US3837758A - Means for damping vibrations of tools in drilling machines or the like - Google Patents

Means for damping vibrations of tools in drilling machines or the like Download PDF

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Publication number
US3837758A
US3837758A US00283232A US28323272A US3837758A US 3837758 A US3837758 A US 3837758A US 00283232 A US00283232 A US 00283232A US 28323272 A US28323272 A US 28323272A US 3837758 A US3837758 A US 3837758A
Authority
US
United States
Prior art keywords
tool
combination
spindle
tool holder
shank
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
US00283232A
Other languages
English (en)
Inventor
P Streicher
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.)
Tiefbohr Technik & Co dt GmbH
TIEFBOHR TECHNIK GmbH
Original Assignee
TIEFBOHR TECHNIK GmbH
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
Priority claimed from DE19712142549 external-priority patent/DE2142549C3/de
Application filed by TIEFBOHR TECHNIK GmbH filed Critical TIEFBOHR TECHNIK GmbH
Application granted granted Critical
Publication of US3837758A publication Critical patent/US3837758A/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
    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
    • B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
    • B23Q17/0971—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring mechanical vibrations of parts of the machine
    • B23Q17/0976—Detection or control of chatter
    • 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
    • B23B31/02—Chucks
    • B23B31/08—Chucks holding tools yieldably
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/16—Damping of vibrations
    • 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
    • Y10T408/76—Tool-carrier with vibration-damping means

Definitions

  • the second supporting means may include a rotary tool spindle having two portions which are connected to each other by the vibration damping coupling means. Also, one portion of the aforementioned assembly may constitute the tool means and the other portion may constitute a spindle of the second supporting means whereby the coupling means connects the tool means with the spindle.
  • the eddy current brake 5a comprises two pole shoes 11 (one shown in FIG. 3) which are formed on magnetizable cores 12 (one shown) and are located diametrically opposite each other with reference to the axis of the tool shank 2.
  • the cores 12 are connected to a ring 13 by means of radially extending screws (one shown in the upper portion of FIG. 3) or analogous fasteners.
  • Each of the cores 12 has a winding 14 which is connected with one of two stationary slip rings 15 by means of suitable conductor means, not shown.
  • the slip rings 15 supply to the respective windings 14 d-c current from a suitable source, not shown.
  • the eddy current brake 5a is mounted in a hollow casing 16 which consists of non-magnetizable material and comprises two mirror symmetrical sections or shells 17 and 18.
  • the sections 17, 18 of the casing 16 are connected to the ring 13 by axially parallel screws 19 or analogous fasteners so that the casing 16 rotates with the pole shoes 11. That portion of the section 18 which is remote from the section 17 has an axial extension 20 which is fixed to and rotates with the tool spindle 1 (not shown in FIGS. 3 and 4).
  • the sections 17, 18 accommodate antifriction roller bearings 21 the inner races of which are connected to and rotate with a sleeve 22.
  • FIGS. 3 and 4 The operation of the embodiment of FIGS. 3 and 4 is analogous to that of the structure shown in FIGS. 1 and 2.
  • the damping action of the eddy current brake 5a can be regulated by changing the current which energizes the windings 14.
  • 6 and 7 is rotatable in the holder 30 and the latter is held against rotation relative to the spindle by a screw 38 which makes with the axis of the spindle 10 an angle of about 70 and abuts against a flat surface 49 in a notch machined into the peripheral surface of the holder 3c.
  • the major portion of the screw 38 is received in a tapped bore of the spindle 1c.
  • the split ring 40 holds the shank 2 against extraction from the holder 3c.
  • the front end portion of the holder 30 is provided with an axial recess 42 bounded by a cylindrical surface and receiving a cruciform torque transmitting member 39 having two longer arms 44 and two shorter arms 43.
  • the shorter and longer arms 43, 44 are respectively located diametrically opposite each other.
  • the shorter arms 43 alternate with the longer arms 44 and successive arms are angularly offset relative to each other by 90.
  • the member 39 is rigidly secured to the shank 2, for example, by a ring-shaped seam of hard solder.
  • the spindle 1c When the spindle 1c is driven to rotate the holder 30 by way of the screw 38, the latter rotates the member 39 on the shank 2 by way of the coupling means including the four elastic blocks 45 which together perform the functions of elements 4 and 5 shown in FIGS. 1 and 2.
  • the blocks 45 are yieldable elements to act not unlike the helical spring 4 of FIGS. 1 or 2, and their material is elastic and exhibits damping characteristics analogous to those of the dashpot 5 in FIGS. l-2 or the eddy current brake 5a of FIGS. 3-4.
  • the holder can be said to form part of the tool, i.e., the coupling means is installed between the tool and the spindle.
  • the coupling means operates between the tool and the tool holder. Referring again to FIGS. 1 and 2, and assuming that the tool shank is mounted in a composite spindle including the portions 1 and 3, the coupling means 4, 5 can be said to operate between two relatively movable portions of a composite spindle.
  • the coupling means in the supporting means for the tool, between the tool and the supporting means or into the tool proper.
  • the coupling means in the supporting means for the workpiece, i.e., between the frame and work holder or between two relatively movable portions of the work holder.
  • the mounting of coupling means in the supporting means for workpieces is desirable and advantageous when the workpiece rotates while being engaged by the cutting device of the tool.
  • said eddy current brake comprises at least one magnetizable core, an energizable winding on said core, and means for securing said core to said spindle means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Machine Tool Units (AREA)
  • Turning (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
US00283232A 1971-08-25 1972-08-23 Means for damping vibrations of tools in drilling machines or the like Expired - Lifetime US3837758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712142549 DE2142549C3 (de) 1971-08-25 Vorrichtung zum Dämpfen von Torsions-Schwingungen beim spanabhebenden Bearbeiten von Werkstücken mit einem Tief bo hr werkzeug

Publications (1)

Publication Number Publication Date
US3837758A true US3837758A (en) 1974-09-24

Family

ID=5817737

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283232A Expired - Lifetime US3837758A (en) 1971-08-25 1972-08-23 Means for damping vibrations of tools in drilling machines or the like

Country Status (8)

Country Link
US (1) US3837758A (enrdf_load_stackoverflow)
JP (1) JPS4831575A (enrdf_load_stackoverflow)
CA (1) CA981491A (enrdf_load_stackoverflow)
CH (1) CH541376A (enrdf_load_stackoverflow)
FR (1) FR2151355A5 (enrdf_load_stackoverflow)
GB (1) GB1390544A (enrdf_load_stackoverflow)
IT (1) IT964230B (enrdf_load_stackoverflow)
PL (1) PL76081B1 (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406826A1 (de) * 1983-03-04 1984-09-06 Cincinnati Milacron Industries, Inc., Cincinnati, Ohio Gedaempfter werkzeug-revolverkopf
WO1997010912A1 (en) * 1995-09-21 1997-03-27 Teeness A/S Noise elminating adaptor for a cutting tool
US20040240955A1 (en) * 2000-12-08 2004-12-02 Sandvik Aktiebolag Metal cutting apparatus and method for damping feed-back vibrations generated thereby
WO2006013170A1 (de) * 2004-07-29 2006-02-09 Siemens Aktiengesellschaft Vorrichtung zum entkoppeln eines anbauelements von einem bewegbaren maschinenelement
WO2006058635A1 (de) * 2004-12-01 2006-06-08 Hasse & Wrede Gmbh Drehschwingungsdämpfer für eine drehbare welle, insbesondere eines getriebes oder einer verbrennungskraftmaschine
US9061355B2 (en) 2012-06-29 2015-06-23 Kennametal Inc. Tool adaptor having an integrated damping device
US9308636B2 (en) 2012-02-03 2016-04-12 Milwaukee Electric Tool Corporation Rotary hammer with vibration dampening
US9630258B2 (en) 2014-10-15 2017-04-25 Kennametal Inc Tool holder assembly with dampening elements
US9849577B2 (en) 2012-02-03 2017-12-26 Milwaukee Electric Tool Corporation Rotary hammer
US20180154453A1 (en) * 2016-12-05 2018-06-07 Kennametal Inc. Eddy current vibration absorber assembly for cutting tool
EP4086026A1 (de) * 2021-05-05 2022-11-09 CERATIZIT Austria Gesellschaft m.b.H. Zerspanungswerkzeug
CN116237782A (zh) * 2023-03-15 2023-06-09 徐州智博机车有限公司 一种用于电机端盖的定位钻孔机构
US20250034957A1 (en) * 2021-12-07 2025-01-30 Norce Innovation As Damping drill string vibrations

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035496U (ja) * 1983-08-16 1985-03-11 出光石油化学株式会社 インパルスシール用溶着装置
JPH01159385U (enrdf_load_stackoverflow) * 1988-04-26 1989-11-06

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108699A (en) * 1938-02-15 Boring bar
GB564825A (en) * 1943-04-09 1944-10-13 Siemens Schuckert Great Britai Improvements relating to rotary power-operated drilling machines
US2432383A (en) * 1944-08-25 1947-12-09 Defiance Machine Works Inc Machine tool rotary spindle stabilizer
US2458995A (en) * 1945-07-07 1949-01-11 Defiance Machine Works Inc Cutter tool vibration control
DE1238311B (de) * 1963-09-07 1967-04-06 Karl Hueller G M B H Daempfungsanordnung fuer Werkzeuge oder deren Traeger bzw. fuer Werkstuecke oder deren Traeger
US3557646A (en) * 1968-06-24 1971-01-26 United States Steel Corp Machine tool
US3663116A (en) * 1969-04-23 1972-05-16 Goetzewerke Cantilevered machine part

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108699A (en) * 1938-02-15 Boring bar
GB564825A (en) * 1943-04-09 1944-10-13 Siemens Schuckert Great Britai Improvements relating to rotary power-operated drilling machines
US2432383A (en) * 1944-08-25 1947-12-09 Defiance Machine Works Inc Machine tool rotary spindle stabilizer
US2458995A (en) * 1945-07-07 1949-01-11 Defiance Machine Works Inc Cutter tool vibration control
DE1238311B (de) * 1963-09-07 1967-04-06 Karl Hueller G M B H Daempfungsanordnung fuer Werkzeuge oder deren Traeger bzw. fuer Werkstuecke oder deren Traeger
US3557646A (en) * 1968-06-24 1971-01-26 United States Steel Corp Machine tool
US3663116A (en) * 1969-04-23 1972-05-16 Goetzewerke Cantilevered machine part

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406826A1 (de) * 1983-03-04 1984-09-06 Cincinnati Milacron Industries, Inc., Cincinnati, Ohio Gedaempfter werkzeug-revolverkopf
US4491044A (en) * 1983-03-04 1985-01-01 Cincinnati Milacron Inc. Damped tool turret
WO1997010912A1 (en) * 1995-09-21 1997-03-27 Teeness A/S Noise elminating adaptor for a cutting tool
US6082236A (en) * 1995-09-21 2000-07-04 Teeness A/S Noise elminating adaptor for a cutting tool
US7647853B2 (en) * 2000-12-08 2010-01-19 Sandvik Akiebolag Metal cutting apparatus and method for damping feed-back vibrations generated thereby
US20050262975A1 (en) * 2000-12-08 2005-12-01 Sandvik Aktiebolag Metal cutting apparatus and method for damping feed-back vibrations generated thereby
US20040240955A1 (en) * 2000-12-08 2004-12-02 Sandvik Aktiebolag Metal cutting apparatus and method for damping feed-back vibrations generated thereby
WO2006013170A1 (de) * 2004-07-29 2006-02-09 Siemens Aktiengesellschaft Vorrichtung zum entkoppeln eines anbauelements von einem bewegbaren maschinenelement
WO2006058635A1 (de) * 2004-12-01 2006-06-08 Hasse & Wrede Gmbh Drehschwingungsdämpfer für eine drehbare welle, insbesondere eines getriebes oder einer verbrennungskraftmaschine
US20070284197A1 (en) * 2004-12-01 2007-12-13 Hasse & Wrede Gmbh Rotary oscillation damper for a rotary shaft, particularly of a gearbox or an internal combustion engine
US9849577B2 (en) 2012-02-03 2017-12-26 Milwaukee Electric Tool Corporation Rotary hammer
US9308636B2 (en) 2012-02-03 2016-04-12 Milwaukee Electric Tool Corporation Rotary hammer with vibration dampening
US10195730B2 (en) 2012-02-03 2019-02-05 Milwaukee Electric Tool Corporation Rotary hammer
US9061355B2 (en) 2012-06-29 2015-06-23 Kennametal Inc. Tool adaptor having an integrated damping device
US9630258B2 (en) 2014-10-15 2017-04-25 Kennametal Inc Tool holder assembly with dampening elements
US20180154453A1 (en) * 2016-12-05 2018-06-07 Kennametal Inc. Eddy current vibration absorber assembly for cutting tool
US9993879B1 (en) * 2016-12-05 2018-06-12 Kennametal Inc Eddy current vibration absorber assembly for cutting tool
EP4086026A1 (de) * 2021-05-05 2022-11-09 CERATIZIT Austria Gesellschaft m.b.H. Zerspanungswerkzeug
AT17718U1 (de) * 2021-05-05 2022-12-15 Ceratizit Austria Gmbh Zerspanungswerkzeug
US20250034957A1 (en) * 2021-12-07 2025-01-30 Norce Innovation As Damping drill string vibrations
CN116237782A (zh) * 2023-03-15 2023-06-09 徐州智博机车有限公司 一种用于电机端盖的定位钻孔机构
CN116237782B (zh) * 2023-03-15 2023-11-03 徐州智博机车有限公司 一种用于电机端盖的定位钻孔机构

Also Published As

Publication number Publication date
CH541376A (de) 1973-09-15
GB1390544A (en) 1975-04-16
DE2142549B2 (de) 1975-10-02
FR2151355A5 (enrdf_load_stackoverflow) 1973-04-13
DE2142549A1 (de) 1973-03-01
CA981491A (en) 1976-01-13
PL76081B1 (enrdf_load_stackoverflow) 1975-02-28
IT964230B (it) 1974-01-21
JPS4831575A (enrdf_load_stackoverflow) 1973-04-25

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