EP2735387A1 - Mould with bevelled end faces in inner walls - Google Patents

Mould with bevelled end faces in inner walls Download PDF

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Publication number
EP2735387A1
EP2735387A1 EP12193768.4A EP12193768A EP2735387A1 EP 2735387 A1 EP2735387 A1 EP 2735387A1 EP 12193768 A EP12193768 A EP 12193768A EP 2735387 A1 EP2735387 A1 EP 2735387A1
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EP
European Patent Office
Prior art keywords
end faces
mold
wall elements
mold according
chamfered
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Withdrawn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
EP12193768.4A
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German (de)
French (fr)
Inventor
Fathi Ahmad
Uwe Paul
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.)
Siemens AG
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Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP12193768.4A priority Critical patent/EP2735387A1/en
Priority to JP2015543364A priority patent/JP2015535487A/en
Priority to PCT/EP2013/072382 priority patent/WO2014079651A1/en
Priority to US14/443,105 priority patent/US20150283604A1/en
Priority to CN201380061123.XA priority patent/CN104812510A/en
Priority to EP13786645.5A priority patent/EP2890508A1/en
Priority to RU2015124077A priority patent/RU2015124077A/en
Priority to IN3290DEN2015 priority patent/IN2015DN03290A/en
Publication of EP2735387A1 publication Critical patent/EP2735387A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • 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
    • B22C9/04—Use of lost patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies

Definitions

  • the invention relates to a mold having inside walls with end faces which are chamfered.
  • Molds for making hollow components with internal structures such as turbine blades, often have multiple channels in which liquid material propagates.
  • an oxide layer often forms in this region, because in this intermediate region two liquid fronts collide, which then form an oxide film layer in this thin region.
  • the object is achieved by a casting mold according to claim 1.
  • FIG. 1 shows a mold 1 'according to the prior art.
  • a propagation direction of a liquid metal, which is introduced into the mold 1 'or the longitudinal direction of outer 4', 4 '' and inner 7 ', 7' 'wall elements of the mold 1' is designated by the reference numeral 19.
  • the propagation direction 19 runs almost parallel to the walls 4 ', 4 ", 7', 7" (FIG. Fig. 1, 2 ); 103 ', 103 ", 106', 106" ( Fig. 3 ).
  • the mold 1 ' accordinging to the prior art, in the direction of propagation 19 of the molten liquid to be infiltrated viewed opposite the inner wall elements 7', 7 ", wherein between the outer wall elements 4 ', 4" of the mold 1' in the mold 1 ' solidified metal walls 2 ', 2' 'of a cast component results.
  • the inner wall elements 7 ', 7 “have an opening 13' for two incoming liquid fronts 22 ', 22", into which 13' the liquid metal penetrates and thus forms an inner structure 25 ', ie a connection between the walls 2', 2 "of the later cast component.
  • An end face 10 'of the inner wall element 7' and an end face 10 "of the opposite inner wall element 7" are formed perpendicular to the propagation direction 19.
  • FIG. 2 shows a mold 1 according to the invention, in which compared to FIG. 1 an end face 40 of an inner wall element 31 (analogous to 7 ') is designed differently.
  • the end face 40 is chamfered and extends at an angle different from 90 ° to the direction of propagation 19 or to the outer surface 50 of the inner wall element 31.
  • the end face 40 of the inner wall elements 7 ", 31 is bevelled, that of the liquid front 22 ', 22". is first rinsed.
  • the liquid front 34, 37 of the liquid material is influenced and an inventive opening 43, in which the two liquid fronts 34, 37 meet, moves with its contact line 60, away from the bevelled end face 40 and away from a breakthrough 43 between the end faces 10 ", 40 of the inner wall elements 7 '', 31 in a mechanically less critical area, so that a casting with walls 54 ', 54" is formed, which has a higher strength.
  • An inner wall 55 is formed between the inner wall elements 103 ', 106', 103 ", 106" when the metal solidifies.
  • End faces 109 ', 109 "of the wall elements 103', 103", which lie opposite the beveled end faces 112 ', 112 ", are preferably not beveled but extend perpendicularly to the propagation direction 19 or to the side surfaces 51 ', 51''.
  • the angle of the chamfered end faces 40, 112 ', 112' 'to the propagation direction 19 may preferably be between 45 ° and 60 °.
  • the entire end face 40, 112 ', 112' ' is chamfered.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

Casting mold (1) for producing a hollow component with openings (43) and inner walls, comprises at least one inner wall element (31) with openings. A liquid metal penetrates into the openings. At least an inner wall element exhibits a front surface (40) in the region of the opening. The front surface is bevelled and extends in an angle different from 90[deg] to a propagation direction of the liquid metal or from side surfaces (50) of the inner wall element in the casting mold.

Description

Die Erfindung betrifft eine Gussform, die im Inneren Wände mit Stirnseiten aufweist, die angeschrägt sind.The invention relates to a mold having inside walls with end faces which are chamfered.

Gussformen zur Herstellung hohler Bauteile mit inneren Strukturen, wie bei Turbinenschaufeln, weisen oft mehrere Kanäle auf, in denen sich flüssiges Material ausbreitet.Molds for making hollow components with internal structures, such as turbine blades, often have multiple channels in which liquid material propagates.

Dabei bestehen zwischen einzelnen Kanalwänden der Gussform Lücken, die im späteren Gussteil Verbindungselemente darstellen.There are gaps between individual channel walls of the casting mold, which represent connecting elements in the later casting.

Dabei bildet sich oft in diesem Bereich eine Oxidschicht aus, weil in diesem Zwischenbereich zwei Flüssigkeitsfronten aufeinander stoßen, die dann in diesem dünnen Bereich eine Oxidfilmschicht ausbilden.In this case, an oxide layer often forms in this region, because in this intermediate region two liquid fronts collide, which then form an oxide film layer in this thin region.

Es ist daher Aufgabe der Erfindung oben genanntes Problem zu lösen.It is therefore an object of the invention to solve the above-mentioned problem.

Die Aufgabe wird gelöst durch eine Gussform gemäß Anspruch 1.The object is achieved by a casting mold according to claim 1.

In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen.In the dependent claims further advantageous measures are listed, which can be combined with each other in order to achieve further advantages.

Es zeigen:

Figur 1
eine Gussform nach dem Stand der Technik,
Figur 2, 3
eine erfindungsgemäße Gussformen.
Show it:
FIG. 1
a mold according to the prior art,
FIG. 2, 3
a casting molds according to the invention.

Die Beschreibung und die Figuren stellen nur Ausführungsbeispiele der Erfindung dar.The description and the figures represent only embodiments of the invention.

Figur 1 zeigt eine Gussform 1' nach dem Stand der Technik. FIG. 1 shows a mold 1 'according to the prior art.

Eine Ausbreitungsrichtung eines flüssigen Metalls, das in die Gussform 1' eingebracht wird oder die Längsrichtung äußerer 4', 4'' und innerer 7', 7'' Wandelemente der Gussform 1' ist mit dem Bezugszeichen 19 gekennzeichnet.A propagation direction of a liquid metal, which is introduced into the mold 1 'or the longitudinal direction of outer 4', 4 '' and inner 7 ', 7' 'wall elements of the mold 1' is designated by the reference numeral 19.

Die Ausbreitungsrichtung 19 verläuft nahezu parallel zu den Wänden 4', 4'' , 7', 7" (Fig. 1, 2); 103', 103'' , 106', 106'' (Fig. 3).The propagation direction 19 runs almost parallel to the walls 4 ', 4 ", 7', 7" (FIG. Fig. 1, 2 ); 103 ', 103 ", 106', 106" ( Fig. 3 ).

Die Gussform 1' nach dem Stand der Technik weist in der Ausbreitungsrichtung 19 des einzugießenden flüssigen Metalls gesehen gegenüberliegende die inneren Wandelemente 7', 7" auf, wobei das zwischen den äußeren Wandelementen 4', 4" der Gussform 1' in der Gussform 1' erstarrte Metall Wände 2', 2'' eines Gussbauteil ergibt.The mold 1 'according to the prior art, in the direction of propagation 19 of the molten liquid to be infiltrated viewed opposite the inner wall elements 7', 7 ", wherein between the outer wall elements 4 ', 4" of the mold 1' in the mold 1 ' solidified metal walls 2 ', 2' 'of a cast component results.

Die inneren Wandelemente 7', 7" weisen einen Durchbruch 13' für zwei ankommende Flüssigkeitsfronten 22', 22" auf, in den 13' das flüssige Metall eindringt und so eine innere Struktur 25' bildet, also eine Verbindung zwischen den Wänden 2', 2" des späteren Gussbauteils.The inner wall elements 7 ', 7 "have an opening 13' for two incoming liquid fronts 22 ', 22", into which 13' the liquid metal penetrates and thus forms an inner structure 25 ', ie a connection between the walls 2', 2 "of the later cast component.

Im Bereich des Durchbruchs 13' sind verbreiterte Flüssigkeitsfronten 22V, 22VI vorhanden. Gestrichelt angedeutet ist die Kontaktlinie 20' der Flüssigkeitsfronten 22V, 22VI, die sich gegebenenfalls aufgrund von Oxidfilmen auf den Flüssigkeitsfronten 22V, 22VI schmelzmetallurgisch nicht optimal im Durchbruch 13' verbinden. Danach verlaufen die Flüssigkeitsfronten 22"', 22IV wieder wie vorher (= 22', 22").In the area of the breakthrough 13 'widened liquid fronts 22 V , 22 VI are present. Dashed lines indicate the contact line 20 'of the liquid fronts 22 V , 22 VI , which possibly due to oxide films on the liquid fronts 22 V , 22 VI melt metallurgically not optimal in the opening 13' connect. Thereafter, the liquid fronts 22 "', 22 IV again as before (= 22', 22").

Eine Stirnseite 10' des inneren Wandelements 7' und eine Stirnseite 10" des gegenüberliegenden inneren Wandelements 7" sind senkrecht zur Ausbreitungsrichtung 19 ausgebildet.An end face 10 'of the inner wall element 7' and an end face 10 "of the opposite inner wall element 7" are formed perpendicular to the propagation direction 19.

Innerhalb des Durchbruchs 13' kommt es manchmal zu Rissen, wenn das Metall in der inneren Struktur 25' des ausgefüllten Durchbruchs 13' entlang der gestrichelt angedeuteten Linie erstarrt.Within the breakthrough 13 ', cracks sometimes occur when the metal in the inner structure 25' of the filled Breakthrough 13 'solidified along the dashed line indicated.

Figur 2 zeigt eine erfindungsgemäße Gussform 1, bei der im Vergleich zu Figur 1 eine Stirnseite 40 eines inneren Wandelements 31 (analog zu 7') anders ausgebildet ist. Die Stirnseite 40 ist angeschrägt und verläuft unter einem von 90° verschiedenen Winkel zur Ausbreitungsrichtung 19 oder zur Außenfläche 50 des inneren Wandelements 31. Vorzugsweise ist die Stirnseite 40 der inneren Wandelemente 7'', 31 angeschrägt, die von der Flüssigkeitsfront 22', 22" zuerst umgespült wird. FIG. 2 shows a mold 1 according to the invention, in which compared to FIG. 1 an end face 40 of an inner wall element 31 (analogous to 7 ') is designed differently. The end face 40 is chamfered and extends at an angle different from 90 ° to the direction of propagation 19 or to the outer surface 50 of the inner wall element 31. Preferably, the end face 40 of the inner wall elements 7 ", 31 is bevelled, that of the liquid front 22 ', 22". is first rinsed.

Durch diese asymmetrische Ausgestaltung der Stirnseite 40 des Wandelements 31 wird die Flüssigkeitsfront 34, 37 des flüssigen Materials beeinflusst und ein erfindungsgemäßer Durchbruch 43, in dem die zwei Flüssigkeitsfronten 34, 37 aufeinandertreffen, verlagert sich mit seiner Kontaktlinie 60, weg von der abgeschrägten Stirnseite 40 und weg von einem Durchbruch 43 zwischen den Stirnseiten 10", 40 der inneren Wandelemente 7'', 31 in einen mechanisch weniger kritischen Bereich, so dass ein Gussteil mit Wänden 54', 54" entsteht, das eine höhere Festigkeit aufweist.As a result of this asymmetrical configuration of the end face 40 of the wall element 31, the liquid front 34, 37 of the liquid material is influenced and an inventive opening 43, in which the two liquid fronts 34, 37 meet, moves with its contact line 60, away from the bevelled end face 40 and away from a breakthrough 43 between the end faces 10 ", 40 of the inner wall elements 7 '', 31 in a mechanically less critical area, so that a casting with walls 54 ', 54" is formed, which has a higher strength.

Ebenso können die Stirnseiten 112', 112'' von nebeneinander verlaufenden, insbesondere parallelen inneren Wandelementen 103', 106'; 103'', 106'', abgeschrägt werden (Fig. 3), die dann einen von 90° verschiedenen Winkel zur Seitenfläche 51', 51" aufweisen.Likewise, the end faces 112 ', 112''of adjacent, in particular parallel inner wall elements 103', 106 '; 103 ", 106", beveled ( Fig. 3 ), which then have an angle different from 90 ° to the side surface 51 ', 51 ".

Zwischen den inneren Wandelementen 103', 106', 103", 106" bildet sich bei Erstarrung des Metalls noch eine innere Wand 55.An inner wall 55 is formed between the inner wall elements 103 ', 106', 103 ", 106" when the metal solidifies.

Stirnseiten 109', 109" der Wandelemente 103', 103", die den abgeschrägten Stirnseiten 112', 112'' gegenüberliegen, sind vorzugsweise nicht abgeschrägt, sondern verlaufen senkrecht zur Ausbreitungsrichtung 19 oder zu deren Seitenflächen 51', 51''.End faces 109 ', 109 "of the wall elements 103', 103", which lie opposite the beveled end faces 112 ', 112 ", are preferably not beveled but extend perpendicularly to the propagation direction 19 or to the side surfaces 51 ', 51''.

Zwischen dem inneren Wandelementes 103', 106' bzw. 103", 106" gibt es Durchbrüche 53' bzw. 53''.Between the inner wall element 103 ', 106' or 103 ", 106" there are openings 53 'and 53' '.

Vorzugsweise sind alle Stirnseiten 112', 112" zur selben Seite abgeschrägt.Preferably, all end faces 112 ', 112 "are chamfered on the same side.

Der Winkel der abgeschrägten Stirnseiten 40, 112', 112'' zur Ausbreitungsrichtung 19 kann vorzugsweise zwischen 45° und 60° betragen.The angle of the chamfered end faces 40, 112 ', 112' 'to the propagation direction 19 may preferably be between 45 ° and 60 °.

Zu welcher Seite die abgeschrägten Stirnseiten 40, 112', 112'' zeigen, spielt keine Rolle.To which side the beveled end faces 40, 112 ', 112' 'show, does not matter.

Vorzugsweise ist die gesamte Stirnseite 40, 112', 112'' abgeschrägt.Preferably, the entire end face 40, 112 ', 112' 'is chamfered.

Claims (8)

Gussform (1) zur Herstellung eines hohlen Bauteils mit Durchbrüchen (43, 53', 53") und inneren Wänden (54', 54", 55),
bei dem die Gussform (1) zumindest ein inneres Wandelement (7'', 31; 106', 103'; 106'', 103'') mit Durchbrüchen (43, 53', 53'') aufweist,
in denen (43, 53', 53") sich flüssiges Metall auch ausbreiten kann,
wobei zumindest ein inneres Wandelement (31, 106', 106") im Bereich des Durchbruchs (43, 53', 53") eine Stirnseite (40, 112', 112'') aufweist,
die angeschrägt ist
und die in einem von 90° verschiedenen Winkel zu einer Ausbreitungsrichtung (19) des flüssigen Metalls oder von Seitenflächen (51', 51", 50) der inneren Wandelemente (31, 106', 106'') in der Gussform (1) verläuft.Mold (1) for producing a hollow component with apertures (43, 53 ', 53 ") and inner walls (54', 54", 55),
in which the casting mold (1) has at least one inner wall element (7 '', 31; 106 ', 103'; 106 '', 103 '') with openings (43, 53 ', 53''),
in which (43, 53 ', 53 ") liquid metal can also spread,
wherein at least one inner wall element (31, 106 ', 106 ") has an end face (40, 112', 112") in the region of the opening (43, 53 ', 53 "),
which is bevelled
and which is at an angle other than 90 ° to a propagation direction (19) of the liquid metal or side surfaces (51 ', 51 ", 50) of the inner wall members (31, 106', 106 '') in the mold (1) , Gussform nach Anspruch 1,
bei dem die Stirnseite (40, 112', 112'') einen Winkel von 45° bis 60° zur Ausbreitungsrichtung (19) des flüssigen Metalls oder zu den Seitenflächen (50, 51', 51") der inneren Wandelemente (7'', 106', 106") aufweist.Mold according to claim 1,
in which the end face (40, 112 ', 112'') makes an angle of 45 ° to 60 ° to the propagation direction (19) of the liquid metal or to the side surfaces (50, 51', 51 ") of the inner wall elements (7 ''). , 106 ', 106 "). Gussform nach einem oder beiden der Ansprüche 1 oder 2,
bei dem die Gussform (1) mehrere innere Wandelemente (103', 106''; 103'', 106'') aufweist,
wobei mehrere innere Wandelemente (106', 106") eine Abschrägung der Stirnseiten (112', 112'') aufweisen,
die insbesondere jeweils zur gleichen Seite abgeschrägt sind.Mold according to one or both of claims 1 or 2,
in which the casting mold (1) has a plurality of inner wall elements (103 ', 106'';103'',106''),
wherein a plurality of inner wall elements (106 ', 106 ") have a bevel of the end faces (112', 112 ''),
in particular each beveled to the same side. Gussform nach Anspruch 3,
bei dem alle abgeschrägten Stirnseiten (112', 112'') zur selben Seite abgeschrägt sind.Mold according to claim 3,
in which all chamfered end faces (112 ', 112'') are chamfered to the same side. Gussform nach einem oder mehreren der Ansprüche 1, 2, 3 oder 4,
bei dem die Ausbreitungsrichtung (19) der Metallschmelze zumindest stellenweise parallel zu den inneren Wandelementen (106', 103'; 106", 103"; 7", 31) verläuft.Mold according to one or more of claims 1, 2, 3 or 4,
in which the propagation direction (19) of the molten metal runs at least in places parallel to the inner wall elements (106 ', 103', 106 ", 103", 7 ", 31). Gussform nach einem oder mehreren der Ansprüche 1, 2, 3 oder 5,
bei dem die Stirnseiten (109', 109", 10") der inneren Wandelemente (7", 103', 103"),
die den abgeschrägten Stirnseiten (112', 112", 40) der inneren Wandelemente (31, 106', 106") gegenüberliegen, nicht abgeschrägt sind.Mold according to one or more of claims 1, 2, 3 or 5,
in which the end faces (109 ', 109 ", 10") of the inner wall elements (7 ", 103', 103"),
which are opposed to the chamfered end faces (112 ', 112 ", 40) of the inner wall elements (31, 106', 106") are not chamfered. Gussform nach einem oder mehreren der Ansprüche 1, 2, 3, 4, 5 oder 6,
die keramisch ausgebildet ist.Mold according to one or more of claims 1, 2, 3, 4, 5 or 6,
which is ceramic. Gussform nach einem oder mehreren der Ansprüche 1, 2, 3, 4, 5, 6 oder 7,
bei dem die abgeschrägten Stirnseiten (40, 112', 112") dort ausgebildet sind, wo eine Metallschmelze sich zuerst ausbreitet.Mold according to one or more of claims 1, 2, 3, 4, 5, 6 or 7,
wherein the chamfered end faces (40, 112 ', 112 ") are formed where a molten metal first spreads.
EP12193768.4A 2012-11-22 2012-11-22 Mould with bevelled end faces in inner walls Withdrawn EP2735387A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP12193768.4A EP2735387A1 (en) 2012-11-22 2012-11-22 Mould with bevelled end faces in inner walls
JP2015543364A JP2015535487A (en) 2012-11-22 2013-10-25 Mold with end faces chamfered on the inner wall
PCT/EP2013/072382 WO2014079651A1 (en) 2012-11-22 2013-10-25 Casting mould with chamfered end faces on inner walls
US14/443,105 US20150283604A1 (en) 2012-11-22 2013-10-25 Casting mold having beveled end faces on inner walls
CN201380061123.XA CN104812510A (en) 2012-11-22 2013-10-25 Casting mould with chamfered end faces on inner walls
EP13786645.5A EP2890508A1 (en) 2012-11-22 2013-10-25 Casting mould with chamfered end faces on inner walls
RU2015124077A RU2015124077A (en) 2012-11-22 2013-10-25 CASTING FORM WITH SLOPED ENDS ON INTERNAL WALLS
IN3290DEN2015 IN2015DN03290A (en) 2012-11-22 2013-10-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12193768.4A EP2735387A1 (en) 2012-11-22 2012-11-22 Mould with bevelled end faces in inner walls

Publications (1)

Publication Number Publication Date
EP2735387A1 true EP2735387A1 (en) 2014-05-28

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EP12193768.4A Withdrawn EP2735387A1 (en) 2012-11-22 2012-11-22 Mould with bevelled end faces in inner walls
EP13786645.5A Withdrawn EP2890508A1 (en) 2012-11-22 2013-10-25 Casting mould with chamfered end faces on inner walls

Family Applications After (1)

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EP13786645.5A Withdrawn EP2890508A1 (en) 2012-11-22 2013-10-25 Casting mould with chamfered end faces on inner walls

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US (1) US20150283604A1 (en)
EP (2) EP2735387A1 (en)
JP (1) JP2015535487A (en)
CN (1) CN104812510A (en)
IN (1) IN2015DN03290A (en)
RU (1) RU2015124077A (en)
WO (1) WO2014079651A1 (en)

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CN104812510A (en) 2015-07-29
US20150283604A1 (en) 2015-10-08
WO2014079651A1 (en) 2014-05-30
EP2890508A1 (en) 2015-07-08
IN2015DN03290A (en) 2015-10-09
RU2015124077A (en) 2017-01-10

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