EP2117743B1 - Cooling device for a plate - Google Patents

Cooling device for a plate Download PDF

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Publication number
EP2117743B1
EP2117743B1 EP08716041.2A EP08716041A EP2117743B1 EP 2117743 B1 EP2117743 B1 EP 2117743B1 EP 08716041 A EP08716041 A EP 08716041A EP 2117743 B1 EP2117743 B1 EP 2117743B1
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EP
European Patent Office
Prior art keywords
cooling
board
cooling element
plate
elements
Prior art date
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Not-in-force
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EP08716041.2A
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German (de)
French (fr)
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EP2117743A1 (en
Inventor
Ulrich Salamon
Jens Aspacher
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L Schuler GmbH
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L Schuler GmbH
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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts 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
    • 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
    • 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
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices

Definitions

  • the invention relates to a cooling device for a metal circuit board, according to the preamble of claim 1 (see, for example DE-A1-103 41867 ).
  • circuit board is understood in the following preferably a flat metal sheet, however, the board may already be pre-formed and have a deviating from a planar orientation design. By way of example, it should be assumed that a flat board.
  • the board In so-called press hardening, the board is first heated to a temperature of about 800 ° C to 1000 ° C for the purpose of curing, then placed in the press and formed and kept under the forming or pressing force in the press until the board or the molded component thereof is cooled to a temperature below a predetermined target temperature.
  • the cooling takes a relatively long time. Since the press can not be used during this time, the production of a single Component very time consuming and relatively uneconomical.
  • the invention has for its object to provide a deformation of a metal circuit board, with which a fast and efficient cooling and deformation of the board is achieved.
  • a cooling device for a metal circuit board is to be created, with which the process can be carried out in a simple and space-saving manner.
  • a cooling device having the features of claim 1. It is provided that the board is placed in the cooling device at least on one of its plate surfaces and preferably on its two opposite plate surfaces with a cooling element in direct contact.
  • the invention is based on the basic idea of cooling down the heated board by direct contact of cooling elements, ie by contact cooling.
  • the heated board is inserted between the disassembled cooling elements, whereupon they collide and create preferably from opposite sides of the board over the entire surface and cool them down. It has been found that, on the one hand, a very rapid cooling of the circuit board can be achieved by the direct contact cooling and, moreover, that the space requirement of a corresponding cooling device is relatively low.
  • the cooling device is constructed in the manner of a hydraulic locking device having a first preferably lower cooling element and a second preferably upper cooling element, which are adjustable by means of a hydraulic drive or adjustment between a contracted clamping position and a retracted open position.
  • the board is placed between the cooling elements, whereupon they are moved together so far that the board is held between the cooling elements and preferably clamped.
  • the force exerted by the cooling elements on the board clamping force can be used to form deformations of the board.
  • it is provided to introduce into the board by means of the clamping force of the cooling elements a plastic pre-deformation.
  • the clamping force exerted by the cooling elements on the board is so small that the cooling elements in the board cause no or at most exclusively elastic deformations, so that the board after completion of the cooling process again their original geometry, in particular as a planar board has.
  • the hydraulic adjustment which the cooling elements in direct contact holds with the plate surfaces of the board, so activated that the cooling elements are moved apart and removed the board and can be implemented in the preferably hydraulic press in which the actual forming process is performed.
  • the user preselects the force exerted by the cooling elements on the board clamping force and also the time in which the board is to be clamped between the cooling elements, and the cooling process proceeds accordingly.
  • the actual temperature of the board is detected during the cooling process and the cooling is continued until a predetermined target temperature is reached or fallen below.
  • the comparison between the actual temperature and the target temperature is carried out in a conventional manner in a control device which terminates the cooling process and apart the cooling elements when the target temperature is reached or fallen below.
  • the actual temperature of the board is detected not only at one point, but simultaneously in different areas of the board.
  • adjustable spacers may be provided in the cooling device, which protrude above the lower cooling element in particular upwards and on which the board with distance to the cooling element can be placed.
  • the upper cooling element presses on the upper side of the board, whereby the adjustable spacers are fully inserted into the lower cooling element, so that the board also comes on its underside with the lower cooling element in abutment.
  • the cooling elements are part of a particular hydraulic locking device and can be moved by means of a hydraulic drive or adjusting device relative to each other in the above manner.
  • At least one of the cooling elements and in particular the lower cooling element has adjustable spacers to which the board can be placed at a distance from the cooling element, so that the heated board only comes into contact with the lower cooling element immediately before closing the cooling elements.
  • preferably hydraulically activatable ejector pins can be integrated into the upper cooling element.
  • first cooling element and / or the second cooling element is constructed from a plurality of cooling element parts, wherein the cooling element parts are independently adjustable.
  • a cooling element may be constructed from 6 to 8 cooling element parts, which are arranged next to one another and together form the cooling element.
  • Each cooling element part can be raised and lowered independently of the other cooling element parts via a hydraulic drive, so that the cooling element can adapt to the surface contour of the circuit board to be cooled by corresponding adjustment of the cooling element parts.
  • each cooling element part is assigned its own hydraulic drive, the individual cooling element parts can also exert different clamping forces on the circuit board, in that the hydraulic drives of the cooling element parts are controlled in different ways.
  • the cooling element parts are independently temperature controlled, so that the board can be partially exposed to a different cooling, for example, the thicker board areas to cool more than the thin board areas and in this way approximately simultaneously in the whole board to reach the desired target temperature.
  • cooling is to be understood as a lowering of the actual temperature of the board to the desired target temperature.
  • the cooling elements should have an outlet temperature which is below the target temperature, but the temperature of the cooling elements may be above the ambient temperature.
  • cooling device 10 includes four vertical supports 12, each at the ground E are supported and arranged in the vertices of a rectangle.
  • two adjacent supports 12 are connected at their upper and lower ends via cross members 12a and 12b to form a frame.
  • On the top of each upper cross member 12a is mounted an upwardly projecting fixed piston 22a on which a cylinder 22b is slidably fitted at the upper end.
  • the piston 22a and the cylinder 22b together form a hydraulic adjusting device 11.
  • the two cylinders 22b are fixedly connected to each other via a bridge 17, on the underside of which an upper tool 18 is held.
  • the upper tool 18 comprises an attached to the bridge 17 upper base plate 18a, on the underside of a plate-shaped cooling element 19 is held.
  • a plurality of hydraulic actuators 24 in the form of piston-cylinder units are arranged, each with a the cooling element 19 penetrating ejector pin 25 in conjunction.
  • a table 13 is arranged, which is supported by supports 14 between the vertical supports 12, wherein the supports 14 are height adjustable by means of an adjusting device 23, as indicated by the double arrows B.
  • a lower tool 15 is arranged, which has a lower base plate 15a, on whose upper side a plate-shaped cooling element 16 is arranged.
  • a plurality of hydraulic actuators 20 in the form of piston-cylinder units are integrated, each of which is connected to a cooling element 16 penetrating, pin-shaped spacer 21.
  • the bridge 17 with the upper tool 18 in the direction of the lower tool 15 can be lowered so far (see double arrow A) that a flat, metallic board P between the upper tool 18 and the lower tool 15 and between the corresponding cooling elements 19th and 16 is clamped.
  • the cooling elements 16 and 19 are cooled in a conventional manner and in particular flows through a cooling fluid.
  • the board P which is a flat metal plate of constant thickness in the illustrated embodiment is heated in a not shown, upstream station to a temperature of about 900 ° C and then inserted into the cooling device 10 by placing with its underside on the after above from the cooling element 16 of the lower tool 15 projecting spacer 21 is placed.
  • the board P is held at a distance from the cooling element 16. This condition is in the Figures 1 and 2 shown.
  • the hydraulic adjusting devices 11 are activated, whereby the bridge 17 is lowered with the upper tool 18 until the cooling element 19 of the upper tool 18 comes into contact with the upper side of the board P.
  • the actuators 24 of the upper tool 18 are deactivated, so that the ejector 25 are inserted into the cooling element 19.
  • the board P is pressed from above onto the upper side of the cooling element 16 of the lower tool 15, wherein the spacers 21st be inserted into the cooling element 16.
  • the board P is clamped between the two cooling elements 16 and 19 with little force.
  • the underside of the cooling element 19 of the upper tool 18 facing the circuit board P and the upper side of the cooling element 16 of the lower tool 15 facing the circuit board P are each flat, so that no or at least no permanent deformation of the circuit board occurs when the cooling device 10 is closed.
  • the actual temperature of the board P is detected at several points by means of corresponding sensors and temperature signals are given to a control device, not shown, which opens the cooling device 10 by raising the bridge 17 and the upper tool 18 only when the actual Temperature is below a predetermined target temperature.
  • FIG. 1 a flat plate P is shown which has a constant thickness over its entire surface.
  • FIG. 3 shows a modification of the lower tool 15, in which the cooling element 16 is composed of three juxtaposed cooling element parts 16a, 16b and 16c.
  • Each cooling element part 16a, 16b and 16c is equipped with its own hydraulic drive device 26a, 26b and 26c, whereby the cooling element parts 16a, 16b and 16c can be independently raised and lowered. In this way, it is possible to adjust the cooling element parts 16a, 16b and 16c relative to one another in such a way that a good clamping is achieved even with a printed circuit board with regions of different thicknesses.
  • the upper tool may be formed in a similar manner by the cooling element 19 is formed in a plurality of cooling element parts, each with its own hydraulic drive device.
  • the cooling element 16 is divided into three cooling element parts 16a, 16b and 16c.
  • the cooling element can also be subdivided into a plurality of cooling element parts, wherein a subdivision into 6 to 8 cooling element parts has proven to be expedient, which are arranged in a 2x3 or a 2x4 field.
  • the height variation of the table 13, and thus of the lower tool 15, serves to adjust the position of the upper edge of the lower tool to the transport height of automatic transfer devices, e.g. Grippers or robots to adapt.
  • automatic transfer devices e.g. Grippers or robots to adapt.

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

Description

Die Erfindung betrifft eine Kühlvorrichtung für eine metallene Platine, gemäß dem Oberbegriff des Anspruchs 1 (siehe z.B. DE-A1-103 41867 ).The invention relates to a cooling device for a metal circuit board, according to the preamble of claim 1 (see, for example DE-A1-103 41867 ).

Unter dem Begriff "Platine" wird im Folgenden vorzugsweise ein ebenes Metallblech verstanden, jedoch kann die Platine auch bereits vorverformt sein und eine von einer ebenen Ausrichtung abweichende Gestaltung besitzen. Beispielhaft soll jedoch von einer ebenen Platine ausgegangen werden.The term "circuit board" is understood in the following preferably a flat metal sheet, however, the board may already be pre-formed and have a deviating from a planar orientation design. By way of example, it should be assumed that a flat board.

Es ist seit langem bekannt und üblich, eine metallene Platine in eine hydraulische Presse zwischen ein Oberwerkzeug und ein Unterwerkzeug einzulegen und dann die Werkzeuge gegeneinander zu verfahren und dabei die Platine entsprechend den Formgebungen auf den Formflächen der Werkzeuge umzuformen.It has long been known and customary to insert a metal circuit board in a hydraulic press between an upper tool and a lower tool and then to move the tools against each other while reshaping the board according to the shapes on the mold surfaces of the tools.

Beim sogenannten Presshärten wird die Platine zum Zwecke der Härtung zunächst auf eine Temperatur von ca. 800°C bis 1000°C aufgeheizt, dann in die Presse eingelegt und umgeformt und solange unter der Umform- bzw. Presskraft in der Presse gehalten, bis die Platine bzw. das daraus geformte Bauteil bis auf eine Temperatur unterhalb einer vorgegebenen Zieltemperatur abgekühlt ist. Die Abkühlung dauert jedoch relativ lange. Da die Presse während dieser Zeit nicht weiter benutzt werden kann, ist die Herstellung eines einzelnen Bauteils sehr zeitaufwendig und relativ unwirtschaftlich.In so-called press hardening, the board is first heated to a temperature of about 800 ° C to 1000 ° C for the purpose of curing, then placed in the press and formed and kept under the forming or pressing force in the press until the board or the molded component thereof is cooled to a temperature below a predetermined target temperature. The cooling, however, takes a relatively long time. Since the press can not be used during this time, the production of a single Component very time consuming and relatively uneconomical.

Zur Steigerung der Effizienz des Verfahrens ist es bekannt, die aufgeheizte Platine vor dem Einlegen in die Umformpresse einer Vorkühlung zu unterziehen, indem die Platine durch einen Tunnel geführt wird, in dem sie mit Luft und/oder Inertgas angeblasen und dadurch auf eine Temperatur von ca. 400°C bis 500°C abgekühlt wird. Auf diese Weise ist die Zeit, die die Platine bzw. das umgeformte Bauteil in der Presse verbringen muss, wesentlich verringert, jedoch benötigt ein entsprechender Kühltunnel einen großen Bauraum, da eine relativ lange Kühlstrecke vorgesehen sein muss, um die Bauteile in genannter Weise herunterzukühlen.To increase the efficiency of the process, it is known to precool the heated board prior to insertion into the forming press by passing the board through a tunnel in which it is blown with air and / or inert gas and thereby heated to a temperature of approx 400 ° C to 500 ° C is cooled. In this way, the time that has to spend the board or the formed part in the press, substantially reduced, but a corresponding cooling tunnel requires a large space, since a relatively long cooling distance must be provided to cool down the components in the aforementioned manner.

Der Erfindung liegt die Aufgabe zugrunde, eine Umformung einer metallenen Platine zu schaffen, mit dem eine schnelle und effiziente Kühlung und Umformung der Platine erreicht wird. Darüber hinaus soll eine Kühlvorrichtung für eine metallene Platine geschaffen werden, mit der sich das Verfahren in einfacher und platzsparender Weise ausführen lässt.The invention has for its object to provide a deformation of a metal circuit board, with which a fast and efficient cooling and deformation of the board is achieved. In addition, a cooling device for a metal circuit board is to be created, with which the process can be carried out in a simple and space-saving manner.

Diese Aufgabe wird durch eine Kühlvorrichtung mit den Merkmalen des Anspruchs 1 gelöst. Dabei ist vorgesehen, dass die Platine in der Kühlvorrichtung zumindest auf einer ihrer Plattenflächen und vorzugsweise auf ihren beiden entgegengesetzten Plattenflächen mit einem Kühlelement in direkte Anlage gebracht wird.This object is achieved by a cooling device having the features of claim 1. It is provided that the board is placed in the cooling device at least on one of its plate surfaces and preferably on its two opposite plate surfaces with a cooling element in direct contact.

Die Erfindung geht von der Grundüberlegung aus, die aufgeheizte Platine durch direkte Anlage von Kühlelementen, d.h. durch Kontaktkühlung herunterzukühlen. Die aufgeheizte Platine wird zwischen die auseinandergefahren Kühlelemente eingelegt, woraufhin diese zusammenfahren und sich von entgegengesetzten Seiten vorzugsweise vollflächig an die Platine anlegen und diese herunterkühlen. Es hat sich gezeigt, dass durch die direkte Kontaktkühlung einerseits eine sehr schnelle Abkühlung der Platine zu erreichen ist und dass darüber hinaus der Platzbedarf einer entsprechenden Kühlvorrichtung relativ gering ist.The invention is based on the basic idea of cooling down the heated board by direct contact of cooling elements, ie by contact cooling. The heated board is inserted between the disassembled cooling elements, whereupon they collide and create preferably from opposite sides of the board over the entire surface and cool them down. It has been found that, on the one hand, a very rapid cooling of the circuit board can be achieved by the direct contact cooling and, moreover, that the space requirement of a corresponding cooling device is relatively low.

Vorzugsweise ist die Kühlvorrichtung nach Art einer hydraulischen Zuhaltevorrichtung aufgebaut, die ein 1. vorzugsweise unteres Kühlelement und ein 2. vorzugsweise oberes Kühlelement aufweist, die mittels einer hydraulischen Antriebs- oder Verstellvorrichtung zwischen einer zusammengefahrenen Spannstellung und einer auseinandergefahrenen Offenstellung verstellbar sind. Zum Zwecke der Kühlung wird die Platine zwischen die Kühlelemente gelegt, woraufhin diese soweit zusammengefahren werden, dass die Platine zwischen den Kühlelementen gehalten und vorzugsweise eingespannt ist. Die von den Kühlelementen auf die Platine ausgeübte Spannkraft kann dabei zur Ausbildung von Verformungen der Platine verwendet werden. Insbesondere ist vorgesehen, in die Platine mittels der Spannkraft der Kühlelemente eine plastische Vorverformung einzubringen. Alternativ ist es auch möglich, dass die von den Kühlelementen auf die Platine ausgeübte Spannkraft so gering ist, dass die Kühlelemente in der Platine keine oder allenfalls ausschließlich elastische Verformungen hervorrufen, so dass die Platine nach Beendigung des Kühlvorgangs wieder ihre ursprüngliche Geometrie insbesondere als ebene Platine besitzt.Preferably, the cooling device is constructed in the manner of a hydraulic locking device having a first preferably lower cooling element and a second preferably upper cooling element, which are adjustable by means of a hydraulic drive or adjustment between a contracted clamping position and a retracted open position. For the purpose of cooling, the board is placed between the cooling elements, whereupon they are moved together so far that the board is held between the cooling elements and preferably clamped. The force exerted by the cooling elements on the board clamping force can be used to form deformations of the board. In particular, it is provided to introduce into the board by means of the clamping force of the cooling elements a plastic pre-deformation. Alternatively, it is also possible that the clamping force exerted by the cooling elements on the board is so small that the cooling elements in the board cause no or at most exclusively elastic deformations, so that the board after completion of the cooling process again their original geometry, in particular as a planar board has.

Nach Beendigung des Kühlvorgangs wird die hydraulische Verstellvorrichtung, die die Kühlelemente in direkte Anlage mit den Plattenflächen der Platine hält, so aktiviert, dass die Kühlelemente auseinandergefahren werden und die Platine entnommen und in die vorzugsweise hydraulische Presse umgesetzt werden kann, in der der eigentliche Umformvorgang durchgeführt wird.After completion of the cooling process, the hydraulic adjustment, which the cooling elements in direct contact holds with the plate surfaces of the board, so activated that the cooling elements are moved apart and removed the board and can be implemented in the preferably hydraulic press in which the actual forming process is performed.

In einer möglichen Ausgestaltung des Kühlvorgangs kann vorgesehen sein, dass der Benutzer die von den Kühlelementen auf die Platine ausgeübte Spannkraft und auch die Zeit, in der die Platine zwischen den Kühlelementen eingespannt sein soll, vorwählt und der Kühlvorgang entsprechend abläuft.In a possible embodiment of the cooling process can be provided that the user preselects the force exerted by the cooling elements on the board clamping force and also the time in which the board is to be clamped between the cooling elements, and the cooling process proceeds accordingly.

In bevorzugter Ausgestaltung ist jedoch vorgesehen, dass die IST-Temperatur der Platine während des Kühlvorgangs erfasst und die Kühlung solange fortgeführt wird, bis eine vorgegebenen Zieltemperatur erreicht oder unterschritten ist. Der Vergleich zwischen der IST-Temperatur und der Soll- bzw. Zieltemperatur wird in üblicher Weise in einer Steuervorrichtung vorgenommen, die den Kühlvorgang beendet und die Kühlelemente auseinander fährt, wenn die Zieltemperatur erreicht oder unterschritten ist.In a preferred embodiment, however, it is provided that the actual temperature of the board is detected during the cooling process and the cooling is continued until a predetermined target temperature is reached or fallen below. The comparison between the actual temperature and the target temperature is carried out in a conventional manner in a control device which terminates the cooling process and apart the cooling elements when the target temperature is reached or fallen below.

In bevorzugter Ausgestaltung ist vorgesehen, dass die IST-Temperatur der Platine nicht nur an einer Stelle, sondern gleichzeitig in verschiedenen Bereichen der Platine erfasst wird.In a preferred embodiment it is provided that the actual temperature of the board is detected not only at one point, but simultaneously in different areas of the board.

Um eine definierte Abkühlung der Platine sicherzustellen, sollte diese möglichst gleichzeitig auf ihren beiden Plattenflächen mit dem jeweiligen Kühlelement in Anlage kommen. Um dabei den Wärmeübergang vor dem Aufbau der Spannkraft der Kühlelemente möglichst gering zu halten, ist vorgesehen, dass die Platine vor Beginn des Kühlvorgangs mit Abstand zu den Kühlelementen zwischen diesen gehalten ist und erst beim Zusammenfahren der Kühlelemente mit diesen in Anlage kommt. Zu diesem Zweck können in der Kühlvorrichtung verstellbare Abstandshalter vorgesehen sein, die über insbesondere das untere Kühlelement nach oben herausragen und auf die die Platine mit Abstand zum Kühlelement auflegbar ist. Wenn die Kühlelemente gegeneinander fahren und geschlossen werden, drückt das obere Kühlelement auf die Oberseite der Platine, wodurch die verstellbaren Abstandshalter in das untere Kühlelement vollständig eingeschoben werden, so dass die Platine auch auf ihrer Unterseite mit dem unteren Kühlelement in Anlage kommt.In order to ensure a defined cooling of the board, this should come as possible simultaneously on their two plate surfaces with the respective cooling element in plant. In order to keep the heat transfer before building up the clamping force of the cooling elements as low as possible, it is provided that the board before the start the cooling process is kept at a distance from the cooling elements between them and only comes into contact with them when the cooling elements move together. For this purpose, adjustable spacers may be provided in the cooling device, which protrude above the lower cooling element in particular upwards and on which the board with distance to the cooling element can be placed. When the cooling elements are driven against each other and closed, the upper cooling element presses on the upper side of the board, whereby the adjustable spacers are fully inserted into the lower cooling element, so that the board also comes on its underside with the lower cooling element in abutment.

Die Kühlelemente sind Teil einer insbesondere hydraulischen Zuhaltevorrichtung und können mittels einer hydraulischen Antriebs- oder Verstellvorrichtung relativ zueinander in oben genannter Weise verfahren werden.The cooling elements are part of a particular hydraulic locking device and can be moved by means of a hydraulic drive or adjusting device relative to each other in the above manner.

Vorzugsweise besitzt zumindest eines der Kühlelemente und insbesondere das untere Kühlelement verstellbare Abstandshalter, auf die die Platine mit Abstand zum Kühlelement auflegbar ist, so dass die aufgeheizte Platine erst unmittelbar vor dem Schließen der Kühlelemente mit dem unteren Kühlelement in Anlage kommt.Preferably, at least one of the cooling elements and in particular the lower cooling element has adjustable spacers to which the board can be placed at a distance from the cooling element, so that the heated board only comes into contact with the lower cooling element immediately before closing the cooling elements.

Nach Beendigung des Kühlvorgangs kann es vorkommen, dass die Platine am oberen Kühlelement haften bleibt und beim Auseinanderfahren der Kühlelemente mit angehoben wird. Um die Platine in diesem Fall vom oberen Kühlelement zu lösen, können in das obere Kühlelement vorzugsweise hydraulisch aktivierbare Auswerferstifte integriert sein.After completion of the cooling process, it may happen that the board sticks to the upper cooling element and is lifted when moving apart of the cooling elements with. Around To release the board in this case from the upper cooling element, preferably hydraulically activatable ejector pins can be integrated into the upper cooling element.

Neben Platinen, die über ihre Fläche eine zumindest annähernd konstante Dicke aufweisen, sind auch Platinen bekannt, die über ihre Fläche Bereiche unterschiedlicher Dicke aufweisen und als "Tailored Blanks" oder "Patchwork Blanks" bezeichnet werden. Wenn derartige Platinen zwischen Kühlelementen eingespannt werden, die jeweils auf ihrer der Platine zugewandten Oberfläche eben ausgebildet sind, steht die Platine nur in den dickeren Bereichen mit den Kühlelementen in Anlage, so dass eine ungleichmäßige Kühlung gegeben ist. Um auch eine Platine mit einer über die Fläche variierenden Dicke zuverlässig und effizient kühlen zu können, wird nach der Erfindung vorgesehen, dass das 1. Kühlelement und/oder das 2. Kühlelement aus mehreren Kühlelementteilen aufgebaut ist, wobei die Kühlelementteile unabhängig voneinander verstellbar sind. Beispielsweise kann ein Kühlelement aus 6 bis 8 Kühlelementteilen aufgebaut sein, die nebeneinander angeordnet sind und zusammen das Kühlelement bilden. Jedes Kühlelementteil ist über einen hydraulischen Antrieb unabhängig von den anderen Kühlelementteilen anhebbar und absenkbar, so dass sich das Kühlelement durch entsprechende Verstellung der Kühlelementteile an die Oberflächenkontur der zu kühlenden Platine anpassen kann.In addition to blanks which have an at least approximately constant thickness over their surface, blanks are also known which have areas of different thickness over their surface and are referred to as "tailored blanks" or "patchwork blanks". If such boards are clamped between cooling elements, which are each formed flat on their surface facing the board, the board is only in the thicker areas with the cooling elements in abutment, so that uneven cooling is given. In order to be able to reliably and efficiently cool a board with a thickness varying over the area, it is provided according to the invention that the first cooling element and / or the second cooling element is constructed from a plurality of cooling element parts, wherein the cooling element parts are independently adjustable. For example, a cooling element may be constructed from 6 to 8 cooling element parts, which are arranged next to one another and together form the cooling element. Each cooling element part can be raised and lowered independently of the other cooling element parts via a hydraulic drive, so that the cooling element can adapt to the surface contour of the circuit board to be cooled by corresponding adjustment of the cooling element parts.

Da jedem Kühlelementteil ein eigener hydraulischer Antrieb zugeordnet ist, können die einzelnen Kühlelementteile auch unterschiedliche Spannkräfte auf die Platine ausüben, indem die hydraulischen Antriebe der Kühlelementteile in unterschiedlicher Weise angesteuert werden.Since each cooling element part is assigned its own hydraulic drive, the individual cooling element parts can also exert different clamping forces on the circuit board, in that the hydraulic drives of the cooling element parts are controlled in different ways.

Darüber hinaus kann in Weiterbildung vorgesehen sein, dass die Kühlelementteile auch unabhängig voneinander temperierbar sind, so dass die Platine bereichsweise einer unterschiedlichen Kühlung ausgesetzt werden kann, um beispielsweise die dickeren Platinenbereiche stärker zu kühlen als die dünnen Platinenbereiche und um auf diese Weise annähernd gleichzeitig in der ganzen Platine die gewünschte Zieltemperatur zu erreichen.In addition, it can be provided in a development that the cooling element parts are independently temperature controlled, so that the board can be partially exposed to a different cooling, for example, the thicker board areas to cool more than the thin board areas and in this way approximately simultaneously in the whole board to reach the desired target temperature.

Unter dem Begriff "Kühlen" ist eine Absenkung der IST-Temperatur der Platine auf die gewünschte Zieltemperatur zu verstehen. Zu diesem Zweck sollten die Kühlelemente eine Ausgangstemperatur aufweisen, die unterhalb der Zieltemperatur liegt, wobei die Temperatur der Kühlelemente aber oberhalb der Umgebungstemperatur liegen kann.The term "cooling" is to be understood as a lowering of the actual temperature of the board to the desired target temperature. For this purpose, the cooling elements should have an outlet temperature which is below the target temperature, but the temperature of the cooling elements may be above the ambient temperature.

Weitere Einzelheiten und bevorzugte Merkmale der Erfindung sind aus der folgenden Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung ersichtlich. Es zeigen:

Fig. 1
eine schematische, teilweise geschnitten dargestellte Vorderansicht einer Kühlvorrichtung,
Fig. 2
eine schematische, teilweise geschnitten dargestellte Seitenansicht der Kühlvorrichtung gemäß Figur 1 und
Fig. 3
eine alternative Ausgestaltung des unteren Kühlelementes.
Further details and preferred features of the invention will become apparent from the following description of an embodiment with reference to the drawings. Show it:
Fig. 1
a schematic, partially sectioned front view of a cooling device,
Fig. 2
a schematic, partially sectioned side view of the cooling device according to FIG. 1 and
Fig. 3
an alternative embodiment of the lower cooling element.

Eine in den Figuren 1 und 2 dargestellte Kühlvorrichtung 10 umfasst vier vertikale Stützen 12, die jeweils am Erdboden E abgestützt und in den Eckpunkten eines Rechtecks angeordnet sind. Jeweils zwei benachbarte Stützen 12 sind an ihrem oberen und ihrem unteren Ende über Querträger 12a und 12b zu einem Rahmen miteinander verbunden. Auf der Oberseite jedes oberen Querträgers 12a ist ein nach oben ragender feststehender Kolben 22a montiert, auf dem am oberen Ende ein Zylinder 22b verschieblich aufgesetzt ist. Der Kolben 22a und der Zylinder 22b bilden zusammen eine hydraulische Verstellvorrichtung 11. Die beiden Zylinder 22b sind über eine Brücke 17 fest miteinander verbunden, an deren Unterseite ein Oberwerkzeug 18 gehalten ist. Das Oberwerkzeug 18 umfasst eine an der Brücke 17 angebrachte obere Grundplatte 18a, an deren Unterseite ein plattenförmiges Kühlelement 19 gehalten ist. In die Grundplatte 18a sind eine Vielzahl von hydraulischen Betätigungseinrichtungen 24 in Form von Kolben-Zylinder-Einheiten angeordnet, die jeweils mit einem das Kühlelement 19 durchdringenden Auswerferstift 25 in Verbindung stehen.One in the Figures 1 and 2 shown cooling device 10 includes four vertical supports 12, each at the ground E are supported and arranged in the vertices of a rectangle. In each case two adjacent supports 12 are connected at their upper and lower ends via cross members 12a and 12b to form a frame. On the top of each upper cross member 12a is mounted an upwardly projecting fixed piston 22a on which a cylinder 22b is slidably fitted at the upper end. The piston 22a and the cylinder 22b together form a hydraulic adjusting device 11. The two cylinders 22b are fixedly connected to each other via a bridge 17, on the underside of which an upper tool 18 is held. The upper tool 18 comprises an attached to the bridge 17 upper base plate 18a, on the underside of a plate-shaped cooling element 19 is held. In the base plate 18 a, a plurality of hydraulic actuators 24 in the form of piston-cylinder units are arranged, each with a the cooling element 19 penetrating ejector pin 25 in conjunction.

Im unteren Bereich der Kühlvorrichtung 10 ist ein Tisch 13 angeordnet, der über Stützen 14 zwischen den vertikalen Stützen 12 abgestützt ist, wobei die Stützen 14 mittels einer Einstellvorrichtung 23 höhenverstellbar sind, wie es durch die Doppelpfeile B angedeutet ist. Auf der Oberseite des Tisches 13 unterhalb des Oberwerkzeugs 18 ist ein Unterwerkzeug 15 angeordnet, das eine untere Grundplatte 15a aufweist, auf deren Oberseite ein plattenförmiges Kühlelement 16 angeordnet ist. In die Grundplatte 15a sind eine Vielzahl von hydraulischen Betätigungseinrichtungen 20 in Form von Kolben-Zylinder-Einheiten integriert, die jeweils mit einem das Kühlelement 16 durchdringenden, stiftförmigen Abstandshalter 21 verbunden sind.In the lower region of the cooling device 10, a table 13 is arranged, which is supported by supports 14 between the vertical supports 12, wherein the supports 14 are height adjustable by means of an adjusting device 23, as indicated by the double arrows B. On the upper side of the table 13 below the upper tool 18, a lower tool 15 is arranged, which has a lower base plate 15a, on whose upper side a plate-shaped cooling element 16 is arranged. In the base plate 15a, a plurality of hydraulic actuators 20 in the form of piston-cylinder units are integrated, each of which is connected to a cooling element 16 penetrating, pin-shaped spacer 21.

Durch Aktivierung der hydraulischen Verstellvorrichtungen 11 kann die Brücke 17 mit dem Oberwerkzeug 18 in Richtung des Unterwerkzeugs 15 soweit abgesenkt werden (siehe Doppelpfeil A), dass eine ebene, metallene Platine P zwischen dem Oberwerkzeug 18 und dem Unterwerkzeug 15 bzw. zwischen den entsprechenden Kühlelementen 19 und 16 eingespannt ist.By activation of the hydraulic adjusting devices 11, the bridge 17 with the upper tool 18 in the direction of the lower tool 15 can be lowered so far (see double arrow A) that a flat, metallic board P between the upper tool 18 and the lower tool 15 and between the corresponding cooling elements 19th and 16 is clamped.

Die Kühlelemente 16 und 19 sind in an sich bekannter Weise gekühlt und insbesondere von einem Kühlfluid durchflossen.The cooling elements 16 and 19 are cooled in a conventional manner and in particular flows through a cooling fluid.

Im Folgenden wird die Funktionsweise der Kühlvorrichtung 10 erläutert. Die Platine P, die im dargestellten Ausführungsbeispiel eine ebene metallene Platte konstanter Dicke ist, wird in einer nicht dargestellten, vorgeschalteten Station auf eine Temperatur von ca. 900°C erwärmt und anschließend in die Kühlvorrichtung 10 eingelegt, indem sie mit ihrer Unterseite auf die nach oben aus dem Kühlelement 16 des Unterwerkzeugs 15 hervorstehenden Abstandshalter 21 aufgelegt wird. Die Platine P ist dabei mit Abstand zu dem Kühlelement 16 gehalten. Dieser Zustand ist in den Figuren 1 und 2 dargestellt.In the following, the operation of the cooling device 10 will be explained. The board P, which is a flat metal plate of constant thickness in the illustrated embodiment is heated in a not shown, upstream station to a temperature of about 900 ° C and then inserted into the cooling device 10 by placing with its underside on the after above from the cooling element 16 of the lower tool 15 projecting spacer 21 is placed. The board P is held at a distance from the cooling element 16. This condition is in the Figures 1 and 2 shown.

Anschließend werden die hydraulischen Verstellvorrichtungen 11 aktiviert, wodurch sich die Brücke 17 mit dem Oberwerkzeug 18 absenkt, bis das Kühlelement 19 des Oberwerkzeugs 18 mit der Oberseite der Platine P in Anlage kommt. Die Betätigungseinrichtungen 24 des Oberwerkzeugs 18 sind dabei deaktiviert, so dass die Auswerferstifte 25 in das Kühlelement 19 eingeschoben werden.Subsequently, the hydraulic adjusting devices 11 are activated, whereby the bridge 17 is lowered with the upper tool 18 until the cooling element 19 of the upper tool 18 comes into contact with the upper side of the board P. The actuators 24 of the upper tool 18 are deactivated, so that the ejector 25 are inserted into the cooling element 19.

Bei einer weiteren Absenkung des Oberwerkzeugs 18 wird die Platine P von oben auf die Oberseite des Kühlelementes 16 des Unterwerkzeugs 15 gedrückt, wobei die Abstandshalter 21 in das Kühlelement 16 eingeschoben werden. In diesem geschlossenen Zustand der Kühlvorrichtung 10 ist die Platine P zwischen den beiden Kühlelementen 16 und 19 mit geringer Kraft eingespannt. Die der Platine P zugewandte Unterseite des Kühlelementes 19 des Oberwerkzeugs 18 und die der Platine P zugewandte Oberseite des Kühlelementes 16 des Unterwerkzeugs 15 sind jeweils eben ausgebildet, so dass beim Schließen der Kühlvorrichtung 10 keine oder zumindest keine bleibende Verformung der Platine auftritt.In a further lowering of the upper tool 18, the board P is pressed from above onto the upper side of the cooling element 16 of the lower tool 15, wherein the spacers 21st be inserted into the cooling element 16. In this closed state of the cooling device 10, the board P is clamped between the two cooling elements 16 and 19 with little force. The underside of the cooling element 19 of the upper tool 18 facing the circuit board P and the upper side of the cooling element 16 of the lower tool 15 facing the circuit board P are each flat, so that no or at least no permanent deformation of the circuit board occurs when the cooling device 10 is closed.

Während des Kühlvorgangs wird die IST-Temperatur der Platine P an mehreren Stellen mittels entsprechender Sensoren erfasst und es werden Temperatursignale an eine nicht dargestellte Steuervorrichtung gegeben, die die Kühlvorrichtung 10 durch Hochfahren der Brücke 17 und des Oberwerkzeugs 18 erst dann öffnet, wenn die IST-Temperatur unterhalb einer vorgegebenen Zieltemperatur liegt.During the cooling process, the actual temperature of the board P is detected at several points by means of corresponding sensors and temperature signals are given to a control device, not shown, which opens the cooling device 10 by raising the bridge 17 and the upper tool 18 only when the actual Temperature is below a predetermined target temperature.

Es kann vorkommen, dass die Platine P beim Öffnen der Kühlvorrichtung 10 an der Unterseite des Kühlelementes 19 des Oberwerkzeugs 18 haften bleibt und mit diesem angehoben wird. In diesem Fall werden die Betätigungseinrichtungen 24 der Auswerferstifte 21 aktiviert, die die Platine P von dem Oberwerkzeug 18 lösen.It may happen that the board P adheres to the opening of the cooling device 10 on the underside of the cooling element 19 of the upper tool 18 and is raised with this. In this case, the actuators 24 of the ejector pins 21 are activated, which release the board P from the upper tool 18.

In Figur 1 ist eine ebene Platte P gezeigt, die über ihre gesamte Fläche eine konstante Dicke aufweist. Es sind jedoch auch Platinen bekannt, die Bereiche unterschiedlicher Dicke aufweisen und deren Einspannung bei Verwendung eines einteiligen, ebenen Kühlelementes unzureichend wäre. Figur 3 zeigt eine Abwandlung des Unterwerkzeugs 15, bei dem das Kühlelement 16 aus drei nebeneinander angeordneten Kühlelementteilen 16a, 16b und 16c aufgebaut ist. Jedes Kühlelementteil 16a, 16b und 16c ist mit einer eigenen hydraulischen Antriebsvorrichtung 26a, 26b und 26c ausgerüstet, wodurch die Kühlelementteile 16a, 16b uns 16c unabhängig voneinander angehoben und abgesenkt werden können. Auf diese Weise ist es möglich, die Kühlelementteile 16a, 16b und 16c zueinander so zu verstellen, dass auch bei einer Platine mit Bereichen unterschiedlicher Dicke eine gute Einspannung erreicht ist.In FIG. 1 a flat plate P is shown which has a constant thickness over its entire surface. However, there are also boards known that have areas of different thickness and their clamping would be insufficient when using a one-piece, flat cooling element. FIG. 3 shows a modification of the lower tool 15, in which the cooling element 16 is composed of three juxtaposed cooling element parts 16a, 16b and 16c. Each cooling element part 16a, 16b and 16c is equipped with its own hydraulic drive device 26a, 26b and 26c, whereby the cooling element parts 16a, 16b and 16c can be independently raised and lowered. In this way, it is possible to adjust the cooling element parts 16a, 16b and 16c relative to one another in such a way that a good clamping is achieved even with a printed circuit board with regions of different thicknesses.

Obwohl in Figur 3 nur eine Abwandlung des Unterwerkzeugs dargestellt ist, kann alternativ oder zusätzlich dazu auch das Oberwerkzeug in gleichartiger Weise ausgebildet sein, indem dessen Kühlelement 19 in mehrere Kühlelementteile mit jeweils einer eigenen hydraulischen Antriebsvorrichtung ausgebildet ist.Although in FIG. 3 only a modification of the lower tool is shown, alternatively or additionally, the upper tool may be formed in a similar manner by the cooling element 19 is formed in a plurality of cooling element parts, each with its own hydraulic drive device.

In Figur 3 ist das Kühlelement 16 in drei Kühlelementteile 16a, 16b und 16c unterteilt. Das Kühlelement kann auch in mehrere Kühlelementteile unterteilt sein, wobei sich eine Unterteilung in 6 bi s8 Kühlelementteile als sinnvoll erwiesen hat, die in einem 2x3- oder einem 2x4-Feld angeordnet sind.In FIG. 3 the cooling element 16 is divided into three cooling element parts 16a, 16b and 16c. The cooling element can also be subdivided into a plurality of cooling element parts, wherein a subdivision into 6 to 8 cooling element parts has proven to be expedient, which are arranged in a 2x3 or a 2x4 field.

Die Höhenvertellung des Tisches 13 und somit des Unterwerkzeugs 15 dient dazu, die Position der Oberkante des Unterwerkzeugs an die Transporthöhe von automatischen Umsetzeinrichtungen, z.B. Greifvorrichtungen oder Robotern, anpassen zu können.The height variation of the table 13, and thus of the lower tool 15, serves to adjust the position of the upper edge of the lower tool to the transport height of automatic transfer devices, e.g. Grippers or robots to adapt.

Claims (6)

  1. Cooling apparatus (10) for a metal plate (P), having a first cooling element (16) and a second cooling element (19), which can be adjusted relative one another and between which the plate (P) can be clamped in, characterized in that the first cooling element (16) and/or the second cooling element (19) are/is constructed from a plurality of cooling-element parts (16a, 16b, 16c), wherein the cooling-element parts (16a, 16b, 16c) can be adjusted independently of one another.
  2. Cooling apparatus according to Claim 1, characterized in that different clamping forces can be introduced into the plate (P) by the cooling-element parts (16a, 16b, 16c).
  3. Cooling apparatus according to Claim 1 or 2, characterized in that the temperatures of the cooling-element parts (16a, 16b, 16c) can be adjusted independently of one another.
  4. Cooling apparatus according to one of Claims 1 to 3, characterized in that the cooling elements (16, 19) can be adjusted hydraulically.
  5. Cooling apparatus according to one of Claims 1 to 4, characterized in that at least one of the cooling elements (16) has adjustable spacers (21), on which the plate (P) can be positioned at a distance from the cooling element (16).
  6. Cooling apparatus according to one of Claims 1 to 5, characterized by at least one temperature sensor, which can sense the ACTUAL temperature of the plate (P) during the cooling operation.
EP08716041.2A 2007-03-01 2008-02-26 Cooling device for a plate Not-in-force EP2117743B1 (en)

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DE102007009937A DE102007009937A1 (en) 2007-03-01 2007-03-01 Metal plate shaping heats the plate to a given temperature, which is then clamped between two cooling elements before pressing
PCT/EP2008/001501 WO2008104360A1 (en) 2007-03-01 2008-02-26 Method for shaping a blank, and cooling device for a blank

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EP2117743B1 true EP2117743B1 (en) 2015-08-05

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JP (1) JP5329438B2 (en)
KR (1) KR101495139B1 (en)
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US8272245B2 (en) 2012-09-25
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CN101674901A (en) 2010-03-17
EP2117743A1 (en) 2009-11-18

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