WO1998009773A1 - Grinding machine - Google Patents

Grinding machine Download PDF

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Publication number
WO1998009773A1
WO1998009773A1 PCT/CH1997/000319 CH9700319W WO9809773A1 WO 1998009773 A1 WO1998009773 A1 WO 1998009773A1 CH 9700319 W CH9700319 W CH 9700319W WO 9809773 A1 WO9809773 A1 WO 9809773A1
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WO
WIPO (PCT)
Prior art keywords
grinding
grinding wheel
machine
wheel
protection
Prior art date
Application number
PCT/CH1997/000319
Other languages
German (de)
French (fr)
Inventor
Urs Tschudin
Original Assignee
Urs Tschudin
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 Urs Tschudin filed Critical Urs Tschudin
Priority to DE19780914T priority Critical patent/DE19780914D2/en
Publication of WO1998009773A1 publication Critical patent/WO1998009773A1/en

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Classifications

    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/045—Protective covers for the grinding wheel with cooling means incorporated

Definitions

  • the invention relates to a grinding machine for grinding workpieces, with a workpiece holder, a machine bed, a drive device provided with a control, which is connected to a grinding spindle, wherein a grinding wheel that can be moved in translation can be driven in rotation by the grinding spindle, a coolant supply through which Coolant can be brought into an area of engagement of the grinding wheel with the workpiece, as well as a grinding wheel protection, to form a grinding wheel space in which the grinding wheel can be arranged,
  • grinding machines are usually provided with a grinding wheel protector which surrounds the grinding wheel of the machine.
  • the purpose of grinding wheel protection is, on the one hand, to collect the coolant used during the grinding process in order to prevent contamination of the machine.
  • the grinding wheel protection is intended to protect the operator from detached grinding wheel particles or from a possibly even broken grinding wheel.
  • grinding wheel guards are always arranged in the immediate vicinity of the grinding wheel.
  • grinding wheel protection is also to be understood in principle as something different than, for example, a machine room encapsulation. As its name suggests, it differs from grinding wheel protection in that it surrounds the entire machine room - including the workpiece holder and the grinding headstock.
  • the grinding wheel protection is in fact matched to the initial diameter of the largest grinding wheel to be used. If smaller grinding wheels are used, or if the diameter of a grinding wheel has decreased significantly after repeated use and dressing, the distance between the wheel and the contactor becomes larger. The coolant entrained by the grinding wheel is therefore only partially thrown against the grinding wheel protection. The other part can escape from the protection and thus contaminate the machine. If these are cylindrical grinding machines, then there is also the fact that the coolant, due to the compensating movement of the grinding wheel together with the grinding wheel guard, also strikes a rotating workpiece. As has been shown, the coolant that bounces off the workpiece in an uncontrolled manner contaminates the grinding machine.
  • the invention is therefore based on the object of designing a grinding machine in such a way that the abovementioned functions of grinding wheel protection are better guaranteed.
  • a grinding wheel protector for a grinding machine provided with a control, which has a housing which forms a grinding wheel space for receiving a grinding wheel, and is provided with means for fixed fixing of the housing with respect to the grinding machine.
  • the grinding wheel protection no longer follows the grinding wheel during its translatory movement, there is no need to track the nozzle of the coolant supply and expensive adjustment and tracking mechanisms for the coolant supply can be avoided.
  • the coolant nozzle is always directed towards the area of engagement of the outer surface of the grinding wheel with the workpiece, whereby the risk of burn marks can be significantly reduced.
  • Fig. 1 is a partially sectioned representation of a known part shown
  • FIG. 2 shows a partially sectioned illustration of a grinding machine according to the invention, shown in sections.
  • a grinding wheel protection 1 is movably arranged relative to a machine bed 2.
  • a grinding wheel 3 is located in a grinding wheel space 4 formed by the grinding wheel protection 1.
  • the protection 1 shown in section is fixed to a grinding spindle on a movable grinding headstock 6.
  • the in Fig. 2 shown numerically controlled Runds..cj grinding machine is provided with a grinding wheel protection 11, which is releasably attached to the machine bed 12 with suitable fasteners 14, for example with screws.
  • the grinding wheel protector 11 is thus fixed and cannot perform any translatory movements either relative to a grinding wheel 13 or in absolute terms.
  • the grinding wheel 13 located on a grinding spindle 15 is arranged within a grinding wheel space 17 formed by a housing 16 of the grinding wheel protection 11.
  • a housing 16 of the grinding wheel protection 11 In the representation of Fig. 2 is the
  • Grinding wheel 13 also shown in a second position in the grinding wheel space by a dotted circular line. As can be seen, the height H of the grinding wheel space 17 is only insignificantly greater than the diameter D of the largest grinding wheel 13 used. The length of the
  • the grinding wheel guard 13 has a grinding headstock 18 opposite it.
  • sheet metal 20 has a horizontally oriented slot-like recess 21 through which the grinding spindle 13 projects into the grinding wheel space 17 and in which the grinding spindle can be moved in the horizontal direction.
  • Such translatory movements like the rotational movement of the grinding wheel - are generated by drive devices arranged outside the grinding wheel chamber 17. These are arranged in a grinding headstock 18, in which the grinding spindle 15 is also mounted.
  • the housing 16 of the grinding wheel protection 11 has essentially the shape of a cuboid, in which end pieces of a side surface 22 are angled towards the grinding wheel space.
  • the grinding wheel protector 11 is completely closed with the exception of the recess 21 and its opening 23 opposite a workpiece holder (not shown).
  • a coolant supply 24 is attached to the grinding wheel guard 11 in the region of the opening 23.
  • the arrangement of the coolant supply 24 is such that a coolant nozzle 25 is directed onto a section 26 of the outer surface of the grinding wheel 13. This section 26 protrudes from the opening 23 of the grinding wheel guard 11. As can be seen in FIG.
  • the coolant strikes the grinding wheel approximately in the region of a cutting line (not shown), which is formed by the outer surface of the grinding wheel 11 and a vertically oriented (imaginary) plane touching the grinding wheel 13 .
  • the grinding wheel 13 is in engagement with a workpiece during machining along these lines of intersection.
  • an aperture 27 is integrated in the coolant supply, which closes the opening 23 above the engagement area of the grinding wheel 13 except for a gap 29 that is essentially constant in width. That remains Width of the gap is not constant as the diameter of the grinding wheel becomes smaller.
  • the point of engagement of the grinding wheel 13 is always at the same location, the distance between the point of engagement of the wheel 13 and the diaphragm 27 does not change.
  • the outlet opening for loose grinding wheel pieces and / or coolant entrained by the wheel 13 resulting from this distance remains small.
  • the fact that the coolant nozzle 25 is always directed toward the area in which the grinding wheel engages with the workpiece also contributes to reducing the contamination. In contrast to previously known grinding machines, the coolant nozzle 25 is not directed towards the workpiece, even without this having to be tracked, when the grinding wheel diameter is reduced.
  • the grinding wheel 13 is moved in a horizontal direction (arrow 31) within the stationary grinding wheel guard 11 translationally towards the workpiece in order to compensate for the reduction in diameter of the grinding wheel 13.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

The invention relates to the improvement of the functions of a grinding wheel guard in a grinding machine used to grind workpieces. The grinding machine comprises a workpiece receiving unit, a machine bed, a controlled drive unit which is connected to a grinding spindle, whereby a translatory mobile grinding wheel is rotationally driven and a cooling feed brings coolants into the contact area between the grinding wheel and the workpiece. According to the invention the grinding wheel guard (11) can be affixed to the grinding machine in relation to the machine bed (12) during a translatory movement of the grinding wheel (13).

Description

Schleifmaschine Grinding machine
Die Erfindung betrifft eine Schleifmaschine zur Schleifbear- beitung von Werkstücken, mit einer Werkstückaufnahme, einem Maschinenbett, einer mit einer Steuerung versehenen Antriebseinrichtung, welche mit einer Schleifspindel verbunden ist, wobei durch die Schleifspindel eine translatorisch bewegbare Schleifscheibe rotatorisch antreibbar ist, einer Kühlmittelzufuhr, durch die Kühlmittel in einen Eingriffsbereich der Schleifscheibe mit dem Werkstück bringbar ist, sowie einem SchleifScheibenschutz, zur Ausbildung eines Schleifscheibenraumes, in dem die Schleifscheibe anordenbar ist,The invention relates to a grinding machine for grinding workpieces, with a workpiece holder, a machine bed, a drive device provided with a control, which is connected to a grinding spindle, wherein a grinding wheel that can be moved in translation can be driven in rotation by the grinding spindle, a coolant supply through which Coolant can be brought into an area of engagement of the grinding wheel with the workpiece, as well as a grinding wheel protection, to form a grinding wheel space in which the grinding wheel can be arranged,
Derartige Schleifmaschinen werden in der Regel mit einem Schleifscheibenschutz versehen, der die Schleifscheibe der Maschine umgibt. Zweck des SchleifScheibenschutzes ist es zum einen, das während des Schleifprozesses verwendete Kühl- ittel zu sammeln um eine Verschmutzung der Maschine zu verhindern. Zum anderen soll der Schleifscheibenschutz das Bedienungspersonen vor abgelösten Scheifscheibenpartikel oder vor einer eventuell sogar gebrochenen Schleifscheibe schützen. Um diese Funktionen möglichst zu erfüllen, sind solche Schleifscheibenschutze stets in unmittelbarer Nähe der Schleifscheibe angeordnet ist. Aus diesem Grund ist unter einem "Schleifscheibenschutz" auch grundsätzlich etwas anderes zu verstehen als beispielsweise eine Maschinenraumkapselung. Wie deren Name schon andeutet, unterscheidet sich diese von einem Schleifscheibenschutz dadurch, dass sie den gesamten Maschinenraum - einschliesslich der Werkstückhalte- rung und dem Schleifspindelstock - umgibt.Such grinding machines are usually provided with a grinding wheel protector which surrounds the grinding wheel of the machine. The purpose of grinding wheel protection is, on the one hand, to collect the coolant used during the grinding process in order to prevent contamination of the machine. On the other hand, the grinding wheel protection is intended to protect the operator from detached grinding wheel particles or from a possibly even broken grinding wheel. In order to fulfill these functions as far as possible, such grinding wheel guards are always arranged in the immediate vicinity of the grinding wheel. For this reason, "grinding wheel protection" is also to be understood in principle as something different than, for example, a machine room encapsulation. As its name suggests, it differs from grinding wheel protection in that it surrounds the entire machine room - including the workpiece holder and the grinding headstock.
Es ist seit langem vorbekannt und üblich den Schleifschei- benschutz gegenüber der Schleifscheibenspindel zu fixieren. Dazu weist der Schleifscheibenschutz - je nach dem, ob die Spindel ein- oder beidseitig gelagert ist - eine, bzw. zwei sich gegenüberliegende, kreisrunde Öffnungen auf, durch welche die Spindel hindurchgeführt ist. Aufgrund dieser Fixierung ergibt sich, dass der Schlei"fscheibenschutz bei einer translatorischen Bewegung der Schleifscheibe mitgenommen wird. Solche translatorischen Bewegungen sind beispielsweise nach einem Abrichten als Zustellbewegung in Richtung des Werkstückes erforderlich, um die mit dem Abrichten verbundene Verkleinerung des Durchmessers der Scheibe zu kompensieren.It has been known for a long time and is customary to fix the grinding wheel guard in relation to the grinding wheel spindle. To do this, the grinding wheel guard - depending on whether the Spindle is supported on one or both sides - one or two opposite circular openings through which the spindle is passed. This fixation means that the grinding wheel guard is taken along when the grinding wheel is moved translationally. Such translational movements are required, for example, after dressing as a feed movement in the direction of the workpiece in order to compensate for the reduction in the diameter of the wheel associated with the dressing.
Die zuvor beschriebene Ausbildung von Schleifmaschinen kann jedoch in bezug auf das Einfangen des Kühlmittels nicht zufriedenstellen. Der Schleifscheibenschutz ist nämlich auf den Anfangsdurchmesser der grössten zu verwendeten Schleifscheibe abgestimmt. Werden kleinere Schleifscheiben eingesetzt, oder hat sich der Durchmesser einer Schleifscheibe nach mehrmaliger Verwendung und Abrichtung stark verringert, so wird der Abstand der Scheibe zum Schleifschütz grösser. Das von der Schleifscheibe mitgenommene Kühlmittel wird deshalb nur teilweise gegen den Schleifscheibenschutz geschleudert. Der andere Teil kann aus dem Schutz austreten und verschmutzt somit die Maschine. Handelt es sich hierbei um Rundschleifmaschinen, dann kommt hinzu, dass das Kühlmit- tel, wegen der Ausgleichsbewegung der Schleifscheibe zusammen mit dem Schleifscheibenschutz, auch auf ein rotierendes Werkstück auftrifft. Wie es sich gezeigt hat, verschmutzt das von dem Werkstück unkontrolliert abprallende Kühlmittel die Schleifmaschine.However, the above-described design of grinding machines cannot be satisfactory with regard to the trapping of the coolant. The grinding wheel protection is in fact matched to the initial diameter of the largest grinding wheel to be used. If smaller grinding wheels are used, or if the diameter of a grinding wheel has decreased significantly after repeated use and dressing, the distance between the wheel and the contactor becomes larger. The coolant entrained by the grinding wheel is therefore only partially thrown against the grinding wheel protection. The other part can escape from the protection and thus contaminate the machine. If these are cylindrical grinding machines, then there is also the fact that the coolant, due to the compensating movement of the grinding wheel together with the grinding wheel guard, also strikes a rotating workpiece. As has been shown, the coolant that bounces off the workpiece in an uncontrolled manner contaminates the grinding machine.
Da es insbesondere bei Rundschleifmaschinen üblich ist die Kühlmittelzufuhr aussen am Schleifscheibenschutz zu befestigt, ist es des weiteren nachteilig, dass durch die Verkleinerung des Durchmessers der Scheibe, das Kühlmittel nicht mehr auf die Mantelfläche der Scheibe auftrifft. Da somit zumindest kein, bzw. keine ausreichende Menge an, Kühlmittel in den Wirkbereich zwischen Werkstück und der Schleifscheibe gelangt, entstehen am j eweiligen Werkstück Brandspuren, wodurch solche Werkstücke zum Ausschuss werden . Dies lässt sich nur dadurch vermeiden, dass die Ausrichtung der Kühlmittelzufuhr dem j eweiligen Schleif scheibendurchmes- ser angepasst wird . Da Schleifmaschinen oftmals als Automaten ausgebildet werden, sind dazu relativ aufwendige motorisch angetriebene VerStelleinrichtungen notwendig .Since it is customary, particularly in the case of cylindrical grinding machines, for the coolant supply to be fastened to the outside of the grinding wheel protector, it is further disadvantageous that, by reducing the diameter of the wheel, the coolant no longer strikes the outer surface of the wheel. Since there is at least no or insufficient amount of If coolant gets into the effective area between the workpiece and the grinding wheel, burn marks are created on the respective workpiece, as a result of which such workpieces become rejects. This can only be avoided if the orientation of the coolant supply is adapted to the respective grinding wheel diameter. Since grinding machines are often designed as automatic machines, relatively complex motor-driven adjustment devices are necessary for this.
Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Schleifmaschine so zu gestalten, dass die oben genannten Funktionen des Schleifscheibenschutzes besser gewährleistet werden .The invention is therefore based on the object of designing a grinding machine in such a way that the abovementioned functions of grinding wheel protection are better guaranteed.
Diese Aufgabe wird bei einer eingangs erwähnten Schleifmaschine dadurch gelöst, dass der Schlei fscheibenschutz, während einer translatorischen Bewegung der Schleifscheibe, an der Schleifmaschine in bezug auf das Maschinenbett ortsfest anordenbar ist . Ausserde wird die Aufgabe durch einen Schleifscheibenschutz für eine mit einer Steuerung versehene Schleifmaschine gelöst, die ein Gehäuse aufweist, das einen Schleifscheibenraum zur Aufnahme einer Schleifscheibe ausbildet, sowie mit Mittel zur ortsfesten Fixierung des Gehäuses gegenüber der Schleifmaschine versehen ist .This object is achieved in a grinding machine mentioned at the outset in that the grinding wheel protection can be arranged in a stationary manner on the grinding machine with respect to the machine bed during a translational movement of the grinding wheel. In addition, the task is solved by a grinding wheel protector for a grinding machine provided with a control, which has a housing which forms a grinding wheel space for receiving a grinding wheel, and is provided with means for fixed fixing of the housing with respect to the grinding machine.
Da durch diese Lösung der Schleifscheibenschutz nicht mehr zusammen mit der Schleifscheibe am Schleifspindelstock befestigt ist, wird die durch den Schleifspindelstock zu bewegende Masse erheblich reduziert. Insbesondere in Verbin- düng mit Rundschleifmaschinen, bei denen der Schleifscheibenschutz üblicherweise im Wirkbereich zwischen der Schleifscheibe und dem Werkstück einseitig offen ausgestaltet ist, ergibt sich auch eine wesentliche Verbesserung beim Einfangen des Kühlmittels. Somit kann die bisher kaum zu ver ei- dende Verschmutzung der Maschine bei wechselnden Schleifscheibendurchmessern reduziert werden. Wie bereits erwähnt wurde, ist es bei Rundschleifmaschinen üblich, die Kühlmittelzufuhr aussen am Schleifscheibenschutz anzubringen. Da erfindungsgemäss der Schleifscheibenschutz der Schleifscheibe bei deren translatorischen Bewegung nicht mehr folgt, kann ein Nachführen der Düse der Kühlmittelzufuhr entfallen und aufwendige Verstell- und Nachführmechanismen für die Kühlmittelzufuhr vermieden werden. Gleich welchen Durchmesser die Schleifscheibe aufweist, die Kühl- mitteldüse ist stets auf den Eingriffsbereich der Mantelfläche der Schleifscheibe mit dem Werkstück gerichtet, wodurch die Gefahr von Brandspuren wesentlich verringert werden kann.Since this solution means that the grinding wheel guard is no longer attached to the grinding headstock together with the grinding wheel, the mass to be moved by the grinding headstock is considerably reduced. Particularly in connection with cylindrical grinding machines, in which the grinding wheel protector is usually designed to be open on one side in the effective area between the grinding wheel and the workpiece, there is also a significant improvement in the trapping of the coolant. This means that the contamination of the machine, which has so far been difficult to avoid, can be reduced with changing grinding wheel diameters. As already mentioned, it is common with cylindrical grinding machines to attach the coolant supply to the outside of the grinding wheel guard. Since, according to the invention, the grinding wheel protection no longer follows the grinding wheel during its translatory movement, there is no need to track the nozzle of the coolant supply and expensive adjustment and tracking mechanisms for the coolant supply can be avoided. Regardless of the diameter of the grinding wheel, the coolant nozzle is always directed towards the area of engagement of the outer surface of the grinding wheel with the workpiece, whereby the risk of burn marks can be significantly reduced.
Die Vorteile der vorliegenden Erfindung kommen zwar in Verbindung mit Rundschleifmaschinen, wie beispielsweise Innen-, Aussen- und Spitzenlos-Rundschleifmaschinen, besonders gut zum tragen. Selbstverständlich können aber auch andere Schleifmaschinen, insbesondere Flachschleif- maschinen erfindungsgemäss ausgebildet sein.The advantages of the present invention come to bear particularly well in connection with cylindrical grinding machines, such as internal, external and centerless cylindrical grinding machines. Of course, other grinding machines, in particular surface grinding machines, can also be designed according to the invention.
Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Further preferred embodiments of the invention result from the dependent claims.
Die Erfindung wird anhand den in den Figuren schematisch dargestellten Ausführungsbeispielen näher erläutert; es zeigen:The invention is explained in more detail with reference to the exemplary embodiments shown schematically in the figures; show it:
Fig. 1 eine teilweise geschnittene Darstellung einer ausschnittsweise gezeigten vorbekanntenFig. 1 is a partially sectioned representation of a known part shown
Schleifmaschine;Grinding machine;
Fig. 2 eine teilweise geschnittene Darstellung einer ausschnittsweise dargestellten erfindungs- gemässen Schleifmaschine. Zur Erläuterung der Unterschiede zwischen bisherigen Schlei fschutzen und einem erfindungsgemässen Schleifscheibenschutz wird nachfolgend zunächst eine in Fig . 1 ausschnittsweise dargestellte und dem Stand der Technik entsprechende Schleifmaschine erläutert . Wie durch einen Pfeil angedeutet ist, ist hier ein Schleif scheibenschutz 1 gegenüber einem Maschinenbett 2 beweglich angeordnet . Eine Schleifscheibe 3 befindet sich in einem durch den Schleifscheibenschutz 1 gebildeten Schleif scheibenraum 4 . Der geschnitten dargestellte Schutz 1 ist um eine Schleifspindel an einem verfahrbaren Schleif spindelstock 6 fixiert .2 shows a partially sectioned illustration of a grinding machine according to the invention, shown in sections. To explain the differences between previous grinding protection and a grinding wheel protection according to the invention, first of all, one in FIG. 1 shown in detail and corresponding to the prior art grinding machine explained. As indicated by an arrow, here a grinding wheel protection 1 is movably arranged relative to a machine bed 2. A grinding wheel 3 is located in a grinding wheel space 4 formed by the grinding wheel protection 1. The protection 1 shown in section is fixed to a grinding spindle on a movable grinding headstock 6.
Die in Fig . 2 dargestellte erfindungsgemässe numerisch gesteuerte Runds..cj leifmaschine ist mit einem Schleifschei- benschutz 11 versehen, der an dem Maschinenbett 12 mit geeigneten Befestigungsmitteln 14 , beispielsweise mit Schrauben, lösbar befestigt ist . Der Schleif scheibenschutz 11 ist somit fixiert und kann sowohl relativ gegenüber einer Schleifscheibe 13, als auch absolut gesehen, keine transla- torischen Bewegungen ausführen.The in Fig. 2 shown numerically controlled Runds..cj grinding machine is provided with a grinding wheel protection 11, which is releasably attached to the machine bed 12 with suitable fasteners 14, for example with screws. The grinding wheel protector 11 is thus fixed and cannot perform any translatory movements either relative to a grinding wheel 13 or in absolute terms.
Die sich auf einer Schleif spindel 15 befindende Schleifscheibe 13 ist innerhalb eines durch ein Gehäuse 16 des Schleif Scheibenschutzes 11 gebildeten Schleifscheibenraumes 17 angeordnet . In der Darstellung von Fig . 2 ist dieThe grinding wheel 13 located on a grinding spindle 15 is arranged within a grinding wheel space 17 formed by a housing 16 of the grinding wheel protection 11. In the representation of Fig. 2 is the
Schleifscheibe 13 durch eine gepunktete Kreislinie auch in einer zweiten Position in dem Schleif scheibenraum gezeigt . Wie zu erkennen ist, ist die Höhe H des Schleifscheibenraumes 17 nur unwesentlich grösser als der Durchmesser D der grössten verwendeten Schleifscheibe 13 . Die Länge desGrinding wheel 13 also shown in a second position in the grinding wheel space by a dotted circular line. As can be seen, the height H of the grinding wheel space 17 is only insignificantly greater than the diameter D of the largest grinding wheel 13 used. The length of the
Schlei fscheibenschutzes 11 ist hingegen weitaus grösser als der Durchmesser D der Schleifscheibe 13 .Grinding wheel protection 11, however, is much larger than the diameter D of the grinding wheel 13.
Damit die Schleifscheibe 13 in dem Schleifscheibenschutz 11 in horizontaler Richtung translatorisch bewegbar ist, weist dieser in seinem, einem Schleifspindelstock 18 gegenüber- liegendem, Blech 20 eine horizontal ausgerichtete lang- lochartige Ausnehmung 21 auf, durch die die Schleifspindel 13 in den Schleifscheibenraum 17 ragt und in der die Schleifspindel in horizontaler Richtung bewegbar ist. Solche translatorischen Bewegungen werden - ebenso wie die Rotationsbewegung der Schleifscheibe - von ausserhalb des Schleifscheibenraumes 17 angeordneten Antriebseinrichtungen erzeugt. Diese sind in einem Schleifspindelstock 18 angeordnet, in dem ausserdem die Schleifspindel 15 gelagert ist.So that the grinding wheel 13 can be moved in translation in the horizontal direction in the grinding wheel protection 11, the grinding wheel guard 13 has a grinding headstock 18 opposite it. lying, sheet metal 20 has a horizontally oriented slot-like recess 21 through which the grinding spindle 13 projects into the grinding wheel space 17 and in which the grinding spindle can be moved in the horizontal direction. Such translatory movements - like the rotational movement of the grinding wheel - are generated by drive devices arranged outside the grinding wheel chamber 17. These are arranged in a grinding headstock 18, in which the grinding spindle 15 is also mounted.
Das Gehäuse 16 des SchleifScheibenschutzes 11 hat im wesentlichen die Form eines Quaders, bei dem Endstücke einer Seitenfläche 22 zum Schleifscheibenraum hin abgewinkelt sind. Der Schleifscheibenschutz 11 ist mit Ausnahme der Ausnehmung 21 und seiner, einer nicht dargestellten Werkstückaufnahme gegenüberliegenden, Öffnung 23 vollständig geschlossen. Im Bereich der Öffnung 23 ist an dem Schleifscheibenschutz 11 eine Kühlmittelzufuhr 24 angebracht. Die Anordnung der Kühlmittelzufuhr 24 ist dabei so vorgenommen, dass eine Kühlmitteldüse 25 auf einen Abschnitt 26 der Mantelfläche der Schleifscheibe 13 gerichtet ist. Dieser Abschnitt 26 ragt aus der Öffnung 23 des Schleifscheibenschutz 11 heraus. Wie Fig. 2 entnommen werden kann, trifft das Kühlmittel dabei in etwa im Bereich einer (nicht dargestellten) Schnittgeraden auf die Schleifscheibe auf, die durch die Mantelfläche der Schleifscheibe 11 und einer vertikal ausgerichteten und die Schleifscheibe 13 tangential berührenden (imaginären) Ebene gebildet wird. Die Schleif- scheibe 13 steht während einer Bearbeitung entlang dieser Schnittgeraden mit einem Werkstück in Eingriff.The housing 16 of the grinding wheel protection 11 has essentially the shape of a cuboid, in which end pieces of a side surface 22 are angled towards the grinding wheel space. The grinding wheel protector 11 is completely closed with the exception of the recess 21 and its opening 23 opposite a workpiece holder (not shown). A coolant supply 24 is attached to the grinding wheel guard 11 in the region of the opening 23. The arrangement of the coolant supply 24 is such that a coolant nozzle 25 is directed onto a section 26 of the outer surface of the grinding wheel 13. This section 26 protrudes from the opening 23 of the grinding wheel guard 11. As can be seen in FIG. 2, the coolant strikes the grinding wheel approximately in the region of a cutting line (not shown), which is formed by the outer surface of the grinding wheel 11 and a vertically oriented (imaginary) plane touching the grinding wheel 13 . The grinding wheel 13 is in engagement with a workpiece during machining along these lines of intersection.
Wie Fig. 2 zeigt, ist in die Kühlmittelzufuhr eine Blende 27 integriert, die die Öffnung 23 oberhalb des Eingriffsbe- reiches der Schleifscheibe 13 bis auf einen im wesentlichen konstant breiten Spalt 29 verschliesst . Zwar bleibt die Breite des 29 Spaltes bei kleiner werdendem Durchmessern der Schleifscheibe nicht konstant. Da sich jedoch die Eingriffsstelle der Schleifscheibe 13 stets am gleichen Ort befindet, verändert sich der Abstand zwischen der Eingriffsstelle der Scheibe 13 und der Blende 27 nicht. Damit bleibt aber auch die sich durch diesen Abstand ergebende Austrittsöffnung für lose Schleifscheibenstücke und/oder von der Scheibe 13 mitgenommenem Kühlmittel unverändert klein. Zur Verringerung der Verschmutzung trägt ausserdem bei, dass, wie bereits erläutert wurde, die Kühlmitteldüse 25 stets auf den Bereich gerichtet ist, in dem die Schleifscheibe mit dem Werkstück in Eingriff steht. Anders als bei vorbekannten Schleifmaschinen ist somit die Kühlmitteldüse 25, auch ohne dass diese nachgeführt werden müsste, bei einer Verringerung des Schleifscheibendurch essers nicht auf das Werkstück gerichtet.As FIG. 2 shows, an aperture 27 is integrated in the coolant supply, which closes the opening 23 above the engagement area of the grinding wheel 13 except for a gap 29 that is essentially constant in width. That remains Width of the gap is not constant as the diameter of the grinding wheel becomes smaller. However, since the point of engagement of the grinding wheel 13 is always at the same location, the distance between the point of engagement of the wheel 13 and the diaphragm 27 does not change. However, the outlet opening for loose grinding wheel pieces and / or coolant entrained by the wheel 13 resulting from this distance remains small. The fact that the coolant nozzle 25 is always directed toward the area in which the grinding wheel engages with the workpiece also contributes to reducing the contamination. In contrast to previously known grinding machines, the coolant nozzle 25 is not directed towards the workpiece, even without this having to be tracked, when the grinding wheel diameter is reduced.
Verkleinert sich der Durchmesser der Schleifscheibe 13, beispielsweise durch Abrichten oder durch Abnutzung während des Schleifprozesses, so wird die Schleifscheibe in horizontaler Richtung (Pfeil 31) innerhalb des ortsfesten Schleifscheibenschutzes 11 translatorisch zu dem Werkstück hin zugestellt, um die Durchmesserverkleinerung der Schleifscheibe 13 zu kompensieren. If the diameter of the grinding wheel 13 decreases, for example due to dressing or wear during the grinding process, then the grinding wheel is moved in a horizontal direction (arrow 31) within the stationary grinding wheel guard 11 translationally towards the workpiece in order to compensate for the reduction in diameter of the grinding wheel 13.

Claims

Patentansprüche claims
1. Schleifmaschine zur Schleifbearbeitung von Werkstücken, mit1. Grinding machine for grinding workpieces, with
einer Werkstückaufnahme, einem Maschinenbett, einer mit einer Steuerung versehenen Antriebseinrichtung, welche mit einer Schleifspindel verbunden ist, wobei durch die Schleifspindel eine translatorisch bewegbare Schleifscheibe rotatorisch antreibbar ist, einer Kühlmittelzufuhr, durch die Kühlmittel in einen Eingriffsbereich der Schleifscheibe mit dem Werkstück bringbar ist, sowie einem Schleifscheibenschutz, zur Ausbildung eines SchleifScheibenraumes, in dem die Schleifscheibe anordenbar ist,a workpiece holder, a machine bed, a drive device provided with a control, which is connected to a grinding spindle, a grinding wheel that can be moved in translation by the grinding spindle, a coolant supply, through which coolant can be brought into an engagement area of the grinding wheel with the workpiece, and also a grinding wheel protection, to form a grinding wheel space in which the grinding wheel can be arranged,
dadurch gekennzeichnet, dasscharacterized in that
der Schleifscheibenschutz (11), während einer translatorischen Bewegung der Schleifscheibe (13) , an der Schleifmaschine in bezug auf das Maschinenbett (12) ortsfest anordenbar ist.the grinding wheel protection (11) can be arranged in a stationary manner on the grinding machine with respect to the machine bed (12) during a translational movement of the grinding wheel (13).
Schleifmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Schleifscheibenschutz (11) an dem Maschinengestell (12) selbst befestigt ist.Grinding machine according to claim 1, characterized in that the grinding wheel guard (11) is attached to the machine frame (12) itself.
3. Schleifmaschine nach einem oder beiden der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schleifmaschine als Rundschleifmaschine in Form einer Aussen- und/oder Innen- und/oder Spitzenlos- Rundschleifmaschine ausgebildet ist. 3. Grinding machine according to one or both of the preceding claims, characterized in that the grinding machine is designed as a cylindrical grinding machine in the form of an external and / or internal and / or centerless cylindrical grinding machine.
Schleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Kühlmitteldüse (25) der Kühlmittelzufuhr (24 ) an dem Schleif scheibenschutz ( 11 ) befestigt und auf den Eingriffsbereich der Schleifscheibe ( 13 ) mit dem Werkstück gerichtet ist . Grinding machine according to one or more of the preceding claims, characterized in that a coolant nozzle (25) of the coolant supply (24) is attached to the grinding wheel protector (11) and is directed towards the area of engagement of the grinding wheel (13) with the workpiece.
5. Schleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schleif scheibenschutz (11 ) mit einer langlochartigen Ausnehmung (21 ) versehen ist, durch die die Schleif spindel in den Schleif scheibenraum (17 ) ragt .5. Grinding machine according to one or more of the preceding claims, characterized in that the grinding wheel protection (11) is provided with an elongated hole-like recess (21) through which the grinding spindle protrudes into the grinding wheel space (17).
Schleifscheibenschutz für eine mit einer Steuerung versehene Schleifmaschine, umfassendGrinding wheel protection for a grinding machine provided with a control, comprising
ein Gehäuse, das einen Schleif scheibenraum zur Aufnahme einer Schleifscheibe aufweist,a housing which has a grinding wheel space for receiving a grinding wheel,
gekennzeichnet durchmarked by
Mittel zur ortsfesten Fixierung des Gehäuses (16) gegenüber der Schleifmaschine . Means for fixed fixing of the housing (16) in relation to the grinding machine.
PCT/CH1997/000319 1996-09-03 1997-09-01 Grinding machine WO1998009773A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19780914T DE19780914D2 (en) 1996-09-03 1997-09-01 Grinding machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH02156/96A CH691957A5 (en) 1996-09-03 1996-09-03 Grinder.
CH2156/96 1996-09-03

Publications (1)

Publication Number Publication Date
WO1998009773A1 true WO1998009773A1 (en) 1998-03-12

Family

ID=4227193

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Application Number Title Priority Date Filing Date
PCT/CH1997/000319 WO1998009773A1 (en) 1996-09-03 1997-09-01 Grinding machine

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Country Link
CH (1) CH691957A5 (en)
DE (1) DE19780914D2 (en)
WO (1) WO1998009773A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000028332A1 (en) * 1998-11-09 2000-05-18 Atherogenics, Inc. Methods and compositions to lower plasma cholesterol levels
CN103264351A (en) * 2013-05-28 2013-08-28 玉林市玉博机械有限公司 Protective cover for grinding head of horizontal lathe horizontal shaft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564780A (en) * 1969-05-06 1971-02-23 Cincinnati Milacron Inc Operator-protective shield
US3694971A (en) * 1970-08-31 1972-10-03 Cincinnati Milacron Inc Guard system for high speed grinder
FR2202455A5 (en) * 1972-10-04 1974-05-03 Schaudt Maschinenbau Gmbh

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564780A (en) * 1969-05-06 1971-02-23 Cincinnati Milacron Inc Operator-protective shield
US3694971A (en) * 1970-08-31 1972-10-03 Cincinnati Milacron Inc Guard system for high speed grinder
FR2202455A5 (en) * 1972-10-04 1974-05-03 Schaudt Maschinenbau Gmbh

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000028332A1 (en) * 1998-11-09 2000-05-18 Atherogenics, Inc. Methods and compositions to lower plasma cholesterol levels
CN103264351A (en) * 2013-05-28 2013-08-28 玉林市玉博机械有限公司 Protective cover for grinding head of horizontal lathe horizontal shaft

Also Published As

Publication number Publication date
DE19780914D2 (en) 2000-07-06
CH691957A5 (en) 2001-12-14

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