1312707 (1) 九、發明說明 【發明所屬之技術領域] 本發明’是適用於例如對鎂合金或鈦合金、不鏽鋼、 高張力鋼等難加工材料或是模具淬火工法之熱處理用鋼板 進行沖壓加工的沖壓加工方法。 【先前技術】 一般於沖壓加工，可分類成：剪斷加工、彎曲加工、 引伸加工、成型加工，壓縮加工等，更進一步地在各別之 加工法’又可分爲在加工前將材料加熱至室溫以上再進行 加工之溫-熱間加工以及在室溫下加工材料之冷間加工。 然而’以沖壓加工將鎂合金、鈦合金、不鏽鋼、高張 力鋼等難加工材料予以成型之需求在今後有增加之趨勢。 此等難加工材料之沖壓加工，由於在冷間加工下會產生破 裂或龜裂，所以以在熱間加工或是溫間加工來進行爲理想 。又’適用在抗拉強度超過10 OMPa級以上高張力鋼之零 件的沖壓成型，對於適用模具淬火工法將熱處理用鋼板加 熱到沃斯田鐵化之溫度後，在模具內沖壓成型並同時冷卻 淬火之情形有增加趨勢。因此，在決定沖壓加工的良劣上 ’要如何地將材料加熱變得十分重要。 以往，在溫間加工或是熱間加工，作爲將被加工材料 予以加熱之方法，周知有：（A )使用加熱爐來加熱被加 工材料之方法；（B )利用加熱器以被加熱保溫之模具挾 持被加工材料來加熱之方法（例如，請參照日本特開 -4 - (2) (2)1312707 2001- 252729號公報）；（C)以模具本身作爲電極，以電 極兼模具夾持被加工材料，藉由通電產生焦耳熱來加熱之 方法（例如，請參照日本專利第328 5 903號公報、日本特 開平8 -7 1 6 84號公報）；（D)將被加工材料之兩端以電 極夾緊（上夾）然後藉由通電產生焦耳熱來加熱之方法（ 例如，請參照日本特開2002-18531號公報、日本特開 2002- 248525 號公報）等。 然而，上述（A)使用加熱爐之方法中，由於另外必 須加熱裝置或是搬運裝置，所以會有導致設備大型化或成 本升昇之問題點。還有由於設備上的關係，從加熱爐到模 具的搬運距離較長，所以亦有加熱後之被加工材料溫度顯 著降低的問題點。 又，利用上述（B )之加熱器使用加熱保溫模具之方 法中，由於從模具壽命之觀點上，具有被加工材料的加熱 溫度需限制在該模具的回火溫度以下之問題點。又，比起 欲加熱之被加工材料，體積龐大之模具爲了要一直事先保 持加熱保溫之狀態，故亦有電力消費量大之問題點。 又，使用上述（C )之電極兼模具之方法，則具有必 須另外設置通電加熱用單元之問題點。又，由於以模具本 身來作爲電極，因此具有要局部性加熱被加工材料困難且 效率不佳之問題點。 又，如上述（D )般地，將被加工材料的兩端以電極 夾緊（上夾）然後通電藉由焦耳熱來加熱之方法中，由於 必須將被加工材料上夾及鬆夾之動作，故具有生產速度下 -5- (3) (3)1312707 降之問題點，而難以適用在連續模加工。又’由於是將被 加工材料的兩端以電極夾緊通電來加熱，所以具有難以將 被加工材料做局部性加熱之問題點。 本發明，係爲了消除如此之問題點而發明，其目的在 於提供一種不需要特別的加熱用單元，以緊緻裝置之構成 就可以效率良好地加熱鎂合金或高張力鋼等難加工材料， 或是將模具淬火工法之熱處理用鋼板以因應其材質或形狀 效率良好地加熱，而能夠容易地進行沖壓成型之沖壓加工 φ 方法。 【發明內容】 爲了達成上述目的，依據本發明之沖壓加工方法， 是針對於使用連續模具進行沖壓加工之沖壓加工方法 在上述連續模具中之一預定加工載台之材料進料方向 上流側，設有停空工位載台之同時，藉由在上述停空工位 春 載台配置對被加工材料導通電流所需之電極，在上述停空 工位載台進行利用上述電極以通電作用將被加工.材料予以 加熱之通電加熱程序之後，然後在上述預定加工載台進行 沖壓加工，來作爲其特徵。 依據本發明，由於在預定之加工載台使被加工材料被 沖壓加工之則，在停空工位載台對該被加工材料實施通電 加熱程序，因此即使被加工材料爲鎂合金、鈦合 = 个_ 鋼、高張力鋼等難加工材料，也能夠容易地在預定之加工 -6- (4) 1312707 載台進行沖壓成形。又，由於通電加熱程序，是 具所設置之停空工位載台之位置被進行，所以不 的加熱用單元，因此可以謀求裝置構成的緊緻化 通電加熱程序，是藉由被配設在停空工位載台之 加工材料進行通電作用所產生的焦耳熱來進行， 效率良好地加熱被加工材料，同時利用調整作用 材料之電流値或是通電時間、電極數等，可以因 材料的材質自由設定加熱溫度，又，藉由調整電 ’可以局部性地加熱被加工材料，即使是不規則 工材料也能夠加熱所希望的部位。並且由於通電 連動於連續模具之動作而進行，所以對於被加工 有如先行技術般必須將電極上夾及鬆夾所導致之 降低之問題。再者’由通電加熱程序而被加熱之 料的搬運動作，由於只有在連續模具之停空工位 定的加工載台之間來進行，所以被加熱後之被加 溫度下降被抑制在極微小，同時可以防止被加工 化。 在本發明中，上述通電加熱程序，是在下料 程序之後進行爲理想。如此的話，由於是在下料 進行通電加熱程序’所以可以有效率地加熱被加 同時藉由下料程序在被加工材料所產生之空間的 ，可以達到使被加工材料之被加熱部位的熱難以 圍的效果。 又，上述電極是被配置在對應被加工材料之 在連續模 需要特別 。再者， 電極對被 所以可以 於被加工 應被加工 極的配置 狀之被加 作用是以 材料不會 生產速度 被加工材 載台與預 工材料的 材料的氧 (沖裁） 程序之後 工材料， 絕熱效果 逃逸至周 必須加熱 (5) (5)1312707 之部位爲理想。藉由如此實施，由於電極是被配置在對應 被加工材料之必須加熱部位，所以可以因應加工內容效率 良好地加熱被加工材料。 又，上述電極，是在受到彈簧之彈性力的同時亦能夠 保持沿著上述連續模具之動作方向而移動爲理想。如此實 施的話，由於電極是被設置成一面受到彈簧的彈性力之同 時亦能夠沿著連續模具之動作方向而移動。所以可以緩和 電極在能夠通電於被加工材料而接觸到被加工材料時之衝 φ 擊力’因此可以謀取對電極、被加工材料等之保護，同時 良好地保持電極與被加工材料的接觸狀態。又，藉由調整 電極與被加工材料能夠通電時所接觸的接觸位置，可以調 整電極與被加工材料的接觸時間（通電時間），藉此進而 可以調整加熱時間。 胃者’上述停空工位載台，是在進行上述通電加熱程 $胃’ &藉由上述連續模具由外部給予遮蔽爲理想。如此 # % @ ’由於在進行通電加熱程序時，停空工位載台利 · $ 續模具由外部予以遮蔽，所以可以確實地防止電極接 或物’並且，藉由從外部予以遮蔽也可以提高昇溫 效率。 【實施方式】 甘 ’參照圖面同時說明依據本發明之沖壓加工方法 的具體性實施形態。 1 圖’是以模式方式顯示本發明之一實施形態之沖 (6) 1312707 壓機械要部的正面圖。又’第2圖，爲從第1圖之A_a箭 頭方向所觀察之第1通電加熱用模具之要部構造的說明圖 ’其中圖（a)爲顯示可通電之狀態；圖（b)爲圖（a) 之P-P方向之視圖。 本實施形態之沖壓機械1，如第〗圖所示，是利用以 伺服馬達作爲驅動源之滑塊驅動機構（圖示省略），能夠 在上下方向上以任意位移方式將滑塊2加以驅動而構成。 於該沖壓機械1，在滑塊2及模座（bolster) 3之間，設 置有依製程順序將複數個模具排列成一列的連續模具4， 藉由無圖示出之材料供給裝置，使被送進該連續模具4內 之被加工材料5’利用上述滑塊2的上下驅動被進行連續 級層加工。 在上述連續模具4中，係從第1圖中記號f所顯示之 材料進料方向的上流側依順序分別設置：第1加工載台6 、弟2加工載口 7、桌1停空工位載台（idle-stage) 8、 第3加工載台9、第2停空工位載台1〇、第4加工載台U 及第5加工載台1 2。在此，本實施形態中之所謂停空工位 載台是指’在沖壓加工程序上沒有進行沖壓加工的空工載 台’包含在模具設計上無法避免而設置的停空工位載台， 以及人爲任意所設置之停空工位載台兩者。又，若是以利 用上述無法避免而設置的停空工位載台來設置爲上述第1 停空工位載台8及/或第2停空工位載台丨〇之方式，則相 對於以往沖壓加工方法中之連續模具的設置面積，將可以 使本實施形態之連續模具4的設置面積以無增大或是微小 -9 - (7) (7)1312707 增加之方式來實施。 在上述第1加工載台6，配置有對被加工材料5施以 穿孔（pierce )加工用以穿設導向孔之工作穿孔加工用模 具13。並且依序各別地，在上述第2加工載台7配置有對 被加工材料5進行砂漏型沖裁之砂漏型下料加工用模具14 ;在上述第3加工載台9配置有對被加工材料5以朝向下 側進行圓筒引伸加工之第1圓筒引伸加工用模具丨5。又依 序各別地’在上述第4加工載台11配置有對於在上述第3 加工載台9已被施以圓筒引伸加工之被加工材料5更進一 步地進行與上述圓筒引伸加工相反方向之圓筒引伸加工之 第2圓筒引伸加工用模具16;在上述第5加工載台12配 置有對被加工材料5進行切邊之切邊用模具17。另一方面 ’在上述第1停空工位載台8及第2停空工位載台10，分 別配置有於後詳述之第1通電加熱用模具1 8以及第2通 電加熱用模具1 9。 在此，上述各加工用模具 1 3、1 4、1 5、1 6、1 7以及 上述各通電加熱用模具18、19之各別下模13a〜19a，是 安裝在被固定於模座3上面之下部基板20的上面。又， 上述各加工用模具 13、14、15、16、17以及上述各通電 加熱用模具18、19之各別上模13b〜19b，是安裝在被固 定於滑塊2下面之上部基板2 1的下面。又，在上述下部 基板2 0與上部基板2 1之間，夾設有導柱2 2，使得上部基 板2 1受該導柱22所導引而相對於下部基板20可以上下 動作。 -10- (8) (8)1312707 被配設在上述第1停空工位載台8之第1通電加熱用 模具18，如第2圖（a) (b)所示，導通電流於被加工材 料5所需之電極25係夾介絕緣體26安裝在上下各模具 18b、18a而構成。在該第1通電加熱用模具18，相對於 形成爲圓盤狀之被加工材料5，該等電極25是被配置在第 3加工載台9實施圓筒引伸加工時對應所必須加熱的部位 。如此地’以更有效率之方式來加熱被加工材料5。又， 在該第1通電加熱用模具18，藉由上述所需之電極25以 通電作用來進行加熱被加工材料5之通電加熱程序時，該 等電極25如第2圖（a)所示，是受到構成連續模具4之 —部分之該第1通電加熱用模具18的上下各模具18b、 1 8 a將外部予以遮蔽。如此地，在進行通電加熱程序時， 可以確實地防止電極25接觸到人或物，也可以提高昇溫 效率。再者’在該第1通電加熱用模具18，下模18a係被 設置成相對於下部基板2 0 ’沿著圖示省略之導引而能夠上 下動作之同時’在下部基板2 0與下模1 8 a之間配置有所 需的壓縮線圈彈簧27’使得上述所必要之電極25，一面 受到該等壓縮線圈彈簧2 7之彈性力之同時亦能夠沿著該 第1通電加熱用模具1 8的動作方向移動。如此地，可以 緩和電極2 5能夠通電地接觸到被加工材料5時的衝擊力 ，以謀取對電極2 5、被加工材料5等之保護，同時良好地 保持電極2 5與被加工材料5的接觸狀態。又，藉由調整 電極2 5與被加工材料5能夠通電時所接觸的接觸位置， 可以調整電極2 5與被加工材料$的接觸時間（通電時間 -11 - (9) 1312707 )進而調整加熱時間。又，取代上述壓縮線圈彈簧27 ’以 使用氣墊緩衝或是模具墊緩衝銷等亦可。 另一方面’被配置在上述第2停空工位載台10之第2 通電加熱用模具1 9，如第3圖（a )( b )所示，導通電流 於被加工材料5所需之電極25係不同於上述第1通電加 熱用模具18之電極25，爲夾介絕緣體26安裝在上下各模 具19b、19a而構成。在該第2通電加熱用模具19之該等 電極25’是被配置在第4加工載台n對於已實施引伸加 工之加工材料5更進一步地進行相反方向之圓筒引伸加工 (在此之相反方向之圓筒引伸加工以下稱之爲「逆向圓筒 引伸加工」）所對應之必須加熱的部位。如此地，即使是 不規則狀之被加工材料5也能夠因應加工內容效率良好地 加熱。 其次’一面參照第1圖及第4圖，同時說明本實施形 態之沖壓加工程序之內容。在此，於第4圖，是顯示是本 實施形態之沖壓加工程序的帶狀料排樣圖。又，在第4圖 中’各程序的步驟號碼是標示以記號「κ」來表示。 首先’對於藉由材料供給裝置（圖示省略）而被送入 連續模具4內之被加工材料5，在第1加工載台6進行工 作穿孔加工’在該被加工材料5穿設2個導向孔3 0 ( Κ 1 )。又，該2個導向孔3 0，是將藉由材料供給裝置將捲繞 狀的被加工材料5予以平坦地矯正，並在連續模具4內以 一預定長度進料之被加工材料5嵌合於設置在該連續模具 4的誘導定位銷（圖示省略），用以對該連續模具4定位 -12- (10) 1312707 出被加工材料5之位置的定位用孔。 接者 在第2加工載台7，藉由砂漏型下料加工將被 加工材料5之成型預定部位的外周予以沖落（K 2 )。然後 ’在弟1停空工位載台8,藉由被安裝在上下模具18b、 1 8a的電極25將被加工材料5予以夾持然後通電，因應材 質將該被加工材料5加熱到足以進行圓筒引伸加工時之最 適合的溫度（K3)。然後，在第3加工載台9，對被加工 材料5實施圓筒引伸加工，使該被加工材料5成形爲杯狀 (K4 )。又，在上述步驟K3中，作爲被加工材料5之最 適合的溫度’例如’被加工材料5之材質爲鎂合金時爲 2 5 0 °C 〜35(TC ; SUS304 時爲 l〇(TC 〜15(rC ;熱處理用鋼 板之模具淬火工法時爲9 0 01左右。 其次’在第2停空工位載台1 〇，將在上述步驟K4已 成形爲杯狀之被加工材料5，藉由藉由被安裝在上下模具 19b、19a的電極25予以夾持然後通電，對已成形爲杯狀 之該被加工材料5當進行逆向圓筒引伸加工時所必須加熱 之部位予以加熱到最適合的溫度（K 5 )。然後，在第4加 工載台Π，對呈杯狀的被加工材料5實施逆向圓筒引伸加 工（K6 )。然後，在第5加工載台12，對被加工材料5 進行切邊而分離爲沖切廢料5a及成型品5b ( K7 )。 依據本實施形態，因爲在第3加工載台9對被加工材 料5實施圓筒引伸加工之前’在第1停空工位載台8對該 被加工材料5實施通電加熱程序之同時，又在第4加工載 台1 1對被加工材料5實施逆向圓筒引伸加工之前，在第2 -13- (11) 1312707 停空工位載台10對該被加工材料5實施通 因此即使被加工材料5爲鎂合金、駄合金、 力鋼等難加工材料，皆可以分別容易地進行 台9之圓筒引伸加工，第4加工載台η之 加工。 又’在各停空工位載台8、1〇之通電加 是在第2加工載台7進行了砂漏型下料沖裁 行’所以可以更有效率地將被加工材料5予 藉由砂漏型下料沖裁程序在被加工材料5所 、Η ’ （請參照第4圖）的絕熱效果，可以 材料5之被加熱部位的熱難以逃逸至周圍之 再者’依據本實施形態，具有如以下之 (1) 上述各通電加熱程序，由於是在j 設置之各停空工位載台8、10之位置被進行 特別的加熱用單元，因此可以謀求裝置構成 (2) 上述各通電加熱程序，是藉由被 工位載台8、10之電極25對被加工材料5 所產生的焦耳熱來進行，所以可以效率良好 材料5，同時利用調整作用於被加工材料5 通電時間、電極數等，可以因應被加工材料 設定加熱溫度。 (3) 由於電極25對被加工材料5的通 動於連續模具4之動作之方式而進行，所以 降低。 電加熱程序， 不鏽鋼、尚張 在第3加工載 逆向圓筒引伸 熱程序，由於 程序之後所進 以加熱，同時 產生之空間Η 達到使被加工 效果。 優點。亦即： 婁續模具4所 '，所以不需要 的緊緻化。 配設在各停空 進行通電作用 地加熱被加工 之電流値或是 5的材質自由 :電作用是以連 ,生產速度不會 -14 - (12) 1312707 (4 )受到通電加熱程序而被加熱之被加工材料5的 搬運動作，由於只有在連續模具4之第1停空工位載台8 與第3加工載台9之間，以及第2停空工位載台10與第4 加工載台1 1之間來進行，所以被加熱後之被加工材料5 的溫度下降被抑制在極微小，同時可以防止被加工材料5 的氧化。 【圖式簡單說明】 · 第1圖’是以模式方式顯示本發明之一實施形態之沖 壓機械要部的正面圖。 第2圖’爲從第i圖之A-A箭頭方向所觀察之第1通 電加熱用模具之要部構造的說明圖，其中圖（a)爲顯示 可通電之狀態；圖（b)爲圖（a)之p_p方向之視圖。 第3圖’是由第丨圖之b-B箭頭方向所觀察之第2通 電加熱用模具之要部構造的說明圖，其中圖（a)爲顯示 可通電之狀態；圖（b )爲圖（a )之Q-Q方向之視圖。 · 第4圖’是本實施形態之沖壓加工程序的帶狀料排樣 圖。 【主要元件之符號說明】 1 :沖壓機械 2 :滑塊 3 :模座 4 :連續模具 -15- (13) (13)1312707 5 :被加工材料 6 :第1加工載台 7 :第2加工載台 8 :第1停空工位載台 9 :第3加工載台 10:第2停空工位載台 1 1 :第4加工載台 1 2 :第5加工載台 1 3 :穿孔加工用模具 13a〜19a:下型下模 13b〜19b:上型上模 1 4 :砂漏型下料加工用模具 15 :第1圓筒引伸加工用模具 1 6 :第2圓筒引伸加工用模具 1 7 :切邊用模具 18、19:通電加熱用模具 2 0 :下部基板 2 1 :上部基板 2 2 :導柱 2 5 :電極 2 6 :絕緣體 2 7 :線圏彈簧 3 0 :導向孔 F : 進料方向 -16-1312707 (1) IX. Description of the invention [Technical field to which the invention pertains] The present invention is applicable to, for example, press processing of heat-treated steel sheets such as magnesium alloys or titanium alloys, stainless steels, high-tensile steels, and the like, or a mold quenching method. Stamping processing method. [Prior Art] Generally, in stamping processing, it can be classified into: shearing, bending, drawing, forming, compression, etc., and further in the respective processing methods, which can be further divided into heating materials before processing. Temperature-to-heat processing to room temperature and above and cold room processing of materials at room temperature. However, the demand for forming difficult-to-machine materials such as magnesium alloys, titanium alloys, stainless steels, and high-tensile steels by press processing is increasing in the future. Since the press working of such difficult-to-machine materials is caused by cracking or cracking during cold working, it is preferable to perform the hot working or the warm working. 'Applicable to the stamping of parts with high tensile strength of tensile strength above 10 OMPa. For the application of the mold quenching method, after heating the steel sheet for heat treatment to the temperature of the ironation of Worth, it is stamped and formed in the mold while cooling and quenching. There is an increasing trend in the situation. Therefore, it is important to heat the material in determining the quality of the press processing. In the past, in the case of warm processing or hot intercalation, as a method of heating a material to be processed, it is known that: (A) a method of heating a material to be processed using a heating furnace; and (B) a heater to be heated and insulated. The mold is held by the material to be heated (for example, refer to Japanese Patent Laid-Open No. -4 (2) (13) 1312707 2001-252729); (C) the mold itself is used as an electrode, and the electrode and the mold are clamped. A method of heating a material to generate Joule heat by energization (for example, refer to Japanese Patent No. 328 5 903, Japanese Patent Laid-Open No. Hei 8-7 1 6 84); (D) both ends of a material to be processed A method of heating by means of electrode clamping (upper clamping) and then generating Joule heat by energization (for example, refer to JP-A-2002-18531, JP-A-2002-248525). However, in the above method (A) in which the heating furnace is used, since the heating device or the conveying device is additionally required, there is a problem that the equipment is enlarged or the cost is increased. Also, due to the relationship between the equipment, the transportation distance from the heating furnace to the mold is long, so there is also a problem that the temperature of the material to be processed after heating is remarkably lowered. Further, in the method of heating and holding the mold by the heater of the above (B), the heating temperature of the material to be processed needs to be limited to the tempering temperature of the mold from the viewpoint of the life of the mold. Further, compared with the material to be processed to be heated, the bulky mold has a problem of large power consumption in order to maintain the state of heating and heat preservation in advance. Further, the method of using the electrode and the mold of the above (C) has a problem that it is necessary to additionally provide a unit for supplying electric heating. Further, since the mold itself is used as an electrode, there is a problem that it is difficult to locally heat the material to be processed and the efficiency is not good. Further, as in the above (D), in which the both ends of the material to be processed are clamped by the electrodes (upper clamping) and then energized by Joule heat, the action of clamping and loosening the material to be processed is necessary. Therefore, it has a problem of -5 - (3) (3) 1312707 drop in production speed, and it is difficult to apply to continuous mold processing. Further, since both ends of the material to be processed are heated by clamping and energizing the electrodes, there is a problem that it is difficult to locally heat the material to be processed. The present invention has been made in order to eliminate such a problem, and an object of the invention is to provide a unit for heating that can efficiently heat a difficult-to-machine material such as a magnesium alloy or a high-tensile steel without requiring a special heating unit, or It is a press processing φ method in which the steel sheet for heat treatment of the mold quenching method is efficiently heated in accordance with the material or shape thereof, and can be easily subjected to press forming. SUMMARY OF THE INVENTION In order to achieve the above object, a press working method according to the present invention is directed to a press working method for performing press working using a continuous die, and is provided on a flow side of a material processing direction of one of the continuous molds in the continuous mold. At the same time as the stop station of the stop station, the electrode required for conducting current to the material to be processed is disposed on the spring stage of the above-mentioned stop station, and the above-mentioned electrode is used for energization at the stop station. After processing, the material is heated and energized, and then subjected to press working on the predetermined processing stage as a feature. According to the present invention, since the material to be processed is subjected to press working on a predetermined processing stage, the material to be processed is subjected to an electric heating process at the stop station, so that even if the material to be processed is magnesium alloy or titanium alloy = _ Steel, high tensile steel and other difficult-to-machine materials can also be easily stamped and formed on the predetermined processing -6- (4) 1312707 stage. Moreover, since the electric heating and heating program is performed at the position of the empty station which is provided, the heating unit is not provided, so that the device can be configured to be compacted and energized and heated. The processing material of the stop station is energized by the Joule heat generated by the energization, and the material to be processed is efficiently heated, and the current 値 or the energization time, the number of electrodes, etc. of the adjustment material can be used, and the material of the material can be used. The heating temperature can be set freely, and the material to be processed can be locally heated by adjusting the electric power, and the desired portion can be heated even by the irregular material. Further, since the energization is carried out in conjunction with the operation of the continuous mold, there is a problem that the machining is performed such that the electrode is clamped and loosened as in the prior art. Furthermore, the conveyance operation of the material heated by the energization heating program is performed only between the processing stages defined by the stop working place of the continuous mold, so that the temperature increase after being heated is suppressed to a very small amount. At the same time, it can prevent being processed. In the present invention, it is preferable that the above-described energization heating procedure is performed after the blanking process. In this case, since the electric heating process is performed in the blanking process, it is possible to efficiently heat the space which is added by the blanking process in the material to be processed, so that the heat of the heated portion of the material to be processed is difficult to surround. Effect. Further, the above-mentioned electrodes are disposed in a continuous mold corresponding to the material to be processed. Furthermore, the electrode pair can be added to the configuration of the workpiece to be processed, so that the material is not produced at the speed of the workpiece and the material of the pre-formed material (oxygen). , the insulation effect escapes to the week must be heated (5) (5) 1312707 is ideal. According to this configuration, since the electrode is disposed at a necessary heating portion corresponding to the material to be processed, the material to be processed can be efficiently heated in accordance with the processing content. Further, it is preferable that the electrode is held in the direction in which the continuous mold is moved while being subjected to the elastic force of the spring. In this case, since the electrode is disposed to be elastically biased by the spring, it can be moved along the moving direction of the continuous mold. Therefore, it is possible to alleviate the impact force when the electrode is energized to the material to be processed and contact with the material to be processed. Therefore, it is possible to protect the counter electrode, the material to be processed, and the like while maintaining the contact state between the electrode and the material to be processed. Further, by adjusting the contact position at which the electrode and the material to be processed can be energized, the contact time (energization time) between the electrode and the material to be processed can be adjusted, whereby the heating time can be adjusted. The stomacher's above-mentioned idling station stage is ideal for performing the above-described energization heating process, which is ideal for shielding from the outside by the continuous mold. Thus # % @ 'Because the power-on heating program is used, the stop station carries the slab and the stencil is shielded from the outside, so the electrode can be reliably prevented from being attached and can be improved by shielding from the outside. Heating efficiency. [Embodiment] A concrete embodiment of a press working method according to the present invention will be described with reference to the drawings. 1 is a front view showing a main part of a press machine (6) 1312707 according to an embodiment of the present invention in a mode. In addition, FIG. 2 is an explanatory view of a structure of a main part of the first electric heating mold viewed from the direction of the arrow A_a in the first drawing, wherein (a) shows a state in which electric power can be supplied, and (b) is a figure. (a) A view of the PP direction. As shown in the first diagram, the press machine 1 of the present embodiment is a slider drive mechanism (not shown) that uses a servo motor as a drive source, and can drive the slider 2 in an arbitrary displacement manner in the vertical direction. Composition. In the press machine 1, between the slider 2 and the bolster 3, a continuous mold 4 in which a plurality of dies are arranged in a row in a process sequence is provided, and is provided by a material supply device not shown. The material to be processed 5' fed into the continuous mold 4 is subjected to continuous layer processing by the up and down driving of the slider 2. In the continuous mold 4, the upstream side of the material feeding direction indicated by the symbol f in Fig. 1 is sequentially provided: the first processing stage 6, the second processing port 7, and the table 1 emptying station. An idle-stage 8, a third processing stage 9, a second stop station, a fourth processing stage U, and a fifth processing stage 12. Here, the so-called docking station in the present embodiment means that the "aircraft stage that has not been subjected to press working in the press working process" includes a stop station that is inevitably provided in the mold design, and And any of the stop station stations that are set by humans. In addition, in the case where the first stop station 8 and/or the second stop station are provided by the above-mentioned unstoppable stop station, the above-described first stop station 8 and/or the second stop station are used. The installation area of the continuous mold in the press working method can be implemented such that the installation area of the continuous mold 4 of the present embodiment is increased without increasing or by a small amount of -9 - (7) (7) 1312707. The first processing stage 6 is provided with a work punching tool 13 for piercing the workpiece 5 by piercing the guide hole. Further, in the second processing stage 7, the hourglass-type blanking processing die 14 for sand-blasting the workpiece 5 is disposed in the second processing stage 7, and the third processing stage 9 is disposed in the pair. The material to be processed 5 is a first cylinder extension working die 丨5 which is subjected to cylindrical drawing processing toward the lower side. Further, in the fourth processing stage 11, the workpiece material 5 which has been subjected to the cylindrical drawing processing on the third processing stage 9 is further disposed in the same manner as the above-described cylindrical drawing processing. The second cylinder extension processing die 16 for the cylindrical drawing process in the direction is disposed on the fifth processing stage 12, and the trimming die 17 for trimming the workpiece 5 is disposed. On the other hand, in the first air-stop station 8 and the second air-stop station 10, the first electric heating mold 18 and the second electric heating mold 1 which will be described later are disposed, respectively. 9. Here, each of the processing dies 13 , 14 , 15 , 16 , and 17 and the respective lower molds 13 a to 19 a of the respective electric heating molds 18 and 19 are attached to the mold base 3 . The upper surface of the lower substrate 20 above. Further, the respective processing dies 13, 14, 15, 16, and 17 and the respective upper dies 13b to 19b of the respective electric heating molds 18 and 19 are attached to the upper substrate 2 1 which is fixed to the lower surface of the slider 2. Below. Further, between the lower substrate 20 and the upper substrate 2, a guide post 22 is interposed so that the upper substrate 21 is guided by the guide post 22 and can be moved up and down with respect to the lower substrate 20. -10- (8) (8) 1312707 is placed in the first electric heating mold 18 of the first stop station 8, and as shown in Fig. 2 (a) and (b), the conduction current is The electrode 25 required for processing the material 5 is sandwiched between the upper and lower molds 18b and 18a. In the first electric heating mold 18, the electrode 25 is placed on the workpiece 5 to be formed into a disk shape, and the electrodes 25 are disposed in a portion where the third processing stage 9 is required to be heated during the cylindrical drawing process. The workpiece 5 is heated in such a way as to be more efficient. In the first electric heating and heating mold 18, when the required electrode 25 is energized to heat the workpiece 5, the electrode 25 is as shown in Fig. 2(a). The upper and lower molds 18b and 18a of the first electric heating mold 18 constituting the continuous mold 4 are shielded from the outside. As described above, when the energization heating process is performed, it is possible to surely prevent the electrode 25 from coming into contact with a person or a thing, and it is also possible to improve the temperature increase efficiency. In the first electric heating mold 18, the lower mold 18a is provided so as to be movable up and down with respect to the lower substrate 20' as shown in the drawing, and is in the lower substrate 20 and the lower mold. A desired compression coil spring 27' is disposed between 1 8 a so that the electrode 25 required as described above can be subjected to the elastic force of the compression coil spring 27 while being along the first electric heating mold 18 The direction of movement moves. In this way, the impact force when the electrode 25 can be electrically contacted with the workpiece 5 can be alleviated to protect the counter electrode 25, the material to be processed 5, and the like while maintaining the electrode 25 and the material to be processed 5 well. Contact status. Further, by adjusting the contact position at which the electrode 25 and the workpiece 5 can be energized, the contact time of the electrode 25 with the workpiece $ can be adjusted (the energization time -11 - (9) 1312707 ) to adjust the heating time. . Further, instead of the compression coil spring 27', an air cushion cushion or a mold cushion cushion pin may be used. On the other hand, the second electric heating mold 19 disposed on the second stop station 10 is electrically connected to the material to be processed 5 as shown in Fig. 3(a)(b). The electrode 25 is different from the electrode 25 of the first electric heating mold 18 described above, and is configured such that the interposer insulator 26 is attached to the upper and lower molds 19b and 19a. In the second electric heating mold 19, the electrodes 25' are arranged on the fourth processing stage n to further perform the cylindrical drawing processing in the opposite direction to the processed material 5 subjected to the drawing processing (herein the opposite The direction of the cylinder extension processing is referred to as "reverse cylinder extension processing" (hereinafter referred to as "reverse cylinder extension processing"). In this way, even the irregularly processed material 5 can be efficiently heated in accordance with the processing contents. Next, the contents of the stamping processing program of the present embodiment will be described with reference to Figs. 1 and 4. Here, in Fig. 4, a strip-like material pattern drawing showing the press working program of the present embodiment is shown. Further, in Fig. 4, the step numbers of the respective programs are indicated by the symbol "κ". First, the workpiece 5 that is fed into the continuous mold 4 by the material supply device (not shown) is subjected to a work punching process on the first processing stage 6 'two guides are formed in the workpiece 5 Hole 3 0 ( Κ 1 ). Further, the two guide holes 30 are formed by flatly correcting the wound material 5 by the material supply device, and the workpiece 5 is fed in the continuous mold 4 by a predetermined length. An inducing positioning pin (not shown) provided in the continuous mold 4 is used to position the continuous mold 4 with a positioning hole at a position of -12-(10) 1312707 from the material to be processed 5. In the second processing stage 7, the outer periphery of the predetermined portion of the workpiece 5 to be processed is washed (K 2 ) by the hourglass type blanking process. Then, 'the younger one stops the station 8 and holds the material to be processed 5 by the electrodes 25 mounted on the upper and lower molds 18b, 18a, and then energizes the material to be processed to be sufficient for the material to be processed. The most suitable temperature (K3) for cylinder extension processing. Then, on the third processing stage 9, a cylindrical drawing process is performed on the workpiece 5 to form the workpiece 5 into a cup shape (K4). Further, in the above step K3, the most suitable temperature as the material to be processed 5, for example, when the material of the material to be processed 5 is a magnesium alloy is 250 ° C to 35 (TC; SUS 304 is l 〇 (TC 〜 15 (rC; the mold quenching method for the steel sheet for heat treatment is about 0.001. Next, in the second stop station, the workpiece is formed into a cup-shaped material 5 by the step K4. By sandwiching and then energizing the electrodes 25 mounted on the upper and lower dies 19b, 19a, the portion of the workpiece 5 that has been formed into a cup shape to be heated during the reverse cylinder drawing process is heated to the most suitable position. Temperature (K 5 ) Then, in the fourth processing stage, a reverse cylindrical drawing process (K6 ) is performed on the cup-shaped workpiece 5 . Then, on the fifth processing stage 12 , the workpiece 5 is processed. The trimming waste 5a and the molded product 5b (K7) are separated by trimming. According to the present embodiment, the first emptying station is performed before the cylindrical forming process is performed on the workpiece 5 by the third processing stage 9. The stage 8 performs an electric heating process on the material to be processed 5, and is in the fourth Before the processing stage 1 performs reverse cylindrical drawing processing on the workpiece 5, the workpiece 5 is stopped at the second station 13 - 13 (13) 1312707, so that even the material to be processed 5 is Magnesium alloys, niobium alloys, force steels and other difficult-to-machine materials can be easily subjected to the cylindrical extension processing of the table 9 and the processing of the fourth processing stage η. Also, at each of the stop stations 8, 1 The electric current addition is performed on the second processing stage 7 by the sand leakage type blanking blanking operation, so that the material to be processed 5 can be more efficiently processed by the sand leakage type blanking process in the material to be processed 5 In the heat-insulating effect of Η' (see Fig. 4), it is possible to prevent the heat of the heated portion of the material 5 from escaping to the surroundings. According to the present embodiment, each of the above-described energization heating programs has the following It is possible to perform a special heating unit at the positions of the stop stations 8 and 10 provided at j. Therefore, the device configuration can be achieved. (2) The above-described energization heating procedures are performed by the station carriers 8, 10 The electrode 25 is performed on the Joule heat generated by the material to be processed 5, The heating temperature can be set in accordance with the material to be processed by the adjustment of the energization time of the material to be processed 5, the number of electrodes, etc. (3) Since the electrode 25 is in contact with the material to be processed 5 in the continuous mold 4 The operation is carried out in a manner that is reduced. The electric heating program, stainless steel, and the extension of the third process load reverse cylinder extension heat program, due to the heating after the program, and the resulting space 达到 achieves the effect of being processed. That is: the mold 4 is continued, so it is not required to be compacted. It is equipped with a material that is heated at each stop to heat the processed current 値 or 5: the electrical action is connected, the production speed It is not -14 - (12) 1312707 (4) The conveyance operation of the workpiece 5 heated by the energization heating process is only the first stop station 8 and the third processing stage in the continuous mold 4 Between 9 and between the second idling station stage 10 and the fourth processing stage 1 1 , the temperature drop of the material to be processed 5 after being heated is suppressed to a minimum, and at the same time, it can be prevented from being Oxidation of the processed material 5. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing a main part of a press machine according to an embodiment of the present invention in a mode. Fig. 2 is an explanatory view showing a structure of a main part of a first electric heating mold viewed from the direction of the AA arrow in the i-th diagram, wherein (a) shows a state in which electric current can be supplied, and (b) is a figure (a). ) The view of the p_p direction. Fig. 3 is an explanatory view showing a structure of a main part of a second electric heating mold viewed from the direction of the arrow bB of the second drawing, wherein (a) shows a state in which electric power can be supplied; and (b) is a figure (a). ) The view of the QQ direction. Fig. 4 is a strip-shaped material pattern of the press working program of the present embodiment. [Symbol description of main components] 1 : Stamping machine 2 : Slider 3 : Die base 4 : Continuous mold -15- (13) (13) 1312707 5 : Material to be processed 6 : First processing stage 7 : Second processing Stage 8 : 1st stop station 9 : 3rd processing stage 10 : 2nd stop station 1 1 : 4th processing stage 1 2 : 5th processing stage 1 3 : Perforation processing Molds 13a to 19a: Lower molds 13b to 19b: Upper molds 1 4: Sand blow type blanking mold 15: First cylinder extension mold 1 6 : Second cylinder extension mold 1 7 : Trimming die 18, 19: Electric heating mold 2 0 : Lower substrate 2 1 : Upper substrate 2 2 : Guide post 2 5 : Electrode 2 6 : Insulator 2 7 : Coil spring 3 0 : Guide hole F : Feeding direction-16-