JPH0871680A - Method for forming annular body with cold press - Google Patents
Method for forming annular body with cold pressInfo
- Publication number
- JPH0871680A JPH0871680A JP23422994A JP23422994A JPH0871680A JP H0871680 A JPH0871680 A JP H0871680A JP 23422994 A JP23422994 A JP 23422994A JP 23422994 A JP23422994 A JP 23422994A JP H0871680 A JPH0871680 A JP H0871680A
- Authority
- JP
- Japan
- Prior art keywords
- hardened
- punch
- ring
- work
- diameter
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば、円柱状もし
くは円筒状のＦｅ製、ＳＵＪ２（高炭素クロム軸受鋼）
製などの金属製ワークの中心部をパンチにより打抜いて
輪体を成形するような冷間プレスによる輪体成形方法に
関する。BACKGROUND OF THE INVENTION The present invention relates to SUJ2 (high carbon chrome bearing steel) made of, for example, cylindrical or cylindrical Fe.
The present invention relates to a ring forming method by a cold press in which a center part of a metal work such as a die is punched to form a ring.
【０００２】[0002]
【従来の技術】従来、ベアリングのインナレース、アウ
タレース、ピロー等の輪体あるいはケージ、スリーブ等
の輪体を冷間プレスにより成形するには、例えばＳＵＪ
２（炭素0.95〜1.10% 、ケイ素0.15〜0.35% 、マンガン
0.50% 以下、リン0.025%以下、イオウ0.025%以下、クロ
ム1.30〜1.60% の科学成分を有するベアリング鋼）製そ
の他の金属製ワークをダイスに配置し、このワークの中
心部をパンチにより打抜いて輪体を成形した後に、例え
ばベアリングのアウタレースに成形する場合には、この
輪体をマンドレル、サポートローラ、成形ローラを用い
て冷間圧延加工してアウタレースと成す。2. Description of the Related Art Conventionally, for example, SUJ has been used to form a ring body such as an inner race, an outer race or a pillow of a bearing or a ring body such as a cage or a sleeve by cold pressing.
2 (carbon 0.95 to 1.10%, silicon 0.15 to 0.35%, manganese
0.50% or less, phosphorus 0.025% or less, sulfur 0.025% or less, bearing steel having a scientific composition of chromium 1.30 to 1.60%) Other metal work is placed in the die, and the center of this work is punched out. When the outer race of the bearing is formed after forming the ring body, the ring body is cold-rolled using a mandrel, a support roller and a forming roller to form an outer race.
【０００３】しかし、上述のワークをパンチにより打抜
いて輪体を成形する時、リング状のワーク内周面はパン
チの打抜き移動時の衝撃、摩擦などにより他部位に対し
て高硬度（例えば素材がＳＵＪ２の場合には他部位のロ
ックウェル硬さが約４０であるのに対して内周面はロッ
クウェル硬さが約３９５）に塑性硬化されるため、図８
に示すように例えばベアリングのアウタレース８１に成
形する時、ベアリング配設用の環状凹部８２に複数の微
小クラック(crack) ８３…が顕著に発生し、上述の冷間
圧延加工による拡径時に図９に示す如く上述の微小クラ
ック８３…が更に大きくなり、製品化が困難となる問題
点があった。However, when the above-mentioned work is punched out to form a ring body, the inner peripheral surface of the ring-shaped work has a high hardness (for example, a material) against other parts due to impact and friction during punching movement of the punch. 8 is SUJ2, the Rockwell hardness of other parts is about 40, whereas the inner peripheral surface is plastically hardened to a Rockwell hardness of about 395).
As shown in FIG. 9, for example, when molding the outer race 81 of the bearing, a plurality of minute cracks 83 ... Remarkably occur in the annular recess 82 for disposing the bearing, and when the diameter is expanded by the cold rolling process described above, FIG. As described above, there is a problem that the above-mentioned minute cracks 83 become further large, which makes it difficult to commercialize.
【０００４】このような問題点を解決するために焼なま
し（焼鈍、annealing 、鉄または鋼の軟化のことで、結
晶組織の調整または内部応力の除去のため、適当な温度
に加熱した後に、ゆっくり冷却する熱処理操作のこと）
処理を施すことが考えられるが、焼なまし処理を施して
も上述の微小クラック８３は残存し、かつ焼なましによ
り金属組織が変化するため望ましくない。In order to solve such a problem, annealing (annealing, annealing, softening of iron or steel, after heating to an appropriate temperature for adjusting the crystal structure or removing internal stress), Heat treatment operation to cool slowly)
Although it is conceivable to perform the treatment, it is not desirable because the minute cracks 83 described above remain after the annealing treatment and the metal structure changes due to the annealing.
【０００５】[0005]
【発明が解決しようとする課題】この発明の請求項１記
載の発明は、パンチの打抜き移動により表面が硬化され
たリング状のワーク内周の表面硬化部位を所定量切削除
去して後加工を施すことにより、金属組織を何等変化さ
せることなく、微小クラックを確実に除去して、後加工
の容易化を達成することができる冷間プレスによる輪体
成形方法の提供を目的とする。According to the first aspect of the present invention, the post-processing is carried out by removing a predetermined amount of the surface-hardened portion of the inner circumference of the ring-shaped work whose surface is hardened by the punching movement of the punch. An object of the present invention is to provide a method for forming a ring body by cold pressing, by which the fine cracks can be surely removed without changing the metal structure and the post-processing can be facilitated.
【０００６】この発明の請求項２記載の発明は、中心部
が打抜かれたリング状の金属製ワークを、２段構造のパ
ンチにより同時に打抜いて小径輪体と大径輪体とを同時
に成形する輪体成形方法において、パンチの打抜き移動
および輪体の相対打抜き移動により表面が硬化されたそ
れぞれの輪体の内外周所定部位を所定量切削除去して後
加工を施すことにより、金属組織を何等変化させること
なく、微小クラックを確実に除去して、小径輪体および
大径輪体の各後加工の容易化を達成することができる冷
間プレスによる輪体成形方法の提供を目的とする。According to a second aspect of the present invention, a ring-shaped metal work having a punched central portion is punched at the same time by a punch having a two-stage structure to simultaneously form a small-diameter wheel body and a large-diameter wheel body. In the ring forming method, the punching movement of the punches and the relative punching movement of the ring bodies cause the metal structure to be cut by a predetermined amount of the inner and outer peripheral predetermined portions of the respective ring bodies, the surface of which has been hardened. An object of the present invention is to provide a ring forming method by a cold press capable of reliably removing small cracks without changing anything and achieving each post-processing of a small diameter wheel and a large diameter wheel. .
【０００７】この発明の請求項３記載の発明は、上記請
求項１もしくは２記載の発明の目的と併せて、表面が硬
化された硬化部位の深さ（微小クラックが発生しやすい
硬度になった深さ）は０．３mmであるため、表面硬化部
位を所定量切削除去する際の該所定量を微小クラックの
深さに余裕代を見込んだ値（例えば０．４mm）に設定
（換言すれば高硬度化層の深さに余裕代を見込んだ値に
設定）のすることで、微小クラックを完全に除去して、
後加工の容易化を達成することができる冷間プレスによ
る輪体成形方法の提供を目的とする。According to the invention of claim 3 of the present invention, in addition to the object of the invention of claim 1 or 2, the depth of the hardened portion where the surface is hardened (hardness in which microcracks are easily generated is obtained. Since the depth) is 0.3 mm, the predetermined amount when cutting and removing the hardened portion by a predetermined amount is set to a value (for example, 0.4 mm) that allows for a margin for the depth of the microcracks (in other words, 0.4 mm). By setting the depth of the hardened layer to a value that allows for margin, the microcracks are completely removed,
An object of the present invention is to provide a method for forming a ring body by a cold press capable of achieving post-processing facilitation.
【０００８】[0008]
【課題を解決するための手段】この発明の請求項１記載
の発明は、円柱状もしくは円筒状の金属製ワークの中心
部をパンチにより打抜いて輪体を成形する冷間プレスに
よる輪体成形方法であって、上記パンチの打抜き移動に
より表面が硬化されたリング状のワーク内周の表面硬化
部位を所定量切削除去して後加工を施す冷間プレスによ
る輪体成形方法であることを特徴とする。According to a first aspect of the present invention, a ring body is formed by a cold press in which a central portion of a cylindrical or cylindrical metal work is punched to form a ring body. A method for forming a ring body by a cold press, in which a predetermined amount of a surface-hardened portion of a ring-shaped work whose surface has been hardened by punching movement of the punch is removed by a predetermined amount for post-processing. And
【０００９】この発明の請求項２記載の発明は、円柱状
の金属製ワークの中心部を第１パンチにより打抜き、次
に中心部が打抜かれたリング状の金属製ワークを、小径
ガイド部と大径パンチ部とを有する第２パンチにより同
時に打抜いて小径輪体を大径輪体とを同時に成形する冷
間プレスによる輪体成形方法であって、上記第１パンチ
の打抜き移動により表面が硬化された小径輪体内周の表
面硬化部位と、各輪体の相対打抜き移動により表面が硬
化された小径輪体外周および大径輪体内周の表面硬化部
位とをそれぞれ所定量切削除去して後加工を施す冷間プ
レスによる輪体成形方法であることを特徴とする。According to a second aspect of the present invention, the center portion of a cylindrical metal work is punched by the first punch, and the ring-shaped metal work is punched at the center, and the ring-shaped metal work is used as a small-diameter guide portion. A method for forming a ring body by a cold press, in which a small-diameter wheel body is simultaneously punched by a second punch having a large-diameter punch section to form a small-diameter wheel body and a large-diameter wheel body, and the surface is formed by punching movement of the first punch. After removing a predetermined amount of the hardened surface of the inner circumference of the small diameter wheel and the hardened surface of the outer circumference of the small diameter wheel and the inner circumference of the large diameter wheel, the surface of which has been hardened by the relative punching movement of each wheel It is characterized in that it is a ring forming method using a cold press for processing.
【００１０】この発明の請求項３記載の発明は、上記請
求項１もしくは２記載の発明の構成と併せて、上記所定
量は表面硬化による微小クラックの深さに余裕代を見込
んだ値に設定した冷間プレスによる輪体成形方法である
ことを特徴とする。According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, the predetermined amount is set to a value that allows for a margin for the depth of microcracks due to surface hardening. It is characterized in that it is a ring forming method by the cold pressing.
【００１１】[0011]
【発明の作用及び効果】この発明の請求項１記載の発明
によれば、金属製ワークの中心部をパンチにより打抜い
て輪体が成形されるが、上述のパンチの打抜き移動によ
り表面が硬化されたリング状のワーク内周の表面硬化部
位は所定量切削除去され、その後において後加工が施さ
れる。According to the invention described in claim 1 of the present invention, the center of the metal work is punched by the punch to form the ring body, and the surface is hardened by the punching movement of the punch. A predetermined amount of the surface-hardened portion on the inner circumference of the ring-shaped work is cut and removed, and then post-processing is performed.
【００１２】このため、金属組織を何等変化させること
なく、微小クラックを確実に除去することができ、また
硬度が高くなった部位を切削除去するので、後加工の容
易化を達成することができると共に、完成された輪体の
製品歩留りの向上を図ることができる効果がある。Therefore, the microcracks can be surely removed without changing the metal structure, and the hardened portion is removed by cutting, so that post-processing can be facilitated. At the same time, there is an effect that the product yield of the completed wheel can be improved.
【００１３】この発明の請求項２記載の発明によれば、
第１パンチにより円柱状の金属製ワークの中心部が打抜
かれ、次に小径ガイド部と大径パンチ部とをもった第２
パンチにより上述の中心部が打抜かれたリング状の金属
製ワークが打抜かれて、小径輪体と大径輪体とが同時に
成形され、次に上述の第１パンチの打抜き移動により表
面が硬化された小径輪体内周の表面硬化部位と、各輪体
の相対打抜き移動により表面が硬化された小径輪体外周
および大径輪体内周の各表面硬化部位とがそれぞれ所定
量切削除去され、その後において後加工が施される。According to the invention of claim 2 of the present invention,
The first punch punches out the central portion of the cylindrical metal work, and then the second punch having the small diameter guide portion and the large diameter punch portion.
The ring-shaped metal work having the above-mentioned center part punched out is punched to form a small-diameter ring body and a large-diameter ring body at the same time, and then the surface is hardened by the punching movement of the first punch. A small amount of the surface hardened part on the inner circumference of the small diameter wheel and the surface hardened part on the outer circumference of the small diameter wheel and the inner circumference of the large diameter wheel, which have been hardened by the relative punching movement of each wheel, are cut and removed. Post processing is applied.
【００１４】この結果、金属組織を何等変化させること
なく、微小クラックを確実に除去することができ、また
硬度が高くなった部位を切削除去するので、小径輪体お
よび大径輪体の各後加工の容易化を達成するとができる
と共に、完成された各輪体の製品歩留りの向上を図るこ
とができる効果がある。As a result, the microcracks can be surely removed without changing the metal structure, and the hardened portion is removed by cutting. Therefore, after the small-diameter wheel body and the large-diameter wheel body, respectively. This has the effects of facilitating the processing and improving the product yield of each finished wheel.
【００１５】この発明の請求項３記載の発明によれば、
上記請求項１もしくは２記載の発明の効果と併せて、上
述の所定量は表面硬化による微小クラックの深さに余裕
代を見込んだ値（通常のワークでは深さ０．３mmまで高
硬度化されるので、切削代を例えば片肉０．４mmまでに
設定する）に設定（換言すれば高硬度化層の深さに余裕
代を見込んだ値に設定）したので、微小クラックおよび
高硬度化層を完全に除去して、後加工の容易化を達成す
ることができる効果がある。According to the invention of claim 3 of the present invention,
In addition to the effect of the invention described in claim 1 or 2, the above-mentioned predetermined amount is a value that allows for a margin for the depth of microcracks due to surface hardening (in a normal work, the hardness is increased to a depth of 0.3 mm. Therefore, the cutting allowance is set to, for example, 0.4 mm per piece) (in other words, the depth of the hardness-increasing layer is set to a value that allows for a margin). Is completely removed to facilitate post-processing.
【００１６】[0016]
【実施例】この発明の一実施例を以下図面に基づいて詳
述する。図面は冷間プレスによる輪体成形方法を示し、
まず図１に示す如くＳＵＪ２製の円柱状（中実状）のワ
ーク１を設け、このワーク１をダイス（図示せず）に配
設した後に図２に示す第１パンチ２により上述のワーク
１の中心部１ａを小径円柱状に打抜いて、該中心部１ａ
が打抜かれたリング状のワーク３を形成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows the ring forming method by cold pressing,
First, as shown in FIG. 1, a cylindrical (solid) work 1 made of SUJ2 is provided, and this work 1 is arranged in a die (not shown), and then the above-mentioned work 1 is removed by a first punch 2 shown in FIG. The central portion 1a is punched out into a small-diameter cylindrical shape,
A ring-shaped work 3 is punched out.
【００１７】図３は上述のリング状のワーク３を冷間プ
レス加工する例えば全容量８０トンのプレス装置を示
し、ダイス穴４、ワーク配設孔５、複数の開閉チャック
６，６を有する抜きダイス７と、小径ガイド部８および
大径パンチ部９を有する第２パンチ１０とを備えてい
る。FIG. 3 shows a pressing device for cold-pressing the above-mentioned ring-shaped work 3 having a total capacity of 80 tons, for example, and having a die hole 4, a work disposing hole 5, and a plurality of opening / closing chucks 6, 6. The die 7 and the second punch 10 having the small diameter guide portion 8 and the large diameter punch portion 9 are provided.
【００１８】上述の抜きダイス７におけるワーク配設孔
５に、中心部１ａが打抜かれたリング状のワーク３を配
設する。この時、ワーク３の外周とワーク配設孔５の内
周面との間には微小クリアランスＣを構成する。この微
小クリアランスＣは打抜き時にワーク３を熱膨張させ
て、該ワーク３が第２パンチ１０に食付くのを防止す
る。A ring-shaped work 3 having a punched central portion 1a is placed in the work placement hole 5 of the punching die 7. At this time, a minute clearance C is formed between the outer periphery of the work 3 and the inner peripheral surface of the work arrangement hole 5. The minute clearance C thermally expands the work 3 during punching and prevents the work 3 from sticking to the second punch 10.
【００１９】次に図３に示す状態から図４に示す如く上
述の第２パンチ１０を矢印方向へ所定速度（例えば７０
mm/sec）乃至高速（音速および音速以上の超音速を含
む）で打抜き移動させて、大径パンチ部９先端の刃部で
上述のワーク３を打抜いて、小径輪体１１と大径輪体１
２とを材料ロスが全くない状態で同時に成形する。Next, from the state shown in FIG. 3, as shown in FIG. 4, the second punch 10 is moved in the direction of the arrow at a predetermined speed (for example, 70).
mm / sec) to high speed (including sonic velocity and supersonic velocity higher than sonic velocity), and punches and moves the above-mentioned work 3 with the blade portion at the tip of the large diameter punch portion 9 to form the small diameter wheel 11 and the large diameter wheel. Body 1
2 and are simultaneously molded with no material loss.
【００２０】上述の第２パンチ１０の復動時には、図５
に示すように開閉チャック６，６で大径輪体１２の端面
を移動阻止した後に、該第２パンチ１０を後退移動する
と、大径輪体１２および小径輪体１１が小径ガイド部８
および大径パンチ部９に食付くことなく、第２パンチ１
０を復動させることができる。When the second punch 10 is moved back, as shown in FIG.
When the second punch 10 is moved backward after the end faces of the large-diameter ring body 12 are blocked by the opening and closing chucks 6 and 6 as shown in FIG. 2, the large-diameter ring body 12 and the small-diameter ring body 11 are moved to the small-diameter guide portion 8.
And the second punch 1 without sticking to the large-diameter punch section 9.
0 can be reactivated.
【００２１】次に図５に示す抜きダイス７内の所定箇所
に位置する大径輪体１２および小径輪体１１をエジェク
ト装置（図示せず）で抜取って図６の如く成す。なお、
図２、図６におけるワーク３、小径輪体１１および大径
輪体１２の各部の寸法の一例は次の通りである。Ｌ＝１
０．１mm、Ｄ１＝１２．０mmφ、Ｄ２＝２１．５mmφ、
Ｄ３＝３０．４mmφ、Ｔ１＝４．７５mmt 、Ｔ２＝４．
４５mmt 、Ｔ３＝９．２mmt で高さＬに対して肉厚Ｔ３
が小さいワーク３からの冷間プレス打抜き加工が可能と
なる。Next, the large-diameter wheel body 12 and the small-diameter wheel body 11 located at predetermined positions in the punching die 7 shown in FIG. 5 are withdrawn by an ejecting device (not shown) to form as shown in FIG. In addition,
An example of the dimensions of the work 3, the small-diameter wheel body 11 and the large-diameter wheel body 12 in FIGS. 2 and 6 is as follows. L = 1
0.1 mm, D1 = 12.0 mm φ , D2 = 21.5 mm φ ,
D3 = 30.4mm φ, T1 = 4.75mm t, T2 = 4.
45 mm t , T3 = 9.2 mm t , and thickness T3 for height L
It is possible to perform cold press punching from a work 3 having a small size.
【００２２】次に図７に示すように、上述の第１パンチ
２の打抜き移動により表面が硬化（塑性硬化）された小
径輪体１１の内周１１ａの表面硬化部位と、各輪体１
１，１２の相対打抜き移動により表面が硬化された小径
輪体１１の外周１１ｂおよび大径輪体１２の内周１２ａ
の各表面硬化部位とを、切削装置（図示せず）によりそ
れぞれ所定量ｂのみ切削除去した後に、製品にすべきベ
アリングのアウタレース、インナレース等に対応した冷
間圧延加工などの後加工を施す。Next, as shown in FIG. 7, the surface-hardened portion of the inner circumference 11a of the small-diameter wheel body 11 whose surface has been hardened (plastically hardened) by the punching movement of the first punch 2 and each wheel body 1
The outer circumference 11b of the small-diameter wheel body 11 and the inner circumference 12a of the large-diameter wheel body 12 whose surfaces are hardened by the relative punching movements of 1 and 12
After each of the surface hardened parts of the above is cut and removed by a cutting device (not shown) by a predetermined amount b, post-processing such as cold rolling corresponding to the outer race, inner race, etc. of the bearing to be made into a product is performed. .
【００２３】ここで、上述の所定量ｂは表面硬化による
微小クラックの深さに余裕代を見込んだ値に設定してい
る。具体的には通常のワークでは深さ０．３mmまでの範
囲がロックウェル硬さで約３９５に高硬度化（塑性硬
化）されるので、切削代を片肉０．４mmまでに設定す
る。Here, the above-mentioned predetermined amount b is set to a value that allows for a margin for the depth of the microcracks due to surface hardening. Specifically, in a normal work, the range up to a depth of 0.3 mm is increased to a hardness of about 395 (plastic hardening) by Rockwell hardness, so the cutting allowance is set to 0.4 mm per piece.
【００２４】このように、第１パンチ２により円柱状の
金属製ワーク１の中心部１ａが打抜かれ、次に小径ガイ
ド部８と大径パンチ部９とをもった第２パンチ１０によ
り上述の中心部１ａが打抜かれたリング状の金属製ワー
ク３が打抜かれて、小径輪体１１と大径輪体１２とが同
時に成形され、次に上述の第１パンチ２の打抜き移動に
より表面が硬化された小径輪体内周１１ａの表面硬化部
位と、各輪体１１，１２の相対打抜き移動により表面が
硬化された小径輪体外周１１ｂおよび大径輪体内周１２
ａの各表面硬化部位とがそれぞれ所定量ｂ切削除去さ
れ、その後において後加工が施される。In this way, the central portion 1a of the cylindrical metal work 1 is punched by the first punch 2, and then the second punch 10 having the small-diameter guide portion 8 and the large-diameter punch portion 9 is used. A ring-shaped metal work 3 having a punched central portion 1a is punched to simultaneously form a small-diameter wheel body 11 and a large-diameter wheel body 12, and then the surface is hardened by the punching movement of the first punch 2 described above. The hardened portion of the inner circumference 11a of the small diameter wheel, and the outer circumference 11b of the small diameter wheel and the inner circumference 12 of the large diameter wheel 12 whose surfaces are hardened by the relative punching movements of the respective wheels 11, 12.
A predetermined amount b of each surface-hardened part of a is removed by cutting, and after that, post-processing is performed.
【００２５】この結果、金属組織を何等変化させること
なく、微小クラックを確実に除去することができ、また
硬度が高くなった部位を切削除去するので、小径輪体１
１および大径輪体１２の各後加工の容易化を達成すると
ができると共に、完成された各輪体の製品歩留りの向上
を図ることができる効果がある。また比較的長時間を要
する焼なまし処理が不要であるため輪体成形時間の短縮
を図ることができる。As a result, the small cracks can be surely removed without changing the metal structure, and the hardened portion is removed by cutting.
1 and the large-diameter wheel 12 can be easily post-processed, and the product yield of each completed wheel can be improved. Further, since the annealing process which requires a relatively long time is not necessary, it is possible to shorten the time for forming the ring body.
【００２６】加えて、上述の所定量ｂは表面硬化による
微小クラックの深さに余裕代を見込んだ値（具体的には
通常のワークでは深さ０．３mmまで高硬度化されるの
で、切削代を例えば片肉０．４mmまでに設定する）に設
定（換言すれば高硬度化層の深さに余裕代を見込んだ値
に設定）したので、微小クラックおよび高硬度化層を完
全に除去して、後加工の容易化を達成することができる
効果がある。In addition, the above-mentioned predetermined amount b is a value that allows for a margin for the depth of microcracks due to surface hardening (specifically, in a normal work, the hardness is increased to a depth of 0.3 mm. Since the margin is set to, for example, 0.4 mm per side) (in other words, the depth of the hardness-increasing layer is set to a value that allows for margin), the microcracks and the hardness-increasing layer are completely removed. Then, there is an effect that the post-processing can be facilitated.
【００２７】なお、上記実施例においてはワーク素材と
してＳＵＪ２（高炭素クロム軸受鋼）を例示したが、こ
のワーク素材は他のベアリング鋼あるいは炭素鋼やＦｅ
等の他の各種金属であってもよいことは勿論であり、ま
たダイス穴４の軸芯線方向は水平方向に限定されること
はなく、上下方向であってもよいことは云うまでもな
い。In the above embodiment, SUJ2 (high carbon chromium bearing steel) was used as an example of the work material, but this work material may be other bearing steel or carbon steel or Fe.
Needless to say, other various metals such as the above may be used, and the axial line direction of the die hole 4 is not limited to the horizontal direction and may be the vertical direction.
【図１】本発明の冷間プレスによる輪体成形に用いられ
るワークの斜視図。FIG. 1 is a perspective view of a work used for forming a ring by a cold press according to the present invention.
【図２】リング状ワーク成形行程を示す斜視図。FIG. 2 is a perspective view showing a ring-shaped work forming process.
【図３】リング状ワークを抜きダイスに配設した状態で
示す断面図。FIG. 3 is a cross-sectional view showing a state in which a ring-shaped work is arranged in a punching die.
【図４】小径輪体と大径輪体との同時成形行程を示す断
面図。FIG. 4 is a sectional view showing a simultaneous molding process of a small diameter wheel and a large diameter wheel.
【図５】パンチ後退時の説明図。FIG. 5 is an explanatory diagram when the punch retracts.
【図６】抜きダイスから取出された各輪体の斜視図。FIG. 6 is a perspective view of each wheel body taken out from the punching die.
【図７】表面硬化部位の切削行程を示す説明図。FIG. 7 is an explanatory diagram showing a cutting process of a surface-hardened portion.
【図８】従来の冷間プレスによるクラック発生状態を示
す半裁斜視図。FIG. 8 is a half-cut perspective view showing a state where cracks are generated by a conventional cold press.
【図９】従来の冷間圧延時のクラック拡大状態を示す部
分拡大断面図。FIG. 9 is a partially enlarged cross-sectional view showing a crack enlarged state during conventional cold rolling.
１．３…ワーク ２…パンチ ８…小径ガイド部 ９…大径パンチ部 １０…第２パンチ １１…小径輪体 １２…大径輪体 １１ａ．１２ａ…内周 １１ｂ…外周 ｂ…所定量 1.3 ... Work 2 ... Punch 8 ... Small-diameter guide part 9 ... Large-diameter punch part 10 ... Second punch 11 ... Small-diameter wheel body 12 ... Large-diameter wheel body 11a. 12a ... inner circumference 11b ... outer circumference b ... predetermined amount
Claims (3)
心部をパンチにより打抜いて輪体を成形する冷間プレス
による輪体成形方法であって、上記パンチの打抜き移動
により表面が硬化されたリング状のワーク内周の表面硬
化部位を所定量切削除去して後加工を施す冷間プレスに
よる輪体成形方法。1. A method for forming a ring body by a cold press, in which a center portion of a cylindrical or cylindrical metal work is punched to form a ring body, the surface being hardened by punching movement of the punch. A ring forming method using a cold press in which a predetermined amount of a hardened portion on the inner circumference of a ring-shaped work is removed by cutting and post-processing is performed.
チにより打抜き、次に中心部が打抜かれたリング状の金
属製ワークを、小径ガイド部と大径パンチ部とを有する
第２パンチにより同時に打抜いて小径輪体を大径輪体と
を同時に成形する冷間プレスによる輪体成形方法であっ
て、上記第１パンチの打抜き移動により表面が硬化され
た小径輪体内周の表面硬化部位と、各輪体の相対打抜き
移動により表面が硬化された小径輪体外周および大径輪
体内周の表面硬化部位とをそれぞれ所定量切削除去して
後加工を施す冷間プレスによる輪体成形方法。2. A center part of a cylindrical metal work is punched by a first punch, and then a ring-shaped metal work is punched at the center part, which has a small-diameter guide part and a large-diameter punch part. A method for forming a ring body by a cold press, which simultaneously punches a small-diameter wheel body and a large-diameter wheel body by punching, wherein the surface of the inner circumference of the small-diameter wheel body is hardened by the punching movement of the first punch. A ring body by a cold press that cuts and removes a predetermined amount of the hardened part and the surface hardened part on the outer circumference of the small diameter wheel body and the inner circumference of the large diameter wheel body whose surfaces have been hardened by the relative punching movement of each wheel body. Molding method.
の深さに余裕代を見込んだ値に設定した請求項１もしく
は２記載の冷間プレスによる輪体成形方法。3. The method for forming a ring body by cold pressing according to claim 1, wherein the predetermined amount is set to a value that allows for a margin for the depth of microcracks due to surface hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6234229A JP2790614B2 (en) | 1994-09-02 | 1994-09-02 | Ring forming method by cold pressing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6234229A JP2790614B2 (en) | 1994-09-02 | 1994-09-02 | Ring forming method by cold pressing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0871680A true JPH0871680A (en) | 1996-03-19 |
| JP2790614B2 JP2790614B2 (en) | 1998-08-27 |
Family
ID=16967724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6234229A Expired - Lifetime JP2790614B2 (en) | 1994-09-02 | 1994-09-02 | Ring forming method by cold pressing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2790614B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7282824B2 (en) | 2002-12-16 | 2007-10-16 | Denso Corporation | Press-fitting method and rectifying device having press-fitted member |
| KR101142135B1 (en) * | 2010-03-04 | 2012-05-10 | 주식회사 프론텍 | Recycling Method of the Rest Member Which Remains from Nut Manufacturing Process |
| CN102501038A (en) * | 2011-09-27 | 2012-06-20 | 张志通 | Processing method for feed inlet of die-casting mold |
| JP2017017192A (en) * | 2015-07-01 | 2017-01-19 | Nok株式会社 | Terminal, sealing plate, capacitor, method of manufacturing terminal and method of manufacturing sealing plate |
| KR20220071684A (en) * | 2020-11-24 | 2022-05-31 | 우주가스팩공업(주) | Successive automatic manufacturing apparatus for gasket |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828435A (en) * | 1981-08-07 | 1983-02-19 | Hitachi Ltd | Manufacturing method of hollow material |
| JPH03243226A (en) * | 1990-02-22 | 1991-10-30 | Mitsubishi Motors Corp | Burring press and its manufacturing method |
| JPH04172134A (en) * | 1990-11-07 | 1992-06-19 | Kanai Hiroyuki | Method for boring bolt hole in wheel disk |
| JPH0639450A (en) * | 1992-07-27 | 1994-02-15 | Toyota Motor Corp | Method and device for burring |
| JPH06114463A (en) * | 1992-10-07 | 1994-04-26 | Aisan Ind Co Ltd | Deburring punch |
-
1994
- 1994-09-02 JP JP6234229A patent/JP2790614B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828435A (en) * | 1981-08-07 | 1983-02-19 | Hitachi Ltd | Manufacturing method of hollow material |
| JPH03243226A (en) * | 1990-02-22 | 1991-10-30 | Mitsubishi Motors Corp | Burring press and its manufacturing method |
| JPH04172134A (en) * | 1990-11-07 | 1992-06-19 | Kanai Hiroyuki | Method for boring bolt hole in wheel disk |
| JPH0639450A (en) * | 1992-07-27 | 1994-02-15 | Toyota Motor Corp | Method and device for burring |
| JPH06114463A (en) * | 1992-10-07 | 1994-04-26 | Aisan Ind Co Ltd | Deburring punch |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7282824B2 (en) | 2002-12-16 | 2007-10-16 | Denso Corporation | Press-fitting method and rectifying device having press-fitted member |
| KR101142135B1 (en) * | 2010-03-04 | 2012-05-10 | 주식회사 프론텍 | Recycling Method of the Rest Member Which Remains from Nut Manufacturing Process |
| CN102501038A (en) * | 2011-09-27 | 2012-06-20 | 张志通 | Processing method for feed inlet of die-casting mold |
| JP2017017192A (en) * | 2015-07-01 | 2017-01-19 | Nok株式会社 | Terminal, sealing plate, capacitor, method of manufacturing terminal and method of manufacturing sealing plate |
| KR20220071684A (en) * | 2020-11-24 | 2022-05-31 | 우주가스팩공업(주) | Successive automatic manufacturing apparatus for gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2790614B2 (en) | 1998-08-27 |
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