• 제목/요약/키워드: friction stir spot welding

검색결과 34건 처리시간 0.037초

고속 열차용 대형 알루미늄 부품의 GAP 대응 로봇 자동화 용접 기술 (Technologies for Robotized Welding of Big Aluminium Structures with Tolerances for High Speed Trains)

  • 이상철
    • Journal of Welding and Joining
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    • 제31권1호
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    • pp.33-37
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    • 2013

  • Robotized MIG welding of large aluminium components for high speed trains is state-of-the-art. The implementation of online laser cameras enables seam tracking and adoptive modification of welding parameters. A constant fill is achieved regardless of the gap tolerances. Friction Stir Welding has been introduced to the market as a reliable and fast joining technology. The advantages of high welding speeds and the elimination of arc light, fumes and liquefaction in the welding spot lead to economical realisation of heavy-duty gantry systems. FSW robots offer a high flexibility with regard to welding of curved parts, and can be equipped with laser cameras for exact joint tracking.

  • https://doi.org/10.5781/KWJS.2013.31.1.33 인용 PDF KSCI

알루미늄 판재의 전기저항가열 압출점접합공정에 있어서 핀의 높이가 접합강도에 미치는 영향에 관한 연구 (A Study on the Effect of Pin Height on Weld Strength in Extru-Rivet Spot Welding of Aluminum Plates)

  • 이성준;김태현;진인태
    • 소성∙가공
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    • 제23권5호
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    • pp.282-288
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    • 2014

  • It is difficult to control welding variables during spot welding of non-ferrous metals like aluminum because of the low electrical resistance of the material. It has been suggested that a solid state welding process such as friction stir spot welding or extru-spot welding can be used to spot weld aluminum plates. In the extru-spot welding, there is a need to increase the weld strength by improving the shape of the welding die. The current study shows that the weld strength for an extru-spot welding can be increased by using a pin placed on the inside of the upper electrode in the welding die. In the current study, the deformed shape of the insert rivet and the stress distribution in the welding zone were analyzed by simulation. Extru-rivet spot welding experiments were performed by changing the height of pin on the inside of the upper electrode. From the experimental result, it is shown that the weld strength for an extru-rivet spot welding can be increased by adjusting the height of the pin. The optimal shape of the deformed rivet after the extru-rivet spot welding can be observed from the simulation results. The deformed shape of the insert rivet can also be controlled by the height of pin.

  • https://doi.org/10.5228/KSTP.2014.23.5.282 인용 PDF KSCI KPUBS HTML

알루미늄 합금/고장력 강판 겹치기 마찰교반점용접에서 공구 형상과 삽입 깊이에 따른 접합 특성 (Effect of Tool Shape and Insertion Depth on Joining Properties in Friction Stir Spot Welding of Aluminum Alloy/high-strength Steel Sheets)

  • 안수호;정영근
    • 한국분말재료학회지
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    • 제31권1호
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    • pp.37-42
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    • 2024

  • Friction stir spot welding (FSSW) is a solid-state joining process and a rapidly growing dissimilar material welding technology for joining metallic alloys in the automotive industry. Welding tool shape and process conditions must be appropriately controlled to obtain high bonding characteristics. In this study, FSSW is performed on dissimilar materials AA5052-H32 aluminum alloy sheet and SPRC440 steel sheet, and the influence of the shape of joining tool and tool insertion depth during joining is investigated. A new intermetallic compound is produced at the aluminum and steel sheets joint. When the insertion depth of the tool is insufficient, the intermetallic compound between the two sheets did not form uniformly. As the insertion depth increased, the intermetallic compound layer become uniform and continuous. The joint specimen shows higher values of tensile shear load as the diameter and insertion depth of the tool increase. This shows that the uniform formation of the intermetallic compound strengthens the bonding force between the joining specimens and increases the tensile shear load.

  • https://doi.org/10.4150/KPMI.2024.31.1.37 인용 PDF

마그네슘 합금 판재의 마찰 교반 점용접 시 툴 속도가 접합특성 및 강도에 미치는 영향 (The Effect of Probe Tool Speed on Weld Characteristics and Strength during Friction Stir Spot Welding of Mg-alloy Sheets)

  • 정윤철;박성수;신형섭;최광
    • 대한용접접합학회:학술대회논문집
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    • 대한용접접합학회 2010년도 춘계학술발표대회 초록집
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    • pp.64-64
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    • 2010

  • 최근 그린 친환경, 지구온난화방지와 환경 부하물질저감, 기기 고효율화, 연비향상 등의 관점에서 항공기, 자동차 등 운송기계와 휴대용 전자제품 등 경량화가 요구되는 분야에서 경량합금의 사용이 급증하고 있다. 특히, 경량합금 중 가장 가벼운 마그네슘 합금은 최근 주목을 받고 있는 금속재료이다. 그러나 마그네슘합금은 알루미늄합금과는 달리 상온 성형성 및 접합성이 양호하지 않은 관계로 판재를 이용한 구조부품의 제작을 위해서는 많은 연구가 필요하다. 이러한 관점에서 본 연구는 마그네슘합금 판재의 마찰 교반 점용접을 시도하였다. CNC 밀링머신을 사용하여 프로브의 회전 및 삽입 속도에 변화를 주어 접합 특성을 평가하였고, 각 변수의 영향을 조사하였다. 적외선 열화상기와 로드셀을 사용하여 마찰 교반 점용접 중에 발생하는 교반부 온도와 접합부에 가해지는 수직부가하중의 거동을 측정하였다. 마찰 교반 점용접 후, 시험편의 접합 상태와 접합부 단면 관찰을 통해 접합 상태를 조사하였다. 그리고 인장전단 실험을 실시하여 마찰 교반 점용접된 시혐편의 접합강도를 평가하였고, 파단된 시험편의 파면을 관찰하였다.

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