WO2002014012A1 - Table a mouvements croises pour la realisation de deplacements dans un systeme de coordonnees bidimensionnel - Google Patents

Table a mouvements croises pour la realisation de deplacements dans un systeme de coordonnees bidimensionnel Download PDF

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Publication number
WO2002014012A1
WO2002014012A1 PCT/EP2001/009342 EP0109342W WO0214012A1 WO 2002014012 A1 WO2002014012 A1 WO 2002014012A1 EP 0109342 W EP0109342 W EP 0109342W WO 0214012 A1 WO0214012 A1 WO 0214012A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
air
base body
bodies
cross table
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.)
Ceased
Application number
PCT/EP2001/009342
Other languages
German (de)
English (en)
Inventor
Dirk Schmidt
Klaus Martin
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.)
LAT SUHL AG
Original Assignee
LAT SUHL AG
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 LAT SUHL AG filed Critical LAT SUHL AG
Priority to AU84011/01A priority Critical patent/AU8401101A/en
Publication of WO2002014012A1 publication Critical patent/WO2002014012A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • 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
    • B23Q1/38—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 using fluid bearings or fluid cushion supports
    • 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
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/62—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides
    • B23Q1/621—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides a single sliding pair followed perpendicularly by a single sliding pair
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/02—Sliding-contact bearings
    • F16C29/025—Hydrostatic or aerostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators

Definitions

  • the present invention relates to a cross table for providing movements in a two-dimensional coordinate system with a fixed base body, a lower barrel body, which is slidably mounted on the base body in a first direction, an upper barrel body, which is slidably supported on the lower barrel body in a second direction is, and with at least one drive system, which causes the displacement of the two barrel bodies.
  • cross table is to be used to implement a two-dimensional movement.
  • Such cross tables usually have two running bodies which move in mutually perpendicular directions. It is also known to support the running bodies with air bearings in order to keep the friction losses low. If a barrel slides on an air bearing, lateral guidance in the direction of movement is also required. In order to avoid undesirable torques, which can occur in particular at high acceleration values, the running bodies are usually supported on both sides. However, a fixed bearing can only be used on one side, while a spring-loaded bearing is required on the other side to compensate for temperature-related material expansion.
  • a cross table bearing which has a base body and two movable running bodies that are movable in different directions.
  • the use of parallel roller rails results in a relatively precise mounting, but also a complicated structure with a large overall height and the resulting tilting moments.
  • DE 33 47 282 AI shows an aerostatic bearing device that enables movement in one direction.
  • the main body and the barrel body are made of granite.
  • the barrel is composed of several solid blocks, which greatly increase the overall mass and cancel the homogeneity of the barrel.
  • the temperature-dependent length differences increase again and the dynamic properties are no longer suitable for fast movements.
  • both the base body and the two barrel bodies consist of the same hard rock material and are each formed in one piece, in which the bearing between the base body and the first barrel body and between the first and the second barrel body is formed by air bearings, the air bearings comprising air nozzles which are integrated in the sliding surfaces of the base body and / or the running body.
  • Hard rock has a relatively small coefficient of expansion (eg granite: ⁇ «10 " 6 K "1 ). However, even those linear expansions that can occur in spite of the low expansion coefficient with larger temperature fluctuations do not lead to those known from the prior art.
  • the base body and the two barrel bodies are each formed in one piece from the hard rock material. In this way, inhomogeneities are avoided and no connecting sections between individual rock blocks are necessary. In other embodiments, however, it is also conceivable that individual rock sections are glued together.
  • the two running bodies are table-shaped and are mounted on both sides in fixed bearings along the direction of movement. It is particularly expedient if air bearings are used which are integrated directly into the base body and / or the running body. For example, this is done by arranging air nozzles in the sliding surfaces of the running bodies, which are arranged on the side surfaces and undersides. The latter measure keeps the height of the respective running body low, since, in contrast to solutions known from the prior art, the air bearings are not attached to the running body as independent elements and protrude beyond its surface. The tilting moments that occur during acceleration can thus be kept very small.
  • An advantageous embodiment is characterized in that each of the two running bodies is assigned an independent drive system.
  • measuring systems are preferably arranged with which the positions and / or the speeds and / or the accelerations of the running bodies can be determined.
  • the drive and measuring systems are expediently coupled to a control unit which evaluates the corresponding data and supplies the required signals to the drive systems.
  • Figure 1 is a simplified top view of a cross table according to the invention.
  • Figure 2 shows the cross table in a simplified sectional view from the front.
  • 4 shows the cross table in a view from the front with a first measuring system
  • 5 shows the cross table in a view from the side with a second measuring system
  • Fig. 6 is a sectional detailed view of an integrated air bearing.
  • Fig. 1 shows a cross table in a simplified view from above.
  • This cross table is used to provide whose position is defined by the xy coordinates shown in FIG. 1.
  • the cross table has a fixed base body 1, a lower barrel body 2 and an upper barrel body 3.
  • the base body 1, the lower barrel body 2 and the upper barrel body 3 consist of the same hard rock material. These elements are preferably formed in one piece from this material.
  • the lower barrel body 2 is movable in the x direction, a lateral longitudinal guide being formed by a guide section 4 of the base body 1.
  • Shock absorbers 5 are also arranged on the lower barrel body 2, which allow a damped end stop when the end position is reached in the positive or negative x-direction.
  • the upper barrel body 3 is seated on the lower barrel body 2 and is movable thereon in the y direction.
  • the upper running body 3 is also guided laterally in the direction of movement, the corresponding guide sections being provided by the lower running body 2.
  • further shock absorbers 6 are provided which dampen the end stop when the upper running body 3 moves.
  • Fig. 2 shows the cross table in a sectional view from the front.
  • the sectional view clearly shows the monolithic structure of the base body 1, the lower barrel body 2 and the upper barrel body 3.
  • the lower barrel body 2 has a table-shaped design, on the one hand to provide a sufficiently large usable area on the top and on the other hand to have the necessary stability.
  • the under barrel 2 is in the guide sections 4 of the
  • Base body 1 supported by air bearings. There are several in the lower and side sliding surfaces of the lower barrel 2 first lower air bearings 7 and first lateral air bearings 8 are formed on the respective side of the lower running body 2.
  • Means are preferably also provided with which a vacuum preload of the air bearings can be generated.
  • a vacuum preload stiffens the vertically acting air bearings in addition to the effect of gravity.
  • the two sides of the lower barrel body 2, which extend in the direction of movement, can be stored in fixed bearings in this way, since due to the hard rock materials used, different lengths of the base body and the lower barrel body must not be expected.
  • An x drive system 9 which is designed here as a linear drive, is also shown schematically in FIG. 2.
  • the special shape of the drive is not important.
  • the drive is adapted to the respective application in terms of the desired speeds and acceleration values, as well as the forces to be applied.
  • Fig. 3 shows the cross table in a sectional view from the side. It can be clearly seen in this illustration that the upper barrel 3 is mounted in the lower barrel 2 in a manner which corresponds to the mounting of the lower barrel 2 in the base body 1. With respect to the direction of movement of the upper running body 3 (y direction), second lower air bearings 11 and second lateral air bearings 12 are arranged on the longitudinal sides. Here too, storage can take place in fixed bearings, since the upper running body 3 is made of the same material
  • the upper barrel 3 is also table-shaped in order to provide a usable surface on its upper side and to meet the static requirements. For example, a workpiece can be positioned on the top of the upper barrel 3, which is to be moved into different positions during machining.
  • an independent y-drive system 13 serves to drive the upper barrel body 3.
  • the use of the vacuum preload in conjunction with the air bearings has a positive effect. This allows the center of gravity to be moved out of the bearing, since the tilting moments that occur in such a case are compensated for by the vacuum preload.
  • Fig. 4 shows the cross table again in a view from the front. It is expedient to arrange a first measuring system 15 with which the movement or the position of the lower running body 2 can be monitored.
  • the measuring system must be arranged as close as possible to the drive system in order to avoid control problems.
  • Fig. 5 shows the cross table in a view from the side.
  • a second measuring system 16 can be seen, which monitors the movement or the position of the upper barrel.
  • a flexible supply line 17 is provided, which both provides electrical energy and serves to supply the compressed air to the air bearings.
  • 6 shows a sectional detailed view of the lower barrel body 2, the integrated air bearings being clearly visible.
  • the first lower air bearing 7 is formed by a nozzle insert 18 and a screw-in nozzle 19 screwed into it. At the back, the screw-in nozzle is connected to a compressed air supply unit (e.g. with a hose). Additional structures are no longer required.
  • the air bearing then forms directly between the lower barrel body and the base body.
  • the side air bearing 8 is constructed in the same way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Machine Tool Units (AREA)

Abstract

L'invention concerne une table à mouvements croisés pour la réalisation de déplacements dans un système de coordonnées bidimensionnel, qui comprend: un corps de base (1) fixe; un corps mobile inférieur (2), qui est monté sur le corps de base de façon à pouvoir se déplacer dans une première direction (x); un corps mobile supérieur (3), qui est monté sur le corps mobile inférieur de façon à pouvoir se déplacer dans une seconde direction (y); et au moins un système d'entraînement (9, 13), qui provoque le déplacement des deux corps mobiles. Selon l'invention, le corps de base (1) et les deux corps mobiles (2, 3) sont constitués de la même roche dure.
PCT/EP2001/009342 2000-08-14 2001-08-13 Table a mouvements croises pour la realisation de deplacements dans un systeme de coordonnees bidimensionnel Ceased WO2002014012A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU84011/01A AU8401101A (en) 2000-08-14 2001-08-13 Mechanical stage for effecting displacements in a two-dimensional coordinate system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10040277A DE10040277C2 (de) 2000-08-14 2000-08-14 Kreuztisch zur Bereitstellung von Bewegungen in einem zweidimensionalen Koordinatensystem
DE10040277.1 2000-08-14

Publications (1)

Publication Number Publication Date
WO2002014012A1 true WO2002014012A1 (fr) 2002-02-21

Family

ID=7652791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/009342 Ceased WO2002014012A1 (fr) 2000-08-14 2001-08-13 Table a mouvements croises pour la realisation de deplacements dans un systeme de coordonnees bidimensionnel

Country Status (3)

Country Link
AU (1) AU8401101A (fr)
DE (1) DE10040277C2 (fr)
WO (1) WO2002014012A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004063692B3 (de) * 2004-12-28 2006-05-11 Georg-August-Universität Göttingen Positioniereinrichtung
CN100391668C (zh) * 2005-10-02 2008-06-04 大赢数控设备(深圳)有限公司 Pcb钻孔机y轴结构
DE102008013216A1 (de) * 2008-03-07 2009-09-10 Scheppach Fabrikation Von Holzbearbeitungsmaschinen Gmbh Werkzeugmaschine
DE102008017388B4 (de) 2008-04-02 2011-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung zum Bewegen eines Werkstücks oder eines Werkzeugs sowie Kreuztisch

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4234175A (en) * 1977-12-20 1980-11-18 Canon Kabushiki Kaisha High precision positioning device
US4505464A (en) * 1983-03-28 1985-03-19 Anorad Corporation High precision workpiece positioning table
DE3347282A1 (de) * 1983-12-28 1985-07-11 Werner 6140 Bensheim Kreuzer Aerostatische lagervorrichtung
US4571799A (en) * 1980-12-22 1986-02-25 Anorad Corporation Method for producing air bearing pads for positioning table
US4596067A (en) * 1983-02-17 1986-06-24 Prt Pluritec Italia S.P.A. Drilling machine for boards, particularly of printed circuits
US4922603A (en) * 1986-04-18 1990-05-08 Dynamotion Corporation Drilling tool for very small diameter openings and container therefor
EP0652075A2 (fr) * 1993-09-14 1995-05-10 Eduard Huber Management Ag Dispositif d'usinage de pièces
US5456134A (en) * 1992-08-12 1995-10-10 U.S. Philips Corporation Magnetic transmission mechanism and applications thereof
EP0845325A1 (fr) * 1996-12-02 1998-06-03 Huber Engineering AG Dispositif pour l'usinage de pièces
DE19833083A1 (de) * 1998-07-23 2000-01-27 Kuchenhart Friedrich Wilhelm Bahnführungsvorrichtung, insbesondere für Koordinatenmeßmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6808097U (de) * 1968-11-21 1969-05-29 Heinz Schmoll Fa Ing Werkzeugmaschine mit kreuztischlagerung

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4234175A (en) * 1977-12-20 1980-11-18 Canon Kabushiki Kaisha High precision positioning device
US4571799A (en) * 1980-12-22 1986-02-25 Anorad Corporation Method for producing air bearing pads for positioning table
US4596067A (en) * 1983-02-17 1986-06-24 Prt Pluritec Italia S.P.A. Drilling machine for boards, particularly of printed circuits
US4505464A (en) * 1983-03-28 1985-03-19 Anorad Corporation High precision workpiece positioning table
DE3347282A1 (de) * 1983-12-28 1985-07-11 Werner 6140 Bensheim Kreuzer Aerostatische lagervorrichtung
US4922603A (en) * 1986-04-18 1990-05-08 Dynamotion Corporation Drilling tool for very small diameter openings and container therefor
US5456134A (en) * 1992-08-12 1995-10-10 U.S. Philips Corporation Magnetic transmission mechanism and applications thereof
EP0652075A2 (fr) * 1993-09-14 1995-05-10 Eduard Huber Management Ag Dispositif d'usinage de pièces
EP0845325A1 (fr) * 1996-12-02 1998-06-03 Huber Engineering AG Dispositif pour l'usinage de pièces
DE19833083A1 (de) * 1998-07-23 2000-01-27 Kuchenhart Friedrich Wilhelm Bahnführungsvorrichtung, insbesondere für Koordinatenmeßmaschinen

Also Published As

Publication number Publication date
DE10040277A1 (de) 2002-03-07
AU8401101A (en) 2002-02-25
DE10040277C2 (de) 2003-08-28

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