JPS6357025U

JPS6357025U -

Info

Publication number: JPS6357025U
Application number: JP14949286U
Authority: JP
Priority date: 1986-10-01
Filing date: 1986-10-01
Publication date: 1988-04-16

Description

[Brief explanation of the drawing]

第１図は一般的なヘリカルブローチの側面図、
第２図は替刃の部分切断側面図、第３図は第２図
―からつるまき線に沿つて視た刃形図、第４
図は第３図―線からつる巻き線に沿つて視た
刃形図であつて、第３図、第４図は切削状況を模
型的に示す。第５図は従来品の刃形及び切削状況
の模型図であり、イは鋭角側、ロは鈍角側を示す
。第６図乃至第８図は従来品の切削状況の説明図
であつて、第６図は切刃の正面図、第７図は同側
面図、第８図は模型図である。１…本体、２′…切刃、２…前加工切刃、３…
替刃、５…小径部、イ…第１の切刃群、ロ…第２
の切刃群、Ｘ―Ｘ…中心線、Ｙ―Ｙ…つるまき線
。 Figure 1 is a side view of a typical helical brooch.
Figure 2 is a partially cutaway side view of the spare blade, Figure 3 is a diagram of the blade shape seen along the spiral line from Figure 2, and Figure 4 is a side view of the spare blade.
The figure is a diagram of the blade shape seen along the helical wire from the line in Figure 3, and Figures 3 and 4 schematically show the cutting situation. FIG. 5 is a model diagram of the blade shape and cutting conditions of the conventional product, where A shows the acute angle side and B shows the obtuse angle side. 6 to 8 are explanatory diagrams of cutting conditions of the conventional product, in which FIG. 6 is a front view of the cutting blade, FIG. 7 is a side view thereof, and FIG. 8 is a model diagram. 1... Main body, 2'... Cutting blade, 2... Pre-processing cutting blade, 3...
Spare blade, 5... Small diameter part, A... First cutting blade group, B... Second
Cutting blade group, X-X... center line, Y-Y... hanging line.

補正昭６１．１２．３実用新案登録請求の範囲を次のように補正する
。Amendment December 3, 1986 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】外周に前加工切刃を形成した本体の小径部に、
前加工切刃に続く切刃を形成した替刃を挿着し、
かつ各切刃を本体の中心線に対して一定のねじれ
角をもつて順次つるまき状に配列したヘリカルブ
ローチにおいて、替刃に形成された切刃を切削順
に第１の切刃群と第２の切刃群とに区分し、第１
の切刃群では鋭角側のみを歯厚方向と外径方向に
切削する切刃を形成し、第２の切刃群では鈍角側
のみを歯厚方向に切削する切刃を形成すると共に
、各切刃群の非切削側を案内面としたことを特徴
とするヘリカルブローチ。図面の簡単な説明を次のように補正する。明細書第７頁８行目に「第４図は第３図」とあ
るのを「第４図は第２図」と訂正する。[Scope of claim for utility model registration] In the small diameter part of the main body with a pre-processed cutting edge formed on the outer periphery,
Insert the spare blade that has formed the cutting edge that follows the pre-processed cutting blade,
In a helical broach in which each cutting edge is arranged in a helical manner at a constant helix angle with respect to the center line of the main body, the cutting edges formed on the replaceable blade are arranged in the first cutting edge group and the second cutting edge group in the cutting order. The cutting edge group is divided into two groups.
The cutting blade group forms a cutting blade that cuts only the acute angle side in the tooth thickness direction and the outer diameter direction, and the second cutting blade group forms a cutting blade that cuts only the obtuse angle side in the tooth thickness direction, A helical broach characterized by the non-cutting side of each cutting edge group serving as a guide surface. The brief description of the drawing has been amended as follows. On page 7, line 8 of the specification, the statement ``Figure 4 is Figure 3'' is corrected to ``Figure 4 is Figure 2''.

Claims

[Scope of utility model registration request]

The small diameter part of the main body has a pre-processed cutting edge formed on the outer periphery.
Insert the spare blade that has formed the cutting edge that follows the pre-processed cutting blade,
In a helical broach in which each cutting edge is arranged in a helical manner at a constant helix angle with respect to the center line of the main body, the cutting edges formed on the replaceable blade are arranged in the first cutting edge group and the second cutting edge group in the cutting order. The cutting edge group is divided into two groups.
In the second cutting blade group, a cutting blade that cuts only in the tooth thickness direction and in the outer diameter direction is formed on the acute angle side, and in the second cutting blade group, a cutting blade that cuts only on the acute angle side is formed in the tooth root direction, and each A helical broach characterized by using the non-cutting side of the cutting blade group as a guide surface.