1296225 九、發明說明： ~ 【發明所屬技術領域】 I發曰月係有關將光學球面鏡片作研削加工之鏡片研削 • 方法及鏡片研削裝置，更詳言之，係有關在工具板件不產 . 生偏摩耗之下可精度佳地研削加工球面鏡片，且可短時間 並有效率地執行研削加工之鏡片研削方法及鏡片研削裝 置。 Φ 【先前技術】 在光學球面鏡片之研削方法方面，利用碗型砂輪之球 面生成法係廣為人知。以此方法而言，如圖3所示般，對 以轴線100為中心而旋轉之加工對象的玻璃素材1〇1，按 壓以軸線102為中心旋轉的碗型砂輪103之球面研削面1 〇4 而一邊施行研削加工而生成以轴線1 〇〇、丨〇2的交點為球心 之球面105。此加工方法雖然為完整的球面生成方法，然 而具有依碗型砂輪103之摩耗所造成之曲率的不正常，而 _ 在玻璃素材1 〇 1之研削面的中心部分產生殘屑等之問題 點0 本案申請人係在日本專利j p — A2003 — 340702號公 報中^案有金鋼石工具插動旋轉式之鏡片研削方法。若採 用在此所揭示之鏡片研削方法，則可解消利用碗型砂輪之 球面生成法中所發生的問題。特別是在大曲率之鏡片面的 研削加工中，也具有在所獲得之鏡片面的曲率不均一較少 的優點。 1296225 【發明内容】 然而，在研削加工小曲率的鏡片面之場合，隨著曲率 小使得曲率之公差的範圍也狹小。因此，即使是在使用本 ‘案申請人所提案的上述鏡片研削方法之場合，有時也具有 、起因於工具板件之稍微的偏摩耗而造成鏡片面的精度降低 之問題點。 又以加工對象的鏡片素材而言，在利用斷面為將矩 φ形棒狀的素材切斷而獲得的切斷材之場合，切削量係因應 研削加工的進行而大幅地變化。亦即，切削加工一開始係 如圖2(a)所不般，只有鏡片素材的兩端與工具板件的研 削面碰觸，因此，切削量只有一點點。切削繼續進行之後， 則如圖2 ( b )所示般，鏡片素材之兩端部分係被切削為球 面狀，成為與工具板件之研削面作面接觸之狀態，切削量 係增加。而在切削加工之最終段階中，如圖2 ( c )所示般， 鏡片素材之加工面係成為球面狀，該加工面全體係成為與 馨工具板件之研削面作面接觸之狀態，切削量係成為最大。 然而，以往，係以同一切削速度進行加工，且未針對此點 有任何考慮下係會在加工時間上發生浪費。 本發明之課75¾乃係有鑑於此種問題點，而提案出可對 小曲率的球面鏡片面進行精度佳的加工之鏡片研削方法及 鏡片研削裝置。 又’本發明之課題為提案一種可將切斷材有效率地作 切削加工，且精度佳地加工小曲率的球面鏡片面之鏡片研 削方法及鏡片研削裝置。 1296225 為解決上述課題，本發明之鏡片研削方法之特徵為， 使研削面為j泉面的鏡片研削用卫具板件以通過前述球面的 球心之旋轉中心線為中心作旋轉，同時使該旋轉中心線以 描繪把前述球心作為頂點的圓錐面般地使球心插動，將鏡 片素材以指定的進給速度進給於通過前述球心的進給方 向，且按壓於正在旋轉及進行球心揺動之前述卫具板件的 研削面’將被按壓於前述卫具板件之前述鏡片素材而一邊 以指定的切削進給速度進給，一邊研削加工該鏡片素材， 因應則述鏡片素材的進給量而變更前述切削進給速度。 本發明之鏡片研削方法，係使具備球面研削面之工具 板件以其旋轉中心線描繪以球面研削面之球心為頂點的圓 錐面般地，-邊使球心摇動_邊研削加玉鏡片素材。如此 藉由使工具板件揺動運動，而可精度佳地加工小曲率的球 面鏡片面。且作成使切削進給速度因應鏡片素材的進給量 而作變更。例如’在對矩形斷面之切斷材進行球面鏡片面 之研削加工的場合，因為加工當初係切削量少，因而以快 的進給速度進給，而在切削進展㈣程度之後，再以較其 還it的進給速度作進給的$，則可有效率地進行加工。 在此，前述切削進給速度係可因應進給量而進行無段 ，速。而也可進行有段減速來取代。通常，若在前述進給 量到達指定量之前係將前述切削進給速度設定為第 二而在到達之後’係切換成較第1速度慢的第2速度就 可以。 在此種場合，在研削加工之前，藉由將前述鏡片素材 1296225 送出並檢測與前述玉具板件接觸的位置，而可正確地設定 °位置。又，依據此加工開始位置，設定前述切削 進、口速度之切換位置，同時對該加工開始位置加算加工限 X斤求得的位1设定為加工完了位置，依此係而可實現在 、不浪費加工時間下進行有效率的研削加工。 义為了精度佳地檢測前述加工開始位置，係、將用以進給 述兄片素材之工件進給台朝向工具板件微動進給，而在 φ確認該鏡片素材既與工具板件抵接之後再停止工件進給台 之微動進給，接著，使卫件進給台以超低速返回自工具板 件離開的方向，將鏡片素材自工具板件離開瞬間的位置設 定作為加工開始位置就可以。 在此，將前述工具板件由球心揺動體以旋轉自如的狀 態作支持，且設此球心揺動體之外周面為球面，將此外 周面載於把前述工具板件的研削面之球心作為球心的球面 形狀之支持面，對此等外周面與支持面之間供給壓縮空氣 馨以使前述球心摇動體上》，而一邊維持纟浮狀態一邊使前 述球心摇動體進行球心揺動者係較佳。 如此，當利用壓縮空氣使球心揺動體上浮時，可將其 揺動時的阻力大幅地減低，且也可抑制其支持面的摩耗。 因此，可使球心摇動體正確且平順地進行球心揺動，因此， 可使支持在那的工具板件正確地進行球心摇動，所以可對 球面鏡片面進行精度佳的加工。 一方面’本發明係有關依上述之研削方法來研削加工 鏡片素材之鏡片研削裝置者，本發明之鏡片研削裝置係具 1296225 有：具有球面形㈣研削面之工具板# ;將此工具板件以 在通過前述研削面的球心之旋轉中心線附近成旋轉自如的 狀態加以支持的工具板件心轴（spindle);將前述卫具板件 心麵支持的球^摇動體；前述工具板件之旋轉中心線會在 以則述球心為頂點的圓錐面上旋轉般地使前述球心揺動體 進行球心揺動的摇動機構；用以使前駐具板件心轴在前 述旋轉中心線附近旋轉之工具板件旋轉機構；保持加工^ 象的鏡片素材之鏡片保持器；用以將此鏡片保持器沿著通 過前述球心之進給轴線進給之工件進給機構；和用以使前 述鏡片保持器在前述進給轴線附近旋轉之工件旋轉機構. 以及用以把依前述工件進給機構之前述鏡片保持器的進給 動作進行數值控制之數值控制部；且 前述數值控制部係因應該鏡片素材之進給量而變更前 述鏡片保持器所保持之鏡片素材的切削進給速度。 在此，前述數值控制部係在前述進給量達到指定量以 前將前述切削進給速度設為第丨速度，而在到達以後係切 換成較第1速度慢的第2速度。 又，本發明之鏡片研削裝置係具有將前述球心揺動體 以摇動自μ狀態支持之支持孝反、及壓縮$氣供、給機構， 前述球心摇動體具備球面形狀之外周面，前述支持板係具 備以前述工具板件之研削面的球心為球心之球面形狀的圓 環狀内周面，前述外周面與前述圓環狀内周面之間係由前 述壓縮空氣供給機構供給壓縮空氣，前述球心揺動體係Z 由前述支持板之前述圓環狀内周面上浮的狀態保持著。 1296225 在本發明之鏡片研削方法及鏡片研削裝置中，係將具 備有球面研削面的工具板件以其旋轉中心線描繪把球面研 肖J面之球心作為頂點的圓錐面般地一邊進行球心揺動一邊 對鏡片素材研削加卫。如此一來，藉由使工具板件進行摇 動運動而可對小曲率的球面鏡片面作精度佳的加工。 且作成使切削進給速度因應鏡片素材的進給量而變 更。例如，在對矩形斷面之切斷材進行球面鏡片面研削加 工之場合，在加工一開始時因為切削量少，故以快的進給 速度進給，而在切削進展到某程度之後再以較其還慢的進 給速度作進給。因此，可在加工時間上不造成浪費下而有 效率地對球面鏡片面進行切削加工。 再者，將切削加工之開始位置正確地把握，據此而設 定切削進給速度之切換時點及切削完了時點。依此亦可節 省加工時間之浪費而有效率地進行球面鏡片面之切削加 工° 再者’利用壓縮空氣而使得將旋轉自如地支持工具板 件的球心摇動體以上浮的狀態作支持。因此，可大幅地減 低球心摇動體在摇動時的阻力，又，其支持面的摩耗也可 受到抑制。因此，可使球心摇動體所支持的工具板件正確 地進行球心摇動，依此亦可獲得使球面鏡片面精度佳地作 加工之效果。 【實施方式】 以下茲參照圖面來說明適用本發明之光學球面鏡片的 1296225 研削裝置之實施形態。 圖1係顯示本實施形態相關之光學球面鏡片的研削裝 置之主要部分的概略構成圖。參照此圖來說明可知，研削 • 裝置1係包含具備有用以保持加工對象之鏡片素材w的鏡 •片保持器3、以及對鏡片保持器3所保持之鏡片素材冒作 研削加工之球面研削面4a的工具板件4。 鏡片保持器3係以其保持面3a成為朝下般地水平保持 _ 的狀態下而被固定在垂直的鏡片心軸5之下端。鏡片、、轴 5的中心係形成有在其轴線方向延伸之吸引通路，而其 下端係在鏡片保持器3之保持面3a的中心開口，其上端係 經由旋轉接頭6及空氣過濾器7而與真空產生器8之吸引 側連通。藉由真空產生器8真空吸引吸引通路5&，鏡片 素材W係被吸附保持於鏡片保持器3的保持面。 鏡片心轴5係在上端被封鎖之圓筒狀的垂直保持筒9 之内部以同轴狀態配置，經由上下一對之轴承1〇、U以旋 魯轉自如的狀態由該垂直保持筒9所支持著。又，鏡片心轴 5係形成以其垂直中心線之鏡片旋轉中心線5八為中心而被 鏡片軸旋轉用電動機12所旋轉驅動。垂直保持筒9的上端 係連接著氣壓缸13，此氣壓缸13係固定在上端被封鎖之 支持圓筒14的内部。垂直保持筒9係依氣壓缸13而形成 在下方被以指定的力按壓。 鏡片心轴5係依工件進給機構2〇而被昇降。工件進給 機構20係具備水平臂21、安裝在此水平臂21前端的垂^ 圓筒部22、及以同轴狀態被插入之垂直保持筒9，支持圓 1296225 筒14係固定在水平臂21的上面。水平臂21係藉由具備著 進給螺桿23、螺帽24及伺服馬達25的昇降機構而沿著垂 直線性導引件26昇降。 在此，藉由氣壓缸13而支持著鏡片心轴5的支持圓 •筒14係安裝有用以檢測裝著在其内侧之垂直保持筒9的上 端9a之近接感測器27。通常此近接感測器27係〇FF狀態， 而在垂直保持琦9相對於支持圓筒14上昇時，其上端 _係被近接感測器27所檢測，該感測器輸出係切換為ON。 H配置在鏡片保持器3的下方之ji具板件4係配 置成其球面研削面4a的球心〇位在鏡片保持器3側之鏡片 旋轉中心線5 A的延長上。在此工具板件4的背面係一體形 成有心轴4b，此心軸4b係由球心摇動體31以旋轉自如的 狀態支持著。在此，工具板件4的旋轉中心線4A於球心〇, 係對垂直延伸的鏡片旋轉中心線5A以銳角0交差那樣地 由球心摇動體3 1來支持心轴4b。 • 球心摇動體31具備有半球狀之碗狀部分31a，及由此 碗狀部分31a之底中心的外周面部分朝半徑方向之外方突 出的圓筒部分31b，而在圓筒部分31b係以同轴狀態旋轉 自如的狀態安裝心轴4b。又，從圓筒部分31b之下端部係 橫向方延伸有凸緣31c，而在此係搭載有心轴驅動用之電動 機32 〇 球心揺動體31之碗狀部分31a係由形成在支持板33 之圓環狀内周面33a以可揺動球心的狀態被支持著。圓環 狀内周面33a係以球心〇作為球心的球面，搭栽於此圓 12 1296225 環狀内周面33a之外周面31d為球面的碗狀部分3U係能 • 以球心〇為中心作摇動。在本例當中，圓環狀内周面33a 係形成壓縮空氣人出孔或者溝3 3 b，形成經由壓縮空氣供 給路33c而對此處供給壓縮空氣。所以，碗狀部分31&係 被保持成由圓環狀内周面33a上浮的狀態。因此，可使球 心摇動體3 1以球心Ο為中心而圓滑地摇動。 球心揺動體3 1的下端係隔著連桿接頭34及摇動幅度 _ 調整單元35而與電動機刊之輸出轴連結。球心摇動體31 與連桿接頭34的連結點34a係位在工具板件旋轉中心線 4A之延長線上，電動機36之旋轉中心線36八係經常被保 持面向球心〇的狀態。當操作揺動幅度調整單元35之調整 鈕35a之後，連結點34a與電動機36之旋轉中心線36A的 間隔係產生變化。因而，可調整球心摇動體31之摇動運動 的揺動幅度。 其次，電動機36係由摇動角調整單元37所支持著。 •摇動角調整單元37係具備有配置在固定位置之弓形的凸 輪38，此凸輪38係為以球心〇為中心的圓弧形狀。支持 構件39係以沿著此凸輪38可滑動的狀態而被安裝，在此 係安裝有電動機36。而在支持構件39係被螺帽4〇所固定， 螺帽40係被進給螺桿41螺入。進給螺桿41之端部係被連 接至操作輪42。 當轉動操作輪42時，支持構件39係沿著凸輪38而移 動。亦即，由球心摇動體31所支持的工具板件心軸仆係 以球心。為中心而僅被摇動指定量。因此，利用揺動角調 13 1296225 整單元3 7可使工具板件4之旋轉中心線4 A相對於垂直的 鏡片旋轉中心線5 A所成的角度0，亦即，可變更揺動中心 線之角度。 • 在此’各部分之驅動控制係由數值控制用的控制器5 0 • 所進行。又，控制器50係接續著輸入裝置5丨。經由輸入 裝置51而藉由手動操作係可執行進給鏡片素材的動作，且 可執行切削量等之設定。 鲁兹參照圖2來說明此構成之鏡片研削裝置i的動作。 首先，係使鏡片素材W吸附保持於鏡片保持器3。接著， 依手動操作驅動伺服馬達25而將鏡片素材w朝向工具板 件4微動（JOG)進給。在鏡片素材w接觸工具板件4之 後，鏡片軸心轴5的下降係停止。在其後，只有水平臂2 i (工件進給台）會依微動進給而下降。結果，鏡片心轴5 以及將其旋轉自如地支持之垂直保持筒9係相對於水平臂 21上昇，近接感測器27係檢測垂直保持筒9的上端9a而 φ 切換成ON。 在確認了近接感測器27既切換成ON的狀態後，暫且 中止微動進給。之後，使伺服馬達25的進給速度設為超低 速而使水平臂21上昇。而在水平臂21上昇時，停止的鏡 片心軸5及垂直保持筒9係相對地對近接感測器27下降。 此結果為，垂直保持筒的上端9a係離開近接感測器27的 檢測位置，近接感測器27係再度返回〇FF。控制器5〇係 將此切換到OFF瞬間的位置作為加工開始位置而加以纪 憶。 1296225 控制器50係由此加工開始位置加算加工限度以設定 加工70 了位置。且’對加工開始位置加算帛！切削量之分 里而將速度變更點作設定。如此，在將各點作設定之後， :加工開始指♦被輸入之後，開始工具板件4及鏡片保持 器3所吸附固定之鏡片素材w的旋轉。之後，將鏡片素材 W以快速進給的方式送出至加工開始位置。 在到達加工開始位置之後，將速度切換為第丨切削速 度，再以此速度一邊將鏡片素材w進給一邊進行研削。圖 2 ( a )係顯示研削開始時的狀態。 鏡片素材W僅被切削第丨切削量，而在到達第1切削 位置之後，亦即，在到達圖2 ( b)所示那樣的切削狀態之 後，使球心插動體31開始摇動，再以較第丨切削速度還慢 的精加工速度將鏡片素材w進給而進行切削。此結果係形 成鏡片素材W被研削成如圖2(c)所示般之球狀鏡片面 Wa 〇 在確認了既到達加工完了位置之狀態時，於停止球心 摇動體3 1的摇動之後，使水平臂21上昇至上端位置。之 後，再停止工具板件4及鏡片素材W之旋轉。 【圖式簡單說明】 圖1顯示適用本發明之球面玻璃鏡片的研削裝置之主 要部分的概略構成圖。 圖2顯示圖1之研削裝置的研削動作之說明圖。 圖3顯示以往的球面生成法之研削的說明圖。 15 1296225 3..鏡片保持器 【元件符號說明】 1.. 鏡片研削裝置 4 a..球面研削面 5.. 鏡片心轴 20.. 工件昇降機構 3 1..球心揺動體 33a..圓環狀内周面 35·.摇動幅度調整單元 37··摇動角調整單元 0,·球心 4..工具板件 4A..工具板件之旋轉中心線 5A..鏡片旋轉中心線 21.. 水平臂 33.. 支持板 33b..壓縮空氣吹出孔或溝 36A..旋轉中心線 W..鏡片素材1296225 IX. Description of the invention: ~ [Technical field of the invention] I is a lens grinding method and a lens grinding device for grinding optical spherical lenses, and more specifically, it is not produced in tool plates. Under normal wear and tear, the spherical lens can be ground with high precision, and the lens grinding method and the lens grinding device can be performed in a short time and efficiently. Φ [Prior Art] In the grinding method of optical spherical lenses, the spherical surface generation method using bowl-shaped grinding wheels is widely known. In this way, as shown in FIG. 3, the glass material 1〇1 of the object to be processed which is rotated about the axis 100 is pressed against the spherical grinding surface 1 of the bowl-shaped grinding wheel 103 which is rotated about the axis 102. 4 While performing the grinding process, the spherical surface 105 having the intersection of the axes 1 〇〇 and 丨〇 2 is generated. Although this processing method is a complete spherical surface forming method, the curvature caused by the wear of the bowl-shaped grinding wheel 103 is abnormal, and _ the problem of scraping in the center portion of the grinding surface of the glass material 1 〇 1 is 0. The applicant of the present invention is in the Japanese Patent Jp-A2003-340702, which has a diamond grinding tool for inserting a rotary lens. If the lens grinding method disclosed herein is employed, the problems occurring in the spherical surface forming method of the bowl type grinding wheel can be eliminated. In particular, in the grinding process of the lens surface having a large curvature, there is also an advantage that the curvature of the obtained lens surface is less uniform. 1296225 [Summary of the Invention] However, in the case of grinding a lens surface having a small curvature, the range of the tolerance of the curvature is narrow as the curvature is small. Therefore, even when the above-described lens grinding method proposed by the applicant of the present invention is used, there is a problem that the accuracy of the lens surface is lowered due to a slight unevenness of the tool plate member. Further, in the case of the lens material to be processed, when the cutting material obtained by cutting the material having the radius φ-shaped rod shape is used, the amount of cutting greatly changes depending on the progress of the grinding process. That is, the cutting process is initially started as shown in Fig. 2(a), and only the both ends of the lens material are in contact with the grinding surface of the tool plate member, so the cutting amount is only a little. After the cutting is continued, as shown in Fig. 2 (b), both ends of the lens material are cut into a spherical shape, and the surface of the tool plate is brought into surface contact with each other, and the amount of cutting is increased. In the final stage of the cutting process, as shown in Fig. 2 (c), the processing surface of the lens material is spherical, and the entire surface of the machined surface is in surface contact with the grinding surface of the sinuous tool plate member, and the cutting is performed. The quantity system is the largest. However, in the past, machining was performed at the same cutting speed, and there was no consideration for this point, which would waste time in processing time. In view of such a problem, the present invention teaches a lens grinding method and a lens grinding device which can perform precision processing on a spherical lens surface having a small curvature. Further, the subject of the present invention is to propose a lens grinding method and a lens grinding device which can efficiently cut a cutting material and process a spherical lens surface having a small curvature with high precision. 1296225 In order to solve the above problems, the lens grinding method of the present invention is characterized in that a lens for grinding a lens for grinding a j-plane is rotated around a center line of rotation of the spherical center of the spherical surface, and The rotation center line interpolates the center of the sphere by drawing a conical surface having the spherical center as a vertex, and feeds the lens material at a predetermined feed speed to the feed direction passing through the center of the sphere, and presses on the rotating and proceeding The grinding surface of the above-mentioned fastener plate of the center of the ball is pressed against the lens material of the fastener plate, and is fed at a predetermined cutting feed speed, and the lens material is ground and processed, and the lens is described. The cutting feed speed is changed by the feed amount of the material. In the lens grinding method of the present invention, the tool plate member having the spherical grinding surface is characterized by a conical surface with the center of the spherical grinding surface as the apex of the spherical center of the spherical grinding surface, and the ball is shaken by the side of the ball. Lens material. Thus, by moving the tool plate member, the spherical lens face having a small curvature can be accurately processed. Further, the cutting feed speed is changed in accordance with the feed amount of the lens material. For example, in the case of grinding a spherical lens surface on a material having a rectangular cross section, since the amount of cutting is small at the beginning of the machining, the feed is fed at a fast feed rate, and after the cutting progress (fourth), Also, the feed rate of it is made for the feed, and it can be processed efficiently. Here, the cutting feed speed can be stepless and speed-dependent depending on the feed amount. It can also be replaced by a section of deceleration. Usually, the cutting feed speed is set to be the second before the feed amount reaches the predetermined amount, and the second speed is set to be slower than the first speed after the arrival. In this case, the position of the lens material can be accurately set by sending the lens material 1296225 and detecting the position in contact with the jade plate member before the grinding process. Further, according to the machining start position, the switching position of the cutting inlet and the opening speed is set, and the bit 1 obtained by adding the machining limit to the machining start position is set as the processed position, and the system can be realized. Efficient grinding without wasting processing time. In order to accurately detect the processing start position, the workpiece feeding table for feeding the parent material is slightly fed toward the tool plate member, and after φ confirms that the lens material is in contact with the tool plate member. Then, the jog feed of the workpiece feeding table is stopped, and then the guard feeding table is returned to the direction away from the tool plate at an ultra-low speed, and the position at which the lens material is separated from the tool plate is set as the machining start position. Here, the tool plate member is supported by the spherical yoke body in a rotatable state, and the outer peripheral surface of the spherical core swaying body is a spherical surface, and the peripheral surface is placed on the grinding surface of the tool plate member. The spherical core serves as a supporting surface of the spherical shape of the spherical center, and the compressed air is supplied between the outer peripheral surface and the supporting surface so that the spherical core swings on the body, while the spherical core is shaken while maintaining the floating state. It is preferred that the moving body perform the ball movement. As described above, when the spherical swaying body is lifted by the compressed air, the resistance at the time of swaying can be greatly reduced, and the wear of the supporting surface can be suppressed. Therefore, the spherical body can be accurately and smoothly swayed by the center of the ball. Therefore, the tool plate supported there can be accurately rocked, so that the spherical lens surface can be processed with high precision. On the one hand, the present invention relates to a lens grinding device for grinding a lens material according to the above-described grinding method, and the lens grinding device device 1296225 of the present invention has a tool plate having a spherical shape (four) grinding surface; a tool plate spindle supported in a state of being rotatable in the vicinity of a center line of rotation of the center of the ball passing through the grinding face; a ball supporting body supported by the core of the guard plate; the tool plate The rotation center line of the piece rotates the spherical body of the spherical body in a spherical shape on the conical surface which is the apex of the spherical center; the front slab member has a mandrel in the aforementioned a tool plate rotating mechanism rotating near the center line; a lens holder for holding the lens material of the processing; a workpiece feeding mechanism for feeding the lens holder along a feeding axis passing through the center of the ball; And a workpiece rotating mechanism for rotating the lens holder in the vicinity of the feed axis; and for numerically controlling the feeding action of the lens holder according to the workpiece feeding mechanism Value control unit; cutting said front lens unit and the numerical control system to be due to the material feed rate is changed to maintain the lens material of the lens is held by the feed rate. Here, the numerical control unit sets the cutting feed speed to the second speed before the feed amount reaches the predetermined amount, and switches to the second speed that is slower than the first speed after arrival. Further, the lens grinding device of the present invention has a support mechanism for supporting the filial piety and the compression of the spherical core swaying body in a state of being shaken, and the spherical body of the spherical body having a spherical shape and a peripheral surface. The support plate is provided with an annular inner peripheral surface having a spherical shape in which the center of the grinding surface of the tool plate member is a spherical center, and the outer peripheral surface and the annular inner peripheral surface are supplied by the compressed air. The mechanism supplies compressed air, and the spherical center turbulence system Z is held by the floating inner circumferential surface of the support plate. 1296225 In the lens grinding method and the lens grinding device of the present invention, the tool plate member having the spherical grinding surface is drawn by the conical surface of the spherical center of the spherical surface of the spherical surface. The heart is moving and grinding and grinding the lens material. In this way, the spherical surface of the small curvature can be processed with high precision by the rocking motion of the tool plate. Further, the cutting feed speed is changed in accordance with the feed amount of the lens material. For example, in the case of performing a spherical lens surface grinding on a material having a rectangular cross section, since the amount of cutting is small at the beginning of the processing, it is fed at a fast feed rate, and after the cutting progresses to a certain level, It also feeds at a slow feed rate. Therefore, it is possible to efficiently cut the spherical lens surface without causing waste in processing time. Further, the cutting position of the cutting process is accurately grasped, and the switching point of the cutting feed speed and the time when the cutting is completed are set accordingly. In this way, the machining of the spherical lens surface can be efficiently performed while saving the processing time. Further, the compressed air is used to support the state in which the spherical body of the tool plate is rotatably supported. Therefore, the resistance of the spherical body to the rocking motion can be greatly reduced, and the wear of the supporting surface can be suppressed. Therefore, the tool plate supported by the spherical body can be correctly rocked, and the spherical lens surface can be processed with high precision. [Embodiment] Hereinafter, an embodiment of a 1296225 grinding device to which the optical spherical lens of the present invention is applied will be described with reference to the drawings. Fig. 1 is a schematic configuration view showing a main part of a grinding device for an optical spherical lens according to the present embodiment. Referring to the figure, the grinding apparatus 1 includes a mirror holder 3 having a lens material w for holding the object to be processed, and a spherical grinding surface for grinding the lens material held by the lens holder 3. Tool plate 4 of 4a. The lens holder 3 is fixed to the lower end of the vertical lens mandrel 5 in a state in which the holding surface 3a is horizontally held _. The lens, the center of the shaft 5 is formed with a suction passage extending in the axial direction thereof, and the lower end thereof is attached to the central opening of the holding surface 3a of the lens holder 3, and the upper end thereof is connected via the rotary joint 6 and the air filter 7 It is in communication with the suction side of the vacuum generator 8. The suction path 5& is vacuum-absorbed by the vacuum generator 8, and the lens material W is adsorbed and held by the holding surface of the lens holder 3. The lens mandrel 5 is disposed coaxially inside the cylindrical vertical holding cylinder 9 whose upper end is blocked, and is vertically rotated by a pair of upper and lower bearings 1 and U. Supported. Further, the lens mandrel 5 is formed to be rotationally driven by the lens shaft rotating motor 12 centering on the lens rotation center line 5 of the vertical center line. The upper end of the vertical holding cylinder 9 is connected to a pneumatic cylinder 13 which is fixed to the inside of the support cylinder 14 whose upper end is blocked. The vertical holding cylinder 9 is formed by the pneumatic cylinder 13 and is pressed by a predetermined force below. The lens mandrel 5 is lifted and lowered according to the workpiece feeding mechanism 2〇. The workpiece feeding mechanism 20 includes a horizontal arm 21, a vertical cylindrical portion 22 attached to the front end of the horizontal arm 21, and a vertical holding cylinder 9 inserted in a coaxial state. The support circle 1296225 is fixed to the horizontal arm 21 by the cylinder 14. The top. The horizontal arm 21 is moved up and down along the vertical linear guide 26 by a lifting mechanism including a feed screw 23, a nut 24, and a servo motor 25. Here, the support cylinder 16 supporting the lens mandrel 5 by the pneumatic cylinder 13 is provided with a proximity sensor 27 for detecting the upper end 9a of the vertical holding cylinder 9 attached thereto. Typically, the proximity sensor 27 is in the FF state, and when the vertical hold Qi 9 rises relative to the support cylinder 14, its upper end is detected by the proximity sensor 27, and the sensor output is switched ON. The ji plate 4 disposed under the lens holder 3 is disposed such that the spherical center of the spherical grinding surface 4a is positioned on the extension of the lens rotation center line 5 A on the lens holder 3 side. A mandrel 4b is integrally formed on the back surface of the tool plate member 4, and the mandrel 4b is rotatably supported by the spherical body oscillating body 31. Here, the rotation center line 4A of the tool plate member 4 supports the mandrel 4b by the spherical core oscillating body 3 1 so that the vertically extending lens rotation center line 5A intersects the vertically extending lens rotation center line 5A. • The spherical core body 31 is provided with a hemispherical bowl-shaped portion 31a, and thus a cylindrical portion 31b in which the outer peripheral surface portion of the bottom center of the bowl portion 31a protrudes outward in the radial direction, and in the cylindrical portion 31b The mandrel 4b is attached in a state in which the coaxial state is freely rotatable. Further, a flange 31c extends laterally from the lower end portion of the cylindrical portion 31b, and the motor portion 32 for driving the spindle is mounted thereon. The bowl portion 31a of the spherical core damper 31 is formed on the support plate 33. The annular inner peripheral surface 33a is supported in a state in which the center of the ball can be swung. The annular inner peripheral surface 33a is a spherical surface having a spherical center as a spherical center, and is placed on the round 12 1296225, and the outer peripheral surface 33a of the annular inner peripheral surface 33a is a spherical bowl portion 3U capable of The center is shaking. In this example, the annular inner peripheral surface 33a forms a compressed air person exit hole or groove 3 3 b, and is supplied with compressed air thereto via the compressed air supply path 33c. Therefore, the bowl portion 31 & is held in a state of being floated by the annular inner peripheral surface 33a. Therefore, the spherical body 3 1 can be smoothly swayed around the center of the ball. The lower end of the centering body 3 1 is coupled to the output shaft of the motor magazine via a link joint 34 and a rocking amplitude adjusting unit 35. The joint point 34a of the ball core body 31 and the link joint 34 is positioned on the extension line of the tool plate member rotation center line 4A, and the rotation center line 36 of the motor 36 is often held in a state facing the ball core. When the adjustment knob 35a of the sway amplitude adjustment unit 35 is operated, the interval between the joint point 34a and the rotation center line 36A of the motor 36 changes. Therefore, the amplitude of the swaying motion of the oscillating motion of the spherical body oscillating body 31 can be adjusted. Next, the motor 36 is supported by the rocking angle adjusting unit 37. The rocking angle adjusting unit 37 is provided with an arcuate cam 38 disposed at a fixed position, and the cam 38 is formed in an arc shape centered on the center of the ball. The support member 39 is mounted in a slidable state along the cam 38, and an electric motor 36 is mounted therein. On the other hand, the support member 39 is fixed by the nut 4, and the nut 40 is screwed by the feed screw 41. The end of the feed screw 41 is connected to the operating wheel 42. When the operating wheel 42 is rotated, the support member 39 is moved along the cam 38. That is, the spindle of the tool plate supported by the spherical body 31 is centered on the core. For the center, only the specified amount is shaken. Therefore, the angle of the rotation center line 4 A of the tool plate member 4 with respect to the vertical lens rotation center line 5 A can be made by using the tilt angle 13 1296225 integral unit 3 7 , that is, the tilting center line can be changed. The angle. • The drive control for each part is performed by the controller 50 for numerical control. Further, the controller 50 is connected to the input device 5A. The operation of feeding the lens material can be performed by the manual operation via the input device 51, and the setting of the amount of cutting or the like can be performed. Lutz describes the operation of the lens grinding device i of this configuration with reference to Fig. 2 . First, the lens material W is adsorbed and held by the lens holder 3. Next, the lens material w is slightly moved (JOG) toward the tool plate 4 by manually driving the servo motor 25. After the lens material w contacts the tool plate member 4, the lowering of the lens axis 5 is stopped. Thereafter, only the horizontal arm 2 i (workpiece feed table) is lowered by the micro-feed. As a result, the lens mandrel 5 and the vertical holding cylinder 9 rotatably supported are raised relative to the horizontal arm 21, and the proximity sensor 27 detects the upper end 9a of the vertical holding cylinder 9 and φ is switched ON. After confirming that the proximity sensor 27 is switched to the ON state, the jog feed is temporarily suspended. Thereafter, the feed speed of the servo motor 25 is set to an ultra-low speed to raise the horizontal arm 21. When the horizontal arm 21 ascends, the stopped mirror spindle 5 and the vertical holding cylinder 9 are relatively lowered toward the proximity sensor 27. As a result, the upper end 9a of the vertical holding cylinder is separated from the detecting position of the proximity sensor 27, and the proximity sensor 27 is returned to the 〇FF again. The controller 5 加以 changes the position at which the OFF moment is switched to the machining start position. 1296225 The controller 50 adds the machining limit to the machining start position to set the machining position 70. And 'add the calculation start position! The speed change point is set in the amount of cutting. In this manner, after the respective points are set, the processing start finger ♦ is input, and the rotation of the lens material w that is fixed and fixed by the tool plate member 4 and the lens holder 3 is started. Thereafter, the lens material W is fed to the processing start position by rapid feed. After reaching the machining start position, the speed is switched to the third cutting speed, and the lens material w is fed while being ground at this speed. Figure 2 (a) shows the state at the start of grinding. The lens material W is only cut by the second cutting amount, and after reaching the first cutting position, that is, after reaching the cutting state as shown in FIG. 2(b), the spherical inserting body 31 starts to shake, and then The lens material w is fed at a finishing speed that is slower than the second cutting speed to perform cutting. As a result, the lens material W is ground into a spherical lens surface Wa as shown in Fig. 2(c), and when the state of the processed position is confirmed, the shaking of the spherical body 3 1 is stopped. Thereafter, the horizontal arm 21 is raised to the upper end position. Thereafter, the rotation of the tool plate member 4 and the lens material W is stopped. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a schematic configuration of a main part of a grinding device to which a spherical glass lens of the present invention is applied. Fig. 2 is an explanatory view showing a grinding operation of the grinding device of Fig. 1. Fig. 3 is an explanatory view showing the grinding of the conventional spherical surface forming method. 15 1296225 3. Lens holder [Component symbol description] 1.. Lens grinding device 4 a.. Spherical grinding surface 5.. Lens mandrel 20.. Work lifting mechanism 3 1. Spherical swaying body 33a.. Annular inner peripheral surface 35·. Shake amplitude adjustment unit 37··shake angle adjustment unit 0,·ball center 4. Tool plate member 4A.. Tool plate member rotation center line 5A.. lens rotation center line 21. Horizontal arm 33.. Support plate 33b.. Compressed air blow hole or groove 36A.. Rotating center line W.. Lens material