JP3044513B2 - Forging equipment - Google Patents
Forging equipmentInfo
- Publication number
- JP3044513B2 JP3044513B2 JP5121736A JP12173693A JP3044513B2 JP 3044513 B2 JP3044513 B2 JP 3044513B2 JP 5121736 A JP5121736 A JP 5121736A JP 12173693 A JP12173693 A JP 12173693A JP 3044513 B2 JP3044513 B2 JP 3044513B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- forging
- pressure
- mold
- hydraulic chamber
- 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.)
- Expired - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、アルミニューム合金や
マグネシウム合金等のように、塑性加工性に富む材質か
ら一体に形成されるホイールの成型等に使用する鍛造成
型装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging apparatus used for forming a wheel integrally formed of a material having high plastic workability, such as an aluminum alloy or a magnesium alloy.
【０００２】[0002]
【従来技術及び課題】自動車用ホイールは、ディスク部
(1) の外周に外リム部(22)、ドロップセンタ部(23)及び
内リム部(24)からなるリム(2) が一体に連設される（図
１参照）。軽合金ホイールの場合、軽合金製のブロック
状素材又は円盤状素材に形成された被加工材が一旦ディ
スク部とこの外周に連続するリム部からなる皿状体に成
型され、このリム部がロール成型によって前記各部から
なる最終形状のリム部断面に成型される。2. Description of the Related Art A wheel for a motor vehicle has a disk portion.
A rim (2) including an outer rim portion (22), a drop center portion (23) and an inner rim portion (24) is integrally and continuously provided on the outer periphery of (1) (see FIG. 1). In the case of a light alloy wheel, a workpiece formed of a light alloy block-shaped material or a disk-shaped material is once formed into a dish-like body comprising a disk portion and a rim portion continuous to the outer periphery, and the rim portion is rolled. By molding, it is molded into a rim section cross section of the final shape composed of the respective parts.
【０００３】例えば、特公平3-2574号に開示される従来
の方法では、リム部以外の部分を最終形状に仕上げた皿
状体を複数の鍛造工程によって製作し、この後、この鍛
造後のリム部をロール成形によって最終形状に仕上げて
いる。このような従来の製造方法では、前記皿状体の成
型に際して複数の鍛造工程が必要となると共に、各鍛造
工程毎に別個の金型を用意する必要がある。[0003] For example, in the conventional method disclosed in Japanese Patent Publication No. 3-2574, a dish-shaped body in which portions other than the rim portion are finished to a final shape is manufactured by a plurality of forging steps, and thereafter, after this forging, The rim is finished to the final shape by roll forming. In such a conventional manufacturing method, a plurality of forging steps are required for molding the dish-shaped body, and it is necessary to prepare a separate die for each forging step.
【０００４】そこで、この鍛造工程を簡素化する為に前
記皿状体の成型工程を一つの装置で行えるようにする方
法として、特願平4-339164号を提案した。この方法は、
相互に対向し且つ同方向に回転する一対の金型(301)(30
2)によって被加工材(10)を加圧してディスク部を鍛造成
型し、前記加圧に伴って前記金型の周縁境界部から突出
する素材突出部を、裂開ロール(401) を用いて裂開する
ことにより皿状体に成型する方法（図２〜図４参照）で
ある。In order to simplify the forging process, Japanese Patent Application No. 4-339164 proposes a method for performing the molding process of the dish-shaped body with one apparatus. This method
A pair of dies (301) (30) facing each other and rotating in the same direction
By pressing the workpiece (10) by 2), the disc portion is forged, and the material projecting portion projecting from the peripheral boundary of the mold with the pressurization is formed by using a tearing roll (401). This is a method of forming a dish-like body by tearing (see FIGS. 2 to 4).
【０００５】この方法では、ディスク部の鍛造成型と同
時に、このディスク部の外周にはリム部(20)が成型され
る。ところが、前記ディスク部の成型に於いてはこの部
分の加工度合いが極端に大きいことから、被加工材(10)
を金型(301)(302)によって加圧成形するに要する圧力も
極端に大きいものとなる。したがって、固定部により金
型(301)(302)を自転自在に支持した状態で対向方向に加
圧した場合、この回転支持部に大きな加圧力が作用する
ことから、この回転支持部にころがり軸受けを採用した
場合には、これが損傷しやすく、自動車用ホイールの鍛
造成形装置には採用し得ない。In this method, a rim (20) is formed on the outer periphery of the disk at the same time as the forging of the disk. However, in the molding of the disk portion, since the degree of processing of this portion is extremely large, the workpiece (10)
The pressure required for press-molding this with the molds (301) and (302) is extremely large. Therefore, when the molds (301) and (302) are rotatably supported by the fixing portion and pressurized in the opposite direction, a large pressing force acts on the rotation supporting portion, so that the rolling bearing is applied to the rotation supporting portion. When this is adopted, it is easily damaged, and cannot be adopted in a forging apparatus for an automobile wheel.
【０００６】本発明は、かかる点に鑑みてなされたもの
であり、『塑性加工可能な素材からなる被加工材を同方
向に同期回転する一対の金型によって加圧することによ
り前記金型の対向端面に倣った形状のディスク部を鍛造
成型する鍛造成型装置』において、加圧成形に要する推
力が大きい場合であっても、金型の回転支持部が円滑に
作動すると共に、この支持部の耐久性が確保されるよう
にすることをその課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances. In a forging device that forges a disk shaped according to the end surface, even if the thrust required for pressure forming is large, the rotation support of the mold operates smoothly and the durability of this support The task is to ensure the performance.
【０００７】[0007]
【技術的手段】上記課題を解決するための本発明の技術
的手段は、『一対の金型(301)(302)のそれぞれは、ホル
ダにより極わずかの軸線方向の移動余裕を有するように
回転自在に支持されたロータの突出端面に取り付けら
れ、前記ホルダの一方を油圧力によって軸線方向に推進
後退させる構成とすると共に、前記ホルダには前記ロー
タの内側端面(IF)との間に油圧室(9) を形成し、この油
圧室(9) の底壁(93)と前記内側端面(IF)との間の一部に
環状の摺動間隙(SG)を形成し、この摺動間隙(SG)を介し
て前記油圧室(9) とリーク回路とを連通させ、前記油圧
室(9) から内側端面(IF)に作用する圧力の総和と上記金
型推進力となる油圧力とを一致させた』ことである。The technical means of the present invention for solving the above-mentioned problem is as follows: "Each of the pair of molds (301) and (302) is rotated by a holder so as to have a very small axial movement allowance. At least one of the holders is axially propelled and retracted by hydraulic pressure attached to a protruding end surface of a freely supported rotor, and a hydraulic chamber is provided between the holder and an inner end surface (IF) of the rotor. (9), an annular sliding gap (SG) is formed in a part between the bottom wall (93) of the hydraulic chamber (9) and the inner end face (IF), and the sliding gap (SG) is formed. SG) through the hydraulic chamber (9) and the leak circuit, and the sum of the pressure acting on the inner end face (IF) from the hydraulic chamber (9) matches the hydraulic pressure serving as the mold propulsion force. Let's do it. "
【０００８】[0008]
【作用】上記技術的手段は次のように作用する。被加工
材は、同方向に同期回転駆動される一対の金型(301)(30
2)間に介在され、これらの金型の対向接近方向の推力に
よって加圧されて、ディスク部に鍛造成形される。この
とき、ホルダに作用する油圧推力によってこのホルダに
取り付けられた前記金型(301)(302)相互が対向接近され
ることとなり、ホルダとロータの内側端面(IF)との間で
は、前記被加工材の加圧成形力の反力が軸線方向の加圧
力として作用する。したがって、前記内側端面(IF)が対
向壁面（底壁(93)）に加圧されることとなる。ところ
が、この部分は油圧室(9) となっており、この油圧室か
らの圧力が前記内側端面(IF)に作用する。この油圧室
(9) からホルダに作用する圧力の総和は上記金型推進力
に一致させているから、油圧室(9) とホルダの内側端面
(IF)との間には、所定の摺動間隙(SG)が存在する態様で
ホルダが回転されることとなる。The above technical means operates as follows. The workpiece is a pair of dies (301) (30) synchronously driven in the same direction.
2) It is interposed between them and pressurized by the thrust in the direction of approaching and approaching these dies, and is forged into a disk portion. At this time, the molds (301) and (302) attached to the holder come close to each other due to the hydraulic thrust acting on the holder, and between the holder and the inner end face (IF) of the rotor, the above-mentioned cover is formed. The reaction force of the pressing force of the work material acts as a pressing force in the axial direction. Therefore, the inner end surface (IF) is pressed against the opposing wall surface (bottom wall (93)). However, this part is a hydraulic chamber (9), and the pressure from this hydraulic chamber acts on the inner end surface (IF). This hydraulic chamber
Since the sum of the pressures acting on the holder from (9) matches the above-mentioned mold propulsion force, the hydraulic chamber (9) and the inner end face of the holder
(IF), the holder is rotated in such a manner that a predetermined sliding gap (SG) exists.
【０００９】加工過程において金型推進力が過大になり
ホルダの内側端面(IF)が油圧室(9)の対向壁面に圧接さ
れる傾向となると、前記摺動間隙(SG)が縮小する傾向と
なり、その分リーク回路へのリーク量が減少するから、
油圧室(9) から前記内側端面(IF)に作用する油圧力が大
きくなって、この油圧力と金型推進力とがバランスす
る。In the machining process, when the mold propulsion force becomes excessive and the inner end face (IF) of the holder tends to be pressed against the opposing wall surface of the hydraulic chamber (9), the sliding gap (SG) tends to decrease. , Since the amount of leak to the leak circuit decreases by that amount,
The hydraulic pressure acting on the inner end face (IF) from the hydraulic chamber (9) increases, and this hydraulic pressure balances the mold propulsion force.
【００１０】このように、金型(301)(302)による軸線方
向の加工圧力が極端に大きな条件であっても金型を装着
したロータ保持部に作用する前記加工圧力の反力が、金
型推進力に一致する油圧力によって負担された態様でこ
れら金型保持部となるロータが回転自在に保持される。As described above, even if the processing pressure in the axial direction by the dies (301) and (302) is extremely large, the reaction force of the processing pressure acting on the rotor holding portion on which the dies are mounted is small. The rotors serving as the mold holding portions are rotatably held in a mode in which the rotor is held by the oil pressure corresponding to the mold propulsion force.
【００１１】[0011]
【効果】ホルダのロータ保持部に作用する加工圧力の反
作用力は油圧室(9) からの油圧力によって負担されるか
ら、一対の金型(301)(302)による加工圧力が極端に大き
な場合であっても、これら金型(301)(302)の同期回転の
円滑さが長期にわたって安定することとなる。また、ロ
ータ保持部の耐久性が確保されたものとなる。[Effect] Since the reaction force of the working pressure acting on the rotor holding portion of the holder is borne by the hydraulic pressure from the hydraulic chamber (9), when the working pressure by the pair of dies (301) and (302) is extremely large. Even so, the smoothness of the synchronous rotation of the dies (301) and (302) is stabilized for a long period of time. Further, the durability of the rotor holding portion is ensured.
【００１２】[0012]
【実施例】次に、上記した本発明の実施例を図面に従っ
て詳述する。図５及び図６に示す第１実施例の装置は、
被加工材(10)からディスク部(1) とリム(2) とが一体と
なった図１に示すような自動車用のホイールを製造する
装置である。Next, an embodiment of the present invention will be described in detail with reference to the drawings. The device of the first embodiment shown in FIGS.
This is an apparatus for manufacturing an automobile wheel as shown in FIG. 1 in which a disk portion (1) and a rim (2) are integrated from a workpiece (10).
【００１３】このため、図５に示すように、一定位置で
回転駆動される下方の金型(302) と、回転駆動状態で昇
降駆動される上方の金型(301) とが対向配置され、これ
ら金型の外周に、裂開ローラ(401) と、リム断面成型用
の成型ローラ(40)とが移動可能に配設されている。前記
下方の金型(302) は、固定ベッド(61)によって支持され
る下方のホルダ(65)によって回転自在に支持されたロー
タ(5b)の上面に取付けられており、その上面はディスク
部(1) の内面形状に一致した第２加圧面(33)となり、こ
の金型の胴部の断面形状は、上記したドロップセンタ(2
3)の一部から内リム(24)の内周面及び外側面までの断面
形状に一致するように設定されている。For this reason, as shown in FIG. 5, a lower mold (302), which is driven to rotate at a fixed position, and an upper mold (301), which is driven to move up and down in a rotationally driven state, are arranged facing each other. A tearing roller (401) and a forming roller (40) for forming a rim cross section are movably disposed on the outer periphery of these molds. The lower mold (302) is attached to the upper surface of a rotor (5b) rotatably supported by a lower holder (65) supported by a fixed bed (61), and the upper surface is a disk portion ( The second pressing surface (33) conforms to the inner surface shape of (1), and the cross-sectional shape of the body of this mold is the same as the drop center (2) described above.
The cross-sectional shape from a part of 3) to the inner peripheral surface and the outer peripheral surface of the inner rim (24) is set.
【００１４】上方の金型(301) はホルダ(54)によって回
転自在に保持されたロータ(5a)の下面に取付けられてお
り、その下面は第１加圧面(31)となっており、ディスク
部(1) の外面の表面形状と同様に成形されている。ディ
スク部(1) の外面には凹凸模様部が形成されるから、こ
の第１加圧面(31)は前記凹凸模様部と一致した凹凸模様
成型部となっている。また、この第１加圧面(31)の外周
に連続する胴部は、ドロップセンタ(23)の一部から外リ
ム(22)の内周面及びこれに続く外側面までと適合させた
断面形状となっている。The upper mold (301) is attached to the lower surface of a rotor (5a) rotatably held by a holder (54), the lower surface of which serves as a first pressing surface (31), It is formed in the same shape as the outer surface of the portion (1). Since an uneven pattern portion is formed on the outer surface of the disk portion (1), the first pressing surface (31) is an uneven pattern molded portion that matches the uneven pattern portion. Further, the body part continuous with the outer periphery of the first pressing surface (31) has a cross-sectional shape adapted from a part of the drop center (23) to the inner peripheral surface of the outer rim (22) and the outer surface following the outer rim (22). It has become.
【００１５】そして、この金型(301) が下方の金型(30
2) の軸線と同軸上で対向方向に加圧される。このた
め、前記ホルダ(54)はフレーム(50)の上端のデッキ(51)
に設けた油圧駆動装置(52)の出力軸に連設されて昇降駆
動される。上記した一対の金型(301)(302)を回転駆動す
る為、駆動モータ(15)と歯車伝動する出力軸(16)がこれ
ら金型の回転軸線と平行に配設される。そして、この出
力軸に装備させた昇降自在の第１駆動歯車(17)が、上方
のロータ(5a)に取付けた第１従動歯車(501) とかみ合
い、前記出力軸(16)に固定した下方の第２駆動歯車(18)
が下方のロータ(5b)に取付けた第２従動歯車(502) とか
み合う構成となっている。Then, the mold (301) is moved to the lower mold (30).
2) Coaxial pressure is applied in the opposite direction on the axis. For this reason, the holder (54) is provided at the upper deck (51) of the frame (50).
Is connected to the output shaft of the hydraulic drive device (52) provided in the, and is driven up and down. In order to rotationally drive the pair of molds (301) and (302), a drive motor (15) and an output shaft (16) for gear transmission are arranged in parallel with the rotational axes of these molds. A vertically movable first drive gear (17) mounted on the output shaft meshes with a first driven gear (501) mounted on an upper rotor (5a), and a lower driven gear fixed on the output shaft (16). Second drive gear (18)
Are engaged with the second driven gear (502) attached to the lower rotor (5b).
【００１６】前記第１駆動歯車(17)は出力軸(16)に対し
てスプライン嵌合しており、第１駆動歯車(17)は出力軸
(16)に対して軸線方向に移動自在で且つこれと一体回転
する伝動関係にある。又、この第１駆動歯車(17)のボス
はホルダ(54)に設けたブラケット(53)とまわり対偶す
る。従って、前記第１駆動歯車(17)は前記ブラケット(5
3)により回転自在に保持されてこれと一体的に昇降す
る。つまり、第１従動歯車(501) と一体的に昇降するこ
ととなる。The first drive gear (17) is spline-fitted to the output shaft (16), and the first drive gear (17) is
(16) is in a transmission relationship in which it is movable in the axial direction and rotates integrally therewith. The boss of the first drive gear (17) is in opposition with the bracket (53) provided on the holder (54). Therefore, the first drive gear (17) is connected to the bracket (5
It is held rotatably by 3) and moves up and down integrally with it. In other words, it moves up and down integrally with the first driven gear (501).
【００１７】上記金型(302) と金型(301) との境界部の
側方には、同図及び図６に示すように、支持部(41)によ
って支持された上記裂開ローラ(401) と、支持部(42)に
よって支持された成型ローラ(40)とが配設されている
が、これら支持部は制御信号入力に応じて、金型(301)
(302)の半径方向と上下方向の両方に各ローラを移動さ
せるものであり、特に、成型ローラ(40)の支持部(42)
は、前記二方向の移動に加えてこの成型ローラの姿勢を
変えるべく首振方向の移動も可能になっている。なお、
これら各支持部は、油圧駆動によって制御される構成で
ある。As shown in FIG. 6 and FIG. 6, on the side of the boundary between the mold (302) and the mold (301), the tear roller (401) supported by a support (41) is provided. ) And a forming roller (40) supported by a support portion (42), and these support portions are in response to a control signal input, and a mold (301) is provided.
(302) to move each roller in both the radial direction and the vertical direction, particularly, the supporting portion (42) of the forming roller (40)
In addition to the movement in the two directions, the movement in the swing direction is also possible to change the posture of the molding roller. In addition,
Each of these supports is configured to be controlled by hydraulic drive.
【００１８】次に、上記装置を用いて被加工材(10)から
最終形状のホイールを製作する方法の実際について説明
する。この実施例の方法では、既に説明した特願平4-33
9164号の方法と同様に、金型(301)(302)の間に円柱状の
被加工材(10)が挿入され（図２参照）、次いで、駆動モ
ータ(15)によって金型(301)(302)が回転駆動された状態
で上方の金型(301) が油圧駆動装置(52)の出力によって
降下駆動され、前記被加工材(10)が金型(301)(302)によ
って加圧される。加圧が進行するにしたがって、被加工
材(10)は第１加圧面(31)および第２加圧面(33)に倣った
形状に成型される鍛造工程が進行すると共に、この加圧
に伴う展延によって余剰素材が、金型(301)(302)の境界
部からはみ出す。Next, a method of manufacturing a wheel having a final shape from the workpiece 10 using the above-described apparatus will be described. According to the method of this embodiment, the method described in Japanese Patent Application No.
Similarly to the method of No. 9164, a columnar workpiece (10) is inserted between the molds (301) and (302) (see FIG. 2), and then the mold (301) is driven by the drive motor (15). The upper mold (301) is driven downward by the output of the hydraulic drive device (52) while the (302) is rotationally driven, and the workpiece (10) is pressed by the molds (301) and (302). Is done. As the pressurization proceeds, the forging process in which the workpiece (10) is molded into a shape following the first pressurized surface (31) and the second pressurized surface (33) progresses, The surplus material protrudes from the boundary between the molds (301) and (302) due to the spreading.
【００１９】このとき、又は、これに先立って、裂開ロ
ーラ(401) が前記余剰素材のはみ出し部に対して所定の
位置に進出される。金型(301)(302)が回転駆動状態にあ
ることから、前記余剰素材のはみ出し部と裂開ローラ(4
01) が相対回転することとなり、この裂開ローラ(401)
の移動軌跡に応じた形に裂開されてリム部(20)が形成さ
れる（図３，図４参照）。尚、この裂開ローラ(401) の
支持部は油圧駆動装置によって所定の経路で駆動される
ように制御されるものであるから、この駆動経路を設定
することにより裂開後のリム部(20)の形状を決定でき
る。At this time or prior to this, the tearing roller (401) is advanced to a predetermined position with respect to the protruding portion of the surplus material. Since the molds (301) and (302) are in a rotationally driven state, the protruding portion of the excess material and the tearing roller (4)
01) will rotate relative to each other, and this tearing roller (401)
The rim portion (20) is formed by splitting in a shape corresponding to the movement trajectory (see FIGS. 3 and 4). Since the support of the tearing roller (401) is controlled by a hydraulic drive so as to be driven along a predetermined path, by setting this drive path, the rim (20) after the tearing is established. ) Shape can be determined.
【００２０】これまでの工程では、金型(301) は回転状
態に維持されたままで降下駆動することとなるが、既述
のように、共通の駆動モータ(15)と歯車伝動機構からな
る共通の駆動装置によって回転駆動された状態で降下移
動するから、金型(302) との同期回転が確保されたもの
となる。従って、金型(301)(302)によるディスク部(1)
の鍛造成型部に於いて、第１・第２加圧面(31)(33)の相
対的なズレが防止されて、ディスク部(1) の仕上がり精
度が向上する。In the steps so far, the mold (301) is driven to descend while being kept in a rotating state. However, as described above, the common drive motor (15) and the common gear transmission mechanism are used. Is moved downward while being rotated and driven by the driving device of (1), synchronous rotation with the mold (302) is ensured. Therefore, the disk part (1) by the mold (301) (302)
In the forged part, relative displacement between the first and second pressing surfaces (31) and (33) is prevented, and the finishing accuracy of the disk part (1) is improved.
【００２１】この後、油圧駆動装置(52)による金型(30
1) の降下駆動が停止され、駆動モータ(15)による金型
(301)(302)の回転が維持されたままで、成型ローラ(40)
が、その支持部(42)によって前記リム部(20)に対接さ
れ、この成型ローラ(40)の移動軌跡及びその時の傾斜姿
勢を金型(301)(302)の胴部の形状に合わせて制御するこ
とにより、図７のように、リム(2) が成型される。Thereafter, the mold (30) is driven by the hydraulic drive (52).
1) Descent drive is stopped and the mold by the drive motor (15)
(301) While the rotation of (302) is maintained, the forming roller (40)
Is supported by the support portion (42) against the rim portion (20), and the movement trajectory of the molding roller (40) and the inclination posture at that time are adjusted to the shape of the body of the molds (301) and (302). As a result, the rim (2) is formed as shown in FIG.
【００２２】この後、駆動モータ(15)による回転が停止
されて、金型(301) が上昇復帰された状態とし、この状
態で製品が採り出される。 ［ロータ(5a)(5b)支持構造］上記鍛造成型の際、油圧に
よって金型(301) が昇降駆動されて鍛造圧力が金型(30
1)(302)に作用する。そして、この鍛造圧力の反作用力
がロータ(5a)(5b)の回転支持部に作用する。この鍛造圧
力は極端に大きな値となることから、通常の転がり軸受
構造のみでは前記鍛造圧力を負担し得ない。Thereafter, the rotation by the drive motor (15) is stopped, and the mold (301) is brought up and returned, and the product is taken out in this state. [Rotor (5a) (5b) support structure] In the above forging, the die (301) is driven up and down by hydraulic pressure to raise the forging pressure to the die (30).
1) Acts on (302). Then, the reaction force of the forging pressure acts on the rotation supporting portions of the rotors (5a) (5b). Since the forging pressure has an extremely large value, the forging pressure cannot be borne by only a normal rolling bearing structure.
【００２３】そこで、この実施例では、油圧によって前
記反作用力を負担する構成を採用する。この構成につい
て以下に詳述する。鍛造圧力の反作用力を負担するた
め、ロータ(5a)の上面とホルダ(54)との間と、ロータ(5
b)とホルダ(65)との間に油圧室(9)(9)をそれぞれ形成す
る。これら油圧室(9)(9)の構成は同様であり、以下では
その一方の油圧室(9) について詳述する。Therefore, in this embodiment, a configuration is adopted in which the above reaction force is borne by hydraulic pressure. This configuration will be described in detail below. In order to bear the reaction force of the forging pressure, between the upper surface of the rotor (5a) and the holder (54), the rotor (5
Hydraulic chambers (9) and (9) are formed between b) and the holder (65). The configurations of the hydraulic chambers (9) and (9) are similar, and one hydraulic chamber (9) will be described in detail below.
【００２４】ロータ(5a)はホルダ(54)の下方に開放する
凹陥部に収容されて、この凹陥部の周壁とロータ(5a)の
胴部との間には一対の転がり軸受(91)(91)が介装されて
いる。ロータ(5a)の上面（既述の内側端面(IF)に相当す
る）には凹陥部が形成されていることから、前記上面の
周縁には環状凸部(92)が形成されることとなり、この環
状凸部(92)の頂面と前記ホルダ(54)の凹陥部の上底(93
a) とが摺動自在に対接する。従って、この上底(93a)
と前記環状凸部(92)の頂面との間にはごく僅かの摺動間
隙(SG)がある。そして、前記油圧室(9) には、油圧回路
(95)が接続されている。この油圧回路は、ホルダ（54）
を昇降駆動する油圧駆動装置(52)への油圧源(P) に接続
されており、油圧室(9) からロータ(5a)に作用する圧力
と前記油圧駆動装置(52)による降下駆動圧力とを一致さ
せている。このため、ロータ(5a)における油圧室(9) 側
の受圧面積が、上記油圧駆動装置(52)の降下駆動圧力と
の関係で所定の値に設定されている。The rotor (5a) is accommodated in a recess opening below the holder (54), and a pair of rolling bearings (91) (91) is provided between the peripheral wall of the recess and the body of the rotor (5a). 91) is interposed. Since a concave portion is formed on the upper surface of the rotor (5a) (corresponding to the inner end surface (IF) described above), an annular convex portion (92) is formed on the periphery of the upper surface, The top surface of this annular convex portion (92) and the upper bottom (93) of the concave portion of the holder (54)
a) and slidably contact each other. Therefore, this upper bottom (93a)
There is a very small sliding gap (SG) between and the top surface of the annular projection (92). A hydraulic circuit is provided in the hydraulic chamber (9).
(95) is connected. This hydraulic circuit has a holder (54)
Is connected to a hydraulic source (P) to a hydraulic drive (52) for raising and lowering the pressure, and the pressure acting on the rotor (5a) from the hydraulic chamber (9) and the descent drive pressure by the hydraulic drive (52) are Are matched. For this reason, the pressure receiving area of the rotor (5a) on the hydraulic chamber (9) side is set to a predetermined value in relation to the descent drive pressure of the hydraulic drive device (52).
【００２５】又、ホルダ(54)の胴部には、転がり軸受(9
1)(91)の間に環状溝部(94)が形成されており、この環状
溝部(94)がリーク回路(96)を介して油圧駆動装置(52)か
らのリーク回路に接続されている。したがって、環状凸
部(92)とホルダ(54)の凹陥部の上記上底(93a) との摺動
間隙を介してリークする圧力伝達油は上方の転がり軸受
(91)を介して前記リーク回路(96)にリークする。A rolling bearing (9) is provided on the body of the holder (54).
An annular groove (94) is formed between (1) and (91), and this annular groove (94) is connected to a leak circuit from the hydraulic drive device (52) via a leak circuit (96). Accordingly, the pressure transmitting oil leaking through the sliding gap between the annular convex portion (92) and the upper bottom (93a) of the recessed portion of the holder (54) is prevented from being transmitted to the upper rolling bearing.
A leak is made to the leak circuit (96) via (91).
【００２６】下方のロータ(5b)側にも上記と同様の転が
り軸受け構造、環状凸部(92)及びホルダ(65)の凹陥部の
下底(93b) によって囲まれる油圧室(9) 、この油圧室
(9) に所定の油圧を供給する油圧回路(95)、および、リ
ーク回路(96)が設けられる。また、前記油圧室(9) から
前記ロータ(5b)に作用する圧力は、上記ロータ(5a)の場
合と同様に油圧駆動装置(52)の降下駆動圧力に一致させ
ている。The lower rotor (5b) side also has a rolling bearing structure similar to that described above, a hydraulic chamber (9) surrounded by an annular convex portion (92) and a lower bottom (93b) of a concave portion of the holder (65). Hydraulic chamber
(9) is provided with a hydraulic circuit (95) for supplying a predetermined hydraulic pressure, and a leak circuit (96). Further, the pressure acting on the rotor (5b) from the hydraulic chamber (9) is made to coincide with the descent drive pressure of the hydraulic drive (52) as in the case of the rotor (5a).
【００２７】以上のロータ支持構造を採用することか
ら、ロータ(5a)(5b)は共に転がり軸受け機構によって各
ホルダに支持された状態で、回転駆動され、油圧室(9)
(9)には油圧回路(95)(95)からの圧力が作用した状態に
ある。そして、既述の鍛造工程において、被加工材(10)
から金型(301)(302)に作用する鍛造圧力は、油圧室(9)
(9)から各ロータに作用する圧力によって負担されるこ
ととなり、転がり軸受(91)(91)には過度の圧力が作用し
ないものとなる。Since the rotor supporting structure described above is employed, the rotors (5a) and (5b) are rotationally driven while being supported by the respective holders by the rolling bearing mechanism, and the hydraulic chamber (9)
(9) is in a state where the pressure from the hydraulic circuits (95) and (95) is applied. Then, in the forging process described above, the workpiece (10)
Forging pressure acting on the mold (301) (302) from the hydraulic chamber (9)
From (9), it is borne by the pressure acting on each rotor, so that no excessive pressure acts on the rolling bearings (91), (91).
【００２８】なお、鍛造時において、金型(301)(302)に
作用する圧力は鍛造工程の進行に伴って変化することと
なる。ところが、上記各ロータは転がり軸受(91)(91)に
よって対応するホルダにより支持されているものの、ロ
ータと転がり軸受(91)(91)相互は極わずかながら軸線方
向に移動余裕がある。したがって、移動余裕に応じてロ
ータの環状凸部(92)と、ホルダ(54)(65)の凹陥部の上底
または下底との摺動間隙(SG)が変化する。At the time of forging, the pressure acting on the dies (301) and (302) changes with the progress of the forging process. However, although the above-mentioned rotors are supported by the corresponding holders by the rolling bearings (91) and (91), the rotor and the rolling bearings (91) and (91) have a margin of movement in the axial direction, though very slightly. Therefore, the sliding gap (SG) between the annular convex portion (92) of the rotor and the upper or lower bottom of the concave portion of the holder (54) (65) changes according to the movement allowance.
【００２９】このことから、油圧室(9) から各ロータに
作用する圧力が、各金型に作用する鍛造時の反作用圧力
よりも大きい場合には、上記摺動間隙(SG)が大きくなっ
てリーク量が増大し、油圧室(9) からの作用圧力と金型
への前記反作用圧力とがバランスする。逆に、油圧室
(9) から各ロータに作用する圧力が、各金型に作用する
鍛造時の反作用圧力よりも小さい場合には、上記摺動間
隙(SG)が小さくなってリーク量が減少して、同様の圧力
バランスが得られる。From this, when the pressure acting on each rotor from the hydraulic chamber (9) is greater than the reaction pressure during forging acting on each mold, the sliding gap (SG) becomes large. The amount of leak increases, and the working pressure from the hydraulic chamber (9) balances the reaction pressure on the mold. Conversely, hydraulic chamber
From (9), when the pressure acting on each rotor is smaller than the reaction pressure at the time of forging acting on each mold, the sliding gap (SG) becomes small, the leakage amount decreases, and the same Pressure balance is obtained.
【００３０】したがって、自動車用車輪を被加工材(10)
からディスク部(1) を具備する皿状体に回転鍛造成型す
る上記実施例のように、極端に大きな加圧力が金型支持
部、つまり、ロータ支持部に作用するとしても、この加
圧力が油圧室(9) からの圧力によって負担された態様で
これらロータが回転自在に支持されることとなり、回転
鍛造動作が円滑に進行する。Accordingly, the wheel for automobile is processed (10)
Even if an extremely large pressing force acts on the mold supporting portion, that is, the rotor supporting portion, as in the above-described embodiment in which the plate-shaped body having the disk portion (1) is rotationally forged and formed, These rotors are rotatably supported in a mode in which they are borne by the pressure from the hydraulic chamber (9), and the rotary forging operation proceeds smoothly.
【００３１】［その他］なお、上記実施例では、金型(3
01)(302)の回転軸線を共に直立させて同軸上に位置させ
たが、これら金型(301)(302)のいずれか一方をわずかに
傾斜状態に支持して、この傾斜状態で回転させながら、
両方の金型を対抗接近させる態様で回転鍛造する、いわ
ゆるすりこぎ鍛造にも本発明は利用できる。[Others] In the above embodiment, the mold (3
01) and (302) were set up coaxially with the rotation axes thereof upright, but one of these molds (301) and (302) was supported in a slightly inclined state, and rotated in this inclined state. While
The present invention can also be used for so-called rub-in forging, in which both dies are rotationally forged in a mode of approaching each other.
【００３２】例えば、図８に示す装置とすればよい。こ
の実施例では、下方の金型(302) を傾斜姿勢とし、この
金型を取り付けるロータ(5b)に取り付ける第２従動歯車
(502) と、これにかみ合う第２駆動歯車(18)を共に傘歯
車として、この歯車伝動比を第１駆動歯車(17)と第１従
動歯車(501)とのそれに一致させる。そして、下方の金
型(302) の加圧面(33)は、全体として円錐形とし、この
円錐形上の加圧面(33)の裂開ローラ(401) 側の母線を水
平姿勢に設定しておく。For example, the apparatus shown in FIG. 8 may be used. In this embodiment, the lower mold (302) is set in an inclined posture, and the second driven gear attached to the rotor (5b) to which the mold is attached.
(502) and the second drive gear (18) meshing therewith are both bevel gears, and this gear transmission ratio is made to match that of the first drive gear (17) and the first driven gear (501). The pressing surface (33) of the lower mold (302) is conical as a whole, and the generatrix of the pressing surface (33) on the conical shape on the side of the tearing roller (401) is set in a horizontal posture. deep.
【００３３】このような構成とした場合は、金型(301)
(302)によって被加工材(10)を加圧する範囲が極狭い範
囲となることから、前記金型に作用させるべき鍛造圧力
は上記第１実施例の場合に比べて大幅に低減される。
又、上記実施例では、一つの油圧駆動装置(52)によって
ホルダ(54)を昇降駆動させる構成としたが、複数の油圧
駆動装置を採用する構成としても良い。更に、鍛造圧力
と、油圧室(9)(9)からロータ(5a)(5b)に作用する反作用
負担力とを、バランスさせているが、このバランスを確
保するには、油圧室(9) から各ロータに作用する油圧力
及び受圧面積と、油圧駆動装置(52)に作用する油圧力及
びこの油圧駆動装置内の駆動側受圧面積とを共に一致さ
せる方式が有効である。又、これ以外にも、油圧室(9)
側に作用する油圧力と、油圧駆動装置(52)側に作用する
油圧力とが相違する条件であっても、これら油圧力と受
圧面積の積が一致するように設定してもよい。In the case of such a configuration, the mold (301)
Since the range in which the workpiece 10 is pressed is extremely narrow due to (302), the forging pressure to be applied to the mold is significantly reduced as compared with the case of the first embodiment.
In the above embodiment, the holder (54) is driven up and down by one hydraulic drive device (52). However, a plurality of hydraulic drive devices may be employed. Furthermore, the forging pressure and the reaction burden force acting on the rotors (5a) and (5b) from the hydraulic chambers (9) and (9) are balanced.To secure this balance, the hydraulic chamber (9) Therefore, it is effective to make the hydraulic pressure and the pressure receiving area acting on each rotor equal to the hydraulic pressure acting on the hydraulic drive device (52) and the drive-side pressure receiving area in the hydraulic drive device. Also, besides this, hydraulic chamber (9)
Even when the hydraulic pressure acting on the hydraulic drive device (52) side is different from the hydraulic pressure acting on the hydraulic drive device (52) side, the product of the hydraulic pressure and the pressure receiving area may be set to be the same.
【００３４】尚、上記実施例の鍛造工程として熱間鍛造
工程を採用すると、鍛造圧力が冷間鍛造の場合に比べて
大幅に低減できることは言うまでもない。また、上記実
施例では、いずれも自動車用ホイールの鍛造成形装置に
実施したが、他のディスク体の鍛造成形装置にも実施で
きることは言うまでもない。When a hot forging process is employed as the forging process in the above embodiment, it goes without saying that the forging pressure can be greatly reduced as compared with the case of the cold forging. Further, in the above-described embodiments, all of the embodiments are applied to the forging apparatus of the automobile wheel, but it goes without saying that the embodiments can be applied to the forging apparatus of other disk bodies.
【図１】リム部とディスク部が一体のホイールの断面図FIG. 1 is a sectional view of a wheel in which a rim portion and a disc portion are integrated.
【図２】被加工素材(10)から皿状体を鍛造によって成型
する際の初期工程の説明図FIG. 2 is an explanatory view of an initial step when a dish-shaped body is formed by forging from a workpiece (10).
【図３】裂開工程初期の説明図図FIG. 3 is an explanatory view of an initial stage of a cleavage process.
【図４】裂開工程終了時点の説明図FIG. 4 is an explanatory view at the end of a tearing step.
【図５】本発明実施例の装置の説明図FIG. 5 is an explanatory view of an apparatus according to an embodiment of the present invention.
【図６】裂開ローラ(401) 及び成型ローラ(40)と金型と
の関係を示す平面図FIG. 6 is a plan view showing the relationship between a mold and a tearing roller (401) and a molding roller (40).
【図７】皿状体からホイールにロール成型する工程の説
明図FIG. 7 is an explanatory view of a step of roll-forming a dish-like body into a wheel.
【図８】他の実施例の装置の説明図FIG. 8 is an explanatory view of an apparatus according to another embodiment.
(301)(302)・・・金型 (IF)・・・・・・内側端面 (9) ・・・・・・油圧室 (93)・・・・・・底壁 (SG)・・・・・・摺動間隙 (301) (302) ・ ・ ・ Mold (IF) ・ ・ ・ ・ ・ ・ Inner end face (9) ・ ・ ・ ・ ・ ・ Hydraulic chamber (93) ・ ・ ・ ・ ・ ・ Bottom wall (SG) ・ ・ ・... Sliding gap
Claims (1)
方向に同期回転する一対の金型によって加圧することに
より前記金型の対向端面に倣った形状のディスク部を鍛
造成型する鍛造成型装置において、金型一対の金型(30
1)(302)のそれぞれは、ホルダにより極わずかの軸線方
向の移動余裕を有するように回転自在に支持されたロー
タの突出端面に取り付けられ、前記ホルダの一方を油圧
力によって軸線方向に推進後退させる構成とすると共
に、前記ホルダには前記ロータの内側端面(IF)との間に
油圧室(9) を形成し、この油圧室(9) の底壁(93)と前記
内側端面(IF)との間の一部に環状の摺動間隙(SG)を形成
し、この摺動間隙(SG)を介して前記油圧室(9) とリーク
回路とを連通させ、前記油圧室(9) から内側端面(IF)に
作用する圧力の総和と上記金型推進力となる油圧力とを
一致させた鍛造成型装置。1. A forging process in which a workpiece formed of a material capable of being plastically processed is pressed by a pair of dies which rotate synchronously in the same direction, thereby forging a disk having a shape following the opposite end surface of the dies. In the device, a pair of dies (30
1) Each of (302) is attached to a protruding end surface of a rotor rotatably supported by a holder so as to have a very small margin for axial movement, and one of the holders is axially propelled and retracted by hydraulic pressure. A hydraulic chamber (9) is formed between the holder and the inner end face (IF) of the rotor, and a bottom wall (93) of the hydraulic chamber (9) and the inner end face (IF) are formed. An annular sliding gap (SG) is formed at a part between the hydraulic chamber (9) and the leak circuit through the sliding gap (SG), and the hydraulic chamber (9) A forging device in which the sum of the pressures acting on the inner end surface (IF) and the hydraulic pressure serving as the mold propulsion force are matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121736A JP3044513B2 (en) | 1993-05-24 | 1993-05-24 | Forging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121736A JP3044513B2 (en) | 1993-05-24 | 1993-05-24 | Forging equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06328185A JPH06328185A (en) | 1994-11-29 |
| JP3044513B2 true JP3044513B2 (en) | 2000-05-22 |
Family
ID=14818612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5121736A Expired - Lifetime JP3044513B2 (en) | 1993-05-24 | 1993-05-24 | Forging equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3044513B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015223621A (en) * | 2014-05-29 | 2015-12-14 | 荻野工業株式会社 | Forging apparatus |
| JP7116425B2 (en) * | 2019-11-12 | 2022-08-10 | 荻野工業株式会社 | forging equipment |
-
1993
- 1993-05-24 JP JP5121736A patent/JP3044513B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06328185A (en) | 1994-11-29 |
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