US20050139032A1 - Work table - Google Patents

Work table Download PDF

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Publication number
US20050139032A1
US20050139032A1 US11/013,627 US1362704A US2005139032A1 US 20050139032 A1 US20050139032 A1 US 20050139032A1 US 1362704 A US1362704 A US 1362704A US 2005139032 A1 US2005139032 A1 US 2005139032A1
Authority
US
United States
Prior art keywords
work table
accordance
housing
rotary element
actuating member
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.)
Abandoned
Application number
US11/013,627
Other languages
English (en)
Inventor
Carsten Burkhardt
Hartmut Markus
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.)
Fertigungstechnik Weissenfels GmbH
Original Assignee
Fertigungstechnik Weissenfels 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34485410&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20050139032(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fertigungstechnik Weissenfels GmbH filed Critical Fertigungstechnik Weissenfels GmbH
Assigned to FERTIGUNGSTECHNIK WEISSENFELS GMBH reassignment FERTIGUNGSTECHNIK WEISSENFELS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BURKHARDT, CARSTEN, MARKUS, HARTMUT
Publication of US20050139032A1 publication Critical patent/US20050139032A1/en
Abandoned 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
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/08—Indexing equipment having means for clamping the relatively movable parts together in the indexed position
    • B23Q16/10—Rotary indexing
    • B23Q16/102—Rotary indexing with a continuous drive
    • 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
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20207—Multiple controlling elements for single controlled element
    • Y10T74/20341—Power elements as controlling elements

Definitions

  • the present invention pertains to a work table with a housing and with a rotary element mounted rotatably at the housing as well as with a locking means for fixing the particular angle of rotation position of the rotating element in relation to the housing.
  • Such a work table is disclosed, for example, in DE 202 02 998 U1.
  • This work table has a round table mounted rotatably at a housing, which is called substructure in the document. Workpieces are clamped on the round table in the usual manner in order to subject them to machining, especially cutting. Consequently, the round table is a workpiece mount arranged rotatably at the housing. The workpieces mounted on the round table can be rotated by means of the round table driven by a rotating drive into predetermined positions favorable for the particular machining step and then machined.
  • Motor-driven worm gear mechanisms were originally used as the rotating drive. These had the advantage of locking the particular angular position of the rotary element (round table) by means of a self-locking design. The worm gear mechanism was consequently also the locking means at the same time.
  • Locking means similar to those described in DE 202 02 998 U1 are disclosed in U.S. Pat. No. 6,457,383 B1 and U.S. Pat. No. 6,001,145 A.
  • DE 195 15 085 C2 shows a locking means for a belt drive. Should a drive belt break, a spring-loaded locking lever is pivoted and it engages a locking wheel as a result. The locking lever can be pivoted back and the locking abolished by a cylinder.
  • a bar or shaft is clamped by means of a clamping lever.
  • the clamping lever has a hole, in which the bar or shaft is guided. The hole becomes eccentric in relation to the bar or shaft due to the pivoting of the clamping lever, so that the bar or shaft is clamped.
  • the basic object of the present invention is to improve a work table of the type described in the introduction such that the clamping will be reliably preserved even in case of failure of the energy supply, especially the pressurizing agent supply (fail-safe behavior).
  • the work table according to the present invention is characterized in that the locking means is released when the energy supply is switched on and activated when the energy supply is switched off.
  • Hydraulic oil/fluid is used predominantly for the energy supply in machine tools, and pneumatic energy supply by means of, e.g., compressed air is used less frequently.
  • the locking means is consequently designed according to the present invention such that it fixes the rotary element in the pressureless state. If a pressurizing agent is admitted to actuating cylinders of the locking means, the locking means is released and the rotary element can be rotated. If the pressurizing agent supply fails for whatever reason, the locking means remains fully active. The rotary element cannot rotate inadvertently.
  • An additional actuating member which further boosts the locking force applied by the restoring member, is preferably provided. This would be especially suitable when the workpiece mounted on the work table is exposed to especially strong machining forces. Even though the locking force is reduced to the locking force applied solely by the restoring member in case of a failure of the rest of the actuating member, this force is sufficient to allow sufficient time for the human operator or the electronic system for an emergency shut-off of the machining, without a dangerous rotation of the workpiece mount occurring during this time.
  • actuating members are preferably actuated by pressurizing medium. Hydraulics, in particular, but also compressed air are usually available at all machine tools.
  • the suitable actuating members are especially annular pistons. These may be led on the outside around the workpiece mount and thus have the greatest possible lever arm and consequently the strongest possible locking force at a predetermined pressure.
  • the annular piston may be designed as a plastic part and press-fit into an annular groove acting as a cylinder housing, so that no separate sealing elements are necessary.
  • FIG. 1 is a vertical sectional view of a first work table having the features of the present invention
  • FIG. 2 is a horizontal sectional view of another work table having the features of the present invention.
  • FIG. 3 is a view of the work table according to FIG. 2 in a section plane rotated in relation to FIG. 2 .
  • the work table shown in FIG. 1 has a housing 10 and, as a first rotary element, a pivoting housing 11 mounted rotatably at the housing 10 .
  • a face plate 12 at which workpieces can be mounted for machining in the known manner, is mounted rotatably as an additional rotary element at the pivoting housing 11 .
  • the pivoting housing 11 is rotatable around a first pivot axis 13 in relation to the housing 10
  • the face plate 12 is rotatable around a second pivot axis 14 positioned at an angle in relation to the first pivot axis 13 in relation to the pivoting housing 11 .
  • the pivoting housing 11 is mounted at the housing 10 and the face plate 12 is mounted at the pivoting housing 11 by means of prior-art pivot bearings 15 and 16 .
  • a respective torque motor 17 and 18 is used as the rotating drive.
  • the particular angular position of the pivoting housing 1 in relation to the housing 10 can be detected by means of a measuring system 19 .
  • Another measuring system 20 is used to detect the angle of rotation position of the face plate 12 in relation to the pivoting housing 11 .
  • a locking means 21 is provided to fix the pivoting housing 11 in its angular position in relation to the housing 10 .
  • Another locking means 22 is used to fix the angular position of the face plate 12 in relation to the pivoting housing 11 .
  • the two locking means 21 , 22 have, in principle, the same design and will be described below on the basis of FIGS. 2 and 3 .
  • FIGS. 2 and 3 show another work table, namely, a round table.
  • This has a housing 23 and a face plate 24 , which is mounted at the housing 23 rotatably around the axis of rotation 25 .
  • the face plate 24 can again be fixed in relation to the housing 23 by means of a locking means 26 .
  • This locking means has a design analogous to that of the locking means 21 and 22 for the work table according to FIG. 1 , so that it is sufficient to describe below this locking means 26 only in greater detail.
  • a housing ring 27 is arranged, for example, screwed, on the housing 23 .
  • This housing ring 27 has an annular groove 28 , into which an annular piston 29 is inserted.
  • the annular piston 29 is made of a plastic and has a press fit in relation to the annular groove 28 , so that it is automatically sealed against the annular groove 28 .
  • Pressurizing agent specifically hydraulic oil, can be admitted into a pressure space 32 under the annular piston 29 via a connection hole 30 and an ascending pipe 31 .
  • the annular piston 29 is lifted out of the annular groove.
  • the annular piston 29 raises a fixed disk 33 .
  • An outer edge of a rotating disk 34 which said disk is nonrotatably connected with the face plate 24 and rotates together with same, is arranged on the inner side of the annular piston 29 under the fixed disk 33 .
  • Weights for example, in the form of a ring that lies on the fixed disk 33 and is connected with the fixed disk 33 and/or the housing ring 27 in a suitable manner, may be located on the fixed disk 33 in case of work tables in which the disks 33 and 34 are located in a plane that is sloped at a sufficient angle in relation to the force of gravity. If this solution is not sufficient or is even impossible, e.g., when the plane of the disks 33 and 34 is located in the direction of the force of gravity, it is also possible to provide restoring members.
  • FIG. 3 Another variant is shown in FIG. 3 .
  • a ring 35 is provided here on the side of the fixed disk 33 facing away from the annular housing 27 and is connected with the annular housing 27 and/or the fixed disk 33 in a suitable manner.
  • An annular groove 36 into which a second annular piston 37 is inserted, is provided in the ring 35 on the side facing the fixed disk 33 .
  • This annular piston 37 has exactly the same design as the annular piston 29 , so that the same component can be used, which minimizes the manufacturing and stocking costs.
  • the annular piston 37 is again press-fitted in relation to the annular groove 36 , so that it is sealed against the annular groove 36 .
  • a pressure space 38 above the annular piston 37 is supplied with pressurizing agent, specifically hydraulic oil, via supply holes 39 , 40 , 41 , 42 , 43 .
  • pressurizing agent specifically hydraulic oil
  • supply holes 39 , 40 , 41 , 42 , 43 are supplied with pressurizing agent, specifically hydraulic oil.
  • the supply hole 42 can be drilled only from the outside, as can be recognized from FIG. 2 . It is therefore closed by a plug 44 toward the outside.
  • the supply holes 40 and 41 are connected with one another via a grommet 45 in order to establish a sealed transition through the fixed disk 33 from the housing ring 27 to the ring 35 for the pressurizing agent supply.
  • Nonreturn valves which ensure that the pressure in the pressure space 28 continues to be maintained in case of failure of the pressurizing agent supply, are provided in the pressurizing agent line in order to achieve the desired fail-safe behavior in this variant.
  • the variant shown in FIG. 3 can be readily combined with other variants of a restoring element, especially the above-described ones, and it will thus have a clamping force-increasing effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)
  • Machine Tool Positioning Apparatuses (AREA)
  • Vending Machines For Individual Products (AREA)
US11/013,627 2003-12-15 2004-12-15 Work table Abandoned US20050139032A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10358943.0-14 2003-12-15
DE10358943A DE10358943A1 (de) 2003-12-15 2003-12-15 Werkstücktisch

Publications (1)

Publication Number Publication Date
US20050139032A1 true US20050139032A1 (en) 2005-06-30

Family

ID=34485410

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/013,627 Abandoned US20050139032A1 (en) 2003-12-15 2004-12-15 Work table

Country Status (6)

Country Link
US (1) US20050139032A1 (de)
EP (1) EP1543916B2 (de)
AT (1) ATE349294T1 (de)
CA (1) CA2500868A1 (de)
DE (2) DE10358943A1 (de)
ES (1) ES2279298T5 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115338688A (zh) * 2022-08-03 2022-11-15 无锡左右精密机械有限公司 用于车床加工压盘球面孔的自动分度液压工装

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ2007572A3 (cs) * 2007-08-22 2009-03-04 Usporádání pohonu pracovního stroje, zejména pro pohon obrábecího stroje
DE102007044053A1 (de) * 2007-09-14 2009-03-19 Hema Maschinen- Und Apparateschutz Gmbh Klemm- und Bremssystem
DE102008006346A1 (de) * 2008-01-28 2009-07-30 Maschinenfabrik Berthold Hermle Ag Bearbeitungszentrum, insbesondere zur Bohr-, Fräs- und Drehbearbeitung eines Werkstücks
DE102008032894A1 (de) 2008-07-14 2010-01-21 Franz Kessler Gmbh Werkzeugmaschinenkomponente mit Drehantrieb, insbesondere Drehkopf für Motorspindeln oder Drehtisch für Werkstücke
DE102019005799A1 (de) 2019-08-17 2021-02-18 Sauter Feinmechanik Gmbh Drehtisch

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176595A (en) * 1963-05-22 1965-04-06 Galland Henning Mfg Company Plastic piston assembly
US3718055A (en) * 1969-12-11 1973-02-27 Fischer Brodbeck Gmbh Rotary indexing machine
US3745890A (en) * 1971-06-09 1973-07-17 N Costarella Ringless piston
US3786721A (en) * 1971-09-09 1974-01-22 Prod Machine Co Clamp for rotary tables
US4353271A (en) * 1980-05-15 1982-10-12 A.G. Davis Gage And Engineering Co. Multiple position rotary index table
US4577847A (en) * 1983-04-12 1986-03-25 Schedwin Sven Erik Clamping device
US5239892A (en) * 1990-08-27 1993-08-31 Mitutoyo Corporation Rotating device
US5862718A (en) * 1995-04-20 1999-01-26 Kiesling; Jeff L. Indexing table
US6001145A (en) * 1996-11-01 1999-12-14 Clinix Gmbh Air purification apparatus
US6457383B1 (en) * 1999-09-28 2002-10-01 Deckel Maho Pfronten Gmbh Rotating or swiveling device of a machine tool
US6669416B2 (en) * 2001-02-02 2003-12-30 Cytec Zylindertechnik Gmbh Driving head for the numerically controlled setting movements of a tool spindle or workpiece table around at least one axis of rotation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628677C2 (de) † 1976-06-25 1982-09-02 Hermann Rückle KG, 7300 Esslingen Rundschaltvorrichtung
DE4009165A1 (de) † 1990-03-22 1991-09-26 Gottlieb Peiseler Gmbh & Co Kg Werkzeugmaschine
DE4214947A1 (de) * 1992-05-06 1993-11-11 Walter Kobler Klemmvorrichtung zur Arretierung eines axial verschiebbaren oder drehbaren Maschinenteils
DE19515085C2 (de) * 1995-04-25 2000-01-20 Hermle Berthold Maschf Ag Absenksperre für einen vorzugsweise vertikalen Schlitten einer Werkzeugmaschine
DE20202998U1 (de) * 2002-02-26 2002-05-02 Deckel Maho Pfronten Gmbh Werkstücktisch zur Fräs- und Drehbearbeitung

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176595A (en) * 1963-05-22 1965-04-06 Galland Henning Mfg Company Plastic piston assembly
US3718055A (en) * 1969-12-11 1973-02-27 Fischer Brodbeck Gmbh Rotary indexing machine
US3745890A (en) * 1971-06-09 1973-07-17 N Costarella Ringless piston
US3786721A (en) * 1971-09-09 1974-01-22 Prod Machine Co Clamp for rotary tables
US4353271A (en) * 1980-05-15 1982-10-12 A.G. Davis Gage And Engineering Co. Multiple position rotary index table
US4577847A (en) * 1983-04-12 1986-03-25 Schedwin Sven Erik Clamping device
US5239892A (en) * 1990-08-27 1993-08-31 Mitutoyo Corporation Rotating device
US5862718A (en) * 1995-04-20 1999-01-26 Kiesling; Jeff L. Indexing table
US6001145A (en) * 1996-11-01 1999-12-14 Clinix Gmbh Air purification apparatus
US6457383B1 (en) * 1999-09-28 2002-10-01 Deckel Maho Pfronten Gmbh Rotating or swiveling device of a machine tool
US6669416B2 (en) * 2001-02-02 2003-12-30 Cytec Zylindertechnik Gmbh Driving head for the numerically controlled setting movements of a tool spindle or workpiece table around at least one axis of rotation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115338688A (zh) * 2022-08-03 2022-11-15 无锡左右精密机械有限公司 用于车床加工压盘球面孔的自动分度液压工装

Also Published As

Publication number Publication date
EP1543916B2 (de) 2011-04-06
EP1543916A1 (de) 2005-06-22
DE10358943A1 (de) 2005-07-14
CA2500868A1 (en) 2005-06-15
ES2279298T3 (es) 2007-08-16
ATE349294T1 (de) 2007-01-15
DE502004002433D1 (de) 2007-02-08
ES2279298T5 (es) 2011-10-18
EP1543916B1 (de) 2006-12-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FERTIGUNGSTECHNIK WEISSENFELS GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BURKHARDT, CARSTEN;MARKUS, HARTMUT;REEL/FRAME:016112/0782

Effective date: 20041215

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION