JP2006198749A - Throw-away turning tool - Google Patents

Throw-away turning tool Download PDF

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JP2006198749A
JP2006198749A JP2005015252A JP2005015252A JP2006198749A JP 2006198749 A JP2006198749 A JP 2006198749A JP 2005015252 A JP2005015252 A JP 2005015252A JP 2005015252 A JP2005015252 A JP 2005015252A JP 2006198749 A JP2006198749 A JP 2006198749A
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tip
chip
flank
screw member
seating surface
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JP2005015252A
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Japanese (ja)
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Yuji Shinjo
裕二 新城
Daisuke Yoshiba
大助 吉葉
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Tungaloy Corp
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Tungaloy Corp
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Priority to JP2005015252A priority Critical patent/JP2006198749A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a throw-away turning tool for preventing scattering of a tip and preventing a sudden rise of cost of the body and tip. <P>SOLUTION: In this tool, the tip 10 is inserted into a tip mounting groove 3 provided in the body 2, and the tip 10 is pressed and fixed on a tip seated surface 33 formed on one of two wall surfaces 3Aa and 3Ba directed in the peripheral direction of the tip mounting groove 3 by a wedge member 20 inserted between the other of the wall surfaces 3Aa and 3Ba and the tip 10. In a screw member 40 mounted in the body 2, a part of a seat surface 41a of a head part 41 can be engaged by being arranged with a prescribed space from a part of a flank 10c of the tip 10 in the direction opposite to a direction C of centrifugal force applied to the tip 10 or in the direction crossing the direction C of the centrifugal force at an acute angle or is abutted or pressed on the part of the flank 10, to prevent scattering of the tip 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、高速切削に用いられるスローアウェイ式転削工具に関し、特に遠心力によるチップの飛散を防止する転削工具に関する。 The present invention relates to a throw-away type turning tool used for high-speed cutting, and more particularly to a turning tool that prevents scattering of a tip due to centrifugal force.

アルミニウム合金等の軟質材料の転削加工においては加工精度と加工能率を高めるため、通常の鋼材の切削にくらべ高い切削速度が要求されることが多い。そのため転削工具の回転数については数千〜数万回転/分の高回転領域に設定される。また近年では上記軟質材料以外、例えば鋳鉄等の転削加工においても高能率加工の要求が高まっており、耐熱性及び耐摩耗性の高いcBNを切削工具材料として用いた鋳鉄の高速切削が行われている。ところで、転削工具を高回転領域で使用した場合、チップを楔部材で押圧固定する転削工具ではチップに強大な遠心力が作用するため、チップが外部へ飛散してしまうおそれがあった。この問題を解決するため、図13に例示する従来正面フライス(S)では、チップ着座面(31)の外周方向、もしくは遠心力の方向と鋭角で交差する方向の先端に上方に凸部(T)を設けてチップ(3)の副切れ刃逃げ面と係合可能とすることによりチップ(3)の飛散を防止する(例えば、特許文献1参照)。一方、図14に例示する従来正面フライスでは、チップ(1)の形状を底面方向に幅広となる楔形に形成し、チップ(1)自身が遠心力の方向である外周方向への飛散出口を塞いで飛散をおさえる(例えば、特許文献2参照)。 In the rolling processing of soft materials such as aluminum alloys, in order to increase the processing accuracy and processing efficiency, a higher cutting speed is often required compared to the cutting of ordinary steel materials. Therefore, the rotation speed of the turning tool is set to a high rotation area of several thousand to several tens of thousands of rotations / minute. In recent years, demands for high-efficiency machining have been increasing in other than the above soft materials, such as cast iron, and high-speed cutting of cast iron using cBN having high heat resistance and high wear resistance as a cutting tool material has been performed. ing. By the way, when the cutting tool is used in a high rotation region, the cutting tool in which the tip is pressed and fixed by the wedge member has a strong centrifugal force acting on the tip, which may cause the tip to be scattered outside. In order to solve this problem, in the conventional face mill (S) illustrated in FIG. 13, a convex portion (T) is formed at the tip of the tip seating surface (31) in the outer circumferential direction or in the direction intersecting with the direction of centrifugal force at an acute angle. ) To prevent the tip (3) from scattering (see, for example, Patent Document 1). On the other hand, in the conventional face mill illustrated in FIG. 14, the shape of the tip (1) is formed in a wedge shape that is wide in the bottom direction, and the tip (1) itself closes the scattering outlet in the outer peripheral direction that is the direction of centrifugal force. (See, for example, Patent Document 2).

特許第3303184号Patent No. 3303184 特開平10−151514号公報JP-A-10-151514

しかしながら、図13の正面フライス(S)のようにチップ着座面(31)に凸部(T)を設ける方法は、ボデー(1)形状又はチップ着座面(31)を構成する部品形状が複雑になり、コストが高くなる問題があった。さらに、上記凸部(T)が破損や損傷した場合には、高価なボデー(1)又は前記部品を交換する必要があるため、ランニングコストが高騰するおそれがあった。一方、図14の正面フライスのようにチップ(1)の形状を底面方向に幅広となる楔形に形成する方法では、ISO規格のチップが使用できなくなるため、他の切削工具とのチップ互換性がなくなるほか、チップ(1)の使用コーナー数が減少することからチップ(1)のランニングコストが高騰するおそれがあった。 However, the method of providing the protrusion (T) on the chip seating surface (31) as in the face mill (S) of FIG. 13 is complicated in the shape of the body (1) or the parts constituting the chip seating surface (31). Therefore, there is a problem that the cost is increased. Furthermore, when the convex part (T) is broken or damaged, it is necessary to replace the expensive body (1) or the parts, so that the running cost may increase. On the other hand, in the method in which the shape of the tip (1) is formed in a wedge shape that is wider in the bottom surface direction like the face mill of FIG. 14, the ISO standard tip cannot be used, so that the tip compatibility with other cutting tools is achieved. In addition, the running cost of the chip (1) may increase due to a decrease in the number of corners used for the chip (1).

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、チップの飛散を防止するとともにボデー及びチップのコスト高騰を防止するスローアウェイ式転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 of the present invention is to provide a throw-away type rolling tool that prevents the scattering of the chips and prevents the cost of the body and the chips from rising.

上記の課題を解決するため、請求項1に記載の発明は、ボデーに設けたチップ取付け溝にチップを挿入し、前記チップ取付け溝の周方向を向く2つの壁面のうちの一方の壁面と前記チップとの間に挿入する楔部材によって、前記チップを他方の壁面に形成したチップ着座面に押圧し固定するスローアウェイ式転削工具において、前記ボデーに着脱可能に装着したねじ部材の頭部の座面の一部が、前記チップに作用する遠心力の方向と反対の方向又は前記遠心力の方向と鋭角で交差する方向に、前記チップの逃げ面の一部に対して所定の間隔をあけて配置されることによって係合可能であるか、又は、前記逃げ面の一部に対して当接もしくは押圧することを特徴とするスローアウェイ式転削工具である。 In order to solve the above problem, the invention according to claim 1 is characterized in that a chip is inserted into a chip mounting groove provided in a body, and one of the two wall surfaces facing the circumferential direction of the chip mounting groove and the wall In a throw-away type rolling tool that presses and fixes the tip against the tip seating surface formed on the other wall surface by a wedge member inserted between the tip and the tip of the screw member detachably attached to the body A part of the seating surface is spaced apart from a part of the flank of the tip in a direction opposite to the direction of the centrifugal force acting on the tip or a direction intersecting with the direction of the centrifugal force at an acute angle. It is a throw-away type rolling tool characterized in that it can be engaged by being arranged, or abuts against or presses against a part of the flank.

また、請求項2に記載の発明は、ボデーに設けたチップ取付け溝にチップを挿入し、前記チップ取付け溝の周方向を向く2つの壁面のうちの一方の壁面と前記チップとの間に保持具を挿入し、他方の壁面と前記チップとの間に挿入する楔部材によって、前記チップを前記保持具の上面に形成したチップ着座面に押圧し固定するスローアウェイ式転削工具において、前記保持具又は前記ボデーのいずれか一方に着脱可能に装着したねじ部材の頭部の座面の一部が、前記チップに作用する遠心力の方向と反対の方向又は前記遠心力の方向と鋭角で交差する方向に、前記チップの逃げ面の一部に対して所定の間隔をあけて配置されることによって係合可能であるか、又は、前記逃げ面の一部に対して当接もしくは押圧することを特徴とするスローアウェイ式転削工具である。 According to a second aspect of the present invention, a chip is inserted into a chip mounting groove provided on the body, and is held between one of the two wall surfaces facing the circumferential direction of the chip mounting groove and the chip. In the throw-away type rolling tool for inserting a tool and pressing and fixing the chip against a chip seating surface formed on the upper surface of the holder by a wedge member inserted between the other wall surface and the chip. A part of the seating surface of the head of the screw member detachably attached to either the tool or the body intersects the direction opposite to the direction of the centrifugal force acting on the chip or at an acute angle with the direction of the centrifugal force. In such a way that it can be engaged with a part of the flank of the chip at a predetermined interval, or abut or press against a part of the flank Thrower featuring E is a Lee-type milling tool.

請求項2に記載の発明において、前記ねじ部材の頭部の座面の一部が前記保持具を押圧し前記ボデーに固定することが好ましい。 In a second aspect of the present invention, it is preferable that a part of the seating surface of the head portion of the screw member presses the holder and fixes it to the body.

さらに、上記の発明において、前記ねじ部材の頭部の座面の一部は、前記チップの主切れ刃の逃げ面の一部に係合可能である。または、切削に使用されない副切れ刃又はコーナー刃のいずれか一方の逃げ面の一部に係合可能であってもよい。さらに、前記ねじ部材の頭部の座面と前記チップの逃げ面との間に座金を介装することが好ましい。 Furthermore, in the above invention, a part of the seating surface of the head of the screw member can be engaged with a part of the flank of the main cutting edge of the tip. Alternatively, it may be possible to engage with a part of the flank of either the secondary cutting edge or the corner cutting edge that is not used for cutting. Furthermore, it is preferable that a washer is interposed between the seating surface of the head of the screw member and the flank of the tip.

チップを楔部材によりボデーに装着した状態でボデーを高回転領域で使用すると、チップにはボデーの外周側に飛び出そうとする遠心力が作用するが、上記の構成を有する発明によれば、ボデーに装着されたねじ部材の座面の一部が遠心力の方向と反対の方向又は遠心力の方向と鋭角で交差する方向にチップの逃げ面の一部に対して所定の間隔をあけて配置されることによって係合可能であるか、又は、前記逃げ面の一部に対して当接もしくは押圧することによってチップの飛散を防止できる。また、ねじ部材は、ボデーに着脱可能に装着されるため、使用にともなう消耗や損傷が進んだとき容易に交換できる。図13の従来切削工具のようにチップ着座面に凸部を形成することが不要になるため、工具のボデー又はチップ着座面を構成する部品のコスト高騰を防止でき、凸部の破損や損傷に伴うボデー又は部品交換によるランニングコストの高騰を防止できる。しかも、一般的に市販されているボルト等をそのまま使用できるので、ねじ部材の供給が容易且つ低コストとなる。さらに、図14の従来切削工具のように飛散を防止するために特殊形状のチップとすることが不要になることから、ISO規格のチップをそのまま使用することができる。なお、ねじ部材の座面の一部が遠心力の方向と反対の方向又は遠心力の方向と鋭角で交差する方向にチップの逃げ面の一部に対して当接もしくは押圧する場合には、チップの着脱に際して、ねじ部材の操作が必要であるが、ねじ部材の座面の一部が上記の方向にチップの逃げ面の一部に対して所定の間隔をあけて配置される場合には、特にねじ部材を操作する必要がない点で好ましい。また、請求項2に記載の発明のように保持具を備えるとチップの飛散防止の機能に加えチップを位置決めする機能が向上する。 When the body is used in a high rotation region with the tip mounted on the body by the wedge member, a centrifugal force is exerted on the tip to jump out to the outer peripheral side of the body. However, according to the invention having the above configuration, A part of the seating surface of the screw member mounted on the tip is arranged at a predetermined interval with respect to a part of the flank face of the chip in a direction opposite to the direction of the centrifugal force or a direction intersecting with the direction of the centrifugal force at an acute angle. Thus, the chips can be engaged, or the chips can be prevented from scattering by abutting or pressing against a part of the flank. Further, since the screw member is detachably attached to the body, it can be easily replaced when wear or damage accompanying use has progressed. Since it is not necessary to form a convex portion on the chip seating surface as in the conventional cutting tool of FIG. 13, it is possible to prevent the cost of the parts constituting the tool body or the chip seating surface from rising, and damage or damage to the convex portion. It is possible to prevent an increase in running cost due to the accompanying body or parts replacement. In addition, since a commercially available bolt or the like can be used as it is, the screw member can be easily supplied at a low cost. Further, since it is not necessary to use a specially shaped chip to prevent scattering as in the conventional cutting tool of FIG. 14, an ISO standard chip can be used as it is. When a part of the seating surface of the screw member is in contact with or pressed against a part of the flank of the chip in a direction opposite to the direction of the centrifugal force or a direction intersecting with the direction of the centrifugal force at an acute angle, When attaching and detaching the chip, it is necessary to operate the screw member, but when a part of the seat surface of the screw member is arranged at a predetermined interval with respect to a part of the flank surface of the chip in the above direction. In particular, it is preferable in that it is not necessary to operate the screw member. Moreover, when the holder is provided as in the invention described in claim 2, the function of positioning the chip is improved in addition to the function of preventing the chip from scattering.

請求項3に記載の発明では、ねじ部材は、チップの飛散を防止する機能に加え保持具をボデーに固定する機能を有するため保持具の固定手段の簡略化及びコストの減少がはかられる。また、保持具を固定する他の固定手段とともに前記ねじ部材を用いた場合には、保持具をボデーにいっそう強固且つ確実に固定することができる。請求項4に記載の発明のように、ねじ部材の頭部の座面はチップの主切れ刃の逃げ面と係合可能とすることができる。この場合、ねじ部材は被削材に干渉しない位置、すなわち、切込み領域以外の領域の主切れ刃の逃げ面の一部と係合する位置に配設される。請求項5に記載の発明のように、ねじ部材を切削に使用されない副切れ刃の逃げ面と係合する位置に配設した場合には、上記切込み領域が増すため切込み量を大きく設定することが可能となる。請求項6に記載の発明のように、ねじ部材の頭部の座面とチップの逃げ面との間に座金を介装した場合には、ねじ部材の頭部の座面の消耗や損傷を抑止できる。前記座面はねじ部材の頭部に一体的に設けられてもよい。 In the invention described in claim 3, since the screw member has a function of fixing the holder to the body in addition to the function of preventing the chips from scattering, the fixing means for the holder can be simplified and the cost can be reduced. In addition, when the screw member is used together with other fixing means for fixing the holder, the holder can be more firmly and reliably fixed to the body. As in the fourth aspect of the invention, the seating surface of the head of the screw member can be engaged with the flank of the main cutting edge of the chip. In this case, the screw member is disposed at a position where it does not interfere with the work material, that is, a position where it engages with a part of the flank of the main cutting edge in a region other than the cutting region. When the screw member is disposed at a position that engages with the flank face of the secondary cutting edge that is not used for cutting as in the invention described in claim 5, the cutting area is increased, so that the cutting amount is set large. Is possible. When a washer is interposed between the seating surface of the head of the screw member and the flank of the tip as in the invention described in claim 6, the seating surface of the head of the screw member is worn or damaged. Can be suppressed. The seating surface may be provided integrally with the head of the screw member.

次に、本発明の第1の実施の形態について図を参照しながら説明する。図1は本発明を適用したスローアウェイ式転削工具の1例である正面フライスを先端側から見た図であり、図2及び図3は図1の左側面図である。図4〜図7は正面フライスの要部拡大図である。以下の説明において、正面フライス(1)のチップ(10)が装着される一端部側を「先端側」、主軸、アーバ又はミーリングチャック等への取付け面(2c)が形成された他端部側を「後端側」とよび、正面フライスの径方向の内方側及び外方側をそれぞれ「内周側」、「外周側」とよぶ。また、正面フライスの周方向を「周方向」とよび、図1中矢印Kで示される正面フライスの回転方向を「回転方向」とよぶ。 Next, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view of a front milling machine as an example of a throw-away type rolling tool to which the present invention is applied as viewed from the tip side, and FIGS. 2 and 3 are left side views of FIG. 4-7 is the principal part enlarged view of a face mill. In the following description, the one end side where the tip (10) of the face mill (1) is mounted is the "tip side", and the other end side where the attachment surface (2c) to the spindle, arbor or milling chuck is formed. Is called the “rear end side”, and the inner side and the outer side in the radial direction of the face mill are called “inner side” and “outer side”, respectively. Further, the circumferential direction of the face mill is referred to as “circumferential direction”, and the rotation direction of the face mill indicated by the arrow K in FIG. 1 is referred to as “rotation direction”.

図1及び図2に例示するように、この正面フライス(1)において、ボデー(2)の先端外周部には、ボデー(2)の先端面(2b)および外周面(2a)に開口する複数のチップ取付け溝(3)が周方向に略等間隔に設けられている。これらチップ取付け溝(3)は、チップ(10)及び保持具(30)が挿入されるチップ挿入部(3A)と、楔部材(20)が挿入される楔挿入部(3B)とから構成される。チップ挿入部(3A)に挿入される保持具(30)は、図4に例示するように、当該保持具(30)の内周側及び外周側を向く2つの側面(30c、30d)を貫通する取付け孔(31)に挿入されたねじ部材(40)によって固定されている。詳細には、このねじ部材(40)の頭部(41)は軸部(42)よりも直径が大きくフランジ形状を呈し、前記頭部(41)の座面(41a)は当該ねじ部材(40)の軸線(CLn)にほぼ垂直をなす平坦面で形成されている。このねじ部材(40)の軸部(42)のねじ部をチップ挿入部(3A)の径方向を向く底面(3Ab)に設けられた雌ねじ孔(4)にねじ込み、ねじ部材(40)の頭部(41)の座面(41a)の一部が保持具(30)の外周側を向く側面(30d)に当接するとともに押圧することによって、保持具(30)は、その回転方向(K)後方を向く下面(30b)及び径方向内方を向く側面(30c)を、それぞれに対応するチップ挿入部(3A)の周方向を向く壁面(3Aa)及び底面(3Ab)に当接した状態で固定されている。保持具(30)の回転方向(K)前方を向く上面(30a)には、チップ(10)が挿入、位置決めされるチップ座(32)が形成される。このチップ座(32)は、チップ(10)の下面(10b)と当接するチップ着座面(33)及びこのチップ着座面(33)から上方へ立ち上がり且つチップ(10)の隣接する2つの側面(10c)にそれぞれ当接する位置決め基準面(34、35)から形成されている。チップ座(32)をボデー(2)とは別個の保持具(30)に設けることによりチップ(10)の位置決め精度の点で有利となる。なお、チップ(10)は、チップ取付け溝(3)のチップ挿入部(3A)の周方向を向く壁面(3Aa)に設けられたチップ座(32)に直接挿入、位置決めされるか、又は、前記チップ座(32)にチップ着座面(33)として機能する単なる平板状の保持具(30)を介して挿入、位置決めされてもよい。保持具(30)を用いた場合、ねじ部材(40)は保持具(30)又はボデー(2)のうち少なくともいずれか一方に装着されていればよい。 As illustrated in FIG. 1 and FIG. 2, in this face mill (1), a plurality of openings at the front end surface (2b) and the outer peripheral surface (2a) of the body (2) are provided at the front end outer periphery of the body (2). Chip mounting grooves (3) are provided at substantially equal intervals in the circumferential direction. These tip mounting grooves (3) are composed of a tip insertion portion (3A) into which the tip (10) and the holder (30) are inserted, and a wedge insertion portion (3B) into which the wedge member (20) is inserted. The As illustrated in FIG. 4, the holder (30) inserted into the chip insertion portion (3A) penetrates through two side surfaces (30c, 30d) facing the inner peripheral side and the outer peripheral side of the holder (30). It is being fixed by the screw member (40) inserted in the attachment hole (31) to do. Specifically, the head portion (41) of the screw member (40) has a larger diameter than the shaft portion (42) and has a flange shape, and the seat surface (41a) of the head portion (41) has the screw member (40). ) On a flat surface substantially perpendicular to the axis (CLn). The screw portion of the shaft portion (42) of the screw member (40) is screwed into the female screw hole (4) provided in the bottom surface (3Ab) facing the radial direction of the chip insertion portion (3A), and the head of the screw member (40) When a part of the seating surface (41a) of the portion (41) abuts and presses against the side surface (30d) facing the outer peripheral side of the holder (30), the holder (30) is rotated in the rotation direction (K). In a state where the lower surface (30b) facing rearward and the side surface (30c) facing radially inward are in contact with the wall surface (3Aa) and bottom surface (3Ab) facing the circumferential direction of the corresponding chip insertion portion (3A). It is fixed. A tip seat (32) into which the tip (10) is inserted and positioned is formed on the upper surface (30a) facing forward in the rotational direction (K) of the holder (30). The chip seat (32) includes a chip seating surface (33) that contacts the lower surface (10b) of the chip (10), and two side surfaces that rise upward from the chip seating surface (33) and are adjacent to the chip (10) ( 10c) are formed from positioning reference planes (34, 35) which respectively contact. Providing the tip seat (32) on a holder (30) separate from the body (2) is advantageous in terms of positioning accuracy of the tip (10). The chip (10) is directly inserted and positioned in the chip seat (32) provided on the wall surface (3Aa) facing the circumferential direction of the chip insertion portion (3A) of the chip mounting groove (3), or The chip seat (32) may be inserted and positioned via a simple flat plate-shaped holder (30) that functions as a chip seating surface (33). When the holder (30) is used, the screw member (40) may be attached to at least one of the holder (30) and the body (2).

楔部材(20)の内周側及び外周側を向く2つの側面(20c、20d)を貫通する左ねじの雌ねじ孔(21)が設けられている。この雌ねじ孔(21)に左右ねじ(50)の一端部の左ねじを螺合するとともに他端部の右ねじを楔部材挿入部(3B)の底面(3Bb)に設けられた雌ねじ孔(5)に螺合している。さらに、楔部材挿入部(3B)の周方向を向く壁面(3Ba)には、楔部材(20)の回転方向(K)前方を向く側面である基準面(20a)が当接し、楔部材(20)の基準面(20a)に対向する押圧面(20b)が保持具(30)のチップ座(32)に挿入されたチップ(10)の上面(10a)に当接し且つ基準面(20a)が楔挿入部(3B)の壁面(3Ba)に当接した状態で、左右ねじ(50)により楔挿入部(3B)の底面(3Bb)側へ引き込まれることによって、チップ(10)は保持具(30)に向かって押圧され固定される。 A left-handed female screw hole (21) penetrating through two side surfaces (20c, 20d) facing the inner peripheral side and the outer peripheral side of the wedge member (20) is provided. A female screw hole (5) provided on the bottom surface (3Bb) of the wedge member insertion portion (3B) and a right screw on one end of the other end portion is screwed into the female screw hole (21). ). Further, the reference surface (20a) which is the side surface facing the front in the rotation direction (K) of the wedge member (20) is in contact with the wall surface (3Ba) facing the circumferential direction of the wedge member insertion portion (3B), and the wedge member ( The pressing surface (20b) facing the reference surface (20a) of 20) is in contact with the upper surface (10a) of the chip (10) inserted into the chip seat (32) of the holder (30), and the reference surface (20a). Is brought into contact with the wall surface (3Ba) of the wedge insertion portion (3B) and is pulled into the bottom surface (3Bb) side of the wedge insertion portion (3B) by the left and right screws (50), whereby the tip (10) is held in place. It is pressed and fixed toward (30).

チップ(10)は、少なくとも切れ刃が超硬合金、サーメット、セラミックス、cBN又はダイヤモンド等の硬質材料から構成され四角形平板状に成形されたもので、選択的にすくい面とされる互いに平行な上面(10a)及び下面(10b)と、この上下面(10a、10b)に対して直角な側面(10c)からなる逃げ面(10c)とを有するネガチップである。上下面(10a、10b)と逃げ面(10c)との交差稜線部には、上面の角部に円弧状のコーナー刃(11)を挟んで4つの主切刃(12)が形成され、正面フライス(1)の外周側を向く主切れ刃(12)と、この主切れ刃(12)に連なって最も先端側に位置するコーナー刃(11)とにより被削材(図示しない)を切削する。なお、チップ(10)は、その主面形状が四角形状以外の多角形状であってもよく、逃げ面(10c)が上面(10a)に対して鋭角をなすポジチップであってもよい。また、図3に例示するように、コーナー刃(11)がさらい刃機能を有する少なくとも1つの直線又は少なくとも1つの曲線のいずれかからなる副切れ刃(11A)で代替されてもよい。 The chip (10) is formed of a hard material such as cemented carbide, cermet, ceramics, cBN or diamond at least with a cutting edge, and is formed into a rectangular flat plate shape. This is a negative chip having (10a) and a lower surface (10b) and a flank (10c) composed of side surfaces (10c) perpendicular to the upper and lower surfaces (10a, 10b). Four main cutting edges (12) are formed at the corners of the upper surface with the arc-shaped corner blades (11) sandwiched between the upper and lower surfaces (10a, 10b) and the flank (10c). A work material (not shown) is cut by a main cutting edge (12) facing the outer peripheral side of the milling cutter (1) and a corner cutting edge (11) located at the most distal end side of the main cutting edge (12). . The tip (10) may have a polygonal shape other than a square shape on the main surface, or a positive tip whose flank (10c) forms an acute angle with respect to the upper surface (10a). In addition, as illustrated in FIG. 3, the corner blade (11) may be replaced with a secondary cutting edge (11A) including at least one straight line or at least one curve having a wiping edge function.

次に、本実施の形態の特徴部分について説明する。図4に例示するように、保持具(30)をチップ取付け溝(3)のチップ挿入部(3A)に固定しているねじ部材(40)は、その頭部(41)の座面(41a)の一部がチップ着座面(33)を外周側に延ばした延長線よりも上方に突出するように装着されている。そして、前記座面(41a)の一部は、チップ(10)に作用する遠心力の方向(矢印C方向)と反対方向又は前記遠心力の方向と鋭角で交差する方向、別の表現をすれば前記遠心力の方向と対抗する方向に向けられて、チップ(10)の逃げ面(10c)の一部と係合可能に配置される。この係合可能とは、チップ(10)が前記遠心力の方向(矢印C方向)にわずかに移動したとき、前記座面(41a)の一部がチップ(10)の逃げ面(10c)の一部に当接することによりチップ(10)の前記遠心力の方向(矢印C方向)の移動を阻止可能なことであり、具体的には、図7の(a)に例示するように、前記座面(41a)がチップ(10)の逃げ面(10c)に対して遠心力の方向(矢印C方向)と対抗する方向に所定の間隔(D)をおいて配置されている。前記所定の間隔(D)とは、0mmよりも大きく且つ3mm以下、好ましくは2mm以下、より好ましくは1mm以下の間隔である。又は、図7の(b)に例示するように、前記座面(41a)の一部がチップ(10)の逃げ面(10d)の一部に対して遠心力の方向(矢印C方向)と対抗する方向又は前記遠心力の方向と鋭角で交差する方向に当接もしくは押圧する状態でもよい。本実施の形態では、ねじ部材(40)の座面(41a)とチップ(10)の主切れ刃の逃げ面(12a)とは、互いに前記所定の間隔をもって略平行に対向しているが、互いに鋭角に傾斜してもよい。ねじ部材(40)は被削材の切込み領域(ap)への干渉を防止するため前記切込み領域(ap)以外の位置に設けられる。ねじ部材(40)の頭部(41)の座面(41a)の一部を、切削に使用されないコーナー刃(11)の逃げ面(11a)あるいは図3に例示したように切削に使用されない副切れ刃(11A)の逃げ面(11Aa)に係合可能にした場合には、ねじ部材(40)の切込み領域(ap)への干渉をより確実に防止することができる。 Next, the characteristic part of this Embodiment is demonstrated. As illustrated in FIG. 4, the screw member (40) fixing the holder (30) to the chip insertion portion (3A) of the chip mounting groove (3) has a seating surface (41a) of the head (41). ) Is mounted so as to protrude upward from an extension line extending the chip seating surface (33) to the outer peripheral side. A part of the seating surface (41a) is expressed in a direction opposite to the direction of the centrifugal force acting on the tip (10) (direction of arrow C) or in a direction intersecting with the direction of the centrifugal force at an acute angle. For example, it is oriented in a direction opposite to the direction of the centrifugal force and is arranged to be able to engage with a part of the flank (10c) of the tip (10). This engagement is possible when the tip (10) slightly moves in the direction of the centrifugal force (direction of arrow C) so that a part of the seating surface (41a) is on the flank (10c) of the tip (10). It is possible to prevent movement of the tip (10) in the direction of the centrifugal force (direction of arrow C) by contacting a part. Specifically, as illustrated in FIG. The seating surface (41a) is arranged at a predetermined interval (D) in a direction opposite to the direction of centrifugal force (direction of arrow C) with respect to the flank (10c) of the tip (10). The predetermined interval (D) is an interval greater than 0 mm and 3 mm or less, preferably 2 mm or less, more preferably 1 mm or less. Alternatively, as illustrated in FIG. 7B, a part of the seat surface (41a) is in the direction of centrifugal force (direction of arrow C) with respect to a part of the flank (10d) of the tip (10). It may be in a state of abutting or pressing in an opposing direction or a direction intersecting with the direction of the centrifugal force at an acute angle. In the present embodiment, the seating surface (41a) of the screw member (40) and the flank (12a) of the main cutting edge of the tip (10) face each other substantially in parallel with the predetermined interval. You may incline mutually at an acute angle. The screw member (40) is provided at a position other than the cut area (ap) in order to prevent interference with the cut area (ap) of the work material. A part of the seating surface (41a) of the head (41) of the screw member (40) is used as a flank (11a) of the corner blade (11) not used for cutting, or as a secondary not used for cutting as illustrated in FIG. When engagement with the flank (11Aa) of the cutting edge (11A) is enabled, interference with the cutting region (ap) of the screw member (40) can be more reliably prevented.

ねじ部材(40)は、その頭部(41)にチップ(10)の逃げ面(10d)に係合可能な座面(41a)を有するものであればよく、図4〜図6にそれぞれ例示したように、六角穴付きボルト(JIS B 1176)、六角ボルト(JIS B 1180)、六角穴付きボタンボルト(JIS B 1174)等のJIS規格のボルトが挙げられる。 The screw member (40) only needs to have a seating surface (41a) engageable with the flank (10d) of the tip (10) on its head (41), which is illustrated in FIGS. 4 to 6 respectively. As described above, JIS standard bolts such as a hexagon socket head bolt (JIS B 1176), a hexagon head bolt (JIS B 1180), and a hexagon socket head button bolt (JIS B 1174) can be mentioned.

以上の構成を有する正面フライス(1)の作用について以下に説明する。例えばセラミックスからなるチップ(10)を楔部材(20)により保持具(30)のチップ座(32)に装着する。ボデー(2)を回転方向(K)に高速回転させて、チップ(10)により例えば鋳鉄等の被削材(図示しない)を切削する。この際、切削に関与する主切れ刃(12)及びコーナー刃(11)は、図2では正面フライス(1)の外周側を向く主切れ刃(12)及びこの主切れ刃(12)に連なってボデー(2)の先端面(2b)よりも先端側に突出するコーナー刃(11)である。チップ(10)には、ボデー(2)の外周側に飛び出そうとする遠心力が働くが、本実施の形態では、チップ着座面(33)を外周側に延ばした延長線の上方に突出するねじ部材(40)の頭部(41)の座面(41a)の一部が、前記チップ(10)に働く遠心力の方向(矢印C方向)と反対の方向又は前記遠心力の方向と鋭角で交差する方向に、前記チップ(10)の主切れ刃の逃げ面(12a)と所定の間隔をあけて配置されることによって係合可能であるか、又は、前記逃げ面(12a)の一部に当接もしくは押圧することによって前記チップ(10)の飛散を防止することができる。さらに、ねじ部材(40)は、チップ(10)の飛散を防止する機能に加え保持具(30)をボデー(2)に固定する機能を兼ね備えているため、保持具(30)の固定手段の簡略化及びコストの減少に有効である。 The operation of the face mill (1) having the above configuration will be described below. For example, a chip (10) made of ceramic is mounted on the chip seat (32) of the holder (30) by the wedge member (20). The body (2) is rotated at a high speed in the rotation direction (K), and a work material (not shown) such as cast iron is cut by the tip (10). At this time, the main cutting edge (12) and the corner cutting edge (11) involved in cutting are connected to the main cutting edge (12) and the main cutting edge (12) facing the outer peripheral side of the face mill (1) in FIG. The corner blade (11) protrudes further to the front end side than the front end surface (2b) of the body (2). The tip (10) has a centrifugal force that tends to jump out to the outer peripheral side of the body (2), but in this embodiment, the tip seating surface (33) protrudes above the extended line extending to the outer peripheral side. A part of the seating surface (41a) of the head (41) of the screw member (40) is in a direction opposite to the direction of the centrifugal force acting on the tip (10) (arrow C direction) or the direction of the centrifugal force and an acute angle. Can be engaged with each other by being arranged at a predetermined distance from the flank (12a) of the main cutting edge of the tip (10) in a direction intersecting with each other, or one of the flank (12a). The tip (10) can be prevented from being scattered by contacting or pressing the portion. Further, since the screw member (40) has a function of fixing the holding tool (30) to the body (2) in addition to a function of preventing the chip (10) from scattering, the fixing means of the holding tool (30) Effective for simplification and cost reduction.

本実施の形態の正面フライス(1)において、チップ(10)の取外しを行うには、左右ねじ(50)を緩めて楔部材(20)によるチップ(10)の押圧を解除する。続いて、楔部材(20)をその基準面(20a)が壁面(3Ba)に沿うように楔部材(20)の挿入方向と反対方向に移動させ、ここで、チップ(10)を図4中の矢印M方向へ移動させて保持具(30)から取り出す。チップ(10)を取付ける場合には、左右ねじ(50)の一端側の左ねじに楔部材(20)を螺合した状態で、他端部の右ねじをボデー(2)にねじ込む。ねじ部材(40)の頭部(41)の座面(41a)の一部によってチップ(10)の主切れ刃の逃げ面(12a)を押圧する場合には、当該ねじ部材(40)を緩め前記主切れ刃の逃げ面(12a)の押圧状態を解除したうえでチップ(10)の取付け及び取外しを行い、チップ(10)を楔部材(20)によりチップ座(32)に固定した後、当該ねじ部材(40)を締め込み前記主切れ刃の逃げ面(12a)を押圧した状態とする。 In order to remove the tip (10) in the face mill (1) of the present embodiment, the left and right screws (50) are loosened to release the pressing of the tip (10) by the wedge member (20). Subsequently, the wedge member (20) is moved in the direction opposite to the insertion direction of the wedge member (20) so that the reference surface (20a) is along the wall surface (3Ba). Here, the tip (10) is moved in FIG. And move it in the direction of arrow M to remove it from the holder (30). When attaching the chip (10), the right screw at the other end is screwed into the body (2) with the wedge member (20) screwed into the left screw at one end of the left and right screw (50). When the flank (12a) of the main cutting edge of the tip (10) is pressed by a part of the seating surface (41a) of the head (41) of the screw member (40), the screw member (40) is loosened. After releasing the pressing state of the flank (12a) of the main cutting edge, attaching and removing the tip (10), and fixing the tip (10) to the tip seat (32) by the wedge member (20), The screw member (40) is tightened and the flank (12a) of the main cutting edge is pressed.

本実施の形態では、図13に例示した従来正面フライス(S)のように、チップ着座面(31)に凸部(T)を形成することが不要になるため、ボデー(1)又はチップ着座面(31)を構成する部品のコスト高騰を防止でき、凸部(T)の破損や損傷に伴うボデー(1)又は部品交換によるランニングコストの高騰を防止できる。しかも、一般的に市販されているJIS規格のボルト又はねじ等をそのままねじ部材(40)として使用することができるので、ねじ部材(40)の供給が容易且つ低コストとなる。また、チップの飛散を防止するために図14に例示したような特殊形状のチップ(1)とすることが不要になることから、ISO規格のチップをそのまま使用することができる。さらに、ねじ部材(40)の頭部(41)の座面(41a)に係合するチップ(10)の逃げ面(10c)のチップ着座面(33)からの高さ寸法は、その最大値(H)が前記係合する部位におけるチップ(10)の逃げ面(10c)の全体の高さの5%〜100%の範囲に設定されるのが好ましい(図7の(a)参照)。これは、5%よりも小さいと所期のチップ飛散防止効果が得られないからであり、より好ましくは前記チップ(10)の逃げ面(10c)全体の高さの10%〜100%の範囲、特に好ましくは20%から100%の範囲に設定される。 In the present embodiment, it is not necessary to form the convex portion (T) on the chip seating surface (31) as in the conventional face mill (S) illustrated in FIG. It is possible to prevent an increase in cost of the parts constituting the surface (31), and it is possible to prevent an increase in running cost due to replacement of the body (1) or parts due to breakage or damage of the convex part (T). In addition, since commercially available JIS standard bolts or screws can be used as they are as the screw member (40), the screw member (40) can be supplied easily and at low cost. Further, since it is not necessary to use the specially shaped chip (1) as illustrated in FIG. 14 in order to prevent the chips from scattering, an ISO standard chip can be used as it is. Further, the height dimension of the flank (10c) of the tip (10) engaged with the seating surface (41a) of the head (41) of the screw member (40) from the tip seating surface (33) is the maximum value. (H) is preferably set in a range of 5% to 100% of the entire height of the flank (10c) of the tip (10) at the engaging portion (see FIG. 7 (a)). This is because if it is smaller than 5%, the expected chip scattering prevention effect cannot be obtained, and more preferably, the range of 10% to 100% of the entire height of the flank (10c) of the chip (10). Particularly preferably, it is set in the range of 20% to 100%.

本実施の形態における他の態様について以下に説明する。図8に例示するように、ねじ部材(40)の軸部(42)の周囲に装着した座金(60)を、頭部(41)の座面(41a)とチップ(10)の逃げ面(10c)との間に介装することによって、前記座金(60)の端面(60a)の一部を前記逃げ面(10c)に係合可能としてもよい。この場合、ねじ部材(40)の頭部(41)の座面(41a)は硬質材料からなるチップ(10)の逃げ面(10c)に直接当接することがないので、前記座面(41a)の損傷を抑制することができる。特にチップ(10)の逃げ面(10c)を座金(60)で積極的に押圧する場合には、前記座面(41a)の損傷を抑制する効果が非常に高くなる。なお、座金(60)は前記座面(41a)にろう付け、接着剤等によってねじ部材(40)と一体的に設けてもよい。前記座金(60)としては、平座金(JIS B 1256)、ばね座金、皿ばね座金、歯付き座金又は波形ばね座金(JIS B 1251)等の普通に市販している座金から選ばれるのが好ましい。 Other aspects in the present embodiment will be described below. As illustrated in FIG. 8, the washer (60) mounted around the shaft portion (42) of the screw member (40) is attached to the seating surface (41 a) of the head (41) and the flank ( 10c), a part of the end face (60a) of the washer (60) may be engageable with the flank (10c). In this case, the seating surface (41a) of the head (41) of the screw member (40) does not directly contact the flank (10c) of the tip (10) made of a hard material. Damage can be suppressed. In particular, when the flank (10c) of the tip (10) is positively pressed by the washer (60), the effect of suppressing damage to the seat (41a) becomes very high. Note that the washer (60) may be integrally provided with the screw member (40) by brazing, adhesive, or the like to the seat surface (41a). The washer (60) is preferably selected from commercially available washers such as a plain washer (JIS B 1256), a spring washer, a disc spring washer, a toothed washer or a wave spring washer (JIS B 1251). .

図9及び図10は本発明を適用した第2の実施形態例を説明するための、図1及び図2に相当する図であり、図11は要部拡大図である。この実施の形態は、チップ(10)に働く遠心力の方向(矢印C方向)と鋭角で交差する方向にチップ(10)の逃げ面(10c)と係合可能にねじ部材(40)が装着されている点で第1の実施の形態と同様であり、ねじ部材(40)以外に保持具(30)をボデー(2)に固定する固定手段(80)が備えられている点で相違する。すなわち、図9、図10及び図11に例示するように、チップ取付け溝(3)の楔部材挿入部(3B)には、チップ(10)の上面(10a)を押圧するチップ固定用楔部材(20)、及びこの楔部材(20)の後端側に位置し保持具(30)の上面(30a)を押圧する保持具の固定手段(80)としての保持具固定用楔部材(80)が挿入される。保持具固定用楔部材(80)は、チップ固定用楔部材(20)と同様に、内周側及び外周側を向く2つの側面(80c、80d)を貫通する左ねじの雌ねじ孔(81)が設けられている。この雌ねじ孔(81)に左右ねじ(90)の一端部の左ねじを螺合するとともに他端部の右ねじを楔部材挿入部(3B)の底面(3Bb)に設けられた雌ねじ孔(6)に螺合している。さらに、楔部材挿入部(3B)の周方向を向く壁面(3Ba)には、保持具固定用楔部材(80)の回転方向(K)前方を向く側面である基準面(80a)が当接し、この基準面(80a)に対向する押圧面(80b)が保持具(30)の上面(30a)に当接し且つ基準面(80a)が楔挿入部(3B)の壁面(3Ba)に当接した状態で、左右ねじ(90)により楔挿入部(3B)の底面(3Bb)側へ引き込まれることによって、保持具(30)はチップ挿入部(3A)の周方向を向く壁面(3Aa)及び底面(3Ab)に当接した状態で固定されている。 FIGS. 9 and 10 are views corresponding to FIGS. 1 and 2 for explaining a second embodiment to which the present invention is applied, and FIG. 11 is an enlarged view of a main part. In this embodiment, the screw member (40) is mounted so as to be able to engage with the flank (10c) of the tip (10) in a direction intersecting at an acute angle with the direction of the centrifugal force (arrow C direction) acting on the tip (10). It is the same as that of 1st Embodiment by the point currently performed, and is different by the point provided with the fixing means (80) which fixes a holder (30) to a body (2) other than a screw member (40). . That is, as illustrated in FIGS. 9, 10, and 11, a tip fixing wedge member that presses the upper surface (10 a) of the tip (10) is inserted into the wedge member insertion portion (3 </ b> B) of the tip mounting groove (3). (20), and a holding member fixing wedge member (80) as a fixing means (80) of the holding member that is located on the rear end side of the wedge member (20) and presses the upper surface (30a) of the holding member (30) Is inserted. Like the tip fixing wedge member (20), the holding fixture fixing wedge member (80) has a female screw hole (81) of a left-hand thread that penetrates two side surfaces (80c, 80d) facing the inner peripheral side and the outer peripheral side. Is provided. The left screw at one end of the left and right screw (90) is screwed into the female screw hole (81), and the right screw at the other end is screwed into the female screw hole (6B) provided on the bottom surface (3Bb) of the wedge member insertion portion (3B). ). Further, the reference surface (80a), which is a side surface facing the front in the rotational direction (K) of the holder fixing wedge member (80), abuts on the wall surface (3Ba) facing the circumferential direction of the wedge member insertion portion (3B). The pressing surface (80b) facing the reference surface (80a) contacts the upper surface (30a) of the holder (30), and the reference surface (80a) contacts the wall surface (3Ba) of the wedge insertion portion (3B). In this state, the holder (30) is pulled toward the bottom surface (3Bb) side of the wedge insertion portion (3B) by the left and right screws (90), so that the holder (30) faces the circumferential direction of the tip insertion portion (3A) and It is fixed in contact with the bottom surface (3Ab).

図11の要部拡大図に例示するように、保持具(30)の外周側及び内周側を向く2つの側面(30c、30d)を貫通する取付け孔(31)に挿通されたねじ部材(40)は、チップ挿入部(3A)の底面(3Ab)に設けられた雌ねじ孔(4)にねじ込まれており、当該ねじ部材(40)の頭部(41)の座面(41a)の一部が保持具(30)の外周側を向く側面(30d)に当接し押圧している。ねじ部材(40)の頭部(41)の座面(41a)の外周部の一部は、チップ着座面(33)を外周側に延ばした延長線よりも上方に突出するように装着され、チップ(10)に作用する遠心力の方向(矢印C方向)と対抗する方向にチップ(10)の主切れ刃の逃げ面(12a)の一部と係合可能に配置される。図11では、ねじ部材(40)として六角ボルト(JIS B 1180)が用いられているが、第1の実施の形態と同様に六角穴付きボルト(JIS B 1176)、六角穴付きボタンボルト(JIS B 1174)等のJIS規格のボルトが使用されてもよい。また、図12に例示するように、ねじ部材(40)の軸部(42)の周囲に平座金(JIS B 1256)、ばね座金、皿ばね座金、歯付き座金又は波形ばね座金(JIS B 1251)等のいずれかの座金(60)を装着し、この座金(60)を頭部(41)の座面(41a)とチップ(10)の逃げ面(10c)との間に介装することによって、前記座金(60)の端面(60a)の一部をチップ(10)の逃げ面(10c)に係合可能としてもよい。 As illustrated in the enlarged view of the main part of FIG. 11, a screw member inserted through a mounting hole (31) passing through two side surfaces (30c, 30d) facing the outer peripheral side and the inner peripheral side of the holder (30) ( 40) is screwed into the female screw hole (4) provided in the bottom surface (3Ab) of the chip insertion portion (3A), and is one of the seating surface (41a) of the head (41) of the screw member (40). The portion contacts and presses the side surface (30d) facing the outer peripheral side of the holder (30). A part of the outer peripheral portion of the seating surface (41a) of the head portion (41) of the screw member (40) is mounted so as to protrude upward from an extension line extending the tip seating surface (33) to the outer peripheral side, It arrange | positions so that engagement with a part of flank (12a) of the main cutting edge of a chip | tip (10) is the direction opposite to the direction (arrow C direction) of the centrifugal force which acts on a chip | tip (10). In FIG. 11, a hexagon bolt (JIS B 1180) is used as the screw member (40), but a hexagon socket head bolt (JIS B 1176) and a hexagon socket button bolt (JIS) are used as in the first embodiment. JIS standard bolts such as B 1174) may be used. Further, as illustrated in FIG. 12, a flat washer (JIS B 1256), a spring washer, a disc spring washer, a toothed washer or a corrugated spring washer (JIS B 1251) around the shaft portion (42) of the screw member (40). ) Or the like, and this washer (60) is interposed between the seating surface (41a) of the head (41) and the flank (10c) of the tip (10). Thus, a part of the end surface (60a) of the washer (60) may be engageable with the flank (10c) of the tip (10).

また、図12に例示するように、保持具(30)を固定する固定手段(80)を六角穴付きボルト等の締付けねじ(80)で代替してもよい。すなわち、保持具(30)のチップ座(32)の着座面(33)に設けたざぐり穴(36)に挿通された締付けねじ(80)を、チップ挿入部(3A)の周方向を向く壁面(3Aa)に設けた雌ねじ孔(7)にねじ込むことによって、締付けねじ(80)の頭部の座面がざぐり穴(36)の底面を前記壁面(3Aa)側に押圧し、保持具(30)はチップ挿入部(3A)内の所定の位置に固定される。 Further, as illustrated in FIG. 12, the fixing means (80) for fixing the holder (30) may be replaced with a tightening screw (80) such as a hexagon socket bolt. That is, the fastening screw (80) inserted through the counterbore (36) provided in the seating surface (33) of the tip seat (32) of the holder (30) is connected to the wall surface facing the circumferential direction of the tip insertion portion (3A). By screwing into the female screw hole (7) provided in (3Aa), the seating surface of the head of the tightening screw (80) presses the bottom surface of the counterbore (36) toward the wall surface (3Aa), and the holder (30 ) Is fixed at a predetermined position in the chip insertion portion (3A).

以上の構成を有する第2の実施の形態においては、ねじ部材(40)は第1の実施の形態と同様にチップ(10)の飛散を防止する機能に加え、保持具固定用楔部材(80)又は締付けねじ(80)等の固定手段(80)とともに保持具(30)をボデー(2)に強固且つ確実に固定する機能を有する。また、これら固定手段(80)によって常に押圧される保持具(30)は取付け位置精度が正確に維持されるため、チップ(10)の位置決め精度が良好となる。保持具(30)が固定手段(80)によって十分強力に固定されていれば、ねじ部材(40)は保持具(30)を押圧し固定することが不要であり、単にねじ部材(40)は、頭部(41)の座面(41a)の一部又はねじ部材(40)に装着された座金(60)の端面(60a)の一部をチップ(10)の逃げ面(10c)に係合可能に装着されていればよい。ねじ部材(40)の頭部(41)の座面(41a)の一部がチップ(10)の逃げ面(10c)を押圧するようにした場合には、チップ(10)の飛散を防止する効果及びチップ(10)のクランプ力を高める効果の双方がいっそう高くなる。 In the second embodiment having the above-described configuration, the screw member (40) has a function of preventing the tip (10) from being scattered, as in the first embodiment, and a wedge fixing member (80) ) Or fixing means (80) such as a tightening screw (80) and the like, and a function of firmly and reliably fixing the holder (30) to the body (2). In addition, since the mounting position accuracy of the holder (30) that is always pressed by the fixing means (80) is accurately maintained, the positioning accuracy of the chip (10) is improved. If the holder (30) is fixed sufficiently strongly by the fixing means (80), the screw member (40) does not need to press and fix the holder (30), and the screw member (40) is simply Part of the seating surface (41a) of the head (41) or part of the end surface (60a) of the washer (60) mounted on the screw member (40) is related to the flank (10c) of the tip (10). It is only necessary to be able to be fitted. When a part of the seating surface (41a) of the head (41) of the screw member (40) presses the flank (10c) of the tip (10), scattering of the tip (10) is prevented. Both the effect and the effect of increasing the clamping force of the tip (10) are further increased.

本実施の形態の正面フライス(1)において、ねじ部材(40)の頭部(41)の座面(41a)とチップ(10)の主切れ刃の逃げ面(12a)との間に所定の間隔をあけて係合可能とした場合、チップ(10)の取外しを行うには、左右ねじ(50)を緩めて楔部材(20)によるチップ(10)の押圧を解除する。続いて、楔部材(20)をその基準面(20a)が壁面(3Ba)に沿うように楔部材(20)の挿入方向と反対方向に移動させ、ここで、チップ(10)を図11中の矢印M方向へ移動させて保持具(30)から取り出す。チップ(10)を取付ける場合には、左右ねじ(50)の一端側の左ねじに楔部材(20)を螺合した状態で、他端部の右ねじをボデー(2)にねじ込む。ねじ部材(40)の頭部(41)の座面(41a)の一部によってチップ(10)の主切れ刃の逃げ面(12a)を押圧する場合には、当該ねじ部材(40)を緩め前記主切れ刃の逃げ面(12a)の押圧状態を解除したうえでチップ(10)の取付け及び取外しを行い、チップ(10)を楔部材(20)によりチップ座(32)に固定した後、当該ねじ部材(40)を締め込み前記主切れ刃の逃げ面(12a)を押圧した状態とする。 In the face mill (1) of the present embodiment, a predetermined gap is provided between the seating surface (41a) of the head (41) of the screw member (40) and the flank (12a) of the main cutting edge of the tip (10). When it is possible to engage with an interval, in order to remove the tip (10), the left and right screws (50) are loosened to release the pressing of the tip (10) by the wedge member (20). Subsequently, the wedge member (20) is moved in the direction opposite to the insertion direction of the wedge member (20) so that the reference surface (20a) is along the wall surface (3Ba). Here, the tip (10) is moved in FIG. And move it in the direction of arrow M to remove it from the holder (30). When attaching the chip (10), the right screw at the other end is screwed into the body (2) with the wedge member (20) screwed into the left screw at one end of the left and right screw (50). When the flank (12a) of the main cutting edge of the tip (10) is pressed by a part of the seating surface (41a) of the head (41) of the screw member (40), the screw member (40) is loosened. After releasing the pressing state of the flank (12a) of the main cutting edge, attaching and removing the tip (10), and fixing the tip (10) to the tip seat (32) by the wedge member (20), The screw member (40) is tightened and the flank (12a) of the main cutting edge is pressed.

本発明は正面フライスに限らず、エンドミル等にも本発明を適用できる。また、以上に述べた実施の形態に限定されることなく、本発明の要旨を逸脱しない範囲内において種々の変更及び追加が可能である。 The present invention is not limited to face milling but can be applied to end mills and the like. The present invention is not limited to the embodiment described above, and various modifications and additions can be made without departing from the scope of the present invention.

本発明を適用した第1の実施の形態である正面フライスを先端側から見た図である。It is the figure which looked at the face mill which is the 1st embodiment to which the present invention is applied from the tip side. 図1に示す正面フライスの左側面図であるIt is a left view of the front milling machine shown in FIG. 第1の実施の形態の他の形態の左側面図である。It is a left view of the other form of 1st Embodiment. 図1に示す正面フライスの要部拡大図である。It is a principal part enlarged view of the face mill shown in FIG. 第1の実施の形態の他の形態の要部拡大図である。It is a principal part enlarged view of the other form of 1st Embodiment. 第1の実施の形態のさらに他の形態の要部拡大図である。It is a principal part enlarged view of further another form of 1st Embodiment. 図1に示す正面フライスの要部拡大図である。It is a principal part enlarged view of the face mill shown in FIG. 第1の実施の形態のさらに他の形態の要部拡大図である。It is a principal part enlarged view of further another form of 1st Embodiment. 本発明を適用した第2の実施の形態である正面フライスを先端側から見た図である。It is the figure which looked at the face mill which is 2nd Embodiment to which this invention is applied from the front end side. 図9に示す正面フライスの左側面図である。FIG. 10 is a left side view of the face mill shown in FIG. 9. 図9に示す正面フライスの要部拡大図である。It is a principal part enlarged view of the face mill shown in FIG. 第2の実施の形態の他の形態の要部拡大図である。It is a principal part enlarged view of the other form of 2nd Embodiment. 従来の正面フライスを説明する図である。It is a figure explaining the conventional face mill. 他の従来の正面フライスを説明する図である。It is a figure explaining other conventional face milling.

符号の説明Explanation of symbols

1 正面フライス
2 ボデー
2a ボデーの外周面
2b ボデーの先端面
3 チップ取付け溝
4、5、6、7 雌ねじ孔
3A チップ挿入部
3B 楔挿入部
10 チップ
10a チップの上面
10b チップの下面
10c チップの逃げ面
11 コーナー刃
11a コーナー刃の逃げ面
11A 副切れ刃
11Aa 副切れ刃の逃げ面
12 主切れ刃
12a 主切れ刃の逃げ面
20 楔部材
20a 基準面
20b 押圧面
30 保持具
32 チップ座
33 チップ着座面
40 ねじ部材
41 頭部
41a 座面
50 左右ねじ
60 座金
80 固定手段(保持具固定用楔部材、締付けねじ)
90 左右ねじ
DESCRIPTION OF SYMBOLS 1 Front mill 2 Body 2a Body outer peripheral surface 2b Body front end surface 3 Tip mounting groove 4, 5, 6, 7 Female threaded hole 3A Tip insertion portion 3B Wedge insertion portion 10 Tip 10a Tip upper surface 10b Tip lower surface 10c Tip escape Surface 11 Corner blade 11a Relief surface of corner blade 11A Sub-cutting blade 11Aa Relief surface of sub-cutting blade 12 Main cutting edge 12a Relief surface of main cutting edge 20 Wedge member 20a Reference surface 20b Pressing surface 30 Holding tool 32 Chip seat 33 Chip seating Surface 40 Screw member 41 Head 41a Seat surface 50 Left and right screw 60 Washer 80 Fixing means (wedge member for fixing fixture, tightening screw)
90 left and right screws

Claims (6)

ボデーに設けたチップ取付け溝にチップを挿入し、前記チップ取付け溝の周方向を向く2つの壁面のうちの一方の壁面と前記チップとの間に挿入する楔部材によって、前記チップを他方の壁面に形成したチップ着座面に押圧し固定するスローアウェイ式転削工具において、
前記ボデーに着脱可能に装着したねじ部材の頭部の座面の一部が、前記チップに作用する遠心力の方向と反対の方向又は前記遠心力の方向と鋭角で交差する方向に、前記チップの逃げ面の一部に対して所定の間隔をあけて配置されることによって係合可能であるか、又は、前記逃げ面の一部に対して当接もしくは押圧することを特徴とするスローアウェイ式転削工具。
A chip is inserted into a chip mounting groove provided on the body, and the chip is inserted into the other wall surface by a wedge member inserted between one of the two wall surfaces facing the circumferential direction of the chip mounting groove and the chip. In the throw-away type rolling tool that presses and fixes to the chip seating surface formed in
A part of the seat surface of the head of the screw member detachably attached to the body is in a direction opposite to the direction of the centrifugal force acting on the chip or in a direction intersecting with the direction of the centrifugal force at an acute angle. It is possible to engage with a part of the flank of the flank by being arranged at a predetermined interval, or to contact or press against a part of the flank Type rolling tool.
ボデーに設けたチップ取付け溝にチップを挿入し、前記チップ取付け溝の周方向を向く2つの壁面のうちの一方の壁面と前記チップとの間に保持具を挿入し、他方の壁面と前記チップとの間に挿入する楔部材によって、前記チップを前記保持具の上面に形成したチップ着座面に押圧し固定するスローアウェイ式転削工具において、
前記保持具又は前記ボデーのいずれか一方に着脱可能に装着したねじ部材の頭部の座面の一部が、前記チップに作用する遠心力の方向と反対の方向又は前記遠心力の方向と鋭角で交差する方向に、前記チップの逃げ面の一部に対して所定の間隔をあけて配置されることによって係合可能であるか、又は、前記逃げ面の一部に対して当接もしくは押圧することを特徴とするスローアウェイ式転削工具。
A chip is inserted into a chip mounting groove provided on the body, a holder is inserted between one of the two wall surfaces facing the circumferential direction of the chip mounting groove and the chip, and the other wall surface and the chip are inserted. In a throw-away type rolling tool for pressing and fixing the tip against the tip seating surface formed on the upper surface of the holder by a wedge member inserted between
A part of the seating surface of the head of the screw member detachably attached to either the holder or the body is in a direction opposite to the direction of the centrifugal force acting on the chip or an acute angle with the direction of the centrifugal force. Can be engaged with each other by being arranged at a predetermined interval with respect to a part of the flank of the chip in a direction intersecting with, or abut or press against a part of the flank A throw-away type rolling tool characterized by
前記ねじ部材の頭部の座面の一部が前記保持具を押圧し前記ボデーに固定することを特徴とする請求項2に記載のスローアウェイ式転削工具。 The throw-away type rolling tool according to claim 2, wherein a part of a seating surface of a head part of the screw member presses the holding tool and fixes the holding tool to the body. 前記ねじ部材の頭部の座面の一部が前記チップの主切れ刃の逃げ面の一部に係合可能であることを特徴とする請求項1〜3のいずれか1項に記載のスローアウェイ式転削工具。 The throw according to any one of claims 1 to 3, wherein a part of the seating surface of the head of the screw member is engageable with a part of the flank of the main cutting edge of the tip. Away type turning tool. 前記ねじ部材の頭部の座面の一部が前記チップの切削に使用されない副切れ刃又はコーナー刃のいずれか一方の逃げ面の一部に係合可能であることを特徴とする請求項1〜3のいずれか1項に記載のスローアウェイ式転削工具。 2. A part of a seating surface of a head portion of the screw member can be engaged with a part of a flank of one of a secondary cutting edge and a corner cutting edge not used for cutting the tip. The throw-away type rolling tool according to any one of -3. 前記ねじ部材の頭部の座面と前記チップの逃げ面との間に座金を介装することを特徴とする請求項1〜5のいずれか1項に記載のスローアウェイ式転削工具。



The throw-away type rolling tool according to any one of claims 1 to 5, wherein a washer is interposed between a seating surface of a head portion of the screw member and a flank surface of the chip.



JP2005015252A 2005-01-24 2005-01-24 Throw-away turning tool Pending JP2006198749A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2219809A1 (en) * 2007-11-14 2010-08-25 Seco Tools AB Cutting tool and insert for cutting tool
JP2012510374A (en) * 2008-11-30 2012-05-10 イスカーリミテッド Cutting tool clamp mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10151514A (en) * 1996-11-25 1998-06-09 Toshiba Tungaloy Co Ltd Cutter for high speed cutting and tip
JP2002113609A (en) * 2000-10-10 2002-04-16 Sumitomo Electric Ind Ltd Rotary cutting tool and throwaway tip
JP2003011015A (en) * 2001-06-29 2003-01-15 Mitsubishi Materials Corp Throwaway type face milling cutter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10151514A (en) * 1996-11-25 1998-06-09 Toshiba Tungaloy Co Ltd Cutter for high speed cutting and tip
JP2002113609A (en) * 2000-10-10 2002-04-16 Sumitomo Electric Ind Ltd Rotary cutting tool and throwaway tip
JP2003011015A (en) * 2001-06-29 2003-01-15 Mitsubishi Materials Corp Throwaway type face milling cutter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2219809A1 (en) * 2007-11-14 2010-08-25 Seco Tools AB Cutting tool and insert for cutting tool
EP2219809A4 (en) * 2007-11-14 2012-02-15 Seco Tools Ab Cutting tool and insert for cutting tool
JP2012510374A (en) * 2008-11-30 2012-05-10 イスカーリミテッド Cutting tool clamp mechanism

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