US3364799A - Offset boring head - Google Patents

Offset boring head Download PDF

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Publication number
US3364799A
US3364799A US510538A US51053865A US3364799A US 3364799 A US3364799 A US 3364799A US 510538 A US510538 A US 510538A US 51053865 A US51053865 A US 51053865A US 3364799 A US3364799 A US 3364799A
Authority
US
United States
Prior art keywords
slide
dial
boring head
locking
slideway
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
US510538A
Other languages
English (en)
Inventor
Milton L Benjamin
David D Walker
Wilbur N Miles
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.)
Erickson Tool Co
Original Assignee
Erickson Tool Co
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 Erickson Tool Co filed Critical Erickson Tool Co
Priority to US510538A priority Critical patent/US3364799A/en
Priority to GB9144/66A priority patent/GB1124833A/en
Priority to DE66E31223A priority patent/DE1552252C3/de
Application granted granted Critical
Publication of US3364799A publication Critical patent/US3364799A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03432—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing
    • B23B29/03446—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing by means of inclined planes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/088—Indication scales
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2222—Tool adjustable relative to holder
    • Y10T407/2244—Tool adjustable relative to holder by movement of seat relative to holder
    • Y10T407/2246—Pivoted seat
    • 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
    • Y10T408/83—Tool-support with means to move Tool relative to tool-support
    • Y10T408/85—Tool-support with means to move Tool relative to tool-support to move radially
    • Y10T408/858—Moving means including wedge, screw or cam
    • Y10T408/8588—Axially slidable moving-means
    • Y10T408/85892—Screw driven wedge or cam
    • Y10T408/85895—Traveling wedge
    • Y10T408/858953—Interfitting, tool-retaining wedge
    • Y10T408/858955—Interfitting, tool-retaining wedge including separable interfitting element

Definitions

  • An adjustable boring head having a tool mounting slide movable lengthwise in a slideway, and releasable locking means for drawing the tool mounting slide against the slideway thereby to frictionally lock the tool mounting slide in adjusted position.
  • This invention relates to a precision offset boring head by which tool settings may be made and maintained with great accuracy.
  • FIG. 1 is a side elevation view of an offset boring head according to the present invention
  • FIG. 2 is an end elevation view as viewed from the left-hand side of FIG. 1;
  • FIG, 3 is a cross-section view taken substantially along the line 33, FIG. 1;
  • FIG. 4 is a cross-section view taken substantially along the line 44, FIG. 2;
  • FIG. 5 is a cross-section view taken substantially along the line 5-5, FIG. 4;
  • FIG. 6 is a cross-section view taken substantially along the line 66, FIG. 3;
  • FIG. 7 is a cross-section View taken substantially along the line 77, FIG. 4;
  • FIG. 8 is a fragmentary crosssection view on enlarged scale taken substantially along the line 88, FIG. 6;
  • FIG. 9 is an end elevation view of the main body by itself as viewed from the left-hand side of FIG. 4.
  • the offset boring head 1 herein comprises a main body or housing 2 having a central internally threaded bore 3 for mounting on a shank or the like (not shown) through which the offset boring head 1 is adapted to be mounted in a spindle or similar part of a machine tool for rotation thereby.
  • a tool holding slide 4 is mounted for adjustment within the body 2 as hereinafter described in detail, and is formed with cross bores 5 and 6 for receiving the shank of a cutting tool (not shown) either in axially disposed position in bore '5, or radially disposed position in bore 6, such tool being locked in either bore by the setscrew 7.
  • An adjusting dial 3 is rotatably mounted on the body 2 and has indicia cooperating with Vernier indicia on the adjacent portion of body 2, rotation of the dial 8 thus effecting precision radial adjustment of the tool holding slide 4.
  • Said dial 8 is held against axial movement on 'body 2 by means of the cap 9 which is mounted on the latter by screws 10.
  • a thumb screw 11 which forms part of a locking mechanism extends outwardly from the body 2 for locking the slide 4 and dial *3 in adjusted position.
  • rotation of the dial 8 will vary the radial distance between the axes of bores 3 and 5, whereby a cutting tool in said bore 5 (or in the other bore 6) may be precisely radially adjusted to permit holes of varying sizes to be accurately bored in a workpiece.
  • the portion of the body 2 on which the dial 8 rotates has perpendicular diametrical slots 12 and 14 to axially guide the adjusting bar 15 which has its ends in threaded engagement with said dial 8 as best shown in FIG. 5, and to receive for radial movement the flatted extension 16 of the slide 4, the slot -14 being enlarged in width to define with cap 9 a slideway 17.
  • the extension 16 has an obliquely disposed cam slot 18, and, as evident from FIG. 4, when the bar 15 is moved toward the right in the slot 12, it will, in engaging the cam slot 18, cause downward radial movement of the slide 4, thus shifting the axis of the bore 5' with respect to the axis of the threaded bore 3 in the body 2.
  • the opening 19 through the cap 9 is elongated as shown in FIGS. 2 and 4 to permit radial movement of the slide 4 in response to rotation of the dial 8.
  • the locking assembly previously referred to as being operated by thumb screw 11 comprises a pair of axially movable locking pins 2i) which are hooked over (see FIG. 8) the opposite edges of the flanges 21 of the slide and springs 23 in said pins 24 are operative to yieldably hold the flanges 21 against the bottom surfaces 24 of the slideway 17, so that under the infience of axial thrust loads on a cutting tool mounted in the slide 4 there is no movement which would disturb its precise setting.
  • the other ends of the locking pins 2%) are notched to provide beveled cam surfaces 25 engaged by transverse cam pins 26, the latter being actuated by turning the thumb screw 11, there being a force transmission member 27 (such as a Woodruif key) between the end of the thumb screw 11 and the ends of the cam pins 26 as shown in FIGS. 3 and 6.
  • a force transmission member 27 such as a Woodruif key
  • the present invention provides an offset boring head l which is compact and highly simplified in construction, and which is capable of achieving and maintaining highly precise adjustment.
  • An adjustable boring head comprising a body having a transverse slideway; a tool mounting slide movable lengthwise in said slideway; dial means rotatable on said body and operatively connected to said slide to adjustably position the latter in said slideway responsive to rotation of said dial means; and releasable locking means in said body engaged with said slide for drawing said slide against said slideway thereby to frict-ionally lock said slide in adjusted position with respect to said body.
  • spring means associated with said locking means is eftective to yieldably retain said slide against said slideway when said locking means is released for adjustment of said slide.
  • said releasable locking means comprises at least one pin member axially movable in said body and having a portion transversely overlapped with said slide, and pin actuating means for moving said pin so as to draw said slide against said slideway.
  • the adjustable boring head of claim 1 wherein there are a pair of axially movable pin members in said body having a portion transversely overlapped with said slide, and and said pin actuating means includes a pair of transverse cam pins, said pin members having beveled cam surfaces engaged by said cam pins, and means for actuating said cam pins toward said pin members to draw said pin members in a direction urging said slide against said slideway.
  • said last-mentioned means comprises a thumb screw which when tightened urges a force transmission member against the outer ends of said cam pins.
  • An adjustable boring head comprising a body having a transverse slideway; a tool mounting slide movable lengthwise in said slideway; dial means rotatable on said body and operatively connected to said slide to adjustably position the latter in said slideway responsive to rotation of said dial means; an expansible ring non-rotatably mounted in said body and disposed within said dial means; and means for expanding said ring into engagement with said dial means thereby to frictionally lock said dial means at the desired adjusted position.
  • said means for expanding said rin into engagement with said dial means comprises a thumb screw, a bushing in an opening in said body in which said thumb screw is threaded, a pair of pin means engaged in opposite grooves in said bushing for holding said bushing against rotation in said body, the inner ends of said pin means engaging the ends of said locking ring, said thumb screw, when tightened, forcing said bushing out of said body to cause said grooves in said bushing to act as cam surfaces to spread said pin means apart for expanding said locking ring.
  • An adjustable boring head comprising a body having a transverse slideway; a tool mounting slide movable lengthwise in said slideway; dial means rotatable on said body and operatively connected to said slide to adjustably position the latter in said slideway responsive to rotation of said dial means; and releasable locking means in said body engaged with said slide for drawing said slide against said slideway thereby to frictionally lock said slide in adjusted position with respect to said body, said locking means further including an expansible ring nonrotatably mounted in said body and disposed within said dial means, and means for expanding said ring into engagement with said dial means thereby to frictionally lock said dial means at the desired adjusted position of said slide.
  • said releasable locking means comprises at least one pin member axially movable in said 'body and having a portion transversely overlapped with said slide, and pin actuating means including a thumb screw for moving said pin member so as to draw said slide against said slideway; and means for expanding said ring into engagement with said dial means comprising a bushing in which said thumb screw is threaded, and a pair of additional pins engaged in opposite grooves in said bushing for holding said bushing against rotation in said body, the inner ends of said additional pins engaging the ends of said locking ring, whereby tightening of said thumb screw tends to force said bushing outwardly of said body during which said grooves in said bushing act as cam surfaces to spread said additional pins apart for expanding said locking ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Jigs For Machine Tools (AREA)
  • Earth Drilling (AREA)
  • Details Of Cutting Devices (AREA)
US510538A 1965-11-30 1965-11-30 Offset boring head Expired - Lifetime US3364799A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US510538A US3364799A (en) 1965-11-30 1965-11-30 Offset boring head
GB9144/66A GB1124833A (en) 1965-11-30 1966-03-02 Offset boring head
DE66E31223A DE1552252C3 (de) 1965-11-30 1966-03-11 Bohrkopf mit einstellbaren Werkzeugen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US510538A US3364799A (en) 1965-11-30 1965-11-30 Offset boring head

Publications (1)

Publication Number Publication Date
US3364799A true US3364799A (en) 1968-01-23

Family

ID=24031161

Family Applications (1)

Application Number Title Priority Date Filing Date
US510538A Expired - Lifetime US3364799A (en) 1965-11-30 1965-11-30 Offset boring head

Country Status (3)

Country Link
US (1) US3364799A (de)
DE (1) DE1552252C3 (de)
GB (1) GB1124833A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5971675A (en) * 1997-08-12 1999-10-26 Industrias Romi, S.A. Boring device
US20040028487A1 (en) * 2000-12-18 2004-02-12 Cardemon Richard A. Slidable boring tool with fine adjustment
US6705184B2 (en) * 2000-12-18 2004-03-16 Cardemon Inc. Adjustment method and apparatus for a boring tool
US20050268759A1 (en) * 2002-04-25 2005-12-08 Cardemon Richard A Slidable boring tool with fine adustment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159060A (en) * 1963-02-08 1964-12-01 Erickson Tool Co Offset boring head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159060A (en) * 1963-02-08 1964-12-01 Erickson Tool Co Offset boring head

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5971675A (en) * 1997-08-12 1999-10-26 Industrias Romi, S.A. Boring device
US20040028487A1 (en) * 2000-12-18 2004-02-12 Cardemon Richard A. Slidable boring tool with fine adjustment
US6705184B2 (en) * 2000-12-18 2004-03-16 Cardemon Inc. Adjustment method and apparatus for a boring tool
US20050111926A9 (en) * 2000-12-18 2005-05-26 Cardemon Richard A. Slidable boring tool with fine adjustment
US20060029476A1 (en) * 2000-12-18 2006-02-09 Cardemon Richard A Adjustment method and apparatus for a boring tool
US7029209B2 (en) 2000-12-18 2006-04-18 Cardemon, Inc. Slidable boring tool with fine adjustment
US7272877B2 (en) 2000-12-18 2007-09-25 Cardemon, Inc. Adjustment method and apparatus for a boring tool
US20050268759A1 (en) * 2002-04-25 2005-12-08 Cardemon Richard A Slidable boring tool with fine adustment

Also Published As

Publication number Publication date
DE1552252C3 (de) 1979-03-01
DE1552252B2 (de) 1978-06-22
DE1552252A1 (de) 1969-06-26
GB1124833A (en) 1968-08-21

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