JPH084868B2 - Plastic forming method for members with holes - Google Patents

Plastic forming method for members with holes

Info

Publication number
JPH084868B2
JPH084868B2 JP3151883A JP15188391A JPH084868B2 JP H084868 B2 JPH084868 B2 JP H084868B2 JP 3151883 A JP3151883 A JP 3151883A JP 15188391 A JP15188391 A JP 15188391A JP H084868 B2 JPH084868 B2 JP H084868B2
Authority
JP
Japan
Prior art keywords
mandrel
hole
diameter
die
punch
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 - Fee Related
Application number
JP3151883A
Other languages
Japanese (ja)
Other versions
JPH05350A (en
Inventor
一登 小林
利雄 鈴木
Original Assignee
アイダエンジニアリング株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by アイダエンジニアリング株式会社 filed Critical アイダエンジニアリング株式会社
Priority to JP3151883A priority Critical patent/JPH084868B2/en
Publication of JPH05350A publication Critical patent/JPH05350A/en
Publication of JPH084868B2 publication Critical patent/JPH084868B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は、中央に貫通孔の形成さ
れる穴付部材を、塑性加工により得る時に、端部外周に
発生する欠肉部を小さくすることのできる穴付部材の塑
性加工方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic material for a perforated member which is capable of reducing a thinned portion generated on the outer circumference of an end portion when a perforated member having a through hole formed at the center thereof is obtained by plastic working. Regarding processing method.
【0002】[0002]
【従来の技術】従来、外周形状が軸長方向に変化しな
い、円柱,角柱,平歯車等の同一断面形状部材の両端面
を平坦に塑性加工する方法としては、例えば、図10に
示すようなものが知られている。
2. Description of the Related Art Conventionally, as a method of flattening both end faces of a member having the same cross section such as a cylinder, a prism, and a spur gear whose outer peripheral shape does not change in the axial direction, as shown in FIG. Things are known.
【0003】すなわち、この方法では、ダイ11には、
図11に示す平歯車からなる同一断面形状部材13に対
応する形状のダイ孔15が形成されており、ダイ11の
ダイ孔15内に、同一断面形状部材13の内接円より小
さい素材17を投入した後、ダイ孔15の一側および他
側に嵌合するパンチ19およびカウンターパンチ21に
より、素材17を圧縮成形して、ダイ孔15内に素材1
7を充満させることにより、図11に示したような同一
断面形状部材13が形成される。
That is, in this method, the die 11 is
A die hole 15 having a shape corresponding to the member 13 having the same cross-section formed of the spur gear shown in FIG. 11 is formed. After charging, the material 17 is compression-molded by the punch 19 and the counter punch 21 that are fitted to one side and the other side of the die hole 15, and the material 1 is inserted into the die hole 15.
By filling 7 with the same cross-sectional shape member 13 as shown in FIG.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな同一断面形状部材の塑性加工方法では、パンチ19
とカウンターパンチ21により素材17を圧縮成形する
と、材料は、素材17に最も近い点から、最も遠い点に
向かって、すなわち、図11の平歯車では、歯底部23
から歯先部25に向けて順次充満されていくため、歯先
部25には、材料が到達しにくく、図10に示したよう
に、成形された同一断面形状部材13の外周の両端部に
欠肉部27が発生するという問題があった。
However, in such a plastic working method for a member having the same cross-sectional shape, the punch 19 is used.
When the material 17 is compression-molded by the counter punch 21 and the counter punch 21, the material moves from the point closest to the material 17 to the point farthest from the material 17, that is, in the spur gear of FIG.
As the material is less likely to reach the tooth tip portion 25 as the tooth tip portion 25 is sequentially filled with the material from the tooth tip portion 25, as shown in FIG. There was a problem that the lacked portion 27 was generated.
【0005】なお、この欠肉部27を少なくするため
に、素材17に高い応力を作用させると、ダイ11への
応力が増大し、ダイ11が破損する虞れがある。また、
この方法では、素材17に最も遠い点のダイ11との接
合応力が、素材17に最も近い点の接合応力に比較して
極めて低くなり、製品を取り出した時のスプリングバッ
クに部分的なバラツキが生じ、金型の精度を、製品の精
度に転写することが困難になるという問題があった。
If a high stress is applied to the raw material 17 in order to reduce the thickness lacking portion 27, the stress on the die 11 is increased and the die 11 may be damaged. Also,
In this method, the joining stress with the die 11 at the farthest point from the material 17 is extremely lower than the joining stress at the point closest to the material 17, and there is a partial variation in the spring back when the product is taken out. There is a problem that it is difficult to transfer the accuracy of the mold to the accuracy of the product.
【0006】そして、上述した問題は、図12に示すよ
うに、素材17の中央部にマンドレル29を挿入して、
中空状の穴付部材30を成形する時にも、同様に生ず
る。本発明は、上記のような問題を解決したもので、穴
付部材の外周端部に発生する欠肉部を従来より大幅に小
さくすることができるとともに、金型の精度を、製品の
精度に確実に転写することのできる穴付部材の塑性加工
方法を提供することを目的とする。
The above-mentioned problem is that, as shown in FIG. 12, the mandrel 29 is inserted into the central portion of the material 17,
The same occurs when molding the hollow member 30 with holes. The present invention has solved the above-mentioned problems, and it is possible to significantly reduce the thickness reduction portion generated at the outer peripheral end of the perforated member as compared with the conventional one, and to improve the accuracy of the mold to the accuracy of the product. It is an object of the present invention to provide a plastic working method for a holed member that can be reliably transferred.
【0007】[0007]
【課題を解決するための手段】請求項1の穴付部材の塑
性加工方法は、得ようとする穴付部材に対応する形状の
ダイ孔の形成されるダイの前記ダイ孔内に素材を投入す
るとともに、素材の中央に形成される貫通孔にマンドレ
ルの大径部を挿入した後、前記ダイ孔の一側および他側
に嵌合するパンチおよびカウンターパンチにより、素材
を圧縮成形して、前記ダイ孔と前記マンドレルの大径部
との間に素材を充満させ中間素材を得る荒加工工程と、
この荒加工工程の後、前記中間素材の貫通孔から前記マ
ンドレルの大径部を引き抜き、貫通孔にマンドレルの小
径部を挿入し、この後、前記パンチおよびカウンターパ
ンチにより、素材を圧縮成形して、前記ダイ孔とマンド
レルの小径部との間に素材を充満させる仕上加工工程と
を有するものである。
A plastic working method for a holed member according to claim 1 is to insert a material into the die hole of a die in which a die hole having a shape corresponding to the holed member to be obtained is formed. In addition, after inserting the large diameter portion of the mandrel into the through hole formed in the center of the material, the material is compression-molded by a punch and a counter punch fitted to one side and the other side of the die hole, A roughing step of filling the material between the die hole and the large diameter part of the mandrel to obtain an intermediate material;
After this roughing process, the large diameter part of the mandrel is pulled out from the through hole of the intermediate material, the small diameter part of the mandrel is inserted into the through hole, and then the material is compression molded by the punch and counter punch. A finishing process for filling the material between the die hole and the small diameter portion of the mandrel.
【0008】請求項2の穴付部材の塑性加工方法は、得
ようとする穴付部材に対応する形状のダイ孔の形成され
るダイの前記ダイ孔内に素材を投入するとともに、素材
の中央に形成される貫通孔に、大径部と小径部とをテー
パまたは曲面からなる段部により連結してなるマンドレ
ルの前記大径部および段部を、マンドレルを小径部側に
付勢した状態で挿入した後、前記ダイ孔の一側および他
側に嵌合するパンチおよびカウンターパンチにより、素
材を圧縮成形して、前記ダイ孔とマンドレルの大径部と
の間に素材を充満させ中間素材を得る荒加工工程と、こ
の荒加工工程の後、さらに、前記パンチおよびカウンタ
ーパンチにより、素材を圧縮して、この時の素材流動に
よりマンドレルを付勢力に抗して移動させながら前記ダ
イ孔とマンドレルの小径部との間に素材を順次充満させ
る仕上加工工程とを有するものである。
According to a second aspect of the present invention, there is provided a plastic working method for a holed member, wherein a material is put into the die hole of a die in which a die hole having a shape corresponding to the holed member to be obtained is formed, and at the center of the material. In the through hole formed in, the large diameter portion and the step portion of the mandrel formed by connecting the large diameter portion and the small diameter portion by the step portion formed by the taper or the curved surface, in a state in which the mandrel is biased toward the small diameter portion side. After inserting, the material is compression-molded by punches and counter punches that are fitted to one side and the other side of the die hole to fill the material between the die hole and the large diameter part of the mandrel to form an intermediate material. After the roughing process to be obtained, and further after this roughing process, the material is compressed by the punch and counter punch, and the mandrel is moved against the biasing force by the material flow at this time, and the die hole and the mandrel are moved. Those having a finishing step of sequentially filling material between the small diameter portion.
【0009】[0009]
【作用】請求項1の穴付部材の塑性加工方法では、仕上
加工工程において、中間素材とマンドレルの小径部との
間に形成される空間に素材が流動し、この流動により、
中間素材の外周端部に向けての素材の流動が促進され
る。
In the plastic working method for a holed member according to claim 1, in the finishing step, the material flows into the space formed between the intermediate material and the small diameter portion of the mandrel, and by this flow,
Flow of the material toward the outer peripheral edge of the intermediate material is promoted.
【0010】請求項2の穴付部材の塑性加工方法では、
仕上加工工程において、素材の圧縮により、マンドレル
の段部に素材が流動し、この時の素材流動によりマンド
レルが付勢力に抗して移動され、ダイ孔とマンドレルの
小径部との間に素材が順次充満され、この流動により、
中間素材の外周端部に向けての素材の流動が促進され
る。
In the plastic working method of the holed member according to claim 2,
In the finishing process, compression of the material causes the material to flow to the stepped portion of the mandrel, and the material flow at this time moves the mandrel against the biasing force, causing the material to move between the die hole and the small diameter portion of the mandrel. Sequentially filled, this flow,
Flow of the material toward the outer peripheral edge of the intermediate material is promoted.
【0011】[0011]
【実施例】以下、本発明の詳細を図面を用いて実施例に
ついて説明する。図1は、本発明の穴付部材の塑性加工
方法の一実施例に使用される塑性加工装置を示すもの
で、図において符号31は、ダイを示している。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a plastic working apparatus used in an embodiment of the method for plastic working a holed member of the present invention, in which reference numeral 31 denotes a die.
【0012】このダイ31には、図2に示す平歯車から
なる穴付部材33に対応する形状のダイ孔35が形成さ
れている。なお、穴付部材33には、貫通孔36が形成
されている。
The die 31 is formed with a die hole 35 having a shape corresponding to the holed member 33 made of a spur gear shown in FIG. A through hole 36 is formed in the holed member 33.
【0013】そして、ダイ31のダイ孔35の一側およ
び他側には、パンチ37およびカウンターパンチ39が
嵌合されている。カウンターパンチ39には、貫通孔4
1が形成され、この貫通孔41の下部には、ノックアウ
トピン43が挿入されている。
A punch 37 and a counter punch 39 are fitted on one side and the other side of the die hole 35 of the die 31, respectively. The counter punch 39 has through holes 4
1 is formed, and a knockout pin 43 is inserted in the lower portion of the through hole 41.
【0014】一方、貫通孔41の上部には、マンドレル
45の小径部47が挿入されている。マンドレル45
は、小径部47と大径部49とからなり、大径部49
を、パンチ37内に挿入されている。
On the other hand, a small diameter portion 47 of the mandrel 45 is inserted in the upper portion of the through hole 41. Mandrel 45
Is composed of a small diameter portion 47 and a large diameter portion 49.
Is inserted into the punch 37.
【0015】そして、マンドレル45は、パンチ37内
に配置されるスプリング51により、ノックアウトピン
43側に向けて付勢されている。このような装置を使用
して、本発明の穴付部材の塑性加工方法の一実施例が以
下述べるようにして行われる。
The mandrel 45 is biased toward the knockout pin 43 side by the spring 51 arranged in the punch 37. An embodiment of the plastic working method for a holed member of the present invention is carried out by using such an apparatus as described below.
【0016】すなわち、この実施例では、先ず、図1に
示したように、ダイ31のダイ孔35内に、穴付部材3
3の内接円より小さい、貫通孔53の形成される素材5
5が投入され、貫通孔53内にマンドレル45の大径部
49が位置される。
That is, in this embodiment, first, as shown in FIG. 1, the holed member 3 is placed in the die hole 35 of the die 31.
Material 5 having a through hole 53 smaller than the inscribed circle 3
5, the large diameter portion 49 of the mandrel 45 is positioned in the through hole 53.
【0017】この後、パンチ37が下降され、パンチ3
7とカウンターパンチ39により、素材55が圧縮成形
され、ダイ孔35とマンドレル45の大径部49との間
に素材55が充満され中間素材57が得られる。
After that, the punch 37 is lowered and the punch 3
The material 55 is compression-molded by 7 and the counter punch 39, and the material 55 is filled between the die hole 35 and the large diameter portion 49 of the mandrel 45 to obtain the intermediate material 57.
【0018】そして、この後、図3の左側に示すよう
に、ノックアウトピン43を上昇することにより、中間
素材57の貫通孔59からマンドレル45の大径部49
が引き抜かれ、貫通孔59にマンドレル45の小径部4
7が位置される。
After that, as shown on the left side of FIG. 3, the knockout pin 43 is lifted to move from the through hole 59 of the intermediate material 57 to the large diameter portion 49 of the mandrel 45.
Is pulled out, and the small diameter portion 4 of the mandrel 45 is inserted into the through hole 59.
7 is located.
【0019】この後、図3の右側に示すように、パンチ
37およびカウンターパンチ39により、中間素材57
が再度圧縮成形され、ダイ孔35とマンドレル45の小
径部47との間に素材が充満される。
Thereafter, as shown on the right side of FIG. 3, the intermediate material 57 is moved by the punch 37 and the counter punch 39.
Is again compression-molded, and the material is filled between the die hole 35 and the small diameter portion 47 of the mandrel 45.
【0020】そして、この仕上加工工程の終了後に、パ
ンチ37およびカウンターパンチ39が上昇され、所定
形状に成形された穴付部材33が取り出される。しかし
て、上述した穴付部材の塑性加工方法では、成形工程
を、得ようとする穴付部材33に対応する形状のダイ孔
35の形成されるダイ31のダイ孔35内に素材55を
投入するとともに、素材55の中央に形成される貫通孔
53にマンドレル45の大径部49を挿入した後、ダイ
孔35の一側および他側に嵌合するパンチ37およびカ
ウンターパンチ39により、素材55を圧縮成形して、
ダイ孔35とマンドレル45の大径部49との間に素材
を充満させ中間素材57を得る荒加工工程と、この荒加
工工程の後、中間素材57の貫通孔59からマンドレル
45の大径部49を引き抜き、貫通孔59にマンドレル
45の小径部47を挿入し、この後、パンチ37および
カウンターパンチ39により、素材を圧縮成形して、ダ
イ孔35とマンドレル45の小径部47との間に素材を
充満させる仕上加工工程とから構成したので、穴付部材
33の外周端部61に発生する欠肉部を従来より大幅に
小さくすることができるとともに、金型の精度を、製品
の精度に確実に転写することが可能となる。
After the finishing step is completed, the punch 37 and the counter punch 39 are raised, and the holed member 33 formed into a predetermined shape is taken out. Therefore, in the above-described plastic working method of the holed member, the material 55 is put into the die hole 35 of the die 31 in which the die hole 35 having the shape corresponding to the holed member 33 to be obtained is formed. In addition, after inserting the large-diameter portion 49 of the mandrel 45 into the through hole 53 formed in the center of the material 55, the material 55 is punched by the punch 37 and the counter punch 39 fitted to one side and the other side of the die hole 35. Compression molding,
A roughing process for filling the material between the die hole 35 and the large diameter portion 49 of the mandrel 45 to obtain the intermediate material 57, and after this roughing process, from the through hole 59 of the intermediate material 57 to the large diameter portion of the mandrel 45. 49 is pulled out, the small diameter portion 47 of the mandrel 45 is inserted into the through hole 59, and thereafter, the material is compression-molded by the punch 37 and the counter punch 39 so that the die hole 35 and the small diameter portion 47 of the mandrel 45 are compressed. Since it is composed of the finishing process for filling the material, the thickness reduction portion generated at the outer peripheral end portion 61 of the holed member 33 can be made significantly smaller than the conventional one, and the precision of the mold can be made equal to the precision of the product. It is possible to reliably transfer.
【0021】すなわち、この穴付部材の塑性加工方法で
は、仕上加工工程において、中間素材57とマンドレル
45の小径部47との間に形成される空間に素材が流動
し、この流動により、中間素材57の外周端部61に向
けての素材の流動が促進されるため、穴付部材33の外
周端部61に発生する欠肉部を従来より大幅に小さくす
ることができる。
That is, in this plastic working method for a holed member, in the finishing step, the material flows into the space formed between the intermediate material 57 and the small diameter portion 47 of the mandrel 45, and this flow causes the intermediate material to flow. Since the flow of the material toward the outer peripheral end portion 61 of 57 is promoted, it is possible to significantly reduce the thickness reduction portion generated in the outer peripheral end portion 61 of the holed member 33 as compared with the conventional case.
【0022】また、仕上加工工程において、中間素材5
7とマンドレル45の小径部47との間に形成される空
間に素材が流動するため、中間素材57の外周部の応力
が分散され均等となり、製品を取り出した時のスプリン
グバックの部分的なバラツキが小さくなり、金型の精度
を、製品の精度に確実に転写することができる。
In the finishing process, the intermediate material 5
7 flows into the space formed between the small diameter portion 47 of the mandrel 45, the stress in the outer peripheral portion of the intermediate material 57 is dispersed and equalized, and the partial variation of the spring back when the product is taken out. Becomes smaller, and the accuracy of the mold can be reliably transferred to the accuracy of the product.
【0023】図4および図5は、本発明方法の他の実施
例を示すもので、この実施例に使用される塑性加工装置
は、マンドレル63が下型65に取り付けられ、スプリ
ング67により上方に向けて付勢され、マンドレル63
の上部に小径部69が形成され、下部に大径部71が形
成されている。
4 and 5 show another embodiment of the method of the present invention. In the plastic working apparatus used in this embodiment, the mandrel 63 is attached to the lower die 65 and the spring 67 moves upward. Mandrel 63 urged towards
A small-diameter portion 69 is formed on the upper part and a large-diameter portion 71 is formed on the lower part.
【0024】そして、パンチ73の中央に形成される貫
通孔に、上下方向に移動されるピン部材75が挿入され
ている。また、マンドレル63の下部の外側にカウンタ
ーパンチ39を移動するピン部材77が配置されてい
る。
Then, a pin member 75 which is vertically movable is inserted into a through hole formed at the center of the punch 73. Further, a pin member 77 for moving the counter punch 39 is arranged outside the lower part of the mandrel 63.
【0025】このような装置では、図4に示したよう
に、素材55に、マンドレル63の大径部71を挿入し
た状態で荒加工工程が行われ、この後、図5に示したよ
うに、マンドレル63をピン部材75により下方に移動
し、中間素材57の貫通孔59にマンドレル63の小径
部69を位置させた状態で仕上加工工程が行われる。
In such an apparatus, as shown in FIG. 4, the rough machining process is performed with the large diameter portion 71 of the mandrel 63 inserted in the material 55, and thereafter, as shown in FIG. The mandrel 63 is moved downward by the pin member 75, and the finishing process is performed with the small diameter portion 69 of the mandrel 63 positioned in the through hole 59 of the intermediate material 57.
【0026】この実施例の穴付部材の塑性加工方法にお
いても図1に示した実施例とほぼ同様の効果を得ること
ができる。図6および図7は、本発明方法のさらに他の
実施例を示すもので、この実施例に使用される塑性加工
装置は、ダイ31の上方に、スプリング79によりダイ
31側に向けて付勢される上ダイ81が配置され、上ダ
イ81の貫通孔83にパンチ85が嵌挿されている。
Also in the plastic working method of the holed member of this embodiment, it is possible to obtain substantially the same effect as that of the embodiment shown in FIG. 6 and 7 show still another embodiment of the method of the present invention, in which the plastic working apparatus used in this embodiment urges the die 31 above the die 31 toward the die 31 side. The upper die 81 is disposed, and the punch 85 is inserted into the through hole 83 of the upper die 81.
【0027】このような装置では、図6に示したよう
に、上ダイ81およびパンチ85により荒加工工程が行
われ、この後、図7に示したように、パンチ85により
仕上加工工程が行われる。
In such an apparatus, as shown in FIG. 6, the roughing process is performed by the upper die 81 and the punch 85, and then the finishing process is performed by the punch 85 as shown in FIG. Be seen.
【0028】この実施例の穴付部材の塑性加工方法にお
いても図1に示した実施例とほぼ同様の効果を得ること
ができる。図8および図9は、本発明方法のさらに他の
実施例を示すもので、この実施例に使用される塑性加工
装置は、マンドレル87の大径部89と小径部91と
が、テーパまたは曲面状の段部93により接続されてい
る。
Also in the plastic working method of the holed member of this embodiment, substantially the same effect as that of the embodiment shown in FIG. 1 can be obtained. 8 and 9 show still another embodiment of the method of the present invention. In the plastic working apparatus used in this embodiment, the large diameter portion 89 and the small diameter portion 91 of the mandrel 87 are tapered or curved. Are connected by a stepped portion 93.
【0029】このような装置では、図8に示したよう
に、素材95には、マンドレル87の大径部89の外径
に対して、比較的大きなクリアランスAを有するような
貫通孔97が形成される素材が使用される。
In such an apparatus, as shown in FIG. 8, a through hole 97 having a relatively large clearance A with respect to the outer diameter of the large diameter portion 89 of the mandrel 87 is formed in the material 95. Material used is used.
【0030】そして、パンチ37を下降することにより
荒加工工程および仕上加工工程が行われる。すなわち、
この実施例では、成形工程が、得ようとする穴付部材3
3に対応する形状のダイ孔35の形成されるダイ31の
ダイ孔35内に素材95を投入するとともに、素材95
の中央に形成される貫通孔97に、大径部89と小径部
91とをテーパまたは曲面からなる段部93により連結
してなるマンドレル87の大径部89および段部93
を、マンドレル87を小径部91側に付勢した状態で挿
入した後、ダイ孔35の一側および他側に嵌合するパン
チ37およびカウンターパンチ39により、素材95を
圧縮成形して、ダイ孔35とマンドレル87の大径部8
9との間に素材を充満させ中間素材57を得る荒加工工
程と、この荒加工工程の後、さらに、パンチ37および
カウンターパンチ39により、素材を圧縮して、この時
の素材流動によりマンドレル87を付勢力に抗して移動
させながらダイ孔35とマンドレル87の小径部91と
の間に素材を順次充満させる仕上加工工程とから構成さ
れる。
Then, by lowering the punch 37, a roughing process and a finishing process are performed. That is,
In this embodiment, the forming step is performed with the holed member 3 to be obtained.
The material 95 is put into the die hole 35 of the die 31 in which the die hole 35 having the shape corresponding to 3 is formed.
The large diameter portion 89 and the step portion 93 of the mandrel 87 in which the large diameter portion 89 and the small diameter portion 91 are connected by the step portion 93 having a taper or a curved surface to the through hole 97 formed in the center of the
Is inserted with the mandrel 87 biased toward the small diameter portion 91 side, and then the material 95 is compression-molded by the punch 37 and the counter punch 39 fitted to one side and the other side of the die hole 35, and the die hole is formed. 35 and mandrel 87 large diameter section 8
9 and the roughing process for filling the intermediate material 57 with the raw material, and after this roughing process, the material is further compressed by the punch 37 and the counter punch 39, and the mandrel 87 is caused by the material flow at this time. Is performed against the urging force, and the finishing process step is performed in which the material is sequentially filled between the die hole 35 and the small diameter portion 91 of the mandrel 87.
【0031】そして、仕上加工工程において、中間素材
57の圧縮により、マンドレル87の段部93に素材が
流動し、この時の素材流動によりマンドレル87が付勢
力に抗して移動され、ダイ孔35とマンドレル87の小
径部91との間に素材が順次充満され、この流動によ
り、中間素材57の外周端部61に向けての素材の流動
が促進されるため、前述した実施例と同様に、穴付部材
33の外周端部61に発生する欠肉部を従来より大幅に
小さくすることができるとともに、金型の精度を、製品
の精度に確実に転写することが可能となる。
In the finishing step, the intermediate material 57 is compressed to cause the material to flow to the stepped portion 93 of the mandrel 87, and the material flow at this time moves the mandrel 87 against the urging force to cause the die hole 35 to move. And the small diameter portion 91 of the mandrel 87 are sequentially filled with the material, and the flow of the material promotes the material to flow toward the outer peripheral end portion 61 of the intermediate material 57. It is possible to significantly reduce the thickness reduction portion generated at the outer peripheral end portion 61 of the holed member 33 as compared with the related art, and it is possible to reliably transfer the accuracy of the mold to the accuracy of the product.
【0032】なお、以上述べた実施例では、平歯車から
なる穴付部材33の塑性加工に本発明方法を適用した例
について説明したが、本発明はかかる実施例に限定され
るものではなく、穴付部材は、円柱,三角柱,四角柱,
六角柱等でも良く、また、はす歯歯車,傘歯車等であっ
ても良いことは勿論である。
In the above-mentioned embodiment, an example in which the method of the present invention is applied to the plastic working of the holed member 33 made of a spur gear has been described, but the present invention is not limited to this embodiment. The members with holes are cylinders, triangle poles, square poles,
Of course, it may be a hexagonal column or the like, or may be a helical gear, a bevel gear or the like.
【0033】[0033]
【発明の効果】以上述べたように、請求項1および請求
項2の穴付部材の塑性加工方法によれば、穴付部材の外
周端部に発生する欠肉部を従来より大幅に小さくするこ
とができるとともに、金型の精度を、製品の精度に確実
に転写することができるという利点がある。
As described above, according to the plastic working method of the perforated member according to the first and second aspects, the undercut portion generated at the outer peripheral end portion of the perforated member is made much smaller than the conventional one. In addition, it is possible to reliably transfer the accuracy of the mold to the accuracy of the product.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の穴付部材の塑性加工方法の一実施例に
使用される塑性加工装置を示す断面図である。
FIG. 1 is a cross-sectional view showing a plastic working apparatus used in an embodiment of a method of plastic working a holed member of the present invention.
【図2】図1の装置で成形された穴付部材を示す正面図
である。
FIG. 2 is a front view showing a holed member formed by the apparatus of FIG.
【図3】図1の装置による仕上加工工程を示す説明図で
ある。
FIG. 3 is an explanatory view showing a finishing process by the apparatus of FIG.
【図4】本発明の穴付部材の塑性加工方法の他の実施例
に使用される塑性加工装置を示す断面図である。
FIG. 4 is a cross-sectional view showing a plastic working apparatus used in another embodiment of the plastic working method for a holed member of the present invention.
【図5】図4の装置による仕上加工工程を示す説明図で
ある。
5 is an explanatory view showing a finishing process by the apparatus of FIG.
【図6】本発明の穴付部材の塑性加工方法のさらに他の
実施例に使用される塑性加工装置を示す断面図である。
FIG. 6 is a cross-sectional view showing a plastic working apparatus used in still another embodiment of the plastic working method for a holed member of the present invention.
【図7】図6の装置による仕上加工工程を示す説明図で
ある。
FIG. 7 is an explanatory diagram showing a finishing process by the apparatus of FIG.
【図8】本発明の穴付部材の塑性加工方法のさらに他の
実施例に使用される塑性加工装置を示す断面図である。
FIG. 8 is a cross-sectional view showing a plastic working apparatus used in still another embodiment of the plastic working method for a holed member of the present invention.
【図9】図8の装置による仕上加工工程を示す説明図で
ある。
9 is an explanatory diagram showing a finishing process by the apparatus of FIG.
【図10】従来の同一断面形状部材の塑性加工方法を示
す説明図である。
FIG. 10 is an explanatory diagram showing a conventional plastic working method for a member having the same cross-sectional shape.
【図11】図10の方法で成形された同一断面形状部材
を示す正面図である。
FIG. 11 is a front view showing a member having the same cross section formed by the method of FIG.
【図12】従来の穴付部材の塑性加工方法の他の例を示
す説明図である。
FIG. 12 is an explanatory view showing another example of the conventional plastic working method for a member with holes.
【符号の説明】[Explanation of symbols]
31 ダイ 33 穴付部材 35 ダイ孔 37 パンチ 39 カウンターパンチ 45 マンドレル47 小径部49 大径部55 素材
57 中間素材
31 die 33 member with hole 35 die hole 37 punch 39 counter punch 45 mandrel 47 small diameter part 49 large diameter part 55 material 57 intermediate material

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 得ようとする穴付部材に対応する形状の
    ダイ孔の形成されるダイの前記ダイ孔内に素材を投入す
    るとともに、素材の中央に形成される貫通孔にマンドレ
    ルの大径部を挿入した後、前記ダイ孔の一側および他側
    に嵌合するパンチおよびカウンターパンチにより、素材
    を圧縮成形して、前記ダイ孔と前記マンドレルの大径部
    との間に素材を充満させ中間素材を得る荒加工工程と、
    この荒加工工程の後、前記中間素材の貫通孔から前記マ
    ンドレルの大径部を引き抜き、貫通孔にマンドレルの小
    径部を挿入し、この後、前記パンチおよびカウンターパ
    ンチにより、素材を圧縮成形して、前記ダイ孔とマンド
    レルの小径部との間に素材を充満させる仕上加工工程と
    を有することを特徴とする穴付部材の塑性加工方法。
    1. A raw material is put into the die hole of a die having a die hole having a shape corresponding to a holed member to be obtained, and a large diameter mandrel is formed in a through hole formed in the center of the raw material. After inserting the part, the material is compression-molded by a punch and a counter punch that are fitted to one side and the other side of the die hole to fill the material between the die hole and the large diameter part of the mandrel. A roughing process to obtain an intermediate material,
    After this roughing process, the large diameter part of the mandrel is pulled out from the through hole of the intermediate material, the small diameter part of the mandrel is inserted into the through hole, and then the material is compression molded by the punch and counter punch. And a finishing step of filling a material between the die hole and the small diameter portion of the mandrel.
  2. 【請求項2】 得ようとする穴付部材に対応する形状の
    ダイ孔の形成されるダイの前記ダイ孔内に素材を投入す
    るとともに、素材の中央に形成される貫通孔に、大径部
    と小径部とをテーパまたは曲面からなる段部により連結
    してなるマンドレルの前記大径部および段部を、マンド
    レルを小径部側に付勢した状態で挿入した後、前記ダイ
    孔の一側および他側に嵌合するパンチおよびカウンター
    パンチにより、素材を圧縮成形して、前記ダイ孔とマン
    ドレルの大径部との間に素材を充満させ中間素材を得る
    荒加工工程と、この荒加工工程の後、さらに、前記パン
    チおよびカウンターパンチにより、素材を圧縮して、こ
    の時の素材流動によりマンドレルを付勢力に抗して移動
    させながら前記ダイ孔とマンドレルの小径部との間に素
    材を順次充満させる仕上加工工程とを有することを特徴
    とする穴付部材の塑性加工方法。
    2. A material having a large diameter is formed in a through hole formed in the center of the material while the material is put into the die hole of a die having a die hole having a shape corresponding to the holed member to be obtained. And the small-diameter portion, the large-diameter portion and the step portion of the mandrel connected by a step portion formed of a taper or a curved surface, after inserting the mandrel with the mandrel being biased toward the small-diameter portion, one side of the die hole and A roughing process of compressing and molding the material by a punch and a counter punch fitted to the other side to fill the material between the die hole and the large diameter part of the mandrel to obtain an intermediate material, and the roughing process After that, the material is compressed by the punch and counter punch, and the material flows between the die hole and the small-diameter portion of the mandrel while sequentially moving the mandrel against the urging force. Let A plastic working method for a member having a hole, comprising: a finishing step.
JP3151883A 1991-06-24 1991-06-24 Plastic forming method for members with holes Expired - Fee Related JPH084868B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3151883A JPH084868B2 (en) 1991-06-24 1991-06-24 Plastic forming method for members with holes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3151883A JPH084868B2 (en) 1991-06-24 1991-06-24 Plastic forming method for members with holes

Publications (2)

Publication Number Publication Date
JPH05350A JPH05350A (en) 1993-01-08
JPH084868B2 true JPH084868B2 (en) 1996-01-24

Family

ID=15528291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3151883A Expired - Fee Related JPH084868B2 (en) 1991-06-24 1991-06-24 Plastic forming method for members with holes

Country Status (1)

Country Link
JP (1) JPH084868B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2205378B1 (en) 2007-10-17 2018-01-17 Gkn Sinter Metals, Llc Core rod forging for precise internal geometry

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6233015B2 (en) * 1980-05-21 1987-07-17 Wako Kk

Also Published As

Publication number Publication date
JPH05350A (en) 1993-01-08

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