EP0516581A2 - Outil de forage et de burinage avec corps de base et élément de coupe - Google Patents

Outil de forage et de burinage avec corps de base et élément de coupe Download PDF

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Publication number
EP0516581A2
EP0516581A2 EP92810283A EP92810283A EP0516581A2 EP 0516581 A2 EP0516581 A2 EP 0516581A2 EP 92810283 A EP92810283 A EP 92810283A EP 92810283 A EP92810283 A EP 92810283A EP 0516581 A2 EP0516581 A2 EP 0516581A2
Authority
EP
European Patent Office
Prior art keywords
recess
base body
main axis
tool according
tool
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
EP92810283A
Other languages
German (de)
English (en)
Other versions
EP0516581A3 (en
EP0516581B1 (fr
Inventor
Maximilian Stöck
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 EP0516581A2 publication Critical patent/EP0516581A2/fr
Publication of EP0516581A3 publication Critical patent/EP0516581A3/de
Application granted granted Critical
Publication of EP0516581B1 publication Critical patent/EP0516581B1/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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts
    • 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

Definitions

  • the invention relates to a drilling and chiseling tool with a base body made of steel and a cutting body made of hard metal in a recess of the base body, the recess being open towards the machining end of the tool and extending parallel to the main axis of the tool and passing through the cross section formed normal to the main axis Has side walls.
  • Drilling and chisel tools of the type mentioned have been widespread for many years and have accordingly proven themselves in use.
  • problems arise due to the extremely different material properties between the steel used as the base body and the hard metal used as the cutting body. These problems can arise on the one hand during production and on the other hand only when using the tools.
  • the problems that arise during production include, for example, the thermal stresses which are caused by the different thermal expansion coefficients of the materials used.
  • the invention has for its object to provide a drilling and chiseling tool, in which overstressing of the individual parts occurring in use is avoided, so that the service life of the tool is increased overall.
  • the object is achieved in that a solder seam is provided for connecting the cutting body to the base body in the region of the side walls, which has a substantially uniform distribution of the shear stress over the length extending parallel to the main axis.
  • the measure according to the invention on a drilling and chiseling tool reduces shear stress peaks in the region of the longitudinal ends of the recess. This results in a uniform distribution of the shear stresses in the solder seam creating the connection between the base body and the cutting body over the length extending parallel to the main axis. Overloads, which lead to the destruction of the solder seam and the adjacent areas of the base body and the cutting body, are avoided in this way.
  • the solder seam is preferably of different thickness over the length extending parallel to the main axis.
  • the variation of the thickness is expediently designed such that it increases towards both longitudinal ends.
  • the solder seam is therefore thicker in those areas where the highest shear stresses occur. As a result, in there is more material available for solder in those areas, so that these areas are able to better balance the shear stresses and thus reduce peaks.
  • solder seam with different thicknesses can be achieved in various ways. On the one hand, this can be done by a corresponding shape of the cutting body, so that its longitudinal extension is slightly convex. On the other hand, in an analogous manner, the recess can have a corresponding shape, which leads to a slightly convex design of the side walls in the longitudinal direction. A combination of these two measures is of course also possible.
  • the relief notches can be designed, for example, as bores which penetrate the base body in the region of the longitudinal end of the recess facing away from the machining end of the tool. Such bores impart a certain flexibility to the base body in the bottom region of the recess. Shear stress peaks can thus be reduced and, above all, any solder seam that may be present in the bottom region of the recess is relieved in such a way that breaks no longer occur here.
  • the relief notches As open grooves. These grooves preferably run parallel to the cutting body over the entire front cross-section of the tool. Applying the knowledge that the more shear stress peaks are reduced, the greater the ratio between the thickness of the cutting body and the thickness of the area surrounding the cutting body of the base body, the wall thickness of the base body remaining between the recess and the grooves is preferably 0.1 to 0 , 8 times the width of the recess. In this area of the recess, too, a resilience of the base body which serves to reduce the shear stress peaks is achieved.
  • Fig. 1 shows the machining end of a drilling and Chisel tool with base body 1 and cutting body 2.
  • the base body 1 For receiving the cutting body 2, the base body 1 has a recess 3.
  • the solder seam 4 is located between the recess 3 and the cutting body 2.
  • the solder seam 4 has a different thickness along the length running parallel to the main axis in such a way that the thickness is greatest at the two longitudinal ends.
  • the different thickness of the solder seam 4 comes about in the example shown in that the side walls of the recess 3 are slightly convex.
  • FIG. 2 shows a machining end of a drilling and chiseling tool which has a base body 5 with a recess 7, a cutting body 6 being arranged in the recess 7. There is a solder seam 8 between the cutting body 6 and the recess 7.
  • the base body 5 is penetrated by bores 9, which have the function of relief notches.
  • FIG. 3 again shows a machining end of another drilling and chiseling tool with a base body 10 and a cutting body 11 within a recess 12.
  • a solder seam 13 is arranged between the cutting body 11 and the recess 12.
  • a cutout 14, which penetrates the base body 10 is provided next to the recess 12 opposite the machining end. Because of this recess 14, the solder seam 13 is interrupted at the base of the recess 12.
  • the machining end of a drilling and chiseling tool that can be seen in FIG. 4 has a base body 15 with a recess 17 and a cutting body 16 arranged therein. There is an emergency seam 18 between the cutting body 16 and the recess 17.
  • the base body 15 has grooves 19 in the region of the machining end, which pass through the basic body 15 and are open towards the machining end are.
  • the wall thickness w remaining between the recess 17 and the grooves 19 is less than the width b of the recess 17, ie the wall thickness w is 0.1 to 0.8 times the width b of the recess 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
EP92810283A 1991-05-02 1992-04-16 Outil de forage et de burinage avec corps de base et élément de coupe Expired - Lifetime EP0516581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114271 1991-05-02
DE4114271A DE4114271A1 (de) 1991-05-02 1991-05-02 Bohr- und meisselwerkzeug mit grundkoerper und schneidkoerper

Publications (3)

Publication Number Publication Date
EP0516581A2 true EP0516581A2 (fr) 1992-12-02
EP0516581A3 EP0516581A3 (en) 1993-07-07
EP0516581B1 EP0516581B1 (fr) 1998-07-15

Family

ID=6430780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810283A Expired - Lifetime EP0516581B1 (fr) 1991-05-02 1992-04-16 Outil de forage et de burinage avec corps de base et élément de coupe

Country Status (5)

Country Link
US (1) US5265989A (fr)
EP (1) EP0516581B1 (fr)
JP (1) JP3426614B2 (fr)
DE (2) DE4114271A1 (fr)
DK (1) DK0516581T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013108233A1 (de) * 2013-07-31 2015-02-05 Drebo Werkzeugfabrik Gmbh Bohrer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442266A1 (de) * 1994-11-28 1996-05-30 Hilti Ag Werkzeug mit Trägerkörper und Schneidkörper
TW299385B (en) 1994-12-12 1997-03-01 Black & Decker Inc Cutting tools for drilling concrete, aggregate, masonry or the like materials
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
SE507542C2 (sv) * 1996-12-04 1998-06-22 Seco Tools Ab Fräsverktyg samt skärdel till verktyget
US6250404B1 (en) 1999-06-08 2001-06-26 The Charles Machine Works, Inc. Directional boring head

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101376A (en) * 1934-10-09 1937-12-07 Wallramit Handel Mij Nv Percussive boring tool
DE671959C (de) * 1937-08-25 1939-02-17 Meutsch Voigtlaender & Co Vorm Mit Hartmetallschneiden versehenes Werkzeug, insbesondere Gesteinsschlagbohrer
CH272188A (de) * 1948-01-14 1950-12-15 Sandvikens Jernverks Ab Stossbohrkrone mit mindestens zwei Hartmetallschneideinsätzen.
FR981182A (fr) * 1948-02-28 1951-05-23 Sandvikens Jernverks Ab Couronne de trépan pour forage à percussion
FR1006219A (fr) * 1947-12-05 1952-04-21 Taillant de mine à plaquette extra-dure
US2628072A (en) * 1949-09-01 1953-02-10 Timken Roller Bearing Co Drill bit having groove with hard metal cutter insert brazed therein
DE765003C (de) * 1941-10-19 1953-10-26 Hartmetallwerkzeugfabrik Meuts Werkzeug mit Hartmetallein- bzw. -auflagen
FR1051105A (fr) * 1951-03-01 1954-01-13 Skf Svenska Kullagerfab Ab Perforatrice pour la roche avec pointe en métal dur
US2784943A (en) * 1952-11-03 1957-03-12 Sandvikens Jernverks Ab Rock drill bit with cutting insert
CH357692A (fr) * 1959-10-13 1961-10-31 Dionisotti Joseph Outil de perforation de roches
FR1414023A (fr) * 1964-09-03 1965-10-15 Forges & Ateliers Du Saut Du T Outil constitué par un support et des plaquettes rapportées maintenues élastiquement dans ledit support
DE2802119A1 (de) * 1977-01-20 1978-08-03 Boart Int Ltd Loeteinsatz und verfahren zu seiner anbringung
US4181187A (en) * 1977-03-03 1980-01-01 Sandvik Aktiebolag Rock drill bit with stress relief insert sockets
DE3426977A1 (de) * 1984-07-21 1986-01-30 Hawera Probst Gmbh + Co, 7980 Ravensburg Gesteinsbohrer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA631619A (en) * 1961-11-28 B. Baker John Rock drill bit with inserts
US2614813A (en) * 1949-07-08 1952-10-21 Ingersoll Rand Co Rock drilling tool
GB707021A (en) * 1951-03-01 1954-04-07 Skf Svenska Kullagerfab Ab Improvements relating to rock drills

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101376A (en) * 1934-10-09 1937-12-07 Wallramit Handel Mij Nv Percussive boring tool
DE671959C (de) * 1937-08-25 1939-02-17 Meutsch Voigtlaender & Co Vorm Mit Hartmetallschneiden versehenes Werkzeug, insbesondere Gesteinsschlagbohrer
DE765003C (de) * 1941-10-19 1953-10-26 Hartmetallwerkzeugfabrik Meuts Werkzeug mit Hartmetallein- bzw. -auflagen
FR1006219A (fr) * 1947-12-05 1952-04-21 Taillant de mine à plaquette extra-dure
CH272188A (de) * 1948-01-14 1950-12-15 Sandvikens Jernverks Ab Stossbohrkrone mit mindestens zwei Hartmetallschneideinsätzen.
FR981182A (fr) * 1948-02-28 1951-05-23 Sandvikens Jernverks Ab Couronne de trépan pour forage à percussion
US2628072A (en) * 1949-09-01 1953-02-10 Timken Roller Bearing Co Drill bit having groove with hard metal cutter insert brazed therein
FR1051105A (fr) * 1951-03-01 1954-01-13 Skf Svenska Kullagerfab Ab Perforatrice pour la roche avec pointe en métal dur
US2784943A (en) * 1952-11-03 1957-03-12 Sandvikens Jernverks Ab Rock drill bit with cutting insert
CH357692A (fr) * 1959-10-13 1961-10-31 Dionisotti Joseph Outil de perforation de roches
FR1414023A (fr) * 1964-09-03 1965-10-15 Forges & Ateliers Du Saut Du T Outil constitué par un support et des plaquettes rapportées maintenues élastiquement dans ledit support
DE2802119A1 (de) * 1977-01-20 1978-08-03 Boart Int Ltd Loeteinsatz und verfahren zu seiner anbringung
US4181187A (en) * 1977-03-03 1980-01-01 Sandvik Aktiebolag Rock drill bit with stress relief insert sockets
DE3426977A1 (de) * 1984-07-21 1986-01-30 Hawera Probst Gmbh + Co, 7980 Ravensburg Gesteinsbohrer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013108233A1 (de) * 2013-07-31 2015-02-05 Drebo Werkzeugfabrik Gmbh Bohrer

Also Published As

Publication number Publication date
DK0516581T3 (da) 1999-04-19
EP0516581A3 (en) 1993-07-07
JPH05124027A (ja) 1993-05-21
EP0516581B1 (fr) 1998-07-15
DE59209416D1 (de) 1998-08-20
JP3426614B2 (ja) 2003-07-14
DE4114271A1 (de) 1992-11-05
US5265989A (en) 1993-11-30

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