JPH0929530A - Roughing end mill - Google Patents
Roughing end millInfo
- Publication number
- JPH0929530A JPH0929530A JP20769395A JP20769395A JPH0929530A JP H0929530 A JPH0929530 A JP H0929530A JP 20769395 A JP20769395 A JP 20769395A JP 20769395 A JP20769395 A JP 20769395A JP H0929530 A JPH0929530 A JP H0929530A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- honing
- blade
- end mill
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/08—Side or top views of the cutting edge
- B23C2210/088—Cutting edges with a wave form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Description
【0001】[0001]
【従来の技術】ソリッドラフィングエンドミルには、通
常、図1に示すように切れ刃を凹凸のある波状に形成
し、使用に際しては波状切れ刃3の凸部の1点から切削
を始めることにより切削力を集中して喰い付き時の切削
抵抗を減じ、同時に波状切れ刃3の間の凹部がチップブ
レ−カとなって切り屑排除に便宜を与え、呼称のごとく
粗切削を可能にするものである。2. Description of the Related Art In a solid roughing end mill, a cutting edge is usually formed in a wavy shape having irregularities as shown in FIG. 1, and when used, cutting is started by starting from one point on the convex portion of the wavy cutting edge 3. By concentrating the force, the cutting resistance at the time of biting is reduced, and at the same time, the concave portions between the wavy cutting edges 3 serve as chip breakers to facilitate the removal of chips and, as the name implies, enable rough cutting. .
【0002】例としては、実開平4−128115号の
ラフィングエンドミル(以下、従来品と記載する。)が
あり、これエンドミルは、切れ刃を研削加工後、すくい
面側および逃げ面側に異なる量のホ−ニングを行ない、
その後、耐摩耗性硬質物質を被覆してものである。[0002] As an example, there is a roughing end mill (hereinafter referred to as a conventional product) of No. 4-128115, which has different amounts on a rake face side and a flank face side after grinding a cutting edge. Horning
Then, it is coated with a hard wear resistant material.
【0003】[0003]
【発明が解決しようとする問題点】ところが、ラフィン
グエンドミルは、波状切れ刃の頂部付近のみが切削に関
与する構造であって、切削力が該頂部付近に集中する結
果微視的な衝撃破壊を惹起する原因となり、これを作る
工具材料に制限を与えるものであった。従来品ではこれ
を改良してホ−ニングと硬質膜被覆により切れ刃を補強
している。また、波状切れ刃に全面に均一なホ−ニング
を行うこと自体が極めて難しい作業であって、出来栄え
にムラを生じやすく、性能のばらつきをもたらすという
問題があった。However, the roughing end mill has a structure in which only the vicinity of the apex of the wavy cutting edge is involved in cutting, and the cutting force is concentrated near the apex, resulting in microscopic impact fracture. It has been a cause for causing a limitation and limits the tool material for producing the same. In the conventional product, this is improved and the cutting edge is reinforced by honing and hard film coating. Further, it is extremely difficult to perform uniform honing on the entire surface of the wavy cutting edge itself, and there is a problem in that unevenness in the finished product is likely to occur and variation in performance is caused.
【0004】[0004]
【本発明の目的】本発明は、上述のような背景のもとに
なされたものであり、特に切削負荷の大きい重切削を行
なっても、切削性と切れ刃強度を維持して欠けあるいは
チッピング等を抑制し、かつ性能バラツキの少ない、粗
削り用として優れたラフィングエンドミルを提供するこ
とを目的とする。SUMMARY OF THE INVENTION The present invention has been made based on the above-mentioned background, and in particular, even if heavy cutting with a large cutting load is performed, the cutting property and the cutting edge strength are maintained and chipping or chipping occurs. It is an object of the present invention to provide a roughing end mill that suppresses the above-mentioned problems and has little performance variation and is excellent for rough cutting.
【0005】[0005]
【問題を解決するための手段】本発明は、上記の目的を
達成するために、工具本体の外周に複数のねじれた波状
の外周切れ刃を有するラフィングエンドミルにおいて、
波状の外周刃のすくい角が8〜20°であって、波状の
輪郭に沿って逃げ面上に0.02〜0.05mmの幅と
なるホ−ニングを施したものである。また、波状の外周
刃の頂点から工具半径方向に刃径の0.05倍以上にわ
たって波状の輪郭に沿ってホ−ニングを施したものであ
る。In order to achieve the above object, the present invention provides a roughing end mill having a plurality of twisted corrugated outer peripheral cutting edges on the outer periphery of a tool body,
The rake angle of the corrugated outer peripheral blade is 8 to 20 °, and horning having a width of 0.02 to 0.05 mm is provided on the flank along the corrugated contour. In addition, honing is performed along the wavy contour from the apex of the wavy outer peripheral edge in the tool radial direction at least 0.05 times the blade diameter.
【0006】[0006]
【作用】本発明を適用することにより、逃げ面にホ−ニ
ングを行なっても切削性を損なうことのない十分な切れ
刃角を維持することができ、かつホ−ニングの作用によ
って切削時に欠けやチッピングを生じることなく長時間
の切削ができるようになった。また、ホ−ニングの方法
としてはブラシホ−ニング法を採用すれば切れ刃エッジ
をシャ−プに保ちながらホ−ニングすることができ、か
つ波状切れ刃の頂部近傍のみをホ−ニングするので、過
剰なホ−ニング力を与えずにすむため、均一にかつ短時
間の作業で、性能のよいラフィングエンドミルを得られ
る。By applying the present invention, it is possible to maintain a sufficient cutting edge angle without damaging the machinability even if honing is performed on the flank, and the effect of honing causes chipping during cutting. It has become possible to cut for a long time without causing chipping or chipping. Also, as the honing method, if the brush honing method is adopted, it is possible to perform honing while keeping the cutting edge sharp, and since only the vicinity of the top of the wavy cutting edge is honed, Since it is not necessary to apply an excessive honing force, a roughing end mill with good performance can be obtained uniformly and in a short time.
【0007】ここで、すくい角を8°〜20°に限定し
た理由について説明する。既述のようにラフィングエン
ドミルにおいては、波状切れ刃の頂部が間歇的に切削に
関与するから、切削力が集中的に作用する。該切削力に
抗して切れ刃がチッピングや損傷を生じないようすくい
角は一般エンドミルに比べて小さく、通常は8°以下程
度に設定されることが多い。このような構成では、ホ−
ニングを施した場合波状切れ刃の頂部の切れ刃角は82
°以上であって切れ刃強度は優れるものの切れ味につい
ては劣るものである。これの改良手段として、すくい角
を8°以上に大きくした。しかし、すくい角が20°を
超えると切れ刃角は70°以下となるためもはや強度的
に満足とはいえない。これはホ−ニングを施さない一般
のエンドミルの切れ刃角が70°〜80°であることと
符合する。Here, the reason why the rake angle is limited to 8 ° to 20 ° will be described. As described above, in the roughing end mill, since the top of the wavy cutting edge intermittently participates in the cutting, the cutting force acts intensively. The rake angle is smaller than that of a general end mill so that the cutting edge does not chip or damage against the cutting force, and is usually set to about 8 ° or less. In such a configuration,
When applied, the cutting edge angle at the top of the wavy cutting edge is 82
Although the cutting edge strength is excellent when it is at least 0 °, the sharpness is poor. As a means for improving this, the rake angle is increased to 8 ° or more. However, if the rake angle exceeds 20 °, the cutting edge angle becomes 70 ° or less, so that the strength is no longer satisfactory. This is consistent with the fact that the cutting edge angle of a general end mill that is not subjected to honing is 70 ° to 80 °.
【0008】ラフィングエンドミルにおいては、波状切
れ刃の頂部近傍で切削するのであって、図2の説明図に
示すように波形の全輪郭が切削に関与することはない。
従って、ホ−ニングの必要な位置は切削に関与する部分
のみでよく、切削条件によって変化はあるが、ラフィン
グエンドミルの1刃当り送りは大きくても直径の2〜3
%であるから、波状切れ刃の頂部から半径方向に刃径の
5%の距離をホ−ニングすればよい。ラフィングエンド
ミルにおいては工具交換時期の切れ刃摩耗が一般エンド
ミルよりも大きく許容できるため、ホ−ニングの上限値
は0.1mmに限定した。これを越えると初期摩耗大
で、工具寿命を劣下させる。また0.02mm未満では
ホ−ニングとして作用せず、効果を現わさない。In the roughing end mill, the cutting is performed in the vicinity of the top of the wavy cutting edge, and the entire corrugated contour does not participate in the cutting as shown in the explanatory view of FIG.
Therefore, the position where honing is required is only the part related to cutting, and it varies depending on the cutting conditions, but the feed per blade of the roughing end mill is large even if the feed is 2-3
%, It is sufficient to horn a distance of 5% of the blade diameter from the top of the wavy cutting edge in the radial direction. In the roughing end mill, the wear of the cutting edge at the time of exchanging tools can be tolerated more than that in the general end mill, so the upper limit of honing is limited to 0.1 mm. If it exceeds this value, the initial wear is large and the tool life is shortened. On the other hand, if it is less than 0.02 mm, it does not act as honing and the effect is not exhibited.
【0009】[0009]
【実施例】以下、本発明をその実施例を示す図面に基づ
いて説明する。図3は本発明になるラフィングエンドミ
ル側面図であり1は工具本体である。工具本体1は高硬
度形の粉末高速度工具鋼を素材とし、その外周に複数の
ねじれた波状の外周刃2を有している。該ラフィングエ
ンドミルは刃数4枚刃で、直径20mm、刃長40m
m、全長140mm、シャンク径20mmである。波状
の外周刃2のすくい角は10°であって、図4に示すよ
うに波状切れ刃の凸部輪郭に沿って逃げ面上に0.02
〜0.03mmの幅でブラシホ−ニング法によりホ−ニ
ングを施してある。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing embodiments thereof. FIG. 3 is a side view of a roughing end mill according to the present invention, and 1 is a tool body. The tool main body 1 is made of a high hardness type powder high speed tool steel, and has a plurality of twisted corrugated outer peripheral blades 2 on the outer periphery thereof. The roughing end mill has four blades and has a diameter of 20 mm and a blade length of 40 m.
m, total length 140 mm, shank diameter 20 mm. The rake angle of the corrugated outer peripheral blade 2 is 10 °, and as shown in FIG. 4, 0.02 is formed on the flank along the convex contour of the corrugated cutting blade.
Honing is performed by a brush honing method with a width of about 0.03 mm.
【0010】図5は、本発明品とホ−ニングを施してい
ない無処理品およびガラスホ−ニング法によりホ−ニン
グを施した比較品との比較例を示す。尚、ラフィングエ
ンドミルのその他の仕様は上記発明品の実施例と同一で
ある。比較試験では、切削速度30m/min、切り込
み20×20mm、一定距離づつ送りを変えて切削し
た。被削材として構造用炭素鋼S50Cを用いて、切削
しているが、同一長さ切削において逃げ面摩耗幅が、無
処理品に対して1/4に、比較品に対して1/2に縮減
できることが明らかとなった。FIG. 5 shows a comparative example of the product of the present invention, an untreated product not subjected to honing, and a comparative product subjected to honing by the glass honing method. The other specifications of the roughing end mill are the same as those of the above-described embodiment of the invention product. In the comparative test, cutting was performed at a cutting speed of 30 m / min, a cutting depth of 20 × 20 mm, and the feed at constant intervals. The structural carbon steel S50C is used as the work material for cutting, but the flank wear width is ¼ for the untreated product and ½ for the comparative product for the same length cutting. It became clear that it could be reduced.
【0011】[0011]
【発明の効果】以上のように本発明によれば、とくに切
削負荷の大きい重切削においても切れ刃に欠けやチッピ
ングが生じにくく長寿命を得ることができ、硬質材や強
靱材など難削材においても重切削が容易に行えるように
なったのである。As described above, according to the present invention, even in heavy cutting with a large cutting load, chipping and chipping are unlikely to occur in the cutting edge and a long life can be obtained, and hard-to-cut materials such as hard materials and tough materials Even in, heavy cutting has become easy.
【図1】図1は、ラフィングエンドミルの切れ刃の切削
位置を示す。FIG. 1 shows a cutting position of a cutting edge of a roughing end mill.
【図2】図2は、ラフィングエンドミルの切削時の切れ
刃関与を示す。FIG. 2 shows cutting edge involvement during cutting of a roughing end mill.
【図3】図3は、本発明の一実施例を示し、その正面図
を示す。FIG. 3 shows an embodiment of the present invention and shows a front view thereof.
【図4】図4は、図2の切れ刃部分の拡大図を示す。4 is an enlarged view of a cutting edge portion of FIG.
【図5】図5は、切削試験の結果を示す。FIG. 5 shows the results of a cutting test.
1 工具本体 2 波状の外周刃 3 波状切れ刃 4 切れ刃角 1 Tool body 2 Wavy peripheral edge 3 Wavy cutting edge 4 Cutting edge angle
Claims (2)
れた波状の外周刃を有するラフィングエンドミルにおい
て、該波状の外周刃のすくい角が8〜20°であって、
波状の輪郭に沿って逃げ面上に0.02〜0.1mmの
幅となるホ−ニングを施したことを特徴とするラフィン
グエンドミル。1. A roughing end mill having a plurality of twisted corrugated peripheral blades on the outer periphery of a solid tool body, wherein the corrugated peripheral blades have a rake angle of 8 to 20 °,
A roughing end mill, characterized in that a flank is horned to have a width of 0.02 to 0.1 mm along a wavy contour.
おいて、波状の外周刃の頂点から工具半径方向に刃径の
0.05倍以上にわたって波状の輪郭に沿ったホ−ニン
グを施したことを特徴とするラフィングエンドミル。2. The roughing end mill according to claim 1, wherein honing is performed along the wavy contour from the apex of the wavy outer peripheral blade to the tool radius direction at least 0.05 times the blade diameter. Roughing end mill.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20769395A JPH0929530A (en) | 1995-07-21 | 1995-07-21 | Roughing end mill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20769395A JPH0929530A (en) | 1995-07-21 | 1995-07-21 | Roughing end mill |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0929530A true JPH0929530A (en) | 1997-02-04 |
Family
ID=16544016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20769395A Pending JPH0929530A (en) | 1995-07-21 | 1995-07-21 | Roughing end mill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0929530A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002524279A (en) * | 1998-09-03 | 2002-08-06 | アンカ・ピーティーワイ・リミテッド | Grinding method of cutting tool with corrugated cutting edge |
US6715966B2 (en) | 2001-02-02 | 2004-04-06 | Osg Corporation | Rotary cutting tool having corrugated cutting edge portion whose pitch and/or depth are/is increased with increase in diameter of body of the cutting tool |
EP1777027A1 (en) * | 2005-10-24 | 2007-04-25 | Fraisa Holding AG | Milling cutter for roughing of workpieces |
JP2008055594A (en) * | 2006-08-28 | 2008-03-13 | Fraisa Holding Ag | Milling cutter for machining workpiece by cutting |
JP2009148860A (en) * | 2007-12-21 | 2009-07-09 | Mitsubishi Electric Corp | End mill, and machining method using the same |
US20120148352A1 (en) * | 2007-08-21 | 2012-06-14 | Mitsubishi Materials Corporation | End mill |
WO2014156490A1 (en) * | 2013-03-29 | 2014-10-02 | 三菱マテリアル株式会社 | Roughing end mill |
JP2015174170A (en) * | 2014-03-14 | 2015-10-05 | 三菱マテリアル株式会社 | roughing end mill |
CN113843442A (en) * | 2021-10-12 | 2021-12-28 | 东莞富兰地工具股份有限公司 | Rough and finish machining integrated milling cutter |
-
1995
- 1995-07-21 JP JP20769395A patent/JPH0929530A/en active Pending
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002524279A (en) * | 1998-09-03 | 2002-08-06 | アンカ・ピーティーワイ・リミテッド | Grinding method of cutting tool with corrugated cutting edge |
US6715966B2 (en) | 2001-02-02 | 2004-04-06 | Osg Corporation | Rotary cutting tool having corrugated cutting edge portion whose pitch and/or depth are/is increased with increase in diameter of body of the cutting tool |
US7771141B2 (en) | 2005-10-24 | 2010-08-10 | Fraisa Holding Ag | Milling tool for roughing workpieces |
JP2007118178A (en) * | 2005-10-24 | 2007-05-17 | Fraisa Holding Ag Co Fraisa Sa | Milling cutter for roughing of workpiece |
EP1777027A1 (en) * | 2005-10-24 | 2007-04-25 | Fraisa Holding AG | Milling cutter for roughing of workpieces |
JP2008055594A (en) * | 2006-08-28 | 2008-03-13 | Fraisa Holding Ag | Milling cutter for machining workpiece by cutting |
US20120148352A1 (en) * | 2007-08-21 | 2012-06-14 | Mitsubishi Materials Corporation | End mill |
US8690493B2 (en) * | 2007-08-21 | 2014-04-08 | Mitsubishiki Materials Corporation | End mill |
JP2009148860A (en) * | 2007-12-21 | 2009-07-09 | Mitsubishi Electric Corp | End mill, and machining method using the same |
WO2014156490A1 (en) * | 2013-03-29 | 2014-10-02 | 三菱マテリアル株式会社 | Roughing end mill |
JP2014193506A (en) * | 2013-03-29 | 2014-10-09 | Mitsubishi Materials Corp | Roughing end mill |
US9707628B2 (en) | 2013-03-29 | 2017-07-18 | Mitsubishi Materials Corporation | Roughing end mill |
JP2015174170A (en) * | 2014-03-14 | 2015-10-05 | 三菱マテリアル株式会社 | roughing end mill |
CN113843442A (en) * | 2021-10-12 | 2021-12-28 | 东莞富兰地工具股份有限公司 | Rough and finish machining integrated milling cutter |
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