KR-102962109-B1 - PRESSURE VESSEL AND MANUFACTURING METHOD THEREOF

Abstract

An embodiment of the present invention relates to a method for manufacturing a pressure vessel, comprising: a preparation step of providing a boss made of metal material; a processing step of processing a concave-convex pattern on the outer surface of the boss; and a winding step of winding a reinforcing material so as to pass through the concave-convex pattern on the outer surface of a liner including the boss; thereby, an advantageous effect of improving quality and durability and lowering the defect rate can be obtained.

Inventors

• 이동선

Assignees

• 현대자동차주식회사
• 기아 주식회사

Dates

Publication Date

20260511

Application Date

20210423

Claims (20)

1. Preparation step for providing a metal boss; A processing step for processing a concave-convex pattern on the outer surface of the above boss; and A winding step of winding a reinforcing material onto the outer surface of a liner including the boss, so as to pass through the uneven pattern; Includes, In the above processing step, the uneven pattern is formed by plastically deforming the outer surface of the boss, and The above-mentioned uneven pattern includes a plurality of crests and a plurality of troughs arranged alternately to form a continuous waveform, and A method for manufacturing a pressure vessel in which the distance from a reference line parallel to the outer surface of the boss to at least some of the peaks of the plurality of peaks is defined differently.
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4. In paragraph 1, A method for manufacturing a pressure vessel in which the distance from a reference line parallel to the outer surface of the boss to the bottom portions of a plurality of the grooves is defined to be equal to each other.
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7. In paragraph 1, A method for manufacturing a pressure vessel in which the depth from the outer surface of the boss to the bottom of the valley is defined as 0.04 mm to 0.15 mm.
8. In paragraph 1, A method for manufacturing a pressure vessel in which, in the above processing step, the uneven pattern is formed by pressing the outer surface of the boss with a press-fit projection provided on the circumferential surface of the press-fit jig.
9. In paragraph 8, While the above-mentioned indentation protrusion presses against the outer surface of the boss, A method for manufacturing a pressure vessel in which at least one of the rolling movement of the press-fit jig along the outer surface of the boss and the rotation of the boss around the axis of the liner is performed.
10. In paragraph 1, A method for manufacturing a pressure vessel in which, in the above processing step, the uneven pattern is formed by projecting a shot ball onto the outer surface of the boss.
11. In Paragraph 10, While projecting the shot ball onto the outer surface of the boss, The above boss is a method for manufacturing a pressure vessel that rotates around the axis of the above liner.
12. In paragraph 1, The above boss is a method for manufacturing a pressure vessel formed from an aluminum alloy.
13. A liner having a metal boss at the end; A concave-convex pattern formed on the outer surface of the boss; and A reinforcing material wound on the outer surface of the liner to pass through the above uneven pattern; Includes, The above uneven pattern is formed by plastically deforming the outer surface of the boss, and The above-mentioned uneven pattern includes a plurality of crests and a plurality of troughs arranged alternately to form a continuous waveform, and A pressure vessel in which the distance from a reference line parallel to the outer surface of the boss to at least some of the peaks of the plurality of peaks is defined differently.
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16. In Paragraph 13, A pressure vessel in which the distance from a reference line parallel to the outer surface of the boss to the bottom portions of a plurality of the valleys is defined to be equal to each other.
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19. In Paragraph 13, A pressure vessel in which the depth from the outer surface of the boss to the bottom of the valley is defined as 0.04 mm to 0.15 mm.
20. In Paragraph 13, The above boss is a pressure vessel formed of aluminum alloy.

Description

Pressure Vessel and Manufacturing Method Thereof The present invention relates to a pressure vessel and a method for manufacturing the same, and more specifically, to a pressure vessel and a method for manufacturing the same that can improve quality and durability and reduce the defect rate. A hydrogen vehicle is configured to drive by generating its own electricity through a chemical reaction between hydrogen and oxygen and driving a motor. More specifically, the hydrogen vehicle includes a hydrogen tank ( H₂ Tank) in which hydrogen ( H₂ ) is stored, a fuel cell stack that generates electricity through a redox reaction between hydrogen and oxygen ( O₂ ), various devices for draining the generated water, a battery that stores the electricity produced by the fuel cell stack, a controller that converts and controls the generated electricity, and a motor that generates driving force. Meanwhile, a TYPE 4 pressure vessel may be used as a hydrogen tank for a hydrogen vehicle. A TYPE 4 pressure vessel includes a liner (e.g., made of a non-metallic material) and a carbon fiber layer formed by winding a carbon fiber composite material onto the outer surface of the liner. However, conventionally, when winding carbon fiber composite material onto the outer surface of a liner, slippage of the carbon fiber composite material occurs, making it difficult to accurately wind the carbon fiber composite material to the required orientation and position. In addition, if slippage occurs during the winding of the carbon fiber composite material, the winding process of the carbon fiber composite material must be stopped, the incorrectly wound part removed, and the carbon fiber composite material re-winded at a redesigned winding angle, which results in reduced manufacturing efficiency and increased manufacturing costs, and makes it difficult to ensure the quality and durability of the pressure vessel. Accordingly, various efforts have recently been made to improve the quality and durability of pressure vessels and reduce defect rates, but these are still insufficient, and further development is required. FIG. 1 is a block diagram illustrating a method for manufacturing a pressure vessel according to an embodiment of the present invention. FIG. 2 is a drawing for explaining a pressure vessel according to an embodiment of the present invention. Figure 3 is an enlarged view of section 'A' in Figure 2. FIG. 4 is a plan view illustrating an uneven pattern of a pressure vessel according to an embodiment of the present invention. FIGS. 5 and 6 are drawings for explaining other embodiments of an uneven pattern as a pressure vessel according to an embodiment of the present invention. FIGS. 7 and 8 are drawings for explaining another embodiment of an uneven pattern as a pressure vessel according to an embodiment of the present invention. FIGS. 9 and FIGS. 10 are drawings for explaining a process of processing an uneven pattern in a pressure vessel according to an embodiment of the present invention. FIGS. 11 and FIGS. 12 are drawings for explaining another embodiment of a process for processing an uneven pattern as a pressure vessel according to an embodiment of the present invention. FIG. 13 is a drawing showing the outer surface of a boss having an uneven pattern formed thereon, as a pressure vessel according to an embodiment of the present invention. FIG. 14 is a drawing for explaining the surface structure of a boss formed by cutting a rough pattern, as a pressure vessel according to an embodiment of the present invention. FIG. 15 is a drawing for explaining the surface tissue structure of a boss formed by press-fitting, which is a pressure vessel according to an embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted. In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology. Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or m