JPS62173109A - Annular drilling cutter - Google Patents
Annular drilling cutterInfo
- Publication number
- JPS62173109A JPS62173109A JP61009836A JP983686A JPS62173109A JP S62173109 A JPS62173109 A JP S62173109A JP 61009836 A JP61009836 A JP 61009836A JP 983686 A JP983686 A JP 983686A JP S62173109 A JPS62173109 A JP S62173109A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- blade
- cutter
- annular
- cutting blades
- 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
- 238000005553 drilling Methods 0.000 title abstract description 15
- 238000004080 punching Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000010730 cutting oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
本発明は環状穿孔刃物に関わり、更に詳細には円筒状の
刃物本体先端の切刃設定部中心角を均等に偶数の領域に
分割して、刃物本体の中心軸を中心として対称位置の各
分υｊ部に切刃をそれぞれ設置１だ環状穿孔刃物に関す
るしのである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an annular perforating cutter, and more specifically, the present invention relates to an annular punching cutter, and more specifically, the central angle of the cutting edge setting portion at the tip of the cylindrical cutter body is equally divided into an even number of regions. , a cutting blade is installed at each portion υj at a symmetrical position with respect to the central axis of the blade body.
（従来の技術〕
従来から環状穿孔刃物は、円筒状の刃物本体の一端に、
円筒のほぼ肉厚に等しい多数の切刃を設【Ｊて軸のまわ
りに回転駆動して、６部を残してはぼ円筒外径の丸穴を
あける工具である。(Prior art) Conventionally, an annular perforated cutter has a cylindrical cutter body with a
It is a tool that has a large number of cutting blades approximately equal to the wall thickness of a cylinder and is driven to rotate around a shaft to drill a round hole with all but six sections having the outside diameter of the cylinder.
したがって、環状に多数の切刃を持つことが特徴で、こ
の多数の切刃を創成する場合も、再研削する場合も効果
的な研削が迅速で容易に行なえるものでなければならな
い。Therefore, it is characterized by having a large number of cutting edges in an annular shape, and effective grinding must be able to be performed quickly and easily both when creating this large number of cutting edges and when re-grinding.
また、従来の環状穿孔刃物を穿孔機のスピンドルに取付
けて穿孔加工を施して穿孔の穴を必要な精度に確保しな
ければならない。In addition, a conventional annular drilling tool must be attached to the spindle of a drilling machine to perform the drilling process to ensure the required accuracy of the drilling holes.
しかしながら、従来の環状穿孔刃物を用いて穿孔加工を
施したのでは、穿孔の穴の精度は穿孔様のスピンドルの
振れなどに影響され、ある機械によっては必要な制度が
確保できないという問題がある。However, when drilling is performed using a conventional annular drilling tool, the accuracy of the drilling hole is affected by the vibration of the spindle during drilling, and there is a problem that the required accuracy cannot be achieved depending on the machine.
本発明の目的は上記事情に鑑み問題を解決するために提
案されたものであって、穿孔の穴の精度を良好にした環
状穿孔刃物を提供するものである。SUMMARY OF THE INVENTION An object of the present invention was proposed in order to solve the problem in view of the above-mentioned circumstances, and it is an object of the present invention to provide an annular punching cutter that improves the accuracy of punching holes.
本発明は上記目的を達成するために、円筒状の刃物本体
先端の刃物設定部中心角を均等に偶数の領域に分割して
、刃物本体の中心軸を中心として対称位置の各分割部に
刃物をそれぞれ設け、各対称位置の分割部に配設される
刃物をほぼ同寸同径とすることを特徴とするものである
。In order to achieve the above object, the present invention divides the central angle of the blade setting part at the tip of the cylindrical blade body into even number of areas, and divides the blade into each divided part at a symmetrical position with respect to the central axis of the blade body. It is characterized in that the blades disposed in the divided portions at each symmetrical position are approximately the same size and diameter.
本発明の環状穿孔刃物を採用することによって、先端先
行刃を対面に位置させ、最も単純なバランスカットとし
て求心性を持たせるようにしであるから、穿孔機のスピ
ンドルに多少の振れなどがあっても影響を受けずに必要
な穴の精度を守って加工される。By adopting the annular punching cutter of the present invention, the tip leading blades are positioned facing each other to provide centripetal properties as the simplest balance cut, so there is no possibility that the spindle of the punching machine may run out to some extent. The holes are machined to the required precision without being affected.
以下、本発明の一実施例を図面に基づいて詳細に説明す
る。Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.
第１図は本発明の環状穿孔刃物を示す斜視図で、第１図
を参照するに、環状穿孔刃物１は円筒状の刃物本体３と
、シャンク部５からなり、刃物本体３にはその最大厚み
の約半分の深さに外周上にほぼ等しいピッチで下方の先
端部から上向きのねじれ溝７が複数条形成しである。FIG. 1 is a perspective view showing an annular perforating cutter of the present invention. Referring to FIG. A plurality of twisted grooves 7 are formed on the outer periphery at a depth of approximately half the thickness and upward from the lower tip at approximately equal pitches.
シャンク部５は孔あけ機械に取り付けて回転駆動させる
部分であり、上下に切削油を通す貫通穴９が設けてある
。The shank portion 5 is a portion that is attached to a drilling machine and driven to rotate, and is provided with through holes 9 at the top and bottom for passing cutting oil.
第１図および第２図に示した実施例の切刃部１１には、
その円周の１／２ （１８０度）を−組とする内刃１３
．中刃１５および外刃１７の３種類の刃が順番に形成し
である。したがって、内刃１３、中刃１５および外刃１
７における外刃の高さ位置が前記刃物本体３の軸方向に
順次短かくしてあって、後方の切刃はどおくれで被加工
材の同一高さ面を切削するように高さを付けて設けられ
ている。なお、上述した円周の１／２（１８０度）を−
組とした以外に、２の倍数の偶数を一組としたもの例え
ば円周の１／４ （９０度）１円周の１／８（４５度）
などにしても構わない。The cutting edge portion 11 of the embodiment shown in FIGS. 1 and 2 includes:
Inner cutter 13 with 1/2 (180 degrees) of its circumference as a set
．． Three types of blades, the middle blade 15 and the outer blade 17, are formed in order. Therefore, the inner cutter 13, the middle cutter 15 and the outer cutter 1
The height positions of the outer blades at 7 are gradually shortened in the axial direction of the cutter body 3, and the rear cutting blades are set at a height so as to cut the same height surface of the workpiece at the back. It is being Note that 1/2 (180 degrees) of the circumference mentioned above is -
In addition to sets, there are also sets of even numbers that are multiples of 2. For example, 1/4 of the circumference (90 degrees), 1/8 of the circumference (45 degrees)
It doesn't matter if you do something like that.
それぞれの切刃１３．１５および１７の回転方向前側に
は、前記したねじれ溝７と円筒部とを連通するガレッ１
〜部１３Ｇ、１５Ｇおよび１７Ｇが設けてある。On the front side in the rotational direction of each of the cutting blades 13, 15 and 17, there is a gullet 1 that communicates the above-mentioned helical groove 7 with the cylindrical portion.
~ portions 13G, 15G, and 17G are provided.
上述した各ガレット１３Ｇ、１５Ｇおよび１７Ｇはいず
れもねじれ溝７側に上向きに傾斜で設けてあって各切刃
１３．１５および１７による切粉１９がねじれ満７へ導
かれ、さらにねじれ溝７で第１図に示した環状穿孔刃物
１の上方へと移動させられて被加工材Ｗの上まで運ばれ
る。The above-mentioned gullets 13G, 15G, and 17G are all provided with an upward slope on the side of the helical groove 7, so that the chips 19 from the respective cutting edges 13, 15 and 17 are guided to the helical groove 7, and further in the helical groove 7. It is moved above the annular drilling blade 1 shown in FIG. 1 and carried above the workpiece W.
外刃１７の内壁部には切削油の切削品流入を助ける油溝
の役目をする裏リード溝２１が設けてある。第２図から
明らかなように、刃物本体の中心軸を中心として対称位
置の各分割部に切刃をそれぞれ設け、各対称位置の分割
部に配設される切刃をほぼ同寸同径とするように構成さ
れている。A back lead groove 21 is provided on the inner wall of the outer cutter 17 and serves as an oil groove for helping the flow of cutting oil into the cut product. As is clear from Fig. 2, cutting blades are provided in each divided portion at symmetrical positions with respect to the central axis of the cutter body, and the cutting blades arranged in divided portions at each symmetrical position are approximately the same size and the same diameter. is configured to do so.
第３図は第１図の内刃１３．中刃１５および外刃１７の
展開図で、３枚を一組とした切刃の下端 、面は水平
面と接触角度αが２〜５度の内刃１３から外刃１７に向
かって高くなる中高弧線上にある。Figure 3 shows the inner blade 13 of Figure 1. This is a developed view of the middle cutter 15 and the outer cutter 17. The lower end of the cutting blades, which are a set of three, has a contact angle α of 2 to 5 degrees with the horizontal surface. It is on the arc.
第３図を左側からみた第４図では同じ３枚セットの切刃
の下端面がコンケープ曲面（中凹み曲面）をなす並行状
態にある。In FIG. 4, viewed from the left side of FIG. 3, the lower end surfaces of the same set of three cutting blades are in a parallel state forming a concave curved surface (center concave curved surface).
さらに、第４図に明らかなように、内刃１３゜中刃１５
の外側下方はコンケープ曲面によって下側が削りとられ
ていて、中刃１５は外刃１７の２／の切刃幅を、内刃１
３は外刃１７のほぼ１／３の切刃幅を持たせである。Furthermore, as is clear from Fig. 4, the inner blade 13° and the middle blade 15
The lower outer side of the inner cutter 15 is shaved off by a concave curved surface, and the middle cutter 15 has a cutting edge width of 2/2 of the outer cutter 17.
3 has a cutting edge width approximately ⅓ of the outer cutter 17.
なお、第５図に示したのは例えば第４図の内刃１３を下
からみた図で、前記したように内気１３の下面も斜線で
示した削りとられた部分もともにコンケープ曲面である
。したがって、第４図に見られるように各切刃１３．１
５および１７はいずれも刃物本体３の半径外方に傾斜し
た片剣先刃をなしている。5 is a view of the inner cutter 13 shown in FIG. 4, for example, viewed from below, and as described above, both the lower surface of the inner cutter 13 and the shaved portion indicated by diagonal lines are concave curved surfaces. Therefore, as seen in FIG. 4, each cutting edge 13.1
5 and 17 both form single-pointed blades that are inclined outward in the radius of the cutter body 3.
また各切刃１３．１５および１７の側面逃げ面は研削砥
石の外周が規制する内凸曲面となっている。Further, the side flank surfaces of each of the cutting edges 13, 15 and 17 are inwardly convex curved surfaces regulated by the outer periphery of the grinding wheel.
第６図に示したのは従来の切刃下面（Ａ）と本発明の切
刃下面（Ｂ）とを示したもので、本発明の切刃下面は前
記したようにコンケープ曲面である上に砥石目が切刃端
と平行な遠方を中心として回動で研削しである。したが
って、本発明は従来の（Ａ）と異なり刃先の研磨面が平
滑で切削中にチッピング現象がＪ３こらないのである。FIG. 6 shows the lower surface of the conventional cutting blade (A) and the lower surface of the cutting blade of the present invention (B). As mentioned above, the lower surface of the cutting blade of the present invention is a concave curved surface. Grinding is done by rotating the whetstone grains in a far distance parallel to the edge of the cutting edge. Therefore, in the present invention, unlike the conventional method (A), the polished surface of the cutting edge is smooth and the chipping phenomenon does not occur during cutting.
第７図は本発明における切削部の他の実施例を示づもの
である。第７図において、切削部１１には第２図に示し
たのと同様な円周の１／２（１８０度）を−組とした内
刃１３．中刃１５．外刃１７の３種類の刃が順番に形成
しである。それぞれの切刃１３．１５および１７の回転
方向前側には、前記したねじ溝７と円筒内部とを連通ず
るガレット部１３Ｇ、１５Ｇおよび１７Ｇが設けてある
。FIG. 7 shows another embodiment of the cutting part in the present invention. In FIG. 7, the cutting part 11 has an inner cutter 13 with a set of 1/2 (180 degrees) of the circumference similar to that shown in FIG. Middle blade 15. Three types of blades of the outer cutter 17 are formed in order. Gullet portions 13G, 15G, and 17G are provided on the front side of each of the cutting blades 13.15 and 17 in the rotational direction to communicate the thread groove 7 and the inside of the cylinder.
上記した各ガレット部１５Ｇと１７Ｇとは図示を省略し
であるがいずれもねじれ溝７側に上向き傾斜で設けてあ
って、各切刃１３．１５および１７により切粉１９がね
じれ溝７へと導かれ、実にねじれ溝７で第１図に示した
環状穿孔刃物１の上方へと移動させられて被加工物Ｗの
上まで運ばれる。The above-mentioned gullet parts 15G and 17G are not shown, but are provided with an upward slope toward the helical groove 7, and the cutting edges 13.15 and 17 prevent the chips 19 from entering the helical groove 7. In fact, it is guided by the helical groove 7 and moved above the annular punching blade 1 shown in FIG. 1, and is carried above the workpiece W.
前記したように切削部１１は内刃１３．中刃１５および
外刃１７を一組として構成されているが、刃物本体３は
全体として内外周面が切込み方向（軸方向）に切込み逃
げ角θ１を備えている。As described above, the cutting part 11 has the inner cutter 13. Although the inner and outer cutters 15 and 17 are constructed as a set, the cutter body 3 as a whole has a cutting clearance angle θ1 in the cutting direction (axial direction) on the inner and outer circumferential surfaces thereof.
さらに、本実施例の環状穿孔刃物１は内刃１３゜中刃１
５および外刃１７とも内側の刃高が外側の刃高に対して
Δαだ【プ短く構成してあり、角度θ２だけ第７図では
右上りに高く構成しである。Furthermore, the annular perforating cutter 1 of this embodiment has an inner cutter of 13° and a middle cutter of 1
Both the inner cutter 5 and the outer cutter 17 are constructed so that the inner cutter height is shorter than the outer cutter height by Δα, and are made higher by an angle θ2 toward the upper right in FIG.
したがって、第７図で例示した切粉１９は、切刃１３の
半径方向良さの薄く板状の図示のように外側下りの傾斜
をしており、例えば渦を画いて巻きあがると破線矢印２
３のような方向に排出されることになる。Therefore, the chips 19 illustrated in FIG. 7 have a thin, plate-like shape in the radial direction of the cutting edge 13 and are inclined outwardly downward, for example, when they roll up in a vortex, the broken line arrow 2
It will be ejected in the direction shown in 3.
以上のごとき実施例の説明から理解されるように、本発
明は請求の範囲に記載した構成となっているから、求芯
性が良く穿孔精度が穿孔機のスピンドルなどの振れに影
響されずに良好で必要な精度を確保でき、かつ面粗度も
良好である。As can be understood from the description of the embodiments described above, since the present invention has the structure described in the claims, the centripetal property is good and the drilling accuracy is not affected by the runout of the spindle of the drilling machine. The required accuracy can be ensured, and the surface roughness is also good.
特に、本発明は小径の刃物の求心性と切削分割性に顕著
な効果が発揮される。また重ね切りも可能である。In particular, the present invention exhibits remarkable effects on the centripetal properties and cutting splitting properties of small-diameter blades. It is also possible to cut in layers.
本発明によると先行刃はもちろんのこと次の刃も先端は
剣先となっているから、けがき性が良い。According to the present invention, not only the preceding blade but also the following blade have a sword tip, which provides good scribing performance.
また、先行刃の接地が対面なので喰い何時のバランスが
保てやすくなっている。Also, since the leading blade is facing the ground, it is easier to maintain balance when eating.
しかも、本発明によると切屑が細く形成されるので発熱
が少なくて済み、したがって溶着するようなことが全く
なくなるのである。Moreover, according to the present invention, since the chips are formed into thin pieces, less heat is generated, and therefore welding does not occur at all.
第１図は本発明の環状穿孔刃物を示す斜視図である。
第２図は第１図における下面拡大部分図である。
第３図は刃物本体先端の各切刃の展開図である。
第４図は本発明の穿孔作業中の一部断面図である。
第５図は第４図の下面図である。
第６図は切刃の砥石目を示した説明図である。
第７図は本発明にお【ノる切削部の他実施例を示した説
明図である。
（図面の主要部を表わす符号の説明）
１・・・環状穿孔刃物
３・・・刃物本体
１１・・・切削部
１３・・・内刃
１５・・・中刃
１７・・・外刃
１つ・・・切り屑
２１・・・褒リード溝
第１図
第２図FIG. 1 is a perspective view showing an annular punching cutter of the present invention. FIG. 2 is an enlarged partial view of the bottom surface of FIG. 1. FIG. 3 is a developed view of each cutting edge at the tip of the blade body. FIG. 4 is a partial sectional view during the drilling operation of the present invention. FIG. 5 is a bottom view of FIG. 4. FIG. 6 is an explanatory diagram showing the grindstone grain of the cutting blade. FIG. 7 is an explanatory diagram showing another embodiment of the cutting part according to the present invention. (Explanation of symbols representing main parts of the drawings) 1... Annular perforating knife 3... Cutting tool body 11... Cutting section 13... Inner cutter 15... Middle cutter 17... One outer cutter ... Chips 21 ... Lead groove Fig. 1 Fig. 2
Claims (5)
に偶数の領域に分割して、刃物本体の中心軸を中心とし
て対称位置に各分割部に切刃をそれぞれ設け、各対称位
置の分割部に配設される切刃をほぼ同寸同径とすること
を特徴とする環状穿孔刃物(1) The central angle of the cutting edge setting part at the tip of the cylindrical blade body is divided equally into an even number of areas, and the cutting blades are provided in each divided part at symmetrical positions with respect to the central axis of the blade body. An annular perforating knife characterized in that the cutting blades disposed at the divided portions have approximately the same size and diameter.
の切刃の回転軌跡はそれぞれ異なる形状寸法で描かれて
いることを特徴とする特許請求の範囲第１項に記載の環
状穿孔刃物(2) An annular perforation according to claim 1, wherein rotation trajectories of the cutting blades of the adjacent divided portions provided in each of the even-numbered regions are drawn with different shapes and dimensions. cutlery
体の回転方向に沿って前記刃物本体の軸方向に順次短か
くし、後方の切刃ほどおくれて被切削材の同一の高さ面
を切削するように高さの差をつけて設けたことを特徴と
する特許請求の範囲第２項に記載の環状穿孔刃物(3) The height positions of the cutting blades of the adjacent divided parts are gradually shortened in the axial direction of the cutter body along the rotation direction of the cutter body, and the cutting blades at the rear are set further back so that the same height of the material to be cut is set. An annular punching cutter according to claim 2, characterized in that the cutter is provided with a difference in height so as to cut a cutting surface.
の回転方向に沿って順次前記刃物本体の外側に移行する
ようにし、かつ各切刃の切削幅をほぼ同一にしたことを
特徴とする特許請求の範囲第２項に記載の環状穿孔刃物(4) The cutting width of the cutting blades of the adjacent divided portions is made to gradually shift to the outside of the blade body along the rotation direction of the blade body, and the cutting width of each cutting blade is approximately the same. An annular perforating cutter according to claim 2, which is characterized by:
心側の刃高が外周側よりも低くなり両剣先を有している
ことを特徴とする特許請求の範囲第２項に記載の環状穿
孔刃物(5) The blade height of the cutting edge of the adjacent divided portions on the axial center side in the radial direction is lower than on the outer peripheral side and has a double-edged tip. circular perforation knife
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009836A JPH0710447B2 (en) | 1986-01-22 | 1986-01-22 | Annular drilling blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009836A JPH0710447B2 (en) | 1986-01-22 | 1986-01-22 | Annular drilling blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62173109A true JPS62173109A (en) | 1987-07-30 |
| JPH0710447B2 JPH0710447B2 (en) | 1995-02-08 |
Family
ID=11731210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61009836A Expired - Fee Related JPH0710447B2 (en) | 1986-01-22 | 1986-01-22 | Annular drilling blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710447B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002370115A (en) * | 2001-06-14 | 2002-12-24 | Omi Kogyo Co Ltd | Hole cutter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949844A (en) * | 1982-09-10 | 1984-03-22 | Kiyataraa Kogyo Kk | Production of catalyst for cleaning up exhaust gas of internal combustion engine |
-
1986
- 1986-01-22 JP JP61009836A patent/JPH0710447B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949844A (en) * | 1982-09-10 | 1984-03-22 | Kiyataraa Kogyo Kk | Production of catalyst for cleaning up exhaust gas of internal combustion engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002370115A (en) * | 2001-06-14 | 2002-12-24 | Omi Kogyo Co Ltd | Hole cutter |
| JP4644388B2 (en) * | 2001-06-14 | 2011-03-02 | 大見工業株式会社 | Hole cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0710447B2 (en) | 1995-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |