EP2540451A2 - Outil de burinage - Google Patents

Outil de burinage Download PDF

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Publication number
EP2540451A2
EP2540451A2 EP12002865A EP12002865A EP2540451A2 EP 2540451 A2 EP2540451 A2 EP 2540451A2 EP 12002865 A EP12002865 A EP 12002865A EP 12002865 A EP12002865 A EP 12002865A EP 2540451 A2 EP2540451 A2 EP 2540451A2
Authority
EP
European Patent Office
Prior art keywords
chisel
cutting edge
replacement
reinforcing
tool according
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.)
Withdrawn
Application number
EP12002865A
Other languages
German (de)
English (en)
Other versions
EP2540451A3 (fr
Inventor
Rainer Lampe
Heinrich Kersten
Falk Richter
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.)
Heller Tools GmbH
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP2540451A2 publication Critical patent/EP2540451A2/fr
Publication of EP2540451A3 publication Critical patent/EP2540451A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/275—Tools having at least two similar components
    • B25D2250/285—Tools having three or more similar components, e.g. three motors

Definitions

  • the invention relates to a chisel tool according to the preamble of claim 1.
  • Chisel tools of the type in question are equipped with a chisel head, a chisel shank and an insertion end, which are arranged one behind the other along a longitudinal axis of the chisel.
  • the chisel head has at its free axial end a chisel cutting edge, which is responsible for the material removal.
  • Such chisel tools are primarily used as a rock chisel.
  • the insertion end of the chisel tool is adapted to be inserted into the chuck of a hammer drill, a chisel hammer or the like.
  • the insertion end is then equipped with an SDS-Plus interface, an SDS-Max interface or the like.
  • the well-known chisel tool ( DE 100 57 124 A1 ), from which the invention proceeds, has the above basic structure.
  • the known chisel tool can be formed as a pointed chisel with a tapered cutting edge or as a flat or Spatm facedeltechnikmaschine with a correspondingly flat chisel cutting edge.
  • Each bit tool is subject to some tool wear due to the bit engagement between the bit edge and the material to be chiseled.
  • the tool wear manifests itself in a plastic deformation of the chisel cutting edge, but above all in a removal of tool material in the area of the chisel cutting edge.
  • With the chisel operation is correspondingly accompanied by a continuous shortening of the chisel tool.
  • the invention is based on the problem of designing and further developing the known bit tool in such a way that the operating costs attributable to the bit tool are reduced.
  • the proposed solution is based on the fundamental idea of equipping the chisel head with at least one replacement cutting edge, which at least partially replaces the function of the chisel cutting edge after a certain tool wear.
  • bit head axially offset from the bit cutting edge forms at least one replacement blade which is exposed by the removal of tool material due to tool wear and then replaces at least a portion of the bit edge.
  • the term "axial" is in this case always based on the longitudinal axis of the bit.
  • exposing the replacement blade is meant in general that the replacement blade in the exposed state forms at least part of the contact surface of the bit tool to be chiseled material.
  • the replacement of the original chisel cutting edge by the at least one replacement cutting edge automatically accompanies the tool wear, so that the replacement cutting edge then provides at least part of the cutting edge, preferably the entire cutting edge.
  • the tool wear exposing the replacement cutting edge can basically only be attributed to an abrasion process on the bit stacker.
  • the tool wear exposing the replacement blade is partly due to an abrasion process and partly to a fracturing operation on the bit head (claim 2).
  • the exposure of the replacement blades can then be set very precisely.
  • the original chisel cutting edge and the replacement blades along the chisel longitudinal axis are arranged one behind the other.
  • the original chisel cutting edge and the replacement cutting edges are arranged directly behind one another along the longitudinal axis of the cutting bit.
  • each replacement cutting edge forms a taper in a cross section parallel to the longitudinal axis of the bit, which forms at least a portion of the bit edge after the corresponding replacement cutting edge has been exposed.
  • a reinforcing structure for reinforcing the chisel tool here and preferably a transition region between the respective cutting is provided.
  • the chisel tool in question is a flat chisel or a latex chisel. This variant is easy to produce and at the same time ensures a particularly high mechanical stability.
  • the chisel tool is designed as a pointed chisel.
  • the reinforcing members enclose the here and preferably pyramidal replacement blades on the side edges of the respective pyramidal shape.
  • the illustrated chisel tools have a chisel head 1, a chisel shank 2 and an insertion end 3, which are arranged one behind the other along a chisel longitudinal axis 4.
  • the chisel head 1 is equipped at its free axial end with a chisel cutting edge 5, which determines the chisel engagement with the material to be chiseled.
  • the above "wandering" of the chisel cutting edge 5 is utilized in order to effect an automatic and continuous replacement of a blunt cutting edge 5 against a replacement cutting edge 7 to be explained later.
  • the chisel head 1 axially offset from the chisel cutting edge 5 at least one replacement cutting edge 7, in Fig. 2 a total of six replacement blades 7a-f, from, wherein the replacement blades 7 are not exposed when still unused chisel tool, ie in the original state, and are located within the chisel head 1.
  • the replacement blades 7 are designed here, and preferably in a substantially parallel to the longitudinal axis of the chisel 4 cross-section substantially wedge-shaped.
  • the replacement blades 7 are exposed one after the other, wherein in each case the replacement blade 7 just exposed replaces the original cutter blade 5 in part.
  • the shape of the original chisel cutting edge 5 is the view A in the Fig. 2 and 4 refer to.
  • bit operation by the action of the bit tool in chisel 6 causes first the wear-related removal of tool material in the area of the original chisel cutting edge 5, which in the illustrations according to Fig. 2 . 4 . 7 and 9 each clearly visible.
  • the above tool wear first causes the contact surface of the chisel cutting edge 5 to increase, the chisel cutting edge 5 becomes duller.
  • the replacement cutting edge 7a itself acts as a chisel cutting edge 5, which wears as above until the second replacement cutting edge 7b is uncovered. This in turn is accompanied by a corresponding sharpening of the chisel tool.
  • the tool wear that causes the release of the respective replacement cutting edge 7 can basically only be attributed to an abrasion process on the bit head 1, which ensures a high level of continuity during the exposure. In a particularly preferred embodiment, however, it is provided that the exposure of the replacement blade 7 causing tool wear only partially due to an abrasion process and partly also on a fracture process on the chisel head 1. As indicated above, the exposure can then be precisely controlled by a corresponding structural design.
  • each of the replacement blades 7 is made sharp as possible.
  • the weakening of the chisel head 1 in the area of the replacement blades 7 can best be seen in the sectional views BB in FIG Fig. 2 and 4 remove.
  • a reinforcing structure 8 for reinforcing the chisel head 1, here and preferably in each case of the axial transition region between two cutting edges 5, 7, is provided.
  • the reinforcing structure 8 preferably extends substantially axially and preferably adjacent to a region between two cutting edges 5, 7.
  • the reinforcing structure 8 extends essentially over the entire bit head 1 along the longitudinal axis 4 of the bit.
  • the reinforcing structure 8 has at least two axially extending reinforcing parts 9a-d on which laterally surround the at least one replacement cutting edge 7. It is essential in all the illustrated embodiments that at least a part of the reinforcing parts 9a-d are elongated.
  • the reinforcing members 9a, 9b here and preferably are designed substantially rod-like, in particular cylindrical. It is also conceivable, however, for the reinforcing parts 9a, 9b to be deviating therefrom, in particular cuboidal. It is also conceivable, however, the realization of rib-shaped reinforcing parts 9e-h, as in the still to be explained Fig. 6 to 9 is shown.
  • the reinforcing members 9a, 9b perpendicular to the flat side of the chisel tool have a width which is smaller, equal to or greater than the corresponding width of the intermediate replacement cutting 7.
  • the reinforcing members 9a, 9b themselves form additional replacement blades 11 af which, like the replacement blades 7a-f explained above, are successively exposed and then replace part of the original bit 5.
  • Particularly advantageous is the fact that the obstruction of the chisel operation by the reinforcing members 9 as mentioned above can be significantly reduced.
  • a further preferred variant, not shown here, provides that the additional replacement cutting edges 11 are arranged axially offset relative to the replacement cutting edges 7 surrounded by the reinforcing parts 9. On the one hand a good chisel progress and on the other hand a high mechanical stability can be achieved.
  • the shape of the at least one replacement cutting edge 7 at least partially substantially corresponds to the shape of the original chisel cutting edge 5. This has been implemented in all illustrated and insofar preferred embodiments.
  • the chisel cutting edge 5 and the at least one replacement cutting edge 7 in all the illustrated embodiments run essentially pointed towards the free end of the chisel head 1, here and preferably the chisel cutting edge 5 and the at least one replacement cutting edge 7 facing in a free end of the chisel head 1, axial direction of the chisel edge 5 more sharply than in the remaining axial region of the chisel cutting edge 5.
  • the chisel cutting edge 5 and the at least one replacement cutting edge 7 are sharpened as it were.
  • each replacement blade 7 is provided, which are arranged axially one behind the other, more preferably the chisel head 1 in the area the replacement cutting edge 7 is configured substantially sawtooth-like in a cross-section parallel to the longitudinal axis of the bit 4. This ensures that a blade 5, 7 immediately follows a replacement blade 7, without any "blunt" intermediate sections are interposed.
  • the sawtooth-like configuration can be provided on one side or, as shown, on both sides.
  • Fig. 4 shows that there are the reinforcing parts 9 in cross-section parallel to the longitudinal axis of the chisel 4 also sawtooth configured, which ultimately goes back to the realization of the additional replacement blades 11.
  • the saw tooth structure is shown on the flat front and back sides of the chisel tool. It is also conceivable that the free side surfaces of the reinforcing members 9 are equipped with a sawtooth structure.
  • the sawtooth structures are edged or at least partially rounded.
  • an optimization with regard to possible wedge effects can be made.
  • the chisel tool is designed as a latex chisel.
  • the original cutting edge 5 extends essentially transversely to the longitudinal axis of the bit 4, here and preferably even in a straight line.
  • the replacement blades 7 also run essentially transversely to the longitudinal axis of the bit 4, here and preferably also a substantially rectilinear course of the replacement blades 7 is provided. This corresponds to the above proposal to adapt the shape of the replacement blades 7 to the shape of the original chisel cutting edge 5.
  • Fig. 5a shows, for example, that the replacement blades 7 extend in the chisel direction 6 convex.
  • convex in the chisel direction is meant that the convex protrusion is provided in the chisel direction 6.
  • the replacement blades 7 run convexly counter to the direction of the bit 6. This is in Fig. 5b shown.
  • Fig. 5c are the replacement blades 7 set against a transversely to the longitudinal axis of the chisel 4 extending reference axis.
  • the angle of attack ⁇ is here and preferably in a range between 25 ° and 55 °, in particular at about 40 °. The resulting asymmetry can bring a particularly advantageous effect in terms of vibration reduction with it.
  • the replacement blades 7 in the chisel 6 ( Fig. 5d ) or against the chisel direction 6 (FIG. Fig. 5e ) are designed arrow-shaped. Depending on the material to be chiseled, the chisel progress can be optimized.
  • the two reinforcing parts 9a, 9b run here and preferably parallel to one another and parallel to the longitudinal axis of the bit 4.
  • the width of the chisel head 1 perpendicular to the flat side of the chisel head 1 along the longitudinal axis of the chisel 1 can be provided substantially constant.
  • the width of the chisel head 1, in particular the replacement cutting edges 7 and / or the reinforcing parts 9, increases counter to the chisel direction 6, which leads to a high mechanical stability in the chisel direction 6.
  • the proposed chisel tool is designed as a chisel.
  • the original chisel blade 5 is substantially cone-shaped, designed here and preferably pyramid-shaped.
  • original chisel cutting 5 a pyramid shape with a substantially square base. Conceivable are pyramid shapes with a largely arbitrary number of corners in the base.
  • pyramid shape is to be understood broadly.
  • the side surfaces of the pyramidal shape may also be substantially concave.
  • the replacement cutting edges 7 are also substantially cone-shaped, here and preferably pyramid-shaped.
  • a substantially sawtooth-like structure is evident, as in the sectional views BB in FIGS Fig. 7 and 9 is shown.
  • a reinforcing structure 8 is provided.
  • the reinforcing parts 9a-d or 9e-h enclose the pyramidal replacement cutting edges 7 on the side edges of the respective pyramidal shape.
  • rib-like reinforcing parts 9e-h are provided, which laterally surround the substantially conical replacement blades 7, wherein the rib-like reinforcing members 9e-h relative to the longitudinal axis of the chisel 4 are substantially radially aligned and axially between two replacement blades 7, here and preferably also between the first replacement cutting edge 7a and the original cutting edge 5.
  • the rib-like reinforcing parts 9e-h form wall sections, which in any case engage with the replacement blades 7. Characterized in that the reinforcing parts 9e-h are stressed in the chisel operation primarily on pressure, results in a mechanical structure with a high mechanical resistance moment.
  • this originally strong structure is deliberately weakened in the course of chisel operation, if it is violated by the attributable to the tool wear erosion of tool material. This weakening may result in a controlled acceleration of the exposure of the next replacement blade 7.
  • the targeted weakening mentioned above can be controlled, for example, by a suitable design of the rib-like reinforcing parts 9e-h. It can be the representations according to the Fig. 6 to 9 For example, it can be seen that the height of the ribs 9e-h, in this case the radial extension of the ribs 9e-h, is lowest in the axial regions of the tips of the replacement blades 7.
  • the concomitant weakening of the ribs 9e-h can be used to a certain extent as a predetermined breaking point.
  • the ribs in each case in the region which is to serve as a predetermined breaking point be designed to be thinner than in the remaining regions of the ribs.
  • the reinforcing structure 8 is in the in the Fig. 8 . 9 illustrated embodiment exclusively of rib-like reinforcing parts 9e-h, which simplifies the production of the chisel tool.
  • rod-like reinforcing parts 9a-d are additionally provided, which lead to additional stabilization.
  • the rod-like reinforcing parts 9a-d taper in sections towards the insertion end 3, namely along a replacement cutting edge 7, which leads to a step-like nature of the rod-like reinforcing parts 9a-d. By this stage, in turn, predetermined breaking points arise between two replacement blades 7, which has a favorable effect on the controlled exposure of the respective replacement blade 7.
  • the rib-like reinforcing parts 9e-h at least partly bridge a radial area between a replacement cutting edge and a rod-like reinforcing part 9a-d. This makes it possible to set a high mechanical resistance moment for the chisel operation.
  • the views A in the Fig. 7 and 9 each show that the original chisel cutting edge 5 in plan view is designed substantially star-shaped and according to Fig. 6 to 9 has four star-shaped extending cutting portions 5a-d.
  • formal matching of the replacement blades 7 to the original chisel blade 5 it is further preferably such that the exposed replacement blades 7 are also configured star-shaped in plan view, which is the view DD in the Fig. 7 and 9 each can be removed.
  • the controlled exposure of the replacement blades 7 is of particular importance here. This can be done by a suitable structural design and arrangement of the replacement cutting edges 7 on the one hand and the reinforcing structure 8 on the other hand. It can be provided in addition to the already occurring abrasion also targeted fracture operations. This relates in particular to the regularly existing tapering region between two cutting edges 5, 7, the rod-like reinforcing parts 9a-d and the rib-like reinforcing parts 9e-h. Through a targeted introduction of above-mentioned predetermined breaking points, the targeted exposure of the replacement blades 7 can be realized in a particularly simple manner.
  • the proposed chisel tool is preferably formed in one piece. With a suitable design, it can be produced without cutting or machining, in particular in the forging, casting, rolling, grinding or milling process. In principle, however, is also conceivable that the proposed chisel tool is designed in several parts. It may be advantageous to design the replacement blades 7 as insert elements. Finally, it may be advantageous to design the chisel head, the chisel shank 2 and / or the insertion end 3 as separate parts which are pressed together or the like.
  • the reinforcing structure 8 is preferably optimized for a high resulting moment of resistance of the chisel head 5 with respect to a torsional and / or bending stress.
  • One possibility for this is to make the reinforcing parts 9 stronger towards the insertion end 3, in particular the rod-like reinforcing parts 9a-d for the insertion end 3 with an increasing cross-section and / or the rib-like reinforcing parts 9e-h with an increasing wall thickness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Milling Processes (AREA)
EP12002865.9A 2011-06-29 2012-04-24 Outil de burinage Withdrawn EP2540451A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201120103209 DE202011103209U1 (de) 2011-06-29 2011-06-29 Meißelwerkzeug

Publications (2)

Publication Number Publication Date
EP2540451A2 true EP2540451A2 (fr) 2013-01-02
EP2540451A3 EP2540451A3 (fr) 2016-05-25

Family

ID=46052510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12002865.9A Withdrawn EP2540451A3 (fr) 2011-06-29 2012-04-24 Outil de burinage

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EP (1) EP2540451A3 (fr)
DE (1) DE202011103209U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3928928A1 (fr) * 2020-06-22 2021-12-29 Hilti Aktiengesellschaft Outil burin doté d'une section structurée
EP4137640A4 (fr) * 2021-02-08 2024-05-01 MAPP Co., Ltd. Burin de concasseur hydraulique
EP4382255A1 (fr) * 2022-12-07 2024-06-12 Hilti Aktiengesellschaft Burin plat

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013011607B4 (de) * 2013-07-12 2017-02-02 Busch & Co. Gmbh & Co. Kg Korneisen
DE102015220634A1 (de) 2015-10-22 2017-06-29 Robert Bosch Gmbh Bohrwerkzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10057124A1 (de) 1999-11-17 2001-05-23 Hawera Probst Gmbh Meißel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB133001A (fr) *
US2203747A (en) * 1937-09-20 1940-06-11 Harvey D Sandstone Laminated disk drill bit
US4230193A (en) * 1978-12-15 1980-10-28 Arthur G. Burki Rotary drill bit
SU911024A2 (ru) * 1980-07-14 1982-03-07 Карагандинский Научно-Исследовательский,Проектно-Конструкторский И Экспериментальный Институт "Гипроуглегормаш" Резец дл горных машин
IT239729Y1 (it) * 1996-04-26 2001-03-13 Giovanni Battista Andrina Utensili per martelli demolitori con profilo speciale.
US5882152A (en) * 1997-06-09 1999-03-16 Janitzki; Bernhard M. Multi-bit drill
DE202004012846U1 (de) * 2004-08-16 2004-10-14 Wacker Construction Equipment Ag Brechwerkzeug mit Nuten zur verbesserten Spaltwirkung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10057124A1 (de) 1999-11-17 2001-05-23 Hawera Probst Gmbh Meißel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3928928A1 (fr) * 2020-06-22 2021-12-29 Hilti Aktiengesellschaft Outil burin doté d'une section structurée
EP4137640A4 (fr) * 2021-02-08 2024-05-01 MAPP Co., Ltd. Burin de concasseur hydraulique
EP4382255A1 (fr) * 2022-12-07 2024-06-12 Hilti Aktiengesellschaft Burin plat
WO2024120950A1 (fr) * 2022-12-07 2024-06-13 Hilti Aktiengesellschaft Burin plat

Also Published As

Publication number Publication date
EP2540451A3 (fr) 2016-05-25
DE202011103209U1 (de) 2012-11-23

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