JPH07241919A - Blade stage for cutting linear fresnel lens - Google Patents
Blade stage for cutting linear fresnel lensInfo
- Publication number
- JPH07241919A JPH07241919A JP6214994A JP6214994A JPH07241919A JP H07241919 A JPH07241919 A JP H07241919A JP 6214994 A JP6214994 A JP 6214994A JP 6214994 A JP6214994 A JP 6214994A JP H07241919 A JPH07241919 A JP H07241919A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- blade
- cutting blade
- fresnel lens
- lathe
- 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
Links
Landscapes
- Turning (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，リニアフレネルレンズ
の型（金型）を切削する際に使用する旋盤に設けられる
バイト（以下切削刃という）を固定するための切削用刃
物台に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool rest for fixing a cutting tool (hereinafter referred to as a cutting blade) provided on a lathe used for cutting a mold (mold) of a linear Fresnel lens.
【０００２】[0002]
【従来の技術】サーキュラーフレネルレンズ（同心円状
に分割されたレンズを持つ），リニアフレネルレンズ
は，その中心から外周にいくに従ってレンズ角度が変化
する（一般的にには大きくなる）ため，切削刃は，ワー
ク（被切削物）に対して，その径方向（リニアフレネル
レンズならばロ−ル状のワークの幅方向）に移動しなが
ら，その切削角度を変化させる必要がある。すなわち，
切削刃は，（Ａ）横送り，（ワークの径あるいは幅方向
の移動），（Ｂ）切り込み，ワークにに対して垂直に切
り込んでいき，所定の切削をした後，後退して切削刃を
抜く（フレネルレンズは一本ずつ溝を形成するので，一
本の溝を形成した後に，切削刃は，後退し，次いで横送
りされる），（Ｃ）円弧送りの動きをする。2. Description of the Related Art Circular Fresnel lenses (having lenses divided into concentric circles) and linear Fresnel lenses change the lens angle from the center to the outer periphery (generally increase) Needs to change the cutting angle while moving in the radial direction (the width direction of the roll-shaped work in the case of a linear Fresnel lens) with respect to the work (workpiece). That is,
The cutting blade is (A) lateral feed, (movement in the diameter or width direction of the work), (B) cutting, cutting perpendicular to the work, after performing predetermined cutting, retracting the cutting blade Pulling out (since the Fresnel lens forms one groove at a time, the cutting blade retreats and then traverses after forming one groove), and performs (C) circular arc feeding.
【０００３】ここで，「円弧送り」が切削角度の変化に
相当するが，サーキュラーフレネルレンズ型を切削する
場合には，図３に示すように，ワーク（円形でも角形で
もよい）を回転させながら，最外周部から中心まで切削
すれば，同心円状の型溝が全体に形成されることにな
り，切削角度の変化は，せいぜい０〜６０°程度で十分
である。しかしながら，リニアフレネルレンズを切削す
る場合には，図４に示すように，ワーク（切削の簡便さ
及びシート成形が連続的に行えるという利点からロ−ル
状のものが好ましい）の全幅にわたって型溝を切削する
必要があり，しかも，ワークの中心部では，切削刃が全
く逆方向に反転して切削角度を変化させる必要がある。Here, "arc feed" corresponds to a change in cutting angle, but when cutting a circular Fresnel lens type, as shown in FIG. 3, while rotating a work (whether circular or square). By cutting from the outermost periphery to the center, concentric die grooves are formed over the entire surface, and a change in cutting angle of about 0 to 60 ° is sufficient. However, when cutting a linear Fresnel lens, as shown in FIG. 4, the die groove is preferably spread over the entire width of the work (rolling is preferable because of the advantages of easy cutting and continuous sheet forming). In addition, it is necessary to change the cutting angle by reversing the cutting blade in the opposite direction at the center of the work.
【０００４】フレネルレンズは，動径（中心からの距
離）によってレンズ角度が変化するため，その金型を切
削する旋盤は，所定のプログラムによって刃先角度を変
化させることができなければならない。その際，切削刃
の回転移動は，切削刃の刃先の頂点を中心にして回転す
る必要があり，実際の切削の準備作業としては，虚空に
ある一点を中心にして回転する円弧送り台の，その回転
中心に切削刃の先端を一致させるように調整する必要が
ある。Since the lens angle of the Fresnel lens changes depending on the radius vector (distance from the center), the lathe for cutting the die must be able to change the cutting edge angle by a predetermined program. At that time, the rotational movement of the cutting blade needs to rotate around the apex of the cutting edge of the cutting blade. As a preparation work for actual cutting, the arc feed base that rotates around a point in the void is It is necessary to adjust the tip of the cutting blade to match the center of rotation.
【０００５】フレネルレンズの金型製造の関連技術とし
て，特開昭５２−４２４６号公報，特開昭５６−１７２
２９号公報，実開昭６０−１７２６０３号公報の提案の
発明がなされている。しかしながら，特開昭５２−４２
４６号公報，実開昭６０−１７２６０３号公報による方
法及びリニアフレネルレンズが切削対象物である特開昭
５６−１７２２９号公報による方法は，いずれも切削刃
として，左右非対称の異形切削刃を用いて，最大６０°
程度の限られた回転角度しか得られなかった。それ故
に，これらの方法を用いてリニアフレネルレンズ用ロ−
ル金型を切削する場合には，図６に示すように，向きの
異なる一対の左右非対象の異形切削刃を用意して，ロ−
ルの中心部を境に左半身と右半身とで別々の切削刃を交
換して使用しなければならないため，作業の連続性及び
多くの工程時間を要する等の問題があった。また，切削
刃交換に伴う切削刃の取り付け誤差のために，ロ−ル金
型の中心部に段差を生じ，このような金型を用いて得た
成形物（リニアフレネルレンズ）は，その中心部に段差
に起因する線が観察され，プロジェクションスクリーン
等の用途には適さないという問題があった。As a related technique for manufacturing a Fresnel lens mold, Japanese Patent Laid-Open Nos. 52-4246 and 56-172 are available.
The inventions proposed in Japanese Patent Publication No. 29 and Japanese Utility Model Publication No. 60-172603 have been made. However, JP-A-52-42
The method according to Japanese Patent Laid-Open No. 46, No. 60-172603, and the method according to Japanese Patent Laid-Open No. 56-17229 in which a linear Fresnel lens is an object to be cut use asymmetrically asymmetrical cutting blades as the cutting blades. Up to 60 °
Only a limited rotation angle was obtained. Therefore, these methods can be used for linear Fresnel lens rolls.
When cutting a die, as shown in Fig. 6, prepare a pair of left and right asymmetrical cutting blades with different orientations and roll it.
Since the left and right halves must use different cutting blades at the center of the tool, they have problems such as continuity of work and long process time. Also, due to the mounting error of the cutting blade due to the replacement of the cutting blade, a step is created in the center of the roll die, and the molded product (linear Fresnel lens) obtained using such a die is A line caused by a step was observed on the part, and there was a problem that it was not suitable for applications such as a projection screen.
【０００６】[0006]
【発明が解決しようとする課題】本発明は，上記のよう
なリニアフレネルレンズの金型製造工程の時間短縮化及
び簡略化を課題とする。具体的には，切削刃及び切削刃
を取り付ける刃物取付台が，刃先を中心として回転移動
し，中心部でレンズ角を反転させる必要のあるリニアフ
レネルを効率よく切削可能とするため，（１８０°−切
削刃の刃先角度）の有効な回転角を有する旋盤用刃物台
を提供することを課題とする。SUMMARY OF THE INVENTION An object of the present invention is to shorten the time and simplify the mold manufacturing process of the linear Fresnel lens as described above. Specifically, the cutting blade and the blade mount to which the cutting blade is attached rotate and move around the cutting edge to enable efficient cutting of the linear Fresnel that requires reversing the lens angle at the center (180 ° -An object is to provide a tool post for a lathe having an effective rotation angle of the cutting edge angle).
【０００７】[0007]
【課題を解決するための手段】本発明の手段は，ロ−ル
状被切削体１の軸方向及びそれに垂直方向に移動可能な
旋盤の送り台４上に回転自在に取り付けられた刃物取付
台１２と刃物取付台１２の回転角度を制御する装置とか
らなる旋盤であって，切削刃３は，刃の形が左右対称で
あり，刃先が刃物取付台１２の回転中心に位置するよう
取り付けられ，刃物取付台１２は，切削刃３の刃先角よ
り小さな角度範囲に存在し，かつ，ロ−ル状被切削体１
よりも下方に配置された，数値制御装置により回転する
回転円卓５上に取り付けられていることを特徴とするリ
ニアフレネルレンズ切削用刃物台である。The means of the present invention is a tool mount rotatably mounted on a feed table 4 of a lathe which is movable in the axial direction of the roll-shaped workpiece 1 and in the direction perpendicular thereto. 12 and a device for controlling the rotation angle of the tool mount 12, wherein the cutting blade 3 has a symmetrical blade shape and is mounted so that the cutting edge is located at the center of rotation of the tool mount 12. The tool mount 12 exists in an angle range smaller than the cutting edge angle of the cutting blade 3, and the roll-shaped workpiece 1
It is a tool post for cutting a linear Fresnel lens, characterized in that it is mounted on a rotary disc 5 which is arranged below and is rotated by a numerical control device.
【０００８】上記課題を解決するために，刃物取付台１
２に要求されることは，刃物取付台１２から外れた点を
中心として回転移動する刃物取付台１２に切削刃３を取
り付け，この際に，（１８０°−刃先角度）の有効な回
転角度が得られるようにすることである。さらに，この
切削刃３は刃先の両側で切削する必要があるため左右対
称な形をしている必要がある。また，切削刃３が配置さ
れた刃物取付台１２は，切削時に金型を傷つけないため
に刃先角の延長線より内側にのみ存在される必要があ
る。また，上記の刃物取付台１２は，ロ−ル状被切削体
１よりも下方に，ＮＣ等の数値制御装置により自在に回
転する円卓上に設けられる。In order to solve the above problems, the blade mount 1
2 is required to attach the cutting blade 3 to the tool mount 12 that rotates around a point deviated from the tool mount 12, and at this time, the effective rotation angle of (180 ° -blade angle) To get it. Furthermore, since the cutting blade 3 needs to be cut on both sides of the cutting edge, it needs to have a symmetrical shape. Further, the tool mount 12 on which the cutting blade 3 is arranged needs to be present only inside the extension line of the cutting edge angle so as not to damage the die during cutting. Further, the blade mounting base 12 is provided below the roll-shaped body 1 to be cut on a circular table which can be freely rotated by a numerical controller such as NC.
【０００９】[0009]
【実施例】以下，本発明を図を参照しながら説明する。
図１は，本発明によるリニアフレネルレンズ切削用刃物
台の概念を示す平面図であり，図２は，図１の一部を切
欠して示す側面図である。刃物台は旋盤の送り台４の上
に水平移動可能に設置され，。また，刃物台は，ＮＣ等
の数値制御装置により回転する円卓駆動モーター９によ
り円卓駆動ギア８を介して自在に回転する回転円卓５を
有しており，この回転円卓５は，ロ−ル状被切削体１よ
りも下方に設ける。回転円卓５は円卓の回転ガイド７に
ガイドされて回転する。回転円卓５上に設置された刃物
取付台１２上の切削刃ホールダー１０は，切削刃３用の
天地方向及び左右方向のそれぞれの切削刃固定ねじ１
１，１１を有しており，回転円卓５の回転中心に刃先が
合うように切削刃３を固定し得る。ここで，刃物取付台
１２は切削刃３の先端角の延長線よりも内側に存在して
設けられている。The present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing the concept of a tool post for cutting a linear Fresnel lens according to the present invention, and FIG. 2 is a side view showing a part of FIG. The tool rest is installed on the feed stand 4 of the lathe so that it can move horizontally. Further, the turret has a rotary disc 5 which is freely rotated by a disc drive motor 9 which is rotated by a numerical control device such as NC via a disc drive gear 8. The rotary disc 5 is a roll-shaped disc. It is provided below the body to be cut 1. The rotary disc 5 is rotated by being guided by a rotary guide 7 of the disc. The cutting blade holder 10 on the blade mount 12 installed on the rotary disc 5 is provided with the cutting blade fixing screws 1 for the cutting blade 3 in the vertical direction and the horizontal direction.
1 and 11, the cutting blade 3 can be fixed so that the cutting edge fits the center of rotation of the rotary disc 5. Here, the tool mount 12 is provided inside the extension line of the tip angle of the cutting blade 3.
【００１０】作動にあたっては，まず，旋盤の送り台４
をロ−ル状被切削体１の端部所定位置に移動し，図示し
ない数値制御装置により回転する回転円卓５により角度
設定し，刃物取付台１２の切削刃ホールダー１０に，切
削刃固定ねじ１１，１１で回転円卓５の回転中心に切削
刃３の刃先が合うよう固定する。ついで，図示しない数
値制御装置により，旋盤の送り台４を移動して型溝の切
り込み及び後退を行い，引き続いて，つぎの型溝へ旋盤
の送り台４を移動して，上記と同様な切削刃３の角度設
定と切り込み，後退，つぎの型溝へと旋盤の送り台４の
移動を繰り返す。ロ−ル状被切削体１の中心位置におい
ては，上記の角度設定にあたり，（１８０°−切削刃の
角度）の有効回転角度を有する回転円卓５を回転して反
転した角度設定を行い，さらに，引き続いて，ロ−ル状
被切削体１の反対側の端部所定位置まで，中心位置と対
称に作業を行うことによりリニアフレネルレンズの金型
を得ることができる。図５に，本発明の実施例における
切削刃３の切削角度の変化の状態を概念的に示す。In operation, first, the feed table 4 of the lathe
Is moved to a predetermined position on the end of the roll-shaped body to be cut 1 and an angle is set by a rotary disc 5 which is rotated by a numerical control device (not shown). The cutting blade holder 10 of the tool mount 12 is provided with a cutting blade fixing screw 11 , 11 are fixed so that the cutting edge of the cutting blade 3 is aligned with the center of rotation of the rotary disc 5. Then, by using a numerical control device (not shown), the feed table 4 of the lathe is moved to cut and retreat the die groove, and subsequently, the feed table 4 of the lathe is moved to the next die groove to perform the same cutting as above. The angle setting of the blade 3, the cutting, the retreat, and the movement of the feed table 4 of the lathe to the next die groove are repeated. At the center position of the roll-shaped body to be cut 1, in setting the above-mentioned angle, the rotary disc 5 having an effective rotation angle of (180 ° −the angle of the cutting blade) is rotated and inverted, and further, the angle is set. Then, the die of the linear Fresnel lens can be obtained by performing the work symmetrically with the center position up to a predetermined position on the opposite end of the roll-shaped body 1 to be cut. FIG. 5 conceptually shows the state of change in the cutting angle of the cutting blade 3 in the embodiment of the present invention.
【００１１】[0011]
【発明の効果】本発明によれば，中心位置で切削刃を取
り外し，刃の向きが逆方向のもうひとつの切削刃に交換
する工程を排除し，切削刃の両側で切削しても刃物取付
台がロ−ル状被切削体に接触することもなく，リニアフ
レネルレンズの金型切削時間を短縮し，工程を簡略化で
きる。According to the present invention, the step of removing the cutting blade at the center position and replacing it with another cutting blade having the opposite direction is eliminated, and the cutting tool is attached even if cutting is performed on both sides of the cutting blade. The stage does not come into contact with the roll-shaped object to be cut, and the die cutting time of the linear Fresnel lens can be shortened, and the process can be simplified.
【図１】本発明のリニアフレネルレンズ切削用刃物台を
説明する概略平面図である。FIG. 1 is a schematic plan view illustrating a tool post for cutting a linear Fresnel lens of the present invention.
【図２】図１の一部切欠側面図である。FIG. 2 is a partially cutaway side view of FIG.
【図３】サーキュラーフレネルの金型切削を説明する概
念図である。FIG. 3 is a conceptual diagram for explaining die cutting of a circular Fresnel.
【図４】リニアフレネルの金型切削を説明する概念図で
ある。FIG. 4 is a conceptual diagram for explaining die cutting of a linear Fresnel.
【図５】本発明の実施例における切削刃の切削角度の変
化の状態を示す概念図である。FIG. 5 is a conceptual diagram showing a state of change in the cutting angle of the cutting blade in the embodiment of the present invention.
【図６】従来方式の切削刃の切削角度の変化の状態を示
す概念図である。FIG. 6 is a conceptual diagram showing a state in which a cutting angle of a conventional cutting blade changes.
１ ロ−ル状被切削体 ２ ロ−ルの回転軸 ３ 切削刃 ４ 旋盤の送り台 ５ 回転円卓 ６ 円卓の回転軸 ７ 円卓の回転ガイド ８ 円卓駆動ギア ９ 円卓駆動モーター １０ 切削刃ホールダー １１ 切削刃固定ねじ １２ 切削刃固定台 1 Roll-shaped object to be cut 2 Roll rotary shaft 3 Cutting blade 4 Lathe feed table 5 Rotating round table 6 Rotating shaft of round table 7 Rotating guide of round table 8 Round table driving gear 9 Round table driving motor 10 Cutting blade holder 11 Cutting Blade fixing screw 12 Cutting blade fixing base
Claims (1)
れに垂直方向に移動可能な旋盤の送り台（４）上に回転
自在に取り付けられた刃物取付台（１２）と刃物取付台
（１２）の回転角度を制御する装置とからなる旋盤であ
って，切削刃（３）は，刃の形が左右対称であり，刃先
が刃物取付台（１２）の回転中心に位置するよう取り付
けられ，刃物取付台（１２）は，切削刃（３）の刃先角
より小さな角度範囲に存在し，かつ，ロ−ル状被切削体
（１）よりも下方に配置された，数値制御装置により回
転する回転円卓（５）上に取り付けられていることを特
徴とするリニアフレネルレンズ切削用刃物台。1. A tool mount (12) and a tool mount which are rotatably mounted on a feed table (4) of a lathe which is movable in the axial direction of the roll-shaped workpiece (1) and in a direction perpendicular thereto. A lathe comprising a device for controlling the rotation angle of a table (12), wherein the cutting blade (3) has a symmetrical blade shape, and the cutting edge is positioned at the center of rotation of the tool mount (12). A numerical control device which is attached, the tool mount (12) is present in an angle range smaller than the cutting edge angle of the cutting blade (3), and is arranged below the roll-shaped workpiece (1). A tool post for cutting a linear Fresnel lens, which is mounted on a rotating round table (5) which is rotated by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6214994A JPH07241919A (en) | 1994-03-08 | 1994-03-08 | Blade stage for cutting linear fresnel lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6214994A JPH07241919A (en) | 1994-03-08 | 1994-03-08 | Blade stage for cutting linear fresnel lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07241919A true JPH07241919A (en) | 1995-09-19 |
Family
ID=13191764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6214994A Pending JPH07241919A (en) | 1994-03-08 | 1994-03-08 | Blade stage for cutting linear fresnel lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07241919A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011167816A (en) * | 2010-02-19 | 2011-09-01 | Denso Corp | Cutting tool for cutting, cutting machine, method of manufacturing linear fresnel lens, and method of manufacturing die of the linear fresnel lens |
| FR2980276A1 (en) * | 2011-09-20 | 2013-03-22 | Essilor Int | LENS WITH SEVERAL ZONE SURFACES |
| CN105014944A (en) * | 2014-04-17 | 2015-11-04 | 深圳市绎立锐光科技开发有限公司 | Device for manufacturing Fresnel lens and method thereof |
-
1994
- 1994-03-08 JP JP6214994A patent/JPH07241919A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011167816A (en) * | 2010-02-19 | 2011-09-01 | Denso Corp | Cutting tool for cutting, cutting machine, method of manufacturing linear fresnel lens, and method of manufacturing die of the linear fresnel lens |
| FR2980276A1 (en) * | 2011-09-20 | 2013-03-22 | Essilor Int | LENS WITH SEVERAL ZONE SURFACES |
| WO2013041791A1 (en) * | 2011-09-20 | 2013-03-28 | Essilor International (Compagnie Generale D'optique) | Lens having a plurality of surfaces with zones |
| US9164201B2 (en) | 2011-09-20 | 2015-10-20 | Essilor International (Compagnie Generale D'optique | Lens having a plurality of surfaces with zones |
| CN105014944A (en) * | 2014-04-17 | 2015-11-04 | 深圳市绎立锐光科技开发有限公司 | Device for manufacturing Fresnel lens and method thereof |
| CN105014944B (en) * | 2014-04-17 | 2017-08-29 | 深圳市绎立锐光科技开发有限公司 | A kind of device and method for being used to manufacture Fresnel lenses |
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