CA2548271A1 - Method for producing a hollow profile - Google Patents
Method for producing a hollow profile Download PDFInfo
- Publication number
- CA2548271A1 CA2548271A1 CA002548271A CA2548271A CA2548271A1 CA 2548271 A1 CA2548271 A1 CA 2548271A1 CA 002548271 A CA002548271 A CA 002548271A CA 2548271 A CA2548271 A CA 2548271A CA 2548271 A1 CA2548271 A1 CA 2548271A1
- Authority
- CA
- Canada
- Prior art keywords
- profiled section
- hollow profiled
- metal sheet
- forming tool
- high pressure
- 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.)
- Abandoned
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
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
- B21D51/12—Making hollow objects characterised by the structure of the objects objects with corrugated walls
-
- 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
- B21D22/20—Deep-drawing
- B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
-
- 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
-
- 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
- B21D26/021—Deforming sheet bodies
- B21D26/031—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
- B21D26/053—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 characterised by the material of the blanks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a method for producing a hollow profile using a metal forming method under high fluidic pressure. According to said method, the surface of sheet metal is specifically provided with structural elements (2), which increase the maximum moulding degree of the component in the subsequent hydroforming process.
Description
DaimlerChrysler AG
Process for producing a hollow profiled section The present invention relates to a process for producing a hollow profiled section, in particular an internal high-pressure forming process, in accordance with the preamble of claim 1.
The internal high-pressure forming process is used to produce hollow profiled sections or shell profiled sections in particular from sheet metal. In this case, either a sheet-metal blank is deformed to produce a half-shell or two sheet-metal blanks lying on top of one another, which have been welded at the edge sides, are widened to form a hollow profiled section. It is also standard practice for a metal sheet which has been bent to form a hollow profiled section that has been welded along a longitudinal seam to be introduced into an internal high-pressure forming (hydroforming) tool, in order then for an internal high pressure to be introduced into the hollow profiled section by means of a fluid, with the result that the hollow profiled section is then forced apart and comes to bear accurately against the contour of the hydroforming tool.
De 101 04 860 C1 has in this respect disclosed an internal high-pressure forming process, in which two metal sheets resting on top of one another are clamped between two blank holders, which are spaced apart from one another to form an expansion space. The expansion space is delimited at the.top and bottom by two dies. A
fluidic internal high pressure is introduced between the metal sheets, leading to expansion of the metal sheets. The dies are at different distances from the double metal sheet, with the metal sheet located AMENDED SHEET
further away from the opposite die having curved formations. These curved formations form a reserve of material which allows the metal sheet to withstand the greater degree of deformation without being damaged.
When the metal sheet is iz~ contact with the surface of the associated die, the curved formations are smoothed by the internal high pressure in order to complete the forming of the metal sheet.
The component geometry which can be achieved for components deformed by internal high pressure is determined to a considerable extent by the maximum change in peripheral size which the component can undergo during the internal high-pressure forming.
This maximum permissible change in peripheral size is in turn defined by the maximum elongation at break of the material used for the component and the position of the shaping itself. In other words, the maximum achievable shaping in internal high-pressure forming is determined on the; one hand by the maximum permissible change in peripheral size and on the other hand by the original size of the starting material.
If, for example, smooth, longitudinal seam welded tubes or hollow profiled sections are used as starting material, the dimension or diameter of the profiled sections or tubes is defined by the minimum component size, such that a plastic shape change is achieved in all regions of the component during the forming operation.
During manufacture of products of this type by means of internal high-pressure forming, however, one drawback is that in a Large number of applications the maximum achievable shaping is approximately 100 utilized, AMENDED SHEET
which leads to a high scrap rate, entailing considerable costs.
In the automotive engineering industry, it is desirable for structural components to satisfy high demands both with regard to strength and with regard to rigidity.
Furthermore, there is considerable interest in realizing lightweight designs in vehicle construction and therefore reducing the weight of these parts to the maximum possible extent.
This is generally achieved by virtue of the fact that, with a simultaneous reduction in weight, the starting material used is thin metal sheets made from high-strength steels, which have a comparable strength to thicker sheets of conventional steels. The required rigidity, however, is then effected by rigidity-increasing structures, such as for example elevations or bulges and/or depressions in the surface of the component, at least in regions which in subsequent use are exposed to high stresses.
For various strength and design reasons, however, it is also desirable for structured profiled sections to be produced by means of internal high-pressure forming for more complex products than hitherto, which in particular also satisfy the demands imposed by light weight construction. In this context, in particular the frame structural components of the vehicle body are of particular interest.
Working on this basis, the object of the present invention is to produce components of more complex configuration by means of the internal high-pressure forming process, which have the required strength and rigidity properties, without having to completely AMENDED SHEET
utilize the maximum achievable degree of shaping, with the associated high scrap rates.
This object is achieved by the features of patent claim 1.
Accordingly, the invention relates to a process for producing a hollow profiled section, the latter being shaped out of at least one metal sheet by fluidic high pressure. Prior to the shaping operation, the surface of the metal sheet is provided with structure elements in the form of depressions and/or elevations.
To form a curve-structured metal sheet of this type, according to the invention the number, dimensions and contours of the structure elements are deliberately fixed as a function of the properties to be achieved by the component to be produced in this way, so that during the subsequent application of fluidic high pressure the maximum permissible change in peripheral size for the component is complied with and the maximum degree of shaping is increased.
This type of ratio also allows internal high-pressure forming in which the maximum degree of shaping is complied with, so. that the change in peripheral size, if desired, can be reduced.
The process according to the invention is distinguished by the advantage that by increasing the degree of shaping which can be achieved in a component produced for example by hydroforming, this component can be configured with a more favorable design with a view to its subsequent use, in particular with regard to the rigidity and strength properties, for example in respect of the ability to absorb forces, since structured profiled sections of this type can be realized more easily in conjunction with the cold work-AMENDED SHEET
hardening which is associated with the internal high-pressure forming process.
By way of example, the process according to the invention can be used in particular to produce supports for the body of a motor vehicle which satisfy the demands of lightweight construction to a high degree.
The contour of the structure elements in the form of depressions and/or elevations can in principle be selected as desired. During production of these elements, for example by stamping or rolling the sheet metal surface, it is merely necessary to ensure that the stretching of the material in the edge regions of the structure elements is minimized.
According to the invention, therefore, the insertion profile of the component to be deformed, i.e. the contour of the metal sheet which is inserted into the forming tool prior to the widening operation, by virtue of the presence of structure elements, is provided with an increased size. This larger size as it were provides a deformation reserve by providing a larger effective surface area.
In this context, during forming using fluidic high pressure, a higher degree of cold work-hardening can then be achieved in the regions with a smaller size of the components.
It is known that a further influencing variable, in particular with respect to the hydroforming process, is the friction between the work piece and the forming tool during the forming operation. Hitherto, it has been attempted, inter alia, to minimize the friction by providing a corresponding coating on the surface of the starting material.
AMENDED SHEET
The new type of configuration of the metal sheet used with structure elements also makes it possible for at least some of the structure elements, during insertion of the metal sheet into the forming tool, to partially form cavities with respect to the inner surface of the forming tool in order to hold a lubricant which keeps the friction between the inner surface and the metal sheet at a low level. This likewise results in an increase in the maximum permissible change in peripheral size.
Depending on the component which is to be produced, it may be desirable for the structure elements to be retained in those regions of the component which are exposed to high stresses, so as to effect increased rigidity in the completed component. For this purpose, during the deformation of the metal sheet used to form the hollow profiled section, the structure elements are at least partially retained on the surface of the metal sheet, which can be achieved by suitably configuring the contours of the inner surface of the forming tool.
Fig. 1 shows by way of example an excerpt from a metal sheet which is to be used in the process according to the invention.
The metal sheet 1 has a plurality of structure elements
Process for producing a hollow profiled section The present invention relates to a process for producing a hollow profiled section, in particular an internal high-pressure forming process, in accordance with the preamble of claim 1.
The internal high-pressure forming process is used to produce hollow profiled sections or shell profiled sections in particular from sheet metal. In this case, either a sheet-metal blank is deformed to produce a half-shell or two sheet-metal blanks lying on top of one another, which have been welded at the edge sides, are widened to form a hollow profiled section. It is also standard practice for a metal sheet which has been bent to form a hollow profiled section that has been welded along a longitudinal seam to be introduced into an internal high-pressure forming (hydroforming) tool, in order then for an internal high pressure to be introduced into the hollow profiled section by means of a fluid, with the result that the hollow profiled section is then forced apart and comes to bear accurately against the contour of the hydroforming tool.
De 101 04 860 C1 has in this respect disclosed an internal high-pressure forming process, in which two metal sheets resting on top of one another are clamped between two blank holders, which are spaced apart from one another to form an expansion space. The expansion space is delimited at the.top and bottom by two dies. A
fluidic internal high pressure is introduced between the metal sheets, leading to expansion of the metal sheets. The dies are at different distances from the double metal sheet, with the metal sheet located AMENDED SHEET
further away from the opposite die having curved formations. These curved formations form a reserve of material which allows the metal sheet to withstand the greater degree of deformation without being damaged.
When the metal sheet is iz~ contact with the surface of the associated die, the curved formations are smoothed by the internal high pressure in order to complete the forming of the metal sheet.
The component geometry which can be achieved for components deformed by internal high pressure is determined to a considerable extent by the maximum change in peripheral size which the component can undergo during the internal high-pressure forming.
This maximum permissible change in peripheral size is in turn defined by the maximum elongation at break of the material used for the component and the position of the shaping itself. In other words, the maximum achievable shaping in internal high-pressure forming is determined on the; one hand by the maximum permissible change in peripheral size and on the other hand by the original size of the starting material.
If, for example, smooth, longitudinal seam welded tubes or hollow profiled sections are used as starting material, the dimension or diameter of the profiled sections or tubes is defined by the minimum component size, such that a plastic shape change is achieved in all regions of the component during the forming operation.
During manufacture of products of this type by means of internal high-pressure forming, however, one drawback is that in a Large number of applications the maximum achievable shaping is approximately 100 utilized, AMENDED SHEET
which leads to a high scrap rate, entailing considerable costs.
In the automotive engineering industry, it is desirable for structural components to satisfy high demands both with regard to strength and with regard to rigidity.
Furthermore, there is considerable interest in realizing lightweight designs in vehicle construction and therefore reducing the weight of these parts to the maximum possible extent.
This is generally achieved by virtue of the fact that, with a simultaneous reduction in weight, the starting material used is thin metal sheets made from high-strength steels, which have a comparable strength to thicker sheets of conventional steels. The required rigidity, however, is then effected by rigidity-increasing structures, such as for example elevations or bulges and/or depressions in the surface of the component, at least in regions which in subsequent use are exposed to high stresses.
For various strength and design reasons, however, it is also desirable for structured profiled sections to be produced by means of internal high-pressure forming for more complex products than hitherto, which in particular also satisfy the demands imposed by light weight construction. In this context, in particular the frame structural components of the vehicle body are of particular interest.
Working on this basis, the object of the present invention is to produce components of more complex configuration by means of the internal high-pressure forming process, which have the required strength and rigidity properties, without having to completely AMENDED SHEET
utilize the maximum achievable degree of shaping, with the associated high scrap rates.
This object is achieved by the features of patent claim 1.
Accordingly, the invention relates to a process for producing a hollow profiled section, the latter being shaped out of at least one metal sheet by fluidic high pressure. Prior to the shaping operation, the surface of the metal sheet is provided with structure elements in the form of depressions and/or elevations.
To form a curve-structured metal sheet of this type, according to the invention the number, dimensions and contours of the structure elements are deliberately fixed as a function of the properties to be achieved by the component to be produced in this way, so that during the subsequent application of fluidic high pressure the maximum permissible change in peripheral size for the component is complied with and the maximum degree of shaping is increased.
This type of ratio also allows internal high-pressure forming in which the maximum degree of shaping is complied with, so. that the change in peripheral size, if desired, can be reduced.
The process according to the invention is distinguished by the advantage that by increasing the degree of shaping which can be achieved in a component produced for example by hydroforming, this component can be configured with a more favorable design with a view to its subsequent use, in particular with regard to the rigidity and strength properties, for example in respect of the ability to absorb forces, since structured profiled sections of this type can be realized more easily in conjunction with the cold work-AMENDED SHEET
hardening which is associated with the internal high-pressure forming process.
By way of example, the process according to the invention can be used in particular to produce supports for the body of a motor vehicle which satisfy the demands of lightweight construction to a high degree.
The contour of the structure elements in the form of depressions and/or elevations can in principle be selected as desired. During production of these elements, for example by stamping or rolling the sheet metal surface, it is merely necessary to ensure that the stretching of the material in the edge regions of the structure elements is minimized.
According to the invention, therefore, the insertion profile of the component to be deformed, i.e. the contour of the metal sheet which is inserted into the forming tool prior to the widening operation, by virtue of the presence of structure elements, is provided with an increased size. This larger size as it were provides a deformation reserve by providing a larger effective surface area.
In this context, during forming using fluidic high pressure, a higher degree of cold work-hardening can then be achieved in the regions with a smaller size of the components.
It is known that a further influencing variable, in particular with respect to the hydroforming process, is the friction between the work piece and the forming tool during the forming operation. Hitherto, it has been attempted, inter alia, to minimize the friction by providing a corresponding coating on the surface of the starting material.
AMENDED SHEET
The new type of configuration of the metal sheet used with structure elements also makes it possible for at least some of the structure elements, during insertion of the metal sheet into the forming tool, to partially form cavities with respect to the inner surface of the forming tool in order to hold a lubricant which keeps the friction between the inner surface and the metal sheet at a low level. This likewise results in an increase in the maximum permissible change in peripheral size.
Depending on the component which is to be produced, it may be desirable for the structure elements to be retained in those regions of the component which are exposed to high stresses, so as to effect increased rigidity in the completed component. For this purpose, during the deformation of the metal sheet used to form the hollow profiled section, the structure elements are at least partially retained on the surface of the metal sheet, which can be achieved by suitably configuring the contours of the inner surface of the forming tool.
Fig. 1 shows by way of example an excerpt from a metal sheet which is to be used in the process according to the invention.
The metal sheet 1 has a plurality of structure elements
2 in the form of elevations or curved formations distributed uniformly.
The metal sheet 1 is then bent to form a, for example, rotational symmetrical tubular semi-finished hollow profiled section and is welded at the abutting surfaces along a longitudinal seam to form this semi-finished hollow profiled section, so that structure elements 2 in the form of curved formations of this type are AMENDED SHEET
provided over the entire periphery of the semi-finished hollow profiled section.
The structure elements 2 are in particular circle-s symmetrical, so that the stretching of the material in the edge region of the curved formations 2 is minimized.
Then, the semi-finished hollow profiled section is widened by means of internal high pressure in an internal high-pressure forming tool to produce the hollow profiled section.
Alternatively, it is conceivable for the hollow profiled section to be formed from two metal sheets 1, which are first of all placed on top of one another and then clamped inside an internal high-pressure forming tool. Then, a pressurized fluid is introduced between the metal sheets, which by exerting an internal high pressure by means of the pressurized fluid are spread open and widened to form the hollow profiled section.
In a further variant of the invention, as a deviation from the first exemplary embodiment mentioned above, the semi-finished hollow profiled section, after the longitudinal seam welding, in an external high-pressure forming tool is shaped to form the hollow profiled section by interaction of a fluidic high pressure directed from the outside inward with a die that has been introduced in the interior of the semi-finished hollow profiled section, the semi-finished hollow profiled section being pressed accurately in terms of contours onto the die, the shape and contours of which represent an image of the hollow profiled section.
In all the exemplary embodiments, the metal sheets 1, the shaping of which leads to the desired hollow AMENDED SHEET
profiled section, have structure elements 2 in the form of curved formations.
AMENDED SHEET
The metal sheet 1 is then bent to form a, for example, rotational symmetrical tubular semi-finished hollow profiled section and is welded at the abutting surfaces along a longitudinal seam to form this semi-finished hollow profiled section, so that structure elements 2 in the form of curved formations of this type are AMENDED SHEET
provided over the entire periphery of the semi-finished hollow profiled section.
The structure elements 2 are in particular circle-s symmetrical, so that the stretching of the material in the edge region of the curved formations 2 is minimized.
Then, the semi-finished hollow profiled section is widened by means of internal high pressure in an internal high-pressure forming tool to produce the hollow profiled section.
Alternatively, it is conceivable for the hollow profiled section to be formed from two metal sheets 1, which are first of all placed on top of one another and then clamped inside an internal high-pressure forming tool. Then, a pressurized fluid is introduced between the metal sheets, which by exerting an internal high pressure by means of the pressurized fluid are spread open and widened to form the hollow profiled section.
In a further variant of the invention, as a deviation from the first exemplary embodiment mentioned above, the semi-finished hollow profiled section, after the longitudinal seam welding, in an external high-pressure forming tool is shaped to form the hollow profiled section by interaction of a fluidic high pressure directed from the outside inward with a die that has been introduced in the interior of the semi-finished hollow profiled section, the semi-finished hollow profiled section being pressed accurately in terms of contours onto the die, the shape and contours of which represent an image of the hollow profiled section.
In all the exemplary embodiments, the metal sheets 1, the shaping of which leads to the desired hollow AMENDED SHEET
profiled section, have structure elements 2 in the form of curved formations.
AMENDED SHEET
Claims (6)
1. A process for producing a hollow profiled section which is shaped out of at least one metal sheet (1) by means of a fluidic high pressure, wherein prior to the shaping of the metal sheet (1) by means of fluidic high pressure the surface of the metal sheet (1) is provided with structure elements (2) in the form of depressions and/or elevations, the number, dimensions and contours of the structure elements (2) being selected in such a way that during the widening the maximum permissible change in peripheral size for the component is complied with and the maximum degree of shaping is increased, characterized in that during the introduction of the hollow profiled section into the forming tool the structural elements (2), with respect to the inner surface of the forming tool, in some cases enclose cavities for holding a lubricant.
2. The process as claimed in claim 1, characterized in that the metal sheet (1) is bent to form a tubular semi-finished hollow profiled section, is then longitudinal seam welded and then widened by means of internal high pressure in an internal high-pressure forming tool to form the hollow profiled section.
3. The process as claimed in claim 1, characterized in that two metal sheets (1) are placed on top of one another and clamped in an internal high-pressure forming tool, after which a pressurized fluid is introduced between the metal sheets (1), and in that the metal sheets (1) are spread apart and widened to form the hollow profiled section by the application of an internal high pressure by means of the pressurized fluid.
4. The process as claimed in claim 1, characterized in that the metal sheet (1) is bent to form a tubular semi-finished hollow profiled section and is then longitudinal seam welded, and in that the semi-finished hollow profiled section is shaped into the hollow profiled section in an external high-pressure forming tool by the interaction of a fluidic high pressure directed from the outside inward with a die which has been introduced into the interior of the semi-finished hollow profiled section.
5. The process as claimed in one of claims 1 to 4, characterized in that the structure elements (2) are at least partially retained on the surface of the metal sheet (1) during the deformation used to form the hollow profiled section.
6. The process as claimed in one of the preceding claims, characterized in that the structure elements (2) are stamped or rolled on the surface of the metal sheet (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003157119 DE10357119B4 (en) | 2003-12-06 | 2003-12-06 | Process for producing a hollow profile |
| DE10357119.1 | 2003-12-06 | ||
| PCT/EP2004/012692 WO2005053871A1 (en) | 2003-12-06 | 2004-11-10 | Method for producing a hollow profile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2548271A1 true CA2548271A1 (en) | 2005-06-16 |
Family
ID=34638451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002548271A Abandoned CA2548271A1 (en) | 2003-12-06 | 2004-11-10 | Method for producing a hollow profile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1708832B1 (en) |
| CA (1) | CA2548271A1 (en) |
| DE (2) | DE10357119B4 (en) |
| WO (1) | WO2005053871A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090255317A1 (en) * | 2008-04-11 | 2009-10-15 | Thyssenkrupp Steel Ag | Method for the production of high-precision half shells with high dimensional precision |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009050277A1 (en) * | 2009-10-21 | 2011-05-19 | Lothar Walther Verwaltungsgesellschaft Mbh & Co. Kg | Method for producing inner profile at inner wall of cavity region of semi-finished product, involves providing shaping device, particularly bolt with external profile to define shaped region negatively designed to inner profile |
| DE102021213010B4 (en) | 2021-11-18 | 2023-06-15 | Ipu Ingenieurgesellschaft Braunschweig Mbh | Process for the mold-free production of a component with relief and component with relief |
| US11982200B1 (en) | 2023-06-23 | 2024-05-14 | Pratt & Whitney Canada Corp. | Structure with structural reinforcement patterns |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4761982A (en) * | 1986-10-01 | 1988-08-09 | General Motors Corporation | Method and apparatus for forming a heat exchanger turbulator and tube |
| US4840053A (en) * | 1987-07-29 | 1989-06-20 | Mitsui & Co., Ltd. | Method for manufacturing a pipe with projections |
| DE4419652A1 (en) * | 1994-06-04 | 1995-12-07 | Meckenstock H W Kg | Plate=shaped element for light component mfr. |
| DE19803782B4 (en) * | 1998-01-22 | 2005-06-16 | Hellwig, Udo, Prof. Dr. | Method and device for shaping bodies by means of secondary forming transformation |
| DE10104860C1 (en) * | 2001-02-03 | 2002-02-07 | Daimler Chrysler Ag | Production of a hollow body from two plates has two dies with a high internal fluid pressure between them to force the plates against the die surfaces with structured local curves to prevent creasing/folding |
-
2003
- 2003-12-06 DE DE2003157119 patent/DE10357119B4/en not_active Expired - Fee Related
-
2004
- 2004-11-10 CA CA002548271A patent/CA2548271A1/en not_active Abandoned
- 2004-11-10 WO PCT/EP2004/012692 patent/WO2005053871A1/en not_active Ceased
- 2004-11-10 EP EP04797759A patent/EP1708832B1/en not_active Expired - Lifetime
- 2004-11-10 DE DE502004004916T patent/DE502004004916D1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090255317A1 (en) * | 2008-04-11 | 2009-10-15 | Thyssenkrupp Steel Ag | Method for the production of high-precision half shells with high dimensional precision |
| US8240184B2 (en) | 2008-04-11 | 2012-08-14 | Thyssenkrupp Steel Ag | Method for producing high-precision half shells |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1708832A1 (en) | 2006-10-11 |
| EP1708832B1 (en) | 2007-09-05 |
| DE10357119A1 (en) | 2005-07-14 |
| DE10357119B4 (en) | 2005-11-24 |
| DE502004004916D1 (en) | 2007-10-18 |
| WO2005053871A1 (en) | 2005-06-16 |
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