JP2008142826A - Cutting method, cutting device, and cutting tool - Google Patents

Cutting method, cutting device, and cutting tool Download PDF

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JP2008142826A
JP2008142826A JP2006332018A JP2006332018A JP2008142826A JP 2008142826 A JP2008142826 A JP 2008142826A JP 2006332018 A JP2006332018 A JP 2006332018A JP 2006332018 A JP2006332018 A JP 2006332018A JP 2008142826 A JP2008142826 A JP 2008142826A
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hole
cutting
groove
tool
valve lifter
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JP4935333B2 (en
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Hiroshi Fujii
啓 藤井
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance productivity by performing, in a short time, cutting in the inner surface of a drilled hole formed in a work and a grooving in the end surface portion of the work positioned forward of the drilled hole in the axial direction. <P>SOLUTION: In this cutting tool 1, a cutting edge 5 for drilling a valve lifter hole 9a formed in a cylinder head 9 is formed on the end outer peripheral part of a tool body 3, and a cutting edge 7 for grooving a spring seat groove 9c in the end surface 9b of the cylinder head 9 positioned forward of the valve lifter hole 9a is formed at the end of the tool body 3. While rotating the cutting tool 1, the cutting tool is inserted into the valve lifter hole 9a, the valve lifter hole 9a is cut by the cutting edge 5 for drilling. After the cutting, the spring seat groove 9c is formed in the end surface portion 9b by the cutting edge 7 for grooving. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ワークに形成してある被加工孔の内面を切削加工するとともに、被加工孔の軸線方向前方に位置するワークの端面部位に溝を切削加工する切削加工方法および切削加工装置ならびに切削工具に関する。   The present invention relates to a cutting method, a cutting apparatus, and a cutting method for cutting an inner surface of a hole formed in a workpiece and cutting a groove in an end surface portion of the workpiece positioned in front of the hole in the axial direction. Related to tools.

エンジンのシリンダヘッドにおいて、バルブリフタが挿入されるバルブリフタ孔の内面切削加工および、バルブリフタ孔の軸線方向前方の端面部位に対するバルブスプリングの受け溝（スプリングシート溝）の切削加工については、例えば下記特許文献１に記載されているような孔ぐり工具を用いてバルブリフタ孔の内面を切削加工した後、これとは別の工具を用いてバルブスプリングの受け溝を加工している。
実開平５−８８８０５号公報 In the engine cylinder head, for example, the following patent document 1 describes the cutting process of the inner surface of the valve lifter hole into which the valve lifter is inserted and the cutting groove (spring seat groove) of the valve spring with respect to the axially forward end surface portion of the valve lifter hole. After the inner surface of the valve lifter hole is cut using a drilling tool such as that described in, a receiving groove for the valve spring is machined using a different tool.
Japanese Utility Model Publication No. 5-88805

ところで、エンジンのシリンダヘッドにおいては、エンジンの多気筒化や吸、排気ポート数の増大に伴って上記した加工部位が増大することから、これらバルブリフタ孔およびバルブスプリングの受け溝に対し、別々の工具を用いて加工を行うと、工具交換時間が必要であることから、全体として加工時間が極めて長くなり、生産性の低下を招くものとなる。   By the way, in the cylinder head of an engine, since the above-mentioned processing parts increase with the increase in the number of cylinders and the number of intake ports and the number of exhaust ports, separate tools are provided for the valve lifter holes and the valve spring receiving grooves. When machining is performed using the tool, the tool change time is required, so that the machining time becomes extremely long as a whole, leading to a decrease in productivity.

そこで、本発明は、ワークに形成してある被加工孔の内面に対する切削加工および、被加工孔の軸線方向前方に位置するワークの端面部位への溝加工を、短時間で行って生産性を向上させることを目的としている。   In view of this, the present invention performs productivity in a short time by cutting the inner surface of the hole to be processed formed in the workpiece and grooving the end surface portion of the workpiece located in front of the hole in the axial direction. The purpose is to improve.

本発明は、工具本体の先端外周部に、ワークに形成してある被加工孔の内面を切削加工する孔加工用切刃を設けるとともに、前記工具本体の先端部に、前記被加工孔の軸線方向前方に位置する前記ワークの端面部位に溝を加工する溝加工用切刃を設け、前記工具本体を回転させつつ前記被加工孔に挿入して前記孔加工用切刃により前記被加工孔を切削加工し、この切削加工に連続して前記工具本体を回転させつつ前進移動させて、前記溝加工用切刃により前記端面部位に溝を切削加工することを最も主要な特徴とする。   According to the present invention, a cutting edge for hole machining for cutting an inner surface of a hole to be processed formed in a workpiece is provided on the outer periphery of the tip of the tool body, and an axis of the hole to be processed is provided at the tip of the tool body. A groove cutting edge for machining a groove is provided at an end surface portion of the work positioned forward in the direction, and the tool body is rotated and inserted into the hole to be processed, and the hole to be processed is formed by the hole cutting edge. The main feature is that the cutting is performed and the tool main body is rotated and moved forward in succession to the cutting, and the groove is cut in the end face portion by the grooving cutting blade.

本発明によれば、工具本体を回転させつつ被加工孔に挿入して孔加工用切刃により被加工孔を切削加工し、この切削加工に連続して工具本体を回転させつつ前進移動させて、溝加工用切刃によりワークの端面部位に溝を加工するようにしたので、被加工孔の内面に対する切削加工および、ワークの端面部位への溝加工を、短時間で行って生産性を向上させることができる。   According to the present invention, the tool body is rotated and inserted into the hole to be machined, and the hole to be machined is cut by the hole machining cutting blade, and the tool body is rotated and moved forward in succession to the cutting process. Since the groove is machined on the end face part of the workpiece with the cutting edge for grooving, the cutting process on the inner surface of the hole to be machined and the grooving process on the end face part of the workpiece are performed in a short time to improve productivity. Can be made.

以下、本発明の実施の形態を図面に基づき説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態に係わる切削工具１の正面図、図２は、図１のＡ矢視図である。この切削工具１は、ほぼ円柱状の工具本体３の図１中で左側の先端外周部に、工具本体３の外周面３ａより径方向外側に突出する孔加工用切刃５を設けるとともに、工具本体３の先端部の端面３ｂにおける外周側近傍に、前方へ突出する溝加工用切刃７を設けている。これら孔加工用切刃５および溝加工用切刃７は、図２に示すように工具本体３の中心部に対して互いに反対側となる位置に設定する。   FIG. 1 is a front view of a cutting tool 1 according to an embodiment of the present invention, and FIG. 2 is a view taken in the direction of arrow A in FIG. This cutting tool 1 is provided with a hole machining cutting blade 5 projecting radially outward from the outer peripheral surface 3a of the tool body 3 on the outer peripheral portion of the left end of the substantially cylindrical tool body 3 in FIG. A grooving cutting blade 7 protruding forward is provided in the vicinity of the outer peripheral side of the end surface 3 b of the tip of the main body 3. The hole machining cutting blade 5 and the groove machining cutting blade 7 are set at positions opposite to each other with respect to the center portion of the tool body 3 as shown in FIG.

上記した切削工具１の図１中で右側の基端側には、シャンク部８を備え、このシャンク部８を図示しない工作機械の主軸に装着し、主軸とともに切削工具１を回転させて後述する切削加工を実施する。   A shank portion 8 is provided on the right base end side in FIG. 1 of the cutting tool 1 described above, and the shank portion 8 is mounted on a spindle of a machine tool (not shown), and the cutting tool 1 is rotated together with the spindle to be described later. Perform cutting.

切削工具１の孔加工用切刃５は、図３に示すように、エンジンのシリンダヘッド９における被加工孔としてのバルブリフタ孔９ａの内面を切削加工するものであり、また溝加工用切刃７は、バルブリフタ孔９ａの軸線方向前方に位置するシリンダヘッド９の端面部位９ｂに設けてあるバルブスプリングの受け溝であるスプリングシート溝９ｃを切削加工するものである。   As shown in FIG. 3, the hole cutting edge 5 of the cutting tool 1 cuts the inner surface of the valve lifter hole 9 a as a hole to be processed in the cylinder head 9 of the engine, and the groove cutting edge 7. Is for cutting a spring seat groove 9c, which is a receiving groove for a valve spring, provided in an end surface portion 9b of the cylinder head 9 located in front of the valve lifter hole 9a in the axial direction.

バルブリフタ孔９ａには、バルブリフタ１１のカップ部材１３が移動可能に収容され、カップ部材１３にはバルブ１５のステム部１５ａの基端部を連結している。ステム部１５ａは、シリンダヘッド９に固定した円筒状のバルブガイド１７内に移動可能に挿入している。   A cup member 13 of the valve lifter 11 is movably accommodated in the valve lifter hole 9 a, and a base end portion of a stem portion 15 a of the valve 15 is connected to the cup member 13. The stem portion 15 a is movably inserted into a cylindrical valve guide 17 fixed to the cylinder head 9.

ステム部１５ａの基端部近傍には、スプリングリテーナ１９がコッタ２１を介して固定されており、このスプリングリテーナ１９と前記したスプリングシート溝９ｃに嵌め込んであるスプリングシート２３との間に、バルブスプリング２５を介装する。バルブスプリング２５は、バルブリフタ１１のカップ部材１３を、カムシャフト２７に設けてあるカム２９に向けて押圧する。   A spring retainer 19 is fixed in the vicinity of the base end portion of the stem portion 15a via a cotter 21. Between the spring retainer 19 and the spring seat 23 fitted in the spring seat groove 9c, a valve is provided. A spring 25 is interposed. The valve spring 25 presses the cup member 13 of the valve lifter 11 toward the cam 29 provided on the camshaft 27.

次に、上記図３に示したようなシリンダヘッド９におけるバルブリフタ孔９ａおよびスプリングシート溝９ｃを図１に示した切削工具１によって加工する動作を、図４，図５に基づき説明する。   Next, the operation of machining the valve lifter hole 9a and the spring seat groove 9c in the cylinder head 9 as shown in FIG. 3 with the cutting tool 1 shown in FIG. 1 will be described with reference to FIGS.

図４（ａ）は、シリンダヘッド９にあらかじめ穿設されているバルブリフタ孔９ａの中心軸線と切削工具１の中心軸線とを一致させた加工待機状態である。この加工待機状態から、図４（ｂ）に示すように、図示しない主軸の回転に伴って切削工具１を回転させつつ工具本体３をバルブリフタ孔９ａに挿入し、孔加工用切刃５によってバルブリフタ孔９ａの内面をその内径が規定寸法となるよう切削加工する。   FIG. 4A shows a processing standby state in which the central axis of the valve lifter hole 9 a drilled in advance in the cylinder head 9 is aligned with the central axis of the cutting tool 1. As shown in FIG. 4 (b), the tool body 3 is inserted into the valve lifter hole 9a while rotating the cutting tool 1 with the rotation of the main shaft (not shown) from the standby state, and the valve lifter 5 is inserted into the valve lifter hole 5a. The inner surface of the hole 9a is cut so that the inner diameter becomes a specified dimension.

上記図４（ｂ）の状態から、切削工具１をその回転を継続させつつさらに前進移動させ、先端部の溝加工用切刃７を、図４（ｃ）に示すように、バルブリフタ孔９ａの軸線方向前方の端面部位９ｂに接触させて、スプリングシート溝９ｃの加工を開始する。このスプリングシート溝９ｃの加工開始時、換言すれば、溝加工用切刃７が端面部位９ｂに接触した状態では、孔加工用切刃５は、バルブリフタ孔９ａより前方に位置し、バルブリフタ孔９ａの内面に接触せず離れた状態となっている。   From the state of FIG. 4 (b), the cutting tool 1 is further moved forward while continuing its rotation, and the cutting edge 7 for grooving at the tip is moved into the valve lifter hole 9a as shown in FIG. 4 (c). The machining of the spring seat groove 9c is started by bringing it into contact with the end surface portion 9b at the front in the axial direction. At the start of processing of the spring seat groove 9c, in other words, with the groove cutting blade 7 in contact with the end surface portion 9b, the hole cutting blade 5 is positioned in front of the valve lifter hole 9a and the valve lifter hole 9a. It is in a state of being separated without touching the inner surface.

このため、バルブリフタ孔９ａの前端部と端面部位９ｂとの間隔をａ、孔加工用切刃５の先端と溝加工用切刃７の先端との間隔をｂとすると、ａ＞ｂの寸法関係にあり、溝加工用切刃７の先端と孔加工用切刃５の先端との間隔ｂを、端面部位９ｂとバルブリフタ孔９ａの端面部位９ｂ側の端部との間隔ａより狭くしていることになる。   For this reason, when the distance between the front end portion of the valve lifter hole 9a and the end surface portion 9b is a, and the distance between the tip of the hole cutting blade 5 and the tip of the groove cutting blade 7 is b, the dimensional relationship of a> b. The distance b between the tip of the grooving cutting edge 7 and the tip of the hole machining cutting edge 5 is narrower than the distance a between the end surface portion 9b and the end portion of the valve lifter hole 9a on the end surface portion 9b side. It will be.

これにより、スプリングシート溝９ｃの加工中に、孔加工用切刃５がバルブリフタ孔９ａに接触する事態を回避し、接触により急激な負荷変動が生じて軸振動特性が変化しバルブリフタ孔９に損傷を与えたり、孔加工用切刃５が損傷することを防止することができる。   This avoids a situation in which the hole cutting edge 5 contacts the valve lifter hole 9a during the processing of the spring seat groove 9c, and a sudden load fluctuation occurs due to the contact, so that the shaft vibration characteristic changes and the valve lifter hole 9 is damaged. Can be prevented, and the hole-cutting cutting edge 5 can be prevented from being damaged.

上記図４（ｃ）の状態から、切削工具１を回転させつつさらに前進させることで、図５（ａ）に示すように溝加工用切刃７によってスプリングシート溝９ｃを加工する。この際、スプリングシート溝９ｃの加工深さｃは、前記した孔加工用切刃５と溝加工用切刃７との間隔ｂよりも浅い寸法、すなわちｃ＜ｂとすることで、孔加工用切刃５の端面部位９ｂへの干渉を防止する。   From the state shown in FIG. 4C, the spring tool groove 9c is processed by the grooving cutting edge 7 as shown in FIG. At this time, the processing depth c of the spring seat groove 9c is set to a dimension shallower than the interval b between the hole cutting edge 5 and the groove cutting edge 7, that is, c <b. Interference with the end face portion 9b of the cutting blade 5 is prevented.

なお、図５（ａ）の状態では、孔加工用切刃５よりも工具本体３の端面３ｂのほうが、端面部位９ｂに近い位置にあるので、前記した加工深さｃは、溝加工用切刃７の先端と端面３ｂとの間隔よりも浅い寸法とすることが前提である。   In the state shown in FIG. 5A, the end face 3b of the tool body 3 is closer to the end face part 9b than the cutting edge 5 for hole machining. It is a premise that the dimensions are shallower than the distance between the tip of the blade 7 and the end face 3b.

スプリングシート溝９ｃの加工後は、図５（ｂ）に示すように、切削工具１を後退させ、孔加工用切刃５と溝加工用切刃７のいずれもが端面部位９ｂとバルブリフタ孔９ａの端部との間に位置した状態で、切削工具１の回転を停止させる。   After machining the spring seat groove 9c, as shown in FIG. 5 (b), the cutting tool 1 is retracted, and both the hole machining cutting blade 5 and the groove machining cutting blade 7 have the end surface portion 9b and the valve lifter hole 9a. The rotation of the cutting tool 1 is stopped in a state where the cutting tool 1 is positioned between the two ends.

そして最後に、図５（ｃ）に示すように、孔加工用切刃５がバルブリフタ孔９ａの内面から半径方向内側（図４（ｃ）では下方）に移動して離れた状態となるように、回転停止させた状態の切削工具１の中心軸線Ｘを、バルブリフタ孔９ａの中心軸線Ｙに対してオフセットさせるべく、図示しない工作機械の主軸をオフセット移動させる。その後、切削工具１をバルブリフタ孔９ａから引き抜くことで作業が完了する。   Finally, as shown in FIG. 5 (c), the hole machining cutting blade 5 is moved away from the inner surface of the valve lifter hole 9a in the radial direction (downward in FIG. 4 (c)). In order to offset the central axis X of the cutting tool 1 in the stopped state with respect to the central axis Y of the valve lifter hole 9a, the spindle of the machine tool (not shown) is offset. Thereafter, the work is completed by pulling out the cutting tool 1 from the valve lifter hole 9a.

上記したように切削工具１を、その中心軸線Ｘが、バルブリフタ孔９ａの中心軸線Ｙに対してオフセットした状態で引き抜くことで、孔加工用切刃５がバルブリフタ孔９ａの内面に干渉することを防止し、バルブリフタ孔９ａを損傷させることを防止できる。   As described above, the cutting tool 1 is pulled out in a state where the center axis X is offset with respect to the center axis Y of the valve lifter hole 9a, so that the hole cutting blade 5 interferes with the inner surface of the valve lifter hole 9a. It is possible to prevent the valve lifter hole 9a from being damaged.

なお、上記した図４，図５で示す、バルブリフタ孔９ａおよびスプリングシート溝９ｃに対する連続した加工動作は、前述したように切削工具１を図示しない工作機械の主軸に装着し、その工作機械に設けた制御部によって制御する。   4 and 5 described above, the continuous machining operation for the valve lifter hole 9a and the spring seat groove 9c is performed by mounting the cutting tool 1 on the spindle of a machine tool (not shown) as described above. Control by the control unit.

以上説明したように、本実施形態によれば、孔加工用切刃５および溝加工用切刃７を設けた切削工具１を使用してバルブリフタ孔９ａおよびスプリングシート溝９ｃを連続して加工するので、これらバルブリフタ孔９ａおよびスプリングシート溝９ｃを別々の工具を用いて加工するときのような工具交換作業が不要であり、これら２箇所の加工を短時間で行って生産性を向上させることができる。   As described above, according to the present embodiment, the valve lifter hole 9a and the spring seat groove 9c are continuously processed using the cutting tool 1 provided with the hole processing cutting blade 5 and the groove processing cutting blade 7. Therefore, it is not necessary to perform a tool changing operation as when the valve lifter hole 9a and the spring seat groove 9c are processed using separate tools, and the productivity can be improved by performing processing in these two places in a short time. it can.

本発明の一実施形態に係わる切削工具の正面図である。It is a front view of the cutting tool concerning one embodiment of the present invention. 図１のＡ矢視図である。It is A arrow directional view of FIG. 図１の切削工具によって加工するシリンダヘッドの動弁機構周辺の断面図である。It is sectional drawing of the valve mechanism periphery of the cylinder head processed with the cutting tool of FIG. 図１の切削工具による加工動作を示す動作説明図で、（ａ）は加工待機状態、（ｂ）はバルブリフタ孔を加工している状態、（ｃ）はスプリングシート溝の加工開始時の状態をそれぞれ示す。It is operation | movement explanatory drawing which shows the process operation by the cutting tool of FIG. 1, (a) is a process standby state, (b) is the state which is processing the valve lifter hole, (c) is the state at the time of the process start of a spring seat groove | channel. Each is shown. 図４に続く図１の切削工具による加工動作を示す動作説明図で、（ａ）はスプリングシート溝を加工している状態、（ｂ）はスプリングシート溝加工後に切削工具を後退させた状態、（ｃ）は切削工具をオフセット移動させた状態をそれぞれ示す。FIG. 4 is an operation explanatory view showing a processing operation by the cutting tool of FIG. 1 following FIG. 4, (a) is a state where the spring seat groove is processed, (b) is a state where the cutting tool is retracted after the spring sheet groove processing, (C) shows the state which offset-moved the cutting tool, respectively.

符号の説明Explanation of symbols

１ 切削工具
３ 工具本体
５ 孔加工用切刃
７ 溝加工用切刃
９ シリンダヘッド（ワーク）
９ａ シリンダヘッドのバルブリフタ孔（被加工孔）
９ｂ シリンダヘッドの端面部位
９ｃ スプリングシート溝（バルブスプリングの受け溝）
１１ バルブリフタ
２７ カムシャフト
ａ シリンダヘッドの端面部位とバルブリフタ孔の端面部位側の端部との間隔
ｂ 溝加工用切刃の先端と孔加工用切刃の先端との間隔 DESCRIPTION OF SYMBOLS 1 Cutting tool 3 Tool body 5 Cutting edge for drilling holes 7 Cutting edge for grooving 9 Cylinder head (workpiece)
9a Cylinder head valve lifter hole (machined hole)
9b End face part of cylinder head 9c Spring seat groove (valve spring receiving groove)
11 Valve Lifter 27 Camshaft a Distance between the end face part of the cylinder head and the end part on the end face part side of the valve lifter hole b Distance between the tip of the groove cutting blade and the tip of the hole cutting blade

Claims (10)

工具本体の先端外周部に、ワークに形成してある被加工孔の内面を切削加工する孔加工用切刃を設けるとともに、前記工具本体の先端部に、前記被加工孔の軸線方向前方に位置する前記ワークの端面部位に溝を加工する溝加工用切刃を設け、前記工具本体を回転させつつ前記被加工孔に挿入して前記孔加工用切刃により前記被加工孔を切削加工し、この切削加工に連続して前記工具本体を回転させつつ前進移動させて、前記溝加工用切刃により前記端面部位に溝を切削加工することを特徴とする切削加工方法。   Provided on the outer periphery of the tip of the tool body is a hole machining cutting edge for cutting the inner surface of the hole to be processed formed in the workpiece, and located at the tip of the tool body at the front in the axial direction of the hole to be processed. Providing a cutting edge for grooving for machining a groove on an end surface portion of the workpiece, inserting the cutting hole into the processing hole while rotating the tool body, and cutting the processing hole by the cutting hole for hole processing; A cutting method characterized in that the tool body is moved forward while being rotated continuously with the cutting, and a groove is cut in the end face portion by the grooving cutting blade. 前記溝の切削加工時には、前記孔加工用切刃が、前記被加工孔と前記端面部位との間に位置して前記被加工孔から離れた状態であることを特徴とする請求項１に記載の切削加工方法。   The cutting edge for hole machining is positioned between the hole to be machined and the end surface portion and is separated from the hole to be machined when the groove is cut. Cutting method. 前記溝の切削加工後、前記溝加工用切刃を加工した溝から引き抜いた状態で、前記孔加工用切刃が前記被加工孔の内面から半径方向内側に移動して離れた状態となるように、前記工具本体の中心軸線が前記被加工孔の中心軸線に対してオフセットさせた上で、前記工具本体を前記孔被加工から引き抜くことを特徴とする請求項１または２に記載の切削加工方法。   After the groove is cut, the hole cutting blade is moved away from the inner surface of the hole to be moved away from the inner surface of the hole in a state where the groove cutting blade is pulled out from the processed groove. 3. The cutting process according to claim 1, wherein the tool body is pulled out of the hole processing after the center axis of the tool body is offset with respect to the center axis of the hole to be processed. Method. 前記ワークはエンジンのシリンダヘッドであって、前記被加工孔はバルブリフタが移動可能に挿入されるバルブリフタ孔であり、前記溝は、前記バルブリフタをカムシャフト側に向けて押し付けるバルブスプリングの受け溝であることを特徴とする請求項１ないし３のいずれか１項に記載の切削加工方法。   The workpiece is a cylinder head of an engine, the hole to be machined is a valve lifter hole into which a valve lifter is movably inserted, and the groove is a receiving groove of a valve spring that presses the valve lifter toward the camshaft side. The cutting method according to any one of claims 1 to 3, wherein: 工具本体の先端外周部に、ワークに形成してある被加工孔の内面を切削加工する孔加工用切刃を備えるとともに、前記工具本体の先端部に、前記被加工孔の軸線方向前方に位置する前記ワークの端面部位に溝を加工する溝加工用切刃を備えた切削工具と、この切削工具を回転させつつ前記工具本体を前記被加工孔に挿入して前記孔加工用切刃により前記被加工孔を切削加工させ、この切削加工に連続して前記切削工具を回転させつつ前進移動させて、前記溝加工用切刃により前記端面部位に溝を加工させる制御部とを有することを特徴とする切削加工装置。   The tool body has a hole cutting edge for cutting the inner surface of the hole formed in the workpiece on the outer periphery of the tip of the tool body, and is positioned at the front end of the tool body in the axial direction of the hole to be processed. A cutting tool provided with a cutting edge for grooving for machining a groove in an end surface portion of the workpiece, and inserting the tool body into the hole to be processed while rotating the cutting tool, and A control unit that cuts a hole to be machined, moves the cutting tool forward while rotating the cutting tool continuously with the cutting, and processes a groove in the end face portion by the cutting edge for grooving. A cutting device. 前記切削工具は、前記溝加工用切刃の先端と前記孔加工用切刃の先端との間隔を、前記ワークの溝を加工する端面部位と前記被加工孔の前記端面部位側の端部との間隔より狭くしたことを特徴とする請求項５に記載の切削加工装置。   The cutting tool has an interval between a tip of the cutting edge for grooving and a tip of the cutting edge for hole processing, an end surface portion for processing the groove of the workpiece, and an end portion on the end surface portion side of the hole to be processed. The cutting apparatus according to claim 5, wherein the cutting apparatus is narrower than the distance between the two. 前記ワークはエンジンのシリンダヘッドであって、前記被加工孔はバルブリフタが移動可能に挿入されるバルブリフタ孔であり、前記溝は、前記バルブリフタをカムシャフト側に向けて押し付けるバルブスプリングの受け溝であることを特徴とする請求項５または６に記載の切削加工装置。   The workpiece is a cylinder head of an engine, the hole to be machined is a valve lifter hole into which a valve lifter is movably inserted, and the groove is a receiving groove of a valve spring that presses the valve lifter toward the camshaft side. The cutting apparatus according to claim 5 or 6, characterized by the above. 工具本体の先端外周部に、ワークに形成してある被加工孔の内面を切削加工する孔加工用切刃を備えるとともに、前記工具本体の先端部に、前記被加工孔の軸線方向前方に位置する前記ワークの端面部位に溝を加工する溝加工用切刃を備えたことを特徴とする切削工具。   The tool body has a hole cutting edge for cutting the inner surface of the hole formed in the workpiece on the outer periphery of the tip of the tool body, and is positioned at the front end of the tool body in the axial direction of the hole to be processed. A cutting tool comprising a grooving cutting blade for machining a groove in an end surface portion of the workpiece. 前記溝加工用切刃の先端と前記孔加工用切刃の先端との間隔を、前記ワークの溝を加工する端面部位と前記被加工孔の前記端面部位側の端部との間隔より狭くしたことを特徴とする請求項８に記載の切削工具。   The gap between the tip of the cutting edge for grooving and the tip of the cutting edge for hole machining is made narrower than the gap between the end face portion for machining the groove of the workpiece and the end portion on the end face portion side of the hole to be machined. The cutting tool according to claim 8. 前記ワークはエンジンのシリンダヘッドであって、前記被加工孔はバルブリフタが移動可能に挿入されるバルブリフタ孔であり、前記溝は、前記バルブリフタをカムシャフト側に向けて押し付けるバルブスプリングの受け溝であることを特徴とする請求項８または９に記載の切削工具。   The workpiece is a cylinder head of an engine, the hole to be machined is a valve lifter hole into which a valve lifter is movably inserted, and the groove is a receiving groove of a valve spring that presses the valve lifter toward the camshaft side. The cutting tool according to claim 8 or 9, characterized in that.
JP2006332018A 2006-12-08 2006-12-08 Cutting method, cutting apparatus and cutting tool Expired - Fee Related JP4935333B2 (en)

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WO2020204047A1 (en) * 2019-04-04 2020-10-08 株式会社牧野フライス製作所 Tap tool and tapping method
CN114226793A (en) * 2021-12-23 2022-03-25 大连明阳阀门制造有限公司 Counter boring device for valve manufacturing

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WO2020204047A1 (en) * 2019-04-04 2020-10-08 株式会社牧野フライス製作所 Tap tool and tapping method
JP2020168698A (en) * 2019-04-04 2020-10-15 株式会社牧野フライス製作所 Tap tool and tap processing method
KR20210129207A (en) * 2019-04-04 2021-10-27 가부시키가이샤 마키노 후라이스 세이사쿠쇼 Tap tool and tap machining method
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CN114226793A (en) * 2021-12-23 2022-03-25 大连明阳阀门制造有限公司 Counter boring device for valve manufacturing
CN114226793B (en) * 2021-12-23 2024-04-12 大连明阳阀门制造有限公司 Counter boring device for valve manufacturing

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