JP2005329509A - Cutting tool - Google Patents
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- JP2005329509A JP2005329509A JP2004150443A JP2004150443A JP2005329509A JP 2005329509 A JP2005329509 A JP 2005329509A JP 2004150443 A JP2004150443 A JP 2004150443A JP 2004150443 A JP2004150443 A JP 2004150443A JP 2005329509 A JP2005329509 A JP 2005329509A
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Abstract
Description
本発明は、切削工具に関し、特に、被削材を旋削加工及び転削加工するための切削工具に関する。 The present invention relates to a cutting tool, and more particularly to a cutting tool for turning and turning a work material.
従来、工具びびりを抑制する切削工具として、図９に示すような中ぐりバイトがあった。図９はこの中ぐりバイトの斜視図である。この中ぐりバイト（１）の工具本体（２）の先端側には、切れ刃に対して周方向反対側の外周面に凹溝（１５）が形成されている。ヘッド部（３）を凹溝（１５）によって軽量化し、切削抵抗による振動数との乖離を大きくして共振を抑制しようとするものである。（例えば、特許文献１参照） Conventionally, there has been a boring tool as shown in FIG. 9 as a cutting tool for suppressing tool chatter. FIG. 9 is a perspective view of the boring tool. On the distal end side of the tool body (2) of the boring tool (1), a concave groove (15) is formed on the outer circumferential surface opposite to the cutting edge in the circumferential direction. The head portion (3) is reduced in weight by the concave groove (15), and the resonance is suppressed by increasing the deviation from the frequency due to the cutting resistance. (For example, see Patent Document 1)
しかしながら、上述した従来の中ぐりバイト（１）では、凹溝（１５）を形成したヘッド部（３）の静剛性が低下し切削抵抗による工具本体（２）の撓みが増大してしまうおそれがあった。また静剛性を高めるために工具本体（２）を縦弾性係数の高い超硬合金等で構成した場合には、工具本体（２）の質量が大きいため上記の共振を抑制する効果が得られないおそれがある。 However, in the conventional boring tool (1) described above, the static rigidity of the head portion (3) in which the concave groove (15) is formed may be reduced, and the deflection of the tool body (2) due to cutting resistance may be increased. there were. Further, when the tool body (2) is made of a cemented carbide or the like having a high longitudinal elastic modulus in order to increase the static rigidity, the effect of suppressing the resonance cannot be obtained because the mass of the tool body (2) is large. There is a fear.
本発明は、上記の事情に鑑みてなされたものであって、その目的は、切削抵抗の振動による工具本体のびびり振動を抑制した切削工具を提供することにある。 The present invention has been made in view of the above circumstances, and an object thereof is to provide a cutting tool in which chatter vibration of a tool body due to vibration of cutting resistance is suppressed.
上記の課題を解決するため、本発明は、略多角形棒状又は略丸棒状をなす工具本体の先端面及び／又は外周面から突出する切れ刃を備えた切削工具において、前記工具本体は、前記工具本体の最も先端部に配設される略多角柱状又は略円柱状をなす頭部と、前記頭部から後端側に向かって前記頭部と略同一軸線上に延設される係合軸部と、前記係合軸部が挿通される挿通穴を中央部に有する略環状をなす複数の構成部材と、前記係合軸部に係合する係合部材又はシャンク部材とからなり、前記係合軸部に順次嵌挿される複数の構成部材は、前記頭部のほぼ軸線延長線上後端側に順次配列され、さらに、複数の前記構成部材のうち最も後端側に配設される構成部材の後端側に配設されるとともに前記係合軸部に係合する前記係合部材又は前記シャンク部材によって、前記頭部側に向かって押圧されて連結されていることを特徴とする切削工具である。このとき、前記切削工具の工具本体において、前記係合軸部は前記頭部に一体又は別個に設けられてもよい。また、前記頭部及び／又は前記構成部材には、凹欠部、貫通穴、止まり穴の少なくともいずれか１つが設けられるのが好ましい。 In order to solve the above-described problems, the present invention provides a cutting tool provided with a cutting edge protruding from the tip surface and / or outer peripheral surface of a tool body having a substantially polygonal bar shape or a substantially round bar shape. A head having a substantially polygonal column shape or a substantially columnar shape disposed at the most distal end of the tool body, and an engagement shaft extending on the same axis as the head from the head toward the rear end. And a plurality of substantially annular components having an insertion hole through which the engagement shaft portion is inserted in the center, and an engagement member or a shank member that engages with the engagement shaft portion. The plurality of constituent members that are sequentially inserted into the shaft portion are sequentially arranged on the rear end side substantially on the axial extension line of the head, and are further disposed on the rearmost end side among the plurality of constituent members. The engaging member or the shim that is disposed on the rear end side and engages with the engaging shaft portion. The link member is a cutting tool, characterized in that it is connected by being pressed toward the head side. At this time, in the tool main body of the cutting tool, the engagement shaft portion may be provided integrally or separately on the head. Moreover, it is preferable that at least any one of a recessed part, a through-hole, and a blind hole is provided in the said head and / or the said structural member.
工具本体の長手方向に隣接する構成部材は、相互に径方向及び円周方向に摺動可能であり、且つ長手方向に相互に押接されているので、該工具本体の径方向又は円周方向の少なくともいずれか一方の振動が生じたとき、上記の隣接する構成部材の摺動界面に生じる摩擦力により上記の振動を減衰することができる。したがって、上記の振動による工具本体のびびり振動が大幅に抑制される。 The components adjacent to the longitudinal direction of the tool body are slidable in the radial direction and the circumferential direction, and are pressed against each other in the longitudinal direction, so the radial direction or circumferential direction of the tool body When at least one of the vibrations occurs, the vibration can be attenuated by the frictional force generated at the sliding interface between the adjacent constituent members. Therefore, chatter vibration of the tool body due to the above vibration is greatly suppressed.
また、前記頭部及び／又は構成部材において、凹欠部、貫通穴、止まり穴の少なくともいずれか１つが設けられた場合には、該工具本体が軽量化することにより固有振動数が高められ切削抵抗による振動数との乖離が大きくなることから、工具本体の共振が抑制される。 In the case where at least one of a recessed portion, a through hole, and a blind hole is provided in the head and / or the structural member, the natural frequency is increased by reducing the weight of the tool body, and cutting is performed. Since the deviation from the frequency due to the resistance is increased, the resonance of the tool body is suppressed.
次に、本発明を適用した第１の実施の形態について図１〜図３を参照しながら説明する。図１は第１の実施の形態に係る中ぐりバイトを示す図であり、（ａ）は平面図、（ｂ）は正面図である。図２は工具本体の最も先端側に位置する頭部の平面図であり、図３は工具本体のシャンク部を構成する構成部材を示す図であり、（ａ）、（ｂ）、（ｃ）は正面図であり、（ｄ）は（ｃ）におけるＡ−Ａ線断面図である。図１及び図２に示すように、この中ぐりバイト（１）の工具本体（２）は、最も先端側に位置する略円柱状の頭部（４）と、前記頭部（４）から後端側に向かって延びる係合軸部（５）と、前記係合軸部（５）と係合する係合部材（１２）と、前記頭部（４）の後端側に長手方向に沿って連結される複数の環状の構成部材（６）とからなる。前記頭部（４）は合金鋼等からなり、先端外周部には外周面（４ａ）に切りくず排出溝（７）を凹設され、この切りくず排出溝（７）の切削方向（Ｓ）を向く壁面には切れ刃（１３）を備えたチップ（１１）を装着するためのチップ座（１０）が凹設されている。そして、図２に示されるように、前記頭部（４）の後端側には、前記構成部材（６）を嵌挿するための係合軸部（５）が長手方向後端側に向かって前記頭部（４）から一体に延設されている。一方、前記構成部材（６）は、前記頭部（４）と同様に合金鋼等からなり、図３の（ａ）に示すように略円環状をなし、中央部には前記係合軸部（５）の軸部直径よりも若干大きい直径の挿通穴（６ａ）が設けられている。そして、図１に示すように、７個の構成部材（６Ａ、６Ｂ、…、６Ｇ）は、それぞれの挿通穴（６ａ）を前記係合軸部（５）に嵌挿され、該工具本体（２）の長手方向に沿って並列され、さらに、最も後端側に位置する構成部材（６Ｇ）の後端側を向く端面を、前記係合軸部（５）に係合する係合部材（１２）によって前記頭部（４）側に向かって押圧されることにより、それぞれの構成部材（６Ａ、６Ｂ、…、６Ｇ）の長手方向を向く両端面を互いに押接される。そして、これら７つの構成部材（６Ａ、６Ｂ、…、６Ｇ）が該工具本体（２）のシャンク部を構成する。ここで、前記係合軸部（５）と前記係合部材（１２）との係合手段としては、例えばねじ等の係合手段が選ばれる。 Next, a first embodiment to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a view showing a boring tool according to the first embodiment, in which (a) is a plan view and (b) is a front view. FIG. 2 is a plan view of the head located on the most distal end side of the tool body, and FIG. 3 is a diagram showing constituent members constituting the shank portion of the tool body, (a), (b), (c) Is a front view, and (d) is a cross-sectional view along line AA in (c). As shown in FIGS. 1 and 2, the tool body (2) of the boring tool (1) includes a substantially cylindrical head (4) located on the most distal side and a rear side from the head (4). An engagement shaft portion (5) extending toward the end side, an engagement member (12) engaged with the engagement shaft portion (5), and a rear end side of the head portion (4) along the longitudinal direction And a plurality of annular components (6) connected together. The head (4) is made of alloy steel or the like, and a chip discharge groove (7) is formed in the outer peripheral surface (4a) at the outer peripheral portion of the tip, and the cutting direction (S) of the chip discharge groove (7). A tip seat (10) for mounting a tip (11) provided with a cutting edge (13) is recessed in the wall surface facing. As shown in FIG. 2, an engagement shaft portion (5) for inserting the component member (6) is directed to the rear end side in the longitudinal direction on the rear end side of the head portion (4). And extending integrally from the head (4). On the other hand, the component member (6) is made of alloy steel or the like, similar to the head (4), and has a substantially annular shape as shown in FIG. An insertion hole (6a) having a diameter slightly larger than the shaft diameter of (5) is provided. Then, as shown in FIG. 1, seven component members (6A, 6B,..., 6G) are inserted into the engagement shaft portions (5) through the respective insertion holes (6a), and the tool body ( 2) The engaging member (6) which is arranged in parallel along the longitudinal direction and further faces the rear end side of the constituent member (6G) located closest to the rear end side is engaged with the engaging shaft portion (5). 12) by pressing toward the head (4) side, the two end surfaces facing the longitudinal direction of the respective constituent members (6A, 6B,..., 6G) are pressed against each other. These seven constituent members (6A, 6B,..., 6G) constitute a shank portion of the tool body (2). Here, as the engagement means between the engagement shaft portion (5) and the engagement member (12), for example, an engagement means such as a screw is selected.
頭部（４）に設けられたチップ座（１０）に装着されるチップ（１１）は、例えば超硬合金、被覆超硬合金、サーメット、セラミック、ダイヤモンド、ｃＢＮ等の硬質材料からなり、図１に示すように、略菱形平板状をなす。その中央部には厚さ方向に貫通する取付け穴（１１ａ）が設けられており、この取付け穴（１１ａ）に挿通されたチップ固定ねじ（９）がチップ座（１０）の底面に設けられた雌ねじ（図示しない）に螺着することにより、該チップ（１１）は前記チップ座（１０）に固定されている。そして、前記チップ（１１）の上面辺稜部に形成された切れ刃（１３）の該中ぐりバイト（１）の外周側を向く外周切れ刃（１３ａ）と、先端側を向く先端切れ刃（１３ｂ）とがそれぞれ頭部（４）の外周面（４ａ）と先端面（４ｂ）とから突出して配設されている。 The tip (11) mounted on the tip seat (10) provided on the head (4) is made of a hard material such as cemented carbide, coated cemented carbide, cermet, ceramic, diamond, cBN, etc. As shown in FIG. A mounting hole (11a) penetrating in the thickness direction is provided at the center, and a chip fixing screw (9) inserted through the mounting hole (11a) is provided on the bottom surface of the chip seat (10). The tip (11) is fixed to the tip seat (10) by being screwed onto a female screw (not shown). And the outer peripheral cutting edge (13a) facing the outer peripheral side of the boring tool (1) of the cutting edge (13) formed on the upper edge of the tip (11), and the leading end cutting edge ( 13b) are provided so as to protrude from the outer peripheral surface (4a) and the front end surface (4b) of the head (4), respectively.
上述の中ぐりバイト（１）によれば、切削時の切れ刃（１３）が受ける接線方向（図１の矢印Ｆｙ）及び径方向（図１の矢印Ｆｘ）の切削抵抗により該中ぐりバイト（１）の径方向又は円周方向の少なくともいずれか一方の振動が生じたとき、隣接する前記頭部（４）及び前記構成部材（６）は互いに、前記径方向及び前記円周方向に摺動可能であり、且つ該中ぐりバイト（１）の長手方向の端面を互いに押接されていることから、相互に隣接する構成部材（６）の摺動界面に生じる摩擦力により上記の径方向及び円周方向の振動を減衰することができる。したがって、前記振動による該中ぐりバイト（１）の工具びびりが大幅に抑制される。 According to the boring tool (1), the boring tool (13) is received by the cutting force in the tangential direction (arrow Fy in FIG. 1) and the radial direction (arrow Fx in FIG. 1). When the vibration of at least one of the radial direction and the circumferential direction of 1) occurs, the adjacent head part (4) and the component member (6) slide in the radial direction and the circumferential direction. Since the end faces in the longitudinal direction of the boring tool (1) are pressed against each other, the above radial direction and the frictional force generated at the sliding interface of the constituent members (6) adjacent to each other are possible. Circumferential vibration can be attenuated. Therefore, the tool chatter of the boring tool (1) due to the vibration is greatly suppressed.
また、該中ぐりバイト（１）の長手方向の長さが、前記構成部材（６）の個数によって適宜調整可能であるため、該中ぐりバイト（１）を刃物台等に把持する際、突き出し長さを簡易な方法で種々変更することができる。また、前記構成部材（６）を所定の厚さに設定することにより、この構成部材（６）が該中ぐりバイト（１）の突き出し長さのおよその目安となる。 Further, since the length of the boring bar (1) in the longitudinal direction can be appropriately adjusted depending on the number of the constituent members (6), the boring bar (1) is projected when gripped on a tool post or the like. The length can be variously changed by a simple method. Further, by setting the constituent member (6) to a predetermined thickness, the constituent member (6) becomes an approximate measure of the protruding length of the boring tool (1).
次に、上記の構成部材の変形例について、図３の（ｂ）〜（ｄ）を参照しながら説明する。図３の（ｂ）に例示するように、構成部材（６）の中央部に設けられた挿通穴（６ａ）と外周面（６ｂ）との間には、中心軸線（Ｏ）方向に沿って形成された貫通穴（６ｃ）が円周方向に略等配されている。なお、前記貫通穴（６ｃ）は挿通穴（６ａ）に開口しないことが好ましく、前記貫通穴（６ｃ）の直径、穴数は適宜選択可能であり、また、断面形状は円形に限定されることはなく、例えば多角形状、長円、楕円であってもよく、前記外周面（６ｂ）に開口していてもよい。また、貫通穴に限定されることはなく、止まり穴、又は、図３の（ｃ）及び（ｄ）に示されるような凹欠部（６ｄ）が形成されてもよい。上記の構成部材（６）を頭部（４）の後端側に複数個連結して該中ぐりバイト（１）のシャンク部を構成するが、構成する要領については、先に説明した実施の形態と同様である。 Next, modified examples of the above-described constituent members will be described with reference to FIGS. As illustrated in FIG. 3B, between the insertion hole (6a) provided in the central portion of the component member (6) and the outer peripheral surface (6b), along the central axis (O) direction. The formed through holes (6c) are substantially equally arranged in the circumferential direction. In addition, it is preferable that the said through-hole (6c) does not open to the penetration hole (6a), The diameter and the number of holes of the said through-hole (6c) can be selected suitably, and cross-sectional shape is limited to circular. For example, a polygonal shape, an ellipse, and an ellipse may be sufficient, and you may open to the said outer peripheral surface (6b). Moreover, it is not limited to a through hole, A blind hole or a recessed part (6d) as shown to (c) and (d) of FIG. 3 may be formed. A plurality of the structural members (6) are connected to the rear end side of the head (4) to form the shank portion of the boring tool (1). It is the same as the form.
以上に説明した他の実施の形態に係る中ぐりバイト（１）によれば、先の実施の形態にかかる中ぐりバイト（１）と同様に、相互に隣接する構成部材（６）の摺動界面に生じる摩擦力により工具本体（２）の径方向及び円周方向の振動を抑制する効果に加え、該中ぐりバイト（１）の工具本体（２）が軽量化することにより固有振動数が高められて、切削抵抗による振動数との乖離が大きくなるので、該中ぐりバイト（１）の共振が抑制される。 According to the boring tool (1) according to the other embodiment described above, sliding of the constituent members (6) adjacent to each other is performed as in the boring tool (1) according to the previous embodiment. In addition to the effect of suppressing vibration in the radial direction and circumferential direction of the tool body (2) by the frictional force generated at the interface, the natural frequency is reduced by reducing the weight of the tool body (2) of the boring tool (1). Since the deviation from the vibration frequency due to the cutting resistance is increased, resonance of the boring tool (1) is suppressed.
次に第２の実施の形態について、図４及び図５を参照しながら説明する。図４は第２の実施の形態に係る中ぐりバイトを示す図であり、（ａ）は平面図、（ｂ）は正面図である。図５は図４に示す中ぐりバイトに用いられる工具本体の頭部を示す図であり、（ａ）は平面図、（ｂ）は側面図である。図４に示されるように、この中ぐりバイト（１）において、工具本体（２）の係合軸部（５）は、頭部（４）とは、別個に形成された係合軸部材（５Ａ）から構成される。この係合軸部材（５Ａ）は、前記頭部（４）の中心軸線に沿って設けられた取付け穴（４ｃ）に挿通されて、前記係合軸部材（５Ａ）の係合軸部（５）を前記頭部（４）から一体的に長手方向の後端側に向かって突出している。 Next, a second embodiment will be described with reference to FIGS. 4A and 4B are views showing a boring tool according to the second embodiment, wherein FIG. 4A is a plan view and FIG. 4B is a front view. FIGS. 5A and 5B are views showing the head of the tool body used in the boring tool shown in FIG. 4, wherein FIG. 5A is a plan view and FIG. 5B is a side view. As shown in FIG. 4, in this boring tool (1), the engagement shaft portion (5) of the tool main body (2) is separated from the head (4). 5A). The engagement shaft member (5A) is inserted through a mounting hole (4c) provided along the central axis of the head (4), and the engagement shaft portion (5A) of the engagement shaft member (5A) is inserted. ) Projecting integrally from the head (4) toward the rear end side in the longitudinal direction.
第１の実施の形態と同様に、７つの構成部材（６Ａ、６Ｂ、…、６Ｇ）は、それぞれの挿通穴（６ａ）を前記頭部（４）か後端側に向かって延びる係合軸部（５）に嵌挿され、該工具本体（２）の長手方向に沿って並列され、さらに、最も後端側に位置する構成部材（６Ｇ）の後端側を向く端面を、前記係合軸部（５）に係合する係合部材（１２）によって前記頭部（４）側に向かって押圧されることにより、それぞれの構成部材（６Ａ、６Ｂ、…、６Ｇ）の長手方向を向く両端面を互いに押接される。そして、これら構成部材（６Ａ、６Ｂ、…、６Ｇ）がシャンク部を構成する。ここで、前記係合軸部材（５Ａ）及び前記係合部材（１２）は、具体的にはボルト及びナットからなるのが好ましい。このように、頭部（４）と係合軸部（５）を構成する係合軸部材（５Ａ）とが別個に設けられた場合にも、第１の実施の形態と同様に、該中ぐりバイト（１）の工具本体（２）の径方向及び円周方向の振動を減衰することにより、この振動による該中ぐりバイト（１）の工具びびりを大幅に抑制する効果が得られる。また、図５に示されるように、頭部（４）の後端側を向く端面から先端側に向かって止まり穴を設けて軽量化した場合には、工具本体（２）が軽量化することから固有振動数が高められて、切削抵抗による振動数との乖離が大きくなるので、該中ぐりバイト（１）の共振が抑制される。 As in the first embodiment, the seven component members (6A, 6B,..., 6G) have engagement shafts extending through the insertion holes (6a) from the head (4) toward the rear end side. The end surface of the component member (6G) which is inserted into the portion (5) and is arranged in parallel along the longitudinal direction of the tool body (2) and faces the rear end side of the tool main body (2) is By being pressed toward the head (4) side by the engaging member (12) engaged with the shaft portion (5), the constituent members (6A, 6B, ..., 6G) face in the longitudinal direction. Both end surfaces are pressed against each other. And these structural members (6A, 6B, ..., 6G) comprise a shank part. Here, it is preferable that the engagement shaft member (5A) and the engagement member (12) are specifically composed of bolts and nuts. Thus, even when the head (4) and the engagement shaft member (5A) constituting the engagement shaft portion (5) are provided separately, as in the first embodiment, By dampening the vibration in the radial direction and the circumferential direction of the tool body (2) of the boring tool (1), an effect of greatly suppressing the tool chatter of the boring tool (1) due to this vibration can be obtained. Moreover, as shown in FIG. 5, when a blind hole is provided from the end surface facing the rear end side of the head (4) toward the front end side to reduce the weight, the tool body (2) is reduced in weight. Since the natural frequency is increased and the deviation from the frequency due to the cutting resistance is increased, the resonance of the boring tool (1) is suppressed.
次に、第３の実施の形態について、図６を参照しながら説明する。図６は第３の実施の形態に係る中ぐりバイトを示す図であり、（ａ）は平面図、（ｂ）は正面図である。先の実施の形態においては、工具本体（２）のシャンク部は、複数の構成部材から構成されていたが、この実施の形態においては、図６に示すように、シャンク部が工具本体（２）の後端部に配設された略円柱状をなすシャンク部材（２０）で構成される。そして、このシャンク部材（２０）と、頭部（４）と、これらシャンク部（２０）と頭部（４）との間に配設される複数の構成部材（６）とが工具本体（２）の長手方向に連結されて工具本体（２）を構成している。頭部（４）から後端側に向かって延びる係合軸部（５）は、第２の実施の形態と同様に、前記頭部（４）とは、別個に形成された係合軸部材（５Ａ）から構成される。この係合軸部材（５Ａ）は、前記頭部（４）の中心軸線に沿って設けられた取付け穴（４ｃ）に挿通されて、前記係合軸部材（５Ａ）の係合軸部（５）を前記頭部（４）から長手方向の後端側に向かって延出している。２つの構成部材（６Ａ、６Ｂ）は、それぞれの挿通孔（６ａ）を前記係合軸部（５）に嵌挿され長手方向に並列に配設される。そして、前記係合軸部（５）が前記シャンク部材（２０）の先端側を向く端面に形成された係合穴（２０ａ）に係合することにより、２つの前記構成部材（６Ａ、６Ｂ）は、前記頭部（４）と前記シャンク部材（２０）とにより挟持され、長手方向を向く端面を互いに押接されている。この実施の形態においても、第１の実施の形態と同様に、該中ぐりバイト（１）の工具本体（２）の径方向及び円周方向の振動を減衰することにより、この振動による該中ぐりバイト（１）の工具びびりを大幅に抑制する効果が得られる。さらに、工具本体（２）のシャンク部が１つのシャンク部材（２０）から構成された場合には、構成部材（６）の使用数量を低減することができ、且つシャンク部の静剛性が高められる。 Next, a third embodiment will be described with reference to FIG. 6A and 6B are views showing a boring tool according to the third embodiment, wherein FIG. 6A is a plan view and FIG. 6B is a front view. In the previous embodiment, the shank portion of the tool body (2) was composed of a plurality of constituent members. In this embodiment, as shown in FIG. ) Is formed of a substantially cylindrical shank member (20) disposed at the rear end portion. The shank member (20), the head (4), and the plurality of constituent members (6) disposed between the shank (20) and the head (4) are the tool body (2). ) To form a tool body (2). The engaging shaft portion (5) extending from the head (4) toward the rear end side is formed separately from the head (4), as in the second embodiment. (5A). The engagement shaft member (5A) is inserted through a mounting hole (4c) provided along the central axis of the head (4), and the engagement shaft portion (5A) of the engagement shaft member (5A) is inserted. ) From the head (4) toward the rear end side in the longitudinal direction. The two structural members (6A, 6B) are arranged in parallel in the longitudinal direction by inserting the insertion holes (6a) into the engagement shaft portions (5). The engagement shaft portion (5) engages with an engagement hole (20a) formed in an end surface facing the distal end side of the shank member (20), whereby the two component members (6A, 6B) are engaged. Are sandwiched between the head (4) and the shank member (20), and the end surfaces facing the longitudinal direction are pressed against each other. Also in this embodiment, as in the first embodiment, the vibration in the radial direction and the circumferential direction of the tool main body (2) of the boring tool (1) is damped, so that An effect of greatly suppressing tool chatter of the round bite (1) can be obtained. Furthermore, when the shank part of the tool body (2) is composed of one shank member (20), the number of components (6) used can be reduced, and the static rigidity of the shank part is increased. .
次に、第４の実施の形態について、図７を参照しながら説明する。図７は第４の実施の形態に係るエンドミルを示す図であり、（ａ）は平面図、（ｂ）は正面図である。工具本体（２）を構成する頭部（４）、複数の構成部材（６Ａ、６Ｂ、…、６Ｇ）、係合軸部材（５Ａ）、係合部材（１２）の基本的な形態については、第２の実施の形態と同様であるが、この実施の形態においては、切れ刃（１３）が頭部（４）だけでなく、この頭部（４）の後端側に連結される構成部材（６）にも設けられたものである。 Next, a fourth embodiment will be described with reference to FIG. 7A and 7B are views showing an end mill according to a fourth embodiment, where FIG. 7A is a plan view and FIG. 7B is a front view. About the basic forms of the head (4), the plurality of constituent members (6A, 6B, ..., 6G), the engaging shaft member (5A), and the engaging member (12) constituting the tool body (2), Although it is the same as that of 2nd Embodiment, in this embodiment, the structural member by which a cutting blade (13) is connected not only to a head (4) but the rear-end side of this head (4). (6) is also provided.
図７の（ａ）に示されるように、頭部（４）及び前記頭部（４）の後端側に連結される４つの構成部材（６Ａ、６Ｂ、６Ｃ、６Ｄ）の外周面には、切りくず排出溝（７）が工具本体（２）の長手方向に沿って連続的に形成されており、この切りくず排出溝（７）のエンドミル（１）の回転方向（Ｋ）を向く壁面には、所定の位置に複数のチップ座（１０）が凹設されている。前記チップ座（１０）にねじ止めされた複数のチップ（１１）は、該エンドミル（１）の外周側に形成されたそれぞれの外周切れ刃（１３ａ）が工具本体（２）の外周面から突出するとともに、隣接する外周切れ刃（１３ａ）が互いに前記長手方向に一部をオーバーラップするように、長手方向に沿って配設されている。 As shown in FIG. 7 (a), the outer peripheral surfaces of the head (4) and the four constituent members (6A, 6B, 6C, 6D) connected to the rear end side of the head (4) The chip discharge groove (7) is continuously formed along the longitudinal direction of the tool body (2), and the wall surface of the chip discharge groove (7) faces the rotation direction (K) of the end mill (1). A plurality of chip seats (10) are recessed at predetermined positions. In the plurality of tips (11) screwed to the tip seat (10), the outer peripheral cutting edges (13a) formed on the outer peripheral side of the end mill (1) protrude from the outer peripheral surface of the tool body (2). In addition, adjacent outer peripheral cutting edges (13a) are arranged along the longitudinal direction so as to partially overlap each other in the longitudinal direction.
先に説明した実施の形態と同様に、このような構成を有したエンドミル（１）においても、工具本体（２）の接線方向及び径方向の切削抵抗により該工具本体（２）の径方向又は円周方向の少なくともいずれか一方の振動が生じたとき、長手方向に隣接する前記頭部（４）及び前記構成部材（６Ａ、６Ｂ、…、６Ｇ）は互いに、前記径方向及び前記円周方向に摺動可能であり、且つ該工具本体（２）の長手方向を向く端面を互いに押接されていることから、相互に隣接する構成部材（６）の摺動界面に生じる摩擦力により上記の径方向及び円周方向の振動を減衰することができる。特に、該工具本体（２）の長手方向に非常に長い外周切れ刃（１３ａ）を有するエンドミルのように、径方向及び円周方向に大きな切削抵抗が断続的に発生し、工具本体（２）のびびり振動あるいは共振が発生しやすい切削工具の場合には、上述した振動を減衰する効果がきわめて有効となる。また、頭部（４）及び／又は構成部材（６）に凹欠部、貫通孔、止まり穴の少なくともいずれか１つが設けられる場合には、該エンドミル（１）の工具本体（２）が軽量化することにより固有振動数が高められて、切削抵抗による振動数との乖離が大きくなるので、該エンドミル（１）の共振が抑制される。 Similarly to the embodiment described above, even in the end mill (1) having such a configuration, the tool body (2) has a radial direction or a cutting force in the tangential direction and the radial direction of the tool body (2). When at least one vibration in the circumferential direction occurs, the head (4) and the constituent members (6A, 6B, ..., 6G) adjacent in the longitudinal direction are mutually in the radial direction and the circumferential direction. Since the end surfaces facing the longitudinal direction of the tool body (2) are pressed against each other, the frictional force generated at the sliding interface between the constituent members (6) adjacent to each other causes The vibration in the radial direction and the circumferential direction can be attenuated. In particular, like an end mill having a very long outer peripheral cutting edge (13a) in the longitudinal direction of the tool body (2), large cutting resistance is intermittently generated in the radial direction and the circumferential direction, and the tool body (2) In the case of a cutting tool in which chatter vibration or resonance tends to occur, the above-described effect of damping vibration is extremely effective. Further, when the head (4) and / or the component member (6) is provided with at least one of a recess, a through hole, and a blind hole, the tool body (2) of the end mill (1) is lightweight. As a result, the natural frequency is increased and the deviation from the frequency due to the cutting resistance is increased, so that the resonance of the end mill (1) is suppressed.
なお、この実施の形態に係るエンドミル（１）では、頭部（４）から構成部材（６Ａ、６Ｂ、６Ｃ、６Ｄ）にわたって切りくず排出溝（７）と外周切れ刃（１３ａ）とが形成されるため、前記頭部（４）と前記構成部材（６Ａ、６Ｂ、６Ｃ、６Ｄ）との円周方向の位置決めを簡易に行うようにするため、前記頭部（４）と構成部材（６）とは、円周方向の位置決め手段を備えていることが好ましい。この位置決め手段の具体的な手段としては、例えば、図８に示されるように、頭部（４）、構成部材（６）に設けられた貫通穴（６ｃ）又は止まり穴（６ｄ）に嵌入されたピン（３０）を、隣接する頭部（４）又は構成部材（６）に設けられた貫通穴（６ｃ）又は止まり穴（６ｄ）に嵌挿してなる位置決め手段が考えられる。 In the end mill (1) according to this embodiment, a chip discharge groove (7) and an outer peripheral cutting edge (13a) are formed from the head (4) to the constituent members (6A, 6B, 6C, 6D). Therefore, in order to easily position the head (4) and the constituent members (6A, 6B, 6C, 6D) in the circumferential direction, the head (4) and the constituent members (6) Is preferably provided with a circumferential positioning means. As specific means of this positioning means, for example, as shown in FIG. 8, it is fitted into a through hole (6c) or a blind hole (6d) provided in the head (4), the component member (6). Positioning means formed by fitting the pin (30) into a through hole (6c) or a blind hole (6d) provided in the adjacent head (4) or component (6) can be considered.
本発明は、以上に説明した中ぐりバイト及びエンドミルに限定されることなく、例えば、バイト全般、ドリル、ボーリングカッタ、リーマ等の比較的長尺な切削工具に適用可能である。また、以上説明した本発明に係る実施の形態において、本発明の要旨を逸脱しない範囲で、上記に特に説明してない追加、変更、代替および削除が可能である。 The present invention is not limited to the boring tools and end mills described above, and can be applied to relatively long cutting tools such as general tools, drills, boring cutters, and reamers. Further, in the embodiment according to the present invention described above, additions, changes, substitutions and deletions not particularly described above are possible without departing from the gist of the present invention.
１ 中ぐりバイト、エンドミル
２ 工具本体
４ 頭部
４ｃ 取付け穴
４ｄ 止まり穴
５ 係合軸部
５Ａ 係合軸部材
６、６Ａ、６Ｂ、…、６Ｇ 構成部材
６ａ 挿通穴
６ｃ 貫通穴
６ｄ 凹欠部
７ 切りくず排出溝
１０ チップ座
１１ チップ
１２ 係合部材
１３ 切れ刃
１３ａ 外周切れ刃
１３ｂ 先端切れ刃
２０ シャンク部材
３０ ピン
DESCRIPTION OF
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004150443A JP2005329509A (en) | 2004-05-20 | 2004-05-20 | Cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004150443A JP2005329509A (en) | 2004-05-20 | 2004-05-20 | Cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2005329509A true JP2005329509A (en) | 2005-12-02 |
Family
ID=35484487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004150443A Withdrawn JP2005329509A (en) | 2004-05-20 | 2004-05-20 | Cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2005329509A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090187270A1 (en) * | 2008-01-22 | 2009-07-23 | Valenite, Llc | Method to align characteristic frequency of material removal tool and rotation speed of spindle of machine tool and material removal tool so aligned |
| JP2010521322A (en) * | 2007-03-14 | 2010-06-24 | バレナイト リミティド ライアビリティ カンパニー | Material removal tool with increased rigidity by spacers arranged along the length |
| US8425164B2 (en) * | 2006-12-06 | 2013-04-23 | Rego-Fix Ag | Method and device for balancing a tool coupling |
| US8702352B2 (en) | 2010-03-17 | 2014-04-22 | Sandvik Intellectual Property Ab | Milling tool for cutting machining |
| US8956092B2 (en) | 2009-05-25 | 2015-02-17 | Sandvik Intellectual Property Ab | Device and method for milling of materials |
| JP2015110257A (en) * | 2013-11-08 | 2015-06-18 | 株式会社神戸製鋼所 | Tool holder provided with vibration isolation means |
| US20150283628A1 (en) * | 2014-04-07 | 2015-10-08 | Kennametal Inc. | Rotary cutting tool with increased stiffness and method of assembling same |
| US9221141B1 (en) * | 2013-02-27 | 2015-12-29 | The Boeing Company | Tuned mass tool holder |
| CN108247090A (en) * | 2018-03-12 | 2018-07-06 | 苏州帕普乐精密工具有限公司 | A kind of numerical control chamfering tool |
| RU2692537C1 (en) * | 2018-11-14 | 2019-06-25 | Акционерное общество "Свердловский инструментальный завод" | Boring cutter |
-
2004
- 2004-05-20 JP JP2004150443A patent/JP2005329509A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8425164B2 (en) * | 2006-12-06 | 2013-04-23 | Rego-Fix Ag | Method and device for balancing a tool coupling |
| JP2010521322A (en) * | 2007-03-14 | 2010-06-24 | バレナイト リミティド ライアビリティ カンパニー | Material removal tool with increased rigidity by spacers arranged along the length |
| US7815403B2 (en) * | 2007-03-14 | 2010-10-19 | Valenite Llc | Material removal tool stiffened with spacers arranged along a length |
| US20090187270A1 (en) * | 2008-01-22 | 2009-07-23 | Valenite, Llc | Method to align characteristic frequency of material removal tool and rotation speed of spindle of machine tool and material removal tool so aligned |
| US8529173B2 (en) * | 2008-01-22 | 2013-09-10 | Valenite, Llc | Method to align characteristic frequency of material removal tool and rotation speed of spindle of machine tool and material removal tool so aligned |
| US8956092B2 (en) | 2009-05-25 | 2015-02-17 | Sandvik Intellectual Property Ab | Device and method for milling of materials |
| US8702352B2 (en) | 2010-03-17 | 2014-04-22 | Sandvik Intellectual Property Ab | Milling tool for cutting machining |
| US9221141B1 (en) * | 2013-02-27 | 2015-12-29 | The Boeing Company | Tuned mass tool holder |
| JP2015110257A (en) * | 2013-11-08 | 2015-06-18 | 株式会社神戸製鋼所 | Tool holder provided with vibration isolation means |
| US20150283628A1 (en) * | 2014-04-07 | 2015-10-08 | Kennametal Inc. | Rotary cutting tool with increased stiffness and method of assembling same |
| US9764394B2 (en) * | 2014-04-07 | 2017-09-19 | Kennametal Inc. | Rotary cutting tool with increased stiffness and method of assembling same |
| CN108247090A (en) * | 2018-03-12 | 2018-07-06 | 苏州帕普乐精密工具有限公司 | A kind of numerical control chamfering tool |
| RU2692537C1 (en) * | 2018-11-14 | 2019-06-25 | Акционерное общество "Свердловский инструментальный завод" | Boring cutter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070807 |