EP1197278A2 - Kernaufbau und Verfahren zum Herstellen eines gegossenen Gehäuses für Fluide unter Verwendung eines solchen Kernaufbaus - Google Patents
Kernaufbau und Verfahren zum Herstellen eines gegossenen Gehäuses für Fluide unter Verwendung eines solchen Kernaufbaus Download PDFInfo
- Publication number
- EP1197278A2 EP1197278A2 EP01124019A EP01124019A EP1197278A2 EP 1197278 A2 EP1197278 A2 EP 1197278A2 EP 01124019 A EP01124019 A EP 01124019A EP 01124019 A EP01124019 A EP 01124019A EP 1197278 A2 EP1197278 A2 EP 1197278A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- core structure
- housing
- cast
- core part
- 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- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- 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
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
Definitions
- the invention is based on a core structure for producing a cast Housing with at least one connecting flange for fluids, the core structure a core section in the area of the connecting flange to be cast has, which forms a flow channel of the housing.
- the invention relates further a method of making a cast housing for fluids Use of such a core structure.
- Cast housings intended for the conveyance of fluids are manufactured using so-called cores, which are in the prepared mold.
- the housings usually have one or several connection flanges with pipes with counter flanges are connected, through which the fluid to be conveyed flows.
- the connection flange or the connection flanges of such a housing is or are with Provide mounting holes through which fastening screws are inserted, into the mounting holes of the counter flanges for mounting the pipes intervention.
- the connection flanges after the casting process radial burrs in the area of the mold parting line that must be removed. It is manufacturing and costly if the mounting holes in the connection flange or in the connection flanges of the housing after it has been cast incorporated and the burrs must be removed after casting.
- the object of the invention is to manufacture a housing with to improve at least one connection flange for fluids so that the incorporation of mounting holes in the connection flange (s) and the Burr removal of the connection flange or flanges after the casting production of the Housing is eliminated.
- the mounting holes are made in the desired shape at the same time when casting the housing in its connecting flange or connecting flanges trained so that a later mechanical incorporation of the mounting holes eliminated.
- This saves considerable manufacturing time and costs for the production of the mounting holes and finally the housing saved.
- These savings are greater than the time and cost of the additional production of an end core part according to the invention, even if this is produced as a lost core part. If the end core part as permanent core is manufactured, its manufacturing costs are practically insignificant.
- the parting line of the two-part mold for the The casting or housing thereon results in at least radial burrs the seamless wall surface side of the end core part on the outside of the cast connection flanges no longer exist.
- the end core part has a disk-shaped, with the axial core projections with a central body Hole for placing the end core part on the end core section of the Core structure.
- the disk-shaped Body and the end core section of the core structure with a Anti-rotation device for the non-rotatable fit of the disc-shaped body on the Core section provided, the rotation lock advantageously from a tongue and groove design consists.
- the end core part can in particular during Insert the entire core assembly into the prepared mold with respect to do not twist the rest of the core structure.
- the end core part has a further rotation lock for its rotation-proof Position and for the non-rotatable position of the entire core structure in the mold.
- a method according to the invention for producing a fluid-flowed cast Housing with at least one connecting flange is characterized in that when molding the cavity of the mold, which is the casting metal and receives the core structure to form the housing, in the axial Connection to its compartment, which is the connection flange of the housing to be cast trains, an extension space is also formed, with the entire core structure is inserted into the cavity so enlarged that the end core part of the core structure fills the expansion space.
- the cast housing, generally designated 1 in FIG. 1, for a conveying medium includes u. a. a suction port 2 with a connecting flange 4 and with a Inlet duct 3 and a pressure nozzle 5 with a connecting flange 7 and an outlet duct 6.
- the remaining, generally known construction of the housing 1, which is intended for a centrifugal pump in particular and u. a. whose impeller receives is not the subject of the invention and therefore not explained further.
- the core structure required for the housing 1 is only partially shown in FIG. 1 and generally numbered 8. It includes u. a. in the area of the connecting piece 2 and 5 each have a core section 9 or 10 for the formation of the respective flow channel 3 and 6 of the housing 1.
- the core sections 9 and 10 have usually such a length that their free ends in a corresponding Supported in the mold to support the core structure in the Position the cavity of the casting mold as intended. 1 shows are core sections 9 and 10 according to the invention each with an end core part 11 or 12 provided. These end core parts are used with corresponding projections 20 several mounting holes 13, 14 in the connecting flanges 4 and 7 train when casting the housing 1.
- each end core part serves also as a wall limitation for the burr-free production of the outside 15, 16 of the relevant connecting flange 4 or 7 and has a joint-free, i.e. have no recesses on the wall surface side 11a, 12a.
- the end core part 12 essentially consists of a disk-shaped body 17 with a central hole 18.
- This central hole has a diameter, which corresponds to the outer diameter of the core section 10, so that the End core part 12 can be pushed onto the core section 10.
- the end area of the core section 10 is somewhat offset in diameter, so that a shoulder 19 is formed, which is the axial position of the core part 12 guaranteed with a composite overall core structure.
- On its wall surface side 12a facing the connecting flange 7 of the housing 1 to be cast the end core part 12 is provided with the axial core projections 20, as clearly shown in Fig. 2.
- the circumferential shape of these axial core protrusions depends on whether circular holes or in the connecting flange to be cast Elongated holes are desired as mounting holes. 3 are for example Elongated holes shown as mounting holes.
- a rotation lock is provided for or for each end core part 11, 12, to ensure that the end core part does not lie on the core section 9 or 10 can twist after mounting.
- a non-rotatable seat can be achieved, for example, in that the end core part 12 in the region of its central hole has a spring 21 and that the associated core section 10 is provided with a corresponding groove 22.
- At least one of the end core parts 11, 12 is provided with a further rotation lock.
- This can, for example be formed in that the end core part at its outer peripheral edge has radial extension 23, as can be clearly seen from FIGS. 2 and 3 is.
- This extension engages in a corresponding recess in the casting mold and thereby not only secures the position of the respective end core part 11, 12 in the mold, but also the intended location of the entire core structure in the mold.
- the entire core structure will be a lost core structure.
- the end core parts 11 and 12 will also be lost core parts. It however, it is also possible to manufacture the end core parts 11 and 12 as permanent cores, so that they can be reused for the next casting process for a housing 1 are.
- the axial core projections 20 of the end core parts then have the casting technology required taper to easily get the core part (s) out of the casting to be able to remove.
- connection flanges corresponding mounting holes when casting a to produce fluid-flowed housing.
- Examples include valves used for pipeline construction. Such valves can e.g. B. Slider or rotary valves, which are usually two axially opposite one another Have connection flanges. With these connection flanges, they are included the corresponding counter flanges of the pipes or the like connected.
- a casting mold 25 is produced in a known manner, usually consists of a lower mold 26 and an upper mold 27. Both forms form in a known manner a cavity 28 into which the core structure 8 is inserted to form the casting space corresponding to the housing 1 to be cast. 4, the cavity 28 has one usual subspace 29, the shape of which is to be cast connecting flange 4 or 7 corresponds.
- An extension space 30 connects to this subspace, which receives the described end core part 11 or 12. This extension room is spatially designed so that it is the negative form of the relevant end core part represents.
- the cavity 28 is of course with two expansion spaces 30 provided.
- the procedure is such that the core structure described above, i. H. a core structure with one or more core end parts 11, 12, in the lower mold 26 is inserted, after which the upper mold 27 is placed on the lower mold and with this is firmly connected. Then the casting metal, e.g. B. rustproof Steel or cast iron, poured into the finished mold.
- the core structure is not shown in FIG. 4, especially since its position in the casting mold is readily apparent to those skilled in the art. After the solidification process, this shows cast housing on its respective connecting flange 4.7 mounting holes 13, 14 on and the outside 15, 16 of the respective connection flange has none disturbing ridges.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- Fig. 1
- einen Axialschnitt durch ein gegossenes Gehäuse mit teilweise dargestelltem Kernaufbau,
- Fig. 2
- in vergrößertem Maßstab den Bereich X in Fig. 1,
- Fig. 3
- eine Seitenansicht auf einen Endkernteil des Kernaufbaus,
- Fig. 4
- eine teilweise Darstellung einer Gießform im Axialschnitt für die Verwendung des neuen Kernaufbaus.
Claims (8)
- Kernaufbau zum Herstellen eines gegossenen Gehäuses mit wenigstens einem Anschlussflansch für Fluide, insbesondere für eine Kreiselpumpe, wobei der Kemaufbau im Bereich des zu gießenden Anschlussflansches einen Kernabschnitt aufweist, der einen Strömungskanal des Gehäuses ausbildet, dadurch gekennzeichnet, dass der Kemabschnitt (9, 10) des Kemaufbaus (8) um ein Endkernteil (11, 12) erweitert ist, welches eine fugenfreie Wandflächenseite (11a, 12a) zum gratfreien Herstellen der Außenseite (15, 16) des zu gießenden Anschlussflansches (4, 7) des Gehäuses und auf dieser Wandflächenseite mehrere axiale Kemvorsprünge (20) zur Gießherstellung von Montagelöchern (13, 14) in dem jeweiligen Anschlussflansch aufweist.
- Kernaufbau nach Anspruch 1, dadurch gekennzeichnet, dass das Endkernteil (11, 12) einen scheibenförmigen, mit den axialen Kernvorsprüngen (20) versehenen Körper mit einem zentralen Loch (18) zum Aufsetzen des Endkernteils auf den Kernabschnitt (9, 10) des übrigen Kernaufbaus aufweist.
- Kernaufbau nach Anspruch 2, dadurch gekennzeichnet, dass der scheibenförmige Körper des Endkernteils (11, 12) und der Kernabschnitt (9, 10) des übrigen Kernaufbaus mit einer Drehsicherung (21, 22) für den drehfesten Sitz des scheibenförmigen Körpers auf dem Kernabschnitt versehen sind.
- Kernaufbau nach Anspruch 3, dadurch gekennzeichnet, dass die Drehsicherung (21, 22) aus einer Nut-Feder-Ausbildung besteht.
- Kernaufbau nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Endkernteil (11, 12) eine weitere Drehsicherung (23) für seine drehsichere Lage in der Gießform aufweist.
- Kemaufbau nach Anspruch 5, dadurch gekennzeichnet, dass die weitere Drehsicherung (23) aus einer radialen Verlängerung am äußeren Umfangsrand des scheibenförmigen Körpers des Endkernteils (11, 12) besteht.
- Kernaufbau nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Endkernteil (11, 12) ein Dauerkem ist.
- Verfahren zum Herstellen eines fluiddurchströmten gegossenen Gehäuses mit wenigstens einem Anschlussflansch, insbesondere für eine Kreiselpumpe, gemäß dem eine geteilte Gießform hergestellt wird, die einen Hohlraum mit einem Kernaufbau darin zur Bildung eines dem zu gießenden Gehäuse entsprechenden Gießraumes aufweist, wonach der Gießraum mit Metall ausgegossen wird, dadurch gekennzeichnet, dass beim Formen des Hohlraumes (28) im axialen Anschluss an seinen den Anschlussflansch des zu gießenden Gehäuses bildenden Teilraum (29) ein Erweiterungsraum (30) mitgeformt wird und dass ein Kernaufbau (8) nach einem der Ansprüche 1 bis 7 hergestellt und in den Hohlraum (28) derart eingelegt wird, dass das Endkernteil (11, 12) des Kernaufbaus den Erweiterungsraum (30) ausfüllt und mit seinen axialen Kernvorsprüngen (20) in den angrenzenden Teilraum (29) hineinragt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2000150448 DE10050448A1 (de) | 2000-10-12 | 2000-10-12 | Kernaufbau und Verfahren zum Herstellen eines gegossenen Gehäuses für Fluide unter Verwendung eines solchen Kernaufbaus |
| DE10050448 | 2000-10-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1197278A2 true EP1197278A2 (de) | 2002-04-17 |
| EP1197278A3 EP1197278A3 (de) | 2003-04-23 |
Family
ID=7659473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01124019A Withdrawn EP1197278A3 (de) | 2000-10-12 | 2001-10-09 | Kernaufbau und Verfahren zum Herstellen eines gegossenen Gehäuses für Fluide unter Verwendung eines solchen Kernaufbaus |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1197278A3 (de) |
| DE (1) | DE10050448A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012200948A1 (de) | 2012-01-24 | 2013-07-25 | Ksb Aktiengesellschaft | Gehäuse für Fluide |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10306122B3 (de) * | 2003-02-14 | 2004-11-11 | Eisengießerei Baumgarte GmbH | Verfahren zur Herstellung eines Metallgussgehäuses |
| DE102004007094B3 (de) * | 2004-02-13 | 2005-09-15 | Eisengießerei Baumgarte GmbH | Herstellungsverfahren für Metallgußgehäuse |
| CN115807789A (zh) * | 2022-11-21 | 2023-03-17 | 常州市宏汇合机械制造有限公司 | 一种带法兰的蜗壳铸件及制造工艺 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE846438C (de) * | 1944-04-04 | 1952-08-14 | Bopp & Reuther Gmbh | Verfahren und Vorrichtung zum Fertiggiessen der Flanschen mit Schraubenloechern an Absperrorgangehaeusen |
| DE4206603A1 (de) * | 1992-03-03 | 1993-09-09 | Innovative Fertigungstechnolog | Verfahren zur herstellung von seitenkanal-kreiselpumpen |
| JPH0822455B2 (ja) * | 1992-12-08 | 1996-03-06 | 株式会社栗本鐵工所 | 管体の鋳型造型方法 |
| KR0178184B1 (ko) * | 1995-12-09 | 1999-02-18 | 배순훈 | 온수순환펌프용 펌프하우징의 성형방법과 그 성형물 |
-
2000
- 2000-10-12 DE DE2000150448 patent/DE10050448A1/de not_active Ceased
-
2001
- 2001-10-09 EP EP01124019A patent/EP1197278A3/de not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012200948A1 (de) | 2012-01-24 | 2013-07-25 | Ksb Aktiengesellschaft | Gehäuse für Fluide |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10050448A1 (de) | 2002-05-02 |
| EP1197278A3 (de) | 2003-04-23 |
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