201111076 六、發明說明： 【發明所屬之技術領域】 本發明是關於在硏磨時或修整時螺旋狀砂輪和被加工 齒輪或碟形修整器的咬合之前，先進行螺旋狀砂輪相對於 被加工齒輪或碟形修整器之相位對準的螺旋狀砂輪之相位 對準裝置。 【先前技術】 先前以來，提供有對熱處理後的被加工齒輪即工件， 使用硏磨工具即砂輪進行硏磨，能夠效率良好精加工修整 工件齒面的齒輪磨床。上述齒輪磨床是以砂輪和工件已咬 合的狀態，使該等同步旋轉進行工件的硏磨，因此若咬合 精度不足，恐怕工件的齒面會產生硏磨不均，或會造成過 大的負荷施加在砂輪，減少砂輪壽命。 於是，針對此種的齒輪磨床，爲了高精度進行砂輪和 工件的咬合，在硏磨時的咬合之前，先進行兩者相位定位 的相位對準，使砂輪的切削刃（凹凸）和工件的齒槽（凹 凸）成爲適當的相位關係。如上述，進行砂輪和工件的相 位對準的裝置，例如是揭示在專利文獻1。 〔先行技術文獻〕 〔專利文獻1〕日本特開平5-138438號公報 【發明內容】 〔發明欲解決.之課題〕 -5- 201111076 上述先前的相位對準裝置是將砂輪在工件上朝其軸方 向滑動，由AE感測器對砂輪越過工件螺紋溝槽時的接觸 瞬間及非接觸瞬間進行檢測，在根據該檢測結果所算出的 螺紋溝槽中間位置，使砂輪成相向地將工件朝其軸方向移 動，藉此進行砂輪和工件的相位對準。 然而，上述的先前構成中，砂輪對工件的接觸及非接 觸是由AE感測器對接觸時的工件振動進行檢測加以判定 ，所以針對砂輪在機上可進行修整的齒輪磨床，就需要另 外設置可對砂輪和修整器相位進行對準的AE感測器。如 此一來，恐怕會導致裝置複雜化。 因此，本發明是爲了解決上述課題所硏創而成的發明 ，目的是提供一種以簡樸構成就能夠精密進行螺旋狀砂輪 相對於被加工齒輪或修整器之相位對準的螺旋狀砂輪之相 位對準裝置。 〔用以解決課題之手段〕 用以解決上述課題之第1發明相關的螺旋狀砂輪之相 位對準裝置是一種硏磨時或修整時在進行螺旋狀砂輪和被 加工齒輪或修整器的咬合之前，先進行上述螺旋狀砂輪相 對於被加工齒輪或上述修整器之相位對準的螺旋狀砂輪之 相位對準裝置，其特徵爲，具備： 設置在可使上述螺旋狀砂輪支撐成旋轉的砂輪頭’對 上述螺旋狀砂輪是否接觸被加工齒輪或上述修整器進行檢 測的檢測手段；及 -6- 201111076 根據上述檢測手段檢測出接觸時的上述螺旋狀砂輪的 相位，使上述螺旋狀砂輪定位在可咬合之相位的砂輪相位 控制手段。 用以解決上述課題之第2發明相關的螺旋狀砂輪之相 位對準裝置，其特徵爲： 上述檢測手段是一種可透過噴射在上述螺旋狀砂輪附 近的流體對因振動或摩擦產生的上述螺旋狀砂輪彈性波進 行檢測的聲發射方式流體感測器， 構成爲根據所檢測的彈性波判定上述螺旋狀砂輪是否 已經接觸被加工齒輪或上述修整器。 用以解決上述課題之第3發明相關的螺旋狀砂輪之相 位對準裝置，其特徵爲： 上述流體感測器，是從上述螺旋狀砂輪和被加工齒輪 或上述修整器的接觸位置朝上述螺旋狀砂輪的圓周方向偏 移9 0 °相位的方向噴射流體。 〔發明效果〕 根據本發明相關的螺旋狀砂輪之相位對準裝置時，藉 由利用可使螺旋狀砂輪支撐成旋轉的砂輪頭上所設置的檢 測手段，對螺旋狀砂輪是否已接觸被加工齒輪或修整器進 行檢測，以簡樸構成，就能夠精密進行螺旋狀砂輪相對於 被加工齒輪或修整器之相位對準。 【實施方式】 201111076 〔發明之最佳實施形態〕 以下，使用圖面對本發明相關的螺旋狀砂輪之相位對 準裝置進行詳細說明。 〔實施例〕 應用本發明相關螺旋狀砂輪之相位對準裝置的齒輪磨 床〗’如第2圖所示利用桶形的螺旋狀砂輪14對內齒輪素 材的工件（被加工齒輪）W進行硏磨，再加上，如第1圖 所示’其又具有可利用碟形修整器32對該螺旋狀砂輪14 進行修整的修整功能。 如第1圖至第3圖所示，齒輪磨床1支撐有可移動並 且可旋繞的砂輪頭11»該砂輪頭11可旋轉地支撐有主軸 1 2 ’該主軸1 2的前端形成有砂輪心軸1 3。接著，砂輪心 軸13的前端可裝脫地安裝有螺旋狀砂輪14。即，藉由驅 動砂輪頭1 1 ’就可透過主軸1 2的砂輪心軸1 3旋轉驅動螺 旋狀砂輪1 4。 砂輪頭11的正面可旋轉地支撐有旋轉平台21，該旋 轉平台21的上面’透過未圖示的安裝固定具可裝脫地安 裝有工件W。即’藉由驅動旋轉平台21，就可旋轉驅動 工件W。 旋轉平台21的側方可移動地支撐有修整器驅動部3 i ’該修整器驅動部31安裝有可旋轉並且可裝脫的碟形修 整器32。即’藉由驅動修整器驅動部31，就可旋轉驅動 碟形修整器3 2。 -8 · 201111076 砂輪頭11的前端面透過托座41支撐有聲發射方式的 AE( Acoustic Emission)流體感測器（檢測手段、流體感 測器）42。該AE流體感測器42是透過所噴射的流體檢測 出材料中產生的振動或磨擦等造成的彈性波，將該彈性波 以AE訊號進行處理，其具有：可將做爲流體的冷卻液C 噴射在砂輪心軸1 3指定測定位置的噴射孔42a ;及從該測 定位置對經由冷卻液C所傳播的彈性波進行檢測的檢測部 42b。再加上，AE流體感測器42的噴射孔42a連接有冷 卻液箱43，另一方面其檢測部42b連接有AE感測放大器 4 4° 另，如第4圖所示，硏磨前在進行相對於工件W之 螺旋狀砂輪1 4的相位對準時，AE流體感測器42是設置 在從螺旋狀砂輪14和工件W的接觸位置朝該螺旋狀砂輪 1 4的圓周方向偏移90°相位的位置，構成從該狀態，朝砂 輪心軸1 3的測定位置，噴射冷卻液C。即，在進行相對 於工件W之螺旋狀砂輪1 4的相位對準時的AE流體感測 器42是構成爲從螺旋狀砂輪14和工件W的接觸位置朝 該螺旋狀砂輪14的圓周方向偏移90°相位的方向，往砂輪 心軸13的測定位置，噴射冷卻液C。接著’只要根據工 件W的右旋或左旋，決定好AE流體感測器42的設置位 置是要朝那個方向偏移，則在螺旋狀砂輪14和工件W的 咬合時，即使砂輪頭1 1 (螺旋狀砂輪1 4 )旋繞傾斜’ AE 流體感測器42也不會干涉到工件W。 此外，如第5圖所示，修整前在進行相對於碟形修整 -9 - 201111076 器3 2之螺旋狀砂輪1 4的相位對準時，A E流體感測器4 2 是設置在從螺旋狀砂輪1 4和碟形修整器3 2的接觸位置朝 該螺旋狀砂輪14的周圍方向偏移9(Γ相位的位置，構成爲 從該狀態，朝砂輪心軸1 3的測定位置，噴射冷卻液C。 即，在進行相對於碟形修整器32之螺旋狀砂輪1 4的相位 對準時的ΑΕ流體感測器42是構成從螺旋狀砂輪1 4和碟 形修整器32的接觸位置朝該螺旋狀砂輪14的周圍方向偏 移9 0 °相位的方向，往砂輪心軸1 3的測定位置，噴射冷卻 液C » 接著，從冷卻液箱43供應至ΑΕ流體感測器42的冷 卻液C，例如是硏磨油，其冷卻液壓及噴射流量是可根據 ΑΕ流體感測器42和測定位置之間的距離進行調整。 即，ΑΕ流體感測器42是將冷卻液箱43所供應的冷 卻液C，從噴射孔42a噴射至砂輪心軸1 3的測定位置， 藉此使產生的螺旋狀砂輪14彈性波，透過冷卻液C由檢 測部42b檢測出之後，將該所檢測的彈性波以AE訊號輸 入至AE感測放大器44。其次，如第6圖所示，AE感測 放大器44是將輸入的AE訊號轉換成電壓V，隨時顯示該 電壓V。 另外，齒輪磨床1設有NC裝置（砂輪相位控制手段 )50。該NC裝置50，例如是連接在砂輪頭1 1、旋轉平台 21、修整器驅動部31、AE感測放大器44等，構成爲根據 輸入的工件各種基本條件或加工條件，進行螺旋狀砂輪14 的工件W硏磨控制，或進行碟形修整器3 2的螺旋狀砂輪 -10- 201111076 14修整控制，同時在上述硏磨時或修整時的咬合（齒對準 )之前’先根據AE流體感測器44所檢測的彈性波大小， 判定螺旋狀砂輪1 4和工件W或碟形修整器3 2的接觸及 非接觸，進行螺旋狀砂輪1 4的相位調整。 因此’當利用螺旋狀砂輪1 4對工件W進行硏磨時， 首先，如第2圖所示，將螺旋狀砂輪14移動至安裝在旋 轉平台21的工件W側。其次，在進行螺旋狀砂輪.14和 工件W的咬合之前，最好是先進行該等的大槪相位對準 (粗相位對準）避免螺旋狀砂輪14的刀尖和工件W的齒 頂彼此干涉。接著，以該粗相位對準狀態，同步旋轉螺旋 狀砂輪14和工件W的同時，從AE流體感測器42的噴射 孔42 a朝砂輪心軸1 3的測定位置噴射冷卻液C，由其檢 測部4 2 b開始檢測螺旋狀砂輪1 4的彈性波。 如上述，當AE流體感測器42開始檢測彈性波時，如 第6圖所示，AE感測放大器44是將輸入的該AE訊號轉 換成電壓V，以時間經過的同時顯示出該電壓的變化。另 ，在AE流體感測器42開始檢測彈性波的同時，電壓V 是以螺旋狀砂輪14非接觸時的最大電壓Vf被測出，同時 自動設定有比該電壓Vf還大的臨界値Vo。該臨界値Vo 是在進行下述螺旋狀砂輪14的接觸判定時使用。 接著，只要透過提高工件W的旋轉速度（旋轉速） ，錯開螺旋狀砂輪1 4和工件W的同步旋轉，使工件W — 方的齒面接觸螺旋狀砂輪1 4 一方的刃面。如此一來，經 由接觸產生的螺旋狀砂輪1 4的彈性波就會傳達至砂輪心 -11 - 201111076 軸1 3，該傳達至砂輪心軸1 3的彈性波是透過冷卻液C由 AE流體感測器42檢測出來。此時，如第6圖所示，AE 感測放大器44是根據輸入的AE訊號改變電壓V的波形 ，當該電壓V ( Vf)超過事先設定的臨界値Vo時，NC裝 置5 0就會判定工件W已接觸螺旋狀砂輪1 4，對此時的螺 旋狀砂輪1 4相位進行記憶。 另外，只要透過降低工件W的旋轉速度（旋轉速） ，錯開螺旋狀砂輪14和工件W的同步旋轉’使工件W另 一方的齒面接觸螺旋狀砂輪14另一方的刃面。如此一來 ，經由接觸產生的螺旋狀砂輪1 4的彈性波就會傳達至砂 輪心軸1 3，該傳達至砂輪心軸1 3的彈性波是透過冷卻液 C由AE流體感測器42檢測出來。此時，如第ό圖所示’ ΑΕ感測放大器44是根據輸入的ΑΕ訊號改變電壓V的波 形，當該電壓V(Vf)超過事先設定的臨界値V〇時’ NC 裝置5 0就會判定工件W已接觸螺旋狀砂輪1 4 ’對此時的 螺旋狀砂輪〗4相位進行記憶。 接著，由N C裝置5 0從記憶的2個螺旋狀砂輪14相 位算出其中間的相位即中間相位後’就將螺旋狀砂輪14 的相位定位在該中間相位，藉此就能夠精密進行相位對準 (精密相位對準）。其次，以該精密相位對準狀態’使螺 旋狀砂輪14咬合工件W，然後進行該等同步旋轉’就能 夠使螺旋狀砂輪14的刃面硏磨工件W的齒面。 於此，當使用螺旋狀砂輪1 4對指定數量的工件W進 行硏磨時’其刃面會磨損導致硏磨效率降低’因此需要由 -12- 201111076 碟形修整器32定期進行螺旋狀砂輪14的修整。 於是，以碟形修整器32進行螺旋狀砂輪1 4的修整時 ，首先，如第1圖所示，將螺旋狀砂輪14移動至碟形修 整器3 2側之後，在該等咬合前，以先進行該等的大槪相 位對準（粗相位對準），避免螺旋狀砂輪1 4的刀尖和碟 形修整器3 2刀尖彼此干涉爲佳。接著，以該粗相位對準 狀態，在螺旋狀砂輪1 4旋轉停止狀態下，旋轉碟形修整 器32的同時，從AE流體感測器42的噴射孔42a朝砂輪 心軸1 3的測定位置噴射冷卻液C，由其檢測部42b開始 進行螺旋狀砂輪1 4的彈性波檢測。 如上述，當AE流體感測器42開始檢測彈性波時，如 第6圖所示，AE感測放大器44是將輸入的該AE訊號轉 換成電壓V，以時間經過的同時顯示出該電壓的變化。另 ，在AE流體感測器42開始檢測彈性波的同時，電壓V 是以螺旋狀砂輪1 4非接觸時的最大電壓Vf被測出，同時 自動設定有比該電壓Vf還大的臨界値Vo。該臨界値Vo 是在進行下述螺旋狀砂輪14的接觸判定時使用。 接著，將螺旋狀砂輪1 4正轉，使其一方的刃面接觸 碟形修整器32 —方的刃面。如此一來，經由接觸產生的 螺旋狀砂輪1 4的彈性波就會傳達至砂輪心軸1 3，該傳達 至砂輪心軸1 3的彈性波是透過冷卻液c由AE流體感測 器42檢測出來。此時，如第6圖所示，AE感測放大器44 是根據輸入的AE訊號改變電壓V的波形，當該電壓V( Vf)超過事先設定的臨界値Vo時，NC裝置50就會判定 -13- 201111076 螺旋狀砂輪14已接觸碟形修整器32，對此時的螺旋狀 輪1 4相位進行記憶。 其次，將螺旋狀砂輪14逆轉，使其另一方的刃面 觸碟形修整器3 2另一方的刃面。如此一來，經由接觸 生的螺旋狀砂輪1 4的彈性波就會傳達至砂輪心軸1 3， 傳達至砂輪心軸1 3的彈性波是透過冷卻液C由AE流 感測器42檢測出來。此時，如第6圖所示，AE感測放 器44是根據輸入的AE訊號改變電壓V的波形，當該 壓V(Vf)超過事先設定的臨界値Vo時，NC裝置50 會判定螺旋狀砂輪14已接觸碟形修整器32，對此時的 旋狀砂輪1 4相位進行記憶。 接著，由NC裝置50從記憶的2個螺旋狀砂輪14 位算出其中間的相位即中間相位後，就將螺旋狀砂輪 的相位定位在該中間相位，藉此就能夠精密進行相位對 (精密相位對準）。其次，以該精密相位對準狀態，使 旋狀砂輪14咬合碟形修整器32，然後旋轉碟形修整器 就能夠使碟形修整器32的刃面修整螺旋狀砂輪14的刃 〇 另，本實施例是採用內齒輪素材的工件W，但也可 用外齒輪素材的工件W。此外，螺旋狀砂輪1 4和工件 或碟形修整器3 2的接觸判定所使用的電壓臨界値是共 的臨界値Vo，但也可使用各不相同的値，該等臨界値 可根據各材質或加工條件等加以設定。 因此，根據本發明相關的螺旋狀砂輪之相位對準裝 砂 接 產 該 體 大 電 就 螺 相 14 準 螺 3 2 面 採 W 同 是 匱 -14- 201111076 時，在硏磨時或修整時螺旋狀砂輪14和工件W或碟形修 整器32的咬合之前，先在進行螺旋狀砂輪14相對於工件 W或碟形修整器3 2的相位對準時，利用可使螺旋狀砂輪 1 4支撐成旋轉的砂輪頭1 1上所設置的AE流體感測器42 ，對螺旋狀砂輪1 4是否已接觸工件W或碟形修整器32 進行檢測，根據檢測到接觸時的螺旋狀砂輪1 4相位，使 該螺旋狀砂輪1 4定位在可咬合的相位。如此一來，以簡 樸構成就能夠精密進行螺旋狀砂輪1 4相對於工件W或碟 形修整器3 2的相位對準。 〔產業上之可利用性〕 本發明是可應用在要短縮非加工時間的齒輪磨床。 【圖式簡單說明】 第1圖爲本發明一實施例相關的螺旋狀砂輪之相位對 準裝置槪略構成圖，是表示利用碟形修整器對螺旋狀砂輪 進行修整時的狀態圖。 第2圖爲表示利用螺旋狀砂輪對工件進行硏磨時的狀 態圖。 第3圖爲表示ae流體感測器的安裝構造圖。 第4圖爲表示硏磨時相對於螺旋狀砂輪之a E流體感 測器的設置位置圖。 第5圖爲表示修整時相對於螺旋狀砂輪之AE流體感 測器的設置位置圖。 -15- 201111076 第6圖爲表示AE流體感測器檢測出螺旋狀砂輪彈性 波時的電壓變化圖。 【主要元件符號說明】 1 :齒輪磨床 1 1 :砂輪頭 12 :主軸 1 3 :砂輪心軸 1 4 :螺旋狀砂輪 2 1 :旋轉平台 3 1 :修整器驅動部 3 2 :碟形修整器 41 :托座 42 : AE流體感測器 42a :噴射孔 42b :檢測部 43 :冷卻液箱 44 : AE感測放大器 50 : NC裝置 W :工件 C :冷卻液 V :測定電壓201111076 VI. Description of the Invention: [Technical Field] The present invention relates to a helical grinding wheel with respect to a machined gear before squeezing or trimming of a helical grinding wheel and a machined gear or a dish dresser Or a phase alignment device for the phase-aligned helical grinding wheel of the dish dresser. [Prior Art] Conventionally, a gear grinding machine which is a honing tool, that is, a grinding wheel, is used for honing a workpiece to be processed after heat treatment, and it is possible to efficiently finish and trim the tooth surface of the workpiece. The gear grinding machine is in a state in which the grinding wheel and the workpiece are engaged, and the synchronous rotation is performed to perform the honing of the workpiece. Therefore, if the nip accuracy is insufficient, the tooth surface of the workpiece may be unevenly honed or an excessive load may be applied. Grinding wheel to reduce the life of the grinding wheel. Therefore, in order to accurately engage the grinding wheel and the workpiece for such a gear grinding machine, the phase alignment of the phase positioning of the two is performed before the nip during the honing, so that the cutting edge (concavity and convexity) of the grinding wheel and the teeth of the workpiece The groove (concavity and convexity) becomes an appropriate phase relationship. As described above, a device for aligning the phase of the grinding wheel and the workpiece is disclosed, for example, in Patent Document 1. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. 5-138438. SUMMARY OF INVENTION [Problem to be solved by the invention] -5- 201111076 The above-mentioned prior phase alignment device has a grinding wheel on its workpiece toward its axis. The direction is slid, and the contact moment and the non-contact moment when the grinding wheel passes over the thread groove of the workpiece are detected by the AE sensor, and the grinding wheel faces the workpiece toward the axis in the middle position of the thread groove calculated according to the detection result. The direction is moved, whereby the phase alignment of the grinding wheel and the workpiece is performed. However, in the above-mentioned prior configuration, the contact and non-contact of the grinding wheel to the workpiece are determined by detecting the vibration of the workpiece when the AE sensor contacts, so the gear grinding machine which can be trimmed on the machine for the grinding wheel needs to be additionally set. An AE sensor that aligns the grinding wheel and dresser phase. As a result, I am afraid that the device will be complicated. Accordingly, the present invention has been made in order to solve the above problems, and an object thereof is to provide a phase pair of a spiral grinding wheel capable of precisely aligning a phase of a spiral grinding wheel with respect to a machined gear or a dresser with a simple configuration. Quasi-device. [Means for Solving the Problem] The phase alignment device of the spiral grinding wheel according to the first invention for solving the above-mentioned problems is a honing or trimming process before the splicing of the spiral grinding wheel and the machined gear or dresser a phase alignment device for first performing a spiral grinding wheel with a phase of the helical grinding wheel aligned with respect to a machined gear or the dresser, characterized in that: a grinding wheel head provided to support the spiral grinding wheel to rotate a detecting means for detecting whether the spiral grinding wheel is in contact with the processed gear or the dresser; and -6-201111076 detecting the phase of the spiral grinding wheel at the time of contact according to the detecting means, and positioning the spiral grinding wheel The phase control method of the grinding wheel phase. A phase alignment device for a spiral grinding wheel according to a second aspect of the present invention, characterized in that the detecting means is a spiral that is permeable to vibration caused by vibration or friction by a fluid that is sprayed in the vicinity of the spiral grinding wheel. An acoustic emission type fluid sensor for detecting an elastic wave of a grinding wheel is configured to determine whether the spiral grinding wheel has contacted the machined gear or the dresser based on the detected elastic wave. A phase alignment device for a spiral grinding wheel according to a third aspect of the present invention, characterized in that the fluid sensor is a spiral from a contact position between the spiral grinding wheel and the machined gear or the dresser toward the spiral The fluid is sprayed in the direction in which the circumferential direction of the grinding wheel is offset by 90°. [Effect of the Invention] According to the phase alignment device for a spiral grinding wheel according to the present invention, whether or not the spiral grinding wheel has contacted the machined gear or by using a detecting means provided on a grinding wheel head that can support the spiral grinding wheel to rotate The dresser is tested and constructed in a simple manner to precisely align the phase of the helical grinding wheel with respect to the machined gear or dresser. [Embodiment] 201111076 [Best Embodiment of the Invention] Hereinafter, a phase alignment device for a spiral grinding wheel according to the present invention will be described in detail with reference to the drawings. [Embodiment] A gear grinding machine to which a phase alignment device for a helical grinding wheel according to the present invention is applied is honed as shown in Fig. 2 by using a barrel-shaped spiral grinding wheel 14 to grind a workpiece (machined gear) W of an internal gear material. Further, as shown in Fig. 1, it has a trimming function for trimming the spiral grinding wheel 14 by the dish dresser 32. As shown in FIGS. 1 to 3, the gear grinding machine 1 supports a movable and rotatable grinding wheel head 11» the grinding wheel head 11 rotatably supports a main shaft 1 2 'the front end of the main shaft 1 2 is formed with a grinding wheel spindle 1 3. Next, a spiral grinding wheel 14 is detachably attached to the front end of the grinding wheel spindle 13. That is, the spiral grinding wheel 14 can be rotationally driven by the grinding wheel spindle 13 of the main shaft 1 2 by driving the grinding wheel head 1 1 '. The front surface of the grinding wheel head 11 rotatably supports a rotary table 21, and the upper surface of the rotary table 21 is detachably mounted with a workpiece W through a mounting fixture (not shown). That is, by driving the rotary stage 21, the workpiece W can be rotationally driven. The side of the rotary table 21 is movably supported with a dresser drive portion 3i'. The dresser drive portion 31 is mounted with a rotatable and detachable dish-shaped dresser 32. That is, by driving the dresser driving portion 31, the dish trimmer 32 can be rotationally driven. -8 · 201111076 The front end surface of the grinding wheel head 11 is supported by an acoustic emission type AE (Acoustic Emission) fluid sensor (detection means, fluid sensor) 42 through the bracket 41. The AE fluid sensor 42 detects an elastic wave caused by vibration or friction generated in the material through the injected fluid, and the elastic wave is treated by an AE signal, and has a coolant C which can be used as a fluid. An injection hole 42a that is sprayed at the measurement position of the grinding wheel spindle 13 and a detection portion 42b that detects the elastic wave propagated through the coolant C from the measurement position. Further, the injection hole 42a of the AE fluid sensor 42 is connected to the coolant tank 43, on the other hand, the detection portion 42b is connected to the AE sense amplifier 4 4°, as shown in Fig. 4, before the honing When the phase alignment of the spiral grinding wheel 14 with respect to the workpiece W is performed, the AE fluid sensor 42 is disposed at a contact angle from the spiral grinding wheel 14 and the workpiece W to the circumferential direction of the spiral grinding wheel 14 by 90°. The position of the phase constitutes a state in which the coolant C is sprayed toward the measurement position of the grinding wheel spindle 13 . That is, the AE fluid sensor 42 when the phase alignment with respect to the spiral grinding wheel 14 of the workpiece W is performed is configured to be shifted from the contact position of the spiral grinding wheel 14 and the workpiece W toward the circumferential direction of the spiral grinding wheel 14. In the direction of the 90° phase, the coolant C is sprayed toward the measurement position of the grinding wheel spindle 13 . Then, as long as the setting position of the AE fluid sensor 42 is shifted in that direction according to the right-hand or left-hand rotation of the workpiece W, even when the spiral wheel 14 and the workpiece W are engaged, even the grinding wheel head 1 1 ( The spiral grinding wheel 1 4) is spirally inclined 'the AE fluid sensor 42 does not interfere with the workpiece W. Further, as shown in Fig. 5, the AE fluid sensor 4 2 is disposed on the spiral grinding wheel when the phase alignment of the spiral grinding wheel 14 with respect to the dish trimming -9 - 201111076 is performed before trimming. The contact position between the first and fourth disc dressers 32 is shifted by 9 in the circumferential direction of the spiral grinding wheel 14 (the position of the Γ phase is configured to eject the coolant C from the state to the measurement position of the grinding wheel spindle 13 from this state. That is, the helium fluid sensor 42 at the time of phase alignment with respect to the spiral grinding wheel 14 of the dish dresser 32 is formed from the contact position of the spiral grinding wheel 14 and the dish dresser 32 toward the spiral The direction of the circumference of the grinding wheel 14 is shifted by the direction of the phase of 90°, and the coolant C is ejected toward the measurement position of the grinding wheel spindle 13, and then the coolant C supplied from the coolant tank 43 to the helium fluid sensor 42 is, for example, It is a honing oil whose cooling hydraulic pressure and injection flow rate are adjusted according to the distance between the helium fluid sensor 42 and the measurement position. That is, the helium fluid sensor 42 is the coolant C supplied from the coolant tank 43. , the injection position from the injection hole 42a to the measurement position of the grinding wheel spindle 13 Thereby, the generated helical grinding wheel 14 is elastically wave-transmitted, and the detected elastic wave C is detected by the detecting unit 42b, and then the detected elastic wave is input to the AE sense amplifier 44 by the AE signal. Next, as shown in FIG. The AE sense amplifier 44 converts the input AE signal into a voltage V and displays the voltage V at any time. Further, the gear grinding machine 1 is provided with an NC device (grinding wheel phase control means) 50. The NC device 50 is, for example, connected to a grinding wheel. The head 11, the rotary table 21, the dresser drive unit 31, the AE sense amplifier 44, and the like are configured to perform workpiece W honing control of the spiral grinding wheel 14 or to perform dish shape according to various basic conditions or processing conditions of the input workpiece. The spiral grinding wheel of the dresser 3 2 - 201111076 14 trimming control, and at the same time before the honing or trimming (tooth alignment), the first determination is based on the magnitude of the elastic wave detected by the AE fluid sensor 44. When the spiral grinding wheel 14 is in contact with and non-contact with the workpiece W or the dish dresser 32, the phase adjustment of the spiral grinding wheel 14 is performed. Therefore, when the workpiece W is honed by the spiral grinding wheel 14, first, As shown in Figure 2 It is shown that the spiral grinding wheel 14 is moved to the side of the workpiece W mounted on the rotary table 21. Secondly, before the engagement of the spiral grinding wheel 14 and the workpiece W is performed, it is preferable to perform the phase alignment of the large rafts first (thick phase The alignment is prevented from interfering with the tip of the helical grinding wheel 14 and the tip of the workpiece W. Then, in this coarse phase alignment state, while rotating the helical grinding wheel 14 and the workpiece W, the AE fluid sensor 42 is simultaneously rotated. The injection hole 42 a injects the coolant C toward the measurement position of the grinding wheel spindle 13 , and the detection portion 4 2 b starts detecting the elastic wave of the spiral grinding wheel 14 . As described above, when the AE fluid sensor 42 starts detecting the elastic wave, as shown in FIG. 6, the AE sense amplifier 44 converts the input AE signal into a voltage V, and displays the voltage while passing the time. Variety. Further, while the AE fluid sensor 42 starts detecting the elastic wave, the voltage V is measured at the maximum voltage Vf when the spiral grinding wheel 14 is not in contact, and a critical 値Vo larger than the voltage Vf is automatically set. This critical enthalpy Vo is used when the contact determination of the spiral grinding wheel 14 described below is performed. Next, as long as the rotational speed (rotation speed) of the workpiece W is increased, the spiral rotation of the spiral grinding wheel 14 and the workpiece W is shifted, and the tooth surface of the workpiece W is brought into contact with the blade surface of the spiral grinding wheel 14 . In this way, the elastic wave of the spiral grinding wheel 14 generated by the contact is transmitted to the wheel center -11 - 201111076 shaft 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is transmitted through the coolant C by the AE fluid sensation. The detector 42 detects it. At this time, as shown in FIG. 6, the AE sense amplifier 44 changes the waveform of the voltage V according to the input AE signal. When the voltage V (Vf) exceeds the preset threshold 値Vo, the NC device 50 determines. The workpiece W has contacted the spiral grinding wheel 14 and the phase of the spiral grinding wheel 14 is memorized. Further, by reducing the rotational speed (rotational speed) of the workpiece W, the synchronous rotation of the spiral grinding wheel 14 and the workpiece W is shifted, and the other tooth surface of the workpiece W is brought into contact with the other blade surface of the spiral grinding wheel 14. As a result, the elastic wave of the spiral grinding wheel 14 generated by the contact is transmitted to the grinding wheel spindle 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is detected by the AE fluid sensor 42 through the cooling liquid C. come out. At this time, as shown in the figure, the ΑΕ sense amplifier 44 changes the waveform of the voltage V according to the input sigma signal. When the voltage V(Vf) exceeds the preset threshold 値V〇, the NC device 50 will It is determined that the workpiece W has been in contact with the spiral grinding wheel 1 4 'the spiral grinding wheel 4 phase at this time. Next, the NC device 50 calculates the phase of the intermediate spiral phase from the phase of the two helical grinding wheels 14 stored, and then positions the phase of the helical grinding wheel 14 at the intermediate phase, thereby enabling precise phase alignment. (Precision phase alignment). Then, in the precise phase alignment state 'the spiral grinding wheel 14 is engaged with the workpiece W, and then the synchronous rotation is performed', the blade surface of the spiral grinding wheel 14 can be honed to the tooth surface of the workpiece W. Here, when the specified number of workpieces W are honed using the spiral grinding wheel 14, the surface of the workpiece W is worn to cause the honing efficiency to decrease. Therefore, it is necessary to periodically perform the spiral grinding wheel 14 from the -12-201111076 dish-shaped dresser 32. Trimming. Then, when the spiral dressing wheel 14 is trimmed by the dish dresser 32, first, as shown in Fig. 1, after the spiral grinding wheel 14 is moved to the side of the dish dresser 32, before the occlusion, It is preferred to perform such large 槪 phase alignment (coarse phase alignment) to avoid interference between the tip of the spiral grinding wheel 14 and the tip of the dish dresser 32. Then, in the state of the coarse phase alignment, while the spiral dressing wheel 14 is stopped, the disc dresser 32 is rotated, and the measurement position from the injection hole 42a of the AE fluid sensor 42 toward the grinding wheel spindle 13 is performed. The coolant C is sprayed, and the detecting portion 42b starts the elastic wave detection of the spiral grinding wheel 14. As described above, when the AE fluid sensor 42 starts detecting the elastic wave, as shown in FIG. 6, the AE sense amplifier 44 converts the input AE signal into a voltage V, and displays the voltage while passing the time. Variety. In addition, while the AE fluid sensor 42 starts detecting the elastic wave, the voltage V is measured by the maximum voltage Vf when the spiral grinding wheel 14 is not in contact, and is automatically set to have a threshold 値Vo greater than the voltage Vf. . This critical enthalpy Vo is used when the contact determination of the spiral grinding wheel 14 described below is performed. Next, the spiral grinding wheel 14 is rotated forward so that one of the blade faces contacts the blade face of the dish dresser 32. As a result, the elastic wave of the spiral grinding wheel 14 generated by the contact is transmitted to the grinding wheel spindle 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is detected by the AE fluid sensor 42 through the cooling liquid c. come out. At this time, as shown in FIG. 6, the AE sense amplifier 44 changes the waveform of the voltage V according to the input AE signal. When the voltage V(Vf) exceeds the threshold 値Vo set in advance, the NC device 50 determines - 13- 201111076 The spiral grinding wheel 14 has contacted the dish dresser 32, and the phase of the spiral wheel 14 is memorized. Next, the spiral grinding wheel 14 is reversed so that the other blade surface touches the other blade surface of the dish dresser 32. As a result, the elastic wave passing through the contacted spiral grinding wheel 14 is transmitted to the grinding wheel spindle 13 , and the elastic wave transmitted to the grinding wheel spindle 13 is detected by the AE flow sensor 42 through the cooling liquid C. At this time, as shown in FIG. 6, the AE senser 44 changes the waveform of the voltage V according to the input AE signal. When the pressure V(Vf) exceeds the preset threshold 値Vo, the NC device 50 determines the spiral. The grinding wheel 14 has contacted the dish dresser 32, and the phase of the rotating grinding wheel 14 is memorized. Next, after the NC device 50 calculates the intermediate phase from the two helical grinding wheels 14 stored therein, the phase of the spiral grinding wheel is positioned at the intermediate phase, whereby the phase pair can be precisely performed (precision phase alignment). Next, in the precise phase alignment state, the spiral grinding wheel 14 is engaged with the dish dresser 32, and then the disc dresser is rotated to enable the blade surface of the dish dresser 32 to trim the blade of the spiral grinding wheel 14 The embodiment is a workpiece W using an internal gear material, but a workpiece W of an external gear material may also be used. In addition, the voltage threshold used for the contact determination between the spiral grinding wheel 14 and the workpiece or the dish dresser 32 is a common threshold 値Vo, but different 値 can also be used, and the critical 値 can be used according to each material. Or processing conditions, etc. are set. Therefore, the phase of the spiral grinding wheel according to the present invention is aligned with the sand to produce the large electric power, and the screw phase 14 is the same as the 匮-14-201111076, and the spiral is honed or trimmed. Before the engagement of the grinding wheel 14 with the workpiece W or the dish dresser 32, the spiral grinding wheel 14 is supported to rotate when the phase of the spiral grinding wheel 14 is aligned with respect to the workpiece W or the dish dresser 32. The AE fluid sensor 42 disposed on the grinding wheel head 1 1 detects whether the spiral grinding wheel 14 has contacted the workpiece W or the dish dresser 32, and according to the phase of the spiral grinding wheel 14 when the contact is detected, The helical grinding wheel 14 is positioned in a phase that is engageable. In this way, the phase alignment of the spiral grinding wheel 14 with respect to the workpiece W or the dish dresser 32 can be precisely performed with a simple configuration. [Industrial Applicability] The present invention is a gear grinding machine which can be applied to a short non-processing time. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the configuration of a phase alignment device for a spiral grinding wheel according to an embodiment of the present invention, and showing a state in which a spiral dressing wheel is trimmed by a dish dresser. Fig. 2 is a view showing a state in which a workpiece is honed by a spiral grinding wheel. Fig. 3 is a view showing the mounting structure of the ae fluid sensor. Fig. 4 is a view showing the arrangement position of the a-fluid sensor with respect to the spiral grinding wheel at the time of honing. Fig. 5 is a view showing the arrangement position of the AE fluid sensor with respect to the spiral grinding wheel at the time of trimming. -15- 201111076 Figure 6 is a graph showing the voltage change when the AE fluid sensor detects the elastic wave of the spiral grinding wheel. [Description of main component symbols] 1 : Gear grinding machine 1 1 : Grinding wheel head 12 : Main shaft 1 3 : Grinding wheel spindle 1 4 : Spiral grinding wheel 2 1 : Rotating table 3 1 : Dresser driving part 3 2 : Dish dresser 41 : bracket 42 : AE fluid sensor 42 a : injection hole 42 b : detection portion 43 : coolant tank 44 : AE sense amplifier 50 : NC device W : workpiece C : coolant V : measurement voltage
Vo :電壓臨界値Vo: voltage critical 値
Vf:非接觸時的最大電壓 -16-Vf: maximum voltage at non-contact -16-