JPS6399856A - Cutting tool - Google Patents
Cutting toolInfo
- Publication number
- JPS6399856A JPS6399856A JP28199386A JP28199386A JPS6399856A JP S6399856 A JPS6399856 A JP S6399856A JP 28199386 A JP28199386 A JP 28199386A JP 28199386 A JP28199386 A JP 28199386A JP S6399856 A JPS6399856 A JP S6399856A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- working part
- cutting tool
- cutting
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 title claims description 99
- 239000006061 abrasive grain Substances 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000010432 diamond Substances 0.000 claims description 7
- 230000007423 decrease Effects 0.000 description 8
- 238000009713 electroplating Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 229910003460 diamond Inorganic materials 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Landscapes
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は切削工具、特に歯牙または歯の修復物の切削に
使用する歯科用切削工具に関するものであり、その他の
材料の切削のための工具用切削工具にも供し得るもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to cutting tools, particularly dental cutting tools used for cutting teeth or dental restorations, and tools for cutting other materials. It can also be used as a cutting tool.
一般に歯科用切削工具は球状2円柱状2円錐状。 Dental cutting tools are generally shaped like two spheres, two cylinders, and two cones.
車軸状など種々の形状に成型加工された基体の作業部に
天然または人工のダイヤモンド砥粒や酸化アルミニウム
砥粒やカーボランダム砥粒などの硬質砥粒を電気めっき
法または鑞付法によって固着せしめて作製され、これを
歯科用タービンまたは歯科用エンジンに装着して高速で
回転させ、同時に注水若しくは霧状の水で冷却しながら
使用されている。Hard abrasive grains such as natural or artificial diamond abrasive grains, aluminum oxide abrasive grains, or carborundum abrasive grains are fixed to the working part of the base body, which is molded into various shapes such as the shape of an axle, by electroplating or brazing. It is then installed in a dental turbine or engine and rotated at high speed, while being cooled with water injection or mist water.
このような歯科用切削工具を用いて効率良く切削するこ
とは、歯科医並びに患者にとって好ましいことではある
が、そのためには
■ 切削工具の切削能力が優れていること。Efficient cutting using such dental cutting tools is desirable for dentists and patients, but in order to do so, (1) the cutting tool must have excellent cutting ability.
■ 切削に伴なう歯牙または歯の修復物の切削屑の排出
が良好に行なわれること、
■ 歯牙または歯の修復物と切削工具基体の作業部とに
発生する切削に伴なう熱の排除が良好に行なわれること
、
が必要である。■ Good discharge of cutting debris from the tooth or tooth restoration caused by cutting; ■ Elimination of heat generated by cutting between the tooth or tooth restoration and the working part of the cutting tool base. It is necessary that this is done well.
現在この条件を満足させるために歯科用切削工具が種々
提案されている。Currently, various dental cutting tools have been proposed to satisfy this condition.
即ち、基体作業部の外周表面に基体作業部の軸線に対し
て軽度に右巻き螺旋状の3つの溝を有するもの、特開昭
56−31744号に開示されているような左右対称の
横断面が6角形をしたソロパン珠状を成したものを積み
上げた形状にして溝を付したもの、または特表昭58−
500280号に開示されているような左ねじ条の溝を
有するものなどがある。That is, one having three slightly right-handed helical grooves with respect to the axis of the base working part on the outer peripheral surface of the base working part, and a symmetrical cross section as disclosed in JP-A No. 56-31744. Hexagonal Solopan bead-shaped ones stacked and grooved, or special edition 1984-
There are those having a left-handed threaded groove as disclosed in Japanese Patent No. 500280.
上記第1の形状の切削工具では3つの溝によって良好な
切削能力と良好な切削屑の排出及び良好な熱の排除を行
なうことを、上記第2及び第3の形状の切削工具では良
好な切削Hの排出及び良好な熱の排除を行なうことを夫
々企図しているのである。In the cutting tool of the first shape, the three grooves provide good cutting ability, good discharge of cutting waste, and good removal of heat, and the cutting tools of the second and third shapes have good cutting performance. It is intended to provide a good H discharge and a good heat rejection, respectively.
しかしながら前述の各切削工具には次のような問題点が
ある。However, each of the cutting tools described above has the following problems.
第1の形状の基体作業部の外周表面に基体作業部の軸線
に対して軽度に右巻き螺旋状の3つの溝を有する切削工
具はその基体作業部の外径が大きい場合には優れた切削
能力を有するが、基体作業部の外径が小さい場合には3
つの溝の存在によって切削工具基体作業部に占める硬質
砥粒固着部の面積の割合が小さくなり、歯牙または歯の
修復物と接触する面積も小さくなり切削能力が劣り、こ
の傾向は低荷重時の方が著しい。A cutting tool having three slightly right-handed helical grooves with respect to the axis of the base working part on the outer circumferential surface of the base working part of the first shape has excellent cutting ability when the outer diameter of the base working part is large. capacity, but if the outer diameter of the base working part is small, 3
Due to the presence of two grooves, the proportion of the hard abrasive adhesion area in the working part of the cutting tool base decreases, and the area in contact with the tooth or tooth restoration also decreases, resulting in poor cutting ability. It's more noticeable.
また、第2の形状の左右対称の横断面が6角形をしたソ
ロパン珠状を成したものを積み上げた形状にして溝を付
した切削工具では、平坦な歯牙または歯の修復物を切削
する際には之と接触する硬質砥粒固着部の面積が小さい
ため切削能力が劣るばかりでなく、切削箇所が溝状に加
工されるため再度溝の無い通常の切削工具を用いて該溝
状に加工された部分を調整する必要がある。In addition, when cutting flat teeth or dental restorations, a cutting tool with grooves formed by stacking Solopan bead-like shapes with a hexagonal symmetrical cross section of the second shape is difficult to cut when cutting flat teeth or tooth restorations. Not only is the cutting ability inferior due to the small area of the hard abrasive particles that come into contact with the surface, but also the cutting part is machined into a groove shape, so it is necessary to use a normal cutting tool without grooves to machine the groove shape again. It is necessary to adjust the parts that have been
更に、第3の形状の左ねじ条の溝を有する切削工具では
、溝の幅と硬質砥粒固着部の幅とが大略等しいため、歯
牙または歯の修復物に接触する硬質砥粒固着部の面積が
ほぼ1/2となり、同じ回転数では切削能力が劣るなど
の欠点を有している。Furthermore, in a cutting tool having a left-handed threaded groove of the third shape, the width of the groove and the width of the hard abrasive-fixed portion are approximately equal, so that the hard abrasive-fixed portion that contacts the tooth or tooth restoration is The area is reduced to approximately 1/2, and the cutting ability is inferior at the same rotation speed.
本発明に係る歯科用切削工具は、切削能力が優れている
と同時に良好な切削屑の排出並びに良好な熱の排除を行
なうものであり、この目的を達成するために基体の作業
部の外周表面に右巻き螺旋状のみの溝が形成され且つ該
溝を除く外周面には硬質砥粒が固着されている硬質砥粒
固着部が形成されている切削工具であって、基体の作業
部の軸線に対して直角な断面の直径をDとするとその断
面における該溝の幅の総和が基体の作業部の先端側の終
点部分を除いて(1150〜215) XπDの範囲内
にあることを特徴とする。The dental cutting tool according to the present invention has excellent cutting ability, and at the same time, is capable of efficiently discharging cutting waste and discharging heat. A cutting tool in which a right-handed spiral groove is formed, and a hard abrasive grain fixing part is formed on the outer circumferential surface other than the groove, and hard abrasive grains are fixed to the outer circumferential surface, and the axis of the working part of the base body is If the diameter of a cross section perpendicular to D is D, the total width of the groove in that cross section is within the range of (1150 to 215) do.
この構成による溝と硬質砥粒固着部とが連続的に交互に
接触すること及び基体作業部が基体作業部の軸線に対し
て直角な断面の直径をDとするとその断面における硬質
砥粒を固着されていない溝の幅の総和が基体作業部先端
側の終点部分を除いて(1150〜215) XπDの
範囲内にあるように形成されているために各断面におい
て優れた切削能力と良好な切削Hの排出及び熱の排除と
が行なわれるのである。この切削作業によって歯牙また
は歯の修復物が溝状に加工されることがなく、再度、溝
の無い通常の切削工具を用いて調整する必要も無い利点
を有している。With this configuration, the grooves and the hard abrasive fixing parts are in continuous and alternate contact with each other, and if the diameter of the cross section of the base working part perpendicular to the axis of the base working part is D, the hard abrasive grains in that cross section are fixed. Except for the end point on the tip side of the base working part, the total width of the grooves is within the range of (1150 to 215) H is discharged and heat is removed. This cutting operation has the advantage that the tooth or tooth restoration is not processed into a groove shape, and there is no need for adjustment using an ordinary cutting tool without grooves.
以下、本発明に係る歯科用切削工具について図面に示す
実施例に基づいて詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A dental cutting tool according to the present invention will be described in detail below based on embodiments shown in the drawings.
第1図は本発明に係る切削工具の1実施例の側面図、第
2図は第1図中のA−AM端面拡大図、第3図は本発明
に係る切削工具の他の実施例の側面図、第4図は第3図
中のB−B線端前拡大図、第5図は本発明に係る切削工
具の他の実施例の側面図、第6図は第5図中のC−C線
端前拡大図である。FIG. 1 is a side view of one embodiment of the cutting tool according to the present invention, FIG. 2 is an enlarged view of the A-AM end face in FIG. 1, and FIG. 3 is a side view of another embodiment of the cutting tool according to the present invention. A side view, FIG. 4 is an enlarged front view taken along the line B-B in FIG. 3, FIG. 5 is a side view of another embodiment of the cutting tool according to the present invention, and FIG. - It is an enlarged view of the C line end front.
図面中、1は加工性が良好で高速切削作業に耐え得る強
度を有する鋼線から加工された基体であって、耐食性の
良好なステンレス鋼線が望ましい。In the drawings, reference numeral 1 denotes a base body machined from a steel wire having good workability and strength enough to withstand high-speed cutting work, preferably stainless steel wire having good corrosion resistance.
2は基体1の作業部であり、その形状は基本的には円錐
形2円筒形、または球形であるが、これらの他にこれら
を組合せた形状を成していても良い。Reference numeral 2 denotes a working part of the base body 1, and its shape is basically a conical shape, a cylindrical shape, or a spherical shape, but it may also have a shape that is a combination of these shapes.
3は基体1の作業部2の外周表面に形成されている1条
または2条以上の右巻き螺旋状のみの溝であり、この溝
3の断面形状は半円状やV字型の他にU字型でも切削能
力、切削屑の排出及び熱の排除に有効に作用し得る形状
であれば種々の形状を採用することができる。4は基体
1の作業部2の外周表面の溝3を除く外周面に固着され
ている天然または人工のダイヤモンドや酸化アルミニウ
ムやカーボランダムや立方晶窒化ホウ素やTiC系。Reference numeral 3 denotes one or more right-handed spiral grooves formed on the outer circumferential surface of the working part 2 of the base body 1, and the cross-sectional shape of the grooves 3 may be semicircular or V-shaped. Even if it is U-shaped, various shapes can be adopted as long as they can effectively improve cutting ability, discharge cutting debris, and eliminate heat. 4 is a natural or artificial diamond, aluminum oxide, carborundum, cubic boron nitride, or TiC-based material fixed to the outer peripheral surface of the working part 2 of the base 1 except for the groove 3.
ZrO,系、Si、N、系セラミックス等の硬質砥粒が
固着されている硬質砥粒固着部であり、この硬質砥粒の
固着には一般に第1図及び第2図の実施例や第5図及び
第6図の実施例の如くニッケルまたはクロムの電気めっ
き法が利用されるが、第3図及び第4図の実施例の如く
鑞付法を用いても良いし、または併用してもよい、5は
基体1の作業部2の根元と柄部との間に設けられている
ネック部である。This is a hard abrasive fixing part to which hard abrasive grains such as ZrO, Si, N, ceramics, etc. are fixed. Although nickel or chromium electroplating is used as in the embodiments shown in Figures 3 and 6, brazing methods may also be used as in the embodiments shown in Figures 3 and 4, or in combination 5 is a neck portion provided between the base of the working portion 2 of the base body 1 and the handle portion.
右巻き螺旋状の溝3の形成は、基体1の作業部2に硬質
砥粒を固着せしめる前に基体1の作業部2の外周表面に
機械的に右巻き螺旋状の溝3を形成し、この溝3を絶縁
した後、溝3を除く外周面に電気めっき法を用いて硬質
砥粒を固着せしめることが一番簡易な方法であるが、基
体1の作業部2に硬質砥粒を固着せしめる前に基体1の
作業部2の外周表面に右巻き螺旋状の絶縁部を形成して
。The right-handed spiral groove 3 is formed by mechanically forming the right-handed spiral groove 3 on the outer peripheral surface of the working part 2 of the base 1 before fixing the hard abrasive grains to the working part 2 of the base 1, After insulating this groove 3, the simplest method is to use electroplating to fix hard abrasive grains to the outer peripheral surface excluding the groove 3. Before this, a right-handed spiral insulation part is formed on the outer peripheral surface of the working part 2 of the base body 1.
この絶縁部を除く外周面に電気めっき法を用いて硬質砥
粒を固着せしめることもできる。また、基体1の作業部
2に硬質砥粒を電気めっき法または鑞付法を用いて固着
せしめた後に、基体1の作業部2の外周表面を機械的に
右巻き螺旋状に加工することによって溝3を形成するこ
とも可能である。Hard abrasive grains can also be fixed to the outer circumferential surface excluding the insulating portion by electroplating. Further, after fixing hard abrasive grains to the working part 2 of the base body 1 using an electroplating method or a brazing method, the outer peripheral surface of the working part 2 of the base body 1 is mechanically processed into a right-handed spiral shape. It is also possible to form grooves 3.
また溝3の幅Wは基本的には同じ大きさの幅を呈してい
ることが望ましいが、必ずしも溝3の全長に亘って同じ
大きさの幅であることに限定されるものではない。例え
ば基体1の作業部2の形状が円錐形である場合、基体1
の作業部2の先端に溝3を形成することが加工上困難で
あり、また切削能力の低下を招くため先端部における溝
3の幅Wは先端に向かって徐々に狭くする必要がある。Although it is desirable that the width W of the groove 3 is basically the same, it is not necessarily limited to the same width over the entire length of the groove 3. For example, if the shape of the working part 2 of the base 1 is conical, the base 1
It is difficult in machining to form the groove 3 at the tip of the working part 2, and also leads to a decrease in cutting ability, so the width W of the groove 3 at the tip needs to be gradually narrowed toward the tip.
この場合には切削Hの排出にも効果がある。また。In this case, it is also effective to discharge the cutting H. Also.
基体作業部の形状が球形である場合には先端部付近は周
速が小さく5先端部の溝3による切削能力の効果が無い
ため先端部における溝3の幅Wは先端に向かって徐々に
狭くすることが好ましい、硬質砥粒を固着していない溝
3の幅Wは、基体1の作業部2の軸線に対して直角な断
面の直径をDとするとその断面における溝3の幅Wの総
和Wが。When the shape of the base working part is spherical, the circumferential speed near the tip is small and the cutting ability of the groove 3 at the tip is not effective, so the width W of the groove 3 at the tip gradually narrows toward the tip. The width W of the grooves 3 to which hard abrasive grains are not fixed is preferably the sum of the widths W of the grooves 3 in the cross section perpendicular to the axis of the working part 2 of the base body 1, where D is the diameter of the cross section. W is.
基体1の作業部2の先端側の終点部分を除いてその横断
面の外周長の半分以下である(1150〜2/5)×D
の範囲内にあることが必要である。溝3の幅Wが、基体
1の作業部2の軸線に対して直角な断面の直径をDとす
るとその断面における溝3の幅Wの総和Wが基体1の作
業部2の先端側の終点部分を除いて(1150) X
yc D未満であると、)虜3と硬質砥粒固着部4の連
続的交互接触による効果が無くなり、切削能力の低下を
招くと共に切削屑の排出及び熱の排除が困難になる。ま
た、溝3の幅Wが、基体1の作業部2のFill線に対
して直角な断面の直径をDとするとその断面における溝
3の幅Wの総和Wが基体1の作業部2の先端側の終点部
分を除いて(215) x yc Dを超えると、基体
1の作業部2に占める硬質砥粒固着部4の面積の割合が
小さくなり、切削屑の排出及び熱の排除は容易になるが
切削能力が低下して好ましくないのである。The length of the outer circumference of the cross section of the base 1 excluding the end point on the tip side of the working part 2 is less than half (1150 to 2/5)×D
It is necessary to be within the range of . The width W of the groove 3 is the diameter of a cross section perpendicular to the axis of the working part 2 of the base body 1 as D. Except for the part (1150)
If yc is less than D, the effect of continuous alternate contact between the caps 3 and the hard abrasive grain fixing portions 4 will be lost, leading to a decrease in cutting ability and making it difficult to discharge cutting debris and heat. Further, if the width W of the groove 3 is the diameter of a cross section perpendicular to the Fill line of the working part 2 of the base body 1, then the sum W of the width W of the groove 3 in that cross section is the tip of the working part 2 of the base body 1. When (215) x yc D is exceeded except for the end point of the side, the ratio of the area of the hard abrasive grain adhering part 4 to the working part 2 of the base body 1 becomes small, and it becomes easy to discharge cutting waste and eliminate heat. However, this is undesirable because the cutting ability decreases.
基体1の作業部2の軸線に対する傾斜角θは、特に切削
能力に影響を与える因子であり、傾斜角0が06または
0°に近い場合には切削能力は特に優れているが、歯牙
または歯のイ^復物に対して大きな衝撃を与えるため患
者に苦癌を与えてしまうことになり、この傾向は傾斜角
θが大きくなる程小さくなるがこの傾向は傾斜角0が5
°になるまで続くが、傾斜角θが5°〜60°の範囲内
では歯牙または歯の修復物に対する衝撃は低く抑えられ
、切削能力も優れている。また、傾斜角θが60°を超
えると切削能力は低下する。従って基体1の縦軸方向に
対する傾斜角θは5°〜60°の範囲内にあることが好
ましい。なお、この傾斜角θは作業部2の全長に亘って
一定にすることが好ましいが。The inclination angle θ of the base body 1 with respect to the axis of the working part 2 is a factor that particularly affects the cutting ability, and when the inclination angle 0 is close to 06 or 0°, the cutting ability is particularly excellent. This gives a large impact to the reconstruction, causing pain to the patient, and this tendency decreases as the inclination angle θ becomes larger.
However, when the inclination angle θ is within the range of 5° to 60°, the impact on the tooth or tooth restoration is suppressed to a low level, and the cutting ability is excellent. Moreover, when the inclination angle θ exceeds 60°, the cutting ability decreases. Therefore, it is preferable that the inclination angle θ of the base body 1 with respect to the longitudinal axis direction is within the range of 5° to 60°. Note that it is preferable that this inclination angle θ is constant over the entire length of the working section 2.
第5図に示す実施例のように作業部2の長さが長いため
にネック部5の長さを長くすることができず、その結果
基体1の作業部2の外周表面に機械的に右巻き螺旋状の
溝3を形成する際に基体1の柄部にまで溝を形成する恐
れがある場合などには作業部2の柄部側の部分だけ傾斜
角θを60°以下の角度の範囲内で大きくすることも差
支えない。As shown in the embodiment shown in FIG. 5, since the length of the working part 2 is long, the length of the neck part 5 cannot be increased. When forming the spiral groove 3, if there is a possibility that the groove will extend to the handle of the base body 1, the inclination angle θ may be set within a range of 60° or less only on the handle side of the working part 2. There is no problem in increasing the size within the room.
硬質砥粒を固着していない溝3の条数も切削能力、切削
屑の排出及び熱の排除に大きく影響を与える因子である
。第1図に示す切削工具の場合。The number of grooves 3 to which hard abrasive grains are not fixed is also a factor that greatly influences cutting ability, discharge of cutting waste, and removal of heat. In the case of the cutting tool shown in FIG.
溝3の条数は2木であるが、条数が3本以上になると切
削Hの排出及び熱の排除は良くなるが基体1の作業部2
の外径が小さく、外周が短い場合、基体1の作業部2に
占める硬質砥粒固着部4の面積が小さくなり、歯牙また
は歯の修復物と接触する面積も小さくなり切削能力が劣
る。この傾向は低荷重時の方が著しい。よって溝3の条
数は基本的には2本が望ましいが、第3図及び第5図に
示す切削工具の如く第1−図に示す切削工具よりも作業
部の長さも長く、基体1の作業部2の基本的形状が円錐
形である場合には溝3の条数が2本であると作業部2の
中央部から先端部にかけて基体1の作業部2の外径が小
さくなり、基体1の作業部2に占める硬質砥粒固着部4
の面積が小さくなり歯牙または歯の修復物と接触する面
積も小さくなり作業部2の中央部から先端部にかけての
切削能力が劣るため、作業部2の中央部から先端部にか
けては溝3の条数を1本にすることが好ましい。The number of grooves 3 is 2, but if the number of grooves is 3 or more, the discharge of cutting H and heat will be better.
If the outer diameter is small and the outer circumference is short, the area of the hard abrasive fixing part 4 occupying the working part 2 of the base body 1 becomes small, and the area in contact with the tooth or tooth restoration is also small, resulting in poor cutting ability. This tendency is more pronounced when the load is low. Therefore, it is basically desirable that the number of grooves 3 is two, but the length of the working part is longer than that of the cutting tool shown in FIGS. When the basic shape of the working part 2 is conical, if the number of grooves 3 is two, the outer diameter of the working part 2 of the base 1 becomes smaller from the center to the tip of the working part 2, and the base Hard abrasive fixed part 4 occupying working part 2 of 1
The area of the groove 3 is smaller and the area in contact with the tooth or tooth restoration is also smaller, and the cutting ability from the center to the tip of the working part 2 is inferior. It is preferable to set the number to one.
また本発明に係る歯科用切削工具の使用目的は歯牙また
は歯の修復物の切削であり、固着される硬質砥粒はヌー
プ硬さで340付近の歯牙エナメル質またはヌープ硬さ
で30〜150の歯の修復物を切削せしめるに必要な硬
度を持てば特に限定するものではないが、切削能力及び
耐久性の点で特に天然または人工のダイヤモンドが優れ
ており、これらを使用することが望ましい。Further, the purpose of use of the dental cutting tool according to the present invention is to cut teeth or tooth restorations, and the hard abrasive grains to be fixed are tooth enamel with a Knoop hardness of around 340 or a Knoop hardness of 30 to 150. Although there is no particular limitation as long as it has the hardness necessary to cut the dental restoration, natural or artificial diamonds are particularly excellent in terms of cutting ability and durability, and it is desirable to use these.
第1図に示す切削工具は、基体1の作業部2の外周表面
に基体1の軸線に対する傾斜角θが30゜の右巻き螺旋
状で軸線に対して直角な断面での幅Wがそれぞれ0.3
5mmで、基体1の作業部2の先端側の終点部分を除い
て外周長さの1110〜115の幅〔溝3の幅Wの総和
Wが(115〜215) X πDに相当〕の2条の半
円状の溝3が形成されており、溝3を除く外周面に天然
ダイヤモンド砥粒を電気めっき法を用いて固着せしめた
硬質砥粒固着部4を形成した歯科用切削工具である。The cutting tool shown in FIG. 1 has a right-handed helical shape on the outer circumferential surface of a working part 2 of a base body 1 with an inclination angle θ of 30° to the axis of the base body 1, and a width W in a cross section perpendicular to the axis is 0. .3
5 mm, and two grooves with a width of 1110 to 115 of the outer circumferential length excluding the end point on the tip side of the working part 2 of the base body 1 [the total width W of the groove 3 corresponds to (115 to 215) X πD] This dental cutting tool has a semicircular groove 3 formed therein, and a hard abrasive grain fixing part 4 formed with natural diamond abrasive grains fixed by electroplating on the outer peripheral surface except for the groove 3.
また、第3図に示す切削工具は、基体1の作業部2の外
周表面に基体】、の軸線に対する傾斜角θが10°の右
巻き螺旋状で軸線に対して直角な断面での幅Wがそれぞ
れ0.25nmで、基体1の作業部2の先端側の終点部
分を除いて外周長さの3750〜7150の幅のV字状
の溝3を作業部の先端から中央部まで1条、中央部から
作業部の根元まで2条〔溝3の幅Wの総和Wが(615
0〜14150) X yc Dに相当〕形成されてお
り、溝3を除く外周面に人工のダイヤモンド砥粒を鑞着
法を用いて固着せしめた硬質砥粒固着部4を形成した歯
科用切削工具である。The cutting tool shown in FIG. 3 has a right-handed helical shape with an inclination angle θ of 10 degrees to the axis of the base body 1, and a width W in a cross section perpendicular to the axis line. is 0.25 nm each, and one V-shaped groove 3 with a width of 3750 to 7150 mm of the outer circumference excluding the end point on the tip side of the working part 2 of the base 1 from the tip to the center of the working part, 2 grooves from the center to the base of the working part [the total width W of the groove 3 is (615
0 to 14150) corresponding to It is.
更に第5図に示す切削工具は、基体1の作業部2の外周
表面に基体1の軸線に対する傾斜角0が作業部2の先端
から根元より1m手前までが30゛で根元より1ms+
手前から根元までが50°の右巻き螺旋状で軸線に対し
て直角な断面での幅Wがそれぞれ0.45mで、基体1
の作業部2の先端側の終点部分を除いて外周長さの41
50〜9150の幅の溝3を作業部の先端から中央部ま
で1条、先端付近から作業部の根元まで2条の溝3〔溝
3の幅Wの総和Wが(8150〜18150) xπD
に相当〕が形成されており、溝3を除く外周面に人工の
ダイヤモンド砥粒を電気めっき法を用いて固着せしめた
硬質砥粒固着部4を形成した歯科用切削工具である。Furthermore, in the cutting tool shown in FIG. 5, the inclination angle 0 with respect to the axis of the base 1 on the outer peripheral surface of the working part 2 of the base 1 is 30° from the tip of the working part 2 to 1 m before the root, and 1 ms + from the root.
It has a right-handed spiral shape with an angle of 50° from the front to the base, and the width W in the cross section perpendicular to the axis is 0.45 m, and the base 1
Excluding the end point on the tip side of the working part 2, the outer circumference length is 41
There is one groove 3 with a width of 50 to 9150 mm from the tip to the center of the working part, and two grooves 3 from the vicinity of the tip to the base of the working part [the total width W of the groove 3 is (8150 to 18150) xπD
This dental cutting tool has a hard abrasive grain fixing part 4 formed with artificial diamond abrasive grains fixed by electroplating on the outer peripheral surface except for the groove 3.
上述した如き構造の本発明に係る歯科用切削工具は、基
体1の作業部2の外周表面に右巻き螺旋状のみの溝3が
形成されRつ該溝3を除く外周面には硬質砥粒が固着さ
れている硬質砥粒固着部4が形成されている切削工具で
あって、基体1の作業部2の軸線に対して直角な断面の
直径をDとするとその断面における該溝3の幅Wの総和
Wが。The dental cutting tool according to the present invention having the above-described structure has a right-handed spiral groove 3 formed on the outer circumferential surface of the working part 2 of the base body 1, and hard abrasive grains on the outer circumferential surface except for the groove 3. is a cutting tool in which a hard abrasive grain fixing part 4 is formed, and if the diameter of a cross section perpendicular to the axis of the working part 2 of the base body 1 is D, the width of the groove 3 in that cross section is The sum of W is W.
基体1の作業部2の先端側の終点部分を除いて(115
0〜215) XπDの範囲内にあるものであり、歯科
用タービンまたは歯科用エンジンに装着して窩洞形成ま
たは支台歯形成を行なうものである。Except for the end point on the tip side of the working part 2 of the base body 1 (115
0 to 215) is within the range of
このような本発明に係る歯科用切削工具は、基体1の作
業部2の外周表面に右巻き螺旋状のみの溝3を形成しこ
の溝3を除く外周面に硬質砥粒を固着された硬質砥粒固
着部4が形成せしめられているため、歯牙または歯の修
復物の切削時の切削性または切削感はその螺旋状稙造の
ために砥石よりも歯科用バーに近い方向性を有している
ので、切削工具の回転方向を調節できない歯科用タービ
ンの場合、従来の形成法に慣れている歯科医にとって従
来の歯科用バー特にカーバイドバーと同じ螺旋の方向が
右巻きであることは非常に重要で、螺旋方向の違いから
歯牙または歯の修復物に深く切込んで歯牙を傷付けたり
、従来の形成法と異なる形成法を身に着けるということ
をする必要が無く、従来と全く同じ形成法を使用するこ
とができるのである。Such a dental cutting tool according to the present invention has a right-handed helical groove 3 formed on the outer circumferential surface of the working part 2 of the base body 1, and a hard abrasive grain is fixed to the outer circumferential surface excluding the groove 3. Since the abrasive grain fixing portion 4 is formed, the cutting performance or cutting feeling when cutting a tooth or dental restoration has a directionality closer to that of a dental bur than that of a grindstone due to its spiral structure. Therefore, in the case of dental turbines in which the direction of rotation of the cutting tool cannot be adjusted, it is very difficult for dentists who are accustomed to conventional forming methods to have a right-handed helical direction, which is the same as that of conventional dental burs, especially carbide burs. Because of the difference in the helical direction, there is no need to cut deeply into the tooth or tooth restoration and damage the tooth, or to learn a different preparation method than the conventional one. law can be used.
以上詳述した如き本発明に係る歯科用切削工具は、従来
から存在している作業部の軸線に対する傾斜角が軽度に
右巻き螺旋状の3つの溝を有する切削工具や横断面が6
角形をしたソロパン珠状を成したものを積み上げた形状
にして溝を付した切削工具や左ねじ条の溝を有する切削
工具の欠点であった切削能力の低下を改善するもので、
特に基体の作業部の外径が小さい場合の低荷重時の切削
能力の低下が殆ど生ぜず、高荷重時においても高い切削
能力を有しているのであり、また歯牙または歯の修復物
を切削する際に歯牙または歯の修復物が溝状に加工され
ることが無いばかりか切削面の仕上がりが非常に平坦な
ので再度溝の無い通常の切削工具を用いて調整する必要
も無い利点を有しているのである。The dental cutting tool according to the present invention as described in detail above has a conventional cutting tool having three right-handed helical grooves with a slight inclination angle with respect to the axis of the working part, and a cutting tool with a cross section of 6.
This product improves the reduction in cutting ability that was a drawback of cutting tools with grooves formed by stacking square Solopan beads and cutting tools with left-handed thread grooves.
In particular, when the outer diameter of the working part of the base is small, there is almost no reduction in cutting ability under low loads, and it has high cutting ability even under high loads, and it can also cut teeth or dental restorations. This has the advantage that not only is the tooth or tooth restoration not machined into a groove shape, but the finished cut surface is very flat, so there is no need to re-adjust it using a normal cutting tool without grooves. -ing
また溝と硬質砥粒固着部の連続的交互接触及びこの連続
的交互接触にもかかわらず切削能力の低下を防止する溝
の幅の総和の選定によって切削屑の排出及び熱の排除が
自動的に行なわれるばかりでなく、歯牙または歯のl!
JtIt物に与えるWRMが低く抑えられているため患
者に苦癌を強いることがないのである。In addition, the continuous alternating contact between the groove and the fixed part of the hard abrasive grains and the selection of the total width of the groove that prevents a decrease in cutting ability despite this continuous alternating contact automatically discharge cutting debris and eliminate heat. Not only is it done, but also teeth or tooth l!
Since the WRM given to the JtIt product is kept low, patients are not forced to suffer from cancer.
以上、本発明に係る歯科用切削工具は歯科治療に貢献す
ること甚大である。As described above, the dental cutting tool according to the present invention greatly contributes to dental treatment.
第1図は本発明に係る切削工具の1実施例の側面図、第
2図は第1図中のA−APjA@而拡大図面第3図は本
発明に係る切削工具の他の実施例の側面図、第4図は第
3図中のB−B縁端面拡大図、第5図は本発明に係る切
削工具の他の実施例の側面図、第6図は第5図中のC−
C線端前拡大図である6
1・・・・基体
2・・・・作業部
3・・・・溝
4・・・・硬質砥粒固着部
5・・・・ネック部
D・・・・作業部2の軸線に対して直角な断面の直径
W・・・・溝3の幅
W・・・・溝3の幅Wの総和FIG. 1 is a side view of one embodiment of the cutting tool according to the present invention, and FIG. 2 is an enlarged view of A-APjA in FIG. 1. FIG. 3 is a side view of another embodiment of the cutting tool according to the present invention. A side view, FIG. 4 is an enlarged view of the B-B edge surface in FIG. 3, FIG. 5 is a side view of another embodiment of the cutting tool according to the present invention, and FIG.
6 which is an enlarged view of the front end of C line 1...Base body 2...Working part 3...Groove 4...Hard abrasive grain fixed part 5...Neck part D... Diameter W of the cross section perpendicular to the axis of the working part 2...Width W of the groove 3...Sum of the width W of the groove 3
Claims (1)
状のみの溝(3)が形成され且つ該溝(3)を除く外周
面には硬質砥粒が固着されている硬質砥粒固着部(4)
が形成されている切削工具であつて、基体(1)の作業
部(2)の軸線に対して直角な断面の直径をDとすると
その断面における該溝(3)の幅(w)の総和(W)が
、基体(1)の作業部(2)の先端側の終点部分を除い
て(1/50〜2/5)×Dの範囲内にあることを特徴
とする切削工具。 2 溝(3)が1条である特許請求の範囲第1項記載の
切削工具。 3 溝(3)が2条である特許請求の範囲第1項記載の
切削工具。 4 硬質砥粒が天然のダイヤモンドである特許請求の範
囲第1項ないし第3項中の何れか1項に記載の切削工具
。 5 硬質砥粒が人工のダイヤモンドである特許請求の範
囲第1項ないし第3項中の何れか1項に記載の切削工具
。 6 溝(3)の傾斜角(θ)が基体(1)の作業部(2
)の軸線方向に対し5°〜60°である特許請求の範囲
第1項ないし第5項中の何れか1項に記載の切削工具。[Claims] 1. A right-handed spiral groove (3) is formed on the outer peripheral surface of the working part (2) of the base (1), and hard abrasive grains are formed on the outer peripheral surface except for the groove (3). Fixed hard abrasive grain part (4)
is formed, and if the diameter of a cross section perpendicular to the axis of the working part (2) of the base body (1) is D, then the sum of the widths (w) of the grooves (3) in that cross section. A cutting tool characterized in that (W) is within the range of (1/50 to 2/5) x D except for the end point on the tip side of the working part (2) of the base (1). 2. The cutting tool according to claim 1, wherein the groove (3) is one groove. 3. The cutting tool according to claim 1, wherein the groove (3) has two grooves. 4. The cutting tool according to any one of claims 1 to 3, wherein the hard abrasive grains are natural diamonds. 5. The cutting tool according to any one of claims 1 to 3, wherein the hard abrasive grains are artificial diamonds. 6 The inclination angle (θ) of the groove (3) is the working part (2) of the base (1).
) 5° to 60° with respect to the axial direction of the cutting tool according to any one of claims 1 to 5.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/038,900 US4834655A (en) | 1986-06-04 | 1987-04-16 | Cutting tools |
CH1853/87A CH672586A5 (en) | 1986-06-04 | 1987-05-14 | |
GB8711647A GB2191126B (en) | 1986-06-04 | 1987-05-18 | Cutting tools |
DE8707113U DE8707113U1 (en) | 1986-06-04 | 1987-05-18 | Cutting tool |
DE19873716580 DE3716580A1 (en) | 1986-06-04 | 1987-05-18 | CUTTING TOOL |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12807986 | 1986-06-04 | ||
JP61-128079 | 1986-06-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6399856A true JPS6399856A (en) | 1988-05-02 |
JPH0438423B2 JPH0438423B2 (en) | 1992-06-24 |
Family
ID=14975902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28199386A Granted JPS6399856A (en) | 1986-06-04 | 1986-11-28 | Cutting tool |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6399856A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6478710A (en) * | 1987-09-21 | 1989-03-24 | Kokutou Dengiyoushiya Kk | Diamond galvanized drill, manufacture thereof and boring method |
JPH0476361U (en) * | 1990-11-09 | 1992-07-03 | ||
JP2009172518A (en) * | 2008-01-24 | 2009-08-06 | Ngk Insulators Ltd | Manufacturing method of perforated honeycomb structure body |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54114888A (en) * | 1978-02-27 | 1979-09-07 | Yoshimitsu Hamada | Diamond or cubic crystalline system boron nitride grind stone provided with spiral grinding surface |
JPS6127665U (en) * | 1984-07-20 | 1986-02-19 | 有限会社 山本工業 | whetstone |
JPS6168865U (en) * | 1984-10-09 | 1986-05-12 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5467252A (en) * | 1977-11-08 | 1979-05-30 | Daikin Ind Ltd | Refrigerating unit |
-
1986
- 1986-11-28 JP JP28199386A patent/JPS6399856A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54114888A (en) * | 1978-02-27 | 1979-09-07 | Yoshimitsu Hamada | Diamond or cubic crystalline system boron nitride grind stone provided with spiral grinding surface |
JPS6127665U (en) * | 1984-07-20 | 1986-02-19 | 有限会社 山本工業 | whetstone |
JPS6168865U (en) * | 1984-10-09 | 1986-05-12 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6478710A (en) * | 1987-09-21 | 1989-03-24 | Kokutou Dengiyoushiya Kk | Diamond galvanized drill, manufacture thereof and boring method |
JPH0476361U (en) * | 1990-11-09 | 1992-07-03 | ||
JP2009172518A (en) * | 2008-01-24 | 2009-08-06 | Ngk Insulators Ltd | Manufacturing method of perforated honeycomb structure body |
Also Published As
Publication number | Publication date |
---|---|
JPH0438423B2 (en) | 1992-06-24 |
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