JP3153327B2 - Forming method and forming apparatus for tubular member with flange - Google Patents

Forming method and forming apparatus for tubular member with flange

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Publication number
JP3153327B2
JP3153327B2 JP11891492A JP11891492A JP3153327B2 JP 3153327 B2 JP3153327 B2 JP 3153327B2 JP 11891492 A JP11891492 A JP 11891492A JP 11891492 A JP11891492 A JP 11891492A JP 3153327 B2 JP3153327 B2 JP 3153327B2
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JP
Japan
Prior art keywords
cylindrical
die
punch
forming
molding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP11891492A
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Japanese (ja)
Other versions
JPH05317955A (en
Inventor
保郎 孝橋
尚信 金丸
Original Assignee
株式会社日立製作所
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Publication of JPH05317955A publication Critical patent/JPH05317955A/en
Application granted granted Critical
Publication of JP3153327B2 publication Critical patent/JP3153327B2/en
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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、後方押出し加工による
鍔付筒状部材の成形方法及び成形装置に関する。
The present invention relates to relates to a molding method and molding equipment flanged tubular member by the rear extrusion.

【0002】[0002]

【従来の技術】従来の鍔付筒状部材の成形方法に関する
技術について説明する。まず、特公昭34−2760号
公報(第1の従来技術)においては、剪断加工のみによ
り磁性材料に凸部を形成する方法が開示されており、こ
の方法を利用して鍔付筒状部材を成形することができ
る。
2. Description of the Related Art A conventional technique for forming a flanged cylindrical member will be described. First, Japanese Patent Publication No. 34-2760 (first prior art) discloses a method of forming a convex portion on a magnetic material only by shearing, and using this method to form a flanged cylindrical member. Can be molded.

【0003】次に、昭和41年6月発行プレス便覧(塑
性加工研究会及びプレス便覧編集委員会編)150頁〜
151頁(第2の従来技術)においては、深絞り加工お
よびその後の再絞りにより鍔付筒状部材を成形する方法
が開示されている。
[0003] Next, a press handbook issued in June 1967 (Plastic Working Group and Press Handbook Editing Committee), page 150-
On page 151 (second prior art), a method of forming a flanged cylindrical member by deep drawing and subsequent redrawing is disclosed.

【0004】また、後方押出し加工を用いることにより
鍔付筒状部材を成形するものとして、以下のような技術
がある。まず、特開昭57−195542号公報(第3
の従来技術)においては、2枚重ねにした被成形材に浅
い絞り加工を行い、次に後方押出し加工を行うことによ
り、2枚の被成形材を結合させる方法が開示されてい
る。但し、後方押出し加工ようのダイスはその底部と側
面部とが一体構造になっている。この方法では、2枚の
被成形材を結合することを目的としているが、結果とし
て鍔付筒状部材を成形する場合に応用することもでき
る。
Further, there is the following technique for forming a flanged cylindrical member by using a backward extrusion process. First, Japanese Patent Application Laid-Open No. 57-195542 (No. 3)
Japanese Patent Application Laid-Open No. H11-157, discloses a method in which two superposed molding materials are subjected to shallow drawing, followed by backward extrusion, thereby joining the two molding materials. However, the bottom part and the side part of the die for backward extrusion have an integral structure. This method aims at joining two molding materials, but as a result, it can be applied to the case of molding a flanged tubular member.

【0005】次に、特開昭54−127859号公報
(第4の従来技術)においては、予め鍔部を有する被成
形材、場合によっては頂部にパンチガイドを設けたもの
に、頂部よりパンチによって後方押出し加工を行い、こ
れによって鍔付筒状部材を成形する方法が開示されてい
る。
In Japanese Patent Application Laid-Open No. Sho 54-1227859 (fourth prior art), a molding material having a flange portion in advance, and in some cases a punch guide is provided on the top portion, is formed by a punch from the top portion. A method of performing a rear extrusion process and thereby forming a flanged tubular member is disclosed.

【0006】[0006]

【発明が解決しようとする課題】上記第1の従来技術を
利用して鍔付筒状部材を成形する場合は、剪断加工であ
るので被成形材の材厚以上の高さを有する筒状凸部を成
形することができず、また、筒状凸部を任意の肉厚に成
形することができない。また、加工されるのは剪断が起
こる筒状凸部の周辺部分のみであるので、加工硬化の度
合いが低く、板厚の割には強度が低い。
When the tubular member with a flange is formed by utilizing the above-mentioned first prior art, the cylindrical convex member having a height equal to or greater than the thickness of the material to be formed is formed by shearing. The portion cannot be formed, and the cylindrical protrusion cannot be formed to an arbitrary thickness. Further, since only the peripheral portion of the cylindrical convex portion where shearing occurs is processed, the degree of work hardening is low and the strength is low for the thickness of the plate.

【0007】また、上記第2の従来技術は絞り加工のみ
を利用しているため、寸法上の制限を受ける。即ち、絞
り加工であるので上記第1の従来技術と同様に筒状凸部
を任意の肉厚に成形することができないだけでなく、筒
状凸部の径(例えば円筒形の筒状凸部においてはその円
筒の直径)に比べて鍔部の大きさをあまり大きくでき
ず、また、この筒状凸部の径は被成形材の材厚の2倍以
下にすることができない。さらに、絞り加工によって筒
状凸部付近の鍔部の材料が筒状凸部に向かって引張られ
るので、鍔部に寸法変化が生じ、高精度な成形ができな
い。このような寸法上の制限に加えて、絞り加工は材厚
の変化がほとんどないため、第1の従来技術と同様に加
工硬化の度合いが低く、板厚の割には強度が低い。さら
に、始めの深絞り加工とその後の再絞り加工の工程毎に
それぞれに対応するパンチとダイスとを交換する必要が
あり、煩雑な複数工程作業となる。
[0007] Further, since the above-mentioned second prior art utilizes only drawing, there is a limitation on dimensions. In other words, since the drawing process is performed, the cylindrical projection cannot be formed to an arbitrary thickness as in the case of the first related art, and the diameter of the cylindrical projection (for example, the cylindrical cylindrical projection) In this case, the diameter of the flange cannot be made so large as compared with the diameter of the cylinder, and the diameter of the cylindrical projection cannot be less than twice the thickness of the material to be molded. Further, since the material of the flange near the cylindrical protrusion is pulled toward the cylindrical protrusion by the drawing process, a dimensional change occurs in the flange, and high-precision molding cannot be performed. In addition to such dimensional restrictions, drawing hardly changes the material thickness, so that the degree of work hardening is low as in the first prior art, and the strength is low for the plate thickness. Furthermore, it is necessary to replace the corresponding punch and die for each of the initial deep drawing process and the subsequent redrawing process, which is a complicated multi-step operation.

【0008】また、上記第3の従来技術では、後方押出
し加工を用いるので、前述の剪断加工や絞り加工のみを
用いた第1及び第2の従来技術の問題を生じない。しか
し、後方押出し加工時に筒状凸部の外周面全面を拘束し
ていないので、一旦成形された筒状凸部の外周面がその
後の成形荷重によって変形してしまう可能性がある。即
ち、浅い絞り加工の後、パンチ先端面がダイスの上面よ
りも高い位置にある状態で後方押出し加工を開始する
と、せっかく成形された筒状凸部の外周面の鍔部近傍の
部分がその後方押出し加工による成形荷重によって筒状
凸部の径方向に隆起を生じる。また、被成形材の筒状凸
部の材料がダイスの成形穴に対して相対的に移動するの
で、ダイスの成形穴内周面と被成形材外周面との間に生
じる摩擦力をも成形荷重が荷負うことになり、従って成
形荷重が増大する問題がある。
Further, in the third prior art, since backward extrusion is used, the problems of the first and second prior arts using only the above-mentioned shearing and drawing are not caused. However, since the entire outer peripheral surface of the cylindrical convex portion is not restrained during the backward extrusion, the outer peripheral surface of the cylindrical convex portion once formed may be deformed by a subsequent molding load. That is, after the shallow drawing process, when the backward extrusion process is started in a state where the punch tip surface is at a position higher than the upper surface of the die, the portion of the outer peripheral surface of the formed cylindrical convex portion near the flange portion is positioned rearward. Due to the forming load due to the extrusion process, a protrusion is produced in the radial direction of the cylindrical projection. In addition, since the material of the cylindrical convex portion of the molding material moves relatively to the molding hole of the die, the frictional force generated between the inner peripheral surface of the molding hole of the die and the outer peripheral surface of the molding material is also reduced by the molding load. And therefore, there is a problem that the molding load increases.

【0009】さらに第3の従来技術において、後方押出
し加工の前に行う絞り加工では筒状凸部の底面部が支持
されておらず自由端であるので、この部分には1軸また
は2軸応力が加わり、従って割れが発生しやすい。これ
を防止するためには、パンチ先端部やダイス上面部に大
きなアールまたは面取りを設ける必要があり、この場合
には成形される筒状凸部の形状が制限される。
Further, in the third prior art, in the drawing performed before the backward extrusion, the bottom portion of the cylindrical convex portion is not supported and is a free end. And therefore cracks are likely to occur. In order to prevent this, it is necessary to provide a large radius or chamfer at the tip of the punch or the upper surface of the die. In this case, the shape of the cylindrical convex portion to be formed is limited.

【0010】また、第4の従来技術でも、前述の剪断加
工や絞り加工のみを用いた方法による問題を生じない
が、後方押出し加工時に筒状凸部の外周面全面を拘束し
ていないので、やはり一旦成形された筒状凸部の外周面
がその後の成形荷重によって変形してしまう可能性があ
り、またダイスの内面と被成形材外面との間に生じる摩
擦力によって成形荷重が増大する問題がある。
In the fourth prior art as well, there is no problem caused by the above-mentioned method using only the shearing process and the drawing process. However, since the entire outer peripheral surface of the cylindrical convex portion is not restrained at the time of the backward extrusion process, There is a possibility that the outer peripheral surface of the cylindrical convex portion once formed may be deformed by the subsequent forming load, and the forming load increases due to the frictional force generated between the inner surface of the die and the outer surface of the material to be formed. There is.

【0011】本発明の第1の目的は、寸法上の制約が少
なく、また比較的高強度であり、かつ高精度な筒状形状
を得ることができる鍔付筒状部材の成形方法及び成形装
置を提供することにある。
A first object of the present invention is to provide a method and a device for forming a flanged cylindrical member which are less restricted in size, have relatively high strength, and can obtain a highly accurate cylindrical shape.
To provide a location .

【0012】本発明の第2の目的は、寸法上の制約が少
なく、また比較的高強度であり、かつ従来の後方押出し
加工に比べて成形荷重を小さくできる鍔付筒状部材の成
形方法及び成形装置を提供することにある。
A second object of the present invention is to provide a method and a method for forming a flanged cylindrical member which has less dimensional restrictions, has relatively high strength, and can reduce the forming load as compared with conventional backward extrusion. to provide a molded equipment.

【0013】本発明の第3の目的は、寸法上の制約が少
なく、また比較的高強度であり、かつ一工程作業を可能
とする鍔付筒状部材の成形方法及び成形装置を提供する
ことにある。
A third object of the present invention, dimensional constraints are less and relatively high strength, and provides a molding method and molding equipment flanged cylindrical member which enables one step working It is in.

【0014】本発明の第4の目的は、寸法上の制約が少
なく、また比較的高強度であり、かつ成形中に割れが発
生せず、さらにパンチ先端部やダイス上面部に大きなア
ールまたは面取りを設ける必要のない鍔付筒状部材の成
形方法及び成形装置を提供することにある。
A fourth object of the present invention is to reduce dimensional restrictions, to have relatively high strength, not to cause cracks during molding, and to provide a large radius or chamfer at the tip of the punch or the upper surface of the die. the invention is to provide a molding method and molding equipment of unnecessary flanged cylindrical member provided.

【0015】本発明の第5の目的は、寸法上の制約が少
なく、また比較的高強度であり、かつ筒状凸部付近の鍔
部の材料に寸法変化が生じず、さらに高精度な筒状形状
を得ることができる鍔付筒状部材の成形方法及び成形装
置を提供することにある。
[0015] A fifth object of the present invention is to provide a cylinder having a relatively high strength with relatively small strength, a relatively high strength, and no dimensional change in the material of the flange near the cylindrical projection. METHOD AND MOLDING APPARATUS FOR COLUMNED CYLINDRICAL MEMBER CAPABLE OF GETTING FORM
To provide a location .

【0016】[0016]

【課題を解決するための手段】上記第1及び第2の目的
を達成するため、本発明に係わる鍔付筒状部材の成形方
法は、パンチとダイスとノックアウトピンとを有する成
形装置を用い被成形材を鍔部と筒状凸部とを有する鍔付
筒状部材に成形する鍔付筒状部材の成形方法において、
前記被成形材の前記鍔部となる部分の下面を常に前記ダ
イスの上面で支持しかつ前記被成形材の前記筒状凸部と
なる部分の外周面全面を常に前記ダイスの成形穴によっ
て拘束するよう前記ダイスを移動させながら、前記パン
チと前記ノックアウトピンとの間で前記被成形材の前記
筒状凸部の底部となる部分を挟圧して後方押出し加工す
る。
In order to achieve the above first and second objects, a method for forming a flanged tubular member according to the present invention is performed by using a forming apparatus having a punch, a die, and a knockout pin. In a method of forming a flanged tubular member, the material is formed into a flanged tubular member having a flange portion and a cylindrical convex portion,
The lower surface of the portion serving as the flange portion of the molding material is always supported by the upper surface of the die, and the entire outer peripheral surface of the portion serving as the cylindrical convex portion of the molding material is always restrained by the molding hole of the die. As described above, while the die is being moved, a portion to be the bottom of the cylindrical convex portion of the material to be molded is pressed between the punch and the knockout pin, and the material is extruded backward.

【0017】また、上記第3の目的を達成するため、本
発明に係わる鍔付筒状部材の成形方法は、前記後方押出
し加工を行う前に前記パンチと前記ダイスとを用いて前
記被成形材を挟圧し前記鍔付筒上部材の筒状凸部より高
さの低い筒状凸部を予備成形する。
Further, in order to achieve the third object, a method of forming a flanged cylindrical member according to the present invention comprises the step of forming the workpiece by using the punch and the die before performing the backward extrusion. To preform a cylindrical projection having a height lower than the cylindrical projection of the flanged cylinder upper member.

【0018】また、上記第4の目的を達成するため、前
記予備成形は、前記パンチと前記ノックアウトピンとの
間に前記被成形材を挟圧しながら前記パンチと前記ノッ
クアウトピンとを前記ダイスに対して押し下げることに
よって行う。
Further, in order to achieve the fourth object, in the preforming, the punch and the knockout pin are pressed down on the die while pressing the material to be formed between the punch and the knockout pin. By doing.

【0019】また、上記第5の目的を達成するため、前
記予備成形は、前記被成形材に剪断及び張出し加工を施
すことにより行う。
Further, in order to achieve the fifth object, the preforming is performed by subjecting the material to be molded to shearing and stretching.

【0020】[0020]

【0021】また、上記第1から第5の目的を達成する
ため、本発明に係わる鍔付筒状部材の成形装置は、パン
チとダイスとノックアウトピンとを有し、パンチの移動
により被成形材を鍔部と筒状凸部とを有する鍔付筒状部
材に成形する鍔付筒状部材の成形装置において、前記ダ
イスを前記パンチの少なくとも反挿入方向に移動可能に
支持する手段と、前記ノックアウトピンを前記パンチの
少なくとも挿入方向に移動可能に支持する手段と、前記
ノックアウトピンを前記パンチの反挿入方向に付勢する
第1の付勢手段とを有する。
Further, in order to achieve the first to fifth objects, the apparatus for forming a flanged cylindrical member according to the present invention includes a punch, a die, and a knockout pin. In a forming apparatus of a flanged cylindrical member formed into a flanged cylindrical member having a flange portion and a cylindrical convex portion, means for supporting the die so as to be movable at least in a direction opposite to the insertion of the punch, and the knockout pin And means for movably supporting the knockout pin in at least the direction of insertion of the punch, and first biasing means for biasing the knockout pin in the direction opposite to the insertion of the punch.

【0022】[0022]

【0023】[0023]

【0024】また、好ましくは、前記ダイスを前記パン
チの反挿入方向に付勢する第2の付勢手段をさらに有す
る。
Preferably, the apparatus further comprises a second urging means for urging the die in a direction opposite to the insertion of the punch.

【0025】[0025]

【0026】[0026]

【0027】[0027]

【作用】上記のように構成した本発明においては、パン
チとノックアウトピンとを用いて被成形材の筒状凸部の
底部となる部分を挟圧して後方押出し加工を行うことに
よって、前述の剪断加工のみを利用した場合のように成
形される筒状凸部の高さに制限がなくなる。また、絞り
加工のみを利用した場合のように、筒状凸部の肉厚や、
筒状凸部の径(例えば円筒形の筒状凸部においてはその
円筒の直径)と鍔部の大きさとの比や、筒状凸部の径と
被成形材の材厚との関係等、寸法上の制限を受けること
がない。
In the present invention constructed as described above, the above-mentioned shearing process is performed by using a punch and a knockout pin to squeeze the bottom portion of the cylindrical convex portion of the material to be formed and extrude backward. There is no limit on the height of the cylindrical projection formed as in the case where only the protrusion is used. Also, as in the case where only drawing is used, the thickness of the cylindrical convex portion,
The ratio between the diameter of the cylindrical protrusion (for example, in the case of a cylindrical protrusion, the diameter of the cylinder) and the size of the flange, and the relationship between the diameter of the cylindrical protrusion and the thickness of the material to be molded, There are no dimensional restrictions.

【0028】また、後方押出し加工を行うことによっ
て、筒状凸部全体が変形を受け加工硬化するので、筒状
凸部の強度が高くなる。
Further, by performing the backward extrusion, the entire cylindrical convex portion is deformed and work-hardened, so that the strength of the cylindrical convex portion is increased.

【0029】また、筒状凸部付近の鍔部の材料が筒状凸
部に向かって引張られることによる絞り加工に特有の鍔
部の寸法変化も生じなくなり、高精度な筒状形状を得る
ことができる。
Further, the dimensional change of the flange portion peculiar to the drawing process due to the fact that the material of the flange portion near the cylindrical convex portion is pulled toward the cylindrical convex portion does not occur, and a highly accurate cylindrical shape can be obtained. Can be.

【0030】また、筒状凸部となる被成形材部分の外周
面全面を常にダイスの成形穴によって拘束しながら後方
押出し加工を行うことによって、パンチとダイスとの寸
法の組合せを適当に選定すれば筒状凸部の肉厚を任意の
寸法に成形できる。また、ダイスの成形穴の拘束によ
り、一旦成形された筒状凸部の外周部の鍔部近傍部分が
その後の後方押出し加工による成形荷重によって径方向
に隆起する等の変形が防止され、高精度な筒状形状を得
ることができる。
Also, by performing backward extrusion while constantly constraining the entire outer peripheral surface of the material to be formed into the cylindrical convex portion by the forming hole of the die, the combination of the dimensions of the punch and the die can be appropriately selected. For example, the thickness of the cylindrical convex portion can be formed to an arbitrary size. In addition, due to the restriction of the forming hole of the die, the deformation such as the protrusion near the flange on the outer peripheral portion of the once formed cylindrical convex portion being protruded in the radial direction due to the forming load due to the subsequent backward extrusion processing is prevented, and high precision is achieved. A cylindrical shape can be obtained.

【0031】また、筒状凸部の外周面全面を常に拘束す
るようダイスを移動させながら後方押出し加工を行うこ
とによって、ダイスの成形穴内面と被成形材の筒状凸部
外周面との間に摩擦力が生じないので、成形荷重を従来
の後方押出し加工に比べて小さくすることができる。
Further, by extruding backward while moving the die so as to constantly restrain the entire outer peripheral surface of the cylindrical convex portion, the gap between the inner surface of the forming hole of the die and the outer peripheral surface of the cylindrical convex portion of the material to be formed is formed. Since no frictional force is generated, the molding load can be reduced as compared with the conventional backward extrusion.

【0032】また、上記後方押出し加工の前に、後方押
出し加工に使用されるのと同一のパンチ及びダイスを用
いて筒状凸部を予備成形することにより、筒状凸部の予
備成形からその後の後方押出し加工までの一連の成形工
程を一工程作業とすることができる。
Further, before the above-mentioned backward extrusion, the cylindrical protrusion is preformed using the same punch and die used for the backward extrusion, so that the cylindrical protrusion is preformed and thereafter. A series of molding steps up to backward extrusion can be made as one-step operation.

【0033】また、パンチとノックアウトピンとの間に
被成形材を挟圧しながらパンチとノックアウトピンとを
ダイスに対して押し下げることによって予備成形を行う
ことにより、パンチとノックアウトピンとの間の被成形
材には3軸応力が加わり延性が向上して割れの発生が防
げる。また、割れの発生が防げるので、パンチ先端部や
ダイス上面部に大きなアールまたは面取りを設ける必要
もなくなり、成形される筒状凸部の形状も制限を受け
ず、所望の筒状形状を得ることができる。
Also, by preforming by pressing the punch and the knockout pin against the die while pressing the material between the punch and the knockout pin, the material between the punch and the knockout pin can be preformed. A triaxial stress is applied to improve ductility and prevent the occurrence of cracks. In addition, since cracking can be prevented, it is not necessary to provide a large radius or chamfer at the tip of the punch or the upper surface of the die, and the shape of the formed cylindrical convex portion is not limited, and a desired cylindrical shape can be obtained. Can be.

【0034】また、剪断及び張出し加工により予備成形
を行うことによって、予備成形においても、筒状凸部の
肉厚や、筒状凸部の径(例えば円筒形の筒状凸部におい
てはその円筒の直径)と鍔部の大きさとの比や、筒状凸
部の径と被成形材の材厚との関係等、寸法上の制限を受
けることがない。また、筒状凸部付近の鍔部の材料が筒
状凸部に向かって引張られることによる絞り加工に特有
の鍔部の寸法変化も生じなくなり、高精度な筒状形状を
得ることができる。
Further, by performing the preforming by shearing and stretching, the thickness of the cylindrical convex portion and the diameter of the cylindrical convex portion (for example, in the case of a cylindrical cylindrical convex portion, There is no dimensional limitation, such as the ratio of the diameter of the flange to the size of the flange, or the relationship between the diameter of the cylindrical protrusion and the thickness of the material to be molded. In addition, since the material of the flange near the cylindrical convex is pulled toward the cylindrical convex, the dimensional change of the flange specific to the drawing process does not occur, and a highly accurate cylindrical shape can be obtained.

【0035】また、ダイスをパンチの少なくとも反挿入
方向に移動可能に支持することにより、パンチとノック
アウトピンとの間で被成形材を挟圧して後方押出し加工
するとき、少なくともダイスの成形穴円周面と被成形材
との間に生じる摩擦力により、ダイスはパンチの反挿入
方向に移動し、筒状凸部の外周面全面が拘束される。
Further, by supporting the die so as to be movable in at least the direction opposite to the insertion direction of the punch, at the time of pressing the material to be formed between the punch and the knockout pin and extruding backward, at least the circumferential surface of the forming hole of the die. The die moves in the direction opposite to the insertion of the punch due to the frictional force generated between the die and the molding material, and the entire outer peripheral surface of the cylindrical projection is restrained.

【0036】また、ノックアウトピンもパンチの少なく
とも挿入方向に移動可能に支持し、ノックアウトピンを
パンチの反挿入方向に付勢する第1の付勢手段を設ける
ことにより、筒状凸部の予備成形において、パンチを押
し下げるときパンチとノックアウトピンとの間に被成形
材を挟圧しながらパンチとノックアウトピンはダイスに
対して押し下げられる。
Also, the knockout pin is supported so as to be movable in at least the inserting direction of the punch, and the first urging means for urging the knockout pin in the direction opposite to the insertion of the punch is provided, so that the cylindrical convex portion is preformed. In the above, when the punch is pushed down, the punch and the knockout pin are pushed down with respect to the die while pressing the workpiece between the punch and the knockout pin.

【0037】また、ダイスをパンチの反挿入方向に付勢
する第2の付勢手段を設けることにより、後方押出し加
工に際して摩擦力だけでなくこの付勢手段の作用によっ
てもダイスは移動し、筒状凸部の外周面全面の拘束を確
実に行える。
Further, by providing the second urging means for urging the die in the direction opposite to the insertion direction of the punch, the die moves not only by the frictional force but also by the action of this urging means at the time of backward extruding, and the cylinder moves. The entire outer peripheral surface of the convex portion can be reliably restrained.

【0038】[0038]

【実施例】以下、本発明の一実施例による鍔付筒状部材
の成形方法及び成形装置について図1から図5を参照し
ながら説明する。尚、以下の説明において被成形材及び
成形された鍔付筒状部材は全て断面図で表し、煩雑さを
避けるため一部断面を表す斜線を省略する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and an apparatus for forming a flanged tubular member according to an embodiment of the present invention will be described below with reference to FIGS. In the following description, the material to be molded and the formed cylindrical member with a flange are all shown in cross-sectional views, and oblique lines representing a partial cross section are omitted to avoid complexity.

【0039】図2は、本実施例による鍔付筒状部材の成
形装置に被成形材を装填した状態を示す図であり、この
図によって本成形装置の構成を説明する。図2に示すよ
うに、本成形装置は、それぞれ断面が円形のパンチ1、
ダイス2、ノックアウトピン3を有している。このうち
パンチ1は、パンチホルダ1aに支持されており、パン
チホルダ1aはボルト1bによってパンチプレート10
0に固定されている。そして、コラム101に沿ってパ
ンチプレート100を上下に移動させることによりパン
チ1を荷重をかけつつ移動させ被成形材50を成形す
る。
FIG. 2 is a view showing a state in which a material to be molded is loaded in the apparatus for molding a flanged cylindrical member according to the present embodiment, and the structure of the present molding apparatus will be described with reference to FIG. As shown in FIG. 2, the present molding apparatus has a punch 1 having a circular cross section,
It has a die 2 and a knockout pin 3. The punch 1 is supported by a punch holder 1a, and the punch holder 1a is
It is fixed to 0. Then, by moving the punch plate 100 up and down along the column 101, the punch 1 is moved while applying a load to form the molding material 50.

【0040】また、ダイス2はロッド2cにより上下方
向に移動可能に支持され、その下限位置は、ボルト2a
によって基盤102に固定されたダイスプレート2bの
上面により画定され、上限位置は、ダイス2上面の段付
孔2eの段付部に当るショルダボルト2cの太径部2d
によって画定されている。ショルダボルト2cはダイス
プレート2bに固定されている。また、ダイス2は第2
の付勢手段であるバネ4によって上向き、即ち成形時の
パンチ1の反挿入方向に付勢されており、荷重がかかっ
ていない状態では、図2のようにバネ4が伸びて上限位
置にあり、成形時荷重がかかると下限位置まで下降(移
動)する。
The die 2 is supported by a rod 2c so as to be movable in the vertical direction.
The upper end position is defined by the upper surface of the die plate 2b fixed to the base 102, and the upper limit position is the large diameter portion 2d of the shoulder bolt 2c corresponding to the stepped portion of the stepped hole 2e on the upper surface of the die 2.
Is defined by The shoulder bolt 2c is fixed to the die plate 2b. Dice 2 is the second
The spring 4 is biased upward, that is, in the direction opposite to the insertion direction of the punch 1 during molding. When no load is applied, the spring 4 is extended as shown in FIG. When a load is applied at the time of molding, it lowers (moves) to the lower limit position.

【0041】また、ノックアウトピン3はダイス2及び
ダイスプレート2bにより上下方向に移動可能に支持さ
れ、その下限位置は、ストッパ5の上面により画定さ
れ、上限位置は、ダイスプレート2b下面の段付孔2f
の段付部に嵌合するノックアウトピン3の太径部3aに
より画定されている。また、ノックアウトピン3は、ス
クリュープラグ7上に設置された付勢手段であるバネ6
によって上向き、即ち成形時のパンチ1の反挿入方向に
付勢されており、パンチによる荷重がかかっていない時
には図2のようにバネ6が伸びて上限位置にあり、成形
時荷重がかかると、ストッパ5の上面に接する下限位置
まで下降(移動)する。尚、ダイス2及びノックアウト
ピン3のどちらにも荷重がかかっていないときには、図
2のようにノックアウトピン3の上面はダイス2の上面
よりも下にある。
The knockout pin 3 is vertically movably supported by the die 2 and the die plate 2b. The lower limit position is defined by the upper surface of the stopper 5, and the upper limit position is a stepped hole on the lower surface of the die plate 2b. 2f
Are defined by the large-diameter portion 3a of the knockout pin 3 fitted into the stepped portion. The knockout pin 3 is provided with a spring 6 serving as an urging means installed on the screw plug 7.
The spring 6 is urged upward, that is, in the direction opposite to the insertion direction of the punch 1 during molding, and when no load is applied by the punch, the spring 6 extends as shown in FIG. It descends (moves) to the lower limit position in contact with the upper surface of the stopper 5. When no load is applied to either the die 2 or the knockout pin 3, the upper surface of the knockout pin 3 is lower than the upper surface of the die 2 as shown in FIG.

【0042】次に本実施例による鍔付筒状部材の成形方
法について説明する。まず、図2のように、例えばSP
CC等の被成形材50をダイス2の上に位置決めし、パ
ンチ1とダイス3とで被成形材50を挟む。この状態
で、パンチ1に荷重をかけ押し下げると、図3に示すよ
うに、バネ4の付勢力に抗してダイス2は下限位置まで
下降する。この時ほぼ同時に、被成形材50の下面はノ
ックアウトピン3の上面に当る。但し、被成形材50は
まだ変形を受けない。
Next, a method of forming a flanged tubular member according to this embodiment will be described. First, as shown in FIG.
A molding material 50 such as CC is positioned on the die 2, and the molding material 50 is sandwiched between the punch 1 and the die 3. In this state, when a load is applied to the punch 1 and pressed down, the die 2 descends to the lower limit position against the urging force of the spring 4 as shown in FIG. At about the same time, the lower surface of the molding material 50 hits the upper surface of the knockout pin 3. However, the molding material 50 is not yet deformed.

【0043】さらにパンチ1を押し下げると、ダイス2
は下限位置にあって移動しないので、被成形材50は、
鍔部50aを残してパンチ1とダイス2とで挟圧され、
図4に示すように剪断及び張出し加工によって筒状に変
形する。この時ノックアウトピン3は被成形材の変形部
50bによって圧され、バネ6の付勢力に抗して下降す
る。即ち、変形部50bはパンチ1とノックアウトピン
3とによって挟圧されながら変形することになる。そし
て、ノックアウトピン3が下限位置に達するまで被成形
材は加工を受ける。ここまでが予備成形の工程である。
When the punch 1 is further pushed down, the dies 2
Is at the lower limit position and does not move.
The punch 1 and the die 2 squeeze each other, leaving the flange 50a.
As shown in FIG. 4, it is deformed into a cylindrical shape by shearing and overhanging. At this time, the knockout pin 3 is pressed by the deformed portion 50b of the molding material, and descends against the urging force of the spring 6. That is, the deformable portion 50b is deformed while being pinched by the punch 1 and the knockout pin 3. The workpiece is processed until the knockout pin 3 reaches the lower limit position. This is the preforming step.

【0044】上記のように、パンチ1とノックアウトピ
ン3との間に変形部50bを挟圧しながら予備成形を行
うことによって、変形部50bには3軸応力が加わり延
性が向上して割れの発生が防げる。従って、パンチ1の
先端部やダイス2の上面部に大きなアールまたは面取り
を設ける必要もなくなり、成形される筒状凸部の形状も
これによって制限を受けることがない。
As described above, by performing preforming while pressing the deformed portion 50b between the punch 1 and the knockout pin 3, triaxial stress is applied to the deformed portion 50b, ductility is improved, and cracks occur. Can prevent. Therefore, it is not necessary to provide a large radius or chamfer at the tip of the punch 1 or the upper surface of the die 2, and the shape of the cylindrical convex portion to be formed is not limited by this.

【0045】また、上記予備成形を絞り加工で行うので
はなく、剪断及び張出し加工で行うことによって、筒状
凸部の肉厚や、筒状凸部の径(例えば円筒形の筒状凸部
においてはその円筒の直径)と鍔部の大きさとの比や、
筒状凸部の径と被成形材の材厚との関係等、寸法上の制
限を受けることがない。また、筒状凸部付近の鍔部の材
料が筒状凸部に向かって引張られることによる絞り加工
に特有の鍔部の寸法変化も生じなくなり、高精度な筒状
形状を得ることができる。
The preforming is performed not by drawing but by shearing and stretching, so that the thickness of the cylindrical convex portion and the diameter of the cylindrical convex portion (for example, a cylindrical cylindrical convex portion) are obtained. The diameter of the cylinder) and the size of the flange,
There is no dimensional limitation, such as the relationship between the diameter of the cylindrical projection and the thickness of the material to be molded. In addition, since the material of the flange near the cylindrical convex is pulled toward the cylindrical convex, the dimensional change of the flange specific to the drawing process does not occur, and a highly accurate cylindrical shape can be obtained.

【0046】次に、上記のような予備成形に引き続き、
さらにパンチ1を押し下げると、ノックアウトピン3は
下限位置にあって移動しないので、被成形材50の変形
部50bはパンチ1とノックアウトピン3とで挟圧さ
れ、該変形部が後方押出し加工を受ける。即ち、図1に
示すように、パンチ1とノックアウトピン3とで挟圧さ
れて減少した板厚分に相当する材料が、パンチ1とダイ
ス2との間に流れることにより筒状凸部50cを形成す
る。この時、後方押出し加工による筒状凸部50cの形
成に伴って鍔部50aが上昇するが、筒状凸部50cの
外周面とダイス2の成形穴内周面との間に生じる摩擦力
と、ダイス2に取り付けられたバネ4の付勢力とによ
り、ダイス2もこの鍔部50a下面及び筒状凸部50c
の外周面に密着したまま上昇(移動)する。つまり、ダ
イス2は、形成されつつある筒状凸部50cに対して相
対的に移動せずに、該筒状凸部を拘束した状態で上昇
(移動)する。
Next, following the above preforming,
When the punch 1 is further pressed down, the knockout pin 3 is at the lower limit position and does not move, so that the deformed portion 50b of the molding material 50 is pinched by the punch 1 and the knockout pin 3, and the deformed portion undergoes backward extrusion. . That is, as shown in FIG. 1, the material corresponding to the reduced thickness due to the pinching between the punch 1 and the knockout pin 3 flows between the punch 1 and the die 2, thereby causing the cylindrical convex portion 50 c to move. Form. At this time, the flange portion 50a rises with the formation of the cylindrical convex portion 50c by the backward extrusion process, and the frictional force generated between the outer peripheral surface of the cylindrical convex portion 50c and the inner peripheral surface of the forming hole of the die 2 ; Due to the urging force of the spring 4 attached to the die 2, the die 2 also has a lower surface of the flange 50 a and a cylindrical convex 50 c.
Rises (moves) while being in close contact with the outer peripheral surface of the. That is, the die 2 does not relatively move with respect to the cylindrical protrusion 50c being formed, but rises (moves) in a state where the cylindrical protrusion is restrained.

【0047】このように、筒状凸部50cの外周面全面
を常にダイス2の内面によって拘束した状態で後方押出
し加工を行うことにより、パンチ1とダイス2の寸法を
適当に選定することによってこの部分の肉厚を制限なく
任意の寸法に設定することができまた、一旦成形された
筒状凸部50cの外周面の鍔部近傍部分(筒状凸部50
cの付け根)がその後の成形荷重によって径方向に隆起
する等の変形を防止できる。
As described above, the rear extrusion is performed while the entire outer peripheral surface of the cylindrical convex portion 50c is always constrained by the inner surface of the die 2, so that the dimensions of the punch 1 and the die 2 are appropriately selected. The thickness of the portion can be set to an arbitrary size without limitation, and a portion near the flange on the outer peripheral surface of the cylindrical protrusion 50c once formed (the cylindrical protrusion 50c).
c) can be prevented from being deformed such as being raised in the radial direction by a subsequent forming load.

【0048】また、筒状凸部50cの外周面に対してダ
イス2が相対的に移動しないよう密着したままの状態で
後方押出し加工を行うことによって、両者の間に生じる
摩擦力を成形荷重が荷負う必要がなくなり、成形荷重を
従来の後方押出し加工に比べて小さくすることができ
る。
Further, by performing the backward extrusion while keeping the die 2 in close contact with the outer peripheral surface of the cylindrical convex portion 50c so as not to relatively move, the frictional force generated between the two is reduced by the forming load. There is no need to carry, and the molding load can be reduced as compared with the conventional backward extrusion.

【0049】尚、バネ4は、上記のようにダイス2を筒
状凸部50cの外周面及び鍔部50aに密着させたまま
確実に上昇(移動)させるように付勢力を与えるもので
あるが、筒状凸部50cの外周面とダイス2の成形穴内
周面との間の摩擦力のみによってもダイス2を上昇させ
ることが可能な場合もあり、この場合はバネ4は省略し
てもよい。
The spring 4 applies a biasing force so that the die 2 is securely raised (moved) while keeping the die 2 in close contact with the outer peripheral surface of the cylindrical projection 50c and the flange 50a as described above. In some cases, the die 2 can be raised only by the frictional force between the outer peripheral surface of the cylindrical projection 50c and the inner peripheral surface of the forming hole of the die 2, and in this case, the spring 4 may be omitted. .

【0050】また、上記予備成形とこれに続く後方押出
し加工は、同一の成形装置によって一工程作業によって
行われる。このようにして、筒状凸部50cの高さ、
厚等が所定の寸法、形状になるまで成形を行うことによ
り、図5に断面図で示すような形状の鍔付筒状部材を、
一工程作業で容易に得ることができる。
The preforming and the subsequent backward extrusion are carried out in one step by the same forming apparatus. In this manner, the height of the cylindrical protruding portion 50c, meat
By forming until the thickness and the like have a predetermined size and shape, a flanged cylindrical member having a shape as shown in a cross-sectional view in FIG.
It can be easily obtained by one-step operation.

【0051】また、被成形材50の変形部50bの全体
が変形を受け加工硬化するので、成形された鍔付筒状部
材の強度が高くなる。
Further, since the entire deformed portion 50b of the material 50 is deformed and work-hardened, the strength of the formed flanged cylindrical member is increased.

【0052】図6に、本実施例を同軸リダクションスタ
ータに適用した例を断面図で示す。図6に示す同軸リダ
クションスタータ用の歯車ブラケット10は、回り止め
用筒状凸部10aを有しており、この筒状凸部10aは
上記実施例による成形方法により成形されている。
FIG. 6 is a sectional view showing an example in which this embodiment is applied to a coaxial reduction starter. The gear bracket 10 for a coaxial reduction starter shown in FIG. 6 has a rotation preventing cylindrical convex portion 10a, and the cylindrical convex portion 10a is molded by the molding method according to the above embodiment.

【0053】以上のように本実施例によれば、パンチ1
とノックアウトピン3とを用いて被成形材50を挟圧し
て後方押出し加工を行うので、寸法上の制限を受けるこ
とがなく、高精度な筒状形状を得ることができる。
As described above, according to this embodiment, the punch 1
Since the backward extrusion is performed by pressing the molding material 50 using the knockout pin 3 and the knockout pin 3, a highly accurate cylindrical shape can be obtained without being limited by dimensions.

【0054】また、筒状凸部50c全体が変形を受け加
工硬化するので、筒状凸部50cの強度が高くなる。
Further, since the entirety of the cylindrical projection 50c is deformed and work-hardened, the strength of the cylindrical projection 50c is increased.

【0055】また、絞り加工に特有の鍔部50aの寸法
変化が生じなくなり、高精度な筒状形状を得ることがで
きる。
Further, the dimensional change of the flange portion 50a peculiar to the drawing process does not occur, and a highly accurate cylindrical shape can be obtained.

【0056】また、筒状凸部50cの外周面全面を常に
ダイス2の成形穴によって拘束しながら後方押出し加工
を行うので、パンチ1とダイス2との寸法の組合せを適
当に選定すればこの部分の肉厚を任意の寸法に成形でき
る。また、ダイスの成形穴の拘束により、一旦成形され
た筒状凸部50cの外周部の鍔部近傍部分がその後の後
方押出し加工による成形荷重によって径方向に隆起する
等の変形が防止され、高精度な筒状形状を得ることがで
きる。
Further, since the rear extrusion is performed while the entire outer peripheral surface of the cylindrical convex portion 50c is always constrained by the forming holes of the die 2, if a combination of the dimensions of the punch 1 and the die 2 is appropriately selected, this portion can be obtained. Can be formed to any thickness. In addition, due to the restriction of the forming hole of the die, the deformation such as the radial prominence of the portion near the flange portion of the outer peripheral portion of the once formed cylindrical convex portion 50c due to the forming load due to the subsequent backward extrusion is prevented, An accurate cylindrical shape can be obtained.

【0057】また、筒状凸部50cの外周面全面を常に
拘束するようダイス2を移動させながら後方押出し加工
を行うことによって、ダイス2の成形穴内面と筒状凸部
50c外周面との間に摩擦力が生じないので、成形荷重
を従来の後方押出し加工に比べて小さくすることができ
る。
Further, by extruding backward while moving the die 2 so as to constantly restrain the entire outer peripheral surface of the cylindrical convex portion 50c, the gap between the inner surface of the forming hole of the die 2 and the outer peripheral surface of the cylindrical convex portion 50c is formed. Since no frictional force is generated, the molding load can be reduced as compared with the conventional backward extrusion.

【0058】また、後方押出し加工に使用されるのと同
一のパンチ1及びダイス2を用いて筒状凸部50cを予
備成形するので、一連の成形工程を一工程作業とするこ
とができる。
Further, since the cylindrical convex portion 50c is preformed by using the same punch 1 and die 2 used for the backward extrusion, a series of forming steps can be performed as one process.

【0059】また、パンチ1とノックアウトピン3との
間に被成形材50を挟圧しながら予備成形を行うので、
パンチ1とノックアウトピン2との間の被成形材の延性
が向上して割れの発生が防げる。これにより、パンチ先
端部やダイス上面部に大きなアールまたは面取りを設け
る必要もなくなり、成形される筒状凸部の形状も制限を
受けず、所望の筒状形状を得ることができる。
Further, since the preforming is performed while pressing the molding material 50 between the punch 1 and the knockout pin 3, the preforming is performed.
The ductility of the material to be formed between the punch 1 and the knockout pin 2 is improved, and the occurrence of cracks can be prevented. Accordingly, it is not necessary to provide a large radius or chamfer at the tip of the punch or the upper surface of the die, and the shape of the cylindrical convex portion to be formed is not limited, and a desired cylindrical shape can be obtained.

【0060】また、剪断及び張出し加工により予備成形
を行うので、予備成形においても、絞り加工と異なり、
素材及び成形後の形状での寸法上の制限を受けることが
なく、また、絞り加工に特有の鍔部の寸法変化も生じな
くなり、高精度な筒状形状を得ることができる。
Further, since the preforming is performed by shearing and stretching, the preforming is also different from the drawing in the preforming.
There is no restriction on the dimensions of the material and the shape after molding, and there is no dimensional change of the flange part peculiar to drawing, so that a highly accurate cylindrical shape can be obtained.

【0061】次に、本発明の他の実施例による鍔付筒状
部材の成形方法及び成形装置について図7から図11を
参照しながら説明する。尚、以下においては、パンチ、
ダイス、ノックアウトピン、及び被成形材以外の部材は
省略した模式的な断面図によって説明し、煩雑さを避け
るため一部断面を表す斜線を省略する。また、図7から
図10における各部材に付した参照番号のうち図1から
4における各部材に付した参照番号と同一の番号を付し
たものは同一の部材を表すものとする。
Next, a method and an apparatus for forming a flanged tubular member according to another embodiment of the present invention will be described with reference to FIGS. In the following, a punch,
Members other than the die, the knockout pin, and the material to be molded will be described with reference to a schematic cross-sectional view in which illustration is omitted, and oblique lines representing a partial cross section will be omitted to avoid complexity. Also, among the reference numbers assigned to the members in FIGS. 7 to 10, those assigned the same reference numerals as the reference numerals assigned to the members in FIGS. 1 to 4 represent the same members.

【0062】本実施例で使用する鍔付筒状部材の成形装
置は、前述した実施例のものと同一である。また、被成
形材としては、図7に示すようなSPCC等の材料をダ
イス2の内径に合うように凸型に予め加工し凸部51c
を形成したものを用いる。この凸部51cの高さ等の寸
法は最終的に得たい鍔付筒状部材の高さ、肉厚等より計
算して決定する。
The forming device for the flanged tubular member used in this embodiment is the same as that of the above-described embodiment. As a material to be molded, a material such as SPCC as shown in FIG.
Is used. The dimensions such as the height of the convex portion 51c are determined by calculating from the height, wall thickness and the like of the flanged tubular member to be finally obtained.

【0063】次に本実施例による鍔付筒状部材の成形方
法について説明する。まず、図7に示すように、ダイス
2の成形穴に被加工材51の凸部51dを嵌合させて位
置決めし、パンチ1とダイス3とで被成形材51を挟
む。この状態で、前述した実施例と同様にパンチ1に荷
重をかけ押し下げると、バネ4の付勢力に抗してダイス
2は下限位置まで下降して止まり、被成形材51の下面
がノックアウトピン3の上面に当る。さらにパンチ1を
押し下げると、図8に示すように、被成形材51は、鍔
部51aを残してパンチ1とダイス2とで挟圧され、変
形部51bはパンチ1とノックアウトピン3とによって
挟圧されながら剪断び張出し加工によって筒状に変形す
る。このようにして被成形材51はその高さをさらに増
大する。そして、図9に示すように、ノックアウトピン
3が下限位置に達したところで予備成形の工程が終わ
る。
Next, a method of forming a flanged tubular member according to the present embodiment will be described. First, as shown in FIG. 7, the projection 51 d of the workpiece 51 is fitted and positioned in the molding hole of the die 2, and the workpiece 51 is sandwiched between the punch 1 and the die 3. In this state, when a load is applied to the punch 1 and pressed down in the same manner as in the above-described embodiment, the die 2 descends to the lower limit position against the urging force of the spring 4 and stops. Hit the top of the When the punch 1 is further pressed down, as shown in FIG. 8, the molding material 51 is pinched by the punch 1 and the die 2 while leaving the flange 51a, and the deformed portion 51b is pinched by the punch 1 and the knockout pin 3. It is deformed into a cylindrical shape by shearing and stretching while being pressed. Thus, the height of the molding material 51 is further increased. Then, as shown in FIG. 9, when the knockout pin 3 reaches the lower limit position, the preforming step ends.

【0064】次に、図10に示すように、上記の予備成
形に引き続き、ノックアウトピン3が下限位置にある状
態でパンチ1を押し下げ、被成形材51の変形部51b
をパンチ1とノックアウトピン3とで挟圧し、該変形部
に後方押出し加工を施す。この時、前述の実施例と同様
に、ダイス2に取り付けられたバネ4の付勢力及び筒状
凸部51cとダイス2内面との間に働く摩擦力により、
ダイス2はこの鍔部51a及び筒状凸部51cに密着し
たまま、形成されつつある筒状凸部51cに対して相対
的に移動せずに、該筒状凸部を拘束した状態で上昇(移
動)する。
Next, as shown in FIG. 10, following the above preforming, the punch 1 is pushed down with the knockout pin 3 at the lower limit position, and the deformed portion 51b of the material 51 is formed.
Is pressed between the punch 1 and the knockout pin 3, and the deformed portion is subjected to backward extrusion. At this time, similarly to the above-described embodiment, the urging force of the spring 4 attached to the die 2 and the frictional force acting between the cylindrical convex portion 51c and the inner surface of the die 2 cause
The dies 2 are kept in close contact with the flange portion 51a and the cylindrical convex portion 51c, do not move relatively to the cylindrical convex portion 51c being formed, and rise in a state where the cylindrical convex portion is restrained ( Moving.

【0065】本実施例においても、上記予備成形とこれ
に続く後方押出し加工は、同一の成形装置によって一工
程作業によって行われる。このようにして、筒状凸部5
1cの高さ、肉厚等がが所定の寸法、形状になるまで成
形を行うことにより、図11に断面図で示すような形状
の鍔つき筒状部材を、一工程作業で容易に得ることがで
きる。
Also in the present embodiment, the preforming and the subsequent backward extrusion are performed in one step by the same forming apparatus. Thus, the cylindrical convex portion 5
By forming until the height, thickness, etc. of 1c become a predetermined size and shape, a flanged cylindrical member having a shape as shown in a sectional view in FIG. 11 can be easily obtained in one process. Can be.

【0066】以上のように本実施例によれば、前述の実
施例と同様の効果が得られるだけでなく、被加工材51
にダイス2の内面に嵌合可能な凸部51dを設けるの
で、成形前の位置決めが容易であり、また、筒状凸部の
底面部の形状は、予め被加工材51の凸部51dとして
加工しておくことができるので、より高精度な筒状形状
にすることができ、また、筒状凸部51cの高さもその
肉厚の割に高くできる。
As described above, according to this embodiment, not only the same effects as in the above-described embodiment can be obtained, but also
Since the protrusion 51d that can be fitted to the inner surface of the die 2 is provided, positioning before molding is easy, and the shape of the bottom surface of the cylindrical protrusion is processed in advance as the protrusion 51d of the workpiece 51. Therefore, it is possible to form the cylindrical shape with higher precision, and the height of the cylindrical convex portion 51c can be increased for its thickness.

【0067】次に、本発明のさらに他の実施例による鍔
付筒状部材の成形方法及び成形装置について図12を参
照しながら説明する。図12は、本実施例による鍔付筒
状部材の成形装置を示す図であって後方押出し加工を行
っている状態を示す図であり、各部材に付した参照番号
のうち図1から4における各部材に付した参照番号と同
一の番号を付したものは同一の部材を表すものとする。
Next, a method and an apparatus for forming a flanged cylindrical member according to still another embodiment of the present invention will be described with reference to FIG. FIG. 12 is a view showing a molding apparatus for a flanged tubular member according to the present embodiment, and is a view showing a state in which backward extrusion is being performed, and reference numerals in FIGS. Those given the same reference numerals as the reference numbers given to the respective members represent the same members.

【0068】本実施例で使用する鍔付筒状部材の成形装
置においては、ダイス2Aを上向き、即ち成形時のパン
チ1の反挿入方向に付勢する付勢手段として、図1から
図4のバネ4に代えて流体圧駆動のシリンダ装置を利用
している。これ以外の構成は図1から図5の実施例のも
のと同一である。
In the apparatus for forming a flanged cylindrical member used in the present embodiment, the urging means for urging the die 2A upward, that is, in the direction opposite to the insertion of the punch 1 during molding, is shown in FIGS. Instead of the spring 4, a cylinder device driven by fluid pressure is used. The other structure is the same as that of the embodiment of FIGS.

【0069】以下、この流体圧駆動のシリンダ装置につ
いて説明する。図12に示すように、ダイス2Aはダイ
スボックスを兼ねたピストン11により上下方向に移動
可能に支持され、さらにピストン11はシリンダ12に
挿入されている。このピストン11及びシリンダ12に
はそれぞれが互いに接する部分にOリング13,14が
嵌め込まれており、これによってシリンダ12に供給さ
れる流体がシールされる。そして、予備成形時には(図
示していないが)被成形材50とダイス2とを介してパ
ンチ1によってピストン11を押し下げ、シリンダ12
内の流体を流体供給口15から抜くことにより、ピスト
ン11、従ってダイス2Aが下限位置まで下降(移動)
する。また、その後の後方押出し加工時には、図12に
示すように、シリンダ12内に流体供給口15より流体
が供給されて鍔部50aの上昇と共にピストン11、従
ってダイス2Aが上昇する。つまり、シリンダ12に供
給された流体圧が前述した2つの実施例におけるバネ4
と同様の作用をし、ダイス2Aは形成されつつある筒状
凸部50cに対して相対的に移動せずに、該筒状凸部を
拘束した状態で上昇(移動)する。
Hereinafter, the cylinder device driven by the fluid pressure will be described. As shown in FIG. 12, the die 2 </ b> A is supported by a piston 11, which also serves as a die box, so as to be vertically movable, and the piston 11 is inserted into a cylinder 12. O-rings 13 and 14 are fitted in portions of the piston 11 and the cylinder 12 that are in contact with each other, thereby sealing a fluid supplied to the cylinder 12. At the time of preforming (not shown), the piston 11 is pushed down by the punch 1 through the molding material 50 and the die 2, and the cylinder 12 is pressed.
By pulling out the fluid inside from the fluid supply port 15, the piston 11, and hence the die 2A, descends (moves) to the lower limit position.
I do. In the subsequent backward extrusion process, as shown in FIG. 12, the fluid is supplied from the fluid supply port 15 into the cylinder 12, and the piston 11 and thus the die 2A rises with the rise of the flange 50a. That is, the fluid pressure supplied to the cylinder 12 is controlled by the spring 4 in the two embodiments described above.
The die 2A does not move relatively to the cylindrical projection 50c being formed, but rises (moves) with the cylindrical projection restricted.

【0070】尚、本実施例では、ダイス2Aを上向き、
即ち成形時のパンチ1の反挿入方向に付勢する付勢手段
として流体圧駆動のシリンダ装置を利用したが、ノック
アウトピン3を上向き、即ち成形時のパンチ1の反挿入
方向に付勢する付勢手段としてこれを利用してもよい。
この場合には図12のバネ6を省略できる。
In this embodiment, the die 2A is turned upward,
That is, although a fluid pressure driven cylinder device is used as urging means for urging the punch 1 in the direction opposite to the insertion direction during molding, the knockout pin 3 is directed upward, that is, in the direction opposite to the insertion direction of the punch 1 during molding. This may be used as a force means.
In this case, the spring 6 of FIG. 12 can be omitted.

【0071】本実施例による鍔付筒状部材の成形方法は
図1から図5に示した実施例と同様である。
The method of forming the flanged tubular member according to the present embodiment is the same as the embodiment shown in FIGS.

【0072】以上のように本実施例によれば、図1から
図5に示した実施例と同様の効果が得られる。
As described above, according to this embodiment, the same effects as those of the embodiment shown in FIGS. 1 to 5 can be obtained.

【0073】[0073]

【発明の効果】本発明によれば、被成形材の筒状凸部の
底部となる部分を挟圧して後方押出し加工を行うので、
剪断加工のみを利用した場合や、絞り加工のみを利用し
た場合のように、素材や成形後の形状での寸法上の制限
を受けることがなく、高精度な筒状形状を得ることがで
きる。
According to the present invention, the rear extrusion is performed by clamping the bottom portion of the cylindrical convex portion of the material to be molded.
Unlike a case where only the shearing process is used or a case where only the drawing process is used, a high-precision cylindrical shape can be obtained without being limited by the dimensions of the material or the shape after molding.

【0074】また、筒状凸部全体が変形を受け加工硬化
するので、筒状凸部の強度が高くなる。
Further, since the entire cylindrical convex portion is deformed and work-hardened, the strength of the cylindrical convex portion is increased.

【0075】また、絞り加工に特有の鍔部の寸法変化が
生じなくなり、高精度な筒状形状を得ることができる。
Further, the dimensional change of the flange portion peculiar to the drawing process does not occur, and a highly accurate cylindrical shape can be obtained.

【0076】また、筒状凸部となる部分の外周面全面を
常にダイスの成形穴によって拘束しながら後方押出し加
工を行うので、パンチとダイスとの寸法の組合せによっ
てこの部分の肉厚を任意の寸法に成形できる。
Further, since the rear extrusion process is performed while always restraining the entire outer peripheral surface of the portion to be the cylindrical convex portion by the forming hole of the die, the thickness of this portion can be arbitrarily determined by the combination of the dimensions of the punch and the die. Can be molded to dimensions.

【0077】また、ダイスの成形穴の拘束により、一旦
成形された筒状凸部の外周部の鍔部近傍部分がその後の
後方押出し加工により変形することが防止され、高精度
な筒状形状を得ることができる。
Further, by restricting the forming hole of the die, the vicinity of the flange portion on the outer peripheral portion of the once formed cylindrical convex portion is prevented from being deformed by the subsequent backward extrusion process, and a highly accurate cylindrical shape is formed. Obtainable.

【0078】また、筒状凸部の外周面全面を常に拘束す
るようダイスを移動させながら後方押出し加工を行うの
で、成形荷重を従来の後方押出し加工に比べて小さくす
ることができる。
Further, since the backward extrusion is performed while moving the die so as to constantly restrain the entire outer peripheral surface of the cylindrical convex portion, the molding load can be reduced as compared with the conventional backward extrusion.

【0079】また、上記と同一のパンチ及びダイスを用
いて筒状凸部を予備成形するので、一連の成形工程を一
工程作業とすることができる。
Further, since the cylindrical convex portion is preformed by using the same punch and die as described above, a series of forming steps can be performed as one process.

【0080】また、パンチとノックアウトピンとの間に
被成形材を挟圧しながら剪断及び張出し加工によって予
備成形を行うので、被成形材の延性が向上して割れの発
生が防げる。従って、パンチ先端部やダイス上面部の形
状、さらに成形される筒状凸部の形状、寸法に制限がな
く、高精度な筒状形状を得ることができる。
Further, since the preforming is performed by shearing and stretching while pressing the molding material between the punch and the knockout pin, the ductility of the molding material is improved and generation of cracks can be prevented. Accordingly, there is no limitation on the shape of the tip of the punch or the upper surface of the die, and the shape and dimensions of the cylindrical protrusion to be formed, and a highly accurate cylindrical shape can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例による鍔付筒状部材の成形方
法及び成形装置を示す断面図であって、後方押出し加工
を行う状態を示す図である。
FIG. 1 is a cross-sectional view showing a forming method and a forming apparatus of a flanged tubular member according to an embodiment of the present invention, showing a state in which backward extrusion is performed.

【図2】図1の鍔付筒状部材の成形装置に被成形材を装
填した状態を示す断面図である。
FIG. 2 is a cross-sectional view showing a state where a material to be molded is loaded in the molding device for a flanged tubular member of FIG. 1;

【図3】図1の鍔付筒状部材の成形装置によって被成形
材に予備成形を行う直前の状態を示す断面図である。
FIG. 3 is a cross-sectional view showing a state immediately before preforming is performed on a material to be molded by a molding device for a flanged tubular member in FIG. 1;

【図4】図1の鍔付筒状部材の成形装置によって予備成
形を行う状態を示す断面図である。
FIG. 4 is a cross-sectional view showing a state in which preforming is performed by a forming device for a flanged tubular member in FIG. 1;

【図5】図1の鍔付筒状部材の成形方法及び成形装置に
よって得られる鍔付筒状部材の断面図である。
5 is a cross-sectional view of the flanged tubular member obtained by the method and apparatus for forming a flanged tubular member of FIG. 1;

【図6】本発明の一実施例による鍔付筒状部材の成形方
法及び成形装置同軸をリダクションスタータに適用した
例を示す断面図である。
FIG. 6 is a cross-sectional view showing an example in which a flanged cylindrical member forming method and a forming device coaxial according to an embodiment of the present invention are applied to a reduction starter.

【図7】本発明の他の実施例による鍔付筒状部材の成形
方法及び成形装置を説明する模式的な断面図であって、
予備成形を行う直前の状態を示す図である。
FIG. 7 is a schematic cross-sectional view illustrating a method and an apparatus for forming a flanged tubular member according to another embodiment of the present invention;
It is a figure showing the state immediately before performing preforming.

【図8】図7の鍔付筒状部材の成形装置によって予備成
形を行う状態を示す断面図である。
8 is a cross-sectional view showing a state in which preforming is performed by the forming device for a flanged tubular member of FIG. 7;

【図9】図7の鍔付筒状部材の成形装置によって予備成
形を終わり、後方押出し加工を行う直前の状態を示す断
面図である。
FIG. 9 is a cross-sectional view showing a state immediately after the pre-molding is completed by the molding device for the flanged tubular member in FIG. 7 and immediately before the backward extrusion is performed.

【図10】図7の鍔付筒状部材の成形装置によって後方
押出し加工を行う状態を示す断面図である。
FIG. 10 is a cross-sectional view showing a state in which rearward extrusion is performed by the forming device of the flanged tubular member of FIG. 7;

【図11】図7の鍔付筒状部材の成形方法及び成形装置
によって得られる鍔付筒状部材の断面図である。
11 is a cross-sectional view of a flanged tubular member obtained by the method and apparatus for forming a flanged tubular member of FIG. 7;

【図12】本発明のさらに他の実施例による鍔付筒状部
材の成形方法及び成形装置を説明する断面図であって、
後方押出し加工を行う状態を示す図である。
FIG. 12 is a cross-sectional view illustrating a forming method and a forming apparatus of a flanged tubular member according to still another embodiment of the present invention;
It is a figure showing the state where back extrusion processing is performed.

【符号の説明】[Explanation of symbols]

1 パンチ 2,2A ダイス 3 ノックアウトピン 4 バネ 5 ストッパ 6 バネ 11 シリンダ 12 ピストン 13,14 Oリング 15 流体供給口 Reference Signs List 1 punch 2, 2A die 3 knockout pin 4 spring 5 stopper 6 spring 11 cylinder 12 piston 13, 14 O-ring 15 fluid supply port

フロントページの続き (56)参考文献 特開 平2−247036(JP,A) 特開 昭54−127859(JP,A) 特開 昭52−62157(JP,A) 特開 平4−200833(JP,A) 特開 昭51−76162(JP,A) 特公 昭45−8339(JP,B1) (58)調査した分野(Int.Cl.7,DB名) B21J 1/00 - 13/14 B21J 17/00 - 19/04 B21K 1/00 - 31/00 B21C 23/00 - 35/06 Continuation of the front page (56) References JP-A-2-247036 (JP, A) JP-A-54-127859 (JP, A) JP-A-52-62157 (JP, A) JP-A-4-200833 (JP) JP-A-51-76162 (JP, A) JP-B-45-8339 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1/00-31/00 B21C 23/00-35/06

Claims (6)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 パンチとダイスとノックアウトピンとを
    有する成形装置を用い被成形材を鍔部と筒状凸部とを有
    する鍔付筒状部材に成形する鍔付筒状部材の成形方法に
    おいて、前記被成形材の前記鍔部となる部分の下面を常
    に前記ダイスの上面で支持しかつ前記被成形材の前記筒
    状凸部となる部分の外周面全面を常に前記ダイスの成形
    穴によって拘束するよう前記ダイスを移動させながら、
    前記パンチと前記ノックアウトピンとの間で前記被成形
    材の前記筒状凸部の底部となる部分を挟圧して後方押出
    し加工することを特徴とする鍔付筒状部材の成形方法。
    1. A method for forming a flanged cylindrical member, comprising forming a material to be formed into a flanged cylindrical member having a flange portion and a cylindrical convex portion using a molding device having a punch, a die, and a knockout pin. The lower surface of the portion serving as the flange portion of the molding material is always supported by the upper surface of the die, and the entire outer peripheral surface of the portion serving as the cylindrical convex portion of the molding material is always restrained by the molding hole of the die. While moving the dice,
    A method for forming a flanged cylindrical member, comprising pressing a portion of the material to be formed at the bottom of the cylindrical convex portion between the punch and the knockout pin and extruding backward.
  2. 【請求項2】 前記後方押出し加工を行う前に前記パン
    チと前記ダイスとを用いて前記被成形材を挟圧し前記鍔
    付筒上部材の筒状凸部より高さの低い筒状凸部を予備成
    形することを特徴とする請求項1記載の鍔付筒状部材の
    成形方法。
    2. Prior to performing the backward extrusion process, the punched material and the die are used to squeeze the molding material to form a cylindrical convex portion having a height lower than that of the flanged cylindrical upper member. The method for forming a flanged tubular member according to claim 1, wherein the forming is performed by preforming.
  3. 【請求項3】 前記予備成形は、前記パンチと前記ノッ
    クアウトピンとの間に前記被成形材を挟圧しながら前記
    パンチと前記ノックアウトピンとを前記ダイスに対して
    押し下げることによって行うことを特徴とする請求項2
    記載の鍔付筒状部材の成形方法。
    3. The preforming is performed by pressing down the punch and the knockout pin with respect to the die while pressing the material to be formed between the punch and the knockout pin. 2
    A method for forming a flanged tubular member according to the above.
  4. 【請求項4】 前記予備成形は、前記被成形材に剪断及
    び張出し加工を施すことにより行うことを特徴とする請
    求項2記載の鍔付筒状部材の成形方法。
    4. The method according to claim 2, wherein the preforming is performed by subjecting the material to be formed to shearing and stretching.
  5. 【請求項5】 パンチとダイスとノックアウトピンとを
    有し、パンチの移動により被成形材を鍔部と筒状凸部と
    を有する鍔付筒状部材に成形する鍔付筒状部材の成形装
    置において、前記ダイスを前記パンチの少なくとも反挿
    入方向に移動可能に支持する手段と、前記ノックアウト
    ピンを前記パンチの少なくとも挿入方向に移動可能に支
    持する手段と、前記ノックアウトピンを前記パンチの反
    挿入方向に付勢する第1の付勢手段とを有することを特
    徴とする鍔付筒状部材の成形装置。
    5. An apparatus for forming a flanged cylindrical member having a punch, a die, and a knockout pin, wherein the punch is moved to form a material to be formed into a flanged cylindrical member having a flange portion and a cylindrical convex portion. Means for movably supporting the die in at least the direction of insertion of the punch, means for movably supporting the knockout pin in at least the direction of insertion of the punch, and moving the knockout pin in the direction of anti-insertion of the punch. An apparatus for forming a flanged cylindrical member, comprising: a first urging means for urging.
  6. 【請求項6】 前記ダイスを前記パンチの反挿入方向に
    付勢する第2の付勢手段をさらに有することを特徴とす
    る請求項記載の鍔付筒状部材の成形装置。
    6. The apparatus according to claim 5 , further comprising a second urging unit for urging the die in a direction opposite to the insertion direction of the punch.
JP11891492A 1992-05-12 1992-05-12 Forming method and forming apparatus for tubular member with flange Expired - Fee Related JP3153327B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11891492A JP3153327B2 (en) 1992-05-12 1992-05-12 Forming method and forming apparatus for tubular member with flange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11891492A JP3153327B2 (en) 1992-05-12 1992-05-12 Forming method and forming apparatus for tubular member with flange

Publications (2)

Publication Number Publication Date
JPH05317955A JPH05317955A (en) 1993-12-03
JP3153327B2 true JP3153327B2 (en) 2001-04-09

Family

ID=14748303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11891492A Expired - Fee Related JP3153327B2 (en) 1992-05-12 1992-05-12 Forming method and forming apparatus for tubular member with flange

Country Status (1)

Country Link
JP (1) JP3153327B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006212703A (en) * 2005-01-07 2006-08-17 Seiko Epson Corp Device and method for forming shaft
KR101064303B1 (en) * 2009-04-29 2011-09-14 일진컴포지트 주식회사 Extruder Apparatus for Aluminum container
CN102029301B (en) * 2010-10-22 2012-04-11 南京迪威尔重型锻造股份有限公司 Heat backward extrusion molding process of large-sized cup-shaped piece
CN101972792B (en) * 2010-10-22 2012-01-25 南京迪威尔重型锻造股份有限公司 Hot reverse-extrusion forming mold for large cup shell

Also Published As

Publication number Publication date
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