Gas cylinder spinning closing-in device and closing-in method

Abstract

The invention relates to the technical field of spinning forming, in particular to a gas cylinder spinning closing-in device and a closing-in method.The gas cylinder spinning closing-in device comprises a rack, a clamping component, a spinning component and an auxiliary component, and the clamping component, the spinning component and the auxiliary component are arranged on the rack; the end, used for stretching into the gas cylinder, of the mandrel is provided with a step face, the step face is used for being matched with the inner wall of a bottleneck of the gas cylinder in a supporting mode, the end, used for stretching into the gas cylinder, of the mandrel is connected with a jacking structure capable of expanding and contracting in the radial direction of the mandrel, and the jacking structure expands after the end, used for stretching into the gas cylinder, of the mandrel. And the jacking structure is arranged on the mandrel and forms a shaping ring groove with the step surface in a surrounding mode, the shaping ring groove is used for being in positioning fit with a bottle opening, a bottle neck and a bottle shoulder of the gas bottle, and the jacking structure is shrunk after closing-up of the gas bottle is completed so that the jacking structure can retreat from the gas bottle along with the mandrel. The technical problem that in the prior art, the bottle shoulder position cannot be supported, and consequently the gas cylinder closing-up quality is affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of spin forming, and in particular to a gas cylinder spin forming and closing device and a closing method. Background Art

[0002] At present, the sealing of gas cylinders is completed through the spin forming process. The specific steps are: heating one end of the metal tube to a deformable state, and then using a spinning component to spin-form the heated end of the metal tube, so that one end of the metal tube forms a bottleneck structure with a diameter smaller than that of the bottle body.

[0003] In the prior art, when closing the mouth of a gas cylinder, in order to ensure that the bottleneck position structure is stable during closing and the final bottleneck and the mouth of the bottle have regular shapes, it is usually necessary to provide auxiliary support from the mouth of the gas cylinder. For example, a high-precision closing device and a closing method are disclosed in a Chinese invention patent application with application publication number CN116511361A. The closing device includes a clamping component for clamping the gas cylinder, a spinning component for spinning the end of the gas cylinder from both radial sides of the gas cylinder, and an auxiliary component for extending from the mouth of the gas cylinder into the gas cylinder to provide auxiliary support to the inner wall of the mouth of the gas cylinder. Another example is a method for closing an aluminum alloy gas cylinder with an increased nozzle wall thickness disclosed in a Chinese invention patent with authorization announcement number CN105170829B. A mandrel with a step at one end is provided, and the mandrel is located inside a tailstock trolley. When the gas cylinder is closed, the tailstock trolley drives the mandrel into the gas cylinder, and then the selection wheel moves according to a set spinning trajectory. The mandrel is supported and shaped from the inside of the gas cylinder, and the closing of the gas cylinder is completed under the support and shaping effect of the step surface at the end of the mandrel.

[0004] Although the above-mentioned closing device and closing method support and maintain the position of the bottleneck and the bottle mouth during closing, and can keep the shape of the bottleneck and the bottle mouth regular, when spinning the bottle mouth, since the bottle shoulder position (the transition position between the bottle body and the bottleneck) is not supported and shaped, it is easy to cause the shape of this position to be irregular and the thickness to be uneven, thereby affecting the closing quality of the entire gas cylinder. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention proposes a gas cylinder spinning and closing device and a closing method to solve the technical problem in the prior art that the bottle shoulder position cannot be supported and the closing quality of the gas cylinder is affected.

[0006] A gas cylinder spinning and closing device and a closing method of the present invention adopt the following technical solutions: The cam is adapted to engage with the cylinder body of the gas cylinder and the cylinder neck and is adapted to engage with the cylinder neck of the gas cylinder to engage with the cylinder neck of the gas cylinder.

[0007] Furthermore, the top support structure is an umbrella-shaped support structure, including a center tube coaxially inserted at one end of the core shaft, a telescopic driving mechanism and a sliding block capable of axially reciprocating along the center tube are provided in the center tube, the telescopic driving mechanism is connected to the sliding block, and is used to drive the sliding block to reciprocate, the outer wall of the center tube is hinged with a plurality of support rods, and the plurality of support rods are arranged at intervals along the circumference of the center tube, a connecting rod is connected between the support rod and the sliding block, one end of the connecting rod is hinged to the support rod, and the other end is hinged to the sliding block, when the telescopic driving mechanism drives the sliding block to move in a direction close to the core shaft, the sliding block drives one end of the support rod to swing in a direction away from the center tube through the connecting rod, so that the top support structure expands into an umbrella shape, and when the sliding block moves in a direction away from the core shaft, the sliding block drives one end of the support rod to swing in a direction close to the center tube through the connecting rod, so that the top support structure contracts.

[0008] Furthermore, the support rod is an arc-shaped rod, the concave surface of the arc-shaped rod faces the central tube, and the convex surface of the arc-shaped rod is used for positioning and fitting with the inner wall of the bottle shoulder of the gas cylinder.

[0009] Furthermore, a mounting hole is provided in the core shaft, the center tube is inserted in the mounting hole, a radial through hole penetrating the inside and outside of the mounting hole is opened on the inner wall of the mounting hole, a connecting hole is correspondingly opened on the inner wall of the center tube, and fasteners are screwed into the radial through hole and the connecting hole to fix the center tube in the mounting hole of the core shaft.

[0010] Furthermore, a slide groove extending along the axial direction of the center tube is provided on the side wall of the center tube, and a plurality of the slide grooves are provided at intervals along the circumference of the center tube. A plurality of first hinge blocks are provided at intervals on the outer periphery of the sliding block, and the first hinge blocks are provided in a one-to-one correspondence with the support rods, and each first hinge block extends into each slide groove in a one-to-one correspondence. One end of the connecting rod is hinged to the sliding block through the first hinge block, and a second hinge block is fixed on the concave surface of the support rod, and the other end of the connecting rod is hinged to the support rod through the second hinge block.

[0011] Furthermore, a hinged ear seat is fixed on the outer wall of the central tube, and one end of the support rod is hingedly connected to the outer wall of the central tube through the hinged ear seat.

[0012] Furthermore, the telescopic driving mechanism is a telescopic cylinder having a cylinder body and a telescopic rod. The cylinder body is fixed in a central tube, and one end of the telescopic rod is connected to the sliding block.

[0013] Furthermore, the auxiliary component also includes a tailstock, a slide rail is provided on the frame, the extension direction of the slide rail is parallel to the axis of the mandrel, the tailstock guide is installed on the slide rail, and the mandrel is movably arranged on the tailstock along its own axial direction.

[0014] Furthermore, the tail stock includes a base and a fixed cylinder fixed on the base, the core shaft is coaxially inserted in the fixed cylinder, an internal threaded hole is provided in the core shaft, a threaded rod is coaxially passed through the fixed cylinder, one end of the threaded rod is screwed into the internal threaded hole, and the other end of the threaded rod is connected to a hand wheel, and the threaded rod is driven to rotate by rotating the hand wheel, and the rotation of the threaded rod drives the core shaft to move along its own axis in the fixed cylinder.

[0015] A method for closing a gas cylinder using the above-mentioned gas cylinder spinning closing device includes the following steps: first, the body of the gas cylinder is clamped on a clamping component so that one end of the gas cylinder is in an overhanging state; then, the overhanging end of the gas cylinder is heated, and the tailstock is driven to move toward the gas cylinder with the mandrel, so that one end of the mandrel and a top support structure are extended into the gas cylinder; after the top support structure is expanded, a shaping ring groove is formed with the step surface of the end of the mandrel; then, the spinning component begins to spin the outer wall of the gas cylinder according to a set trajectory; the shaping ring groove supports and positions the inner wall of the gas cylinder, so that the spun part of the gas cylinder forms a bottleneck and a bottle shoulder in the shaping ring groove.

[0016] The beneficial effects of the present invention are as follows: a gas cylinder spinning and closing device and a closing method of the present invention, by setting an expandable and contractible top support structure at the end of the mandrel of the auxiliary component, so that the top support structure forms a shaping groove with the step surface of the end of the mandrel after expansion, so that the bottleneck and the shoulder of the gas cylinder are both spun into shape in the shaping groove, and the shaping groove supports and positions the inner wall of the bottleneck and the shoulder from the inside of the gas cylinder, thereby reducing the irregular deformation inside the gas cylinder and better controlling the size of the bottleneck and shoulder of the gas cylinder. In addition, the shaping groove surrounded by the top support structure and the step surface of the mandrel limits the bottleneck and shoulder of the gas cylinder within the shaping groove, reducing the stretching amount in the axial direction of the gas cylinder during spinning, and making the thickness of the gas cylinder more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a three-dimensional schematic diagram of an embodiment of a gas cylinder spinning and closing device of the present invention; Figure 2 It is a front view of an embodiment of a gas cylinder spinning and closing device of the present invention; Figure 3 It is a front view of an auxiliary component in an embodiment of a gas cylinder spinning and closing device of the present invention; Figure 4 for Figure 3 Right view of; Figure 5 for Figure 4 Middle AA section view; Figure 6 for Figure 5 A magnified schematic diagram of the part B in the middle; Figure 7 for Figure 5 Another state diagram of ; Figure 8 for Figure 7 A magnified schematic diagram of the local D in the middle; Fig. 9 A three-dimensional schematic diagram of a top support structure in an embodiment of a gas cylinder spinning and closing device of the present invention (in an open state); Fig.10 It is a front view of a top support structure in one embodiment of a gas cylinder spinning and closing device of the present invention; Fig.11 for Fig.10 Middle CC section view; In the figure: 100, frame; 101, slide rail; 110, spinning component; 111, moving seat; 112, spinning wheel; 120, clamping component; 121, gas cylinder; 200, auxiliary component; 201, hand wheel; 202, locking mechanism; 203, spindle; 204, tail stock; 205, threaded rod; 210, top support structure; 211, center tube; 2111, slide groove; 2112, hinged ear seat; 212, telescopic cylinder; 213, fixing screw; 214, pin; 215, support rod; 2151, second hinge block; 216, connecting rod; 217, sliding block; 2171, first hinge block; 218, mounting hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] An embodiment of a gas cylinder spinning and closing device and a closing method of the present invention is as follows: Figures 1 to 11 As shown, the gas cylinder spinning and closing device includes a frame 100 and a clamping component 120, a spinning component 110 and an auxiliary component 200 arranged on the frame 100, wherein the clamping component 120 is used to clamp the body of the gas cylinder 121, and the clamping component 120 is connected to a rotation drive mechanism for driving the clamping component 120 and the gas cylinder 121 to rotate. The spinning component 110 is used to spin one end of the gas cylinder 121 from the outside of the gas cylinder 121, so that one end of the gas cylinder 121 forms a closing structure. The auxiliary component 200 is used to support and cooperate with the inner wall of the gas cylinder 121 when the spinning component 110 spins the gas cylinder 121. In this embodiment, a slide rail 101 is provided on the frame 100, and the spinning component 110 and the auxiliary component 200 are respectively guided and installed on the slide rail 101, and the spinning component 110 and the auxiliary component 200 can be respectively guided and moved along the slide rail 101 to approach and move away from the clamping component 120. The spinning component 110 includes two movable seats 111 that can move relative to and away from each other, and a spinning wheel 112 is rotatably provided on each movable seat 111. The two spinning wheels 112 spin the gas cylinder 121 from both radial sides of the gas cylinder 121. In the present invention, the structures of the frame 100, the clamping component 120 and the spinning component 110 all belong to the existing known technology and will not be described in detail here.

[0021] In the present invention, the auxiliary component 200 includes a tailstock 204 and a mandrel 203 disposed on the tailstock 204. The tailstock 204 is guided and installed on the slide rail 101. The tailstock 204 moves along the guide of the slide rail 101 to drive the mandrel 203 to move, so that one end of the mandrel 203 can be inserted into the gas cylinder 121 or withdraw from the gas cylinder 121. The end of the mandrel 203 for inserting into the gas cylinder 121 is provided with a step surface, and the step surface is used to support and cooperate with the inner wall of the bottleneck of the gas cylinder 121. One end of the core shaft 203 that is used to extend into the gas cylinder 121 is connected to a top support structure 210 that can expand and contract along the radial direction of the core shaft 203. The top support structure 210 expands after one end of the core shaft 203 is extended into the gas cylinder 121, and forms a shaping ring groove with the step surface. The shaping ring groove is used to position and cooperate with the bottle mouth, bottleneck and bottle shoulder of the gas cylinder 121. The top support structure 210 contracts after the gas cylinder 121 is closed, so that the top support structure 210 can exit the gas cylinder 121 together with the core shaft 203.

[0022] In this embodiment, the top support structure 210 is an umbrella-shaped support structure, including a center tube 211 coaxially inserted at one end of the core shaft 203. Specifically, a mounting hole 218 is provided in the core shaft 203, and the center tube 211 is inserted in the mounting hole 218. A radial through hole that passes through the inside and outside of the mounting hole 218 is provided on the inner wall of the mounting hole 218. A connecting hole is correspondingly provided on the inner wall of the center tube 211. Fasteners are screwed into the radial through holes and the connecting holes to fix the center tube 211 in the mounting hole 218 of the core shaft 203. The fasteners include a fixing screw 213 and a pin 214. A telescopic driving mechanism and a sliding block 217 that can reciprocate along the axial direction of the center tube 211 are provided in the center tube 211. The telescopic driving mechanism is connected to the sliding block 217 to drive the sliding block 217 to reciprocate. The outer wall of the central tube 211 is hinged with a plurality of support rods 215, which are arranged at intervals along the circumference of the central tube 211. A connecting rod 216 is connected between the support rod 215 and the sliding block 217, one end of the connecting rod 216 is hinged to the support rod 215, and the other end is hinged to the sliding block 217.

[0023] In this embodiment, the support rod 215 is an arc-shaped rod, the concave surface of the arc-shaped rod faces the central tube 211, and the convex surface of the arc-shaped rod is used to position and fit with the inner wall of the bottle shoulder of the gas cylinder 121. A slide groove 2111 extending along the axial direction of the central tube 211 is provided on the side wall of the central tube 211, and a plurality of the slide grooves 2111 are provided at intervals along the circumference of the central tube 211. A plurality of first hinge blocks 2171 are provided at intervals on the outer periphery of the sliding block 217, and the first hinge blocks 2171 are provided one-to-one with the support rod 215, and each first hinge block 2171 extends into each slide groove 2111 one-to-one, and one end of the connecting rod 216 is hinged to the sliding block 217 through the first hinge block 2171, and a second hinge block 2151 is fixed on the concave surface of the support rod 215, and the other end of the connecting rod 216 is hinged to the support rod 215 through the second hinge block 2151. A hinged ear seat 2112 is fixed on the outer wall of the central tube 211, and one end of the support rod 215 is hingedly connected to the outer wall of the central tube 211 through the hinged ear seat 2112. The telescopic drive mechanism is a telescopic cylinder 212, and the telescopic cylinder 212 has a cylinder body and a telescopic rod, the cylinder body is fixed in the central tube 211, and one end of the telescopic rod is connected to the sliding block 217.

[0024] When the telescopic driving mechanism drives the sliding block 217 to move toward the direction close to the core shaft 203, the sliding block 217 drives one end of the support rod 215 to swing away from the center tube 211 through the connecting rod 216, so that the top support structure 210 expands into an umbrella shape. Figure 8 In the state shown, each support rod 215 and the step surface at the end of the core shaft 203 are combined to form a shaping ring groove that surrounds the core shaft 203. After the spinning component 110 spins the outer wall of the gas cylinder 121 according to the set trajectory, a bottleneck and a bottle shoulder can be formed in the shaping ring groove, wherein the step surface on the core shaft 203 supports and positions the bottleneck, and each support rod 215 supports and positions the bottle shoulder. In other words, the shaping ring groove supports and positions the formed bottleneck and bottle shoulder, which can ensure that the wall thickness of the bottleneck and bottle shoulder is as uniform as possible and the shape is regular. When the sliding block 217 moves in the direction away from the core shaft 203, the sliding block 217 drives one end of the support rod 215 to swing toward the direction close to the center tube 211 through the connecting rod 216, so that the top support structure 210 shrinks. At this time, as shown in FIG. Figure 6 In the state shown, the outer diameter of the supporting structure 210 is smaller than the inner diameter of the bottleneck, so that after the gas cylinder 121 is closed, the core shaft 203 can withdraw from the gas cylinder 121 with the supporting structure 210.

[0025] In this embodiment, the core shaft 203 is movably arranged on the tail stock 204 along its own axial direction. The tail stock 204 includes a base and a fixed cylinder fixed on the base. The core shaft 203 is coaxially inserted in the fixed cylinder. An internal threaded hole is provided in the core shaft 203. A threaded rod 205 is coaxially passed through the fixed cylinder. One end of the threaded rod 205 is screwed into the internal threaded hole, and the other end of the threaded rod 205 is connected to a hand wheel 201. The threaded rod 205 is driven to rotate by rotating the hand wheel 201, and the threaded rod 205 rotates to drive the core shaft 203 to move along its own axis in the fixed cylinder. In this embodiment, a locking mechanism 202 is provided on the side wall of the fixed cylinder, and the locking mechanism 202 includes a locking rod swingably arranged on the side wall of the fixed cylinder. When the locking rod is pulled downward, the end of the locking rod extending into the fixed cylinder is locked with the outer wall of the core shaft 203 to lock the core shaft 203 at a set position. When the locking rod is pulled upward, the locking rod releases the lock on the core shaft 203. After the tail stock 204 drives the core shaft 203 to move to the set position toward the clamping component 120, the core shaft 203 is driven to move relative to the fixed cylinder by rotating the hand wheel 201, so that the core shaft 203 is extended and extends into the gas cylinder 121.

[0026] A gas cylinder spinning and closing method of the present invention adopts the above-mentioned gas cylinder spinning and closing device, and the closing method includes the following steps: first, the body of the gas cylinder 121 is clamped on the clamping component 120, so that one end of the gas cylinder 121 is in a cantilevered state, and then the cantilevered end of the gas cylinder 121 is heated, and the tailstock 204 is driven to move with the core shaft 203 toward the gas cylinder 121 to a set position, and at the same time, the spinning component 110 moves toward the gas cylinder 121 along the slide rail 101. After the tailstock 204 moves to the set position, the hand-cranked wheel 201 is rotated to drive the core shaft 203 to move toward the inside of the gas cylinder 121, so that one end of the core shaft 203 and the top support structure 210 extend into the gas cylinder 121. In the initial state, the top support structure 210 is in a contracted state, such as Figure 6 As shown, the telescopic cylinder 212 is then controlled to contract, so that the telescopic rod of the telescopic cylinder 212 drives the sliding block 217 to move toward the direction close to the core shaft 203. The sliding block 217 supports each support rod 215 through each connecting rod 216, so that each support rod 215 is opened to form an umbrella shape. After the support structure 210 is expanded, it forms a shaping ring groove with the step surface at the end of the core shaft 203. Then the spinning component 110 starts to spin the outer wall of the gas cylinder 121 according to the set trajectory. The shaping ring groove supports and positions the inner wall of the gas cylinder 121, so that the spun part of the gas cylinder 121 forms a bottleneck and a bottle shoulder in the shaping ring groove, as shown in FIG. Figure 8After the gas cylinder 121 is closed, the telescopic rod of the telescopic cylinder 212 is controlled to extend, and the telescopic rod drives the sliding block 217 to move away from the core shaft 203. The sliding block 217 drives each supporting rod 215 to retract through each connecting rod 216, so that the entire supporting structure 210 is in a contracted state, and then the hand wheel 201 is rotated to drive the core shaft 203 to withdraw the supporting structure 210 from the gas cylinder 121.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas cylinder spinning and closing device, comprising a frame (100) and a clamping component (120), a spinning component (110) and an auxiliary component (200) arranged on the frame (100), wherein the clamping component (120) is used to clamp the body of a gas cylinder (121), the spinning component (110) is used to spin one end of the gas cylinder (121) from the outside of the gas cylinder (121) to form a closed end of the gas cylinder (121), and the auxiliary component (200) is used to support and cooperate with the inner wall of the gas cylinder (121) when the spinning component (110) spins the gas cylinder (121), characterized in that: The auxiliary component (200) comprises a core shaft (203) having one end for inserting into the gas cylinder (121); the end of the core shaft (203) for inserting into the gas cylinder (121) is provided with a step surface, and the step surface is used to support and cooperate with the inner wall of the bottleneck of the gas cylinder (121); the end of the core shaft (203) for inserting into the gas cylinder (121) is connected to a top support structure (210) capable of expanding and contracting along the radial direction of the core shaft (203); the top support structure (210) expands after the end of the core shaft (203) is inserted into the gas cylinder (121), and forms a shaping ring groove with the step surface; the shaping ring groove is used to position and cooperate with the bottle mouth, bottleneck and bottle shoulder of the gas cylinder (121); the top support structure (210) contracts after the gas cylinder (121) is closed, so that the top support structure (210) exits the gas cylinder (121) together with the core shaft (203).

2. The gas cylinder spinning and closing device according to claim 1, characterized in that: The top support structure (210) is an umbrella-shaped support structure, comprising a center tube (211) coaxially inserted at one end of a core shaft (203), wherein a telescopic drive mechanism and a sliding block (217) capable of axially reciprocating along the center tube (211) are provided in the center tube (211), wherein the telescopic drive mechanism is connected to the sliding block (217) and is used to drive the sliding block (217) to reciprocate, wherein a plurality of support rods (215) are hingedly connected to the outer wall of the center tube (211), wherein the plurality of support rods (215) are arranged at intervals along the circumference of the center tube (211), wherein a connecting rod (216) is connected between the support rod (215) and the sliding block (217), wherein the connecting rod (216) is One end is hinged to the support rod (215), and the other end is hinged to the sliding block (217); when the telescopic drive mechanism drives the sliding block (217) to move in a direction close to the core shaft (203), the sliding block (217) drives one end of the support rod (215) to swing in a direction away from the central tube (211) through the connecting rod (216), so that the supporting structure (210) expands into an umbrella shape; when the sliding block (217) moves in a direction away from the core shaft (203), the sliding block (217) drives one end of the support rod (215) to swing in a direction close to the central tube (211) through the connecting rod (216), so that the supporting structure (210) contracts.

3. The gas cylinder spinning and closing device according to claim 2, characterized in that: The support rod (215) is an arc-shaped rod, the concave surface of the arc-shaped rod faces the central tube (211), and the convex surface of the arc-shaped rod is used to position and fit with the inner wall of the bottle shoulder of the gas cylinder (121).

4. The gas cylinder spinning and closing device according to claim 3, characterized in that: The core shaft (203) is provided with a mounting hole (218), the center tube (211) is inserted into the mounting hole (218), the inner wall of the mounting hole (218) is provided with a radial through hole that passes through the inside and outside of the mounting hole (218), and the inner wall of the center tube (211) is provided with a corresponding connecting hole, and fasteners are screwed into the radial through hole and the connecting hole to fix the center tube (211) in the mounting hole (218) of the core shaft (203).

5. The gas cylinder spinning and closing device according to claim 4, characterized in that: A slide groove (2111) extending along the axial direction of the center tube (211) is provided on the side wall of the center tube (211), and a plurality of the slide grooves (2111) are provided at intervals along the circumference of the center tube (211). A plurality of first hinge blocks (2171) are provided at intervals on the outer circumference of the sliding block (217), and the first hinge blocks (2171) are provided in a one-to-one correspondence with the support rod (215). Each first hinge block (2171) extends into each slide groove (2111) in a one-to-one correspondence. One end of the connecting rod (216) is hinged to the sliding block (217) through the first hinge block (2171), and a second hinge block (2151) is fixed on the concave surface of the support rod (215), and the other end of the connecting rod (216) is hinged to the support rod (215) through the second hinge block (2151).

6. The gas cylinder spinning and closing device according to claim 5, characterized in that: A hinged ear seat (2112) is fixed on the outer wall of the central tube (211), and one end of the support rod (215) is hingedly connected to the outer wall of the central tube (211) via the hinged ear seat (2112).

7. The gas cylinder spinning and closing device according to claim 6, characterized in that: The telescopic drive mechanism is a telescopic cylinder (212), the telescopic cylinder (212) comprising a cylinder body and a telescopic rod, the cylinder body being fixed in the central cylinder (211), and one end of the telescopic rod being connected to the sliding block (217).

8. The gas cylinder spinning and closing device according to claim 7, characterized in that: The auxiliary component (200) further comprises a tailstock (204); a slide rail (101) is provided on the frame (100); the extension direction of the slide rail (101) is parallel to the axis of the mandrel (203); the tailstock (204) is guided and mounted on the slide rail (101); and the mandrel (203) is movably arranged on the tailstock (204) along its own axial direction.

9. The gas cylinder spinning and closing device according to claim 8, characterized in that: The tailstock (204) comprises a base and a fixed cylinder fixed on the base, the mandrel (203) is coaxially inserted in the fixed cylinder, an internal threaded hole is provided in the mandrel (203), a threaded rod (205) is coaxially passed through the fixed cylinder, one end of the threaded rod (205) is screwed into the internal threaded hole, and the other end of the threaded rod (205) is connected to a hand-cranked wheel (201), the threaded rod (205) is driven to rotate by rotating the hand-cranked wheel (201), and the threaded rod (205) rotates to drive the mandrel (203) to move along its own axis in the fixed cylinder.

10. A method for closing a gas cylinder using the gas cylinder closing device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: firstly, clamping the body of a gas cylinder (121) on a clamping component (120) so that one end of the gas cylinder (121) is in a cantilevered state; then, heating the cantilevered end of the gas cylinder (121); driving the tailstock (204) to move with the mandrel (203) toward the gas cylinder (121); making one end of the mandrel (203) and a top support structure (210) extend into the gas cylinder (121); and forming a shaping ring groove with the step surface of the end of the mandrel (203) after the top support structure (210) expands; and then, the spinning component (110) starts to spin the outer wall of the gas cylinder (121) according to a set trajectory; the shaping ring groove supports and positions the inner wall of the gas cylinder (121); and making the spun part of the gas cylinder (121) form a bottleneck and a bottle shoulder in the shaping ring groove.

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