In order to facilitate the loading and unloading handling of the laser cutting machine plate and the subsequent separation of the workpiece from the plate, the present application provides a laser cutting device for thin metal plates and a cutting method thereof.

[0006] The laser cutting device for thin metal plates and the cutting method provided by the present application adopt the following technical solutions:

[0007] A laser cutting device for thin metal plates includes a laser cutting machine, a raw material storage rack, a workpiece collection box, and a loading and unloading mechanism;

[0008] The raw material storage rack is used for storing and placing the plates to be processed;

[0009] The workpiece collection box is used for collecting workpieces, and a collection port is opened at the top of the workpiece collection box;

[0010] The loading and unloading mechanism includes a manipulator, and a grasping part for grasping the plate is arranged at the driving end of the manipulator; the manipulator and the grasping part cooperate to grasp the plate to be processed from the raw material storage rack and move it to the working table surface of the laser cutting machine, and are also used to grasp the processed plate from the working table surface of the laser cutting machine and move it above the collection port of the workpiece collection box;

[0011] A separating component for separating the workpiece from the plate is provided on the grasping part.

[0012] By adopting the above technical solution, the manipulator cooperates with the grasping part to grasp and move the plate of the raw material storage part onto the laser cutting machine. The laser cutting machine processes the workpiece on the plate. After the workpiece cutting is completed, the manipulator cooperates with the grasping part to transfer the plate from the good working surface of the laser cutting machine to above the material collecting port of the workpiece collecting box and cooperate with the separating component on the grasping part to separate the workpiece micro-connected to the plate from the plate at this time. Compared with the traditional method of manually completing the loading and unloading of the plate and the separation of the workpiece, the automatic loading and unloading of the plate of the laser cutting machine and the separation operation of the workpiece are realized, without manual intervention, which is beneficial to improving the overall processing efficiency of the plate workpiece cutting.

[0013] Preferably, the grasping part includes a grasping bracket, and a plurality of grasping suction cups are installed on both opposite sides of the grasping bracket; the separating component includes a separating bracket and a plurality of lifting driving parts. The separating bracket is located at the bottom of the grasping bracket, and a plurality of separating parts are installed on the separating bracket corresponding to several workpiece cutting stations of the plate; the lifting driving parts are arranged on the grasping bracket, and the lifting driving parts are all drivingly connected to the separating bracket for driving the separating bracket to move up and down.

[0014] By adopting the above technical solution, when the manipulator cooperates with the grasping part to grasp the plate, first, the manipulator moves the grasping bracket to the target plate, and then the manipulator drives the grasping bracket to move down and sucks the target plate through the grasping suction cups on the grasping bracket, and the plate grasping can be completed; when the manipulator cooperates with the grasping part to grasp the processed plate and move it above the workpiece collecting box, the separating bracket is driven to move down by the lifting driving part. During the downward movement of the separating bracket, the workpiece opposite to the separating part at this time is pushed off the plate by the separating part, and the automatic separation of the workpiece and the plate can be completed.

[0015] Preferably, the separating part includes a separating suction cup installed on the separating bracket;

[0016] When the manipulator grasps the plate through the grasping part, the grasping suction cup and the separating suction cup suck the plate together.

[0017] By adopting the above technical solution, through the setting of the separating suction cup, when the manipulator cooperates with the grasping part to grasp the plate, the grasping suction cup and the separating suction cup adsorb the plate together, which is convenient for the grasping part to more firmly grasp and fix the plate; at the same time, when the grasping part grasps the processed plate, the separating suction cup sucks and fixes the corresponding workpiece at this time to temporarily limit the workpiece on the plate, which is beneficial to reducing the situation that the workpiece falls off the plate during the process of the manipulator driving the grasping part and the plate to transfer from the laser cutting machine to the workpiece collecting box.

[0018] Preferably, a collection tray is provided at the bottom of the workpiece collection box, and an insertion opening through which the collection tray passes is further provided on one side of the workpiece collection box. The collection tray slides in the workpiece collection box through the insertion opening.

[0019] By adopting the above technical solution, the workpieces separated from the sheet by the separation component in daily use fall into and accumulate in the collection tray. When cleaning the workpieces collected in the workpiece collection box subsequently, the collection tray can be pulled out from the side of the workpiece collection box, which is convenient for taking out the workpieces in the workpiece collection box.

[0020] Preferably, a sheet conveying component is provided at the top of the workpiece collection box. The sheet conveying component includes a plurality of main supports provided on opposite sides of the aggregate opening. Support rollers are installed on the main supports, and the support rollers all extend above the aggregate opening. A first rotary driving member for driving the support rollers to rotate is provided on the main supports.

[0021] By adopting the above technical solution, when the manipulator cooperates with the grasping part to grasp and move the processed sheet to above the aggregate opening subsequently, the opposite sides of the bottom of the sheet respectively abut against a plurality of support rollers on the opposite sides of the aggregate opening. The plurality of grasping suction cups on both sides of the grasping frame cooperate with the plurality of support rollers on both sides of the aggregate opening to clamp and support the sheet, restricting the situation that the sheet falls into the workpiece collection box due to the force when the workpiece is pushed off the sheet by the separation part moving downward subsequently. After the workpiece is separated from the sheet by the separation component subsequently, the corresponding support rollers can be driven to rotate by the first rotary driving member, and the remaining waste sheets can be conveyed out from one end of the workpiece collection box by the plurality of support rollers, realizing the automatic cleaning of the waste sheets on the workpiece collection box.

[0022] Preferably, a waste material storage rack is further provided at one end of the workpiece collection box. The waste material storage rack is provided near the output end of the sheet conveying component and is used for storing the sheets conveyed out from the output end of the sheet conveying component. A plurality of limiting rods are provided at the end of the waste material storage rack away from the workpiece collection box.

[0023] By adopting the above technical solution, the waste sheets conveyed out by the conveying component above the workpiece collection box can fall onto the waste material storage rack, which is beneficial to realizing the centralized collection of waste sheets. Through the arrangement of the plurality of limiting rods at the end of the waste material storage rack, it is convenient to limit the sheets input to the waste material storage rack by the conveying component, restricting the sheets from sliding out of the waste material storage rack due to inertia.

[0024] Preferably, an auxiliary conveying roller is further supported at the output end of the sheet conveying assembly, and the auxiliary conveying roller is arranged higher than the supporting roller; the workpiece collecting box is further provided with a second rotary driving member for driving the auxiliary conveying roller to rotate, and a conveying gap for clamping and conveying the sheet is formed between the auxiliary conveying roller and the supporting roller.

[0025] By adopting the above technical solution, the auxiliary conveying roller and the supporting roller at the output end of the sheet conveying assembly are used to clamp and convey the sheet, so that the sheet can be conveyed out from one end of the workpiece collecting box in a relatively horizontal state, reducing the situation that the front end of the sheet inclines downward due to its own weight during the subsequent output of the sheet from the workpiece collecting box through the sheet conveying assembly, resulting in the contact between the front end of the sheet and the sheets on the waste material storage rack or the waste workpiece collecting box rack, and causing difficult transmission of the sheet due to large friction.

[0026] A thin metal sheet cutting method, using the above-mentioned thin metal sheet laser cutting device, includes the following steps:

[0027] S1: Sheet in place: The manipulator cooperates with the grasping part to grasp and place the to-be-processed sheet in the raw material storage part on the workbench surface of the laser cutting machine.

[0028] S2: Workpiece cutting and processing: Cut and process the workpiece on the sheet by the laser cutting machine.

[0029] S3: Sheet removal: The manipulator cooperates with the grasping part to grasp and move the processed sheet from the workbench surface of the laser cutting machine to above the material collecting port of the workpiece collecting box.

[0030] S4: Workpiece separation: Separate the workpiece from the sheet through the separation component.

[0031] By adopting the above technical solution, through the cooperation of the manipulator and the grasping part and the separation component on the grasping part, automatic loading and unloading handling of the sheets of the laser cutting machine and automatic separation of the workpieces on the sheets can be realized, and the operation process does not require manual intervention, which is beneficial to improving the overall operation efficiency.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. When the laser cutting machine is running, the manipulator cooperates with the grasping part to grasp and transfer the to-be-cut sheet from the raw material storage part to the workbench of the laser cutting machine to complete automatic loading of the sheet. After the laser cutting machine finishes cutting the workpiece on the sheet, the manipulator cooperates with the grasping part to transfer the sheet from the laser cutting machine to above the workpiece collecting box, and the workpiece slightly connected to the sheet at this time is separated from the sheet through the separation component on the grasping part, completing the transfer of the sheet and the separation of the workpiece, effectively improving the efficiency of the loading and unloading handling of the sheets of the laser cutting machine and the separation operation of the workpieces.

[0034] 2. By setting up the sheet conveying assembly, when separating the workpieces on the sheet through the separating assembly, first abut the relative two sides of the bottom of the sheet against a number of support rods on the relative two sides of the aggregate port respectively, and utilize the cooperation between the support rods on the relative two sides of the aggregate port and the gripping suction cups on the relative two sides of the gripping bracket to assist in clamping and supporting the sheet, which is beneficial to restricting the situation that the sheet is separated from the gripping suction cups due to the force when the workpiece is pushed off the sheet by moving down the separating part. After the workpiece is separated from above the sheet by the separating assembly, the corresponding support roller can be driven to rotate by the first rotary driving part, and then the sheet is conveyed out from one end of the aggregate port of the workpiece collecting box, completing the automatic cleaning of the waste sheet.

[0035] 3. By cooperating the auxiliary conveying roller with the support roller at the output end of the sheet conveying assembly to form a conveying gap for clamping and conveying the sheet, when the sheet is conveyed out by the sheet conveying assembly subsequently, the cooperation between the auxiliary conveying roller and the corresponding support roller can be used to keep the sheet in a relatively horizontal state during the conveying process, effectively restricting the situation that the front end of the sheet moves down due to its own weight, resulting in friction with the existing sheets on the waste workpiece collecting box or the waste storage rack and causing difficult conveying. Description of the Drawings

[0036] Figure 1 is a schematic diagram showing the overall structure of the laser cutting device of the present application.

[0037] Figure 2 is a schematic diagram showing the structure of the loading and unloading mechanism of the present application.

[0038] Figure 3 is a schematic diagram showing the state when the cut sheet is placed on the conveying assembly of the workpiece collecting box of the present application.

[0039] Figure 4 is Figure 3 an enlarged schematic diagram of part A in

[0040] Description of the Reference Numerals:

[0041] 1. Laser cutting machine; 2. Raw material storage rack; 21. Stop bar; 3. Workpiece collecting box; 30. Socket; 31. Collection tray; 311. Holding handle; 32. Sheet conveying assembly; 321. Main support; 322. Support roller; 323. First rotary driving part; 4. Loading and unloading mechanism; 41. Manipulator; 42. Gripping part; 421. Gripping bracket; 422. Gripping suction cup; 423. Separating assembly; 4231. Separating bracket; 4232. Separating suction cup; 4233. First lifting cylinder; 5. Waste storage rack; 51. Limit rod; 6. Auxiliary conveying roller; 61. Sub support; 62. Second rotary driving part; 63. Connecting seat; 64. Second lifting cylinder. Detailed Embodiments

[0042] The following will further elaborate on this application in conjunction with the appended Figures 1-4 drawings.

[0043] The embodiment of this application discloses a laser cutting device for thin metal plates and a cutting method thereof.

[0044] A laser cutting device for thin metal plates, referring to Figure 1 , includes a laser cutting machine 1, a raw material storage rack 2, a workpiece collection box 3, a loading and unloading mechanism 4, and a waste storage rack 5; the raw material storage rack 2 is used for storing the plates to be processed; the workpiece collection box 3 is used for storing workpieces, and a collection port is opened at the top of the workpiece collection box 3; the loading mechanism includes a manipulator 41 and a grasping part 42 arranged at the driving end of the manipulator 41. The manipulator 41 and the grasping part 42 cooperate to transfer the plate to be processed from the raw material storage rack 2 to the workbench of the laser cutting machine 1, and are also used to transfer the processed plate from the workbench of the laser cutting machine 1 to above the workpiece collection box 3; a separation component 423 is also arranged on the grasping part 42, and the separation component 423 is used to separate the workpiece from the plate; the waste storage rack 5 is used for storing the waste plates.

[0045] A number of blocking rods 21 are vertically supported on the periphery of the raw material storage rack 2, which is convenient for the raw material storage rack 2 to better limit the plates to be processed stored on the raw material storage rack 2, so that the plates to be processed are neatly stored on the raw material storage rack 2.

[0046] Referring to Figure 1 and Figure 2 , the grasping part 42 includes a grasping bracket 421; the grasping bracket 421 is spliced by a number of aluminum alloy profiles. A flange part is vertically installed on the grasping part 42, and the flange part is fixedly connected to the driving end of the manipulator 41 through a number of bolts, realizing the stable connection between the grasping bracket 421 and the manipulator 41. A number of grasping suction cups 422 are vertically installed on the opposite sides of the grasping bracket 421. When the grasping part 42 cooperates to grasp the plate, after the manipulator 41 moves the grasping bracket 421 above the target plate, while lowering the grasping bracket 421, the grasping suction cups 422 on the opposite sides of the grasping bracket 421 are used to hold the target plate, and thus the grasping of the plate by the grasping part 42 can be realized.

[0047] The separating component 423 includes a separating bracket 4231 and a plurality of lifting driving members arranged on the grasping bracket 421. The separating bracket 4231 is located at the bottom of the grasping bracket 421. A plurality of separating members are vertically and downwardly installed on the separating bracket 4231 corresponding to the cutting stations of a plurality of workpieces on the plate. Specifically, the separating members are separating suction cups 4232. The lifting driving members include first lifting cylinders 4233 vertically and downwardly installed on the grasping bracket 421. The piston rods of the first lifting cylinders 4233 are all connected to the separating bracket 4231, so that the lifting driving members are drivingly connected to the separating bracket 4231. By driving the piston rods of the first lifting cylinders 4233 to extend and retract, the separating bracket 4231 can be driven to move up and down.

[0048] When the manipulator 41 cooperates with the grasping part 42 to grasp the plate, after the manipulator 41 moves the grasping bracket 421 above the target plate, the plate is adsorbed and fixed by moving the grasping bracket 421 downward and by the grasping suction cups 422 on both opposite sides of the grasping bracket 421 and a plurality of separating suction cups 4232 on the separating bracket 4231 together. Using the grasping suction cups 422 and the separating suction cups 4232 to adsorb and fix the plate together is beneficial for the grasping part 42 to grasp the plate more firmly. Especially when grasping the processed plate, it is beneficial to limit the situation that the workpiece detaches from the plate during the movement of the plate.

[0049] When separating the workpiece from the plate by the separating component 423, the separating bracket 4231 is driven to move downward by the first lifting cylinder 4233, so as to use the downward-moving separating suction cups 4232 to push the workpiece away from the plate downward. After that, the separating suction cups 4232 release the adsorption of the workpiece, and the automatic separation of the workpiece from the plate can be realized.

[0050] Refer to Figure 1 and Figure 3 , a collecting tray 31 is arranged at the bottom of the workpiece collecting box 3. An insertion opening 30 is opened at the outer bottom of the workpiece collecting box 3. The collecting tray 31 is slidably inserted into the workpiece collecting box 3 through the insertion opening 30, so that the collecting tray 31 can be pulled out of the workpiece collecting box 3. When taking out the workpieces collected in the workpiece collecting box 3 later, the collecting tray 31 can be pulled out from the side of the workpiece collecting box 3 to facilitate the taking out of the workpieces. A holding handle 311 is connected to the outside of the collecting tray 31 to facilitate the pulling out of the collecting tray 31.

[0051] Refer to Figure 3 and Figure 4, above the material collecting port of the workpiece collecting box 3, there is also provided a sheet conveying assembly 32 for conveying sheets. The input end and the output end of the sheet conveying assembly 32 extend to both ends of the workpiece collecting box 3 respectively. The sheet conveying assembly 32 includes a plurality of main supports 321 arranged on opposite sides of the material collecting port, and a plurality of main supports 321 on opposite sides of the material collecting port are arranged in one-to-one correspondence. A support roller 322 is horizontally rotatably connected to each main support 321. The axial direction of the support roller 322 is perpendicular to the length direction of the workpiece collecting box 3, and the support rollers 322 all extend above the material collecting port. The main support 321 is also provided with a first rotary driving member 323 for driving the support roller 322 to rotate. Specifically, the first rotary driving member 323 is a reduction motor.

[0052] Referring to Figure 1 and Figure 4 , through the setting of the sheet conveying assembly 32. When the subsequent manipulator 41 cooperates with the grasping part 42 to transfer the processed sheet from the working table of the laser cutting machine 1 to above the material collecting port of the workpiece collecting box 3, the relative two sides of the bottom of the processed sheet are respectively abutted against a plurality of support rollers 322 on the relative two sides of the material collecting port. By using a plurality of support rollers 322 on the relative two sides of the material collecting port to cooperate with a plurality of grasping suction cups 422 on the relative two sides of the grasping bracket 421 to clamp, support and limit the sheet, when the workpiece is later pushed off the sheet by the downward moving separation cylinder, the situation that the sheet is separated from the grasping suction cup 422 due to force is restricted, which is convenient for the separation suction cup 4232 to better push off the workpiece from the sheet when moving downward. At the same time, after the subsequent separation assembly 423 separates the workpiece from the sheet, the corresponding support roller 322 can be driven to rotate by the first rotary driving member 323, and the remaining waste sheet is conveyed out from the top of the workpiece collecting box 3 by the rotating support roller 322, so as to clean the sheet above the material collecting port of the workpiece collecting box 3.

[0053] Referring to Figure 1 and Figure 3 , the waste material storage rack 5 is located at one end of the workpiece collecting box 3 and is arranged close to the output end of the sheet conveying assembly 32. The waste sheets conveyed out by the sheet conveying assembly 32 later can fall onto the waste material storage rack 5, so as to realize the centralized storage of the waste sheets.

[0054] A plurality of limiting rods 51 are vertically and upwardly supported at one end of the waste material storage rack 5 away from the workpiece collecting box 3. Through the setting of the plurality of limiting rods 51, the sheets conveyed out by the sheet conveying assembly 32 can be limited, so as to restrict the sheets from sliding out of the waste material storage rack 5 due to inertia.

[0055] Referring to Figure 3 and Figure 4, an auxiliary conveying roller 6 is also supported at the output end of the sheet conveying assembly 32; the auxiliary conveying roller 6 is located above the two supporting rollers 322 at the output end of the sheet conveying assembly 32, and the axial direction of the auxiliary conveying roller 6 is parallel to the axial direction of the supporting roller 322. Sub - supports 61 are provided corresponding to the auxiliary supporting rollers 322 on the opposite sides of the workpiece collecting box 3. The two ends of the auxiliary conveying roller 6 are respectively rotatably connected to the two sub - supports 61, and a second rotary driving member 62 for driving the auxiliary conveying roller 6 to rotate is further provided on the sub - support 61. Specifically, the second rotary driving member 62 is a reduction motor. The auxiliary conveying roller 6 and the corresponding two supporting rollers 322 form a conveying gap for clamping and conveying the sheet.

[0056] Through the setting of the auxiliary conveying roller 6, the auxiliary conveying roller 6 and the two supporting rollers 322 at the output end of the sheet conveying assembly 32 are used to clamp and convey the sheet, which is convenient for keeping the sheet in a relatively horizontal state during the conveying process, reducing the situation that the front end of the sheet moves downward due to its own weight during the sheet conveying process, causing the front end of the sheet to contact the waste receiving rack 5 or the existing sheets on the waste collecting box, resulting in excessive friction of the sheet and difficult conveying.

[0057] Connecting seats 63 are provided on the opposite sides of the workpiece collecting box 3. The two connecting seats 63 are respectively located below the two sub - supports 61. Second lifting cylinders 64 are vertically upwardly installed on the connecting seats 63, and the piston rods of the second lifting cylinders 64 are connected to the bottoms of the corresponding sub - supports 61. Through the above settings, the height position of the auxiliary conveying roller 6 can be adjusted, which is convenient for adjusting the height of the auxiliary conveying roller 6 according to the thickness of sheets of different specifications, so that the auxiliary conveying roller 6 and the corresponding two supporting rollers 322 can better clamp and convey the sheet.

[0058] A method for cutting thin metal sheets, using the above - mentioned thin metal sheet laser cutting device, referring to Figures 1 to 4 , includes the following steps:

[0059] S1: Sheet in place, the specific steps are as follows:

[0060] S1.1: Sheet grasping: The manipulator 41 drives the grasping bracket 421 to move above the raw material storage rack 2 and jointly holds and fixes the sheet through the grasping suction cup 422 and the separating suction cup 4232;

[0061] S1.2: Sheet in place: The manipulator 41 drives the grasping bracket 421 to move the grasped sheet and place it on the working table of the laser cutting machine 1;

[0062] S1.3: Displacement of the grasping bracket 421: The grasping suction cup 422 and the separating suction cup 4232 release the limitation on the sheet, and the manipulator 41 drives the grasping bracket 421 to move away from the laser cutting machine 1.

[0063] S2: Workpiece cutting and processing: Use a laser cutting machine 1 to cut and process workpieces on a sheet.

[0064] S3: Remove the sheet, and the specific steps are as follows:

[0065] S3.1: Drive the grasping bracket 421 by the manipulator 41 to move above the workbench of the laser cutting machine 1 and use the grasping suction cup 422 and the separating suction cup 4232 to respectively hold and fix the sheet and the workpiece.

[0066] S3.2: Sheet limiting: Drive the grasping bracket 421 by the manipulator 41 to drive the processed sheet to move above the material collecting port of the workpiece collecting box 3, and make the two opposite sides of the bottom of the sheet respectively abut against a number of supporting rollers 322 on the two opposite sides of the material collecting port at the top of the workpiece collecting box 3.

[0067] S4: Workpiece separation, and the specific steps are as follows:

[0068] S4.1: Drive the separating bracket 4231 to move downward by the first lifting cylinder 4233, so as to use the separating suction cups 4232 at various positions of the separating bracket 4231 to push the workpiece slightly connected to the sheet downward away from the sheet.

[0069] S4.2: Displacement of the grasping bracket 421: The grasping suction cup 422 and the separating suction cup 4232 respectively release the adsorption of the sheet and the workpiece, and the manipulator 41 drives the grasping bracket 421 to move away from the workpiece collecting box 3.

[0070] S5: Convey the waste sheet: Drive the supporting rollers 322 and the auxiliary conveying rollers 6 by the first rotary driving member 323 and the second rotary driving member 62 respectively, so as to convey the waste sheet after separating the workpiece into the waste material storage rack 5.

[0071] In this application, the manipulator 41 of the loading and unloading structure cooperates with the grasping part 42 to automatically complete the loading and unloading and handling operations of the sheet of the laser cutting machine 1. At the same time, the workpiece can be automatically separated from the processed sheet through the separating component 423 on the grasping part 42, which is beneficial to improving the overall processing efficiency of the laser cutting machine 1.

[0072] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A laser cutting device for thin metal sheets, characterized in that: It includes a laser cutting machine (1), a raw material storage rack (2), a workpiece collection box (3), and a loading and unloading mechanism (4); The raw material storage rack (2) is used for storing the to-be-processed plates; The workpiece collection box (3) is used for collecting workpieces, and a material collection port is provided at the top of the workpiece collection box (3); The loading and unloading mechanism (4) includes a manipulator (41), and a grasping part (42) for grasping the plates is arranged at the driving end of the manipulator (41); the manipulator (41) and the grasping part (42) cooperate to grasp the to-be-processed plates from the raw material storage rack (2) and move them to the working surface of the laser cutting machine (1), and are also used to grasp the processed plates from the working surface of the laser cutting machine (1) and move them above the material collection port of the workpiece collection box (3); A separation component (423) for separating the workpiece from the plate is arranged on the grasping part (42); The grasping part (42) includes a grasping bracket (421), and a plurality of grasping suction cups (422) are installed on both opposite sides of the grasping bracket (421); the separation component (423) includes a separation bracket (4231) and a plurality of lifting driving parts, the separation bracket (4231) is located at the bottom of the grasping bracket (421), and a plurality of separation parts are installed on the separation bracket (4231) corresponding to several workpiece cutting stations of the plate; the lifting driving parts are arranged on the grasping bracket (421), and the lifting driving parts are all drivingly connected to the separation bracket (4231) for driving the separation bracket (4231) to move up and down; The separation part includes a separation suction cup (4232) installed on the separation bracket (4231); When the manipulator (41) grasps the plate through the grasping part (42), the grasping suction cup (422) and the separation suction cup (4232) hold the plate together; After the manipulator (41) cooperates with the grasping part (42) to grasp and move the processed plate above the workpiece collection box (3), the separation bracket (4231) is driven to move down by the lifting driving part. During the downward movement of the separation bracket (4231), the workpiece opposite to the separation part at this time is pushed off the plate by the separation part; A plate conveying component (32) is arranged at the top of the workpiece collection box (3), and the plate conveying component (32) includes a plurality of main supports (321) supported on both opposite sides of the material collection port. A support roller (322) is installed on each of the main supports (321), and the support rollers (322) all extend above the material collection port. A first rotary driving part (323) for driving the support roller (322) to rotate is arranged on the main support (321); Subsequently, when the manipulator (41) cooperates with the grasping part (42) to grasp and move the processed plate above the material collection port, the two opposite sides of the bottom of the plate are respectively abutted against a plurality of support rollers (322) on both opposite sides of the material collection port; An auxiliary conveying roller (6) is also supported at the output end of the sheet conveying assembly (32). The auxiliary conveying roller (6) is located above two supporting rollers (322) at the output end of the sheet conveying assembly (32); the auxiliary conveying roller (6) is arranged higher than the supporting rollers (322); the workpiece collection box (3) is also provided with a second rotary driving member (62) for driving the auxiliary conveying roller (6) to rotate. A conveying gap for clamping and conveying the sheet is formed between the auxiliary conveying roller (6) and the supporting rollers (322).

2. The laser cutting device for thin metal sheets according to claim 1, characterized in that: A collection tray (31) is arranged at the bottom of the workpiece collection box (3). An insertion opening (30) for the collection tray (31) to pass through is also formed on one side of the workpiece collection box (3). The collection tray (31) slides in the workpiece collection box (3) through the insertion opening (30).

3. The laser cutting device for thin metal plates according to claim 2, characterized in that: A waste storage rack (5) is also arranged at one end of the workpiece collection box (3). The waste storage rack (5) is arranged close to the output end of the sheet conveying assembly (32) and is used for storing the sheets output from the output end of the sheet conveying assembly (32). A plurality of limiting rods (51) are supported at one end of the waste storage rack (5) away from the workpiece collection box (3).

4. A cutting method for a thin metal sheet, which uses the thin metal sheet laser cutting device according to any one of claims 1 to 3, and is characterized in that: Including the following steps: S1: Sheet in place: The manipulator (41) cooperates with the grasping part (42) to grasp the to-be-processed sheet of the raw material storage part and place it on the workbench surface of the laser cutting machine (1). S2: Workpiece cutting and processing: The workpiece is cut and processed on the sheet by the laser cutting machine (1). S3: Sheet removal: The manipulator (41) cooperates with the grasping part (42) to grasp the processed sheet from the workbench surface of the laser cutting machine (1) and move it above the material collection port of the workpiece collection box (3). S4: Workpiece separation: The workpiece is separated from the sheet by the separation assembly (423).

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