JP2008023643A - Clamp auxiliary member and throw-away cutting tool with clamp auxiliary member - Google Patents

Clamp auxiliary member and throw-away cutting tool with clamp auxiliary member Download PDF

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JP2008023643A
JP2008023643A JP2006198079A JP2006198079A JP2008023643A JP 2008023643 A JP2008023643 A JP 2008023643A JP 2006198079 A JP2006198079 A JP 2006198079A JP 2006198079 A JP2006198079 A JP 2006198079A JP 2008023643 A JP2008023643 A JP 2008023643A
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throw
away
head
tip
auxiliary member
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Shiro Yoshioka
史郎 吉岡
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Tungaloy Corp
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Tungaloy Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To improve operability and work efficiency when replacing a cutting edge of a throw-away chip and the chip in a screw-on type throw-away cutting tool. <P>SOLUTION: This clamp auxiliary member used when attaching a throw-away chip to the throw-away cutting tool is composed of an approximately cylindrical body 10, an inside diameter screw 11 formed on the internal circumferential face of the body 10 and screwed with a fastening screw 200, a head 13 abutting on a mounting hole 30 penetratingly formed at the throw-away chip 300 by the screwing of the inside diameter screw 11 with the fastening screw 200, formed at one end of the body 10 and having notches 14, and an outside diameter screw 12 formed around the outer circumferential face of the body 10 at the opposite side of the head 13 and screwed into a screw hole formed at a chip mounting seat of the throw-away cutting tool. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、スローアウェイチップが工具本体に着脱可能に装着されてなるスローアウェイ式切削工具に用いるクランプ補助部材、およびそのクランプ補助部材を備えたスローアウェイ式切削工具に関し、特に、工具本体にスローアウェイチップがねじで固着されてなるスクリューオン方式のスローアウェイ式切削工具において、チップの取り付けに用いるクランプ補助部材、およびそのクランプ補助部材を介してスローアウェイチップが装着されてなるスローアウェイ式切削工具に関する。   The present invention relates to a clamp auxiliary member used in a throw-away cutting tool in which a throw-away tip is detachably attached to a tool body, and a throw-away cutting tool including the clamp auxiliary member, and more particularly, to a throw-away cutting tool. In a screw-on type throw-away cutting tool in which an away tip is fixed with a screw, a clamp auxiliary member used for attaching the tip, and a throw-away cutting tool in which the throw-away tip is attached via the clamp auxiliary member About.

スローアウェイ式切削工具に用いられるスローアウェイチップのクランプ方式として、締付ねじをスローアウェイチップに設けられた取付穴を介して、工具本体のチップ取付座の底面に穿設されたねじ穴に螺入することにより、スローアウェイチップを工具本体に固定するスクリューオン方式がある。
このスクリューオン方式によれば、ねじ１個でスローアウェイチップを工具本体に取り付けるため構造が簡単で、安価に製造することができるとともに工具管理も容易であり、特に、設計的にもコンパクトであることから、スローアウェイチップチップを取り付けるためのスペースが限定されるスローアウェイ式切削工具において多く採用されている。
その反面、このようなスクリューオン方式を採用するスローアウェイ式切削工具は、切れ刃の交換やチップの取替えに際し、締付ねじを完全にチップ取付座のねじ穴から外さなければならず、操作が煩雑で不便であった。そのため、刃数が多いフライス等にあっては、切れ刃の交換やチップの取替えに長時間を要することになり作業効率が悪かった。また、小径の工具の場合には小さな締付ねじを用いるため、締付ねじを工具本体から取り外した際に作業者がねじを落とし紛失することも多々あった。このようなスローアウェイ式切削工具においては、切れ刃の交換やチップの取替えのため締付ねじの着脱が頻繁に行われることから、操作性および作業効率の改善が強く望まれていた。
この問題を解決するために、締付ねじを完全に工具本体から取り外すことなくスローアウェイチップの切れ刃の交換を行うことができるスローアウェイ式切削工具が提案されている（例えば、特許文献１参照）。
特開２００１−２４６５１６号公報 As a clamping method of a throw-away tip used in a throw-away type cutting tool, a tightening screw is screwed into a screw hole drilled in a bottom surface of a tip mounting seat of a tool body through a mounting hole provided in the throw-away tip. There is a screw-on method for fixing the throw-away tip to the tool body by entering.
According to this screw-on method, since the throw-away tip is attached to the tool body with a single screw, the structure is simple, it can be manufactured at low cost, the tool management is easy, and the design is particularly compact. For this reason, it is often used in a throw-away type cutting tool in which a space for attaching a throw-away tip is limited.
On the other hand, throw-away type cutting tools that employ such a screw-on method must completely remove the tightening screw from the screw hole of the chip mounting seat when replacing the cutting edge or replacing the chip. It was complicated and inconvenient. Therefore, in the case of a milling machine having a large number of blades, it takes a long time to replace the cutting blade and replace the chip, resulting in poor working efficiency. In addition, since a small tightening screw is used in the case of a small-diameter tool, an operator often drops and loses the screw when the tightening screw is removed from the tool body. In such a throw-away type cutting tool, since the fastening screw is frequently attached and detached for exchanging the cutting edge and replacing the tip, improvement in operability and work efficiency has been strongly desired.
In order to solve this problem, a throw-away cutting tool has been proposed that can replace the cutting edge of the throw-away tip without completely removing the fastening screw from the tool body (see, for example, Patent Document 1). ).
JP 2001-246516 A

しかしながら、上記特許文献１の発明では、締結ねじがチップ取付座に螺合されている状態でこの締結ねじを挿通したスローアウェイチップをチップ取付座から外れた位置で回転させることにより切刃の交換を行うことができるが、チップの取替えを行うに際しては、依然として締結ねじを完全に工具本体から取り外さなければならなかった。
また、締結ねじの螺合を緩めた状態でチップ取付座から外したチップをチップポケットに干渉しないで回転可能にするため、固着状態のチップの上方のポケット側壁に盗み部を設けているので、工具剛性に劣り、製造工程が増えてしまう等の問題があった。
さらに、その盗み部に切屑等が付着した状態のままチップを回転させると未使用切刃を損傷する恐れがある。また、スローアウェイチップを締結ねじの頭部に当接する程度まで引き上げた状態で切刃の交換を行うため、その際にスローアウェイチップとチップ取付座の間に切屑等が入り込んで挟まれる恐れがある。そのため、切刃の交換に際してはあらかじめ盗み部およびチップ取付座周辺をエアー等でクリーニングする必要が生じ、作業が煩雑になるという問題もあった。 However, in the invention of Patent Document 1 described above, the cutting blade is replaced by rotating the throw-away tip inserted through the fastening screw in a state where the fastening screw is screwed into the tip mounting seat at a position away from the tip mounting seat. However, when the insert was replaced, the fastening screw still had to be completely removed from the tool body.
Also, in order to allow the chip removed from the chip mounting seat in the loosened state of the fastening screw to be rotated without interfering with the chip pocket, a stealing portion is provided on the pocket side wall above the fixed chip, There were problems such as inferior tool rigidity and increased manufacturing processes.
Furthermore, if the tip is rotated with chips and the like attached to the stealing portion, there is a risk of damaging unused cutting edges. In addition, since the cutting blade is replaced with the throw-away tip pulled up to the point where it comes into contact with the head of the fastening screw, there is a risk that chips or the like may get caught between the throw-away tip and the tip mounting seat. is there. Therefore, when replacing the cutting blade, it is necessary to clean the stealing portion and the periphery of the chip mounting seat with air or the like in advance, and there is a problem that the operation becomes complicated.

本発明は、上記問題を解決するためになされたもので、締付ねじを完全にスローアウェイ式切削工具本体から取り外すことなく、簡単かつ容易にスローアウェイチップの切れ刃の交換およびチップの取替えを行うことを可能とするクランプ補助部材、およびチップ着脱時等の操作性および作業効率の優れたスローアウェイ式切削工具を提供することを目的とする。   The present invention has been made to solve the above-described problems, and it is possible to easily and easily replace the throw-away tip and replace the tip without completely removing the clamping screw from the throw-away cutting tool body. It is an object of the present invention to provide a clamp auxiliary member that can be performed, and a throw-away type cutting tool that is excellent in operability and work efficiency when a chip is attached and detached.

上記課題を解決するために、本発明のクランプ補助部材およびそのクランプ補助部材を備えたスローアウェイ式切削工具は以下の手段を採用する。
請求項１に記載の発明は、スローアウェイ式切削工具へのスローアウェイチップの取り付けに用いるクランプ補助部材であって、略円筒状の本体と、この本体の内周面に形成される締付ねじに螺合する内径ねじ部と、この内径ねじ部と締付ねじが螺合することによりスローアウェイチップに貫通形成された取付穴に当接される本体の一端に形成される切欠部を有する頭部と、この頭部と反対側における本体の外周面に形成されスローアウェイ式切削工具のチップ取付座に穿設されたねじ穴に螺合する外径ねじ部とを有することを特徴とする。 In order to solve the above problems, the clamp auxiliary member of the present invention and the throw-away cutting tool including the clamp auxiliary member employ the following means.
The invention according to claim 1 is a clamp auxiliary member used for attaching a throw-away tip to a throw-away type cutting tool, and a substantially cylindrical main body and a fastening screw formed on an inner peripheral surface of the main body A head having a notched portion formed at one end of a main body that is brought into contact with an attachment hole formed through the throw-away tip by screwing the inner diameter screw portion and the tightening screw. And an outer diameter threaded portion that is formed on the outer peripheral surface of the main body on the side opposite to the head and is screwed into a screw hole formed in a tip mounting seat of a throw-away type cutting tool.

本発明に係るクランプ補助部材をスローアウェイ式切削工具へのスローアウェイチップの取り付けに用いれば、クランプ補助部材を介してスローアウェイチップの取付穴に挿通された締付ねじを、チップ取付座のねじ穴に螺合されたクランプ補助部材の内径ねじ部に螺入することにより、締付ねじの頭部がクランプ補助部材の頭部の内周面に押し当てられ、切欠部を有するクランプ補助部材の頭部がスローアウェイチップの取付穴に弾性的に当接されて、スローアウェイチップが工具本体に固定されることになる。
一方、スローアウェイチップを工具本体から取り外す場合においては、締付ねじと内径ねじ部との螺合を緩めて、締付ねじの頭部をクランプ補助部材の頭部の内周面から離隔し、クランプ補助部材の頭部をスローアウェイチップの取付穴への拘束から解放した後、チップ取付座への拘束から解放されたスローアウェイチップをチップ取付座から引き抜くことにより、工具本体からスローアウェイチップを取り外すことになる。
したがって、締付ねじを完全に工具本体から取り外すことなく、締付ねじとクランプ補助部材の内径ねじ部との螺合を緩めた状態で、簡単かつ容易に切れ刃の交換およびチップの取替えを行うことができる。そのため、刃数が多いフライス等であっても短時間で切れ刃の交換およびチップの取替え作業を行うことができ、また、ある程度螺合状態が確保されていることから、作業者がねじを落とし紛失することもなく、チップ着脱時の操作性および作業効率が向上する。 When the clamp auxiliary member according to the present invention is used for attaching the throw-away tip to the throw-away cutting tool, the clamping screw inserted into the attachment hole of the throw-away tip via the clamp auxiliary member is used as the screw for the tip mounting seat. By screwing into the inner diameter threaded portion of the clamp auxiliary member screwed into the hole, the head of the clamping screw is pressed against the inner peripheral surface of the head of the clamp auxiliary member, and the clamp auxiliary member having the notch portion The head is elastically brought into contact with the attachment hole of the throw-away tip, and the throw-away tip is fixed to the tool body.
On the other hand, when removing the throw-away tip from the tool body, loosen the screwing of the tightening screw and the inner diameter threaded portion, the head of the tightening screw is separated from the inner peripheral surface of the head of the clamp auxiliary member, After releasing the head of the clamp auxiliary member from the restraint to the mounting hole of the throw-away tip, the throw-away tip released from the restraint to the tip mounting seat is pulled out of the tip mounting seat, so that the throw-away tip is removed from the tool body. Will be removed.
Therefore, it is possible to easily and easily replace the cutting edge and replace the tip without loosely removing the clamping screw from the tool body and loosening the engagement between the clamping screw and the inner diameter threaded portion of the clamping auxiliary member. be able to. For this reason, even with a milling machine with a large number of blades, the cutting blade can be replaced and the tip can be replaced in a short period of time. The operability and work efficiency at the time of chip attachment / detachment are improved without being lost.

請求項２に記載の発明は、請求項１のクランプ補助部材において、その頭部の内周面における最小内径が、締付ねじを内径ねじ部に螺入しない状態で、前記締付ねじの頭部の外径よりも小さいことを特徴とする。   According to a second aspect of the present invention, in the clamping auxiliary member according to the first aspect, the minimum inner diameter of the inner peripheral surface of the head is such that the tightening screw is not screwed into the inner diameter screw portion, and the head of the tightening screw is It is characterized by being smaller than the outer diameter of the part.

本発明によれば、締付ねじの頭部の外径がクランプ補助部材の頭部の内周面における最小内径よりも大きいことから、締付ねじをクランプ補助部材の内径ねじ部に螺入することにより、切欠部を有するクランプ補助部材の頭部が締付ねじの頭部によってその内周面側から外周面側に向かって押圧されて半径拡大方向に弾性変形する。
したがって、本発明に係るクランプ補助部材をスローアウェイ式切削工具のチップ取付座に固着した後に、このクランプ補助部材の頭部をスローアウェイチップの取付穴に嵌挿させるとともに、その内径ねじ部に締付ねじを螺入することにより、切欠部を有するクランプ補助部材の頭部が半径拡大方向に弾性変形することでスローアウェイチップの取付穴に当接されて、スローアウェイチップをチップ取付座に取り付けることができる。
また、この締付ねじと内径ねじ部との螺合を緩めることにより、締付ねじの頭部がクランプ補助部材の頭部の内周面から離隔され、半径拡大方向に弾性変形していたクランプ補助部材の頭部の形状が元の状態に戻って取付穴への拘束から解放されるため、スローアウェイチップはチップ取付座への拘束から解放されることから、このスローアウェイチップを引き抜くことで、チップ取付座から取り外すことができる。
そのため、締付ねじを完全に工具本体から取り外すことなく、締付ねじとクランプ補助部材の内径ねじ部との螺合状態をある程度確保したままで、チップの着脱を行うことができるので、簡単かつ容易に切れ刃の交換およびチップの取替えを行うことができ、刃数が多いフライス等であっても短時間で切れ刃の交換およびチップの取替え作業を行うことが可能である。また、チップ着脱時であっても締付ねじは工具本体にある程度螺合されていることから、作業者がねじを落とし紛失することもない。よって、チップ着脱時の操作性および作業効率の向上を図ることができる。 According to the present invention, since the outer diameter of the head of the tightening screw is larger than the minimum inner diameter of the inner peripheral surface of the head of the clamp auxiliary member, the tightening screw is screwed into the inner diameter screw portion of the clamp auxiliary member. Thus, the head of the clamp auxiliary member having the notch is pressed from the inner peripheral surface side toward the outer peripheral surface side by the head portion of the tightening screw, and is elastically deformed in the radial expansion direction.
Therefore, after fixing the clamp auxiliary member according to the present invention to the tip mounting seat of the throw-away cutting tool, the head of the clamp auxiliary member is inserted into the mounting hole of the throw-away tip and tightened to the inner diameter threaded portion. By screwing in the attached screw, the head of the clamp auxiliary member having the notch is elastically deformed in the radial expansion direction so that it comes into contact with the mounting hole of the throw-away tip and attaches the throw-away tip to the tip mounting seat. be able to.
In addition, by loosening the screwing of the tightening screw and the inner diameter threaded portion, the head of the tightening screw is separated from the inner peripheral surface of the head of the clamp auxiliary member, and the clamp has been elastically deformed in the radial expansion direction. Since the shape of the head of the auxiliary member returns to its original state and is released from restraint on the mounting hole, the throwaway tip is released from restraint on the tip mounting seat. It can be removed from the chip mounting seat.
For this reason, the chip can be attached and detached easily while securing the screwed state between the tightening screw and the inner diameter threaded portion of the auxiliary clamp member without completely removing the tightening screw from the tool body. The cutting blade can be easily replaced and the tip can be replaced. Even with a milling machine having a large number of blades, the cutting blade can be replaced and the tip can be replaced in a short time. Further, even when the chip is attached or detached, the tightening screw is screwed to the tool body to some extent, so that the operator does not drop the screw and lose it. Therefore, it is possible to improve the operability and work efficiency when attaching and detaching the chip.

請求項３に記載の発明は、請求項１または２のクランプ補助部材において、その頭部の外径が、取付穴の少なくとも一部分における内径よりも大きいことを特徴とする。   According to a third aspect of the present invention, in the clamp auxiliary member of the first or second aspect, the outer diameter of the head is larger than the inner diameter of at least a part of the mounting hole.

本発明によれば、クランプ補助部材の頭部の外径がスローアウェイチップの取付穴の内径よりも大きい部分があることから、あらかじめチップ取付座のねじ穴に螺合されたクランプ補助部材の頭部に、スローアウェイチップの取付穴を押し込んで嵌入することにより、スローアウェイチップがチップ取付座に仮止めされることになる。
したがって、締付ねじをクランプ補助部材の内径ねじ部に螺入する際にスローアウェイチップを手で押さえる必要がないことから、締付ねじを締め込み易く、締付ねじ着脱時の操作性に優れる。
また、スローアウェイチップがチップ取付座に仮止めされず移動可能な状態にあっても、スローアウェイチップの取付穴からクランプ補助部材の頭部が嵌脱しない程度に係止されることになるから、スローアウェイチップの落下および紛失を防止することができる。 According to the present invention, since the outer diameter of the head of the clamp auxiliary member is larger than the inner diameter of the attachment hole of the throw-away tip, the head of the clamp auxiliary member screwed into the screw hole of the tip mounting seat in advance. The throw-away tip is temporarily fixed to the tip mounting seat by pushing the fitting hole of the throw-away tip into the part and inserting it.
Therefore, there is no need to hold the throw-away tip by hand when screwing the tightening screw into the inner diameter threaded portion of the clamp auxiliary member, so it is easy to tighten the tightening screw and has excellent operability when attaching and detaching the tightening screw. .
Further, even if the throw-away tip is in a movable state without being temporarily fixed to the tip mounting seat, the head of the clamp auxiliary member is locked from the attachment hole of the throw-away tip to such an extent that it does not come off. The throw-away tip can be prevented from dropping and losing.

請求項４に記載の発明は、請求項１乃至３のいずれかのクランプ補助部材において、頭部がフランジ付き頭部であることを特徴とする。   According to a fourth aspect of the present invention, in the clamp auxiliary member according to any one of the first to third aspects, the head is a flanged head.

本発明によれば、クランプ補助部材の頭部がフランジ付きであることから、このフランジによりクランプ補助部材の頭部におけるスローアウェイチップの取付穴と係合する座面の高さ位置を定めることができる。
したがって、クランプ補助部材の頭部を介して工具本体に固着されるスローアウェイチップが、所望の取付位置からずれることなくチップ取付座に着座されることになるので、チップ取付精度が良く取付作業性に優れる。 According to the present invention, since the head of the clamp auxiliary member has a flange, the height position of the seating surface that engages with the attachment hole of the throw-away tip in the head of the clamp auxiliary member can be determined by this flange. it can.
Therefore, the throw-away tip that is fixed to the tool body via the head of the clamp auxiliary member is seated on the tip mounting seat without deviating from the desired mounting position. Excellent.

請求項５に記載の発明は、スローアウェイチップが工具本体に着脱可能に装着されてなるスローアウェイ式切削工具であって、底面にねじ穴が穿設されたチップ取付座を備える工具本体と、この工具本体のねじ穴に螺合する外径ねじ部が外周面に形成されるとともにこの外径ねじ部と反対側の一端には切欠部を有する頭部が形成され内周面には内径ねじ部が形成された略円筒状のクランプ補助部材と、この内径ねじ部に螺合する締付ねじと、この締付ねじを内径ねじ部に螺入することにより前記クランプ補助部材の頭部を介して前記チップ取付座に着脱可能に装着される取付穴が貫通形成されたスローアウェイチップとを有することを特徴とする。   The invention according to claim 5 is a throw-away cutting tool in which a throw-away tip is detachably attached to a tool main body, and a tool main body including a tip mounting seat having a screw hole formed in the bottom surface; An outer diameter threaded portion that is screwed into the screw hole of the tool body is formed on the outer peripheral surface, and a head portion having a notch is formed at one end opposite to the outer diameter threaded portion, and an inner diameter thread is formed on the inner peripheral surface. A substantially cylindrical clamp auxiliary member formed with a portion, a tightening screw screwed into the inner diameter threaded portion, and a screw screwed into the inner diameter threaded portion to insert the tightening screw into the inner diameter threaded portion. And a throw-away tip having a mounting hole that is detachably attached to the tip mounting seat.

本発明によれば、クランプ補助部材を介してスローアウェイチップの取付穴に挿通された締付ねじを、チップ取付座のねじ穴に螺合されたクランプ補助部材の内径ねじ部に螺入することにより、クランプ補助部材の頭部が切欠部を有することから、その頭部がスローアウェイチップの取付穴に弾性的に当接されて、スローアウェイチップがチップ取付座に固定されることになる。
したがって、締付ねじを完全に工具本体から取り外すことなく、締付ねじとクランプ補助部材の内径ねじ部との螺合を緩めた状態で、スローアウェイチップの着脱を行うことができる。そのため、スローアウェイチップの切れ刃の交換およびチップの取替えが簡単かつ容易であり、刃数が多いフライス等であっても短時間でチップの取替え等の作業を行うことができ、チップ着脱時の操作性および作業効率に優れたスローアウェイ式切削工具を提供することができる。また、ある程度螺合状態が確保されていることから、作業者がねじを落とし紛失することもなくなる。 According to the present invention, the tightening screw inserted into the mounting hole of the throw-away tip via the clamping auxiliary member is screwed into the inner diameter screw portion of the clamping auxiliary member screwed into the screw hole of the tip mounting seat. Thus, since the head of the clamp auxiliary member has a notch, the head is elastically brought into contact with the attachment hole of the throw-away tip, and the throw-away tip is fixed to the tip attachment seat.
Therefore, the throw-away tip can be attached and detached in a state where the screwing between the tightening screw and the inner diameter threaded portion of the clamp auxiliary member is loosened without completely removing the tightening screw from the tool body. For this reason, it is easy and easy to replace the throw-away tip and replace the tip. Even a milling machine with a large number of blades can be used to replace the tip in a short time. A throw-away cutting tool having excellent operability and work efficiency can be provided. Further, since the screwed state is ensured to some extent, the operator does not drop and lose the screw.

本発明のクランプ補助部材によれば、締付ねじを完全にスローアウェイ式切削工具本体から取り外すことなく、簡単かつ容易にスローアウェイチップの切れ刃の交換やチップの取替えを行うことが可能となり、スローアウェイ式切削工具におけるスローアウェイチップ着脱時の操作性および作業効率の向上を図ることができるという効果を奏する。   According to the clamp auxiliary member of the present invention, it becomes possible to easily and easily replace the cutting edge of the throw-away tip or replace the tip without completely removing the tightening screw from the throw-away cutting tool body, There is an effect that it is possible to improve operability and work efficiency when the throw-away tip is attached / detached in the throw-away type cutting tool.

また、本発明のスローアウェイ式切削工具によれば、クランプ補助部材を介してスローアウェイチップが工具本体に装着されるので、締付ねじを完全にスローアウェイ式切削工具本体から取り外すことなく、簡単かつ容易にスローアウェイチップの切れ刃の交換やチップの取替えを行うことができる、チップ着脱時の操作性および作業効率に優れたスローアウェイ式切削工具を提供することができるという効果を奏する。   Further, according to the throw-away cutting tool of the present invention, since the throw-away tip is attached to the tool body via the clamp auxiliary member, it is easy to completely remove the tightening screw from the throw-away cutting tool body. In addition, there is an effect that it is possible to provide a throw-away type cutting tool excellent in operability and work efficiency at the time of attaching / detaching the tip, which can easily replace the cutting edge of the throw-away tip and replace the tip.

以下に、本発明に係るクランプ補助部材の一実施形態について、図１乃至図６を参照して説明する。
図１は、本発明の一実施形態に係るクランプ補助部材を示す斜視図であり、図２は、図１に示すクランプ補助部材の正面図、図３は、図１に示すクランプ補助部材の上面図である。
また、図４は、図１のクランプ補助部材を用いたスローアウェイ式切削工具のチップ取付状態を説明する断面図であり、図５はその上面図、図６は、図１のクランプ補助部材を用いたスローアウェイ式切削工具のチップ脱着機構を説明する断面図である。 Below, one Embodiment of the clamp auxiliary member which concerns on this invention is described with reference to FIG. 1 thru | or FIG.
1 is a perspective view showing a clamp auxiliary member according to an embodiment of the present invention, FIG. 2 is a front view of the clamp auxiliary member shown in FIG. 1, and FIG. 3 is an upper surface of the clamp auxiliary member shown in FIG. FIG.
4 is a cross-sectional view for explaining a tip mounting state of a throw-away cutting tool using the clamp auxiliary member of FIG. 1, FIG. 5 is a top view thereof, and FIG. 6 is a diagram of the clamp auxiliary member of FIG. It is sectional drawing explaining the chip | tip removal | desorption mechanism of the throw away type cutting tool used.

本実施形態に係るクランプ補助部材１００は、図１乃至図３に示されるように、略円筒状の本体１０と、この本体１０の内周面に形成される締付ねじに螺合する内径ねじ部１１と、この内径ねじ部１１と締付ねじが螺合することによりスローアウェイチップに貫通形成された取付穴に当接される、本体１０の一端に形成される切欠部１４を有する頭部１３と、この頭部１３と反対側における本体１０の外周面に形成され、スローアウェイ式切削工具のチップ取付座に穿設されたねじ穴に螺合する外径ねじ部１２と、から構成されている。
そして、このクランプ補助部材１００は、切れ刃の交換やチップの取替えの度にスローアウェイチップ３００の取付穴３０に擦られることによるその頭部１３の摩滅防止の観点から、４０ＨＲＣ以上の熱処理硬度が得られる鋼種材料から形成され、例えば、炭素鋼、合金鋼、ステンレス鋼、ダイス鋼、チタン合金等から形成される。 As shown in FIGS. 1 to 3, the clamp auxiliary member 100 according to the present embodiment includes a substantially cylindrical main body 10 and an inner diameter screw that is screwed to a fastening screw formed on the inner peripheral surface of the main body 10. A head portion having a notch portion 14 formed at one end of the main body 10, which is brought into contact with a mounting hole penetratingly formed in the throw-away tip when the inner diameter screw portion 11 and the tightening screw are screwed together 13 and an outer diameter threaded portion 12 formed on the outer peripheral surface of the main body 10 on the opposite side of the head 13 and screwed into a screw hole formed in the tip mounting seat of the throw-away type cutting tool. ing.
The clamp auxiliary member 100 has a heat treatment hardness of 40 HRC or more from the viewpoint of preventing wear of the head 13 by rubbing against the mounting hole 30 of the throw-away tip 300 every time the cutting blade is replaced or the tip is replaced. It is formed from the obtained steel material, for example, formed from carbon steel, alloy steel, stainless steel, die steel, titanium alloy, or the like.

このクランプ補助部材１００は、スローアウェイ式切削工具にスローアウェイチップを装着させる際に用いられるものであって、図４および図５に示されるように、その外径ねじ部１２がスローアウェイ式切削工具のチップ取付座に穿設されたねじ穴に螺合され、その頭部１３がスローアウェイチップ３００の取付穴３０に嵌挿されるとともに、その内径ねじ部１１に締付ねじ２００が螺入されて使用される。   This clamp auxiliary member 100 is used when a throw-away tip is mounted on a throw-away cutting tool, and as shown in FIGS. 4 and 5, the outer diameter threaded portion 12 has a throw-away cutting. The head 13 is screwed into a screw hole drilled in the tool tip mounting seat, and the head 13 is inserted into the mounting hole 30 of the throw-away tip 300, and the tightening screw 200 is screwed into the inner diameter screw portion 11. Used.

つまり、このクランプ補助部材１００を用いたスローアウェイ式切削工具においては、このクランプ補助部材１００を介してスローアウェイチップ３００の取付穴３０に挿通された締付ねじ２００を、チップ取付座のねじ穴に螺合されたクランプ補助部材１００の内径ねじ部１１に螺入することにより、締付ねじ２００の頭部がクランプ補助部材１００の頭部１３の内周面に押し当てられ、その頭部１３が切欠部１４を有することからスローアウェイチップ３００の取付穴３０に弾性的に当接される結果、スローアウェイチップ３００がスローアウェイ式切削工具のチップ取付座に固定されることになる。   That is, in the throw-away cutting tool using the clamp auxiliary member 100, the tightening screw 200 inserted through the attachment hole 30 of the throw-away tip 300 through the clamp auxiliary member 100 is used as the screw hole of the tip mounting seat. The head of the clamping screw 200 is pressed against the inner peripheral surface of the head 13 of the clamp auxiliary member 100 by screwing into the inner diameter threaded portion 11 of the clamp auxiliary member 100 screwed into the head 13. Since it has the notch part 14, as a result of being elastically contacted with the mounting hole 30 of the throw-away tip 300, the throw-away tip 300 is fixed to the tip mounting seat of the throw-away cutting tool.

一方、この締付ねじ２００と内径ねじ部１１との螺合を緩めることにより、締付ねじ２００の頭部がクランプ補助部材１００の頭部１３の内周面から離隔され、クランプ補助部材１００の頭部１３が取付穴３０への拘束から放れることに伴い、チップ取付座へ拘束されていたスローアウェイチップ３００が解放される。そして、このスローアウェイチップ３００をチップ取付座から図６に図示される矢印方向に引き抜くことにより、締付ねじ２００がクランプ補助部材１００を介してねじ穴にある程度螺合された状態で、切れ刃の交換およびチップの取替えが行われることになる。   On the other hand, by loosening the screwing of the tightening screw 200 and the inner diameter screw portion 11, the head of the tightening screw 200 is separated from the inner peripheral surface of the head 13 of the clamp assisting member 100, and As the head 13 is released from the restraint to the mounting hole 30, the throw-away tip 300 restrained to the tip mounting seat is released. Then, by pulling out this throw-away tip 300 from the tip mounting seat in the direction of the arrow shown in FIG. 6, the cutting screw 200 is engaged with the screw hole to some extent via the clamp auxiliary member 100. Replacement and tip replacement will be performed.

したがって、本発明に係るクランプ補助部材を用いれば、締付ねじ１００を完全に工具本体のねじ穴から取り外すことなく、簡単かつ容易にスローアウェイチップの切れ刃の交換やチップの取替えを行うことが可能であり、刃数が多いフライス等であっても短時間でチップ取替等をすることができ、チップ着脱時の操作性および作業効率が大幅に改善される。また、チップ取替時等においても締付ねじの螺合状態がある程度確保されていることから、作業者が締付ねじを落として紛失することもない。   Therefore, if the clamping auxiliary member according to the present invention is used, it is possible to easily and easily replace the cutting edge of the throw-away tip or replace the tip without completely removing the fastening screw 100 from the screw hole of the tool body. Even if it is a milling machine etc. with many blades, it can replace a chip in a short time, and the operability and work efficiency at the time of chip attachment and detachment are greatly improved. Further, since the screwed state of the tightening screw is secured to some extent even when the chip is replaced, the operator does not lose the tightening screw.

このクランプ補助部材１００の頭部１３の内周面における最小内径は、締付ねじを内径ねじ部に挿入しない状態で、締付ねじ２００の頭部の外径よりも小さいことが好ましい。
このような構成によれば、締付ねじ２００をクランプ補助部材１００の内径ねじ部１１に螺入すると、締付ねじ２００の頭部の外径がクランプ補助部材１００の頭部１３内周面における最小内径よりも大きいので、クランプ補助部材１００の頭部１３が締付ねじ２００の頭部によって内周面側から外周面側へ押圧されることから、切欠部１４を有するクランプ補助部材１００の頭部１３が半径拡大方向に弾性変形する。
したがって、本発明に係るクランプ補助部材１００をスローアウェイ式切削工具のチップ取付座に固着した後に、このクランプ補助部材１００の頭部１３をスローアウェイチップ３００の取付穴３０に嵌挿させるとともに、その内径ねじ部１１に締付ねじ２００を螺入して、切欠部１４を有するクランプ補助部材１００の頭部１３が締付ねじ２００の頭部によって押圧されて半径拡大方向に弾性変形してスローアウェイチップ３００の取付穴３０に当接されることにより、工具本体へのスローアウェイチップ３００の装着が可能となる。 The minimum inner diameter of the inner peripheral surface of the head 13 of the auxiliary clamping member 100 is preferably smaller than the outer diameter of the head of the tightening screw 200 in a state where the tightening screw is not inserted into the inner thread portion.
According to such a configuration, when the tightening screw 200 is screwed into the inner diameter threaded portion 11 of the clamp auxiliary member 100, the outer diameter of the head of the tightening screw 200 is on the inner peripheral surface of the head 13 of the clamp auxiliary member 100. Since it is larger than the minimum inner diameter, the head 13 of the clamp auxiliary member 100 is pressed from the inner peripheral surface side to the outer peripheral surface side by the head of the tightening screw 200, so the head of the clamp auxiliary member 100 having the notch portion 14. The portion 13 is elastically deformed in the radial direction.
Therefore, after fixing the clamp auxiliary member 100 according to the present invention to the tip mounting seat of the throw-away cutting tool, the head 13 of the clamp auxiliary member 100 is inserted into the mounting hole 30 of the throw-away tip 300, and the The tightening screw 200 is screwed into the inner diameter threaded portion 11, and the head portion 13 of the clamp auxiliary member 100 having the notch portion 14 is pressed by the head portion of the tightening screw 200 and elastically deformed in the radial expansion direction, thereby throwing away. By making contact with the mounting hole 30 of the tip 300, the throw-away tip 300 can be attached to the tool body.

これに対し、この締付ねじ２００と内径ねじ部１１との螺合を緩めると、締付ねじ２００の頭部がクランプ補助部材１００の頭部１３の内周面から離隔され、半径拡大方向に弾性変形していたクランプ補助部材１００の頭部１３の形状が元の状態に戻って取付穴３０への拘束から解放されるため、このチップ取付座への拘束から解放されたスローアウェイチップ３００を引き抜くことにより、工具本体からスローアウェイチップを取り外すことができる。つまり、締付ねじ２００を完全に工具本体から取り外すことなく、締付ねじ２００とクランプ補助部材１００の内径ねじ部１１との螺合状態をある程度確保したままで、チップの着脱を行うことができる。   On the other hand, when the screwing of the tightening screw 200 and the inner diameter threaded portion 11 is loosened, the head of the tightening screw 200 is separated from the inner peripheral surface of the head 13 of the clamp auxiliary member 100, and in the radial direction. Since the shape of the head 13 of the clamp auxiliary member 100 that has been elastically deformed returns to its original state and is released from the restraint on the mounting hole 30, the throw-away tip 300 released from the restraint on the tip mounting seat is removed. By pulling out, the throw-away tip can be removed from the tool body. That is, without completely removing the fastening screw 200 from the tool body, the chip can be attached and detached while securing the screwed state between the fastening screw 200 and the inner diameter threaded portion 11 of the clamp auxiliary member 100 to some extent. .

よって、スローアウェイ式切削工具へのスローアウェイチップの装着に際し、このクランプ補助部材１００を用いた場合には、簡単かつ容易に切れ刃の交換およびチップの取替えを行うことができ、刃数が多いフライス等であっても短時間で切れ刃の交換およびチップの取替え作業を行うことが可能であることから、チップ着脱時の操作性および作業効率が向上する。また、チップ着脱時であっても締付ねじ２００は工具本体にある程度螺合されていることから、作業者がねじを落とし紛失することもない。   Therefore, when the throw auxiliary tip 100 is mounted on the throw away type cutting tool, when this clamp auxiliary member 100 is used, the cutting blade can be easily replaced and the tip can be replaced, and the number of blades is large. Even if it is a milling machine etc., it is possible to replace the cutting edge and replace the chip in a short time, so that the operability and work efficiency at the time of chip attachment / detachment are improved. Even when the chip is attached or detached, the tightening screw 200 is screwed to the tool body to some extent, so that the operator does not drop the screw and lose it.

また、このクランプ補助部材１００の頭部１３の外径は、スローアウェイチップ３００の取付穴３０の少なくとも一部分における内径よりも大きいことが好ましい。
このような構成をとると、あらかじめチップ取付座のねじ穴に螺合されたクランプ補助部材１００の頭部１３にスローアウェイチップ３００の取付穴３０を押し込んで嵌入することにより、切欠部１４を有する頭部１３が半径縮小方向に弾性変形してスローアウェイチップ３００の取付穴３０に係止されるので、スローアウェイチップ３００を工具本体に仮止めすることが可能となる。そのため、締付ねじ２００をクランプ補助部材１００の内径ねじ部１１に螺入する際に、スローアウェイチップ３００を手で押さえながらねじ締めを行う必要がないので、締付ねじ２００を締め込み易く、手をすべらせスローアウェイチップや締付ねじを落とすこともない。
また、スローアウェイチップ３００が仮止めされず移動可能な状態にあっても、頭部１３が取付穴３０から嵌脱しない程度に係止されることになるから、スローアウェイチップの落下および紛失を防止することができる。 The outer diameter of the head 13 of the auxiliary clamp member 100 is preferably larger than the inner diameter of at least a part of the mounting hole 30 of the throw-away tip 300.
With such a configuration, the notch portion 14 is provided by pushing the fitting hole 30 of the throw-away tip 300 into the head portion 13 of the clamp auxiliary member 100 screwed into the screw hole of the tip mounting seat in advance. Since the head 13 is elastically deformed in the radius reducing direction and is locked in the mounting hole 30 of the throw-away tip 300, the throw-away tip 300 can be temporarily fixed to the tool body. Therefore, when screwing the tightening screw 200 into the inner diameter threaded portion 11 of the auxiliary clamp member 100, it is not necessary to tighten the screw while holding the throw-away tip 300 by hand. Do not slide your hand and drop the throw-away tip or tightening screw.
Further, even if the throwaway tip 300 is in a movable state without being temporarily fixed, the head 13 is locked to the extent that it does not fit into the mounting hole 30. Can be prevented.

この場合において、頭部１３の外径と取付穴３０の内径との差が小さすぎると半径縮小方向への弾性変形が小さすぎて頭部１３が取付穴３０に係止されず嵌脱してしまう。逆に、頭部１３の外径が取付穴３０の内径よりも大きすぎると取付穴３０に頭部１３を簡単に手で押し込むことができなくなる。そこで、頭部１３の外径は、手で簡単に取付穴３０に押し込むことができ、かつ、手を離しても取付穴３０から嵌脱しない範囲内において適宜設計すべきである。   In this case, if the difference between the outer diameter of the head 13 and the inner diameter of the mounting hole 30 is too small, the elastic deformation in the radius reducing direction is too small, and the head 13 is not locked to the mounting hole 30 and is fitted and detached. . On the contrary, if the outer diameter of the head 13 is too larger than the inner diameter of the mounting hole 30, the head 13 cannot be easily pushed into the mounting hole 30 by hand. Therefore, the outer diameter of the head 13 should be designed as appropriate as long as it can be easily pushed into the mounting hole 30 by hand, and does not fit into the mounting hole 30 even if the hand is released.

さらに、このクランプ補助部材１００の頭部１３には、フランジ１７が形成されていることが好ましい（図１および図２参照）。
このフランジ１７により、スローアウェイチップ３００の取付穴３０と係合するクランプ補助部材１００の頭部１３の座面の高さを位置決めすることができるので、この頭部１３を介して工具本体に固着されるスローアウェイチップ３００を所望の取付位置からずれることなくチップ取付座に着座させることが可能であり、チップ取付精度が良く取付作業性に優れる。また、スローアウェイチップ３００がシート４００を介して工具本体のチップ取付座に固着される場合においては、そのシート４００がこのフランジ１７によって上から押さえ込まれてチップ取付座に固着されることになるので、締付ねじ２００を緩めてチップの取替等を行うときであっても、シート４００が位置ずれをおこすことがない（図４および図６参照）。 Furthermore, it is preferable that a flange 17 is formed on the head 13 of the auxiliary clamp member 100 (see FIGS. 1 and 2).
The height of the seating surface of the head portion 13 of the clamp auxiliary member 100 that engages with the mounting hole 30 of the throw-away tip 300 can be positioned by the flange 17, so that it is fixed to the tool body via the head portion 13. The throw-away tip 300 can be seated on the tip mounting seat without shifting from the desired mounting position, and the tip mounting accuracy is good and the mounting workability is excellent. Further, when the throw-away tip 300 is fixed to the tip mounting seat of the tool body via the sheet 400, the seat 400 is pressed from above by the flange 17 and fixed to the tip mounting seat. Even when the fastening screw 200 is loosened and the tip is replaced, the sheet 400 does not shift (see FIGS. 4 and 6).

また、クランプ補助部材１００の頭部１３の最上部における外周側１６は、面取りが施されていることが好ましい（図１および図２参照）。併せて、これに嵌合されるスローアウェイチップ３００の取付穴３０の底面側３１も面取りが施されているのが好ましい（図６参照）。
このように頭部１３と取付穴３０の嵌入部分１６，３１に面取りが施されていると、頭部１３の外径が取付穴３０の少なくとも一部分おける内径よりも大きい構成となっている場合であっても、スムーズに頭部１３を取付穴３０に押し込むことができる。 Moreover, it is preferable that the outer peripheral side 16 at the uppermost portion of the head 13 of the auxiliary clamp member 100 is chamfered (see FIGS. 1 and 2). In addition, it is preferable that the bottom surface side 31 of the mounting hole 30 of the throw-away tip 300 fitted thereto is also chamfered (see FIG. 6).
In this way, when the fitting portions 16 and 31 of the head 13 and the mounting hole 30 are chamfered, the outer diameter of the head 13 is larger than the inner diameter of at least a part of the mounting hole 30. Even if it exists, the head 13 can be smoothly pushed into the mounting hole 30.

また、クランプ補助部材１００の頭部１３の上部における内周側１５は、締付ねじ２００の頭部座面２０の形状にあわせた面取りが施されていることが好ましい。例えば、頭部の形状がテーパ形状（逆円錐状）２０に形成されている締付ねじ２００が使用される場合には、このクランプ補助部材１００の頭部１３の上部における内周側１５は、その締付ねじ２００の頭部座面２０のテーパ角度とほぼ同じ角度のテーパ形状（逆円錐状）の面取りが施されていることが好ましい（図１、図４および図６参照）。
このように頭部１３の締付ねじ嵌入部分１５に、締付ねじ２００の頭部座面２０の形状にあわせた面取りが施されていると、締付ねじ２００をクランプ補助部材１００の内径ねじ部１１に螺入した場合に、クランプ補助部材１００の頭部と締付ねじ２００の頭部との係合面が全面当たり状態となって密着性に優れる。また、これによりクランプ補助部材１００の頭部１３と締付ねじ２００の頭部の係合面における摩滅を抑制することもできる。そして、その係合面に溝が生じて締付ねじの頭部が破断することもない。 Moreover, it is preferable that the inner peripheral side 15 in the upper part of the head 13 of the auxiliary clamp member 100 is chamfered according to the shape of the head seating surface 20 of the tightening screw 200. For example, when a tightening screw 200 having a head shape of a tapered shape (inverted conical shape) 20 is used, the inner peripheral side 15 of the upper portion of the head 13 of the clamp auxiliary member 100 is It is preferable that a chamfering of a taper shape (inverted conical shape) having substantially the same angle as the taper angle of the head seat surface 20 of the tightening screw 200 is performed (see FIGS. 1, 4 and 6).
In this way, when the chamfering portion 15 of the head 13 is chamfered in accordance with the shape of the head seating surface 20 of the tightening screw 200, the tightening screw 200 is connected to the inner diameter screw of the clamp auxiliary member 100. When screwed into the portion 11, the engagement surface between the head of the clamp auxiliary member 100 and the head of the tightening screw 200 is in a state of contact with the entire surface and has excellent adhesion. In addition, wear on the engagement surface between the head 13 of the auxiliary clamp member 100 and the head of the tightening screw 200 can also be suppressed. And the groove | channel does not arise in the engaging surface, but the head of a clamping screw does not fracture | rupture.

なお、本実施形態に係るクランプ補助部材として、頭部１３にフランジ１７が形成されたクランプ補助部材１００を図示したが、これに限定されるものではなく、頭部１３にフランジ１７が形成されていないクランプ補助部材１００としてもよい。また、本実施形態に係るクランプ補助部材を用いたスローアウェイ式切削工具のチップ取付機構として、スローアウェイチップ３００をシート４００の上に載置してチップ取付座に固着する場合を図示したが、このような構成に限定されるものではなく、シート４００を介さず、直接スローアウェイチップ３００をチップ取付座に載置して固着するようにしてもよい。   In addition, although the clamp auxiliary member 100 in which the flange 17 was formed in the head 13 was illustrated as a clamp auxiliary member which concerns on this embodiment, it is not limited to this, The flange 17 is formed in the head 13 There may be no clamping auxiliary member 100. Further, as a tip attachment mechanism of the throw-away type cutting tool using the clamp auxiliary member according to the present embodiment, the case where the throw-away tip 300 is placed on the sheet 400 and fixed to the tip attachment seat is illustrated. The present invention is not limited to such a configuration, and the throw-away tip 300 may be directly placed on and fixed to the tip mounting seat without using the seat 400.

以下、本発明のスローアウェイ式切削工具の一実施形態について、スクリューオン方式を採用するスローアウェイ式正面フライスを実施例として挙げ、図７乃至図９を参照して説明する。
図７は、本発明に係るスローアウェイ式切削工具の一実施例を示すスローアウェイ式正面フライスのチップ取付前における正面図である。また、図８は、図７に示すスローアウェイ式正面フライスのチップ取付状態を説明する断面図である。そして、図９は、図７に示すスローアウェイ式正面フライスのチップ取付後におけるチップ取付部分の拡大図である。 Hereinafter, an embodiment of the throw-away type cutting tool of the present invention will be described with reference to FIGS. 7 to 9 by taking as an example a throw-away type face mill that employs a screw-on method.
FIG. 7 is a front view of a throw-away type front milling cutter according to an embodiment of the present invention before the tip is attached. FIG. 8 is a cross-sectional view for explaining the tip mounting state of the throw-away type face mill shown in FIG. FIG. 9 is an enlarged view of the tip mounting portion after the tip mounting of the throw-away type face mill shown in FIG.

本発明のスローアウェイ式切削工具の一実施例に係るスローアウェイ式正面フライス５００は、図７に示されるように、円盤状をなしており、この工具本体の先端側の外周部には複数のチップポケットが形成されており、これらのチップポケットの工具回転方向の後方側にはチップ取付座５０が形成されている。これらチップ取付座５０は、工具回転方向を向く底面５１と、この底面５１と交差する壁面５２とからなり、この底面５１にはねじ穴５３が穿設されている。   A throw-away face mill 500 according to an embodiment of the throw-away cutting tool of the present invention has a disk shape as shown in FIG. Chip pockets are formed, and chip mounting seats 50 are formed on the rear side in the tool rotation direction of these chip pockets. These tip mounting seats 50 are composed of a bottom surface 51 facing the tool rotation direction and a wall surface 52 intersecting with the bottom surface 51, and a screw hole 53 is formed in the bottom surface 51.

このスローアウェイ式正面フライスに装着されるスローアウェイチップ３００は、超硬合金、サーメット、セラミックス等から形成される略四角形の平板状をなし、その辺稜部に切れ刃が形成されるとともに、取付穴３０が貫通形成されている。   The throw-away tip 300 attached to this throw-away type front milling cutter has a substantially rectangular flat plate shape made of cemented carbide, cermet, ceramics, etc., and a cutting edge is formed on the side ridge portion, and attachment A hole 30 is formed through.

これらスローアウェイチップ３００をスローアウェイ式正面フライス５００に取り付ける際に用いられるクランプ補助部材１００は、炭素鋼、合金鋼、ステンレス鋼、ダイス鋼、チタン合金等から形成される略円筒状をなし、その外周面にはスローアウェイ式正面フライス５００のチップ取付座５０の底面５１に穿設されたねじ穴５３に螺合する外径ねじ部１２が形成され、この外径ねじ部１２と反対側の一端には切欠部１４を有する頭部１３が形成されるとともに、その内周面にはその締付ねじ２００と螺合する内径ねじ部１１が形成されている（図１および図２参照）。
このクランプ補助部材１００は、図７に示されるように、スローアウェイ式正面フライス５００のチップ取付座５０にシート４００を着座させた後、シートに貫通形成された貫通穴を介して、その外径ねじ部１２をねじ穴５３に螺入することによりチップ取付座に固着されて使用される。 The clamp auxiliary member 100 used when attaching these throw-away tips 300 to the throw-away face mill 500 has a substantially cylindrical shape formed of carbon steel, alloy steel, stainless steel, die steel, titanium alloy, etc. An outer diameter threaded portion 12 that is screwed into a screw hole 53 formed in the bottom surface 51 of the tip mounting seat 50 of the throw-away type face mill 500 is formed on the outer peripheral surface, and one end opposite to the outer diameter threaded portion 12 is formed. A head portion 13 having a notch portion 14 is formed, and an inner diameter screw portion 11 screwed with the fastening screw 200 is formed on an inner peripheral surface thereof (see FIGS. 1 and 2).
As shown in FIG. 7, the clamp auxiliary member 100, after the seat 400 is seated on the tip mounting seat 50 of the throw-away type front milling machine 500, the outer diameter thereof is passed through a through hole formed through the seat. By screwing the screw part 12 into the screw hole 53, the screw part 12 is fixed to the chip mounting seat and used.

そして、このクランプ補助部材１００の頭部１３をスローアウェイチップ３００の取付穴３０に嵌挿させるとともに、その内径ねじ部１１に締付ねじ２００を螺入することにより、締付ねじ２００の頭部がクランプ補助部材１００の頭部１３の内周面に押し当てられ、その切欠部１４を有する頭部１３が半径拡大方向に弾性変形してスローアウェイチップ３００の取付穴３０の内周面に弾性的に当接されて、スローアウェイ式正面フライス５００にスローアウェイチップ３００が装着されるように構成されている（図８参照）。   Then, the head 13 of the clamping auxiliary member 100 is fitted into the mounting hole 30 of the throw-away tip 300, and the tightening screw 200 is screwed into the inner diameter threaded portion 11, whereby the head of the tightening screw 200 is inserted. Is pressed against the inner peripheral surface of the head 13 of the clamp assisting member 100, and the head 13 having the notch 14 is elastically deformed in the radial expansion direction to be elastic to the inner peripheral surface of the mounting hole 30 of the throw-away tip 300. The throw-away tip 300 is mounted on the throw-away type front milling cutter 500 (see FIG. 8).

このようにして複数のスローアウェイチップ３００が装着されたスローアウェイ式正面フライス５００は、工具本体５００をその軸線回りに回転させつつ送りを与えることにより、被加工物に接触させながら移動させて使用され、これらスローアウェイチップ３００の工具外周側に向けられた外周切れ刃と工具先端側に向けられた正面切れ刃によって切削が行われることになる。   In this way, the throw-away face mill 500 on which a plurality of throw-away tips 300 are mounted is used by moving the tool body 500 while making contact with the workpiece by feeding the tool body 500 around its axis. Then, the cutting is performed by the outer peripheral cutting edge directed to the tool outer peripheral side of these throw-away tips 300 and the front cutting edge directed to the tool distal end side.

一方、スローアウェイチップ３００の切れ刃の交換およびチップの取替えを行う場合においては、締付ねじ２００と内径ねじ部１１との螺合を緩め、締付ねじ２００の頭部２０をクランプ補助部材１００の頭部１３の内周面から離隔し、半径拡大方向に弾性変形していたクランプ補助部材１００の頭部１３を元の形状に戻してスローアウェイチップ３００の取付穴３０への拘束から解放した上で、チップ取付座５０への拘束から解放されたスローアウェイチップ３００をチップ取付座５０から引き抜いて、切れ刃の交換およびチップの取替えを行うことになる（図６および図７参照）。   On the other hand, when exchanging the cutting edge of the throw-away tip 300 and replacing the tip, the screwing of the tightening screw 200 and the inner diameter screw portion 11 is loosened, and the head 20 of the tightening screw 200 is attached to the clamping auxiliary member 100. The head 13 of the clamp auxiliary member 100 that was separated from the inner peripheral surface of the head 13 and elastically deformed in the radial expansion direction was returned to its original shape and released from the restraint to the mounting hole 30 of the throw-away tip 300. The throw-away tip 300 released from the restraint on the tip mounting seat 50 is pulled out from the tip mounting seat 50 to replace the cutting blade and replace the tip (see FIGS. 6 and 7).

したがって、従来のスクリューオン方式のスローアウェイ式正面フライスとは異なり、締付ねじ２００を完全に工具本体から取り外すことなく、締付ねじ２００とクランプ補助部材１００の内径ねじ部１１との螺合を緩めるだけで、簡単かつ容易にスローアウェイチップ３００の切れ刃の交換およびチップの取替えを行うことができる。そのため、刃数が多いフライス等であっても短時間でチップ取替等をすることができ、チップ着脱時の操作性および作業効率に優れたスローアウェイ式正面フライス５００を提供することができる。また、このスローアウェイ式正面フライス５００によれば、チップ取替時等においても締付ねじ２００の螺合状態がある程度確保されていることから、チップの取替等を行う際に作業者が締付ねじを落として紛失することもない。さらに、このようなスクリューオン方式のスローアウェイ式正面フライス５００によれば、スローアウェイチップを工具本体に取り付けるため構造が簡単で、安価に製造することができるとともに工具管理も容易であり、設計的にもコンパクトであることから、スローアウェイチップを取り付けるためのスペースが限定される場合においても適用できる。   Therefore, unlike the conventional screw-on type throw-away face mill, the fastening screw 200 and the inner diameter threaded portion 11 of the clamp auxiliary member 100 are screwed together without completely removing the fastening screw 200 from the tool body. By simply loosening, the cutting edge of the throw-away tip 300 and the tip can be replaced easily and easily. Therefore, even with a milling machine having a large number of blades, it is possible to replace the chip in a short time, and it is possible to provide the throw-away type front milling machine 500 that is excellent in operability and work efficiency when inserting and removing the chip. In addition, according to the throw-away type face mill 500, the screwing state of the tightening screw 200 is secured to some extent even when the chip is replaced, so that the operator can tighten the chip when replacing the chip. The attached screw is not dropped and lost. Furthermore, according to such a screw-on type throw-away face mill 500, the structure is simple because the throw-away tip is attached to the tool body, and the structure can be manufactured at low cost, and the tool management is easy. In addition, since it is compact, it can be applied even when the space for attaching the throw-away tip is limited.

また、このスローアウェイ式正面フライス５００においては、チップ取付座５０の底面５１に穿設されたねじ穴５３の中心軸線Ｃ２が、チップ取付座５０に着座させたスローアウェイチップ３００の取付穴３０の中心軸線Ｃ１に対して偏心するように形成されていることが好ましい（図９参照）。
このような構成によれば、ねじ穴５３に螺合されたクランプ補助部材１００の頭部１３をスローアウェイチップ３００の取付穴３０に嵌挿させるとともに、その内径ねじ部１１に締付ねじ２００を螺入することで、締付ねじ２００の頭部が、Ｃ１からＣ２の方向に向かって弾性変形しながら押し当てられることになり、スローアウェイチップ３００が、チップ取付座５０の底面側５１に押圧されつつ壁面側５２に引き込まれるようにして、工具本体５００に固定されることになる。そのため、スローアウェイチップ３００とチップ取付座５０との密着性が向上し、切削加工に伴うびびり振動等の抑制が可能となり、スローアウェイチップ３００の刃先の欠損等の防止を図ることができる。 Further, in this throw-away type front milling machine 500, the central axis C <b> 2 of the screw hole 53 drilled in the bottom surface 51 of the tip mounting seat 50 is formed in the mounting hole 30 of the throw-away tip 300 seated on the tip mounting seat 50. It is preferably formed so as to be eccentric with respect to the central axis C1 (see FIG. 9).
According to such a configuration, the head 13 of the auxiliary clamp member 100 screwed into the screw hole 53 is inserted into the mounting hole 30 of the throw-away tip 300, and the tightening screw 200 is attached to the inner diameter screw portion 11. By screwing, the head of the tightening screw 200 is pressed while being elastically deformed from C1 to C2, and the throw-away tip 300 is pressed against the bottom surface side 51 of the tip mounting seat 50. The tool body 500 is fixed so as to be pulled into the wall surface side 52 while being pulled. Therefore, the adhesion between the throw-away tip 300 and the tip mounting seat 50 is improved, chatter vibration and the like associated with the cutting process can be suppressed, and the cutting edge of the throw-away tip 300 can be prevented from being damaged.

本実施例に係るスローアウェイ式正面フライス５００は、換言すると、上述した本発明に係るクランプ補助部材１００を用いてスローアウェイチップ２００を工具本体に着脱可能に装着したものである。つまり、このスローアウェイ式正面フライス５００に用いられるクランプ補助部材は、上述した本発明に係るクランプ補助部材１００と同一である。したがって、本実施例においては、上述した本発明に係るクランプ補助部材１００の説明と共通する事項については、その説明を省略する。   In other words, the throw-away type face mill 500 according to the present embodiment is configured such that the throw-away tip 200 is detachably attached to the tool body using the above-described clamp auxiliary member 100 according to the present invention. That is, the clamp auxiliary member used in the throw-away type front milling cutter 500 is the same as the clamp auxiliary member 100 according to the present invention described above. Therefore, in the present embodiment, the description of matters common to the description of the clamp auxiliary member 100 according to the present invention described above is omitted.

なお、前記実施例においては、本発明に係るスローアウェイ式切削工具として、スローアウェイ式正面フライス５００を例に挙げて説明したがこれに限定されるものではなく、スクリューオン方式を採用するスローアウェイバイト、スローアウェイドリル、スローアウェイエンドミル等多種の切削工具に適用することができる。
また、前記実施例においては、スローアウェイチップ３００として略四角形の平板状をなすものを採用したが、これに代えて三角形、菱形等の略多角形や円形の平板状のスローアウェイチップを採用してもよく、ネガティブチップでもポジティブチップでもよい。
また、前記実施例におけるチップ取付状態として、スローアウェイチップ３００をシート４００の上に載置してチップ取付座に固着する場合を図示したが、このような構成に限定されるものではなく、シート４００を介さず、直接スローアウェイチップ３００をチップ取付座に載置して固着するようにしてもよい。 In the above-described embodiment, the throw-away type face mill 500 has been described as an example of the throw-away type cutting tool according to the present invention, but the present invention is not limited to this, and the throw-away method adopting a screw-on method is used. It can be applied to various cutting tools such as cutting tools, throw-away drills, and throw-away end mills.
Further, in the above embodiment, the throwaway tip 300 having a substantially rectangular flat plate shape is adopted, but instead of this, a substantially polygonal shape such as a triangle or a rhombus or a circular flat plate shaped throwaway tip is adopted. It may be a negative chip or a positive chip.
Moreover, although the case where the throw-away tip 300 is mounted on the sheet 400 and fixed to the chip mounting seat is illustrated as the chip mounting state in the embodiment, the present invention is not limited to such a configuration. The throw-away tip 300 may be directly placed on and fixed to the tip mounting seat without going through 400.

本発明の一実施形態に係るクランプ補助部材を示す斜視図である。It is a perspective view showing a clamp auxiliary member concerning one embodiment of the present invention. 図１に示すクランプ補助部材の正面図である。It is a front view of the clamp auxiliary member shown in FIG. 図１に示すクランプ補助部材の上面図である。It is a top view of the clamp auxiliary member shown in FIG. 図１のクランプ補助部材を用いたスローアウェイ式切削工具のチップ取付状態を説明する断面図である。It is sectional drawing explaining the chip | tip attachment state of the throw-away type cutting tool using the clamp auxiliary member of FIG. 図４の上面図である。FIG. 5 is a top view of FIG. 4. 図１のクランプ補助部材を用いたスローアウェイ式切削工具のチップ脱着機構を説明する断面図である。It is sectional drawing explaining the chip | tip removal | desorption mechanism of the throw-away type cutting tool using the clamp auxiliary member of FIG. 本発明に係るスローアウェイ式切削工具の一実施例を示すスローアウェイ式正面フライスのチップ取付前における正面図である。It is a front view before the chip | tip attachment of the throw-away type front milling which shows one Example of the throw-away type cutting tool which concerns on this invention. 図７に示すスローアウェイ式正面フライスのチップ取付状態を説明する断面図である。It is sectional drawing explaining the chip | tip attachment state of the throwaway type front milling machine shown in FIG. 図７に示すススローアウェイ式正面フライスのチップ取付後におけるチップ取付部分の拡大図である。It is an enlarged view of the chip | tip attachment part after the chip | tip attachment of the throw-away type front milling machine shown in FIG.

符号の説明Explanation of symbols

１０ 本体
１１ 内径ねじ部
１２ 外径ねじ部
１３ 頭部
１４ 切欠部
１７ フランジ
３０ 取付穴
５０ チップ取付座
５３ ねじ穴
１００ クランプ補助部材
２００ 締付ねじ
３００ スローアウェイチップ
５００ スローアウェイ式切削工具
Ｃ１ 取付穴の中心
Ｃ２ ねじ穴の中心
DESCRIPTION OF SYMBOLS 10 Main body 11 Inner diameter thread part 12 Outer diameter thread part 13 Head part 14 Notch part 17 Flange 30 Mounting hole 50 Tip mounting seat 53 Screw hole 100 Clamping auxiliary member 200 Tightening screw 300 Throw away tip 500 Throw away type cutting tool C1 Mounting hole Center C2 Center of screw hole

Claims (5)

略円筒状の本体と、
この本体の内周面に形成される、締付ねじに螺合する内径ねじ部と、
この内径ねじ部と前記締付ねじが螺合することによりスローアウェイチップに貫通形成された取付穴に当接される、前記本体の一端に形成される切欠部を有する頭部と、
この頭部と反対側における前記本体の外周面に形成され、スローアウェイ式切削工具のチップ取付座に穿設されたねじ穴に螺合する外径ねじ部と
を有するクランプ補助部材。 A substantially cylindrical body;
An inner diameter threaded portion that is formed on the inner peripheral surface of the main body and is screwed into a tightening screw;
A head having a notch formed at one end of the main body, which is brought into contact with a mounting hole formed through the throw-away tip by screwing the inner screw portion and the fastening screw;
A clamp auxiliary member having an outer diameter thread portion formed on the outer peripheral surface of the main body on the side opposite to the head portion and screwed into a screw hole formed in a tip mounting seat of a throw-away type cutting tool. 前記クランプ補助部材の頭部の内周面における最小内径が、前記締付ねじの頭部の外径よりも小さい
ことを特徴とする請求項１に記載のクランプ補助部材。 The clamp auxiliary member according to claim 1, wherein a minimum inner diameter of an inner peripheral surface of the head of the clamp auxiliary member is smaller than an outer diameter of the head of the tightening screw. 前記クランプ補助部材の頭部の外径が、前記取付穴の少なくとも一部分における内径よりも大きい
ことを特徴とする請求項１または請求項２に記載のクランプ補助部材。 The clamp auxiliary member according to claim 1 or 2, wherein an outer diameter of a head of the clamp auxiliary member is larger than an inner diameter of at least a part of the mounting hole. 前記クランプ補助部材の頭部が、フランジ付き頭部である
ことを特徴とする請求項１乃至３のいずれか一項に記載のクランプ補助部材。 The clamp auxiliary member according to any one of claims 1 to 3, wherein the head of the clamp auxiliary member is a head with a flange. 底面にねじ穴が穿設されたチップ取付座を備える工具本体と、
この工具本体のねじ穴に螺合する外径ねじ部が外周面に形成されるとともに、この外径ねじ部と反対側の一端には切欠部を有する頭部が形成され、内周面には内径ねじ部が形成された略円筒状のクランプ補助部材と、
この内径ねじ部に螺合する締付ねじと、
この締付ねじを内径ねじ部に螺入することにより前記クランプ補助部材の頭部を介して前記チップ取付座に着脱可能に装着される、取付穴が貫通形成されたスローアウェイチップと
を有するスローアウェイ式切削工具。
A tool body including a tip mounting seat with a screw hole drilled in the bottom;
An outer diameter threaded portion that is screwed into the screw hole of the tool body is formed on the outer peripheral surface, and a head portion having a notch is formed at one end opposite to the outer diameter threaded portion, and an inner peripheral surface is formed on the inner peripheral surface. A substantially cylindrical clamping auxiliary member formed with an inner diameter thread portion;
A tightening screw to be screwed onto the inner diameter threaded portion;
A throw having a throw-away tip with a mounting hole penetratingly attached to the tip mounting seat through the head of the auxiliary clamp member by screwing the tightening screw into the inner diameter screw portion Away-type cutting tool.
JP2006198079A 2006-07-20 2006-07-20 Clamp auxiliary member and throw-away cutting tool with clamp auxiliary member Pending JP2008023643A (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
JP2008023643A true JP2008023643A (en) 2008-02-07

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ID=39114805

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Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011073104A (en) * 2009-09-30 2011-04-14 Kyocera Corp Cutting tool holder, cutting tool and method of manufacturing machinable workpiece using the same
WO2011111198A1 (en) 2010-03-10 2011-09-15 株式会社タンガロイ Clamp assistant member and cutting tool including clamp assistant member
CN115302189A (en) * 2022-02-17 2022-11-08 重庆灵龙实业发展有限公司 Processing method of claw head with high fatigue life and high strength

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62114803A (en) * 1985-11-11 1987-05-26 Mitsubishi Metal Corp Throw away type cutting tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62114803A (en) * 1985-11-11 1987-05-26 Mitsubishi Metal Corp Throw away type cutting tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011073104A (en) * 2009-09-30 2011-04-14 Kyocera Corp Cutting tool holder, cutting tool and method of manufacturing machinable workpiece using the same
WO2011111198A1 (en) 2010-03-10 2011-09-15 株式会社タンガロイ Clamp assistant member and cutting tool including clamp assistant member
CN102781613A (en) * 2010-03-10 2012-11-14 株式会社钨钛合金 Clamp assistant member and cutting tool including clamp assistant member
JP5093421B2 (en) * 2010-03-10 2012-12-12 株式会社タンガロイ Clamp auxiliary member and cutting tool provided with the clamp auxiliary member
CN115302189A (en) * 2022-02-17 2022-11-08 重庆灵龙实业发展有限公司 Processing method of claw head with high fatigue life and high strength

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