US20020003329A1 - Positioning and clamping system - Google Patents

Positioning and clamping system Download PDF

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Publication number
US20020003329A1
US20020003329A1 US09/895,203 US89520301A US2002003329A1 US 20020003329 A1 US20020003329 A1 US 20020003329A1 US 89520301 A US89520301 A US 89520301A US 2002003329 A1 US2002003329 A1 US 2002003329A1
Authority
US
United States
Prior art keywords
pallet
support
conical
cone
tapered sleeve
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
US09/895,203
Other languages
English (en)
Inventor
Hinrich Stave
Friedrich Windel
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.)
Grob Werke Dr hc mult Dipl Ing Burkhart Grob eK
Original Assignee
Grob Werke Dr hc mult Dipl Ing Burkhart Grob eK
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 Grob Werke Dr hc mult Dipl Ing Burkhart Grob eK filed Critical Grob Werke Dr hc mult Dipl Ing Burkhart Grob eK
Assigned to GROB-WERKE DR. H.C. MULT. DIPL.-ING. BURKHART GROB E.K. reassignment GROB-WERKE DR. H.C. MULT. DIPL.-ING. BURKHART GROB E.K. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WINDEL, FRIEDRICH, STAVE, HINRICH
Publication of US20020003329A1 publication Critical patent/US20020003329A1/en
Priority to US10/390,174 priority Critical patent/US6918578B2/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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
    • 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
    • B23Q1/0063—Connecting non-slidable parts of machine tools to each other
    • B23Q1/0072—Connecting non-slidable parts of machine tools to each other using a clamping opening for receiving an insertion bolt or nipple

Definitions

  • the present invention relates to a positioning and clamping system which is suitable in particular for positioning and clamping a workpiece-carrying pallet on a pallet receiving table.
  • the system comprises at least two conical supports arranged spaced from each other on the pallet receiving table and at least two tapered sleeves, adapted to cooperate with the conical supports, which are connected to the pallet on the side which is to be located on the table.
  • the pallet to be clamped is positioned and securely clamped with the workpiece located thereon to a machining table or a pallet receiving table which can be located at or on a machine tool.
  • a machining table or a pallet receiving table which can be located at or on a machine tool.
  • Such positioning must be able not only to take place extremely precisely as the exact machining of the workpiece is dependent on the precise positioning, but it must also be easy to carry out, like the clamping of the pallet, wherein it should be noted that the region of the pallet receiving table is generally heavily soiled by shavings and lubricating oil or liquid coolant.
  • the advantage of using a pallet for clamping a workpiece is that the pallet has consistently uniform connection geometry with respect to the workpiece which is replaced, and therefore very quick positioning and clamping of the workpiece relative to the working spindles of the machine tools is possible owing to this consistent connection geometry.
  • the pallets can have a size of, for example 800 ⁇ 800 mm to 800 ⁇ 1000 mm.
  • the machining or pallet receiving table can be designed as a circular table which has a pallet mount which is rotatably mounted in the substantially vertically oriented axis of rotation.
  • the present invention provides a pallet receiving table with at least two conical supports and the tapered sleeves on a pallet adapted to cooperate therewith, wherein the at least one cone angle of one of said conical supports and said tapered sleeve adapted to cooperate therewith has a suitable angle size to introduce a self-locking connection between said support and said tapered sleeve, upon cooperation thereof.
  • the conical support and the tapered sleeve adapted to cooperate therewith has a two-stage conical form with, seen from the cone tip, a first and second cone angle, the second cone angle having a smaller angle size than the first cone angle.
  • the second cone angle of the tapered sleeve can simultaneously be designed as an annular projection in the direction of the table, in other words at the bottom end of the tapered sleeve, provided the table is arranged horizontally, and the conical support has, as a counterpart, an annular planar rest cooperating therewith.
  • a second conical support can have a reduced centering area of support of a type such that the external surface of the cone of the support has longitudinally extending interruptions, in other words can be designed, for example, as a sword bolt.
  • a sword bolt supports a tapered sleeve in the peripheral direction only and this only in places.
  • air can be supplied via a supply system provided for this purpose in a gap between the support and the sleeve, during positioning and clamping of the pallet to the pallet receiving table, in order to clean the cone walls of the tapered sleeve and the conical support, of shavings and impurities with the air brushing along the walls and in order to check the cooperation of support and sleeve by means of the quantities of inflowing air.
  • FIG. 1 is a cross-sectional view of a support together with the tapered sleeve cooperating therewith, wherein in the left-hand half, viewed from the center line, a design according to the state of the art is shown and in the right-hand half, a design according to the invention;
  • FIG. 2 is a schematic plan view of a pallet receiving table, of an embodiment of the positioning and clamping system according to the invention.
  • the invention is used not exclusively, but is used preferably, for clamping and positioning a workpiece-bearing pallet on a pallet receiving table with at least two conical supports arranged on the pallet receiving table and at least two tapered sleeves adapted to cooperate with the conical supports, which sleeves are connected to the pallet on the side which is to be located on the table.
  • FIG. 1 shows the bottom region of a pallet 1 which is located on supports 4 which are arranged on a pallet receiving table 2 .
  • the bottom of the pallet is equipped with a sleeve, preferably a tapered sleeve 3 , in which a journal 9 is arranged which is grasped and tightened by a claw-like clamping tong 6 a which is provided in the support 4 of the pallet receiving table.
  • the embodiment according to the state of the art depicted on the left-hand side comprises of a cone or truncated cone 4 and a tapered sleeve 3 cooperating therewith.
  • the tapered sleeve rests on the truncated cone 4 with the pallet bottom part 1 , wherein the half of the cone angle ⁇ is approximately 30° and consequently the entire cone angle is 60° in size.
  • Location of the tapered sleeve 3 on the conical support primarily takes place at the cone external surfaces of the conical support as can be seen from the left-hand half of FIG. 1.
  • These cone angles are preferably of an angle size of 1° to 30°, in particular approximately 15°.
  • An annular projection 5 which, in this case, simultaneously forms the second cone stage with the cone angle ⁇ 2 of the conical support or of the tapered sleeve is also formed on the bottom, in other words table side, end of the tapered sleeve 3 which in the clamped state rests on an annular planar rest 6 of the support 4 .
  • the above-mentioned gap between the annular projection 5 and the annular planar rest 6 closes as a result.
  • the planar rest 6 which is itself height adjustable (not shown), therefore determines the extent of the expansion or compression of the tapered sleeve 3 or of the conical support 4 required. If the planar rest 6 is arranged more deeply then a greater expansion or compression takes place. It can be seen from this that, owing to the interaction of a planar system, as provided by the planar rest 6 and the annular projection 5 , and the cone-shaped system, limited expansion/compression of the tapered sleeve/conical support is possible and therefore a shrink fit of the tapered sleeve on the conical support is provided. This shrink fit means that the connection between tapered sleeve and the conical support can be re-released owing to the elastic deformation.
  • Air or any other gaseous medium can be conveyed to a gap 7 between the support 4 and the sleeve 3 cooperating therewith or the journal 5 connected to the sleeve via a feed line 8 , which air escapes upon joining of the tapered sleeve 3 to the conical support 4 via the cone external surfaces and the faces of the planar rest 6 , and cleans these as a result. Consequently, a cleaning effect of the support and the tapered sleeves cooperating therewith is achieved during positioning of the pallet 1 on the pallet receiving table 2 .
  • this air can serve to control the cooperation of support and tapered sleeve; in other words to check, for example, for the presence of a tapered sleeve on a conical support by means of pressure monitoring of the air supplied.
  • the pallet receiving table can be formed as a circular table with a rotating pallet mount, the axis of rotation of which points in the direction of the table surface normal lines.
  • FIG. 2 shows in a plan view a pallet receiving table with four supports distributed over the table face.
  • the support 4 corresponds in this case to a support according to the invention already described in more detail in conjunction with FIG. 1.
  • the support 10 also has the shape of a cone, but with a cone external surface which has longitudinally extending interruptions 11 , in other words interruptions which extend from an (imaginary) cone tip to the cone foot.
  • a cone with an external surface which, for example, can consist of four portions, is produced by such a reduced centering rest.
  • a design in the shape of a sword bolt is also possible.
  • the interruptions can be created by oblique milling of the external surfaces.
  • a support of this type therefore bears a tapered sleeve cooperating therewith only in the peripheral direction and is arranged diagonally to the support 4 .
  • the combination of these two supports 4 and 10 leads to a predetermined peripheral play of the pallet 1 with respect to the pallet receiving table of approximately 5 ⁇ m and therefore jamming of the pallet on the pallet receiving table in the diagonals during or after the clamping process is not possible.
  • the two remaining supports 12 are characterised by an annular planar rest which cooperates with an annular projection on the tapered sleeve similar to the two supports first mentioned. These supports also have conical portions which, however, do not connect during the clamping process with their external surfaces to the internal surfaces of the tapered sleeves cooperating therewith, rather, a gap is maintained between the support and tapered sleeve even during the clamping process, so that the cone external surfaces of the conical support do not act as bearing faces.
  • the annular planar rest acts as a support for the tapered sleeve and the pallet 1 connected thereto in the direction acting perpendicular to the table surface.
  • Each of the supports 4 , 10 and 12 is equipped with a claw-like clamping tong 6 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Feeding Of Workpieces (AREA)
  • Vehicle Body Suspensions (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Body Structure For Vehicles (AREA)
US09/895,203 2000-06-30 2001-07-02 Positioning and clamping system Abandoned US20020003329A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/390,174 US6918578B2 (en) 2000-06-30 2003-03-18 Positioning and clamping system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10031103A DE10031103A1 (de) 2000-06-30 2000-06-30 Positionierungs- und Spannsystem
DE10031103.2 2000-06-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/390,174 Continuation US6918578B2 (en) 2000-06-30 2003-03-18 Positioning and clamping system

Publications (1)

Publication Number Publication Date
US20020003329A1 true US20020003329A1 (en) 2002-01-10

Family

ID=7646860

Family Applications (2)

Application Number Title Priority Date Filing Date
US09/895,203 Abandoned US20020003329A1 (en) 2000-06-30 2001-07-02 Positioning and clamping system
US10/390,174 Expired - Fee Related US6918578B2 (en) 2000-06-30 2003-03-18 Positioning and clamping system

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/390,174 Expired - Fee Related US6918578B2 (en) 2000-06-30 2003-03-18 Positioning and clamping system

Country Status (5)

Country Link
US (2) US20020003329A1 (de)
EP (1) EP1166957B1 (de)
AT (1) ATE246070T1 (de)
DE (2) DE10031103A1 (de)
ES (1) ES2203567T3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1473111A1 (de) * 2003-04-28 2004-11-03 GROB-Werke Burkhart Grob e.K. Spannvorrichtung
CN103267051A (zh) * 2013-06-03 2013-08-28 济南二机床集团有限公司 数控机床附件头快速定位连接结构及其方法
CN103481075A (zh) * 2013-09-23 2014-01-01 苏州江源精密机械有限公司 一种附件头拉紧装置
CN116989634A (zh) * 2023-09-27 2023-11-03 万向钱潮股份公司 一种轴颈位置度检测用定位工装及其使用方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI1595641T1 (sl) * 2004-04-22 2008-08-31 Erowa Ag Vpenjalna naprava z vpenjalno glavo in paleto, ki jo je mogoče nanjo ločljivo pritrditi
DE102004046469B4 (de) * 2004-09-24 2007-07-26 Audi Ag Vorrichtung zum Justieren eines Werkstückes
DE502008000432D1 (de) * 2007-10-22 2010-04-22 Erowa Ag Spanneinrichtung mit einem Spannfutter zum lösbaren Fixieren eines Werkstückträgers
DE102008005131B4 (de) 2008-01-18 2009-12-17 Maschinenfabrik Berthold Hermle Ag Verfahren und Vorrichtung zum Erkennen einer Werkstückpalette oder eines Werkstückes auf dem schwenkbaren Werkstücktisch einer Werkzeugmaschine
DE202008012197U1 (de) 2008-09-12 2010-02-18 Niles-Simmons Industrieanlagen Gmbh Vorrichtung zum Wechseln von Paletten an einer Werkzeugmaschine
JP6144523B2 (ja) * 2013-04-03 2017-06-07 パスカルエンジニアリング株式会社 位置決め装置
DE102020101222A1 (de) 2020-01-20 2021-07-22 MBL Maschinenbau Leipzig GmbH Spanneinrichtung zum Spannen von Werkstücken und Werkstückträgern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2502302C3 (de) * 1975-01-21 1981-07-09 Digitron AG, Brügg, Bern Transportvorrichtung für Paletten
DE3729601C1 (de) * 1987-09-04 1988-10-27 Erowa Ag Vorrichtung zum Aufspannen eines Werkstueckes oder Werkzeuges
US4818171A (en) * 1987-10-22 1989-04-04 Caterpillar Industrial Inc. Pallet transferring arrangement and method
DE9405030U1 (de) * 1994-03-24 1994-05-26 Manfred Föhrenbach GmbH, 79843 Löffingen Palettenspannsystem
DE19609371C2 (de) * 1996-02-29 1997-05-07 Hohenstein Vorrichtungsbau Palette für Bearbeitungszentren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1473111A1 (de) * 2003-04-28 2004-11-03 GROB-Werke Burkhart Grob e.K. Spannvorrichtung
US20050001128A1 (en) * 2003-04-28 2005-01-06 Burkhart Grob Clamping device
CN103267051A (zh) * 2013-06-03 2013-08-28 济南二机床集团有限公司 数控机床附件头快速定位连接结构及其方法
CN103481075A (zh) * 2013-09-23 2014-01-01 苏州江源精密机械有限公司 一种附件头拉紧装置
CN116989634A (zh) * 2023-09-27 2023-11-03 万向钱潮股份公司 一种轴颈位置度检测用定位工装及其使用方法

Also Published As

Publication number Publication date
EP1166957A1 (de) 2002-01-02
DE10031103A1 (de) 2002-01-10
EP1166957B1 (de) 2003-07-30
US20030227120A1 (en) 2003-12-11
US6918578B2 (en) 2005-07-19
ES2203567T3 (es) 2004-04-16
ATE246070T1 (de) 2003-08-15
DE50100432D1 (de) 2003-09-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: GROB-WERKE DR. H.C. MULT. DIPL.-ING. BURKHART GROB

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STAVE, HINRICH;WINDEL, FRIEDRICH;REEL/FRAME:011960/0409;SIGNING DATES FROM 20010529 TO 20010531

STCB Information on status: application discontinuation

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