EP2405098B1 - Fräsmeißelanordnung mit Verschleißscheibe - Google Patents

Fräsmeißelanordnung mit Verschleißscheibe Download PDF

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Publication number
EP2405098B1
EP2405098B1 EP11004038.3A EP11004038A EP2405098B1 EP 2405098 B1 EP2405098 B1 EP 2405098B1 EP 11004038 A EP11004038 A EP 11004038A EP 2405098 B1 EP2405098 B1 EP 2405098B1
Authority
EP
European Patent Office
Prior art keywords
wear
cutting tool
cutter holder
holder
milling cutter
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
EP11004038.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2405098A2 (de
EP2405098A3 (de
Inventor
Steffen Wachsmann
Peter Erdmann
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.)
Bomag GmbH and Co OHG
Original Assignee
Bomag GmbH and Co OHG
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 Bomag GmbH and Co OHG filed Critical Bomag GmbH and Co OHG
Publication of EP2405098A2 publication Critical patent/EP2405098A2/de
Publication of EP2405098A3 publication Critical patent/EP2405098A3/de
Application granted granted Critical
Publication of EP2405098B1 publication Critical patent/EP2405098B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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

Definitions

  • the invention relates to a milling cutter arrangement with a wear washer according to the type specified in the preamble of claim 1.
  • the invention further relates to a wear washer for use in such a milling cutter arrangement, as well as a milling cutter with a preassembled wear washer.
  • Milling bit arrangements of the type in question are used on soil milling machines, such as road and trench milling machines, in particular cold milling machines, soil stabilizers / recyclers, as well as on mining drills and are used to remove a soil material from an asphalt layer or the like.
  • soil milling machines such as road and trench milling machines, in particular cold milling machines, soil stabilizers / recyclers, as well as on mining drills and are used to remove a soil material from an asphalt layer or the like.
  • so-called round shank chisels consist of a milling bit head and a round cutter bit shaft, which sits in a bit holder bore of a bit holder, whereby rotation of the cutter bit about its longitudinal axis is made possible during the milling operation.
  • a stop surface is provided on the bit holder for supporting the milling bit head.
  • the chisel holder is in turn attached to a milling drum, e.g. B. welded or screwed.
  • the milling chisel is subject to high wear and abrasion due to the soil material to be milled.
  • the abutment surface on the chisel holder is exposed to extraordinary wear due to the rotating milling chisel and the abrasive soil material (e.g. rock powder).
  • An object of the invention is to improve a milling cutter arrangement of the type in question with regard to ease of installation and maintenance.
  • a milling cutter arrangement comprises a chisel holder which can be fastened or fastened to a milling drum, a milling chisel which is fastened to the chisel holder and which is seated with its milling chisel shank (generally a round shank) in a chisel holder bore in the chisel holder (standard holder or interchangeable holder) and which sits around its longitudinal axis can rotate, and a wear washer, which is arranged non-rotatably between a stop surface of the bit holder and the milling bit head of the milling bit.
  • the anti-rotation device between the wear plate and the chisel holder is provided by at least one groove or indentation formed on the outer circumference or outer contour of the wear plate and a guide formed on the chisel holder and engaging in this groove. It is preferably provided that the wear disk has a plurality of grooves on the outer circumference, in each of which a corresponding guide on the bit holder engages.
  • a groove has an inward orientation (main direction).
  • a groove has essentially a radial orientation with respect to the longitudinal axis of the milling cutter or with respect to the central bore of the wear plate (for the passage of the milling cutter shaft).
  • the milling cutter arrangement according to the invention has many advantages.
  • a major advantage is that it is very easy to install and maintain, which is essentially due to the proposed system of the corresponding form-locking elements.
  • Another advantage is e.g. B. to see in the inexpensive manufacturability of the wear plate.
  • the wear plate has at least one external additional surface area with respect to a base area, in which at least one groove is formed.
  • the base surface is used for the abutment of the wear washer on the abutment surface of the bit holder and the support of the milling bit head on the opposite side.
  • the base surface has a central bore, which is provided for the passage of the cutting bit shank in order to be able to insert it into the bit holder bore.
  • the base surface is preferably approximately circular in shape in plan view.
  • the at least one external additional surface area of the wear plate is designed as partial or complete edge protection for the stop surface of the chisel holder.
  • the external additional surface area of the wear washer is angled or angled with respect to the base area.
  • the bending takes place in particular along a curved line.
  • the additional surface area has in particular a spatially curved surface.
  • the base surface of the wear plate is designed with a surface curvature (crowning).
  • This surface curvature serves on the one hand to enlarge the contact area between the wear plate and the abutment surface of the chisel holder, which leads to a lower surface pressure, and on the other hand also to simplify centering of the wear plate on the abutment surface.
  • the wear washer has a collar which engages in the bit holder bore of the bit holder.
  • This collar is preferably designed as a collar running around the central bore, which can engage in the bit holder bore of the bit holder, by means of which the wear disk can be centered relative to the bit holder.
  • the bit holder bore of the bit holder is preferably provided with a corresponding centering chamfer.
  • the wear washer is formed in one piece from a spring steel material.
  • the wear washer is prepared as a sheet metal part or stamped part, which is advantageous in terms of strength and manufacturing costs.
  • At least one guide formed on the chisel holder and engaging in a groove of the wear disc has a wear section which extends in particular in a longitudinal direction of the milling cutter. This is explained in more detail below in connection with the figures.
  • protection is also claimed separately for a milling cutter with a preassembled wear disc.
  • Such an assembly unit ensures that the wear plate is automatically replaced with every bit change.
  • the at least temporary fixation of the wear plate on the milling tool shank can be accomplished in particular by a one-piece or multi-part sleeve, by means of which the wear plate is held captively on the milling bit shaft.
  • Fig. 1a shows a milling cutter arrangement designated in total by 100.
  • the milling cutter arrangement 100 comprises a cutter holder 10 which is attached to a milling drum (or a rotor), not shown.
  • a milling cutter 20 is attached to the chisel holder 10, of which only the milling cutter head 21 with the milling cutter tip 22 is visible.
  • the milling cutter 20 sits with a round milling cutter shaft (see Fig. 6 ) in a bit holder bore of the bit holder 10 and can about its longitudinal axis L (see Fig. 4 ) rotate.
  • the milling cutter head 21 of the milling cutter 20 is supported here on an abutment surface of the cutter holder 10 (see also Fig. 4 ).
  • a non-rotatable wear washer 30 is arranged between the milling cutter head 21 and this stop surface.
  • the anti-rotation of the wear plate 30 is accomplished by a groove or notch 31 formed on the outer circumference of the wear plate 30 and a guide 11 formed on the bit holder 10 and positively engaging in this groove 31.
  • the guide 11 is designed as an elevation or hump (see e.g. Fig. 5 ) and has two opposite guide flanks 12, which are provided with chamfers 13 in the upper region to simplify assembly.
  • the bit holder 10 is formed in one piece.
  • Fig. 2a shows a perspective view of the top of the in the embodiment of the Fig. 1a used wear washer 30.
  • the wear washer 30 is formed in one piece from a sheet metal material.
  • the wear plate 30 has an approximately circular base 32 which encloses a central bore 33 for the passage of the milling cutter shank.
  • the base surface 32 can be cambered upwards or downwards (not shown).
  • An external additional surface area 34 is arranged on the base surface 32, in which the groove 31 is formed, the groove 31 extending radially into the base surface 32 (see also Fig. 2b ).
  • the additional surface area 34 is angled down along a curved or arcuate line 36 with respect to the base surface 32 (with respect to a preferred installation position) (see also Fig. 4a ). With 35 a circumferential chamfer on the upper edge of the central bore 33 is designated.
  • Fig. 2b shows a top view of the wear washer 30.
  • the preferred trapezoidal shape of the groove 31 can be seen.
  • the transitions 37 of the lateral groove flanks to the groove base 38 are formed with a radius.
  • the groove base 38 is designed as an arc, the arc having a smaller radius with respect to the outer contour of the base area 32.
  • With 39 the orientation (main direction) of the groove 31 in the radial direction to the center of the bore 33 is indicated.
  • Fig. 2c shows a perspective view of the underside of the wear washer 30.
  • a collar 41 which runs around the bottom of the central bore 33 and points downward can be seen very clearly and can engage in the bit holder bore of the bit holder 10, which is particularly important during assembly Centering of the wear plate 30 relative to the bit holder 10 can be brought about.
  • the bit holder bore in the bit holder 10 is preferably formed with a centering chamfer corresponding to the collar 41.
  • the additional surface area 34 on the wear plate 30 also serves as partial edge protection for the edge surrounding the stop surface on the chisel holder 10. This follows very clearly from the Fig. 1a .
  • Fig. 3c shows a perspective view of the underside of an embodiment of a wear washer 30C, in which the additional surface area 34 is designed as a collar-shaped surface section which completely surrounds the base surface 32 and is only interrupted by the groove 31.
  • the wear disk 30 has approximately a plate shape. A complete edge protection for the peripheral edge on the stop surface of the bit holder can be achieved by the collar-shaped additional surface area 34.
  • Fig. 3a shows, also in a perspective view of the underside, a further embodiment of a wear plate 30A, which is essentially mirror-symmetrical to the embodiment of FIG Fig. 2 is formed and has the two opposite additional surface areas 34a and 34b, each with a groove 31a and 31b formed therein.
  • Fig. 1b shows the milling cutter arrangement 100A associated with this wear plate 30A.
  • the bit holder 10A has two guides 11a and 11b with guide flanks 12a and 12b arranged thereon.
  • the guide 11b is also provided with chamfers 13b in the upper region.
  • the wear disk 30A could also be in the milling cutter arrangement 100 in FIG Fig. 1a deploy.
  • Fig. 3b shows a further embodiment of a wear washer 30B, likewise in a perspective view of the underside, in which the additional surface area 34 is designed to be relatively small and compact.
  • Fig. 4 shows the one associated with this wear plate 30B Milling cutter arrangement 100B, wherein the wear disk 30B is in principle also in the milling cutter arrangements 100 and 100A 1a and 1b could be used.
  • Fig. 4a shows a further embodiment of a milling cutter arrangement according to the invention, designated 100B, into which a wear washer 30B according to FIG Fig. 3b is inserted.
  • the guide 11B on the chisel holder 10B is arranged virtually below the milling cutter head 21 with respect to the milling cutter 20 inclined with its longitudinal axis L.
  • a guide 11B could also be arranged laterally on the bit holder 10B with respect to the milling bit head, which applies to all exemplary embodiments.
  • the guide formed on the cutter holder and engaging in the groove of the wear disk is designed with a defined wear section. This is explained below using the Fig. 4 explained in more detail.
  • the bit holder 10B has an approximately cylindrical section 16, at the upper end of which the stop surface 15 is formed.
  • the permissible wear path (target wear path) is indicated with S.
  • Such a wear section 16 is also provided in the other exemplary embodiments.
  • the wear section 16 enables z. B. also conventional wear discs rotating with the milling cutter 20 can be used, but this then leads to wear or abrasion (as explained at the outset) of the wear section 16.
  • the form fit between the groove of a non-rotatable wear washer (according to the preceding explanations) and the guide 11B can be ensured if such a non-rotatable wear washer is to be used.
  • Fig. 4b shows the milling cutter arrangement 100B with "worn out” wear section 16, wherein the milling cutter arrangement 100B can still be operated with the non-rotatable wear disc 30B shown, for which purpose the guide 11B is designed accordingly by the guide flanks 12 projecting below the stop surface 15 with respect to the longitudinal axis L.
  • the guide 11B is also affected by the wear, as in FIG Fig. 4b shown.
  • the groove 31 of the wear plate 30B (the same also applies to the other exemplary embodiments) is designed such that a collision with the worn upper edge of the guide 11B is excluded. This is also accomplished in part by angling the additional surface area 34.
  • Fig. 4b shows the milling cutter arrangement 100B with "worn out” wear section 16, wherein the milling cutter arrangement 100B can still be operated with the non-rotatable wear disc 30B shown, for which purpose the guide 11B is designed accordingly by the guide flanks 12 projecting below the stop surface 15 with respect to the longitudinal axis L.
  • the guide 11B is also affected
  • Fig. 5 shows a milling cutter arrangement 100C according to the invention in which the tool holder is designed as a two-part tool changer holder 10a / 10b.
  • the stop surface 15, the guide 11 and the wear section 16 are arranged on the exchangeable upper part 10b.
  • the upper part 10b is formed in one piece.
  • Fig. 6 shows a finished and in particular ready-to-sell and / or ready-to-sell assembly unit of a milling cutter 20 with a wear plate 30 attached to it, in a perspective view.
  • the milling cutter head is designated 21 and the milling cutter shaft designed as a round shank is designated 23.
  • the milling cutter head 21 generally has a milling cutter tip 22 formed from a hard metal.
  • the wear disk 30 is preassembled on the milling cutter shank 23 and held captively by means of a sleeve 40. As a result, the loss of the wear disk 30 during assembly or when replacing the milling cutter 20 is also excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Milling Processes (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
EP11004038.3A 2010-07-05 2011-05-16 Fräsmeißelanordnung mit Verschleißscheibe Active EP2405098B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010026106A DE102010026106A1 (de) 2010-07-05 2010-07-05 Fräsmeißelordnung mit Verschleißscheibe

Publications (3)

Publication Number Publication Date
EP2405098A2 EP2405098A2 (de) 2012-01-11
EP2405098A3 EP2405098A3 (de) 2018-01-03
EP2405098B1 true EP2405098B1 (de) 2020-04-29

Family

ID=44838306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11004038.3A Active EP2405098B1 (de) 2010-07-05 2011-05-16 Fräsmeißelanordnung mit Verschleißscheibe

Country Status (4)

Country Link
US (1) US8770669B2 (zh)
EP (1) EP2405098B1 (zh)
CN (1) CN102310488B (zh)
DE (1) DE102010026106A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8465475B2 (en) 2008-08-18 2013-06-18 Intuitive Surgical Operations, Inc. Instrument with multiple articulation locks
USD772315S1 (en) 2013-04-11 2016-11-22 Betek Gmbh & Co. Kg Chisel
DE102013008618B4 (de) * 2013-05-21 2020-08-27 Bomag Gmbh Werkzeugverbund für eine Fräswalze, Fräswerkzeughalter und Fräswalze
DE102014112539A1 (de) * 2014-09-01 2016-03-03 Wirtgen Gmbh Verschleißschutzkappe
AU2016303652B2 (en) * 2015-07-31 2021-04-29 Joy Global Underground Mining Llc Cutting bit assembly
US10246999B2 (en) * 2016-03-23 2019-04-02 Caterpillar Paving Products Inc. Locking system to prevent rotation of toolholder
US10233751B2 (en) 2017-04-18 2019-03-19 Caterpillar Paving Products Inc. Tool adapter for a rotary tool

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201421A (en) * 1978-09-20 1980-05-06 Besten Leroy E Den Mining machine bit and mounting thereof
DE3233123C2 (de) * 1982-09-07 1985-09-19 Wolfgang 6603 Sulzbach Preinfalk Axialhalterung für Rundschaftmeißel
US4632463A (en) * 1984-08-03 1986-12-30 The Cincinnati Mine Machinery Company Combined base member and bit holder with protected retainer
US5067775A (en) * 1988-04-21 1991-11-26 Kennametal Inc. Retainer for rotatable bits
DE4306206A1 (de) 1993-03-01 1994-09-08 Wirtgen Gmbh Fräsmeißelanordnung für Straßenfräsmaschinen
DE19856916C1 (de) * 1998-12-10 2000-08-31 Betek Bergbau & Hartmetall Befestigung für einen Rundschaftmeißel
DE19922206C2 (de) * 1999-05-14 2002-02-28 Betek Bergbau & Hartmetall Werkzeug für eine Schräm-, Bergbau- oder Straßenfräsmaschine
US7204560B2 (en) * 2003-08-15 2007-04-17 Sandvik Intellectual Property Ab Rotary cutting bit with material-deflecting ledge
US6962395B2 (en) * 2004-02-06 2005-11-08 Kennametal Inc. Non-rotatable protective member, cutting tool using the protective member, and cutting tool assembly using the protective member
US7229136B2 (en) * 2004-09-28 2007-06-12 The Sollami Company Non-rotatable wear ring and retainer sleeve for a rotatable tool

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP2405098A2 (de) 2012-01-11
CN102310488B (zh) 2015-02-04
DE102010026106A1 (de) 2012-01-05
EP2405098A3 (de) 2018-01-03
US20120068526A1 (en) 2012-03-22
CN102310488A (zh) 2012-01-11
US8770669B2 (en) 2014-07-08

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