EP2439289B1 - Procédé et four destinés au traitement de pièces à usiner - Google Patents

Procédé et four destinés au traitement de pièces à usiner Download PDF

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Publication number
EP2439289B1
EP2439289B1 EP10186516.0A EP10186516A EP2439289B1 EP 2439289 B1 EP2439289 B1 EP 2439289B1 EP 10186516 A EP10186516 A EP 10186516A EP 2439289 B1 EP2439289 B1 EP 2439289B1
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EP
European Patent Office
Prior art keywords
workpiece
contact surfaces
heating unit
pressure pistons
contact
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.)
Active
Application number
EP10186516.0A
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German (de)
English (en)
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EP2439289A1 (fr
Inventor
Rolf-Josef Schwartz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schwartz GmbH
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Schwartz GmbH
Priority date (The priority date 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 date listed.)
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Publication date
Priority to EP10186516.0A priority Critical patent/EP2439289B1/fr
Application filed by Schwartz GmbH filed Critical Schwartz GmbH
Priority to ES10186516.0T priority patent/ES2609328T3/es
Priority to PL10186516T priority patent/PL2439289T3/pl
Priority to KR1020137011576A priority patent/KR101869576B1/ko
Priority to US13/877,807 priority patent/US9840748B2/en
Priority to PCT/EP2011/066959 priority patent/WO2012045647A1/fr
Priority to MX2013003767A priority patent/MX356552B/es
Priority to BR112013008194A priority patent/BR112013008194A2/pt
Priority to CN201180048353.3A priority patent/CN103270178B/zh
Priority to JP2013532132A priority patent/JP6158086B2/ja
Publication of EP2439289A1 publication Critical patent/EP2439289A1/fr
Application granted granted Critical
Publication of EP2439289B1 publication Critical patent/EP2439289B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • 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
    • 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
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • 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
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets

Definitions

  • the invention relates to a method for treating at least one workpiece in a furnace, in which the workpiece is heated in a furnace chamber of the furnace by at least two heating units, wherein the workpiece has a first workpiece side and a second workpiece side, and wherein a first heating unit, the first workpiece side of the workpiece and a second heating unit heats the second workpiece side of the workpiece.
  • the invention further relates to a corresponding furnace for carrying out the method.
  • molded components In the field of production and treatment of molded components, it is customary to produce molded components specifically with desired material properties. For example, in the automotive industry, components such as control arms, B-pillars, or automotive bumpers are cured by complete heating followed by quenching. To do this, components made of steel must be heated at least to the austenitic temperature so that martensite forms during rapid cooling. By contrast, light metal components are heated to a softening temperature. In various applications, in particular the automotive technology, it is advantageous if molded components have different material properties in different areas. For example, it may be provided that a component in one area should have high strength, while in another area it should have a higher ductility in relation to it. This is achieved for example by a different heating of the individual areas.
  • the component is heated between two heated tools in the form of plates.
  • this method has the disadvantage that due to the required size of the plates after a short period of operation surface deformations and cracks in the plates arise because at each cycle, the allowable elastic deformation of the plates is exceeded by thermal deformation. The service lives of the tools are thus very low, so that this method is very expensive due to the high wear of the tools.
  • the known methods are therefore in particular not suitable for producing molded parts which partially in a middle region, for example in the area of the lock case in a B-pillar have a different structure than in the rest of the molded part, and at the same time given the requirements in the automotive industry to the Process reliability and the resulting quality standards, allowing the heating with very high heat transfer coefficients and therefore allow low operating costs and lowest primary energy consumption and high wear of the tools used is avoided.
  • the US patent US 3,461,709 discloses a hydraulic press installed in a furnace for plastically deforming and / or stress relieving metallic workpieces having a top plate and a bottom plate. Both plates are heated directly by integrated electric heating elements and are vertically movable. Each plate of the press has a corresponding contact surface, which is placed in direct contact with the treated workpiece by the vertical movement of the two plates. The contact surfaces are each divided in half. The workpiece is heated on both sides by direct contact with the vertically moving halves of the contact surfaces of the heating units.
  • the document D2 describes a deep-drawing press, which has an upper and a lower punch. On the stamp heated upper and lower sides of a tool are clamped. Between the top and bottom of the tool can be clamped by moving the press a metallic workpiece. Heatable punches also dive through the tool, which can plastically deform the clamped workpiece by a vertical movement in this area.
  • the object of the invention is therefore to provide a method for treating workpieces, which allows the formation of such different material and process properties while maintaining quality standards and at low cost.
  • An object of the invention is further to provide a corresponding furnace for carrying out the method.
  • the invention comprises a method of treating at least one workpiece in an oven, wherein the workpiece is heated in a furnace chamber of the furnace by at least two heating units, the workpiece having a first workpiece side and a second workpiece side.
  • a first heating unit heats the first workpiece side of the workpiece
  • a second heating unit heats the second workpiece side of the workpiece.
  • the two heating units each associated with a workpiece, and each heating unit comprises at least two plunger with heated contact surfaces, which are arranged side by side and with the same orientation.
  • the workpiece is heated by making contact between the first workpiece side of the workpiece and the contact surfaces of the at least two pressure stamps of the first heating unit, and also making contact between the second workpiece side of the workpiece and the contact surfaces of the at least two pressure stamps of the second heating unit.
  • the invention is based on the essential finding that the heating of a workpiece via contact heating with a large continuous contact surface is disadvantageous because such a contact surface due to the temperature conditions in Use is exposed to strong thermal changes in shape, which allows only a certain number of strokes.
  • a heating unit consisting of at least two pressure punches with smaller contact surfaces, however, this negative effect can be avoided and a method can be provided, with which the requirements can be fulfilled permanently.
  • two plungers per heating unit are the minimum requirement, but more than two plungers have proved to be even more advantageous.
  • the contact surfaces of the plunger of a heating unit are in contact with the workpiece in each case in different planes, whereby uneven workpieces with elevations and / or depressions can be contacted.
  • At least two of the plungers are vertically moved prior to heating the workpiece, from a position without contact between their contact surfaces and the workpiece sides of the workpiece in a position with contact between their contact surfaces and the workpiece sides the workpiece are moved.
  • the workpiece is placed horizontally in the oven chamber, and the workpiece is placed with the lower workpiece side on the contact surfaces of the plunger of the lower heating unit.
  • the upper heater unit plungers are then moved vertically down until there is contact between the contact surfaces of the upper heater unit plungers and the upper workpiece side, while the position of the lower heater unit plungers is not changed.
  • a charging device for charging the furnace with workpieces, which has at least one charging element on which the workpiece rests with its lower side of the workpiece, it can be provided that those pressure pistons of the lower heating unit are moved vertically downwards, which are located in the region of the charging element , And that the workpiece is then stored with the lower side of the workpiece on the contact surfaces of the other plunger of the lower heating unit.
  • the previously vertically moved down plungers are then again moved vertically up to their contact surfaces contact the lower workpiece side of the workpiece, and the plunger of the upper heating unit are moved vertically down until their contact surfaces make contact with the upper side of the workpiece.
  • the contact surfaces of the plunger are heated to different temperatures, which allows the heating of areas in the workpiece to different temperatures.
  • the contact surface of at least one pressure stamp is cooled.
  • the invention further comprises an oven for treating at least one workpiece comprising at least one oven chamber and at least two heating units for heating the workpiece in the oven chamber, the workpiece having a first workpiece side and a second workpiece side and the at least two heating units being arranged a first workpiece side of the workpiece is heatable by the respective first heating unit and the second workpiece side of the workpiece by the respective second heating unit, wherein each heating unit comprises at least two plungers and the contact surfaces of the plunger of a heating unit lie in different planes when contacting the workpiece.
  • the at least two heating units are each assigned to a workpiece, and each heating unit comprises at least two pressure stamps with heatable contact surfaces which are arranged next to one another and with the same orientation.
  • the workpiece is heatable in the oven chamber by making contact between the first workpiece side of the workpiece and the contact surfaces of the at least two pressure stamps of the first heating unit, and also making contact between the second workpiece side of the workpiece and the contact surfaces of the at least two pressure stamps of the second heating unit becomes.
  • At least two of the plungers are vertically movable, means being provided to move these plungers from a position without contact between their contact surfaces and the workpiece sides of the workpiece to a position with contact between their contact surfaces and the workpiece sides of the workpiece.
  • the contact surfaces of a plurality of pressure stamps arranged in rows and columns of a heating unit each form a heating surface whose dimensions correspond at least to the contours of the workpiece, wherein the contact surfaces of the pressure stamp of a heating unit in contact with the workpiece in each case a level or in different levels can be arranged.
  • the heating surface formed by the plunger of a heating unit thus one side of a workpiece can be contacted almost completely, but it can also be provided that at uneven workpiece surfaces with elevations and / or depressions only all horizontal surfaces are contacted, the contact surfaces of Plunging a heating unit to be positioned in different levels to achieve this.
  • the contact surfaces of the plunger are honeycomb-shaped, as this form has proved due to the largest inner surface with the smallest external length while avoiding unheated areas as an advantageous form.
  • the contact surfaces of the plunger of the first heating unit are arranged offset to the contact surfaces of the plunger of the second heating unit, whereby a uniform heating of the workpiece is achieved while avoiding unheated gaps between the contact surfaces.
  • the contact surfaces of the plunger can be heated to different temperatures, which increases the flexibility of the furnace in use, since different areas of a workpiece can be heated to different temperatures. It is also advantageous if at least one plunger is coolable. In a particular embodiment of the invention, the contact surface of at least one plunger is therefore selectively both heated and cooled.
  • At least two of the plungers of a heating unit may be selectively vertically movable.
  • Fig. 1 shows an embodiment of a furnace 10 according to the invention with two heating units 15 and 16 consisting of a plurality of pressure punches, wherein only the essential features of the furnace are shown.
  • the oven details can be selected by a skilled person in the usual way.
  • furnace 10 is an oven with a furnace chamber 11, in which at least one workpiece 20 is introduced for heating.
  • the oven 10 may be a station in a series of processing stations, wherein the oven 10 takes over the heating or at least a portion of the heating.
  • the furnace 10 preferably has a furnace body 14, into which the furnace chamber 11 is inserted with a feed opening 12 and an opposite removal opening 13, so that the furnace 10 can be charged from one side with a workpiece to be heated, while an already heated Workpiece is removed on the other side. A heated workpiece can then, for example, be transferred directly to a press after removal or held in a heat channel until it is processed at the next station.
  • the oven 10 does not necessarily have to have two openings, but may also comprise only one opening for loading and unloading.
  • the feed opening 12 and the removal opening 13 can be temporarily closed by oven flaps, and in the oven chamber 11 so a certain gas atmosphere can be generated.
  • only one workpiece 20 is heated over the length of the oven 10, so that no workpieces are arranged one behind the other, but this is not mandatory, if appropriate loading and unloading devices are present, which allow the simultaneous heating of several workpieces. But it is also possible to arrange over the width of the furnace 10 several workpieces side by side to heat them at the same time, or to operate several ovens 10 side by side to reduce the cycle time for subsequent stations.
  • a feeder 40 which is used in front of the oven 10, while behind the oven 10, a removal device 50 is used to remove heated workpieces from the oven 10.
  • both devices have a loading or removal element in the form of a fork, with which workpieces can be received.
  • the feeder 40 then has, for example, two forks 41 and 42, while the removal device 50 has two forks 51 and 52.
  • Both the charging device 40 and the removal device 50 are preferably designed so that they can move horizontally, so that they can pick up a workpiece 20 on the forks and move into the opened furnace chamber 11 or pick up a workpiece 20 in the furnace 10 and exit it.
  • the forks can also be designed to be vertically movable.
  • a loading and unloading device but also any other means in the form of robots or conveyor belts or combinations thereof may be used.
  • the oven chamber 11 preferably extends horizontally in the oven 10 so that the two heating units 15 and 16 are above and below the workpiece 20 when placed in the oven 10.
  • a first workpiece side 21 faces upward and can be heated by the upper heating unit 15 while the opposite workpiece side 22 is heated by the lower heating unit 16.
  • Each of the heating units 15 and 16 consists of at least two pressure punches, the distal end surfaces are heated. Such a contact surface is located on the workpiece 20 side facing a punch.
  • the plunger of both heating units are brought into contact with the workpiece 20, so that the workpiece 20 is heated by contact heating.
  • a heating unit according to the invention consists of at least two separate plungers with respective contact surfaces. However, these plungers and thus their contact surfaces are arranged so close together and aligned in the same direction that results in a heating surface, which is approximately continuous. If the workpiece 20 is plate-shaped and is introduced horizontally into the oven, the contact surfaces of the plunger thus also extend horizontally.
  • the distance between the individual contact surfaces of a heating unit is small, with distances of approximately 0.5 mm have proved advantageous, which can be considered in the context of this invention as approximately continuous heating surface.
  • the diameter of the contact surfaces is in the order of about 50 to 150 mm.
  • the actual size of the contact surfaces can be calculated from the thermal expansion of the stamp material used and the permissible elastic deformation and the desired life of the plunger.
  • a heating unit consists of more than two pressure punches, so that seen from above several rows and columns are formed from pressure punches to from their contact surfaces an approximately continuous heating surface form, with which a workpiece can be contacted and so heated.
  • a heating unit consists of more than two pressure punches, so that seen from above several rows and columns are formed from pressure punches to from their contact surfaces an approximately continuous heating surface form, with which a workpiece can be contacted and so heated.
  • the front row of the lower heating unit 16 comprises six pressure punches, since these are arranged in their horizontal position offset from the pressure punches of the upper heating unit 15, wherein the two right pressure punches are again identified by the reference numerals 32 and 33.
  • the contact surfaces of the plunger are honeycomb-shaped and arranged in a heating unit offset from one another so that they form an approximately continuous heating surface.
  • the hexagonal honeycomb shape has the advantage that, similar to a honeycomb, it has the largest inner surface with the smallest external length while avoiding unheated areas, and thus a surface can be filled and parqueted completely. Other geometries of the contact surfaces can also be displayed.
  • a heating surface in the context of this invention is to be understood not only an area formed by contact surfaces of the plunger, which are all in one plane, but the contact surfaces can also be located in different levels. Although the contact surfaces are then all the same orientation - ie, they all extend horizontally - but their vertical position may be different be. This can occur when plunger and thus their contact surfaces are moved vertically different. Projected onto one level, the contact surfaces then form a continuous heating surface, but this heating surface is offset in height.
  • This may still be referred to as a heating surface in the context of the invention, since the contact surfaces can heat, for example, an uneven surface of a workpiece with elevations and / or depressions. Although not horizontally extending surface sections then have no contact with the plunger, but this can possibly be accepted or may even be desirable.
  • the contact surfaces of the plunger of the two heating units 15 and 16 in the furnace chamber 11 are brought into contact with the workpiece 20, so that the workpiece 20 is heated over both sides of the workpiece 21 and 22.
  • at least two of the plunger are designed to be vertically movable. This can be at least the upper pressure stamp, which are designed to be vertically movable, while the lower plunger fixed.
  • a workpiece can be placed on the contact surfaces of the lower plunger after the upper plunger were previously moved upwards. As soon as the workpiece rests, the upper plungers are moved down until they come into contact with the workpiece.
  • At least the upper plunger can be made resilient, so that they can be further lowered vertically after contact with the workpiece in order to apply a spring pressure on the top of the workpiece can.
  • Which pressure stamp movable and which are resilient depends in accordance with the design and execution of the furnace 10, which in turn depends for example on the design of the workpieces.
  • the individual plunger can be controlled separately, so that a uniform contact of all contact surfaces can be achieved to the workpiece, even if the workpiece has elevations and / or depressions.
  • Selective control of individual plungers is also advantageous if the outlines of the workpieces to be heated change, so that the shape of the required heating surface, ie the selection of the applied plunger is to be varied.
  • thermal fluid can be used, for example, monatomic gases such as helium or hydrogen. These gases are characterized by a very high thermal conductivity and thus serve as a good heat conductor in the press nips between the contact surfaces of the plunger and the surfaces of the workpiece 20th
  • the movable plungers are relieved of pressure in a selectable clock frequency and then loaded again.
  • the workpiece 20 can expand accordingly during the heating, so that a high quality of the treated workpieces can be achieved.
  • the furnace 10 For feeding the furnace 10 with workpieces 20, various methods can be used and the furnace 10 is designed accordingly.
  • the width of a heating surface formed by the lower pressure pistons eg, 32, 33, 34
  • this workpiece 20 is transferred from the charging device 40 into the oven chamber 11 can be moved, it is picked up by two forks 41 and 42 and can then be stored in the oven chamber 11 on the lower pressure dies 32, 33 and 34.
  • those plungers can be moved vertically downwards, in the region of which the forks 41 and 42 are located. This is schematically in the supervision of Fig.
  • the oven chamber 11 may be formed so that there is otherwise room for the loading and unloading device 40, 50 to bring the workpiece 20 into position between the upper and lower dies.
  • the workpiece 20 may also be slid horizontally into the oven chamber 11 until it reaches a mark on which the workpiece 20 is aligned to be positioned between the dies of the two heating units. If feeders are used which can place and pick up a workpiece 20 directly on the lower plungers, no further precautions in the oven 10 may be necessary.
  • heat transfer coefficients of> 2,000W / m 2 / K can be achieved, which also different Heating and cooling strategies are possible. It can be implemented cycle times of about 6 seconds, with two ovens can be positioned side by side.
  • the workpiece may first be fully heated to or above austenite temperature with all of the plungers, after which certain areas are then cooled by individual plungers back to a temperature below the austenitic temperature.
  • Last embodiment may require that individual plunger are both heatable, as well as designed to cool. In both cases, these selected plungers are arranged to be in the areas where a different temperature is to be set. In order to obtain certain shapes of these areas, the contact surfaces of these plungers may also have corresponding other outlines than the other plunger.
  • Both the temperature control and the vertical movement of the plunger is preferably carried out by a central control unit of the furnace, which is freely programmable.
  • the plunger itself can be heated by gas or electrically, with an electric heating, for example, can be done inductively via a resistor.
  • Fig. 4 shows a possible embodiment of a lower plunger 32 having an upper contact surface 35.
  • the plunger 32 is cylindrical and is heated by gas burners inside. These gas burners are equipped for example with heat exchangers, which use the heat of the outflowing combustion gas to preheat the incoming gases.
  • the burners are preferably equipped in each plunger with a thermocouple and an external control technology, which ensures, for example, an auto-ignition temperature of about 800 ° C.
  • a thermocouple and an external control technology, which ensures, for example, an auto-ignition temperature of about 800 ° C.
  • one or more separate, intrinsically safe gas burners are provided in the oven chamber 11, which preheat the oven 10 to the autoignition temperature of the plunger. After this ignition process, the furnace chamber 11 can be acted upon with conditioned gas, since the combustion chamber is gas-tight in each plunger separated therefrom.
  • inert gas or dried air can be used to prevent H 2 -Versprödung.
  • different materials can be used for the plungers and in particular for their contact surfaces.
  • hot working steels which can be used as alloyed tool steels for applications in which the surface temperature in use can reach up to 400.degree. C. are suitable.
  • the alloying elements are coordinated so that the hot-work tool steels have sufficient hardness and strength, high heat resistance, hot hardness and wear resistance even at elevated temperatures. So they are suitable as a material for contact surfaces, which are used for heating workpieces up to 400 ° C. This is the case, for example, for light metals, such as aluminum or magnesium workpieces, which are typically heated to temperatures in the range of 230 ° C to 250 ° C.
  • SiC silicon carbide

Claims (13)

  1. Procédé destiné au traitement d'au moins une pièce à usiner (20) dans un four (10), dans lequel la pièce à usiner (20) est chauffée dans une chambre de four (11) du four (10) par au moins deux unités de chauffage (15 ; 16), la pièce à usiner présentant un premier côté de pièce à usiner (21) et un deuxième côté de pièce à usiner (22), et une première unité de chauffage (15) chauffant le premier côté de pièce à usiner (21) de la pièce à usiner (20) et une deuxième unité de chauffage (16) chauffant le deuxième côté de pièce à usiner (22) de la pièce à usiner (20), chaque unité de chauffage (15 ; 16) comprenant au moins deux pistons de compression (30 ; 31 ; 32 ; 33 ; 34) et les surfaces de contact des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) d'une unité de chauffage étant respectivement dans des plans différents en cas de contact avec la pièce à usiner (20), caractérisé en ce que les unités de chauffage (15 ; 16) sont respectivement associées à une pièce à usiner (20) et que les au moins deux pistons de compression (30 ; 31 ; 32 ; 33 ; 34) de chaque unité de chauffage (15, 16) comprennent des surfaces de contact chauffées qui sont agencées côte à côte et orientées pareillement, et en ce que la pièce à usiner (20) est chauffée par établissement d'un contact entre le premier côté (21) de la pièce à usiner (20) et les surfaces de contact des au moins deux pistons de compression (30 ; 31 ) de la première unité de chauffage (15) et également par établissement d'un contact entre le deuxième côté (22) de la pièce à usiner (20) et les surfaces de contact des au moins deux pistons de compression (32 ; 33 ; 34) de la deuxième unité de chauffage (16), les surfaces de contact des pistons de compression (30 ; 31) de la première unité de chauffage (15) étant agencées de manière décalée par rapport aux surfaces de contact des pistons de compression (32 ; 33 ; 34) de la deuxième unité de chauffage (15).
  2. Procédé selon la revendication 1, caractérisé en ce que, avant le chauffage de la pièce à usiner (20), au moins deux des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) sont déplacés verticalement, lesdits pistons étant déplacés d'une position sans contact entre leurs surfaces de contact et les côtés (21 ; 22) des pièces à usiner (20) vers une position avec contact entre leurs surfaces de contact et les côtés (21 ; 22) des pièces à usiner (20).
  3. Procédé selon la revendication 2, caractérisé en ce que la pièce à usiner (20) est introduite horizontalement dans la chambre du four (11) et est posée avec le côté inférieur de la pièce à usiner (22) sur les surfaces de contact des pistons de compression (32 ; 33 ; 34) de l'unité de chauffage inférieure (16) et en ce que les pistons de compression (30 ; 31) de l'unité de chauffage supérieure (15) sont déplacés verticalement vers le bas jusqu'à contact entre les surfaces de contact des pistons de compression (30 ; 31) de l'unité de chauffage supérieure (15) et le côté supérieur (21) de la pièce à usiner (20), tandis que la position des pistons de compression (32 ; 33 ; 34) de l'unité de chauffage inférieure (16) n'est pas modifiée.
  4. Procédé selon la revendication 3, caractérisé en ce que la pièce à usiner (20) est introduite dans la chambre du four (11) au moyen d'un dispositif d'alimentation (40), le dispositif d'alimentation (40) comportant au moins un élément d'alimentation (41 ; 42) sur lequel est posée la pièce à usiner (20) avec son côté inférieur (22), et en ce que sont déplacés verticalement vers le bas les pistons de compression (32 ; 33 ; 34) de l'unité de chauffage inférieure (16) qui se trouvent dans la zone de l'élément d'alimentation (41 ; 42) et en ce que la pièce à usiner (20) est ensuite déposée avec son côté inférieur (22) sur les surfaces de contact des autres pistons de compression de l'unité de chauffage inférieure (16), et en ce que les pistons de compression (32 ; 33 ; 34) préalablement déplacés verticalement vers le bas sont ensuite déplacés verticalement vers le haut jusqu'à ce que leurs surfaces de contact soient en contact avec le côté inférieur (22) de la pièce à usiner (20), et en ce que les pistons de compression (30 ; 31) de l'unité de chauffage supérieure (15) sont déplacés verticalement vers le bas jusqu'à ce que leurs surfaces de contact soient en contact avec le côté supérieur (21) de la pièce à usiner.
  5. Procédé selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce qu'un fluide thermique est introduit respectivement dans une fente de pressage entre les côtés (21 ; 22) des pièces à usiner (20) et les surfaces de contact des pistons de compression (30 ; 31 ; 32 ; 33 ; 34), le fluide thermique étant introduit dans la fente de pressage par l'intermédiaire de moyens intégrés aux pistons de compression (30 ; 31 ; 32 ; 33 ; 34).
  6. Procédé selon l'une ou plusieurs des revendications 1 bis 5, caractérisé en ce que les surfaces de contact des piston de compression (30 ; 31 ; 32 ; 33 ; 34) sont portées à des températures différentes et en ce que la surface de contact d'au moins un piston de compression (30 ; 31 ; 32 ; 33 ; 34) est refroidie.
  7. Four destiné au traitement d'au moins une pièce à usiner (20), comprenant au moins une chambre de four et au moins deux unités de chauffage (15 ; 16) pour chauffer la pièce à usiner (20) dans la chambre du four (11), la pièce à usiner comportant un premier côté de pièce à usiner (21) et un deuxième côté de pièce à usiner (22) et les au moins deux unités de chauffage (15 ; 16) étant agencées de telle manière qu'un premier côté (21) de la pièce à usiner (20) peut être chauffé par la première unité de chauffage respective (15) et que le deuxième côté (22) de la pièce à usiner (20) peut être chauffé par la deuxième unité de chauffage respective (16), chaque unité de chauffage (15 ; 16) comprenant au moins deux pistons de compression (30 ; 31 ; 32 ; 33 ; 34) et les surfaces de contact des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) d'une unité de chauffage étant respectivement dans des plans différents en cas de contact avec la pièce à usiner (20), caractérisé en ce que les au moins deux unités de chauffage (15 ; 16) sont respectivement associées à une pièce à usiner (20) et en ce que chaque unité de chauffage (15 ; 16) comprend au moins deux pistons de compression (30 ; 31 ; 32 ; 33 ; 34) avec des surfaces de contact chauffantes qui sont agencées côte à côte et orientées pareillement, et en ce que la pièce à usiner (20) peut être chauffée dans la chambre du four (11) par établissement d'un contact entre le premier côté (21) de la pièce à usiner (20) et les surfaces de contact des au moins deux pistons de compression (30 ; 31) de la première unité de chauffage (15) et également par établissement d'un contact entre le deuxième côté (22) de la pièce à usiner (20) et les surfaces de contact des au moins deux pistons de compression (32 ; 33) de la deuxième unité de chauffage (16), les surfaces de contact des pistons de compression (30 ; 31) de la première unité de chauffage (15) étant agencées de manière décalée par rapport aux surfaces de contact des pistons de compression (32 ; 33 ; 34) de la deuxième unité de chauffage (15).
  8. Four selon la revendication 7, caractérisé en ce qu'au moins deux des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) sont déplaçables verticalement, des moyens étant prévus pour déplacer ces pistons de compression (30 ; 31 ; 32 ; 33 ; 34) d'une position sans contact entre leurs surfaces de contact et les côtés (21 ; 22) des pièces à usiner (20) vers une position avec contact entre leurs surfaces de contact et les côtés (21 ; 22) des pièces à usiner (20).
  9. Four selon l'une des revendications 7 et 8, caractérisé en ce que les surfaces de contact de plusieurs pistons de compression (30 ; 31 ; 32 ; 33 ; 34) d'une unité de chauffage (15 ; 16) agencés en rangées et en colonnes forment respectivement une surface de chauffage dont les dimensions correspondent au moins aux contours de la pièce à usiner (20), les surfaces de contact des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) d'une unité de chauffage (15 ; 16) pouvant, en cas de contact avec la pièce à usiner (20), être agencées respectivement dans un plan ou dans des plans différents.
  10. Four selon l'une des revendications 7 à 9, caractérisé en ce que les surfaces de contact des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) se présentent sous forme de nids d'abeille.
  11. Four selon l'une ou plusieurs des revendications 7 à 10, caractérisé en ce que les surfaces de contact des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) peuvent être portés à des températures différentes.
  12. Four selon l'une ou plusieurs des revendications 7 à 11, caractérisé en ce que la surface de contact d'au moins un piston de compression (30 ; 31 ; 32 ; 33 ; 34) peut être, au choix, non seulement chauffée, mais aussi refroidie.
  13. Four selon l'une ou plusieurs des revendications 8 à 12, caractérisé en ce qu'au moins deux des pistons de compression (30 ; 31 ; 32 ; 33 ; 34) d'une unité de chauffage (15 ; 16) sont, au choix, déplaçables verticalement.
EP10186516.0A 2010-10-05 2010-10-05 Procédé et four destinés au traitement de pièces à usiner Active EP2439289B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
ES10186516.0T ES2609328T3 (es) 2010-10-05 2010-10-05 Procedimiento y horno para tratar piezas de trabajo
PL10186516T PL2439289T3 (pl) 2010-10-05 2010-10-05 Sposób i piec do obróbki cieplnej przedmiotów obrabianych
EP10186516.0A EP2439289B1 (fr) 2010-10-05 2010-10-05 Procédé et four destinés au traitement de pièces à usiner
US13/877,807 US9840748B2 (en) 2010-10-05 2011-09-29 Process and furnace for treating workpieces
PCT/EP2011/066959 WO2012045647A1 (fr) 2010-10-05 2011-09-29 Procédé et four pour le traitement de pièces
MX2013003767A MX356552B (es) 2010-10-05 2011-09-29 Procedimiento y horno para el tratamiento de piezas de trabajo.
KR1020137011576A KR101869576B1 (ko) 2010-10-05 2011-09-29 워크피스 처리용 가열로 및 그 처리방법
BR112013008194A BR112013008194A2 (pt) 2010-10-05 2011-09-29 processo e forno para o tratamento de pelo menos uma peça em um forno
CN201180048353.3A CN103270178B (zh) 2010-10-05 2011-09-29 用于处理工件的方法和炉子
JP2013532132A JP6158086B2 (ja) 2010-10-05 2011-09-29 ワーク処理方法及び炉

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EP10186516.0A EP2439289B1 (fr) 2010-10-05 2010-10-05 Procédé et four destinés au traitement de pièces à usiner

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EP2439289A1 EP2439289A1 (fr) 2012-04-11
EP2439289B1 true EP2439289B1 (fr) 2016-09-28

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EP (1) EP2439289B1 (fr)
JP (1) JP6158086B2 (fr)
KR (1) KR101869576B1 (fr)
CN (1) CN103270178B (fr)
BR (1) BR112013008194A2 (fr)
ES (1) ES2609328T3 (fr)
MX (1) MX356552B (fr)
PL (1) PL2439289T3 (fr)
WO (1) WO2012045647A1 (fr)

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DE102014110415B4 (de) 2014-07-23 2016-10-20 Voestalpine Stahl Gmbh Verfahren zum Aufheizen von Stahlblechen und Vorrichtung zur Durchführung des Verfahrens
DE102015112812A1 (de) 2015-08-04 2017-02-09 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum bereichsweisen Anlassen von Metallbauteilen
DE102015121842B4 (de) 2015-12-15 2018-11-29 Benteler Automobiltechnik Gmbh Verfahren zum Betreiben einer Temperierstation

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JP6158086B2 (ja) 2017-07-05
KR20140018184A (ko) 2014-02-12
KR101869576B1 (ko) 2018-06-21
CN103270178A (zh) 2013-08-28
ES2609328T3 (es) 2017-04-19
WO2012045647A1 (fr) 2012-04-12
US9840748B2 (en) 2017-12-12
CN103270178B (zh) 2015-01-07
JP2013542324A (ja) 2013-11-21
US20130196275A1 (en) 2013-08-01
MX2013003767A (es) 2013-12-16
BR112013008194A2 (pt) 2016-06-21
EP2439289A1 (fr) 2012-04-11
MX356552B (es) 2018-06-04
PL2439289T3 (pl) 2017-06-30

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