EP3048242B1 - Coiffe de protection - Google Patents

Coiffe de protection Download PDF

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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.)
Active
Application number
EP15181472.0A
Other languages
German (de)
English (en)
Other versions
EP3048242A1 (fr
Inventor
Paul Anthony Lemmey
Brett George Roney
Jamie Sinclair Moorby
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.)
Wirtgen GmbH
Original Assignee
Wirtgen 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 Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP3048242A1 publication Critical patent/EP3048242A1/fr
Application granted granted Critical
Publication of EP3048242B1 publication Critical patent/EP3048242B1/fr
Active 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
    • 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
    • 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.

Landscapes

  • 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)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Knives (AREA)

Claims (5)

  1. Coiffe de protection (20) pour un système de support de burin, la coiffe de protection (20) étant conçue pour être utilisée sur une pièce de base (10) du système de support de burin, comprenant des parties de paroi (21, 26, 27, 28) destinées à recouvrir des zones de surface de la pièce de base, les parties de paroi étant reliées ensemble d'un seul tenant et la coiffe de protection (20) étant conçue sous la forme d'une pièce moulée ou d'une pièce matricée, une partie de paroi formant une paroi de recouvrement (21) qui se prolonge en formant une protubérance (24.1), une paroi frontale (26) opposée à la paroi de recouvrement (21) étant dans le prolongement de la protubérance (24.1) sous la forme d'une autre partie de paroi, la paroi frontale (26) et la paroi de recouvrement (21) formant un angle l'une avec l'autre, deux parois latérales (27, 28) espacées l'une de l'autre étant conçues sous la forme de parties de paroi et se prolongeant par des parties de passage en paroi de recouvrement (21), et dans la zone de passage entre au moins l'une des parois latérales (27, 28) et la paroi de recouvrement (21) étant disposée une protubérance (24.2) qui se prolonge dans la protubérance (24.1) en zone de passage entre la paroi de recouvrement (21) et la paroi frontale (26).
  2. Coiffe de protection (20) selon la revendication 1, caractérisée en ce qu' au moins certaines parties de paroi se prolongent les unes dans les autres par des passages arrondis (25, 29).
  3. Coiffe de protection (20) selon la revendication 1 ou 2, caractérisée en ce que les partie de paroi sont disposées de telle sorte que ces dernières soient appropriées pendant l'usinage à former une liaison par complémentarité de forme avec la pièce de base dans la direction des forces lesquelles s'engagent sur la coiffe de protection.
  4. Coiffe de protection (20) selon une des revendications 1 à 3, caractérisée en ce que la paroi de recouvrement (21) est en retrait en creux au moyen des zones de passage (23) se prolongeant en protubérances (24.1, 24.2).
  5. Coiffe de protection (20) selon une des revendications 1 à 4, caractérisée en ce qu' un évidement (20.1) se présente dans la zone de passage entre la paroi frontale (26) et une paroi latérale adjacente (28).
EP15181472.0A 2014-09-01 2015-08-18 Coiffe de protection Active EP3048242B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014112539.8A DE102014112539A1 (de) 2014-09-01 2014-09-01 Verschleißschutzkappe

Publications (2)

Publication Number Publication Date
EP3048242A1 EP3048242A1 (fr) 2016-07-27
EP3048242B1 true EP3048242B1 (fr) 2018-11-14

Family

ID=54065681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15181472.0A Active EP3048242B1 (fr) 2014-09-01 2015-08-18 Coiffe de protection

Country Status (8)

Country Link
US (1) US9782889B2 (fr)
EP (1) EP3048242B1 (fr)
CN (3) CN110145304B (fr)
AU (2) AU2015218539B2 (fr)
BR (1) BR102015020817B1 (fr)
CA (1) CA2901891C (fr)
DE (1) DE102014112539A1 (fr)
RU (1) RU2622941C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014112539A1 (de) 2014-09-01 2016-03-03 Wirtgen Gmbh Verschleißschutzkappe
DE102017104651A1 (de) 2017-03-06 2018-09-06 POWER-TECHNOLOGIE GmbH Fräswalze und Verfahren zum Fräsen
DE102017117455A1 (de) 2017-08-02 2019-02-07 POWER-TECHNOLOGIE GmbH Fräswalze und Verfahren zum Fräsen
EP4198259A1 (fr) * 2021-12-17 2023-06-21 Sandvik Mining and Construction G.m.b.H. Capuchon de protection contre l'usure et agencement de support de trépan

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Also Published As

Publication number Publication date
CN204941539U (zh) 2016-01-06
AU2015218539A1 (en) 2016-03-17
CN110145304B (zh) 2020-10-20
CA2901891A1 (fr) 2016-03-01
AU2017201248A1 (en) 2017-03-16
CA2901891C (fr) 2018-05-29
AU2017201248B2 (en) 2018-12-06
EP3048242A1 (fr) 2016-07-27
US20160059405A1 (en) 2016-03-03
CN105386762B (zh) 2019-04-12
RU2015137067A (ru) 2017-03-10
CN110145304A (zh) 2019-08-20
BR102015020817A2 (pt) 2016-05-31
CN105386762A (zh) 2016-03-09
DE102014112539A1 (de) 2016-03-03
BR102015020817B1 (pt) 2022-03-22
AU2015218539B2 (en) 2017-03-16
US9782889B2 (en) 2017-10-10
RU2622941C2 (ru) 2017-06-21

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