JPS61124332U

JPS61124332U -

Info

Publication number: JPS61124332U
Application number: JP758085U
Authority: JP
Priority date: 1985-01-22
Filing date: 1985-01-22
Publication date: 1986-08-05
Also published as: JPH0214903Y2

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例である盛上げタツ
プの正面図であり、第２図は第１図における―
断面図、また第３図は第１図における―断
面図である。第４図は第１図に示す盛上げタツプ
によりナツト素材にめねじを形成する状態を説明
する図であり、第５図は第４図におけるめねじ山
の頂部が切除される前の状態を示す拡大断面図で
ある。第６図および第７図は、それぞれ一般的な
盛上げタツプによるめねじの塑性加工で生じるめ
ねじ山頂部の不完全部の例を示す拡大断面図であ
る。第８図は従来の盛上げタツプの具体例を示す
正面図であり、第９図はその横断面図である。第
１０図は別の例の従来例を示す正面図である。２：盛上げタツプ、４：加工用ねじ部、６：さ
らい刃部、８：ガイドねじ部、１０：シヤンク、
１２：食付きねじ部、１４：平行ねじ部、１６：
食付き部、１８：仕上げ部、２０：みぞ部、２２
：切れ刃、２８：めねじ山、３０：ナツト素材（
めねじ素材）、４０：不完全部（めねじ山の頂部
）。 FIG. 1 is a front view of a raised tap which is an embodiment of the present invention, and FIG.
3 is a cross-sectional view of FIG. 1. Fig. 4 is a diagram illustrating a state in which an internal thread is formed in a nut material using the raised tap shown in Fig. 1, and Fig. 5 shows a state before the top of the internal thread in Fig. 4 is removed. It is an enlarged sectional view. FIGS. 6 and 7 are enlarged cross-sectional views showing examples of imperfections at the tops of female threads that occur during plastic working of female threads using a common build-up tap. FIG. 8 is a front view showing a specific example of a conventional raised tap, and FIG. 9 is a cross-sectional view thereof. FIG. 10 is a front view showing another conventional example. 2: Raising tap, 4: Processing thread part, 6: Wiper blade part, 8: Guide thread part, 10: Shank,
12: Chamfered thread part, 14: Parallel thread part, 16:
Biting part, 18: Finishing part, 20: Groove part, 22
: Cutting edge, 28: Female thread, 30: Nut material (
female thread material), 40: Incomplete part (top of female thread).

Claims

[Scope of Claim for Utility Model Registration] (1) In a build-up tap that is provided with a threaded portion for processing and is screwed into the inner circumferential surface of an internally threaded material to form an internal thread on the inner circumferential surface by plastic working, A build-up tap characterized in that a wiper blade section is provided adjacent to the rear side of the working thread part in the relative spiraling direction with respect to the female thread material, for cutting off the top of the thread that is raised by the working thread part. . (2) The wiper edge portion has a chamfered portion in which the diameter of the cutting edge gradually increases as it moves away from the threaded portion for processing, a finishing portion where the diameter of the cutting edge is constant following the chamfering portion, and the chamfered portion and the finishing portion. 2. The raised tap according to claim 1 of the utility model registration claim, which is provided with a groove portion formed astride.