Forming device and method of a hydrogen storage cylinder with a hydrogen blocking liner

Abstract

The application discloses a forming device and method of a hydrogen storage bottle with a hydrogen blocking inner container, and relates to the technical field of forming a hydrogen storage bottle. The forming device is provided with a rolling mechanism on the bottom surface of the horizontal beam of the arch-shaped frame, which is used for rolling the bottle body and the bottle neck of the aluminum alloy bottle body. The table surface of the machine table is provided with a supporting mechanism used for supporting the bottle body. The right end of the machine table is fixedly provided with a bracket located on the right side of the supporting mechanism. The bracket is fixedly provided with a laser welding head vertically upward. The left side wall of the arch-shaped frame is provided with a tooling and driving mechanism used for positioning the aluminum alloy bottle body, for tooling the aluminum alloy bottle body and the hydrogen blocking inner container together, and for driving the aluminum alloy bottle body and the hydrogen blocking inner container to synchronously rotate. The top and bottom walls of the rotating seat are both provided with a holding assembly. The top and bottom walls of the rotating seat are provided with an inner supporting assembly. The application has the advantages of greatly improving the forming efficiency and the forming quality of the hydrogen storage bottle.

Description

Technical Field

[0001] This invention relates to the technical field of molding hydrogen storage bottles, and in particular to a molding apparatus and method for a hydrogen storage bottle with a hydrogen-barrier inner liner. Background Technology

[0002] Hydrogen storage cylinders are used to store the prepared liquid hydrogen. Since liquid hydrogen itself has strong permeability, if ordinary steel cylinders are used to hold liquid hydrogen, the liquid hydrogen will seep out of the steel cylinders, resulting in leakage and a low safety of hydrogen storage.

[0003] Therefore, a hydrogen storage bottle A with a hydrogen-barrier inner liner has appeared on the market. The structure of hydrogen storage bottle A is as follows: Figures 1-2 As shown, the hydrogen storage cylinder A includes an aluminum alloy cylinder body, a hydrogen-barrier inner liner, and an aluminum alloy end cap 1. The aluminum alloy cylinder body is composed of a neck 2 and a body 3 connected in sequence. An arc-shaped shoulder 4 is formed between the inner wall of the neck 2 and the inner wall of the body 3, and the bottom of the body 3 is open. The hydrogen-barrier inner liner is composed of a small-diameter inner liner 5 and a large-diameter inner liner 6 connected in sequence. The bottom of the large-diameter inner liner 6 is closed. The small-diameter inner liner 5 is embedded in the neck 2 of the aluminum alloy cylinder body, and the large-diameter inner liner 6 is embedded in the body 3 of the aluminum alloy cylinder body.

[0004] The aluminum alloy end cap 1 is welded to the bottom port of the bottle body 3, and an annular weld scar 7 is formed between the aluminum alloy end cap 1 and the bottle body 3. The large-diameter inner liner 6 of the hydrogen-blocking inner liner is restricted between the aluminum alloy end cap 1 and the arc-shaped shoulder 4 to fix the hydrogen-blocking inner liner.

[0005] The hydrogen storage cylinder A contains a hydrogen-blocking liner for holding liquid hydrogen. The liner is made of a dense and rigid material, which effectively prevents the penetration of liquid hydrogen. The neck 2 and body 3 of the aluminum alloy cylinder are used to block the impact of external forces, thus protecting the small-diameter inner liner 5 and the large-diameter inner liner 6 of the hydrogen-blocking liner respectively.

[0006] Workers in a workshop use welding fixtures and a laser welding machine to form a hydrogen storage cylinder A with a hydrogen-barrier inner liner. The structure of the welding fixture is as follows: Figure 3 As shown, it includes a tooling table 8, a fixing frame 9 fixed on the top surface of the tooling table 8, and a cylindrical platform 10. A threaded column 11 is fixed on the top surface of the fixing frame 9, and a pressure plate 12 is threaded onto the threaded column 11.

[0007] The specific forming method for the hydrogen storage cylinder A, using this welding fixture in conjunction with a laser welding machine, is as follows:

[0008] S1, the worker takes out a... Figures 4-5 The aluminum alloy end cap 1 shown is placed flat on the top surface of the cylindrical platform 10 of the welding fixture, as shown. Figure 6 As shown;

[0009] S2, The worker takes out a... Figures 7-8 The aluminum alloy bottle shown and as Figures 9-10 As shown, the smaller diameter inner liner 5 is inserted into the neck 2 of the aluminum alloy bottle body from bottom to top, while the larger diameter inner liner 6 is inserted into the body 3 of the aluminum alloy bottle body from bottom to top, with the insertion direction as shown. Figure 11 As indicated by the middle arrow;

[0010] S3. The worker places the bottle body 3 of the aluminum alloy bottle on the top surface of the aluminum alloy end cap 1, such as... Figure 12 As shown, ensure that the outer cylindrical surface of the bottle body 3 is flush with the outer cylindrical surface of the aluminum alloy end cap 1;

[0011] S4. The worker screws the auxiliary tooling's pressure plate 12 downwards so that the pressure plate 12 presses against the top surface of the aluminum alloy bottle neck 2, as shown. Figure 13 As shown, the aluminum alloy bottle body is fixed between the aluminum alloy end cap 1 and the pressure plate 12.

[0012] S5. The worker aligns the laser welding head 13 of the laser welding machine with the contact point between the bottle body 3 and the aluminum alloy end cap 1 of the aluminum alloy bottle. Figure 14 As shown;

[0013] Then the laser welding machine is turned on, and the laser welding head 13 emits a laser beam to irradiate the contact point between the bottle body 3 and the aluminum alloy end cap 1, so as to initially weld the contact point between the bottle body 3 and the aluminum alloy end cap 1.

[0014] Then, the laser welding head 13 moves circumferentially around the bottle body 3, gradually welding the bottle body 3 to the aluminum alloy end cap 1 together. After the laser welding head 13 completes one revolution, the bottle body 3 and the aluminum alloy end cap 1 are welded together, forming an annular weld scar 7 between the bottle body 3 and the aluminum alloy end cap 1. Figures 15-16 As shown, a hydrogen storage bottle A with a hydrogen barrier liner is finally formed, wherein the large-diameter inner liner 6 of the hydrogen barrier liner is restricted between the arc-shaped shoulder 4 of the aluminum alloy bottle body and the aluminum alloy end cap 1.

[0015] S6. The worker rotates the pressure plate 12 upwards to separate it from the neck 2 of the hydrogen storage bottle A. Then, the formed hydrogen storage bottle A is removed from the cylindrical platform 10. The structure of the hydrogen storage bottle A is as follows: Figures 1-2 As shown;

[0016] S7. Workers repeat steps S1 to S6 multiple times to form multiple hydrogen storage bottles A with hydrogen-barrier inner liner.

[0017] However, although workers can produce the required number of hydrogen storage cylinders A by using this welding fixture in conjunction with a laser welding machine, the following technical defects still exist:

[0018] I. In step S5, the worker needs to first align the laser welding head 13 of the laser welding machine with the contact point between the bottle body 3 and the aluminum alloy end cap 1 of the aluminum alloy bottle, and then make the laser welding head 13 move around the bottle body 3 in a circumferential direction to weld the bottle body 3 and the aluminum alloy end cap 1 together, so as to finally form a hydrogen storage bottle A. The entire welding operation is done manually by the worker, which undoubtedly increases the forming time of the hydrogen storage bottle A and reduces the forming efficiency of the hydrogen storage bottle.

[0019] II. Because the large-diameter inner liner 6 of the hydrogen storage bottle A is merely confined between the arc-shaped shoulder 4 and the aluminum alloy end cap 1, when workers use filling equipment to fill liquid hydrogen into the large-diameter inner liner 6 through the small-diameter inner liner 5, the impact of the liquid hydrogen will cause the large-diameter inner liner 6 to shake continuously within the bottle body 3. The shaking large-diameter inner liner 6 will collide with the bottle body 3 and crack. At the same time, it will also cause the small-diameter inner liner 5 to shake continuously within the neck 2. The shaking small-diameter inner liner 5 will collide with the neck 2 and crack. However, the process requires that there be no cracks on the surface of the small-diameter inner liner 5 and the large-diameter inner liner 6 of the hydrogen-barrier inner liner. Therefore, this molding method reduces the molding quality of the hydrogen storage bottle.

[0020] Therefore, there is an urgent need for a molding device and method that can greatly improve the molding efficiency and quality of hydrogen storage cylinders. Summary of the Invention

[0021] The purpose of this invention is to overcome the shortcomings of the prior art and provide a molding apparatus and method for a hydrogen storage bottle with a hydrogen-barrier inner liner.

[0022] The objective of this invention is achieved through the following technical solution: a forming device for a hydrogen storage bottle with a hydrogen-blocking inner liner, comprising a machine base fixed on a pad, an arched frame fixed between the machine base and the pad, and a rolling mechanism set on the bottom surface of the crossbeam of the arched frame for rolling the bottle body and neck of the aluminum alloy bottle. A support mechanism for supporting the bottle body is provided on the table of the machine base, and the support mechanism is located directly below the rolling mechanism. A bracket located on the right side of the support mechanism is fixed at the right end of the machine base, and a vertically upward laser welding head is fixed inside the bracket.

[0023] The left side wall of the arched frame is provided with a tooling and driving mechanism for positioning the aluminum alloy bottle, for assembling the aluminum alloy bottle and the hydrogen-blocking inner liner together, and for driving the aluminum alloy bottle and the hydrogen-blocking inner liner to rotate synchronously. The tooling and driving mechanism includes a drive motor fixed on the left side wall of the arched frame. The output shaft of the drive motor passes through the left side wall to the right and is connected to a main shaft at its extended end. A rotating seat is fixed at the right end of the main shaft.

[0024] The right end face of the rotating seat is provided with a guide blind hole. The diameter of the guide blind hole is equal to the outer diameter of the bottleneck of the aluminum alloy bottle. An annular retaining ring is fixed on the inner wall of the guide blind hole. A clamping component is provided on the top and bottom walls of the rotating seat. An inner support component is provided between the top and bottom walls of the rotating seat.

[0025] The right side wall of the arched frame is provided with a positioning and pushing mechanism for positioning and pushing the aluminum alloy end cap. The positioning and pushing mechanism includes a pushing cylinder fixed on the right side wall of the arched frame. The piston rod of the pushing cylinder extends to the left through the right side wall, and a push plate is fixed on the extended end. A positioning card seat is rotatably installed on the left end face of the push plate via a rotating shaft. A circular slot is opened on the left end face of the positioning card seat. The circular slot matches the outer contour of the aluminum alloy end cap, and the depth of the circular slot is less than the thickness of the aluminum alloy end cap.

[0026] The support mechanism includes a frame fixed to the machine table, and two rollers distributed front and rear are rotatably installed inside the frame.

[0027] The connector of the laser welding head is connected to the laser welding machine via a wire.

[0028] The roller pressing mechanism includes a frame fixed to the bottom surface of the arched beam. A roller pressing cylinder is fixed inside the frame and located on its bottom edge. The piston rod of the roller pressing cylinder passes downward through the bottom edge of the frame, and a rigid connecting frame is fixed to its extension end. A first roller and a second roller are fixed to the left and right ends of the rigid connecting frame, respectively, with the second roller located above the first roller.

[0029] Multiple guide posts are fixed on the top surface of the rigid connecting frame. Each guide post slides upward through the bottom edge of the frame to guide the rigid connecting frame.

[0030] The clamping assembly located above the rotating seat includes a through groove opened in the top wall of the rotating seat and an L-plate fixed on the top wall of the rotating seat. The through groove is located on the right side of the annular retaining ring and is connected to the guide blind hole. A clamping block is slidably installed in the through groove. An arc-shaped groove is opened on the bottom surface of the clamping block. A threaded hole through the arc-shaped groove is opened in the clamping block. A locking screw is rotatably installed in the L-plate. The threaded section of the locking screw is threadedly connected to the threaded hole of the clamping block.

[0031] The internal support assembly includes a bidirectional lead screw rotatably mounted between the top and bottom walls of the rotating seat, and a smooth rod fixed between the top and bottom walls of the rotating seat. Both the bidirectional lead screw and the smooth rod are located on the left side of the annular retaining ring. The right end faces of the two movable nuts connected to the forward and reverse external threads of the bidirectional lead screw are respectively provided with clamping rods that pass through the central hole of the annular retaining ring to the right. Guide sleeves are fixed on the left side walls of the two movable nuts, and the guide sleeves are fitted onto the smooth rod. A handwheel is fixedly connected to the top end of the bidirectional lead screw.

[0032] The forming device also includes a controller, which is electrically connected to the laser welding machine, drive motor, push cylinder and roller cylinder via signal lines.

[0033] A method for molding a hydrogen storage bottle with a hydrogen-barrier inner liner, comprising the following steps:

[0034] S1. The worker takes out an aluminum alloy bottle and a hydrogen-blocking inner liner. The smaller diameter inner liner of the hydrogen-blocking inner liner is inserted into the neck of the aluminum alloy bottle from bottom to top. At the same time, the larger diameter inner liner of the hydrogen-blocking inner liner is inserted into the body of the aluminum alloy bottle from bottom to top.

[0035] S2. Using tooling and a drive mechanism, the aluminum alloy bottle body and the hydrogen-barrier inner liner are assembled together. The specific operating steps are as follows:

[0036] S21. The worker places the bottle body of the aluminum alloy bottle in the area enclosed by the two rollers of the support mechanism. At this time, the bottle body is in contact with the two rollers. At the same time, the bottleneck of the aluminum alloy bottle is directly opposite to the guide blind hole of the rotating seat of the tooling and drive mechanism. The bottle body of the aluminum alloy bottle is directly opposite to the circular slot of the positioning card seat of the positioning and pushing mechanism.

[0037] S22. The worker pushes the bottle body to the left so that the bottleneck enters the guide blind hole of the rotating seat. When the worker can no longer push the bottle body to the left, it means that the bottleneck is blocked by the annular retaining ring in the rotating seat, thus achieving the positioning of the aluminum alloy bottle body and the hydrogen-blocking inner liner. At this time, the bottleneck of the aluminum alloy bottle body is just between the clamping blocks of the two clamping components. At the same time, the small-diameter inner liner of the hydrogen-blocking inner liner is just outside the two clamping rods of the inner support component. At the same time, the bottleneck is just directly below the first roller of the roller pressing mechanism, and the bottle body is just directly below the second roller of the roller pressing mechanism.

[0038] S23. The worker screws in the locking screws of the two clamping components. The locking screws drive the clamping blocks to move along the through groove toward the bottleneck. When the worker can no longer screw in the locking screws, the bottleneck of the aluminum alloy bottle is just clamped between the two clamping blocks.

[0039] S24. The worker rotates the handwheel on the double-acting screw, which drives the double-acting screw to rotate. Both moving nuts on the double-acting screw move towards the inner wall of the small-diameter inner liner of the hydrogen-blocking liner. The moving nuts drive the clamping rods to move towards the inner wall of the small-diameter inner liner. When the worker can no longer rotate the handwheel, the two clamping rods just fix the small-diameter inner liner of the hydrogen-blocking liner in place, thus finally achieving the goal of fixing the aluminum alloy bottle body and the hydrogen-blocking liner together using tooling and drive mechanism.

[0040] S3. Positioning and installation of aluminum alloy end caps: The worker takes out an aluminum alloy end cap and inserts it from left to right into the circular slot of the positioning and pushing mechanism. Since the circular slot matches the outer contour of the aluminum alloy end cap and the depth of the circular slot is less than the thickness of the aluminum alloy end cap, the positioning and installation of the aluminum alloy end cap is achieved.

[0041] S4. The piston rod of the push cylinder of the control positioning and pushing mechanism extends to the left, the piston rod drives the push plate to move to the left, the push plate drives the rotating shaft and the positioning card to move to the left synchronously, and thus drives the aluminum alloy end cap to move towards the bottle body synchronously; when the piston rod of the push cylinder is fully extended, the aluminum alloy end cap just abuts against the right end face of the bottle body. At this time, the contact point between the aluminum alloy end cap and the bottle body is just above the laser welding head.

[0042] S5. Weld the bottle body and the aluminum alloy end cap together. The specific steps are as follows:

[0043] S51. The worker starts the laser welding machine by controlling the controller. The laser welding head connected to it emits a laser beam. The laser beam irradiates the contact point between the bottle body and the aluminum alloy end cap, thus starting the welding of the contact point between the bottle body and the aluminum alloy end cap.

[0044] S52, the drive motor of the control tooling and drive mechanism starts, the drive motor drives the main shaft to rotate, the main shaft drives the rotating seat to rotate synchronously, the rotating seat drives the clamping component and the inner support component to rotate synchronously, and then drives the bottle neck and the small diameter inner liner to rotate synchronously. Among them, the bottle neck drives the bottle body to rotate synchronously, the bottle body drives the aluminum alloy end cap against it to rotate synchronously, the aluminum alloy end cap drives the positioning card seat to rotate synchronously, and at the same time, the small diameter inner liner drives the large diameter inner liner to rotate synchronously.

[0045] As the bottle body and aluminum alloy end cap rotate, the laser welding head gradually welds the bottle body and aluminum alloy end cap together.

[0046] After the bottle body and aluminum alloy end cap rotate 360°, the controller shuts down the laser welding machine, thus finally achieving the welding of the bottle body and aluminum alloy end cap into one piece. After welding, an annular weld scar is formed between the bottle body and the aluminum alloy end cap. At the same time, the large-diameter inner liner of the hydrogen-blocking inner liner is just confined between the arc-shaped shoulder of the aluminum alloy bottle body and the aluminum alloy end cap.

[0047] S6. Roll the bottle neck and body using a roller pressing mechanism:

[0048] The piston rod of the roller pressing cylinder controlling the roller pressing mechanism extends downward, and the piston rod drives the rigid connecting frame to move downward. The rigid connecting frame drives the first roller and the second roller to move downward synchronously. The first roller moves towards the bottleneck of the bottle that is in a rotating state, while the second roller moves towards the body of the bottle that is in a rotating state.

[0049] As the piston rod of the roller cylinder continues to extend downward, the first roller presses the rotating bottleneck downward, causing the material of the bottleneck to deform radially and also presses the small-diameter inner liner that is rotating. At the same time, the second roller presses the rotating bottle body downward, causing the material of the bottle body to deform radially and also presses the large-diameter inner liner that is rotating.

[0050] When the piston rod of the roller cylinder is fully extended, a small annular convex bulge can be extruded and formed on the inner wall of the bottleneck and the inner wall of the small diameter inner liner. The two small annular convex bulges cover each other. At the same time, a large annular convex bulge can be extruded and formed on the inner wall of the bottle body and the inner wall of the large diameter inner liner. The two large annular convex bulges cover each other, thus finally forming a hydrogen storage bottle B with a hydrogen barrier inner liner.

[0051] S7. The specific steps for removing hydrogen storage cylinder B are as follows:

[0052] S71. The piston rod of the roller pressing cylinder of the worker-controlled roller pressing mechanism retracts upward, the piston rod drives the rigid connecting frame to move upward, and the rigid connecting frame drives the first roller and the second roller to move upward synchronously, so that the first roller and the second roller are both reset.

[0053] S72. The drive motor of the control tooling and drive mechanism is turned off. At this time, the neck, body, small-diameter inner liner and large-diameter inner liner of hydrogen storage cylinder B all stop rotating.

[0054] S73. The piston rod of the push cylinder of the worker-controlled positioning and pushing mechanism retracts to the right, the piston rod drives the push plate to move to the right, and the push plate drives the positioning card to move away from the aluminum alloy end cap of the hydrogen storage bottle B.

[0055] S74. The worker loosens the locking screws of the two clamping components. The locking screws drive the clamping blocks to move away from the bottleneck of the hydrogen storage cylinder B. At this time, the bottleneck is no longer clamped between the clamping blocks of the two clamping components.

[0056] S75. The worker rotates the handwheel of the inner support assembly in the opposite direction. The handwheel drives the double-acting screw to rotate in the opposite direction. The two moving nuts on the double-acting screw move towards the inner wall of the small-diameter inner liner away from the hydrogen storage bottle B. The two clamps no longer fix the inner support of the small-diameter inner liner.

[0057] S76. The worker pulls the body of hydrogen storage cylinder B to the right, and the cylinder body drives the neck out of the guide blind hole of the rotating seat. Then the worker removes hydrogen storage cylinder B from the two rollers of the support mechanism.

[0058] S8. Workers can repeat steps S1 to S7 multiple times to form multiple hydrogen storage bottles B with hydrogen-barrier inner liner.

[0059] The present invention has the following advantages: it greatly improves the forming efficiency of hydrogen storage bottles and greatly improves the forming quality of hydrogen storage bottles. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the structure of a hydrogen storage bottle A with a hydrogen-barrier inner liner, based on existing technology.

[0061] Figure 2 for Figure 1 Main section diagram;

[0062] Figure 3 This is a schematic diagram of the structure of welding fixtures in the prior art;

[0063] Figure 4 This is a schematic diagram of the aluminum alloy end cap structure;

[0064] Figure 5 for Figure 4 Main section diagram;

[0065] Figure 6 A schematic diagram showing a worker placing an aluminum alloy end cap flat on the top surface of a cylindrical platform of a welding fixture.

[0066] Figure 7 This is a structural diagram of an aluminum alloy bottle.

[0067] Figure 8 for Figure 7 Main section diagram;

[0068] Figure 9 This is a schematic diagram of the hydrogen-barrier inner liner;

[0069] Figure 10 for Figure 9 Main section diagram;

[0070] Figure 11 A schematic diagram showing workers embedding a large-diameter hydrogen-barrier inner liner into the body of an aluminum alloy bottle.

[0071] Figure 12 For workers Figure 11 A schematic diagram showing the aluminum alloy bottle body placed on the top surface of the aluminum alloy end cap;

[0072] Figure 13 This is a diagram showing a worker pressing a pressure plate onto the top surface of the neck of an aluminum alloy bottle.

[0073] Figure 14 This is a diagram showing a worker aligning the laser welding head with the point where the bottle body contacts the aluminum alloy end cap.

[0074] Figure 15 A schematic diagram showing the formation of a ring-shaped weld scar between the bottle body and the aluminum alloy end cap;

[0075] Figure 16 for Figure 15 Enlarged view of part C;

[0076] Figure 17 This is a schematic diagram of the structure of the present invention;

[0077] Figure 18 for Figure 17 A schematic diagram of the partial cross-section;

[0078] Figure 19 This is a schematic diagram of the tooling and drive mechanism of the present invention;

[0079] Figure 20 for Figure 19 A schematic diagram of direction D;

[0080] Figure 21 for Figure 20 Main section diagram;

[0081] Figure 22 This is a schematic diagram of the support mechanism of the present invention;

[0082] Figure 23 This is a schematic diagram of the roller pressing mechanism of the present invention;

[0083] Figure 24 This is a schematic diagram of the positioning and pushing mechanism of the present invention;

[0084] Figure 25 A schematic diagram showing the placement of the aluminum alloy bottle body within the area enclosed by the two rollers of the support mechanism;

[0085] Figure 26 A schematic diagram illustrating the positioning of the aluminum alloy bottle body and the hydrogen-barrier inner liner;

[0086] Figure 27 A schematic diagram showing the bottleneck of an aluminum alloy bottle being held tightly between two clamping blocks;

[0087] Figure 28 A schematic diagram showing how two clamps secure the small-diameter inner liner of the hydrogen-blocking inner liner.

[0088] Figure 29 A schematic diagram illustrating the positioning and installation of the aluminum alloy end cap;

[0089] Figure 30 This is a schematic diagram showing the aluminum alloy end cap resting against the right end face of the bottle body.

[0090] Figure 31 A schematic diagram showing the formation of a ring-shaped weld scar between the bottle body and the aluminum alloy end cap;

[0091] Figure 32A schematic diagram illustrating the process of extruding a large annular convex bulge onto both the inner wall of the bottle and the inner wall of the large-diameter inner liner.

[0092] Figure 33 This is a schematic diagram showing that both the first and second rollers have been reset.

[0093] Figure 34 A diagram illustrating a worker pulling the body of hydrogen storage cylinder B to the right;

[0094] Figure 35 This is a schematic diagram of the structure of the formed hydrogen storage bottle B;

[0095] In the picture:

[0096] 1-Aluminum alloy end cap, 2-Neck, 3-Bottle body, 4-Arched shoulder, 5-Small diameter inner liner, 6-Large diameter inner liner, 7-Annular weld scar; 8-Tooling table, 9-Fixing frame, 10-Cylindrical platform, 11-Threaded column, 12-Pressure plate, 13-Laser welding head;

[0097] 14-Plate, 15-Machine base, 16-Arch frame, 17-Roller pressing mechanism, 18-Support mechanism, 19-Bracket;

[0098] 20-Tooling and drive mechanism, 21-Drive motor, 22-Main shaft, 23-Rotating seat, 24-Guide blind hole, 25-Annular retaining ring;

[0099] 26-Positioning and pushing mechanism, 27-Pushing cylinder, 28-Push plate, 29-Rotating shaft, 30-Positioning bracket, 31-Circular slot;

[0100] 32-Frame, 33-Drum;

[0101] 34-Frame, 35-Roller cylinder, 36-Rigid connecting frame, 37-First roller, 38-Second roller;

[0102] 39-through groove, 40-clamping block, 41-threaded hole, 42-locking screw, 43-double-acting screw, 44-smooth rod, 45-moving nut, 46-clamping rod, 47-handwheel;

[0103] 48 - Small annular convex hull, 49 - Large annular convex hull. Detailed Implementation

[0104] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0105] like Figures 17-24As shown, a forming apparatus for a hydrogen storage bottle with a hydrogen-barrier inner liner includes a machine platform 15 fixed on a pad 14, an arched frame 16 fixed between the machine platform 15 and the pad 14, and a rolling mechanism 17 disposed on the bottom surface of the crossbeam of the arched frame 16 for rolling the bottle body 3 and the neck 2 of the aluminum alloy bottle. A support mechanism 18 for supporting the bottle body 3 is disposed on the table surface of the machine platform 15, and the support mechanism 18 is located directly below the rolling mechanism 17. A bracket 19 located to the right of the support mechanism 18 is fixed at the right end of the machine platform 15. A vertically upward laser welding head 13 is fixed inside the bracket 19, and the connector of the laser welding head 13 is connected to a laser welding machine via a wire. The support mechanism 18 includes a frame 32 fixed on the table surface of the machine platform 15, and two front-to-back distributed rollers 33 are rotatably mounted inside the frame 32.

[0106] The left side wall of the arched frame 16 is provided with a tooling and drive mechanism 20 for positioning the aluminum alloy bottle, for assembling the aluminum alloy bottle and the hydrogen-blocking inner liner together, and for driving the aluminum alloy bottle and the hydrogen-blocking inner liner to rotate synchronously. The tooling and drive mechanism 20 includes a drive motor 21 fixed on the left side wall of the arched frame 16. The output axis of the drive motor 21 passes through the left side wall to the right and is connected to a main shaft 22 at its extended end. A rotating seat 23 is fixed at the right end of the main shaft 22. A guide blind hole 24 is opened on the right end face of the rotating seat 23. The diameter of the guide blind hole 24 is equal to the outer diameter of the neck 2 of the aluminum alloy bottle. An annular retaining ring 25 is fixed on the inner wall of the guide blind hole 24. A clamping component is provided on the top and bottom walls of the rotating seat 23. An inner support component is provided between the top and bottom walls of the rotating seat 23.

[0107] The clamping assembly located above the rotating seat 23 includes a through groove 39 formed in the top wall of the rotating seat 23 and an L-plate fixed to the top wall of the rotating seat 23. The through groove 39 is located to the right of the annular retaining ring 25 and is connected to the guide blind hole 24. A clamping block 40 is slidably installed in the through groove 39. An arc-shaped groove is formed on the bottom surface of the clamping block 40. A threaded hole 41 is formed in the clamping block 40 that passes through the arc-shaped groove. A locking screw 42 is rotatably installed in the L-plate. The threaded section of the locking screw 42 is threadedly connected to the threaded hole 41 of the clamping block 40.

[0108] The internal support assembly includes a bidirectional lead screw 43 rotatably mounted between the top and bottom walls of the rotating seat 23 and a smooth rod 44 fixed between the top and bottom walls of the rotating seat 23. Both the bidirectional lead screw 43 and the smooth rod 44 are located on the left side of the annular retaining ring 25. The forward and reverse external threads of the bidirectional lead screw 43 are respectively connected to the right end face of two movable nuts 45, and clamping rods 46 are fixedly provided on each end face, which pass through the central hole of the annular retaining ring 25 to the right. Guide sleeves are fixedly provided on the left side walls of the two movable nuts 45, and the guide sleeves are sleeved on the smooth rod 44. A handwheel 47 is fixedly connected to the top end of the bidirectional lead screw 43.

[0109] The right side wall of the arched frame 16 is provided with a positioning and pushing mechanism 26 for positioning the aluminum alloy end cap 1 and for pushing the aluminum alloy end cap 1. The positioning and pushing mechanism 26 includes a pushing cylinder 27 fixed on the right side wall of the arched frame 16. The piston rod of the pushing cylinder 27 extends to the left through the right side wall, and a push plate 28 is fixed on the extended end. A positioning card seat 30 is rotatably installed on the left end face of the push plate 28 via a rotating shaft 29. A circular card groove 31 is opened on the left end face of the positioning card seat 30. The circular card groove 31 matches the outer contour of the aluminum alloy end cap 1, and the depth of the circular card groove 31 is less than the thickness of the aluminum alloy end cap 1.

[0110] The roller pressing mechanism 17 includes a frame 34 fixed to the bottom surface of the crossbeam of the arched frame 16. A roller pressing cylinder 35 is fixed inside the frame 34 and located on its bottom edge. The piston rod of the roller pressing cylinder 35 extends downward through the bottom edge of the frame 34, and a rigid connecting frame 36 is fixedly connected to its extended end. A first roller 37 and a second roller 38 are fixed to the left and right ends of the rigid connecting frame 36, respectively, with the second roller 38 located above the first roller 37. Multiple guide posts are fixed to the top surface of the rigid connecting frame 36, and each guide post slides upward through the bottom edge of the frame 34 to guide the rigid connecting frame 36.

[0111] The forming device also includes a controller, which is electrically connected to the laser welding machine, drive motor 21, push cylinder 27 and roller cylinder 35 via signal lines. The operator can control the extension or retraction of the piston rods of push cylinder 27 and roller cylinder 35 through the controller, and at the same time, can also control the start or stop of drive motor 21, thus facilitating the operator's operation.

[0112] A method for molding a hydrogen storage bottle with a hydrogen-barrier inner liner, comprising the following steps:

[0113] S1, the worker takes out a... Figures 7-8 The aluminum alloy bottle shown and as Figures 9-10 The hydrogen-blocking inner liner shown is inserted from bottom to top into the neck 2 of the aluminum alloy bottle body, with the small-diameter inner liner 5 inserted from bottom to top into the bottle body 3 of the aluminum alloy bottle body.

[0114] S2. Using the tooling and drive mechanism 20, the aluminum alloy bottle body and the hydrogen-blocking inner liner are assembled together. The specific operation steps are as follows:

[0115] S21. The worker places the aluminum alloy bottle body 3 within the area enclosed by the two rollers 33 of the support mechanism 18, such as... Figure 25As shown, at this time, the bottle body 3 is in contact with the two rollers 33. At the same time, the bottleneck 2 of the aluminum alloy bottle body is directly opposite to the guide blind hole 24 of the rotating seat 23 of the tooling and drive mechanism 20. The bottle body 3 of the aluminum alloy bottle body is directly opposite to the circular slot 31 of the positioning card seat 30 of the positioning and pushing mechanism 26.

[0116] S22. The worker pushes the bottle body 3 to the left, causing the neck 2 to enter the guide blind hole 24 of the rotating seat 23. When the worker can no longer push the bottle body 3 to the left, it means that the neck 2 is just blocked by the annular retaining ring 25 inside the rotating seat 23, thus achieving the positioning of the aluminum alloy bottle body and the hydrogen-blocking inner liner. Figure 26 As shown, at this time, the neck 2 of the aluminum alloy bottle is exactly between the clamping blocks 40 of the two clamping components. Simultaneously, the small-diameter inner liner 5 of the hydrogen-blocking inner liner is just fitted over the two clamping rods 46 of the inner support component. At the same time, the neck 2 is directly below the first roller 37 of the rolling mechanism 17, and the bottle body 3 is directly below the second roller 38 of the rolling mechanism 17. Figure 26 As shown;

[0117] S23. The worker screws in the locking screws 42 of the two clamping components. The locking screws 42 drive the clamping block 40 to move along the through groove 39 towards the neck 2. When the worker can no longer screw in the locking screws 42, the neck 2 of the aluminum alloy bottle is just clamped between the two clamping blocks 40. Figure 27 As shown;

[0118] S24. The worker rotates the handwheel 47 on the double-acting screw 43. The handwheel 47 drives the double-acting screw 43 to rotate, and the two movable nuts 45 on the double-acting screw 43 move towards the inner wall of the small-diameter inner liner 5 of the hydrogen-blocking inner liner. The movable nuts 45 drive the clamping rod 46 to move towards the inner wall of the small-diameter inner liner 5. When the worker can no longer rotate the handwheel 47, the two clamping rods 46 just fix the small-diameter inner liner 5 of the hydrogen-blocking inner liner in place. Figure 28 As shown, this ultimately achieves the goal of fixing the aluminum alloy bottle body and the hydrogen-blocking inner liner together using tooling and drive mechanism 20.

[0119] S3. Positioning and installation of aluminum alloy end cap 1: The worker takes out a... Figures 4-5 The aluminum alloy end cap 1 shown is inserted from left to right into the circular slot 31 of the positioning seat 30 of the positioning and pushing mechanism 26. Since the circular slot 31 matches the outer contour of the aluminum alloy end cap 1, and the depth of the circular slot 31 is less than the thickness of the aluminum alloy end cap 1, the positioning and installation of the aluminum alloy end cap 1 is achieved. Figure 29 As shown;

[0120] S4. The piston rod of the pushing cylinder 27 of the control positioning and pushing mechanism 26 extends to the left, driving the push plate 28 to move to the left. The push plate 28 drives the rotating shaft 29 and the positioning bracket 30 to move to the left simultaneously, thereby driving the aluminum alloy end cap 1 to move synchronously towards the bottle body 3. When the piston rod of the pushing cylinder 27 is fully extended, the aluminum alloy end cap 1 just abuts against the right end face of the bottle body 3. Figure 30 As shown, at this time, the contact point between the aluminum alloy end cap 1 and the bottle body 3 is exactly above the laser welding head 13;

[0121] S5. Weld the bottle body 3 to the aluminum alloy end cap 1 as a whole. The specific operation steps are as follows:

[0122] S51. The worker starts the laser welding machine by controlling the controller. The laser welding head 13 connected to it emits a laser beam. The laser beam irradiates the contact point between the bottle body 3 and the aluminum alloy end cap 1, thereby starting to weld the contact point between the bottle body 3 and the aluminum alloy end cap 1.

[0123] S52, the drive motor 21 of the control fixture and drive mechanism 20 starts, and the drive motor 21 drives the spindle 22 to rotate. The rotation direction of the spindle 22 is as follows: Figure 31 As shown by the middle arrow, the main shaft 22 drives the rotating seat 23 to rotate synchronously, the rotating seat 23 drives the clamping component and the inner support component to rotate synchronously, and in turn drives the bottleneck 2 and the small diameter inner liner 5 to rotate synchronously. Among them, the bottleneck 2 drives the bottle body 3 to rotate synchronously, the bottle body 3 drives the aluminum alloy end cap 1 against it to rotate synchronously, the aluminum alloy end cap 1 drives the positioning card seat 30 to rotate synchronously, and at the same time, the small diameter inner liner 5 drives the large diameter inner liner 6 to rotate synchronously.

[0124] As the bottle body 3 and the aluminum alloy end cap 1 rotate, the laser welding head 13 gradually welds the bottle body 3 and the aluminum alloy end cap 1 together.

[0125] After the bottle body 3 and the aluminum alloy end cap 1 rotate 360°, the controller shuts down the laser welding machine, thus ultimately achieving the welding of the bottle body 3 and the aluminum alloy end cap 1 into one piece. After welding, an annular weld scar 7 is formed between the bottle body 3 and the aluminum alloy end cap 1, as shown in the image. Figure 31 As shown, at the same time, the large-diameter inner liner 6 of the hydrogen-blocking inner liner is just restricted between the arc-shaped shoulder 4 of the aluminum alloy bottle body and the aluminum alloy end cap 1.

[0126] As can be seen from steps S4 to S5, the worker only needs to first control the piston rod of the pushing cylinder 27 of the positioning and pushing mechanism 26 to extend to the left so that the aluminum alloy end cap 1 abuts against the right end face of the bottle body 3; then control the drive motor 21 of the tooling and driving mechanism 20 to start, so as to drive the bottle body 3 and the aluminum alloy end cap 1 to rotate synchronously relative to the stationary laser welding head 13; then control the laser welding machine to start, so as to finally weld the bottle body 3 and the aluminum alloy end cap 1 into one piece, thereby forming an annular weld scar 7 between the bottle body 3 and the aluminum alloy end cap 1.

[0127] Therefore, this molding device can automatically and quickly weld the bottle body 3 and the aluminum alloy end cap 1 together by means of the sequential action of the positioning and pushing mechanism 26 and the tooling and driving mechanism 20. Compared with other methods, this method is much more efficient. Figures 3-16 The method shown eliminates the need for workers to manually weld the laser welding head 13 around the bottle body 3 to weld the bottle body 3 to the aluminum alloy end cap 1, thereby shortening the molding time of the hydrogen storage bottle B and greatly improving the molding efficiency of the hydrogen storage bottle.

[0128] S6. Roller pressing mechanism 17 is used to press both the bottle neck 2 and the bottle body 3:

[0129] The piston rod of the roller pressing cylinder 35 of the roller pressing mechanism 17 extends downward, and the piston rod drives the rigid connecting frame 36 to move downward. The rigid connecting frame 36 drives the first roller 37 and the second roller 38 to move downward synchronously. The first roller 37 moves toward the bottleneck 2 which is in a rotating state, while the second roller 38 moves toward the body 3 which is in a rotating state.

[0130] As the piston rod of the roller cylinder 35 continues to extend downward, the first roller 37 presses the rotating bottleneck 2 downward, causing the material of the bottleneck 2 to deform radially and also presses the rotating small-diameter inner liner 5. At the same time, the second roller 38 presses the rotating bottle body 3 downward, causing the material of the bottle body 3 to deform radially and also presses the rotating large-diameter inner liner 6.

[0131] When the piston rod of the roller cylinder 35 is fully extended, a small annular convex bulge 48 can be extruded and formed on both the inner wall of the bottleneck 2 and the inner wall of the small-diameter inner liner 5, such as... Figure 32 As shown, two small annular protrusions 48 are wrapped together, and simultaneously, a large annular protrusion 49 is extruded and formed on both the inner wall of the bottle body 3 and the inner wall of the large-diameter inner liner 6, as shown. Figure 32 As shown, two large annular protrusions 49 are wrapped together to form a hydrogen storage bottle B with a hydrogen barrier liner.

[0132] S7. The specific steps for removing hydrogen storage cylinder B are as follows:

[0133] S71, the piston rod of the roller pressing cylinder 35 of the worker-controlled roller pressing mechanism 17 retracts upward, the piston rod drives the rigid connecting frame 36 to move upward, and the rigid connecting frame 36 drives the first roller 37 and the second roller 38 to move upward synchronously, so that the first roller 37 and the second roller 38 are both reset. Figure 33 As shown;

[0134] S72, the drive motor 21 of the control tooling and drive mechanism 20 is turned off. At this time, the bottleneck 2, body 3, small diameter inner liner 5 and large diameter inner liner 6 of the hydrogen storage bottle B all stop rotating.

[0135] S73, the piston rod of the push cylinder 27 of the worker control positioning and pushing mechanism 26 retracts to the right, the piston rod drives the push plate 28 to move to the right, and the push plate 28 drives the positioning card seat 30 to move away from the aluminum alloy end cap 1 of the hydrogen storage bottle B.

[0136] S74. The worker loosens the locking screws 42 of the two clamping components. The locking screws 42 drive the clamping block 40 to move away from the bottleneck 2 of the hydrogen storage bottle B. At this time, the bottleneck 2 is no longer clamped between the clamping blocks 40 of the two clamping components.

[0137] S75, the worker rotates the handwheel 47 of the inner support assembly in the opposite direction. The handwheel 47 drives the bidirectional lead screw 43 to rotate in the opposite direction. The two movable nuts 45 on the bidirectional lead screw 43 move toward the inner wall of the small diameter inner liner 5 away from the hydrogen storage bottle B. The two clamping rods 46 no longer fix the small diameter inner liner 5 in place.

[0138] S76. The worker pulls the cylinder body 3 of hydrogen storage cylinder B to the right, as... Figure 34 As shown, the bottle body 3 drives the neck 2 out of the guide blind hole 24 of the rotating seat 23, and then the worker removes the hydrogen storage bottle B from the two rollers 33 of the support mechanism 18, as follows. Figure 35 The diagram shown is a schematic of the structure of the formed hydrogen storage bottle B;

[0139] S8. Workers can repeat steps S1 to S7 multiple times to form multiple hydrogen storage bottles B with hydrogen-barrier inner liner.

[0140] Furthermore, in step S52, the worker starts the drive motor 21 of the tooling and drive mechanism 20 to drive the bottleneck 2 and the small-diameter inner liner 5 to rotate synchronously, thereby driving the bottle body 3 and the large-diameter inner liner 6 to rotate synchronously. In step S6, the worker controls the piston rod of the roller pressing cylinder 35 of the roller pressing mechanism 17 to extend downward, so that the bottleneck 2 and the bottle body 3 are pressed by the first roller 37 and the second roller 38 respectively, thereby extruding and forming annular small protrusions 48 on the inner wall of the bottleneck 2 and the inner wall of the small-diameter inner liner 5. At the same time, annular large protrusions 49 are formed on the inner wall of the bottle body 3 and the inner wall of the large-diameter inner liner 6, thereby finally forming the hydrogen storage bottle B.

[0141] Because the small annular protrusion 48 of the small diameter inner liner 5 of the hydrogen storage cylinder B tightly covers the outside of the small annular protrusion 48 of the neck 2, that is, the small diameter inner liner 5 is firmly fixed to the inner wall of the neck 2. At the same time, the large annular protrusion 49 of the large diameter inner liner 6 of the hydrogen storage cylinder B tightly covers the outside of the large annular protrusion 49 of the bottle body 3, that is, the large diameter inner liner 6 is firmly fixed to the inner wall of the bottle body 3.

[0142] Therefore, when liquid hydrogen is filled into the large-diameter inner liner 6 using the filling equipment in the later stages, the large-diameter inner liner 6 will not shake and collide with the bottle body 3 under the impact of the liquid hydrogen. Simultaneously, the small-diameter inner liner 5 will not shake and collide with the neck 2, thus effectively protecting both the large-diameter inner liner 6 and the small-diameter inner liner 5. It can be seen that the hydrogen storage bottle B formed by this molding device is superior to... Figures 1-2 The hydrogen storage bottle A shown here greatly improves the molding quality of the hydrogen storage bottle.

Claims

1. A method for forming a hydrogen storage bottle with a hydrogen barrier liner, the method employing a forming device for a hydrogen storage bottle with a hydrogen barrier liner, the forming device comprising a machine base (15) fixed on a pad (14), an arched frame (16) fixed between the machine base (15) and the pad (14), and a rolling mechanism (17) set on the bottom surface of the crossbeam of the arched frame (16) for rolling the bottle body (3) and the neck (2) of the aluminum alloy bottle body, a support mechanism (18) for supporting the bottle body (3) is provided on the table surface of the machine base (15), the support mechanism (18) is located directly below the rolling mechanism (17), and a bracket (19) located to the right of the support mechanism (18) is fixed at the right end of the machine base (15), and a vertically upward laser welding head (13) is fixed inside the bracket (19). The arched frame (16) is provided with a tooling and drive mechanism (20) on the left side wall for positioning the aluminum alloy bottle, for assembling the aluminum alloy bottle and the hydrogen-blocking inner liner together, and for driving the aluminum alloy bottle and the hydrogen-blocking inner liner to rotate synchronously. The tooling and drive mechanism (20) includes a drive motor (21) fixed on the left side wall of the arched frame (16). The output shaft of the drive motor (21) passes through the left side wall to the right and is connected to a main shaft (22) at its extended end. A rotating seat (23) is fixed at the right end of the main shaft (22). The right end face of the rotating seat (23) is provided with a guide blind hole (24). The diameter of the guide blind hole (24) is equal to the outer diameter of the bottleneck (2) of the aluminum alloy bottle. An annular retaining ring (25) is fixed on the inner wall of the guide blind hole (24). A clamping component is provided on the top and bottom walls of the rotating seat (23). An inner support component is provided between the top and bottom walls of the rotating seat (23). The right side wall of the arched frame (16) is provided with a positioning and pushing mechanism (26) for positioning the aluminum alloy end cap (1) and for pushing the aluminum alloy end cap (1). The positioning and pushing mechanism (26) includes a pushing cylinder (27) fixed on the right side wall of the arched frame (16). The piston rod of the pushing cylinder (27) extends to the left through the right side wall, and a push plate (28) is fixed on the extended end. A positioning card seat (30) is rotatably installed on the left end face of the push plate (28) via a rotating shaft (29). A circular card groove (31) is opened on the left end face of the positioning card seat (30). The circular card groove (31) matches the outer contour of the aluminum alloy end cap (1), and the depth of the circular card groove (31) is less than the thickness of the aluminum alloy end cap (1). The feature is that: The method includes the following steps: S1. The worker takes out an aluminum alloy bottle and a hydrogen-blocking inner liner. The small-diameter inner liner (5) of the hydrogen-blocking inner liner is inserted into the neck (2) of the aluminum alloy bottle from bottom to top. At the same time, the large-diameter inner liner (6) of the hydrogen-blocking inner liner is inserted into the body (3) of the aluminum alloy bottle from bottom to top. S2. Using tooling and drive mechanism (20), the aluminum alloy bottle body and hydrogen barrier inner liner are assembled together. The specific operation steps are as follows: S21. The worker places the bottle body (3) of the aluminum alloy bottle in the area enclosed by the two rollers (33) of the support mechanism (18). At this time, the bottle body (3) is in contact with the two rollers (33). At the same time, the bottleneck (2) of the aluminum alloy bottle is directly opposite to the guide blind hole (24) of the rotating seat (23) of the tooling and drive mechanism (20). The bottle body (3) of the aluminum alloy bottle is directly opposite to the circular slot (31) of the positioning card seat (30) of the positioning and pushing mechanism (26). S22. The worker pushes the bottle body (3) to the left so that the bottleneck (2) enters the guide blind hole (24) of the rotating seat (23). When the worker can no longer push the bottle body (3) to the left, it means that the bottleneck (2) is blocked by the annular retaining ring (25) in the rotating seat (23), thus realizing the positioning of the aluminum alloy bottle body and the hydrogen-blocking inner liner. At this time, the bottleneck (2) of the aluminum alloy bottle body is just between the clamping blocks (40) of the two clamping components. At the same time, the small diameter inner liner (5) of the hydrogen-blocking inner liner is just outside the two clamping rods (46) of the inner support component. At the same time, the bottleneck (2) is just below the first roller (37) of the roller pressing mechanism (17), and the bottle body (3) is just below the second roller (38) of the roller pressing mechanism (17). S23, the worker screws in the locking screws (42) of the two clamping components. The locking screws (42) drive the clamping blocks (40) to move along the through groove (39) toward the bottleneck (2). When the worker can no longer screw in the locking screws (42), the bottleneck (2) of the aluminum alloy bottle is just clamped between the two clamping blocks (40). S24. The worker rotates the handwheel (47) on the double-acting screw (43). The handwheel (47) drives the double-acting screw (43) to rotate. The two movable nuts (45) on the double-acting screw (43) move towards the inner wall of the small-diameter inner liner (5) of the hydrogen-blocking inner liner. The movable nuts (45) drive the clamping rod (46) to move towards the inner wall of the small-diameter inner liner (5). When the worker can no longer rotate the handwheel (47), the two clamping rods (46) just fix the small-diameter inner liner (5) of the hydrogen-blocking inner liner, thus finally realizing the use of tooling and drive mechanism (20) to fix the aluminum alloy bottle body and the hydrogen-blocking inner liner together. S3. Positioning and installation of aluminum alloy end cap (1): The worker takes out an aluminum alloy end cap (1) and inserts it from left to right into the circular slot (31) of the positioning card seat (30) of the positioning and pushing mechanism (26). Since the circular slot (31) matches the outer contour of the aluminum alloy end cap (1) and the depth of the circular slot (31) is less than the thickness of the aluminum alloy end cap (1), the positioning and installation of the aluminum alloy end cap (1) is achieved. S4. The piston rod of the push cylinder (27) of the control positioning and push mechanism (26) extends to the left, and the piston rod drives the push plate (28) to move to the left. The push plate (28) drives the rotating shaft (29) and the positioning card seat (30) to move to the left in sync, thereby driving the aluminum alloy end cap (1) to move towards the bottle body (3) in sync. When the piston rod of the push cylinder (27) is fully extended, the aluminum alloy end cap (1) just abuts against the right end face of the bottle body (3). At this time, the contact point between the aluminum alloy end cap (1) and the bottle body (3) is just above the laser welding head (13). S5. Weld the bottle body (3) and the aluminum alloy end cap (1) together. The specific operation steps are as follows: S51. The worker starts the laser welding machine by controlling the controller. The laser welding head (13) connected to it emits a laser beam. The laser beam irradiates the contact point between the bottle body (3) and the aluminum alloy end cap (1), thereby starting to weld the contact point between the bottle body (3) and the aluminum alloy end cap (1). S52, the drive motor (21) of the control tooling and drive mechanism (20) starts, the drive motor (21) drives the main shaft (22) to rotate, the main shaft (22) drives the rotating seat (23) to rotate synchronously, the rotating seat (23) drives the clamping component and the inner support component to rotate synchronously, and then drives the bottleneck (2) and the small diameter inner liner (5) to rotate synchronously. Among them, the bottleneck (2) drives the bottle body (3) to rotate synchronously, the bottle body (3) drives the aluminum alloy end cap (1) against it to rotate synchronously, the aluminum alloy end cap (1) drives the positioning card seat (30) to rotate synchronously, and at the same time, the small diameter inner liner (5) drives the large diameter inner liner (6) to rotate synchronously. As the bottle body (3) and the aluminum alloy end cap (1) rotate, the laser welding head (13) gradually welds the bottle body (3) and the aluminum alloy end cap (1) together; After the bottle body (3) and aluminum alloy end cap (1) rotate 360°, the controller controls the laser welding machine to shut down, thus finally achieving the welding of the bottle body (3) and aluminum alloy end cap (1) into one piece. After welding, an annular weld scar (7) is formed between the bottle body (3) and aluminum alloy end cap (1). At the same time, the large-diameter inner liner (6) of the hydrogen barrier liner is just restricted between the arc-shaped shoulder (4) of the aluminum alloy bottle body and the aluminum alloy end cap (1). S6. Roll the bottle neck (2) and bottle body (3) using the roller pressing mechanism (17): The piston rod of the roller pressing cylinder (35) of the roller pressing mechanism (17) extends downward, and the piston rod drives the rigid connecting frame (36) to move downward. The rigid connecting frame (36) drives the first roller (37) and the second roller (38) to move downward synchronously. The first roller (37) moves towards the bottleneck (2) in the rotating state, while the second roller (38) moves towards the bottle body (3) in the rotating state. As the piston rod of the roller cylinder (35) continues to extend downward, the first roller (37) presses downward on the bottleneck (2) which is in a rotating state, causing the material of the bottleneck (2) to deform radially and also presses the small-diameter inner liner (5) which is in a rotating state. At the same time, the second roller (38) presses downward on the bottle body (3) which is in a rotating state, causing the material of the bottle body (3) to deform radially and also presses the large-diameter inner liner (6) which is in a rotating state. When the piston rod of the roller cylinder (35) is fully extended, a small annular convex bulge (48) can be extruded on the inner wall of the bottleneck (2) and the inner wall of the small diameter inner liner (5). The two small annular convex bulges (48) are covered together. At the same time, a large annular convex bulge (49) is extruded on the inner wall of the bottle body (3) and the inner wall of the large diameter inner liner (6). The two large annular convex bulges (49) are covered together, and finally a hydrogen storage bottle B with a hydrogen barrier inner liner is formed. S7. The specific steps for removing hydrogen storage cylinder B are as follows: S71, the piston rod of the roller cylinder (35) of the worker-controlled roller pressing mechanism (17) retracts upward, the piston rod drives the rigid connecting frame (36) to move upward, and the rigid connecting frame (36) drives the first roller (37) and the second roller (38) to move upward synchronously, so that the first roller (37) and the second roller (38) are both reset; S72, the drive motor (21) of the control tooling and drive mechanism (20) is closed. At this time, the bottleneck (2), body (3), small diameter inner liner (5) and large diameter inner liner (6) of the hydrogen storage bottle B all stop rotating. S73, the piston rod of the push cylinder (27) of the worker control positioning and pushing mechanism (26) retracts to the right, the piston rod drives the push plate (28) to move to the right, and the push plate (28) drives the positioning card seat (30) to move away from the aluminum alloy end cap (1) of the hydrogen storage bottle B. S74. The worker loosens the locking screws (42) of the two clamping components. The locking screws (42) drive the clamping block (40) to move away from the bottleneck (2) of the hydrogen storage bottle B. At this time, the bottleneck (2) is no longer clamped between the clamping blocks (40) of the two clamping components. S75, the worker rotates the handwheel (47) of the inner support assembly in the opposite direction. The handwheel (47) drives the double-acting screw (43) to rotate in the opposite direction. The two moving nuts (45) on the double-acting screw (43) move toward the inner wall of the small-diameter inner liner (5) away from the hydrogen storage bottle B. The two clamping rods (46) no longer fix the small-diameter inner liner (5) in place. S76. The worker pulls the body (3) of the hydrogen storage cylinder B to the right. The body (3) causes the neck (2) to exit from the guide blind hole (24) of the rotating seat (23). Then the worker removes the hydrogen storage cylinder B from the two rollers (33) of the support mechanism (18). S8. Workers can repeat steps S1 to S7 multiple times to form multiple hydrogen storage bottles B with hydrogen-barrier inner liner.

2. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 1, characterized in that: The support mechanism (18) includes a frame (32) fixed on the table surface of the machine base (15), and two rollers (33) distributed in front and behind are rotatably installed inside the frame (32).

3. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 2, characterized in that: The connector of the laser welding head (13) is connected to the laser welding machine via a wire.

4. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 3, characterized in that: The roller pressing mechanism (17) includes a frame (34) fixed on the bottom surface of the crossbeam of the arched frame (16). A roller pressing cylinder (35) is fixed inside the frame (34) and located on its bottom edge. The piston rod of the roller pressing cylinder (35) passes downward through the bottom edge of the frame (34), and a rigid connecting frame (36) is fixedly connected to the extended end. A first roller (37) and a second roller (38) are fixed at the left and right ends of the rigid connecting frame (36), respectively. The second roller (38) is located above the first roller (37).

5. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 4, characterized in that: Multiple guide posts are fixed on the top surface of the rigid connecting frame (36), and each guide post slides upward through the bottom edge of the frame (34) to guide the rigid connecting frame (36).

6. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 5, characterized in that: The clamping assembly located above the rotating seat (23) includes a through groove (39) opened in the top wall of the rotating seat (23) and an L plate fixed on the top wall of the rotating seat (23). The through groove (39) is located on the right side of the annular retaining ring (25) and is connected to the guide blind hole (24). A clamping block (40) is slidably installed in the through groove (39). An arc groove is opened on the bottom surface of the clamping block (40). A threaded hole (41) penetrating the arc groove is opened in the clamping block (40). A locking screw (42) is rotatably installed in the L plate. The threaded section of the locking screw (42) is threadedly connected to the threaded hole (41) of the clamping block (40).

7. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 6, characterized in that: The internal support assembly includes a bidirectional lead screw (43) rotatably mounted between the top and bottom walls of the rotating seat (23) and a smooth rod (44) fixed between the top and bottom walls of the rotating seat (23). Both the bidirectional lead screw (43) and the smooth rod (44) are located on the left side of the annular retaining ring (25). The right end faces of the two moving nuts (45) on the forward and reverse external threads of the bidirectional lead screw (43) are respectively fixed with clamping rods (46) that pass through the center hole of the annular retaining ring (25) to the right. The left side walls of the two moving nuts (45) are fixed with guide sleeves, which are sleeved on the smooth rod (44). A handwheel (47) is fixedly connected to the top end of the bidirectional lead screw (43).

8. The molding method of a hydrogen storage bottle with a hydrogen-barrier inner liner according to claim 7, characterized in that: The forming device also includes a controller, which is electrically connected to the laser welding machine, drive motor (21), push cylinder (27) and roller cylinder (35) via signal lines.

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