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    • 5. 发明公开
    • Method and apparatus for drawing heavy wall shells with a multi-step inside edge
    • 为厚壁管与多个的绘制方法和装置台阶内边缘。
    • EP0137580A2
    • 1985-04-17
    • EP84303895.1
    • 1984-06-08
    • VERSON ALLSTEEL PRESS COMPANY
    • Budrean, John DimitrewKirkpatrick, John Addison
    • B21D22/28B21D51/54
    • B21D22/28B21D22/21B21D51/54
    • A forming machine (10) is provided for forming a finished part (12) from a flat blank (14). Draw stations (18-24) are provided to initially form the intermediate part. Each draw station includes a punch (44, 62, 66, 70') and a draw die (48, 64, 68, 72). Each punch defines a shoulder along its length to create a first step (60) in the side walls (26) of the intermediate part. In a subsequent draw stage, a draw punch (70') forms a second shoulder along its length to create a second step (100) in the side walls (26) of the intermediate part. A draw shoulder (61) on the draw punch (71') mates with the step (60) to maintain the concentric shape thereof. In the subsequent necking and final form stages (30, 32, 34) the punch employed also has a shoulder to permit variation of the force applied to the intermediate part between the step and bottom portion.
    • 所述的成形机(10)提供用于形成从平坦坯件(14)完成的部分(12)。 提供绘制站(18-24)以初步形成中间部分。 每个站包括一个拉深冲头(44,62,66,70分钟)和绘制(48,64,68,72)。 各冲头限定肩部沿其长度以在所述中间部分的侧壁(26)的第一步骤(60)。 以平局后续阶段,平局冲头(70分钟)形成沿其长度的第二肩部以在中间部分的侧壁(26)的第二步骤(100)。 平局肩(61)与所述步骤(60)的拉深冲头(71分钟)配合以保持其同心形状。 在随后的颈缩和最终形式的阶段(30,32,34),因此所使用的冲头具有肩,以允许施加到步骤部分和底部部分之间的中间部分上的力的变化。