200401680 (1) 玖、發明說明 【發明說明】 本專利申請，是相應於20〇2年3月26日所申請的日本 \ 專利申請之特願2002 - 8 6296號及2002年4月23日所申請的 美國暫定申請第60/3 7452 1號的優先權主張，其發明內容 是直接用來構成本專利申請的一部分。 【相關申請之表不】 本發明，是根據2〇〇2年4月23日美國專利法第！〗〗條（ H b )之規定對於所申請的美國暫定申請第6 0 / 3 7 4 5 2 1號，牛艮 據美國專利法第1 1 9條（e )( 1 )主張申請日之利益，根 據美國專利第1 1 1條（a )之規定所申請。 【發明所屬之技術領域】 本發明，是有關具有細微形狀之模具構件之加工方法 ’模具構件之製造方法，擠製模，擠製材之製造方法及濟 製材。 鲁 【先前技術】 一般而言，模具構件也就是擠製模等，如熱間模鋼或 超硬合金使用耐摩耗性優異的材料。此等材料是堅硬，加 工困難，一般而言由於材料強度不要阻礙加工性多數使用 金屬線放電加工或形彫放電加工將放電現象作爲加工原理 的加工方法。 -6- 200401680 (2) 可是，放電加工，是藉由放電因爲利用材料之熱性的 熔融除去現象，所以在加工物表面會形成與母材性質不同 的熔融殘留層（加工變質層）。 該層，是藉由熔融，急冷使組織變態，含微縫或硬化 層（油中加工的情況），軟化層（水中加工的情況），拉 力殘留應力。在擠製模加上高壓，所以在表面存在這樣的 熔融殘留層作爲破壞之起點使微縫產生作用，會有使模壽 命變短的問題。又，進行表面處理的情況下，也成爲表面 處理層剝離的原因，也會有使表面處理壽命變短之問題。 是以，在放電加工後存在模具構件之被加工部分的表 面之熔融殘留層因爲就模具構件來說是有害，一般而言， 在放電加工後進行除去熔融殘留層。 先前技術，作爲這樣的模具構件之熔融殘留層的除去 方法，提出專利申請有藉由砂紙硏磨，藉由氣體硏磨，硬 粒噴砂，滾筒加工，珩磨等除去方法（譬如日本特開平 10- 1 5 6424號公報，特開平1 1 - 1 23444號公報，特開平 11- 244934號公報，特開平11- 277131號公報）。又，也 被提出專利申請有藉由電解硏磨除去的方法（譬如日本特 開平9 - 41 123號公報）。 可是，如上述熔融殘留層的除去方法，放電加工方法 譬如具有含溝寬未達〇 · 3 mm溝之微細形狀的情況下，除 了不能對應於前述微細形狀之外，當除去處理時產生接觸 狀態強的部位，弱的部位在加工形狀產生塌角，會有使加 工尺寸精密度下降的問題。 200401680 (3) 又’藉由電解硏磨除去方法，模具材料爲超硬合金的 情況’由於電解腐蝕因爲發生優先除去的部分，所以將材 料特性會有不能充分引出的問題。 又’藉由一般之硏削盤來除去，在微細的加工形狀之 情況下要進行充分的除去處理有所困難。具體而言，對於 溝寬0 · 3 mm程度之微細形狀部分要進行深（譬如寬度J 〇 倍以上）範圍的除去處理有所困難。而且，作爲使用於除 去處理的工具，使用一般性的圓盤狀工具，則會限定進行 除去處理的範圍，或使用圓盤狀以外之剖面圓柱形狀或角 柱形狀的工具情況下，工具直徑未達〇 · 3 mm則將工具要 筆直安裝於硏削盤上會形成困難，由於偏心產生偏負荷會 破壞工具，不能滿足進行除去處理的問題。 本發明之目的，是提供將具有細微形狀之模具構件的 前述微細形狀部分之熔融殘留層（加工變質層），可均勻 地精密度良好加以除去，可謀求長壽命化，高功能化的模 具構件之加工方法，模具構件之製造方法，擠製模，擠製 材之製造方法及擠製材。 【發明內容】 本發明之第1項，一種模具構件之加工方法，其特徵 爲：將產生於模具構件所放電加工之加工部分的表面之熔 融殘留層’藉由金屬線放電硏削法使用所製作的工具加以 除去。 於此，金屬線放電硏削法，是放電加工法的一種，其 -8- 200401680 (4) 特徵爲（1 )形成工具，利用使用金屬線電極的放電現象 ，但引導金屬線電極線的金屬線導板因爲將倒轉金屬線電 極，所以藉由工具成形時之加工（放電）反力，不會降低 工具精密度，（2 )在工具成形因爲使用金屬線電極線， 經常以新的面進行成形，不會影響電極材料的消耗，（3 )藉由放電現象加工法，所以若連導電性可確保的話，則 無關材料硬度可加工，因此，可容易製作比燒結金剛石或 鎢，超硬合金等之模材料更硬的工具。又，由上述（1 ) 、（2 )之理由，亦可製造加工精密度高的微小工具。 若依據這樣的金屬線放電硏削法，則可製作加工精密 度高的微小工具，使用這種工具，藉由模具構件之放電加 工由於可除去產生於加工部的熔融殘留層，所以將該熔融 殘留層可均勻又高精密度的除去。 本發明之第2項，一種模具構件之製造方法，其特徵 爲：將加工材料放電加工之後，將產生於加工部分之表面 的熔融殘留層，藉由金屬線放電硏削法使用所製作的工具 加以除去。 若依據這種模具構件之製造方法，則可製作加工精密 度高且高硬度的微小工具，使用這種工具，藉由放電加工 由於可除去產生於加工部的熔融殘留層，所以可製造既均 勻且高精密度除去該熔融殘留層的模具構件。 本發明之第3項，一種擠製模，其特徵爲：產生於放 電加工之加工部分的表面之熔融殘留層，藉由金屬線放電 硏削法使用所製作的工具可除去。 200401680 (5) 這種 ，由於可 勻又高精 本發 :產生於 金屬線放 ，可擠製 若依 密度除去 以可獲得 本發 電加工之 硏削法使 這種 之熔融殘 高表面性 本發 說明可更 【實施方 以下 面加以說 本實 藉由這種 m 八 ， -ί* ώ. / 擠製模，使用加工精密度高且高硬度的微小χ胃 除去產生於放電加工部的熔融殘留層，所以既g 密度除去該熔融殘留層可實現長壽命且高功能。 明之第4項，一種擠製材之製造方法，其特徵爲 放電加工之加工部分的表面之熔融殘留層，藉g 電硏削法使用所製作的工具可除去並使用擠製丰莫 鋼環坯（billet )。 據這種擠製材之製造方法，則使用既均勻又高精 放電加工部之熔融殘留層的擠製模進行擠製，戶斤 尺寸精密度亦高表面性狀亦優異的擠製材。 明之第5項，一種擠製材，其特徵爲：產生於放 加工部分的表面之熔融殘留層，藉由金屬線放電 用所製作的工具可除去並藉由擠製模所擠製。 擠製材，藉由既均勻又高精密度除去放電加工部 留層的擠製模所擠製，所以可獲得尺寸精密度亦 狀亦優異的擠製材。 明之其他目的及特徵，藉由參考檢送圖式的以下 加明瞭。 式】 ’將本發明之一實施形態，一方面參考圖式一方 明。 施形態，是顯示模具構件爲擠製模的情況。又， 擠製模所製造的濟製材，如第8圖所示，介於間 -10- 200401680 (6) 隔壁20 1使多數微細中空部202列設於寬度方向之鋁（含其 合金）製扁平多孔管200，使用於熱交換器之冷媒流通用 的熱交換管。 第1圖是顯示有關本發明一實施形態之擠製模1的心軸 2斜視圖。第2圖是將同樣擠製模之陰型模3從擠製方向後 方（入側）視的前視圖。第3圖是組合陰型模3及心軸2之 狀態下的第1圖之III - III線剖面圖，第4圖是第3圖之 IV - IV線剖面圖。 第1圖至第4圖中，前述陰型模3，在其擠製方向後面 之中央部，具有對應於鋁管外圍形狀的扁平開口部3 1，並 且以連通於該開口部3 1的態樣，形成貫通陰型模3之軸方 向的擠製材通過孔3 2。又，在前述開口部3 1之緣部，形成 規定鋁管外圍面的軸承部3 3。 其中一方，前述心軸2，具有：扁平狀之心軸本體2 1 、及從心軸本體2 1之前端部一體突出成串齒狀，在寬度方 向（第4圖的左右方向）隔著溝部1 2所列設的複數個柱狀 體22。 與前述心軸本體21之前述柱狀體22的連設部23 ’厚度 方向（第4圖的上下方向）之兩外面朝向前端形成尖細的 傾斜面，當擠製時心軸本體2 1之厚度方向兩側的成形材料 ，朝向柱狀體22形成容易流入。 前述柱狀體22，因爲分別形成前述鋁管2〇〇的中空部 2 0 2，其前端部的形狀，對應於前述各中空部2 0 2之剖面形 狀，柱狀體22之前端外圍部，形成用來規定前述鋁管1〇〇 200401680 (7) 之中空部內圍面的軸承部2 5 ° 又，前述柱狀體22之寬度，在本實施形態，是從基端 部到軸承部2 5爲止爲一樣’且寬度方向之兩側面（溝部1 2 之內面）2 6到軸承部爲止形成無段差的平坦面。 含前述心軸2中之溝部12的柱狀體22之形狀，是藉由 已知的放電加工所形成。又，陰型模3之開口部3 1亦藉由 放電加工所形成。藉由該放電加工’在放電加工面產生熔 融殘留層（加工變質層）。因此，本實施形態在放電加工 後，使用預定工具進行前述熔融殘留層的除去處理。對於 這一點後面陳述。 上述構成之心軸2，使其柱狀體2 2之前端的軸承2 5及 陰型模3之軸承部3 3形成對向，將柱狀體22之前端部面臨 陰型模3的開口部3 1所配置，來構成擠製模1。除此之外， 心軸2，根據必要在未圖示支承體藉由燒嵌等在固定支承 的狀態下與陰型模3組合亦可。 追種狀態下，在固定擠製模1之未圖不的外殼，用來 裝塡作爲成形材料之鋁鋼環坯，根據一般方法實施擠製。 藉由推壓鋁成形材料流入到心軸2的厚度方向兩側，從柱 狀體22之軸承部25及陰型模的軸承33之間的間隙來擠製， 同時亦供給到鄰接柱狀體22彼此之間的溝部1 2，從溝部前 端（鄰接柱狀體22之軸承部25間的間隙）所擠製。而且， 藉由連續地擠製成形材料，來製造如第8圖所示之斷面形 狀的鋁擠製管200。 前述心軸2及陰型模3，從模用原盤藉由金屬線放電或 200401680 (8) 形彫放電之放電加工法成形爲所要形狀，所要尺寸。模材 料並無特別限定，可適當使用可放電加工的各種超硬合金 ’導電性陶瓷，非導電性陶瓷（藉由補助電極法可放電加 工）’各種彳旲鋼等。以追樣的材料在所成形的心軸2及陰 型模3之加工面將所形成的熔融殘留層，藉由金屬線放電 硏削法使用所製作的工具加以除去。 第5圖是顯示熔融殘留層之除去裝置的斜視圖。該除 去裝置’是用來製作前述工具並兼用金屬線放電硏削裝置 。又，第6圖是當工具製作時將工具部分改變角度放大狀 態的斜視圖。 第5圖所示之熔融殘留層的除去裝置，具備有：自由 移動於水平面內之Y軸方向的下側載物台5 i ;在該下側 載物台5 1上自由移動地設於水平面內之X軸方向的上側 載物台5 2 ;設於該上側載物台5 2之加工液充塡用的加工槽 5 3，固疋於上側載物台5 2之金屬線放電硏削單元5 4 ;及可 移動於上下（Z軸方向）且可旋轉的工具安裝工具55;藉 由前述上下側載物台5 2、5 1使前述加工槽5 3及金屬線放電 硏削單元54在水平面內形成自由移動。而且，在前述加工 槽53之預定位置，固定有作爲除去熔融殘留層之被加工構 件的心軸2。本實施形態，是用來除去前述心軸2之溝12內 面的熔融殘留層。 首先，當工具製作時，在前述工具安裝工具55之下端 部，安裝工具材料60。又，前述金屬線放電硏削單元54， 如第6圖所示，具備：金屬線導板5 4 1、及沿著該金屬線導 200401680 Ο) 板5 4 1慢慢連續地行走之直徑0 · 1 m m程度的金屬線5 4 2， 將該金屬線5 42作爲加工電極使用，將金屬線542與工具材 料60之對向部作爲放電部543，進行安裝於工具安裝工具 5 5之工具材料6 0的放電加工。 當放電加工時，前述金屬線導板541將金屬線542對工 具材料60因爲從後方來支承，當工具成形時藉由加工（放 電）反力，不會使工具加工精密度下降之外，將連續地供 給金屬線5 4 2因爲使用於用來工具成形的電極，所以金屬 線5 4 2 —直在新的面可進行成形，具有不會影響電極材料 消耗的優點，因此，加工精密度亦高可製造如5微米（# )微小的工具。而且，藉由放電現象的加工法，所以若連 導電性可確保的話，則無關材料硬度可加工，因此，可容 易製作與燒結金剛石或鎢，超硬合金等之模材料同等硬度 或以上硬度的工具，具有這樣的優點。 本實施形態，工具70，是將與模材料同等以上硬度的 材料譬如燒結金剛石，藉由加工形成比溝1 2之寬度G更 小直徑的剖面圓形。此外，在形成剖面圓形的工具70，一 方面使工具材料旋轉一方面進行金屬線放電硏削即可。又 ’工具7 0之剖面形狀並不限定於圓形，當熔融殘留層之除 去加工時爲了提高加工屑的排出效率，亦可設定成剖面角 柱或其他形狀。形成剖面角柱狀工具的情況下，不用使工 具材料6 0連續地旋轉若加工工具材料側面即可。 工具70製作後，進行產生於前述心軸2之溝部12內面 (加工面）26的熔融殘留層之除去處理。該除去處理，是 -14- 200401680 (10) 在前述工具7 0下方位置使心軸2之被加工部位進行定位， 使上下側載物台5 2、5 1移動，並且一邊組合一邊進行工具 安裝工具55之上下運動及旋轉運動，及藉由上下側載物台 5 2、5 1在軸心2的ΧΥ平面內移動。 第7圖是顯示使用藉由金屬線放電硏削法所製作的工 具7 0來除去熔融殘留層狀態之斜視圖。 本實施形態，將前述工具70從前端側嵌入到溝部1 2使 接觸於溝部12內面26的狀態下，使前述工具安裝工具55移 動於上下（Ζ軸方向）一邊將工具7 0逼進粗箭頭所示溝部 1 2的深度方向，一邊藉由上下側載物台5 2、5 1之移動使前 述工具7 0移動到細箭頭所示溝部1 2的長度方向基端側，來 完全地硏削除去溝部12之內面26的熔融殘留層。工具70由 於以高硬度加工成高精密度，所以不會產生工具70及溝部 內面26接觸不均勻的現象，將溝部12之尺寸一邊可維持高 精密度一邊可除去熔融殘留層。又，由於將工具70可製作 成微小的工具，所以溝部I2之寬度譬如〇、〇3mm以上未 達0 · 3 mm的微細形狀但亦可除去熔融殘留層。更佳，對 於具有溝寬〇 · 〇 5〜0 · 2 5 mm之溝的微細形狀使用前述工 具7 0進行除去熔融殘留層爲佳。而且，工具70從工具製作 階段安裝於工具安裝工具5 5的狀態下，未被卸下，所以藉 由工具7 0之偏心安裝亦無發生偏負荷等問題，可均勻除去 熔融殘留層。200401680 (1) 发明 Description of the invention [Explanation of the invention] This patent application corresponds to Japanese Patent Application No. 2002-8 6296 filed on March 26, 2002 and filed on April 23, 2002. The claimed priority of the United States Provisional Application No. 60/3 7452 1 is for the purpose of forming a part of this patent application. [List of related applications] The present invention is based on the United States Patent Law No. 23, April 23, 2002! The provisions of Article 〖〗 (H b) for the proposed US provisional application No. 60/3 7 4 5 21, Niu Gen claims the benefit of the filing date according to Article 1119 (e) (1) of the US Patent Law , Applied in accordance with the provisions of Article 11 (a) of the United States Patent. [Technical field to which the invention belongs] The present invention relates to a method for processing a mold member having a fine shape ′ a method for manufacturing a mold member, an extrusion die, a method for manufacturing an extruded material, and a material. Lu [Previous Technology] Generally speaking, mold members are also extrusion dies, such as hot die steel or cemented carbide, which use materials with excellent abrasion resistance. These materials are hard and difficult to process. Generally speaking, due to the strength of the material, do not hinder the workability. Most of them use wire electrical discharge machining or sculpting electrical discharge machining as the processing principle. -6- 200401680 (2) However, electrical discharge machining uses the thermal melting of the material to remove the phenomenon. Therefore, a molten residual layer (processing deterioration layer) with different properties from the base material is formed on the surface of the workpiece. This layer deforms the structure by melting and rapid cooling, contains micro-slits or hardened layers (in the case of oil processing), softened layers (in the case of water processing), and residual tensile stress. High pressure is applied to the extrusion die. Therefore, the existence of such a molten residual layer on the surface as a starting point of failure causes micro-slits to act, and there is a problem that the die life is shortened. In addition, when the surface treatment is performed, it also causes the surface treatment layer to peel off, and there is also a problem that the surface treatment life is shortened. Therefore, the molten residual layer on the surface of the processed part of the mold member after the electric discharge machining is harmful to the mold member. Generally, the molten residual layer is removed after the electric discharge machining. In the prior art, as a method for removing the molten residual layer of such a mold member, a patent application has been filed for removal methods such as sandpaper honing, gas honing, hard blasting, roller processing, honing, and the like (for example, Japanese Patent Laid-Open No. 10- 1 5 6424, Japanese Unexamined Patent Publication No. 1 1-1 23444, Japanese Unexamined Patent Publication No. 11-244934, Japanese Unexamined Patent Publication No. 11-277131). In addition, a patent application has also been filed for removal by electrolytic honing (for example, Japanese Patent Application Laid-Open No. 9-41 123). However, as in the above-mentioned method for removing the molten residual layer, for example, in the case of an electric discharge machining method having a fine shape with grooves having a width of not more than 0.3 mm, in addition to not being able to correspond to the aforementioned fine shape, a contact state occurs during removal processing The strong part and the weak part have a sag in the processing shape, and there is a problem that the precision of the processing size is reduced. 200401680 (3) "When the mold material is super-hard alloy by electrolytic honing removal method" Because electrolytic corrosion preferentially removes parts, there is a problem that the material characteristics cannot be sufficiently elicited. In addition, it is removed by a general chisel plate, and it is difficult to perform a sufficient removal process in the case of a finely processed shape. Specifically, it is difficult to perform a deep (for example, a width of J 0 or more) range of the finely shaped portion having a groove width of about 0.3 mm. In addition, as a tool used for the removal process, a general disc-shaped tool is used to limit the range of the removal process, or when a tool other than a disc-shaped cross-sectional cylindrical shape or a corner cylindrical shape is used, the tool diameter is less than 0.3 mm, it is difficult to mount the tool straight on the countersink. The eccentric load caused by the eccentric load will damage the tool, and it cannot satisfy the problem of removal treatment. An object of the present invention is to provide a molten residual layer (processing deterioration layer) of the aforementioned finely-shaped portion of a mold member having a fine shape, which can be removed uniformly and with good precision, and a mold member having a long life and high functionality can be achieved. Processing method, manufacturing method of die member, extrusion die, manufacturing method of extrusion material, and extrusion material. [Summary of the Invention] The first aspect of the present invention is a method for processing a mold member, characterized in that: a molten residual layer generated on the surface of a processed portion of the mold member by electric discharge machining is used by a wire electric discharge cutting method. The tools made are removed. Here, the electric wire discharge cutting method is a kind of electric discharge machining method, which is characterized by (1) forming a tool and utilizing a discharge phenomenon using a wire electrode, but guiding the metal of the wire electrode wire Since the wire guide plate will invert the metal wire electrode, the machining (discharge) reaction force during the forming of the tool will not reduce the precision of the tool. (2) Because the wire electrode wire is used in the forming of the tool, it is often carried out with a new surface. Forming does not affect the consumption of electrode materials. (3) Through the discharge phenomenon processing method, if the conductivity can be ensured, the hardness of the material can be processed regardless of the hardness. Therefore, it is easier to produce than hard cemented diamond or tungsten. Equal-mould materials are harder tools. In addition, for the reasons (1) and (2) described above, it is possible to manufacture microtools with high processing precision. According to such a wire electric discharge cutting method, a micro tool with high processing precision can be produced. Using this tool, the molten residual layer generated in the processed portion can be removed by electric discharge machining of the mold member, so the molten The residual layer can be removed uniformly and with high precision. The second aspect of the present invention is a method for manufacturing a mold member, which is characterized in that after the machining material is subjected to electric discharge machining, a molten residual layer generated on the surface of the machining portion is used by a wire electric discharge cutting method to use the produced tool Remove it. According to the manufacturing method of such a mold member, a micro tool with high processing precision and high hardness can be produced. With this tool, the molten residual layer generated in the processed portion can be removed by electric discharge machining, so that it can be manufactured uniformly. And the mold member which removes this molten residual layer with high precision. According to the third aspect of the present invention, an extrusion die is characterized in that a molten residual layer generated on a surface of a processed portion of an electric discharge machining can be removed by a wire electric discharge cutting method using a tool produced. 200401680 (5) This is because it can be uniform and high-precision hair: It is produced by metal wire and can be extruded. If it is removed by density to obtain this power generation process, the molten residue will have high surface texture. The description can be more detailed. [The embodiment will be described below. With this m ，, -ί * FREE. / Extrusion mold, using a small χ stomach with high processing precision and high hardness to remove the molten residue generated in the discharge processing section. Layer, so removing this molten residual layer with both g density can realize long life and high function. Item No. 4 of the Ming Dynasty is a method for manufacturing an extruded material, which is characterized by a molten residual layer on the surface of the processed part of the electrical discharge machining. The extruded Feng Mo steel ring billet can be removed by using the tool produced by the g electric milling method ( billet). According to the manufacturing method of the extruded material, the extruded material is extruded by using an extruding die having a uniform and high-precision molten residual layer in the EDM section. The extruded material has high dimensional accuracy and excellent surface properties. Item 5 of the Ming is an extruded material, characterized in that a molten residual layer generated on the surface of a processing portion can be removed by a wire discharge tool and extruded by an extrusion die. The extruded material is extruded by an extrusion die that removes the remaining layer of the EDM section with high precision and uniformity, so that an extruded material with excellent dimensional accuracy and excellent shape can be obtained. Other purposes and characteristics of the description will be made clear by referring to the following submission pattern. An embodiment of the present invention will be described with reference to the drawings. This embodiment shows the case where the die member is an extrusion die. In addition, as shown in FIG. 8, the product made of an extrusion die is made of aluminum (including its alloy) in which a plurality of fine hollow portions 202 are arranged in the width direction between -10- 200401680 (6) the partition wall 20 1. The flat perforated tube 200 is a heat exchange tube that is generally used for refrigerant flow in a heat exchanger. Fig. 1 is a perspective view showing a mandrel 2 of an extrusion die 1 according to an embodiment of the present invention. Fig. 2 is a front view of the female die 3 of the same extrusion die as viewed from the rear (inside) of the extrusion direction. Fig. 3 is a sectional view taken along line III-III of Fig. 1 in a state where the female mold 3 and mandrel 2 are combined, and Fig. 4 is a sectional view taken along line IV-IV of Fig. 3. In FIGS. 1 to 4, the female die 3 has a flat opening 31 corresponding to the shape of the outer periphery of the aluminum tube at a central portion behind the extrusion direction, and communicates with the opening 31. In this way, an extruded material passing hole 32 is formed which penetrates the axial direction of the female mold 3. A bearing portion 33 is formed at an edge portion of the opening portion 31 to define an outer surface of the aluminum tube. On one side, the mandrel 2 includes a flat mandrel body 2 1 and a series of teeth protruding integrally from the front end of the mandrel body 21, with a groove portion interposed therebetween in the width direction (left-right direction in FIG. 4). A plurality of columnar bodies 22 are listed in 1 2. The outer surfaces of the connecting portions 23 ′ in the thickness direction (up and down direction in FIG. 4) of the connecting portion 23 with the cylindrical body 22 of the mandrel body 21 form a tapered inclined surface toward the front end. The molding material on both sides in the thickness direction is formed to flow toward the columnar body 22 easily. Because the columnar body 22 forms the hollow portion 202 of the aluminum tube 200, the shape of the front end portion corresponds to the cross-sectional shape of the hollow portion 202, and the front peripheral portion of the columnar body 22, The bearing portion 25 for defining the inner surface of the hollow portion of the aluminum tube 100200401680 (7) is formed. The width of the columnar body 22 in this embodiment is from the base end portion to the bearing portion 2 5 It is the same so far, and the two side surfaces in the width direction (the inner surface of the groove portion 1 2) 2 6 form a flat surface without a step up to the bearing portion. The shape of the columnar body 22 including the groove portion 12 in the mandrel 2 is formed by a known electric discharge machining. The opening 31 of the female mold 3 is also formed by electrical discharge machining. By this electric discharge machining ', a molten residual layer (processed deformed layer) is generated on the electric discharge machined surface. Therefore, in the present embodiment, after the electric discharge machining, the above-mentioned removal process of the molten residual layer is performed using a predetermined tool. This is stated later. The mandrel 2 configured as described above faces the bearing 25 at the front end of the columnar body 2 2 and the bearing portion 3 3 of the female mold 3 so as to face the front end of the columnar body 22 toward the opening 3 of the female mold 3. 1 to configure the extrusion die 1. In addition, the mandrel 2 may be combined with the female mold 3 in a state where the support body is fixedly supported by firing or the like, as necessary, if necessary. Under the state of seeding, an unillustrated outer shell of the fixed extrusion die 1 is used for mounting an aluminum-steel ring blank as a molding material, and extrusion is performed according to a general method. The aluminum molding material is pushed into both sides of the mandrel 2 in the thickness direction, extruded from the gap between the bearing portion 25 of the columnar body 22 and the bearing 33 of the female mold, and is also supplied to the adjacent columnar body. The groove portions 12 between 22 are extruded from the front end of the groove portion (the gap between the bearing portions 25 adjacent to the columnar body 22). Further, the extruded aluminum material 200 is manufactured by continuously extruding the formed material as shown in Fig. 8. The above-mentioned mandrel 2 and the female mold 3 are formed into a desired shape and a desired size from an original plate of the mold by electric wire discharge or 200401680 (8) shape discharge discharge. The material of the mold is not particularly limited, and various superhard alloys ‘conductive ceramics that can be processed by electric discharge, non-conductive ceramics (which can be discharged by the auxiliary electrode method), and various types of sintered steel can be used as appropriate. The molten residual layer formed on the processed surfaces of the formed mandrel 2 and the female mold 3 with the material to be sampled was removed by a wire discharge cutting method using a tool produced. Fig. 5 is a perspective view showing an apparatus for removing a molten residual layer. This removing device 'is used to make the aforementioned tool and also serves as a wire electric discharge cutting device. Fig. 6 is an oblique view showing a state where the tool portion is changed in angle when the tool is made. The apparatus for removing a molten residual layer shown in FIG. 5 includes a lower stage 5 i freely moving in the Y-axis direction in a horizontal plane, and the lower stage 51 is provided on the horizontal plane so as to be freely movable. The upper stage 5 2 in the X-axis direction of the inner side; the processing tank 5 3 for filling the processing liquid in the upper stage 5 2 is fixed to the wire discharge discharge unit of the upper stage 5 2 5 4; and a tool installation tool 55 that can be moved up and down (Z-axis direction) and can be rotated; the above-mentioned upper and lower side stages 5 2 and 5 1 make the machining groove 5 3 and the wire electric discharge cutting unit 54 at Free movement in the horizontal plane. A mandrel 2 is fixed to a predetermined position of the processing groove 53 as a member to be processed to remove a molten residual layer. In the present embodiment, the molten residual layer on the inner surface of the groove 12 of the mandrel 2 is removed. First, when the tool is manufactured, a tool material 60 is mounted on the lower end of the aforementioned tool mounting tool 55. In addition, as shown in FIG. 6, the metal wire discharge cutting unit 54 includes a metal wire guide plate 5 4 1 and a diameter 5 0 1 along which the metal wire guide plate 4 400 1 walks slowly and continuously. · 1 mm metal wire 5 4 2, the metal wire 5 42 is used as a processing electrode, and the opposing part of the metal wire 542 and the tool material 60 is used as the discharge part 543 to be mounted on the tool material of the tool mounting tool 5 5 6 0 electrical discharge machining. During electrical discharge machining, the aforementioned metal wire guide plate 541 supports the metal wire 542 to the tool material 60 from the rear. When the tool is formed, the machining (discharge) reaction force does not reduce the precision of the tool. The metal wire 5 4 2 is continuously supplied because it is used for the electrode for tool forming, so the metal wire 5 4 2 can be formed directly on a new surface, which has the advantage of not affecting the electrode material consumption. Therefore, the processing precision is also Highly-manufacturable tiny tools such as 5 microns (#). In addition, the discharge phenomenon is used to process the material without affecting the hardness of the material if the conductivity can be ensured. Therefore, it is easy to produce materials with hardness equal to or higher than that of sintered diamond, tungsten, and cemented carbide. Tools have such advantages. In this embodiment, the tool 70 is formed by processing a material having a hardness equal to or higher than that of the mold material, such as sintered diamond, to form a circular cross section having a smaller diameter than the width G of the groove 12. In addition, in forming the tool 70 having a circular cross-section, it is sufficient to rotate the tool material while performing wire discharge cutting. Also, the shape of the cross section of the tool 70 is not limited to a circular shape. In order to improve the efficiency of discharging the machining chips during the removal of the molten residual layer, it can also be set to a cross-section angle pillar or other shapes. In the case of forming a corner tool with a cross-section angle, it is not necessary to continuously rotate the tool material 60 to process the side surface of the tool material. After the tool 70 is manufactured, the molten residual layer generated on the inner surface (processed surface) 26 of the groove portion 12 of the mandrel 2 is removed. This removal process is -14-200401680 (10) Positioning the processed part of the mandrel 2 at the position below the tool 70, moving the upper and lower stages 5 2, 5 1 and mounting the tool while assembling The tool 55 moves up and down and rotates, and moves in the XY plane of the axis 2 by the upper and lower side stages 5 2 and 5 1. Fig. 7 is a perspective view showing a state in which a molten residual layer is removed by using a tool 70 manufactured by a wire discharge cutting method. In the present embodiment, the tool 70 is inserted into the groove portion 12 from the front end side and brought into contact with the inner surface 26 of the groove portion 12, and the tool mounting tool 55 is moved up and down (Z-axis direction) while pushing the tool 70 into the rough portion. The depth direction of the groove portion 12 shown by the arrow is moved by the upper and lower stages 5 and 5 to move the tool 70 to the base end side of the groove portion 12 shown by the thin arrow in the length direction, so as to fully stab. The molten residual layer on the inner surface 26 of the groove portion 12 is removed. Since the tool 70 is processed to high precision with high hardness, there is no uneven contact between the tool 70 and the inner surface 26 of the groove portion, and the molten residual layer can be removed while maintaining the size of the groove portion 12 with high precision. In addition, since the tool 70 can be made into a minute tool, the width of the groove portion I2 is, for example, a fine shape of 0 mm or more and less than 0.3 mm, but the molten residual layer can be removed. More preferably, for a fine shape having grooves having a groove width of 0. 5 to 0. 25 mm, it is preferable to remove the molten residual layer using the aforementioned tool 70. In addition, the tool 70 has not been removed from the state in which it was mounted on the tool mounting tool 55 from the tool manufacturing stage. Therefore, the eccentric mounting of the tool 70 does not cause problems such as eccentric load, and the molten residual layer can be uniformly removed.
藉由如上述的工具7 〇之熔融殘留層的硏削除去加X， 亦可使用磁粒進行，亦可不使用砥粒進行。又，非以研:肖[J -15- 200401680 (11) ，亦可藉由超音波加工除去。該超音波加工，是在被加工 構件之加工面2 6及工具7 0之間賦予砥粒的狀態下，在工具 7 0賦予超音波振動，來除去熔融殘留層的方法。 • 又，除去加工，不一定必須實施放電加工面之全體， 集中擠製時的應力僅在容易破損的部分實施即可。 進而，在熔融殘留層之除去前，作爲前處理，亦可在 被加工構件之加工面進行微放電加工。微放電加工因爲其 加工能源微小，所以可減薄產生於加工面的熔融殘留層。 又，實施電解加工（含離子交換水的加工）或表面氧化處 理，將熔融殘留層變脆放著，藉由前述工具7 0亦可容易進 行熔融殘留層的除去處理。 上述實施形態，顯示除去心軸2之溝部12的內面26之 熔融殘留層的情況，但對於陰型模3之開口部3 1的內周面 也就是軸承部33，或其他心軸2或陰型模3之放電加工面， 適當除去熔融殘留層即可。 除去放電加工面之熔融殘留層的擠製模1，亦可直接 使用，或以改善擠製材之表面性狀等目的，亦可在除去熔 融殘留層之加工面實施表面處理。由於高精密度且均勻地 除去熔融殘留層，所以增大表面處理披膜的密著性，可提 高表面處理披膜的耐久性。 此外，以上實施形態中，顯示模具構件爲擠製模的情 況，但在其他模具構件當然亦可適用本發明。 【實施例】 -16 - 200401680 (12) (實施例1 ) 爲了顯示有關本實施形態之效果，進行如下的試驗° 即，如第8圖所示使剖面矩形之中空部202將列設於寬 度方向的鋁管200作爲擠製模1，準備4個由具備具有剖面 矩形之柱狀體22的心軸2之模鋼而成。於此，將柱狀體22 之軸承部2 5的高度設定爲0 · 7mm，將寬度W (第1圖b ) 設定爲〇 · 4mm，將鄰接柱狀體22間之溝部12的寬度G設 定爲0 · 1 mm，將陰型模3之開口部3 1的長度設定爲1 6、 0mm，將開口部31之高度（寬）設定爲1mm，模加工是藉 由放電加工進行。 而且，對於1個模，將含溝部12之內面26的放電加工 面之熔融殘留層，使用藉由金屬線放電硏削法所製作的燒 結金剛石製之剖面圓形的工具（直徑〇 · 〇8mm )以硏削法 (不使用砥粒）來除去。工具70安裝於工具安裝工具5 5使 用所製作狀態下的工具。又，對於另外1個模，同樣除去 放電加工面的熔融殘留層之後，作爲表面處理，藉由 PCVD法形成厚度5 " m之T i A 1 N披膜。 又，對於另外1個模，不用除去放電加工之熔融殘留 層，作爲完成放電加工的狀態。 進而，對於另外1個模，不用除去放電加工之熔融殘 留層，與前述同樣實施表面處理。 使用以上4種模，當擠製鋁鋼環坯時調查擠製模1的耐 久性。具體而言，至少破壞心軸2—部分之前，或對於實 施表面處理，調查剝離加工面之表面處理披膜之前的濟製 -17- 0334 200401680 (13) 量。將其結果顯示於第9圖。 第9圖記載未進行熔融殘留層之除去處理的模「放電 加工」，及記載進行熔融殘留層之除去處理「硏削加工」 。又各圖形上方之數字顯示到心軸的破壞或表面處理披膜 之剝離前的擠製量。 從第9圖可理解，未進行熔融殘留層之除去處理，表 面處理的模，對於擠製量有1 · 1噸，僅進行熔融殘留層之 除去處理而未進行表面處理的模，擠製量有2 · 2噸，可知 模壽命大致成爲2倍。又，僅進行表面處理之模，對於擠 製量有0· 7噸，在熔融殘留層之除去處理後進行表面處理 的模，擠製量有1 · 2噸，可知表面處理披膜之耐久性特別 地提高。 (實施例2 ) 使用與實施例1同樣形式的模，在放電加工後藉由第 1 0圖所示的各種方法，當除去加工面之熔融殘留層時，將 柱狀體22之軸承25的高度設定爲0 · 7mm，將柱狀體22之 寬度W2設定爲0 · 4mm的狀態下，分別使鄰接柱狀體22 間之溝部1 2寬度G變化進行前述除去處理。而且，在溝 部12之內面26當形成存留放電加工面的狀態時（未充分除 去熔融殘留層時），在柱狀體22之角部產生R0 · 05以上 的塌角時，或在除去處理中在心軸2 (柱狀體2 2 )產生破 損時將發生任何狀態時的溝部1 2之寬度G，當作其除去處 理的界限，並求出其値。將其結果顯示於第1 〇圖。 200401680 (14) 第1 0圖中，各圖形上方之數値是顯示前述界限時的溝 部12之寬度G。又，第10圖中記有「WEDG +硏削」， 是顯示有關本發明之實施，使用藉由金屬線放電硏削法所 製作的工具以硏削加工（使用磁粒）來除去處理。同樣記 有「WEDG +超音波」，是顯示有關本發明之實施， 使用藉由金屬線放電硏削法所製作的工具以超音波加工（ 使用砥粒）來除去處理。作爲工具70，皆使用與實施例1 同樣的工具。 從第1 〇圖可知，本發明實施品，熔融殘留層之除去處 理的界限，對於溝部12之寬度G有0 · 5mm或0 · 〇3mm， 則砂紙硏磨的情況下爲〇 · 3 mm，氣體硏磨的情況下爲〇 · 3 5 mm，微粒子噴砂的情況爲0 · 3 mm，藉由硏肖！J盤硏削力口 工的情況下爲〇 · 3 mm，滾筒加工的情況下爲〇 · 3 mm，超 音波加工的情況下爲0 · 4mm。 是以，若依據本發明之實施，則比先前技術可延長擠 製模的壽命，並且可確認可除去處理更微細形狀之熔融殘 留層。又，從實施例2之結果，可知溝部12之寬度在〇 · 3 mm以下的微細形狀時特別有效。 若依據有關本發明模具構件之加工方法及有關本發明 模具構件之製造方法，則可提供將產生於放電加工面之熔 融殘留層，由於可均勻又高精密度地除去，所以可延長模 具構件的壽命，並且在模具構件實施表面處理的情況下’ 亦可防止表面處理披膜的惡化，經由長期可發揮高功能的 擠製模等之模具構件。 -19- 200401680 (15) 若依據有關本發明擠製模，則使用加工精密度高以高 硬度的微小工具，由於可除去產生於放電加工部的熔融殘 留層，所以均勻又高精密度地除去該熔融殘留層可實現長 壽命且高功能的擠製模。 若依據有關本發明擠製材之製造方法，則使用均勻又 高精密度地除去放電加工部的熔融殘留層之擠製模進行擠 製，所以可獲得尺寸精密度亦高表面性狀亦優異的擠製材 〇 若依據有關本發明擠製材，則藉由均勻又高精密度地 除去放電加工部的熔融殘留層之擠製模所擠製，所以可獲 得尺寸精密度亦高表面性狀亦優異的高品質之擠製材。 【產業上利用可能性】 如以上，有關本發明之具有微細形狀之模具構件之加 工方法，模具構件之製造方法，擠製模，擠製材之製造方 法及擠製材，是將具有微細之放電加工形狀的模具構件之 前述微細形狀部分的熔融殘留層（加工變質層），可均勻 地精密度良好加以除去，可達成長壽命化，高功能化。因 此，可利用於各種模具構件，擠製模，擠製材及此等製造 等。 於此所使用的用語及說明，是爲了用來說明有關本發 明實施形態之一所使用的，本發明並不限定於此。本發明 右在申g靑專利圍內’則不脫離其精神爲限可容許任何設 計上的變更。 -20- 200401680 (16) 【圖式簡單說明】 第1圖A是顯不有關本發明一實施形態之濟製模的心 軸，斜視圖。 第1圖B是柱狀體的平面圖。 第2圖是將同樣擠製模之陰型模從擠製方向後方（入 側）視的前視圖。 第3圖是組合陰型模及心軸之擠製模的要部剖面圖。 第4圖是第3圖之IV - IV線剖面圖。 第5圖是兼用工具的製作，熔融殘留層之除去裝置的 斜視圖。 第6圖是顯示第5圖加工裝置之工具製作時的加工狀態 斜視圖。 第7圖是使用工具進行熔融殘留層之除去狀態的斜視 圖。 第8圖是藉由第1圖至第4圖所製造擠製鋁管的剖面斜 視圖。 第9圖是顯示以實施例進行之擠製模的壽命試驗結果 圖形圖。 第1 〇圖是顯示用來調查以實施例進行熔融殘留層之各 種除去處理的界限試驗結果之斜視圖。 【圖號說明】 1…擠製模， 2…心軸， -21 - 200401680 (17) 3…陰型模， 1 1…間隙’ 12…溝部， 2 1…心軸本體， 22…柱狀體， 23···連設咅β， 25、3 3…軸承咅Β， 2 6…內面， 3 1…開口部， 32···擠製材通過孔， 5 1…下側載物台， 52···上側載物台， 53…加工槽， 5 4…金屬線放電硏削單元， 55…工具安裝工具， 6 0…工具材料， 70…工具， 2 0 0…扁平多孔管， 2 0 1…間隔壁， 2 02…微細中空部， 5 4 1…金屬線導板， 5 42··.金屬線， 5 4 3…放電部， G、W、W2…寬度。 -22-The addition and removal of X by the cutting of the molten residual layer of the tool 70 as described above may be performed with or without magnetic particles. Also, non-Yi Yan: Xiao [J -15- 200401680 (11) can also be removed by ultrasonic processing. This ultrasonic processing is a method of removing the molten residual layer by applying ultrasonic vibration to the tool 70 in a state where particles are provided between the processing surface 26 of the workpiece and the tool 70. • Furthermore, it is not necessary to implement the entire EDM surface except for the processing. The stress at the time of concentrated extrusion can be applied only to the parts that are easily damaged. Furthermore, before removing the molten residual layer, as a pretreatment, micro-discharge machining may be performed on the processing surface of the workpiece. Micro-EDM can reduce the thickness of the molten residual layer generated on the processed surface because of its small processing energy. Furthermore, electrolytic treatment (processing including ion-exchanged water) or surface oxidation treatment is performed to make the molten residual layer brittle, and the removal of the molten residual layer can be easily performed by the aforementioned tool 70. The above embodiment shows the case where the molten residual layer on the inner surface 26 of the groove portion 12 of the mandrel 2 is removed, but the inner peripheral surface of the opening portion 31 of the female mold 3 is the bearing portion 33, or other mandrel 2 or The electrical discharge machined surface of the female mold 3 may be obtained by appropriately removing the molten residual layer. The extrusion die 1 from which the molten residual layer of the discharge-processed surface is removed can also be used directly, or for the purpose of improving the surface properties of the extruded material, or the surface of the processed surface from which the molten residual layer is removed can be treated. Since the molten residual layer is removed with high precision and uniformity, the adhesion of the surface-treated coating film is increased, and the durability of the surface-treated coating film can be improved. In the above embodiment, the case where the die member is an extrusion die is shown. However, the present invention is naturally applicable to other die members. [Example] -16-200401680 (12) (Example 1) In order to show the effect of this embodiment, the following tests were performed. That is, as shown in FIG. 8, the hollow section 202 with a rectangular cross section is arranged in the width The aluminum pipe 200 in the direction is used as the extrusion die 1 and four die steels having a mandrel 2 having a columnar body 22 having a rectangular cross section are prepared. Here, the height of the bearing portion 25 of the columnar body 22 is set to 0 · 7 mm, the width W (Fig. 1 b) is set to 0.4 mm, and the width G of the groove portion 12 adjacent to the columnar body 22 is set. The length of the opening portion 31 of the female mold 3 is set to 0,1 mm to 16 mm, and the height (width) of the opening portion 31 is set to 1 mm. The die processing is performed by electric discharge machining. In addition, for one mold, a molten residual layer including the discharge-machined surface of the inner surface 26 of the groove portion 12 was used with a circular cross-sectional tool made of sintered diamond (diameter 0 · 〇) produced by a wire electric discharge machining method. 8mm). The tool 70 is mounted on the tool mounting tool 5 5 and the tool in the prepared state is used. For the other mold, after removing the residual molten layer on the EDM surface, the T i A 1 N film with a thickness of 5 " m was formed by a PCVD method as a surface treatment. For the other mold, it is not necessary to remove the molten residual layer of the electric discharge machining, and the electric discharge machining is completed. Furthermore, the other mold was subjected to surface treatment in the same manner as described above without removing the molten residual layer of electric discharge machining. Using the above four types of dies, the durability of extrusion die 1 was investigated when extruding aluminum steel ring billets. Specifically, investigate at least the amount of -17- 0334 200401680 (13) before peeling the surface-treated coating of the machined surface before destroying at least part of the mandrel, or for surface treatment. The results are shown in Fig. 9. Fig. 9 illustrates a mold "discharge processing" in which a molten residual layer removal process is not performed, and a mold "cutting process" in which a molten residual layer removal process is performed. The figures above the figures show the amount of extrusion until the mandrel is broken or the surface-treated film is peeled off. It can be understood from FIG. 9 that the die without surface removal treatment and surface treatment has an extrusion amount of 1.1 tons, and the die with only surface removal treatment and no surface treatment has an extrusion amount. With a weight of 2.2 tons, it can be seen that the mold life is roughly doubled. In addition, for a die that is only surface-treated, the extrusion amount is 0.7 tons, and a die that is subjected to surface treatment after the removal of the molten residual layer is subjected to an extrusion amount of 1.2 tons, which shows the durability of the surface-treated coating. Especially improved. (Embodiment 2) Using a mold of the same form as in Embodiment 1, after the electric discharge machining by various methods shown in FIG. 10, when the molten residual layer on the machined surface was removed, the bearing 25 of the columnar body 22 was removed. In the state where the height is set to 0 · 7 mm and the width W2 of the columnar bodies 22 is set to 0 · 4 mm, the width G of the groove portions 12 adjacent to the adjacent columnar bodies 22 is changed to perform the aforementioned removal processing. In addition, when the inner surface 26 of the groove portion 12 is in a state where the electric discharge machined surface is left (when the molten residual layer is not sufficiently removed), when a corner of the columnar body 22 has a sag of R0 · 05 or more, or during removal In the case where the mandrel 2 (the columnar body 2 2) is broken, the width G of the groove portion 12 in any state will be regarded as the limit of the removal process, and the 値 will be determined. The results are shown in Fig. 10. 200401680 (14) In Fig. 10, the number 上方 above each figure is the width G of the groove portion 12 when the aforementioned limit is displayed. In addition, "WEDG + cutting" is shown in Fig. 10, which shows the implementation of the present invention, and is removed by a cutting process (using magnetic particles) using a tool made by a wire discharge cutting method. Similarly, "WEDG + ultrasonic" is shown to show the implementation of the present invention. The tool is made by a wire electric discharge cutting method and is removed by ultrasonic processing (using a pellet). As the tool 70, the same tools as those of the first embodiment were used. It can be seen from FIG. 10 that the limit of the removal treatment of the molten residual layer of the product of the present invention is 0.5 mm or 0 mm for the width G of the groove portion 12, which is 0.3 mm in the case of sandpaper honing. In the case of gas honing, it is 0.35 mm, and in the case of fine sandblasting, it is 0.3 mm. J disk cutting force is 0.3 mm in the case of cutting, 0.3 mm in the case of roller processing, and 0.4 mm in the case of ultrasonic processing. Therefore, if implemented according to the present invention, the life of the extrusion die can be prolonged compared with the prior art, and it can be confirmed that the molten residual layer having a finer shape can be removed and treated. Further, from the results of Example 2, it can be seen that it is particularly effective when the width of the groove portion 12 is a fine shape of 0.3 mm or less. According to the processing method of the mold member according to the present invention and the manufacturing method of the mold member according to the present invention, a molten residual layer that will be generated on the EDM surface can be provided, and can be removed uniformly and with high precision, so the mold member can be extended When the mold member is subjected to surface treatment, it can also prevent the deterioration of the surface treatment film, and can be used for mold members such as extrusion molds that can exhibit high functions for a long time. -19- 200401680 (15) According to the extrusion die according to the present invention, a small tool with high processing precision and high hardness can be used to remove the molten residual layer generated in the EDM section, so it can be removed uniformly and with high precision. This molten residual layer can realize a long-life and highly functional extrusion die. According to the method for manufacturing an extruded material according to the present invention, extrusion is performed using an extrusion die that uniformly and with high precision removes the molten residual layer of the electric discharge machining portion, so that an extruded material having high dimensional accuracy and excellent surface properties can be obtained. 〇 According to the extruded material according to the present invention, it is extruded by an extrusion die that removes the molten residual layer of the electric discharge machining section uniformly and with high precision, so that high-quality products with high dimensional accuracy and excellent surface properties can be obtained. Extrusion material. [Industrial Applicability] As mentioned above, the method for processing the mold member with a fine shape, the method for manufacturing the mold member, the extrusion mold, the method for manufacturing the extrusion material, and the extrusion material according to the present invention are micro-discharge machining. The molten residual layer (processing deterioration layer) of the aforementioned finely shaped part of the mold member of the shape can be uniformly removed with good precision, and it can achieve long life and high functionality. Therefore, it can be used for various mold members, extrusion dies, extrusion materials, and the like. The terms and descriptions used herein are used to explain one of the embodiments of the present invention, and the present invention is not limited thereto. The present invention is within the scope of the patent application, and any design change can be tolerated without departing from its spirit. -20- 200401680 (16) [Brief description of the drawings] FIG. 1 is a perspective view showing a mandrel showing a mold according to an embodiment of the present invention. FIG. 1B is a plan view of a columnar body. Fig. 2 is a front view of a female die of the same extrusion die as viewed from the rear (inside) of the extrusion direction. Fig. 3 is a cross-sectional view of a main part of an extrusion die combining a female die and a mandrel. Fig. 4 is a sectional view taken along line IV-IV in Fig. 3. Fig. 5 is a perspective view of a device for producing a combined tool and a device for removing a molten residual layer. Fig. 6 is a perspective view showing a machining state when a tool of the machining apparatus of Fig. 5 is produced. Fig. 7 is a perspective view showing a state where the molten residual layer is removed using a tool. Fig. 8 is a cross-sectional perspective view of an extruded aluminum pipe manufactured from Figs. 1 to 4; Fig. 9 is a graph showing the results of a life test of an extrusion die according to an example. Fig. 10 is a perspective view showing the results of a limit test for investigating various removal treatments of the molten residual layer in Examples. [Illustration of drawing number] 1 ... extrusion die, 2 ... mandrel, -21-200401680 (17) 3 ... female die, 1 1 ... clearance '12 ... groove, 2 1 ... mandrel body, 22 ... column ， 23 ·· Sequentially set ， β, 25, 3 3… bearing 咅 Β, 2 6… inner surface, 3 1… openings, 32… · extruded material passage holes, 5 1… lower stage, 52 ··· Upper stage, 53 ... machining groove, 5 4 ... wire discharge discharge unit, 55 ... tool mounting tool, 6 0 ... tool material, 70 ... tool, 2 0 ... flat flat tube, 2 0 1 ... partition wall, 2 02 ... fine hollow part, 5 4 1 ... metal wire guide, 5 42 ... metal wire, 5 4 3 ... discharge part, G, W, W2 ... width. -twenty two-