JPH077802U - Throwaway Tip for Inner Diameter Processing - Google Patents
Throwaway Tip for Inner Diameter ProcessingInfo
- Publication number
- JPH077802U JPH077802U JP3594093U JP3594093U JPH077802U JP H077802 U JPH077802 U JP H077802U JP 3594093 U JP3594093 U JP 3594093U JP 3594093 U JP3594093 U JP 3594093U JP H077802 U JPH077802 U JP H077802U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- cutting edge
- circle
- inner diameter
- throw
- 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
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
(57)【要約】
【構成】 略円柱状をなすホルダ2の先端部の端面にね
じ止めされるスローアウェイチップ1であって、該チッ
プ1は平面視において、外径3の一部がチップ1の固定
中心Mより離れた中心Nを有する円の180°以上の外
周Lと重なり合い、且つ切刃部4の先端5が上記円の外
径L上或いはその近傍に位置していることを特徴とする
内径加工用スローアウェイチップ1である。
【効果】 小径の穴の内径を加工でき、また、刃先強
度、チップ全体の強度が大きい。
(57) [Summary] [Structure] A throw-away tip 1 screwed to the end face of the tip of a holder 2 having a substantially cylindrical shape, the tip 1 having a part of an outer diameter 3 in plan view. 1 is overlapped with the outer periphery L of a circle having a center N apart from the fixed center M of 180 ° or more, and the tip 5 of the cutting edge portion 4 is located on or near the outer diameter L of the circle. It is the throw-away tip 1 for inner diameter processing. [Effect] The inner diameter of a small diameter hole can be machined, and the strength of the cutting edge and the strength of the entire tip are large.
Description
【0001】[0001]
本考案は、内径加工に用いられるスローアウェイインサートに関するものであ る。 The present invention relates to a throw-away insert used for inner diameter machining.
【0002】[0002]
従来より用いられている内径加工用スローアウェイチップとして、実開昭59 ー50606の考案の如く、角柱状のチップであって、ホルダー側のクランプ機 構によりホルダー先端に固定されるものや、実開昭61ー75909の考案の如 く、ホルダー先端面に固定されるチップであって、下端面にセレーションが形成 されるとともに側面より外方に刃先部分を突出させたチップがあった。 As the throw-away tip for internal diameter processing that has been conventionally used, a prismatic tip, which is fixed to the tip of the holder by a clamping mechanism on the holder side, as in the invention of the actual open Sho 59-50606. There was a tip fixed on the tip surface of the holder as in the invention of Kaisho 61-75909, in which serration was formed on the lower end surface and the tip of the blade was projected outward from the side surface.
【0003】[0003]
しかしながら、上記従来技術のうち前者は、機構上ホルダーが大径となり、小 径の穴の内径を加工することができなかった。 However, the former of the above prior arts has a mechanism in which the holder has a large diameter, so that the inner diameter of a small diameter hole cannot be machined.
【0004】 また、後者は刃先部分が側面より外方に突出した形状であって刃先部分の強度 が小さく、さらにこのチップで加工できる最小の径の穴に比し断面積が小さくな るのでチップ全体の強度も小さいという不具合があった。Further, the latter has a shape in which the cutting edge portion projects outward from the side surface, the strength of the cutting edge portion is small, and the cross-sectional area is smaller than that of a hole of the smallest diameter that can be processed with this chip, There was a problem that the overall strength was also small.
【0005】[0005]
上記課題を解決するため本考案は、略円柱状をなすホルダの先端部の端面にね じ止めされる構造とし、小径の穴の内径を加工できるようにするとともに、平面 視において、外径の一部がチップの固定中心より離れた中心を有する円の180 °以上の外周と重なり合い、且つ切刃部の先端が上記円の外径上或いはその近傍 に位置するデザインとすることによって、このチップで加工できる最小の径の穴 に比しチップの断面積を大きくして、刃先強度、チップ全体の強度ともに大きく した。 In order to solve the above-mentioned problems, the present invention has a structure in which it is screwed to the end surface of the tip of a holder having a substantially cylindrical shape so that the inner diameter of a small diameter hole can be machined and the outer diameter of the hole in plan view can be reduced. By designing a part of which overlaps with the outer circumference of 180 ° or more of a circle having a center distant from the fixed center of the tip, and the tip of the cutting edge is located on or near the outer diameter of the circle, this tip By increasing the cross-sectional area of the tip compared to the hole with the smallest diameter that can be machined, the strength of the cutting edge and the strength of the entire tip were increased.
【0006】[0006]
以下、本考案の実施例を図によって説明する。 図1は、本実施例のスローアウェイチップ(以下、チップと略称する)1を示 し、このチップ1は図2に示す略円柱状のホルダー2の先端部端面にねじ止めさ れた状態で、被削材に予め形成された穴の内径を加工するものであって、その形 状は、図1に示す如く、平面視において、外径3がチップ1の固定中心M(固定 用ボルト孔の中心)から間隙をおいた中心Nを有する円の180°以上の外周L と重なり合い(その部分において同じ円弧を描く)、且つ切刃部4の先端5が上 記円の外周L上又はその近傍に位置するようになっている。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a throw-away tip (hereinafter abbreviated as a tip) 1 of the present embodiment. The tip 1 is screwed to the end face of a substantially cylindrical holder 2 shown in FIG. As shown in FIG. 1, the outer diameter 3 is a fixed center M of the chip 1 (fixing bolt hole) in the plan view as shown in FIG. (The center of the circle) and the circumference L of a circle having a center N with a gap of 180 ° or more (the same arc is drawn in that part), and the tip 5 of the cutting edge 4 is on the circumference L of the circle or its It is located in the vicinity.
【0007】 なお、上記切刃部4の先端5は、上記円の外周L上に位置しない場合、1〜2 mm程度ほど外方に位置しても良い。When the tip 5 of the cutting edge portion 4 is not located on the outer circumference L of the circle, it may be located about 1 to 2 mm outward.
【0008】 また、上記チップ1の下面6には、一端のみが側面7に開口する溝である凹部 8が形成され、これがホルダー2の先端部端面に形成された対応する凸部(不図 示)に嵌合するようになっていて、チップ1の回転を防止している。Further, the lower surface 6 of the chip 1 is formed with a concave portion 8 that is a groove having only one end opening to the side surface 7, and this corresponds to a convex portion (not shown) formed on the end surface of the tip portion of the holder 2. ) To prevent the tip 1 from rotating.
【0009】 このように構成されるチップ1は、略円柱状をなすホルダ2の先端部端面にね じ止めされる構造としたので、小径の穴の内径を加工できる。Since the tip 1 configured as described above has a structure in which it is screwed to the end surface of the tip of the holder 2 having a substantially columnar shape, the inner diameter of a small diameter hole can be machined.
【0010】 さらに、平面視において、切刃部4の先端5と外径の一部がチップ1の固定中 心Mより離れて位置する中心Nを有する円の外周Lの少なくとも半分と重なり合 うようなデザインとなっているため、従来のチップに比べて水平断面積を少なく とも30%以上大きくすることができた。すなわち、同一の径の穴を加工する場 合に、本実施例のチップ1は従来のチップに比し、水平断面積を30%以上大き くすることができるので、チップ1全体の強度を大きくすることができるととも に、切刃部4が外方に大きく突出しないデザインであるので、切刃部4の強度も 大きい。なお、チップ1の外径3が上記中心Nを有する円の外周Lと180より 小さい角度で重なり合う場合は、従来のチップに比し、水平断面積が十分大きく ならず(30%より小さい)、強度が不十分となってしまう。Further, in plan view, the tip 5 of the cutting edge portion 4 and a part of the outer diameter overlap with at least half of the outer circumference L of a circle having a center N located away from the fixed center M of the tip 1. Due to such a design, the horizontal cross-sectional area could be increased by at least 30% or more compared to the conventional chip. That is, when processing holes having the same diameter, the chip 1 of this embodiment can have a horizontal cross-sectional area larger than that of the conventional chip by 30% or more, so that the strength of the entire chip 1 is increased. In addition to being able to do so, since the cutting edge portion 4 is designed not to project outward significantly, the strength of the cutting edge portion 4 is also large. When the outer diameter 3 of the tip 1 overlaps the outer circumference L of the circle having the center N at an angle smaller than 180, the horizontal cross-sectional area is not sufficiently large (smaller than 30%) as compared with the conventional tip. The strength becomes insufficient.
【0011】 また、チップ1の回転防止用に形成された上記凹部8は、一端のみが側面7に 開口する溝となっているので、通常のカギ溝による嵌合の場合のように、直径方 向にチップ1がズレる心配がなく、より正確な切削が可能となった。Further, since the concave portion 8 formed for preventing the rotation of the chip 1 is a groove whose one end is opened to the side surface 7, as in the case of the fitting by the usual key groove, There is no concern that the insert 1 will shift in the opposite direction, enabling more accurate cutting.
【0012】 図3は、他の実施例による2つの切刃部4を有するチップ1を示し、このチッ プ1は、平面視において点対称形をなすとともに、外径3の一部がチップ1の固 定中心Mから間隙をおいた中心N、Nを有する2つの円の少なくとも合計180 °以上の外周L、Lと重なり合い、且つ切刃部4の先端5が上記円の外周L、L 上、或いはその近傍に位置するようになっている。FIG. 3 shows a tip 1 having two cutting edge portions 4 according to another embodiment. The tip 1 has a point-symmetrical shape in a plan view and a part of the outer diameter 3 is a tip 1. Of the two circles having centers N, N spaced from the fixed center M of the above, overlaps with at least a total of 180 ° or more outer peripheries L, L, and the tip 5 of the cutting edge portion 4 is on the outer peripheries L, L of the circles. Alternatively, it is located in the vicinity.
【0013】 このような2枚刃のチップ1は、一方の刃部4が破損したとしても、他方の刃 部4でもって内径加工することができ、長い工具寿命が期待できるものであると ともに、切刃部4が外方に大きく突出しないデザインであるので、この部分の強 度が大きく、かつ水平断面積を大きくすることができるので、チップ1全体の強 度が大きい。With such a two-blade tip 1, even if one of the blade portions 4 is damaged, the other blade portion 4 can be used to machine the inner diameter, and a long tool life can be expected. Since the cutting edge portion 4 does not project to the outside greatly, the strength of this portion is large and the horizontal cross-sectional area can be increased, so that the strength of the entire chip 1 is large.
【0014】[0014]
以上のように、本考案のスローアウェイチップは、略円柱状をなすホルダの先 端部の端面にねじ止めされる構造としたので、小径の穴の内径を加工できる。 As described above, the throw-away tip of the present invention has a structure in which it is screwed to the end face of the front end of the holder having a substantially cylindrical shape, so that the inner diameter of a small diameter hole can be machined.
【0015】 また、上記チップは、平面視において、外径の一部がチップの固定中心より離 れた中心を有する円の180°以上の外周と重なり合い、且つ切刃部の先端が上 記円の外径上或いはその近傍に位置するデザインとしたことによって、このチッ プで加工できる最小の径の穴に比しチップの水平断面積が大きく、よって、刃先 強度、チップ全体の強度が大きい。In the plan view, the tip overlaps with the outer circumference of 180 ° or more of a circle having a part of the outer diameter separated from the fixed center of the tip, and the tip of the cutting edge part is the above circle. Since the design is located on or near the outer diameter of the tip, the horizontal cross-sectional area of the tip is larger than that of the hole with the smallest diameter that can be processed by this tip, so the strength of the cutting edge and the strength of the entire tip are large.
【図1】本考案実施例の一枚刃スローアウェイチップを
示し、(a)は上面図、(b)は側面図、(c)は下面
図である。FIG. 1 shows a single-blade throw-away tip according to an embodiment of the present invention, (a) is a top view, (b) is a side view, and (c) is a bottom view.
【図2】図1のスローアウェイチップを固定するホルダ
ーの側面図である。FIG. 2 is a side view of a holder for fixing the throw-away tip of FIG.
【図3】本考案実施例の二枚刃スローアウェイチップを
示し、(a)は上面図、(b)は側面図、(c)は下面
図である。FIG. 3 shows a two-blade throw-away tip according to an embodiment of the present invention, (a) is a top view, (b) is a side view, and (c) is a bottom view.
M 固定中心 N 円の中心 L 円の外周 1 スローアウェイチップ 2 ホルダー 3 外径 4 切刃部 5 先端 6 下面 7 側面 8 凸部 M Fixed center N Center of circle L Outer circumference of circle 1 Throw-away tip 2 Holder 3 Outer diameter 4 Cutting edge part 5 Tip 6 Bottom surface 7 Side surface 8 Convex part
Claims (2)
じ止めされるスローアウェイチップであって、該チップ
は平面視において、その外径が、チップの固定中心より
離れた中心を有する円の180°以上の外周と重なり合
い、且つ切刃部の先端が上記円の外径上或いはその近傍
に位置していることを特徴とする内径加工用スローアウ
ェイチップ。1. A throw-away tip screwed to the end surface of the tip of a substantially cylindrical holder, the tip having an outer diameter in plan view that is distant from the fixed center of the tip. A throw-away insert for inner diameter machining, characterized in that it overlaps with the outer periphery of a circle of 180 ° or more and the tip of the cutting edge portion is located on or near the outer diameter of the circle.
状に形成されてなることを特徴とする請求項1の内径加
工用スローアウェイチップ。2. The throw-away tip for inner diameter machining according to claim 1, wherein the two cutting edge portions are formed in a point-symmetrical shape in a plan view.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3594093U JPH077802U (en) | 1993-06-30 | 1993-06-30 | Throwaway Tip for Inner Diameter Processing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3594093U JPH077802U (en) | 1993-06-30 | 1993-06-30 | Throwaway Tip for Inner Diameter Processing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH077802U true JPH077802U (en) | 1995-02-03 |
Family
ID=12456017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3594093U Pending JPH077802U (en) | 1993-06-30 | 1993-06-30 | Throwaway Tip for Inner Diameter Processing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH077802U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015512798A (en) * | 2012-04-10 | 2015-04-30 | イスカル リミテッド | Left-handed and right-handed cutting tools |
-
1993
- 1993-06-30 JP JP3594093U patent/JPH077802U/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015512798A (en) * | 2012-04-10 | 2015-04-30 | イスカル リミテッド | Left-handed and right-handed cutting tools |
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