公开(公告)号：US4882823A

公开(公告)日：1989-11-28

申请号：US149216

申请日：1988-01-27

申请人： Edward D. Weisert ,  John R. Fischer ,  William L. McCauley

发明人： Edward D. Weisert ,  John R. Fischer ,  William L. McCauley

IPC分类号： B21D26/055 ,  B23K20/18

CPC分类号： B21D26/055 ,  B23K20/18 ,  Y10T29/18 ,  Y10T29/49339 ,  Y10T29/49805

摘要： A method is set forth of forming a hollow structure having a varying mass distribution. Two sheets of a diffusion bondable and superplastic formable material are formed with one flat surface and an opposite surface contoured to have a selected mass distribution. A stop-off material is applied between selected non-peripheral portions of each of the flat surfaces whereat diffusion bonding is to be prevented and superplastic forming is to be required. An intermediate flat core sheet may also be present. The flat surfaces are positioned in abutting relation to each other or to the intermediate flat core sheet. The sheets are subjected to diffusion bonding conditions. The sheets are superplastically formed to expand them apart against a die. The invention also provides a method of preinflating contoured sheets prior to superplastically forming them to avoid truss core rupture. Hollow aircraft engine components are formed by the methods.

摘要翻译： 阐述形成具有不同质量分布的中空结构的方法。 两片可扩散粘合和超塑性可成形材料形成有一个平坦表面和相对的表面，具有选定的质量分布。 在每个平坦表面的选定的非外围部分之间施加停止材料，其中需要防止扩散接合，并且需要超塑性成形。 也可以存在中间扁平芯片。 平坦的表面彼此邻接或与中间平的芯片片相对置。 片材经受扩散接合条件。 片材被超塑性地形成以使它们相对于模具分开。 本发明还提供了一种在超塑性成型之前对成形片材进行预压缩以避免桁架芯断裂的方法。 中空飞机发动机部件由方法形成。