JP3330311B2 - Method for forging a cylindrical housing having an outer peripheral flange - Google Patents
Method for forging a cylindrical housing having an outer peripheral flangeInfo
- Publication number
- JP3330311B2 JP3330311B2 JP30806897A JP30806897A JP3330311B2 JP 3330311 B2 JP3330311 B2 JP 3330311B2 JP 30806897 A JP30806897 A JP 30806897A JP 30806897 A JP30806897 A JP 30806897A JP 3330311 B2 JP3330311 B2 JP 3330311B2
- Authority
- JP
- Japan
- Prior art keywords
- peripheral flange
- outer peripheral
- diameter
- housing
- cylindrical
- 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
Links
Landscapes
- Forging (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば自動車の懸架装
置及び操舵装置に使用されるボールジョイント等の構成
部材である外周フランジを有する円筒状ハウジングの鍛
造成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forging a cylindrical housing having an outer peripheral flange, which is a constituent member such as a ball joint used for a suspension system and a steering system of an automobile.
【０００２】[0002]
【従来の技術】従来、ボールジョイントの構成部品であ
る外周フランジを有する円筒状ハウジングは、図４に示
す如き冷間鍛造工程で形成していた。つまり、所望する
ハウジング１３１の体積より若干多めの体積の円柱素材
１０１（図４の（ア））に冷間の押出し成形を施し、一
端に第一凹み１１４、他端に第一凹み１１４より深く凹
んだ第二凹み１１７を内周側に画成する円本体部１１５
と、第一凹み１１４と第二凹み１１７との間に設けられ
た底部１１３とからなる軸心断面Ｈ状の予備成形品１１
１（図４の（イ））を形成する。次に予備成形品１１１
の底部１１３中心付近を打ち抜き、内周に周状に予備内
周フランジ１２８を設けた中間成形品１２１（図４の
（ウ））を形成し、最後に、中間成形品１２１の両端側
からパンチで押圧し、円本体部１１５の第二凹み１１７
側端部を軸線方向に延出させるとともに円本体部１１５
の第一凹み１１４側端部を径方向外周に延出して外周フ
ランジ１３２を成形、これによりハウジング１３１（図
４の（エ））を形成していた。2. Description of the Related Art Conventionally, a cylindrical housing having an outer peripheral flange which is a component of a ball joint has been formed by a cold forging process as shown in FIG. That is, cold extrusion molding is performed on the columnar material 101 (FIG. 4A) having a volume slightly larger than the desired volume of the housing 131, and the first recess 114 is provided at one end and deeper than the first recess 114 at the other end. Circular body 115 that defines concave second recess 117 on the inner peripheral side
And a bottom part 113 provided between the first dent 114 and the second dent 117, and the preform 11 having an H-shaped cross section along the axial center.
1 (FIG. 4A). Next, the preform 111
In the vicinity of the center of the bottom 113, an intermediate molded product 121 ((c) in FIG. 4) having a peripheral inner peripheral flange 128 formed on the inner periphery is formed. And the second recess 117 of the circular main body 115
The side end portion extends in the axial direction and the circular main body portion 115
The outer peripheral flange 132 is formed by extending the end of the first dent 114 on the side of the first dent 114 toward the outer periphery in the radial direction, thereby forming the housing 131 (FIG. 4D).
【０００３】[0003]
【発明が解決しようとする課題】上述の如き冷間鍛造方
法の特に中間成形品１２１からハウジング１３１を形成
するとき、中間成形品１２１における円本体部１１５の
第一凹み１１４側端部を径方向外周に延出して外周フラ
ンジ１３２を成形するが、ここで鍛造肉は外周側に流
動、外周側に引っ張られるので、内周端部に欠肉Ｓが発
生することがある。また、パンチの押圧により、円本体
部１１５の第二凹み１１７側端部を軸線方向に、第一凹
み１１４側端部を径方向外周に延出させるが、ここで鍛
造肉両方向に規制されることなく流動するので、流動圧
は分散する。そのため、円本体部１１５の軸線方向端部
まで鍛造肉が充填されず、欠肉Ｒが発生することがあ
る。更に、上記両方向への鍛造肉の流動において、一方
端部、例えば第二凹み１１７側端部に先に鍛造肉が充填
されると、鍛造肉は他方第一凹み１１４側端部に流動す
る。ここで第一凹み１１４側端部への流動により、充填
された第二凹み１１７側の鍛造肉が第一凹み１１４側に
引っ張られ、内周フランジ１３８の付けね付近に欠肉Ｔ
が発生することがある。In the cold forging method as described above, particularly when the housing 131 is formed from the intermediate molded product 121, the end of the intermediate molded product 121 on the side of the first recess 114 of the circular main body portion 115 is placed in the radial direction. The outer peripheral flange 132 is formed by extending to the outer periphery. Here, the forged meat flows to the outer peripheral side and is pulled to the outer peripheral side, so that the underfill S may be generated at the inner peripheral end. The punch presses the end of the circular body 115 toward the second recess 117 in the axial direction and the end toward the first recess 114 to the outer periphery in the radial direction. Here, the forged meat is regulated in both directions. Flow without dispersing, the flow pressure is dispersed. For this reason, the forged meat is not filled up to the axial end of the circular main body 115, and the underfill R may be generated. Furthermore, in the flow of the forged meat in both directions, when one end, for example, the end of the second dent 117 is filled with the forged meat first, the forged meat flows to the other end of the first dent 114. Here, due to the flow toward the end of the first dent 114, the filled forged meat on the second dent 117 side is pulled toward the first dent 114, and the underfill T near the attachment of the inner peripheral flange 138.
May occur.
【０００４】このように鍛造成形では、鍛造肉の流動に
ともない外面に欠肉が発生することがある。そのため予
め外面に余肉を設け、鍛造成形後、切削加工で所望する
ハウジング１３１形状に仕上げる必要があり、多大なる
切削加工時間を要した。[0004] As described above, in the forging process, the outer surface may be underfilled with the flow of the forged meat. For this reason, it is necessary to provide extra space on the outer surface in advance, and after forging, to finish the desired housing 131 shape by cutting, which requires a great amount of cutting time.
【０００５】従って、本発明は上述の如き課題を解決
し、ハウジングに欠肉が発生することなく、加工時間の
増加を抑制する外周フランジを有する円筒状ハウジング
の鍛造成形方法を提供することを目的とする。Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a method for forging a cylindrical housing having an outer peripheral flange which suppresses an increase in machining time without occurrence of underfill in the housing. And
【０００６】[0006]
【課題を解決するための手段】本発明は以下のとおりで
ある。The present invention is as follows.
【０００７】所望するハウジングの体積より若干多めの
体積の円柱素材に冷間鍛造加工を施し、円柱又は円筒の
円本体部と円本体部に連続して外周側に周状に延出する
予備外周フランジを一端に有する予備成形品を形成する
第一工程と、予備成形品の中心付近を打ち抜き、内周側
に周状に延出する予備内周フランジを有する中間成形品
を形成する第二工程と、軸線予備外周フランジ側から円
本体部外径より小径の大径パンチ、軸線円本体部側から
大径パンチ外径より小径の小径パンチで押圧し、大径パ
ンチが予備外周フランジと円本体部との境界より円本体
部側に進出してハウジングを形成する第三工程とからな
る。 A column material having a slightly larger volume than a desired housing volume is subjected to cold forging, and a cylindrical or cylindrical circular main body portion and a spare outer periphery extending circumferentially to the outer peripheral side continuously to the circular main body portion. A first step of forming a preformed article having a flange at one end, and a second step of forming an intermediate formed article having a preformed inner peripheral flange which is punched around the center of the preformed article and extends circumferentially on the inner peripheral side. Pressing with a large-diameter punch smaller in diameter than the outer diameter of the circular main body from the axis outer peripheral flange side and a small-diameter punch smaller than the outer diameter of the large-diameter punch from the axial circular main body side, the large-diameter punch is A third step of forming a housing by advancing toward the circular body from the boundary with the part.
You.
【０００８】[0008]
【実施例】以下、本発明の実施例を図１乃至図３に基づ
いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【０００９】図１の（エ）は、本発明の鍛造成形方法に
より形成されるハウジング３１を表し、円筒状の円本体
部１５と、円本体部１５の一端端部外周に周状に延出す
る外周フランジ３２と、円本体部１５の外周フランジ３
２側内周に軸心に向かって延出する周状の内周フランジ
３８とからなる。ここで円本体部１５の外周フランジ３
２側に位置する第一円筒部４０の内径は、反外周フラン
ジ側に位置する第二円筒部３６の内径より大径である。FIG. 1 (D) shows a housing 31 formed by the forging method of the present invention, and extends circumferentially around the outer periphery of one end of the cylindrical main body 15 and one end of the circular main body 15. Outer peripheral flange 32 and outer peripheral flange 3 of circular main body 15
A circumferential inner peripheral flange 38 extending toward the axis is provided on the inner periphery on the two sides. Here, the outer peripheral flange 3 of the circular main body 15
The inner diameter of the first cylindrical portion 40 located on the second side is larger than the inner diameter of the second cylindrical portion 36 located on the side opposite to the outer peripheral flange.
【００１０】上記ハウジング３１の鍛造成形方法を図１
に基づいて説明する。FIG. 1 shows a forging method of the housing 31.
It will be described based on.
【００１１】まず、所望するハウジング３１の体積より
若干多めの体積の円柱素材１（図１の（ア））に冷間の
押出し成形を施し、一端に第一凹み１４、他端に第一凹
み１４より深く凹んだ第二凹み１７を内周側に画成する
円本体部１５と、第一凹み１４と第二凹み１７との間で
両凹み１４，１７を分割する底部１３と、円本体部１５
の第一凹み１４側外周から連続して周状に延出する予備
外周フランジ１２とからなる軸心断面Ｈ状の予備成形品
１１（図１の（イ））を形成する。次に予備成形品１１
の底部１３中心付近を打ち抜き、内周に周状に予備内周
フランジ２８を設けた中間成形品２１（図１の（ウ））
を形成し、最後に中間成形品２１の両端側からパンチで
押圧し、第二円筒部１６を軸線方向へ延出させるととも
に予備外周フランジ１２を外周側に周状に延出して外周
フランジ３２を成形、これによりハウジング（図４の
（エ））を形成していた。First, a cylindrical material 1 (FIG. 1A) having a volume slightly larger than a desired volume of the housing 31 is subjected to cold extrusion molding, and a first dent 14 is provided at one end and a first dent is provided at the other end. A circular body portion 15 defining a second recess 17 deeper than the inner recess 14 on the inner peripheral side; a bottom portion 13 dividing the recesses 14, 17 between the first recess 14 and the second recess 17; Part 15
A preform 11 (FIG. 1 (a)) having an H-shape cross-section is formed from a preparatory outer peripheral flange 12 continuously and circumferentially extending from the outer periphery of the first recess 14 side. Next, the preform 11
An intermediate molded product 21 in which a portion near the center of the bottom portion 13 is punched and a spare inner peripheral flange 28 is provided on the inner periphery in a circumferential shape ((c) in FIG. 1).
Finally, the intermediate molded product 21 is pressed from both ends by a punch to extend the second cylindrical portion 16 in the axial direction and extend the outer peripheral flange 12 circumferentially outward to form the outer peripheral flange 32. Molding, thereby forming a housing (FIG. 4D).
【００１２】この中間成形品２１からハウジング３１を
形成する工程を図２に基づいて説明する。A process for forming the housing 31 from the intermediate molded product 21 will be described with reference to FIG.
【００１３】５１は鍛造装置で、上型６１と下型８１と
からなる。Reference numeral 51 denotes a forging device, which comprises an upper die 61 and a lower die 81.
【００１４】上型６１は、その軸心に沿って中間成形品
２１の円本体部１５外径より小径の大径パンチ６２が配
置され、大径パンチ６２の先端には、所望するハウジン
グ３１の第一凹み１４内周形状と同一の外周形状を有す
る段状部６４とを有する。また、大径パンチ６２の外周
側にはリング状のパンチガイド６５、そして更にその外
周側にスペーサ６７が配置され、パンチガイド６５及び
スペーサ６７は上固定具６６により一体に組付けられ
る。The upper die 61 is provided with a large-diameter punch 62 having a diameter smaller than the outer diameter of the circular main body 15 of the intermediate molded product 21 along the axis thereof. The stepped portion 64 has the same outer peripheral shape as the inner peripheral shape of the first recess 14. A ring-shaped punch guide 65 is disposed on the outer peripheral side of the large-diameter punch 62, and a spacer 67 is further disposed on the outer peripheral side thereof. The punch guide 65 and the spacer 67 are assembled together by an upper fixture 66.
【００１５】下型８１は、内周上部にハウジング３１の
外周形状と同一形状を有する貫通孔９２を設けたダイ８
２が配置され、貫通孔９２には、大径パンチ６２に対向
し軸心に沿って延びる小径パンチ８４が配置される。小
径パンチ８４の先端はハウジング３１の第二凹み１７内
周形状と同一の外周形状を有し、小径パンチ８４とダイ
８２との間に上下方向に進退可能なノックアウトリング
８５が配置される。このノックアウトリング８５上端
面、ダイ８２内周面、及び小径パンチ８４外周面により
型彫空間８３が画成される。また、ダイ８２の下側には
円筒基材８６、その外周側にバックアップリング８７が
配置され、バックアップリング８７の外周上部に設けら
れた雄ネジ部８８にダイ８２に係合する下固定具８９の
雌ネジ部９０が螺合し、ダイ８２は円筒基材８６上に固
定される。The lower die 81 is provided with a die 8 having a through hole 92 having the same shape as the outer shape of the housing 31 at the upper portion of the inner circumference.
2, a small-diameter punch 84 facing the large-diameter punch 62 and extending along the axis is disposed in the through hole 92. The distal end of the small-diameter punch 84 has the same outer peripheral shape as the inner peripheral shape of the second recess 17 of the housing 31, and a knockout ring 85 that can move up and down in the vertical direction is arranged between the small-diameter punch 84 and the die 82. The upper surface of the knockout ring 85, the inner peripheral surface of the die 82, and the outer peripheral surface of the small-diameter punch 84 define a molding space 83. A cylindrical base material 86 is provided below the die 82, and a backup ring 87 is provided on the outer peripheral side of the cylindrical base material 86. And the die 82 is fixed on the cylindrical substrate 86.
【００１６】上記鍛造装置５１で中間成形品２１からハ
ウジング３１を形成するとき、図２左半部に示す如く、
上型６１を上方で待機させた状態で中間成形品２１を下
型８１の型彫空間８３に投入し、その後、上型６１を下
降させる。このときの成形状態を図３に基づいて説明す
ると、まず、図３の（ア）に示す如く、型彫空間８３に
投入された中間成形品２１は、その第二円筒部３６が小
径パンチ８４とダイ８２との間で画成される隙間に挿
嵌、固定される。この状態で、大径パンチ６２が中間成
形品２１の第一凹み１４側から進入、押し出し成形が開
始され、図３の（イ）に示す如く、予備外周フランジ１
２と円本体部１５との境界ｘ位置まで進む。このとき鍛
造肉は第二円筒部３６及び予備外周フランジ１２は各々
軸線又は径方向外周へ徐々に延出する。そして、大径パ
ンチ６２が境界ｘを過ぎて更に進入すると、大径パンチ
６２とダイ８２との隙間が小径パンチ８４とダイ８２と
の隙間より狭くなるため、予備外周フランジ１２側への
鍛造肉の流れが規制され、主に第二円筒部３６側に鍛造
肉が流れる。よって、図３の（ウ）に示す如く、第二円
筒部３６が所望の形状に成形される。その後、更に大径
パンチ６２が進入すると、主に予備外周フランジ１２側
に鍛造肉が流れ、図３の（エ）及び図２右半部に示す如
く、外周フランジ３２が所望の形状に成形される。When the housing 31 is formed from the intermediate molded product 21 by the forging device 51, as shown in the left half of FIG.
The intermediate molded product 21 is put into the engraving space 83 of the lower die 81 in a state where the upper die 61 is on standby above, and then the upper die 61 is lowered. The molding state at this time will be described with reference to FIG. 3. First, as shown in FIG. 3A, the second cylindrical part 36 of the intermediate molded product 21 put into the die-cutting space 83 has a small-diameter punch 84. Is inserted and fixed in a gap defined between the die 82 and the die 82. In this state, the large-diameter punch 62 enters from the first dent 14 side of the intermediate molded product 21 and extrusion molding is started, and as shown in FIG.
The process proceeds to the boundary x position between 2 and the circle main body 15. At this time, in the forged meat, the second cylindrical portion 36 and the preliminary outer peripheral flange 12 gradually extend to the outer periphery in the axis or radial direction, respectively. When the large-diameter punch 62 further enters beyond the boundary x, the gap between the large-diameter punch 62 and the die 82 becomes narrower than the gap between the small-diameter punch 84 and the die 82, so that the forged meat to the preliminary outer peripheral flange 12 side is used. Is regulated, and the forged meat flows mainly to the second cylindrical portion 36 side. Therefore, as shown in FIG. 3C, the second cylindrical portion 36 is formed into a desired shape. Thereafter, when the large-diameter punch 62 further enters, the forged meat flows mainly to the preliminary outer peripheral flange 12 side, and the outer peripheral flange 32 is formed into a desired shape as shown in FIG. 3D and the right half of FIG. You.
【００１７】よって、上記鍛造成形方法で形成した外周
フランジを有する円筒状ハウジング３１は、鍛造肉の流
れを調整することにより欠肉は発生しない。Accordingly, in the cylindrical housing 31 having the outer peripheral flange formed by the above-described forging method, no underfill is generated by adjusting the flow of the forged meat.
【００１８】尚、上記ハウジング３１の内周フランジ３
８内周は切削加工にて仕上げても良い。The inner peripheral flange 3 of the housing 31
8 may be finished by cutting.
【００１９】また、上記ハウジングを鍛造成形後、第二
円筒部３６の内周側を切削加工することにより第一円筒
部４０と第二円筒部３６の内径、肉厚の等しいハウジン
グを形成することもできる。Further, after forging the housing, the inner peripheral side of the second cylindrical portion 36 is cut to form a housing having the same inner diameter and thickness of the first cylindrical portion 40 and the second cylindrical portion 36. Can also.
【００２０】[0020]
【発明の効果】 以上のように本発明によれば、所望する
ハウジングの体積より若干多めの体積の円柱素材に冷間
鍛造加工を施し、円柱又は円筒の円本体部と円本体部に
連続して外周側に周状に延出する予備外周フランジを一
端に有する予備成形品を形成する第一工程と、予備成形
品の中心付近を打ち抜き、内周側に周状に延出する予備
内周フランジを有する中間成形品を形成する第二工程
と、軸線予備外周フランジ側から円本体部外径より小径
の大径パンチ、軸線円本体部側から大径パンチ外径より
小径の小径パンチで押圧し、大径パンチが予備外周フラ
ンジと円本体部との境界より円本体部側に進出してハウ
ジングを形成する第三工程とからなるため、形成した外
周フランジを有する円筒状ハウジングは、鍛造肉の流れ
を調整することにより欠肉は発生しないので、品質は良
好である。また、鍛造成形後の切削加工が最小限にでき
るため、加工時間の増加を抑制できる。 As described above, according to the present invention, a column material having a volume slightly larger than a desired housing volume is subjected to cold forging, and is continuously connected to a circular or cylindrical circular body and a circular body. A first step of forming a preform having at one end a preliminary outer peripheral flange extending circumferentially to the outer peripheral side, and a preliminary inner periphery circumferentially extending to the inner peripheral side by punching near the center of the preform. A second step of forming an intermediate molded product having a flange, and pressing with a large-diameter punch having a diameter smaller than the outer diameter of the circular main body portion from the axis outer peripheral flange side and a small-diameter punch having a diameter smaller than the outer diameter of the large-diameter punch from the axial line main body portion side. and Howe diameter punch is advanced to the circular body portion side of the boundary between the pre outer peripheral flange and the circular body portion
Since the process includes the third step of forming the jing, the cylindrical housing having the formed outer peripheral flange is excellent in quality because no underfill is generated by adjusting the flow of the forged meat. In addition, since cutting after forging can be minimized, an increase in processing time can be suppressed.
【図１】本発明の実施例による外周フランジを有する円
筒状ハウジングの鍛造成形方法を表す断面平面図であ
る。FIG. 1 is a sectional plan view illustrating a method for forging a cylindrical housing having an outer peripheral flange according to an embodiment of the present invention.
【図２】本発明の実施例で中間成形品から外周フランジ
を有する円筒状ハウジングを成形する鍛造工程を表し、
左半部は成形前、右半部は成形後の状態を表す部分断面
平面図である。FIG. 2 illustrates a forging process of forming a cylindrical housing having an outer peripheral flange from an intermediate molded product according to an embodiment of the present invention;
The left half is a partial sectional plan view showing a state before molding, and the right half is a partial sectional plan view showing a state after molding.
【図３】図２のＡ部を拡大し、中間成形品から外周フラ
ンジを有する円筒状ハウジングを成形する状態を（ア）
乃至（エ）で詳細に説明する部分断面平面図である。FIG. 3 is an enlarged view of part A of FIG. 2 showing a state in which a cylindrical housing having an outer peripheral flange is molded from an intermediate molded product (a).
It is a fragmentary sectional plan view explained in detail in (d).
【図４】従来例による外周フランジを有する円筒状ハウ
ジングの鍛造成形方法を表す断面平面図である。FIG. 4 is a sectional plan view showing a forging method of a cylindrical housing having an outer peripheral flange according to a conventional example.
１ 円柱素材 １１ 予備成形品 １２ 予備外周フランジ １５ 円本体部 ２１ 中間成形品 ２８ 予備内周フランジ ３１ ハウジング ３２ 外周フランジ ６２ 大径パンチ ８４ 小径パンチ ａ （円本体部）外径 ｘ 境 界 DESCRIPTION OF SYMBOLS 1 Column material 11 Preformed product 12 Preliminary outer peripheral flange 15 Circular main body 21 Intermediate molded product 28 Preliminary inner peripheral flange 31 Housing 32 Outer peripheral flange 62 Large diameter punch 84 Small diameter punch a (circular main body) outer diameter x boundary
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平10−180398（ＪＰ，Ａ) 特開 平10−202339（ＪＰ，Ａ) 特開 昭59−13540（ＪＰ，Ａ) 特開 昭54−117372（ＪＰ，Ａ) 特開 平９−29381（ＪＰ，Ａ) 実開 平５−76640（ＪＰ，Ｕ) (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 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-180398 (JP, A) JP-A-10-202339 (JP, A) JP-A-59-13540 (JP, A) JP-A-54 117372 (JP, A) JP-A-9-29381 (JP, A) JP-A-5-76640 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B21J 1/00-13 / 14 B21J 17/00-19/04 B21K 1/00-31/00
Claims (1)
る円筒状ハウジング（３１）の鍛造成形方法において、
所望するハウジング（３１）の体積より若干多めの体積
の円柱素材（１）に冷間鍛造加工を施し、円柱又は円筒
の円本体部（１５）と該円本体部（１５）に連続して外
周側に周状に延出する予備外周フランジ（１２）を一端
に有する予備成形品（１１）を形成する第一工程と、該
予備成形品（１１）の中心付近を打ち抜き、内周側に周
状に延出する予備内周フランジ（２８）を有する中間成
形品（２１）を形成する第二工程と、軸線予備外周フラ
ンジ（１２）側から円本体部（１５）外径（ａ）より小
径の大径パンチ（６２）、軸線円本体部（１５）側から
大径パンチ（６２）外径より小径の小径パンチ（８４）
で押圧し、前記大径パンチ（６２）が予備外周フランジ
（１２）と円本体部（１５）との境界（ｘ）より円本体
部側に進出してハウジング（３１）を形成する第三工程
とからなることを特徴とする外周フランジを有する円筒
状ハウジングの鍛造成形方法。1. A method for forging a cylindrical housing (31) having an outer peripheral flange (32) at one outer periphery thereof.
Cold forging is performed on a cylindrical material (1) having a slightly larger volume than the desired volume of the housing (31), and a cylindrical or cylindrical circular body (15) and an outer periphery are continuously formed on the circular body (15). A first step of forming a preform (11) having at one end a preparatory outer peripheral flange (12) extending circumferentially on the side, and punching the vicinity of the center of the preform (11); A second step of forming an intermediate molded product (21) having a spare inner peripheral flange (28) extending in the shape of a circle, and a diameter smaller than the outer diameter (a) of the circular main body part (15) from the axis outer peripheral flange (12) side. Large-diameter punch (62), small-diameter punch (84) smaller in diameter than the outer diameter of the large-diameter punch (62) from the side of the axial circle body (15).
A third step of forming the housing (31) by pushing the large diameter punch (62) forward from the boundary (x) between the preliminary outer peripheral flange (12) and the circular main body (15) toward the circular main body.
Forging method of a cylindrical housing having a peripheral flange, characterized by comprising a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30806897A JP3330311B2 (en) | 1997-09-30 | 1997-09-30 | Method for forging a cylindrical housing having an outer peripheral flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30806897A JP3330311B2 (en) | 1997-09-30 | 1997-09-30 | Method for forging a cylindrical housing having an outer peripheral flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11104782A JPH11104782A (en) | 1999-04-20 |
| JP3330311B2 true JP3330311B2 (en) | 2002-09-30 |
Family
ID=17976504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30806897A Expired - Fee Related JP3330311B2 (en) | 1997-09-30 | 1997-09-30 | Method for forging a cylindrical housing having an outer peripheral flange |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3330311B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4845243B2 (en) * | 1999-07-28 | 2011-12-28 | 株式会社カネミツ | Sheet metal member manufacturing method |
| KR101302614B1 (en) * | 2011-12-26 | 2013-09-03 | 주식회사 만도 | generating device for vehicle |
| CN108555200B (en) * | 2018-01-12 | 2019-12-24 | 上海裴椒汽车部件制造有限公司 | Cold heading process and cold heading die for oil pipe joint |
| CN114346149A (en) * | 2021-12-30 | 2022-04-15 | 苏州昆仑重型装备制造有限公司 | Large-scale step barrel forging die |
-
1997
- 1997-09-30 JP JP30806897A patent/JP3330311B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11104782A (en) | 1999-04-20 |
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