JP3350980B2 - Whetstone correction method - Google Patents
Whetstone correction methodInfo
- Publication number
- JP3350980B2 JP3350980B2 JP32053192A JP32053192A JP3350980B2 JP 3350980 B2 JP3350980 B2 JP 3350980B2 JP 32053192 A JP32053192 A JP 32053192A JP 32053192 A JP32053192 A JP 32053192A JP 3350980 B2 JP3350980 B2 JP 3350980B2
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- workpiece
- spindle
- dressing
- feed
- 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 - Fee Related
Links
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、砥石の第１研削面と第
２研削面で工作物の円筒面と端面を研削し、放電ドレッ
シング装置により砥石の第１研削面と第２研削面を放電
ドレッシングするようにした砥石修正方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to grinding a cylindrical surface and an end surface of a workpiece with a first grinding surface and a second grinding surface of a grindstone, and using a discharge dressing apparatus, the first grinding surface and the second grinding surface of the grindstone. on the abrasive stone correction method was to discharge dressing.
【０００２】[0002]
【従来技術】特開昭６２−７９９６０号公報には、工作
物軸線と直交する送り軸を有した砥石台をベッドに対し
て回転自在に設け、この回転角度により砥石の研削角度
（工作物軸線に対する砥石の傾斜角）を設定するととも
に、この研削角度の方向に、砥石台送り軸と工作物軸線
に平行な工作物テーブル送り軸との２軸同時駆動による
工作物軸線に対する砥石の斜め送り方向を一致させた研
削盤が開示されている。2. Description of the Related Art Japanese Patent Application Laid-Open No. 62-79960 discloses that a grindstone table having a feed axis orthogonal to a workpiece axis is provided rotatably with respect to a bed, and the rotation angle of the grindstone grind angle (workpiece axis line). The inclination angle of the grinding wheel with respect to the workpiece axis by the simultaneous driving of the grinding wheel base feed axis and the workpiece table feed axis parallel to the workpiece axis in the direction of this grinding angle. Are disclosed.
【０００３】この斜め送り方向は、研削時に砥石カバー
が主軸ユニットを構成する心押し台と干渉しないよう
に、砥石台の送り軸とのなす角度θ側が小さくなる例え
ば６０°に設定される。[0003] The skewing direction, grinding stone cover when grinding so as not to interfere with the tailstock constituting the spindle unit, the angle θ opposing a wheel head feed shaft is set to be smaller for example 60 °.
【０００４】[0004]
【発明が解決しようとする課題】上記研削盤において、
砥石を放電ドレッシングにより修正するため、修正工具
は、工作物の被削面に倣った電極面を有する放電電極
を、例えば主軸台の砥石側の側面に取付けられている。
放電ドレッシングによる砥石の修正は、放電電極を研削
すると同時に研削によって生じた切クズと砥石間に放電
を発生させ、この放電により砥石表面のボンドを蒸発さ
せて、砥粒を再び突出させるものである。In the above grinding machine,
In order to repair the grindstone by discharge dressing, the repair tool has a discharge electrode having an electrode surface following the work surface of the workpiece, for example, attached to a grindstone side surface of the headstock.
The modification of the grindstone by the discharge dressing is to generate a discharge between the cutting waste and the grindstone caused by the grinding at the same time as the grinding of the discharge electrode, and to evaporate the bond on the grindstone surface by this discharge so that the abrasive grains are protruded again. .
【０００５】具体的に、図６は放電ドレッシング時の砥
石の従来の送りを示しており、１は円盤状のメタルボン
ドＣＢＮ砥石、２は銅製の放電電極である。放電電極２
は、工作物の円筒面に倣った外周電極面２ａと、工作物
の端面に倣った肩部電極面２ｂとを有している。砥石１
には、周縁部に、工作物の円筒面を研削する第１研削面
１ａと、工作物の端面を研削する第２研削面１ｂとから
なる山形の研削面が形成されている。More specifically, FIG. 6 shows a conventional feed of a grindstone at the time of discharge dressing, wherein 1 is a disk-shaped metal bond CBN grindstone, and 2 is a copper discharge electrode. Discharge electrode 2
Has an outer peripheral electrode surface 2a following the cylindrical surface of the workpiece and a shoulder electrode surface 2b following the end surface of the workpiece. Whetstone 1
In the peripheral portion, a mountain-shaped ground surface formed of a first ground surface 1a for grinding a cylindrical surface of a workpiece and a second ground surface 1b for grinding an end surface of the workpiece is formed.
【０００６】そして、砥石台の送り軸と工作物テーブル
送り軸とを同時駆動することにより、砥石１は、第１研
削面１ａと第２研削面１ｂとが交差した砥石１の研削頂
部１ｃが通る斜め平面内の行路Ａに沿って移動し、その
行路Ａの終点で放電電極２における外周電極面２ａと肩
部電極面２ｂとの交差部が移動して、砥石１の第１研削
面１ａが上記放電電極２の外周電極面２ａでドレッシン
グされ、第２研削面１ｂが肩部電極面２ｂでドレッシン
グされることになる。By simultaneously driving the feed shaft of the grindstone table and the feed shaft of the workpiece table, the grindstone 1 has a ground top 1c of the grindstone 1 where the first ground surface 1a and the second ground surface 1b intersect. And the intersection of the outer electrode surface 2a and the shoulder electrode surface 2b of the discharge electrode 2 moves at the end point of the path A, and the first grinding surface 1a of the grindstone 1 moves. Is dressed on the outer peripheral electrode surface 2a of the discharge electrode 2, and the second ground surface 1b is dressed on the shoulder electrode surface 2b.
【０００７】しかしながら、上記修正方法によると、砥
石１の上記行路Ａと工作物軸線Ｏｓとのなす角度が、研
削時の研削角度と同じ値に設定されており、砥石台の送
り軸に平行な軸線Ｘと行路Ａとのなす角度をθとし、砥
石１の第１研削面１ａが研削される研削量をｈとする
と、第２研削面１ｂが研削される研削量はｈ・ｔａｎθ
となり、第２研削面１ｂの砥粒突出量は第１研削面１ａ
の砥粒突出量の１／ｔａｎθとなる。砥粒の突出量は一
般に放電電極２が砥石１を研削する研削量に比例するこ
とから、常に第２研削面１ｂの突出量が不足した状態に
ドレシッングされる。このため、第２研削面１ｂの焼け
を回避するのに、頻繁なドレッシングが必要になり、砥
石寿命を短くしている。However, according to the above-mentioned correction method, the angle between the path A of the grinding wheel 1 and the workpiece axis Os is set to the same value as the grinding angle at the time of grinding, and is parallel to the feed axis of the grinding wheel head. Assuming that the angle between the axis X and the path A is θ, and the amount of grinding of the first grinding surface 1a of the grinding wheel 1 is h, the amount of grinding of the second grinding surface 1b is h · tan θ.
And the protrusion amount of the abrasive grains on the second ground surface 1b is equal to the first ground surface 1a.
Is 1 / tan θ of the projection amount of the abrasive grains. Since the amount of protrusion of the abrasive grains is generally proportional to the amount of grinding of the grinding wheel 1 by the discharge electrode 2, the second grinding surface 1b is always dressed in a state where the amount of protrusion is insufficient. Therefore, to avoid scorching of the second grinding surface 1 b, frequent dressing is required, and shortening the grinding wheel life.
【０００８】[0008]
【課題を解決するための手段】本発明は、基台となるベ
ッドと、このベッドに支承され互いに相対移動可能な主
軸台および砥石台と、この主軸台に支承され、工作物を
主軸中心線回りに回転駆動する主軸と、この砥石台に支
承され、この主軸中心線に対して所定の角度だけ傾けら
れた状態で回転駆動される砥石軸と、この砥石軸に固定
されて回転駆動され、この主軸中心線に沿ってこの工作
物と摺接すべき円錐面状の第１研削面と、この第１研削
面に直交しこの主軸中心線に対して垂直にこの工作物と
摺接すべき円錐面状の第２研削面とを、外周面にもつ円
盤状の砥石と、この主軸中心線に沿った軸長方向と、こ
の主軸中心線に直交する半径方向とを合成した送り方向
に、この主軸台およびこの工作物に対してこの砥石を相
対移動させる送り機構と、この主軸台のこの砥石台側に
固定され、この主軸中心線を法線とする平面に沿った肩
部電極面と、この主軸中心線に沿った外周電極面との、
互いに直交する一対の電極面をもった放電電極板を備え
た放電ドレッシング装置と、を有する研削盤の使用方法
であって、前記砥石を、前記工作物に対して前記軸長方
向と前記半径方向とを合成した前記送り方向に所定の研
削送り角度で送り、前記第１研削面でこの工作物の外形
の一部を円筒面状の外周面に研削すると同時に、前記第
２研削面でこの工作物の外形の他の一部をこの円筒面の
一端から遠心方向に立ち上がったリング状の端面に研削
する研削過程とは別に、この砥石を、前記放電電極板に
対して前記軸長方向と前記半径方向とを合成した送り方
向に所定のドレッシング送り角度で送り、前記放電電極
板の前記外周電極面でこの砥石のこの第１研削面にドレ
ッシングを施すと同時に、前記肩部電極面でこの第２研
削面にドレッシングを施すドレッシング過程を有する砥
石修正方法において、 前記ドレッシング送り角度は、前
記研削送り角度とは異なり、放電ドレッシング量が前記
第１研削面と前記第２研削面とで略同等となる所定の角
度に設定されていることを特徴とする砥石修正方法であ
る。ここで特に、前記ドレッシング送り角度は、前記放
電電極板の前記外周電極面および前記肩部電極面の両電
極面に対してそれぞれ４５°であることが、なお望まし
い。 SUMMARY OF THE INVENTION The present invention provides a base
And a main body supported on this bed and movable relative to each other.
The headstock and grinding wheel head are supported by this headstock,
A spindle that rotates around the spindle center line and a support
Tilted at a predetermined angle with respect to this spindle centerline.
Grinding wheel shaft that is driven to rotate in the locked state and fixed to this grinding wheel shaft
Is rotated and driven along this spindle centerline.
A first grinding surface having a conical surface to be brought into sliding contact with an object, and the first grinding surface
Perpendicular to the plane and perpendicular to this spindle centerline
A circle having an outer peripheral surface with a conical second grinding surface to be brought into sliding contact
The disk-shaped grindstone and the axial direction along this spindle centerline
Feed direction combined with the radial direction perpendicular to the spindle center line
In addition, this grindstone is applied to the headstock and the workpiece.
The feed mechanism to move and the headstock side of this headstock
Shoulder along a plane fixed and normal to this spindle centerline
Part electrode surface and the outer peripheral electrode surface along the main axis center line,
Equipped with a discharge electrode plate having a pair of electrode surfaces orthogonal to each other
Using a grinding machine having a discharge dressing device
Wherein the grindstone is moved in the axial direction with respect to the workpiece.
Direction in the feed direction obtained by combining the
Feeding at a cutting feed angle, the outer shape of the workpiece at the first grinding surface
At the same time as grinding a part of the cylindrical outer peripheral surface.
2 The other part of the external shape of the workpiece is
Grinding from one end to a ring-shaped end surface rising in the centrifugal direction
Separately from the grinding process, the grinding wheel is applied to the discharge electrode plate.
Feeding method combining the axial direction and the radial direction
At a predetermined dressing feed angle in the
The outer electrode surface of the plate is drained to this first ground surface of the grinding wheel.
At the same time that the second grinding is performed on the shoulder electrode surface,
Grinding with dressing process for dressing the cut surface
In the stone correction method, the dressing feed angle is
Unlike the grinding feed angle, the discharge dressing amount is
A predetermined angle that is substantially equal between the first ground surface and the second ground surface
Grinding wheel correction method characterized in that
You. Here, in particular, the dressing feed angle depends on the discharge angle.
Voltage of the outer peripheral electrode surface and the shoulder electrode surface of the electrode plate.
It is still desirable that each be 45 ° to the pole face.
No.
【０００９】[0009]
【作用】工作物を研削する時は、工作物の回転軸線方法
の移動と工作物回転軸線と直交する方向の移動を同時に
行い、工作物回転軸線に対して６０度傾斜した方向に工
作物と砥石を相対移動させる。この結果、砥石の第１研
削面の円筒が研削されるとともに砥石の第２研削面で工
作物の端面が研削される。When the workpiece is ground, the workpiece is simultaneously moved in the direction of the axis of rotation and in the direction perpendicular to the axis of rotation of the workpiece, and the workpiece is tilted by 60 degrees with respect to the axis of rotation of the workpiece. Move the grindstone relatively. As a result, the cylinder of the first grinding surface of the grinding wheel is ground, and the end surface of the workpiece is ground by the second grinding surface of the grinding wheel.
【００１０】砥石をドレッシングする時は、工作物の回
転軸線方向の移動と工作物回転軸線と直交する方向の移
動を同時に行い、工作物回転軸線に対して４５度傾斜し
た方向に放電電極板と砥石を相対移動させる。この結
果、放電ドレッシング装置の電極板で砥石の第１研削面
と第２研削面が同量ドレッシングされる。よって、第２
研削面のドレッシング不足が無くなり、工作物の端面の
研削焼けが無くなる。When dressing the grindstone, the workpiece is simultaneously moved in the direction of the rotation axis and in the direction orthogonal to the rotation axis of the workpiece, and the discharge electrode plate is inclined in a direction inclined by 45 degrees with respect to the rotation axis of the workpiece. Move the grindstone relatively. As a result, the first ground surface and the second ground surface of the grindstone are dressed by the same amount on the electrode plate of the discharge dressing device. Therefore, the second
Insufficient dressing of the grinding surface is eliminated, and grinding burn of the end face of the workpiece is eliminated.
【００１１】[0011]
【実施例】以下、本発明の砥石修正方法を図１に示す研
削盤を例にして説明する。図１に示すように、本発明が
適用される研削盤は、ベッド１０上に、主軸台１１と心
押台１２を有した工作物テーブル１３が載置されてい
る。主軸台１１と心押台１２との間には円筒状の工作物
Ｗが支持され、該工作物Ｗは図略の主軸駆動モータ１１
ａに連結された主軸１５の回転によって回転駆動される
ようになっている。そして、工作物テーブル１３はボー
ルねじ２３と図略のボールナットとから構成された送り
機構を介してサーボモータ１４に連結され、工作物軸線
Ｏｓと平行なＺ軸方向へ移動されるようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The grinding wheel repair method of the present invention will be described below with reference to a grinding machine shown in FIG. As shown in FIG. 1, in a grinding machine to which the present invention is applied, a work table 13 having a headstock 11 and a tailstock 12 is placed on a bed 10. A cylindrical workpiece W is supported between the headstock 11 and the tailstock 12, and the workpiece W is supported by a spindle drive motor 11 (not shown).
The rotation is driven by the rotation of the main shaft 15 connected to a. The workpiece table 13 is connected to a servomotor 14 via a feed mechanism including a ball screw 23 and a ball nut (not shown), and is moved in a Z-axis direction parallel to the workpiece axis Os. ing.
【００１２】一方、ベッド１０の後方には、砥石台１７
が工作物軸線Ｏｓと直交するＸ軸方向に進退可能に装架
され、この砥石台１７は、Ｚ軸と同様に、ボールねじ２
２と図略のボールナットからなる送り機構を介してサー
ボモータ１８に連結され、工作物軸線Ｏｓと直交したＸ
軸方向へ移動されるようになっている。また、砥石台１
７には、工作物Ｗの円筒面Ｗａを研削する第１研削面Ｇ
ａ及び工作物Ｗの端面Ｗｂを研削する第２研削面Ｇｂか
らなる山形の研削面を周縁部に形成したメタルボンドＣ
ＢＮ砥石Ｇが回転軸１９に支承されている。回転軸１９
は、図略のプーリを介してモータ２０に連結されてい
る。なお、砥石Ｇは砥石カバー２６によって覆われてい
る。On the other hand, behind the bed 10,
Is mounted so as to be able to advance and retreat in the X-axis direction orthogonal to the workpiece axis Os.
2 and a feed mechanism consisting of a ball nut (not shown), which is connected to the servomotor 18 via a feed mechanism, and which is orthogonal to the workpiece axis Os.
It is designed to be moved in the axial direction. In addition, whetstone stand 1
7 has a first ground surface G for grinding the cylindrical surface Wa of the workpiece W.
a and a metal bond C formed on the peripheral edge of a mountain-shaped ground surface consisting of a second ground surface Gb for grinding the end surface Wb of the workpiece W
A BN grinding wheel G is supported on the rotating shaft 19. Rotating shaft 19
Is connected to the motor 20 via a pulley (not shown). The grindstone G is covered by a grindstone cover 26.
【００１３】更に、砥石台１７に向く主軸台１１の側面
には、放電ドレッシング装置の銅製の放電電極板２５が
取付けられている。この放電電極板２５は、工作物Ｗの
円筒面Ｗａに倣った外周電極面２ａと、工作物Ｗの端面
Ｗｂに倣った肩部電極面２ｂとを有している。 上記構
成の研削盤は、マイクロコンピュータ等の中央処理装置
３１を主体に構成された制御装置３０によって制御され
るようになっている。制御装置３０は、中央処理装置３
１と、これに結合され、研削プログラム、放電ドレッシ
ングプログラム等が格納されたメモリ３２と、該メモリ
３２に上記各プログラムを入力するとともに加工ボタ
ン、ドレッシングボタン等が設けられた操作盤３３と、
サーボモータ１８及び１４を駆動するための分配パルス
を発生するパルス分配回路３４，３５とにより数値制御
装置を構成し、それぞれのパルス分配回路３４，３５か
ら駆動回路４１，４２にパルス信号を供給してサーボモ
ータ１８，１４を制御するようになっている。Further, a copper discharge electrode plate 25 of a discharge dressing device is mounted on a side surface of the headstock 11 facing the grindstone head 17. The discharge electrode plate 25 has an outer peripheral electrode surface 2a following the cylindrical surface Wa of the workpiece W, and a shoulder electrode surface 2b following the end surface Wb of the workpiece W. The grinding machine having the above configuration is controlled by a control device 30 mainly composed of a central processing unit 31 such as a microcomputer. The control device 30 includes the central processing unit 3
1, a memory 32 coupled thereto and storing a grinding program, an electric discharge dressing program, etc., and an operation panel 33 for inputting each of the programs into the memory 32 and provided with a machining button, a dressing button, etc.
The pulse distribution circuits 34 and 35 for generating distribution pulses for driving the servo motors 18 and 14 constitute a numerical controller, and pulse signals are supplied from the respective pulse distribution circuits 34 and 35 to the drive circuits 41 and 42. Thus, the servo motors 18 and 14 are controlled.
【００１４】加えて、中央処理装置３１は、修正時、放
電圧供給回路４３に放電ドレッシング用の放電電極板２
５に電圧を供給することができる。前記操作盤３３の加
工ボタンをオンすると、中央処理装置３１はメモリ３２
に記憶された研削プログラムを解読し、実行する。図２
のフローに示すように、ステップ５１で砥石台１７を前
進させるとともに工作物テーブル１３を右進させること
により、工作物テーブル１３に対して砥石台１７を相対
的に工作物回転軸線に対して６０度傾斜した方向に前進
移動させる。この時、工作物Ｗの円筒面Ｗａを第１研削
面Ｇａで研削するとともに工作物Ｗの端面Ｗｂを第２研
削面Ｇｂで研削する。続いてステップ５２で工作物テー
ブル１３を右進させ、工作物Ｗの円筒面Ｗａを第１研削
面Ｃａで研削する。加工が完了すると、ステップ５３で
砥石台１７を後退させるとともに工作物テーブル１３を
左進させることにより、工作物テーブル１３に対して砥
石台１７を相対的に工作物回転軸線に対して６０度傾斜
した方向に後退移動させる。次に、ステップ５４で工作
物テーブル１３を左進させることにより砥石台１７と工
作物テーブル１３を本の位置へ復帰させる。前記ステッ
プ５１は研削プログラムで、「Ｇ６０ Ｘ＝Ｘｓ−Ｘ
ｅ」（ここで、Ｘｓは図４において、工作物回転軸線Ｏ
ｓに対する移動前の第１研削面Ｇａの位置であり、Ｘｅ
は工作物回転軸線Ｏｓに対する移動後の第１研削面Ｇａ
の位置である。）の形で入力されているため、メモリ３
２のコードＧ６０に基づいてＺ方向の移動量が算出され
るとともにＸ方向の移動量の指令が駆動回路４１に与え
られ、Ｚ方向の移動量の指令が駆動回路４２に与えられ
る。即ち、Ｚ＝Ｘ／ｔａｎ６０°の演算式に基づいてＺ
方向の移動量Ｚ＝（Ｘｓ−Ｘｅ）ｔａｎ６０°が算出さ
れ、駆動回路４１には「Ｘ＝Ｘｓ−Ｘｅ」の指令が与え
られ、駆動回路４２には「Ｚ＝（Ｘｓ−Ｘｅ／ｔａｎ６
０°」の指令が与えられる。同様にステップ５３は研削
プログラムで、「Ｇ６０ Ｘ＝−Ｘｓ＋Ｘｅ」の形で入
力されているため、Ｚ＝Ｘ／ｔａｎ６０°の演算式に基
づいてＺ方向の移動量Ｚ＝（−Ｘｓ＋Ｘｅ）／ｔａｎ６
０°が算出され、駆動回路４１には「Ｘ＝−Ｘｓ＋Ｘ
ｅ」の指令が与えられ、駆動回路４２には「Ｚ＝（−Ｘ
ｓ＋Ｘｅ）／ｔａｎ６０°」の指令が与えられる。In addition, at the time of correction, the central processing unit 31 supplies the discharge voltage supply circuit 43 with the discharge electrode plate 2 for discharge dressing.
5 can be supplied with voltage. When the processing button of the operation panel 33 is turned on, the central processing unit 31
Decrypts and executes the grinding program stored in. FIG.
As shown in the flow of FIG. 5, by moving the grindstone table 17 forward and moving the workpiece table 13 rightward in step 51, the grindstone table 17 is moved relative to the workpiece table 13 by 60 degrees with respect to the workpiece rotation axis. Move forward in the direction inclined by degrees. At this time, the cylindrical surface Wa of the workpiece W is ground with the first grinding surface Ga, and the end surface Wb of the workpiece W is ground with the second grinding surface Gb. Subsequently, in step 52, the workpiece table 13 is moved rightward, and the cylindrical surface Wa of the workpiece W is ground with the first ground surface Ca. When the machining is completed, the grindstone table 17 is retracted and the workpiece table 13 is moved leftward in step 53, whereby the grindstone table 17 is tilted by 60 degrees relative to the workpiece rotation axis with respect to the workpiece table 13. Move backward in the direction you did. Next, at step 54, the work table 13 is moved leftward to return the grindstone table 17 and the work table 13 to the book position. The step 51 is a grinding program, "G60 X = Xs-X
e "(where Xs is the workpiece rotation axis O in FIG. 4)
s is the position of the first ground surface Ga before movement, and Xe
Is the first ground surface Ga after the movement with respect to the workpiece rotation axis Os.
Position. ), The memory 3
The movement amount in the Z direction is calculated based on the code G60 of No. 2, and the command for the movement amount in the X direction is given to the drive circuit 41, and the command for the movement amount in the Z direction is given to the drive circuit. That is, Z = X / tan 60 °
The direction movement amount Z = (Xs−Xe) tan60 ° is calculated, the command “X = Xs−Xe” is given to the drive circuit 41, and “Z = (Xs−Xe / tan6) is given to the drive circuit 42.
0 ° ”is given. Similarly, step 53 is a grinding program, which is input in the form of "G60 X = -Xs + Xe", so that the Z-direction movement amount Z = (-Xs + Xe) / tan6 based on the arithmetic expression of Z = X / tan60 °.
0 ° is calculated, and “X = −Xs + X” is supplied to the drive circuit 41.
e ”is given, and the drive circuit 42 receives“ Z = (− X
s + Xe) / tan60 ° ".
【００１５】上記研削プログラムを繰り返し行なうと、
研削面が目づまり等を起こすので、操作盤３３のドレッ
シングボタンを押して放電ドレッシングプログラムを実
行させる。まず、図３のフローに示すように、ステップ
６１で工作物テーブル１３を右進させ、続いてステップ
６２で砥石台１７を前進させるとともに工作物テーブル
１３を右進させることにより、工作物テーブル１３に対
して砥石台１７を相対的に工作物回転軸線に対して４５
度傾斜した方向に前進移動させる。ここで、放電電極板
２５の外周電極２ａを第１研削面Ｇａで研削するととも
に放電電極板２５の肩部電極面２ｂを第２研削面Ｇｂで
研削する。この時、研削に発生する切り屑と砥石Ｇの研
削面Ｗａ，Ｗｂ間に放電が発生し、メタルボンドが蒸発
して砥粒がメタルボンドに対して突き出される。続いて
ステップ６３で砥石台１７を後退させるとともに工作物
テーブル１３を左進させることにより、工作物テーブル
１３に対して砥石台１７を相対的に工作物回転軸線に対
して４５度傾斜した方向に後退移動させる。次に、ステ
ップ６４で工作物テーブル１３を左進させることにより
砥石台１７と工作物テーブル１３を元の位置へ復帰させ
る。前記ステップ６２は研削プログラムで、「Ｇ４５
Ｘ＝Ｘｓ−Ｘｎ」（ここで、Ｘｓは図５において、工作
物回転軸線Ｏｓに対する移動前の第１研削面Ｇａの位置
であり、Ｘｎは工作物回転軸線Ｏｓに対する移動後の第
１研削面Ｇａの位置である。）の形で入力されているた
め、メモリ３２のコードＧ４５に基づいてＺ方向の移動
量が算出されるとともにＸ方向の移動量の指令が駆動回
路４１に与えられ、Ｚ方向の移動量の指令が駆動回路４
２に与えられる。即ち、Ｚ＝Ｘ／ｔａｎ４５°の演算式
に基づいてＺ方向の移動量Ｚ＝（Ｘｓ−Ｘｎ）／ｔａｎ
４５°が算出され、駆動回路４１には「Ｘ＝Ｘｓ−Ｘ
ｎ」の指令が与えられ、駆動回路４２には「Ｚ＝（Ｘｓ
−Ｘｎ／ｔａｎ４５°」の指令が与えられる。同様にス
テップ６３は研削プログラムで、「Ｇ６０ Ｘ＝−Ｘｓ
＋Ｘｎ」の形で入力されているため、Ｚ＝Ｘ／ｔａｎ４
５°の演算式に基づいてＺ方向の移動量Ｚ＝（−Ｘｓ＋
Ｘｎ）／ｔａｎ４５°が算出され、駆動回路４１には
「Ｘ＝−Ｘｓ＋Ｘｎ」の指令が与えられ、駆動回路４２
には「Ｚ＝（−Ｘｓ＋Ｘｅ）／ｔａｎ４５°」の指令が
与えられる。By repeatedly performing the above grinding program,
Since the ground surface is clogged or the like, the discharge dressing program is executed by pressing the dressing button of the operation panel 33. First, as shown in the flow of FIG. 3, the work table 13 is moved rightward in step 61, and then the work table 13 is moved right in step 62 by moving the grindstone table 17 forward and the work table 13. The wheel head 17 relative to the workpiece rotation axis by 45
Move forward in the direction inclined by degrees. Here, the outer peripheral electrode 2a of the discharge electrode plate 25 is ground on the first ground surface Ga, and the shoulder electrode surface 2b of the discharge electrode plate 25 is ground on the second ground surface Gb. At this time, an electric discharge is generated between the chips generated in the grinding and the grinding surfaces Wa and Wb of the grindstone G, the metal bond is evaporated, and the abrasive grains are protruded from the metal bond. Subsequently, in step 63, the grindstone table 17 is retracted and the workpiece table 13 is moved leftward, so that the grindstone table 17 is inclined relative to the workpiece table 13 by 45 degrees with respect to the axis of rotation of the workpiece. Move backward. Next, in step 64, the work table 13 is moved leftward to return the grindstone table 17 and the work table 13 to their original positions. Step 62 is a grinding program, "G45
X = Xs-Xn "(where Xs is the position of the first ground surface Ga before the movement with respect to the workpiece rotation axis Os in FIG. 5, and Xn is the first ground surface after the movement with respect to the workpiece rotation axis Os in FIG. 5). The position is in the form of Ga.), The movement amount in the Z direction is calculated based on the code G45 in the memory 32, and the command for the movement amount in the X direction is given to the drive circuit 41. The command of the moving amount in the direction is
2 given. That is, the amount of movement in the Z direction Z = (Xs−Xn) / tan based on the arithmetic expression of Z = X / tan 45 °.
45 ° is calculated, and “X = Xs−X” is provided to the drive circuit 41.
n ”is given to the drive circuit 42 and“ Z = (Xs
−Xn / tan 45 ° ”. Similarly, step 63 is a grinding program, “G60 X = −Xs
+ Xn ", Z = X / tan4
The moving amount Z in the Z direction based on the arithmetic expression of 5 ° is Z = (− Xs +
Xn) / tan45 ° is calculated, and a command of “X = −Xs + Xn” is given to the drive circuit 41, and the drive circuit 42
Is given a command of “Z = (− Xs + Xe) / tan45 °”.
【００１６】このように、ドレッシング時の放電電極板
２５に対する砥石Ｇの送り方向を工作物回転軸線に対し
て４５度傾斜した方向に送ることにより、第１研削面Ｇ
ａと第２研削面Ｇｂのドレッシング量が同じになり、メ
タルボンドに対する砥粒の突出し量が同じになる。よっ
て、第１研削面Ｇａと第２研削面Ｇｂの切れ味が同じに
なり、工作物Ｗの端面Ｗｂの焼けが無くなる。 As described above, the feed direction of the grindstone G with respect to the discharge electrode plate 25 at the time of dressing is sent in a direction inclined by 45 degrees with respect to the rotation axis of the workpiece, so that the first ground surface G
a and the second grinding surface Gb have the same dressing amount, and the protrusion amount of the abrasive grains with respect to the metal bond is the same. Therefore, the sharpness of the first ground surface Ga and the second ground surface Gb becomes the same, and the end surface Wb of the workpiece W does not burn .
【００１７】以上述べたように本発明によれば、砥石を
ドレッシングする時は、工作物回転軸線に対して研削時
とは異なる４５度傾斜した方向に放電電極板と砥石を相
対移動させるようにしたので、放電電極板で砥石の第１
研削面と第２研削面が同量ドレッシングされる。よっ
て、第２研削面のドレッシング不足が無くなり、工作物
の端面の研削焼けが無くなる効果が得られる。According to the present invention as mentioned above, when dressing the grinding wheel during grinding relative to the workpiece axis of rotation
Since the discharge electrode plate and the grindstone are relatively moved in a direction inclined by 45 degrees different from the first direction, the first of the grindstone is moved by the discharge electrode plate.
The ground surface and the second ground surface are dressed by the same amount. Therefore, the effect of eliminating the lack of dressing on the second grinding surface and the grinding burn on the end surface of the workpiece can be obtained.
【図１】本発明を適用した研削盤を示す構成図。FIG. 1 is a configuration diagram showing a grinding machine to which the present invention is applied.
【図２】本発明の研削プロクラムのフローチャート。FIG. 2 is a flowchart of a grinding program according to the present invention.
【図３】本発明の放電ドレッシングプログラムのフロー
チャート。FIG. 3 is a flowchart of a discharge dressing program of the present invention.
【図４】研削時の砥石の送りを説明するための説明図。FIG. 4 is an explanatory diagram for explaining the feed of a grindstone during grinding.
【図５】放電ドレシッング時の砥石の送りを説明するた
めの説明図。FIG. 5 is an explanatory diagram for explaining the feed of a grindstone during discharge dressing.
【図６】従来の放電ドレッシング時の送りを表した説明
図。FIG. 6 is an explanatory diagram showing a conventional feed during discharge dressing.
１０…ベッド、１１…主軸台、１３…工作物テーブル、
１４，１８…サーボモータ、１５…主軸、１７…砥石
台、１９…回転軸、２２…Ｘ軸ボールねじ、２３…Ｚ軸
ボールねじ、２５…放電電極、Ｇ…砥石、Ａ，Ｂ…斜め
送り行路Ｏｓ…工作物軸線。10 bed, 11 headstock, 13 work table,
14, 18: Servo motor, 15: Spindle, 17: Grinding wheel head, 19: Rotating shaft, 22: X-axis ball screw, 23: Z-axis ball screw, 25: Discharge electrode, G: Grinding stone, A, B: Diagonal feed Path Os: Workpiece axis.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 納谷 敏明 愛知県刈谷市朝日町１丁目１番地 豊田 工機株式会社内 (72)発明者 向井 良平 愛知県刈谷市朝日町１丁目１番地 豊田 工機株式会社内 (56)参考文献 特開 平３−131476（ＪＰ，Ａ) 特公 昭49−13668（ＪＰ，Ｂ１) 実公 昭48−41274（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) B24B 53/00 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Naya 1-1-1, Asahi-cho, Kariya-shi, Aichi Prefecture Inside Toyota Koki Co., Ltd. (72) Ryohei Mukai 1-1-1, Asahi-cho, Kariya-shi, Aichi Prefecture Toyota Koki (56) References JP-A-3-131476 (JP, A) JP-B-49-13668 (JP, B1) JUN-48-41274 (JP, Y1) (58) Fields surveyed (Int. Cl. 7 , DB name) B24B 53/00
Claims (2)
び砥石台と、 この主軸台に支承され、工作物を主軸中心線回りに回転
駆動する主軸と、 この砥石台に支承され、この主軸中心線に対して所定の
角度だけ傾けられた状態で回転駆動される砥石軸と、 この砥石軸に固定されて回転駆動され、この主軸中心線
に沿ってこの工作物と摺接すべき円錐面状の第１研削面
と、この第１研削面に直交しこの主軸中心線に対して垂
直にこの工作物と摺接すべき円錐面状の第２研削面と
を、外周面にもつ円盤状の砥石と、 この主軸中心線に沿った軸長方向と、この主軸中心線に
直交する半径方向とを合成した送り方向に、この主軸台
およびこの工作物に対してこの砥石を相対移動させる送
り機構と、 この主軸台のこの砥石台側に固定され、この主軸中心線
を法線とする平面に沿った肩部電極面と、この主軸中心
線に沿った外周電極面との、互いに直交する一対の電極
面をもった放電電極板を備えた放電ドレッシング装置
と、 を有する研削盤の使用方法であって、 前記砥石を、前記工作物に対して前記軸長方向と前記半
径方向とを合成した前記送り方向に所定の研削送り角度
で送り、前記第１研削面でこの工作物の外形の一部を円
筒面状の外周面に研削すると同時に、前記第２研削面で
この工作物の外形の他の一部をこの円筒面の一端から遠
心方向に立ち上がったリング状の端面に研削する研削過
程とは別に、 この砥石を、前記放電電極板に対して前記軸長方向と前
記半径方向とを合成した送り方向に所定のドレッシング
送り角度で送り、前記放電電極板の前記外周電極面でこ
の砥石のこの第１研削面にドレッシングを施すと同時
に、前記肩部電極面でこの第２研削面にドレッシングを
施すドレッシング過程を有する砥石修正方法において、 前記ドレッシング送り角度は、前記研削送り角度とは異
なり、放電ドレッシン グ量が前記第１研削面と前記第２
研削面とで略同等となる所定の角度に設定されているこ
とを特徴とする砥石修正方法。 A bed serving as a base, a headstock supported on the bed and movable relative to each other, and
The spindle is supported by the spindle head and the spindle head, and the workpiece is rotated around the spindle center line.
The main spindle to be driven and the spindle are supported by this grindstone head.
A grindstone shaft that is rotationally driven in a state of being tilted by an angle, and a main shaft centerline that is fixedly rotatably driven to the grindstone shaft
Conical first grinding surface to be in sliding contact with this workpiece along
Perpendicular to the first grinding surface and perpendicular to the spindle center line.
A second conical grinding surface to be brought into sliding contact with this workpiece
With a disc-shaped grinding wheel on the outer peripheral surface, in the axial direction along this spindle center line, and in this spindle center line.
In the feed direction that combines the orthogonal radial direction, the headstock
And to move the grinding wheel relative to the workpiece
The spindle mechanism is fixed to the spindle head side of the spindle head
The shoulder electrode surface along a plane normal to
A pair of electrodes orthogonal to each other with the outer electrode surface along the line
Dressing device with discharge electrode plate with surface
And a method of using a grinding machine, comprising:
A predetermined grinding feed angle in the feed direction combined with the radial direction
And a part of the outer shape of the workpiece is circled on the first grinding surface.
At the same time as grinding the outer peripheral surface of the cylindrical surface, the second grinding surface
Move another part of the contour of the workpiece away from one end of the cylindrical surface.
Grinding to grind the ring-shaped end surface rising in the center direction
Separately, this grindstone is placed in front of the discharge electrode plate in the axial direction.
Predetermined dressing in the feed direction combined with the radial direction
Feed at the feed angle, and
At the same time as dressing this first grinding surface of
Then, dressing the second ground surface with the shoulder electrode surface.
In the whetstone correcting method having a dressing process for applying, the dressing feed angle is different from the grinding feed angle.
Becomes, the discharge dressings amount the said first grinding face second
The angle must be set so that it is approximately equal to the ground surface.
And a grinding wheel correction method.
極板の前記外周電極面および前記肩部電極面の両電極面Both electrode surfaces of the outer peripheral electrode surface and the shoulder electrode surface of the electrode plate
に対してそれぞれ４５°である、Is 45 ° with respect to 請求項１記載の砥石修正方法。The grinding wheel repair method according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32053192A JP3350980B2 (en) | 1992-11-30 | 1992-11-30 | Whetstone correction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32053192A JP3350980B2 (en) | 1992-11-30 | 1992-11-30 | Whetstone correction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06155295A JPH06155295A (en) | 1994-06-03 |
| JP3350980B2 true JP3350980B2 (en) | 2002-11-25 |
Family
ID=18122479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32053192A Expired - Fee Related JP3350980B2 (en) | 1992-11-30 | 1992-11-30 | Whetstone correction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3350980B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5233629B2 (en) * | 2008-12-09 | 2013-07-10 | 株式会社ジェイテクト | Grinder |
-
1992
- 1992-11-30 JP JP32053192A patent/JP3350980B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06155295A (en) | 1994-06-03 |
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