KR20020003688A - A method of forming for the candle typed metal filter - Google Patents

A method of forming for the candle typed metal filter Download PDF

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Publication number
KR20020003688A
KR20020003688A KR1020000035502A KR20000035502A KR20020003688A KR 20020003688 A KR20020003688 A KR 20020003688A KR 1020000035502 A KR1020000035502 A KR 1020000035502A KR 20000035502 A KR20000035502 A KR 20000035502A KR 20020003688 A KR20020003688 A KR 20020003688A
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South Korea
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filter
metal filter
forming
candle
welding
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KR1020000035502A
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Korean (ko)
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지경자
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지경자
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Priority to KR1020000035502A priority Critical patent/KR20020003688A/en
Publication of KR20020003688A publication Critical patent/KR20020003688A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Materials (AREA)

Abstract

PURPOSE: A method for forming a candle type metal filter is provided in which post-processing such as acid treatment is omitted since welding scale is not generated during welding, and which greatly improves properties and filtering performance of the metal filter by preventing structure changes or cracks at the bending part. CONSTITUTION: The method for forming a candle type metal filter comprises the processes of preheating a straight type metal filter(2); holding both sides of a point to be bended to holders(6) in which rubber packings(7) are installed; forming inverted 'L' character shaped bending parts at both sides of the filter(2) by slowly rotating only one side holder in a clockwise direction with air pressure; and welding the base metal of a point where the inverted 'L' character shaped bending parts are met each other under the vacuum conditions after forming the filter in a cylindrical shape, wherein a temperature of the preheating is 100 to 180 deg.C.

Description

캔들형 금속필터의 성형방법 {A method of forming for the candle typed metal filter}A method of forming for the candle typed metal filter

본 발명은 캔들필터(Caldle Filter) 제조에 사용되는 원통상 금속필터의 성형방법에 관한 것이다. 캔들필터는 스판덱스, 폴리아미드 등의 폴리머 중합이나 방사시 폴리머 내에 존재하는 이(異)물질을 필터링하는 목적으로 널리 사용되고 있다.The present invention relates to a method for forming a cylindrical metal filter used in the manufacture of a candle filter. Candle filters are widely used for the purpose of filtering foreign substances present in the polymer during polymer polymerization or spinning such as spandex and polyamide.

상기 캔들필터는 크게 필터지지대(1)와 필터지지대 외면을 감싸고 있는 원통상의 금속필터(부직포)로 구성된다. 필터지지대(1)로는 도 5와 같이 표면에 다수의 구멍이 형성되어 있는 원통상 금속판이 널리 사용되고 있으나, 3~8개 금속판들이 필터길이 방향으로 방사선 형태로 서로 접합되어 있는 구조의 필터지지대도 사용 될 수 있다. 원통상 금속필터(2)로는 금속섬유, 보다 구체적으로 스테인레스 강철 와이어가 서로 랜덤하게 엉켜있는 부직포 형태가 널리 사용된다.The candle filter is largely composed of a cylindrical metal filter (nonwoven fabric) surrounding the filter support 1 and the outer surface of the filter support. As the filter support 1, a cylindrical metal plate having a plurality of holes is formed on the surface as shown in FIG. 5, but a filter support having a structure in which 3 to 8 metal plates are joined to each other in the form of a radiation in the filter length direction is also used. Can be. As the cylindrical metal filter 2, a metal fiber, more specifically, a nonwoven fabric in which stainless steel wires are randomly entangled with each other is widely used.

캔들형(원통형) 금속필터(2)는 일자형 금속필터의 양말단부를 밴딩시킨 후, 이들을 둥글게 감은후 서로 접합되는 양말단부(밴딩부분)를 용접하여 제조한다.The candle-type (cylindrical) metal filter 2 is manufactured by bending the sock end of a straight metal filter, winding them roundly, and welding the sock end (banding part) joined together.

종래 캔들형 금속필터를 성형하는 방법으로는 먼저 도 3과 같이 일자형 금속필터를 요홈이 있는 받침대(8) 상에 올려놓고 이를 가압장치(9)로 눌러 밴딩하거나, 도 4와 같이 일자형 금속필터 일측을 홀더(6)에 고정한 후 나머지 일측을 가압장치(9)를 사용하여 수직방향으로 눌러 밴딩시킨 다음, 밴딩된 금속필터를 둥글게 감아 서로 접합되는 양말단부를 알곤 용접하는 방법이 널리 사용되어 왔다.As a method of forming a conventional candle-type metal filter, first, the linear metal filter is placed on the pedestal 8 having the recess as shown in FIG. 3 and pressed by the pressurizing device 9, or one side of the straight metal filter as shown in FIG. After fixing to the holder (6) by pressing the other side in the vertical direction using the pressure device (9) and then bending, and wound around the banded metal filter to be joined to each other, the method has been widely used.

이와 같은 종래의 방법으로 캔들형 금속필터를 성형하면, 밴딩점(굴곡점)에 수직방향으로 하중이 순간적으로 가해져 굴곡부분 주위의 조직이 변화되거나 굴곡부분 주위에 크랙(Crack)이 발생되어, 향후 사용시 금속필터의 물성 및 필터링 기능이 저하되는 문제가 있었다.When the candle-type metal filter is molded by such a conventional method, a load is momentarily applied to the bending point (bending point) in a vertical direction to change the structure around the bent portion or to generate cracks around the bent portion. In use, there was a problem that the physical properties and filtering function of the metal filter is reduced.

또한 종래에서 밴딩된 금속필터를 둥글게 감아 서로 마주보는 양말단부를 대기조건 하에서 용접하기 때문에 검은 용접자국(이하 "용접스케일"이라고 한다)이 발생된다. 그 결과 스케일 제거를 위한 산처리 등의 후공정이 필요하게 되어 공정이 복잡해질 뿐만 아니라, 산처리로 인해 금속필터가 부식되어 내구성 및 필터링 기능 등이 저하되는 문제가 있었다. 일반적으로 용접법을 녹이는 전류는 15A 수준이며 금속필터(부직포)를 녹이는 전류는 5A 수준이다.In addition, black welding marks (hereinafter, referred to as "welding scales") are generated because the sock ends facing each other are welded roundly by winding a banded metal filter. As a result, a post process such as an acid treatment for removing the scale is required, which not only complicates the process, but also causes the metal filter to be corroded due to the acid treatment, thereby degrading durability and filtering function. In general, the current to melt the welding method is 15A and the current to melt the metal filter (non-woven fabric) is 5A.

본 발명의 목적은 이와 같은 종래 성형방법의 문제점들을 해결하므로서, 금속필터(부직포)의 물성이나 필터링 기능을 저하시키지 않으며 용접스케일도 발생되지 않아 산처리 등의 후공정을 간소화 할 수 있는 캔들형 금속필터의 성형방법을 제공하기 위한 것이다.The object of the present invention is to solve the problems of the conventional molding method, such as not deteriorating the physical properties or filtering function of the metal filter (non-woven fabric), and does not generate a welding scale, candle-type metal that can simplify the post-process such as acid treatment It is to provide a method for forming a filter.

본 발명은 캔들형(원통형) 금속필터를 용접스케일이 발생되지 않아 공정이 간소화 되며, 필터의 물성 및 여과기능의 저하가 없도록 성형 할 수 있는 방법을 제공하고자 한다.The present invention is to provide a method that can be molded so that the candle-type (cylindrical) metal filter does not generate a welding scale is simplified, so that the physical properties and filtration of the filter is not deteriorated.

도 1 (a)는 본 발명 금속필터의 용접전 상태를 나타내는 평면도 이다.1 (a) is a plan view showing a state before welding of the metal filter of the present invention.

도 1 (b)는 본 발명 금속필터의 용접후 상태를 나타내는 평면도 이다.Figure 1 (b) is a plan view showing a post-weld state of the metal filter of the present invention.

도 2는 본 발명의 밴딩공정을 나타내는 개략도 이다.2 is a schematic view showing a bending process of the present invention.

도 3 및 도 4는 종래 밴딩공정을 나타내는 개략도 이다.3 and 4 is a schematic diagram showing a conventional bending process.

도 5는 캔들필터의 길이방향 단면도 이다.5 is a longitudinal cross-sectional view of the candle filter.

도 6은 도 5의 A-A'부분 절개 단면도 이다.6 is a cross-sectional view taken along the line AA ′ of FIG. 5.

※ 도면 중 주요부분에 대한 부호설명※ Explanation of code of main part of drawing

1 : 필터지지대 2 : 캔들형 금속필터1: filter support 2: candle type metal filter

2a : 금속필터의 굴곡부분이 서로 만나는 지점 3 : 다공2a: The point where the bent portions of the metal filter meet each other 3: Porous

4,5 : 고정수단 6 : 홀더 7 : 홀더내 고무패킹4,5 fixing means 6 holder 7 rubber packing in holder

8 : 받침대 9 : 가압장치8: base 9: pressurizing device

이와 같은 과제를 달성하기 위한 본 발명의 캔들형 금속필터의 성형방법은일자형 금속필터(2)를 예열하고, 밴딩시키고자 하는 지점의 양측을 고무패킹(7)이 내장된 홀더(6)에 파지한 후, 공기압으로 한쪽 홀더만을 시계방향으로 서서히 회전시켜 ㄱ자형 굴곡부분을 필터(2) 양측에 형성한 다음, 상기 필터를 원통상으로 성형하여 ㄱ자형 굴곡부분이 서로 만나는 지점(2a)을 진공상태에서 모재(母材)용접하는 것을 특징으로 한다.According to the method of forming a candle-type metal filter of the present invention for achieving the above object, both sides of a spot to be preheated and bent in the straight metal filter 2 are gripped in a holder 6 having a rubber packing 7 embedded therein. Afterwards, only one holder is gradually rotated clockwise by air pressure to form an L-shaped bent portion on both sides of the filter 2, and then the filter is formed in a cylindrical shape to vacuum the point 2a where the A-shaped bent portions meet each other. It is characterized by welding the base metal in a state.

이하 본 발명을 도면들을 통하여 상세하게 설명한다.Hereinafter, the present invention will be described in detail with reference to the drawings.

먼저 본 발명은 일자형 금속필터(2)를 밴딩시키기 위하여 예열한다. 예열온도는 100~180℃가 바람직 하다. 예열온도가 너무 낮으면 밴딩시 필터의 조직변화나 크랙이 발생될 우려가 있고, 예열온도가 너무 높으면 에너지 낭비가 많아 진다.First, the present invention is preheated to band the straight metal filter (2). Preheating temperature is preferably 100 ~ 180 ℃. If the preheating temperature is too low, there may be a change in the structure of the filter or cracking when bending, and if the preheating temperature is too high, energy waste is increased.

다음으로는 밴딩시키고자 하는 지점을 기준으로 예열된 금속필터(2)의 양측을 고무패킹(7)이 내장된 홀더(6)에 각각 파지 시킨다. 이때 고무패킹(7)은 밴딩시 금속필터에 무리한 하중이 직접 전달되는 것을 방지할 목적으로 사용한다.Next, both sides of the preheated metal filter 2 are gripped by the holder 6 in which the rubber packing 7 is built, based on the point to be banded. At this time, the rubber packing 7 is used for the purpose of preventing the excessive load is directly transmitted to the metal filter when bending.

계속해서 한쪽 홀더를 공기압을 이용하여 시계방향으로 서서히 회전시켜 금속필터(2)를 ㄱ자형으로 밴딩시킨다. 일자형 금속필터(2)의 양측을 이와 같이 밴딩처리 하여,양측에 각각 ㄱ자형 굴곡부분을 형성한다. 본 발명은 밴딩시 가압을 수직운동 방향이 아닌 회전운동 방향으로 가하고, 금속필터를 미리 예열시키므로서 밴딩(굴곡)지점에 크랙(균열)이 발생하거나 조직이 변하는 것을 효과적으로 예방 할 수 있다.Subsequently, the one holder is slowly rotated clockwise using air pressure to bend the metal filter 2 to the "A" shape. Both sides of the straight metal filter 2 are bent in this manner to form a bent portion on each side. According to the present invention, the pressure is applied in the rotational direction instead of the vertical direction, and the metal filter is preheated in advance to effectively prevent cracking or cracking at the bending point.

다음으로는 양측에 각각 ㄱ자형 굴곡부분이 형성되어 있는 일자형금속필터(2)를 원통(캔들) 형태로 감아 상기 금속필터(2)의 양말단부(2a)들이 서로 마주보도록 하고, 이들 부분을 진공상태 하에서 모재용접 한다.Next, the straight metal filter 2 having the L-shaped bent portions formed on both sides is wound in a cylindrical form, and the sock end portions 2a of the metal filter 2 face each other, and these portions are vacuumed. Weld base material under state.

본 발명은 모재(母材)용접을 하기 때문에 별도의 용접봉을 사용하지 않는다. 그 결과 금속필터의 노화등을 방지 할 수 있고 혼용성도 매우 우수하다. 특히 본 발명은 N2가스 등을 사용하여 용접을 진공상태에서 실시함을 특징으로 한다.The present invention does not use a separate electrode because of the base metal welding. As a result, the aging of the metal filter can be prevented and the compatibility is very excellent. In particular, the present invention is characterized in that welding is performed in a vacuum state using N 2 gas or the like.

진공용접은 진공실내에서 용접을 실시할 수도 있고, 용접기의 선단부(용접되는 부분) 쪽에 N2가스 등이 주입되는 소형의 진공박스를 설치하여 실시 할 수도 있다. 그 결과, 용접후 스케일이나 탄화 미립자가 발생되지 않아, 이의 제거를 위한 약품처리 공정을 생략 할 수 있고, 약품처리로 인한 금속필터의 부식 등도 방지 할 수 있다.Vacuum welding may be performed in a vacuum chamber, or may be performed by installing a small vacuum box into which N 2 gas or the like is injected at the tip end (welded portion) of the welder. As a result, scales or carbonized fine particles are not generated after welding, so that a chemical treatment step for removing them can be omitted, and corrosion of a metal filter due to chemical treatment can be prevented.

본 발명은 용접시 용접스케일이 발생되지 않아 용접스케일 제거를 위한 산처리 등의 후공정을 생략 할 수 있다. 그 결과 성형공정이 간소화 되며, 산처리로 인한 금속필터의 노화, 부식 등을 방지 할 수 있어서 필터기능이 향상된다. 또한 본 발명은 밴딩부분에서의 조직변화나 크랙발생을 방지 할 수 있어서 금속필터의 물성 및 필터링 기능을 크게 개선 할 수 있다.In the present invention, the welding scale is not generated during welding, so that a post process such as an acid treatment for removing the welding scale may be omitted. As a result, the molding process is simplified, and the filter function is improved by preventing the aging and corrosion of the metal filter due to acid treatment. In addition, the present invention can prevent the structure change or cracking in the bending portion can greatly improve the physical properties and filtering function of the metal filter.

Claims (2)

일자형 금속필터(2)를 예열하고, 밴딩시키고자 하는 지점의 양측을 고무패킹(7)이 내장된 홀더(6)에 파지한 후, 공기압으로 한쪽 홀더만을 시계방향으로 서서히 회전시켜 ㄱ자형 굴곡부분을 필터(2) 양측에 형성한 다음, 상기 필터를 원통상으로 성형하여 ㄱ자형 굴곡부분이 서로 만나는 지점(2a)을 진공상태에서 모재 용접하는 것을 특징으로 하는 캔들형 금속필터의 성형방법.After preheating the straight metal filter (2) and holding both sides of the point to be banded in the holder (6) with the rubber packing (7), only one holder is gradually rotated clockwise by air pressure to form a bent portion. Is formed on both sides of the filter (2), and then the filter is formed in a cylindrical shape to weld the base metal in a vacuum state at a point where the bend portions meet each other (2a). 1항에 있어서, 예열온도가 100~180℃인 것을 특징으로 하는 캔들형 금속필터의 성형방법.The method of forming a candle-type metal filter according to claim 1, wherein the preheating temperature is 100 to 180 ° C.
KR1020000035502A 2000-06-27 2000-06-27 A method of forming for the candle typed metal filter KR20020003688A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100938503B1 (en) * 2007-11-13 2010-01-25 한국에너지기술연구원 Extrusion die for single-ended type ceramic candle filter and manufacturing method of ceramic filter using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940016131A (en) * 1992-12-03 1994-07-22 이종수 Optical disc player capable of automatic selection of disc jukebox type and automatic selection method
US5500029A (en) * 1994-04-25 1996-03-19 Industrial Filter & Pump Mfg. Co. Filter element and method of manufacture
KR100302956B1 (en) * 1998-07-21 2001-11-22 오염철 Pleated metal mesh filter joining technology for manufacturing process such as chemical fiber, oil refinery, nuclear power plant.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940016131A (en) * 1992-12-03 1994-07-22 이종수 Optical disc player capable of automatic selection of disc jukebox type and automatic selection method
US5500029A (en) * 1994-04-25 1996-03-19 Industrial Filter & Pump Mfg. Co. Filter element and method of manufacture
KR100302956B1 (en) * 1998-07-21 2001-11-22 오염철 Pleated metal mesh filter joining technology for manufacturing process such as chemical fiber, oil refinery, nuclear power plant.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100938503B1 (en) * 2007-11-13 2010-01-25 한국에너지기술연구원 Extrusion die for single-ended type ceramic candle filter and manufacturing method of ceramic filter using the same

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