JP2007253219A - Press working method - Google Patents

Press working method Download PDF

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JP2007253219A
JP2007253219A JP2006083629A JP2006083629A JP2007253219A JP 2007253219 A JP2007253219 A JP 2007253219A JP 2006083629 A JP2006083629 A JP 2006083629A JP 2006083629 A JP2006083629 A JP 2006083629A JP 2007253219 A JP2007253219 A JP 2007253219A
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workpiece
lubricant
press working
work
energization
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Makoto Kishimoto
信 岸本
Hiroshi Kageyama
寛 影山
Tatsushi Hayashi
達志 林
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JATCO Ltd
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JATCO Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To propose a press working method by which productivity is improved by shortening drying time and also the cost of equipment and an installation area are reduced. <P>SOLUTION: In this method, when performing press working of a work 10 by using a fixed die 11 and a movable die 12, a lubricant c is applied to the surface of the work 10, next, the work 10 is placed on the fixed die 11 and, after drying the lubricant c applied to the surface of the work 10 by heating the work 10 by resistance heat-generation by conducting electricity; and press working is performed by making the movable die 12 coincide with the fixed die 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ワークに潤滑膜を施してプレス加工するための方法に関するものである。   The present invention relates to a method for press-working a workpiece with a lubricating film.

冷間・温間・熱間で代表されるプレス加工では、ワークを加工のし難い場合、前もってワークの表面に潤滑処理をしておき、ワークとポンチとの間の潤滑効果を高めることが知られている。   It is known that in press work represented by cold, warm, and hot, if it is difficult to process the workpiece, the surface of the workpiece is lubricated in advance to enhance the lubrication effect between the workpiece and the punch. It has been.

こうした潤滑処理には、例えば、ボンデ処理などのようなリン酸亜鉛被膜処理があるが、専用の処理槽などが必要であるため、近年は、特別な槽がなくてもリン酸亜鉛被膜処理と同等の潤滑性能を発揮するプレコート潤滑剤と呼ばれるものが使用されている。これは、液体に可溶または分散可能な潤滑剤であり、ワークの表面にスプレーして乾燥させることにより、ワークの表面に強固な潤滑膜を形成し、プレス加工等の塑性変形に耐え得る潤滑性能を奏する。   Such a lubrication treatment includes, for example, a zinc phosphate coating treatment such as a bonde treatment, but since a dedicated treatment tank is required, in recent years, a zinc phosphate coating treatment can be performed even without a special tank. A so-called precoat lubricant that exhibits equivalent lubricating performance is used. This is a lubricant that is soluble or dispersible in a liquid. By spraying and drying the surface of the workpiece, it forms a strong lubricating film on the surface of the workpiece, and can withstand plastic deformation such as pressing. Play performance.

このため、従来は、プレコート潤滑剤を乾燥させるにあたり、連続温風乾燥炉、連続ヒータ乾燥炉またはバッチ処理炉などの乾燥炉を用いていた。   For this reason, conventionally, a drying furnace such as a continuous hot air drying furnace, a continuous heater drying furnace or a batch processing furnace has been used to dry the precoat lubricant.

しかしながら、上述の乾燥炉はいずれも、乾燥に時間がかかるため、タクトタイムが長いという問題がある。また、乾燥に時間がかかるため、工程時間が比較的短く済むプレス工程とのバランスをとるためには、乾燥炉を長くしたり、乾燥炉またはバッチ処理炉を複数設けることが必要となり、高額な設備費用と、広い設置面積とが必要となるという問題もある。   However, any of the above-described drying furnaces has a problem that the tact time is long because drying takes time. In addition, since it takes time to dry, in order to balance with a pressing process that requires a relatively short process time, it is necessary to lengthen the drying furnace or to provide a plurality of drying furnaces or batch processing furnaces. There is also a problem that equipment costs and a large installation area are required.

一方、金属帯の表面に付着した水分を除去する乾燥装置としては、金属帯の送りロールを通電ロールとすることにより、直接金属帯を通電による抵抗発熱により加熱して乾燥を行うものがある（例えば、特許文献１参照。）。
特開平７−１０３６５３号公報 On the other hand, as a drying device that removes moisture adhering to the surface of the metal band, there is an apparatus that performs drying by directly heating the metal band by resistance heating due to energization by using a feeding roll of the metal band as an energizing roll ( For example, see Patent Document 1.)
JP-A-7-103653

しかしながら、上記乾燥装置は、通電ロールや環状トランスなどを備えた加熱炉を別途設ける必要があり、依然、設備費用と設置面積との面で改善の余地がある。   However, the drying apparatus needs to be separately provided with a heating furnace equipped with an energizing roll and an annular transformer, and there is still room for improvement in terms of equipment cost and installation area.

本発明の解決すべき課題は、乾燥時間の短縮化により生産性の向上を図ると共に、設備費用と設置面積との削減を図ることにある。   The problem to be solved by the present invention is to improve the productivity by shortening the drying time and to reduce the equipment cost and the installation area.

本発明であるプレス加工方法は、成形空間を有する固定型と、当該固定型の成形空間に加工すべきワークを押し込んで所定の形状に成形する可動型とを用いてプレス加工を行うにあたり、前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを通電による抵抗発熱により加熱して当該ワークの表面に塗布した前記潤滑剤を乾燥させたのち、当該ワークを前記可動型と前記固定型との相互間に配してプレス加工を行うことを特徴とするものである。   The press working method according to the present invention includes a fixed mold having a molding space and a movable mold that presses a work to be processed into the molding space of the fixed mold and molds the workpiece into a predetermined shape. A lubricant is applied to the surface of the workpiece, and then the workpiece is heated by resistance heat generation by energization to dry the lubricant applied to the surface of the workpiece, and then the workpiece is moved to the movable mold and the fixed mold. It is characterized by being placed between the two and performing press working.

本発明であるプレス加工方法は、成形空間を有する固定型と、当該固定型の成形空間に加工すべきワークを押し込んで所定の形状に成形する可動型とを用いてプレス加工を行うにあたり、前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを前記固定型に位置せしめて、前記ワークを通電による抵抗発熱により加熱して当該ワークの表面に塗布した前記潤滑剤を乾燥させたのち、前記固定型に前記可動型を合致させてプレス加工を行うことを特徴とするものである。   The press working method according to the present invention includes a fixed mold having a molding space and a movable mold that presses a work to be processed into the molding space of the fixed mold and molds the workpiece into a predetermined shape. Applying a lubricant to the surface of the workpiece, then positioning the workpiece on the fixed mold, heating the workpiece by resistance heat generation by energization, and drying the lubricant applied to the surface of the workpiece, The press working is performed by matching the movable die with the fixed die.

本発明であるプレス加工方法は、成形空間を有する固定型と、当該固定型の成形空間に加工すべきワークを押し込んで所定の形状に成形する可動型とを用いてプレス加工を行うにあたり、前記ワークを前記固定型に位置せしめると共に前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを通電による抵抗発熱により加熱して当該ワークの表面に塗布した前記潤滑剤を乾燥させたのち、前記固定型に前記可動型を合致させてプレス加工を行うことを特徴とするものである。   The press working method according to the present invention includes a fixed mold having a molding space and a movable mold that presses a work to be processed into the molding space of the fixed mold and molds the workpiece into a predetermined shape. After positioning the work on the fixed mold and applying a lubricant to the surface of the work, and then heating the work by resistance heat generation by energization and drying the lubricant applied to the surface of the work, The press working is performed by matching the movable die to the fixed die.

本発明であるプレス加工方法は、ワークを通電による抵抗発熱により加熱してその表面に塗布した潤滑剤を乾燥させるため、従来のように外部から加熱する場合に比べて乾燥が短時間に済むから、タクトタイムが短くなる。また、乾燥が短時間に済むことから、稼働時間が短く済むプレス装置の生産能力に合わせてワークの表面に潤滑被膜を形成することができる。従って、本発明方法によれば、生産性が従来に比べて向上する。   Since the press working method according to the present invention heats the work by resistance heat generation by energization and dries the lubricant applied to the surface thereof, drying can be completed in a shorter time compared to the case of heating from the outside as in the past. , Tact time is shortened. Further, since the drying can be completed in a short time, a lubricating coating can be formed on the surface of the workpiece in accordance with the production capacity of the press machine that can shorten the operation time. Therefore, according to the method of the present invention, the productivity is improved as compared with the conventional method.

また、本発明方法は、プレス加工を行うにあたり、ワークを前記可動型と前記固定型との相互間に配する前の段階でワークを通電による抵抗発熱により加熱することができるが、前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを前記固定型に位置せしめて、前記ワークを通電による抵抗発熱により加熱すれば、潤滑剤の乾燥をプレス加工の一連の動作として行うことができるため、生産性の更なる向上が図れる。加えて、本発明方法によれば、温間・熱間プレス装置に設けられたワーク加熱のための通電加熱装置を流用できるため、設備費用と設置面積との削減を図ることができる。   In the method of the present invention, when performing the press working, the work can be heated by resistance heat generation by energization at a stage before the work is placed between the movable mold and the fixed mold. If a lubricant is applied to the surface, then the workpiece is positioned on the fixed mold, and the workpiece is heated by resistance heat generation by energization, the drying of the lubricant can be performed as a series of press working operations. Further improvement in productivity can be achieved. In addition, according to the method of the present invention, since the energization heating device for heating the workpiece provided in the warm / hot press device can be diverted, the equipment cost and the installation area can be reduced.

また、本発明方法は、プレス加工を行うにあたり、前記ワークを前記固定型に位置せしめると共に前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを通電による抵抗発熱により加熱しても、潤滑剤の乾燥をプレス加工の一連の動作として行うことができるため、生産性の更なる向上が図れる。加えて、本発明方法も、温間・熱間プレス装置に設けられたワーク加熱のための通電加熱装置を流用できるため、設備費用と設置面積との削減を図ることができる。   In addition, the method of the present invention can provide lubrication even when the workpiece is positioned on the fixed mold and a lubricant is applied to the surface of the workpiece, and then the workpiece is heated by resistance heat generated by energization. Since the drying of the agent can be performed as a series of pressing operations, the productivity can be further improved. In addition, the method of the present invention can also reduce the equipment cost and the installation area because the current heating device for heating the workpiece provided in the warm / hot press device can be used.

以下、図面を参照して、本発明の一形態を詳細に説明する。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

図１〜４は、本発明方法を実現するために用いられるプレス成形装置の第一形態を示す模式図である。   FIGS. 1-4 is a schematic diagram which shows the 1st form of the press molding apparatus used in order to implement | achieve the method of this invention.

本装置は、図１に示す板状の金属性ワーク10を、図３に示すようなハット（帽子）形にプレス成形する装置である。ワーク10としては、例えば、引張強さが1GPaを越える超高張力鋼板がある。   This apparatus is an apparatus for press-molding a plate-shaped metallic workpiece 10 shown in FIG. 1 into a hat shape as shown in FIG. As the workpiece 10, for example, there is an ultra-high strength steel plate having a tensile strength exceeding 1 GPa.

固定型11は、その内側に絞り用の成形空間Ｒ1を形成する平坦な縁部11eを有するダイスである。成形空間Ｒ1は、その入側から底部に向かって同径の円柱形をなす。   The fixed die 11 is a die having a flat edge portion 11e that forms a drawing space R1 for drawing inside. The molding space R1 has a cylindrical shape with the same diameter from the entry side toward the bottom.

可動型12は、図示せぬ既存の駆動機構により固定型11に対して上下方向に進退する基部12aと、この基部12aから一体に垂下して当該基部12aの降下によって固定型11の成形空間Ｒにワーク10を押し込んで所定の形状に成形するパンチ12bと、このパンチ12bを取り囲んで基部12aにリターンスプリングSを介して弾性保持される環状のしわ押さえ12cとを備える。これにより、ワーク10を可動型12と固定型11との相互間に配し、可動型12を固定型11に接近させて合致させるとワーク10は所望の形状にプレス成形される。   The movable mold 12 includes a base 12a that moves up and down in the vertical direction with respect to the fixed mold 11 by an existing drive mechanism (not shown), and a molding space R of the fixed mold 11 that is integrally lowered from the base 12a and lowered by the base 12a. A punch 12b for pressing the workpiece 10 into a predetermined shape, and an annular wrinkle presser 12c surrounding the punch 12b and elastically held on the base 12a via a return spring S. Thus, when the workpiece 10 is disposed between the movable die 12 and the fixed die 11, and the movable die 12 is brought close to and matched with the fixed die 11, the workpiece 10 is press-molded into a desired shape.

固定型11の外側には、図１に示すように、ワーク10の下面（後述の潤滑被膜ｃの下面ｃf）に当接して当該ワーク10を成形空間Ｒ1の入側に支持すると共に通電による抵抗発熱により加熱する２つの電極１が設けられている。これらの電極１は、絶縁体２を介してテーブル上に保持されている。   As shown in FIG. 1, the fixed die 11 is in contact with the lower surface of the workpiece 10 (the lower surface cf of a lubricating coating c described later) to support the workpiece 10 on the entry side of the molding space R1 and to resist resistance caused by energization. Two electrodes 1 that are heated by heat generation are provided. These electrodes 1 are held on a table via an insulator 2.

また、電極１は、可動型12の外側に配置した押圧部材13を上部クランプとし、この押圧部材13でワーク10の端縁をクランプして押圧保持する下部クランプとして作用する。押圧力は、ワークの材質やプレス加工される形状に応じて適宜変更可能である。   Further, the electrode 1 acts as a lower clamp that clamps and holds the pressing edge of the workpiece 10 with the pressing member 13 disposed on the outer side of the movable mold 12. The pressing force can be appropriately changed according to the material of the workpiece and the shape to be pressed.

電極１上に載置したワーク10の端縁を押圧部材13で保持した後は、電極１に繋がる図示せぬ電源を用いてワーク10を通電による抵抗発熱により加熱する。通電電圧・通電時間は、ワーク10の材質・形状等に合わせて適宜変更可能である。   After the edge of the workpiece 10 placed on the electrode 1 is held by the pressing member 13, the workpiece 10 is heated by resistance heat generation by energization using a power source (not shown) connected to the electrode 1. The energization voltage and energization time can be appropriately changed according to the material, shape, etc. of the workpiece 10.

次に、図１〜４を参照して、本装置を使用したプレス加工方法を説明する。なお、以下、ワーク10として、長さＬ＝600mm,幅Ｗ＝80mm,厚さｔ＝1.2mmの引張強さが1GPaを越える超高張力鋼板を用いて場合で説明する。   Next, with reference to FIGS. 1-4, the press work method using this apparatus is demonstrated. In the following description, the workpiece 10 is an ultra high strength steel plate having a length L = 600 mm, a width W = 80 mm, and a thickness t = 1.2 mm and a tensile strength exceeding 1 GPa.

先ず、本装置を用いてプレス加工を行うにあたり、ワーク10の表面に潤滑剤ｃとしてプレコート潤滑剤を塗布する。潤滑剤ｃを塗布する方法には、スプレーが最も好ましいが、ワーク10全体を潤滑剤ｃに漬ける等の方法も許容される。   First, when performing press working using this apparatus, a precoat lubricant is applied to the surface of the workpiece 10 as the lubricant c. As a method of applying the lubricant c, spraying is most preferable, but a method of immersing the entire workpiece 10 in the lubricant c is also acceptable.

次いで、図１に示すように、表面に潤滑剤ｃを塗布したワーク10を電極１上に載置して固定型11に位置せしめ、図２に示すように、ワーク10の端縁を押圧部材13によって電極１上にクランプしてワーク10を押圧保持する。この場合、押圧部材13によって負荷する押圧力は、プレス加工時のワーク10にずれによる逃げが補償させる程度でよい。   Next, as shown in FIG. 1, the workpiece 10 having the surface coated with the lubricant c is placed on the electrode 1 and positioned on the fixed die 11, and the edge of the workpiece 10 is pressed against the pressing member as shown in FIG. The workpiece 10 is pressed and held by being clamped on the electrode 1 by 13. In this case, the pressing force applied by the pressing member 13 may be such that the workpiece 10 during press working compensates for the escape due to the shift.

ワーク10が押圧部材13によって押圧されたのちは、ワーク10を通電による抵抗発熱により加熱し、ワーク10の表面に塗布した潤滑剤ｃを乾燥させる。具体的には、通電電圧Ｖ＝10Vで、通電時間0.2（秒）とする。これにより、ワーク10は、600〜900℃の間に抵抗発熱により加熱されるため、潤滑剤ｃが乾燥して、ワーク10の表面には潤滑被膜10ｃが形成される。   After the workpiece 10 is pressed by the pressing member 13, the workpiece 10 is heated by resistance heat generation by energization, and the lubricant c applied to the surface of the workpiece 10 is dried. Specifically, the energization voltage V = 10 V and the energization time 0.2 (seconds). As a result, the workpiece 10 is heated by resistance heat generation between 600 and 900 ° C., so that the lubricant c is dried and a lubricant film 10 c is formed on the surface of the workpiece 10.

次に、押圧部材13を上昇させてワーク10から離間させたのち、図３に示すように、可動型12を固定型11に合致させることにより、ワーク10を成形空間Ｒ1に押し込んで塑性変形させ、平板状のワーク10を図４に示すようなハット形にプレス加工する。この場合、具体例としては、ワーク10を可動型12により成形空間Ｒ1に押し込んで塑性変形させるまでのプレス時間を0.1（秒）とし、それから所定のプレス保持時間として3.5（秒）の間、図３に示すような状態を保持したのち、図４に示すように可動型12を引き上げる。これにより、図４に示すような鍔付きのハット形のプレス成形品が完成する。   Next, after the pressing member 13 is raised and separated from the work 10, as shown in FIG. 3, the work 10 is pushed into the forming space R1 and plastically deformed by matching the movable mold 12 with the fixed mold 11. The flat workpiece 10 is pressed into a hat shape as shown in FIG. In this case, as a specific example, the press time until the workpiece 10 is pushed into the forming space R1 by the movable die 12 to be plastically deformed is 0.1 (second), and then the predetermined press holding time is 3.5 (seconds). After holding the state shown in FIG. 3, the movable mold 12 is pulled up as shown in FIG. Thereby, a hat-shaped press-molded product with a hook as shown in FIG. 4 is completed.

こうしたプレス加工方法は、ワーク10を通電による抵抗発熱により加熱してその表面に塗布した潤滑剤ｃを乾燥させるため、従来のように外部から加熱する場合に比べて乾燥が短時間に済むから、タクトタイムが短くなる。また、乾燥が短時間に済むことから、稼働時間が短く済むプレス装置の生産能力に合わせてワーク10の表面に潤滑被膜10cを形成することができる。従って、本発明方法によれば、生産性が従来に比べて向上する。   In such a press working method, the workpiece 10 is heated by resistance heat generation by energization to dry the lubricant c applied to the surface thereof, so that drying can be completed in a short time compared to the case of heating from the outside as in the past. Tact time is shortened. Further, since the drying can be completed in a short time, the lubricating coating 10c can be formed on the surface of the workpiece 10 in accordance with the production capacity of the press machine that can shorten the operation time. Therefore, according to the method of the present invention, the productivity is improved as compared with the conventional method.

また、本発明方法は、ワーク10の表面に潤滑剤ｃを塗布し、次いで、ワーク10を固定型11に位置せしめて、ワーク10を通電による抵抗発熱により加熱するので、潤滑剤ｃの乾燥をプレス加工の一連の動作として行うことができるため、生産性の更なる向上が図れる。加えて、本発明方法によれば、温間・熱間プレス装置に設けられたワーク加熱のための通電加熱装置を流用できるため、設備費用と設置面積との削減を図ることができる。   Further, in the method of the present invention, the lubricant c is applied to the surface of the workpiece 10, and then the workpiece 10 is positioned on the fixed mold 11, and the workpiece 10 is heated by resistance heat generation by energization. Since it can be performed as a series of press working operations, the productivity can be further improved. In addition, according to the method of the present invention, since the energization heating device for heating the workpiece provided in the warm / hot press device can be diverted, the equipment cost and the installation area can be reduced.

また、本発明方法を用いてプレス加工を行うにあたり、ワーク10を固定型11に位置せしめると共にワーク10の表面に潤滑剤ｃを塗布し、次いで、ワーク10を通電による抵抗発熱により加熱しても、潤滑剤ｃの乾燥をプレス加工の一連の動作として行うことができるため、生産性の更なる向上が図れる。加えて、この方法も、温間・熱間プレス加工機に設けられたワーク加熱のための通電加熱装置を流用できるため、設備費用と設置面積との削減を図ることができる。   Further, when performing press working using the method of the present invention, the workpiece 10 is positioned on the fixed die 11 and the lubricant c is applied to the surface of the workpiece 10, and then the workpiece 10 is heated by resistance heat generation by energization. Further, since the drying of the lubricant c can be performed as a series of press working operations, the productivity can be further improved. In addition, since this method can also use an electric heating device for heating a workpiece provided in a warm / hot press machine, it is possible to reduce the equipment cost and the installation area.

加えて、本発明方法によれば、潤滑剤ｃを乾燥させるための専用の加熱炉等を設ける必要がないため、設備費用と設置面積との削減を図ることができる。   In addition, according to the method of the present invention, it is not necessary to provide a dedicated heating furnace or the like for drying the lubricant c, so that it is possible to reduce the equipment cost and the installation area.

図５〜８は、本発明方法を実現するために用いられるプレス成形装置の第二形態を示す模式図である。   FIGS. 5-8 is a schematic diagram which shows the 2nd form of the press molding apparatus used in order to implement | achieve the method of this invention.

本装置は、図５に示すワーク10を、図８に示すようなカップ形にプレス成形する装置である。固定型21は、その内側に成形空間Ｒ2を形成する平坦な縁部21eを有するダイスである。成形空間Ｒ2は、その入側から底部に向かって小径化する逆円錐台をなす。可動型22は、図示せぬ既存の駆動機構により固定型21に対して上下方向に進退し、固定型21の成形空間Ｒ2にワーク10を押し込んで所定の形状に成形するパンチである。   This apparatus is an apparatus for press-molding the workpiece 10 shown in FIG. 5 into a cup shape as shown in FIG. The fixed die 21 is a die having a flat edge 21e that forms a molding space R2 inside thereof. The molding space R2 forms an inverted truncated cone whose diameter decreases from the entry side toward the bottom. The movable die 22 is a punch that moves up and down in the vertical direction with respect to the fixed die 21 by an existing drive mechanism (not shown) and pushes the workpiece 10 into the forming space R2 of the fixed die 21 to form a predetermined shape.

固定型21の縁部21eには、図５に示すように、ワーク10の下面10fに当接して当該ワーク10を成形空間Ｒ2の入側に支持すると共に通電による抵抗発熱により加熱する２つの電極３が図示せぬ絶縁体を介して設けられている。これらの電極３は、パンチ22の外側に配置した押圧部材23でワーク10の端縁を押圧保持した後、ワーク10を通電による抵抗発熱により加熱する。通電電圧・通電時間は、ワーク10の材質・形状等に合わせて適宜変更可能である。   On the edge 21e of the fixed mold 21, as shown in FIG. 5, two electrodes are brought into contact with the lower surface 10f of the work 10 to support the work 10 on the entry side of the molding space R2 and to be heated by resistance heat generated by energization. 3 is provided via an insulator (not shown). These electrodes 3 press and hold the edge of the workpiece 10 with a pressing member 23 arranged outside the punch 22 and then heat the workpiece 10 by resistance heat generation by energization. The energization voltage and energization time can be appropriately changed according to the material, shape, etc. of the workpiece 10.

次に、本装置を使用したプレス加工方法を説明する。   Next, a press working method using this apparatus will be described.

先ず、本装置を用いてプレス加工を行うにあたり、ワーク10の表面に潤滑剤ｃを塗布する。   First, in performing press working using this apparatus, a lubricant c is applied to the surface of the workpiece 10.

次いで、図５に示すように、表面に潤滑剤ｃを塗布したワーク10を電極３上に載置して固定型21に位置せしめ、図６に示すように、ワーク10の端縁を押圧部材23によって電極３上に押圧保持する。この場合も、押圧部材23によって負荷する押圧力は、プレス加工時のワーク10にずれによる逃げが補償させる程度でよい。   Next, as shown in FIG. 5, the workpiece 10 having the surface coated with the lubricant c is placed on the electrode 3 and positioned on the fixed die 21, and the edge of the workpiece 10 is pressed against the pressing member as shown in FIG. The electrode 23 is pressed and held by the electrode 23. Also in this case, the pressing force applied by the pressing member 23 may be such that the workpiece 10 during press working compensates for the escape due to the shift.

ワーク10が押圧部材23によって押圧されたのちは、ワーク10を通電による抵抗発熱により加熱し、ワーク10の表面に塗布した潤滑剤ｃを乾燥させる。これにより、ワーク10の表面には、潤滑被膜10cが形成されるため、図７に示すように可動型22により、ワーク10を成形空間Ｒ2に押し込んで塑性変形させ、平板状のワーク10を図８に示すようなカップ形にプレス加工する。   After the workpiece 10 is pressed by the pressing member 23, the workpiece 10 is heated by resistance heat generation by energization, and the lubricant c applied to the surface of the workpiece 10 is dried. As a result, a lubricating coating 10c is formed on the surface of the work 10, so that the work 10 is pushed into the forming space R2 and plastically deformed by the movable die 22 as shown in FIG. Press into a cup shape as shown in FIG.

この場合も、ワークを通電による抵抗発熱により加熱してその表面に塗布した潤滑剤ｃを乾燥させるため、第一形態と同様、生産性が従来に比べて向上する。また、この場合も、ワーク10を固定型21に位置せしめると共にそのワーク10の表面に潤滑剤ｃを塗布し、次いで、ワーク10を通電による抵抗発熱により加熱すれば、図１〜４に係る装置で本発明方法を使用した場合と同様の作用効果を奏する。   Also in this case, since the workpiece is heated by resistance heat generation by energization and the lubricant c applied to the surface is dried, the productivity is improved as compared with the first embodiment. Also in this case, if the workpiece 10 is positioned on the fixed mold 21, the lubricant c is applied to the surface of the workpiece 10, and then the workpiece 10 is heated by resistance heat generation by energization, the apparatus according to FIGS. Thus, the same effects as those obtained when the method of the present invention is used are obtained.

上述したところは、本発明の好適な形態を示したものであるが、請求の範囲内において種々の変更を加えることができる。例えば、第一形態〜第二形態として示すプレス加工方法の各工程及び装置の各要素は、それぞれ適宜組み合わせることができる。   The above description shows preferred forms of the present invention, but various modifications can be made within the scope of the claims. For example, each step of the press working method shown as the first form to the second form and each element of the apparatus can be appropriately combined.

更に、固定型と、可動型とを用いてプレス加工を行うにあたり、ワークを前記可動型と前記固定型との相互間に配する前の段階で、ワーク10の表面に潤滑剤ｃを塗布し、次いで、ワーク10を通電による抵抗発熱により加熱し、当該ワーク10の表面10fに塗布した潤滑剤ｃを乾燥させてもよい。   Further, in performing press working using the fixed mold and the movable mold, a lubricant c is applied to the surface of the workpiece 10 before the work is placed between the movable mold and the fixed mold. Then, the workpiece 10 may be heated by resistance heat generation by energization, and the lubricant c applied to the surface 10f of the workpiece 10 may be dried.

本形態に係るプレス加工は、絞り加工として説明したが、その形態は曲げ加工やせん断加工であってもよい。   Although the press working according to the present embodiment has been described as drawing, the form may be bending or shearing.

本発明方法を実現するためのプレス成形装置の第一形態をワーク載置状態で示す模式図である。It is a schematic diagram which shows the 1st form of the press molding apparatus for implement | achieving the method of this invention in a workpiece | work mounting state. 同形態において、電極上に載置したワークを押圧部材によりクランプして通電を行う状態を示す模式図である。In the same form, it is a schematic diagram which shows the state which clamps the workpiece | work mounted on the electrode with a press member, and performs electricity supply. 同形態において、ワークを可動型により塑性変形させている状態を示す模式図である。In the same form, it is a schematic diagram which shows the state which is plastically deforming the workpiece | work with a movable mold | type. 同形態において、塑性変形を行った後、可動型を上昇させてプレス成形品を取り出す直前の状態を示す模式図である。In the same form, it is a schematic diagram which shows the state just before taking out a press-molded product by raising a movable mold | type after performing plastic deformation. 本発明方法を実現するためのプレス成形装置の第二形態をワーク載置状態で示す模式図である。It is a schematic diagram which shows the 2nd form of the press molding apparatus for implement | achieving the method of this invention in a workpiece mounting state. 同形態において、電極上に載置したワークを押圧部材によりクランプして通電を行う状態を示す模式図である。In the same form, it is a schematic diagram which shows the state which clamps the workpiece | work mounted on the electrode with a press member, and performs electricity supply. 同形態において、ワークを可動型により塑性変形させている状態を示す模式図である。In the same form, it is a schematic diagram which shows the state which is plastically deforming the workpiece | work with a movable mold | type. 同形態において、塑性変形を行った後、可動型を上昇させてプレス成形品を取り出した状態を示す模式図である。In the same form, after performing plastic deformation, it is a schematic diagram which shows the state which raised the movable mold | type and took out the press-formed product.

符号の説明Explanation of symbols

１ 電極（下部クランプ）
２ 絶縁体
３ 電極（下部クランプ）
５ 電極（下部クランプ）
10 ワーク
11 ダイス（固定型）
12 可動型
12a 可動型基台
12b ポンチ
12c しわ押さえ
13 押圧部材（上部クランプ）
21 ダイス（固定型）
22 可動型（パンチ）
23 押圧部材（上部クランプ）
33 押圧部材（上部クランプ） 1 Electrode (lower clamp)
2 Insulator 3 Electrode (lower clamp)
5 Electrode (lower clamp)
10 work
11 Dies (fixed type)
12 Movable type
12a Movable base
12b punch
12c Wrinkle retainer
13 Pressing member (upper clamp)
21 Dies (fixed type)
22 Movable type (punch)
23 Press member (upper clamp)
33 Pressing member (upper clamp)

Claims (3)

成形空間を有する固定型と、当該固定型の成形空間に加工すべきワークを押し込んで所定の形状に成形する可動型とを用いてプレス加工を行うにあたり、
前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを通電による抵抗発熱により加熱して当該ワークの表面に塗布した前記潤滑剤を乾燥させたのち、当該ワークを前記可動型と前記固定型との相互間に配してプレス加工を行うことを特徴とするプレス加工方法。 When performing press working using a fixed mold having a molding space and a movable mold that pushes a work to be processed into the molding space of the fixed mold and molds it into a predetermined shape,
A lubricant is applied to the surface of the workpiece, and then the workpiece is heated by resistance heat generation by energization to dry the lubricant applied to the surface of the workpiece, and then the workpiece is moved to the movable mold and the fixed mold. A press working method characterized in that press working is performed between the two. 成形空間を有する固定型と、当該固定型の成形空間に加工すべきワークを押し込んで所定の形状に成形する可動型とを用いてプレス加工を行うにあたり、
前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを前記固定型に位置せしめて、前記ワークを通電による抵抗発熱により加熱して当該ワークの表面に塗布した前記潤滑剤を乾燥させたのち、前記可動型を前記固定型に合致させてプレス加工を行うことを特徴とするプレス加工方法。 When performing press working using a fixed mold having a molding space and a movable mold that pushes a work to be processed into the molding space of the fixed mold and molds it into a predetermined shape,
A lubricant is applied to the surface of the workpiece, and then the workpiece is positioned on the fixed mold, and the workpiece is heated by resistance heat generated by energization to dry the lubricant applied to the surface of the workpiece. A press working method, wherein the movable die is pressed with the fixed die. 成形空間を有する固定型と、当該固定型の成形空間に加工すべきワークを押し込んで所定の形状に成形する可動型とを用いてプレス加工を行うにあたり、
前記ワークを前記固定型に位置せしめると共に前記ワークの表面に潤滑剤を塗布し、次いで、前記ワークを通電による抵抗発熱により加熱して当該ワークの表面に塗布した前記潤滑剤を乾燥させたのち、前記固定型に前記可動型を合致させてプレス加工を行うことを特徴とするプレス加工方法。 When performing press working using a fixed mold having a molding space and a movable mold that pushes a work to be processed into the molding space of the fixed mold and molds it into a predetermined shape,
After positioning the workpiece on the fixed mold and applying a lubricant to the surface of the workpiece, and then drying the lubricant applied to the surface of the workpiece by heating the workpiece by resistance heat generation by energization, A press working method, wherein the movable die is matched with the fixed die.
JP2006083629A 2006-03-24 2006-03-24 Press working method Pending JP2007253219A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007260761A (en) * 2006-03-30 2007-10-11 Nisshin Steel Co Ltd Hot press forming device
WO2015160109A1 (en) * 2014-04-18 2015-10-22 울산대학교 산학협력단 Metal surface processing apparatus
JP2023522832A (en) * 2020-03-23 2023-06-01 ノベリス・インコーポレイテッド Device and method configured to manipulate friction between workpiece and deep drawing tool in deep drawing process
JP7392922B2 (en) 2020-09-25 2023-12-06 エルジー エナジー ソリューション リミテッド Pouch type battery case forming device including volatile lubricant supply section and method for manufacturing pouch type battery case using the same

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WO1999042639A1 (en) * 1998-02-18 1999-08-26 Nippon Steel Corporation Anticorrosive coating material and method of rust prevention
JP2002143935A (en) * 2000-11-13 2002-05-21 Sumitomo Metal Ind Ltd Warm press forming method of metal plate
JP2005205451A (en) * 2004-01-22 2005-08-04 Jfe Steel Kk Method for press-forming steel sheet

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WO1999042639A1 (en) * 1998-02-18 1999-08-26 Nippon Steel Corporation Anticorrosive coating material and method of rust prevention
JP2002143935A (en) * 2000-11-13 2002-05-21 Sumitomo Metal Ind Ltd Warm press forming method of metal plate
JP2005205451A (en) * 2004-01-22 2005-08-04 Jfe Steel Kk Method for press-forming steel sheet

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007260761A (en) * 2006-03-30 2007-10-11 Nisshin Steel Co Ltd Hot press forming device
WO2015160109A1 (en) * 2014-04-18 2015-10-22 울산대학교 산학협력단 Metal surface processing apparatus
KR101572472B1 (en) 2014-04-18 2015-11-27 울산대학교 산학협력단 Surface Machining Apparatus for Metal
JP2023522832A (en) * 2020-03-23 2023-06-01 ノベリス・インコーポレイテッド Device and method configured to manipulate friction between workpiece and deep drawing tool in deep drawing process
JP7437527B2 (en) 2020-03-23 2024-02-22 ノベリス・インコーポレイテッド Device and method configured to manipulate friction between a workpiece and a deep drawing tool in a deep drawing process
JP7392922B2 (en) 2020-09-25 2023-12-06 エルジー エナジー ソリューション リミテッド Pouch type battery case forming device including volatile lubricant supply section and method for manufacturing pouch type battery case using the same

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