METHOD FOR SPLITTING END PART OF METAL PLATE OR METAL ROD, METAL PARTS MANUFACTURED BY SUCH END SPLITTING METHOD, AND METHOD FOR BONDING SUCH METAL PARTS

摘要

Provided are a method for splitting longitudinally an end part of a metal plate (1) or a metal rod (2) having a rectangular, polygonal, or elliptical shape, in which the length of incision in the split portion can be freely adjusted and smooth split face can be formed; a metal part manufactured by such method; and a method for bonding such metal part. The present invention is characterized by the process comprising the steps of securing a metal plate by pinching both sides thereof with a clamping device (3), or securing a metal rod by pinching at least two opposite-facing portions on the periphery thereof with a clamping device (3); splitting longitudinally by slitting or cleaving the metal plate, or the metal rod, by pressing a slitting punch (4) or a cleaving punch (5) against the face of one end of the metal plate (1), or the metal rod (2); and advancing the splitting further by repeating the same operation of pressing the same punch stated above against the cleft of the splitting. In each press-splitting operation, the position of the clamping device (3) on at least one side is moved in advance of the next pressing by a stroke corresponding to the distance from one end of the metal plate (1), or the metal rod (2), to the distal end of a split-desired portion.