EP3678803B1 - Procédé de fabrication d'une pièce coulée - Google Patents

Procédé de fabrication d'une pièce coulée Download PDF

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Publication number
EP3678803B1
EP3678803B1 EP18785245.4A EP18785245A EP3678803B1 EP 3678803 B1 EP3678803 B1 EP 3678803B1 EP 18785245 A EP18785245 A EP 18785245A EP 3678803 B1 EP3678803 B1 EP 3678803B1
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EP
European Patent Office
Prior art keywords
workpiece
energy transmission
transmission surface
mold core
mold
Prior art date
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Application number
EP18785245.4A
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German (de)
English (en)
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EP3678803A1 (fr
Inventor
Alois Boindecker
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Fill GmbH
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Fill GmbH
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Publication date
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Publication of EP3678803A1 publication Critical patent/EP3678803A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/005—Removing cores by vibrating or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings

Definitions

  • the invention relates to a method for producing a cast workpiece.
  • a molten metal for example a molten aluminum
  • the term metal melt is understood to mean not only liquid but also thixotropic metal melts.
  • the present invention is based on the object of creating a method in which the economy in the production of cast workpieces is increased and the workpiece is not damaged.
  • a hammer head is placed on a defined energy transfer surface of the workpiece and the hammer head acts on the energy transfer surface, in particular hammered in.
  • the method according to the invention has the surprising advantage that the shattering of the mold core can take place at an increased process temperature and thus the process can be further optimized.
  • an energy transfer surface of the workpiece, on which a hammer head is applied to smash the mold core is defined in advance.
  • the energy transfer surface can thus be designed in such a way that it has a higher strength than the other surfaces or that any deformations on the energy transfer surface can be removed again in subsequent processing steps.
  • Which surface of the workpiece serves as the energy transfer surface can already be determined during the construction of the workpiece or during the simulation of the casting process.
  • tests are carried out to determine which area is best suited as an energy transfer area. It is advantageous if it is specified in a work instruction which surface of the workpiece can or may serve as an energy transfer surface.
  • a surface of the workpiece serves as the energy transfer surface, which surface is processed mechanically, in particular by cutting, in subsequent production steps.
  • the advantage here is that any damage or plastic deformations of the energy transfer surface which are introduced into it during the process of shattering can be removed again in subsequent process steps.
  • a surface of the workpiece which has the greatest surface strength at the time of the shattering of the mold core serves as the energy transfer surface.
  • a surface of the workpiece serves as the energy transfer surface which was arranged during the casting process, in particular during the gravity casting process, in the area of a lower part of the casting mold, in particular in relation to the casting layer on an underside of the workpiece.
  • the energy transfer surface is where the melt is first calmed down.
  • An embodiment is also advantageous, according to which it can be provided that the workpiece is turned through 180 ° after it has been removed from the mold, so that the energy transfer surface lies on the upper side of the workpiece and the workpiece rests on a support table on a support side opposite to the energy transfer surface.
  • the hammer head of the coring hammer can act on the workpiece in the vertical direction from above.
  • the workpiece can be placed on the support table.
  • the workpiece is designed as a cylinder head blank for further processing into a cylinder head for an internal combustion engine, an engine block connection surface of the cylinder head blank serving as the energy transfer surface.
  • an engine block connection surface of the cylinder head blank serving as the energy transfer surface.
  • coring at high temperatures is associated with great economic advantages.
  • Defining the engine block connection surface as an energy transfer surface has the advantage that, on the one hand, the engine block connection surface can be at the bottom during the casting process and, on the other hand, is still milled off in subsequent processing steps.
  • the deformations on the engine block connection surface during the shattering of the core can be kept as low as possible.
  • the introduced deformations can be removed again in subsequent processing steps, so that there are no longer any traces of action on the finished cylinder head.
  • the engine block connection surface of the cylinder head has to be machined anyway in order to obtain a flat surface.
  • Another advantage of using the engine block connection surface as an energy transfer surface is that it is a surface that is flat and has a large surface area. In this way, the force applied can be distributed over a large area, which means that the surface pressure can be kept as low as possible.
  • the energy transfer surface is designed as a flat surface.
  • the advantage here is that the hammer head can also have a flat surface and can therefore rest over the entire surface of the energy transfer surface of the workpiece.
  • an area of an effective area of the hammer head or the load sharing plate, which rests on the energy transfer surface when the mold core is smashed is between 150% and 10%, in particular between 110% and 50%, preferably between 100% and 80% Area of the energy transfer surface is.
  • the advantage here is that the lowest possible surface pressure can be achieved through this surface dimensioning.
  • the workpiece is removed from the mold when the surface temperature of the energy transfer surface is between 440 ° Celsius and 360 ° Celsius.
  • the advantage here is that the workpiece already has sufficient strength at this temperature to be manipulated.
  • the workpiece cools down further during the feeding of the workpiece to a hammer head for smashing the mold core until the energy transfer surface has a surface temperature between 300 ° Celsius and 400 ° Celsius.
  • a workpiece that has a temperature in the specified range on the energy transfer surface already has sufficient strength to be able to act on the energy transfer surface by means of the hammer head.
  • the shattering of the mold core by means of the hammer head takes place at a surface temperature of the energy transfer surface between 300 ° Celsius and 400 ° Celsius, with at least external parts of the mold core being shattered.
  • this processing step only external parts or parts of the mold core close to the edge are shattered, in particular cracked through, and thus fall off the workpiece.
  • the outer surface of the workpiece can be freed from the mold cores, so that the workpiece can cool down more quickly. Even if the external mold cores are not completely removed or knocked off from the workpiece, but only detach themselves from the workpiece surface, the cooling effect can be improved.
  • the hammer head impacts the workpiece for between 1 seconds and 20 seconds.
  • the workpiece is further cooled until the energy transfer surface has a surface temperature between 100 ° Celsius and 200 ° Celsius, in particular between 150 ° Celsius and 200 ° Celsius, and that the workpiece is then again a Hammer head is supplied for smashing the mold core, with the remaining parts of the mold core also being smashed, in particular parts inside the workpiece.
  • a Hammer head is supplied for smashing the mold core, with the remaining parts of the mold core also being smashed, in particular parts inside the workpiece.
  • the workpiece is clamped in a vibrating device and the workpiece is rotated about at least one horizontal axis of rotation while vibrating at the same time.
  • the advantage here is that the mold core can be smashed further by this measure or that the shattered mold core parts can be removed from the workpiece in this process step.
  • a load sharing plate is inserted between the hammer head and the energy transfer surface.
  • the advantage here is that the surface pressure on the energy transfer surface can be kept as low as possible by means of the load sharing plate.
  • a cooling channel is formed in the casting mold, at least in that area in which the energy transfer surface of the workpiece is formed, the workpiece being cooled by means of the cooling channel in the area of the energy transfer surface.
  • the energy transfer surface can be locally cooled after the workpiece has been removed from the casting mold, for example by dipping the energy transfer surface of the workpiece in a cooling liquid.
  • the energy transfer surface can have a high level of strength, and the rest of the workpiece can be kept at a high temperature level.
  • a coring hammer carrier for shattering the mold core of a cast workpiece, the coring hammer carrier having at least one coring hammer with a hammer head. Furthermore, a load sharing plate is provided which can be brought between the hammer head and the workpiece. The advantage here is that the load sharing plate can be used to avoid introducing a high surface pressure on the workpiece.
  • the load sharing plate is coupled to at least two hammer heads of two de-core hammers.
  • the advantage here is that the hammer heads of the two core hammers are coupled to one another by this measure.
  • the load sharing plate is coupled to the hammer heads of the coring hammers in a separable manner.
  • different load sharing plates can be provided for different workpieces, it being possible for the load sharing plates to be selectively exchanged.
  • the contour of the load sharing plate is adapted to the surface contour of the energy transfer surface of the workpiece.
  • the load sharing plate has a flexible surface quality in the area in which it rests on the energy transfer surface of the workpiece. As a result, the load sharing plate can be flexibly adapted to the energy transfer surface of the workpiece.
  • the feeder of the workpiece has the energy transfer surface.
  • this measure can be useful if a sand mold is used as the casting mold.
  • the mold has an insulating effect, so that the workpiece cannot cool down. If the energy transfer surface is selected on the feeder, the sand casting mold can be knocked off the workpiece in order to facilitate the cooling of the workpiece.
  • the hammer head is pressed against the energy transfer surface during the process of smashing the mandrel in such a way that it is constantly in contact with the workpiece even if the energy transfer surface is shifted. In other words, this prevents the hammer head from lifting off the energy transfer surface of the workpiece during the process of shattering the mold core. This can prevent a blow from being exerted on the energy transfer surface of the workpiece and damaging it.
  • the position of the energy transfer surface is shifted in particular when the workpiece is placed on the support table in such a way that an external mold core, which is smashed, rests on the support table. The position of the workpiece is shifted as a result of the shattering of the external mold core.
  • the coring hammer is designed as a hydraulic hammer.
  • the advantage here is that a hydraulic hammer can be controlled in such a way that the hammer head is constantly in contact with the energy transfer surface of the workpiece and there is no impact on the workpiece.
  • the hammer head is constantly pressed against the energy transfer surface of the workpiece with a contact pressure between 100N and 2000N, in particular between 200N and 700N, while the mold core is being smashed.
  • the workpiece is designed as a hollow cylindrical electric motor housing blank for further processing into an electric motor housing, an end face of the hollow cylindrical electric motor housing blank serving as the energy transfer surface.
  • the advantage here is that the end face of the hollow cylindrical electric motor housing blank is subsequently mechanically reworked.
  • the end face can have a comparatively high strength, since it can solidify earlier.
  • the mold core is preferably a structure that is formed from sand and after its removal from the workpiece, cavities or recesses can be formed in the workpiece.
  • the sand of the mold core is given its dimensional stability by means of a binder.
  • the mold core can consist of several parts which can be connected to one another or which can be arranged independently of one another at different points in the casting mold.
  • the mold core is also partially arranged on the outside of the workpiece, or that the mold core partially protrudes outwardly beyond the workpiece.
  • Such an external mold core can be arranged, for example, in the area of the feeder or the sprue.
  • the process step “shattering the mold core” is understood to mean a process step in which the mold core breaks at least partially. This process step does not include removing the mandrel from the workpiece.
  • a cylinder head blank is a cast workpiece from which a cylinder head for an internal combustion engine is manufactured through mechanical post-processing, such as milling.
  • the finished cylinder head is placed on an engine block of the internal combustion engine.
  • the cylinder head therefore has an engine block connection surface which, when installed, optionally rests against the cylinder block with the interposition of the cylinder head gasket.
  • the surface that is used on the cylinder head blank as a raw surface for the engine block connection surface of the cylinder head is referred to as the engine block connection surface of the cylinder head blank.
  • the cylinder head blank thus also has, by definition, an engine block connection surface, this first having to be mechanically processed in order to actually be brought into contact with the engine block.
  • the casting position of the workpiece is understood to mean that spatial orientation or position in which the workpiece lies as long as it is received in the casting mold. This applies to gravity casting processes in which the mold is not moved. In the case of tilt casting or rotation casting, the casting position is understood to be the end position of the casting mold.
  • a molten metal 2 is introduced into a casting mold 3, for example a mold.
  • the casting mold 3 is designed as a two-part casting mold 3 with a lower part 4 and an upper part 5, which are detachably connected to one another.
  • the mold 3 can also have more than two parts.
  • a cooling channel 15 is formed in the casting mold 3, in particular in the lower part 4 or in the upper part 5, in which a cooling liquid is guided.
  • the cooling channel 15 is formed at least in that region of the casting mold 3 in which an energy transfer surface 12 is to be provided on the workpiece 1.
  • a mold core 7 is inserted into the casting mold 3 and, together with the inner walls of the lower part 4 and the upper part 5, delimits a mold cavity 6.
  • the metal melt 2, which is particularly preferably an aluminum melt, is introduced into the mold cavity 6.
  • all known casting methods can be used as the method for introducing the molten metal.
  • the process steps according to the invention have proven themselves in gravity die casting.
  • the workpiece 1 After the workpiece 1 has solidified, it can be removed from the casting mold 3.
  • the lower part 4 and the upper part 5 can be moved apart and then the hot workpiece 1 can be removed from the casting mold 3.
  • the casting mold 3 consists of several parts.
  • the mold core 7 is still in a cavity of the workpiece 1, or the mold core 7 can be arranged on an outer surface of the workpiece 1, or can extend to an outer surface of the workpiece.
  • the hot workpiece 1 is removed from the casting mold 3 at a surface temperature which is above 150 ° C.
  • a surface temperature when the workpiece 1 is removed from the casting mold 3 can be over 300 ° C., in particular between 360 ° and 440 ° C.
  • the workpiece 1 can be removed from the casting mold 3, for example, by means of an automated gripping unit 8.
  • the hot workpiece 1 removed from the casting mold 3 can optionally be cooled in a further step to a surface temperature which, depending on the removal temperature, is between 150 and 400 ° C.
  • a mist 9 composed of water droplets can be used to cool the workpiece 1.
  • the water droplets evaporate as soon as they strike a hot surface of the workpiece 1. Since the workpiece 1 is cooled in this step to a temperature which is well above the evaporation temperature of water, it is ensured that no water droplets can penetrate the mold core 7.
  • the workpiece 1 can also be immersed in an immersion bath to cool down.
  • the surface temperature of the workpiece 1 in the casting mold can be determined, for example, by means of temperature sensors fitted in or on the casting mold 3 and outside of the casting mold 3 also in a contactless manner by means of infrared sensors.
  • other sensors and methods known to the person skilled in the art for determining the temperature can of course also be used.
  • the surface temperature of the workpiece 1 can also be calculated as a mathematical model and calculated over the course of time.
  • the optional additional cooling of the workpiece 1 outside the casting mold 3 only takes place until it has reached the desired temperature in a range between 300 ° and 400 ° C.
  • the mold core 7 can be shattered.
  • a hammer head 10 of a coring hammer 11 is applied to an energy transfer surface 12 of the workpiece 1.
  • an effective surface 14 of the hammer head 10 rests against the energy transfer surface 12 of the workpiece 1.
  • coring hammer 11 The possible structure of a coring hammer 11 is shown in AT 513442 A1 described, wherein the coring hammer 11 is referred to in this document as a vibrating hammer.
  • the strength of the workpiece 1 has not yet been fully achieved at this point in time.
  • the energy transfer surface 12 of the workpiece 1 is therefore subject to special requirements. In particular, it is necessary that the traces of action on the energy transfer surface 12 by the hammer head 10 are only so small that the finished workpiece 1 has no functional losses and / or no optical impairments. Several measures can be taken to achieve this.
  • the energy transfer surface 12 used is a surface of the workpiece 1 which has a lower surface temperature than the remaining surfaces of the workpiece 1.
  • the energy transfer surface 12 can have a higher strength than the remaining surfaces of the workpiece 1.
  • the lower temperature of the energy transfer surface 12 can be achieved, for example, in that the energy transfer surface 12 is arranged in the cast position on an underside 19 of the workpiece 1. This results from the fact that, due to gravity, the molten metal 2 hits the bottom of the casting mold 3 first and, in conventional casting processes in which the molten metal 2 is poured into the casting mold from above, is also heated less strongly by the newly poured molten metal 2. This area can thus cool down first and form the energy transfer surface 12.
  • the workpiece 1 in order to smash the mold core 7, the workpiece 1 is turned upside down in comparison to the cast position, so that the workpiece 1 rests with one support side 20 on the support table 21.
  • the support side 20 is formed opposite the energy transfer surface 12.
  • the workpiece 1 is clamped in a vibrating device 13 and is set to vibrate, with the mold core 7 finally being smashed and removed from the workpiece 1. It can be provided here that the workpiece 1 is rotated in the vibrating device 13 about at least one horizontal axis of rotation 16 while vibrating at the same time. As a result, the broken individual parts of the mandrel 7 can be shaken out of the workpiece 1. In other words, this measure cores the workpiece 1.
  • the treatment of the workpiece 1 by means of the coring hammer 11 can precede the treatment of the workpiece 1 by means of the vibrating device 13, whereby the mold core 7 can initially be broken by means of the coring hammer 11 and broken into small pieces by means of the vibrating device 13, which are also in the Vibrating device 13 can be conveyed out of the workpiece 1.
  • a temperature which has proven to be particularly advantageous for the temperature at which the core of the workpiece 1 can be removed is a temperature which, with a deviation of +/- 30%, corresponds to a temperature at which precipitation hardening of a material of the workpiece 1 begins.
  • the workpiece 1 After the workpiece 1 has been cored, it can be immersed in a basin 18 filled with a cooling liquid 17 for further cooling.
  • the workpiece 1 is then mechanically processed in the area of the energy transfer surface 12.
  • a cutting tool 22 for example a milling cutter, can be used to remove a layer of the energy transfer surface 12 and thus to generate a functional surface.
  • a load sharing plate 23 is inserted between the hammer head 10 and the workpiece 1, by means of which the force applied by the hammer head 10 can be applied evenly to the energy transfer surface 12.
  • the surface pressure on the energy transfer surface 12 can be kept as low as possible, so that the workpiece 1 is not destroyed by the action of the coring hammer 11.
  • two or more coring hammers 11 act on the load sharing plate 23.
  • the load sharing plate 23 is coupled directly to the hammer heads 10 of the individual coring hammers 11 and therefore does not have to be manipulated separately. This is particularly advantageous for series components.
  • Fig. 3 shows a schematic representation of a cylinder head blank 24 and a cylinder head 25 which is manufactured from the cylinder head blank 24 by mechanical processing.
  • an engine block connection surface 26 of the cylinder head blank 24 is visible.
  • the engine block connection surface 26 faces the engine block of the internal combustion engine and in particular rests against the engine block of the internal combustion engine.
  • Fig. 4 shows a perspective view of a coring hammer carrier 27.
  • the coring hammer carrier 27 can serve in particular for receiving or for the automated movement of one or more coring hammers 11.
  • the coring hammers 11 are arranged on an upper slide 28 which can be displaced in the vertical direction, whereby the coring hammers 11 can be placed against the cylinder head blank 24.
  • the coring hammer carrier 27 has a support table 21 on which the cylinder head blank 24 is placed.
  • a buffer element 29, which is arranged between the cylinder head blank 24 and the support table 21, is arranged under the workpiece 1, in particular the cylinder head blank 24.
  • the buffer element 29 can, as shown, be designed in the form of a strip. As an alternative to this, the buffer element 29 can also have a flat design, with recesses also being able to be provided in the buffer element 29, which are permeable to the broken mold core 7.
  • the load sharing plate 23 is coupled to two hammer heads 10 of two stripping hammers 11.
  • a plurality of coring hammers 11 can also be provided to which the load sharing plate 23 is coupled.
  • the coupling of the load sharing plate 23 to the hammer heads 10 of the coring hammers 11 can be done, for example, via a releasable coupling.
  • the engine block connection surface 26 of the cylinder head blank 24 serves as an energy transfer surface 12.
  • the cylinder head blank 24 can be arranged in the casting mold 3 in such a way that the engine block connection surface 26 is arranged in the cast position on the underside 19 of the cylinder head blank 24.
  • FIG. 4 shows a flow diagram of a further possible method sequence for producing a cast workpiece 1.
  • Fig. 5 As can be seen, it can be provided that the workpiece 1 is cast after the casting mold 3 has been prepared.
  • the workpiece 1 can then be removed from the casting mold 3, in particular by means of the gripping unit 8.
  • the removal from the casting mold 3 can take place as soon as the workpiece 1 has a surface temperature in the range of 430 ° C. on the energy transfer surface 12.
  • the surface temperature on the energy transfer surface 12 at the end of the handling process is approximately 400 ° C. or below.
  • the hammer head 10 of the coring hammer 11 can be placed on the energy transfer surface 12 and hammered onto it. After a period of 1 to 20 seconds. at least the outer parts of the mold core 7 break off, so that the surface of the workpiece 1 is exposed and the workpiece 1 can now cool down more quickly.
  • the workpiece 1, in particular the energy transfer surface 12 of the workpiece 1, can be immersed in an immersion bath in order to quench it and cool it down further.
  • the workpiece 1 can be stored in a refrigerated shelf until the surface temperature of the energy transfer surface 12 of the workpiece 1 is between 150.degree. C. and 200.degree.
  • the workpiece 1 can again be applied to the energy transfer surface by the hammer head 10 of a coring hammer 11 in order to smash the remaining parts of the mold core 7.
  • the workpiece 1 can then be clamped in the vibrating device 13 in order to further shatter the mold core 7 and thereby remove it from the workpiece 1.
  • the workpiece 1 can then optionally be further cooled and mechanically processed.
  • Fig. 6 shows a further embodiment of a workpiece 1, which is designed as a hollow cylindrical electric motor housing blank 30 for further processing into an electric motor housing for an electric motor.
  • the energy transfer surface 12 is formed on an end surface 31 of the hollow-cylindrical electric motor housing blank 30.
  • the mold core 7 is partially designed as an external core.
  • the mold core 7 can form the cavity of the electric motor housing blank 30.
  • an internal mold core 7 is formed in the wall of the electric motor housing blank 30, which is used to form cooling water channels in the electric motor housing.
  • the electric motor housing blank 30 is designed as an essentially rotationally symmetrical hollow body.
  • the end face 31 of the hollow cylindrical electric motor housing blank 30 is machined in a further work step.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Golf Clubs (AREA)
  • Arc Welding In General (AREA)

Claims (21)

  1. Procédé de fabrication d'une pièce coulée (1), dans lequel le procédé comprend les étapes suivantes :
    - mise à disposition d'un moule de coulée (3) avec au moins un noyau de moule (7) disposé dans le moule de coulée (3) ;
    - introduction d'une fonte métallique (2) dans le moule de coulée (3) ;
    - attente d'une durée, au moins jusqu'à ce que le contour externe de la fonte métallique (2) soit solidifiée et jusqu'à ce que la pièce (1) soit formée à partir de la fonte métallique (2) ;
    - retrait de la pièce (1) hors du moule de coulée (3) ;
    - fragmentation du noyau de moule (7), dans lequel, pour la fragmentation du noyau de moule (7), une tête de marteau (10) est appuyée contre une surface de transmission d'énergie (12) de la pièce (1) et une action est exercée au moyen de la tête de marteau (10) sur la surface de transmission d'énergie (12),
    caractérisé en ce que
    la fragmentation du noyau de moule (7) par la tête de marteau (10) a lieu à une température superficielle de la surface de transmission d'énergie (12) entre 300 ° Celsius et 400 ° Celsius, dans lequel au moins les parties externes du noyau de moule (7) sont fragmentées.
  2. Procédé selon la revendication 1, caractérisé en ce que, en tant que surface de transmission d'énergie (12), une surface de la pièce (1) est utilisée, qui est usinée mécaniquement dans des étapes de fabrication suivantes, plus particulièrement par enlèvement de copeaux.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, en tant que surface de transmission d'énergie (12), une surface de la pièce (1) est utilisée, qui, au moment de la fragmentation du noyau du moule (7), présente la plus grande résistance de surface.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que, en tant que surface de transmission d'énergie (12), une surface de la pièce (1) est utilisée, qui, pendant le processus de coulée, était disposée au niveau d'une partie inférieure (4) du moule de coulée (3), plus particulièrement par rapport à la position de coulée, au niveau d'un côté inférieur (19) de la pièce (1).
  5. Procédé selon la revendication 4, caractérisé en ce que la pièce (1) est tournée de 180° après le retrait hors du moule de coulée (3), de façon à ce que la surface de transmission d'énergie (12) se trouve sur le côté supérieur de la pièce (1) et à ce que la pièce (1) repose, sur une table d'appui (21), sur un côté d'appui (20) opposé à la surface de transmission d'énergie (12).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pièce (1) est conçue comme une ébauche de tête de cylindre (24) destinée à être usinée ultérieurement en une tête de cylindre (25) pour un moteur à combustion, dans lequel, en tant que surface de transmission d'énergie (12), une surface de raccordement au bloc moteur (26) de l'ébauche de tête de cylindre (24) est utilisée.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la surface de transmission d'énergie (12) est conçue comme une surface plane.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une superficie d'une surface d'action (14) de la tête de marteau (10) ou de la plaque de répartition des charges (23), qui s'appuie, lors de la fragmentation du noyau de moule (7), contre la surface de transmission d'énergie (12), représente entre 150 % et 10 %, plus particulièrement entre 110 % et 50 %, de préférence entre 100 % et 80 % d'une superficie de la surface de transmission d'énergie (12).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pièce (1) est retirée du moule de coulée (3) à une température superficielle de la surface de transmission d'énergie (12) entre 440 ° Celsius et 360 ° Celsius.
  10. Procédé selon la revendication 9, caractérisé en ce que la pièce (1) continue de se refroidir pendant le guidage de la pièce (1) vers une tête de marteau (10) pour la fragmentation du noyau de moule (7) jusqu'à ce que la surface de transmission d'énergie (12) présente une température superficielle entre 300 ° Celsius et 400 ° Celsius.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tête de marteau (10) agit en frappant sur la pièce (1) pendant 1 à 20 secondes.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pièce (1) continue de se refroidir après la fragmentation d'au moins des parties du noyau de moule (7) jusqu'à ce que la surface de transmission d'énergie (12) présente une température superficielle entre 100 ° Celsius et 200 ° Celsius, plus particulièrement entre 150 ° Celsius et 200 ° Celsius et en ce que la pièce (1) est ensuite à nouveau guidée vers une tête de marteau (10) pour la fragmentation du noyau de moule (7), dans lequel les parties restantes du noyau de moule (7), plus particulièrement les parties se trouvant à l'intérieur de la pièce (1), sont fragmentées.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pièce (1) est serrée, après la fragmentation du noyau de moule (7), dans un dispositif vibrant (13) et la pièce (1) est mise en rotation autour d'au moins un axe horizontal (16) pendant les vibrations.
  14. Procédé selon l'une des revendications précédentes, caractérisé en ce que, lors de la fragmentation du noyau de moule (7), plusieurs têtes de marteaux (10) agissent simultanément sur la surface de transmission d'énergie (12).
  15. Procédé selon l'une des revendications précédentes, caractérisé en ce que, entre la tête de marteau (10) et la surface de transmission d'énergie (12), est insérée une plaque de répartition des charges (23).
  16. Procédé selon l'une des revendications précédentes, caractérisé en ce que, dans le moule de coulée (3) est réalisé un canal de refroidissement (15), au moins dans la zone dans laquelle la surface de transmission d'énergie (12) de la pièce (1) est réalisée, dans lequel la pièce (1) est refroidie au moyen du canal de refroidissement (15) au niveau de la surface de transmission d'énergie (12).
  17. Procédé selon l'une des revendications précédentes, caractérisé en ce que la surface de transmission d'énergie (12) est refroidie localement après le retrait de la pièce (1) du moule de coulée (3), par exemple en plongeant la surface de transmission d'énergie (12) de la pièce (1) dans un liquide de refroidissement.
  18. Procédé selon l'une des revendications précédentes, caractérisé en ce que la masselotte de la pièce (1) comprend la surface de transmission d'énergie (12).
  19. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tête de marteau (10) est appuyée, pendant le processus de fragmentation du noyau de moule (7), contre la surface de transmission d'énergie (12) de façon à ce qu'elle s'appuie constamment contre celle-ci même lors d'un décalage de position de la surface de transmission d'énergie (12) de la pièce (1).
  20. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tête de marteau (10) est appuyée, pendant la fragmentation du noyau de moule (7), constamment avec une force de pression entre 100 N et 2000 N, plus particulièrement entre 200 N et 700 N, contre la surface de transmission d'énergie (12) de la pièce (1).
  21. Procédé selon l'une des revendications précédentes, caractérisé en ce que la pièce (1) est conçue comme une ébauche de carter de moteur électrique (30), en forme de cylindre creux, destinée à être usinée en carter de moteur électrique, dans lequel, en tant que surface de transmission d'énergie (12), est utilisée une face frontale (31) de l'ébauche de carter de moteur électrique (30) en forme de cylindre creux.
EP18785245.4A 2017-09-07 2018-09-04 Procédé de fabrication d'une pièce coulée Active EP3678803B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50752/2017A AT520370B1 (de) 2017-09-07 2017-09-07 Verfahren zur Herstellung eines gegossenen Werkstückes
PCT/AT2018/060198 WO2019046874A1 (fr) 2017-09-07 2018-09-04 Procédé de fabrication d'une pièce coulée

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EP3678803A1 EP3678803A1 (fr) 2020-07-15
EP3678803B1 true EP3678803B1 (fr) 2021-07-28

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US (1) US11167344B2 (fr)
EP (1) EP3678803B1 (fr)
CN (1) CN111201097A (fr)
AT (1) AT520370B1 (fr)
BR (1) BR112020004618A2 (fr)
MX (1) MX2020002535A (fr)
RU (1) RU2020112294A (fr)
WO (1) WO2019046874A1 (fr)

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CN115365480A (zh) * 2022-09-14 2022-11-22 江苏天宏机械工业有限公司 一种铝合金铸件自动化后处理设备及方法

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
US4643243A (en) * 1985-08-05 1987-02-17 Seaton-Ssk Engineering Co., Inc. Machine for impact cleaning casting
CH669343A5 (fr) * 1985-12-19 1989-03-15 Werner Lueber
DE3728687A1 (de) * 1987-08-27 1989-03-09 Froelich & Kluepfel Druckluft Verfahren und vorrichtung zum entkernen von gussstuecken
JP3236998B2 (ja) * 1999-04-17 2001-12-10 好高 青山 鋳物の砂落し装置
JP2902641B1 (ja) 1998-07-14 1999-06-07 菱栄エンジニアリング株式会社 鋳砂除去装置
US20070137825A1 (en) 2004-02-25 2007-06-21 Yusuke Kato Process for producing cast item
KR101211347B1 (ko) * 2004-06-28 2012-12-11 콘솔리데이티드 엔지니어링 캄파니, 인크. 주물로부터의 플래싱 및 방해물의 제거를 위한 방법 및장치
FR2954196B1 (fr) * 2009-12-21 2012-01-20 Essilor Int Procede d'usinage pour tournage d'une face d'un verre de lunettes
FR2954195A1 (fr) 2009-12-23 2011-06-24 Fonderie Du Poitou Aluminium Procede de decrochage par martelage utilisant un accelerometre
JP5641408B2 (ja) 2010-07-23 2014-12-17 株式会社ヨーマー 振動打撃式砂落し機及び多連設置式振動打撃式砂落し機
DE102010054496B4 (de) * 2010-12-14 2020-06-18 Volkswagen Ag Durch Gießen hergestelltes Elektromotorgehäuseteil für einen Elektromotor
CN203495196U (zh) 2013-10-09 2014-03-26 浙江瑞庆汽车零部件有限公司 汽缸盖毛坯落砂设备
DE102014221897B4 (de) * 2014-10-28 2023-03-02 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur Überwachung einer impulsbasierten Ausbringung von Kernstrukturen aus zumindest einem Gussteil
AT517384A1 (de) * 2015-06-15 2017-01-15 Fill Gmbh Verfahren zur Herstellung eines gegossenen Werkstückes
WO2017208065A1 (fr) * 2016-05-30 2017-12-07 Nemak, S.A.B. De C.V. Procédé de dénoyautage de pièces coulées

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BR112020004618A2 (pt) 2020-09-24
RU2020112294A (ru) 2021-10-08
US11167344B2 (en) 2021-11-09
MX2020002535A (es) 2020-07-20
EP3678803A1 (fr) 2020-07-15
AT520370B1 (de) 2020-08-15
US20210129215A1 (en) 2021-05-06
WO2019046874A1 (fr) 2019-03-14
CN111201097A (zh) 2020-05-26
AT520370A1 (de) 2019-03-15

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