JPH03291115A - Manufacture of tapered pipe with axial center bent from plate material - Google Patents
Manufacture of tapered pipe with axial center bent from plate materialInfo
- Publication number
- JPH03291115A JPH03291115A JP2090558A JP9055890A JPH03291115A JP H03291115 A JPH03291115 A JP H03291115A JP 2090558 A JP2090558 A JP 2090558A JP 9055890 A JP9055890 A JP 9055890A JP H03291115 A JPH03291115 A JP H03291115A
- Authority
- JP
- Japan
- Prior art keywords
- curved
- bent
- mold
- semi
- groove
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000011265 semifinished product Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 abstract description 5
- 230000037303 wrinkles Effects 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 description 7
- 238000000748 compression moulding Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/065—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes starting from a specific blank, e.g. tailored blank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は板材から軸芯が屈曲するテーパ管を製造する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a tapered pipe whose axis is bent from a plate material.
従来、車輌のインストルメントパネル内に架設してステ
アリングコラムを支持するりインストルメントは、一般
に第１１図に示すように大径部イと小径部口で構成され
ている。 そしてその大径部イの製造方法として、例え
ば第１１図に示すように、上部リインホースメント１０
１と下部リインホースメント１０２とをフランジ部１０
３と１０４で溶接して形成する方法がある（実開昭５９
−７２１７２号公報）。 この方法によると、溶接結合
されたフランジ部１０３．１０４がインストルメントパ
ネル内の配線を損傷させる等の問題がある。2. Description of the Related Art Conventionally, an instrument installed in an instrument panel of a vehicle to support a steering column is generally composed of a large diameter part A and a small diameter part, as shown in FIG. As a method for manufacturing the large diameter portion A, for example, as shown in FIG.
1 and the lower reinforcement 102 at the flange portion 10
There is a method of welding 3 and 104.
-72172). According to this method, there are problems such as the welded flange portions 103 and 104 damaging the wiring within the instrument panel.
この問題を解消する手段として、第１２図に示すような
製造方法が提案されている（実開昭６１−３０７９号公
報）、 この製造方法は、第１２図（Ａ）に示すような
台形に切断した板材１０５を、ロールまたはプレス等に
より第１２図（Ｂ）のようにテーバ管状に巻いてその端
部１０６を溶接して軸芯が直線のテーパ管１０７とし、
これを第１２図（Ｃ）のように軸芯が屈曲するテーパ管
１０８にプレス圧縮成形して変形し、これをリインホー
スメントの大径部として使用するようにしたものである
。As a means to solve this problem, a manufacturing method as shown in Fig. 12 has been proposed (Utility Model Application Publication No. 61-3079). The cut plate material 105 is rolled or pressed into a tapered tube shape as shown in FIG. 12(B), and the end portion 106 is welded to form a tapered tube 107 with a straight axis.
This is deformed by press compression molding into a tapered tube 108 whose axis is bent as shown in FIG. 12(C), and this is used as a large diameter portion of a reinforcement.
［発明が解決しようとする課題］
前記第１２図に示すように軸芯が直線のテーパ管１０７
から軸芯が屈曲するテーパ管１０８にプレス圧縮成形に
て変形するものにおいては、その曲げ部が局部座屈した
りしわが生じて商品として成立しない場合がある。 す
なわち、バイブ内にマンドレルを介在してプレス圧縮成
形すれば局部座屈やしわの発生を防止できるが、マンド
レルを介在すると、その成形後に段差によってマンドレ
ルが抜けない。 そのため、マンドレルなしで変形する
必要があり、その結果、前記のような局部座屈やしわが
避けられないことになる。[Problems to be Solved by the Invention] As shown in FIG. 12, a tapered pipe 107 whose axis is straight
In the case where the tapered tube 108 is transformed by press compression molding into a tapered tube 108 whose axis is bent, the bent portion may be locally buckled or wrinkled, and may not be viable as a product. That is, if press compression molding is performed with a mandrel interposed within the vibrator, local buckling and wrinkles can be prevented from occurring, but if the mandrel is interposed, the mandrel will not come off due to the step after molding. Therefore, it is necessary to deform without a mandrel, and as a result, local buckling and wrinkles as described above are unavoidable.
そこで本発明は、ステアリングコラムを支持するりイン
ホースメントなどに使用される軸方向に屈曲するテーパ
管を、前記のような局部座屈やしわを発生させることな
く製造できる方法を提案することを目的とするものであ
る。Therefore, the present invention proposes a method for manufacturing a tapered tube that bends in the axial direction and is used for supporting a steering column or for reinforcement without causing local buckling or wrinkles as described above. This is the purpose.
本発明は前記の課題を解決するために、軸芯が屈曲する
テーパ管を形成できるように両側端形状を定めた展開状
の板材を用い、断面Ｕ状でかつその軸芯が軸方向に所定
の段差をもって屈曲するとともに軸方向に対してテーバ
状にしだ型溝を有する第１下曲型と、前記溝型に嵌合す
る突型部をもった第１上曲型とによって前記の板材を下
半部が半円で両側部が直立する断面Ｕ状の半製品に形成
し、次で、断面半円状でかつその軸芯が軸方向に所定の
段差をもって屈曲するとともに軸方向に対してテーパ状
にした下型溝を有する第２下曲型と、該第２下曲型の下
型溝と対称の上型溝を有する第２上曲型とによって前記
半製品の両側部を内方へ半円状に折曲して、軸方向に屈
曲したテーパ管を成形するようにしたことを特徴とする
ものである。In order to solve the above-mentioned problems, the present invention uses a developed plate material with both end shapes determined so as to form a tapered tube with a bent axis, and has a U-shaped cross section and a predetermined axis in the axial direction. The plate material is bent by a first lower curved mold having a tapered groove in the axial direction and a first upper curved mold having a protrusion that fits into the groove. It is formed into a semi-finished product with a U-shaped cross section with a semicircular lower half and upright sides, and then a semi-finished product with a semicircular cross section and an axis bent with a predetermined step in the axial direction. Both sides of the semi-finished product are inwardly formed by a second lower curved mold having a tapered lower mold groove and a second upper curved mold having an upper mold groove symmetrical to the lower mold groove of the second lower curved mold. It is characterized in that it is bent semicircularly to form a tapered tube bent in the axial direction.
［作用〕
先ず、基材から所定形状に切り出された第１図（Ａ）に
示すような板材（１）を、第１上下曲型（９）（１０）
により第１図（Ｂ）及び第８図に示すように下半部（４
）が半円でかつ両側部（５）（６）が直立状態で更に軸
芯が所定に屈曲した形状の半製品（７）に形成する。[Operation] First, a plate material (1) as shown in FIG.
As shown in Figure 1 (B) and Figure 8, the lower half (4
) is semicircular, both sides (5) and (6) are upright, and the axis is bent in a predetermined manner to form a semi-finished product (7).
次で該半製品（力を第２下曲型（１０）の下型溝（１２
ａ）内に嵌合して上方から第２上曲型（１１）により加
圧すると、第９図に示すように、両側部（５）（６）の
側端（５ａ） （６ａ）が第２上曲型（１１）における
半円状の上型溝（ｌｌａ）の曲面に沿って内方へ移動し
、両側部（５）（６）が、外方へわん曲した円弧状に折
曲される。Next, the semi-finished product (force is applied to the lower mold groove (12) of the second lower curved mold (10)
a) and pressurized from above with the second upper curved mold (11), the side ends (5a) (6a) of both side parts (5) and (6) 2. It moves inward along the curved surface of the semicircular upper mold groove (lla) in the upper curved mold (11), and both side parts (5) and (6) are bent outward into an arc shape. be done.
更に第２上曲型（１１）により加圧すると、側端（５ａ
）（６ａ）が相互に当接してその移動が阻止され、両側
部（５）（６）に外方へ逃げるようとする力が袴用し、
両側部（５）（６）は上型溝（ｌｌａ）の曲面に密着し
、上型溝（ｌｌａ）の曲面に沿った半円状に折曲形成さ
れる。Further, when pressure is applied by the second upper curved die (11), the side edge (5a
) (6a) come into contact with each other and their movement is blocked, and a force trying to escape outward is exerted on both sides (5) and (6),
Both side portions (5) and (6) are in close contact with the curved surface of the upper mold groove (lla) and are bent into a semicircular shape along the curved surface of the upper mold groove (lla).
また、同時に軸方向に対して所定の段差をもって屈曲さ
れる。 この結果、軸方向に所定の段差をもって屈曲し
たテーパ管が形成される。At the same time, it is bent with a predetermined step in the axial direction. As a result, a tapered tube is formed which is bent with a predetermined step in the axial direction.
本発明の製造方法の概略を第１図により説明する。 An outline of the manufacturing method of the present invention will be explained with reference to FIG.
先ず第１工程として第１図（Ａ）に示すような形状の板
材１を金属基板から切断形成する。 この板材１の左右
縁２，３の形状は、中央線Ｘ−Ｘ線を中心として左右対
称に形成され、かつこれを巻き完了した場合に、第１図
（Ｃ）に示すような軸芯Ｙ−Ｙが屈曲するテーパ管が形
成されるように、このテーパ管を展開した形状に形成さ
れている。First, as a first step, a plate material 1 having a shape as shown in FIG. 1(A) is cut from a metal substrate. The shapes of the left and right edges 2 and 3 of this plate material 1 are formed symmetrically with respect to the center line The tapered tube is formed into an expanded shape so that a tapered tube in which -Y is bent is formed.
次に第２工程として、前記の板材ｌをプレス成形により
、下半部４が半円状で両側部５，６が直立した第２図に
示すような半製品７を成形する。Next, in a second step, the plate material 1 is press-formed to form a semi-finished product 7 as shown in FIG. 2, in which the lower half 4 is semicircular and both sides 5 and 6 are upright.
次で、第３工程としてその両側部５．６をそれぞれプレ
スにて内方へ半円状に巻き込み、第３図に示すような断
面楕円形で軸芯Ｙ−Ｙが屈曲するテーパ管８を成形する
。Next, in the third step, both sides 5.6 are rolled inward in a semicircular shape using a press to form a tapered tube 8 with an elliptical cross section and a bent axis Y-Y as shown in FIG. Shape.
次に前記第２及び第３工程について詳述する。Next, the second and third steps will be explained in detail.
第２工程に使用する第１上下曲型は第３図乃至第４図示
すように形成されている。 第１下曲型１０における型
溝１０ａの軸方向と直交する方向の断面形状は、第３図
に示すように、前記板材１の中央部を半円状に折曲する
ための半円面１０ｂと、両側部５，６を直立状に折曲す
る鉛直面１０ｃ、 １０ｃとからなっている。 また、
底面１０ｂの軸方向の断面形状は、第４図に示すように
所定の段差を有するように屈曲形成されている。 更に
型溝１０ａの平面形状は第５図に示すように形成されて
いる。The first vertically curved mold used in the second step is formed as shown in FIGS. 3 and 4. As shown in FIG. 3, the cross-sectional shape of the first lower bending die 10 in the direction orthogonal to the axial direction of the die groove 10a is a semicircular surface 10b for bending the central part of the plate material 1 into a semicircular shape. and vertical surfaces 10c, 10c, which bend both side parts 5, 6 into an upright shape. Also,
The axial cross-sectional shape of the bottom surface 10b is bent to have a predetermined step, as shown in FIG. Furthermore, the planar shape of the mold groove 10a is formed as shown in FIG.
第１上曲型９の突型部９ａは、前記型溝１０ａに嵌合す
る形状に形成されている。The protruding part 9a of the first upper curved mold 9 is formed in a shape to fit into the mold groove 10a.
次に第３工程に使用する第２上下曲型は第６図及び第７
図に示すように形成されている。 第２下曲型工２は前
記第２工程に使用する第１下曲型１゜における型溝の半
円面１０ｂと同様な半円の下型溝１２ａを有している。Next, the second vertical curved mold used in the third step is shown in Figures 6 and 7.
It is formed as shown in the figure. The second lower curved mold 2 has a semicircular lower mold groove 12a similar to the semicircular surface 10b of the mold groove in the first lower curved mold 1° used in the second step.
第２上曲型１１には、前記第２下曲型１２の下型溝１
２ａと対向する上型溝１１ａが形成されているとともに
、その軸方向と直交する方向の断面形状は、前記下型溝
１２ａと対称的な半円形に形成されている。 また該上
型溝１１ａの軸方向の天面１１ｂは第７図に示すように
段差をもって屈曲する形状に形成されている。The second upper curved mold 11 has a lower mold groove 1 of the second lower curved mold 12.
An upper mold groove 11a facing the upper mold groove 2a is formed, and its cross-sectional shape in a direction perpendicular to the axial direction is formed in a semicircular shape symmetrical to the lower mold groove 12a. Further, the top surface 11b of the upper mold groove 11a in the axial direction is formed into a bent shape with a step difference, as shown in FIG.
尚第２上下曲型１１．１２における両型溝１１ａ、 １
２ａの平面形状は、前記第５図に示す下凸型１０の形状
と同様である。In addition, both mold grooves 11a, 1 in the second upper and lower curved molds 11.12
The planar shape of 2a is similar to the shape of the downward convex mold 10 shown in FIG. 5 above.
次に上記の各型を用いて成形する方法について第８図乃
至第１０図により説明する。Next, a method of molding using each of the above molds will be explained with reference to FIGS. 8 to 10.
先ず板材１を第２工程用の第１上下曲型９．１０によっ
て第８図のように断面Ｕ形に絞って半製品７を形成する
。 このとき、第１上下曲型９．１０における突出部９
ａと型溝１０ｂの底部が軸芯方向に屈曲しているので、
成形されたその半製品７の底部は第２図に示すように軸
芯方向に段差をもって屈曲する。 次で、この半製品７
の底部側である下半部４を第３工程用の第２下曲型１２
の下型溝１２ａ内に第９図に示すように嵌合してセット
する。First, a semi-finished product 7 is formed by squeezing the plate material 1 into a U-shaped cross section as shown in FIG. 8 using a first vertically curved die 9.10 for the second step. At this time, the protrusion 9 in the first vertically curved mold 9.10
a and the bottom of the mold groove 10b are bent in the axial direction,
The bottom of the molded semi-finished product 7 is bent with a step in the axial direction as shown in FIG. Next, this semi-finished product 7
The lower half 4, which is the bottom side of the
Fit and set in the lower mold groove 12a as shown in FIG.
次で、第３工程用の第２上曲型１１を第２下曲型１２の
上方から押圧する。 すると、前記の半製品７の両側端
５ａ、 ６ａは、第２上曲型１１における上型溝１１ａ
の曲面に案内されて夫々内方へ巻き込み移動され、第９
図に示すように中央部において相互に当接する。 この
とき、両側部５．６は外方へわん曲した円弧状に折曲さ
れる。 次で、第２上曲型１１を更に下降させると、両
側端５ａ、 ６ａが相互に当接した状態で該両側端５ａ
、 ６ａに下方への押圧力が作用するため、その両側部
５．６には、第１０図の矢印で示すように外方へ逃げよ
うとする力が作用し、その両側部５．６は内方へ局部座
屈することなく外方へ張り出して上型溝１１ａの内曲面
に密接し、その上型溝１１ａに沿った半円形に折曲形成
される。 また、下半部４も半円状の型溝１２ａで保持
されるため局部座屈は生じない。 その結果、前記の半
製品７は第１０図に示すような円形断面に形成される。Next, the second upper curved mold 11 for the third step is pressed from above the second lower curved mold 12. Then, both ends 5a and 6a of the semi-finished product 7 are connected to the upper mold groove 11a in the second upper curved mold 11.
are guided by the curved surfaces of the 9th
They abut each other at the center as shown in the figure. At this time, both sides 5.6 are bent outward into an arc shape. Next, when the second upper curved die 11 is further lowered, both ends 5a and 6a are brought into contact with each other, and the both ends 5a are brought into contact with each other.
, Since a downward pressing force acts on 6a, a force that tries to escape outward as shown by the arrows in FIG. 10 acts on both sides 5.6, and It protrudes outward without locally buckling inward, comes into close contact with the inner curved surface of the upper mold groove 11a, and is bent into a semicircular shape along the upper mold groove 11a. Further, since the lower half portion 4 is also held by the semicircular mold groove 12a, local buckling does not occur. As a result, the semi-finished product 7 is formed to have a circular cross section as shown in FIG.
また、第２上下曲型１１．１２の上下の型溝が軸方向
に対して所定に段差をもって屈曲形成されていることと
、テーパ状に形成されていることより、前記の円形の折
曲形成と同時に軸方向に対する所定の屈曲とテーパが形
成される。In addition, since the upper and lower mold grooves of the second vertical bending mold 11 and 12 are bent with a predetermined step in the axial direction and are formed in a tapered shape, the above-mentioned circular bending can be formed. At the same time, a predetermined bend and taper in the axial direction are formed.
そして、両側端５ａ、 ６ａを相互に溶接結合して第１
図（Ｃ）のような軸芯が屈曲するテーパ管８を形成する
。Then, both ends 5a and 6a are welded together and the first
A tapered tube 8 having a bent axis as shown in Figure (C) is formed.
尚、前記のテーパ管をワインホースメントの大径部とし
て使用する場合は、前記のテーパ管を更にプレスにて若
干変形して、第２図のイに示すように使用する。In addition, when using the above-mentioned tapered pipe as a large diameter part of a wine hosement, the above-mentioned tapered pipe is further deformed slightly by pressing and used as shown in FIG. 2A.
また、板材１を、リインホースメントの大径部イと小径
部口を一体的に形成できる形状とし、上下凸型を大径部
イと小径部口とを前記のように折曲加工できる型にすれ
ば、大径部イと小径部口とが同時に一体的成形できる。In addition, the plate material 1 is shaped so that the large diameter part A and the small diameter part opening of the reinforcement can be integrally formed, and the upper and lower convex type is shaped so that the large diameter part A and the small diameter part opening can be bent as described above. By doing so, the large diameter part A and the small diameter part opening can be integrally molded at the same time.
前記実施例は、本発明を自動車におけるステアリングコ
ラム支持用のりインホースメントの製造に適用した場合
を示したが、本発明は、このリインホースメントに限ら
ず、その他の軸芯が屈曲するテーパ管を製法する場合に
適用できることは勿論である。The above embodiments show a case in which the present invention is applied to manufacturing a glue reinforcement for supporting a steering column in an automobile, but the present invention is not limited to this reinforcement, but can be applied to other tapered pipes with a bent axis. Of course, it can be applied to the manufacturing method.
以上のように本発明によれば、軸芯が屈曲するテーパ管
を、板材から局部座屈やしわを発生させることなく容易
に成形できる。As described above, according to the present invention, a tapered tube with a bent axis can be easily formed from a plate material without causing local buckling or wrinkles.
第１図（Ａ）、 （Ｂ）、 （Ｃ）は本発明の工程の概
略を示す斜視図、第２図はりインホースメントの斜視図
、第３図は第２工程用の第１上下曲型を示す正面図、第
４図は第３図におけるＴＶ−ＩＶ線断面図、第５図は第
１下曲型の平面図、第６図は第２工程用の第２上下曲型
の正面図、第７図は第６図における■−■線断面図、第
８図乃至第１０図は製品の折曲加工状態を示す各断面図
、第１１図及び第１２図（Ａ）、 （Ｂ）、 （Ｃ）は
従来構造を示す各斜視図である。
１・・・板材、４・・・下半部、５，６・・・両側部、
７・・・半製品、８・・・屈曲するテーバ管、９．１０
・・・第１上下曲型、９ａ・・・突型部、１０ａ・・・
型溝、１１．１２・・・第２上下曲型、ｌｌａ・・・上
型溝、１２ａ・・・下型溝、Ｙ−Ｙ・・・軸芯Figures 1 (A), (B), and (C) are perspective views showing the outline of the process of the present invention, Figure 2 is a perspective view of the beam reinforcement, and Figure 3 is the first vertical bend for the second process. A front view showing the mold, FIG. 4 is a sectional view taken along the line TV-IV in FIG. 3, FIG. 5 is a plan view of the first lower curved mold, and FIG. 6 is a front view of the second upper and lower curved mold for the second process. 7 is a sectional view taken along the line ■-■ in FIG. ) and (C) are perspective views showing conventional structures. 1... Plate material, 4... Lower half, 5, 6... Both sides,
7... Semi-finished product, 8... Bent Taber tube, 9.10
...first vertical curve, 9a...protrusion, 10a...
Mold groove, 11.12...Second vertical curved mold, lla...Upper die groove, 12a...Lower die groove, Y-Y...Axis center
Claims (1)
を定めた展開状の板材を用い、断面Ｕ状でかつその軸芯
が軸方向に所定の段差をもって屈曲するとともに軸方向
に対してテーパ状にした型溝を有する第１下曲型と、前
記溝型に嵌合する突型部をもった第１上曲型とによって
前記の板材を下半部が半円で両側部が直立する断面Ｕ状
の半製品に形成し、次で、断面半円状でかつその軸芯が
軸方向に所定の段差をもって屈曲するとともに軸方向に
対してテーパ状にした下型溝を有する第２下曲型と、該
第２下曲型の下型溝と対称の上型溝を有する第２上曲型
とによって前記半製品の両側部を内方へ半円状に折曲し
て、軸方向に屈曲したテーパ管を成形するようにしたこ
とを特徴とする板材から軸芯が屈曲するテーパ管を製造
する方法。A developed plate material with both end shapes determined so as to form a tapered tube with a bent axis is used, and the cross section is U-shaped, the axis is bent with a predetermined step in the axial direction, and is tapered in the axial direction. A first lower curved mold having a shaped groove and a first upper curved mold having a protruding part that fits into the groove mold make the plate material have a semicircular lower half and upright sides. A second lower mold is formed into a semi-finished product having a U-shaped cross section, and has a lower mold groove having a semicircular cross section, the axis of which is bent with a predetermined step in the axial direction, and tapered in the axial direction. Both sides of the semi-finished product are bent inwardly into a semicircular shape by a curved mold and a second upper curved mold having an upper mold groove symmetrical to the lower mold groove of the second lower curved mold. 1. A method for manufacturing a tapered tube with a bent axis from a plate material, characterized in that the tapered tube is formed with a bent axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090558A JPH0763758B2 (en) | 1990-04-04 | 1990-04-04 | Method for manufacturing a tapered pipe whose axis is bent from a plate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090558A JPH0763758B2 (en) | 1990-04-04 | 1990-04-04 | Method for manufacturing a tapered pipe whose axis is bent from a plate material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03291115A true JPH03291115A (en) | 1991-12-20 |
| JPH0763758B2 JPH0763758B2 (en) | 1995-07-12 |
Family
ID=14001744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2090558A Expired - Lifetime JPH0763758B2 (en) | 1990-04-04 | 1990-04-04 | Method for manufacturing a tapered pipe whose axis is bent from a plate material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0763758B2 (en) |
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| EP0788848A1 (en) * | 1996-02-07 | 1997-08-13 | Benteler Ag | Method of manufacturing a tube with variable cross-section |
| NL1014823C2 (en) * | 2000-04-03 | 2001-10-04 | Corus Staal Bv | Method of manufacturing a tubular part. |
| DE10062836A1 (en) * | 2000-12-17 | 2002-06-27 | Hubert Schliekmann Gmbh | Tubular hollow body producing process involves stamping workpiece from sheet, bending it in a countersink bending device and shaping bent workpiece in press tool |
| WO2003011489A1 (en) * | 2001-07-25 | 2003-02-13 | GFU-Gesellschaft für Umformung und Maschinenbau GmbH | Method for the production of a metal tube, in particular a gas distributor tube for vehicle airbags |
| JP2007263080A (en) * | 2006-03-29 | 2007-10-11 | Toyota Motor Corp | Manufacturing method of stepped tube |
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| WO2013124198A1 (en) * | 2012-02-23 | 2013-08-29 | Coskunoz Metal Form Makina Endustri Ve Tic. A.S. | A method for producing a vehicle component which is in bent hollow pipe form |
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| JPWO2013111308A1 (en) * | 2012-01-26 | 2015-05-11 | 株式会社ヨロズ | Method for manufacturing curved hollow pipe |
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| JPWO2013111308A1 (en) * | 2012-01-26 | 2015-05-11 | 株式会社ヨロズ | Method for manufacturing curved hollow pipe |
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| CN107073542B (en) * | 2014-10-03 | 2019-03-29 | 新日铁住金株式会社 | The manufacturing method and compression moulding product of compression moulding product |
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| JP2016217174A (en) * | 2015-05-15 | 2016-12-22 | タン エン クエＴａｎ Ｅｎｇ Ｋｗｅｅ | Muffler of automobile |
| JP2017217661A (en) * | 2016-06-06 | 2017-12-14 | 新日鐵住金株式会社 | Manufacturing method of closed cross-section structure member and upper die for o forming |
| EP3363663A1 (en) * | 2017-02-15 | 2018-08-22 | C.M.S. S.p.A. | Method for realizing pieces with complex gerometry by means of plastic deformation |
| EP3656480A3 (en) * | 2018-09-24 | 2020-06-24 | Benteler Automobiltechnik GmbH | U-o shaping of a component curved around three spatial axes |
| US11577294B2 (en) | 2018-09-24 | 2023-02-14 | Benteler Automobiltechnik Gmbh | U-O forming of a component curved about three spatial axes |
| CN112743294A (en) * | 2019-10-30 | 2021-05-04 | 双叶产业株式会社 | Method for manufacturing tube |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPH0763758B2 (en) | 1995-07-12 |
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