US20150315666A1 - Induction annealing as a method for expanded hydroformed tube formability - Google Patents
Induction annealing as a method for expanded hydroformed tube formability Download PDFInfo
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- US20150315666A1 US20150315666A1 US14/266,065 US201414266065A US2015315666A1 US 20150315666 A1 US20150315666 A1 US 20150315666A1 US 201414266065 A US201414266065 A US 201414266065A US 2015315666 A1 US2015315666 A1 US 2015315666A1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- 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
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- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
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- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
- C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- This document relates generally to the metal forming field and, more particularly, to a method for hydroforming a workpiece utilizing induction annealing to provide for enhanced formability.
- Hydroforming is a term applied to sheet and tube forming in which the metal is formed against a die by fluid pressure. This may be done with an internal fluid pressure, with an applied axial load to a tube or with a one-sided die in which the sheet metal is formed by a bladder/diaphragm. Hydroforming typically uses conventional, single action hydraulic presses with high ram forces.
- induction annealing allows for local heating of a workpiece to a specified temperature in a specified time using an induction coil.
- hydroformed aluminum tubes are used to form the A-pillar roof rail of a vehicle structure.
- This type of part may be made with structural or seamless extruded tubes.
- Structural tubes have better wall and diameter dimensional tolerances and are more efficient to extrude but have lower formability for bending, pre-forming, and hydroforming processes.
- structural tubes can only be used to form less challenging part shapes in hydroforming.
- Seamless tubes are less efficient to extrude relative to structural tubes due to scrap losses and seamless press cycle time limitations and have dimensional tolerances on wall and diameter that can be at least two time that of structural round tube.
- Seamless tubes can also have significantly higher formability which has made them the preferred material for hydroforming parts having complex, variable cross-sections such as A-pillar roof rails.
- induction annealing recovers sufficient workpiece formability to allow the less formable structural tubes in the production of A-pillar roof rails. Surprisingly, the formability may be recovered without compromising subsequent heat treatment to strengthen the roof rails.
- a method of hydroforming a workpiece includes the steps of bending the workpiece into a first preliminary shape, pre-forming the workpiece into a second preliminary shape, induction annealing the workpiece at a temperature between 120-160° C. and hydroforming the workpiece to a desired shape.
- the method may also include ramping to the induction annealing temperature in 10-30 seconds.
- the method may include completing the induction annealing between the pre-forming and the hydroforming steps.
- the method includes completing the induction annealing between the pre-bending and the pre-forming.
- the induction annealing is completed between the bending and preforming steps and between the pre-forming and hydroforming steps.
- the method may further include trimming the workpiece to desired length. Further the method may include heat treating the workpiece after hydroforming in order to impart desired T6 strength properties. That heat treating may be completed at 160-200° C. for 4 to 10 hours.
- the workpiece may be made from AA6XXX aluminum alloy such as AA6082-T4. Further the workpiece may be an A-pillar roof rail. Accordingly the method may include completing the induction annealing to the A-pillar roof rail at a first bend of an A-pillar portion of the workpiece. That induction annealing may be completed (a) at a temperature of 120-160° C. with a ramp of 20 to 30 seconds, (b) at a temperature of 135-145° C. with a ramp of 20 to 30 seconds or (c) at a temperature of about 140° C. with a ramp of 25 to 30 seconds.
- a method of hydroforming a workpiece comprises: (a) bending the workpiece into a first preliminary shape; (b) pre-forming the workpiece into a second preliminary shape; (c) induction annealing the workpiece at a temperature between 120-160° C. to improve total elongation of the workpiece while not compromising final strength properties of the workpiece; (d) hydroforming the workpiece to a desired shape; and (e) heat treating the workpiece at about 180° C. for about six hours to improve final strength properties of the workpiece.
- the method may include using an induction annealing temperature of about 140° C. with a ramp time of 20-30 seconds.
- FIG. 1 is a perspective view illustrating a workpiece received in a channel coil for purposes of induction annealing.
- FIG. 2 is a top plan view of the workpiece illustrating an A-frame roof rail and the A-pillar portion of the A-pillar roof rail subjected to induction annealing.
- FIGS. 3 a , 3 b and 3 c illustrate three alternative hydroforming production processes incorporating induction annealing: in the first the induction annealing takes place between the bending and pre-forming steps, in the second the induction annealing takes place between the pre-forming and hydroforming steps, while in the third the induction annealing takes place between the bending and preforming steps and between the pre-forming and hydroforming steps.
- FIG. 4 is a graphical illustration of T4 total elongation before and after induction annealing of tensile samples cut from extruded tube and subject to pre-straining. Such samples behave similarly to and are representative of A-pillar roof rail response.
- FIG. 5 is a graphic illustration of T6-Temper verification confirming that A-pillar roof rails undergoing induction annealing still reach their desired yield strength after T6 heat treatment.
- the workpiece W is an A-pillar roof rail made from AA6XXX aluminum alloy such as AA6082-T4.
- the workpiece W is positioned in a water-cooled copper “channel” coil C that follows the shape of the workpiece W. More specifically, alternating current flows through the channel coil C (transformer primary) to create an electromagnetic alternating field.
- the workpiece W forms the transformer secondary. Heating efficiency and uniformity is achieved through coil design and contouring of the coil relative to the workpiece shape.
- FIG. 2 illustrates the workpiece W including the A-pillar portion P where induction annealing is completed from point A to point B.
- Portion T indicates the part of the workpiece W that is trimmed during the process as will be described in greater detail below.
- the roof rail portion R of the workpiece W may be of different lengths depending upon the body style of the vehicle (e.g. regular cab, extended cab, crew cab).
- induction annealing is completed at a temperature of between 120-160° C. utilizing a 10-30 second ramp time. In another useful embodiment, induction annealing is completed at a temperature of 130-150° C. utilizing a ramp time of 20-30 seconds. In another useful embodiment, induction annealing is completed at a temperature of 135-145° C. utilizing a ramp time of 20-30 seconds. In yet another useful embodiment, induction annealing is completed at a temperature of about 140° C. utilizing a ramp time of 25-30 seconds.
- FIG. 3 a A first embodiment of a method of hydroforming a workpiece W is illustrated in FIG. 3 a .
- the workpiece W comprises an extruded aluminum tube but it should be appreciated that the workpiece may assume other forms or be made from other metals.
- the method includes bending of the workpiece W into a first preliminary shape (see step 14 ). This is followed by the induction annealing of the workpiece W in the manner previously described (see step 16 ).
- the induction annealing process 16 utilizes current to locally heat the workpiece W in order to alleviate excessive strain hardening within the workpiece thereby allowing for increased formability during later stages of the hydroforming method.
- the pre-forming of the workpiece W into a second preliminary shape is then followed by hydroforming the workpiece W to a desired final shape (note step 20 ).
- the workpiece W is subjected to trimming to a desired length (note step 22 ).
- a heat treatment in order to impart desired strength properties to the workpiece W (note step 24 ).
- the heat treatment is a T6 treatment at 180° C. for six hours in order to induce or impart an average yield strength of typically 290 MPa to the workpiece W.
- the heat treatment may be completed at temperatures between 160-200° C. for 4 to 10 hours.
- the production process includes bending 28 the workpiece W into a first preliminary shape. This is then followed by the pre-forming 30 of the workpiece W into a second preliminary shape. Next the workpiece W is subjected to the induction annealing step 32 to recover formability. This is then followed by the hydroforming 34 , trimming 36 and heat treating 38 steps previously described.
- the production process includes bending 40 the workpiece W into a first preliminary shape. This is followed by the induction annealing 42 of the workpiece W. Next the workpiece W is subjected to pre-forming 44 into a second preliminary shape. The workpiece W is then subjected to another incremental induction anneal 46 . This is followed by hydroforming 48 the workpiece into a desired final shape. Subsequently, the workpiece is trimmed 50 and then subjected to artificial aging by means of heat treatment 52 .
- FIGS. 3 a - 3 c are particularly useful in the production of pickup truck roof rails which undergo significant bending of about 45° at the A-pillar portion P (see FIG. 2 ) in order to support the transition of the workpiece W from the A-pillar into the hinge pillar.
- the data presented in FIGS. 4 and 5 shows that the induction annealing step or stage 16 , 32 allows for an increase in material total elongation (strain) when used (note “IA” parts and also note that “weld” and “no weld” identifies where the tensile sample was cut from the structural tube). In fact upward of double the initial material strain capability is provided in high strain regions. Additionally, and surprisingly, no degradation to T6 Temper or heat treatment properties is observed when induction annealing is completed at temperatures between 120-160° C. for 10-30 seconds. Thus, total elongation is increased while the yield strength of the final workpiece product remains uncompromised. Such a combination of beneficial results could not have been anticipated.
- the method 10 of hydroforming of a workpiece W supports high volume automotive manufacturing.
- Both structural and seamless tubes benefit from the method.
- structural tubes may now be readily used in the production of difficult-to-form A-pillar roof rails.
- the method allows for the use of a higher tolerance and more manufacturing efficient material for hydroforming roof rails.
- the induction annealing process is restricted to the heated region of interest only: that is, the area of bending where plastic strain capability has been reduced by the bending and/or pre-forming steps or stages 14 , 18 , 28 , 30 of the production process. Heating of the tube is localized to the induction annealed region, therefore, there is no specialized equipment required for material handling of the workpiece W in the unheated regions. Further the induction annealing parameters required to restore formability to the workpiece W do not cause post-hydroformed material heat treatment response damage and the formed workpieces (in the illustrated embodiment, A-pillar roof rails), are still able to demonstrate the desired yield strengths.
- an incremental induction annealing step may be completed between both (a) the bending and pre-forming step and (b) the pre-forming and hydroforming steps if desired or at other times during production. All such modifications and variations are within the scope of the appended claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled.
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Abstract
A method of hydroforming a workpiece includes the steps of bending the workpiece into a first preliminary shape, pre-forming the workpiece into a second preliminary shape, induction annealing the workpiece at a temperature between 120-160° C. and hydroforming the workpiece to a desired shape.
Description
- This document relates generally to the metal forming field and, more particularly, to a method for hydroforming a workpiece utilizing induction annealing to provide for enhanced formability.
- Hydroforming is a term applied to sheet and tube forming in which the metal is formed against a die by fluid pressure. This may be done with an internal fluid pressure, with an applied axial load to a tube or with a one-sided die in which the sheet metal is formed by a bladder/diaphragm. Hydroforming typically uses conventional, single action hydraulic presses with high ram forces.
- When using a multiple stage approach to hydroforming various bending/pre-forming steps may occur prior to the final hydroforming of the part. During these initial deformation stages most of the material formability can be exhausted leaving little plastic strain capability for the hydroforming process itself. One way to mitigate the influence of these localized strains is to apply a recovery heat treatment between stages of the hydroforming process. More specifically, induction annealing allows for local heating of a workpiece to a specified temperature in a specified time using an induction coil.
- In one example, hydroformed aluminum tubes are used to form the A-pillar roof rail of a vehicle structure. This type of part may be made with structural or seamless extruded tubes. Structural tubes have better wall and diameter dimensional tolerances and are more efficient to extrude but have lower formability for bending, pre-forming, and hydroforming processes. As a consequence, structural tubes can only be used to form less challenging part shapes in hydroforming. Seamless tubes are less efficient to extrude relative to structural tubes due to scrap losses and seamless press cycle time limitations and have dimensional tolerances on wall and diameter that can be at least two time that of structural round tube. Seamless tubes can also have significantly higher formability which has made them the preferred material for hydroforming parts having complex, variable cross-sections such as A-pillar roof rails. In accordance with our work, it has now been discovered that induction annealing recovers sufficient workpiece formability to allow the less formable structural tubes in the production of A-pillar roof rails. Surprisingly, the formability may be recovered without compromising subsequent heat treatment to strengthen the roof rails.
- In accordance with the purposes and benefits described herein, a method of hydroforming a workpiece is provided. That method includes the steps of bending the workpiece into a first preliminary shape, pre-forming the workpiece into a second preliminary shape, induction annealing the workpiece at a temperature between 120-160° C. and hydroforming the workpiece to a desired shape. The method may also include ramping to the induction annealing temperature in 10-30 seconds. Further the method may include completing the induction annealing between the pre-forming and the hydroforming steps. In an alternative embodiment the method includes completing the induction annealing between the pre-bending and the pre-forming. In yet another embodiment, the induction annealing is completed between the bending and preforming steps and between the pre-forming and hydroforming steps.
- The method may further include trimming the workpiece to desired length. Further the method may include heat treating the workpiece after hydroforming in order to impart desired T6 strength properties. That heat treating may be completed at 160-200° C. for 4 to 10 hours.
- The workpiece may be made from AA6XXX aluminum alloy such as AA6082-T4. Further the workpiece may be an A-pillar roof rail. Accordingly the method may include completing the induction annealing to the A-pillar roof rail at a first bend of an A-pillar portion of the workpiece. That induction annealing may be completed (a) at a temperature of 120-160° C. with a ramp of 20 to 30 seconds, (b) at a temperature of 135-145° C. with a ramp of 20 to 30 seconds or (c) at a temperature of about 140° C. with a ramp of 25 to 30 seconds.
- Stated another way a method of hydroforming a workpiece comprises: (a) bending the workpiece into a first preliminary shape; (b) pre-forming the workpiece into a second preliminary shape; (c) induction annealing the workpiece at a temperature between 120-160° C. to improve total elongation of the workpiece while not compromising final strength properties of the workpiece; (d) hydroforming the workpiece to a desired shape; and (e) heat treating the workpiece at about 180° C. for about six hours to improve final strength properties of the workpiece. In one possible embodiment the method may include using an induction annealing temperature of about 140° C. with a ramp time of 20-30 seconds.
- These and other embodiments of the present method will be set forth in the description which follows, and in part will become apparent to those of ordinary skill in the art by reference to the following description of the method and referenced drawings.
- The accompanying drawings incorporated herein and forming a part of the specification, illustrate several aspects of the present method and together with the description serve to explain certain principles thereof. In the drawings:
-
FIG. 1 is a perspective view illustrating a workpiece received in a channel coil for purposes of induction annealing. -
FIG. 2 is a top plan view of the workpiece illustrating an A-frame roof rail and the A-pillar portion of the A-pillar roof rail subjected to induction annealing. -
FIGS. 3 a, 3 b and 3 c illustrate three alternative hydroforming production processes incorporating induction annealing: in the first the induction annealing takes place between the bending and pre-forming steps, in the second the induction annealing takes place between the pre-forming and hydroforming steps, while in the third the induction annealing takes place between the bending and preforming steps and between the pre-forming and hydroforming steps. -
FIG. 4 is a graphical illustration of T4 total elongation before and after induction annealing of tensile samples cut from extruded tube and subject to pre-straining. Such samples behave similarly to and are representative of A-pillar roof rail response. -
FIG. 5 is a graphic illustration of T6-Temper verification confirming that A-pillar roof rails undergoing induction annealing still reach their desired yield strength after T6 heat treatment. - Reference will now be made in detail to the present preferred embodiments of the method.
- This document relates to a method of hydroforming a workpiece W which incorporates an induction annealing step to enhance formability of the workpiece. In the embodiment illustrated in
FIG. 1 , the workpiece W is an A-pillar roof rail made from AA6XXX aluminum alloy such as AA6082-T4. As illustrated inFIG. 1 , the workpiece W is positioned in a water-cooled copper “channel” coil C that follows the shape of the workpiece W. More specifically, alternating current flows through the channel coil C (transformer primary) to create an electromagnetic alternating field. The workpiece W forms the transformer secondary. Heating efficiency and uniformity is achieved through coil design and contouring of the coil relative to the workpiece shape. -
FIG. 2 illustrates the workpiece W including the A-pillar portion P where induction annealing is completed from point A to point B. Portion T indicates the part of the workpiece W that is trimmed during the process as will be described in greater detail below. Note the roof rail portion R of the workpiece W may be of different lengths depending upon the body style of the vehicle (e.g. regular cab, extended cab, crew cab). - In one embodiment, induction annealing is completed at a temperature of between 120-160° C. utilizing a 10-30 second ramp time. In another useful embodiment, induction annealing is completed at a temperature of 130-150° C. utilizing a ramp time of 20-30 seconds. In another useful embodiment, induction annealing is completed at a temperature of 135-145° C. utilizing a ramp time of 20-30 seconds. In yet another useful embodiment, induction annealing is completed at a temperature of about 140° C. utilizing a ramp time of 25-30 seconds.
- A first embodiment of a method of hydroforming a workpiece W is illustrated in
FIG. 3 a. In the illustrated embodiment, the workpiece W comprises an extruded aluminum tube but it should be appreciated that the workpiece may assume other forms or be made from other metals. The method includes bending of the workpiece W into a first preliminary shape (see step 14). This is followed by the induction annealing of the workpiece W in the manner previously described (see step 16). Theinduction annealing process 16 utilizes current to locally heat the workpiece W in order to alleviate excessive strain hardening within the workpiece thereby allowing for increased formability during later stages of the hydroforming method. - This is then followed by the pre-forming of the workpiece W into a second preliminary shape (note step 18). This is then followed by hydroforming the workpiece W to a desired final shape (note step 20). Subsequent to hydroforming, the workpiece W is subjected to trimming to a desired length (note step 22). Following trimming the workpiece W is subjected to a heat treatment in order to impart desired strength properties to the workpiece W (note step 24). In the illustrated embodiment the heat treatment is a T6 treatment at 180° C. for six hours in order to induce or impart an average yield strength of typically 290 MPa to the workpiece W. In alternative embodiments the heat treatment may be completed at temperatures between 160-200° C. for 4 to 10 hours.
- In an alternative embodiment of the production method illustrated in
FIG. 3 b, the production process includes bending 28 the workpiece W into a first preliminary shape. This is then followed by thepre-forming 30 of the workpiece W into a second preliminary shape. Next the workpiece W is subjected to theinduction annealing step 32 to recover formability. This is then followed by thehydroforming 34, trimming 36 and heat treating 38 steps previously described. - In yet another alternative embodiment illustrated in
FIG. 3 c, the production process includes bending 40 the workpiece W into a first preliminary shape. This is followed by theinduction annealing 42 of the workpiece W. Next the workpiece W is subjected to pre-forming 44 into a second preliminary shape. The workpiece W is then subjected to anotherincremental induction anneal 46. This is followed by hydroforming 48 the workpiece into a desired final shape. Subsequently, the workpiece is trimmed 50 and then subjected to artificial aging by means ofheat treatment 52. - Any of the production method embodiments illustrated in
FIGS. 3 a-3 c are particularly useful in the production of pickup truck roof rails which undergo significant bending of about 45° at the A-pillar portion P (seeFIG. 2 ) in order to support the transition of the workpiece W from the A-pillar into the hinge pillar. - The data presented in
FIGS. 4 and 5 shows that the induction annealing step orstage - In summary, numerous benefits result from the
method 10 of hydroforming of a workpiece W as disclosed herein. Advantageously the method supports high volume automotive manufacturing. Both structural and seamless tubes benefit from the method. In fact, structural tubes may now be readily used in the production of difficult-to-form A-pillar roof rails. Thus, the method allows for the use of a higher tolerance and more manufacturing efficient material for hydroforming roof rails. - As should be appreciated the induction annealing process is restricted to the heated region of interest only: that is, the area of bending where plastic strain capability has been reduced by the bending and/or pre-forming steps or stages 14, 18, 28, 30 of the production process. Heating of the tube is localized to the induction annealed region, therefore, there is no specialized equipment required for material handling of the workpiece W in the unheated regions. Further the induction annealing parameters required to restore formability to the workpiece W do not cause post-hydroformed material heat treatment response damage and the formed workpieces (in the illustrated embodiment, A-pillar roof rails), are still able to demonstrate the desired yield strengths.
- The foregoing has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Obvious modifications and variations are possible in light of the above teachings. For example, an incremental induction annealing step may be completed between both (a) the bending and pre-forming step and (b) the pre-forming and hydroforming steps if desired or at other times during production. All such modifications and variations are within the scope of the appended claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled.
Claims (20)
1. A method of hydroforming a workpiece, comprising:
bending said workpiece into a first preliminary shape;
pre-forming said workpiece into a second preliminary shape;
induction annealing said workpiece at a temperature between 120-160° C.; and
hydroforming said workpiece to a desired shape.
2. The method of claim 1 , including ramping to said induction annealing temperature in 10-30 seconds.
3. The method of claim 2 , including completing said induction annealing between the pre-forming and the hydroforming.
4. The method of claim 2 , including completing said induction annealing between the bending and the pre-forming.
5. The method of claim 2 , including trimming said workpiece to a desired length.
6. The method of claim 5 , including heat treating said workpiece after hydroforming in order to impart desired strength properties.
7. The method of claim 6 , including completing said heat treating at 160-200° C. for 4 to 10 hours.
8. The method of claim 7 , wherein said workpiece is made from AA6XXX aluminum alloy.
9. The method of claim 8 , wherein said workpiece is an A-pillar roof rail.
10. The method of claim 9 , including completing said induction annealing to said A-pillar roof rail at a first bend of an A-pillar portion of said workpiece.
11. The method of claim 10 , including completing said induction annealing at a temperature of between 130-150° C.
12. The method of claim 11 including ramping to said induction annealing temperature in 20 to 30 seconds.
13. The method of claim 10 , including completing said induction annealing at a temperature of 135-145° C.
14. The method of claim 13 including ramping to said induction annealing temperature in 20 to 30 seconds.
15. The method of claim 2 , including completing said induction annealing at a temperature of 140° C.
16. The method of claim 13 including ramping to said induction annealing temperature in 25 to 30 seconds.
17. The method of claim 16 , wherein said workpiece is made from AA6082-T4 aluminum alloy.
18. The method of claim 17 , including completing said induction annealing between both (a) the bending and pre-forming and (b) the pre-forming and hydroforming.
19. A method of hydroforming a workpiece, comprising:
pre-bending said workpiece into a first preliminary shape;
pre-forming said workpiece into a second preliminary shape;
induction annealing said workpiece at a temperature between 120-160° C. to improve formability of said workpiece while not compromising final strength properties of said workpiece;
hydroforming said workpiece to a desired shape; and
heat treating said workpiece at 160-200° C. for about 4 to 10 hours to increase final strength properties of said workpiece.
20. The method of claim 19 , including using an induction annealing temperature of about 140° C. with a ramp time of 20-30 seconds.
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US14/266,065 US20150315666A1 (en) | 2014-04-30 | 2014-04-30 | Induction annealing as a method for expanded hydroformed tube formability |
RU2016145425A RU2685318C2 (en) | 2014-04-30 | 2014-06-16 | Method of forming a vehicle beam |
PCT/US2014/042449 WO2015167588A1 (en) | 2014-04-30 | 2014-06-16 | Value stream process for forming vehicle rails from extruded aluminum tubes |
CN201480078630.9A CN106794503B (en) | 2014-04-30 | 2014-06-16 | For forming the monetary value flow process of vehicle rail by extrusion aluminum pipe |
DE112014006624.9T DE112014006624B4 (en) | 2014-04-30 | 2014-06-16 | PROCESS FOR FORMING AN ALUMINUM VEHICLE SIDE MEMBER |
GB1618102.6A GB2540306B (en) | 2014-04-30 | 2014-06-16 | Value stream process for forming vehicle rails from extruded aluminum tubes |
US14/428,051 US10086422B2 (en) | 2014-04-30 | 2014-06-16 | Value stream process for forming vehicle rails from extruded aluminum tubes |
DE102015207809.4A DE102015207809A1 (en) | 2014-04-30 | 2015-04-28 | Induction annealing as a process for expanded hydroformed tube formability |
CN201510213933.3A CN105033015A (en) | 2014-04-30 | 2015-04-29 | Induction annealing as a method for expanded hydroformed tube formability |
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US14/266,065 US20150315666A1 (en) | 2014-04-30 | 2014-04-30 | Induction annealing as a method for expanded hydroformed tube formability |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150352626A1 (en) * | 2014-06-10 | 2015-12-10 | Ford Global Technologies, Llc | Method of hydroforming an extruded aluminum tube with a flat nose corner radius |
US10086422B2 (en) | 2014-04-30 | 2018-10-02 | Ford Global Technologies, Llc | Value stream process for forming vehicle rails from extruded aluminum tubes |
CN110614481A (en) * | 2019-08-02 | 2019-12-27 | 台州磊达型钢冷拔有限公司 | Machining process of guide rail |
US10570489B2 (en) | 2017-02-15 | 2020-02-25 | Ford Global Technologies, Llc | Heat treatment and tube forming process for high strength aluminum tube body structure reinforcements |
WO2020049021A1 (en) | 2018-09-05 | 2020-03-12 | Aleris Rolled Products Germany Gmbh | Method of producing a high-energy hydroformed structure from a 2xxx-series alloy |
WO2020200869A1 (en) * | 2019-04-03 | 2020-10-08 | Aleris Rolled Products Germany Gmbh | Method of producing a high-energy hydroformed structure from a 2xxx-series alloy |
US20210402859A1 (en) * | 2020-06-29 | 2021-12-30 | Ford Global Technologies, Llc | Adjustable glass track systems for vehicles with frameless doors |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105568140B (en) * | 2016-03-02 | 2017-10-17 | 江苏九龙汽车制造有限公司 | A kind of torsion beam preparation method |
US20170268086A1 (en) * | 2016-03-17 | 2017-09-21 | Ford Global Technologies, Llc | Recovery heat treatment of highly strained components |
US11389851B2 (en) * | 2016-07-11 | 2022-07-19 | Hydro Extruded Solutions As | Hot metal gas formed roof rail and method of manufacture thereof |
DE102018008302A1 (en) * | 2018-10-17 | 2020-04-23 | Technische Universität Dortmund | Method and device for forming, in particular for profiling and bending, thin-walled profiles |
US20220371071A1 (en) | 2021-05-18 | 2022-11-24 | Ford Global Technologies, Llc | Value stream process for roll forming and bobbin tool friction stir welding aluminum sheet to form vehicle structural rails |
Family Cites Families (100)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962077A (en) | 1958-11-18 | 1960-11-29 | Boeing Co | Pipe bending mandrel |
US3456482A (en) | 1966-10-03 | 1969-07-22 | Teledyne Inc | Method and apparatus for draw forming tubes and the like including mandrels therefor |
US4713063A (en) * | 1985-04-29 | 1987-12-15 | Beta Phase, Inc. | Intravenous tube and controller therefor |
US4766664A (en) * | 1987-02-17 | 1988-08-30 | Alumax Extrusions, Inc. | Process for formation of high strength aluminum ladder structures |
SU1523226A1 (en) | 1987-04-08 | 1989-11-23 | Московский авиационно-технологический институт им.К.Э.Циолковского | Method of producing thin-walled sharply-bent branch pipes |
USRE33990E (en) | 1987-05-06 | 1992-07-14 | Ti Corporate Services Limited | Method of forming box-like frame members |
US5890387A (en) | 1989-08-24 | 1999-04-06 | Aquaform Inc. | Apparatus and method for forming and hydropiercing a tubular frame member |
US5070717A (en) | 1991-01-22 | 1991-12-10 | General Motors Corporation | Method of forming a tubular member with flange |
DE4103082A1 (en) | 1991-02-01 | 1992-08-27 | Eichelberg & Co Gmbh H D | METHOD FOR THE HYDROSTATIC FORMING OF HOLLOW BODIES FROM COLD FORMABLE METAL AND DEVICE FOR IMPLEMENTING THE METHOD |
US5339667A (en) | 1993-04-19 | 1994-08-23 | General Motors Corporation | Method for pinch free tube forming |
DE4322711C2 (en) * | 1993-07-08 | 1995-06-08 | Rofo Rohrbogen Und Formstuecke | Method of making a pipe bend |
KR100374104B1 (en) | 1994-09-06 | 2003-04-18 | 알칸 인터내셔널 리미티드 | Heat treatment process for aluminum alloy sheet |
US20020066254A1 (en) * | 1995-09-04 | 2002-06-06 | Alfred Ebbinghaus | Reinforced formed part, process for its production and its use |
US5557961A (en) * | 1995-11-13 | 1996-09-24 | General Motors Corporation | Hydroformed structural member with varied wall thickness |
DE19882390B4 (en) | 1997-05-12 | 2010-02-18 | Dana Automotive Systems Group, LLC, Toledo | Hydroforming |
US6237382B1 (en) | 1997-08-06 | 2001-05-29 | Sumitomo Metal Industries, Ltd. | Method and apparatus for hydroforming metallic tube |
US6176544B1 (en) * | 1997-12-19 | 2001-01-23 | Alcoa Inc. | Instrument panel reinforcement structure including a novel driver side cross tube |
US5931520A (en) * | 1997-12-19 | 1999-08-03 | Aluminum Company Of America | Light weight instrument panel reinforcement structure |
DE19803275A1 (en) * | 1998-01-29 | 1999-08-12 | Benteler Werke Ag | Exhaust manifold |
GB9817112D0 (en) | 1998-08-07 | 1998-10-07 | Gkn Sankey Ltd | A process for forming tubular components |
US6065502A (en) | 1998-10-07 | 2000-05-23 | Cosma International Inc. | Method and apparatus for wrinkle-free hydroforming of angled tubular parts |
WO2000029164A1 (en) * | 1998-11-13 | 2000-05-25 | Elpatronic Ag | Method and device for positioning edges, especially in tube welding |
JP2000301251A (en) | 1998-12-31 | 2000-10-31 | Dana Corp | Production of front wheel axle beam by hydroforming |
US6032501A (en) | 1999-02-09 | 2000-03-07 | The Budd Company | Method of hydroforming multi-lateral members from round tubes |
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 |
JP4044706B2 (en) | 1999-06-28 | 2008-02-06 | 新日本製鐵株式会社 | Hydroform processing method |
DE19946011A1 (en) * | 1999-08-05 | 2001-02-08 | Alusuisse Tech & Man Ag | Process for reshaping an initial profile or the like workpiece by means of internal high pressure, and profile therefor |
DE19940364A1 (en) * | 1999-08-25 | 2001-04-19 | Trw Fahrwerksyst Gmbh & Co | Axle system for articulated assembly of vehicle axles in motor vehicles has axle strut body and articulation body each made from one-piece closed hollow profiled section |
AU7637400A (en) | 1999-10-15 | 2001-04-30 | Cosma International Inc. | Improved method for hydroforming an aluminum tubular blank |
CA2387861A1 (en) * | 1999-10-22 | 2001-05-03 | Elpatronic Ag | Method and device for the formation of pipes |
DE19955694A1 (en) | 1999-11-18 | 2001-05-23 | Alusuisse Tech & Man Ag | Process for forming an initial profile or the like workpiece and profile therefor |
DE19959598A1 (en) * | 1999-12-10 | 2001-06-13 | Rolls Royce Deutschland | Method for manufacturing a blade of a turbomachine |
US6257035B1 (en) | 1999-12-15 | 2001-07-10 | Ti Corporate Services Limited | Compressive hydroforming |
IT1320503B1 (en) | 2000-06-16 | 2003-12-10 | Iveco Fiat | PROCEDURE FOR THE PRODUCTION OF AXLES FOR INDUSTRIAL VEHICLES. |
WO2002004166A1 (en) * | 2000-07-12 | 2002-01-17 | Mannesmannröhren-Werke Ag | Method for producing metallic, non-rotationally symmetrical rings with a constant wall thickness over their circumference |
US6508035B1 (en) | 2000-07-25 | 2003-01-21 | Alcoa Inc. | Ultra-lightweight thin sliding door for a vehicle |
US6471285B1 (en) | 2000-09-29 | 2002-10-29 | L&L Products, Inc. | Hydroform structural reinforcement system |
DE10115696A1 (en) * | 2001-03-29 | 2002-10-10 | Henkel Kgaa | Lubricant mixture and its use |
DE10150092C1 (en) * | 2001-10-11 | 2003-04-03 | Salzgitter Antriebstechnik Gmb | Process for charging inner high pressure deforming presses with several parts comprises inserting all parts of the workpiece into the lower part of an assembly device, and controlling the position of the parts in the lower part |
JP2003126923A (en) | 2001-10-24 | 2003-05-08 | Honda Motor Co Ltd | Method of forming tubular member |
JP3794680B2 (en) * | 2001-11-19 | 2006-07-05 | 本田技研工業株式会社 | Hydroforming method |
DE10213194A1 (en) * | 2002-03-25 | 2003-10-16 | Behr Gmbh & Co | Soldered refrigerant condenser |
US6732434B2 (en) * | 2002-04-15 | 2004-05-11 | General Motors Corporation | Process for forming aluminum hydroforms |
DE10230284B4 (en) * | 2002-07-05 | 2008-10-16 | Daimler Ag | Method and device for attaching components to circumferentially closed hollow sections |
KR100981355B1 (en) * | 2002-10-11 | 2010-09-10 | 우수이 고쿠사이 산교 가부시키가이샤 | Fuel delivery pipe |
CA2417248A1 (en) | 2003-01-17 | 2004-07-17 | Robert Walther | Method of manufacturing a fuel filler tube |
US20040163743A1 (en) * | 2003-02-21 | 2004-08-26 | Dickson John A. | Methods of forming a splined shaft |
DE10312028B4 (en) | 2003-03-18 | 2005-07-28 | Tower Automotive Hydroforming Gmbh & Co. Kg | Process for the production of components |
US7194883B2 (en) * | 2003-04-09 | 2007-03-27 | Sapa Profiler Ab | Method for forming of tubular work-pieces using a segmented tool |
DE10329719A1 (en) * | 2003-07-02 | 2005-01-20 | Daimlerchrysler Ag | Elbows |
KR100552614B1 (en) * | 2003-07-22 | 2006-02-15 | 주식회사 성우하이텍 | Method for manufacturing member assembly of body |
US7204114B2 (en) | 2003-08-28 | 2007-04-17 | General Motors Corporation | Method of progressive hydro-forming of tubular members |
DE10350154B3 (en) * | 2003-10-28 | 2005-04-07 | Daimlerchrysler Ag | Process for simultaneously producing separated workpieces by inner high pressure or hydro deformation comprises exposing cutting edges during deformation, and passing a blank into a gap between the cutting edges during deformation |
KR100604634B1 (en) * | 2004-08-09 | 2006-07-28 | 주식회사 성우하이텍 | Method for manufacturing member assembly of body |
US7096700B2 (en) | 2004-09-28 | 2006-08-29 | Dana Corporation | Method for performing a hydroforming operation |
CA2522109A1 (en) * | 2004-10-01 | 2006-04-01 | Stefano Lepre | Vehicle structural components made from tubular members and method therefor |
US7491278B2 (en) | 2004-10-05 | 2009-02-17 | Aleris Aluminum Koblenz Gmbh | Method of heat treating an aluminium alloy member and apparatus therefor |
US8459077B2 (en) | 2005-02-15 | 2013-06-11 | Nsk Ltd. | Manufacturing method for metal member with through hole |
CN101238311A (en) * | 2005-08-04 | 2008-08-06 | 诺伊曼尔·泰克福尔控股有限公司 | Transmission, in particular for a motor vehicle, and shaft or shafts for said transmission, and method for producing shafts of said type |
DE102005049050B4 (en) * | 2005-10-13 | 2010-12-23 | Saf-Holland Gmbh | Method for producing an axle component |
KR20080000689A (en) * | 2006-06-28 | 2008-01-03 | 현대자동차주식회사 | Method for heat treatment al cylinder head |
CA2684299C (en) * | 2007-04-18 | 2013-04-16 | Nippon Steel Corporation | Hydroforming method |
CN101754821B (en) | 2007-07-20 | 2012-04-18 | 新日本制铁株式会社 | Method for hydroforming |
DE102007034353A1 (en) * | 2007-07-24 | 2009-01-29 | Evonik Goldschmidt Gmbh | Use of ionic liquids for chipless forming of metallic workpieces |
JP5038819B2 (en) * | 2007-08-22 | 2012-10-03 | 有限会社東和工業 | Bending method for flared tube |
DE102008007556A1 (en) | 2008-02-05 | 2009-08-06 | Daimler Ag | Hybrid component for a motor vehicle |
KR101069023B1 (en) | 2008-06-30 | 2011-09-29 | 현대하이스코 주식회사 | Hydroforming process for reinforcing front axle |
DE102008037726A1 (en) * | 2008-08-14 | 2010-05-06 | Khs Ag | Method and device for heat treatment of liquid foods |
WO2010035883A1 (en) | 2008-09-25 | 2010-04-01 | Jfeスチール株式会社 | Method for forming deformed cross-section and formed article of quadrilateral cross-section exhibiting excellent spot weldability |
AT507490B1 (en) | 2008-10-17 | 2011-04-15 | Lkr Leichtmetallkompetenzzentrum Ranshofen Gmbh | ALUMINUM ALLOY, PROCESS FOR THEIR PRODUCTION AND THEIR USE |
JP5237128B2 (en) * | 2009-01-09 | 2013-07-17 | 株式会社神戸製鋼所 | Aluminum alloy bumper system manufacturing method and aluminum alloy bumper system |
US8171769B2 (en) | 2009-01-27 | 2012-05-08 | Ford Global Technologies | Method of forming a flanged tubular member in hydroforming |
US9302307B2 (en) | 2009-02-16 | 2016-04-05 | Vari-Form, Inc. | Method of forming hollow body with flange |
ATE505276T1 (en) * | 2009-02-20 | 2011-04-15 | Theodor Graebener Gmbh & Co Kg | DEVICE FOR PRODUCING MOLDED PARTS |
JP2010196089A (en) * | 2009-02-24 | 2010-09-09 | Kobe Steel Ltd | Extruded pipe of aluminum alloy having high strength and superior stress corrosion cracking resistance for hydroforming process |
US8163113B2 (en) | 2009-03-31 | 2012-04-24 | GM Global Technology Operations LLC | Thermomechanical processing of aluminum alloys |
DE102009041919A1 (en) * | 2009-09-17 | 2011-03-31 | Tyco Electronics Amp Gmbh | Electrical contact element for high current connectors and manufacturing processes |
CN102049656B (en) * | 2009-10-27 | 2012-08-15 | 财团法人金属工业研究发展中心 | Method for molding U-shaped metal pipe frame |
JPWO2011099592A1 (en) | 2010-02-09 | 2013-06-17 | 新日鐵住金株式会社 | Hydroform processing method and hydroform processing apparatus |
US20110241385A1 (en) | 2010-03-30 | 2011-10-06 | Ford Global Technologies Llc | Vehicle Frame with Direction-Specific Deformation |
US8668249B2 (en) | 2010-12-22 | 2014-03-11 | Caterpillar Inc. | Frame for a cab of a mobile machine |
CH705186A2 (en) * | 2011-06-17 | 2012-12-31 | Joulia Ag | Shower tray with a heat exchanger and method for producing a shower tray. |
TR201202067A2 (en) | 2012-02-23 | 2012-12-21 | Coşkunöz Metal Form Maki̇na Endüstri̇ Ve Ti̇c. A.Ş. | A method for producing a bent hollow tubular vehicle component. |
DE102012020882B4 (en) * | 2012-10-24 | 2014-08-28 | Audi Ag | Method for producing a heat exchanger for a motor vehicle and heat exchanger for a motor vehicle |
EP2917594B1 (en) * | 2012-11-08 | 2018-08-01 | Dana Automotive Systems Group, LLC | Hydroformed driveshaft tube with secondary shape |
US8978432B2 (en) * | 2013-02-12 | 2015-03-17 | Caterpillar Inc. | Multi-stage tube hydroforming process |
US8826712B1 (en) * | 2013-03-15 | 2014-09-09 | Ford Global Technologies, Llc | Pressure sequence process for hydro-forming an extruded structural tube |
DE102013205184B3 (en) * | 2013-03-25 | 2014-06-12 | Aktiebolaget Skf | Cross member, useful in universal joint of propeller shaft of e.g. passenger car, comprises base body, from which four pins extend, where each pin has cylindrical section having diameter and length in axial direction of pin |
WO2014187614A1 (en) * | 2013-05-22 | 2014-11-27 | Bayerische Motoren Werke Aktiengesellschaft | Axle support of a vehicle |
DE102013105922A1 (en) * | 2013-06-07 | 2014-12-11 | Endress + Hauser Flowtec Ag | Ultrasonic flowmeter |
DE102015000069B4 (en) * | 2014-01-23 | 2023-06-15 | Mann+Hummel Gmbh | Replacement filter of a filter device and filter device |
DE102014004329A1 (en) * | 2014-03-26 | 2015-10-01 | Ulrich Bruhnke | Method and device for processing extruded sections of magnesium or magnesium alloys and a lightweight component made therefrom |
US20150315666A1 (en) | 2014-04-30 | 2015-11-05 | Ford Global Technologies, Llc | Induction annealing as a method for expanded hydroformed tube formability |
US9079617B1 (en) * | 2014-05-29 | 2015-07-14 | Ford Global Technologies, Llc | Vehicle front end joint |
US9533343B2 (en) * | 2014-06-12 | 2017-01-03 | Ford Global Technologies, Llc | Aluminum porthole extruded tubing with locating feature |
DE102014216070A1 (en) * | 2014-08-13 | 2016-02-18 | Boge Elastmetall Gmbh | Aggregate bearing, in particular for a motor vehicle |
DE102014113408A1 (en) * | 2014-09-17 | 2016-03-17 | Endress + Hauser Flowtec Ag | Method for producing a magneto-inductive flowmeter with a partially reduced cross-section |
DE102014118187A1 (en) * | 2014-12-09 | 2016-06-09 | Endress + Hauser Flowtec Ag | Ultrasonic flowmeter |
DE102015101004B4 (en) * | 2015-01-23 | 2017-05-18 | Linamar Gmbh | Method for joining a function module and function module |
JP6269613B2 (en) * | 2015-08-05 | 2018-01-31 | トヨタ自動車株式会社 | Body frame structure and manufacturing method thereof |
-
2014
- 2014-04-30 US US14/266,065 patent/US20150315666A1/en not_active Abandoned
- 2014-06-16 US US14/428,051 patent/US10086422B2/en active Active
-
2015
- 2015-04-28 DE DE102015207809.4A patent/DE102015207809A1/en not_active Withdrawn
- 2015-04-29 CN CN201510213933.3A patent/CN105033015A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10086422B2 (en) | 2014-04-30 | 2018-10-02 | Ford Global Technologies, Llc | Value stream process for forming vehicle rails from extruded aluminum tubes |
US20150352626A1 (en) * | 2014-06-10 | 2015-12-10 | Ford Global Technologies, Llc | Method of hydroforming an extruded aluminum tube with a flat nose corner radius |
US9545657B2 (en) * | 2014-06-10 | 2017-01-17 | Ford Global Technologies, Llc | Method of hydroforming an extruded aluminum tube with a flat nose corner radius |
US10570489B2 (en) | 2017-02-15 | 2020-02-25 | Ford Global Technologies, Llc | Heat treatment and tube forming process for high strength aluminum tube body structure reinforcements |
WO2020049021A1 (en) | 2018-09-05 | 2020-03-12 | Aleris Rolled Products Germany Gmbh | Method of producing a high-energy hydroformed structure from a 2xxx-series alloy |
CN112839749A (en) * | 2018-09-05 | 2021-05-25 | 空中客车简化股份公司 | Method of producing high energy hydroformed structures from 2xxx series alloys |
WO2020200869A1 (en) * | 2019-04-03 | 2020-10-08 | Aleris Rolled Products Germany Gmbh | Method of producing a high-energy hydroformed structure from a 2xxx-series alloy |
CN110614481A (en) * | 2019-08-02 | 2019-12-27 | 台州磊达型钢冷拔有限公司 | Machining process of guide rail |
US20210402859A1 (en) * | 2020-06-29 | 2021-12-30 | Ford Global Technologies, Llc | Adjustable glass track systems for vehicles with frameless doors |
US11485209B2 (en) * | 2020-06-29 | 2022-11-01 | Ford Global Technologies, Llc | Adjustable glass track systems for vehicles with frameless doors |
Also Published As
Publication number | Publication date |
---|---|
US10086422B2 (en) | 2018-10-02 |
CN105033015A (en) | 2015-11-11 |
DE102015207809A1 (en) | 2015-11-05 |
US20160001345A1 (en) | 2016-01-07 |
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