JPS6314961Y2 - - Google Patents
Info
- Publication number
- JPS6314961Y2 JPS6314961Y2 JP1983080623U JP8062383U JPS6314961Y2 JP S6314961 Y2 JPS6314961 Y2 JP S6314961Y2 JP 1983080623 U JP1983080623 U JP 1983080623U JP 8062383 U JP8062383 U JP 8062383U JP S6314961 Y2 JPS6314961 Y2 JP S6314961Y2
- Authority
- JP
- Japan
- Prior art keywords
- protrusion
- cutting edge
- chips
- front cutting
- chip
- 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
Links
- 230000000630 rising effect Effects 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 102220358403 c.89C>G Human genes 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004544 spot-on Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
Description
〔産業上の利用分野〕
本考案は、溝切りバイト用スローアウエイチツ
プの切屑処理性の改良に関する。
〔従来の技術とその問題点〕
溝切りバイトを用いた深溝入れ加工では、溝幅
に対して切込み深さが深くなるため、切屑が折れ
ずに長く延び出し、工具に巻き付くなどの不都合
な事態が生じることが多い。その対策として従来
の深溝入れバイトでは、すくい面上に前切刃と平
行な傾斜障壁を付し、この障壁によつて流れ出る
切屑に方向性をもたせたり、切屑をコイル状にカ
ールさせる方法が採られてきた。
しかしながら、前切刃と平行な障壁を設けるだ
けでは切屑を折損させることができないので、そ
の完全な処理を期待できない。何故なら、通常の
溝切り加工における切屑は溝幅と同一幅で発生す
る。ところが、障壁に当たつた切屑は幅方向に均
一なブレーキング力を受けるので幅方向に殆ど変
形せず、両側部が溝側面に接触しながら排出され
る。そのため、切削抵抗を大きくしたり、切削面
に傷を付けて面粗度を悪くしたりする。
また、溝広げ加工時は、前切刃の一部から、巾
が狭く一層折れ難くなつた切屑が排出されるか又
は横切刃部から90゜方向の異なる切屑が排出され
るが、前切刃と並行な障壁は、このような場合、
殆ど役に立たない。特に横切刃を使う際は切屑に
カール力を与えることができず、逆にそれを溝の
対向面に突き当たる方向に案内することになる。
なお、実開昭52−114484号公報には、上記傾斜
障壁の中央部に障壁を分断する凹部を設けて切屑
処理性を良くする技術が示されているが、このチ
ツプは、前切刃からの狭巾の切屑には、傾斜障壁
のみで対処することになるため効果が薄く、ま
た、横切刃からの切屑に対しては殆ど処理能力が
ない。
本考案は、広い範囲において切屑を良好に処理
できるスローアウエイチツプ、詳しくは、前切刃
の全体を使用する場合は勿論、前切刃の一部又は
横切刃を使用する溝広げ加工時にも従来チツプに
勝る切屑処理効果を期待し得る溝切りバイト用の
スローアウエイチツプを提供することを目的とし
ている。
〔問題点を解決するための手段〕
この考案のスローアウエイチツプの特徴部は、
すくい面の中央部に、斜め上方に向かつて緩やか
に又は直線的に立ち上がる面を有し、前切刃から
その立ち上がり面迄の距離は横切刃側に行くに従
つて次第に前切刃から遠ざかるよう巾方向に左右
対称に変化している突起を設け、さらに、この突
起の後方両側に、該突起と同一高さで立ち上がり
面が前切刃と平行又は横切刃側に行くに従つて次
第に前切刃から遠のく補助突起を設けたところに
ある。
即ち、チツプのすくい面上に突起を設ければ、
それが切屑のブレーカとなることは良く知られて
いるが、上述の突起は、切屑に対し巾方向に均一
なブレーキング力を与えるのではなく、中心部で
強く、両側部で弱い力を与える。従つて切屑は、
先ず、逆Ｖ字形に屈曲し、これによつて巾が実質
的に溝幅よりも小さくなるため、切屑の溝側壁へ
の接触が起こらない。また、この後、切屑は補助
突起の立ち上がり面に当たり、ここで上向きのカ
ール力が与えられて良好にカールし、場合によつ
ては小さく分断される。さらに、かかる突起は、
横切刃からの距離も軸方向各部において変化する
ため、横切刃を使う溝拡げ加工時の切屑にもカー
ル力と巾方向に異なる歪力を加える。よつて横切
刃より生成された切屑の溝の対向側面への突き当
たりも無くなる。
〔実施例〕
以下、添付図に基づいて本考案の実施例を説明
する。
第１図及び第２図に示すスローアウエイチツプ
１は、すくい面２上に好ましく球面状又は截頭円
錐状の突起３を独立して２個以上設けたもので、
突起の１個は前切刃４に近接してすくい面の中央
部に配置され、残りの突起はその後方においてす
くい面の軸方向２等分線を中心に左右対称に配置
されている。このチツプを用いた通常の溝切り加
工では、前切刃４から生成された切屑Ａが、すく
い面中央の突起に突き当たつて第１図鎖線で示す
方向にカールすると同時に、第２図鎖線で示すよ
うに逆Ｖ字形に屈曲する。従つて、切屑は非常に
折れ易い歪を受け細かく分断されるのである。同
様に前切刃の一部を使用する溝拡げ加工時の切屑
も両サイドの突起に当たつて分断される。また、
横切刃５から生成された切屑も、前後の突起の相
乗作用によりカール力と折れ易い歪を受け良好に
処理される。なお、図中Ｂはホルダ、Ｃはクラン
プ駒を示す。
第３図乃至第５図に示すスローアウエイチツプ
１０は、すくい面１２の中央部に、立ち上がり面
１３ａが円弧状の不完全円突起１３を設け、さら
に、この突起の両側部を、立ち上がり面１６ａが
前切刃１４と平行で斜め上方に直線的に後退する
突起１６を横切刃１５の部分迄連設して補つたも
ので、第１実施例のチツプと同様の効果が得られ
る。
第６図に示すチツプ２０は、すくい面２２上に
第２実施例の中心突起の面１３ａ（第４図）と同
様の曲面の立ち上がり面２３ａを有する不完全円
突起２３を設け、その両側に連設した補助突起２
６の立ち上がり面２６ａ（この面２６ａは第５図
の面１６ａと同様に傾斜して立ち上つている）を
外側に向かつて斜め後方に後退させ、溝拡げ加工
時の切屑処理性能をより一層向上させたものであ
る。
このチツプ２０は、前切刃２４から生成された
切屑がまず、面２３ａに当り、第２図のように逆
Ｖ字形に屈曲して両側縁がチツプ中心側に寄るの
で加工後の溝面を傷付けない。また、逆Ｖ字形に
なつた切屑は、この後、両サイドが面２６ａに当
つてブレーキング歪を受け、上向きに強制的にカ
ールせしめられる。ここで、もし、すくい面中央
部にのみ球状の突起があるとしたら、つまり、図
の面２３ａのみしか存在しなかつたとしたら、切
屑は逆Ｖ字形になつたまま長く延び出し、うまく
処理されない。また、面２６ａが面１３ａに接続
角のつかない状態につながつているとしたら、切
屑を逆Ｖ字形にする力が弱まる（これは前切刃２
４に対する面２６ａの傾斜角が小のとき）か又は
その後に与えるカールのためのブレーキング力が
弱まる（これは前記の傾斜角が大のとき）。
次に、横切刃２５を使う溝の巾広げ加工では、
生成された切屑が進行方向に位置する面２６ａと
２３ａに接して複雑なカール歪を受ける。即ち、
切屑は先ず、図において手前側の切刃２５から流
れ出すとすると、右側縁部が面２６ａに当たる
が、このとき、左側縁部側はブレーキング力を受
けておらず、従つて面２６ａにより進行方向後方
に巻き返すようなカール力を受けると同時に流出
方向を面２６ａに直角に対向する方向に変えるよ
うなねじり力を受け、その後、左側縁部が面２３
ａに当たり、面２３ａ，２６ａの接続点に対して
は非接触状態になるために巾方向にＶ字形に屈曲
する歪も受け、この複数の歪の組み合わせによつ
て良好にカールし或いは分断される。第３図のチ
ツプであると、突起１３のみによるブレーキング
力の付与となるので、横切刃を用いる場合の切屑
処理性は第６図のチツプには及ばない。
第１表に、第６図のチツプとそのチツプの面２
６ａがなく２３ａのみが存在する比較チツプを用
いた通常の溝切り加工時の切屑処理性の比較結果
を示す。被削材はS30C（HB170）、φ50×250で、
切削速度100ｍ／分、溝巾５mmの加工条件である。
[Industrial Application Field] The present invention relates to improving the chip disposal properties of a throw-away tip for a groove cutting tool. [Conventional technology and its problems] In deep grooving using a grooving tool, the depth of cut is greater than the width of the groove. Situations often occur. As a countermeasure to this problem, conventional deep grooving tools have a method of attaching an inclined barrier on the rake face parallel to the front cutting edge, and using this barrier to give directionality to the chips flowing out, or to curl the chips into a coil shape. I've been exposed to it. However, simply providing a barrier parallel to the front cutting edge does not break the chips, so complete disposal cannot be expected. This is because chips in normal grooving are generated with the same width as the groove width. However, since the chips that hit the barrier are subjected to a uniform braking force in the width direction, they are hardly deformed in the width direction, and are ejected while their both sides are in contact with the side surfaces of the groove. Therefore, the cutting resistance is increased or the cut surface is damaged, resulting in poor surface roughness. Also, during groove widening, chips with a narrower width and more difficult to break are ejected from a part of the front cutting edge, or chips with a different angle of 90 degrees are ejected from the side cutting edge. In such cases, the barrier parallel to the blade is
Almost useless. In particular, when using a cross-cutting blade, it is not possible to apply a curling force to the chips, but instead the chips are guided in the direction where they hit the opposite surface of the groove. Incidentally, Japanese Utility Model Application Publication No. 52-114484 discloses a technique for improving chip disposal by providing a recess in the center of the inclined barrier to divide the barrier. It is less effective for dealing with narrow-width chips because only the inclined barrier is used, and there is almost no processing capacity for chips from the side cutting edge. The present invention is a throw-away tip that can effectively process chips over a wide range of areas. Specifically, it can be used not only when the entire front cutting edge is used, but also during groove widening using a part of the front cutting edge or the side cutting edge. The object of the present invention is to provide a throw-away tip for a grooving tool that can be expected to have a better chip disposal effect than conventional tips. [Means for solving the problem] The features of the throw-away tip of this invention are as follows:
At the center of the rake face, there is a surface that rises diagonally upward and gently or linearly, and the distance from the front cutting edge to the rising surface gradually moves away from the front cutting edge as it goes toward the side edge. A protrusion that changes symmetrically in the width direction is provided, and furthermore, on both rear sides of this protrusion, a raised surface at the same height as the protrusion is parallel to the front cutting edge or gradually increases as it goes toward the side cutting edge. It is located where an auxiliary protrusion is provided that extends away from the front cutting edge. That is, if a protrusion is provided on the rake face of the chip,
It is well known that it acts as a chip breaker, but instead of applying a uniform braking force to the chip in the width direction, the protrusion applies a strong force at the center and a weak force at both sides. . Therefore, the chips are
First, it is bent into an inverted V shape, which makes the width substantially smaller than the groove width, so that no chips come into contact with the groove sidewalls. Further, after this, the chips hit the rising surfaces of the auxiliary protrusions, where an upward curling force is applied to the chips, causing them to curl well and, depending on the case, being broken into small pieces. Furthermore, such protrusions are
Since the distance from the cross-cutting blade also changes at each part in the axial direction, different curling forces and strain forces in the width direction are applied to the chips during groove expansion using the cross-cutting blade. This eliminates the possibility of chips generated by the side blades hitting the opposite side surfaces of the groove. [Example] Hereinafter, an example of the present invention will be described based on the attached drawings. The throw-away tip 1 shown in FIGS. 1 and 2 has two or more preferably spherical or truncated conical projections 3 independently provided on the rake face 2.
One of the protrusions is arranged in the center of the rake face close to the front cutting edge 4, and the remaining protrusions are arranged laterally symmetrically about the axial bisector of the rake face behind it. In normal grooving using this chip, chips A generated from the front cutting edge 4 hit the protrusion at the center of the rake face and curl in the direction shown by the chain line in Figure 1, while simultaneously It is bent into an inverted V shape as shown in . Therefore, the chips are subjected to strain that makes them very easy to break and are broken into small pieces. Similarly, chips during groove widening using a portion of the front cutting edge also hit the protrusions on both sides and are separated. Also,
The chips generated from the side blade 5 are also subjected to curling force and breakable strain due to the synergistic effect of the front and rear protrusions, and are processed well. In addition, in the figure, B indicates a holder and C indicates a clamp piece. The throw-away tip 10 shown in FIGS. 3 to 5 is provided with an incomplete circular protrusion 13 having an arcuate rising surface 13a in the center of the rake face 12, and furthermore, both sides of this protrusion are connected to the rising surface 16a. This is supplemented by a protrusion 16 that is parallel to the front cutting edge 14 and recedes diagonally upward in a straight line up to the side edge 15, and the same effect as the tip of the first embodiment can be obtained. The chip 20 shown in FIG. 6 is provided with an incomplete circular projection 23 having a curved rising surface 23a similar to the surface 13a of the central projection of the second embodiment (FIG. 4) on the rake surface 22, and on both sides thereof. Continuous auxiliary protrusion 2
The rising surface 26a of No. 6 (this surface 26a is inclined and rising like the surface 16a in FIG. 5) is directed outward and receded obliquely to the rear, further improving chip disposal performance during groove widening. This is what I did. In this chip 20, chips generated from the front cutting edge 24 first hit the surface 23a, and as shown in FIG. Don't hurt. Further, the chips that have formed into an inverted V shape are then subjected to breaking strain as both sides thereof come into contact with the surface 26a, and are forcibly curled upward. If there is a spherical protrusion only in the center of the rake face, that is, if only the surface 23a in the figure exists, the chips will remain in an inverted V shape and extend for a long time, and will not be processed properly. Furthermore, if the surface 26a is connected to the surface 13a without a connection angle, the force that forms the chip into an inverted V-shape will be weakened (this is due to the fact that the front cutting edge 2
4) or the subsequent braking force for curling is weakened (this is the case when the aforementioned angle of inclination is large). Next, when widening the groove using the side blade 25,
The generated chips come into contact with the surfaces 26a and 23a located in the advancing direction and are subjected to complicated curl distortion. That is,
Assuming that the chips first flow out from the cutting blade 25 on the near side in the figure, the right side edge will hit the surface 26a, but at this time, the left side edge side is not receiving the braking force, and therefore the chips flow in the advancing direction due to the surface 26a. At the same time as it receives a curling force that causes it to roll back, it also receives a twisting force that changes the outflow direction to a direction perpendicular to the surface 26a.
Since it is in a non-contact state with respect to the connecting point of surfaces 23a and 26a, it is also subjected to strain that causes it to bend in a V-shape in the width direction, and due to the combination of these multiple strains, it is curled or split in a good manner. . In the case of the chip shown in FIG. 3, the braking force is applied only by the protrusion 13, so the chip disposability when using a side blade is not as good as that of the chip shown in FIG. 6. Table 1 shows the chip in Figure 6 and the side 2 of the chip.
The results of a comparison of chip disposability during normal grooving using a comparative chip in which 6a is absent and only 23a is present are shown. The workpiece material is S30C (H B 170), φ50×250,
The machining conditions were a cutting speed of 100 m/min and a groove width of 5 mm.
以上説明したように、本考案のスローアウエイ
チツプは、すくい面中央部の突起とその後方の両
側の補助突起が、広い切削範囲において切屑に折
れ易い歪を与えかつ切屑の巾を縮めるので、切屑
は細かく分断され、溝側面に接触しながらの流出
も防止される。
また、切屑の溝側面への接触が無くなることに
加え、中央の突起に対する切屑の接触もほぼ点当
たりとなるため切削抵抗も小さく、従つて、加工
面の面粗度が良好で切屑詰まり等の起こらない溝
切り又は溝拡げ加工が可能になる。
特に、補助突起の立ち上がり面の位置が前切刃
に対して徐々に変化したものは、前切刃の狭巾の
切屑もうまく処理でき、また、その立ち上がり面
が前切刃と平行のものも、中央の突起が補助突起
よりも前方に張り出しているため、横切刃からの
切屑の処理に優れた効果を発揮する。
As explained above, in the throw-away tip of the present invention, the protrusion at the center of the rake face and the auxiliary protrusions on both sides of the rake face give the chips a strain that makes them easy to break over a wide cutting range and reduce the width of the chips. is divided into small pieces to prevent it from flowing out while contacting the groove sides. In addition, in addition to eliminating the contact of chips with the groove side surfaces, the contact of chips with the central protrusion is almost spot-on, so the cutting resistance is small. Therefore, the surface roughness of the machined surface is good and there is no possibility of chip clogging, etc. It becomes possible to perform groove cutting or groove widening processing that does not occur. In particular, the position of the rising surface of the auxiliary protrusion gradually changes with respect to the front cutting edge, and it is possible to handle chips with a narrow width on the front cutting edge. Since the central protrusion protrudes further forward than the auxiliary protrusions, it is highly effective in removing chips from the cross-cutting blade.
第１図は、本スローアウエイチツプの一実施例
をホルダに装置した状態を示す斜視図、第２図は
そのＸ−Ｘ線に沿つた断面図、第３図は他の実施
例を示す斜視図、第４図は同上のＹ−Ｙ線に沿つ
た断面図、第５図は同じくＺ−Ｚ線に沿つた断面
図、第６図はさらに他の実施例を示す断面図であ
る。
１，１０，２０……スローアウエイチツプ、
２，１２，２２……すくい面、３，１３，２３…
…突起、４，１４，２４……前切刃、５，１５，
２５……横切刃、１６，２６……補助突起。
Fig. 1 is a perspective view showing one embodiment of the present throwaway chip installed in a holder, Fig. 2 is a sectional view taken along the line X-X, and Fig. 3 is a perspective view showing another embodiment. FIG. 4 is a cross-sectional view taken along the Y--Y line, FIG. 5 is a cross-sectional view taken along the Z--Z line, and FIG. 6 is a cross-sectional view showing still another embodiment. 1, 10, 20... Throwaway tip,
2, 12, 22... rake face, 3, 13, 23...
...Protrusion, 4,14,24...Front cutting edge, 5,15,
25... Side blade, 16, 26... Auxiliary protrusion.
Claims (1)
やかに又は直線的に立ち上がる面を有し、前切
刃からその立ち上がり面迄の距離は横切刃側に
行くに従つて次第に前切刃から遠ざかるよう巾
方向に左右対称に変化している突起を設け、さ
らに、この突起の後方面側に、該突起と高さが
同一で立ち上がり面は前切刃と平行又は横切刃
側に行くに従つて次第に前切刃から遠のく補助
突起を設けて構成される溝切りバイト用スロー
アウエイチツプ。 (2) 上記突起と補助突起が独立して設けられてい
ることを特徴とする実用新案登録請求の範囲第
(1)項記載の溝切りバイト用スローアウエイチツ
プ。 (3) 上記突起と補助突起が一体に連設され、か
つ、補助突起の外端はチツプの側部に至つてい
ることを特徴とする実用新案登録請求の範囲第
(1)項記載の溝切りバイト用スローアウエイチツ
プ。[Scope of Claim for Utility Model Registration] (1) The rake face has a surface in the center that rises diagonally upward and gently or linearly, and the distance from the front cutting edge to the rising surface is on the side edge side. A protrusion is provided that changes symmetrically in the width direction so that it gradually moves away from the front cutting edge as it goes to the front.Furthermore, on the rear side of this protrusion, the height is the same as that of the protrusion, and the rising surface is the same as the front cutting edge. A throw-away tip for a grooving tool consisting of an auxiliary protrusion that gradually moves away from the front cutting edge as it goes parallel to or toward the side edge. (2) The scope of the utility model registration claim is characterized in that the above protrusion and the auxiliary protrusion are provided independently.
Throwaway tip for groove cutting tool described in (1). (3) The scope of the utility model registration claim characterized in that the above protrusion and the auxiliary protrusion are integrally connected, and the outer end of the auxiliary protrusion reaches the side of the chip.
Throwaway tip for groove cutting tool described in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8062383U JPS59188105U (en) | 1983-05-28 | 1983-05-28 | Throw-away tip for grooving tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8062383U JPS59188105U (en) | 1983-05-28 | 1983-05-28 | Throw-away tip for grooving tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59188105U JPS59188105U (en) | 1984-12-13 |
| JPS6314961Y2 true JPS6314961Y2 (en) | 1988-04-26 |
Family
ID=30210609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8062383U Granted JPS59188105U (en) | 1983-05-28 | 1983-05-28 | Throw-away tip for grooving tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59188105U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111730079A (en) * | 2020-07-21 | 2020-10-02 | 北京沃尔德金刚石工具股份有限公司 | Novel chip breaking table slot cutter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114484U (en) * | 1976-02-27 | 1977-08-31 | ||
| JPS5841049Y2 (en) * | 1982-04-07 | 1983-09-16 | 三菱マテリアル株式会社 | Throwaway tip |
-
1983
- 1983-05-28 JP JP8062383U patent/JPS59188105U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59188105U (en) | 1984-12-13 |
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