KR20170046887A - Deep drawing apparatus for forming pressure vessel head - Google Patents

Deep drawing apparatus for forming pressure vessel head Download PDF

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Publication number
KR20170046887A
KR20170046887A KR1020150147039A KR20150147039A KR20170046887A KR 20170046887 A KR20170046887 A KR 20170046887A KR 1020150147039 A KR1020150147039 A KR 1020150147039A KR 20150147039 A KR20150147039 A KR 20150147039A KR 20170046887 A KR20170046887 A KR 20170046887A
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KR
South Korea
Prior art keywords
female mold
blank
mold
head
pressure vessel
Prior art date
Application number
KR1020150147039A
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Korean (ko)
Other versions
KR101747681B1 (en
Inventor
이부길
이진환
Original Assignee
주식회사 금곡기공
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Priority to KR1020150147039A priority Critical patent/KR101747681B1/en
Publication of KR20170046887A publication Critical patent/KR20170046887A/en
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Publication of KR101747681B1 publication Critical patent/KR101747681B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The present invention relates to a molding apparatus for a pressure vessel head, which when manufacturing a hemispheric pressure vessel head, is able to prevent a molding process from being complex through bulging or creases on a blank; and to easily separate a completely molded head from a male mold. The molding apparatus of the present invention comprises: a male mold unit including a hemispheric male mold, and a supporter bonded on a flat surface of the male mold; a female mold unit including a female mold engaged with the male mold which is in a shape of a hemispheric shell; a cylinder-shaped support cylinder which comes in contact with an external circumference of an end unit of the female mold which accommodates the female mold; an extender formed along an external circumference of an end cross-section of the female mold; and a plurality of first rings formed on the external circumference of the extender at regular intervals; a plurality of fixers which have a second ring; and a combination pin which penetrates the first rings of the female mold unit and the second ring of the fixers. When the combination pin penetrates the first rings and the second ring and the fixers are combined with the female mold unit, the fixers reach the extender.

Description

[0001] The present invention relates to a forming apparatus for forming a head for a pressure vessel,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for forming a head of a pressure vessel, and more particularly, to a pressure vessel apparatus capable of preventing a molding process from being complicated due to occurrence of folds and wrinkles in a blank when a hemispherical pressure vessel head is manufactured. To a forming apparatus for a head for a head.

The pressure vessel used for storage, reaction, separation, etc. of a fluid having pressure is formed integrally with the head so as to withstand the pressure of the fluid injected into the pressure vessel.

Such an integral head is hot-formed by a deep drawing method, as shown in Fig. More specifically, after placing the circular blank 3 between the hemispherical male mold 1 and the cylindrical female mold 2 and pressing the blank while slowly moving the male mold to the female mold, In the shape of a hemispherical shell.

However, when the designed head is not a torispherical shell with a shallow depth but a deep hemispherical shell or the thickness of the blank is thin, when the blank is pressed with a male die, A phenomenon may occur. In order to prevent such a phenomenon from occurring, if the margin of the blank is increased, wrinkles are generated in the edge portion of the blank, so that it is troublesome to press the blank with the male die again after wrinkling the blank .

On the other hand, since the blank is pressurized by the male die in the state that the blank is heated, when the blank is separated from the male die after completion of molding, the head (blank after molding) is cooled and contracted to separate the head from the male die There is a problem that the operation is not easy.

KR 10-1528122 B1

It is an object of the present invention to solve the problems of the prior art as described above, and it is an object of the present invention to provide a pressure vessel head capable of preventing the formation of folds and wrinkles on the blank during the molding of the pressure vessel head, To a molding apparatus for a head for a pressure vessel which can be easily separated from a mold.

According to a preferred embodiment of the present invention for solving the above problems, there is provided a mold comprising: a male mold part comprising a hemispherical male mold and a support joined to a flat surface of the male mold; A cylindrical support cylinder which is in contact with the outer periphery of the distal end of the female mold and accommodates the female mold, an extension extending along the outer periphery of the end surface of the female mold, A plurality of first rings formed at equal intervals around an outer periphery of the base; A plurality of fixtures having a second loop; And a coupling pin passing through the first ring of the female mold part and the second ring of the fixing base, wherein when the coupling pin passes through the first and second rings and the fixing table is coupled to the female mold part, And is formed so as to extend to an extension of the pressure vessel.

According to another embodiment of the present invention, there is provided a molding apparatus for a head for a pressure vessel, characterized in that the fixing table is formed in an arc shape having the same radius as the extension bar.

According to another embodiment of the present invention, there is provided a molding apparatus for a head for a pressure vessel, characterized in that an opening hole is formed in a top portion of the female die.

According to another embodiment of the present invention, there is provided a molding apparatus for a head for a pressure vessel, characterized in that a plurality of ribs are formed at regular intervals along the outer circumference of the female mold.

The head molding apparatus for a pressure vessel according to the present invention can support the blank in which the female mold is formed in a hemispherical shell shape and is pressed by the male mold as a whole so that occurrence of creep in the blank during pressurization can be prevented, Can be quickly and easily performed.

Further, since there is no need to provide a large margin in the blank for prevention of folding, wrinkles can be prevented from occurring in the blank.

In addition, when the male mold is separated from the blank molded in a hemispherical shell shape, the male mold can be easily separated since the blank is fixed by the fixing table.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a method of manufacturing a conventional pressure vessel head. FIG.
2 is a perspective view of a head molding apparatus for a pressure vessel according to the present invention and a cross-sectional view of a part of its construction.
Fig. 3 is an explanatory diagram for explaining a process of forming a head using the above-described molding apparatus.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

The present invention relates to an apparatus used for molding a head of a pressure vessel, and it is possible to prevent the occurrence of folding and wrinkling on the blank during a molding operation, thereby saving time and effort required for the molding operation, (Head) can be easily separated from the mold.

2 (a) is a perspective view of the head molding apparatus 1 for a pressure vessel according to the present invention, and Fig. 2 (b) is a sectional view of the female die portion 20 of the molding apparatus .

The head forming apparatus 1 for a pressure vessel according to the present invention mainly comprises a male die portion 10, a female die portion 20, a holding table 30 and an engagement pin (not shown).

The male die portion 10 is joined to the press as a portion for pressing the disk-shaped blank 2 during the molding operation and moves in the vertical direction to press the blank 2. More specifically, the male die portion 10 is formed as a hemispherical shape and is a portion for directly pressing the blank 2 and a male die 11 joined to a flat surface of the male die 11, And a support table 12 for fixing the press plate 12 on the press. The curved surface portion of the male die 11 is formed in the same shape as the inner surface of the head, and is formed slightly larger than the inner surface of the head in consideration of shrinkage of the head due to cooling.

For reference, the blank 2 refers to a circular steel plate before forming, and is formed to be slightly larger than the area of the head.

The female mold section 20 is a part for supporting the blank 2 when the male mold section 10 presses the blank 2 and is provided with a hemispherical shell mold 21 engaging with the male mold 11, A cylindrical supporting cylinder 22 which is in contact with the outer periphery of the distal end of the female mold 21 to receive the female mold 21 and an extension 23 which is formed along the outer periphery of the end surface of the female mold 21, And a plurality of first rings (24) formed at equal intervals around the outer periphery of the extension base (23).

The female mold 21 directly supports the blank 2 pressed by the male die 11 and forms the outer surface of the head. 1, the outer surface of the male die 11 has the same shape as the inner surface of the head, but the female die 21 is simply formed into a cylindrical shape The blanks 2 pressed by the male molds 11 could not be supported entirely, and during the molding operation, the blank moved along the male molds to cause a creep around the center of the surface of the blank. However, since the female die 21 of the molding apparatus 1 according to the present invention is of hemispherical shape and can support the blank 2 as a whole, there is almost no possibility that the blank 2 is caused to be folded during the molding operation .

Accordingly, there is no need to provide a large margin in the blank in order to prevent the folding phenomenon as in the prior art, thereby reducing the occurrence of wrinkles at the edges of the blank and reducing the raw materials.

The support cylinder 22 serves to support the female mold 21 so that the female mold 21 formed in a hemispherical shell shape can be held in a fixed state without shaking.

The extension 23 supports the edge of the blank 2, which is formed slightly larger than the area of the head.

The fixing pin 30 has a plurality of second rings 31. The coupling pin (not shown) connects the first ring 24 of the female mold portion 20 and the second ring 31 of the fixing pin 30 So that the fixing table 30 is fixed to the female die portion 20. When the fixing table 30 is coupled to the female mold part 20, the fixing table 30 is formed to extend to the extension table 23.

Hereinafter, the operation of the fixing table 30 or the like in the process of forming the head for a pressure vessel using the molding apparatus according to the present invention will be described. Fig. 3 shows a molding process of the head using the molding apparatus 1. Fig.

The forming process of the head using the molding apparatus is carried out by placing the blank 2 in a heated state on the female mold portion 20 (Fig. 3A), operating the press to mold the male mold 11 in the blank The step of molding the blank 2 into the designed head shape by pressing the first ring 24 of the female die portion 20 and the step (FIG. 3 (b) 3 (c) of FIG. 3) and a step of moving the male die portion 10 to a position (FIG. 3 (a)) by inserting a coupling pin into the ring portion 31 to couple the fixing table 30 to the female die portion 20 (D) of FIG.

The blank 2 formed in the head shape has a shape that is completely engaged with the male die 11, and the blank 2 shrinks while being cooled, and adheres firmly to the male die 11. 3 (c), since the fixing table 30 coupled to the female mold portion 20 extends to the extension table 23, the circumference of the blank 2 supported by the extension table 23 The blank 2 can be easily separated from the male die portion 10 without moving along the male die portion 10 while being held by the holding table 30 even if the male die portion 10 is moved into place .

After separating the male mold part 10 from the blank 2, the fixing table 30 is removed from the female mold part 20, the blank 2 is taken out from the female mold part 20, The edge of the blank 2 is cut.

The fixing table 30 can be hung with a chain C or the like on the support table 12 as shown in FIG. 2 or the like so that the fixing table 30 can be connected to the female mold part 20 immediately, , The fixing table 30 can be prevented from interfering with the work during the operation of pressing the blank 2 by the male die 11 or the like.

The fixing table 30 may be formed in an arc shape having the same radius as the extension table 23.

In this case, when separating the male mold 11 from the hemispherical shell-shaped blank 2, one side of the fixing table 30 is entirely in contact with the edge of the blank 2, so that a local load is not applied. It is possible to reduce the possibility of deformation.

Alternatively, the fixing table 30 may be formed in a flat bar shape to fix only a part of the edge of the blank 2, thereby fixing the blank 2 to the fixing table 30 regardless of the standard of the blank 2.

An opening hole (H) may be formed at the top of the female die (21).

In the hemispherical shell mold 21, the top portion refers to the portion located farthest from the circular end surface of the female die 21.

The blank 2 which is pressed by the male die 11 to be formed into hemispherical shells is most deformed at its edge at the time of molding and is hardly deformed at the center thereof so that there is little need to support the center portion. The opening hole H is formed so as to be in contact with the center portion of the blank 2 to reduce the material used for manufacturing the female mold 21 without reducing the efficiency of supporting the blank 2 by the female mold 21. [ I can do it.

A plurality of ribs 25 may be formed at regular intervals along the outer circumference of the female die 21. [

The ribs 25 are formed in the female die 21 so that the pressing force of the male die 11 is transmitted to the female die 21 when the male die 11 presses the blank 2 so that the female die 21 is not deformed. ).

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And thus fall within the scope of the present invention.

1: Molding device for head for pressure vessel
10: Male die part 11: Male die
12: Support base 20: Female mold part
21: female mold 22: support cylinder
23: Extension base 24: 1st ring
25: rib 30:
31: Second ring
H: opening hole

Claims (4)

(10) comprising a hemispherical male mold (11) and a support base (12) joined to a flat surface of the male mold (11);
A cylindrical supporting cylinder 22 which is in contact with the outer periphery of the distal end of the female mold 21 and accommodates the female mold 21, A female mold portion 20 comprising an extension 23 formed along the outer periphery of the end surface of the mold 21 and a plurality of first rings 24 formed at equal intervals around the outer periphery of the extension 23, ;
A plurality of fixtures (30) having a second loop (31); And
And an engaging pin (not shown) penetrating through the first loop 24 of the female mold part 20 and the second loop 31 of the fixing block 30,
When the fixing pin 30 is coupled to the female mold portion 20 through the first and second rings 24 and 31 so that the fixing pin 30 is extended to the extension base 23 Is formed on the surface of the pressure vessel.
The method according to claim 1,
Wherein the fixing table (30) is formed in an arc shape having the same radius as that of the extension base (23).
The method according to claim 1,
And an opening hole (H) is formed in a top portion of the female mold (21).
The method according to claim 1,
Wherein a plurality of ribs (25) are formed at equal intervals along the outer periphery of the female mold (21).
KR1020150147039A 2015-10-22 2015-10-22 Deep drawing apparatus for forming pressure vessel head KR101747681B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150147039A KR101747681B1 (en) 2015-10-22 2015-10-22 Deep drawing apparatus for forming pressure vessel head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150147039A KR101747681B1 (en) 2015-10-22 2015-10-22 Deep drawing apparatus for forming pressure vessel head

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KR20170046887A true KR20170046887A (en) 2017-05-04
KR101747681B1 KR101747681B1 (en) 2017-06-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114700407A (en) * 2022-04-12 2022-07-05 河南航天液压气动技术有限公司 Forming method for drawing and extruding hemispherical parts
CN117282873A (en) * 2023-11-27 2023-12-26 河南神州精工制造股份有限公司 Laminated forming assembly of binding type set combined die and forming method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114700407A (en) * 2022-04-12 2022-07-05 河南航天液压气动技术有限公司 Forming method for drawing and extruding hemispherical parts
CN117282873A (en) * 2023-11-27 2023-12-26 河南神州精工制造股份有限公司 Laminated forming assembly of binding type set combined die and forming method thereof
CN117282873B (en) * 2023-11-27 2024-03-26 河南神州精工制造股份有限公司 Laminated forming assembly of binding type set combined die and forming method thereof

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KR101747681B1 (en) 2017-06-14

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