Automatic bending machining equipment and method for metal acoustic board shell

Abstract

The invention relates to automatic bending machining equipment and method for a metal acoustic board shell. The automatic bending machining equipment for the metal acoustic board shell comprises a robot traveling rail, a robot, a feeding platform, a centering platform, a numerical control bending machine, an automatic bending center control system, a bending center turn-over system and a discharging platform, and the robot can move on the robot traveling rail; the gripper suction cups of the robot comprise one set of circular suction cups with the diameter being 40-60 mm, and the other set of circular suction cups are narrow oval suction cups arranged on the periphery of the gripper. The automatic mechanical processing device has the beneficial effects that automatic mechanical processing of automatic grabbing, centering, bending, turning (transposition) and stacking of metal acoustic board shell plates is realized. By achieving automatic bending of metal acoustic board shell machining, the product production quality precision is improved, products are more regular, and the precision consistency is improved. And meanwhile, the labor cost in the production process is effectively reduced, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of production and processing of metal sound-absorbing panels for sound barriers, and in particular to automatic bending processing equipment and a method for a metal sound-absorbing panel shell. Background Art

[0002] Metal sound-absorbing panels are the most ideal sound insulation and noise reduction facilities in the modern urban construction of railway and highway sound barriers, and can be widely used in sound barrier projects such as high-speed railways, intercity railways, urban light rails, and highways. They have the characteristics of large sound insulation, high sound absorption coefficient, high strength, strong weather resistance, beautiful appearance, and easy installation and maintenance.

[0003] At present, the processing scheme of the metal sound-absorbing board shell is that the metal sound-absorbing board panel is pressed into shape by a bending and pressing mold designed and manufactured by a bending machine to press the convex groove on the metal sound-absorbing board panel shell; then it is pressed twice by another bending machine, and the lower side of the metal sound-absorbing board panel is pressed out through two processes; then it is bent and formed by another bending machine on both sides of the metal sound-absorbing board panel, and two processes are operated; in actual processing, the production of the metal sound-absorbing board panel is completed by continuous coordination of three bending machines. The metal sound-absorbing board back plate is pressed into shape by a bending and pressing mold designed and manufactured by two bending machines on the upper and lower convex grooves of the metal sound-absorbing board back plate shell, and two bending machines are used in the pressing process, and two convex groove molds are specially made at the same time; then it is bent and formed by another bending machine on both sides of the metal sound-absorbing board back plate, and two processes are operated; in actual processing, the production of the metal sound-absorbing board back plate is completed by continuous coordination of three bending machines. Six bending machines are used in the production line layout of the overall metal plate panel and back panel, and three sets of bending profiling dies and three sets of bending tools need to be customized.

[0004] The traditional production line for metal sound-absorbing panel shell manufacturing is still a labor-intensive production state, and the production line is composed of multiple bending machines. Because the metal sound-absorbing panel shell has many bending steps, most of the traditional production is completed by mold pressing and bending to adjust the corners. The labor cost is high, and the product accuracy is poorly consistent during the production process. How to solve the problems of automated processing and manufacturing. There are more than a dozen bending processing lines in the bending process of a single component of the metal sound-absorbing panel shell. The difficulty is the high-precision coordination between the robot and the bending machine. By accurately and finely dividing the workpiece beat, the precise coordination between the robot and the bending machine process step is achieved, as well as how to arrange and divide the automated production units. The dense holes on the metal sound-absorbing panel also cause difficulties for the robot gripper to grasp the workpiece. How to solve the problem of the robot gripper grabbing the workpiece, and finally realize the automatic bending of the metal sound-absorbing panel shell.

[0005] In summary, the existing shortcomings of the production of metal sound-absorbing panel shells are that many mold machines are required in the construction of the production line, and the mold machines occupy more space in the workshop. At the same time, the maintenance and repair costs of more mold machines are high; the existing production lines use more manpower in product processing, and the labor cost is high; because the metal sound-absorbing panel shell has more bending steps, most of the traditional production is completed by mold pressing and bending to adjust the corners. Because more molds and manpower are required to complete the collaboration, the product's accuracy is poorly maintained in the production process. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an automatic bending processing device and method for metal sound absorbing board shells that can realize automatic grabbing, centering, bending, turning over (replacing) and stacking of metal sound absorbing board shell materials.

[0007] The present invention provides an automatic bending processing device for a metal sound-absorbing plate shell, and its technical solution is as follows:

[0008] An automatic bending processing device for a metal sound-absorbing plate shell comprises a robot track (08), a robot (09), a loading platform (05), a centering platform (06), a numerical control bending machine (11), an automatic bending center control system (13), a bending center flipping system (14) and a unloading platform (03).

[0009] The robot (09) is capable of moving on the robot track (08), and the gripper suction cups of the robot (09) include a group of circular suction cups with a diameter of 40-60 mm, which are arranged in the middle of the gripper, and the suction cups are controlled by a straight tube type vacuum generator to grasp and release the metal sound absorbing board shell sheet, and another group of narrow elliptical suction cups are arranged around the gripper, and the suction cups are controlled by a straight tube type vacuum generator to grasp the blank position of 30-50 mm at the edge of the metal sound absorbing board panel shell;

[0010] The loading platform (05) is provided with a loading platform positioning device (04), on which a sheet material presence detector and a spreader are installed, and the stacked metal sound-absorbing board shells are separated by giving and releasing the spreader; the unloading platform (03) is provided with a unloading platform positioning device (02), and the unloading platform positioning device (02) enables the unloading platform (03) to return to its position accurately;

[0011] The centering platform (06) is a quadrilateral metal frame, a right-angled edge frame is installed on a right-angled side of the frame, and a ball bearing (07) is installed on the metal frame platform. The entire platform is kept tilted at 30° to 45°. The robot (09) grabs the metal sound-absorbing panel shell from the loading platform (05) to the centering platform (06), places it on the centering platform (06), and allows the ball bearing (07) to slide freely to the right-angled edge frame to perform centering correction on the sheet material;

[0012] The robot (09) grabs the centered metal sound absorbing panel shell to the CNC bending machine (11), and the automatic bending center control system (13) controls the CNC bending machine (11) to bend the metal sound absorbing panel shell sheet;

[0013] The bending center flipping system (14) comprises a movable support frame (15), a support frame grabbing suction cup (16), and a support frame crossbeam (17). A scale ruler is made on the support frame crossbeam (17). The support frame (15) can be slidably fixed on the support frame crossbeam (17) according to the size of the metal sound absorbing board shell. After the metal sound absorbing board shell is bent, when it needs to be flipped, the robot (09) grabs the metal sound absorbing board shell and places it on the support frame (15). Through the induction of the electromagnetic valve, the system controls the vacuum generator suction cup to absorb the fixed metal sound absorbing board shell, and then the robot (09) releases its hand and performs the operation of grabbing the shell with the back hand.

[0014] The vacuum air compression system (18) is used to provide power for the robot (09) and the bending center flipping system (14).

[0015] Furthermore, the processing equipment includes a safety protection system (01) arranged on the periphery of the automatic bending center, the safety protection system (01) includes a fence, a safety light curtain (20), a three-color light, and a sliding door (19), the safety light curtain (20) is arranged on the fence, and the sliding door (19) is arranged for easy entry and exit.

[0016] A method for automatically bending a metal sound-absorbing panel shell, firstly starting a processing button, then the system detects that the sheet has been placed, and then starts full-automatic processing.

[0017] The robot (09) can move on the robot track (08). The gripper suction cup of the robot (09) includes a group of circular suction cups with a diameter of 40-60 mm, which are arranged in the middle of the gripper. The suction cups are controlled by a straight tube vacuum generator to grasp and release the metal sound absorbing board shell sheet. Another group of narrow elliptical suction cups are arranged around the gripper. The suction cups are controlled by a straight tube vacuum generator to grasp the blank position of 30-50 mm at the edge of the metal sound absorbing board panel shell, so that the robot (09) can complete the grasping task and carry out the subsequent bending process.

[0018] The robot (09) grabs the metal sound absorbing board shell from the loading platform (05) to the centering platform (06), and places it on the centering platform (06). The metal frame platform is installed with a ball bearing (07), and the entire platform is kept tilted at 30° to 45°. The ball bearing (07) freely slides to the edge of the right-angle frame to correct the centering of the sheet metal. The robot grabs the sheet metal according to the grabbing coordinate data after centering to perform the next bending operation. A sheet metal presence detector and a spreader are installed on the loading platform positioning device (04). The spreader is used to give and release to separate the stacked metal sound absorbing board shells, so as to prevent the robot from picking up multiple metal sheets during the grabbing process and causing operational errors during processing.

[0019] The robot (09) grabs the centered metal sound-absorbing board shell to the CNC bending machine (11), and the automatic bending center control system (13) controls the CNC bending machine (11) to bend the metal sound-absorbing board shell sheet; after the metal sound-absorbing board shell is bent, when it needs to be turned over, the robot (09) grabs the metal sound-absorbing board shell and places it on the support frame (15), and through the induction of the electromagnetic valve, the system controls the vacuum generator suction cup to absorb and fix the metal sound-absorbing board shell, and then the robot (09) lets go and performs the operation of grabbing the shell with the back hand, completing the back and forth bending operation of different surfaces.

[0020] After the bending is completed, the finished product is grabbed by the robot (09) and placed on the unloading platform (03), and the unloading platform positioning device (02) is used to accurately return the unloading platform (03) to its original position.

[0021] Furthermore, the indicator light alarm detects that the sheet material to be processed is empty, and the sheet material is added. If the stacked products are full, the sheet material is emptied, and then the processing button is repeatedly started to cycle automatic processing.

[0022] The implementation of the present invention includes the following technical effects:

[0023] The automatic bending processing equipment for the metal sound-absorbing panel shell of the present invention is designed through automatic bending step sequence, automatic bending process flow, automatic bending instruction program, and automatic bending unit planning. The robot motion control system organically combines the CNC bending machine and the robot to realize the automatic mechanized processing of automatic grabbing, centering, bending, flipping (transposition), and stacking of the metal sound-absorbing panel shell sheet. By realizing the automatic bending of the metal sound-absorbing panel shell, the production quality accuracy of the product is improved, the product is more regular, and the precision consistency is improved. At the same time, it effectively reduces the labor cost in the production process and significantly improves the production efficiency. Compared with the traditional production line, multiple sets of mechanical equipment and molds are reduced, and the maintenance cost of the mechanical equipment is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1The present invention is a schematic diagram of the process layout of an automatic bending processing equipment for a metal sound absorbing panel shell according to an embodiment of the present invention.

[0025] Figure 2 It is a target flow diagram of an automatic bending processing method for a metal sound absorbing plate shell according to an embodiment of the present invention.

[0026] Figure 3 The present invention is a schematic diagram of a bending workflow of an automatic bending method for a metal sound absorbing panel shell according to an embodiment of the present invention.

[0027] In the figure: 01, safety protection system; 02, unloading platform positioning device; 03, unloading platform; 04, loading platform positioning device; 05, loading platform; 06, centering platform; 07, ball bearing; 08, robot track; 09, robot; 10, robot gripper; 11, CNC bending machine; 12, CNC system; 13, automatic bending center control system; 14, bending center flipping system; 15, movable support frame; 16, support frame grabbing suction cup; 17, support frame crossbeam; 18, vacuum air compressor system; 19, sliding door; 20, safety light curtain. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with embodiments and drawings. It should be pointed out that the described embodiments are only intended to facilitate the understanding of the present invention and do not have any limiting effect on the present invention.

[0029] See also Figure 1As shown, an automatic bending processing equipment for a metal sound-absorbing board shell of this embodiment includes a robot track 08, a robot 09, a loading platform 05, a centering platform 06, a CNC bending machine 11, an automatic bending center control system 13, a bending center flipping system 14, and a unloading platform 03. The robot 09 can move on the robot track 08. The robot 09 body includes a base part, a big arm part, a small arm part, a wrist part, and a robot gripper 10. The robot gripper 10 includes a suction cup, a straight tube vacuum generator, and an empty plate detection device. The gripper suction cup of the robot 09 includes a group of circular suction cups with a diameter of 40-60 mm, which are arranged in the middle of the gripper. The suction cup is controlled by the straight tube vacuum generator to grasp and release the metal sound-absorbing board shell sheet. The suction cup is feasible for grasping the back plate of the metal sound-absorbing board shell, but it is not feasible for the front plate of the metal sound-absorbing board shell. The shell panel of the metal sound-absorbing board is usually composed of dense holes with a diameter of 2.5-6mm. The circular suction cup used by the robot cannot complete the grabbing task. Another type of suction cup is designed for the shell panel of the metal sound-absorbing board. The other group is a narrow elliptical suction cup arranged around the gripper. Under the condition of ensuring high adsorption force, the high precision of the robot is guaranteed by the straight tube vacuum generator to control the suction cup to grab the blank position of 30-50mm on the edge of the shell of the metal sound-absorbing board panel, so that the robot can complete the grabbing task and carry out the subsequent bending process. The loading platform 05 is provided with a loading platform positioning device 04, on which a sheet metal detector and a spreader are installed. The spreader is used to separate the stacked metal sound-absorbing panel shells to prevent the robot from picking up multiple metal plates and making operational errors during processing; the unloading platform 03 is provided with a unloading platform positioning device 02, which allows the unloading platform 03 to return to its original position accurately; the centering platform 06 is a quadrilateral metal frame, and a right-angled edge frame is added to one of the right-angled sides of the frame. Ball bearings 07 are installed on the metal frame platform, and the entire platform is kept tilted at 30° to 45°. The robot 09 places the metal The sound-absorbing panel shell is grabbed from the loading platform 05 to the centering platform 06, placed on the centering platform 06, and freely slides to the right-angle frame edge through the ball 07 to center and correct the sheet material. The robot grabs the sheet material according to the grabbing coordinate data after centering for the next bending operation; the robot 09 grabs the centered metal sound-absorbing panel shell to the CNC bending machine 11, and the automatic bending center control system 13 controls the CNC bending machine 11 to bend the metal sound-absorbing panel shell sheet material. The CNC bending machine 11 includes a machine, a slider, a back gauge system, a hydraulic system, a CNC system 12 and a mold. Grating rulers are installed at both ends of the machine tool to measure the exact distance between the slider and the workbench. The back gauge is made of high-strength aluminum alloy material, which is strong and has small inertia, so it has fast speed, large load capacity and high precision. The back gauge has two standard stop fingers and two adjustable stop fingers, and the back gauge crossbeam has a reinforcement restorer.The bending center flipping system 14 includes a movable support frame 15, a support frame grabbing suction cup 16, and a support frame crossbeam 17. A scale ruler is made on the support frame crossbeam 17. The support frame 15 can be slid and fixed on the support frame crossbeam 17 according to the size of the metal sound absorbing board shell. After the metal sound absorbing board shell is bent, when it needs to be flipped, the robot 09 grabs the metal sound absorbing board shell and places it on the support frame 15. Through the induction of the electromagnetic valve, the system controls the vacuum generator suction cup to absorb the fixed metal sound absorbing board shell, and then the robot 09 lets go and performs the operation of grabbing the shell with the back hand to complete the back and forth bending operation of different surfaces. 18 The vacuum air compressor system is used to provide power for the robot 09 and the bending center flipping system 14.

[0030] Furthermore, the processing equipment includes a safety protection system 01 arranged at the periphery of the automatic bending center, and the safety protection system 01 includes a fence, a safety light curtain 20, a three-color light, and a sliding door 19. The safety light curtain 20 is arranged on the fence, and the sliding door 19 is arranged for easy access and has a safety protection function to prevent the intrusion of people and objects from the outside from being harmed. The safety light curtain 20 can sense the intruder. If there is an intruder, it is immediately transmitted to the control system to suspend the system operation to ensure the safety of people and machinery.

[0031] The automatic bending processing equipment for the metal sound-absorbing panel shell of the present invention is designed through automatic bending step sequence, automatic bending process flow, automatic bending instruction program, and automatic bending unit planning. The robot motion control system organically combines the CNC bending machine and the robot to realize the automatic mechanized processing of automatic grabbing, centering, bending, flipping (transposition), and stacking of the metal sound-absorbing panel shell sheet. By realizing the automatic bending of the metal sound-absorbing panel shell, the production quality accuracy of the product is improved, the product is more regular, and the precision consistency is improved. At the same time, it effectively reduces the labor cost in the production process and significantly improves the production efficiency. Compared with the traditional production line, multiple sets of mechanical equipment and molds are reduced, and the maintenance cost of the mechanical equipment is saved.

[0032] This embodiment also provides a method for automatically bending a metal sound-absorbing plate shell. Figure 2 As shown, first start the processing button, then the system detects that the sheet has been placed, and then starts the fully automatic processing, see Figure 1 and Figure 3 As shown, the robot 09 can move on the robot track 08. The gripper suction cup of the robot 09 includes a group of circular suction cups with a diameter of 40-60 mm, which are arranged in the middle of the gripper. The suction cups are controlled by a straight tube vacuum generator to grasp and release the metal sound-absorbing board shell sheet. Another group is a narrow elliptical suction cup arranged around the gripper. The suction cups are controlled by a straight tube vacuum generator to grasp the blank position of 30-50 mm at the edge of the metal sound-absorbing board panel shell, so that the robot 09 can complete the grasping task and carry out the subsequent bending process.

[0033] The robot 09 grabs the metal sound-absorbing panel shell from the loading platform 05 to the centering platform 06, and places it on the centering platform 06. The metal frame platform is installed with ball bearings 07, and the entire platform is kept tilted at 30° to 45°. The ball bearings 07 slide freely to the right-angle frame edge to center and correct the sheet material. The robot grabs the sheet material according to the grabbing coordinate data after centering to perform the next bending operation. The sheet material presence detector and spreader are installed on the loading platform positioning device 04. The spreader is used to give and release to separate the stacked metal sound-absorbing panel shells to prevent the robot from picking up multiple metal sheets during the grabbing process and making mistakes during processing.

[0034] The robot 09 grabs the centered metal sound absorbing board shell to the CNC bending machine 11, and the automatic bending center control system 13 controls the CNC bending machine 11 to bend the metal sound absorbing board shell sheet; after the metal sound absorbing board shell is bent, when it needs to be turned over, the robot 09 grabs the metal sound absorbing board shell and places it on the support frame 15, and through the induction of the solenoid valve, the system controls the vacuum generator suction cup to adsorb the fixed metal sound absorbing board shell, and then the robot 09 lets go and performs the operation of grabbing the shell with the back hand, completing the back and forth bending operation of different surfaces.

[0035] After the bending is completed, the finished product is grabbed by the robot 09 and placed on the unloading platform 03 , and the unloading platform positioning device 02 is used to accurately return the unloading platform 03 to its original position.

[0036] See also Figure 2 As shown, the indicator light alarm detects that the sheet material to be processed is empty, and the sheet material is added. If the stacked products are full, the sheet material is cleared, and then the processing button is repeatedly started to cycle automatic processing.

[0037] The automatic bending processing method of the metal sound-absorbing plate shell of this embodiment first takes the material and loads it to the loading platform 05. Then, the single piece of sheet material is separated by a magnetic spreader. The robot grabs it to the positioning table and then performs the bending process. The bending operation is completed through the orderly linkage cooperation of the robot, the bending machine and the turning rack. Finally, the material is stacked and then unloaded and stacked on the unloading platform 03 by the flanging rack and the robot.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An automatic bending processing equipment for a metal sound-absorbing panel shell, characterized in that: It includes a robot track (08), a robot (09), a loading platform (05), a centering platform (06), a CNC bending machine (11), an automatic bending center control system (13), a bending center flipping system (14) and a unloading platform (03). The robot (09) is capable of moving on the robot track (08), and the gripper suction cups of the robot (09) include a group of circular suction cups with a diameter of 40-60 mm, which are arranged in the middle of the gripper, and the suction cups are controlled by a straight tube type vacuum generator to grasp and release the metal sound absorbing board shell sheet, and another group of narrow elliptical suction cups are arranged around the gripper, and the suction cups are controlled by a straight tube type vacuum generator to grasp the blank position of 30-50 mm at the edge of the metal sound absorbing board panel shell; The loading platform (05) is provided with a loading platform positioning device (04), on which a sheet material presence detector and a spreader are installed, and the stacked metal sound-absorbing board shells are separated by giving and releasing the spreader; the unloading platform (03) is provided with a unloading platform positioning device (02), and the unloading platform positioning device (02) enables the unloading platform (03) to return to its position accurately; The centering platform (06) is a quadrilateral metal frame, a right-angled edge frame is installed on a right-angled side of the frame, and a ball bearing (07) is installed on the metal frame platform. The entire platform is kept tilted at 30° to 45°. The robot (09) grabs the metal sound-absorbing panel shell from the loading platform (05) to the centering platform (06), places it on the centering platform (06), and allows the ball bearing (07) to slide freely to the right-angled edge frame to perform centering correction on the sheet material; The robot (09) grabs the centered metal sound absorbing panel shell to the CNC bending machine (11), and the automatic bending center control system (13) controls the CNC bending machine (11) to bend the metal sound absorbing panel shell sheet; The bending center flipping system (14) comprises a movable support frame (15), a support frame grabbing suction cup (16), and a support frame crossbeam (17). A scale ruler is made on the support frame crossbeam (17). The support frame (15) can be slidably fixed on the support frame crossbeam (17) according to the size of the metal sound absorbing board shell. After the metal sound absorbing board shell is bent, when it needs to be flipped, the robot (09) grabs the metal sound absorbing board shell and places it on the support frame (15). Through the induction of the electromagnetic valve, the system controls the vacuum generator suction cup to absorb the fixed metal sound absorbing board shell, and then the robot (09) releases its hand and performs the operation of grabbing the shell with the back hand. The vacuum air compression system (18) is used to provide power for the robot (09) and the bending center flipping system (14).

2. The automatic bending processing equipment for metal sound absorbing board shell according to claim 1 is characterized by: The processing equipment comprises a safety protection system (01) arranged at the periphery of an automatic bending center. The safety protection system (01) comprises a fence, a safety light curtain (20), a three-color light, and a sliding door (19). The safety light curtain (20) is arranged on the fence, and the sliding door (19) is arranged for easy entry and exit.

3. A method for automatically bending a metal sound-absorbing panel shell, firstly starting a processing button, then the system detects that the sheet has been placed, and then starts full-automatic processing, characterized in that: The robot (09) can move on the robot track (08). The gripper suction cup of the robot (09) includes a group of circular suction cups with a diameter of 40-60 mm, which are arranged in the middle of the gripper. The suction cups are controlled by a straight tube vacuum generator to grasp and release the metal sound absorbing board shell sheet. Another group of narrow elliptical suction cups are arranged around the gripper. The suction cups are controlled by a straight tube vacuum generator to grasp the blank position of 30-50 mm at the edge of the metal sound absorbing board panel shell, so that the robot (09) can complete the grasping task and carry out the subsequent bending process. The robot (09) grabs the metal sound-absorbing panel shell from the loading platform (05) to the centering platform (06), and places it on the centering platform (06). The metal frame platform is installed with a ball bearing (07), and the entire platform is kept tilted at 30° to 45°. The ball bearing (07) freely slides to the right-angle frame edge to correct the centering of the sheet metal. The robot grabs the sheet metal according to the grabbing coordinate data after centering to perform the next bending operation. A sheet metal presence detector and a magnetic separator are installed on the loading platform positioning device (04). The stacked metal sound-absorbing panel shells are separated by giving and releasing magnetic force, so as to prevent the robot from grabbing multiple metal sheets and causing errors in processing. The robot (09) grabs the centered metal sound-absorbing board shell to the CNC bending machine (11), and the automatic bending center control system (13) controls the CNC bending machine (11) to bend the metal sound-absorbing board shell sheet; after the metal sound-absorbing board shell is bent, when it needs to be turned over, the robot (09) grabs the metal sound-absorbing board shell and places it on the support frame (15), and through the induction of the electromagnetic valve, the system controls the vacuum generator suction cup to absorb and fix the metal sound-absorbing board shell, and then the robot (09) lets go and performs the operation of grabbing the shell with the back hand, completing the back and forth bending operation of different surfaces. After the bending is completed, the finished product is grabbed by the robot (09) and placed on the unloading platform (03), and the unloading platform positioning device (02) is used to accurately return the unloading platform (03) to its original position.

4. The automatic bending method of a metal sound absorbing panel shell according to claim 3, characterized in that: The indicator light alarm detects that the sheet to be processed is empty, and adds sheets. When the stacked products are full, the sheets are cleared, and then the processing button is repeatedly started to cycle automatically.

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