WO2000061309A1 - Verfahren und vorrichtung zur herstellung eines halbzeugs - Google Patents
Verfahren und vorrichtung zur herstellung eines halbzeugs Download PDFInfo
- Publication number
- WO2000061309A1 WO2000061309A1 PCT/EP2000/002957 EP0002957W WO0061309A1 WO 2000061309 A1 WO2000061309 A1 WO 2000061309A1 EP 0002957 W EP0002957 W EP 0002957W WO 0061309 A1 WO0061309 A1 WO 0061309A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- profile blank
- profile
- upsetting
- blank
- producing
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
Definitions
- the invention relates to a method for producing a semifinished product by upsetting a profile blank from an extruded profile and a device for carrying out this method.
- the semi-finished products made from a profile blank can later be further processed by forging, pressing, rolling or also machining.
- drop forgings are made from profile sections by forming in the die.
- the metal is reshaped by impact or pressure in a die that surrounds the material on all sides except for a ridge joint until the mold cavity is completely filled.
- the invention is based on the object of proposing a method and a device for producing a semifinished product, with which upsetting in several planes is made possible and, in addition, higher upsetting ratios can be achieved.
- the invention is based on the idea that compression in several planes is possible by using a profile blank, the geometry of which, in cooperation with the die, causes the profile blank to be fixed. Care must therefore be taken to fix the profile blank in the tool so that it causes a kind of clamping of the blank at one or more points when the die is closed before the upsetting process.
- the profile blank has at least one cross-sectional constriction or widening, seen in cross section, which in cooperation with a correspondingly shaped bulge or depression in the shaping engraving of the die, the profile blank is fixed.
- the profile blank consists of a wrought aluminum alloy. Wrought aluminum alloys can be rolled, drawn, pressed, forged and welded.
- important groups of wrought aluminum alloys such as Al-Cu-Mg alloy have particularly high strength, good machinability, but low corrosion resistance. Due to the high corrosion resistance, Al-Mg-Si alloys are preferred in vehicle construction.
- the profile blank has the cross section of the number eight.
- This geometry is of course only one of many possibilities for designing the cross-section of the extruded profile, but this geometry in the form of the number eight has the advantage that the extruded profiles can be obtained inexpensively and, moreover, these profiles have advantages in terms of demoldability.
- the profile blank is subjected to a heat treatment, preferably at temperatures between 400 ° C. and 500 ° C., before the upsetting process. This allows the degree of deformation to be increased.
- FIG. 1 shows a schematic sectional view of a die with a profile blank, which is positively inserted therein and is to be compressed, according to a first embodiment of the invention
- FIG. 2 shows a view corresponding to the representation in FIG. 1, which shows an alternative embodiment of the shaping of a profile blank and of a shaping engraving;
- FIG. 3 shows a view corresponding to the representation in FIG. 1, which shows a further alternative embodiment of the shaping of a profile blank and of a shaping engraving;
- FIG. 4 shows a view corresponding to the representation in FIG. 1, which shows a further alternative embodiment of the shaping of a profile blank and of a shaping engraving;
- FIG. 1 shows a schematic view of a device for producing a semi-finished product from a profile blank, the view showing a section through a die 10, which consists of a lower tool 12 and an upper tool 14.
- the basic geometry and function of the lower tool and upper tool correspond to the dies known in the prior art.
- a profile blank 16 that has not yet been compressed is inserted into the die.
- the profile blank preferably consists of a wrought aluminum alloy, such as an Al-Cu-Mg alloy, Al-Mg-Si alloy, Al-Mg alloy, Al-Mg-Mn alloy or else Al-Mn alloy. Wrought aluminum alloys can be rolled, drawn, pressed, forged and welded and, depending on the alloy selected, have a high level Strength, good machinability, but low corrosion resistance. This material is therefore very suitable for the production of a semi-finished product, which is later to be further processed by forging, pressing, rolling or by machining.
- compression should take place in two directions A and B in order to fill the expansion spaces 18a and 18b with the formed profile blank during compression.
- the upsetting process itself is carried out by pressing sliders against the profile blank, the upsetting movement carried out on both sides by the sliders taking place in opposite directions and perpendicular to the plane of the drawing in FIGS. 1 to 4.
- the profile blank is inserted between the lower tool 12 and upper tool 14 in such a way that after the die 10 is closed, a positive connection is created between the profile blank 16 and the geometry of the engraving of the die.
- the profile blank is provided with a cross section that corresponds to the cross section of the number eight, i.e. consists of two circles arranged in an overlapping manner.
- the profile blank 16 has cross-sectional reductions 20, each of which has a groove along the profile blank, i.e. perpendicular to the plane of the drawing in FIGS. 1 to 3.
- the lower tool 12 and the upper tool 14 are each provided with a correspondingly shaped bulge 22, which is designed in such a way that it comes into positive contact with the reduction in cross section 20 of the profile blank.
- a reduction in the cross section of the profile blank which interacts with a correspondingly shaped bulge in the tools of the die.
- the profile blank can also have one or more cross-sectional extensions which interact with one or more corresponding recesses in the shaping engraving.
- each of the examples shown shows a very large form-fit area between the profile blank and the tools of the die.
- the geometric relationship between the profile blank and the tools of the die only has to be designed in such a way that a secure clawing or hooking of the profile blank in the tool and thus fixing the position of the profile blank is achieved. Therefore, if the profile blank in the die with a small play, i.e. 1 with little mobility in the arrow directions A and B, this is harmless, since the material flow during the upsetting does not have to take place in a completely symmetrical manner.
- This can also be seen from the illustration in FIG. 1, in which a greater material flow takes place in the expansion space 18a in the direction of arrow A than in the expansion space 18b in the direction of arrow B.
- an extruded profile with the geometry shown in FIG. 1 is less expensive than an extruded profile with a rectangular cross section, which is preferably used in technology.
- very high compression ratios of up to 1: 5 can be achieved, so that a large overall width of the compression blank can be achieved.
- the geometry of the profile blank shown in FIG. 1 also has the advantage that there is good demoldability.
- a profile with a rectangular cross-section, which has a very slight draft of maximum 1 °, cannot be removed from the mold without the application of force.
- the profile shown in FIG. 1, on the other hand, does not require any bevel, since this consists only of radii and shrinking of the upset blank on the lower tool of the upset engraving is almost impossible.
- FIG. 2 shows an alternative embodiment which differs from the embodiment shown in FIG. 1 only with regard to the selected geometries of the profile blank 16b and the geometry of the expansion spaces.
- the example shown in FIG. 2 is rotationally symmetrical, so that there are no mass displacements via the axis of symmetry 24 during the upsetting process.
- FIG. 2 there is a positive contact between the bulges 22 in the upper tool 14 and lower tool 12 and the profile blank.
- the difference from the exemplary embodiment shown in FIG. 1 is that, in addition to the compression directions A and B, further direction components C and D can be implemented which are perpendicular to the compression directions A and B. Thus, compression takes place in four directions.
- FIG. 3 A further alternative is shown in FIG. 3, in which there is a positive contact between the profile blank 16 and the die tools not only in the area of the cross-sectional reduction 20 and the correspondingly shaped bulge 22 in the upper tool 14 as well as the lower tool 12, but also over this area out. In the example shown in FIG.
- a material flow occurs in several directions during upsetting, this taking place in the expansion space 18a in a unidirectional manner (direction B) and in the expansion space 18b in three directions.
- direction B unidirectional manner
- the essential point of view is that the shape of the die 10 in cooperation with the profile blank 16 fixes the position of the profile blank before the actual upsetting process, and thus upsetting can take place simultaneously in several directions.
- FIG. 4 shows an alternative embodiment in which four different expansion spaces 18a, 18b, 18c and 18d are provided.
- the profile blank is formed from an extruded profile which, in the present example, has the geometry of three circular cylinders, the longitudinal axes of which lie on a straight line at the same distance from one another and which are arranged in an overlapping manner with one another.
- the resulting cross section which can be seen in FIG. 4, has four
- Cross-sectional reductions 20a, 20b which come into positive contact with bulges 22a, 22b of the lower tool 12 as well as the upper tool 14 of the die.
- a material flow takes place in four completely different directions, depending on the geometry of the desired, finished workpiece a pre-metering of the material adapted in the best possible way can take place.
- the method according to the invention and the device used are characterized in that very high compression ratios of at least 1: 4 can be achieved without problems and without the use of side shifters. With special geometry variants, as shown for example in FIG. 4, compression ratios of up to 1: 5 are possible.
- the entire upsetting process can be accelerated if, after the die has been closed, there is already a positive connection between the profile blank to be machined and the die.
- the profile blank is filled into the upset engraving, a centering of the profile blank already occurs within the upset engraving, so that no upstream step is required for precise positioning of the profile blank within the engraving.
- the actual upsetting process can take place immediately, so that, in addition to the advantages mentioned above with regard to optimized metering of primary materials, a particularly rapid processing sequence can also be realized.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Extrusion Of Metal (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00926793A EP1169147B1 (de) | 1999-04-13 | 2000-04-03 | Verfahren und vorrichtung zur herstellung eines halbzeugs |
AT00926793T ATE233135T1 (de) | 1999-04-13 | 2000-04-03 | Verfahren und vorrichtung zur herstellung eines halbzeugs |
AU45421/00A AU4542100A (en) | 1999-04-13 | 2000-04-03 | Method and device for producing a semi-finished product |
DE50001326T DE50001326D1 (de) | 1999-04-13 | 2000-04-03 | Verfahren und vorrichtung zur herstellung eines halbzeugs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19916590A DE19916590A1 (de) | 1999-04-13 | 1999-04-13 | Verfahren und Vorrichtung zur Herstellung eines Halbzeugs |
DE19916590.4 | 1999-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000061309A1 true WO2000061309A1 (de) | 2000-10-19 |
Family
ID=7904362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/002957 WO2000061309A1 (de) | 1999-04-13 | 2000-04-03 | Verfahren und vorrichtung zur herstellung eines halbzeugs |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1169147B1 (de) |
AT (1) | ATE233135T1 (de) |
AU (1) | AU4542100A (de) |
DE (2) | DE19916590A1 (de) |
ES (1) | ES2188536T3 (de) |
WO (1) | WO2000061309A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011105244A1 (de) * | 2011-02-04 | 2012-08-09 | Sms Meer Gmbh | Verwendung eines Warmstauchverfahrens, Verwendung eines Umformwerkzeuges, Verfahren zum Erzeugen einer Schmiedevorform und Umformvorrichtung oder Warmstauchvorrichtung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4208019A1 (de) * | 1991-06-10 | 1992-12-24 | Banning Gmbh J | Verfahren und vorrichtung zur herstellung rotationssymmetrischer teile aus metall |
JPH0857568A (ja) * | 1994-08-22 | 1996-03-05 | Toyota Motor Corp | 荒地成形型 |
-
1999
- 1999-04-13 DE DE19916590A patent/DE19916590A1/de not_active Withdrawn
-
2000
- 2000-04-03 AT AT00926793T patent/ATE233135T1/de not_active IP Right Cessation
- 2000-04-03 AU AU45421/00A patent/AU4542100A/en not_active Abandoned
- 2000-04-03 WO PCT/EP2000/002957 patent/WO2000061309A1/de active IP Right Grant
- 2000-04-03 EP EP00926793A patent/EP1169147B1/de not_active Expired - Lifetime
- 2000-04-03 ES ES00926793T patent/ES2188536T3/es not_active Expired - Lifetime
- 2000-04-03 DE DE50001326T patent/DE50001326D1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4208019A1 (de) * | 1991-06-10 | 1992-12-24 | Banning Gmbh J | Verfahren und vorrichtung zur herstellung rotationssymmetrischer teile aus metall |
JPH0857568A (ja) * | 1994-08-22 | 1996-03-05 | Toyota Motor Corp | 荒地成形型 |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch Week 199619, Derwent World Patents Index; Class M21, AN 1996-183047, XP002901148 * |
Also Published As
Publication number | Publication date |
---|---|
AU4542100A (en) | 2000-11-14 |
EP1169147B1 (de) | 2003-02-26 |
EP1169147A1 (de) | 2002-01-09 |
ATE233135T1 (de) | 2003-03-15 |
ES2188536T3 (es) | 2003-07-01 |
DE50001326D1 (de) | 2003-04-03 |
DE19916590A1 (de) | 2000-10-26 |
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