EP3048242B1 - Wear protection cap - Google Patents
Wear protection cap Download PDFInfo
- Publication number
- EP3048242B1 EP3048242B1 EP15181472.0A EP15181472A EP3048242B1 EP 3048242 B1 EP3048242 B1 EP 3048242B1 EP 15181472 A EP15181472 A EP 15181472A EP 3048242 B1 EP3048242 B1 EP 3048242B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- wear protection
- protection cap
- top wall
- wear
- 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.)
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Links
- 230000007704 transition Effects 0.000 claims description 32
- 238000003754 machining Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 description 18
- 239000000463 material Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000003801 milling Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000013459 approach Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005242 forging Methods 0.000 description 3
- 238000005058 metal casting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000834 fixative Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H3/00—Storage means or arrangements for workshops facilitating access to, or handling of, work tools or instruments
- B25H3/003—Holders for drill bits or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape
Definitions
- the invention relates to a wear protection cap for a chisel holder assembly.
- a bit holder arrangement is known. This includes a base part and a chisel holder.
- the base part can be welded onto the outer surface of a milling drum tube. Then, the chisel holder can be replaceably attached to the base part.
- On the surface of the milling drum tube a plurality of bit holder assemblies are fixed. They are preferably placed against each other so that the base parts form a clearing and Lade Listel.
- a chisel preferably a rotatable round shank chisel, be interchangeable recorded.
- the material causes depending on its nature, a different levels of wear due to Abrassionsvorêtn. While softer formations such as coal tend to be less worn, significant wear can occur in iron ore containing materials.
- the chisels are subject to particularly severe wear and must therefore be changed at regular intervals.
- the chisel holders are designed to last the life of a large number of chisels.
- the base part as the most expensive unit of the bit holder arrangement should offer a particularly long service life. In order to delay the cost-intensive exchange of the base parts, it is known from the prior art to weld armor plates in the form of steel sheets on particularly endangered areas of the base parts.
- a wear protection cap which is designed as a forged part and has a wall portion with regions with different wall thickness. Two mutually spaced side walls are formed as wall sections and transferred via transition sections in the top wall.
- a wear protection cap which has three mutually angled side walls, which are merged into a top wall. In the top wall an opening is incorporated.
- the protective cap serves to cover a chisel holder. Through the opening a chisel can be inserted through its chisel shaft into a hole in the chisel holder.
- a wear protection cap which has wall sections for covering surface areas of the base part of the bit holder arrangement, wherein the wall sections are integrally connected to one another.
- the wear protection cap is designed as a casting or as a forged part, wherein a wall portion forms a top wall, which merges into a thickening, facing away from the thickening of the top wall, a front wall is connected as a further wall portion, wherein the front wall and the top wall are at an angle.
- Two mutually spaced side walls are formed as wall sections and are transferred via transition sections in the top wall. In the transition region between at least one of the side walls and the top wall, a thickening is arranged, which merges into the thickening in the transition region between the top wall and the front wall.
- the wear protection cap is designed as a metal casting or metal forged part, uniform material properties can be achieved both in the region of the wall sections and in the region of the transition regions connecting the wall sections. Accordingly, both the wall portions and the transition areas between the wall portions provide equal material wear characteristics. Furthermore, with the wear protection caps in the form of metal castings or metal forgings various design variations can be achieve that are not feasible with the known sheet steel parts so.
- the wall sections are wear-optimized with different wall thickness, in particular a varying wall thickness curve formed. Accordingly, zones of greater wall thickness are pronounced in areas where heavy wear occurs. Zones that are exposed to less Abrassion, however, can be performed with a thinner cross-section material optimized.
- the transitions between two wall sections are also designed with a larger wall thickness than at least one of the wall sections in order to provide a special wear protection here.
- the wear protection cap is, as mentioned above, formed as a casting or as a metal forging. Accordingly, the wear protection cap is designed as a hot-formed part, in particular as a forged part, since higher wear resistance can be achieved here. Furthermore, can be realized with forged parts more diverse design options, such as varying cross-sectional profiles, as mentioned above.
- a particularly preferred variant of the invention provides that the wall sections are arranged such that they are suitable for forming a form-locking connection in the direction of the forces acting on the wear protection cap with the bit holder arrangement during the machining operation. In this way, a quasi-self-fixing construction of the wear protection cap is achieved.
- the wear protection cap can accordingly be fastened to the bit holder arrangement with simply designed fixing means.
- these fixing agents can be accommodated in areas where there is little risk of wear.
- this Relation and also in connection with other variants of wear protection caps described in this patent application can be used as a fixative welds, in particular stitching or stitching points that connects the wear protection cap with the bit holder assembly.
- the wear protection cap is adapted for use on a base portion of the bit holder assembly. Here it offers effective protection of the comparatively expensive component of the bit holder arrangement.
- the wear protection cap has on the base part a wall portion in the form of a top wall, which merges via a transition section in a thickening, the thickening of the top wall turns away turned away in a front wall as a further wall section at an angle.
- This construction protects the extremely wear-prone front area of a base part.
- the thickening in the transition region between the top wall and the wall section brings an additional wear volume in favor of a long service life.
- the thickening forms a rounding transition to minimize the Abrassionsvortician here.
- two spaced-apart side walls are formed as wall sections and are transferred via transition sections in the top wall.
- the side walls protect the side areas of the base part and are thus ultimately associated with the transport area of the clearing and loading spiral of a milling drum.
- the side walls form a positive connection between the wear protection cap and the bit holder arrangement against forces acting laterally.
- thickenings are provided in the transition region between the side walls and the top wall. Due to the pitch of the spiral clearing and loading helices, a pressure side facing the delivery area is created, at which a particularly heavy wear takes place. Especially In this area of the pressure side, the provision of a thickening is advantageous.
- the top wall is recessed in a trough-like manner by means of the transition regions which lead into the thickenings.
- an expansion area for the bypassed waste material is formed in favor of less abrasion.
- the thickenings provide a protective barrier for the regions of the top wall which are in the opposite direction to the direction of movement, so that these regions are made wear-optimized.
- a screw connection can be arranged in the trough-like region, which fixes a bit holder of the bit holder arrangement on the base part.
- the base parts may be fixed to each other on the surface of the milling drum tube to form a clearing and loading helix.
- a recess is formed in a wear protection cap according to the invention in the transition region between the front wall and a laterally adjoining side wall. In the region of the recess, the base parts can be placed next to one another.
- Fig. 1 shows a bit holder assembly, as is typically used in a surface miner.
- the bit holder arrangement has a base part 10 and a bit holder 40.
- the base part 10 is formed in one piece and has two side parts 11. These are arranged spaced from each other. Between the side parts 11, a plug-in receptacle 13 is formed. In the region of its underside 12, the base part 10 is provided with a concave surface. With this concave surface, the base part 10 can be placed flat on the surface of a not shown Fräswalzenrohres. It can then be fixed there on the Fräswalzenrohr with welds. In the region of its front side, the base part 10 has a front attachment to the side parts 11. This approach is bounded on the front side by a front surface 15 and a further front surface 16.
- the two front surfaces 15 and 16 are at an angle to each other and are via a transition section 15.1 merged into each other.
- the transition section 15.1 is designed as a rounding transition.
- two mutually parallel spaced threaded receptacles 14 are introduced into the front approach of the base part 10.
- the threaded receptacles 14 open in the region of the plug-in receptacle 13 Fig. 2 can still recognize, the outer surfaces of the side parts 11 are passed over rounding transitions 15.2 in the front surfaces 15 and 16.
- the front attachment forms two mutually angled support surfaces 13.1.
- the support surfaces 13.1 may be formed as flat surfaces.
- the plug-in receptacle 13 is also limited by two support surfaces 13.2. These two support surfaces 13.2 may also be formed flat and may extend in the direction of the central longitudinal axis of the plug-in receptacle 13. In the region of its rear side, the base part 10 is closed with a rear wall which forms a rear end surface 17.
- the wear protection cap 20 With the base part 10, the wear protection cap 20 can be installed. As Fig. 2 can recognize, the wear protection cap 20 is integrally formed. It has a cover wall 21, which merges on the front side via a rising transition region 23 into a thickening 24.1.
- the thickening 24.1 serves to increase the material thickness of the wear protection cap 20. Accordingly, the wear protection cap 20 in the region of the thickening 24.1 has a greater wall thickness than the cover wall 21.
- the top wall 21 also passes over a transition region 23 in a thickening 24.2. Here, too, a thickened cross-sectional area is formed.
- the top wall 21 is provided with two arcuate recesses 22.
- the wear protection cap 20 has two side walls 27 and 28, which are arranged spaced from each other. Front side, the wear protection cap 20 is closed with a front wall 26. The side walls 27, 28 each go through rounding transitions 29 in the cover side of the wear protection cap 20 over. The side wall 28 passes via the rounding transition 29 directly into the top wall 21. The side wall 27 merges via the rounding transition 29 in the thickening 24.2. Furthermore, the front wall 26 passes over the rounding transition 25 in the thickening 24.1.
- Fig. 2 shows further that the Verschißißterrorismkappe 20 has a recess 20.1 in the region of the front wall 26 and in the front side region of the side wall 28.
- bit holder 40 of the bit holder assembly is shown in exploded perspective view.
- the bit holder 40 has a holding projection 44, to which an insertion projection 41 is integrally formed.
- the retaining lug 44 has a bit holder 45 in the form of a bore.
- Around the bore entry of the bit holder 45 around an annular seat 45.1 is arranged.
- the retaining lug 44 forms a inclined to the central longitudinal axis of the bit holder 45 extending discharge surface 46.
- the discharge surface 46 is the deck side in a lateral surface 47 and laterally in side parts 48 via.
- the retaining lug 44 has in the region of its underside two angularly arranged support surfaces 43.
- the plug-in projection 41 has at the rear two mutually angled salaried bearing surfaces 41.1.
- the pressure surfaces 42 extend at an angle of less than 90 ° to the central longitudinal axis of the plug-in extension 41.
- the bit holder 40 can be installed with the above-described base part 10.
- the bit holder 40 is inserted with its plug-in projection 41 in the plug-in receptacle 13 of the base part 10.
- the bit holder 40 is supported with its bearing surfaces 41.1 flat on the support surfaces 13.2 and with its two support surfaces 43 on the surface of the support surfaces 13.1 from.
- two fastening screws 30 see Fig.
- a wear protection cap 50 can be installed with the bit holder 40.
- This wear protection cap 50 is detailed in the Fig. 6a to 6e shown.
- the wear protection cap 50 has a front wall 54 which is pierced by an opening 51.
- the opening 51 is bounded by an annular peripheral edge 52.
- the front wall 54 has a chamfer 53.
- the front wall 54 forms laterally spreading wing-like approaches, as the Fig. 6b For example, lets recognize.
- rearwardly projecting side walls 57 are integrally formed.
- the side walls 57 are also integrally connected to a top wall 55.
- the top wall 55 is also integrally connected to the front wall 54 in connection.
- the front wall 54 has a convex elevation. In the area of the convex elevation, a recess 56 is provided at the rear.
- Fig. 5 shows further that the wear protection cap 50 are attached to the bit holder 40.
- the front wall 54 sits with its rear side on the discharge surface 46.
- the top wall 55 is supported on the lateral surface 47.
- the two side walls 57 face the outsides of the side parts 48.
- welds are again provided on wear-prone locations. These connect the wear protection cap 50 with the bit holder 40.
- the opening 51 of the wear protection cap 50 provides access to the bit receptacle 45.
- the opening 51 is dimensioned so that the seat 45.1 is free.
- This can be connected to the bit holder 40 a round shank chisel.
- the round shank chisel can be held with its round shank in the chisel holder 45, wherein the round shank chisel with its chisel head simultaneously supported on the seat surface 45.1.
- wear caps 20 and 50 wear during operation, so they can be replaced if necessary.
- the connecting means for example, here, the stitching seams must be separated. This can be done on site with a corresponding cutting device.
- the worn wear caps 20 and 50 can then be replaced with new wear caps 20, 50. These are then fastened to the base part 10 and the bit holder 50 again. This repair can be done with a short repair time, reducing machine downtime.
- the wear protection cap 20 has, in the context of the invention as wall sections, the side walls 27, 28, the front wall 26 and the top wall 21.
- the wear protection cap 50 has as wall sections the front wall 54, the top wall 55 and the side walls 57.
- the wall sections of the wear protection cap 20 are integrally connected to one another, wherein the wear protection caps are formed as a metal casting or metal forging.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Knives (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Percussive Tools And Related Accessories (AREA)
- Component Parts Of Construction Machinery (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Description
Die Erfindung betrifft eine Verschleißschutzkappe für eine Meißelhalter-Anordnung.The invention relates to a wear protection cap for a chisel holder assembly.
Aus der
Das Material bewirkt abhängig von seiner Beschaffenheit einen unterschiedlich starken Verschleiß infolge von Abrassionsvorgängen. Während bei weicheren Formationen, wie beispielsweise Kohle ein eher geringerer Verschleiß auftritt, kann bei eisenerzhaltigen Materialien ein erheblicher Verschleiß stattfinden. Die Meißel sind einem besonders starken Verschleiß unterzogen und müssen daher in regelmäßigen Abständen gewechselt werden. Die Meißelhalter hingegen sind so konzipiert, dass sie die Laufzeit einer Vielzahl von Meißeln überstehen. Das Basisteil als teuerste Einheit der Meißelhalter-Anordnung soll eine besonders lange Standzeit bieten. Um den kostenintensiven Tausch der Basisteile zu verzögern, ist es aus dem Stand der Technik bekannt, Panzerplatten in Form von Stahlblechen auf besonders gefährdete Bereiche der Basisteile aufzuschweißen. Dieser Vorgang bei der Erstbestückung einer Fräswalze ist zeitaufwendig, da eine Vielzahl von filigranen Bauteilen gehandhabt werden müssen, jedoch kann hierdurch eine längere Standzeit erreicht werden. Es hat sich allerdings gezeigt, dass insbesondere im Bereich der Schweißnähte die Bleche einem erhöhten Verschleiß unterzogen sind. Durch die Wärmeeinwirkung infolge des Schweißvorganges reduziert sich die Festigkeit des Stahlbleches in dem an die Schweißnaht anschließenden Bereich. Dementsprechend entsteht hier, verglichen zu den übrigen Flächenbereichen des Stahlbleches ein stärkerer Verschleiß. Die Panzerplatten lösen sich dementsprechend durch Bauteilversagen nach einer gewissen Einsatzdauer unkontrolliert vom Basisteil. Der Einsatz von Schweißzusatzwerkstoff ist zeit- und kostenintensiv und erhöht damit den Teileaufwand.The material causes depending on its nature, a different levels of wear due to Abrassionsvorgängen. While softer formations such as coal tend to be less worn, significant wear can occur in iron ore containing materials. The chisels are subject to particularly severe wear and must therefore be changed at regular intervals. The chisel holders, on the other hand, are designed to last the life of a large number of chisels. The base part as the most expensive unit of the bit holder arrangement should offer a particularly long service life. In order to delay the cost-intensive exchange of the base parts, it is known from the prior art to weld armor plates in the form of steel sheets on particularly endangered areas of the base parts. This process in the Erstbestückung a milling drum is time-consuming, since a variety of filigree components must be handled, however, this can be achieved by a longer life. However, it has been shown that especially in the area of the weld seams the sheets are subject to increased wear. The heat generated by the welding process reduces the strength of the steel sheet in the area adjacent to the weld. Accordingly, there is a greater wear here compared to the other surface areas of the steel sheet. The armor plates accordingly solve uncontrolled by component failure after a certain period of use of the base part. The use of filler metal is time consuming and costly and thus increases the parts cost.
Aus dem Stand der Technik sind auch noch weitere Verschleißschutzsysteme bekannt. So werden beispielsweise Auftragsschweißungen unmittelbar auf Meißelhalter oder Basisteile von Meißelhalter-Anordnung aufgebracht. Hierdurch kann ein effektiver Verschleißschutz erreicht werden, jedoch ist der Aufwand zum Aufbringen der Schweißungen erheblich.From the state of the art also other wear protection systems are known. For example, build-up welds directly on chisel holder or base parts applied by chisel holder assembly. In this way, an effective wear protection can be achieved, but the cost of applying the welds is considerable.
Aus dem Stand der Technik
Aus der
Es ist Aufgabe der Erfindung, ein Verschleißschutzsystem für eine Meißelhalter-Anordnung bereitzustellen mit dem ein effektiver und langlebiger Schutz der Meißelhalter-Anordnung erreicht werden kann.It is an object of the invention to provide a wear protection system for a bit holder assembly with which an effective and durable protection of the bit holder assembly can be achieved.
Diese Aufgabe wird mit einer Verschleißschutzkappe gelöst, die Wandabschnitte zur Abdeckung von Flächenbereichen des Basisteils der Meißelhalter-Anordnung aufweist, wobei die Wandabschnitte einteilig miteinander verbunden sind. Die Verschleißschutzkappe ist als Gussteil oder als Schmiedeteil ausgebildet, wobei ein Wandabschnitt eine Deckwand bildet, die in eine Verdickung übergeht, wobei an die Verdickung der Deckwand abgewandt eine Frontwand als weiterer Wandabschnitt angeschlossen ist, wobei die Frontwand und die Deckwand im Winkel zueinander stehen. Zwei zueinander beabstandet angeordnete Seitenwände sind als Wandabschnitte ausgebildet und sind über Übergangsabschnitte in die Deckwand übergeleitet. Im Übergangsbereich zwischen zumindest einer der Seitenwände und der Deckwand ist eine Verdickung angeordnet, die in die Verdickung im Übergangsbereich zwischen der Deckwand und der Frontwand übergeht.This object is achieved with a wear protection cap which has wall sections for covering surface areas of the base part of the bit holder arrangement, wherein the wall sections are integrally connected to one another. The wear protection cap is designed as a casting or as a forged part, wherein a wall portion forms a top wall, which merges into a thickening, facing away from the thickening of the top wall, a front wall is connected as a further wall portion, wherein the front wall and the top wall are at an angle. Two mutually spaced side walls are formed as wall sections and are transferred via transition sections in the top wall. In the transition region between at least one of the side walls and the top wall, a thickening is arranged, which merges into the thickening in the transition region between the top wall and the front wall.
Dadurch dass die Verschleißschutzkappe als Metall-Gussteil oder Metall-Schmiedeteil ausgebildet ist, können sowohl im Bereich der Wandabschnitte als auch im Bereich der die Wandabschnitte verbindenden Überleitbereiche uniforme Materialeigenschaften erzielt werden. Dementsprechend bieten sowohl die Wandabschnitte als auch die Übergangsbereiche zwischen den Wandabschnitten gleiche Material-Verschleißeigenschaften. Weiterhin lassen sich mit den Verschleißschutzkappen in Form von Metall-Gussteilen oder Metall-Schmiedeteilen vielfältige Gestaltungsvariationen erzielen, die mit den bekannten Stahlblechteilen so nicht verwirklichbar sind. Die Wandabschnitte sind verschleißoptimiert mit unterschiedlicher Wandstärke, insbesondere einem variierenden Wandstärkenverlauf, ausgebildet. Entsprechend werden Zonen größerer Wandstärke in Bereichen ausgeprägt, in denen ein starker Verschleiß entsteht. Zonen, die einer geringeren Abrassion ausgesetzt sind, können hingegen mit dünnerem Querschnitt materialoptimiert ausgeführt werden. Weiterhin können mit den erfindungsgsmäßen Ur- oder Umformteilen auch individuell auf den Anwendungsfall abgestimmte, strömungsoptimierte Geometrien erzeugen. Damit ist ein verschleißgünstiger Abfluss des abgetragenen Materials begünstigt.Because the wear protection cap is designed as a metal casting or metal forged part, uniform material properties can be achieved both in the region of the wall sections and in the region of the transition regions connecting the wall sections. Accordingly, both the wall portions and the transition areas between the wall portions provide equal material wear characteristics. Furthermore, with the wear protection caps in the form of metal castings or metal forgings various design variations can be achieve that are not feasible with the known sheet steel parts so. The wall sections are wear-optimized with different wall thickness, in particular a varying wall thickness curve formed. Accordingly, zones of greater wall thickness are pronounced in areas where heavy wear occurs. Zones that are exposed to less Abrassion, however, can be performed with a thinner cross-section material optimized. Furthermore, with the erfindungsgsmäßen original or formed parts also individually tailored to the application, flow-optimized Create geometries. This favors a low-wear drainage of the removed material.
Erfindungsgemäß sind weiterhin die Übergänge zwischen zwei Wandabschnitten mit einer größeren Wandstärke als wenigstens einer der Wandabschnitte ausgeführt, um hier einen besonderen Verschleißschutz zu bieten.According to the invention, the transitions between two wall sections are also designed with a larger wall thickness than at least one of the wall sections in order to provide a special wear protection here.
Die Verschleißschutzkappe ist, wie vorstehend erwähnt, als Gussteil oder als Metall-Schmiedeteil ausgebildet. Dementsprechend ist die Verschleißschutzkappe als Warmumformteil, insbesondere als Schmiedeteil, ausgebildet, da hier höhere Verschleißfestigkeiten erreicht werden können. Weiterhin lassen sich mit Schmiedeteilen vielfältigere Gestaltungsmöglichkeiten, beispielsweise variierende Querschnittsverläufe verwirklichen, wie dies vorstehend erwähnt wurde.The wear protection cap is, as mentioned above, formed as a casting or as a metal forging. Accordingly, the wear protection cap is designed as a hot-formed part, in particular as a forged part, since higher wear resistance can be achieved here. Furthermore, can be realized with forged parts more diverse design options, such as varying cross-sectional profiles, as mentioned above.
Für einen geringen Verschleiß ist ein möglichst kontinuierlicher Fluss des Abraummateriales vorteilhaft. Dementsprechend kann es gemäß einer Variante der Erfindung vorgesehen sein, dass zumindest ein Teil der Wandabschnitte über Rundungsübergänge ineinander übergeleitet ist.For a low wear a continuous flow of Abraummateriales is advantageous. Accordingly, it can be provided according to a variant of the invention that at least a part of the wall sections is connected via rounding transitions into each other.
Eine besonders bevorzugte Erfindungsvariante sieht vor, dass die Wandabschnitte derart angeordnet sind, dass diese geeignet sind, während des Bearbeitungseinsatzes eine Formschlussverbindung in Richtung der Kräfte, welche an der Verschleißschutzkappe angreifen mit der Meißelhalter-Anordnung zu bilden. Auf diese Weise wird eine quasi selbstfixierende Konstruktion der Verschleißschutzkappe erreicht. Die Verschleißschutzkappe kann dementsprechend mit einfach gestalteten Fixiermitteln an der Meißelhalter-Anordnung befestigt werden. Insbesondere können diese Fixiermittel in wenig verschleißgefährdeten Bereichen untergebracht sein. In diesem Zusammenhang und auch in Verbindung mit anderen in dieser Patentanmeldung beschriebenen Varianten von Verschleißschutzkappen können als Fixiermittel Schweißverbindungen, insbesondere Heftnähte oder Heftpunkte verwendet sein, die die Verschleißschutzkappe mit der Meißelhalter-Anordnung verbindet.A particularly preferred variant of the invention provides that the wall sections are arranged such that they are suitable for forming a form-locking connection in the direction of the forces acting on the wear protection cap with the bit holder arrangement during the machining operation. In this way, a quasi-self-fixing construction of the wear protection cap is achieved. The wear protection cap can accordingly be fastened to the bit holder arrangement with simply designed fixing means. In particular, these fixing agents can be accommodated in areas where there is little risk of wear. In this Relation and also in connection with other variants of wear protection caps described in this patent application can be used as a fixative welds, in particular stitching or stitching points that connects the wear protection cap with the bit holder assembly.
Die Verschleißschutzkappe ist zur Verwendung an einem Basisteil der Meißelhalter-Anordnung ausgebildet. Hier bietet sie einen effektiven Schutz des vergleichsweise teuersten Bauteils der Meißelhalter-Anordnung.The wear protection cap is adapted for use on a base portion of the bit holder assembly. Here it offers effective protection of the comparatively expensive component of the bit holder arrangement.
Die Verschleißschutzkappe weist am Basisteil einen Wandabschnitt in Form einer Deckwand auf, die über einen Übergangsabschnitt in eine Verdickung übergeht, wobei die Verdickung der Deckwand abgewandt in eine Frontwand als weiteren Wandabschnitt winklig übergeht. Diese Konstruktion schützt den besonders stark verschleißgefährdeten Frontbereich eines Basisteils. Die Verdickung im Übergangsbereich zwischen der Deckwand und dem Wandabschnitt bringt ein zusätzliches Verschleißvolumen zugunsten einer langen Standzeit. Besonders bevorzugt bildet die Verdickung einen Rundungsübergang um hier die Abrassionsvorgänge zu minimieren.The wear protection cap has on the base part a wall portion in the form of a top wall, which merges via a transition section in a thickening, the thickening of the top wall turns away turned away in a front wall as a further wall section at an angle. This construction protects the extremely wear-prone front area of a base part. The thickening in the transition region between the top wall and the wall section brings an additional wear volume in favor of a long service life. Particularly preferably, the thickening forms a rounding transition to minimize the Abrassionsvorgänge here.
Weiterhin ist es vorgesehen, dass zwei zueinander beabstandet angeordnete Seitenwände als Wandabschnitte ausgebildet sind und über Übergangsabschnitte in die Deckwand übergeleitet sind. Die Seitenwände schützen die Seitenbereiche des Basisteils und sind damit letztlich dem Transportbereich der Räum- und Ladewendel einer Fräswalze zugeordnet. Zusätzlich bilden die Seitenwände einen Formschluss zwischen der Verschleißschutzkappe und der Meißelhalter-Anordnung gegenüber Kräften die seitlich angreifen. Auch im Übergangsbereich zwischen den Seitenwänden und der Deckwand sind Verdickungen vorgesehen. Bedingt durch die Steigung der spiralförmigen Räum- und Ladewendeln entsteht eine dem Förderbereich zugewandte Druckseite an der ein besonders starker Verschleiß stattfindet. Besonders in diesem Bereich der Druckseite ist das Vorsehen einer Verdickung vorteilhaft.Furthermore, it is provided that two spaced-apart side walls are formed as wall sections and are transferred via transition sections in the top wall. The side walls protect the side areas of the base part and are thus ultimately associated with the transport area of the clearing and loading spiral of a milling drum. In addition, the side walls form a positive connection between the wear protection cap and the bit holder arrangement against forces acting laterally. Also in the transition region between the side walls and the top wall thickenings are provided. Due to the pitch of the spiral clearing and loading helices, a pressure side facing the delivery area is created, at which a particularly heavy wear takes place. Especially In this area of the pressure side, the provision of a thickening is advantageous.
Im Rahmen der Erfindung kann es weiterhin vorgesehen sein, dass die Deckwand mittels der in die Verdickungen überleitenden Übergangsbereiche muldenartig zurückversetzt ist. Damit wird ein Expansionsbereich für das vorbeigeleitete Abraummaterial zugunsten einer geringeren Abrassion gebildet. Weiterhin bieten die Verdickungen einen Schutzwall für die entgegengesetzt zur Bewegungsrichtung nachgelagerten Bereiche der Deckwand, sodass diese Bereiche verschleißoptimiert ausgebildet sind. Insbesondere kann dann in dem muldenartigen Bereich auch beispielsweise eine Schraubverbindung angeordnet sein, die einen Meißelhalter der Meißelhalter-Anordnung an dem Basisteil fixiert.In the context of the invention, it may further be provided that the top wall is recessed in a trough-like manner by means of the transition regions which lead into the thickenings. Thus, an expansion area for the bypassed waste material is formed in favor of less abrasion. Furthermore, the thickenings provide a protective barrier for the regions of the top wall which are in the opposite direction to the direction of movement, so that these regions are made wear-optimized. In particular, then, for example, a screw connection can be arranged in the trough-like region, which fixes a bit holder of the bit holder arrangement on the base part.
Wie oben erwähnt wurde, können die Basisteile aneinanderliegend auf der Oberfläche des Fräswalzenrohres fixiert sein um eine Räum- und Ladewendel zu bilden. Um die abstandslose Zuordnung der Basisteile zueinander aufrechterhalten zu können, wird bei einer erfindungsgemäßen Verschleißschutzkappe im Übergangsbereich zwischen der Frontwand und einer seitlich anschließenden Seitenwand eine Ausnehmung ausgebildet. Im Bereich der Ausnehmung können die Basisteile aneinandergesetzt sein.As mentioned above, the base parts may be fixed to each other on the surface of the milling drum tube to form a clearing and loading helix. In order to maintain the distance allocation of the base parts to each other, a recess is formed in a wear protection cap according to the invention in the transition region between the front wall and a laterally adjoining side wall. In the region of the recess, the base parts can be placed next to one another.
Die Erfindung wird im Folgenden, anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert.
Es zeigen:
-
Fig. 1 eine Meißelhalter-Anordnung mit Verschleißschutzkappen in perspektivischer Darstellung, -
Fig. 2 ein Basisteil der Meißelhalter-Anordnung gemäßFig. 1 mit einer Verschleißschutzkappe in perspektivischer Explosionsdarstellung, -
Fig. 3 und 4 die Verschleißschutzkappe gemäßFig. 2 in verschiedenen Ansichten, -
Fig. 5 einen Meißelhalter der Meißelhalter-Anordnung gemäßFig. 1 zusammen mit einer nicht erfindungsgemäßen Verschleißschutzkappe in perspektivischer Darstellung und -
Fig. 6a bis 6e die Verschleißschutzkappe gemäßFig. 5 in verschiedenen Ansichten.
Show it:
-
Fig. 1 a chisel holder arrangement with wear protection caps in perspective view, -
Fig. 2 a base part of the bit holder assembly according toFig. 1 with a wear protection cap in a perspective exploded view, -
3 and 4 the wear protection cap according toFig. 2 in different views, -
Fig. 5 a bit holder of the bit holder assembly according toFig. 1 together with a non-inventive wear protection cap in perspective and -
Fig. 6a to 6e the wear protection cap according toFig. 5 in different views.
Unter Bezugnahme auf
Mit dem Basisteil 10 kann die Verschleißschutzkappe 20 verbaut werden. Wie
Zur Montage der Verschleißschutzkappe 20 wird diese über das Basisteil 10 gesteckt. Dabei kommen die beiden Seitenwände 27 und 28 an den Außenseiten der Seitenteile 11 zum Liegen. Die Deckwand 21 liegt mit ihrer Rückseite auf der Frontfläche 15 auf. Die Frontwand 26 liegt rückseitig auf der Frontlfäche 16 auf. Im Bereich der Ausnehmung 20.1 steht das Basisteil 10 an dem Eckübergang zwischen der Frontfläche 16 und der Außenseite des Seitenteils 11 frei. In diesem Bereich ist ein weiteres Basisteil 10, welches in der Zeichnung nicht dargestellt ist, angereiht um die Räum- und Ladewendel auf dem Fräswalzenrohr zu bilden. Die beiden Ausnehmungen 22 stellen die Gewindeaufnahmen 14 frei. Zur Befestigung der Verschleißschutzkappe 20 an dem Basisteil 10 sind Schweißverbindungen verwendet. Beispielsweise können diese an verschleißgünstigen Stellen gelegen sein. Insbesondere können beispielsweise Heftnähte im Bereich der Seitenwände 27, 28 vorgesehen sein.For mounting the
In
Der Steckansatz 41 weist rückwärtig zwei zueinander im Winkel angestellte Lagerflächen 41.1 auf. Im Bereich der Frontseite ist der Steckansatz 41 mit zwei Druckflächen 42 ausgestattet. Die Druckflächen 42 verlaufen dabei im Winkel kleiner als 90° zur Mittellängsachse des Steckansatzes 41. Der Meißelhalter 40 kann mit dem vorbeschriebenen Basisteil 10 verbaut werden. Hierzu wird der Meißelhalter 40 mit seinem Steckansatz 41 in die Steckaufnahme 13 des Basisteils 10 eingesteckt. Im montierten Zustand stützt sich der Meißelhalter 40 mit seinen Lagerflächen 41.1 flächig an den Stützflächen 13.2 und mit seinen beiden Stützflächen 43 flächig an den Stützflächen 13.1 ab. Zur Fixierung des Meißelhalters 40 werden zwei Befestigungsschrauben 30 (siehe
Wie
Wenn während des Betriebseinsatzes die Verschleißschutzkappen 20 und 50 verschleißen, so können diese bedarfsweise ausgetauscht werden. Hierzu müssen lediglich die Verbindungsmittel, beispielsweise hier vorliegend, die Heftnähte aufgetrennt werden. Dies kann vor Ort mit einer entsprechenden Schneideinrichtung bewerkstelligt werden. Die verschlissenen Verschleißschutzkappen 20 und 50 können dann gegen neue Verschleißschutzkappen 20, 50 ausgetauscht werden. Diese werden dann wieder an dem Basisteil 10 und dem Meißelhalter 50 befestigt. Diese Reparaturmaßnahme lässt sich mit kurzer Reparaturdauer durchführen, sodass die Maschinenstillstandszeiten reduziert werden.If the wear caps 20 and 50 wear during operation, so they can be replaced if necessary. For this purpose, only the connecting means, for example, here, the stitching seams must be separated. This can be done on site with a corresponding cutting device. The worn wear caps 20 and 50 can then be replaced with new wear caps 20, 50. These are then fastened to the
Die Verschleißschutzkappe 20 weist im Rahmen der Erfindung als Wandabschnitte die Seitenwände 27, 28 die Frontwand 26 und die Deckwand 21 auf. Die Verschleißschutzkappe 50 weist als Wandabschnitte die Frontwand 54, die Deckwand 55 und die Seitenwände 57 auf. Die Wandabschnitte der Verschleißschutzkappe 20 sind einteilig miteinander verbunden, wobei die Verschleißschutzkappen als Metall-Gussteil oder Metall-Schmiedeteil ausgebildet sind.The
Claims (5)
- A wear protection cap (20) for a chisel holder arrangement, wherein the wear protection cap (20) is designed for use on a base part (10) of the chisel holder arrangement, comprising wall sections (21, 26, 27, 28) for covering surface regions of the base part, wherein the wall sections are integrally connected to one another and the wear protection cap (20) is formed as a cast part or as a forged part, wherein a wall section has a top wall (21) which merges into a thickened portion (24.1), wherein a front wall (26), facing away from the top wall (21), is connected as a further wall section to the thickened portion (24.1), wherein the front wall (26) and the top wall (21) are arranged at an angle to one another, wherein two side walls (27, 28) arranged at a distance from one another are designed as wall sections and are merged via transition sections into the top wall (21), and wherein a thickened portion (24.2) is arranged in the transition region between at least one of the side walls (27, 28) and the top wall (21), said thickened portion merging into the thickened portion (24.1) in the transition region between the top wall (21) and the front wall (26).
- The closure cap (20) according to claim 1, characterised in that at least one part of the wall sections is merged into another by means of rounded transitions (25, 29).
- The closure cap (20) according to claim 1 or 2, characterised in that the wall sections are arranged in such a way that same are suitable during machining use to form a form-fit connection with the base part in the direction of the forces acting on the wear protection cap.
- The closure cap (20) according to one of claims 1 to 3, characterised in that the top wall (21) is set back in a trough-like manner by means of the transition regions (23) merging into the thickened portions (24.1, 24.2).
- The closure cap (20) according to one of claims 1 to 4, characterised in that a recess (20.1) is formed in the transition region between the front wall (26) and a laterally adjoining side wall (28).
Applications Claiming Priority (1)
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DE102014112539.8A DE102014112539A1 (en) | 2014-09-01 | 2014-09-01 | Wear protective cap |
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EP3048242A1 EP3048242A1 (en) | 2016-07-27 |
EP3048242B1 true EP3048242B1 (en) | 2018-11-14 |
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EP15181472.0A Active EP3048242B1 (en) | 2014-09-01 | 2015-08-18 | Wear protection cap |
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US (1) | US9782889B2 (en) |
EP (1) | EP3048242B1 (en) |
CN (3) | CN204941539U (en) |
AU (2) | AU2015218539B2 (en) |
BR (1) | BR102015020817B1 (en) |
CA (1) | CA2901891C (en) |
DE (1) | DE102014112539A1 (en) |
RU (1) | RU2622941C2 (en) |
Families Citing this family (4)
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DE102014112539A1 (en) | 2014-09-01 | 2016-03-03 | Wirtgen Gmbh | Wear protective cap |
DE102017104651A1 (en) | 2017-03-06 | 2018-09-06 | POWER-TECHNOLOGIE GmbH | Milling roller and method for milling |
DE102017117455A1 (en) | 2017-08-02 | 2019-02-07 | POWER-TECHNOLOGIE GmbH | Milling roller and method for milling |
EP4198259A1 (en) * | 2021-12-17 | 2023-06-21 | Sandvik Mining and Construction G.m.b.H. | A wear protection cap and a bit holder arrangement |
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2014
- 2014-09-01 DE DE102014112539.8A patent/DE102014112539A1/en active Pending
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2015
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- 2015-08-26 CA CA2901891A patent/CA2901891C/en active Active
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- 2015-08-28 AU AU2015218539A patent/AU2015218539B2/en active Active
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- 2015-09-01 CN CN201510551840.1A patent/CN105386762B/en active Active
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AU2017201248B2 (en) | 2018-12-06 |
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CN110145304A (en) | 2019-08-20 |
CN110145304B (en) | 2020-10-20 |
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EP3048242A1 (en) | 2016-07-27 |
US9782889B2 (en) | 2017-10-10 |
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AU2015218539A1 (en) | 2016-03-17 |
BR102015020817A2 (en) | 2016-05-31 |
CA2901891C (en) | 2018-05-29 |
CA2901891A1 (en) | 2016-03-01 |
CN105386762B (en) | 2019-04-12 |
CN105386762A (en) | 2016-03-09 |
CN204941539U (en) | 2016-01-06 |
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AU2017201248A1 (en) | 2017-03-16 |
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