EP0232257A1 - Verfahren zur herstellung von flanschen oder bunden an hohlkörpern durch querfliesspressen. - Google Patents
Verfahren zur herstellung von flanschen oder bunden an hohlkörpern durch querfliesspressen.Info
- Publication number
- EP0232257A1 EP0232257A1 EP85904093A EP85904093A EP0232257A1 EP 0232257 A1 EP0232257 A1 EP 0232257A1 EP 85904093 A EP85904093 A EP 85904093A EP 85904093 A EP85904093 A EP 85904093A EP 0232257 A1 EP0232257 A1 EP 0232257A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flanges
- support
- extrusion
- production
- plastic
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
- B21K23/04—Making other articles flanged articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
Definitions
- the invention relates to a method for producing flanges or bundles on hollow bodies which are supported on the inside during cross-extrusion.
- Flanges formed on hollow bodies have a large number of possible uses, for example as flanges on pipes, for hubs and the like.
- Cross extrusion as a forming process is defined, for example, according to DIN 8583.
- Methods and devices for the production of tenons by the transverse extrusion method are known, as is the transverse extrusion of a bundle on solid bodies. It is also known to press gearwheels, using radially movable tool elements from the outside inwards. In cross extrusion, the material flows in the radial direction partly from the outside to the center of the workpiece and partly from the center of the workpiece to the outside.
- a hollow body with a collar or flange can also be produced by perforating the bottom of the bowl.
- the length of the hollow body that can be achieved in this way depends, however, on the length-to-diameter ratio (up to approximately 4) depending on the process, that is, until now only hollow parts with a maximum length caused by the process could be produced in this way.
- the invention has for its object a method for producing. Indicate hollow parts with flange or collar, which permits the production of flanges or collars without crease in the flange or collar region at low manufacturing costs, with no process-related restrictions to the length of the hollow parts flanged occur.
- the object is achieved in the generic method in that the material in the bore is supported by a plastic medium.
- the transverse flowing material can be deflected to the outside without forming an internal fold, and the flange can be produced in a single process step.
- a variable controlled material flow is achieved through the plastic support.
- Conventionally manufactured parts with pleats which were produced by inexpensive cross-extrusion processes, could only be used for subordinate purposes, since the fold is practically not detectable in the strength calculation and at the same time represents a starting point for cracks under load and the breakage of the component.
- a plastically and / or elastically deformable mass for example rubber, plastic, soft metal or the like, is used for support.
- a gas - preferably under high pressure - is used for support.
- water is used as a support which shows an elastic behavior under pressures in the range from up to 10,000 bar.
- Both rotationally symmetrical and non-rotationally symmetrical flanges or bundles can be produced by the method according to the invention.
- the support can also be partially achieved by a mandrel, while the plastic material is used to compensate and to reverse the flow only in the flange area.
- the forming can be carried out both at room temperature and at higher temperatures.
- the method can be applied to all materials that can be formed by transverse extrusion and can also form a component of other known forming methods, for example together with the drawing-in method, expanding and
- the method according to the invention makes it possible for the first time to produce flanges or bundles on hollow bodies by means of transverse extrusion without costly process steps without wrinkling in the interior of the hollow body.
- Fig. 1 shows a conventional tube with a molded collar 2 with a fold 3. It can be produced by the method according to the invention without a fold in the collar area (Fig. 2).
- water is pumped under high pressure, i.e. in the range of up to 10,000 bar for support in the cavity during the cross extrusion of a pipe.
- high pressure i.e. in the range of up to 10,000 bar for support in the cavity during the cross extrusion of a pipe.
- the forming and liquid pressure is reduced and the finished workpiece can be
- the forming can also be carried out simultaneously with an expansion of the tube itself during the formation of a bundle, so the original tube diameter of the hollow body 5 in a forming zone 6 is parallel to the forming to produce the bundle 2 in FIG. 2 the final diameter of the pipe part 1 has been expanded.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE1985/000276 WO1987001062A1 (en) | 1985-08-14 | 1985-08-14 | Process for the production of flanges or collars on hollow parts by lateral extrusion |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0232257A1 true EP0232257A1 (de) | 1987-08-19 |
EP0232257B1 EP0232257B1 (de) | 1991-05-29 |
Family
ID=6776124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85904093A Expired - Lifetime EP0232257B1 (de) | 1985-08-14 | 1985-08-14 | Verfahren zur herstellung von flanschen oder bunden an hohlkörpern durch querfliesspressen |
Country Status (4)
Country | Link |
---|---|
US (1) | US4782679A (de) |
EP (1) | EP0232257B1 (de) |
DE (1) | DE3583041D1 (de) |
WO (1) | WO1987001062A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5724850A (en) * | 1993-03-26 | 1998-03-10 | Honda Giken Kogyo Kabushiki Kaisha | Rear fork for a motorcycle |
CN1060415C (zh) * | 1997-04-25 | 2001-01-10 | 张应宪 | 钢法兰毛坯制造新工艺 |
US6098437A (en) * | 1998-03-20 | 2000-08-08 | The Budd Company | Hydroformed control arm |
US6209372B1 (en) | 1999-09-20 | 2001-04-03 | The Budd Company | Internal hydroformed reinforcements |
CA2326746A1 (en) | 1999-11-24 | 2001-05-24 | Wolfgang K. Rohn | Modular roof and headliner assembly |
FR2807684B1 (fr) * | 2000-04-17 | 2002-07-19 | Michel Beffrieu | Dispositif modulaire porte-outils |
EP2030701A1 (de) * | 2007-08-25 | 2009-03-04 | IFUTEC Ingenieurbüro für Umformtechnik GmbH | Werkzeug und Verfahren zum Fertigen eines Hohlteils |
DE102010009345B4 (de) | 2010-02-25 | 2011-09-22 | Schuler Cartec Gmbh & Co. Kg | Verfahren und Werkzeug zur Herstellung eines Bauteils sowie ein durch Umformung hergestelltes Bauteil |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US203842A (en) * | 1878-05-21 | Improvement in the methods of bending plumbers traps | ||
US2198643A (en) * | 1935-09-28 | 1940-04-30 | W S A Inc | Method of and apparatus for making hollow articles |
US2138199A (en) * | 1935-09-28 | 1938-11-29 | Frans B Wendel | Method of making metal fittings and the like |
US2200664A (en) * | 1937-10-22 | 1940-05-14 | Northern Indiana Brass Co | Method of forming hollow metal members |
US2168641A (en) * | 1938-03-07 | 1939-08-08 | Northern Indiana Brass Co | Die mechanism |
US2328742A (en) * | 1941-02-17 | 1943-09-07 | Thompson Prod Inc | Method of making flanged tubing |
US2960763A (en) * | 1955-10-11 | 1960-11-22 | Reymond M Reichl | Method of forging with thin webs |
US3286498A (en) * | 1964-02-03 | 1966-11-22 | Gen Electric | Compressive forming |
NL6607578A (de) * | 1965-06-04 | 1966-12-05 | ||
US3442106A (en) * | 1966-09-12 | 1969-05-06 | Mueller Brass Co | Method and apparatus for making wrought metal branch fittings |
-
1985
- 1985-08-14 EP EP85904093A patent/EP0232257B1/de not_active Expired - Lifetime
- 1985-08-14 DE DE8585904093T patent/DE3583041D1/de not_active Expired - Lifetime
- 1985-08-14 WO PCT/DE1985/000276 patent/WO1987001062A1/de active IP Right Grant
- 1985-08-14 US US07/037,256 patent/US4782679A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8701062A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3583041D1 (de) | 1991-07-04 |
EP0232257B1 (de) | 1991-05-29 |
US4782679A (en) | 1988-11-08 |
WO1987001062A1 (en) | 1987-02-26 |
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