JP3078404B2 - Electrolytic dressing grinding method - Google Patents
Electrolytic dressing grinding methodInfo
- Publication number
- JP3078404B2 JP3078404B2 JP04179157A JP17915792A JP3078404B2 JP 3078404 B2 JP3078404 B2 JP 3078404B2 JP 04179157 A JP04179157 A JP 04179157A JP 17915792 A JP17915792 A JP 17915792A JP 3078404 B2 JP3078404 B2 JP 3078404B2
- Authority
- JP
- Japan
- Prior art keywords
- grindstone
- processing
- grinding
- conductive
- work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラスセラミックス等
の高脆材料を研削加工する電解インプロセスドレッシン
グ研削方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic in-process dressing grinding method for grinding highly brittle materials such as glass ceramics.
【０００２】[0002]
【従来の技術】従来、光学素材等の被加工物を研削加工
する球面創成加工法としては、加工技術データファイル
（１９８２年機械振興協会より刊行）に提案されたＣＧ
（カーブジェネレータ）による球面創成加工方法があ
る。2. Description of the Related Art Conventionally, as a spherical surface forming method for grinding a workpiece such as an optical material, a CG proposed in a processing technology data file (published by the Machine Promotion Association in 1982) has been proposed.
(Curve Generator) There is a method for creating a spherical surface.
【０００３】上記提案技術を図１０にて説明する。図１
０は球面研削機械の要部を示す。図１０に示す様に、回
転自在に構成されたチャック７１に装着されているワー
ク７２の軸心７３に対して、スイベル角αに配設したカ
ップ形状の砥石７４が回転軸心７５にて回転自在に保持
されている。砥石７４の加工面７６は、ワーク７２の研
削仕上げ面の曲率ＲＡと同一曲率形状に形成されてい
る。上記構成による加工方法は、チャック７１と砥石７
４とを回動し、加工面７６をワーク７２に当接して研削
加工を行う。[0003] The above proposed technique will be described with reference to FIG. FIG.
0 indicates a main part of the spherical grinding machine. As shown in FIG. 10, a cup-shaped grindstone 74 arranged at a swivel angle α rotates around a rotation axis 75 with respect to an axis 73 of a work 72 mounted on a rotatable chuck 71. It is freely held. The processing surface 76 of the grindstone 74 is formed to have the same curvature as the curvature RA of the finished surface of the workpiece 72. The processing method according to the above configuration includes the chuck 71 and the grindstone 7.
4 and a grinding process is performed by bringing the processing surface 76 into contact with the workpiece 72.
【０００４】また、図１１〜図１３に示す様に、一般に
ＣＧ加工における初期製造後の砥石８１の加工面８２
は、曲率をＲＡに精密に創成された球面ラップ工具８３
に対して、砥石８１の加工面８２を加圧揺動するととも
に、遊離砥粒８４を供給しながらラッピング加工を行う
ことにより、曲率ＲＡの加工面８５に創成される。[0004] As shown in FIGS. 11 to 13, generally, a processing surface 82 of a grindstone 81 after initial production in CG processing is generally used.
Is a spherical wrap tool 83 whose curvature is precisely created in RA
On the other hand, the processing surface 82 of the grindstone 81 is pressurized and oscillated, and lapping is performed while supplying the free abrasive grains 84, thereby creating a processing surface 85 having a curvature RA.
【０００５】さらに、高強度の導電性メタルボンド砥石
を用いる光学素材の球面創成加工に対して電解インプロ
セスドレッシング研削法を適用した例としては、例えば
特開平３−６０９７３号公報記載の発明がある。図１４
は上記発明における研削装置の主要部を示したものであ
る。図１４に示す様に、電源装置９１の（＋）極はブラ
シ９２を介して導電性砥石９３の外周部に電気的に接続
され、（−）極は研削仕上げ面の曲率ＲＡと近似形状に
形成され、導電性砥石９３の加工面９４との間に僅かな
隙間ｌを設けて配設されるドレス電極９５と接続されて
いる。また、上記導電性砥石９３の加工面９４とドレス
電極９５との隙間に図示されていないクーラント供給装
置により、弱電性クーラント９６を供給するノズル９７
が配設されている。Further, as an example of applying an electrolytic in-process dressing grinding method to a spherical surface forming process of an optical material using a high-strength conductive metal bond grindstone, there is an invention described in, for example, JP-A-3-60973. . FIG.
Shows a main part of the grinding apparatus in the above invention. As shown in FIG. 14, the (+) pole of the power supply device 91 is electrically connected to the outer peripheral portion of the conductive grindstone 93 via the brush 92, and the (-) pole has a shape approximate to the curvature RA of the ground surface. It is formed and is connected to a dress electrode 95 provided with a slight gap 1 between it and the processing surface 94 of the conductive grindstone 93. A nozzle 97 for supplying a weakly electric coolant 96 by a coolant supply device (not shown) in a gap between the processing surface 94 of the conductive grindstone 93 and the dress electrode 95.
Are arranged.
【０００６】上記構成による加工方法は、チャック９８
と導電性砥石９３とを回動し、加工面９４をワーク９９
に当接して研削加工を行う。この際、弱電性クーラント
９６を供給しながら、ドレス電極９５とブラシ９２とに
電源装置９１によって電圧を印加する。これによって、
加工面９４が加工中に常時電解ドレッシングされて常に
安定した加工が行える。[0006] The processing method according to the above-described configuration is based on the chuck 98.
And the conductive grindstone 93 are rotated, and the processing surface 94 is
To perform grinding. At this time, a voltage is applied to the dress electrode 95 and the brush 92 by the power supply device 91 while supplying the weakly electric coolant 96. by this,
The processing surface 94 is always electrolytically dressed during processing, so that stable processing can always be performed.
【０００７】[0007]
【発明が解決しようとする課題】しかるに、前記各従来
技術においては、以下の様な問題がある。すなわち、Ｃ
Ｇによる球面創成加工方法においては、初期製造後の砥
石のラッピング加工作業は手作業により行われることが
普通であるため、曲率ＲＡを砥石の加工面に精密に創成
することが困難であり、研削装置へ砥石を装着した際
に、研削装置の砥石軸の回転中心に対して砥石の加工面
形状の中心は偏心（シフトおよびチルト）している。However, each of the above-mentioned prior arts has the following problems. That is, C
In the method of forming a spherical surface by G, since the lapping work of the grindstone after the initial production is usually performed manually, it is difficult to precisely create the curvature RA on the work surface of the grindstone. When the grindstone is mounted on the apparatus, the center of the processing surface shape of the grindstone is eccentric (shift and tilt) with respect to the rotation center of the grindstone shaft of the grinding apparatus.
【０００８】従って、従来のＣＧ加工の加工初期におい
ては砥石加工面の偏心により、砥石の加工面全面がワー
クの被加工面に当接しないことがあった。従来、ＣＧ加
工においては、砥石の加工面全面がワークの被加工面に
当接しなくても、球面創成加工を行うことが可能なた
め、低速で球面創成加工を行うことにより、砥石をツル
ーイングしていた。Therefore, in the initial stage of the conventional CG processing, the entire processing surface of the grindstone may not come into contact with the work surface of the work due to the eccentricity of the grinding wheel processing surface. Conventionally, in the CG processing, since the spherical surface generation processing can be performed even when the entire processing surface of the grinding wheel does not abut on the work surface of the workpiece, the grinding wheel is trued by performing the spherical surface generation processing at a low speed. I was
【０００９】以下にこのツルーイングの方法を説明す
る。まず、ワークに対して低速で球面創成加工を行うこ
とにより砥石の加工面を消耗させる。この球面創成加工
を数個のワークに対して行う。そして、ワークの被加工
面に対して砥石の加工面を除々に倣わせて前記偏心を除
去し、砥石の加工面全面をワークの被加工面に当接させ
てツルーイングを終了する。ツルーイングが終了した
ら、所定の加工速度にて通常の曲面創成加工を行う。こ
こで、砥石の偏心が除去される（ツルーイングが終了す
る）までに曲面創成加工を行ったワークは、製品として
十分に利用可能なものである。The truing method will be described below. First, the work surface of the grindstone is consumed by performing a spherical surface forming process on the work at a low speed. This spherical surface creation processing is performed on several works. Then, the eccentricity is removed by gradually aligning the processing surface of the grindstone with the processing surface of the work, and the entire processing surface of the grinding stone is brought into contact with the processing surface of the work to complete the truing. After the truing is completed, a normal curved surface forming process is performed at a predetermined processing speed. Here, the workpiece on which the curved surface creation processing has been performed until the eccentricity of the grindstone is removed (the truing is completed) is sufficiently usable as a product.
【００１０】上記ツルーイング方法によると、球面創成
加工の初期（ツルーイング開始直後）においては、砥石
のツルーイングが完全でないため、ワークに対して安定
した加工が行えず、また、砥石の加工面とワークの被加
工面との接触面積は小さいために加工効率が悪く、ワー
クの被加工面に対して砥石の加工面を倣わせる（ツルー
イングする）のに時間がかかった。According to the truing method described above, in the initial stage of the spherical surface forming process (immediately after the start of truing), since the truing of the grindstone is not complete, stable processing cannot be performed on the work, and the work surface of the grindstone and the work between the work surface of the grindstone and the work are difficult. Since the contact area with the work surface is small, the processing efficiency is poor, and it takes time to imitate (truing) the work surface of the grindstone with the work surface of the work.
【００１１】また、特開平３−６０９７３号公報記載の
電解インプロセスドレッシング研削法による球面創成加
工においても、加工初期においては導電性砥石のツルー
イングができておらず、安定した加工が行えないという
不具合があった。Also, in the spherical surface forming processing by the electrolytic in-process dressing grinding method described in JP-A-3-60973, the truing of the conductive grindstone is not performed in the initial stage of processing, and stable processing cannot be performed. was there.
【００１２】これらの不具合は多種少量生産に対応する
ために、加工製品の切り替えのたびに砥石の交換が行わ
れ、また高精度の球面創成加工を行うために、できるだ
け磨耗しにくい高強度ボンド砥石を用いる今日の生産現
場においては、ツルーイングに要する時間が長く、大き
な問題となる。In order to cope with these kinds of inconveniences in small-lot production, the whetstone is replaced every time the processed product is changed, and a high-strength bond whetstone which is as hard to wear as possible to perform high-precision sphere generation processing. In today's production sites that use truing, truing takes a long time, which is a major problem.
【００１３】因って、本発明は前記各従来技術における
問題点に鑑みて開発されたもので、加工機に砥石を装着
したのち、砥石のツルーイングを短時間で行うことによ
って、精度のよい光学素子を安定して連続的に得ること
のできる電解ドレッシング研削方法の提供を目的とす
る。Accordingly, the present invention has been developed in view of the problems in the above-described prior arts. After mounting a grindstone on a processing machine, the truing of the grindstone is performed in a short time, so that a high-precision optical system is obtained. An object of the present invention is to provide an electrolytic dressing grinding method capable of stably and continuously obtaining elements.
【００１４】[0014]
【課題を解決するための手段および作用】本発明は、電
解ドレッシング研削方法において、導電性砥石によるワ
ークに対する加工初期に電解電流値を大きくして導電性
砥石をツルーイングし、ツルーイング終了後は通常の電
解電流値によって加工を行う方法である。SUMMARY OF THE INVENTION The present invention relates to an electrolytic dressing grinding method, in which a conductive grindstone is trued by increasing an electrolytic current value at the initial stage of processing a workpiece with a conductive grindstone, and after the truing is completed, a normal grindstone is formed. This is a method of performing processing by an electrolytic current value.
【００１５】図１に本発明を達成するための装置の概念
図を示し。図２〜図７にその加工方法を適用した場合の
各工程におけるグラフと砥石加工面の状態の概念図とを
示す。図１に示す様に、電源装置１５の（＋）極はブラ
シ１を介して導電性砥石２に接続され、（−）極は導電
性砥石２の加工面３との間に僅かな隙間ｌを設けたドレ
ス電極４に電気的に接続されている。また、上記導電性
砥石２の加工面３とドレス電極４との隙間に、弱電性ク
ーラント５が供給され、電解インプロセスドレッシング
研削法が行える構成となっている。FIG. 1 shows a conceptual diagram of an apparatus for achieving the present invention. FIGS. 2 to 7 show graphs and conceptual diagrams of the state of the grinding wheel processing surface in each step when the processing method is applied. As shown in FIG. 1, the (+) pole of the power supply device 15 is connected to the conductive grindstone 2 via the brush 1, and the (−) pole is a small gap l between the conductive grindstone 2 and the processing surface 3. Is electrically connected to the dress electrode 4 provided with Further, a weakly electric coolant 5 is supplied to a gap between the processing surface 3 of the conductive grindstone 2 and the dress electrode 4 so that the electrolytic in-process dressing grinding method can be performed.
【００１６】上記構成において、導電性砥石２を研削装
置本体（図示省略）に装着後、弱電性クーラント５を供
給しながら導電性砥石２を回動する。この時、通常の電
解インプセスドレッシング研削時よりドレス電流値を大
きくしながら、加工面３をワーク１６に当接して低速切
り込み速度による加工を所定量行う。その後、通常ドレ
ス電流値・通常加工速度で球面創成加工を行う。In the above configuration, after the conductive grindstone 2 is mounted on the grinding device main body (not shown), the conductive grindstone 2 is rotated while supplying the weakly conductive coolant 5. At this time, the processing surface 3 is brought into contact with the work 16 while a predetermined amount of processing is performed at a low cutting speed while the dress current value is made larger than that during normal electrolytic incession dressing grinding. After that, the sphere forming process is performed at the normal dress current value and the normal processing speed.
【００１７】本発明の特徴は、電解ドレッシング研削方
法において、導電性砥石によるワークに対する加工初期
に電解電流値を大きくして導電性砥石をツルーイング
し、ツルーイング終了後は通常の電解電流値によって加
工を行うことである。A feature of the present invention is that, in the electrolytic dressing grinding method, the electrolysis current value is increased at the initial stage of processing of the workpiece with the conductive grindstone, and the conductive grindstone is trued. Is to do.
【００１８】通常、電解ドレッシング研削加工を行う
と、導電性砥石を構成するボンド材の酸化膜が導電性砥
石加工面に生成される。この酸化膜は、研削加工による
研削抵抗によって除去される。酸化膜の除去に伴って導
電性砥石のボンド材の電解溶出が進行して砥石の目立て
をし、砥石の加工面は常にワークを加工するのに最適な
状態を維持することが可能である。Normally, when the electrolytic dressing grinding is performed, an oxide film of a bond material constituting the conductive grindstone is formed on the conductive grindstone processed surface. This oxide film is removed by grinding resistance due to grinding. With the removal of the oxide film, electrolytic elution of the bonding material of the conductive grindstone progresses to sharpen the grindstone, and the processing surface of the grindstone can always maintain an optimal state for processing the work.
【００１９】本発明では、この電解ドレッシング研削に
おいて、ドレス電極に印加する電流を、通常の電解ドレ
ッシング研削時の電流値に比べて大きくすることによっ
て、酸化膜の生成速度を早め、導電性砥石の形状を早く
ワークの非加工面に倣わせ、ツルーイングするものであ
る。以下、図を用いてその電解ドレッシング研削方法を
説明する。According to the present invention, in this electrolytic dressing grinding, the current applied to the dress electrode is made larger than the current value at the time of ordinary electrolytic dressing grinding, so that the generation speed of the oxide film is increased and the conductive grinding wheel is formed. The truing is performed by quickly conforming the shape to the non-machined surface of the work. Hereinafter, the electrolytic dressing grinding method will be described with reference to the drawings.
【００２０】図２は研削装置に導電性砥石を装着した直
後の回転による砥石の振れ、図３はツルーイング終了後
の回転による砥石の振れ、図４は通常の電解インプロセ
スドレッシング研削工程中の回転による砥石の振れを示
すグラフである。図５は研削装置に導電性砥石を装着し
た直後の砥石の加工面の状態、図６はツルーイング終了
後の砥石の加工面の状態、図７は通常の電解インプロセ
スドレッシング研削工程中の砥石の加工面の状態を示す
概念図である。FIG. 2 shows the wobble of the grinding wheel due to the rotation immediately after the conductive whetstone is mounted on the grinding device, FIG. 3 shows the wobble of the whetstone due to the rotation after the completion of truing, and FIG. 4 shows the rotation during the usual electrolytic in-process dressing grinding process. 6 is a graph showing the wobble of a whetstone caused by the above. Fig. 5 shows the state of the processing surface of the grinding wheel immediately after the conductive grinding wheel is mounted on the grinding device, Fig. 6 shows the state of the processing surface of the grinding wheel after truing is completed, and Fig. 7 shows the state of the grinding wheel during a normal electrolytic in-process dressing grinding process. It is a conceptual diagram which shows the state of a processing surface.
【００２１】球面加工装置にワークおよび導電性砥石を
装着して回転する。このとき、導電性砥石の回転軸の回
転中心と、導電性砥石の加工面の形状の中心とが偏心し
ている場合、図２に図示の如く、砥石には回転によって
振れが生じてしまう。また、図５に図示の如く、このと
きの導電性砥石の加工面はまだ新品の導電性砥石である
ため、加工面に砥粒が突き出ていない。A work and a conductive grindstone are mounted on a spherical machining apparatus and rotated. At this time, when the rotation center of the rotating shaft of the conductive grindstone and the center of the shape of the processing surface of the conductive grindstone are eccentric, the rotation of the grindstone is caused by rotation as shown in FIG. In addition, as shown in FIG. 5, since the processed surface of the conductive grindstone at this time is a new conductive grindstone, no abrasive grains protrude from the processed surface.
【００２２】次に、ワークと導電性砥石との間に弱電性
のクーラントを供給し、ドレス電極にてドレス電流を印
加して導電性砥石を電解ドレスすることにより、導電性
砥石の表面に砥粒を突出させる。ここで印加する電流
は、通常の電解ドレッシングに比べて大きな電流であ
る。Next, a weakly conductive coolant is supplied between the workpiece and the conductive grindstone, and a dress current is applied by a dress electrode to electrolytically dress the conductive grindstone. Make the grains protrude. The current applied here is a large current as compared with normal electrolytic dressing.
【００２３】導電性砥石表面に砥粒が突出したら、導電
性砥石をワークに対して切り込み、電解ドレッシング研
削を行う。このときのドレス電流値も、電解ドレッシン
グ時と同様に通常の電解ドレッシング研削に比べて大き
な電流のままである。このような、大きな電解電流によ
る電解ドレッシング研削を導電性砥石のツルーイングと
し、数個のワークに対して行う。導電性砥石のツルーイ
ングは、砥石の加工面がワークの被加工面に倣った時点
で終了とする。When the abrasive grains protrude from the surface of the conductive grindstone, the conductive grindstone is cut into the work and electrolytic dressing grinding is performed. At this time, the dress current value is still larger than that in the ordinary electrolytic dressing grinding, as in the electrolytic dressing. Such electrolytic dressing grinding with a large electrolytic current is used as truing of a conductive grindstone, and is performed on several works. The truing of the conductive grindstone ends when the machined surface of the grindstone follows the work surface of the workpiece.
【００２４】砥石の加工面がワークの被加工面に倣う
と、砥石の回転軸と砥石加工面の形状の中心とが一致
し、図３に図示の如く、回転による砥石の振れはなくな
る。また、ツルーイング終了後は図６に図示の如く、砥
石の加工面には酸化膜が生成され、砥粒は十分な研削能
力を有した状態で砥石の加工面に突出している。When the work surface of the grindstone follows the work surface of the work, the rotation axis of the grindstone coincides with the center of the shape of the grindstone work surface, and as shown in FIG. 3, the wobble of the grindstone due to rotation is eliminated. After the truing is completed, as shown in FIG. 6, an oxide film is generated on the processing surface of the grindstone, and the abrasive grains protrude from the processing surface of the grindstone with sufficient grinding ability.
【００２５】ツルーイングが終了したら、以後、通常の
電解ドレッシング研削と同様の電解電流値にて、多数の
ワークの加工を行う。通常の電解ドレッシング研削中
は、図４および図７に図示の如く、回転による砥石の振
れがなく、加工面表面には、加工能力を十分に有してい
る砥粒が突出しており、安定した加工が行える。After the truing is completed, a large number of workpieces are machined with the same electrolytic current value as in ordinary electrolytic dressing grinding. During normal electrolytic dressing grinding, as shown in FIGS. 4 and 7, there is no wobble of the grindstone due to rotation, and abrasive grains having sufficient machining ability protrude from the surface of the machined surface. Processing can be performed.
【００２６】[0026]
【実施例１】図８は本実施例で用いる装置を示す概略構
成図である。導電性砥石６の加工面７は、ダイヤモンド
粉末などの砥粒と、Ｃｕ，ＳｎおよびＦｅ等の金属粉末
とを特殊配合し、熱処理した焼結合金により構成されて
いる。また、上記装置外に設けた電源装置８の（＋）極
はブラシ９を介して導電性砥石６の外周部へ電気的に接
続され、（−）極は曲率ＲＡと近似形状に形成されて導
電性砥石６の加工面７との間に僅かな隙間ｌを設けて配
設されるドレス電極１０と接続されている。また、上記
導電性砥石６の加工面７とドレス電極１０との隙間に、
図示されていないクーラント供給装置により、弱電性ク
ーラント１１を供給するノズル１２が配設されている。Embodiment 1 FIG. 8 is a schematic structural view showing an apparatus used in the present embodiment. The processing surface 7 of the conductive grindstone 6 is made of a sintered alloy that is specially blended with abrasive grains such as diamond powder and metal powders such as Cu, Sn and Fe and heat-treated. Further, the (+) pole of the power supply device 8 provided outside the device is electrically connected to the outer peripheral portion of the conductive grindstone 6 via the brush 9, and the (-) pole is formed in a shape approximate to the curvature RA. It is connected to a dress electrode 10 provided with a slight gap 1 between itself and the processing surface 7 of the conductive grindstone 6. Further, in the gap between the processing surface 7 of the conductive grinding stone 6 and the dress electrode 10,
A nozzle 12 for supplying a weakly electric coolant 11 is provided by a coolant supply device (not shown).
【００２７】上記加工装置による加工方法を以下に説明
する。ワーク１４および導電性砥石６を研削装置に装着
して導電性砥石６を回転させ、この導電性砥石６とドレ
ス電極１０との間に弱電性クーラント１１を供給し、導
電性砥石６を電解ドレッシングする。ここで、ドレス電
極１０に印加する電流は通常の電解ドレッシングに比べ
て大きな電流を印加する。通常の電解ドレッシングおよ
び電解ドレッシング研削においては、電解電流は０．５
Ａ以下であるが本実施例においてはこの電解電流を２Ａ
とした。A processing method using the above processing apparatus will be described below. The work 14 and the conductive grindstone 6 are mounted on a grinding device, the conductive grindstone 6 is rotated, a weakly conductive coolant 11 is supplied between the conductive grindstone 6 and the dress electrode 10, and the conductive grindstone 6 is electrolytically dressed. I do. Here, the current applied to the dress electrode 10 is larger than that of a normal electrolytic dressing. In ordinary electrolytic dressing and electrolytic dressing grinding, the electrolytic current is 0.5
A or less, but in this embodiment, this electrolytic current is 2 A
And
【００２８】次に、電解ドレッシングを行いつつワーク
１４に対して導電性砥石６を切り込み、ワーク１４に対
して電解ドレッシング研削を行う。このときのドレス電
流値も先の電解ドレッシング同様、通常の電解ドレッシ
ング研削に比べて大きな電流（２Ａ）を印加する。上記
のように電解電流値を大きくして行う電解ドレッシング
研削を導電性砥石６のツルーイング工程とするが、本実
施例においてはＣＧ研削方法を用いているため、このツ
ルーイング工程においても、ワーク１４に対して所望の
形状を形成し、製品とすることができる。このツルーイ
ング工程を数個のワーク１４に対して行う。Next, the conductive grindstone 6 is cut into the work 14 while performing the electrolytic dressing, and the electrolytic dressing grinding is performed on the work 14. At this time, a large current (2 A) is applied to the dress current value as compared with the normal electrolytic dressing grinding, similarly to the previous electrolytic dressing. The electrolytic dressing grinding performed by increasing the electrolytic current value as described above is the truing step of the conductive grindstone 6, but in this embodiment, the CG grinding method is used. On the other hand, a desired shape can be formed to obtain a product. This truing step is performed on several works 14.
【００２９】上記のように電解電流値を大きくすること
により、通常の電解ドレッシング研削に比べて導電性砥
石６の加工面７のボンド材および砥粒の流出が早いた
め、導電性砥石６の回転軸の回転中心に対して加工面７
の形状の中心が偏心し、導電性砥石６の加工面７全面が
ワーク１４の被加工面に当接していない場合でも、短時
間で導電性砥石６の加工面７の全面がワーク１４の被加
工面に当接し、導電性砥石６の加工面７の形状はワーク
１４の被加工面の形状に倣う。By increasing the electrolytic current value as described above, the outflow of the bonding material and the abrasive grains on the processing surface 7 of the conductive grindstone 6 is faster than in ordinary electrolytic dressing grinding. Machining surface 7 with respect to shaft rotation center
Even if the center of the shape is eccentric and the entire surface 7 of the conductive grindstone 6 is not in contact with the surface to be processed of the work 14, the entire surface of the surface 7 of the conductive grindstone 6 is covered with the workpiece 14 in a short time. The shape of the processing surface 7 of the conductive grindstone 6 is in contact with the processing surface, and follows the shape of the processing surface of the work 14.
【００３０】数個のワーク１４に対して電解ドレッシン
グ研削加工を行い、導電性砥石６の加工面７の形状がワ
ーク１４の被加工面の形状に倣った時点でツルーイング
工程を終了する。ツルーイング工程の完了後、電源装置
８によって印加する電流値を、通常電解インプロセスド
レッシング研削時の値に設定し、通常加工速度にてワー
ク１４の球面創成加工を行う。Electrolytic dressing grinding is performed on several works 14, and the truing step is completed when the shape of the processing surface 7 of the conductive grindstone 6 follows the shape of the processing surface of the work 14. After the truing step is completed, the current value applied by the power supply device 8 is set to the value at the time of the normal electrolytic in-process dressing grinding, and the spherical work of the workpiece 14 is performed at the normal processing speed.
【００３１】本実施例によれば、上記ツルーイング工程
により短時間で導電性砥石のツルーイグが完了し、通常
研削速度による高能率な球面創成加工工程に移行できる
ため、加工初期より砥石の加工能力を十分に発揮した加
工が行え、安定した加工が持続できる。また、砥石の回
転軸の回転中心に対して砥石加工面の形状の中心が偏心
し、砥石の加工面全面がワークの被加工面に当接してい
ない場合においても、この電解ドレッシング研削による
と、短時間でツルーイングを終了することが可能とな
り、以後の通常の電解ドレッシング研削においてワーク
を精度良く加工することが可能となる。According to this embodiment, the truing process of the conductive grindstone is completed in a short time by the truing process, and the process can be shifted to a highly efficient spherical generating process at a normal grinding speed. Sufficient processing can be performed and stable processing can be maintained. Also, according to this electrolytic dressing grinding, even when the center of the shape of the grinding wheel processing surface is eccentric with respect to the rotation center of the rotation axis of the grinding wheel, and the entire processing surface of the grinding stone is not in contact with the work surface of the work, Truing can be completed in a short time, and the workpiece can be processed with high precision in the subsequent ordinary electrolytic dressing grinding.
【００３２】[0032]
【実施例２】図９は本実施例で用いる装置を示す概略構
成図である。本実施例は、前記実施例１におけるワーク
１４に代わり粗粒砥石２１を用いた点が異なり、他の構
成は同一な構成部分から成るもので、同一構成部分には
同一番号を付してその説明を省略する。[Embodiment 2] FIG. 9 is a schematic structural view showing an apparatus used in this embodiment. This embodiment is different from the first embodiment in that a coarse grain grindstone 21 is used in place of the work 14, and the other components are composed of the same components. Description is omitted.
【００３３】本実施例においては、アルミナセラミック
ス等の砥粒からなる粗粒砥石２１の球面創成加工に本発
明の電解ドレッシング研削方法を用いた。In the present embodiment, the electrolytic dressing grinding method of the present invention was used for forming a spherical surface of the coarse-grain grindstone 21 made of abrasive grains such as alumina ceramics.
【００３４】本実施例によれば、ツルーイング工程での
ワークが粗粒砥石２１であるために、導電性砥石の加工
面の表面の絶縁酸化皮膜の除去効率が高まり、更に短時
間でツルーイング工程の加工が完了する。According to the present embodiment, since the workpiece in the truing step is the coarse-grain grindstone 21, the efficiency of removing the insulating oxide film on the surface of the processed surface of the conductive grindstone is increased, and the truing step can be performed in a shorter time. Processing is completed.
【００３５】[0035]
【発明の効果】以上説明した様に、本発明に係る電解ド
レッシング研削方法によれば、電解インプロセスドレッ
シング研削法を適用した光学素子の球面創成加工におい
て、ツルーイングが短時間で完了するため、加工初期よ
り高能率で安定した球面創成加工が続けられ、精度の高
い光学素子を安定して得ることができる。As described above, according to the electrolytic dressing grinding method of the present invention, truing is completed in a short time in the spherical surface forming of an optical element to which the electrolytic in-process dressing grinding method is applied. Spherical surface creation processing with high efficiency and stability is continued from the beginning, and a highly accurate optical element can be stably obtained.
【図１】本発明を示す概念図である。FIG. 1 is a conceptual diagram illustrating the present invention.
【図２】本発明を示すグラフである。FIG. 2 is a graph illustrating the present invention.
【図３】本発明を示すグラフである。FIG. 3 is a graph illustrating the present invention.
【図４】本発明を示すグラフである。FIG. 4 is a graph illustrating the present invention.
【図５】本発明を示す砥石加工面の状態の概念図であ
る。FIG. 5 is a conceptual diagram showing a state of a grindstone processing surface according to the present invention.
【図６】本発明を示す砥石加工面の状態の概念図であ
る。FIG. 6 is a conceptual diagram showing a state of a grindstone processing surface according to the present invention.
【図７】本発明を示す砥石加工面の状態の概念図であ
る。FIG. 7 is a conceptual diagram showing a state of a grinding wheel processing surface according to the present invention.
【図８】実施例１を示す概略構成図である。FIG. 8 is a schematic configuration diagram showing a first embodiment.
【図９】実施例２を示す概略構成図である。FIG. 9 is a schematic configuration diagram showing a second embodiment.
【図１０】従来例を示す概略構成図である。FIG. 10 is a schematic configuration diagram showing a conventional example.
【図１１】従来例を示す概略構成図である。FIG. 11 is a schematic configuration diagram showing a conventional example.
【図１２】従来例を示す部分拡大断面図である。FIG. 12 is a partially enlarged sectional view showing a conventional example.
【図１３】従来例を示す部分拡大断面図である。FIG. 13 is a partially enlarged sectional view showing a conventional example.
【図１４】従来例を示す概略構成図である。FIG. 14 is a schematic configuration diagram showing a conventional example.
１ ブラシ ２ 導電性砥石 ３ 加工面 ４ ドレス電極 ５ 弱電性クーラント １５ 電源装置 １６ ワーク DESCRIPTION OF SYMBOLS 1 Brush 2 Conductive grindstone 3 Processing surface 4 Dress electrode 5 Weakly conductive coolant 15 Power supply device 16 Work
Claims (1)
電性砥石によるワークに対する加工初期に電解電流値を
大きくして導電性砥石をツルーイングし、ツルーイング
終了後は通常の電解電流値によって加工を行うことを特
徴とする電解ドレッシング研削方法。In an electrolytic dressing grinding method, an electrolysis grindstone is trued by increasing an electrolysis current value at an early stage of processing a workpiece with a electroconductive grindstone, and after the truing is completed, processing is performed with a normal electrolysis current value. Electrolytic dressing grinding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04179157A JP3078404B2 (en) | 1992-06-12 | 1992-06-12 | Electrolytic dressing grinding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04179157A JP3078404B2 (en) | 1992-06-12 | 1992-06-12 | Electrolytic dressing grinding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05345273A JPH05345273A (en) | 1993-12-27 |
| JP3078404B2 true JP3078404B2 (en) | 2000-08-21 |
Family
ID=16060946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04179157A Expired - Fee Related JP3078404B2 (en) | 1992-06-12 | 1992-06-12 | Electrolytic dressing grinding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3078404B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059650B (en) * | 2010-07-22 | 2013-08-28 | 上海交通大学 | Precise on-site measuring device and measuring method for sphericity of spherical surface |
-
1992
- 1992-06-12 JP JP04179157A patent/JP3078404B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05345273A (en) | 1993-12-27 |
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