The similar problem on computing blank size also exists in sheet forming, such as spreading size of bending piece, blank size of axial symmetry parts by deep drawing.
板材成形中同样存在着计算坯料尺寸的问题，如弯曲件展开尺寸的计算，轴对称拉深件坯料尺寸的确定等。
The downward drawing formation device and method for producing sheet material is applied in producing great size glass plate in low cost, high efficiency and high quality.
一种利用狭长孔下拉法生产薄板材料的成型设备及方法。
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