GB2168627A - Connector for boring bars - Google Patents

Connector for boring bars Download PDF

Info

Publication number
GB2168627A
GB2168627A GB8529510A GB8529510A GB2168627A GB 2168627 A GB2168627 A GB 2168627A GB 8529510 A GB8529510 A GB 8529510A GB 8529510 A GB8529510 A GB 8529510A GB 2168627 A GB2168627 A GB 2168627A
Authority
GB
United Kingdom
Prior art keywords
sleeve
boring bar
connector
boring
inner tube
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.)
Withdrawn
Application number
GB8529510A
Other versions
GB8529510D0 (en
Inventor
Colin Gregor Morcom
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.)
Keeton Sons and Co Ltd
Original Assignee
Keeton Sons and Co Ltd
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 Keeton Sons and Co Ltd filed Critical Keeton Sons and Co Ltd
Publication of GB8529510D0 publication Critical patent/GB8529510D0/en
Publication of GB2168627A publication Critical patent/GB2168627A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
    • B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
    • B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/087—Joints with radial fluid passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/04—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies allowing adjustment or movement

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

A boring bar comprises a first sleeve-like member 1 adapted to be secured directly to the drive head 2 of a boring machine; an outer casing 7 mounted on the first sleeve- like member with provision for relative rotary motion therebetween; a passageway through the outer casing and a connection means to the passageway for a supply of cutting fluid; and one or more passageways 10 through the sleeve-like member for the admission of cutting fluid to the interior of the sleeve-like member. A second sleeve-like member 3 extends from and is rotatable with the first sleeve-like member; and in use a boring bar 6 is located in the second sleeve-like member and extends into and is secured to the first sleeve like member to define an annular gap between the bar and members for the conduction of cutting fluid. <IMAGE>

Description

SPECIFICATION Connector for boring bars This invention relates to connectors for boring bars for the drilling of holes in workpieces.
Predominantly, boring bars for the drilling of holes in workpieces are held stationary, and the workpiece rotated at an appropriate speed. In such constructions the application of a cutting fluid to assist penetration of the boring bar through the workpiece and to remove swarf and other debris from the bottom of the hole can relatively simply be achieved.
There is, however, a major advantage to be had if the boring bar itself is rotatable during the cutting operation. This enables a workpiece to be held stationary as is sometimes desirable and equally has the advantage that with the workpiece and the boring bar both rotating, considerably greater control over cutting speeds can be achieved. However, with a rotating boring bar there is the need to provide an effective means of supplying cutting fluid.
The object of the invention is to meet the above required need.
According to the present invention, a connector for a boring bar comprises a first sleeve-like member adapted to be secured directly to the drive head of a boring machine, an outer casing mounted on the first sleevelike member with provision for relative rotary motion between the outer casing and the sleeve-like member, a passageway through the outer casing and a connection means to the passageway for a supply of cutting fluid, and one or more passageways through the sleevelike member for the admission of cutting fluid to the interior of the sleeve-like member, and there being a second sleeve-like member extending from and rotatable with the first sleeve-like member.
Thus, in use, the inner tube of a boring bar is located within the second sleeve-like member and extends into and is secured to the first sleeve-like member. The relative diameters are such that an annular chamber is formed between the first sleeve-like member and the inner tube of the boring bar and an annular gap provided between the second sleeve-like member and the inner tube of the boring bar. A drilling head is located in screwthreaded engagement in the end of the second sleeve-like member, the inner tube of the boring bar extending into the drilling head to a position close to the outer end of the drilling head.
Thus, with the drive head of the machine rotated, this causes rotation of the first and second sleeve-like members, and hence the inner tube and the drilling head of the boring bar. By virtue of the ability for there to be relative rotary movement as between the first sleeve-like member and the outer casing, the outer casing can be held stationary by its connection to a source of cutting fluid, and for cutting fluid to have substantially free entry into the annular chamber between the first sleeve-like member and the inner tube of the boring bar. From there cutting fluid passes down the annular gap between the second sleeve-like member and to the drilling head, from where it emerges into the drilled hole through transverse passageways formed through the drilling head.As cutting fluid is pumped into the annular chamber and through the annular gap, to emerge in the hole, it passes around the drilling head with then the required lubricating effect, from where it enters the interior of the hollow drilling head and into the inner tube of the boring bar to carry swarf and other debris away from the bottom of the drilled hole.
One embodiment of the invention is illustrated in the accompanying drawing which is a transvers section through a boring bar connector.
As illustrated, a rotary connector for a boring bar has a first sleeve-like member 1 connected at one end to the drive head 2 of a boring machine. At the opposite end, a second sleeve-like member 3 is secured to the end of the first sleeve-like member, and has a bore 4 that forms a continuation of the chamber 5 formed within the sleeve-like member 1.
A boring bar tube 6 passes through the sleeve-like member 3 and into the sleeve-like member 1 to be secured thereto at the end of the chamber remote from the sleeve-like member 3.
Encircling the sleeve-like member 1 is a casing 7 mounted on the sleeve-like member 1 by bearings 8 and whereby relative rotary motion is permitted between the casing and the sleeve-like member 1. The casing has a connector 9 for cutting fluid, co-operating with access holes 10 in the sleeve-like member 1.
Two seals 11 are provided to prevent leakage of cutting fluid.
Although not shown, at the free end of the sleeve-like member 3 a hollow drilling head is provided in screw-threaded engagement with the end of the tube and into which the boring bar tube extends.
Thus, in a boring operation where the boring bar needs to be rotated, with the workpiece either stationary or itself rotating, rotation of the drive head 2 causes rotation of the sleeve-like member 1, the sleeve-like member 3, the boring bar tube 6, and the drilling head.
By being mounted on bearings 8, and by being connected at 9 to a source of cutting fluid, the casing 7 is held stationary during rotation of the boring bar, there being unimpeded access through the connector 9 and the passageways 10 of cutting fluid into the chamber 5, from where it runs through the annular gap formed between the sleeve-like member 3 and the boring bar tube 6 to the drilling head. The drilling head is formed with transverse holes whereby cutting fluid can emerge into the hole being bored, to lubricate the drilling head and to carry swarf away from the cutting head through its hollow body and into the interior of the boring bar tube. Spent fluid then travels through the boring bar tube, through the connector and through a passageway formed through the boring machine, from where it is collected either for disposal or for reprocessing to remove the entrained swarf.

Claims (6)

1. A connector for a boring bar comprising a first sleeve-like member adapted to be secured directly to the drive head of a boring machine, an outer casing mounted on the first sleeve-like member with provision for relative rotary motion between the outer cas#ing and the sleeve-like member, a passageway through the outer casing and a connection means to the passageway for a supply of cutting fluid, and one or more passageways through the sleeve-like member for the admission of cutting fluid to the interior of the sleeve-like member, and there being a second sleeve-like member extending from and rotatable with the first sleeve-like member.
2. A connector for a boring bar as in Claim 1, wherein the second sleeve-like member is separately formed from and suitably secured to the end of the first sleeve-like member.
3. A connector for a boring bar as in Claim 1 or Claim 2, wherein, in use, the inner tube of a boring bar is located within the second - sleeve-like member and extends into and is secured to the first sleeve-like member.
4. A connector for a boring bar as in Claim 3, wherein the relative diameters of the sleeve-like members and the inner tube of the boring bar are such that an annular chamber is formed between the first sleeve-like member and the inner tube of the boring bar and an annular gap provided between the second sleeve-like member and the inner tube of the boring bar.
5. A connector for a boring bar as in any of Claims 1 to 4, wherein, in use, a drilling head is located in screw-threaded engagement in the end of the second sleeve-like member, the inner tube of the boring bar extending into the drilling head to a position close to the outer end of the drilling head.
6. A connector for a boring bar, substantially as hereinbefore described with reference to the accompanying drawings.
GB8529510A 1984-12-21 1985-11-29 Connector for boring bars Withdrawn GB2168627A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8432473A GB8432473D0 (en) 1984-12-21 1984-12-21 Connector

Publications (2)

Publication Number Publication Date
GB8529510D0 GB8529510D0 (en) 1986-01-08
GB2168627A true GB2168627A (en) 1986-06-25

Family

ID=10571637

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8432473A Pending GB8432473D0 (en) 1984-12-21 1984-12-21 Connector
GB8529510A Withdrawn GB2168627A (en) 1984-12-21 1985-11-29 Connector for boring bars

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8432473A Pending GB8432473D0 (en) 1984-12-21 1984-12-21 Connector

Country Status (1)

Country Link
GB (2) GB8432473D0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635332A1 (en) * 1993-07-24 1995-01-25 Hermann Oesterle Tool head
CN103481098A (en) * 2013-09-29 2014-01-01 大连机床(数控)股份有限公司 Floating connector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1460959A (en) * 1974-12-19 1977-01-06 Sandvik Ab Coupling means for a drilling machine
GB2082099A (en) * 1980-02-01 1982-03-03 Heller Werkzeug Gmbh Geb Drilling chuck with jaw for hand drill
EP0072657A1 (en) * 1981-08-17 1983-02-23 Kennametal Erickson U.K. Limited An attachment for fitting to a drive spindle of a machine
EP0095449A1 (en) * 1982-05-21 1983-11-30 Seco Tools Ab Device for transferring fluid to a rotating tool holder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1460959A (en) * 1974-12-19 1977-01-06 Sandvik Ab Coupling means for a drilling machine
GB2082099A (en) * 1980-02-01 1982-03-03 Heller Werkzeug Gmbh Geb Drilling chuck with jaw for hand drill
EP0072657A1 (en) * 1981-08-17 1983-02-23 Kennametal Erickson U.K. Limited An attachment for fitting to a drive spindle of a machine
EP0095449A1 (en) * 1982-05-21 1983-11-30 Seco Tools Ab Device for transferring fluid to a rotating tool holder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635332A1 (en) * 1993-07-24 1995-01-25 Hermann Oesterle Tool head
CN103481098A (en) * 2013-09-29 2014-01-01 大连机床(数控)股份有限公司 Floating connector
CN103481098B (en) * 2013-09-29 2016-08-10 大连机床(数控)股份有限公司 Floating junction

Also Published As

Publication number Publication date
GB8529510D0 (en) 1986-01-08
GB8432473D0 (en) 1985-02-06

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)