DE3910576C1 - Apparatus for setting the bearing prestress at a shaft bearing arrangement, in particular for machine tools - Google Patents
Apparatus for setting the bearing prestress at a shaft bearing arrangement, in particular for machine toolsInfo
- Publication number
- DE3910576C1 DE3910576C1 DE3910576A DE3910576A DE3910576C1 DE 3910576 C1 DE3910576 C1 DE 3910576C1 DE 3910576 A DE3910576 A DE 3910576A DE 3910576 A DE3910576 A DE 3910576A DE 3910576 C1 DE3910576 C1 DE 3910576C1
- Authority
- DE
- Germany
- Prior art keywords
- pressure
- bearing
- shaft
- controller
- hydraulic fluid
- 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 - Fee Related
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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller 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
- B23Q1/262—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 with means to adjust the distance between the relatively slidable members
- B23Q1/265—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 with means to adjust the distance between the relatively slidable members between rotating members
-
- 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
- B23Q1/28—Means for securing sliding members in any desired position
- B23Q1/287—Means for securing sliding members in any desired position using a hydraulically controlled membrane acting directly upon a sliding member
-
- 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 build up of machine tools, e.g. spindles, slides, actuators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Support Of The Bearing (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Einstellen der Lagervorspannung an einer Wellenlagerung insbeson dere für Werkzeugmaschinen, mit mindestens einem einen Außen- und einen Innenring aufweisenden Wälzlager, des sen Vorspannung durch eine auf den Außen- oder Innen ring des Wälzlagers einwirkende Druckflüssigkeit in Ab hängigkeit von der Drehzahl der Welle veränderbar ist, wobei ein von einem Drehzahlaufnehmer geliefertes, der Belastung der Welle proportionales Signal den Druck der dem Wälzlager zugeführten Druckflüssigkeit bestimmt. The invention relates in particular to a device for adjusting the bearing preload on a shaft bearing for machine tools, with at least one Rolling bearing and an inner ring, the pretension by one on the outside or inside Ring of the rolling bearing acting in Ab depending on the speed of the shaft, one supplied by a speed sensor, the Signal load proportional to the pressure of the shaft the hydraulic fluid supplied to the roller bearing.
Die Möglichkeit, eine solche Vorrichtung für eine Wellenlagerung im vorstehenden Sinne zu konzipieren, ist im DE-GM 83 04 587 angedeu tet, ohne daß in dieser Druckschrift jedoch eine den praktischen Bedürfnissen gerecht werdende Lösung offen bart ist.The possibility of such a device for a shaft bearing in the above To design the senses is suggested in DE-GM 83 04 587 tet, but without one in this document solution that meets practical needs is beard.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung für eine Wellenlagerung der in Betracht gezogenen Art zu schaffen, die auf einfache, aber sichere Weise eine Veränderung der Steifigkeit des Lagers in Abhängigkeit von der Belastung der Welle ermöglicht.The invention is based on the object a device for a shaft bearing of the type under consideration create one in a simple but safe way Change in the stiffness of the bearing depending from the load on the shaft.
Diese Aufgabe wird in Verbindung mit den Oberbegriffsmerkmalen erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst.This task is in connection with the generic features according to the invention by the features of the characterizing part of claim 1 solved.
Die erfindungsgemäße Vorrichtung zeichnet sich durch hohe Betriebssicherheit und Regelgenauigkeit bei ange messener Regelgeschwindigkeit aus. Sie eignet sich ins besondere für den Einsatz in Fällen, in denen häufige Änderungen der Wellendrehzahlen beispielsweise infolge von sich abwechselnden Schrupp- und Feinbearbeitungen von Werkstücken zu erwarten sind. Der Herstellungsauf wand und der Platzbedarf bleiben in vertretbaren Grenzen.The device according to the invention is characterized by high operational reliability and control accuracy with measured control speed. It is suitable for special for use in cases where frequent Changes in shaft speeds, for example, as a result of alternating roughing and fine machining of workpieces are to be expected. The manufacturing order wall and space requirements remain within reasonable limits.
Ausgestaltungen im Rahmen der Erfindung ergeben sich aus den Unteransprüchen 2 bis 5.Embodiments result in the context of the invention resulting from subclaims 2 to 5.
Die Erfindung wird in folgendem anhand des in der Zeichnung schematisch dargestellten Blockschaubildes näher erläutert.The invention is based on the in the following Drawing schematically illustrated block diagram closer explained.
In der Figur ist 1 eine von der Spindel einer Werkzeug maschine gebildete Welle, die in zwei Wälzlagern 2 und 3 gelagert ist. Am vorderen Ende der Welle 1 ist ein Futter 4 angeordnet, das unter der Einwirkung einer Ra dialkraft 5 steht. Die Steifigkeit des Wälzlagers 2 läßt sich durch Einwirkung eines hydrostatischen Druckes auf den mit einer nicht dargestellten Ringnut für eine Druckflüssigkeit versehenen Außenring dieses Lagers verändern. Die Veränderung erfolgt dabei in Ab hängigkeit von der Drehzahl der Welle 1. Der drehzahl abhängigen Veränderung liegt die Überlegung zugrunde, daß die auf die Welle einwirkenden Kräfte bei niedrigen Drehzahlen (Schruppvorgänge) regelmäßig größer sind als bei hohen Drehzahlen (Schlichtvorgänge). Zum Er fassen der Drehzahlen der Welle 1 dient ein induktiver Drehzahlaufnehmer 6, dessen in einem Wandler 7 in Gleich strom oder Gleichspannung umgewandelte Signale einem PI-Regler 8 zugeleitet werden. Der PI-Regler 8 steuert einen Proportionalverstärker 9 für ein elektrisch be tätigbares Proportional-Druckbegrenzungsventil 10. Wäh rend der nach einer vorgegebenen Kennlinie erfolgenden Re gelung des Druckes der von einer durch einen Motor 11 an getriebenen Pumpe 12 aus einem Behälter 13 geförderten Druckflüssigkeit wird die tatsächliche Höhe des Druckes in der Hydraulikleitung 14 ständig durch ein Druckmeß gerät 15 mit nachgeschaltetem Druckmeßumformer 16 über wacht, wobei der Druckmeßumformer 16 die mechanische Größe "Druck" wiederum in einen Gleichstrom oder eine Gleichspannung umwandelt, der bzw. die ebenfalls dem Regler 8 zugeführt wird. Der Regler 8 ist folglich mit zwei Platinen ausgestattet, von denen die eine gewisser maßen den einer Drehzahl zugeordneten Druck einstellt und von denen die andere die Höhe dieses Druckes bei gleichbleibender Drehzahl überwacht bzw. konstant hält. In the figure, 1 is a shaft formed by the spindle of a machine tool, which is mounted in two roller bearings 2 and 3 . At the front end of the shaft 1 , a chuck 4 is arranged, which is under the action of a Ra dialkraft 5 . The rigidity of the rolling bearing 2 can be changed by the action of a hydrostatic pressure on the outer ring of this bearing, which is provided with an annular groove (not shown) for a hydraulic fluid. The change takes place as a function of the speed of shaft 1 . The speed-dependent change is based on the consideration that the forces acting on the shaft are generally greater at low speeds (roughing processes) than at high speeds (finishing processes). To record the speeds of the shaft 1 , an inductive speed sensor 6 is used , the signals converted into direct current or direct voltage in a converter 7 are fed to a PI controller 8 . The PI controller 8 controls a proportional amplifier 9 for an electrically operable proportional pressure relief valve 10 . While during a predetermined characteristic re regulation of the pressure of the pumped from a container 13 by a motor 11 driven pump 12 from a container 13 , the actual level of pressure in the hydraulic line 14 is constantly by a pressure measuring device 15 with a downstream pressure transducer 16 watches, the pressure transducer 16 in turn converts the mechanical variable "pressure" into a direct current or a direct voltage, which is also supplied to the controller 8 . The controller 8 is consequently equipped with two boards, one of which to a certain extent adjusts the pressure associated with a speed, and of which the other monitors or maintains the level of this pressure at a constant speed.
Die Welle 1 könnte auch als Hohlwelle ausgebildet sein, welche die Lager 2, 3 umschließt. In diesem Falle wäre der Innenring eines Lagers mit Druckflüssigkeit zu be aufschlagen. Statt eines PI-Reglers ließe sich auch ein PID-Regler einsetzen.The shaft 1 could also be designed as a hollow shaft which surrounds the bearings 2, 3 . In this case, the inner ring of a bearing would be opened with hydraulic fluid. Instead of a PI controller, a PID controller could also be used.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3910576A DE3910576C1 (en) | 1989-03-30 | 1989-03-30 | Apparatus for setting the bearing prestress at a shaft bearing arrangement, in particular for machine tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3910576A DE3910576C1 (en) | 1989-03-30 | 1989-03-30 | Apparatus for setting the bearing prestress at a shaft bearing arrangement, in particular for machine tools |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3910576C1 true DE3910576C1 (en) | 1990-07-12 |
Family
ID=6377620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3910576A Expired - Fee Related DE3910576C1 (en) | 1989-03-30 | 1989-03-30 | Apparatus for setting the bearing prestress at a shaft bearing arrangement, in particular for machine tools |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3910576C1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19716883C2 (en) * | 1996-04-23 | 2001-03-01 | Toshiba Machine Co Ltd | Main shaft failure condition detector in an air bearing type machine tool |
WO2001027482A1 (en) * | 1999-10-14 | 2001-04-19 | Steyr Daimler Puch Fahrzeugtechnik Ag & Co Kg | Arrangement of bearings of a high-speed shaft |
DE10123717A1 (en) * | 2001-05-15 | 2002-12-05 | Paul Mueller Gmbh & Co Kg | Machine tool motor spindle for holding a tool used in machining a workpiece provides improved machining accuracy by use of a tool displacement sensor integral in the spindle |
WO2009007301A3 (en) * | 2007-07-06 | 2009-04-30 | Junker Erwin Maschf Gmbh | Method for the support of a rotating workpiece during grinding and a hydrodynamic steady rest |
CN102155442A (en) * | 2011-03-18 | 2011-08-17 | 湖南工程学院 | Control loop of adjustable hydraulic loader |
DE102015118674A1 (en) * | 2015-10-30 | 2017-05-04 | Bernd Bösinger | Method for producing a precision spindle for machining |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8304587U1 (en) * | 1984-01-05 | Universal-Kugellager-Fabrik GmbH, 1000 Berlin | Shaft bearings, in particular machine tool spindle bearings |
-
1989
- 1989-03-30 DE DE3910576A patent/DE3910576C1/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8304587U1 (en) * | 1984-01-05 | Universal-Kugellager-Fabrik GmbH, 1000 Berlin | Shaft bearings, in particular machine tool spindle bearings |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19716883C2 (en) * | 1996-04-23 | 2001-03-01 | Toshiba Machine Co Ltd | Main shaft failure condition detector in an air bearing type machine tool |
WO2001027482A1 (en) * | 1999-10-14 | 2001-04-19 | Steyr Daimler Puch Fahrzeugtechnik Ag & Co Kg | Arrangement of bearings of a high-speed shaft |
DE10123717A1 (en) * | 2001-05-15 | 2002-12-05 | Paul Mueller Gmbh & Co Kg | Machine tool motor spindle for holding a tool used in machining a workpiece provides improved machining accuracy by use of a tool displacement sensor integral in the spindle |
WO2009007301A3 (en) * | 2007-07-06 | 2009-04-30 | Junker Erwin Maschf Gmbh | Method for the support of a rotating workpiece during grinding and a hydrodynamic steady rest |
CN101678530B (en) * | 2007-07-06 | 2012-02-01 | 埃尔温容克尔机械制造有限公司 | Method for the support of a rotating workpiece during grinding and a hydrodynamic steady rest |
RU2460629C2 (en) * | 2007-07-06 | 2012-09-10 | Эрвин Юнкер Машиненфабрик Гмбх | Method of supporting revolving article in grinding and hydrodynamic support |
US8641025B2 (en) | 2007-07-06 | 2014-02-04 | Erwin Junker Maschinenfabrik Gmbh | Method for the support of a rotating workpiece during grinding and a hydrodynamic steady rest |
CN102155442A (en) * | 2011-03-18 | 2011-08-17 | 湖南工程学院 | Control loop of adjustable hydraulic loader |
CN102155442B (en) * | 2011-03-18 | 2013-07-31 | 湖南工程学院 | Control loop of adjustable hydraulic loader |
DE102015118674A1 (en) * | 2015-10-30 | 2017-05-04 | Bernd Bösinger | Method for producing a precision spindle for machining |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |