JP6872872B2 - Method of machining a conical surface using a rod-shaped tool - Google Patents

Method of machining a conical surface using a rod-shaped tool Download PDF

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JP6872872B2
JP6872872B2 JP2016182165A JP2016182165A JP6872872B2 JP 6872872 B2 JP6872872 B2 JP 6872872B2 JP 2016182165 A JP2016182165 A JP 2016182165A JP 2016182165 A JP2016182165 A JP 2016182165A JP 6872872 B2 JP6872872 B2 JP 6872872B2
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conical surface
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達男 木邑
達男 木邑
省二 青木
省二 青木
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Toyo Advanced Technologies Co Ltd
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Description

本発明は、棒状工具を用いた円錐面の加工方法に関し、特にその円錐面における削り跡の改善に関する。 The present invention relates to a method for processing a conical surface using a rod-shaped tool, and particularly to an improvement in shaving marks on the conical surface.

従来より、棒状工具として、小径のエンドミルを用いてワークを切削することが知られている。エンドミルの直径が小さくなればなるほど、先端の振動や撓みが生じやすくなる。 Conventionally, it has been known to cut a workpiece using a small-diameter end mill as a rod-shaped tool. The smaller the diameter of the end mill, the more likely it is that the tip will vibrate or bend.

技術の進歩により、エンドミルの直径をますます小さくすることができるようになり（例えば、特許文献１参照）、この極小径エンドミルによって光学部品の成形用の金型等の表面を加工することができるようになっている。例えば、図４に示すような、発光ダイオードの台部分を成形するための金型２の円錐面３を加工することが行われている。 Advances in technology have made it possible to reduce the diameter of end mills (see, for example, Patent Document 1), and this ultra-small diameter end mill can process the surface of dies and the like for molding optical parts. It has become like. For example, as shown in FIG. 4, the conical surface 3 of the mold 2 for forming the base portion of the light emitting diode is processed.

特開２００７−１８５７３６号公報Japanese Unexamined Patent Publication No. 2007-185736

しかしながら、極細のエンドミルを用いた円錐面の加工方法では、従来は、エンドミルを自転させると共に送り方向を金型中心の円周方向とし、上下に徐々に移動させながらテーパ状の円錐面の加工を行っていた（円周加工）。 However, in the method of processing a conical surface using an ultra-fine end mill, conventionally, the end mill is rotated and the feed direction is set to the circumferential direction of the center of the mold, and the tapered conical surface is processed while gradually moving up and down. I was doing (circumferential processing).

すると、エンドミルのワークに対する接触部は点当たりとなるため、こすれたような状態となることから安定した加工を行うことが難しく、テーパ状の円錐面には、金型中心を円の中心とした波紋状の切削跡が発生する。例えば、算術平均粗さＲａ＝０．６３μｍの切削跡が残り、この金型を使用してリフレクタを成型すると、光学部品としての品質面で問題が生じる可能性がある。 Then, since the contact portion of the end mill with respect to the workpiece becomes a point contact, it becomes difficult to perform stable machining because it becomes a rubbing state, and the center of the mold is set as the center of the circle on the tapered conical surface. Rippled cutting marks are generated. For example, a cutting mark having an arithmetic mean roughness Ra = 0.63 μm remains, and if a reflector is molded using this mold, there is a possibility that a problem may occur in terms of quality as an optical component.

エンドミルは、半径方向への力に対して撓みやすいが、軸方向の力に対しては強いので、テーパ状の円錐面に沿って上下に移動させながら回転するエンドミルによって切削することも考えられる。しかし、この場合でも、極細のエンドミルを用いるので、切削時の反力による撓みが生じる。 Since the end mill tends to bend with respect to a force in the radial direction but is strong against a force in the axial direction, it is conceivable to cut with an end mill that rotates while moving up and down along a tapered conical surface. However, even in this case, since an ultra-fine end mill is used, bending occurs due to a reaction force during cutting.

具体的には、図５に示すように、エンドミル１の回転力Ｆ１と、工具の送り力Ｆ２との合力Ｆ３を加えながら、荒加工などの前工程による上下に延びる突条５を含む削り跡を削ってその削り跡をなくす仕上げ加工が行われる。この削り跡を削るときの反力Ｆ４（図５に破線で示す）によってエンドミル１が回転方向と反対側に大きく撓み、削り跡を綺麗に削り取れないという問題がある。この問題は、先端に電着ダイヤなどの砥石が設けられた小径の棒状工具でも同じである。 Specifically, as shown in FIG. 5, while applying the resultant force F3 between the rotational force F1 of the end mill 1 and the feed force F2 of the tool, a shaving mark including a ridge 5 extending vertically due to a previous process such as roughing is applied. A finishing process is performed to eliminate the shaving marks. There is a problem that the end mill 1 is greatly bent in the direction opposite to the rotation direction due to the reaction force F4 (shown by a broken line in FIG. 5) when the shaving marks are cut, and the shaving marks cannot be cut cleanly. This problem is the same for small-diameter rod-shaped tools provided with a grindstone such as an electrodeposited diamond at the tip.

本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、極小径の棒状工具によって円錐面を削る場合であっても、表面に削り跡をできるだけ残さないようにすることにある。 The present invention has been made in view of this point, and an object of the present invention is to make as little shaving marks as possible on the surface even when shaving a conical surface with a rod-shaped tool having an extremely small diameter. It is in.

上記の目的を達成するために、この発明では、円錐面を上下に送りながら削る場合に、本来の送り方向よりも若干シフトした位置で棒状工具を上下に送るようにした。 In order to achieve the above object, in the present invention, when shaving the conical surface while feeding it up and down, the rod-shaped tool is fed up and down at a position slightly shifted from the original feeding direction.

具体的には、第１の発明では、棒状工具を用いた円錐面の加工方法を前提とし、
上記加工方法は、
回転する上記棒状工具をワークの円錐面の円周方向に順次所定の間隔を空けて移動しながら高さ方向に送って荒加工を繰り返す荒加工工程と、
上記荒加工工程によって上記円錐面に残る高さ方向に延びる溝状の切削跡に対して該溝状の切削跡の幅方向中心に対して回転する上記棒状工具を円周方向に若干シフトした送り方向に沿って送りながら切削を行う仕上げ加工を、円周方向に移動して位置を変更しながら順次繰り返す仕上げ加工工程とを含む。 Specifically, in the first invention, a method of machining a conical surface using a rod-shaped tool is premised.
The above processing method is
A roughing process in which the rotating rod-shaped tool is sequentially moved in the circumferential direction of the conical surface of the work at predetermined intervals and sent in the height direction to repeat roughing.
The rod-shaped tool that rotates with respect to the groove-shaped cutting mark extending in the height direction remaining on the conical surface by the roughing step with respect to the width direction center of the groove-shaped cutting mark is slightly shifted in the circumferential direction. It includes a finishing process in which cutting is performed while feeding along a direction, and a finishing process in which the cutting is sequentially repeated while moving in the circumferential direction and changing the position.

上記の構成によると、エンドミルや先端に電着ダイヤが設けられた棒状工具を用いて円錐面を切削又は研削する場合に高さ方向に送りながら荒加工すると高さ方向に溝状の切削跡が残るが、仕上げ工程でその切削跡が低減される。その際に、棒状工具を切削跡の幅方向中心から敢えてシフトさせることで、棒状工具に加わる力を調整し、通常よりも棒状工具が撓まないようにすることができる。なお、棒状工具は、エンドミルなどの切削工具だけでなく、先端に砥石が設けられた研削工具を含む。 According to the above configuration, when cutting or grinding a conical surface using an end mill or a rod-shaped tool provided with an electrodeposited diamond at the tip, rough cutting while feeding in the height direction produces groove-shaped cutting marks in the height direction. Although it remains, the cutting marks are reduced in the finishing process. At that time, by intentionally shifting the rod-shaped tool from the center of the cutting mark in the width direction, the force applied to the rod-shaped tool can be adjusted so that the rod-shaped tool does not bend more than usual. The rod-shaped tool includes not only a cutting tool such as an end mill but also a grinding tool provided with a grindstone at the tip.

第２の発明では、第１の発明において、
上記仕上げ加工工程において、上記溝状の切削跡における上記棒状工具の回転方向側の取り代が減るように回転方向と反対側に上記棒状工具をシフトする。 In the second invention, in the first invention,
In the finishing process, the rod-shaped tool is shifted to the side opposite to the rotation direction so that the allowance on the rotation direction side of the rod-shaped tool in the groove-shaped cutting mark is reduced.

上記の構成によると、回転方向側の取り代が減っているので、切削跡の幅方向中心で切削する場合に比べ、棒状工具に加わる回転力と送り力との合力に対して生じる反力も小さくなる。その結果として棒状工具のたわみ量が低減される。 According to the above configuration, the allowance on the rotation direction side is reduced, so the reaction force generated with respect to the resultant force of the rotational force and the feed force applied to the rod-shaped tool is smaller than when cutting at the center of the cutting mark in the width direction. Become. As a result, the amount of deflection of the rod-shaped tool is reduced.

第３の発明では、第１又は第２の発明において、
上記荒加工工程において、次の荒加工位置に移動する前に、上記仕上げ加工工程においてシフトした位置で削り始めとなる上記円錐面の上端のみ削っておく。 In the third invention, in the first or second invention,
In the roughing process, only the upper end of the conical surface, which starts to be cut at the shifted position in the finishing process, is cut before moving to the next roughing position.

上記の構成によると、仕上げ加工における削り始めは、切削位置のシフトによる撓み防止効果が得られないので、荒加工において予め削り始めを削っておくことで、棒状工具の削り始めにおける、棒状工具の形状ガイド機能を持たせておくことができ、削り始めの棒状工具の撓みも防止することができる。 According to the above configuration, the effect of preventing bending due to the shift of the cutting position cannot be obtained at the start of cutting in the finishing process. Therefore, by cutting the start of cutting in advance in roughing, the rod-shaped tool can be used at the beginning of cutting. The shape guide function can be provided, and the bending of the rod-shaped tool at the start of cutting can be prevented.

第４の発明では、第１から第３のいずれか１つの発明において、
上記仕上げ加工工程におけるシフト量を被切削抵抗と切込量と送り量との積から算出する。 In the fourth invention, in any one of the first to third inventions,
The shift amount in the finishing process is calculated from the product of the resistance to be cut, the depth of cut, and the feed amount.

上記の構成によると、棒状工具の剛性から棒状工具の撓みを推定してシフト量が設定される。 According to the above configuration, the shift amount is set by estimating the deflection of the rod-shaped tool from the rigidity of the rod-shaped tool.

以上説明したように、本発明によれば、荒加工による切削跡の幅方向中心に対して若干シフトした位置で回転する棒状工具を高さ方向に送って切削を行うことにより、極小径の棒状工具によって円錐面を削る場合であっても、表面に削り跡をできるだけ残さないようにすることができる。 As described above, according to the present invention, a rod-shaped tool that rotates at a position slightly shifted with respect to the center of the width direction of the cutting mark due to rough machining is sent in the height direction to perform cutting, thereby forming a rod shape having an extremely small diameter. Even when cutting a conical surface with a tool, it is possible to leave as few shaving marks on the surface as possible.

エンドミルを用いた円錐面の加工方法における仕上げ加工を示す斜視図である。It is a perspective view which shows the finishing process in the process of processing a conical surface using an end mill. エンドミルを用いた円錐面の加工方法における仕上げ加工を示す平面図である。It is a top view which shows the finishing process in the process of processing a conical surface using an end mill. エンドミルを用いた円錐面の加工方法における仕上げ加工を示す正面図である。It is a front view which shows the finishing process in the process of processing a conical surface using an end mill. 金型を示す斜視図である。It is a perspective view which shows the mold. エンドミルに加わる負荷を示す概略図である。It is the schematic which shows the load applied to the end mill.

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

図１〜図４は、本発明の実施形態の棒状工具としてのエンドミル１を用いた円錐面２の加工の様子を示す。エンドミル１としては、特許文献１のような直径２ｍｍ程度の極小径のものについて説明するが、それよりも外径の小さいものや大きいものであってもよい。ワークとして例えば、発光ダイオードの台を成形するための金型２（例えば図４に示す）を例に説明する。 1 to 4 show a state of processing the conical surface 2 using the end mill 1 as a rod-shaped tool according to the embodiment of the present invention. As the end mill 1, the one having an extremely small diameter of about 2 mm as in Patent Document 1 will be described, but the end mill 1 may have an outer diameter smaller or larger than that. As a work, for example, a mold 2 (for example, shown in FIG. 4) for forming a base of a light emitting diode will be described as an example.

具体的には、本実施形態のエンドミル１を用いた円錐面２の加工方法では、まず、荒加工工程において、回転するエンドミル１を金型２の円錐面３の円周方向に順次所定の間隔を空けて移動して位置を変更しながら高さ方向（送り方向を矢印Ｇで示す）に送って荒加工を繰り返す。この円周方向の間隔は、例えば、円錐面３の全周３６０°を等分に割り切るように設定する。例えば、１周目に４０°ずつに９分割して切削し、次は、そのちょうど半分の２０°の位置で等分割し、徐々に間隔を狭めた位置にずらしながら高さ方向に送って切削を行う。図２に示すように、エンドミル１で円錐面３を切削すると、切削後の円錐面３には、溝状の切削跡４が形成され、溝状の切削跡４の両側に突条５が形成される。円周方向にずらしながら高さ方向にエンドミル１を送っていくことで、分割数に応じた縦線の突条５が生じる。 Specifically, in the method of processing the conical surface 2 using the end mill 1 of the present embodiment, first, in the roughing process, the rotating end mill 1 is sequentially spaced in the circumferential direction of the conical surface 3 of the mold 2. The roughing process is repeated by feeding in the height direction (the feed direction is indicated by the arrow G) while changing the position by moving with a gap. The interval in the circumferential direction is set so as to divide the entire circumference 360 ° of the conical surface 3 into equal parts, for example. For example, on the first lap, it is cut by dividing it into 9 parts of 40 ° each, then it is divided into equal parts at the position of 20 °, which is exactly half of that, and it is sent in the height direction while gradually shifting to a narrower position for cutting. I do. As shown in FIG. 2, when the conical surface 3 is cut by the end mill 1, a groove-shaped cutting mark 4 is formed on the conical surface 3 after cutting, and ridges 5 are formed on both sides of the groove-shaped cutting mark 4. Will be done. By feeding the end mill 1 in the height direction while shifting in the circumferential direction, the ridges 5 of vertical lines corresponding to the number of divisions are generated.

この荒加工工程において、図２に破線で示すように、次の荒加工位置に移動する前に、後述する仕上げ加工工程においてシフトした位置で削り始めとなる円錐面３の上端のみを削っておいてもよい。すなわち、仕上げ加工における削り始めは、シフトによる撓み防止効果が得られないので、荒加工において予め削り始めを削っておくことで、棒状工具の削り始めにおける、棒状工具の形状ガイド機能を持たせておくことができ、削り始めのエンドミル１の撓みも防止することができる。 In this roughing process, as shown by the broken line in FIG. 2, before moving to the next roughing position, only the upper end of the conical surface 3 which starts to be cut at the shifted position in the finishing processing step described later is cut. You may. That is, since the bending start prevention effect due to the shift cannot be obtained at the start of shaving in the finishing process, the shape guide function of the rod-shaped tool at the start of shaving of the rod-shaped tool is provided by shaving the start of shaving in advance in the roughing. It can be left in place and the bending of the end mill 1 at the start of cutting can be prevented.

次いで、仕上げ加工工程において、荒加工工程によって円錐面３に残る高さ方向に延びる溝状の切削跡４に対し、溝状の切削跡４の幅方向中心に対して回転するエンドミル１を円周方向に若干シフトした送り方向に沿って送りながら切削を行う。この仕上げ加工を、荒工程と同様に円周方向に移動して位置を変更しながら順次繰り返す。この仕上げ加工工程において、エンドミル１の回転方向側の取り代が減るように回転方向と反対側にエンドミル１をシフトする。図面では、切削跡４を誇張して書いているが、実際には、取り代は２μｍ程度であり、突条５もそれほど大きく突出していない。このシフト量Ｓは、例えば、被切削抵抗と切込量と送り量との積から算出する。すなわち、エンドミル１の剛性からエンドミル１の撓みを推定し、シフト量Ｓ（実際には角度の値）として設定される。これは実際に想定したシフト量Ｓで効果を確認して経験的に求めてもよい。 Next, in the finishing process, the end mill 1 that rotates with respect to the center of the groove-shaped cutting mark 4 in the width direction is circled with respect to the groove-shaped cutting mark 4 extending in the height direction remaining on the conical surface 3 due to the roughing process. Cutting is performed while feeding along the feeding direction slightly shifted in the direction. This finishing process is sequentially repeated while moving in the circumferential direction and changing the position in the same manner as in the roughing process. In this finishing process, the end mill 1 is shifted to the side opposite to the rotation direction so that the allowance on the rotation direction side of the end mill 1 is reduced. In the drawing, the cutting mark 4 is exaggerated, but in reality, the cutting allowance is about 2 μm, and the ridge 5 does not protrude so much. This shift amount S is calculated from, for example, the product of the resistance to be cut, the depth of cut, and the feed amount. That is, the deflection of the end mill 1 is estimated from the rigidity of the end mill 1 and set as the shift amount S (actually, the value of the angle). This may be obtained empirically by confirming the effect with the actually assumed shift amount S.

このように、円錐面３を研削する場合に高さ方向に送りながら荒加工すると高さ方向に溝状の切削跡４が残るが、仕上げ工程でその切削跡４が低減される。その際に、エンドミル１を切削跡４の幅方向中心から敢えてシフト量Ｓだけ位置変更しているので、通常よりもエンドミル１が撓まないようにすることができる。すなわち、回転方向側の取り代が減っており、逆に回転方向と反対側の取り代が増えているので、エンドミル１に加わる回転力Ｆ１と送り力Ｆ２との合力Ｆ３に対して生じる反力Ｆ４を受けるが、その力は、回転方向と反対側の取り代を削るときの反力によって打ち消されて小さくなる。言い換えれば、回転方向側の取り代を減らすことで、その負荷を減少させ、回転方向反対側の取り代を増やすことで、その負荷によるバックアップ効果が得られる。このため、エンドミル１のたわみ量が格段に低減される。 As described above, when the conical surface 3 is ground, if roughing is performed while feeding the conical surface 3 in the height direction, a groove-shaped cutting mark 4 remains in the height direction, but the cutting mark 4 is reduced in the finishing process. At that time, since the position of the end mill 1 is intentionally changed by the shift amount S from the center of the cutting mark 4 in the width direction, the end mill 1 can be prevented from bending more than usual. That is, since the allowance on the rotation direction side is decreasing and the allowance on the opposite side to the rotation direction is increasing, the reaction force generated with respect to the resultant force F3 of the rotational force F1 and the feed force F2 applied to the end mill 1 is increased. It receives F4, but its force is canceled by the reaction force when cutting the allowance on the opposite side of the rotation direction and becomes smaller. In other words, by reducing the allowance on the rotation direction side, the load is reduced, and by increasing the takeover allowance on the opposite side in the rotation direction, a backup effect due to the load can be obtained. Therefore, the amount of deflection of the end mill 1 is significantly reduced.

実際にこのシフト方式で切削を行った場合の円錐面３の表面荒さを計測したところ、従来の円周方向に公転させながら徐々に高さ方向に研削していく方法（円周加工方法）でＲａ＝０．６３μｍであったのが、Ｒａ＝０．０１μｍとなり、極めて大きな効果が得られることを確認できた。 When the surface roughness of the conical surface 3 when actually cutting with this shift method was measured, it was found that the conventional method of revolving in the circumferential direction and gradually grinding in the height direction (circumferential processing method) was used. It was confirmed that Ra = 0.63 μm was changed to Ra = 0.01 μm, and an extremely large effect was obtained.

したがって、本実施形態に係るエンドミル１を用いた円錐面３の加工方法によると、極小径のエンドミル１によって円錐面３を削る場合であっても、表面に削り跡をできるだけ残さないようにすることができる。 Therefore, according to the method for processing the conical surface 3 using the end mill 1 according to the present embodiment, even when the conical surface 3 is scraped by the end mill 1 having an extremely small diameter, the scraping marks should be kept as little as possible on the surface. Can be done.

（その他の実施形態）
本発明は、上記実施形態について、以下のような構成としてもよい。 (Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

すなわち、上記実施形態では、ワークとして、発光ダイオードの台を成形するための金型２を例に説明したが、このような金型２でなくても、少なくとも円錐面３の加工面を有するものであれば特に限定されない。 That is, in the above embodiment, as the work, the mold 2 for forming the base of the light emitting diode has been described as an example, but even if the mold 2 is not such a mold 2, it has at least a processed surface of a conical surface 3. If so, it is not particularly limited.

なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物や用途の範囲を制限することを意図するものではない。 It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

すなわち、上記実施形態では、棒状工具は、エンドミルとしているが、例えば、電着ダイヤが先端に設けられた直径０．０５ｍｍほどの研削工具でもよい。この研削工具を用いて研削する場合でも同様の作用効果が得られる。 That is, in the above embodiment, the rod-shaped tool is an end mill, but for example, a grinding tool having an electrodeposition diamond at the tip and having a diameter of about 0.05 mm may be used. The same effect can be obtained even when grinding using this grinding tool.

１ エンドミル（棒状工具）
２ ＬＥＤ用金型（ワーク）
３ 円錐面
４ 溝状の切削跡
５ 突条 1 End mill (rod-shaped tool)
2 LED mold (work)
3 Conical surface
4 Groove-shaped cutting marks
5 ridges

Claims (4)

棒状工具を軸方向に押し付けるようにしながらワークのテーパ状の円錐面を加工する、棒状工具を用いた円錐面の加工方法において、
回転する上記棒状工具をワークの円錐面の円周方向に順次間隔を空けて位置を変更しながら高さ方向に送って荒加工を繰り返す荒加工工程と、
上記荒加工工程によって上記円錐面に残る高さ方向に延びる溝状の切削跡に対して該溝状の切削跡の幅方向中心に対し、上記棒状工具の軸方向中心を円周方向に対して位置変更し、回転方向側の取り代を減らし、回転方向と反対側の取り代を増やし、該棒状工具に加わる回転力と送り力の合力に対して生じる反力を打ち消して該棒状工具の撓みを抑制しながら回転する上記棒状工具を高さ方向に送って切削を行う仕上げ加工を、円周方向に移動して位置を変更しながら順次繰り返す仕上げ加工工程とを含む
ことを特徴とする棒状工具を用いた円錐面の加工方法。 In the method of machining a conical surface using a rod-shaped tool, which processes the tapered conical surface of the work while pressing the rod-shaped tool in the axial direction.
A roughing process in which the above-mentioned rotating rod-shaped tool is sequentially sent in the height direction while changing the position at intervals in the circumferential direction of the conical surface of the work to repeat roughing.
With respect to the groove-shaped cutting mark extending in the height direction remaining on the conical surface by the roughing step, the axial center of the rod-shaped tool is relative to the circumferential direction with respect to the width direction center of the groove-shaped cutting mark. The position is changed, the allowance on the rotation direction side is reduced, the allowance on the side opposite to the rotation direction is increased, and the reaction force generated with respect to the resultant force of the rotational force and the feed force applied to the rod-shaped tool is canceled and the rod-shaped tool is bent. A rod-shaped tool characterized in that the finishing process of sending the above-mentioned rod-shaped tool that rotates while suppressing the above-mentioned is sent in the height direction to perform cutting is sequentially repeated while moving in the circumferential direction and changing the position. Method of processing a conical surface using. 棒状工具を軸方向に押し付けるようにしながらワークのテーパ状の円錐面を加工する、棒状工具を用いた円錐面の加工方法において、
回転する上記棒状工具をワークの円錐面の円周方向に順次間隔を空けて位置を変更しながら高さ方向に送って荒加工を繰り返す荒加工工程と、
上記荒加工工程によって上記円錐面に残る高さ方向に延びる溝状の切削跡に対して該溝状の切削跡の幅方向中心に対して若干シフトした位置で回転する上記棒状工具を高さ方向に送って切削を行う仕上げ加工を、円周方向に移動して位置を変更しながら順次繰り返す仕上げ加工工程とを含み、
上記仕上げ加工工程において、上記溝状の切削跡における上記棒状工具の回転方向側の取り代が減るように、かつ上記棒状工具の撓み具合から該棒状工具が撓む方向とは逆に力がかかるように、該溝状の切削跡の幅方向中心から回転方向と反対側に上記棒状工具をシフトするように構成されており、
上記棒状工具のシフト量は、該棒状工具の剛性から該棒状工具の撓みを推定することにより決定される
ことを特徴とする棒状工具を用いた円錐面の加工方法。 In the method of machining a conical surface using a rod-shaped tool, which processes the tapered conical surface of the work while pressing the rod-shaped tool in the axial direction.
A roughing process in which the above-mentioned rotating rod-shaped tool is sequentially sent in the height direction while changing the position at intervals in the circumferential direction of the conical surface of the work to repeat roughing.
The rod-shaped tool that rotates at a position slightly shifted with respect to the center of the groove-shaped cutting mark in the width direction with respect to the groove-shaped cutting mark extending in the height direction remaining on the conical surface by the roughing step in the height direction. Including a finishing process in which the finishing process of sending to and cutting is repeated in sequence while moving in the circumferential direction and changing the position.
In the finishing process, a force is applied so as to reduce the allowance on the rotation direction side of the rod-shaped tool in the groove-shaped cutting mark, and the force is applied in the direction opposite to the bending direction of the rod-shaped tool due to the degree of bending of the rod-shaped tool. As described above, the rod-shaped tool is configured to shift from the center of the groove-shaped cutting mark in the width direction to the side opposite to the rotation direction.
A method for machining a conical surface using a rod-shaped tool, wherein the shift amount of the rod-shaped tool is determined by estimating the deflection of the rod-shaped tool from the rigidity of the rod-shaped tool. 棒状工具を用いた円錐面の加工方法において、
回転する上記棒状工具をワークの円錐面の円周方向に順次間隔を空けて位置を変更しながら高さ方向に送って荒加工を繰り返す荒加工工程と、
上記荒加工工程によって上記円錐面に残る高さ方向に延びる溝状の切削跡に対して該溝状の切削跡の幅方向中心に対して若干シフトした位置で回転する上記棒状工具を高さ方向に送って切削を行う仕上げ加工を、円周方向に移動して位置を変更しながら順次繰り返す仕上げ加工工程とを含み、
上記荒加工工程において、次の荒加工位置に移動する前に、上記仕上げ加工工程においてシフトした位置で削り始めとなる上記円錐面の上端のみ削っておく
ことを特徴とする棒状工具を用いた円錐面の加工方法。 In the method of machining a conical surface using a rod-shaped tool,
A roughing process in which the above-mentioned rotating rod-shaped tool is sequentially sent in the height direction while changing the position at intervals in the circumferential direction of the conical surface of the work to repeat roughing.
The rod-shaped tool that rotates at a position slightly shifted with respect to the center of the groove-shaped cutting mark in the width direction with respect to the groove-shaped cutting mark extending in the height direction remaining on the conical surface by the roughing step in the height direction. Including a finishing process in which the finishing process of sending to and cutting is repeated in sequence while moving in the circumferential direction and changing the position.
In the roughing process, a cone using a rod-shaped tool is characterized in that only the upper end of the conical surface, which starts to be cut at the shifted position in the finishing process, is cut before moving to the next roughing position. Surface processing method. 請求項１から３のいずれか１つに記載の棒状工具を用いた円錐面の加工方法において、
上記仕上げ加工工程におけるシフト量を被切削抵抗と切込量と送り量との積から算出する
ことを特徴とする棒状工具を用いた円錐面の加工方法。 In the method for processing a conical surface using the rod-shaped tool according to any one of claims 1 to 3.
Method for processing a conical surface with a rod-shaped tool, characterized in that the output product or we calculated the amount of feed and the cutting resistance and the depth of cut a shift amount in the finishing process.
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