WO2016148284A1 - Cutting head for rotary cutting tool - Google Patents

Cutting head for rotary cutting tool Download PDF

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Publication number
WO2016148284A1
WO2016148284A1 PCT/JP2016/058743 JP2016058743W WO2016148284A1 WO 2016148284 A1 WO2016148284 A1 WO 2016148284A1 JP 2016058743 W JP2016058743 W JP 2016058743W WO 2016148284 A1 WO2016148284 A1 WO 2016148284A1
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Prior art keywords
cutting
cutting head
groove
rotary
head
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PCT/JP2016/058743
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French (fr)
Japanese (ja)
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良治 池尻
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良治 池尻
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Publication of WO2016148284A1 publication Critical patent/WO2016148284A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine

Definitions

  • the present invention relates to a cutting head for a rotary cutting tool.
  • the present invention was originally developed as a cutting head of a rotary cutting instrument used for dental technicians, and will be described in the following description. In addition, it is widely used for cutting of metal and wood, excavation of civil engineering, etc. It can also be used as a cutting head of a rotary cutting tool.
  • a cutting head as shown in FIG. 3 (a) is attached to the tip of the handpiece, and while rotating it at a high speed, it is processed against a resin product, dentures, or a plaster model.
  • a cutting head for example, JP-T-2003-517350 is known.
  • An object of the present invention is to provide a cutting head for a rotary cutting tool capable of preventing or reducing such resin entanglement and premature wear of a product.
  • the present invention comprises a shaft portion having a mounting portion attached to a handpiece of a rotary cutting tool, and a cutting blade portion at the tip of the shaft portion, and the cutting blade portion includes a plurality of axial grooves and a plurality of axial blades.
  • the cutting head has a feature that heat generation during cutting is suppressed by providing at least one slightly deep groove in the circumferential direction in the cutting blade portion.
  • the depth, width, number, and interval of grooves differ greatly depending on the size of the cutting head, location, and purpose of use.
  • the groove depth is 0.2 mm to 2.0 mm
  • the groove width is 0.5 mm to 2.0 mm at the surface position
  • the number is one. This is sufficient as long as the width is 1 to 3 for a wide groove, and 1 to 5 for a narrow groove.
  • a cutting head suitable for a rotary cutting instrument used in a dental technician can be obtained.
  • FIG. 6 is a front view of each cutting head according to Examples 2 to 5.
  • the cutting head 1 of Example 1 shown in FIG. 2 is attached to the tip of a hand piece 2 of a rotary cutting tool as shown in FIG.
  • the cutting head 1 includes a shaft portion 12 having a mounting portion 11 attached to the handpiece 2 and a cutting blade portion 13 at the tip of the shaft portion 12.
  • the cutting blade portion 13 is slightly tapered toward the tip, and has eight axial grooves 15 and axial blades 16 from the conical center body 14.
  • the axial grooves 15 and blades 16 are slightly twisted, as can be seen in FIGS.
  • the blade 16 is provided with a shallow wavy jagged groove 17.
  • a feature of the present invention is that at least one circumferentially slightly deep groove 18 is provided in the cutting blade portion 13. In the embodiment of FIG. 2, it can be seen that one circumferential deep groove 18 is provided near the tip.
  • the depth, width, number, and interval of the grooves 18 vary greatly depending on the size of the cutting head, the location of use, and the purpose of use. However, it is clear that if the depth is too deep, too wide, or the number of blades increases, the number of blades that operate is reduced, which not only reduces cutting efficiency but also easily breaks. .
  • the groove depth is 0.2 mm to 2.0 mm, preferably 0.5 mm to 1.0 mm, and the groove width is 0.5 mm to 2.0 mm at the surface position. It should be 0 mm, preferably 1.0 mm to 1.5 mm, and should be clearly distinguishable from the shallow jagged grooves 17 found in the prior art. In the case of a wide groove, about 1 to 3 is appropriate, and in the case of a narrow groove, about 1 to 5 is sufficient.
  • FIGS. 4A to 4D are front views of the cutting heads according to Examples 2 to 5, respectively. Each has a plurality of axial grooves and a plurality of axial blades.
  • the cutting head 1B of the second embodiment is a mandarin orange type and has one groove 18B.
  • the cutting head 1C of Example 3 is a balloon type, and there are two grooves 18C.
  • the cutting head 1D of Example 4 is a bud type, and there are three grooves 18D.
  • the cutting head 1E of Example 5 is also another bud type, and has four grooves 18E.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Provided is a cutting head for a rotary cutting tool, the cutting head being capable of preventing or reducing resin entanglement and premature wear. A cutting head (1) comprising a shaft (12), which has a mounting portion (11) for mounting on the hand piece (2) of a rotary cutting tool, and a cutting blade portion (13) at the shaft tip, wherein the cutting blade portion (13) has a plurality of axial grooves (15) and a plurality of axial blades (16). The cutting blade portion (13) is equipped with at least one slightly deeper groove (18) in the circumferential direction. When used in a rotary cutting tool used in dental techniques, the groove depth is preferably 0.3 mm-2.0 mm, the groove width is preferably 0.5 mm-2.0 mm at the surface position, and the number of grooves is preferably 1-5.

Description

回転切削工具用切削ヘッドCutting head for rotary cutting tools
　本発明は回転切削工具用切削ヘッドに関する。本発明は、もともと歯科技工に使われる回転切削器具の切削ヘッドとして開発されたもので、以下の説明でもそれについて行うが、その他、金属や木材の切削加工、土木の掘削工事など、広く一般の回転切削工具の切削ヘッドとしても使用可能である。 The present invention relates to a cutting head for a rotary cutting tool. The present invention was originally developed as a cutting head of a rotary cutting instrument used for dental technicians, and will be described in the following description. In addition, it is widely used for cutting of metal and wood, excavation of civil engineering, etc. It can also be used as a cutting head of a rotary cutting tool.
　歯科医や歯科技工士は、回転切削工具を用いてレジン制作物や入れ歯、石膏模型の調整を行うことが多い。ハンドピースの先端に図３（ａ）に示すような切削ヘッドを取り付け、これを高速で回転させつつ、レジン制作物や入れ歯、石膏模型に当てて加工するのである。そのような切削ヘッドとして、例えば特表２００３―５１７３５０が公知である。 Dentists and dental technicians often adjust resin products, dentures, and plaster models using rotary cutting tools. A cutting head as shown in FIG. 3 (a) is attached to the tip of the handpiece, and while rotating it at a high speed, it is processed against a resin product, dentures, or a plaster model. As such a cutting head, for example, JP-T-2003-517350 is known.
特表２００３―５１７３５０Special table 2003-517350
　例えば総義歯３（図１）の加工をするとき、口蓋部床縁３１のレジンに切削ヘッド１Ａ（図３）を当てると、切削刃１３Ａから発生する摩擦熱によりこれらの樹脂３２が溶融して、図３（ｂ）のように切削刃１６に絡まってしまいやすい。溶融しない固形物、例えば歯牙エナメル質・象牙質、その他、木・金属・岩・石を削るときでも、摩擦熱により切削ヘッドの消耗が進行しやすい。 For example, when processing the complete denture 3 (FIG. 1), when the cutting head 1A (FIG. 3) is applied to the resin of the palate floor edge 31, the resin 32 is melted by the frictional heat generated from the cutting blade 13A. As shown in FIG. 3B, the cutting blade 16 is easily entangled. Even when cutting solid materials that do not melt, such as tooth enamel and dentin, and other wood, metal, rocks, and stones, wear of the cutting head tends to proceed due to frictional heat.
　このようになると、使用継続が困難となるので、清掃するか、新しい切削ヘッドに取り換える必要が生じる。切削ヘッドの素材にもよるが、たいていの場合、清掃に要する時間や労力を考慮すると、新しい切削ヘッドに取り換える方が有利であることが多い。 If this happens, it will be difficult to continue using it, and it will be necessary to clean it or replace it with a new cutting head. Depending on the material of the cutting head, it is often advantageous to replace it with a new cutting head in consideration of the time and labor required for cleaning.
　このような回転切削中の発熱に起因する樹脂の絡み付きや製品の早期消耗を防止又は減少させることができれば、切削ヘッドの製品寿命が延び経済的である。本発明は、このような樹脂の絡み付きや製品の早期消耗を防止又は減少させることのできる回転切削工具用切削ヘッドを提供することを目的とする。 If it is possible to prevent or reduce resin entanglement and premature wear of the product due to such heat generation during rotary cutting, the product life of the cutting head is extended and it is economical. An object of the present invention is to provide a cutting head for a rotary cutting tool capable of preventing or reducing such resin entanglement and premature wear of a product.
　本発明は、回転切削工具のハンドピースへ取り付ける取付部を有する軸部と、この軸部先端の切削刃部からなり、前記切削刃部が複数の軸方向の溝と複数の軸方向の刃を有する切削ヘッドにおいて、切削刃部に周方向のやや深い溝を少なくとも１本設けることにより、切削中の発熱を抑制させたことを特徴とする。 The present invention comprises a shaft portion having a mounting portion attached to a handpiece of a rotary cutting tool, and a cutting blade portion at the tip of the shaft portion, and the cutting blade portion includes a plurality of axial grooves and a plurality of axial blades. The cutting head has a feature that heat generation during cutting is suppressed by providing at least one slightly deep groove in the circumferential direction in the cutting blade portion.
　ここで「やや深い溝」というのは表面のわずかなギザギザ溝を含めないという趣旨である。 “Here,“ slightly deep groove ”means that a slight jagged groove on the surface is not included.
　溝の深さ、幅、本数、間隔については切削ヘッドの大きさ、使用個所、使用目的により大きく異なる。切削ヘッドが例えば歯科技工に使われる回転切削器具に用いるものである場合、溝の深さは０.２ｍｍ～２.０ｍｍ、溝幅は表面位置において０.５ｍｍ～２.０ｍｍ、本数は1本以上であればよく、幅広の溝の場合、例えば１～３本であり、幅狭の溝の場合、例えば１～５本である。 溝 The depth, width, number, and interval of grooves differ greatly depending on the size of the cutting head, location, and purpose of use. For example, when the cutting head is used for a rotary cutting instrument used in a dental technician, the groove depth is 0.2 mm to 2.0 mm, the groove width is 0.5 mm to 2.0 mm at the surface position, and the number is one. This is sufficient as long as the width is 1 to 3 for a wide groove, and 1 to 5 for a narrow groove.
　本願の独立請求項の発明によると、切削刃部に周方向のやや深い溝を少なくとも１本設けることにより、回転切削中の発熱に起因する樹脂の絡み付きや製品の早期消耗を確実に減少させることができ、切削ヘッドの交換頻度を下げることができた。接触面積が減少することにより、摩擦熱が減少するためであると推定される。 According to the invention of the independent claim of the present application, by providing at least one circumferentially slightly deep groove in the cutting blade part, it is possible to reliably reduce resin entanglement and premature wear of the product due to heat generation during rotary cutting. It was possible to reduce the replacement frequency of the cutting head. It is presumed that this is because the frictional heat is reduced by reducing the contact area.
　本願の従属請求項の発明によると、歯科技工に使われる回転切削器具に適当な切削ヘッドが得られる。 According to the invention of the dependent claim of the present application, a cutting head suitable for a rotary cutting instrument used in a dental technician can be obtained.
　以下、添付の図面に基づき、本発明の１実施例を説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
本発明の実施例１に係る回転切削工具用切削ヘッドを使用していれば加工をしている状態の斜視図である。It is a perspective view of the state currently processed if the cutting head for rotary cutting tools which concerns on Example 1 of this invention is used. 同切削ヘッドの（ａ）正面図、（ｂ）平面図、（ｃ）矢上断面図、（ｄ）底面図である。It is the (a) front view of the cutting head, (b) top view, (c) arrow top sectional view, (d) bottom view. 従来技術に係る切削ヘッドの（ａ）使用前の正面図、（ｂ）樹脂が絡み付いた状態の正面図である。(A) The front view before use of the cutting head which concerns on a prior art, (b) The front view of the state which resin entangled. 実施例２~５に係る切削ヘッドの各正面図である。FIG. 6 is a front view of each cutting head according to Examples 2 to 5.
　図２に示す実施例１の切削ヘッド１は、図１に示すように回転切削工具のハンドピース２の先端に取り付けられて使用する。 The cutting head 1 of Example 1 shown in FIG. 2 is attached to the tip of a hand piece 2 of a rotary cutting tool as shown in FIG.
　この切削ヘッド１は、ハンドピース２へ取り付ける取付部１１を有する軸部１２と、この軸部１２先端の切削刃部１３からなる。切削刃部１３は先端に向かってやや先細りであり、円錐状の中心体１４から８本ずつ軸方向の溝１５と軸方向の刃１６を有する。軸方向の溝１５と刃１６は図２（ｂ）（ｃ）に見られるように、わずかながら撚りがかかっている。刃１６には浅い波状のギザギザ溝１７が設けられている。 The cutting head 1 includes a shaft portion 12 having a mounting portion 11 attached to the handpiece 2 and a cutting blade portion 13 at the tip of the shaft portion 12. The cutting blade portion 13 is slightly tapered toward the tip, and has eight axial grooves 15 and axial blades 16 from the conical center body 14. The axial grooves 15 and blades 16 are slightly twisted, as can be seen in FIGS. The blade 16 is provided with a shallow wavy jagged groove 17.
　本発明の特徴は、切削刃部１３に周方向のやや深い溝１８を少なくとも１本設けたことである。図２の実施例では先端部近くに周方向の深い溝１８を１本設けられているのが分かる。 A feature of the present invention is that at least one circumferentially slightly deep groove 18 is provided in the cutting blade portion 13. In the embodiment of FIG. 2, it can be seen that one circumferential deep groove 18 is provided near the tip.
　溝１８の深さ、幅、本数、間隔については切削ヘッドの大きさ、使用個所、使用目的により大きく異なる。しかし、あまりに深さが深すぎたり、幅が広すぎたり、本数が増えすぎたりしたら、稼働する刃の部分が少なくなってしまい、切削効率が落ちるだけでなく破損しやすくなるのは明らかである。 The depth, width, number, and interval of the grooves 18 vary greatly depending on the size of the cutting head, the location of use, and the purpose of use. However, it is clear that if the depth is too deep, too wide, or the number of blades increases, the number of blades that operate is reduced, which not only reduces cutting efficiency but also easily breaks. .
　歯科技工に使われる回転切削器具の切削刃部に関する限り、溝の深さは０.２ｍｍ～２.０ｍｍ、好ましくは０.５ｍｍ～１.０ｍｍ、溝幅は表面位置において０.５ｍｍ～２.０ｍｍ、好ましくは１.０ｍｍ～１.５ｍｍであって、従来技術に見られる浅いギザギザ溝１７とは明確に区別できるものである必要がある。本数は幅広の溝の場合、１～３本程度が適当であり、幅狭の溝の場合でも１～５本程度で十分である。 As far as the cutting blade part of a rotary cutting tool used in dental technicians is concerned, the groove depth is 0.2 mm to 2.0 mm, preferably 0.5 mm to 1.0 mm, and the groove width is 0.5 mm to 2.0 mm at the surface position. It should be 0 mm, preferably 1.0 mm to 1.5 mm, and should be clearly distinguishable from the shallow jagged grooves 17 found in the prior art. In the case of a wide groove, about 1 to 3 is appropriate, and in the case of a narrow groove, about 1 to 5 is sufficient.
　図４（ａ）～（ｄ）は、実施例２~５に係る切削ヘッドの各正面図である。それぞれ複数の軸方向の溝と複数の軸方向の刃を有する。実施例２の切削ヘッド１Ｂはミカン型のもので、溝１８Ｂは１本である。実施例３の切削ヘッド１Ｃは気球型のもので、溝１８Ｃは２本である。実施例４の切削ヘッド１Ｄはつぼみ型のもので、溝１８Ｄは３本である。実施例５の切削ヘッド１Ｅも別のつぼみ型のもので、溝１８Ｅは４本である。 4A to 4D are front views of the cutting heads according to Examples 2 to 5, respectively. Each has a plurality of axial grooves and a plurality of axial blades. The cutting head 1B of the second embodiment is a mandarin orange type and has one groove 18B. The cutting head 1C of Example 3 is a balloon type, and there are two grooves 18C. The cutting head 1D of Example 4 is a bud type, and there are three grooves 18D. The cutting head 1E of Example 5 is also another bud type, and has four grooves 18E.
１     切削ヘッド
１Ａ   （従来例）切削ヘッド
１１   取付部
１２   軸部
１３   切削刃部
１３Ａ （従来例）切削刃
１４   中心体
１５   軸方向の溝
１５Ａ （従来例）軸方向の溝
１６   軸方向の切削刃
１６Ａ　（従来例）軸方向の切削刃
１７   ギザギザ溝
１７Ａ　（従来例）ギザギザ溝
１８．１８Ｂ～１８Ｅ　やや深い溝
２     ハンドピース
３     総義歯
３１   口蓋部
３２   樹脂 DESCRIPTION OF SYMBOLS 1 Cutting head 1A (Conventional example) Cutting head 11 Attaching part 12 Shaft part 13 Cutting blade part 13A (Conventional example) Cutting blade 14 Central body 15 Axial groove 15A (Conventional example) Axial groove 16 Axial cutting blade 16A (Conventional example) Axial cutting blade 17 Jagged groove 17A (Conventional example) Jagged groove 18.18B to 18E Slightly deep groove 2 Handpiece 3 Complete denture 31 Palate 32 Resin

Claims (3)

  1. 　回転切削工具のハンドピース（２）へ取り付ける取付部（１１）を有する軸部（１２）と、この軸部先端の切削刃部（１３）からなり、前記切削刃部（１３）が複数の軸方向の溝（１５）と複数の軸方向の刃（１６）を有する切削ヘッド（１）において、
    　切削刃部（１３）に周方向のやや深い溝（１８，１８Ｂ～１８Ｅ）を少なくとも１本設けることにより、切削中の発熱を抑制させたことを特徴とする回転切削工具用切削ヘッド。     A shaft portion (12) having an attachment portion (11) to be attached to the handpiece (2) of the rotary cutting tool and a cutting blade portion (13) at the tip of the shaft portion, the cutting blade portion (13) having a plurality of shafts. In a cutting head (1) having a directional groove (15) and a plurality of axial blades (16),
    A cutting head for a rotary cutting tool characterized in that heat generation during cutting is suppressed by providing at least one circumferentially slightly deep groove (18, 18B to 18E) in the cutting blade (13).
  2. 　前記切削ヘッド（１）が歯科技工に使われる回転切削器具に用いるものである請求項１記載の切削ヘッド。 The cutting head according to claim 1, wherein the cutting head (1) is used for a rotary cutting instrument used in a dental technician.
  3. 　溝の深さが０.２ｍｍ～２.０ｍｍ、溝幅が表面位置において０.５ｍｍ～２　.０ｍｍ、本数が１～５本である請求項２記載の切削ヘッド（１）。 The cutting head (1) according to claim 2, wherein the groove depth is 0.2 mm to 2.0 mm, the groove width is 0.5 mm to 2.0 mm at the surface position, and the number is 1 to 5.
PCT/JP2016/058743 2015-03-19 2016-03-18 Cutting head for rotary cutting tool WO2016148284A1 (en)

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JP2015-055744 2015-03-19
JP2015055744A JP2016174666A (en) 2015-03-19 2015-03-19 Cutting head for rotary cutting tool

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102085108B1 (en) * 2019-05-31 2020-03-05 함현수 Dental grooves bur with possible grinding various angles
JP6829360B1 (en) * 2019-12-26 2021-02-10 合同会社Ｗｓｐｔジャパン Cutting / polishing bar

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429504A (en) * 1991-05-21 1995-07-04 Peltier; Patrick Twist drills for bone surgery, in particular for dental surgery
US6179616B1 (en) * 1998-05-27 2001-01-30 Gebr. Brasseler Gmbh & Co. Kg Dental drill
US20090048602A1 (en) * 2007-08-15 2009-02-19 O'donoghue Denis Surgical bur with unequally spaced flutes, flutes with different rake angles and flutes with alternating reliefs
US20090053674A1 (en) * 2007-08-22 2009-02-26 Gebr. Brasseler Gmbh & Co. Kg Dental drill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429504A (en) * 1991-05-21 1995-07-04 Peltier; Patrick Twist drills for bone surgery, in particular for dental surgery
US6179616B1 (en) * 1998-05-27 2001-01-30 Gebr. Brasseler Gmbh & Co. Kg Dental drill
US20090048602A1 (en) * 2007-08-15 2009-02-19 O'donoghue Denis Surgical bur with unequally spaced flutes, flutes with different rake angles and flutes with alternating reliefs
US20090053674A1 (en) * 2007-08-22 2009-02-26 Gebr. Brasseler Gmbh & Co. Kg Dental drill

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