| 摘要 |
11 The invention is concerned with a process and a machine for the forming of metal tubes into conically shaped or tapered bodies. In this process the metal tube blank is worked by a pair of rolls (2, 3) engaging and rolling the tube exterior, each of said rolls exhibiting on their working surface (4) a groove of a cross section corresponding to half the cross-sectional shapes of the tube blank, said groove being tapered in the circumferential direction. During rotation of the rolls (2, 3), the blank is drawn by means of a grip tong (6) through the deformation cross section between the rolls which forms a die. Between individual drawing operations, the blank is rotated by the grip tong (6). Figure 1
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