Flexible and Incremental Sheet Metal Bulging using a Path-Controlled Spherical Roller
Flexible and Incremental Sheet Metal Bulging using a Path-Controlled Spherical Roller
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使用路径控制球面滚子进行柔性增量金属板胀形
DOI：
10.1299/kikaic.58.3147
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
S. Sakamoto
中科院分区：
文献类型：
--
作者：
H. Iseki;Kazunori Kato;S. Sakamoto
为实现非对称扁壳的小批量加工，研制了一种基于轨迹控制球面滚子的柔性增量式板材胀形机。计算机操作控制的胀形机对复杂形状的板材进行了广泛的成形，例如金字塔壳、金字塔锥体的壳、浅平底锅和浮雕面板。为了预测渐进成形的成形极限，用球头冲头对退火铝板材进行了新的渐进胀形实验，实验结果表明，当厚度应变达到n恒定值时，就会发生断裂。利用该断裂极限和几何变形模型，提出了壳体最大胀形高度的近似计算方法。对四角锥体和四角锥体壳体的预测结果与实验结果吻合较好。
A flexible and incremental sheet metal bulging machine using a path-controlled spherical roller has been developed for the small-batch manufacture of nonsymmetrical shallow shells. The computer operations-controlled bulging machine performed a wide range of sheet metal shaping on complex shapes, for example, pyramidal shells, shells of the frustum of a pyramid, shallow pans and embossed panels. In order to predict the forming limit of incremental shaping, a new incremental bulging test by a ball punch was performed on an annealed aluminum sheet, and the experimental results showed that fracture occurred when the thickness strain reached n constant value. An approximate calculation method for the maximum bulging height of the shell was proposed, using this fracture limit and a geometrical deformation model. The predictions for the shell of the frustum of a quadrangular pyramid and the quadrangular pyramidal shell were in reasonably good agreement with experimental values for the annealed aluminum sheet.