CN101505888A - Method and apparatus for hot forming elongated metallic bars - Google Patents
Method and apparatus for hot forming elongated metallic bars Download PDFInfo
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- CN101505888A CN101505888A CNA200780016841XA CN200780016841A CN101505888A CN 101505888 A CN101505888 A CN 101505888A CN A200780016841X A CNA200780016841X A CN A200780016841XA CN 200780016841 A CN200780016841 A CN 200780016841A CN 101505888 A CN101505888 A CN 101505888A
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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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/02—Bending by stretching or pulling over a die
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Extrusion Of Metal (AREA)
- Resistance Heating (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Metal Extraction Processes (AREA)
Abstract
A hot stretch wrap forming apparatus includes a die having a work surface formed of a thermally and/or electrically insulative material, and a set of spaced jaws for stretching and wrapping the metal form around the work surface. A preferred insulative material is a flexible blanket of woven ceramic fibers. A heat source is used to heat the metal form prior to stretching and wrapping. The metal form is preferably heated resistively to maintain a uniform temperature throughout the metal form. The die is typically formed primarily of metal and thus the insulative material thermally insulates the metal form from the metal of the die to prevent the formation of hot spots which would otherwise occur therebetween. The insulative material also electrically insulates the metal form from the metal of the die to prevent shunting therebetween.
Description
Background of invention
1. technical field
The present invention relates to the hot-stretch winding shaping (hot stretch-wrap forming) of metal parts, especially elongated metal bar.More particularly, the present invention relates to be difficult to usually the hot-stretch winding shaping of titanium, titanium alloy and metalloid that stretching and winding is shaped.Especially, the present invention relates to utilize mould to come shape (metalform) is carried out the hot-stretch winding shaping with heat insulation and electric insulation working surface.
2. background technology
The parts of making by titanium alloy that the hot-stretch winding shaping of the elongated metal parts that the present invention relates at high temperature be shaped, described metal parts are especially made by the combination of extruding, forging, rolling, machined or these methods.Titanium alloy is extensive use of as aerospace material because their fabulous machinery and decay resistance and weight are light.Yet well-known, titanium alloy generally is difficult to be shaped, and need be heated to very high-temperature so that be shaped these parts suitably.Titanium alloy is very good for using in the molding structure spare (contoured structural members) of airborne vehicle, but owing to lack suitable and economically feasible method in order to these molding structure spares that are shaped, the shaping of these structural members is very restricted.Along with increase, to the increase in demand of these parts to the needs of in light weight and structure member that intensity is high such as the wing chord (chords) in the advanced aircraft.
A kind of method of microscler titanium part of can be used at present being shaped is commonly referred to as " impact forging method (bump forming) ".This method comprises elongated member is placed on and is heated to predetermined temperature in the stove, when reaching predetermined temperature parts is taken out from stove and is placed on the shaping unit of forming press.Forming press applies bending force to cause the local deformation of parts.Temperature at the shaping parts descends fast, thereby the resistance that is shaped significantly increases.Therefore, the impact forging method requires the heating cycle of repetition, so that finish forming process, expends time in like this and fund.In addition, cause at this section parts on the neutral axis by the bending moment that impact forging produced to produce tensile stress and under natural axis, to produce compression stress that above-mentioned tensile stress and compression stress cause respectively cracking and wrinkle in parts.Sizable stress gradient in parts makes the geometry of the parts be difficult to control formed thereby.In addition, promoted the wherein generation of abundant residues stress by the caused local deformation of combined stress state of parts, and this requirement is carried out the off-line stress relief treatment with the high anchor clamps of price.The impact forging method also is subjected to lacking the restriction that can not rely on trial-and-error method and obtain this shortcoming of steering tool of desirable profile.It for example also is difficult to keep along the structural integrity in the cross section of the angle between flange and the analog.The size globality that back hot size (post hot sizing) improves molded component has been proposed.At last, the impact forging method is not suitable for computer simulation.
Although the overall conception of hot-stretch winding shaping came out a period of time already, the parts that the known systems method is not suitable for being shaped economically and makes with the titanium alloy that is difficult to be shaped or other material.Authorize the United States Patent (USP) 2 of Maloney, 952,767 disclose a kind of be shaped equipment of microscler bar of stretching and winding that is used for, and described microscler bar heats by resistance heated, and around the metal die coiling, above-mentioned metal die heats by the conventional heating element heater in the die assembly.With the subject matter of this configuration is when heated mold and metal parts are in contact with one another, and produces electric shunt effect (electrical shunting effect) between them, and this effect causes the hot-spot and the necking down of parts.
Authorize people's such as Morries United States Patent (USP) 4,011,429 notice above-mentioned shunt effect, and manage by being electrically connected mould and metal parts in parallel, be heated by resistive mould and microscler metal parts the two and heat them with identical voltage and overcome this problem.Regrettably, this configuration is impracticable, the mold arrangement of selling at exorbitant prices because the parallel connection of mould and parts adds the heat request complexity.In addition, this method requires parts are preheating to uniform temperature, this temperature significantly is lower than the forming temperature of parts, and simultaneously with mold heated to forming temperature, therefore, have only the contact portion of parts when contacting to be elevated to forming temperature, cause between the contact portion of parts and non-contact portion, producing uneven yield strength like this with mould.Because deformation process is inhomogeneous, be extremely difficult so will keep the structural integrity of parts of formed thereby and the generation that reduces residual stress.
The present invention solves these and other problem, as by following explanation will manifesting.
Summary of the invention
The invention provides a kind of equipment, comprising: mould, described mould has a working surface, this working surface by heat insulator and electrically insulating material one of them forms at least; Wherein working surface is suitable for during the hot-stretch winding shaping of shape around this working surface coiling shape; One group of first and second isolated chuck, described chuck is suitable for clamping shape; Wherein each chuck is removable and away from each other, thereby chuck is suitable for applying tensile force to shape; And wherein at least one in chuck group and the mould can be with respect in chuck group and the mould another form and reel and move between the form of back before coiling, thereby the relative motion between chuck group and the mould is suitable for the working surface coiling shape around mould.
The present invention also provides a kind of method, may further comprise the steps: the heating of metal section bar; Apply tensile force to shape; With around working surface coiling shape, above-mentioned working surface is with one of them formation at least of heat insulator and electrically insulating material.
Brief description
Fig. 1 is the schematic top plane of hot-stretch winding shaping equipment of the present invention, wherein is illustrated in heat insulation and electrically insulating material and metal bar in the die cavity before reeling around mould.
Fig. 2 is the cutaway view that the line 2-2 along Fig. 1 is got, two layers of insulation material in the die cavity shown in it.
Fig. 3 is the cutaway view that is similar to Fig. 2, and metal bar shown in it inserts in the die cavity with insulating materials that mould and metal bar are separated.
Fig. 4 is similar to Fig. 1, and chuck shown in it moves to the completing place of Fig. 4 so that center on the microscler bar of working surface coiling of mould from the starting position of Fig. 1.
Fig. 5 is one of them a diagrammatic side view of chuck of the present invention.
Fig. 6 is similar to Fig. 3, monolayer insulating layer shown in it rather than double hyer insulation layer.
Fig. 7 is similar to Fig. 6, has the shape (metalform) and the die cavity of different configurations shown in it.
In each accompanying drawing, same label refers to same parts.
Detailed description of the invention
Hot-stretch winding shaping equipment of the present invention is generally represented with label 10 in Fig. 1.Equipment 10 comprises mould 12 and a pair of isolated chuck 14, described chuck 14 is provided for clamping a shape, the described shape that illustrates is microscler metal bar 16, the respective end of above-mentioned chuck 14 contiguous bars 16 clamps, and the described metal bar 16 that stretches when heating with box lunch is also around mould 12 coiling bars 16.10 pairs of equipment are particularly useful with the hot-stretch winding shaping of the bar that titanium alloy is made.Chuck 14 is attached in the corresponding swing arm, and described swing arm is not shown, but is known in this technical field.Each chuck 14 all passes through lead or electric wire 20 is communicated with power supply 18, so that form the circuit with resistance mode heating of metal bar 16.The exemplary embodiment of equipment 10 illustrates mould 12 by electric wire 22 and power supply 18 electric connections, so that form circuit, if necessary, mould 12 can be heated with resistance mode by this circuit.In addition, can randomly a plurality of heating element heaters 24 be inserted in the mould 12, be used for described mold heated.Mould 12 comprises main body, and described main body has die surface or die cavity border surface 26, and described die cavity border surface 26 limits T shape die cavity 28 (Fig. 2).Surface 26 and die cavity 28 have arcuate configuration, and described arcuate configuration extends to second end 32 of mould 12 from first end 30 of mould 12.
First or inner insulating layer 34 and second or external insulation layer 36 as the die surface cover layer, described die surface cover layer can be arranged between die surface 26 and the metal bar 16 during the hot-stretch winding shaping process.First and second layer 34 and 36 that illustrates is arranged in the die cavity 28, simultaneously ground floor 34 in continuous basically mode from surface 26 that first end, 30 to second ends 32 of mould 12 are pasting mould 12.The second layer 36 is pasting ground floor 34 in continuous basically mode from first end, 30 to second ends 32 equally.Comply with the surface 26 of mould 12 for first and second layer 34 and 36, and therefore form T shape structure.The second layer 36 limits a working surface 38, and described working surface 38 is pasting metal bar 16 during winding process.
As shown in Figure 2, metal bar 16 has a T shape cross section, and described T shape cross section has the structure with T shape die cavity 28 and working surface 38 couplings.Working surface 38 limits a T shape working space 40, and bar 16 is arranged on during the stretching and winding process in the above-mentioned working space 40.
More particularly, the preferred material of heat insulation and electric insulation that adopts of each layer among first and second layer 34 and 36 forms.Alternatively, if desired, first and second layer 34 and 36 one of them can make with heat insulator, and another the layer can make with electrically insulating material.Although preferably between mould 12 and bar 16, provide heat insulation and electric insulation layer, it is contemplated that, decide on environment, can be only with one deck thermal insulation layer or only use one deck electric insulation layer.
The configuration of each fixture block 14 is described with reference to Fig. 5.Fixture block 14 comprises: the first and second isolated arms 42 and 44; First and second insulating parts 46 and 48, they are connected respectively on above-mentioned arm 42 and 44, and are arranged between arm 42 and 44; And first and second clamping elements 50 and 52, described first and second clamping elements 50 and 52 are connected respectively on insulating part 46 and 48, and are arranged between them.Therefore, first insulating part 46 prevents the electric connection between the first arm 42 and first clamping element 50, and second insulating part 48 prevents electric connection between second arm 44 and second clamping element 52 equally.When clamping bar 16, first clamping element 50 and electric wire 20 and metal bar 16 electric connections, therefore first clamping element 50 is parts of the circuit of the above-mentioned resistance-type heating that is used to provide metal bar 16.The scheme of being electrically connected shown in Fig. 5 is presented for purposes of illustration, do not get rid of electric wire 20 and second clamping element 52 or with two clamping elements 50 and 52 be connected.
In exemplary embodiment, first and second layer 34 and 36 usefulness flexible refractory material form.This makes first and second layer 34 and 36 shape that can comply with die cavity at an easy rate.In addition, use this flexible layers can be provided at the versatility that winding process is provided with each layer before.For example, before metal bar inserts die cavity, each layer can be arranged on (as shown in Figure 5) in the die cavity part or all metal bar of reeling, perhaps be suspended at simply between die cavity and the metal bar, insulating materials be pressed into desirable shape so that metal bar is inserted in the die cavity.First and second layer 34 and 36 refractory ceramic blankets (blanket) normally.A kind of such suitable ceramic superficial layer adopts trade name Kaowool to sell.This ceramic blankets provides aforesaid heat insulation and electrical insulation capability usually, and makes with the ceramic fabric or the fiber of braiding.These flexible surface's layers when retrogressive metamorphism when dying on to a certain degree so that to purpose of the present invention, also be easy to from die cavity or metal bar takes out.
Although this ceramic blankets is a kind of form of desirable insulating materials, also can utilize other suitable material, described suitable material provides heat and/or electrical insulation capability required for the present invention, and can bear heat used during winding process and pressure.
The operation of equipment 10 is illustrated with reference to Fig. 1-4.Referring to Fig. 1, handle power supply 18, so that make electric current flow through metal bar 16, metal bar 16 is heated to predetermined temperature with resistance mode.In case reach this temperature, chuck 14 just applies the power just like the outside stretching shown in the arrow A, that is to say longitudinal pulling force or tension force.Therebetween, decide on environment, mould 12 can heat or can not heat.If mould 12 needs heating, then can handle power supply 18 so that by electric wire 22 with resistance mode heating mould 12 and/or heating element heater 24 heating can be come heating mould 12.No matter whether mould 12 heats, and then chuck 14 is moved towards mould 12 directions, so that metal bar 16 is moved in the working space 40, shown in arrow B in Fig. 3 and 4.Alternatively or as combination, can move moulds 12 so that help relative motion between mould 12 and the chuck 14.Mobile chuck 14 shown in arrow C among Fig. 4 so that force metal bar 16 to head on the working surface 38 of layer 36, makes metal bar 16 reel around mould 12, so that form the arcuate configuration of shaped portion as shown in Figure 4 then.During reeling, mould 12 is continuously applied longitudinal stretching power at metal bar 16 to metal bar 16.Therefore, chuck 14 form before the coiling of equipment shown in Figure 1 10 moves to form behind the coiling shown in Figure 4.
The electrical insulation capability of layer 34 and/or 36 prevents the electricity shunting between metal bar 16 and the mould 12, and described electricity shunting illustrates in background parts of the present invention.In addition, layer 34 and/or 36 thermal insulation properties reduces or eliminates the heat spot of metal bar 16 as far as possible, if described heat spot may caused when it is heated and during especially inhomogeneous heating by mould 12 under the situation of the thermal insulation properties that does not have layer 34 and/or 36.Thermal insulation properties also can allow not heating mould 12 or heating mould 12 uses mould 12 under the significantly reduced level constructing than known prior art.
Therefore, equipment 10 provides a kind of structure, describedly is configured to resistance-type heating of metal bar 16, divides flow problem or heat spot and can not produce during operating winding.This is very favourable, because the heating of the resistance-type of metal bar 16 is provided for evenly heating on whole metal bar.Preferably, metal bar 16 is heated to a specific range of temperatures, under lower strain rate, stretch, and in whole process, all remain in this temperature range, and behind winding process, be incubated a period of time, so that metal bar is shaped with its final form, in the parts of formed thereby, does not have resilience basically or do not have undesirable tensile stress or compression stress basically simultaneously.If desired, between soak, can continue longitudinal stretching.Preferably, even mould 12 does not heat separately or is heated to the temperature that significantly is lower than bar 16 forming temperatures, in whole stretching and winding process and the uniform temperature that all keeps bar 16 between any soak.Insulating barrier 34 and/or helped to keep the ability of this uniform temperature in 360 minutes is because correspondingly reduced the heat loss of bar 16 and prevented above-mentioned heat spot.Be described in more detail equipment and methods aspect preferred more of the present invention in the patent application of awaiting the reply jointly that is entitled as " creep forming and the method and apparatus that eliminates stress in elongated metal bar ", above-mentioned application and the application submit simultaneously and are included in herein as a reference.
Fig. 6 illustrates alternative embodiment, wherein only with a layer insulating 34, has eliminated one deck 36 like this.As mentioned above, layer 34 can decide to have heat and/or electrical insulation capability on concrete environment, and the two has both but wish heat and electrical insulation capability usually.
Fig. 7 illustrates alternative mould 54, and described mould 54 limits the U-shaped die cavity for using with cardinal principle U-shaped metal bar 56.First and second layer 58 and 60 usefulness are used with layer 34 and 36 similar modes, and comply with the U-shaped structure of the die cavity of mould 54.Therefore Fig. 7 represents that this method can be used to have the metal bar of various different transverse shapes.Other shape can have towards outer groove, as the U-shaped structure of putting upside down with respect to bar 56.These grooves are filled with microscler flexure member, so that keep appropriate structures at the hot-stretch shaping, for example are used to prevent that the leg of inverted U-shaped bar is out of shape toward each other.
In the above description, for easy, clear and be convenient to understand for the purpose of, used some terms.These terms are not to mean to add the unnecessary restriction that some exceed the scope of prior art requirement.Because these terms are to be used for illustrative purposes, and should do extensive interpretation.
In addition, explanation of the present invention and diagram are exemplary, the invention is not restricted to some details shown or explanation.
Claims (20)
1. equipment comprises:
Mould, described mould has a working surface, this working surface by heat insulator and electrically insulating material one of them forms at least; Wherein working surface is suitable for during the hot-stretch winding shaping of shape around this working surface coiling shape;
One group of first and second isolated chuck, described chuck is suitable for clamping shape;
Wherein each chuck is removable and away from each other, thereby chuck is suitable for applying tensile force to shape; And
Wherein at least one in chuck group and the mould can be with respect in chuck group and the mould another form and reel and move between the form of back before coiling, thereby the relative motion between chuck group and the mould is suitable for the working surface coiling shape around mould.
2. equipment as claimed in claim 1, wherein working surface is formed by heat insulation and electrically insulating material.
3. equipment as claimed in claim 1, wherein insulating materials comprises ceramic material.
4. equipment as claimed in claim 1, wherein insulating materials comprises flexible surface's layer of fibrous refractory material.
5. equipment as claimed in claim 1, wherein mould comprises main body, and described main body has die surface and cover layer, and described cover layer comprises described working surface; And wherein cover layer can be close to the die surface setting, thereby cover layer is suitable for being arranged between die surface and the shape.
6. equipment as claimed in claim 1, wherein mould has the ground floor of outer metallic surface and heat insulator, the ground floor of described heat insulator can be adjacent to outer metallic surface or the setting of adjacent metal outer surface, thereby ground floor is suitable for the heat transfer between the outer metallic surface that reduces shape and mould during the hot-stretch winding shaping of shape.
7. equipment as claimed in claim 6, the material that wherein forms ground floor is an electrically insulating material, thus ground floor is suitable for electric connection between the outer metallic surface that prevents shape and mould during the hot-stretch winding shaping of shape.
8. equipment as claimed in claim 6, wherein mould comprises the second layer of electrically insulating material, the second layer of described electrically insulating material can be arranged on one of them place of the primary importance and the second place, above-mentioned primary importance is between outer metallic surface and ground floor, and ground floor is arranged between the outer metallic surface and the second layer in said second position, thereby the second layer is suitable for electric connection between the outer metallic surface that prevents shape and mould during the hot-stretch winding shaping of shape.
9. equipment as claimed in claim 1 also comprises heating source, and described heating source is suitable for shape is heated to forming temperature.
10. equipment as claimed in claim 9, wherein heating source comprises power supply and electric conductor a pair of and the power supply electric connection; Electric conductor is suitable for and the shape electric connection, is used for resistance mode heating of metal section bar.
11. a method may further comprise the steps:
The heating of metal section bar;
Apply tensile force to shape through heating; With
Reel through the shape of heating around working surface, above-mentioned working surface be by heat insulator and electrically insulating material one of them forms at least.
12. method as claimed in claim 11, the step of wherein reeling comprises around the step of the shape of the surface coiling process heating of the metal die with layer of material, above-mentioned layer of material separates the surface of metal die and shape through heating, wherein above-mentioned layer of material by heat insulator and electrically insulating material one of them forms at least.
13. method as claimed in claim 11, the step of wherein reeling comprises around the step of the shape of the outer surface coiling process heating of the metal die with one deck electrically insulating material, described one deck electrical insulation material layer separates the outer surface of metal die with the shape that process heats, to prevent electric connection between shape and the metal die.
Reel through the step of the shape of heating 14. method as claimed in claim 11, the step of wherein reeling comprise around working surface, this working surface is formed by the not only material of heat insulation but also electric insulation.
15. method as claimed in claim 11, the step of wherein reeling comprise that this above-mentioned working surface is formed by ceramic material at least in part around the step of working surface coiling through the shape of heating.
16. method as claimed in claim 11, the step of wherein reeling comprise that this working surface is formed by the superficial layer of fibrous refractory material at least in part around the step of working surface coiling through the shape of heating.
17. method as claimed in claim 11, wherein heating steps comprises and makes electric current pass through shape so that with the step of resistance mode heating of metal section bar.
18. method as claimed in claim 11 comprises also tectal step is set that described cover layer comprises the working surface between the die surface of shape and die main body; And the step of wherein reeling comprises around the step of the shape of cover layer and the heating of die surface coiling process.
19. method as claimed in claim 11, also comprise with shape insert die cavity with flexible laminated come to on the die cavity border surface of die cavity deckle circle so that make flexible layers comply with the die cavity border surface and comply with the step of the coupling outer surface of shape, wherein flexible layers by heat insulator and electrically insulating material one of them forms at least.
20. method as claimed in claim 11, wherein heating steps comprises the step that shape is heated to uniform temperature, and this temperature is uniform basically on whole shape; And be included in the whole coiling step and keep this step of even temperature basically.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/432,045 US20070261461A1 (en) | 2006-05-11 | 2006-05-11 | Method and apparatus for hot forming elongated metallic bars |
| US11/432,045 | 2006-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101505888A true CN101505888A (en) | 2009-08-12 |
Family
ID=38683854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200780016841XA Pending CN101505888A (en) | 2006-05-11 | 2007-05-08 | Method and apparatus for hot forming elongated metallic bars |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070261461A1 (en) |
| EP (1) | EP2016279A4 (en) |
| JP (1) | JP2009536881A (en) |
| KR (1) | KR20090008383A (en) |
| CN (1) | CN101505888A (en) |
| WO (1) | WO2007133548A2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814368A (en) * | 2012-08-23 | 2012-12-12 | 北京航空航天大学 | Compound molding tool system for hot stretch bending and creep deformation of section bar and application method of compound molding tool system |
| CN106825250A (en) * | 2017-04-01 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of mould |
| CN111644498A (en) * | 2020-06-12 | 2020-09-11 | 中国航空制造技术研究院 | Control method for electrothermal stretch bending process of titanium alloy section and stretch bending forming device |
| CN112157157A (en) * | 2020-09-11 | 2021-01-01 | 中国航空制造技术研究院 | Forming method and correcting device for titanium alloy thin-wall component |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180015522A1 (en) * | 2016-06-20 | 2018-01-18 | Imam Khomeini International University | High-speed hot forming and direct quenching |
| CN109954773A (en) * | 2019-04-30 | 2019-07-02 | 长春工业大学 | A kind of mental section multiple spot Three Dimensional Thermal stretch wrap forming equipment |
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| US2952767A (en) * | 1960-09-13 | Thermo stretch forming of metal | ||
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| US3584487A (en) * | 1969-01-16 | 1971-06-15 | Arne H Carlson | Precision forming of titanium alloys and the like by use of induction heating |
| US3722068A (en) * | 1971-02-22 | 1973-03-27 | Northrop Corp | Method for forming titanium sheets |
| US3934441A (en) * | 1974-07-08 | 1976-01-27 | Rockwell International Corporation | Controlled environment superplastic forming of metals |
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| US4011429A (en) * | 1975-10-20 | 1977-03-08 | Northrop Corporation | Hot stretch-wrap forming with resistance heating |
| US4188811A (en) * | 1978-07-26 | 1980-02-19 | Chem-Tronics, Inc. | Metal forming methods |
| US4242899A (en) * | 1979-03-05 | 1981-01-06 | The United States Of America As Represented By The Secretary Of The Air Force | Thermoclamps |
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| FR2620956A1 (en) * | 1987-09-29 | 1989-03-31 | Inst Francais Du Petrole | METHOD FOR FORMING TITANIUM OR TITANIUM ALLOY SURFACE SHEET ELEMENT |
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| WO2000074441A1 (en) * | 1999-06-01 | 2000-12-07 | Mehmet Terziakin | Instant heating process with electric current application to the workpiece for high strength metal forming |
| DE10063287B4 (en) * | 2000-12-19 | 2007-05-03 | Airbus Deutschland Gmbh | Method for forming a metal sheet |
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-
2006
- 2006-05-11 US US11/432,045 patent/US20070261461A1/en not_active Abandoned
-
2007
- 2007-05-08 EP EP07794657A patent/EP2016279A4/en not_active Withdrawn
- 2007-05-08 KR KR1020087028366A patent/KR20090008383A/en not_active Application Discontinuation
- 2007-05-08 JP JP2009509814A patent/JP2009536881A/en not_active Withdrawn
- 2007-05-08 WO PCT/US2007/011115 patent/WO2007133548A2/en active Application Filing
- 2007-05-08 CN CNA200780016841XA patent/CN101505888A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814368A (en) * | 2012-08-23 | 2012-12-12 | 北京航空航天大学 | Compound molding tool system for hot stretch bending and creep deformation of section bar and application method of compound molding tool system |
| CN106825250A (en) * | 2017-04-01 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of mould |
| CN106825250B (en) * | 2017-04-01 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of mold |
| CN111644498A (en) * | 2020-06-12 | 2020-09-11 | 中国航空制造技术研究院 | Control method for electrothermal stretch bending process of titanium alloy section and stretch bending forming device |
| CN111644498B (en) * | 2020-06-12 | 2021-09-10 | 中国航空制造技术研究院 | Control method for electrothermal stretch bending process of titanium alloy section and stretch bending forming device |
| CN112157157A (en) * | 2020-09-11 | 2021-01-01 | 中国航空制造技术研究院 | Forming method and correcting device for titanium alloy thin-wall component |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007133548A2 (en) | 2007-11-22 |
| JP2009536881A (en) | 2009-10-22 |
| EP2016279A4 (en) | 2010-06-23 |
| EP2016279A2 (en) | 2009-01-21 |
| WO2007133548A3 (en) | 2009-03-26 |
| US20070261461A1 (en) | 2007-11-15 |
| KR20090008383A (en) | 2009-01-21 |
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Open date: 20090812 |