专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US6016603A Method of hydroforming a vehicle frame component 失效
标题翻译：液压成型车架部件的方法
公开(公告)号：US6016603A
公开(公告)日：2000-01-25
申请号：US76683
申请日：1998-05-12
申请人： Richard A. Marando , Thomas R. Sanko , Eric M. Schrack
发明人： Richard A. Marando , Thomas R. Sanko , Eric M. Schrack
IPC分类号： B21D26/033 , B62D25/00 , B23P11/02
CPC分类号： B21D26/033 , B21D15/03 , B62D25/00 , B60G2206/012 , B60G2206/8107 , Y10T29/49622 , Y10T29/49805 , Y10T29/4994
摘要： A method for hydroforming a closed channel structural member that allows the perimeter to be increased, but which maintains a relatively uniform wall thickness throughout, includes the initial step of disposing a closed channel structural member, such as a tube, within a first hydroforming die defining a first die cavity. The inner surface of the first die cavity corresponds in cross sectional shape to the outer surface of the tube, but the perimeter of the first die cavity is somewhat larger than the perimeter of the tube enclosed therein. A preliminary hydroforming operation is then performed at a relatively high pressure to expand the tube into conformance with the first die cavity. Throughout most of this expansion, the outer surface of the tube does not engage the inner surface of the die cavity. As a result, as the perimeter of the tube is increase, the wall thickness thereof is decreased uniformly. The preliminarily expanded tube is then disposed within a second hydroforming die defining a second die cavity. The inner surface of the second die cavity corresponds in cross sectional shape to the desired final shape for the tube. When the second hydroforming die is closed, a final hydroforming operation is performed at a relatively low pressure to deform the tube into conformance with the second die cavity. Because the perimeter of the tube is approximately equal to the perimeter of the second die cavity, the wall thickness of the tube is unchanged by the final hydroforming operation.
摘要翻译：用于液压成型允许周边增加但是保持相对均匀的壁厚的封闭通道结构构件的方法包括将闭合通道结构构件（例如管）设置在第一液压成形模具内的初始步骤，所述第一液压成形模具限定第一模腔。第一模腔的内表面的横截面形状对应于管的外表面，但是第一模腔的周边稍大于封装在其中的管的周长。然后在相对较高的压力下进行初步液压成形操作，以将管扩大成与第一模腔一致。在大部分膨胀过程中，管的外表面不与模腔的内表面接合。结果，随着管的周长增加，其壁厚均匀地降低。然后将预先膨胀的管子设置在限定第二模腔的第二液压成形模具内。第二模腔的内表面的截面形状对应于管的期望的最终形状。当第二液压成形模具闭合时，在相对低的压力下进行最终的液压成形操作，以使管变形成与第二模腔一致。因为管的周边大致等于第二模腔的周长，所以通过最终的液压成形操作，管的壁厚不变。

IPRDB

热门服务

关于我们

友情链接

联系方式