JP2515006Y2 - End mill with corrugated peripheral blade on cylindrical surface - Google Patents

End mill with corrugated peripheral blade on cylindrical surface

Info

Publication number
JP2515006Y2
JP2515006Y2 JP867793U JP867793U JP2515006Y2 JP 2515006 Y2 JP2515006 Y2 JP 2515006Y2 JP 867793 U JP867793 U JP 867793U JP 867793 U JP867793 U JP 867793U JP 2515006 Y2 JP2515006 Y2 JP 2515006Y2
Authority
JP
Japan
Prior art keywords
outer peripheral
end mill
blade
peripheral blade
corrugated
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
Application number
JP867793U
Other languages
Japanese (ja)
Other versions
JPH0661410U (en
Inventor
治男 後藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OSG Corp
Original Assignee
OSG Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OSG Corp filed Critical OSG Corp
Priority to JP867793U priority Critical patent/JP2515006Y2/en
Publication of JPH0661410U publication Critical patent/JPH0661410U/en
Application granted granted Critical
Publication of JP2515006Y2 publication Critical patent/JP2515006Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】本考案は、複数の外周刃が一円筒
面上において螺旋状に捩じれているとともに略正弦曲線
状の波形を成し且つその波形の位相が互いにずれている
エンドミルの改良に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an improvement of an end mill in which a plurality of outer peripheral blades are spirally twisted on one cylindrical surface, form a substantially sinusoidal waveform, and the waveforms are out of phase with each other. It is about.

【0002】[0002]

【従来の技術】(a)一円筒面上において螺旋状に捩じ
れているとともにその螺旋に沿ってすくい面に凹凸が設
けられることにより略正弦曲線状の波形を成している複
数の外周刃が互いに波形の位相をずらした状態で形成さ
れている刃部と、(b)その刃部と同軸上に一体に設け
られたシャンクとを有するエンドミルが知られている。
特公昭47−10316号公報や特開昭62−6821
7号公報等に記載されているエンドミルはその一例であ
り、このようなエンドミルによれば、外周刃のアキシャ
ルレーキが連続的に変化しているとともに波形の位相が
互いにずれているため、びびり振動が抑制されて重切削
や高能率加工が可能になるとともに、優れた仕上げ面粗
さが得られる。
2. Description of the Related Art (a) A plurality of outer peripheral blades that are spirally twisted on one cylindrical surface and that are provided with irregularities on the rake face along the spiral form a substantially sinusoidal waveform. There is known an end mill including a blade portion formed in a state where waveform phases are shifted from each other, and (b) a shank integrally provided coaxially with the blade portion.
JP-B-47-10316 and JP-A-62-6821
The end mill described in Japanese Patent Publication No. 7 is an example thereof, and according to such an end mill, the axial rakes of the outer peripheral blades are continuously changed and the phases of the waveforms are deviated from each other, which causes chatter vibration. Is suppressed, heavy cutting and high-efficiency machining are possible, and excellent finished surface roughness is obtained.

【0003】[0003]

【考案が解決しようとする課題】しかしながら、上記の
ように複数の外周刃の波形の位相が互いにずれている
と、前記刃部のうちシャンクに近い切上げ部に波形の凹
部が位置する外周刃が存在し、軸心と直角な断面積が減
少して応力集中が生じ易くなり、エンドミルの折損強度
を低下させていた。かかるエンドミルは、前述のように
重切削や高能率加工に用いられるのが普通であるため、
折損強度の低下は大きな問題となる。
However, when the corrugations of the plurality of outer peripheral blades are out of phase with each other as described above, the outer peripheral blade in which the corrugated concave portion is located in the round-up portion of the blade portion near the shank is However, the cross-sectional area perpendicular to the axis is reduced, stress concentration is likely to occur, and the breakage strength of the end mill is reduced. Since such an end mill is usually used for heavy cutting or high-efficiency processing as described above,
Decrease in breakage strength is a serious problem.

【0004】本考案は以上の事情を背景として為された
もので、その目的とするところは、一円筒面上に複数の
波形外周刃を有するとともにその波形の位相が互いにず
れているエンドミルの折損強度を向上させることにあ
る。
The present invention has been made in view of the above circumstances, and an object of the present invention is to break an end mill having a plurality of corrugated outer peripheral blades on one cylindrical surface and the corrugations of the corrugations being out of phase with each other. It is to improve the strength.

【0005】[0005]

【課題を解決するための手段】かかる目的を達成するた
めに、本考案は、(a)一円筒面上において螺旋状に捩
じれているとともにその螺旋に沿ってすくい面に凹凸が
設けられることにより略正弦曲線状の波形を成している
複数の外周刃が互いに波形の位相をずらした状態で形成
されている刃部と、(b)その刃部と同軸上に一体に設
けられたシャンクとを有するエンドミルにおいて、
(c)前記外周刃は、前記シャンクに近い切上げ部に前
記波形の凸部から連続して前記螺旋と略平行に形成され
た平行部を有することを特徴とする。
In order to achieve the above object, the present invention provides: (a) spirally twisting on one cylindrical surface, and the rake surface is provided with irregularities along the spiral. A blade portion in which a plurality of outer peripheral blades having a substantially sinusoidal waveform are formed with their waveform phases shifted from each other, and (b) a shank integrally provided coaxially with the blade portion. In an end mill having
(C) The outer peripheral blade is characterized in that the raised portion near the shank has a parallel portion formed continuously from the corrugated convex portion and substantially parallel to the spiral.

【0006】[0006]

【作用および考案の効果】このようなエンドミルにおい
ては、外周刃のうちシャンクに近い切上げ部には波形の
凸部から螺旋と略平行に平行部が設けられているため、
波形の凹部が切上げ部に位置する外周刃が存在する従来
のエンドミルに比較して、その切上げ部における軸心と
直角な断面積が大きくなるとともに応力集中が軽減さ
れ、エンドミルの折損強度が向上する。これにより、波
形外周刃による切削性能および仕上げ面粗さの向上効果
を維持しつつ、工具寿命が長くなるとともに一層の重切
削,高能率加工が可能となる。
In this end mill, since the outer peripheral blade has a rounded-up portion near the shank, a parallel portion is provided substantially parallel to the spiral from the wavy convex portion.
Compared to a conventional end mill in which a corrugated concave portion is located in the raised portion, there is an outer peripheral blade, and the cross-sectional area perpendicular to the axial center of the raised portion is increased, stress concentration is reduced, and the break strength of the end mill is improved. . As a result, while maintaining the effect of improving the cutting performance and the finished surface roughness by the corrugated outer peripheral blade, the tool life is extended and further heavy cutting and high efficiency machining are possible.

【0007】なお、螺旋と略平行な平行部の長さ寸法
は、各外周刃の波形の位相によって異なるが、切削性能
の低下を防止する上で、最も長いものでも波形のピッチ
の1.5倍以内とすることが望ましい。
The length dimension of the parallel portion substantially parallel to the spiral differs depending on the phase of the waveform of each outer peripheral blade, but in order to prevent the cutting performance from deteriorating, even the longest one has a waveform pitch of 1.5. It is desirable to set it within twice.

【0008】[0008]

【実施例】以下、本考案の一実施例を図面に基づいて詳
細に説明する。図1は、本考案の一実施例である円筒面
上に波形外周刃を備えたエンドミル10(以下、単にエ
ンドミル10という)を軸心と直角方向から見た正面図
で、図2は図1のII−II断面図である。かかるエンドミ
ル10は、フライス盤等に把持されるシャンク12と刃
部14とを同軸上に一体に備えており、刃部14には4
本の捩れ溝が設けられることにより4枚の外周刃16
a,16b,16c,16d(以下、特に区別しない場
合には単に外周刃16という)が形成されている。これ
等の外周刃16は、何れも同一形状を成しており、周方
向において等分割、すなわち90゜間隔で設けられてい
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view of an end mill 10 (hereinafter, simply referred to as end mill 10) having a corrugated outer peripheral blade on a cylindrical surface, which is one embodiment of the present invention, as viewed from a direction perpendicular to an axis, and FIG. 11 is a sectional view taken along line II-II of FIG. The end mill 10 is provided with a shank 12 and a blade portion 14 which are gripped by a milling machine and the like coaxially and integrally, and the blade portion 14 has four
By providing four twist grooves, four outer peripheral blades 16
A, 16b, 16c, 16d (hereinafter, simply referred to as outer peripheral blade 16 unless otherwise specified) are formed. These outer peripheral blades 16 have the same shape and are equally divided in the circumferential direction, that is, they are provided at 90 ° intervals.

【0009】上記外周刃16は、径寸法が一定の一円筒
面上において、一定の捩れ角で螺旋状に捩じれていると
ともに波形を成している。この波形は、螺旋に沿ってす
くい面に滑らかな凹凸を設けることによって形成されて
おり、各外周刃16は、図3の展開図から明らかなよう
に、一定の波形高さHおよびピッチPで凸部18および
凹部20が交互に連続的に設けられた略正弦曲線状を成
しているとともに、4枚の外周刃16は、その波形の位
相が切削回転方向と反対方向に隣接するものほどP/4
ずつ軸方向の先端側へずらされている。また、これ等の
外周刃16は、シャンク12に近い切上げ部22に位置
する部分、およびエンドミル10の先端側部分に、何れ
も凸部18の頂上から連続して螺旋と略平行に形成され
た平行部24,26を備えている。平行部24の長さ寸
法は、図3に示されている平行部26と同様に各外周刃
16によって異なるが、最も長いものが波形のピッチP
の0.75〜1.5倍程度の範囲、望ましくは1〜1.
5倍の範囲内となるように定められており、図2の断面
図に示されているシャンク12の近傍部分では何れも平
行部24で、各外周刃16は波形の凸部18と同一断面
を成している。
The outer peripheral blade 16 is helically twisted at a constant twist angle on one cylindrical surface having a constant diameter and has a corrugated shape. This corrugation is formed by providing smooth irregularities on the rake face along the spiral, and each outer peripheral blade 16 has a constant corrugation height H and pitch P, as is apparent from the development view of FIG. The convex portions 18 and the concave portions 20 are alternately and continuously formed in a substantially sinusoidal shape, and the four outer peripheral blades 16 are such that the waveform phases thereof are adjacent to each other in the direction opposite to the cutting rotation direction. P / 4
Each is shifted toward the tip side in the axial direction. In addition, these outer peripheral blades 16 are continuously formed substantially parallel to the spiral from the top of the convex portion 18 at the portion located at the raised portion 22 near the shank 12 and at the tip side portion of the end mill 10. The parallel portions 24 and 26 are provided. The length dimension of the parallel part 24 differs depending on each outer peripheral blade 16 as in the parallel part 26 shown in FIG. 3, but the longest one is the corrugated pitch P.
0.75 to 1.5 times the range, preferably 1 to 1.
It is set to be within a range of 5 times, and in the vicinity of the shank 12 shown in the sectional view of FIG. 2, all are parallel portions 24, and each outer peripheral blade 16 has the same cross section as the corrugated convex portion 18. Is done.

【0010】以上のように構成されたエンドミル10
は、図示しないフライス盤等にシャンク12が把持され
て軸心まわりに回転駆動されることにより、上記4枚の
外周刃16によって図示しない被削材に切削加工を行
う。その場合に、かかるエンドミル10の外周刃16は
周方向に凹凸した波形を成し、その外周刃16のアキシ
ャルレーキが連続的に変化しているとともに、その波形
の位相が互いにずらされているため、びびり振動等が抑
制されて切削性能が向上し、重切削や高能率切削が可能
である。また、外周刃16は一円筒面上に形成されてい
るため、切削性能の向上効果によって優れた仕上げ面粗
さが得られる。
The end mill 10 configured as described above
When the shank 12 is gripped by a milling machine or the like (not shown) and is driven to rotate about the axis, the four outer peripheral blades 16 cut the work material (not shown). In that case, the outer peripheral blade 16 of the end mill 10 has a corrugated waveform in the circumferential direction, and the axial rake of the outer peripheral blade 16 is continuously changing, and the phases of the waveforms are shifted from each other. , Chatter vibration is suppressed, cutting performance is improved, and heavy cutting and high efficiency cutting are possible. Further, since the outer peripheral blade 16 is formed on one cylindrical surface, excellent finishing surface roughness can be obtained due to the effect of improving cutting performance.

【0011】一方、本実施例のエンドミル10は、切上
げ部22における各外周刃16に凸部18の頂上から連
続する平行部24が設けられているため、図5および図
6に示すように外周刃32に平行部24が設けられてい
ない従来のエンドミル30に比較して、切上げ部22に
おける軸心と直角な断面積が大きくなるとともに応力集
中が軽減され、高い折損強度が得られる。これにより、
波形外周刃16による切削性能および仕上げ面粗さの向
上効果を維持しつつ、工具寿命が長くなるとともに一層
の重切削,高能率加工が可能となる。なお、上記従来の
エンドミル30は、切上げ部における断面を示す図6か
ら明らかなように、波形の位相によって各外周刃32の
断面形状が相違し、外周刃32aは波形の凹部位置、外
周刃32bは凹部と凸部との中間位置、外周刃32cは
凸部位置、外周刃32dは凸部と凹部との中間位置であ
る。
On the other hand, in the end mill 10 of this embodiment, since the outer peripheral blades 16 of the cut-up portion 22 are provided with the parallel portions 24 continuous from the top of the convex portion 18, as shown in FIG. 5 and FIG. As compared with the conventional end mill 30 in which the blade 32 is not provided with the parallel portion 24, the cross-sectional area of the cut-up portion 22 perpendicular to the axis is increased, stress concentration is reduced, and high breakage strength is obtained. This allows
While maintaining the effect of improving the cutting performance and the finished surface roughness by the corrugated outer peripheral blade 16, the tool life is extended and further heavy cutting and high efficiency machining are possible. In the above-mentioned conventional end mill 30, as is clear from FIG. 6 showing the cross section at the cut-up portion, the cross-sectional shape of each outer peripheral blade 32 differs depending on the phase of the corrugation, and the outer peripheral blade 32a has the corrugated concave position and the outer peripheral blade 32b. Is the intermediate position between the concave portion and the convex portion, the outer peripheral blade 32c is the convex portion position, and the outer peripheral blade 32d is the intermediate position between the convex portion and the concave portion.

【0012】因みに、刃径が20mm、刃長が45m
m、シャンク径が20mm、波形のピッチP=9.5m
m、波形の高さH=1.2mm、外周刃のねじれ角が3
0°、刃数が4枚、材質が8%CoのHSS(HRC6
8)の本考案品および従来品をそれぞれ2本ずつ用意
し、以下の切削条件で切削試験を行ったところ、図4に
示す結果が得られた。本考案品は、平行部24の最大長
さが12mm(波形のピッチPの約1.25倍)であ
る。
Incidentally, the blade diameter is 20 mm and the blade length is 45 m.
m, shank diameter 20 mm, corrugated pitch P = 9.5 m
m, the height of the corrugation H = 1.2 mm, the twist angle of the outer peripheral blade is 3
0 °, 4 blades, 8% Co HSS (HRC6
Two pieces of each of the present invention product and the conventional product of 8) were prepared, and a cutting test was conducted under the following cutting conditions. The results shown in FIG. 4 were obtained. In the product of the present invention, the maximum length of the parallel portion 24 is 12 mm (about 1.25 times the pitch P of the waveform).

【0013】(切削条件) ・被削材:S50C(HRB92) ・切削回転速度:475rpm ・送り:150mm/minダウンカット ・切込み深さ:30mm×10mm ・切削油:硫塩化系不水溶性切削油 ・機械:立型マシニングセンタ(Cutting conditions) Work material: S50C (HRB92) Cutting speed: 475 rpm Feed: 150 mm / min down cut Depth of cut: 30 mm x 10 mm Cutting oil: Sulfur chloride-based water-insoluble cutting oil・ Machine: Vertical machining center

【0014】図4から明らかなように、切削に伴う外周
刃の逃げ面摩耗幅の増加度合は従来品と本考案品との間
で殆ど差がないが、従来品は約13mの切削で逃げ面摩
耗幅が約0.35mmとなった時点で2本共折損したの
に対し、本考案品は17m(従来品の130%以上)の
切削で逃げ面摩耗幅が0.45〜0.50mm(従来品
の130%以上)となっても折損しなかった。このこと
から、本考案によれば折損強度が大幅に改善されること
が判る。
As is apparent from FIG. 4, there is almost no difference between the conventional product and the product of the present invention in the degree of increase in the flank wear width of the outer peripheral blade due to cutting, but the conventional product escapes after cutting about 13 m. Two pieces were broken together when the surface wear width was about 0.35 mm, whereas the flank wear width was 0.45 to 0.50 mm when the product of the present invention was cut by 17 m (130% or more of the conventional product). It did not break even when it became (130% or more of the conventional product). From this, it is understood that the present invention greatly improves the breakage strength.

【0015】以上、本考案の一実施例を図面に基づいて
詳細に説明したが、本考案は他の態様で実施することも
できる。
Although the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in other forms.

【0016】例えば、外周刃16の枚数や波形のピッチ
P,高さH,平行部24,26の長さ等は適宜設定でき
るし、複数の外周刃16を軸心まわりにおいて不等間隔
で設けることも可能である。
For example, the number of outer peripheral blades 16, the pitch P of the corrugations, the height H, the lengths of the parallel portions 24, 26, etc. can be set appropriately, and a plurality of outer peripheral blades 16 are provided at unequal intervals around the axis. It is also possible.

【0017】また、図3において外周刃16の位相のず
れ方向を逆にしたり、外周刃16a〜16dの周方向に
おける順番を変更したりすることもできる。各外周刃1
6の位相のずれ量は、必ずしも厳密にP/4とする必要
はないとともに、4枚の外周刃16の位相のずれ量が互
いに同じである必要もない。
Further, in FIG. 3, it is possible to reverse the phase shift direction of the outer peripheral blade 16 or change the order of the outer peripheral blades 16a to 16d in the peripheral direction. Each peripheral blade 1
The phase shift amount of 6 does not necessarily have to be strictly P / 4, and the phase shift amounts of the four outer peripheral blades 16 do not have to be the same.

【0018】また、一軸線方向に向かうに従って径寸法
が連続的に変化しているテーパ状の一円筒面上に外周刃
が位置するテーパエンドミルや、切り屑を分断するため
のニックが逃げ面に形成されているエンドミル等にも本
考案は同様に適用され得る。
Further, a taper end mill in which an outer peripheral blade is located on a tapered cylindrical surface whose diameter continuously changes in the uniaxial direction, and a nick for cutting chips on the flank surface The present invention can be similarly applied to formed end mills and the like.

【0019】その他一々例示はしないが、本考案は当業
者の知識に基づいて種々の変更,改良を加えた態様で実
施することができる。
Although not specifically exemplified, the present invention can be embodied in various modified and improved forms based on the knowledge of those skilled in the art.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案の一実施例である円筒面上に波形外周刃
を備えたエンドミルの正面図である。
FIG. 1 is a front view of an end mill having a corrugated outer peripheral blade on a cylindrical surface, which is an embodiment of the present invention.

【図2】図1におけるII−II断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.

【図3】図1のエンドミルの外周刃を示す展開図であ
る。
FIG. 3 is a development view showing an outer peripheral blade of the end mill shown in FIG. 1.

【図4】本考案品と従来品とをそれぞれ2本ずつ用いて
行った切削試験の試験結果を説明する図である。
FIG. 4 is a diagram for explaining test results of a cutting test performed using two of the present invention product and two of the conventional product.

【図5】従来のエンドミルの一例を示す正面図である。FIG. 5 is a front view showing an example of a conventional end mill.

【図6】図5におけるVI−VI断面図である。6 is a sectional view taken along line VI-VI in FIG.

【符号の説明】[Explanation of symbols]

10:円筒面上に波形外周刃を備えたエンドミル 12:シャンク 14:刃部 16a,16b,16c,16d:外周刃 18:凸部 22:切上げ部 24:平行部 10: End mill equipped with corrugated outer peripheral blade on cylindrical surface 12: Shank 14: Blade portion 16a, 16b, 16c, 16d: Outer peripheral blade 18: Convex portion 22: Rounded portion 24: Parallel portion

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項1】 一円筒面上において螺旋状に捩じれてい
るとともに該螺旋に沿ってすくい面に凹凸が設けられる
ことにより略正弦曲線状の波形を成している複数の外周
刃が互いに波形の位相をずらした状態で形成されている
刃部と、該刃部と同軸上に一体に設けられたシャンクと
を有するエンドミルにおいて、 前記外周刃は、前記シャンクに近い切上げ部に前記波形
の凸部から連続して前記螺旋と略平行に形成された平行
部を有することを特徴とする円筒面上に波形外周刃を備
えたエンドミル。
1. A plurality of outer peripheral blades which are twisted in a spiral shape on one cylindrical surface and are provided with irregularities on a rake surface along the spiral to form a substantially sinusoidal waveform, and the outer peripheral blades are corrugated with each other. In an end mill having a blade portion formed in a phase-shifted state and a shank integrally provided coaxially with the blade portion, the outer peripheral blade has a corrugated convex portion at a round-up portion near the shank. End mill having a corrugated outer peripheral blade on a cylindrical surface, characterized in that it has a parallel portion formed continuously from the above to substantially parallel to the spiral.
JP867793U 1993-02-08 1993-02-08 End mill with corrugated peripheral blade on cylindrical surface Expired - Lifetime JP2515006Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP867793U JP2515006Y2 (en) 1993-02-08 1993-02-08 End mill with corrugated peripheral blade on cylindrical surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP867793U JP2515006Y2 (en) 1993-02-08 1993-02-08 End mill with corrugated peripheral blade on cylindrical surface

Publications (2)

Publication Number Publication Date
JPH0661410U JPH0661410U (en) 1994-08-30
JP2515006Y2 true JP2515006Y2 (en) 1996-10-23

Family

ID=11699565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP867793U Expired - Lifetime JP2515006Y2 (en) 1993-02-08 1993-02-08 End mill with corrugated peripheral blade on cylindrical surface

Country Status (1)

Country Link
JP (1) JP2515006Y2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL146370A (en) * 2001-11-06 2007-07-04 Hanita Metal Works Ltd Rotary milling cutter
EP1894655B1 (en) * 2006-08-28 2012-03-21 Fraisa Holding AG Milling tool for chip removing machining of workpieces
JP2009148860A (en) * 2007-12-21 2009-07-09 Mitsubishi Electric Corp End mill, and machining method using the same
JP5231123B2 (en) * 2008-08-06 2013-07-10 本田技研工業株式会社 Electrode shaping device
JP5381132B2 (en) * 2009-02-02 2014-01-08 三菱マテリアル株式会社 Roughing end mill
WO2011023381A1 (en) * 2009-08-26 2011-03-03 Stryker Ireland, Ltd. Ribbed surgical bur
JP5346827B2 (en) * 2010-02-01 2013-11-20 株式会社大光研磨 End mill
JP7227480B2 (en) * 2019-03-26 2023-02-22 三菱マテリアル株式会社 roughing end mill

Also Published As

Publication number Publication date
JPH0661410U (en) 1994-08-30

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