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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
  • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
• • 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
  • B23B29/03403—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing
  • B23B29/03407—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing by means of screws and nuts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2260/00—Details of constructional elements
  • B23B2260/056—Differential screw threads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2260/00—Details of constructional elements
  • B23B2260/136—Springs
• • 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
  • Y10T408/8583—Moving means including wedge, screw or cam with resiliently urged Tool

Definitions

• the present invention relates to a cutting tool having a tool body, an at least partially received in an opening of the tool body and relative to this in a setting direction between a first and a second position movable slider element and a drive shaft with two threaded portions, wherein the slider element and the tool body each have a Threaded portion, wherein the first threaded portion of the drive shaft with the threaded portion of the slider element and the second threaded portion of the drive shaft with the threaded portion of the body cooperate such that when rotating the drive shafts about its axis, the slider element are moved relative to the base body between the first and the second position can.
• Such cutting tools have been known for a long time.
• a boring tool with a basic tool body is known, on the end face of which a slide element which is adjustable relative to the tool body is provided, wherein the slide element can be moved in the radial direction.
• the slider element has either a cutting portion intended to directly contact the workpiece to be machined or a seat for receiving a cutting plate.
• the slide element engages with a drive shaft mounted in the tool main body via a thread, so that by rotating the drive shaft, the slide element can be moved back and forth in the radial direction. Since the slider element in use carries a corresponding cutting plate, can be adjusted by means of the drive shaft, the Bohrradius the Ausbohrtechnikmaschinectiones.
• the thread of the drive shaft and the corresponding thread on the tool body is often designed as a fine thread.
• this object is achieved in that a force acting on the slide element spring element is provided, which is arranged such that the slide element is biased in the direction of one of the two positions of the slide element.
• the threaded portions of the drive element as external thread and the threaded portions of the base body and the slider element are formed as female threaded portions.
• the base body may have a corresponding bore which has an internal thread for receiving the corresponding threaded portion of the drive element.
• the slide element may be sleeve-shaped, wherein the sleeve a female threaded portion which engages with the corresponding male threaded portion of the drive member.
• the two threaded sections of the drive element differ in their thread pitch and / or the direction of rotation.
• the thread pitch of a threaded portion, z. B. the threaded portion of the body between 0.2 and 0.7 mm per revolution, and the thread pitch of the other threaded portion, z. B. the threaded portion of the slider element between 0.1 and 0.5 mm per revolution both threaded portions have a right-hand thread or both threaded portions a left-hand thread.
• the drive shaft is designed in two parts, so that it consists of a double-threaded element with the two threaded sections and a drive element.
• Double thread element and drive element are preferably movable in the adjustment direction relative to each other.
• the double-threaded element and the drive element are connected to one another in a form-fitting manner.
• the positive connection is effected by a substantially slot-shaped recess and a substantially blade-shaped element which engages in the slot-shaped recess.
• the slot-shaped recess can be arranged either on the double-threaded element, this corresponds to the preferred embodiment, or on the drive element, while the blade-shaped element to the other elements, d. H. in the preferred embodiment on the drive element, is arranged.
• the torque can be transmitted to the double-threaded element in a form-fitting manner by turning the drive element.
• connection of the double thread element via a thread to the tool base body causes not only the slide element, but also the double thread element to move in the direction of adjustment (eg in the radial direction relative to the tool base body) when the drive element is actuated, but to a different extent.
• the drive element and double threaded element are coupled via the blade-shaped element and the slot-shaped recess, the drive element can be held in the direction of the adjustment in its position, without jeopardizing the functionality of the adjusting device.
• the drive element is not in or out of the base bore, but remains in the direction of adjustment, for. B. in the radial direction, in place.
• the drive shaft has a corrugation portion with a plurality of recesses or grooves
• the tool body has a resilient projection which is arranged with respect to the corrugation portion such that upon rotation of the drive shaft, the projection successively into a plurality of recesses of the corrugation section intervenes.
• the elastic projection may be formed, for example, as a biased with a spring element pressure piece.
• the threaded portion of the base body and / or the threaded portion of the spindle member are formed by a separate, but firmly connected in the main body or spindle element sleeve, wherein the sleeve is preferably formed from a copper-tin-zinc casting alloy.
• FIG. 1 is a bottom view of a preferred embodiment of the invention
• FIG. 2 shows a sectional view along the line A-A of FIG. 1,
• FIG. 3 is a sectional view taken along the line B-B of FIG. 2;
• Figure 4 is a partial sectional view taken along the line C-C of Figure 2, and
• Figure 5 is a schematic representation of the threaded portions including spring element.
• FIG. 1 shows an embodiment of the invention.
• the cutting tool 1 with a cutting plate 2 held on a slide element 3 can be seen in a view from below. For better clarity, the holder of the cutting insert 2 in the slide element 3 is not shown.
• the slider element 3 is received in a corresponding stepped bore in the tool body 4.
• the slide element is designed substantially sleeve-shaped and is prevented by means of the rotation 5 on a rotation about the axis 6.
• a bush 7 is arranged, which is fixedly connected to the slider element 3.
• This socket can be made for example of gunmetal.
• the bush 7 has an internal thread which provides the threaded portion of the slider element mentioned above.
• the slider member 3 has an outer diameter substantially equal to the inner diameter of the larger inner diameter portion of the tool body housing bore. The internal thread of the bushing 7 engages with a threaded portion of a double-threaded spindle 8.
• the double-threaded spindle 8 has a second threaded section which engages with a main body bushing 9 connected to the main body 4.
• the main body bush 9 may also be made of gunmetal.
• the double-threaded spindle 8 has a slot-shaped recess in which a blade-shaped or blade-shaped section of the sword spindle 10 engages.
• the sword spindle 10 is held by means of a web element 1 1 in the smaller diameter portion of the horrendleton.
• the sword spindle 10 can be rotated about its longitudinal axis 6. Due to the fact that the blade-shaped element of the sword spindle is seated in the slot-shaped recess of the double-threaded spindle, the rotational movement of the sword spindle 10 is transmitted to the double-threaded spindle 8. Since the double-threaded spindle 8 runs in a thread of the main body bushing 9, this rotation leads to a radial movement of the double-threaded spindle 8.
• the main body bushing 9 has a thread pitch of 0.3 mm per revolution.
• the double-threaded spindle 8 engages at the same time with its second thread, which may have a pitch of 0.25 mm per revolution in a preferred embodiment, in the internal thread of the slide bushing 7 a.
• the slide element 3 does not completely comprehend the movement in the radial direction of the double-threaded spindle 8, since the second thread ensures that the slide element 3 moves in the radial direction relative to the double-threaded spindle 8.
• the slider element moves by the difference of the two thread pitches, i. H. by 0.05 mm per revolution of the sword spindle.
• the sword spindle 10 has, in addition to the blade or blade-shaped portion 15, a disc portion 14, wherein the disc has a plurality of recesses forming grooves on its outer edge.
• a spring-biased pressure piece 16 is arranged in the tool base body 4, which rests in the corresponding grooves of the disk-shaped portion 14 of the sword spindle 10.
• a spring element 13 is provided which, in the embodiment shown, engages both the base body 4 and the base body bushing 9 fastened to the base body 4 and the sliding element 3 and the sliding element 3 to the outside, ie from 5, since the threads involved inevitably have a certain play, the situation shown schematically in FIG.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Details Of Cutting Devices (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43983302

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (5)

Citations (7)

Family Cites Families (13)

• 2010
  • 2010-03-03 DE DE102010002557A patent/DE102010002557A1/de not_active Withdrawn
• 2011
  • 2011-02-18 WO PCT/EP2011/052424 patent/WO2011107357A1/de not_active Ceased
  • 2011-02-18 KR KR1020127022862A patent/KR20130038191A/ko not_active Withdrawn
  • 2011-02-18 US US13/581,828 patent/US20130209188A1/en not_active Abandoned
  • 2011-02-18 CN CN2011800123010A patent/CN103079734A/zh active Pending
  • 2011-02-18 EP EP11705508A patent/EP2542367A1/de not_active Withdrawn
  • 2011-02-18 JP JP2012555358A patent/JP2013521139A/ja active Pending

Patent Citations (8)

Also Published As

Similar Documents

Legal Events