KR940010526B1 - Expanding forming mehtod of tube and apparatus - Google Patents

Expanding forming mehtod of tube and apparatus Download PDF

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Publication number
KR940010526B1
KR940010526B1 KR1019920008000A KR920008000A KR940010526B1 KR 940010526 B1 KR940010526 B1 KR 940010526B1 KR 1019920008000 A KR1019920008000 A KR 1019920008000A KR 920008000 A KR920008000 A KR 920008000A KR 940010526 B1 KR940010526 B1 KR 940010526B1
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South Korea
Prior art keywords
tube
pipe
molding
expansion
expand
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KR1019920008000A
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Korean (ko)
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KR930023082A (en
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전정수
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전정수
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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The metallic pipe or tube such as stainless steel pipe or copper pipe is partially inflation-molded and cut at the middle part or at the two ends of the inflated pipe for the use of handrail-supporting pipe for construction or several chemical containers. The molding apparatus is actuated by hydraulic cylinders (40,50) having movable pistons (41,52) at the center, and the oil pressure fed to inner part of pipe expands the pipe wall to the groove(31) of outer molds for compress shaping.

Description

관의 팽창 성형방법 및 그 장치Expansion molding method of pipe and its apparatus

제 1 도는 본 발명의 성형방법에 따른 장치의 예시사시도.1 is an illustrative perspective view of an apparatus according to the molding method of the present invention.

제 2 도는 본 발명의 일예시 장치인 제 1 도의 요부를 발췌한 확대도.Figure 2 is an enlarged view of the main portion of Figure 1 which is an exemplary device of the present invention.

제 3 도는 본 발명의 팽창성형과정을 나타낸 예시도.3 is an exemplary view showing an expansion molding process of the present invention.

제 4 도는 본 발명의 장치에 사용되는 금형의 예시사시도.4 is an illustrative perspective view of a mold used in the apparatus of the present invention.

제 5 도는 본 발명에 의해 국부적으로 중앙부분이 팽창성형된 관의 예시도.5 is an illustration of a tube in which the central portion is expanded in accordance with the present invention.

제 6 도는 본 발명의 일요부인 진퇴피스톤의 단부를 발췌한 확대 단면도.6 is an enlarged cross-sectional view of an end portion of the Jinpi piston, which is an essential part of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 장치본체 11 : 승강실린더10: device body 11: lifting cylinder

20,30 : 금형 21,31 : 확장부20,30: mold 21,31: extension part

40,50 : 실리더 41,51 : 진퇴피스톤40,50: cylinder 41,51: retreat piston

43,53 : O-링 44,45 : 유압공43,53: O-ring 44,45: Hydraulic man

본 발명은 스텐렌스관이나 동관등의 각종 금속재 관(pipe) 또는 튜우브(Tube)(이하 "관"이라 통칭함)의 국부적인 부분을 관의 원래 직경보다 크게끔 확장팽창하도록 하는 관의 팽창성형방법 및 그에 다른 팽창성형장치에 관한것이다.The present invention expands a tube to expand and expand a local portion of various metal pipes or tubes (hereinafter, referred to as "tubes") such as stainless steel tubes or copper tubes to be larger than the original diameter of the tube. A molding method and other inflation molding apparatus.

본 발명의 팽창성형방법은 특히, 일정길이를 갖는 관의 국부적인 부분을 확장되도록 팽창성형한 후, 상기 팽창성형부의 중간부 또는 양단부를 절단하여 이를 건축용의 난간지주봉이나 각종 화학용기등으로 제조하여 사용하는데 유용한 것으로, 팽창성형하고자 하는 관의 직경보다 약간 큰 직경 즉, 확장시키고자 하는 지경을 갖는 상, 하부금형을 구비한 성형장치와 유압 또는 공압, 수압 등의 압력(이하 본 발명에서는 "유압"으로 통칭함)을 공급 또는 제거하는 유압공급장치를 이용하여 간편하고 신속한 작동에 의해 관의 직경과 두께에 관계없이 일정길이를 갖는 관의 요구되는 국부적인 부분을 확장되게끔 팽창성형함은 물론, 상기 성형부분이 내외측 표면부의 정밀도와 외관상의 미려함이 증대되는 것이다.In particular, the expansion molding method of the present invention, after the expansion molded to expand the local portion of the tube having a certain length, and cut the middle or both ends of the expansion molded part is produced by handrail rods or various chemical containers for construction It is useful for use in the present invention, which is slightly larger than the diameter of the tube to be expanded, that is, a molding apparatus having upper and lower molds having a diameter to be expanded, and pressures such as hydraulic pressure, pneumatic pressure and hydraulic pressure (hereinafter, " Expansion to expand the required local part of the tube to a certain length, regardless of the diameter and thickness of the tube, by means of a simple and quick operation using a hydraulic supply to supply or remove the hydraulic pressure. Of course, the molded part is to increase the precision and appearance beauty of the inner and outer surface portion.

따라서, 최근에는 각종산업의 발달에 따른 요구로 관의 중간부 즉, 국부적인 부분을 확장팽창시키기 위한 방법과 장치들이 안출되고 있으나 그 대부분은 유체공학적인 방법 및 장치를 응용하여 실시하였기 때문에 복잡한 방법과 장치를 필요로 하였던 것이다.Therefore, in recent years, methods and devices for expanding and expanding the middle part of the tube, that is, the local part, have been devised due to the demands of various industries. However, most of them have been developed by applying fluid engineering methods and devices. And needed a device.

특히 국내특허 공고 90-4736호와 같은 "튜우브 팽창장치와 공정"의 발명은 원통형 강 맨드럴의 선단부에 요설된 토릭시일이 감착되는 환령홈의 위치에 제한되어져 있어 팽창 성형코져하는 크기에 따라 원통형 강맨드럴도 교환 사용해야 하는 불편과 경제적 부담이 매우 컸던 것이다.In particular, the invention of the "tub expansion device and process" such as the domestic patent publication 90-4736 is limited to the position of the annular recess in which the toric seal, which is provided at the distal end of the cylindrical steel mandrel, is restricted. Cylindrical steel mandrel also had a great deal of inconvenience and economic burden.

본 발명은 상기와 같은 제반 결점들을 해소하고져 간단한 구조와 간편하고 신속한 작동을 하는 성형장치를 사용하여 일정길이를 갖는 관의 국부적인 부분을 요구하는 직경 및 길이로 확장되게끔 팽창성형하는 관의 팽창성형방법과 그에 따른 장치를 제공하고져 함을 발명의 목적으로 하는 것으로, 이를 첨부된 예시도면에 따라 상세히 설명하면 다음과 같다.The present invention solves the above-mentioned shortcomings and expands a tube that is expanded to a diameter and length that requires a local portion of a tube having a certain length by using a molding apparatus that has a simple structure and simple and quick operation. It is an object of the present invention to provide a molding method and apparatus according to the present invention, which will be described in detail according to the accompanying drawings.

본 발명은 첨부도면 제 1 도에 예시된 바와같은 팽창성형장치를 이용하여 일정길이의 관을 고정설치한 후, 관의 양단부로 부터 유압을 공급하므로서, 성형장치의 상, 하금형의 내측에 위치하는 팽창성형시키고자 하는 관의 직경확장 부분을 유압으로 확장시켜 주는 것이다.The present invention is fixed to the pipe of a certain length by using the expansion molding device as illustrated in Figure 1 attached to the position, by supplying the hydraulic pressure from both ends of the tube, located inside the upper and lower molds of the molding apparatus It is to expand the diameter portion of the tube to be expanded by hydraulic.

즉, 일정길이를 갖는 관(60)의 국부적인 부분을 팽창성형시킬 수 있는 상, 하부금형(20)(30)을 중앙부에 설치하고, 양측부에는 유압에 의해 진퇴작동하는 실린더(40)(50)를 각각 설치하였으며, 상기 실린더(40)(50)의 단부에는 중앙부의 상, 하부금형(20)(30)쪽으로 진퇴작동하는 진퇴피스톤(41)(51)을 설치한 성형장치(10)이다.That is, the upper and lower molds 20 and 30, which are capable of inflating a localized portion of the tube 60 having a predetermined length, are installed in the center portion, and the cylinders 40 which move forward and backward by hydraulic pressure on both sides ( 50, respectively, and the molding apparatus 10 provided with the retreat pistons 41 and 51 for advancing and retracting toward the upper and lower molds 20 and 30 at the centers of the cylinders 40 and 50, respectively. to be.

상기와 같은 성형장치(10)를 사용하여 관(60)의 국부적인 부분을 확장되도록 팽창성형하되, 성형가공할 일정길이의 관(60)을 성형장치(10)의 하부금형(30)상에 재치하여 팽창성형할 성형부(60)가 상기 하부금형(30)의 확장부(31)에 위치하도록 한 후, 상부금형(20)을 승강 실린더(11)에 의해 하강시켜 하부금형(30)과 결합고정시키고, 성형장치(10)의 양측부에 설치된 실린더(40)(50)를 작동시켜 진퇴피스톤(41)(51)이 상기 관(60)의 양단부를 통하여 내부로 삽입되어 관(60)의 팽창성형부(61)에 위치하도록 한 후, 상기 진퇴피스톤(41)(51)을 통하여 관(60)의 내부에 유압을 공급하므로서 관(60)의 내부로 공급되는 유압이 관(60)의 성형부(61)를 상, 하부 금형(20)(30)의 확장부(21)(31)의 내주면에 압착되도록 압력을 가하면서 확장 팽창시키게 되는 것이다.Expanding molding to expand the local portion of the tube 60 using the molding device 10 as described above, the tube 60 of a predetermined length to be molded on the lower mold 30 of the molding device 10 After placing the molded part 60 to be expanded and positioned in the expansion part 31 of the lower mold 30, the upper mold 20 is lowered by the elevating cylinder 11 to lower and lower the mold 30. Coupling and fixing, by operating the cylinder 40, 50 installed on both sides of the molding apparatus 10, the retreat piston (41, 51) is inserted into the inner tube through both ends of the tube 60 to the tube 60 The hydraulic pressure supplied to the interior of the tube 60 is supplied to the interior of the tube 60 by supplying hydraulic pressure to the interior of the tube 60 through the forward and backward pistons 41 and 51. The molded part 61 is expanded and expanded while applying pressure to compress the inner and outer peripheral surfaces of the expanded parts 21 and 31 of the upper and lower molds 20 and 30.

이때, 진퇴피스톤(41)(51)의 내부에 관통되어져 접동진퇴케된 내측관(44)(54)의 선단에 형성된 요홈조(42)(52)에 삽입설치된 O-링(43)(53)은 내측관(44)(54)이 외측으로 이동되어지므로서 외측으로 팽창되어져 관(60)의 내주벽에 밀착되어 성형부(61)의 양측단부를 긴밀하게 밀폐시켜 주므로서 관(60)의 팽창성형부(61)의 성형된 표면부가 손상됨을 방지하여 주는 것이다.At this time, the O-rings 43 and 53 inserted into the grooves 42 and 52 formed at the distal end of the inner pipes 44 and 54 which are penetrated and penetrated into the retreat pistons 41 and 51. The inner tube (44) (54) is expanded to the outside as it is moved outwards and in close contact with the inner circumferential wall of the tube (60) to close the both ends of the forming portion 61 to close the tube (60) It is to prevent the molded surface portion of the expanded molded portion 61 of the damage.

첨부도면중 미설명 부호 22, 32는 상, 하부금형(20)(30)의 결합돌기 및 요홈, 45, 55는 유압공급용 호스를 각각 나타낸다.In the accompanying drawings, reference numerals 22 and 32 denote coupling protrusions and grooves of the upper and lower molds 20 and 30, and 45 and 55 denote hydraulic hoses, respectively.

이와같이 본 발명의 팽창성형방법에 의하여 간단한 성형장치의 유압을 이용하여 관의 필요한 팽창성형부분을 간편하고 신속하게 팽창성형할 수 있을뿐만 아니라, 정밀하게 팽창성형된 내외표면부가 매끄럽고 외관상의 미려함이 뛰어난 것이다.Thus, the expansion molding method of the present invention not only can easily and quickly expand the required expansion molded portion of the pipe by using the hydraulic pressure of the simple molding apparatus, but also has excellent smoothness and appearance beauty in the precisely expanded molded inner and outer surfaces. will be.

본 발명은 성형장치의 상, 하부금형을 다양한 형태로 성형하여 교체하여 주므로서 관의 팽창성형부의 외관을 다양한 형태로 확장팽창하여 성형가공할 수 잇는 것으로, 각종 금속관의 어느 위치를 국부적으로 확장시키는데도 유용하게 적용될 수 있는 것이며, 또한 간단한 장치와 간편신속한 작업으로 팽창성형할 수 있으므로 매우 경제적이고 실용적인 효과를 얻을 수 있는 것이다.The present invention is to expand and expand the appearance of the expanded molded part of the tube in various forms by forming and replacing the upper and lower molds of the molding apparatus in various forms, to locally expand any position of various metal tubes In addition, it can be usefully applied, and can also be expanded to a simple device and simple quick operation, so that a very economical and practical effect can be obtained.

Claims (2)

성형부(61)을 성형장치(10)의 상, 하부금형(20)(30) 사이에 위치시켜 일정길이를 갖는 관의 국부적인 부분을 확장시켜 팽창성형함에 있어서, 관(60)의 양단부에서 성형부(61)에 실린더(40)(50)에 의해 진퇴하는 진퇴피스톤(41)(52)을 삽입설치하고, 유압을 공급하여 관(60)의 내부로 공급되는 유압이 성형부(61)의 주벽을 외측으로 팽창시켜 상, 하부금형(20)(30)의 확장부(21)(41)의 내주면에 압착되도록 하므로 관의 국부적인 부분을 요구하는 직경으로 확장시켜 팽창성형함을 특징으로 하는 관의 팽창성형방법.Positioning the molding portion 61 between the upper and lower molds 20, 30 of the molding apparatus 10 to expand the local portion of the tube having a predetermined length to expand the molding, at both ends of the tube 60 Insertion and installation of the retreat pistons 41 and 52 advancing and retracted by the cylinders 40 and 50 in the molding section 61, the hydraulic pressure supplied to the interior of the pipe 60 is supplied to the molding section 61 Since the main wall of the expansion to the outside to compress the inner peripheral surface of the expansion portion 21, 41 of the upper and lower molds 20, 30, and expands the local part of the tube to the required diameter to expand the molding Method of expansion molding of the tube. 확장부(21)(31)를 갖는 상, 하부금형(20)(30)을 중앙부에 설치하고 상기 상부금형(20)을 승강실린더(11)로 작동하여 일정길이를 갖는 관(60)의 국부적인 부분을 팽창성형함에 있어서, 양측부에는 유압에 의해 작동하는 진퇴피스톤(41)(51)을 갖는 실린더(40)(50)를 설치하였으며, 상기 진퇴피스톤(41)(51)의 내부에 관통되어져 접동진퇴케된 내측관(44)(54)의 선단에 요홈조(42)(52)를 설하여 O-링(43)(53)을 삽입설치하여서 구성됨을 특징으로 하는 관의 팽창성형장치.The upper and lower molds 20 and 30 having expansion parts 21 and 31 are installed in the center, and the upper mold 20 is operated by the elevating cylinder 11 to locally the pipe 60 having a certain length. In inflating the phosphorus portion, cylinders 40 and 50 having forward and backward pistons 41 and 51 which are operated by hydraulic pressure are installed at both sides, and penetrate inside the forward and backward pistons 41 and 51. Pipe forming apparatus characterized in that it is configured by inserting the O-rings (43) and (53) by installing grooves (42) and (52) at the tip of the inner tube (44) (54), which is pushed forward and backward. .
KR1019920008000A 1992-05-12 1992-05-12 Expanding forming mehtod of tube and apparatus KR940010526B1 (en)

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