EP0338419B1 - Giess-Schmiede-Verfahren - Google Patents

Giess-Schmiede-Verfahren Download PDF

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Publication number
EP0338419B1
EP0338419B1 EP89106583A EP89106583A EP0338419B1 EP 0338419 B1 EP0338419 B1 EP 0338419B1 EP 89106583 A EP89106583 A EP 89106583A EP 89106583 A EP89106583 A EP 89106583A EP 0338419 B1 EP0338419 B1 EP 0338419B1
Authority
EP
European Patent Office
Prior art keywords
forging
mold
casting
mold half
die
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.)
Expired - Lifetime
Application number
EP89106583A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0338419A1 (de
Inventor
Friedhelm Bürger
Horst-Peter Tönnissen
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.)
WEHAG LEICHTMETALL GmbH
Original Assignee
WEHAG LEICHTMETALL GmbH
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 WEHAG LEICHTMETALL GmbH filed Critical WEHAG LEICHTMETALL GmbH
Publication of EP0338419A1 publication Critical patent/EP0338419A1/de
Application granted granted Critical
Publication of EP0338419B1 publication Critical patent/EP0338419B1/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
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices

Definitions

  • the invention relates to a casting-forging method according to the preamble of claim 1 and an apparatus for performing the method.
  • Shaped parts made of non-ferrous metals (non-ferrous metals) to which high demands are made with regard to corrosion resistance, dimensional stability and strength, such as shaped parts for hydraulic systems, are manufactured by forging in a forging press.
  • a section of extruded material is generally used as the preform.
  • This preform is formed in the forging press between the lower die and the upper die to the desired molded part.
  • the disadvantage here is that the shape of the extruded material is often in no way matched to the shape of the molded part to be produced, so that Complex material flows occur during the forging process, and it can happen that an uneven material distribution or material density occurs.
  • this method in which a blank made of extruded material is deformed by forging, there is a considerable limitation in the choice of material that only material that is suitable for extrusion can be used.
  • a combined casting-forging process is also known (prospectus "AUTOFORGE” from IWK Pressen GmbH).
  • the preforms are not separated from a strand of material, but cast in a casting mold.
  • the preform can be better adapted to the molded part to be produced.
  • the preforms are transferred to a forging press in the same machine, in which compression and the final shaping of the molded part take place by forging.
  • the known casting-forging process has the disadvantage that a complex machine is required which removes the preforms from the casting mold after casting and then converts them into the forging press.
  • the implementation is a process that on the one hand takes time and on the other hand requires a complex transport device.
  • the invention has for its object to simplify a GiessSmiede method of the type specified in the preamble of claim 1 both from the process sequence and from the machine.
  • one of the mold halves used in casting is also used as a die in forging.
  • the casting mold half and the forging mold half are used alternately together with the combined first mold half.
  • only three mold halves are required in the method according to the invention.
  • the workpiece remains in the combined first mold half after casting and does not have to be moved. This also ensures that the workpiece (the preform) occupies a defined position in the forging die, so that the deformation occurring during forging is reproducible in a defined manner.
  • the device for carrying out the method according to the invention is characterized in that a lower die is provided which is part of a press and which either forms a casting cavity with an upper mold half or forms a forging mold with an upper die.
  • the structure of such a device basically corresponds to that of a forging press, with only one feed device being required which, when the upper die is raised, inserts the upper mold half laterally into the machine and lowered onto the lower die. This can be done with a simple manipulator, the arm of which only has to move in two directions.
  • the method according to the invention is particularly suitable for processing aluminum alloys into corrosion-resistant, high-strength and dimensionally accurate molded parts.
  • the lower half of the mold is used for both casting and forging and the preform in the area of this lower half of the mold is almost given its final shape by the casting process, material shifting or flow of material takes place in the lower half of the mold during forging.
  • material compression is effected, which also takes place in the area of the lower mold half.
  • the material compression and the other advantages that can be achieved by forging are achieved even if the preform has been cast in one half of the forging mold.
  • the volume reduction of the forging mold compared to the casting mold is of course concentrated on the upper half of the mold.
  • a particular advantage of the method according to the invention is energy saving, since the heat present during casting is also used for the forging process and no additional heating is required for forging.
  • the process is also suitable for processing metals or alloys that contain reinforcing fibers.
  • a lower die 10 is provided, which optionally forms a mold cavity with the upper mold half 11 or with the upper die 12.
  • the lower die 10 is fixed in a press (not shown), while the upper die 12 is fastened to the press ram and can be pressed down onto the lower die 10.
  • the upper mold half 11 can be moved a bit in the vertical direction for removal from the mold (arrow 13) and then moved laterally out of the area of the forging press (arrow 14).
  • the waiting position of the upper mold half 11 is designated 11a in FIG. 1.
  • the shape of the cavity half 15 of the lower die 10 corresponds to the molded part to be produced.
  • the cavity half 16 of the upper mold half 11 is forth
  • the molded part to be delivered is only roughly adapted so that a forging process is still required in the forging deformation in order to achieve the final shape of the molded part.
  • compression should also take place so that the cavity 16 contained in the mold half 11 has a larger volume than the cavity 17 contained in the upper die 12.
  • Fig. 1 the case is shown that the mold half 11 sits on the lower die 10, so that both together form a casting mold.
  • a nozzle 18 is attached, which protrudes and forms the pouring channel 19 together with the upper mold half 11.
  • ventilation openings are provided in the upper mold half 11.
  • the casting temperature at which the liquid metal is poured into the casting mold 10, 11 is typically 700 to 740 ° C.
  • the two mold halves 10 and 11 are kept at a constant temperature of approximately 200 ° C. by heating / cooling devices (not shown).
  • the metal has reached the forging temperature of 400 to 450 ° C.
  • the upper mold half 11 is now removed and moved aside and the upper die, which together with the lower die 10 forms the forging mold, is lowered onto the blank remaining in the lower die 10.
  • the finished workpiece only needs to be deburred.
  • the upper mold half 11 has an extension 20 which projects into the lower casting cavity 15 and partially fills it. A hollow blank is thus already produced.
  • the upper die 12 is provided with a mandrel 21, the volume of which is greater than that of the projection 20, so that the mandrel 21 widens and enlarges the cavity of the cast blank, while the blank is essentially supported on the lower die 10.
  • FIG. 3 shows that it is possible to use casting cores 22, 23 in the method according to the invention.
  • the cores 22, 23, each fastened to a displaceable holder 24, 25, protrude through openings 26 into the mold cavity.
  • Corresponding openings or half openings are present both in the mold half 11 and in the upper die 12, so that the cores 22, 23 protrude into the mold cavity both during casting and during forging.
  • the cores 22, 23 can be pulled axially out of the mold.
  • FIG. 4 shows a shaped piece 27 in which a plurality of shaped parts 28 together with a skeleton 29 which is only required for the production have been produced by casting and forging. Following the forging process, the skeleton 29 is removed from the finished molded parts 28. In this way, in particular small-sized molded parts can be produced in large parts at the same time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP89106583A 1988-04-16 1989-04-13 Giess-Schmiede-Verfahren Expired - Lifetime EP0338419B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3812740 1988-04-16
DE3812740A DE3812740A1 (de) 1988-04-16 1988-04-16 Giess-schmiede-verfahren

Publications (2)

Publication Number Publication Date
EP0338419A1 EP0338419A1 (de) 1989-10-25
EP0338419B1 true EP0338419B1 (de) 1991-12-04

Family

ID=6352152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106583A Expired - Lifetime EP0338419B1 (de) 1988-04-16 1989-04-13 Giess-Schmiede-Verfahren

Country Status (2)

Country Link
EP (1) EP0338419B1 (enrdf_load_stackoverflow)
DE (2) DE3812740A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2818565B1 (fr) * 2000-12-27 2003-07-04 Serio Emile Di Procede de fabrication de pieces moulees puis forgees comprenant un ou deux evidements et installation de mise en oeuvre
DE102006036369B4 (de) * 2006-08-02 2009-04-09 Kahn, Friedhelm, Prof. Dr. Ing. Verfahren und Vorrichtung zur Herstellung von Bauteilen durch integriertes Schmelzen, Gießen und Umformen
CN103418771A (zh) * 2012-05-16 2013-12-04 华硕电脑股份有限公司 金属件的铸锻成型方法及铸锻成型设备
EP2848333B1 (de) * 2013-09-16 2021-03-24 Mubea Carbo Tech GmbH Verfahren und Vorrichtung zur Herstellung eines metallischen Bauteils mittels eines Gieß- und Formwerkzeugs
CN109201988B (zh) * 2018-10-31 2019-12-17 南京联科镀膜包装材料有限公司 一种轮毂铸锻设备的铸锻方法
CN110761129B (zh) * 2019-10-31 2020-09-29 燕山大学 一种锻铸一体的辙叉生产方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE200357C (enrdf_load_stackoverflow) *
DE426040C (de) * 1924-12-05 1926-03-02 Gustav Schmale Jr Verfahren und Einrichtung zur Herstellung von Kochgefaessen u. dgl.
DE654267C (de) * 1934-05-12 1937-12-20 Hermann Hollnack Vorrichtung zum Herstellen von Werkstuecken, bei der verfluessigte oder in teigigem Zustand zugefuehrte Werkstoffe in einer Matrize einem Pressdruck unterworfen werden
DE868494C (de) * 1943-04-06 1953-02-26 Otto Fuchs K G Metallwerke Vorrichtung zur laufenden Herstellung von im Gesenk gepressten oder geschmiedeten Werkstuecken aus Metall
US2716792A (en) * 1950-10-05 1955-09-06 Kroyer Karl Kristian Kobs Method of cast-forging metals
BE790453A (fr) * 1971-10-26 1973-02-15 Brooks Reginald G Fabrication d'articles en metal
DE3704457A1 (de) * 1987-02-13 1988-08-25 Kopp Reiner Verfahren zur herstellung metallischer bauteile

Also Published As

Publication number Publication date
DE3812740C2 (enrdf_load_stackoverflow) 1990-03-29
DE3812740A1 (de) 1989-10-26
DE58900521D1 (de) 1992-01-16
EP0338419A1 (de) 1989-10-25

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