562909 A7 B7 五、發明説明（1 ) 發明領域 (請先閱讀背面之注意事項再填寫本頁) 本發明係關於一種程序’用以控制冷鍛金屬材質所使 用的單製程型式的水潤滑劑，且其目的是要提供一種進步 的潤滑劑，可用於金屬材質的表面上而不需施加任何預先 的化學處理。該潤滑劑適合用於製造運輸機器的重要零件 背景技術 一般來說，在例如不鏽鋼等金屬材質之冷鍛中，其中 會在金屬材質表面上實施潤滑塗敷以防止由於在冷鍛處理 中所使用之模子與工具直接接觸金屬材質所造成之表面缺 陷。 有兩種型式的塗敷層可以形成在金屬材質上面。一種 是直接黏著於金屬材質表面上的潤滑劑，而另一種是預先4 形成在金屬材質上面的化學層。 直接黏著於金屬材質表面上的潤滑塗敷層比起預先形 成在金屬材質表面上的化學層之潤滑塗敷層來說具有較差 經濟部智慧財產局員工消費合作社印製 的黏附性，且因此前者一般係用於具有較少變形量的冷鍛 〇 在後者的情形中，首先會經由例如磷酸鹽層形成處理 或草酸鹽層形成處理而在金屬材質的表面上形成一化學層 ，一般所形成的化學層適合作潤滑劑的載體，且接著會使 用具有高潤滑性的潤滑劑來形成這樣的化學層。在此型式 中，所形成的膜具有雙層結構，其中包含作爲載體的一化 -4- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 562909 A7 B7 五、發明説明（2 ) 學層與一潤滑層，這種膜具有高度抗表面缺陷之特性。因 此，這種型式的潤滑劑已經被廣泛運用在電線抽拉、管抽 ，— (請先閱讀背面之注意事項再填寫本頁) 拉及冷鍛上。特別是，其中在需要嚴格變形之冷鍛中，會 使用這種處理法，就是首先形成含有磷酸鹽或草sk鹽之化 學層，然後塗敷潤滑劑到此化學層上。 塗敷到此化學層上之潤滑劑就用途來說可以區分成兩 種群組。第一組包括可以黏著於化學層上之潤滑劑，而第 二組是能與此化學層反應之潤滑劑。 第一組的潤滑劑包括藉由兩種潤滑劑，一是使用礦物 油、蔬菜油或合成油作爲基油且在基油中含有高壓添加物 所備製之潤滑劑，另一種是藉由將固態潤滑劑，例如石墨 與二硫化鉬，連同接合劑成分溶解入水中而備製之潤滑劑 。這些潤滑劑可以具有容易控制濃度之優點，因爲它們僅 藉由噴塗塗敷與浸泡塗敷即可使用，然而，由於它們只有 很小的潤滑性，所以它們傾向使用於需要較小的金屬材質 變形量之情形。 經濟部智慧財產局員工消費合作社印製 另一方面，在第二組的潤滑劑中，例如鈉脂肪等反應 性肥皂係用於其中需要高潤滑性之冷鍛。反應性肥皂會與 化學層反應且產生具有高潤滑性之一層。 然而，由於反應性肥皂提供化學反應，所以在處理期 間，對於溶液組成的控制、化學反應的溫度控制及溶液退 化的更新控制等因素均非常重要。 近年來，爲了保護全球的環境，所以減少工業廢棄物 是一大課題，且有鑑於環保，含有磷酸鹽化合物的工業廢 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 562909 A7 B7__ 五、發明説明（3 ) 棄物被認爲是相當嚴重的問題。因此，必須使用不會產生 廢棄物的製程才行。 (請先閲讀背面之注意事項再填寫本頁) 而且，在會產生磷酸鹽層且在此磷酸鹽層上使用反應 性肥皂的習知製程中，其製程需要簡化與改進，由於它需 要較大的處理工廠面積、較多的時間及複雜的製程控制。 例如，在產生磷酸鹽層的處理中，必須藉由滴定法來計算 出在自由酸度上之磷酸鹽濃度、總酸度及加速劑之濃度。 而且，在反應性肥皂應用處理中，一般藉由人工實施自由 酸度及其組成物之濃度分析。 爲了解決上述問題，可以引述另一個習知技術，日本 專利案No .1 0 - 8085A， >金屬材質冷加工之水 性潤滑劑〃。此習知技術係關於一種用於金屬材質冷鍛之 水性潤滑劑，其中（A )水溶性無機鹽、（B )固體潤滑 劑、（C )至少一種從化學油、動物油、蔬菜油及合成油. 中所選出之油，（D )表面活性劑及（E )水係均勻地擴 散與乳化。 經濟部智慧財產局員工消費合作社印製 此習知技術係關於一種水性非反應性潤滑劑，且致力 於將形成磷酸鹽層、水沖洗及塗敷反應性肥皂等三道習知 處理予以簡化。亦即，在此製程中，藉由浸泡等方式與單 製程型式的水潤滑劑接觸金屬材質而直接在金屬材質的表 面上形成潤滑劑膜，而不需要在金屬材質的表面上預先形 成任何化學層。這種型式的潤滑劑一般稱爲單製程型式的 潤滑劑。 根據本發明之發明者的認知，當使用這種型式的水性 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） _ 6 - 562909 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（4) 非反應性潤滑劑時，其中內含物質的濃度是相當重要的。 因爲在非反應性潤滑劑之情形中，潤滑塗敷層之重量，亦 即塗敷量，係根據溶液中所含物質之濃度而決定。由於塗 敷層的重量嚴重地影響潤滑性與抗表面缺陷的性能，所以 它是很重要的因素。可藉由以下的式子來計算塗敷層的重 量，所形成的塗敷層之重量可以根據在形成塗敷層前後金 屬材質的塗敷區域之間的重量差而計算出來。 潤滑劑塗敷層重量=(形成塗敷層之後的重量一形成 塗敷層之前的重量）/(金屬材質的面積）。 因此，在溶液中含有的物質之精確濃度控制對於要獲 得固定重量的塗敷層來說是相當重要的。然而，這必須要 花費更多的人力才能決定濃度，所以在工業上使用這種非 反應性的潤滑劑是相當不方便的。 發明槪述 因此本發明的目的是要解決上述習知技術所產生之問 題，且要提供一種用於冷鍛的單製程的水潤滑劑之控制處 理法，其中簡化所有的操作且更適合全球環保。 本發明的發明人已經硏究要解決上述問題且已經發現 出一種含有至少一水溶性無機鹽的水潤滑劑，其中藉由控 制水潤滑劑之導電性就可以控制水潤滑劑中所內含物質之 濃度。 亦即，本發明係關於一種程序，用以控制含有至少一 水溶性無機鹽的用於冷鍛的單製程型式之水潤滑劑，其特 裝 訂 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇x297公釐） 562909 A7 B7 五、發明説明（5 ) (請先閲讀背面之注意事項再填寫本頁) 徵在於此程序包含一步驟，係藉由在將水潤滑劑塗敷到金 屬材質表面上時，測量出水潤滑劑之導電性而予以控制水 潤滑劑之濃度，以及一步驟，係將組成物供應到水潤滑劑 中以將水潤滑劑之濃度保持在一預定程度。 本發明亦關於一種程序，用以控制上述用於冷鍛的單 製程型式之水潤滑劑，其中此一水溶性無機鹽是選自硫酸 鹽、矽酸鹽、硼酸鹽、鉬酸鹽及鎢酸鹽所構成的群組之一 、，、 。且該種水潤滑劑的主要用途係用以製造機車、汽車及其 他運輸機器，例如引擎、動力火車及底盤。 圖式簡單說明 圖1顯示用以實施本發明控制程序之設備的一實施例 ， 圖2顯示水潤滑劑之濃度與導電性之間的關係； 圖3顯示在水潤滑劑的導電性與形成在金屬材質表面 上的塗敷層重量之間的關係。 經濟部智慧財產局員工消費合作社印製 元件對照表 1:水潤滑劑槽 2:水潤滑劑 3:液面感測器 4:液面控制器 5 :電磁閥 6:水供應槽 -8- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 562909 A 7 B7 五、發明説明（6 ) 7 :導電性感測器 8 :導電性控制器 (請先閱讀背面之注意事項再填寫本頁) 9 :電磁閥 1 0 :濃縮水潤滑劑槽 較佳實施例之詳細說明 現在，將詳細說明本發明。在本發明用於冷鍛的單製 程型式的水潤滑劑之控制程序中，可以使用含有至少一水 溶性無機鹽之水潤滑劑。且本發明可以使用由內含的水溶 性無機鹽所產生之水潤滑劑的導電性。 經濟部智慧財產局員工消費合作社印製 如上所述，當以用於冷鍛的單製程型式的水潤滑劑來 塗敷金屬材質表面時，形成在金屬材質上的潤滑塗敷層之 重量是很重要的。在此情形中，形成在金屬材質上的潤滑 塗敷層之重量是與水潤滑劑的濃度有很密切的關係。且水 潤滑劑的濃度又與水潤滑劑之導電性有很密切的關係。因 此，控制導電性就能導致出控制水潤滑劑的濃度，而且， 還可以產生控制形成在金屬材質表面上之潤滑塗敷層的重 量。亦即，藉由降低導電性，也就是藉由水來稀釋就能控 制潤滑塗敷層的重量，反之藉由添加濃縮的水潤滑劑溶液 就能增加導電性，因而增加了塗敷層的重量。因此，可以 藉由控制水潤滑劑的導電性而無須測量水潤滑劑的濃度就 可以控制潤滑塗敷層的重量。 在工業操作上，必須將重要的操作項目保持在一目標 値上。且在冷鍛操作中，必須控制許多項目，諸如製造適 -9 - 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） 562909 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（7 ) 合的冷鍛工具、適當的冷鍛速度以及在金屬材質上的潤滑 塗敷層之適當重量。可以藉由控制水潤滑劑之濃度而獲得 適當的潤滑塗敷層重量。然而’藉由習知程序來控制水潤 滑劑的濃度會是一個相當麻煩的操作’由於它需要經常測 量水潤滑劑的濃度。然而，在本發明中，可以藉由測量導 電性之簡單操作而輕易且正確地獲得水潤滑劑之濃度。 可以藉由在水潤滑劑中添加濃縮的水潤滑劑來控制水 潤滑劑的濃度位於目標値內而連續獲得想要的潤滑劑塗敷 重量。 . 較佳的水溶性無機鹽包括硫酸鹽、矽酸鹽、硼酸鹽、 鉬酸鹽及鎢酸鹽所構成的群組之一，但並非侷限於此。 實施例 以下，將提供本發明之實施例。 <水潤滑劑> 在本發明中所使用之水潤滑劑係包含硼酸鹽作爲水溶 性無機鹽（商標爲 Fine Ryube E750HF，由 Nihon Parkerizing 股份有限公司所製造），以純水稀釋以便分別調製5 0 % 、60%及70%的水潤滑劑，且各種濃度的水潤滑劑均 備製5 0升。 <測量> 藉由一般的導電性測量計來測量水潤滑劑之導電性。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -1〇 - ·♦· (請先閱讀背面之注意事項再填寫本頁) 562909 A7 B7 五、發明説明（8) (請先閲讀背面之注意事項再填寫本頁) 一淸潔過的鋼樣材（圓柱狀、直徑5 0 m m、長度1 5 0 m m )係以水潤滑劑處理而在鋼樣材表面上形成一潤滑塗 敷層，且藉由塗敷後的鋼材重量減去塗敷前的鋼材重量就 可以決定出潤滑塗敷層（塗敷量）的重量。 <連續處理測試> 先準備如圖1所示之設備。水潤滑劑（2 )所用的水 潤滑劑槽（1 )之體積爲5 0升，且水潤滑劑（2 )的溫 度係設定於6 0 ° C。一液面感測器（3 )係設定在水潤滑 劑的液面水平上，當水潤滑劑的液面水平自起初的液面水 平下降1 c m時，液面控制器（4 )會產生作用而自動開 啓電磁閥，藉此從水供應槽（6 )中會有純水流入水潤滑 劑（2 )。當液面水平達到起初水平時，該電磁閥就會關 閉。通常在操作時，水潤滑劑的液面水平會下降，因爲加 熱到6 0 ° C會黏著於鋼材上且被蒸發而有所消耗。 經濟部智慧財產局員工消費合作社印製 反之，在導電性控制器（8 )上顯示由導電性感測器 (7 )所測量之水潤滑劑的導電性。當導電性自起初値下 降至2 %的程度時，則電磁閥會打開，而從濃縮水潤滑劑 槽（1 0 )中流出濃縮的水潤滑劑（Fine Ryube E750HF (1 00%))以補充水潤滑劑的組成物，且當導電性回覆到起 初値時，則會自動關閉電磁閥（9 )以停止補充濃縮水潤 滑劑。在上述的條件下，以個別濃度的水潤滑劑來連續處 理6 0 0 0片鋼樣材。每個鋼樣材的潤滑塗敷層之重量（ 塗敷量）係以萃取方式檢查，且具有潤滑塗敷層的鋼樣材 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇X；297公釐） -11 - 562909 A7 B7 五、發明説明（9) 受到冷鍛以計算其潤滑性能。 圖2顯示水潤滑劑的濃度與導電性之間的關係，圖3 顯示導電性與潤滑塗敷層的重量。因此，可了解的是當導 電性藉由稀釋水潤滑劑而減少時，塗敷層的重量也會伴隨 減少。因此，可以藉由控制水潤滑劑的導電性而控制塗敷 層的重量控制。 連續處理測試的結果係顯示於表1中。其中顯示出潤 滑塗敷層的重量可以藉由控制水潤滑劑的導電性而將潤滑 塗敷層的重量控制在一固定的水平上，且不會引起任何問 題就能產生良好的冷鍛。 (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 表1 在連續處 理中的樣 材處理順 序 50% 60% 70% 導電性27mS/cm 導電性30mS/cm 導電性3 3 m S / c m 潤滑塗敷 層 mg/m2 冷锻 性能 潤滑塗敷 M mg/m2 冷锻 性能 潤滑塗敷 層 m g / m2 冷鍛 性能 第一個 8.8 良好 9.8 良好 10.5 良好 第1000個 8.9 良好 9.7 良好 10.6 良好 第2000個 8.7 良好 9.7 良好 10.6 良好 第3000個 8.8 良好 9.8 良好 10.6 良好 第4000個 8.8 良好 9.7 良好 10.5 良好 第5000個 8.7 良好 9.7 良好 10.6 良好 第6000個 8.8 良好 9.8 良好. 10.6 良好 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ 12 - 562909 A7 B7 五、發明説明（10) 本發明的優點 程中水 製其到 單，物 用果成。 使效組量 由的充重 藉良補的 明優及層 發多以敷 本許性m ，生電劑 解產導W 了中的 π 楚a劑” 淸處滑ώί 以鍛潤ii 可冷水m 中在制ffi、 明而控單 說滑中簡 述潤作而 上水操中 從的在劑 式由滑 型藉潤 (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -13 -562909 A7 B7 V. Description of the invention (1) Field of invention (please read the notes on the back before filling out this page) The present invention is about a program 'for controlling single-process water lubricants used in cold forging metal materials, And its purpose is to provide an improved lubricant that can be used on metal surfaces without any prior chemical treatment. BACKGROUND OF THE INVENTION Generally speaking, in the cold forging of metal materials such as stainless steel, in general, the surface of the metal material is lubricated to prevent the lubricant from being used in the cold forging process. Surface defects caused by direct contact between the mold and the tool. There are two types of coatings that can be formed on metal materials. One is a lubricant that directly adheres to the surface of a metal material, and the other is a chemical layer formed on the metal material in advance. The lubricating coating layer directly adhered to the surface of the metal material has lower adhesion than the lubricating coating layer of the chemical layer formed on the surface of the metal material in advance. Generally used for cold forging with a small amount of deformation. In the latter case, a chemical layer is first formed on the surface of a metal material through, for example, a phosphate layer forming process or an oxalate layer forming process. The chemical layer is suitable as a carrier for the lubricant, and then a lubricant with high lubricity is used to form such a chemical layer. In this type, the formed film has a double-layer structure, which includes Yihua as a carrier. -4- The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 562909 A7 B7. 5. Description of the invention (2 ) A chemical layer and a lubricating layer. This film has a high resistance to surface defects. Therefore, this type of lubricant has been widely used in wire drawing and pipe drawing— (Please read the precautions on the back before filling this page) Drawing and cold forging. In particular, in cold forging that requires strict deformation, this treatment method is used, which first forms a chemical layer containing a phosphate or grass salt, and then applies a lubricant to this chemical layer. The lubricants applied to this chemical layer can be divided into two groups in terms of use. The first group includes lubricants that can adhere to the chemical layer, and the second group is lubricants that can react with this chemical layer. The first group of lubricants includes two types of lubricants, one is a mineral oil, vegetable oil, or synthetic oil as a base oil and contains high-pressure additives in the base oil prepared by the lubricant Solid lubricants, such as graphite and molybdenum disulfide, are prepared by dissolving the binder components in water. These lubricants can have the advantage of being easy to control the concentration, because they can be used only by spray coating and dip coating. However, because they have very little lubricity, they tend to be used for materials that require less deformation. Quantity situation. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs On the other hand, in the second group of lubricants, reactive soaps such as sodium fat are used for cold forging where high lubricity is required. Reactive soap reacts with the chemical layer and produces a layer with high lubricity. However, since the reactive soap provides a chemical reaction, factors such as the control of the solution composition, the temperature control of the chemical reaction, and the regeneration control of the solution degradation are very important during the treatment. In recent years, in order to protect the global environment, reducing industrial waste is a major issue, and in view of environmental protection, the industrial waste paper containing phosphate compounds is sized according to the Chinese National Standard (CNS) A4 (210X297 mm) 562909 A7 B7__ 5. Description of the invention (3) Waste is considered to be a serious problem. Therefore, a process that does not generate waste must be used. (Please read the precautions on the back before filling this page.) Moreover, in the conventional process that generates a phosphate layer and uses a reactive soap on this phosphate layer, the process needs to be simplified and improved because it requires a larger Processing plant area, more time and complex process control. For example, in the process of generating a phosphate layer, the concentration of phosphate in total acidity, the total acidity, and the concentration of the accelerator must be calculated by titration. In addition, in the application of reactive soap, the analysis of free acidity and the concentration of its constituents is generally performed manually. In order to solve the above problems, another conventional technique can be cited, Japanese Patent No. 10-8085A, > Water-based lubricant for cold working of metallic materials. This conventional technology relates to an aqueous lubricant for cold forging of metal materials, wherein (A) a water-soluble inorganic salt, (B) a solid lubricant, and (C) at least one selected from chemical oil, animal oil, vegetable oil, and synthetic oil. The selected oil, (D) surfactant and (E) water system evenly diffuse and emulsify. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This conventional technology is about a water-based non-reactive lubricant, and is committed to simplifying the three conventional processes of forming a phosphate layer, rinsing with water, and applying reactive soap. That is, in this process, the lubricant film is directly formed on the surface of the metal material by contacting the metal material with a single process type of water lubricant by immersion or the like, without the need to form any chemical on the surface of the metal material in advance. Floor. This type of lubricant is commonly referred to as a single-process lubricant. According to the knowledge of the inventor of the present invention, when using this type of water-based paper, the Chinese National Standard (CNS) A4 specification (210 X 297 mm) is applicable. Preparation of the invention 5. Description of the invention (4) In the case of non-reactive lubricants, the concentration of substances contained therein is very important. This is because in the case of non-reactive lubricants, the weight of the lubricating coating layer, that is, the coating amount, is determined according to the concentration of the substance contained in the solution. Since the weight of the coating layer seriously affects the lubricity and resistance to surface defects, it is an important factor. The weight of the coating layer can be calculated by the following formula, and the weight of the coating layer formed can be calculated based on the weight difference between the coating areas of the metal material before and after the coating layer is formed. Lubricant coating weight = (weight after coating is formed-weight before coating is formed) / (area of metal material). Therefore, the precise concentration control of the substances contained in the solution is very important for obtaining a fixed weight coating layer. However, it takes more labor to determine the concentration, so it is quite inconvenient to use this non-reactive lubricant in industry. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the problems caused by the above-mentioned conventional technology, and to provide a single-process water lubricant control method for cold forging, which simplifies all operations and is more suitable for global environmental protection. . The inventors of the present invention have researched to solve the above problems and have discovered a water lubricant containing at least one water-soluble inorganic salt, in which the substances contained in the water lubricant can be controlled by controlling the conductivity of the water lubricant Of the concentration. That is, the present invention relates to a program for controlling a single-process type water lubricant for cold forging containing at least one water-soluble inorganic salt, and its special binding (please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) 562909 A7 B7 V. Description of the invention (5) (Please read the precautions on the back before filling this page) This procedure includes a step, The concentration of the water lubricant is controlled by measuring the conductivity of the water lubricant when the water lubricant is applied to the surface of a metal material, and a step of supplying the composition to the water lubricant to water the water The concentration of the lubricant is maintained at a predetermined level. The invention also relates to a program for controlling the above-mentioned single-process type water lubricant for cold forging, wherein the water-soluble inorganic salt is selected from the group consisting of sulfate, silicate, borate, molybdate, and tungstic acid. One of the groups formed by salt And the main purpose of this water lubricant is to make locomotives, automobiles and other transportation machines, such as engines, power trains and chassis. Brief Description of the Drawings Figure 1 shows an embodiment of a device for implementing the control program of the present invention, Figure 2 shows the relationship between the concentration of water lubricant and conductivity; Figure 3 shows the conductivity and formation of water lubricant in The relationship between the weight of the coating on the surface of the metal material. Printed components comparison table for employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1: Water lubricant tank 2: Water lubricant 3: Liquid level sensor 4: Liquid level controller 5: Solenoid valve 6: Water supply tank-8 Paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 562909 A 7 B7 V. Description of invention (6) 7: Conductive sensor 8: Conductivity controller (please read the precautions on the back before filling in this Page 9: Solenoid valve 10: Detailed description of the preferred embodiment of the concentrated water lubricant tank Now, the present invention will be described in detail. In the control process of the single-process type water lubricant for cold forging according to the present invention, a water lubricant containing at least one water-soluble inorganic salt may be used. Furthermore, the present invention can use the conductivity of a water lubricant produced from a water-soluble inorganic salt contained therein. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. important. In this case, the weight of the lubricating coating layer formed on the metal material is closely related to the concentration of the water lubricant. And the concentration of the water lubricant is closely related to the conductivity of the water lubricant. Therefore, controlling the conductivity can result in controlling the concentration of the water lubricant, and also can control the weight of the lubricating coating layer formed on the surface of the metal material. That is, by reducing the conductivity, that is, by diluting with water, the weight of the lubricating coating layer can be controlled. Conversely, by adding a concentrated aqueous lubricant solution, the conductivity can be increased, thereby increasing the weight of the coating layer. . Therefore, the weight of the lubricating coating layer can be controlled by controlling the conductivity of the water lubricant without measuring the concentration of the water lubricant. In industrial operations, important operating items must be maintained on a target 値. And in the cold forging operation, many items must be controlled, such as manufacturing suitable -9-This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) 562909 Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (7) A suitable cold forging tool, an appropriate cold forging speed, and an appropriate weight of a lubricating coating on a metal material. An appropriate lubricating coating weight can be obtained by controlling the concentration of the water lubricant. However, 'controlling the concentration of a water-lubricant by a conventional procedure can be a rather cumbersome operation' since it requires frequent measurement of the concentration of the water-lubricant. However, in the present invention, the concentration of the water lubricant can be easily and accurately obtained by a simple operation of measuring conductivity. The concentration of the water lubricant can be controlled by adding the concentrated water lubricant to the water lubricant to keep the desired lubricant coating weight continuously. Preferred water-soluble inorganic salts include, but are not limited to, one of the group consisting of sulfate, silicate, borate, molybdate, and tungstate. Examples Hereinafter, examples of the present invention will be provided. < Water lubricant > The water lubricant used in the present invention contains borate as a water-soluble inorganic salt (trade name: Fine Ryube E750HF, manufactured by Nihon Parkerizing Co., Ltd.), and is diluted with pure water for separate preparation 50%, 60% and 70% water lubricants, and various concentrations of water lubricants are prepared for 50 liters. < Measurement > The conductivity of the water lubricant is measured by a general conductivity meter. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -1〇- · ♦ (Please read the precautions on the back before filling this page) 562909 A7 B7 V. Description of the invention (8) (Please first Read the notes on the back and fill in this page again.) A clean steel sample (cylindrical, 50 mm in diameter, 150 mm in length) is treated with water lubricant to form a lubricious coating on the surface of the steel sample. Coating, and the weight of the lubricating coating (coating amount) can be determined by subtracting the weight of the steel before coating from the weight of the steel after coating. < Continuous processing test > The equipment shown in Fig. 1 is prepared first. The volume of the water lubricant tank (1) used for the water lubricant (2) is 50 liters, and the temperature of the water lubricant (2) is set at 60 ° C. A level sensor (3) is set at the level of the water lubricant. When the level of the water lubricant drops 1 cm from the initial level, the level controller (4) will function The solenoid valve is automatically opened, whereby pure water flows from the water supply tank (6) into the water lubricant (2). When the liquid level reaches the initial level, the solenoid valve closes. Normally, the level of the water lubricant will drop during operation, because heating to 60 ° C will stick to the steel and be consumed by evaporation. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. On the contrary, the conductivity of the water lubricant measured by the conductive sensor (7) is displayed on the conductivity controller (8). When the conductivity drops to 2% from the beginning, the solenoid valve will open, and the concentrated water lubricant (Fine Ryube E750HF (100%)) will flow out from the concentrated water lubricant tank (1 0) to supplement The composition of the water lubricant, and when the conductivity returns to the original level, the solenoid valve (9) will be automatically closed to stop the replenishment of the concentrated water lubricant. Under the above conditions, 6 000 pieces of steel samples were continuously processed with water lubricants of individual concentrations. The weight (coating amount) of the lubricating coating layer of each steel sample is checked by extraction, and the steel sample with the lubricating coating layer is in accordance with the Chinese National Standard (CNS) A4 specification (21〇X; 297 mm) -11-562909 A7 B7 V. Description of the invention (9) It was subjected to cold forging to calculate its lubricating performance. Figure 2 shows the relationship between the concentration of water lubricant and conductivity, and Figure 3 shows the conductivity and the weight of the lubricating coating. Therefore, it is understood that when the conductivity is reduced by diluting the water lubricant, the weight of the coating layer is also reduced. Therefore, the weight control of the coating layer can be controlled by controlling the conductivity of the water lubricant. The results of the continuous processing test are shown in Table 1. It is shown that the weight of the lubricating coating layer can be controlled to a fixed level by controlling the conductivity of the water lubricant, and good cold forging can be produced without causing any problems. (Please read the precautions on the back before filling out this page) Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economy Table 1 Sample processing sequence in continuous processing 50% 60% 70% Electrical conductivity 27mS / cm Electrical conductivity 30mS / cm Electrical conductivity 3 3 m S / cm Lubricating coating mg / m2 Cold forging performance Lubricating coating M mg / m2 Cold forging performance Lubricating coating mg / m2 Cold forging performance First 8.8 Good 9.8 Good 10.5 Good 1000th 8.9 Good 9.7 Good 10.6 Good 2000th 8.7 Good 9.7 Good 10.6 Good 3000th 8.8 Good 9.8 Good 10.6 Good 4000th 8.8 Good 9.7 Good 10.5 Good 5000th 8.7 Good 9.7 Good 10.6 Good 6000th 8.8 Good 9.8 Good. 10.6 Good This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) _ 12-562909 A7 B7 V. Description of the invention (10) The advantages of the present invention are that it is made from water to water, and the material is fruitful. The effect of the amount of the good and good supplements is good enough to make up for the cost of the m, the generation of electricity generating agent to guide the production of the π Chu a agent 淸 淸 Shoe for sale 以 forging ii can be cold water In the system, the system is simple, the control is simple, the slip is briefly described, and the water is used. The formula is borrowed by the slip type (please read the precautions on the back before filling this page). The paper size printed by the cooperative applies the Chinese National Standard (CNS) A4 (210X297 mm) -13-