JPS6031862Y2 - Rotary tool for counterbore - Google Patents
Rotary tool for counterboreInfo
- Publication number
- JPS6031862Y2 JPS6031862Y2 JP5273681U JP5273681U JPS6031862Y2 JP S6031862 Y2 JPS6031862 Y2 JP S6031862Y2 JP 5273681 U JP5273681 U JP 5273681U JP 5273681 U JP5273681 U JP 5273681U JP S6031862 Y2 JPS6031862 Y2 JP S6031862Y2
- Authority
- JP
- Japan
- Prior art keywords
- tool
- cutting
- cutting edge
- neck
- counterbore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Drilling Tools (AREA)
Description
【考案の詳細な説明】
本考案は、被削材の下穴中に工具のアーバーを導入し、
裏ざぐりを行なう回転工具に関する。[Detailed description of the invention] This invention introduces the arbor of the tool into the prepared hole of the workpiece,
This invention relates to a rotary tool for counterboring.
在来の当該工具には取扱方法、切削能率および工具寿命
等の諸面に於いて難点がある。These conventional tools have drawbacks in various aspects such as handling, cutting efficiency, and tool life.
例えば個々の裏ざくり切削の都度被削材の下穴中にアー
バーを導入し、その裏側に於いて回転工具（以下工具と
いう）をアーバーに対して毎回取付けおよび取外しをす
る方式がある。For example, there is a method in which an arbor is introduced into a pilot hole of a workpiece each time an individual back cutting is performed, and a rotary tool (hereinafter referred to as a tool) is attached to and detached from the arbor on the back side of the arbor each time.
これは切削工具の外径が被削材の下穴の内径よりも大き
い為にアーバーに装着した儂では裏側の加工位置まで切
削工具を導通出来ないからである。This is because the outside diameter of the cutting tool is larger than the inside diameter of the pilot hole in the workpiece, so when it is attached to the arbor, it cannot be conducted to the processing position on the back side.
この方式は工具の着脱、の手間が掛るだけでなく、被削
材の裏側に工具着脱の余地が無い場合には実施出来ない
。This method not only requires time and effort to attach and detach the tool, but also cannot be implemented if there is no room for attaching and detaching the tool on the back side of the workpiece.
切削作業の自動化も勿論不可能である。Of course, automation of cutting work is also impossible.
又、他の例ではアーパーあるいは工具軸の先端に刃先部
を蝶番か又はその他の方法で接合し、その外径を伸縮出
来る様に形成した切削工具の方式がある。Another example is a cutting tool in which the cutting edge is joined to the tip of the aperture or tool shaft using a hinge or other method, and the outer diameter of the cutting tool is formed so that it can expand and contract.
この方式は工具の刃先部を被削材の裏側まで導通する際
にはその外径を縮少し、切削時には所定寸法まで拡大す
るもので前例の様に毎回工具を着脱する手間を省略する
ものである。This method reduces the outer diameter of the cutting edge of the tool when conducting it to the back side of the workpiece, and expands it to the specified size during cutting, eliminating the need to attach and detach the tool each time as in the previous example. be.
然しこの方式では刃先の剛性が弱い為に切削条件に制限
があって切削能率が悪く、それに加えて工具寿命も良く
ないと云われている。However, in this method, the rigidity of the cutting edge is weak, which limits the cutting conditions, resulting in poor cutting efficiency and, in addition, it is said that the tool life is also poor.
本考案は上記の事情に鑑みて威されたもので、その目的
は刃先の剛性を高めた構成で、且つ切削能率の向上をは
かる裏ざぐり用回転工具を提供するにある。The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a rotary tool for countersinking which has a structure with increased rigidity of the cutting edge and which improves cutting efficiency.
さて本考案の裏ざくり工具は第１図に示す通りである。Now, the underside chamfering tool of the present invention is as shown in FIG.
一般にざくり切削には工具系を回転する転削工具即ちフ
ライスと被削材系を回転する施削工具即ちバイトとがあ
る。In general, counterboring involves a milling tool that rotates a tool system, that is, a milling cutter, and a cutting tool that rotates a workpiece system, that is, a cutting tool.
本考案は前者即ち転削工具に関するものであって、第１
図はその一例を示すものである。The present invention relates to the former, that is, a milling tool;
The figure shows an example.
図中の１は工作機械の回転主軸端、２は工具ホールグー
でその軸心を機械の回転中心に合わせて取付けられる。In the figure, 1 is the rotating spindle end of the machine tool, and 2 is the tool hole, which is installed with its axis aligned with the rotation center of the machine.
３は本題の裏座ぐり用フライスの柄部であって、工具ホ
ールグーの回転中心軸に対して偏心させて取付けられる
。Reference numeral 3 denotes the handle of the milling cutter for back counterboring, which is mounted eccentrically with respect to the central axis of rotation of the tool hole.
工具の柄部は通常ストレートな円柱形であって、第２図
に示す通りその断面は円形である。The handle of the tool is usually straight and cylindrical, with a circular cross section as shown in FIG.
５は工具の首部であってその断面形状は第３図に示す如
く扁平な凸レンズ状をな腰円柱の片側の余肉を円弧状に
削り取った如く形成される。Reference numeral 5 denotes the neck of the tool, and its cross-sectional shape is shaped like a flat convex lens, as shown in FIG. 3, and is formed by cutting off the excess thickness on one side of a waist cylinder into an arc shape.
この首部は切削作業時に被削材の下穴を突抜ける必要が
ある為に一般の切削工具よりも長が目に作られる。This neck is made longer than a typical cutting tool because it needs to pass through a pilot hole in the workpiece during cutting.
７は工具の切刃部であって首部の先端に於いてそのレン
ズ状断面の円弧の面から直角に突出して形成される。Reference numeral 7 denotes a cutting edge portion of the tool, which is formed at the tip of the neck portion to protrude at right angles from the arcuate surface of the lens-shaped cross section.
この刃先部は１枚刃であって突出した部分の内端縁に主
切刃８をもち、外周縁に外周切刃縁９をもつ。This cutting edge portion is a single blade, and has a main cutting edge 8 on the inner edge of the protruding portion, and an outer peripheral cutting edge 9 on the outer periphery.
ここに主切刃と云うのは切削時の工具の送り方向側の切
刃、外周切刃縁と云うのは送り方向に平行する側の切刃
と定義する。Here, the main cutting edge is defined as the cutting edge on the feeding direction side of the tool during cutting, and the outer peripheral cutting edge is defined as the cutting edge on the side parallel to the feeding direction.
また、第６図で示す１は外周切刃縁９までの切刃長さで
あり、ｔは首部５の厚さである。Further, 1 shown in FIG. 6 is the length of the cutting edge up to the outer cutting edge 9, and t is the thickness of the neck portion 5.
第４図は切刃部７の断面を示す。FIG. 4 shows a cross section of the cutting edge 7.
１１は本フライス柄部の中心軸、１２は機械主軸の回転
中心軸を示す。Reference numeral 11 indicates the central axis of the handle of the present milling cutter, and 12 indicates the rotation center axis of the main shaft of the machine.
前述した如く、本フライスは機械主軸に対して、その回
転中心より偏心させて取付けられるので、この両者の中
心軸線を図中に特記してその状況を説明するものである
。As mentioned above, this milling cutter is mounted eccentrically from the center of rotation of the main shaft of the machine, so the central axes of both are specifically noted in the drawings to explain the situation.
次に本考案の工具による作業状況について第５図および
第６図によって説明する。Next, working conditions using the tool of the present invention will be explained with reference to FIGS. 5 and 6.
この両図は何れも被削材の裏側から見た時の裏ざぐり作
業の状況を示す。Both figures show the situation of counterbore work when viewed from the back side of the workpiece.
第５図は切削作業の前後に切刃部を被削材の下穴中を導
通ずるときの状況を示す。FIG. 5 shows the situation when the cutting blade is passed through the prepared hole of the workpiece before and after the cutting operation.
７は工具の切刃部、１３は被削材、１４はその下穴の内
径、１５は裏ざぐりされた部分の内径を示す。7 is the cutting edge of the tool, 13 is the workpiece, 14 is the inner diameter of the prepared hole, and 15 is the inner diameter of the counterbore.
本図に見られる通り工具の首部５の背面側円弧５ａと切
刃外周縁９を含む切刃部の外径は略被削材の下穴に近い
円周上にあって、その形状及び寸法は導通の為の許容最
大限になっている。As seen in this figure, the outer diameter of the cutting edge, including the back side circular arc 5a of the neck 5 of the tool and the cutting edge outer periphery 9, is approximately on the circumference of the prepared hole of the workpiece, and its shape and dimensions is the maximum allowable for continuity.
第６図は第５図で示される如く導通された工具を、工具
と被剛材の関係位置を変えて、工具切刃部を裏ざぐり切
削位置にセットした状況を示す。FIG. 6 shows a situation in which the electrically connected tool as shown in FIG. 5 is set in a counterbore cutting position by changing the relative position between the tool and the rigid material.
この場合は工具首部５の内面側円弧５ｂが被削材下穴の
内径に接する程までに形状、寸法共に許容最大限になっ
ている。In this case, both the shape and dimensions are at the maximum allowable extent to the extent that the inner circular arc 5b of the tool neck 5 touches the inner diameter of the prepared hole of the workpiece.
故に第５図及び第６図を組合せて見ると、本考案による
切削工具の首部の断面形状を被削材下穴の内径に略等し
い２つの円弧によって凸レンズ状に形成すれば許容され
る最大面積が得られることとなる。Therefore, when looking at FIGS. 5 and 6 in combination, it is found that if the cross-sectional shape of the neck of the cutting tool according to the present invention is formed into a convex lens shape by two circular arcs that are approximately equal to the inner diameter of the prepared hole of the workpiece, the maximum allowable area will be will be obtained.
従って、首部５の断面積の増加がはかられ、ねじり剛性
を高めることができる。Therefore, the cross-sectional area of the neck portion 5 can be increased, and the torsional rigidity can be increased.
すなわち、刃先の剛性が高まり切削能率の向上、それに
加えて工具寿命も良くなる。In other words, the rigidity of the cutting edge is increased, cutting efficiency is improved, and tool life is also improved.
合板りに被削材下穴径をＤｍとし、裏ざぐり部分の内径
をＩ）’ｉｎとして、工具首部の許容最大厚みを計算す
ると次の如くなる。The maximum allowable thickness of the tool neck is calculated as follows, assuming that the diameter of the prepared hole in the plywood workpiece is Dm, and the inner diameter of the counterbore part is I)'in.
即ち、計算を簡単にするため工具切刃部の外径を被削材
下穴径と同一の：Ｄｒｒｒｍとすれば、突き出した分の
切刃長さ１は１（Ｄ′−Ｄ）となるから、首部の厚さは
ｔ＃Ｄ−１＝Ｄ−上（Ｄ’−Ｄ） ’２
（３Ｄ−Ｄ’） ｗｎとなる。In other words, to simplify calculations, if the outer diameter of the tool cutting edge is the same as the work material prepared hole diameter: Drrrm, the protruding cutting edge length 1 will be 1 (D'-D). Therefore, the thickness of the neck is t#D-1=D-upper (D'-D) '2 (3D-D') wn.
また、第５図に示す本フライスの下穴導通位置から第６
図に示す作業位置へＤ’−ＤＴａ
の移動量は となる。Also, from the pilot hole conduction position of this milling machine shown in Fig. 5,
The amount of movement of D'-DTa to the working position shown in the figure is as follows.
この様にして、許容される最強度の裏ざぐり工具が得ら
れる訳である。In this way, the strongest permissible counterboring tool is obtained.
この様な一体化構造の工具は容易にＮＣ機その他による
自動作業にも適用出来るので、在来に比べて数倍の能率
が得られる。A tool with such an integrated structure can be easily applied to automatic work using an NC machine or the like, so it can be several times more efficient than conventional tools.
第１図は本考案の裏ざぐり用切削工具を示した全体図。
第２図は第１図のＡ−Ａ断面図、第３図は第１図のＢ−
Ｂ断面図、第４図は第１図のＣ−Ｃ断面図、第５図は工
具を被削材の下穴に導通ずる状況を示した図、第６図は
工具を裏ざぐり位置に位置決めした状況を示した図。
図において１・・・・・・工作機械の回転主軸端、３・
・・・・・柄部、５・・・・・・首部、７・・・・・・
切刃部。FIG. 1 is an overall view showing the cutting tool for counterbore of the present invention. Figure 2 is a sectional view taken along line A-A in Figure 1, and Figure 3 is a cross-sectional view taken along line B-- in Figure 1.
B sectional view, Fig. 4 is a C-C sectional view of Fig. 1, Fig. 5 is a diagram showing the situation in which the tool is passed through the prepared hole of the workpiece, and Fig. 6 is the position of the tool in the counterbore position. A diagram showing the situation. In the figure, 1... the rotating spindle end of the machine tool, 3...
...Handle, 5...Neck, 7...
Cutting blade part.
Claims (1)
の切刃部は首部から工具の軸線に対して直角方向に突出
して形成され、且つ前記工具の首部は２つの円弧を向き
合わせて成る軸方向断面凸レンズ状の断面形状に形成さ
れ、且つ首部が柄部の中心軸に対して偏位して形成され
た構成を持つ裏ざぐり用回転工具。In a tool consisting of a handle, a neck, and a cutting edge, the cutting edge of the tool is formed to protrude from the neck in a direction perpendicular to the axis of the tool, and the neck of the tool is formed by two circular arcs facing each other. A rotary tool for counterbore having a cross-sectional shape of a convex lens in the axial direction, and a neck portion deviated from the central axis of the handle portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5273681U JPS6031862Y2 (en) | 1981-04-13 | 1981-04-13 | Rotary tool for counterbore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5273681U JPS6031862Y2 (en) | 1981-04-13 | 1981-04-13 | Rotary tool for counterbore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57166617U JPS57166617U (en) | 1982-10-20 |
| JPS6031862Y2 true JPS6031862Y2 (en) | 1985-09-24 |
Family
ID=29849406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5273681U Expired JPS6031862Y2 (en) | 1981-04-13 | 1981-04-13 | Rotary tool for counterbore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031862Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202239821U (en) * | 2011-09-27 | 2012-05-30 | 上海宏功机械科技有限公司 | Eccentric powerful counter-scrape counter-boring combined tool |
-
1981
- 1981-04-13 JP JP5273681U patent/JPS6031862Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57166617U (en) | 1982-10-20 |
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