EP3908703A1 - Zahn zum anbringen an eine baggerschaufel - Google Patents
Zahn zum anbringen an eine baggerschaufelInfo
- Publication number
- EP3908703A1 EP3908703A1 EP19832065.7A EP19832065A EP3908703A1 EP 3908703 A1 EP3908703 A1 EP 3908703A1 EP 19832065 A EP19832065 A EP 19832065A EP 3908703 A1 EP3908703 A1 EP 3908703A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tooth
- insert
- metal matrix
- head
- excavator
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/285—Teeth characterised by the material used
-
- 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
- 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
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2883—Wear elements for buckets or implements in general
Definitions
- the present invention relates to a tooth for attachment to an excavator bucket of a bucket wheel excavator, the tooth being partially formed from a metal matrix composite and the metal matrix composite having an insert made of a hard material cast into a metal matrix material, the insert at least partially covering the surface of the tooth trains, as well as a method for producing such a tooth.
- Digging machines such as excavators, in particular bucket wheel excavators, are used to solve hard materials, such as rock in an open-cast mine.
- Such bucket wheel excavators have teeth, in particular digging or cutting teeth, which are attached to the excavator bucket. Machining hard materials often causes significant wear to the teeth of the excavator bucket, especially the tooth tips. There is therefore a need to replace such teeth frequently, which leads to high downtimes and maintenance costs.
- Excavator teeth are one of the most common wear parts of bucket wheel excavators that are used to extract abrasive mineral substances. To reduce the frequency of tooth changes and thus increase the availability of the excavator, excavation teeth with special wear protection are used in wear-intensive mining areas. According to the prior art, carbide-containing layers are often applied to the surface of tooth tips with a welding electrode, which envelop the tooth tip approximately evenly from all sides. Encasing quite complex tooth tip shapes with a weld coating is extremely time-consuming and costly, which leads to a multiple increase in the cost of producing the excavator teeth.
- a tooth for attachment to an excavator bucket of a bucket wheel excavator is known from DE 20 2015 006 273 U1.
- the teeth of a bucket wheel excavator are usually cast from a steel and provided with wear protection. This wear protection is often very brittle and keeps the high Load of an excavator process. The result is rapid wear and tear and even destruction of the excavator tooth.
- the insert made of the metal matrix composite is arranged at least in the area of the tooth tip of the excavator tooth and encloses this tooth tip in the area of at least two outer surfaces.
- These outer surfaces can in particular comprise two lateral cutting surfaces and optionally a lower cutting surface of the tooth, which is also referred to herein as the central ripper surface.
- three or more outer surfaces of the tooth head can be enclosed by the insert.
- a special feature of the continuously working bucket wheel excavator is the essentially repetitive digging process with roughly the same material cross-sections, cutting speeds and tooth settings.
- each excavator tooth is essentially stressed by a certain direction of movement (digging direction) and wears out accordingly.
- the shape of the tooth tip changes as a result of tooth wear, which can lead to sharp rounding of the tooth tips in the area of the cutting edges and thus to a significant increase in digging force.
- the geometric features of the insert cast into the excavator tooth which are preferred in the context of embodiment variants of the present invention, are particularly advantageous below.
- the insert preferably has a material thickness of 2 mm to 25 mm in the region of the surfaces of the tooth head or it extends over 4% to 50% of the maximum cross-sectional width, preferably it has a material thickness of 3 mm to 15 mm or extends over 6 % to 30% of the maximum cross-sectional width, particularly preferably it has a material thickness of 5 mm to 10 mm or extends over 10% to 20% of the maximum cross-sectional width.
- the top surface of the tooth head opposite the cutting speed which is also referred to herein as rear surfaces, is not covered with the insert.
- the tooth head preferably has a square cross section (cut transversely to its longitudinal direction), so that a total of four outer surfaces result. Of these four outer surfaces, two opposite surfaces are the side ones
- a third surface is the lower cutting surface (or middle one
- Ripper surface and a fourth surface is the upper (rear) surface of the tooth, wherein this rear surface can be concavely curved, for example.
- This rear surface of the tooth head is preferably not with the insert from the
- Metal matrix composite provided, while the other three surfaces (the three aforementioned cutting surfaces) are provided with the metal matrix composite.
- the insert made of the metal matrix composite preferably has a V-shape or a trapezoidal shape when viewed in a sectional plane transverse to the tooth longitudinal direction.
- the insert is bowl-shaped, that is to say that the insert surrounds a core of the excavator tooth head in a shell-like manner and with a defined material thickness, this core preferably consisting of a metallic material, in particular a cast material, which can be the metal matrix material.
- the insert made of the metal matrix composite material has a greater material thickness in the region of the tip of the tooth head than in other regions of the tooth head.
- the material thickness of the insert decreases from the tip of the tooth tip, for example towards the tooth shaft.
- the insert made of the metal matrix composite material has a greater proportion of hard material in the region of the tip of the tooth head than in other regions of the tooth head. The tip of the tooth head is the first to come into contact with the abrasive mineral substances to be removed and is therefore exposed to the greatest wear.
- the present invention may be advantageous if the material thickness of the insert made of the metal matrix composite material gradually decreases from the tip of the tooth head to the end region of the tooth head facing the tooth shaft.
- the material thickness of the insert made of the metal matrix composite decreases continuously, in particular runs out, towards the rear end region of the tooth head. This can reduce the likelihood of cracking in these areas.
- Tooth wear protection coating in which an insert made of a metal matrix composite material is introduced, in particular in the area of the tooth head, before casting into the tooth casting mold and then enclosed in the casting process with the metallic casting material.
- the hard materials already contained in the metal matrix composite or formed during the casting process such as tungsten carbide, chromium carbide, titanium carbide or the like, with a volume fraction of, for example, 20 to 80%, are distributed in the casting material as a matrix and fixed after cooling.
- At least one tooth for attachment to an excavator bucket of a bucket wheel excavator is thus formed from a metal matrix composite material in accordance with a preferred variant of the present invention, the metal matrix composite material having an insert made of a hard material cast into a metal matrix material.
- the insert is a wear protection element.
- the insert is at least partially enclosed with the cast material, namely the metal matrix material.
- Hard materials include, for example, ceramics, diamonds, carbides or nitrides. Hard materials in particular have a hardness of 950HV30 to 2200 HV30, preferably 1500HV30 to 2200HV30.
- the metal matrix composite material preferably consists exclusively of one or more inlays and a metal matrix material.
- the entire tooth is made entirely of the metal matrix composite material.
- the tooth preferably has a tooth head and an adjoining tooth shaft.
- the toothed shaft is preferably designed such that it can be connected to an excavator shovel.
- only the tooth tip is formed from the metal matrix composite material, the tooth shaft being forged, for example.
- the tooth head is connected to the tooth shaft by means of welding.
- a forged tooth shaft has better mechanical properties than a cast tooth shaft, which prevents breakages in the shaft area, for example.
- the material to be mined with the bucket wheel excavator is, for example, hard rock, such as mineral material, ores, coal, oil sand, limestone, marl, clay, chalk, plaster and similar raw materials.
- the insert comprises, for example, a hard material from the following list comprising diamond, tungsten carbide, titanium carbide, boron carbide, niobium carbide, chromium carbide, vanadium carbide, silicon carbide, zirconium carbide, tantalum carbide, boron nitride, silicon nitride, titanium nitride, and / or ceramics, such as aluminum and / or zirconium oxide, or a mixture of these materials.
- a hard material from the following list comprising diamond, tungsten carbide, titanium carbide, boron carbide, niobium carbide, chromium carbide, vanadium carbide, silicon carbide, zirconium carbide, tantalum carbide, boron nitride, silicon nitride, titanium nitride, and / or ceramics, such as aluminum and / or zirconium oxide, or a mixture of these materials.
- the insert comprises a hard material from the following list comprising diamond, tungsten carbide, titanium carbide, boron carbide, niobium carbide, chromium carbide, vanadium carbide, silicon carbide, zirconium carbide, tantalum carbide, boron nitride, silicon nitride, titanium nitride, or ceramic, such as aluminum oxide and / or zirconium oxide, or one Mixture of these materials.
- the insert comprises about 20% to 80%, preferably 30% to 75%, most preferably 45% -55% tungsten carbide, the remaining component of the insert being mainly carbon with a balance.
- the insert comprises approximately 20% to 80%, preferably 30% to 75%, most preferably 45% to 55% titanium carbide, the remaining component of the insert being mainly carbon with a remainder.
- the preceding information is percentages by volume.
- the insert has, in particular, a porous structure, the insert preferably having a plurality of pores which are, for example, evenly distributed and / or formed.
- the pores are honeycomb-shaped.
- the insert is preferably formed in one piece.
- the tooth is preferably formed in one piece and produced by a casting process.
- a metal matrix composite material is to be understood as a material made of a metal matrix material such as steel, in which the insert is cast from a hard material.
- the metal matrix material is, for example, a steel with a hardness of approximately 200-600 HB, in particular 350-500 HB, preferably 450 HB (Brinell) and, for example, an elongation at break of greater than or equal to 1 -15%, in particular 2-8% .
- Forming the tooth from a metal matrix composite offers the advantage of being easy to manufacture and of high wear protection, which results from the insert formed from a hard material.
- the insert is made from a powdery and / or granular mixture of, for example, a hard material or tungsten, chromium, niobium vanadium, boron, titanium, silicon tantalum or from a mixture of these elements by heating.
- the insert is produced from a powdery mixture of tungsten, chromium, niobium vanadium, boron, titanium, silicon tantalum or from a mixture of these elements by heating. It is also conceivable to produce the insert from a granular mixture of tungsten, chromium, niobium vanadium, boron, titanium, silicon tantalum or from a mixture of these elements by heating.
- the powdery material from one or a mixture of two or more elements selected from tungsten, chromium, niobium, vanadium, boron, titanium, silicon or tantalum is preferably mixed with an additive / reactant such as carbon and / or nitrogen and to the insert , preferably a precursor of the insert is pressed, glued or sintered.
- the insert is then placed in a casting mold that corresponds to the negative shape of the tooth and poured with the hot metal matrix material, so that the insert is enclosed by the metal matrix material and the metal matrix material at least partially infiltrates into the insert, so that the metal matrix material penetrates into the pores of the porous ones Insert and fills it out.
- the heat acting on the pressed, glued or sintered materials in the casting process ensures a reaction between the various elements and their reaction partners, so that, for example, wear-resistant carbides and nitrides, such as tungsten carbide, titanium carbide, boron carbide, niobium carbide, chromium carbide, vanadium carbide, silicon carbide, tantalum carbide , Boron nitride, titanium nitride, silicon nitride and / or a mixture of these arise.
- the carbides and nitrides form the insert within the metal matrix material.
- the insert consist, for example, of a powdery and / or granular mixture of particles (grains), in particular hard materials comprising ceramic, such as aluminum and zirconium oxide or hard metal, preferably carbides and nitrides such as tungsten carbide, titanium carbide, boron carbide, niobium carbide, chromium carbide , Vanadium carbide, silicon carbide, zirconium carbide, tantalum carbide, boron nitride, silicon nitride and / or titanium nitride, or a mixture of these compounds, the mixture being mixed, for example, with a binder, heated, in particular gassed, and baked.
- ceramic such as aluminum and zirconium oxide or hard metal
- carbides and nitrides such as tungsten carbide, titanium carbide, boron carbide, niobium carbide, chromium carbide , Vanadium carbide, silicon carbide, zirconium carbide, tantalum carbide
- the mixture is preferably heated in a flexible form, for example, which corresponds to the negative form of the insert.
- the insert is produced by pressing, gluing or sintering the aforementioned powdery material and into the mold that the Corresponds to the negative form of the tooth, inserted.
- Granular tungsten carbide, titanium carbide or niobium carbide is preferably mixed with a binder, heated, in particular gassed, and baked. The insert is then enclosed in the casting mold by the metal matrix material and at least partially infiltrated.
- a porous structure of the insert should not be understood to mean that it inevitably has pores filled with air; rather, the pores are ideally all, realistically for the most part, filled with the metal matrix, which penetrates into the porous structure of the hard material in the manufacturing process described above .
- the insert forms the surface of the tooth at least partially or completely.
- the insert on the surface of the tooth is at least partially covered with the metal matrix material.
- the metal matrix material is preferably a ductile, softer material than the material of the insert, which is why the metal matrix material wears out faster than the insert and is washed out, for example, from the pores arranged on the surface of the tooth.
- the tooth is partially or completely produced by a casting process.
- the tooth head is made by a casting process.
- the insert is positioned in a mold that has the negative shape of the tooth.
- the metal matrix material is then poured into the casting mold so that it infiltrates into the pores of the insert and at least partially or completely encloses the insert with the metal matrix material.
- the casting process represents a particularly simple way of producing the tooth, the insert being able to be placed at any point within the casting mold in a simple manner, and wear protection can thus be achieved at any point on the tooth.
- the tooth has a plurality of deposits.
- the plurality of deposits comprises a plurality of particles, in particular hard material particles.
- An insert formed from a particle preferably has a size of 0.2 microns to 6 microns, the particles being produced, for example, by carburizing tungsten with carbon.
- Each insert preferably consists of exactly one particle, the deposits being arranged in a disordered manner in the matrix material.
- the tooth has exactly one insert. For example, three inlays are arranged within the tooth, which preferably extend along the surface of the tooth. A large number of inserts offers the possibility of arranging them where the wear is greatest. The remaining areas of the tooth can be cast with the less expensive metal matrix material.
- the insert has a thickness of approximately 5 mm to approximately 50 mm, preferably approximately 5 mm to approximately 25 mm. The insert preferably extends over the entire width of the tooth head.
- the insert extends at least partially or completely in the longitudinal direction of the tooth along the surface.
- the insert extends completely over the entire extent of the tooth head.
- the tooth preferably has only one insert, which is the simplest and most cost-effective embodiment of the tooth.
- the tooth has a tooth head, the insert being arranged in the tooth head.
- the tooth head preferably has a cutting surface which ensures improved removal of the material.
- the tooth head preferably points in the direction of rotation of the excavator bucket of the bucket wheel excavator and comes into contact with the material during the excavation process.
- the tooth preferably has a tooth shaft with a fastening region at one end and the tooth head at its opposite end.
- the toothed shaft preferably has means for attaching the tooth to an excavator bucket.
- only the tooth head has an insert, the tooth shaft being formed exclusively from the matrix material.
- the tooth head and the tooth shaft are formed in one piece, preferably cast. Also a two-part io
- the insert preferably forms at least partially the surface of the tooth head and extends in particular along the entire surface of the tooth head.
- One or more deposits are preferably arranged in the tooth head.
- the tooth head has a cutting surface which comes into contact with the material when the material is removed and in particular cuts it.
- the insert at least partially forms the cutting surface.
- the tooth head preferably has a multiplicity of cutting surfaces, for example three cutting surfaces.
- the insert preferably extends completely along the entire cutting surface of the tooth head.
- the insert has a V-shaped cross section and is designed in the form of a shell. All of the outer surfaces of the tooth head are preferably cutting surfaces and the insert is, for example, designed in the form of a shell so that it extends along the outer surfaces of the tooth head.
- the insert is preferably formed in one piece and the tooth in particular has exactly one insert.
- the core of the tooth is preferably formed exclusively from the metal matrix material, the insert being arranged only on the regions of the surface of the tooth.
- a plurality of inlays are arranged on each cutting surface of the tooth.
- the inserts are preferably plate-shaped and in particular are arranged next to one another.
- the tooth head has a plurality of cutting surfaces, at least one cutting surface being largely made of the metal matrix material.
- a large part is understood to mean, for example, more than 60% to 95%, preferably 70% to 90%, in particular 80%.
- at least one cutting surface or a plurality of outer surfaces are not additionally provided with an insert, which in particular extend completely along the cutting surfaces.
- a cutting surface of the tooth head will wear out more during operation of the tooth than the other cutting surfaces equipped with the insert, thereby sharpening the tooth, preferably the cutting shape of the tooth.
- the present invention furthermore relates to an excavator bucket for attachment to a bucket wheel frame of a bucket wheel excavator, which has at least one tooth of the type described above.
- a plurality of teeth described above are attached to each bucket.
- at least one tooth or each tooth of an excavator bucket has an insert embedded in matrix material.
- the present invention furthermore relates to a method for producing a tooth for attachment to an excavator bucket of a bucket wheel excavator, comprising the steps:
- the insert is made from a powdery and / or granular mixture of a hard material before positioning, for example by means of gluing, pressing or sintering.
- the tooth has a tooth head and a tooth shaft, the tooth head being produced by casting and the tooth shaft being forged, the tooth head subsequently being connected, preferably welded, to the tooth shaft.
- Figure 1 is a schematic representation of a bucket wheel of a bucket wheel excavator with a plurality of excavator buckets in a front view according to an embodiment of the present invention
- FIG. 2 shows a schematic illustration of a tooth for attachment to an excavator bucket of a bucket wheel excavator in a side view according to an exemplary embodiment of the present invention
- Figure 3 is a plan view of the excavator tooth shown in Figure 2;
- FIG 4 is a schematic partial view of an excavator tooth according to the embodiment of Figure 2, the excavator tooth in the front region of the tooth head is shown in section.
- FIG. 1 This illustration shows a bucket wheel 10, for example of a bucket wheel excavator for dismantling bulk material or a bridge bucket wheel device for reloading bulk material, in particular in an open-cast mine or a storage location.
- Such paddle wheels are preferably used for mining or reloading minerals, ores, sand, clay, gravel, oil sand, coal or other granular materials.
- the paddle wheel 10 of FIG. 1 has a paddle wheel frame 18 which is essentially ring-shaped and, for example, has a plurality of segments in the form of part circles.
- a plurality of excavator blades 12 are attached to the bucket wheel frame 18.
- Each blade 12 has eight blades 12, which are attached to the outer circumference of the paddle wheel frame 18 at a uniform distance from one another.
- Each blade 12 can be attached to the blade wheel frame 18 so as to be rotatable about a pivot axis.
- the paddle wheel 10 rotates around the central axis of the paddle wheel frame during operation. In the example in FIG. 1, the direction of rotation is given, for example, in the clockwise direction.
- Each excavator bucket 12 preferably has a plurality of excavator teeth 20 in the front region at the cutting edge 14 of the bucket 12, where this bucket 12 engages in the material to be removed.
- FIGS. 2 to 4 One of these teeth 20 attached to the excavator bucket 12 is shown in detail in FIGS. 2 to 4, to which reference is made below.
- Figures 2 to 4 show a tooth 20 for attachment to an excavator bucket, not shown.
- the tooth 20 comprises a tooth head 22 and a tooth shaft 24, the tooth head 22 being formed, for example, in one piece with the tooth shaft 24. It is also conceivable to design the tooth shaft 24 and the tooth head 22 as separate components and then to connect them to one another, for example by welding.
- the tooth shaft 24 preferably adjoins the tooth head 22 and serves in particular to fasten the tooth 20 to an excavator bucket 12 of a bucket wheel excavator.
- the tooth head 22 forms the front end of the tooth 20 which, in the operation of the tooth 20, points in the direction of rotation of the impeller 10.
- the tooth head 22 is tooth-shaped and tapered in the direction of the tip of the tooth 10.
- the tooth head 22 has, for example, a triangular or quadrangular cross-sectional area.
- the tooth head 22 preferably has four outer surfaces, namely two opposite, lateral cutting surfaces 26, an upper surface 28 which is arranged opposite the cutting speed and is therefore referred to herein as the rear surface 28 and a lower surface which is referred to herein as the central ripper surface 30 becomes.
- the tooth shaft 24 has two legs 30, 32, for example, which extend parallel to one another. Each of the legs 32, 34 has bores 36, 38, the respective bores 36, 38 of the other leg 32, 34 are in particular opposite one another.
- the bores 36, 38 serve to receive fastening means (not shown) for fastening the tooth 22 to an excavator bucket 12.
- the tooth 20 preferably has a stop 40 at the end region of the tooth shaft 24, which serves to position the tooth 20 on the excavator bucket 12 and in the case of a tooth 20 mounted on an excavator bucket 12, in particular on the latter the cutting edge 14 of the excavator bucket 12 abuts.
- the toothed shaft is preferably fastened to the cutting edge 14 of the excavator bucket 12.
- the tooth 20 is formed from a metal matrix composite material, the metal matrix composite material having an insert 44 made of a hard material and cast into a metal matrix material 42.
- the insert is preferably made of a hard material and has a porous structure.
- the hard material includes, for example, tungsten carbide, ceramic, such as aluminum and zirconium oxide, titanium carbide, boron carbide, niobium carbide or chromium carbide, or a mixture of these materials.
- the metal matrix material 28 comprises a more ductile material than the insert 44, such as steel, and is cast into the insert 44.
- the metal matrix material 42 is in particular infiltrated into the insert 44, a cohesive, firm connection between the inserts 44 being produced from a hard material and the metal matrix material 28.
- the tooth 20 is preferably produced by a casting process and in particular is formed in one piece.
- the at least one insert 44 is produced from a powdery and / or granular mixture of particles (grains) comprising tungsten carbide, ceramic, such as aluminum and zirconium oxide, titanium carbide, boron carbide, niobium carbide or chromium carbide, or from a mixture of these materials, whereby the Mixture, for example, mixed with a binder, heated, in particular gassed, and baked. In particular, the mixture is heated in a flexible form, for example, which corresponds to the negative form of the insert 44. The mixture then cools down and hardens to a very wear-resistant body with a porous structure.
- the insert 44 is placed in a casting mold which corresponds to the negative shape of the tooth 20.
- the metal matrix material is then poured into the casting mold so that it is filtered into the insert 44 and at least partially or completely surrounds it.
- the insert 44 is designed such that it extends over the entire cutting surface of the tooth 20 (see also FIG. 4).
- the insert 44 preferably forms at least partially the lateral cutting surfaces 26 and the middle ripper surface 30 on the underside of the tooth head 22 and is formed in one piece. It is also conceivable for the insert to be formed from a plurality of segments which are arranged next to one another.
- the insert 44 is poured into the metal matrix material 28 so that it preferably infiltrates into the insert.
- the entire tooth 20 is formed from the metal matrix composite material.
- the rear surface 28 of the tooth head 22 has, for example, no insert 44, only the upper ends of the inserts 44 of the cutting surfaces 26 forming part of the rear surface 28 of the tooth head 22.
- the rear surface 28 is formed in large part or entirely from the metal matrix material.
- FIG. 4 shows the tooth 20 according to FIG. 2 in a sectional view, the same elements being identified by the same reference numerals.
- the insert 44 extends over the entire surface of the cutting surfaces 26 and the central ripper surface 30 on the underside of the tooth and is preferably designed in the form of a shell and in one piece.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202019103058 | 2019-01-11 | ||
| DE102019207962.8A DE102019207962B4 (de) | 2019-01-11 | 2019-05-29 | Zahn zum Anbringen an eine Baggerschaufel |
| PCT/EP2019/085953 WO2020144028A1 (de) | 2019-01-11 | 2019-12-18 | Zahn zum anbringen an eine baggerschaufel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3908703A1 true EP3908703A1 (de) | 2021-11-17 |
| EP3908703B1 EP3908703B1 (de) | 2023-01-25 |
Family
ID=69105819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19832065.7A Active EP3908703B1 (de) | 2019-01-11 | 2019-12-18 | Zahn zum anbringen an eine baggerschaufel |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3908703B1 (de) |
| CN (1) | CN113302365B (de) |
| WO (1) | WO2020144028A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3915684A1 (de) * | 2020-05-29 | 2021-12-01 | Magotteaux International SA | Verschleissteil aus verbundwerkstoff |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2608111A (en) * | 1947-06-17 | 1952-08-26 | American Brake Shoe Co | Repointer bar and method of repointing teeth |
| FR2667088B1 (fr) * | 1990-09-20 | 1994-10-14 | Technogenia Sa | Dent pour outil d'excavation. |
| US5896911A (en) * | 1996-03-29 | 1999-04-27 | Caterpillar Inc. | Process for making a selectively reinforced ground engaging tool component |
| JP3676530B2 (ja) * | 1996-12-26 | 2005-07-27 | 株式会社小松製作所 | 掘削バケット装置 |
| CN101153497A (zh) * | 2006-09-26 | 2008-04-02 | 宁波浙东精密铸造有限公司 | 一种斗齿与齿座的连接结构 |
| CN201459801U (zh) * | 2009-09-10 | 2010-05-12 | 佳木斯大学 | 一种镶铸复合金属耐磨铲齿 |
| CN102797271B (zh) * | 2012-08-15 | 2015-01-07 | 北京二七轨道交通装备有限责任公司 | 轮缘铲斗式挖掘装置及挖掘机 |
| DE202015006273U1 (de) | 2015-09-10 | 2015-10-08 | Thyssenkrupp Ag | Zahnanordnung zum Anbringen an eine Baggerschaufel oder eine Brechwalze |
| US20170233986A1 (en) * | 2016-02-15 | 2017-08-17 | Caterpillar Inc. | Ground engaging component and method for manufacturing the same |
| DE102017210780B3 (de) * | 2017-06-27 | 2018-05-17 | Thyssenkrupp Ag | Brechwerkzeug sowie Verfahren zum Herstellen eines Brechwerkzeugs |
-
2019
- 2019-12-18 CN CN201980088495.9A patent/CN113302365B/zh active Active
- 2019-12-18 EP EP19832065.7A patent/EP3908703B1/de active Active
- 2019-12-18 WO PCT/EP2019/085953 patent/WO2020144028A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN113302365B (zh) | 2023-03-10 |
| EP3908703B1 (de) | 2023-01-25 |
| CN113302365A (zh) | 2021-08-24 |
| WO2020144028A1 (de) | 2020-07-16 |
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