EP1038613A1 - Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren - Google Patents

Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren Download PDF

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Publication number
EP1038613A1
EP1038613A1 EP99830174A EP99830174A EP1038613A1 EP 1038613 A1 EP1038613 A1 EP 1038613A1 EP 99830174 A EP99830174 A EP 99830174A EP 99830174 A EP99830174 A EP 99830174A EP 1038613 A1 EP1038613 A1 EP 1038613A1
Authority
EP
European Patent Office
Prior art keywords
machine
accordance
pistons
casting
supporting
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.)
Granted
Application number
EP99830174A
Other languages
English (en)
French (fr)
Other versions
EP1038613B1 (de
Inventor
Fabrizio Boscolo
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.)
FATA Aluminium SpA
Original Assignee
Fata Group SpA
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 Fata Group SpA filed Critical Fata Group SpA
Priority to DE69920654T priority Critical patent/DE69920654T2/de
Priority to EP19990830174 priority patent/EP1038613B1/de
Priority to BR0001218-1A priority patent/BR0001218A/pt
Publication of EP1038613A1 publication Critical patent/EP1038613A1/de
Application granted granted Critical
Publication of EP1038613B1 publication Critical patent/EP1038613B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 present invention relates to machines for the production of pistons by means of gravity casting and, more particularly, a machine in accordance with the preamble of Claim 1 hereinbelow.
  • a machine in accordance with the preamble of Claim 1 hereinbelow.
  • the invention indeed, can be applied to the production of pistons of any kind whatsoever, cases in point being pistons for compressors, various heat engines, etc.
  • the present invention sets out to furnish a machine capable of satisfying in an excellent manner all the requirements discussed above.
  • the reference number 1 in these drawings is used to indicate the whole of a machine for the production by means of gravity casting of pistons, including, for example, pistons for internal combustion engines.
  • the pistons concerned would be for motor vehicle engines.
  • the solution in accordance with the invention has been developed paying special attention to its possible use for the production of aluminium (or light alloy) pistons.
  • the invention should not be understood as being limited exclusively to this field of application.
  • the machine 1 includes essentially a robust bench or bed on which there acts a casting robot not shown on the drawings.
  • the said robot is intended to sustain a casting receptacle to pour the molten casting material into a plurality of casting cavities positioned in the underlying part of the machine.
  • This part indicated overall by the reference number 3, is shown in greater detail in Figure 4 and carries the devices intended to move the parts that define the shell or the mould acting as the casting cavity.
  • the rails 5 are normally two in number, one each respectively on the front and the rear side of the machine base 4, and are therefore capable of sustaining the rocking structure defining the part 3 in a position generically between them.
  • rocking structure in question is also provided with respective revolving bodies, which may be, for example, rollers or wheels 6 capable of engaging with and moving longitudinally along the guides or rails 5.
  • revolving bodies which may be, for example, rollers or wheels 6 capable of engaging with and moving longitudinally along the guides or rails 5.
  • the said motion is realized around a horizontal axis X3 that in actual practice is identified by the centres of curvature of the arched trajectories of the guides or rails 5 and located (with respect to the machine base 4) in a position that substantially corresponds to the one in which the casting receptacle carried by the casting robot pours the casting material into the cavities to form the pistons.
  • the rocking motion has been indicated schematically by means of the arrow B in Figure 1, where the part 3 of the machine has been shown both in full line and in broken line.
  • the two positions thus illustrated preferably correspond to the two extreme positions reached by the part in question in the course of its rocking motion controlled by the motor organ 7.
  • the said rocking motion is not normally symmetrical with respect to the vertical direction, but rather has an unsymmetrical pattern with respect to the said vertical direction: the full-line representation of the rocking structure shown in the figure corresponds in fact to a position of the said structure that is generically symmetrical with respect to the ideal transverse median plane and the vertical of the machine 1.
  • the aforesaid rocking motion is intended to be used, for example, when the pistons to be produced by gravity casting are of the type employed in engines where ignition is obtained due to compression, a type of piston produced with the help of inserts that are normally placed by means of the ALFin process.
  • the machine in accordance with the invention employs the current solution that defines the casting cavity of each individual piston by employing a series of elements comprising the following:
  • the solution in accordance with the invention also includes as an important characteristic the fact of associating the lower male plugs A, the lateral blocks B and C, the side pieces D and E and the blocks F of at least two and therefore several pistons that are to be cast simultaneously (four pistons, for example) and making provision for the use of common supporting and actuating structures for the homologous male plugs/blocks/side pieces of several pistons.
  • the lower male plugs A (each of which in actual fact consists of the three blocks A1, A2 and A3) are mounted (by screwing, for example, in accordance with the general configuration of a vise) on a common supporting structure 9 that can move on vertical guides 10 under the action of a series of actuators such as the fluid-operated jacks 11a and 11b.
  • the jack 11a that acts on the structure 9 is preferably carried by a mobile assembly 110 that is moved with respect to the machine base 4 by the jacks 11b.
  • actuators activated by the general control unit, a so-called PLC for example, that supervises - in a known manner - the proper functioning of the machine
  • PLC general control unit
  • the actuators 11a, 11b can therefore be commanded to move in the opposite direction and thus to lower the structure 9 and the male plugs A carried by it in such a manner as to permit the extraction of the castings from the mould cavities.
  • This forcing action is applied both to the principal blocks A1 and - of course - also to the auxiliary blocks A2 and A3, since these, in their turn, are dragged along by and elastically linked with their respective blocks A1.
  • the side pieces D and E are capable of being mounted - by means of screws 13, for example, or some similar fixing elements - on two mobile devices or slides 14 that can perform counterposed to and fro motions with respect to the casting cavity.
  • This movement is realized under the action of actuator elements 15 that could be, for example, fluid-operated jacks.
  • the movement of the slides 14 is realized on guides 16 mounted on the upper part of a plate (see also Figure 1) that constitutes the upper part of the rocking structure of the machine 1.
  • the described arrangement for supporting and moving the side pieces D and E has the advantage of being intrinsically self-centering (note the substantially barycentric position of the stem of the respective actuator element 15 with respect to its particular slide 14) and making possible (by intervening on the fixing elements 13, for example) the ready and rapid substitution of the side pieces D and E intended to realize a certain type of piston (for example, four simultaneous pistons for motor car engines) with different side pieces, of a larger size for example, that can be used for the simultaneous casting, for example, of two pistons for the engine of an industrial vehicle.
  • a certain type of piston for example, four simultaneous pistons for motor car engines
  • At least one of the slides 17 carrying one of the blocks B or C (in the example illustrated by Figure 4 this solution has been adopted for the slide carrying the block B) is configured in such a manner as to be able to move not only in a horizontal direction to come either closer to or further removed from the slide that carries the block C (and therefore in a radial direction with respect to the casting cavity), but also to execute a movement in a direction that is orthogonal with respect to the said radial direction, thus making it possible for the slide 17 and the block B carried on it to move downwards with respect to the common plane in which the casting cavities are located, thereby becoming detached from the piston interior.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Reciprocating Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP19990830174 1999-03-25 1999-03-25 Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren Expired - Lifetime EP1038613B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69920654T DE69920654T2 (de) 1999-03-25 1999-03-25 Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren
EP19990830174 EP1038613B1 (de) 1999-03-25 1999-03-25 Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren
BR0001218-1A BR0001218A (pt) 1999-03-25 2000-03-24 Máquina para a produção de pistões, para motores de combustão interna por exemplo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19990830174 EP1038613B1 (de) 1999-03-25 1999-03-25 Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren

Publications (2)

Publication Number Publication Date
EP1038613A1 true EP1038613A1 (de) 2000-09-27
EP1038613B1 EP1038613B1 (de) 2004-09-29

Family

ID=8243325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990830174 Expired - Lifetime EP1038613B1 (de) 1999-03-25 1999-03-25 Maschine zur Produktion von Kolben, zum Beispiel für Verbrennungsmotoren

Country Status (3)

Country Link
EP (1) EP1038613B1 (de)
BR (1) BR0001218A (de)
DE (1) DE69920654T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106694852A (zh) * 2016-12-16 2017-05-24 山东滨州渤海活塞股份有限公司 铝活塞毛坯铸造机用高刚性框架床身

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696031A (en) * 1950-12-23 1954-12-07 Ile D Etudes Pour Materiel De Automatic machine adapted for the casting of pistons
US2824347A (en) * 1952-11-21 1958-02-25 Bohn Aluminium & Brass Corp Molding machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696031A (en) * 1950-12-23 1954-12-07 Ile D Etudes Pour Materiel De Automatic machine adapted for the casting of pistons
US2824347A (en) * 1952-11-21 1958-02-25 Bohn Aluminium & Brass Corp Molding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106694852A (zh) * 2016-12-16 2017-05-24 山东滨州渤海活塞股份有限公司 铝活塞毛坯铸造机用高刚性框架床身

Also Published As

Publication number Publication date
DE69920654T2 (de) 2005-02-10
BR0001218A (pt) 2000-10-31
EP1038613B1 (de) 2004-09-29
DE69920654D1 (de) 2004-11-04

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