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EP0268909A2 - Procédé de fabrication de canaux, destinés à conduire des fluides contrôlant la température, dans des pièces coulées ainsi que pièces coulées utilisées comme élément ou outil à température réglable - Google Patents

Procédé de fabrication de canaux, destinés à conduire des fluides contrôlant la température, dans des pièces coulées ainsi que pièces coulées utilisées comme élément ou outil à température réglable Download PDF

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Publication number
EP0268909A2
EP0268909A2 EP87116455A EP87116455A EP0268909A2 EP 0268909 A2 EP0268909 A2 EP 0268909A2 EP 87116455 A EP87116455 A EP 87116455A EP 87116455 A EP87116455 A EP 87116455A EP 0268909 A2 EP0268909 A2 EP 0268909A2
Authority
EP
European Patent Office
Prior art keywords
pipe system
cast
cast body
alloys
channels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87116455A
Other languages
German (de)
English (en)
Other versions
EP0268909A3 (fr
Inventor
Hans Hilgenstock
Manfred Albedyhl
Uwe Plociennik
Detlef Gronert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0268909A2 publication Critical patent/EP0268909A2/fr
Publication of EP0268909A3 publication Critical patent/EP0268909A3/fr
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels

Definitions

  • the invention relates to a method for the formation of channels in castings, in particular in metal castings, for the passage of media for influencing the temperature, the channels being laid as a pipe system in any form as an auxiliary core in the casting mold before the casting process and wherein the pipe system of coolant during the casting process is flowed through.
  • Castings or castings with channels for heat transfer are required for many technical applications in order to avoid undesirably high temperatures or to set certain temperatures (e.g. cooling and heating up of die casting molds for casting crankcases).
  • the ducts have generally been manufactured mechanically (e.g. by drilling).
  • the channels are difficult to form mechanically as spirals, spirals and arches.
  • these mechanical methods then have the particular disadvantage that they cannot be used to produce uniform distances from the heat exchanger surfaces of the media channels. These unequal distances lead to different cooling or warming-up conditions.
  • German Offenlegungsschrift 32 43 377 in the case of a workpiece with a molded channel, a metal component with a cross-section consisting of two or more parts is inserted into the mold before the introduction of the melt, which component is cast into the workpiece or partially cast with it.
  • a cast workpiece made of steel, gray cast iron or nodular cast iron with a dimensionally stable channel which can be designed in any shape and thus to be aerodynamic.
  • a hollow body consisting of materials with different melting points is inserted into the mold as a metallic component and the outer part is to fuse with the cast material.
  • the process is also very expensive to manufacture. The heat transfer conditions in the finished cast body cannot be significantly improved due to the existing material inhomogeneities.
  • German patent 7 26 599 describes a method for encapsulating tubular bodies, in particular multiply bent bodies or bodies having a small internal diameter, with metal of the same or higher melting point, while passing gases or liquids through the tube, the gas used for cooling or the Liquid is passed through the tube under an adjustable back pressure, which approximately keeps the deformation resistance of the tube at its softening temperature.
  • a composite casting is to be produced, which offers a reliable guarantee of perfect welding at all points between the pipe and the casting metal.
  • a removal of the tube is not provided for in this document, since a bond between the tube and the cast body is to be produced, with the same disadvantages due to the material inhomogeneities, as has already been described above.
  • the object of the invention is to present a method for forming channels and a cast body, while avoiding the disadvantages mentioned, with an arbitrary position of the channels and a uniform, optimal heat transfer can be guaranteed in any way.
  • the cast body should be easy and inexpensive to manufacture and process.
  • the pipe system is removed during or after the solidification of the cast body.
  • the pipe system is therefore removed in order to achieve optimal heat transfer conditions in the end product, e.g. B. in a die casting mold or in a continuous casting roll.
  • the pipe systems to be removed from the cast body later can be easily adapted to the contour of the mold or the cast body, whereby equal distances from the heat transfer surfaces to achieve uniform heat transfer conditions (e.g. when heating die casting molds or the aluminum, plastic products to be produced therein, etc. . and later cooling of the castings) can be set.
  • a lower melting material is used for the pipe system than for the cast body. In this way, a particularly simple removal of the pipe system after casting is made possible. Coolant flows through the pipe system to be removed later during the casting process, thereby preventing the pipe system from melting in time.
  • Different coolants advantageously flow through the pipe system simultaneously or in succession.
  • different cooling conditions or characteristics can be easily achieved within wide limits can be varied.
  • the solidification and further cooling of the cast body can be controlled and influenced at the same time, for example also by heating or temporarily maintaining the temperature, in order to produce certain desired material properties.
  • This can, for. B. with certain mold materials, e.g. As chrome-molybdenum-vanadium steels (material numbers 1.2343 and 1.2344), a chrome carbide precipitation is largely prevented and a fine-grained primary structure can be achieved.
  • the pipe system is melted in order to remove it and the melt is driven out by means of a pressurized medium, preferably compressed air.
  • a pressurized medium preferably compressed air.
  • the residual heat of the cast body is used particularly advantageously for melting the pipe system, in the best case the cooling of the pipe system being switched off at a temperature above the melting temperature of the pipe system but below the solidification temperature of the cast body and the residual heat then being sufficient to melt the pipe system.
  • Such a procedure significantly reduces energy costs.
  • the object of the invention is achieved for a cast body with channels for the passage of media for influencing the temperature in that the cast body, when used as intended, consists of only a homogeneous material, the external dimensions of the pipe system forming the internal dimensions of the channels.
  • the pipe system can be removed in a particularly advantageous manner, so that no materials of different thermal conductivity and no undesired cavities remain between the pipe system and the cast body in the cast body.
  • the pipe system which can be easily removed during or after solidification, can be adapted to any shape with great advantage, so that ideal heat transfer conditions, depending on the type of use, e.g. can be set as a die for heating and cooling during casting or in relation to the later use of the casting as a component.
  • the pipe system to be removed can also consist of a material that melts much lower than the cast body and preferably has good heat conductivity.
  • a material that is chemically or electrochemically soluble in relation to the cast body can also be used advantageously for the pipe system.
  • the pipe system to be removed consists of a non-ferrous metal, preferably copper, aluminum or their alloys.
  • the pipe system consists of aluminum or its alloys; for cast bodies made of aluminum or its alloys, zinc or its alloys or plastic is preferably selected as the material.
  • the pipe system to be removed expediently consists of steel, iron, copper or their alloys.
  • lead or its alloys are used for the pipe system to be removed, for castings made of magnesium or its alloys zinc, tin, lead or their alloys.
  • copper, aluminum or their alloys are expediently used for the pipe system to be removed.
  • the mold (1) has a cavity (2) in which after the casting process and the solidification of the casting material, for. B. cast steel forms the cast body (3).
  • hollow bodies in the form of a pipe system (4) with flow through them are inserted into the cavity (2) and guided through the wall of the casting mold (1) at a suitable point with inlet (5) and outlet (6).
  • the pipe system (4) is flowed through by coolant (7, 8) to prevent premature melting and to achieve uniform cooling conditions as well as the desired material properties, which can be different media (e.g. water, oil, emulsions, liquid nitrogen etc .),
  • the feed lines are designed switchable.
  • the pipe system (4) is removed during or after the solidification of the cast body (3).
  • the pipe system (4) located in the cast body (3) and later to be removed advantageously consists of a material that melts lower than the cast body (3).
  • copper can be used for the cooling pipes for cast steel and aluminum for cast copper.
  • the cast body (3) when used as intended, consists of only one homogeneous material, the external dimensions of the pipe system (4) being the same Form the internal dimensions of the channels.
  • the lines of the pipe system can have any cross-sections, can be shaped in any way and can also lie on top of one another in multiple layers.
  • the respective structural design is left to the person skilled in the art in adaptation to the later use of the cast body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
EP87116455A 1986-11-26 1987-11-07 Procédé de fabrication de canaux, destinés à conduire des fluides contrôlant la température, dans des pièces coulées ainsi que pièces coulées utilisées comme élément ou outil à température réglable Withdrawn EP0268909A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3640393 1986-11-26
DE19863640393 DE3640393A1 (de) 1986-11-26 1986-11-26 Verfahren zur bildung von kanaelen in gusskoerpern fuer das durchleiten von medien zur temperaturbeeinflussung sowie gusskoerper zur verwendung als temperaturbeaufschlagtes bauteil oder werkzeug

Publications (2)

Publication Number Publication Date
EP0268909A2 true EP0268909A2 (fr) 1988-06-01
EP0268909A3 EP0268909A3 (fr) 1989-10-11

Family

ID=6314809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116455A Withdrawn EP0268909A3 (fr) 1986-11-26 1987-11-07 Procédé de fabrication de canaux, destinés à conduire des fluides contrôlant la température, dans des pièces coulées ainsi que pièces coulées utilisées comme élément ou outil à température réglable

Country Status (2)

Country Link
EP (1) EP0268909A3 (fr)
DE (1) DE3640393A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5615625A (en) * 1993-04-05 1997-04-01 First National Bank Of Southern Africa Limited System for the secure transportation of articles

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19751473A1 (de) * 1996-12-03 1998-06-04 Volkswagen Ag Verfahren zum Reparieren eines Druckgußmetallteils
DE19751472A1 (de) * 1996-12-03 1998-06-04 Volkswagen Ag Verfahren und Vorrichtung zum Herstellen eines Druckgußmetallteils
DE19718725A1 (de) * 1997-05-02 1998-11-05 Schmidt & Co Gmbh Kranz Verfahren zur Herstellung von wenigstens teilweise hohlen Metallartikeln
CN102240793A (zh) * 2010-05-12 2011-11-16 南通超达机械科技有限公司 一种汽车内饰件铸钢模具冷却水管制作工艺
DE102011076312A1 (de) * 2011-05-23 2012-11-29 Robert Bosch Gmbh Kühlvorrichtung für ein Gehäuse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362875A (en) * 1943-06-03 1944-11-14 Austenal Lab Inc Casting procedure
US3692892A (en) * 1969-02-24 1972-09-19 Jerome H Lemelson Casting and molding method
FI47052C (fi) * 1971-10-11 1973-09-10 Outokumpu Oy Menetelmä erilaisissa sulatusuuneissa käytettävien jäähdytyselementtie n valmistamiseksi.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5615625A (en) * 1993-04-05 1997-04-01 First National Bank Of Southern Africa Limited System for the secure transportation of articles

Also Published As

Publication number Publication date
DE3640393A1 (de) 1988-06-09
EP0268909A3 (fr) 1989-10-11

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Inventor name: PLOCIENNIK, UWE

Inventor name: GRONERT, DETLEF

Inventor name: ALBEDYHL, MANFRED

Inventor name: HILGENSTOCK, HANS