| 摘要 |
<p>Each lamination is an elongated rectangular strip, whose overall length equates to the stator core circumference. Slots, eventually to receive the stator winding, are stamped out along one long side; the opposite edge undulates slightly, with dips opposite each tooth on the slotted edge. Enough laminations are stacked to make a block, transversely slotted on one side and equal in width to the required stator core. The block is consolidated by e.g. two lines of weld on the undulating face, and laid, this side down, on a support surface (27) in a press having e.g. 4 sets of forming tools mounted on as many parallel plates. The block is subjected, by each set in turn, to a rolling process, finally acquiring the hollow cylindrical form of the internally slotted stator core. The longitudinal meeting edges are then welded together. Each press plate (17) has a central opening (17') through which the work-piece moves on to the next forming stage. An upper mounting block (28) carries a shaping block (31), holding the work-piece against the support plate (27). The work-piece ends (A,B) are rolled against the curved shaping block ends (31A,31B) by two matrix pieces (32,33), pivoted on the block, actuated by thrust links (29,30). In subsequent stages, pressure is applied laterally and radially to produce the circular form. A calibrating press then checks for circularity.</p> |
