EP1468790B1 - Burin plat - Google Patents

Burin plat Download PDF

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Publication number
EP1468790B1
EP1468790B1 EP04008401A EP04008401A EP1468790B1 EP 1468790 B1 EP1468790 B1 EP 1468790B1 EP 04008401 A EP04008401 A EP 04008401A EP 04008401 A EP04008401 A EP 04008401A EP 1468790 B1 EP1468790 B1 EP 1468790B1
Authority
EP
European Patent Office
Prior art keywords
chisel
flat chisel
flat
impact
rib
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.)
Expired - Lifetime
Application number
EP04008401A
Other languages
German (de)
English (en)
Other versions
EP1468790A1 (fr
Inventor
Franc Koljaka
Cristian Falchetti
Alfred Leibundgut
Andrew Dargie
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1468790A1 publication Critical patent/EP1468790A1/fr
Application granted granted Critical
Publication of EP1468790B1 publication Critical patent/EP1468790B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/72—Stone, rock or concrete

Definitions

  • the invention relates to a flat chisel according to the preamble of claim 1.
  • Such flat chisels are used in the processing of rocks, in particular masonry to use, for example, to produce openings, channels and slots.
  • Flat chisels with different elevations on the striking surfaces are known from the prior art. In particular, are from the WO 01/36163 Flat chisel known.
  • Such flat chisels should be improved in terms of their destructive or refractive effect
  • V-ribs have a chisel cutting edge facing first flat long area and an underlying, to the chisel shaft oriented short connection area.
  • Such a V-rib has the disadvantage that the bit with such V-ribs has only a small blasting or refractive power for the material to be treated.
  • the invention has for its object to develop a flat chisel, which has an increased crushing and destructive force in a near-cutting region over the entire width of the cutting edge.
  • the flat chisel according to the invention has at least one wedge rib on at least one of the striking surfaces, which is characterized by a short front section steeply rising in comparison to the striking surface and a long second section sloping flat towards the longitudinal axis.
  • Such a trained flat chisel is initially determined by the penetrating into the material main cutting edge in its direction of action and has on further penetration into the material an increased blasting or refractive power, which is generated by the rising steeply from the club face impact section of the V-rib , It is important that the impact section is small and set back relative to the main cutting edge in order to brake the penetration of the flat bit into the material by the V-rib only slightly.
  • the impact section is the region of the V-rib, with which this acts primarily on the material to be processed.
  • the impact section is followed by the support section, which, viewed counter to the effective direction of the flat chisel, lies in the slipstream of the striking section.
  • the support section has the task to stabilize the impact section and to ensure that the bit can be easily pulled out of this with a complete penetration of the bit head in the material to be machined. This ensures the support section by its elongated, approximately parallel course to the longitudinal axis of the bit, because this barb-like behavior of the V-rib is prevented.
  • the main cutting edge length is about the cross cutting length or face length approximately in a ratio of 5: 1 to 10: 1, in particular 7: 1 based on the effective lengths of the cutting or striking surface in the effective direction x of the flat chisel.
  • the chisel on a V-rib which rises in front view with two triangular surfaces of the club face, the surfaces together form a transverse cutting edge to the main cutting edge and wherein the survey is completed pyramid-like by two more triangular surfaces. Due to the cross-cutting edge and the surfaces, a deep penetration of the V-rib into the material to be processed is particularly favored.
  • the cutting edge or the impact surface of the V-rib on an angle ⁇ of about 40 ° to 50 ° to the longitudinal axis of the flat chisel.
  • an oblique position of the transverse cutting edge or the impact surface of the V-rib is provided at an angle ⁇ of 45 ° relative to the longitudinal axis. This ensures that the transverse cutting edge or impact surface relatively easily penetrates into the material to be machined despite a strong splitting and breaking action.
  • the invention provides, the surfaces, which are considered against the direction of action of the flat chisel - in the lee of the transverse cutting edge forming surfaces or the club face to extend over the face of the flat chisel to the drill collar.
  • the impact section of the V-rib experiences optimal support.
  • the invention provides to arrange at least one V-rib on at least one of the striking surfaces of the flat chisel. Due to the number and location of the V-ribs, it is possible to specifically adapt the destructive force of the flat chisel to the material to be machined and the desired behavior of the chisel. For example, it is provided to arrange two wedge ribs running symmetrically and parallel to the longitudinal axis of the flat chisel on its striking surface. As a result, the main cutting edge is supported over its entire width in its destructive effect and it is effectively counteracted twisting of the flat chisel about its longitudinal axis, so that the desired direction is maintained at high refractive power.
  • the invention provides, the impact portion of the wedge surface by two obliquely to the main cutting edge and obliquely To form the striking surface of the flat chisel surfaces, which together form the transverse cutting edge.
  • Such a design of the impact section favors the deep penetration of the bit into the material to be machined.
  • the invention provides to form the striking portion substantially by a triangular striking surface, which is parallel to the main cutting edge with its base side and support them over two roof gable-like oriented triangular surfaces on the face of the flat chisel.
  • a wedge rib is created, which has a high debris effect through its oriented in the direction of action of the chisel club face and is slender in the support section following the impact section.
  • the invention proposes to form the striking portion substantially by a triangular striking surface, which is parallel to the main cutting edge with its base side and support it over three triangular surfaces on the face of the flat chisel, so that the V-rib looks like an upper portion a pyramid gets.
  • the material destructive and the chisel leading properties
  • the impact portion of the V-rib substantially by a rectangular impact surface, which is parallel to the main cutting edge with its base side and support it over three rectangular surfaces on the face of the flat chisel, so that the V-rib rising as one of two sides Ramp receives.
  • the V-rib also have the parallel to the longitudinal axis of the chisel side surfaces of the V-rib, especially in an obliquely penetrating into the material to be machined chisel, the material destroying and the chisel leading properties.
  • FIG. 1a shows a plan view of a flat chisel 1.
  • the flat chisel 1 consists essentially of a chisel head 2, a shaft 3 and a clamping end 4 together.
  • the chucking end 4 is designed as an SDS or SDS plus shaft.
  • FIG. 1a II is a side view on the in the Figure 1a I shown flat chisel 1 shown.
  • FIG. 1a III shows an enlarged view of the bit head 2 in plan view.
  • the chisel head 2 has a main cutting edge 5 which is transverse to a longitudinal axis of the chisel L 1 . This one goes via cutting surfaces 6a, 6b into a front striking surface 7a and a rear striking surface 7b (see also FIGS FIG. 1a IV ).
  • the cutting surfaces 6a, 6b form a main cutting edge 8 with each other. Laterally of the striking surfaces 7a and 7b, lateral striking surfaces 9a, 9b and 10a, 10b are arranged, which run towards the main cutting edge 8.
  • the striking surfaces 7a, 7b are bounded respectively by the cutting surfaces 6a and the lateral striking surfaces 9a, 9b and 10a, 10b and the chisel shaft 3. In this case, the striking surface 7a or 7a merges with the formation of a pointed surface in the cross-sectionally round chisel shaft 3.
  • the main cutting edge 5 has a width B 5 .
  • the wedge rib 11 rises steeply in the side view, similar to a four-sided pyramid of the striking surface 7a, wherein two triangular surfaces 12a, 12b together form a transverse cutting edge 13 which is transverse to the main cutting edge 8 and inclined against a direction of action x of the flat chisel 1 ,
  • the surfaces 12a, 12b together with the transverse cutting edge 13 form a striking portion 14 of the wedge rib 11.
  • the surfaces 12a, 12b may also be considered part of a tetrahedron T with a point S, the transverse cutting edge 13 connecting the striking surface 7a to the tip S and forms such a tetrahedral edge.
  • the V-rib 11 is formed by two elongated triangular surfaces 12c, 12d and extends approximately to the chisel shaft 3.
  • formed by the surfaces 12c, 12d ridge 16 extends in the direction of the transverse cutting edge 13 approximately parallel the longitudinal axis L 1 of the flat chisel 1 (see also FIG. 2 ).
  • the V-rib 11 extends in plan view over a length L 11 , wherein the length L 11 of a length L 14 of the impact portion 14 and a length L 15 of the support portion 15 composed.
  • the impact portion 14 and the support portion 15 are approximately in an aspect ratio of 1: 9.
  • FIG. 1a IV is a side view on the in the FIG. 1a III shown flat chisel 1 shown from an arrow direction 1a IV .
  • Apart from the V-rib 11 of the flat chisel 1 is mirror-symmetrical to a plane extending perpendicularly in the plane E 1 .
  • FIG 1a V is a frontal view of the in the 1a 1a I to IV Flat chisel 1 shown from an arrow direction 1a V shown. From the front view, the effective length L in the impact direction 13W of the transverse cutting edge 13 can be removed, with which this acts in the direction of action of the flat chisel x 1 to the material to be processed.
  • a width B 11 of the V-rib 11 corresponds approximately to the effective length of the transverse cutting edge 13
  • FIGS. 1b I to 1b III show in analogy to the Figures 1a III to 1a V a second flat chisel 1, in which on the striking surfaces 7a and 7b centrally each have a V-rib 11 is arranged.
  • FIGS. 2a I to 2a III show in analogy to the Figures 1a III to 1a V a third flat chisel 1, in which two wedge ribs 11 are arranged symmetrically to a longitudinal axis L 1 on a striking surface 7a.
  • FIGS. 2b I to III 2b show in analogy to the Figures 2a I to 2a III a fourth flat chisel 1, in which on striking surfaces 7a, 7b symmetrical to a longitudinal axis L 1st two wedge ribs 11 are arranged in each case.
  • the 3a I to III 3a show in analogy to the Figures 1a III to 1a V a fifth flat chisel 1, in which three wedge ribs 11 are arranged symmetrically to a longitudinal axis L 1 on a striking surface 7 a.
  • FIGS. 3b I to 3b III show in analogy to the 3a I to III 3a a sixth flat chisel 1, in which three wedge ribs 11 are arranged on striking surfaces 7a, 7b symmetrically to a longitudinal axis L 1 .
  • FIGS. 4 I to 4 III show in analogy to the Figures 2a I to 2a III a seventh flat chisel 1, in which two wedge ribs 17 are arranged symmetrically to a longitudinal axis L 1 on a striking surface 7a.
  • Known V-ribs have the V-ribs 17 in a striking section 14 no cross-cutting edge, but each a triangular face 18, which according to the transverse cutting edge of Figures 1a to 3b III I is inclined towards the longitudinal axis L 1 .
  • the V-rib 17 with two further triangular-shaped surfaces 19a, 19b runs out into the striking surface 7a in the same way as a saddle roof.
  • a ridge 20, which form the two surfaces 19a, 19b with each other is formed flat. The ridge 20 runs counter to a direction of action x with a slight inclination of about 1 ° to 3 ° to the longitudinal axis L 1 .
  • FIGS. 5 I to 5 III show in analogy to the Figures 2a I to 2a III an eighth flat chisel 1, in which on a striking surface 7a symmetrically to a longitudinal axis L 1 two V-ribs 21 are arranged.
  • Known V-ribs have the V-ribs 21 in a striking section 14 no cross-cutting edge, but each a triangular Hitting surface 22, which according to the transverse cutting edge of Figures 1a to 3b III I is inclined towards the longitudinal axis L 1 .
  • the V-rib 21 extends with three further triangular-shaped surfaces 23a, 23b, 23c into the striking surface 7a.
  • the triangular surface 23b runs counter to a direction of action x with a slight inclination of about 1 ° to 3 ° to the longitudinal axis L 1 and passes into the striking surface 7a.
  • the V-rib 21 can also be described as a four-sided pyramid point, in which the side surface 22 is aligned with a base side G 22 parallel to a main cutting edge 8.
  • FIGS. 6 I to 6 III show in analogy to the Figures 2a I to 2a III a ninth flat chisel 1, in which two wedge ribs 24 are arranged symmetrically to a longitudinal axis L 1 on a striking surface 7a.
  • Known V-ribs have the V-ribs 24 in a striking section 14 no cross-cutting edge, but each have a rectangular face 25, which according to the transverse cutting edge of Figures 1a to 3b III I is inclined towards the longitudinal axis L 1 .
  • the V-rib 24 extends over three further rectangular surfaces 26, 27 a, 27 b in the striking surface 7 a.
  • the impact surface 25 is extended by the top surface 26 and the V-rib 24 laterally bounded by the side surfaces 27a, 27b.
  • the top surface 26 runs counter to a direction of action x with a slight inclination of about 1 ° to 3 ° to the longitudinal axis L 1 and passes into the striking surface 7a.
  • the V-rib 21 can also be described as a ramp or jump.
  • the V-ribs on the respective flat chisel are identical and arranged symmetrically to the longitudinal axis of the flat chisel. According to further embodiments not shown, it is provided that the V-ribs on the respective flat chisel form differently and / or asymmetrically arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Saccharide Compounds (AREA)

Claims (12)

  1. Ciseau plat (1), notamment burin pour un perforateur et/ou un burineur entraîné par un moteur pour travailler des matériaux, comportant une tête de ciseau (2) en forme de pelle, ayant une arête principale (5) dirigée transversalement à l'axe longitudinal (L1) du ciseau et une surface de frappe avant et une surface de frappe arrière, pratiquement planes (7a ; 7b),
    et au moins l'une des surfaces de frappe (7a ; 7b) comporte au moins une nervure (11) réalisée sous la forme d'une nervure en dièdre,
    caractérisé en ce que
    la nervure (11) réalisée sous la forme d'une nervure à section en dièdre (11 ; 17 ; 21 ; 24) présente en vue de côté, et selon l'axe longitudinal (L1), un premier segment de frappe (14) court, de forte pente et un segment d'appui (15) descendant à plat, d'une longueur supérieure à celle du premier segment de frappe (14), le segment de frappe (14) étant aligné par rapport à l'arête principale (5) et le segment d'appui (15) étant aligné par rapport à la tige (3) du ciseau.
  2. Ciseau plat selon la revendication 1,
    caractérisé en ce que
    la nervure en forme de dièdre (11) présente en vue de face sur l'arête principale (5) du ciseau plat (11), une pente raide en forme de tétraèdre avec une arête de coupe transversale (13), du côté frontal, et une zone suivante (15) qui suit le sommet (S) du tétraèdre (T) et s'étend en direction de la tige de ciseau (3) suivant une forme V et se termine à plat sensiblement parallèlement à l'axe.
  3. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    la nervure en forme de dièdre (11) présente une arête de tétraèdre (11) réalisée sous la forme d'arête de coupe transversale (11), avant, comme face frontale, et un angle de pente abrupte α ≈ 40°-50° et notamment α ≈ 45°
  4. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    la nervure en forme de dièdre (17, 21, 24) présente une surface de frappe avant (18, 22, 25) avec un angle de pente raide α ≈ 40-50 et notamment α ≈ 45°
  5. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    le pied (15 ou 12c, 12d, 19a, 19b ; 23a, 23b, 23c ; 26, 27a, 27b) de la nervure en forme de dièdre (11 ; 17 ; 21 ; 24) s'étend sensiblement sur toute la longueur de la surface inclinée (7a, 7b).
  6. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    seulement une surface de frappe (7a, 7b) comporte au moins une nervure en forme de dièdre (11 ; 17 ; 21 ; 24).
  7. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    les deux surfaces de frappe (7a, 7b) comportent au moins une nervure en forme de dièdre (11 ; 17 ; 21 ; 24).
  8. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    les nervures en forme de dièdre (11 ; 17 ; 21 ; 24) sont symétriques par rapport à leur axe longitudinal.
  9. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    la nervure en forme de dièdre (11) comporte une arête de coupe transversale (13) formée par des surfaces (12a, 12b) disposées en biais par rapport à l'arête principale (8) ou en biais par rapport aux surfaces de frappe (7a, 7b).
  10. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    en vue de face sur l'arête principale (5) du ciseau plat (1), la nervure en forme de dièdre (17) présente une montée accentuée avec une surface en forme de rampe (18), cette surface en forme de rampe (18) étant triangulaire et, dans le segment d'appui (15), elle rejoint la surface de frappe (7a, 7b) suivant une forme de toit à deux versants avec des surfaces de forme triangulaire (19a, 19b).
  11. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    la nervure en forme de dièdre (21) présente en vue de face sur l'arête principale (5) du ciseau plat (1), une montée accentuée en forme de rampe avec une surface de rampe (22), la surface de rampe (22) ayant une forme triangulaire et, dans le segment d'appui (15), elle rejoint selon une forme de pyramide, les surfaces triangulaires (23a, 23b, 23c) dans la surface de frappe (7a, 7b).
  12. Ciseau plat selon l'une des revendications précédentes,
    caractérisé en ce que
    la nervure en forme de dièdre (24) présente en vue de face sur l'arête principale (5) du ciseau plat (1), une montée accentuée en forme de rampe avec une surface de rampe (25),
    et cette surface en forme de rampe (25) est de forme rectangulaire et dans le segment d'appui (15), elle rejoint une autre surface en forme de rampe (26), de forme rectangulaire, dans la surface de frappe (7a, 7b), la nervure en forme de dièdre (24) étant délimitée latéralement par des surfaces de forme triangulaire (27a, 27b).
EP04008401A 2003-04-17 2004-04-07 Burin plat Expired - Lifetime EP1468790B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10318091A DE10318091A1 (de) 2003-04-17 2003-04-17 Flachmeißel
DE10318091 2003-04-17

Publications (2)

Publication Number Publication Date
EP1468790A1 EP1468790A1 (fr) 2004-10-20
EP1468790B1 true EP1468790B1 (fr) 2008-10-01

Family

ID=32892444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008401A Expired - Lifetime EP1468790B1 (fr) 2003-04-17 2004-04-07 Burin plat

Country Status (4)

Country Link
EP (1) EP1468790B1 (fr)
AT (1) ATE409553T1 (fr)
DE (2) DE10318091A1 (fr)
ES (1) ES2310692T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0718758D0 (en) 2007-09-26 2007-11-07 Burn Steve Drill bit
EP3281748A1 (fr) * 2016-08-08 2018-02-14 HILTI Aktiengesellschaft Burin
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
USD922840S1 (en) 2019-05-06 2021-06-22 Milwaukee Electric Tool Corporation Chisel
CN115060565B (zh) * 2022-08-16 2022-11-01 昆明理工大学 一种用于预裂爆破模型试验的检测设备及方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB169885A (en) * 1920-08-18 1921-10-13 William Thomas Routh Improvements in cold chisels
GB468999A (en) * 1936-11-10 1937-07-16 John Cecil Robinson Improvements relating to percussive picks
DE884929C (de) * 1941-10-01 1953-07-30 Eduard Wille Meissel, insbesondere Durchhaertemeissel
DE8320045U1 (de) * 1983-07-12 1983-11-17 Wengeler & Kalthoff Hammerwerke GmbH & Co KG, 4320 Hattingen Stahlspaten fuer schlaghaemmer
CH670418A5 (fr) * 1986-03-24 1989-06-15 Zepf Hans Rudolf
DE9104564U1 (fr) * 1991-04-15 1991-06-06 Keramchemie Gmbh, 5433 Siershahn, De
IT239729Y1 (it) * 1996-04-26 2001-03-13 Giovanni Battista Andrina Utensili per martelli demolitori con profilo speciale.
EP1230071A1 (fr) * 1999-11-17 2002-08-14 Hawera Probst GmbH Trepan

Also Published As

Publication number Publication date
ATE409553T1 (de) 2008-10-15
DE502004008132D1 (de) 2008-11-13
ES2310692T3 (es) 2009-01-16
DE10318091A1 (de) 2004-11-18
EP1468790A1 (fr) 2004-10-20

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