JPH0155945B2 - - Google Patents
Info
- Publication number
- JPH0155945B2 JPH0155945B2 JP55143895A JP14389580A JPH0155945B2 JP H0155945 B2 JPH0155945 B2 JP H0155945B2 JP 55143895 A JP55143895 A JP 55143895A JP 14389580 A JP14389580 A JP 14389580A JP H0155945 B2 JPH0155945 B2 JP H0155945B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- drive shaft
- centering
- rotary grindstone
- rotational speed
- 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
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 description 28
- 239000010432 diamond Substances 0.000 description 28
- 230000008859 change Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 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
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
- B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
- B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
- B24B9/146—Accessories, e.g. lens mounting devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (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】
本発明はレンズの芯取および面取を行なう芯取
機の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a centering machine for centering and chamfering lenses.
周知のようにレンズの芯取および面取（以下場
合によつて芯取および面取を総称して芯取と称す
る）工程においては研磨されたレンズをその光軸
を中心として回転せしめ、それに回転砥石（ダイ
ヤモンドツール）を当てて外縁の切削および側縁
の面取を行なう。その回転砥石は通常円筒面を有
する芯取部とその芯取部の両側に突出する傾斜し
た環状面を有する面取部とを備えている。また直
角面取が必要な場合にはその面取部の周面に前記
円筒面の軸にほぼ直角に半径方向外方に延びる環
状面を有する直角面取部を備えた回転砥石が使用
される。 As is well known, in the lens centering and chamfering process (hereinafter, centering and chamfering are collectively referred to as centering), a polished lens is rotated around its optical axis, and then rotated. Apply a grindstone (diamond tool) to cut the outer edge and chamfer the side edges. The rotating grindstone usually includes a centering portion having a cylindrical surface and a chamfered portion having an inclined annular surface projecting on both sides of the centering portion. If a right-angle chamfer is required, a rotary grindstone is used that has a right-angle chamfer on the circumferential surface of the chamfer, which has an annular surface extending radially outward at approximately right angles to the axis of the cylindrical surface. .
前記回転砥石はレンズの回転軸に対してほぼ直
角な方向およびほぼ平行な方向に移動可能なよう
に支持されており、実際の芯取に際しては、まず
回転しているレンズに対してその回転軸に直角に
移動せしめられ（切込送り）、前記芯取部がレン
ズの周縁に当てられ、これによつてレンズの外縁
が光軸を中心として真円になるように切削され
る。次のその回転砥石がレンズの光軸に平行な方
向に移動せしめられ（横送り）、前記面取部がレ
ンズの一側面に当てられ面取が行なわれる。直角
面取が必要な場合には、回転砥石を更に横送りし
て前記直角面取部がその側面に当てられる。さら
にレンズの他の面の面取が必要な場合には回転砥
石を逆方向に横送りしてもう一方の面取部がレン
ズのその面に当てられる。 The rotating grindstone is supported so as to be movable in a direction substantially perpendicular to and substantially parallel to the rotation axis of the lens, and during actual centering, first the rotation axis is moved against the rotating lens. The centering portion is moved perpendicularly to the lens (cutting feed), and the centering portion is brought into contact with the peripheral edge of the lens, thereby cutting the outer edge of the lens into a perfect circle around the optical axis. Next, the rotating grindstone is moved in a direction parallel to the optical axis of the lens (transverse movement), and the chamfer is brought into contact with one side of the lens to effect chamfering. If a right-angled chamfer is required, the rotary grindstone is further moved horizontally so that the right-angled chamfer is applied to the side surface of the grindstone. Furthermore, if it is necessary to chamfer another surface of the lens, the rotary grindstone is moved laterally in the opposite direction and the other chamfered portion is applied to that surface of the lens.
上記のような芯取作業は通常、レンズが６回転
あるいは９回転するうちに完了するようになつて
おり、前記回転砥石の切込送りおよじ横送りは、
レンズが６回転あるいは９回転する間に１回転す
る互いに同軸に固定された切込カムおよび横送り
カムによつて制御される。 The above-mentioned centering work is usually completed within 6 or 9 rotations of the lens, and the cutting feed and lateral feed of the rotary grindstone are
It is controlled by a cutting cam and a transverse feed cam that are coaxially fixed to each other and rotate once during each 6 or 9 rotations of the lens.
レンズの回転速度は得られる製品の品質に影響
し、例えば直角面取をするときにレンズの回転速
度が大きいと有効径の外縁部にピリが生ずる等の
問題が発生する。これに対してレンズの外周面を
切削する芯取の場合にはレンズの回転速度が比較
的大きくても差し支えない。しかしながら、従来
の芯取機においてはレンズの回転速度が終始一定
に保たれるようになつているため、レンズの回転
速度は最も問題の出易い研削部分を基準にして設
定しなければならず、したがつてレンズを比較的
高速で回転させて良い場合でも低速で回転させて
いるため、余分な時間がかかるという欠点があ
る。 The rotational speed of the lens affects the quality of the resulting product; for example, if the rotational speed of the lens is high when performing right-angle chamfering, problems such as tingling will occur at the outer edge of the effective diameter. On the other hand, in the case of centering in which the outer peripheral surface of the lens is cut, there is no problem even if the rotational speed of the lens is relatively high. However, in conventional centering machines, the rotational speed of the lens is kept constant throughout, so the rotational speed of the lens must be set based on the grinding part where problems are most likely to occur. Therefore, even if the lens can be rotated at a relatively high speed, it is rotated at a low speed, which has the disadvantage of taking extra time.
このような事情に鑑みて本出願人は以前に研削
部分に応じてレンズの回転速度を変え、それによ
つて作業時間を短縮した芯取機を発明し、出願し
た（特願昭55−38723号）。 In view of these circumstances, the applicant previously invented and applied for a centering machine that changes the rotational speed of the lens depending on the part to be ground, thereby shortening the working time (Japanese Patent Application No. 55-38723). ).
その特許出願に係る芯取機は、切込カムおよび
横送りカムの回転軸の回転角度によつて回転砥石
の作業工程が分かることに着目し、その回転軸の
回転角度を角度検出手段によつて検出し、その角
度検出手段によつて検出された回転軸の回転角度
に応じてレンズ回転用のモーターの回転速度を制
御するようにしたことを特徴とするものである。 The centering machine according to the patent application focuses on the fact that the working process of the rotary grindstone can be determined by the rotation angle of the rotation shaft of the cutting cam and the cross feed cam, and uses an angle detection means to detect the rotation angle of the rotation shaft. The present invention is characterized in that the rotational speed of the lens rotation motor is controlled in accordance with the rotational angle of the rotational shaft detected by the angle detection means.
本出願人は上記芯取機について更に研究を重ね
た結果、切削中にレンズの回転速度に応じて回転
砥石の回転速度を変えることによつて製品の品質
を高めることができるとともに、得率を増すこと
ができることを発見した。 As a result of further research on the above-mentioned centering machine, the applicant has found that by changing the rotation speed of the rotary grindstone according to the rotation speed of the lens during cutting, it is possible to improve the quality of the product and increase the yield rate. I discovered that it is possible to increase
すなわち本発明の芯取機は上記特許出願にかか
る芯取機において、前記角度検出手段によつて検
出した駆動軸の回転角度に応じて、回転砥石を回
転させるモーターの回転速度を変化させるように
したことを特徴とするものである。 That is, the centering machine of the present invention is the centering machine according to the above patent application, in which the rotational speed of the motor for rotating the rotary grindstone is changed according to the rotation angle of the drive shaft detected by the angle detection means. It is characterized by the fact that
前記レンズ回転用のモーターおよび回転砥石回
転用のモーターとしては周波数を変えることによ
つて回転速度を無段的に変えることのできるイン
ダクシヨンモーターや直流モーターを使用するこ
とができる。また必ずしも無段変速できる必要は
なく、回転速度を何段かに変えることができるよ
うなものでも実用上差し支えない。 As the motor for rotating the lens and the motor for rotating the grindstone, an induction motor or a direct current motor, which can change the rotation speed steplessly by changing the frequency, can be used. Further, it is not necessarily necessary to be able to continuously change the speed, and a device that can change the rotational speed in several steps may be used in practice.
なお、レンズのある回転速度に対して適当な回
転砥石の回転速度はレンズの径およびレンズの材
料に依存するか、当業者であれば試行錯誤によつ
て容易に発見することができる。 It should be noted that the appropriate rotational speed of the grindstone for a certain rotational speed of the lens depends on the diameter of the lens and the material of the lens, and can be easily discovered by those skilled in the art through trial and error.
以下図面を参照して本発明の実施例を詳細に説
明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の一実施例の芯取機の構造を示
す概略図である。第１図において本実施例の芯取
機は同軸に回転するベルレンズ軸１およびワーク
レンズ軸２を備えている。その両レンズ軸１，２
は互いに対向する端部にレンズホルダー３，４を
それぞれ備えており、そのレンズホルダー３，４
によつて芯取すべきレンズ５をその光軸が前記両
レンズ軸１，２の回転軸と一致するようにして挾
持するようになつている。また両レンズ軸１，２
の外端には歯車６，７が固定されている。その両
歯車６，７は図示してない歯車群を介して、駆動
軸８に固定された歯車９に連結され同一速度で回
転せしめられるようになつている。前記歯車群は
駆動軸８が１回転するうちに前記両レンズ軸１，
２を６回転あるいは９回転させるように構成され
ており、歯車の組合わせによつて６回転と９回転
のいずれをも選択することができるようになつて
いる。 FIG. 1 is a schematic diagram showing the structure of a centering machine according to an embodiment of the present invention. In FIG. 1, the centering machine of this embodiment includes a bell lens shaft 1 and a work lens shaft 2 that rotate coaxially. Both lens axes 1 and 2
is equipped with lens holders 3 and 4 at mutually opposing ends, respectively, and the lens holders 3 and 4
The lens 5 to be centered is held in such a manner that its optical axis coincides with the rotation axes of the lens shafts 1 and 2. Also, both lens axes 1 and 2
Gears 6 and 7 are fixed to the outer ends of. Both gears 6 and 7 are connected to a gear 9 fixed to a drive shaft 8 via a gear group (not shown) so that they are rotated at the same speed. The gear group rotates between the lens shafts 1, 1, and 1 while the drive shaft 8 rotates once.
2 rotates 6 or 9 times, and either 6 or 9 turns can be selected depending on the combination of gears.
前記駆動軸８はモーターM1によつて回転せし
められる。なお、駆動軸８は通常は図示してない
減速機構を介してモーターM1に接続されている。 The drive shaft 8 is rotated by a motor M1 . Note that the drive shaft 8 is normally connected to the motor M1 via a speed reduction mechanism (not shown).
砥石軸１０の先端にダイヤモンドツール１１が
着脱自在に取り付けられ、速度可変モーターM2
を含む駆動機構Ｄによつて高速で回転せしめられ
るようになつている。砥石軸１０は前記両レンズ
軸１，２の回転軸に直角な方向に揺動自在に、か
つその回転軸に平行な方向に移動自在に支持され
ており、前記ダイヤモンドツールがレンズ５に近
づく方向、および左方に付勢されている。また砥
石軸１０は前記駆動軸８に固定された切込カム１
２および横送りカム１３に作用的に連結され、揺
動および平行移動を制御されるようになつている
が、その連動機構は公知であるから、第１図では
省略した。前記ダイヤモンドツール１１はレンズ
５の芯取、すなわち外縁の切削、および左右の面
取をするように設計されており、円筒面を有する
芯取部１１ａ、その芯取部１１ａの左側から斜め
に立ち上がる環状の傾斜面を有する左面取部１１
ｂおよび前記芯取部の右側から斜めに立ち上がる
環状の傾斜面を有する右面取部１１ｃからなつて
いる。このダイヤモンドツール１１は後に詳述す
るように、まずレンズ５の光軸に直角な方向に移
動せしめられる（切込送り）。これによつて前記
芯取部１１ａによつてレンズ５の外縁が切削され
る。次にレンズ５の光軸に平行な方向に右に移動
せしめられて（横送り）、前記左面取部１１ｂが
レンズ５の左面に当てられ、レンズ５の左面が面
取される。さらにその左面取終了後にダイヤモン
ドツール１１が左方向に移動せしめられ、前記右
面取部１１ｃがレンズ５の右面に当てられ、レン
ズ５の右面が面取される。その右面取の終了後、
ダイヤモンドツール１１がレンズ５から離され、
第１図に示す位置に復帰せしめられる。周知のよ
うにこの間レンズ５は回転せしめられており、ダ
イヤモンドツール１１の位置は砥石軸１０に接続
された前記切込カム１２と横送りカム１３によつ
て制御される。 A diamond tool 11 is removably attached to the tip of the grinding wheel shaft 10, and a variable speed motor M2
It is designed to be rotated at high speed by a drive mechanism D including. The grindstone shaft 10 is supported so as to be swingable in a direction perpendicular to the rotational axes of the lens shafts 1 and 2, and to be movable in a direction parallel to the rotational axes, so that the diamond tool approaches the lens 5. , and is biased to the left. Further, the grinding wheel shaft 10 has a cutting cam 1 fixed to the drive shaft 8.
2 and the cross-feeding cam 13, and are designed to control rocking and parallel movement, but since the interlocking mechanism is well known, it is omitted in FIG. The diamond tool 11 is designed to center the lens 5, that is, cut the outer edge, and chamfer the left and right sides. Left chamfered portion 11 having an annular inclined surface
b, and a right-hand chamfered portion 11c having an annular inclined surface rising obliquely from the right side of the centering portion. As will be described in detail later, this diamond tool 11 is first moved in a direction perpendicular to the optical axis of the lens 5 (cutting feed). As a result, the outer edge of the lens 5 is cut by the centering portion 11a. Next, the lens 5 is moved to the right in a direction parallel to the optical axis (transverse movement), and the left chamfered portion 11b is brought into contact with the left surface of the lens 5, so that the left surface of the lens 5 is chamfered. Furthermore, after the left chamfering is completed, the diamond tool 11 is moved to the left, the right chamfering portion 11c is brought into contact with the right surface of the lens 5, and the right surface of the lens 5 is chamfered. After completing the right chamfer,
The diamond tool 11 is separated from the lens 5,
It is returned to the position shown in FIG. As is well known, during this time the lens 5 is being rotated, and the position of the diamond tool 11 is controlled by the cutting cam 12 and the traversing cam 13 connected to the grindstone shaft 10.
前記駆動軸８に３個の突起部材１４，１５，１
６が着脱自在に固定されている。この突起部材１
４，１５，１６は駆動軸８の周囲に締め付けられ
るリング状ベルト部材に半径方向外側に突出する
突起を設けてなつており、その突起が駆動軸８の
周方向の任意の位置に突出するようにして駆動軸
８に固定することができるようになつている。駆
動軸８に平行に第１〜第３のマイクロスイツチ１
７，１８，１９が配されている。このマイクロス
イツチ１７，１８，１９は前記突起部材１４，１
５，１６によつてそれぞれ作動されるアクチユエ
ータを備え、これらマイクロスイツチはモーター
M1の回転速度を制御する制御部に接続され、各
マイクロスイツチ１７，１８，１９が作動される
毎に前記モーターM1の回転速度が変えられる。
このマイクロスイツチ１７，１８，１９はさらに
ダイヤモンドツール１１の駆動機構Ｄのモーター
M2の回転速度を制御する制御部にも接続されて
いる。前述のように前記切込カム１２および横送
りカム１３は駆動軸８と一体的に回転するから駆
動軸８の回転角度によつてダイヤモンドツール１
１の作業工程を知ることができる。したがつて前
記突起部材１４，１５，１６の位置を選択するこ
とによつてモーターM1の回転速度を変えて、レ
ンズ５の回転速度を必要に応じて切り換えること
ができる。これと同時にダイヤモンドツール１１
の回転速度も変えられる。なお、本実施例におい
ては突起部材１４，１５，１６の駆動軸８上での
角度的位置を変えるようにしたが、突起部材１
４，１５，１６の角度的位置を同じにして、マイ
クロスイツチ１７，１８，１９の位置を変えても
よい。また本実施例においては突起部材１４，１
５，１６とマイクロスイツチ１７，１８，１９に
よつて駆動軸８の回転角度を検出してモーター
M1およびM2の回転速度を切り換えるようにした
が、光電スイツチ等の他の回転角度検出手段を用
いてもよい。また本実施例においては３個の突起
部材１４，１５，１６と３個のマイクロスイツチ
１７，１８，１９を使用して４段に回転速度を切
り換えるようにしたが、突起部材とマイクロスイ
ツチの数を変えることによつて何段にでも切り換
えることができるのは言うまでもない。なお、レ
ンズの回転速度を変える度にダイヤモンドツール
の回転速度を常に変える必要がある分けではな
い。 Three protruding members 14, 15, 1 are provided on the drive shaft 8.
6 is removably fixed. This protruding member 1
Numerals 4, 15, and 16 are ring-shaped belt members that are tightened around the drive shaft 8 and are provided with protrusions that protrude outward in the radial direction, such that the protrusions protrude at arbitrary positions in the circumferential direction of the drive shaft 8. It is designed so that it can be fixed to the drive shaft 8. The first to third micro switches 1 are arranged parallel to the drive shaft 8.
7, 18, and 19 are arranged. These micro switches 17, 18, 19 are connected to the projection members 14, 1.
5 and 16, respectively, and these microswitches are operated by motors.
It is connected to a control unit that controls the rotational speed of the motor M1 , and the rotational speed of the motor M1 is changed every time each micro switch 17, 18, 19 is operated.
These micro switches 17, 18, 19 are further connected to the motor of the drive mechanism D of the diamond tool 11.
It is also connected to the control unit that controls the rotation speed of M2 . As mentioned above, since the cutting cam 12 and the lateral feed cam 13 rotate integrally with the drive shaft 8, the rotation angle of the drive shaft 8 determines the rotation angle of the diamond tool 1.
You can learn about the work process of step 1. Therefore, by selecting the positions of the projecting members 14, 15, and 16, the rotational speed of the motor M1 can be changed, and the rotational speed of the lens 5 can be switched as required. At the same time, Diamond Tool 11
The rotation speed can also be changed. In this embodiment, although the angular positions of the protruding members 14, 15, and 16 on the drive shaft 8 are changed, the protruding members 1
The angular positions of the microswitches 4, 15, and 16 may be the same, and the positions of the microswitches 17, 18, and 19 may be changed. Further, in this embodiment, the protrusion members 14, 1
5, 16 and micro switches 17, 18, 19 to detect the rotation angle of the drive shaft 8 and turn the motor on.
Although the rotation speeds of M 1 and M 2 are switched, other rotation angle detection means such as a photoelectric switch may be used. In addition, in this embodiment, three protruding members 14, 15, 16 and three micro switches 17, 18, 19 are used to switch the rotation speed in four stages, but the number of protruding members and micro switches is Needless to say, it is possible to switch to any number of stages by changing . Note that it is not necessary to always change the rotation speed of the diamond tool every time the rotation speed of the lens is changed.
次に、第２図を参照して本発明の芯取機に使用
される切込カム１２および横送りカム１３とモー
ターM1の回転速度を切り換えるタイミングの関
係の一例について説明する。 Next, an example of the relationship between the cutting cam 12 and the cross-feeding cam 13 used in the centering machine of the present invention and the timing of switching the rotational speed of the motor M1 will be described with reference to FIG.
第２図は切込カム１２と横送りカム１３の１例
のカム面の高さの展開図である。本例の切込カム
１２のカム面は第２図に実線で示すように回転開
始位置Ｓから20゜までは比較的急角度で下降し、
20゜から100゜までは比較的緩い角度で下降し、さ
らに100゜から340゜までは下降した位置で水平に延
び、340゜から355゜までは急角度で上昇し、回転開
始位置Ｓの高さに達し、355゜から360゜まではその
高さで水平に延びている。 FIG. 2 is a developed view of the height of the cam surfaces of an example of the cutting cam 12 and the lateral feed cam 13. The cam surface of the cutting cam 12 in this example descends at a relatively steep angle up to 20 degrees from the rotation start position S, as shown by the solid line in FIG.
From 20° to 100° it descends at a relatively gentle angle, then from 100° to 340° it extends horizontally at the lowered position, and from 340° to 355° it rises at a steep angle, increasing the height of the rotation start position S. It reaches a height of 355° and extends horizontally from 360° to 360°.
また横送りカム１３のカム面は回転開始位置か
ら10゜までは同じ高さを保ち、10゜から180゜までは
比較的緩い角度で下降し180゜から230゜でその下降
した高さを保ち、230゜から280゜までは比較的急角
度で回転開始位置より僅かに低い位置まで上昇
し、さらに280゜から290゜まで比較的緩い角度で回
転開始位置の高さまで上昇して、360゜までその高
さを保つ。 In addition, the cam surface of the cross-feeding cam 13 maintains the same height up to 10 degrees from the rotation start position, descends at a relatively gentle angle from 10 degrees to 180 degrees, and maintains the lowered height from 180 degrees to 230 degrees. , from 230° to 280° it rises at a relatively steep angle to a position slightly lower than the rotation start position, and then from 280° to 290° it rises to the height of the rotation start position at a relatively gentle angle until it reaches 360°. maintain that height.
切込カム１２と横送りカム１３のこのような形
状によつて、ダイヤモンドツール１１は駆動軸８
が回転を開始して20゜までにレンズ５の外縁から
離れた位置からレンズ５の外縁に向かつて急速に
近づけられ、その間に僅かに第１図中右方に移動
され、駆動軸８が20゜回転した位置で前記芯取部
１１ａがレンズ５の外縁に当接せしめられる。こ
こからレンズ５の外縁の切削（芯取）が始めら
れ、駆動軸８が100゜回転するまでにレンズ５の外
縁は切込カム１２のカム面の20゜の位置と100゜の
位置の高さの差だけ削られる。その間にダイヤモ
ンドツール１１は右方向にも送られ、駆動軸８が
ほぼ100゜回転した位置で左面取部１１ｂがレンズ
５の左面に当接し始め駆動軸８が180゜回転するま
で左面の面取が行なわれる。180゜から230゜までは
ダイヤモンドツール１１は同じ位置に保持される
から、ここではレンズ５の左面の面取すべき部分
の削り残し部分が削られるだけである。さらに駆
動軸８が230゜から280゜まで回転するうちにダイヤ
モンドツール１１は急激に左方に移動され、280゜
において右面取部１１ｃがレンズ５の右面に当接
し始め、ここから290゜までの間は比較的ゆつくり
と左方に送られ、290゜以降はその位置に保たれ
る。さらに駆動軸８が340゜回転すると前述のよう
に切込カム１２が上昇し始めるから、ダイヤモン
ドツール１１がレンズ５から離れ始める。したが
つて340゜において右面取が終了し、それ以後ダイ
ヤモンドツール１１は元の位置に復帰する。な
お、ダイヤモンドツール１１が駆動軸８のどの回
転角度でレンズ５の各部に当接し始めるかは、レ
ンズ５の径や厚みによつて異なり、上記のような
工程は一つの例を示すものである。 Due to the shapes of the cutting cam 12 and the lateral feed cam 13, the diamond tool 11 is
starts rotating, and by 20 degrees, it is rapidly moved from a position away from the outer edge of the lens 5 toward the outer edge of the lens 5, and during this time, it is moved slightly to the right in FIG. At the rotated position, the centering portion 11a is brought into contact with the outer edge of the lens 5. Cutting (centering) the outer edge of the lens 5 starts from here, and by the time the drive shaft 8 has rotated 100 degrees, the outer edge of the lens 5 is at the height of the cam surface of the cutting cam 12 at the 20 degree position and the 100 degree position. Only the difference in size is removed. In the meantime, the diamond tool 11 is also sent to the right, and at a position where the drive shaft 8 has rotated approximately 100 degrees, the left chamfer portion 11b begins to come into contact with the left surface of the lens 5, and until the drive shaft 8 has rotated 180 degrees, the left surface is chamfered. will be carried out. Since the diamond tool 11 is held at the same position from 180° to 230°, only the uncut portion of the left surface of the lens 5 to be chamfered is removed here. Further, as the drive shaft 8 rotates from 230° to 280°, the diamond tool 11 is rapidly moved to the left, and at 280°, the right chamfered portion 11c begins to come into contact with the right surface of the lens 5, and from there it rotates to 290°. The distance is moved relatively slowly to the left, and it remains in that position after 290°. When the drive shaft 8 further rotates by 340 degrees, the cutting cam 12 begins to rise as described above, and the diamond tool 11 begins to move away from the lens 5. Therefore, the right chamfering is completed at 340°, after which the diamond tool 11 returns to its original position. Note that the rotational angle of the drive shaft 8 at which the diamond tool 11 starts to come into contact with each part of the lens 5 depends on the diameter and thickness of the lens 5, and the above process is just one example. .
また、上記の例は芯取と左右の面取を行なう場
合を例にとつたものであり、例えば直角面取もす
る場合にはダイヤモンドツール１１やカムの形状
が異なつて来るが、そのような事情については公
知であるから、詳細は省略する。 Furthermore, the above example is based on the case of performing centering and left and right chamfering; for example, when performing right-angle chamfering, the shape of the diamond tool 11 and cam will be different. Since the circumstances are well known, details will be omitted.
上記工程において、駆動軸８が20゜回転する迄
はダイヤモンドツール１１がレンズに全く接して
いないから、この間はレンズを極めて速く回転さ
せても差し支えない。また20゜から100゜までは芯
取のみが行なわれるから、この間のレンズの回転
速度は比較的速くてよい。さらに100゜から230゜ま
では有効径に直接隣接した部分の面取が行なわれ
るから、レンズの回転速度は比較的速くなければ
ならない。また280゜から340゜までは右面取が行な
われるからレンズの回転速度は比較的遅いのが望
ましい。340゜以後はダイヤモンドツール１１がレ
ンズから離れるだけであるからレンズの回転速度
は極めて速くてよい。 In the above process, the diamond tool 11 does not come into contact with the lens at all until the drive shaft 8 rotates 20 degrees, so the lens can be rotated extremely rapidly during this period. Further, since only centering is performed from 20° to 100°, the rotational speed of the lens during this period may be relatively fast. Furthermore, from 100° to 230°, the portion directly adjacent to the effective diameter is chamfered, so the rotation speed of the lens must be relatively fast. Also, since right-hand chamfering is performed from 280° to 340°, it is desirable that the rotation speed of the lens be relatively slow. After 340 degrees, the diamond tool 11 simply moves away from the lens, so the rotation speed of the lens can be extremely fast.
以上述べたことから明らかなように、例えば駆
動軸８の開始位置から20゜の位置、100゜の位置、
230゜の位置、280゜の位置、および340゜の位置に突
起部材を配してモーターM1の回転速度（したが
つてレンズの回転速度）を切り換えるようにすれ
ば、芯取工程のうちでレンズの回転速度を最も遅
くすべき工程（本例では左面取、直角面取がある
場合には直角面取）に合わせてレンズを回転させ
る必要がなくなるから、芯取工程（芯取および面
取）に必要な時間を大巾に短縮することができ
る。しかもダイヤモンドツールの回転速度をレン
ズの各回転速度に合わせて最適なものとすること
ができる。前記ダイヤモンドツールの回転速度は
そのダイヤモンドツールがレンズを研削している
ときにのみ問題となるから例えば340゜の位置では
モーターM2の速度を変える必要はない。 As is clear from the above, for example, at a position of 20° from the starting position of the drive shaft 8, a position of 100°,
By arranging protruding members at the 230°, 280°, and 340° positions to switch the rotational speed of the motor M1 (and therefore the rotational speed of the lens), the centering process can be Since there is no need to rotate the lens according to the process that requires the slowest lens rotation speed (in this example, left chamfering, or right-angle chamfering if there is a right-angle chamfer), the centering process (centering and chamfering) ) can significantly reduce the time required. Furthermore, the rotational speed of the diamond tool can be optimized to match each rotational speed of the lens. For example, at a position of 340°, there is no need to change the speed of the motor M2 , since the rotational speed of the diamond tool only matters when the diamond tool is grinding the lens.
なお、モーターM1の回転速度を変えれば、レ
ンズの回転速度だけでなく、両カム１２，１３の
回転速度およびダイヤモンドツール１１の移動速
度も変化するのは言う迄もない。 It goes without saying that if the rotational speed of the motor M1 is changed, not only the rotational speed of the lens but also the rotational speed of both cams 12 and 13 and the moving speed of the diamond tool 11 will be changed.
なお、各マイクロスイツチによつて選択される
動力電源系統のそれぞれにボリユームを設けてお
き、各マイクロスイツチによつて切り換えられる
モーターM1およびM2の回転速度を自由に調節で
きるようにするのが望ましい。またその際のレン
ズの回転速度やダイヤモンドツールの回転速度を
パネル上に表示するようにすると便利である。 Note that it is preferable to provide a volume for each of the power supply systems selected by each microswitch so that the rotational speeds of motors M1 and M2 switched by each microswitch can be freely adjusted. desirable. It would also be convenient to display the rotational speed of the lens and the diamond tool on the panel.
第１図は本発明の一実施例の芯取機の構造の概
略図、第２図は第１図の芯取機に使用される切込
カムと横送りカムのカム面の高さの展開図であ
る。
１……ベルレンズ軸、２……ワークレンズ軸、
５……レンズ、８……駆動軸、１１……ダイヤモ
ンドツール、１２……切込カム、１３……横送り
カム、１４，１５，１６……突起部材、１７，１
８，１９……マイクロスイツチ、M1，M2……モ
ーター。
Fig. 1 is a schematic diagram of the structure of a centering machine according to an embodiment of the present invention, and Fig. 2 is a development of the heights of the cam surfaces of the cutting cam and lateral feed cam used in the centering machine of Fig. 1. It is a diagram. 1...Bell lens axis, 2...Work lens axis,
5... Lens, 8... Drive shaft, 11... Diamond tool, 12... Cut cam, 13... Traverse feed cam, 14, 15, 16... Projection member, 17, 1
8, 19...Micro switch, M1 , M2 ...Motor.
Claims (1)
ーによつて回転せしめられる駆動軸、この駆動軸
が１回転する内に複数回回転するようにその駆動
軸に作用的に連結されたレンズ軸、このレンズ軸
に一体的に結合され、芯取すべきレンズをその光
軸が前記レンズ軸の回転軸と整列するように保持
するレンズホルダー、前記レンズの光軸にほぼ直
角な方向およびほぼ平行な方向に移動せしめら
れ、そのレンズの外縁や側面を切削する回転砥
石、その回転砥石を回転させる第２の電気モータ
ー、前記駆動軸にその駆動軸と一体に回転するよ
うに結合され、前記回転砥石の前記レンズの光軸
にほぼ直角な方向への移動を制御する切込カム、
および前記駆動軸にその駆動軸と一体に回転する
ように結合され、前記回転砥石の前記レンズの光
軸にほぼ平行な方向への移動を制御する横送りカ
ムからなり、前記駆動軸が１回転する間に前記レ
ンズの芯取が完了するようにしたレンズの芯取機
において、 芯取加工の各工程に対応する前記駆動軸の回転
角度を検出する角度検出手段と、この角度検出手
段によつて検出された前記駆動軸の回転角度に応
じて前記第１、第２の電気モーターの回転速度を
制御して芯取加工の各工程におけるレンズの回転
速度および前記回転砥石の移動速度を変更すると
ともに該回転砥石の回転速度を前記レンズの回転
速度に応じて変更する速度制御手段とを備えて成
ることを特徴とする芯取機。[Scope of Claims] 1: a first electric motor; a drive shaft rotated by the first electric motor; a coupled lens shaft, a lens holder integrally coupled to the lens shaft and holding the lens to be centered with its optical axis aligned with the rotational axis of the lens shaft, substantially perpendicular to the optical axis of the lens; a rotary grindstone that is moved in a direction substantially parallel to the lens to cut the outer edge or side surface of the lens; a second electric motor that rotates the rotary grindstone; and a second electric motor that rotates the drive shaft together with the drive shaft. a cutting cam coupled to the cutting cam for controlling movement of the rotary grindstone in a direction substantially perpendicular to the optical axis of the lens;
and a transverse feed cam coupled to the drive shaft so as to rotate together with the drive shaft, and controlling the movement of the rotary grindstone in a direction substantially parallel to the optical axis of the lens, and the drive shaft rotates once. In the lens centering machine, the centering of the lens is completed during the centering process, and an angle detection means for detecting a rotation angle of the drive shaft corresponding to each process of centering processing, and an angle detection means using the angle detection means. The rotational speeds of the first and second electric motors are controlled according to the rotational angle of the drive shaft detected during the centering process, thereby changing the rotational speed of the lens and the moving speed of the rotary grindstone in each step of centering processing. A centering machine characterized by comprising: a speed control means for changing the rotational speed of the rotary grindstone according to the rotational speed of the lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14389580A JPS5771768A (en) | 1980-10-15 | 1980-10-15 | Centering machine for lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14389580A JPS5771768A (en) | 1980-10-15 | 1980-10-15 | Centering machine for lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5771768A JPS5771768A (en) | 1982-05-04 |
| JPH0155945B2 true JPH0155945B2 (en) | 1989-11-28 |
Family
ID=15349539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14389580A Granted JPS5771768A (en) | 1980-10-15 | 1980-10-15 | Centering machine for lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5771768A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IE67140B1 (en) * | 1990-02-27 | 1996-03-06 | Bausch & Lomb | Lens edging system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421026A (en) * | 1977-07-19 | 1979-02-16 | Tadashi Fujii | Wipeefinished wall |
| JPS5430556A (en) * | 1977-08-10 | 1979-03-07 | Hitachi Ltd | Air conditioner for car |
-
1980
- 1980-10-15 JP JP14389580A patent/JPS5771768A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421026A (en) * | 1977-07-19 | 1979-02-16 | Tadashi Fujii | Wipeefinished wall |
| JPS5430556A (en) * | 1977-08-10 | 1979-03-07 | Hitachi Ltd | Air conditioner for car |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5771768A (en) | 1982-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4383393A (en) | Automatic lens grinding machine | |
| US5149337A (en) | Lens grinder and method of grinding lens | |
| US4864779A (en) | Grinding method and apparatus of orientation flat | |
| JPH07205001A (en) | Wafer chamfering machine | |
| US3816997A (en) | Apparatus for simultaneously performing rough and fine grinding operations | |
| JPH0155945B2 (en) | ||
| US4587765A (en) | Method of an apparatus for grinding work surface | |
| JPS6363342B2 (en) | ||
| JPS61192460A (en) | Grinding method for end face of optical connector core into convex spherical surface | |
| GB2116463A (en) | Process and apparatus for grinding the surface of a cam | |
| JP2957224B2 (en) | Chamfering mechanism for ball mill | |
| JPH02198757A (en) | Grinding method for lens | |
| EP1687118B1 (en) | Improvements in and relating to grinding machines | |
| US4271636A (en) | Lens generating apparatus | |
| JPH04141355A (en) | Grinding method | |
| JPS58155160A (en) | Projection type profiling cutter disc | |
| JPH06270049A (en) | Trimming device for illumination globe | |
| JP3452619B2 (en) | Spherical surface grinding method | |
| JPH07223118A (en) | Drum type worm shaft processing device | |
| JP2002144199A (en) | Surface grinding method and surface grinding machine for sheet disc-like workpiece | |
| JPH0123727Y2 (en) | ||
| JPH0239727Y2 (en) | ||
| JP2001157958A (en) | Lens aligning apparatus | |
| JPH07241919A (en) | Blade stage for cutting linear fresnel lens | |
| JPS6029274A (en) | Mechanism for relative adjustment between grinding wheel and copying wheel diameters in work profile shaping apparatus such as center setting apparatus |