JPH0813398B2 - Flange member plastic working method - Google Patents
Flange member plastic working methodInfo
- Publication number
- JPH0813398B2 JPH0813398B2 JP1883191A JP1883191A JPH0813398B2 JP H0813398 B2 JPH0813398 B2 JP H0813398B2 JP 1883191 A JP1883191 A JP 1883191A JP 1883191 A JP1883191 A JP 1883191A JP H0813398 B2 JPH0813398 B2 JP H0813398B2
- Authority
- JP
- Japan
- Prior art keywords
- pressing tool
- hole
- inner peripheral
- flange member
- plate
- 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
【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、フランジ部材の塑性加
工方法に係わり、特に、ボス部の肉厚がフランジ部の肉
厚より大きいフランジ部材を塑性加工により形成するた
めのフランジ部材の塑性加工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic working method for a flange member, and more particularly to a plastic working method for forming a flange member in which the wall thickness of the boss portion is larger than the wall thickness of the flange portion by plastic working. Regarding the method.
【０００２】[0002]
【従来の技術】従来、ボス部の肉厚がフランジ部の肉厚
より大きいフランジ部材を塑性加工により形成する方法
としては、例えば、図６あるいは図７に示すようなもの
が知られている。すなわち、図６の方法では、絞り成形
あるいはバーリング成形により、（ａ）に示すように、
ボス部１１の肉厚がフランジ部１３の肉厚とほぼ同様の
中間素材１５が形成され、（ｂ）に示すように、この中
間素材１５のボス部１１を、パンチ１７，１９とダイ２
１とにより圧縮成形することにより、ボス部２３の肉厚
がフランジ部２５の肉厚より大きいフランジ部材２７が
形成される。2. Description of the Related Art Heretofore, as a method of forming a flange member by plastic working in which the thickness of the boss portion is larger than the thickness of the flange portion, for example, a method as shown in FIG. 6 or 7 is known. That is, in the method of FIG. 6, by drawing or burring, as shown in (a),
An intermediate material 15 is formed in which the wall thickness of the boss portion 11 is substantially the same as the wall thickness of the flange portion 13. As shown in (b), the boss portion 11 of the intermediate material 15 is formed into the punches 17 and 19 and the die 2.
By performing compression molding with 1, the flange member 27 in which the wall thickness of the boss portion 23 is larger than the wall thickness of the flange portion 25 is formed.
【０００３】また、図７の方法では、（ａ）に示すよう
な丸棒状の素材２９が、鍛造により、（ｂ），（ｃ），
（ｄ）と順次薄くされ、（ｅ）に示すように、ボス部３
１の肉厚がフランジ部３３の肉厚より大きいフランジ部
材３５が形成される。Further, in the method shown in FIG. 7, a round bar-shaped material 29 as shown in (a) is forged into (b), (c),
As shown in (e), the boss 3 is thinned in sequence with (d).
The flange member 35 in which the wall thickness of 1 is larger than the wall thickness of the flange portion 33 is formed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、図６に
示した、圧縮成形によるフランジ部材の塑性加工方法で
は、ボス部１１の肉厚の増加量が大きい時、あるいは、
圧縮成形前のボス部１１の高さが高い時には、座屈が発
生し、ボス部２３の内壁または外壁に皺が寄る欠陥が発
生するため、極めて少ない肉厚増加率で、ボス部２３の
高さが低いフランジ部材にしか採用できないという問題
があった。However, in the plastic working method of the flange member by compression molding shown in FIG. 6, when the increase in the thickness of the boss portion 11 is large, or
When the height of the boss portion 11 before compression molding is high, buckling occurs, and wrinkles are generated on the inner wall or the outer wall of the boss portion 23. Therefore, the height of the boss portion 23 can be increased at an extremely small increase rate. There is a problem that it can be used only for a flange member having a low height.
【０００５】また、ボス部１１を圧縮すると、フランジ
部２５に素材が流動しようとするため、これを防止する
ためには、かなり強い拘束力で、フランジ部２５を拘束
する等の対策が必要であった。一方、図７に示した、鍛
造によるフランジ部材の塑性加工方法では、丸棒状の素
材２９を潰してフランジ部３３を形成するため、鍛造に
膨大なエネルギが必要になるとともに、工程数が多く、
焼鈍回数も多く、コストが増大するという問題があっ
た。When the boss portion 11 is compressed, the material tends to flow into the flange portion 25. Therefore, in order to prevent this, it is necessary to take measures such as restraining the flange portion 25 with a considerably strong restraining force. there were. On the other hand, in the plastic working method of the flange member by forging shown in FIG. 7, since the round bar-shaped material 29 is crushed to form the flange portion 33, enormous energy is required for forging, and the number of steps is large.
There was a problem that the number of times of annealing was large and the cost was increased.
【０００６】本発明は、上記のような問題を解決したも
ので、ボス部の肉厚がフランジ部の肉厚より大きいフラ
ンジ部材を、容易，確実に形成することのできるフラン
ジ部材の塑性加工方法を提供することを目的とする。The present invention solves the above problems, and a method of plastically processing a flange member capable of easily and reliably forming a flange member in which the boss portion has a wall thickness greater than that of the flange portion. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】請求項１のフランジ部材
の塑性加工方法は、第１穴部の形成される第１押圧工具
と、穴部が形成されず、あるいは、前記第１穴部よりも
小さい径の第２穴部が前記第１穴部の内側となる位置に
形成される第２押圧工具との間に、前記第１穴部より小
さい貫通孔の形成される板状素材を配置し、前記第１押
圧工具と第２押圧工具により、板状素材の貫通孔の廻り
の内周部を残したフランジ部となる部分を据え込み成形
し、内周部の肉厚をフランジ部の肉厚より大とするとと
もに、前記第１押圧工具と第２押圧工具の成形部の面積
の違いにより板状素材の内周部を第１押圧工具側に立ち
上げる予備ボス成形を行う据え込み工程と、この据え込
み工程により得られた中間素材をバーリング成形または
サイジング成形し、板状素材の内周部により形成される
ボス部の肉厚が、フランジ部の肉厚よりも大きいフラン
ジ部材を得る成形工程とを有するものである。According to a first aspect of the present invention, there is provided a plastic working method for a flange member, comprising: a first pressing tool having a first hole and a hole not formed; A plate-shaped material having a through hole smaller than the first hole is provided between the second pressing tool formed at a position where the second hole having a smaller diameter is located inside the first hole. Then, the first pressing tool and the second pressing tool upset a portion of the plate-shaped material, which is a flange portion that remains the inner peripheral portion around the through-hole, and the thickness of the inner peripheral portion is set to the flange portion. An upsetting step of preliminarily forming a boss that is thicker than the wall thickness and raises the inner peripheral portion of the plate-shaped material to the first pressing tool side due to the difference in the area of the forming portion of the first pressing tool and the second pressing tool. And burring or sizing the intermediate material obtained by this upsetting process. Thick boss portion formed by the inner peripheral portion of the plate-like material, and has a molding step of obtaining a large flange member than the thickness of the flange portion.
【０００８】 請求項２のフランジ部材の塑性加工方法
は、請求項１の据え込み工程において、板状素材の内周
部の内径方向への伸びを抑制する段部を形成した第２押
圧工具を使用し、板状素材の内周部の予備ボス成形によ
る立ち上げを大きくするものである。請求項３のフラン
ジ部材の塑性加工方法は、請求項１の据え込み工程にお
いて、第１押圧工具の第１穴部に対応する部分に凹部を
形成した第２押圧工具を使用し、中間素材の内周部のコ
ーナ部の肉厚をフランジ部の肉厚よりも大きく形成し、
成形工程におけるコーナ部の剛性を増大するとともに、
コーナ部の逃げ空間を減少するものである。According to a second aspect of the present invention, there is provided a plastic working method for a flange member, comprising: in the upsetting step of the first aspect, a second pressing tool in which a step portion that suppresses expansion of an inner peripheral portion of the plate-shaped material in an inner diameter direction is formed. It is used to increase the startup of the inner peripheral portion of the plate-shaped material by preliminary boss molding. According to a third aspect of the present invention, in the plastic working method of the flange member, in the upsetting step according to the first aspect, a second pressing tool having a concave portion formed in a portion corresponding to the first hole portion of the first pressing tool is used. The inner peripheral corner is made thicker than the flange,
While increasing the rigidity of the corners in the molding process,
This is to reduce the escape space at the corners.
【０００９】[0009]
【作用】請求項１のフランジ部材の塑性加工方法では、
据え込み工程により、板状素材の内周部を残して、フラ
ンジ部となる部分が据え込み成形され、内周部の肉厚が
フランジ部の肉厚より大とされ、同時に、第１押圧工具
と第２押圧工具の成形部の面積の違いにより板状素材の
内周部を第１押圧工具側に立ち上げる予備ボス成形が行
われ、この後、成形工程において、板状素材の内周部に
より形成されるボス部の肉厚が、フランジ部の肉厚より
も大きいフランジ部材が成形される。In the plastic working method of the flange member according to claim 1,
By the upsetting process, the flange portion is upset while leaving the inner peripheral portion of the plate-shaped material, and the wall thickness of the inner peripheral portion is made larger than the wall thickness of the flange portion, and at the same time, the first pressing tool. And the second pressing tool, the preliminary boss forming is performed to raise the inner peripheral portion of the plate-shaped material to the first pressing tool side due to the difference in the area of the forming portion. After that, in the forming step, the inner peripheral portion of the plate-shaped material is formed. A flange member is formed in which the wall thickness of the boss portion formed by is larger than the wall thickness of the flange portion.
【００１０】請求項２のフランジ部材の塑性加工方法で
は、段部により、板状素材の内周部の内径方向への伸び
が抑制され、板状素材の内周部の予備ボス成形による立
ち上げが大きくされる。請求項３のフランジ部材の塑性
加工方法では、中間素材の内周部のコーナー部の肉厚が
フランジ部の肉厚よりも大きく形成され、成形工程にお
けるコーナー部の剛性が増大され、また、コーナー部の
逃げ空間が減少される。In the plastic working method of the flange member according to the second aspect, the step portion suppresses the inner peripheral portion of the plate-shaped material from extending in the inner diameter direction, and the inner peripheral portion of the plate-shaped material is raised by preliminary boss forming. Is increased. In the flange member plastic working method according to claim 3, the thickness of the corner portion of the inner peripheral portion of the intermediate material is formed to be larger than the thickness of the flange portion, the rigidity of the corner portion in the molding step is increased, and the corner portion is increased. The escape space of the part is reduced.
【００１１】[0011]
【実施例】以下、本発明の詳細を図面を用いて実施例に
ついて説明する。図１は、本発明のフランジ部材の塑性
加工方法の一実施例において、据え込み工程に使用され
る塑性加工装置を示すもので、図において、符号３７，
３９は、パンチからなる第１押圧工具と第２押圧工具を
示している。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a plastic working apparatus used in an upsetting step in an embodiment of the plastic working method for a flange member according to the present invention.
39 has shown the 1st pressing tool and the 2nd pressing tool which consist of a punch.
【００１２】第１押圧工具３７には、直径ｄ1 の第１穴
部４１が形成されている。また、第２押圧工具３９に
は、第１穴部４１より小径の直径ｄ2 の第２穴部４３
が、第１穴部４１の内側となる位置に形成されている。
さらに、この実施例では、第１押圧工具３７の中心に
は、板状素材４５の中心に形成される貫通孔４７に挿通
されるマンドレル４９が配置されている。The first pressing tool 37 is formed with a first hole portion 41 having a diameter d 1 . Further, the second pressing tool 39 has a second hole portion 43 having a diameter d 2 smaller than that of the first hole portion 41.
Is formed at a position inside the first hole portion 41.
Further, in this embodiment, at the center of the first pressing tool 37, a mandrel 49 inserted into a through hole 47 formed at the center of the plate-shaped material 45 is arranged.
【００１３】図２は、据え込み工程後の成形工程に使用
される塑性加工装置を示すもので、図において、符号５
１はパンチを、符号５３はダイを示しており、符号５５
はバーリング成形用のパンチを示している。以上のよう
に構成された装置を使用して、本発明のフランジ部材の
塑性加工方法の一実施例が以下述べるようにして行われ
る。FIG. 2 shows a plastic working apparatus used in the forming step after the upsetting step.
Reference numeral 1 indicates a punch, reference numeral 53 indicates a die, and reference numeral 55
Indicates a punch for burring. An embodiment of the plastic working method of the flange member of the present invention is performed as described below by using the apparatus configured as described above.
【００１４】すなわち、本発明方法では、先ず、図１に
示したように、第１押圧工具３７と第２押圧工具３９と
の間に、予め貫通孔４７の形成された板状素材４５が配
置される。この後、第２押圧工具３９を第１押圧工具３
７側に移動し、第２押圧工具３９を板状素材４５に押圧
することにより、板状素材４５の貫通孔４７と、第１押
圧工具３７の第１穴部４１の内側との間に形成される内
周部５７を残して、フランジ部５９となる部分が据え込
み成形される。That is, in the method of the present invention, first, as shown in FIG. 1, a plate-like material 45 having a through hole 47 formed in advance is arranged between the first pressing tool 37 and the second pressing tool 39. To be done. After this, the second pressing tool 39 is moved to the first pressing tool 3
7 side and presses the second pressing tool 39 against the plate-shaped material 45 to form between the through hole 47 of the plate-shaped material 45 and the inside of the first hole portion 41 of the first pressing tool 37. The portion to be the flange portion 59 is upset-molded, leaving the inner peripheral portion 57 formed.
【００１５】これにより、板状素材４５のフランジ部５
９の肉厚のみが、肉厚ｔ1 からｔ2 に減少され、内周部
５７の肉厚がフランジ部５９の肉厚より大とされる。そ
して、この時同時に、第１押圧工具３７と第２押圧工具
３９の成形部の面積の違いにより板状素材４５の内周部
５７が第１押圧工具３７側に高さＨ立ち上げられ、予備
ボス成形が行われる。As a result, the flange portion 5 of the plate material 45 is
Only the wall thickness of 9 is reduced from the wall thickness t 1 to t 2, and the wall thickness of the inner peripheral portion 57 is made larger than the wall thickness of the flange portion 59. At this time, at the same time, the inner peripheral portion 57 of the plate-shaped material 45 is raised to the first pressing tool 37 by the height H due to the difference in the area of the forming portion between the first pressing tool 37 and the second pressing tool 39. Boss molding is performed.
【００１６】すなわち、板状素材４５における第１押圧
工具３７側の受圧部面積に対して、第２押圧工具３９側
の受圧部面積が大きくなり、この受圧部面積の差によ
り、支点の違いによる曲げ効果が生じ、据え込みにより
内周方向に排除された素材は、斜め下方へと流動し、こ
の結果、内周部５７が立ち上がり、内周部６１とフラン
ジ部５９に肉厚差が形成されると同時に、予備ボス成形
が行われる。That is, the area of the pressure receiving portion on the side of the second pressing tool 39 is larger than the area of the pressure receiving portion on the side of the first pressing tool 37 in the plate-shaped material 45, and due to the difference in the area of this pressure receiving portion, there is a difference in the fulcrum. The material that has a bending effect and is removed in the inner peripheral direction by upsetting flows obliquely downward, and as a result, the inner peripheral portion 57 rises and a difference in wall thickness is formed between the inner peripheral portion 61 and the flange portion 59. At the same time, preliminary boss molding is performed.
【００１７】この後、この据え込み工程により得られた
中間素材６３が、図２に示したように、ダイ５３とパン
チ５１との間に収容され、バーリング成形用のパンチ５
５を下方に向けて移動することにより、中間素材６３の
内周部６１が、バーリング成形され、内周部６１がパン
チ５５とダイ５３との間の間隙寸法ｔに成形され、ボス
部６５の肉厚ｔが、フランジ部５９の肉厚ｔ2 よりも大
きいフランジ部材６７がバーリング成形される。Thereafter, the intermediate material 63 obtained by this upsetting step is accommodated between the die 53 and the punch 51, as shown in FIG. 2, and the punch 5 for burring is formed.
5 is moved downward, the inner peripheral portion 61 of the intermediate material 63 is burring-molded, the inner peripheral portion 61 is molded to have a gap dimension t between the punch 55 and the die 53, and the boss portion 65 is formed. The flange member 67 whose wall thickness t is larger than the wall thickness t 2 of the flange portion 59 is burred.
【００１８】しかして、以上述べたフランジ部材の塑性
加工方法では、第１穴部４１の形成される第１押圧工具
３７と、第１穴部４１よりも小さい径の第２穴部４３が
第１穴部４１の内側となる位置に形成される第２押圧工
具３９との間に、第１穴部４１より小さい貫通孔４７の
形成される板状素材４５を配置し、第１押圧工具３７と
第２押圧工具３９により、板状素材４５の貫通孔４７の
廻りの内周部５７を残したフランジ部５９となる部分を
据え込み成形し、内周部６１の肉厚をフランジ部５９の
肉厚より大とするとともに、第１押圧工具３７と第２押
圧工具３９の成形部の面積の違いにより板状素材４５の
内周部５７を第１押圧工具３７側に立ち上げる予備ボス
成形を行う据え込み工程と、この据え込み工程により得
られた中間素材６３をバーリング成形し、板状素材４５
の内周部６１により形成されるボス部６５の肉厚が、フ
ランジ部５９の肉厚よりも大きいフランジ部材６７を得
る成形工程とにより、フランジ部材６７を塑性加工する
ようにしたので、ボス部６５の肉厚がフランジ部５９の
肉厚より大きいフランジ部材６７を、容易，確実に形成
することが可能となる。However, in the above-described plastic working method for the flange member, the first pressing tool 37 in which the first hole portion 41 is formed and the second hole portion 43 having a diameter smaller than that of the first hole portion 41 are provided. A plate-shaped material 45 having a through hole 47 smaller than the first hole 41 is arranged between the first pressing tool 37 and the second pressing tool 39 formed at the position inside the first hole 41. With the second pressing tool 39, the portion of the plate-shaped material 45, which becomes the flange portion 59 around the through hole 47, which remains the inner peripheral portion 57, is upset, and the thickness of the inner peripheral portion 61 is set to the flange portion 59. Preliminary boss forming in which the inner peripheral portion 57 of the plate-shaped material 45 is raised to the first pressing tool 37 side due to the difference in the area of the forming portion of the first pressing tool 37 and the second pressing tool 39 while making it larger than the wall thickness. Upsetting process to be performed and intermediate material 6 obtained by this upsetting process Was burring, plate material 45
Since the boss portion 65 formed by the inner peripheral portion 61 has a wall thickness larger than that of the flange portion 59, the flange member 67 is plastically worked by a molding step. The flange member 67 in which the wall thickness of 65 is larger than the wall thickness of the flange portion 59 can be easily and surely formed.
【００１９】すなわち、以上述べたフランジ部材の塑性
加工方法では、第１押圧工具３７と第２押圧工具３９と
を使用して、板状素材４５を据え込み成形して、フラン
ジ部５９と内周部６１との肉厚差を形成するようにした
ので、非常に容易にボス部６５の肉厚がフランジ部５９
の肉厚より大きいフランジ部材６７を形成することがで
きる。That is, in the above-described plastic working method of the flange member, the plate material 45 is upset formed using the first pressing tool 37 and the second pressing tool 39, and the flange portion 59 and the inner circumference are formed. Since the difference in thickness from the portion 61 is formed, the thickness of the boss portion 65 can be very easily adjusted to the flange portion 59.
It is possible to form the flange member 67 that is thicker than the wall thickness.
【００２０】また、据え込み工程において、予備ボス成
形が行われるため、次工程のバーリング成形が非常に容
易となる。さらに、この実施例では、板状素材４５から
の据え込みによりフランジ部材６７を形成するため、棒
材を鍛造する場合に比較して、非常に少ないエネルギで
加工することができ、また、据え込み率も小さいため、
荷重も低くなる。In addition, since preliminary boss molding is performed in the upsetting step, burring molding in the next step becomes very easy. Further, in this embodiment, since the flange member 67 is formed by upsetting from the plate-shaped material 45, it is possible to process with very little energy as compared with the case of forging a bar material, and the upsetting. Because the rate is small,
The load is also low.
【００２１】図３は、本発明のフランジ部材の塑性加工
方法の他の実施例を示すもので、このフランジ部材の塑
性加工方法では、据え込み工程において、板状素材４５
の内周部５７の内径方向への伸びを抑制する段部６９を
形成した第２押圧工具３９が使用されている。また、段
部６９はテーパ状をしており、段部６９の位置は、第１
穴部４１の位置よりも内側に形成されている。FIG. 3 shows another embodiment of the plastic working method of the flange member of the present invention. In this plastic working method of the flange member, the plate material 45 is used in the upsetting step.
The second pressing tool 39 in which the step portion 69 that suppresses the inner peripheral portion 57 from expanding in the inner diameter direction is formed is used. Further, the step portion 69 has a tapered shape, and the position of the step portion 69 is the first
It is formed inside the position of the hole portion 41.
【００２２】そして、段部６９により、板状素材４５の
内周部５７の内径方向への伸びを抑制することにより、
板状素材４５の内周部５７の予備ボス成形による立ち上
げが大きくされている。なお、図３において、（ａ）は
据え込み成形前の状態を、（ｂ）は据え込み成形途中の
状態を、（ｃ）は第１押圧工具３７が下死点にある時の
状態を示している。The step 69 restrains the inner peripheral portion 57 of the plate-shaped material 45 from expanding in the inner diameter direction.
The rise of the inner peripheral portion 57 of the plate-shaped material 45 by preliminary boss molding is increased. 3, (a) shows the state before upsetting, (b) shows the state during upsetting, and (c) shows the state when the first pressing tool 37 is at the bottom dead center. ing.
【００２３】この実施例においても図１に示した実施例
とほぼ同様の効果を得ることができるが、この実施例で
は、板状素材４５の内周部５７の予備ボス成形による立
ち上げを容易に大きくすることができる。図４および図
５は、本発明のフランジ部材の塑性加工方法のさらに他
の実施例を示すもので、このフランジ部材の塑性加工方
法では、図４に示すように、据え込み工程において、中
間素材６３のフランジ部５９と内周部６１とのコーナー
部７１に相当する部分に凹部７３を形成した第２押圧工
具３９が使用され、据え込み成形時に、凹部７３に素材
を埋めることにより、中間素材６３のコーナー部７１の
肉厚がフランジ部５５の肉厚よりも大きく形成される。In this embodiment, almost the same effect as that of the embodiment shown in FIG. 1 can be obtained, but in this embodiment, the inner peripheral portion 57 of the plate-shaped material 45 can be easily started up by the preliminary boss forming. Can be made larger. 4 and 5 show still another embodiment of the plastic working method of the flange member of the present invention. In this plastic working method of the flange member, as shown in FIG. The second pressing tool 39 in which a recess 73 is formed in a portion corresponding to the corner portion 71 of the flange portion 59 and the inner peripheral portion 61 of 63 is used, and by filling the recess portion 73 with the material during upsetting, an intermediate material The corner portion 71 of 63 is formed to be thicker than the flange portion 55.
【００２４】そして、この凹部７３による中間素材６３
の肉厚増加部７５は、図５に示すように、バーリング成
形後のフランジ部材６７のフランジ部５９とボス部６５
とのコーナー部７７となるため、バーリング成形におけ
るコーナー部７７の剛性を容易に増大することができ
る。また、この実施例では、コーナー部７７の肉厚が増
大するため、バーリング成形によるコーナー部７７の逃
げ空間を容易に減少することができる。Then, the intermediate material 63 formed by the recess 73 is formed.
As shown in FIG. 5, the increased thickness portion 75 of the flange portion 59 and the boss portion 65 of the flange member 67 after the burring molding are performed.
Since it becomes the corner portion 77, the rigidity of the corner portion 77 in the burring molding can be easily increased. Further, in this embodiment, since the wall thickness of the corner portion 77 increases, it is possible to easily reduce the clearance space of the corner portion 77 due to the burring molding.
【００２５】なお、以上述べた実施例では、第１穴部４
１を円形にし、円形のボス部６５を形成した例について
説明したが、本発明はかかる実施例に限定されるもので
はなく、例えば、第１穴部を四角形等にし、四角形状等
のボス部を形成しても良いことは勿論である。また、以
上述べた実施例では、第１押圧工具３７を第２押圧工具
３９の下方に配置した例について説明したが、本発明は
かかる実施例に限定されるものではなく、第２押圧工具
を第１押圧工具の下方に配置しても良いことは勿論であ
る。In the embodiment described above, the first hole 4
Although the example in which 1 is circular and the circular boss portion 65 is formed has been described, the present invention is not limited to such an embodiment. For example, the first hole portion may be a quadrangle or the like, and the boss portion having a quadrangular shape or the like. Needless to say, it may be formed. Further, in the embodiment described above, an example in which the first pressing tool 37 is arranged below the second pressing tool 39 has been described, but the present invention is not limited to this embodiment, and the second pressing tool is Of course, it may be arranged below the first pressing tool.
【００２６】さらに、以上述べた実施例では、第２押圧
工具３９に第２穴部４３を形成した例について説明した
が、本発明はかかる実施例に限定されるものではなく、
必ずしも第２穴部を形成する必要がないことは勿論であ
る。また、以上述べた実施例では、中間素材６３をバー
リング成形してボス部６５を形成した例について説明し
たが、本発明はかかる実施例に限定されるものではな
く、サイジング成形してボス部を形成しても良いことは
勿論である。Furthermore, in the above-mentioned embodiment, an example in which the second hole portion 43 is formed in the second pressing tool 39 has been described, but the present invention is not limited to this embodiment.
Of course, it is not always necessary to form the second hole. Further, in the embodiment described above, the example in which the intermediate material 63 is burring-molded to form the boss portion 65 has been described, but the present invention is not limited to such an embodiment, and the boss portion is sized by sizing molding. Of course, it may be formed.
【００２７】[0027]
【発明の効果】以上述べたように、請求項１のフランジ
部材の塑性加工方法では、第１穴部の形成される第１押
圧工具と、穴部が形成されず、あるいは、第１穴部より
も小さい径の第２穴部が前記第１穴部の内側となる位置
に形成される第２押圧工具との間に、第１穴部より小さ
い貫通孔の形成される板状素材を配置し、第１押圧工具
と第２押圧工具により、板状素材の貫通孔の廻りの内周
部を残したフランジ部となる部分を据え込み成形し、内
周部の肉厚をフランジ部の肉厚より大とするとともに、
第１押圧工具と第２押圧工具の成形部の面積の違いによ
り板状素材の内周部を第１押圧工具側に立ち上げる予備
ボス成形を行う据え込み工程と、この据え込み工程によ
り得られた中間素材をバーリング成形またはサイジング
成形し、板状素材の内周部により形成されるボス部の肉
厚が、フランジ部の肉厚よりも大きいフランジ部材を得
る成形工程とにより、フランジ部材を塑性加工するよう
にしたので、ボス部の肉厚がフランジ部の肉厚より大き
いフランジ部材を、容易，確実に形成することが可能と
なる。As described above, according to the plastic working method of the flange member of the first aspect, the first pressing tool in which the first hole is formed and the hole is not formed, or the first hole is formed. A plate-shaped material having a through hole smaller than the first hole is arranged between the second pressing tool and a second pressing tool having a second hole having a smaller diameter than the first hole. Then, the first pressing tool and the second pressing tool upset the portion of the plate-shaped material that becomes the flange portion around the through hole around which the inner peripheral portion remains, and the thickness of the inner peripheral portion is changed to the thickness of the flange portion. While making it larger than the thickness,
The upsetting step of performing preliminary boss forming to raise the inner peripheral portion of the plate-shaped material to the first pressing tool side due to the difference in the area of the forming portion of the first pressing tool and the second pressing tool, and the upsetting step By burring or sizing the intermediate material to obtain a flange member in which the wall thickness of the boss formed by the inner peripheral portion of the plate-shaped material is greater than the wall thickness of the flange portion, the flange member is plastic Since the processing is performed, it is possible to easily and surely form the flange member in which the wall thickness of the boss portion is larger than the wall thickness of the flange portion.
【００２８】 請求項２のフランジ部材の塑性加工方法
では、請求項１の据え込み工程において、板状素材の内
周部の内径方向への伸びを抑制する段部を形成した第２
押圧工具を使用したので、板状素材の内周部の予備ボス
成形による立ち上げを容易に大きくすることができる。
請求項３のフランジ部材の塑性加工方法では、請求項１
のフランジ部材の塑性加工方法における据え込み工程に
おいて、第１押圧工具の第１穴部に対応する部分に凹部
を形成した第２押圧工具を使用し、中間素材の内周部の
コーナ部の肉厚をフランジ部の肉厚よりも大きく形成し
たので、成形工程におけるコーナ部の剛性を増大すると
ともに、コーナ部の逃げ空間を減少することが容易に可
能になるという利点がある。In the plastic working method of the flange member according to a second aspect of the present invention, in the upsetting step of the first aspect, a second step is provided in which a step portion that suppresses expansion of the inner peripheral portion of the plate-shaped material in the inner diameter direction is formed.
Since the pressing tool is used, it is possible to easily increase the startup of the inner peripheral portion of the plate-shaped material by preliminary boss molding.
According to the plastic working method of the flange member of claim 3,
In the upsetting step in the plastic working method of the flange member, the second pressing tool in which the concave portion is formed in the portion corresponding to the first hole portion of the first pressing tool is used, and the meat of the corner portion of the inner peripheral portion of the intermediate material is used. Since the thickness is formed larger than the wall thickness of the flange portion, there is an advantage that it is possible to increase the rigidity of the corner portion in the molding process and easily reduce the escape space of the corner portion.
【図１】本発明のフランジ部材の塑性加工方法の一実施
例の据え込み工程で使用される塑性加工装置を示す断面
図である。FIG. 1 is a sectional view showing a plastic working apparatus used in an upsetting step of an embodiment of a plastic working method for a flange member of the present invention.
【図２】本発明のフランジ部材の塑性加工方法の一実施
例のバーリング成形で使用される塑性加工装置を示す断
面図である。FIG. 2 is a cross-sectional view showing a plastic working apparatus used in burring molding of an embodiment of a plastic working method for a flange member of the present invention.
【図３】本発明のフランジ部材の塑性加工方法の他の実
施例の据え込み工程を示す説明図である。FIG. 3 is an explanatory view showing an upsetting step of another embodiment of the plastic working method of the flange member of the present invention.
【図４】本発明のフランジ部材の塑性加工方法のさらに
他の実施例の据え込み工程を示す説明図である。FIG. 4 is an explanatory view showing an upsetting step of still another embodiment of the plastic working method for the flange member of the present invention.
【図５】本発明のフランジ部材の塑性加工方法の他の実
施例のバーリング成形を示す説明図である。FIG. 5 is an explanatory diagram showing burring molding of another embodiment of the plastic working method of the flange member of the present invention.
【図６】従来のフランジ部材の塑性加工方法を示す説明
図である。FIG. 6 is an explanatory view showing a conventional plastic working method for a flange member.
【図７】従来のフランジ部材の塑性加工方法を示す説明
図である。FIG. 7 is an explanatory view showing a conventional plastic working method for a flange member.
３７ 第１押圧工具 ３９ 第２押圧工具 ４１ 第１穴部 ４３ 第２穴部 ４５ 板状素材 ４７ 貫通孔 ５９ フランジ部 ６３ 中間素材 ６５ ボス部 ６７ フランジ部材 ６９ 段部 ７１，７７ コーナー部 ７３ 凹部 37 1st pressing tool 39 2nd pressing tool 41 1st hole part 43 2nd hole part 45 Plate-shaped material 47 Through hole 59 Flange part 63 Intermediate material 65 Boss part 67 Flange member 69 Step part 71,77 Corner part 73 Recessed part
フロントページの続き (56)参考文献 特開 平４−190943（ＪＰ，Ａ) 特開 平２−147128（ＪＰ，Ａ) 特開 平４−258337（ＪＰ，Ａ) 特開 平４−258338（ＪＰ，Ａ) 特開 平４−46649（ＪＰ，Ａ) 特開 昭63−26230（ＪＰ，Ａ) 特開 昭54−62165（ＪＰ，Ａ)Continuation of front page (56) Reference JP-A-4-190943 (JP, A) JP-A-2-147128 (JP, A) JP-A-4-258337 (JP, A) JP-A-4-258338 (JP , A) JP-A-4-46649 (JP, A) JP-A-63-26230 (JP, A) JP-A-54-62165 (JP, A)
Claims (3)
穴部が形成されず、あるいは、前記第１穴部よりも小さ
い径の第２穴部が前記第１穴部の内側となる位置に形成
される第２押圧工具との間に、前記第１穴部より小さい
貫通孔の形成される板状素材を配置し、前記第１押圧工
具と第２押圧工具により、板状素材の貫通孔の廻りの内
周部を残したフランジ部となる部分を据え込み成形し、
内周部の肉厚をフランジ部の肉厚より大とするととも
に、前記第１押圧工具と第２押圧工具の成形部の面積の
違いにより板状素材の内周部を第１押圧工具側に立ち上
げる予備ボス成形を行う据え込み工程と、この据え込み
工程により得られた中間素材をバーリング成形またはサ
イジング成形し、板状素材の内周部により形成されるボ
ス部の肉厚が、フランジ部の肉厚よりも大きいフランジ
部材を得る成形工程とを有することを特徴とするフラン
ジ部材の塑性加工方法。1. A first pressing tool having a first hole portion,
No first hole is formed, or a second hole having a diameter smaller than that of the first hole is formed inside the first hole. A plate-shaped material in which a through hole smaller than a hole is formed is arranged, and by the first pressing tool and the second pressing tool, a portion to be a flange part that leaves an inner peripheral portion around the through hole of the plate-shaped material is formed. Upset molding,
The wall thickness of the inner peripheral portion is made larger than the wall thickness of the flange portion, and the inner peripheral portion of the plate-shaped material is moved toward the first pressing tool side due to the difference in the area of the forming portion of the first pressing tool and the second pressing tool. The upsetting process of starting up the preliminary boss and the intermediate material obtained by this upsetting process are burring formed or sizing formed, and the wall thickness of the boss formed by the inner peripheral part of the plate-shaped material is And a forming step of obtaining a flange member having a thickness larger than the wall thickness of the flange member.
部の内径方向への伸びを抑制する段部を形成した第２押
圧工具を使用し、板状素材の内周部の予備ボス成形によ
る立ち上げを大きくすることを特徴とする請求項１記載
のフランジ部材の塑性加工方法。2. Preliminary boss forming of the inner peripheral portion of the plate-shaped material by using a second pressing tool in which a step portion that suppresses expansion of the inner peripheral portion of the plate-shaped material in the inner diameter direction is used in the upsetting step. The plastic working method for a flange member according to claim 1, wherein the start-up is increased.
第１穴部に対応する部分に凹部を形成した第２押圧工具
を使用し、中間素材の内周部のコーナ部の肉厚をフラン
ジ部の肉厚よりも大きく形成し、成形工程におけるコー
ナ部の剛性を増大するとともに、コーナ部の逃げ空間を
減少することを特徴とする請求項１記載のフランジ部材
の塑性加工方法。3. In the upsetting step, a second pressing tool having a concave portion formed in a portion corresponding to the first hole portion of the first pressing tool is used, and the wall thickness of the corner portion of the inner peripheral portion of the intermediate material is flanged. The plastic working method for a flange member according to claim 1, wherein the flange member is formed to have a thickness larger than that of the flange portion to increase the rigidity of the corner portion in the molding step and reduce the escape space of the corner portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1883191A JPH0813398B2 (en) | 1991-02-12 | 1991-02-12 | Flange member plastic working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1883191A JPH0813398B2 (en) | 1991-02-12 | 1991-02-12 | Flange member plastic working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04258339A JPH04258339A (en) | 1992-09-14 |
| JPH0813398B2 true JPH0813398B2 (en) | 1996-02-14 |
Family
ID=11982511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1883191A Expired - Fee Related JPH0813398B2 (en) | 1991-02-12 | 1991-02-12 | Flange member plastic working method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0813398B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3003748B2 (en) * | 1993-05-31 | 2000-01-31 | 株式会社 ミツバ | Method for manufacturing rotor of magnet generator |
| JP2012215224A (en) * | 2011-03-31 | 2012-11-08 | Hitachi Automotive Systems Ltd | Cylinder member and manufacturing method therefor |
| JP6748149B2 (en) * | 2018-06-13 | 2020-08-26 | フタバ産業株式会社 | Bending member manufacturing method |
-
1991
- 1991-02-12 JP JP1883191A patent/JPH0813398B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04258339A (en) | 1992-09-14 |
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