公开(公告)号：WO0031424A8

公开(公告)日：2000-12-21

申请号：PCT/US9927790

申请日：1999-11-23

Applicant: TEXTRON INC

Inventor： DONOVAN STEVEN P

IPC: B21H3/06 ,  F16B35/04

CPC classification number: B21H3/06 ,  F16B35/047

Abstract: The present invention provides a novel fastener member, stud, or other threaded member (22, 22b), for engagement with a female member (26), and the method of assembly thereof. The fastener member (22, 22b) has a novel point (20, 20b) which facilitates engagement of the fastener member (22, 22b) in the threaded bore (24), greatly reduces the possibility of cross-threading and is especially suited for use in applications involving blind holes or the use of very thin threaded holes. The fastener member (22, 22b) has a threaded shank portion (36, 36b). A point (20, 20b) is provided at the end of the shank portion (36, 36b) and includes an unthreaded radiused portion (44, 44b) and a threaded transition portion (42, 42b) between the shank portion (36, 36b) and the radiused portion (44, 44b). The major surfaces of the threads (56, 56b) of the transition portion (42, 42b) gradually lessen between the opposite ends thereof. The radiused portion (44) can be provided with a truncated end surface (60).

Abstract translation: 本发明提供了一种用于与阴构件（26）接合的新型紧固构件，螺柱或其它螺纹构件（22,22b）及其组装方法。 紧固件（22,22a）具有促进紧固构件（22,22a）在螺纹孔（24）中的接合的新颖点（20,20b），大大降低了交叉穿线的可能性，特别适用于 用于涉及盲孔的应用或使用非常细的螺纹孔。 紧固件（22,22b）具有螺纹柄部分（36,36b）。 一个点（20,20b）设置在柄部分（36,36b）的端部，并且包括无柄圆角部分（44,44b）和在柄部分（36,36b）之间的螺纹过渡部分（42,42b） ）和圆角部分（44,44b）。 过渡部分（42,42b）的螺纹（56,56b）的主表面在其相对端之间逐渐减小。 圆角部分（44）可以设置有截头端面（60）。

公开(公告)号：WO9831959A2

公开(公告)日：1998-07-23

申请号：PCT/US9723791

申请日：1997-12-22

Applicant: TEXTRON INC

Inventor： DONOVAN STEVEN P

IPC: F16L55/10 ,  F16B25/00 ,  F16B33/00 ,  F16L55/11 ,  F16L

CPC classification number: F16B25/0021 ,  F16B25/0057 ,  F16B33/004 ,  F16L55/1108

Abstract: The invention involves primarily a novel self-thread-forming plug and fastener (10, 110, 210, 310, 410, 510, 610, 710) for sealing and forming internal threads (30, 130, 230, 330, 430, 530, 634, 730) in an opening (20) in a workpiece (P). The plug and fastener includes: a shank (12) having a driving portion (11) thereon and a first threaded portion or thread-forming portion (14, 114, 214, 314, 414, 514, 614, 714) for cold forming internal threads in an internal wall portion (18, 118, 218, 318, 418, 518, 618, 718) of the opening in accordance with a predetermined configuration, such as the NPTF standard. A second threaded portion (15, 115, 215, 315, 415, 515, 615, 715) is provided adjacent the thread-forming portion to engage with the internal threads formed by the first threaded portion in interfering sealed engagement. The plug and fastener of the present invention may further include a sealing portion extending from the thread-forming portion toward an end portion of the shank which initially enters the workpiece opening. The sealing portion is configured to engage and seal against the wall of the workpiece opening in order to supplement the sealing attained by the threaded engagement of the second threaded portion with the internal threads formed in the workpiece opening by the thread-forming portion. The sealing portion may be used on the novel self-thread forming plug and fastener disclosed or on standard NPTF threaded plug. In addition, the sealing portion is diametrically dimensioned smaller than the smallest minor diameter of the internal threads, so that the plug and fastener may be removed without damage to the internal threads. Further, a method of providing a seal between the self-thread-forming plug and fastener and a workpiece having an opening formed is disclosed which eliminates the step of tapping the workpiece opening and the problem of cross threading upon initial assembly.

Abstract translation: 本发明主要涉及用于密封和形成内螺纹（30,130,230,330,430,530,630）的新颖的自线形成塞和紧固件（10,110,210,310,410,510,610,710） 634,730）在工件（P）的开口（20）中。 塞子和紧固件包括：在其上具有驱动部分（11）的柄（12）和用于冷成形内部的第一螺纹部分或螺纹形成部分（14,114,214,314,414,514,614,714） 根据诸如NPTF标准的预定配置，在开口的内壁部分（18,118,218,318,418,518,618,718）中的螺纹。 第二螺纹部分（15,115,215,315,415,515,615,715）设置成邻近所述线形成部分以与所述第一螺纹部分形成的所述内螺纹以干涉密封接合接合。 本发明的塞子和紧固件还可以包括从螺纹形成部分向柄部的最初进入工件开口的端部延伸的密封部分。 密封部分构造成与工件开口的壁接合并密封，以便补充由第二螺纹部分与通过螺纹形成部分形成在工件开口中的内螺纹的螺纹接合而获得的密封。 密封部分可以用于公开的新型自螺纹成型塞和紧固件上，或者用于标准NPTF螺纹塞。 此外，密封部分的直径尺寸小于内螺纹的最小小直径，使得插塞和紧固件可以被移除而不损坏内螺纹。 此外，公开了一种在自线形成塞和紧固件之间提供密封件和形成有开口的工件的方法，其消除了在初始组装时攻丝工件开口的步骤和交叉螺纹的问题。