JPH07100752A - Curved surface working device - Google Patents

Curved surface working device

Info

Publication number
JPH07100752A
JPH07100752A JP24521093A JP24521093A JPH07100752A JP H07100752 A JPH07100752 A JP H07100752A JP 24521093 A JP24521093 A JP 24521093A JP 24521093 A JP24521093 A JP 24521093A JP H07100752 A JPH07100752 A JP H07100752A
Authority
JP
Japan
Prior art keywords
grindstone
axis
curved surface
workpiece
head
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
JP24521093A
Other languages
Japanese (ja)
Inventor
Teru Tsuboi
暉 坪井
Yukio Maeda
幸雄 前田
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.)
Toyoda Koki KK
Original Assignee
Toyoda Koki 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 Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP24521093A priority Critical patent/JPH07100752A/en
Publication of JPH07100752A publication Critical patent/JPH07100752A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve the curved surface formation precision having the less influence of thermal deformation by maintaining the relation of direction between the normal line of the free curved surface and a grinding wheel head at the contact point between a workpiece and a grinding wheel, always in the same state independently of the change of the normal line of the free curved surface. CONSTITUTION:A grinding wheel head 18 is swung by a prescribed angle around the A axis each time when a worktable 24 including a workpiece W is pitch-fed in the Y-axis direction, and in this state, the worktable 24 is including the workpiece W is cut-in-fed in the Z-axis direction through the traverse feed in the X-axis direction of a slide table 12 for grinding wheel including the grinding wheel head 18, and at the same time, the workpiece W is curved- surface-worked by swinging the grinding wheel head 18 around the B-axis.

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、アナモフィック曲面の
ような自由曲面を加工するための曲面加工装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved surface processing apparatus for processing a free curved surface such as an anamorphic curved surface.

【0002】[0002]

【従来の技術】従来、例えば、アナモフィック曲面を有
するレンズの成形用金型を曲面加工する場合は、図5に
示すように、マシニングセンタあるいはグライングセン
タ1に略半球状の形状をした砥石2を装着し、工作物3
をX軸方向に移動しながら、砥石2をZ軸方向に切込み
送り制御することにより、X軸方向にワンパス加工し、
このワンパス加工が終了したならば、工作物3をY軸方
向に1ピッチ分移動し、再びX軸とZ軸方向の同時2軸
制御によりワンパス加工を行う。以下、同様にして、図
6に示すように砥石2を工作物3に対し相対的にトラバ
ース動作させることにより、工作物1の全面を曲面に加
工する。
2. Description of the Related Art Conventionally, for example, when a molding die for a lens having an anamorphic curved surface is curved, as shown in FIG. 5, a grinding stone 2 having a substantially hemispherical shape is attached to a machining center or a grinding center 1. Put on the work piece 3
By moving the grindstone 2 in the Z-axis direction while cutting is moved in the X-axis direction, one-pass machining is performed in the X-axis direction.
When the one-pass machining is completed, the workpiece 3 is moved by one pitch in the Y-axis direction, and the one-pass machining is performed again by simultaneous two-axis control in the X-axis and Z-axis directions. Thereafter, similarly, as shown in FIG. 6, the grindstone 2 is traversed relative to the workpiece 3 to machine the entire surface of the workpiece 1 into a curved surface.

【0003】[0003]

【発明が解決しようとする課題】上記のような従来の曲
面加工装置では、砥石2が略半球形状をなしているた
め、X軸とZ軸の同時2軸制御により工作物3を曲面加
工すると、工作物と砥石との接触方向がワンパス加工毎
に変化し、このため、砥石2のアールが正確にツルーイ
ングされていないと、アールのツルーイング精度が工作
物の創成精度に反映してしまう。また、工作物3の曲面
中央に位置する頂点3a付近では、砥石2の周速がゼロ
に近くなるため、加工しにくく、曲面の形状精度に悪影
響を及ぼす問題がある。さらにまた、砥石2を装着する
グラインディングセンタと砥石の切込み送り方向が同一
であるため、グラインディングセンタに軸方向の熱変形
が生じると、この熱変形が切込み送りに作用し、工作物
の形状精度に悪影響を及ぼす問題があった。
In the conventional curved surface machining apparatus as described above, since the grindstone 2 has a substantially hemispherical shape, the curved surface machining of the workpiece 3 is performed by simultaneous biaxial control of the X axis and the Z axis. The contact direction between the workpiece and the grindstone changes with each one-pass machining. Therefore, if the radius of the grindstone 2 is not truly trued, the truing accuracy of the radius is reflected in the creation accuracy of the workpiece. Further, in the vicinity of the apex 3a located at the center of the curved surface of the workpiece 3, since the peripheral speed of the grindstone 2 is close to zero, it is difficult to process and the shape accuracy of the curved surface is adversely affected. Furthermore, since the grinding center on which the grindstone 2 is mounted and the cutting feed direction of the grindstone are the same, when thermal deformation occurs in the grinding center in the axial direction, this thermal deformation acts on the cutting feed, and the shape of the workpiece is cut. There was a problem that adversely affected the accuracy.

【0004】本発明は、上記の点に鑑みなされたもの
で、工作物と砥石との接触方向を常に同じ状態に維持で
きるとともに、熱変形の影響の少ない、曲面創成精度の
向上を可能にした曲面加工装置を提供することを目的と
する。
The present invention has been made in view of the above points, and it is possible to always maintain the contact direction between the workpiece and the grindstone in the same state, and to improve the accuracy of curved surface generation with less influence of thermal deformation. An object is to provide a curved surface processing device.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に本発明は、工作物に三次元の自由曲面を円盤状砥石に
より加工する曲面加工装置であって、工作物を支持する
支持部と、回転駆動される円盤状の砥石を有する砥石ヘ
ッドと、前記工作物と砥石とが互いに接離する切込み送
り方向に前記支持部と砥石ヘッドを相対移動させる第1
の駆動手段と、前記切込み送り方向と直角なトラバース
送り方向に前記支持部と砥石ヘッドを相対移動させる第
2の駆動手段と、前記トラバース送り方向と直角なピッ
チフィード送り方向に前記支持部と砥石ヘッドを相対移
動させる第3の駆動手段と、前記砥石ヘッドの砥石回転
軸を前記トラバース送り方向と直角なB軸と平行に配置
して該砥石ヘッドを前記B軸回りに砥石の外周がB軸と
接するようにして揺動させる第4の駆動手段と、前記砥
石ヘッドを前記ピッチフィード送り方向と平行でかつ前
記B軸と直交するA軸回りに砥石の外周がA軸と接する
ようにして揺動させる第5の駆動手段と、前記工作物と
砥石が接触した点の自由曲面の法線と砥石ヘッドとの関
係が自由曲面の法線が変化しても同じになるように曲面
形状データに基づいて前記第1,第2,第3,第4およ
び第5の駆動手段を制御する制御手段とを備える構成に
した。
In order to achieve the above object, the present invention is a curved surface processing apparatus for processing a three-dimensional free curved surface on a workpiece with a disk-shaped grindstone, and a support portion for supporting the workpiece. A grindstone head having a disk-shaped grindstone that is rotationally driven, and a relative movement of the support portion and the grindstone head in a cutting feed direction in which the workpiece and the grindstone come into contact with and separate from each other.
Drive means, second driving means for relatively moving the support portion and the grindstone head in a traverse feed direction perpendicular to the cutting feed direction, and the support portion and the grindstone in a pitch feed feed direction perpendicular to the traverse feed direction. Third driving means for relatively moving the head and a grindstone rotation axis of the grindstone head are arranged in parallel with a B axis perpendicular to the traverse feed direction, and the grindstone head is rotated about the B axis so that the outer circumference of the grindstone is the B axis. And a fourth driving means for swinging the whetstone in contact with the whetstone, and wobbling the whetstone head so that the outer circumference of the whetstone is in contact with the A axis about an A axis that is parallel to the pitch feed feed direction and orthogonal to the B axis. The curved surface shape data is set so that the relationship between the fifth drive means for moving and the normal line of the free curved surface at the point where the workpiece and the grindstone come into contact with the grindstone head is the same even if the normal line of the free curved surface changes. Based on The Te first, second, third, and to configure and control means for controlling the fourth and fifth drive means.

【0006】[0006]

【作用】本発明においては、前記第3の駆動手段により
支持部と砥石ヘッドを相対的にピッチフィード送りし、
該ピッチフィード送り毎に第5の駆動手段により砥石ヘ
ッドをA軸回りに所定角度揺動させ、そして第2の駆動
手段により支持部と砥石ヘッドをトラバース送り方向に
相対移動させながら、第1の駆動手段により支持部と砥
石ヘッドを相対移動させて切込み送りを与えると同時
に、第4の駆動手段により砥石ヘッドをB軸回りに曲面
形状データに応じて揺動させることにより、工作物の曲
面加工につれ自由曲面の法線が変化しても自由曲面の法
線と砥石ヘッドとの関係を常に同じ状態に維持すること
ができる。よって工作物の曲面形状の創成精度が向上さ
れる。
In the present invention, the support portion and the grindstone head are relatively pitch-fed by the third driving means,
The fifth driving means swings the grindstone head around the A axis by a predetermined angle for each pitch feed, and the second driving means relatively moves the support portion and the grindstone head in the traverse feeding direction, while Curved machining of a workpiece by simultaneously moving the support portion and the grindstone head by the driving means to give a cutting feed, and at the same time swinging the grindstone head around the B axis according to the curved surface shape data by the fourth driving means. Therefore, even if the normal line of the free-form surface changes, the relationship between the normal line of the free-form surface and the grindstone head can always be maintained in the same state. Therefore, the accuracy of creating the curved surface shape of the workpiece is improved.

【0007】[0007]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。図1は、本発明の曲面加工機及びその制御部の全
体を示す構成図、図2はその一部切欠きの側面図であ
る。図1および図2において、10はベッド、11はベ
ッド10上に固定した砥石用案内台であり、この案内台
11上には、砥石用スライドテーブル12がX軸方向
(トラバース送り方向)に移動可能に設置されている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the entire curved surface processing machine and its control unit of the present invention, and FIG. 2 is a side view of a part of the machine. In FIGS. 1 and 2, 10 is a bed, 11 is a grindstone guide table fixed on the bed 10, and the grindstone slide table 12 moves on the guide table 11 in the X-axis direction (traverse feed direction). It is installed as possible.

【0008】砥石用スライドテーブル12は、案内台1
1に設置したサーボモータ13および該サーボモータ1
3により回転される送りねじ機構(図示せず)とによっ
てX軸方向に移動される。
The slide table 12 for the grindstone is the guide 1
Servomotor 13 installed in 1 and the servomotor 1
It is moved in the X-axis direction by a feed screw mechanism (not shown) rotated by 3.

【0009】スライドテーブル12上に中央には、ター
ンテーブル14が支持機構14aによりX軸と直角なB
軸を中心にして回転可能に設置されており、このターン
テーブル14は、支持機構14aに設けたサーボモータ
15および該サーボモータ15の回転をターンテーブル
14に伝達する回転伝達機構(図示せず)によってB軸
回りに回転される。
At the center of the slide table 12, a turntable 14 is provided at a right angle to the X axis by a support mechanism 14a.
The turntable 14 is rotatably installed around a shaft, and the turntable 14 includes a servomotor 15 provided on the support mechanism 14a and a rotation transmission mechanism (not shown) for transmitting the rotation of the servomotor 15 to the turntable 14. Is rotated around the B axis.

【0010】ターンテーブル14上には、X軸方向に長
いブラケット16の中間部が固定されており、このブラ
ケット16の両端部16a,16b間には、砥石架台1
7の両端がB軸と直交するA軸回りに揺動可能に軸支さ
れていると共に、砥石架台17の中間部には、砥石ヘッ
ド18がB軸より、円盤状砥石182の半径に相当する
量偏心して設置されている。即ち、円盤状砥石182の
外周円がA軸およびB軸に外接する状態にある。
An intermediate portion of a bracket 16 which is long in the X-axis direction is fixed on the turntable 14, and between the both ends 16a and 16b of the bracket 16, the grindstone mount 1 is provided.
Both ends of 7 are pivotally supported about an A axis orthogonal to the B axis, and a grindstone head 18 corresponds to the radius of the disk-shaped grindstone 182 from the B axis in an intermediate portion of the grindstone mount 17. It is installed with eccentricity. That is, the outer peripheral circle of the disk-shaped grindstone 182 is in contact with the A axis and the B axis.

【0011】砥石架台17は、ブラケット16の端部1
6aに設けたサーボモータ19および該サーボモータ1
8の回転を砥石架台17に伝達する回転伝達機構(図示
せず)によってA軸回りに揺動される。また、砥石ヘッ
ド18は、砥石架台17に固定された砥石支持部材18
1と、この支持部材181にA軸と直交する軸線回りに
回転可能に軸支した円盤状の砥石182と、支持部材1
81に固定され砥石182を回転駆動する電動機183
を備える。
The grindstone mount 17 is an end portion 1 of the bracket 16.
Servo motor 19 provided in 6a and servo motor 1
A rotation transmission mechanism (not shown) that transmits the rotation of 8 to the grindstone mount 17 causes it to swing about the A axis. Further, the grindstone head 18 includes a grindstone support member 18 fixed to the grindstone mount 17.
1, a disk-shaped grindstone 182 that is rotatably supported on the support member 181 about an axis orthogonal to the A axis, and the support member 1
An electric motor 183 fixed to 81 for rotating the grindstone 182.
Equipped with.

【0012】図1および図2において、20は案内台1
1の右側方においてベッド10上に固定したワーク用案
内台であり、この案内台20上には、ワーク用スライド
テーブル21がX軸と直角なZ軸方向(切込み送り方
向)に移動可能に設置されている。ワーク用スライドテ
ーブル21は、案内台20に設置したサーボモータ22
および該サーボモータ23により回転される送りねじ機
構(図示せず)とによってZ軸方向に移動される。
In FIG. 1 and FIG. 2, 20 is a guide board 1.
1 is a work guide table fixed on the bed 10 on the right side of the table 1. A work slide table 21 is installed on the guide table 20 so as to be movable in the Z-axis direction (cutting feed direction) perpendicular to the X-axis. Has been done. The work slide table 21 includes a servo motor 22 installed on the guide 20.
And a feed screw mechanism (not shown) rotated by the servo motor 23 to move in the Z-axis direction.

【0013】ワーク用スライドテーブル21上にはコラ
ム23が鉛直に設置されており、このコラム23の砥石
ヘッド18と対向する側面には、ワークテーブル24が
Z軸と鉛直でB軸と平行なY軸方向(ピッチフィード送
り方向)に移動可能に設置されている。ワークテーブル
24は、コラム23上に設置したサーボモータ25およ
び該サーボモータ25により回転される送りねじ機構
(図示せず)とによってY軸方向に移動される。また、
ワークテーブル24の前面には、曲面加工される工作物
Wが取り付けられている。
A column 23 is vertically installed on the work slide table 21, and a work table 24 is provided on a side surface of the column 23 facing the grindstone head 18, the work table 24 being vertical to the Z axis and parallel to the B axis. It is installed so that it can move in the axial direction (pitch feed feed direction). The work table 24 is moved in the Y-axis direction by a servo motor 25 installed on the column 23 and a feed screw mechanism (not shown) rotated by the servo motor 25. Also,
A workpiece W to be curved is attached to the front surface of the work table 24.

【0014】図1において、30は曲面加工機全体を制
御し管理する数値制御装置であり、加工プログラム・曲
面加工用の形状データを読込むテープリーダおよびキー
パット等からなる入力装置31が接続されているととも
に、加工プログラム・曲面加工用の形状データ(X,
Y,Z,A,B)を格納する記憶装置32が接続されて
いる。
In FIG. 1, reference numeral 30 denotes a numerical control device for controlling and managing the entire curved surface processing machine, to which an input device 31 including a tape reader for reading a processing program and shape data for curved surface processing and a keypad is connected. In addition, the machining program and shape data for curved surface machining (X,
A storage device 32 for storing Y, Z, A, B) is connected.

【0015】さらに、数値制御装置30には、加工プロ
グラムおよび形状データに基づいて数値制御装置30か
ら出力される駆動指令信号により、それぞれのサーボモ
ータ13,15,19,22,25を駆動する駆動回路
33〜37が接続されている。
Further, the numerical controller 30 drives the servo motors 13, 15, 19, 22, 25 by driving command signals output from the numerical controller 30 based on the machining program and the shape data. The circuits 33 to 37 are connected.

【0016】上記構成において、サーボモータ13は第
2の駆動手段を、サーボモータ15は第4の駆動手段
を、サーボモータ19は第5の駆動手段を、サーボモー
タ22は第1の駆動手段を、サーボモータ25は第3の
駆動手段を、数値制御装置30は制御手段を、ワークテ
ーブル24は支持部をそれぞれ構成する。
In the above structure, the servo motor 13 serves as the second driving means, the servo motor 15 serves as the fourth driving means, the servo motor 19 serves as the fifth driving means, and the servo motor 22 serves as the first driving means. , The servo motor 25 constitutes a third driving means, the numerical controller 30 constitutes a controlling means, and the work table 24 constitutes a supporting portion.

【0017】次に、上記のように構成された本実施例の
曲面加工動作について説明する。工作物Wを曲面加工す
る場合は、まず、加工プログラムにしたがい数値制御装
置30を動作させることにより、曲面加工形状データ
(X,Y,Z,A,B)に応じたトラバース駆動指令信
号を駆動回路33を介してサーボモータ13に加え、こ
れにより、砥石ヘッド18を含めた砥石用スライドテー
ブル12をX軸方向に移動させる。この状態で、数値制
御装置30から切込み駆動指令信号を駆動回路36を通
してサーボモータ22に加えることにより、工作物Wを
含めたワーク用スライドテーブル21をZ軸方向に切込
み送りすると同時に、数値制御装置30からX軸方向の
トラバース送り位置に応じて出力されるB軸回りの角度
データBに応じた駆動指令信号を駆動回路34を通して
サーボモータ15に加えることにより、ターンテーブル
14をB軸回りに揺動させ、これにより、工作物WをX
軸方向にワンパス加工する。
Next, the curved surface processing operation of the present embodiment configured as described above will be described. When machining the workpiece W on a curved surface, first, by operating the numerical control device 30 according to the machining program, a traverse drive command signal corresponding to the curved surface machining shape data (X, Y, Z, A, B) is driven. The grindstone slide table 12 including the grindstone head 18 is moved in the X-axis direction in addition to the servomotor 13 via the circuit 33. In this state, by applying a cutting drive command signal from the numerical control device 30 to the servo motor 22 through the drive circuit 36, the workpiece slide table 21 including the workpiece W is cut and fed in the Z-axis direction, and at the same time, the numerical control device is operated. The turntable 14 is swung around the B-axis by applying a drive command signal corresponding to the angle data B around the B-axis, which is output from 30 according to the traverse feed position in the X-axis direction, to the servomotor 15 through the drive circuit 34. To move the workpiece W to X
One-pass machining in the axial direction.

【0018】なお、工作物Wをワンパス加工するに際
し、砥石ヘッド18を含むターンテーブル14をB軸回
りに揺動しないと、加工曲面に対する砥石182と工作
物Wとの接触点が曲面の中心からX軸と平行な方向の両
端へ行くにしたがいずれてしまい、曲面の創成精度に悪
影響を及ぼすことになるが、砥石ヘッド18を含むター
ンテーブル14をB軸回りに揺動制御することにより、
加工曲面に対する砥石182と工作物Wとの接触点はB
軸線上に常に維持される。これにより曲面形状の創成精
度が向上される。
When the work W is processed in one pass, unless the turntable 14 including the grindstone head 18 is swung about the B axis, the contact point between the grindstone 182 and the work W on the curved surface is from the center of the curved surface. Although it will eventually go to both ends in the direction parallel to the X-axis, which will adversely affect the accuracy of creating the curved surface, but by controlling the turntable 14 including the grindstone head 18 to swing about the B-axis,
The contact point between the grindstone 182 and the workpiece W on the processing curved surface is B
Always kept on axis. As a result, the precision with which the curved surface shape is created is improved.

【0019】また、工作物Wのワンパス加工に際し、砥
石ヘッド18を含むターンテーブル14をB軸回りに揺
動制御した場合、図3に示すように砥石182が工作物
Wの長尺方向(X軸と平行な方向)において、その一端
P1から曲面の中心Pへ相対的に移動するときは、ター
ンテーブル14はB軸を中心にして矢印Dに示す時計回
りに揺動する。これに対し、砥石182が曲面の中心P
から他端P2へ相対的に移動するときは、ターンテーブ
ル14はB軸を中心にして矢印Eに示す反時計回りに揺
動する。
When the turntable 14 including the grindstone head 18 is controlled to swing about the B axis during the one-pass machining of the work W, the grindstone 182 moves in the longitudinal direction (X) of the work W as shown in FIG. In the direction (parallel to the axis), when relatively moving from one end P1 to the center P of the curved surface, the turntable 14 swings clockwise about the B axis as shown by an arrow D. On the other hand, the grindstone 182 has the center P of the curved surface.
When relatively moving from the other end to the other end P2, the turntable 14 swings counterclockwise as indicated by an arrow E around the B axis.

【0020】このような加工制御を行うことにより、工
作物Wと砥石182との接触点P,P1,P2における
自由曲面の法線Fと砥石ヘッド18の向きが、自由曲面
の法線が変化しても同じ状態に維持される。
By performing such processing control, the free-form surface normal F at the contact points P, P1, P2 between the workpiece W and the grindstone 182 and the direction of the grindstone head 18 are changed. Even if it is kept the same.

【0021】一方、工作物Wに対する上述のワンパス加
工が終了すると、加工プログラムと形状データに基づき
数値制御装置30からピッチフィード駆動指令信号を駆
動回路37を通してサーボモータ25に加えることによ
り、ワークテーブル24をY軸方向に1ピッチ分移動す
る。
On the other hand, when the above-described one-pass machining of the workpiece W is completed, a pitch feed drive command signal is applied from the numerical control device 30 to the servo motor 25 through the drive circuit 37 based on the machining program and the shape data, so that the work table 24 is processed. Is moved by one pitch in the Y-axis direction.

【0022】さらに、数値制御装置30からY軸方向の
ピッチフィード送り位置に応じて出力されるA軸回りの
角度データAに応じた駆動指令信号を駆動回路35を通
してサーボモータ19に供給することにより、砥石ヘッ
ド18を含む砥石架台17をA軸回りに所定角度揺動さ
せる。これにより、図4に示すように、砥石先端のR部
の中心0を通って砥石回転軸線Lと直角な面40を工作
物Wと砥石182が接触した点における自由曲面の法線
Fに一致させる。
Further, by supplying the drive command signal corresponding to the angle data A about the A-axis output from the numerical controller 30 according to the pitch feed position in the Y-axis direction to the servo motor 19 through the drive circuit 35. The grindstone mount 17 including the grindstone head 18 is swung about the A axis by a predetermined angle. As a result, as shown in FIG. 4, the surface 40 that passes through the center 0 of the R portion at the tip of the grindstone and is perpendicular to the grindstone rotation axis L coincides with the normal line F of the free-form surface at the point where the workpiece W and the grindstone 182 contact each other. Let

【0023】したがって、いずれのピッチフィード位置
においても、工作物Wと砥石182との接触点における
自由曲面の法線Fが砥石ヘッド18の向きと同じ関係を
保つから、即ち砥石の回転軸線Lと直交しRの頂点を通
る面40と自由曲面の法線とが一致するから、自由曲面
の法線が変化しても自由曲面の法線と砥石との接触関係
は同じになり、従来の砥石のように工作物との接触方向
が変化することによる問題を解消できる。
Therefore, at any pitch feed position, the free-form curved surface normal line F at the contact point between the workpiece W and the grindstone 182 maintains the same relationship as the direction of the grindstone head 18, that is, the rotational axis L of the grindstone. Since the surface 40 orthogonal to each other and passing through the apex of R coincides with the normal line of the free-form surface, even if the normal line of the free-form surface changes, the contact relationship between the normal line of the free-form surface and the grindstone is the same. As described above, the problem caused by the change of the contact direction with the workpiece can be solved.

【0024】ワークテーブル24のY軸方向の1ピッチ
送りが終了した後は、再び上述のX,Z,Bの3軸制御
を行うことにより、工作物Wをワンパス加工する。以
下、同様な動作を繰り返すことにより、工作物Wの全面
を曲面形状データに応じ曲面に加工する。
After the one-pitch feed of the work table 24 in the Y-axis direction is completed, the above-mentioned three-axis control of X, Z and B is performed again to machine the workpiece W in one pass. Hereinafter, by repeating the same operation, the entire surface of the workpiece W is processed into a curved surface according to the curved surface shape data.

【0025】以上のような本実施例においては、砥石ヘ
ッド18を含む砥石用スライドテーブル12をX軸方向
に移動しながら、工作物Wを含むワーク用スライドテー
ブル21をZ軸方向に切込み送りすると同時に、砥石ヘ
ッド18を含むターンテーブル14をB軸回りに揺動し
て工作物Wをワンパス加工し、そして、工作物Wを含む
ワーク用スライドテーブル21をY軸方向に1ピッチ分
移動し、かつ砥石ヘッド18を含む砥石架台17をA軸
回りに所定角度揺動した後、再び上述のワンパス加工を
繰り返し行う構成にしたから、工作物Wと砥石182と
の接触方向、即ち接触点における自由曲面の法線Fと砥
石ヘッド18の向きとの関係を常に一定に維持すること
ができる。
In this embodiment as described above, when the grindstone slide table 12 including the grindstone head 18 is moved in the X-axis direction, the work slide table 21 including the workpiece W is cut and fed in the Z-axis direction. At the same time, the turntable 14 including the grindstone head 18 is swung about the B axis to process the workpiece W in one pass, and the work slide table 21 including the workpiece W is moved in the Y axis direction by one pitch. In addition, since the grindstone mount 17 including the grindstone head 18 is swung about the A axis by a predetermined angle and the above-described one-pass machining is repeatedly performed, the contact direction between the workpiece W and the grindstone 182, that is, the contact point is free. The relationship between the normal line F of the curved surface and the direction of the grindstone head 18 can always be kept constant.

【0026】これに伴い、工作物Wの曲面形状の創成精
度を向上できるとともに、砥石先端のR部のツルーイン
グ精度をあまり要しない。また、円盤状で大形の砥石を
使用できるため、砥石の摩耗による曲面形状精度への影
響も小さくできる。
As a result, the precision with which the curved surface shape of the workpiece W is created can be improved, and the truing precision at the R portion at the tip of the grindstone is not required so much. Further, since a large disc-shaped grindstone can be used, the influence of the abrasion of the grindstone on the curved surface shape accuracy can be reduced.

【0027】さらに、砥石182は工作物Wと平行な軸
方向に軸支されているため、砥石182の軸部の熱変化
による伸びの影響が極めて小さくなり、工作物の曲面加
工の精度を向上できる。さらにまた、砥石182の外周
がB軸と接するように砥石ヘッド18をA軸,B軸回り
に揺動させるので、A軸,B軸回りに砥石ヘッド18を
揺動させても砥石182と工作物Wの接触点がB軸上に
あり、ワークテーブル24の軸方向の位置を揺動に応じ
て補正する必要がない。
Further, since the grindstone 182 is axially supported in the axial direction parallel to the workpiece W, the influence of the elongation due to the heat change of the shaft portion of the grindstone 182 is extremely small, and the accuracy of the curved surface machining of the workpiece is improved. it can. Furthermore, since the grindstone head 18 is swung around the A axis and the B axis so that the outer periphery of the grindstone 182 is in contact with the B axis, even if the grindstone head 18 is swung around the A axis and the B axis, the grindstone 182 and the work piece are machined. Since the contact point of the object W is on the B-axis, it is not necessary to correct the axial position of the work table 24 according to the swing.

【0028】なお、本発明は上記実施例に示す構成のも
のに限定されず、請求項に記載した範囲を逸脱しない限
り、種々の変形が可能である。
The present invention is not limited to the structure shown in the above embodiment, and various modifications can be made without departing from the scope of the claims.

【0029】[0029]

【発明の効果】以上説明したように本発明によれば、工
作物支持部と砥石ヘッドを相対的にピッチフィードさせ
る毎に砥石ヘッドをA軸回りに曲面形状データに応じて
所定角度揺動させ、この状態で支持部と砥石ヘッドをト
ラバース送り方向に相対移動させながら、支持部と砥石
ヘッドを切込み送り方向に相対移動させると同時に砥石
ヘッドをB軸回り曲面形状データに応じ揺動させて工作
物を加工する構成にしたので、工作物と砥石とが接触し
て曲線加工しているときに、自由曲面の法線が変化して
も、自由曲面の法線と砥石ヘッドとの関係を同じ状態に
維持することができ、工作物の曲面形状の創成精度を向
上できる。
As described above, according to the present invention, the grindstone head is swung about the A axis by a predetermined angle according to the curved surface shape data every time the workpiece support portion and the grindstone head are relatively pitch-fed. In this state, while the support portion and the grindstone head are relatively moved in the traverse feed direction, the support portion and the grindstone head are relatively moved in the cutting feed direction, and at the same time, the grindstone head is swung in accordance with the curved surface shape data about the B axis for machining. Since it is configured to process an object, even if the normal of the free-form surface changes when the workpiece and the grindstone contact each other for curved processing, the relationship between the normal of the free-form surface and the grindstone head remains the same. It can be maintained in the state, and the accuracy of creating the curved surface shape of the workpiece can be improved.

【0030】また、砥石に円盤状の砥石を使用すること
により、砥石軸の熱変位による伸びの影響が減少し、創
成精度の向上をより期待できる。さらに、砥石の外周が
B軸と接するように砥石ヘッドをA軸,B軸回りに揺動
させるので、前記揺動に応じた位置補正が不要となり、
砥石ヘッド,支持部をどの位置へ動かすかを決める曲面
形状データの作成が簡単になる。
Further, by using a disk-shaped grindstone for the grindstone, the influence of elongation due to the thermal displacement of the grindstone shaft is reduced, and the creation accuracy can be expected to be improved. Further, since the grindstone head is swung around the A axis and the B axis so that the outer circumference of the grindstone contacts the B axis, position correction according to the swing becomes unnecessary,
It becomes easy to create curved surface shape data that decides where to move the grindstone head and support.

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

【図1】本発明の曲面加工機およびその制御部の全体を
示す構成図である。
FIG. 1 is a configuration diagram showing an entire curved surface processing machine of the present invention and a control unit thereof.

【図2】図1の一部切欠きの側面図である。FIG. 2 is a side view of the partial cutout of FIG.

【図3】本実施例における工作物と砥石との接触関係を
示す説明図である。
FIG. 3 is an explanatory diagram showing a contact relationship between a workpiece and a grindstone in the present embodiment.

【図4】本実施例における工作物と砥石との接触関係を
示す説明図である。
FIG. 4 is an explanatory diagram showing a contact relationship between a workpiece and a grindstone in the present embodiment.

【図5】従来の曲面加工装置の一例を示す説明図であ
る。
FIG. 5 is an explanatory diagram showing an example of a conventional curved surface processing apparatus.

【図6】従来における曲面加工法の説明図である。FIG. 6 is an explanatory diagram of a conventional curved surface processing method.

【符号の説明】 12 砥石用スライドテーブル 13 サーボモータ(第2の駆動手段) 14 ターンテーブル 15 サーボモータ(第4の駆動手段) 16 ブラケット 17 砥石架台 18 砥石ヘッド 182 砥石 19 サーボモータ(第5の駆動手段) 21 ワーク用スライドテーブル 22 サーボモータ(第1の駆動手段) 23 コラム 24 ワークテーブル(支持部) 25 サーボモータ(第3の駆動手段) 30 数値制御装置 32 メモリW 工作物[Description of Reference Signs] 12 slide table for whetstone 13 servo motor (second driving means) 14 turntable 15 servo motor (fourth driving means) 16 bracket 17 whetstone mount 18 whetstone head 182 whetstone 19 servomotor (fifth wheel) Driving means) 21 Work slide table 22 Servo motor (first driving means) 23 Column 24 Work table (supporting portion) 25 Servo motor (third driving means) 30 Numerical control device 32 Memory W Workpiece

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 工作物に三次元の自由曲面を円盤状砥石
により加工する曲面加工装置であって、 工作物を支持する支持部と、回転駆動される円盤状の砥
石を有する砥石ヘッドと、前記工作物と砥石とが互いに
接離する切込み送り方向に前記支持部と砥石ヘッドを相
対移動させる第1の駆動手段と、前記切込み送り方向と
直角なトラバース送り方向に前記支持部と砥石ヘッドを
相対移動させる第2の駆動手段と、前記トラバース送り
方向と直角なピッチフィード送り方向に前記支持部と砥
石ヘッドを相対移動させる第3の駆動手段と、前記砥石
ヘッドの砥石回転軸を前記トラバース送り方向と直角な
B軸と平行に配置して該砥石ヘッドを前記B軸回りに砥
石の外周がB軸と接するようにして揺動させる第4の駆
動手段と、前記砥石ヘッドを前記ピッチフィード送り方
向と平行でかつ前記B軸と直交するA軸回りに砥石の外
周がA軸と接するようにして揺動させる第5の駆動手段
と、前記工作物と砥石が接触した点の自由曲面の法線と
砥石ヘッドとの関係が自由曲面の法線が変化しても同じ
になるように曲面形状データに基づいて前記第1,第
2,第3,第4および第5の駆動手段を制御する制御手
段とを備えた曲面加工装置。
1. A curved surface machining apparatus for machining a three-dimensional free-form surface on a workpiece by means of a disk-shaped grindstone, comprising: a support portion for supporting the workpiece; a grindstone head having a disk-shaped grindstone that is rotationally driven; First driving means for relatively moving the support portion and the grindstone head in a cutting feed direction in which the workpiece and the grindstone are brought into contact with each other, and the support portion and the grindstone head in a traverse feed direction perpendicular to the cutting feed direction. Second drive means for relatively moving, third drive means for relatively moving the support portion and the grindstone head in a pitch feed feeding direction perpendicular to the traverse feeding direction, and a traverse feed for a grindstone rotating shaft of the grindstone head. A fourth driving means arranged parallel to the B axis perpendicular to the direction and swinging the grindstone head around the B axis so that the outer periphery of the grindstone contacts the B axis; and the grindstone head. And a free-form surface of a point where the workpiece and the grindstone are in contact with each other, and fifth driving means for swinging the grindstone so that the outer periphery of the grindstone is in contact with the A-axis about the A axis which is parallel to the feed direction and orthogonal to the B axis. Based on the curved surface shape data, the first, second, third, fourth and fifth driving means are set so that the relationship between the normal line of No. 2 and the grindstone head is the same even if the normal line of the free curved surface changes. A curved surface processing apparatus having a control means for controlling.
JP24521093A 1993-09-30 1993-09-30 Curved surface working device Pending JPH07100752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24521093A JPH07100752A (en) 1993-09-30 1993-09-30 Curved surface working device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24521093A JPH07100752A (en) 1993-09-30 1993-09-30 Curved surface working device

Publications (1)

Publication Number Publication Date
JPH07100752A true JPH07100752A (en) 1995-04-18

Family

ID=17130272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24521093A Pending JPH07100752A (en) 1993-09-30 1993-09-30 Curved surface working device

Country Status (1)

Country Link
JP (1) JPH07100752A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100387397C (en) * 2005-02-01 2008-05-14 朱志刚 Control method and device for crystal ball grinding / polishing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100387397C (en) * 2005-02-01 2008-05-14 朱志刚 Control method and device for crystal ball grinding / polishing machine

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