EP0778390A3 - Rotary percussive twist drill - Google Patents

Rotary percussive twist drill Download PDF

Info

Publication number
EP0778390A3
EP0778390A3 EP96810629A EP96810629A EP0778390A3 EP 0778390 A3 EP0778390 A3 EP 0778390A3 EP 96810629 A EP96810629 A EP 96810629A EP 96810629 A EP96810629 A EP 96810629A EP 0778390 A3 EP0778390 A3 EP 0778390A3
Authority
EP
European Patent Office
Prior art keywords
shaft
twist drill
jacket
pin
longitudinal axis
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
EP96810629A
Other languages
German (de)
French (fr)
Other versions
EP0778390B1 (en
EP0778390A2 (en
Inventor
Werner Kleine
Werner Bongers
Axel Neukirchen
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 EP0778390A2 publication Critical patent/EP0778390A2/en
Publication of EP0778390A3 publication Critical patent/EP0778390A3/en
Application granted granted Critical
Publication of EP0778390B1 publication Critical patent/EP0778390B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

Ein Drehschlag-Wendelbohrer besitzt einen Schaft (1), der wenigstens eine, spiralförmig in seinem Mantel verlaufende Hauptabfuhmut (4) für Bohrklein aufweist. An seinem einen Schaftende (10) ist eine Schneidplatte (6) mit Hartmetallschneiden (7) vorgesehen, welche die Stimfläche (3) des Schaftendes (10) axial und den Mantel (2) des Schaftes (1) radial überragt. Im Bereich des Schaftendes (10) ist wenigstens ein stiftförmiges Führungselement (11) in den Schaft (11) eingebettet, wobei seine Längsachse im wesentlichen senkrecht zur Längsachse (A) des Schaftes (1) verläuft. Die freie Stimfläche (12) des stiftförmigen Führungselementes (11) weist gegenüber dem Mantel (2) des Schaftes (1) einen Überstand auf, der kleiner ist als der radiale Überstand der Schneidplatte (6).

Figure 00000001
A rotary impact twist drill has a shank (1) which has at least one main output (4) for drilling cuttings, which runs spirally in its jacket. At one end of the shaft (10) there is a cutting plate (6) with hard metal cutting edges (7), which axially projects beyond the end face (3) of the shaft end (10) and radially over the jacket (2) of the shaft (1). At least one pin-shaped guide element (11) is embedded in the shaft (11) in the region of the shaft end (10), its longitudinal axis running essentially perpendicular to the longitudinal axis (A) of the shaft (1). The free end face (12) of the pin-shaped guide element (11) has an overhang relative to the casing (2) of the shaft (1) which is smaller than the radial overhang of the cutting plate (6).
Figure 00000001
EP96810629A 1995-12-07 1996-09-25 Rotary percussive twist drill Expired - Lifetime EP0778390B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545646A DE19545646A1 (en) 1995-12-07 1995-12-07 Rotary impact twist drill
DE19545646 1995-12-07

Publications (3)

Publication Number Publication Date
EP0778390A2 EP0778390A2 (en) 1997-06-11
EP0778390A3 true EP0778390A3 (en) 1998-07-01
EP0778390B1 EP0778390B1 (en) 2003-10-01

Family

ID=7779437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810629A Expired - Lifetime EP0778390B1 (en) 1995-12-07 1996-09-25 Rotary percussive twist drill

Country Status (6)

Country Link
US (1) US5836408A (en)
EP (1) EP0778390B1 (en)
JP (1) JP3907756B2 (en)
CN (1) CN1079045C (en)
DE (2) DE19545646A1 (en)
DK (1) DK0778390T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004016087A1 (en) * 2004-04-01 2005-10-20 Hilti Ag drilling
SE533277C2 (en) * 2008-12-19 2010-08-10 Sandvik Intellectual Property Drill body and support strip for this
EP2682211A1 (en) * 2011-02-28 2014-01-08 Tungaloy Corporation Guide pad, cutting tool body, and cutting tool
EP2682212B1 (en) * 2011-02-28 2020-10-07 Tungaloy Corporation Guide pad and cutting tool
CN102635309B (en) * 2012-04-19 2017-10-17 平阳县鹏伟机械有限责任公司 A kind of tup of percussive drill
CN105750596B (en) * 2015-12-08 2018-06-05 博世电动工具（中国）有限公司 drill bit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226537A2 (en) * 1985-12-16 1987-06-24 HILTI Aktiengesellschaft Rock drill bit
DE3740692A1 (en) * 1987-09-18 1989-04-06 Hawera Probst Kg Hartmetall Rock drill
DE3825107A1 (en) * 1988-07-23 1990-01-25 Hilti Ag Rock drill with cutting tip
EP0452255A2 (en) * 1990-04-09 1991-10-16 HILTI Aktiengesellschaft Stone drill bit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776819A (en) * 1953-10-09 1957-01-08 Philip B Brown Rock drill bit
US3858671A (en) * 1973-04-23 1975-01-07 Kennametal Inc Excavating tool
DE3919095A1 (en) * 1988-07-16 1990-01-18 Hawera Probst Kg Hartmetall DRILLING TOOL
US5265688A (en) * 1990-04-09 1993-11-30 Hilti Aktiengesellschaft Rock drill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226537A2 (en) * 1985-12-16 1987-06-24 HILTI Aktiengesellschaft Rock drill bit
DE3740692A1 (en) * 1987-09-18 1989-04-06 Hawera Probst Kg Hartmetall Rock drill
DE3825107A1 (en) * 1988-07-23 1990-01-25 Hilti Ag Rock drill with cutting tip
EP0452255A2 (en) * 1990-04-09 1991-10-16 HILTI Aktiengesellschaft Stone drill bit

Also Published As

Publication number Publication date
DK0778390T3 (en) 2004-02-09
CN1159382A (en) 1997-09-17
EP0778390B1 (en) 2003-10-01
JPH09177466A (en) 1997-07-08
DE59610747D1 (en) 2003-11-06
EP0778390A2 (en) 1997-06-11
CN1079045C (en) 2002-02-13
US5836408A (en) 1998-11-17
JP3907756B2 (en) 2007-04-18
DE19545646A1 (en) 1997-06-12

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