The present invention relates to a girder for downward welding and an automatic welding apparatus thereof. According to a girder of the present invention, the width of an upper board is larger than the width between a first side board and a second side board so that both sides of the upper board are arranged to be protruded more than an outer side of the first side board and the second side board. A finishing board is arranged in a space between the first side board and the second side board, so that an end of the first side board and the second side board is protruded more than an outer side of the finishing board. And, a first ~ fourth welding part comprising a first ~ fourth welding torch are installed at a first ~ fourth downward welding part. When a main frame is transferred in a length direction of the girder, the first ~ fourth welding torch are transferred together with the main frame and performs downward welding of the first ~ fourth downward welding part. Therefore, without changing a position of the girder, the first downward welding part, the second downward welding part, the third downward welding part and the fourth downward welding part which are external welding parts of four parts formed by the upper board, the first side board, the second side board and the finishing board are downwardly welded at a time automatically. And, a welding work can be done very simply and rapidly since the girder welding part of four parts can be downwardly welded automatically by one process without overtuning the girder.

    본 발명은 하향용접용 거더 및 그 자동용접장치에 관한 것으로, 본 발명의 거더는, 상판의 폭은 제1측면판 및 제2측면판 사이의 폭보다 더 크게 형성되어서 상판의 양측이 제1측면판 및 제2측면판의 외측면보다 더 돌출되도록 배치되며; 마감판은 제1측면판 및 제2측면판 사이의 공간 내에 배치되어서 제1측면판 및 제2측면판의 단부가 마감판의 외측면보다 더 돌출되도록 구비된다. 그리고, 거더의 제1~4하향용접부에는 제1~4용접토치가 구비된 제1~4용접부가 설치되고, 메인프레임이 거더의 길이방향을 따라 이송되면 제1~4용접토치가 메인프레임과 함께 이송되면서 제1~4하향용접부를 동시에 하향 용접한다. 따라서, 거더의 위치를 바꾸지 않고도 상판, 제1측면판, 제2측면판, 마감판에 의해 형성된 네 부분의 외부 용접 부위인 제1하향용접부, 제2하향용접부, 제3하향용접부, 제4하향용접부가 모두 한번에 자동으로 하향 용접된다. 그리고, 거더를 뒤집지 않고도 네부분의 거더 용접부위를 한번의 공정으로 자동으로 하향 용접할 수 있으므로 용접 작업이 매우 간편하고 신속하다.


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    Title :

    GIRDER AND THE AUTOMATIC WELDING UNIT FOR FLAT WELDING


    Additional title:

    하향용접용 거더 및 그 자동용접장치


    Contributors:
    CHO DUCK RAE (author) / KUK JUNG MIN (author)

    Publication date :

    2016-04-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B66C Krane , CRANES / B23K Löten , SOLDERING OR UNSOLDERING



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