EP2218829B1 - Fräszahn für eine Schlitzwandfräse - Google Patents

Fräszahn für eine Schlitzwandfräse Download PDF

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Publication number
EP2218829B1
EP2218829B1 EP10001172.5A EP10001172A EP2218829B1 EP 2218829 B1 EP2218829 B1 EP 2218829B1 EP 10001172 A EP10001172 A EP 10001172A EP 2218829 B1 EP2218829 B1 EP 2218829B1
Authority
EP
European Patent Office
Prior art keywords
cutting
tooth
cutters
symmetry
plane
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
EP10001172.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2218829A3 (de
EP2218829A2 (de
Inventor
Wilhelm Ruby
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.)
Bauer Maschinen GmbH
Original Assignee
Bauer Maschinen 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 Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Publication of EP2218829A2 publication Critical patent/EP2218829A2/de
Publication of EP2218829A3 publication Critical patent/EP2218829A3/de
Application granted granted Critical
Publication of EP2218829B1 publication Critical patent/EP2218829B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2858—Teeth characterised by shape
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements

Definitions

  • the invention relates to a cutting tooth according to the preamble of claim 1.
  • a cutting tooth is formed with a tongue-shaped tooth root for receiving in a cutting wheel, wherein the tongue-shaped tooth root has a peripheral circumferential retaining groove, and at least one cutting edge, which is arranged on the tooth base on the head side.
  • a generic cutting tooth goes out of the EP 1 780 375 A1 out.
  • the cutting tooth is formed symmetrically to a longitudinal plane, which runs parallel to and between the U-shaped side surfaces and in the milling direction.
  • Other cutting teeth are for example from the EP 1 780 375 A1 and the EP 0 916 771 A2 known.
  • the known milling teeth are inserted with their tooth feet in Fräs leopardhalter, which are circumferentially provided on the cutting wheel.
  • a peripheral retaining groove is provided circumferentially on the tooth root, in which engages a corresponding profile on the Fräs leopardhalter.
  • the cutting teeth on cutting which are arranged at the top of the tooth root.
  • the DE 1 749 015 U , the DE 39 20 011 C3 , the DE 195 47 170 C2 , the GB 714,251 , the GB 2 053 315 A , the US 2,690,904 , the US 4,120,106 , the US 5,810,449 and the EP 1 452 686 A1 describe tooth arrangements for cutting wheels, wherein the cutting wheels are provided for changing directions of rotation.
  • the tooth arrangements have movable elements whose position is changed relative to the cutting wheel when changing the direction of rotation.
  • the US 3,629,964 and the US 3,755,933 describe chisel inserts for soil cultivation, which can be mounted in different positions.
  • the object of the invention is to develop a generic cutting tooth so that with high reliability, high efficiency and long life particularly versatile applications are given.
  • a basic idea of the invention is to make the cutting tooth mirror-symmetrical, so that both the tongue-shaped tooth root and the cutting edges are arranged symmetrically to the same mirror plane.
  • a cutting tooth is provided with at least two opposing cutting edges which intersect in opposite directions.
  • the cutting tooth according to the invention can always be brought intersecting with the upcoming soil even with reversing direction of rotation of the cutting wheel.
  • This method of operation is of particular interest in the so-called "cutter soil mixing" process, in which the milled soil material for producing hardened diaphragm wall panels in the slot is mixed by a cutting wheel effect with a binder.
  • the reversing direction of rotation of the cutting wheels allows a particularly good mixing of the settable suspension.
  • the milled soil material can be further digested and crushed by the changing direction of rotation of the cutting wheels.
  • a tongue-shaped tooth root can be understood in particular a side view of a U-shaped tooth root and / or a tooth root, which has a rectangular side part and a semicircular foot part in side view.
  • the cutting edges are arranged according to the invention on the head side of the tooth root, which faces away from the semicircular foot part.
  • the cutting edges according to the invention are expediently carbide cutters.
  • a trench wall cutter Under a trench wall cutter can be understood in particular a milling machine with a frame, on the underside of cutting wheels are arranged, which can milled soil material when vertical lowering of the frame in the ground below the frame and thereby create a slot.
  • the cutting wheels of the trench wall cutter together have a rectangular milling cross section.
  • at least four cutting wheels can be provided. These four cutting wheels are expediently arranged in the form of two pairs of cutting wheels, the two cutting wheels of each pair of cutting wheels having a common axis of rotation.
  • the two common axes of rotation are expediently arranged in parallel, and preferably each of the cutting wheels of a cutting wheel pair is aligned with a cutting wheel of the adjacent cutting wheel pair.
  • the plane of symmetry is perpendicular to a U-shaped side surface of the tooth root. In this way, a particularly compact and at the same time robust tooth arrangement can be obtained.
  • the plane of symmetry runs at least approximately perpendicular to the cutting direction of the cutting edges and / or through a longitudinal axis of the tooth root.
  • a plane of symmetry may also be provided parallel to the U-shaped side surface of the tooth root.
  • the cutting tooth is formed mirror-symmetrically to a further plane of symmetry, which is perpendicular to the aforementioned plane of symmetry. This allows a particularly uniform application of force and thus a particularly good cutting action.
  • the cutting edges are at least partially polyhedron-shaped.
  • an exposed portion of the cutting can be polyhedron-shaped.
  • the cutting edges each have at least one cutting edge.
  • the respective cutting edge can be wedge-shaped.
  • Each cutting edge can also have several cutting edges.
  • it can be provided that a plurality of cutting edges of the cutting converge on a cutting tip.
  • at least one cutting edge is provided, which extends at least approximately parallel to the surface of symmetry, that is with the symmetry surface forms an angle ⁇ 20 °.
  • the cutting tooth has at least one head-side W-profile, which preferably extends over both oppositely arranged cutting.
  • the cutting tooth on the head side in particular in side view and / or viewing direction parallel to the plane of symmetry, at least one W-shaped edge which is partially formed by the two opposite cutting, in particular by cutting edges of the cutting.
  • Such a W-profile allows a reliable attachment of the cutting edges on the tooth root.
  • this arrangement can allow a reversing rotary operation of the cutting wheel, without it being necessary to provide the cutting tooth movable on the cutting wheel.
  • a particularly compact and robust arrangement is given by the fact that the plane of symmetry of the cutting tooth extends through a central vertex of the head-side W-profile, and / or that the outer legs of the head-side W-profile are at least partially formed by the cutting.
  • the outer legs may be formed by wedge-shaped cutting edges of the blades.
  • the inner legs of the head-side W-profile are expediently formed by the tooth root, in particular of wedge-shaped edges of the tooth root.
  • the cutting tooth according to the invention can be used for a reversing Fräsrad ist without this he would have to be stored on the cutting wheel movable. It is thus particularly advantageous that the cutting edges are arranged immovably on the tooth root, and / or that the tooth root is arranged immovably on the cutting wheel.
  • the two cutting edges are each designed as double cutting edges, in particular with parallel cutting edges.
  • the two opposite Each cut two individual cutting elements, which are preferably connected.
  • the individual cutting edges are expediently polygonal-shaped, at least in regions.
  • the double cutting edges have parallel cutting edges, that is to say at least one of the cutting edges of one of the individual cutting edges is formed parallel to a cutting edge of the other individual cutting edge of the respective double cutting edge.
  • the double cutters expediently have a plurality of parallel cutting edges.
  • a particularly robust arrangement is given by the fact that the two individual cutting edges are arranged adjacent to a double cutting edge, preferably abut each other. Conveniently, the double cutting edges are each formed in one piece.
  • the individual cutting edges can in particular be wedge-shaped.
  • the double cutters preferably at least when viewed perpendicularly to the plane of symmetry, have a W-shaped profile.
  • the left legs of the W-shaped profile can be formed by a first single cutting edge and the right leg of the W-shaped profile of a second single cutting edge of the same double cutting edge.
  • cutting edges are formed at the off-center vertices of the W-shaped profile.
  • the W-shaped profile of the double cutters in the tooth root is continued and preferably passes through the plane of symmetry.
  • a W-profile is given both in the section of the double cutters and in the section of the head-side Zahnfußabiteses, which connects the double cutting edges.
  • the double cutters it is advantageous for the double cutters to have a W-shaped profile when viewed from above on the tooth head and / or when viewed parallel to the plane of symmetry.
  • the mechanical load capacity of the cutting tooth can be further increased by providing at least one pyramid-shaped cutting support structure at the tooth root in the region of the cutting edges.
  • each individual cutting edge has a pyramidal cutting support structure.
  • the cutting support structure may in particular have the shape of a leaning pyramid.
  • a rectangular pyramid, preferably a square pyramid, may be provided.
  • the peripheral circumferential retaining groove has a triangular cross-section.
  • the corresponding fastening element on the milling tooth holder can then have a corresponding triangular profile.
  • a further preferred embodiment of the invention consists in that the tooth root has two retaining bores arranged mirror-symmetrically to the plane of symmetry for fastening the cutting tooth to the cutting wheel.
  • these retaining holes holding bolts can be pushed, which secure the tooth root on the Fräs leopardhalter.
  • it can be provided to secure the cutting tooth only with a single bolt on the cutting tooth holder, which is inserted through one of the retaining holes.
  • the mirror-symmetrical arrangement of the two retaining bores makes it possible to turn the tooth on the cutting tooth holder and to use the same bolt arrangement even when the cutting tooth is reversed.
  • the retaining holes can pierce the retaining groove at least partially. In this case, the bolts can be secured in the fastening element of the cutting wheel, which corresponds to the retaining groove.
  • a tool bore for a removal tool is provided in the tooth root.
  • a force can be applied to the tooth root, with which the tooth root can be released from the corresponding Fräs leopardhalter.
  • the axis of the tool bore extends in the plane of symmetry.
  • the tool bore is offset from the holding holes towards the tooth head.
  • the invention also relates to a construction machine, in particular a trench wall cutter, with at least one cutting wheel on which at least one cutting tooth according to one of the preceding claims is arranged.
  • the cutting tooth shown in the figures has a tongue-shaped tooth root 1, which in side view (FIG. Fig. 1 ) Is U-shaped.
  • the tooth base 1 is circumferentially surrounded by a likewise U-shaped retaining groove 11. How the particular FIGS. 2 and 4 show, this retaining groove 11 in cross-section on a triangular profile, which extends into the tooth root 1 inside.
  • the tooth root 1 is delimited by two parallel side surfaces which run along the tooth root from bottom to top.
  • a respective cutting edge 2, 2 ' is arranged on opposite Zahnfußdon.
  • the cutting edges 2, 2 ' are each designed as double cutting and, as such, have two wedge-shaped individual cutting edges. In the figures, only the individual cutting edges 22, 22 'of the cutting edge 2 are provided with reference numerals.
  • the second cutting edge 2 ' is formed analogously with two individual cutting edges.
  • the individual cutting edges 22, 22 'each have a double wedge structure with two approximately mutually perpendicular, merging wedges, each of the two wedges defining a cutting edge 33 or 34 ( Fig. 1 ).
  • the lateral cutting edge 33 and the upper cutting edge 34 run together in each case in a cutting tip 35 of the associated individual cutting edge 22.
  • each of the cutting support structures 15 supports in each case one of the individual cutting edges 22.
  • the respective individual cutting edge 22 bears against a lateral surface of the respective cutting support structure 15.
  • the tooth root has a taper to prevent unnecessary tooth root wear.
  • the entire cutting tooth including the tooth root 1, the cutting edges 2, 2 ', the holding bores 18, 18' and the tool bore 19, is mirror-symmetrical to a first plane of symmetry 71 (FIG. FIGS. 1 and 4 ) educated.
  • This plane of symmetry runs in Fig. 1 perpendicular to the drawing plane and Fig. 2 parallel to the plane from the tooth tip to the tooth base. Due to the mirror symmetry to the plane of symmetry 71 of the cutting tooth is suitable for a milling operation in opposite directions of milling (to the left and to the right in Fig. 1 ).
  • the cutting tooth is also mirror-symmetrical to a second plane of symmetry 72 (FIG. FIGS. 2, 3 and 4 ) educated.
  • the second plane of symmetry 72 runs perpendicular to the first plane of symmetry 71 from the tooth tip to the tooth root.
  • the second plane of symmetry 72 extends through the cutting edges 2, 2', between the two individual cutting edges 22 and 22 ', parallel to the drawing plane Fig. 1 and perpendicular to the plane of the Fig. 2 ,
  • the cutting tooth on a head-side W-profile 21 As in particular in Fig. 1 can be seen, the cutting tooth on a head-side W-profile 21.
  • This W-profile is formed on the outside by the two cutting edges 2, 2 'and on the inside by the tooth root 1.
  • the middle vertex of the W-profile 21 is located in the plane of symmetry 71.
  • the outer legs of the W-profile are formed by the upper cutting edges 34 of the two blades 2 and 2 '.
  • Fig. 2 shows, form the two individual cutting edges 22, 22 'with their wedge structures in front view of the cutting tooth, so with a view in cutting direction of Cutting 2 ( Fig. 2 ), another W-shaped profile 29.
  • This inverted W-shaped profile 29 protrudes on the top of the tooth head.
  • the off-center vertices of the W-shaped profile 29 are formed by the upper cutting edges 34.
  • this inverted W-shaped profile 29 extends over the entire head side of the cutting tooth, that is, the W-shaped profile 29 is both in the area of the cutting edges 2, 2 'and in the head-side Zahnfuß Scheme 60, which between the cutting edges 2, 2 'lies, given.
  • FIG. 3 Another reverse W-shaped profile 30 is in plan view ( Fig. 3 ).
  • This profile 30, which protrudes on the front side of the tooth head, is formed by the second wedge shape of the double wedge structure of the two individual cutting edges 22, 22 ', that is, the off-center vertex of the other W-shaped profile 30 are formed by the lateral cutting edges 33.
  • the cutting tooth is received in a cutting tooth holder, not shown, of a cutting wheel.
  • a corresponding profile element engages in the retaining groove 11 and secures the cutting tooth on the Fräs leopardhalter.
  • a retaining bolt can then be introduced into one of the two retaining bores 18 or 18 '.
  • the cutting wheel is then set in rotation, wherein the cutting edge leading in the cutting direction 2 or 2 'ablates existing soil material.
EP10001172.5A 2009-02-12 2010-02-04 Fräszahn für eine Schlitzwandfräse Active EP2218829B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202009001814U DE202009001814U1 (de) 2009-02-12 2009-02-12 Fräszahn für eine Schlitzwandfräse

Publications (3)

Publication Number Publication Date
EP2218829A2 EP2218829A2 (de) 2010-08-18
EP2218829A3 EP2218829A3 (de) 2013-06-12
EP2218829B1 true EP2218829B1 (de) 2014-11-12

Family

ID=40586336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10001172.5A Active EP2218829B1 (de) 2009-02-12 2010-02-04 Fräszahn für eine Schlitzwandfräse

Country Status (5)

Country Link
US (1) US8051588B2 (zh)
EP (1) EP2218829B1 (zh)
KR (1) KR101238671B1 (zh)
CN (1) CN101806081B (zh)
DE (1) DE202009001814U1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101753802B1 (ko) 2010-09-20 2017-07-04 엘지디스플레이 주식회사 터치 스크린이 내장된 액정 표시장치와 이의 제조방법
EP2687639A1 (de) 2012-07-18 2014-01-22 BAUER Maschinen GmbH Fräszahn
NO336726B1 (no) 2013-12-27 2015-10-26 Kverneland Group Operations Norway As Beskyttelsesplate for slitedelfeste samt fremgangsmåte for slitasjemessig beskyttelse av et slitedelfeste
FI126490B (fi) * 2015-10-23 2017-01-13 Allu Finland Oy Seulamurskaimen työrummun vaihdettava teräpala ja teräpalan pidin
DE102022129091A1 (de) 2022-11-03 2024-05-08 Heller Tools Gmbh Bohrkrone für einen dreh-hämmernden oder dreh-schlagenden Einsatz zum Durchtrennen von Armierungseisen in Beton

Citations (1)

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US4120106A (en) * 1977-04-14 1978-10-17 Cmi Corporation Sidebank excavator with rotating vertical cutter assembly

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Also Published As

Publication number Publication date
DE202009001814U1 (de) 2009-04-30
EP2218829A3 (de) 2013-06-12
EP2218829A2 (de) 2010-08-18
KR20100092385A (ko) 2010-08-20
US20100205835A1 (en) 2010-08-19
KR101238671B1 (ko) 2013-03-04
US8051588B2 (en) 2011-11-08
CN101806081B (zh) 2013-04-10
CN101806081A (zh) 2010-08-18

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