EP0430922A2 - Matrice d'extrusion métallique et procédé de sa fabrication - Google Patents

Matrice d'extrusion métallique et procédé de sa fabrication Download PDF

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Publication number
EP0430922A2
EP0430922A2 EP90890294A EP90890294A EP0430922A2 EP 0430922 A2 EP0430922 A2 EP 0430922A2 EP 90890294 A EP90890294 A EP 90890294A EP 90890294 A EP90890294 A EP 90890294A EP 0430922 A2 EP0430922 A2 EP 0430922A2
Authority
EP
European Patent Office
Prior art keywords
die
metallic
recess
shaping
concave
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Withdrawn
Application number
EP90890294A
Other languages
German (de)
English (en)
Other versions
EP0430922A3 (en
Inventor
Karl Dr. Kohlbacher
Walter Kroisenbrunner
Kurt Haberfellner
Karl-Heinz Schmidpeter
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.)
Boehler GmbH
Boehler GmbH Germany
Original Assignee
Boehler GmbH
Boehler GmbH Germany
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 Boehler GmbH, Boehler GmbH Germany filed Critical Boehler GmbH
Publication of EP0430922A2 publication Critical patent/EP0430922A2/fr
Publication of EP0430922A3 publication Critical patent/EP0430922A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/10—Making tools by operations not covered by a single other subclass

Definitions

  • the invention relates to a metallic die for extrusion according to the preamble of claim 1 and a method for producing a die according to the preamble of claim 9.
  • the essentially disk-like die body has at least one opening as a shaping part, through which the material is pressed out with high pressure.
  • the shaping part of the die is exposed to strong abrasive, temperature and thermal shock loads, which are due in particular to the deformation of the material.
  • the rest of the die part or the die base body must withstand the pressure and bending stresses caused by the high pressing forces.
  • dies are often provided with an inlet slope or with a concave-conical inlet surface towards the opening, on the one hand to reduce the specific stresses in the base body of the die, and on the other hand to facilitate the flow of the pressed material into the final shaping recess or opening and thereby facilitate To improve the surface quality of the strand.
  • the different material stresses of the shaping part and the base body of the die were taken into account already proposed to build the die as a composite body from two parts, the shaping inner part made of a highly wear-resistant alloy and a shell or support part made of a tough steel.
  • EU-A-0114592 shows a method for metal processing using dies, the die being manufactured essentially in such a way that a filling made of powdery, highly wear-resistant and / or corrosion-resistant material is introduced into a casing tube made of a tough alloy. whereupon the sealed tube is pressed at 900 ° C and a pressure of at least 900 bar. The composite body thus obtained with all-over metallic. The bond between the cladding tube and the compressed material is subjected to at least 1.3 times the hot deformation and then machined to create a die. After the mechanical processing by cutting to length and turning, a die is obtained which consists of two parts made of different materials and has a full-surface bond between the casing tube and the inner part.
  • the composite surface is coaxial and cylindrical-shaped and is mainly subjected to shear during practical use of the die, which can cause the inner part to break or detach.
  • the concave-conical run-in surface has to be created by mechanical processing of a raw disk, the bond area also being reduced.
  • an extrusion die is described, the die body being constructed from at least two die parts which are made of different metallic materials and which adjoin one another over an essentially flat surface extending transversely to the pressing direction, and the die parts are connected in the same way to form one-piece die bodies. Since there are composite surfaces perpendicular to the pressing direction, matrices constructed in this way can advantageously only be used in Disc shape with flat end faces can be used.
  • the invention has set itself the task of creating metallic dies for the extrusion of metallic materials, in which dies, despite the design with an inlet slope or a concave-conical inlet surface, a shaping die part made of highly wear-resistant material and a support part made of tough material made of metal to form a die body are connected, the disadvantages described do not occur and there is no risk of cracking and breaking even in the case of complicatedly shaped openings and wear is reduced, only a small machining allowance having to be provided on the raw form die.
  • the advantages achieved by the invention are, in particular, that matrices are formed from the working part and the supporting part with a run-in slope and with a shaping die part made of highly wear-resistant and thermally resistant material, the size of the metal composite surface increasing its size and the strength of the strength due to the spatial curvature Connection to the support part are increased. Furthermore, the inlet surface of the die part with high wear resistance and high temperature resistance should be formed at least where high abrasive and temperature loads occur due to the material flow during extrusion.
  • the deformation of the composite pre-material to form a disk-shaped matrix body having a recess results in an advantageous fiber orientation in the material, at the same time significantly reducing the extent of the machining finish and increasing the economy of production.
  • FIGS. 2a, 2b and 2c and FIGS. 3a, 3b, 3c and 3d show some process steps for producing the matrices according to the invention, additional steps not shown being able to be used.
  • a die M is shown in longitudinal section, which has a shaping die part 1, which is connected to the support body 2.
  • the inner surface 4 of the opening 5 widens against the pressing direction P and forms the inlet surface 6.
  • the concave-conical inlet surface 6 is largely formed by the shaping die part 1 made of highly wear-resistant material, the metal composite surface 3 being spatially curved and at a distance from the working surface 4 , 6 follows the die.
  • Such matrices are used when the abrasive and temperature loads on the entire work surface are high.
  • Fig. 1b an embodiment of the die M according to the invention is shown schematically in longitudinal section, the abrasive load increasing in the breakthrough direction or pressing direction P. the inlet surface 6 takes into account.
  • FIG. 1c schematically shows a die M, in which the shaping die part 1 is exposed to high abrasive, temperature and mechanical loads in the region of the opening 5.
  • the support body 2 advantageously encloses the die part 1 on the strongly spatially curved composite surface 3.
  • 2a, 2b and 2c schematically show an example of a production sequence of a die according to the invention.
  • 2a shows a primary material body consisting of an outer part 2 ′′′ made of tough material and a part 1 ′′′ near the axis with high wear and heat resistance with a bore 9.
  • This primary material body is produced, for example, by forging on a long-forging machine from three parts, the inner region consisting of easily machinable material being worked out after hot-forming to form a metallic bond between outer part 2 ′′′ and part 1 ⁇ .
  • Fig. 2b shows the die with the support part 2 'and the shaping inner part 1' in the deformation between a lower die 7 and an upper die 8, wherein a concave-conical depression is introduced through the correspondingly shaped upper die 8.
  • the material of the inner part 1 ' flows in the axial direction in the gap between the dies 7, 8 and in the direction of the conical surface of the upper die 8.
  • the material of the outer part flows into the outer die gap.
  • Fig. 2c the die body with inner part 1 and support part 2 and the separated slugs are shown.
  • the machining finish for example by grinding, is low because the raw shape largely corresponds to the shape of the die and small machining allowances are possible.
  • 3a to 3d schematically show a further production process of a die blank.
  • 3a with an outer part 2 ′′′ and an inner part 1 ′′′ is for example by cutting a composite metal rod to length, which can be produced by hot isostatic pressing and / or rolling.
  • Fig. 3b shows a hot upsetting of the primary material with a flat saddle 7 ', the upper saddle 8' has a projection which causes a flow of the material to the outside by its penetration into the inner part 1 ⁇ .
  • the die body is shaped further in a die according to FIG. 3c; the concave-conical recess is introduced through the upper die 8 '.
  • FIG. 3d shows the separated slugs and the die body, the shaping part 1 being largely enclosed by the support part 2.
  • a composite rod or a composite metal rod with a diameter of 105 mm ⁇ was produced by forging on a long forging machine.
  • the outer part consisted of hot-work steel in accordance with DIN material No. 1.2344, the inner part made of high-alloy, wear-resistant steel DIN material No. 1.2758, with a full-surface metallic bond between the parts.
  • the primary material was manufactured by cutting the annealed composite metal rod to length. The raw material was heated in a forging furnace to a temperature of 1140 ° C and compressed between flat saddles in two steps to form a disc with a height of 60 mm.
  • the disc After reheating to a temperature of 1160 ° C, the disc was forged further in a die, the upper die having a convex-conical projection in the center. This lead caused a material displacement and a flow of the material during the forging process.
  • a matrix with an outer diameter of 160 mm ⁇ , a breakthrough diameter of 70 mm ⁇ and a height of 40 mm was worked out of the annealed raw die body by turning, with chip removal in the conical inlet part 2.2 mm, in the flat support part 1.8 mm amounted to.
  • the coating was hardened and hardened three times and tempered three times.
  • an improvement in the service life compared to composite steel dies with a coaxial-cylindrical bond area of 87% was found, with no breakouts occurring on the shaping die part.
  • Subsequent metallographic examinations showed that the metal composite surface between the shaping die part and the support part was spatially curved, as shown in principle in FIG. 1b, and that a fiber course made visible by etching was largely parallel to the surface in the region of the recess.
  • a triver composite rod with a diameter of approx. 150 mm was produced by HIPing and forging.
  • the gap between an outer tube (DIN material No. 1.2343) and a central inner cylinder made of free-cutting steel was filled with Haynes Stellite Alloy 4 powder, degassed and the body thus obtained was hot isostatically pressed, after which it was deformed with a long forging machine.
  • the raw material tube formed from two materials had an inside diameter of 70 mm ⁇ and an height of 45 mm, the outside diameter of the cylindrical metal composite surface between the outer part and the part closer to the axis being approximately 108 mm ⁇ .
  • the primary material was precision forged in a die, as shown in principle in Fig. 2 b, with a screw press.
  • the slugs were worked out or worked off by an erosion process, whereupon the raw die body was machined by grinding from a machining allowance of 0.5 to 2.5 mm and tempered by heat treatment, in particular based on material no. 1.2343.
  • increases in throughput of at least 125% could be determined.
  • only insignificant wear occurred on the entire entry surface for the opening of the die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP19900890294 1989-11-23 1990-11-06 Metallic extrusion die and method of its manufacture Withdrawn EP0430922A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT267189A AT394325B (de) 1989-11-23 1989-11-23 Metallische matrize zum strangpressen und verfahren zur herstellung derselben
AT2671/89 1989-11-23

Publications (2)

Publication Number Publication Date
EP0430922A2 true EP0430922A2 (fr) 1991-06-05
EP0430922A3 EP0430922A3 (en) 1991-10-09

Family

ID=3538449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900890294 Withdrawn EP0430922A3 (en) 1989-11-23 1990-11-06 Metallic extrusion die and method of its manufacture

Country Status (2)

Country Link
EP (1) EP0430922A3 (fr)
AT (1) AT394325B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130047692A1 (en) * 2010-02-12 2013-02-28 Marco Pasqualon Modular extrusion die
CN114632930A (zh) * 2022-03-16 2022-06-17 成都亿特金属制品有限公司 一种薄壁锥形件的等静压模具及生产方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB356411A (en) * 1930-07-30 1931-09-10 Fritz Singer Improvements in matrix dies for extruding heated metals
US2515589A (en) * 1947-03-06 1950-07-18 Charles A Brauchler Forging dies and manufacture thereof
DE966255C (de) * 1952-10-26 1957-07-18 Werner Schlegel Dipl Ing Verfahren zur Herstellung von Gesenken
US3230759A (en) * 1964-11-16 1966-01-25 Universal Cyclops Steel Corp Extrusion die and the like
DE1918679A1 (de) * 1969-04-12 1970-10-15 Daimler Benz Ag Matrize eines Warmfliesspresswerkzeuges

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1951174A (en) * 1932-12-01 1934-03-13 Simons Aaron Process of making dies, tools, etc.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB356411A (en) * 1930-07-30 1931-09-10 Fritz Singer Improvements in matrix dies for extruding heated metals
US2515589A (en) * 1947-03-06 1950-07-18 Charles A Brauchler Forging dies and manufacture thereof
DE966255C (de) * 1952-10-26 1957-07-18 Werner Schlegel Dipl Ing Verfahren zur Herstellung von Gesenken
US3230759A (en) * 1964-11-16 1966-01-25 Universal Cyclops Steel Corp Extrusion die and the like
DE1918679A1 (de) * 1969-04-12 1970-10-15 Daimler Benz Ag Matrize eines Warmfliesspresswerkzeuges

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130047692A1 (en) * 2010-02-12 2013-02-28 Marco Pasqualon Modular extrusion die
CN114632930A (zh) * 2022-03-16 2022-06-17 成都亿特金属制品有限公司 一种薄壁锥形件的等静压模具及生产方法
CN114632930B (zh) * 2022-03-16 2024-03-26 成都亿特金属制品有限公司 一种薄壁锥形件的等静压模具及生产方法

Also Published As

Publication number Publication date
ATA267189A (de) 1991-09-15
EP0430922A3 (en) 1991-10-09
AT394325B (de) 1992-03-10

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