公开(公告)号：US07302746B2

公开(公告)日：2007-12-04

申请号：US11000284

申请日：2004-11-30

申请人： Albert S. Kuo

发明人： Albert S. Kuo

IPC分类号： B23P11/02 ,  B23P11/00 ,  B21D39/08

CPC分类号： B23P9/025 ,  C21D7/12 ,  Y10T29/49863 ,  Y10T29/49915 ,  Y10T29/53717

摘要： A method and apparatus for coldworking holes using rotational mandrel. The apparatus uses a tubular seamless sleeve made of shape memory alloys having a superelasticity property, a mandrel having major and minor diameter portions, an end-cap to seat and restrain axial and rotational motion of said sleeve. The preferred coldworking operation includes the steps of placing the sleeve firmly between the end-cap and the adapting-spacer which are carried on a mandrel pulling means, passing forward the major diameter portion of the mandrel through the sleeve whose diameter is therefore elastically expanded and thereafter shrinks, inserting the sleeve together with the mandrel into said hole, placing the end-cap against the workpiece, retracting while rotating the mandrel backward through and out of the sleeve; thereby expanding the sleeve wall against the hole bore and exerting radial outward force on the sleeve which in turn transmits the coldworking force to the hole bore and plastically expand said hole; thereafter the sleeve diameter shrinking to a smaller size to ease the removal of the sleeve out of the hole. The sleeve is reusable due to the superelasticity property of shape memory alloys.

摘要翻译： 用于使用旋转心轴对钻孔进行冷加工的方法和装置。 该装置使用由具有超弹性的形状记忆合金制成的管状无缝套管，具有主要和小直径部分的心轴，用于支撑和限制所述套筒的轴向和旋转运动的端盖。 优选的冷加工操作包括将套筒牢固地放置在末端盖和适配间隔件之间的步骤，承载在心轴拉动装置上，将心轴的大直径部分穿过其直径弹性膨胀的套筒， 然后收缩，将套筒与心轴一起插入到所述孔中，将端盖放置在工件上，在将心轴向后通过和离开套筒的同时回缩; 从而使套筒壁相对于孔孔膨胀并且在套筒上施加径向向外的力，其又将冷加工力传递到孔孔并塑性地膨胀所述孔; 此后套筒直径缩小到更小的尺寸以便于将套筒从孔中移出。 由于形状记忆合金的超弹性，套筒可重复使用。