200418633 Π) 玖、發明說明 【發明所屬之技術領域】200418633 Π) 发明, description of the invention [Technical field to which the invention belongs]
本發明，是關於電動壓製加工機，特別是關於用安裝 在往返運動的滑件下端的上模和安裝在機床的下模，以馬 達爲驅動源進行壓製加工的電動壓製加工機中，在位於上 限待機位置的上模下降至接觸下模所載置的被加工物爲止 的期間或正要接觸的期間，及上模從下限位置上昇回到上 限待機位置爲止的期間的各時間以高速進行上模移動，使 壓製的一工序（加工循環期）得以縮短的電動壓製加工 機。 【先前技術】The present invention relates to an electric press processing machine, and more particularly to an electric press processing machine using a motor mounted as a driving source for an upper pressing die mounted on a lower end of a sliding member that is reciprocating and a lower die mounted on a machine tool. The time from when the upper mold at the upper limit standby position is lowered to when it contacts the workpiece placed on the lower mold or when it is about to be in contact, and when the upper mold is raised from the lower limit position to the upper limit standby position is performed at high speed. An electric press processing machine in which the die moves to shorten the pressing process (processing cycle period). [Prior art]
習知，於以馬達爲驅動源進行壓製加工的電動壓製加 工機中，對被加工物進行壓製加工時的速度是以執行壓製 加工的上模速度來決定，即使是在被加工物爲不壓製加工 的階段於一般上也是以成爲壓製加工時上模速度的一定低 速度來使上模的被加工物進行往返運動。 由於即使是在被加工物爲不壓製加工的階段也要配合 被加工物進行壓製加工時的上模速度來執行壓製加工的一 工序，所以就有需花費較多時間在壓製的一工序上的缺 點。 可解決該缺點的電動壓製加工機，於專利文獻1中， 揭示著對】組或複數組的驅動源當中的一組驅動源使用2 個馬達，以其中的第1馬達將上模於短時間內移動至壓製 -4 - (2) (2)200418633 加工位置的附近，妖後以障制^ μ ”、、恢M L _加工用的笫2馬達將上模移 往下模使被加工物壓製加Τρ & τ/j k衣加丄敗指疋形狀的電動壓製加工 機。 然而，該專利文獻1中揭示的習知技術，是使用：所 明在非壓製加I期間執行動作的高速下降、上昇移動用的 第1馬達66 ;及，所謂在壓製加工期間執行動作的壓製 加工型式用的第2馬達67的2個驅動馬達，所以其缺點 是隨著電動壓製加工機的整體構成其控制也變複雜，裝霞 本身也變大型在加上2個驅動馬達是個別使用所以成本也 變高。 〔專利文獻1〕 日本公開特許公報2 0 0 1 - 6 2 5 9 7號。 本發明，其目的在於解決上述缺點，提供一種以一組 驅動源爲單一的驅動馬達來統合上下移動，並且在所謂壓 製加工期間的被加工物不壓製加工的階段使上模可高速移 動，在可縮短壓製加工的一工序所需時間的同時在加工時 可達到轉矩增大的電動壓製加工機。 【發明內容】 本發明的目的，是提供一種在壓製加工狀態期間以外 的非壓製期間，以無段變速機的切換，就可縮短壓製加工 一工序所需時間的同時，在壓製加工狀態期間可達到轉矩 增大的電動壓製加工機。 -5- (3) (3)200418633 本發明的另一目的，是提供一種適合用在縮短壓製加 工一工序所需時間的控制裝置。 本發明的又另一目的，是提供一種可縮短壓製加工一 工序所需時間的同時於壓製加工狀態期間可轉矩增大的無 段變速機。 本發明的又另一目的，是提供一種壓製加工機合適構 造的V帶式無段變速機。 本發明的又另一目的，是提供一種可使裝有上模的滑 件上下移動的合適聯結機構。 本發明的又另一目的，是提供一種可確保壓製加工機 加工精度的聯結機構。 本發明的又另一目的，是提供一種可確保壓製加工機 耐久性的滾珠軸承位置調整手段。 本發明的又另一目的，是提供一種可適當起動控制裝 置控制時機的位置測出器。 所開示的實施例中，是針對具有：以機床和機頂及複 數支柱所形成的框體；於下端面裝有上模的同時構成爲可 自由滑動於支柱的滑件；中介著由驅動馬達進行正旋轉、 反旋轉驅動的螺旋軸，使滑件上下移動的聯結機構；及， 應對於上模的位置固定在在機床上的下模之以上模和下模 對被加工物進行壓製加工的電動壓製加工機，使其構成爲 具備有：設置在驅動馬達和螺旋軸之間的無段變速機；在 可測出上模和下模所載置的被加工物接觸位置的同時，可 測出上模上限待機位置及下限下降位置的位置測出器； -6- (4) (4)200418633 及，根據位置測出器所測出的位置訊號，於上模對下模所 載置的被加工物進行壓製加工的壓製加工狀態期間以外的 非壓製期間，是中介著無段變速機的切換來使上模急速下 降、上昇的控制裝置。 【實施方式】 〔發明之最佳實施形態〕 第1圖爲表示本發明相關電動壓製加工機的一實施例 要部說明圖。 於第]圖中，在以機床1和機頂2及複數支柱3所形 成的框體4內部。設有滑件5，於滑件5的四角落，分別 設有與支柱3卡合使滑件5可自由滑動在支柱3軸方向的 滑動孔。接著，於滑件5的下端面安裝有上模6。 在機頂2的上邰設有安裝台7。於安裝台7，安裝有 內藏送碼機8的A C伺服馬達9，又安裝有可構成爲無段 變速機1 〇的2個脈衝馬達1 1、1 2。 於安裝台7的內部，收納有：固定在AC伺服馬達9 軸上的齒輪1 3 ;可構成爲分別設在2個脈衝馬達n、j 2 的軸上可滑動自如於其軸方向的無段變速機1 0的2個v 帶輪】4、1 5 ;及掛在該2個V帶輪14、1 5上的V帶 1 6 ° 固定在A C伺服馬達9軸上的齒輪1 3，是咬合於設在 V帶輪1 4 一端的齒輪1 7，另外設在中介著V帶1 6來使 旋轉力進行傳動的帶輪1 5 —端的齒輪]8，是咬合於與機 (5) (5)200418633 頂2的螺絲部螺合貫通設置的滾珠螺旋軸i 9前端部上戶斤 固定的齒輪2 0。 於滑件5的上部，差動機構2 ](對於差動機構2 ]將 根據第3圖於後進行詳細說明）是應對於滾珠螺旋軸】9 固定著。 滾珠螺旋軸】9，是與內部設有滾珠及螺帽構件的产 動機構2 1螺合著，以滾珠螺旋軸1 9和差動機構2丨使機 頂2和滑件5成爲聯結構造。即藉由安裝台7上戶彳$ _白勺 A C伺服馬達9的正旋轉或反旋轉，使滑件5中介著無段 變速機]〇進行上昇或下降，以A C伺服馬達9的旋轉控 制就可使滑件進行往返運動。此外旋轉2個脈衝馬達 ]1、1 2，藉由改變2個V帶輪1 4、1 5的實直徑比，即藉 由改變V帶輪〗4的節徑和V帶輪1 5的節徑的比，就可 改變滑件5的運動速度。 於機床1在上模6所應對的位置上固定著下模2 2 , 在機床1和機頂2之間。安裝有可測出滑件5位置的脈動 數標23，其是形成爲可測出下模22所載置的被加工物24 和上模6的接觸位置的同時，可測出上模6的上限待機位 置及下限下降位置。 控制A C伺服馬達9以及控制可構成爲無段變速機]〇 的2個脈衝馬達1 1、1 2的各旋轉的控制裝置2 5，除了事 先輸入有各種的設定値外，滑件5位置測出用的脈動數標 2 3是根據所測出的位置訊號，在位於上限待機位置的上 模6與下模22所載置的被加工物24進行接觸的時間點或 (6) 200418633 正要接觸的時間點爲止，是中介著無段變速機1 0使 6急速下降，在上模6與被加工物2 4成接觸的的時 或從正要接觸的時間點開始至上模6下降到上述預定 限下降位置[第〗_中上模6的想像線位置（6 )]的 點爲止，上模6的下降是中介著無段變速機】〇進 速’將A c伺服馬達9成爲轉矩附加型式使上模6 下模2 2 ’以執行被加工物2 4壓製加工成指定形狀 制’在上模6於下限位置上經過指定時間後是中介著 變速機]0執行上模6急速上昇的控制。 胃2圖爲表示無段變速機的一實施例放大說明圖 第1圖爲相同的元件是標有相同符號。 於該圖中，在脈衝馬達1 1、1 2的各軸上，固定 別形成爲正螺旋和反螺旋的旋轉自如滾珠螺旋軸 2 7 °在滾珠螺旋軸2 6的底端及前端，設有可使滾珠 軸2 6旋轉自如分別安裝在安裝台7上的導向鍵2 8、 同樣地在滾珠螺旋軸2 7的底端及前端，設有設有可 珠螺旋軸27旋轉自如分別安裝在安裝台7上的導 30、 31 〇 在脈衝馬達1 ]的底端側中介著複數滾珠（省 示）螺合於滾珠螺旋軸2 6的螺帽構件3 3，是中介著 3 5安裝在可構成爲v帶輪]4 一方的帶輪片3 4上 時’螺帽構件3 3是具備有可被引導至導向鍵2 8前端 構is。同彳永地在脈衝馬達1 1的前端側中介著複數 (省略Η不）螺合於滾珠螺旋軸2 6的螺帽構件3 ό， 上模 間點 的下 時間 行減 推壓 的控 無段 ，與 著分 26、 螺旋 29 〇 使滾 向鍵 略圖 軸承 的同 部的 滾珠 是中 -9 - (7) (7)200418633 介著軸承3 8安裝在可構成爲v帶輪i 4 一方的帶輪片3 7 上的同時，螺帽構件3 6是具備有可被引導至導向鍵2 9前 端部的構造。中介著這些滾珠螺旋軸2 6和螺帽構件3 3、 3 6的複數滾珠來進行螺合的滾珠螺旋機構，於後將以第3 圖對其構造進行詳細說明。 當使脈衝馬達1】進行旋轉時，構成爲V帶輪]4的2 個帶輪片3 4、3 7會互相往接近方向或遠離方向移動，v 帶輪1 4的帶輪徑會進行連續性變化的同時，藉由可使2 個帶輪片3 4和3 7成一體性進行旋轉的固定銷3 9來使2 個帶輪片3 4和3 7成一體性。 此外’在脈衝馬達1 2的底端側中介著複數滾珠（省 略圖示）螺合於滾珠螺旋軸2 7的螺帽構件4 0，是中介著 軸承4 2安裝在可構成爲v帶輪〗5 一方的帶輪片4〗上的 同時’螺帽構件4 0是具備有可被引導至導向鍵3 0前端部 的構造。同樣地在脈衝馬達1 2的前端側中介著複數滾珠 (省略圖示）螺合於滾珠螺旋軸2 7的螺帽構件4 3，是中 介著軸承4 5安裝在可構成爲V帶輪]5——方的帶輪片4 4 上的同時，螺帽構件43是具備有可被引導至導向鍵3 1前 端部的構造。中介著這些滾珠螺旋軸2 6和螺帽構件3 3、 3 6的複數滾珠來進行螺合的滾珠螺旋機構，於後將以第3 圖對其構造進行詳細說明（但是，於該當滾珠螺旋機構中 並沒有第3圖中下述的滾珠軸承位置調整手段，但也可設 有該當滾珠軸承位置調整手段）。 當使脈衝馬達〗2進行旋轉時，構成爲v帶輪1 5的2 -10- (8) (8)200418633 個帶輪片4 ]和4 4會互相往接近方向或遠離方向移動， V帶輪]5的帶輪徑會進行連續性變化的同時，藉由可使 2個帶輪片4 1和4 4成一體性進行旋轉的固定銷3 9來使2 個帶輪片和4 4成一體性。 接著，2個脈衝馬達1 1和]2會收到控制裝置2 5 (參 照第1圖）所輸出的使2個脈衝馬達]]和1 2爲同期進行 相反方向旋轉的訊號，例如當脈衝馬達]]側的V帶輪】4 的節徑變大時，則脈衝馬達1 2側的v帶輪1 5的節徑會 變小。V帶輪I 4和1 5的節徑比是變大，以v帶1 6進行 傳動的V帶輪1 5的旋轉數會增加。另外，反之，當脈衝 馬達1 1側的V帶輪1 4的節徑變小時，則脈衝馬達〗2側 的V帶輪i 5的節徑會變大。v帶輪1 4和1 5的節徑比是 變小’以V帶1 6進行傳動的V帶輪1 5的旋轉數會減 少。 @，A C伺服馬達9軸上所安裝的齒輪1 3的旋轉，是 藉由安裝台7內部所設置的無段變速機1 〇，來對固定在 滾珠螺旋軸1 9上的齒輪2 0以無段速度傳達其旋轉。 第3圖爲表示差動機構的一實施例構造說明用剖面 圖。另，對於差動機構，本申請人是以PCT/JP 0 1 /09 0 5 6 提出專利申請。 第1圖所使用的差動機構2 1，具備有第3圖所圖示 的構造，差動機構2 1具備有由滾珠螺旋軸]9和複數滾珠 5 〇及螺帽構件5 1所形成的滾珠軸承。另外，第2圖所說 明的滾珠螺旋軸2 6和螺帽構件3 3、3 6以及滾珠螺旋軸 -11 - (9) (9)200418633 2 7和螺帽構件4 Q、4 3的各別的滾珠螺旋機構，也是具備 有與由滾珠螺旋軸1 9和複數滾珠5 〇及螺帽構件5 1所形 成的滾珠軸承爲相同的機構。 接著於第3圖中，又可具備著具有活動構件5 2和差 動構件5 3及支承構件5 4的滾珠軸承位置調整手段。 螺帽構件5 1，在中介著滾珠5 0與滾珠螺旋軸1 9要 滾珠螺旋卡合的中心部設有滾珠溝槽5 5，藉由該中介著 滾珠5 0的滾珠螺旋軸1 9和螺帽構件5 ]的滾珠螺旋卡 合，得以對上模6執行正確且高精度的位置控制。 於螺帽構件5 ]的下端部，固定著活動構件52，該活 動構件5 2設有貫穿孔可使滾珠螺旋軸1 9貫穿滾珠軸承位 置調整手段所屬之處的中心部。在該當活動構件5 2和於 中心部形成有滾珠螺旋軸1 9貫穿用的孔並且於上端面形 成有傾斜面5 6的支承構件5 4之間，設有於中心部可貫穿 滾珠螺旋軸1 9的同時本身爲足夠可滑動的孔。接著下端 面是以與形成在支承構件5 4上的傾斜面5 6爲相同的傾斜 角形成有反方向傾斜面的差動構件5 3，是構成爲可滑動 於圖面左右方向（第3圖的A箭頭符號兩方向），螺帽 構件5 1是構成爲中介著活動構件5 2只可於垂直方向（第 3圖的B箭頭符號兩方向）進行移動（於第3圖中省略圖 示活動構件5 2只限於垂直方向進行移動的約束機構）。 如此般以脈衝馬達或手動來旋轉螺絲部5 7，藉由螺 帽構件5 1於垂直方向微小距離的移動，使做爲用構成爲 滾珠螺旋的滾珠5 0和滾珠溝槽5 5的線接觸或點接觸來進 -12- (10) (10)200418633 行卡合的滾珠螺旋，能夠避免載重時常在同一位置上的線 接觸或點接觸所進行的卡合造成滾珠5 0或滾珠溝槽5 5的 局部性磨損。 即，在上模6到達至最下點的時間點雖會產生可使上 模6更下降的最大載重，但是當使用同一上模6和同一下 模2 2及同一被加工物2 4來進行壓製加工時，該當最大載 重的滾珠螺旋軸]9和滾珠5 〇及螺帽構件5 ]的滾珠溝槽 5 5，在同一所決定的位置關係下滾珠螺旋軸]9和滾珠5 0 會局邰性接觸，於該接觸部份產生磨損。使用該當差動機 構2 1，在每逢要進行各壓製加工時，或在每逢指定次數 (例如5次程度）進行各壓製加工時，藉由將差動構件 5 3插入往箭頭符號A兩方或往箭頭符號a兩方抽出，可 使在最大載重的上述滾珠螺旋軸]9和滾珠5 0及螺帽構件 5 1的滾珠溝槽5 5的位置關係變成些許錯開，以防止磨 損。差動構件5 3的插抽狀況，以1次的插入來講，對於 徑1 0mm程度的滾珠50在大徑上的上述接觸部會有2 " m 程度的逐次錯開。如此一來，差動構件5 3約1 5 7 0 0次的 插入，就可使接觸點在滾珠5 0大徑上環繞一周。 使用第4圖自動運轉的一實施例循環線圖對如此般構 成的本發明電動壓製加工機的動作進行說明。 第4圖的縱軸表示衝程，橫軸表示時間，實線表示壓 製軌跡，及表示上模6的軌跡。 時間軸上的T0是表示上模6爲上限待機位置狀態下 的循環開始時間點，時間軸上的T1是表示上模6的下降 -13- (11) (11)200418633 開始時間點，時間軸上的τ 2是表示上模6與下模2 2所載 置的被加工物24表面進行接觸的時間點，時間軸上的Τ3 是表示上模6的預定下限下降位置到達時間點，時間軸上 的Τ 4是表示上模6的下限下降位置起的上昇開始時間 點’時間軸上的Τ5是表示上模6的上限待機位置到達時 間點’時間軸上的Τ 6是表示上模6 —循環完成時間點。 所謂的時間Τ 1〜Τ2，是爲上模6的上限待機位置起 至接觸下模2 2所載置的被加工物2 4爲止的非壓製期間， 無段變速機1 0的V帶輪]4、] 5是設定成可使上模6急 速下降的節徑比，使上模6得以急速下降。接著所謂的時 間Τ2〜Τ4，是爲AC伺服馬達9變成轉矩附加形式，上 模6對下模22所載置的被加工物24進行壓製加工的壓製 期間，無段變速機]0的V帶輪1 4、1 5是降成壓製型式 節徑比，另外時間Τ4〜Τ5，是爲上模6從下限下降位置 恢復成其上限待機位置爲止的非壓製期間，無段變速機 1 〇的V帶輪1 4、1 5是設定成可使上模6急速上昇的節徑 比’使上模6得以急速上昇。如此一來就可縮短壓製加工 的一工序（循環期）所需時間。 於上述說明中，做爲無段變速機】〇的一例，雖是使 用動力傳動確實的帶式無段變速機來進行了說明，但也可 使用動力傳動確實的鍊條式無段變速機。 此外，對脈衝馬達1 1、1 2·雖是使用滾珠螺旋軸26、 2 7，以滾珠螺旋機構來變化V帶輪1 4、1 5的各節徑，但 也可使用通常的螺旋機構來變化V帶輪1 4、1 5的各節 -14- (12) (12)200418633 徑。 另外，對於做爲可測出下模2 2所載置的被加工物24 和上模6接觸位置的同時，又可測出上模6的上限待機位 置及下限下降位置的位置測出器，雖圖示爲脈衝數標 2 3，但只要能夠測出位置並能夠將該測出訊號送往控制裝 置2 5的機器，也可使用其他電子式或機械式的位置測出 器。 〔產業上之可利用性〕 如以上說明，根據本發明時，因是在單一壓製用驅動 馬達構成的電動壓製加工機使用無段變速機，於不壓製加 工的步驟中使上模進行高速移動，所以在可縮短壓製加工 一工序（循環期）所需時間的同時在加工時可達到轉矩增 大。 另，於電動壓製加工機中，有時會使用複數組的驅動 源一齊產生驅動力來驅動上模進行壓製加工。於具有如此 般的複數組驅動源的電動壓製加工機中，上述所謂的單一 壓製用驅動馬達，是指在上述複數組驅動源當中一組驅動 源中所使用的單一壓製用驅動馬達。 【圖式簡單說明】 第1圖爲本發明相關電動壓製加工機的一實施例要部 說明圖。 第2圖爲無段變速機的一實施例放大說明圖。 -15- (13) (13)200418633 第3圖爲差動機構的一實施例構造說明用剖面圖。 第4圖爲本發明相關電動壓製加工機的一實施例循環 線圖。 主要元件對照表 1 機床 2機頂 3 支柱 4框體 5滑件 6上模 7安裝台 8 送碼機 9 A服馬達 1 〇無段變速機 1 1、1 2脈衝馬達 1 3齒輪 1 4、1 5 V帶輪 16 V帶 1 7、1 8、2 0 齒輪 1 9滾珠螺旋軸 2 1差動機構 22下模 2 3脈衝數標 -16- (14)200418633 2 4 被加工物 2 5控制裝置 26 > 27滾珠螺旋軸 2 8、2 9 導向鍵 3 0、3 1導向鍵It is known that in an electric press processing machine that uses a motor as a driving source to perform press processing, the speed at which the workpiece is pressed is determined by the speed of the upper die that performs the press processing, even if the workpiece is not pressed. In the processing stage, the object to be processed in the upper mold is generally reciprocated at a certain low speed, which is the speed of the upper mold during press processing. Since the pressing process is performed in accordance with the speed of the upper die when the object is pressed, even if the object is not pressed, there is a need to spend more time on the pressing process. Disadvantages. An electric press processing machine capable of solving this disadvantage discloses in Patent Document 1 that two motors are used for a group of driving sources of a group or a plurality of driving sources, and the first motor among them is used to mold on a short time. Move to press -4-(2) (2) 200418633 near the processing position, the demon queen with obstacles ^ μ ", 恢 _ _ 2 motor used for processing moves the upper mold to the lower mold to suppress the workpiece Τρ & τ / jk clothing plus electric finger press machine. However, the conventional technique disclosed in this patent document 1 uses: the high-speed descending of the action performed during the non-pressing plus I, The first motor 66 for the ascending movement; and the two drive motors of the second motor 67 for the so-called press processing type that executes operations during the press processing. Therefore, the disadvantage is that the control of the electric press processing machine also constitutes its control. It becomes complicated, and the equipment itself also becomes large. When two driving motors are used separately, the cost is also high. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2 0 1-6 2 5 9 7 The present invention, which The purpose is to solve the above disadvantages and provide A type of driving motor that uses a set of driving sources as a single driving motor to integrate up and down movement, and allows the upper mold to move at a high speed during the so-called pressing process of the workpiece without pressing, thereby reducing the time required for one step of the pressing process. At the same time, an electric pressing machine capable of increasing torque during processing can be achieved. [Summary of the invention] The object of the present invention is to provide a non-pressing period other than the pressing process state, which can be shortened by switching the stepless speed changer. An electric press working machine capable of achieving an increase in torque during the press working state while the time required for a press working process. -5- (3) (3) 200418633 Another object of the present invention is to provide an electric press working machine suitable for use in Control device for shortening time required for one pressing process. Another object of the present invention is to provide a continuously variable transmission that can shorten the time required for one pressing process and increase torque during the pressing state. Yet another object of the present invention is to provide a V-belt stepless speed changer having a suitable structure for a press machine. Yet another object of the present invention is The invention provides a suitable coupling mechanism which can move the slider equipped with an upper mold up and down. Yet another object of the present invention is to provide a coupling mechanism which can ensure the processing accuracy of a press processing machine. Yet another object of the present invention is to provide A ball bearing position adjustment method capable of ensuring durability of a press processing machine. Yet another object of the present invention is to provide a position detector that can appropriately start a control device to control timing. The disclosed embodiment is directed to a device having: A frame formed by a machine tool, a machine top and a plurality of pillars; an upper die is mounted on the lower end surface and is configured as a sliding member that can slide freely on the pillars; and a spiral shaft driven by a drive motor for forward rotation and reverse rotation is interposed, A coupling mechanism for moving the slider up and down; and an electric press processing machine for pressing and processing the object with respect to the upper die and the lower die fixed on the machine tool to the position of the upper die, so as to be provided with : Stepless speed changer installed between the drive motor and the screw shaft; while the contact position of the workpiece placed on the upper and lower molds can be measured, Position detector that measures the upper limit standby position and lower limit lower position of the upper mold; -6- (4) (4) 200418633 and, based on the position signal measured by the position detector, placed on the upper mold to the lower mold The non-pressing period other than the press-processing state during which the processed object is press-processed is a control device that rapidly lowers and raises the upper die through the switching of the stepless speed changer. [Embodiment] [Best Embodiment of the Invention] FIG. 1 is an explanatory diagram showing an essential part of an embodiment of an electric press working machine according to the present invention. In the figure, inside the frame 4 formed by the machine tool 1 and the top 2 and the plurality of pillars 3 is shown. Sliding members 5 are provided, and sliding holes 5 are respectively provided at the four corners of the sliding member 5 so as to engage with the pillar 3 so that the sliding member 5 can freely slide in the axis direction of the pillar 3. Next, an upper die 6 is attached to the lower end surface of the slider 5. An installation table 7 is provided on the upper part of the machine roof 2. On the mounting table 7, an AC servo motor 9 with a built-in feeder 8 is mounted, and two pulse motors 1 and 12 which can be configured as a stepless speed changer 10 are mounted. Inside the mounting table 7 are housed: a gear 1 3 fixed on the shaft of the AC servo motor 9; it can be configured to be provided on the shafts of the two pulse motors n, j 2 and can be slid freely in the direction of the shaft 2 v-belt wheels of the speed changer 10] 4, 1 5; and V-belt 16 hanging on the 2 V-belt wheels 14, 15 15 ° The gears 13 fixed to the 9-axis of the AC servo motor are A gear 17 engaged at one end of a V-belt 1 4 and a pulley 15-end provided with a V-belt 16 to transmit rotational force] 8 are engaged with the machine (5) ( 5) 200418633 The screw part of the top 2 is screwed with a ball screw shaft i 9 which is provided through the front end of the fixed gear 20. On the upper part of the slider 5, the differential mechanism 2] (for the differential mechanism 2] will be described in detail later according to FIG. 3) is fixed to the ball screw shaft] 9. Ball screw shaft] 9 is screw-engaged with a production mechanism 21 with ball and nut components inside. The ball screw shaft 19 and differential mechanism 2 are used to make the roof 2 and slider 5 into a joint structure. That is, through the forward rotation or reverse rotation of the AC servo motor 9 on the installation table 7, the slider 5 is interposed between the stepless speed changer] and the ascending or descending, and the rotation control of the AC servo motor 9 is performed. The slider can be moved back and forth. In addition, two pulse motors are rotated] 1, 12, and by changing the real diameter ratio of the two V-belts 1, 4, 15, that is, by changing the pitch diameter of the V-belt 4 and the pitch of the V-belt 15 The ratio of the diameters can change the moving speed of the slider 5. A lower die 2 2 is fixed on the machine tool 1 at a position corresponding to the upper die 6 between the machine tool 1 and the top 2. A pulsation number 23 capable of detecting the position of the slider 5 is installed, and is formed so that the contact position between the workpiece 24 placed on the lower mold 22 and the upper mold 6 can be measured, and the upper mold 6 can be detected. Upper limit standby position and lower limit lowering position. A control device 25 that controls the rotation of the AC servo motor 9 and the two pulse motors 11 and 12 that can be configured as a stepless speed changer. In addition to the various settings entered in advance, the position of the slider 5 is measured. The pulsation number indicator 2 3 for use is based on the measured position signal at the time when the upper mold 6 and the workpiece 24 placed on the lower mold 22 contact each other at the upper standby position or (6) 200418633 Until the point of contact, the stepless speed changer 10 is used to lower 6 rapidly, and when the upper die 6 is in contact with the workpiece 24, or from the point of contact, the upper die 6 is lowered to the above. The lower limit of the predetermined limit position [No. __ the imaginary line position of the upper die 6 (6)], the lower die 6 is lowered through the stepless speed changer] 〇 Advance speed will turn AC servo motor 9 into torque The additional type makes the upper die 6 and the lower die 2 2 'press the processed object 2 4 to press into a specified shape.' After the specified time has passed on the upper die 6 at the lower limit position, there is an intermediary transmission] 0 The upper die 6 is executed to rise rapidly control. Stomach 2 is an enlarged explanatory view showing an embodiment of a stepless speed changer. Figure 1 is the same components are marked with the same symbols. In this figure, on each axis of the pulse motors 11 and 12, a freely rotatable ball screw shaft 2 7 formed as a forward spiral and a reverse spiral is fixed at the bottom and front ends of the ball spiral shaft 26. The ball shaft 2 6 can be rotated freely, and the guide keys 2 8 respectively installed on the mounting table 7 are also provided at the bottom and front ends of the ball screw shaft 2 7. A ball screw shaft 27 can be installed and installed separately. The guides 30 and 31 on the stage 7 are provided with a plurality of balls (not shown) on the bottom end side of the pulse motor 1 and screwed to the ball screw shaft 26. A nut member 3 3 is interposed between 3 and 5. [V-belt pulley] 4 When one of the pulley pieces 3 4 is on, the 'nut member 3 3 is provided with a front end structure that can be guided to the guide key 2 8. At the same time, a plurality of nut members 3 (which are omitted) are screwed onto the ball screw shaft 2 6 at the front end side of the pulse motor 1 1. The ball bearing on the same side of the bearing with the scroll 26 and the screw 29 is the same as that of the bearing 26. (7) (7) 200418633 is mounted on the belt that can be configured as a v-belt i 4 through the bearing 3 8 The nut member 36 is provided with the structure which can be guided to the front-end | tip part of the guide key 29 at the same time as the wheel piece 37. A ball screw mechanism for screwing these ball screw shafts 26 and nut members 3 3 and 3 6 in between is described in detail later with reference to FIG. 3. When the pulse motor 1] is rotated, the two pulley pieces 3, 4, 3 constituting a V-belt] 4 will move toward or away from each other, and the pulley diameter of the v-belt 1 4 will be continuous. At the same time, the two pulley pieces 3 4 and 37 are integrated by a fixing pin 39 that can rotate the two pulley pieces 34 and 37 integrally. In addition, a plurality of balls (not shown) are screwed on the bottom end side of the pulse motor 12 to the ball screw shaft 27. The nut member 40 is screwed to the ball screw shaft 27, and the bearing 4 2 is mounted on the bottom. 5 One of the pulley pieces 4 is a structure in which the 'nut member 40 is provided with a front end portion which can be guided to the guide key 30. Similarly, a nut member 4 3 screwed to the ball screw shaft 2 7 is interposed between a plurality of balls (not shown) on the front end side of the pulse motor 12, and the bearing 4 5 is mounted through the bearing. 5 can be configured as a V-belt] 5 The nut member 43 is provided with a structure that can be guided to the front end of the guide key 31 while the square pulley piece 4 4 is attached to it. A ball screw mechanism that performs screwing through a plurality of balls of these ball screw shafts 26 and nut members 3 3, 3 6 will be described in detail with reference to FIG. 3 (however, the ball screw mechanism There is no means for adjusting the position of the ball bearing described in the third figure, but it may be provided with the means for adjusting the position of the ball bearing). When the pulse motor 2 is rotated, 2 -10- (8) (8) 200418633 pulley pieces 4] and 4 4 which constitute a v-belt 1 5 will move toward or away from each other. The V-belt Wheel] 5 while the diameter of the pulley changes continuously, the two pulleys 4 1 and 4 4 are integrally rotated to fix the two pulleys 4 and 4 4 Oneness. Next, the two pulse motors 1 1 and 2 will receive the signals from the control device 2 5 (refer to Figure 1) to make the two pulse motors]] and 1 2 rotate in opposite directions at the same time. For example, when the pulse motors The V-belt on the [] side] 4 becomes larger, and the v-belt 15 on the side of the pulse motor 12 becomes smaller. The pitch ratio of the V-belts I 4 and 15 becomes larger, and the number of rotations of the V-belt 15 which is driven by the V-belt 16 increases. On the other hand, when the pitch diameter of the V pulley 14 on the pulse motor 11 side becomes smaller, the pitch diameter of the V pulley i 5 on the pulse motor 2 side becomes larger. The pitch ratio of the v-belts 14 and 15 is smaller. The number of rotations of the V-belt 15 which is driven by the V-belt 16 is reduced. @, The rotation of the gear 13 mounted on the AC servo motor 9 shaft is performed by the stepless speed changer 1 0 installed inside the mounting table 7 to the gear 20 fixed on the ball screw shaft 19 Segment speed conveys its rotation. Fig. 3 is a sectional view showing the structure of an embodiment of a differential mechanism. For the differential mechanism, the applicant filed a patent application under PCT / JP 0 1/09 0 5 6. The differential mechanism 21 used in FIG. 1 includes the structure shown in FIG. 3. The differential mechanism 21 includes a ball screw shaft 9, a plurality of balls 50, and a nut member 51. Ball bearings. In addition, the ball screw shaft 26 and the nut member 3 3, 3 6 and the ball screw shaft -11-(9) (9) 200418633 2 7 and the nut member 4 Q, 4 3 illustrated in FIG. 2 The ball screw mechanism has the same mechanism as a ball bearing formed by a ball screw shaft 19, a plurality of balls 50, and a nut member 51. Next, in FIG. 3, a ball bearing position adjusting means including the movable member 52, the differential member 53, and the support member 54 may be further provided. The nut member 51 is provided with a ball groove 5 5 at the center of the ball screw engagement between the ball 50 and the ball screw shaft 19 through the ball screw shaft 19 and the screw through the ball 50. The ball screw engagement of the cap member 5] enables accurate and high-precision position control of the upper die 6. A movable member 52 is fixed to a lower end portion of the nut member 5], and the movable member 52 is provided with a through hole so that the ball screw shaft 19 can pass through a center portion where the ball bearing position adjusting means belongs. Between the movable member 52 and a supporting member 5 4 having a ball screw shaft 19 formed in the center portion thereof and an inclined surface 5 6 formed on the upper end surface, a ball screw shaft 1 is provided at the center portion. The 9 at the same time is itself a sufficiently slidable hole. Next, the lower end face is a differential member 5 3 with a reverse inclined surface formed at the same inclination angle as the inclined surface 56 formed on the supporting member 54, and is configured to be slidable in the left-right direction of the drawing (Fig. 3). A arrow sign in both directions), the nut member 5 1 is configured to move through the movable member 5 2 only in the vertical direction (the two directions of the B arrow sign in FIG. 3) can be moved (the illustration of the activity is omitted in FIG. 3) The member 52 is limited to a restraint mechanism that moves in the vertical direction). In this way, the screw portion 5 7 is rotated by a pulse motor or manually, and the nut member 5 1 is moved in a small vertical distance, so that the ball 50 formed as a ball spiral and the ball groove 55 are brought into line contact with each other. Or point contact comes in -12- (10) (10) 200418633 The ball screw that engages in a row can avoid the ball 5 or ball groove 5 caused by the line or point contact which is often at the same position when the load is loaded. 5 localized wear. That is, at the time when the upper die 6 reaches the lowest point, although the maximum load that can further lower the upper die 6 is generated, the same upper die 6 and the same lower die 2 2 and the same workpiece 24 are used for the load. During the pressing process, the ball screw shaft [9] and ball grooves 5 [5], which are the maximum load, and the ball groove 5 5 of the nut member [5], the ball screw shaft [9], and the ball 5 0 will be localized under the same positional relationship. Sexual contact causes abrasion at the contact portion. When the differential mechanism 21 is used, each time a pressing process is to be performed, or every time a pressing process is performed a specified number of times (for example, about five times), the differential member 53 is inserted into the arrow symbol A two Withdrawing from both sides of the arrow symbol a, the positional relationship between the ball screw shaft 9 and the ball 50 and the ball groove 55 of the nut member 51 at the maximum load can be slightly staggered to prevent abrasion. With regard to the insertion and extraction of the differential member 53, the contact portion of the ball 50 having a diameter of about 10 mm on the large diameter may be sequentially shifted by about 2 m in terms of a single insertion. In this way, the insertion of the differential member 5 3 about 15 700 times can make the contact point circle around the ball 50 large diameter. The operation of the electric press working machine of the present invention thus constructed will be described using a cycle diagram of an embodiment of automatic operation shown in FIG. In Fig. 4, the vertical axis represents the stroke, the horizontal axis represents time, the solid line represents the pressing locus, and the locus of the upper die 6. T0 on the time axis is the cycle start time point when the upper mold 6 is the upper limit standby position, and T1 on the time axis is the drop time of the upper mold 6 -13- (11) (11) 200418633 Start time point, time axis The upper τ 2 is the time point at which the upper mold 6 comes into contact with the surface of the workpiece 24 placed on the lower mold 2 2, and the T3 on the time axis is the time point when the predetermined lower limit lower position of the upper mold 6 is reached. The time axis T4 on the top indicates the rising start time point from the lower limit lowering position of the upper mold 6 'T5 on the time axis indicates the upper limit standby position of the upper mold 6 reaches the time point' T6 on the time axis indicates the upper mold 6 — The point at which the cycle is completed. The so-called times T1 to T2 are the non-pressing period of the V-belt of the stepless transmission 10 from the upper standby position of the upper mold 6 to the contact with the workpiece 24 placed on the lower mold 2 2] 4,] 5 is a pitch diameter ratio set so that the upper die 6 can be rapidly lowered, so that the upper die 6 can be rapidly lowered. Then the so-called time T2 ~ T4 is for the AC servo motor 9 to become a torque added form. The upper die 6 presses the workpiece 24 placed on the lower die 22 during the pressing process. The stepless speed changer] 0 V The pulleys 1, 4 and 15 are reduced to the compaction type diameter ratio, and the other times T4 to T5 are for the non-suppressed period when the upper mold 6 returns from the lower limit lowered position to its upper limit standby position. The V-belt pulleys 14 and 15 are set at a pitch ratio 'that allows the upper die 6 to rise rapidly so that the upper die 6 can rise rapidly. In this way, the time required for one step (cycle period) of the pressing process can be shortened. In the above description, as an example of the stepless speed changer, although a belt type stepless speed changer with reliable power transmission has been described, a chain type stepless speed changer with reliable power transmission may be used. In addition, for the pulse motors 11 and 12, although the ball screw shafts 26 and 27 are used, the ball screw mechanism is used to change the pitch diameters of the V-belt pulleys 1, 4 and 15. However, a normal screw mechanism may be used. Change the diameter of each section of the V-belt wheels 1, 4 and 15. -14- (12) (12) 200418633. In addition, as a position detector that can measure the contact position of the workpiece 24 and the upper die 6 placed on the lower die 22 and the upper standby position and lower limit lowering position of the upper die 6, Although it is shown as a pulse number scale 23, as long as it can detect the position and send the detected signal to the control device 25, other electronic or mechanical position detectors can be used. [Industrial Applicability] As described above, according to the present invention, the stepless speed changer is used in the electric press processing machine constituted by a single pressing drive motor, and the upper mold is moved at a high speed in the step without press processing. Therefore, while reducing the time required for one step (cycle period) of the pressing process, the torque can be increased during processing. In addition, in an electric press processing machine, a driving force of a plurality of sets of driving sources is used to generate a driving force to drive the upper mold for press processing. In an electric press working machine having such a complex driving source, the so-called single pressing driving motor refers to a single pressing driving motor used in a set of driving sources among the above-mentioned driving power of the plurality of driving groups. [Brief Description of the Drawings] FIG. 1 is an explanatory diagram of essential parts of an embodiment of an electric press working machine according to the present invention. Fig. 2 is an enlarged explanatory view of an embodiment of the stepless speed changer. -15- (13) (13) 200418633 Fig. 3 is a sectional view for explaining the structure of an embodiment of the differential mechanism. Fig. 4 is a cycle diagram of an embodiment of an electric press working machine according to the present invention. Comparison table of main components 1 Machine tool 2 Top 3 Pillar 4 Frame 5 Slider 6 Upper die 7 Mounting table 8 Code feeder 9 A service motor 1 〇 Stepless speed changer 1 1, 1 2 Pulse motor 1 3 Gear 1 4, 1 5 V pulley 16 V belt 1 7, 1 8, 2 0 Gear 1 9 Ball screw shaft 2 1 Differential mechanism 22 lower die 2 3 Pulse number scale -16- (14) 200418633 2 4 Workpiece 2 5 Control Device 26 > 27 ball screw shaft 2 8, 2 9 guide key 3 0, 3 1 guide key
3 3、3 6 螺帽構件 3 4' 37 帶輪片 3 5、3 8 軸承 3 9固定銷 4 0、4 3 螺帽構件 41、44 帶輪片 42 ' 45 軸承 5 0 滚珠 5 1螺帽構件 5 2活動構件3 3, 3 6 Nut member 3 4 '37 With wheel 3, 5, 3 8 Bearing 3 9 Fixing pin 4 0, 4 3 Nut member 41, 44 With wheel 42' 45 Bearing 5 0 Ball 5 1 Nut Component 5 2 movable component
5 3差動構件 5 4支承構件 5 5滾珠溝槽 5 6傾斜面 5 7螺絲部 T0循環開始時間點 T 1上模的下降開始時間點 T2上模與被加工物表面進行接觸的時間點 T3上模的預定下限下降位置到達時間點 -17- (15)200418633 T4上模的下限下降位置起的上昇開始時間點 Τ5上模的上限待機位置到達時間點 Τ6 —循環期完成時間點5 3 Differential member 5 4 Support member 5 5 Ball groove 5 6 Inclined surface 5 7 Screw portion T0 Cycle start time point T 1 Upper start time of the die T2 Time point T3 when the upper die contacts the surface of the workpiece Time when the lower limit lower position of the upper die is reached -17- (15) 200418633 T4 Rise start time point T5 from the lower limit lower position of the upper die T5 Upper limit standby position of the upper die arrives at time T6 —The completion time of the cycle period
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