JPS6332588B2 - - Google Patents
Info
- Publication number
- JPS6332588B2 JPS6332588B2 JP14783181A JP14783181A JPS6332588B2 JP S6332588 B2 JPS6332588 B2 JP S6332588B2 JP 14783181 A JP14783181 A JP 14783181A JP 14783181 A JP14783181 A JP 14783181A JP S6332588 B2 JPS6332588 B2 JP S6332588B2
- Authority
- JP
- Japan
- Prior art keywords
- radius
- grindstone
- rotation axis
- cylindrical jig
- ground
- 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
- 238000003754 machining Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000003672 processing method Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
- B24B13/023—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made for grinding several lenses simultaneously
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Description
【発明の詳細な説明】
本発明は、特殊光学系に用いるトーリツク面の
加工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing toric surfaces used in special optical systems.
トーリツク面は直交する２方向に異なる曲率を
有する曲面であり、乱視用眼鏡レンズに多用され
ている。曲率半径の絶対値が大きい方を母線、小
さい方を子線とすると、一般には母線半径R1と
子線半径R2との差が小さいため、カツプ状砥石
で子線半径R2を創成しながら、レンズ又は砥石
を回動させて母線半径R1を造り出す加工法が考
案され実用化されている。 A toric surface is a curved surface having different curvatures in two orthogonal directions, and is often used in spectacle lenses for astigmatism. If the one with the larger absolute value of the radius of curvature is the generatrix, and the one with the smaller absolute value is the daughter wire, the difference between the generatrix radius R1 and the daughter wire radius R2 is generally small, so the daughter wire radius R2 is created using a cup-shaped grindstone. However, a processing method has been devised and put into practical use that creates a generatrix radius R 1 by rotating a lens or a grindstone.
然し母線半径R1と子線半径R2との差が大きい
場合には、カツプ状砥石とレンズの相対的動きに
無理が生ずるためこの方法は採用できない。その
ため点接触工具でNC工作機などにより輪郭創成
をするほかなく、加工時間が長くなり、工具摩耗
による形状精度の低下をもたらすなどの欠点があ
つた。 However, if the difference between the generatrix radius R 1 and the sagittal radius R 2 is large, this method cannot be adopted because the relative movement between the cup-shaped grindstone and the lens will be unreasonable. Therefore, the contours had to be created using a point contact tool using an NC machine tool, which had disadvantages such as increased machining time and a decrease in shape accuracy due to tool wear.
本発明の目的は、上記の欠点を解消し、線状接
触によりトーリツク面を能率よく高精度に創成す
ることのできるトーリツク面の加工法を提供する
ことにあり、その要旨は、被研削物を母線半径
R1、子線半径R2を有するトーリツク面に加工す
る場合に於いて、円筒治具の周囲の母線半径R1
の位置に被研削物を固定し、該円筒治具をその中
心軸を中心に回転させ、同時に該円筒治具を中心
軸からR1―R2の点を通り前記中心軸と直角方向
の回動軸を中心に回動させ、被研削物との接触面
が被研削物の研削すべき子線半径R2と凹凸逆の
曲率半径を有する砥石を前記回動軸と直角方向の
その中心軸を中心に回転させながら、砥石を回動
軸から距離R2の位置で被研削物に接触させるこ
とにより被研削物をトーリツク面に研削すること
を特徴とするものである。 The purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a toric surface processing method that can efficiently create a toric surface with high precision through linear contact. Generatrix radius
R 1 , and when processing a toric surface with a sagittal radius R 2 , the generatrix radius R 1 around the cylindrical jig
The object to be ground is fixed at the position, the cylindrical jig is rotated around its central axis, and at the same time, the cylindrical jig is rotated from the central axis through the point R 1 - R 2 in a direction perpendicular to the central axis. A grindstone is rotated about a rotating shaft, and the contact surface with the object to be ground has a radius of curvature opposite to the radius R 2 of the minor wire to be ground on the object to be ground. It is characterized by grinding the workpiece to a toric surface by bringing the grindstone into contact with the workpiece at a distance R2 from the rotation axis while rotating the workpiece around the rotation axis.
次に本発明を図示の実施例に基づいて詳細に説
明する。 Next, the present invention will be explained in detail based on illustrated embodiments.
第１図は本発明に係る加工法の原理を示すもの
であり、回転軸Ａ―Ａを中心として回転する円筒
治具１の周囲に加工すべき多数個のレンズ２を固
定する。このレンズ２の数は多い方がよく、レン
ズ２同志の間隙が小さい程、研削抵抗の変動が少
なく安定した加工が加能となる。レンズ２の厚み
を加えた円筒治具１の半径は、トーリツク面の母
線半径R1に削り代を加えたものとし、回転軸Ｂ
―Ｂを中心として回転する円板状の砥石３を切込
みながら、円筒治具１の半径を測定して母線半径
R1を決める。又、円筒治具１は回転軸Ｃ―Ｃ（第
１図の紙面と直交する方向にある）を中心として
示矢方向に回動させる。回転軸Ｃ―Ｃの位置は、
回動運動により子線半径R2を同時に造り出すた
めに、円筒治具の回転軸Ａ―ＡからR1―R2の位
置に前記回転軸Ａ―Ａと直角方向に設定する。こ
の回動軸Ｃ―Ｃは、砥石３の回転軸Ｂ―Ｂとも直
角方向とし、砥石３の接触面はレンズ２と凹凸が
逆の子線半径R2とする。そして円筒治具１を回
転軸Ａ―Ａを中心に回転させながら、同時に回転
軸Ｃ―Ｃを中心に回動させ、回転する砥石３をレ
ンズ２に対し、回転軸Ｃ―Ｃから距離R2の位置
で接触させる。これにより砥石３はレンズ２を研
削し、母線半径R1と子線半径R2を有するトーリ
ツク面を有するレンズ２を製作できることにな
る。尚、砥石３の幅ｔは大きい程、砥石３の摩耗
が少なく、加工精度が向上し、更には加工能率も
よくなるので、少なくとも円筒治具１の高さｈ以
上にしておくことが好ましい。 FIG. 1 shows the principle of the processing method according to the present invention, in which a large number of lenses 2 to be processed are fixed around a cylindrical jig 1 that rotates around a rotation axis AA. It is better to have a large number of lenses 2, and the smaller the gap between the lenses 2, the less fluctuations in grinding resistance and the more stable machining becomes possible. The radius of the cylindrical jig 1 including the thickness of the lens 2 is the generatrix radius R1 of the toric surface plus the cutting allowance, and the rotation axis B
-Measure the radius of the cylindrical jig 1 while cutting with the disc-shaped grindstone 3 rotating around B, and find the generatrix radius.
Determine R 1 . Further, the cylindrical jig 1 is rotated in the direction indicated by the arrow around the rotation axis CC (located in a direction perpendicular to the paper plane of FIG. 1). The position of the rotation axis C-C is
In order to simultaneously create the sagittal wire radius R 2 by rotational movement, the cylindrical jig is set at a position R 1 -R 2 from the rotation axis AA in a direction perpendicular to the rotation axis AA. The rotation axis CC is also perpendicular to the rotation axis B-B of the grindstone 3, and the contact surface of the grindstone 3 has a sagittal radius R2 with convex and concave portions opposite to those of the lens 2. Then, while rotating the cylindrical jig 1 around the rotation axis A-A, the rotating grindstone 3 is rotated at a distance R 2 from the rotation axis CC to the lens 2. Make contact at the position. As a result, the grindstone 3 can grind the lens 2 to produce a lens 2 having a toric surface having a generatrix radius R 1 and a sagittal radius R 2 . The width t of the grindstone 3 is preferably at least the height h of the cylindrical jig 1 or more, since the larger the width t of the grindstone 3, the less the wear of the grindstone 3, the higher the machining accuracy, and the better the machining efficiency.
第２図は前述の原理に基づいたトーリツク面の
研削機の構成図を示し、基台４上に回動軸Ｃ―Ｃ
を中心に回動する回動台５を取付け、更にこの回
動台５上には砥石３の方向に移動し得る治具摺動
台６を設ける。この摺動台６に円筒治具１を固定
し図示しない駆動機構により円筒治具１をその回
転軸Ａ―Ａを中心に回転させる。又、基台４には
円筒治具１の方向に移動し得る砥石摺動台７を設
け、ここに砥石３を固定し図示しない駆動機構に
より砥石３をその回転軸Ｂ―Ｂを中心に回転す
る。尚、８は回動台５を円滑に回動させるための
ベアリング、９は研削液ノズルである。 FIG. 2 shows a configuration diagram of a toric surface grinding machine based on the above-mentioned principle.
A rotating table 5 that rotates around the center is attached, and a jig sliding table 6 that can move in the direction of the grindstone 3 is further provided on this rotating table 5. The cylindrical jig 1 is fixed to this sliding table 6, and is rotated about its rotation axis A--A by a drive mechanism (not shown). The base 4 is provided with a grindstone sliding table 7 that can move in the direction of the cylindrical jig 1, and the grindstone 3 is fixed thereto and rotated around its rotation axis B--B by a drive mechanism (not shown). do. Note that 8 is a bearing for smoothly rotating the rotary table 5, and 9 is a grinding fluid nozzle.
研削に当つては先ず治具摺動台６を調整して回
動軸Ｃ―Ｃと回転軸Ａ―Ａの間の距離をR1―R2
とし、更に砥石摺動台７を移動してレンズ２が回
動軸Ｃ―Ｃを中心に子線半径R2で研削できるよ
うに砥石３の位置を調整する。そして円筒治具１
及び砥石３を回転させながら、回動台５を回動さ
せれば、母線半径R1と同時に子線半径R2も決定
され、各レンズ２は所定の寸法に仕上げることが
できる。 When grinding, first adjust the jig sliding table 6 to set the distance between the rotation axis C-C and the rotation axis A-A to R 1 - R 2
Then, the grindstone sliding table 7 is moved to adjust the position of the grindstone 3 so that the lens 2 can be ground with a radius R 2 around the rotation axis CC. And cylindrical jig 1
By rotating the rotary table 5 while rotating the grindstone 3, the generatrix radius R1 and the sagittal radius R2 are determined at the same time, and each lens 2 can be finished to a predetermined size.
本発明に係るトーリツク面の加工法を実現する
には、第２図以外にも種々の装置が考えられる。
例えば第３図は他の実施例であり、砥石３の形状
を断面「コ」字型として第２図の実施例とは円筒
治具１に対して異なる方向の回転軸Ｂ―Ｂを中心
に回転させている。又、円筒治具１の母線半径
R1と子線半径R2との関係を逆にして、子線半径
R2に沿つて加工すべきレンズを多数個固定する
こともでき、この場合はレンズの取付け個数が減
少し、砥石の幅が大きくなり経済的にやや不利と
なるが、原理的に何ら変るところはない。更には
母線半径、子線半径の何れか一方が負のトーリツ
クレンズ、所謂鞍型レンズの加工についても、本
発明では治具と砥石との関係を逆にすることによ
り両方とも正の場合と何ら変ることなく加工がで
きる。加工の対象は実施例のレンズのみならず、
トーリツク面を有するものであればよく、例えば
成型用の親型の製造にも適用できる。 In order to realize the toric surface processing method according to the present invention, various devices other than those shown in FIG. 2 can be used.
For example, FIG. 3 shows another embodiment in which the shape of the grinding wheel 3 is U-shaped in cross section, and the rotation axis B--B is in a different direction with respect to the cylindrical jig 1 than the embodiment shown in FIG. 2. It's rotating. Also, the generatrix radius of the cylindrical jig 1
By reversing the relationship between R 1 and the minor wire radius R 2 , the minor wire radius is
It is also possible to fix a large number of lenses to be machined along R 2. In this case, the number of lenses to be mounted is reduced and the width of the grinding wheel becomes larger, which is somewhat economically disadvantageous, but there is no change in principle. There isn't. Furthermore, in the case of machining a Tory lens, a so-called saddle lens, in which either the generatrix radius or the sagittal radius is negative, the present invention reverses the relationship between the jig and the grindstone, so that it is no different from the case where both are positive. It can be processed without changing. The object of processing is not only the lens of the example,
Any material having a toric surface may be used, and it can be applied to, for example, the production of a parent mold for molding.
以上説明したように本発明に係るトーリツク面
の加工法は、被加工物を周囲に取付けた円筒治具
を、直角方向の２本の軸線を中心に回転・回動す
ると共に、砥石を回転させて研削するものであ
り、各種形状のトーリツク面が能率よく高精度に
加工できるものである。 As explained above, the toric surface processing method according to the present invention involves rotating a cylindrical jig around which a workpiece is attached around two orthogonal axes, and rotating a grindstone. This machine grinds toric surfaces of various shapes efficiently and with high precision.
第１図は本発明に係るトーリツク面の加工法の
原理を説明するための説明図、第２図はこの加工
法を実現するための研削機の構成図、第３図は治
具と砥石の他の組合せの構成図である。
符号１は治具、２はレンズ、３は砥石、４は基
台、５は回動台、６は治具摺動台、７は砥石摺動
台である。
Figure 1 is an explanatory diagram for explaining the principle of the toric surface machining method according to the present invention, Figure 2 is a configuration diagram of a grinding machine for realizing this machining method, and Figure 3 is a diagram of the jig and grindstone. It is a block diagram of another combination. 1 is a jig, 2 is a lens, 3 is a grindstone, 4 is a base, 5 is a rotating table, 6 is a jig sliding table, and 7 is a grindstone sliding table.
Claims (1)
るトーリツク面に加工する場合に於いて、円筒治
具の周囲の母線半径R1の位置に被研削物を固定
し、該円筒治具をその中心軸を中心に回転させ、
同時に該円筒治具を中心軸からR1―R2の点を通
り前記中心軸と直角方向の回転軸を中心に回動さ
せ、被研削物との接触面が被研削物の研削すべき
子線半径R2と凹凸逆の曲率半径を有する砥石を
前記回動軸と直角方向のその中心軸を中心に回転
させながら、砥石を回動軸から距離R2の位置で
被研削物に接触させることにより被研削物をトー
リツク面に研削することを特徴とするトーリツク
面の加工法。1 When processing a workpiece to be ground into a toric surface having a generatrix radius R 1 and a sagittal radius R 2 , the workpiece is fixed at a position around a cylindrical jig with a generatrix radius R 1 , and the cylindrical jig is Rotate the ingredient around its central axis,
At the same time, the cylindrical jig is rotated from the central axis through a point R 1 - R 2 about a rotation axis perpendicular to the central axis, so that the contact surface with the object to be ground is the part of the object to be ground. While rotating a grindstone having a radius of curvature opposite to the linear radius R 2 about its central axis perpendicular to the rotation axis, the grindstone is brought into contact with the workpiece at a distance R 2 from the rotation axis. A toric surface machining method characterized by grinding the object to be ground into a toric surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14783181A JPS5851062A (en) | 1981-09-21 | 1981-09-21 | Working for toric surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14783181A JPS5851062A (en) | 1981-09-21 | 1981-09-21 | Working for toric surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5851062A JPS5851062A (en) | 1983-03-25 |
| JPS6332588B2 true JPS6332588B2 (en) | 1988-06-30 |
Family
ID=15439223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14783181A Granted JPS5851062A (en) | 1981-09-21 | 1981-09-21 | Working for toric surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5851062A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176747A (en) * | 1986-01-28 | 1987-08-03 | レイザ− マグネテイツク ストレツジインタ−ナシヨナル カンパニ− | Method and device for producing toric single lens |
| JP2574278B2 (en) * | 1987-03-03 | 1997-01-22 | 松下電器産業株式会社 | Toric surface processing equipment |
-
1981
- 1981-09-21 JP JP14783181A patent/JPS5851062A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5851062A (en) | 1983-03-25 |
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