WO1990002024A1 - Centreless circular grinding machine - Google Patents

Centreless circular grinding machine Download PDF

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Publication number
WO1990002024A1
WO1990002024A1 PCT/EP1989/000804 EP8900804W WO9002024A1 WO 1990002024 A1 WO1990002024 A1 WO 1990002024A1 EP 8900804 W EP8900804 W EP 8900804W WO 9002024 A1 WO9002024 A1 WO 9002024A1
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WO
WIPO (PCT)
Prior art keywords
spindle
grinding machine
cylindrical grinding
machine according
feed
Prior art date
Application number
PCT/EP1989/000804
Other languages
German (de)
French (fr)
Inventor
Ferdinand Ort
Original Assignee
Werkzeugmaschinenbau Präzisions-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
Application filed by Werkzeugmaschinenbau Präzisions-Technik Gmbh filed Critical Werkzeugmaschinenbau Präzisions-Technik Gmbh
Publication of WO1990002024A1 publication Critical patent/WO1990002024A1/en

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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
    • 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
    • B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
    • B23Q11/141—Methods or arrangements for maintaining a constant temperature in parts of machine tools using a closed fluid circuit for cooling or heating
    • 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
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
    • B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/007—Weight compensation; Temperature compensation; Vibration damping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35—Accessories

Definitions

  • the invention relates to a centerless cylindrical grinding machine with a machine bed, a grinding wheel and a regulating wheel, an infeed slide passing the machine bed accommodating either the grinding wheel or the regulating wheel and an infeed spindle designed as a threaded spindle being drivably mounted on the machine bed and engaging with a spindle nut on the infeed slide stands.
  • Centerless cylindrical grinding machines are either designed with a fixed grinding wheel and adjustable regulating wheel or vice versa with an adjustable grinding wheel and fixed regulating wheel.
  • the grinding wheel or the regulating wheel are each mounted in an infeed carriage that can be moved on the machine bed, an infeed spindle designed as a threaded spindle being drivably mounted on the machine bed and being in engagement with a spindle nut on the respective infeed carriage.
  • the thermal effects on the feed spindle are mainly caused by the coolant, which depending on the requirements of the respective grinding process - due to the development of heat between the grinding wheel and workpiece and the lubricating oil circulation of the grinding spindle - in a relatively large quantity and at different temperatures through the working area of the cylindrical grinding machine and flows through their machine bed.
  • the infeed spindle is usually located on the side of the infeed carriage, for example the side facing away from the work area
  • the regulating disc slide is arranged and is mounted on the machine bed at its end facing away from the feed slide.
  • this arrangement of the feed spindle has the result that changes in the length of the machine bed, which are caused by temperature changes in the coolant flowing through the machine bed, significantly impair the achievable working accuracy of the grinding machine.
  • the temperature fluctuations of the machine bed are not too great, they have an increasing effect on the positioning accuracy of the regulating wheel or grinding wheel, because the length of the machine bed, for example, between the grinding headstock and the distant bearing of the feed spindle for the regulating wheel slide for the temperature-related Length changes is crucial.
  • the object of the invention is therefore to design a centerless cylindrical grinding machine of the type mentioned at the outset in such a way that temperature changes occurring during operation, in particular under the action of the coolant supply, remain largely without influence on the delivery accuracy of the delivery carriage.
  • This object is achieved in that a temperature control device is provided for the feed spindle.
  • the feed spindle can be kept at a largely constant temperature regardless of external temperature fluctuations, so that there is no thermal expansion of the feed spindle between its mounting and the spindle nut.
  • the feed spindle has a longitudinal bore through which a tempered liquid, preferably oil, flows.
  • a tempered liquid preferably oil
  • the temperature of the feed spindle is thus achieved in a very effective but structurally simple manner.
  • the liquid is passed before entering the longitudinal bore of the feed spindle through a heat exchanger provided with a temperature control device, in which the liquid is brought to the predetermined constant temperature.
  • Lubricating oil supply device of the feed spindle has a heat exchanger provided with a temperature control device, which brings the lubricating oil to a predetermined constant temperature before it is fed to the feed spindle.
  • thermocontrol devices for the feed spindle are also possible, for example electrical heating elements.
  • Fig. 1 is a centerless cylindrical grinding machine with a fixed grinding wheel and adjustable control disc and 2 shows an enlarged longitudinal section in the area of the feed spindle for the regulating wheel slide of the cylindrical grinding machine according to FIG. 1.
  • the centerless cylindrical grinding machine shown in FIG. 1 has a machine bed 1 which carries a grinding headstock 2 in which a drivable grinding spindle 3 is mounted.
  • a feed slide designed as a control wheel slide 4 can be moved, which carries a bearing 5 for a control wheel 6.
  • a guide ruler 3 supporting the workpiece 7 is also attached to the regulating wheel slide 4.
  • the drivable control wheel 6 executes feed movements by moving against the grinding wheel 3 and away from it.
  • an infeed spindle 10 designed as a threaded spindle is mounted in the machine bed 1 below the grinding wheel 3 in a spindle bearing 9 and is in engagement with a spindle nut 11 in the regulating disc slide 4.
  • the spindle bearing 9 consists of several roller bearings arranged side by side, which are received in a bearing sleeve 12 screwed onto the machine bed 1.
  • a toothed belt pulley 13 is fastened, which can be driven by a spindle drive motor 15 via a gear 16 and a toothed belt pulley 17 via a toothed belt drive 14.
  • a rotary encoder 18 is connected to the feed spindle 10 and gives a machine control 19 the path information required for the control of the feed movement.
  • the spindle bearing 9 is followed by a cylindrical spindle section 20 and then a threaded section 21.
  • the threaded section 21, which forms the free end of the feed spindle 10 is in engagement with the spindle nut 11 and projects into a space 22, which is formed in the regulating disc slide 4 and is closed to the outside.
  • a sleeve 23 connected to the spindle nut 11 extends over the cylindrical spindle section 20 and carries at its end facing the bearing 9 a seal 24 which seals against the cylindrical outer surface of the section 20 during a longitudinal displacement.
  • the feed spindle 10 has a longitudinal bore 25 which extends as a blind bore to just before the free end of the threaded section 21. At the other end of the spindle, the longitudinal bore 25 is closed by an insert 26.
  • a central tube 27 is arranged in this, which is fastened at one end in the insert 26 and extends freely with its other end to the end of the longitudinal bore 25.
  • Temperature-controlled oil or another temperature-controlled liquid flows from a heat exchanger 29 controlled by a temperature control device 28 to an inlet bore 30 of a distributor bushing 31, which is arranged in a fixed and sealed manner on the left end (in FIG. 2) of the feed spindle 10.
  • the oil passes through radial bores 32 into a jacket space 33 which is annular in cross section and which is located between the central tube 27 and the tube Wall of the longitudinal bore 25 is formed.
  • the oil flows in the jacket space 33 over almost the entire length of the feed spindle 10, whereby there is a heat exchange between the oil and the feed spindle 10.
  • the oil from the jacket space 33 enters the end of the central tube 27 and flows through this central tube 27 to the insert 26.
  • the oil passes through radial bores 34 in the insert 26 into a drain hole 35 of the distributor sleeve 31 and from there back to the heat exchanger 29.
  • the entry end 36 of the feed spindle 10 is thus at that of the spindle nut
  • An electrical heating element can be used as the heat exchanger 29, for example, on which the oil is heated to the predetermined constant temperature.
  • a cooling element for tempering the oil can also be provided as a heat exchanger, particularly for operation in countries with a hot climate.
  • a lubricating oil supply device 37 for the feed spindle 10 which is only indicated schematically in FIG. 2, is provided with a temperature control device 38 for a heat exchanger 39.
  • the lubricating oil Supply device 37 supplies, via the heat exchanger 39, lubricating oil of a predetermined constant temperature via a supply line 40 to the closed space 22 which contains the spindle nut 11 and into which the free end of the feed spindle 10 projects.
  • thermocontrol devices instead of the temperature control devices described for the feed spindle 10, other temperature control devices can also be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

In a centreless circular grinding machine with a driven grinding wheel (3), a control wheel carriage (4) which carries a drivable control wheel (6) travels along a machine bed (1). The adjustment movement of the control wheel carriage (4) is effected by an adjustment spindle (10) which is mounted on the machine bed (1) and engages with a spindle nut (11) on the control wheel carriage (4). The adjustment spindle (10) has a longitudinal hole for the passage of a liquid maintained at constant temperature by a thermostat. Variations in the length of the adjustment spindle (10) due to fluctuation in temperature are thereby prevented.

Description

Spitzenlose RundschleifmaschineCenterless cylindrical grinding machine
Die Erfindung betrifft eine spitzenlose Rundschleifmaschine mit einem Maschinenbett, einer Schleifscheibe und einer Regelscheibe, wobei einam Maschinenbett vorbeifahrender Zustellschlitten die Lagerung für entweder die Schleifscheibe oder die Regelscheibe aufnimmt und eine als Gewindespindel ausgeführte Zustellspindel am Maschinenbett antreibbar gelagert ist und mit einer Spindelmutter am Zustellschlitten in Eingriff steht.The invention relates to a centerless cylindrical grinding machine with a machine bed, a grinding wheel and a regulating wheel, an infeed slide passing the machine bed accommodating either the grinding wheel or the regulating wheel and an infeed spindle designed as a threaded spindle being drivably mounted on the machine bed and engaging with a spindle nut on the infeed slide stands.
Spitzenlose Rundschleifmaschinen werden entweder mit feststeheder Schleifscheibe umd zustellbarer Regelscheibe oder umgekehrt mit zustellbarer Schleifscheibe und feststehender Regelscheibe ausgeführt. Die Schleifscheibe oder die Regelscheibe sind jeweils in einem am Maschinenbett verfahrbaren Zustellschlitten gelagert, wobei eine als Gewindespindel ausgeführte Zustellspindel am Maschinenbett antreibbar gelagert ist und mit einer Spindelmutter am jeweiligen Zustellschlitten in Eingriff steht.Centerless cylindrical grinding machines are either designed with a fixed grinding wheel and adjustable regulating wheel or vice versa with an adjustable grinding wheel and fixed regulating wheel. The grinding wheel or the regulating wheel are each mounted in an infeed carriage that can be moved on the machine bed, an infeed spindle designed as a threaded spindle being drivably mounted on the machine bed and being in engagement with a spindle nut on the respective infeed carriage.
Den hohen Genauigkeitsanforderungen, die an spitzenlose Rundschleifmaschinen gestellt werden, stehen die thermischen Einwirkungen entgegen, denen die Zustellspindel für den Zustellschlitten ausgesetzt ist. Längenänderungen der Zustellspindel infolge von Temperaturänderungen führen unmittelbar zu Maßabweichungen an den Werkstücken. Diese Maßabweichungen können nur durch eine aufwendige MeßSteuerung vermieden werden, die das Istmaß der Werkstücke erfaßt und den Zustellschlitten verstellt.The high accuracy requirements placed on centerless cylindrical grinding machines are countered by the thermal effects to which the feed spindle for the feed slide is exposed. Length changes of the feed spindle due to Temperature changes immediately lead to dimensional deviations on the workpieces. These dimensional deviations can only be avoided by means of a complex measurement control system that records the actual dimensions of the workpieces and adjusts the feed slide.
Die thermischen Einwirkungen auf die Zustellspindel werden hauptsächlich vom Kühlmittel verursacht, das je nach den Anforderungen des jeweiligen Schleifprozesses - bedingt durch die Entwicklungen der Wärmeentwicklung zwischen Schleifscheibe und Werkstück sowie des Schmierölumlaufs der Schleifspindel - in verhältnismäßig großer Menge und mit unterschiedlichen Temperaturen durch den Arbeitsraum der Rundschleifmaschine und durch deren Maschinenbett fließt. Um die Zustellspindel diesen unerwünschten thermischen Einwirkungen durch das Kühlmittel nach Möglichkeit zu entziehen, wird die Zustellspindel üblicherweise an der dem Arbeitsraum abgekehrten Seite des Zustellschlittens, beispielsweise desThe thermal effects on the feed spindle are mainly caused by the coolant, which depending on the requirements of the respective grinding process - due to the development of heat between the grinding wheel and workpiece and the lubricating oil circulation of the grinding spindle - in a relatively large quantity and at different temperatures through the working area of the cylindrical grinding machine and flows through their machine bed. In order to remove the undesired thermal effects from the coolant as far as possible from the infeed spindle, the infeed spindle is usually located on the side of the infeed carriage, for example the side facing away from the work area
Regelscheibenschlittens angeordnet und an ihrem der dem Zustellschlitten abgekehrten Ende am Maschinenbett gelagert. Diese Anordnung der Zustellspindel führt aber dazu, daß Längenänderungen des Maschinenbettes, die durch Temperaturveränderungen des durch das Maschinenbett strömenden Kühlmittels verursacht werden, die erzielbare Arbeitsgenauigkeit der Schleifmaschine erheblich beeinträchtigen. Obwohl die TemperaturSchwankungen des Maschinenbettes nicht allzu groß sind, wirken sie sich doch verstärkt auf die Positioniergenauigkeit der Regelscheibe bzw. der Schleifscheibe aus, weil die Länge des Maschinenbettes beispielsweise zwischen den Schleifspindelstock und der weit entfernt davon liegenden Lagerung der Zustellspindel für den Regelscheibenschlitten für die temperaturbedingten Längenänderungen entscheidend ist. Aufgabe der Erfindung ist es daher, eine spitzenlose Rundschleifmaschine der eingangs genannten Gattung so auszubilden, daß im Betrieb auftretende Temperaturänderungen, insbesondere unter der Einwirkung der Kühlmittelzufuhr, weitgehend ohne Einfluß auf die Zustellgenauigkeit des Zustellschlittens bleiben.The regulating disc slide is arranged and is mounted on the machine bed at its end facing away from the feed slide. However, this arrangement of the feed spindle has the result that changes in the length of the machine bed, which are caused by temperature changes in the coolant flowing through the machine bed, significantly impair the achievable working accuracy of the grinding machine. Although the temperature fluctuations of the machine bed are not too great, they have an increasing effect on the positioning accuracy of the regulating wheel or grinding wheel, because the length of the machine bed, for example, between the grinding headstock and the distant bearing of the feed spindle for the regulating wheel slide for the temperature-related Length changes is crucial. The object of the invention is therefore to design a centerless cylindrical grinding machine of the type mentioned at the outset in such a way that temperature changes occurring during operation, in particular under the action of the coolant supply, remain largely without influence on the delivery accuracy of the delivery carriage.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine Temperiereinrichtung für die Zustellspindel vorgesehen ist. Hierdurch kann die Zustellspindel unabhängig von äußeren Temperaturschwankungen auf einer weitgehend konstanten Temperatur gehalten werden, so daß keine Wärmedehnung der Zustellspindel zwischen deren Lagerung und der Spindelmutter auftreten.This object is achieved in that a temperature control device is provided for the feed spindle. As a result, the feed spindle can be kept at a largely constant temperature regardless of external temperature fluctuations, so that there is no thermal expansion of the feed spindle between its mounting and the spindle nut.
Damit wird es möglich, die Zustellspindel an der aus konstruktiven Gründen, insbesondere der Steifigkeit der Rundschleifmaschine besonders geeigneten Stelle unterzubringen, nämlich unmittelbar zwischen dem Schleifspindelstock und dem Regelscheibenschlitten bzw. zwischen dem Regelscheibenstock und dem Schleifscheibenschlitten. Die zwischen der Schleifscheibe und der Regelscheibe beim Bearbeitungsvorgang auftretenden Reaktionskräfte werden hierbei unmittelbar und ohne Umweg über das Maschinenbett von der Zustellspindel übertragen. Längenänderungen des Maschinenbettes infolge von Temperaturänderungen des durch das Maschinenbett strömenden Kühlmittels bleiben ohne Einfluß auf die Positioniergenauigkeit des Zustellschlittens. Obwohl die Zustellspindel dabei unmittelbar unter den Arbeitsraum der Rundschleifmaschine und somit im Bereich des herabströmenden Kühlmittels angeordnet ist, haben Temperaturschwankungen des Kühlmittels keinen Einfluß auf die Zustellspindel, weil diese auf einer konstanten Temperatur gehalten wird. Gemäß einer vorteilhaften Ausführungsform der Erfindung ist vorgesehen, daß die Zustellspindel eine Längsbohrung aufweist, die von einer temperierten Flüssigkeit, vorzugsweise Öl, durchflössen wird. Damit wird in sehr wirkungsvoller, aber konstruktiv einfacher Weise die Temperierung der Zustellspindel erreicht. Zweckmäßigerweise wird die Flüssigkeit vor dem Eintritt in die Längsbohrung der Zustellspindel durch einen mit einer Temperaturregeleinrichtung versehenen Wärmetauscher geleitet, in dem die Flüssigkeit auf die vorgegebene konstante Temperatur gebracht wird.This makes it possible to accommodate the feed spindle at the location that is particularly suitable for structural reasons, in particular the rigidity of the cylindrical grinding machine, namely directly between the grinding headstock and the regulating wheel slide or between the regulating wheel block and the grinding wheel slide. The reaction forces that occur between the grinding wheel and the regulating wheel during the machining process are transmitted directly and without detour via the machine bed from the feed spindle. Changes in the length of the machine bed as a result of temperature changes in the coolant flowing through the machine bed have no influence on the positioning accuracy of the feed carriage. Although the feed spindle is arranged directly under the working area of the cylindrical grinding machine and thus in the area of the coolant flowing down, temperature fluctuations of the coolant have no influence on the feed spindle because it is kept at a constant temperature. According to an advantageous embodiment of the invention, it is provided that the feed spindle has a longitudinal bore through which a tempered liquid, preferably oil, flows. The temperature of the feed spindle is thus achieved in a very effective but structurally simple manner. Advantageously, the liquid is passed before entering the longitudinal bore of the feed spindle through a heat exchanger provided with a temperature control device, in which the liquid is brought to the predetermined constant temperature.
Es kann auch vorgesehen sein, daß eineIt can also be provided that a
Schmierölversorgungseinrichtung der Zustellspindel einen mit einer Temperaturregeleinrichtung versehenen Wärmetauscher aufweist, der das Schmieröl vor der Zufuhr zur Zustellspindel auf eine vorgegebene konstante Temperatur bringt.Lubricating oil supply device of the feed spindle has a heat exchanger provided with a temperature control device, which brings the lubricating oil to a predetermined constant temperature before it is fed to the feed spindle.
Darüber hinaus sind auch andere Temperiereinrichtungen für die Zustellspindel möglich, beispielsweise elektrische Heizelemente.In addition, other temperature control devices for the feed spindle are also possible, for example electrical heating elements.
Weitere vorteilhafte Ausgestaltungen des Erfindungsgedankens sind Gegenstand weiterer Unteransprüche.Further advantageous embodiments of the inventive concept are the subject of further dependent claims.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung näher erläutert, das in der Zeichnung dargestellt ist. Es zeigt:An exemplary embodiment of the invention is illustrated below, which is shown in the drawing. It shows:
Fig. 1 eine spitzenlose Rundschleifmaschine mit feststehender Schleifscheibe und zustellbarer Regelscheibe und Fig. 2 einen vergrößerten Längsschnitt im Bereich der Zustellspindel für den Regelscheibenschlitten der Rundschleifmaschine nach Fig. 1.Fig. 1 is a centerless cylindrical grinding machine with a fixed grinding wheel and adjustable control disc and 2 shows an enlarged longitudinal section in the area of the feed spindle for the regulating wheel slide of the cylindrical grinding machine according to FIG. 1.
Die in Fig. 1 gezeigte spitzenlose Rundschleifmaschine weist ein Maschinenbett 1 auf, das einen Schleifspindelstock 2 trägt, in dem eine antreibbare Schleifspindel 3 gelagert ist.The centerless cylindrical grinding machine shown in FIG. 1 has a machine bed 1 which carries a grinding headstock 2 in which a drivable grinding spindle 3 is mounted.
Auf dem Maschinenbett 1 ist ein als Regelscheibenschlitten 4 ausgeführter Zustellschlitten verfahrbar, der eine Lagerung 5 für eine Regelscheibe 6 trägt. Am Regelscheibenschlitten 4 ist auch ein das Werkstück 7 stützendes Führungslineal 3 angebracht.On the machine bed 1, a feed slide designed as a control wheel slide 4 can be moved, which carries a bearing 5 for a control wheel 6. A guide ruler 3 supporting the workpiece 7 is also attached to the regulating wheel slide 4.
Die antreibbare Regelscheibe 6 führt Zustellbewegungen aus, indem sie gegen die Schleifscheibe 3 und von dieser weg verfahren wird. Hierzu ist im Maschinenbett 1 unterhalb der Schleifscheibe 3 in einer Spindellagerung 9 eine als Gewindespindel ausgeführte Zustellspindel 10 gelagert, die mit einer Spindelmutter 11 im Regelscheibenschlitten 4 in Eingriff steht.The drivable control wheel 6 executes feed movements by moving against the grinding wheel 3 and away from it. For this purpose, an infeed spindle 10 designed as a threaded spindle is mounted in the machine bed 1 below the grinding wheel 3 in a spindle bearing 9 and is in engagement with a spindle nut 11 in the regulating disc slide 4.
Einzelheiten der Zustellspindel 10 und deren Lagerung sind in Fig. 2 dargestellt. Die Spindellagerung 9 besteht aus mehreren, nebeneinander angeordneten Wälzlagern, die in einer am Maschinenbett 1 angeschraubten Lagerhülse 12 aufgenommen sind. Auf dem der Spindelmutter 11 abgekehrten Ende der Zustellspindel 10 ist eine Zahnriemenscheibe 13 befestigt, die über einen Zahnriementrieb 14 von einem Spindelantriebsmotor 15 über ein Getriebe 16 und eine Zahnriemenscheibe 17 antreibbar ist. Ein Drehwinkelgeber 18 ist mit der Zustellspindel 10 verbunden und gibt einer Maschinensteuerung 19 die für die Steuerung der Zustellbewegung erforderlichen Weginformationen.Details of the feed spindle 10 and its storage are shown in FIG. 2. The spindle bearing 9 consists of several roller bearings arranged side by side, which are received in a bearing sleeve 12 screwed onto the machine bed 1. On the end of the feed spindle 10 facing away from the spindle nut 11, a toothed belt pulley 13 is fastened, which can be driven by a spindle drive motor 15 via a gear 16 and a toothed belt pulley 17 via a toothed belt drive 14. A rotary encoder 18 is connected to the feed spindle 10 and gives a machine control 19 the path information required for the control of the feed movement.
Auf der anderen Seite schließt sich an die Spindellagerung 9 ein zylindrischer Spindelabschnitt 20 und danach ein Gewindeabschnitt 21 an. Der Gewindeabschnitt 21 , der das freie Ende der Zustellspindel 10 bildet, steht in Eingriff mit der Spindelmutter 11 und ragt in einen im Regelscheibenschlitten 4 gebildeten, nach außen abgeschlossenen Raum 22. Eine mit der Spindelmutter 11 verbundene Hülse 23 erstreckt sich über den zylindrischen Spindelabschnitt 20 und trägt an ihrem der Lagerung 9 zugekehrten Ende eine Dichtung 24, die gegenüber der zylindrischen Außenfläche des Abschnitts 20 bei einer Längsverschiebung dichtet.On the other hand, the spindle bearing 9 is followed by a cylindrical spindle section 20 and then a threaded section 21. The threaded section 21, which forms the free end of the feed spindle 10, is in engagement with the spindle nut 11 and projects into a space 22, which is formed in the regulating disc slide 4 and is closed to the outside. A sleeve 23 connected to the spindle nut 11 extends over the cylindrical spindle section 20 and carries at its end facing the bearing 9 a seal 24 which seals against the cylindrical outer surface of the section 20 during a longitudinal displacement.
Die Zustellspindel 10 weist eine Längsbohrung 25 auf, die als Sackbohrung bis kurz vor das freie Ende des Gewindeabschnitts 21 reicht. Am anderen Spindelende ist die Längsbohrung 25 durch einen Einsatz 26 verschlossen.The feed spindle 10 has a longitudinal bore 25 which extends as a blind bore to just before the free end of the threaded section 21. At the other end of the spindle, the longitudinal bore 25 is closed by an insert 26.
Zentrisch und mit allseitigem Abstand zur Innenwand der Längsbohrung 25 ist in dieser ein zentrales Rohr 27 angeordnet, das an seinem einen Ende im Einsatz 26 befestigt ist und mit seinem anderen Ende frei bis vor das Ende der Längsbohrung 25 reicht.Centrally and at all distances from the inner wall of the longitudinal bore 25, a central tube 27 is arranged in this, which is fastened at one end in the insert 26 and extends freely with its other end to the end of the longitudinal bore 25.
Aus einem von einer Temperaturregeleinrichtung 28 gesteuerten Wärmetauscher 29 strömt temperiertes Öl oder eine andere temperierte Flüssigkeit zu einer Zulaufbohrung 30 einer Verteilerbüchse 31 , die feststehend und abgedichtet auf dem linken Ende (in Fig. 2) der Zustellspindel 10 angeordnet ist. Durch radiale Bohrungen 32 gelangt das Öl in einen im Querschnitt ringförmigen Mantelraum 33, der zwischen dem zentralen Rohr 27 und der Wandung der Längsbohrung 25 gebildet ist. Das Öl strömt im Mantelraum 33 über nahezu die gesamte Länge der Zustellspindel 10, wobei es zu einem Wärmetausch zwischen dem Öl und der Zustellspindel 10 kommt. Die ZustellspindelTemperature-controlled oil or another temperature-controlled liquid flows from a heat exchanger 29 controlled by a temperature control device 28 to an inlet bore 30 of a distributor bushing 31, which is arranged in a fixed and sealed manner on the left end (in FIG. 2) of the feed spindle 10. The oil passes through radial bores 32 into a jacket space 33 which is annular in cross section and which is located between the central tube 27 and the tube Wall of the longitudinal bore 25 is formed. The oil flows in the jacket space 33 over almost the entire length of the feed spindle 10, whereby there is a heat exchange between the oil and the feed spindle 10. The feed spindle
10 nimmt dabei die Temperatur des zugeführten Öls an.10 takes on the temperature of the supplied oil.
Am rechten Ende der Zustellspindel 10 tritt das Öl aus dem Mantelraum 33 in das Ende des zentralen Rohrs 27 ein und strömt durch dieses zentrale Rohr 27 bis zum Einsatz 26. Durch radiale Bohrungen 34 im Einsatz 26 gelangt das Öl in eine Ablaufbohrung 35 der Verteilerbüchse 31 und von dort wieder zum Wärmetauscher 29 zurück. Das Eintrittsende 36 der Zustellspindel 10 liegt somit an der der SpindelmutterAt the right-hand end of the feed spindle 10, the oil from the jacket space 33 enters the end of the central tube 27 and flows through this central tube 27 to the insert 26. The oil passes through radial bores 34 in the insert 26 into a drain hole 35 of the distributor sleeve 31 and from there back to the heat exchanger 29. The entry end 36 of the feed spindle 10 is thus at that of the spindle nut
11 abgekehrten Seite der Spindellagerung 9. Der zwischen der Spindellagerung 9 und der Gewindemutter 11 liegende Spindelabschnitt wird daher vollständig von dem temperierten Öl durchströmt und auf der vorgegebenen konstanten Temperatur gehalten. Dieser Abschnitt der Zustellspindel 10 würde bei einer durch11 facing away from the spindle bearing 9. The spindle section lying between the spindle bearing 9 and the threaded nut 11 is therefore completely flowed through by the tempered oil and kept at the predetermined constant temperature. This section of the feed spindle 10 would pass through
Temperaturschwankungen bedingten Längenänderung zu einer Änderung der Zustellposition des Regelscheibenschlittens 4 führen.Changes in length caused by temperature fluctuations lead to a change in the infeed position of the regulating wheel slide 4.
Als Wärmetauscher 29 kann beispielsweise ein elektrisches Heizelement verwendet werden, an dem das Öl auf die vorgegebene konstante Temperatur erwärmt wird. Insbesondere für den Betrieb in Ländern mit heißem Klima kann als Wärmetauscher auch ein Kühlelement zur Temperierung des Öls vorgesehen-werden.An electrical heating element can be used as the heat exchanger 29, for example, on which the oil is heated to the predetermined constant temperature. A cooling element for tempering the oil can also be provided as a heat exchanger, particularly for operation in countries with a hot climate.
Zusätzlich zu der beschriebenen Temperiereinrichtung kann auch vorgesehen werden, daß eine in Fig. 2 nur schematisch angedeutete Schmieröl-Versorgungseinrichtung 37 für die Zustellspindel 10 mit einer Temperaturregeleinrichtung 38 für einen Wärmetauscher 39 versehen ist. Die Schmieröl- Versorgungseinrichtung 37 liefert über den Wärmetauscher 39 Schmieröl von vorgegebener konstanter Temperatur über eine Zufuhrleitung 40 an den geschlossenen Raum 22, der die Spindelmutter 11 enthält und in den das freie Ende der Zustellspindel 10 ragt.In addition to the temperature control device described, it can also be provided that a lubricating oil supply device 37 for the feed spindle 10, which is only indicated schematically in FIG. 2, is provided with a temperature control device 38 for a heat exchanger 39. The lubricating oil Supply device 37 supplies, via the heat exchanger 39, lubricating oil of a predetermined constant temperature via a supply line 40 to the closed space 22 which contains the spindle nut 11 and into which the free end of the feed spindle 10 projects.
Anstelle der beschriebenen Temperiereinrichtungen für die Zustellspindel 10 können auch andere Temperiereinrichtungen vorgesehen werden. Instead of the temperature control devices described for the feed spindle 10, other temperature control devices can also be provided.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Spitzenlose Rundschleifmaschine mit einem Maschinenbett, einer Schleifscheibe und einer Regelscheibe,* wobei ein am Maschinenbett verfahrbarer Zustellschlitten die Lagerung für entweder die Schleifscheibe oder die Regelscheibe aufnimmt und eine als Gewindespindel ausgeführte Zustellspindel am Maschinenbett antreibbar gelagert ist und mit einer Spindelmutter am Zustellschlitten in Eingriff steht, dadurch gekennzeichnet, daß eine Temperiereinrichtung für die Zustellspindel (10) vorgesehen ist.1.Tipless cylindrical grinding machine with a machine bed, a grinding wheel and a regulating wheel, * whereby an infeed carriage that can be moved on the machine bed accommodates the storage for either the grinding wheel or the regulating wheel and an infeed spindle designed as a threaded spindle is drivably mounted on the machine bed and engages with a spindle nut on the infeed carriage stands, characterized in that a temperature control device is provided for the feed spindle (10).
2. Rundschleifmaschine nach Anspruch 1 , dadurch gekennzeichnet, daß die Zustellspindel (10) eine Längsbohrung (25) aufweist, die von einer temperierten Flüssigkeit durchflössen wird.2. Cylindrical grinding machine according to claim 1, characterized in that the feed spindle (10) has a longitudinal bore (25) through which a tempered liquid flows.
3. Rundschleifmaschine nach Anspruch 2, dadurch gekennzeichnet, daß die temperierte Flüssigkeit ein Öl ist. 3. Cylindrical grinding machine according to claim 2, characterized in that the tempered liquid is an oil.
4. Rundschleifmaschine nach Anspruch 2, dadurch gekennzeichnet, daß die Flüssigkeit vor dem Eintritt in die Längsbohrung (25) der Zustellspindel (10) durch einen mit einer Temperaturregeleinrichtung (28) versehenen4. Cylindrical grinding machine according to claim 2, characterized in that the liquid before entering the longitudinal bore (25) of the feed spindle (10) by a with a temperature control device (28)
Wärmetauscher (29) geleitet wird.Heat exchanger (29) is passed.
5. Rundschleifmaschine nach Anspruch 2, dadurch gekennzeichnet, daß zentrisch in der Längsbohrung (25) ein zentrales Rohr (27) angeordnet ist und daß die temperierte Flüssigkeit durch eine zwischen dem zentralen Rohr (27) und der Bohrungswand der Längsbohrung (25) gebildeten Mantelraum und durch das zentrale Rohr (27) strömt.5. Cylindrical grinding machine according to claim 2, characterized in that a central tube (27) is arranged centrally in the longitudinal bore (25) and that the tempered liquid is formed by a jacket space formed between the central tube (27) and the bore wall of the longitudinal bore (25) and flows through the central tube (27).
6. Rundschleifmaschine nach Anspruch 5, dadurch gekennzeichnet, daß das Eintrittsende (36) der Längsbohrung (25) an der der Spindelmutter (11) abgekehrten Seite der Spindellagerung (9) liegt.6. Cylindrical grinding machine according to claim 5, characterized in that the inlet end (36) of the longitudinal bore (25) on the side of the spindle bearing (9) facing away from the spindle nut (11).
7. Rundschleifmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Temperiereinrichtung ein elektrisches Heizelement oder ein Kühlelement aufweist.7. Cylindrical grinding machine according to claim 1, characterized in that the temperature control device has an electric heating element or a cooling element.
8. Rundschleifmaschine nach Anspruch 1 , dadurch gekennzeichnet, daß eine Schmieröl-Versorgungseinrichtung (37) der Zustellspindel (10) einen mit einer Temperaturregeleinrichtung (38) versehenen Wärmetauscher (39) aufweist, der das Schmieröl vor der Zufuhr zur Zustellspindel (10) auf eine vorgegebene konstante Temperatur bringt.8. Cylindrical grinding machine according to claim 1, characterized in that a lubricating oil supply device (37) of the feed spindle (10) has a temperature control device (38) provided with a heat exchanger (39) which the lubricating oil before being fed to the feed spindle (10) predetermined constant temperature brings.
9. Rundschleifmaschine nach Anspruch 8, dadurch gekennzeichnet, daß der Wärmetauscher (39) an einer9. Cylindrical grinding machine according to claim 8, characterized in that the heat exchanger (39) on one
Zufuhrleitung (40) für Schmieröl zu einem dieSupply line (40) for lubricating oil to one of the
Spindelmutter (11) enthaltenden geschlossenen Raum (22) angeordnet ist, in den das freie Ende der ZustellspindelSpindle nut (11) containing enclosed space (22) is arranged in the free end of the feed spindle
(10) ragt. (10) protrudes.
PCT/EP1989/000804 1988-08-16 1989-07-11 Centreless circular grinding machine WO1990002024A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3827685.2 1988-08-16
DE19883827685 DE3827685A1 (en) 1988-08-16 1988-08-16 CENTERLESS ROUND GRINDING MACHINE

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WO1990002024A1 true WO1990002024A1 (en) 1990-03-08

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PCT/EP1989/000804 WO1990002024A1 (en) 1988-08-16 1989-07-11 Centreless circular grinding machine

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EP (1) EP0382821A1 (en)
DE (1) DE3827685A1 (en)
ES (1) ES2014376A6 (en)
WO (1) WO1990002024A1 (en)

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Publication number Priority date Publication date Assignee Title
EP0726120A1 (en) * 1994-01-14 1996-08-14 Lidköping Machine Tools AB Centerless machine
CN1068271C (en) * 1995-03-01 2001-07-11 利德雪平机器工具公司 Centreless machine
CN103394978A (en) * 2013-07-18 2013-11-20 蒿庆国 Centerless grinding machine for conical rollers
CN108608325A (en) * 2018-05-18 2018-10-02 河南中帅金属制品有限公司 A kind of casting iron pan base edge polishing Antiskid clamping device of vehicle

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0726120A1 (en) * 1994-01-14 1996-08-14 Lidköping Machine Tools AB Centerless machine
CN1068271C (en) * 1995-03-01 2001-07-11 利德雪平机器工具公司 Centreless machine
CN103394978A (en) * 2013-07-18 2013-11-20 蒿庆国 Centerless grinding machine for conical rollers
CN103394978B (en) * 2013-07-18 2016-01-13 蒿庆国 A kind of conical roller centerless grinding machine
CN108608325A (en) * 2018-05-18 2018-10-02 河南中帅金属制品有限公司 A kind of casting iron pan base edge polishing Antiskid clamping device of vehicle

Also Published As

Publication number Publication date
DE3827685A1 (en) 1990-02-22
ES2014376A6 (en) 1990-07-01
EP0382821A1 (en) 1990-08-22

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