200524688 (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 〇MPa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 - 200524688 (2) 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3 2 85 903號公報、日本特 開平8 - 7 1 6 8 4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，5P3參照日本特開 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 200524688 (3) 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 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、鈦合金、不f 鋼、高張力鋼等難加工材㈣，也能夠容易地在預定之加= -6 - 200524688 (4) 載台進行沖壓成形。又’由於通電加熱程序，是在連續模 具所設置之停空工位載台之位置被進行，所以不需要特別 的加熱用單元，因此可以謀求裝置構成的緊緻化。再者， 通電加熱程序，是藉由被配設在停空工位載台之電極對被 加工材料進行通電作用所產生的焦耳熱來進行，所以可以 效率良好地加熱被加工材料，同時利用調整作用於被加工 材料之電流値或是通電時間、電極數等，可以因應被加工 材料的材質自由設定加熱溫度，又，藉由調整電極的配置 ’可以局部性地加熱被加工材料，即使是不規則狀之被加 工材料也能夠加熱所希望的部位。並且由於通電作用是以 連動於連續模具之動作而進行，所以對於被加工材料不會 有如先行技術般必須將電極上夾及鬆夾所導致之生產速度 降低之問題。再者，由通電加熱程序而被加熱之被加工材 料的搬運動作，由於只有在連續模具之停空工位載台與預 定的加工載台之間來進行，所以被加熱後之被加工材料的 溫度下降被抑制在極微小，同時可以防止被加工材料的氧 化。 在本發明中，上述通電加熱程序，是在下料（沖载） 程序之後進行爲理想。如此的話，由於是在下料程序之後 進行通電加熱程序，所以可以有效率地加熱被加工材料， 同時藉由下料程序在被加工材料所產生之空間的絕熱％ $ ，可以達到使被加工材料之被加熱部位的熱難以逃逸至胃 圍的效果。 又，上述電極是被配置在對應被加工材料之必須力Q _ 200524688 (5) 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。 51 ’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 · 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。 再者’上述停空工位載台，是在進行上述通電加熱程 序時’以藉由上述連續模具由外部給予遮蔽爲理想。如此 實施的話，由於在進行通電加熱程序時，停空工位載台利 0 用連續模具由外部予以遮蔽，所以可以確實地防止電極接 觸到人或物，並且，藉由從外部予以遮蔽也可以提高昇溫 ‘ 效率。 【實施方式】 其次，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。 第1圖，是以模式方式顯示本發明之一實施形態之沖 -8 - 200524688 (6) 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1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 、第2加工載台7、第1停空工位載台（idle-st age) 8、 第3加工載台9、第2停空工位載台10、第4加工載台11 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1 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- 200524688 (7) 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1 3。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j 4 :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1 5。又依 序各別地，在上述第4加工載台1 i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1〇，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13、14、15、16、17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20與上部基板2 1之間，夾設有導柱22，使得上部基 板21受該導柱22所導引而相對於下部基板20可以上下 動作。 -10- 200524688 (8) 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1 8，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 一部分之該第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2 5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 和電極2 5能夠通電地接觸到被加工材料5時的衝擊力 ，以謀取封電極2 5 '被加工材料5等之保護，同時良好地 保ί寸電極2 5與被加工材料5 &勺接觸狀態。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J整電極2 5與被加工材料5的接觸時間（通電時間 -11 - 200524688 Ο) )進而調整加熱時間。又，取代上述壓縮線圈彈簧2 7，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19，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2 5 ’是被配置在第4加工載台1 1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「K」來表示。 首·失：’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，在第丨加工載台6進行工 作芽孔加工’在該被加工材料5穿設2個導向孔3 〇 ( κ 1 )。又，該2個導向孔3 〇，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- 200524688 (10) 出被加工材料5之位置的定位用孔。 接著，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（κ2 )。然後 ’在第1停空工位載台8,藉由被安裝在上下模具i8b、 1 8 a的電極2 5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 250C〜350C ; SUS304時爲l〇〇°C〜150°C ;熱處理用鋼 板之模具淬火工法時爲9〇(rc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^位予以加熱到最適合的溫度（K 5 )。然後，在第4加 工載台1 1 ’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1 2，對被加工材料5 進行切邊而分離爲沖切廢料5 a及成型品5 b ( κ 7 )。 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貫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- 200524688 (11) 停空工位載台1 0對該被加工材料5實施通電加熱程序， 因此即使被加工材料5爲鎂合金、鈦合金、不鏽鋼、高張 力鋼等難加工材料，皆可以分別容易地進行在第3加工載 台9之圓筒引伸加工，第4加工載台11之逆向圓筒引伸 加工。 又’在各停空工位載台8、1〇之通電加熱程序，由於 是在第2加工載台7進行了砂漏型下料沖裁程序之後所進 行’所以可以更有效率地將被加工材料5予以加熱，同時 藉由砂漏型下料沖裁程序在被加工材料5所產生之空間η 、Η’ （請參照第4圖）的絕熱效果，可以達到使被加工 材料5之被加熱部位的熱難以逃逸至周圍之效果。 再者’依據本實施形態，具有如以下之優點。亦即： (1 )上述各通電加熱程序，由於是在連續模具4所 設置之各停空工位載台8、10之位置被進行，所以不需要 特別的加熱用單元，因此可以謀求裝置構成的緊緻化。 (2)上述各通電加熱程序，是藉由被配設在各停空 工位載台8、10之電極25對被加工材料5進行通電作用 所產生的焦耳熱來進行’所以可以效率良好地加熱被加工 材料5，同時利用調整作用於被加工材料5之電流値或是 通電時間、電極數等，可以因應被加工材料5的材質自由 設定加熱溫度。 (3 )由於電極2 5封被加工材料5的通電作用是以連 動於連續模具4之動作之方式而進行，所以生產速度不會 降低。 -14- 200524688 (12) (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1〇與第4 加工載台11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。 明是正 說，的 單圖部 簡1要 式第械 圖機 ^ 壓 之 明 發 本 示 顯 式 方 式 模 以 沖 之 態 形 施 圖 方其 - 目 箭圖 A 明a) A-說 C 之的圖 圖造爲 1 構 3 b 第部丨 從要圖 爲之 ； ，具態 圖模狀 2 用之 第熱電 加通 電可 通示 1顯 第爲 之 } 察 觀 所 向 圖 視 C 之 圖向 中方 a 通示 2 顯 第爲 之} 察(a 觀 所圖 向中 方 其 頭 ， 箭圖 B 明 B 說 之的 圖造 1 構 第部 由要 是之 ， 具 圖模 3 用 第熱 加 ί 調 態’ 犬 圖 之4 電第 通 。 可 圖 圖 Q 之 本 是 樣 UUUI ο 圖料 視狀 之帶 向的 方序 Q程 Η 加 壓 \)/ a 沖 C之 圖態 爲形 } 施 明 說 符 之 件 元 要 主 械 具 機 模 壓塊座續 沖滑模連 -15- 200524688 (13) 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 1 〇 :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 16 :第2圓筒引伸加工用模具 1 7 :切邊用模具 1 8、1 9 :通電加熱用模具 20 :下部基板 2 1 :上部基板 22 :導柱 25 :電極 2 6 :絕緣體 27 :線圈彈簧 3 0 :導向孔 F :進料方向 -16-200524688 (1) IX. Description of the invention [Technical field to which the invention belongs] The present invention is applicable to, for example, stamping processing of hard-to-machine materials such as magnesium alloys or titanium alloys, stainless steel, high-tensile steel, or heat treatment steel plates for die quenching. Stamping method. [Previous technology] Generally used in stamping processing, which can be classified into: cutting processing, bending processing, extension processing, forming processing, compression processing, etc. Further in the respective processing methods, it can also be divided into heating the material before processing Temperature-hot processing and cold processing of materials processed at room temperature are performed above room temperature. However, the demand for forming difficult-to-machine materials such as magnesium alloys, titanium alloys, stainless steels, and high-tensile steels by stamping will increase in the future. The stamping of these difficult-to-machine materials may cause cracking or cracking in cold processing, so it is ideal to perform hot processing or warm processing. In addition, it is suitable for stamping and forming of high-tensile steel parts with a tensile strength of more than 100 MPa. For the mold quenching method, the steel plate for heat treatment is heated to the temperature of Vostian Ironization, and then stamped and cooled in the mold Quenching situations have an increasing tendency. Therefore, in determining the quality of the stamping process, how to heat the material becomes very important. In the past, in a warm room process or a hot room process, as a method for heating the material to be processed, it is known: (A) a method for heating the material to be processed using a heating furnace; (B) using a heater to heat and heat A method in which a mold holds a material to be heated (for example, refer to JP-4-200524688 (2) 2001-252729); (c) the mold itself is used as an electrode, and the electrode and the mold are used to hold the material to be processed. A method of heating by generating Joule heat by applying electricity (for example, refer to Japanese Patent No. 3 2 85 903, Japanese Patent Laid-Open No. 8-7 1 6 8 4); (d) the ends of the material to be processed are A method in which the electrodes are clamped (clamped) and then heated by generating Joule heat by applying electricity (for example, 5P3 refers to Japanese Patent Application Laid-Open No. 2002-18531 and Japanese Patent Application Laid-Open No. 2002-248525). However, in the method (A) using a heating furnace, since a heating device or a conveying device is additionally required, there is a problem that the equipment is enlarged or the cost is increased. In addition, due to 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 is significantly reduced after heating. Further, in the method for heating and holding a mold using the heater (B) described above, there is a problem that the heating temperature of the material to be processed must be limited to the tempering temperature of the mold from the viewpoint of mold life. In addition, compared with the material to be heated, the large mold has a problem of large power consumption in order to maintain the state of heating and heat preservation in advance. In addition, the method using the electrode and mold of (C) described above has a problem that it is necessary to separately provide an electric heating unit. In addition, since the mold itself is used as the electrode, there are problems that it is difficult to locally heat the material to be processed and the efficiency is not good. In addition, as in the above-mentioned (D), both ends of the material to be processed are clamped (clamped) with electrodes and then heated by Joule heat, because the material to be processed must be clamped and loosened. 'Therefore, 200524688 (3) has the problem of lowering the production speed, and it is difficult to apply it to continuous die processing. In addition, since both ends of the material to be processed are heated by electrode clamping and current application, there is a problem that it is difficult to locally heat the material to be processed. The present invention is invented to eliminate such a problem, and its object is to provide a heat-resistant material such as a magnesium alloy or a high-tensile steel that can be efficiently heated with a compact structure without requiring a special heating unit, or This is a stamping method φ method in which the steel plate for heat treatment of the mold quenching method is efficiently heated according to the material or shape, and can be easily press-formed. [Summary of the Invention] In order to achieve the above object, the punching method according to the present invention is directed to a punching method using a continuous die for punching. On the upstream side of a material feeding direction of a predetermined processing stage in one of the continuous die, At the same time when there is a stand-off stage carrier, the above-mentioned stand-off stage carrier is provided with electrodes required for conducting current to the processed material, and the above-mentioned stand-off stage carrier is processed by using the above-mentioned electrodes to conduct electricity. After the material is heated / heated, the electric heating process is performed, and then the material is processed by the above-mentioned predetermined processing stage. According to the present invention, since the material to be processed is press-processed on a predetermined processing stage, the current-carrying process is performed on the processed material at the parking station, so even if the material to be processed is magnesium alloy, titanium alloy, It is not difficult to machine materials such as f steel and high-tensile steel, and it can also be easily press-molded at the predetermined addition = -6-200524688 (4). Furthermore, since the heating process is performed at the position of the stand-off stage provided in the continuous mold, a special heating unit is not required, and the device structure can be made compact. In addition, the electric heating process is performed by the Joule heat generated by the electric current applied to the material being processed by the electrode arranged on the stage of the parking station, so the material to be processed can be efficiently heated, and the adjustment can be performed at the same time. The current applied to the material being processed, or the time of energization, the number of electrodes, etc., can be set freely according to the material of the material being processed, and by adjusting the configuration of the electrodes, the material being processed can be locally heated, even if it is not The regular material to be processed can also heat a desired part. In addition, since the energizing effect is performed in conjunction with the continuous mold, there is no problem that the processing speed of the material to be processed will be reduced due to the need to clamp and loosen the electrode as in the prior art. In addition, the movement of the material to be heated by the electric heating program is performed only between the continuous die stop station and the predetermined processing stage. The temperature drop is suppressed to a minimum, and at the same time, oxidation of the material to be processed can be prevented. In the present invention, it is preferable that the electric heating process is performed after the blanking (punching) process. In this case, since the electric heating program is performed after the blanking program, the material to be processed can be efficiently heated, and at the same time, the heat insulation% of the space generated by the blanking program in the material to be processed can be reached. It is difficult to escape the heat of the heated part to the effect of the stomach circumference. The electrode is preferably arranged at a position corresponding to the required force Q _ 200524688 (5) of the material to be processed. With this implementation, since the electrode is disposed at a portion that must be heated corresponding to the material to be processed, the material to be processed can be efficiently heated in accordance with the processing content. 51 'The electrode' is ideally able to move along the movement direction of the continuous mold while receiving the elastic force of the spring. In this way, since the electrodes are arranged so that they can move along the direction of the continuous mold while receiving the elastic force of the spring. Therefore, it is possible to alleviate the impact and impact force of the electrode when it can be applied to the processed material and contact the processed material. Therefore, the electrode and the processed material can be protected, and the contact state between the electrode and the processed material can be maintained well. In addition, by adjusting the contact position between the electrode and the material to be processed when the electrode can be energized, the contact time between the electrode and the material (the energization time) can be adjusted, thereby further adjusting the heating time. Furthermore, it is desirable that the above-mentioned empty station stage is shielded from the outside by the continuous mold when the above-mentioned heating process is performed. In this way, when the heating process is performed, the stand-off stage is shielded from the outside by a continuous mold, so the electrode can be reliably prevented from contacting people or objects, and it can be shielded from the outside. Improve your efficiency. [Embodiment] Next, a specific embodiment of a press working method according to the present invention will be described with reference to the drawings. Fig. 1 is a schematic view showing a punch of one embodiment of the present invention. -8-200524688 (6) The front view of the main part of the press. In addition, FIG. 2 is an explanatory diagram of the structure of the main part of the first current-heating mold viewed from the direction of the AA arrow in FIG. 1, where the figure (a) shows the state where electricity can be applied, and the figure (b) is View in P-P direction of (a). As shown in FIG. 1, the press machine 1 of this embodiment uses a slider driving mechanism (not shown) using a servo motor as a driving source, and can drive the slider 2 in an arbitrary displacement manner in the vertical direction. Make up. A continuous die 4 in which a plurality of dies are arranged in a row is arranged between the slider 2 and the die holder 3 in the press machine 1. A material supply device (not shown) is used to make the The material 5 to be fed into the continuous mold 4 is continuously processed in layers by the vertical driving of the slider 2. In the continuous mold 4 described above, the materials are fed in the order from the upstream side of the material feeding direction shown by the symbol F in the first figure: the first processing stage 6, the second processing stage 7, and the first emptying station. Stage (idle-st age) 8. The third processing stage 9, the second parking station stage 10, the fourth processing stage 11 and the fifth processing stage 12. Here, the so-called stand-off stage carrier in this embodiment refers to a stand-off stage that has not been punched in the stamping process, and includes a stand-off stage that cannot be avoided in the design of the mold. As well as any artificially set emptying platform carrier. Also, if the above-mentioned first vacant station carrier 8 and / or the second vacant station carrier 10 is set by using the vacant station carrier that is unavoidably provided, it will be relative to the past. The installation area of the continuous die in the press processing method can be implemented in such a manner that the installation area of the continuous die 4 in this embodiment is not increased or increased by a small amount of -9-200524688 (7). The first processing stage 6 is provided with a working punching tool 13 for performing a pierce process on the material 5 to insert a guide hole. Furthermore, an hourglass-type blanking die j 4 for performing hourglass-type blanking of the material 5 to be processed is disposed on the second processing stage 7 in order: the third processing stage 9 is disposed A first cylindrical extension processing mold 15 for performing cylindrical extension processing on the material 5 to be lowered. Further, the fourth processing stage 1 i is provided with the cylindrical material 5 further processed with the cylindrical extension processing on the third processing stage 9. A second cylindrical extension processing mold 16 for cylindrical extension processing in the opposite direction; and the fifth processing stage 12 is provided with a trimming mold 17 for trimming the workpiece 5. On the other hand, in the above-mentioned first stop station 8 and the second stop station 10, a first current-heating mold 18 and a second current-heating mold, which will be described in detail later, are respectively disposed. 1 9. Here, the respective lower molds 13a to 19a of the processing dies 13, 14, 15, 16, 17 and the respective electric heating dies 18, 19 are mounted on the lower substrate 20 fixed to the upper surface of the mold base 3. Above. In addition, the processing dies 13, 14, 15, 16, 17 and the respective upper dies 13b to 19b of the electric heating dies 18, 19 are mounted on the upper substrate 2 1 fixed to the lower surface of the slider 2. Below. A guide post 22 is interposed between the lower substrate 20 and the upper substrate 21, so that the upper substrate 21 can be moved up and down relative to the lower substrate 20 guided by the guide post 22. -10- 200524688 (8) The first current-heating mold 18 disposed on the first emptying station stage 8 is shown in FIG. 2 (a) (b), and the current is conducted to the material to be processed. The required electrode 25 is formed by interposing an insulator 26 on each of the upper and lower molds 18b and 18a. In the first electric heating mold 18, the electrodes 25 are disposed on the third processing stage 9 corresponding to the portion to be heated when the cylindrical processing is performed on the material 5 formed in a disc shape. As such, the material to be processed 5 is heated in a more efficient manner. In addition, when the first electric heating mold 18 is used to conduct the electric heating process of heating the material 5 by the above-mentioned required electrodes 25 by applying electricity, the electrodes 25 are as shown in FIG. 2 (a). The upper and lower molds 18b, 18a receiving the first current-heating mold 18 constituting a part of the continuous mold 4 shield the outside. In this way, when the electric heating process is performed, the electrodes 25 can be reliably prevented from coming into contact with people or objects, and the heating efficiency can be improved. Furthermore, in the first electric heating mold 18, the lower mold 18a is provided to be able to move up and down with respect to the lower substrate 20 along a guide (not shown), and the lower substrate 20 and the lower mold The required compression coil springs 27 are arranged between 1 8 a, so that the necessary electrodes 25 described above can receive the elastic force of the compression coil springs 27 at the same time, and can also pass along the first electric heating mold 18 Direction of movement. In this way, the impact force when the electrode 2 5 can be contacted with the material 5 to be processed can be achieved, so as to protect the electrode 2 5 ′ and the material 5 from being protected, and at the same time, the electrode 2 5 and the material to be processed are well protected. 5 & Spoon contact state. In addition, by adjusting the contact position where the electrodes 25 and the workpiece 5 can be contacted when the current can be applied, the contact time between the electrode 25 and the workpiece 5 can be adjusted (the conduction time -11-200524688 Ο)), and the heating time can be adjusted. . Instead of the compression coil spring 27, air cushion cushions or mold cushion cushion pins may be used. On the other hand, as shown in FIG. 3 (a) and (b), the second electric heating mold 19 disposed on the second idle station stage 10 conducts current to the electrode required for the material 5 to be processed. The 25 is different from the electrode 25 of the first electric heating mold 18 described above, and is formed by mounting an insulator 26 on each of the upper and lower molds 19b and 19a. The electrodes 2 5 ′ in the second current-carrying heating mold 19 are arranged on the fourth processing stage 1 1 and are further subjected to cylindrical drawing processing in the opposite direction with respect to the processing material 5 that has been subjected to drawing processing (herein The opposite direction of cylindrical extension processing is hereinafter referred to as "reverse cylindrical extension processing"), which must be heated. In this way, even the irregularly-shaped workpiece 5 can be efficiently heated in accordance with the processing content. Next, while referring to Fig. 1 and Fig. 4, the contents of the press working procedure of this embodiment will be described at the same time. Here, Fig. 4 is a diagram showing a strip layout of the press processing program of the present embodiment. In Fig. 4, the step number of each program is indicated by a symbol "K". Loss: 'For the material 5 to be fed into the continuous mold 4 by the material supply device (not shown), the work hole 6 is processed on the processing stage 6'. Two guide holes 30 (κ 1) are provided. The two guide holes 30 are formed by flattening the rolled workpiece 5 with a material supply device, and fitting the workpiece 5 with a predetermined length into the continuous mold 4. An induction positioning pin (not shown) provided in the continuous mold 4 is used to position the continuous mold 4-12-200524688 (10) a positioning hole for the position of the material 5 to be processed. Next, on the second processing stage 7, the outer periphery of the molding-prepared portion of the work material 5 is punched out by the hourglass blanking process (? 2). Then, at the first stop station 8, the workpiece 5 is clamped by the electrodes 2 5 mounted on the upper and lower molds i8b and 1 8 a, and then the current is applied. The workpiece 5 is heated to the material according to the material. The most suitable temperature (K3) for cylindrical extension processing. Then, on the third processing stage 9, a cylindrical drawing process is performed on the material 5 to be processed, and the material 5 is formed into a cup shape (K4). Also, in the above step K3, as the most suitable temperature of the material 5 to be processed, for example, when the material of the material 5 to be processed is a magnesium alloy, 250C ~ 350C; when SUS304 is 100 ° C ~ 150 ° C; When using the die hardening method of the steel plate, it is about 90 (rc.) Next, at the second stop station 10, the processed material 5 that has been formed into a cup shape in the above step K4 is installed by The electrodes 25 on the upper and lower molds 19b and 19a are clamped and then energized, and the material to be processed 5 that has been formed into a cup shape is heated to the most suitable temperature (K 5). Next, the fourth processing stage 1 1 ′ is subjected to reverse cylindrical extension processing (K6) on the material 5 to be processed in a cup shape. Then, the fifth processing stage 12 is used to process the material 5. Trim and separate into punching waste 5 a and molded product 5 b (κ 7). According to this embodiment, 'because the third processing stage 9 performs cylindrical extension processing on the material 5 to be processed, it is stopped in the first place. At the same time as the station stage 8 applies the heating process to the material 5 to be processed, Processing stage 1 1 Before performing reverse cylinder extension processing on the material 5 to be processed, before the 2nd -13- 200524688 (11) the emptying of the stage 10, the heating process is performed on the material 5 to be processed. The processing material 5 is a difficult-to-machine material such as magnesium alloy, titanium alloy, stainless steel, and high-tensile steel. All can be easily subjected to cylindrical extension processing on the third processing stage 9 and reverse cylinder extension on the fourth processing stage 11. Processing: 'Electrical heating procedures at the empty stations 8 and 10 are performed after the hourglass-type blanking process has been performed on the second processing station 7', so it can be more efficient. The material 5 is heated, and at the same time, the heat insulation effect of the space η, Η '(see Fig. 4) generated by the material 5 by the hourglass blanking process can be achieved, so that the material 5 can be processed. The heat of the heated part is difficult to escape to the surrounding effect. Furthermore, according to this embodiment, it has the following advantages. That is: (1) Each of the above-mentioned electrification heating procedures is performed at each stop provided in the continuous mold 4. Empty Workbenches 8, 10 Since the installation is performed, no special heating unit is required, so that the structure of the device can be compacted. (2) Each of the above-mentioned electrification heating procedures is arranged on each of the empty stations 8 and 10 The electrode 25 performs Joule heat generated by the energization of the material 5 to be processed, so that the material 5 can be efficiently heated, and at the same time, the current applied to the material 5 can be adjusted, or the current application time, number of electrodes, etc. The heating temperature can be freely set according to the material of the material 5 to be processed. (3) Since the energizing effect of the electrode 2 and the material 5 to be processed is linked to the movement of the continuous mold 4, the production speed does not decrease. -14- 200524688 (12) (4) The conveying operation of the material 5 to be heated which is subjected to the electric heating process, because only in the first die station 8 and the third processing stage 9 of the continuous mold 4 And between the second emptying stage 10 and the fourth processing stage 11, the temperature drop of the processed material 5 after being heated is suppressed to a minimum, and the processed material 5 can be prevented Oxidation. The Ming is right, the single drawing department is the first type of mechanical drawing machine. ^ Pressing the Mingfa, the explicit mode, and the diagram are shown in the form of a punch.-Eye and arrow diagram A Ming a) A- Saying C The diagram is made as 1 structure 3 b part 丨 from the diagram; ， the shape of the diagram 2 the thermoelectricity and electricity can be used to show 1 is the first one} Observe the direction of the graph as C to the Chinese side a 通 示 2 显 第 为之 查 (a view of the picture to the Chinese side, the arrow diagram B Ming B said the figure made 1 structure of the first part of the reason, with a model 3 with Dire plus tune the state ' The 4th figure of the dog picture. The original picture Q is the UUUI ο the sequence of the direction of the drawing. The process of pressurization \) / a C punch is in the form of} Yuan Yao main equipment machine die block continuous punching slip die company -15- 200524688 (13) 5: material to be processed 6: 1st processing stage 7: 2nd processing stage 8: 1st empty station stage 9: 3rd processing stage 1 〇: 2nd empty station stage 1 1: 4th processing stage 1 2: 5th processing stage 1 3: Perforation processing molds 13a to 19a: lower mold 13b 19b: Upper mold 1 4: Hourglass-type blanking mold 15: First cylinder extension processing mold 16: Second cylinder extension processing mold 17: Edge trimming mold 1 8, 19: Electric heating mold 20: lower substrate 2 1: upper substrate 22: guide post 25: electrode 2 6: insulator 27: coil spring 3 0: guide hole F: feed direction -16-