JPH0251024U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図Ａはこの考案に係るねじ切りダイスの実
施例を示す正面図、第１図Ｂは同上断面図、第２
図は同上斜面図、第３図は他の実施例を示す正面
図、第４図は切削トルク比較図、第５図はテーパ
ねじ切りダイスの１刃を示す側面図、第６図Ａ，
Ｂは従来のテーパねじ切りダイスの１刃を示す側
面図である。 １……ランド、２……食付き部、３……完全山
部、４……刃部、５……ねじ部、６……刃先、７
……刃裏。 FIG. 1A is a front view showing an embodiment of the thread cutting die according to this invention, FIG. 1B is a sectional view of the same, and FIG.
Figure 3 is a front view showing another embodiment, Figure 4 is a cutting torque comparison diagram, Figure 5 is a side view showing one blade of the tapered thread cutting die, Figure 6A,
B is a side view showing one blade of a conventional taper thread cutting die. 1... land, 2... chamfered part, 3... complete ridge part, 4... blade part, 5... threaded part, 6... cutting edge, 7
...The back of the blade.

Claims (1)

【実用新案登録請求の範囲】 １ ランドの数を４以上の偶数とし、各ランドの
食付き部の長さを等しくし、これに続く完全ねじ
山部の長さを長短の２種類とし、これを１ランド
飛びに交互に配した構成を特徴とするねじ切りダ
イス。 ２ テーパねじ切りダイスであつて、切刃の刃先
から刃裏までのねじ部径をリードに沿つて同径と
したことを特徴とする請求項１に記載のねじ切り
ダイス。[Scope of Claim for Utility Model Registration] 1. The number of lands is an even number of 4 or more, the length of the chamfered part of each land is equal, and the length of the fully threaded part following this is of two types, long and short, and A thread cutting die characterized by a structure in which the dies are arranged alternately in one-land increments. 2. The thread cutting die according to claim 1, wherein the thread diameter from the tip of the cutting blade to the back of the blade is the same along the lead.