EP3525952A1 - Werkzeug zum innenhochdruckumformen sowie verfahren zum umformen eines werkstücks durch innenhochdruckumformen - Google Patents
Werkzeug zum innenhochdruckumformen sowie verfahren zum umformen eines werkstücks durch innenhochdruckumformenInfo
- Publication number
- EP3525952A1 EP3525952A1 EP17772054.7A EP17772054A EP3525952A1 EP 3525952 A1 EP3525952 A1 EP 3525952A1 EP 17772054 A EP17772054 A EP 17772054A EP 3525952 A1 EP3525952 A1 EP 3525952A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- workpiece
- segments
- closed state
- movable
- 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
- 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
- B21D26/047—Mould construction
-
- 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
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
Definitions
- IHU hydroforming
- a metallic output tube part by applying a high internal pressure to a tubular member or hydroformed component.
- the starting tube part is inserted into the cavity of a shaping hydroforming tool and, with the aid of a fluid introduced into the interior, for example a water-oil emulsion, is widened essentially transversely to the longitudinal axis, the tube jacket of the outlet tube part being pressed against the cavity wall and correspondingly is formed.
- the document DE 197 08 905 A1 shows, in particular in connection with FIG. 2, a device for hydroforming of a bodywork support comprising two tool halves between which a parting line runs.
- a disadvantage of the known methods or devices for hydroforming is that the components to be manufactured must be designed so that they have no undercut in the closing direction of the press to close the mold halves.
- the coordination of the running between the two mold halves dividing line is very complex. For example, a misalignment can lead to loss of quality or even failure of the component.
- first of all preforming in one or more process steps is required, wherein a preformed starting tube part for the subsequent hydroforming in the hydroforming die is produced from the starting tube part. If, for example, the component cross section tapers in relation to the blank, preforming, for example by means of dip engraving, is absolutely necessary.
- Document DE 100 14 619 A1 in conjunction with FIG. 26, shows a hydroforming device which has four spaced-apart, fixed, immovable forms with concave surfaces and four movable plunger molds each arranged between the fixed forms.
- a disadvantage of this device for example, that due to the solid shapes, the workpieces to be formed must be inserted axially into the device. Due to the solid shapes coming into contact with the workpiece during forming, fixed component radii are predetermined. Furthermore, preforming can not always be avoided. Even the tuning of the dividing lines between the fixed shapes and the movable punch shapes is very complex.
- a tool described here for hydroforming a workpiece has, according to at least one embodiment, at least three movable tool segments.
- the workpiece may in particular be a hollow body, for example a metallic, tubular hollow body.
- the molded component may e.g. be used as a structural component for a motor vehicle.
- the movable tool segments define a shaping cavity for receiving and forming the workpiece.
- the tool may have one or more open states and a closed state. When closed, the tool preferably forms, at least in sections, a completely closed cavity.
- the shaping cavity is at least partially completely formed by the movable tool segments.
- the closed cavity is at least partially formed solely by the at least three movable tool segments.
- the at least three movable tool segments can at least partially form the shaping cavity completely such that a closed circumferential cavity contour is formed by the movable tool segments in an imaginary cross-sectional plane.
- the movable tool segments in the closed state of the tool not only in sections, but over the entire cavity across the cavity completely form, so that over the entire cavity away in any imaginary cross-sectional plane a continuous circumferential Kavmaschinesumrissline is formed by the movable tool segments.
- each of the movable tool segments in the closed state of the tool, is in direct contact with two other movable tool segments.
- the movable tool segments can in the closed state of the tool, in particular in areas which are directly adjacent to the surface of the cavity, in contact with other movable tool segments, so that in the closed state alone by the movable tool segments a closed cavity is formed.
- the tool is designed such that when forming a workpiece, the separating lines arranged in the closed state of the tool between two movable tool segments have no direct contact with the workpiece.
- the parting lines arranged between two directly adjacent tool segments is in contact with the workpiece. Consequently, it may be a tool structure without a parting line and component corner radii. Because the workpiece has no contact with a parting line, advantageously a better quality of the component to be manufactured can be achieved.
- the tool has four movable tool segments, which at least partially completely form the shaping cavity in the closed state of the tool.
- the four movable tool segments in the closed state of the tool over the entire cavity away from this completely, so that in an imaginary cross-sectional plane, a closed circumferential Kavmaschinesumrissline is formed by the four movable tool segments.
- the tool described here can advantageously eliminate process steps for preforming the workpiece. Furthermore, with the tool described here, for example, components with undercuts can be produced.
- a method for forming a workpiece by hydroforming is specified.
- a workpiece to be formed as well as a tool described herein are provided.
- the tool may have one or more features of the aforementioned embodiments. The features described so far and below can apply both to the tool for hydroforming and to the method for forming a workpiece.
- the workpiece to be formed is introduced into the tool in an opened state of the tool, so that it is arranged between the tool segments. Furthermore, the workpiece is deformed in the tool by fluidic internal high pressure, wherein during forming the at least three movable tool segments of the tool are in direct contact with the workpiece.
- the internal high pressure can z. B. be introduced by a water-oil emulsion in the formed as a hollow body workpiece.
- the movable tool segments in the closed state of the tool in an imaginary cross-sectional plane form a closed circumferential Kavmaschinesumrissline.
- the movable tool segments form a cavity in the closed state of the tool, wherein the workpiece is not completely in contact with the surface of the cavity at least in sections during forming.
- the workpiece stands preferably not over the entire circumference to 100% with the cavity to the surface or the engraving in contact.
- two directly adjacent movable tool segments can define a parting line at the transition from one tool segment to the next tool segment, the workpiece preferably not having direct contact with the tool segments in the region of the parting lines.
- Component radii of the workpiece in areas which are not in contact with the engraving or cavity surface may be e.g. via process parameters, e.g. over the pressure or e.g. also be specifically controlled via wall thicknesses.
- the method described here is characterized in that a production of components with undercuts is possible. Furthermore, it can advantageously be dispensed with preforming of the workpiece.
- FIG. 1 A tool for hydroforming a workpiece according to the prior art
- Figures 5 to 8 show various schematic representations of a tool described herein or a method described herein according to an embodiment.
- identical or identically acting components may each be provided with the same reference numerals.
- the illustrated elements and their proportions with each other are basically not to be considered as true to scale. Rather, individual elements can be shown exaggeratedly thick or large in size for better representability and / or better understanding.
- FIGS. 1 to 4 show schematic representations of a tool 1 and a method for hydroforming a workpiece 2 according to the prior art in various views.
- FIG. 1 shows a schematic perspective illustration.
- FIGS. 2 to 4 show sectional views, with FIG. 2 showing the tool 1 in an opened state, FIG. 4 the tool 1 in the closed state and FIG. 3 an enlarged detail G of FIG.
- the tool 1 has a first tool segment 3 and a second tool segment 4, wherein the two tool segments 3, 4 form a closed cavity 7 in the closed state 10 of the tool 1.
- the workpiece 2 is shown in two different representations, namely in a representation before forming and in a representation after the forming.
- a disadvantage of the method shown in connection with FIGS. 1 to 4 is that the dividing line formed between the tool segments 3, 4 is in direct contact with the workpiece 2 during forming.
- the vote of the dividing line can be very complicated in the design or manufacture of the tool 1.
- FIGS. 5 to 8 show various schematic representations of a tool 1 for hydroforming a workpiece 2 according to one exemplary embodiment.
- FIG. 5 shows a perspective view of the tool 1 and of a workpiece 2 to be reshaped or formed.
- FIGS. 6 to 8 show sectional views, FIG. 6 showing the tool 1 in an opened state, FIG. 8 the tool 1 in the closed position Condition and the figure 7 show an enlarged detail H of Figure 6.
- the tool 1 is designed as a hydroforming tool and has four movable tool segments 3, 4, 5, 6, which give a shape defining the cavity 7 for receiving and forming a workpiece 2, on.
- the 4 movable tool segments 3, 4, 5, 6 at least partially form the molding cavity completely, in such a way that in an imaginary cross-sectional plane a closed circumferential Kavmaschinesumrissline by the four movable tool segments 3, 4, 5th 6 is formed.
- the workpiece 2 When forming the workpiece 2 by a fluidic internal high pressure, for example by introducing a water-oil emulsion in the than Hollow body formed workpiece 2 is the workpiece 2 in the closed state 10 of the tool 1 is not continuously in contact with the surface of the cavity 7. Especially in areas of formed between 2 tool segments 3, 4, 5, 6 dividing lines 8, the workpiece 2 is not with surface sub-areas 9 of the cavity 7 in contact.
- the tool 1 shown here in connection with FIGS. 5 to 8 and the method described in connection with FIGS. 5 to 8 are advantageously also suitable for reshaping workpieces 2 which have an undercut. Furthermore, can be avoided by the tool 1 in the prior art mandatory pre-forming of workpieces 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016220221.9A DE102016220221A1 (de) | 2016-10-17 | 2016-10-17 | Werkzeug zum Innenhochdruckumformen sowie Verfahren zum Umformen eines Werkstücks durch Innenhochdruckumformen |
| PCT/EP2017/074198 WO2018072974A1 (de) | 2016-10-17 | 2017-09-25 | Werkzeug zum innenhochdruckumformen sowie verfahren zum umformen eines werkstücks durch innenhochdruckumformen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3525952A1 true EP3525952A1 (de) | 2019-08-21 |
| EP3525952B1 EP3525952B1 (de) | 2024-06-26 |
Family
ID=59955572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17772054.7A Active EP3525952B1 (de) | 2016-10-17 | 2017-09-25 | Verfahren zum umformen eines werkstücks durch innenhochdruckumformen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11583913B2 (de) |
| EP (1) | EP3525952B1 (de) |
| CN (1) | CN109496169B (de) |
| DE (1) | DE102016220221A1 (de) |
| WO (1) | WO2018072974A1 (de) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69403722T2 (de) * | 1993-04-19 | 1997-09-25 | Gen Motors Corp | Verfahren zum Formen eines rohrförmigen Elementes |
| DE9411461U1 (de) * | 1994-01-21 | 1994-09-15 | Alcan Deutschland GmbH, 37075 Göttingen | Vorrichtung zum Hochdruckformen von Felgenkränzen |
| US5746080A (en) * | 1995-10-02 | 1998-05-05 | Crown Cork & Seal Company, Inc. | Systems and methods for making decorative shaped metal cans |
| DE19708905C2 (de) | 1997-03-05 | 2002-06-27 | Daimler Chrysler Ag | Verfahren zum Herstellen von Karosserieträgern |
| US6434990B1 (en) * | 1999-01-08 | 2002-08-20 | Formrite Companies, Inc. | Hose fitting and die for preparation |
| DE19907247C2 (de) | 1999-02-19 | 2001-08-23 | Meleghy Hydroforming Gmbh & Co | Vorrichtung zur Herstellung insbesondere bauchiger hinterschnittener Hohlkörper |
| US6415638B1 (en) | 1999-03-26 | 2002-07-09 | Nissan Motor Co., Ltd. | Method and device for forming tubular work into shaped hollow product by using tubular hydroforming |
| US6209372B1 (en) * | 1999-09-20 | 2001-04-03 | The Budd Company | Internal hydroformed reinforcements |
| DE10038717C1 (de) * | 2000-08-09 | 2001-07-19 | Daimler Chrysler Ag | Verfahren zur Herstellung von Durchführungen an Hohlprofilen |
| CN1644264A (zh) * | 2005-01-21 | 2005-07-27 | 哈尔滨工业大学 | 一种能降低成形压力的管状零件内高压成形方法 |
| US8443642B2 (en) * | 2011-10-20 | 2013-05-21 | Ford Global Technologies, Llc | Process for pre-forming cylindrical tubes into tubular members having sharp corners |
| EP2745951B1 (de) * | 2012-12-20 | 2014-11-19 | C.R.F. Società Consortile per Azioni | Verfahren zur Herstellung einer Nockenwelle in einem Verbrennungsmotor |
| TWI547322B (zh) * | 2013-01-04 | 2016-09-01 | 達璞科技有限公司 | 金屬液壓成型方法 |
| DE102013212758A1 (de) | 2013-06-28 | 2014-12-31 | Bayerische Motoren Werke Aktiengesellschaft | Werkzeug zum Vorformen eines Rohrs für ein anschließendes Innenhochdruckumformen, sowie Verfahren zur Herstellung eines solchen Werkzeugs und zur Herstellung eines Bauteils durch Innenhochdruckumformen |
-
2016
- 2016-10-17 DE DE102016220221.9A patent/DE102016220221A1/de active Pending
-
2017
- 2017-09-25 EP EP17772054.7A patent/EP3525952B1/de active Active
- 2017-09-25 WO PCT/EP2017/074198 patent/WO2018072974A1/de not_active Ceased
- 2017-09-25 CN CN201780044248.XA patent/CN109496169B/zh active Active
-
2019
- 2019-01-22 US US16/253,878 patent/US11583913B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018072974A1 (de) | 2018-04-26 |
| DE102016220221A1 (de) | 2018-04-19 |
| US11583913B2 (en) | 2023-02-21 |
| US20190151925A1 (en) | 2019-05-23 |
| EP3525952B1 (de) | 2024-06-26 |
| CN109496169B (zh) | 2023-12-22 |
| CN109496169A (zh) | 2019-03-19 |
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