EP1413403A1 - Piqueur - Google Patents

Piqueur Download PDF

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Publication number
EP1413403A1
EP1413403A1 EP03103506A EP03103506A EP1413403A1 EP 1413403 A1 EP1413403 A1 EP 1413403A1 EP 03103506 A EP03103506 A EP 03103506A EP 03103506 A EP03103506 A EP 03103506A EP 1413403 A1 EP1413403 A1 EP 1413403A1
Authority
EP
European Patent Office
Prior art keywords
area
shank
pointed chisel
axial grooves
diameter
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Withdrawn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
EP03103506A
Other languages
German (de)
English (en)
Inventor
Jozsef Szendrovari
Werner Britten
Jozsef Varaga
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1413403A1 publication Critical patent/EP1413403A1/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Withdrawn legal-status Critical Current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
    • B25D2250/211—Cross-sections of the tool
    • B25D2250/215—Narrowing cross-sections

Definitions

  • the invention relates to a pointed chisel driven by a machine tool, in particular for processing rock and concrete.
  • Such pointed chisels have an elongated shank with an insertion end on the machine side for receiving the axially limited movement in the striking machine tool and a working area which tapers to a point on the workpiece and ends in an abrasively effective tip.
  • the abrasive wear of this tip when used appropriately shortens the area of use tapering to the point of the workpiece, which increases the abrasive cross-section of the shaft and blunts the pointed chisel.
  • Shaft cross sections in the form of a concave polygon have a self-sharpening effect, which improves the mining performance.
  • the area of use forms a prismatic core diameter and the shaft cross-section forms a concave polygon with six axial grooves.
  • the concave polygon only extends radially beyond the prismatic core diameter, which means that the self-sharpening effect is only effective in the middle and late partial use area if the area of use has already become dull. In the early part-use area, however, only the prismatic core diameter without self-sharpening effect is effective.
  • the object of the invention is to realize a pointed chisel which has a particularly high removal rate in the early area of use.
  • a pointed chisel that can be driven by a machine tool has an elongated shaft with an insertion end on the machine side and a use area on the workpiece side, which has an enveloping circle diameter that tapers on the workpiece side and a shank cross section that is designed as a concave polygon with axial grooves up to a core diameter, the narrow diameter of the workpiece decreasing ,
  • the core diameter tapering in addition to the enveloping circle diameter on the workpiece side, a shank cross section formed as a concave polygon is always formed, as a result of which the self-sharpening effect is always substantially effective.
  • the tapered envelope diameter combined with a correspondingly tapered core diameter enables a particularly high removal rate to be achieved.
  • the enveloping circle diameter is advantageously tapered convexly on the workpiece side, as a result of which the removal power only decreases degressively with increasing service life.
  • the shaft cross-section is advantageously similar in terms of different, arbitrarily selectable positions of the shaft within the area of use, as a result of which the shape of the concave polygon is retained over the period of use and the self-sharpening effect always contributes to the same extent to the degradation performance.
  • the area of use advantageously has exactly 2 n- numbered axial grooves, where n is a natural number, as a result of which the axial grooves can be produced in a technologically simple manner by means of cross-section-preserving forming processes such as cold presses.
  • the area of use advantageously has exactly four, further advantageously offset between 75 ° and 105 °, axial grooves, as a result of which the pointed chisel is particularly suitable for enveloping circle diameters in the range from 12 mm to 40 mm.
  • the area of use has exactly eight axial grooves, further advantageously offset by 45 °, as a result of which the pointed chisel is particularly suitable for enveloping circle diameters in the range from 35 mm to 50 mm.
  • the shaft cross-sectional area is advantageously reduced from 40-60% of the area of use on the workpiece side to 80% to 70%, as a result of which the wave resistance increases on the workpiece side and thus the impact pulse voltage is increased.
  • the enveloping circle diameter of the area of use with the axial grooves is advantageously greater than the shaft diameter of the rest of the shaft, as a result of which the change in the cross-sectional area of the shaft in the transition region is only slight.
  • the cross-sectional areas of the shank advantageously remain the same in the transition region, as a result of which there is a low-reflection impact pulse transmission.
  • a pointed chisel which can be driven in a striking manner has an elongated shaft 1 with an insertion end 2 on the machine side and a use area 3 on the workpiece, which extends from an early partial use area A via the central partial use area B to the late partial use area C.
  • an enveloping circle diameter H that tapers convexly on the workpiece side
  • the core diameter K tapers on the workpiece side and the shaft cross-section 5 tapered to 75% on the workpiece side from 50% of the area of use 3 is self-similar with regard to different positions I, II, III, IV, V.
  • the enveloping circle diameter H of the use area 3 with the axial grooves 4 is larger than the shaft diameter S of the rest of the shaft 1, the shaft cross-sectional areas A ', A "remaining the same in the transition area.
  • the shaft cross-section 5 has exactly two axial grooves 4 offset by 180 °.
  • the shaft cross section 5 has exactly eight axial grooves 4, alternately offset by 35 ° and 55 °, which alternately form a groove web 6 with the enveloping circle diameter H and a radially smaller intermediate groove web 7 with the enveloping circle diameter h between circumferentially adjacent axial grooves 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP03103506A 2002-09-25 2003-09-23 Piqueur Withdrawn EP1413403A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10244509A DE10244509A1 (de) 2002-09-25 2002-09-25 Spitzmeissel
DE10244509 2002-09-25

Publications (1)

Publication Number Publication Date
EP1413403A1 true EP1413403A1 (fr) 2004-04-28

Family

ID=31984025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03103506A Withdrawn EP1413403A1 (fr) 2002-09-25 2003-09-23 Piqueur

Country Status (8)

Country Link
US (1) US6981496B2 (fr)
EP (1) EP1413403A1 (fr)
JP (1) JP4482303B2 (fr)
CN (1) CN100341673C (fr)
AU (1) AU2003244606C1 (fr)
DE (1) DE10244509A1 (fr)
HU (1) HU224801B1 (fr)
ZA (1) ZA200307420B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009043617A1 (fr) * 2007-09-28 2009-04-09 Robert Bosch Gmbh Burin notamment destiné à des machines à entraînement motorisé
DE202013003876U1 (de) 2013-03-04 2013-06-25 BBG Baugeräte GmbH Brechwerkzeug
USD734792S1 (en) 2013-03-15 2015-07-21 Black & Decker Inc. Drill bit
US9085074B2 (en) 2011-03-22 2015-07-21 Black & Decker Inc. Chisels
USD737875S1 (en) 2013-03-15 2015-09-01 Black & Decker Inc. Drill bit

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007326198A (ja) * 2006-06-09 2007-12-20 Furukawa Co Ltd チゼル
US20120074659A1 (en) 2010-09-29 2012-03-29 Henry H. Hamilton Tool assembly and related methods
US8449041B2 (en) * 2010-10-27 2013-05-28 Sandvik Intellectual Property Ab Grading pick with extended fins
DE102012202300A1 (de) * 2012-02-15 2013-08-22 Hilti Aktiengesellschaft Meißel
JP5203524B1 (ja) * 2012-06-12 2013-06-05 関門港湾建設株式会社 十文字型砕岩棒
US9333564B2 (en) 2013-03-15 2016-05-10 Black & Decker Inc. Drill bit
USD756741S1 (en) * 2014-04-10 2016-05-24 Robert Bosch Gmbh Chisel
CN105178866A (zh) * 2015-10-10 2015-12-23 广西恒日科技股份有限公司 一种锥型凿岩钻头
EP3222390A1 (fr) * 2016-03-23 2017-09-27 HILTI Aktiengesellschaft Burin
US10876401B1 (en) * 2016-07-26 2020-12-29 The Sollami Company Rotational style tool bit assembly
US10507568B2 (en) * 2016-12-15 2019-12-17 Caterpillar Inc. Hammer work tool having multi-position retention collar
CN108798694A (zh) * 2018-07-18 2018-11-13 韩睿 一种钎杆和液压破碎锤机构及其掘进方法
DE102018133250A1 (de) 2018-12-20 2020-06-25 Drebo Werkzeugfabrik Gmbh Spitzmeißel
USD922840S1 (en) 2019-05-06 2021-06-22 Milwaukee Electric Tool Corporation Chisel
USD922841S1 (en) 2019-05-06 2021-06-22 Milwaukee Electric Tool Corporation Chisel
USD922842S1 (en) 2019-05-06 2021-06-22 Milwaukee Electric Tool Corporation Chisel
USD921465S1 (en) 2019-05-06 2021-06-08 Milwaukee Electric Tool Corporation Mortar knife
USD923447S1 (en) 2019-05-06 2021-06-29 Milwaukee Electric Tool Corporation Chisel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR591042A (fr) 1924-12-27 1925-06-26 Meudon Forges Atel Periectionnements aux marteaux pneumatiques piqueurs
DE463571C (de) 1928-08-01 Ed Doerrenberg Soehne Ohg Mehrkantiges Spitzeisen fuer Abbauhaemmer
DE828385C (de) * 1950-11-21 1952-01-17 Stahlhammerwerk Kruener G M B Spitzeisen fuer Abbauhaemmer
DE1266249B (de) * 1964-05-25 1968-04-11 Ingersoll Rand Co Schlagwerkzeug zum Bohren und Brechen von Beton
EP0156789A1 (fr) 1984-02-28 1985-10-02 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Outil pour briser les roches
DE19914522A1 (de) 1999-03-30 2000-10-05 Wacker Werke Kg Brechwerkzeug, insbesondere Meißel für maschinell angetriebene Schlagwerkzeuge

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US991830A (en) * 1910-03-07 1911-05-09 Charles J Clements Drill.
US1532468A (en) * 1922-04-05 1925-04-07 Bawden Samuel Rock-drill bit
US1551717A (en) * 1924-09-05 1925-09-01 Armstrong Mfg Company Drill bit
US2629588A (en) * 1948-03-25 1953-02-24 Neamand Vincent Tool for breaking concrete and the like
FR2486853B1 (fr) * 1980-07-18 1985-12-20 Brunon Louis Outil de choc comportant une extremite de frappe et une extremite active de coupe, et son procede de fabrication
DE3226568C2 (de) * 1982-07-16 1984-05-17 Gustav Dr.-Ing. 4300 Essen Jenne Rammkopf für pneumatische Rammgeräte
AT381392B (de) 1984-03-29 1986-10-10 Sprecher & Schuh Ag Elektronischer druckschreiber
DE4024650A1 (de) * 1990-08-03 1992-02-06 Hilti Ag Meissel mit optimiertem schaft
DE4228985A1 (de) * 1992-08-31 1994-03-03 Hilti Ag Meisselwerkzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463571C (de) 1928-08-01 Ed Doerrenberg Soehne Ohg Mehrkantiges Spitzeisen fuer Abbauhaemmer
FR591042A (fr) 1924-12-27 1925-06-26 Meudon Forges Atel Periectionnements aux marteaux pneumatiques piqueurs
DE828385C (de) * 1950-11-21 1952-01-17 Stahlhammerwerk Kruener G M B Spitzeisen fuer Abbauhaemmer
DE1266249B (de) * 1964-05-25 1968-04-11 Ingersoll Rand Co Schlagwerkzeug zum Bohren und Brechen von Beton
EP0156789A1 (fr) 1984-02-28 1985-10-02 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Outil pour briser les roches
DE19914522A1 (de) 1999-03-30 2000-10-05 Wacker Werke Kg Brechwerkzeug, insbesondere Meißel für maschinell angetriebene Schlagwerkzeuge

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009043617A1 (fr) * 2007-09-28 2009-04-09 Robert Bosch Gmbh Burin notamment destiné à des machines à entraînement motorisé
US9085074B2 (en) 2011-03-22 2015-07-21 Black & Decker Inc. Chisels
US9333635B2 (en) 2011-03-22 2016-05-10 Black & Decker Inc. Chisels
DE202013003876U1 (de) 2013-03-04 2013-06-25 BBG Baugeräte GmbH Brechwerkzeug
USD734792S1 (en) 2013-03-15 2015-07-21 Black & Decker Inc. Drill bit
USD737875S1 (en) 2013-03-15 2015-09-01 Black & Decker Inc. Drill bit

Also Published As

Publication number Publication date
HU224801B1 (hu) 2006-02-28
US20040069292A1 (en) 2004-04-15
DE10244509A1 (de) 2004-04-08
HUP0303119A2 (hu) 2004-11-29
US6981496B2 (en) 2006-01-03
HU0303119D0 (en) 2003-11-28
CN100341673C (zh) 2007-10-10
ZA200307420B (en) 2004-07-01
AU2003244606A1 (en) 2004-04-22
AU2003244606C1 (en) 2008-10-23
CN1496791A (zh) 2004-05-19
JP2004114294A (ja) 2004-04-15
JP4482303B2 (ja) 2010-06-16
AU2003244606B2 (en) 2008-01-17

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