六、發明說明： 【發明所屬之技術領域】 本發明是關於在修整時螺旋狀砂輪和工件或碟形修整 器的咬合之前，先進行螺旋狀砂輪相對於碟形修整器之相 位對準的螺旋狀砂輪之相位對準方法及相位對準裝置。 【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 位對準的方法，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- 1 3 8438號公報 【發明內容】 [發明欲解決之課題] 上述先前的相位對準方法是將砂輪在工件上朝其軸方 ί S3 -5- 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，上述先前的 方法，對於砂輪是否接觸工件的檢測只是一瞬間，因此難 以獲得良好的精度檢測。 另外，齒輪磨床，是使用由修整器修整後的砂輪對工 件進行硏磨，因此不僅在硏磨時砂輪和工件的相位對準， 即使是在修整時砂輪和修整器的相位對準，都會有上述同 樣的問題產生。 因此，本發明是爲了解決上述課題所硏創的發明，目 的是提供一種可高精度檢測出螺旋狀砂輪的接觸及非接觸 ，能夠精密進行螺旋狀砂輪相位對準的螺旋狀砂輪之相位 對準方法及相位對準裝置。 [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 位對準方法， 是一種修整時在進行螺旋狀砂輪和修整器的咬合之前 ’先進行上述螺旋狀砂輪相對於上述修整器之相位對準的 螺旋狀砂輪之相位對準方法，其特徵爲： 將上述螺旋狀砂輪朝一方向旋轉， 對上述螺旋狀砂輪一方刃面接觸到上述修整器一方刃 面時產生的彈性波進行檢測， -6- 當上述螺旋狀砂輪已接觸到上述修整器，但其彈性波 所對應的一方向側測定値未超過指定値時，就提高上述修 整器的旋轉數直到上述一方向側測定値超過上述指定値， 對上述一方向側測定値超過上述指定値時的上述螺旋 狀砂輪的一方向側相位進行記億， 接著將上述螺旋狀砂輪朝另一方向旋轉， 對上述螺旋狀砂輪另一方刃面接觸到上述修整器另一 方刃面時產生的彈性波進行檢測， 當上述螺旋狀砂輪已接觸到上述修整器，但其彈性波 所對應的另一方向側測定値未超過上述指定値時，就提高 上述修整器的旋轉數直到上述另一方向側測定値超過上述 指定値， 對上述另一方向側測定値超過上述指定値時的上述螺 旋狀砂輪的另一方向側相位進行記憶， 根據上述螺旋狀砂輪的上述一方向側相位及另一方向 側相位，使該上述螺旋狀砂輪定位在可咬合的相位。 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， 是一種修整時在進行螺旋狀砂輪和修整器的咬合之前 ’先進行上述螺旋狀砂輪相對於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： 可對上述螺旋狀砂輪旋轉接觸到上述修整器時所產生 的彈性波進行檢測的檢測手段； 當上述檢測手段檢測出的彈性波其對應的測定値超過 指定値時，就判定上述螺旋狀砂輪已經接觸上述修整器的 判定手段； 當上述螺旋狀砂輪接觸上述修整器，並且，上述測定 値未超過上述指定値時，可設定上述修整器的旋轉數使上 述測定値超過上述指定値的修整器旋轉數設定手段：及 根據上述判定手段判定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3發明相關的螺旋狀砂輪之相 位對準裝置，其特徵爲： 上述修整器旋轉數設定手段是階段性提高上述修整器 的旋轉數。 [發明效果] 根據本發明相關的螺旋狀砂輪之相位對準方法及相位 對準裝置時，根據接觸到修整器時的螺旋狀砂輪彈性波所 對應的測定値，判定螺旋狀砂輪是否已經接觸修整器，當 螺旋狀砂輪接觸修整器但測定値未超過指定値時，提高修 整器的旋轉數’藉此就能夠高精度檢測出螺旋狀砂輪的接 觸及非接觸，能夠精密進行螺旋狀砂輪相對於修整器的相 位對準。 【實施方式】 [發明之最佳實施形態] -8 - 以下，使用圖面對本發明相關的螺旋狀砂輪之相位對 準方法及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1 ’如第2圖所示利用桶形的螺旋狀砂輪1 4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1 3的前端可裝脫地安裝有螺旋狀砂輪1 4。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1 1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 31，該修整器驅動部31安裝有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 32 ° 砂輪頭11的前端面，透過托座41支撐有聲發射方式 9 - 的 AE( Acoustic Emission)流體感測器（檢測手段） 。該AE流體感測器42是透過所噴射的流體檢測出材料 產生的振動或磨擦等造成的彈性波，將該彈性波以AE 號進行處理，其具有：可將做爲流體的冷卻液C噴射在 輪心軸1 3指定測定位置的噴射孔42a ;及從該測定位置 經由冷卻液C所傳播的彈性波進行檢測的檢測部42b。 加上，AE流體感測器42的噴射孔42a連接有冷卻液箱 ，另一方面其檢測部42b連接有AE感測放大器44。 另，從冷卻液箱43供應至AE流體感測器42的冷 液C，例如是硏磨油，其冷卻液壓及噴射流量是可根 AE流體感測器42和測定位置之間的距離進行調整。 即，AE流體感測器42是將冷卻液箱43所供應的 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的彈性波，透過冷卻液C 檢測部42b檢測出之後，將該所檢測的彈性波以AE訊 輸入至AE感測放大器44。其次，如第4圖所示，AE 測放大器44是將輸入的AE訊號轉換成電壓（測定値） ，隨時顯示該電壓V。 另外’齒輪磨床1設有NC裝置（判定手段、修整 旋轉數設定手段、砂輪相位控制手段）50。該NC裝置 ’例如是連接在砂輪頭11、旋轉平台21、修整器驅動 31、AE感測放大器44等，構成爲根據輸入的工件各種 本條件或加工條件，進行螺旋狀砂輪1 4的工件W硏磨 制’或進行碟形修整器3 2的螺旋狀砂輪1 4修整控制， 42 中 訊 砂 對 再 43 卻 據 冷 > 由 號 感 V 器 50 部 基 控 同 -10- 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42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14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內。其次，在螺旋狀砂輪14移動至 工件W側之後，在進行螺旋狀砂輪1 4和工件W的咬合之 前，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1 4和工件W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4U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4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，只要透過提高工件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 — 方的齒面接觸螺旋狀砂輪14 一方的刃面。如此一來，經[s] -11 - 201111111 由接觸產生的螺旋狀砂輪14的彈性波就會傳達至砂輪心 軸13’該傳達至砂輪心軸13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4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就會判定工件W已接觸螺旋狀砂輪14，對此時的螺 旋狀砂輪1 4相位進行記憶》 另外反之，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14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4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就會判定工件W已接觸螺旋狀砂輪14, 對此時的螺旋狀砂輪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14對指定數量的工件w進 -12- 行硏磨時’其刃面會磨損導致硏磨效率降低，因此需要由 碟形修整器3 2定期進行螺旋狀砂輪1 4的修整。 於是，以碟形修整器3 2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，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的刀尖和碟形 修整器3 2的刀尖彼此干涉。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3 2 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。 另，此時的碟形修整器32的旋轉數N是設定成在螺 旋狀砂輪1 4接觸時作業員能夠確認其接觸音程度的最低 旋轉數和螺旋狀砂輪1 4接觸時該螺旋狀砂輪1 4或碟形修 整器3 2不破損程度的最大旋轉數之間的中間値。 如上述，當AE流體感測器42開始檢測彈性波時，如 第4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（測定値）Vo。該 臨界値Vo是在進行下述螺旋狀砂輪1 4的接觸判定時使用 〇 接著，將螺旋狀砂輪14正轉，使其一方的刃面接觸 -13- 碟形修整器32 —方的刃面。如此一來，經由接觸產生 螺旋狀砂輪14的彈性波就會傳達至砂輪心軸13，該傳 至砂輪心軸1 3的彈性波是透過冷卻液C由AE流體感 器42檢測出來。此時，如第4圖所示，AE感測放大器 是根據輸入的AE訊號改變電壓V的波形，當該電壓（ 方向側測定値）V超過事先設定的臨界値Vo時，NC裝 50就會判定螺旋狀砂輪14已接觸碟形修整器32，對此 的螺旋狀砂輪1 4相位（一方向側相位）進行記億。 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32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4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（另一方向側測定値）V超過事先設定的臨界値Vo ，NC裝置50就會判定螺旋狀砂輪14已接觸碟形修整 32，對此時的螺旋狀砂輪1 4相位（另一方向側相位） 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，值 旋狀砂輪1 4咬合碟形修整器3 2，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序 的 達 測 44 置 時 接 產 該 體 大 電 時 器 進 相 14 準 螺 32 刃 -14 - 201111111 面。 另，本實施例中，採用內齒輪素材的工件W，但也可 採用外齒輪素材的工件W。此外，螺旋狀砂輪1 4和工件 W或碟形修整器32的接觸判定所使用的電壓臨界値是共 同的臨界値 Vo，但也可使用各不相同値的臨界値，該等 臨界値是可根據各材質或加工條件等加以設定。 於此，如上述，在螺旋狀砂輪1 4正轉及逆轉造成的 其與碟形修整器32的接觸時，並不拘螺旋狀砂輪14已接 觸碟形修整器3 2，當經過指定時間但電壓V還是未超過 臨界値Vo時，就由NC裝置50控制提高碟形修整器32 的旋轉數N。即，如第4圖的點線所示，當所測定的電壓 V超過非接觸時的最大電壓Vf時，並且，在臨界値Vo以 下時，就以一定的比率階段性提高碟形修整器3 2的旋轉 數N(參照第5圖）直到該電壓V超過臨界値Vo，強制 地使螺旋狀砂輪1 4的彈性波變大。如此一來，就能夠提 昇AE流體感測器42的檢測感度，能夠確實執行螺旋狀砂 輪1 4的接觸判定。 接著，此時的碟形修整器3 2的旋轉數N的階段性設 定方法，如第5圖實線所示，其增比率是可爲一定的比率 ，但也可改變其增加比率，例如該圖點線所示，也可慢慢 變小其增加比率。 其次，使用第6圖對上述NC裝置50的碟形修整器 32旋轉數設定處理進行說明。 首先，步驟S1是對螺旋狀砂輪14非接觸時的最大電 -15- 壓Vf進行測定，其次，步驟S2是將螺旋狀砂輪14接觸 判定用的臨界値Vo設定成比步驟S 1所測定的最大電壓 Vf還大的値。 接著，將在螺旋狀砂輪14接觸時作業員能夠確認其 接觸音程度的最低旋轉數和螺旋狀砂輪14接觸時該螺旋 狀砂輪1 4不破損程度的最大旋轉數之間的中間値，設定 成碟形修整器32的旋轉數N，其次，步驟S4是開始進行 螺旋狀砂輪1 4相對於碟形修整器32的相位對準。 然後，步驟S5是對螺旋狀砂輪14是否已經接觸碟形 修整器32進行判定。於此，若判定爲是時，則步驟S6是 持續進行螺旋狀砂輪1 4的相位對準，在步驟7結束該相 位對準。此外，若判定爲否時，則是在步驟8提高碟形修 整器32旋轉數N，接著，回到步驟S5。 因此，根據本發明相關的螺旋狀砂輪之相位對準方法 及相位對準裝置時，在修整時螺旋狀砂輪1 4和碟形修整 器32的咬合之前，先在進行螺旋狀砂輪14相對於碟形修 整器3 2的相位對準時，根據螺旋狀砂輪1 4接觸到碟形修 整器3 2時的彈性波所對應的電壓V，判定螺旋狀砂輪1 4 是否已接觸碟形修整器32，當螺旋狀砂輪14已接觸到碟 形修整器32但電壓V未超過臨界値Vo時，就提高碟形 修整器32的旋轉數強制性判定接觸，根據此時的螺旋狀 砂輪1 4相位，使該螺旋狀砂輪1 4定位在可咬合的中間相 位。如此一來，就可高精度檢測出螺旋狀砂輪的接觸及非 接觸，能夠精密進行螺旋狀砂輪14相對於碟形修整器32 -16- 的相位對準。 [產業上之可利用性] 本發明是可應用在縮短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 準裝置的槪略構成圖，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A E流體感測器檢測出螺旋狀砂輪彈性 波時的電壓變化圖。 第5圖爲表示修整器的旋轉數變化圖。 第6圖爲進行螺旋狀砂輪相對於修整器之相位對準時 的流程圖。 【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 -17- 21 :旋轉平台 3 1 :修整器驅動部 32 :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 V 〇 :電壓臨界値6. Description of the Invention: [Technical Field] The present invention relates to a spiral in which the phase of a spiral grinding wheel is aligned with respect to a dish dresser prior to splicing of a spiral grinding wheel and a workpiece or a dish dresser during trimming Phase alignment method and phase alignment device of the grinding wheel. [Prior Art] Conventionally, a gear grinding machine that can perform a honing process using a honing tool, that is, a grinding wheel, is used to efficiently machine a tooth surface of a trimming 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 method of 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. Hei. No. Hei. No. Hei. No. Hei. No. Hei. -5- sliding, the contact moment and 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 is opposed to the workpiece in the middle position of the thread groove calculated according to the detection result Move in the direction of its axis, thereby performing phase alignment of the grinding wheel and the workpiece. However, the above previous method, for the detection of whether the grinding wheel is in contact with the workpiece, is only a moment, so it is difficult to obtain good accuracy detection. In addition, the gear grinding machine uses the grinding wheel trimmed by the dresser to honing the workpiece, so that not only the phase alignment of the grinding wheel and the workpiece during the honing process, but even the phase alignment of the grinding wheel and the dresser during trimming, there will be The same problem as mentioned above arises. Accordingly, the present invention has been made to solve the above problems, and an object thereof is to provide a phase alignment of a spiral grinding wheel capable of accurately detecting contact and non-contact of a spiral grinding wheel and precisely performing phase alignment of a spiral grinding wheel. Method and phase alignment device. [Means for Solving the Problem] The phase alignment method of the spiral grinding wheel according to the first aspect of the present invention is to perform the above-mentioned spiral grinding wheel before the splicing of the spiral grinding wheel and the dresser at the time of trimming a phase alignment method for a spiral grinding wheel aligned with respect to a phase of the dresser, wherein: the spiral grinding wheel is rotated in one direction, and a side surface of the spiral grinding wheel is brought into contact with a blade surface of the dresser The elastic wave is detected, -6- when the spiral grinding wheel has contacted the dresser, but the one-direction side corresponding to the elastic wave does not exceed the specified 値, the number of rotations of the dresser is increased until the above one The direction side measurement 値 exceeds the above-mentioned designation, and the phase of the one-direction side of the spiral grinding wheel when the one-direction side measurement 値 exceeds the predetermined 値 is performed, and the spiral grinding wheel is rotated in the other direction. The elastic wave generated when the other blade surface of the grinding wheel contacts the other blade surface of the dresser is detected. The dressing wheel has contacted the dresser, but when the other side of the elastic wave corresponding to the elastic wave does not exceed the specified 値, the number of rotations of the dresser is increased until the other side is measured and exceeds the specified 値, The phase of the other direction side of the spiral grinding wheel when the other direction side measurement 値 exceeds the predetermined 値 is stored, and the spiral shape is made based on the one-direction side phase and the other-direction side phase of the spiral grinding wheel. The grinding wheel is positioned in a phase that can be engaged. A phase alignment device for a spiral grinding wheel according to a second aspect of the present invention is a phase alignment of the spiral grinding wheel with respect to the dresser before trimming of the spiral grinding wheel and the dresser. A phase alignment device for a quasi-spiral grinding wheel, comprising: a detecting means capable of detecting an elastic wave generated when the spiral grinding wheel is in rotational contact with the dresser; and an elastic wave detected by the detecting means When the corresponding measurement 値 exceeds the specified 値, the determination means that the spiral grinding wheel has contacted the dresser is determined; when the spiral grinding wheel contacts the trimmer, and the measurement 値 does not exceed the specified 値, the above may be set The number of rotations of the dresser is such that the above-described measurement 値 exceeds the specified number of dresser rotation number setting means: and the phase of the spiral grinding wheel at the time of contact is determined according to the above-described determination means. The spiral grinding wheel is positioned at the occludable phase of the grinding wheel Phase control means. In the phase alignment device for a spiral grinding wheel according to the third aspect of the invention, the device for adjusting the number of rotations of the dresser is to gradually increase the number of rotations of the dresser. [Effect of the Invention] According to the phase alignment method and the phase alignment device of the spiral grinding wheel according to the present invention, it is determined whether or not the spiral grinding wheel has been touched and trimmed according to the measurement flaw corresponding to the elastic wave of the spiral grinding wheel when the trimmer is touched. When the spiral grinding wheel contacts the dresser but the measured 値 does not exceed the specified 値, the number of rotations of the dresser is increased', whereby the contact and non-contact of the spiral grinding wheel can be detected with high precision, and the spiral grinding wheel can be precisely performed with respect to The phase alignment of the trimmer. [Embodiment] [Best Embodiment of the Invention] -8 - Hereinafter, a phase alignment method and a phase alignment device of a spiral grinding wheel according to the present invention will be described in detail with reference to the drawings. [Embodiment] A gear grinding machine 1' to which the phase alignment device for a spiral grinding wheel according to the present invention is applied is shown as a drawing of a workpiece (machined gear) W of an internal gear material by a barrel-shaped spiral grinding wheel 14 as shown in Fig. 2 . The grinding, in addition, as shown in Fig. 1, has a trimming function that can be used to trim the spiral grinding wheel 14 by the dish dresser 32. As shown in Figs. 1 to 3, the gear grinding machine 1 is supported by a movable and rotatable grinding wheel head 11. The grinding wheel head 11 rotatably supports a main shaft 12, and a front end of the main shaft 12 is formed with a grinding wheel spindle 13. Next, a spiral grinding wheel 14 is detachably attached to the front end of the grinding wheel spindle 13. That is, by driving the grinding wheel head 1 1, the spiral grinding wheel 14 can be rotationally driven through the grinding wheel spindle 13 of the main shaft 12. A rotating platform 21 is rotatably supported on the front surface of the grinding wheel head 1 1. The upper surface of the rotating platform 21 is detachably attached to the workpiece W through a mounting fixture (not shown). Namely, by driving the rotary stage 21, the workpiece W can be rotationally driven. On the side of the rotary table 21, a dresser driving portion 31 is movably supported, and the dresser driving portion 31 is mounted with a detachable dish dresser 32. That is, by driving the dresser driving portion 31, the front end surface of the 32° grinding wheel head 11 of the dish dresser can be rotationally driven, and an AE (Acoustic Emission) fluid sensor with acoustic emission pattern 9 - is supported through the bracket 41 (detection Means). The AE fluid sensor 42 is an elastic wave caused by vibration or friction generated by the material detected by the injected fluid, and the elastic wave is treated by the AE number, and has a coolant C which can be used as a fluid. The injection hole 42a at the measurement position is designated at the wheel spindle 13 and the detection portion 42b is detected by the elastic wave propagated from the measurement position via the coolant C. Further, the injection hole 42a of the AE fluid sensor 42 is connected to the coolant tank, and on the other hand, the detection portion 42b is connected to the AE sense amplifier 44. Further, the cold liquid C supplied from the coolant tank 43 to the AE fluid sensor 42, for example, honing oil whose cooling hydraulic pressure and injection flow rate are adjusted by the distance between the root AE fluid sensor 42 and the measurement position . That is, the AE fluid sensor 42 is a measurement position at which the liquid C' supplied from the coolant tank 43 is ejected from the injection hole 42a to the grinding wheel spindle 13 so that the elastic wave of the generated spiral grinding wheel 14 is transmitted and cooled. After the liquid C detecting unit 42b detects the detected elastic wave, it inputs the AE signal to the AE sense amplifier 44. Next, as shown in Fig. 4, the AE amp 44 converts the input AE signal into a voltage (measurement 値), and displays the voltage V at any time. Further, the gear grinding machine 1 is provided with an NC device (determination means, trimming rotation number setting means, grinding wheel phase control means) 50. The NC device 'is connected, for example, to the grinding wheel head 11, the rotary table 21, the dresser drive 31, the AE sense amplifier 44, and the like, and is configured to perform the workpiece W of the spiral grinding wheel 14 according to various conditions or processing conditions of the input workpiece.硏 制 ' or the disc-shaped dresser 3 2 of the spiral grinding wheel 1 4 trim control, 42 Zhongxun sand to 43 but according to the cold> by the sense of V 50 base control with -10- when in the above 硏Prior to the occlusion (tooth alignment) during grinding or dressing, the contact and non-contact of the spiral grinding wheel 14 and the workpiece W or the dish dresser 32 are determined based on the magnitude of the elastic wave detected by the AE fluid sensor 42. 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 Fig. 2, the spiral grinding wheel 14 is moved to the workpiece W attached to the rotary table 21. Next, after the spiral grinding wheel 14 is moved to the workpiece W side, the large-diameter phase alignment (coarse phase alignment) is performed to avoid the spiral grinding wheel 14 before the helical grinding wheel 14 and the workpiece W are engaged. The tip of the blade and the tip of the workpiece W interfere with each other. Then, in the coarse phase alignment state, while rotating the spiral grinding wheel 14 and the workpiece W, the coolant C is ejected from the injection hole 42a of the AE fluid sensor 42 toward the measurement position of the grinding wheel spindle 13 The detecting unit 4U 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. 4, 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, as long as the rotation 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. As a result, the elastic wave of the spiral grinding wheel 14 generated by the contact [s] -11 - 201111111 is transmitted to the grinding wheel spindle 13'. The elastic wave transmitted to the grinding wheel spindle 13 is transmitted through the cooling fluid C by the AE fluid. The sensor 42 detects it. At this time, as shown in FIG. 4, 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 in this case. On the other hand, as long as the rotation speed (rotation speed) of the workpiece W is lowered, the synchronous rotation of the spiral grinding wheel 14 and the workpiece W is shifted. The other tooth surface of the workpiece W contacts 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. . At this time, as shown in FIG. 4, 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. Next, after the NC device 50 calculates the intermediate phase from the phase of the two spiral grinding wheels 14 stored, the phase of the spiral grinding wheel 14 is positioned at the intermediate phase, whereby phase alignment can be precisely performed ( 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 to make the blade surface of the spiral grinding wheel 14 honing the tooth surface of the workpiece W. Here, when the spiral grinding wheel 14 is used for honing the specified number of workpieces w, the surface of the workpiece is worn and the honing efficiency is lowered, so that the spiral grinding wheel 1 is periodically performed by the dish dresser 32. 4 trimming. Then, when the spiral dressing wheel 13 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, These large 槪 phase alignment (coarse phase alignment) is first performed to prevent the tip of the spiral grinding wheel 14 and the tip of the dish dresser 32 from interfering with each other. Then, in the state of the coarse phase alignment, the rotation of the spiral dresser 14 is stopped, and the rotation of the dish dresser 3 2 is performed from the injection hole 42a of the AE fluid sensor 42 toward the grinding wheel spindle 13 The position injection coolant C starts the elastic wave detection of the spiral grinding wheel 14 by the detecting portion 42b. Further, the number N of rotations of the dish dresser 32 at this time is set to a minimum number of rotations at which the operator can confirm the degree of contact sound when the spiral grinding wheel 14 comes into contact with the spiral grinding wheel 1 when the spiral grinding wheel 14 comes into contact. 4 or the middle of the disc-shaped dresser 3 2 between the maximum number of rotations without damage. As described above, when the AE fluid sensor 42 starts detecting the elastic wave, as shown in FIG. 4, 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 the threshold 値 which is larger than the voltage Vf is automatically set (determination)値) Vo. The critical enthalpy Vo is used when the contact determination of the spiral grinding wheel 14 described below is performed. Then, the spiral grinding wheel 14 is rotated forward, and one blade surface is brought into contact with the blade surface of the 13-disc dresser 32. . As a result, the elastic wave generated by the contact of the 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 fluid sensor 42 through the cooling liquid C. At this time, as shown in Fig. 4, the AE sense amplifier changes the waveform of the voltage V according to the input AE signal. When the voltage (direction side measurement 値) V exceeds the preset threshold 値Vo, the NC device 50 will It is determined that the spiral grinding wheel 14 has contacted the dish dresser 32, and the phase of the spiral grinding wheel 14 (one phase of the direction side) is counted. 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. 4, the AE senser 44 changes the waveform of the voltage V according to the input AE signal, and when the pressure (the other direction side measurement 値) V exceeds the preset threshold 値Vo, the NC device 50, it is judged that the spiral grinding wheel 14 has contacted the dish trimming 32, and the spiral grinding wheel 14 phase (the other direction side phase) 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). Secondly, in the precise phase alignment state, the value of the spiral grinding wheel 14 is engaged with the dish dresser 32, and then the disc dresser is rotated, so that the blade surface of the dish dresser 32 can be trimmed by the spiral grinding wheel 14 Measure 44 when the production of the body of the electric timer into the phase 14 quasi-screw 32 edge -1411111 face. Further, in the present embodiment, the workpiece W of the internal gear material is used, but the workpiece W of the external gear material may be used. Further, the voltage threshold used for the contact determination of the spiral grinding wheel 14 and the workpiece W or the dish dresser 32 is a common critical value 値Vo, but a critical enthalpy of different enthalpy is also used, and the critical enthalpy is Set according to each material or processing conditions. Here, as described above, when the spiral grinding wheel 14 is rotated forward and reversed by its contact with the dish dresser 32, the spiral grinding wheel 14 is not in contact with the dish dresser 32, and the voltage is applied for a specified time. When V does not exceed the critical value 値Vo, the NC device 50 controls the number of rotations N of the dish dresser 32 to be increased. That is, as shown by the dotted line in Fig. 4, when the measured voltage V exceeds the maximum voltage Vf at the time of non-contact, and, when it is below the critical value 値Vo, the dish dresser 3 is stepwisely increased at a certain ratio. The number of rotations N of 2 (see Fig. 5) until the voltage V exceeds the critical value 値Vo, forcibly increases the elastic wave of the spiral grinding wheel 14. As a result, the detection sensitivity of the AE fluid sensor 42 can be improved, and the contact determination of the spiral grinding wheel 14 can be surely performed. Next, the stepwise setting method of the number of rotations N of the dish dresser 32 at this time is as shown by the solid line in FIG. 5, and the increase ratio may be a certain ratio, but the increase ratio may be changed, for example, As shown by the dotted line, it can also be gradually reduced to increase its ratio. Next, the disk shape setting process of the disk shaper 32 of the NC device 50 will be described with reference to Fig. 6. First, in step S1, the maximum electric -15-pressure Vf when the spiral grinding wheel 14 is not in contact is measured. Next, in step S2, the critical enthalpy Vo for determining the contact of the spiral grinding wheel 14 is set to be larger than that measured in step S1. The maximum voltage Vf is still large. Next, when the spiral grinding wheel 14 is in contact with each other, the operator can confirm that the minimum number of rotations of the contact sound level and the maximum number of rotations of the spiral grinding wheel 14 when the spiral grinding wheel 14 is in contact with each other are set to The number of rotations of the dish dresser 32 is N, and secondly, step S4 is to start the phase alignment of the spiral grinding wheel 14 with respect to the dish dresser 32. Then, step S5 is a determination as to whether or not the spiral grinding wheel 14 has contacted the dish dresser 32. Here, if the determination is YES, the step S6 is to continue the phase alignment of the spiral grinding wheel 14, and the phase alignment is completed in step 7. Further, if the determination is negative, the number of rotations of the dish conditioner 32 is increased in step S8, and the flow returns to step S5. Therefore, according to the phase alignment method and the phase alignment device of the spiral grinding wheel according to the present invention, before the splicing of the spiral grinding wheel 14 and the dish dresser 32 during trimming, the spiral grinding wheel 14 is first opposed to the dish. When the phase of the shape dresser 32 is aligned, it is determined whether the spiral grinding wheel 1 4 has contacted the dish dresser 32 according to the voltage V corresponding to the elastic wave when the spiral grinding wheel 14 contacts the dish dresser 32. When the spiral grinding wheel 14 has contacted the dish dresser 32 but the voltage V does not exceed the critical value 値Vo, the number of rotations of the dish dresser 32 is increased to forcibly determine the contact, and according to the phase of the spiral grinding wheel 14 at this time, The helical grinding wheel 14 is positioned in the intermediate phase that can be engaged. In this way, the contact and non-contact of the spiral grinding wheel can be detected with high precision, and the phase alignment of the spiral grinding wheel 14 with respect to the dish dresser 32-16- can be precisely performed. [Industrial Applicability] The present invention is a gear grinding machine that can be applied to shorten non-machining 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, 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 graph showing voltage changes when the A E fluid sensor detects the elastic wave of the spiral grinding wheel. Fig. 5 is a graph showing the change in the number of revolutions of the dresser. Figure 6 is a flow chart showing the phase alignment of the spiral grinding wheel with respect to the dresser. [Main component symbol description] 1 : Gear grinding machine 1 1 : Grinding wheel head 12 : Main shaft 1 3 : Grinding wheel spindle 1 4 : Spiral grinding wheel -17- 21 : Rotating platform 3 1 : Dresser driving part 32 : Dish dresser 41: bracket 42: AE fluid sensor 42a: injection hole 42b: detecting portion 43: coolant tank 44: AE sense amplifier 50: NC device W: workpiece C: coolant V: measured voltage V 〇: voltage critical value
Vf :非接觸時的最大電壓 -18-Vf : maximum voltage at non-contact -18-