WO2020187573A1 - Noyau de chemise d'eau - Google Patents

Noyau de chemise d'eau Download PDF

Info

Publication number
WO2020187573A1
WO2020187573A1 PCT/EP2020/055739 EP2020055739W WO2020187573A1 WO 2020187573 A1 WO2020187573 A1 WO 2020187573A1 EP 2020055739 W EP2020055739 W EP 2020055739W WO 2020187573 A1 WO2020187573 A1 WO 2020187573A1
Authority
WO
WIPO (PCT)
Prior art keywords
water jacket
jacket core
sections
section
cooling channel
Prior art date
Application number
PCT/EP2020/055739
Other languages
German (de)
English (en)
Inventor
Siegfried Heinrich
Original Assignee
Schaufler Tooling GmbH & Co. KG
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 Schaufler Tooling GmbH & Co. KG filed Critical Schaufler Tooling GmbH & Co. KG
Publication of WO2020187573A1 publication Critical patent/WO2020187573A1/fr

Links

Classifications

    • 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
    • B22C9/101—Permanent cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • 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
    • B22C9/106—Vented or reinforced cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects

Definitions

  • the invention relates to a method for manufacturing a water jacket core.
  • the invention also relates to an associated water jacket core and an associated method for producing a cylinder block
  • Cylinder blocks also called “engine blocks” have
  • a cylinder wall with an inside along which the piston of a fully assembled engine can slide up and down can be a surface created by machining a cast part, and that too can be coated, or the inside of the cylinder wall is formed by the inside of a bushing which is cast into a casting.
  • the cylinder wall is from
  • Cooling water channels are surrounded by an outer wall of the
  • Cylinder blocks are limited.
  • the water jacket is flushed with water when the engine is running in order to ensure that the engine block is cooled around the cylinders.
  • a cylinder block of the "open-deck" type is free of undercuts, at least in the area of the water jacket, that is to say does not have any cast-in material sections between the cylinder wall and an outer wall.
  • a cylinder block can be manufactured as an inexpensive die-cast part.
  • a water jacket core is inserted into the die casting mold. In the case of series blocks, this is usually part of the main use of the
  • the water jacket core is usually made of hot-work steel (1.2343, 1.2344, 1.2367 or comparable high-purity special grades). Due to the lack of space, conventional cooling cannot be introduced into the comparatively thin walls, which leads to strong heating during the filling process during die casting when the water jacket core is in operation. After partial removal, the
  • the water jacket core is therefore cooled down to a correspondingly large extent by usually water-based release agents, which happens in particular in a spray process. This leads to comparatively strong changes between pressure and tensile stresses. This results in a moderate service life of a water jacket core of typically 10,000 to 20,000 casting cycles.
  • a 3D metal printing process also called powder bed process
  • Freely configurable cooling channels can be produced in the printed water jacket core.
  • the cost of these water jacket cores is at least three times that of a conventional one
  • the invention is therefore based on the object of remedying the stated disadvantages of the prior art.
  • Cooling channel sections in at least two separate
  • the structures can in particular be introduced on the joining surfaces of the water jacket core sections. After the structures have been introduced, the structures have been introduced.
  • Water jacket core sections are joined in order to obtain a total, in particular one-piece, water jacket core with at least one cooling channel.
  • a structure can be introduced in a comparatively simple manner, in particular at the later joining surfaces of the water jacket core sections.
  • the Water jacket core sections are joined, so as a total of a particularly one-piece (monolithic)
  • Water jacket core are introduced. When operating the water jacket core in a die casting device,
  • Cooling fluid are passed through the cooling channel in order to reduce the thermally induced stress on the water jacket core and the service life, in particular the
  • the water jacket core sections are arranged in the form of at least two layers on top of one another in order to form the one-piece water jacket core as a whole after joining.
  • the respective water jacket core section can be horizontal
  • the respective water jacket core section can have a vertical extension with a height h.
  • step a. in at least one top of one A recess is introduced into the water jacket core section, wherein in step a. in at least one underside of another water jacket core section one to it
  • Form cooling channel section The upper side of the one water jacket core section consequently forms a joining surface which can be joined to the lower side of the other water jacket core section, which also forms a joining surface.
  • recesses can be made in the bottom or top in a particularly simple manner. The water jacket core sections can then be joined so that the recesses are on top of each other
  • the top or bottom can thereby
  • This arcuate cooling channel section can in particular lie in the area where a cylinder of the cylinder block is cast. It is also advantageous if the horizontal
  • a material recess in particular a bevel, is provided on the edges of the recesses.
  • a bevel can be used in
  • step b. comprises a diffusion welding process.
  • Water jacket core sections connected to one another at the joining surfaces. It is conceivable here that material also flows in the direction of the cooling channel sections. By providence a chamfer on the edges of the recesses, the material can fill the chamfers, so that even after
  • the bevels can consequently be viewed as a type of weld hollow seam or weld hollow fillet.
  • step b one
  • the joining process has proven to be suitable.
  • the water jacket core sections are advantageously connected by means of dowel pins before the joining process.
  • the individual water jacket core sections can so
  • Form cooling channel section Form cooling channel section.
  • the dowel pins can be set in the water jacket core section blanks in areas outside the final water jacket core geometry, so that the dowel pins are no longer present in the water jacket core after finishing.
  • Preferably 3 to 5 water jacket core sections are joined to one another to produce the water jacket core.
  • water jacket core sections can then be arranged one above the other in order to form at least one cooling channel.
  • step a perpendicular to a main extension of the water jacket core sections, at least one vertical cooling channel section in at least one
  • This vertical cooling channel section can in particular lead to a cooling fluid connection, in particular a water connection, so that cooling fluid via a vertical cooling channel section to the horizontal
  • Cooling channel sections can be guided and can be discharged via a further vertical cooling channel section from which at least one cooling channel.
  • a particularly preferred development of the invention provides that the method comprises the further step:
  • Hardening can be, for example
  • the method comprises the further step:
  • Cooling channel sections are introduced.
  • the joining process can then be carried out in order to then
  • water jacket core blank which can then be hardened. It can be in the raw form
  • a hardening delay can be reduced, so that the risk is reduced that there is a hardening
  • the method advantageously includes the further
  • Water jacket core can be reduced.
  • the water jacket core can then be coated, for example nitrided and / or PVD-coated.
  • Multi-layer layers are conceivable.
  • the water jacket core has at least one cooling channel.
  • the water jacket core can be produced at manageable costs compared to cooling-free water jacket cores. In this way, a water jacket core with cooling can be manufactured more economically, in particular, in comparison to one manufactured by means of a 3D metal printing process
  • a water jacket core according to the invention is used in a die casting mold, and wherein a cooling fluid is passed at least temporarily through the at least one cooling channel of the water jacket core during the pressure casting process.
  • the cylinder block can be designed in the so-called "open deck” configuration.
  • the inventive The water jacket core can consequently be put into the die casting mold
  • Water jacket core usually as part of the
  • the cylinder block can have at least one, but in particular several, for example three cylinders,
  • cooling fluid in particular heat transfer oil or (heated) cooling water
  • thermal stresses in the water jacket core can be reduced, which advantageously leads to longer
  • Heat transfer oil or heated cooling water by means of pressurized water devices are preferably used. Due to the small distance to the contour surface, a sufficient cooling effect can nevertheless be achieved. In addition, the water jacket core can be prevented from becoming unnecessarily cold. This also reduces tension during the next filling process.
  • Clocked cooling is also conceivable, for example with a jet cooling process, or without "emptying" the
  • Cooling channels after the active cooling phase are Cooling channels after the active cooling phase.
  • Figure 1 schematic top view of a
  • Figure 2 is a schematic perspective illustration
  • FIG. 3 shows a further perspective illustration of
  • Figure 4 is yet another illustration of the
  • Figure 5 is a schematic perspective illustration
  • FIG. 1 shows a total of a cylinder block 10, which in this case has three cylinders 12, 14, 16.
  • Cylinder extends along one of them
  • Each cylinder 12, 14, 16 is delimited by a respective cylinder wall 24, 26, 28.
  • Each of the cylinder walls 24, 26, 28 has a cylindrical running surface 30, 32, 34 pointing radially inward.
  • the cylinder walls 24, 26, 28 each have a radially outwardly facing wall surface 36, 38, 40.
  • the aforementioned wall surfaces 36, 38, 40 form a radial inner boundary for a cooling channel 42 (also called water jacket 42).
  • the cooling channel 42 is also delimited by an inner side 44 of an outer wall 46 of the cylinder block 10.
  • the cylinder block 10 is therefore as
  • the cylinder block 10 is produced in a die-casting process. To make the water jacket 42, a water jacket core is inserted into the
  • a cavity for forming the water jacket in the cylinder block 10 can consequently be produced in the water jacket core.
  • the water jacket 42 is with
  • Cooling fluid in particular flushed with water, in order to provide cooling of the cylinder block 10 around the cylinders 12, 14, 16.
  • FIG. 2 shows a total of a water jacket core 48 according to one embodiment.
  • the water jacket core 48 can be made from hot work tool steel.
  • the water jacket core 48 has three almost cylindrical sections 50, 52, 54 which merge into one another at transitions 56, 58, 60, 62 which can be seen in FIG. Almost cylindrical means that the sections 50, 52, 54 have a draft angle of, for example, 1-2 ° per side
  • the cylinders 50, 52, 54 are hollow cylinders with a
  • the water jacket core 48 is integrally formed as a whole and has a
  • Each cylinder 50, 52, 54 is provided with a cooling channel 64, 66, 68.
  • Each cooling channel 64, 66, 68 has horizontal sections 70, 72 and 74 which are parallel to the
  • Water jacket cores 48 extend vertically
  • Cooling channel sections 84, 86 through which cooling fluid can be introduced or executed into the cooling channel 64.
  • further cooling channel sections 88, 90, 92, 94 extend through the underside 82 in order to supply the cooling channels 66, 68 with cooling fluid.
  • the middle cooling channel 66 also has a horizontal one
  • connection cooling channel section 96 which extends through the connection section 59.
  • the overall water jacket core 48 is manufactured by the following process:
  • the one-piece water jacket core 48 comprises a total of five water jacket core sections 102, 104, 106, 108, 110 (see FIG. 2).
  • the middle section 106 is shown in Figure 5 as an individual part.
  • the individual sections 102 to 110 are initially available as individual parts.
  • the sections 102 to 110 can either be produced as individual components. However, it would also be conceivable that first a component is produced that includes the sections 102 to 110 and that the component is then separated from one another along parting planes in order to obtain the sections 102 to 110 as individual parts.
  • the sections 102 to 110 are first manufactured separately as individual parts. Smaller machines and comparatively short tools with comparatively
  • fast processing parameters can be used in an advantageous manner.
  • Water jacket core section 106 nearly cylindrical walls 112, 114, 116, an outer side 118, an inner side 120, an underside 122 and an upper side 124. Almost
  • Cylindrical means that the walls 112, 114, 116 have a draft angle of, for example, 1-2 ° per side
  • Water jacket core section 106 has a height h.
  • the almost cylindrical walls 112, 114, 116 are open at the lateral transitions from one wall to the other wall. This also applies to sections 104 and 108-110. Section 102 points in contrast
  • section 106 comprises part of the core section 49.
  • cutouts 126, 128, 130 are made on the underside 122. This can be done for example by a
  • the recesses 126 to 130 consequently form horizontal recesses. Furthermore, vertical cooling channel sections 132, 134 are introduced, for example drilled. In the same way, recesses are made on the upper side 124.
  • recesses and vertical cooling duct sections are provided in the sections 104, 108 on the respective upper and lower sides. Furthermore, recesses are made on the underside of section 110 and on the top of section 102.
  • the sections 102 to 110 are then arranged one on top of the other, these being arranged for a precisely fitting arrangement by means of dowel pins or machined fitting geometries (both not shown).
  • the sections 102 to 110 are then permanently connected to one another by a diffusion welding process in order to create a total
  • cutouts come from one another opposite tops and bottoms of the
  • Sections 102 to 110 one above the other to rest in order to form horizontal cooling channel sections.
  • horizontal cooling channel section can in particular have an oval or upright slot-like cross section.
  • oval configuration it can be an elliptical cross-section, with the major axis of the ellipse in the vertical direction
  • the vertical cooling channel sections 132, 134 are introduced at the transitions 136, 138 at which, as can be clearly seen in FIG. 5, the wall thickness b2 is greater than the wall thickness b1 in other sections (cf. complementary to FIG. 1).
  • material can flow in the direction of the recesses 126 to 130.
  • a bevel can be introduced, for example ground in or in particular milled, on the edges 140 of the cutouts.
  • the water jacket core 48 can be hardened, for example by heat treatment with subsequent tempering processes. The water jacket core 48 can then finish to the final geometry
  • the final geometry is only produced from a blank after hardening. This can minimize hardening distortion.
  • the internal stress of the water jacket core 48 can then be reduced by stress relief annealing.
  • the water jacket core 48 produced in this way (cf. FIGS. 2-4) comprises three cooling channels 64, 66, 68, each with horizontal cooling channel sections in four parallel to one another
  • the water jacket core 48 can be held in a casting mold in the area of the segment 102 (cf. FIG. 2), in particular in a recess in the movable mold insert, and can be held by so-called pinoies (which can fill the cylinder space and by a step that each three smaller and larger diameter of segment 102
  • cooling fluid in particular heat transfer oil or (heated)

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Procédé pour la fabrication d'un noyau de chemise d'eau (48), le procédé comprend les étapes suivantes : • a. montage de structures pour la formation de sections de canal de refroidissement dans au moins deux sections séparées de noyau de chemise d'eau (102, 104, 106, 108, 110), et • b. assemblage des sections de noyau de chemise d'eau, pour obtenir un noyau de chemise d'eau comprenant au moins un canal de refroidissement (64, 68, 66).
PCT/EP2020/055739 2019-03-15 2020-03-04 Noyau de chemise d'eau WO2020187573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019106643.3A DE102019106643A1 (de) 2019-03-15 2019-03-15 Wassermantelkern
DE102019106643.3 2019-03-15

Publications (1)

Publication Number Publication Date
WO2020187573A1 true WO2020187573A1 (fr) 2020-09-24

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ID=69846398

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/055739 WO2020187573A1 (fr) 2019-03-15 2020-03-04 Noyau de chemise d'eau

Country Status (2)

Country Link
DE (1) DE102019106643A1 (fr)
WO (1) WO2020187573A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513090A1 (de) * 1995-04-07 1996-10-10 Gerhard Dipl Ing Dr Ing Betz Verfahren zur Herstellung von inneren Kühlkanälen in Dauergießformen und Dauergießform
US20060055085A1 (en) * 2004-09-14 2006-03-16 Tokyo University Of Agriculture And Technology Layered metal mold and method of using the same for molding
US20070204969A1 (en) * 2006-03-03 2007-09-06 Whealy Gregg E Molding and die casting apparatus and methods
JP2013035053A (ja) * 2011-08-10 2013-02-21 Honda Motor Co Ltd ウォータジャケット成形用金型

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007916A1 (de) * 2008-02-06 2009-08-13 Behr Gmbh & Co. Kg Wärmetauscher zur Ladeluftkühlung, Verfahren zur Herstellung eines Wärmetauschers zur Ladeluftkühlung
DE202010017514U1 (de) * 2010-12-22 2012-01-19 Neue Halberg-Guss Gmbh Gusseisen, insbesondere Zylinderkurbelgehäuse oder Zylinderkopf mit Kühleinrichtungen für die Abfuhr der Verbrennungswärme
EP2527060A1 (fr) * 2011-05-24 2012-11-28 Georg Fischer Automobilguss GmbH Procédé de coulée pour moules permanents
DE102016123496A1 (de) * 2016-12-05 2018-06-07 Schuler Pressen Gmbh Werkzeug zum Gießen und/oder Umformen eines Formteils, Gießvorrichtung, Presse und Verfahren zum Kompensieren einer thermischen Belastung eines Formteils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513090A1 (de) * 1995-04-07 1996-10-10 Gerhard Dipl Ing Dr Ing Betz Verfahren zur Herstellung von inneren Kühlkanälen in Dauergießformen und Dauergießform
US20060055085A1 (en) * 2004-09-14 2006-03-16 Tokyo University Of Agriculture And Technology Layered metal mold and method of using the same for molding
US20070204969A1 (en) * 2006-03-03 2007-09-06 Whealy Gregg E Molding and die casting apparatus and methods
JP2013035053A (ja) * 2011-08-10 2013-02-21 Honda Motor Co Ltd ウォータジャケット成形用金型

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DE102019106643A1 (de) 2020-09-17

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