公开(公告)号：US3906771A

公开(公告)日：1975-09-23

申请号：US48922674

申请日：1974-07-17

Applicant: DRESSER IND

Inventor： MARTIN PAUL WARREN

IPC: B21D39/06

CPC classification number: B21D39/06

Abstract: A tube expander operable with random length tubing having variable length projection beyond the face of header sheet into which the tube is to be expanded. Rollers in an expander cage are supported on a rotatable mandrel for insertion inward of the tube end. An open ended non-rotatable, tubular thrust collar is adapted to envelop the tube end and is secured about the cage at a predetermined location generally rearward of the rollers. Within the collar and biased toward the open end thereof is a slideable stop sleeve sized to abut the projecting end of the tube. On being advanced over the tube projection toward the header sheet for preliminary positioning, the collar engages the sheet face to register location of the rollers within the tube in alignment with the header sheet. Concomitantly with positioning of the collar, the abutting tube end acts to prevent sleeve movement as to effect relative displacement between sleeve and collar which can then be secured for operation of the expander.

Abstract translation: 管扩管器，其可随机长度管可操作，其具有可变长度的突出部，超过管将要扩张到其中的集管片的表面。 膨胀机笼中的滚子支撑在可旋转的心轴上，用于插入管端的内侧。 开口的不可旋转的管状止推环适于包封管端，并且在大体在辊的后方的预定位置处围绕保持架固定。 在套环内并且偏向其开口端的是可滑动的止动套筒，其大小可抵靠管的突出端。 在将管突出部朝向头部片进行预先定位时，套环与片材表面接合，以使管子内的辊对准位置，以与头部片材对齐。 伴随着套环的定位，邻接的管端作用以防止套筒移动，以实现套筒和套环之间的相对位移，然后可以确保其用于扩张器的操作。

公开(公告)号：US3924433A

公开(公告)日：1975-12-09

申请号：US37768373

申请日：1973-07-09

Applicant: DRESSER IND

Inventor： MARTIN PAUL WARREN

IPC: B21D39/06 ,  B21D39/10 ,  B21D3/04 ,  B21D41/02

CPC classification number: B21D39/06 ,  B21D39/10

Abstract: A tube expander having a stop collar for limiting advance of a received tube end to a predetermined axial location relative to the expander rollers and their supporting cage. The collar is comprised of a plurality of individual L-shaped wire fingers circumferentially displaced about the cage. Each finger is spring biased radially inward against the cage periphery transversely to the path of tube advance. By this arrangement, the fingers are maintained in surface tracking relation against the rotating cage for collectively acting as a barrier against further advance by the tube end.