EP0105112B1 - Vorrichtung zum Herstellen eines schichtförmigen Halbzeuges - Google Patents

Vorrichtung zum Herstellen eines schichtförmigen Halbzeuges Download PDF

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Publication number
EP0105112B1
EP0105112B1 EP83107409A EP83107409A EP0105112B1 EP 0105112 B1 EP0105112 B1 EP 0105112B1 EP 83107409 A EP83107409 A EP 83107409A EP 83107409 A EP83107409 A EP 83107409A EP 0105112 B1 EP0105112 B1 EP 0105112B1
Authority
EP
European Patent Office
Prior art keywords
blank
extrusion
metal
matrix
opening
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
Application number
EP83107409A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0105112A1 (de
Inventor
Joachim Grosse
Heinrich Dr. Hässler
Günter Tiefel
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
Original Assignee
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 AT83107409T priority Critical patent/ATE22828T1/de
Publication of EP0105112A1 publication Critical patent/EP0105112A1/de
Application granted granted Critical
Publication of EP0105112B1 publication Critical patent/EP0105112B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0021—Matrix based on noble metals, Cu or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/22—Making metal-coated products; Making products from two or more metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/06—Press heads, dies, or mandrels for coating work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C33/00—Feeding extrusion presses with metal to be extruded ; Loading the dummy block
    • B21C33/004—Composite billet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding

Definitions

  • the invention relates to a method for extruding a layered semifinished product according to the preamble of claim 1 and to the associated indirect extrusion device according to the preamble of claim 2.
  • Contact pieces for low-voltage air switchgear usually consist of silver-based materials, to which metalloids or metal oxides are added to reduce the welding power and improve the burning behavior. These filler materials make it difficult to connect to a carrier part, which is done by welding or soldering. For this reason, the contact pieces are often provided with a solderable or weldable second layer.
  • the initially single-layer strands must be clad with the intended solderable layer after suitable, often complex pretreatment and then cut into contact pieces.
  • an auxiliary plating layer is first applied and then hot-rolled clad and dimensionally rolled.
  • markedly brittle materials such as the AgSnO 2 materials preferred for reasons of environmental pollution
  • difficulties in hot roll cladding arise at the usual oxide contents of 10 to 12% by weight because of the low deformability.
  • the starting powders are therefore subjected to additional annealing and granulation treatments.
  • the boundary layer strength can be improved according to DE-A-15 39 848 if the partition wall used in the powder pressing tool is toothed on the underside, so that the powders mix at the boundary layer when this wall is pulled out. However, this leads to a wider transition zone between the different materials.
  • extrusion the direct extrusion method, commonly referred to as extrusion, in which the slug is forward, i.e. in the pressing direction, is pushed through the tool.
  • the recipient wall friction that occurs reduces its value, which can initially be up to double the actual forming force, considerably with the shortening of the remaining press slug, so that the layer geometry and the layer thickness shift along the length of the press strand. Because of the different friction conditions from pressing to pressing, this effect cannot be compensated for even by wedge-shaped design of the boundary layer in the powder pressed part.
  • DE-A-15 27 783 proposes for direct extrusion to provide additional braking surfaces in the pressing die, the friction surfaces delimiting the pressing channel preferably having different lengths in the pressing direction and their length being adapted to the flow properties of the outer layer adjacent to them. This should take into account in particular the different flow behavior of the layer materials.
  • the two-layer powder press technology for the production of finished molded parts has proven itself.
  • the two- or multi-layer parts for example contact material and solderable material, are produced by successively filling the powder layers on top of one another and then pressing them together.
  • the pressing direction is perpendicular to the boundary layer, so that a different compression behavior of the powders does not interfere with the pressing Boundary layer strength affects (powder metallurgy of electrical contacts, Springer-Verlag Berlin 1964, 211 to 213).
  • the invention is therefore based on the object of specifying a method and an associated device with which it is possible to produce a layered semi-finished product from a layered sintered composite blank with layers of metal, metal alloys, metal-metal mixtures or metal-non-metal mixtures without additional plating processes, whereby a uniform layer thickness over length and cross section and high adhesive strength of the layers with one another and high material utilization are to be achieved.
  • a layered semi-finished product for contact pieces can be produced by the indirect multilayer extrusion technique.
  • a blank similar to the two-layer powder pressing technique, is created as a simple cuboid from flat powder layers and indirectly extruded in a recipient with a rectangular or square opening using a specially designed die.
  • a specially designed die with different press channel length is known, in which the press channel length increases continuously from all corners to the middle of all side walls. This is intended to suppress the tendency to form cracks when extruding brittle materials; indirect multi-layer extrusion is not addressed, however.
  • the material flow in indirect multi-layer extrusion is controlled so that the layers have a uniform thickness over the width of the strand even if there is no exact image in the blank.
  • FIG. 1 shows a perspective view of an extrusion die according to the invention with a gable-like height profile with two die openings.
  • the extrusion die is designated.
  • the surface 12 of the die 11 facing the layered sintered composite blank (not shown in the FIG.) Is partially provided with the height profile 13 up to the die openings 14, 15.
  • the upper boundary 16 of the height profile 13 runs centrally to the die openings 14, 15.
  • FIG. 2 shows a device for indirect two-layer extrusion with a die with a height profile according to the invention, as shown in perspective in FIG. 1, in a schematic representation.
  • a hollow punch 24 with the die 22 is inserted into a recipient 21 from below.
  • the left half of the die 22 is provided with a height profile 23.
  • the die 22 is pressed against the blank 26, 27 with the hollow punch 24.
  • the strand or strands in the case of a plurality of die openings emerge through the die opening 25 and through the hollow punch 24.
  • a homogeneous material flow without wall friction on the recipient wall is ensured with the least possible amount of pressing residue. If, as usual, the die were made flat without a profiled surface, this would result in a spherical silver layer course over the strand width because of the then true-to-scale illustration. Due to the special matrix design according to the invention, however, a uniformly thick layer is achieved. In the present case, two-layer strands of high layer thickness uniformity are obtained.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Extrusion Of Metal (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
  • Light Receiving Elements (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP83107409A 1982-08-09 1983-07-27 Vorrichtung zum Herstellen eines schichtförmigen Halbzeuges Expired EP0105112B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83107409T ATE22828T1 (de) 1982-08-09 1983-07-27 Vorrichtung zum herstellen eines schichtfoermigen halbzeuges.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3229626 1982-08-09
DE19823229626 DE3229626A1 (de) 1982-08-09 1982-08-09 Vorrichtung zum herstellen eines schichtfoermigen halbzeuges

Publications (2)

Publication Number Publication Date
EP0105112A1 EP0105112A1 (de) 1984-04-11
EP0105112B1 true EP0105112B1 (de) 1986-10-15

Family

ID=6170442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107409A Expired EP0105112B1 (de) 1982-08-09 1983-07-27 Vorrichtung zum Herstellen eines schichtförmigen Halbzeuges

Country Status (6)

Country Link
US (1) US4519234A (enrdf_load_stackoverflow)
EP (1) EP0105112B1 (enrdf_load_stackoverflow)
JP (1) JPS5945024A (enrdf_load_stackoverflow)
AT (1) ATE22828T1 (enrdf_load_stackoverflow)
BR (1) BR8304237A (enrdf_load_stackoverflow)
DE (2) DE3229626A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3426240A1 (de) * 1984-07-17 1986-01-30 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Verfahren zum herstellen eines bandfoermigen halbzeugs fuer elektrische kontakte aus einem verbundmaterial und vorrichtung zum durchfuehren des verfahrens
JPH02100503U (enrdf_load_stackoverflow) * 1989-01-30 1990-08-10
DE4111509A1 (de) * 1991-04-09 1992-10-15 Austria Metall Verfahren zum herstellen von strangpressprofilteilen
US6854994B2 (en) * 2001-04-19 2005-02-15 Medtronic, Inc. Medical electrical lead connector arrangement including anti-rotation means
CN112207142A (zh) * 2020-09-24 2021-01-12 哈尔滨理工大学 一种制备层状异构镁合金的多次挤压装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887188C (de) * 1942-03-12 1953-08-20 Rau Fa G Verfahren, Rohling und Vorrichtung zur Herstellung von duennplattierten Profilschienen fuer Kontaktstuecke u. dgl.
GB880583A (en) * 1959-06-30 1961-10-25 Mallory Metallurg Prod Ltd Improvements in and relating to the production of composite metallic material
DE1527783A1 (de) * 1966-01-03 1970-04-09 E Duerrwaechter Doduco Kg Dr Verfahren zum Strangpressen schichtweise aus unterschiedlichen Metallen und/oder Verbundwerkstoffen zusammengesetzter Bloecke und Pressmatrize zur Ausuebung des Verfahrens
SU555930A1 (ru) * 1975-05-04 1977-04-30 Матрица дл прессовани многослойных изделий
DE2748392A1 (de) * 1977-10-28 1979-05-03 Degussa Matrize zum strangpressen von eckigen profilen aus sproeden werkstoffen, insbesondere silbergraphit-werkstoffen
DE2848980A1 (de) * 1978-11-11 1980-05-22 Heraeus Gmbh W C Verfahren zur herstellung eines verbundwerkstoffes durch plattieren
DE2952128C2 (de) * 1979-12-22 1984-10-11 Degussa Ag, 6000 Frankfurt Verfahren zur Vorbehandlung des Pulvers für gesintertes und stranggepreßtes Halbzeug aus Silber-Zinnoxid für elektrische Kontakte

Also Published As

Publication number Publication date
ATE22828T1 (de) 1986-11-15
BR8304237A (pt) 1984-03-13
JPS6128411B2 (enrdf_load_stackoverflow) 1986-06-30
EP0105112A1 (de) 1984-04-11
DE3366858D1 (en) 1986-11-20
US4519234A (en) 1985-05-28
JPS5945024A (ja) 1984-03-13
DE3229626A1 (de) 1984-02-09

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