JPH07115108B2 - Plastic processing method for cup-shaped members - Google Patents
Plastic processing method for cup-shaped membersInfo
- Publication number
- JPH07115108B2 JPH07115108B2 JP3018829A JP1882991A JPH07115108B2 JP H07115108 B2 JPH07115108 B2 JP H07115108B2 JP 3018829 A JP3018829 A JP 3018829A JP 1882991 A JP1882991 A JP 1882991A JP H07115108 B2 JPH07115108 B2 JP H07115108B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- pressing tool
- cup
- outer peripheral
- shaped material
- 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)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、カップ状部材の塑性加
工方法に係わり、特に、縦壁部の肉厚が底部の肉厚より
大きいカップ状部材を塑性加工により形成するためのカ
ップ状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 cup-shaped member, and more particularly to a cup-shaped member for forming a cup-shaped member in which the wall thickness of the vertical wall is larger than the wall thickness of the bottom by plastic working. Regarding the plastic working method.
【０００２】[0002]
【従来の技術】従来、縦壁部の肉厚が底部の肉厚より大
きい有底筒状のカップ状部材を塑性加工により形成する
方法としては、例えば、図１４あるいは図１５に示すよ
うなものが知られている。すなわち、図１４の方法で
は、ダイ１１内に素材１３が収容され、この素材１３
を、パンチ１５により後方押し出しすることにより、縦
壁部１７の肉厚が底部１９の肉厚より大きいカップ状部
材２１が形成される。2. Description of the Related Art Conventionally, as a method of forming a bottomed tubular cup-shaped member by plastic working, the wall thickness of the vertical wall portion is larger than the wall thickness of the bottom portion, for example, as shown in FIG. 14 or FIG. It has been known. That is, in the method of FIG. 14, the material 13 is housed in the die 11, and the material 13
Is extruded rearward by the punch 15 to form the cup-shaped member 21 in which the wall thickness of the vertical wall portion 17 is larger than the wall thickness of the bottom portion 19.
【０００３】また、図１５の方法では、予め、絞り成形
により、底部１９とほぼ同様の肉厚を有する縦壁部２３
を形成された中間素材２５の縦壁部２３を、パンチ２
７，２９によりアプセット成形することにより、縦壁部
３１の肉厚が底部１９の肉厚より大きいカップ状部材３
３が形成される。Further, in the method of FIG. 15, the vertical wall portion 23 having a thickness substantially similar to that of the bottom portion 19 is previously formed by drawing.
The vertical wall portion 23 of the intermediate material 25 formed with
7 and 29, the cup-shaped member 3 in which the wall thickness of the vertical wall portion 31 is larger than the wall thickness of the bottom portion 19 is formed.
3 is formed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、図１４
に示した、後方押し出しによるカップ状部材の塑性加工
方法では、底部１９が縦壁部１７よりも薄くなるまでパ
ンチ１５を押圧すると、素材の流れにより、底部１９と
縦壁部１７とのコーナー部３５にデットメタル等の欠陥
が生じ易く、また、底部１９が薄くなると、パンチ１５
の面圧が極端に増大するという問題があり、さらに、特
に、断面減少率が大きい時には、パンチ１５の面圧が増
大し、成形不能になる場合も生じるという問題があっ
た。However, as shown in FIG.
In the plastic working method of the cup-shaped member by backward extrusion shown in FIG. 5, when the punch 15 is pressed until the bottom portion 19 becomes thinner than the vertical wall portion 17, the flow of material causes the corner portion between the bottom portion 19 and the vertical wall portion 17 to flow. If defects such as dead metal are liable to occur in 35 and the bottom 19 becomes thin, the punch 15
The surface pressure of the punch 15 is extremely increased, and further, particularly when the reduction rate of the cross section is large, the surface pressure of the punch 15 is increased, and there is a problem in that the molding becomes impossible.
【０００５】一方、図１５に示した、アプセット成形に
よるカップ状部材の塑性加工方法では、縦壁部３１の肉
厚の増加量が大きい時、あるいは、アプセット成形前の
縦壁部２３の高さが高い時には、座屈が発生し、縦壁部
３１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、縦壁部３１の高さが低いカ
ップ状部材にしか採用できないという問題があった。On the other hand, in the plastic working method of the cup-shaped member by upset molding shown in FIG. 15, when the increase amount of the wall thickness of the vertical wall portion 31 is large or the height of the vertical wall portion 23 before the upset molding is high. When the value is high, buckling occurs, and the inner wall or the outer wall of the vertical wall portion 31 has a wrinkle defect.
There has been a problem that the thickness increase rate is extremely small and it can be used only for a cup-shaped member in which the height of the vertical wall portion 31 is low.
【０００６】また、縦壁部３１を圧縮すると、底部１９
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、底部１９を拘束する等の対策
が必要であった。本発明は、上記のような問題を解決し
たもので、縦壁部の肉厚が底部の肉厚より大きいカップ
状部材を、容易，確実に形成することのできるカップ状
部材の塑性加工方法を提供することを目的とする。When the vertical wall portion 31 is compressed, the bottom portion 19
Since the material tends to flow, it is necessary to take measures such as restraining the bottom portion 19 with a considerably strong restraining force in order to prevent this. The present invention solves the above problems, and provides a method for plastically processing a cup-shaped member, which can easily and reliably form a cup-shaped member in which the wall thickness of the vertical wall portion is larger than the wall thickness of the bottom portion. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】請求項１のカップ状部材
の塑性加工方法は、対向配置され成形部外周寸法の異な
る小径押圧工具と大径押圧工具とを使用して、前記小径
押圧工具より大径の板状素材を、板状素材の外周部を残
して底部となる部分を据え込み成形し、外周部の肉厚を
底部の肉厚より大とするとともに、前記小径押圧工具と
大径押圧工具の成形部の面積の違いにより板状素材の外
周部を小径押圧工具側に立ち上げる予備絞りを行う据え
込み工程と、この据え込み工程により得られた中間素材
を絞り成形し、板状素材の外周部により形成される縦壁
部の肉厚が、底部の肉厚よりも大きいカップ状部材を得
る絞り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 cup-shaped member, wherein a small-diameter pressing tool and a large-diameter pressing tool which are arranged opposite to each other and have different outer peripheral dimensions of a molding portion are used. A large-diameter plate-shaped material is upset by molding the bottom part of the plate-shaped material, leaving the outer peripheral part of the plate-shaped material, and the thickness of the outer peripheral part is made larger than the thickness of the bottom part. Due to the difference in the area of the forming part of the pressing tool, the upsetting process that performs the preliminary drawing to raise the outer peripheral part of the plate-shaped material to the small-diameter pressing tool side, and the intermediate material obtained by this upsetting process are drawn and formed into a plate shape. And a drawing step for obtaining a cup-shaped member in which the wall thickness of the vertical wall portion formed by the outer peripheral portion of the material is larger than the wall thickness of the bottom portion.
【０００８】請求項２のカップ状部材の塑性加工方法
は、請求項１のカップ状部材の塑性加工方法における据
え込み工程において、中間素材の底部と外周部とのコー
ナー部に相当する部分に凹部を形成した大径押圧工具、
または、外周に沿って凹部の形成される小径押圧工具を
使用し、中間素材のコーナー部の肉厚を底部の肉厚より
も大きく形成し、絞り工程におけるコーナー部の剛性を
増大するとともに、絞り成形による外側コーナー部の逃
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 cup-shaped member, wherein in the upsetting step in the plastic working method for the cup-shaped member according to the first aspect, a recess is formed in a portion corresponding to a corner portion between the bottom and the outer peripheral portion of the intermediate material. Large diameter pressing tool,
Alternatively, by using a small-diameter pressing tool in which a concave portion is formed along the outer circumference, the thickness of the corner portion of the intermediate material is formed to be larger than the thickness of the bottom portion to increase the rigidity of the corner portion in the drawing process and It is intended to reduce the escape space at the outer corner portion due to molding.
【０００９】請求項３のカップ状部材の塑性加工方法
は、請求項１または２におけるカップ状部材の塑性加工
方法における据え込み工程において、板状素材の外周部
の径方向への伸びを抑制する段部を形成した大径押圧工
具を使用し、板状素材の外周部の予備絞りによる立ち上
げを大きくするものである。請求項４のカップ状部材の
塑性加工方法は、請求項１ないし３のいずれか１項記載
のカップ状部材の塑性加工方法における据え込み工程に
おいて、板状素材の外周部の径方向への伸びを抑制する
段部を形成した大径押圧工具を使用し、板状素材の据え
込み時に、板状素材に形成すべきボス部側に素材を流出
させ、ボス部の絞り深さを大きくするものである。According to a third aspect of the present invention, there is provided a plastic working method for a cup-shaped member, which suppresses radial expansion of the outer peripheral portion of the plate-shaped material in the upsetting step of the plastic working method for the cup-shaped member. A large-diameter pressing tool having a step is used to increase the startup of the outer peripheral portion of the plate-shaped material by preliminary drawing. According to a fourth aspect of the present invention, there is provided a plastic working method for a cup-shaped member according to any one of the first to third aspects, wherein in the upsetting step in the plastic working method for the cup-shaped member, the outer peripheral portion of the plate-shaped material is radially expanded. Using a large-diameter pressing tool with a stepped portion that suppresses the flow of material, when the plate-shaped material is set up, the material is caused to flow out to the boss side that should be formed in the plate-shaped material, and the drawing depth of the boss is increased. Is.
【００１０】請求項５のカップ状部材の塑性加工方法
は、請求項１ないし３のいずれか１項記載のカップ状部
材の塑性加工方法における据え込み工程において、板状
素材の外周部の径方向への伸びを抑制する段部を形成し
た大径押圧工具を使用し、板状素材の据え込み時に、板
状素材に形成すべきボス部の頂部を押さえることによ
り、ボス部の頂部のコーナー部の逃げ空間、あるいは、
ボス部の反対側の空間に板状素材を流出させるものであ
る。According to a fifth aspect of the present invention, there is provided a plastic working method for a cup-shaped member according to any one of the first to third aspects, wherein in the upsetting step in the plastic working method for the cup-shaped member, a radial direction of an outer peripheral portion of the plate-shaped material is provided. Using a large-diameter pressing tool that has a stepped portion that suppresses the expansion of the plate-shaped material, when pressing the plate-shaped material Escape space, or
The plate-shaped material is caused to flow into the space on the opposite side of the boss.
【００１１】[0011]
【作用】請求項１のカップ状部材の塑性加工方法では、
据え込み工程により、板状素材の外周部を残して、底部
となる部分が据え込み成形され、外周部の肉厚が底部の
肉厚より大とされ、同時に、小径押圧工具と大径押圧工
具の成形部の面積の違いにより板状素材の外周部を小径
押圧工具側に立ち上げる予備絞りが行われ、この後、絞
り工程において、板状素材の外周部により形成される縦
壁部の肉厚が、底部の肉厚よりも大きいカップ状部材が
絞り成形される。In the plastic working method of the cup-shaped member according to claim 1,
By the upsetting process, the bottom part is upset while leaving the outer peripheral part of the plate-shaped material, and the wall thickness of the outer peripheral part is made larger than the wall thickness of the bottom part, and at the same time, a small diameter pressing tool and a large diameter pressing tool. Pre-drawing is performed to raise the outer peripheral portion of the plate-shaped material to the small-diameter pressing tool side due to the difference in the area of the forming part, and after that, in the drawing process, the meat of the vertical wall formed by the outer peripheral portion of the plate-shaped material is A cup-shaped member having a thickness larger than the thickness of the bottom is formed by drawing.
【００１２】請求項２のカップ状部材の塑性加工方法で
は、据え込み工程において、中間素材の底部と外周部と
のコーナー部に相当する部分に凹部を形成した大径押圧
工具、または、外周に沿って凹部の形成される小径押圧
工具が使用され、中間素材のコーナー部の肉厚が底部の
肉厚よりも大きく形成され、絞り工程におけるコーナー
部の剛性が増大され、また、絞り成形による外側コーナ
ー部の逃げ空間が減少される。In the plastic working method of the cup-shaped member according to a second aspect of the present invention, in the upsetting step, a large-diameter pressing tool in which a concave portion is formed in a portion corresponding to a corner portion between the bottom portion and the outer peripheral portion of the intermediate material, or the outer peripheral portion is formed. A small-diameter pressing tool along which a concave portion is formed is used, and the wall thickness of the corner portion of the intermediate material is formed to be larger than the wall thickness of the bottom portion, increasing the rigidity of the corner portion in the drawing process, and the outside by drawing. The escape space at the corner is reduced.
【００１３】請求項３のカップ状部材の塑性加工方法で
は、据え込み工程において、板状素材の外周部の径方向
への伸びを抑制する段部を形成した大径押圧工具が使用
され、板状素材の外周部の予備絞りによる立ち上げが大
きくされる。請求項４のカップ状部材の塑性加工方法で
は、据え込み工程において、板状素材の外周部の径方向
への伸びを抑制する段部を形成した大径押圧工具が使用
され、板状素材の据え込み時に、板状素材に形成すべき
ボス部側に素材が流出され、ボス部の絞り深さが大きく
される。In the plastic working method of the cup-shaped member according to the third aspect, in the upsetting step, a large-diameter pressing tool having a step portion for suppressing the radial expansion of the outer peripheral portion of the plate-shaped material is used. The start-up by the preliminary drawing of the outer peripheral portion of the strip-shaped material is increased. In the plastic working method of the cup-shaped member according to claim 4, in the upsetting step, a large-diameter pressing tool in which a step portion that suppresses radial expansion of the outer peripheral portion of the plate-shaped material is formed is used. At the time of upsetting, the material flows out to the boss portion side to be formed in the plate-shaped material, and the drawing depth of the boss portion is increased.
【００１４】請求項５のカップ状部材の塑性加工方法で
は、据え込み工程において、板状素材の外周部の径方向
への伸びを抑制する段部を形成した大径押圧工具が使用
され、板状素材の据え込み時に、板状素材に形成すべき
ボス部の頂部を押さえることにより、ボス部の頂部のコ
ーナー部の逃げ空間、あるいは、ボス部の反対側の空間
に板状素材が流出される。In the plastic working method of the cup-shaped member according to the fifth aspect, in the upsetting step, a large-diameter pressing tool is used in which a step portion for suppressing radial expansion of the outer peripheral portion of the plate-shaped material is formed. By pressing the top of the boss that should be formed on the plate-shaped material during upsetting of the plate-shaped material, the plate-shaped material flows out into the escape space at the corner of the top of the boss, or into the space on the opposite side of the boss. It
【００１５】[0015]
【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、本発明のカップ状部材の塑性
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、対向配置され成形部外周寸法の異なる小径押圧
工具と大径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 process in an embodiment of the plastic working method for a cup-shaped member according to the present invention.
Reference numeral 39 denotes a small-diameter pressing tool and a large-diameter pressing tool that are arranged opposite to each other and have different outer peripheral dimensions of the molding portion.
【００１６】すなわち、小径押圧工具３７および大径押
圧工具３９は、上下のパンチからなり、小径押圧工具３
７の外径ｄ1 は、板状素材４１の外径Ａより小径とされ
ている。また、大径押圧工具３９の外径Ｄは、板状素材
４１の外径Ａより大径とされている。That is, the small diameter pressing tool 37 and the large diameter pressing tool 39 consist of upper and lower punches, and the small diameter pressing tool 3
The outer diameter d 1 of 7 is smaller than the outer diameter A of the plate-shaped material 41. The outer diameter D of the large-diameter pressing tool 39 is larger than the outer diameter A of the plate-shaped material 41.
【００１７】さらに、この実施例では、大径押圧工具３
９の中心には、板状素材４１の中心に形成される貫通孔
４３に挿通されるマンドレル４５が配置されている。図
２は、据え込み工程後の絞り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４７はパンチを、
符号４９はダイを示しており、ダイ４９の上部内周に
は、テーパ部５１が形成されている。Further, in this embodiment, the large-diameter pressing tool 3 is used.
At the center of 9, a mandrel 45 inserted into a through hole 43 formed at the center of the plate-shaped material 41 is arranged. FIG. 2 shows a plastic working apparatus used in the drawing process after the upsetting process. In the drawing, reference numeral 47 indicates a punch,
Reference numeral 49 indicates a die, and a taper portion 51 is formed on the inner periphery of the upper portion of the die 49.
【００１８】以上のように構成された装置を使用して、
本発明のカップ状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。すなわち、本発明方法で
は、先ず、図１に示したように、小径押圧工具３７と大
径押圧工具３９との間に、板状素材４１が収容され、小
径押圧工具３７を大径押圧工具３９側に移動し、小径押
圧工具３７を板状素材４１に押圧することにより、板状
素材４１の外周部５３を残して底部５５となる部分が据
え込み成形され、これにより、板状素材４１の底部５５
の肉厚のみが、肉厚ｔ1 からｔ2 に減少され、外周部５
３の肉厚が底部の肉厚より大とされる。Using the apparatus configured as described above,
One embodiment of the plastic working method of the cup-shaped member of the present invention is performed as described below. That is, in the method of the present invention, first, as shown in FIG. 1, the plate-shaped material 41 is accommodated between the small diameter pressing tool 37 and the large diameter pressing tool 39, and the small diameter pressing tool 37 is moved to the large diameter pressing tool 39. By moving to the side and pressing the small-diameter pressing tool 37 against the plate-shaped material 41, the part which becomes the bottom part 55 except the outer peripheral part 53 of the plate-shaped material 41 is upset-molded. Bottom 55
Only the wall thickness of the outer peripheral portion 5 is reduced from the wall thickness t 1 to t 2.
The thickness of 3 is larger than the thickness of the bottom.
【００１９】そして、この時同時に、小径押圧工具３７
と大径押圧工具３９の成形部の面積の違いにより板状素
材４１の外周部５３が小径押圧工具３７側に高さＨ立ち
上げられ、予備絞りが行われる。すなわち、板状素材４
１における小径押圧工具３７側の受圧部面積に対して、
大径押圧工具３９側の受圧部面積（図の径ｄ2 の内側の
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、据え込みにより外周方向
に排除された素材は、斜め上方へと流動し、この結果、
外周部５３が立ち上がり、外周部５３と底部５５に肉厚
差が形成されると同時に、予備絞りが行われる。At the same time, the small diameter pressing tool 37
And the outer peripheral portion 53 of the plate-shaped material 41 is raised to the height H toward the small diameter pressing tool 37 side by the difference in the area of the forming portion of the large diameter pressing tool 39, and preliminary drawing is performed. That is, the plate-shaped material 4
For the pressure receiving area of the small diameter pressing tool 37 side in No. 1,
The area of the pressure receiving portion on the side of the large-diameter pressing tool 39 (the area inside the diameter d 2 in the figure) becomes large, and due to this difference in the area of the pressure receiving portion, a bending effect due to the difference in the fulcrum occurs, and it is eliminated in the outer peripheral direction by upsetting. Material flows diagonally upward, which results in
The outer peripheral portion 53 rises, a thickness difference is formed between the outer peripheral portion 53 and the bottom portion 55, and at the same time, preliminary drawing is performed.
【００２０】この後、この据え込み工程により得られた
中間素材５７が、図２に示したように、ダイ４９に収容
され、パンチ４７を下方に向けて移動することにより、
中間素材５７の外周部５９が、ダイ４９のテーパ部５１
により内側に向けて折曲され、この後、外周部５９がパ
ンチ４７とダイ４９との間の間隙寸法ｔに成形され、縦
壁部６１の肉厚ｔが、底部５５の肉厚ｔ2 よりも大きい
カップ状部材６３が絞り成形される。Thereafter, the intermediate material 57 obtained by this upsetting step is housed in the die 49 and the punch 47 is moved downward as shown in FIG.
The outer peripheral portion 59 of the intermediate material 57 is the tapered portion 51 of the die 49.
And then the outer peripheral portion 59 is formed to have a gap dimension t between the punch 47 and the die 49, and the wall thickness t of the vertical wall portion 61 is smaller than the wall thickness t 2 of the bottom portion 55. The cup-shaped member 63 having a large size is drawn.
【００２１】しかして、以上述べたカップ状部材の塑性
加工方法では、対向配置され成形部外周寸法の異なる小
径押圧工具３７と大径押圧工具３９とを使用して、小径
押圧工具３７より大径の板状素材４１を、板状素材４１
の外周部５３を残して底部５５となる部分を据え込み成
形し、外周部５３の肉厚を底部５５の肉厚より大とする
とともに、小径押圧工具３７と大径押圧工具３９の成形
部の面積の違いにより板状素材４１の外周部５３を小径
押圧工具３７側に立ち上げる予備絞りを行う据え込み工
程と、この据え込み工程により得られた中間素材５７を
絞り成形し、板状素材４１の外周部５３により形成され
る縦壁部６１の肉厚が、底部５５の肉厚よりも大きいカ
ップ状部材６３を得る絞り工程とにより、カップ状部材
６３を塑性加工するようにしたので、縦壁部６１の肉厚
が底部５５の肉厚より大きいカップ状部材６３を、容
易，確実に形成することが可能となる。However, in the above-mentioned plastic working method of the cup-shaped member, the small-diameter pressing tool 37 and the large-diameter pressing tool 39, which are opposed to each other and have different outer peripheral dimensions of the molding portion, are used, and the diameter larger than that of the small-diameter pressing tool 37 is used. The plate-shaped material 41 of
The outer peripheral part 53 is left and the part which becomes the bottom part 55 is upset, and the wall thickness of the outer peripheral part 53 is made larger than the wall thickness of the bottom part 55, and the forming parts of the small diameter pressing tool 37 and the large diameter pressing tool 39 are formed. The upsetting process of preliminarily drawing the outer peripheral portion 53 of the plate-shaped material 41 toward the small-diameter pressing tool 37 side due to the difference in area and the intermediate material 57 obtained by this upsetting process are drawn to form the plate-shaped material 41. Since the cup-shaped member 63 is plastically processed by a drawing process in which the wall thickness of the vertical wall portion 61 formed by the outer peripheral portion 53 is larger than the wall thickness of the bottom portion 55, the cup-shaped member 63 is plastically worked. It is possible to easily and reliably form the cup-shaped member 63 in which the wall portion 61 has a larger wall thickness than the bottom portion 55.
【００２２】すなわち、以上述べたカップ状部材の塑性
加工方法では、小径押圧工具３７と大径押圧工具３９と
を使用して、板状素材４１を据え込み成形して、底部５
５と外周部５３との肉厚差を形成するようにしたので、
非常に容易に縦壁部６１の肉厚が底部５５の肉厚より大
きいカップ状部材６３を形成することができる。また、
据え込み工程において、予備絞りが行われるため、次工
程の絞り成形が非常に容易となり、この時の据え込み率
を大きくすることにより、外周部５９の立ち上がりを大
きくすることができる。That is, in the plastic working method of the cup-shaped member described above, the small-diameter pressing tool 37 and the large-diameter pressing tool 39 are used to upset and form the plate-shaped material 41, and the bottom portion 5 is formed.
Since a difference in wall thickness between 5 and the outer peripheral portion 53 is formed,
It is very easy to form the cup-shaped member 63 in which the wall thickness of the vertical wall portion 61 is larger than the wall thickness of the bottom portion 55. Also,
Since preliminary drawing is performed in the upsetting process, the drawing process in the next process becomes very easy, and the rise of the outer peripheral portion 59 can be increased by increasing the upsetting ratio at this time.
【００２３】さらに、この実施例では、図２に示したよ
うに、中間素材５７の外周を拘束することなく、据え込
み成形を行うようにしたので、後方押し出しによりカッ
プ状部材を成形する場合に比較して、パンチ４７の面圧
および荷重が極めて少なくなる。例えば、後方押し出し
において断面減少率が８０％となる時には、約１／３．
５となる。Further, in this embodiment, as shown in FIG. 2, since the upsetting is performed without restraining the outer periphery of the intermediate material 57, when the cup-shaped member is formed by backward extrusion, In comparison, the surface pressure and load of the punch 47 are extremely small. For example, when the cross-section reduction rate is 80% in backward extrusion, about 1/3.
It becomes 5.
【００２４】図３および図４は、本発明のカップ状部材
の塑性加工方法の他の実施例を示すもので、このカップ
状部材の塑性加工方法では、据え込み工程において、中
間素材６５の底部５５と外周部５９とのコーナー部６７
に相当する部分に凹部６９を形成した大径押圧工具３９
が使用され、据え込み成形時に、凹部６９に素材を埋め
ることにより、中間素材６５のコーナー部６７の肉厚ｔ
3 が底部５５の肉厚ｔ 2 よりも大きく形成される。3 and 4 show the cup-shaped member of the present invention.
Another example of the plastic working method of
In the plastic working method of the strip-shaped member,
Corner portion 67 between the bottom portion 55 and the outer peripheral portion 59 of the interstitial material 65
Large-diameter pressing tool 39 in which a concave portion 69 is formed in a portion corresponding to
Is used to fill the material in the recess 69 during upsetting.
As a result, the thickness t of the corner 67 of the intermediate material 65 is
3Is the thickness t of the bottom 55 2Formed larger than.
【００２５】そして、この凹部６９による中間素材６５
の肉厚増加部７１は、図４に示すように、絞り成形後の
カップ状部材６３の底部５５と縦壁部６１とのコーナー
部７３となるため、絞り工程におけるコーナー部７３の
剛性を容易に増大することができる。すなわち、コーナ
ー部７３の剛性が小さいと、図５に示すように、コーナ
ー部７３のネッキングに破断が生じ易くなるが、この実
施例では、コーナー部７３の剛性が大きくなるため、コ
ーナー部７３に破断が生じる虞れを低減することがで
き、底部５５の肉厚が薄い時には、特に有効である。Then, the intermediate material 65 formed by the recess 69 is formed.
As shown in FIG. 4, since the thickened portion 71 of the above becomes a corner portion 73 between the bottom portion 55 and the vertical wall portion 61 of the cup-shaped member 63 after drawing, the rigidity of the corner portion 73 in the drawing process is facilitated. Can be increased. That is, when the rigidity of the corner portion 73 is low, as shown in FIG. 5, the necking of the corner portion 73 is likely to break, but in this embodiment, the rigidity of the corner portion 73 is increased, so that the corner portion 73 has a large rigidity. The risk of breakage can be reduced, and it is particularly effective when the thickness of the bottom portion 55 is thin.
【００２６】また、この実施例では、コーナー部７３の
肉厚が増大するため、絞り成形による外側コーナー部７
３の逃げ空間７５を容易に減少することができる。図６
は、本発明のカップ状部材の塑性加工方法のさらに他の
実施例を示すもので、このカップ状部材の塑性加工方法
では、据え込み工程において、外周に沿って凹部７７の
形成される小径押圧工具３７が使用され、据え込み成形
時に、凹部７７に素材を埋めることにより、中間素材６
５のコーナー部６７の肉厚が底部５５の肉厚よりも大き
く形成される。Further, in this embodiment, since the thickness of the corner portion 73 is increased, the outer corner portion 7 formed by drawing is formed.
The escape space 75 of 3 can be easily reduced. Figure 6
Shows yet another embodiment of the plastic working method of the cup-shaped member of the present invention. In the plastic working method of the cup-shaped member, in the upsetting step, a small-diameter pressing with a recess 77 formed along the outer periphery is performed. The tool 37 is used, and by filling the material in the recess 77 during upsetting, the intermediate material 6
The corner portion 67 of No. 5 is formed to be thicker than the bottom portion 55.
【００２７】この実施例においても図３に示した実施例
とほぼ同様の効果を得ることができる。図７は、本発明
のカップ状部材の塑性加工方法のさらに他の実施例を示
すもので、このカップ状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４１の外周部５３の径方向
への伸びを抑制する段部７９を形成した大径押圧工具３
９が使用されている。Also in this embodiment, it is possible to obtain substantially the same effect as that of the embodiment shown in FIG. FIG. 7 shows yet another embodiment of the plastic working method of the cup-shaped member of the present invention. In the plastic working method of the cup-shaped member, the diameter of the outer peripheral portion 53 of the plate-shaped material 41 is increased in the upsetting step. Large-diameter pressing tool 3 formed with a stepped portion 79 for suppressing extension in the direction
9 is used.
【００２８】また、段部７９はテーパ状をしており、段
部７９の外径は、板状素材４１の外径とほぼ同一とされ
ている。そして、段部７９により、板状素材４１の外周
部５３の径方向への伸びを抑制することにより、板状素
材４１の外周部５３の予備絞りによる立ち上げが大きく
されている。The step portion 79 has a tapered shape, and the outer diameter of the step portion 79 is substantially the same as the outer diameter of the plate material 41. The step 79 suppresses the radial extension of the outer peripheral portion 53 of the plate-shaped material 41, so that the outer peripheral portion 53 of the plate-shaped material 41 is largely started up by the preliminary drawing.
【００２９】なお、図７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）は小径押圧工具３７が下死点にある時の状態を示
している。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４１の外周部５３の予備絞りによる立ち上
げを容易に大きくすることができる。In FIG. 7, (a) shows the state before upsetting, and (b) shows the state during upsetting.
(C) shows the state when the small diameter pressing tool 37 is at the bottom dead center. In this embodiment, almost the same effect as that of the embodiment shown in FIG. 1 can be obtained, but in this embodiment, the start-up of the outer peripheral portion 53 of the plate material 41 by the preliminary drawing can be easily increased. it can.
【００３０】図８は、本発明のカップ状部材の塑性加工
方法のさらに他の実施例を示すもので、このカップ状部
材の塑性加工方法では、段部８１の外径が、板状素材４
１の外径より小とされ、据え込み成形の初期に、段部８
１により、板状素材４１の外周部５３に軽い曲げを付与
することにより、板状素材４１の外周部５３の予備絞り
による立ち上げがより大きくされている。FIG. 8 shows still another embodiment of the plastic working method for a cup-shaped member of the present invention. In this plastic working method for a cup-shaped member, the outer diameter of the stepped portion 81 is the plate-shaped material 4.
The outer diameter is smaller than 1, and the step 8
1, the outer peripheral portion 53 of the plate-shaped material 41 is lightly bent, whereby the start-up of the outer peripheral portion 53 of the plate-shaped material 41 by the preliminary drawing is made larger.
【００３１】なお、図８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）は小径押圧工具３７が下死点にある時の状態を示
している。この実施例においても図７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４１の外周部５３の予備絞りによる立ち上
げをさらに大きくすることができる。In FIG. 8, (a) shows a state before upsetting, and (b) shows a state during upsetting.
(C) shows the state when the small diameter pressing tool 37 is at the bottom dead center. In this embodiment, almost the same effect as in the embodiment shown in FIG. 7 can be obtained, but in this embodiment, the start-up of the outer peripheral portion 53 of the plate-shaped material 41 by the preliminary drawing can be further increased. .
【００３２】図９は、本発明のカップ状部材の塑性加工
方法のさらに他の実施例を示すもので、このカップ状部
材の塑性加工方法では、小径押圧工具３７の中央には、
ボス部８３を成形するための孔部８５が形成されてい
る。また、大径押圧工具３９には、板状素材４１の外周
部５３の径方向への伸びを抑制する段部７９が形成され
ている。FIG. 9 shows still another embodiment of the plastic working method for the cup-shaped member of the present invention. In the plastic working method for the cup-shaped member, the center of the small diameter pressing tool 37 is
A hole portion 85 for forming the boss portion 83 is formed. Further, the large-diameter pressing tool 39 is provided with a stepped portion 79 that suppresses radial expansion of the outer peripheral portion 53 of the plate-shaped material 41.
【００３３】この実施例では、据え込み成形時には、予
め中央にボス部形成用の凸部８７の形成された板状素材
４１が使用され、凸部８７を小径押圧工具３７の孔部８
５に収容した状態で据え込み成形が行われる。そして、
板状素材４１を据え込み成形すると、大径押圧工具３９
の段部７９により、板状素材４１の外周部５３の径方向
への伸びが抑制され、これが抵抗となり、板状素材４１
に形成すべきボス部８３側に素材が流出され、ボス部８
３の絞り深さが増大される。In this embodiment, at the time of upsetting, the plate-shaped material 41 having a convex portion 87 for forming a boss portion formed in the center is used, and the convex portion 87 is formed into the hole 8 of the small-diameter pressing tool 37.
Upsetting is performed in the state of being housed in No. 5. And
When the plate-shaped material 41 is upset, the large-diameter pressing tool 39
The stepped portion 79 of the plate-shaped material 41 suppresses the radial expansion of the outer peripheral portion 53 of the plate-shaped material 41, and this serves as resistance, and the plate-shaped material 41
The material flows out to the boss portion 83 side to be formed in the
The drawing depth of 3 is increased.
【００３４】この後、さらに据え込み成形が行われる
と、図１に示したと同様に、外周部５３が立ち上げられ
る。なお、図９において、（ａ）は据え込み成形前の状
態を、（ｂ）は据え込み成形初期の状態を、（ｃ）は小
径押圧工具３７が下死点にある時の状態を示している。Thereafter, when the upsetting is further performed, the outer peripheral portion 53 is raised in the same manner as shown in FIG. In FIG. 9, (a) shows a state before upsetting, (b) shows an initial state of upsetting, and (c) shows a state when the small diameter pressing tool 37 is at the bottom dead center. There is.
【００３５】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、絞り深さの大きいボス部８３を有するカップ状部材
８９を容易に得ることができる。図１０は、本発明のカ
ップ状部材の塑性加工方法のさらに他の実施例を示すも
ので、このカップ状部材の塑性加工方法では、小径押圧
工具３７の中央には、ボス部８３を成形するための孔部
８５が形成されている。In this embodiment, almost the same effect as that of the embodiment shown in FIG. 1 can be obtained, but in this embodiment, the cup-shaped member 89 having the boss portion 83 with a large drawing depth can be easily obtained. be able to. FIG. 10 shows still another embodiment of the plastic working method for a cup-shaped member of the present invention. In this plastic working method for a cup-shaped member, a boss portion 83 is formed in the center of the small diameter pressing tool 37. A hole portion 85 for forming is formed.
【００３６】また、大径押圧工具３９は、スプリング９
１により上方に向けて付勢されており、大径押圧工具３
９には、板状素材４１の外周部５３の径方向への伸びを
抑制する段部７９が形成されている。この実施例では、
据え込み成形時には、突出部の形成されない板状素材４
１が使用され、板状素材４１を据え込み成形すると、大
径押圧工具３９の段部７９により、板状素材４１の外周
部５３の径方向への伸びが抑制され、小径押圧工具３７
の孔部８５に素材が流出され、ボス部８３が形成され
る。The large-diameter pressing tool 39 has a spring 9
The large-diameter pressing tool 3 is urged upward by 1
9 is formed with a stepped portion 79 for suppressing the radial extension of the outer peripheral portion 53 of the plate-shaped material 41. In this example,
Plate-shaped material 4 with no protruding portion formed during upsetting
1 is used and the plate-shaped material 41 is upset, the step 79 of the large-diameter pressing tool 39 suppresses radial expansion of the outer peripheral portion 53 of the plate-shaped material 41, and the small-diameter pressing tool 37.
The material is flowed out into the hole portion 85, and the boss portion 83 is formed.
【００３７】なお、図１０において、（ａ）は据え込み
成形前の状態を、（ｂ）は絞り時の状態を、（ｃ）は据
え込み成形初期の状態を、（ｄ）は小径押圧工具３７が
下死点にある時の状態を示している。この実施例におい
ても図９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４１から、ボス部
８３を有するカップ状部材８９を容易に得ることができ
る。In FIG. 10, (a) shows a state before upsetting, (b) shows a state during drawing, (c) shows an initial state of upsetting, and (d) shows a small-diameter pressing tool. 37 shows the state when 37 is at the bottom dead center. In this embodiment, almost the same effect as the embodiment shown in FIG. 9 can be obtained, but in this embodiment, the cup-shaped member 89 having the boss portion 83 can be easily obtained from the plate-shaped material 41. it can.
【００３８】図１１は、本発明のカップ状部材の塑性加
工方法のさらに他の実施例を示すもので、このカップ状
部材の塑性加工方法では、小径押圧工具３７の中央に
は、部材９３によりボス部８３を成形するための止まり
孔部９５が形成されている。また、大径押圧工具３９に
は、板状素材４１の外周部５３の径方向への伸びを抑制
する段部７９が形成されている。FIG. 11 shows still another embodiment of the plastic working method for a cup-shaped member of the present invention. In this plastic working method for a cup-shaped member, a member 93 is provided at the center of the small-diameter pressing tool 37. A blind hole portion 95 for forming the boss portion 83 is formed. Further, the large-diameter pressing tool 39 is provided with a stepped portion 79 that suppresses radial expansion of the outer peripheral portion 53 of the plate-shaped material 41.
【００３９】この実施例では、止まり孔部９５により、
ボス部８３の頂部を押さえることにより、ボス部８３の
頂部のコーナー部の逃げ空間９７、および、ボス部８３
の反対側の空間９９に板状素材４１が流出される。な
お、図１１において、（ａ）は据え込み成形前の状態
を、（ｂ）は据え込み成形初期の状態を、（ｃ）は小径
押圧工具３７が下死点にある時の状態を示している。In this embodiment, the blind hole portion 95
By pressing the top of the boss 83, the clearance space 97 at the corner of the top of the boss 83 and the boss 83
The plate-shaped material 41 flows out into the space 99 on the opposite side. In addition, in FIG. 11, (a) shows a state before upsetting, (b) shows a state before upsetting, and (c) shows a state when the small diameter pressing tool 37 is at the bottom dead center. There is.
【００４０】この実施例においても図１０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、ボス部８３の頂部のコーナー部の逃げ空間９７を
容易に減少し、また、ボス部８３の反対側の空間に突出
部１０１を容易に形成することができる。なお、この実
施例において、小径押圧工具３７に止まり孔部９５を形
成せずに、板状素材４１を大径押圧工具３９側に流動さ
せることにより、図１２に示すように、カップ状部材１
０３の縦壁部６１と反対側にボス部１０５の形成された
カップ状部材を容易に得ることが可能となる。In this embodiment, almost the same effect as that of the embodiment shown in FIG. 10 can be obtained, but in this embodiment, the escape space 97 at the corner of the top of the boss 83 can be easily reduced, Further, the protrusion 101 can be easily formed in the space opposite to the boss portion 83. In addition, in this embodiment, the plate-shaped material 41 is caused to flow toward the large-diameter pressing tool 39 without forming the blind hole portion 95 in the small-diameter pressing tool 37, so that the cup-shaped member 1 is formed as shown in FIG.
It is possible to easily obtain the cup-shaped member having the boss portion 105 formed on the side opposite to the vertical wall portion 03 of 03.
【００４１】また、ボス部８３に予め孔部１０７を形成
しておくことにより、図１３に示すように、孔付のボス
部１０９を容易に形成することが可能となる。なお、以
上述べた実施例では、小径押圧工具３７および大径押圧
工具３９の断面形状を円形に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、四角形等にしても良いことは勿論である。Further, by forming the hole 107 in the boss 83 in advance, it becomes possible to easily form the boss 109 with a hole as shown in FIG. In addition, in the above-described embodiment, the example in which the cross-sectional shapes of the small diameter pressing tool 37 and the large diameter pressing tool 39 are circular has been described, but the present invention is not limited to such embodiments.
For example, it goes without saying that it may be a quadrangle or the like.
【００４２】また、以上述べた実施例では、小径押圧工
具３７を大径押圧工具３９の上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、大径押圧工具を小径押圧工具の上方に配置して
も良いことは勿論である。Further, in the above-described embodiment, the example in which the small diameter pressing tool 37 is arranged above the large diameter pressing tool 39 has been described, but the present invention is not limited to such an embodiment, and the large diameter pressing tool is not limited thereto. It goes without saying that the tool may be arranged above the small diameter pressing tool.
【００４３】[0043]
【発明の効果】以上述べたように、請求項１のカップ状
部材の塑性加工方法では、対向配置され成形部外周寸法
の異なる小径押圧工具と大径押圧工具とを使用して、小
径押圧工具より大径の板状素材を、板状素材の外周部を
残して底部となる部分を据え込み成形し、外周部の肉厚
を底部の肉厚より大とするとともに、小径押圧工具と大
径押圧工具の成形部の面積の違いにより板状素材の外周
部を小径押圧工具側に立ち上げる予備絞りを行う据え込
み工程と、この据え込み工程により得られた中間素材を
絞り成形し、板状素材の外周部により形成される縦壁部
の肉厚が、底部の肉厚よりも大きいカップ状部材を得る
絞り工程とにより、カップ状部材を塑性加工するように
したので、縦壁部の肉厚が底部の肉厚より大きいカップ
状部材を、容易，確実に形成することが可能となる。As described above, in the plastic working method of the cup-shaped member according to the first aspect, the small-diameter pressing tool and the large-diameter pressing tool which are opposed to each other and have different outer peripheral dimensions of the forming portion are used. A plate-shaped material with a larger diameter is formed by upsetting the bottom part of the plate-shaped material, leaving the outer peripheral part of the plate-shaped material, and the wall thickness of the outer peripheral part is larger than the wall thickness of the bottom part. Due to the difference in the area of the forming part of the pressing tool, the upsetting process that performs the preliminary drawing to raise the outer peripheral part of the plate-shaped material to the small-diameter pressing tool side, and the intermediate material obtained by this upsetting process are drawn and formed into a plate shape. The wall thickness of the vertical wall portion formed by the outer peripheral portion of the material is larger than the wall thickness of the bottom portion, so that the cup-shaped member is plastically worked by a drawing process, so that the wall thickness of the vertical wall portion is increased. A cup-shaped member whose thickness is greater than the thickness of the bottom can be easily It is possible to indeed form.
【００４４】請求項２のカップ状部材の塑性加工方法で
は、請求項１のカップ状部材の塑性加工方法における据
え込み工程において、中間素材の底部と外周部とのコー
ナー部に相当する部分に凹部を形成した大径押圧工具、
または、外周に沿って凹部の形成される小径押圧工具を
使用し、中間素材のコーナー部の肉厚を底部の肉厚より
も大きく形成したので、絞り工程におけるコーナー部の
剛性を容易に増大することができるとともに、絞り成形
による外側コーナー部の逃げ空間を容易に減少すること
ができる。In the plastic working method of the cup-shaped member according to a second aspect, in the upsetting step in the plastic working method of the cup-shaped member according to the first aspect, a recess is formed in a portion corresponding to a corner portion between the bottom portion and the outer peripheral portion of the intermediate material. Large diameter pressing tool,
Alternatively, since a small-diameter pressing tool in which a recess is formed along the outer circumference is used and the thickness of the corner portion of the intermediate material is made larger than the thickness of the bottom portion, the rigidity of the corner portion in the drawing process can be easily increased. In addition, it is possible to easily reduce the escape space at the outer corner portion by drawing.
【００４５】請求項３のカップ状部材の塑性加工方法で
は、請求項１または２におけるカップ状部材の塑性加工
方法における据え込み工程において、板状素材の外周部
の径方向への伸びを抑制する段部を形成した大径押圧工
具を使用したので、板状素材の外周部の予備絞りによる
立ち上げを容易に大きくすることができる。請求項４の
カップ状部材の塑性加工方法では、請求項１ないし３の
いずれか１項記載のカップ状部材の塑性加工方法におけ
る据え込み工程において、板状素材の外周部の径方向へ
の伸びを抑制する段部を形成した大径押圧工具を使用
し、板状素材の据え込み時に、板状素材に形成すべきボ
ス部側に素材を流出させるようにしたので、ボス部の絞
り深さを容易に大きくすることができる。According to the plastic working method of the cup-shaped member of claim 3, in the upsetting step in the plastic working method of the cup-shaped member according to claim 1 or 2, radial expansion of the outer peripheral portion of the plate-shaped material is suppressed. Since the large-diameter pressing tool having the stepped portion is used, it is possible to easily increase the startup of the outer peripheral portion of the plate-shaped material by the preliminary drawing. In the plastic working method of the cup-shaped member according to claim 4, in the upsetting step in the plastic working method of the cup-shaped member according to any one of claims 1 to 3, the radial expansion of the outer peripheral portion of the plate-shaped material is performed. Using a large-diameter pressing tool with a stepped portion that suppresses the flow of material, the material is allowed to flow out to the side of the boss that should be formed on the plate-shaped material when the plate-shaped material is set up. Can be easily increased.
【００４６】請求項５のカップ状部材の塑性加工方法で
は、請求項１ないし３のいずれか１項記載のカップ状部
材の塑性加工方法における据え込み工程において、板状
素材の外周部の径方向への伸びを抑制する段部を形成し
た大径押圧工具を使用し、板状素材の据え込み時に、板
状素材に形成すべきボス部の頂部を押さえることによ
り、ボス部の頂部のコーナー部の逃げ空間、あるいは、
ボス部の反対側の空間に板状素材を流出させるようにし
たので、ボス部の頂部のコーナー部の逃げ空間を容易に
減少し、また、ボス部の反対側の空間に突出部を容易に
形成することができるという利点がある。In the plastic working method of the cup-shaped member according to claim 5, in the upsetting step in the plastic working method of the cup-shaped member according to any one of claims 1 to 3, a radial direction of an outer peripheral portion of the plate-shaped material is provided. Using a large-diameter pressing tool that has a stepped portion that suppresses the expansion of the plate-shaped material, when pressing the plate-shaped material Escape space, or
Since the plate-shaped material is made to flow out into the space on the opposite side of the boss, the clearance space at the corner of the top of the boss can be easily reduced, and the protruding portion can be easily formed in the space on the opposite side of the boss. It has the advantage that it can be formed.
【図１】本発明のカップ状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 cup-shaped member of the present invention.
【図２】本発明のカップ状部材の塑性加工方法の一実施
例の絞り工程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 a drawing step of an embodiment of the plastic working method for a cup-shaped member of the present invention.
【図３】本発明のカップ状部材の塑性加工方法の他の実
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. 3 is a sectional view showing a plastic working apparatus used in an upsetting step of another embodiment of the plastic working method for a cup-shaped member of the present invention.
【図４】本発明のカップ状部材の塑性加工方法の他の実
施例の絞り工程で使用される塑性加工装置を示す断面図
である。FIG. 4 is a cross-sectional view showing a plastic working apparatus used in a drawing step of another embodiment of the cup-shaped member plastic working method of the present invention.
【図５】絞り工程におけるカップ状部材のコーナー部に
生ずる破断を説明するための断面図である。FIG. 5 is a cross-sectional view for explaining breakage that occurs in a corner portion of the cup-shaped member in the drawing process.
【図６】本発明のカップ状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で使用される塑性加工装置を
示す断面図である。FIG. 6 is a cross-sectional view showing a plastic working apparatus used in an upsetting process of still another embodiment of the plastic working method for a cup-shaped member of the present invention.
【図７】本発明のカップ状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. 7 is an explanatory view showing an upsetting process of still another embodiment of the plastic working method of the cup-shaped member of the present invention.
【図８】本発明のカップ状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. 8 is an explanatory view showing an upsetting process of still another embodiment of the plastic working method for a cup-shaped member of the present invention.
【図９】本発明のカップ状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. 9 is an explanatory view showing an upsetting process of still another embodiment of the plastic working method for a cup-shaped member of the present invention.
【図１０】本発明のカップ状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. 10 is an explanatory view showing an upsetting process of still another embodiment of the plastic working method of the cup-shaped member of the present invention.
【図１１】本発明のカップ状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. 11 is an explanatory view showing an upsetting step of still another embodiment of the plastic working method for a cup-shaped member of the present invention.
【図１２】本発明のカップ状部材の塑性加工方法により
形成されたカップ状部材の一例を示す断面図である。FIG. 12 is a cross-sectional view showing an example of a cup-shaped member formed by the plastic working method for a cup-shaped member of the present invention.
【図１３】本発明のカップ状部材の塑性加工方法により
形成されたカップ状部材の一例を示す断面図である。FIG. 13 is a cross-sectional view showing an example of a cup-shaped member formed by the method for plastically processing the cup-shaped member of the present invention.
【図１４】従来のカップ状部材の塑性加工方法を示す説
明図である。FIG. 14 is an explanatory diagram showing a conventional plastic working method for a cup-shaped member.
【図１５】従来のカップ状部材の塑性加工方法を示す説
明図である。FIG. 15 is an explanatory diagram showing a conventional plastic working method for a cup-shaped member.
３７ 小径押圧工具 ３９ 大径押圧工具 ４１ 板状素材 ５５ 底部 ５７ 中間素材 ６１ 縦壁部 ６３ カップ状部材 ６９，７７ 凹部 ７９，８１ 段部 ８３ ボス部 37 Small-diameter pressing tool 39 Large-diameter pressing tool 41 Plate material 55 Bottom 57 Intermediate material 61 Vertical wall 63 Cup-shaped member 69,77 Recess 79,81 Step 83 83 Boss
Claims (5)
径押圧工具と大径押圧工具とを使用して、前記小径押圧
工具より大径の板状素材を、板状素材の外周部を残して
底部となる部分を据え込み成形し、外周部の肉厚を底部
の肉厚より大とするとともに、前記小径押圧工具と大径
押圧工具の成形部の面積の違いにより板状素材の外周部
を小径押圧工具側に立ち上げる予備絞りを行う据え込み
工程と、この据え込み工程により得られた中間素材を絞
り成形し、板状素材の外周部により形成される縦壁部の
肉厚が、底部の肉厚よりも大きいカップ状部材を得る絞
り工程とを有することを特徴とするカップ状部材の塑性
加工方法。1. A small-diameter pressing tool and a large-diameter pressing tool, which are arranged opposite to each other and have different outer peripheral dimensions of a forming portion, are used to form a plate-shaped material having a diameter larger than that of the small-diameter pressing tool, leaving an outer peripheral portion of the plate-shaped material. The bottom part is upset molded, and the wall thickness of the outer peripheral part is made larger than the wall thickness of the bottom part, and the outer peripheral part of the plate-shaped material is formed by the difference in the area of the molding part of the small diameter pressing tool and the large diameter pressing tool. The upsetting process of starting up to the small-diameter pressing tool side and the intermediate material obtained by this upsetting process are drawn, and the wall thickness of the vertical wall formed by the outer peripheral part of the plate-shaped material is And a drawing step for obtaining a cup-shaped member having a thickness larger than that of the cup-shaped member.
と外周部とのコーナー部に相当する部分に凹部を形成し
た大径押圧工具、または、外周に沿って凹部の形成され
る小径押圧工具を使用し、中間素材のコーナー部の肉厚
を底部の肉厚よりも大きく形成し、絞り工程におけるコ
ーナー部の剛性を増大するとともに、絞り成形による外
側コーナー部の逃げ空間を減少することを特徴とする請
求項１記載のカップ状部材の塑性加工方法。2. A large-diameter pressing tool having a recess formed in a portion corresponding to a corner between a bottom portion and an outer peripheral portion of an intermediate material in the upsetting step, or a small-diameter pressing tool having a recess formed along the outer periphery. It is characterized in that the corner of the intermediate material is made thicker than the bottom, increasing the rigidity of the corner in the drawing process and reducing the escape space of the outer corner by drawing. The plastic working method of the cup-shaped member according to claim 1.
部の径方向への伸びを抑制する段部を形成した大径押圧
工具を使用し、板状素材の外周部の予備絞りによる立ち
上げを大きくすることを特徴とする請求項１または２記
載のカップ状部材の塑性加工方法。3. In the upsetting process, a large-diameter pressing tool having a step portion for suppressing radial expansion of the outer peripheral portion of the plate-shaped material is used, and the outer peripheral portion of the plate-shaped material is started up by preliminary drawing. The method of plastic working a cup-shaped member according to claim 1 or 2, characterized in that:
部の径方向への伸びを抑制する段部を形成した大径押圧
工具を使用し、板状素材の据え込み時に、板状素材に形
成すべきボス部側に素材を流出させ、ボス部の絞り深さ
を大きくすることを特徴とする請求項１ないし３のいず
れか１項記載のカップ状部材の塑性加工方法。4. In the upsetting process, a large-diameter pressing tool having a step portion that suppresses radial expansion of the outer peripheral portion of the plate-shaped material is used, and the plate-shaped material is attached to the plate-shaped material at the time of upsetting. The plastic working method for a cup-shaped member according to any one of claims 1 to 3, wherein the material is caused to flow toward the boss portion side to be formed to increase the drawing depth of the boss portion.
部の径方向への伸びを抑制する段部を形成した大径押圧
工具を使用し、板状素材の据え込み時に、板状素材に形
成すべきボス部の頂部を押さえることにより、ボス部の
頂部のコーナー部の逃げ空間、あるいは、ボス部の反対
側の空間に板状素材を流出させることを特徴とする請求
項１ないし３のいずれか１項記載のカップ状部材の塑性
加工方法。5. In the upsetting step, a large-diameter pressing tool having a stepped portion that suppresses radial expansion of the outer peripheral portion of the plate-shaped material is used, and the plate-shaped material is attached to the plate-shaped material during upsetting. The plate-shaped material is caused to flow out into a clearance space at a corner of the top of the boss or a space opposite to the boss by pressing the top of the boss to be formed. The plastic working method of the cup-shaped member according to any one of claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3018829A JPH07115108B2 (en) | 1991-02-12 | 1991-02-12 | Plastic processing method for cup-shaped members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3018829A JPH07115108B2 (en) | 1991-02-12 | 1991-02-12 | Plastic processing method for cup-shaped members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04258337A JPH04258337A (en) | 1992-09-14 |
| JPH07115108B2 true JPH07115108B2 (en) | 1995-12-13 |
Family
ID=11982458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3018829A Expired - Fee Related JPH07115108B2 (en) | 1991-02-12 | 1991-02-12 | Plastic processing method for cup-shaped members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115108B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001026840A1 (en) * | 1999-10-15 | 2001-04-19 | Araco Kabushiki Kaisha | Cold forging and method of manufacturing the cold forging |
| JP2001276955A (en) | 2000-03-30 | 2001-10-09 | Aida Eng Ltd | Tooth form parts with shaft and its forming method |
| JP5039720B2 (en) * | 2009-01-28 | 2012-10-03 | ジヤトコ株式会社 | Work forming method and forming system |
-
1991
- 1991-02-12 JP JP3018829A patent/JPH07115108B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04258337A (en) | 1992-09-14 |
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