Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
  • B23B31/006—Conical shanks of tools
• • 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
  • Y10T279/00—Chucks or sockets
  • Y10T279/34—Accessory or component
• • 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
  • Y10T279/00—Chucks or sockets
  • Y10T279/34—Accessory or component
  • Y10T279/3493—Protection means; e.g., cover, seal, overstress prevention, air blast
• • 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
  • Y10T279/00—Chucks or sockets
  • Y10T279/35—Miscellaneous
• • 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
  • Y10T409/00—Gear cutting, milling, or planing
  • Y10T409/30—Milling
  • Y10T409/309352—Cutter spindle or spindle support
  • Y10T409/309408—Cutter spindle or spindle support with cutter holder

Definitions

• Tool holder and probe with a tool holder
• the invention relates to a tool holder according to the Obergebriff of claim 1 and a probe with a tool holder.
• a machine tool for e.g. High speed machining like
• High-speed milling usually has a so-called motor spindle, which has a rotating spindle shaft and a shaft housing in which the spindle shaft is mounted. With the enormous rotational speeds of the spindle shaft in the high-speed machining, this and the shaft housing heats up. Therefore, the standing shaft housing of a spindle is equipped with a cooling.
• the heat can not be dissipated completely by the cooling system.
• a heat input takes place on the clamped in the tool spindle tool holder and the tool mounted therein.
• this first has ambient temperature, as well as a tool arranged therein, such as a probe.
• the "warm” spindle heats the tool holder and an inserted tool.
• the consequence of this heat input is that the tool holder and the tool length. Unless such a dimensional change is detected, it may be adversely affected in a process step, e.g. a measurement in terms of their accuracy.
• the invention is based on the object to reduce the consequences of the heat flow of a spindle on a tool holder.
• the invention is initially based on a tool holder for attaching a probe to a machine tool with an interface to a machine tool.
• the tool holder comprises from the interface for the spindle from a material portion which differs from the usual base material of a tool holder by a smaller coefficient of linear expansion ⁇ and / or a smaller thermal conductivity ⁇ .
• the essential aspect of the invention is that the material section a thermal decoupling between the tool side Section of the tool holder and a tool received therein formed by the tool spindle to reduce a change in length due to a heat input coming from a comparatively warmer tool spindle.
• the material section comprises the complete tool holder, e.g. to a probe. That In such an embodiment, the tool holder completely made of a material having a smaller coefficient of linear expansion and / or a smaller thermal conductivity.
• the material section has a coefficient of linear expansion ⁇ of ⁇ 5 ⁇ m / mK and / or a thermal conductivity ⁇ of ⁇ 11 W / mK.
• Usual steel grades for a tool holder regularly have a coefficient of linear expansion which lies between 12 ⁇ m / mK and 16 ⁇ m / mK.
• the material section divides the tool holder.
• the material section does not extend over the entire cutting surface of a tool holder, but only over a partial area.
• the material section preferably extends over at least one continuous cut transversely to the tool receiving axis through the tool holder over more than 50% of a sectional area projected in the axial direction.
• the material portion is located at a distance from a contact surface of the interface to a spindle, that the tool holder base material remains only in a thickness sufficient to provide a necessary inherent stability for the tool holder, in particular at To provide contact point to the spindle.
• the tool holder is from a point which is located at a distance A to a spindle nose of the tool spindle, carried out in the material that has a smaller
• the tool holder can, so to speak, be "hollowed out” and filled with the material with a lower coefficient of linear expansion and / or lower thermal conductivity, hereinafter referred to as decoupling material, whereby the decoupling material extends as far into the cross section plane Edge region of the tool holder extends that only a wall portion remains in a predetermined thickness, which is sufficient to give the tool holder the necessary stability. For example, at least at a cross-sectional area, wall thicknesses of ⁇ 10 mm remain for the decoupling material. Even better are 8 mm, 5 mm or even 3 mm. In the axial direction, the decoupling material can extend over a comparatively large area, for example over a length of 10 mm, 20 mm, 30 mm or even more millimeters. If necessary, the decoupling material reaches to the probe.
• the material portion is formed such that from a plane in which the front surface of the spindle nose is located, the shortest distance in the cut material to the material portion is not greater than 10 mm.
• the effect can be further improved if the distance is ⁇ 8 mm, possibly ⁇ 5 mm or even better ⁇ 3 mm.
• Figure 1 shows a schematic section of a tool holder with probe, inserted into a partially shown spindle receptacle. Description of the embodiment:
• a spindle 1 in which a tool holder 2 with an interface 5 is seated, on which a probe 3 is arranged.
• the probe 3 has, for example, a measuring tip 3a with a ball end 3b, e.g. a ruby ball, for precise probing of workpieces.
• the measuring tip 3 a is preferably mounted with high precision and position reproducible in the probe 3 in a mechanically deflectable manner.
• a material section 6 is inserted, which has a smaller thermal conductivity ⁇ and / or a smaller thermal expansion coefficient ⁇ compared to the usual material of the tool holder 2.
• the spindle nose 4 simultaneously forms a contact surface with planar installation 5a.
• the material section 6 has a distance A from the spindle nose 4 and extends over the entire cross section over a length 1.
• the distance A should be such that at the usual temperature conditions on a spindle thermal expansion by heat input into the material with the thickness A is not larger than 2 ⁇ m.
• the material section 6 preferably has a thermal expansion coefficient of ⁇ 5 ⁇ m / mK °, even better a thermal expansion coefficient of
• the thermal conductivity is preferably

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Automatic Control Of Machine Tools (AREA)
• Jigs For Machine Tools (AREA)
• Machine Tool Sensing Apparatuses (AREA)
• A Measuring Device Byusing Mechanical Method (AREA)
• Turning (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=39970859

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Citations (2)

Family Cites Families (20)

• 2007
  • 2007-09-11 DE DE102007043030A patent/DE102007043030B4/de not_active Expired - Fee Related
• 2008
  • 2008-09-11 EP EP08802047.4A patent/EP2188084B1/de active Active
  • 2008-09-11 CA CA2696293A patent/CA2696293A1/en not_active Abandoned
  • 2008-09-11 CN CN200880106567.XA patent/CN101842180A/zh active Pending
  • 2008-09-11 JP JP2010524401A patent/JP5602631B2/ja active Active
  • 2008-09-11 WO PCT/EP2008/007487 patent/WO2009033686A1/de not_active Ceased
• 2010
  • 2010-03-11 US US12/721,617 patent/US7946595B2/en not_active Expired - Fee Related

Patent Citations (2)

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