JP3036382B2 - Tool mounting structure - Google Patents
Tool mounting structureInfo
- Publication number
- JP3036382B2 JP3036382B2 JP6324287A JP32428794A JP3036382B2 JP 3036382 B2 JP3036382 B2 JP 3036382B2 JP 6324287 A JP6324287 A JP 6324287A JP 32428794 A JP32428794 A JP 32428794A JP 3036382 B2 JP3036382 B2 JP 3036382B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting tool
- tool
- mounting structure
- wedge
- holder
- 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 - Lifetime
Links
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、仕上用バイト等の取付
構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a finishing bit or the like.
【０００２】[0002]
【従来の技術】自動車のシリンダヘッドにおけるバルブ
シート仕上加工の一方法として、例えば図４ないし図６
に示すようなものがある。2. Description of the Related Art As one method of finishing valve seats in a cylinder head of an automobile, for example, FIGS.
There is something like that shown in
【０００３】これによれば、バルブフィニッシャー等に
おけるカッター１の筒状のホルダー部２には、シリンダ
ヘッド３のポート開口部に嵌着されたバルブシート４の
仕上加工を行うための先端角違いの３種類の超硬バイト
５が円周方向へ所定間隔離間してそれぞれ取り付けられ
る。According to this, a cylindrical holder 2 of a cutter 1 in a valve finisher or the like has a different tip angle for finishing a valve seat 4 fitted in a port opening of a cylinder head 3. Three types of carbide cutting tools 5 are attached at predetermined intervals in the circumferential direction.
【０００４】即ち、バルブシート４は、円錐角θ1 ，θ
2 ，θ3 の異なる三つのシート面６ａ，６ｂ，６ｃを有
し、これらを高速で回転しながら押付け加工により仕上
げる前記３種類の超硬バイト５が前記ホルダー部２の外
周にそれぞれくさび７を用いて締付・固定されるのであ
る。That is, the valve seat 4 has cone angles θ 1 , θ
2, theta 3 different three seat surface 6a, 6b, has 6c, the three kinds of cemented carbide 5 wherein each wedge 7 to the outer periphery of the holder portion 2 to finish the work pressing while rotating them at high speed It is then tightened and fixed.
【０００５】尚、図４中８はバルブガイド仕上用のリー
マで、バルブシート４の仕上加工後にシリンダヘッド３
に組み付けられた図示しないバルブガイドに向けて前進
され、そのバルブ摺動面の仕上加工を行うものである。Reference numeral 8 in FIG. 4 denotes a reamer for finishing the valve guide.
The valve is advanced toward a valve guide (not shown) assembled in the above, and finishes the sliding surface of the valve.
【０００６】[0006]
【発明が解決しようとする課題】ところで、このような
従来のバイト５の取付構造にあっては、くさび７を用い
てかなり強固に締付・固定されてはいるが、ワークとの
干渉の問題によりくさび７による締付・固定部から切刃
部までが形状的に細く、オーバーハングしている（図６
参照）。By the way, in such a conventional structure for mounting the cutting tool 5, although the wedge 7 is used, it is tightened and fixed quite firmly, but there is a problem of interference with the work. The portion from the fastening / fixing portion by the wedge 7 to the cutting edge portion is thin in shape and is overhanging (FIG. 6).
reference).
【０００７】そのため、前記三つのシート面６ａ，６
ｂ，６ｃの同時加工による切削抵抗増大に加えて、バイ
ト先端側の剛性が十分にとれないことにより、振動によ
る切刃部のチッピングが生じる等で工具の寿命が短縮さ
れるという問題点があった。For this reason, the three seat surfaces 6a, 6
In addition to the increase in cutting resistance due to the simultaneous machining of b and 6c, the lack of sufficient rigidity at the tip end of the cutting tool causes a problem that the life of the tool is shortened due to the occurrence of chipping of the cutting edge portion due to vibration. Was.
【０００８】本発明は前記状況に鑑みてなされたもの
で、工具寿命の向上が図れるバイトの取付構造を提供す
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a tool mounting structure that can improve tool life.
【０００９】[0009]
【課題を解決するための手段】前記目的を達成するため
の本発明に係るバイトの取付構造は、ホルダへくさびを
利用して締付・固定されるバイトの取付構造であって、
前記バイトのくさび係合面と反対側のホルダ取付面に、
前記締付・固定の際にバイトが全体的に撓み得るよう
に、バイト先端側からバイト基端側に向けて下り勾配と
なる傾斜面を形成したことを特徴とする。また、前記ホ
ルダ取付面のバイト基端側に傾斜面より高いストレート
面を有すると、撓みが助長され、好適である。また、前
記バイトはくさびによる締付・固定部から切刃部までが
形状的に細く、オーバハングしているシリンダヘッドの
バルブシート仕上用バイトであると、より大きな効果が
得られ、好適である。A tool mounting structure according to the present invention for achieving the above object is a tool mounting structure which is fastened and fixed to a holder by using a wedge,
On the holder mounting surface opposite to the wedge engaging surface of the cutting tool,
An inclined surface having a downward slope from the cutting tool tip side to the cutting tool base end side is formed so that the cutting tool can be bent as a whole during the tightening and fixing. It is preferable that a straight surface higher than the inclined surface is provided on the base end side of the holder mounting surface on the side of the cutting tool, so that bending is promoted. In addition, it is preferable that the bite is a bite for finishing a valve seat of a cylinder head that is overhanged from the part that is tightened / fixed by a wedge to the cutting edge portion and that is overhanging.
【００１０】[0010]
【作用】本発明に係るバイトの取付構造によれば、撓み
による復元力の増大でバイト先端側のビビリ振動が抑制
される。According to the cutting tool mounting structure of the present invention, chatter vibration on the tip end side of the cutting tool is suppressed by increasing the restoring force due to the bending.
【００１１】[0011]
【実施例】以下、本発明に係るバイトの取付構造の一実
施例を添付図面に基づいて説明する。図１は本取付構造
の正面図、図２は図１の下面図である。なお、これらの
図において、全体的な構成は図４ないし図６と同様なの
で、これらを参照して重複する説明は省略する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a tool mounting structure according to the present invention. FIG. 1 is a front view of the mounting structure, and FIG. 2 is a bottom view of FIG. In these figures, the overall configuration is the same as in FIGS. 4 to 6, and a duplicate description will be omitted with reference to these figures.
【００１２】図１及び図２に示すように、カッター１
（図４参照）の筒状のホルダー部２には、下端開口のバ
イト取付溝２ａが形成され、このバイト取付溝２ａにく
さび７を利用してバイト１０がオーバーハング状態で締
付・固定される。図中９がその締付ネジである。なお、
図中１１はバイト１０の切刃を示し、１２はバイト１０
の出入り調整ネジである。As shown in FIG. 1 and FIG.
In the cylindrical holder portion 2 (see FIG. 4), a bite mounting groove 2a having a lower end opening is formed, and the bite 10 is tightened and fixed in an overhanging state by using a wedge 7 in the bite mounting groove 2a. You. Reference numeral 9 in the figure denotes the fastening screw. In addition,
In the figure, 11 indicates the cutting edge of the cutting tool 10, and 12 indicates the cutting edge of the cutting tool 10.
In / Out adjustment screw.
【００１３】前記バイト１０は、くさび係合面１０ｃと
反対側のホルダ取付面に、前記締付・固定の際にバイト
１０が全体的に撓み得るように、バイト先端側からバイ
ト基端側に向けて０．５°（これは、切削抵抗の大きさ
で決定）の下り勾配となる傾斜面１０ａが形成されてな
る。The cutting tool 10 is mounted on a holder mounting surface opposite to the wedge engaging surface 10c from the cutting tool tip side to the cutting tool base end side so that the cutting tool 10 can be bent as a whole during the tightening and fixing. An inclined surface 10a having a downward inclination of 0.5 ° (this is determined by the magnitude of the cutting resistance) is formed.
【００１４】本実施例では、前記ホルダ取付面のバイト
基端側に傾斜面１０ａより高いストレート面（基準面）
１０ｂが設けられ、これにより、バイト１０がより撓み
得るようになっている。In this embodiment, a straight surface (reference surface) higher than the inclined surface 10a is provided at the base end side of the holder mounting surface.
10b is provided, so that the cutting tool 10 can be more flexed.
【００１５】このように構成された取付構造の作用を図
３を用いて説明する。バルブシート４の三つのシート面
６ａ，６ｂ，６ｃ（図５参照）の同時仕上加工時に、バ
イト先端側にビビリ振動が発生した場合、先ず通常のバ
イト形状にあっては、図３の（ａ）に示すように、バイ
ト５の先端側が振動によりδ1 だけ撓むと、これを元に
戻そうとする力Ｆ（δ1 ）が発生する。The operation of the thus-configured mounting structure will be described with reference to FIG. When chatter vibration occurs on the tip end side of the cutting tool during simultaneous finishing of the three seat surfaces 6a, 6b, 6c (see FIG. 5) of the valve seat 4, first, in the case of the normal cutting tool shape, FIG. as shown in), when the tip end of the byte 5 is bent by [delta] 1 by the vibration, the force F ([delta] 1 for returning based on this) is generated.
【００１６】これが、本実施例のバイト形状では、図３
の（ｂ）に示すように、傾斜面１０ａにより予め撓ませ
た量δ2 が加算され、力Ｆ（δ1 ＋δ2 ）が発生するこ
とになる。当然、Ｆ（δ）∝δであるから、 Ｆ
（δ1 ）＜Ｆ（δ1 ＋δ2 ）となる。This is the same as the cutting tool shown in FIG.
(B), the amount δ 2 previously bent by the inclined surface 10 a is added, and a force F (δ 1 + δ 2 ) is generated. Of course, since F (δ) ∝δ, F
(Δ 1 ) <F (δ 1 + δ 2 ).
【００１７】即ち、振動により同じ量だけバイト１０の
先端側がホルダー部２から浮き上がっても、本実施例の
バイト形状の方が元に戻そうとする力が大きいため、ビ
ビリにくい。これにより、切刃１１部が浮き上がった不
安定な状態で削る時間が短くなるのである。That is, even if the tip of the cutting tool 10 is lifted from the holder 2 by the same amount due to the vibration, the cutting tool of the present embodiment has a greater force to return to its original state, so that it is less likely to chatter. As a result, the cutting time in the unstable state in which the cutting blade 11 is raised is reduced.
【００１８】別の表現をすれば、バイト１０の先端側を
ホルダー部２から引き離そうとする力が何らかの原因で
働いた時、同じ大きさの力であれば、バイト１０の先端
側の浮き上がり量δ1 が小さくなるため、ビビリ振動が
発生しにくくなるのである。In other words, when the force for separating the tip of the cutting tool 10 from the holder 2 acts for some reason, if the force has the same magnitude, the lifting amount δ of the cutting tool 10 on the tip side is considered. Since 1 becomes smaller, chatter vibration is less likely to occur.
【００１９】[0019]
【発明の効果】本発明に係るバイトの取付構造によれ
ば、バイトのくさび係合面と反対側のホルダ取付面に、
前記締付・固定の際にバイトが全体的に撓み得るよう
に、バイト先端側からバイト基端側に向けて下り勾配と
なる傾斜面を形成したので、撓みによる復元力の増大で
バイト先端側のビビリ振動が抑制され、工具寿命の大幅
な向上が図れる。According to the bite mounting structure of the present invention, the holder mounting surface opposite to the wedge engaging surface of the bite is
Since the cutting tool is formed so as to be able to bend as a whole at the time of tightening and fixing, the inclined surface is formed so as to have a downward slope from the cutting tool tip side to the cutting tool base end side. Chatter vibration is suppressed, and the tool life can be greatly improved.
【図１】本発明に係るバイトの取付構造の一実施例を示
す正面図である。FIG. 1 is a front view showing one embodiment of a tool mounting structure according to the present invention.
【図２】同じく下面図である。FIG. 2 is a bottom view of the same.
【図３】同じく作用の比較説明図である。FIG. 3 is a comparative explanatory view of the operation.
【図４】バルブシートの仕上加工の状態図である。FIG. 4 is a state diagram of a finishing process of the valve seat.
【図５】同じく図４のＡ−Ａ線断面図である。FIG. 5 is a sectional view taken along line AA of FIG. 4;
【図６】超硬バイトの形状説明図である。FIG. 6 is an explanatory diagram of the shape of a carbide cutting tool.
１ カッター ２ ホルダー部 ３ シリンダヘッド ４ バルブシート ７ くさび １０ バイト １０ａ 傾斜面 １０ｂ ストレート面 １０ｃ くさび係合面 DESCRIPTION OF SYMBOLS 1 Cutter 2 Holder part 3 Cylinder head 4 Valve seat 7 Wedge 10 bytes 10a Inclined surface 10b Straight surface 10c Wedge engagement surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−198705（ＪＰ，Ａ) 特開 昭49−16994（ＪＰ，Ａ) 実開 平３−29203（ＪＰ，Ｕ) 実開 平１−132304（ＪＰ，Ｕ) 実開 昭49−130483（ＪＰ，Ｕ) 米国特許4172398（ＵＳ，Ａ) 米国特許4080854（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23B 29/00 B23B 27/00 B23B 29/04 B23B 29/02 B23B 29/14 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-198705 (JP, A) JP-A-49-16994 (JP, A) JP-A-3-29203 (JP, U) JP-A-1 132304 (JP, U) U.S.A. 49-130483 (JP, U) U.S. Pat. No. 4,172,398 (US, A) U.S. Pat. No. 4,080,854 (US, A) (58) Fields investigated (Int. Cl. 7 , DB name) B23B 29/00 B23B 27/00 B23B 29/04 B23B 29/02 B23B 29/14
Claims (3)
れるバイトの取付構造であって、前記バイトのくさび係
合面と反対側のホルダ取付面に、前記締付・固定の際に
バイトが全体的に撓み得るように、バイト先端側からバ
イト基端側に向けて下り勾配となる傾斜面を形成したこ
とを特徴とするバイトの取付構造。1. A mounting structure for a tool which is tightened and fixed to a holder by using a wedge, wherein the tool is attached to a holder mounting surface opposite to a wedge engaging surface of the tool when the tightening and fixing is performed. A cutting tool mounting structure, characterized in that a slanted surface is formed so as to be inclined downward from the cutting tool tip side toward the cutting tool base end side so that the cutting tool can be entirely bent.
面より高いストレート面を有する請求項１記載のバイト
の取付構造。2. The bite mounting structure according to claim 1, wherein a straight surface higher than an inclined surface is provided at a base end side of the bite of the holder mounting surface.
から切刃部までが形状的に細く、オーバハングしている
シリンダヘッドのバルブシート仕上用バイトである請求
項１又は２記載のバイトの取付構造。3. The cutting tool according to claim 1, wherein the cutting tool is a bite for finishing a valve seat of an overhanging cylinder head from a part which is narrowed in a shape from a fastening part and a fixing part by a wedge to a cutting edge part. Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6324287A JP3036382B2 (en) | 1994-12-27 | 1994-12-27 | Tool mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6324287A JP3036382B2 (en) | 1994-12-27 | 1994-12-27 | Tool mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08174312A JPH08174312A (en) | 1996-07-09 |
| JP3036382B2 true JP3036382B2 (en) | 2000-04-24 |
Family
ID=18164128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6324287A Expired - Lifetime JP3036382B2 (en) | 1994-12-27 | 1994-12-27 | Tool mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3036382B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605411B (en) * | 2020-12-03 | 2021-12-10 | 株洲华锐精密工具股份有限公司 | Grooving tool |
-
1994
- 1994-12-27 JP JP6324287A patent/JP3036382B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08174312A (en) | 1996-07-09 |
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