JPH0445291B2 - - Google Patents
Info
- Publication number
- JPH0445291B2 JPH0445291B2 JP61060150A JP6015086A JPH0445291B2 JP H0445291 B2 JPH0445291 B2 JP H0445291B2 JP 61060150 A JP61060150 A JP 61060150A JP 6015086 A JP6015086 A JP 6015086A JP H0445291 B2 JPH0445291 B2 JP H0445291B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary tool
- inner layer
- outer layer
- layer portion
- key
- 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.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 229910001018 Cast iron Inorganic materials 0.000 claims description 7
- 229910017709 Ni Co Inorganic materials 0.000 claims description 7
- 229910003267 Ni-Co Inorganic materials 0.000 claims description 7
- 229910003262 Ni‐Co Inorganic materials 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 description 22
- 238000003754 machining Methods 0.000 description 7
- 238000003801 milling Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Drilling Tools (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、工作機械に装着されて回転し、被
加工物を加工するフライス、ドリル、タツプ、リ
ーマ、軸付砥石、砥石円盤等の回転工具に関す
る。[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to the rotation of milling cutters, drills, taps, reamers, whetstones with shafts, grindstone discs, etc. that are attached to machine tools and rotate to process workpieces. Regarding tools.
一般に、工作機械の主軸に装着され、回転によ
つて被加工物を切削したり、穴あけするフライス
やドリル等の回転工具は、刃先部とベース部とか
ら構成されている。これらの回転工具について
は、その精度を損わないで工具寿命を延ばすため
に、工具の素材成分自体を検討したり、あるいは
個々の被加工材料に対応して工具の形状や切削条
件を定めるなどの工夫が行われている。すなわ
ち、素材については靱性、耐摩耗性、耐熱性およ
び耐振性等を付与する元素や成分量を定め、さら
にこのような素材によつて製作された回転工具の
刃先部の形状として、被加工材料に対応してすく
い角、にげ角、切れ刃角、ノーズ半径、チゼルや
ウエブ幅、切れ刃のねじれ角等が定められてお
り、また同時に切削条件として切削速度、送り速
度、切り込み、切削油材種等を最適化することに
よつて、工具の長寿命化を図つている。
Generally, a rotary tool such as a milling cutter or drill, which is attached to the main shaft of a machine tool and rotates to cut or drill a hole in a workpiece, is composed of a cutting edge portion and a base portion. For these rotary tools, in order to extend the tool life without sacrificing accuracy, it is necessary to consider the material composition of the tool itself, or to determine the shape and cutting conditions of the tool in accordance with each workpiece material. Efforts are being made. In other words, for the material, the elements and component amounts that provide toughness, wear resistance, heat resistance, vibration resistance, etc. are determined, and the shape of the cutting edge of a rotary tool made of such material is determined based on the workpiece material. The rake angle, rake angle, cutting edge angle, nose radius, chisel and web width, cutting edge helix angle, etc. are determined according to the cutting conditions, and cutting conditions such as cutting speed, feed rate, depth of cut, and cutting oil are determined. By optimizing materials, etc., we aim to extend tool life.
しかしながら、従来の回転工具は、そのベース
部がソリツド形式、すなわち単一体型の円盤状ま
たは中実丸軸状に形成されており、このように構
成された回転工具においては、刃先部の形状や切
削条件を改良しても、加工中における振動をさら
に制振するには限度があり、特に断続的切削加工
時に発生する振動を制振することは限界に来てい
る。しかし他方、振動を制振するために工具のベ
ース部の構造に変化を与えると、工具の寿命を短
命化するおそれがある。
However, the base of conventional rotary tools is formed in a solid form, that is, in the shape of a single disc or a solid round shaft, and in rotary tools configured in this way, the shape of the cutting edge Even if the cutting conditions are improved, there is a limit to further suppressing vibrations during machining, and in particular, the ability to suppress vibrations that occur during intermittent cutting has reached its limit. However, on the other hand, if the structure of the base portion of the tool is changed in order to suppress vibrations, there is a risk that the life of the tool will be shortened.
この発明は、前記事情に着目してなされたもの
で、その目的とするところは、簡単な構成であり
ながら、加工中における振動を減衰させて加工精
度を向上させると同時に、工具寿命の長い回転工
具を提供することにある。 This invention was made in view of the above-mentioned circumstances, and its purpose is to attenuate vibrations during machining to improve machining accuracy, while having a simple structure, and at the same time to improve machining accuracy by increasing tool life. The goal is to provide tools.
この発明は、刃先部とベース部とを具備する回
転工具のベース部を、重量基準でＣ；0.8〜3.0
％、Si；1.0〜3.0％、Ni；25〜40％、Co；4.0〜
6.0％、残部不可避的不純物を含むFeを主成分と
するオーステナイト系Ni−Co合金鋳鉄から成り
所定の半径で径方向に分割した内層部と外層部と
により形成し、この内層部と外層部をキー溝とこ
のキー溝に挿入されるキーとによつて回り止め
し、かつ前記内層部と外層部との間および前記キ
ー溝とキーとの間にそれぞれ3.0〜0.5mmの厚さの
制振結合層を介在させて両者を結合することによ
り、ベース部で外力を吸収して刃先部に加わる衝
撃力を緩和することを特徴とする。
This invention provides a rotary tool having a base portion having a cutting edge portion and a base portion having a C of 0.8 to 3.0 on a weight basis.
%, Si; 1.0~3.0%, Ni; 25~40%, Co; 4.0~
It is made of austenitic Ni-Co alloy cast iron mainly composed of Fe containing 6.0% and the balance unavoidable impurities, and is formed by an inner layer and an outer layer divided radially at a predetermined radius. Rotation is prevented by a key groove and a key inserted into the key groove, and vibration damping is provided between the inner layer part and the outer layer part and between the key groove and the key, each having a thickness of 3.0 to 0.5 mm. By bonding the two with a bonding layer interposed therebetween, the base portion absorbs external force and alleviates the impact force applied to the cutting edge portion.
以下、この発明の実施例を図面に基づいて説明
する。
Embodiments of the present invention will be described below based on the drawings.
第１図及び第２図は第１の実施例を示すもの
で、回転工具としてフライスカツタを示してい
る。このフライスカツタは、実質的に円筒状のベ
ース部１とこのベース部１の下端部に一体的に設
けられた刃先部２，２とから構成されている。上
記ベース部１は所定の半径で径方向に分割された
外層部３と内層部４とにより形成されており、か
つ外層部３と内層部４とはいずれも実質的に円筒
状に形成されている。そして、この外層部３と内
層部４との間には制振結合層５が介在されてい
て、この制振結合層５によつて外層部３と内層部
４とは一体的に結合されている。また、上記ベー
ス部１の上端側に位置する外層部３の内壁および
内層部４の外壁には互いに対向するキー溝３ａ，
４ａが刻設されているとともに、これらキー溝３
ａ，４ａには両者に係合状態にキー６が挿入され
ており、キー溝３ａ，４ａとキー６とによつて外
層部３と内層部４の回り止め部７を構成してい
る。さらに、このキー溝３ａ，４ａとキー６との
間には上記制振結合層５が充填されていて、外層
部３および内層部４に対してキー６が直接接触し
ない構造となつている。 1 and 2 show a first embodiment, in which a milling cutter is shown as the rotary tool. This milling cutter is composed of a substantially cylindrical base portion 1 and cutting edge portions 2, 2 integrally provided at the lower end portion of the base portion 1. The base portion 1 is formed of an outer layer portion 3 and an inner layer portion 4 that are divided in the radial direction at a predetermined radius, and both the outer layer portion 3 and the inner layer portion 4 are formed in a substantially cylindrical shape. There is. A damping coupling layer 5 is interposed between the outer layer section 3 and the inner layer section 4, and the outer layer section 3 and the inner layer section 4 are integrally coupled by the vibration damping coupling layer 5. There is. Further, the inner wall of the outer layer part 3 and the outer wall of the inner layer part 4 located on the upper end side of the base part 1 have key grooves 3a facing each other,
4a are engraved, and these key grooves 3
A key 6 is inserted into both a and 4a in an engaged state, and the key grooves 3a and 4a and the key 6 constitute a rotation preventing portion 7 of the outer layer portion 3 and the inner layer portion 4. Furthermore, the vibration damping coupling layer 5 is filled between the key grooves 3a, 4a and the key 6, so that the key 6 does not come into direct contact with the outer layer portion 3 and the inner layer portion 4.
上記外層部３および内層部の各素材は必ずしも
同一または同種の素材である必要はないが、工具
寿命を長命化するためには実験によれば、特に重
量基準でＣ；0.8〜3.0％、Si；1.0〜3.0％、Ni；
25〜40％、Co；4.0〜6.0％、残不可避的不純物を
含むFeよりなるオーステナイト系Ni−Co合金鋳
鉄、あるいは前記含量範囲のＣ，Si，Ni，Ceの
ほかにMn；2.0％以下、Ｓ；1.0％以下、Ｐ；1.5
％以下を含み、残部不可避的不純物を含むFeよ
りなるオーステナイト系Ni−Co合金鋳鉄を使用
するのが適当であり、さらに熱膨張係数（０〜20
℃）→（２〜３）×10-6／℃、エネルギー損失率
→25〜30％の物理的性質を有するものが特に好ま
しい。 The materials for the outer layer 3 and the inner layer do not necessarily have to be the same or similar materials, but in order to extend the tool life, experiments have shown that C; 0.8 to 3.0%, Si, especially on a weight basis. ;1.0-3.0%, Ni;
Austenitic Ni-Co alloy cast iron consisting of Fe containing 25-40%, Co; 4.0-6.0%, residual unavoidable impurities, or Mn; 2.0% or less in addition to C, Si, Ni, and Ce in the above content range. S: 1.0% or less, P: 1.5
It is appropriate to use an austenitic Ni-Co alloy cast iron consisting of Fe containing less than
Particularly preferred are those having physical properties of (°C)→(2 to 3)×10 −6 /°C and an energy loss rate of 25 to 30%.
また、上記制振結合層５は、一般的に接着性を
有する高分子材料を使用することができるが、特
にエポキシを主成分とするエポキシポリアミド系
樹脂で、つぎの物理的性質を示すものが好まし
い。 In addition, the damping bonding layer 5 can generally be made of a polymeric material having adhesive properties, but in particular, an epoxy polyamide resin containing epoxy as a main component and exhibiting the following physical properties is preferred. preferable.
引張せん断強さτt→10〜20MPa
硬化前の粘度（常温）→30〜40Pa・Ｓ
硬化時の体積収縮率→約2.4％
硬化物の横弾性率→Ｇ＝0.05〜0.2GPa
減衰係数→ｃ＝３〜5MPa・Ｓ
接着剤部分のばね定数→ｋ＝70〜130GN／ｍ
そして、この制振結合層５の厚さは、あまり大
にすると剛性が低下するので、基本的には3.0mm
〜0.5mmの範囲とし、特に好ましくは1.0mm〜0.5mm
でとする。 Tensile shear strength τt → 10 to 20 MPa Viscosity before curing (room temperature) → 30 to 40 Pa・S Volumetric shrinkage during curing → approximately 2.4% Transverse elastic modulus of cured product → G = 0.05 to 0.2 GPa Attenuation coefficient → c = 3 to 5 MPa・S Spring constant of the adhesive part → k = 70 to 130 GN/m The thickness of this damping coupling layer 5 is basically 3.0 mm, since the rigidity will decrease if it is made too large.
~0.5mm, particularly preferably 1.0mm ~ 0.5mm
Detosuru.
つぎに、上述のように構成された回転工具の特
性を、実験の結果にもとづいて説明する。すなわ
ち、つぎに示す範囲の材料を用いて第１図および
第２図に示した構造のベース部を有するフライス
カツタ（以下DO−Ｈという）を10個製作し、実
際に被加工物（SK−３）を切削し、そのフラン
ク摩耗を測定してみた。 Next, the characteristics of the rotary tool configured as described above will be explained based on the results of experiments. That is, 10 milling cutters (hereinafter referred to as DO-H) having the base parts shown in Figures 1 and 2 were manufactured using materials in the range shown below, and the workpiece (SK- 3) was cut and its flank wear was measured.
（内層部及び外層部の材料）
組成：C2.0〜3.0％、Si2.0〜3.0％、
Ni25〜40％、Co5.0〜6.0％、
Mn＜2.0％、Ｓ＜1.0％、Ｐ＜1.5％
物理的性質：熱膨張係数（０〜20℃）→（２×
３）×10-6／℃
エネルギー損失率→27％
引張強さ→10〜20Kgｆ／mm2
ブリネル硬さHB→150〜170
縦弾性係数→8000〜9000
伸び →８％以下
比重 →7.8
（制振結合層の材料）
組成：エポキシを主成分としたエポキシポリア
ミド系樹脂
物理的性質：引張せん断強さτt 10〜15MPa
硬化前の粘度 30〜40Pa・Ｓ
硬化時の体積収縮率 約24％
硬化物の横弾性率Ｇ 0.1GPa
減衰係数ｃ 4.5MPa・Ｓ
接着剤部分のばね定数 100GN／ｍ
比較のため、下記フライスカツタＡ（以下DO
という）およびＢ（以下SK−５という）を用意
し、同じように同一の被加工物（SK−３）を切
削し、同様にフランク摩耗を測定したみた。(Material of inner layer and outer layer) Composition: C2.0-3.0%, Si2.0-3.0%, Ni25-40%, Co5.0-6.0%, Mn<2.0%, S<1.0%, P<1.5 % Physical properties: Coefficient of thermal expansion (0-20℃) → (2×
3)×10 -6 /℃ Energy loss rate → 27% Tensile strength → 10~20Kgf/mm 2 Brinell hardness HB → 150~170 Modulus of longitudinal elasticity → 8000~9000 Elongation → 8% or less specific gravity → 7.8 (vibration damping Bonding layer material) Composition: Epoxy polyamide resin with epoxy as the main component Physical properties: Tensile shear strength τt 10-15 MPa Viscosity before curing 30-40 Pa・S Volume shrinkage during curing Approx. 24% Cured product Transverse elastic modulus G 0.1 GPa Damping coefficient c 4.5 MPa・S Spring constant of adhesive part 100 GN/m For comparison, the following milling cutter A (hereinafter DO
) and B (hereinafter referred to as SK-5) were prepared, the same workpiece (SK-3) was cut in the same way, and flank wear was measured in the same manner.
カツタＡ（DO）
DO−Ｈの内層部および外層部の材料と同一の
材料を用いて製作したものであるが、内層部と外
層部とに分割しないで従来の単一体型に形成した
ベース部を有するもの。Katsuta A (DO) This is manufactured using the same material as the inner and outer layers of DO-H, but the base part is not divided into the inner and outer layers, but is formed into a single body as in the past. Those with
カツタＢ（SK−５）
JIS規格SK−５（C0.80〜0.90％を含む炭素工具
鋼）で示されている材料を用いて、DOと同様に
従来の単一体型に形成したベース部を有するも
の。Katsuta B (SK-5) The base part is made of a material specified by JIS standard SK-5 (carbon tool steel containing 0.80 to 0.90% C) and is formed into a conventional single body like DO. What you have.
第７図は、その測定の結果（DO−Ｈは平均
値）を示したものである。この切削実験は、各カ
ツタDO−Ｈ，DO，SK−５について、切削時間
に対して工具欠損（チツピング）が発生するとこ
ろまでフランク摩耗を追跡したものである。 FIG. 7 shows the results of the measurement (DO-H is the average value). In this cutting experiment, flank wear was tracked for each cutter DO-H, DO, and SK-5 up to the point where tool chipping occurred with respect to cutting time.
DO−Ｈは約40minであるのに対しSK−５が約
20minであるから、DO−Ｈの工具寿命はSK−５
のそれに比較して約２倍に伸びていることがわか
る。また、DOは約30minであるから、DO−Ｈの
工具寿命はDOのそれと比較しても約25％伸びた
ことになる。なお、第７図中２本の同じマークの
曲線は、同一カツタを上限と下限の寿命曲線をプ
ロツトしたものである。While DO-H is about 40min, SK-5 is about
Since it is 20min, the tool life of DO-H is SK-5.
It can be seen that it has grown approximately twice as much as that of . Also, since DO is approximately 30 min, the tool life of DO-H is approximately 25% longer than that of DO. In addition, the two curves with the same mark in FIG. 7 are the upper and lower limit life curves of the same cutter plotted.
第８図はDO−Ｈ，SK−５，DOと、さらにDO
に用いた材料にSiを添加して素材の剛性を高くし
た材料でDO同様に単一体型に形成したベースを
有するカツタ（以下DO（Si）という）、Al−55％
Zn合金でDO同様に単一体型に形成したベースを
有するカツタ（Al−55％Znという）およびDO−
Ｈに用いた材料にSiを添加して素材の剛性を高く
した材料でDO−Ｈ同様の構造に形成したベース
部を有するカツタ（以下DO−Ｈ（Si）という）に
ついて、これら各カツタを使用して被加工物
（SK−３）を切削したときの仕上面粗さの変化を
切削時間に対して示したものである。仕上面粗さ
は、SK−５が最も粗面を呈し、つぎにDO−Ｈ，
DO（Si），Al−55％Znの順に良くなり、DOが最
も細密面を生成する。しかし、これによつても
DO−Ｈは現在一般的に実用されているSK−５と
比較すれば、それ以上に改善向上されるものであ
ることがわかる。 Figure 8 shows DO-H, SK-5, DO, and DO
This cutter (hereinafter referred to as DO (Si)) is made of a material made by adding Si to the material used in the above to increase the rigidity of the material, and has a base formed into a single body like DO (hereinafter referred to as DO (Si)), Al-55%
Cutters (referred to as Al-55%Zn) and DO-
Each of these cutters is used for a cutter (hereinafter referred to as DO-H (Si)) that has a base part formed in a similar structure to DO-H using a material made of material used for H with added Si to increase the rigidity of the material. This figure shows the change in finished surface roughness versus cutting time when a workpiece (SK-3) was cut using the following methods. Regarding the finished surface roughness, SK-5 has the roughest surface, followed by DO-H,
The results are better in the order of DO(Si) and Al-55%Zn, with DO producing the most dense surfaces. However, even with this
When DO-H is compared with SK-5, which is currently in general use, it can be seen that it is even more improved.
第９図は第８図の実験と同一のカツタを用いて
切削したときの単位時間当りの除去体積を切削時
間に対して示したものである。除去速度は約20
mm3／min辺りで変化し、DO−ＨはSK−５に比較
してほとんど変化が認められない。 FIG. 9 shows the volume removed per unit time versus the cutting time when cutting was performed using the same cutter as in the experiment shown in FIG. 8. Removal speed is about 20
It changes at around mm 3 /min, and almost no change is observed in DO-H compared to SK-5.
なお、実験によれば、他に工具材種を超硬工
具、P20，K10，M10，M20およびサーメツトと
変えても前述したこの発明のDO−Ｈの効果は高
く認められ、SK−３以外の材料を切削した場合
にも有効なことが判明している。 In addition, according to experiments, even when the tool material was changed to carbide tools, P20, K10, M10, M20, and cermet, the effectiveness of the DO-H of this invention described above was recognized to be high. It has also been found to be effective when cutting materials.
このように、本実施例によれば、回転工具のベ
ース部１に制振減衰材料であるオーステナイト系
Ni−Co合金鋳鉄を使用し、さらに制振結合層５
として高減衰性を持つ高分子材料の接着剤を介在
させることによつて、加工抵抗を確実に吸収減衰
させる。これによつて、工具に作用する加工抵抗
は小さく抑えることができ、精度と除去能率を一
定に維持した状態で工具寿命を大幅に延ばすこと
ができる。 As described above, according to this embodiment, the base portion 1 of the rotary tool is made of austenitic material which is a vibration damping material.
Ni-Co alloy cast iron is used, and vibration damping bonding layer 5 is used.
Processing resistance can be reliably absorbed and attenuated by interposing a polymeric adhesive with high attenuation properties. As a result, the machining resistance acting on the tool can be kept low, and the tool life can be significantly extended while maintaining constant accuracy and removal efficiency.
第３図および第４図は第２の実施例を示すもの
で、回転工具としてドリルを示したものである。
このドリルはベース部８と刃先部９とからなり、
ベース部８第１の実施例と同様のNi−Co合金鋳
鉄から成りは第１の実施例と同様に径方向に分割
した外層部３と内層部４とから形成され、この外
層部３と内層部４との間に制振結合層５が介在さ
れている。そして、上記ベース部８の上端側に位
置する外層部３の内壁と内層部４の外壁には互い
に対向するキー溝３ａ，４ａが刻設され、これら
キー溝３ａ，４ａにはキー６が挿入されていて、
キー溝３ａ，４ａとキー６との間にも上記制振結
合層が充填されている。さらに、内層部４の下端
部には係合穴１０が設けられ、この係合穴１０に
は上記刃先部９の上端部に突設された係合突起１
１が係合されている。また、係合穴１０と係合突
起１１との間には上記制振結合層５が充填れてお
り、ベース部８に対して刃先部９が一体的に結合
されている。なお、第３図および第４図におい
て、第１の実施例と同一構成部分は同一番号を付
して説明を省略する。 3 and 4 show a second embodiment, in which a drill is shown as the rotary tool.
This drill consists of a base part 8 and a cutting edge part 9,
The base portion 8 is made of Ni-Co alloy cast iron similar to the first embodiment, and is formed of an outer layer portion 3 and an inner layer portion 4 divided in the radial direction as in the first embodiment. A damping coupling layer 5 is interposed between the portion 4 and the portion 4 . The inner wall of the outer layer 3 and the outer wall of the inner layer 4 located on the upper end side of the base portion 8 are provided with key grooves 3a and 4a facing each other, and a key 6 is inserted into these key grooves 3a and 4a. has been,
The vibration damping coupling layer is also filled between the key grooves 3a, 4a and the key 6. Further, an engagement hole 10 is provided at the lower end of the inner layer portion 4, and an engagement protrusion 1 provided in the engagement hole 10 projects from the upper end of the blade edge portion 9.
1 is engaged. Further, the space between the engagement hole 10 and the engagement protrusion 11 is filled with the vibration damping coupling layer 5, and the cutting edge portion 9 is integrally connected to the base portion 8. In FIGS. 3 and 4, the same components as those in the first embodiment are designated by the same numbers, and the explanation thereof will be omitted.
また、第５図は回転工具として回転砥石を、第
６図はリーマをそれぞれ示したもので、第２の実
施例と同様にベース部８と刃先部９とからなり、
そのベース部８は外層部３と内層部４および制振
結合層５によつて構成されている。 Further, FIG. 5 shows a rotary grindstone as a rotary tool, and FIG. 6 shows a reamer, which consists of a base part 8 and a cutting edge part 9 as in the second embodiment.
The base portion 8 is composed of an outer layer portion 3, an inner layer portion 4, and a damping coupling layer 5.
そして、この発明は上記実施例に限定されず、
他の回転工具にも採用することができる。 This invention is not limited to the above embodiments,
It can also be used for other rotating tools.
以上説明したように、この発明によれば、切削
時に生じる振動および断続切削時に生じる衝撃力
を抑止することができ、加工精度、加工速度を向
上させると同時に工具寿命を大幅に延ばすことが
できる。しかも、ベース部を外層部と内層部およ
びこの両者間に介在結合した制振結合層とから構
成したから、簡単な構造であり、廉価に提供でき
るとともに、加工騒音も低減できるという効果も
ある。
As explained above, according to the present invention, it is possible to suppress the vibrations generated during cutting and the impact force generated during intermittent cutting, and it is possible to improve machining accuracy and machining speed, and at the same time, significantly extend tool life. Moreover, since the base part is composed of an outer layer part, an inner layer part, and a vibration-damping coupling layer interposed between the two, the structure is simple and can be provided at a low cost, and processing noise can also be reduced.
第１図はこの発明の第１の実施例を示す斜視
図、第２図は第１図の横断平面図、第３図はこの
発明の第２の実施例を示す縦断側面図、第４図は
第３図の横断平面図、第５図および第６図はこの
発明のそれぞれ異なる実施例を示す側面図、第７
図は切削時間と工具のフランク摩耗との関係を示
す特性線図、第８図は切削時間と各種工具の仕上
面粗さRaとの関係を示す特性線図、第９図は切
削時間に対して各種工具の除去速度を示す特性線
図である。
１……ベース部、２……刃先部、３……外層
部、４……内層部、５……制振結合層。
FIG. 1 is a perspective view showing a first embodiment of the invention, FIG. 2 is a cross-sectional plan view of FIG. 1, FIG. 3 is a vertical cross-sectional side view showing a second embodiment of the invention, and FIG. 3 is a cross-sectional plan view of FIG. 3, FIGS. 5 and 6 are side views showing different embodiments of the present invention, and FIG.
Figure 8 is a characteristic diagram showing the relationship between cutting time and tool flank wear, Figure 8 is a characteristic diagram showing the relationship between cutting time and finished surface roughness Ra of various tools, and Figure 9 is a characteristic diagram showing the relationship between cutting time and tool flank wear. FIG. 3 is a characteristic diagram showing removal speeds of various tools. DESCRIPTION OF SYMBOLS 1... Base part, 2... Cutting edge part, 3... Outer layer part, 4... Inner layer part, 5... Damping coupling layer.
Claims (1)
いて、上記ベース部を重量基準でＣ；0.8〜3.0
％、Si；1.0〜3.0％、Ni；25〜40％、Co；4.0〜
6.0％、残部不可避的不純物を含むFeを主成分と
するオーステナイト系Ni−Co合金鋳鉄から成り
所定の半径で径方向に分割した内層部と外層部と
により形成し、前記内層部と外層部とをキー溝と
このキー溝に挿入したキーとによつて回り止めす
るとともに、前記内層部と外層部との間および前
記キー溝とキーとの間に厚さ3.0〜0.5mmの制振結
合層を介在させたことを特徴とする回転工具。 ２ 前記内層部と外層部とは、Ｃ；0.8〜3.0％、
Si；1.0〜3.0％、Ni；25〜40％、Co；4.0〜6.0％、
Mn；2.0％以下、Ｓ；1.0％以下、Ｐ；1.5％以下、
残部不可避的不純物を含むFeを主成分とするオ
ーステナイト系Ni−Co合金鋳鉄からなることを
特徴とする特許請求の範囲第１項記載の回転工
具。 ３ 制振結合層は、引張せん断強さτt＝10〜
20MPa、硬化前の粘度ηが常温でη＝30〜
40Pa・Ｓ、硬化物の横弾性率Ｇ＝0.05〜0.2GPa、
減衰係数ｃ＝３〜5MPa・Ｓ、接合層部分のばね
定数70〜130GN／ｍで構成されていることを特
徴とする特許請求の範囲第１項記載の回転工具。 ４ 制振結合層は、エポキシを主成分とするエポ
キシポリアミド系接着剤であることを特徴とする
特許請求の範囲第１項記載の回転工具。[Claims] 1. A rotary tool comprising a cutting edge portion and a base portion, wherein the base portion has a C of 0.8 to 3.0 on a weight basis.
%, Si; 1.0~3.0%, Ni; 25~40%, Co; 4.0~
It is made of austenitic Ni-Co alloy cast iron mainly composed of Fe containing 6.0% and the remainder unavoidable impurities, and is formed by an inner layer portion and an outer layer portion divided in the radial direction at a predetermined radius, and the inner layer portion and the outer layer portion are is prevented from rotating by a keyway and a key inserted into this keyway, and a damping coupling layer with a thickness of 3.0 to 0.5 mm is provided between the inner layer and the outer layer and between the keyway and the key. A rotary tool characterized by intervening. 2 The inner layer portion and the outer layer portion are C; 0.8 to 3.0%,
Si; 1.0-3.0%, Ni; 25-40%, Co; 4.0-6.0%,
Mn: 2.0% or less, S: 1.0% or less, P: 1.5% or less,
The rotary tool according to claim 1, characterized in that it is made of austenitic Ni-Co alloy cast iron containing Fe as a main component and containing unavoidable impurities. 3 The vibration damping bonding layer has a tensile shear strength τt=10~
20MPa, viscosity η before curing is η = 30 ~ at room temperature
40Pa・S, transverse elastic modulus of cured product G=0.05~0.2GPa,
The rotary tool according to claim 1, characterized in that the damping coefficient c=3 to 5 MPa·S and the spring constant of the bonding layer part is 70 to 130 GN/m. 4. The rotary tool according to claim 1, wherein the vibration damping bonding layer is an epoxy polyamide adhesive containing epoxy as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6015086A JPS62218044A (en) | 1986-03-18 | 1986-03-18 | Rotary tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6015086A JPS62218044A (en) | 1986-03-18 | 1986-03-18 | Rotary tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62218044A JPS62218044A (en) | 1987-09-25 |
| JPH0445291B2 true JPH0445291B2 (en) | 1992-07-24 |
Family
ID=13133836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6015086A Granted JPS62218044A (en) | 1986-03-18 | 1986-03-18 | Rotary tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62218044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509084A (en) * | 2019-09-02 | 2019-11-29 | 中北大学 | A kind of equi intensity cantilever formula composite power Boring Bar |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE511395C2 (en) * | 1996-07-08 | 1999-09-20 | Sandvik Ab | Lathe boom, method of manufacturing a lathe boom and use of the same |
| SE522081C2 (en) * | 2000-12-06 | 2004-01-13 | Sandvik Ab | Tools for machining in metallic materials |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023164U (en) * | 1973-06-27 | 1975-03-15 |
-
1986
- 1986-03-18 JP JP6015086A patent/JPS62218044A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023164U (en) * | 1973-06-27 | 1975-03-15 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509084A (en) * | 2019-09-02 | 2019-11-29 | 中北大学 | A kind of equi intensity cantilever formula composite power Boring Bar |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62218044A (en) | 1987-09-25 |
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