EP3169462B1 - Outil de formage pour la production de composants formés à chaud - Google Patents

Outil de formage pour la production de composants formés à chaud Download PDF

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Publication number
EP3169462B1
EP3169462B1 EP15732708.1A EP15732708A EP3169462B1 EP 3169462 B1 EP3169462 B1 EP 3169462B1 EP 15732708 A EP15732708 A EP 15732708A EP 3169462 B1 EP3169462 B1 EP 3169462B1
Authority
EP
European Patent Office
Prior art keywords
forming die
die
tool
forming
descaling
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
EP15732708.1A
Other languages
German (de)
English (en)
Other versions
EP3169462A1 (fr
Inventor
Jürgen Becker
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3169462A1 publication Critical patent/EP3169462A1/fr
Application granted granted Critical
Publication of EP3169462B1 publication Critical patent/EP3169462B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • 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
    • B21D22/20—Deep-drawing
    • B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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
    • C21D2221/00—Treating localised areas of an article

Definitions

  • the invention relates to a mold for the production of hot-formed components, according to the preamble of claim 1.
  • the comfort for the vehicle occupants increases increasingly through the use of special equipment. These include many electromechanical components such as sensors, motors, actuators, and serve the driver to facilitate the driving task.
  • the vehicle weight increases as the comfort increases, so does the vehicle weight.
  • the structural components of the body are not only significantly involved in the stability of the vehicle, but also play a crucial role in safety in the event of a crash.
  • Hot forming processes are also described in the literature as mold hardening or press hardening.
  • a board is first heated in an oven to a temperature above the austenitizing temperature of the steel and then simultaneously formed and cooled in a tool, i.e., cooled. form-hardened.
  • a finished molded and trimmed steel component is first produced from a board by cold forming. This is then heated in a heating plant to a temperature above the austenitizing temperature of the steel and then mold hardened in a tool by rapid cooling.
  • the blank or an already finished and trimmed steel part is thermo-mechanically deformed following heating to the austenitizing temperature in the tool, with thermo-mechanical forming preferably at a temperature above the final austinitization temperature Ac3 (about 830 ° C) between 900 and 1100 ° C takes place.
  • the cooling of the formed workpieces by means of a cooling unit, which is located in a closed tool body.
  • the generic patent DE 19723655 B4 shows a method for producing steel sheet products by heating a measured steel sheet, hot working the steel sheet in a pair of tools, hardening the formed product by rapidly cooling from an austenitic temperature while still being held in the pair of tools, and then working the product. Due to the thermal reaction between the furnace atmosphere and the material of the component, which may be coated or uncoated, scale formation occurs on the surface of the component. This scale formation can already occur in the oven or after the oven. Even a protective gas atmosphere in the oven can not prevent the scale formation but only curb within certain limits. In the hot forming tool, these scale deposits lead to massive wear of the tool, in particular the inserts with integrated cooling systems, which are involved in the shaping of the component.
  • the hot forming plant has to be stopped again and again in order to remove the scale deposits from the tool cavities of the hot forming tool by means of compressed air or dry ice. There is a risk that this will lead to contamination of the entire system and to a health impairment of the employees.
  • the invention teaches a mold for the production of hot-formed components, in particular sheet metal parts made of steel, aluminum, magnesium or a combination thereof, with a tool lower part and a tool shell, which are relatively movable to each other and formed with corresponding active surfaces for shaping the component are, wherein at least the active surface of a tool part is formed at least partially coolable.
  • the molding tool may further comprise at least one descaling device. Due to the descaling device, scale and scale dust are removed from the heated sheet-metal part directly at the point of origin or immediately before hot-forming. This avoids the formation of deposits in the mold or on its active surfaces.
  • the descaling device can be designed as a suction and blow-out device. These specially designed blow-suction nozzles generate an air flow which is directed in the direction of the sheet-metal part. Upon impact of the air flow on the sheet metal part of the scale is whirled, or separated from the sheet metal part. By a second air flow, which is also generated by the descaling, the whirled scale is sucked.
  • the extracted scale can then be fed to reprocessing plants, big bags, briquetting presses, containers or the like. As a result, a particularly sustainable manufacturing process can be realized.
  • the descaling device can be designed as an air curtain.
  • Air curtains are also known as air curtains and work on the basis of a combination of blowing and suction.
  • the descaling device can also be designed as a dry ice cleaning integrated in the tool.
  • the sheet metal part are radiated by means of dry ice, for the removal of scale.
  • the descaling device can be arranged in the direction of insertion of the component in front of the molding tool. This offers the advantage that the scale is removed even before the introduction of the sheet metal part in the thermoforming mold and thus the risk of contamination of the mold is minimized.
  • the mold may also comprise a plurality of descaling devices, which are arranged around the active surface of the tool.
  • a blowing and suction takes place at several points of the mold.
  • the descaling devices are circumferentially positioned around the mold.
  • the sheet metal part can be freed of scale formation from several sides at the same time.
  • the descaling devices can also be directed directly onto the molding tool, so that the flows generated thereby also act directly on the active surface of the mold halves. If a transfer of scale from the sheet metal part has taken place on the mold, so that the scale can be removed again and thereby the mold to be cleaned.
  • the descaling device can be arranged on the upper tool part or on the lower tool part or on both tool parts.
  • the descaling device may be intermittently operable, being turned off at least in a fully closed state of the molding tool and turned on in a fully opened state of the molding tool.
  • the blowing and suction is controlled such that only if the sheet metal part or the effective surface of the mold can be reached by the currents also an energy-consuming cleaning is performed.
  • This increases the sustainability of the manufacturing process.
  • the descaling device can be switched on after each forming operation or after a predetermined number of forming operations. This offers the advantage that deposits can be counteracted by tinder preventive.
  • the descaling device can be activated as a function of the tool state. Blowing and suction of scale can be controlled by scale of tool contamination by scale.
  • the degree of contamination can be detected by a camera system of the tool.
  • air ducts can be provided in at least one tool part, via which air can be applied to the active surface of the tool part. These fine air ducts can assist the blow-out process so that a particularly thorough scale removal can be ensured.
  • Fig. 1 shows a mold 10, which is used in presses for hot forming sheet metal blanks to sheet metal components 17.
  • the mold 10 has a lower mold half 12u, which rests on a base plate 11.
  • the lower mold half 12u cooperates with an upper mold half 12o.
  • the mutually facing active surfaces of the upper mold half 12 o and the lower mold half 12 u are formed correspondingly, so that they act as a die and die of a press tool.
  • the tool half 12o is designed as a punch and the tool half 12u as a die.
  • the upper and lower mold halves can be reversed in their arrangement, such that the upper tool acts as a die and the lower tool acts as a punch.
  • the upper mold half 12o and the lower mold half 12u are movable relative to each other.
  • mold halves 12o, 12u can be moved apart and again together.
  • a piece of sheet metal or a sheet metal blank is inserted between the mold halves, and is encompassed and shaped by the active surfaces.
  • the in Fig. 1 shown state corresponds to an open position of the tool halves 12u, 12o in a forming process in which the component 17 is completely reshaped and can be removed from the mold 10.
  • an insert 13 in which a cooling system having a plurality of cooling channels or cooling lines 14 is integrated.
  • the use of such inserts 13 offers, on the one hand, the advantage that different component contours can be embossed with a lower forming tool 12u in that the insert 13 can be replaced in accordance with the desired component shape.
  • the cooling lines 14 extend substantially parallel to the surface of the component 17 and thus also substantially parallel to the effective surface of the Mold halves 12u, 12o. The cooling lines 14 thus follow the component surface at a certain distance in the insert 13 of the lower mold half 12u. With the cooling channels a targeted cooling of the component 17 in the region of the cooling channels 14 is made possible, so that in this area a microstructure is realized in the component, with high mechanical strength.
  • the sheet metal part is in FIG. 1 introduced from the left into the thermoforming mold and thus cleaned before introduction between the tool halves 12u, 12o of scale. If one of the descaling devices 18, 18 'is designed as an air curtain, it can extend over the entire length of the sheet metal part such that when the sheet metal part is introduced, it is completely cleaned of scale.
  • FIG. 2 is a mold shown with a to the in FIG. 1 illustrated analog structure.
  • the mold halves 12u, 12o have air ducts 15 that are fluidly connected to a manifold system 16. Compressed air is thus introduced via the connection system 16, and distributed to the air lines 15.
  • At the in Fig. 1 upper end of the air channels 15 are outlets or openings provided, from which the compressed air flows into the area between the mold halves 12u and 12o.
  • These air ducts 15 can be manufactured in any desired pitch and diameter and support the action of the descaling device 18, 18 '.
  • FIG. 2 shows a closed position of the mold 10. In this state, the sheet metal part 17 is hardened. The descaling device 18 is switched off.
  • cooling channels 14 wherein air channels 15 are provided in the tool upper part 12o and the tool lower part 12u.
  • the arrangement of the cooling system i. the connection system 16 and the cooling channels 15 may also be arranged only in one of the tool halves 12u, 12o.
  • cooling channels 14 may be provided both in the upper tool half 12o and in the lower tool half 12u.
  • FIG. 3 shows a plan view of a lower tool part 12u of the mold 10.
  • the descaling devices 18 are formed as individual suction and blow-out devices and arranged essentially around the effective surface of the tool lower part 12u.
  • the descaling devices 18 are connected via a common supply and discharge system 19.
  • air ducts 15 can also in the embodiment according to FIG. 3 be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (10)

  1. Outil de moulage (10) permettant l'obtention de pièces (17) mises en forme à chaud, en particulier de pièces moulées en tôle d'acier, d'aluminium, de magnésium ou d'une combinaison de ces éléments comprenant une partie d'outil inférieure (12u) et une partie d'outil supérieure (12o) qui sont mobiles l'une par rapport à l'autre, et sont réalisées avec des surfaces actives correspondantes pour permettre la mise en oeuvre de la pièce (17), au moins la surface active de l'une des parties d'outil (12u, 12o) étant réalisée pour pouvoir être refroidie au moins par segments,
    caractérisé par
    au moins un dispositif de décalaminage (18, 18').
  2. Outil de moulage conforme à la revendication 1,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') est réalisé sous la forme d'un dispositif d'aspiration et d'évacuation par soufflage.
  3. Outil de moulage conforme à la revendication 1 ou 2,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') est réalisé sous la forme d'un rideau d'air.
  4. Outil de moulage conforme à l'une des revendications 1 à 3,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') est monté à l'avant de l'outil de moulage dans la direction de mise en place de la pièce (17).
  5. Outil de moulage conforme à l'une des revendications 1 à 3,
    caractérisé en ce qu'
    il comporte plusieurs dispositifs de décalaminage (18, 18') qui sont montés autour de la surface active de l'outil.
  6. Outil de moulage conforme à l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') est monté sur la partie supérieure (12o) de l'outil ou sur la partie inférieure (12u) de l'outil ou sur les deux parties (12u, 12o) de l'outil.
  7. Outil de moulage conforme à l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') peut fonctionner de manière intermittente, et est débranché au moins à l'état totalement fermé de l'outil de moulage et est branché à l'état totalement ouvert de l'outil de moulage.
  8. Outil de moulage conforme à la revendication 7,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') est branché après chaque processus de mise en forme ou après un nombre prédéfini de processus de mise en forme.
  9. Outil de moulage conforme à la revendication 8,
    caractérisé en ce que
    le dispositif de décalaminage (18, 18') est activé en fonction de l'état de l'outil.
  10. Outil de moulage conforme à l'une des revendications précédentes,
    caractérisé en ce qu'
    il est prévu dans au moins l'une des parties d'outil (12u, 12o) des canaux d'air par l'intermédiaire desquels de l'air peut être introduit sur la surface active de la partie d'outil.
EP15732708.1A 2014-07-18 2015-06-30 Outil de formage pour la production de composants formés à chaud Active EP3169462B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014214027.7A DE102014214027A1 (de) 2014-07-18 2014-07-18 Formwerkzeug zur Herstellung von warmumgeformten Bauteilen
PCT/EP2015/064853 WO2016008720A1 (fr) 2014-07-18 2015-06-30 Outil de formage pour la production de composants formés à chaud

Publications (2)

Publication Number Publication Date
EP3169462A1 EP3169462A1 (fr) 2017-05-24
EP3169462B1 true EP3169462B1 (fr) 2018-05-16

Family

ID=53496717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15732708.1A Active EP3169462B1 (fr) 2014-07-18 2015-06-30 Outil de formage pour la production de composants formés à chaud

Country Status (5)

Country Link
US (1) US20170072447A1 (fr)
EP (1) EP3169462B1 (fr)
CN (1) CN106232255B (fr)
DE (1) DE102014214027A1 (fr)
WO (1) WO2016008720A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114850271B (zh) * 2022-03-10 2024-03-22 河钢股份有限公司 镀层热成形钢去除表面氧化层的方法以及热成形方法

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JPS57160523A (en) * 1981-03-30 1982-10-02 Fujitsu Kiden Ltd Manufacture of different kinds of metallic plate products
SE9602257L (sv) 1996-06-07 1997-12-08 Plannja Hardtech Ab Sätt att framställa ståldetalj
DE102005025026B3 (de) * 2005-05-30 2006-10-19 Thyssenkrupp Steel Ag Verfahren zum Herstellen eines Metallbauteils mit aneinander angrenzenden Abschnitten unterschiedlicher Materialeigenschaften
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Also Published As

Publication number Publication date
WO2016008720A1 (fr) 2016-01-21
CN106232255A (zh) 2016-12-14
US20170072447A1 (en) 2017-03-16
EP3169462A1 (fr) 2017-05-24
CN106232255B (zh) 2019-11-19
DE102014214027A1 (de) 2016-02-18

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