WO2022199948A1 - Heizvorrichtung für ein stangenartiges werkstück - Google Patents
Heizvorrichtung für ein stangenartiges werkstück Download PDFInfo
- Publication number
- WO2022199948A1 WO2022199948A1 PCT/EP2022/053806 EP2022053806W WO2022199948A1 WO 2022199948 A1 WO2022199948 A1 WO 2022199948A1 EP 2022053806 W EP2022053806 W EP 2022053806W WO 2022199948 A1 WO2022199948 A1 WO 2022199948A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heating
- module
- heating device
- workpiece
- working gas
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 205
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims description 23
- 238000009423 ventilation Methods 0.000 claims description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 74
- 238000011161 development Methods 0.000 description 10
- 230000018109 developmental process Effects 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
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- 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
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- 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
- F27B9/028—Multi-chamber type 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/40—Direct resistance heating
-
- 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
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- 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
- C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
-
- 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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
-
- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
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- 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
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
- F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
-
- 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
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
- F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
-
- 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
-
- 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
- F27B9/201—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 walking beam furnace
- F27B9/208—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 walking beam furnace the workpieces being rotated during their advance
-
- 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
-
- 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
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
- H05B6/102—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces the metal pieces being rotated while induction heated
-
- 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
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
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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
- the present invention relates to a heating device for heating rod-like, electrically conductive workpieces, such as metal rods and/or non-ferrous metal rods, in the preferred embodiment aluminum rods.
- Heating devices for rod-like, electrically conductive workpieces are generally known from the prior art.
- EP 2 337 871 B1 describes a generic heating device known as an inline oven for rod-like, electrically conductive workpieces, which run through the heating device along a conveying direction and first pass through a first heating module for preheating and then a second heating module for final heating with a higher heat output.
- the generic heating device comprises an induction module, which comprises power coils for generating eddy currents in the workpiece to be heated, which extend along the conveying direction of the workpiece.
- the gas furnace and the induction module form a continuous heating chamber for the workpiece, they must have a thermal decoupling section to avoid flashover between the gas furnace and the induction module in order to prevent damage to the induction module from flashover flames.
- the decoupling section increases the longitudinal extent of the Heater leads and thus increases the structural complexity for the manufacture of the heater.
- the rod-like workpieces lose heat that has already been introduced when passing through the decoupling section, despite complex thermal insulation that causes additional costs, which is why the overall efficiency of the heating device is also reduced by the heat loss occurring in the decoupling section.
- the present invention is therefore based on the object of specifying a heating device which overcomes the disadvantages known from the prior art.
- the object of the present invention is to specify a heating device that is compact in terms of its longitudinal extent and structurally simple to implement for efficient heating of the rod-like, electrically conductive workpieces before an immediately subsequent mechanical treatment by means of a pressing process.
- a heating device for heating rod-like, electrically conductive workpieces, in particular metal rods and/or
- Non-ferrous metal rods such as aluminum rods, which can be conveyed through the heating device along a conveying direction, with a heating module which is first in relation to the conveying direction and has a first Includes an input area and a first output area and with a second heating module with respect to the conveying direction, which has a second input area and a second output area, wherein the second heating module is designed as an induction module for inductive heating of the electrically conductive workpiece.
- the invention provides that the first heating module is designed as a convection module with heating means, which is designed and set up in such a way that a working gas can circulate between the heating means and the workpiece to be heated, in order to first heat the working gas with the heating means and then the Flow towards the workpiece with the working gas to introduce heat output.
- the first exit area is structurally arranged directly on the second entry area, which results in an advantageous minimization of the longitudinal extension of the heating device in accordance with the invention in order to form an energetically efficient and structurally compact heating device.
- the outlay on components can thus be reduced, since a decoupling section that is customary in the prior art can be completely dispensed with.
- the longitudinal extension of the heating device according to the invention can be shortened by the structurally direct arrangement of the first output area on the second input area.
- This is advantageously made possible according to the invention, since no decoupling section is required in the present inventive heating device, since the temperature control by means of the working gas does not lead to the formation of flames.
- this also leads to an improved overall efficiency of the heating device, since there is no loss of temperature in the workpiece as it passes through the decoupling section.
- the structural effort by eliminating the decoupling section since there is no loss of temperature in the workpiece as it passes through the decoupling section.
- the workpiece is heated only by means of the working gas heated by the heating means, which circulates between the workpiece to be heated and the heating means. Flame formation in the first heating module can thus advantageously be completely avoided, which is why the second heating module can be structurally arranged directly next to the first heating module. The decoupling section is thus completely eliminated. Furthermore, the temperature of the working gas in the convection module according to the invention can be precisely controlled and regulated via the heating means, which is why the heat output that can be introduced into the workpiece can be precisely regulated in the first heating module.
- the heating means are designed as a gas burner, preferably a recuperation burner, and as an electrical resistance heating element, preferably a resistance-heated heating register.
- a gas burner preferably a recuperation burner
- an electrical resistance heating element preferably a resistance-heated heating register.
- the convection module for conducting the working gas comprises ventilation ducts, the ventilation ducts being designed in such a way that the air heated in the heating means can be guided to the workpiece as evenly as possible and without major temperature loss in order to Workpiece as large as possible with the heated working gas to flow and thus to realize a high heat input into the workpiece.
- the ventilation ducts enable a structural separation between the supply air and exhaust air of the working gas acting on the workpiece in order to avoid contact of the heated working gas before the workpiece flows with already cooled working gas after the flow.
- the configuration of the ventilation ducts enables the formation of a circuit for the working gas in order to enable the efficient heating of the workpiece by means of the working gas, which has been repeatedly heated by the circulation with the heating means and is therefore already pre-tempered.
- the convection module includes gas conveying means, in particular a ventilator or fan, for controlling and/or influencing an average flow rate of the working gas, in particular when it flows through the ventilation ducts.
- gas conveying means in particular a ventilator or fan, for controlling and/or influencing an average flow rate of the working gas, in particular when it flows through the ventilation ducts.
- the gas conveying means allow additional control and influencing of the heating process of the workpieces, since the flow rate of the working gas when it flows against the workpiece can be influenced and thus also increased in order to achieve the highest possible heat input into the workpiece.
- the working gas is preferably at least partially sucked in by the gas conveying means after it has flowed against and around the workpiece, in order to be heated again by the heating means to a flow temperature of between 730° C. and 750° C. and thus to achieve a high system efficiency.
- the gas conveying means preferably also enable the mean flow rate of the working gas specifically adapted to the temperature difference between the heating means and the workpiece in order to implement individual temperature profiles depending on the different material properties of the workpiece, such as the thermal diffusivity, or different diameters of the rod-like workpiece.
- the convection module includes a control unit for controlling an operating mode of the gas burner and the electrical resistance heating element, the control unit being designed such that, depending on user-generated and/or parameter-generated input signals, in a first operating mode only the gas burner, in a second operating mode only the electrical resistance heating element and in a third operating mode simultaneously the gas burner and the electrical resistance heating element can be activated for heating the working gas.
- the user-generated input signals are understood to mean the selection of the operating modes of the heating means by an operator.
- the operator only selects the gas burner as the heating medium for the complete heating process of the workpiece with the heating device according to the invention, with the workpiece being heated only by the working gas, which is in the form of hot exhaust air, when passing through the first heating module was previously heated by the gas burner, is flown.
- This advantageously leads to a reduction in the required electrical energy of the heating device, which is required for heating the workpiece, since the operation of the first heating module is also possible using gas as the energy source.
- the selection of the operating modes can also be parameter-generated, in which case there is a communication connection between the control unit and a communication partner in order to use data, such as the share of renewable energies in the current electricity generation of an energy system or current energy costs, such as a current electricity price (Instantaneous value) in relation to costs for a fossil fuel to enable automated activation of the operating modes.
- data such as the share of renewable energies in the current electricity generation of an energy system or current energy costs, such as a current electricity price (Instantaneous value) in relation to costs for a fossil fuel to enable automated activation of the operating modes.
- a surplus of renewable energies for example, a large proportion of the thermal energy can be generated based on resistance, i.e. purely conductively, in order to benefit from low electricity prices.
- the present development also enables optimized operation in order to technically implement a reduction in CO2 and impending fines in addition to the operating costs.
- the preferred design of the heating means as a gas burner also makes it particularly advantageous
- the convection module includes nozzle means for influencing the average flow rate of the working gas when it hits the rod-like workpiece.
- the nozzle means enable the heat input into the workpiece to be maximized, since the flow rate of the working gas can be specifically influenced and thus optimized immediately before the workpiece flows.
- This preferred embodiment also leads synergistically to a reduced overall length of the heating device according to the invention, since at a constant conveying speed of the workpiece, the heat input into the Workpiece can be maximized.
- the configuration of the nozzle means as a large number of slotted nozzles which are arranged adjacent to one another in the conveying direction of the workpiece and in particular extend in sections on the jacket side of the conveyable rod-like workpiece. Due to the large number of slot nozzles, the heated working gas is guided radially to the rod-like workpiece on the outer surface of the workpiece in order to achieve a large-area and therefore optimal inflow in relation to the heat input.
- the fan-like slit nozzles are formed by V-shaped wall sections in order to achieve an average flow rate of the working gas of up to 50m/s.
- the overall length of the heating device can also be reduced by the preferred configuration of the nozzle means by the plurality of slotted nozzles in order to achieve the compact longitudinal extent of the heating device according to the invention.
- the first heating module comprises at least two heating zones with a first convection module and at least one second convection module.
- this enables independent regulation of the temperature along the longitudinal extent of the heating device in the conveying direction, in order to heat the temperature of the working gas in particular to a value in the range from 730°C to 750°C and thus the workpiece to a temperature in the range of 380°C to be tempered up to 450°C.
- a high temperature gradient between the heated working gas and the (still heated) workpiece is preferably used in the first heating zone in order to realize a large temperature gradient and thus maximize the heat input into the workpiece. This advantageously contributes to minimizing the length of the heating device can.
- the induction module also has at least two independently controllable heating zones with a first induction module and at least one second induction module. This also enables the rod-like workpiece to be subjected to an axial temperature profile in order to implement an individual heating characteristic depending on the geometry of the rod-like workpiece and/or the material composition of the workpiece.
- the first heating module and the second heating module are designed in such a way that the conveying direction in the first heating module and the conveying direction in the second heating module extend along a common longitudinal axis, i.e. in other words the heating device extends along a straight line.
- this leads to a simplified structural realization of the heating device, since the workpieces only have to be moved transversally when passing through the heating device, ie they have to be conveyed along a common axis of extension.
- the first heating module has a longitudinal extension in the conveying direction of between 6m and 15m, preferably 6m to 12m, particularly preferably 6m to 10m and in which the second heating module has a longitudinal extent in the conveying direction of between 0.5m and 4m , preferably 0.8m to 2m, particularly preferably 0.8m to 1.6m.
- the details of the heating device illustrate the compact extension dimensions of the heating device according to the invention, which enables efficient hybrid heating of the workpiece and is characterized by a compact longitudinal extension. Further advantages and details of the invention result from the following description of preferred embodiments of the invention as well as from purely schematic drawings.
- Fig. 1 a heating device according to the invention according to a first embodiment, in
- Fig. 2 a heating device according to the invention according to a second embodiment, in
- Fig. 3 a sectional view of the heating device known from Fig. 1 according to the first embodiment
- Fig. 4 a perspective view of the heating device according to the invention according to the first embodiment and in
- FIG. 1 is a side perspective view of a first preferred embodiment 1A of a heater 1 according to the present invention for heating rod-type electric conductive workpieces 13 shown, which can be conveyed along a conveying direction R through the heating device 1 according to the invention to carry out the heating.
- the heating device 1 comprises a first heating module 2 and a second heating module 3.
- the first heating module 2 has a first inlet area 4 and a first outlet area 5, and the second heating module 3 comprises a second inlet area 6 and a second outlet area 7.
- the second heating module 3 is designed as an induction module 8 in order to heat the electrically conductive workpiece 13 by eddy currents, which can be generated by means of power coils that can be energized as a result of generated magnetic fields.
- the power coils enclose the workpiece 13 to be heated (material to be heated) concentrically, with a time-varying magnetic field being able to be generated by the power coils in order to generate the eddy currents required for heating in the metallic workpiece 13
- the power coils are designed either as induction coils that can be charged with an alternating current or preferably as rotating permanent magnets.
- the permanent magnets which are arranged around the workpiece 13 to be heated, can be set in rotary motion either directly as a rotor or indirectly via a belt drive, in order to thus generate the time-varying magnetic field.
- the first heating module 2 is designed as a convection module 9 with heating means 10 not shown in detail in the figure, the convection module 9 being designed such that a working gas between the heating means 10 and the receivable and to heated workpiece 13 can circulate, wherein the working gas is first heated when flowing through the heating means 10 and then implemented by the flow of the workpiece 13 a heat input into the workpiece 13.
- the convection module 9 of the first embodiment has a modular structure and includes two heating zones, each of which includes heating means 10 and can be operated independently of one another.
- the heating means 10 comprise both a gas burner 11, in order to enable the working gas to be heated by the combustion of a gaseous fuel, and an electrical resistance heating element 12, not shown in detail in the figure, which is formed here by a resistance-heated resistance register 23 and the heating of the working gas by converting electrical energy into thermal energy.
- the graphic representation also shows that the first output area 5 is structurally arranged directly on the second input area 6, which explains the compact design of the heating device 1 according to the invention with regard to the longitudinal extension in the conveying direction R.
- a decoupling section as is known, for example, from the generic prior art—can be dispensed with.
- the rod-like workpieces 13 to be heated are introduced into the heating device 1 through the first input area 4 and are transported by handling means in the form of rollers 20 along the conveying direction R through the first output area 5 into the second heating module 3 arranged directly behind it.
- the heating device 1 initially enables the workpieces 13 to be preheated by the convection module 8 to a temperature of between 380° C. and 450° C. by the circulating working gas, which is periodically heated by the heating means 10 to a temperature in the range of 730° C. to 750 °C is heated.
- the workpiece 13 is then further heated in the induction module 9 with high power in order to heat the workpiece to a final temperature of between 500° C. and 560° C. or preferably to a final temperature of up to 1000° C.
- the workpiece 13 comprises an aluminum alloy, it is preferred if the final temperature after passing through the induction module 9 is in the range from 500° C. to 560° C.
- the workpiece 13 can also comprise another non-ferrous metal, in particular copper or a copper alloy, in which case it is preferred if the preheating takes place to a temperature in the range from 580° C. to 600° C. and the final temperature after passing through the induction module 9 is between 700°C to 1000°C.
- the first heating module 2 initially comprises two heating zones, the first heating zone being formed from a first convection module 81 and the second heating zone being formed from a second convection module 82, which are arranged directly adjacent to one another.
- the temperature in the first convection module 81 can advantageously be regulated independently of the temperature in the second convection module 82 .
- the induction module 8 is also divided into individually controllable zones, which are formed by a first induction module 91 and a second induction module 92 .
- the subdivision of the heating device 1 into differently controllable zones enables the realization of axial temperature profiles in order to enable individual heating of the rod-like workpieces 13 .
- Fig. 3 shows a cross section of the heating device 1 according to the invention according to the first embodiment 1A known from Fig. 1 in the area of the first heating module 2.
- the illustration shows the rod-like workpiece 13 to be heated when passing through the heating device 1, which has a circular cross section and is mounted on a plurality of rollers 20, which form the handling means, in order to move through the heating device 1 in translation along the conveying direction R.
- a steel tube 21 with openings 24 on the shell side which is a component of the gas burner 11 designed here as a recuperative burner 22 in order to heat the working gas or at least partially heat it up to generate the combustion air.
- the gas conveying means 17 are arranged, which in the present case are formed by a fan 18 and partially suck in the combustion air for forming the working gas from the steel tube 21 in the vertical direction H, and then the working gas via ventilation ducts provided laterally opposite 16, which are arranged mirror-symmetrically to the workpiece 13 on both sides.
- the ventilation ducts 16 are arranged and designed in such a way that the working gas flows through the electrical resistance heating element 12 for alternative or additional heating of the working gas by means of electrical energy.
- the electrical resistance heating element 12 which is embodied here as a resistance-heatable heating register 23, is located between the gas conveying means 17 and the workpiece 13 to be flowed on or to be heated with respect to the flow path of the working gas.
- Nozzle means 14 are formed at the end of the ventilation channels 16 in order to optimize the average flow rate of the working gas when it hits the workpiece 13 to be heated for a high heat input during active operation of the heating device 1 according to the invention.
- a first operating mode is implemented by a control unit 19 (not shown in detail), in which the working gas is generated and heated by the gas burner 11 .
- FIG. 4 shows a perspective sectional illustration of the heating device 1 known from FIG. 1 according to the first embodiment 1A.
- the sectional view shows areas of the first heating module 2 of the heating device 1 according to the invention, which is Convection module 9 is formed with hybrid heating means 10.
- the illustration shows that the gas burner 11 designed as a recuperative burner 22 extends along the conveying direction R over the rod-like workpiece 13 that can be accommodated. Also visible are the openings 24 formed in the steel tube 21 on the shell side, from which the gases produced during the combustion process emerge as hot combustion air for forming the working gas, which is then sucked in in the vertical direction H by the gas conveying means 17 .
- the working gas flows via the ventilation ducts 16 formed on the side via the resistance heating register 23 arranged on both sides onto the workpiece 13, it now being clear that the nozzle means 14 formed at the end of the ventilation ducts 16 are formed as a large number of slotted nozzles 15, which are arranged on the peripheral side of the workpiece 13 that can be accommodated and lead to an increase in the mean flow rate of the working gas when the workpiece 13 flows, in order to optimize the heat input into the workpiece 13
- FIG. 5 shows a further perspective representation of the heating device 1 according to the invention according to the second embodiment 1B.
- the illustration shows the large number of slotted nozzles 15, which ensure optimum heat input into the workpiece 13 realize.
- the slit nozzles 15 are partially on the shell side to the rod-like Workpiece 13 arranged to realize a substantially radial flow of the lateral surface of the workpiece 13 through the working gas.
- a slit nozzle 15 is formed by a pair of metal sheets arranged in a V-shape relative to one another, with an arcuate recess 26 being formed in the area tapering to a point for receiving the rod-shaped workpiece 13 .
- the large number of slotted nozzles 15 synergistically enables the overall extension of the heating device 1 according to the invention to be shortened, since the heat input into the rod-shaped workpiece 13 can be improved.
- the first heating module 2 shown comprises at least two heating zones with a first convection module 81 and at least one second convection module 82 which are separated from one another by a separating element 25 .
- FIG. 1A Heating device according to a first embodiment.
- FIG. 1B Heating device according to a second embodiment
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/284,144 US20240175632A1 (en) | 2021-03-26 | 2022-02-16 | Heating device for a rod-shaped workpiece |
EP22708086.8A EP4314357A1 (de) | 2021-03-26 | 2022-02-16 | Heizvorrichtung für ein stangenartiges werkstück |
JP2023559018A JP2024512616A (ja) | 2021-03-26 | 2022-02-16 | 棒状のワークの加熱装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102021107670.6A DE102021107670A1 (de) | 2021-03-26 | 2021-03-26 | Heizvorrichtung für ein stangenartiges Werkstück |
DE102021107670.6 | 2021-03-26 |
Publications (1)
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WO2022199948A1 true WO2022199948A1 (de) | 2022-09-29 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/053806 WO2022199948A1 (de) | 2021-03-26 | 2022-02-16 | Heizvorrichtung für ein stangenartiges werkstück |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240175632A1 (de) |
EP (1) | EP4314357A1 (de) |
JP (1) | JP2024512616A (de) |
DE (1) | DE102021107670A1 (de) |
WO (1) | WO2022199948A1 (de) |
Citations (7)
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GB1040931A (en) * | 1962-03-03 | 1966-09-01 | West Midlands Gas Board | Improvements relating to a furnace for and process of heating metal billets |
FR2284847A1 (fr) * | 1974-09-11 | 1976-04-09 | Siderurgie Fse Inst Rech | Procede et dispositif de rechauffage de demi-produits siderurgiques |
JPS6082244A (ja) * | 1983-10-09 | 1985-05-10 | Mazda Motor Corp | 鍛造用素材の加熱装置 |
DE102005029780A1 (de) * | 2005-06-24 | 2006-12-28 | Otto Junker Gmbh | Ofenanlage zum Anwärmen von langen Aluminiumsträngen |
EP2337871B1 (de) | 2008-09-22 | 2013-04-10 | I. A. S. Induktions- Anlagen + Service GmbH & Co. KG | Vorrichtung zur erwärmung stangenartiger werkstücke |
KR20150107284A (ko) * | 2014-03-14 | 2015-09-23 | 대원강업주식회사 | 스프링용 강선재의 가열시스템 및 가열방법 |
DE202016100564U1 (de) * | 2016-02-04 | 2016-03-31 | Extrutec Gmbh | Vorrichtung zur Erwärmung von Werkstücken unter Schutzgasatmosphäre |
Family Cites Families (5)
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DE50013171D1 (de) | 1999-09-10 | 2006-08-24 | Kramer Carl | Verfahren zur Wärmebehandlung von metallischen Pressbolzen |
DE102013104806A1 (de) | 2013-05-08 | 2014-11-13 | Sandvik Materials Technology Deutschland Gmbh | Bandofen |
DE102013105488A1 (de) | 2013-05-28 | 2014-12-04 | Thyssenkrupp Steel Europe Ag | Transportvorrichtung für heiße, dünnwandige Stahlteile |
DE102013114578A1 (de) | 2013-12-19 | 2015-06-25 | Sandvik Materials Technology Deutschland Gmbh | Glühofen und Verfahren zum Glühen eines Strangs aus Stahl |
DE102016009293A1 (de) | 2016-08-02 | 2018-02-08 | Vdeh-Betriebsforschungsinstitut Gmbh | Vorrichtung für eine indirekte Heizung eines Wärmebehandlungsprozesses in einer Industrieanlage, Steuerung für den Betrieb einer derartigen Vorrichtung, System mit einer derartigen Vorrichtung und einer Steuerung, Verfahren zum indirekten Heizen einer Kammer und Verwendung einer Vorrichtung für eine indirekte Heizung eines Wärmebehandlungsprozesses in einer Industrieanlage |
-
2021
- 2021-03-26 DE DE102021107670.6A patent/DE102021107670A1/de active Pending
-
2022
- 2022-02-16 WO PCT/EP2022/053806 patent/WO2022199948A1/de active Application Filing
- 2022-02-16 US US18/284,144 patent/US20240175632A1/en active Pending
- 2022-02-16 JP JP2023559018A patent/JP2024512616A/ja active Pending
- 2022-02-16 EP EP22708086.8A patent/EP4314357A1/de active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1040931A (en) * | 1962-03-03 | 1966-09-01 | West Midlands Gas Board | Improvements relating to a furnace for and process of heating metal billets |
FR2284847A1 (fr) * | 1974-09-11 | 1976-04-09 | Siderurgie Fse Inst Rech | Procede et dispositif de rechauffage de demi-produits siderurgiques |
JPS6082244A (ja) * | 1983-10-09 | 1985-05-10 | Mazda Motor Corp | 鍛造用素材の加熱装置 |
DE102005029780A1 (de) * | 2005-06-24 | 2006-12-28 | Otto Junker Gmbh | Ofenanlage zum Anwärmen von langen Aluminiumsträngen |
EP2337871B1 (de) | 2008-09-22 | 2013-04-10 | I. A. S. Induktions- Anlagen + Service GmbH & Co. KG | Vorrichtung zur erwärmung stangenartiger werkstücke |
KR20150107284A (ko) * | 2014-03-14 | 2015-09-23 | 대원강업주식회사 | 스프링용 강선재의 가열시스템 및 가열방법 |
DE202016100564U1 (de) * | 2016-02-04 | 2016-03-31 | Extrutec Gmbh | Vorrichtung zur Erwärmung von Werkstücken unter Schutzgasatmosphäre |
Also Published As
Publication number | Publication date |
---|---|
US20240175632A1 (en) | 2024-05-30 |
JP2024512616A (ja) | 2024-03-19 |
EP4314357A1 (de) | 2024-02-07 |
DE102021107670A1 (de) | 2022-09-29 |
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