KR100219003B1 - 마찰이동용접방법 및 마찰이동 용접용 프로브 - Google Patents

마찰이동용접방법 및 마찰이동 용접용 프로브 Download PDF

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KR100219003B1
KR100219003B1 KR1019960704767A KR19960704767A KR100219003B1 KR 100219003 B1 KR100219003 B1 KR 100219003B1 KR 1019960704767 A KR1019960704767 A KR 1019960704767A KR 19960704767 A KR19960704767 A KR 19960704767A KR 100219003 B1 KR100219003 B1 KR 100219003B1
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welding
probe
members
plasticized
assembled
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오르 테르제 미드링
에드워드 제임스 모레이
앤더스 산드비크
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더 웰딩 인스티튜트
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Priority claimed from NO941144A external-priority patent/NO941144D0/no
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0681—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding created by a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/434—Joining substantially flat articles for forming corner connections, fork connections or cross connections
    • B29C66/4342—Joining substantially flat articles for forming corner connections, e.g. for making V-shaped pieces
    • B29C66/43421—Joining substantially flat articles for forming corner connections, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/434—Joining substantially flat articles for forming corner connections, fork connections or cross connections
    • B29C66/4344—Joining substantially flat articles for forming fork connections, e.g. for making Y-shaped pieces
    • B29C66/43441—Joining substantially flat articles for forming fork connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces, H-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81264—Mechanical properties, e.g. hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

본 발명에 따른 마찰이동 용접방법은 서로를 향해 조립된 부재를 꽉 붙여 부착하는 단계와, 조립된 부재의 재질보다 견고한 물질로 된 프로브에 의해 상기 조립된 부재를 서로 붙은 결합선을 따라 마찰열을 발생시키는 회전운동 조건하에 두어 인접부재에 가소화된 영역을 생성시키는 단계, 상기 생성된 가소화된 부재에 부재의 표면을 따라 수직압력을 가함으로써, 또 상기 가소화된 부재를 프로브 뒤에서 경화되도록 하면서 프로브 핀의 이동에 따라 가소화된 재질을 수직압력과 동시에 측면으로 수직한 방향으로 흐르게 함으로써, 상기 인접하여 조립된 부재의 길이방향에 대해 측면으로 수직한 방향 및 수직면에서 수직한 방향으로 가소화된 부재를 확장해서 흘려 확보한 용접선을 균일화시키는 단계를 포함하여 이루어진다'

Description

[발명의 명칭]
마찰이동용접방법 및 마찰이동 용접용 프로브
[발명의 상세한 설명]
[기술분야]
본 발명은 (금속)부재들을 결합하는 마찰용접방법에 관한 것으로, 특히 단단한 물질의 프로브(probe)와 결합될 부재간의 상대마찰운동에 근거한 마찰이동용접으로 불리는 방법에 관한 것이다. 또한 본 발명은 마찰용접(friction welding)에 사용되는 개선된 공구에 대해서도 기술한다.
[배경기술]
서로 걸합될 물체의 "마찰"의 원리를 근간으로 하여 충분한 양의 열을 발생시켜 인접표면들에 가소화된 상태(plasticized condition)를 생성하는 마찰용접은 수십년간 사용되어져 왔는데, 마찰열은 2개의 결합될 부품에 의해서만 생성된다. 그러나 형성된 용접선(welding seam)에는 용접공정에서 발생하는 많은 결함이 발생하는데, 이러한 마찰용접의 활용성을 상당히 제한하는 주결함은 용접될 부재의 적어도 하나가 축대칭이어야 한다는 것이다. 따라서 상기한 공정은 예건대 종방향 연속용접을 필요로 하는 구조물에는 활용할 수 없었다.
상기한 소위 마찰이동용접을 개선한 것으로, WO93/10935호가 있는데, 처리 물품보다 단단한 물질의 프로브(제 3체)가 용접공정에서 사용되는데, 이러한 마찰이동용접은 상기 프로브와 작업부재 사이에 상대적이고 주기적인 운동을 근간으로 하여, 프로브와 작업부재 사이에 생성된 마찰열로 인해 작업부재내에 가소화된 지역을 생성하도록 하는 한편, 상대적인 주기운동을 멈추게 하여 가소화된 물질이 경화되게 한다. 결합되어질 작업부재들 사이에는 상대적인 운동으로 인한 열이 생성되지 않게 된다. 이러한 방법은 상이한 작업부재(플라스틱, 금속), 사용처(균열의 수선, 밀봉, 결합) 및 사용된 프로브의 형태에 따른 몇몇 실시예에 의해 기술되어 있다.
정밀한 부위에서 돌출된 형상물을 구조물안으로 결합하는 데 상기한 방법이나 장치가 사용될 때에는 빈틈없이 완전한 용접과 구조부재의 적절한 금속용접에 대한 요구를 만족시킬 수 없었으며, 랩형상(lap configuration)의 용접을 제공할 수도 없었다.
용접금속의 적절한 결합을 위해서는 프로브 바닥부가 전체의 용접공정(전방이동)중에 결합된 부재들의 표면과 긴밀한 접촉상태를 유지해야 한다. 상기한 프로브 바닥부가 전방이동중에 일시적으로라도 표면으로부터 "들려"진다면 적은 양의 가소화된 용접물질이 프로브 뒤에서 방출되어져 빈 공간이 생기고 이 공간을 채우는데 사용할 수 있는 물질이 없으므로, 용접에 빈틈이 존재하게 된다.
더욱이 종래에 사용하던 "부드러운" 용접프로브도 다른 결함을 가지고 있는데, 용접부재에 충분한 마찰열(프로브와 결합된 부재들 사이의 접촉시간)을 얻고 가소화된 용접물질의 충분한 흐름을 보장하기 위해 낮은 용접속도가 요구되었다.
그러므로 본 발명의 목적은 매끄러운 용접표면을 가지면서 빈틈이 없는 용접을 제공하는 마찰이동용접 방법을 제공하기 위한 것이다.
또한 본 발명의 다른 목적은 랩용접(lap welding)과 3 요소 이상의 결합형상을 제공하는 기존의 마찰이동 밑동용접(butt welding)을 향상시키기 위한 것이다.
본 발명의 또 다른 목적은 열영향부(HLAZ)가 감소된 균일한 용접선을 갖는 새로운 형태의 프로브를 제공하기 위한 것이다.
본 발명에 따른 목적들은 특허청구범위 제1항 내지 제8항에 기재된 바와 같은 마찰이동용접방법과 장치(프로브)를 사용함으로써 달성될 수 있다.
[도면의 간단한 설명]
제1도는 본 발명에 사용되는 용접장치/공정의 개략사시도.
제2도는 2 요소 프로브의 형태를 도시하는 확대부분단면도.
제3도는 3은 마찰이동용접의 기본 특성을 도시하는 개략도.
제4도는 용접과 희전속도와 프로브상에 가해진 압력사이의 최적관계를 도시한 그래프.
제5a -e도는 상이한 형태의 용접선의 개략사시도.
[발명의 상세한 설명]
도면에 있어서, 특히 제1도는 엔진(도시되지 않음)같은 동력원에 결합되어진 상부(22)를 갖춘 회전원통바디(2)와, 분리핀(24)을 구비한 바닥부(23)를 갖춘 비-소모성 프로브(1)가 도시된 바, 이 프로브(1)는 2개의 인접부재(금속판; 3,4)의 결합(용접)에사용된다. 여기서 적절한 마찰열을 얻기 위해 일정한 압력과 회전하에서 부재(3,4) 사이에 프로브(1)를 놓음으로써 인접하게 배치된 부재들을 따라 이동중에 용접부(5)가 형성된다. 본 발명에 따른 2부분으로 구성된 프로브(1)의 형상과 프로브 바닥부(23) 및 사용된 핀(24)의 형상은 제2도에 더욱 명확히 도시된 바, 여기서 상기한 회전하는 원통형 바디(2)의 바닥부(23)는 안으로 만곡된 표면을 가지며, 핀(24)의 외부표면에는 교대로 볼록한 부분과 오목한 부분이 종축을 따라 형성되어 있다.
그리고 외부핀 표면에 종래의 스크류 나사선을 사용하고 용접의 질을 향상시킨다 할지라도, 프로브핀의 바람직한 실시예에 있어서 도면에 도시한 바와 같이, 핀 표면에는 핀의 중심부로부터 수직하게 설치되어지면서 측방향으로 돌출한 2개 이상의 개별 블레이드(25)가 구비되어 있다.
한편 상기한 새로운 형태의 핀에 의해 형성되는 용접선의 세부구조는 최소의 물질교란을 수반하여 맞물린 결합부재의 가소화된 부분으로 이루어진 견고한 조인트를 나타낸다.
기존의 프로브의 이음매가 없는 디자인에 비해 분리된 프로브핀으로 구성된 프로브(1)의 복합 디자인은 몇몇 장점을 가지게 되는 바, 먼저 도구(프로브)가 핀 삽입의 깊이를 조절할 수 있으므로, 공정의 탄력성을 제공하게 되고, 둘째로, 핀부가 상이한 공구유니트들 사이에 교환이 용이하므로 다양한 두께를 갖는 부재들의 용접에 활용할 수 있게 된다.
새로운 공구와 향상된 마찰이동용접의 공정의 혁신된 특성은 제3도에 도시된 바와 같은 프로브의 개략적인 스케치와 용접수행으로 용이하게 이해할 수 있을 것인 바, 여기서 참조번호 W는 용접된 부재의 두께를 나타내고,ω는 용접속도, R은 오목한 프로브 바닥부의 곡률반경, F는 프로브에 가해진 하방력(압력), rS는 프로브 바닥부 반경 및 t는 용접된 물질안으로 바닥부의 "침투(undercut)"를 나타낸다.
한편 핀(24)의 상기한 스크류형상과 결합된 용접표면(도시되지 않음)의 법선에 대해 약간 경사진 프로브(1)의 만곡된 바닥표면(23)은 가소화된 물질을 용접지역내에서 수직방향과 측방향으로 미는 작용을 한다. 그리하여 용접 구역을 가로질러 상이한 레벨들 사이에 금속을 변형시키게 된다. 그리고 프로브 바닥부의 오목한 형상으로 인해 물질의 수직흐름/전이를 초래하는 부재들의 표면상에 비-대칭압력을 제공하게 되고, 이는 핀의 외부형상으로 인한 물질의 수평운동과 공조하면서 고품질의 틈이 없는 용접선을 생성하게 된다.
제4도는 프로브상에 가해진 하방력과, 매끄러운 표면을 갖는 틈이 없는 안전한 용접을 가능하게 하는 상이한 회전속도에서 실질적인 용접속도 ω(mm/min) 사이에서 최적관계를 개략적으로 도시한 것으로, 최적 압력/용접속도간의 실제값은 몇몇 요인에 의존하게 되는 바, 예컨대 결합된부재의 재질(Al-합금)이나 프로브 바닥부의 기하학적 형상등이다.
상이한 직경의 프로브에 대해 수행된 몇 번의 용접시험으로부터, 결합되 부재들의 실제 두께에 대한 프로브 바닥부의 직경 감소는 용접속도를 증가시킬 수 있는 가능성 외에도 결합부/용접선의 품질에 유익한 영향을 미친다는 것을 알 수 있었다.
예를 들면, 합금번호 6082.50인 3mm 두께의 편평한 사출 시편을 용접하는 데 프로브 바닥부의 직경을 20mm에서 15mm로 또 10mm까지 감소시키면, 열영향부(HAZ)가 감소하면서 빈틈없는 고품질의 용접을 달성할 수 있고 용접속도는 0.3m/min로부터 0.8m/min로 증가시키는 것이 가능하였다. 이는 열입력의 감소와 형성된 용접선의 가장자리를 향한 포커싱의 조합된 결과로, 용접속도의 증가를 가능하게 하면서, 프로브상에 가해지는 하방 압력을 감소시켜 비틀어짐이 없는 용접을 가능하게 한다.
한편 프로브 바닥부의 직경(rs)과 용접된 부재들의 두께(W) 사이에 최적의 관계 다음과 같은 간단한 공식으로 규정된다.
프로브의 재질은 결합될 작업부재들보다는 단단한 것이고, 통상 알루미늅(합금)부재들상에 활용하기 위해서는 프로브의 재질은 상승된 온도에서 강한 강도를 나타낼 있어야 하는 바, 예컨대 고온 작업강, 고속강 또는 도성합금(cennet) 재질이 사용될 수 있다.
제5a-e도는 본 발명에 따른 방법 및 프로브에 의해 제공되는 용접의 상이한 형태의 사시도를 개략적으로 도시한 것으로, 제5a도는 종래 접합용접을 도시한 것이고, 제5b도는 2개의 부재 사이에 T자형 결합을 도시하며, 제5c도는 겹치기 용접을 나타내며, 제5d도는 3개의 부재로 이루어진 T자형 결합의 다른 변형을 나타내며, 제5e도는 서로 수직한 평면내에 설치된 2개의 부재들 사이의 모서리 용접을 나타낸 것이다.
따라서 본 발명에 따른 장치를 사용함으로써 마찰열의 충분한 생성을 보장하면서 향상된 용접속도를 기대할 수 있게 되는 바, 이러한 효과는 용접재의 단위체적당 접촉/가열시간이 연장되고 용접선을 따라 발생된 열이 밀접히 집중되는 것에 기인하고 더욱이 보다 많은 압력이 용접프로브를 벗어날 때 용접부재에 가해진다. 그리고 상기한 적절한 효과들의 조합은 전체 용접힁단면에 걸쳐 기공이 존재하지 않는 균질화된 용접으로 인해 전체 용접횡단면을 통해 야금술적인 특성과 기계적인 특성에 관해서 모두 고품질의 용접을 가능하게 한다.

Claims (8)

  1. 서로를 향해 조립된 부재를 꽉붙아 부착하는 단계와, 조립된 부재의 재질보다 견고한 물질로 된 프로브에 의해 상기 조립된 부재를 서로 붙은 결합선을 따라 마찰열을 발생시키는 회전운동 조건하에 두어 인접 부재에 가소화된 영역을 생성시키는 단계, 상기 생성된 가소화된 부재에 부재의 표면을 따라 수직압력을 가함으로써, 또 상기 가소화된 부재를 프로브 뒤에서 경화되도록 하면서 프로브 핀의 이동에 따라 가소화된 재질을 수직압력과 동시에 측면으로 수직한 방향으로 흐르게 함으로써, 상기 인접하여 조립된 부재의 길이방향에 대해 측면으로 수직한 방향 및 수직면에서 수직한 방향으로 가소화된 부재를 확장해서 흘려 확보한 용접선을 균일화시키는 단계를 포함하는 인접한 부재들의 재질내에 가소성지역을 생성하는, 특히 사출되어 조립된 형상의 부재들을 마찰이동용접하는 방법.
  2. 제1항에 있어서, 상기 프로브의 바닥부(23)가 용접표면의 법선으로부터 기울어진 상태에서 결합될 부재들의 인접표면들을 결합하도록 된 것을 특징으로 하는 마찰이동용접방법.
  3. 제1항 또는 제2항에 있어서, 상기 프로브핀(24)의 외부형상이 용접지역을 가로질러 가소화된 물질의 수직과 측방향 흐름을 보장하도록 된 것을 특징으로 하는 마찰이동용접방법.
  4. 제1항 또는 제2항에 있어서, 상기 인접한 부재는 2개 이상의 부재로서 T자형상의 용접조인트를 제공하면서 용접되는 것을 특징으로 하는 마찰이동용접방법.
  5. 제1항 또는 제2항에 있어서, 제공된 접선은 랩용접 조인트인 것을 특징으로 하는 마찰이동용접방법.
  6. 제1항 또는 제2항에 있어서, 상기 제공된 용접선이 서로 임의의 각도로 설치된 2개의 부재들을 결합하는 모서리용접인 것을 특징으로 하는 마찰이동용접방법.
  7. 핀(24)을 구비한 바닥부(23)와 동력원에 결합된 상부(22)를 갖는 회전원 통바디(2)로 이루어진 마찰이동용접용 비-소모성프로브(1)에 있어서, 상기 프로브의 바닥부(23)는 오목한 면을 가지며, 부착된 핀(24)은 나사선의 표면형상을 나타내는 프로브의 교환가능한 부분인 것을 특징으로 하는 비소모성 마찰이동용접용 프로브.
  8. 제7항에 있어서, 상기한 핀이 핀의 중심부로부터 측방향으로 돌출하고 수직하게 설치된 2이상의 블래이드를 구비한 것을 특징으로 하는 마찰이동용접용 로브.
KR1019960704767A 1994-03-28 1995-01-05 마찰이동용접방법 및 마찰이동 용접용 프로브 KR100219003B1 (ko)

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NO941144A NO941144D0 (no) 1994-03-28 1994-03-28 Fremgangsmåte ved friksjonssveising og anordning for samme
NO941144 1994-03-28
NO942790A NO942790D0 (no) 1994-03-28 1994-07-27 Fremgangsmåte ved friksjonssveising og anordning for samme
NO942790 1994-07-27
PCT/NO1995/000005 WO1995026254A1 (en) 1994-03-28 1995-01-05 Friction stir welding

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CA2182719C (en) 1999-06-29
PL316614A1 (en) 1997-01-20
US5813592A (en) 1998-09-29
AU1592395A (en) 1995-10-17
JPH09508073A (ja) 1997-08-19
FI109886B (fi) 2002-10-31
NO942790D0 (no) 1994-07-27
EP0752926A1 (en) 1997-01-15
PL176524B1 (pl) 1999-06-30
JP2792233B2 (ja) 1998-09-03
FI963889A (fi) 1996-09-27
EP0752926B1 (en) 1998-05-27
WO1995026254A1 (en) 1995-10-05
CN1144499A (zh) 1997-03-05
CZ258696A3 (en) 1997-04-16
FI963889A0 (fi) 1996-09-27
CN1049618C (zh) 2000-02-23
DK0752926T3 (da) 1999-03-22
CZ287673B6 (en) 2001-01-17
ES2117851T3 (es) 1998-08-16
DE69502716D1 (de) 1998-07-02
AU676424B2 (en) 1997-03-06
CA2182719A1 (en) 1995-10-05
DE69502716T2 (de) 1998-11-26

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