EP0339412A2 - Foret à roche - Google Patents

Foret à roche Download PDF

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Publication number
EP0339412A2
EP0339412A2 EP89106791A EP89106791A EP0339412A2 EP 0339412 A2 EP0339412 A2 EP 0339412A2 EP 89106791 A EP89106791 A EP 89106791A EP 89106791 A EP89106791 A EP 89106791A EP 0339412 A2 EP0339412 A2 EP 0339412A2
Authority
EP
European Patent Office
Prior art keywords
conveyor
helix
conveying
sections
rock drill
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.)
Granted
Application number
EP89106791A
Other languages
German (de)
English (en)
Other versions
EP0339412B1 (fr
EP0339412A3 (en
Inventor
Bernhard Moser
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.)
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst 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 Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG, Hawera Probst GmbH filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of EP0339412A2 publication Critical patent/EP0339412A2/fr
Publication of EP0339412A3 publication Critical patent/EP0339412A3/de
Application granted granted Critical
Publication of EP0339412B1 publication Critical patent/EP0339412B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
    • Y10T408/9097—Spiral channel

Definitions

  • the invention relates to a rock drill for rotating and / or striking stress, in particular for impact or hammer drilling machines according to the preamble of claim 1.
  • the invention has for its object to provide a drilling tool, in particular a rock drill for use in impact or hammer drills, in which the feed helix can be easily manufactured due to its design and which delivers improved results in its conveying performance compared to conventionally designed drilling tools.
  • the rock drill according to the invention is based on the knowledge that it is not necessary for a satisfactory drilling dust extraction to design the complete conveying helix in a step-like or step-like manner with conveying sections which are flatter in the slope. Rather, it is sufficient if the drilling dust is loosened from time to time by a stronger axial impact component along its path over the feed spiral, so that caking of the drilling dust and thus a tendency to clog are avoided.
  • the invention proposes that the conveyor helix consist of alternating horizontal conveyor sections with a 0 ° slope and slope sections, the sections each comprising a 90 ° rotation angle.
  • a first horizontal conveyor section is followed by a first rising conveyor section, followed by a second horizontal conveyor section and this in turn by a second rising conveyor section connects.
  • a rotation angle of 360 ° two horizontal and two rising conveyor sections are therefore provided with a pitch of the helix.
  • the horizontal conveyor sections serve the loosening due to an axial acceleration and the rising conveyor sections serve the drilling dust itself.
  • the conveyor helix has no undercuts in a side view of the horizontal conveyor sections.
  • the two-part forging tool is designed as a stamp-shaped tool and the forging process can be carried out without rotating the conveyor helix. This is preferably achieved when the surface tangents of the horizontal conveyor section run perpendicular to the vertical plane through the horizontal conveyor section, i. H. if there are no undercuts in this conveyor section. This results in an extremely cost-effective manufacturing process even for heavy and massive drilling tools for use in heavier hammer drilling machines.
  • the formation of the rock drill according to the invention with a double-start is particularly advantageous Conveyor helix, the opposite horizontal conveyor sections being formed by horizontal ring segments.
  • the ring segments themselves serve to guide the drilling tool well in the borehole, since the ring segments ensure optimal lateral support over the entire drilling length.
  • the ring segments are broken through by the inclined flanks of the rising conveyor sections.
  • the invention can also be implemented as a catchy conveyor spiral.
  • a two-start feed helix is advantageous because of the double drilling material outlet on the drill head.
  • the rock drill according to the invention is therefore equipped in an advantageous embodiment as a breakthrough drill with a double-start feed helix with a correspondingly designed drill head. Since such a drill head itself is generally circular-cylindrical with a centering tip attached and carbide cutting elements arranged on the side, this drill head is connected to the double-start feed helix via two semicircular incisions.
  • the rising conveyor sections can additionally be provided with stair-shaped flanks as described in the patent referred to in the introduction.
  • the rock drill 1 shown in FIG. 1 is designed as a breakthrough drill with a correspondingly designed drill head 2 with centering tip 3 and hard metal cutting elements 4.
  • the two-start feed helix 5 is connected to the drill head 2 via a semicircular incision 6 as a drilling dust groove. In the lower area of the helix 5, the drill shaft 7 is connected.
  • the conveyor helix 5 consists of alternating horizontal conveyor sections 8, 8 'with a 0 ° slope and conveyor sections 9, 9' formed as an increasing conveyor sections are, with individual conveyor sections adjoining each other at an angle of rotation of 90 °.
  • the first coil has the conveyor sections 8, 9 and the second conveyor coil has the conveyor sections 8 ', 9'.
  • Each revolving conveyor helix therefore has two horizontally within a pitch h running conveyor sections 8 and 8 'and two intermediate rising conveyor sections 9 and 9' on.
  • the feed spiral of the drill according to the invention is also characterized in that the feed spiral has no undercuts in the horizontal feed sections 8.
  • the first vertical plane 11 running parallel to the blade plane and through the longitudinal axis 10 of the drill in FIG. 2 or a second vertical plane 12 perpendicular to this and also running through the longitudinal axis 10 of the drill is used.
  • the first vertical plane 11 is perpendicular to the plane of the page in FIG. 3, passes through the longitudinal axis 10 of the drill and halves the horizontal conveying section 8, 8 '.
  • These two vertical planes 11, 12 are also shown schematically in FIG. 1.
  • Each horizontal conveying section 8 or 8 ' is halved by the first vertical plane 11 (see FIG. 3) and each surface tangent in the drilling dust groove of the horizontal conveying section 8 or 8' is perpendicular to the first vertical plane 11 or parallel to the second vertical plane 12. 2, the horizontal conveyor sections 8, 8 'can therefore be manufactured with a two-part forging tool which runs perpendicular to the sheet plane. This follows from the fact that the horizontal conveyor section 8, 8 'including the arcuate transitions 13 between the individual conveyor sections 8, 8' have no undercuts.
  • the rising conveyor sections 9 and 9 ' may have a stair-shaped course 15 in a preferred embodiment, as mentioned in the patent described in the introduction.
  • the loosening of the drilling dust is effected by a vertical impact component on the rising conveyor section in addition to the horizontal conveyor section.
  • FIG. 4 The operation of the rock drill according to the invention is shown schematically in FIG. 4:
  • the drilling dust generated in the borehole reaches the first horizontal production section 8 or 8 'via the two incisions 6 and 6' via the first rising production section 9 (9 'hidden in Fig. 1).
  • this horizontal conveying section 8, 8 ' as shown in Fig. 4 as a vertical line 16, during a rotation angle of 90 ° no promotion but only a loosening of the drilling dust by the vertical Impact movements of the drill.
  • This axial conveying process is identified in FIG. 4 by reference number 17.
  • the rising conveying section 9, 9 'again follows a horizontal conveying section 8, 8' with a 0 ° slope to loosen the drilling dust over a transport angle of 90 °.
  • the schematic course shown in FIG. 4 over the conveyor sections 8, 9 is accordingly followed over a pitch or pitch h.
  • the gradient height h is shown in FIG. 4 enlarged compared to the representation in FIGS. 1 to 3.
  • the angles of 90 ° shown in FIG. 4 relate to a rotary movement or a transport movement of the drilling dust along the conveying sections by an angle of rotation of 90 °.
  • the invention is not restricted to the exemplary embodiment described and illustrated. Rather, it also encompasses all professional developments and refinements without their own inventive content.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP89106791A 1988-04-23 1989-04-15 Foret à roche Expired - Lifetime EP0339412B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813849 1988-04-23
DE3813849A DE3813849A1 (de) 1988-04-23 1988-04-23 Gesteinsbohrer

Publications (3)

Publication Number Publication Date
EP0339412A2 true EP0339412A2 (fr) 1989-11-02
EP0339412A3 EP0339412A3 (en) 1990-01-31
EP0339412B1 EP0339412B1 (fr) 1992-04-08

Family

ID=6352792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106791A Expired - Lifetime EP0339412B1 (fr) 1988-04-23 1989-04-15 Foret à roche

Country Status (3)

Country Link
US (1) US4924953A (fr)
EP (1) EP0339412B1 (fr)
DE (2) DE3813849A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138871A1 (fr) 2000-03-27 2001-10-04 HILTI Aktiengesellschaft Foret hélicoidal
CZ297118B6 (cs) * 2000-05-05 2006-09-13 Diager Derovací vrták
DE10053343B4 (de) * 2000-10-27 2009-04-16 Hilti Aktiengesellschaft Wendelbohrer

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236553A1 (de) * 1992-10-29 1994-05-05 Hawera Probst Kg Hartmetall Gesteinsbohrer
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
TW299385B (en) 1994-12-12 1997-03-01 Black & Decker Inc Cutting tools for drilling concrete, aggregate, masonry or the like materials
GB2303810A (en) * 1995-07-29 1997-03-05 Black & Decker Inc Masonry drill bit
GB2303809A (en) * 1995-07-29 1997-03-05 Black & Decker Inc Roll-forged drill bit
US6250403B1 (en) 1997-09-30 2001-06-26 The Charles Machine Works, Inc. Device and method for enlarging a Bore

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB518747A (en) * 1938-08-31 1940-03-06 Charles Crofton And Company En Improvements relating to rock boring bits
US2322894A (en) * 1939-06-29 1943-06-29 Rustless Iron & Steel Corp Twist drill
US3190377A (en) * 1960-03-30 1965-06-22 Central Mine Equipment Company Earth boring equipment for core recovery
DE2041985B1 (de) * 1970-08-25 1971-06-24 Werkzeugbau Gmbh Gesteinsbohrer
DE2059232B1 (de) * 1970-12-02 1972-03-09 Werkzeugbau Gmbh Gesteinsbohrer
NL7401084A (fr) * 1973-01-27 1974-07-30
AT376765B (de) * 1978-05-16 1984-12-27 Guergen Karlheinz Auswechselbare bohrkrone fuer einen bei allen gesteinsarten anwendbaren gesteindrehschlagbohrer und bohrhammer
DD147785A3 (de) * 1979-06-15 1981-04-22 Wolfgang Hoeppner Bohrschnecke zum entnehmen von bohrproben
DE3014693A1 (de) * 1980-04-16 1981-10-22 Hilti AG, 9494 Schaan Gesteinsbohrer
DE3044775A1 (de) * 1980-11-27 1982-07-08 Hilti AG, 9494 Schaan Gesteinsbohrer
DE3317989A1 (de) * 1983-05-18 1984-11-22 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrwerkzeug
DE3517560A1 (de) * 1985-05-15 1986-11-20 Hawera Probst Gmbh + Co, 7980 Ravensburg Austausch-foerderwendel fuer gesteinsbohrer
DE3830972A1 (de) * 1987-09-10 1989-03-23 Michael Hartfuss Fa Drehbohrwerkzeug

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138871A1 (fr) 2000-03-27 2001-10-04 HILTI Aktiengesellschaft Foret hélicoidal
CZ297118B6 (cs) * 2000-05-05 2006-09-13 Diager Derovací vrták
DE10053343B4 (de) * 2000-10-27 2009-04-16 Hilti Aktiengesellschaft Wendelbohrer

Also Published As

Publication number Publication date
DE3813849A1 (de) 1989-11-02
EP0339412B1 (fr) 1992-04-08
US4924953A (en) 1990-05-15
DE58901108D1 (de) 1992-05-14
EP0339412A3 (en) 1990-01-31

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