JPS60137537A - Die for roll forging - Google Patents

Abstract

PURPOSE:To simplify mechanism, prevent deviated load applied to a die and perform forging free from under-fill by providing a ring die on outer periphery of a lower die against a rotating and oscillating upper die, and rotating the ring die. CONSTITUTION:The upper die is rotated and oscillated at a specified speed. A rotatable rotary ring die 2 is provided on the outer periphery of a lower die 11 and lifted by a ram device. Uneven parts 12a, 12b are formed on the inner peripheral face of a rotary ring die 12, and when a work 10 is forged, the material flows in the uneven parts 12a, 12b. By rotation of the rotary ring die 12 the material is filled in the lower part, and a forged product free from the state of under-fill at corners 13a, 13b of a bottom die 13 is obtained. The life of the die can be lengthened by this mechanism.

Description

【発明の詳細な説明】 〔発明の対象〕 本発明は、回転鍛造における金型に関するもので、特に
型鍛造における下型の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to a die for rotary forging, and particularly to the structure of a lower die for die forging.

〔従来技術〕[Prior art]

回転鍛造の金型については、公知文献として、昭和５８
年４月１５日発行、アマダ技術ジャーナル、特集、回転
鍛造−Ｈの１０頁に「回転鍛造における加工上の問題点
」としての記載があり、特に２１〜２２頁において、回
転鍛造は金型によつ“ζ素材を完全に拘束して加工を終
了する従来法と異なり、常に広い自由表面をもって揺動
シャフトの揺動回転により加工を進める鍛造法である旨
の説明があり、更に型鍛造のように拘束の強い加工の場
合は、揺動シャフトの揺動軌道として、菊座型揺動軌道
が良好な旨説明がある。Regarding molds for rotary forging, as a publicly known document, 1982
On page 10 of Amada Technology Journal, Special Feature, Rotary Forging-H, published on April 15th, there is a description of "problems in processing in rotary forging," and especially on pages 21 and 22, rotary forging is It was explained that unlike the conventional method in which the machining is completed by completely restraining the material, this forging method uses the oscillating rotation of the oscillating shaft to always maintain a wide free surface, and furthermore, die forging It has been explained that in the case of machining with strong constraints like this, a chrysanthemum-shaped rocking orbit is suitable as the rocking orbit of the rocking shaft.

〔従来技術の問題点及びその技術的分析〕この従来の回
転鍛造における、型鍛造の場合には、強い拘束力のもと
ての加工を行うことにより、ねじれが発生し易く、その
結果、下型の深いくぼみに材料が流れ込んでいく際には
、上型の揺動方向に材料が先に充填され、反対側の隅に
は入り難くなり、欠肉が発生し易い。[Problems in the conventional technology and their technical analysis] In the case of die forging in this conventional rotary forging, twisting is likely to occur due to the machining under strong restraining force, and as a result, the When the material flows into the deep recesses of the mold, the material is filled first in the direction of swing of the upper mold, making it difficult for the material to enter the corners on the opposite side, and underfilling is likely to occur.

これを第１〜２図により説明すれば、１は回転鍛造装置
で、２は本体フレームで、３は上下動が可能なラム、３
ａはノックアウト、４は揺動シャフトで、５は上型、６
は下型で、７は加工物である。To explain this with reference to Figures 1 and 2, 1 is a rotary forging device, 2 is a main body frame, 3 is a ram that can move up and down, 3
a is the knockout, 4 is the swing shaft, 5 is the upper mold, 6
is the lower mold, and 7 is the workpiece.

揺動シャフト４が回転揺動により、下型６の加］二物を
加圧すれば加工物の素材は矢印８の方１ｈ農こ流れるが
、加工物８の表面に凹凸８ａ、８ｂがあると、素材の流
れが悪くなり、下型６の下方のずみ６ｂ、６ｃに欠肉を
生じる。この欠肉は材料の流れが非対称であることに原
因があり、この欠肉を防くために、上型の揺動軌道とし
て、菊座型揺動軌道のような複雑な揺動軌道を行って下
型の欠肉を防止している。When the oscillating shaft 4 rotates and oscillates and presses the lower die 6 and the two objects, the material of the workpiece flows for 1 hour in the direction of the arrow 8, but the surface of the workpiece 8 has irregularities 8a and 8b. As a result, the flow of the material deteriorates, resulting in underfilling in the lower corners 6b and 6c of the lower die 6. This lack of material is caused by the asymmetrical flow of the material, and in order to prevent this, a complex rocking trajectory such as a chrysanthemum-shaped rocking trajectory is used as the rocking trajectory of the upper die. This prevents underfilling of the lower mold.

〔技術的課題〕[Technical issues]

そこで本発明は回転鍛造による、型鍛造に４８いて、上
型の揺動軌道として、複雑な菊座型揺動軌道を行うこと
なく、従来の単純な回転揺動を上型が行うことにより、
下型に欠肉が発止しないことを、その技術的課題とする
ものである。Therefore, the present invention uses die forging by rotary forging, and the upper die performs the conventional simple rotational oscillation without performing a complicated chrysanthemum-shaped oscillation trajectory as the oscillation trajectory of the upper die.
The technical challenge is to prevent underfilling from occurring in the lower die.

〔技術的手段〕[Technical means]

上記技術的課題を解決するために講した技術的手段は、
回転鍛造の型鍛造においζ、上型は所定速度にて回転揺
動を行い、下型の外周部に回転可能な回転リング金型を
設け、一定の加圧力でラム装置が前記下型を上型側に上
昇させて、型鍛造を行うものである。The technical measures taken to solve the above technical problems are:
In rotary forging die forging, the upper die rotates and oscillates at a predetermined speed, a rotatable rotary ring die is provided on the outer periphery of the lower die, and a ram device raises the lower die with a constant pressure. Die forging is performed by raising the die to the die side.

〔技術的手段の作用〕[Effect of technical means]

上記技術的手段は、次のように作用する、すなわち、回
転鍛造において、上型は単純な回転揺動を行い、表面外
周面に凹凸のある製品の鍛造において加工物を載置した
下型、前記下型を外周部に回転可能で、かつ、製品と同
一の凹凸を有する回転リング金型と底型により加工品の
形状を形成し、前記底型に固定型及び側部金型を固定配
置し、前記底型と固定型の中央に、ノックアウトが上下
動出来る貫通孔を設りたもので、加工物を上型と、回転
リング金型と底型よりなる下型にて加圧して、上型を揺
動回転すれば加工物の素材は下型の型内に流れ込んでゆ
き、その際に回転リング金型も、金型内の凹凸部に素材
が流れ込むことにより、上型の揺動回転の１／３〜１／
２程度で回転し、それに伴ない素材は回転リング金型及
び底型のすみずみまで流れ込んで、鍛造を行い、まった
く加工物に欠肉が生じることがないものである。The above technical means works as follows: in rotary forging, the upper die performs simple rotational oscillation, and in forging of a product with an uneven outer circumferential surface, the lower die on which the workpiece is placed; The lower mold can be rotated around the outer periphery, and the shape of the processed product is formed by a rotating ring mold and a bottom mold having the same unevenness as the product, and a fixed mold and a side mold are fixedly arranged on the bottom mold. A through-hole is provided in the center of the bottom mold and the fixed mold to allow the knockout to move up and down, and the workpiece is pressurized by the upper mold and the lower mold consisting of a rotating ring mold and a bottom mold. When the upper mold is oscillated and rotated, the material of the workpiece flows into the lower mold, and at that time, the rotating ring mold also causes the material to flow into the uneven parts in the mold, causing the upper mold to oscillate. 1/3 to 1/ of a rotation
The rotating ring rotates at a speed of about 2, and as the material rotates, the material flows into every corner of the rotating ring mold and the bottom mold to perform forging, and there is no shortage of material in the workpiece.

〔本発明によって生じた特有の効果〕[Special effects produced by the present invention]

本発明は、次の特有の効果を生しる。ずなわら、回転鍛
造の型鍛造において、表面に凹凸部を自する製品の鍛造
においては、複雑な揺動運動である菊座型揺動を行う必
要がないため、回転鍛造装置の機構を単純化することが
でき、機構の故障発生が非當に少なくなり、かつ金型に
加わる偏荷重を防ぐことが出来、従って金型の寿命を大
中に伸はずことが出来るものである。The present invention produces the following unique effects. In rotary forging die forging, when forging products with uneven surfaces, there is no need to perform a complex rocking motion called chrysanthemum-shaped rocking, so the mechanism of the rotary forging equipment is simplified. This greatly reduces the occurrence of mechanism failures, prevents unbalanced loads from being applied to the mold, and greatly extends the life of the mold.

〔実施例〕〔Example〕

以下、上記技術的手段の一具体例を示す実施例について
第３図により説明する。１０は加工物であり、１１は下
型て、回転リング金型１２、底型１３、固定金型１４よ
り構成されており、１５は側部金型である。Hereinafter, an embodiment showing a specific example of the above technical means will be described with reference to FIG. 10 is a workpiece, 11 is a lower mold, which is composed of a rotating ring mold 12, a bottom mold 13, and a fixed mold 14, and 15 is a side mold.

以」二の構成において、加工物１０を回転鍛造により成
形を行う場合、加工物の凹凸部１０ａ、１０ｂの形状を
形成のために、回転リング金型１２の内周面に凹凸部１
２ａ、１２ｂがあり、鍛造の進行に伴い、素材がこの凹
凸部Ｇこ流入し、回転リング金型がＲ方向へ回転するこ
とにより、素材は下方へも充填しコナーＬ３ａ、ｉ３ｂ
において欠肉の状態がまったく発生しないものである。In the second configuration, when the workpiece 10 is formed by rotary forging, the unevenness 1 is formed on the inner peripheral surface of the rotary ring mold 12 in order to form the unevenness 10a, 10b of the workpiece.
2a and 12b, and as forging progresses, the material flows into these uneven parts G, and as the rotating ring die rotates in the R direction, the material also fills downward, forming corners L3a and i3b.
In this case, no shortage of meat occurs at all.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は回転鍛造装置の断面図、第２図は従来例の説明
を示す図で、（イ）は平面図、（ロ）は側部断面図、第
３図は実施例を示すもので、（イ）は側部断面図、（ロ
）は平面図である。 ■・・・回転鍛造装置、５・・・上型、１１・・・下型
、１０・・・加工物、１０ａ、１０ｂ・・・加工物の外
周表面の凹凸、１２・・・回転リング金型、１３・・・
底型、１４・・・固定金型特許出願人 アイシン精Ｉ胚魯禾式会社 代表者中井令夫Figure 1 is a sectional view of a rotary forging device, Figure 2 is a diagram illustrating a conventional example, (a) is a plan view, (b) is a side sectional view, and Figure 3 is a diagram showing an embodiment. , (a) is a side sectional view, and (b) is a plan view. ■... Rotary forging device, 5... Upper die, 11... Lower die, 10... Workpiece, 10a, 10b... Irregularities on the outer peripheral surface of the workpiece, 12... Rotating ring metal Type, 13...
Bottom mold, 14...Fixed mold Patent applicant Aisin Sei I Kei Luhe Type Company Representative Reio Nakai

Claims (1)

【特許請求の範囲】[Claims] 回転鍛造装置の上型と下型により、外周表面に凹凸を有
する形状の加工物を、型鍛造により鍛造を行う場合に、
上型は回転揺動を行い、下型を回転リング金型、底型及
び固定金型より構成し、前記回転リング金型を回転可能
とした、回転鍛造用金型。When forging a workpiece with an uneven outer peripheral surface by die forging using the upper and lower dies of a rotary forging device,
A mold for rotary forging, wherein the upper mold rotates and oscillates, and the lower mold consists of a rotary ring mold, a bottom mold, and a fixed mold, and the rotary ring mold is rotatable.