JPH05293581A - Forming method and die of web-rib shape part - Google Patents
Forming method and die of web-rib shape partInfo
- Publication number
- JPH05293581A JPH05293581A JP4096695A JP9669592A JPH05293581A JP H05293581 A JPH05293581 A JP H05293581A JP 4096695 A JP4096695 A JP 4096695A JP 9669592 A JP9669592 A JP 9669592A JP H05293581 A JPH05293581 A JP H05293581A
- Authority
- JP
- Japan
- Prior art keywords
- web
- die
- reduction
- mold
- molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/008—Incremental forging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属材料の精密プレス
型鍛造法に関わり、特には、リブに囲まれた複数のウエ
ブを有してなるウエブリブ形状品の成形方法および金型
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precision press die forging method for a metal material, and more particularly to a method and a die for forming a web-shaped article having a plurality of webs surrounded by ribs.
【０００２】[0002]
【従来の技術】近年、精密型鍛造技術の進展に伴い、リ
ブに囲まれた複数のウエブを有してなり、その成形が困
難なウエブリブ形状品についてもニヤネットシェイプに
型鍛造されるようになっている。そして、これらウエブ
リブ形状品をニァネットシェイプに型鍛造するについて
は、通常、その概要説明断面図である〔図４〕の (a)図
に示すような上下金型(41),(42) を用いるコンベンショ
ナル鍛造法や、 (b)図に示すようにダイインサート(45)
内に上下ポンチ(46),(47) を圧入させるノードラフト鍛
造法が適用されていた。2. Description of the Related Art In recent years, with the progress of precision die forging technology, even web-shaped products which have a plurality of webs surrounded by ribs and are difficult to form are die-forged into a near net shape. Is becoming For die forging these web-shaped products into a net shape, it is usual to use upper and lower dies (41), (42) as shown in (a) of FIG. 4 which is a schematic explanatory sectional view. The conventional forging method used and the die insert (45) as shown in (b)
The nodal raft forging method in which the upper and lower punches (46) and (47) were press-fitted was applied.
【０００３】一方、近来では例えば航空機のアルミ合金
機体部材の傾向に見られるように、軽量化と構造強度と
を併せ達成するため、より大型なウエブリブ形状品を一
体に成形することが求められるようになっている。しか
し、大型のウエブリブ形状品を、コンベンショナルおよ
びノードラフト鍛造法にてニヤネットシェイプないしネ
ットシェイプに成形するには、非常に大きな力量のプレ
ス装置が必要とされ、これがウエブリブ形状品の大型化
の一つの阻害要因となっていた。そこで、プレス力量の
増大を必要としない成形技術が求められ、これに対応で
きるものとして、例えば「Forging,Eqipment,Material
s,and,Practis.(1973) 」に報告されているような逐次
鍛造法(Incremental Forging)が開発されている。On the other hand, recently, for example, as seen in the tendency of aluminum alloy body members of aircraft, it is required to integrally form a larger web-shaped product in order to achieve both weight reduction and structural strength. It has become. However, in order to form a large web-shaped product into a near net shape or a net shape by the conventional and nodal raft forging methods, a pressing device with an extremely large force is required, which is one of the reasons for making the web-shaped product larger It was one hindrance. Therefore, there is a demand for molding technology that does not require an increase in the pressing force. For example, “Forging, Eqipment, Material
s, and, Practis. (1973) ”, the incremental forging method (Incremental Forging) has been developed.
【０００４】この逐次鍛造法は、その概要説明断面図で
ある〔図５〕の (a)図〜 (c)図に示すように、上開放形
の金型(51)内に配置したブランクＢのウエブ成形部位そ
れぞれに、ウエブ形状に対応する先端形状を有するスタ
ンプ(52)を、順次かつ周期的に繰り返して圧入させて、
各ウエブＷおよびその周囲のリブＲを逐次に成形するこ
とで、比較的小さな力量のプレス装置にて大型のウエブ
リブ形状品の成形を可能とするものである。This sequential forging method is a blank B arranged in an upper open mold (51) as shown in FIGS. 5 (a) to 5 (c), which are schematic sectional views of the sequential forging method. A stamp (52) having a tip shape corresponding to the web shape is press-fitted into each of the web-molded parts of, sequentially and periodically and repeatedly,
By sequentially forming each web W and the ribs R around the web W, a large web-shaped product can be formed by a pressing device with a relatively small force.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記逐
次鍛造法では、比較的小さな力量のプレス装置で大型の
ウエブリブ形状品を成形できるものの、各ウエブ成形部
位にスタンプ(52)を圧入するに続いて離脱させて、順次
に各ウエブＷおよびその周囲のリブＲを成形して行くの
で、先に成形されたウエブ上が中空となり、この中空部
に対する材料の流れを規制し難いため、これに隣接する
他のウエブ成形部にスタンプを圧入させる際にメタルフ
ローが逆流して、引けや折れ込みなどの鍛造欠陥が発生
し易い。特に、薄肉なウエブリブ形状品を成形する場合
には欠陥の発生が顕著となり、これがため成形品の寸法
精度を高め難い。However, in the above-mentioned sequential forging method, although a large web-shaped product can be formed by a pressing device with a relatively small force, the stamp (52) is pressed into each web-forming site. Since the respective webs W and the ribs R around the webs W are sequentially formed by separating them from each other, the previously formed web becomes hollow, and it is difficult to regulate the flow of the material to the hollow portions. When the stamp is press-fitted into another web forming portion, the metal flow is reversely flowed, and forging defects such as shrinkage and bending are likely to occur. In particular, when a thin web-shaped product is molded, defects are remarkable, which makes it difficult to improve the dimensional accuracy of the molded product.
【０００６】本発明は、上記従来技術の問題点を解消す
べくなされたもので、比較的小さな力量のプレス装置で
もつて大型のウエブリブ形状品を成形でき、しかも鍛造
欠陥の発生を抑えて高い寸法精度に成形することのでき
るウエブリブ形状品の成形方法および金型を提供するこ
とを目的とする。The present invention has been made to solve the above-mentioned problems of the prior art. It is possible to form a large web-shaped product with a pressing device having a relatively small amount of force, and suppress the occurrence of forging defects to obtain a high size. An object of the present invention is to provide a method for molding a web-shaped product and a mold that can be molded with high accuracy.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は以下の構成とされている。すなわち、本
発明に係るウエブリブ形状品の成形方法は、リブに囲ま
れた複数のウエブを有してなるウエブリブ形状品をプレ
ス型鍛造するに際して、各ウエブ部を成形する金型のス
タンプ部を、金型内に配置されたブランクに個別かつ順
次に圧入させてゆき、各ウエブおよびその周囲のリブを
逐次に成形することを特徴とする。In order to achieve the above object, the present invention has the following constitution. That is, the method of molding a web-shaped product according to the present invention is, when press-forging a web-shaped product having a plurality of webs surrounded by ribs, a stamp portion of a mold for molding each web portion, It is characterized in that blanks arranged in a mold are individually and sequentially press-fitted to successively form each web and its surrounding ribs.
【０００８】また、本発明に係るウエブリブ形状品の成
形金型は、リブに囲まれた複数のウエブを有してなるウ
エブリブ形状品を成形するインプレッションを備えた上
下金型であって、上金型が、上金型本体内に各ウエブ部
を成形する複数のスタンプ部を個別に上下動可能に有す
ると共に、上金型本体の上部に各スタンプ部それぞれに
連結させた圧下ロッドを貫通せしめて有し、それら圧下
ロッドの上部に段差圧下盤を備えてなることを特徴とす
る。The molding die for a web-shaped product according to the present invention is an upper and lower mold provided with an impression for molding a web-shaped product having a plurality of webs surrounded by ribs. The mold has a plurality of stamp parts that individually move each web part in the upper mold body so as to be vertically movable, and the pressing rods connected to the respective stamp parts are passed through the upper part of the upper mold body. It is characterized in that it has a step reduction plate on the upper part of the reduction rods.
【０００９】[0009]
【作用】本発明の成形方法では、リブに囲まれた複数の
ウエブを有してなるウエブリブ形状品をプレス型鍛造す
るに際して、各ウエブ部を成形する金型の複数のスタン
プ部を、金型内に配置されたブランクに個別かつ順次に
圧入させてゆき、各ウエブおよびその周囲のリブを逐次
に成形するので、その成形に要するプレスの力量が小さ
くてすむ。また、成形中において各ウエブ上それぞれに
スタンプ部を個別に圧入させるので、それらの存在によ
りメタルフローを規制して逆流を抑制し、成形中におけ
るメタルフローの逆流に起因する引けや折れ込みなどの
鍛造欠陥の発生を防止できる。According to the molding method of the present invention, when press-forging a web-shaped product having a plurality of webs surrounded by ribs, a plurality of stamp parts of a mold for forming each web part are The blanks arranged inside are press-fitted individually and sequentially, and each web and the ribs around it are sequentially molded, so that the force of the press required for the molding can be small. In addition, since the stamp parts are individually press-fitted onto each web during molding, the metal flow is regulated by their presence to suppress backflow, and shrinkage and folds caused by the backflow of metal flow during molding are prevented. It is possible to prevent the occurrence of forging defects.
【００１０】また、本発明の成形金型では、ウエブリブ
形状品を成形するインプレッションを備えた上下金型の
上金型が、上金型本体内に各ウエブ部を成形する複数の
スタンプ部を個別に上下動可能に有すると共に、上金型
本体の上部に各スタンプ部それぞれに連結させた圧下ロ
ッドを貫通せしめて有し、それら圧下ロッドの上部に段
差圧下盤を備えてなるので、下金型内に配置されたブラ
ンクに、上金型本体内の各スタンプ部を個別かつ順次に
圧入させてゆき、各ウエブおよびその周囲のリブを逐次
に成形することができる。また、各スタンプ部を個別か
つ順次にブランクに圧入させて成形することで、その成
形に要するプレスの力量を小さくすることができる。ま
た、成形中において各ウエブ上それぞれにスタンプ部を
個別に圧入させるので、それらの存在によりメタルフロ
ーを規制して逆流を抑制し、その逆流に起因する引けや
折れ込みなどの鍛造欠陥の発生を防止できる。Further, in the molding die of the present invention, the upper mold of the upper and lower molds having the impression for molding the web-shaped article has a plurality of stamp parts for molding each web part in the upper mold body individually. In addition to having up and down movement, the lower die is provided with a reduction rod connected to each stamp part at the upper part of the upper mold body, and a step reduction plate is provided on the upper part of the reduction rod. The stamps in the upper mold body can be individually and sequentially press-fitted into the blank arranged therein to sequentially mold the webs and the ribs around them. Further, by individually and sequentially press-fitting each stamp portion into the blank to perform molding, it is possible to reduce the pressing force required for the molding. In addition, since stamp parts are pressed into each web individually during molding, metal flow is controlled by their presence to suppress backflow, and the occurrence of forging defects such as shrinkage and bending due to the backflow. It can be prevented.
【００１１】[0011]
【実施例】本発明の実施例を図面を参照して、以下に説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】〔図１〕は本発明の実施例のウエブリブ形
状品の成形方法の概要説明図であって、 (a)図は成形初
期段階の状態を示す断面図、 (b)図は成形中間段階の状
態を示す断面図、 (c)図は成形終了段階の状態を示す断
面図、 (d)図は成形後のウエブリブ形状品の一部を切り
欠いて示す斜視図である。FIG. 1 is a schematic explanatory view of a method for molding a web-shaped product according to an embodiment of the present invention, in which (a) is a sectional view showing a state at an initial stage of molding, and (b) is an intermediate molding. FIG. 6 is a sectional view showing a state of a stage, FIG. 7 (c) is a sectional view showing a state of a stage at the end of molding, and FIG.
【００１３】まず、本実施例に用いた金型の概要構成を
説明すると、〔図１〕の (a)図において、(1) は上金型
であって、この上金型(1) は、 (c)図に示す目的のウエ
ブリブ形状品Ｍの外郭形状に対応する断面形状の凹部(2
a)を下面に設けた本体部(2)と、この本体部(2) の凹部
(2a)内に個別に上下動可能に嵌入された複数のスタンプ
部(3) とを備えなり、通常のコンベンショナル金型の形
態をとる下金型(4) とで対をなし、両者間内部にウエブ
リブ形状品Ｍを成形するインプレッションを形成せしめ
たものである。First, the schematic structure of the mold used in this embodiment will be described. In FIG. 1 (a), (1) is an upper mold, and this upper mold (1) is , (C) a concave portion (2 with a cross-sectional shape corresponding to the outer shape of the target web-shaped product M shown in FIG.
body part (2) with a) on the bottom and the concave part of this body part (2)
(2a) is equipped with a plurality of stamp parts (3) that are individually fitted so that it can move up and down, and forms a pair with a lower mold (4) that takes the form of a conventional conventional mold, and the inside of both Impressions for forming the web-shaped product M are formed on the.
【００１４】ここで、上金型(1) のスタンプ部(3) それ
ぞれは、ウエブリブ形状品Ｍの各ウエブＷの平面形状に
対応する横断面形状の先端部(3a)を有してなり、それぞ
れの先端部(3a)間および下金型(4) 内側面との間に、各
ウエブＷの周囲に成形されるべきリブＲの形状に対応す
るインプレッションを形成するものとされている。Here, each of the stamp portions (3) of the upper die (1) has a tip portion (3a) having a cross-sectional shape corresponding to the planar shape of each web W of the web-shaped product M, Impressions corresponding to the shape of the rib R to be formed around each web W are formed between the respective tip portions (3a) and the inner surface of the lower mold (4).
【００１５】(5) は圧下ロッドであって、この圧下ロッ
ド(5) は、上金型(1) の各スタンプ部(3) それぞれの上
方に位置する本体部(2) の上部壁を上下方向に貫通し、
それぞれの下端部を各スタンプ部(3) の上端部に連結さ
せると共に、拡径された上端部を本体部(2) の上面から
上方に突出させて上下動可能に複数挿設されてある。ま
た、これら圧下ロッド(5) は、互いに高さ方向の寸法を
同寸法とされると共に、拡径された上端部の上面を平滑
面に形成されてあり、この構成のもとで、上方からの圧
下力を各スタンプ部(3) に伝達するものとされている。(5) is a reduction rod, and this reduction rod (5) moves up and down the upper wall of the main body (2) located above each stamp (3) of the upper die (1). Penetrating in the direction
A plurality of lower end portions are connected to the upper end portions of the respective stamp portions (3), and a plurality of diameter-enlarged upper end portions are projected upward from the upper surface of the main body portion (2) so that a plurality of them can be moved vertically. In addition, these pressing rods (5) have the same dimension in the height direction, and the upper surface of the enlarged upper end is formed to be a smooth surface. It is supposed that the rolling force of the stamp is transmitted to each stamp part (3).
【００１６】(6) は段差圧下盤であって、この段差圧下
盤(6) は、上面を平滑面に形成される一方で、下面を所
定寸法の段差を有する２段平面に形成されて、厚肉部(6
a)と薄肉部(6b)とを有する平板状のもので、各圧下ロッ
ド(5) の上方に位置して配置されている。また、この段
差圧下盤(6) は、その両下側に配されたバネシリンダ
(7) を介して水平方向に移動可能に上金型(1) の本体部
(2) に支持されると共に、その側方に配設された駆動シ
リンダ(8) に連結されてあり、上方から加圧されていな
い無負荷状態では、この駆動シリンダ(8) の作動によっ
て段差のある横方向に任意のピッチで移動できるものと
されている。[0016] (6) is a step reduction platen, and the step reduction plate (6) has an upper surface formed as a smooth surface and a lower surface formed as a two-step plane having a step having a predetermined size, Thick part (6
It is a flat plate having a) and a thin portion (6b), and is arranged above each rolling rod (5). Also, this step lowering plate (6) is provided with spring cylinders arranged on both lower sides of the plate.
The body of the upper mold (1) can be moved horizontally via (7).
It is supported by (2) and is connected to the drive cylinder (8) arranged on the side of the drive cylinder (8), and when no load is applied from above, there is a step due to the operation of this drive cylinder (8). It is supposed to be able to move in a certain horizontal direction at an arbitrary pitch.
【００１７】一方、バネシリンダ(7) は、段差圧下盤
(6) を下方から押し上げて支持し、この段差圧下盤(6)
が上方から加圧されない無負荷状態では、その厚肉部(6
a)の下面と各圧下ロッド(5) の上面との間に一定の間隔
を保たせて、駆動シリンダ(8)の作動による横方向への
移動を容易かつ円滑なものとする役割を果たす。On the other hand, the spring cylinder (7) is a step reduction plate.
(6) is pushed up from below to support it, and this step reduction plate (6)
When no load is applied from above, the thick part (6
A constant distance is maintained between the lower surface of a) and the upper surface of each rolling rod (5) to facilitate the lateral movement of the driving cylinder (8) in an easy and smooth manner.
【００１８】上記構成の金型では、下面に段差を設けた
段差圧下盤(6) をプレスの圧下アンビルＡにて圧下さ
せ、かつ、その圧下の都度に段差圧下盤(6) の厚肉部(6
a)の横方向の移動位置を順次に変更することで、上金型
(1) の各スタンプ部(3) を個別かつ順次に圧下させるこ
とができる。In the die having the above structure, the step reduction plate (6) having a step on the lower surface is reduced by the reduction anvil A of the press, and the thick portion of the step reduction plate (6) is reduced each time. (6
By sequentially changing the horizontal movement position of a), the upper mold
The stamp parts (3) of (1) can be individually and sequentially pressed.
【００１９】次いで、上記構成の金型を用いた本実施例
のウエブリブ形状品の成形方法を説明する。Next, a method of molding the web-shaped article of this embodiment using the mold having the above construction will be described.
【００２０】まず、所定温度に加熱された平板状のブラ
ンクＢを下金型(4) 内に装入すると共に、これらの上に
上金型(1) および段差圧下盤(6) をセットする。このと
き、段差圧下盤(6) の厚肉部(6a)を、上金型(1) の各圧
下ロッド(5) の内の最外側に位置している第１の圧下ロ
ッド(5) の上方に位置させておく。First, a flat plate-shaped blank B heated to a predetermined temperature is loaded into the lower mold (4), and the upper mold (1) and the step reduction platen (6) are set on them. .. At this time, the thick portion (6a) of the step reduction plate (6) is connected to the first reduction rod (5) located on the outermost side of each reduction rod (5) of the upper mold (1). Keep it above.
【００２１】次に、この状態で、プレスの圧下アンビル
Ａにより段差圧下盤(6) に圧下を加え、 (a)図に示すよ
うに、その厚肉部(6a)を介して第１の圧下ロッド(5) を
圧下させ、これに接続された第１のスタンプ部(3) の先
端部(3a)をブランクＢに圧入させる。このとき、第１の
スタンプ部(3) の先端部(3a)と下金型(4) との間のブラ
ンクＢの材料が圧縮されて流れ、これらの間にウエブＷ
が形成されると共に、その先端部(3a)の周囲には上方に
向かう材料の流れが生じてリブＲが形成される。Next, in this state, a reduction anvil A of the press applies a reduction to the step reduction platen (6), and as shown in FIG. 2 (a), the first reduction plate is passed through the thick portion (6a). The rod (5) is pressed down, and the tip portion (3a) of the first stamp part (3) connected thereto is pressed into the blank B. At this time, the material of the blank B between the tip portion (3a) of the first stamp portion (3) and the lower die (4) is compressed and flows, and the web W is interposed between them.
And the rib R is formed around the tip portion (3a) by the upward flow of material.
【００２２】なお、本実施例では、この圧下のストロー
クエンドにおいて、段差圧下盤(6)の薄肉部(6b)の下面
を第１の圧下ロッド(5) 以外の各圧下ロッド(5) に当接
させ、これにより第１のスタンプ部(3) 以外の各スタン
プ部(3) の先端部(3a)をブランクＢに軽く圧入させて、
このブランクＢを下金型(4) 内に馴染ませた。In this embodiment, at the stroke end of this reduction, the lower surface of the thin portion (6b) of the step reduction plate (6) hits each reduction rod (5) other than the first reduction rod (5). The tip portions (3a) of the stamp portions (3) other than the first stamp portion (3) are lightly pressed into the blank B by this,
This blank B was made to fit in the lower mold (4).
【００２３】次いで、プレスの圧下アンビルＡを所定高
さ位置まで上昇させると共に、駆動シリンダ(8) によっ
て段差圧下盤(6) を横方向への移動させ、その厚肉部(6
a)を第１の圧下ロッド(5) に隣接する第２の圧下ロッド
(5) の上方に位置させた後に、再びプレスの圧下アンビ
ルＡにより段差圧下盤(6) に圧下を加え、 (b)図に示す
ように、その厚肉部(6a)を介して第２の圧下ロッド(5)
を圧下させ、これに接続された第２のスタンプ部(3) の
先端部(3a)をブランクＢに圧入させて、同様に第２番目
のウエブＷとその周囲のリブＲを形成せしめる。Next, the pressing anvil A of the press is raised to a predetermined height position, and the step reduction plate (6) is moved in the lateral direction by the drive cylinder (8), and the thick part (6
a) a second reduction rod adjacent to the first reduction rod (5)
After it is located above (5), it is again pressed down by the pressing anvil A of the press to the step reduction platen (6), and as shown in FIG. Rolling rod (5)
Is pressed down, and the tip portion (3a) of the second stamp portion (3) connected thereto is pressed into the blank B to form the second web W and the ribs R around it in the same manner.
【００２４】続いて、上記と同様に圧下アンビルＡを上
昇させると共に、段差圧下盤(6) を横方向への移動さ
せ、その厚肉部(6a)を、第２の圧下ロッド(5) に隣接す
る第３の圧下ロッド(5) の上方に位置させた後に、再び
プレスの圧下アンビルＡにより段差圧下盤(6) に圧下を
加え、 (c)図に示すように、その厚肉部(6a)を介して第
３の圧下ロッド(5) を圧下させ、これに接続された第３
のスタンプ部(3) の先端部(3a)をブランクＢに圧入させ
て、同様に第３番目のウエブＷとその周囲のリブＲを形
成せしめて、 (d)図に示すように、リブＲに囲まれた複
数のウエブＷを有してなるウエブリブ形状品Ｍに成形す
るのである。Subsequently, the pressing anvil A is raised in the same manner as above, and the step pressing plate (6) is moved in the lateral direction, and the thick portion (6a) thereof is attached to the second pressing rod (5). After being positioned above the adjacent third reduction rod (5), the reduction anvil A of the press again applies reduction to the step reduction plate (6), and as shown in FIG. The third rod (5) is pressed down via 6a), and the third rod connected to this is pressed down.
The tip portion (3a) of the stamp portion (3) is press-fitted into the blank B to form the third web W and the rib R around it similarly, and as shown in FIG. A web-shaped product M having a plurality of webs W surrounded by is formed.
【００２５】以上に述べた構成の金型および成形方法に
基づいて、長さ 150mm、幅 120mm、高さ36mmの外郭形状
とされた、アルミニウム合金材からなるウエブリブ形状
品Ｍを成形した。また、比較のために、従来のノードラ
フト鍛造法に基づいて、同材質で同形状のウエブリブ形
状品Ｍを成形した。なお、これらウエブリブ形状品Ｍの
リブ部Ｒの厚さｔr は 4.5mmに設定し、またウエブ部Ｗ
の厚さｔw も同 4.5mmに成形することを目標とした。A web-shaped product M made of an aluminum alloy material having an outer shape with a length of 150 mm, a width of 120 mm, and a height of 36 mm was molded based on the mold and molding method having the above-described structure. For comparison, a web-shaped product M of the same material and having the same shape was formed based on the conventional node raft forging method. The thickness tr of the rib portion R of these web-shaped products M is set to 4.5 mm, and the web portion W
The target was to form a thickness tw of 4.5 mm.
【００２６】そして、それぞれの成形に要した最大加圧
荷重と、得られた製品の形状寸法および表面品質を調べ
た。その結果、比較例のものは、その成形に要した最大
加圧荷重が 350ton に達したにもかかわらず、製品のウ
エブ厚さは 5.0mmで止まっていたのに対して、本実施例
のものは、比較例の場合よりも遙かに低い 240ton の最
大加圧荷重にて、製品のウエブ厚さを、目標値とほぼ同
等の 4.6mmに成形することができた。また、本実施例の
製品は、比較例のものと同様に、いずれも欠陥の無い健
全な表面品質のものであり、本発明方法が、従来の精密
鍛造法と同等ないしはそれ以上の寸法精度にて、しかも
遙かに低い加圧力量のもとでウエブリブ形状品を成形で
きるという優れた効果を有することを確認することがで
きた。また、本実施例の金型および成形方法では、その
加圧手段として用いるプレス装置は、複動式プレス装置
などの複雑で大掛かりな加圧装置でなく、極一般的な汎
用形の単動式プレス装置にて充分その目的を達成でき
た。一方、金型は、ダイセットの形でプレス装置に装着
することができ、その装脱も容易であった。Then, the maximum pressure load required for each molding and the shape and surface quality of the obtained product were examined. As a result, in the comparative example, although the maximum pressing load required for molding reached 350 tons, the web thickness of the product stopped at 5.0 mm, whereas that of this example. Was able to form the web thickness of the product to 4.6 mm, which is almost the same as the target value, under the maximum load of 240 tons, which is much lower than that of the comparative example. Further, the products of this example, like the comparative example, all have a sound surface quality without defects, and the method of the present invention has a dimensional accuracy equal to or higher than that of the conventional precision forging method. Moreover, it has been confirmed that the web-shaped product can be molded under a much lower pressure amount. Further, in the mold and the molding method of the present embodiment, the pressing device used as the pressing means is not a complicated and large-scale pressing device such as a double-acting pressing device, but an extremely general-purpose single-action pressing device. The purpose could be achieved with the press machine. On the other hand, the die can be mounted on the pressing device in the form of a die set, and the mounting and dismounting of the die were easy.
【００２７】以上に述べたように、プレスの圧下アンビ
ルの繰り返し圧下により、上金型の各スタンプ部を個別
かつ順次にブランクに圧入させて、複数のウエブとその
周囲のリブを逐次に成形する本実施例では、各加圧に要
する力量が小さくてすむので、比較的小さな力量のプレ
スでもって大型のウエブリブ形状品を成形することがで
きる。また、その加圧成形の過程において、逐次に成形
される各ウエブ上にスタンプ部が圧入されて存在するの
で、その周囲のリブ部におけるメタルフローを逆流させ
ることなく上方に向けて効果的に流すことができ、その
逆流に起因する引けや折れ込みなどの鍛造欠陥の発生を
防止することができる。As described above, by repeatedly pressing down the pressing anvil, the stamp parts of the upper mold are individually and sequentially pressed into the blank to form a plurality of webs and the ribs around them in sequence. In this embodiment, since the force required for each pressurization is small, it is possible to form a large-sized web-shaped product with a press having a relatively small force. Further, in the process of the pressure molding, since the stamp portion is press-fitted and present on each web that is sequentially molded, the metal flow in the rib portion around the stamp portion is effectively flowed upward without reverse flow. It is possible to prevent the occurrence of forging defects such as shrinkage and bending due to the backflow.
【００２８】なお、本実施例では、上金型の各スタンプ
部それぞれを、各１回の圧下によりブランクに圧入させ
て、目的とするウエブリブ形状品を成形するものとした
が、これは説明を簡明にするためであって、例えば、ウ
エブの周囲のリブの高さ寸法が比較的高く、かつ薄肉な
ウエブリブ形状品では、各スタンプ部のブランクに対す
る個別かつ順次な圧入を、各１回だけでなく、数次の圧
下の繰り返しにより、順次かつ周期的に行うことで最終
形状に成形することが望ましい。In this embodiment, each stamp portion of the upper die is pressed into the blank by pressing once to form the desired web-shaped product. For the sake of simplification, for example, in the case of a webb-shaped product in which the height of the ribs around the web is relatively high and the ribs are thin, individual and sequential press-fitting of each stamp portion into the blank is performed only once. Instead, it is desirable to form the final shape by repeating the rolling process several times and sequentially and periodically.
【００２９】〔図２〕は本発明の例の実施例の金型の概
要構成を示す断面図であって、 (a)図正断面図、 (b)図
は (a)図のＣ−Ｃ断面図である。なお、本実施例の金型
は、下金型の構成が異なる点以外は、〔図１〕に示した
金型と実質的に同じであり、ここでは、〔図１〕と等価
な各部に同符号を付して説明を省略し、その差異点のみ
を要約して説明する。FIG. 2 is a sectional view showing a schematic structure of a mold of an embodiment of the present invention, in which (a) is a front sectional view and (b) is a sectional view taken along line CC of FIG. FIG. The mold of this example is substantially the same as the mold shown in FIG. 1 except that the structure of the lower mold is different. Here, the parts equivalent to those shown in FIG. The same reference numerals are given and the description is omitted, and only the differences will be summarized and described.
【００３０】本実施例の金型では、段差圧下盤(6) が、
プレスの圧下アンビルＡの下端に取着された押盤(9) の
下面に水平方向に摺動可能に保持され、その側方の駆動
シリンダ(8) によって横方向に任意のピッチで移動でき
るものとされている。In the mold of this embodiment, the step reduction plate (6) is
Pressing of the press A device that is held slidably in the horizontal direction on the lower surface of the press plate (9) attached to the lower end of the anvil A, and can be moved laterally at an arbitrary pitch by the drive cylinder (8) on its side. It is said that.
【００３１】また、押盤(9) の両側には、(b) 図に示す
ように、下端を上金型(1) の本体部(2) に連結させた複
数の吊上桿(10)が上下方向に摺動可能に貫通して設けら
れてあり、圧下アンビルＡを加圧ストローク以上の高さ
に上昇させることで、この押盤(9) と吊上桿(10)を介し
て上金型(1) を上昇させて、下金型(4) 上を開放するも
のとされている。On both sides of the pusher plate (9), as shown in (b), a plurality of lifting rods (10) whose lower ends are connected to the main body (2) of the upper mold (1). Is provided so as to be slidable in the vertical direction, and by raising the pressing anvil A to a height higher than the pressurizing stroke, the pressing anvil A and the lifting rod (10) are used to lift it. It is said that the mold (1) is raised and the lower mold (4) is opened.
【００３２】一方、下金型(4) は、金型本体(11)と下補
助金型(12)とからなる組立形金型とされ、その金型本体
(11)にインプレッションを設けている。また、金型本体
(11)のインプレッションのリブの背部に対応する部位の
底壁には、横断面形状が目の字状とされ、リブ厚さと略
同幅を有する溝状の貫通孔(11a) が設けられると共に、
この貫通孔(11a) 内に、同様に横断面形状が目の字状と
された下パンチ(13)が上下方向に摺動可能に挿設されて
いる。On the other hand, the lower mold (4) is an assembled mold composed of a mold body (11) and a lower auxiliary mold (12).
Impressions are provided in (11). Also, the mold body
The bottom wall of the portion corresponding to the back of the impression rib of (11) is provided with a groove-shaped through hole (11a) having an eye-shaped cross-sectional shape and having a width substantially equal to the rib thickness. ,
In the through hole (11a), a lower punch (13) having a cross-shaped cross section is also inserted so as to be vertically slidable.
【００３３】また、この下金型(4) の金型本体(11)と下
補助金型(12)との間には、プレス装置が備えるノックア
ウトピンＮによって上下方向に駆動され、その上方の下
パンチ(13)を支持して上下動させる押上梁(14)が配設さ
れる一方、下補助金型(12)内には、押上梁(14)との連携
もとで下パンチ(13)を支持して上下動させる複数の押上
シリンダ(15)が配設されてある。Between the mold body (11) of the lower mold (4) and the lower auxiliary mold (12), a knockout pin N provided in the pressing device drives the vertical direction to move the upper part of the knockout pin N upward. A push-up beam (14) for supporting and lowering the lower punch (13) is arranged, while a lower punch (13) is provided in cooperation with the push-up beam (14) in the lower auxiliary mold (12). A plurality of push-up cylinders (15) for supporting and moving up and down are provided.
【００３４】また、上金型(1) と下金型(4) の金型本体
(11)の周囲には、ヒータ(16)が周設設されてあり、この
ヒータ(16)によって、成形中のブランクＢの温度を一定
の範囲内の温度に保持できるものとされている。Further, the mold bodies of the upper mold (1) and the lower mold (4)
A heater (16) is provided around the periphery of (11), and the heater (16) can keep the temperature of the blank B during molding within a certain range.
【００３５】上記構成の本実施例の金型では、上金型
(1) の各スタンプ部(3) の個別かつ順次な圧入によるブ
ランクＢの加圧成形過程において、下金型(4) の下パン
チ(13)を、その上面がインプレッション面より僅少に低
くなる高さ位置に支持・固定させて、リブの背部に位置
するインプレッション面に凹部を形成し、この凹部内に
ブランクＢの材料を流し込ませる。そして、全てのスタ
ンプ部(3) の圧下が終了した時点において、下金型(4)
の下パンチ(13)を、ノックアウトピンＮおよび押上シリ
ンダ(15)によって、その上面がインプレッション面と同
一面となる高さ位置まで押し上げ、これにより材料の上
方への流れで形成されるリブの背部に引けが生じること
を防止する。また、その加圧成形が終了した時点におい
て、ノックアウトピンＮを更に上昇させることで、押上
梁(14)を介して下パンチ(13)をインプレッション内に向
けて突出させ、これにより成形されたウエブリブ形状品
を浮き上がらせて取り出すのである。In the mold of this embodiment having the above structure, the upper mold
In the pressure forming process of the blank B by individually and sequentially press-fitting the stamp parts (3) in (1), the upper surface of the lower punch (13) of the lower mold (4) is slightly lower than the impression surface. By supporting and fixing at a height position, a recess is formed in the impression surface located at the back of the rib, and the material of the blank B is poured into this recess. Then, when the reduction of all stamp parts (3) is completed, the lower mold (4)
The lower punch (13) is pushed up by the knockout pin N and the push-up cylinder (15) to a height position where the upper surface thereof is flush with the impression surface, and the back of the rib formed by the upward flow of the material. To prevent shrinkage. Further, when the pressure molding is completed, by further raising the knockout pin N, the lower punch (13) is projected toward the inside of the impression via the push-up beam (14), and the webb thus formed. The shaped product is lifted and taken out.
【００３６】このように構成された本実施例の金型で
は、被成形材の下金型(4) 内への装脱が容易であり、し
かも、加圧成形中の被成形材の温度を一定の範囲内に保
持して材料の流動性を高く維持できると共に、リブの背
部に材料の引けが生じることを防げるので、得られる製
品の寸法精度をより高める一方で、その生産性の向上を
図ることができる。In the mold of this embodiment having such a structure, it is easy to load and unload the material to be molded into the lower mold (4), and moreover, the temperature of the material to be molded during pressure molding is kept constant. It can be maintained within the range of the above to maintain high fluidity of the material and prevent shrinkage of the material at the back of the rib, thus improving the dimensional accuracy of the obtained product while improving the productivity. be able to.
【００３７】なお、以上に述べた実施例の金型では、下
面に段差を設けた平板状の段差圧下盤を横方向に移動さ
せることで、上金型の各スタンプ部を個別かつ順次に圧
下するものとしたが、これは一例であって、例えば、そ
の別の実施態様の概念説明図である〔図３〕の (a)図に
示すように、段差圧下盤(6) をプレスの圧下アンビルＡ
に直接に取り付ける一方で、上下金型(1),(4) を水平方
向に移動可能に配置し、これらの相対的に横移動させる
ことで、上金型(1) の各スタンプ部(3) を個別かつ順次
に圧下させることができ、また、同 (b)図に示すよう
に、平板状の段差圧下盤の代わりに、下面の円周方向に
段差を設けた円盤状の段差圧下盤(36)を、各圧下ロッド
(5) の上方に配置し、この段差圧下盤(36)を回転動させ
ることで、上金型(1) の各スタンプ部(3) を個別かつ順
次に圧下させることもできる。In the molds of the above-described embodiments, the flat plate-shaped step-pressing plate having a step on the lower surface is moved in the lateral direction, so that the stamp parts of the upper mold are individually and sequentially pressed. However, this is an example, and for example, as shown in (a) of FIG. 3 which is a conceptual explanatory view of another embodiment, a step reduction plate (6) is pressed by a press. Anvil A
The upper and lower molds (1) and (4) are arranged so that they can be moved horizontally, and they are moved laterally relative to each other, so that the stamp parts (3 ) Can be individually and sequentially rolled down, and, as shown in the same figure (b), instead of a flat plate-shaped step reduction plate, a disc-shaped step reduction plate with a step in the circumferential direction on the lower surface is provided. (36) for each rolling rod
By arranging above the (5) and rotating this step reduction plate (36), it is possible to individually and sequentially press down each stamp part (3) of the upper mold (1).
【００３８】[0038]
【発明の効果】以上に述べたように、本発明に係る成形
方法および金型によれば、比較的小さな力量の極一般的
なプレス装置でもって大型のウエブリブ形状品を成形で
き、しかも鍛造欠陥の発生を抑えて高い寸法精度に成形
することができる。As described above, according to the molding method and the mold of the present invention, a large-sized web-shaped product can be molded with a very general press machine having a relatively small force, and a forging defect is also generated. It is possible to suppress the occurrence of cracks and mold with high dimensional accuracy.
【図１】本発明の実施例のウエブリブ形状品の成形方法
の概要説明図であって、 (a)図は成形初期段階の状態を
示す断面図、 (b)図は成形中間段階の状態を示す断面
図、 (c)図は成形終了段階の状態を示す断面図、 (d)図
は成形後のウエブリブ形状品の一部を切り欠いて示す斜
視図である。1A and 1B are schematic explanatory views of a method for molding a web-shaped product according to an embodiment of the present invention, in which FIG. 1A is a sectional view showing a state at an initial stage of molding, and FIG. 1B is a state at an intermediate stage of molding. The cross-sectional view shown in the figure, (c) is a cross-sectional view showing the state at the final stage of molding, and (d) is a perspective view showing a notched part of the web-shaped article after molding.
【図２】本発明の例の実施例の金型の概要構成を示す断
面図であって、 (a)図正断面図、 (b)図は (a)図のＣ−
Ｃ断面図である。2A and 2B are cross-sectional views showing a schematic configuration of a mold of an example of the present invention, in which FIG. 2A is a front sectional view, and FIG.
It is a C sectional view.
【図３】本発明の金型の別の実施態様の概念説明図であ
る。FIG. 3 is a conceptual explanatory view of another embodiment of the mold of the present invention.
【図４】従来の精密型鍛造法の概要説明断面図である。FIG. 4 is a schematic explanatory sectional view of a conventional precision die forging method.
【図５】従来の逐次鍛造法の概要説明断面図である。FIG. 5 is a schematic cross-sectional view of a conventional sequential forging method.
(1) --上金型 (2) --本体部 (2a)--凹部 (3) --スタンプ部 (3a)--先端部 (4) --下金型 (5) --圧下ロッド (6) --段差圧下盤 (7) --バネシリンダ (8) --駆動シリンダ Ａ -- 圧下アンビル Ｂ -- ブランク Ｍ -- ウエブリブ形状品 Ｒ -- リブ Ｗ -- ウエブ (1) --Upper mold (2) --Main body (2a) --Recess (3) --Stamp (3a) --Tip (4) --Lower mold (5) --Pressing rod (6) --Step reduction plate (7) --Spring cylinder (8) --Drive cylinder A --Pressing anvil B --Blank M --Webb shape product R --Rib W --Web
───────────────────────────────────────────────────── フロントページの続き (72)発明者 栄 輝 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所神戸総合技術研究所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Sakae 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Pref., Kobe Steel Institute of Kobe Steel, Ltd.
Claims (2)
るウエブリブ形状品をプレス型鍛造するに際して、各ウ
エブ部を成形する金型のスタンプ部を、金型内に配置さ
れたブランクに個別かつ順次に圧入させてゆき、各ウエ
ブおよびその周囲のリブを逐次に成形することを特徴と
するウエブリブ形状品の成形方法。1. When stamping a web-shaped product having a plurality of webs surrounded by ribs by press die forging, a stamp portion of a die for forming each web portion is formed into a blank arranged in the die. A method for molding a web-shaped product, which comprises press-fitting the webs and the ribs around the webs individually and sequentially.
るウエブリブ形状品を成形するインプレッションを備え
た上下金型であって、上金型が、上金型本体内に各ウエ
ブ部を成形する複数のスタンプ部を個別に上下動可能に
有すると共に、上金型本体の上部に各スタンプ部それぞ
れに連結させた圧下ロッドを貫通せしめて有し、それら
圧下ロッドの上部に段差圧下盤を備えてなることを特徴
とするウエブリブ形状品の成形金型。2. An upper and lower molds having an impression for molding a web-shaped product having a plurality of webs surrounded by ribs, wherein the upper mold has each web portion in the upper mold body. A plurality of stamp parts to be molded are individually movable up and down, and a pressing rod connected to each stamp part is penetrated at the upper part of the upper mold body, and a step pressing platen is provided at the upper part of these pressing rods. A molding die for a web-shaped product, which is characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4096695A JP2818070B2 (en) | 1992-04-16 | 1992-04-16 | Molding method and mold for web-shaped product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4096695A JP2818070B2 (en) | 1992-04-16 | 1992-04-16 | Molding method and mold for web-shaped product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05293581A true JPH05293581A (en) | 1993-11-09 |
| JP2818070B2 JP2818070B2 (en) | 1998-10-30 |
Family
ID=14171912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4096695A Expired - Lifetime JP2818070B2 (en) | 1992-04-16 | 1992-04-16 | Molding method and mold for web-shaped product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2818070B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010172919A (en) * | 2009-01-28 | 2010-08-12 | Toyota Central R&D Labs Inc | Forging apparatus |
| JP2013501629A (en) * | 2009-08-13 | 2013-01-17 | ザ・ボーイング・カンパニー | Sequential forging |
| CN103302220A (en) * | 2013-07-03 | 2013-09-18 | 上海工程技术大学 | One-step forging forming device and method of automobile hubs |
| CN109894563A (en) * | 2019-03-29 | 2019-06-18 | 北京航星机器制造有限公司 | A kind of large-scale latticed high muscle thin plate monolithic molding mold of step-by-step movement and method |
| CN111804858A (en) * | 2020-06-01 | 2020-10-23 | 北京科技大学 | Mold and method for realizing continuous local loading forming of large-scale rib plate |
| CN114535385A (en) * | 2022-03-01 | 2022-05-27 | 燕山大学 | Punch forming equipment and process for thin-wall inner web rib plate |
| CN115379909A (en) * | 2020-04-17 | 2022-11-22 | 奥贝尔和杜瓦尔公司 | Method for manufacturing integrated aircraft door by die cutting and machining |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570414B (en) * | 2018-11-22 | 2021-03-23 | 淮南矿业(集团)有限责任公司 | Branch fork rib part forming process and branch fork rib part manufactured by branch fork rib part forming process |
-
1992
- 1992-04-16 JP JP4096695A patent/JP2818070B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010172919A (en) * | 2009-01-28 | 2010-08-12 | Toyota Central R&D Labs Inc | Forging apparatus |
| JP2013501629A (en) * | 2009-08-13 | 2013-01-17 | ザ・ボーイング・カンパニー | Sequential forging |
| CN103302220A (en) * | 2013-07-03 | 2013-09-18 | 上海工程技术大学 | One-step forging forming device and method of automobile hubs |
| CN109894563A (en) * | 2019-03-29 | 2019-06-18 | 北京航星机器制造有限公司 | A kind of large-scale latticed high muscle thin plate monolithic molding mold of step-by-step movement and method |
| CN109894563B (en) * | 2019-03-29 | 2020-12-08 | 北京航星机器制造有限公司 | Integral forming die and method for large stepping latticed high-rib thin plate |
| CN115379909A (en) * | 2020-04-17 | 2022-11-22 | 奥贝尔和杜瓦尔公司 | Method for manufacturing integrated aircraft door by die cutting and machining |
| CN111804858A (en) * | 2020-06-01 | 2020-10-23 | 北京科技大学 | Mold and method for realizing continuous local loading forming of large-scale rib plate |
| CN114535385A (en) * | 2022-03-01 | 2022-05-27 | 燕山大学 | Punch forming equipment and process for thin-wall inner web rib plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2818070B2 (en) | 1998-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110883122B (en) | Short-process large-deformation blank making method for large-size large-height-diameter-ratio magnesium alloy cast rod | |
| US6986273B2 (en) | Apparatus and method for opening and closing stacked hydroforming dies | |
| JP5812312B1 (en) | Press molding method, press product manufacturing method, and press molding apparatus | |
| CN110586829A (en) | Multidirectional die forging hydraulic press with novel structure | |
| CN109530605A (en) | A kind of large size crank throw forging apparatus and forging method | |
| JPH05293581A (en) | Forming method and die of web-rib shape part | |
| CN107497984B (en) | An a kind of upsetting formation mold of the big specification slab of larger ratio of height to diameter | |
| CN106583535B (en) | A kind of ellipse punching die | |
| JP3610712B2 (en) | Variable section extrusion molding equipment | |
| JP2006187793A (en) | Powder molding device | |
| CN206509392U (en) | Oval punching die | |
| CN103100570B (en) | Openable crank extrusion device and forming method of large marine crankshaft crank | |
| CN107552700A (en) | An a kind of upsetting formation method of the big specification strand of larger ratio of height to diameter | |
| CN110561788B (en) | Long purlin forming device of combined material cap type | |
| JP4232451B2 (en) | Press working method with excellent shape freezing | |
| CN210280534U (en) | Asymmetric section steel rail upsetting device | |
| JPH0647200B2 (en) | Method and device for removing cracks of molded product in powder molding press | |
| CN220259449U (en) | High-temperature forging die | |
| CN220760898U (en) | Take neck butt weld flange forging equipment | |
| CN220278002U (en) | Stamping mechanism | |
| CN216027508U (en) | Two-side simultaneous ribbing die for closed-section automobile structural part | |
| CN219190982U (en) | Hydraulic forming machine for processing precise rubber and plastic products | |
| JP4394257B2 (en) | Method for producing powder compact | |
| CN216461503U (en) | Wheel hub flange mould | |
| CN110695155B (en) | Crank bend forging forming device and crank bend forging forming method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980728 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070821 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080821 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080821 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090821 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090821 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100821 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110821 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110821 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120821 Year of fee payment: 14 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120821 Year of fee payment: 14 |