JPH07178479A - Tube expanding device - Google Patents
Tube expanding deviceInfo
- Publication number
- JPH07178479A JPH07178479A JP32183193A JP32183193A JPH07178479A JP H07178479 A JPH07178479 A JP H07178479A JP 32183193 A JP32183193 A JP 32183193A JP 32183193 A JP32183193 A JP 32183193A JP H07178479 A JPH07178479 A JP H07178479A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe
- load
- disc
- axial direction
- 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.)
- Withdrawn
Links
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は拡管装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube expanding device.
【0002】[0002]
【従来の技術】従来、金属製の管を、その一部において
半径方向に膨出させる拡管装置として、加工される管に
おける膨出部の内部にゴム等の高分子弾性材からなる成
形子を入れ、これを加圧手段により軸方向に圧縮し、そ
の成形子の半径方向への膨出により管の一部を半径方向
に膨出させる、いわゆるゴムバルジ加工による拡管装置
がある。2. Description of the Related Art Conventionally, as a pipe expanding device for partially bulging a metal pipe in a radial direction, a molding element made of a polymer elastic material such as rubber is provided inside the bulging portion of the pipe to be processed. There is a pipe expanding device by so-called rubber bulging, in which a tube is inserted, compressed in the axial direction by a pressurizing means, and a part of the pipe is expanded in the radial direction by the expansion of the molding element in the radial direction.
【0003】このような拡管装置においては、管の膨出
部における軸方向ひずみを小さくするために、その成形
子の圧縮と同時に管の軸方向へ押し込むようにしてい
る。このような拡管装置として、従来、図4に示すよう
に、膨出用凹部1を形成した外型2内に加工される管3
を入れ、該管3内にゴム等からなる成形子4を挿入し、
これを第1の加圧手段5で軸方向に圧縮すると共に第2
の加圧手段5′で管3の押し込みを行うようにしたもの
がある。In such a tube expanding device, in order to reduce the axial strain in the bulging portion of the tube, the molding element is pressed in the axial direction of the tube simultaneously with the compression. As such a pipe expanding device, conventionally, as shown in FIG. 4, a pipe 3 processed in an outer mold 2 in which a bulging concave portion 1 is formed.
And insert a molding element 4 made of rubber or the like into the tube 3,
This is axially compressed by the first pressurizing means 5 and the second
There is a pressurizing means 5'for pushing the tube 3 in.
【0004】また、図5に示すように、膨出用凹部1を
形成した外型2内に管3を挿入し、該管3内にゴム等か
らなる成形子4を入れて、加圧手段6のロッド7で上記
成形子4を加圧して半径方向に膨出させると同時に、加
圧手段6に形成した係止部6aとプッシャー8間にウレ
タンゴム9を介在し、ロッド7の加圧作動と同時にウレ
タンゴム9を加圧して、プッシャー8を介して管3の押
し込みを行うようにしたものもある。尚、図5の左半面
は加圧作動前の状態を示し、右半面は加圧作動状態を示
す。Further, as shown in FIG. 5, a tube 3 is inserted into an outer mold 2 having a bulging recess 1 formed therein, and a molding element 4 made of rubber or the like is placed in the tube 3 to apply a pressing means. The molding member 4 is pressed by the rod 7 of No. 6 to swell in the radial direction, and at the same time, the urethane rubber 9 is interposed between the engaging portion 6a formed on the pressing means 6 and the pusher 8 to press the rod 7. In some cases, the urethane rubber 9 is pressurized at the same time as the operation, and the tube 3 is pushed in via the pusher 8. The left half surface of FIG. 5 shows the state before the pressurizing operation, and the right half surface shows the pressurizing operation state.
【0005】[0005]
【発明が解決しようとする課題】上記図4に示す従来構
造においては、成形子の加圧手段と管の押し込み用の加
圧手段の2つのシリンダー等からなる加圧手段が必要に
なり、また、これらの加圧手段を作動する油圧を制御す
る手段も別個に必要になり、装置の大型化及び複雑化、
更にはこれに伴ってコスト高を招く問題がある。In the conventional structure shown in FIG. 4, the pressurizing means including two cylinders such as the pressurizing means for the compactor and the pressurizing means for pushing the tube is required. , The means for controlling the hydraulic pressure for operating these pressurizing means is also required separately, which makes the apparatus large and complicated,
Further, there is a problem that this leads to a high cost.
【0006】また、図5に示す従来構造のものにおいて
は、加圧手段が1つで足りるが、管3の押し込みをウレ
タンゴム9を介して行うことから、次のような問題があ
る。ウレタンゴムは、これに荷重を付与した場合のその
荷重と荷重方向の変形との関係の特性は、図7に示すよ
うに、必ずしも変形量が荷重に対してリニアではなく複
雑な特性を有する。Further, in the conventional structure shown in FIG. 5, one pressing means is sufficient, but since the tube 3 is pushed in via the urethane rubber 9, there are the following problems. As shown in FIG. 7, the characteristic of the relationship between the load and the deformation of the urethane rubber when the load is applied to the urethane rubber is not always linear with respect to the load, but has a complicated property.
【0007】そのため、管3の材質、肉厚、膨出量等が
異なる種々な管を膨出加工する場合において、その管の
押し込み量を変更する場合に、単にウレタンゴム9の個
数を変更するのみでは対応できず、種々な特性のウレタ
ンゴムを用意してこれを算定して組合せる必要があり、
その押し込み量の制御が困難である。Therefore, when various pipes having different materials, wall thickness, bulging amount, etc. are bulged, the number of urethane rubbers 9 is simply changed when the pushing amount of the pipes is changed. It is not possible to deal with it alone, it is necessary to prepare urethane rubber with various characteristics and calculate and combine it,
It is difficult to control the pushing amount.
【0008】また、ウレタンゴムは金属材に比べて耐久
性も劣る問題もある。そこで本発明は、1つの加圧手段
により管の膨出作用と押し込み作用が行え、かつ管の押
し込み量の変更に際しても容易にその押し込み量を設定
できるようにして、上記の問題を解決できる拡管装置を
提供することを目的とするものである。Further, urethane rubber also has a problem that it is inferior in durability to metal materials. In view of the above, the present invention can solve the above-mentioned problems by allowing one pressurizing means to perform the swelling action and the pushing action of the tube and to easily set the pushing amount even when the pushing amount of the tube is changed. The purpose is to provide a device.
【0009】[0009]
【課題を解決するための手段】本発明は上記の課題を解
決するために、第1の発明は、加工される管内に挿入さ
れた弾性体からなる成形子を、管の軸方向に圧縮して半
径方向に膨脹させると同時に管に軸方向の圧縮力を付加
して管を拡張させる拡管装置において、上記成形子(1
7)の加圧手段(14)による荷重を管(13)の端部
に伝達する伝達手段を設け、該伝達手段の一部に、皿状
バネ(20)を介在し、荷重が皿状バネ(20)を介し
て管(13)の端部に伝達されるようにしたことを特徴
とするものである。SUMMARY OF THE INVENTION In order to solve the above problems, the first invention is to compress a molding element made of an elastic body inserted in a pipe to be processed in the axial direction of the pipe. In the tube expanding device that expands the tube by applying a compressive force in the axial direction to the tube while expanding the tube in the radial direction,
A transmission means for transmitting the load by the pressure means (14) of 7) to the end of the pipe (13) is provided, and a disc-shaped spring (20) is interposed in a part of the transmission means, and the load is the disc-shaped spring. It is characterized in that it is transmitted to the end of the pipe (13) via (20).
【0010】第2の発明は、上記の皿状バネ(20)を
複数枚、並列的に又は直列的に又はこれらの組合せの状
態に介在したことを特徴とするものである。A second aspect of the present invention is characterized in that a plurality of the above-mentioned disc-shaped springs (20) are interposed in parallel, in series, or in a combination thereof.
【0011】[0011]
【作用】成形子(17)の加圧手段(14)による荷重
が皿状バネ(20)により制御されて管(13)の端部
に伝達され、管(13)が押し込まれる。また、皿状バ
ネ(20)は、これに付加される荷重に対してリニアに
ひずむ特性を有し、かつ、その重ね枚数、並列的な重
ね、直列的な重ねにより、荷重とひずみが単純に変化す
る特性を有する。The load of the pressurizing means (14) of the compactor (17) is controlled by the disc spring (20) and transmitted to the end of the pipe (13), and the pipe (13) is pushed. Further, the disc-shaped spring (20) has a characteristic that it is linearly distorted with respect to the load applied to it, and the load and strain are simplified by the number of layers, parallel layers and series layers. Has changing characteristics.
【0012】そのため、皿状バネ(20)の組合せ方に
より、荷重とひずみ(ストローク)との関係を単純に算
定して変更できる。したがって、成形子(17)を加圧
するための加圧手段のストロークに対して管を押し込む
荷重を制御することが容易に行える。Therefore, the relationship between the load and the strain (stroke) can be simply calculated and changed by the combination of the disc springs (20). Therefore, it is possible to easily control the load for pushing the tube with respect to the stroke of the pressurizing means for pressurizing the compactor (17).
【0013】[0013]
【実施例】次に図1乃至図3に示す本発明の実施例につ
いて説明する。10は固定の基台で、これに外型11が
固着されている。該外型11には膨出用凹部12が形成
されている。尚、該外型11は管の膨出加工後に、その
管を容易に脱型しやすいように割り型に形成されてい
る。EXAMPLES Next, examples of the present invention shown in FIGS. 1 to 3 will be described. Reference numeral 10 is a fixed base to which an outer mold 11 is fixed. A bulging recess 12 is formed in the outer mold 11. The outer mold 11 is formed as a split mold so that the tube can be easily removed from the mold after the tube is bulged.
【0014】13は膨出加工される金属管で、その膨出
すべき部分が上記膨出用凹部12に位置するようにして
外型11内に設置される。14は油圧シリンダー等から
なる加圧手段で、これを加圧作動させることにより、上
皿15が図1において下動するようになっている。該上
皿15の中央下面にはロッド16が固設されており、そ
の下部にゴム等の高分子弾性材からなる成形子17が具
備されている。Reference numeral 13 denotes a metal tube to be bulged, which is installed in the outer mold 11 such that the portion to be bulged is located in the bulging recess 12. Reference numeral 14 is a pressurizing means composed of a hydraulic cylinder or the like, and by pressurizing the pressurizing means, the upper plate 15 is moved downward in FIG. A rod 16 is fixedly provided on the lower surface of the center of the upper plate 15, and a compactor 17 made of a polymer elastic material such as rubber is provided below the rod 16.
【0015】18はロッド16に備えた加圧子で、ロッ
ド16の下降により加圧子18を介して成形子17を軸
方向に加圧し、半径方向に膨脹させるようになってい
る。19はロッド16に摺動可能に遊嵌したプッシャー
で、その下部が、外型11内にセットした管13を下方
へ押し込みできるように管13の上端部に嵌合し、かつ
管13の上端に当接係止するようになっている。更に該
プッシャー19の上部は鍔状に形成され、その上面が皿
バネ受け面19aとなっている。Reference numeral 18 denotes a pressurizing member provided on the rod 16, and when the rod 16 descends, the pressurizing member 18 is axially pressed through the pressurizing member 18 to expand in the radial direction. Numeral 19 is a pusher slidably fitted on the rod 16 and the lower part of which is fitted to the upper end of the pipe 13 so that the pipe 13 set in the outer mold 11 can be pushed downward, and the upper end of the pipe 13. It is designed to come into contact with and to be locked. Further, the upper portion of the pusher 19 is formed in a brim shape, and the upper surface thereof serves as a disc spring receiving surface 19a.
【0016】20は上記上皿15とプッシャー19に夫
々形成したバネ受け面15aと19a間に介在した皿状
バネで、ロッド16の軸方向にたわむように設置されて
いる。該皿状バネ20は、1枚或いは複数枚重合して設
置される。21はロッド16と皿状バネ20間に介在し
た案内管である。Reference numeral 20 is a disc-shaped spring interposed between the spring receiving surfaces 15a and 19a formed on the upper plate 15 and the pusher 19, respectively, and is installed so as to bend in the axial direction of the rod 16. One or a plurality of the disc-shaped springs 20 are stacked and installed. Reference numeral 21 is a guide tube interposed between the rod 16 and the disc-shaped spring 20.
【0017】次に本実施例の作用について説明する。図
1に示すように膨出加工すべき金属管13を外型11内
にセットし、成形子17を管13内に挿入設置した状態
で加圧手段14により、上皿15を介してロッド16を
下降させると、加圧子18がゴム等の高分子弾性材から
なる成形子17をその軸方向に圧縮する。これにより、
成形子17がその半径方向に膨脹し、膨出用凹部12に
位置する部分の金属管13を膨出用凹部12内に膨出さ
せる。Next, the operation of this embodiment will be described. As shown in FIG. 1, the metal tube 13 to be bulged is set in the outer mold 11, and the compactor 17 is inserted and installed in the tube 13 by the pressing means 14 through the upper plate 15 and the rod 16 When is lowered, the pressurizer 18 compresses the molding member 17 made of a polymeric elastic material such as rubber in the axial direction. This allows
The molding element 17 expands in the radial direction, and the portion of the metal tube 13 located in the bulging recess 12 bulges into the bulging recess 12.
【0018】また、上記の加圧手段14による上皿15
の下降により皿状バネ20が圧縮され、その皿状バネ2
0はその軸方向にたわむと同時にプッシャー19を介し
て管13に軸方向の荷重を付加し、管13が軸方向に圧
縮される。Further, the upper plate 15 by the above-mentioned pressurizing means 14
The disc-shaped spring 20 is compressed by the downward movement of the
0 bends in the axial direction and, at the same time, applies an axial load to the pipe 13 via the pusher 19, and the pipe 13 is compressed in the axial direction.
【0019】このとき、皿状バネ20に付加される荷重
と皿状バネ20のたわみ量との関係は、皿状バネ20が
1枚の場合には図6のような特性を有する。すなわち、
皿状バネ20のたわみ量は付加される荷重に比例したリ
ニアに近い特性を有する。At this time, the relationship between the load applied to the disc-shaped spring 20 and the amount of deflection of the disc-shaped spring 20 has the characteristic shown in FIG. 6 when the number of the disc-shaped spring 20 is one. That is,
The amount of deflection of the disc-shaped spring 20 has a characteristic that is almost linear in proportion to the applied load.
【0020】更に、この皿状バネ20を複数枚並列的に
配置した場合及び複数枚直列的に配置した場合の荷重と
たわみ量との関係の特性を図3に示す。尚、並列的とは
図2(a)のような配列をいい、直列的とは図2の
(b)のような配列をいう。Further, FIG. 3 shows the characteristics of the relationship between the load and the amount of deflection when a plurality of the disc-shaped springs 20 are arranged in parallel and a plurality of the disc-shaped springs 20 are arranged in series. In addition, parallel means an arrangement as shown in FIG. 2 (a), and serial means an arrangement as shown in FIG. 2 (b).
【0021】図3において、Aは1枚の場合、Bは2枚
並列の場合、Cは3枚並列の場合、Dは1枚のものを4
段直列に配列した場合、Eは2枚並列のものを4段に配
列した場合、Fは3枚並列のものを4段直列に配列した
場合の夫々の特性を示す。この特性から分るように、並
列の場合は、同じたわみ量であっても荷重が枚数倍にな
る。また直列の場合は、同じ枚数の並列のものと比較し
て、同じ荷重であっても直列の段数倍たわみ、その荷重
とたわみ量はリニアに増減する。In FIG. 3, A is one, B is two in parallel, C is three in parallel, and D is one.
In the case of arranging two stages in parallel, E shows the characteristics in the case of arranging two sheets in parallel in four stages, and F shows the characteristics in the case of arranging three sheets in parallel in four stages. As can be seen from this characteristic, in the case of the parallel arrangement, the load is doubled even with the same amount of deflection. Further, in the case of the serial connection, as compared with the parallel connection of the same number, even if the load is the same, the deflection is increased by the number of stages in the series, and the load and the deflection amount increase and decrease linearly.
【0022】以上のことから、皿状バネの枚数と重ね方
を所望に選定することにより、荷重と軸方向のたわみ、
すなわちストロークの関係を所望に設定することがで
き、また、その設定も前記ウレタンゴム材に比較して極
めて容易に行える。From the above, by selecting the number of disc springs and the stacking method as desired, the deflection of the load and the axial direction,
That is, the relationship of strokes can be set as desired, and the setting can be made extremely easily as compared with the urethane rubber material.
【0023】したがって、図1のように介在される皿状
バネ20の枚数と重ね方(並列的、直列的)を所望に選
定することにより、成形子17の圧縮荷重、すなわちロ
ッド16の加圧ストロークに対する管13の押し込み
量、すなわち管の圧縮荷重を所望に選定できる。Therefore, the compression load of the compactor 17, that is, the pressurization of the rod 16 is selected by selecting the number of the disc-shaped springs 20 and the stacking method (parallel or serial) to be interposed as shown in FIG. The pushing amount of the pipe 13 with respect to the stroke, that is, the compressive load of the pipe can be selected as desired.
【0024】また、皿状バネ20の枚数と重ね方を種々
組合せることにより、ロッド16の加圧ストロークに対
する管13の圧縮荷重の制御が行える。更に、その荷重
制御は、皿状バネの荷重とひずみ量の関係がリニアに変
化するので、単に皿状バネの枚数と重ね方で容易に算定
できる。Further, the compression load of the tube 13 with respect to the pressing stroke of the rod 16 can be controlled by variously combining the number of the disc springs 20 and the stacking method. Further, in the load control, since the relationship between the load and the strain amount of the disc spring changes linearly, it can be easily calculated simply by the number of the disc springs and the stacking method.
【0025】以上のように制御された荷重により管13
が軸方向に圧縮されると、その管13の膨出部に管材が
押し送られ、その膨出部における軸方向のひずみが防止
される。The pipe 13 is controlled by the load controlled as described above.
Is compressed in the axial direction, the pipe material is pushed into the bulging portion of the tube 13, and axial strain in the bulging portion is prevented.
【0026】[0026]
【発明の効果】以上のように本発明によれば、成形子の
圧縮作用と管の圧縮作用を1つの加圧手段により行え
る。また、加圧手段が1つであることは、加圧手段を制
御する手段も1つでよい。したがって、前記従来のよう
に、加圧手段とその制御手段を夫々2つ設けるものに比
べて、装置の小型化、簡略化更にはコストの低減化を図
ることができる。As described above, according to the present invention, the compression action of the compactor and the compression action of the tube can be performed by one pressurizing means. In addition, the fact that there is only one pressurizing means also means that there is only one means for controlling the pressurizing means. Therefore, it is possible to reduce the size and simplification of the apparatus, and further to reduce the cost, as compared with the prior art in which two pressurizing means and two controlling means are provided.
【0027】更に、成形子を圧縮する加圧手段のストロ
ークに対する管の圧縮荷重量を単純な皿状バネの組合せ
により、容易に制御することができる。更に、皿状バネ
を使用することにより、ウレタンゴム材に比べて耐久性
が向上する。Furthermore, the amount of compressive load on the pipe with respect to the stroke of the pressurizing means for compressing the compact can be easily controlled by combining a simple disc spring. Further, the use of the disc-shaped spring improves the durability as compared with the urethane rubber material.
【図1】 本発明の実施例を示す縦断面図。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図2】 皿状バネの重ね状態を示す断面図で、(a)
は並列状態、(b)は直列状態を示す。FIG. 2 is a cross-sectional view showing a state in which the disc-shaped springs are stacked, (a)
Indicates a parallel state, and (b) indicates a serial state.
【図3】 皿状バネの組合せ状態による荷重とたわみの
関係を示す特性図。FIG. 3 is a characteristic diagram showing a relationship between load and deflection depending on a combination state of the disc-shaped springs.
【図4】 従来の拡管装置を示す断面図。FIG. 4 is a cross-sectional view showing a conventional tube expanding device.
【図5】 従来の更に他の拡管装置を示す断面図。FIG. 5 is a sectional view showing still another conventional tube expanding device.
【図6】 皿状バネの荷重とひずみの関係を示す特性
図。FIG. 6 is a characteristic diagram showing the relationship between the load and strain of the disc-shaped spring.
【図7】 従来のウレタンゴムの荷重とひずみの関係を
示す特性図。FIG. 7 is a characteristic diagram showing a relationship between load and strain of conventional urethane rubber.
13…管 14…加圧手段 15…上皿 16…ロッド
17…成形子 19…プッシャー 20…皿状バネ13 ... Pipe 14 ... Pressurizing means 15 ... Upper plate 16 ... Rod 17 ... Molding element 19 ... Pusher 20 ... Disc-shaped spring
Claims (2)
なる成形子を、管の軸方向に圧縮して半径方向に膨脹さ
せると同時に管に軸方向の圧縮力を付加して管を拡張さ
せる拡管装置において、上記成形子の加圧手段による荷
重を管の端部に伝達する伝達手段を設け、該伝達手段の
一部に、皿状バネを介在し、荷重が皿状バネを介して管
の端部に伝達されるようにしたことを特徴とする拡管装
置。1. A pipe formed by an elastic body inserted into a pipe to be processed is compressed in the axial direction of the pipe and expanded in the radial direction, and at the same time, an axial compressive force is applied to the pipe to expand the pipe. In the pipe expanding device, a transmission means for transmitting the load by the pressing means of the molding element to the end portion of the pipe is provided, and a disc-shaped spring is interposed in a part of the transmission means, and the load is transmitted through the disc-shaped spring. A pipe expanding device characterized by being transmitted to an end of a pipe.
列的に又は直列的に又はこれらの組合せの状態に介在し
たことを特徴とする拡管装置。2. A pipe expanding device, wherein a plurality of disc-shaped springs according to claim 1 are interposed in parallel, in series, or in a combination thereof.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32183193A JPH07178479A (en) | 1993-12-21 | 1993-12-21 | Tube expanding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32183193A JPH07178479A (en) | 1993-12-21 | 1993-12-21 | Tube expanding device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07178479A true JPH07178479A (en) | 1995-07-18 |
Family
ID=18136915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP32183193A Withdrawn JPH07178479A (en) | 1993-12-21 | 1993-12-21 | Tube expanding device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07178479A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101856696A (en) * | 2010-06-02 | 2010-10-13 | 无锡新得宝金属软管有限公司 | Double-end sizing mill |
CN107962337A (en) * | 2018-01-26 | 2018-04-27 | 陈烁 | Easily free strut |
CN111633133A (en) * | 2020-06-11 | 2020-09-08 | 宋明远 | Pipe expanding device for bicycle handlebar production and use method thereof |
-
1993
- 1993-12-21 JP JP32183193A patent/JPH07178479A/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101856696A (en) * | 2010-06-02 | 2010-10-13 | 无锡新得宝金属软管有限公司 | Double-end sizing mill |
CN107962337A (en) * | 2018-01-26 | 2018-04-27 | 陈烁 | Easily free strut |
CN111633133A (en) * | 2020-06-11 | 2020-09-08 | 宋明远 | Pipe expanding device for bicycle handlebar production and use method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU1829978C (en) | Sheet forming method and device for effecting the same | |
JPH04210826A (en) | Producing device for cathoderay tube mask and its method | |
US5272898A (en) | Device for stamping materials in sheet form, especially sheet metal blanks | |
JP3949057B2 (en) | Hydraulic mechanical closure device | |
JP2023547496A (en) | Method for edge forming cellulosic products in a mold system and mold system for edge forming cellulosic products | |
JPH07178479A (en) | Tube expanding device | |
JP2001314926A (en) | Apparatus for cutting out cutout section from wall section of component member formed as hollow body while component member is manufactured based on internal high tension forming method | |
US5490407A (en) | Method of and apparatus for the shaping of stainless steel membranes for vacuum-heat-insulation elements | |
US5320331A (en) | Method and apparatus for forming corrugations in tubing and a corrugated tube produced thereby | |
JPH07275962A (en) | Device for drawing sheet material | |
EP0894589A1 (en) | Method for forming ceramic tiles, including those of large dimensions, and a device for implementing the method | |
US7448429B2 (en) | Method for squeezing foundry sand, a match plate, and an upper and a lower flask | |
EP1539394B1 (en) | Device and method for expansion forming | |
JP2982412B2 (en) | Shadow mask mold | |
JP3769350B2 (en) | Corrugated bulge forming method for pipe and corrugated bulge forming apparatus for pipe | |
JP2663291B2 (en) | Wrinkle holder, knockout mechanism and method of circular drawing press type | |
JP3504513B2 (en) | Mold | |
WO1992001171A2 (en) | Spring device | |
JPH08300059A (en) | Die cushion device in press machine | |
RU2042452C1 (en) | Method of shaping thin-sheet large-size products and punch of ram press for performing the method | |
JP7514741B2 (en) | Mold with valve function and manufacturing method for tubular molded products | |
CN210436675U (en) | Pressing mechanism for providing reverse stress | |
JP2011177730A (en) | Molding method and molding device of metal tube using bulging processing | |
JPH0666823U (en) | Press molding equipment | |
CN106553378A (en) | The electrichydraulic control press of steady pressure is provided |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010306 |