JPH07115109B2 - Plastic forming method for L-shaped cross-section members - Google Patents
Plastic forming method for L-shaped cross-section membersInfo
- Publication number
- JPH07115109B2 JPH07115109B2 JP1883091A JP1883091A JPH07115109B2 JP H07115109 B2 JPH07115109 B2 JP H07115109B2 JP 1883091 A JP1883091 A JP 1883091A JP 1883091 A JP1883091 A JP 1883091A JP H07115109 B2 JPH07115109 B2 JP H07115109B2
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- Prior art keywords
- plate
- shaped cross
- pressing tool
- section member
- wall thickness
- 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.)
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Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、Ｌ形断面部材の塑性加
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Ｌ形断面部材を塑性加工により形成するためのＬ
形断面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 an L-shaped cross-section member, and more particularly to an L-shaped cross-section member for forming a L-shaped cross-section member whose wall thickness is larger than that of its bottom by plastic working.
The present invention relates to a plastic working method of a shaped cross-section member.
【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Ｌ形断面部材を塑性加工により形成する方法として
は、例えば、図１５あるいは図１６に示すようなものが
知られている。すなわち、図１５の方法では、先ず、
（ａ）に示すように、パンチ１１とダイ１３により、板
状素材が曲げ成形され、底部１５と縦壁部１７とがほぼ
同様の肉厚を有する中間素材１９が形成され、この後、
（ｂ）および（ｃ）に示すように、この中間素材１９
を、ダイ２１内において、パンチ２３とカウンターパン
チ２５により据え込み成形することにより、底部１５の
肉厚を減少し、縦壁部２７の肉厚が底部２９の肉厚より
大きいＬ形断面部材３１が形成される。2. Description of the Related Art Conventionally, as a method for forming an L-shaped cross-section member in which the wall thickness of the vertical wall portion is larger than the wall thickness of the bottom portion by plastic working, for example, a method shown in FIG. 15 or 16 is known. There is. That is, in the method of FIG. 15, first,
As shown in (a), the plate material is bent and formed by the punch 11 and the die 13 to form the intermediate material 19 having the wall thicknesses of the bottom portion 15 and the vertical wall portion 17 that are substantially the same.
As shown in (b) and (c), this intermediate material 19
Is up-molded in the die 21 by the punch 23 and the counter punch 25, whereby the wall thickness of the bottom portion 15 is reduced and the wall thickness of the vertical wall portion 27 is larger than the wall thickness of the bottom portion 29. Is formed.
【０００３】また、図１６の方法では、先ず、（ａ）に
示すように、パンチ１１とダイ１３により、板状素材が
曲げ成形され、底部１５と縦壁部１７とがほぼ同様の肉
厚を有する中間素材１９が形成され、この後、（ｂ）お
よび（ｃ）に示すように、この中間素材１９の縦壁部１
７を、パンチ３３により据え込み成形し、縦壁部１７の
肉厚を増大することにより、縦壁部２７の肉厚が底部２
９の肉厚より大きいＬ形断面部材３５が形成される。In the method of FIG. 16, first, as shown in (a), the plate material is bent and formed by the punch 11 and the die 13, and the bottom portion 15 and the vertical wall portion 17 have substantially the same thickness. The intermediate material 19 having the following is formed, and thereafter, as shown in (b) and (c), the vertical wall portion 1 of the intermediate material 19 is formed.
7 is up-molded by the punch 33 to increase the wall thickness of the vertical wall portion 17, so that the wall thickness of the vertical wall portion 27 is reduced to the bottom portion 2.
An L-shaped cross-section member 35 having a thickness greater than 9 is formed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、図１５
に示した、底部１５の肉厚を減少させるＬ形断面部材の
塑性加工方法では、底部１５の肉厚が薄くなるに従い、
素材の流れにより、底部１５と縦壁部１７とのコーナー
部Ａが浮き上がり、ひけ等の欠陥が生じ、また、（ａ）
の曲げ加工において、肉厚の比較的大きい板状素材を曲
げる必要があるため、曲げ加工時に、コーナー部Ｂに割
れ等の欠陥が生じ易いという問題があった。However, as shown in FIG.
In the plastic working method of the L-shaped cross-section member which reduces the wall thickness of the bottom portion 15 shown in FIG.
Due to the flow of the material, the corner portion A between the bottom portion 15 and the vertical wall portion 17 is lifted, and defects such as sink marks occur, and (a)
In the bending process, since it is necessary to bend a plate-shaped material having a relatively large wall thickness, there is a problem that defects such as cracks are likely to occur in the corner portion B during the bending process.
【０００５】一方、図１６に示した、据え込み成形によ
り、縦壁部１７の肉厚を増大させるＬ形断面部材の塑性
加工方法では、縦壁部１７の肉厚の増加量が大きい時、
あるいは、据え込み成形前の縦壁部１７の高さが高い時
には、座屈が発生し、縦壁部２７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２７の高さが低いＬ形断面部材にしか採用で
きないという問題があった。On the other hand, in the plastic working method of the L-shaped cross-section member shown in FIG. 16 in which the wall thickness of the vertical wall portion 17 is increased by upsetting, when the increase amount of the wall thickness of the vertical wall portion 17 is large,
Alternatively, when the height of the vertical wall portion 17 before upsetting is high, buckling occurs, and a wrinkle defect occurs in the inner wall or the outer wall of the vertical wall portion 27, so that the wall thickness increase rate is extremely small, There is a problem that it can be used only for the L-shaped cross-section member in which the height of the vertical wall portion 27 is low.
【０００６】また、縦壁部１７を圧縮すると、底部１５
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１５を拘束する等の対策
が必要であった。なお、上述した以外のＬ形断面部材の
塑性加工方法としては、側方押し出しにより、Ｌ形断面
部材を形成する方法が知られているが、この方法では、
素材を拘束した状態での成形となるため、加工荷重が高
く、金型に作用する応力が大きくなり、金型寿命が短
く、また、金型構造が複雑であり、さらに、側方に押し
出す部分の肉厚が薄いほど断面減少率が大きくなるた
め、成形可能な肉厚の比に限度があるという問題があっ
た。When the vertical wall portion 17 is compressed, the bottom portion 15
Since the material tends to flow, it is necessary to take measures such as restraining the bottom portion 15 with a considerably strong restraining force in order to prevent this. As a plastic working method of the L-shaped cross-section member other than the above, a method of forming the L-shaped cross-section member by lateral extrusion is known, but in this method,
Since the molding is performed with the material constrained, the processing load is high, the stress acting on the mold is large, the mold life is short, the mold structure is complicated, and the part that is pushed out to the side The smaller the wall thickness, the larger the cross-sectional reduction rate, and there was a problem that the ratio of the wall thickness that can be formed is limited.
【０００７】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Ｌ形断面部
材を、容易，確実に形成することのできるＬ形断面部材
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 an L-shaped cross-section member which can easily and reliably form an L-shaped cross-section member in which the wall thickness of the vertical wall portion is larger than the wall thickness of the bottom portion. It is an object of the present invention to provide a plastic working method.
【０００８】[0008]
【課題を解決するための手段】請求項１のＬ形断面部材
の塑性加工方法は、対向配置され成形部寸法の異なる第
１押圧工具と第２押圧工具とを使用して、板状素材を、
板状素材の端部を残して底部となる部分を据え込み成形
し、端部の肉厚を底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
より板状素材の端部を立ち上げる予備成形を行う据え込
み工程と、この据え込み工程により得られた中間素材の
立ち上げ部を、１ないし数工程の曲げ加工を含む成形を
することにより、板状素材の端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Ｌ形断面部材を得
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 an L-shaped cross-section member, wherein a plate-shaped material is formed by using a first pressing tool and a second pressing tool which are arranged opposite to each other and have different forming portion sizes. ,
The bottom portion of the plate-shaped material is upset by leaving the end portion of the plate-shaped material, and the thickness of the end portion is made larger than the thickness of the bottom portion, and the area of the forming portion of the first pressing tool and the second pressing tool is Depending on the difference, the upsetting process of preforming the end of the plate-shaped material is performed, and the startup part of the intermediate material obtained by this upsetting process is formed including bending process of one to several steps. Thus, there is a molding step of obtaining an L-shaped cross-section member in which the wall thickness of the vertical wall portion formed by the end portion of the plate-shaped material is larger than the wall thickness of the bottom portion.
【０００９】請求項２のＬ形断面部材の塑性加工方法
は、対向配置され成形部寸法の異なる第１押圧工具と第
２押圧工具とを使用して、板状素材を、板状素材の端部
を残して底部となる部分を据え込み成形し、端部の肉厚
を底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
端部を立ち上げる予備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の立ち上げ部をサ
イジングにより成形することにより、板状素材の端部に
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Ｌ形断面部材を得る成形工程とを有するものである。According to a second aspect of the present invention, there is provided a plastic working method for an L-shaped cross-section member, wherein a first pressing tool and a second pressing tool which are opposed to each other and have different forming portion sizes are used, and the plate-shaped material is moved to an end of the plate-shaped material. The bottom portion is upset while leaving the portion left, and the wall thickness of the end portion is made larger than the wall thickness of the bottom portion, and a plate shape is formed due to the difference in the area of the molding portion of the first pressing tool and the second pressing tool. A vertical wall formed by the ends of a plate-shaped material by forming by a sizing the upsetting process that performs preforming to raise the end of the material and the rising part of the intermediate material obtained by this upsetting process. And a molding step for obtaining an L-shaped cross-section member whose wall thickness is larger than that of the bottom portion.
【００１０】請求項３のＬ形断面部材の塑性加工方法
は、請求項１または２におけるＬ形断面部材の塑性加工
方法における据え込み工程において、板状素材の端部の
外方向への伸びを抑制する段部を形成した押圧工具を使
用し、板状素材の端部の予備成形による立ち上げを大き
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 an L-shaped cross-section member, wherein in the upsetting step in the plastic working method for an L-shaped cross-section member according to the first or second aspect, the end portion of the plate-shaped material is stretched outward. By using a pressing tool having a step portion to be restrained, the start-up of the end portion of the plate-shaped material by preforming is increased.
【００１１】[0011]
【作用】請求項１のＬ形断面部材の塑性加工方法では、
据え込み工程により、板状素材の端部を残して、底部と
なる部分が据え込み成形され、端部の肉厚が底部の肉厚
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端部を立ち上げる
予備成形が行われ、この後の成形工程において、板状素
材の端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Ｌ形断面部材が成形される。In the plastic working method of the L-shaped cross-section member according to claim 1,
By the upsetting process, the bottom portion is upset while leaving the end of the plate-like material, and the thickness of the end is made larger than the thickness of the bottom, and at the same time, the first pressing tool and the second pressing Preforming is performed to raise the end of the plate-shaped material due to the difference in the area of the tool's forming part.In the subsequent forming process, the wall thickness of the vertical wall formed by the end of the plate-shaped material is An L-shaped cross-section member having a thickness greater than the wall thickness is molded.
【００１２】請求項２のＬ形断面部材の塑性加工方法で
は、据え込み工程により得られた中間素材の立ち上げ部
がサイジングにより成形され、板状素材の端部により形
成される縦壁部の肉厚が、底部の肉厚よりも大きいＬ形
断面部材が加工される。請求項３のＬ形断面部材の塑性
加工方法では、据え込み工程において、板状素材の端部
の外方向への伸びを抑制する段部を形成した押圧工具が
使用され、板状素材の端部の予備成形による立ち上げが
大きくされる。In the plastic working method of the L-shaped cross-section member according to the second aspect, the rising portion of the intermediate material obtained by the upsetting step is formed by sizing and the vertical wall portion formed by the end portion of the plate-shaped material is formed. An L-shaped cross-section member having a wall thickness larger than that of the bottom is processed. In the plastic working method of the L-shaped cross-section member according to claim 3, in the upsetting step, a pressing tool having a step portion for suppressing the outward extension of the end portion of the plate-shaped material is used, and the end of the plate-shaped material is used. The start-up by preforming the part is increased.
【００１３】[0013]
【実施例】以下、本発明方法の詳細を図面を用いて実施
例について説明する。本発明のＬ形断面部材の塑性加工
方法の一実施例では、先ず、図１に示すようにして据え
込み工程が行われる。すなわち、先ず、図１の（ａ）に
示すように、対向配置される第１押圧工具３７と第２押
圧工具３９との間に、板状素材４１が配置される。The details of the method of the present invention will be described below with reference to the accompanying drawings. In one embodiment of the plastic working method for the L-shaped cross-section member of the present invention, first, the upsetting step is performed as shown in FIG. That is, first, as shown in FIG. 1A, the plate-shaped material 41 is arranged between the first pressing tool 37 and the second pressing tool 39 which are arranged to face each other.
【００１４】なお、この実施例では、第１押圧工具３７
および第２押圧工具３９は、パンチからなり、上側に配
置される第１押圧工具３７の成形部寸法が、下側に配置
される第２押圧工具３９の成形部寸法より大とされてい
る。この後、第１押圧工具３７を第２押圧工具３９側に
移動し、第１押圧工具３７を板状素材４１に押圧するこ
とにより、図１の（ｂ）に示すように、板状素材４１の
端部４３を残して底部４５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４５の肉厚のみ
が、肉厚ｔ1 からｔ2 に減少され、端部４７の肉厚が底
部４５の肉厚より大とされる。In this embodiment, the first pressing tool 37
The second pressing tool 39 is a punch, and the dimension of the first pressing tool 37 arranged on the upper side is larger than the dimension of the second pressing tool 39 arranged on the lower side. After that, the first pressing tool 37 is moved to the second pressing tool 39 side, and the first pressing tool 37 is pressed against the plate-shaped material 41, so that the plate-shaped material 41 as shown in FIG. Of the bottom material 45 of the plate-shaped material 41 is reduced from the thickness t 1 to the thickness t 2 and the thickness of the end portion 47 is reduced. The thickness is made larger than the wall thickness of the bottom portion 45.
【００１５】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４１の端部４３が第１押圧工具３７側に高さＨ立ち上
げられ、予備成形が行われる。すなわち、板状素材４１
における第１押圧工具３７側の受圧部Ｌ1 に対して、第
２押圧工具３９側の受圧部Ｌ2 が大きくなり、第２押圧
工具３９側の素材流動速度が第１押圧工具４５側の素材
流動速度より大きくなり、据え込みにより端部４３方向
に排除された素材は、斜め上方へと流動し、また、受圧
部Ｌ1 ，Ｌ2 の終端位置Ｐ1 ，Ｐ2 の違いにより板状素
材４１は、Ｐ1 とＰ2 のラインで曲げ変形を受け、端部
４３が立ち上がり、端部４７と底部４５に肉厚差が形成
されると同時に、予備成形が行われる。At the same time, the first pressing tool 37
And the end portion 43 of the plate-shaped material 41 is raised by the height H toward the first pressing tool 37 side due to the difference in the area of the forming portion of the second pressing tool 39, and preforming is performed. That is, the plate material 41
In comparison with the pressure receiving portion L 1 on the side of the first pressing tool 37, the pressure receiving portion L 2 on the side of the second pressing tool 39 is larger, and the material flow speed on the side of the second pressing tool 39 is the material on the side of the first pressing tool 45. The material, which becomes higher than the flow velocity and is removed in the direction of the end portion 43 by upsetting, flows obliquely upward and due to the difference in the end positions P 1 and P 2 of the pressure receiving portions L 1 and L 2 , the plate-shaped material. 41 is subjected to bending deformation at the line of P 1 and P 2 , the end portion 43 rises, a thickness difference is formed between the end portion 47 and the bottom portion 45, and at the same time, preforming is performed.
【００１６】この後、この据え込み工程により得られた
中間素材４９が、図２の（ａ）に示すように、ダイ５１
のカウンターパンチ５３とパンチ５５との間に配置さ
れ、パンチ５５を下方に向けて移動することにより、中
間素材４９の端部４７が、ダイ５１のテーパ部５７によ
り内側に向けて折曲され、この後、（ｂ）に示すよう
に、端部４７がパンチ５５とダイ５１との間の間隙寸法
に成形され、縦壁部５９の肉厚が、底部６１の肉厚より
も大きい中間素材６３が曲げ成形される。After this, the intermediate material 49 obtained by this upsetting process is transferred to the die 51 as shown in FIG.
Is disposed between the counter punch 53 and the punch 55, and by moving the punch 55 downward, the end portion 47 of the intermediate material 49 is bent inward by the taper portion 57 of the die 51, After that, as shown in (b), the end portion 47 is formed to have a gap size between the punch 55 and the die 51, and the wall thickness of the vertical wall portion 59 is larger than that of the bottom portion 61. Is bent and formed.
【００１７】この後、この曲げ成形により得られた中間
素材６３が、図３の（ａ）に示すように、パンチ６５と
パンチ６７との間に配置され、パンチ６５を下方に向け
て移動することにより、中間素材６３の端部５９が、パ
ンチ６５に形成される凹部６９に挿入され、さらに、パ
ンチ６５を下降することにより、（ｂ）に示すように、
端部５９が、凹部６９の間隙寸法ｔ3 に成形され、縦壁
部７５の肉厚ｔ3 が、底部７１の肉厚ｔ4 よりも大きい
Ｌ形断面部材７３がサイジング成形される。After that, the intermediate material 63 obtained by this bending is placed between the punch 65 and the punch 67 as shown in FIG. 3A, and the punch 65 is moved downward. As a result, the end portion 59 of the intermediate material 63 is inserted into the concave portion 69 formed in the punch 65, and the punch 65 is further lowered, as shown in (b).
The end portion 59 is formed to have the gap dimension t 3 of the recess 69, and the L-shaped cross-section member 73 in which the wall thickness t 3 of the vertical wall portion 75 is larger than the wall thickness t 4 of the bottom portion 71 is formed by sizing.
【００１８】しかして、以上述べたＬ形断面部材の塑性
加工方法では、対向配置され成形部寸法の異なる第１押
圧工具３７と第２押圧工具３９とを使用して、板状素材
４１を、板状素材４１の端部４３を残して底部４５とな
る部分を据え込み成形し、端部４７の肉厚を底部４５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４１の
端部４７を立ち上げる予備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４９の立ち上
げ部（端部４７）を、曲げ加工を含む成形をすることに
より、板状素材４１の端部４３により形成される縦壁部
７５の肉厚が、底部７１の肉厚よりも大きいＬ形断面部
材７３を得る成形工程とにより、Ｌ形断面部材７３を塑
性加工するようにしたので、縦壁部７５の肉厚が底部７
１の肉厚より大きいＬ形断面部材７３を、容易，確実に
形成することが可能となる。In the above-described plastic working method for the L-shaped cross-section member, the plate-shaped material 41 is formed by using the first pressing tool 37 and the second pressing tool 39 which are opposed to each other and have different forming portion sizes. The part which becomes the bottom part 45 is left up-molded leaving the end part 43 of the plate-shaped material 41, and the wall thickness of the end part 47 is made larger than the wall thickness of the bottom part 45, and the first pressing tool 37 and the second pressing tool. An upsetting step of performing preforming for raising the end portion 47 of the plate-shaped material 41 due to the difference in the area of the forming portion of 39;
By forming the rising portion (end portion 47) of the intermediate material 49 obtained by this upsetting step including bending, the meat of the vertical wall portion 75 formed by the end portion 43 of the plate-shaped material 41. Since the L-shaped cross-section member 73 is plastically worked by the forming step for obtaining the L-shaped cross-section member 73 whose thickness is larger than the wall thickness of the bottom portion 71, the wall thickness of the vertical wall portion 75 is the bottom portion 7.
It is possible to easily and reliably form the L-shaped cross-section member 73 that is thicker than the first thickness.
【００１９】すなわち、以上述べたＬ形断面部材の塑性
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４１を据え込み成形して、底部４
５と端部４７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７５の肉厚が底部７１の肉厚より大き
いＬ形断面部材７３を形成することができる。また、据
え込み工程において、端部４７を立ち上げる予備成形が
行われるため、次工程の曲げ成形が非常に容易となり、
図２の（ｂ）に示すコーナー部７７の割れ等の発生の虞
れを低減することができる。That is, in the above-described plastic working method for the L-shaped cross-section member, the first pressing tool 37 and the second pressing tool 39 are used to upset the plate-shaped material 41 to form the bottom portion 4.
Since the difference in wall thickness between 5 and the end portion 47 is formed, the L-shaped cross-section member 73 in which the wall thickness of the vertical wall portion 75 is larger than the wall thickness of the bottom portion 71 can be very easily formed. Further, in the upsetting process, preforming for raising the end portion 47 is performed, so that the bending process in the next process becomes very easy,
It is possible to reduce the risk of cracking of the corner 77 shown in FIG. 2B.
【００２０】なお、据え込み工程において、据え込み率
を大きくすることにより、素材流動速度差および曲げ変
形量が大きくなるため、端部５９の立ち上がりを大きく
することができる。さらに、この実施例では、図１の
（ｂ）に示したように、板状素材４１の側面を拘束する
ことなく、据え込み成形を行うようにしたので、押し出
し成形により成形する場合に比較して、パンチ３７の面
圧および荷重が極めて少なくなる。In the upsetting step, increasing the upsetting rate increases the material flow velocity difference and the bending deformation amount, so that the rising of the end portion 59 can be increased. Further, in this embodiment, as shown in FIG. 1 (b), the upsetting is performed without restraining the side surface of the plate-shaped material 41. Therefore, as compared with the case of extrusion molding, As a result, the surface pressure and load of the punch 37 are extremely reduced.
【００２１】図４は、本発明のＬ形断面部材の塑性加工
方法の他の実施例を示すもので、このＬ形断面部材の塑
性加工方法では、図２に示した曲げ成形および図３に示
したサイジング成形が一工程で行われる。すなわち、こ
の実施例では、図４の（ａ）に示すように、パンチ７９
とカウンターパンチ８１との間に、中間素材４９が配置
され、この後、（ｂ）に示すように、パンチ７９を下降
することにより、パンチ７９とダイ８３との間隙８５に
より中間素材４９の端部４７が曲げ成形され、この後、
（ｃ）に示すように、パンチ８７によりサイジング成形
が行われる。FIG. 4 shows another embodiment of the plastic working method of the L-shaped cross-section member of the present invention. In the plastic working method of the L-shaped cross-section member, the bending forming shown in FIG. The sizing molding shown is carried out in one step. That is, in this embodiment, as shown in FIG.
The intermediate material 49 is arranged between the counter punch 81 and the counter punch 81. Thereafter, as shown in (b), by lowering the punch 79, the gap 85 between the punch 79 and the die 83 causes an end of the intermediate material 49. The part 47 is bent, and after this,
As shown in (c), sizing molding is performed by the punch 87.
【００２２】なお、図４において符号８９，９１は、そ
れぞれスプリングからなる付勢部材を示している。図５
および図６は、本発明のＬ形断面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Ｌ形断面部材の塑
性加工方法では、図５に示す据え込み工程の後、図６に
示すように、縦壁部９３形成用の凹部９５，９７の形成
されたパンチ９９とダイ１０１によりサイジング成形が
行われる。In FIG. 4, reference numerals 89 and 91 denote biasing members made of springs. Figure 5
6 and 6 show yet another embodiment of the plastic working method for an L-shaped cross-section member of the present invention. In this plastic working method for an L-shaped cross-section member, after the upsetting step shown in FIG. As shown in FIG. 5, sizing is performed by the punch 99 and the die 101 in which the concave portions 95 and 97 for forming the vertical wall portion 93 are formed.
【００２３】すなわち、この実施例では、（ａ）に示す
ように、パンチ９９とカウンターパンチ１０３との間
に、中間素材４９が配置され、この後、（ｂ）に示すよ
うに、パンチ９９を下降することにより、パンチ９９と
ダイ１０１の凹部９５，９７により中間素材４９の端部
４７のサイジング成形が行われる。なお、図６において
符号１０５は、スプリングからなる付勢部材を示してい
る。That is, in this embodiment, as shown in (a), the intermediate material 49 is arranged between the punch 99 and the counter punch 103, and then, as shown in (b), the punch 99 is moved. As it descends, the punch 99 and the recesses 95 and 97 of the die 101 perform sizing of the end portion 47 of the intermediate material 49. In FIG. 6, reference numeral 105 indicates a biasing member made of a spring.
【００２４】この方法は、図５に示した予備成形時の中
間素材４９の端部４７の形状が、一般に山型となるた
め、特に、断面形状が三角形，丸形等の縦壁部９３を形
成する場合に適している。図７ないし図９は、本発明の
Ｌ形断面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Ｌ形断面部材の塑性加工方法では、図７に
示すように、据え込み工程において、板状素材４１の端
部４３の外方向への伸びを抑制する段部１０７を形成し
た第２押圧工具３９が使用されている。In this method, since the end portion 47 of the intermediate material 49 at the time of preforming shown in FIG. 5 is generally mountain-shaped, the vertical wall portion 93 having a triangular or round cross-section is particularly preferable. Suitable for forming. 7 to 9 show still another embodiment of the plastic working method for the L-shaped cross-section member of the present invention. In the plastic working method for the L-shaped cross-section member, as shown in FIG. In the above, the second pressing tool 39 in which the step portion 107 for suppressing the outward extension of the end portion 43 of the plate-shaped material 41 is formed is used.
【００２５】また、段部１０７はテーパ状をしており、
段部１０７の位置は、板状素材４１の端面とほぼ同一と
されている。そして、段部１０７により、板状素材４１
の端部４３の外方向への伸びを抑制することにより、板
状素材４１の端部４３の予備成形による立ち上げが大き
くされている。The step portion 107 has a tapered shape,
The position of the step portion 107 is substantially the same as the end surface of the plate-shaped material 41. Then, by the step portion 107, the plate-shaped material 41
By suppressing the outward extension of the end portion 43 of the plate 43, the start-up of the end portion 43 of the plate-shaped material 41 by preforming is increased.
【００２６】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）は第１押圧工具３７が下死点にある時の状態を示
している。この後、図８に示すように、端部１０９が曲
げ成形され、さらに、図９に示すように、サイジング成
形が行われる。In FIG. 7, (a) shows a state before upsetting, and (b) shows a state during upsetting.
(C) shows the state when the first pressing tool 37 is at the bottom dead center. After that, as shown in FIG. 8, the end portion 109 is bent, and further, as shown in FIG. 9, sizing is performed.
【００２７】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の端部４３の予備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１０は、本発明の
Ｌ形断面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Ｌ形断面部材の塑性加工方法では、ダイ１
１１に段部１１３が形成され、据え込み成形の初期に、
段部１１３により、板状素材４１の端部４３に軽い曲げ
を付与することにより、板状素材４１の端部４３の予備
成形による立ち上げがより大きくされている。In this embodiment, almost the same effect as that of the embodiment shown in FIG. 1 can be obtained, but in this embodiment, the start-up of the end portion 43 of the plate-shaped material 41 by preforming can be easily made large. can do. FIG. 10 shows still another embodiment of the plastic working method for an L-shaped cross-section member of the present invention. In this plastic working method for an L-shaped cross-section member, the die 1 is used.
11 is formed with a stepped portion 113, and in the initial stage of upsetting,
By giving a slight bend to the end portion 43 of the plate-shaped material 41 by the step portion 113, the start-up of the end portion 43 of the plate-shaped material 41 by preforming is further increased.
【００２８】なお、図１０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。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の端部４３の予備成形による立ち上げ
をさらに大きくすることができる。In FIG. 10, (a) shows the state before upsetting, (b) shows the state during upsetting,
(C) shows the state when the first pressing tool 37 is at the bottom dead center. In this embodiment, almost the same effect as the embodiment shown in FIG. 7 can be obtained, but in this embodiment, the start-up of the end portion 43 of the plate-shaped material 41 by preforming can be further increased. .
【００２９】なお、図７および図１０に示した実施例で
は、予備成形による端部４３の立ち上がりが大きいた
め、例えば、図１１に示すように、図８に示した曲げ成
形および図９に示したサイジング成形を一工程で容易に
行なうことができる。すなわち、図１１の（ａ）に示す
ように、パンチ７９とカウンターパンチ８１との間に、
中間素材４９が配置され、この後、（ｂ）に示すよう
に、パンチ７９を下降することにより、パンチ７９とダ
イ８３との間隙８５により中間素材４９の端部４７が曲
げ成形され、この後、（ｃ）に示すように、パンチ８７
によりサイジング成形が行われる。In the embodiment shown in FIGS. 7 and 10, since the rising of the end portion 43 by preforming is large, for example, as shown in FIG. 11, the bending forming shown in FIG. 8 and the bending forming shown in FIG. The sizing molding can be easily performed in one step. That is, as shown in FIG. 11A, between the punch 79 and the counter punch 81,
The intermediate material 49 is arranged, and thereafter, as shown in (b), by lowering the punch 79, the end portion 47 of the intermediate material 49 is bent and formed by the gap 85 between the punch 79 and the die 83. , (C), punch 87
By this, sizing molding is performed.
【００３０】なお、以上述べた実施例では、成形部の面
積の小さい第１押圧工具３７を第２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、第２押圧工具を第１押圧
工具の上方に配置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、通常の単純なＬ形断面部材に本
発明を適用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、図１２に示
すように両側に縦壁部７５の形成された両側Ｌ形断面部
材、図１３に示すようにその一部にのみ縦壁部７５の形
成されたＬ形断面部材、図１４に示すように三角形状の
縦壁部７５の形成されたＬ形断面部材等にも適用できる
ことは勿論であり、さらには、縦壁部が複数に分割され
ているＬ形断面部材にも適用できることは勿論である。In the above-described embodiment, an example in which the first pressing tool 37 having a small molding area is arranged above the second pressing tool 39 has been described, but the present invention is limited to this embodiment. Of course, the second pressing tool may be arranged above the first pressing tool instead of the above. Also,
In the embodiment described above, an example in which the present invention is applied to an ordinary simple L-shaped cross-section member has been described, but the present invention is not limited to such an embodiment and, for example, as shown in FIG. L-shaped cross-section members having vertical wall portions 75 formed therein, L-shaped cross-section members having vertical wall portions 75 formed only in a part thereof as shown in FIG. 13, and triangular vertical walls as shown in FIG. It is needless to say that the present invention can be applied to an L-shaped cross-section member in which the portion 75 is formed, and further to an L-shaped cross-section member in which the vertical wall portion is divided into a plurality of parts.
【００３１】[0031]
【発明の効果】以上述べたように、請求項１のＬ形断面
部材の塑性加工方法では、対向配置され成形部寸法の異
なる第１押圧工具と第２押圧工具とを使用して、板状素
材を、板状素材の端部を残して底部となる部分を据え込
み成形し、端部の肉厚を底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
により板状素材の端部を立ち上げる予備成形を行う据え
込み工程と、この据え込み工程により得られた中間素材
の立ち上げ部を、１ないし数工程の曲げ加工を含む成形
をすることにより、板状素材の端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Ｌ形断面部材を
得る成形工程とにより、Ｌ形断面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Ｌ
形断面部材を、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 L-shaped cross-section member according to the first aspect of the present invention, the plate-shaped member is formed by using the first pressing tool and the second pressing tool which are arranged opposite to each other and have different forming portion sizes. The material is upset to form a bottom portion of the plate-shaped material, leaving the end portion, and the wall thickness of the end portion is made larger than the wall thickness of the bottom portion, and the molding portion of the first pressing tool and the second pressing tool is formed. Depending on the area difference, the upsetting process that preforms the end of the plate-shaped material is performed, and the startup part of the intermediate material obtained by this upsetting process is formed by one or several bending processes. By doing so, the L-shaped cross-section member is plastically processed by a forming step in which the wall thickness of the vertical wall portion formed by the end portion of the plate-shaped material is larger than the wall thickness of the bottom portion. Therefore, the wall thickness of the vertical wall is larger than the wall thickness of the bottom L
The shaped cross-section member can be formed easily and reliably.
【００３２】請求項２のＬ形断面部材の塑性加工方法で
は、対向配置され成形部寸法の異なる第１押圧工具と第
２押圧工具とを使用して、板状素材を、板状素材の端部
を残して底部となる部分を据え込み成形し、端部の肉厚
を底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
端部を立ち上げる予備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の立ち上げ部をサ
イジングにより成形することにより、板状素材の端部に
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Ｌ形断面部材を得る成形工程とにより、Ｌ形断面部材
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Ｌ形断面部材を、容易，確実に形成する
ことが可能となる。In the plastic working method of the L-shaped cross-section member according to the second aspect, the plate-shaped raw material is cut at the end of the plate-shaped raw material by using the first pressing tool and the second pressing tool which are opposed to each other and have different forming portion sizes. The bottom portion is upset while leaving the portion left, and the wall thickness of the end portion is made larger than the wall thickness of the bottom portion, and a plate shape is formed due to the difference in the area of the molding portion of the first pressing tool and the second pressing tool. A vertical wall formed by the ends of a plate-shaped material by forming by a sizing the upsetting process that performs preforming to raise the end of the material and the rising part of the intermediate material obtained by this upsetting process. Since the L-shaped cross-section member is plastically worked by the forming step in which the wall thickness of the portion is larger than that of the bottom portion, the wall thickness of the vertical wall portion is larger than that of the bottom portion. It becomes possible to easily and surely form the L-shaped cross-section member.
【００３３】請求項３のＬ形断面部材の塑性加工方法で
は、請求項１または２におけるＬ形断面部材の塑性加工
方法における据え込み工程において、板状素材の端部の
外方向への伸びを抑制する段部を形成した押圧工具を使
用したので、板状素材の端部の予備成形による立ち上げ
を容易に大きくすることができるという利点がある。In the plastic working method for the L-shaped cross-section member according to claim 3, in the upsetting step in the plastic working method for the L-shaped cross-section member according to claim 1 or 2, the outward expansion of the end portion of the plate-shaped material is performed. Since the pressing tool having the step portion to be suppressed is used, there is an advantage that the start-up of the end portion of the plate-shaped material by preforming can be easily increased.
【図１】本発明のＬ形断面部材の塑性加工方法の一実施
例の据え込み工程を示す説明図である。FIG. 1 is an explanatory view showing an upsetting step of an embodiment of a plastic working method for an L-shaped cross-section member of the present invention.
【図２】本発明のＬ形断面部材の塑性加工方法の一実施
例の曲げ成形を示す説明図である。FIG. 2 is an explanatory view showing bending of an embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図３】本発明のＬ形断面部材の塑性加工方法の一実施
例のサイジング成形を示す説明図である。FIG. 3 is an explanatory view showing sizing molding of an embodiment of a plastic working method for an L-shaped cross-section member of the present invention.
【図４】図２および図３の工程を一工程で行う方法を示
す説明図である。FIG. 4 is an explanatory diagram showing a method of performing the steps of FIGS. 2 and 3 in one step.
【図５】本発明のＬ形断面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. 5 is an explanatory view showing an upsetting step of still another embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図６】本発明のＬ形断面部材の塑性加工方法のさらに
他の実施例のサイジング成形を示す説明図である。FIG. 6 is an explanatory view showing sizing molding of still another embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図７】本発明のＬ形断面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 step of still another embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図８】本発明のＬ形断面部材の塑性加工方法のさらに
他の実施例の曲げ成形を示す説明図である。FIG. 8 is an explanatory view showing bending of yet another embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図９】本発明のＬ形断面部材の塑性加工方法のさらに
他の実施例のサイジング成形を示す説明図である。FIG. 9 is an explanatory view showing sizing molding of still another embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図１０】本発明のＬ形断面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 step of still another embodiment of the plastic working method for an L-shaped cross-section member of the present invention.
【図１１】図８および図９の工程を一工程で行う方法を
示す説明図である。FIG. 11 is an explanatory diagram showing a method of performing the steps of FIGS. 8 and 9 in one step.
【図１２】本発明のＬ形断面部材の塑性加工方法により
形成されたＬ形断面部材の一例を示す斜視図である。FIG. 12 is a perspective view showing an example of an L-shaped cross-section member formed by the plastic working method of the L-shaped cross-section member of the present invention.
【図１３】本発明のＬ形断面部材の塑性加工方法により
形成されたＬ形断面部材の一例を示す斜視図である。FIG. 13 is a perspective view showing an example of an L-shaped cross-section member formed by the plastic working method of the L-shaped cross-section member of the present invention.
【図１４】本発明のＬ形断面部材の塑性加工方法により
形成されたＬ形断面部材の一例を示す斜視図である。FIG. 14 is a perspective view showing an example of an L-shaped cross-section member formed by the plastic working method of the L-shaped cross-section member of the present invention.
【図１５】従来のＬ形断面部材の塑性加工方法を示す説
明図である。FIG. 15 is an explanatory view showing a conventional plastic working method for an L-shaped cross-section member.
【図１６】従来のＬ形断面部材の塑性加工方法を示す説
明図である。FIG. 16 is an explanatory view showing a conventional plastic working method for an L-shaped cross-section member.
３７ 第１押圧工具 ３９ 第２押圧工具 ４１ 板状素材 ４３ 端部 ４５ 底部 ４９ 中間素材 ７３ Ｌ形断面部材 ７５ 縦壁部 37 1st pressing tool 39 2nd pressing tool 41 Plate-shaped material 43 End part 45 Bottom part 49 Intermediate material 73 L-shaped cross-section member 75 Vertical wall part
Claims (3)
圧工具と第２押圧工具とを使用して、板状素材を、板状
素材の端部を残して底部となる部分を据え込み成形し、
端部の肉厚を底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
板状素材の端部を立ち上げる予備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の立ち
上げ部を、１ないし数工程の曲げ加工を含む成形をする
ことにより、板状素材の端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Ｌ形断面部材を得る成
形工程とを有することを特徴とするＬ形断面部材の塑性
加工方法。1. A plate-shaped material is upset by using a first pressing tool and a second pressing tool which are arranged opposite to each other and have different molding portion sizes, and a bottom portion of the plate-shaped material is left while leaving an end portion of the plate-shaped material. Then
An upsetting step in which the wall thickness of the end portion is made larger than the wall thickness of the bottom portion, and preforming is performed to raise the end portion of the plate-shaped material due to the difference in the area of the forming portion between the first pressing tool and the second pressing tool. And the rising portion of the intermediate material obtained by this upsetting step is formed by bending including one to several steps, the wall thickness of the vertical wall portion formed by the end portion of the plate-shaped material is reduced. And a forming step for obtaining an L-shaped cross-section member having a thickness larger than the bottom wall thickness, the plastic working method of the L-shaped cross-section member.
圧工具と第２押圧工具とを使用して、板状素材を、板状
素材の端部を残して底部となる部分を据え込み成形し、
端部の肉厚を底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
板状素材の端部を立ち上げる予備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の立ち
上げ部をサイジングにより成形することにより、板状素
材の端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Ｌ形断面部材を得る成形工程とを有するこ
とを特徴とするＬ形断面部材の塑性加工方法。2. A plate-shaped material is upset by using a first pressing tool and a second pressing tool which are arranged opposite to each other and have different molding portion sizes, and a bottom portion of the plate-shaped material is left while leaving an end portion of the plate-shaped material. Then
An upsetting step in which the wall thickness of the end portion is made larger than the wall thickness of the bottom portion, and preforming is performed to raise the end portion of the plate-shaped material due to the difference in the area of the forming portion between the first pressing tool and the second pressing tool. By forming the rising portion of the intermediate material obtained by this upsetting step by sizing, the wall thickness of the vertical wall portion formed by the end portion of the plate-shaped material is larger than the wall thickness of the bottom portion. And a forming step of obtaining a L-shaped cross-section member.
の外方向への伸びを抑制する段部を形成した押圧工具を
使用し、板状素材の端部の予備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または２記載のＬ形
断面部材の塑性加工方法。3. In the upsetting process, a pressing tool having a step portion for suppressing the outward extension of the end portion of the plate-shaped material is used, and the start-up of the end portion of the plate-shaped material by preforming is increased. The plastic working method for an L-shaped cross-section member according to claim 1 or 2, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1883091A JPH07115109B2 (en) | 1991-02-12 | 1991-02-12 | Plastic forming method for L-shaped cross-section members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1883091A JPH07115109B2 (en) | 1991-02-12 | 1991-02-12 | Plastic forming method for L-shaped cross-section members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04258338A JPH04258338A (en) | 1992-09-14 |
| JPH07115109B2 true JPH07115109B2 (en) | 1995-12-13 |
Family
ID=11982485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1883091A Expired - Lifetime JPH07115109B2 (en) | 1991-02-12 | 1991-02-12 | Plastic forming method for L-shaped cross-section members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115109B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4674428B2 (en) * | 2000-12-13 | 2011-04-20 | 株式会社デンソー | Wire rod processing method |
| US10164487B2 (en) | 2013-01-28 | 2018-12-25 | Asmo Co., Ltd. | Motor, method for manufacturing magnetic plate, and method for manufacturing stator |
| JP6062754B2 (en) * | 2013-01-28 | 2017-01-18 | アスモ株式会社 | Method for manufacturing auxiliary core member and method for manufacturing stator |
-
1991
- 1991-02-12 JP JP1883091A patent/JPH07115109B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04258338A (en) | 1992-09-14 |
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