JPH06198358A - Method and device for fixing tubular reinforcing insert into tubular metal structure - Google Patents
Method and device for fixing tubular reinforcing insert into tubular metal structureInfo
- Publication number
- JPH06198358A JPH06198358A JP5252901A JP25290193A JPH06198358A JP H06198358 A JPH06198358 A JP H06198358A JP 5252901 A JP5252901 A JP 5252901A JP 25290193 A JP25290193 A JP 25290193A JP H06198358 A JPH06198358 A JP H06198358A
- Authority
- JP
- Japan
- Prior art keywords
- tubular
- insert
- fixing
- wall
- collar
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
- B21D39/044—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods perpendicular
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、管状の金属構造物に管
状の強化インサート（reinforcing insert）を固着する
方法に関する。FIELD OF THE INVENTION The present invention relates to a method for securing tubular reinforcing inserts to tubular metal structures.
【０００２】[0002]
【従来の技術】自動車の構造分野において、管状の構造
物とは、自動車のシャーシ、エンジンの支持フレーム又
は一般的に支持構造物をいう。従来、管状の構造物に直
角に強化インサートを固着する場合は、溶接によって行
われていた。In the field of automobile construction, tubular structures refer to automobile chassis, engine support frames or generally support structures. Conventionally, the case of fixing the reinforcing insert at a right angle to the tubular structure has been performed by welding.
【０００３】[0003]
【発明が解決しようとする課題】強化インサートは、機
械部品を固定するための手段として使うことができる。
例えば、エンジンを支えるフレームの場合、強化インサ
ートは、振動を減衰させる支持材のシート（seat）とし
て使え、引張応力又は軸方向の圧縮応力そして／又は切
断力を受けやすい。本発明の目的は、溶接をせずに強化
インサートを固着する異なった方法及びその装置を提供
することにある。Reinforcing inserts can be used as a means for securing mechanical parts.
For example, in the case of a frame that supports an engine, the reinforced insert can be used as a seat of support to dampen vibrations and is subject to tensile or axial compressive stress and / or cutting forces. It is an object of the present invention to provide a different method and device for securing a reinforced insert without welding.
【０００４】[0004]
【課題を解決するための手段】本発明の目的は、下記の
ステップを含む処理加工手段によって達成される。 １．管状の構造物の壁部の１部分を内側へ変形させて穴
を形成し、壁部の変形させた部分に輪状のカラーを形成
させる。 ２．管状のインサートの端部を上記カラーに挿入させ
る。 ３．管状の構造物に高圧の流体を導入して、上記カラー
を管状のインサートの端部に圧力をかけて押しつける。The objects of the invention are achieved by a processing means comprising the following steps: 1. A portion of the wall of the tubular structure is deformed inward to form a hole and a ring-shaped collar is formed in the deformed portion of the wall. 2. Insert the end of the tubular insert into the collar. 3. A high pressure fluid is introduced into the tubular structure and the collar is pressed against the end of the tubular insert.
【０００５】[0005]
【作用】本発明は、溶接によって通常に固着する方法と
比較して作業時間が大幅に削減される。更に、主構造物
に固着される強化インサートの数が増加しても、１つの
総形バイトで行う作業工程の作業時間は変わらない。そ
れに対して、インサートが溶接で固着されている場合、
溶接する部品の数に比例して作業時間が増加する。According to the present invention, the working time is greatly reduced as compared with the method of fixing by welding. Further, even if the number of reinforcing inserts fixed to the main structure is increased, the working time of the working process performed by one forming tool does not change. On the other hand, if the insert is welded,
Working time increases in proportion to the number of parts to be welded.
【０００６】本発明の方法で得られた接合箇所は、管状
の構造物の壁部に形成されたカラーにより得られた、よ
りすぐれた耐久性のある表面により、切断力に対してよ
り優れた耐久性を有している。接合部の寸法は、溶接に
よる従来の固着方法より、更により正確である。The joints obtained by the method of the present invention are more resistant to cutting forces due to the superior and durable surface obtained by the collar formed on the wall of the tubular structure. Has durability. The dimensions of the joint are even more accurate than in the conventional fixing method by welding.
【０００７】本発明は、更に上述の方法を行うための装
置に関する。本発明の更なる特徴と利点を、限定されな
い例をあげて次の詳細な説明で明らかにする。The invention further relates to a device for carrying out the method described above. Further features and advantages of the invention will be made apparent in the following detailed description, by way of non-limiting example.
【０００８】[0008]
【実施例】図１において、管状の構造物は符号１０で示
され、管状の強化インサート１２が固着されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1, a tubular structure is designated 10 and has a tubular reinforcing insert 12 secured thereto.
【０００９】一方のダイスに対して変位自在なもう１つ
のダイスからなる２つのダイスが、符号１４及び１６で
示されており、それらの間に管状の構造物１０を固定す
るようになっている。ダイス１４，１６はそれぞれのシ
ート１８，２０を有し、それらのシートを合わせて変形
空間を形成している。下側のダイス１６は、凹部２２を
有し、その凹部２２の底部から円柱状のポンチ２４が突
き出しており、通常、そのポンチ２４は、管状構造物１
０の軸に対して直角に延在している。ポンチ２４の直径
は、実質的には強化インサート１２の内径に等しく、そ
のため、強化インサート１２は、無理なくポンチ２４に
挿入することができる。図２に詳細に示されているよう
に、凹部２２の直径は、インサート１２の外径よりわず
かに大きい。このように、ポンチ２４に挿入されたイン
サート１２は、凹部２２の底部に接してポンチ２４に支
えられている。ポンチ２４は、先がとがった部分を有
し、この先がとがった部分は強化インサート１２の端部
を越えて突き出している。インサート１２は、環状の溝
２８を有する側に、円すい形の端部２６を有している。Two dies, one of which is the other that is displaceable with respect to the other, are designated by the numerals 14 and 16 and are intended to fix the tubular structure 10 between them. . The dice 14 and 16 have respective sheets 18 and 20, and these sheets are combined to form a deformation space. The lower die 16 has a concave portion 22, and a cylindrical punch 24 projects from the bottom of the concave portion 22. Usually, the punch 24 is the tubular structure 1
It extends at right angles to the 0 axis. The diameter of the punch 24 is substantially equal to the inner diameter of the reinforcing insert 12, so that the reinforcing insert 12 can be inserted into the punch 24 without difficulty. As shown in detail in FIG. 2, the diameter of the recess 22 is slightly larger than the outer diameter of the insert 12. In this way, the insert 12 inserted in the punch 24 contacts the bottom of the recess 22 and is supported by the punch 24. The punch 24 has a pointed portion, which protrudes beyond the end of the reinforcing insert 12. The insert 12 has a conical end 26 on the side having the annular groove 28.
【００１０】管状の構造物１０にインサート１２を挿入
させるために、次のようなことが行われる。In order to insert the insert 12 into the tubular structure 10, the following is performed.
【００１１】構造物１０は２つのダイス１４，１６の間
に配置され、管状の構造物１０に高圧流体を送る油圧サ
ーキット（図示せず）に接続されている。このような成
形技術は、それ自体は公知であり、一般に、ハイドロフ
ォーム法と呼ばれている。管状の構造物１０の中に加圧
した流体を送り込んだ結果、管状の構造物１０において
変形空間１８，２０内に配置された部分は、変形空間を
形成するシート１８，２０の壁面に接触するまで放射状
に膨張する。The structure 10 is disposed between the two dies 14 and 16 and is connected to a hydraulic circuit (not shown) for supplying a high-pressure fluid to the tubular structure 10. Such a molding technique is known per se and is generally called a hydroforming method. As a result of feeding the pressurized fluid into the tubular structure 10, the portions of the tubular structure 10 arranged in the deformation spaces 18, 20 contact the wall surfaces of the sheets 18, 20 forming the deformation space. Expands radially.
【００１２】管状の構造物１０の壁部が放射状に膨張す
るする間に、ポンチ２４は、管状構造物１０の壁部に穴
３０を開け（図３）、壁部３２を内側に変形させて輪状
のカラーを形成する。管状の構造物１０の壁が放射状に
膨張するに連れて、強化インサート１２は、輪状のカラ
ー３２に強制的に挿入される（図４）。カラー３２は、
構造物１０に送り込まれた高圧流体によって、インサー
ト１２の外壁に押しつけられて、インサート１２の溝２
８と端部２６に固着される。While the wall of the tubular structure 10 expands radially, the punch 24 punches a hole 30 in the wall of the tubular structure 10 (FIG. 3) and deforms the wall 32 inward. Form a ring-shaped collar. As the wall of the tubular structure 10 expands radially, the reinforcing insert 12 is forced into the annular collar 32 (FIG. 4). The color 32 is
The high pressure fluid sent to the structure 10 pushes against the outer wall of the insert 12 to cause the groove 2 of the insert 12 to move.
8 and the end portion 26 are fixed.
【００１３】その後に、構造物１０内の流体の圧力を下
げ、構造物１０から流体を回収する。図５及び図６は、
上述した方法でインサート１２を固着した後の構造物１
０を図示している。After that, the pressure of the fluid in the structure 10 is reduced to recover the fluid from the structure 10. 5 and 6 show
Structure 1 after fixing the insert 12 by the method described above
0 is illustrated.
【００１４】強化インサート１２を強固に固定した位置
に対応する構造物１０の部分を放射状に膨張させること
は随意であり、構造物１０を放射状に膨張させずに同様
のことができることは言うまでもない。It is of course possible to radially expand the part of the structure 10 corresponding to the position where the reinforcing insert 12 is firmly fixed, and it goes without saying that the same can be done without expanding the structure 10 radially.
【００１５】[0015]
【発明の効果】本発明は、管状の構造物１０の壁部の１
部分をポンチ２４の挿入力によって、内側へ変形させて
穴３０を形成して、壁部の変形させた部分に輪状のカラ
ー３２を形成させ、管状のインサート１２の端部２６を
上記カラー３２に挿入させ、管状の構造物１０に高圧の
流体を導入して、上記カラー３２を管状のインサート１
２の端部２６に圧力をかけて押しつける工程からなる方
法によって、強化インサート１２を管状の構造物１０に
固着することができ、かつ、その方法を実施する装置と
して、管状の構造物１０を挟んで締め付けて固定するた
めの一対のダイス１４，１６と、該ダイス１４，１６の
一方に固着されたポンチ２４からなる装置を提供して、
その装置を持ってして、強化インサート１２を簡単に管
状の金属構造物１０に固着できるものである。INDUSTRIAL APPLICABILITY The present invention relates to the wall portion 1 of the tubular structure 10.
The portion is deformed inward by the insertion force of the punch 24 to form the hole 30 to form a ring-shaped collar 32 in the deformed portion of the wall portion, and the end portion 26 of the tubular insert 12 is fixed to the collar 32. The collar 32 is inserted and the high-pressure fluid is introduced into the tubular structure 10 to insert the collar 32 into the tubular insert 1.
The reinforcing insert 12 can be fixed to the tubular structure 10 by a method including a step of pressing the end portion 26 of the second member 26 with pressure, and the tubular structure 10 is sandwiched as a device for performing the method. An apparatus comprising a pair of dies 14 and 16 for tightening and fixing with a punch and a punch 24 fixed to one of the dies 14 and 16,
With the device, the reinforcing insert 12 can be easily fixed to the tubular metal structure 10.
【図１】 本発明の方法を実施する装置の略断面を示す
図。1 shows a schematic cross section of an apparatus for carrying out the method of the invention.
【図２】 図１の矢印IIによって示された部分をより詳
細に示した部分拡大図。FIG. 2 is a partially enlarged view showing in more detail a portion indicated by an arrow II in FIG.
【図３】 本発明における方法の一工程を示した略断面
図。FIG. 3 is a schematic cross-sectional view showing one step of the method of the present invention.
【図４】 本発明における方法の他の工程を示した略断
面図。FIG. 4 is a schematic cross-sectional view showing another step of the method of the present invention.
【図５】 本発明における方法の他の工程を示した略断
面図。FIG. 5 is a schematic cross-sectional view showing another step of the method of the present invention.
【図６】 本発明の方法で作られた部品を示した図。FIG. 6 shows a part made by the method of the present invention.
１０ 管状の構造物 １２ 管状の強化インサート １４，１６ ダイス １８，２０ 変形空間 ２４ ポンチ ２６ 端部 ２８ 溝 ３０ 穴 ３２ カラー 10 Tubular Structure 12 Tubular Reinforcing Insert 14,16 Dies 18,20 Deformation Space 24 Punch 26 End 28 Groove 30 Hole 32 Color
Claims (8)
内側へ変形させて穴（３０）を形成して、壁部の変形さ
せた部分に輪状のカラー（３２）を形成させ、 管状のインサート（１２）の端部（２６）を上記カラー
（３２）に挿入させ、 管状の構造物（１０）に高圧の流体を導入して、上記カ
ラー（３２）を管状のインサート（１２）の端部（２
６）に圧力をかけて押しつける工程からなることを特徴
とする管状の金属構造物（１０）に管状の強化インサー
ト（１２）を固着する方法。1. A part of the wall of the tubular structure (10) is deformed inward to form a hole (30), and a ring-shaped collar (32) is formed in the deformed part of the wall. The end portion (26) of the tubular insert (12) is inserted into the collar (32), and a high-pressure fluid is introduced into the tubular structure (10) to attach the collar (32) to the tubular insert (12). ) End (2
A method for fixing a tubular reinforcing insert (12) to a tubular metal structure (10), which comprises the step of applying pressure to 6).
（３０）及び上記カラー（３２）は、ポンチ（２４）の
挿入力によって管状の構造物（１０）の壁部に形成され
ることを特徴とする管状の金属構造物（１０）に管状の
強化インサート（１２）を固着する方法。2. The method according to claim 1, wherein the hole (30) and the collar (32) are formed in the wall of the tubular structure (10) by the insertion force of the punch (24). A method of fixing a tubular reinforcing insert (12) to a tubular metal structure (10), which comprises:
状の構造物（１０）に高圧の流体を導入し、管状の構造
物（１０）の壁部を放射状に膨張させて管状の構造物
（１０）の壁部にポンチ（２４）を挿入するためにイン
サート（１２）を強固に固定する管状の構造物（１０）
の部分を放射状に膨張させる工程を行うことを特徴とす
る管状の金属構造物（１０）に管状の強化インサート
（１２）を固着する方法。3. The method according to claim 2, further comprising introducing a high-pressure fluid into the tubular structure (10) to radially expand the wall of the tubular structure (10). Tubular structure (10) for firmly fixing the insert (12) for inserting the punch (24) into the wall of the structure (10).
A method for fixing a tubular reinforcing insert (12) to a tubular metal structure (10), characterized by performing the step of radially expanding the portion of the.
の方法にして、上記管状のインサート（１２）は、管状
の構造物（１０）の壁部にポンチ（２４）を挿入する工
程の前にポンチ（２４）に配置され、ポンチ（２４）
は、インサート（１２）の端部より突き出た、先がとが
った端部を有することを特徴とする管状の金属構造物
（１０）に管状の強化インサート（１２）を固着する方
法。4. The method according to claim 2 or 3, wherein the tubular insert (12) inserts a punch (24) into the wall of the tubular structure (10). Placed on the punch (24) in front of the punch (24)
Is a method of fastening a tubular reinforcing insert (12) to a tubular metal structure (10), characterized in that it has a pointed end protruding from the end of the insert (12).
ト（１２）の上記端部（２６）は、円すい形をなしてい
ることを特徴とする管状の金属構造物（１０）に管状の
強化インサート（１２）を固着する方法。5. The method according to claim 1, wherein the end (26) of the insert (12) is conical in shape in a tubular metal structure (10). A method of fixing the reinforcing insert (12).
のインサート（１２）は、インサート（１２）の端部
（２６）に圧力がかかっている間にカラー（３２）が覆
いかぶさる輪状の溝（２８）を有することを特徴とする
管状の金属構造物（１０）に管状の強化インサート（１
２）を固着する方法。6. The method according to claim 1, wherein the tubular insert (12) has a ring shape over which the collar (32) covers while the end (26) of the insert (12) is under pressure. Tubular metal structure (10) characterized by having grooves (28) of
Method of fixing 2).
ポンチ（２４）の挿入力によって、内側へ変形させて穴
（３０）を形成して、壁部の変形させた部分に輪状のカ
ラー（３２）を形成させ、 管状のインサート（１２）の端部（２６）を上記カラー
（３２）に挿入させ、 管状の構造物（１０）に高圧の流体を導入して、上記カ
ラー（３２）を管状のインサート（１２）の端部（２
６）に圧力をかけて押しつける工程からなる管状の金属
構造物（１０）に管状の強化インサート（１２）を固着
する装置にして、 管状の構造物（１０）を挟んで締め付けて固定するため
の一対のダイス（１４，１６）と、 該ダイス（１４，１６）の一方に固着されたポンチ（２
４）からなることを特徴とする管状の金属構造物（１
０）に管状の強化インサート（１２）を固着する装置。7. A portion of the wall portion of the tubular structure (10) is deformed inward by an inserting force of a punch (24) to form a hole (30), and the hole (30) is formed in the deformed portion of the wall portion. A ring-shaped collar (32) is formed, the end (26) of the tubular insert (12) is inserted into the collar (32), and a high-pressure fluid is introduced into the tubular structure (10) to form the collar. (32) to the end (2) of the tubular insert (12)
6) A device for fixing a tubular reinforcing insert (12) to a tubular metal structure (10), which comprises a step of applying pressure to the tubular structure (10), to clamp and fix the tubular structure (10). A pair of dies (14, 16) and a punch (2) fixed to one of the dies (14, 16).
4) A tubular metal structure characterized by comprising (1)
Device for fixing tubular reinforcing insert (12) to 0).
ス（１４，１６）は、変形空間部（１８，２０）を示し
ており、管状の構造物（１０）に高圧流体を導入し、変
形空間部（１８，２０）内で管状の構造物（１０）を放
射状に膨張させると共に、管状の構造物（１０）の壁部
にポンチ（２４）を貫通させる前は、上記変形空間部
（１８，２０）は、対応する管状の構造物（１０）の部
分よりも大きいことを特徴とする管状の金属構造物（１
０）に管状の強化インサート（１２）を固着する装置。8. The apparatus according to claim 7, wherein the dies (14, 16) show a deformation space (18, 20), and a high-pressure fluid is introduced into the tubular structure (10). Before the punch (24) penetrates the wall of the tubular structure (10) while radially expanding the tubular structure (10) in the deformation space (18, 20), the above-mentioned deformation space The tubular metal structure (1) is characterized in that (18, 20) is larger than a portion of the corresponding tubular structure (10).
Device for fixing tubular reinforcing insert (12) to 0).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITTO920851A IT1256977B (en) | 1992-10-22 | 1992-10-22 | PROCEDURE FOR FIXING A TUBULAR REINFORCEMENT INSERT TO A METALLIC TUBULAR STRUCTURE AND EQUIPMENT FOR CARRYING OUT THIS PROCEDURE. |
| IT92A000851 | 1992-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06198358A true JPH06198358A (en) | 1994-07-19 |
Family
ID=11410798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5252901A Pending JPH06198358A (en) | 1992-10-22 | 1993-10-08 | Method and device for fixing tubular reinforcing insert into tubular metal structure |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0593950B1 (en) |
| JP (1) | JPH06198358A (en) |
| DE (1) | DE69308101T2 (en) |
| IT (1) | IT1256977B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004501767A (en) * | 2000-06-29 | 2004-01-22 | サーブ オートモービル アクティエボラーグ | Method of manufacturing a structural element with an enhanced bend and structural element |
| JP2008110349A (en) * | 2006-10-27 | 2008-05-15 | Nippon Steel Corp | Drilling method and drilling device using hydrofoam, hydrofoam processed parts and structure |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19530055B4 (en) * | 1995-08-16 | 2004-08-26 | Schuler Hydroforming Gmbh & Co. Kg | Process for producing double-walled openings in components using the hydroforming process |
| DE19714902C2 (en) * | 1997-04-10 | 1999-05-12 | Meleghy Hydroforming Gmbh & Co | Method and device for introducing connecting elements into a metal sheet |
| US6134767A (en) * | 1997-04-10 | 2000-10-24 | Meleghy Hydroforming Gmbh & Co. Kg | Method for embedding connection elements in a wall |
| US6574849B1 (en) | 1998-08-17 | 2003-06-10 | Siempelkamp Pressen Systeme Gmbh & Co. | Method for deforming through high inner pressure at least two hollow bodies having each at least one opening, especially metal tubes or metal hollow profiles |
| DE10230284B4 (en) * | 2002-07-05 | 2008-10-16 | Daimler Ag | Method and device for attaching components to circumferentially closed hollow sections |
| DE10346906B3 (en) | 2003-10-09 | 2005-05-19 | Benteler Automobiltechnik Gmbh | Joining two components during the thermoforming process |
| DE102007007932B3 (en) * | 2007-02-17 | 2008-12-18 | Daimler Ag | Connecting method for connecting connection component with inner high pressure-molded part, involves punching retainer, forming additional receiving opening and plugging connection component |
| DE102010041971A1 (en) * | 2010-10-05 | 2012-04-05 | Arnold & Shinjo Gmbh & Co. Kg | Method and device for attaching punching elements to pipes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3350905A (en) * | 1963-12-21 | 1967-11-07 | Agency Ind Science Techn | Liquid pressure bulge forming apparatus |
| FR1532737A (en) * | 1966-07-12 | 1968-07-12 | Western Electric Co | Manufacture of a tubular article with parts of different cross sections |
| GB8710650D0 (en) * | 1987-05-06 | 1987-06-10 | Flamefast Technology Ltd | Making angled joint |
-
1992
- 1992-10-22 IT ITTO920851A patent/IT1256977B/en active IP Right Grant
-
1993
- 1993-09-29 EP EP93115680A patent/EP0593950B1/en not_active Expired - Lifetime
- 1993-09-29 DE DE69308101T patent/DE69308101T2/en not_active Expired - Fee Related
- 1993-10-08 JP JP5252901A patent/JPH06198358A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004501767A (en) * | 2000-06-29 | 2004-01-22 | サーブ オートモービル アクティエボラーグ | Method of manufacturing a structural element with an enhanced bend and structural element |
| JP2008110349A (en) * | 2006-10-27 | 2008-05-15 | Nippon Steel Corp | Drilling method and drilling device using hydrofoam, hydrofoam processed parts and structure |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1256977B (en) | 1995-12-27 |
| ITTO920851A1 (en) | 1994-04-22 |
| DE69308101T2 (en) | 1997-05-28 |
| DE69308101D1 (en) | 1997-03-27 |
| ITTO920851A0 (en) | 1992-10-22 |
| EP0593950A1 (en) | 1994-04-27 |
| EP0593950B1 (en) | 1997-02-12 |
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