Conical top steel drum seal head formed at one time through hydraulic stretching technology

Abstract

The utility model relates to the technical field of conic node end sockets, and discloses a conic node steel drum end socket formed at a time by utilizing a hydraulic stretching technology, which comprises a conic node end socket main body, a first gear is arranged on the outer surface of an end socket neck, and a fixing ring is arranged on the outer surface of the end socket neck and above the first gear. A sliding groove is formed in the outer surface of the fixing ring, a sliding block is slidably connected into the sliding groove, a fixing plate is installed on the surface of the sliding block, a driving mechanism is arranged on the upper surface of the fixing plate, and a collecting mechanism is arranged on the portion, located on the front side of the driving mechanism, of the upper surface of the fixing plate. The motor drives the second gear to rotate, the brush is driven to clean the surface of the cone top end socket body, and dust accumulated on the surface of the cone top end socket body is swept away; a fan in the collecting mechanism sucks the cleaned dust into a collecting box, so that dust cleaning and collecting are completed, manual cleaning is not needed, and time and labor are saved; collected dust falls into the collection drawer and can be drawn out at any time, and the collected dust is poured out.

Description

Technical Field

[0001] The utility model relates to the technical field of conical top head, in particular to a conical top steel barrel head formed by using hydraulic stretching technology in one step. Background Technique

[0002] The existing production process of arc-shaped steel barrel covers mainly relies on multi-step machining and welding processes, which have problems such as complex processes, low production efficiency, and poor forming accuracy. In addition, multi-step forming and welding are likely to cause degradation of material properties and stress concentration, affecting the quality of finished products. Hydraulic stretching technology has gradually been widely used in the field of metal forming due to its high precision and high efficiency.

[0003] In the manufacturing process of industrial containers and storage barrels, the forming of arc-shaped steel barrel covers is an important and complex step. The traditional production process of arc-shaped steel barrel covers mainly relies on multi-step machining and welding processes, which have the following main limitations: Traditional processes usually require multiple steps such as shearing, bending, welding, and grinding, and each step increases the process complexity and time cost. Welding is an essential step, but the welding process is complex, requires skilled workers to operate, and the welding quality directly affects the strength and sealing performance of the finished product. Multi-step operations result in a long production cycle, affecting the overall production efficiency. A large amount of manual operation is required, and the degree of automation is low, resulting in high labor costs. Multi-step processing is prone to cumulative errors, and it is difficult to guarantee the forming accuracy. The welding and grinding processes are likely to cause material deformation and surface defects, affecting the appearance and performance of the product. The heat affected zone of the material will be caused during the welding and multiple processing processes, resulting in degradation of material properties, such as reduced strength and poor toughness. Stress concentration: There are many stress concentration points in the traditional process, which are prone to fatigue failure and cracking.

[0004] At present, most of the conical top heads on the market are produced by spinning processes. The thickness at the connection of the steel plates is relatively thick, so the overall thickness is uneven. Since the connection is welded, it also affects the overall strength. Moreover, in the long-term storage process of steel barrels such as petroleum steel barrels and chemical steel barrels with conical top heads, dust will gradually accumulate on the surface of the barrel covers, and regular manual cleaning is required, which is time-consuming and laborious. Content of the Utility Model

[0005] The purpose of the utility model is to provide a conical top steel barrel head formed by using hydraulic stretching technology in one step to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution:

[0007] A conical top steel barrel head formed by one-time molding using hydraulic stretching technology, comprising a conical top head body. A head skirt is installed on the outer surface of the lower end of the conical top head body, and a head neck is installed at the upper end of the conical top head body. The conical top head body and the head skirt are integrally formed, and the conical top head body and the head neck are also integrally formed. A first gear is installed on the outer surface of the head neck, and a fixing ring is installed above the first gear on the outer surface of the head neck. A chute is opened on the outer surface of the fixing ring, and a slider is slidably connected inside the chute. A fixing plate is installed on the surface of the slider. At one end of the lower surface of the fixing plate, two fixing blocks are symmetrically installed. A first fixing bolt movably penetrates through one side surface of the fixing block, and a brush is installed between the two fixing blocks. A driving mechanism is arranged on the upper surface of the fixing plate, and a collecting mechanism is arranged on the front side of the driving mechanism on the upper surface of the fixing plate.

[0008] As a further scheme of the present utility model: The driving mechanism includes a motor base, a motor is installed inside the motor base, a fixing shaft is installed at the output end of the motor, and a second gear is installed at the lower end of the fixing shaft.

[0009] As a further scheme of the present utility model: A plurality of second fixing bolts movably penetrate through the outer edge of the motor base, and the plurality of second fixing bolts are symmetrically distributed. The lower end of the second fixing bolt is threadedly connected inside the fixing plate, and a plurality of heat dissipation holes are opened on the outer surface of the motor base.

[0010] As a further scheme of the present utility model: The collecting mechanism includes a collecting box, a blower is installed on the upper surface of the collecting box, a first air duct is connected to the upper end of the blower, and a second air duct is connected to the right end of the blower. One end of the second air duct is connected to a collecting main pipe, and a plurality of collecting branch pipes are installed through the lower surface of the collecting main pipe. An air outlet pipe is installed on the upper surface of the collecting box on one side of the blower, and a filter screen is installed at the upper end of the air outlet pipe.

[0011] As a further scheme of the present utility model: A collecting drawer movably penetrates through the front surface of the collecting box, a baffle is installed at the front end of the collecting drawer, and a handle is installed on the front surface of the baffle.

[0012] As a further scheme of the present utility model: A plurality of positioning grooves are evenly opened on the front surface of the collecting box above the collecting drawer, a first magnetic block is installed inside the positioning groove, a plurality of positioning blocks are installed on the upper surface of the baffle, and a second magnetic block is installed on the rear surface of the positioning block.

[0013] As a further solution of the utility model: a connection block is installed at the outer end position of the main collection pipe, one end of the connection block is installed on the upper surface of the brush, a connection bolt penetrates through and is threadedly connected to the upper surface of the connection block, and the lower end of the connection bolt fits against the surface of the main collection pipe.

[0014] As a further solution of the utility model: the lower surface of the brush is movably attached to the surface of the conical head main body, one end of the first fixing bolt is threadedly connected inside the brush, the lower end of the motor base is installed on the upper surface of the fixing plate, the fixed shaft movably penetrates through the fixing plate, and the first gear is meshed with the second gear.

[0015] As a further solution of the utility model: the lower end of the collection box is installed on the upper surface of the fixing plate, one end of the first air duct penetrates and is connected to the upper surface of the collection box, and the main collection pipe is located on the right side of the brush.

[0016] As a further solution of the utility model: the number of the first magnetic block and the second magnetic block is equal, the first magnetic block faces the second magnetic block, and the first magnetic block is attracted to the second magnetic block.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] In the utility model, the conical head main body and the head skirt are integrally formed, and the conical head main body and the head neck are also integrally formed, with high overall strength; the conical head main body is integrally stretch-formed, which is faster than the existing spinning process, has a smooth surface, the sheet material will not become thinner, and the cost is reduced; the head skirt adopts a stretching and flanging process, and the head neck is stretched, with fewer processes and lower cost.

[0019] In the utility model, the motor drives the second gear to rotate, so that the fixing plate rotates around the fixed ring, driving the brush to clean the surface of the conical head main body and sweeping away the dust accumulated on its surface; the fan in the collection mechanism sucks the cleaned dust into the collection box through the collection branch pipe, the main collection pipe, the second air duct and the first air duct, thus completing the cleaning and collection of the dust, without manual cleaning, saving time and effort; the collected dust falls into the collection drawer and can be pulled out at any time to pour out the collected dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a conical steel barrel head formed by using a hydraulic stretching technology at one time;

[0021] Figure 2 It is a partial schematic diagram of a conical steel barrel head formed by using a hydraulic stretching technology at one time;

[0022] Figure 3It is a conical top steel barrel head formed in one step by using hydraulic stretching technology Figure 2 Enlarged view of A in

[0023] Figure 4 Explosion diagram of the driving mechanism in a conical top steel barrel head formed in one step by using hydraulic stretching technology

[0024] Figure 5 Schematic structural diagram of the collection mechanism in a conical top steel barrel head formed in one step by using hydraulic stretching technology

[0025] Figure 6 It is a conical top steel barrel head formed in one step by using hydraulic stretching technology Figure 5 Enlarged view of B in

[0026] In the figure: 1, main body of conical top head; 2, head skirt; 3, head neck; 4, first gear; 5, fixing ring; 6, chute; 7, slider; 8, fixing plate; 9, fixing block; 10, first fixing bolt; 11, brush; 12, driving mechanism; 13, motor base; 14, motor; 15, fixing shaft; 16, second gear; 17, second fixing bolt; 18, heat dissipation hole; 19, collection mechanism; 20, collection box; 21, fan; 22, first air duct; 23, second air duct; 24, main collection pipe; 25, collection branch pipe; 26, air outlet pipe; 27, filter screen; 28, collection drawer; 29, baffle; 30, handle; 31, positioning groove; 32, first magnetic block; 33, positioning block; 34, second magnetic block; 35, connecting block; 36, connecting bolt. Specific implementation method

[0027] Please refer to Figure 1, in the embodiments of the present utility model, a conical top steel barrel head formed by one-time molding using hydraulic stretching technology includes a conical top head body 1. An edge skirt 2 of the head is installed on the outer surface of the lower end of the conical top head body 1, and a head neck 3 is installed at the upper end of the conical top head body 1. The conical top head body 1 and the edge skirt 2, as well as the conical top head body 1 and the head neck 3, are integrally formed and made by hydraulic stretching technology. Hydraulic stretching technology has gradually been widely used in the field of metal forming. Its main advantages include: The hydraulic system can provide stable and controllable pressure, enabling the metal material to deform uniformly, with high forming accuracy and maintaining the thickness quality of the original sheet unchanged for one-time molding. By optimizing the die design and hydraulic control, a complex-shaped arc-shaped steel barrel cover can be formed in one-time, reducing the processing steps and error accumulation. High degree of automation: The hydraulic stretching process can achieve a high degree of automation, reducing manual intervention and significantly improving production efficiency. Rapid prototyping: The rapid response and precise control of the hydraulic system result in a short molding cycle, suitable for mass production. Uniform deformation: The hydraulic stretching process can make the material deform uniformly, reducing stress concentration and enhancing the mechanical properties of the finished product. The stretched arc exceeds 90 degrees, which is more conducive to the output of the materials stored in the barrel. Cooling control: By optimizing the cooling technology, the temperature of the material can be effectively controlled during the molding process to avoid material performance degradation. Convenient die replacement: The modular design of the hydraulic stretching equipment enables the rapid replacement of dies of different specifications and shapes to adapt to diverse production requirements. Adaptability to multiple materials: Hydraulic stretching technology is applicable to a variety of metal materials, including steel, aluminum, titanium alloy, etc. Hydraulic stretching: The hydraulic system adopts servo control and realizes precise adjustment of pressure and flow through closed-loop control. According to the thickness of the steel plate and the forming requirements, the initial stretching pressure and speed are set. The pressure is generally in the range of 50 to 200 MPa, and the stretching speed is controlled at 0.1 to 10 mm / s. The pre-treated steel plate is placed in the die, the hydraulic system is started, and the pressure is gradually increased to cause plastic deformation of the steel plate in the die. The process parameters during the stretching process, such as pressure, speed, temperature, etc., are monitored in real time through the intelligent control system, and the parameters are automatically adjusted to ensure uniform deformation of the steel plate.

[0028] Cooling control: Cooling oil or cooling water is used as the cooling medium, and the appropriate medium is selected according to the process requirements. The temperature and flow rate of the cooling medium are adjusted in real time through the control system to ensure uniform temperature of the steel plate and the die during the molding process. During the stretching process, the cooling medium flows through the cooling channels in the die to control the temperature of the steel plate and the die and avoid local overheating. After the stretching forming is completed, continue to cool for a period of time to rapidly cool the steel plate to room temperature and prevent deformation caused by thermal stress.

[0029] Forming completion: After the cooling is completed, turn off the hydraulic system and the cooling system, open the mold, take out the formed arc-shaped steel drum cover, check whether there are defects such as cracks and depressions on the surface of the finished product, ensure that the surface is smooth and defect-free. According to needs, perform surface treatment on the finished product, such as oiling, rust prevention treatment, etc., to improve the corrosion resistance and appearance quality of the finished product. Perform heat treatment (such as annealing, normalizing, etc.) on the finished product to further improve the mechanical properties of the material.

[0030] Quality inspection: Use precision measuring tools to measure the dimensions of the formed arc-shaped steel drum cover to ensure that the dimensions meet the design requirements. The measurement contents include key dimensions such as radian, diameter, and thickness. Check whether there are defects such as scratches, cracks, and depressions on the surface of the finished product to ensure that the surface is smooth and defect-free. Use non-destructive testing techniques (such as ultrasonic testing, magnetic particle testing, etc.) to check for internal defects to ensure the quality of the finished product. Perform mechanical property tests on the finished product, including tensile strength, hardness, toughness, etc., to ensure that the performance of the finished product meets the design requirements.

[0031] The entire conical top head is installed on steel drums of types such as electrolyte, catalyst, petroleum, etc. The main body 1 of the conical top head is integrally drawn, which is faster than the existing spinning process, has a smooth surface, and the sheet material will not become thinner; the skirt 2 of the head adopts a stretching and flanging process, and the neck 3 of the head is drawn. The process is less, and a flange can be welded to its end for connecting a pressure detection device.

[0032] In Figures 1 to 4 : A first gear 4 is installed on the outer surface of the head neck 3, and a fixing ring 5 is installed on the outer surface of the head neck 3 above the first gear 4. A chute 6 is opened on the outer surface of the fixing ring 5. A slider 7 is slidably connected inside the chute 6. A fixing plate 8 is installed on the surface of the slider 7. At one end of the lower surface of the fixing plate 8, two fixing blocks 9 are symmetrically installed. One side surface of the fixing block 9 is movably penetrated and connected with a first fixing bolt 10. A brush 11 is installed between the two fixing blocks 9. The lower surface of the brush 11 is movably attached to the surface of the conical top head main body 1. One end of the first fixing bolt 10 is threadedly connected inside the brush 11. A driving mechanism 12 is arranged on the upper surface of the fixing plate 8. The driving mechanism 12 includes a motor base 13. The lower end of the motor base 13 is installed on the upper surface of the fixing plate 8. A motor 14 is installed inside the motor base 13. The output end of the motor 14 is installed with a fixing shaft 15. The fixing shaft 15 movably penetrates the fixing plate 8. The lower end of the fixing shaft 15 is installed with a second gear 16. The first gear 4 is meshed and connected with the second gear 16. A plurality of second fixing bolts 17 are movably penetrated through the outer edge of the motor base 13. The plurality of second fixing bolts 17 are symmetrically distributed. The lower end of the second fixing bolt 17 is threadedly connected inside the fixing plate 8;

[0033] The motor 14 is electrically connected to an external control system and operates automatically through the external control system; the motor 14 can drive the second gear 16 to rotate through the fixed shaft 15. At this time, while the second gear 16 is rotating, it will drive the fixed plate 8 to rotate around the fixed ring 5, thereby driving the brush 11 to scrape off the dust on the surface of the conical top head body 1;

[0034] The number of the first fixing bolts 10 on each fixing block 9 is preferably two, which are used to firmly fix the brush 11. Removing the first fixing bolts 10 can remove the brush 11, which is convenient for replacement or cleaning;

[0035] The lower surface of the brush 11 is provided with bristles, and the bristles are attached to the surface of the conical top head body 1.

[0036] In Figure 4 : A plurality of heat dissipation holes 18 are formed on the outer surface of the motor base 13;

[0037] The heat dissipation holes 18 are used to dissipate heat from the motor 14, and the plurality of heat dissipation holes 18 are evenly distributed.

[0038] In Figure 1 、 Figure 2 、 Figure 5 : A collection mechanism 19 is arranged on the upper surface of the fixed plate 8 in front of the driving mechanism 12. The collection mechanism 19 includes a collection box 20. The lower end of the collection box 20 is installed on the upper surface of the fixed plate 8. A blower 21 is installed on the upper surface of the collection box 20. The upper end of the blower 21 is connected to a first air duct 22. One end of the first air duct 22 is connected through the upper surface of the collection box 20. The right end of the blower 21 is connected to a second air duct 23. One end of the second air duct 23 is connected to a collection main pipe 24. The collection main pipe 24 is located on the right side of the brush 11. A plurality of collection branch pipes 25 are installed through the lower surface of the collection main pipe 24. An air outlet pipe 26 is installed on the upper surface of the collection box 20 on one side of the blower 21. A filter screen 27 is installed at the upper end of the air outlet pipe 26;

[0039] The connection between the collection branch pipe 25 and the collection main pipe 24 is detachable. The collection branch pipe 25 can be connected to the collection main pipe 24 by means of threaded connection; the inside of the collection branch pipe 25 communicates with the inside of the collection main pipe 24. The lower end of the collection branch pipe 25 faces the surface of the conical top head body 1. After the blower 21 is started, an attraction force is generated, and the attraction force sucks the dust scraped off from the surface of the conical top head body 1 into the collection box 20; the filter screen 27 is used to block the dust and discharge the gas;

[0040] The blower 21 is electrically connected to an external control system and operates automatically through the external control system.

[0041] In Figure 5In the middle: A collection drawer 28 is movably and penetratingly connected to the front surface of the collection box 20. A baffle 29 is installed at the front end of the collection drawer 28, and a handle 30 is installed on the front surface of the baffle 29;

[0042] The collected dust will fall into the collection drawer 28, facilitating timely cleaning.

[0043] In Figure 5 and Figure 6 In the middle: A plurality of positioning grooves 31 are evenly formed in the front surface of the collection box 20 above the collection drawer 28. A first magnetic block 32 is installed inside the positioning groove 31. A plurality of positioning blocks 33 are installed on the upper surface of the baffle 29, and a second magnetic block 34 is installed on the rear surface of the positioning block 33. The number of the first magnetic blocks 32 is equal to that of the second magnetic blocks 34. The first magnetic block 32 faces the second magnetic block 34, and the first magnetic block 32 is attracted to the second magnetic block 34;

[0044] When the rear surface of the baffle 29 fits against the front surface of the collection box 20, the first magnetic block 32 just fits against the second magnetic block 34, thereby fixing the baffle 29 and preventing dust leakage.

[0045] In Figure 5 In the middle: A connecting block 35 is installed at the outer end position of the collecting main pipe 24. One end of the connecting block 35 is installed on the upper surface of the brush 11. A connecting bolt 36 penetrates and is threadedly connected to the upper surface of the connecting block 35, and the lower end of the connecting bolt 36 fits against the surface of the collecting main pipe 24;

[0046] Remove the collecting branch pipe 25 and then loosen the connecting bolt 36, and the collecting main pipe 24 can be removed for convenient cleaning.

[0047] The working principle of the present utility model is as follows: When it is necessary to clean the surface of the conical head main body 1, the motor 14 and the fan 21 are started simultaneously; the motor 14 drives the second gear 16 to rotate through the fixed shaft 15. Since the second gear 16 is meshed and connected with the first gear 4, the second gear 16 will rotate. While rotating, it drives the fixing plate 8 to rotate around the fixed ring 5 through the slider 7 and the sliding groove 6. The lower surface of the brush 11 will clean the surface of the conical head main body 1, scrape the dust that adheres firmly, and make the dust disperse to the periphery. At the same time, the fan 21 generates an attraction force, and the dust is sucked into the collection box 20 through the collecting branch pipe 25, the collecting main pipe 24, the second air pipe 23, and the first air pipe 22. The dust falls into the collection drawer 28 by its own gravity, thereby completing the cleaning and collection of the dust; Every once in a while, the staff can directly pull the handle 30 to separate the first magnetic block 32 from the second magnetic block 34, and then the collection drawer 28 can be pulled out to facilitate the cleaning of the dust inside it.

[0048] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0049] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A conical top steel barrel head formed in one step by using hydraulic stretching technology, comprising a conical top head body (1), a head side skirt (2) is installed on the outer surface of the lower end of the conical top head body (1), and a head neck (3) is installed at the upper end of the conical top head body (1), characterized in that, The conical top head body (1) and the head skirt (2) and the conical top head body (1) and the head neck (3) are integrally formed. A first gear (4) is installed on the outer surface of the head neck (3), and a fixing ring (5) is installed above the first gear (4) on the outer surface of the head neck (3). A chute (6) is formed on the outer surface of the fixing ring (5). A slider (7) is slidably connected inside the chute (6). A fixing plate (8) is installed on the surface of the slider (7). Two fixing blocks (9) are symmetrically installed at one end of the lower surface of the fixing plate (8). A first fixing bolt (10) movably penetrates through one side surface of the fixing block (9). A brush (11) is installed between the two fixing blocks (9). A driving mechanism (12) is arranged on the upper surface of the fixing plate (8), and a collecting mechanism (19) is arranged on the front side of the driving mechanism (12) on the upper surface of the fixing plate (8).

2. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 1, characterized in that, The driving mechanism (12) includes a motor base (13). A motor (14) is installed inside the motor base (13). A fixed shaft (15) is installed at the output end of the motor (14). A second gear (16) is installed at the lower end of the fixed shaft (15).

3. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 2, characterized in that, A plurality of second fixing bolts (17) movably penetrate through the outer edge of the motor base (13). The plurality of second fixing bolts (17) are symmetrically distributed. The lower end of the second fixing bolt (17) is threadedly connected inside the fixing plate (8). A plurality of heat dissipation holes (18) are formed on the outer surface of the motor base (13).

4. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 1, wherein The collecting mechanism (19) includes a collecting box (20). A blower (21) is installed on the upper surface of the collecting box (20). The upper end of the blower (21) is connected to a first air duct (22), and the right end of the blower (21) is connected to a second air duct (23). One end of the second air duct (23) is connected to a collecting main pipe (24). A plurality of collecting branch pipes (25) are installed through the lower surface of the collecting main pipe (24). An air outlet pipe (26) is installed on the upper surface of the collecting box (20) on one side of the blower (21). A filter screen (27) is installed at the upper end of the air outlet pipe (26).

5. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 4, characterized in that, A collecting drawer (28) movably penetrates through the front surface of the collecting box (20). A baffle (29) is installed at the front end of the collecting drawer (28). A handle (30) is installed on the front surface of the baffle (29).

6. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 5, characterized in that, A plurality of positioning grooves (31) are evenly formed on the front surface of the collecting box (20) above the collecting drawer (28). A first magnet (32) is installed inside the positioning groove (31). A plurality of positioning blocks (33) are installed on the upper surface of the baffle (29). A second magnet (34) is installed on the rear surface of the positioning block (33).

7. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 4, wherein, A connecting block (35) is installed at the outer end position of the collecting main pipe (24). One end of the connecting block (35) is installed on the upper surface of the brush (11). A connecting bolt (36) penetrates through and is threadedly connected to the upper surface of the connecting block (35). The lower end of the connecting bolt (36) abuts against the surface of the collecting main pipe (24).

8. A method for one-time forming a conical top steel barrel head using hydraulic stretching technology according to claim 2, characterized in that, The lower surface of the brush (11) is movably attached to the surface of the conical head main body (1). One end of the first fixing bolt (10) is threadedly connected inside the brush (11). The lower end of the motor base (13) is installed on the upper surface of the fixing plate (8). The fixed shaft (15) movably penetrates through the fixing plate (8). The first gear (4) is meshed and connected to the second gear (16).

9. A method for forming a conical top steel barrel head in one step using a hydraulic stretching technique according to claim 4, characterized in that, The lower end of the collecting box (20) is installed on the upper surface of the fixing plate (8). One end of the first air duct (22) penetrates through and is connected to the upper surface of the collecting box (20). The collecting main pipe (24) is located on the right side of the brush (11).

10. A method for one - time forming the conical top steel barrel head by using hydraulic stretching technology according to claim 6, characterized in that, The number of the first magnetic blocks (32) is equal to that of the second magnetic blocks (34). The first magnetic blocks (32) are opposite to the second magnetic blocks (34), and the first magnetic blocks (32) are attracted to the second magnetic blocks (34).

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