JP2002307216A - Method of machining a plurality of holes, and boring device used for carrying out the method - Google Patents
Method of machining a plurality of holes, and boring device used for carrying out the methodInfo
- Publication number
- JP2002307216A JP2002307216A JP2001121382A JP2001121382A JP2002307216A JP 2002307216 A JP2002307216 A JP 2002307216A JP 2001121382 A JP2001121382 A JP 2001121382A JP 2001121382 A JP2001121382 A JP 2001121382A JP 2002307216 A JP2002307216 A JP 2002307216A
- Authority
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- Japan
- Prior art keywords
- finishing
- semi
- holes
- turning radius
- tool
- 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.)
- Granted
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- Drilling And Boring (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば内燃機関の
シリンダブロックのシリンダボアのように同一ピッチで
整列して配置された複数個の穴を加工する方法と、この
加工方法を実施するのに使用する中ぐり加工装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for machining a plurality of holes arranged at the same pitch, for example, a cylinder bore of a cylinder block of an internal combustion engine, and a method for implementing the method. And a boring machine.
【０００２】[0002]
【従来の技術】例えば直列４気筒の内燃機関のシリンダ
ブロックのシリンダボアを加工する場合には、従来は図
１および図２に示すような中ぐり加工装置を使用して、
図８に示すような動作サイクルにより加工を行ってい
た。先ずこの従来技術の説明をする。この中ぐり加工装
置はトランスファマシンの一つの加工ステーションを構
成するもので、ベース１０上に起立固定されたコラム１
１の前面に固定したヘッドベース１２には主軸ヘッド１
３が昇降自在に案内支持されて、送り機構１５を介して
サーボモータ１４により昇降されるようになっている。
主軸ヘッド１３には互いに平行で垂直な１対の工具主軸
１７Ａ，１７Ｂが、シリンダブロック（ワーク）Ｗのシ
リンダボァ（穴）Ｗａ１〜Ｗａ４のピッチの２倍のピッ
チで、図２の紙面と平行な方向に配置され、主軸ヘッド
１３に設けたギヤボックス１３ａを介して主軸モータ１
８により回転駆動されるようになっている。支持桁２１
を介してベース１０に支持された治具ユニット２０の治
具テーブル２３上には、シリンダブロックＷが前の加工
ステーションから図２の紙面と平行に延びるトランスフ
ァバー２５により搬入されてクランプされる。治具テー
ブル２３は図２の紙面と平行な水平方向に移動可能であ
る。2. Description of the Related Art For example, when a cylinder bore of a cylinder block of an in-line four-cylinder internal combustion engine is machined, a boring machine as shown in FIGS. 1 and 2 has conventionally been used.
Processing was performed according to an operation cycle as shown in FIG. First, the prior art will be described. This boring machine constitutes one working station of the transfer machine, and a column 1 fixed upright on a base 10.
The head base 12 fixed to the front surface of the
3 is supported so as to be able to move up and down freely, and is moved up and down by a servomotor 14 via a feed mechanism 15.
A pair of parallel and perpendicular tool spindles 17A and 17B are arranged on the spindle head 13 at a pitch twice as large as the pitch of the cylinder bores (holes) Wa1 to Wa4 of the cylinder block (work) W and parallel to the plane of FIG. Spindle motor 1 through a gear box 13a provided in the spindle head 13
8 is driven to rotate. Support girder 21
On the jig table 23 of the jig unit 20 supported by the base 10 via the above, a cylinder block W is carried in from a previous processing station by a transfer bar 25 extending in parallel with the paper surface of FIG. The jig table 23 is movable in a horizontal direction parallel to the plane of FIG.
【０００３】この従来技術では、各工具主軸１７Ａ，１
７Ｂの下端に装着されてシリンダブロックＷのシリンダ
ボァＷａ１〜Ｗａ４を加工するクイルは中仕上げ刃具と
精仕上げ刃具を備えている。精仕上げ刃具はその刃先の
回転半径が所定の精仕上げ加工回転半径とそれより小さ
い回転半径の間で変化するように半径方向に進退するよ
うに構成されているが、精仕上げ刃具より軸線方向で前
側となる位置においてクイルに固定された中仕上げ刃具
の刃先の回転半径は、精仕上げ刃具の精仕上げ加工回転
半径と減少された回転半径の間となる一定値である。In this prior art, each tool spindle 17A, 1
The quill, which is attached to the lower end of 7B and processes the cylinder bores Wa1 to Wa4 of the cylinder block W, includes a medium finishing blade and a fine finishing blade. The fine finishing tool is configured to advance and retreat in the radial direction so that the turning radius of the cutting edge changes between a predetermined fine finishing turning radius and a smaller turning radius, but in the axial direction from the fine finishing tool. The turning radius of the cutting edge of the semi-finished cutting tool fixed to the quill at the position on the front side is a constant value between the fine turning radius of the fine finishing tool and the reduced turning radius.
【０００４】次にその作用を図８により説明する。先ず
図８の工程ｋにおいて、加工済みのシリンダブロックＷ
を搬出し未加工のシリンダブロックＷを搬入して治具テ
ーブル２３にクランプした状態で、治具テーブル２３を
水平方向に移動してシリンダブロックＷをその第１およ
び第３ボアＷａ１，Ｗａ３が各クイル３０Ａ，３０Ｂと
同軸的となる位置に割り出し、精仕上げ刃具を半径方向
に後退させてその刃先の回転半径を中仕上げ加工回転半
径より小として、各工具主軸１７Ａ，１７Ｂを主軸モー
タ１８により回転駆動する。この状態でサーボモータ１
４を作動させて主軸ヘッド１３を下降させ、各クイル３
０Ａ，３０Ｂを装着した各工具主軸１７Ａ，１７Ｂを先
ず早送りでシリンダブロックＷに接近させた後、所定の
下降速度でシリンダブロックＷに向かって前進（下降）
させて、各中仕上げ刃具により第１および第３ボアＷａ
１，Ｗａ３の中仕上げ加工を行う（工程ｌ参照）。次い
で精仕上げ刃具を半径方向に前進させてその刃先の回転
半径を精仕上げ加工回転半径とし（工程ｍ参照）、各工
具主軸１７Ａ，１７Ｂを後退させて精仕上げ刃具により
第１および第３ボアＷａ１，Ｗａ３の精仕上げ加工を行
う（工程ｎ参照）。Next, the operation will be described with reference to FIG. First, in step k of FIG. 8, the processed cylinder block W
The jig table 23 is moved in the horizontal direction while the unprocessed cylinder block W is carried in and clamped on the jig table 23, and the first and third bores Wa1 and Wa3 are moved by the first and third bores Wa1 and Wa3. The tool spindles 17A and 17B are rotated by the spindle motor 18 by indexing to a position coaxial with the quills 30A and 30B, retreating the fine finishing tool in the radial direction to make the turning radius of the cutting edge smaller than the intermediate finishing turning radius. Drive. In this state, the servo motor 1
4 to lower the spindle head 13 so that each quill 3
First, the tool spindles 17A and 17B equipped with 0A and 30B are made to approach the cylinder block W by rapid traverse, and then advance toward the cylinder block W at a predetermined descending speed (down).
Then, the first and third bores Wa are formed by the respective semi-finished cutting tools.
First, a semi-finishing of Wa3 is performed (see step l). Next, the fine-finishing blade is advanced in the radial direction to set the turning radius of the cutting edge as a fine-finishing turning radius (see step m), and the tool spindles 17A and 17B are retracted so that the first and third bores Wa1 are formed by the fine-finishing blade. , Wa3 (see step n).
【０００５】この精仕上げ加工の後、各工具主軸１７
Ａ，１７Ｂを所定位置まで早戻し後退させてから、前述
した工程ｋと同様にして治具テーブル２３を移動してシ
リンダブロックＷの第２および第４ボアＷａ２，Ｗａ４
を各クイル３０Ａ，３０Ｂと同軸的となる位置に割り出
し、精仕上げ刃具を半径方向に後退させてから（工程ｏ
参照）、各工具主軸１７Ａ，１７Ｂを早送りでシリンダ
ブロックＷに接近させ、次いで所定の下降速度で前進さ
せて、各中仕上げ刃具により第２および第４ボアＷａ
２，Ｗａ４の中仕上げ加工を行う（工程ｐ参照）。次い
で前述した工程ｍと同様にして精仕上げ刃具を半径方向
に前進させてから（工程ｑ参照）、各工具主軸１７Ａ，
１７Ｂを後退させて精仕上げ刃具により第２および第４
ボアＷａ２，Ｗａ４の精仕上げ加工を行う（工程ｒ参
照）。そして各工具主軸１７Ａ，１７Ｂを所定位置まで
早戻し後退させて、最初の工程ｋに戻す。After this fine finishing, each tool spindle 17
After the A and 17B are quickly returned to the predetermined positions and retracted, the jig table 23 is moved and the second and fourth bores Wa2 and Wa4 of the cylinder block W are moved in the same manner as in the above-described step k.
Is indexed to a position coaxial with each of the quills 30A and 30B, and the fine-finishing blade is retracted in the radial direction (step o).
), The tool spindles 17A, 17B are made to approach the cylinder block W by rapid traverse, and then advanced at a predetermined descending speed, and the second and fourth bores Wa are formed by the respective semi-finished cutting tools.
2, Wa4 is subjected to semi-finishing (see step p). Next, after the fine finishing tool is advanced in the radial direction in the same manner as in the above-described step m (see step q), each of the tool spindles 17A,
17B is retracted and the second and fourth blades are removed by the fine-finishing blade.
Fine finishing of the bores Wa2 and Wa4 is performed (see step r). Then, the tool spindles 17A and 17B are quickly returned to the predetermined positions and retreated to return to the first step k.
【０００６】上述した例では、各ボァＷａ１〜Ｗａ４は
予め荒仕上げされたものであるが、各クイル３０Ａ，３
０Ｂに刃先の回転半径が中仕上げ加工回転半径より小さ
くかつ中仕上げ刃具より前進方向前側に位置する荒仕上
げ刃具をさらに設けて、中仕上げ加工と同時に荒仕上げ
加工を行うようにしてもよい。In the above-described example, each of the bores Wa1 to Wa4 has been rough-finished in advance, but each of the quills 30A, 30A
At 0B, a rough finish cutting tool in which the rotation radius of the cutting edge is smaller than the semi-finishing turning radius and which is located on the forward side of the semi-finishing cutting tool in the forward direction may be further provided to perform the rough finishing simultaneously with the middle finishing.
【０００７】[0007]
【発明が解決しようとする課題】上述した従来技術の加
工方法によれば、剛性のあるシリンダブロックＷの場合
は特に問題なく加工できる。しかし最近は軽量化などの
ためにシリンダブロックを薄肉化したりあるいはボアラ
イナを鋳ぐるんだアルミダイキャスト製シリンダブロッ
クの採用が行われており、これによりシリンダボア回り
の剛性が低下するため、上述した加工方法では加工精度
を確保できないという問題が生じている。すなわち、第
１および第３ボアＷａ１，Ｗａ３は、中仕上げ加工およ
び精仕上げ加工により一旦は所定の精度に仕上げ加工さ
れるが、これに続く第２および第４ボアＷａ２，Ｗａ４
の中仕上げ加工および精仕上げ加工、特に切り込み量の
大きい中仕上げ加工により生じる残留歪みにより第１お
よび第３ボアＷａ１，Ｗａ３の仕上げ精度が低下すると
いう問題がある。本発明はこのような問題を解決するこ
とを目的とする。According to the above-described processing method of the prior art, a rigid cylinder block W can be processed without any particular problem. However, recently, the use of aluminum die-cast cylinder blocks in which the cylinder block is thinned or the bore liner is cast in order to reduce the weight, etc., has been adopted, and this reduces the rigidity around the cylinder bore. The method has a problem that the processing accuracy cannot be ensured. That is, the first and third bores Wa1 and Wa3 are once finished to a predetermined accuracy by the semi-finishing and the fine finishing, but the second and fourth bores Wa2 and Wa4 following this.
There is a problem that the finishing accuracy of the first and third bores Wa1 and Wa3 is reduced due to the residual strain caused by the semi-finishing and the fine finishing, particularly the semi-finishing with a large cutting depth. An object of the present invention is to solve such a problem.
【０００８】[0008]
【課題を解決するための手段】このために、本発明によ
る複数穴の加工方法は、請求項１に記載のように、１つ
のワークに互いに平行に同一ピッチで並んだ複数個の穴
を加工する方法であって、穴の個数の整数分の一の本数
でかつ穴のピッチの整数倍のピッチで互いに平行に並ん
だ回転軸線を中心として一緒に回転する中仕上げ刃具お
よび精仕上げ刃具を回転軸線方向に移動して、その刃具
では未加工の穴に順次挿入して加工する複数穴の加工方
法において、各穴の中仕上げ加工は、中仕上げ刃具の刃
先を所定の中仕上げ加工回転半径とし、かつ精仕上げ刃
具の刃先の回転半径を中仕上げ加工回転半径より小とし
て、各刃具を中仕上げ刃具では未加工の穴に順次前進挿
入する複数の中仕上げ工程により行い、最後を除く中仕
上げ工程の直後には各刃具は各刃先の回転半径を中仕上
げ加工回転半径より小として軸線方向に後退させ、各穴
の精仕上げ加工は、最後の中仕上げ工程の終了直後に精
仕上げ刃具の刃先の回転半径を中仕上げ加工回転半径よ
り大きい所定の精仕上げ加工回転半径として各刃具を軸
線方向に後退させる最初の精仕上げ工程により先ず最後
に中仕上げ加工された穴について行い、最後を除く中仕
上げ工程で中仕上げ加工された各穴については各刃具の
各刃先の回転半径を中仕上げ加工回転半径より小として
各穴に前進挿入してから精仕上げ刃具の刃先の回転半径
を精仕上げ加工回転半径として軸線方向に後退させる精
仕上げ工程により行うことを特徴とするものである。For this purpose, a method of machining a plurality of holes according to the present invention is directed to a method of machining a plurality of holes arranged in parallel at the same pitch in one work. A method of rotating a semi-finishing tool and a fine-finishing tool that rotate together about a rotation axis aligned in parallel with each other at a pitch equal to an integral number of the number of holes and an integral multiple of the pitch of the holes. In the multi-hole machining method of moving in the axial direction and sequentially inserting and machining the uncut holes with the cutting tool, in the semi-finishing of each hole, the cutting edge of the semi-finishing tool is set to a predetermined semi-finishing turning radius. In addition, the turning radius of the cutting edge of the fine finishing tool is smaller than the turning radius of the semi-finishing process, and the semi-finishing process is performed by inserting a plurality of cutting tools into the unprocessed holes in the semi-finishing tool sequentially and sequentially excluding the last. Immediately after Each cutting tool retreats in the axial direction with the turning radius of each cutting edge smaller than the semi-finishing turning radius, and for the fine finishing of each hole, the turning radius of the cutting edge of the fine finishing cutting tool is set immediately after the end of the last semi-finishing process. Finishing is performed on the hole that has been semi-finished by the first fine finishing step, in which each tool is retracted in the axial direction as a predetermined fine finishing rotating radius larger than the final turning radius. For each drilled hole, the turning radius of each cutting edge of each cutting tool is smaller than the semi-finish machining turning radius, insert it forward into each hole, and then retreat in the axial direction as the turning radius of the cutting edge of the fine finishing cutting tool as the fine finishing turning radius. It is characterized in that it is performed in a fine finishing step.
【０００９】請求項１に記載の複数穴の加工方法は、請
求項２に記載のように、ワークは内燃機関のシリンダブ
ロックであり、複数個の穴は整列して配置された４個以
上の偶数個のシリンダボアであることが好ましい。In the method for machining a plurality of holes according to the first aspect, the work is a cylinder block of an internal combustion engine, and the plurality of holes are four or more aligned. Preferably, it is an even number of cylinder bores.
【００１０】請求項１または請求項２に記載の複数穴の
加工方法は、請求項３に記載のように、最後を除く中仕
上げ工程の直後に行う各刃具の後退は早戻しにより行
い、最後を除く中仕上げ工程で中仕上げされた各穴につ
いての精仕上げ工程に先立つ各刃具の挿入は早送りによ
り行うことが好ましい。In the method for machining a plurality of holes according to the first or second aspect, the retreat of each cutting tool performed immediately after the semi-finishing step except the last is performed by rapid return. It is preferable that the insertion of each cutting tool prior to the fine finishing step for each hole semi-finished in the medium finishing step except for the above is performed by rapid traverse.
【００１１】請求項１〜請求項３の何れか１項に記載の
複数穴の加工方法は、請求項４に記載のように、各回転
軸線を中心として各刃具と一緒に回転し刃先の回転半径
が中仕上げ加工回転半径より小さくかつ中仕上げ刃具よ
り前進方向前側に位置する荒仕上げ刃具により、中仕上
げ工程において穴の荒仕上げ加工をも行うことが好まし
い。The method of machining a plurality of holes according to any one of claims 1 to 3, as described in claim 4, rotates the cutting edge together with each cutting tool about each rotation axis. It is preferable to also perform rough finishing of a hole in the semi-finishing process by using a rough finishing tool whose radius is smaller than the semi-finishing turning radius and located forward of the semi-finishing tool in the forward direction.
【００１２】請求項１〜請求項４の何れか１項に記載の
複数穴の加工方法は、請求項５に記載のように、回転軸
線のピッチは複数個の穴のピッチの２倍であり、回転軸
線の本数は複数個の穴の個数の半分であることが好まし
い。In the method for processing a plurality of holes according to any one of claims 1 to 4, the pitch of the rotation axis is twice the pitch of the plurality of holes. Preferably, the number of rotation axes is half the number of holes.
【００１３】また本発明による複数穴用中ぐり加工装置
は、請求項６に記載のように、１つのワークに互いに平
行に同一ピッチで並んだ複数個の穴を加工する中ぐり加
工装置であって、穴の個数の整数分の一の本数でかつ穴
のピッチの整数倍のピッチで互いに平行に並んで回転軸
線方向に進退動される工具主軸と、この各工具主軸の先
端に装着されそれぞれ中仕上げ刃具および精仕上げ刃具
を備えたクイルと、ワークを支持するとともに各工具主
軸に対しそれらの回転軸線を結ぶ方向に相対的に移動可
能な治具ユニットを備えてなる複数穴用中ぐり加工装置
において、中仕上げ刃具はその刃先の回転半径が所定の
中仕上げ加工回転半径とそれより小さい回転半径の間で
変化するように半径方向に進退可能とし、精仕上げ刃具
はその刃先の回転半径が中仕上げ加工回転半径より大き
い所定の精仕上げ加工回転半径と同中仕上げ加工回転半
径より小さい回転半径の間で変化するように半径方向に
進退可能としたことを特徴とするものである。The boring device for multiple holes according to the present invention is a boring device for boring a plurality of holes arranged in parallel at the same pitch on one work. A tool spindle which is arranged in parallel with each other at a pitch equal to an integral number of the number of holes and which is an integral multiple of the pitch of the holes, and which is moved back and forth in the direction of the rotation axis; A quill equipped with a semi-finishing blade and a fine finishing blade, and a multi-hole boring machine equipped with a jig unit that supports the work and is movable relative to each tool spindle in the direction connecting their rotation axes. In the apparatus, the semi-finished cutting tool is capable of moving forward and backward in the radial direction such that the turning radius of the cutting edge changes between a predetermined semi-finishing turning radius and a smaller turning radius. Is characterized in that the diameter was retractable radially so as to vary between semi-finishing rotational radius greater than the predetermined precision finish machining turning radius and Dochu finishing turning radius smaller than the radius of rotation.
【００１４】請求項６に記載の複数穴用中ぐり加工装置
は、請求項７に記載のように、ワークは内燃機関のシリ
ンダブロックであり、複数個の穴は整列して配置された
４個以上の偶数個のシリンダボアであることが好まし
い。According to a sixth aspect of the present invention, in the multi-hole boring apparatus, the work is a cylinder block of an internal combustion engine, and the plurality of holes are four aligned. It is preferable that the number of the cylinder bores is even.
【００１５】請求項６または請求項７に記載の複数穴用
中ぐり加工装置は、請求項８に示すように、各クイル内
を軸線方向に進退動して各刃具を半径方向に進退させる
１本の作動軸を備え、中仕上げ刃具と精仕上げ刃具は作
動軸の進退動に応じて互いに逆向きに半径方向に進退す
るよう構成することが好ましい。The boring device for multiple holes according to claim 6 or 7, as described in claim 8, moves in each quill in the axial direction to move each cutting tool in the radial direction. It is preferable that the operating shaft is provided, and the semi-finishing blade and the fine finishing blade are configured to advance and retreat in opposite directions in the radial direction according to the advance and retreat of the operating shaft.
【００１６】請求項６〜請求項８の何れか１項に記載の
複数穴用中ぐり加工装置は、請求項９に示すように、各
クイルには、刃先の回転半径が中仕上げ加工回転半径よ
り小さくかつ中仕上げ刃具より前進方向前側に位置する
荒仕上げ刃具をさらに設けることが好ましい。According to a ninth aspect of the present invention, in each of the quills, the turning radius of the cutting edge is a semi-finished turning radius. It is preferable to further provide a rough finishing tool which is smaller and located on the front side in the forward direction than the semi-finishing tool.
【００１７】請求項６〜請求項９の何れか１項に記載の
複数穴用中ぐり加工装置は、請求項１０に示すように、
工具主軸のピッチは複数個の穴のピッチの２倍であり、
工具主軸の本数は複数個の穴の個数の半分であることが
好ましい。According to a tenth aspect of the present invention, a multi-hole boring device according to any one of the sixth to ninth aspects is provided.
The pitch of the tool spindle is twice the pitch of multiple holes,
Preferably, the number of tool spindles is half the number of holes.
【００１８】また本発明による複数穴の加工方法は、請
求項１１に記載のように、１つのワークに互いに平行に
並んだ複数個の穴を加工する方法であって、１本の回転
軸線を中心として一緒に回転する中仕上げ刃具および精
仕上げ刃具を回転軸線方向に移動して、その刃具では未
加工の穴に順次挿入して加工する複数穴の加工方法にお
いて、各穴の中仕上げ加工は、中仕上げ刃具の刃先を所
定の中仕上げ加工回転半径とし、かつ精仕上げ刃具の刃
先の回転半径を中仕上げ加工回転半径より小として、各
刃具を中仕上げ刃具では未加工の穴に順次前進挿入する
複数の中仕上げ工程により行い、最後を除く中仕上げ工
程の直後には各刃具は各刃先の回転半径を中仕上げ加工
回転半径より小として軸線方向に後退させ、各穴の精仕
上げ加工は、最後の中仕上げ工程の終了直後に精仕上げ
刃具の刃先の回転半径を中仕上げ加工回転半径より大き
い所定の精仕上げ加工回転半径として各刃具を軸線方向
に後退させる最初の精仕上げ工程により先ず最後に中仕
上げ加工された穴について行い、最後を除く中仕上げ工
程で中仕上げ加工された各穴については各刃具の各刃先
の回転半径を中仕上げ加工回転半径より小として各穴に
前進挿入してから精仕上げ刃具の刃先の回転半径を精仕
上げ加工回転半径として軸線方向に後退させる精仕上げ
工程により行うようにしてもよい。The method of machining a plurality of holes according to the present invention is a method of machining a plurality of holes arranged in parallel in a single workpiece as described in claim 11, wherein one rotation axis is formed. In the multi-hole machining method in which the semi-finished cutting tool and the fine-finished cutting tool that rotate together as the center are moved in the rotation axis direction and the cutting tool is sequentially inserted into unprocessed holes, the semi-finishing process for each hole is , The cutting edge of the semi-finished cutting tool is set to the predetermined semi-finishing turning radius, and the turning radius of the fine finishing cutting edge is set to be smaller than the turning radius of the semi-finishing cutting tool. Immediately after the semi-finishing process except for the last one, each cutting tool retracts in the axial direction with the turning radius of each cutting edge smaller than the semi-finishing turning radius. last Immediately after finishing the semi-finishing process, the turning radius of the cutting edge of the fine-finishing tool is set to a predetermined fine-finishing turning radius larger than the semi-finishing turning radius. For holes that have been machined in the semi-finishing process except the last, the turning radius of each cutting edge of each cutting tool is smaller than the semi-finishing turning radius for each hole that has been semi-finished in the middle finishing process except the last, and then fine-inserted into each hole before fine finishing The rotation may be performed by a fine finishing step in which the turning radius of the cutting edge of the cutting tool is retreated in the axial direction as a fine finishing turning radius.
【００１９】また本発明による複数穴用中ぐり加工装置
は、請求項１２に記載のように、１つのワークに互いに
平行に並んだ複数個の穴を加工する中ぐり加工装置であ
って、回転軸線方向に進退動される工具主軸の先端に装
着されそれぞれ中仕上げ刃具および精仕上げ刃具を備え
たクイルと、ワークを支持するとともに各工具主軸に対
し複数個の穴の軸線を結ぶ方向に相対的に移動可能な治
具ユニットを備えてなる複数穴用中ぐり加工装置におい
て、中仕上げ刃具はその刃先の回転半径が所定の中仕上
げ加工回転半径とそれより小さい回転半径の間で変化す
るように半径方向に進退可能とし、精仕上げ刃具はその
刃先の回転半径が中仕上げ加工回転半径より大きい所定
の精仕上げ加工回転半径と同中仕上げ加工回転半径より
小さい回転半径の間で変化するように半径方向に進退可
能としてもよい。According to a twelfth aspect of the present invention, there is provided a boring apparatus for boring a plurality of holes arranged in parallel in a single workpiece. A quill that is attached to the tip of a tool spindle that is advanced and retracted in the axial direction and has a semi-finishing tool and a fine finishing tool, respectively, and supports the work and is relative to the direction connecting the axes of a plurality of holes to each tool spindle. In a multi-hole boring device comprising a jig unit movable to a semi-finish cutting tool, the turning radius of the cutting edge is changed between a predetermined semi-finishing turning radius and a smaller turning radius. It is possible to advance and retreat in the radial direction, and the fine-finish cutting tool has a turning radius of a predetermined fine-finishing turning radius smaller than the semi-finishing turning radius, the turning radius of the cutting edge of which is larger than the intermediate finishing turning radius. In it may be retractable radially so as to change.
【００２０】[0020]
【発明の実施の形態】以下に図１〜図７に示す実施の形
態により、本発明による複数穴の加工方法およびその方
法を実施する中ぐり加工装置の説明をする。この実施の
形態は、本発明を直列４気筒の内燃機関のシリンダブロ
ックのシリンダボアの加工に適用したものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for machining a plurality of holes according to the present invention and a boring apparatus for implementing the method will be described below with reference to the embodiments shown in FIGS. In this embodiment, the present invention is applied to machining of a cylinder bore of a cylinder block of an in-line four-cylinder internal combustion engine.
【００２１】この実施の形態の中ぐり加工装置は、クイ
ル３０Ａ，３０Ｂおよび刃具４１，４６を作動させる装
置を除き、前述した従来技術で説明したものと実質的に
同じであり、ベース１０とコラム１１とヘッドベース１
２と、ヘッドベース１２に昇降自在に案内支持されて送
り機構１５を介してサーボモータ１４により垂直に昇降
される主軸ヘッド１３を備えている。主軸ヘッド１３に
は互いに平行で垂直な回転軸線を有する１対の工具主軸
１７Ａ，１７Ｂが、シリンダブロック（ワーク）Ｗのシ
リンダボァ（穴）Ｗａ１〜Ｗａ４のピッチの２倍のピッ
チで、図２の紙面と平行な方向に間を隔てて配置され、
主軸ヘッド１３に設けたギヤボックス１３ａを介して主
軸モータ１８により回転駆動されるようになっている。
各工具主軸１７Ａ，１７Ｂには、後述する作動軸５０を
挿通する内孔１７ａ（図６参照）が同軸的に形成されて
いる。支持桁２１を介してベース１０に支持された治具
ユニット２０には、図２の紙面と平行な水平方向に移動
可能に治具テーブル２３が支持され、前の加工ステーシ
ョンから図２の紙面と平行に延びるトランスファバー２
５により搬入されたシリンダブロックＷは治具テーブル
２３上にクランプされる。The boring apparatus of this embodiment is substantially the same as that described in the prior art except for a device for operating the quills 30A and 30B and the blades 41 and 46. 11 and head base 1
And a spindle head 13 which is vertically guided and supported by a head base 12 and vertically moved up and down by a servomotor 14 via a feed mechanism 15. The spindle head 13 has a pair of tool spindles 17A and 17B having rotation axes parallel and perpendicular to each other at a pitch twice as large as the pitch of the cylinder bores (holes) Wa1 to Wa4 of the cylinder block (work) W in FIG. It is arranged at a distance in the direction parallel to the paper,
The motor is driven to rotate by a spindle motor 18 via a gear box 13 a provided on the spindle head 13.
In each of the tool spindles 17A and 17B, an inner hole 17a (see FIG. 6) through which an operating shaft 50 described later is inserted is formed coaxially. A jig table 23 is supported by a jig unit 20 supported on the base 10 via a support girder 21 so as to be movable in a horizontal direction parallel to the plane of FIG. Transfer bar 2 extending in parallel
The cylinder block W carried in by 5 is clamped on the jig table 23.
【００２２】各工具主軸１７Ａ，１７Ｂの下端には、シ
リンダブロックＷの各シリンダボァＷａ１〜Ｗａ４を加
工する荒仕上げ刃具３６と中仕上げ刃具４１と精仕上げ
刃具４６がそれぞれ設けられた第１クイル３０Ａおよび
第２クイル３０Ｂがそれぞれ同軸的に装着されている。
この各クイル３０Ａ，３０Ｂは同一であるので、第１ク
イル３０Ａを図３〜図５により説明する。第１クイル３
０Ａは同軸的に貫通する内孔３０ａが形成された円筒状
で、その先端は丸いブロック３０ｂにより閉じられてい
る。第１クイル３０Ａの先端付近の外周面には、クイル
３０Ａの回転軸線と平行に、各１つの第１取付面３１ａ
および第３取付面３１ｃと２つの第２取付面３１ｂが９
０度おきに線対称的に形成されている。各取付面３１ａ
〜３１ｃの断面形状は何れも同一のＬ字形であり、第１
取付面３１ａと第３取付面３１ｃは１８０度おきに形成
され、この両取付面３１ａ，３１ｃの間に各第２取付面
３１ｂが形成されている。At the lower end of each of the tool spindles 17A and 17B, a first quill 30A provided with a rough finishing blade 36, a semi-finishing blade 41 and a fine finishing blade 46 for processing the cylinder bores Wa1 to Wa4 of the cylinder block W, respectively. The second quills 30B are mounted coaxially.
Since the quills 30A and 30B are the same, the first quill 30A will be described with reference to FIGS. First quill 3
Reference numeral 0A denotes a cylindrical shape having an inner hole 30a penetrating coaxially, and the tip is closed by a round block 30b. On the outer peripheral surface near the tip of the first quill 30A, one first mounting surface 31a is provided in parallel with the rotation axis of the quill 30A.
And the third mounting surface 31c and the two second mounting surfaces 31b are 9
It is formed line-symmetrically every 0 degrees. Each mounting surface 31a
To 31c have the same L-shape,
The mounting surface 31a and the third mounting surface 31c are formed every 180 degrees, and the second mounting surfaces 31b are formed between the mounting surfaces 31a and 31c.
【００２３】第１取付面３１ａの工具主軸１７Ａ側には
剛性のある角棒状の荒仕上げ刃具ホルダ３５の一端がボ
ルト３７により固定され、ブロック３０ｂ側に延びる先
端部には荒仕上げ刃具３６が固着されている（図３およ
び図４参照）。同様に、各第２取付面３１ｂおよび第３
取付面３１ｃには、それぞれ角棒状の中仕上げ刃具ホル
ダ４０および精仕上げ刃具ホルダ４５の一端がボルト４
４，４９により固定され、各刃具ホルダ４０，４５のブ
ロック３０ｂ側先端部には、それぞれ中仕上げ刃具４１
および精仕上げ刃具４６が固着されている。この中仕上
げ刃具ホルダ４０と精仕上げ刃具ホルダ４５には、ボル
ト４４，４９による固定部と各刃具４１，４６の取付部
分との間に、取付面３１ｂ，３１ｃ側から切込みを設け
ることにより、各刃具４１，４６を設けた先端部が半径
方向外向きに弾性的に撓むのを可能とする可撓部４０
ａ，４５ａが形成されている。従って荒仕上げ刃具３６
の刃先の回転半径は一定であるが、中仕上げ刃具４１お
よび精仕上げ刃具４６の各刃先の回転半径は可変であ
る。また精仕上げ刃具４６と中仕上げ刃具４１と荒仕上
げ刃具３６の各刃先は、この順に第１クイル３０Ａの先
端側（シリンダブロックＷに向かう側）となるように配
置されている。One end of a rigid square bar-shaped rough finishing tool holder 35 is fixed to the tool spindle 17A side of the first mounting surface 31a by bolts 37, and a rough finishing tool 36 is fixed to a tip end extending to the block 30b side. (See FIGS. 3 and 4). Similarly, each of the second mounting surfaces 31b and the third
One end of a square-rod-shaped semi-finished blade holder 40 and one of the finely-finished blade holder 45 is attached to the mounting surface 31c with a bolt 4
The semi-finished cutting tools 41 are fixed to the tip of the cutting tool holders 40 and 45 on the block 30b side, respectively.
And the fine finishing blade 46 is fixed. Each of the semi-finished blade holder 40 and the finely-finished blade holder 45 is provided with a cut from the mounting surface 31b, 31c side between the fixing portion by the bolts 44, 49 and the mounting portion of each blade 41, 46. A flexible portion 40 that allows the distal end portion provided with the blade tools 41 and 46 to elastically flex outward in the radial direction.
a, 45a are formed. Therefore, the rough finishing tool 36
Are constant, but the turning radii of the respective cutting edges of the semi-finished cutting tool 41 and the fine finishing cutting tool 46 are variable. The cutting edges of the fine finishing blade 46, the semi-finishing blade 41, and the rough finishing blade 36 are arranged in this order on the front end side (the side toward the cylinder block W) of the first quill 30A.
【００２４】主軸ヘッド１３の後側（上側）から工具主
軸１７Ａに挿入した作動軸５０は、軸線方向に案内溝５
１を形成した先端部が第１クイル３０Ａの内孔３０ａ内
に軸線方向摺動自在に嵌合され、荒仕上げ刃具ホルダ３
５と軸線方向に並んだ第１クイル３０Ａに設けたピン３
２の先端を案内溝５１に挿入することにより、第１クイ
ル３０Ａに対する回動は阻止されている。作動軸５０の
先端部には、各刃具ホルダ４０，４５と対応する角度位
置に長手方向に沿ったテーパ溝５２ａ，５２ｂが形成さ
れ、各中仕上げ刃具ホルダ４０と対応する各第１テーパ
溝５２ａは作動軸５０の先端に進むにつれて深さが深く
なり、精仕上げ刃具ホルダ４５と対応する第２テーパ溝
５２ｂは作動軸５０の先端に進むにつれて深さが浅くな
っている。各テーパ溝５２ａ，５２ｂ内に摺動自在に設
けたＬ形のスライド片４３，４８は、その突部４３ａ，
４８ａが第１クイル３０Ａの先端とブロック３０ｂの間
に半径方向摺動自在に保持されている。The operating shaft 50 inserted into the tool spindle 17A from the rear side (upper side) of the spindle head 13 has a guide groove 5 in the axial direction.
1 is slidably fitted in the inner hole 30a of the first quill 30A in the axial direction, and the rough finishing tool holder 3
5 and a pin 3 provided on the first quill 30A arranged in the axial direction.
By inserting the tip of the second quill 30 into the guide groove 51, the rotation with respect to the first quill 30A is prevented. At the distal end of the operating shaft 50, tapered grooves 52a, 52b are formed along the longitudinal direction at angular positions corresponding to the blade holders 40, 45, and the first tapered grooves 52a corresponding to the semi-finished blade holders 40, respectively. The depth of the second tapered groove 52b corresponding to the fine-finishing tool holder 45 decreases as the position advances toward the tip of the operating shaft 50. L-shaped slide pieces 43 and 48 slidably provided in the respective tapered grooves 52a and 52b have protrusions 43a and
48a is slidably held in the radial direction between the tip of the first quill 30A and the block 30b.
【００２５】また第１クイル３０Ａには、長手方向では
各刃具ホルダ４０，４５の各可撓部４０ａ，４５ａより
先端側で、角度方向では各テーパ溝５２ａ，５２ｂと対
応する各位置に、それぞれ半径方向に貫通する第１ガイ
ド穴３３および第２ガイド穴３４が形成されている。こ
の各ガイド穴３３，３４に摺動自在に挿入された各可動
ピン４２，４７の両端は、それぞれスライド片４３，４
８と刃具ホルダ４０，４５の各可撓部４０ａ，４５ａよ
り先端側に当接されている。Further, the first quill 30A is located at a position distal to the flexible portions 40a and 45a of the blade holders 40 and 45 in the longitudinal direction and at positions corresponding to the tapered grooves 52a and 52b in the angular direction. A first guide hole 33 and a second guide hole 34 penetrating in the radial direction are formed. Both ends of the movable pins 42 and 47 slidably inserted into the guide holes 33 and 34 are slide pieces 43 and 4 respectively.
8 and the tool holders 40 and 45 are in contact with the distal ends of the flexible portions 40a and 45a.
【００２６】特に、本実施の形態においては、図５に示
すように、中仕上げ刃具ホルダ４０に整合する第１ガイ
ド穴３３は段付穴として形成され、可動ピン４２は大径
頭付きのプラグ状に形成されている。図５の左半部断面
のように作動軸５０が後退して刃具ホルダ４０を径方向
内方に後退させた状態では、可動ピン４２の頭部は第１
ガイド穴３３の大径部底面に着座して径方向内方へのそ
れ以上の引っ込みが阻止され、回転遠心力により可動ピ
ン４２の内端部に当接するスライド片４３と作動軸５０
のテーパ面間に隙間Ｃが形成されるようになっている。
一方、図５の左半部断面のように、作動軸５０が前進し
て刃具ホルダ４０を径方向外方に張り出した状態では、
作動軸５０のテーパ溝５２ａの底面がスライド片４３お
よび可動ピン４２を径方向外方へ押し出し、可動ピン４
２の頭部が第１ガイド穴３３の大径部底面への着座位置
から離れるようにしてある。In particular, in the present embodiment, as shown in FIG. 5, the first guide hole 33 aligned with the semi-finished blade holder 40 is formed as a stepped hole, and the movable pin 42 is a plug with a large diameter head. It is formed in a shape. In a state where the operating shaft 50 is retracted and the blade holder 40 is retracted radially inward as in the left half section of FIG. 5, the head of the movable pin 42 is in the first position.
The slide shaft 43 and the operating shaft 50 are seated on the bottom surface of the large-diameter portion of the guide hole 33 to prevent further retraction inward in the radial direction, and abut the inner end of the movable pin 42 by the rotational centrifugal force.
A gap C is formed between the tapered surfaces.
On the other hand, as shown in the left half section of FIG. 5, in a state where the operating shaft 50 moves forward and the blade holder 40 projects radially outward,
The bottom surface of the tapered groove 52a of the operating shaft 50 pushes the slide piece 43 and the movable pin 42 outward in the radial direction.
The second head is separated from the seating position of the first guide hole 33 on the bottom surface of the large diameter portion.
【００２７】すなわち、精仕上げ加工のために作動軸５
０が後退された状態では、作動軸５０は径方向に対向す
る一対のテーパ溝５２ａの溝底がスライド片４３の底面
との間に隙間Ｃを持つこととなり、これにより精仕上げ
加工中においては、中仕上げ刃具ホルダ４０の径方向内
方へ向かう弾性力が可動ピン４２およびスライド片４３
を介して作動軸５０に作用することを阻止し、精仕上げ
刃具４６の位置変動を防止するように構成されている。That is, the operating shaft 5 for the fine finishing process
In the state where 0 is retracted, the operating shaft 50 has a gap C between the bottoms of the pair of radially opposed tapered grooves 52a and the bottom surface of the slide piece 43, so that during fine finishing, The elastic force of the semi-finished blade holder 40 inward in the radial direction is caused by the movable pin 42 and the slide piece 43.
, And is prevented from acting on the operating shaft 50 through the shaft, thereby preventing a position change of the fine finishing tool 46.
【００２８】以上の構成により、作動軸５０が第１クイ
ル３０Ａに対しブロック３０ｂ側に向かって前進すれ
ば、各第１テーパ溝５２ａ内の各スライド片４３は半径
方向外向きに移動し、この移動は各可動ピン４２により
各中仕上げ刃具ホルダ４０に伝達されて中仕上げ刃具４
１をその刃先の回転半径が増大するように半径方向に前
進させ、これと同時に各第２テーパ溝５２ｂ内の各スラ
イド片４８は半径方向内向きに移動し、この移動は各可
動ピン４２により各精仕上げ刃具ホルダ４５に伝達され
て精仕上げ刃具４６をその刃先の回転半径が減少するよ
うに半径方向に後退させる。これと逆に作動軸５０を第
１クイル３０Ａに対し後退すれば、中仕上げ刃具４１は
半径方向に後退してその刃先の回転半径は減少し、精仕
上げ刃具４６は半径方向に前進してその刃先の回転半径
は増大する。これらの半径方向の前進後退により、中仕
上げ刃具４１の刃先の回転半径は所定の中仕上げ加工回
転半径とそれより小さい回転半径の間で変化し、精仕上
げ刃具４６のの刃先の回転半径は、中仕上げ加工回転半
径より大きい所定の精仕上げ加工回転半径と中仕上げ加
工回転半径より小さい回転半径の間で変化する。荒仕上
げ刃具３６の刃先の回転半径は、中仕上げ加工回転半径
より小である。With the above configuration, when the operating shaft 50 advances toward the block 30b with respect to the first quill 30A, each slide piece 43 in each first tapered groove 52a moves radially outward. The movement is transmitted to each semi-finished blade holder 40 by each movable pin 42 and the semi-finished blade 4
1 is advanced in the radial direction so as to increase the rotation radius of the cutting edge, and at the same time, each slide piece 48 in each second tapered groove 52b moves radially inward, and this movement is performed by each movable pin 42. It is transmitted to each fine finishing tool holder 45 and retreats the fine finishing tool 46 in the radial direction so that the turning radius of the cutting edge is reduced. Conversely, when the operating shaft 50 is retracted with respect to the first quill 30A, the semi-finished cutting tool 41 is retracted in the radial direction, the turning radius of the cutting edge is reduced, and the fine-finishing cutting tool 46 advances in the radial direction, and The turning radius of the cutting edge increases. With these radial advance and retreat, the turning radius of the cutting edge of the semi-finished cutting tool 41 changes between a predetermined semi-finishing turning radius and a smaller turning radius, and the turning radius of the cutting edge of the fine finishing cutting tool 46 becomes It changes between a predetermined fine finishing turning radius larger than the intermediate finishing turning radius and a turning radius smaller than the intermediate finishing turning radius. The turning radius of the cutting edge of the rough finishing tool 36 is smaller than the turning radius of the semi-finishing process.
【００２９】図６に示すように、工具主軸１７Ａに対し
作動軸５０を軸線方向に移動させる作動装置６０は、主
軸ヘッド１３の後端部に支持部材６８を介して取り付け
られたハウジング６１を有している。ハウジング６１に
は工具主軸１７Ａの回転軸線と平行となるように筒状体
６２が摺動自在に案内支持され、軸受を介して作動軸５
０の後部に回転のみ自在に連結されたブラケット６３は
筒状体６２の下端に固定されている。筒状体６２と同軸
的となるように、軸受を介してハウジング６１に回転の
み自在に支持された送りねじ６５の下半部は、筒状体６
２に固定したナット６４に螺合され、送りねじ６５の上
端部は、ハウジング６１に取り付けたサーボモータ６６
に継ぎ手６７を介して連結されている。サーボモータ６
６を作動させれば送りねじ６５が回転して筒状体６２を
軸線方向に移動させ、ブラケット６３を介して作動軸５
０は工具主軸１７Ａに対し軸線方向に移動される。As shown in FIG. 6, an actuator 60 for moving the operating shaft 50 in the axial direction with respect to the tool spindle 17A has a housing 61 attached to a rear end of the spindle head 13 via a support member 68. are doing. A cylindrical body 62 is slidably guided and supported by the housing 61 so as to be parallel to the rotation axis of the tool spindle 17A.
A bracket 63 rotatably connected to a rear portion of the cylindrical body 62 is fixed to a lower end of the tubular body 62. The lower half of the feed screw 65, which is rotatably supported by the housing 61 via a bearing so as to be coaxial with the cylindrical body 62, is a cylindrical body 6.
2 is screwed to a nut 64 fixed to the housing 2, and the upper end of the feed screw 65 is connected to a servo motor 66 attached to the housing 61.
Are connected via a joint 67. Servo motor 6
6, the feed screw 65 rotates to move the cylindrical body 62 in the axial direction, and the operating shaft 5 is moved through the bracket 63.
0 is moved in the axial direction with respect to the tool spindle 17A.
【００３０】次に上述した複数穴用中ぐり加工装置の作
動を、図７に示す工程図により説明する。図７の工程ａ
の開始時には、治具テーブル２３は載置されるシリンダ
ブロックＷの第１および第３ボアＷａ１，Ｗａ３が各ク
イル３０Ａ，３０Ｂと同軸的となる位置に割り出されて
おり、各工具主軸１７Ａ，１７Ｂは主軸モータ１８によ
り回転駆動されている。工程ａにおいて、先ず加工済み
のシリンダブロックＷを搬出し未加工のシリンダブロッ
クＷを搬入して治具テーブル２３にクランプした状態
で、作動装置６０により作動軸５０を前進させ、精仕上
げ刃具４６を後退させてその刃先の回転半径を中仕上げ
加工回転半径よりも小とし、中仕上げ刃具４１を前進さ
せてその刃先の回転半径を所定の中仕上げ加工回転半径
とする（工程ａ参照）。この状態でサーボモータ１４に
より主軸ヘッド１３を下降させて工具主軸１７Ａ，１７
ＢをシリンダブロックＷに向けて前進させ、各クイル３
０Ａ，３０Ｂを先ず早送りでシリンダブロックＷに接近
させた後、所定の加工速度で各中仕上げ刃具４１が第１
および第３ボアＷａ１，Ｗａ３を通り抜ける位置まで前
進させる（工程ｂ参照）。これにより、第１および第３
ボアＷａ１，Ｗａ３は先ず荒仕上げ刃具３６により荒仕
上げ加工され、引き続いて各中仕上げ刃具４１により中
仕上げ加工される。次いで作動装置６０により作動軸５
０を多少後退させ、中仕上げ刃具４１を微少量後退させ
てその刃先の回転半径を微少量小さくし（工程ｃ参
照）、各刃具３６，４１，４６の刃先の何れもが中仕上
げ加工された第１および第３ボアＷａ１，Ｗａ３の内面
と接触しないようにした状態で、サーボモータ１４によ
り主軸ヘッド１３を所定の位置まで早戻しして、各クイ
ル３０Ａ，３０Ｂを第１および第３ボアＷａ１，Ｗａ３
から抜き出す。Next, the operation of the above-described boring apparatus for multiple holes will be described with reference to the process chart shown in FIG. Step a in FIG.
Is started, the jig table 23 is indexed to a position where the first and third bores Wa1, Wa3 of the cylinder block W to be placed are coaxial with the quills 30A, 30B, and the tool spindles 17A, 17B is rotationally driven by a spindle motor 18. In step a, the working shaft 50 is advanced by the operating device 60 in a state where the processed cylinder block W is first carried out, the unprocessed cylinder block W is carried in, and clamped on the jig table 23, and the fine finishing blade 46 is removed. It is retracted so that the turning radius of the cutting edge is smaller than the turning radius for semi-finishing, and the semi-finishing cutting tool 41 is advanced to set the turning radius of the cutting edge to a predetermined turning radius for semi-finishing (see step a). In this state, the spindle head 13 is moved down by the servo motor 14 and the tool spindles 17A, 17
B is advanced toward the cylinder block W, and each quill 3
0A and 30B first approach the cylinder block W by rapid traverse, and then each semi-finished cutting tool 41
And it is advanced to a position passing through the third bores Wa1 and Wa3 (see step b). This allows the first and third
The bores Wa <b> 1 and Wa <b> 3 are first rough-finished by the rough-finishing blade 36, and subsequently are semi-finished by the respective semi-finishing blades 41. Next, the operating shaft 5 is operated by the operating device 60.
0 is slightly retracted, and the semi-finished cutting tool 41 is slightly retracted to slightly decrease the turning radius of the cutting edge (see step c), and all the cutting edges of the cutting tools 36, 41, and 46 are semi-finished. The spindle head 13 is quickly returned to a predetermined position by the servomotor 14 in a state where the inner surfaces of the first and third bores Wa1 and Wa3 are not in contact with each other, and the quills 30A and 30B are moved to the first and third bores Wa1. , Wa3
Extract from
【００３１】次いで治具テーブル２３を水平方向に移動
してシリンダブロックＷをその第２および第４ボアＷａ
２，Ｗａ４が各クイル３０Ａ，３０Ｂと同軸的となる位
置に割り出し、作動軸５０を多少前進させ中仕上げ刃具
４１を工程ａと同じ位置まで前進させてその刃先の回転
半径を所定の中仕上げ加工回転半径とする（工程ｄ参
照）。この状態で、前述と同様、サーボモータ１４を作
動させて工具主軸１７Ａ，１７ＢをシリンダブロックＷ
に向けて前進させ、各クイル３０Ａ，３０Ｂを先ず早送
りでシリンダブロックＷに接近させた後、所定の加工速
度で各中仕上げ刃具４１が第２および第４ボアＷａ２，
Ｗａ４を通り抜ける位置まで前進させて、第２および第
４ボアＷａ２，Ｗａ４を荒仕上げ刃具３６により荒仕上
げ加工し、各中仕上げ刃具４１により中仕上げ加工する
（工程ｅ参照）。Next, the jig table 23 is moved in the horizontal direction to move the cylinder block W into the second and fourth bores Wa.
2, Wa4 is indexed to a position coaxial with each of the quills 30A, 30B, the operating shaft 50 is advanced slightly, and the semi-finished cutting tool 41 is advanced to the same position as in the step a, and the turning radius of the cutting edge is set to a predetermined semi-finished processing. The radius of rotation is set (see step d). In this state, as described above, the servomotor 14 is operated to move the tool spindles 17A, 17B to the cylinder block W.
After the quills 30A and 30B are first approached to the cylinder block W by rapid traverse, the semi-finished cutting tools 41 are moved at predetermined processing speeds by the second and fourth bores Wa2 and Wa2.
Then, the second and fourth bores Wa2 and Wa4 are rough-finished by the rough-finishing blade 36, and are semi-finished by the respective semi-finishing blades 41 (see step e).
【００３２】次いで作動装置６０により作動軸５０を後
退させ、中仕上げ刃具４１を後退させてその刃先の回転
半径を中仕上げ加工回転半径よりも小とし、精仕上げ刃
具４６を前進させてその刃先の回転半径を所定の精仕上
げ加工回転半径とする（工程ｆ参照）。そしてサーボモ
ータ１４により工具主軸１７Ａ，１７Ｂを後退させて各
クイル３０Ａ，３０Ｂの精仕上げ刃具４６により第２お
よび第４ボアＷａ２，Ｗａ４の精仕上げ加工を行い（工
程ｇ参照）、引き続き主軸ヘッド１３を所定の位置まで
早戻しして、各クイル３０Ａ，３０Ｂを第１および第３
ボアＷａ１，Ｗａ３から抜き出す。Next, the operating shaft 50 is retracted by the operating device 60, the semi-finished cutting tool 41 is retracted to make the turning radius of the cutting edge smaller than the semi-finishing processing turning radius, and the fine-finishing cutting tool 46 is advanced to advance the cutting edge of the cutting edge. The turning radius is set to a predetermined fine finishing turning radius (see step f). Then, the tool spindles 17A, 17B are retracted by the servomotor 14, and the second and fourth bores Wa2, Wa4 are fine-finished by the fine-finishing blades 46 of the quills 30A, 30B (see step g). Is quickly returned to a predetermined position, and each quill 30A, 30B is moved to the first and third positions.
Pull out from bores Wa1 and Wa3.
【００３３】次いで治具テーブル２３を水平方向に移動
してシリンダブロックＷをその第１および第３ボアＷａ
１，Ｗａ３が各クイル３０Ａ，３０Ｂと同軸的となる位
置に割り出してから、作動軸５０を多少前進させ、精仕
上げ刃具４６を微少量後退させてその刃先の回転半径を
微少量小さくし（工程ｈ参照）、各刃具３６，４１，４
６の刃先の何れもが中仕上げ加工されている第１および
第３ボアＷａ１，Ｗａ３の内面と接触しないようにした
状態で、サーボモータ１４により工具主軸１７Ａ，１７
Ｂを早送り下降して、各精仕上げ刃具４６が第１および
第３ボアＷａ１，Ｗａ３を通り抜ける位置まで各クイル
３０Ａ，３０Ｂを挿入する。Next, the jig table 23 is moved in the horizontal direction to move the cylinder block W into the first and third bores Wa.
After indexing the position where Wa3 and Wa3 are coaxial with the quills 30A and 30B, the operating shaft 50 is advanced slightly, and the fine finishing tool 46 is retracted by a small amount to reduce the turning radius of the cutting edge by a small amount (step). h), each blade tool 36, 41, 4
In a state in which none of the cutting edges 6 is in contact with the inner surfaces of the first and third bores Wa1 and Wa3 which have been subjected to the semi-finishing, the tool spindles 17A and 17
B is fast-forwarded and lowered, and each quill 30A, 30B is inserted to a position where each fine finishing tool 46 passes through the first and third bores Wa1, Wa3.
【００３４】次いで作動軸５０を多少後退させ、精仕上
げ刃具４６を工程ｆと同じ位置まで前進させてその刃先
の回転半径を所定の精仕上げ加工回転半径とする（工程
ｉ参照）。この状態で工程ｇと同様、サーボモータ１４
により工具主軸１７Ａ，１７Ｂを後退させて各クイル３
０Ａ，３０Ｂの精仕上げ刃具４６により第１および第３
ボアＷａ１，Ｗａ３の精仕上げ加工を行い（工程ｊ参
照）、引き続き主軸ヘッド１３を所定の位置まで早戻し
して、各クイル３０Ａ，３０Ｂを第１および第３ボアＷ
ａ１，Ｗａ３から抜き出す。これによりシリンダブロッ
クＷの４個のシリンダボァＷａ１〜Ｗａ４の加工の１サ
イクルが完了して、最初の工程ａに戻る。Next, the operating shaft 50 is slightly retracted, and the fine-finishing blade 46 is advanced to the same position as in step f, so that the turning radius of the cutting edge is set to a predetermined fine-finishing turning radius (see step i). In this state, as in step g, the servo motor 14
The tool spindles 17A and 17B are retracted by the
1A and 3B by the fine finishing blades 46A and 30B.
Fine finishing of the bores Wa1 and Wa3 is performed (see step j), and then the spindle head 13 is quickly returned to a predetermined position, and the quills 30A and 30B are moved to the first and third bores W.
a1, Wa3. Thus, one cycle of machining of the four cylinder bores Wa1 to Wa4 of the cylinder block W is completed, and the process returns to the first step a.
【００３５】上述した実施の形態によれば、全てのシリ
ンダボァＷａ１〜Ｗａ４について中仕上げ加工がなされ
た後に各シリンダボァＷａ１〜Ｗａ４の精仕上げ加工が
なされるので、シリンダブロックＷの剛性が低い場合で
も、精仕上げ加工済みの各シリンダボァＷａ１〜Ｗａ４
がその後に行われる切り込み量の大きい荒仕上げ加工ま
たは中仕上げ加工により生じる残留歪みの影響を受ける
ことはなく、従って精仕上げ加工されたシリンダボァＷ
ａ１〜Ｗａ４を所定の精度に維持することができる。According to the above-described embodiment, since the fine finishing of each of the cylinder bores Wa1 to Wa4 is performed after the semifinishing of all the cylinder bores Wa1 to Wa4, even if the rigidity of the cylinder block W is low, Precision finished cylinder bores Wa1 to Wa4
Is not affected by the residual distortion caused by the subsequent roughing or semi-finishing with a large depth of cut, and therefore the fine-finished cylinder bore W
a1 to Wa4 can be maintained at a predetermined accuracy.
【００３６】前述した従来技術の複数穴用中ぐり加工装
置でも、この実施の形態と同じようにして全てのシリン
ダボァＷａ１〜Ｗａ４について中仕上げ加工がなされた
後に各シリンダボァＷａ１〜Ｗａ４の精仕上げ加工を行
うことは可能である。しかしながら従来技術の複数穴用
中ぐり加工装置では中仕上げ刃具はクイルに固定されて
いるので、工程ｃと工程ｄの間の工具主軸１７Ａ，１７
Ｂの早戻しと、工程ｈと工程ｉの間の工具主軸１７Ａ，
１７Ｂの早送り挿入の際に、中仕上げ刃具の刃先が中仕
上げ加工された第１および第３ボアＷａ１，Ｗａ３の内
面と接触して中仕上げ刃具の寿命を低下させるという問
題が生じる。しかしながらこの実施の形態によれば、工
程ｃと工程ｄの間の工具主軸１７Ａ，１７Ｂの早戻し
と、工程ｈと工程ｉの間の工具主軸１７Ａ，１７Ｂの早
送り挿入の際には、各刃具３６，４１，４６の刃先の何
れもが第１および第３ボアＷａ１，Ｗａ３の内面と接触
することはないので、これらの早戻しと早送り挿入の際
に各刃先がシリンダボァＷａ１，Ｗａ３の内面と接触し
て各刃具３６，４１，４６の寿命を低下させることがな
い。In the above-described conventional boring apparatus for a plurality of holes, the semi-finishing is performed on all the cylinder bores Wa1 to Wa4 in the same manner as in this embodiment, and then the fine finishing is performed on each of the cylinder bores Wa1 to Wa4. It is possible to do. However, in the conventional multi-hole boring apparatus, since the semi-finished cutting tool is fixed to the quill, the tool spindles 17A, 17A between the steps c and d are used.
B and the tool spindles 17A, 17A,
At the time of fast-forward insertion of 17B, there is a problem that the cutting edge of the semi-finished cutting tool comes into contact with the inner surfaces of the first and third bores Wa1 and Wa3 that have been subjected to the semi-finished processing, thereby shortening the life of the semi-finished cutting tool. However, according to this embodiment, when the tool spindles 17A and 17B are quickly returned between step c and step d, and when the tool spindles 17A and 17B are fast-forward inserted between step h and step i, each of the cutting tools is used. Since none of the cutting edges of 36, 41, and 46 comes into contact with the inner surfaces of the first and third bores Wa1 and Wa3, each of the cutting edges is brought into contact with the inner surfaces of the cylinder bores Wa1 and Wa3 at the time of rapid return and rapid feed insertion. The life of each of the blades 36, 41, 46 does not decrease due to contact.
【００３７】２回目に中仕上げ加工されたシリンダボア
Ｗａ２，Ｗａ４については、中仕上げ加工直後に行われ
る工具主軸１７Ａ，１７Ｂの後退により精仕上げ加工を
行っており、これにより加工を行わないストロークは１
回目に中仕上げ加工されたシリンダボァＷａ１，Ｗａ３
についてだけとなるので、加工時間の増大を少なくして
生産性の低下を少なくすることができる。さらにこの実
施の形態では、工程ｃと工程ｄの間および工程ｈと工程
ｉの間の加工がなされないストロークを、それぞれスト
ローク速度が大きい早戻しおよび早送りとしているの
で、生産性の低下は一層少なくなる。As for the cylinder bores Wa2 and Wa4 which have been subjected to the second semi-finishing, fine finishing is performed by retreating the tool spindles 17A and 17B immediately after the semi-finishing.
Cylinder bores Wa1, Wa3 that have been semi-finished the second time
Therefore, the increase in the processing time can be reduced and the decrease in productivity can be reduced. Further, in this embodiment, the strokes in which the processing is not performed between the steps c and d and between the steps h and i are set to the fast-return and the rapid-feed, respectively, at a high stroke speed. Become.
【００３８】またこの実施の形態では、中仕上げ加工回
転半径は作動装置６０のサーボモータ６６により、工程
ａおよび工程ｄの際の作動軸５０の軸線方向位置を変え
ることにより調整することができ、これにより精仕上げ
刃具４６による取り代を調整することも容易である。Further, in this embodiment, the semi-finishing turning radius can be adjusted by changing the axial position of the operating shaft 50 in the steps a and d by the servo motor 66 of the operating device 60. This makes it easy to adjust the margin for the fine finishing blade 46.
【００３９】この実施の形態では、クイル３０Ａ，３０
Ｂに荒仕上げ刃具３６を設けて中仕上げ工程において荒
仕上げ加工をも行うようにしており、このようにすれば
予め行う荒仕上げ加工工程が不要となるので、加工時間
を全体として減少させて生産性を向上させることができ
る。しかしながら本発明は、各ボァＷａ１〜Ｗａ４を予
め荒仕上げしておき、クイル３０Ａ，３０Ｂに荒仕上げ
刃具を設けないようにして実施することも可能である。In this embodiment, the quills 30A, 30
The rough finishing tool 36 is provided in B to perform the rough finishing in the semi-finishing process. In this case, the rough finishing process performed in advance is not required, so that the machining time is reduced as a whole and the production is performed. Performance can be improved. However, the present invention can be practiced in such a manner that the bores Wa1 to Wa4 are rough-finished in advance and the quills 30A and 30B are not provided with the rough-finishing blades.
【００４０】また上記実施の形態では、工具主軸１７
Ａ，１７ＢのピッチはシリンダボァＷａ１〜Ｗａ４のピ
ッチの２倍とし、工具主軸１７Ａ，１７Ｂの本数は２本
として、本発明を直列４気筒の内燃機関のシリンダブロ
ックのシリンダボアの加工に適用ししており、このよう
にすれば全ストローク６回に対し加工を行わないストロ
ークは各１回の戻しストロークおよび挿入ストロークだ
けとなり、加工時間全体に対する加工を行わないストロ
ーク時間の比率が最も小さくなるので、生産性の低下を
最も少なくすることができる。これと同じ効果は、直列
６気筒の内燃機関のシリンダブロックのシリンダボアを
加工するのに、工具主軸１７Ａ，１７Ｂのピッチはシリ
ンダボァＷａのピッチの２倍とし、工具主軸１７Ａ，１
７Ｂの本数は３本として本発明を適用するなど、工具主
軸１７Ａ，１７ＢのピッチはシリンダボァＷａのピッチ
の２倍とし、工具主軸１７Ａ，１７Ｂの本数はシリンダ
ボァＷａ数の半分として本発明を適用しても得ることが
できる。In the above embodiment, the tool spindle 17
The pitch of A and 17B is twice the pitch of cylinder bores Wa1 to Wa4, the number of tool spindles 17A and 17B is two, and the present invention is applied to machining of a cylinder bore of a cylinder block of an in-line four-cylinder internal combustion engine. In this case, the strokes in which the machining is not performed for all six strokes are only one return stroke and the insertion stroke, and the ratio of the stroke time in which the machining is not performed to the entire machining time is the smallest. Sex deterioration can be minimized. The same effect is obtained by machining the cylinder bore of the cylinder block of the in-line six-cylinder internal combustion engine by setting the pitch of the tool spindles 17A, 17B to twice the pitch of the cylinder bore Wa, and setting the tool spindles 17A, 1
The present invention is applied with the pitch of the tool spindles 17A and 17B being twice the pitch of the cylinder bore Wa, and the number of the tool spindles 17A and 17B being half of the number of cylinder bores Wa. Can also be obtained.
【００４１】また上記実施の形態では、各クイル３０
Ａ，３０Ｂ内を軸線方向に進退動して各刃具４１，４６
を半径方向に進退させる１本の作動軸５０を備え、中仕
上げ刃具４１と精仕上げ刃具４６は作動軸５０の進退動
に応じて互いに逆向きに半径方向に進退するよう構成し
たので、各中仕上げ工程、各精仕上げ工程、最後を除く
中仕上げ工程の直後に行う各刃具の後退およびこの中仕
上げ工程で中仕上げされた各穴についての精仕上げ工程
に先立つ各刃具の挿入の際に必要な各刃具の刃先の回転
半径の調整を、１本の作動軸５０の進退動により行うこ
とができ、これにより複数穴用中ぐり加工装置の構造を
簡略化させることができる。In the above embodiment, each quill 30
A, 30B are advanced and retracted in the axial direction, and the respective cutting tools 41, 46
Is provided with one operating shaft 50 for moving back and forth in the radial direction, and the semi-finishing blade 41 and the fine finishing blade 46 are configured to advance and retreat in the radial direction in opposite directions in accordance with the forward and backward movement of the operating shaft 50. Finishing process, each fine finishing process, retraction of each cutting tool performed immediately after the intermediate finishing process except the last, and insertion of each cutting tool prior to the fine finishing process for each hole semi-finished in this intermediate finishing process The rotation radius of the cutting edge of each cutting tool can be adjusted by moving one operating shaft 50 forward and backward, whereby the structure of the multi-hole boring apparatus can be simplified.
【００４２】なお直列６気筒の内燃機関のシリンダブロ
ックのシリンダボアの場合は、工具主軸１７Ａ，１７Ｂ
のピッチはシリンダボァＷａのピッチの３倍とし、工具
主軸１７Ａ，１７Ｂの本数は２本として本発明を適用す
ることもできる。この場合は工程ｂ〜工程ｄを２回繰り
返した後に工程ｅ〜工程ｇを行い、さらに工程ｈ〜工程
ｊを２回繰り返すことになり、全ストローク１０回に対
し加工を行わないストロークは各２回の戻しストローク
および挿入ストロークの４回となる。同様に、直列８気
筒の内燃機関のシリンダブロックのシリンダボアの場合
は、工具主軸１７Ａ，１７ＢのピッチはシリンダボァＷ
ａのピッチの４倍とし、工具主軸１７Ａ，１７Ｂの本数
は２本として本発明を適用することもでき、この場合は
工程ｂ〜工程ｄを３回繰り返した後に工程ｅ〜工程ｇを
行い、さらに工程ｈ〜工程ｊを３回繰り返すことにな
り、全ストローク１４回に対し加工を行わないストロー
クは各３回の戻しストロークおよび挿入ストロークの６
回となる。In the case of a cylinder bore of a cylinder block of an in-line six-cylinder internal combustion engine, the tool spindles 17A, 17B
Is three times the pitch of the cylinder bore Wa, and the number of the tool spindles 17A, 17B is two, and the present invention can be applied. In this case, the steps e to g are performed after the steps b to d are repeated twice, and the steps h to j are further repeated twice. The return stroke and the insertion stroke are four times. Similarly, in the case of a cylinder bore of a cylinder block of an in-line eight-cylinder internal combustion engine, the pitch between the tool spindles 17A and 17B is the cylinder bore W
The present invention can also be applied with the pitch of a being four times as large as the number of the tool spindles 17A and 17B, and in this case, after repeating the steps b to d three times, the steps e to g are performed. Further, the steps h to j are repeated three times, and the stroke in which no machining is performed for all 14 strokes is 6 times of the return stroke and the insertion stroke of each three times.
Times.
【００４３】すなわち一般的には、最後を除く中仕上げ
工程の直後には各刃具４１，４６の各刃先の回転半径を
中仕上げ加工回転半径より小としてクイル３０Ａ，３０
Ｂを後退させ、最後の中仕上げ工程の終了直後に精仕上
げ刃具４６の刃先を精仕上げ加工回転半径としてクイル
３０Ａ，３０Ｂを後退させて最初の精仕上げ工程を行
い、最後を除く中仕上げ工程で中仕上げ加工された各シ
リンダボァＷａについては各刃具４１，４６の各刃先の
回転半径を中仕上げ加工回転半径より小としてクイル３
０Ａ，３０Ｂを各シリンダボァＷａに前進挿入してから
精仕上げ刃具４６の刃先の回転半径を精仕上げ加工回転
半径として後退させる精仕上げ工程により行う。That is, generally, immediately after the semi-finishing process except the last, the turning radius of each cutting edge of each cutting tool 41, 46 is set smaller than the semi-finishing turning radius, and the quills 30A, 30 are turned off.
B is retracted, and immediately after the end of the final semi-finishing process, the quills 30A and 30B are retracted using the cutting edge of the fine-finishing blade 46 as a fine-finishing turning radius to perform the first fine finishing process. For each of the semi-finished cylinder bores Wa, the turning radius of each cutting edge of each of the cutting tools 41 and 46 is set to be smaller than the semi-finishing turning radius.
This is performed by a fine finishing step of inserting the rotary blades 0A and 30B into the respective cylinder bores Wa and then retracting the rotational radius of the blade of the fine finishing blade 46 as a fine finishing rotational radius.
【００４４】上述した実施の形態は、本発明をシリンダ
ブロックＷのシリンダボァＷａの加工に適用した場合に
ついて説明したが、本発明はこれに限らず、１つのワー
クＷに互いに平行に同一ピッチで並んだ複数個の穴Ｗａ
を加工する場合に適用することができる。In the above-described embodiment, the case where the present invention is applied to the machining of the cylinder bore Wa of the cylinder block W has been described. However, the present invention is not limited to this, and is arranged in parallel with one work W at the same pitch. A plurality of holes Wa
It can be applied when processing.
【００４５】また上述した各実施の形態は、複数の工具
主軸にそれぞれクイルを装着して工具主軸と同数の穴を
同時に加工する場合について説明したが、本発明はこれ
に限らず、１本の工具主軸にクイルを装着して穴を１つ
ずつ加工する場合に適用することもでき、この場合にも
前述と同様、ワークの剛性が低い場合でも精仕上げ加工
された穴を所定の精度に維持することができる、加工を
行わない軸線方向後退と挿入の際に各刃先が穴の内面と
接触して各刃具の寿命を低下させることがない、加工を
行わないストロークが減少するので加工時間の増大を少
なくして生産性の低下を少なくすることができるという
各効果を得ることができる。In each of the above-described embodiments, a case has been described in which a quill is attached to each of a plurality of tool spindles and the same number of holes as the tool spindles are simultaneously machined. However, the present invention is not limited to this, and one tool is used. It can also be applied to the case where a quill is attached to the tool spindle and holes are machined one by one. In this case as well, even if the rigidity of the work is low, the holes that have been fine-finished are maintained at a predetermined accuracy. It is possible to reduce the life of each cutting tool due to the fact that each cutting edge does not contact the inner surface of the hole during axial retraction and insertion without processing, the stroke without processing is reduced, so the processing time is reduced. Each effect that the increase can be reduced and the decrease in productivity can be reduced can be obtained.
【００４６】なお、刃具およびこれを取り付けるクイル
の軸線方向移動はワークに対する相対的移動であり、上
述した実施の形態のように工具主軸を移動させて刃具お
よびクイルをワークに対し移動させるだけでなく、ワー
クＷを支持する治具テーブル２３を移動させて刃具およ
びクイルをワークに対し移動させるものも本発明の技術
的思想に含まれることは勿論である。The axial movement of the cutting tool and the quill to which the cutting tool is attached is a relative movement with respect to the work. In addition to moving the tool main shaft to move the cutting tool and the quill relative to the work as in the above-described embodiment, It is needless to say that the jig table 23 for supporting the work W is moved to move the cutting tool and the quill with respect to the work.
【００４７】[0047]
【発明の効果】請求項１および請求項１１の複数穴の加
工方法によれば、全ての穴について中仕上げ加工がなさ
れた後に各穴の精仕上げ加工がなされるので、精仕上げ
加工済みの穴がその後に行われる切り込み量の大きい中
仕上げ加工により生じる残留歪みの影響を受けるような
ことはなくなり、従ってワークの剛性が低い場合でも精
仕上げ加工された穴を所定の精度に維持することができ
る。また最後を除く中仕上げ工程の直後に行う各刃具の
軸線方向後退と、この中仕上げ工程で中仕上げされた各
穴についての精仕上げ工程に先立つ各刃具の挿入は、各
刃具の刃先の回転半径を中仕上げ加工回転半径より小と
して行っているので、これらの軸線方向後退と挿入の際
に各刃先が穴の内面と接触して各刃具の寿命を低下させ
ることがない。また最後に中仕上げ加工された穴につい
ては、中仕上げ加工直後に行われる各刃具の軸線方向後
退により精仕上げ加工を行っており、これにより加工を
行わないストロークが減少するので、加工時間の増大を
少なくして生産性の低下を少なくすることができる。According to the method for machining a plurality of holes according to the first and the eleventh aspects, the fine finishing of each hole is performed after the semi-finishing of all the holes. Will not be affected by residual strains caused by the subsequent large-finishing semi-finishing, so that even when the rigidity of the workpiece is low, the finely-finished hole can be maintained at a predetermined accuracy. . Also, the retraction of each cutting tool in the axial direction performed immediately after the semi-finishing process except the last, and the insertion of each cutting tool prior to the fine finishing process for each hole semi-finished in this semi-finishing process are performed using the turning radius of the cutting edge of each cutting tool. Is smaller than the semi-finishing turning radius, so that the cutting edge does not come into contact with the inner surface of the hole during the axial retreat and insertion, thereby reducing the life of each cutting tool. In addition, for holes that have been finally semi-finished, fine finishing is performed by the axial retraction of each cutting tool that is performed immediately after semi-finished machining, which reduces the number of strokes that are not machined and increases machining time. And the decrease in productivity can be reduced.
【００４８】請求項２の複数穴の加工方法によれば、内
燃機関のシリンダブロックの剛性が低い場合でも、精仕
上げ加工されたシリンダボアを所定の精度に維持するこ
とができ、各刃具の刃先が穴の内面と接触して各刃具の
寿命を低下させることがなく、また加工時間の増大を少
なくして生産性の低下を少なくすることができる。According to the method of machining a plurality of holes according to the second aspect, even when the rigidity of the cylinder block of the internal combustion engine is low, it is possible to maintain the precision-finished cylinder bore with a predetermined accuracy, and the cutting edge of each cutting tool is reduced. The life of each cutting tool is not reduced by contact with the inner surface of the hole, and the increase in machining time can be reduced to reduce the decrease in productivity.
【００４９】請求項３の複数穴の加工方法によれば、加
工を行わないときのストローク速度が増大されるので、
加工時間の増大をさらに少なくして生産性の低下を一層
少なくすることができる。According to the method of machining a plurality of holes according to the third aspect, the stroke speed when machining is not performed is increased.
The increase in the processing time can be further reduced, and the decrease in productivity can be further reduced.
【００５０】請求項４の複数穴の加工方法によれば、中
仕上げ工程において荒仕上げ加工を行うことにより、予
め行う荒仕上げ加工工程が不要となるので、加工時間を
全体として減少させて生産性を向上させることができ
る。According to the method for machining a plurality of holes according to the fourth aspect, the rough finishing is performed in the semi-finishing step, thereby eliminating the need for a rough finishing step performed in advance. Can be improved.
【００５１】請求項５の複数穴の加工方法によれば、加
工を行わないストロークは各１回の戻しストロークおよ
び挿入ストロークだけとなり、加工時間全体に対する加
工を行わないストローク時間の比率が最も小さくなるの
で、生産性の低下を最も少なくすることができる。According to the method of machining a plurality of holes according to the fifth aspect, the strokes in which the machining is not performed are only one return stroke and the insertion stroke, and the ratio of the stroke time in which the machining is not performed to the entire machining time is the smallest. Therefore, the decrease in productivity can be minimized.
【００５２】また請求項６および請求項１２の複数穴用
中ぐり加工装置によれば、中仕上げ刃具をその刃先の回
転半径が所定の中仕上げ加工回転半径とそれより小さい
回転半径の間で変化するように半径方向に進退可能と
し、精仕上げ刃具はその刃先の回転半径が中仕上げ加工
回転半径より大きい所定の精仕上げ加工回転半径と同中
仕上げ加工回転半径より小さい回転半径の間で変化する
ように半径方向に進退可能としたので、全ての穴につい
て中仕上げ加工がなされた後に各穴の精仕上げ加工がな
されるのに加えて、最後に中仕上げ加工された穴につい
ては中仕上げ加工直後の各刃具の軸線方向後退により精
仕上げ加工を行い、最後を除く中仕上げ工程の直後に行
う各刃具の軸線方向後退と、この中仕上げ工程で中仕上
げされた各穴についての精仕上げ工程に先立つ各刃具の
挿入は、各刃具の刃先の回転半径を中仕上げ加工回転半
径より小として行うという、請求項１の複数穴の加工方
法を実施することができ、これにより上述した請求項１
による効果を全て得ることができる。According to the boring device for multiple holes according to the sixth and twelfth aspects, the turning radius of the semi-finished cutting tool is changed between a predetermined turning radius of the semi-finishing process and a smaller turning radius. So that the turning radius of the blade changes between a predetermined finishing turning radius larger than the semi-finishing turning radius and a turning radius smaller than the semi-finishing turning radius. As it is possible to advance and retreat in the radial direction as described above, in addition to performing fine finishing of each hole after semi-finishing is performed for all holes, immediately after semi-finishing for the last semi-finished hole Fine finishing is performed by retreating each cutting tool in the axial direction, and the axial retreat of each cutting tool performed immediately after the semi-finishing process excluding the last process is performed. Insertion of each cutting tool prior to the fine finishing step is performed with the turning radius of the cutting edge of each cutting tool smaller than the semi-finishing turning radius. Claim 1
All the effects of the above can be obtained.
【００５３】請求項７の複数穴用中ぐり加工装置によれ
ば、内燃機関のシリンダブロックの剛性が低い場合で
も、精仕上げ加工されたシリンダボアを所定の精度に維
持することができ、各刃具の刃先が穴の内面と接触して
各刃具の寿命を低下させることがなく、また加工時間の
増大を少なくして生産性の低下を少なくすることができ
る。According to the multi-hole boring apparatus of claim 7, even when the rigidity of the cylinder block of the internal combustion engine is low, the precision-finished cylinder bore can be maintained at a predetermined accuracy, and each of the cutting tools can be maintained. The cutting edge does not come into contact with the inner surface of the hole to reduce the life of each cutting tool, and it is possible to reduce the increase in machining time and the decrease in productivity.
【００５４】請求項８の複数穴用中ぐり加工装置によれ
ば、各中仕上げ工程、各精仕上げ工程、最後を除く中仕
上げ工程の直後に行う各刃具の後退およびこの中仕上げ
工程で中仕上げされた各穴についての精仕上げ工程に先
立つ各刃具の挿入の際に必要な各刃具の刃先の回転半径
の調整を、１本の作動軸の進退動により行うことができ
るので、複数穴用中ぐり加工装置の構造を簡略化させる
ことができる。According to the multi-hole boring apparatus of the eighth aspect, each cutting tool is retracted immediately after each of the semi-finishing steps, each of the fine finishing steps, and the semi-finishing step except the last, and the semi-finishing is performed in the semi-finishing step. Adjustment of the turning radius of the cutting edge of each cutting tool required at the time of insertion of each cutting tool prior to the fine finishing process for each hole performed can be performed by moving one operating shaft forward and backward. The structure of the boring device can be simplified.
【００５５】請求項９の複数穴用中ぐり加工装置によれ
ば、中仕上げ工程において荒仕上げ加工を行うことが可
能となり、これにより予め行う荒仕上げ加工工程が不要
となるので、加工時間を全体として減少させて生産性を
向上させることができる。According to the multi-hole boring apparatus of the ninth aspect, it is possible to perform rough finishing in the semi-finishing step, thereby eliminating the need for a pre-rough finishing step, thereby reducing the processing time. As a result, the productivity can be improved.
【００５６】請求項１０の複数穴用中ぐり加工装置によ
れば、加工時間全体に対する最後の中仕上げ加工直後の
各刃具の後退による精仕上げ加工時間の比率が最も大き
くなり、これにより加工を行わないストローク時間の比
率が最も少なくなるので、生産性の低下を最も少なくす
ることができる。According to the multi-hole boring apparatus of the tenth aspect, the ratio of the fine finishing processing time due to the retreat of each cutting tool immediately after the last semi-finishing processing to the entire processing time becomes the largest, thereby performing the processing. Since the ratio of no stroke time is minimized, the decrease in productivity can be minimized.
【図１】 本発明による複数穴用中ぐり加工装置の一実
施形態の全体構造を示す側面図である。FIG. 1 is a side view showing the overall structure of an embodiment of a multiple-hole boring apparatus according to the present invention.
【図２】 図１に示す複数穴用中ぐり加工装置の下半部
を示す正面図である。FIG. 2 is a front view showing a lower half of the multi-hole boring apparatus shown in FIG. 1;
【図３】 図２の３−３線に沿った拡大断面図である。FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2;
【図４】 図３の４−４断面図である。FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;
【図５】 図３の５−５断面図である。FIG. 5 is a sectional view taken along line 5-5 in FIG. 3;
【図６】 図１に示す複数穴用中ぐり加工装置の各刃具
を半径方向に進退させる作動軸の作動装置である。6 is an operating device of an operating shaft for moving each cutting tool of the multi-hole boring apparatus shown in FIG. 1 in a radial direction.
【図７】 本発明による複数穴の加工方法を示す工程図
である。FIG. 7 is a process chart showing a method for processing a plurality of holes according to the present invention.
【図８】 従来技術による複数穴の加工方法を示す工程
図である。FIG. 8 is a process diagram showing a method for processing a plurality of holes according to a conventional technique.
１７Ａ，１７Ｂ…工具主軸、２０…治具ユニット、３０
Ａ，３０Ｂ…クイル、３６…荒仕上げ刃具、４１…中仕
上げ刃具、４６…精仕上げ刃具、５０…作動軸、Ｗ…ワ
ーク（シリンダブロック）、Ｗａ１〜Ｗａ４…穴（シリ
ンダボァ）。17A, 17B: tool spindle, 20: jig unit, 30
A, 30B: Quill, 36: Rough finishing tool, 41: Medium finishing tool, 46: Fine finishing tool, 50: Working shaft, W: Workpiece (cylinder block), Wa1 to Wa4: Hole (cylinder bore).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 辰美 愛知県刈谷市朝日町１丁目１番地 豊田工 機株式会社内 (72)発明者 下之薗 勝紀 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 Ｆターム(参考） 3C036 AA00 3C046 LL07 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsumi Kato 1-1-1, Asahi-cho, Kariya-shi, Aichi Prefecture Inside Toyota Machine Works Co., Ltd. F-term (reference) 3C036 AA00 3C046 LL07
Claims (12)
で並んだ複数個の穴を加工する方法であって、前記穴の
個数の整数分の一の本数でかつ前記穴のピッチの整数倍
のピッチで互いに平行に並んだ回転軸線を中心として一
緒に回転する中仕上げ刃具および精仕上げ刃具を前記回
転軸線方向に移動して、その刃具では未加工の前記穴に
順次挿入して加工する複数穴の加工方法において、 前記各穴の中仕上げ加工は、前記中仕上げ刃具の刃先を
所定の中仕上げ加工回転半径とし、かつ前記精仕上げ刃
具の刃先の回転半径を前記中仕上げ加工回転半径より小
として、前記各刃具を前記中仕上げ刃具では未加工の前
記穴に順次前進挿入する複数の中仕上げ工程により行
い、 最後を除く前記中仕上げ工程の直後には前記各刃具は各
刃先の回転半径を前記中仕上げ加工回転半径より小とし
て軸線方向に後退させ、 前記各穴の精仕上げ加工は、最後の前記中仕上げ工程の
終了直後に前記精仕上げ刃具の刃先の回転半径を前記中
仕上げ加工回転半径より大きい所定の精仕上げ加工回転
半径として各刃具を軸線方向に後退させる最初の精仕上
げ工程により先ず最後に中仕上げ加工された穴について
行い、最後を除く前記中仕上げ工程で中仕上げ加工され
た各穴については前記各刃具の各刃先の回転半径を前記
中仕上げ加工回転半径より小として各穴に前進挿入して
から前記精仕上げ刃具の刃先の回転半径を前記精仕上げ
加工回転半径として軸線方向に後退させる精仕上げ工程
により行うことを特徴とする複数穴の加工方法。1. A method of processing a plurality of holes arranged in parallel at the same pitch in one work, wherein the number of holes is a fraction of the number of holes and an integral multiple of the pitch of the holes. A plurality of holes, which are formed by moving a semi-finishing tool and a fine-finishing tool that rotate together about a rotation axis lined up in parallel with each other at a pitch in the direction of the rotation axis, and sequentially inserting and processing the uncut holes in the tool. In the machining method, the semi-finishing of each hole is performed by setting a cutting edge of the semi-finished cutting tool to a predetermined semi-finishing turning radius, and a turning radius of the cutting edge of the fine finishing cutting tool to be smaller than the semi-finishing turning radius. In the semi-finished cutting tool, each of the cutting tools is moved forward by a plurality of semi-finishing steps in which the cutting tools are sequentially inserted into the unprocessed holes. Retreating in the axial direction as smaller than the semi-finishing turning radius, the fine finishing of each hole, the turning radius of the cutting edge of the fine finishing cutting tool is shorter than the semi-finishing turning radius immediately after the end of the last semi-finishing process. The first semi-finishing process in the first fine finishing step of retreating each cutting tool in the axial direction as a large predetermined fine finishing turning radius is performed on the last semi-finished hole, and each hole except the last is semi-finished in the semi-finishing process. About the turning radius of each cutting edge of each cutting tool is smaller than the intermediate finishing turning radius, and the blade is advanced forwardly into each hole, and then the turning radius of the cutting edge of the fine finishing cutting tool is retreated in the axial direction as the fine finishing turning radius. A method of processing a plurality of holes, which is performed by a fine finishing step.
いて、前記ワークは内燃機関のシリンダブロックであ
り、前記複数個の穴は整列して配置された４個以上の偶
数個のシリンダボアである複数穴の加工方法。2. The method according to claim 1, wherein the workpiece is a cylinder block of an internal combustion engine, and the plurality of holes are four or more even-numbered cylinder bores arranged in alignment. A method of machining a certain hole.
の加工方法において、前記最後を除く中仕上げ工程の直
後に行う前記各刃具の後退は早戻しにより行い、前記最
後を除く中仕上げ工程で中仕上げされた各穴についての
前記精仕上げ工程に先立つ前記各刃具の挿入は早送りに
より行うことを特徴とする複数穴の加工方法。3. The method for machining a plurality of holes according to claim 1, wherein the retreating of each of the cutting tools performed immediately after the semi-finishing step except for the last is performed by quick return, and the semi-finishing except for the last. A method of machining a plurality of holes, wherein the insertion of each of the cutting tools prior to the fine finishing step for each of the semi-finished holes in the step is performed by rapid traverse.
の複数穴の加工方法において、前記各回転軸線を中心と
して前記各刃具と一緒に回転し刃先の回転半径が前記中
仕上げ加工回転半径より小さくかつ前記中仕上げ刃具よ
り前進方向前側に位置する荒仕上げ刃具により、前記中
仕上げ工程において前記穴の荒仕上げ加工をも行うこと
を特徴とする複数穴の加工方法。4. The method for processing a plurality of holes according to claim 1, wherein the cutting tool is rotated around the respective rotation axes together with the respective cutting tools, and the turning radius of the cutting edge is the semi-finishing. A method for machining a plurality of holes, wherein the rough finishing of the hole is also performed in the semi-finishing step by using a rough finishing tool which is smaller than a processing rotation radius and located forward of the semi-finishing tool in the forward direction.
の複数穴の加工方法において、前記回転軸線のピッチは
前記複数個の穴のピッチの２倍であり、前記回転軸線の
本数は前記複数個の穴の個数の半分であることを特徴と
する複数穴の加工方法。5. The method for processing a plurality of holes according to claim 1, wherein a pitch of the rotation axis is twice as large as a pitch of the plurality of holes. The method of processing a plurality of holes, wherein the number is half of the number of the plurality of holes.
で並んだ複数個の穴を加工する中ぐり加工装置であっ
て、前記穴の個数の整数分の一の本数でかつ前記穴のピ
ッチの整数倍のピッチで互いに平行に並んで回転軸線方
向に進退動される工具主軸と、この各工具主軸の先端に
装着されそれぞれ中仕上げ刃具および精仕上げ刃具を備
えたクイルと、前記ワークを支持するとともに前記各工
具主軸に対しそれらの回転軸線を結ぶ方向に相対的に移
動可能な治具ユニットを備えてなる複数穴用中ぐり加工
装置において、前記中仕上げ刃具はその刃先の回転半径
が所定の中仕上げ加工回転半径とそれより小さい回転半
径の間で変化するように半径方向に進退可能とし、前記
精仕上げ刃具はその刃先の回転半径が前記中仕上げ加工
回転半径より大きい所定の精仕上げ加工回転半径と同中
仕上げ加工回転半径より小さい回転半径の間で変化する
ように半径方向に進退可能としたことを特徴とする複数
穴用中ぐり加工装置。6. A boring apparatus for processing a plurality of holes arranged in parallel at the same pitch in one work, wherein the number of holes is an integral number of the number of holes and the number of holes is smaller than the number of holes. A tool spindle which is arranged in parallel with each other at a pitch of an integral multiple and which is moved forward and backward in the direction of the rotation axis, a quill which is attached to the tip of each tool spindle and has a semi-finishing tool and a fine finishing tool, and supports the work. In addition, in the multi-hole boring apparatus including a jig unit that is relatively movable in a direction connecting their rotation axes with respect to each of the tool spindles, the semi-finished cutting tool has a rotation radius of a cutting edge thereof is a predetermined radius. It is possible to advance and retreat in the radial direction so as to change between a semi-finishing turning radius and a smaller turning radius, and the fine-finishing blade has a cutting edge whose turning radius is larger than the semi-finishing turning radius. A multi-hole boring machine characterized in that it is capable of moving back and forth in the radial direction so as to change between a fixed fine turning radius and a smaller turning radius.
置において、前記ワークは内燃機関のシリンダブロック
であり、前記複数個の穴は整列して配置された４個以上
の偶数個のシリンダボアである複数穴用中ぐり加工装
置。7. The boring device for a plurality of holes according to claim 6, wherein the work is a cylinder block of an internal combustion engine, and the plurality of holes are four or more even-numbered holes arranged in alignment. Boring machine for multiple holes with a cylinder bore.
用中ぐり加工装置において、前記各クイル内を軸線方向
に進退動して前記各刃具を半径方向に進退させる１本の
作動軸を備え、前記中仕上げ刃具と精仕上げ刃具は前記
作動軸の進退動に応じて互いに逆向きに半径方向に進退
するよう構成したことを特徴とする複数穴用中ぐり加工
装置。8. The multi-hole boring apparatus according to claim 6, wherein one operating shaft moves in and out of each of the quills in the axial direction and moves each of the cutting tools in the radial direction. Wherein the semi-finishing blade and the fine finishing blade are configured to advance and retreat in the radial direction in opposite directions to each other in accordance with advance and retreat of the operating shaft.
の複数穴用中ぐり加工装置において、前記各クイルに
は、刃先の回転半径が前記中仕上げ加工回転半径より小
さくかつ前記中仕上げ刃具より前進方向前側に位置する
荒仕上げ刃具をさらに設けたことを特徴とする複数穴用
中ぐり加工装置。9. The multi-hole boring apparatus according to claim 6, wherein each of the quills has a turning radius of a cutting edge smaller than the semi-finishing turning radius. A boring device for a plurality of holes, further comprising a rough finishing tool positioned forward of the semi-finishing tool in the forward direction.
載の複数穴用中ぐり加工装置において、前記工具主軸の
ピッチは前記複数個の穴のピッチの２倍であり、前記工
具主軸の本数は前記複数個の穴の個数の半分であること
を特徴とする複数穴用中ぐり加工装置。10. The multi-hole boring apparatus according to claim 6, wherein a pitch of the tool spindle is twice as large as a pitch of the plurality of holes. A boring device for a plurality of holes, wherein the number of spindles is half the number of the plurality of holes.
数個の穴を加工する方法であって、１本の回転軸線を中
心として一緒に回転する中仕上げ刃具および精仕上げ刃
具を前記回転軸線方向に移動して、その刃具では未加工
の前記穴に順次挿入して加工する複数穴の加工方法にお
いて、 前記各穴の中仕上げ加工は、前記中仕上げ刃具の刃先を
所定の中仕上げ加工回転半径とし、かつ前記精仕上げ刃
具の刃先の回転半径を前記中仕上げ加工回転半径より小
として、前記各刃具を前記中仕上げ刃具では未加工の前
記穴に順次前進挿入する複数の中仕上げ工程により行
い、 最後を除く前記中仕上げ工程の直後には前記各刃具は各
刃先の回転半径を前記中仕上げ加工回転半径より小とし
て軸線方向に後退させ、 前記各穴の精仕上げ加工は、最後の前記中仕上げ工程の
終了直後に前記精仕上げ刃具の刃先の回転半径を前記中
仕上げ加工回転半径より大きい所定の精仕上げ加工回転
半径として各刃具を軸線方向に後退させる最初の精仕上
げ工程により先ず最後に中仕上げ加工された穴について
行い、最後を除く前記中仕上げ工程で中仕上げ加工され
た各穴については前記各刃具の各刃先の回転半径を前記
中仕上げ加工回転半径より小として各穴に前進挿入して
から前記精仕上げ刃具の刃先の回転半径を前記精仕上げ
加工回転半径として軸線方向に後退させる精仕上げ工程
により行うことを特徴とする複数穴の加工方法。11. A method of machining a plurality of holes arranged in parallel in one work, wherein the semi-finishing tool and the fine finishing tool which rotate together around one rotation axis are arranged in the rotation axis direction. In the multi-hole machining method of sequentially inserting and machining the unprocessed hole with the cutting tool, the semi-finishing of each hole is performed by setting a cutting edge of the semi-finishing tool to a predetermined semi-finishing turning radius. And, the turning radius of the blade edge of the fine finishing blade is smaller than the semi-finishing turning radius, the semi-finished cutting tool is performed by a plurality of semi-finishing steps to sequentially advance and insert into the unprocessed hole in the semi-finishing cutting tool, Immediately after the semi-finishing process except the last, the respective cutting tools are retreated in the axial direction with the turning radius of each cutting edge being smaller than the semi-finishing turning radius, and the fine finishing of the respective holes is the last Immediately after the completion of the semi-finishing step, the first fine finishing step of retreating each cutting tool in the axial direction with the turning radius of the cutting edge of the fine finishing tool being a predetermined fine finishing turning radius larger than the semi-finishing turning radius is finally performed. Performed on the holes subjected to semi-finishing, and for each hole semi-finished in the above-mentioned semi-finishing process except for the last, insert the turning radius of each cutting edge of each cutting tool smaller than the semi-finishing turning radius and insert it into each hole forward. A method of machining a plurality of holes, wherein the machining is performed in a fine finishing step in which the turning radius of the cutting edge of the fine finishing blade is retracted in the axial direction as the fine finishing turning radius.
数個の穴を加工する中ぐり加工装置であって、回転軸線
方向に進退動される工具主軸の先端に装着されそれぞれ
中仕上げ刃具および精仕上げ刃具を備えたクイルと、前
記ワークを支持するとともに前記各工具主軸に対し前記
複数個の穴の軸線を結ぶ方向に相対的に移動可能な治具
ユニットを備えてなる複数穴用中ぐり加工装置におい
て、前記中仕上げ刃具はその刃先の回転半径が所定の中
仕上げ加工回転半径とそれより小さい回転半径の間で変
化するように半径方向に進退可能とし、前記精仕上げ刃
具はその刃先の回転半径が前記中仕上げ加工回転半径よ
り大きい所定の精仕上げ加工回転半径と同中仕上げ加工
回転半径より小さい回転半径の間で変化するように半径
方向に進退可能としたことを特徴とする複数穴用中ぐり
加工装置。12. A boring machine for machining a plurality of holes arranged in parallel with one another on a single workpiece, wherein the semi-finishing tool and the fine machining tool are mounted on the tip of a tool spindle which is moved forward and backward in the direction of the rotation axis. A multi-hole boring process comprising: a quill having a finishing blade, and a jig unit that supports the work and is relatively movable in a direction connecting the axes of the plurality of holes with respect to the tool spindles. In the apparatus, the semi-finished cutting tool is capable of moving forward and backward in a radial direction so that a turning radius of the cutting edge changes between a predetermined semi-finishing processing turning radius and a smaller turning radius, and the fine finishing cutting tool rotates the cutting edge. It is possible to advance and retreat in the radial direction so that the radius changes between a predetermined fine finishing turning radius larger than the semi-finishing turning radius and a turning radius smaller than the semi-finishing turning radius. A boring device for multiple holes.
Priority Applications (1)
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|---|---|---|---|
| JP2001121382A JP4576069B2 (en) | 2001-04-19 | 2001-04-19 | Multi-hole machining method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001121382A JP4576069B2 (en) | 2001-04-19 | 2001-04-19 | Multi-hole machining method |
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|---|---|
| JP2002307216A true JP2002307216A (en) | 2002-10-23 |
| JP4576069B2 JP4576069B2 (en) | 2010-11-04 |
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ID=18971269
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| Country | Link |
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| US6846136B2 (en) * | 2002-08-06 | 2005-01-25 | Velenite Inc. | Rotatable cutting tool |
| JP2006130588A (en) * | 2004-11-04 | 2006-05-25 | Fuji Seiko Ltd | Holder of cutting tool for finishing inner diameter and holder of cutting tool for machining inner diameter |
| JP2006263829A (en) * | 2005-03-22 | 2006-10-05 | Mitsubishi Materials Corp | Cutting tool |
| JP2006263828A (en) * | 2005-03-22 | 2006-10-05 | Mitsubishi Materials Corp | Cutting tool |
| WO2010046754A1 (en) * | 2008-10-22 | 2010-04-29 | Toyota Jidosha Kabushiki Kaisha | Boring apparatus and hole machining method |
| JP2010094776A (en) * | 2008-10-16 | 2010-04-30 | Fuji Seiko Ltd | Boring machining tool and boring machining method |
| JP2010532277A (en) * | 2007-07-05 | 2010-10-07 | サンドビック，インコーポレイティド | Material removal tool |
| WO2012067039A1 (en) * | 2010-11-17 | 2012-05-24 | 三菱重工業株式会社 | Hole drilling device, and method |
| US8469639B2 (en) | 2007-05-31 | 2013-06-25 | Valenite, Llc | Actuated material removal tool |
| US8596938B2 (en) | 2008-07-18 | 2013-12-03 | Valenite Llc | Backbore tool with coolant actuation |
| JP2014108473A (en) * | 2012-11-30 | 2014-06-12 | Honda Motor Co Ltd | Boring method and boring device |
| CN112775622A (en) * | 2020-12-24 | 2021-05-11 | 昆山施宝得精密模具有限公司 | High-precision processing technology for hole positions of porous plates |
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| JPS59151603U (en) * | 1983-03-31 | 1984-10-11 | 株式会社小松製作所 | Tools in variable tool diameter spindle devices |
| JPH04304913A (en) * | 1991-03-29 | 1992-10-28 | Toyoda Mach Works Ltd | Hole machining method |
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| US6846136B2 (en) * | 2002-08-06 | 2005-01-25 | Velenite Inc. | Rotatable cutting tool |
| JP2006130588A (en) * | 2004-11-04 | 2006-05-25 | Fuji Seiko Ltd | Holder of cutting tool for finishing inner diameter and holder of cutting tool for machining inner diameter |
| JP2006263829A (en) * | 2005-03-22 | 2006-10-05 | Mitsubishi Materials Corp | Cutting tool |
| JP2006263828A (en) * | 2005-03-22 | 2006-10-05 | Mitsubishi Materials Corp | Cutting tool |
| US8469639B2 (en) | 2007-05-31 | 2013-06-25 | Valenite, Llc | Actuated material removal tool |
| JP2010532277A (en) * | 2007-07-05 | 2010-10-07 | サンドビック，インコーポレイティド | Material removal tool |
| KR101486614B1 (en) * | 2007-07-05 | 2015-01-26 | 산드빅 인코퍼레이티드 | Actuated Material Removal Tool |
| US9050657B2 (en) | 2007-07-05 | 2015-06-09 | Sandvik, Inc. | Actuated material removal tool |
| US8596938B2 (en) | 2008-07-18 | 2013-12-03 | Valenite Llc | Backbore tool with coolant actuation |
| JP2010094776A (en) * | 2008-10-16 | 2010-04-30 | Fuji Seiko Ltd | Boring machining tool and boring machining method |
| JP2010099762A (en) * | 2008-10-22 | 2010-05-06 | Jtekt Corp | Boring device and drilling method |
| WO2010046754A1 (en) * | 2008-10-22 | 2010-04-29 | Toyota Jidosha Kabushiki Kaisha | Boring apparatus and hole machining method |
| WO2012067039A1 (en) * | 2010-11-17 | 2012-05-24 | 三菱重工業株式会社 | Hole drilling device, and method |
| JP2014108473A (en) * | 2012-11-30 | 2014-06-12 | Honda Motor Co Ltd | Boring method and boring device |
| CN112775622A (en) * | 2020-12-24 | 2021-05-11 | 昆山施宝得精密模具有限公司 | High-precision processing technology for hole positions of porous plates |
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