JPH0780783A - Tool for making center hole in polygonal form - Google Patents
Tool for making center hole in polygonal formInfo
- Publication number
- JPH0780783A JPH0780783A JP25105493A JP25105493A JPH0780783A JP H0780783 A JPH0780783 A JP H0780783A JP 25105493 A JP25105493 A JP 25105493A JP 25105493 A JP25105493 A JP 25105493A JP H0780783 A JPH0780783 A JP H0780783A
- Authority
- JP
- Japan
- Prior art keywords
- center hole
- tool
- dead center
- center
- tip
- 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
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000003754 machining Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000007429 general method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、工作機械により円筒
研削又は旋削加工を行なう際、ワ−クピ−スをデッドセ
ンタによって回転支持するため、ワ−クピ−スの端面に
設けられる円錐形状のセンタ穴を加工するための工具、
より詳しくはセンタ穴をポリゴン形状に創成するための
工具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conical shape provided on an end face of a work piece for rotatably supporting the work piece by a dead center when performing cylindrical grinding or turning with a machine tool. Tool for machining the center hole,
More specifically, it relates to a tool for creating a center hole in a polygonal shape.
【０００２】[0002]
【従来の技術】センタ穴ドリルによって形成前述のセン
タ穴は、断面形状が円形であるが、この円形の真円度い
かんによって、円筒研削又は旋削加工の精度が左右され
る。そしてセンタ穴の一般的な加工方法は、センタ穴ド
リルにより行なわれ、加工後焼入れされる場合がある。2. Description of the Related Art Formed by a center hole drill The aforementioned center hole has a circular cross-sectional shape, and the accuracy of cylindrical grinding or turning depends on the circularity of this circle. A general method for processing the center hole is performed by a center hole drill, and it may be hardened after processing.
【０００３】そのためセンタ穴加工によるセンタ穴の真
円度誤差、これに加えて焼入れを行なう場合には焼入れ
による歪誤差が発生し、この真円度誤差がワ−クピ−ス
の高精度の回転が得られない原因となり、円筒研削又は
旋削加工精度を低下させていた。Therefore, a circularity error of the center hole due to the machining of the center hole and a distortion error due to the quenching occur when quenching is performed, and this circularity error causes a highly accurate rotation of the work piece. And the accuracy of cylindrical grinding or turning was reduced.
【０００４】[0004]
【発明が解決しようとする課題】この発明が解決しよう
とする課題は、従来技術が円錐形状のセンタ穴が円形で
あるため、この真円度誤差がワ−クピ−スの加工精度を
低下させていたことに鑑み、センタ穴ドリルにより形成
されセンタ穴を加工して、デッドセンタを３点支持させ
ることにある。The problem to be solved by the present invention is that, in the prior art, since the conical center hole is circular, this roundness error reduces the working accuracy of the work piece. In view of the above, the center hole formed by the center hole drill is machined to support the dead center at three points.
【０００５】[0005]
【課題を解決するための手段】この発明の工具の特徴
は、柄２の先端に設けられた刃先３が、全体として円錐
形状に形成されており、刃先３の基部４から先端５へ向
かって、３個の扇形状の平面７が側面６の内側へ形成さ
れている点にある。The tool of the present invention is characterized in that the cutting edge 3 provided at the tip of the handle 2 is formed in a conical shape as a whole, and the cutting edge 3 extends from the base 4 toward the tip 5. The point is that three fan-shaped planes 7 are formed inside the side surface 6.
【０００６】[0006]
【作用】センタ穴ドリルでワ−クピ−スの端面に設けた
センタ穴に、この工具を押圧又はハンマリングによる衝
撃荷重を与えると、図３、図４で示すように、３個の側
面６がセンタ穴１１にクリ−プ変形を与え、デッドセン
タとの間に３個の逃げ面１２と、３個のデッドセンタ支
持面１３とを創成できる。When a shock load is applied to the center hole formed on the end face of the work piece by the center hole drill by pressing or hammering, as shown in FIGS. Gives a creep deformation to the center hole 11, and three flanks 12 and three dead center support surfaces 13 can be created between the center hole 11 and the dead center.
【０００７】[0007]
【実施例】図１及び図２に於いて、１はこの発明に係る
工具で、２は柄、３は刃先である。この刃先３は全体と
して円錐形状に形成されており、刃先３の基部４から先
端５へ向かって、側面６の内側へ３個の扇形状の平面７
が、等間隔に形成されている。図２で示すように刃先３
の横断面はほぼポリゴン状を形成し、円弧部分８の中心
角と直線部分９の中心角はそれぞれ等しい。1 and 2, 1 is a tool according to the present invention, 2 is a handle, and 3 is a cutting edge. The cutting edge 3 is formed in a conical shape as a whole, and three fan-shaped planes 7 are formed inside the side surface 6 from the base 4 of the cutting edge 3 toward the tip 5.
Are formed at equal intervals. The cutting edge 3 as shown in FIG.
Has a polygonal shape, and the central angle of the arc portion 8 and the central angle of the linear portion 9 are equal to each other.
【０００８】なおセンタ穴にクリ−プ変形を与えて、デ
ンドセンタとの間に３個の逃げ面１２を設ければよいの
で、実施例にかえて、平面７を等間隔に形成しない、３
個の円弧部分８の長さを等しくしない、即ち直線部分９
の長さを等しくしないなど任意である。Since the center hole may be subjected to creep deformation and three flanks 12 may be provided between the center hole and the dend center, the planes 7 are not formed at equal intervals in place of the embodiment.
The lengths of the circular arc portions 8 are not equal, that is, the straight line portions 9
The lengths are not equal and are arbitrary.
【０００９】[0009]
【発明の効果】この発明の工具によりセンタ穴を加工す
ると、センタ穴にクリ−プ変形による３個の逃げ面と、
３個のデッドセンタの支持面とを形成できるため、デッ
ドセンタが支持面により３点支持される結果、ワ−クピ
−スの安定化と高精度回転が得られて、ワ−クピ−スの
高精度加工が可能になる。When the center hole is machined by the tool of the present invention, three flanks due to creep deformation are formed in the center hole,
Since the support surfaces for the three dead centers can be formed, the dead centers are supported by the support surfaces at three points. As a result, the work pieces are stabilized and highly accurate rotation is achieved, and the work pieces are High precision machining is possible.
【図１】側面図である。FIG. 1 is a side view.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】ワ−クピ−スのセンタ穴が、ポリゴン形状に創
成された状態を示す断面図である。FIG. 3 is a cross-sectional view showing a state in which a center hole of a work piece is created in a polygonal shape.
【図４】図３のＢ−Ｂ線端面図である。4 is an end view taken along line BB of FIG.
１ 工具 ３ 刃先 ４ 基部 ５ 先端 ６ 側面 ７ 平面 １１ センタ穴 １２ 逃げ面 １３ 支持面 1 Tool 3 Cutting Edge 4 Base 5 Tip 6 Side 7 Plane 11 Center Hole 12 Relief Surface 13 Supporting Surface
Claims (2)
として円錐形状に形成されており、刃先３の基部４から
先端５へ向かって、３個の扇形状の平面７が側面６の内
側へ形成されているセンタ穴をポリゴン形状に創成する
工具。1. A cutting edge 3 provided at the tip of a handle 2 is formed in a conical shape as a whole, and three fan-shaped planes 7 are provided as side surfaces 6 from a base 4 of the cutting edge 3 toward a tip 5. A tool that creates a polygonal center hole that is formed inside.
項１のセンタ穴をポリゴン形状に創成する工具。2. A tool for forming the center holes of claim 1 in a polygonal shape, wherein the planes 7 are formed at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25105493A JPH0780783A (en) | 1993-09-13 | 1993-09-13 | Tool for making center hole in polygonal form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25105493A JPH0780783A (en) | 1993-09-13 | 1993-09-13 | Tool for making center hole in polygonal form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0780783A true JPH0780783A (en) | 1995-03-28 |
Family
ID=17216938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25105493A Pending JPH0780783A (en) | 1993-09-13 | 1993-09-13 | Tool for making center hole in polygonal form |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0780783A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009125817A (en) * | 2007-11-19 | 2009-06-11 | Vector Co Ltd | Marking stylus |
| US11697274B2 (en) | 2018-03-30 | 2023-07-11 | Toray Industries, Inc. | Molded article and production method therefor |
-
1993
- 1993-09-13 JP JP25105493A patent/JPH0780783A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009125817A (en) * | 2007-11-19 | 2009-06-11 | Vector Co Ltd | Marking stylus |
| US11697274B2 (en) | 2018-03-30 | 2023-07-11 | Toray Industries, Inc. | Molded article and production method therefor |
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