CN104174795A - Plant and method for hot forming blanks - Google Patents

Plant and method for hot forming blanks Download PDF

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Publication number
CN104174795A
CN104174795A CN201410279641.5A CN201410279641A CN104174795A CN 104174795 A CN104174795 A CN 104174795A CN 201410279641 A CN201410279641 A CN 201410279641A CN 104174795 A CN104174795 A CN 104174795A
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CN
China
Prior art keywords
blank
reheater
aforementioned
burner
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410279641.5A
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Chinese (zh)
Inventor
M·博尔斯
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Linde GmbH
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Linde GmbH
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Publication of CN104174795A publication Critical patent/CN104174795A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • 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
    • C21D1/52—Methods of heating with flames
    • 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
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • 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
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
    • F27B9/022—With two tracks moving in opposite directions
    • F27B9/023—With two tracks moving in opposite directions with a U turn at one end
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/243—Endless-strand conveyor
    • 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
    • C21D2221/00—Treating localised areas of an article

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

A system for hot-forming blanks (P) includes at least one heating device (4) and at least one pressing device (8) arranged downstream of the at least one heating device (4), and at Least one reheating device (6) for at least partially acting upon the blanks (P) formed in the pressing device with heat provided downstream of the pressing device (2).

Description

For making the system and method for blank thermoforming
Technical field
The present invention relates to a kind of for making the system of blank thermoforming, and a kind of for making the correlation method of blank thermoforming.
Background technology
The thermoforming of metallic plate, in the processing of parts, especially for car body, is a relatively new development trend.In the application's context, the metallic plate being used in this situation is also referred to as " blank " according to trade language used in field shaping technique.Blank forms by being correspondingly cut into certain size, punching press, connection and/or preformed metallic plate conventionally.Yet method of the present invention not only can be for the metallic plate correspondingly preparing, can also be for used raw material.So, the present invention relates to all workpiece and semi-finished product, it can for example be formed in corresponding forming operation by compacting and/or deep draw.
Thermoforming makes it possible to freely knock-on process and has the high-strength parts of complex geometric shapes, and makes it possible to reduce significantly for example weight of its car body of producing, and improves for example security of the passenger in corresponding vehicle.
Due to the strength and stiffness of structure member are had to stricter requirement, particularly in vehicle, so use more and more the steel of high strength and superhigh intensity for these application.The intensity increasing can reduce the weight of vehicle, makes especially, can reduce discharge and the fuel consume of pollutant.In current vehicle, the use of thermoforming parts can reduce the weight over 30kg.
Thermoforming process is the combination of moulding and hardening technique in essence.The use of corresponding steel, for example, for example manganese boron steel can obtain the intensity up to 1,500MPa.In die quenching method, for example, blank is heated to above the temperature that becomes austenitic temperature completely, and for example, higher than 850 ℃, blank is quenched in instrument subsequently.Obtain so the required martensitic structure with desirable strength.In instrument, the combination of processing and forming and the processing of quenching is also sometimes referred to as die quenching or moulding sclerosis.
In the thermoforming of the ultrastrength material for car body, for example, so-called roller hearth furnace is used to preheating blank.The heating of this stove is conventionally by means of by electrically heated radiant tube or realize by means of gas burner.In order to realize the shortest fabrication cycles time, advantageously in system, provide certain " deposit " of preheating parts.The heat treatment time of tempering steel is the decisive parameters that limit the circulation timei of corresponding compacting.Roller hearth furnace has the length up to 40 meters, so have corresponding structural requirement, described structural requirement comprises effectively removes waste heat.Be used as also thering is corresponding shortcoming for the rotary drum kiln of the replacement of the roller hearth furnace of preheating parts.They are also heated by means of radiant tube, very unsatisfactory in efficiency.
Die quenching parts are characterised in that the strength and stiffness that they are high.As mentioned above, this makes to reduce the thickness of metallic plate and therefore reduces weight.Yet problem is low fracture elongation, this can cause during procedure of processing subsequently, forming crackle for example on being welded on miscellaneous part time.This is why to wish to realize for example some region of body part in the mode of die quenching, and other regions of realizing same parts make them have compared with high ductility and therefore can absorb the more multipotency producing due to plastic deformation.
Prior art attempts producing different qualities or so-called " the customization characteristic " of this part, including the corresponding half-finished alloy of destination impact forms, the manufacture of so-called " customization welding blank ", the blank being connected into by different materials, by means of induction heating technique or conduction heating technique, by part (part), heated, by means of local heat partly tempering die quenching instrument some region and cover some component area, to suppress heating in corresponding roller hearth furnace (and therefore becoming austenite).Yet, these method elaborate, therefore usually unsatisfactory and very expensive.
Therefore, need improved selection scheme, for manufacturing the blank with local different qualities.
Summary of the invention
Based on these situations, the present invention proposes a kind of for making the system of blank thermoforming, and corresponding for making the method for blank thermoforming, each feature of its tool independent claims.Preferred embodiment forms dependent claims and description below.
Due to according to the operation of heating more at least partly proposed by the invention, so can obtain blank and the parts with local different qualities in especially effective mode, heating operation again described in wherein implementing after moulding or die quenching blank in pressure setting.According to the present invention, especially can realize the very complicated shape with material requested characteristic, for example in any position, there is the ductility of increase.
Term as above " blank " should be explained all sidedly in the application's context.This term comprises metallic plate, semi-finished product product, connection and/or preformed parts, and it is thermoformed in corresponding system, particularly die quenching.
Particularly advantageous aspect of the present invention relates to uses premixed hydrogen-oxygen burner or combustion gas-oxygen burner.For example, such burner is substantially known from for example DE10345411A1.For example, premixed gas-oxygen burner is used to the hot theory of adjustment of the parts of so-called glass component, particularly lead crystal glass or soda-lime glass.In this case, at least part of surface of glass component is heated by burner and melts.Corresponding burner is also known as so-called Hydropox burner, and is sold by the applicant with this brand name.
Premixed gas-oxygen burner, particularly oxygen-hydrogen burner are characterised in that extra high heat transfer efficiency.Compared with so-called external mix burner, the fuel mixture of combustion gas and oxygen has been fed into the burner head of premixed gas-oxygen burner, rather than finally in corresponding burner head, produces.Premix burner produces strong especially flame, and it is suitable for the surface area that fusing is larger, and this surface area also may have depression or other irregular features.According to the present invention, than the burner of external mix, determine that this is conclusive advantage.The burner of external mix only can produce soft flame, and it particularly can not be penetrated in surperficial corner, hole or depression.Therefore, use some region that premix burner can the corresponding blank of local heat, particularly there is difform region.Although extend heating by external mix burner, also can realize high temperature, whole blank may occur and be heated and be not that only desired zone is heated.
According to the particularly preferred embodiment of system of the present invention, realize at least one reheater, it can be led and/or Three-dimensional movable by solid.For example, according to reheater used in the present invention, can be installed on industrial robot.This makes or on this surface, to guide exactly and to locate reheater along the surperficial of molded blank, make it in required region (partly), to be uniformly heated required temperature range, for example 650 ℃-850 ℃, particularly 700 ℃-800 ℃, preferably approximately 750 ℃.
Heater (especially for fully heating blank before forming operation in pressure setting) the preferably form with austenitizing device is implemented.Austenitizing is preferred completely in this case.Austenitizing provides required material behavior, and it makes to suppress subsequently and cooling or quenching blank of while, then heats at least partly (heating again) blank.Especially, corresponding austenitizing device is designed to local heat blank to 750-1050 ℃, particularly 800-1000 ℃, for example temperature of 850-950 ℃.Corresponding temperature depends on each material and is positioned on austenitizing temperature.For example, the austenitizing temperature of above-mentioned manganese boron steel is at about 850 ℃.If corresponding blank is preheated to the temperature a shade below austenitizing temperature, by corresponding burner, can reaches fast austenitizing temperature or surpass so, particularly in the presumptive area of blank.During compacting or forming operation, in this cooling processing, blank is preferably cooled to the temperature of 100-200 ℃, and wherein any temperature between cool to room temperature and 250 ℃ is also possible.
And, advantageously, the feature of corresponding system be also to have at least one for blank is loaded into the loading attachment of system and/or at least one for blank is sent to system at least one pressure setting conveyer and/or at least one is for being sent to blank the conveyer of reheater.
Described at least one heater advantageously comprises at least one chain-bucket stove.For example, can use generally well-known vertical chain-bucket stove, it has improved energy efficiency and the particularly substitute of traditional roller hearth furnace, and traditional roller hearth furnace has as mentioned above large physical dimension and therefore has corresponding structural requirement.For example, chain-bucket stove can heat by electrical heating or by fuel, and can in corresponding temperature range, operate, and makes to guarantee effectively and reliably to add hot-working.
According to each material of blank, regulate each temperature.As mentioned above, the complete austenitizing temperature of manganese boron steel is at about 850 ℃.Those skilled in the art can easily obtain corresponding temperature from obtainable material parameter.
Advantageously, also by least one premixed hydrogen-oxygen burner or combustion gas-oxygen burner, carry out heater.This can realize blank very effective equally, and particularly region heating.
Although this heater, particularly austenitizing device, is optimized for the complete austenitizing of blank in the present invention, but it can also be used to partly heat blank, especially for austenitizing blank, for heating or some region or the regional area of austenitizing blank.In this case, at least one burner flame in premixed hydrogen-oxygen burner can be directed to treats part heating, particularly on the region of austenitizing.Therefore, corresponding burner apparatus can be realized especially to the local austenitizing of the restriction in region, in described region, can for example by die quenching, obtain high local strength subsequently.Yet, after die quenching operation, in non-austenitizing region, guarantee the ductility that material is enough.Like this, what can expect is, for example, can be so that add hot-working by means of heater in the first area of blank by this part before forming operation, and by means of reheater, by adding hot-working, in the second area of blank, there is required ductility in forming operation subsequently.
In corresponding system, heater, austenitizing device, and preheating apparatus especially is advantageously realized with the form of a construction unit.This makes it possible to achieve the system of compactness and energy efficiency, this system there is little physical dimension and for example only need one heat insulation.
Method of the present invention comprises the following steps: blank is loaded in system of the present invention, at heater, blank described in local heat or austenitizing at least in austenitizing device particularly makes blank moulding and the described blank of heating at least partly in reheater subsequently by compacting in pressure setting.As mentioned above, described pressing operation can also relate to die quenching processing.
The present invention is for making the system and method for blank thermoforming similarly benefit from above-mentioned advantage.
Much less be above-mentioned feature and below by the feature of describing, not only can in described respectively combination, be used, and can in other combinations or individuality, be used under the situation that does not depart from the scope of the invention.
Schematically illustrate in the accompanying drawings one exemplary embodiment of the present invention, and be described in greater detail below this embodiment with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 has shown a preferred embodiment according to the present invention, for making the schematic diagram of the system of blank thermoforming.
Fig. 2 has shown the schematic diagram of the burner head that is applicable to one embodiment of the invention.
Fig. 3 has shown according to an embodiment of the invention, for making the flow chart of the method for blank thermoforming.
The specific embodiment
If applicable, the element of identical function or operation represents with identical Reference numeral in the accompanying drawings, and is not repeated for their description of object of simplifying.
Fig. 1 has shown a preferred embodiment according to the present invention, for making the system of blank thermoforming.This entire system is represented by Reference numeral 10.Its feature is loading attachment 3, corresponding blank P wherein, and for example the metal sheet of punching press can be loaded onto in corresponding system along the direction (lower horizontal arrow) of arrow.Heater 4 is provided and it is characterized in that illustrated chain-bucket stove 4a.Blank P is sent in the lower area of heater 4 along the direction of arrow, rises (as represented in vertical arrows), and is heated constantly in raised.Blank can be in chain-bucket stove 4a so that the mode of their austenitizings be heated.Yet in the embodiment that Fig. 1 shows, the feature of heater 4 is the austenitizing device 4b that are disposed in chain-bucket stove 4a downstream.In this case, chain-bucket stove is for preheating blank.
Blank P leaves the upper area of chain-bucket stove 4a again, along the direction (upper level arrow) of arrow.Subsequently, they are by austenitizing device 4b, and to be burner 14 represent with the form of three flame burners the feature of this austenitizing device.Burner 14 can have the burner flame of any number.Burner 14 can also move and act on continuously in the zones of different of blank P.For this reason, can provide corresponding mobile device, this mobile device can also be for example by using corresponding control to order about in completely automatic mode.Blank P by austenitizing device 4b, is heated to the temperature (for example, 900 ℃) on the austenitizing temperature that is positioned at corresponding material along the direction of arrow simultaneously.
Blank P arrives conveyer 5 subsequently, by means of this conveyer blank, is sent to operated pressing tool 8.Operated pressing tool 8 makes blank moulding in a desired manner, and wherein blank is cooled to approximately 200 ℃ or lower during forming operation simultaneously.
Due to this cooling or processing of quenching preferably occurring to surpass the speed of 30K/sec, at austenitizing region generating martensitic structure or the hard structure of blank.
As mentioned above, the blank of moulding has the temperature of approximately 200 ℃ under this state.Under this state, the blank by means of reheater 16 moulding is partly heated now, and the feature of described reheater is at least one premixed hydrogen-oxygen burner 18 or combustion gas-oxygen burner.Like this, hard structure is converted into mixed structure, and described mixed structure for example has improved ductility in the heated position of molded blank.
For example, reheater 16 can be installed on (not shown) industrial robot, makes the burner 18 can be by Three-dimensional movable and guiding.This makes along parts surface pilot burner 18 exactly, to make it can in required region, be uniformly heated the temperature of approximately 650 to 850 ℃.The structural change obtaining like this causes the hardness that for example reduces and percentage elongation or the ductility of increase.In experiment test, for example, can improve ductility up to 18%.
Burner 18 can have geometry (can also have less diameter, for example, for pad region) arbitrarily, and therefore can regional heater block or molded blank P.In this case, energy transmission is very effective, and the processing time can be lowered to several seconds.
Than other heating technique, for example, because inner radius can not be heated the eddy-current heating that is not suitable for solid geometry shape or blank shape rightly, the present invention has obvious advantage.
Than traditional laser assisted method, method of the present invention also provides advantage.Although laser assisted method can be carried out similar task conventionally, high-energy-density and relative little focus surface need very high effort, and for example, for heating larger coherent region, efficiency is lower in actual applications to make the method for the type.
Method of the present invention can be subsequently with high flexible and effectively mode heat blank, the blank of stereo shaping particularly, the subregion of the bristle base of UHS steel for example, wherein the ductility of material can be increased to enough values for autotelic distortion.
According to burner used in the present invention, make it possible to achieve for example surface area and be multiplied by 20cm up to 10 2focal surface.Particularly preferably be the burner that use can realize the focal surface of 2cm * 2cm or 4cm * 2cm.
In Fig. 2, illustrate the preferred embodiment of burner head of the present invention.
In Fig. 2, by Reference numeral 22, represented according to applicable premix burner head of the present invention.
According to the feature of premixed hydrogen-oxygen burner used in the present invention, be passage 221, hydrogen-oxygen mixture can be fed into burner head 22 by this passage, and can produce very strong burner flame, guarantees that very good energy transmits.This makes passable, particularly, in more reliable mode, required heat is acted on and has recess or more on the region of complex outline.In this case, therefore corresponding admixture of gas exits burner nozzle 223 and is lighted in this position with the form of mixture.
Fig. 3 has shown according to a particularly preferred embodiment according to the invention, the flow chart of method 100.In first step 101, corresponding blank P is struck out by metallic plate.In second step 102, these blanks for example, are loaded onto in thermoforming system of the present invention by means of loading attachment.This loading process can recur.In step 103, blank P is preheated in system, and wherein said apparatus can be for this object.Then, in step 104, there is the austenitizing of the above-mentioned type.After austenitizing, in step 105, blank P is sent in operated pressing tool by means of conveyer, then in step 106 in described operated pressing tool blank by moulding or compacting and quench simultaneously.After in operated pressing tool, quenching is processed, under this state, can there is the die quenching blank of complicated three-dimensional shape by means of reheater, particularly premixed hydrogen-oxygen burner or combustion gas-oxygen burner are in a desired manner by part heating (step 107), make can obtain the there is desirable characteristics mixed structure of (for example, improved ductility) in the region of heating.

Claims (11)

1. one kind for making the system of blank (P) thermoforming, described system has at least one heater (4) and at least one pressure setting (2), described pressure setting is disposed in the downstream of described at least one heater (4) and for making blank moulding, it is characterized in that, in the downstream of pressure setting (2), provide at least one reheater (16), described reheater is for making heat act at least in part the blank (P) in described pressure setting moulding.
2. system according to claim 1, is characterized in that, the feature of described reheater (16) is at least one premixed hydrogen-oxygen burner or premixed gas-oxygen burner (18).
3. according to the system one of aforementioned claim Suo Shu, it is characterized in that, described reheater (16) can be by Three-dimensional movable and/or guiding.
4. according to the system one of aforementioned claim Suo Shu, it is characterized in that, described heater (4) is the form of austenitizing device.
5. according to the system one of aforementioned claim Suo Shu, it is characterized in that, described system also has for blank being loaded into the loading attachment (3) of system and/or for blank being sent to at least one conveyer of described at least one pressure setting and/or for the blank of moulding being sent to at least one conveyer of described at least one reheater (16).
6. according to the system one of aforementioned claim Suo Shu, it is characterized in that, described heater (4) comprises at least one chain-bucket stove.
7. according to the system one of aforementioned claim Suo Shu, it is characterized in that, the feature of described heater is at least one premixed hydrogen-oxygen burner or premixed gas-oxygen burner.
8. according to the system one of aforementioned claim Suo Shu, it is characterized in that, described pressure setting (8) is implemented in such a way: when making blank moulding, and by blank cool to room temperature to 300 ℃, particularly 150 ℃ to 250 ℃ or be less than the temperature of 200 ℃.
9. according to the system one of aforementioned claim Suo Shu, it is characterized in that, the subregion of molded blank is heated to about 650-850 ℃, particularly 700-800 ℃ in described reheater (16), preferably the temperature of approximately 750 ℃.
10. one kind for making the method for blank thermoforming, wherein said blank is loaded onto according in the system one of aforementioned claim Suo Shu, in the heater of described system, be heated to austenitizing temperature, moulding and being simultaneously cooled in pressure setting, then in reheater, be heated at least in part about 650-850 ℃, 700-800 ℃ particularly, the preferably temperature of approximately 750 ℃.
11. methods according to claim 10, is characterized in that, apply blank and are thermoformed, and the blank that is particularly coated with aluminium, silicone or zinc is thermoformed.
CN201410279641.5A 2013-05-23 2014-05-21 Plant and method for hot forming blanks Pending CN104174795A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013008853.4A DE102013008853A1 (en) 2013-05-23 2013-05-23 Plant and method for hot forming of blanks
DE102013008853.4 2013-05-23

Publications (1)

Publication Number Publication Date
CN104174795A true CN104174795A (en) 2014-12-03

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US (1) US20140345753A1 (en)
EP (1) EP2806041A3 (en)
KR (1) KR20140138074A (en)
CN (1) CN104174795A (en)
BR (1) BR102014012331A2 (en)
CA (1) CA2851920A1 (en)
DE (1) DE102013008853A1 (en)
IN (1) IN2014CH02508A (en)
TW (1) TWI589702B (en)

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CN108884508A (en) * 2016-01-25 2018-11-23 施瓦兹有限责任公司 Heat treatment method and annealing device
CN109652622A (en) * 2017-10-11 2019-04-19 丰田自动车株式会社 Steel plate member and the method for producing steel plate member

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DE102015014490A1 (en) 2015-11-10 2017-05-11 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Process for processing a sheet metal workpiece
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