EP1651389B1 - Outil composite pour des contraintes de percusion et/ou d'abrasion - Google Patents

Outil composite pour des contraintes de percusion et/ou d'abrasion Download PDF

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Publication number
EP1651389B1
EP1651389B1 EP04763716A EP04763716A EP1651389B1 EP 1651389 B1 EP1651389 B1 EP 1651389B1 EP 04763716 A EP04763716 A EP 04763716A EP 04763716 A EP04763716 A EP 04763716A EP 1651389 B1 EP1651389 B1 EP 1651389B1
Authority
EP
European Patent Office
Prior art keywords
composite tool
shaped body
base
base body
tool according
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.)
Not-in-force
Application number
EP04763716A
Other languages
German (de)
English (en)
Other versions
EP1651389A1 (fr
Inventor
Bruno Mayer
Stephan O. Mayer
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.)
Stahlwerke Bochum GmbH
Original Assignee
Stahlwerke Bochum 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 Stahlwerke Bochum GmbH filed Critical Stahlwerke Bochum GmbH
Publication of EP1651389A1 publication Critical patent/EP1651389A1/fr
Application granted granted Critical
Publication of EP1651389B1 publication Critical patent/EP1651389B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/21—Metals
    • B25D2222/42—Steel

Definitions

  • the invention relates to a composite tool for beating loads.
  • Such tools are used for example for crushing metal, rock or demolition materials.
  • the tools are subjected to extreme loads both in the area of their surfaces which come into direct contact with the material to be comminuted and in the area in which they are held in the respective comminution machine.
  • a disadvantage of the above-explained monobloc simple tools is that they have a consistently low base hardness or are made of impact-hardening materials. They point in usually a too low wear resistance. In contrast, still differentiated, over several sections differently hardened monobloc tools, however, there is often the risk of breakage in the zones, which have a particularly high hardness and, consequently, a low ductility.
  • the present invention seeks to provide a composite tool of the type described above, which has a high wear resistance while minimizing the risk of tool breakage and in which the molded body is securely held in the body over a long period of operation ,
  • a composite tool for impacting and / or abrasive loads which is cast by a base body made of a highly ductile, schlaghärtenden iron-based alloy and at least one cast into the body, with the greatest possible exclusion of a cohesive connection form-fitting held shaped body is formed, which is arranged in the beating load directly exposed area of the composite tool and prefabricated from a deviating from the iron material of the body, highly wear-resistant metal material as a solid body, wherein the molded body starting from a base surface in the direction of his the base surface opposite end face has tapered shape and wherein the end face is assigned to the beating load directly exposed area of the composite tool.
  • Such a shape is given, for example, when the shaped body has the basic shape of a truncated pyramid. In such a substantially conically tapering from the base to the end face shape is ensured in a simple manner that the molded body is held securely in the base body even after a long period of operation.
  • the composite tool according to the invention essentially consists of a base body which is produced from a cast, highly ductile material.
  • a molded body is placed, which is made of a high-strength, also metallic, preferably iron-based alloy.
  • the shape of the shaped body is chosen such that the shaped body is securely held positively in the surrounding material of the base body.
  • the materials of the base body and the molded body are matched to one another in such a way that there is no significant cohesive connection between the molded body and the base body.
  • the shaped body is held by additional mechanically acting aids in the base body.
  • a universally usable in crushing machines, particularly easy to produce composite tool is available, which has a high wear resistance in its exposed primary wear work zone by the molded body arranged there and at the same time has a significantly reduced fracture sensitivity. Since the high impact or abrasive loads are absorbed by the body made of hard, wear-resistant material, the material of the body and applied during its processing heat treatments can be aligned regardless of the loads occurring in practical operation to the highest possible ductility of the body.
  • the heat treatment used in the production of composite tools according to the invention provides that the heat transfer during the manufacturing process takes into account the necessary parameters for the two materials to be combined.
  • the aim is to produce the highest possible ductility in the main body and the highest possible hardness in the molded body. This is achieved by a treatment in the high temperature range of 950 - 1100 ° C. Then there is a broken liquid hardening in the range of 350-600 ° C, which in turn followed by a cooling in air and a subsequent relaxation at temperatures of 300 - 400 ° C.
  • the molding can be prefabricated in any desired, cost-effective manner.
  • the molded body cast into the composite tool according to the invention can be a forged part, a stamped part, a cut part, a fired part, a sintered part or a cast piece.
  • the stamped part, fired or cut part can be made of a flat material.
  • the selection of the materials used for the main body and the molded body ensures that the specific mechanical-technological properties of both materials, namely on the one hand high-sealing strength for the molding and the other highly ductile for the body, both during the manufacturing process itself and in practical use stay.
  • an iron alloy which (in wt .-%) 8.0 - 22.0% Mn, 0.2 - 2.8% Cr, 0.5 1.5% C and balance Fe and unavoidable impurities.
  • an iron alloy which enables a high hardness of the molding contains (in% by weight) 6.0-16.0% Cr, 0.3-1.5% Mo, 0.3-1.4% W, 0.6 - 2.2% C and balance Fe and unavoidable impurities.
  • these alloys can be used to produce particularly durable, robust composite tools which withstand even the toughest loads over the respective required service life.
  • the materials of the base body and the molded body can be coordinated with one another within the alloy specified according to the invention be that the shaped body during and as a result of the use stress is permanently clamped in the composite tool.
  • Another embodiment of the invention which is particularly favorable in terms of increasing the wear resistance and minimizing the risk of tool breakage is characterized in that in the region in which the iron material of the base material laterally surrounds the shaped body, the ratio of the mean measured in a first axis Strength of the base material for measured on the same axis average thickness of the cast molded body is 0.2 to 1.0. Taking into account this range of strength ratios, a high degree of safety against breakage is ensured even in the case of heavily varying loads in the area of the clamping and bearing zone of the composite tool.
  • the production of a composite tool according to the invention is carried out deliberately so that there is no significant metallic bond between the molding and the body surrounding it at least partially.
  • the molded body is rather designed so that the molded body is embedded in a form-fitting manner in the material of the base body.
  • the form-fitting hold of the shaped body can also be achieved by forming depressions in the side surfaces of the shaped body. Alternatively or additionally, elevations may be formed on the side surfaces of the molded body for the same purpose.
  • Fig. 1 to 4 each show a composite tool in perspective view.
  • the composite tools 1, 11, 21, 31 shown in the figures each have a cuboid base body 2, which is cast from a highly ductile iron material.
  • the base body 2 is starting from its one narrow end face 2a in a practical use the direct contact with the material to be crushed, extending over about one third of the total length L of the base body 2 working section 2b, a subsequent to the working section 2b clamping section 2c, on which mounted composite tool 1, 11, 21, 31, the clamping device, not shown, a crusher also not shown, and a subsequent to the chucking section 2c bearing portion 2d divided, on which the composite tool 1 in the mounted position in the crusher is supported.
  • composite tool 1 is poured into the working portion of the base body 2 of a high-strength, hard iron material mass-produced molded body 3.
  • the molded body 3 has a hexagonal base 3a with two opposite long sides, which are connected at their ends in each case by two under a blunt, open in the direction of the inner surface open angle meeting each other short sides. Starting from the base surface 3a shaped in this way, the molded body 3 tapers in the direction of the end face 2a of the main body 2.
  • a shape of the molded body 3 tapering from the base 3 a in the direction of the end face 2 a of the base body 2 3 is associated.
  • the thus shaped molded body 3 is completely surrounded in the new state of the composite tool 1 laterally and in the region of its base 3a of the material of the base body 2.
  • the average thickness d G1 of the body 2 laterally surrounding the shaped body 3 in the thickness direction in a direction parallel to the end face 2 a in the direction of the wider side faces of the base body 2 and perpendicular to the measuring axis X is selected such that the ratio the average thickness d G1 for measured in the same measuring axis X mean thickness d F1 of the molded body 3 is about 0.3.
  • the spectrum measured in a transversely oriented to the measurement axis X measuring axis Y thickness d G2 is the 3 laterally surrounding widthwise wall 2e of the body 2 are chosen the shaped body so that the ratio of the mean thickness d of G2 to the measured in the same measurement axis Y average thickness d F2 of the molding 3 is about 0.2.
  • Composite tool 11 shown is also molded from a high-hardness iron material massively manufactured molded body 13. Unlike the composite tool 1, the material of the main body 2 completely surrounds the shaped body 3 in the new state of the composite tool 11.
  • the molded body 13 of the composite tool 11 has a starting from its base 13a in the direction of its end face 2a of the body 2 associated end face 13b tapered shape.
  • the base surface 13a and accordingly the end face 13b of the molded body 13 are also hexagonal, wherein the surfaces 13a, 13b are bounded in this case by two short, mutually parallel opposite sides, each blunt by two, to the respective surface 13a, 13b , open angles are juxtaposed on longer sides.
  • the substantially conical shape starting from the base surface 13a, the shaping of the solid shaped body 13 and the embedding of the molded body 13 in the material of the base body 12 ensure that the molded body 13 is safe even after a long service life held in the base body 2 and capable of acting on the composite tool 11 directly striking beating load just as safely record.
  • composite tool 21 is in turn cast in the working section 2 b of the base body 2, a generated from a hard metal material, solidly formed moldings 23.
  • the material of the main body 2 completely surrounds the shaped body 23 when new.
  • the molded body 23 has a truncated pyramid-shaped, four side surfaces 23c, 23d, 23e, 23f having basic shape whose base 23a is greater than its the end face 2a of the base body 2 associated end face 23b.
  • two of the opposite side surfaces 23c, 23d of the molded body 23 are formed at regular intervals, extending over the length of the molded body 23 channel-like recesses 23g formed while on the other two opposite side surfaces 23e, 23f in an irregular arrangement knob-like projections 23h are formed ,
  • the recesses 23g and the projections 23h in combination with the conically tapering shape of the molded body 23 starting from the base surface 23a in the direction of the end face 23b, support its secure, form-fitting hold in the material of the base body 2.
  • the composition of the iron material of the base body 2 is the same tuned to the composition of the iron material from which the molded body 23 is made, that the molded body 23 is additionally retained in the base body 2 in a force-locking manner after the completion of the composite tool 21 as a result of the different thermal expansion behavior of the two materials.
  • three composite molds 31 ', 33 "and 33''each made of a wear-resistant, hard iron material are produced as massive bodies.
  • the shaped bodies 33 ', 33 ", 33”' are each designed in the shape of a truncated pyramid and, starting from their rectangular base 33a in the direction of the end face 2a of the base body 2 of the composite tool 31, taper conically and in the new state flush with this aligned end face 33b.
  • the length of the molded body 33 "disposed between the two outer molded bodies 33 ', 33"' is about half the length of the two other molded bodies 33 'and 33 "'.
  • the molded bodies 33 ', 33" and 33 “' are included arranged at a distance such that both the ratio of the measured in the direction of the measuring axis X average thickness d G1 of the mold bodies 33 ', 33 “and 33”' in the thickness direction surrounding material of the base body 2 measured in the same measuring axis X average thickness d F1 the shape of the body 33 ', 33 “, 33”' and the ratio of measured in the direction of the measuring axis Y average thickness d G2 of the mold body 33 ', 33 “and 33”' respectively in the width direction surrounding material of the base body 2 in the same measuring axis Y measured average thickness d F2 of the shaped bodies 33 ', 33 ", 33”' is in the range of 0.2 to 1.0.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Earth Drilling (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Forging (AREA)
  • Laminated Bodies (AREA)

Claims (7)

  1. Outil composite pour des contraintes de percussion et / ou d'abrasion, qui est doté d'un corps de base (2), fabriqué en alliage à base de fer, extrêmement ductile et durcissant au choc, et d'au moins un corps préformé (3, 13, 23, 33', 33", 33"'), qui, coulé dans le corps de base (2) et maintenu dans ledit corps de base (2) par engagement géométrique, excluant au maximum toute liaison de matière, est disposé dans la zone de l'outil composite (1, 11, 21, 31) directement soumise à la contrainte de percussion, et est préfabriqué, en tant que corps massif, en matériau métallique extrêmement résistant à l'usure, différant du matériau à base de fer du corps de base (2), caractérisé en ce que le corps préformé (3, 13, 23, 33', 33", 33"') présente une forme qui s'amincit, à partir d'une surface de base (3a, 13a, 33a), en direction de la surface frontale (3b, 13b, 33b) opposée à la surface de base (3a, 13a, 33a), et en ce que les surfaces frontales (3b, 13b, 33b) sont associées à la zone (2a) de l'outil composite (1, 11, 21, 31) directement soumise à la contrainte de percussion.
  2. Outil composite selon la revendication 1, caractérisé en ce que l'alliage de fer du corps de base (2) contient en % en poids : Mn : 8, 0 - 22,0 %, Cr : 0,2 - 2,8 %, C : 0, 5 - 1,5 %,
    le complément étant du fer et des impuretés inévitables.
  3. Outil composite selon l'une des revendications précédentes, caractérisé en ce que le matériau métallique du corps préformé (3, 13, 23, 33', 33", 33"') contient en % en poins : Cr : 6,0 - 16,0 %, Mo : 0, 3 - 1,5 %, W : 0,3 - 1,4 %, C : 0,6 - 2,2 %,
    le complément étant du fer et des impuretés inévitables.
  4. Outil composite selon l'une des revendications précédentes, caractérisé en ce que, dans la zone, dans laquelle le matériau à base de fer du corps de base (2) entoure latéralement le corps préformé (3, 13, 23, 33', 33", 33"'), le rapport entre l'épaisseur moyenne (dG1, dG2) du matériau de base, mesurée dans un axe de mesure (X, Y), et l'épaisseur moyenne (dF1, dF2) du corps préformé, coulé (3, 13, 23, 33', 33", 33"'), mesurée dans le même axe, est de 0,2 à 1,0.
  5. Outil composite selon l'une des revendications précédentes, caractérisé en ce que le corps préformé (3, 13, 23, 33', 33", 33"') présente la forme d'une pyramide tronquée.
  6. Outil composite selon l'une des revendications précédentes, caractérisé en ce que des creux sont formés dans les surfaces latérales (23c, 23d, 23e, 23f) du corps préformé (23).
  7. Outil composite selon l'une des revendications précédentes, caractérisé en ce que des élévations (23h) sont formées sur les surfaces latérales (23e, 23f) du corps préformé (23).
EP04763716A 2003-08-07 2004-08-02 Outil composite pour des contraintes de percusion et/ou d'abrasion Not-in-force EP1651389B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10336169A DE10336169B4 (de) 2003-08-07 2003-08-07 Komposit-Werkzeug für schlagende und/oder abrasive Belastungen
PCT/EP2004/008648 WO2005014238A1 (fr) 2003-08-07 2004-08-02 Outil composite pour des contraintes de percusion et/ou d'abrasion

Publications (2)

Publication Number Publication Date
EP1651389A1 EP1651389A1 (fr) 2006-05-03
EP1651389B1 true EP1651389B1 (fr) 2010-12-29

Family

ID=34129501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04763716A Not-in-force EP1651389B1 (fr) 2003-08-07 2004-08-02 Outil composite pour des contraintes de percusion et/ou d'abrasion

Country Status (6)

Country Link
EP (1) EP1651389B1 (fr)
AT (1) ATE493233T1 (fr)
DE (3) DE20321302U1 (fr)
DK (1) DK1651389T3 (fr)
ES (1) ES2358594T3 (fr)
WO (1) WO2005014238A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1018129A3 (fr) 2008-09-19 2010-05-04 Magotteaux Int Impacteur composite pour concasseurs a percussion.
EP4155031A1 (fr) * 2021-09-23 2023-03-29 Sandvik Mining and Construction Oy Outil de rupture, marteau de rupture et procédé de maintien de la forme de l'outil de rupture

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE592580C (de) * 1934-02-10 Walter Huelsbruch Dr Ing Spitzeisen oder Meissel, vornehmlich fuer den Bergbau
GB643790A (en) * 1947-10-27 1950-09-27 Rip Bits Ltd Improvements in or relating to drill-bits or drill-steels having hard metal tips suitable for rock drilling
DE1133089B (de) * 1954-12-07 1962-07-12 Georg Hufnagel Fa Verfahren zum Herstellen von Werkzeugen fuer die spanabhebende Bearbeitung durch Umgiessen gesinterter Koerper, insbesondere Hartmetallkoerper
AT319149B (de) * 1972-11-24 1974-12-10 Boehler & Co Ag Geb Baggereimer
DE2829847C2 (de) * 1978-07-07 1983-05-05 Edelstahl GmbH & Co KG Techn. Beratung-Entwicklung-Verkauf, 4000 Düsseldorf Stahlmeißel
US4314616A (en) * 1980-01-28 1982-02-09 Acme-Cleveland Corporation Die-cast masonry drill with leading hard insert
DE3347501C3 (de) * 1983-12-29 1993-12-02 Uwe Christian Seefluth Bohrwerkzeug mit Hartmetalleinsatzkörper, Herstellverfahren für Hartmetalleinsatzkörper
GB2167438B (en) * 1984-10-17 1988-11-23 Bradley & Foster Ltd A method of heat treating high chromium cast ferrous-based alloys and a wearing element formed of a high chromium cast ferrous based alloy
US5238046A (en) 1990-09-20 1993-08-24 Magotteaux International Method of manufacturing a bimetal casting and wearing part produced by this method
US6216805B1 (en) * 1999-07-12 2001-04-17 Baker Hughes Incorporated Dual grade carbide substrate for earth-boring drill bit cutting elements, drill bits so equipped, and methods
US6799648B2 (en) * 2002-08-27 2004-10-05 Applied Process, Inc. Method of producing downhole drill bits with integral carbide studs

Also Published As

Publication number Publication date
ATE493233T1 (de) 2011-01-15
DE20321302U1 (de) 2006-09-14
ES2358594T3 (es) 2011-05-12
DK1651389T3 (da) 2011-03-28
DE502004012067D1 (de) 2011-02-10
DE10336169B4 (de) 2006-11-09
DE10336169A1 (de) 2005-03-10
EP1651389A1 (fr) 2006-05-03
WO2005014238A1 (fr) 2005-02-17

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