CN110640042A - A kind of gas storage bottle processing method - Google Patents

Abstract

The invention discloses a processing method of a gas storage bottle, which belongs to the technical field of high-pressure gas storage bottles and comprises the following steps: stamping and deep-drawing the aluminum material for multiple times to form a cup-shaped body with one closed end and one opened end; the cup-shaped body is closed by strong rotation to form an inner container with a bottle mouth end sealing head, an inner container barrel and a tail plug end sealing head; in the process of strong rotation, the average thickness of the liner cylinder is less than or equal to 1.5 mm. The gas storage bottle produced by the method ensures that the inner container is as light as possible, and improves the gas storage density per unit weight.

Description

A kind of gas storage bottle processing method

technical field

The invention relates to the technical field of high-pressure gas storage cylinders, in particular to a processing method for gas storage cylinders.

Background technique

The gas cylinder is a storage device for the fuel gas in the fuel cell. The gas holding capacity of the gas cylinder directly determines the endurance of the fuel cell. The gas holding capacity of the gas cylinder is directly related to the processing method of the gas cylinder.

The existing gas storage cylinder processing method directly adopts aluminum plate to punch and form, and there is no precise restriction on the thickness and volume of the gas cylinder, so that the gas holding capacity of the gas storage cylinder cannot be increased all the time.

In order to make the gas storage density per unit weight of the gas storage cylinder, so that the gas storage cylinder can store more fuel gas, a new processing method needs to be adopted.

SUMMARY OF THE INVENTION

The present invention intends to provide a processing method for a gas storage cylinder capable of processing a gas storage cylinder with a higher gas storage density per unit weight.

A method for processing a gas storage cylinder, comprising the following steps:

The aluminum material is punched and drawn for many times to form a cup-shaped body with one end closed and one end open;

After the cup-shaped body is closed by strong rotation, an inner bladder with a bottle end cap, an inner bladder cylinder and a tail plug end cap is formed;

In the process of strong rotation, the average thickness of the inner tube is less than or equal to 1.5 mm.

The advantages of this scheme are:

When making the inner bladder, in the process of strong rotation, by monitoring the thickness of the inner bladder cylinder, the average thickness of the inner bladder cylinder is less than or equal to 1.5 mm, and the inner bladder is made as thin as possible, so as to ensure that the inner bladder is fully Lightweight possible, increasing gas storage density per unit weight. When the same mass of gas is loaded, the weight of the entire gas storage cylinder is lighter, which is more conducive to the loading of equipment such as drones and automobiles.

Further, in the deep drawing process, after three times of deep drawing, the closed end of the cup-shaped body is deep drawn to form the end plug end cap, and the part between the closed end and the open end is deep drawn to form the inner bladder cylinder.

After three times of deep drawing, the cup-shaped body formed by deep drawing of the aluminum material has sufficient length, so that the original closed end is deep drawn to form the end plug end head, and the part between the closed end and the open end is deep drawn to form the inner tube. The inner tank itself also has a certain length, which is enough to continue the processing operation later.

Further, in the process of deep drawing and strong spinning and closing, the wall thickness of the inner tube is gradually reduced from both ends to the middle.

The purpose of thinning the entire inner liner is achieved by thinning the inner liner cylinder, so that the inner liner is lighter in weight on the premise of meeting the gas accommodation requirements, and the storage density of the fuel gas per unit weight is increased.

Further, in the process of strong rotation and closing, the open end of the cup-shaped body is gradually closed to form a bottle end sealing head with a bottle mouth end; the bottle mouth end sealing head forms a bottle mouth end connected between the bottle mouth end and the inner tube body. Surface, the depth of the surface of the bottle mouth end is the depth of the front head.

In the process of strong rotation and closing, by forming the curved surface of the bottle mouth, the open end of the original cup-shaped body can be closed to form the bottle mouth end, and the depth of the curved surface of the bottle mouth end is the distance between the two ends of the bottle mouth end curved surface, It is also the distance between the end of the bottle mouth and the end of the inner barrel close to each other, which can be used to indicate the degree of curvature of the curved surface of the bottle mouth end.

Further, a tail plug end curved surface is integrally formed between the tail plug end cover and the inner bladder; the depth of the tail plug end curved surface is the depth of the rear head; the depth of the rear head is equal to the depth of the front head .

The depth of the curved surface of the tail plug end is the distance between the head of the tail plug end and the ends of the inner bladder cylinder that are close to each other. Like the depth of the surface of the bottle mouth, the depth of the surface of the tail plug also indicates the completeness of the surface of the tail plug. The two are equal, indicating that the two have the same degree of curvature.

A tail plug end is installed at the head end formed during the deep drawing process.

By installing the end of the tail plug, it is convenient to connect and install with equipment such as a strong spinner, and it is convenient to further process the cup-shaped body and the inner bladder and gas storage cylinder formed behind it after being fixed.

Further, in the process of deep drawing and strong spinning, the average diameter of the inner tube body is made larger than the depth of the front end head and the depth of the rear end head, respectively.

Design the size of the inner tank first, and then process it according to the design. The shape and structure of the processed inner tank is limited by the relationship between the diameter of the inner tank and the depth of the front head and the depth of the rear head. Further, after the closing process, the ratios of the depth of the front head and the depth of the rear head to the average diameter of the inner bladder cylinder are both less than or equal to 0.3.

In the process of closing the mouth, the entire inner liner is a flat structure with a larger average diameter, so that the effective volume of the inner liner can be increased, the capacity of fuel gas can be increased, and the total length of the inner liner can be kept unchanged. Storage density of fuel gas in large unit weight.

Further, in the process of strong rotation, part of the wall thickness of the inner tube is reduced to 1.2 mm.

The thickness of some parts of the inner tank can reach a minimum thickness of 1.2 mm. Compared with most of the current gas storage cylinders that can only achieve a minimum thickness of 1.5 mm, the gas storage cylinder in this scheme further thins the inner tank, which can reduce the thickness of the inner tank. Under the premise of accommodating the same amount of fuel gas, the overall weight of the gas storage cylinder is made lighter, and the storage capacity of the fuel gas per unit weight is increased.

Further, the closing process is performed at a temperature of 420-450°C.

At this temperature, it is beneficial to improve the ductility of the aluminum after heating, and it is more convenient to close the mouth.

Further, the strong spinning and closing processes are carried out at 550-650 rpm.

At this rotational speed, it is favorable for the thinning of the inner tank and the closing of the bottle mouth end.

Description of drawings

FIG. 1 is a schematic structural diagram of a gas cylinder formed by processing according to Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of a valve in a gas storage cylinder formed by processing according to the second embodiment of the present invention.

FIG. 3 is a bottom view of FIG. 2 .

Detailed ways

The following is further described in detail by specific embodiments:

Reference numerals in the accompanying drawings include: lightweight shell 10, inner tank 11, tail plug end cap 21, tail plug end 211, bottle mouth end cap 22, bottle mouth end 221, first diameter R1, No. Second diameter R2, third diameter R3, first shaft length D1, second shaft length D2, third shaft length D3, head depth H1, second depth H2, third depth H3, valve 100, top cover 110, cover The wall 112 , the knob 120 , the enclosure 130 , the sealing ring 132 , the connecting cavity 140 , the expansion port 142 , the support seat 150 , and the sealing strip 152 .

Example 1

Embodiment 1 is basically as shown in FIG. 1 : the gas storage bottle produced by the processing method of this embodiment includes an inner bladder 11 and a lightweight shell 10 that is close to the inner bladder 11 and wrapped on the inner bladder 11 . Wherein, the inner container 11 includes a tail plug end cap 21 and a bottle mouth end cap 22 that are approximately hemispherical.

A tail plug end 211 extending outward and passing through the lightweight housing 10 is welded at the central position of the tail plug end cap 21 . The tail plug end 211 is coaxial with the inner pot 11, and the tail plug end 211 is provided with a connection port in the direction toward the outside.

A tubular bottle mouth end 221 protruding outward is communicated with the central position of the bottle mouth end sealing head 22 . The bottle mouth end 221 is coaxial with the inner pot 11 and the tail plug end 211 .

The center point O of the axis of the inner pot 11 is the center of gravity of the inner pot, and the inner pot 11 takes the cross section passing through the center point O and perpendicular to the axis as the interface, as shown in Figure 1, the inner pot 11 on both sides of the interface (except the bottle Both the port 221) and the lightweight housing 10 are symmetrical in shape and size relative to the interface. Wherein, the inner tank 11 connected between the bottle mouth end sealing head 22 and the tail plug end sealing head 21 can be divided into at least four cylindrical structures. The cylindrical structure connected with the head 22 and the tail plug end cap 21) is called the second cylinder, and its length is the second depth H2, and the cylindrical structure connected with the second cylinder is called the third cylinder, and its length is At the third depth H3, the second cylinder and the third cylinder are symmetrically connected with the same cylinder structure relative to the interface, that is, the tail plug end cap 21, the second cylinder, the third cylinder, the third cylinder, The second cylinder and the bottle mouth end cap 22 are connected in sequence to form the inner container 11 . Between the sealing head (including the bottle mouth end sealing head 22 and the tail plug end sealing head 21 ) and the inner tank cylinder are respectively connected the bottle mouth end curved surface and the tail plug end curved surface, and the bottle mouth end curved surface and the tail plug end curved surface are themselves two. The distance between the two ends is the same, and they are called the depth of the front head and the depth of the back head respectively. The depths of the two heads are H1. 2*(H1+H2+H3)=D1, D1 is the inner tank 11 except the bottle mouth The axial length of the end 221 portion is referred to as the first axial length D1.

The inner average diameter of the inner tank barrel portion is the first diameter R1, the outer average diameter of the inner tank barrel portion is the second diameter R2, and the outer average diameter of the structure corresponding to the inner tank barrel portion of the lightweight shell 10 is the first diameter. If the three diameters are R3, the average thickness of the inner tube body is (R2-R1)/2≤1.5mm.

Wherein, the average thickness of the third cylinder (that is, the average thickness of the inner wall in the length of H3) is smaller than the average thickness of the second cylinder (that is, the average thickness of the inner wall in the length of H2). Among them, the thinnest wall thickness of the third cylinder can be 1.2mm. Compared with the wall thickness of the current gas storage cylinder, which is usually more than 1.5mm, the high-pressure hydrogen storage cylinder produced by this scheme can ensure that the quality of the inner tank 11 becomes lighter and the effective volume is larger, that is, the hydrogen storage density per unit weight is higher. , the hydrogen storage density per unit weight in this embodiment is all above 7.5%.

The lightweight shell 10 is a sac-like structure formed by wrapping the outer surface of the inner bladder 11 and matching the shape of the inner bladder 11 . Like the inner bladder 11 , the light-weight casing 10 also has a tail plug end cap 21 and a bottle mouth end cap 22 and a casing cylindrical portion connecting the bottle mouth end cap 22 and the tail plug end cap 21 . The lightweight shell 10 in this embodiment is made of carbon fiber-epoxy composite material wound according to a certain rule and then coated with resin.

The distance between the bottle end cap 22 of the inner bladder 11 and the outer surface end of the tail plug end cap 21 is the second axis length D2, the average of the bottle end cap 22 of the inner bladder 11 and the tail plug end cap 21 The thickness is (D2-D1)/2. (D2-D1)/2≥1.5mm.

The distance between the bottle mouth end cap 22 of the lightweight shell 10 and the end of the outer surface of the tail plug end cap 21 is the third axial length D3, and the bottle mouth end cap 22 of the lightweight shell 10 and the tail plug end The average thickness of the head 21 is (D3-D2)/2. (D3-D2)/2≥1.5mm.

The distance between the bottle mouth end sealing head 22 and the tail plug end sealing head 21 from the second cylinder and the depth H1 of the sealing head, in order to make the gas storage bottle the lightest weight under the premise of the same effective volume, in the production process When the inner liner 11 is used, H1/R1≤0.3, when H1/R1=0.3, when the inner liner 11 accommodates the same mass of hydrogen, the entire gas cylinder is the lightest.

The weight-to-volume ratio of the gas cylinder is greater than 0.28 and less than or equal to 0.43. In this embodiment, the weight-to-volume ratio of the gas cylinder is 0.292. Compared with the prior art, the gas storage cylinder processed in this embodiment is lightweight and has a smaller weight-to-volume ratio, which is more conducive to the battery life of the fuel cell, and is conducive to the use in application environments such as drones that have stricter weight requirements for the fuel cell. .

The gas storage cylinder in this embodiment can be used not only on drones, but also in application environments such as motorcycles and field camping.

The specific implementation process is as follows:

First, the inner pot 11 is produced.

In this embodiment, an aluminum inner liner is used: the polished cylindrical aluminum plate is placed on the drawing die, and the aluminum plate is punched and cold-drawn into a cup-shaped body through the deep-drawing die. The cup-shaped body includes a tail plug end cap 21 And the inner tank cylinder which is integrally formed with the end cap 21 of the tail plug. The inner tube body is deep-drawn three times to form a structure with a thin middle and thick ends.

The cup-shaped body is placed on the strong-spinning equipment, and the mouth is closed after being thinned by strong-spinning. The cylinder and the second cylinder are connected in sequence in an integrally formed cylindrical structure, wherein the wall thickness of the third cylinder is smaller than that of the second cylinder.

After the wall thickness of each part in the inner tube body reaches the requirements (that is, the average thickness of the inner tube body of the inner tube 11 is (R2-R1)/2≤1.5mm), the cup-shaped body tube is closed by spinning. The open end of the like structure is processed to leave only the bottle mouth end cap 22 where the bottle mouth end 221 is installed. Then, a tail plug end 211 is installed at the center of the closed end of the tail plug end sealing head 21 , and the inner tank 11 is conveniently connected to other processing equipment in the subsequent processing process by installing the tail plug end 211 . The inner pot 11 is formed into an aluminum inner pot with two ends of the bottle end cap 22 and the tail plug end cap 21 respectively.

In the process of strong spinning and closing, it needs to be carried out at a temperature of 420-450 ° C. In the process of strong spinning and thinning, the rotation speed of 550-650 rpm is used. Rotation speed.

After the aluminum liner 11 is processed and formed, heat treatment is required: the aluminum liner 11 is placed in a heating furnace, heated to 550°C for a holding time of 80 minutes for solid solution, and kept at 175°C for 300 minutes for aging treatment.

After the aluminum inner liner is processed and formed, the straight thread that meets the size and precision requirements is machined on the aluminum inner liner with a CNC lathe.

The inner surface of the aluminum liner also needs to be polished on the inner surface. The mechanical polishing method is used, and the small particle abrasive and the grinding liquid are mixed and poured into the inner cavity of the aluminum liner. The inner surface of the liner is fully polished.

Then, the lightweight case 10 is produced.

First make, wrap the layer; wind the carbon fiber-epoxy system composite material on the inner liner 11: the aluminum inner liner 11 fabricated in the previous steps will be overlapped along its outer wall by hoop winding and helical winding. The carbon fiber-epoxy system composite material is wound to form a winding layer, and a semi-finished gas storage cylinder is obtained. The average thickness of the winding layer is B1.

Next, apply the light-curing resin layer: evenly coat the light-curing resin on the outer surface of the winding layer of the semi-finished gas cylinder, and put the semi-finished gas cylinder coated with the light-curing resin into the existing light-curing device to pass ultraviolet rays. Irradiation is performed until curing is complete. The average thickness of the photocurable resin layer is B2.

The average thickness of the lightweight shell 10 is B1+B2, where (R3-R2)/2≤B1+B2≤(D3-D2)/2. Among them, 1.2mm≤(R3-R2)/2≤1.5mm, 1.5mm≤(D3-D2)/2.

Among them, the specific method of using the carbon fiber-epoxy system composite material for winding is as follows: first, the aluminum inner tank 11 is cantilevered on the tooling of the winding machine through the tail plug end 211, and the carbon fiber-epoxy system composite material is impregnated into the resin matrix. , and a predetermined tension is then wound on the outer wall of the aluminum inner pot 11 in a cross-overlapping manner of hoop and helical winding.

The aluminum liner needs to be cured after the carbon fiber-epoxy system composite material is wound. The specific curing method is as follows: put the aluminum liner wound with the carbon fiber-epoxy system composite material into the continuous curing furnace and keep the aluminum liner level. Autorotate, first heat up to 80°C to 110°C, then heat up again from 22 to 130°C to 140°C, cure for 4.5h to 6.5h, lower the furnace temperature to below 60°C and then release.

Embodiment 2

The difference between this embodiment and the first embodiment is that the gas storage bottle has a bottle mouth and a valve 100 for capping the bottle mouth. As shown in FIG. 2 , the valve 100 includes a circular cover top 110 and a cover wall 112 integrally formed with the cover top 110 into an annular structure. A hole is formed on the cover wall 112 , and the knob 120 for adjusting the tightness of the valve 100 extends into valve 100. An enclosure 130 is integrally formed and connected below the cover wall 112 . A cover bottom is mounted between the enclosure 130 and the cover wall 112 . The cover bottom and the cover top 110 have the same shape. The knob 120 is welded with a screw extending between the cover top 110 and the cover bottom. The end of the screw extending into the valve 100 is connected with a cam combination composed of a plurality of cams, so that turning the knob 120 can make the cover top 110 and the cover bottom approach or move away from each other, so that the cover bottom is relative to the cover top 110 up and down along the cover wall 112 moves up and down.

The contact position of the cover bottom and the cover wall 112 is integrally formed with outward protrusions, and a plurality of grooves corresponding to the protrusions are vertically opened on the inner side of the cover wall 112 for the protrusions of the cover bottom, which is convenient for the cover bottom. The connection with the cover wall 112 also facilitates the vertical sliding of the plurality of protrusions along the groove.

As shown in FIG. 3 , two support bases 150 are installed on the bottom surface of the cover bottom. By adjusting the knob 120, the support bases 150 of the cover bottom are made closer to the bottle mouth of the gas storage bottle, which is used to strengthen the cover bottom and the gas storage bottle. The contact strength of the mouth plays the role of sealing the mouth of the bottle. At the same time, due to the adjustment knob, there can be a certain space between the bottom of the valve 100 and the bottle mouth of the gas storage cylinder, so as to adjust the pressure of the gas storage cylinder.

The enclosure 130 is arranged obliquely, the top of the enclosure 130 is integrally formed and seamlessly connected with the cover wall 112 , and the bottom end of the enclosure 130 is sealed and welded with a sealing ring 132 for bonding with the lightweight shell of the gas cylinder. When the valve 100 is used, when the valve 100 is covered on the bottle mouth of the gas storage cylinder, the bottom of the cover is in contact with the bottle mouth by adjusting the knob 120, and the enclosing cover 130 is closely attached to the curved surface of the head of the gas storage bottle. The sealing ring 132 can form a sealed space between the entire valve 100 and the gas cylinder.

In order to increase the tightness between the valve 100 and the gas cylinder, a sealing strip 152 made of the same material as the sealing ring is installed on the inner surface of the enclosure 130 . Through the sealing ring 132 and the sealing strip 152, the enclosure 130 can be tightly connected with the light-weight casing of the gas cylinder. In this embodiment, the sealing ring 132 , the sealing strip 152 and the support base 150 are all made of soft materials with certain viscosity, such as rubber, gel, and the like.

In addition, a connecting cavity 140 is welded on one side of the enclosure 130 , a space capable of accommodating gas is located between the connecting cavity 140 and the enclosure 130 , and a gas nozzle communicates between the connecting cavity 140 and the enclosure 130 . An expansion port 142 is opened on the outer side of the connection cavity 140 for other pipes to communicate with the gas nozzle. The structure of the gas nozzle is the existing one, that is, the commonly used device for connecting the gas storage bottle to other gas-using mechanisms, which will not be described in detail here.

When processing the special gas storage bottle for drones, when completing the processing of the inner tank 11, it is necessary to determine the diameter of the top 110 and the bottom of the cover according to the diameter of the bottle mouth end 221. The diameter and curvature of the curved surface of 22 determine the shape of the enclosure 130. After these parameters are determined, a mold is made, and a connection structure of the cover roof 110 , the cover wall 112 and the enclosure 130 is formed by pouring. Then, a mold for the cover bottom is made, the diameter of the cover bottom is the same as that of the cover top 110, and at the same time, a plurality of evenly distributed protrusions protrude outward from the cover bottom, and a plurality of protrusions corresponding to the cover bottom are opened on the inner surface of the cover wall 112. corresponding groove.

Before installing the cover bottom, two symmetrical holes are opened on the side wall of the enclosure 130 , one for the screw for the knob to be welded in, and the other for installing the air nozzle that communicates with the connecting cavity 140 . A cam group consisting of a plurality of cams is installed on one end of the screw rod extending into the valve 100 , so that when the knob 120 is rotated in one direction, the cams can gradually change in the trend of lengthening or shortening the sides. After the cam set is installed, the cover bottom is snapped into the groove of the cover wall 112 through the protrusion, and then a ring-shaped blocking plate preventing the cover bottom from sliding out of the groove is welded between the cover wall 112 and the enclosure 130 . Two support bases 150 in a "U" shape are welded on the bottom surface of the cap bottom near the bottle mouth, so that the bottle mouth can be clamped tightly. Then, a connecting cavity 140 for wrapping the gas nozzle is welded around the gas nozzle. The connecting cavity 140 is also first produced by a mold, and an expansion port 142 is opened on the outer side of the connecting cavity 140 .

Embodiment 3

The difference between this embodiment and the second embodiment is that a sealed pressure relief chamber is divided and installed in the connection chamber 140 , and nitrogen gas is stored in the pressure relief chamber. The pressure relief chamber is installed between the enclosure 130 and the expansion port 142 . If the gas cylinder leaks, opening the pressure relief chamber can make the flammable gas such as hydrogen react with nitrogen before it leaks from the expansion port 142 . An air valve is opened at the contact position between the pressure relief chamber and the enclosure 130 for making the pressure relief chamber communicate with the enclosure 130. The air valve structure is the existing one. Opening this air valve can make the pressure relief chamber and the enclosure 130 communicate with each other. The enclosed space is connected. Directly storing nitrogen at high pressure in the pressure relief chamber can effectively reduce the adverse effects of hydrogen leakage and avoid explosion accidents through the neutralization reaction of hydrogen and nitrogen. Before installing the connection chamber 140, it is necessary to install the air valve at the position of the connection chamber and the enclosure 130, and then place the pre-stored nitrogen compression bag in the separately isolated connection chamber 140 near the enclosure 130 to form a pressure relief cavity, so that the pressure relief cavity and the air valve can communicate.

Embodiment 4

The difference between this embodiment and the first embodiment is that the bottle mouth end cap 22 and the tail plug end cap 21 of the aluminum liner are turned after being formed. For the turning tool, the deviation caused by the secondary positioning is reduced, the turning trajectory and the closing trajectory are consistent, and the shape of the front head and the rear head is ensured, and the wall thickness of the front head and the rear head of the inner tank is consistent and stable.

Embodiment 5

In this embodiment, the inclination of the circumferential winding and the cross section of the gas storage cylinder is 1-2°; the inclination of the spiral winding and the longitudinal section of the gas storage cylinder is 5-35°, and the pitch of the helical winding is the inner pot 11 Less than one percent of the length, that is, the pitch of the helical winding ≤ D2/100. The oblique direction of the helical winding is opposite to the oblique direction of the longitudinal winding. The cross section of the gas storage cylinder refers to the section passing through the center of the gas storage cylinder and the outline is oval; the longitudinal section of the gas storage cylinder refers to the section passing through the center of the gas storage cylinder and the outline is circular.

The descriptions of the specific embodiments and the like in the above specification can be used to interpret the contents of the claims.

Claims (10)

1. A gas bomb processing method is characterized in that: the method comprises the following steps:

stamping and deep-drawing the aluminum material for multiple times to form a cup-shaped body with one closed end and one opened end;

the cup-shaped body is closed by strong rotation to form an inner container with a bottle mouth end sealing head, an inner container barrel and a tail plug end sealing head;

in the process of strong rotation, the average thickness of the liner cylinder is less than or equal to 1.5 mm.

2. The method of claim 1, wherein: in the drawing process, the closed end of the cup-shaped body is drawn to form a tail plug end socket through three times of drawing, and the part between the closed end and the open end is drawn to form the liner barrel.

3. The method of claim 2, wherein: in the process of deep drawing and strong spinning closing up, the wall thickness of the inner container barrel is gradually thinned from two ends to the middle.

4. The method of claim 1, wherein: in the strong rotation closing process, the opening end of the cup-shaped body is gradually folded to form a bottle mouth end sealing head with a bottle mouth end; the bottle mouth end sealing head forms a bottle mouth end curved surface connected between the bottle mouth end and the liner cylinder body, and the depth of the bottle mouth end curved surface is the depth of the front sealing head.

5. The method of claim 4, wherein: a tail plug end curved surface is integrally formed between the tail plug end seal head and the liner cylinder body; the depth of the tail plug end curved surface is the depth of the rear end socket; the depth of the rear end socket is equal to that of the front end socket.

6. The method of claim 5, wherein: in the deep drawing and strong spinning processes, the average diameter of the liner cylinder is respectively greater than the depth of the front seal head and the depth of the rear seal head.

7. The method of claim 6, wherein: after the closing process, the ratio of the depth of the front end enclosure to the depth of the rear end enclosure to the average diameter of the liner cylinder is less than or equal to 0.3.

8. The method of claim 7, wherein: in the process of strong rotation, the wall thickness of part of the inner container barrel is thinned to 1.2 mm.

9. The method of claim 1, wherein: the closing process is carried out at a temperature of 420-450 ℃.

10. The method of claim 9, wherein: the strong rotation and closing process is carried out at the rotation speed of 550-650 rpm.

Images