EP2318656B1 - Meisselhalter mit schweissung als verschleissschutzelement - Google Patents

Meisselhalter mit schweissung als verschleissschutzelement Download PDF

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Publication number
EP2318656B1
EP2318656B1 EP09777093.7A EP09777093A EP2318656B1 EP 2318656 B1 EP2318656 B1 EP 2318656B1 EP 09777093 A EP09777093 A EP 09777093A EP 2318656 B1 EP2318656 B1 EP 2318656B1
Authority
EP
European Patent Office
Prior art keywords
chisel
weld
support surface
groove
receptacle
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
EP09777093.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2318656A1 (de
Inventor
Thomas Lehnert
Christian Berning
Martin Lenz
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 EP2318656A1 publication Critical patent/EP2318656A1/de
Application granted granted Critical
Publication of EP2318656B1 publication Critical patent/EP2318656B1/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
    • 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
    • E21C35/1831—Fixing methods or devices
    • 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
    • E21C35/1835—Chemical composition or specific material

Definitions

  • the invention relates to chisel holders for a cutting machine, road milling machine, surface miner or the like with a chisel holder that has an insertion opening and with a chisel support surface, at least one wear protection element being arranged in an area assigned to the chisel support surface.
  • Such a chisel holder is from the US 6,585,327 B2 known.
  • the bit holder has a bore as a bit holder.
  • the chisel can be used interchangeably.
  • a hole extension is provided, into which hard metal rings are soldered.
  • the chisel holder is aligned with the holes penetrating the hard metal rings.
  • the chisel inserted in the chisel holder is supported with its chisel head on a chisel support surface of the facing hard metal ring.
  • both hard metal rings also support the chisel in the area of its chisel shank and thus act as wear protection during operation.
  • the use of hard metal material for the above-described purpose considerably increases the cost of production.
  • DE 39 29 609 A1 further discloses a bit holder with a bit holder designed as a bore.
  • a shaft chisel can be received with its shaft in the chisel holder.
  • the chisel holder is provided with hard metal reinforcement.
  • DE 26 45 877 A1 discloses a chisel holder with a base body into which a chisel holder is inserted.
  • the bit holder runs out in a cover surface of the bit holder.
  • a weld seam is applied to the edge area of this cover surface for the purpose of protecting against wear.
  • the at least one wear protection element is designed as a weld and is arranged at least in regions in at least one recess and that the recess is recessed into the bit support surface, or in that one or more grooves are designed as radial grooves and are set back with respect to the bit support surface.
  • the weld is formed by a filler metal that can be made in the recess with a low manufacturing effort using a conventional welding process.
  • the weld is characterized by a high resistance to abrasion and thus sets the chisel or wear protection disc a high wear resistance.
  • the wear properties of the tool holder can be adjusted to a large extent by choosing the appropriate welding filler material. In this way, wear-optimized chisel holders can be provided for different road surfaces to be processed (concrete, asphalt) or raw materials (coal, sandstone, salt, etc.). Because the weld is accommodated in a recess provided for this purpose, surfaces that are required for error-free tool function and a long service life remain unaffected by the wear element.
  • the recess is designed as a groove.
  • the groove can be made in the bit holder in a simple manner, for example by mechanical processing. Depending on the desired wear properties, almost any groove geometry can be manufactured.
  • the wear can be controlled by choosing a groove cross section suitable for the application.
  • the chisel support surface runs in a ring around the insertion opening and is arranged orthogonally to the central longitudinal axis of the chisel holder, and that the recess is recessed into the chisel support surface.
  • the chisel support surface which, as a geometric element of the chisel holder, guarantees the exact support of the chisel, is not functionally affected by the groove.
  • the dimension of the recess in the groove can be selected in a material-optimized manner so that the wear limit for the bit holder is reached when the entire weld is processed. If it is provided that the weld is flush with the chisel support surface, then the weld does not influence the exact chisel support and is, however, immediately available for starting operation. According to the invention, it can also be provided that the weld is at least partially set back in relation to the bit support surface in the direction of the central longitudinal axis of the bit holder.
  • the recess runs around the insertion opening.
  • a possible embodiment of the invention can be such that the groove has a bottom wall and two groove walls adjoining it laterally at an angle, and that the groove side walls are parallel to one another. Then a constant wear resistance is opposed over the entire effective period of the weld.
  • the groove has a bottom wall and two groove side walls adjoining it laterally at an angle, and that at least one of the angles is greater than 90 °, so that a V-shaped groove geometry results, or that the groove in the Cross-section is U-shaped. It can be taken into account that the bit holder is worn as the wear increases. This results in changed force relationships on the bit holder, which can be taken into account with the groove geometries.
  • the expanding groove geometry has manufacturing advantages with regard to the reliable introduction of the weld.
  • the Figures 1 and 2nd show a bit holder changing system with a base part 10, a bit holder 20 and a bit 30.
  • the base part 10 has a shaft receptacle 15 which, starting from a shoulder 12 or a base surface 14, is incorporated as a breakthrough in the base part 10.
  • a stop surface 13 adjoins the shoulder 12 at an angle.
  • the base part 10 can be placed on the outer circumference of a milling drum tube (not shown) of a road milling machine.
  • the base part 10 is welded to the milling drum tube.
  • the pressure screw 17 is used to fasten the chisel holder 20.
  • the chisel holder 20 has an apron 21 which is coupled in one piece to a connecting section 23.
  • the connecting section 23 carries a shoulder 22 which has a cylindrical section 24 projecting beyond the apron 23.
  • the neck 22 and the cylindrical portion 24 are penetrated by a chisel receptacle 29 in the form of a through hole.
  • the cylindrical section 24 forms a chisel support surface 26 which rotates in a ring shape and concentrically around the central longitudinal axis of the chisel holder 29.
  • the chisel receptacle 29 merges into the chisel support surface 26 via an insertion chamfer 29.2 and a centering chamfer 29.1.
  • the centering chamfer 29.1 expands the chisel holder 29 in a V-shape.
  • the cylindrical extension 24 bears two wear marks 25. These are pierced as annular circumferential grooves in the outer contour of the cylindrical section 24 and are held parallel and spaced apart from the chisel support surface 26.
  • a cutout 41 which is essentially square or rectangular in cross section is machined into the chisel support surface 26.
  • This recess 41 can be produced by mechanical processing (drilling, turning, milling) as an annular and concentric groove around the central longitudinal axis of the bit holder 29.
  • This groove forms a bottom surface 44 which is parallel to the chisel support surface 26.
  • Groove side walls 43.1 and 43.2 adjoin the bottom surface 44 at a right angle. The groove side walls 43.1 and 43.2 are set such that they are kept at a distance from the chisel receptacle 29 (and the insertion chamfer 29.2 and the centering chamfer 29.1) and the wear marks 25.
  • a weld 40 is made in the recess 41. This completely fills the recess 41, an open surface 42 of the weld 40 being formed opposite the bottom surface 44 and being flush with the chisel support surface 26.
  • the recess 41 and its arrangement are selected such that the areas which are particularly important for a proper initial function of the overall system comprising the chisel 30 and the chisel holder 20, such as the chisel holder 29, the insertion chamfer 29.2, the centering chamfer 29.1 and the chisel support surface 26, are not formed from the weld are or are influenced by this functionally.
  • parts of the bit holder 20 can then be machined due to wear and the weld 40 can thereby be exposed in some areas. However, this then takes place in such a way that the weld 40 is ground in such a way that it can take over the task of the aforementioned functional surfaces without the tool being impaired.
  • the bore outlet of the chisel receptacle 29 opposite the weld 40 opens into a counter surface 27.
  • a plug-in extension 28.2 is formed on the chisel holder 20. With this plug-in attachment 28.2, the chisel holder 20 can be inserted into the plug-in receptacle 15 of the base part 10. The insertion movement is limited by the stop surface 13 against which the counter surface 27 strikes.
  • the pressure screw 17 is screwed into the thread receptacle 16 until it is braced on a pressure surface 28.1 of the plug-in attachment 28.2.
  • a subsequent space 11 is formed between an underside 28 of the chisel holder 20 and the shoulder 12 of the base part 10.
  • a chisel 30, in the present case a round shank chisel, can be installed in the chisel receptacle 29.
  • the round shank chisel has a chisel head 31 and a chisel shank 36 formed thereon.
  • a longitudinally slotted clamping sleeve 37 is axially captive, but can be rotated radially freely.
  • the chisel head 31 is provided with a cup-shaped receptacle in which a chisel tip 32 made of hard material is fastened.
  • a circumferential pull-out groove 33 is incorporated into the rotationally symmetrical chisel head 31 and is delimited by a collar 34 on the shaft side.
  • the chisel shank 36 In the transition area to the chisel head 31, the chisel shank 36 carries a wear disk 35 which is rotationally symmetrical and is provided on its side facing away from the chisel head 31 with a conically tapering centering collar 35.1.
  • the outer diameter and the inner diameter of the wear plate 35 and the cylindrical section 24 correspond approximately.
  • the centering collar 35.1 of the wear plate 35 and the centering chamfer 29.1 of the chisel receptacle 29 correspond to one another in order to function properly, for. B. to ensure unimpeded chisel rotation of the entire system in use.
  • the chisel 30 is inserted into the chisel receptacle 29 in such a way that it is held therein by means of the clamping action of the clamping sleeve 37.
  • the wear disc 35 rests on the chisel support surface 26 and the free surface 42 of the weld 40.
  • the chisel head 31 is supported on the opposite side of the wear disk 35.
  • the wear disc 35 grinds over the free surface 42 and the chisel support surface 26 and processes them. It should be noted that only minimal signs of wear occur per life cycle of a chisel 30.
  • the weld 40 in particular counteracts rapid wear.
  • the choice of the welding filler material allows the reaction to the special wear conditions of each individual application.
  • the cylindrical section 24 is nevertheless worked off, the state of wear being able to be determined optically by the position of the chisel support surface 26 in relation to the wear marking 25. After reaching the second wear mark 25, the bit holder 20 is to be replaced.
  • the Figure 9 shows that the weld 40 runs concentrically around the central longitudinal axis of the bit holder 29.
  • the weld 40 can be seen more clearly on an enlarged scale.
  • the recess 41 is recessed into the chisel holder 20 to such an extent that the bottom wall 44 extends approximately to the height of the lower wear marking 25. Wear protection is thus ensured almost over the entire life of the bit holder 20.
  • FIGS 5 to 13 show chisel holders 20 corresponding to the chisel holders 20 Figures 1 to 4 correspond. They differ only in the design of the recess 41 or the weld 40.
  • the groove side walls 43.1, 43.2 of the recess 41 are arranged in a V-shape with respect to one another, the groove side wall 43.2 being axially parallel to the central longitudinal axis of the chisel receptacle 29.
  • a symmetrical V-shaped groove design is shown, with the opening angle (adjustment a groove side wall 43.1, 43.2 to the bottom wall) is preferably selected to be greater than 90 °.
  • annular welds 40 are used which are concentric about the central longitudinal axis.
  • the welds 40 are essentially analogous to the weld 40 according to FIG Figure 4 educated.
  • Figure 8 illustrates an annular circumferential groove as a recess 41 which is semicircular or partially circular in cross section. This recess 41 is particularly easy to fill with the weld 40.
  • Figure 10 shows a weld 40, which is again in the form of a circumferential ring.
  • the ring width running in the radial direction is varied in order to form a wear protection element which is matched to different load intensities.
  • FIGS. 11 and 12th show the use of recesses 41 in the form of radial grooves. These are cut radially into the cylindrical outer surface of the cylindrical section 24.
  • Wear markings 25 occur in the transition area between the free surface 42 of the weld 40 and the cylindrical section 24. If the free surface 42 is analogous Figure 9 is designed, the wear marks 25 are clearly visible as transitions of the troughed area.
  • FIG 12 An exemplary embodiment is shown in which two recesses 41 arranged one above the other are used with welds 40 made therein. As the illustration illustrates, the welds 40 here can form outwardly protruding free surfaces 42 for identifying wear marks 25.
  • FIGS Figure 13 An embodiment is shown which is not part of the invention and which illustrates that the recess 41 can be formed not only in the form of a groove, but also as a recess.
  • circumferential welds 40 punctiform, arc-shaped or linear recesses 41 with welds 40 can also be provided, as exemplified in FIGS Figures 14 and 15 are shown.
  • the only limitation for the shape and arrangement of the recess (es) is that they must be manufactured and filled again with the weld.
  • the described invention can be used and implemented simply not only in the chisel holders 20 shown in the drawings, but also in any other way in the chisel holders 20.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Road Repair (AREA)
EP09777093.7A 2008-09-05 2009-07-10 Meisselhalter mit schweissung als verschleissschutzelement Active EP2318656B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008045825A DE102008045825B3 (de) 2008-09-05 2008-09-05 Meißelhalter für eine Schrämmaschine, Straßenfräse, Suface-Miner oder dergleichen
PCT/EP2009/005009 WO2010025788A1 (de) 2008-09-05 2009-07-10 Meisselhalter mit schweissung als verschleissschutzelement

Publications (2)

Publication Number Publication Date
EP2318656A1 EP2318656A1 (de) 2011-05-11
EP2318656B1 true EP2318656B1 (de) 2020-04-15

Family

ID=41110387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777093.7A Active EP2318656B1 (de) 2008-09-05 2009-07-10 Meisselhalter mit schweissung als verschleissschutzelement

Country Status (7)

Country Link
US (1) US8783785B2 (zh)
EP (1) EP2318656B1 (zh)
CN (2) CN201581895U (zh)
AU (1) AU2009289875C1 (zh)
DE (1) DE102008045825B3 (zh)
TW (1) TWI405898B (zh)
WO (1) WO2010025788A1 (zh)

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GB201202533D0 (en) * 2012-02-14 2012-03-28 Element Six Gmbh Pick tool and method of using same
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CN103216225B (zh) * 2013-04-02 2015-06-10 三一重型装备有限公司 掘进机截割头及掘进机
USD772315S1 (en) * 2013-04-11 2016-11-22 Betek Gmbh & Co. Kg Chisel
DE102013110676A1 (de) * 2013-09-26 2015-03-26 Betek Gmbh & Co. Kg Meißel
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AU2015227270A1 (en) * 2014-03-07 2016-10-27 Vermeer Manufacturing Company Replaceable mounting apparatus for reducing elements
DE102014112539A1 (de) 2014-09-01 2016-03-03 Wirtgen Gmbh Verschleißschutzkappe
WO2016061105A1 (en) * 2014-10-17 2016-04-21 Vermeer Manufacturing Company Protective wear sleeve for cutting element
USD742948S1 (en) * 2014-12-11 2015-11-10 Kennametal Inc. Cutting bit
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CN105201501A (zh) * 2015-09-15 2015-12-30 安徽澳德矿山机械设备科技股份有限公司 掘进机截齿用镶套型耐磨齿座
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DE102016108808A1 (de) * 2016-05-12 2017-11-16 Betek Gmbh & Co. Kg Meißel mit einem Stützelement mit einem Zentrieransatz
DE102016122693A1 (de) * 2016-11-24 2018-05-24 POWER-TECHNOLOGIE GmbH Hartmetalleinsatz für einen Rundschaftmeißel
USD868122S1 (en) 2017-02-22 2019-11-26 Kennametal Inc. Cutting bit
CN106978776A (zh) * 2017-04-13 2017-07-25 苏州凯通工程机械有限公司 一种用于道路铣刨机的带柄刀具
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DE102018109148A1 (de) * 2018-04-17 2019-10-17 Betek Gmbh & Co. Kg Fräsmeißel
DE102018109147A1 (de) 2018-04-17 2019-10-17 Betek Gmbh & Co. Kg Fräsmeißel
US11103939B2 (en) * 2018-07-18 2021-08-31 The Sollami Company Rotatable bit cartridge
AU201816544S (en) 2018-08-01 2018-11-27 Betek Gmbh & Co Kg A chisel
CN109025992B (zh) * 2018-09-25 2024-01-05 温州宝通机械制造有限公司 一种用于挖沟机及采煤机刀座的刀座保护套
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CN110396907A (zh) * 2019-07-30 2019-11-01 苏州五元素机械制造有限公司 一种刀架
USD909165S1 (en) * 2019-08-27 2021-02-02 Kennametal Inc Adapter block
CN110965444A (zh) * 2020-01-13 2020-04-07 济南大学 一种角度可调的模块化铣刨装置及方法
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Also Published As

Publication number Publication date
CN101666229A (zh) 2010-03-10
US20110204702A1 (en) 2011-08-25
AU2009289875C1 (en) 2013-10-03
TW201014963A (en) 2010-04-16
EP2318656A1 (de) 2011-05-11
WO2010025788A1 (de) 2010-03-11
DE102008045825B3 (de) 2010-05-27
TWI405898B (zh) 2013-08-21
US8783785B2 (en) 2014-07-22
CN101666229B (zh) 2015-10-14
AU2009289875B2 (en) 2013-05-09
AU2009289875A1 (en) 2010-03-11
CN201581895U (zh) 2010-09-15

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