JPH05208331A - Grinding device for cutting tool - Google Patents

Grinding device for cutting tool

Info

Publication number
JPH05208331A
JPH05208331A JP5448592A JP5448592A JPH05208331A JP H05208331 A JPH05208331 A JP H05208331A JP 5448592 A JP5448592 A JP 5448592A JP 5448592 A JP5448592 A JP 5448592A JP H05208331 A JPH05208331 A JP H05208331A
Authority
JP
Japan
Prior art keywords
cutting tool
electrode
discharge
drill
coating
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
Application number
JP5448592A
Other languages
Japanese (ja)
Inventor
Kiyoshi Inoue
潔 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INR Kenkyusho KK
Original Assignee
INR Kenkyusho KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INR Kenkyusho KK filed Critical INR Kenkyusho KK
Priority to JP5448592A priority Critical patent/JPH05208331A/en
Publication of JPH05208331A publication Critical patent/JPH05208331A/en
Pending legal-status Critical Current

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  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

PURPOSE:To perform grinding and electric discharge coat hardening, of the cutting edge face of a cutting tool easily and precisely in the condition of fixing the cutting tool on a table. CONSTITUTION:A table 1 to fix a cutting tool 4, a rotational grinding wheel 5 having the grinding face 5a in parallel with the cutting edge face 4a of the cutting tool, and a rotary coating hardening electrode 6 are provided, and grinding and electric discharge coating hardening of the cutting edge face are processed in the condition of fixing the cutting tool on the table by work feeding.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は切削工具の研削装置に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool grinding apparatus.

【0002】[0002]

【従来の技術】切削工具、例えばドリルの刃先研磨は、
刃面が中心軸から45°の角度傾斜で成形研磨される。
従来、この刃先研磨に通常のグラインダを用いるとき特
別な治具を用意することが必要であった。又、前記刃先
に耐摩耗性を与えるために超硬材を放電被覆処理するこ
とが行われているが、この放電被覆はWC等の超硬チッ
プをドリルの刃面に接触開離振動させながら超硬チップ
を電極としてドリルとの間にパルス放電を繰返し、この
パルス放電熱により超硬チップの先端放電点を微小量ず
つ溶解し、熱量の大きいドリル側に転位溶着させる被覆
処理をするようにしている。しかしながら、この従来法
によると、刃面の傾斜角度、被覆面の精度等が良好でな
く、切削性能が低下し、精度の良いドリル加工ができな
くなるといった欠点を伴った。
2. Description of the Related Art The cutting edge of a cutting tool such as a drill is
The blade surface is shaped and polished at an angle of 45 ° from the central axis.
Conventionally, it has been necessary to prepare a special jig when using a normal grinder for polishing the cutting edge. Further, in order to impart wear resistance to the cutting edge, a cemented carbide material is subjected to discharge coating treatment. This discharge coating is performed by vibrating a cemented carbide tip such as WC against the blade surface of the drill while separating and vibrating it. A pulse treatment is repeated between the carbide tip and the drill, and the pulse discharge heat melts the tip discharge point of the carbide tip minute by minute, and a coating treatment is performed to dislocation weld to the drill side with a large amount of heat. ing. However, according to this conventional method, the inclination angle of the blade surface, the accuracy of the covering surface, and the like are not good, and the cutting performance deteriorates, making it impossible to perform accurate drilling.

【0003】[0003]

【発明が解決しようとする課題】本発明は前記の点に鑑
み、刃面の研磨と放電被覆硬化とが、切削工具をテーブ
ルに固定したまま容易に精密に行える研削装置の提供を
目的とする。
SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a grinding device capable of easily and precisely grinding a blade surface and hardening an electric discharge coating while a cutting tool is fixed on a table. ..

【0004】[0004]

【課題を解決するための手段】切削工具を固定して加工
送りするテーブルと、該テーブルに固定された切削工具
の刃面に平行する面に研磨面を有する回転砥石と、前記
平行する面に放電面を有する回転被覆硬化電極とを設
け、前記テーブルに固定した切削工具を加工送りしなが
ら刃面の研磨と放電被覆硬化するようにしたことを特徴
とする。
A table for fixing and cutting and feeding a cutting tool, a rotary grindstone having a polishing surface on a surface parallel to the blade surface of the cutting tool fixed on the table, and a table for the parallel surface A rotary coating hardening electrode having an electric discharge surface is provided, and the blade surface is polished and the electric discharge coating is hardened while the cutting tool fixed to the table is processed and fed.

【0005】[0005]

【作用】本発明は前記のように、テーブルに固定された
切削工具の刃面に平行する面に研磨面がある回転砥石
と、前記平行する面に放電面を有する回転被覆硬化電極
とを設け、前記テーブルに固定された切削工具を加工送
りしながら刃面の研磨と放電被覆硬化をするようにした
ので、刃面の研磨と放電被覆硬化とが所要角度をもっ
て、極めて精密高精度に処理でき、しかも切削工具をテ
ーブルに固定したまま両加工処理ができ、容易に加工す
ることができる。
According to the present invention, as described above, the rotary grindstone having the polishing surface on the surface parallel to the blade surface of the cutting tool fixed to the table, and the rotary coating hardening electrode having the discharge surface on the parallel surface are provided. Since the cutting tool fixed to the table is processed and fed, the blade surface is polished and the discharge coating is hardened, so that the polishing and the discharge coating of the blade surface can be processed at a required angle with extremely high precision and accuracy. Moreover, both machining processes can be performed while the cutting tool is fixed to the table, which facilitates machining.

【0006】[0006]

【実施例】以下、図面の一実施例により本発明を説明す
る。図1に於て、1はX,Y十字送りするクロステーブ
ルで、2がX軸送りハンドル、3がY軸送りハンドルで
ある。4はテーブル1にX軸方向に固定されたドリル
で、この先端刃先4aの研磨と放電被覆硬化の処理を行
うものである。5は回転砥石、6は回転被覆電極で、回
転モータ7によって回転駆動されるよう同軸に設けられ
る。回転砥石5は、その研磨面5aがドリルの刃面4a
に平行するよう回転軸に対して所要角度傾斜して設けら
れ、又、回転被覆電極6もその放電面6aがドリルの刃
面4aに平行するよう回転軸に対して所要角度傾斜して
設けられている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. In FIG. 1, 1 is a cross table for X and Y cross feed, 2 is an X-axis feed handle, and 3 is a Y-axis feed handle. Reference numeral 4 denotes a drill fixed to the table 1 in the X-axis direction, which is used to polish the tip blade edge 4a and to cure the electric discharge coating. Reference numeral 5 is a rotary grindstone, and 6 is a rotary coating electrode, which is coaxially provided so as to be rotationally driven by a rotary motor 7. The grinding surface 5a of the rotary grindstone 5 is the blade surface 4a of the drill.
Is provided so as to be inclined at a required angle with respect to the rotation axis so that the discharge surface 6a of the rotation covered electrode 6 is also provided at a required angle with respect to the rotation axis so as to be parallel to the blade surface 4a of the drill. ing.

【0007】図2は回転砥石5及び回転被覆電極6の正
面図で、回転砥石の研磨面5aは中心からラッパ状に設
けられ、回転被覆電極6は砥石5の外周に同心円のラッ
パ状に放電面6aが形成されている。砥石研磨面5a
は、Dia、CBN、Al,BC、その他の砥
粒をボンド材で結合した通常の砥石が利用され、又、回
転被覆電極の放電面6aは、WC、TiB、BC等
の超硬チップと8と、Ni、Mn、C等の金属粉末9と
結合材樹脂を混合して用いる。
FIG. 2 is a front view of the rotary grindstone 5 and the rotary coating electrode 6. The polishing surface 5a of the rotary grindstone is provided in a trumpet shape from the center, and the rotary coating electrode 6 is discharged on the outer periphery of the grindstone 5 in a concentric circular trumpet shape. The surface 6a is formed. Grinding wheel polishing surface 5a
Is an ordinary grinding stone in which Dia, CBN, Al 2 O 3 , B 4 C, and other abrasive grains are bonded by a bonding material, and the discharge surface 6 a of the rotary coating electrode is WC, TiB 2 , B 4 A cemented carbide chip such as C and 8, a metal powder 9 such as Ni, Mn, and C and a binder resin are mixed and used.

【0008】以上に於て、クロステーブル1を送って、
固定されたドリル4の刃先を砥石5に近接させる。送り
ハンドル2によってテーブル1をX軸に送ると、ドリル
4は砥石の研磨面5aに近づくが、所定位置まで送って
今度は他のハンドル3によってY軸に送ると、ドリル4
の刃面4aが砥石の研磨面5aに接触する。このとき砥
石の研磨面5aはドリルの刃面4aに平行するように設
けてあるから、ドリルの刃面4aは砥石の研磨面5aに
密接して、所要の角度で精密研磨することができる。
In the above, send the cross table 1,
The edge of the fixed drill 4 is brought close to the grindstone 5. When the table 1 is fed to the X-axis by the feed handle 2, the drill 4 approaches the polishing surface 5a of the grindstone, but when it is fed to a predetermined position and then fed to the Y-axis by another handle 3, the drill 4
The blade surface 4a of 1 comes into contact with the polishing surface 5a of the grindstone. At this time, since the polishing surface 5a of the grindstone is provided so as to be parallel to the blade surface 4a of the drill, the blade surface 4a of the drill is brought into close contact with the polishing surface 5a of the grindstone and precision polishing can be performed at a required angle.

【0009】次に、所定研磨が終了したら、ハンドル2
によってテーブル1をx軸にバックさせ、ドリル4の先
端が電極6の放電面6aに位置したところで止め、他の
ハンドル3によってY軸送りをすると、ドリル4の刃面
4aが電極放電面6aに接触する。電極6はモータ7に
よって回転しており、放電面6aにドリルの刃面4aが
軽接触状態を保つと、ドリル4と電極6とは接触開離の
振動をするようになり、図示しないパルス電源より通電
を行うことによって、パルス放電を繰返し発生する。通
電極性は電極6を正極もしくは負極としてもよく、或い
は交流であってもよいが、放電によって電極6の放電点
が溶解し、その溶解物がドリル4側に転移溶着し、この
微細溶着が電極6とドリル4の接触振動とパルス放電の
繰返しによって順次微小量ずつドリルの刃面に溶着し、
全体に均一被膜形成される。このドリル刃面4aに形成
される溶着被膜は、放電電極6材のWC等の超硬材で硬
度が高く、耐摩耗性に表面処理される。
Next, when the predetermined polishing is completed, the handle 2
The table 1 is moved back to the x-axis by means of the drill, and stopped when the tip of the drill 4 is positioned on the discharge surface 6a of the electrode 6, and when the Y-axis is fed by the other handle 3, the blade surface 4a of the drill 4 becomes the electrode discharge surface 6a. Contact. The electrode 6 is rotated by a motor 7, and when the blade surface 4a of the drill maintains a light contact state with the discharge surface 6a, the drill 4 and the electrode 6 vibrate in contact and separation, and a pulse power source (not shown). By further energizing, pulse discharge is repeatedly generated. The polarity of energization may be such that the electrode 6 is a positive electrode or a negative electrode, or may be an alternating current, but the discharge point of the electrode 6 is melted by discharge, and the melted material is transferred and welded to the drill 4 side, and this fine welding By the contact vibration of the electrode 6 and the drill 4 and the repetition of the pulse discharge, a minute amount is sequentially welded to the drill blade surface,
A uniform film is formed on the entire surface. The weld coating formed on the drill blade surface 4a is made of a superhard material such as WC for the discharge electrode 6 and has a high hardness and is surface-treated for wear resistance.

【0010】以上のようにして、ドリル4の刃面4aに
対し回転砥石5による研磨と回転電極6による放電被覆
硬化処理が続けて行われるが、砥石研磨面5aと電極放
電面6aとがドリル4の刃面に平行して設けられている
ので、クロステーブル1のX,Y十字送り制御によって
容易に位置出し制御して加工することができ、ドリルの
刃面4aに砥石研磨面5a及び電極放電面6aを常に所
定の正確な角度で接触させて高精度の加工処理をするこ
とができる。
As described above, the blade surface 4a of the drill 4 is continuously polished by the rotary grindstone 5 and the discharge coating hardening treatment by the rotary electrode 6, but the grindstone polishing surface 5a and the electrode discharge surface 6a are drilled. Since it is provided in parallel to the blade surface of No. 4, it can be easily positioned and controlled by the X and Y cross feed control of the cross table 1, and the blade surface 4a of the drill has the grindstone polishing surface 5a and the electrode. Highly accurate processing can be performed by always contacting the discharge surface 6a at a predetermined accurate angle.

【0011】又、ドリル4の中心軸を境とした他方の刃
面4aの加工は、テーブル1のY軸送り方向を前と反対
方向に送ることによって、同様に精密研磨と被覆硬化処
理を行うことができる。勿論、テーブル1に固定したド
リル4を回転可能に設けておけば、ドリル4の180°
回転によって他の刃面も同様のテーブル送りによって加
工処理することができる。
Further, the processing of the other blade surface 4a with the center axis of the drill 4 as a boundary is performed by feeding the table 1 in the Y-axis feed direction in the opposite direction to the front direction, and thereby similarly performing precision polishing and coating hardening treatment. be able to. Of course, if the drill 4 fixed to the table 1 is rotatably provided, 180 ° of the drill 4
Other blade surfaces can be processed by the same table feed by rotation.

【0012】図3は被覆硬化電極6に構造の異なる電極
を用いた他の実施例で、超硬チップに混合して通電性を
高める金属にファイバーもしくはワイヤ11を用い、こ
れを放電面に沿って巻回混合したものである。結合には
同様に合成樹脂を用い、一体に結合固定した放電面6b
を形成する。結合材樹脂は一般に熱硬化性樹脂を用い、
PAN等のグラファイト化した導電性のものを用いるこ
とも有効である。超硬チップは例えば、径が0.5〜1
mmφ、長さ3mm程度のWC、TiB、BC,M
n合金等を単独、又は混合したものを用い、例えばアミ
ド樹脂に45Vol%で混合して基材に結合する。
FIG. 3 shows another embodiment in which an electrode having a different structure is used as the coating-hardening electrode 6, and a fiber or wire 11 is used as a metal mixed with a cemented carbide tip to enhance the electrical conductivity, which is provided along the discharge surface. It is a mixture that is wound and mixed. Similarly, a synthetic resin is used for coupling, and the discharge surface 6b is integrally coupled and fixed.
To form. Thermosetting resin is generally used as the binder resin,
It is also effective to use a graphitized conductive material such as PAN. The carbide tip has a diameter of 0.5 to 1, for example.
mmφ, length about 3 mm WC, TiB 2 , B 4 C, M
An n-alloy or the like is used alone or as a mixture, and for example, it is mixed with an amide resin at 45 Vol% and bonded to a substrate.

【0013】又、勿論、図4の断面図のようにセラミッ
クス、樹脂、金属等の基材12に超硬チップ13を植込
み、溶接、ろう付により固定したもの、図5のようにチ
ップ13間を金属板14で機械的に締付固定したもの等
が利用できる
Of course, as shown in the sectional view of FIG. 4, a cemented carbide chip 13 is implanted in a base material 12 of ceramics, resin, metal or the like, and fixed by welding or brazing. As shown in FIG. A metal plate that is mechanically clamped and fixed can be used.

【0014】図6は回転円板状砥石51と回転円板状被
覆電極61を設けた実施例で、モータ7により回転する
砥石円板51を中心に電極円板61を周囲に設け、モー
タ7により同軸回転せしめる。各円板51,61の加工
面は、テーブルに固定されて送られる切削工具41の先
端刃面に平行するよう回転軸を傾斜して設けられ、テー
ブルの十字送りにより刃面の研磨と放電被覆硬化処理と
が各々の砥石51及び電極61により加工される
FIG. 6 shows an embodiment in which a rotating disk-shaped grindstone 51 and a rotating disk-shaped covered electrode 61 are provided. An electrode disk 61 is provided around the grinding wheel disk 51 rotated by a motor 7, and the motor 7 To rotate coaxially. The working surface of each of the disks 51, 61 is provided with its rotation axis inclined so as to be parallel to the tip blade surface of the cutting tool 41 that is fixed to the table and is fed, and the table surface is cross-fed to polish and discharge the blade surface. The hardening process is processed by each grindstone 51 and electrode 61.

【0015】尚、砥石円板51の回転と電極円板61の
回転は、同軸にして同一モータで回転することなく、並
設した各々砥石及び電極を別々のモータ回転させること
でもよく、これにより回転速度制御等を独立制御するこ
とができる。又、砥石の研磨面と電極の放電面は、同一
平面上でなくても切削工具の刃面に平行する面に設けれ
ばよい。又、切削工具を加工送りするテーブルの制御
は、モータ制御により自動制御することができ、又、テ
ーブルはX,Y軸以外にZ軸或いは回転送りすることも
できる。
The rotation of the grindstone disk 51 and the rotation of the electrode disk 61 may be achieved by rotating the grindstones and electrodes arranged side by side by separate motors without rotating them coaxially by the same motor. Rotational speed control etc. can be controlled independently. Further, the polishing surface of the grindstone and the discharge surface of the electrode may be provided on a surface parallel to the blade surface of the cutting tool even if they are not on the same plane. Further, the control of the table for feeding the cutting tool can be automatically controlled by the motor control, and the table can be fed by the Z axis or the rotation in addition to the X and Y axes.

【0016】[0016]

【発明の効果】以上のように本発明は、テーブルに固定
された切削工具の刃面に平行する面に研磨面を有する回
転砥石と、前記平行する面に放電面を有する回転被覆硬
化電極とを設け、前記テーブルに固定した切削工具を加
工送りしながら刃面の研磨と放電被覆硬化処理を行なう
ようにしたので、刃面の研磨と放電被覆硬化処理とが所
要角度をもって極めて精密高精度にでき、切削工具性の
良好な、且つ、耐摩耗性の長寿命の切削工具が得られ
る。又、前記研磨と放電被覆硬化処理とが切削工具をテ
ーブルに固定したまま同時に加工でき、刃面の加工処理
が極めて容易に行える効果がある。
As described above, according to the present invention, a rotary grindstone having a polishing surface on a surface parallel to the blade surface of a cutting tool fixed to a table, and a rotary coating hardened electrode having a discharge surface on the parallel surface. Since the cutting tool fixed to the table is processed and fed, the blade surface is ground and the discharge coating hardening treatment is carried out. It is possible to obtain a cutting tool which has a good cutting tool property and is wear-resistant and has a long life. Further, the polishing and the electric discharge coating hardening treatment can be performed at the same time while the cutting tool is fixed on the table, so that the machining treatment of the blade surface can be performed very easily.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例構成図である。FIG. 1 is a configuration diagram of an embodiment of the present invention.

【図2】図1の一部正面図である。FIG. 2 is a partial front view of FIG.

【図3】本発明の他の実施例の一部正面図である。FIG. 3 is a partial front view of another embodiment of the present invention.

【図4】本発明の他の実施例図である。FIG. 4 is a diagram showing another embodiment of the present invention.

【図5】本発明の他の実施例図である。FIG. 5 is a diagram of another embodiment of the present invention.

【図6】本発明の他の実施例図である。FIG. 6 is a diagram showing another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 テーブル 2,3 送りハンドル 4 ドリル 4a 刃先 5 砥石 5a 研磨面 6 電極 6a 放電面 7 モータ 8 超硬チップ 9 金属 1 Table 2, 3 Feeding Handle 4 Drill 4a Blade Edge 5 Grinding Stone 5a Polishing Surface 6 Electrode 6a Discharge Surface 7 Motor 8 Carbide Tip 9 Metal

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 切削工具を固定して加工送りするテーブ
ルと、該テーブルに固定された切削工具の刃面に平行す
る面に研磨面を有する回転砥石と、前記平行する面に放
電面を有する回転被覆硬化電極とを設け、前記テーブル
に固定した切削工具を加工送りしながら刃面の研磨と放
電被覆硬化するようにしたことを特徴とする切削工具の
研削装置。
1. A table for fixing and cutting and feeding a cutting tool, a rotary grindstone having a polishing surface on a surface parallel to the blade surface of the cutting tool fixed on the table, and a discharge surface on the parallel surface. A grinding tool for a cutting tool, wherein a rotary coating hardening electrode is provided, and a cutting tool fixed to the table is processed and fed so that the blade surface is polished and the discharge coating is hardened.
JP5448592A 1992-01-29 1992-01-29 Grinding device for cutting tool Pending JPH05208331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5448592A JPH05208331A (en) 1992-01-29 1992-01-29 Grinding device for cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5448592A JPH05208331A (en) 1992-01-29 1992-01-29 Grinding device for cutting tool

Publications (1)

Publication Number Publication Date
JPH05208331A true JPH05208331A (en) 1993-08-20

Family

ID=12971954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5448592A Pending JPH05208331A (en) 1992-01-29 1992-01-29 Grinding device for cutting tool

Country Status (1)

Country Link
JP (1) JPH05208331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5816892A (en) * 1997-02-06 1998-10-06 Cobra Machine Tool Co., Inc. Positioning control for combined milling machine and internally positioned grinding wheel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5816892A (en) * 1997-02-06 1998-10-06 Cobra Machine Tool Co., Inc. Positioning control for combined milling machine and internally positioned grinding wheel

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