EP2097194A1 - Method and unit for production of a cast component - Google Patents
Method and unit for production of a cast componentInfo
- Publication number
- EP2097194A1 EP2097194A1 EP07821214A EP07821214A EP2097194A1 EP 2097194 A1 EP2097194 A1 EP 2097194A1 EP 07821214 A EP07821214 A EP 07821214A EP 07821214 A EP07821214 A EP 07821214A EP 2097194 A1 EP2097194 A1 EP 2097194A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cast component
- heat treatment
- annealing
- casting
- cooling
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
-
- 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 present invention relates to a method and a system for producing a cast component, in particular a die-cast component preferably made of an aluminum alloy specified in the preambles of claims 1 and 18, respectively.
- the cast component In today's common method for producing a cast component, it is customary to demold the cast component after casting and solidification with the casting melt from its mold. In this case, the cast component still has a demolding temperature of for example 50 ° to 400 ° Celsius.
- the further cooling of the castings is then usually by quenching of static or moving air, or in a pool or by spraying with a liquid cooling medium, in particular with water.
- the casting remnants such as the sprue system, are separated and the cast component as a whole roughly deburred.
- the now present blank of the cast component is then usually stored for several hours or days before a subsequent heat treatment is performed.
- the subsequent single-stage or two-stage heat treatment then usually takes place in a separate plant.
- a plurality of mechanical processing steps which, for example, the straightening of the cast component or the machining of flanges, bores or the like usually complete the manufacturing process.
- a shock-annealing treatment which consists of rapid heating to an annealing temperature of 400 ° to 555 ° Celsius, which is followed by holding at this temperature for a holding time of preferably at least 1. 7 to at most 14.8 min, after which the cast component is forced to substantially cooled to room temperature.
- a disadvantage of the known impact annealing treatment is the fact that - in particular also due to the rapid heating - a very high energy input is required to bring the cast component to the annealing temperature.
- the heat treatment process can be shortened by the known impact annealing treatment, the manufacturing process from the casting process to the completion of the heat treatment is still extremely long in total.
- Object of the present invention is therefore to provide a method and a system for producing a cast component, in particular a die-cast component preferably made of an aluminum alloy of the type mentioned, in which the cast component can be far more energy-efficient heat-treated and manufactured in a significantly reduced production time.
- the heat treatment of the Cast component is started immediately or within a period of up to 15 minutes after demolding from its mold.
- the cast component after demolding from its mold no longer cooled to ambient or room temperature, for example by moving air or by means of a corresponding cooling medium such as water is, but rather that the solidification heat or residual heat of the cast component is exploited to reheat the cast component for heat treatment.
- the cast component is intended to be heated again, in particular starting from a temperature close to its demolding temperature, or subjected to the heat treatment.
- Land vehicles so for example in motor vehicle and motorcycle construction, is suitable.
- the heat treatment process of the cast component within a period of up to 2 minutes, and preferably within a period of up to 15 seconds after demolding from its mold is started. This ensures that the cast component still has the highest possible temperature near its demolding temperature.
- it is provided for this purpose that is started with the heat treatment process directly or within a period of 3 to 8 seconds after demolding, so that the Cast component can be heated at least approximately starting from its demolding temperature.
- the heat treatment process at a temperature of the cast component in a range of 50 ° to 400 ° Celsius, and preferably above 150 ° Celsius of the cast component can be started.
- heating of the cast component to the temperature which normally moves within the range of 400 ° to 540 ° Celsius during solution heat treatment can be achieved extremely economically, since the cast component must be heated by a significantly smaller temperature difference than when heating from the ambient or Room temperature would be necessary.
- the production method according to the invention has proven to be advantageous, in particular in the die casting of cast components made of an aluminum-silicon alloy, since a particularly high energy-saving potential can be achieved by reducing the period between removal from the mold and subsequent heat treatment of the cast component.
- the manufacturing method according to the invention can of course also be used for cast components made from other alloys.
- the process according to the invention in addition to the use in a die-casting process, it is also conceivable, in particular, to use the process according to the invention in sand casting or gravity casting.
- this eliminates the process step of separating the casting residue between demolding of the cast component and the subsequent heat treatment, so that the cast component can be introduced into the heat treatment device at the desired high temperature, for example.
- the casting residue in the heat treatment for example, the solution annealing - subsequent cooling to stabilize or stiffen the cast component can contribute, so that there is a lower distortion.
- the casting residue can be separated particularly easily from the cast component in particular if it has been rapidly cooled, for example by means of moving air or by means of a liquid or the like, and accordingly a yield strength R p0.2 of, for example, about 80 N / mm 2 and an elongation at break A 5 has from 10 to 25%. Since the cast component is thus relatively soft or ductile after the solution annealing, the separation of the casting residue can be carried out without great distortion of the component.
- a further property of the production method according to the invention is that, as a heat treatment method, alternatively both a one-stage soft annealing for example at temperatures of about 320 ° to 440 ° C and holding times of about 4 min to 120 min, as well as in a two-stage process with a solution annealing at for example about 400 ° to 540 ° Celsius and a subsequent aging, for example, at about 140 ° to 240 ° Celsius during a removal time of about 15 minutes to 10 hours can be done.
- the outsourcing of the cast components can also take place at a later time, provided that a corresponding after-treatment with a suitable thermal influence is present, such as, for example, in the case of cathodic dip painting, for example, of the bodyshell of a motor vehicle.
- the cast component is, for example, heat-treated, in particular annealed, for a holding time of about 3 to 120 minutes, and preferably for a holding time of about 12 to 24 minutes, so that an extremely rapid production process of Casting process until the completion of the heat treatment or annealing can be realized.
- a particularly short production method or a particularly short annealing can be achieved by bringing the cast component up to the holding temperature in a rapid heating process, in particular inductively, by means of a burner or in a salt bath.
- a sufficiently fast and low-distortion cooling of the cast component can be achieved after the annealing by these by moving air of a fan or the like. During a cooling time of about 1 to 8 minutes, and preferably during a cooling time of about 2 to 6 min , is made.
- the cooling after the annealing, in particular the solution annealing of course, by means of a cooling liquid, in particular by means of water, are made.
- a further embodiment of the invention further provides that the cast component is stored in an after demolding in a buffer furnace associated with the heat treatment process.
- the cast component is stored in an after demolding in a buffer furnace associated with the heat treatment process.
- the shortening or simplification of the manufacturing process is achieved in particular by the fact that the cast component by means of one and the same transport system - for example in the form of a robot - from to remove the mold and to transport in the heat treatment device is.
- the heat treatment device in particular a heat treatment furnace or a liquid tank - to position in the immediate vicinity of the mold, so that the cast component can be promptly introduced to its removal from the mold.
- a particularly cost-effective and time-saving production method can be realized by removing the cast component from the casting mold by means of the transport system without intermediate storage and transporting it into the heat treatment device. In addition, it is achieved in this way that the heat treatment can be started starting from a relatively high demolding temperature of the cast component.
- the heat treatment device may be associated with a buffer furnace, in which the cast components can be stored and maintained at temperature. This is preferably also accessible by the transport system.
- the transport system - for example in the form of a robot - comprises a gripping means with which the cast component is to be held in the region of a casting residue.
- the risk of distortion of the cast component due to an excessive holding force of the transport system can thus be reduced.
- the cast component is to bring by means of that transport system in the sphere of action of a cooling device, with which already the removal of the cast component from the mold and the introduction into the heat treatment device is done.
- a cooling device about the cooling device then the cast component after the heat treatment - for example, the solution annealing - cool in a simple and rapid manner. Since the cooling device is thus also located near the mold and the heat treatment furnace, the Manufacturing plant according to the invention are provided with extremely little space.
- an aging furnace in the vicinity of the mold or the heat treatment furnace can be arranged so that one and the same transport system can also be used for equipping the paging furnace with the cast component.
- FIG. 1 shows a schematic or symbolic structure of the plant for producing a cast component, which in the present case is produced in a die casting process and subsequently treated in a two-stage heat treatment process within a heat treatment device and an aging furnace;
- FIG. 2 shows a schematic diagram of the time profile of the temperature of the cast component during the heat treatment.
- a cast component 10 is produced in a die casting process in which the liquid molten metal is filled into a casting mold 12 in the form of a metallic permanent mold with a correspondingly high pressure or with a correspondingly short time and high speed.
- the casting mold 12 is held in a corresponding die casting machine 14, via which two mold halves 16, 18 of the casting mold 12 are to be opened or closed.
- the casting mold 12 is made of a casting chamber 22 with molten metal from a Casting tank 20 supplies.
- an aluminum-silicon alloy for example of the type AISiI OMg is used in the present die-casting process.
- the cast member 10 After the molten metal has solidified, the cast member 10 after opening the mold halves 16, 18 and the ejection by means of the ejector 23 by means of a
- the robot 24 demolded.
- the robot 24 in this case comprises a gripping means 26, with which it preferably the casting member 10 to a casting residue 32 such as the
- Angusssystem or the like can record. This ensures that essential areas or the final molded part of the cast component 10 is not unnecessarily deformed by the holding force transmitted by the robot 24 or by its gripping means 26.
- the cast component 10 is introduced immediately after demolding from its mold 12 in a heat treatment device 28 in the form of a heat treatment furnace, with which present a solution annealing is carried out at a temperature of about 400 ° to 540 ° Celsius.
- the casting component 10 when introduced into the heat treatment furnace 28 still has a temperature of about 50 ° to 400 ° Celsius, in particular near the demolding temperature, and preferably above 150 ° to 180 ° Celsius. This ensures that the cast component 10 needs to be heated by a relatively small temperature difference up to the annealing or holding temperature.
- Heat treatment process can also be started within a period of up to 15 minutes after demolding from its mold. It would be conceivable that the cast component 10 is also stored in a buffer furnace associated with the heat treatment device 28. Of course, instead of the oven 28, a
- the cast component 10 can be removed from the casting mold 12 by means of one and the same robot 24 removed and placed in the heat treatment device 28. It is clear that for this purpose it is necessary that the heat treatment device 28 is arranged in the vicinity of the die-casting machine 14 or the casting mold 12.
- the heat treatment process itself can be relatively short due to the already introduced with a temperature near the demolding temperature in the heat treatment device 28 cast member 10.
- the cast component 10 is heat-treated, in particular annealed or solution-annealed, for a holding time of about 3 to 120 minutes, and preferably for a holding time of about 12 to 24 minutes.
- the cast component 10 can in turn be removed by the robot 24 from the heat treatment device 28 and brought into the range of action of a fan 30, with which the cast member 10 during a cooling time of about 1 to 8 min quickly about ambient or Room temperature is cooled. Since the casting residue 32 is still present on the cast component 10, it can be held in a simple manner via the cast residue 32 by the gripping means 26 of the robot 24.
- Another advantage of the casting residue 32 is that it contributes to the cooling of the cast member 10 by means of the fan 30 to its stabilization and thus reduces the delay.
- the present cast component 10 After cooling - as in the present example - by means of the fan 30, the present cast component 10 or its aluminum-silicon alloy, for example, a yield strength Rp O, 2 of about 80 N / mm 2 and an elongation at break A 5 of about 10 to 25% on. Accordingly, the cast component 10 is still very soft in the present case, so that it can be mechanically processed in a simple manner in a further method step by means of a corresponding separating device 34. In the separating device 34, the casting residue 32 is now removed from the cast component 10, the relatively soft material contributing to the fact that no great distortion occurs. In a further method step, if appropriate, straightening of the molded part of the cast component 10 can take place.
- the transfer of the cast component 10 into the separating device 34 can again take place via the gripping means 26 of the robot 24.
- the casting residue 32 can serve as a stop or gauge of the cast component 10.
- the cast member 10 is placed in an aging furnace 36 in which the cast member 10 is treated, for example, at a temperature of 140 ° to 240 ° C during a storage time of about 15 minutes to 10 hours , The transfer of the cast component 10 from the separating device 34 into the aging furnace 36 can again take place via the robot 24.
- the paging furnace 36 need not be part of the plant. Rather, this can also stand separately.
- the outsourcing of the cast component 10 can also take place at a later point in time, provided that a corresponding aftertreatment with a suitable thermal influence is present, as for example in the case of cathodic dip painting, for example, of the carcass of a motor vehicle.
- the cathodic dip coating or the associated removal can take place over a period of 15 to 30 minutes at a temperature in the range of 80 ° to 240 ° Celsius or in particular from 160 ° to 220 ° Celsius.
- a single-stage heat treatment is also carried out, for example by soft annealing at a temperature of about 320 ° to 440 ° C. during an annealing time of about 4 minutes to 120 minutes can be.
- the cast component 10 subjected to all common heat treatment processes can be.
- FIG. 2 shows a schematic diagram of the time profile of the temperature of the cast component 10 during the heat treatment.
- the temperature profile of a conventionally produced cast component 10 is shown with the line RT, which is heated starting from the ambient temperature T space up to the annealing temperature or holding temperature T H , which after a time tm- ha i t is reached.
- the temperature curve of a cast component 10 produced by the method described above is shown with the line ET, which is heated starting from a temperature T ET near the demolding temperature to the annealing temperature or holding temperature T H , which after a time fe-m a i t is reached.
- the holding temperature T H - under otherwise identical heating conditions - starting from the temperature T ET course much earlier is Reach than is on the ambient temperature T space of the case. If, for example, a component of correspondingly small dimensions is heated rapidly in a salt bath, then, for example, the holding temperature T H can already be reached after a period of 5 seconds. In a chamber furnace, a correspondingly large-sized component can only reach its annealing temperature or holding temperature T H after a relatively long time, for example after 30 minutes.
- an injection temperature T E ⁇ nf starting from the temperature T ET is achieved much earlier than starting from the ambient temperature T space , namely at a time t ETemf compared to a time t RTe ⁇ nf ⁇
- the Einformungstemperatur T E ⁇ nf determines the temperature, From which, for example, in the case of solution annealing, for example, an aluminum-silicon casting alloy, the silicon present in the AISi eutectic after the casting process or before the heat treatment is formed or rounded in a needle-like or plate-shaped form. This results in the significantly improved morphology of the cast component 10, which leads, for example, to increased ductility and optionally to a reduced hardness.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006049869A DE102006049869A1 (en) | 2006-10-23 | 2006-10-23 | Production of aluminum alloy die castings comprises heat treating them after maximum of fifteen minutes from demolding |
PCT/EP2007/060847 WO2008049739A1 (en) | 2006-10-23 | 2007-10-11 | Method and unit for production of a cast component |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2097194A1 true EP2097194A1 (en) | 2009-09-09 |
Family
ID=38704908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07821214A Ceased EP2097194A1 (en) | 2006-10-23 | 2007-10-11 | Method and unit for production of a cast component |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100101689A1 (en) |
EP (1) | EP2097194A1 (en) |
JP (1) | JP2010507487A (en) |
CA (1) | CA2667418A1 (en) |
DE (1) | DE102006049869A1 (en) |
WO (1) | WO2008049739A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006057661B4 (en) * | 2006-12-07 | 2019-07-11 | Bayerische Motoren Werke Aktiengesellschaft | Method for die casting of components |
DE102008024524A1 (en) * | 2008-05-21 | 2009-11-26 | Bdw Technologies Gmbh | Method and plant for producing a cast component |
DE102008054318A1 (en) * | 2008-11-03 | 2010-05-12 | Bdw Technologies Gmbh | Method for the production of a pressure cast component made of aluminum alloy, comprises partially subjecting the pressure cast component to a heat treatment process, which is carried out by a metal melt of alloy or pure metal |
DE102009057054B4 (en) * | 2009-12-04 | 2011-07-14 | Audi Ag, 85057 | Tool and method for tempering a cast component |
DE102011114768B4 (en) * | 2010-10-26 | 2015-01-08 | Audi Ag | Method for producing cast components |
DE102011105447B4 (en) * | 2011-06-24 | 2019-08-22 | Audi Ag | Process for the production of aluminum die-cast parts |
DE102011119002A1 (en) * | 2011-11-21 | 2013-05-23 | Audi Ag | Method for preparation of light-metal casting structure e.g. aluminum pressure casting structure, involves casting a metal cast section by casting machine and performing heat treatment of metal cast section using fluidized bed furnace |
EP2623252A1 (en) * | 2012-02-06 | 2013-08-07 | Siemens Aktiengesellschaft | Method of forming a strong connection between two components using forms for manipulating the components |
US20140261904A1 (en) * | 2013-03-13 | 2014-09-18 | Consolidated Engineering Company, Inc. | System and method for formation and processing of high pressure die cast metal articles |
DE102014001958B3 (en) * | 2014-02-12 | 2015-02-12 | Audi Ag | Apparatus and method for processing cast workpieces |
US20160319411A1 (en) | 2015-04-28 | 2016-11-03 | Consolidated Engineering Company, Inc. | System and method for heat treating aluminum alloy castings |
KR101755252B1 (en) * | 2015-11-17 | 2017-07-07 | 동양피스톤 주식회사 | eco mold device for producing piston and mold device for producing piston and piston producing method |
KR101960435B1 (en) * | 2017-08-25 | 2019-03-20 | 주식회사 신한정밀 | Die-casting automation system |
DE102022130113A1 (en) | 2022-11-15 | 2024-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Process for the partial heat treatment of an aluminium die-cast part and use |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2318199C2 (en) * | 1973-04-11 | 1974-11-14 | Mahle Gmbh, 7000 Stuttgart | Process for the heat treatment of cast parts made of a magnesium-aluminum-zinc alloy |
JPH0761488B2 (en) * | 1986-02-12 | 1995-07-05 | 川崎製鉄株式会社 | Manufacturing method and equipment for hot strip |
CA2131194A1 (en) * | 1992-02-27 | 1993-09-02 | Daniel C. Wei | Method for producing a cast aluminum vehicle wheel |
JPH06210437A (en) * | 1993-01-19 | 1994-08-02 | Honda Motor Co Ltd | Production of casting product |
JPH071111A (en) * | 1993-06-16 | 1995-01-06 | Kosei Aruminiyuumu Kogyo Kk | Apparatus for manufacturing aluminum alloy-made wheel |
JP2874526B2 (en) * | 1993-06-30 | 1999-03-24 | 住友金属鉱山株式会社 | Casting method and casting apparatus for small metal ingot |
JPH08238556A (en) * | 1995-03-03 | 1996-09-17 | Toyota Motor Corp | Method for removing resin-made core |
DE19524176C1 (en) * | 1995-07-03 | 1996-09-26 | Daimler Benz Ag | Heat treatment process for light alloy castings |
DE19956895C1 (en) * | 1999-11-26 | 2000-11-16 | Daimler Chrysler Ag | Stress relieving aluminum alloy cylinder head casting, by plastic deformation to create elastic compressive stress in shaft regions facing combustion chambers |
WO2002063051A2 (en) * | 2001-02-02 | 2002-08-15 | Consolidated Engineering Company, Inc. | Integrated metal processing facility |
JP2003053506A (en) * | 2001-08-07 | 2003-02-26 | Toyoda Mach Works Ltd | Conveying device for carrying formed body into treating apparatus by carrying out from forming apparatus |
DE10312028B4 (en) * | 2003-03-18 | 2005-07-28 | Tower Automotive Hydroforming Gmbh & Co. Kg | Process for the production of components |
DE10317080B4 (en) * | 2003-04-12 | 2006-04-13 | Peter Stolfig | Process for the production of shaped sheet metal parts and device for carrying out the process |
AU2003904220A0 (en) * | 2003-08-11 | 2003-08-21 | Castalloy Manufacturing Pty Ltd | External sand removal |
EP1768801A2 (en) * | 2004-06-28 | 2007-04-04 | Consolidated Engineering Company, Inc. | Method and apparatus for removal of flashing and blockages from a casting |
-
2006
- 2006-10-23 DE DE102006049869A patent/DE102006049869A1/en not_active Ceased
-
2007
- 2007-10-11 CA CA002667418A patent/CA2667418A1/en not_active Abandoned
- 2007-10-11 EP EP07821214A patent/EP2097194A1/en not_active Ceased
- 2007-10-11 US US12/446,697 patent/US20100101689A1/en not_active Abandoned
- 2007-10-11 WO PCT/EP2007/060847 patent/WO2008049739A1/en active Application Filing
- 2007-10-11 JP JP2009533781A patent/JP2010507487A/en active Pending
Non-Patent Citations (2)
Title |
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See also references of WO2008049739A1 * |
WILLIAM A. WIESMUELLER, SR.: "Robots in the real World of Die Casting Foundries", ROBOTICS ENGINEERING, no. 3, March 1986 (1986-03-01), pages 5 - 8, XP001315342 * |
Also Published As
Publication number | Publication date |
---|---|
DE102006049869A1 (en) | 2008-04-24 |
CA2667418A1 (en) | 2008-05-02 |
WO2008049739A1 (en) | 2008-05-02 |
JP2010507487A (en) | 2010-03-11 |
US20100101689A1 (en) | 2010-04-29 |
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