JP3070900B2 - Tool with blade diameter adjustment mechanism - Google Patents
Tool with blade diameter adjustment mechanismInfo
- Publication number
- JP3070900B2 JP3070900B2 JP25322394A JP25322394A JP3070900B2 JP 3070900 B2 JP3070900 B2 JP 3070900B2 JP 25322394 A JP25322394 A JP 25322394A JP 25322394 A JP25322394 A JP 25322394A JP 3070900 B2 JP3070900 B2 JP 3070900B2
- Authority
- JP
- Japan
- Prior art keywords
- tool
- cutting
- radial
- adjusting mechanism
- rotary 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えばリーマ切刃の径
が調整可能な刃具径調整機構を備えた工具の改良に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a tool having a cutting tool diameter adjusting mechanism capable of adjusting the diameter of a reamer cutting blade, for example.
【０００２】[0002]
【従来の技術】従来、加工用バイトを径方向に拡縮自在
にした中ぐり工具として、本出願人は例えば実開平４−
５４６０４号のような技術を開示している。この技術は
回転ホルダとしての中空スピンドルの筒内に進退自在で
且つカム部を備えたバイト駆動軸を設ける一方、中空ス
ピンドルの外周部に切刃を備えた刃具の一端側を片持式
に固定し、バイト駆動軸を進退動させることで、カム部
の作用で刃具の自由端側を径方向に拡縮させるようにし
ている。2. Description of the Related Art Conventionally, as a boring tool in which a machining bit can be freely expanded and contracted in the radial direction, the present applicant has disclosed, for example,
No. 54604 is disclosed. In this technology, a cutting tool provided with a cutting blade on the outer periphery of the hollow spindle is fixed in a cantilever manner while a cutting tool provided with a cutting edge on the outer periphery of the hollow spindle is fixed inside a hollow spindle cylinder as a rotary holder. By moving the cutting tool shaft forward and backward, the free end side of the cutting tool is radially expanded and contracted by the action of the cam portion.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記技
術のように刃具の一端側を片持式に支持して拡縮させる
場合は、刃具の剛性が不足がちになり、例えば切削抵抗
の増減によって径方向の張出し量が変化して加工面粗度
に悪影響が出る虞れがある。However, in the case where one end of the cutting tool is supported in a cantilever manner and expanded or contracted as in the above technique, the rigidity of the cutting tool tends to be insufficient. Overhang may change and adversely affect the machined surface roughness.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
本発明は、回転ホルダの筒内でテーパコーン部材を進退
動させ、この進退動にて回転ホルダに取り付けた径方向
調整部材を径方向に拡縮させる刃具径調整機構を備えた
工具において、径方向調整部材の長手方向の両端部を回
転ホルダに固定し、これら固定部の内側に径方向の変形
を容易にする薄肉部を形成するとともに、長手方向の略
中央部に切削切刃を設けた。そして、径方向調整部材の
薄肉部を、板厚中間部に形成される貫通孔を上下に挟む
上壁と下壁にて形成した。また、この上壁と下壁を波形
に形成した。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention moves a taper cone member forward and backward in a cylinder of a rotary holder, and moves a radial adjusting member attached to the rotary holder in the radial direction by the forward and backward movement. In a tool having a blade diameter adjusting mechanism for expanding and contracting, while fixing both ends in the longitudinal direction of the radial direction adjusting member to a rotary holder, forming a thin portion inside these fixed portions to facilitate radial deformation, A cutting edge was provided at a substantially central portion in the longitudinal direction. And the thin part of the radial direction adjustment member was formed by the upper wall and the lower wall which vertically sandwiched the through-hole formed in the middle part of board thickness. Further, the upper wall and the lower wall were formed in a waveform.
【０００５】更に、切削切刃をリーマ切刃とし、このリ
ーマ切刃から円周方向に沿って所定角度位置にガイド部
材を設けるとともに、このガイド部材をテーパコーン部
材の進退動によって径方向に拡縮自在にした。[0005] Further to the cutting edge as the reamer cutting edges, scaling provided with a guide member at a predetermined angular position in the circumferential direction from the reamer cutting edge, the guide member in the radial direction by the forward and backward movement of the tapered cone member I made it freely.
【０００６】[0006]
【作用】径方向調整部材の両端部を回転ホルダに固定す
るとともに、径方向調整部材の中間部をテーパコーン部
材に当接させ、テーパコーン部材の進退動にて中間部の
径方向に対する押圧力を変化させ、同部の撓み量を変化
させる。この際、両端部を固定していることから中間撓
み部の剛性が高まり、同部に設けた切削切刃の加工が安
定する。一方、両端を固定することで径方向調整部材が
変形しにくくなるため、固定部の内側部に薄肉部を設け
径方向に変形し易くする。また、この薄肉部を板厚中間
部に設けた貫通孔にて形成すれば、貫通孔を上下に挟む
上壁と下壁によって回転方向の剛性が確保され、回転方
向には変形しにくく且つ径方向のみ変形しやすくなる。
そして、この上壁と下壁を波形に形成して伸び縮みを容
易にし、径方向の変形を一層容易にする。[Function] While fixing both ends of the radial adjusting member to the rotary holder, the intermediate portion of the radial adjusting member is brought into contact with the tapered cone member, and the pressing force of the intermediate portion in the radial direction is changed by the reciprocating movement of the tapered cone member. To change the amount of deflection of the portion. At this time, since the both ends are fixed, the rigidity of the intermediate bending portion is increased, and the processing of the cutting edge provided in the portion is stabilized. On the other hand, fixing the both ends makes it difficult for the radial adjustment member to be deformed. Therefore, a thin portion is provided inside the fixed portion to facilitate deformation in the radial direction. Further, if this thin portion is formed by a through hole provided in the middle portion of the plate thickness, rigidity in the rotating direction is secured by the upper wall and the lower wall sandwiching the through hole up and down, and it is difficult to be deformed in the rotating direction and the diameter is reduced. It becomes easy to deform only in the direction.
Then, the upper wall and the lower wall are formed in a corrugated shape to facilitate expansion and contraction, and further facilitate radial deformation.
【０００７】また、切削切刃をリーマ切刃とし、円周方
向に沿ってガイド部材を設ければ、例えば精度の良い１
枚刃のリーマ工具とすることも出来る。[0007] Also, the cutting edge as the reamer cutting edges, by providing the guide member along the circumferential direction, a good example accurate 1
It can be a single-blade reaming tool.
【０００８】[0008]
【実施例】本発明の実施例について添付した図面に基づ
き説明する。図１は本発明の刃具径調整機構を備えた工
具全体の縦断面図、図２は図１のＡ−Ａ線断面図、図３
は刃具径調整機構の要部拡大図である。図１に示すよう
に、本発明の刃具径調整機構を備えた工具１は、実施例
ではシリンダブロックＷの複数のクランクシャフト軸受
穴を仕上加工する複合工具として構成され、例えば軸方
向に離間して配設した４ヵ所の仕上バイト２…（…は複
数を示す。）と、これに隣接する４ヵ所（図では１ヵ所
のみ示す。）のリーマ切刃３を備えている。An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of the entire tool provided with the cutting tool diameter adjusting mechanism of the present invention, FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is an enlarged view of a main part of the blade diameter adjusting mechanism. As shown in FIG. 1, a tool 1 having a blade diameter adjusting mechanism of the present invention is configured as a composite tool for finishing a plurality of crankshaft bearing holes of a cylinder block W in an embodiment, and is, for example, axially separated. (... indicates a plurality) and four reaming cutting edges 3 (only one is shown in the figure) adjacent thereto.
【０００９】またこの工具１には、不図示のスピンドル
装置から回転駆動力が伝達される筒状の回転ホルダ４
と、この回転ホルダ４の筒内に進退動自在に挿入される
テーパコーン部材としての調整ロッド５が設けられてお
り、この調整ロッド５の基端側にはピストン６が連結さ
れるとともに、このピストン６を収容せしめたシリンダ
室の前方側には、皿バネ或いはコイルスプリング等のピ
ストン戻しスプリング７が内装され、後方側のシリンダ
室には切削油供給路８を連通させてピストン６作動用の
切削油を供給するようにしている。すなわち切削油を供
給すると、切削油圧にてピストン戻しスプリング７力に
抗してピストン６を押込み、調整ロッド５を図中左方に
移動させる。The tool 1 has a cylindrical rotary holder 4 to which a rotational driving force is transmitted from a spindle device (not shown).
And an adjusting rod 5 as a tapered cone member which is inserted into the cylinder of the rotary holder 4 so as to be able to move forward and backward. A piston 6 is connected to the proximal end of the adjusting rod 5 and A piston return spring 7 such as a disc spring or a coil spring is provided at the front side of the cylinder chamber in which the piston 6 is accommodated. I am trying to supply oil. That is, when the cutting oil is supplied, the piston 6 is pushed in against the force of the piston return spring 7 by the cutting oil pressure, and the adjustment rod 5 is moved to the left in the drawing.
【００１０】又、ピストン戻しスプリング７を収容した
前方シリンダ室には、図２に示すように回転ホルダ４を
斜めに貫通するエア通路９、９を設けており、同シリン
ダ室の拡縮に伴う内部のエアの吸排気を行わしめるとと
もに、このエア通路９の傾斜方向を、回転ホルダが矢視
方向に回転した時に切り屑、切削油等が入り込みにくい
方向にしている。In the front cylinder chamber accommodating the piston return spring 7, there are provided air passages 9, 9 obliquely penetrating the rotary holder 4, as shown in FIG. And the air passage 9 is inclined so that chips, cutting oil, and the like are hard to enter when the rotary holder rotates in the direction of the arrow.
【００１１】また、図１のピストン６の後面側にはガイ
ド部１０が設けられ、このガイド部１０はシャンク部１
１前面のガイド穴１１ａによって摺動自在に軸受される
とともに、このガイド部１０の中心とピストン６の中心
を貫通する切削油通路１２を前記切削油供給路８に連通
せしめている。そして、この切削油通路１２は、後述す
る前方の切削油経路に連通し、切削油を前方の加工部及
び摺動部等に導くようにしている。また、この切削油通
路１２には後方側のシリンダ室に連通するエア抜き路２
６を設けており、切削油の供給を止めてピストン戻しス
プリング７力でピストン６が後方に戻された際、同シリ
ンダ室内部のエアをエア抜き路２６から逃がすことが出
来るようにしている。A guide portion 10 is provided on the rear side of the piston 6 shown in FIG.
A cutting oil passage 12 which is slidably supported by a guide hole 11a on the front surface and penetrates the center of the guide portion 10 and the center of the piston 6 communicates with the cutting oil supply passage 8. The cutting oil passage 12 communicates with a front cutting oil path, which will be described later, and guides the cutting oil to a front processing portion, a sliding portion, and the like. The cutting oil passage 12 has an air vent passage 2 communicating with the rear cylinder chamber.
When the supply of the cutting oil is stopped and the piston 6 is returned backward by the force of the piston return spring 7, the air inside the cylinder chamber can be released from the air vent path 26.
【００１２】一方、回転ホルダ４の先端側にはパイロッ
ト筒１３がボルト止めされている。このパイロット筒１
３は、装置本体側の軸受１４にて回転自在に軸受けされ
るとともに、軸受１４との潤滑を行うため外周面に切削
油流通用の外周ねじれ溝１５を形成しており、更に筒内
のネジ部１６には、アジャストスクリュー１７が螺合し
ている。そして、このアジャストスクリュー１７の先端
部は調整ロッド５の先端部に当接可能になり、調整ロッ
ド５の前進位置を規制するようにされている。尚、位置
調整が完了した後、アジャストスクリュー１７の位置を
固定するためクランプネジ１８とクランプピース１９を
設けており、クランプネジ１８の締付けによってクラン
プピース１９をアジャストスクリュー１７の側面に圧接
し、クランプするようにしている。尚、クランプピース
１９はアジャストスクリュー１７の外面に損傷を与えな
いように柔らかい金属としている。On the other hand, a pilot cylinder 13 is bolted to the tip end of the rotary holder 4. This pilot tube 1
Numeral 3 is rotatably supported by a bearing 14 on the apparatus main body side, and has an outer peripheral torsion groove 15 for cutting oil circulation on an outer peripheral surface for lubrication with the bearing 14. An adjusting screw 17 is screwed into the portion 16. The distal end of the adjusting screw 17 can be brought into contact with the distal end of the adjustment rod 5 to regulate the advance position of the adjustment rod 5. After the position adjustment is completed, a clamp screw 18 and a clamp piece 19 are provided in order to fix the position of the adjusting screw 17, and the clamp piece 19 is pressed against the side surface of the adjusting screw 17 by tightening the clamp screw 18. I am trying to do it. The clamp piece 19 is made of a soft metal so as not to damage the outer surface of the adjusting screw 17.
【００１３】前記仕上バイト２は回転ホルダ４の外周に
ボルト２１で固定されている。そしてこのバイト２は例
えばＣＢＮ製であり、径方向に位置調整することは出来
ない。The finishing tool 2 is fixed to the outer periphery of the rotary holder 4 with bolts 21. The cutting tool 2 is made of, for example, CBN, and cannot be adjusted in the radial direction.
【００１４】この仕上バイト２の近傍の調整ロッド５に
は、図３に示すように軸方向に沿って外面が傾斜するテ
ーパコーン部５ａ（図１では１ヵ所のみ示す）が設けら
れている。そして、このテーパコーン部５ａの位置に対
応して回転ホルダ４には段付穴４ａが形成され、この段
付穴４ａに径方向調整部材２２が嵌め込まれるように取
り付けられるとともに、その下面ｔが調整ロッド５のテ
ーパコーン部５ａに当接している。そして、径方向調整
部材２２の下面ｔはテーパコーン部５ａのテーパ角とほ
ぼ同じ角度のテーパ面として構成されている。このた
め、調整ロッド５が軸方向に移動してテーパコーン部５
ａの大径部が径方向調整部材２２の下面ｔに当接する
と、径方向調整部材２２は径方向外側に向けて押圧力を
受ける。因みに、テーパコーン部５ａには超硬材を使用
している。The adjusting rod 5 near the finishing tool 2 is provided with a tapered cone portion 5a (only one is shown in FIG. 1) whose outer surface is inclined along the axial direction as shown in FIG. A stepped hole 4a is formed in the rotary holder 4 corresponding to the position of the tapered cone portion 5a. The stepped hole 4a is mounted so that the radial direction adjusting member 22 is fitted therein, and the lower surface t thereof is adjusted. The rod 5 is in contact with the tapered cone portion 5a. The lower surface t of the radial direction adjusting member 22 is formed as a tapered surface having substantially the same angle as the taper angle of the tapered cone portion 5a. For this reason, the adjusting rod 5 moves in the axial direction and the tapered cone portion 5
When the large-diameter portion a contacts the lower surface t of the radial adjustment member 22, the radial adjustment member 22 receives a pressing force radially outward. Incidentally, a cemented carbide material is used for the tapered cone portion 5a.
【００１５】次に径方向調整部材２２の細部について図
５に基づき説明する。ここで、図５は径方向調整部材２
２の斜視図である。径方向調整部材２２は相対的に長さ
及び幅間隔の広い上段部２２ａと、これに比較して長さ
及び幅間隔の狭い下段部２２ｂが一体構成されたもので
あり、上段部２２ａの長手方向の両端部に一対の取付穴
２２ｃ、２２ｃを備えるとともに、各取付穴２２ｃ、２
２ｃの内側近傍に板厚中間部を水平に貫く貫通孔２２
ｄ、２２ｄが設けられている。そして、前記取付穴２２
ｃ、２２ｃには、図３に示すようなボルト２３、２３が
挿入され、回転ホルダ４の段付穴４ａの段差部に固定出
来るようにしている。Next, details of the radial adjusting member 22 will be described with reference to FIG. Here, FIG.
FIG. 2 is a perspective view of FIG. The radial adjustment member 22 is formed by integrally integrating an upper portion 22a having a relatively large length and width interval and a lower portion 22b having a relatively small length and width interval. A pair of mounting holes 22c, 22c are provided at both ends in the direction.
2c, a through hole 22 extending horizontally through the middle part of the thickness near the inner side of 2c.
d and 22d are provided. Then, the mounting hole 22
Bolts 23, 23 as shown in FIG. 3 are inserted into c, 22c, so that they can be fixed to the step portion of the stepped hole 4a of the rotary holder 4.
【００１６】勿論、径方向調整部材２２の上段部２２ａ
と下段部２２ｂは別体に構成しても良く、この場合は上
段部２２ａと下段部２２ｂとの間にゴミ等が入り込まな
いよう留意する。また、段付穴４ａの形状と径方向調整
部材２２の形状は概ね同一形状としており、段付穴４ａ
に対して径方向調整部材２２を密着状に嵌合させること
で、特に回転方向に対してガタが生じないようにしてい
る。Of course, the upper step 22a of the radial direction adjusting member 22
The lower portion 22b and the lower portion 22b may be formed separately. In this case, care should be taken to prevent dust or the like from entering between the upper portion 22a and the lower portion 22b. The shape of the stepped hole 4a and the shape of the radial adjustment member 22 are substantially the same, and
By fitting the radial adjustment member 22 in close contact with the shaft, play is prevented particularly in the rotation direction.
【００１７】ところで、前記貫通孔２２ｄ、２２ｄによ
って上段部２２ａの肉厚は薄肉となり、また、貫通孔２
２ｄを上下に挟む上壁ｍと下壁ｎの各上下面には波形が
形成されている。そして、この上下壁ｍ、ｎの波形形状
によって、下段部２２ｂの下面ｔから上方に向けて力を
受けた際に、上下壁ｍ、ｎを伸びやすくして中間部の撓
み変形が容易なようにしている。また、上段部２２ａの
略中央部の上面には超硬合金でサンドイッチ状にされた
ダイヤモンド焼結体からなるリーマ切刃３が取り付けら
れている。The thickness of the upper portion 22a is reduced by the through holes 22d and 22d.
Waveforms are formed on the upper and lower surfaces of the upper wall m and the lower wall n sandwiching 2d vertically. When the upper and lower walls m and n are subjected to a force upward from the lower surface t of the lower portion 22b, the upper and lower walls m and n are easily stretched so that the intermediate portion can be easily deformed. I have to. A reamer cutting blade 3 made of a diamond sintered body sandwiched with a cemented carbide is attached to the upper surface of a substantially central portion of the upper portion 22a.
【００１８】また、径方向調整部材２２の側面には切削
油供給溝ｓを設けている。この切削油供給溝ｓは、下段
部２２ｂに設けた幅狭溝ｓ1と、上段部２２ａに設けた
幅広溝ｓ2、噴出溝ｓ3からなり、後述する切削油経路を
通じて幅狭溝ｓ1に送られる切削油を幅広溝ｓ2を介して
噴出溝ｓ3から噴き付けるようにしている。因みに、噴
出溝ｓ3を幅狭にしているのは、切粉等のゴミが径方向
調整部材２２と調整ロッド５の間の隙間に入り込むのを
防止するためである。A cutting oil supply groove s is provided on a side surface of the radial adjusting member 22. The cutting oil supply groove s includes a narrow groove s 1 provided in the lower portion 22b, the wide groove s 2 provided in the upper portion 22a, made from the ejection groove s 3, the narrow groove s 1 through cutting oil path, which will be described later so that sprayed from the ejection groove s 3 the cutting oil to be sent via the wide groove s 2 in. Incidentally, what the ejection groove s 3 width narrow is to prevent dust such as chips from entering the gap between the adjustment rod 5 and the radial adjusting member 22.
【００１９】以上のようなリーマ切刃３を取り付けた径
方向調整部材２２の円周方向には、図３のＢ−Ｂ線断面
図である図４に示すように、複数のガイド部材２４、２
４を設けている。このガイド部材２４は、前記径方向調
整部材２２とほぼ同様の構成からなる径方向調整部２４
ａ（但し、切削油供給溝ｓはない。）と、この径方向調
整部２４ａの上面に取り付けられた超硬合金製のガイド
部２４ｂからなり、同様に、調整ロッド５の軸方向への
移動にて径方向への張出し調整が出来るようにしてい
る。As shown in FIG. 4, which is a sectional view taken along the line BB of FIG. 3, a plurality of guide members 24 are provided in the circumferential direction of the radial direction adjusting member 22 to which the reamer cutting blade 3 is attached. 2
4 are provided. The guide member 24 includes a radial adjustment portion 24 having substantially the same configuration as the radial adjustment member 22.
a (however, there is no cutting oil supply groove s) and a guide portion 24b made of cemented carbide mounted on the upper surface of the radial adjusting portion 24a. Similarly, the adjusting rod 5 moves in the axial direction. It is possible to adjust the overhang in the radial direction with.
【００２０】次に切削油経路について説明する。図１に
示す前記切削油通路１２は調整ロッド５の軸心に沿って
延出した後、放射状路２５を介して回転ホルダ４と調整
ロッド５の隙間ｇと連通し、この隙間ｇは、調整ロッド
５の前方部に形成した切削油溝ｐ、切削油通路ｑに連通
している。そして、この切削油溝ｐの先端は前記径方向
調整部材２２の幅狭溝ｓ1に連通するとともに、切削油
通路ｑの先端部は前記アジャストスクリュー１７の切削
油通路ｒを介して前記外周ねじれ溝１５に連通してい
る。尚、切削油通路ｒの端部には盲栓２７をしている。Next, the cutting oil path will be described. The cutting oil passage 12 shown in FIG. 1 extends along the axis of the adjusting rod 5 and then communicates via a radial path 25 with a gap g between the rotary holder 4 and the adjusting rod 5. The cutting oil groove p and the cutting oil passage q formed in the front part of the rod 5 communicate with each other. The tip of the cutting oil groove p communicates with the narrow groove s 1 of the radial direction adjusting member 22, and the tip of the cutting oil passage q is twisted through the cutting oil passage r of the adjusting screw 17. It communicates with the groove 15. A blind plug 27 is provided at an end of the cutting oil passage r.
【００２１】以上のように構成した刃具径調整機構を備
えた工具の作用、効果について説明する。まず、所定の
穴径に合せてアジャストスクリュー１７を所定量ねじ込
み、クランプネジ１８、クランプピース１９にてアジャ
ストスクリュー１７を固定する。この時、切削油は供給
されていないため、ピストン６はピストン戻しスプリン
グ７によって図１の右方に移動しており、調整ロッド５
の先端とアジャストスクリュー１７の先端は離隔すると
ともに、径方向調整部材２２の下面ｔにはテーパコーン
部５ａの小径部が当接している。このため、径方向調整
部材２２及び径方向調整部２４ａに対する外側への押圧
力はなく、リーマ切刃３及びガイド部２４ｂ共に縮径し
た状態にある。The operation and effect of the tool provided with the blade diameter adjusting mechanism configured as described above will be described. First, an adjustment screw 17 is screwed in a predetermined amount in accordance with a predetermined hole diameter, and the adjustment screw 17 is fixed with a clamp screw 18 and a clamp piece 19. At this time, since the cutting oil is not supplied, the piston 6 is moved rightward in FIG.
The tip of the adjusting screw 17 is spaced apart from the tip of the adjusting screw 17, and the small diameter portion of the tapered cone portion 5 a is in contact with the lower surface t of the radial adjustment member 22. For this reason, there is no outward pressing force on the radial direction adjusting member 22 and the radial direction adjusting portion 24a, and both the reamer cutting blade 3 and the guide portion 24b are in a reduced diameter state.
【００２２】かかる状態の工具１をシリンダブロックＷ
の４ヵ所のクランクシャフト軸受穴に挿通させ、先端の
パイロット筒１３を軸受１４にて軸受けするとともに、
仕上バイト２等の刃部を図１に示すような位置にセット
する。この工具１の挿通の際、刃具径は収縮状態にある
ため、クランクシャフト軸受穴と干渉することはない。The tool 1 in this state is moved to the cylinder block W
And the pilot cylinder 13 at the tip is supported by the bearing 14,
The blades such as the finishing tool 2 are set at the positions shown in FIG. When the tool 1 is inserted, the diameter of the cutting tool is in a contracted state and does not interfere with the crankshaft bearing hole.
【００２３】次いで、回転ホルダ４を回転させながら切
削油を供給すると、切削油供給路８から後方シリンダ室
に供給された切削油圧にてピストン６は前進し、調整ロ
ッド５も、その先端部がアジャストスクリュー１７の先
端部に当接するまで前進する。このため、径方向調整部
材２２の下面ｔにはテーパコーン部５ａの大径部が当接
し、径方向調整部材２２を径方向の外側に押圧する。従
って、径方向調整部材２２の中間部が撓んで外側に張出
し、リーマ切刃３及びガイド部２４ｂが突出する。この
際、貫通孔２２ｄの上下壁ｍ、ｎは薄肉であり、しかも
波形形状であるため、図６に示すような弾性変形に対し
て伸び縮みすることが出来、径方向に対して容易に変形
する。Next, when the cutting oil is supplied while rotating the rotary holder 4, the piston 6 advances by the cutting oil pressure supplied to the rear cylinder chamber from the cutting oil supply passage 8, and the tip end of the adjusting rod 5 is also adjusted. It moves forward until it comes into contact with the tip of the adjusting screw 17. Therefore, the large-diameter portion of the tapered cone portion 5a abuts on the lower surface t of the radial direction adjusting member 22, and presses the radial direction adjusting member 22 outward in the radial direction. Accordingly, the intermediate portion of the radial direction adjusting member 22 bends and protrudes outward, and the reamer cutting blade 3 and the guide portion 24b protrude. At this time, since the upper and lower walls m and n of the through hole 22d are thin and have a corrugated shape, they can expand and contract with respect to elastic deformation as shown in FIG. I do.
【００２４】かかる状態で工具１を後退させながら当初
仕上バイト２で加工し、続いてリーマ切刃３で仕上加工
する。この際、径方向調整部材２２の長手方向の両端部
を固定しているため、切削抵抗が増減しても変形量は安
定し加工精度を保つことが出来る。また、貫通孔２２ｄ
を挟む上下壁ｍ、ｎは水平幅間隔を有するため、回転方
向については剛性があって撓みにくく、しかも回転方向
の両側は回転ホルダ４の段付穴４ａにほぼ密着状に嵌合
しているため、同方向への位置ずれ等はない。In this state, the tool 1 is processed by the finishing bit 2 while the tool 1 is being retracted, and then is processed by the reamer cutting edge 3. At this time, since both ends in the longitudinal direction of the radial direction adjusting member 22 are fixed, even if the cutting resistance increases or decreases, the deformation amount can be stabilized and the processing accuracy can be maintained. Also, the through hole 22d
Since the upper and lower walls m and n sandwiching the horizontal direction have a horizontal width interval, the upper and lower walls m and n have rigidity in the rotating direction and are not easily bent, and both sides in the rotating direction are fitted into the stepped holes 4a of the rotary holder 4 almost in close contact. Therefore, there is no displacement in the same direction.
【００２５】尚、実施例では撓みやすい貫通孔２２ｄ、
２２ｄの中間部にリーマ切刃３を取り付けているため、
リーマ切刃３部分の撓み量が左右均等になり、切刃３全
体を加工穴に対して均一に接触させて加工することが出
来る。また、加工時に径方向調整部材２２の側面の噴出
溝ｓ3から切削油が噴き出されるため、加工時に切り屑
等が入り込む虞れがなく、リーマ加工の精度を良好に保
つことが出来る。In the embodiment, the through-hole 22d which is easy to bend,
Because the reamer cutting blade 3 is attached to the middle part of 22d,
The amount of deflection of the reamer cutting blade 3 becomes equal to the left and right, and the entire cutting blade 3 can be uniformly contacted with the processing hole for processing. Further, since the cutting oil is spouted from the jet grooves s 3 side of the radial adjusting member 22 during processing, there is no possibility that dust, etc. from entering off during processing, it is possible to maintain the accuracy of the reaming good.
【００２６】[0026]
【発明の効果】以上のように本発明の刃具径調整機構を
備えた工具は、テーパコーン部材の進退動にて径方向調
整部材を撓ませて拡縮させるようにした刃具径調整機構
において、径方向調整部材の長手方向の両端部を固定す
るとともに、薄肉部によって中間部が容易に撓むように
したため、従来の片持固定方式に較べて刃具径を精密に
保持することが出来、加工精度を高めることが出来る。
そして、かかる薄肉部を板厚中間部の貫通孔にて形成す
れば、回転方向に対して剛性を確保しつつ径方向の変形
を容易にすることが可能であり、貫通孔を挟む上下壁を
波形にすることで、一層変形し易くすることが出来る。
また、リーマ切刃に適用した際に円周方向にガイド部材
を併設すれば、加工精度の高い１枚刃構成にすることが
出来る。As described above, the tool provided with the cutting tool diameter adjusting mechanism according to the present invention is characterized in that the cutting tool diameter adjusting mechanism is configured to bend and expand and contract the radial adjusting member by the reciprocating movement of the tapered cone member. In addition to fixing both ends in the longitudinal direction of the adjustment member, the middle part is easily bent by the thin part, so that the cutting tool diameter can be held more precisely than the conventional cantilever fixing method, and the processing accuracy is improved. Can be done.
If such a thin portion is formed by a through hole in the middle portion of the plate thickness, it is possible to facilitate deformation in the radial direction while securing rigidity in the rotating direction, and to form upper and lower walls sandwiching the through hole. By making it into a waveform, it can be further easily deformed.
Also, if features a circumferential direction on the guide member when applied to the reamer cutting edges, it can be a high one blade configuration processing accuracy.
【図１】本発明の刃具径調整機構を備えた工具全体の縦
断面図FIG. 1 is a vertical sectional view of an entire tool provided with a blade diameter adjusting mechanism of the present invention.
【図２】図１のＡ−Ａ線断面図FIG. 2 is a sectional view taken along line AA of FIG. 1;
【図３】刃具径調整機構の要部拡大図FIG. 3 is an enlarged view of a main part of a blade diameter adjusting mechanism.
【図４】図３のＢ−Ｂ線断面図FIG. 4 is a sectional view taken along line BB of FIG. 3;
【図５】径方向調整部材の斜視図FIG. 5 is a perspective view of a radial direction adjusting member.
【図６】貫通孔の部分拡大図FIG. 6 is a partially enlarged view of a through hole.
１…工具、３…リーマ切刃、４…回転ホルダ、５…調整
ロッド、５ａ…テーパコーン部、１７…アジャストスク
リュー、２２…径方向調整部材、２２ｄ…貫通孔、２４
…ガイド部材、ｍ…上壁、ｎ…下壁。DESCRIPTION OF SYMBOLS 1 ... Tool, 3 ... Reaming cutter blade, 4 ... Rotating holder, 5 ... Adjustment rod, 5a ... Taper cone part, 17 ... Adjust screw, 22 ... Radial direction adjustment member, 22d ... Through hole, 24
... guide member, m ... upper wall, n ... lower wall.
Claims (3)
進退動させ、この進退動にて回転ホルダに取り付けた径
方向調整部材を径方向に拡縮させる刃具径調整機構を備
えた工具において、前記径方向調整部材は長手方向の両
端部が前記回転ホルダに固定され、これら固定部の内側
に径方向の変形を容易にする薄肉部が形成されるととも
に、長手方向の略中央部に切削切刃が設けられた刃具径
調整機構を備えた工具であって、前記径方向調整部材の
薄肉部は、板厚中間部に設けた貫通孔を上下に挟む上壁
と下壁にて形成されることを特徴とする刃具径調整機構
を備えた工具。1. A tool provided with a cutting tool diameter adjusting mechanism for moving a taper cone member forward and backward in a cylinder of a rotary holder, and expanding and contracting a radial adjusting member attached to the rotary holder in the forward and backward movements. The direction adjusting member is fixed at both ends in the longitudinal direction to the rotary holder, a thin portion is formed inside these fixed portions to facilitate deformation in the radial direction, and a cutting blade is provided at a substantially central portion in the longitudinal direction. Provided cutting tool diameter
A tool having an adjustment mechanism, wherein the
The thin part is the upper wall that vertically sandwiches the through hole provided in the middle part of the plate thickness.
A tool provided with a cutting tool diameter adjusting mechanism, wherein the tool is formed by a lower wall .
工具において、前記上壁と下壁は波形に形成されること
を特徴とする刃具径調整機構を備えた工具。2. A tool provided with a cutting tool diameter adjusting mechanism according to claim 1 , wherein the upper wall and the lower wall are formed in a waveform.
機構を備えた工具において、前記切削切刃はリーマ切刃
であり、且つこのリーマ切刃を中心に円周方向の所定角
度位置には、前記テーパコーン部材の進退動によって径
方向に拡縮自在なガイド部材が設けられたことを特徴と
する刃具径調整機構を備えた工具。3. A tool provided with a cutting tool diameter adjusting mechanism according to claim 1 , wherein the cutting edge is a reamer cutting edge, and a predetermined angular position in a circumferential direction around the reamer cutting edge. A tool provided with a blade diameter adjusting mechanism, wherein a guide member is provided which is radially expandable and contractable by the reciprocation of the tapered cone member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25322394A JP3070900B2 (en) | 1994-10-19 | 1994-10-19 | Tool with blade diameter adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25322394A JP3070900B2 (en) | 1994-10-19 | 1994-10-19 | Tool with blade diameter adjustment mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08118143A JPH08118143A (en) | 1996-05-14 |
| JP3070900B2 true JP3070900B2 (en) | 2000-07-31 |
Family
ID=17248287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25322394A Expired - Fee Related JP3070900B2 (en) | 1994-10-19 | 1994-10-19 | Tool with blade diameter adjustment mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3070900B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10333061B4 (en) * | 2003-07-18 | 2005-10-06 | Botek Präzisionsbohrtechnik Gmbh | wellhead |
| JP4844210B2 (en) * | 2006-04-20 | 2011-12-28 | 三菱マテリアル株式会社 | Method for correcting protrusion amount of cutting tool and finish cutting blade |
| US8469639B2 (en) | 2007-05-31 | 2013-06-25 | Valenite, Llc | Actuated material removal tool |
| EP2164664B1 (en) * | 2007-07-05 | 2014-10-08 | Sandvik, Inc. | Actuated material removal tool |
| JP5173351B2 (en) * | 2007-10-19 | 2013-04-03 | 三菱マテリアル株式会社 | Inner diameter machining method |
| JP5169579B2 (en) * | 2008-07-25 | 2013-03-27 | 株式会社デンソー | Milling cutter |
-
1994
- 1994-10-19 JP JP25322394A patent/JP3070900B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08118143A (en) | 1996-05-14 |
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