JPH09232U - Throw-away tip for ball end mill - Google Patents
Throw-away tip for ball end millInfo
- Publication number
- JPH09232U JPH09232U JP1257896U JP1257896U JPH09232U JP H09232 U JPH09232 U JP H09232U JP 1257896 U JP1257896 U JP 1257896U JP 1257896 U JP1257896 U JP 1257896U JP H09232 U JPH09232 U JP H09232U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- throw
- chip
- inclined side
- linear
- 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
Links
Landscapes
- Milling Processes (AREA)
Abstract
(57)【要約】
【目的】 ２枚刃以上のタイプで、切削性に優れ、か
つ、チップの取付強度および取付精度の良い高性能なボ
ールエンドミル用スローアウェイチップを提供すること
を目的とする。
【構成】 ボールエンドミル用スローアウェイチップに
おいて、前記チップは、略１／４円状の円弧傾斜側面と
これに連なる直線状傾斜側面とをチップ中央取り付け穴
を基準に点対称になし、前記円弧傾斜側面と前記直線状
傾斜側面とが交わる交線側の直線状傾斜側面、および該
側面または該側面の仮想延長線上と前記交線側で９０度
以下の鋭角で交わる底面に設けられた直線状凸部または
凹部の１側面とがチップ取り付け基準側面となる如く、
かつ、前記直線状凸部又は凹部をエンドミルの回転中心
に対し９０度以下の角度で交叉する如く止めネジを介し
て取り付けることにより構成する。
(57) [Summary] [Purpose] It is an object to provide a high-performance throw-away tip for ball end mills, which is a type with two or more blades, has excellent machinability, and has good tip attachment strength and attachment accuracy. . [Structure] In a throw-away tip for a ball end mill, the tip has an approximately 1/4 circular arc-shaped inclined side surface and a linear inclined side surface which is continuous with the circularly-shaped inclined side surface in point symmetry with respect to a tip central mounting hole. A linear inclined side surface on the intersection line side where the side surface and the linear inclined side surface intersect, and a linear convex provided on the bottom surface that intersects the side surface or a virtual extension line of the side surface at an acute angle of 90 degrees or less on the intersection line side. So that one side of the part or the recess becomes the reference side for mounting the chip,
In addition, the linear convex portion or the concave portion is attached via a set screw so as to intersect the rotation center of the end mill at an angle of 90 degrees or less.
Description
【０００１】[0001]
本願考案は、フライス盤等で使用されるスローアウェイ式ボールエンドミル、 特にボールエンドミルにおけるスローアウェイチップ（以下、単にチップと呼ぶ こともある。）の切刃構成および該チップの取付構造の改良に関する。 The present invention relates to a throw-away type ball end mill used in a milling machine or the like, and more particularly to an improvement in a cutting blade configuration of a throw-away tip (hereinafter sometimes simply referred to as a tip) in a ball end mill and an attachment structure of the tip.
【０００２】[0002]
これまで円弧切刃部を有する複数刃のボールエンドミルのうち、高速度鋼や超 硬合金よりなるソリッドタイプのものや切刃部に超硬合金をロー付けした付刃タ イプのものでは、外周刃のねじれ角を生かして切削性能に優れるＳ字刃形（ボー ルエンドミルの底面視において、切刃稜がＳ字近似的に成されている。）のもの が使用されている。 しかし、スローアウェイ式タイプのものではその形状的制約からＳ字刃形とし たものは無く、その代わり回転軸中心付近の切刃を凸状円弧曲線としたもの等が 提案されている。（例えば、実開昭６０−１００１１３号公報） また、外径寸法が、３０ｍｍ前後以下の比較的小径のものにおいても、最近の 高能率加工の点から１枚刃のものより、テーブル送り量がかせげる２枚刃タイプ のものの開発が強く要望されている。 Among the multi-blade ball end mills with arc cutting edges, solid type made of high-speed steel or cemented carbide and blade type with cemented carbide brazed on the cutting edge An S-shaped flute with excellent cutting performance by utilizing the helix angle of the blade (the cutting edge is approximately S-shaped in the bottom end view of the ball end mill) is used. However, there is no throwaway type S-shaped blade due to its shape limitation, and instead, a cutting edge near the center of the rotation axis has been proposed as a convex arc curve. (For example, Japanese Utility Model Laid-Open No. 60-100113) In addition, even when the outer diameter size is relatively small around 30 mm or less, the table feed amount is higher than that of the single-edged one from the viewpoint of recent high efficiency machining. There is a strong demand for the development of a two-flute type that can be earned.
【０００３】 しかし、通常のスクエァタイプのエンドミルに比べボールエンドミルでは、切 削中の切削抵抗のうち、軸方向の切削抵抗である背分力が大きくなる。よって、 チップ取付基準面の拘束面となる２つの側面が鈍角に交わるもの（例えば、実開 昭５８−２２２１１号公報。）では、切削中の軸方向の背分力を工具本体チップ の側壁ではなくネジ自体受ける割合が大きくなるため、重切削になるほどチップ が動きやすくなる。よって、ビビリ発生しやすくなり、また加工前のチップＲ精 度を維持することも難しい。However, in a ball end mill, a back force, which is a cutting resistance in the axial direction, of the cutting resistance during cutting is larger than that of a normal square type end mill. Therefore, in the case where the two side surfaces that are the constraining surfaces of the tip mounting reference surface intersect at an obtuse angle (for example, Japanese Utility Model Laid-Open No. 58-22211), the axial back force during cutting is applied to the side wall of the tool body tip. Since the ratio of receiving the screw itself becomes large, the insert becomes easier to move with heavy cutting. Therefore, chattering is likely to occur, and it is also difficult to maintain the chip R accuracy before processing.
【０００４】 本考案は、上記の点に鑑みなされたもので、ボールエンドミルに用いるスロー アウェイチップで、切削性に優れ、かつ、チップの取付強度および取付精度の良 い高性能なスローアウェイチップを提供することを目的とする。The present invention has been made in view of the above points, and is a throw-away tip for use in a ball end mill, which is a high-performance throw-away tip having excellent machinability and good tip mounting strength and accuracy. The purpose is to provide.
【０００５】[0005]
上記目的を達成するため、本願考案は、工具本体の先端ボール部に設けられた チップポケット部内のチップ座に、逃げ角を有するポジタイプのスローアウェイ チップを機械的に着脱可能にとりつけ、該チップの円弧切り刃部の回転軌跡が半 球状を呈するように形成したスローアウェイ式ボールエンドミルに使用するスロ ーアウェイチップであって、前記スローアウェイチップは、略１／４円状の円弧 傾斜側面とこれに連なる直線状傾斜側面とをチップ中央取り付け穴を基準に点対 称になし、前記円弧傾斜側面と前記直線状傾斜側面とが交わる交線側の直線状傾 斜側面、および該側面または該側面の仮想延長線上と前記交線側で９０度以下の 鋭角で交わる底面に設けられた直線状凸部または凹部の１側面とがチップ取り付 け基準側面となる如く、かつ、その底面には直線状凸部又は凹部を前記直線状傾 斜側面に対し９０度以下の角度で交叉する如く止めネジを介して取り付けるボー ルエンドミル用スローアウェイチップである。 In order to achieve the above-mentioned object, the present invention mechanically and detachably mounts a positive type throw-away tip having a clearance angle to a tip seat in a tip pocket portion provided in a tip ball portion of a tool body. A throw-away tip for use in a throw-away type ball end mill formed so that the rotation locus of a circular-arc cutting edge has a hemispherical shape. The throw-away tip is a circular arc inclined side surface of approximately 1/4 circle and And a linear inclined side surface continuous with the linear inclined side surface on the intersection line side where the circular arc inclined side surface and the linear inclined side surface intersect, and the side surface or the side surface. One side surface of the linear convex portion or the concave portion provided on the bottom surface that intersects with the virtual extension line of and at the intersection line at an acute angle of 90 degrees or less is the reference side surface for chip attachment. As, and a throw-away tip for ball end mill for mounting through a setscrew as to intersect at an angle of 90 degrees or less linear projections or recesses with respect to the linear inclination swash side on its bottom surface.
【０００６】[0006]
本願考案によれば、前記チップのうち少なくとも主チップは、円弧切り刃部と 交わる側の直線状傾斜側面、およびチップ底面に設けた直線状凸部の１側面とが チップ取り付け基準側面となり、かつ該２側面の交わる取り付け角を９０度以下 の角度となるようにチップ座に取り付けられているので、切削時の切削抵抗をこ の直角以下の鋭角で交わる本体チップ座の２側壁で受ける形となり、チップ取り 付け強度およびチップ取り付け精度を著しく向上させることができる。 更に、底面視における主チップと副チップの円弧状刃部が略同一形状で、かつ 両方で略Ｓ字状を呈するようにしたので、切削時における切り刃稜は３次元的と なり、喰い付き時における機械的衝撃を一度に全切り刃部で受けることなく滑ら かな切削を行うことができる。 これらの相乗効果により、滑らかな切削をを行うことにより生ずる切削力の増 加をチップの取り付けを工夫することによりそり強度・精度を維持・向上させる ことができたものである。 According to the invention of the present application, at least the main tip of the tips has the linear inclined side surface on the side intersecting with the arc cutting blade portion and one side surface of the linear convex portion provided on the bottom surface of the tip as the tip attachment reference side surface, and Since it is attached to the chip seat so that the mounting angle where the two side faces intersect is 90 degrees or less, the cutting resistance at the time of cutting is received by the two side walls of the main body chip seat that intersect at an acute angle less than this right angle. The chip mounting strength and the chip mounting accuracy can be remarkably improved. Further, the arcuate blades of the main chip and the sub-chip in bottom view have substantially the same shape, and both have a substantially S-shape, so the cutting edge during cutting becomes three-dimensional, and biting It is possible to perform smooth cutting without receiving mechanical impact at one time on all cutting edges. Due to these synergistic effects, it was possible to maintain and improve the warping strength and precision by improving the cutting force generated by performing smooth cutting and by devising the attachment of the tip.
【０００７】 また、副チップのチップ座への取り付けを上記主チップと同様にすると、副チ ップの切り刃先端位置をより軸中心付近に近ずけることができ、副チップによる 刃数の増加を有効に活用することができる。Further, if the sub-tip is attached to the tip seat in the same manner as the above-mentioned main tip, the tip position of the cutting edge of the sub-tip can be brought closer to the center of the axis, and the number of blades by the sub-tip can be reduced. The increase can be used effectively.
【０００８】[0008]
以下、本考案の１実施例を図面を参照して説明する。 図１乃至図３は、本考案に係わるスローアウェイ式ボールエンドミルで、工具 本体１の先端ボール部には、主チップ２と副チップ３が、軸中心線４に対して略 １８０度の位置にあるチップポケット部に連なるチップ座にそれぞれ上面にある 取付穴を介して止めネジ７により着脱可能に固定されている。すなわち、本図の ものは、軸中心線４を含んで切刃を有する主チップ２と軸中心部を除いて切刃を 有する１個の副チップ３とからなる２枚刃タイプのスローアウェイ式ボールエン ドミルである。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a throw-away type ball end mill according to the present invention, in which a main chip 2 and a sub-chip 3 are provided at a tip ball portion of a tool main body 1 at a position approximately 180 degrees with respect to a shaft center line 4. It is detachably fixed to a chip seat connected to a certain chip pocket portion with a set screw 7 through a mounting hole on the upper surface. That is, the one shown in the figure is a two-blade type throw-away type, which is composed of a main tip 2 having a cutting edge including a shaft center line 4 and one sub-tip 3 having a cutting edge excluding the shaft center portion. It is a ball end mill.
【０００９】 上記主チップ２は、図４および図５に示すように、中央取付穴を基準に点対称 の位置に略１／４円状の円弧傾斜側面２１ａ、２１ｂとこれに連なる直線状傾斜 側面２２ａ、２２ｂを有し、該円弧傾斜側面と直線状傾斜側面との２つの交線２ ３ａ、２３ｂ間ですくい面となる上面２４を半径Ｒ１の凸状円筒曲面とし、該上 面２４と前記円弧および直線状傾斜側面との交線を切刃部２５とするものである 。また、該チップ２の平面であるチップ底面２６には、直線状凹部２７が前記交 線２３ａ側の直線状傾斜側面２２ｂの仮想延長上とのなす角である取付角θが９ ０度以下で交わるように設けられている。（図４ではθ＝７５度） また、基本形状を主チップ２と同じくする副チップ３は、主チップ２を重ねた 場合の主チップ２の外観を１点鎖線で示した図７および図８より明らかなように 、上面視で該主チップ３より小さな相似形をしている。この主チップおよび副チ ップの上面を凸状円筒曲面とすることによって、該エンドミル底面視における両 チップの切刃稜が略Ｓ字状を呈するようにすることができる。 尚、このＳ字状は、半径Ｒ１の大きさや同じ半径Ｒ１の大きさや同じ半径Ｒ１ の大きさでも図６のように直線状傾斜側面２２ａ、２２ｂ間での凸状円筒曲面と することによって、よりＳ字形状を鮮明することができる。 尚、この場合の副チップ３としては、図６のように主チップ２と相似形するに する必要はなく、直線状傾斜側面２２ａ、２２ｂの長さを大きくして、該チップ セット時における外周切刃の長さを増すことも、本考案の技術思想の範囲である 。As shown in FIG. 4 and FIG. 5, the main chip 2 has arc-shaped inclined side surfaces 21a and 21b of approximately 1/4 circular shape and linear inclinations connected to the arc-shaped inclined side surfaces 21a and 21b, which are point-symmetrical with respect to the central mounting hole. An upper surface 24 having side surfaces 22a and 22b, which is a rake surface between the two intersecting lines 23a and 23b of the arcuate inclined side surface and the linear inclined side surface, is a convex cylindrical curved surface with a radius R1, and the upper surface 24 and The intersecting line between the arc and the linear inclined side surface is the cutting edge portion 25. Further, on the chip bottom surface 26 which is the plane of the chip 2, the mounting angle θ which is an angle formed by the linear concave portion 27 with the virtual extension of the linear inclined side surface 22b on the side of the line 23a is 90 degrees or less. It is provided to intersect. (Θ = 75 degrees in FIG. 4) Further, the sub chip 3 having the same basic shape as the main chip 2 is shown in FIG. 7 and FIG. 8 in which the external appearance of the main chip 2 when the main chips 2 are stacked is shown by a chain line. As is clearer, it has a similar shape smaller than the main chip 3 in a top view. By making the upper surfaces of the main tip and the sub-tip a convex cylindrical curved surface, the cutting edge ridges of both tips in a bottom view of the end mill can be made to have a substantially S shape. It should be noted that, even if the radius R1 is the same, the radius R1 is the same, or the radius R1 is the same, the S-shape is a convex cylindrical curved surface between the linear inclined side surfaces 22a and 22b as shown in FIG. The S-shape can be made clearer. The sub chip 3 in this case does not have to be similar in shape to the main chip 2 as shown in FIG. 6, but the lengths of the linear inclined side surfaces 22a and 22b are increased to increase the outer circumference at the time of chip setting. Increasing the length of the cutting edge is also within the scope of the technical idea of the present invention.
【００１０】 そして、図９のように、上記主チップ２を挿入するチップ座５には、該チップ ５には、該チップの前記直線状傾斜側面２２ｂと前記チップ底面２６の直線状凹 部２７およびチップ底面２６がチップ取付基準面となる如く、側壁５１およびチ ップ座底面５２にチップ底面２６の直線状凹部２７に適合するチップ座底面凸部 ５３が取付角θ（図９ではθ＝７５度）で形成され、主チップ２の取付時には、 チップ上面２４上にある中央取付穴を介して止めネジ７の側圧が、側壁５１とチ ップ座底面凸部５３の側壁５１側に位置する側面５３１とに該チップ２を押しつ けるようになされている。よって、切削時の抵抗を工具本体１のチップ座側壁５ １と５３１とで受けることができ、該チップ２は安定してかつ確実にチップ座５ 内に受けることができ、該チップ２は安定して確実にチップ座５内に固定される 。また、副チップ３は、主チップ２と同様な形でチップ座内に固定されている。Then, as shown in FIG. 9, in the chip seat 5 into which the main chip 2 is inserted, the chip 5 has the linear inclined side surface 22 b of the chip and the linear concave portion 27 of the chip bottom surface 26. And the chip bottom surface 26 becomes the chip mounting reference surface, the chip seat bottom surface projection 53 adapted to the linear recess 27 of the chip bottom surface 26 is mounted on the side wall 51 and the chip seat bottom surface 52 at a mounting angle θ (θ = in FIG. 9). When the main chip 2 is mounted, the lateral pressure of the setscrew 7 is located on the side wall 51 and the side wall 51 side of the tip seat bottom convex portion 53 through the central mounting hole on the chip upper surface 24. The chip 2 is pressed against the side surface 531 to be formed. Therefore, the resistance at the time of cutting can be received by the chip seat side walls 51 and 531 of the tool body 1, the chip 2 can be stably and reliably received in the chip seat 5, and the chip 2 can be stabilized. And securely fixed in the tip seat 5. The sub chip 3 is fixed in the chip seat in the same manner as the main chip 2.
【００１１】 更にまた、図１０および図１１に示すように、主チップ２および副チップ３の 外周切刃部と略同一の回転軌跡上に４角形ポジチップの補助チップ１０を２個軸 方向にずらして止めネジ７により固定し外周刃を形成することにより、深切り込 み加工や切り込み深さが変動する作業にも適用させることができる。 また、図１２の副チップ変形例のように、該チップ３’の取付基準面が直線状 傾斜側面３２ｂと、これと９０度以下の取付角θで交わる短返側面３９ｂと、底 面となるように形成すると、チップ座自体の加工が容易となるだけでなく、チッ プ座底面の直線状凸又は凹部の加工が省略できるので、副チップの取付強度およ び取付精度を低下させずにチップ座の加工も容易とすることができる。 但し、この場合、短返側面３９ａ、３９ｂを設けるため、図１３のように副チ ップ３’の切刃部先端３５１と主チップ２の切刃部先端３５１と主チップ２の切 刃部先端２５１との段差ｌが大きくなり、このｌの範囲においては副チップ３の 切刃部が存在しないため、切削時の主チップ切刃部の負担が大きくなる。 以上において主チップ２切刃部先端２５１を、図１４のように外周側より半径 ｒの曲面状面取りをしたり、又は直線状で面取り（図示せず。）、あるいは図１ ５のように、すくい面である上面２４側より半径Ｒ１の接線より大きな角度βで 直線状面取りしたり、又は半径Ｒ１より小さな半径で曲面状面取り（図示せず。 ）したり、更にこれら外周側面取りと上面側面取りを組み合わせたりして、切刃 部先端２５１の刃先強度を高めることも本願考案の技術思想の範囲であり、副チ ップについても同様である。Furthermore, as shown in FIG. 10 and FIG. 11, two auxiliary chips 10 of a quadrangular positive chip are axially displaced on the same rotation loci as the outer peripheral cutting edge portions of the main chip 2 and the sub chip 3. By fixing with the set screw 7 and forming the outer peripheral blade, it is possible to apply it to deep cutting processing or work in which the cutting depth varies. Further, as in the modified example of the sub-chip shown in FIG. 12, the mounting reference surface of the chip 3'is a straight inclined side surface 32b, a short return side surface 39b intersecting with the mounting side surface 32b at a mounting angle θ of 90 degrees or less, and a bottom surface. If it is formed in this way, not only the tip seat itself can be machined easily, but also the machining of the linear convex or concave part on the bottom surface of the chip seat can be omitted, so that the mounting strength and mounting accuracy of the sub chip are not reduced. The tip seat can be easily processed. However, in this case, since the short-return side surfaces 39a and 39b are provided, as shown in FIG. 13, the cutting edge tip 351 of the auxiliary chip 3 ′, the cutting edge tip 351 of the main chip 2, and the cutting edge portion of the main chip 2 are provided. The step l with the tip 251 becomes large, and since the cutting edge portion of the sub-tip 3 does not exist in this range of l, the burden on the cutting edge portion of the main chip during cutting becomes large. In the above, the tip 251 of the cutting edge of the main chip 2 is chamfered with a radius r from the outer peripheral side as shown in FIG. 14, or linearly chamfered (not shown), or as shown in FIG. Straight chamfering at an angle β larger than the tangent line of radius R1 from the side of the rake face 24, or curved chamfering (not shown) at a radius smaller than radius R1, and further peripheral chamfering and top side face It is also within the scope of the technical idea of the present invention to enhance the cutting edge strength of the cutting edge portion tip 251 by combining the cutting operations, and the same applies to the auxiliary chip.
【００１２】 更に、チップ底面の直線状凹部又は直線状凸部については、１ヶ所の直線状凹 部２７について説明したが、図１８のように、中央取り付け穴を基準に点対称に ２ヶ所の該凹部２７を設けたり、図１９、図２０のようにチップ底面２６側に直 線状凸部２９を設けても良い。 尚、図１８のように、該凹部２７を２ヶ所チップ側に設けた場合でも、上述の ように点対称に設けておけば、これに適合する本体側のチップ座底面凸部は１ヶ 所設けるだけでよい。Further, regarding the linear concave portion or the linear convex portion on the bottom surface of the chip, one linear concave portion 27 has been described, but as shown in FIG. 18, two linear symmetrical portions 27 are point-symmetrical with respect to the central mounting hole. The concave portion 27 may be provided, or the linear convex portion 29 may be provided on the chip bottom surface 26 side as shown in FIGS. As shown in FIG. 18, even if the recesses 27 are provided at two locations on the chip side, if they are provided point-symmetrically as described above, there is only one convex seat bottom convex portion on the main body side that fits this. All you have to do is provide it.
【００１３】[0013]
本考案は、スローアウェイ式ボールエンドミルにおけるチップを主チップと副 チップとに分け、かつ該エンドミル底面視において、主チップと副チップの切刃 稜は略同一形態で、この両方によって切刃部全体として略Ｓ字状を呈するように したので、切削性に優れ、切削時の衝撃を切刃部全体が一度に受けることがなく 、又主チップの他に副チップを設けているので、刃数の増加した分、機械のテー ブル送り量を増すこともでき、より高性能なボールエンドミルとすることができ る。 また、前記主チップの取付基準面の拘束面を直線状傾斜側面および該側面の仮 想延長線と９０度以下で交わる底面に設けた直線状凹部又は凸部の１側面とした ので、チップ取付強度および取付精度が優れる。また、副チップを主チップと同 様な取付構造とすれば、副チップの切刃部先端位置を、軸中心に位置する主チッ プの切刃部先端位置にさらに近づけることができ、より理想的なＳ字状を呈する スローアウェイ式ボールエンドミルを提供することができる。 According to the present invention, the insert in the throw-away type ball end mill is divided into a main insert and a sub-insert, and the cutting edges of the main insert and the sub-insert have substantially the same shape when viewed from the bottom of the end mill, and by both of these, the entire cutting edge portion is formed. Since it has a substantially S-shape, it has excellent machinability, the entire cutting edge is not subjected to the impact at the time of cutting at the same time, and the auxiliary tip is provided in addition to the main tip. The table feed amount of the machine can be increased by the amount of increase in the number of balls, resulting in a higher performance ball end mill. Further, since the restraint surface of the mounting reference surface of the main chip is one side surface of the linear inclined side surface and the linear concave portion or convex portion provided on the bottom surface intersecting the virtual extension line of the side surface at 90 degrees or less, Excellent strength and mounting accuracy. If the sub-tip has the same mounting structure as the main tip, the tip position of the cutting edge of the sub-tip can be made even closer to the tip position of the cutting edge of the main chip located at the center of the shaft, which is more ideal. It is possible to provide a throw-away type ball end mill that exhibits a typical S-shape.
【図１】図１は、本考案に係わるスローアウェイ式ボー
ルエンドミルの正面図を示す。FIG. 1 is a front view of a throw-away type ball end mill according to the present invention.
【図２】図２は、図１の側面図を示す。FIG. 2 shows a side view of FIG.
【図３】図３は、図１の底面図を示す。FIG. 3 shows a bottom view of FIG. 1;
【図４】図４は、主チップの正面図を示す。FIG. 4 shows a front view of a main chip.
【図５】図５は、図４の側面図を示す。FIG. 5 shows a side view of FIG.
【図６】図６は、他の実施例の場合の側面図を示す。FIG. 6 shows a side view of another embodiment.
【図７】図７は、副チップの正面図を示す。FIG. 7 shows a front view of a sub chip.
【図８】図８は、図７の側面図を示す。FIG. 8 shows a side view of FIG. 7;
【図９】図９は、主チップのチップ座の正面図を示す。FIG. 9 shows a front view of a chip seat of a main chip.
【図１０】図１０は、図９の右斜下方からの側面図を示
す。FIG. 10 is a side view from the lower right of FIG. 9;
【図１１】図１１は、本考案の応用例を示す補助チップ
付きスローアウェイ式ボールエンドミルの正面図を示
す。FIG. 11 is a front view of a throw-away type ball end mill with an auxiliary tip showing an application example of the present invention.
【図１２】図１２は、図１１の側面図を示す。FIG. 12 shows a side view of FIG. 11;
【図１３】図１３は、副チップの変形例の正面図を示
す。FIG. 13 is a front view of a modification of the sub chip.
【図１４】図１４は、副チップとして図１３のチップを
セットした時のスローアウェイ式ボールエンドミルの正
面図を示す。FIG. 14 is a front view of the throw-away type ball end mill when the tip of FIG. 13 is set as a sub tip.
【図１５】図１５は、主チップにおける外周側よりの曲
面状面取りを示す正面図を示す。FIG. 15 is a front view showing a curved chamfer from the outer peripheral side of the main chip.
【図１６】図１６は、主チップにおけるすくい面側より
の直線状面取りを示す一部省略正面図を示す。FIG. 16 is a partially omitted front view showing a straight chamfer from the rake face side of the main chip.
【図１７】図１７は、図１７の右斜下方からの側面図を
示す。FIG. 17 is a side view from the lower right side of FIG. 17;
【図１８】図１８は、主チップ底面の直線状凹部又は凸
部の変形例の側面図を示す。FIG. 18 is a side view of a modification of the linear concave or convex portion on the bottom surface of the main chip.
【図１９】図１９は、主チップ底面の直線状凹部又は凸
部の変形例の側面図を示す。FIG. 19 is a side view of a modification of the linear concave or convex portion on the bottom surface of the main chip.
【図２０】図２０は、主チップ底面の直線状凹部又は凸
部の変形例の側面図を示す。FIG. 20 is a side view of a modified example of the linear concave or convex portion on the bottom surface of the main chip.
１ 工具本体 ２ 主チップ ３ 副チップ ３’ 副チップ３の変形例 ４ 軸中心線 ５ チップ座 １０ 補助チップ ２１ａ、２１ｂ、３１ａ、３１ｂ 円弧傾斜側面 ２２ａ、２２ｂ、３２ａ、３２ｂ 直線状傾斜側面 ２３ａ、２３ｂ 交線 ２４ 上面 ２５ 切刃 ２６ チップ底面 ２７ 直線状凹部 ３９ａ、３９ｂ 短辺側面 ５１ 側壁 ５２ チップ座底面 ５３チップ座底面凸部 1 Tool Body 2 Main Tip 3 Sub Tip 3'Modification of Sub Tip 3 4 Axis Centerline 5 Tip Seat 10 Auxiliary Tip 21a, 21b, 31a, 31b Arc Inclined Sides 22a, 22b, 32a, 32b Linear Inclined Side 23a, 23b Crossing line 24 Upper surface 25 Cutting edge 26 Tip bottom surface 27 Linear recess 39a, 39b Short side surface 51 Side wall 52 Tip seat bottom surface 53 Tip seat bottom projection portion
Claims (1)
ップポケット部内のチップ座に、逃げ角を有するポジタ
イプのスローアウェイチップを機械的に着脱可能にとり
つけ、該チップの円弧切り刃部の回転軌跡が半球状を呈
するように形成したスローアウェイ式ボールエンドミル
に使用するスローアウェイチップであって、前記スロー
アウェイチップは、略１／４円状の円弧傾斜側面とこれ
に連なる直線状傾斜側面とをチップ中央取り付け穴を基
準に点対称になし、前記円弧傾斜側面と前記直線状傾斜
側面とが交わる交線側の直線状傾斜側面、および該側面
または該側面の仮想延長線上と前記交線側で９０度以下
の鋭角で交わる底面に設けられた直線状凸部または凹部
の１側面とがチップ取り付け基準側面となる如く、か
つ、その底面には直線状凸部又は凹部を前記直線状傾斜
側面に対し９０度以下の角度で交叉する如く止めネジを
介して取り付けることを特徴とするボールエンドミル用
スローアウェイチップ。1. A positive type throw-away tip having a clearance angle is mechanically detachably attached to a tip seat in a tip pocket portion provided in a tip ball portion of a tool body, and an arc cutting blade portion of the tip is rotated. A throw-away tip used for a throw-away type ball end mill formed so that its locus has a hemispherical shape, wherein the throw-away tip has a substantially quadrant circular arc-shaped inclined side surface and a linear inclined side surface continuous with this. A point symmetry with reference to the chip center mounting hole, a straight inclined side surface on the intersecting line side where the circular arc inclined side surface and the linear inclined side surface intersect, and the side surface or a virtual extension line of the side surface and the intersecting line side. At a sharp angle of 90 degrees or less on one side of the linear convex portion or concave portion provided on the bottom surface, and the bottom surface is a straight line. A throw-away tip for a ball end mill, characterized in that the convex portion or the concave portion is attached via a set screw so as to intersect the straight inclined side surface at an angle of 90 degrees or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1996012578U JP2577014Y2 (en) | 1996-11-25 | 1996-11-25 | Indexable inserts for ball end mills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1996012578U JP2577014Y2 (en) | 1996-11-25 | 1996-11-25 | Indexable inserts for ball end mills |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09232U true JPH09232U (en) | 1997-04-22 |
| JP2577014Y2 JP2577014Y2 (en) | 1998-07-23 |
Family
ID=11809249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1996012578U Expired - Lifetime JP2577014Y2 (en) | 1996-11-25 | 1996-11-25 | Indexable inserts for ball end mills |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2577014Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5167130U (en) * | 1974-11-15 | 1976-05-27 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272015U (en) * | 1985-10-25 | 1987-05-08 |
-
1996
- 1996-11-25 JP JP1996012578U patent/JP2577014Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272015U (en) * | 1985-10-25 | 1987-05-08 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5167130U (en) * | 1974-11-15 | 1976-05-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2577014Y2 (en) | 1998-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3775321B2 (en) | Throw-away inserts and throw-away cutting tools | |
| JP3503072B2 (en) | Rotary milling tools | |
| JP5232852B2 (en) | Cutting insert for milling cutter | |
| JP3951766B2 (en) | Throw-away inserts and throw-away cutting tools | |
| EP2065111B1 (en) | Rotary cutting tool | |
| WO2007142224A1 (en) | Cutting tool and cutting insert | |
| CA2697677A1 (en) | Cutting insert | |
| EP0307949A1 (en) | Ball end mill with throw away insert | |
| JP2014083667A (en) | Cutting insert and tip replaceable cutting tool | |
| JP4677747B2 (en) | Insert and throw-away cutting tools | |
| JP4821244B2 (en) | Throw-away tip and throw-away end mill | |
| JP2017080864A (en) | Cutting edge exchange-type reamer and reamer insert | |
| JP4449895B2 (en) | Throw-away inserts and throw-away cutting tools | |
| EP3970892A1 (en) | Cutting insert | |
| JP2557189Y2 (en) | End mill | |
| JP3118956B2 (en) | Indexable tip | |
| JPH084963Y2 (en) | Throw-away type ball end mill | |
| JPH09232U (en) | Throw-away tip for ball end mill | |
| JPH0524218U (en) | Drilling tool | |
| JPH0735701Y2 (en) | Throw-away type ball end mill | |
| JP3189657B2 (en) | Indexable cutting tools | |
| JP2019119022A (en) | Cutting insert and blade tip replaceable cutting tool | |
| JP4810903B2 (en) | Turning tools and high feed inserts | |
| JP2550759Y2 (en) | Radius ball end mill | |
| CN112543688B (en) | Cutting insert and indexable insert cutting tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |