High-pressure gas cylinder inner container closing-up automatic production line and production method

Abstract

The invention discloses a high-pressure gas cylinder liner closing-up automatic production line and a production method, and the production line comprises a roller way conveying line which is in butt joint with a previous procedure and a next procedure to convey gas cylinder liner workpieces; the temporary storage conveying system comprises a material taking temporary storage conveying line and a material feeding temporary storage conveying line which are longitudinally arranged, and is used for carrying out temporary storage and circulation on the gas cylinder liner workpieces; the shifting mechanism is bridged between the roller way conveying line and the cache conveying system; the two necking-in machines and the sawing machine are used for conducting necking-in and sawing on the gas cylinder inner container workpiece; the transfer system comprises an AGV butt joint trolley and an AGV butt joint frame set. And the robot is arranged close to the closing-in machine, the working range of the robot covers the closing-in machine and the sawing machine, and the robot can execute the turning-around operation of the gas cylinder inner container workpiece during closing-in. The automatic production line is compact in layout, small in occupied area, high in automation degree, high in production efficiency and safe, and automatic circulation and efficient closing-in machining production of the gas cylinder inner containers can be achieved through collaborative operation of all equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of gas cylinder production, and in particular to an automated production line and production method for closing the inner liner of a high-pressure gas cylinder. Background Art

[0002] With the booming development of hydrogen-powered vehicles, aerospace, and energy storage systems, the demand for efficient and reliable hydrogen storage methods is becoming increasingly urgent. Aluminum-lined, carbon fiber-wrapped gas cylinders, with their numerous advantages such as light weight, high hydrogen storage density, and long life, have become a mainstream technology, and market demand for them continues to grow rapidly. Against this backdrop, high-pressure gas cylinder manufacturers are seeking effective ways to increase production capacity to meet this growing market demand. Plant expansion and improved automation are becoming the mainstream solutions.

[0003] The aluminum liner spinning process plays a crucial role in the manufacturing of fully wrapped carbon fiber aluminum liner gas cylinders. This is because the quality of the aluminum liner's molding directly affects key performance indicators such as the cylinder's sealing, pressure bearing capacity, and fatigue life. In actual production, the aluminum liner molding process typically utilizes a hot spinning process. Even after the sealing is completed, the surface temperature of the cylinder liner can still reach several hundred degrees Celsius. In such a high-temperature environment, the critical steps in the production process—manual turning and unloading, as well as manual lifting—pose a high risk of high-temperature burns. Furthermore, manual lifting can easily lead to bumps and collisions, which in turn affect the quality of the aluminum liner and ultimately negatively impact the performance and reliability of the high-pressure gas cylinder.

[0004] Given the above circumstances, automated loading and unloading, automatic U-turns, and automated conveying and transfer are undoubtedly extremely important. On the one hand, automated operations can effectively avoid the risk of burns faced by manual workers working in high-temperature environments, providing safety for the production process. On the other hand, automated processes can minimize the impact of manual lifting, thereby improving the quality of aluminum liner products and laying a solid foundation for the production of reliable and high-quality high-pressure gas cylinders, better meeting the urgent demand for high-quality hydrogen storage equipment in fields such as hydrogen energy vehicles, aerospace, and energy storage systems. Summary of the Invention

[0005] To address the aforementioned technical issues, the present invention aims to provide an automated production line and method for the sealing of high-pressure gas cylinder liners. This automated production line features a compact layout, small footprint, high automation, high production efficiency, and safety. Through the coordinated operation of various devices, it enables automated circulation and efficient sealing of gas cylinder liners, resolving issues such as limited workshop space and poor logistics. Furthermore, it reduces the risk of high-temperature operations, improves product quality and production stability, and ultimately enhances the quality of gas cylinder liners.

[0006] To achieve the above technical objectives and reach the above technical effects, the present invention is realized through the following technical solutions:

[0007] On the one hand, the present invention provides an automated production line for necking the inner liner of a high-pressure gas cylinder, including:

[0008] A roller conveyor line, which is docked with the previous process and the next process to convey the inner liner workpiece of the gas cylinder;

[0009] A buffer conveying system, which includes a longitudinal material-taking buffer conveying line and a material-feeding buffer conveying line for buffering and transferring the inner liner workpiece of the gas cylinder;

[0010] A shifting mechanism, which is bridged between the roller conveyor line and the buffer conveying system to achieve the lateral-longitudinal spatial transfer of the inner liner workpiece of the gas cylinder;

[0011] Two necking machines and one sawing machine, which are arranged in a "pin" shape layout for necking and sawing the inner liner workpiece of the gas cylinder;

[0012] A transfer system, including an AGV docking trolley and an AGV docking frame group, for undertaking the交接 and transfer of the inner liner workpiece of the gas cylinder;

[0013] A robot, which is arranged close to the necking machine, whose working range covers the necking machine and the sawing machine, and can perform the operation of turning around the inner liner workpiece of the gas cylinder during necking.

[0014] Further, the roller conveyor line is of a roller conveyor structure, and both the material-taking buffer conveying line and the material-feeding buffer conveying line are of a chain conveyor structure; multiple inner liner workpieces of the gas cylinder are arranged on the material-taking buffer conveying line and the material-feeding buffer conveying line.

[0015] Further, the shifting mechanism includes a support frame, a shifting grasping device and a translation driving mechanism installed on the support frame; the shifting grasping device includes a shifting grasping component and a shifting lifting component; the shifting lifting component is connected with the shifting grasping component; the translation driving mechanism drives the shifting grasping device to move horizontally; the shifting lifting component drives the shifting grasping component to lift and lower, and the shifting grasping component acts to grasp the inner liner workpiece of the gas cylinder.

[0016] Further, the AGV docking frame group includes a transfer docking frame and a loading docking frame; there are three groups of transfer docking frames, which are respectively arranged at the end of the material-taking buffer conveying line, the post-sawing blanking station of the robot and the front end of the material-feeding buffer conveying line, and are respectively used for the transfer of the to-be-processed material-taking of the inner liner workpiece of the gas cylinder, the sawing blanking transfer and the post-processing material-feeding transfer; the loading docking frame is arranged at the pre-necking loading station of the robot for transferring the inner liner workpiece on the AGV docking trolley to the robot.

[0017] Furthermore, the transfer docking frame includes two groups of transfer docking components, each group of transfer docking components includes a fixed bracket, a transfer jacking drive installed on the fixed bracket and a transfer support component, and the transfer jacking drive component can drive the transfer support component to rise and fall to lift and take out items and lower and place items.

[0018] Furthermore, the loading docking frame includes a left docking frame assembly and a right docking frame assembly, wherein the left docking frame assembly includes a left docking bracket, a left docking jacking drive and a liftable left docking support; the right docking frame assembly includes a right docking bracket, a right docking jacking drive and a liftable right docking support; the right docking bracket is provided with a limit block for limiting the right docking frame assembly, and the left docking bracket is provided with a positioning plate; the limit block makes the right docking support higher than the left docking support after it is lowered, and the gas cylinder liner workpiece slides toward the positioning plate due to its own weight; the left docking support and the right docking support both use V-shaped grooves formed by rollers to support the gas cylinder liner workpiece.

[0019] Furthermore, the robot has a loading and unloading grabbing device, which includes a main frame, a loading and unloading drive mechanism installed on the main frame, and a loading and unloading grabber; the loading and unloading drive mechanism drives the loading and unloading grabber to move to grab the gas cylinder liner workpiece for loading and unloading.

[0020] Furthermore, the automated production line also includes a cooling device arranged close to the sawing machine, the cooling device includes a cooling barrel and a water supply barrel connected by a water channel, and an automatic water supply ball valve is installed in the water supply barrel, which automatically supplies water when the water level is lower than a threshold.

[0021] Furthermore, the automated production line also includes a PLC control system for collaboratively controlling the operating sequence of the roller conveyor line, shifting mechanism, transfer system, robot, closing machine and sawing machine.

[0022] Another aspect of the present invention provides a method for producing a high-pressure gas cylinder liner based on the above-mentioned production line, which comprises:

[0023] The gas cylinder liner workpiece output from the previous process is transferred to the material retrieving buffer conveyor line via the roller conveyor line and the shifting mechanism; the transfer system transfers the gas cylinder liner workpiece to the robot; the robot performs the operations of loading the sealing machine, turning the gas cylinder liner workpiece around, and unloading the sealing; the gas cylinder liner workpiece sealed by the sealing machine is transferred to the sawing machine for double-end sawing; the sawed gas cylinder liner workpiece is transferred to the feeding buffer conveyor line via the transfer system, and finally transferred to the roller conveyor line through the shifting mechanism to be sent to the next process.

[0024] The technical effects of the present invention are:

[0025] (1) Automated flow and efficient connection

[0026] The roller conveyor system precisely aligns with the upstream and downstream processes, ensuring efficient transport of cylinder liner workpieces. The retrieving and feeding buffer conveyor lines within the buffer conveyor system buffer and circulate cylinder liner workpieces, effectively balancing the tempo differences between production lines and preventing the entire line from stalling due to temporary failures or blockages in a single process.

[0027] A shift mechanism, connected between the roller conveyor and the buffer conveyor system, enables precise horizontal and vertical transfer of cylinder liner workpieces, improving production efficiency. Two closing machines and a sawing machine are arranged in a "pin" shape, shortening and streamlining the workpiece flow path between closing and sawing, reducing ineffective handling time and improving overall production efficiency.

[0028] (2) Reduce high temperature risks and improve quality

[0029] Since the temperature of the gas cylinder liner is extremely high after hot spinning, the automated production line completely avoids manual turning, unloading and lifting operations in a high-temperature environment, fundamentally eliminating the safety hazard of burns to personnel and improving the production working environment.

[0030] The present invention adopts automatic loading and unloading, automatic U-turn and automatic conveying and transfer methods, which eliminates the possible bumps and collisions that may occur during manual lifting, ensures the integrity of the aluminum liner surface, effectively improves product quality, and guarantees key performance of high-pressure gas cylinders such as sealing, pressure bearing capacity and fatigue life.

[0031] (3) Enhance production stability and consistency

[0032] The automated equipment in this invention operates stably according to pre-set procedures, reducing production fluctuations and interference caused by human factors, making the production process more stable and controllable. The transportation and processing of gas cylinder liner workpieces between each process step maintains high consistency, ensuring that the processing quality of each product meets standard requirements.

[0033] The production line of the present invention can produce according to unified process parameters and operating specifications, avoiding differences and unstable factors that may be caused by manual operation, and improving product quality and performance consistency.

[0034] (4) Improve production efficiency and capacity

[0035] The present invention realizes the continuous and efficient production of gas cylinder liners through the coordinated operation of various equipment in the production line. It can complete key processes such as closing and sawing at a faster speed, reducing the waiting time and transportation time of workpieces in the production process, thereby effectively improving production efficiency and production capacity, and meeting the market's growing demand for high-pressure gas cylinder liners.

[0036] (5) Solve the problems of small workshop space and poor logistics

[0037] This automated production line features a compact layout and small footprint, making efficient use of workshop space. Furthermore, through automated conveying and transfer systems, it optimizes logistics processes, facilitating smoother flow of cylinder liner parts within the workshop. This addresses issues such as limited workshop space and poor logistics, and improves the overall efficiency of the production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural schematic diagram of the automated production line for closing the inner liner of a high-pressure gas cylinder according to the present invention.

[0039] Figure 2 Schematic diagram of the structure of the shifting mechanism in the present invention.

[0040] Figure 3 It is a partial structural diagram of the shifting mechanism in the present invention.

[0041] Figure 4 It is a structural schematic diagram of the transfer docking frame in the present invention.

[0042] Figure 5 It is a structural schematic diagram of the feeding docking frame in the present invention.

[0043] Figure 6 It is a structural schematic diagram of the loading and unloading grabbing device in the present invention.

[0044] In the picture:

[0045] 10: Roller conveyor line; 20: Retrieving and caching conveyor line; 30: Feeding and caching conveyor line; 40: Shifting mechanism, 401: Support frame, 402: Shifting servo motor, 403: Shifting grabbing screw, 404: Shifting gripper, 405: Shifting lifting cylinder, 406: Translation cylinder; 50: Closing machine; 60: Sawing machine; 70: AGV docking trolley; 80: Transfer docking frame, 801: Fixed bracket, 802: Transfer lifting drive component, 803: Transfer support component; 90: Upper Material docking frame, 901: left docking frame, 902: left docking jacking drive component, 903: left docking support component, 904: right docking frame, 905: right docking jacking drive component, 906: right docking support component, 907: limit block, 908: positioning plate; 100: robot, 1001: main frame, 1002: loading and unloading servo motor, 1003: loading and unloading screw rod, 1004: loading and unloading gripper; 110: water supply bucket; 120: cooling bucket; 130: gas cylinder liner workpiece. DETAILED DESCRIPTION

[0046] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the scope of protection of the present invention more clearly defined.

[0047] As Figures 1 to 6 shown in the preferred embodiment of an automated production line for necking the inner liner of a high-pressure gas cylinder, which includes:

[0048] A roller conveyor line 10, which is connected to the previous process and the next process to convey the inner liner workpiece 130 of the gas cylinder.

[0049] A buffer conveying system, which includes a longitudinal feeding buffer conveying line 20 and a feeding buffer conveying line 30, and is used for buffering and transferring the inner liner workpiece 130 of the gas cylinder.

[0050] A shifting mechanism 40, which is bridged between the roller conveyor line 10 and the buffer conveying system to achieve the horizontal-vertical spatial transfer of the inner liner workpiece 130 of the gas cylinder.

[0051] Two necking machines 50 and one sawing machine 60, which are arranged in a "pin" shape layout and are used for necking and sawing the inner liner workpiece 130 of the gas cylinder.

[0052] A transfer system, which includes an AGV docking trolley 70 and an AGV docking frame group, and is used for undertaking the交接 and transfer of the inner liner workpiece 130 of the gas cylinder.

[0053] A robot 100, which is arranged close to the necking machine 50, and its working range covers the necking machine 50 and the sawing machine 60, and is capable of performing the operation of turning the inner liner workpiece 130 of the gas cylinder around during necking.

[0054] The production method based on this automated production line includes:

[0055] The inner liner workpiece 130 output by the previous process is transferred to the feeding buffer conveying line 20 via the roller conveyor line 10 and the shifting mechanism 40;

[0056] The transfer system transfers the inner liner workpiece 130 to the robot 100;

[0057] The robot 100 performs the operations of loading the necking machine 50, turning the inner liner workpiece 130 of the gas cylinder around, and unloading after necking;

[0058] The inner liner workpiece 130 after being necked by the necking machine 50 is transferred to the sawing machine 60 for double-end sawing;

[0059] The inner liner workpiece 130 after sawing is transferred to the feeding buffer conveying line 30 via the transfer system, and finally transferred to the roller conveyor line 10 via the shifting mechanism 40 and sent to the next process.

[0060] Specifically, two roller conveyor lines 10 are provided, arranged transversely at the starting and ending positions of the production line. The roller conveyor line 10 is a roller conveying structure composed of a plurality of rollers arranged in an array. The rollers can be made of materials with a hardness not higher than that of 6061 aluminum alloy, such as nylon, 6061 aluminum alloy, or brass. Alternatively, the main body can be made of a steel structure, and the supporting parts can be made of materials such as nylon and rubber to effectively prevent scratches on the workpiece surface. The roller conveyor line 10 is equipped with a workpiece identification sensor, which can achieve precise positioning of the gas cylinder liner workpiece 130. The position of the workpiece identification sensor can also be adjusted to accommodate workpieces of different lengths.

[0061] The retrieving and feeding buffer conveyor lines 20 and 30 are arranged longitudinally, corresponding to the roller conveyor lines 10 at the start and end of the production line, respectively. Both are chain conveyor structures driven by servo motors. During production, the retrieving and feeding buffer conveyor lines 20 and 30 can be arranged to buffer multiple gas cylinder liner workpieces 130.

[0062] The workpiece transfer between the roller conveyor line 10 and the buffer conveying system is achieved through the shifting mechanism 40. The shifting mechanism 40 includes a support frame 401 and a shifting grasping device and a translation driving mechanism installed on the support frame 401. The shifting grasping device includes a shifting grasping assembly and a shifting lifting assembly. In the preferred embodiment, the shifting grasping assembly includes a shifting servo motor 402, a shifting grasping screw rod 403 driven by the shifting servo motor 402, and a shifting gripper 404. The shifting gripper 404 is slidably installed on the shifting grasping screw rod 403, and includes two shifting sub-grippers; the shifting lifting assembly includes a shifting lifting cylinder 405 and a slide rail slider structure, and the shifting lifting cylinder 405 is connected to the shifting grasping assembly. The translation drive mechanism includes a translation cylinder 406 and a slide block structure. The translation cylinder 406 drives the shift grabbing device to move laterally in cooperation with the slide block structure. The shift lifting cylinder 405 drives the shift grabbing assembly to rise and fall in cooperation with the slide block structure. The shift servo motor 402 is decelerated by a reducer and transmits torque to the shift grabbing screw 403 through a universal coupling. The shift grabbing screw 403 drives the two shift sub-grippers to approach each other to achieve the grasping and shifting of the gas cylinder liner workpiece 130. The shift gripper 404 of the shift mechanism 40 is also equipped with a workpiece identification sensor, which can effectively identify the gas cylinder liner workpiece 130, achieve accurate and stable grasping, and effectively avoid workpiece collision caused by human error.

[0063] In other embodiments, the shift gripper 404 can be opened and clamped using pneumatic or hydraulic actuation. In this embodiment, servo motor control is used to control the clamping force, preventing excessive clamping force and workpiece deformation. The shift gripper's lifting and translational motions can also be driven by hydraulics or motors.

[0064] The gas cylinder liner workpiece 130 to be closed output from the previous process is placed on the roller conveyor line 10. After the workpiece identification sensor detects the gas cylinder liner workpiece 130, the roller conveyor line 10 automatically runs and conveys the workpiece to the bottom of the shift mechanism 40. After the workpiece identification sensor under the shift mechanism 40 detects that the gas cylinder liner workpiece 130 is in place, the track conveyor line stops running and waits for the shift mechanism 40 to transfer the gas cylinder liner workpiece 130.

[0065] The shift mechanism 40 uses a shifting and grabbing device to grab and lift the cylinder liner workpiece 130 from the horizontal roller conveyor line 10. The shifting and grabbing device, along with the cylinder liner workpiece 130, is then translated by a translation cylinder 406 via a slide rail and slider structure to the longitudinal material retrieving and buffering conveyor line 20. The shifting and grabbing device then drops the cylinder liner workpiece 130 onto the longitudinal material retrieving and buffering conveyor line 20. (The same process applies to the transfer of the cylinder liner workpiece 130 from the longitudinal material feeding and buffering conveyor line 30 to the transverse roller conveyor line 10.)

[0066] The AGV docking frame group includes a transfer docking frame 80 and a loading docking frame 90; there are three groups of transfer docking frames 80, which are respectively arranged at the end of the material retrieval buffer conveyor line 20, the post-sawing unloading station of the robot 100 and the front end of the feeding buffer conveyor line 30, and are respectively used for the material retrieval and transfer for processing, sawing and unloading transfer and post-processing feeding transfer of the gas cylinder liner workpiece 130; the loading docking frame 90 is arranged at the loading station before closing of the robot 100, and is used to hand over the gas cylinder liner workpiece 130 on the AGV docking cart 70 to the robot 100.

[0067] Specifically, the transfer docking frame 80 includes two sets of transfer docking assemblies. Each set of transfer docking assemblies includes a fixed bracket 801, a transfer lifting driver 802 mounted on the fixed bracket 801, and a transfer support 803. The transfer lifting driver 802 can drive the transfer support 803 to rise and fall with the cooperation of the guide structure to lift and remove components and lower and place components. The two sets of transfer docking frames 80 cooperate with the left and right parts of the gas cylinder liner workpiece 130. The transfer support 803 is a V-shaped structure formed by two supporting blocks.

[0068] The loading docking frame 90 includes a left docking frame assembly and a right docking frame assembly, wherein the left docking frame assembly includes a left docking bracket 901, a left docking jacking drive 902 and a liftable left docking support 903; the right docking frame assembly includes a right docking bracket 904, a right docking jacking drive 905 and a liftable right docking support 906; the right docking bracket 904 is provided with a limit block 907 for limiting the right docking frame assembly, and the left docking bracket 901 is provided with a positioning plate 908; the limit block 907 makes the right docking support 906 higher than the left docking support 903 after it is lowered, and the gas cylinder liner workpiece 130 slides toward the positioning plate 908 due to its own weight; the left docking support 903 and the right docking support 906 both use V-shaped grooves formed by rollers to support the gas cylinder liner workpiece 130. The outer surface of the roller can be made of nylon, 6061 aluminum alloy, brass or other materials with a hardness not higher than that of 6061 aluminum alloy, or the main body can be made of steel structure and the supporting parts can be made of nylon, rubber or other materials to effectively prevent the surface of the workpiece from being scratched (the roller surface in this embodiment is made of 6061 aluminum plate)

[0069] The loading docking frame 90 utilizes the positioning plate 908 on the left bracket to achieve precise positioning of the workpiece, ensuring that the robot 100 accurately grasps and loads the workpiece and that the product quality is consistent.

[0070] In this embodiment, the left docking jacking drive member 902 and the right docking jacking drive member 905 are cylinders. In other embodiments, other drive forms can also be used.

[0071] The AGV docking frame is equipped with a workpiece recognition sensor, which can effectively identify the workpiece.

[0072] The AGV docking trolley 70 has a bracket that can lift the gas cylinder liner workpiece 130. The AGV docking trolley can walk along the designed route and cooperate with the AGV docking frame group to realize the pickup and transfer.

[0073] The transfer docking frame 80 at the end of the material fetching and buffering conveyor line 20 identifies the gas cylinder liner workpiece 130 through the workpiece identification sensor. The transfer jacking drive 802 uses the transfer support 803 to lift the gas cylinder liner workpiece 130 and sends a "can pick up signal" to the AGV docking trolley 70. When the AGV docking trolley 70 is idle, it performs the picking operation. First, the AGV docking trolley 70 walks between the two sets of transfer docking components. The transfer jacking drive 802 falls, and the gas cylinder liner workpiece 130 falls onto the bracket of the AGV docking trolley 70. The AGV docking trolley 70 walks to the loading docking frame 90 at the pre-closing loading station and hands over the gas cylinder liner workpiece 130 to the robot 100 through the loading docking frame 90. Specifically, the loading docking frame 90 identifies the cylinder liner workpiece 130 through the workpiece recognition sensor. The left docking lifting drive 902 and the right docking lifting drive 905 utilize the left docking support 903 and the right docking support 906 to lift the cylinder liner workpiece 130 and remove it. During the drop, the limit block 907 ensures that the right docking support 906 is lowered higher than the lowered left docking support 903. The cylinder liner workpiece 130 slides towards the positioning plate 908 due to its own weight. At this point, the robot 100 can accurately grasp the cylinder liner workpiece 130.

[0074] The robot 100 has a loading and unloading grasping device, which includes a main frame, a loading and unloading drive mechanism installed on the main frame, and a loading and unloading gripper. In this embodiment, the loading and unloading drive mechanism includes a loading and unloading servo motor and a loading and unloading screw. The loading and unloading gripper includes two loading and unloading sub-grippers. The loading and unloading servo motor is reduced in speed by a reducer and transmits torque to the loading and unloading screw through a universal coupling, driving the loading and unloading gripper to move in cooperation with the slide rail slider structure. The two loading and unloading sub-grippers approach to grasp the gas cylinder liner workpiece 130 for loading and unloading. The loading and unloading device also uses two right-angle reducers. On the one hand, it achieves a higher reduction ratio to improve the stability and reliability of the robot 100 in grasping the workpiece. On the other hand, it enables the loading and unloading servo motor to be arranged above the main frame, which is more conducive to the flexible position change of the robot 100 and avoids the interference between the loading and unloading servo motor and the robot 100 pipeline package when the robot 100 grasps the workpiece for loading.

[0075] The robot 100 cooperates with the AGV docking frame assembly to realize the loading of the closing machine 50. Specifically, the cooperation process between the closing machine 50 and the robot 100 is as follows:

[0076] First end loading: the chuck of the closing machine 50 opens and sends a "loading signal" to the robot 100. After receiving the loading signal, the robot 100 takes the material from the loading docking frame 90 and sends one end of the cylinder liner workpiece 130 into the chuck of the closing machine 50; the robot 100 sends a "chuck closing request signal" to the closing machine 50, the closing machine 50 closes the chuck and sends a "chuck closed signal" to the robot 100, the robot's loading and unloading gripper opens, the robot 100 runs to the end of the cylinder liner workpiece 130 and clamps the cylinder liner workpiece 130 for the second time, and the machine Person 100 sends a "chuck opening request signal" to the closing machine 50, the closing machine 50 opens the chuck and sends a "chuck opened signal" to the robot 100, the robot 100 again feeds the cylinder liner workpiece 130 into the chuck, and after it is delivered to the designated position, the robot 100 again sends a "chuck secondary closing request signal" to the closing machine 50, the closing machine 50 closes the chuck and sends a "chuck secondary closed signal" to the robot 100, the robot's loading and unloading grippers open, the robot 100 runs to a safe position and sends a "loading completion signal" to the closing machine 50.

[0077] First end closing: the closing machine 50 automatically executes the closing procedure (when the first closing machine 50 is closing, the robot 100 feeds the second closing machine 50).

[0078] U-turn: After the closing program at one end is completed, the closing machine 50 sends a "closing completion signal" to the robot 100, and the robot 100 runs to the end of the cylinder liner workpiece 130 and clamps the cylinder liner workpiece 130. The robot 100 sends a "chuck opening request signal" to the closing machine 50, and the closing machine 50 chuck opens and sends a "chuck opened signal" to the robot 100. The robot 100 takes a section of the cylinder liner workpiece 130 out of the chuck and sends a "chuck opening request signal" to the closing machine 50. The chuck of the closing machine 50 is closed and sends a “chuck closed signal” to the robot 100. The robot 100 runs to the chuck and clamps the gas cylinder liner workpiece 130 again. The robot 100 sends a “request chuck secondary opening signal” to the closing machine 50. The chuck of the closing machine 50 is opened and sends a “chuck secondary opened signal” to the robot 100. The robot 100 takes the gas cylinder liner workpiece 130 out of the chuck and rotates the gas cylinder liner workpiece 130 180 degrees to turn around.

[0079] Second end loading: (The basic logic action is the same as the first end loading, but there is no need to pick up the material) After completing the U-turn, the robot 100 puts the cylinder liner workpiece 130 into the chuck of the closing machine 50 and sends a "chuck closing request signal" to the closing machine 50. The closing machine 50 closes the chuck and sends a "chuck closed signal" to the robot 100. The loading and unloading grippers of the robot are opened, and the robot 100 runs to the end of the cylinder liner workpiece 130 and clamps the cylinder liner workpiece 130 for the second time. The robot 100 sends a "chuck closed signal" to the closing machine 50. The closing machine 50 opens the chuck and sends a "chuck opened signal" to the robot 100. The robot 100 feeds the cylinder liner workpiece 130 into the chuck again. After it reaches the specified position, the robot 100 again sends a "chuck secondary closing signal" to the closing machine 50. The closing machine 50 closes the chuck and sends a "chuck secondary closing signal" to the robot 100. The loading and unloading grippers of the robot are opened, and the robot 100 runs to a safe position and sends a "loading completion signal" to the closing machine 50.

[0080] Second end closing: the closing machine 50 automatically executes the closing procedure again (when the first closing machine 50 is performing the second end closing operation, the robot 100 turns the workpiece on the second closing machine 50).

[0081] Unloading: (The logic is the same as that of turning around, but there is no turning around at the end) After the second end closing program is completed, the closing machine 50 sends a "closing completion signal" to the robot 100, and the robot 100 runs to the end of the gas cylinder liner workpiece 130 and clamps the gas cylinder liner workpiece 130. The robot 100 sends a "chuck opening request signal" to the closing machine 50, the closing machine 50 chuck opens and sends a "chuck opened signal" to the robot 100, and the robot 100 takes a section of the gas cylinder liner workpiece 130 out of the chuck and unloads it to the closing machine 50. The “chuck closing request signal” is sent, the chuck of the closing machine 50 is closed and the “chuck closed signal” is sent to the robot 100, the robot 100 runs to the chuck and clamps the gas cylinder liner workpiece 130 again, the robot 100 sends the “chuck secondary opening request signal” to the closing machine 50, the chuck of the closing machine 50 is opened and the “chuck secondary opened signal” is sent to the robot 100, the robot 100 takes the gas cylinder liner workpiece 130 out of the chuck, completes the closing and unloading, and sends the “unloading completion signal” to the closing machine 50.

[0082] A sawing machine 60 is arranged at the rear of the two closing machines 50, which is used to saw the bottle mouth of the gas cylinder liner workpiece 130 after closing, to ensure that the bottle mouth end is flat and the length of the workpiece is consistent. The sawing machine 60 can be a sawing device in the form of a circular saw machine, a band saw machine, etc. (this embodiment uses a circular saw machine with a saw blade diameter of 300mm). At the same time, a cooling device is arranged on the right side of the robot 100, which is used to cool the workpiece before sawing the bottle mouth, to prevent the high-temperature state of the workpiece from adhering to the surface of the saw blade and thus affecting the sawing quality and the life of the saw blade. The cooling device is provided with a cooling barrel 120 and a water replenishing barrel 110. The water replenishing barrel 110 is provided with an automatic water replenishing ball valve, and the cooling barrel 120 and the bottom of the water replenishing barrel 110 are connected by a water channel. When the workpiece is cooled, the evaporation of water in the cooling barrel 120 is reduced, and the water level in the water replenishing barrel 110 is reduced synchronously. When the water level is lower than the set value, the water replenishing barrel 110 automatically replenishes water to ensure continuous production operations.

[0083] After the bottle mouths at both ends of the gas cylinder liner workpiece 130 are sawed, the robot 100 places the gas cylinder liner workpiece 130 on the V-shaped support block of the transfer docking frame 80 on the robot's post-sawing unloading station. After the workpiece identification sensor detects the workpiece, the lifting cylinder lifts the workpiece and sends a "can pick up signal" to the AGV docking cart 70; when the AGV docking cart 70 is idle, it performs the picking operation. First, the AGV docking cart 70 walks to the transfer docking frame 80 at the robot's post-sawing unloading station, the transfer lifting drive part 802 of the transfer docking frame 80 falls, and the gas cylinder liner workpiece 130 falls onto the bracket of the AGV docking cart 70.

[0084] The AGV docking trolley 70 carries the gas cylinder liner workpiece 130 and walks to the transfer docking rack 80 at the front end of the feeding buffer conveyor line 30, and sends a "feeding request" to the transfer docking rack 80. The transfer jacking drive 802 of the transfer docking rack 80 rises, and the gas cylinder liner workpiece 130 is transferred from the bracket of the AGV docking trolley 70 to the transfer docking rack 80. The AGV docking trolley 70 withdraws from the position of the transfer docking rack 80, and the transfer jacking drive 802 of the transfer docking rack 80 falls, transferring the gas cylinder liner workpiece 130 from the transfer docking rack 80 to the feeding buffer conveyor line 30, completing the delivery. Similarly, the shifting mechanism 40 is used to smoothly transfer the gas cylinder liner workpiece 130 at the end of the feeding buffer conveyor line 30 to the roller conveyor line 10 connected to the next process.

[0085] The automated production line also includes a PLC control system for collaboratively controlling the operating sequence of the roller conveyor line 10 , the shifting mechanism 40 , the transfer system, the robot 100 , the closing machine 50 and the sawing machine 60 .

[0086] The production line and production method of the present invention are described below using the aluminum liner of a 210L hydrogen cylinder as an example.

[0087] The 2230mm-long gas cylinder liner workpiece 130 (a 210L aluminum liner for a hydrogen cylinder) to be closed, output from the previous process, is placed on the roller conveyor line 10. After the workpiece recognition sensor detects the gas cylinder liner workpiece 130, the roller conveyor line 10 automatically operates and conveys the workpiece to the bottom of the shift mechanism 40. The workpiece recognition sensor below the shift mechanism 40 is adjusted to a distance of 1115mm (half the length of the gas cylinder liner) from the centerline of the shift mechanism 40. After the workpiece recognition sensor detects that the gas cylinder liner workpiece 130 is in place, the track conveyor line stops and waits for the shift mechanism 40 to transfer the gas cylinder liner workpiece 130.

[0088] The shift mechanism 40 grabs and lifts the gas cylinder liner workpiece 130 from the horizontal roller conveyor line 10 through the shift grasping device, and then uses the translation cylinder 406 to translate the shift grasping device together with the gas cylinder liner workpiece 130 through the slide rail slider structure. After translating to the position of the longitudinal material pick-up buffer conveyor line 20, the shift grasping device then drops the gas cylinder liner workpiece 130 onto the longitudinal material pick-up buffer conveyor line 20. During grasping, the shift grasping device drops to a height of 1020mm, and the shift servo motor 402 runs again to close the shift grasper 404 and clamp the gas cylinder liner workpiece 130. According to the middle outer diameter of the 210L aluminum liner cylinder of 383mm, the opening width of the shift grasper 404 is 403mm (outer diameter of the clamping point + 20mm).

[0089] According to the length of the 210L aluminum liner cylinder of 2230mm, the position of the workpiece identification sensor on the material retrieving and buffering conveyor line 20 is adjusted to be between 1100-1110mm from the center line of the conveyor line; according to the outer diameter size of the end of the 210L aluminum liner cylinder of 393mm, the material retrieving and buffering conveyor line 20 can buffer 7 pieces, and each conveying travel is 750mm. After the transfer docking frame 80 provided at the end of the material retrieving and buffering conveyor line 20 identifies the gas cylinder liner workpiece 130 through the workpiece identification sensor, the transfer jacking drive component 802 uses the transfer support component 803 to lift the gas cylinder liner workpiece 130 and sends a "can pick up signal" to the AGV docking trolley 70; when the AGV docking trolley 70 is idle, it performs the picking operation. First, the AGV docking trolley 70 walks between the two transfer docking components, the transfer jacking drive component 802 falls, and the gas cylinder liner workpiece 130 falls onto the bracket of the AGV docking trolley 70. The AGV docking trolley 70 moves to the loading docking frame 90 at the loading station before closing, and hands over the cylinder liner workpiece 130 to the robot 100 through the loading docking frame 90. Specifically, the loading docking frame 90 identifies the cylinder liner workpiece 130 through the workpiece recognition sensor, and the left docking jacking drive 902 and the right docking jacking drive 905 use the left docking support 903 and the right docking support 906 to lift the cylinder liner workpiece 130 to achieve the removal. When falling, the limit block 907 makes the right docking support 906 higher than the left docking support 903 after it has dropped, and the cylinder liner workpiece 130 slides towards the positioning plate 908 due to its own weight.

[0090] After receiving the signal to load the workpiece, robot 100 first drives the loading and unloading gripper to the loading docking station 90. The gripper then descends to the workpiece location. The loading and unloading servo motor then closes the gripper, clamping the cylinder liner 130. The robot 100 completes the workpiece removal process. Given the 393mm outer diameter of the 210L aluminum liner, the gripper's opening width, controlled by a limit sensor, is 413mm (maximum outer diameter + 20mm).

[0091] The cooperation process between the closing machine 50 and the robot 100 is as follows:

[0092] First end loading: the chuck of the closing machine 50 opens and sends a "loading signal" to the robot 100. After receiving the loading signal, the robot 100 takes the material from the loading docking frame 90 and sends one end of the cylinder liner workpiece 130 into the chuck of the closing machine 50; the robot 100 sends a "chuck closing request signal" to the closing machine 50, the closing machine 50 closes the chuck and sends a "chuck closed signal" to the robot 100. The loading and unloading gripper of the robot opens, and the robot 100 runs to the end of the cylinder liner workpiece 130 and clamps the cylinder liner workpiece 130 for the second time. The robot 100 A "chuck opening request signal" is sent to the closing machine 50, the closing machine 50 opens the chuck and sends a "chuck opened signal" to the robot 100, the robot 100 again feeds the cylinder liner workpiece 130 into the chuck until the cylinder exposes 362mm of the chuck end face, the robot 100 again sends a "chuck secondary closing request signal" to the closing machine 50, the closing machine 50 closes the chuck and sends a "chuck secondary closed signal" to the robot 100, the robot's loading and unloading grippers open, the robot 100 runs to a safe position and sends a "loading completion signal" to the closing machine 50.

[0093] First end closing: the closing machine 50 automatically executes the closing procedure (when the first closing machine 50 is closing, the robot 100 feeds the second closing machine 50).

[0094] U-turn: After the closing program at one end is completed, the closing machine 50 sends a "closing completion signal" to the robot 100, and the robot 100 runs to the end of the cylinder liner workpiece 130 and clamps the cylinder liner workpiece 130. The robot 100 sends a "chuck opening request signal" to the closing machine 50, and the closing machine 50 chuck opens and sends a "chuck opened signal" to the robot 100. The robot 100 takes a section of the cylinder liner workpiece 130 out of the chuck and sends a "chuck opening request signal" to the closing machine 50. The chuck of the closing machine 50 is closed and sends a “chuck closed signal” to the robot 100. The robot 100 runs to the chuck and clamps the gas cylinder liner workpiece 130 again. The robot 100 sends a “request chuck secondary opening signal” to the closing machine 50. The chuck of the closing machine 50 is opened and sends a “chuck secondary opened signal” to the robot 100. The robot 100 takes the gas cylinder liner workpiece 130 out of the chuck and rotates the gas cylinder liner workpiece 130 180 degrees to turn around.

[0095] Second end loading: (The basic logic action is the same as the first end loading, but there is no need to pick up the material) After completing the U-turn, the robot 100 sends the cylinder liner workpiece 130 into the chuck of the closing machine 50 and sends a "chuck closing request signal" to the closing machine 50. The closing machine 50 closes the chuck and sends a "chuck closed signal" to the robot 100. The robot's loading and unloading grippers are opened, and the robot 100 runs to the end of the cylinder liner workpiece 130 and clamps the cylinder liner workpiece 130 for the second time. The robot 100 sends a "chuck closing request signal" to the closing machine 50. The closing machine 50 opens the chuck and sends a "chuck opened signal" to the robot 100. The robot 100 feeds the gas cylinder liner workpiece 130 into the chuck again until the cylinder is exposed to 362mm of the chuck end face. The robot 100 again sends a "chuck secondary closing signal request" to the closing machine 50. The closing machine 50 closes the chuck and sends a "chuck secondary closing signal" to the robot 100. The loading and unloading grippers of the robot are opened, and the robot 100 runs to a safe position and sends a "loading completion signal" to the closing machine 50.

[0096] Second end closing: the closing machine 50 automatically executes the closing procedure again (when the first closing machine 50 is performing the second end closing operation, the robot 100 turns the workpiece on the second closing machine 50).

[0097] Unloading: (The logic is the same as that of turning around, but there is no turning around at the end) After the second end closing program is completed, the closing machine 50 sends a "closing completion signal" to the robot 100, and the robot 100 runs to the end of the gas cylinder liner workpiece 130 and clamps the gas cylinder liner workpiece 130. The robot 100 sends a "chuck opening request signal" to the closing machine 50, the closing machine 50 chuck opens and sends a "chuck opened signal" to the robot 100, and the robot 100 takes a section of the gas cylinder liner workpiece 130 out of the chuck and unloads it to the closing machine 50. The “chuck closing request signal” is sent, the chuck of the closing machine 50 is closed and the “chuck closed signal” is sent to the robot 100, the robot 100 runs to the chuck and clamps the gas cylinder liner workpiece 130 again, the robot 100 sends the “chuck secondary opening request signal” to the closing machine 50, the chuck of the closing machine 50 is opened and the “chuck secondary opened signal” is sent to the robot 100, the robot 100 takes the gas cylinder liner workpiece 130 out of the chuck, completes the closing and unloading, and sends the “unloading completion signal” to the closing machine 50.

[0098] In the above process, the weight of the closing section of the 210L aluminum liner is 9kg. Based on the equal mass before and after closing, it is calculated that the required length of the 210L aluminum liner cylinder is 282mm. Then, a safety distance of 80mm is reserved from the rotating wheel to the chuck. Therefore, the distance between the end face of the cylinder exposed to the chuck is 362mm.

[0099] After the two ends are closed, the robot 100 grabs the gas cylinder liner workpiece 130 and loads and unloads it from the closing machine 50. Then the robot 100 clamps the gas cylinder liner workpiece 130 and puts it into the cooling barrel 120, stays for 10 seconds, and the robot 100 places the workpiece under the sawing machine 60 and sends a "sawing signal" to the sawing machine 60. The sawing machine 60 saws the bottle mouth, and sends a "sawing completion signal" to the robot 100 after the sawing is completed; the robot 100 puts the second end of the gas cylinder liner workpiece 130 into the cooling barrel 120, stays for 10 seconds, and the robot 100 places the gas cylinder liner workpiece 130 under the sawing machine 60 and sends a "sawing signal" to the sawing machine 60. The sawing machine 60 saws the bottle mouth, and sends a "sawing completion signal" to the robot 100 after the sawing is completed.

[0100] After the bottle mouths at both ends of the gas cylinder liner workpiece 130 are sawed, the robot 100 places the gas cylinder liner workpiece 130 on the V-shaped support block of the transfer docking frame 80 on the robot's post-sawing unloading station. After the workpiece identification sensor detects the workpiece, the lifting cylinder lifts the workpiece and sends a "can pick up signal" to the AGV docking cart 70; when the AGV docking cart 70 is idle, it performs the picking operation. First, the AGV docking cart 70 walks to the transfer docking frame 80 at the robot's post-sawing unloading station, the transfer lifting drive part 802 of the transfer docking frame 80 falls, and the gas cylinder liner workpiece 130 falls onto the bracket of the AGV docking cart 70.

[0101] The AGV docking trolley 70 carries the gas cylinder liner workpiece 130 and walks to the transfer docking rack 80 at the front end of the feeding buffer conveyor line 30, and sends a "feeding request" to the transfer docking rack 80. The transfer jacking drive component 802 of the transfer docking rack 80 rises, and the gas cylinder liner workpiece 130 is transferred from the bracket of the AGV docking trolley 70 to the transfer docking rack 80. The AGV docking trolley 70 withdraws from the position of the transfer docking rack 80, and the transfer jacking drive component 802 of the transfer docking rack 80 falls, transferring the gas cylinder liner workpiece 130 from the transfer docking rack 80 to the feeding buffer conveyor line 30, completing the delivery.

[0102] The feeding buffer conveyor line 30 conveys the gas cylinder liner workpiece 130 to the position below the shifting mechanism 40; after the workpiece identification sensor at the position below the shifting mechanism 40 detects the gas cylinder liner workpiece 130, the shifting mechanism 40 grabs and lifts the gas cylinder liner workpiece 130 from the horizontal roller conveyor line 10 through the shifting grasping device, and then uses the translation cylinder 406 to translate the shifting grasping device together with the gas cylinder liner workpiece 130 through the slide rail slider structure. After translating to the position of the longitudinal roller conveyor line 10, the shifting grasping device then drops the gas cylinder liner workpiece 130 onto the longitudinal roller conveyor line 10, and the roller conveyor line 10 sends the gas cylinder liner workpiece 130 to the next process.

[0103] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0104] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An automated production line for necking the inner liner of a high-pressure gas cylinder, comprising: A roller conveyor line, which is docked with the previous process and the next process to convey the inner liner workpiece of the gas cylinder; A buffer conveying system, which includes a material-taking buffer conveying line and a material-feeding buffer conveying line arranged longitudinally, and is used for buffering and transferring the inner liner workpiece of the gas cylinder; A displacement mechanism, which straddles between the roller conveyor line and the buffer conveying system to realize the lateral-longitudinal space transfer of the inner liner workpiece of the gas cylinder; Two necking machines and one sawing machine, which are arranged in a "product" shape layout and are used for necking and sawing the inner liner workpiece of the gas cylinder; A transfer system, which includes an AGV docking trolley and an AGV docking rack group, and is used for undertaking the交接 and transfer of the inner liner workpiece of the gas cylinder; A robot, which is arranged close to the necking machine, and its working range covers the necking machine and the sawing machine, and is capable of performing the operation of turning the inner liner workpiece of the gas cylinder during necking.

2. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 1, characterized in that: The roller conveyor line is of a roller conveyor structure, and both the material-taking buffer conveying line and the material-feeding buffer conveying line are of a chain conveyor structure; a plurality of inner liner workpieces of the gas cylinder are arranged on the material-taking buffer conveying line and the material-feeding buffer conveying line.

3. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 1, characterized in that: The displacement mechanism includes a support frame and a displacement grabbing device and a translation driving mechanism installed on the support frame; the displacement grabbing device includes a displacement grabbing component and a displacement lifting component; the displacement lifting component is connected with the displacement grabbing component; the translation driving mechanism drives the displacement grabbing device to move horizontally; the displacement lifting component drives the displacement grabbing component to lift and lower, and the displacement grabbing component acts to grab the inner liner workpiece of the gas cylinder.

4. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 1 is characterized in that: The AGV docking rack group includes a transfer docking rack and a loading docking rack; there are three groups of the transfer docking racks, which are respectively arranged at the end of the material-taking buffer conveying line, the post-sawing blanking station of the robot, and the front end of the material-feeding buffer conveying line, and are respectively used for the transfer of the to-be-processed material-taking of the inner liner workpiece of the gas cylinder, the sawing blanking transfer, and the post-processing material-feeding transfer; the loading docking rack is arranged at the pre-necking loading station of the robot and is used for transferring the inner liner workpiece of the gas cylinder on the AGV docking trolley to the robot.

5. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 4, characterized in that: The transfer docking rack includes two groups of transfer docking components, and each group of transfer docking components includes a fixed bracket, a transfer lifting driving part installed on the fixed bracket, and a transfer support part. The transfer lifting driving part can drive the transfer support part to lift and lower to perform lifting and taking parts and lowering and placing parts.

6. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 4, characterized in that: The loading docking rack includes a left docking rack component and a right docking rack component. Among them, the left docking rack component includes a left docking bracket, a left docking lifting driving part, and a liftable left docking support part; the right docking rack component includes a right docking bracket, a right docking lifting driving part, and a liftable right docking support part; a limiting block for limiting the right docking rack component is arranged on the right docking bracket, and a positioning plate is arranged on the left docking bracket; the limiting block makes the right docking support part higher than the lowered left docking support part after the right docking support part descends, and the inner liner workpiece of the gas cylinder slides towards the positioning plate due to its own weight; both the left docking support part and the right docking support part use a V-shaped groove formed by rollers to support the inner liner workpiece of the gas cylinder.

7. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 1, characterized in that: The robot has a loading and unloading grabbing device, which includes a main frame, a loading and unloading drive mechanism installed on the main frame, and a loading and unloading grabber; the loading and unloading drive mechanism drives the loading and unloading grabber to move to grab the gas cylinder liner workpiece for loading and unloading.

8. The automated production line for closing the inner shell of a high-pressure gas cylinder according to claim 1, characterized in that: It also includes a cooling device arranged close to the sawing machine, the cooling device includes a cooling barrel and a water supply barrel connected by a water channel, and an automatic water supply ball valve is provided in the water supply barrel, which automatically supplies water when the water level is lower than a threshold.

9. The automated production line for closing the liner of a high-pressure gas cylinder according to claim 1, characterized in that: It also includes a PLC control system for collaboratively controlling the operating sequence of the roller conveyor line, shift mechanism, transfer system, robot, closing machine and sawing machine.

10. A method for producing a high-pressure gas cylinder liner, characterized in that: The production method is implemented based on the automated production line according to any one of claims 1 to 9; the production method comprises the following steps: The gas cylinder liner workpiece output from the previous process is transferred to the material retrieving buffer conveyor line via the roller conveyor line and the shifting mechanism; the transfer system transfers the gas cylinder liner workpiece to the robot; the robot performs the operations of loading the sealing machine, turning the gas cylinder liner workpiece around, and unloading the sealing; the gas cylinder liner workpiece sealed by the sealing machine is transferred to the sawing machine for double-end sawing; the sawed gas cylinder liner workpiece is transferred to the feeding buffer conveyor line via the transfer system, and finally transferred to the roller conveyor line through the shifting mechanism to be sent to the next process.

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