EP2205370A1 - Verfahren und vorrichtung zur herstellung eines hohlkörpers und hohlkörper - Google Patents
Verfahren und vorrichtung zur herstellung eines hohlkörpers und hohlkörperInfo
- Publication number
- EP2205370A1 EP2205370A1 EP08838645A EP08838645A EP2205370A1 EP 2205370 A1 EP2205370 A1 EP 2205370A1 EP 08838645 A EP08838645 A EP 08838645A EP 08838645 A EP08838645 A EP 08838645A EP 2205370 A1 EP2205370 A1 EP 2205370A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow body
- die
- cross
- sectional area
- produced
- 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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
- B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
- B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/025—Stamping using rigid devices or tools for tubular articles
-
- 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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
Definitions
- the invention relates to a method for producing a hollow body made of metal, which has at least one first axial section with a first cross-sectional area and a second axial section with a second cross-sectional area and in which both axial sections of the hollow body are connected to one another via a form transition running in a radial plane. Moreover, the invention relates to a device for carrying out the method.
- Hollow bodies are frequently required in motor vehicle construction and in pipeline construction, which have large cross-sectional shape changes in the axial direction of only short axial lengths, for example from a small cross section to a large cross section.
- the shape transition between the different cross-sectional shapes having axial portions of these hollow body therefore extends substantially in a radial plane.
- an exhaust system of a motor vehicle can be considered, which has a correspondingly executed hollow body in the region of the silencer.
- Other hollow bodies are, for example, support ends of a frame structure of a motor vehicle or fittings of piping systems. All of these hollow bodies are often produced by a plurality of interconnected, in particular welded, sheets, which have been formed into a corresponding hollow body.
- the strength of the hollow body thus produced is due to the variety the weld] edoch but worthy of improvement.
- weld are susceptible to corrosion and increase the cost of manufacturing.
- a variety of manufacturing methods are known to produce, for example, from a tubular body corresponding hollow body with strongly stepped shape transition.
- the printing of sheet blanks or thermoformed preform bodies also allows radially extending Formubergange.
- these Formubergange can usually be made only at the pipe ends and lead to a strong thinning of the sheet thickness. The same applies to the hydroforming, which requires additional high investments in the field of tools.
- Japanese Patent Application Publication JP 2005279706 A moreover discloses a method for producing a hollow body with a shape transition, in which an axial section having a reduced cross-sectional area is drawn out of a region having a larger cross-sectional area by a forming die inserted into the hollow body.
- a forming die inserted into the hollow body.
- the present invention seeks to provide a method and an apparatus for producing a generic hollow body available, which or which can be operated economically and with which or with which a high strength having hollow body with substantially in one Radial level extending shape transitions and almost constant sheet thickness can be produced.
- the above-mentioned object is procedurally achieved in that a preform body is produced, which has at least one extending in the axial direction of the hollow body to be produced, arranged between the first and second axial section transition region, wherein in the transition region, the cross-sectional area of the preform body from the cross-sectional area of the first axial portion into the cross-sectional area of the second axial portion, preferably continuously changing, the preform body is received in a die, wherein the die has the final outer shape of the hollow body to be produced, a forming mandrel is inserted into the preform body, wherein the forming mandrel Has inner shape of the hollow body to be produced and is compressed by an axial movement of the mandrel of the preform body in the die in the final shape of the hollow body.
- the sheet thickness decrease is minimal, since during the formating of the molding transition or by the compression of the transition region of the preform a material flow is generated, which significantly reduces the sheet thickness decrease m strongly deformed areas.
- the hollow body produced in this way with a shape transition between two axial sections extending essentially in a radial plane, has a very homogeneous sheet metal thickness.
- the hollow body can be carried out very economically on the other hand, owing to the two-step process, namely the preparation of the preform body and the compression molding of the preform body, on the other hand, the resulting hollow body has very good properties in terms of stability.
- any shape transition that has a deviation of not more than +/- 20 ° from the perpendicular to the axial direction is regarded as a shape transition that essentially proceeds in a radial plane.
- the shape transition running essentially in a radial plane takes place according to the invention between axial sections of the hollow body having different cross-sectional areas, ie axial sections having a small cross-section and / or between different cross-sectional shapes, such as axial and polygonal axial sections of the hollow body.
- the axial lengths of the axial sections of the hollow body to be produced with different cross-sectional areas can have different lengths, preferably a division of for example, 1/3 to 2/3, wherein 1/3 of the length refers to larger cross-sectional areas.
- the known methods it has hitherto often only been possible to introduce, in end regions, radially extending moldings, for example into a tubular body.
- the preform body is produced from at least one circuit board, for example using the rolling-in technique or by U-forming. Both methods, the roll-in technique and the UO-forming, have already been tested and allow an economical production of hollow bodies, which can be used as Vorformkorper.
- the formed board is welded together in the edge area.
- the preformed bodies produced by these processes continue to have very good forming properties owing to the mate ⁇ alschonenden pre-treatment.
- the die upsetting this also allows large degrees of deformation to be achieved.
- the length of the transition region of the preform body is selected depending on the wall thickness of the formed board, the shape change in the shape transition and depending on the material.
- the process reliability of the erfmdungsge awkwarden method further increased and in particular the sheet thickness change can be controlled by the erfmdungsge4,e method.
- the manufacturability of the preform body by means of rolling-in technique or UO-forming should additionally be given.
- the inventive method is particularly advantageous if the preform body has the outer and inner shape of the hollow body to be produced in at least one axial section.
- the upsetting is particularly simple, since the mandrel can be arranged in a simple manner displaceable m this axial portion of the preform.
- rohrformige Vorformkorper be reshaped, so that in a simple way Fittmge or parts of exhaust systems or support ends of a frame structure of a motor vehicle are produced.
- functional elements or secondary shaping elements are introduced into the hollow body to be produced, so that the subsequent introduction of these elements can be dispensed with.
- the introduction of the functional elements and / or secondary features can be integrated xn the die for producing the Vorformkorpers or xm die for forming the shape of Formgangsgangs as well as in the mandrel itself.
- Functional elements or secondary features may be, for example, Verpragept, holes or tabs in the lateral surface of the hollow body. Other functional elements are also conceivable.
- blanks made of steel a steel alloy, in particular made of high-strength steels, are preferably used for producing the preform body.
- a steel alloy in particular made of high-strength steels, are preferably used for producing the preform body.
- the inventive method allows the use of high-strength steel, as a total of no large degrees of deformation for the production of the hollow body are needed.
- the preform body is made of "tailored blanks". "Tailored blanks" are tailored to the particular application, for example, consisting of sheets with different material strengths and / or Mate ⁇ alket sheet blanks.
- a device in that a first die for producing a Vorformkorpers is provided from a board using the Einrolltechnik or the UO-forming process, wherein the first die is formed so that the preform body has at least one transition region extending between the first and second axial sections in the axial direction of the hollow body to be produced, and in the transition region the cross-sectional area of the preform body preferably continuously changes from the cross-sectional area of the first axial section into the cross-sectional area of the second axial section, and at least one second A die for receiving the produced preform body is provided with a forming mandrel, the second die having the outer end shape of the hollow body, the forming mandrel the inner end shape of the hollow body to be produced a uf réelle and the mandrel is axially displaceable relative to the second die.
- the method according to the invention can be carried out in an economical manner, so that the advantages of the inventive method are pointed out with regard to the advantages of the device according to the invention becomes.
- the necessary dies for producing the preform body and for upsetting the hollow body in its final form require no high investment and thus contribute to the economy of the process.
- first and / or the second die and / or the forming mandrel has means for introducing functional and / or secondary shaped elements into the hollow body. These do not have to be introduced by additional steps or devices.
- a further advantageous embodiment of the inventive device provides that means for automatically transporting a board in the first die of the device and / or means for inserting the
- the agents significantly improve the cycle times for producing the hollow body and, to that extent, lead to a particularly economical method of producing the hollow body.
- the above object is achieved by a hollow body made of metal, which has at least a first axial section with a first cross-sectional area and a second axial section with a second cross-sectional area and wherein both axial sections of the hollow body over a substantially in a radial plane extending form transition with each other connected, thereby solved that this is produced by the erfmdungsgespecializeden method and the maximum sheet thickness change, in particular in the range of the shape transition amounts to +/- 15%.
- the inventive method allows a particularly gentle production of a hollow body with essentially m a radial plane form transition between axial sections of different cross-sectional areas and thus allows particularly small changes in sheet thickness of the hollow body.
- hollow body having a radial shape transition can be made available by the hollow body made of steel, a steel alloy and / or high-strength steel.
- "tailored blanks" can also be used to produce the hollow bodies, so that adaptation of the hollow body to the loads occurring in the application can be achieved with simultaneous weight optimization.
- the use of high-strength steel leads to the hollow body thus produced are adapted to high loads.
- Vorformkorper an exemplary embodiment of a erfmdungsgeorder prepared hollow body
- Vorformkorpers an exemplary embodiment of a erfmdungsgedorfen device before the upsetting of Vorformkorpers m a schematic axial section view and
- the Vorformkorper 1 is first shown in a schematic, axial sectional view.
- the preform body has a first axial section 2 with a first cross-sectional area and a second axial section 3 with a second cross-sectional area.
- the cross-sectional area of the first axial section 2 is smaller than the cross-sectional area of the second axial section 3.
- the cross-sectional area of the axial section 2 changes to the cross-sectional area of the axial section 3
- Exemplary embodiment is the shape transition in the m axial direction extending transition region 4 continuously or linearly. But there are also other Formubergange conceivable.
- the preform body, as well as the finished hollow body has a circular cross-section and is therefore particularly simple. As already stated, however, the shape transition can also take place between different cross-sectional shapes.
- FIG. 2 now shows, in a schematic, axial sectional view, an exemplary embodiment of a die for shaping the preform body 1 for carrying out the method according to the invention.
- the die 5 has a die 6, which corresponds to the outer shape of the hollow body to be produced.
- the preform body 1 is already inserted and the forming mandrel 7 is inserted into the preform body 1.
- the mandrel 7 may additionally comprise, not shown means for introducing functional and / or secondary features in the hollow body. Other means, not shown, for introducing functional elements can also be provided in the die 5, but also in the forming mandrel 7.
- the forming mandrel 7 is now displaced axially in the direction of the arrow so that the transition region 4 of the preform body 1 is compressed into the forming passage 8 of the hollow body. In this way it is achieved that the sheet thickness change, despite the generation of the radially extending shaping passage 8, remains moderate and insofar an improved hollow body with a radial shape transition 8 can be made available, FIG. 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007050337A DE102007050337B4 (de) | 2007-10-18 | 2007-10-18 | Formgestauchter Hohlkörper |
PCT/EP2008/064047 WO2009050270A1 (de) | 2007-10-18 | 2008-10-17 | Verfahren und vorrichtung zur herstellung eines hohlkörpers und hohlkörper |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2205370A1 true EP2205370A1 (de) | 2010-07-14 |
EP2205370B1 EP2205370B1 (de) | 2012-12-19 |
Family
ID=40297920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08838645A Not-in-force EP2205370B1 (de) | 2007-10-18 | 2008-10-17 | Verfahren und vorrichtung zur herstellung eines hohlkörpers und hohlkörper |
Country Status (5)
Country | Link |
---|---|
US (1) | US9283602B2 (de) |
EP (1) | EP2205370B1 (de) |
DE (1) | DE102007050337B4 (de) |
ES (1) | ES2401306T3 (de) |
WO (1) | WO2009050270A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016123265A1 (de) | 2016-12-01 | 2018-06-07 | Linde + Wiemann SE & Co. KG | Verfahren und Halbzeug zur Herstellung eines wenigstens partiell gehärteten Profilbauteils |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1566645A (en) | 1925-12-22 | Alfred b | ||
DE19827798A1 (de) * | 1998-06-23 | 1999-12-30 | Thyssenkrupp Stahl Ag | Verfahren und Vorrichtung zum Herstellen von längsnahtgeschweißten Rohren aus ebenen Blechzuschnitten |
JP2007501714A (ja) | 2003-05-08 | 2007-02-01 | ノーブル、メタル、プロセシング、インコーポレイテッド | 金属製管のプレス成形方法 |
DE10329424B4 (de) | 2003-07-01 | 2005-04-28 | Thyssenkrupp Stahl Ag | Verfahren zum Herstellen eines längsgeschlitzten Hohlprofils mit mehreren, im Querschnitt verschiedenen Längsabschnitten aus einer ebenen Blechplatine |
JP2005279706A (ja) * | 2004-03-29 | 2005-10-13 | Calsonic Kansei Corp | 金属管の端部縮径加工方法および装置 |
JP2006002898A (ja) | 2004-06-18 | 2006-01-05 | Calsonic Kansei Corp | パイプの接続方法およびパイプの接続構造 |
-
2007
- 2007-10-18 DE DE102007050337A patent/DE102007050337B4/de not_active Expired - Fee Related
-
2008
- 2008-10-17 ES ES08838645T patent/ES2401306T3/es active Active
- 2008-10-17 EP EP08838645A patent/EP2205370B1/de not_active Not-in-force
- 2008-10-17 US US12/738,343 patent/US9283602B2/en not_active Expired - Fee Related
- 2008-10-17 WO PCT/EP2008/064047 patent/WO2009050270A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009050270A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007050337B4 (de) | 2009-12-31 |
DE102007050337A1 (de) | 2009-04-23 |
EP2205370B1 (de) | 2012-12-19 |
US20100294014A1 (en) | 2010-11-25 |
US9283602B2 (en) | 2016-03-15 |
WO2009050270A1 (de) | 2009-04-23 |
ES2401306T3 (es) | 2013-04-18 |
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