WO2012106243A3 - Drill bit - Google Patents

Drill bit Download PDF

Info

Publication number
WO2012106243A3
WO2012106243A3 PCT/US2012/023110 US2012023110W WO2012106243A3 WO 2012106243 A3 WO2012106243 A3 WO 2012106243A3 US 2012023110 W US2012023110 W US 2012023110W WO 2012106243 A3 WO2012106243 A3 WO 2012106243A3
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
drill bit
edge
cutting edge
flute
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.)
Ceased
Application number
PCT/US2012/023110
Other languages
French (fr)
Other versions
WO2012106243A2 (en
Inventor
Christopher L. White
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP12741776.4A priority Critical patent/EP2670551A2/en
Publication of WO2012106243A2 publication Critical patent/WO2012106243A2/en
Publication of WO2012106243A3 publication Critical patent/WO2012106243A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0081—Conical drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/28—Arrangement of teeth
    • B23B2251/282—Unequal spacing of cutting edges in the circumferential direction
    • 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
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

A drill bit for cutting successively larger holes in a substrate includes a conically-shaped body having first and second cutting flutes extending along the length of the body. The first cutting flute includes a first cutting edge and the second cutting flute includes a second cutting edge. The first and second cutting edges are offset relative to each other to create a cutting angle adapted to reduce chatter.
PCT/US2012/023110 2011-01-31 2012-01-30 Drill bit Ceased WO2012106243A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12741776.4A EP2670551A2 (en) 2011-01-31 2012-01-30 Drill bit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201161438006P 2011-01-31 2011-01-31
US61/438,006 2011-01-31
US13/358,962 2012-01-26
US13/358,962 US20120195704A1 (en) 2011-01-31 2012-01-26 Drill bit

Publications (2)

Publication Number Publication Date
WO2012106243A2 WO2012106243A2 (en) 2012-08-09
WO2012106243A3 true WO2012106243A3 (en) 2012-11-08

Family

ID=46577486

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/023110 Ceased WO2012106243A2 (en) 2011-01-31 2012-01-30 Drill bit

Country Status (3)

Country Link
US (1) US20120195704A1 (en)
EP (1) EP2670551A2 (en)
WO (1) WO2012106243A2 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2579514B (en) 2013-06-06 2020-12-16 Milwaukee Electric Tool Corp Step drill bit
US9687915B2 (en) * 2013-06-14 2017-06-27 Irwin Industrial Tool Company Step drill
AT15012U1 (en) * 2015-10-06 2016-11-15 Ceratizit Austria Gmbh drilling
US10058929B2 (en) * 2015-11-10 2018-08-28 Irwin Industrial Tool Company Step drill bit with variable helical flute
US11007583B2 (en) * 2016-02-14 2021-05-18 Hongjia Wang Twist drill
USD814850S1 (en) * 2016-03-04 2018-04-10 Shorefield Holdings, LLC Mixer
US10486121B2 (en) 2016-03-04 2019-11-26 Shorefield Holdings, LLC Mixing assembly for mixing a product
US10506897B2 (en) 2016-03-04 2019-12-17 Shorefield Holdings, LLC Mixing assembly for mixing a product
US10836557B2 (en) 2016-04-23 2020-11-17 Shorefield Holdings Llc Insulated bottle
US10195675B2 (en) * 2017-03-02 2019-02-05 Kennametal Inc. Twist drill with unequal flute spacing and unequal relief angles
USD822730S1 (en) 2017-04-07 2018-07-10 Shorefield Holdings, LLC Mixing structure
US11273501B2 (en) 2018-04-26 2022-03-15 Milwaukee Electric Tool Corporation Step drill bit
USD872783S1 (en) * 2018-04-27 2020-01-14 Milwaukee Electric Tool Corporation Step drill bit
WO2020023600A1 (en) * 2018-07-24 2020-01-30 Milwaukee Electric Tool Corporation Drilling tool assembly including a step drill bit
USD980979S1 (en) * 2018-11-30 2023-03-14 Shukla Medical Nail extractor
DE102019135404A1 (en) 2019-12-20 2021-06-24 Gühring KG Twist drill with a stepped cutting tip
EP4097544A4 (en) * 2020-01-30 2024-05-15 Milwaukee Electric Tool Corporation Automatic step bit detection
USD1050206S1 (en) * 2022-01-12 2024-11-05 Zonghong Li Drill bit with sleeve
DE102022208205A1 (en) * 2022-08-08 2024-02-08 Robert Bosch Gesellschaft mit beschränkter Haftung Drills, especially wood drills
USD1033191S1 (en) * 2022-08-10 2024-07-02 Black & Decker Inc. Step drill bit
AU2022475626A1 (en) * 2022-08-24 2025-03-20 Tec-Spiral Enterprises Tools Co., Ltd Step drill and method for drilling a workpiece by using a step drill
USD1061646S1 (en) * 2023-04-26 2025-02-11 Hongdan Qu Drill bit
USD1069871S1 (en) * 2023-09-01 2025-04-08 Shajeng Hardware Co., Ltd. Step drill
CN121315306A (en) * 2024-02-18 2026-01-13 上海钰工工具有限公司 Drilling section and hole-making tool for hole machining

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913603A (en) * 1986-11-25 1990-04-03 Sphinzwerke Muller AG Spiral drill
JP2007203396A (en) * 2006-01-31 2007-08-16 Jefcom Kk Steped drill
US20080166195A1 (en) * 2007-01-05 2008-07-10 Gentry Charles L Spiral drill bit and method of forming same
WO2009153066A1 (en) * 2008-06-21 2009-12-23 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Drill
JP3165636U (en) * 2010-08-10 2011-01-27 協正金屬實業有限公司 Structure that increases the drill head strength of step drills and improves chipping

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1080865A (en) * 1953-06-06 1954-12-14 Drill-blade with multiple diameters by removable elements
US2897696A (en) * 1956-01-13 1959-08-04 Henry R Tisserant Sheet metal panel drill
GB1202086A (en) * 1967-10-10 1970-08-12 Barworth Flockton Ltd Improved drill
DE2921190C2 (en) * 1979-05-25 1985-05-09 Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt Conical sheet metal drills, in particular for making openings in body parts for cavity preservation
US4560309A (en) * 1983-01-25 1985-12-24 The Oilgear Company Two tooth tapered reamer
US4582458A (en) * 1984-08-09 1986-04-15 American Saw & Mfg. Company Stepped drill construction
JP3597774B2 (en) * 2000-10-02 2004-12-08 協興ツール株式会社 Drill with taper
US6890133B2 (en) * 2002-10-18 2005-05-10 Irwin Industrial Tool Company Stepped drill bit having split tip
JP2005246577A (en) * 2004-03-08 2005-09-15 Hitachi Tool Engineering Ltd Deburring drill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913603A (en) * 1986-11-25 1990-04-03 Sphinzwerke Muller AG Spiral drill
JP2007203396A (en) * 2006-01-31 2007-08-16 Jefcom Kk Steped drill
US20080166195A1 (en) * 2007-01-05 2008-07-10 Gentry Charles L Spiral drill bit and method of forming same
WO2009153066A1 (en) * 2008-06-21 2009-12-23 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Drill
JP3165636U (en) * 2010-08-10 2011-01-27 協正金屬實業有限公司 Structure that increases the drill head strength of step drills and improves chipping

Also Published As

Publication number Publication date
US20120195704A1 (en) 2012-08-02
WO2012106243A2 (en) 2012-08-09
EP2670551A2 (en) 2013-12-11

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